Comparing Dada to Pop Art

In this essay I will compare the Dada and Pop Art movements by depicting the characteristics of each art period, their style and social conditions that may have influenced the creation of each movement. The essay will describe the relationship between the Dada and Pop Art movements. The essay will show their similarities, differences, and the reason why Pop Art did not continue with the Dada tradition although Pop Art also utilized everyday objects as subjects to create art just like the Dada. Lastly, the essay will show how Pop Art is still very much part of today’s art world.Dada or Daism was an informal international art movement, with artists and followers in Europe and North America. The beginnings of this movement coincided with the outbreak of World War I. This artistic and literary movement started in 1916 and ended around 1923. Dada was born out of negative reaction to the World War I and as a way to protest against the conventional middle-class which the artists beli eved were the cause of the war. Dada excluded reason and logic, valuing nonsense, irrationality, irony and humor. The movement primarily involved visual arts, literature, poetry, manifestoes, art theory, theatre and graphic design. Art in the traditional sense was all about aesthetics, Dada represented the opposite. Dada’s intention was to offend and shock common sense. (â€Å"Pop art/dada†, 2013)Dada artists developed the collage, photomontage, assemblage and readymade techniques. The collage, which imitated the techniques used during cubism through the pasting of cut pieces of paper items to include items such as transportation tickets, maps, plastic wrappers in order to represent features of life instead of still life. Photomontage – this technique used scissors and glue rather than paintbrushes and paints to express views of modern life from images represented by the media.The assemblage technique – is a three-dimensional variations of a collage; whic h again used everyday objects to produce meaningful or meaningless (relating to the war) pieces of work. Lastly, the â€Å"readymades† – these were everyday objects found or  purchased and declared art by an artist. These objects would sometimes have titles and/or the artist’s signature to provoke deeper thinking on the viewer. During this period there was no predominant medium to Dadaist art. (â€Å"Dada†, 2013)Pop Art (short for Popular Art) emerged in England in the early 1950s and late 1950s in the United States lasting through the early 1970s. Pop Art origins developed for different reasons in Great Britain and the United States. In the United States, it was a response to impersonal, mundane reality, irony and parody. In Britain, the origin of post-World War II also included irony and parody but its main focus was on the images of American popular culture.Pop art was also a form of rebellion against abstract expressionism whose audience was a greed y middle class, according to the artists. Pop Art understood popular culture or so called material culture which was focused on the post-World War II generation who rebelled against the mysterious undertone of the abstract art. Pop artists wanted to express their hopefulness after so much poverty had been experienced during the World War II. (â€Å"Pop art-†, 2013)Pop Art was rooted in urban environment – London and New York. Pop Art used pieces of familiar images like advertising, labels, comic books, ordinary cultural objects, film, and television, to express conceptual formal relationships. In addition, the artist also duplicated common mass production images such as beer bottles, soup cans, comic strips, road sign paintings, collages and sculptures either by incorporating these objects into their paintings, collages and sculptures. Artists usually used very bright colors, and flat images. Pop art is symbolic and realistic. Lastly, Pop Art’s subjects are non- traditional which involves the viewer on the subject unlike the traditional still life motif which engaged the viewer on the formal qualities of the painting ignoring the subject. (â€Å"Pop art-†, 2013)Dada and Pop Art developed in part to oppose the status quo, standing up in opposition to the established elite art of their respective times. Pop Art and the Dadaist thought that the traditional artist was a prop of the elite and the powerful; hence, both movements created art that was anti aesthetic. Pop Art and Dadaism both used everyday objects to create art that was symbolic, realistic, and descriptive. Both movements used what was considered non-traditional motifs. Dadaism and Pop Art used their movement as a means of criticism for their respective times in which they lived. Lastly, Dada and Pop Art movements – to some degree – were influenced by a war. (â€Å"Pop art-† 2013)Pop Art was somewhat an extension of Dadaism. Pop Art also delved into some of the same subjects as Dadaism; however, Pop Art substituted the harsh, sarcastic, and radical impulses of the Dada movement with an appreciation to popular culture. Pop Art artists wanted to express their optimism to a culture born during post-War World II who sought to acquire consumer goods in response to mass media advertising. Pop Art did not critique the consumerists it simply recognized it as a natural fact of the times. (â€Å"Pop art/dada†, 2013)Marcel Duchamp’s, Fountain, 1917 is considered a ‘readymade’ artwork from the Dada movement. The sculpture has become one of the most recognized modernist works from the Dada movement. With the Fountain, Duchamp took an everyday object of life, and changed its useful significance by calling it something else. By giving it a new title and point of view, Duchamp created a new thought for the urinal. Duchamp’s insight that art can be about ideas instead of things, a notion that would ring true with la ter generations of artists. (Pop art/dada, 2013) Andy Warhol’s, Campbell’s Soup Cans, 1962, consisting of 32 canvases each being a painting of a can of soup flavor being offered at the time.There is no clear explanation as to why Warhol  chose to paint the soup cans, his usual reply to interviews as to why he painted the cans – he had soup every day. One of the traits of Pop Art is creating art from popular recognizable object that most everyone could relate to. Just like the Fountain, the concept was more important than the image. The fact that he chose to ‘create’ art by painting the cans correlates to Duchamp’s Fountain by which both artists style was more anti-art; utilizing common objects as subject matter, evoking interest from the viewer on the concept rather than the object. (â€Å"Campbell’s soup cans†, 2013)Pop Art is a direct descendant of Dadaism because it mocks the art world by using everyday motifs as subjects t o create art. The Dadaist originated an irrational way of images to provoke reaction from the public on their work. Pop artists adopted the same visual method but concentrated their interest on popular culture. The Pop Art movement replaced the negative, satirical and radical elements of the Dada movement. The Dadaist concentrated on anti-war politics, rejecting the prevailing standards in art by creating anti-art cultural works. (â€Å"Pop art†, 2013)The dawn of the Pop Art movement in the 50†²s not only impressed the wealthy, it changed the culture. So iconic and profound were the motivations behind this movement that its art is still featured, studied and produced today. It is clear that Pop Art was much more than just a fad, it is still very popular and it is continued to be called a success. It is hard to not identify traits of Pop Art as some of its peculiarities like the dotted image, strong and multiple colors, series of images on one print, famous people faces, and everyday objects continue to be used today. Pop Art can be found in print design on birthday cards, T-shirts, calendars, canvases, poster, and contemporary graphic design. (â€Å"The influence of†, 2010)

Communication Sytem

At the very beginning the message is encoded in a particular channel then it is sent and as soon as it is sent the message gets decoded by the receiver and then a feedback is sent back to let the sender know that message was received and understood.The functions are very simple and easy, communication is used for exchanging information, instructions, opinions and reinforce the establishment of all the relationships and even discuss problems.Through this, organizations meritoriously communicate with their employee's by giving instructions and informing them about NY changes in the organization. They also use it to motivate or even argue with some employees and it also helps to ask for approval or even show proposals in particular. The functions of communication are very simple that is required to forward clear-cut information only to the proposed precipitant in a suitable way. It should help identifying the users needs and wants. Telephonic devices:- Its is a primary source of communi cation, that can be used between two or even more individuals.Video and web conferencing:- A form of visual communication used by the organization to connect with their outer source ND their shareholders Social networking sites:- Each organization has page in the social networking sites in order to keep their customers, fans updated with their all new and their upcoming products. Online chat tools:- This tool is used mainly between the customers and organization. For example:- An Apple's customer has a problem with of the Apple products and it is late at night or even the customer is far from any Apple repair shop so this chat tool is to connect them.Fax:- Fax machines are an old sources of communication, which still exists. It provides the exact copies of comments, which is made through telecommunication. People who use this tool are suppliers, managers, Employees, etc. Emails:- They are electronically letters that are sent electronically to a number of accounts. It is one of the m ost preferred tools. Managers, suppliers, employees, government, and customers use it. Letters:- It is a written form of communication. Reports:- written reports of an earlier investigations and observations.Posters:- it is large printed posters that is a mixture of drawings, pictures and written information that is mainly used advertising, publication etc. It used used by government, supervisors to customers, suppliers and the general public. Flyers:- It is given out to large amount of people, it's a form of advertising. Organizations, suppliers and government to the customers and the general public use it. Billboards:- Large boards that is placed outside used for advertisements or even announcements. MEMO:- It provides the organization with permanent records for internal messages which also adds formality to internal communication.Meetings:- It helps with knowing everyone's ideas and opinions and discuses the ideas and also discuses did range of problems and resolve them. Training :-it provides the employees a better knowledge about the up coming products with the upcoming software's. Advertisements:- It is an important tool in Apple. Len, to communicate with their customers. They use different types of advertisement tools such as news paper adds, magazines, websites, social media, news letters, television ads, Youth ads etc.Time: – The time that is needed in order to prepare a message and the time time that is needed to forward the message by any form of tool, when there is a solution within he urgency of the message then only Apple can choose a form of communication. Distance:- The distance the message travels in by any form of tool. Apple needs to consider how much time will a massage need to be transmitted. Written records:- Written records can be used as proof, conformation, legal purposes or even stored which also can be copied and sent to the other party. Feed back:- For an effective communication instant feedback is needed.Confidentiality:- Due to the tools that are chosen the confidentiality might be lost. Such as telephone calls can be over heard, mails can be hacked, faxes can be read by any standing by the machine and letters can be read. Recipient:- Apple needs to consider the type of recipient in order for it send the message to be sent. Cost:- The cost of the message must not exceed the cost, in which Apple needs to find the least conceivable expense. Telephone:- Telephonic conversation needs time, confidentiality and the distance needs to looked after.The telephonic conversations are one of the steadiest ways to communicate to any one, but according to research, Apple uses this to communicate tit their shareholders. And it also depends on the urgency of the information that needs quick actions upon it. This tool could be taken as a confidential tool to exchange or pass out information. Even though, this tool is an easy way of communicating with all their shareholders but there are cases were there will be a proble m with networking system or no response from the other person. So if the information is very important and can't wait.And incase of international calls, Apple has to check the time zone. Even if it is the fastest and easiest but the risk beaming. Over-heard is heard. Emails:- It is one o the tools that communication in an easy to the customers, stakeholders this is where are able to communicate faster. They can send their feed distance is a no problem, emails can be sent to were ever the stakeholder is delivered easily. Some times, stakeholders don't replay back to emails sent due to some reasons. 3. 3 – Implement improvements to ensure greater integration of systems of communication in Apple Inc.Apple is all about simple marketing and effective communication, but there is always room for simplicity. According to Apple it should be smarter, functional, better and easier to use, they have this thing as that the business is all about problems and solving them for some one else, so the simplify all the process for all the clients. Apple's communication are:- Apple's images Apple's connections Apple associates weak communication with weak product or the opposite. To Apple,Len. Visual matters are very important, Apple's ads has lots of white space in it, they are designed that show the sense of openness.So it makes it easy on the customers to understand the key message. There commercials aren't even the length of a song but within the few that short minute the message is understood and it makes customers want the new lunching product. Its like you understand what they want you to understand. â€Å"Corporate communications teams need to Join the dots between strategy, behaviors and technology, to improve the flow and quality of communication and collaboration. † 3. 4 – Create personal plan to improve own personal communication skills.

Attachment Styles and Relationships

This paper will discuss how early relationships affect adults relationships later on in life. It will elaborate on the three dimensions each relationship has and they are passion, intimacy and commitment. The paper will include Robert Sternberg’s triangular theory of love. First, there are three types of attachments one may develop when we are infants. The first one is secure attachment. This manifests itself when an infant is with his or her mother and happily explores an unfamiliar environment.Furthermore, when the mother leaves, the infant will become distressed. On the other hand, when the mother returns, the infant runs to her and then continues playing (Bolt, 2004). Next, there is another type called avoidant attachment. These type of infants do not show distress when removed from their mother. They also do not cling to their mother upon reunion. They react to strangers in the same way they do with their mothers. They keep their attention focused on their toys (Bolt, 2004). The last type is called anxious attachment. In unfamiliar settings, these infants ling to their mother and cry when she leaves. However, when she returns, they are hostile. They do not explore their environment. These infants may continue to cry even after being picked up (Bolt, 2004). Attachment Styles and Relationships2 Furthermore, in adults relationships there are also three types. The first one is secure adults. This can be expressed when these adults find it easy to become close in a relationship. Their relationships are characterized by happiness, trust and friendship. They can accept and support their partners despite faults (Bolt, 2004). Next, the next type is avoidant adults. They are less invested in relationships and more likely to leave them. It seems that they are afraid to become too close to people. They have emotional highs and lows. They may have intimate relations with a partner without feeling love (Bolt, 2004). The last type of adult relationship is called anxious adults. These types are less trusting and demand reciprocation. They are generally more jealous and possessive. They may break up repeatedly with the same person. They can become angry and emotion hen discussing differences (Bolt, 2004). Furthermore, the reason this is so is because when these adult types were infants they lacked close physical proximity. This is important in any type of relationship. It helps for caregivers to for a bond with infants and adults to develop closeness in a relationship. Also, infants develop a feeling of security when they are held. The lack of this physical proximity contributes to the different attachment problems. This is an important aspect to look into. This means that a couple has to get to know each other’s similarities and differences. This is what brings them close to each other. This also helps the couple to learn what is best for their partner or spouse. Last, there are three types of commitment styles. The first one is personal commitment. This can been seen when two people are together because they enjoy each other. The second type is moral commitment. This happens when people feel an obligation to continue the marriage in order not to break their marital vows. This type of arriage is not based on true love. The third type is called constraint commitment in which people believe that they have to continue a relationship based on social, financial or emotional reasons. This is not a commitment out of love. In conclusion, to maintain a good relationship, a couple should have time to talk to each other. It is important to maintain good communication.

