Tips on How to Read Chinese

Tips on How to Read Chinese To the undeveloped eye, Chinese characters can appear to be a confounding chaos of lines. Be that as it may, characters have their very own rationale, uncovering pieces of information about definition and elocution. When you become familiar with the components of characters, the rationale behind them starts to develop. Why Are Radicals Important? The structure squares of Chinese characters are radicals. Practically all Chinese characters are made out of in any event one radical. Customarily, Chinese word references were grouped by radicals, and numerous advanced word references despite everything go through this technique for looking characters. Other order techniques utilized in word references incorporate phonetics and the quantity of strokes utilized for drawing characters. Other than their convenience for classifying characters, radicals likewise give signs to importance and articulation. This is especially valuable when characters additionally have a related subject. For instance, most characters having to do with water or dampness all offer the radical æ °' (shuç ). The radical æ °' all alone is additionally a Chinese character, which means water. A few radicals have more than one structure. The radical æ °' (shuç ), for instance, can likewise be composed as æ ° µ when it is utilized as a component of another character. This radical is called ä ¸â€°Ã§â€š ¹Ã¦ °' (sä n diçžn shuç ), which implies three drops of water as, surely, the extreme looks like three droplets. These substitute structures are seldom utilized autonomously since they don't remain as Chinese characters on their own. Therefore, radicals can be a valuable instrument for recalling the importance of Chinese characters. Here are a couple of instances of characters dependent on the radical æ °' (shuç ): æ ° ¾ †fn †flood; flood æ ±  †zhä « †juice; liquid æ ±  †wn †sob; shed tears æ ±â€"†hn †sweat æ ±Ã¿ †jiä ng †waterway Characters can be made out of more than one radical. At the point when numerous radicals are utilized, one radical is ordinarily used to allude to the meaning of the word while the other radical indications at the elocution. For instance: æ ±â€"†hn †sweat The radical æ °' (shuç ) infers thatâ æ ±â€"has something to do with water, which bodes well since sweat is wet. The sound of the character is given by the other component. Ã¥ ¹ ² (gn) all alone is the Chinese character for dry. However, gn and hn sound fundamentally the same as. Kinds of Characters There are six unique sorts of Chinese characters: pictographs, ideographs, composites, phonetic credits, radical phonetic mixes, and borrowings. Pictographs The most punctual types of Chinese composing begin from pictographs. Pictographs are straightforward graphs intended to speak to objects. Instances of pictographs include: æâ€" ¥ †rã ¬ †sun Ã¥ ± ± †shä n †mountain é› ¨ †yç †downpour ä º º †rã ©n †individual These models are present day types of pictographs, which are very adapted. Be that as it may, the early structures unmistakably show the articles they represent.â Ideographs Ideographs are characters which speak to a thought or idea. Instances of ideographs incorporate ä ¸â‚¬ (yä «), ä ºÅ" (à ¨r), ä ¸â€° (sä n), which implies one, two, three. Different ideographs incorporate ä ¸Å¡ ( shng) which meansâ up and ä ¸â€¹ (xi) which meansâ down. Composites Composites are shaped by joining at least two pictographs or ideographs. Their implications are regularly suggested by the relationship of these components. A few instances of composites include: Ã¥ ¥ ½ †hçžo †great. This character joins lady (Ã¥ ¥ ³) with youngster (Ã¥ ­ ). æ £ ® †sän †backwoods. This character joins three trees (æÅ" ¨) to make a backwoods. Phonetic Loans As Chinese characters developed after some time, a portion of the first characters were utilized (or lent) to speak to words that had a similar sound yet various implications. As these characters took on another importance, new characters speaking to the first significance were formulated. Here is a model: Ã¥Å"â€" - bä›iâ This character initially implied â€Å"the back (of the body)† and was articulated bã ¨i. After some time, this Chinese character has come to mean north. Today, the Chinese word for back (of the body) is currently spoken to by the character èÆ'Å" (bã ¨i) . Radical Phonetic Compounds These are characters which join phonetic parts with semantic segments. These speak to roughly 80 percent of present day Chinese characters. You have just considered guides to be radical phonetic mixes as examined earlier.â Borrowings The last classification †borrowings †is for characters that speak to more than single word. These words have a similar elocution as the acquired character, yet don't have their very own character. A case of acquiring is è  ¬ (wn) which initially implied â€Å"scorpion†, yet came to mean â€Å"ten thousand†, and is likewise a family name.

Is the Cost of College Too High?

Is the Cost of College Too High?In most cases the answer to that question is 'no' but you still may be asking yourself the question: 'Is the cost of college too high?' If you think your current financial situation is enough of a deterrent to apply to college then think again.To answer that question it would help to look at some of the recent reports on this topic in the newspaper. The cost of living is one area that has been subject to tremendous discussion in the news and other forms of media. College costs are one of the areas that have been addressed by these reports.There is a growing trend to write essays or any type of written response to the question 'Is the cost of college too high?' This is a great way to express your thoughts about the issue without having to spend money to do so.However, if you decide to take this route there are a few things you need to know when it comes to writing a paper. I have put together some suggestions below to help you understand what to expect. There are many different types of essays that can be written for this purpose. There are college essay examples and college essay samples that can give you a good idea of what you can expect to write about. If you do not want to go through all of the effort to write your own essay you can also use a resource that will have samples of the types of essays they have already done for you.When writing a paper that involves the topic of how the cost of college is too high, there are a few guidelines you will want to keep in mind. The first is to write your essay at a professional level. Remember that this is not a public record, even though it may seem like one, and you should try to write your essay at a level that is above your grade level.The second tip that you will want to keep in mind is to write your essay in essay format with multiple choice questions that have been pre-scored. These are critical because they will give you a clear idea of where you stand in terms of your ability t o answer these types of questions.Finally, when writing an essay that deals with the topic of the cost of college being too high you should also keep in mind that your essay will need to be organized in some way. If you do not write from the heart, you will fail in your goal to write a well thought out essay.

