Iago Soliloquey Essay

Iago’s soliloquy essay At the end of the first act in scene three Iago convinces Roderigo to go to Cyprus. Roderigo then exits, leaving Iago alone. This gives him the chance to express his thoughts through a soliloquy. The purpose of this soliloquy is to show that Iago is always plotting and to show what his plan is. Shakespeare ends the first act with it to put the audience on edge and go into the second act knowing that something bad is going to happen. Before, in his conversation with Roderigo, Iago was speaking in prose. However, now, in his soliloquy, he speaks in verse. Shakespeare does this to demonstrate Iago’s intelligence and implies that Roderigo is not clever or of high intellectual status. If the audience had their doubts about Iago’s dislike of Othello then â€Å"I hate the Moor† dispels such doubts. This phrase has an immediate impact because in a soliloquy a character will not lie; in previous conversation the audience cannot be certain if the duplicitous Iago is telling the truth. So, for the first time he reveals that he hates Othello with a passion. Or, on the contrary, Iago might be trying to convince himself that he really does hate Othello, which implies that Iago doesn’t, and has no good reason to do so. â€Å"And it is thought abroad that twixt my sheets he’s done my office. I know not if’t be true†¦Ã¢â‚¬ ¦will do as if for surety† Here Iago does not know for sure if his wife is having an affair with Othello but will believe it because it serves his purpose. Again this supports the theory that Iago is trying to convince himself that he has a good reason to hate Othello when he actually doesn’t. Iago thinks that Othello is not suitable for Desdemona: â€Å"Cassio’s a proper man. † This implies that he thinks Cassio is more manly than Othello, and that people would be likely to believe in him as an adulterer. This also shows Iago to be racist because he thinks that a Moor is not a proper man. Later, he also describes Othello as gullible: â€Å"The Moor†¦ †¦thinks men honest that but seem to be so, And will as tenderly be led by the nose As asses are. † The phrase â€Å"let me see now† shows that Iago is already plotting; he creates a clever plan spontaneously, while thinking out loud. This is evidence that Iago is clever. His character is very duplicitous, scheming and, above all, spiteful. If anyone did anything to upset him he would take it too far. Iago says Othello is foolish and easily led: â€Å"And will as tenderly be led by the nose as asses are† This shows Othello is easily led as asses can be led by merely holding a tender part of the nose. Also this insults Othello calling him an â€Å"ass. † In Elizabethan times being compared to any kind of animal was considered insulting and rude, as then humans were considered the only proper race. In addition asses were considered to be stupid and comical. Thus comparing Othello to one is considered an insult. Furthermore, this implies that Iago knows that what he is doing is wrong and evil and yet he still goes through with it. This shows Iago to be evil. â€Å"I hate the moor† What did Othello do to him? He didn’t give Iago the job he wanted. Thus Iago decides to plot against him. This shows that Iago is spiteful and also jealous of Cassio (the man who got the job instead of him). â€Å"That he [Cassio] is too familiar with his [Othello] wife. this demonstrates that Iago is jealous because not only is he plotting against Othello but also against Cassio. Iago’s plan involves using Cassio’s status as a womaniser in order to get revenge. This could be perceived as jealousy of Cassio’s way with women, as well as creating a sense of poetic justice. To turn Cassio’s own success with women into a tool to bring him down shows Iago’s quick wit and cunning. This is also a shrewd method of dealing with two problems at once. The final rhyming couplet shows that Iago knows what he is doing is wrong: â€Å"Hell and night must bring this onstrous birth to the world’s light† The word â€Å"monstrous† was used by Iago to show that this plan is evil therefore he knows it is wrong and he shouldn’t do it. Also â€Å"hell and night† shows that this â€Å"birth† is worthy only to be delivered by Hell and night; both of which can be associated with evil, as in every religion good is represented by light and day, but bad is symbolized by dark and night. As Othello is black this could also be a reference to racism. By calling his idea a â€Å"birth† Iago is emphasising that it is his creation. This reveals that he is not ashamed by what he is about to do and that he might even be proud to lay claim to it. The soliloquy as a whole gives us many new insights into Iago’s character, intentions and abilities. It shows him to be deceitful, devious and intelligent; while the intended outcome of his plan reveals that he will stop at nothing to gain the success that he believes he has been cheated out of. Before this soliloquy, the audience may have suspected that his character was not as good as it seemed, but by the end of the act they can be in no doubt.

Have Gun, Will Travel…to Work

Question 1: Assume that either the Second Amendment or state law gives you a legal right to keep a gun in your car. Do you also have a moral right to do this? Do you have a moral, not only a legal, right to own a gun? Do you have either a moral or a legal right to park a car with a loaded gun in a public parking lot regardless of what the lot’s owner wants? No, I do not have a moral right keep a gun in my car regardless to the Second Amendment or state law gives me the right to keep a gun in my car. Although having a gun in your car is your legal right, the company policy may state it is prohibited.The difference between moral and legal is that your legal right supersedes moral rights. In today society the law over rides the moral aspect of most situations. If you are parked in a public parking lot and it is posted clearly no weapon allowed on the property then you must abide by their rules. Question 2: In your view, do employees have either a moral or a legal right to park ca rs with guns in them in the company parking lot? If so, what about the property rights and safety concerns of employers?If employees don’t have this right, would it be good policy for companies to allow them to stow guns in their cars anyway? Do companies have good grounds for being concerned about weapons in their parking lots? Employees do not have the right to disobey company policies regardless of their moral beliefs. When you are employed by a company, no matter how large or small they are, they have some form of written policies on what they expect of the their employees. Most companies have some type of mission statement about maintaining a safe work place environment.No it would not be a good idea for companies to allow guns to be stored in employees cars if there is a policy of no weapons in place. Companies have very good reason for been concerned with weapon in their parking lots because there are over five hundred work place homicides per year; in addition, 1. 5 m illion employees are assaulted at work, many of them by coworkers or former employees. Question 3: Do you agree with the NRA that if companies ban guns from their parking lots, this restriction would take â€Å"a wrecking ball to the Second Amendment† or nullify the right of people to have weapons for self-defense?Explain why or why not. In your view, have gun advocates been guilty of politicizing this issue? Do you think state legislatures are right to get involved, or should the matter be left to companies and employees to settle? No, I do not agree with the NRA that if companies ban guns from their parking lots, this restriction would take â€Å"a wrecking ball to the Second Amendment† or nullify the right of people to have weapons for self defense. The Second Amendment gives the owner of the property the right to refuse weapons on their private property.I feel everyone believes in the Second Amendment but some people feel more strongly about this issue than others and it is a political issue. The state legislature should not get involved when it pertains to the issue of private property such as company property policies. These types of matters should be left up to the company and their policy makers. Question 4: Because the workplace is the company’s private property, the company could choose, if it wished, to allow employees to bring guns not only into the parking lot but into the workplace itself.Are there ever circumstances in which doing so might be reasonable? Or would the presence of guns automatically violate the rights of other employees to be guaranteed a safe working environment? Some companies allow employees to bring guns not only into the parking lot but into the workplace itself such as police officers, security officers, banks, pawnshops and anywhere the company policy states that guns are allow with the permission of the company. This would not be a violation of the rights of other employees because it is the policy of the company.With such a policy there would have to be some sort of qualification, licensing, and liability. Question 5: What would a libertarian say about this issue? What considerations would a utilitarian have to take into account? What conclusion might he or she draw? A libertarian believes identify justice with an ideal of liberty. Liberty is the prime value, and justice consists in permitting each person to live as he or she pleases, free from interference of others. So, on the matter of gun control in the work place, a libertarian would say, â€Å"If he or she wants to carry a gun then no one should interfere†.Utilitarianism is the moral doctrine that we should always act to produce the greatest possible balance of good over bad for everyone affected by our actions. In this matter a utilitarian would believe that the greatest happiness of all constitutes the standard that determines whether an action is right or wrong. Question 6: If you were on a company’s board of directors, what policy would you recommend regarding handguns, rifles, or other weapons in employees’ cars? In making your recommendation, what factors would you take into account?Would it make a difference how large the company was, the nature of its workforce, or where it was located? If you support banning firearms from the parking lot, what steps, if any, do you think the company should take to enforce that policy? I would recommend the policy of weapons free workplace which would include handguns, rifles, and other weapons in employees’ cars on company property. I would factor in the type of business, the nature of the workforce and where it’s located and then make a sound discussion.If necessary, I would have armed security officers for the safety of the employees and therefore the no weapons policy would still apply. Question 7: Explain whether (and why) you agree or disagree with the following argument: â€Å"If employees have the right to keep guns in the parking lot, then they also have a right to bring them into workplace. After all, we’re only talking about licensed, responsible owners, and same rationale applies: An employee might need a weapon for self-protection. What if a lunatic starts shooting up the company? † I disagree with part of this statement and agree with the other part.I agree with the statement because this is how people think, if they are allowed to bring their guns in the parking lot why not push the boundary and take it inside the building. Yah, you’re talking about licensed, responsible owners, and same rationale applies: An employee might need a weapon for self-protection. What if a lunatic starts shooting up the company? † What if the people allowed to carry that gun on property becomes the lunatic? When policies are put into place there’s usually a reason or a prevention method. Allowing people to have a weapon that close if they get mad or fired would be irresponsib le on the company’s part.