Poor listening Essay Example | Topics and Well Written Essays - 250 words

Poor listening - Essay Example are not able to patiently be attentive to what is being said especially in modern times when there are a lot of things that could attract people’s attention. This is what I personally observed from most people these days. Several times, I witnessed friends, family and co-workers who talk with each other while they are busy on their phones or are concentrating on other things. Their attention is often divided that there is already a difficulty in truly understanding each other and communicating well. Consequently, such events often result not only to misunderstanding but also for communications to stop. For instance, I once saw a friend seemingly disregard what his friend was saying by simply saying â€Å"yes† that the other person was obviously hurt. Although my friend was busy and was quite absorbed with her phone, her companion did not try to understand this because he felt he had the right to my friend’s full attention. As a result, the two did not speak with each other for a few days. This is the problem with poor listening skills. Hearing things is not enough but understanding and internalizing what is being said should be taken into consideration as

Five Guys Case Study Example | Topics and Well Written Essays - 1000 words

Five Guys - Case Study Example In 2002, the Five Guys model was opened for franchising and expanded rapidly- over 1000 outlets were expected to open by the end of 2011, with over $1 Billion in sales (Weiss, 2011). The standard Five Guys simple and authentic vibe is strictly maintained in all the different outlets. Five Guys is a fast food chain of restaurants which specialize in the three items of hamburgers, fries and hotdogs. However, their menu pricing, quality and service type places them in the sub category of fast casual dining. Fast Casual is used to describe service outlets which do not offer full table service but there is an expectation of better food quality and atmosphere than fast food restaurants. The ingredients used are of better quality and the kitchen is visible for the dinners. Five Guys promotes an atmosphere which invokes memories of a 1950’s diner combined with the same kind of homemade food. The limited menu also allows them to concentrate on providing the best of those items rather than diversifying and losing their personalized touch. Fast casual lies between fast food and casual dining, offering customers a better value for their money and a more comfortable dining atmosphere which is greatly appealing for the people of a nation hit by recession. While Five Guys was a pioneer in this category, many fast food restaurants are quickly adopting regenerated menus and a more personalized service to compete with and enter into the fast casual and quick service categories. For the restaurant chain their emphasis has been on creating a more-for-slightly more value proposition. By charging over the average price charged by other chains, Five Guys provide much better food and service for their customers. This has helped them to distinguish themselves from other chains and gain an edge over their direct and indirect primary competitor. These

Rhetorical Analysis of an Argument Essay Example | Topics and Well Written Essays - 750 words - 1

Rhetorical Analysis of an Argument - Essay Example n and Yaron Brook) argue that human rights and interests are beyond animal rights, but this argument is totally invalid because human beings and animals have equal right to lead peaceful lives. First of all, the authors label the animal rights activists as terrorists and this proves their bias against activism based upon equality and compassion towards other living things. Alex Epstein and Yaron Brook state that, â€Å"It is common to write off terrorist activity and the vicious statements of animal rights leaders as â€Å"extremist†, while maintaining that majority of people in the animal rights movement have benevolent intentions† (n.pag.). Within this context, the authors depend upon Rational Appeals by pointing out the importance of scientific experimentation as tool for survival. To be specific, the authors attract the readers’ attention towards deadly diseases and declare that the activists are not allowing conducting experiments. Besides, the authors make use of Emotional Appeals to influence the readers. For instance, the authors point out the violence and bloodshed created by the activists, but conceals the grass-root level reasons behind the same. The authors proclaim that, â€Å"Ominously, the crimes against Huntingdon are not isolated incidents; animal rights terrorists commit more than 1,000 crimes annually† (n.pag.). Besides, the authors quote scientific journals to prove their argument. This can be considered as the visible example of manipulation, i.e. the misuse of available information to back-up one’s invalid argument. Similarly, the authors depend upon Ethical Appeals to influence the readers. For instance, the authors serve at The Ayn Rand Institute, and this esteemed status as experts within the field of reasoning is cunningly utilized to influence the readers in general. So, one can see that the authors try to create public opinion against animal rights activism and ignores the business interest behind the tests conducted by Huntingdon

Reviews of the Articles about Global Problems Essay

Reviews of the Articles about Global Problems - Essay Example Soil, which is composed of organic and inorganic components, is an integral part of terrestrial life and many organisms including humans are greatly dependent on this vast resource. The organic or living components which are constituted by thousands of microbes, fungi, nematodes, mites and gophers play a vital role in maintaining soil health and fertility. The organic wastes that are present in the soil are processed by the soil microflora and the resulting nutrients are made available for the plants. Ground water is filtered and cleaned by the soil matter and soil also helps to retain atmospheric dust and other pathogens thereby contributing to cleaner air. Soil is also a major determinant of atmospheric carbon dioxide levels. Man-made activities such as plowing and soil changes due to erosion and neglect can result in the release of excessive amounts of carbon dioxide in to the atmosphere. Agricultural practices such as tillage can deprive the soil of essential organic nutrients an d the addition of fertilizer chemicals, pesticides and herbicides further deplete the soil nutrients. The large number of concrete layered on top of the soil in urban areas, heavy machines and pollution cause extensive and at times irreversible damages to soil life. The desert conditions in Africa are mainly due to extensive grazing and agriculture which has resulted in degradation of the top soil. The author further adds that unhealthy soil can also cause several human diseases. The increasing global warming poses a great threat to the biodiversity of the soil which can be adversely affected even with the slightest change in temperature and moisture. The author has also included the views of soil experts Eric B. Nelson and Diana H. Wall who respectively believe that soil... The essay "Reviews of the Articles about Global Problems" analyses eight articles by eight different authors about such global problems as like the effect of increasing carbon dioxide quantities on global warming, threats to soil life from globalization and industrialization, the harm of pesticides to the environment and the effect of technological advancements on humanity. For example, the article â€Å"The hidden world under our feet† by Jim Robbins focuses on soil life and the numerous threats that it faces due to globalization and industrialization around the world. Soil, which is composed of organic and inorganic components, is an integral part of terrestrial life and many organisms including humans are greatly dependent on this vast resource. The organic or living components which are constituted by thousands of microbes, fungi, nematodes, mites and gophers play a vital role in maintaining soil health and fertility. Another article â€Å"A Change in temperature† by Justin Gillis analyses the effect of increasing carbon dioxide quantities on global warming. Recent findings suggest that global temperature change is a more slow process and humans would be able to adapt to these changes. The major issue under consideration is about the sensitivity of the climate to increasing carbon dioxide concentration in the atmosphere. Earlier in the 19th century, Svante Arrhenius estimated the earth’s average temperature to increase by nine degrees Fahrenheit, though, now it is likely to be between three to eight degrees Fahrenheit.

Brief the case of Holmes v. South Carolina, 547 U.S. 319 (2006) Coursework

Brief the case of Holmes v. South Carolina, 547 U.S. 319 (2006) - Coursework Example However Holmes denied the charges and confessed that the crime was committed by a third party named Jimmy Mc Caw White. Holmes was of the opinion that the police framed him in this crime. Defendant also produces several witnesses who claimed that the third party was found in the premises of the crime scene during the hours of crime. Holmes produced several witnesses to prove that he was innocent in this case and was trapped by the police. He also asserted that the forensic results were manipulated by poor handling by the police officer. Issue: Is Holmes guilty for the death of the old women in South Carolina? Any case in order to be justified needs solid evidence against the person who is guilty. Moreover there is argument from the defendant that police his trying to frame him .Holmes suggested that The crime was committed by a third party and also produced witnesses for the same. The only proof against Holmes was the palm print, fiber of clothing and DNA elements found at the vicini ty and on victim respectively. .It was a known fact that the police officer handling the case dealt with evidence collection in a negligent manner. He collected the samples with bare hand and henceforth the results were not trust worthy. The issue before the court is that, on what basis they can prove the guiltiness of the defendant as to the crime. How can the court claim that Holmes committed the crime on the women? Court draws conclusion based on evidence found at the crime scene .With regard to this case all the forensic evidence provided was unreliable due to the poor handling of samples by the police officer. Rule: According to federal rule of evidence, rule 702 is a key one. Cornell University of law(2010) states that â€Å"If scientific, technical, or other specialized knowledge will assist the trier of fact to understand the evidence or to determine a fact in issue, a witness qualified as an expert by knowledge, skill, experience, training, or education, may testify theret o in the form of an opinion or otherwise, if (1) the testimony is based upon sufficient facts or data, (2) the testimony is the product of reliable principles and methods, and (3) the witness has applied the principles and methods reliably to the facts of the case†. Analysis: The Federal rule of evidence is crucial here as the whole case is centered around the validity of the forensic evidence found on the vicinity and victim. Once a crime is committed there should be strong evidence against the defendant in order to sentence the defendant. Even though, the evidence is found, the authenticity of it cannot be established due to the manipulation of them by the police officer. . The forensic result of the crime scene was not authentic as the police officer collected the samples without using gloves. This is against the law as samples are not obtained following the principles laid down by the civil procedure. Since the reliability of the evidence is very questionable, the court ca nnot pass any order against Holmes which prove him guilty Conclusion: Since the U.S. Supreme Court was not satisfactory about the credibility of the forensic results, there are no grounds to accuse the defendant of the crime. At the same time the probability of the involvement of the third party was ruled out on the basis of evidence found on the crime scene. Finally it can be concluded that Holmes involvement in the rape and murder could not be established due to lack of genuine evidence. Work cited Law School, Cornell University. (2010, December).

An Op-ed assignment Example | Topics and Well Written Essays - 750 words

An Op-ed - Assignment Example I guess that the organization that works to improve women`s health of all classes and social levels and which attracts public must be responsible when making such controversial decisions and must give report to the public. It seems to me that it would me reasonable to find out the opinion of donators and then make such drastic changes. The problem of breast cancer is familiar to me as I support a person who is fighting with this horrible disease. She is my sister whose diagnosis became a shock for the entire family as she was raising to little kids herself at that moment. When I got involved into daily care about my sister I realized how much could have been done if the screening had been conducted earlier and the tumor had been detected earlier. But we lived in the area where there was no opportunity to receive decent medical consultation or at least reliable information. My sister raised two daughters herself and the threat that someday they can become victims of this horrible disease pushed me to make some real changes. And instead of thinking about alternative ways of events for our family I have decided to make material contribution to the solution of the problem. So all I want to say is that for the people who deal closely with cancer and who made efforts to change something being only ordinary citizens such global changes proved that it is impossible to rely on some funds like these, unfortunately. The mission of Planned Parenthood was in sync and in alignment with the mission of Komen- they aimed to provide all the women with equal opportunities for effective treatment and diagnosis of breast cancer. It is well-known that prevention and timely detection is as important as treatment in case of breast cancer. The contribution of Planned Parenthood was obvious and fundamental- it helped to reach the least protected layers of American population: immigrants, those living in remote village areas.

The New Testament in the Modern Church Essay Example | Topics and Well Written Essays - 5500 words

The New Testament in the Modern Church - Essay Example t times and contexts have approached the subject from many different angles but they all have the same aim of reflecting on the subject systematically. Christology aims to â€Å"clarify the essential truths about him, it investigates his person and being and work† . (O’Collins, 1994, p. 1), It is accepted by all that humans can never fully comprehend the mystery of God, but equally it has always been a key mission of the Church to study, and to teach key elements of the faith in a way which is at least partially evident to believers, and as far as possible relevant to each successive historical period and social context. Johnson’s work is a good example of a contemporary theologian’s earnest attempts to get to grips with major issues like oppression of the poor and gender inequality, showing how and where the Church could and should evolve its mission to deal with these difficult challenges in the modern world. She identifies Christology as a starting poin t for discussion of these themes, arguing that hidden aspects of his being should be brought forward and that this process will prove especially relevant to the modern world. This paper will explore the strategies of interpretation that Johnson uses to present Jesus as â€Å"Sophia’s child, who communicates her gracious goodness by befriending the outcast, who communicates her prophetic message, and who proves her right or justifies her though he is severely criticized by others.† (Fox, 2001, p. 127) It will look first at Johnson’s starting point for this line of study, and then her use of Jewish traditions and Hellenistic influences, followed by her use of Patristic authorities through the ages. Finally Johnson’s use of modern social sciences will be outlined, including historical and and socio-political techniques so that a full picture of her methods of interpretation can be gained, as well as an appreciation of how effective she is in sustaining these claims about Jesus. Elizabeth A. Johnson is

Merits and Demerits of Globalisation Essay Example for Free

Merits and Demerits of Globalisation Essay Introduction Globalization or (globalisation) is the process by which the people of the world are unified into a single society and function together. Globalization is often used to refer to economic globalization: the integration of national economies into the international economy through trade, foreign direct investment, capital flows, migration, and the spread of technology. This process is usually recognized as being driven by a combination of economic, technological, socio-cultural, political and biological factors. The term can also refer to the transnational dissemination of ideas, languages, or popular culture. Globalization means increasing the interdependence, connectivity and integration on a global level with respect to the social, cultural, political, technological, economic and ecological levels. Effects of globalization:- ? enhancement in the information flow between geographically remote locations ? the global common market has a freedom of exchange of goods and capital ? there is a broad access to a range of goods for consumers and companies ? worldwide production markets emerge ? Corporations have greater flexibility to operate across borders ? Increased flow of communications allows vital information to be shared between individuals and corporations around the world ? Spread of democratic ideals to developed nations ? Greater interdependence of nation-states ? Reduction of likelihood of war between developed nations ? Workers in less developed countries should see an increase in wages and living benefits. If they do, their rising standard of living should help them consume products from developed nations. A virtuous circle can theoretically be created by a whole new middle class that didn’t exist. ? Peace should be easier to maintain between nations as no country would remain isolated in this new world order. The relationship of China and the United States has changed dramatically as their trade partner status has increased over the years. ? Globalization can help modernize developing countries faster. Modern ideas can be spread to the workers, who make up the social order. ? Products can be purchased much cheaper in developing countries, which increases the lifestyle of the people. As we pay less for simple common items, we have more to spend on big ticket items, which fuel higher paid manufacturing jobs in developed countries. Advantages of globalization in the developing world It is claimed that globalization increases the economic prosperity and opportunity in the developing world. The civil liberties are enhanced and there is a more efficient use of resources. All the countries involved in the free trade are at a profit. As a result, there are lower prices, more employment and a better standard of life in these developing nations. It is feared that some developing regions progress at the expense of other developed regions. However, such doubts are futile as globalization is a positive-sum chance in which the skills and technologies enable to increase the living standards throughout the world. Liberals look at globalization as an efficient tool to eliminate penury and allow the poor people a firm foothold in the global economy. In two decades from 1981 to 2001, the number of people surviving on $1 or less per day decreased from 1. 5 billion to 1. 1 billion. Simultaneously, the world population also increased. Thus, the percentage of such people decreased from 40% to 20% in such developing countries. Disadvantages of globalisation Disadvantages of globalisation are as follows:- ? Increased flow of skilled and non-skilled jobs from developed to developing nations as corporations seek out the cheapest labor ? Increased likelihood of economic disruptions in one nation effecting all nations ? Corporate influence of nation-states far exceeds that of civil society organizations and average individuals ? Threat that control of world media by a handful of corporations will limit cultural expression ?

