Master1 Essay

Psycholinguistics merges the fields of psychology and linguistics to study how people process language and how language use is related to underlying mental processes. Studies of children’s language acquisition and of second-language acquisition are psycholinguistic in nature. Psycholinguists work to develop models for how language is processed and understood, using evidence from studies of what happens when these processes go awry. They also study language disorders such as aphasia – impairment of the ability to se or comprehend words and dyslexia – impairment of the ability to make out written language. It is the study of interrelationship of psychological and linguistic behaviour. Its most important area of investigation has been language acquisition. It has raised and has partly answered questions such as how do children acquire their mother tongue? How do they grow up linguistically and learn to handle the registral and stylistic varieties of their mother tongue effectively? How much of the linguistic system that they ultimately command, are they born with and how much do they iscover on the basis of their exposure to that system? John D. Carroll states that this branch uses: â€Å"Some aspects of psychology and some aspects of linguistics. It is confined to the study of how people use a language system and how they learnt it† By language acquisition is meant the process whereby children achieve a fluent control of their native tongue. By 1950, people thought that children imitated their elders and got language but now various theories have been presented. Some argue that it is the environmental impact and product of our experience and others discuss the nnateness of language or Empiricist (Behaviorists) and Rationalists (Mentalists). The theoretical questions have focused on the issue of how we can account for the phenomenon of language development in children at all. Normal children have mastered most of the structures of their language by the age of five or six. The earlier behaviorist assumptions were that it was possible to explain language development largely in terms of imitation and reinforcement. Psycholinguistics therefore argue that imitation is not enough; it is not merely by mechanical repetition that children acquire language. They also acquire it by natural exposure. Both nature and nurture influence the acquisition of language in children. Both schools of thought have said significant things but neither is perfect. Language Acquisition is a process of analogy and application, nature and nurture. Experience and innateness. Imitation is there but the child forms his own grammar of rules. Children learn first not items but systems. In other words, what is being claimed is that the child’s brain contains certain innate characteristics which ‘pre-structure’ it in the direction of language learning. To enable these innate features to develop into adult competence, the child must be exposed to human language, i. e. it must be stimulated in proper to respond but the basis. David Crystal asserts: â€Å"On which it develops its linguistic abilities is not describable in behaviourist terms† Psycholinguistics nas researched and exposed that there is a critical period in first language acquisition. If the child, in the first thirteen years, is not exposed to language, he loses his critical period and then he can never master a language; even his native tongue. Genie and Chelsea ho lost their critical period, are the examples in this proof. If he is exposed to language in his childhood, he goes certain stages to learn his mother tongue. The development of a child’s language starts from babbling; merely saying /b/, [p/ and / m/ etc. and then he goes on to word level. His One-Word Stage is between the ages of 12 months, children are able to produce one word utterances. And the child can use one word to mean the whole thing as dada to mean I see daddy or daddy is coming etc. or Juice to means give me Juice etc. In Two-Word Stage: such as baby chair eaning the baby is sitting in the chair or babys chair etc. Hit Doggie meaning I hit the doggy etc. In Telegraphic Stage, children begin to produce longer and complex sentences such are chair broken, Car make noise, I good boy, man ride bus today etc. Language development from age 2 is rapid and fast. The telegraphic stage is a very important period which is characterized by the emergence of powerful grammatical devices. In short, Psycholinguistics deals with relationship between language and mind focusing mainly on how language is learnt, stored and occasionally lost. Mind and language have two functions: Acquisition and Performance and the two are linked. For empiricists, language learning is the result of conditioned behavior while Chomsky maintains that every human being has an innate capacity to learn his language. Language behavior is a very complex phenomenon. Language behavior is subject to different social and psychological factors. There is strong evidence to prove that language learning is a biologically controlled process. Psycholinguistics seeks to study all these issues and more.

The Right Way to Manage an Intervention

For 42 years, Libyans had suffered from the tyrannical dictator Muammar Gaddafi who ruled them without any mercy and allocated Libya’s wealth to his family and himself. On Tuesday 15th of February 2011, Libyans started to demonstrate against the regime of Gaddafi. However, Gaddafi’s response to these demonstrations was horrible. He ordered his forces to open fire on the protestors. According to reporters from the BBC â€Å"500 to 700 people were killed† during February 2011 by Gaddafi’s security forces. Libyans did not give up, though. Instead, the number of demonstrators increased day by day, especially in the city of Benghazi where the demonstrators were armed. They forced the police and the army forces to withdraw from Benghazi. For a person like Gaddafi, who ruled Libya for more than 40 years, resignation was not an option. He was willing to eliminate the revolution against him no matter how. He gathered his army around the cities which the demonstrators controlled and was about to commit massacres against Libyans. The United Nations had to do something to prevent the massacres Gaddafi’s forces were about to commit. On March 2011, the UN started an intervention in Libya by imposing a no-fly zone over Libya to prevent Gaddafi’s air forces from killing civilians. This intervention -which was later led by NATO (North Atlantic Treaty Organization) – proved later that it was the best way to end the conflicts in Libya. The three main reasons behind this statement are firstly, to protect Libyans from the Gaddafi’s crime. Secondly, because the intervention was not a direct invasion. And finally, because the intervention was done after the UN approval. The most important reason why the NATO’s intervention was the best solution in the war in Libya is because Libyans needed urgent military help to stop Gaddafi’s forces from killing civilians. If NATO’s navy in the Mediterranean had not imposed a no-fly zone over Libya Gaddafi’s air forces were about to attack civilians in Benghazi and other cities. The Libyan Representative to the UN, Ambassador Ibrahim Dabbashi, said in a press conference on March 2011, â€Å"We are expecting a real genocide in Tripoli. The airplanes are still bringing mercenaries to the airports. We are calling on the UN to impose a no-fly zone on all Tripoli to cut off all supplies of arms and mercenaries to the regime†. In other words, NATO’s intervention saved thousands of lives by applying a no-fly zone over Libya. No peaceful solutions would do so, especially since Gaddafi seemed insistent on proceeding in his bloody actions against his oppositions. Another reason why NATO’s intervention in Libya was a model one is because it was not a direct invasion. The NATO’s operations in Libya were all by launching air and missile strikes against important targets on Gaddafi’s forces. Ivo H. Daalder, the U. S. Permanent Representative to NATO, indicated that the NATO’s operations in Libya were successful by any standard. The operations â€Å"saved† tens of thousands of lives from almost certain massacre. These operations greatly â€Å"minimized† direct damage. It helped the â€Å"Libyan opposition† to overthrow one of the world’s worst â€Å"dictators†. All these accomplishments were done without any wounded from the allies and with the cost of only several billions of dollars. That was a â€Å"fraction† of that spent in previous â€Å"interventions in Balkans, Afghanistan, and Iraq. In other words, NATO played a huge role in ending a civil war which could last for many years by the least damage possible. The proof of that statement is what happening in Syria today. As no military force intervened to end the bloody war in Syria, the conflicting parties have been killing tens of thousands of civilians for more than two years now. Political ways are not helpful in such situation. If NATO hadn’t intervened in Libya, the civil war could not be finish till today, or at least it could cause much more victims. The third reason to consider the NATO’s intervention a successful one is because it was applied after the UN approval. The military operations were led by a group of allies, and then these operations were led by NATO, which is still a group of allies. This gave legitimacy to the intervention and proved that the intervention was only to save the Libyan people and help them get their freedom, not for the interests of a specific country. Moreover, NATO ended their operations after the death of Gaddafi. Ending their mission is a clear proof that they were not planning to invade Libya. But they were applying the UN solution to save civilians. A report published on the United Nations official website on 17th of March 2011 clarified that the Security Council â€Å"authorized† the use of force in Libya to protect Civilians from Gaddafi’s forces, especially in the city of Benghazi, â€Å"Acting under Chapter VII of the UN Charter†, which allows to take military and nonmilitary actions to restore â€Å"international peace and security†. In other words, there is no proof that the NATO intervened in Libya for any kind of benefits. Even on the economical perspective, the cost of the military operations is a small fraction compared to the wealth of Libya which was stolen by Gaddafi and his family. Despite the obvious success of NATO’s interventions, there are critics who believe that NATO’s intervention was not helpful. The author of the essay â€Å"The Negative Influence of NATO Intervention in Libya† claimed that the NATO’s intervention that happened in Libya was not helpful. He based his thesis on three main reasons. The first one is because NATO neglected Libyan people. Secondly, because NATO killed innocent people through bombing. Finally, because NATO caused internal conflicts for Libyan people. The author mentioned some good examples to prove that the intervention was not helpful. However, His essay has three unconvincing arguments. The first one is that the author claimed that NATO neglected Libyans basing this claim on one example. That is considered as a hasty generalization. The second unconvincing argument is claiming that the main objective of the intervention was to conquer Libya without mentioning logical evidence. The last weakness in the essay is the last paragraph; the author claimed that NATO motivated Libyans to fight against each other. In the first paragraph, the author of â€Å"The Negative Influence of NATO Intervention in Libya† concluded that NATO neglected Libyans. He based this point on the fact that a boat carrying refugees sank in the Mediterranean Sea and NATO didn’t rescue the refugees. However, this example is not convincing to claim that NATO neglected Libyans because it’s a hasty generalization. Moreover, the author based this example on a person called JOHN-MARK IYI without mentioning his position or how he is related to the topic. On the other hand, there are a lot of proofs that NATO saved Libyans. According to the BBC NATO Secretary General Anders Fogh Rasmussen said after announcing the end of their mission in Libya, â€Å"NATO's military forces had prevented a massacre and saved countless lives. † He also said,† We created the conditions for the people of Libya to determine their own future. † There is no doubt that NATO has hurt Libyans to some extent, but this damage was a fraction to the one caused by Gaddafi’s forces. Claiming that NATO’s objective was to conquer Libya is the second unconvincing point in Hijazi’s essay. A clear proof that NATO’s operation was not to conquer Libya is that they announced the end of the mission on the 31st of October 2011 after the end of Gaddafi’s regime. If NATO had any interests in conquering Libya they would not end the military operations in Libya. Moreover, Hijazi mentioned that NATO’s airstrikes killed a lot of civilians and destroyed a lot of houses without supporting his claim with clear evidence that the people killed were civilians. Especially that Gaddafi’s army used to hide inside civilians houses, which makes it hard to specify whether the killed people were civilians or soldiers from Gaddafi’s army. In other words, the points mentioned by the author don’t prove that NATO intended to conquer Libya. The last unconvincing point in Hijazi’s essay is claiming that NATO motivated Libyans to start a civil war. That claim is not logical for several reasons. Firstly, the war started before any foreign intervention in Libya and the main cause of this war is to overthrow the Gaddafi’s regime. Secondly, Hijazi didn’t mention how NATO could get any benefits if a civil war started in Libya. And most importantly, Gaddafi’s soldiers were not Libyan which means it was not a civil war. Martin Chulov and David Smith published an article in The Guardian website, they say,† Many black Africans have been arrested and accused of fighting for dictator, but claim they were press-ganged. † In other words, it’s true that NATO participated in the war in Libya, but claiming that they started the war there is not convincing. To sum it all up, the war in Libya caused the death for a lot of Innocent civilians. Without the involvement of NATO, the war would be running until today, causing the death of innocents every single day. Because simply, there was no other clear, political solution would work with the insanity of Gaddafi. For sure, the intervention of NATO was not a perfect choice. However, it was the one with least damage. Moreover, today Libya seems to heel slowly form the war it had, and fortunately it seems that the NATO intervention had no dangerous impacts on Libya. In general, it’s possible to say that sometimes the only way to end violence is to use violence.