Downfall of Macbeth Essay

The tragedy of â€Å"Macbeth,† by William Shakespeare, follows the fall of Macbeth from a man in a position of power with a contented life, to a man with nothing but â€Å"mouth honor† and a corrupted soul. In this essay, I wish to show to what extent Macbeth’s tragedy was his own fault. The downfall of Macbeth begins early on in the play when he and Banquo (a fellow Scottish noble) meet the witches. The witches waylay Macbeth and Banquo whilst they were on their way to meet Duncan, King of Scotland. They decide to listen to the witches, out of sheer curiosity. The three witches greet Macbeth as â€Å"Thane of Glamis†, the title he already holds, and begin to tell the two nobles of things to come, and prophesies that Macbeth will become Thane of Cawdor, and the King of Scotland. Macbeth asks how they know of his current title, and laughs at the following two prophesies. The witches ignore his questions, and tell Banquo of how he will not be king, but his sons will be kings. Instead of just ignoring the witches, the statement of his current title intrigues Macbeth and he follows the witches to try and get them to tell him more. Stay you imperfect speakers, tell me more† says Macbeth, showing that he is indeed interested in what the witches have to say. The witches disappear, and Macbeth dismisses them, and he and Banquo ride off. The witches appearance, and Macbeth becoming intrigued may amount to his downfall, but I believe that they were merely the ‘helping hand’ for Macbeth who’s own weak will and other events where the catalyst for his eventual death. At this point, Macbeth is still a highly respected man, and is about to get more respect from Duncan, for defending Scotland from the invading forces of Norway. The messengers who tell Duncan of Macbeth’s deeds portray him as a man of great courage, who showed no fear in the battles. Duncan sends a messenger to tell Macbeth of his reward for his great deeds. Two messengers to greet Macbeth with the news of Duncan’s reward: he is to be made Thane of Cawdor. â€Å"Why do you dress me in borrowed robes? † asks the startled Macbeth, as the messengers begin to explain how the last Thane of Cawdor was helping the Norwegians invade. Aside, he says, â€Å"Two truths are told, as happy prologues to the swelling act†¦Ã¢â‚¬  obviously relating to the first two prophecies the witches made. He now asks Banquo, aside, whether or not he believes the witches now that Macbeth’s second prophecy has come true. Banquo says he is wary and that he really doesn’t want anything to do with these witches, but he will merely sit back and let the prophecies run their course. Macbeth seemingly decides to follow Banquo’s idea, and makes an agreement with himself â€Å"If chance will have me king, why, chances may crown me, without my stir†. Macbeth decides to write to his wife and tell her of his new title, a fatal mistake in my opinion, since his wife reacts to the letter in a totally unexpected way. All of a sudden, Lady Macbeth decides to make a push to get her husband to make the effort to fulfil the third prophecy. Meanwhile, Duncan names his son as the next king, and Macbeth becomes bitter, and looks towards the prophecies for his next move; â€Å"That is a step on which I must fall down, or else o’erleap†¦Ã¢â‚¬  Clearly Macbeth has decided that he will now ‘stir’, and make some move to become king. Back with Lady Macbeth at Macbeth’s castle, she is reading Macbeth’s letter. She reads about his new title, and the mentions of the witches’ prophecies. Lady Macbeth first starts off by thinking about how she can get her husband to become a king, and concludes that she’ll have to make some effort to get her husband to do whatever it takes to get him to be king. A messenger, who brings news that Duncan wishes to stay at Macbeth’s castle, interrupts her thoughts. Lady Macbeth decides, almost instantly, that she will persuade her husband to kill Duncan so he can become king. Whilst in the middle of her thoughts, Macbeth returns home. They talk, and Lady Macbeth brings up the subject of getting rid of Duncan so he can be king. Macbeth appears shocked although was secretly thinking the same thing, and tries to dismiss the idea. Underneath, however, he wants to go along with the idea so he can become king. His underlying motives become clear when he decides that he will do the evil thing, and is going to kill Duncan. â€Å"We will speak further,† he says, making his intentions apparent to the audience. Although unsure, he will not totally dismiss the idea, and is even considering it. Lady Macbeth now knows that she has him within her grasp, nd she will now make sure that she wins him completely over. In my opinion, not making his mind up creates a chance for Lady Macbeth. She sees this uncertainty and later exploits his unwillingness to make decisions. A short while later, Duncan arrives, accompanied by all of his Thanes. They all feast, and drink to the success of the battle against Norway. As the night wears on, Macbeth has to time to contemplate the consequences of killing Duncan. Macbeth makes the moral decision not to proceed saying; â€Å"We will proceed no further in this business. He (Duncan) hath honoured me of late, and I have bought golden opinions from all sorts of people, which would be worn now in the newest gloss, not cast aside so soon†. Macbeth attempts to give excuse for not proceeding, but fails to give any proper reasons for it. The only advantage he sees for not killing Duncan is that he respects him, and by killing him it would be disrespecting him. I believe that this is not a valid reason for committing murder, and shows Macbeth’s underlying ambition to become king. By putting forward pithy excuses Macbeth makes his ambition very clear to the reader. Lady Macbeth is not swayed by his pathetic excuses, and she knows that secretly, Macbeth wants the same things she does. In an attempt to convince Macbeth to continue with the plan, she first insults his manhood â€Å"When you durst do it, you were a man; And to be more than what you were, you would be so much more the man†¦Ã¢â‚¬ and accuses him of being cowardly for not sticking to the plan. She then attacks his ego further by saying â€Å"From this time such I account thy love† and accuses him of not loving her. For Macbeth, this is the final straw, and he gives in. Lady Macbeth plans the murder. When Macbeth goes to murder Duncan, he still doubts himself, and even starts seeing things as he approaches Duncan’s room. Upon committing the murder, Macbeth finds himself in a state. Lady Macbeth attempts to clean him up, and make him appear well, but now Macbeth has lost all control. This murder of Duncan leads to the destruction of Macbeth. Aware of any possible opposition, Macbeth begins spying and murdering people. There are also psychological problems that Macbeth has which lead to his destruction. This is shown by his brief madness after Banquo’s murder when he sees Banquo’s ghost. The tragedy ends when Macbeth is slain by Macduff who, with many others, find out about what horrific things Macbeth has done. Macbeth begins to get paranoid about Banquo, and feels that he should be killed so as to stop him from being exposed. â€Å"So is he mine; and in such bloody distance that every moment of his being thrusts against my nearest life;† Macbeth says, aware that the only way to truly silence Banquo is to have him killed. At the banquet scene, Macbeth sees Banquo’s ghost, showing that he has indeed gone mad. Even in insanity, he feels guilty. â€Å"Avaunt, and quit my sight! Let the earth hide thee! † he says, his conscience acting on him and showing his remorse. Macbeth has finally gone mad, and it was all due to his ambition and want to be king. He goes on to become entirely evil, as he visits the witches again and again, seeking solace for his crimes, and answers to his impending doom. He begins to stop feeling remorse and guilt for his actions, and eventually becomes a cruel, twisted man. His wife falls ill, and he shows no compassion towards her, instead saying everything would be better once she is dead. This is near the end of the play and where Macbeth slowly returns from his evil side, feeling remorse for his actions finally. When the English army and Macduff advance on his castle he becomes the courageous Macbeth once again, and when he finally comes to fight Macduff, he is back to the brave and bold Macbeth at the start of the play. With his wife dead, he feels more able to do what he wants. The main people to blame for Macbeth’s tragedy were his wife, and Macbeth himself, and this is shown all the way through the play (Lady Macbeth willing him to murder, Macbeth being easily convinced etc) there some unfortunate circumstances that contributed to Macbeth’s downfall, such as Duncan making his son king instead of Macbeth, and Duncan putting his trust in Macbeth by coming to his castle, but none were as major a cause as Macbeth’s personality fault and his manipulative wife. To conclude, the blame for Macbeth’s tragedy should be placed on his head and his wife’s, due to his personality defect (ambition and a weak will) and her persuasiveness (pushing him to fulfil his ambition). The combination of these two defects and Duncan staying at Macbeth’s castle caused the entire play and tragedy to unfold.

LPN to RN Transitions Essay Example | Topics and Well Written Essays - 750 words

LPN to RN Transitions - Essay Example Registered nursing is at the top of the nursing team. They are holders of a degree or a three-year diploma course. Registered nursing have expanded duties in the field but their main role is taking care of the patients and ensuring that patients are living in a safe and a healthy environment. Another role is taking orders from the head of the nursing staff and assessing the patient’s condition by coming up with a plan to take care of a patient. The care plan is determined by many factors including the age, sex, religion, dietary needs and the willingness of the family support. Registered nurse is also responsible for triage, a practice that determines which patients should receive treatment first based on the showing symptoms and major complaints. Nurses with Bachelor’s Degrees have greater opportunities in the careers as they are involved in research programs in the nursing field that helps in promoting effective health care in the community and in health facilities. As such, the registered nurses are also involved in nursing science, which entails scientific research in health care (Dreher, 2011). Leadership role in Registered nurses ensures improved health care in patients and helps nurses in acquiring essential skills and abilities required in the health system. For instance, carrying re-education projects to improve the effectiveness in nursing. LPN nurses also referred to as vocational nurses have about a year in the nursing school to attain a certificate in the field. LPN nurses can perform most RN duties but they assess duties as directed by the physician. LPN role ranges from giving medication to patients as directed by the physician, injections and immunizations, entering data in the computer system, taking medical history, checking crucial sign encompassing temperature and high blood pressure. They are also responsible in checking wound care, which include cleaning and bandaging an injury.