Commercial Accounting Essay Example for Free

Commercial Accounting Essay Commercial accounting is an accurate account of business transactions, it can only be acquired if both cash and credit transactions are performed, recorded, and recognized in such a way that there can be no duplication and the transactions are recorded under commercial accounting. The system known as double entry book keeping or the commercial accounting system that records both aspects of transactions, also it records credit transactions in cash accounting the day of the receipt. The single entry in accounting for example: there is a sale, where the transaction is complete after the exchange of cash for goods. In commercial accounting the date in which the transaction was made needs to be recorded regardless to whether it was paid or it wasn’t. Generally Accepted Accounting Principles better known as (GAAP) is the collection of standards and practices that are required to be used by business’s to record and present the results of their financial activities and their records of what they owe, established by the Financial Accounting Standards Board (FASB). These accounting principles are standardized and used for the many private and publicly traded companies in America today. Every economic event within business must be associated with and recorded by a specific entity and business records must not include the personal assets or liabilities of the owner. If an idea holds no impact on a decision maker, investors, or creditors, then the relating (GAAP) principles do not have to be followed. (GAAP) requires the use of accrual basis accounting rather than cash basis accounting, this is imposed on businesses so that investors have a minimum level of consistency in the financial statements they use when analyzing businesses for investment purposes. The accrual basis of accounting over the cash basis of accounting in commercial accounting and generally accepted accounting principles (GAAP) is different depending on whether you run a large scale business or a small business. Cash basis is used mostly by small businesses where owners and creditors want a simple way to understand the financial statements and to understand whether there is a profit or loss in the business. Accrual basis is used by large businesses and when revenue is earned expenses are accrued. Cash basis gives you a clear picture of your cash flow, but does not give you a good idea of business in the long term because you are not recording income when it is actually earned. Accrual basis accounting accurately matches your income and expenses and if not managed carefully you could lose track of your actual cash flow, with accrual basis transaction statements they are recorded in which the events occur. You don’t have to wait until you see the money, or actually pay money out of your checking account, to record a transaction. References (Investopedia.com) (Wiley PLUS)

Social Work in Anti-Discrimination

Social Work in Anti-Discrimination Explain the role of the social worker and consider the purpose of intervention and service delivery making links with Anti-Discriminatory Practice and Anti-Oppressive Practice and the importance of working in partnership with users of services and other professionals and agencies. In this assignment I am going to be looking at mental health. In particular mental health affecting older people. I am aware that mental health issues affect people of all ages affecting each individual in a unique way. A social workers role can be described in many ways and the role can vary depending on the service user. However in general social workers aim to empower people to make decisions for themselves. An essential part of the social workers role is working as part of a multi-disciplinary team and sign-posting service users to all services applicable to them. The fundamental principles of good social work practice are knowledge, skills and values, they all go hand in hand. They are useful divisions that can aid understanding. To ensure good practice all 3 need to be used together, making competent social work practice. Focusing on mental health in older people as your client it is important a social worker to be aware of and work within The Mental Health Act 1983. The Mental Health Act 1983 was established to ensure approved mental health professionals assess and treat people with mental health conditions and to protect the rights of these service users. It provides safeguards for people in hospitals as well. When looking at the history of mental health what stands out is that through the centuries there has been an accepted way of dealing with people with mental health problems. However the used method in the past is now considered to be inhumane and largely unsuccessful, but also at this time alongside the orthodox practitioners there were others with a more enlightened approach. Most histories concentrate on the gruesome facts rather than the positive aspects, going back as far as Victorian times, for example the Victorian asylums. Historical notes show how there isnt much that is actually new in todays approaches, it has all been said before but the issue with their acceptance is that mainstream treatment still retains its hold. Mental health problems are considered to be more common in older adults. The most common mental health condition among older people is depression. Depression affects 1 in 5 older people living in the community and 2 in 5 living in care homes. -Adults in Later Life with Mental Health problems, Mental Health Foundation quoting Psychiatry in the Elderly (3rd edition) Oxford University Press (2002) (http://www.mentalhealth.org.uk/information/mental-health-overview/statistics, 2006) However another common illness affecting older people is dementia. Dementia affects 5% of people over the age of 65 and 20% of those over 80. About 700,000 people in the UK have dementia (1.2% of the population) at any one time. -National Institute for Clinical Excellence (2004) (http://www.mentalhealth.org.uk/information/mental-health-overview/statistics,   2006) As a social worker upon meeting the client, your initial role is to carry out a carers assessment. You need to carry out an accurate assessment to enable you to make the necessary recommendations and referrals. This leads to signposting to relevant services even when the client doesnt meet the service criteria. For successful signposting you need to have an accurate understanding of how relevant organisations in mental health are MIND. Your assessment gives you the relevant information to be aware of what you need to do for your client. You now need to gain trust and build a positive relationship. However you need to be professional and always be honest, you are not the clients friend, as being their friend conflicts with personal boundaries. You need to be clear and define your role to avoid confusion. You will be keeping records, discussing secrets and reporting to other professionals. A successful model of assessment for this type of client is SWOT. This involves looking at the strengths and weaknesses which are the advantages and disadvantages for our client. Then looking at the opportunities which involve looking at all opportunities for change that you can provide. The final part of your SWOT analysis means looking at the threats. SWOT analysis helps you to think through each issue allowing you to look at the problem and lead to possible solutions and prepare for possible threats. A major and vital part of this particular assessment is about whats happening now. A SWOT analysis provides evidence to explain your actions. It needs to be specific, and will vary dramatically from person to person. It is a helpful tool in helping you to weigh up the pros and cons and help you to balance them out. With mental health the actual illness is going to have a major affect on the SWOT analysis. The stage of the illness can be an advantage or a disadvantage. A threat with mental health will always be the deterioration of the illness. With older people family can be a major strength if they play an active part in the clients life. However bare in mind the lack of a family can be a big disadvantage, having affects on the client. Anti-oppressive practice is a piece of social work jargon, but is based on a very simple yet important idea. Social work is all about empowering others and assisting those who feel oppressed in getting both their needs and rights recognised and met. Anti-oppressive practice is informed by values and always takes into consideration both the views and experiences of oppressed people. Practitioners are required to analyse how the socially constructed divisions of race, age, gender, class, sexuality and disability, and the impact of differential access to resources interconnect and interact to define the life experiences of individuals and communities. (Davies, 2009, p14) Therefore the practitioner is able to both recognise and challenge all situations of oppression within their work. Anti-discriminatory practice emphasises the different ways in which people tend to be discriminated against, as individuals and groups, it also highlights the need for professional practice to counter such discrimination. Discrimination can occur due to lots of different types of oppressive differentiation. The primary goal of anti-discriminatory practice is the promotion of equality and social justice. (Davies, 2009, p13) Anti-discriminatory practice is not a separate social work theory or method, but a value that should under-pin all practice generally. Both anti-discriminatory and anti-oppressive practice theories seek to assist clients to gain awareness into how oppression affects their lives, and to promote different strategies for opposing discrimination and gaining mutual support. It should also prevent different agencies from being discriminatory. True partnership working can create empowerment. It is a basic part of good practice and of values work. Feeling the need to rescue the client is oppressive; you should be working with the service user to rescue themselves. Helping clients to become more independent and less dependent on the system is a positive way forward, and should have a positive long-term affect on the client. Effective partnership is based on a variety of factors and therefore will vary accordingly. A few of these factors are based on values, beliefs, ideals and even practical factors such as funding and resources. Social workers have a duty of responsibility to both the client and other family members who play an active role in the clients life. You should work together with your service user, their family and other agencies, you all need to be aware of difficulties and expect setbacks but remember you can get through it together. When working with other agencies you need to share the responsibility and have open and honest communication. A social workers role is one of both care manager and care co-ordinator. In mental health you will need to be working with other organisations and as it is a health issue you will be working with medical professionals.

Yahoo! Inc. Essay examples -- Business Marketing Case Studies

Yahoo! Inc. is a global Internet communications, commerce, and media company that offers a comprehensive branded network of services to more than 120 million users each month worldwide. As the first online navigational guide to the World Wide Web, www.yahoo.com is the leading guide in terms of traffic, advertising, household, and business user reach, and is one of the most recognized brands associated with the Internet. The company also provides online business services designed to enhance Yahoo!'s clients' Web services, including audio and video streaming, store hosting and management, and Web site tools and services. The company's global Web network includes 21 World properties. Yahoo! has offices in Europe, the Asia Pacific, Latin America, Canada and the United States, and is headquartered in Santa Clara, California. Yahoo! was developed and first made available in 1994 by the Company's founders, David Filo and Jerry Yang, while they were graduate students at Stanford University. The Company was incorporated in California on March 5, 1995, and commenced operations on that date. On May 18, 1999 the Company reincorporated in Delaware. In August 1995, the company commenced selling advertisements on its Web pages and recognized its initial revenues. The company experienced dramatic growth providing broadcast media, communications, and commerce services. Yahoo! completed several major acquisitions including GeoCities, an Internet company specializing in publishing tools and online communities, and Broadcast.com inc., an Internet company specializing in audio and video broadcasts over the Web. These acquisitions as well as many other ones have helped Yahoo! diversify the properties and services it offers to its clients, helping to establish it as a one-of-a-kind, all encompassing web portal. Yahoo! is the number-one destination of users of the Internet the world over. With over 110 million unique users and 485 million average daily page views during December 1999, Yahoo! has clearly proven its ability to attract Web users like moths to light. With Yahoo!'s customizable services available in the U.S. and in 21 countries in 12 languages, Yahoo! users worldwide can pay their bills, track their stock portfolios, purchase virtually any product imaginable, and find a host of other services including email and chat rooms, all within the virtual borders of the prime ... ... for the short-term it still faces possible downside. As good as Yahoo!’s prospects are for the future, with all of its new sources of revenue as well as with the new pay services it is implementing, Yahoo! still faces near term uncertainty for shareholders. With all of the market turmoil over the possibility of recession and economic downturn, Yahoo!’s current instability leaves it with room for a greater decrease in share price. I do however believe that over the long term Yahoo! has a strong outlook and will perform well for its shareholders. Although compelling at these levels, I would not buy shares in Yahoo! for the short term, as in the next 6 months I don’t see any improvement in Yahoo!’s finances. I would therefore buy a July-01 Put on Yahoo (Symbol: YHQSF), with the exercise price of $30, based on Friday February 23rd’s closing price of $25.43. This Put is $4.57 â€Å"in the money† and its last trade went through at 9 and 7/8. T his is less than the value computed by Black-Scholes of 11 and 1/64. I believe that over the next few months, Yahoo!’s shares will be trading below the current market price of $25.43, therefore making the Put a profitable investment with minimal risk.