Every Text Has Its Use By Date Essay

I think the idea of every text having a use by date is incorrect and I will therefore argue against the topic. There are a few things which can help to keep texts from ever having their use by date and as a result proving my argument. For example, texts, such as Macbeth, can always be changed slightly and interpreted differently to make them interesting time and time again, for old and new audiences. Also, just because a text was written a long period of time ago doesn’t mean that it still won’t be interesting, as the events and themes in it can still be relevant to the current time and its happenings. One of the main reasons that proves that texts don’t have a use by date is the fact that an older text can involve events or ideas that are relevant to modern audiences’ daily lives. Some of the ideas explored in Macbeth are ambition, guilt, greed, cruelty, hostilities between good and evil, the rule of leader, the purpose of human existence and supernatural happenings. These all tie in with peoples every day life. For example, ambition was a major factor in Macbeth and plays an important role in practically everyone’s daily life. In Macbeth it was ambition that drove Macbeth to commit the acts that he did and in modern times business is becoming more and more competitive in today’s society so as a result ambition, and its destructive nature, becomes more of an issue. Also, the idea of hostilities between good and evil, order and disorder and the rule of a leader, which are major components of Macbeth, are relevant to the military action in the Iraq War which has affected a lot of the world. These and other ideas interest people from all time periods as some, if not all, of these ideas will affect them. Another main reason that shows a text doesn’t have a use by date is the fact that they can always be appropriated. Appropriation is when something old is turned into something new. In this case it would be taking an old text and changing it to suit a modern audience, usually by making a film version. For example, in one instance the Shakespearean text â€Å"Romeo and Juliet† was turned into a movie that used only the plot of the original text and used the settings of modern life and a modern script which allowed the audience to relate to more to the film. This is a perfect example of the fact that a text which is hundreds of years old can still be entertaining. When a movie is appropriated it can appeal to a wider audience, as not everyone likes or understands the style of writing used to write the original text. If texts are appropriated in this way they will continue to entertain audiences and as a result, never end up having a use by date. A film version of an older text, especially a Shakespearean one, can be very effective in delivering the original to text to a wider audience. A film version makes the text easier for the audience to understand as it provides visual images to help them realize what’s actually going on and what the characters are saying, as a lot of people wouldn’t fully understand what was being said when the old English style of writing, that Shakespeare uses, is used. New interpretations also help to keep texts and their film versions interesting to new audiences and audiences that have seen it before. In Polanski’s version of Macbeth Polanski decided to add a scene, which wasn’t in the original text, into the movie. He also changed the way things happened in some of the scenes, for example, when Macbeth returns to the witches, instead of the apparitions appearing he sees completely different visions that give him warnings and predictions. Another reason to further show that texts don’t have a use by date is the point that just because a text is old doesn’t mean it’s not entertaining or interesting to modern readers. Texts such as Macbeth and many other of Shakespeare’s plays are still regarded as some of the best plays ever written even though they were written hundreds of years ago. In some cases, audiences may find these texts interesting and entertaining because they’re written in an old style of English which is no longer used. When this is the case it clearly shows that the idea of texts having a use by date as incorrect. In conclusion, I think that the points presented sufficiently prove that well written texts do not have a use by date. If a text is well written it will continue to be valued no matter how old it is. Especially due to the fact that, just because a text is old doesn’t mean it’s no longer interesting to modern audiences.

Is commercial surveilliance in the UK effectively monitored and Essay

Is commercial surveilliance in the UK effectively monitored and regulated by the Security Industry Authority - Essay Example he local private security industry including a long list of approving licences to companies such as security guards, vehicle immobilisers, the key holders, private investigators and the security consultants including the licensing of manned guarding which includes cash and valuables in transit, close protection, door supervision, public space Close Circuit Television (CCTV) systems, and security guard. (Security Industry Authority, 2007) According to Sir Digby Jones, the Director-General of the CBI, the â€Å"Security Industry Authority will bring us a better regulated and professional private security services throughout the country as it welcomes the introduction of a new standards in the security industry†. (SIA and CBI, 2005: 2) Based on a recent survey on 500 British companies in 2005, almost 25% never spend money on security devices and 49% did not bother to come up with a contingency plan in case of serious crimes or other related activities that may harm the normal functioning of the business. (Culver, 2005) CCTV Operators came into effect all over England and Wales. (SIA, 2007b) With the new Security Industry Authority vision1, it is possible to reduce the incidence of crime, promote peace and disorder, as well as eliminate the fear caused by criminal acts throughout the United Kingdom. For the purpose of the study, the researcher has stated the research proposal as â€Å"to determine whether the commercial surveillance in UK, particularly the licensing of the heavily promoted of CCTV installations, is really effectively being monitored and strictly regulated by the Security Industry Authority or not† by conducting an intensive up-to-date literature review. Based on the research proposal, the researcher will define a list of specific research questions that are directly or indirectly related to the research proposal. Aside from the literature review, the researcher aims to conduct a separate research proposal by using related survey questionnaires. These

Critical research and individualism Coursework Example | Topics and Well Written Essays - 1250 words

Critical research and individualism - Coursework Example The field of nursing research helps in integrating the various aspects of patient care including biological, social, emotional, as well as scientific and philosophical that have a direct and far-reaching impact on the provision of healthcare. The recent developments in the field of nursing science play a key role in influencing and shaping the discipline of nursing through a range of philosophical approaches. This essay aims to assess the various philosophical underpinnings of this profession, the implications of nursing theories in practice, and a critical analysis of various competing theories of scientific method, particularly the critical theory and the concept of individualism. Critical social theory: The critical social theory has been recently gaining increasing significance in the field of nursing science due to its philosophical approach towards understanding of science. The concept of individual liberty is somewhat restricted in contemporary society due to a range of socio- political restrictions. Such restrictive policies which are rampant across all sections of the society tend to have various negative implications on individuals due to its dominant presence as an integral element of the societal structure resulting in oppression of individual expression. The critical analysis of a given situation helps in highlighting the issue of oppression and the socially constructed borders on human freedom. The critical social theory helps in understanding the manner in which the dominant social values affect and influence the profession of nursing and subsequently the health and welfare of the society at large (Munhall, 2011). The critical social theory is hence involved in transforming existing social orders with a view to influence and coax a positive change in the social norms and hence the power relations to enable greater freedom and promote the greater social and moral values of equality, freedom, and justice (Hitchcock, Schubert, and Thomas, 2003). The field of nursing, being a 'practice science', is essentially involved in pursuing the primary goal of nursing inquiry and knowledge development in order to enable informed decision making and application of the same in practice in ways which are both - socially relevant as well as scientifically sound (Browne, 2000). This theory plays a key role in elucidating the relationship between theory and practice. It insists that the relationship between nursing theory and practice is reflexive in nature thus implying that 'theory feeds into practice, and practice informs theory' (Daly, Speedy, and Jackson, 2009: 116). According to Mill, Allen, and Morrow (2001) critical theory has the ability to "provide the broad philosophical foundation required by the discipline of nursing" (p. 112). The potential contributions of critical social theory in the field of nursing as well as its philosophical implications are fundamental to the field of nursing and healthcare delivery in general. The applica tion of critical social theory has been widely recommended by various nursing theorists for specific research, as a guide to nursing research and to use as a framework for developing the discipline. According to Habermas (1968 qtd. in Browne, 2000) "critically oriented science should produce emancipatory knowledge that promotes social change and a more just society" (Browne, 2000: 40). Individualism: Individualism is one of the most basic foundations on which

Management accounting Essay Example | Topics and Well Written Essays - 1500 words - 16

Management accounting - Essay Example e of the company to be enhanced the market has to be assessed which would involve trying to find out its customer preferences; this is done with the aim of trying to stabilize the sales, which has been fluctuating since the year 2008 to date. The growth in total assets may also be because of poor circulation of inventory, which is not healthy for the operations of the business. This report will further asses the ways that the company needs to employ its differentiation strategy apart from simply having large stocks for the sake of increasing prices, timely delivery and long lead times (Bates, Greenwald & Morrissey 2009). The company needs its inventory to move hence the main strategy is to expand its operations in terms of employing qualified personnel, look for incentives to control employee turnover and modernize its operations. As it stands, the company operates its operations in a very crude way, which has to stop by way of formulating organizational procedures and clear manageme nt structures. Bond Motorhomes a company that was formed in 1973 to repair and motor homes and caravans decided to expand its business in the year 2000 and into conversion of vans into motor homes as another way of doing their business. In terms of capacity and operations, the company did not change significantly, as it is reported that it maintained the repairs department, which was the pioneer to act as an attraction to customers. As a result, of this plus other factors the company performance in terms of sales turnover has been fluctuating a lot. The company has a major issue concerning maintaining its employees due to unclear employee management structures. It is true and understandable that the company still has small operations and it is a fact that the company has prospects of growth (Baxter & MacLeod 2008). This calls for the management to streamline all the operations of the company, formulate a plan of action, enact ways of recruiting employees and devise a way of recruiting