Transnational Corporations Essay Example | Topics and Well Written Essays - 2250 words

Transnational Corporations - Essay Example The transnational corporations have large revenues and can exercise more power than the individual states across which they operate. The companies ‘command enormous financial resources, possess vast technical resources, and they have extensive global reach’ (CSIDS, n.d, p.1). It has been noted that the combined revenue of General Motors and Ford is larger than the total Gross Domestic Product (GDP) for the countries in Sub-Saharan Africa (Ward, 2003). Comparable statistics and facts apply to other giant automobile corporations in the world and the individual economy of certain countries. It then beats logic in the kind of influence that these transnational corporations can have on the regional and global economy. As such, the transnational corporations have significant market power (Ietto-Gillies, 2012). They play significant roles and they have negative and positive impacts on the local, regional, and global development issues. This paper focuses on the roles that the T NCs play in shaping the global economy and the significant impacts that have been observed from the move to go global. The domination of these large corporations in different sector of the world economy is illustrated. The impacts of the TNC Significant developments have been recorded in the foreign direct investments by the transnational corporations since the 1980s with the TNCs taking different forms (Lundan, 2011, p.640). Significant increases have also been observed in the worth of the FDIs. For instance, the total global foreign direct investment in 2002 amounted to about $651bn (CSIDS, n.d). The developed nations are the major home countries for the foreign direct investors and the countries receive much of the proceeds from the investments. Much literature is available that focus on the impacts of TNCs on the home countries (the developed nations) and the literatures conclude that the outflows in Foreign direct investments relates positively with the net productivity in the home country (Sauvant, 2008, p.229). To the developing nations, the foreign direct investments provide the largest source of external finance to the home economy (CSIDS, n.d). Nonetheless, it is still debatable as to whether the transnational corporations help in developing this underdeveloped nations or the corporations are just in pursuit of their interest and do not care about their negative impacts on the society. In as much as the organizations may be considered sources of funds to the recipient nations, it is also worthwhile to note that the organizations are out to seek profits. Efforts to have a state of balance between these two conflicting roles (a profit-seeking organization and source of funds to the recipient country) lead to mixture of negative impacts of the transnational corporations on the national and regional economies. Potential benefits of TNCs One of the positive impacts of the TNCs is that they create employment opportunities in the recipient nations (CSIDS, n .d). Availability of cheap labor is one among the factors that drive a company to go global and establish its FDIs in

Nation Branding Essay Example | Topics and Well Written Essays - 500 words

Nation Branding - Essay Example In as much as the country has various setbacks, there are various ways the country can exploit in order to realize positive image overseas. The world economic outlook of a country is a tremendously influential factor, which can either attract or chase investors. It is in this regards that many countries try to maintain an economic outlook, which draws a positive picture, thereby attracting investors. This is an opportunity; Japan can use to brand, the county’s image, considering stability, which the country has, witnessed from the past (Dinnie 10). For example, it is a country in the midst of transforming its tax system from the previous large system tax-free saving accounts to lowered individual marginal taxes. The new system allows a reduction in statutory corporation rate. This is a chance, which investors can make use of in various areas of investment. In as much as the new tax system takes into effect a new income tax, it gets evidenced that it encourages investors. Consequently, Japan is a country endorsed with many tourist facilities, which it can use to collect revenue from tourists. For instance, Kobe tourist attractions spread like a ribbon for a distance of 30 km (Kis 23). The city is endorsed with various facilities including the Akashi Kaikyo Bridge and Arima, one of the oldest areas of Japan characterized by many springs and steam jets. Tourism is a sector, which helps in the collection of many funds from tourists and has seen the economic growth of many institutions. This, therefore, is a chance the Japanese government can use to brand the country, hence changing the outlook from the various world perspectives (Jincui 01). Last but importantly, Japan is one of the countries considered secure in terms terrorist attacks, as well as minor security problems. As compared to other countries like the United States of America, Japan does not have political enemies. This makes it a neutral country, which when invest or

Investment report for Apple company Case Study Example | Topics and Well Written Essays - 1250 words

Investment report for Apple company - Case Study Example Apple Inc. was founded by Steve Jobs in 1984. The innovative new computer brand that Apple released in 1984 was the Macintouch. Today Macintouch computers are consider top quality and best performing computers in the world. â€Å"The Company designs, manufactures, and markets mobile communication and media devices, personal computers, and portable digital music players, and sells a variety of related software, services, peripherals, networking solutions, and third-party digital content and applications† (Investorapple, 2013) The CEO of the company is Timothy Cook. Apple has 80,300 employees. Its stocks are traded in the NASDAQ under the symbol AAPL and are currently priced at $531.17 (Nasdaq, 2014). The company has always pride itself in being innovative. In 2007 Apple revolutionized the cellular industry with the invention of the first smartphone in the world, the iPhone. In 2013 one billion smartphones were sold worldwide (Plunkettresearchonline, 2014). The organization supp orts the environment through the Apple recycling program. The organization also powers all its data centers using renewable energy (Apple, 2014). A horizontal analysis is an analytic tool that shows the changes in the accounts of the common size financial statements from year to year. The differences are shown in terms of dollar amounts and percentage. Apple’s horizontal analysis for fiscal years 2013 and 2012 is illustrated below. The total liabilities of Apple in 2013 increased by 44.24%, while its current liabilities rose by 13.27%. An increase in liability is an undesirable outcome. In 2013 Apple’s total revenues were $170.91 billion. The firm experienced a sales growth of 9.20%. Apple had a net income of $37.04 billion. The net income of the organization decreased by 11.25% mainly due to the fact that its cost of goods sold went up by 21.36% and its selling, general, and administrative expenses rose by 7.87%. The

PRODUCT ASSESSMENT Term Paper Example | Topics and Well Written Essays - 1500 words

PRODUCT ASSESSMENT - Term Paper Example Why, though, is dial-up Internet service in the decline stage along the product life cycle? According to the U.S. Census conducted in 2010, metropolitan areas experienced much faster growth than rural regions, by a rate of 4.9 percent (census.gov, 2011). This means that consumers are seeking opportunities to migrate to metropolitan or suburban areas at a much faster pace than those looking for rural living opportunities. It is in the urban regions of the United States where major, contemporary Internet providers have developed the appropriate technologies and support tools to sustain broadband Internet access as well as service providers along service networks that provide multitudes of options, today, for abandoning dial-up services. In essence, these migrating shifts away from rural locations gave consumers much more opportunities to explore faster and more efficient non-dial-up Internet service providers. Rationale for Explaining Dial-Up Decline According to Michael Porter (2011), a respected business theorist, threats to sustaining a product and ensuring longevity, thus avoiding decline, include threats of substitutes on the market. During the late 1990s and early 2000s, it was commonplace while Internet services were in the introductory and growth stages to maintain dial-up services due to limited providers and appropriate network developments across the country designed to support faster Internet services. Political de-regulation of Internet services, along with both private and public corporation investment into developing new Internet technologies, provided a foundation for the emergence of many service providers (such as Verizon and Comcast) to put substitutes into the market. With growth in competition, the economic-related benefits to consumers requiring Internet services began to witness various price competitions occurring, thereby providing more value to consumers to abandon dial-up Internet service providers. Up until just the last five years, it was common for dial-up Internet to range between $15 and $25 monthly. It was only upon development of appropriate Internet networks and mobile Internet technologies that dial-up service providers were forced to dramatically lower dial-up services in order to maintain competitiveness against major Internet providers now emerging all across the country. Shifts in social lifestyle also changed the dynamics that no longer made dial-up services viable to sustain busy lifestyle and professionalism. With the ability to now access the Internet using mobile devices (i.e. smartphones), consumers could access the Internet out of their bricks-and-mortar businesses and homes, making dial-up service both impractical and not nearly as reliable. Buyers, due to concentrated and saturated competitive markets, now maintained considerable buying power as switching costs from moving from one provider to another competitor were no longer high as they were in the day of growth of dial-up services. Change s in social lifestyle, as aforementioned, added a new type of pricing transparency for the many broadband and mobile Internet providers now on the market, giving consumers an advantage in choice and purchase selection opportunities. Recommendations for Potential Action The first recommendation would be for dial-up service providers to reposition dial-up services to maintain unique innovations not found with other broadband or mobile providers currently offering

International Commercial Arbitration Law Assignment

International Commercial Arbitration Law - Assignment Example The paper tells that an international commercial arbitration has been an element of study owing to some of the unique features it is associated with. In the era of globalization, the volume of disputes between parties in trade has increased significantly, and often the judgment provided by the local jurisdiction fails to satisfy the parties to the action. The delay in the procedure of judgment also hampers trade activities between them and becomes significant in determining market conditions. International commercial arbitration tries to solve a few of these problems by providing a mutual solution to the issues on the basis of judgment provided outside the legal framework of either country. In matters of international arbitration, the agreement covering arbitration has gained importance over the years. The method of international arbitration is widely popular for resolving disputes that arise from international commercial agreements and a wide variety of international relationships. The main advantage of international arbitration lies in the fact that parties originating from different backgrounds of culture and legal framework can resolve disputes without the consideration and formalities of the legal systems of their respective countries. Other advantages of international arbitration include the fact that it allows the avoidance of uncertainty and the practices associated with local courts regarding the procedure of litigation so that quick and efficient decisions can be reached and the dispute resolved within a short time. The process of international arbitration also grants a high amount of flexibility to the parties in the process of designing the arbitral procedures. In casesof international commercial transactions, the parties have various choices in including mechanisms for resolving disputes that arise under the contract. If a party in the arbitration remains silent for a period of time, then the disaffected party can initiate legal proceedings in a co urt and can attain jurisdiction over the other with ease (Redfern, 2005: 15). International Commercial Arbitration International commercial arbitration tends to resolve disputesinvolving commercial contracts under the guidance and supervision of a number of international institutions and bodies framing international rules. The popular bodies that deal with the issues are the International Chamber of Commerce and the International Centre for Dispute Resolution. Most of these bodies use the â€Å"terms of reference† to summarize the claims and issues of the disputes in a particular procedure, and this is then signed by the parties before the start of the legal proceedings. One of the important characteristics of international commercial arbitration is that thearbitrators try to mitigate disputes before moving to the courts. The decision imposed by international commercial arbitration is binding on both parties. Another attraction of international commercial arbitration is that distrust of foreign legal systems often influences the parties in the action, as does the anticipated cost of using such legal systems. However, switching to international commercial arbitration reduces these types of risks considerably. Arbitrators have significant