Objectification of Women in The House of Mirth Essay -- House Mirth Es

Objectification of Women in The House of Mirth      Ã‚  Ã‚  Ã‚   Edith Wharton's The House of Mirth is an affront to the false social values of fashionable New York society.   The heroine is Lily Bart, a woman who is destroyed by the very society that produces her.   Lily is well-born but poor.   The story traces the decline of Lily as she moves through a series of living residences, from houses to hotel lodgings.   Lily lives in a New York society where appearances are all.   Women have a decorative function in such an environment, and even her name, Lily, suggests she is a flower of femininity, i.e. an object of decoration as well as of desirability to the male element.   We see this is very true once Lily's bloom fades, as it were, a time when she is cast aside by her peers no longer being useful as something to admire on the surface.   The theme of the novel in this aspect is that identity based on mere appearance is not enough to sustain the human soul physically or metaphysically.   Once she is no longer able to keep the "eye" of her peers, Lily finds herself with no identity and dies.   This analysis will discuss the theme of the objectification of women in a male dominated society inherent throughout the novel.    Lily Bart and her mother have been socially "ruined" in a sense because of the economic failures of their father and husband respectfully.   However, Lily's mother teaches her that she can still maintain a high social status if she marries well, i.e. a rich man. In fact, Lily's mother is known for making the most out of the least as she is "famous for the unlimited effect she produced on limited means" (Wharton 48).   In a society where women are considered valuable only for the appearance they present, it is impossible f... ...vel could possibly be that women are commodified from the cradle to the grave and that never in a male dominated society will they ever be fully appreciated as separate entities with whole identities equal and separate from males.      WORKS   CITED       Restuccia, F. L.   "The Name of the Lily:   Edith Wharton's Feminism(s)." The House of Mirth:   Case Studies in Contemporary Criticism.   Benstock, S. (ed.).   New York, Bedford Books, 1994, 404-418.    Robinson, L. S.   "The Traffic in Women:   A Cultural Critique of The House of Mirth."   The House of Mirth:   Case Studies in Contemporary Criticism.   Benstock, S. (ed.).   New York, Bedford Books, 1994, 340-58.    Wharton, E.   The House of Mirth.   New York, Bedford Books, 1994.    2                                                      

Our Concept of Time Essay -- Existence Creation Essays

Our Concept of Time If our perception of time can successfully be challenged, the implications are huge. The story of evolution, which is supported by our observations and is largely becoming accepted as truth, conflicts with most religious stories. The story of evolution, like many other scientific stories, is changing the story of religion. If God did not really create the earth in seven days, the days must be symbolic or represent time on a different scale. If God did not create the human species in the beginning and designate us to rule the earth, perhaps he set the ball rolling, knowing what was to come.* The story told by religion seems to be accommodating more and more to the story of evolution. Do these stories have to be mutually exclusive? Both stories are embedded in time. They are explanations of our existence based on history. An explanation outside of time is the only way that I can understand the supernatural to coexist with the natural, without denying facts or excessively accommodating for them. Can we think of an answer to the great question, "Why are we here?" without explaining it in terms of time? Can we even ask the question without wondering "Where did we come from? How did we get here?" or similar questions bounding our reality within time? Can we think of any story outside of time? This is a huge question that I do not pretend to be able to answer. But, through an exploration of our understanding and use of the concept of time, I hope to confuse our conception. It may be hard to truly imagine breaking the confines of time until we gain a better understanding by emerging ourselves in it, questioning it, and messing it up. Before we examine the possibility of a story told outside of time, it is ... ...time as a directional course of moments. Time is headed in a direction because we are. Time does seem to be upheld by reality. Most things that occur can happen in reverse order. Thermodynamics by "law" cannot. The second law of thermodynamics states that systems tend to a state of higher disorder. Obviously, this tendency is a tendency over time. Perhaps this increasing disorder is the basis of our understanding of time. But disorder depends on perspective. If we look at a single particle, disorder, and consequently time, are irrelevant if not imaginary. Therefore, it is not reality, but only our picture of reality which requires time. I do not have an answer to the conflict of the two stories we tell within our concept of time, but it is helpful to keep time in perspective, and to continue to play with it in order to change the reality that we understand.

Matrimonial Rights of Women Essay

Islamic law is a very great jurisprudence worldwide, Islamic law is defined as the law according to the Muslim faith and as interpreted from the Quran also known as Sharia law. The sacred law of Islam is an all-embracing body of religious duties, the totality of Allah’s commands that regulate the life of every Muslim in all its aspects. Important feature of Muslim law is the fact that there is no clear separation of Mosque (is a place of worship for followers of Islam) and state. Under Islamic law, the religion of Islam and the government are one. Islamic law is controlled, ruled and regulated by the Islamic religion; a theocracy. Islamic law purports to regulate all public and private behavior including personal hygiene, diet, sexual conduct, and child rearing. Islamic law now prevails in countries all over the Middle East and elsewhere covering 20 per cent of the world’s population. Despite its relative inflexibility, in some ways, Islamic law is superior to other systems of law, such as the preference given to arbitration in civil disputes. Islamic law composed of following elements * Sharia: * Quran * Sunnah of Prophet Muhammad (generally known as Hadith) * Sunnah, literally means path. * The Sunnah of Prophet Muhammad consists of his sayings, actions, approval and disapprovals. * ?Fiqh: * Collection of juridical opinions given by various jurists as they pondered over the day-to-day application of Sharia * ?Fatwa: * Legal opinions (typically non-binding) issued by qualified jurists. * Usually provided as an answer to a specific question. Sharia is based on wisdom and achieving people’s welfare in this life and the afterlife. Sharia is all about justice, mercy, wisdom, and good. Thus, any ruling that replaces justice with injustice, mercy with its opposite, common good with mischief, or wisdom with nonsense is a ruling that does not belong to the Sharia even it is claimed to be so according to some interpretations. The main criticism on Islamic law from the western society is â€Å"Islamic law discriminates women’s rights†. Western society has identified so many women’s right violating incidents occurred in the countries which practices Islamic law or the countries which identify themselves as an Islamic republic. For example the following incidents could be recognized as the discriminatory aspect of Islamic law. Traditionally, the Muslim woman marries at a young age to a man of her father’s choice. A husband is entitled to divorce any time, even against his wife’s will, by merely declaring verbally that this is his intention.Although the image of the egalitarian woman is slowly developing within some more secular Arab states, it remains largely confined to urban centers and upper-class circles. Ritual sexual mutilation of females is still common in rural areas of Egypt, Libya, Oman and Yemen. According to the UN, â€Å"utilization of Arab women’s capabilities through political and economic participation remains the lowest in the world in quantitative terms†¦.In some countries with elected national assemblies, women are still denied the right to vote or hold office. And one in every two Arab women can neither read nor write.† Wife-beating is a relatively common practice in Arab countries, and abused women have little recourse. As the State Department has noted regarding Jordan (and most of the Arab world): â€Å"Wife beating is technically grounds for divorce, but the husband may seek to demonstrate that he has authority from the Quran to correct an irreligious or disobedient wife by striking her.† Abstraction of all above issues points out that most of the restriction on Muslim women connected with their marital life. A patriarchy family system has been formed through Islamic norms and values. however Islamic legal experts and scholars denies the above statement and they strongly argue that Islamic law grants much wider rights to women’s especially in case of marriage life the Islamic women enjoys much wider rights other than non Islamic women’s. Now let’s analyze myths and facts regarding the matrimonial right s provided under the Islamic law. First of all let’s see how Islamic laws treat gender equality. â€Å"And women shall have rights similar to the rights upon them in a just and equitable manner; but men have a degree over them† (Holy Quran2:228). Interpretation given for the above verse by Islamic scholars is the rights of the wives in relation to their husbands are equal to their obligations toward their husbands but men in their obligations toward their wives stand a step further The â€Å"step further† of which the Quran speaks is not a position of greater rank or nobility. The â€Å"step† the Quran makes reference to is the obligatory duty given to the man in the care of the woman; it is not a degree of superiority. Allah ordained men with the responsibility to preserve and solely sustain women. The â€Å"step further† is in no way a form of dominance or preferment. The Quran consistently makes reference to equity, parity, and equilibrium among the genders. It disposes of genders and makes no distinction whatsoever between the superiority or inferiority of men and women. On the contrary, it is the piety of a person that distinguishes him or her by ranks or degrees, not gender or lineage. As stated in this verse â€Å"step further† husband duty bound to maintain his wife, Now let’s see how does Shariah law ensures the Right to Maintenance of a wife. The duty to maintain a wife is the sole responsibility of a husband under Islamic Law. This can be seen in the Quran where it states that: â€Å"Men shall take full care of women with the bounties which Allah has bestowed more abundantly on the former (men, with several special merits) than on the latter (women) , also because they spend a part of (their wealth) to maintain them†¦.† This command is further strengthened by a number of Hadith as follows: Prophet said the following concerning women,   Ã¢â‚¬  And their rights which are your responsibility is to feed and clothed them in accordance to their needs† Hence, from the above it is the duty and responsibility of a husband to support his wife from the day he married her. This responsibility continues as long as they are married to each other. Upon divorce, a husband has to maintain his wife during the iddah period which is approximately 3 months. After the 3 months is completed, a husband may no longer have to support her. Apart from maintenance a woman is also entitled to mutaah (consolidation payment upon divorce) and matrimonial property (harta sepencarian) In case of Maintenance Srilankan Muslim Marriage and Divorce Act provides that any claim for maintenance by or on behalf of a wife, legitimate child or illegitimate child (where both parents are Muslims) falls within the exclusive jurisdiction of the Quazi. A Muslim woman’s right to maintenance during marriage is derived from the concept of nafaqa, which encompasses the provision of basic needs such as food, clothing and accommodation to the wife. In contrast to the Maintenance Act, the husband has the primary obligation of providing support and a wife’s own financial means are irrelevant in determining her claim for maintenance. Maintenance after divorce is not recognized under Muslim personal law. However, the Muslim Marriage and Divorce Act provide three situations in which a divorced wife may claim maintenance: 1. until registration of the divorce; 2. During iddat (the period of time that a divorced wife must remain unmarried); and 3. If such woman is pregnant at the time of registration of the divorce, until she delivers the child. A wife who leaves her husband’s house without valid and sufficient reason is not entitled to claim maintenance from her husband under section 21 of the Muslim Marriage and Divorce Registration Ordinance. In the case of Seyed Mohamed V. Mohamed Ali Lebbe Court held that â€Å"When the woman abandons the conjugal domicile without any valid reason she is not entitled to maintenance. Simple refractoriness, as has been popularly supposed, does not lead to a forfeiture of her right But if she were to leave the house against his will without any valid reason, she would lose her right, but would recover it on her return to the conjugal domicile. What is a valid and sufficient reason for the wife to leave the husband’s home is a matter for the discretion of the Judge. As a general principle a wife who leaves her husband’s house on account of his or his relations’ continued ill-treatment of her†¦. continues entitled to her maintenance â€Å". Custody of the child Shariah law give priority to women’s in case of custody of child, One of the key relevant hadith is the following:, a woman came to the Prophet and said: ‘Truly my belly served as a container for my son here, and my breast served as a skin-bag for him (to drink out of) and my bosom served as a refuge for him; and now his father has divorced me, and he (also) desires to take him away from me.’ The Prophet said: ‘You have a better right to have him, as long as you do not marry again. From this hadith we could arrive a clear understanding that in case of child custody the Mother has the priority. However, if the mother marries again she would generally forfeit her right to custody. This concept in custody which favors to mothers has been adopted in several legal systems which include Muslim law as a personal law. For example in India the first and foremost right to have the custody of children belongs to the mother and she cannot be deprived of her right so long as she is not found guilty of misconduct. Mother has the right of custody so long as she is not disqualified. This right is known as right of hizanat (custody) and it can be enforced against the father or any other person. The mother’s right of hizanat was solely recognized in the interest of the children and in no sense it is an absolute right. Srilankan legal system also follows similar phenomena in regarding the custody of Muslim child which ensures the priority of the mother to keep her children under her custody even without the consent of her husband. In re Wappu Marikar case Wood Renton CJ stated that according to Shafii school, the custody of a girl remains with the mother, not merely until puberty, but till she is actually married; and in the case of a boy, till completion of his seventh year at all events, and from thence until puberty he may place himself under either parent whom he chooses. This case is a clear example to quote that srilankan Muslim law provides a wide safeguard to women’s in regarding the custody of child. Rights on matrimonial property Shariah law clearly defines the rights of women on property. The Muslim woman has always had the right to own and manage her own property. Marriage in Islam does not mean that the man takes over the woman’s property, nor does she automatically have the right to all his property if he dies. Both are still regarded as individual people with responsibilities to other members of their family – parents, brothers, sisters etc. The husband has the duty to support and maintain the wife, as stated in the Qur’an, and this is held to be so even if she is rich in her own right. He has no right to expect her to support herself, let alone support his children or him. If she does contribute to the household income this is regarded as a charitable deed on her part. Because of their greater financial responsibilities, some categories of male relations, according to the inheritance laws in the Qur’an, inherit twice the share of their female equivalents, but others, whose responsibilities are likely to be less, inherit the same share -mothers and fathers, for instance are each entitled to one sixth of the estate of their children, after bequests (up to one third of the estate) and payment of debts. Women are thus well provided for their husband’s support them, and they inherit from all their relations. They are allowed to engage in business or work at home or outside the house, so long as the family does not suffer, and the money they make is their own, with no calls on it from other people until their death. â€Å"Men shall have their share of that which they have earned, and women a share of that which they have earned†¦Ã¢â‚¬  (Quran4:33) From the above verse from Quran married women’s are treated sole owners of their property husband cannot claim any part of her property while marriage exist of dissolved. Moreover Upon marriage the husband is required to give his wife a mahr (dowry) which then becomes her exclusive property. A woman can work for financial gain, without any obligation on her part to contribute to the household expenses. Islam also gives her inheritance rights, making it a requirement for women to get their determined share. Two significant features regarding Muslim women matrimonial property are Mahr and Kaikuli. Mahr is like dowry in other communities which is demand by bride and provided by groom when marriage is solemnized. Mahr is a sole property of wife and husband did not have any interest on mahr property. Even after the dissolution of marriage husband cannot claim the mahr from wife but if there any balance has to be settled on agreed mahr the wife could claim that balance mahr after the dissolution of marriage. kaikuli means any sum of money paid or other movable property given or any sum of money or any movable property promised to paid or given, to a bridegroom for the use of bride, before or at the time of marriage by a relative of bride or by any other person. Husband has the ownership of kaikuli property but he is liable to pay it over to the wife if she demands it, even during the subsistence of the marriage. The obligation is to return the property to his wife whenever she demands it or, if she dies, to her heirs. Rights on marriage and divorce. Marriage in Islam is viewed as an important and sacred union between a man and woman that fulfills half of one’s religious obligations. A well-known passage in the Quran discusses marriage as follows: â€Å"Among His signs is that He created for you spouses from yourselves so that you might find repose with them. And He has placed between you affection and mercy. In that there are certainly signs for people who reflect.† (Quran 30:21). Marriage requirements There are basic requirements for marriage in Islam. First, a couple must mutually consent to the marriage. This requires both a clear proposal and acceptance. A woman also must have a WALI or legal guardian present during the process. If a WALI is not present a woman must be past puberty and competent to make the decision to marry. Brides are also entitled to a dowry that is typically negotiated at the same time as the marriage contract. The dowry is specifically a gift showing love and devotion to the bride. There are two types of dowries a bride is entitled to: the mahr and the MUAKHR, first, the mahr is the dowry given to the bride at the time of marriage before consummation takes place. She is not required to share this dowry and is free to do what she wishes with the gift. The bride is often asked her opinion to make sure she receives a gift she enjoys. MUAKHR is the second type of dowry that is given upon the death of the husband or the couple’s divorce. This is also referred to as the â€Å"deferred† dowry. MUAKHR is meant for both financial support and as a large consequence that the couple should consider when contemplating divorce. In situations of death, this amount is paid out before the estate is divided. If the estate cannot cover the entire amount, the wife is entitled to collect the amount from the husband’s surviving family members who are also heirs to the estate. She can also waive the obligation for any reason, including hardship on her husband’s family. Polygamy The most controversial topic in Islamic law is polygamy some critics say this concept is is a distinct violation of married women rights. However now let’s analyze what Islamic law says about polygamy and polyandry ‘If ye fear that ye shall not be able to deal justly with the orphans, Marry women of your choice, Two or three or four; but if ye fear that ye shall not be able to deal justly (with them), then only one, or (a captive) that your right hands possess, that will be more suitable, to prevent you from doing injustice’. (Quran 4:3) Historically, the practice of polygamy existed before Islam without restrictions. Islam limited the number of wives to four and established clear rules and regulations for the practice to ensure fair treatment of each wife. Polygamy is an option and not a requirement in Islam. As was mentioned earlier, Muslims must follow the laws of the land that they live in as long as it does not contradict the requirements of the faith. Polyandry, or marrying more than one husband, is not permitted to maintain the children’s lineage for purposes of inheritance and protect children’s rights as heirs. Monogamy is the normal practice in the majority of Muslim communities due to the financial and emotional burden it carries. Divorce TALAQ is the word, used in Islamic law for divorce. It is an Arabic word and means â€Å"set free†. It is only in unavoidable circumstances that TALAQ is permitted as a lawful method to bring marriage contract to an end Requirements for divorce in Shariah Law 1. He or she must have reached puberty and be capable of making a decision 2. He or she must be sane, conscious, alert, and free from intoxication or anger 3. He or she must be free from external pressure 4. His or her intention must be clear Divorce must take place after the wife’s menstrual period and no sexual relations have occurred since her period ended. If all the above factors are present, either the husband or wife can pursue a divorce or they can pursue a divorce jointly and amicably. In SriLanka Muslim marriage and divorce act provides clear guide line for the marriage and divorce procedure for Muslims. Most of the provisions in this act accordance with shariah law. In case of consent of the bride did not taken in account for marriage, consent of the bride is deliberate through the WALI (guardian of bride). This provision seems to be a clear violation of women’s right however he movement for Muslim personal law reforms in Sri Lanka from a feminist perspective has been spearheaded by the Muslim Women’s Research and Action Forum (MWRAF), a small group of professional Muslim women continuously emphasis the legislation to bring changes to ensure that the consent of both parties are obtained as an essential condition of a Muslim marriage and to make provision for the bride’s signature, given the fact that there is no space for her signature in the Muslim Marriage and Divorce Registration Form and it is the wali or marriage guardian who conveys her consent on her behalf. However this recommendation has not been taken account by the legislation yet. In case of divorce, second schedule of Muslim marriage and divorce act defines the steps to get a divorce by women which obviously accordance with Muslim Shariah Law. Eventually the authority of implementing the divorce is vest ed with the Quazi. Conclusion Sharia has certain laws which are regarded as divinely ordained, concrete and timeless for all relevant situations. It also has certain laws which are extracted based on principles established by Islamic lawyers and judges. The sharia as interpreted by Islamic lawmakers is believed by Muslims to be merely a human approximation of the true Sharia, which is understood as the divine and eternal correct path. In deriving Sharia law, Islamic lawmakers are not, therefore, actually creating divinely correct or incorrect actions beyond question, but rather attempting to interpret divine principles. Hence Sharia in general is considered divine, but a lawyer’s or judge’s extraction or opinion on a given matter is not, though the process and intention to refer to Allah’s law is divinely sanctioned Muslim laws developed from the shariah law are not merely reflecting shariah principles. It purely based on circumstances, traditions, communal influences and etc. as I stated earlier most of the critics from western society comments that shariah law lays some savage rules regarding women’s. But actually Islamic laws are the pioneer laws which grant wider rights to women’s. this article could only analyze the matrimonial rights grant to Muslim women’s by shariah law apart from this rights shariah laws has given adequate rights on each social activities for women’s. Islam provides rigid guide lines for pleasant domesticity. In Quran most of command orders the men to safeguard the women and to provide them all necessary rights and to treat hem equally. One of my favorite quotes in Quran is â€Å"The most honored of you [male] in the sight of Allah is he who is most righteous of you†: (49:13). Interpretation given by Islamic scholars for â€Å"righteous† is â€Å"maintaining the wife with equal rights† from this verse we could realize how far the Islamic shariah law ensures matrimonial rights of women. Srilankan Muslim law is Constructed from Muslim social and communal structure which consist Islamic shariah law as a core part of it. SriLanka Muslim law deals with almost all social conduct of Muslims. Most of the matrimonial disputes arises in Muslim families has been amicably solved by Quazi courts which operates under Muslim marriage and divorce act. As we have discussed earlier part of this article srilankan Muslim law tries to ensure the married women right and it bound to operate within the criteria of shariah law. However the core concept of shariah law is to prevent party (husband and wife) from exceeding their limits. I had an interview with a Quazi judge who had come across more than 3000 of matrimonial disputes he stated that â€Å"Muslim Marriage and divorce act bound by shariah law is primarily intended to bring a peaceful settlement regarding family issues. It provide safeguard to the married women for an extend, but we are required to act in moral manner which should give remedies for the weaker party (mostly women’s). Moreover most of the divorce application initiated by women’s and their husband are duty bound to provide adequate financial support to them even after dissolution of marriage this is a very essential safeguard for women’s. As per the Muslim law, matrimonial properties of women are entirely belonging to her. Even though I wish some changes should be brought in Muslim law regarding the consent of bride at the time of marriage and the duties of register when he registers a second marriage† -M.I. Abdul Qader Quazi Judge Akkaraipattu From the above statement we could understand Srilankan Muslim law has given matrimonial rights to a Muslim women for an extend. But it should be amended to meet the needs of modern era therefore government should take essential steps to find put the contemporary life style of Muslim people and Srilankan Muslim Law has Amend according to satisfy the modern need of the people. ——————————————– [ 1 ]. Ibn al Qayyim (One Islamic Scholar, d. 1347) [ 2 ]. Arab Human Development Report 2002, NY: UN, 2002. [ 3 ]. U.S. State Department, Reports on Human Rights Practices for 1999. [ 4 ]. Quran: Surah An?Nisa’:3 [ 5 ]. Riwayat Musli [ 6 ]. sec 34,35,36 and 38(2) of MARRIAGE AND DIVORCE (MUSLIM) act [Cap. 134 [ 7 ]. S. C. 565-Board of Kathis Appeal 488 [ 8 ]. 14 NLR 225 [ 9 ]. (Qur’an 4:11) [ 10 ]. sec 47 & 64 of Muslim marriage and divorce act. [ 11 ]. Sowdoona v. Muees 1[(1955) 57 N. L. R. 75; 53 C. L. W. 47.] [ 12 ]. Abu Dawoud, a companion of the Prophet, reported the following: Omair al-Asdee was reported as saying: ‘When I accepted Islam, I was married to eight wives. I discussed this with the Prophet Muhammad who said: â€Å"Keep four only, and divorce the other four.† [ 13 ]. See Hammudah Abd al Ati, Family Structure in Islam 54-56 (American Trust Publications 1977). [ 14 ]. sec29(4) of muslim marriage and divorce act.