SOCIAL MEDIA CAMPAIGN Essay Example | Topics and Well Written Essays - 500 words

SOCIAL MEDIA CAMPAIGN - Essay Example Before creating an effective campaign, you need to understand people or the customers that you are trying to reach. This Understanding needs to go beyond the common demographic information, and that is in terms of education age and gender. For instance, by implementing thoughtful an effective social media campaign, try to adopt the latest media site so as to reach a lot of people. Always the desire to promote a one on one talk should be there (creative, retrieved on March 3, 2015). Social media is all about engaging and participating, monitoring and listening and then pushing forward to achieve your goal. Having a plan, the next thing is to create the content. Social media competition is all about the content of the product or service given. Great content is achieved through understanding your space on the social media and uncovering trends. Finally, be clear in order to offer a fresh perspective too. This will promote the business and intern raise your ranking on the site. With the content at hand, there will be a need to determine where the content will be on the site. Position of the content on the site helps customer know where to find what they need. URL, title tag, the writers of content are just but the example of what customer will find there. With the three steps above; you will need to spread or have an advertisement of it. Creating optimal is achieved by making sure that the information is shared quickly with a click of a button. A repacked message being at the fingertips, it will be easy for someone to share the information with a friend but only if the information is relevant, interesting and exciting. It is time for the content you have to get the promotion in this section. The main goal here is to build links that will promote directly the new content rather than linking directly to the sites homepage. It can be achieved by announcing the content on the social sites and promoting the it via social media and finally posting a

Womens Crisis Services of Waterloo Region Organization Essay

Womens Crisis Services of Waterloo Region Organization - Essay Example This paper illustrates that Haven and Anselma were functioning independently up until 2001 when they merged to form the present Women’s Crisis Services of Waterloo Region (WCSWR). This also resulted in the integration of the board of directors and the creation of the post of the executive director who has the responsibility of managing the two facilities. The adoption of a dragonfly as its logo reflects the organizations’ literal shift from violence against women and children. The tagline â€Å"Moving beyond violence† is an enhancement of the message that achievement of equality is determined by human courage and initiative to propagate human values and leave violence against women in the past. Among its services is the residential program that serves women above the age of 16 either with or without children. These women include those who are being abused intimately or experiencing problems in a domestic relationship. The organization also has the outreach and ed ucation services that work closely with the process of transitioning women to independence, and also those seeking assistance from their current abusive situations. The education program functions to provide the community and professionals with the required information on healthy relationships. Therefore, they are guided by the fact that there should be synergistic efforts towards achieving a better world without violence against women with a mission of providing shelter, education and public sensitization to all the abused women and children. Therefore, it has grown to become the subsequent vision that any form of aggression against women and children will not be tolerated by society. The organization’s central contributions lie in the empowerment of women against this vice in the advent of calls for equality among males and females. This organization is also playing a fundamental part in refining the community regarding the costs of domestic violence and the benefits of avo iding it. It is also playing a significant role in creating conflict resolutions and ways to avoid the emergence of these conflicts. In another word, it means that the organization is working on the creation, sustainability and dissemination of peace in homes hence alleviating this problem of violence that is directed by men towards women.

Poetry explication Essay Example | Topics and Well Written Essays - 750 words

Poetry explication - Essay Example War will not be without death or defeat. And the poem describes how sorrowful it is, that even if there is victory in war, there is no victory over death. For in war, there is violence and in violence there is death. The tone of the poem expresses sorrow and regret. Although the drums beat in victory, the drums also beats sorrow for the passing of the honorable men who sacrificed their very lives in order to gain victory in war. It is but sad for their families and comrades. Although everyone knows how difficult war can be in the end, there are still people willing to sacrifice themselves for the victory of their party. And with this, although there is victory, the family and friends of the passing comrades will always be a shadow of defeat. Yes, they are honored. Yes, the party thanks them for their sacrifice and their hand in victory. But never can they be brought back by the honor that is being given to them. The speaker of the poem tells the sad story of how he witnessed the fune ral procession of the war veterans. He is particularly struck by the fall of the father and son. With this, he begins to question the war, its purpose and its victory. He begins to lose his will to fight and his thirst for victory. He does not feel the passion soldiers feel when they begin fighting, but he feels the burden of guilt that he is still alive when there are a lot of his friends and comrades that have fallen. He feels the sorrow of the families who lost brothers, fathers and sons. And with this, he creates a picture of unfulfillment is disillusion from the war. Although they have gained the victory that they have fought hard for some time, he only felt the pain of being left while so many of his comrades are dead. Although there are drumbeats indicating victory, the drumbeats for him represent the loss that he has seen, felt and encountered during the period of war. He cannot move on so easily, and he cannot rejoice over their victory because all he sees is death all arou nd him. The picture created in the poem, where the moon shines over the procession indicates a sorrowful event despite a victorious winning. It shows that despite the victory, behind the pounding of drums indicating expressions of honor for the dead, there is still a darkness that covers the entire army. Yes, after darkness, there is light, but in this scenario, the speaker cannot find the hope of coming day but he wallows in the darkness of the bright yet ghastly moon. The moon represents how things may seem bright but it is only illuminated by the sun, when one cannot see the sun. In war, the death of the soldiers may be shown as honorable deaths, but it is a dark event, only illuminated by the thoughts of the entire army celebrating success. With the moon shining, the speaker begins to really that even if it is only illuminated by the absent sun, it is still steadfast and strong. With this, he begins to realize what he can for the dead and dying. He begins to let them go, and off er them the only gift he can give them with their deaths, that is his love and the thoughts of being able to gain victory. This indicates how soldiers can still move on while they see comrades die beside them. They gain strength with their deaths, pushing for victory, pushing for the win. Their comrades’ death is like the moon, it gives them the strength as the moon gives the nighttime some illumination. War will never be without sorrow. It is the twin sister of war. Death is always part of the war, and the only way the soldiers will be able to

Middle east and international relation Essay Example | Topics and Well Written Essays - 1750 words

Middle east and international relation - Essay Example that substantially ‘oils’ the world since large volumes of crude oil, a key source of energy for human global use, are mined in this region (Ismael p.183). As a result of its strategic position and numerous reserves for petroleum resources, Middle East has evolved as one of the most critical regions of contemporary world. In terms of political stability, Middle East has not been lucky as most nations of the region experience unstable political environment, an opportunity that has been exploited by superpower nations as they fight it out to gain advantage in the region (Ismael p.183). Economically, this is a region characterized by poor economic record for almost the previous two centuries. Compared to other western countries, the region’s per capita income is seen to be less than a third of per capita income in most of the advanced nations and life expectancy is almost eight years lesser (Kuran p.1). On overall, major nations of the region are characterized as poor performers economically (Kuran p.1). One theory that still remains disputed for providing reasons for underdevelopment of the region postulate that Islam ‘inhibits’ economic development of the region through its ‘culturally insensitive’ aspects such as â€Å"fatalism, personalism, laziness, lack of curiosity, mistrust of science, superstition, conservatism and traditionalism† (Timur p.2). Therefore, the essence of this paper is to look at issues of Middle East as it influences international relations. Israel-Palestine conflict is an issue that cannot be resolved today, tomorrow or the day after. It is a hot issue that both sides backed by their various international allies have approached with particular definite positions hardening every day. The problem originates from events of 29th November 1947 when the United Nations’ General Assembly passed a resolution to partition Palestine into two countries one occupied by Jewish and another occupied by Arab (Karsh p.8). Jerusalem was to

Reflection on clinical simulation Essay Example | Topics and Well Written Essays - 500 words

Reflection on clinical simulation - Essay Example The patient situation we are going to analyse involves a patient who was diabetic under observation as shown below using the 5 R’s. Reporting: This patient’s blood sugar level was at 16mmol and he was on an insulin infusion with an hourly observation for his blood sugar levels. He also had a naso-gastric tube in place with blood pressure under a two hourly observation routine and he was due for an x-ray on that specific day at 2 p.m. When dealing with the patient he was not feeling and in pain, his naso-gastric tube was not in place. As a result, we should have attended to the patient immediately as instructed by the doctor which unfortunately we did not. Responding: Our first duty was to respond to the patients needs and I being in charge of the other nurses should have advocated for response to be undertaken immediately. We should have administered the normal saline dose immediately and stayed with the patient and give support to reduce anxiety. Anxiety is usually known for heightening pain and staying with the patient while relieving and stroking him would assist in relieving the pain since distraction assists in reducing pain (McGuire 86). Relating: Due to my experience as a healthcare professional, I should have been able to relate pain and psychological experience caused by anxiety. I would have applied a stop gap measure for the pain. Apart from administering drugs, I would have made the patient comfortable and re-assured him that the pain would go away soon. Since these non-pharmacological interventions are effective in relieving pain compared to the use of drugs (Lester 89). Reasoning: Based on this situation, the ultimate goal was for us to relieve pain and prepare the patient for an x-ray. Therefore, the best practice would have been to make use of painkillers and administer insulin and monitor his vital signs. In this case, monitoring blood sugar level and pressure while at the same time checking on the patient’s pain