Political Dynasty Essay Example for Free

Political Dynasty Essay The Philippine Constitution is a Social Contract which embodies the fundamental principles and policies, according to which the Filipino people are governed by the State. The fundamental principles are abstract and as such they cover every aspect of the life of the Filipino people; while the fundamental policies cover specific areas of application of those principles. The fundamental principles remain fixed and permanent, but the policies built upon those principles can be modified or repealed by legislation to suit the needs of the times. The title is product of my out of the box philosophizing about the provisions of Section 1 and Section 26 taken together of Article II of our Constitution. I must say that philosophizing does not tell us my conclusions and/or thoughts are right or wrong, true or false, but it has certainly given me the basis upon which to present my meta-understanding of Section 1 and Section 26: Article II, Section 1 says: â€Å"The Philippines is a democratic and republican state. Sovereignty resides in the people and all government authority emanates from them. † This is the most basic principle of the Constitution, and it refers to a natural law as formulated and accepted in the mind; it refers also to essential truth upon which other truths are based. Article II, Section 26: â€Å"The State shall guarantee equal access to opportunities for public service, and prohibit political dynasties as may be defined by law. † This is a policy built upon the principle of Section 1, and it refers to a planned line of conduct in the light of which individual decisions on political dynasties are made and coordination is achieved. Moreover, political dynasties refer to the line of politicians of the same families. Every coin has two inseparable opposite sides – the head and the tail yet they complement each other as they are opposed to each other to constitute only one coin. Similarly, the political issue on dynasty has two opposite yet complementary sides (a) â€Å"the principle of political dynasty† of Section 1 and (b) the â€Å"the policy of political dynasty† of Section 26. Both Sections constitute one Article II. The policy of Section 26 names the specific area of application of the principle of Section 1 of the same Article II. The policy of Section 26 is built upon the basic principle of Section 1. Moreover, the fundamental principle of Section 1 remain fixed and permanent, but policies of Section 3 can be are modified or repealed by legislation to suit the needs and demands of the times. The People: The Creators and Masters of Political Dynasties The phrase â€Å"sovereignty resides in the people, and all government authority emanates from them† clearly shows that the people are the habitat of the sovereignty. However, â€Å"people† have two distinct yet mutually complementary meanings, namely, â€Å"people as electorate† which is the source of political power of elected politicians and â€Å"people as corporate nation† which is the reason for being of elected politicians. These â€Å"dual meanings of people† effectively signify that the elected politicians are â€Å"public servants† of the people; hence the people are their â€Å"boss and master† in our democratic and republican state, not the way around By virtue of their sovereign power, the people are superior to any and all existing political dynasties, whose reason for being is service to their masters, the people. On moral grounds, the people must be awakened to the reality that they are the boss of political dynasties, and therefore they have no reason to fear the, before, during, and after political elections. Centrality of Morality in the Constitution The centrality of morality to our Constitution is evident in the Preamble, in the imploration to Almighty God for aid to build a just and humane society and to establish a Government that shall embody the Filipino ideals and aspirations and promote their common good under a regime of truth, justice, freedom, love, equality, and peace. The rest of the Constitution revolves around these moral ideals and moral values. These are the moral foundations of the Social Ethics Society. There are socio-economic phenomena in many areas of the country where the life-style and the exercise of political power by political dynasties is betrayal of public trust, because it is not in accord with the following moral imperatives and criteria of right and wrong in public service: â€Å"Public office is a public trust. Public officers and employees must at all times accountable to the people, serve them with utmost responsibility, integrity, loyalty, and efficiency; act with patriotism and justice, and lead modest life†. (Article X on Accountability) Every elected politician in the public service is bound to abide by those mandates. Congress had passed anti-graft and anti-corruption laws, e. g. RA No. 6713, also known as Code of Ethics for Government Officials and Employees, in the public service. However, it appears that many of our elected politicians pay only â€Å"lip service† to anti-Graft and Anti-Corruptions laws. For instance, there are widespread phenomena of bribery and corruption in the public service, reportedly perpetuated by corrupt politician, many of whom are allegedly members of political dynasties. Centrality of Morality to Legality The Preamble provides the moral grounds and the foundation of ethical politics of several Articles of the Constitution. No statutory law is enforceable if it is unconstitutional; and the Constitution cannot be enforced if it is immoral. The bottom line any enabling law on political dynasty is legally binding upon the Filipinos, only if it is constitutional and moral. A law that is moral is always constitutional, but a law that is constitutional is not necessarily moral. A Moral and Ethical Proposal I believe the policy of Section 26 which â€Å"prohibits political dynasties as may be defined by law† has two distinct opposite sides, (1) â€Å"the letter of the Constitution† which is the legalistic side, and (2) the â€Å"spirit of the Constitution† which is the ethical side. The pro-political dynasty advocates and promoters behave in accord with legal politics. Their action is legal so long as there is no law defining and enabling the constitutional prohibition against political dynasties. Therefore, the anti-dynasty advocates and promoters should stand on moral and ethical grounds against political dynasties. It is my proposal on moral and ethical grounds that the anti-dynasty advocates should develop and promote the concept of â€Å"political dynasty of the people† based on the principle of Section 1 face-to-face the â€Å"political dynasties of oligarchs† based on the policy of Section 26 but built upon the principle of Section 1. When there is a conflict between a principle and its policy, the principle should prevail over its policy. Moral, Ethical, and Legal Practices in Politics Moral and ethical are similar in meaning in that they both have to do with the difference between right and wrong. They are dissimilar in meaning in that ethical tends to refer to a code, system, theory, or standard of judging rightness or wrongness of moral behavior; whereas moral tends to refer to more concrete choices and issues that arouse strong feelings. In other words, moral refers to good and evil, while ethical refers to right and wrong. Because of the untruthful disclosure of his SALN per Code of Ethics, former SC Chief Justice Renato Corona was found ethically wanting for which he was impeached, despite his superior legalistic knowledge of law; Hence, we could say that â€Å"what is moral is always ethical, but what is ethical is not necessarily moral. † Hence, when an elected politician acts according to RA 6714, his behavior is ethical as well as legal â€Å"what is ethical is always legal, but what is legal is not necessarily ethical†. The Pursuit of Ethical Politics Our major problem in the pursuit of ethical politics is the lack of political will on the part of the people as electorate. Let us awaken and educate their political consciousness, and empower their political will by making them conscious of their being the political dynasty that is superior over all existing political dynasties of oligarchs† per mandate of Article II, Section 1 that the people are the habitat of sovereign power, but the exercise of such pwer is delegated and vested upon elected politicians. Assume that Congress would never pass the law enabling the policy against political dynasties; let us then resort to the principle of Section 1 in Article II. This principle does not require any enabling law because it is precisely the ultimate basis of all enabling laws. This is the principle why the political candidates try to win the votes of the people during political campaigns. We have indeed laws prescribing the requirements of the policy to vote. The Social Ethics Society can start the movement to marginalize the political dynasties,, if not altogether eliminate them eventually from the political landscape of the Philippine.

Psychology of Soldier Training in the UK

Psychology of Soldier Training in the UK Bullying, humiliation and exclusion are all part of the British culture.   How does this assertion sit with our duty to produce trained soldiers for the front line by running hard, relevant and fair training? First, it is essential to understand that the larger British cultural psychology exerts its oppression through mostly subtle forms of psychological warfare.   Repression of emotions, fastidiousness, fixation on decorum and protocol, and elite classism are all fixtures of the British school system and of British adult society.   This is no accident the hallmarks of British socialization are present in military training as well.   In the case of the military, the bullying, humiliation, and exclusion are achieved through both subtle and overt psychological warfare, and even violence.   As military expert Dr Hans Pols observes, â€Å"cultures of denigration and harassment have existed in all army training camps.†Ã‚   (Das, 2004)   Why is this the case?   Surely these characteristics do not exist arbitrarily in either British society or the military itself.   The overarching reason is a conceptually simple one: an historical preoccupation with maintaining the culture of superiority: â€Å"Throughout history the superiority of the winners has been connected to a denial of feelings what, in the British Empire, was called the ‘stiff upper lip.’ The conquerors of nature and ‘natives’ claimed their right to the world as their possession because they had first conquered themselves.†Ã‚   (Davey, 1999) With respect to the military, specifically, what is the point of such institutionalized human denigration in our organizations?   According to Dr Pols, the implicit philosophy behind bullying and denigration is based on the idea that to be capable of dealing with the rigours of battle, soldiers need to be toughened up by being subjected to conditions that test their resolve and resilience. Also, to create an effective army, soldiers need to lose their individuality and personality to become part of an efficient fighting unit †¦ A culture of bullying and denigration is aimed at removing individual peculiarities and characteristics that, in daily life, make people endearing and special.   (Das, 2004) Dr Pols’ last sentence is telling, as it speaks to the dehumanizing power of corporations and other patriarchal, top-down institutions within British society – in fact, â€Å"similar patterns of behaviour [to the military] can be seen in other, usually male, institutions such as the police force, sporting clubs and college fraternities.† (Das, 2004)   This is not recent phenomenology; as far back as the war with the United States for its independence, the British were invoking similarly disturbing psychological motifs, characterizing their bombardment of a colonial harbor in 1776 as:   â€Å"a rod of correction†¦ we must assure them,† the Tory naval officer continued, â€Å"that we dread the very thoughts of an absolute independency; and that we see no prospect of security or happiness but under the powerful protection and mild superintendency of the mother country.† (Wyatt-Brown, 2004)   The colonialist mentality inherent in the above ex ample was rife throughout British history throughout its Empire, including its occupation of India and Iraq, and indeed colonialism can be seen as the outward, global manifestation of the haughty, elitist patriarchal mindset around which British society was organized for the better part of 400 years.  Ã‚   To be fair, there are valid reasons for the military to employ certain tactics within their training protocols that we might find unacceptably barbaric in schools and universities.   As alluded to above, soldiers in modern warfare experience stresses, pressures, and horrors that are inconceivable to civilians.   Even fleeting psychological weaknesses or hesitations in judgment during combat can be fatal, and so soldiers’ responses to battlefield pressures must be so deeply ingrained as to be virtually instinctive.   There is often no time for polite university seminar-type committee discussions in war.   A soldier must be trained to obey and execute orders that may threaten their lives, and insofar as military training utilizes dehumanising and de-individualising psychological techniques to enable soldiers to respond properly in battle, it is arguably a necessary evil. But what are the consequences to a soldier, who is, after all, a human being, outside of the context of the battlefield, after receiving this training?   The evidence, particularly incorporating new evidence from the horrific recent war in Iraq, suggests grim news:   â€Å"Rituals involving physical and psychological humiliation, as well as sexual abuse, are not confined to overseas operations, but are also present at home. A survey carried out by the Ministry of Defence in 2002 found that more than 40% of British soldiers believed the army had a problem with bullying, sexual discrimination and harassment.† (Bourke, 2005) The war in Iraq, in fact, points to an acute need for military training that strikes an appropriate balance between the need to turn men and women into auto-robotic killing machines and the understanding that the work of doing so is supposed to facilitate a greater good, such as the liberation of oppressed peoples.   Iraqis endured decades of humiliation, torture, murder, and oppression under Saddam Hussein and his Baath party; the British participation in the war to liberate the Iraqis was supposed to be a showcase in British military superiority, not just in training but in honourable behavior:   The British army prides itself on its professionalism and its discipline. Its adherence to codes of honourable behaviour in battle is central to the way the British army markets itself, particularly in opposition to other fighting forces (such as the Germans during the two world wars, and the Americans in the current conflict).   (Bourke, 2005) Is it possible to create a soldier whose psychology can simultaneously contain the instinct to kill and the instinct for compassion?   Can a British soldier decapitate a 17-year old Iraqi insurgent with a burst of machine-gun fire, and then immediately go to a nearby 17-year old civilian female witness and quell her sobbing with a comforting embrace?   Idealism prays that the answer is yes – realism will dictate that serious institutional changes must be effected in British training methodology. Though the deeply ingrained conservative cultural elements within the military have and will react in horror to such a suggestion, it is utterly imperative, if British society wishes to consider itself civilised, that military training do only what is required to form a cohesive fighting unit, but not be extremist in goading soldiers to behave like monsters.   In World War II training, â€Å"racism †¦ played a significant part. As drill instructors told recruits: ‘Youre not going to Europe, youre going to the Pacific. Dont hesitate to fight the Japs dirty.’ Classifying the Japanese as inhuman meant they all became fair game.†Ã‚   (Bourke, 2005).   The atrocities reported from Iraq suggest similarly misguided training instincts.   It is no longer acceptable to write these incidents off as ‘collateral damage,’ the inimitably clinical American military term for civilian casualties.   As paradoxically difficult as it may be, we institutionali ze compassion in the military at the same time as we institutionalize brutality. BIBLIOGRAPHY Davey, Brian.   â€Å"The Psychology of Racism,†   A Strategy for Losers: Helping the Last to Come First in The Ecological Transformation of Society, 1999. Das, Sushi.   â€Å"A Brutal Business†, The Melbourne Age, November 22, 2004. Wyatt-Brown, Bertram.   â€Å"Honor and America’s Wars: From the Revolution to Mexican Conquest†, The 2004 James Pinckney Harrison Lecture, Andrews Hall 101, March 22, 2004. Bourke, Joanna.   â€Å"From Surrey to Basra, Abuse is a Fact of British Army Life†, The Guardian U.K., February 25, 2005.