Literary criticism Essay

Literature represents a language or a people: culture and tradition. But, literature is more important than just a historical or cultural writing. Literature introduces us to new worlds of experience. We learn from books and literature; we enjoy the triumphs and the tragedies of poems, stories, and plays; and we may even grow through our literary journey with books. In conclusion, we may discover meaning in literature by looking at what the author says and how he/she says it. We may interpret the author’s message. However we interpret literature, there is still an artistic quality to the works. Literature is important to us because it speaks to us, it is both universal and individual, and in many ways it affects us, for the better. When some people think of the word â€Å"Literature† they think of books like, Walden, Old man and the Sea, Tom Sawyer, Great Expectations, or Moby Dick. These are what some call â€Å"the classics. † While these few books are indeed literature do we subconsciously judge other books based on the styling’s of these few? People believe that the true meaning of â€Å"Literature,† is a literary work in which the readers mind is opened to new concepts and ideals. For a writing to be called â€Å"Literature† it doesn’t have to be considered a â€Å"Classic† nor does it need to follow the same construct as these so called â€Å"Classics†. The book, 11/23/63, is much more of a form of â€Å"Literature† than A Tale of Two Cities. Based solely on the fact that in the Stephen King novel, he places the thought of, â€Å"What if? † into your mind.. Whereas, â€Å"A Tale of Two Cities†, depicts the plight of the French peasantry in the years leading up to the revolution, as opposed to opening your mind. While A Tale of Two Cities, shows you what life was like in those times. Stephen King shows you an alternate universe in which there was but one change, and how that one change affects how history takes its course. When the author helps your mind, explore worlds of endless possibility, or sheds light on a new way to perceive things. That is when the author has created a â€Å"True† work of literary merit. The thing about the term, â€Å"Literature†, is that it doesn’t have just one meaning. Literature is comprised of many things, but while Webster definition of â€Å"Literature† is, â€Å"the production of literary work especially as an occupation. † The â€Å"True† meaning is open to interpretation, meaning that one person’s definition of the word may be completely different than another person’s definition. This is both the great and horrid thing about the term. When scholars classify writing as literature, they often consider it a book or writing that has stood the test of time and despite its age it has surpassed many other great works through history by receiving merit from the scholars, based on their description of the word, influential. You may agree that it should be considered a piece of â€Å"Literature†, if it has done this, and you would be right, but what if it was a great piece of literary art that didn’t become a best seller? And thus was cast into the abyss to be forgotten until stumbled across one day by a mind ready to take in what the author wanted to say. Would you consider it â€Å"Literature? † Or would you just leave it in the abyss because it never became a best seller? Take Moby Dick for example, it is considered to be one of the Great American Novels and a treasure of world literature. However, it never received enough credit to title it a â€Å"Best seller. †One literary work, also helps define my idea of the word Literature, is The Hobbit by J. R. R Tolkien. The reason I consider this a piece of â€Å"Literature† is because of the amount of imagery Tolkien uses to bring his world to life in the imagination of the reader. In this excerpt from that book, he describes every thought of the characters and his use of imagery helps create the scene in the mind of the reader. â€Å"The dark came into the room from the little window that opened in the side of The Hill; the firelight flickered-it was April-and still they played on, while the shadow of Gandalf’s beard wagged against the wall. The dark filled all the room, and the fire died down, and the shadows were lost, and still they played on. And suddenly first one and then another began to sing as they played, deep-throated singing of the dwarves in the deep places of their ancient homes; and this is like a fragment of their song, if it can be like their song without their music. † (The Hobbit, Page 15) Tolkien’s powerful use of imagery in that passage painted a clear picture of what happens while the dwarves sing. However, Splatterpunk also uses powerful imagery to paint pictures. The key difference between the imagery used Splatterpunk and the imagery used in The Hobbit, is how the imagery is used. In the novel, The Cipher, which combined intensely poetic language and lavish grotesqueries, the author, uses imagery to place the pictures into the mind of the reader using powerful and descriptive words. As opposed to Tolkien, who draws upon the reader’s imagination with basic descriptions to help create a sketch in his mind. Now, many would not consider this a form of â€Å"Literature† due to the lack of personal connection between the story and the reader. However, I consider this book, and even this passage alone, to be a form of â€Å"Literature† solely because it opens my mind to a new world full of adventure and intrigue, while keeping the reader glued to the book during the time he reads. Imagery is a powerful tool for both the author and the reader, for if the author isn’t clear with his use of imagery it breaks the reader’s attention and allows him to be lost within the story, and not in a good way. Tolkien also uses diction to place an image into the readers mind, and he does this in such a way the reader begins to sing the song in his own head. Far over the misty mountains cold To dungeons deep and caverns old We must away, ere break of day, To claim our long-forgotten gold. Goblets they carved there for themselves And harps of gold; where no man delves There lay they long, and many a song Was sung unheard by men or elves. The pines were roaring on the height, The winds were moaning in the night. The fire was red, it flaming spread; The trees like torches blazed with light (The Hobbit, Page 16) Literature is important to us because it speaks to us, it is both universal and individual, and in many ways it affects us, for the better. In ways we sometimes may never understand. Ultimately, we may discover meaning in literature by looking at what the author says and how he/she says it. We may interpret the author’s message in one way, while someone else finds the message a different way. In this way we see how the definition of â€Å"Literature,† is subjective to both the readers own interpretation, and the overall meaning of the work. Because even when it is ugly, literature is beautiful. Sources Cited Tolkien, John R. R. The Hobbit. N. p. : George Allen & Unwin, 1937. 15. Web.