Prevention of teen pregnancy Essay Example for Free

Prevention of teen pregnancy Essay Explain the level of prevention with teen pregnancy (can choose your own level out of the three levels).   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Teenage pregnancy has been a major problem not only in the developed world but also recently in the developing nations.   In the US and Canada, due to the increased awareness amongst teenagers, the prevalence of teenage pregnancies is decreasing.   However, in several developing nations, the incidence of teenage pregnancies is on the rise.   In the year 1999, it was found that about 97 teenagers out of every 1000 between the ages of 15 to 19 years were pregnant and about 80 % of them were not desired.    Before the age of 18 years, 80 % of the teenage girls have sex.   The age of menarche has also dropped to 12 to 13 years (Weiss, 2000).   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Teenage pregnancies may not be intended for social reasons but due to other including medical and psychological.   The chances of the girl to have a miscarriage, abortion, stillborn baby, etc, are reasonable higher.   These girls are usually the ones who belong to the lower socioeconomic groups and the chances of living in poverty are realistically higher.   The financial burden on the woman would also increase, as she would now have to leave her studies and pick up some job in order to support her child.   Children born from a teen mother are frequently underweight and are at a high risk of developing health problems.   Due to a number of causes, it is always preferred that teenage pregnancies are prevented.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   There are three different levels of prevention when it comes to teenage pregnancies.   These include primary prevention, secondary prevention and tertiary prevention.   Primary prevention includes measures to prevent pregnancies through physical or other methods.   These include use of contraceptive pills, condoms, etc.   This helps to reduce minimize the risk of getting pregnant.   Secondary prevention includes checkups, scans, etc, to ensure that the girl does not get pregnant.   This is usually followed if primary prevention is not enabled.   Tertiary prevention of includes taking measures to prevent any further pregnancies after one has already occurred in the teenage girls.   The best level of prevention would be primary prevention (Connelly Inui, 2004).  Ã‚               How might this specific level of prevention be addressed in a community experiencing an increase in family violence.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   There are several measures which need to be adopted for primary prevention of teenage pregnancies.   These include health education, sex education, school and college based programs, health services, use of condoms, use of contraceptives (birth control pills), etc.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   In the teen pregnancy prevention program several people belonging to the community should be involved including the teenagers, parents, teachers, legislatures, administrators, professionals, media, medical professionals, School authorities, etc.   It is important that the entire community be involved in the program, as teenage pregnancy is a multi-faceted issue.   People are advised to develop responsible health attitudes, behavior and practices regarding teenage pregnancy.  Ã‚   The program should be much more than just offering health services and counselling services.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The program should take place at several places including schools, colleges, health centers, public health centers, community discussions, etc.   The targets of such programs should be more realistic and achievable.   Both the boy and girl should actively take part in such programs.   At all stages, it is very important that the family and the parents are involved.   Besides, resources and materials such as condoms, birth control pills, education material, counselling services, etc, should be provided.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   In the teenage pregnancy prevention program, multiple agencies should be involved.   In the planning and implementation of the program, teenagers themselves should be involved.   The parents should educate and create awareness in their children about sex and pregnancy during the childhood stage itself.   Hence, involvement of the parents is also required.   Mobile services would also help to create awareness in rural and far-flung areas.   The trust should be in creating increased levels of confidence, self-esteem and decision-making amongst teenagers.   Teenagers should also be educated about drug abuse and alcohol abuse.   Drug abuse can affect judgment, which can lead to irresponsible sex behavior. Explain why a comprehensive health program should address all three levels of prevention.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Teenage pregnancy programs need to address all the levels of prevention, as focusing on one single level of prevention and ignoring others would create bias and negative attitudes of the community to those girls who have already become pregnant.   As the rates of teenage pregnancy are reasonable high and a significant number of girls become pregnant during the teenage period, there are high chances that they would lead a miserable life.   This may make it all that more difficult to enable the process of primary prevention.   Several facilities such as health education, medical services for the mother and the child, housing, financial support, nursing homes, counselling, etc, need to be provided.   It is important that teenagers who become pregnant be given all the care and love during the pregnancy period and not be driven out of the house.   Pregnant girls should also be given counselling services as they would not know much of the manner in which their healthcare needs have to be met.   They should be specifically warned about drug abuse and smoking during this period. The focus should be on ensuring that the mother and child are healthy and do not suffer.   During the pregnancy period, the young father should be supportive of the girl.   The young mother should also be educated about the manner in which abuse and neglect need to be tackled. References: Connelly, M. T. Inui, T. S. (2004). â€Å"Principles of Disease Prevention.† In: Braunwald, E., Fauci, A. S., Kasper, D. L., Hauser, S. L., Longo, D. L. and Jameson, J.L. (Eds) Harrison’s Principles of Internal Medicine, New York: McGraw-Hill. Huberman, B. (2005). â€Å"National Teen Pregnancy Prevention Month (NTPPM) Planning Guidebook.† Retrieved on December 9, 2007, from Advocates of Youth Web site. Ontarios Maternal, Newborn and Early Child Development Resource Centre and the Sex Information and Education Council of Canada (2007). â€Å"Update report on Teen pregnancy prevention.† Retrieved on December 9, 2007, from OMNECD Web site: SHPPS (2006). â€Å"Pregnancy Prevention.† Retrieved on December 9, 2007, from SHPPS Web site. Weiss, D. (2006). â€Å"Reducing Teenage Pregnancy.† Retrieved on December 9, 2007, from Planned Parenthood Web site: http://www.plannedparenthood.org/news-articles-press/politics-policy-issues/teen-pregnancy-sex-education/teenage-pregnancy-6240.htm