Light Emitting Diode | Dissertation

Light Emitting Diode | Dissertation Introduction Alight-emitting diode(LED) is a semiconductor light source. LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. Introduced as a practical electronic component in 1962, early LEDs emitted low-intensity red light, but modern versions are available across thevisible, ultraviolet and infrared wavelengths, with very high brightness. When a light-emitting diodeis forward biased (switched on), electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is calledelectroluminescenceand thecolorof the light (corresponding to the energy of the photon) is determined by the energy gap of the semiconductor. An LED is often small in area (less than 1mm2), and integrated optical components may be used to shape its radiation pattern.LEDs present manyadvantagesover incandescent light sources includinglower energy consumption, longerlifetime, improved robustness, smaller size, faster switching, and greater durability and reliability. LEDs powerful enough for room lighting are relatively expensive and require more precise current andheat managementthan compactfluorescent lampsources of comparable output. Light-emitting diodes are used in applications as diverse as replacements foraviation lighting,automotive lighting(particularly brake lamps, turn signals and indicators) as well as intraffic signals. The compact size, the possibility of narrow bandwidth, switching speed, and extreme reliability of LEDs has allowed new text and video displays and sensors to be developed, while their high switching rates are also useful in advanced communications technology.InfraredLEDs are also used in theremote controlunits of many commercial products including televisions, DVD players, and other domestic appliances. History Discoveries and early devices Green electroluminescence from a point contact on a crystal ofSiCrecreatesH. J. Rounds original experiment from 1907. Electroluminescenceas a phenomenon was discovered in 1907 by the British experimenterH. J. RoundofMarconi Labs, using a crystal ofsilicon carbideand acats-whisker detector.RussianOleg Vladimirovich Losevreported on the creation of a first LED in 1927.His research was distributed in Russian, German and British scientific journals, but no practical use was made of the discovery for several decades. Rubin Braunstein of theRadio Corporation of Americareported on infrared emission fromgallium arsenide(GaAs) and other semiconductor alloys in 1955.Braunstein observed infrared emission generated by simple diode structures usinggallium antimonide(GaSb), GaAs,indium phosphide(InP), andsilicon-germanium(SiGe) alloys at room temperature and at 77kelvin. In 1961, American experimenters Robert Biard and Gary Pittman working atTexas Instruments,found that GaAs emitted infrared radiation when electric current was applied and received the patent for the infrared LED. The first practical visible-spectrum (red) LED was developed in 1962 byNick Holonyak Jr., while working atGeneral Electric Company.Holonyak is seen as the father of the light-emitting diode.M. George Craford,a former graduate student of Holonyak, invented the first yellow LED and improved the brightness of red and red-orange LEDs by a factor of ten in 1972. In 1976, T.P. Pearsall created the first high-brightness, high efficiency LEDs for optical fiber telecommunications by inventing new semiconductor materials specifically adapted to optical fiber transmission wavelengths. Until 1968, visible and infrared LEDs were extremely costly, on the order of US $200 per unit, and so had little practical use.TheMonsanto Companywas the first organization to mass-produce visible LEDs, using gallium arsenide phosphide in 1968 to produce red LEDs suitable for indicators. Hewlett Packard(HP) introduced LEDs in 1968, initially using GaAsP supplied by Monsanto. The technology proved to have major uses for alphanumeric displays and was integrated into HPs early handheld calculators. In the 1970s commercially successful LED devices at fewer than five cents each were produced by Fairchild Optoelectronics. These devices employed compound semiconductor chips fabricated with theplanar processinvented by Dr. Jean Hoerni atFairchild Semiconductor.The combination of planar processing for chip fabrication and innovative packaging methods enabled the team at Fairchild led by optoelectronics pioneer Thomas Brandt to achieve the needed cost reductions. These methods continue to be u sed by LED producers. History Of LEDs and LED Technology Light Emitting Diode (LED) Light Emitting Diode (LED) is essentially a PN junction semiconductor diode that emits a monochromatic (single color) light when operated in a forward biased direction. The basic structure of an LED consists of the die or light emitting semiconductor material, a lead frame where the die is actually placed, and the encapsulation epoxy which surrounds and protects the die (Figure 1). The first commercially usable LEDs were developed in the 1960s by combining three primary elements: gallium, arsenic and phosphorus (GaAsP) to obtain a 655nm red light source. Although the luminous intensity was very low with brightness levels of approximately 1-10mcd @ 20mA, they still found use in a variety of applications, primarily as indicators. Following GaAsP, GaP, or gallium phosphide, red LEDs were developed. These devices were found to exhibit very high quantum efficiencies, however, they played only a minor role in the growth of new applications for LEDs. This was due to two reasons: First, the 700nm wavelength emission is in a spectral region where the sensitivity level of the human eye is very low (Figure 2) and therefore, it does not appear to be very bright even though the efficiency is high (the human eye is most responsive to yellow-green light). Second, this high efficiency is only achieved at low currents. As the current increases, the efficiency decreases. This pr oves to be a disadvantage to users such as outdoor message sign manufacturers who typically multiplex their LEDs at high currents to achieve brightness levels similar to that of DC continuous operation. As a result, GaP red LEDs are currently used in only a limited number of applications. As LED technology progressed through the 1970s, additional colors and wavelengths became available. The most common materials were GaP green and red, GaAsP orange or high efficiency red and GaAsP yellow, all of which are still used today (Table3). The trend towards more practical applications was also beginning to develop. LEDs were found in such products as calculators, digital watches and test equipment. Although the reliability of LEDs has always been superior to that of incandescent, neon etc., the failure rate of early devices was much higher than current technology now achieves. This was due in part to the actual component assembly that was primarily manual in nature. Individual operators performed such tasks as dispensing epoxy, placing the die into position, and mixing epoxy all by hand. This resulted in defects such as epoxy slop which caused VF (forward voltage) and VR (reverse voltage) leakage or even shorting of the PN junction. In addition, the growth methods and materia ls used were not as refined as they are today. High numbers of defects in the crystal, substrate and epitaxial layers resulted in reduced efficiency and shorter device lifetimes. Gallium Aluminum Arsenide It wasnt until the 1980s when a new material, GaAlAs (gallium aluminum arsenide) was developed, that a rapid growth in the use ofLEDsbegan to occur. GaAlAs technology provided superior performance over previously availableLEDs. The brightness was over 10 times greater than standardLEDsdue to increased efficiency and multi-layer, heterojunction type structures. The voltage required for operation was lower resulting in a total power savings. TheLEDscould also be easily pulsed or multiplexed. This allowed their use in variable message and outdoor signs.LEDswere also designed into such applications as bar code scanners, fiber optic data transmission systems, and medical equipment. Although this was a major breakthrough inLEDtechnology, there were still significant drawbacks to GaAlAs material. First, it was only available in a red 660nm wavelength. Second, the light output degradation of GaAlAs is greater than that of standard technology. It has long been a misconception withLEDsthat lig ht output will decrease by 50% after 100,000 hours of operation. In fact, some GaAlAsLEDsmay decrease by 50% after only 50,000 -70,000 hours of operation. This is especially true in high temperature and/or high humidity environments. Also during this time, yellow, green and orange saw only a minor improvement in brightness and efficiency which was primarily due to improvements in crystal growth and optics design. The basic structure of the material remained relatively unchanged. To overcome these difficult issues new technology was needed.LEDdesigners turned to laser diode technology for solutions. In parallel with the rapid developments inLEDtechnology, laser diode technology had also been making progress. In the late 1980s laser diodes with output in the visible spectrum began to be commercially produced for applications such as bar code readers, measurement and alignment systems and next generation storage systems.LEDdesigners looked to using similar techniques to produce high brightness and high reliabilityLEDs. This led to the development of InGaAlP (Indium Gallium Aluminum Phosphide) visibleLEDs. The use of InGaAlP as the luminescent material allowed flexibility in the design ofLEDoutput color simply by adjusting the size of the energy band gap. Thus, green, yellow, orange and redLEDsall could be produced using the same basic technology. Additionally, light output degradation of InGaAlP material is significantly improved even at elevated temperature an d humidity. Current Developments of LED Technology InGaAlPLEDstook a further leap in brightness with a new development by Toshiba, a leading manufacturer ofLEDs. Toshiba, using the MOCVD (Metal Oxide Chemical Vapor Deposition) growth process, was able to produce a device structure that reflected 90% or more of the generated light traveling from the active layer to the substrate back as useful light output (Figure 4). This allowed for an almost two-fold increase in theLEDluminance over conventional devices.LEDperformance was further improved by introducing a current blocking layer into theLEDstructure (Figure 5). This blocking layer essentially channels the current through the device to achieve better device efficiency. As a result of these developments, much of the growth forLEDsin the 1990s will be concentrated in three main areas: The first is in traffic control devices such as stop lights, pedestrian signals, barricade lights and road hazard signs. The second is in variable message signs such as the one located in Times Square New York which displays commodities, news and other information. The third concentration would be in automotive applications. The visibleLEDhas come a long way since its introduction almost 30 years ago and has yet to show any signs of slowing down. A BlueLED, which has only recently become available in production quantities, will result in an entire generation of new applications. BlueLEDsbecause of their high photon energies (>2.5eV) and relatively low eye sensitivity have always been difficult to manufacture. In addition the technology necessary to fabricate theseLEDsis very different and far less advanced than standardLEDmaterials. The blueLEDsavailable today consist of GaN (gallium nitride) and SiC (silicon carbide) construction with brightness levels in excess of 1000mcd @ 20mA for GaN devices. Since blue is one of the primary colors, (the other two being red and green), full color solid stateLEDsigns, TVs etc. will soon become commercially available. Full colorLEDsigns have already been manufactured on a small prototype basis, however, due to the high price of blueLEDs, it is still not practical on a large scale. Other applications for blueLEDsinclude medical diagnostic equipment and photolithography. LED Colors It is also possible to produce other colors using the same basic GaN technology and growth processes. For example, a high brightness green (approximately 500nm)LEDhas been developed that is currently being evaluated for use as a replacement to the green bulb in traffic lights. Other colors including purple and white are also possible. With the recent introduction of blueLEDs, it is now possible to produce white by selectively combining the proper combination of red, green and blue light. This process however, requires sophisticated software and hardware design to implement. In addition, the brightness level is low and the overall light output of each RGB die being used degrades at a different rate resulting in an eventual color unbalance. Another approach being taken to achieve white light output, is to use a phosphor layer (Yttrium Aluminum Garnet) on the surface of a blueLED. In summary,LEDshave gone from infancy to adolescence and are experiencing some of the most rapid market growth of their lifetime. By using InGaAlP material with MOCVD as the growth process, combined with efficient delivery of generated light and efficient use of injected current, some of the brightest, most efficient and most reliableLEDsare now available. This technology together with other novelLEDstructures will ensure wide application ofLEDs. New developments in the blue spectrum and on white light output will also guarantee the continued increase in applications of these economical light sources. Practical use The first commercial LEDs were commonly used as replacements forincandescentandneonindicator lamps, and inseven-segment displays,first in expensive equipment such as laboratory and electronics test equipment, then later in such appliances as TVs, radios, telephones, calculators, and even watches (see list ofsignal uses). These red LEDs were bright enough only for use as indicators, as the light output was not enough to illuminate an area. Readouts in calculators were so small that plastic lenses were built over each digit to make them legible. Later, other colors grew widely available and also appeared in appliances and equipment. As LED materials technology grew more advanced, light output rose, while maintaining efficiency and reliability at acceptable levels. The invention and development of the high power white light LED led to use for illumination, which is fast replacing incandescent and fluorescent lighting. (see list ofillumination applications). Most LEDs were made in the ve ry common 5mm T1Â ¾ and 3mm T1 packages, but with rising power output, it has grown increasingly necessary to shed excess heat to maintain reliability,so more complex packages have been adapted for efficient heat dissipation. Packages for state-of-the-arthigh power LEDsbear little resemblance to early LEDs. Continuing development The first high-brightness blue LED was demonstrated byShuji NakamuraofNichia Corporationand was based onInGaNborrowing on critical developments inGaNnucleation on sapphire substrates and the