Mini Project

CONTENTS 1| ABSTRACT| | 2| ABBREVIATION| | 3| INTRODUCTION TO NC AND CNC| 4| 4| HISTORY| 7| 5| CNC SYSTEM ELEMENTS| 10| 6| WORING ON CNC MACHINES| | 7| BASIC CONCEPTS OF PART PROGRAMMING| 16| 8| TYPES OF CNC MACHINES| 18| 9| PROPERTIES OF CNC MACHINES| 20| 10| DRILLING AND TAPPING ON CNC| 35| 11| APPLICATIONS OF CNC MACHINES| 49| 12| ADVANTAGES AND DISADVANTAGES OF CNC| 51| 13| CONCLUSION| 52| LIST OF FIGURES PAGE NO 1| Hydrotel Milling Machine| 5| 2| Chiron CNC Machine| 5| 3| CNC Lathe Machine| 6| | CNC elements block diagram| 10 | 5| Point to Point tool path| 11| 6| Contour Tool Path| 12| 7| Continuous path tool movements| 18| 8| Continuous path controllers| 19| 9 | Schematic Illustrations of components(a)An open loop(b)A closed loop control| 19| 10| CNC Lathe| 21| 11| CNC Grinders| 21| 12| CNC Drilling| 22| 13| CNC Boring machine| 22| 14| Electrical Discharge Machines (EDM)| 23| 15| Laser cutting machine tools| 23| 16| Flat bed CNC Lathe| 25| 7| Slant bed CNC Lathe| 25| 18| CNC To ol Turrent| 26| | | | | | | | | | | | | 28| Different tools in Drilling machines| 26| 20| Tool Holders| 27| 21| CNC with Fanuc control| 28| 22| CNC setter| 29| 23| Override Speed setter| 31| 24| CNC Backlash| 32| 25| Sensitive Drilling machine| 37| 26| Radial drilling machine| 38| 27| Up-right Drilling machine| 38| 28| Drill materials| 39| 29| Tool nomenclature| 40| 30| Tool holding devices| 41| 31| Various operations of drilling machines| 42| 32| Counter Boring| 43| 33| Counter sunk| 43| 34| Spot Facing| 43| 35| Hands Taps| 46| 36| Holding Devices| 48| 7| Types of Clamps and C- Clamps| 49| 38| Products used in Aerospace Industry| 49| 39| 5 Axis CNC Milling machine| 50| 3. INTRODUCTION TO NC AND CNC Numerical control  (NC) refers to the  automation  of  machine tools  that are operated by programmed commands encoded on a storage medium, controlled manually via hand wheels or levers, or mechanically automated via cams alone. The first NC machines were built in the 1940s and 1950s. These early servomechanisms were rapidly augmented with analog and digital computers, creating the modern  computer numerical control  (CNC) machine tools that have revolutionized the  machining  processes.The program is translated into the appropriate electrical signals for input to motors that run the machine. A CNC machine is an numerical control machine with the added feature of an on board computer. The computer is referred to as the machine control unit (MCU). In modern CNC systems, component design is highly automated using  computer-aided design  (CAD) and  computer-aided manufacturing (CAM) programs. The programs produce a computer file that extracts the commands needed to operate a particular machine, and then loaded into the CNC machines for production.Since any component might require the use of a number of different tools-drills, saws, etc. , modern machines often combine multiple tools into a single â€Å"cell†. The Evolution of NC It was i n 1947 when numerical control was born. It began when John C. Parsons of the Parsons Corporation, Traverse City, Michigan, a manufacturer of helicopter rotor blades, could not make his templates fast enough. So, he invented a way of coupling computer equipment with a jig borer. Mr. Parsons used punched cards to operate his digit Ron system. 1949 was the year of another â€Å"Urgent need†. The U. S.Air Material command realized that parts for its planes and missiles were becoming more complex. Also, as the designs were constantly being improved, changes in the drawing were frequently made. Thus, in their search for methods of faster production, an Air Force study contract was awarded to the Parsons Corporation. The servo mechanisms laboratory of the Massachusetts Institute of Technology (MIT) was the subcontractor. In 1951, MIT took over the complete job, and in 1952, the prototype of today’s NC machine, a modified Cincinnati Hydrotel Milling Machine, was successfully d emonstrated.The numerical control was originated at MIT. Fig:1 Fig:2 CNC MACHINES CNC stands for Computer Numerically Controlled. CNC refers to how a machine operates, that is, its basic method of controlling movement, e. g. , a CNC machine uses a stream of digital information (code) from a computer to move motors and other positioning systems in order to guide a spindle or other tooling over raw material. A CNC machine uses mathematics and coordinate systems to understand and process information about what to move, to where, and how fast.Most CNC machines are able to move in three controlled directions at once. These directions are called axes and are given simple names such as X, Y and Z (based on the Cartesian Co-ordinate System). The X axis is always the longest distance a machine or a part of a machine must travel. X may be the movement from front to back, Y the movement from left to right, and the Z is almost always vertical movement (normally the spindle’s positioning movement up and down). Superior Machinery sells many types of CNC Machines, from CNC Horizontals, CNC Verticals to CNC Lathes; they have over 182 CNC Machines to choose from.A CNC machine must be able to communicate with itself to operate. A computer numeric control unit sends position commands to motors. The motors must talk back to the control that, indeed, they have acted correctly to move the machine a given distance. The ability of CNC machines to move in three (or more) directions at once allows them to create almost any desired pattern or shape. All of this processing happens very fast, accurately and consistently. 4. HISTORY Fig:3 In 1775, John Wilkinson- cannon boring machine (lathe). In 1881, Eli Whitney- milling machine. In 1947, Mr.John Parsons began experimenting for using 3-axis curvature data to control the machine tool motion for the production for aircraft components. In 1949, parsons- first NC machine. In 1951, MIT was involved in the project. In 1955, after refine ments NC became available in industry . Today, modern machineries are CNC milling machines and lathes. CNC technology was developed in the United States in the 1950? s for the US Air Force by metalworking machine tool builders. It was a major advance in the ability of machines to faithfully reproduce complex part machining steps more accurately without human intervention or variability.Numerical control (NC) refers to the automation of machine tools that are operated by abstractly programmed commands encoded on a storage medium, as opposed to manually controlled via handwheels or levers, or mechanically automated via cams alone. The first NC machines were built in the 1940s and 1950s, based on existing tools that were modified with motors that moved the controls to follow points fed into the system on punched tape. These early servomechanisms were rapidly augmented with analog and digital computers, creating the modern computer numerical control (CNC) machine tools that have revolut ionized the machining processes.In modern CNC systems, end-to-end component design is highly automated using computer-aided design (CAD) and computer-aided manufacturing (CAM) programs. The programs produce a computer file that is interpreted to extract the commands needed to operate a particular machine via a postprocessor, and then loaded into the CNC machines for production. Since any particular component might require the use of a number of different tools-drills, saws, etc. , modern machines often combine multiple tools into a single â€Å"cell†.In other cases, a number of different machines are used with an external controller and human or robotic operators that move the component from machine to machine. In either case, the complex series of steps needed to produce any part is highly automated and produces a part that closely matches the original CAD design. Proliferation of CNC The price of computer cycles fell drastically during the 1960s with the widespread introduc tion of useful minicomputers. Eventually it became less expensive to handle the motor control and feedback with a computer program than it was with dedicated servo systems.Small computers were dedicated to a single mill, placing the entire process in a small box. PDP-8? s and Data General Nova computers were common in these roles. The introduction of the microprocessor in the 1970s further reduced the cost of implementation, and today almost all CNC machines use some form of microprocessor to handle all operations. The introduction of lower-cost CNC machines radically changed the manufacturing industry. Curves are as easy to cut as straight lines, complex 3-D structures are relatively easy to produce, and the number f machining steps that required human action have been dramatically reduced. With the increased automation of manufacturing processes with CNC machining, considerable improvements in consistency and quality have been achieved with no strain on the operator. CNC automatio n reduced the frequency of errors and provided CNC operators with time to perform additional tasks. CNC automation also allows for more flexibility in the way parts are held in the manufacturing process and the time required to change the machine to produce different components.During the early 1970s the Western economies were mired in slow economic growth and rising employment costs, and NC machines started to become more attractive. The major U. S. vendors were slow to respond to the demand for machines suitable for lower-cost NC systems, and into this void stepped the Germans. In 1979, sales of German machines surpassed the U. S. designs for the first time. This cycle quickly repeated itself, and by 1980 Japan had taken a leadership position, U. S. sales dropping all the time. Once sitting in the #1 position in terms of sales on a top-ten chart consisting entirely of U. S. ompanies in 1971, by 1987 Cincinnati Milacron was in 8th place on a chart heavily dominated by Japanese firm s. Many researchers have commented that the U. S. focus on high-end applications left them in an uncompetitive situation when the economic downturn in the early 1970s led to greatly increased demand for low-cost NC systems. Unlike the U. S. companies, who had focused on the highly profitable aerospace market, German and Japanese manufacturers targeted lower-profit segments from the start and were able to enter the low-cost markets much more easily. As computing and networking evolved, so did direct numerical control (DNC).Its long-term coexistence with less networked variants of NC and CNC is explained by the fact that individual firms tend to stick with whatever is profitable and their time and money for trying out alternatives is limited. This explains why machine tool models and tape storage media persist in grandfathered fashion even as the state of the art advances. 5. CNC SYSTEM ELEMENTS A typical CNC system consists of the following six elements. 1 Part program 2 Program inpu t device 3 Machine control unit 4 Drive system 5 Machine tool 6 Feedback system Fig:4 6. WORKING OF CNC MACHINES:CNC machines are Controlled by G and M codes. These are number values and co-ordinates. Each number or code is assigned to a particular operation. Typed in manually to CAD by machine operators. G&M codes are automatically generated by the computer software. The tool or material moves. Tools can operate in 1-5 axes. Larger machines have a machine control unit (MCU) which manages operations. Movement is controlled by a motor (actuators). Feedback is provided by sensors (transducers) Closed loop. Tool magazines are used to change tools automatically. Tool Paths and Cutting   Motions:Tool paths describe the route the cutting tool takes. Motion can be described as point to point, or contouring. Speeds are the rate at which the tool operates e. g. rpm. Feeds are the rate at which the cutting tool and work piece move in relation to each other. Expressed in IPM (inches per minu te) Feeds and speeds are determined by cutting depth, material and quality of finish needed. e. g . harder materials need slower feeds and speeds. Rouging cuts remove larger amounts of material than finishing cuts. Rapid traversing allows the tool or work piece to move rapidly when no machining is taking place.Fig:6 Point to Point Tool path Fig:5Contour ToolPath 1. Point to Point tool paths cut following lines 2. Contour tool paths cut follow surfaces Linear Interpolation: (Point to Point) Linear interpolation consist of a programmed point linked together by straight line Fig:7 Circular Interpolation: (Contour) Circular interpolation is the process of programming arcs and circles. Circular interpolation requires endpoints, a feed rate, a center, a radius, and a direction of movement. Block of Information: When running, a part program is interpreted one command line at a time until all lines are completed.Fig:8 N001 G01 X1. 2345 Y. 06789 MO3 N001:Represents the sequence number of the operation G01: Represents linear operation (tool movement) X12345: Will move the tool or table 1. 2345 in. a positive direction along the X axis Y6789:Will move the tool or table 0. 6789 in. along the Y axis M03:Turns spindle on clockwise Commands, which are also referred to as blocks, are made up of words which each begin with a letter address and end with a numerical value. Each letter address relates to a specific machine function. â€Å"G† and â€Å"M† letter addresses O-Program number (Used for program identification)N-Sequence number (Used for line identification) G-Preparatory function X-X axis designation Y-Y axis designation Z-Z axis designation R-Radius designation F-Feed rate designation S-Spindle speed designation H-Tool length offset designation D-Tool radius offset designation T-Tool Designation M-Miscellaneous function G- CODES (Preparatory Functions) which cause some movement of the machine table or head. G00 – Rapid Movement G01- Linear Interpo lation (movement) G02- Circular Interpolation, CW G03- Circular Interpolation, CCW G17 -XY Plane,G18- XZ Plane,G19 -YZ Plane G20/G70 -Inch unitsG21/G71 -Metric Units G40- Cutter compensation cancel G41 -Cutter compensation right G43- Tool length compensation (plus) G43- Tool length compensation (plus) G44- Tool length compensation (minus) G49-Tool length compensation cancel G80-Cancel canned cycles G81-Drilling cycle G82-Counter boring cycle G83-Deep hole drilling cycle G90-Absolute positioning G91- Incremental positioning M-CODES (Miscellaneous) which turn ON or OFF different functions M00 -Program stop M01 -Optional program stop M02 -Program end M03- Spindle on clockwise M04 -Spindle on counterclockwise M05- Spindle stop M06- Tool change . BASIC CONCEPTS OF PART PROGRAMMING Part programming contains geometric data about the part and motion information to move the cutting tool with respect to the worpiece. Basically, the machine receives instructions as a sequence of blocks contain ing commands to set machine parameters; speed, feed and other relevant information. A block is equivalent to a line of codes in a part program. N135 G01 X1. 0 Y1. 0 Z0. 125 T01 F5. 0 These define: N135-Block number G01-G codes X1. 0, Y1. 0, Z0. 125-Coordinates T01-Tool number F5. 