Milling machines: An introduction

Milling machines: An introduction Chapter I 1.1 Introduction The ability of any nation to manufacture is essential but to deploy that ability in a certain nation is the trick as every nation defers from one another, so in order to enhance Arab nation ability to manufacture we will provide a better cheaper design for a CNC milling machine. The Primary Objective of This Project is to present and develop a prototype for a substitution of the expensive hard to acquire machining facility for the Middle East industrial society; these machining facilities include the regular Turning, Drilling, Shaping, Milling, and Grinding Machines. Our primary survey concluded that there always must be a turning machine beside a milling machine, but a milling machine (CNC milling machine) can include the rest of processes required within its operation to a good degree and the turning operation to an acceptable degree. So we chose the milling machine as our initial model to undergo our optimization plan. Therefore our Primary objective of choice is to Design a Basic Three Axis CNC milling machine. Also to manufacture a working Prototype for this machine fabricated all with nationally available components in order to minimize its cost but maintains an acceptable level of accuracy to suite a Computer Numerical Control Machine. Another Thing that we must point out is that in order to accomplish this project we need more than one trial to find the suitable combination of components and specs to pursue in order that this machine comes to light. 1.2 Proposed Approach A new approach is needed that approach is based upon the 2010-2015 World Outlook for Computer Numerical Controls [1]. The results of that survey were mainly based upon word wide research includes Middle East and North Africa. These results showed that any machine tool required for the Egyptian industrial society could be one of the following: Turning, Drilling, Shaping, Milling, and Grinding. So the first step was to pick up the operation over which this thesis will focus on. Milling can include in its operation: Drilling, Shaping, and Grinding. And might contain Turning under certain conditions. So milling was chosen. And this result might be verified by the fact that 90% of the working machine tools in the field of traditional CNC machines are either Milling or Turning Centers. Now we will compare different configuration of milling machines Case 1: A Universal Milling Machine. Case 2: A regular CNC Milling Machine. Case 3: Gantry style CNC Milling Machine. Case 1: A Universal Milling Machine From Cost point of view: Cost is high because of the usage of large material to build the bulky parts of the machine tool might be as high as a CNC Milling Machine From Design point of view: Design level might be considered low compared with the design required in both the regular CNC machine and our machine. From Accuracy Point of view: Accuracy is very low compared to the other two cases but could be difficulty approached with the use of very skilled labor and with high cost. Case 2: A regular CNC machine From Cost Point of view: Cost is much higher because of the usage of both large material amounts with high machining grade as will as the cost of the motion control equipments. From Design Point of view: Design is better than the first case for every part is designed to enhance the entire machining operation. From Accuracy Point of view: Attained accuracy is very high due to perfect guide ways assisted by ball screws along with feed back control. Case 3: A gantry CNC milling machine From Cost Point of view: Cost is mush less than the later case and might be less that the first case as the entire machine is only build from a metal sheet and some Bars. From Design Point of view: Design is much sophisticated than the first and the second case as the design is optimized to hold the predetermined forces as a light weight structure. From Accuracy Point of view: Accuracy is for sure less than the second case but higher than the first case as there is no feedback control technique employed. Discussion of results: For case 1: Universal Milling Machine Our results dont imply that the use of that machine is not appropriate but we only mean that each application requires a certain machine and also each goal. The cost is very high in EGYPT as almost all of them is imported but not made in EGYPT but there maintenance and overhauling is available domestically. For Case 2: three axis CNC milling machine Vertical Column type. The usage of this type of machines in any workshop requires a great deal of money so most of the manufacturers comprises between money and accuracy. The cost is definitely much higher as there is almost no one building or even providing maintenance for these machines in EGYPT. For Case 3: Gantry style CNC milling machine. The usage of this machine is aimed to workshops who would like to get both cheap machining with good accuracy. The cost is very low as of the innovative design of putting the entire axis moving over each other rather than independent from each other as in the regular design of any CNC machine Chapter II Literature Review 2.1 Milling Machine Milling is the process of machining flat, curved, or irregular surfaces by feeding the work piece against a rotating cutter containing a number of cutting edges. The milling machine consists basically of a motor driven spindle, which mounts and revolves the milling cutter, and a reciprocating adjustable worktable, which mounts and feeds the work piece. 2.1.2 Milling Machine History Unlike lathes, which have been known for thousands of years, milling machines are less than two hundred years old. Because they require much more power than hand-driven lathes, their introduction had to wait for the invention of industrial water and steam power. Also, all their mechanical components had to first be made available, such as accurately fitted slides, large castings to resist cutting forces, calibrated lead screws, and hardened steel cutting tools. Eli Whitney is credited with inventing the first milling machine about 1818, but the knee-and-column support arrangement of the universal milling machine of Joseph A. Brown (later of Brown and Sharpe) dates from 1862 and marks an important step in the machines development. During the last half of the nineteenth Century, milling machines gradually replaced shapers and planers which have lathe-type, single-point tool bits that move over the work in a straight line and scrape off metal one stroke at a time. Milling machines, with their continuous cutting action, not only remove metal faster than shapers and planers, they perform additional operations like cutting helices for gears and twist drills. Today, milling machines greatly outnumber shaping and planning machines. Americans in New England and later the Midwest continuously added features leading to the modern milling machine. Another important development came in the 1930s when Rudolph Bannow and Magnus Wahlstrom brought out the Bridgeport-style vertical milling machine. This design offers versatility and economy in place of the higher metal removal rates of traditional horizontal milling machines. Because of this versatility, there are more Bridgeport-style mills in existence today than any other milling machine design. Horizontal mills are now usually reserved for production applications where high metal removal rates on identical parts are needed, not prototyping and short runs. Bridgeport-style machines are also called knee-and-column machines and turret mills. For production applications, there are large, expensive milling machines with three or more axes under computer control. Some machines perform all operations including automatic tool changing. However, today there is an intermediate step between a manual mill and a fully automated one. Adding a computer, digital readouts, and actuators to the X- and Y-axes of a Bridgeport-style mill does this. Not only can this enhanced machine tirelessly perform all its existing repetitive functions, it also has added new capabilities. Now the mill can engrave (drive the tool to cut numbers and letters in various sizes and fonts), cut radii and angles without a rotary table, make islands, pockets, and cut ellipses, and frames. Entering the position, diameter and number of holes, automates cutting a bolt-hole pattern; the system does the math. The computer can automatically compensate for the reduced diameter of re sharp end milling cutters, saving time and money. The system can be manually programmed through its control panel, use stored programs, â€Å"learn† new tasks by memorizing a series of manual operations as the operator makes the first part, or accept files from CAD programs. 2.1.1 Type of MILLING MACHINES Milling machine are classified on the base of the position of their spindle. The spindle operates in either a vertical or horizontal position or on base of construction. In a following section we represent the different type of milling machine. Column Knee-type Milling Machine Fig 2 machines are characterized by a vertically adjustable worktable resting on a saddle which is supported by a knee. The knee is a massive casting that rides vertically on the milling machine column and can be clamped rigidly to have column in a position where the milling head and milling machine spindle are properly adjusted for operation. The plain vertical column knee type machines are characterized by a spindle located vertically, parallel to the column face, and mounted in a sliding head that can be fed up and down by hand or power. Modern vertical milling machines are designed so the entire head can also swivel to permit working on angular surfaces. The plain horizontal milling machines column contains the drive motor and gearing and a fixed position horizontal milling machine spindle. An adjustable overhead arm containing one or more arbor supports projects forward from the top of the column. The arm and arbor supports are used to stabilize long arbors. Supports can be moved along the overhead arm to support the arbor where support is desired depending on the position of the milling cutter or cutters. UNIVERSAL MILLING MACHINE The basic difference between a universal milling machine and a plain column knee type milling machine is the addition of table swivel housing between the table and the saddle of the universal machine. This permits the table to swing up to 45 ° in either direction for angular and helical milling operations. The universal machine can be fitted with various attachments such as the indexing fixture, rotary table, slotting and rack cutting attachments, and various special fixtures. RAM-TYPE MILLING MACHINEThe ram-type milling machine is characterized by a spindle mounted to a movable housing on the column to permit positioning the milling cutter forward or rearward in a horizontal plane. Two popular ram-type milling machines are the universal milling machine and the swivel cutter head ram-type milling machine. Gantry Milling Machinefigure 5is simplest construction of milling machine is usually use in CNC machine for cutting wood plastic and light metal Rotary-Table Milling MachinesThese are also called continuous milling machines, as the work picas are set up without stopping the operation. Rotary-table machines are highly productive; consequently, they are frequently used for both batch and mass production. The Work prices being machined are clamped in fixtures installed on the rotating table (2) figure 6. The machines may be equipped with one or two spindle heads (1).When several surfaces are to be machined; the Work pieces are indexed in the fixtures after each complete revolution of the table. The machining cycle provides as many table revolutions as the number of surfaces to be machined. 2.1.2 MILLING CUTTERS The milling cutters are selected for each specified machining duty. The milling cutter may be provided with a hole to be mounted on the arbor of the horizontal milling machines, or provided with a straight or tapered shank for mounting on the vertical or horizontal milling machine. Figure 7 visualizes commonly used milling cutters during their operation. These include the following: Plain milling cutters are either straight or helical ones. Helical milling cutters are preferred for large cutting widths to provide smooth cutting and improved surface quality (Figure 7 a). Plain milling cutters are mainly used on horizontal milling machines. Face milling cutters are used for the production of horizontal (Figure 7 b), vertical (Figure 7 c), or inclined (Figure 7 d) at surfaces. They are used on vertical milling machines, planer type milling machines, and vertical milling machines with the spindle swiveled to the required angle. Side milling cutters are clamped on the arbor of the horizontal milling machine and are used for machining of the vertical surface of a shoulder (Figure 7 e) or cutting a keyway (Figure 7 f). Interlocking (staggered) side mills (Figure 7 g) mounted on the arbor of the horizontal milling machines are intended to cut wide keyways and cavities. Slitting saws (Figure 7 h) are used on horizontal milling machines. Angle milling cutters, used on horizontal milling machines, for the production of longitudinal grooves (Figure 7 I) or for edge chamfering. End mills are tools of a shank type, which can be mounted on vertical milling machines (or directly in the spindle nose of horizontal milling machines). End mills may be employed in machining keyways (Figure 7 j) or vertical surfaces (Figure 7 k). Key-cutters are also of the shank type that can be used on vertical milling machines. They may be used for single-pass milling or multi pass milling operations (Figures 7 l and 7 m). Form-milling cutters are mounted on horizontal milling machines. Form cutters may be either concave as shown in (Figure 7 n) or convex as in Figure (7 o). T-slot cutters are used for milling T-slots and are available in different sizes. The T-slot is machined on a vertical milling machine in two steps: 1-Slotting with end mill (Figure 7 j) 2-Cutting with T-slot cutter (Figure 7 p). Compound milling cutters are mainly used to produce compound surfaces. These cutters realize high productivity and accuracy (Figure 7 q). Inserted tool milling cutters have a main body that is fabricated from tough and less expensive steel. The teeth are made of alloy tool steel, HSS, carbides, ceramics, or cubic boron nitride (CBN) and mechanically attached to the body using set screws and in some cases are brazed. Cutters of this type are confined usually to large-diameter face milling cutters or horizontal milling cutters (Figure 7 q). Gear milling cutters are used for the production of spur and helical gears on vertical or horizontal milling machines (Figures 7 r and 7 s). Gear cutters are form-relieved cutters, which are used to mill contoured surfaces. They are sharpened at the tooth face. Hobbing machines and gear shapers are used to cut gears for mass production and high-accuracy demands. 2.1.3 Milling operation Milling is the removal of metal by feeding the work past a rotating multi toothed cutter. In this operation the material removal rate (MRR) is enhanced as the cutter rotates at a high cutting speed. The surface quality is also improved due to the multi cutting edges of the milling cutter. The action of the milling cutter is totally different from that of a drill or a turning tool. In turning and drilling, the tools are kept continuously in contact with the material to be cut, whereas milling is an intermittent process, as each tooth produces a chip of variable thickness. Milling operations may be classified as peripheral (plain) milling or face (end) milling (Figure 8). In peripheral milling, the cutting occurs by the teeth arranged on the periphery of the milling cutter, and the generated surface is a plane parallel to the cutter axis. Peripheral milling is usually performed on a horizontal milling machine. For this reason, it is sometimes called horizontal milling. The appearance of the surface and also the type of chip formation are affected by the direction of cutter rotation with respect to the movement of the WP. In this regard, two types of peripheral milling are differentiable, namely, up-milling and down-milling. Up-milling is accomplished by rotating the cutter against the direction of the feed of the WP (Figure 9 a). The tooth picks up from the material gradually; that is, the chip starts with no thickness and increases in size as the teeth progress through the cut. This means that the cycle of operation to remove the chip is first a sliding action at the beginning and then a crushing action takes place, which is followed by the actual cutting action. In some metals, up-milling leads to strain hardening of the machined surface, and also to chattering and excessive teeth blunting. Advantages of up-milling include the following: It does not require a backlash eliminator. It is safer in operation (the cutter does not climb on the work). Loads on teeth are acting gradually. Built-up edge (BUE) fragments are absent from the machined surface. The milling cutter is not affected by the sandy or scaly surfaces of the work. Down-Milling is accomplished by rotating the cutter in the direction of the work feed, as shown in Figure 9b. In climb milling, as implied by the name, the milling cutter attempts to climb the WP. Chips are cut to maximum thickness at initial engagement of cutter teeth with the work, and decrease to zero at the end of its engagement. The cutting forces in down milling are directed downward. Down-milling should not be attempted if machines do not have enough rigidity and are not provided with backlash eliminators. Under such circumstances, the cutter climbs up on the WP and the arbor and spindle may be damaged. Advantages of down-milling include the following: Fixtures are simpler and less costly, as cutting forces are acting downward. Flat WPs or plates that cannot be held can be machined by down-milling. Cutter with higher rake angles can be used, which decreases the power requirements. Tool blunting is less likely. Down-milling is characterized by fewer tendencies of chattering and vibration, which leads to improved surface finish. up milling down milling In face milling, the generated surface is at a right angle to the cutter axis. When using cutters of large diameters, it is a good practice to tilt the spindle head slightly at an angle of 13 ° to provide some clearance, which leads to an improved surface finish and eliminate tool blunting. Face milling is usually performed on vertical milling machines; for this reason, the process is called vertical milling, which is more productive than plain milling. 2.2 Computer Numerical Control The abbreviation CNC stands for computer numerical control, and refers specifically to a computer controller that reads G-code instructions and drives a machine tool, a powered mechanical device typically used to fabricate components by the selective removal of material. CNC does numerically directed interpolation of a cutting tool in the work envelope of a machine. The operating parameters of the CNC can be altered via a software load program. 2.2.1 Historical overview CNC was preceded by NC (Numerically Controlled) machines, which were hard wired and their operating parameters could not be changed. NC was developed in the late 1940s and early 1950s by John T. Parsons in collaboration with the MIT Servomechanisms Laboratory. The first CNC systems used NC style hardware, and the computer was used for the tool compensation calculations and sometimes for editing. Punched tape continued to be used as a medium for transferring G-codes into the controller for many decades after 1950, until it was eventually superseded by RS232 cables, floppy disks, and now is commonly tied directly into plant networks. The files containing the G-codes to be interpreted by the controller are usually saved under the .NC extension. Most shops have their own saving format that matches their ISO certification requirements. The introduction of 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 of machining steps that required human action has 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 automation 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 changing the machine to produce different components. 2.2.2 Production environment A series of CNC machines may be combined into one station, commonly called a cell, to progressively machine a part requiring several operations. CNC machines today are controlled directly from files created by CAM software packages, so that a part or assembly can go directly from design to manufacturing without the need of producing a drafted paper drawing of the manufactured component. In a sense, the CNC machines represent a special segment of industrial robot systems, as they are programmable to perform many kinds of machining operations (within their designed physical limits, like other robotic systems). CNC machines can run over night and over weekends without operator intervention. Error detection features have been developed, giving CNC machines the ability to call the operators mobile phone if it detects that a tool has broken. While the machine is awaiting replacement on the tool, it would run other parts it is already loaded with up to that tool and wait for the operator. T he ever changing intelligence of CNC controllers has dramatically increased job shop cell production. Some machines might even make 1000 parts on a weekend with no operator, checking each part with lasers and sensors. 2.2.3 CNC Components and Control System The two main components of a CNC machine are the machine tool and the machine control unit (MCU). The MCU is the computer that operates the machine tool. There are many manufacturers of these control units, so program codes may vary somewhat between machines. Figure 10 shows three types of control systems for NC and CNC machines. The least expensive type is called a point-to-point (PTP) control system. A PTP control system can only move a tool in a straight line and is limited to hole operations (drilling, boring, reaming, etc.) and spot welding. The tool path between points is not controllable in a PTP system. A straight-cut control system is capable of moving the cutting tools in a straight line between points. However, only one axis drive motor can move at one time, so arcs and angles are not possible. The contouring control system is the most expensive and flexible of the three systems. With the recent advances in electronics, the price difference between these systems has narrowed so much that every CNC machine is now manufactured with a contouring control system. A contouring system is capable of doing what the other systems can do while also being able to cut arcs and angles. 2.2.3 Positioning Formats A CNC program is written using the Cartesian coordinate system. The CNC tool can be moved inside the rectangular coordinates in either two or three dimensions. Lathes are programmed two-dimensionally using only the x- and y-axes, while milling machines are programmed three-dimensionally using the x-, y-, and z-axes. The z-axis is always the axis that determines the depth of cut. The x-axis is parallel to the longest length of the machine table, and the y-axis is parallel to the shortest length of the machine table. CNC programs can be written in one quadrant or four quadrants. CNC machines can be positioned in two ways with respect to the Cartesian coordinate system. They can be positioned in an absolute format or an incremental format. In the absolute format, all machine locations are taken from starting point (0, 0), which is referred to as the home position. In incremental format there are no assigned or home coordinates. The cutter tool bit moves in spaces (increments) relative to the coordinates previously listed. The absolute format is typically used for the main body of a CNC program. This allows the cutting tool to be given a home position to start and end its job. The incremental format is used in the middle of a program when a repetitious cycle (commonly referred to as a canned cycle) is needed. A canned cycle is a cutting pattern that can be programmed to repeat as many times as desired. It can reduce the size of a program tremendously, depending on the number of machining operations involved. The size of a program is reduced by a canned cycle because a programmer does not have to give the fixed coordinates of each move of the cutting tool. A programmer must only give the distance from each previous move of the cutter for one cycle. After that, a programmer merely has to list the number of times the cycle must be repeated. A programmer can also call up the canned cycle and use it again to do a similar machining operation in another part of the work piece. 2.2.4 CNC Programming Because of the added feature of a computers memory, CNC programming is a lot easier and simpler than conventional NC programming. Most CNC machines can be programmed using a standardized list of codes that were developed by the Electronics Industries Association (EIA), as shown in Table 1. These codes include preparatory functions or G codes. Some of these functions include cutting an arc in a clockwise direction (G02 circular interpolation) and telling the machine that the dimensions will be given in millimeters (G71-metric programming). 2.2.5 Task Flow in CNC The task flow that is needed for producing apart using a CNC machine can be summarizedas Fig.1.2.The tasks can be classified as the following three types: Offline tasks: CAD, CAPP, CAM. Online tasks: CNC machining, monitoring and On Machine Measurement. Post-line tasks: Computer Aided Inspection (CAI), post-operation. Offline tasks are the tasks that are needed to generate apart program for controlling a CNC machine. In the offline stage, after the shape of apart has been decided, a geometry model of this part is created by 2D or 3D CAD. In general, CAD means Computer Aided Design After finishing geometric modeling, Computer Aided Process Planning, CAPP, is carried out where necessary information for machining is generated. In this stage, the Selection of machine tools, tools, jig and fixture, decisions about cutting conditions, Scheduling and machining sequences are created. Because process planning is very Complicated and CAPP is immature with respect to technology, process planning generally depends on the know how of a process planner. CAM (Computer Aided Manufacturing) is executed in the final stage for generating apart program. In this stage, tool paths are generated based on geometry information from CAD and machining information from CAPP. During tool path generation, interferences between tool and work piece, minimization of machining time and tool change, and machine performance are considered .In particular; CAM is an essential tool to generate 2.5D or 3D tool paths for machine tools with more than three axes. Online tasks are those that are needed to machine parts using CNC machines. A part program, being the machine understandable instructions, can be generated in the above mentioned offline stage and part programs for a simple part can be directly edited in CNC by the user. In this stage, the CNC system reads and interprets part programs from memory and controls the movement of axes. The CNC system generates instructions for position and velocity control based on the part program and servo motors are controlled based on the instructions generated. As the rotation of a servo motor is transformed into linear movement via ball screw mechanisms, the work piece or tool is moved and finally, the part is machined by these movements. In the online stage, the status of the machine and machining process may be monitored during machining. Actually, tool breakage detection, compensation of thermal deformation, adaptive control, and compensation of tool defection based on monitoring of cutting force, heat, and electric current are applied during machining. On Machine Measurement is also used to calculate machining error by inspecting the finished part on the machine, returning machining errors to controller to carryout compensation. The post-line task is to carryout CAI (Computer Aided Inspection), inspecting the finished part. In this stage, inspection using a CMM (Coordinate Measurement Machine) is used to make a comparison between the result and the geometry model in order to perform compensation. The compensation is executed by modifying tool Compensation or by doing post operations such as re machining and grinding. Reverse engineering, meaning that the shape of the part is measured and a geometric model based on the measured data is generated, is included in this stage. As mentioned above, through three stages, it is possible for machine tools not only to satisfy high accuracy and productivity but also to machine parts with complex shape as well as simple shapes. Because CNC machines can machine a variety of parts by changing the part program and repetitively machine the same part shape by storing part programs, CNC machines can be used for general purposes.