demonstration of p-type doping of GaN which were developed byIsamu Akasakiand H. Amano inNagoya. In 1995,Alberto Barbieriat theCardiff UniversityLaboratory (GB) investigated the efficiency and reliability of high-brightness LEDs and demonstrated a very impressive result by using a transparent contact made ofindium tin oxide(ITO) on (AlGaInP/GaAs) LED. The existence of blue LEDs and high efficiency LEDs quickly led to the development of the firstwhite LED, which employed aY3Al5O12:Ce, or YAG, phosphor coating to mix yellow (down-converted) light with blue to produce light that appears white. Nakamura was awarded the 2006Millennium Technology Prizefor his invention. The development of LED technology has caused their efficiency and light output torise exponentially, with a doubling occurring about every 36 months since the 1960s, in a way similar toMoores law. The advances are generally attributed to the parallel development of other semiconductor technologies and advances in optics and material science. This trend is normally calledHaitzs Lawafter Dr. Roland Haitz. In February 2008, 300lumensof visible light per wattluminous efficacy(not per electrical watt) and warm-light emission was achieved by usingnanocrystals. In 2009, a process for growing gallium nitride (GaN) LEDs on silicon has been reported.Epitaxycosts could be reduced by up to 90% using six-inch silicon wafers instead of two-inch sapphire wafers. Illustration of Haitzs Law. Light output per LED as a function of production year, note the logarithmic scale on the vertical axis Technology Physics The LED consists of a chip of semiconducting materialdopedwith impurities to create ap-n junction. As in other diodes, current flows easily from the p-side, oranode, to the n-side, orcathode, but not in the reverse direction. Charge-carriers—electronsandholes—flow into the junction fromelectrodeswith different voltages. When an electron meets a hole, it falls into a lowerenergy level, and releasesenergyin the form of a photon. Thewavelengthof the light emitted, and thus its color depends on theband gapenergy of the materials forming thep-n junction. Insiliconor germaniumdiodes, the electrons and holes recombine by anon-radiative transitionwhich produces no optical emission, because these are indirect band gapmaterials. The materials used for the LED have adirect band gapwith energies corresponding to near-infrared, visible or near-ultraviolet light. LED development began with infrared and red devices made withgallium arsenide. Advances inmaterials sciencehave enabled making devices with ever-shorter wavelengths, emitting light in a variety of colors. LEDs are usually built on an n-type substrate, with an electrode attached to the p-type layer deposited on its surface. P-type substrates, while less common, occur as well. Many commercial LEDs, especially GaN/InGaN, also usesapphiresubstrate. Most materials used for LED production have very highrefractive indices. This means that much light will be reflected back into the material at the material/air surface interface. Thus,light extraction in LEDsis an important aspect of LED production, subject to much research and development. The inner workings of an LED I-V diagram for adiode. An LED will begin to emit light when the on-voltageis exceeded. Typical on voltages are 2-3volts. Refractive Index Idealized example of light emission cones in a semiconductor, for a single point-source emission zone. The left illustration is for a fully translucent wafer, while the right illustration shows the half-cones formed when the bottom layer is fully opaque. The light is actually emitted equally in all directions from the point-source, so the areas between the cones shows the large amount of trapped light energy that is wasted as heat. The light emission cones of a real LED wafer are far more complex than a single point-source light emission. Typically the light emission zone is a 2D plane between the wafers. Across this 2D plane, there is effectively a separate set of emission cones for every atom. Drawing the billions of overlapping cones is impossible, so this is a simplified diagram showing the extents of all the emission cones combined. The larger side cones are clipped to show the interior features and reduce image complexity; they would extend to the opposite edges of the 2D emission plane. Bare uncoated semiconductors such assiliconexhibit a very highrefractive indexrelative to open air, which prevents passage of photons at sharp angles relative to the air-contacting surface of the semiconductor. This property affects both the light-emission efficiency of LEDs as well as the light-absorption efficiency ofphotovoltaic cells. The refractive index of silicon is 4.24, while air is 1.00002926. Generally a flat-surfaced uncoated LED semiconductor chip will only emit light perpendicular to the semiconductors surface, and a few degrees to the side, in a cone shape referred to as thelight cone,cone of light,or theescape cone.The maximumangle of incidenceis referred to as thecritical angle. When this angle is exceeded photons no longer penetrate the semiconductor, but are instead reflected both internally inside the semiconductor crystal, and externally off the surface of the crystal as if it were amirror. Internal reflectionscan escape through other crystalline faces, if the incidence angle is low enough and the crystal is sufficiently transparent to not re-absorb the photon emission. But for a simple square LED with 90-degree angled surfaces on all sides, the faces all act as equal angle mirrors. In this case the light cannot escape and is lost as waste heat in the crystal. A convoluted chip surface with angledfacetssimilar to a jewel orfresnel lenscan increase light output by allowing light to be emitted perpendicular to the chip surface while far to the sides of the photon emission point. The ideal shape of a semiconductor with maximum light output would be amicrospherewith the photon emission occurring at the exact center, with electrodes penetrating to the center to contact at the emission point. All light rays emanating from the center would be perpendicular to the entire surface of the sphere, resulting in no internal reflections. A hemispherical semiconductor would also work, with the flat back-surface serving as a mirror to back-scattered photons. Transition coatings Many LED semiconductor chips arepottedin clear or colored molded plastic shells. The plastic shell has three purposes: 1. Mounting the semiconductor chip in devices is easier to accomplish. 2. The tiny fragile electrical wiring is physically supported and protected from damage 3. The plastic acts as a refractive intermediary between the relatively high-index semiconductor and low-index open air. The third feature helps to boost the light emission from the semiconductor by acting as a diffusing lens, allowing light to be emitted at a much higher angle of incidence from the light cone, than the bare chip is able to emit alone. Efficiency and operational parameters Typical indicator LEDs are designed to operate with no more than 30-60mWof electrical power. Around 1999,Philips Lumiledsintroduced power LEDs capable of continuous use at oneW. These LEDs used much larger semiconductor die sizes to handle the large power inputs. Also, the semiconductor dies were mounted onto metal slugs to allow for heat removal from the LED die. One of the key advantages of LED-based lighting is its high efficacy,[dubious-discuss]as measured by its light output per unit power input. White LEDs quickly matched and overtook the efficacy of standard incandescent lighting systems. In 2002, Lumileds made five-watt LEDs available with aluminous efficacyof 18-22 lumens per watt (lm/W). For comparison, a conventional 60-100 Wincandescent light bulbemits around 15 lm/W, and standardfluorescent lightsemit up to 100 lm/W. A recurring problem is that efficacy falls sharply with rising current. This effect is known asdroopand effectively limits the light output of a given LED, raising heating more than light output for higher current. In September 2003, a new type of blue LED was demonstrated by the companyCree Inc.to provide 24mW at 20milliamperes(mA). This produced a commercially packaged white light giving 65 lm/W at 20 mA, becoming the brightest white LED commercially available at the time, and more than four times as efficient as standard incandescents. In 2006, they demonstrated a prototype with a record white LED luminous efficacy of 131 lm/W at 20 mA. Also,Seoul Semiconductorplans for 135 lm/W by 2007 and 145 lm/W by 2008,which would be nearing an order of magnitude improvement over standard incandescents and better than even standard fluorescents.Nichia Corporationhas developed a white LED with luminous efficacy of 150 lm/W at a forward current of 20 mA. Practical general lighting needs high-power LEDs, of one watt or more. Typical operating currents for such devices begin at 350 mA. Note that these efficiencies are for the LED chip only, held at low temperature in a lab. Lighting works at higher temperature and with drive circuit losses, so efficiencies are much lower.United States Department of Energy(DOE) testing of commercial LED lamps designed to replace incandescent lamps orCFLsshowed that average efficacy was still about 46 lm/W in 2009 (tested performance ranged from 17lm/W to 79lm/W). Cree issued a press release on February 3, 2010 about a laboratory prototype LED achieving 208 lumens per watt at room temperature. The correlatedcolor temperaturewas reported to be 4579K. Lifetime and failure Main article:List of LED failure modes Solid state devices such as LEDs are subject to very limitedwear and tearif operated at low currents and at low temperatures. Many of the LEDs made in the 1970s and 1980s are still in service today. Typical lifetimes quoted are 25,000 to 100,000 hours but heat and current settings can extend or shorten this time significantly. The most common symptom of LED (anddiode laser) failure is the gradual lowering of light output and loss of efficiency. Sudden failures, although rare, can occur as well. Early red LEDs were notable for their short lifetime. With the development of high-power LEDs the devices are subjected to higherjunction temperaturesand higher current densities than traditional devices. This causes stress on the material and may cause early light-output degradation. To quantitatively classify lifetime in a standardized manner it has been suggested to use the terms L75 and L50 which is the time it will take a given LED to reach 75% and 50% light output respectively. Like other lighting devices, LED performance is temperature dependent. Most manufacturers published ratings of LEDs are for an operating temperature of 25Â °C. LEDs used outdoors, such as traffic signals or in-pavement signal lights, and that are utilized in climates where the temperature within the luminaire gets very hot, could result in low signal intensities or even failure. LED light output actually rises at colder temperatures (leveling off depending on type at around −30C). Consequently, LED technology may be a good replacement in uses such as supermarket freezer lightingand will last longer than other technologies. Because LEDs emit less heat than incandescent bulbs, they are an energy-efficient technology for uses such as freezers. However, because they emit little heat, ice and snow may build up on the LED luminaire in colder climates.This lack of waste heat generation has been observed to cause sometimes significant problems with street traffic signals and airport runway lighting in snow-prone areas, although some research has been done to try to develop heat sink technologies to transfer heat to other areas of the luminaire. Ultraviolet and blue LEDs BlueLEDs. Blue LEDs are based on the wideband gapsemiconductors GaN (gallium nitride) andInGaN(indium gallium nitride). They can be added to existing red and green LEDs to produce the impression of white light, though white LEDs today rarely use this principle. The first blue LEDs were made in 1971 by Jacques Pankove (inventor of the gallium nitride LED) atRCA Laboratories.These devices had too little light output to be of much practical use. In August of 1989, Cree Inc. introduced the first commercially available blue LED.In the late 1980s, key breakthroughs in GaNepitaxialgrowth andp-typedoping ushered in the modern era of GaN-based optoelectronic devices. Building upon this foundation, in 1993 high brightness blue LEDs were demonstrated. By the late 1990s, blue LEDs had become widely available. They have an active region consisting of one or more InGaNquantum wellssandwiched between thicker layers of GaN, called cladding layers. By varying the relative InN-GaN fraction in the InGaN quantum wells, the light emission can be varied from violet to amber. AlGaNaluminium gallium nitrideof varying AlN fraction can be used to manufacture the cladding and quantum well layers for ultraviolet LEDs, but these devices have not yet reached the level of efficiency and technological maturity of the InGaN-GaN blue/green devices. If the active quantum well layers are GaN, instead of alloyed InGaN or AlGaN, the device will emit near-ultraviolet light with wavelengths around 350-370nm. Green LEDs manufactured from the InGaN-GaN system are far more efficient and brighter than green LEDs produced with non-nitride material systems. With nitrides containing aluminium, most oftenAlGaNandAlGaInN, even shorter wavelengths are achievable. Ultraviolet LEDs in a range of wavelengths are becoming available on the market. Near-UV emitters at wavelengths around 375-395nm are already cheap and often encountered, for example, asblack lightlamp replacements for inspection of anti-counterfeitingUV watermarks in some documents and paper currencies. Shorter wavelength diodes, while substantially more expensive, are commercially available for wavelengths down to 247nm.As the photosensitivity of microorganisms approximately matches the absorption spectrum ofDNA, with a peak at about 260nm, UV LED emitting at 250-270nm are to be expected in prospective disinfection and sterilization devices. Recent research has shown that commercially available UVA LEDs (365nm) are already effective disinfection and sterilization devices. Deep-UV wavelengths were obtained in laboratories usingaluminium nitride(210nm),boron nitride(215nm)anddiamond(235nm). White light There are two primary ways of producing high intensity white-light using LEDs. One is to use individual LEDs that emit threeprimary colors—red, green, and blue—and then mix all the colors to form white light. The other is to use a phosphor material to convert monochromatic light from a blue or UV LED to broad-spectrum white light, much in the same way a fluorescent light bulb works. Due tometamerism, it is possible to have quite different spectra that appear white. RGB systems Combined spectral curves for blue, yellow-green, and high brightness red solid-state semiconductor LEDs.FWHMspectral bandwidth is approximately 24-27 nm for all three colors. White lightcan be formed by mixing differently colored lights, the most common method is to usered, green and blue(RGB). Hence the