0-Special function Programming Methods Automatically Programmed Tools (APT):A text based system in which a programmer defines a series of lines, arcs, and points which define the overall part geometry locations. These features are then used to generate a cutter location (CL) file. Computer Aided Machining (CAM) Systems-Computer Aided Design (CAD) Systems: CAD/CAM systems allow for rapid development and modifying of designs and documentation. The 3D geometric model produced becomes a common element for engineering analysis (FEA), machining process planning (including CNC part programming, documentation (including engineering drawings), quality control, and so on.Drives of CNC machine tool Hydraulic actuator – high power machine tool Stepping motor – small machine due to limited power and torque DC motor – excellent speed regulation, high torque, most widely used. 8. PROPERTIES OF CNC MACHINES Based on Motion Type: Motion control – the heart of CNC: Point-to-Point or Continuous path Based on Control Loops: Open loop or Closed loop Based on Power Supply: Electric or Hydraulic or Pneumatic Based on Positioning System: Incremental or Absolute Point-to-Point Tool Movements: Point-to-point control systems cause the tool to that point only.The tool is not in continuous contact with the part while it is moving. Examples: drilling, reaming, punching, boring and tapping. Fig:9 Continuous-Path Tool Movements : Continuous-path controllers cause the tool to maintain continuous contact with the part as the tool cuts a contour shape. These operations include milling along any lines at any angle, milling Fig:10 Arcs and lathe turning. Loop Systems for Controlling Tool Movem ent: Schematic illustration of the components of (a) an open-loop and (b) a closed-loop control system for a CNC machine. 9. TYPES OF CNC MACHINES * Lathe Machine * Milling Machine Drilling Machine -The bench drill -The pillar drill * Boring Machine * Grinding Machine CNC Mills: These machining centers use computer controls to cut different materials. They are able to translate programs consisting of specific number and letters to move the spindle to various locations and depths. Used to make 3D prototypes, moulds, cutting dies, printing plates and sights. CNC Lathes: They cut metal that is often turning at fast speeds. CNC lathes are able to make fast ,precision cuts using Indexable tools and drills with complicated programs. Normally, they cannot be cut on manual lathes.They often include 12 tool holder sand coolant pumps to cut down on tool wear. Fig:11 CNC Grinders: Grinding metal process uses a coated wheel that slowly removes metal to create a part. Through the years, grinding was done on a manual machine, but with the advent of CNC technology, the grinding process has advanced . Fig:12 CNC DRILLING: Drilling is commonly used for mass production. The drilling machine (drilling press) is used to create or enlarge holes. The bench drill: For drilling holes through raw materials such as wood, plastic and metal The pillar drill: A larger version that stands upright on the floor.As the bench drill, it can be used to drill larger pieces of materials and produce bigger holes. Fig:13 CNC Boring: Process of enlarging an existing hole or internal cylindirical surface. This can be accomplished on a lathe or a machine tool specifically designed for the process, such as a horizontal boring machine. Fig:14 Electrical Discharge Machines (EDM): Wire EDM machines utilize a very thin wire (. 0008 to . 012in. ) as an electrode. The wire is stretched between diamond guides and carbide that conduct current to the wire and cuts the part like a band saw.Material is removed by the erosion caused by a spark that moves horizontally with the wire. Fig:15 Laser Cutting Machines: The machine utilizes an intense beam of focused laser light to cut the part. Material under the beam experiences a rapid rise in temperature and is vaporized. Laser cuts with a minimum of distortion, no mechanical cutting forces. Specific tools to perform different Operations: Fig:16Fig:17 CNC lathe machine tool turret is part of the CNC machine where all tooling is mounted. CNC lathe tool turret has an integral Disk like part (Tool turret disk) on which all the tools are mounted.CNC lathe tool turret is mounted on the x-axis carriage. Fig:18 Slant Bed CNC Lathe / Flat Bed CNC Lathe On some CNC lathe machines x-axis carriage with the tool turret is located behind the spindle (such cnc lathe machines are called  slant bed cnc lathe machines) and on other cnc lathe it is located at the front (as normal lathe machines) such cnc lathe machines are called  flat bed cnc lathe machine. T he below is a Slant Bed CNC Lathe Machine. Fig:19 Fig:20 CNC Lathe Tool Turret Tool Capacity: Tool capacity for cnc lathe machines varies machine to machine.Small CNC lathe machines normally comes with a tool turret capacity of 4 or 8 tools stations. Bigger and  heavy CNC lathe machines tool turrets are big and heavy and accordingly will hold more tools such as 12 or more. Fig:21 Tool Holder: Tool holder is the actual part which fastens   the tool to the cnc lathe tool turret Disk. Tool holder size also depends upon the cnc lathe tool turret size, heavy CNC late machine tool turret comes with with big bore for tool holders such as 50 mm diameter. For the small tool turret this might be 40 mm diameter or, less to suit the tool to hold.Fig:22 CNC Lathe Tool Turret Rotation CNC lathe tool turret rotates with the cnc program commands. Normally a letter â€Å"T† is used to call a tool in the working position. The tool rotation is dependent on cnc lathe machine. Some cnc lathe tool turret rotate in one direction (CW or CCW ). Some cnc lathe tool turret rotates both directions, such tool turret direction is optimized for the nearest tool station. Some cnc lathe give full control over tool call up, you can call by optimized direction or you can call tool by rotating tool turret by CW direction or CCW.Tool Offset in CNC Lathe with Fanuc Control Fig:23 There are variety of cnc machines in the market, and almost every cnc machine in a  cnc workshop  has different kind of cnc machine controls if controls are not different they might have different versions of the same cnc machine control. As the operating of different cnc machines controls is very much different from one another the same way  Tool Offsetting  is very much different. Here I will discuss the cnc tool measurement on Fanuc. Tool Offset Setting on Fanuc TCSome cnc machines has some kind of built-in mechanism of tool-offsetting, this built-in mechanisn of tool-offsetting makes adding new tool s are changing existing tools a breeze, because you just tie-up the tool in the tool-post on the  cnc machine tool-turret  and just perform the procedure the cnc machine manufacture has given in the cnc machine operating and setting manual. The  Fanuc  controls such as Fanuc TC has this capability, Just tie up tool in the tool turret and perform a simple procedure and everything is done. The tool offsetting procedure might be different from version to version, But on Fanuc TC this procedure is simple as under.For tool offsetting of a new tool just tie up the tool in the tool post and in  MDI (Manual Data Input) Mode  call up the tool in the working position by entering the command T1, the T is for tool call up and 1 is tool number if you have your tool on another position you might change that with that tool number. Now change the cnc machine to Jog Mode and touch the tool cutting point to the finished component (already gripped in cnc machine jaws) face and bring the To ol-Geometry page and enter under the tool number the command MZ0 this command will clear any previous values and will measure the current tool’s tool-offset in Z-axis.Now touch the tool to a  known-diameter  on the component and again in the tool-geometry page enter the command MX50 you can enter the measured diameter value instead of 50. This way now we have calculated the tool-measurement on the Fanuc TC cnc machine control. CNC Dry Run Invaluable Tool for CNC Setter: Fig:24 It shows the power and the flexibility the cnc machine manufacturers and cnc control manufacturers give a  cnc machine setter  by integrating the Dry Run  on cnc machines. On some cnc machines the Dry Run is added as a  CNC Machine Mode  like Fanuc.On Fanuc cnc control you just select the Dry Run mode and cnc machine is now in Dry Run Mode. Introduction of Dry Run for CNC Machines Setting a new component on a cnc machine is not an easy job. You have to go through many important tasks like cnc machine zero offsetting (cnc machine shift value setting),tool offsetting of tools  used on cnc machine etc. Now if you have completed these all tasks, now comes the time to run the cnc program for the first time, A really crucial and time consuming cnc task. A small negligence might be cause of an accident on cnc machine (tool breakage etc. . To make the first run easy and safe the cnc machine manufacturers and cnc control manufacturers provide us a way by which we can easily control the tools feed with  feed override. So now the cnc setter is a bit easy because he can now run all the tools with a  Safe Feed. Now cnc setter easily can lower the tool feed when he feels the tool is entering a bit danger zone, and easily can increase the tool feed (to a rapid feed) when the tool is away from the component (so the time not go wasted with lower feed when tool is away from component).In Dry Run all the cnc blocks whether those are starting with G00 or G01 and other  G-code  like G02/G03 run with the same feed, which is controlled through Feed Override. On Fanuc the feed override is controlled through  Handwheel  after feed override button press, and there also exists a Rapid Feed Button which if pressed during Dry Run Mode the cnc machine program block will run with Rapid Feed. One point must be cleared for Fanuc control is that feed override also works in  Auto Mode and Single Block Mode  but in such modes the feed override only controls G01/G02/G03 like G-code.But feed override will not control the G00 (Rapid Traverse). But in Dry Run Mode all the cnc program will run with the feed which is controlled through Feed Override. An introduction to cnc machine speed override and feed override controls and safety instructions which must be adhere to while working with cnc machine feed and speed override. CNC Machine Speed Override / Feed Override Introduction Normally you program the speed and feed this way, N10 G97 S1000 G95 F0. 3 Fig:25Now for on e reason or other you want to increase or decrease the speed or feed of the cnc machine  for some time, you definitely have a way to just alter the  cnc machine program, but there is one more suitable solution the Feed Override and Speed Override Controls. The feed override and speed override are  the most suitable and handy way to control the  cnc machine feed and speed through cnc control panel. You control the speed and feed in percentage. When the feed override  is 100% the actually feed  which is programmed will be active.But if the feed override  is 50% then the feed  will decrease by that ratio, now the machine tools will run with 50% of feed. So if you  have programmed 0. 5 mm/rev feed then with 100% the 0. 5 will be active, but for 50%  feed override the actually tool feed will be 0. 25 mm/rev. The same rule applies for speed override, for 100% the actual programmed speed will be active and spindle will revolve  with the actual programmed speed. But  at 50% speed  override the spindle speed will drop by 50%. Feed Override Speed Override Minimum Maximum Values: Normally you can control speed override and feed override from 0% to 120%.At 0% speed override the spindle will stop rotating, and at 0% feed override the tool will stop working ( the tool will be stationary ). No doubt  120% feed  override and speed override is just  safe. But some cnc machines give even more flexibility I  have worked on a cnc machine which has its feed override 0% to 200%. Normal cnc machine has just 0% to 120% feed  override and speed override. Speed Override and Feed Override Safety Precautions Whenever handling the speed override and feed override always think about safety, safety of yourself, tool, machine, component and your surroundings.Never try to use the speed override and feed override if you don’t need it. Because when cnc programs are made the speed and feed is properly set for the machined component. The increase in feed or speed might break insert or even tool. CNC Backlash CNC Troubleshooting, In this category we will see the cnc machine from a different view (cnc machine maintenance), your feedback will really matter, and I hope you will share you knowledge and experience. I will talk about the  CNC  Backlash  which is found in cnc machine axis. * what is cnc backlash, * cnc backlash causes, * when to worry about cnc backlash, how to measure backlash, * How to resolve and compensate cnc backlash through hardware and cnc control software. Fig:26 *What is CNC Backlash? CNC Backlash is any kind of play which is found in cnc machine axis. or you might say, CNC Backlash  is non-movement of the cnc axis which occurs on axis reversal. *Causes of CNC Backlash? This play (backlash) might be due to * Clearance which is kept in mechanical parts to reduce friction. * As mechanical parts get loose with time. * As with time mechanical parts keep moving and rubbing each other and after long time they l ose their actual shape and size. CNC Backlash Is already there A cnc machine axis move due to their  Lead Screw  and  Lead Screw Nut. There is always kept a very minor backlash in the lead screw and lead screw nut to reduce damage and wear. *CNC Backlash When to Worry It is good if your cnc machine axis backlash is near 0. 0001? but not always possible, so 0. 0003? to 0. 0004? is acceptable. But if the amount of play in the lead screw and nut crosses this limit then there is the time to worry, and call up you mechanical maintenance guys. CNC Backlash How to Measure?CNC machine backlash can be measure with a  Dial Indicator  attached to an Adjustable Stand. Put the stand on the cnc bed and direct the needle (plunger) of the dial indicator towards the axis which you want to measure. 1. Set the dial needle to 0. 0mm (zero). 2. Now move the axis in one direction 0. 5mm. Dial indicator should show 0. 5mm travel. 3. Now reverse the same axis 0. 5mm. If your dial indicator now go es back to 0. 0mm, then everything is okay. But otherwise, if on reversal the dial lags behind, then the amount the dial lags behind is the backlash.CNC Backlash How to Resolve? ( Backlash Compensation ) Now you have two choices the hardware way and software way to resolve cnc backlash. You first better choose the hardware way, because normally backlash is due to lead screw or lead screw nut wear, so better resolve the issue by tightening them a bit if they are loose than required, there are plenty of other hardware ways to cope with backlash. CNC controls also give us the ability to control (compensate) cnc backlash through their parameters. CNC Backlash Compensation through CNC Control Parameters How Much Successful?The better advice is that you resolve the issue by changing the lead screw (if possible) or lead screw nut, or just tightening them if they are loose might work, but otherwise CNC control parameters can be changed to compensate backlash, the cnc lathe machine I work on with fanuc control has the 0. 012mm set in its parameters as the backlash compensation for x-axis and z-axis. So such values can be changed to resolve the backlash issue. 