Freedom Of Expression Vs Censorship Policy Media Essay

Freedom Of Expression Vs Censorship Policy Media Essay That leads to the question: Is freedom of expression the opposite to censorship policy? Based on my understanding in Broadcasting Act 1988, Ive to disagree with the statement because freedom of expression and censorship policy are both essential to a countrys development and growth. Censorship policy is a necessity to media because contents that are published through the media must always be checked and filtered in order to prevent harmful and misleading contents to reach the public. Examples are sex-related scenes, violence and gore scenes, and some to the extent of causing racial controversy among the people. It is true that the contents found in media are not 100% true and authentic; However if too much truth and info are exposed to the public, then how certain are we that the public are ready to accept all the facts? Secondly, freedom of expression is essential for a democratic country to grow and develop succeedingly without the abuse of power. Freedom of expression also allow different views and opinions to be voiced out to the public and a country such as Malaysia that has citizens of diverse race, religion, and culture can share their beliefs and be more aware. In addition, freedom of expression has many beneficial effects to society. Freedom of expression also opens opportunity for citizens to take part in decision making of the country such as the rights to vote. Furthermore, citizens can voice out their thoughts and opinion freely without being judged. We refer to freedom of expression rather than freedom of speech because it is more accurately conveyed that it does not have to be words that is said but by the acts that we did. However, freedom of expression may cause harm to others and if it is not controlled properly, libel and slander might occur and conflict will happen. A good example will be the case of Wee Meng Chee aka Namewee that has caused a racial controversy by putting a video of our national anthem with racial slur in it. So this is why freedom of expression should be controlled even though it is necessary for a democratic society. As we can see, freedom of expression and censorship policy synchronizes together and a democratic country could not grow with just one and without the other. That boils up to the point, is all this restriction and limitation really necessary and needed? I will say its very important to be able to balance both freedom of expression and censorship policy. We need to have strong moral values in order to be able to filter contents that are useful and contents that may be harmful and malicious. We the people of the country are actually the cause of all the conflict and controversy that has happened in our nation. As long as we are not educated with proper moral values and ethics, there will always be issues regarding censorship policy and freedom expression. There is a saying: With great power, comes great responsibility. Based on that quote, I believe that both freedom of expression and censorship policy can be a very useful tool if we were to use it wisely but it can also be a very destructive weapon if we do not imply wisdom in using it. There must be boundaries and limitation concerning freedom of expression because more and more individual are starting to rise up and make a stand by voicing out their opinion. It is a good thing that we are able to listen and share different views and opinion. If freedom of expression is used with the intent of helping others and bringing unity then those kinds of acts and speeches should not be blocked and restricted. A very good example pertaining to good use of freedom of expression is the issue of Martin Luther King. Quoting from his speech, he said that we should face hostility with peace. If the public can have a mature and rational thinking like Martin Luther King then freedom of expression can lead to a good thing. The government should control the public from delivering hate speech but they shouldnt restrict and stop the public from expressing honest opinion or we as a nation would always be distorted and blinded with lies. The case of Irene Fernandez has sparked up a very sensitive issue among the public. Irene Fernandez published a report on the living conditions of the migrant workers entitled  Abuse, Torture and Dehumanized Conditions of Migrant Workers in Detention Centres and she was detained and charged for maliciously publishing false news. Do you think it is fair for a woman that merely defended the rights of migrant workers to be under the longest trial in Malaysia history? Malaysia is recognized as a democratic country with variety of races, religion, and culture and Malaysia supports freedom of expression but the charge of Irene Fernandez has bring about confusion to the public. It is said that we have the freedom of expression but the arrest of Irene Fernandez has proven that we do not really have the freedom of expression rather it is just a cover up done by the government. We the people make the government so henceforth if we can grow to be a wise and developed society, then freedom of expression and censorship policy can be a channel for us to share beliefs and opinion without worrying that conflicts might spark. I will end this essay with a question. Can our voices be heard fairly despite all this restriction and limitation?