The Scarlet Letter - Roger Chi :: essays research papers

Imagine a man having insecurities of his own, with a somewhat deformed and unpretentious appearance, finding that his spouse had betrayed him. For Roger Chillingworth, it was a completely heart-breaking devastation. In The Scarlet Letter, Chillingworth is the husband of Hester Prynne. When they married, he knew that she didn't love him, but still proceeded to commit the rest of his life to her. Consequently, a story of forbidden passion, hatred, and jealousy unfolds. Starting off as a scholar, Roger Chillingworth finds himself in a doctor's position later in the book. His back is deformed, and one shoulder is higher than the other, giving him a hunchbacked appearance. Chillingworth is not physically attractive and very slender. His eyes have a 'strong, penetrating power,'; (Chpt. 10, p. 157) and he is a loner. 'Old Roger Chillingworth, throughout life, had been calm in temperament, kindly, though not of warm affections, but ever, and in all his relations with the world, a pure and upright man.'; (p. 157, Chpt. 10) He enjoys studying and the pursuit of knowledge. When Chillingworth finds out that Hester cheated on him, he cannot be blamed for being dismayed and livid. He feels betrayed, and calls Hester's sin unpardonable. His rage quickly becomes resentment, and he develops a strong desire to find out with whom Hester had an affair with. Chillingworth seeks nothing but revenge. When Arthur Dimmesdale defends Hester and her actions, Chillingworth begins his suspicion. Chillingworth quickly becomes determined to withdraw the truth from Dimmesdale, who in fact was the man for whom Hester had betrayed him. The spite Chillingworth feels towards Dimmesdale grows stronger as his suspicion about Hester and Dimmesdale seems more and more likely. Chillingworth plans his vengeance during all of his waking hours. He becomes close to Dimmesdale, hoping maybe he would get a confession, but it didn't happen. The two soon lived together, while Chillingworth still prodded. From then on, Dimmesdale's life became miserable. 'Roger Chillingworth's aspect had undergone a remarkable change while he had dwelt in town, and especially since his abode with Mr. Dimmesdale. At first his expression had been calm, meditative, and scholar-like. "Now, there was something ugly and evil in his face, which they [people of the town] had not previously noticed, and which grew still the more obvious to sight the oftener they looked upon him.'; (Chpt. 9, p. 155) While pretending to be Dimmesdale's trusted confidant and physician, Chillingworth is actually slaying him by means of medicine and mental torture.