10. DRILLING AND TAPPING ON CNC MACHINES Drilling is the operation of producing circular hole in the work-piece by using a rotating cutter called DRILL.The machine used for drilling is called drilling machine. The drilling operation can also be accomplished in lathe, in which the drill is held in tailstock and the work is held by the chuck. The most common drill used is the twist drill. Drilling Machine It is the simplest and accurate machine used in production shop. The work piece is held stationary ie. Clamped in position and the drill rotates to make a hole. Types 1) Based on construction: Portable, Sensitive, Radial, up-right, Gang, Multi-spindle 2) Based on Feed: Hand driven ,Power driven Components of drilling machine:Spindle The spindle holds the drill or cutting tools and revolves in a fixed position in a sleeve. Sleeve The sleeve or quill assembly does not revolve but may slide in its bearing in a direction parallel to its axis. When the sleeve carrying the spindle with a cutting tool is lowered, the cutting tool is fed into the work: and when it’s moved upward, the cutting tool is withdrawn from the work. Feed pressure applied to the sleeve by hand or power causes the revolving drill to cut its way into the work a fraction of an mm per revolution. ColumnThe column is cylindrical in shape and built rugged and solid. The column supports the head and the sleeve or quill assembly. Head The head of the drilling machine is composed of the sleeve, a spindle, an electric motor and feed mechanism. The head is bolted to the column. Worktable The worktable is supported on an arm mounted to the column. The worktable can be adjusted vertically to accommodate different heights of work or it can be swung completely out of the way. It may be tilted up to 90 degree in either direction, to al low long pieces to be end or angle drilled. BaseThe base of the drilling machine supports the entire machine and when bolted to the floor, provides for vibration-free operation and best machining accuracy. The top of the base is similar to the worktable and may be equipped with t- slot for mounting work too larger for the table. Hand Feed The hand- feed drilling machines are the simplest and most common type of drilling machines in use today. These are light duty machine that are operated by the operator, using a feed handled, so that the operator is able to â€Å"feel† the action of the cutting tool as it cuts through the work piece. These drilling machines can be bench or floor mounted.Power feed The power feed drilling machine are usually larger and heavier than the hand feed ones they are equipped with the ability to feed the cutting tool in to the work automatically, at preset depth of cut per revolution of the spindle these machines are used in maintenance for medium du ty work or the work that uses large drills that require power feed larger work pieces are usually clamped directly to the table or base using t –bolts and clamps by a small work places are held in a vise. A depth –stop mechanism is located on the head, near the spindle, to aid in drilling to a precise depth.Sensitive or Bench Drilling Machine * This type of drill machine is used for very light works. Fig. 1 illustrates the sketch of sensitive drilling machine. * The vertical column carries a swiveling table the height of which can be adjusted according to the work piece height. * The table can also be swung to any desired position. * At the top of the column there are two pulleys connected by a belt, one pulley is mounted on the motor shaft and other on the machine spindle. * Vertical movement to the spindle is given by the feed handle by the operator. * Operator senses the cutting action so sensitive drilling machine.Fig:27 Up-Right Drilling Machine * These are medium heavy duty machines. * It specifically differs from sensitive drill in its weight, rigidity, application of power feed and wider range of spindle speed. Fig. 2 shows the line sketch of up-right drilling machine. * This machine usually has a gear driven mechanism for different spindle speed and an automatic or power feed device. * Table can move vertically and radially. * Drill holes up to 50mm Fig:28 Radial Drilling Machine * It the largest and most versatile used for drilling medium to large and heavy work pieces. Radial drilling machine belong to power feed type. * The column and radial drilling machine supports the radial arm, drill head and motor. Fig. 3 shows the line sketch of radial drilling machine. * The radial arm slides up and down on the column with the help of elevating screw provided on the side of the column, which is driven by a motor. * The drill head is mounted on the radial arm and moves on the guide ways provided the radial arm can also be swiveled around the co lumn. * The drill head is equipped with a separate motor to drive the spindle, which carries the drill bit.A drill head may be moved on the arm manually or by power. * Feed can be either manual or automatic with reversal mechanism. Drill Materials The two most common types are 1. HSS drill- Low cost 2. Carbide- tipped drills – high production and in CNC machines Other types are: Solid Carbide drill, TiN coated drills, carbide coated masonry drills, parabolic drills, split point drill. Fig. 4 shows various types of drills. Drill fixed to the spindle Fig:30 Tool Nomenclature: Fig. 31 Nomenclature of twist drill Tool holding devices Fig. 7 and Fig. 8 shows the different work holding and drill drift device.The different methods used for holding drill in a drill spindle are * By directly fitting in the spindle hole. * By using drill sleeve * By using drill socket * By using drill chuck Fig:32 Drilling operations: Operations that can be performed in a drilling machine are * Drillin g * Reaming * Boring * Counter boring * Countersinking * Tapping Drilling: It is an operation by which holes are produced in solid metal by means of revolving tool called ‘Drill’. Fig. 9 shows the various operations on drilling machine. Reaming: Reaming is accurate way of sizing and finishing the pre-existing hole.Multi tooth cutting tool. Accuracy of 0. 005mm can be achieved. Boring: Boring is a process of enlarging an existing hole by a single point cutting tool. Boring operation is often preferred because we can correct hole size, or alignment and can produce smooth finish. Boring tool is held in the boring bar which has the shank. Accuracy of 0. 005mm can be achieved. Fig. 33 Various operations on drilling machine Counter Bore :- This operation uses a pilot to guide the cutting action to accommodate the heads of bolts. Fig. 10 illustrates the counter boring, countersunk and spot facing processes. Countersink:-Special angled cone shaped enlargement at the end of the hole to accommodate the screws. Cone angles of 60 °, 82 °, 90 °, 100 °, 110 °, 120 ° Fig. 34 Counter boring, countersunk and spot facing Drilling  machines are tools that have a rotating, cutting component at one end that bores holes into different materials. There are several types of  drilling  machines that may be used for a wide variety of purposes, including woodworking, construction,  masonry, metalworking, medicine, oil  drilling, and many other fields. Common drills include the hand drill, push drill, pistol-grip drill, hammer drill, and  drill press.In addition to making holes, drills are often used to push screws into wood, metal, plastic, rock, or composites. The hand drill and push drill are both manually operated  drilling  machines that have been largely replaced by power drills. A hand drill works by turning a crank that rotates gears, which cause the chuck to turn. The chuck is the component of the  drilling  machine  that holds the bit, or the end cutting piece. The push drill is a skinny tool resembling a screwdriver with a handle that can be pushed down on a threaded shaft, or a pole with helical ridging.As the handle is pushed down along threading, the shaft, chuck, and bit spins downward, much like pumping a toy metal top. Pistol-grip drills are the most commonly used  drilling  machines. These are corded electric drills that are typically shaped roughly like a pistol, with a trigger switch that starts a motor inside the drill. The motor causes the chuck and bit to spin in continuous revolutions. These drilling  machines may be used to make holes for bolts or other purposes, to push screws into wood, plastic, or other materials, and to bore countersinks.A  countersink  is a screw-shaped hole that is made before the screw is drilled in, preventing splintering or pulling of the plastic or wood around the head of the screw. A pistol-grip drill is also available in a battery-powered, cordless version , though they are usually more expensive. There are many different types of this drill and several indications for use. It is also possible to adapt the drill with an attachment, such as sanding or sawing components. A hammer drill, also called a rotary hammer, is similar to a pistol-grip drill, but also applies a punching motion to complement the rotational action of the bit.This hammering, forward force makes it useful for tougher materials, such as concrete or stone, that standard electric drills cannot cut through. For softer materials, however, the hammer drill may apply excessive force and a standard drill may be a better choice. A drill press is a type of drill that may stand on the floor or be mounted on a workbench. The base of the  machine  is bolted to the table or floor and a column rises up from the base to support the back of the head of the drill. The column also supports a table that can be adjusted in height between the head and the base.The spindle, a metal com ponent that holds the chuck and drill bit, extends downward from the front of the head, parallel to the column. A larger distance between the spindle and column allows wood with a larger width to be drilled. An â€Å"on† switch triggers the spindle to spin and levers attached to the head of the drill press move the spindle and chuck to move up or down. These  drilling  machines are suited for accurate  drilling, because the bit is fixed and the work can be secured to the table with clamps or a vise. ————————————————- Types Of Drill BitsDrill bits are tools used in making cylindrical holes. Various types of drill bits are designed for different uses. Drill bits are equipments or tools that are used in making cylindrical holes. Drill bits can also be referred to as a drilling machine. Drill bits are available in various drill types such as metal drills, gun dril ls, screw machine drills, core drills, step drills, spade drills, forstner drills, masonry drills, dental or surgical drills, wood bits, twist drills, drill blank taper drills and much more. They are designed to cut while doing a clockwise rotating motion. Several drill bits are coolant fed.They contain a channel or hole for directing the coolant fed near to the cutting edges. The split point drill heads of drill bits are used for chip clearance and for excellent centering. Drill bits can also be used in cutting aluminum, general-purpose metals, brass, copper, bronze, ceramic, and plastic, stainless steel, steel, wood, titanium and hardened materials. Various types of drill bits are designed for different uses. Listed below are some types of Drill Bits. Twist Drill: It drills holes in plastic, metal and wood. This drill is currently produced with a width covering a range from 0. 5 millimeters to 100 millimeters while its length is around 1000 millimeters. The most usual twist drill has a tip angle of 118 degrees. This is a proper angle for an extensive array of job. It also has a long series drill for extended length twist drills. It is not advisable to drill deep holes using this twist drill. Diamond Drill Bit: This particular drill is used in the bathroom for updating or remodeling. It is also used in redesigning your kitchen decoration. Furthermore, it is used on ceramic, glass, tile, limestone, stained glass, marble, fiberglass, porcelain, stone, slate and porcelain tile.When using this drill, the main concern is to obtain water at the edge of the drill bit. Drilling fiberglass may be done with or without water but make sure that the fiberglass has ample amount of water just to get the drill wet. Indexable Drill Bit: This provides an excellent performance in making short-hole drillings. Stainless steel is drilled 3x in diameter and only a short-hole must be done. Listed below are some other types of drill bits Adjustable Bit: This is built with a changeabl e cutter blade to bore holes of various sizes. It is also used for drilling gaps for wiring or piping.Around-the-corner bit: It is used to cut arched holes that are stretched in corners with a diagonal cutting surface. Auger Bits: This drill creates drill holes in wooden materials. The drill ends have a screw head so that the bits may be self fed. Brad-point drill: This drill looks almost the same as the usual bits but it has sharpened point to make wood drilling a lot easier. This drill has cleaner holes other than spade bits. Counterbore: The drill allows a screw to be driven under the wood outside. The holes that are drilled may be filled with a plug or wire.Drill Saw Bit: It is used to cut holes such as wood and metal and can enlarge current holes. Countersink: A drill that has an angled tip design that forms a â€Å"slump† in the screw head. Fly cutter: This one is often used to cut circles in wood and other soft metals. The diameter of circles may be adjusted by changin g the cutter blade setting. Hole saw: It cut holes from one to six centimeters in diameter and has a center bit for directing the cutting blade edge of the saw. Reamer bit: The tapered bit of reamer may be used on existing holes rather than to enlarge holes.Screw pilot bit: This beautiful bit is used for drilling body holes. A pilot hole is used along with the countersink. Wire Brushes: It use to remove rust and to clean up metal and is available either as a wheel or a cup with wire brush. Plastic bit: This is designed with a tip so as to prevent splintering when drilling plastic. It is important to reduce the speed and slowly drill the other side of the plastic. Plug cutter: Use this to remove cylindrical shapes from the wood. It covers the screw using a small cylindrical plate. Tapping:- Tapping is the process by which internal threads are formed.It is performed either by hand or by machine. Minor diameter of the thread is drilled and then tapping is done. Fig. 11 show the tapping processes. Fig. 35 Hand taps and tapping process using tap wrench Fig. 36 Various operations performed on drilling machine Work Holding Devices 1. Machine Table Vice: The machine vice is equipped with jaws which clamps the work piece. The vice can be bolted to the drilling table or the tail can be swung around swung around. Fig. 13 shows the standard and swivel vice. The swivel vice is a machine wise that can be swivel through 360 ° on a horizontal plane. Fig:37 1.Step Blocks These are built to allow height adjustment for mounting the drilling jobs and are used with strap clamps and long T-slot bolts. 2. Clamps These are small, portable vises , which bears against the work piece and holding devices. Common types of clamps are C-clamp, Parallel clamp, machine strap clamp, U-clamp etc.. Fig. 14 shows the correct and incorrect methods of mounting the work piece. Fig:38 11. APPLICATION OF CNC MACHINES ? cutting ? drilling ? milling ? welding ? boring ? bending ? spinning ? pinning ? gluing ? sewing ? routing Its application in some industries like -Automotive Industry Aerospace Industry -Machinery Industry -Electrical Industry -Instrumentation Industry Automotive Industry Different Products Fig:39 Aerospace Industry Aircraft Turbine Machined by 5-Axis CNC Milling Machine Fig:40 12. ADVANTAGES AND DISADVANTAGES OF CNC -Ease of Use ? CNC machines are easier for beginners ? Operation of several CNC machines at same time ? Some CNC machines don’t need any operator indeed call their operator in case of the emergencies. High Efficiency ? operate almost continuously 24 hours a day, 365 days a year. Expanding Options ? Expand the machine's capabilities with SoftwareChanges and updates. No Prototyping ? new programmers provide elimination build a prototype, save time and money. Precision ? Parts are identical to each other. Reduce Waste ? Reduce waste as errors allows minimize wasted Material. Disadvantage of CNC Machines Cost CNC machinery: ? costs quite a lot m ore than conventional machinery. ? Does not eliminate the need for expensive tools. ? Expensive to repair. 13. CONCLUSION CNC machines which are applicable any type of processing. manufacturing anything is identical in shorter time. CNC machines provide many advantages. Many industries prefer using CNC machines.