A Cup of Coffee :: essays research papers

The loud beeping of the alarm rudely interrupts a fitful night of sleep. The thought of reaching an arm out from under the warm covers to turn the alarm off seems like a bad idea. Out of bed, rise and shine! It is a new beginning to another day. The thought of leaving the warm bed still seems like a bad idea. Just a few more minutes sleep is what is wanted. Peace and quiet still abound as the other family members are still asleep.   Ã‚  Ã‚  Ã‚  Ã‚  Wafting through the air, the enticing smell of hazelnut coffee tickles the nose with its sweet aromatic essence. It is the breaking point at which gives strength and motivation for leaving the warmth of the covers. Upon entering the kitchen the sounds of the coffee maker proclaims it’s promise to satisfy as it pop, pop, hisses and the aroma of the coffee caresses your nose and tickles your senses. With the coffee pot in view, the step quickens in order to reach the cabinet and get a big coffee mug. With a little bit of sugar to sweeten the coffees already sweet hazelnut flavor, the coffee pot proclaims that its job is done with a final pop and hiss. Pouring the hot black liquid into the mug watching as the sugar melts and becomes one with the coffee, a taste is taken, deciding that a little more sweetness is desired, a little more sugar is added, and upon second taste the senses explode in the mouth as the tongue declares, â€Å"it is good!† Taking t he cup to the table to drink the drink of life and ponder the days events as they might unfold, realizing that they probably won’t unfold as one would wish and that if they did life would not be as adventurous, thus brining your thoughts back to present and watching the birds as they to waken and begin feeding themselves at the feeder filled the day before. Holding the coffee mug as its warmth transfers to both hands, taking another drink and realizing that it is time for a refill, because one cup just isn’t enough.

Pip as a Sympathetic Character in Great Expectations :: Great Expectations Essays

Pip as a Sympathetic Character in Great Expectations Can you imagine being totally in love with someone who is completely turned off by you? This is what happens to Pip. Throughout the book Estella disregards his feelings. In Great Expectations my sympathy for Pip fluctuates. Pip starts out as a sympathetic character because he is poor, his parents are dead, and he must live under Mrs. Joe's strict rules. As the story moves on, my sympathy for Pip decreases in every way except one: his relationship with Estella. Ever since their first acquaintance, Pip has thought Estella to be the most beautiful girl alive. He changes when he gets around her. When Mrs. Havisham asks Pip about Estella, he answers with words like "proud," "pretty," and "insulting." Miss Havisham wants Pip to like Estella, and she tells Estella she can break his heart. As the visits to Miss Havisham's increase, Pip realizes his feelings for Estella. He practically cannot live without her, but she treats him as a common boy. Pip wants more than anything to become uncommon so Estella might come to like him. He wants her to think of him as a person and not as an uneducated blacksmith apprentice. Estella begins to realize that Pip has feelings and taunts him by asking if he thinks she is pretty. A significant scene is when Estella questions Pip about herself and she slaps him. Then she teases him more and says why doesn't he cry again. Pip replies, "Because I'll never cry for you again," but he knows this is not true and says this "was, I suppose, a false declaration as ever was made, for I was inwardly crying for her then, and I know what I know of the pain she caused me afterwards" (94). As the two characters grow up and mature and as Pip becomes a gentleman, Estella learns of the extent of Pip's feelings. She tells Pip she is to be married and says his pain should pass in no time, about a week. Pip then reveals every thought and feeling he has ever had for Estella over the years. The most important parts of his confession are in the beginning of the speech. Pip confesses, ". . . you are part of my existence, part of myself. You have been in every line I have ever read, since I first came here, the rough common boy whose poor heart you wounded even then.

Become a Better Driver

In every major city accidents happen in which people are injured or killed. These unintended injurious events are caused by a â€Å"mistake† made by the parties involved (Hughes). Many people are good drivers, but it would be good for people to learn to be better drivers. It will help people if they have to retake their license test when they renew their license. This will help them follow the road rules, be more respectful to other drivers, and avoid other distractions while driving. If people follow the road rules, they will learn to become better drivers. There are many different rules that drivers have to learn in order to get their license. If they follow the same rules they learned in the beginning, then there shouldn’t be as many wrecks today as there are. If everyone has to retake their license test when their license expires, then that will help them remember the road rules. An article states, â€Å"U-turns account for over 19 deaths and 654 serious crashes between the year 2004 and 2008† (Road Safety). Recently there have been some changes in the road rules because there have been so many wrecks. In, â€Å"Five Thousand Teenagers Die Annually in Crashes† it states, â€Å"In 2004, more than 2,500 teens were in fatal crashes because of failing to yield or veering out of their lanes† (Hughes). Mistakes like this cause a lot more crashes. So it is important the people retake the license test so they learn to become better drivers so not so many accidents happen. Drivers should learn to be more respectful toward other drivers. When driving, people don’t pay attention to other drivers. Such as at four way stops you need to make sure you wait until it’s your turn to go. Don’t just go because you don’t feel like waiting. â€Å"Intentionality can be seen in a range, from deliberate carelessness (hope no one gets hurt) to recklessness (too bad for them if they don’t get out of the way)† (Hughes). When drivers don’t care about other drivers on the road, more than likely, there are going to be accidents. An article states, â€Å"Weekly, there are stories reported of â€Å"accidents† that are really events based on bad decisions, which have predictable results† (Hughes). Drivers pay too much attention to other distractions. There are cell phones, radios, GPS’s, billboards, etc. A lot of drivers have wrecks because the distractions cause them to pay attention to something else other than driving. Devices aren’t the only distractions. When teenagers have friends in the car with them it is also a distraction. When teenagers drive with their friends, it causes them to not pay as much attention to the road as they should. â€Å"44% of teens acknowledge they drive more safely without friends in the car† (Hughes). Drivers need to pay attention to the road and other drivers instead of everything else going on. Many people consider themselves good drivers. There are always ways that someone can become a better driver, even if you think you already are. In an article it states, â€Å"In the United States, an average of 5,000 teens die every year in car crashes- an average of 14 teenage lives lost every day† (Hughes). If everyone was as good of a driver as they think they are then that many teens would not die yearly. That is why everyone should have to retake their license test when they have to renew their license. Sometimes accidents can just happen regardless of how good of a driver the person is. There is really no way of stopping these kinds of accidents except for trying to avoid them in all possible ways. But even if you try to avoid them, the accident might still happen. If drivers have to retake their license test it would help them keep aware of their surroundings and how to avoid accidents. Everyone can learn to be a better driver by following the rules of the road, respecting other drivers, and by not getting distracted by other things. Although almost everyone says they are good drivers there is always room for improvement. Become a better driver so there will be fewer accidents yearly.

Micro Econ Exam Review

Characteristics of competitive markets (3): There must be many buyers and sellers, none of whom can have a large market share, a few players cannot dominate the market. Firms must produce a standardized product, buyers must see all their products as equivalent. (Identical (Homogeneous) Products), Firms and resources are typically fully mobile, allowing free exit and entry. These three conditions make all consumers and producers price- takers. Models: Section 12. 2 Market Market Assumptions: Firm The firm is a profit maximizing firm.The individual firm can sell all they can at the market price. Each Individual firm supplies only a small portion of market supply, and therefore can't manipulate the market price. The firm Is a price-taker: they take the market price as given. 2. Profit Minimization: The firm will maximize profit at the output level that has the greatest difference between Revenues + Cost. The firm can/will profit maximize where Marginal Revenue (MR..) = Marginal Cost (MA C). Since the perfectly competitive firm is a price taker P=MR†¦ Therefore, the profit maximizing condition can be written MR..=MAC or FEM.. (SameCondition). If MR.. > MAC then Increase Output. If MAC > MR.. Then Decrease Output. Model: Section 12. 3 Finding the Profit Maximizing Level of Output Model: 1 OFF Determine if the firm is generating economic profits, economic losses, or Zero economic profits. NOTE: cost curves include both implicit + explicit costs + can therefore be used to determine economic profits or losses. 4 Step Process: 1 . Determine the profit maximizing level of output (where MR..=MAC). 2. Calculate total revenue = Price x Quantity 3. Calculate total cost = TACT x Quantity (TACT is always U Shaped) 4. Compare TRY + ETCIf TRY > ETC then Con. Profits If ETC > TRY then Con. Losses If TRY = ETC then Zero Con. Profits 5. Models on next page. Section 12. 4: Economic Profits Economic Loss Zero Economic Profits Economic Profits: firm is generating enough revenue to cover accounting cost + opposing cost of resources employed. (Covering both explicit + implicit costs) Indicates an efficient allocation of scarce economic resources. Economic Losses: firm may be covering act. Cost but they are not covering the pop. Cost of resources employed. Indicates an inefficient allocation of scarce economic resources. Long – Run Analysis: If existing firms are generating economic profits: it will result in outside firms/ resources to enter the market. Models below: Section 12. 5 Individual Firm Individual firms will continue to enter the market until all economic profits have been competed away. In long-run equilibrium all firms will be left generating zero profit. If existing firms are generating Con. Loss: Left with 2 options: 1. Continue operating 2. Shut down (temporarily stop producing) If the firm is at least covering bag. Variable cost (PVC) they would be best off to