The Search for Happiness in George Eliots Silas Marner :: George Eliot Silas Marner Essays

  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   In the novel Silas Marner, by George Eliot, the characters are in a search for happiness.   One character named Godfrey Cass is disappointed   in his search when relying on wealth and luck, instead of love, does not lead him to happiness.   Another character, Silas Marner, looks first to a pile of gold that only consumes his life until he starts loving and caring for a child, who finally brings him happiness.   The lives of these characters show that wealth or material objects do not bring as much happiness as love.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Godfrey Cass believes that he can use his wealth to buy happiness in place of love that he has neglected to give.   In the novel, he has a daughter named Eppie whom he disowns for eighteen years.   After eighteen years, Godfrey wants her back to fill a hole in his life and make him happy.   He believes that his wealth can replace his missing love.   He admits this when speaking to Eppie, â€Å"though I haven’t been what a father should ha’ been to you all these years, I wish to do the utmost in my power for you for the rest of my life and provide for you as my only child† (714).   However,   Eppie â€Å"can’t feel as [she’s] got any father but one,† (715) meaning Silas Marner, who cared for and loved her for sixteen years.   The lack of love that Godfrey has given Eppie can not be replaced with wealth, and Godfrey’s life must remain incomplete.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Silas Marner was once incomplete and unhappy also when he was â€Å"cut off from faith and love,† (602) and lived only to collect a hoard of gold.   He shut out the rest of the world and any love he had for anything with it.   â€Å"His life had reduced itself to the functions of weaving and hoarding† (602).   In this life with only gold, and without love, Silas was an unhappy and lonely man.   Later in his life when he is happy, he recalls counting his gold every night and â€Å"how his soul was utterly desolate†(710).   He remains in this bleak position for fifteen years until his gold is lost and replaced with something to love.     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   When Silas loses his gold, he begins to experience happiness again after opening up to a child.   The child, Eppie, replaces Silas’s gold, but unlike the gold, she requires the love and care of a person.

Physical and Chemical Change Lab Essay

Test the effect of a magnet on each substance by passing the magnet under the paper. Test the solubility of each substance by mixing small amounts in a separate test tube with 3mL of distilled water in it, then â€Å"flick† each tube to mix the contents. Return strip of magnesium in test tube to its paper. Follow teacher’s instructions for paper disposal of other materials. -Part B: Record all observations of Part B in Data Table 2 6. Mix iron filings and sulfur on clean paper. Examine mixture with magnifying class. Test effect of magnet. Give this mixture to teacher for further use in Part C. 7. Mix sodium chloride and sand on clean paper. Examine mixture with magnifying glass and test effect of magnet. 8. Transfer salt-sand mixture into 100mL beaker, then add 30mL of water and stir. Record observations, and then prepare for filtration setup. Filter the mixture and record observations. Pour 10mL of filtrate into evaporating dish, then prepare burner to heat evaporating dish. Heat dish till filtrate is completely evaporated. Examine both dry residue in dish and wet residue on filter paper. Caution: Do not look directly at burning magnesium. Using tongs pick up the magnesium and hold it over the burner till it ignites. After ignition quickly put burning magnesium over watch glass to catch falling combustion product. Compare original and burnt magnesium products appearance. 10. Put the normal magnesium and combustion product into separate test tubes. Add 10 drops of 6M hydrochloric acid to each test tube. Feel the bottom of each test tube and record your answer. 11. Put half of the sucrose sample into a test tube. Caution: Be sure tube is cool before handling it. After test tube is cool, use a spatula to scrape residue and clean test tube. Examine residue and test its solubility in water. Transfer sodium hydrogen carbonate sample to test tube. Add 5 drops of 6M hydrochloric acid. Touch tube at bottom with hand and record observation. Follow teacher’s instruction for proper disposal of materials. -Part C: Record all observations for Part C in Data Table Samples of the iron-sulfur mixture from Part B will be put into a clean test tube. The mass of the test tube and its contents will be determined and recorded.

Traffic Troubles

TRAFFIC CONGESTION: Traffic congestion is a condition on road networks that occurs as use increases, and is characterized by slower speeds, longer trip times, and increased vehicular queueing. The most common example is the physical use of roads by vehicles. When traffic demand is great enough that the interaction between vehicles slows the speed of the traffic stream, this results in some congestion. As demand approaches the capacity of a road (or of the intersections along the road), extreme traffic congestion sets in. When vehicles are fully stopped for periods of time, this is colloquially known as a traffic jam or traffic snarl-up.Traffic congestion can lead to drivers becoming frustrated and engaging in road rage. CAUSES: Traffic congestion occurs when a volume of traffic or modal split generates demand for space greater than the available road capacity; this point is commonly termed saturation. There are a number of specific circumstances which cause or aggravate congestion; m ost of them reduce the capacity of a road at a given point or over a certain length, or increase the number of vehicles required for a given volume of people or goods. About half of U. S.  traffic congestion is recurring, and is attributed to sheer weight of traffic; most of the rest is attributed to traffic incidents, road work and weather events. [2]Traffic research still cannot fully predict under which conditions a â€Å"traffic jam† (as opposed to heavy, but smoothly flowing traffic) may suddenly occur. It has been found that individual incidents (such as accidents or even a single car braking heavily in a previously smooth flow) may cause ripple effects (acascading failure) which then spread out and create a sustained traffic jam when, otherwise, normal flow might have continued for some time longer.Mathematical theories: Some traffic engineers have attempted to apply the rules of fluid dynamics to traffic flow, likening it to the flow of a fluid in a pipe. Congestion simulations and real-time observations have shown that in heavy but free flowing traffic, jams can arise spontaneously, triggered by minor events (â€Å"butterfly effects†), such as an abrupt steering maneuver by a single motorist. Traffic scientists liken such a situation to the sudden freezing ofsupercooled fluid. [4] However, unlike a fluid, traffic flow is often affected by signals or other events at junctions that periodically affect the smooth flow of traffic.Alternative mathematical theories exist, such as Boris Kerner's three-phase traffic theory (see also spatiotemporal reconstruction of traffic congestion). Because of the poor correlation of theoretical models to actual observed traffic flows, transportation planners and highway engineers attempt to forecast traffic flow using empirical models. Their working traffic models typically use a combination of macro-, micro- and mesoscopic features, and may add matrix entropy effects, by â€Å"platooning† groups of vehicles and by randomising the flow patterns within individual segments of the network.These models are then typically calibrated by measuring actual traffic flows on the links in the network, and the baseline flows are adjusted accordingly. A team of MIT mathematicians has developed a model that describes the formation of â€Å"phantom jams,† in which small disturbances (a driver hitting the brake too hard, or getting too close to another car) in heavy traffic can become amplified into a full-blown, self-sustaining traffic jam.Key to the study is the realization that the mathematics of such jams, which the researchers call â€Å"jamitons,† are strikingly similar to the equations that describe detonation waves produced by explosions, says Aslan Kasimov, lecturer in MIT's Department of Mathematics. That discovery enabled the team to solve traffic-jam equations that were first theorized in the 1950s. [5] Traffic Troubles TRAFFIC CONGESTION:Traffic congestion is a condition on road networks that occurs as use increases, and is characterized by slower speeds, longer trip times, and increased vehicular queueing. The most common example is the physical use of roads by vehicles. When traffic demand is great enough that the interaction between vehicles slows the speed of the traffic stream, this results in some congestion. As demand approaches the capacity of a road (or of the intersections along the road), extreme traffic congestion sets in. When vehicles are fully stopped for periods of time, this is colloquially known as a traffic jam or traffic snarl-up. Traffic congestion can lead to drivers becoming frustrated and engaging in road rage.CAUSES:Traffic congestion occurs when a volume of traffic or modal split generates demand for space greater than the available road capacity; this point is commonly termed saturation. There are a number of specific circumstances which cause or aggravate congestion; mos t of them reduce the capacity of a road at a given point or over a certain length, or increase the number of vehicles required for a given volume of people or goods. About half of U.S. traffic congestion is recurring, and is attributed to sheer weight of traffic; most of the rest is attributed to traffic incidents, road work and weather events.[2]Traffic research still cannot fully predict under which conditions a â€Å"traffic jam† (as opposed to heavy, but smoothly flowing traffic) may suddenly occur. It has been found that individual incidents (such as accidents or even a single car braking heavily in a previously smooth flow) may cause ripple effects (acascading failure) which then spread out and create a sustained traffic jam when, otherwise, normal flow might have continued for some time longer. Mathematical theories:Some traffic engineers have attempted to apply the rules of fluid dynamics to traffic flow, likening it to the flow of a fluid in a pipe. Congestion simula tions and real-time observations have shown that in heavy but free flowing traffic, jams can arise spontaneously, triggered by minor events (â€Å"butterfly effects†), such as an abrupt steering maneuver by a single motorist. Traffic scientists liken such a situation to the sudden freezing  ofsupercooled fluid.However, unlike a fluid, traffic flow is often affected by signals or other events at junctions that periodically affect the smooth flow of traffic. Alternative mathematical theories exist, such as Boris Kerner's three-phase traffic theory (see also spatiotemporal reconstruction of traffic congestion). Because of the poor correlation of theoretical models to actual observed traffic flows, transportation planners and highway engineers attempt to forecast traffic flow using empirical models. Their working traffic models typically use a combination of macro-, micro- and mesoscopic features, and may add matrix entropy effects, by â€Å"platooning† groups of vehicle s and by randomising the flow patterns within individual segments of the network.These models are then typically calibrated by measuring actual traffic flows on the links in the network, and the baseline flows are adjusted accordingly. A team of MIT mathematicians has developed a model that describes the formation of â€Å"phantom jams,† in which small disturbances (a driver hitting the brake too hard, or getting too close to another car) in heavy traffic can become amplified into a full-blown, self-sustaining traffic jam. Key to the study is the realization that the mathematics of such jams, which the researchers call â€Å"jamitons,† are strikingly similar to the equations that describe detonation waves produced by explosions, says Aslan Kasimov, lecturer in MIT's Department of Mathematics. That discovery enabled the team to solve traffic-jam equations that were first theorized in the 1950s.