Concepts of epidemiology (HIV) Essay

Communicable diseases are global health issues nowadays as the world become globalized by increasing international travel and business. Among many of communicable diseases, Human Immunodeficiency Virus (HIV) infection is considered to be one of the most severe communicable diseases worldwide. It has spread rapidly throughout the whole world from the continent of Africa since it was first reported in 1981(Maurer & Smith, 2009). By 1987, it had spread to 100 countries, by 2001, HIV became the leading infectious cause of death in the world. Scientists believe a similar virus to HIV first found in animals such as chimps and monkeys in Africa, where Africans are hunted for food. While they contact with an infected animal’s blood during butchering or cooking, the virus might cross into humans and become HIV (Mayo Clinic, n.d.). HIV causes acquired immune deficiency syndrome(AIDS). Having HIV does not always mean having AIDS. To develop AIDS, it take many years for people with HIV. The epidemic of HIV/AIDS in Africa is devastating because it disrupts family life, leaving many children without parents’ support. Reduced workforces in African society impact socioeconomic issues as well. These days, HIV/AIDS are not only problems in the African continent, but they are now also seen in every continent in the entire world. As of 2008, United Nations (UN) general assembly special session on HIV/AIDS estimated that there were roughly 33-4 million people living with HIV, 2.7 million new infections of HIV, and 2 million deaths from AIDS. According to the Center of Disease Control(CDC), about 1.1 million people in the U.S. had been diagnosed with AIDS since the disease diagnosed in 1981(Maurer & Smith, 2009). A person gets HIV when an infected person’s body fluids such as  blood, semen, fluids from vagina or breast milk get into his or her bloodstream. This virus can enter the bloodstream through linings in the mouth, anus, or sex organs through broken skin. HIV attacks and destroys CD4 cells which is same as T-cells in white blood cells (Moss, 2013). When a person has lower number of CD4 cells in the blood than normal, he or she is susceptible to illnesses because the person lost ability to fight infection. Unsafe sexual activity, transfusion of HIV infected blood, sharing needles and syringes with people with HIV, HIV infected mothers’ pregnancy, delivery, and breast-feeding are all risk factors for HIV infection. World Health Organization(WHO) found that 80% of cases of HIV/AIDS infections happened by unsafe sexual contact with an HIV-infected person. Stigma, discrimination, misconception, local social and cultural taboos also contribute to increasing number of HIV infections in developing countries where people do not talk about them or people are not educated about them. Early symptoms of HIV infection are fever, fatigue, swollen lymph nodes, diarrhea, weight loss, cough, headache, blurred and distorted vision, skin rashes or bumps, and shortness of breath(Moss, 2013). People infected with HIV progress to AIDS when their CD4 cell count falls down below 200 or when they develop complications such astuberculosis, salmonellosis, cytomegalovirus, candidiasis, cryptococcal meningitis, toxoplasmosis, cryptosiporidiosis, and cancers including Kaposi’s sarcoma and lymphomas. Other complications can include wasting syndrome, neurological complications, and kidney disease(Moss, 2013).AIDS is the last stage of HIV infection and life threatening. If a person with HIV does not receive treatment, the disease progresses to AIDS in about 10 years (Mayo Clinic, n.d.). Good news is that there is a treatment with antiviral medication for HIV infection even though there is no complete cure for HIV/AIDS. As soon as a person is diagnosed as HIV-positive, a variety of drugs can be used in combination to control this virus. The Department of Health and Human Services recommend that everyone with HIV infection must be offered antiviral medications regardless of T-cells count in order to restrict replication and duplication of the virus. HIV medications are more widely available than ever. They expand the lifespan of people with HIV. Not only drug regimen, but healthy life style such as eating healthy foods including fish oil and whey protein, avoiding certain foods including unpasteurized  dairy products, raw eggs, and raw seafood, getting vaccine, obtaining coping skills contribute to reducing further complication of HIV/AIDS (Mayo Clinic, n.d.). Prevention is the most important through education on safe sexual activity, safe care of blood transfusion, protective care of pregnancy, delivery, and breast-feeding among mothers with HIV/AIDS, etc. The epidemiologic triangle is composed of agent, host, and environment. These three are interrelated to spread the communicable diseases such as HIV/AIDS. For example, the agent factor is the presence or absence of human immunodeficiency virus that is transmitted directly through infected blood transfusion, sharing infected needles and syringes, and breast feeding from infected mother or indirectly through broken skin by unsafe and unprotected sexual contact. The host factors are people. They can be either HIV-positive or HIV-negative. People who are diagnosed as HIV-negative are susceptible hosts who can be infected by people who are diagnosed HIV-positive if they have unsafe sexual activity or receive unsafe health care. The environmental factors can be social and economic conditions such as poverty, crowding, and frequent mobility of people that carry agents easily to other environments. If the environment is less habitable, the host susceptibility is reduced, and the agent source is also reduced or eliminated as well. All three factors may be altered to improve community resistance to HIV infection (Maurer & Smith, 2009) Host AgentEnvironment Figure 1 HIV Epidemiologic Triangle The community and public health nurses play an important role through their tasks such as case finding, reporting, data collection and analysis, and follow-up. 1. Responsibility of primary prevention; Community and public health nurses are in the front line to assess a person, family, and communities for epidemiologic agents, susceptible hosts, and favorable environments. Nurses are responsible for educating people in the community about the causes and spread of the virus. Since 80% of HIV infection occurs by sexual contact with an HIV infected person, abstinence or advocacy of the use of condoms and other protective measures during sexual activity must be taught to people of all ages at risk, young or old, male or female. Safe  administration of blood, safe use of needles and syringes, safe breast-feeding, and protective health care of mothers with HIV during pregnancy or delivery must also be taught and performed as well for primary prevention. 2. Responsibility of secondary prev ention: Despite education and prevention efforts, reducing HIV infection is challenging. In 2009, CDC reported, youth, ages 13-29, accounted for 39% of all new HIV infections in the U.S.(Albright & Gavigan, 2014). Nurses are responsible for secondary prevention through effective intervention. There is no cure for HIV/AIDS , yet medication regimen help improve life expectancy by preventing HIV-related complications. Combination of medications at least three of antiretroviral can be used to control the virus(Moss, 2013). Nurses should encourage people who receive antiretroviral therapy of 3 to5 combination pills to be compliant with prescribed medications as scheduled. However, combination of antiretroviral cost a lot and are not available in poor countries. WHO support these countries that drug companies provide medications at low cost. Community health care providers suggest voluntary counseling and testing for HIV treatment programs as good strategies. By the help of trained counselors, patients in the community can learn their HIV status and register for treatment as needed. In South Carolina, since the number of young adults with new HIV infection is increased, a new intervention program is designed for young adults that is called HIV/AIDS information vaccine, using graphic novels(Albright & Gavigan, 2014). 3. Responsibility of tertiary prevention; Since HIV/AIDS is incurable and at risk in progression gradually, community and public health nurses can focus on enhancing or optimizing their quality of life. HIV is not only a physiological stressor, but also a significant psychological stressor. Many of HIV positive patient suffer with depression and suicidal ideation. According to the study, these psychological symptoms among HIV-positive people are associated with a decline in CD4 cell count (Dalmida, 2006). By evidence of research, depressive mood affects neuropeptide receptor on lymphocytes and lead to decreased CD4 cell count(Dalmida, 2006). Spiritual practice and mental care for HIV-positive people are beneficial to relax sympathetic nervous system and enhance immune function (Rabin 1999). According to the holistic view of human being, an awareness of one’s spiritual self is very important to extend life span with optimal wellness  increasing greater satisfaction with life. (Rabin, 1999). Community and public health nurses have a role in such responsibilities in order to make a person, family and community different and healthier by providing coping skills with spiritual activities for people who are infected by HIV and who are suffering with AIDS. AIDS United is an organization that carries its mission in the U.S. to end the epidemic of AIDS since 1987. This organization has funded to local communities for syringe access, access to care, capacity building, HIV prevention and advocacy. AIDS United supports community-driven to HIV epidemic around the nation that reach populations with HIV/AIDS including gay and bisexual men and women, adolescents in school. References Albright, K.S., Gavigan, K. (2014) Information Vaccine: using Graphic Novels as an HIV/AIDS prevention resource for young adults. Journal of Education for Library & Information Science; Spring 2014, Vol.55 Issue 2, p178-185. Retrieved from GCU library. Coleman, C.L., Holzemer, W.L. (1999). Spirituality, psychological well-being and the quality of life. In L.A. peplau & D.Perlman (Eds), Loneliness: A sourcebook of current theory, research, and therapy (pp.224-237). New York: Wiley-Inter-science. Retrieved from Grand Canyon University(GCU) Library. Dalmida, S.G. (2006). Spirituality, Mental Health, Physical Health, and Health-related quality of life among women with HIV/AIDS: Integrating spirituality into mental health care. Issues in Mental health nursing. Vol. 27. Retrieved from GCU library. Maurer, F.A., Smith, C.M. (2009) Community/Public Health Nursing Practice: Health for families and populations (4th ed.)[Saunders Version] Retrieved on June 5, 2014 from http://evolve.elsevier.co m Moss, J.A. (2013) HIV/AIDS Review. Journal of Radiologic Technology, 2013 Jan 1; 84(3) pp. 247-270. Retrieved on June 5, 2014 from GCU library. MayoClinic (n.d.). Retrieved on June 5, 2014 from http://www.mayoclinic.org/disease-conditions/hiv-aids/basics/causes/con-20013732 U.S. Centers for Disease Control and Prevention(CDC) http://www.cdc.org/cough/index.htm World Health Organization(WHO) http://www.who.int