Siddhartha Essay: Hindu and Buddhist Thought -- Hesse Siddhartha Essay

Hindu and Buddhist Thought in Siddhartha   â â â Siddhartha, set in India, is captioned an Indic Poetic Work, and it plainly owes a lot to Indian religions. In any case, the topic of the specific idea of Hesse's obligation to different parts of Indian religion and reasoning in Siddhartha is very confused and merits point by point conversation. This exposition will examine the components of Hindu and Buddhist idea present in Siddhartha and make qualifications between them.  Siddhartha is one of the names of the recorded Gotama (Nossâ 213), the life of Hesse's character, Siddhartha takes after that of his chronicled partner somewhat. Siddhartha is in no way, shape or form an anecdotal existence of Buddha, yet it contains various references to Buddha and his lessons.  The essential educating of Buddha is planned in the Four Noble Truths and the Eightfold Path (Gupta 17). Continuing from the reason that enduring exists and that a discharge from it must be discovered, Buddha built his framework. The First Noble Truth is the reality of misery. The Second Truth is that experiencing emerges human want for something, and that this longing can never be fulfilled. The Third Truth is that there is an approach to accomplish a discharge from anguish. What's more, the Fourth Truth recommends the way of defeating enduring and accomplishing genuine information.  The initial two stages in the Eightfold Path, which prompts the discontinuance of affliction, are correct understanding and right goals; an individual should initially find and experience the accuracy of the Four Noble Truths (it isn't adequate to affirm a shallow conviction), and afterward resolve to follow the right way. The following three stages moreover structure a sort of unit: right discourse, right conduct, an... ...College Press, Princeton: 1991. Gupta, Hari,â Buddhism in India. Princeton University Press, Princeton: 1964. Heinrich Dumoulin, Zen Buddhism: A History. Volume 1: India and China. Macmillan, New York: 1988. Hesse, Herman. Siddhartha. Dover Publications, 1998. Lord, Sallie B., Buddha Nature. State University of New York Press, Albany: 1991. Klostermaier, Klaus K. A Survey of Hinduism. Albany, New York: SUNY Albany Press, 1994. Matta, Eva. Dynamic Hinduism Ed. David Westerlund. New York: St. Martin's Press, 1996. 237-258. Noss, David S., and John B. Noss. The World's Religions. New York: Macmilllan College Publishing Company 1994. Shaw, Leroy, Time and the Structure of Hermann Hesse's Siddhartha, Symposium 9 (1957): 204-224. Timpe, Eugene F. Hesse's Siddhartha and the Bhagavad Gita. Relative Literature, V.22 No.4 , 1970. Siddhartha Essay: Hindu and Buddhist Thought - Hesse Siddhartha Essay Hindu and Buddhist Thought in Siddhartha   â â â Siddhartha, set in India, is captioned an Indic Poetic Work, and it plainly owes a lot to Indian religions. Be that as it may, the topic of the specific idea of Hesse's obligation to different parts of Indian religion and reasoning in Siddhartha is very convoluted and merits point by point conversation. This exposition will talk about the components of Hindu and Buddhist idea present in Siddhartha and make differentiations between them.  Siddhartha is one of the names of the chronicled Gotama (Nossâ 213), the life of Hesse's character, Siddhartha takes after that of his authentic partner somewhat. Siddhartha is in no way, shape or form an anecdotal existence of Buddha, yet it contains various references to Buddha and his lessons.  The essential instructing of Buddha is defined in the Four Noble Truths and the Eightfold Path (Gupta 17). Continuing from the reason that enduring exists and that a discharge from it must be discovered, Buddha developed his framework. The First Noble Truth is the reality of affliction. The Second Truth is that experiencing emerges human want for something, and that this longing can never be fulfilled. The Third Truth is that there is an approach to accomplish a discharge from affliction. What's more, the Fourth Truth recommends the way of beating enduring and achieving genuine information.  The initial two stages in the Eightfold Path, which prompts the discontinuance of affliction, are correct understanding and right goals; an individual should initially find and experience the accuracy of the Four Noble Truths (it isn't adequate to affirm a shallow conviction), and afterward resolve to follow the right way. The following three stages similarly structure a sort of unit: right discourse, right conduct, an... ...College Press, Princeton: 1991. Gupta, Hari,â Buddhism in India. Princeton University Press, Princeton: 1964. Heinrich Dumoulin, Zen Buddhism: A History. Volume 1: India and China. Macmillan, New York: 1988. Hesse, Herman. Siddhartha. Dover Publications, 1998. Ruler, Sallie B., Buddha Nature. State University of New York Press, Albany: 1991. Klostermaier, Klaus K. A Survey of Hinduism. Albany, New York: SUNY Albany Press, 1994. Matta, Eva. Dynamic Hinduism Ed. David Westerlund. New York: St. Martin's Press, 1996. 237-258. Noss, David S., and John B. Noss. The World's Religions. New York: Macmilllan College Publishing Company 1994. Shaw, Leroy, Time and the Structure of Hermann Hesse's Siddhartha, Symposium 9 (1957): 204-224. Timpe, Eugene F. Hesse's Siddhartha and the Bhagavad Gita. Relative Literature, V.22 No.4 , 1970.

Essay Examples What are the Different Types of Essays

As a writer, you’re probably going to be tasked with writing more than one essay. In fact, if you haven’t written an essay lately, read on. Essays are a great addition to every writer’s portfolio. Over the next few weeks, we’ll be taking a peek at different types of essays; we’ll leave it up to you which essay examples you choose for your portfolio. But first, let’s explore the different types of essays. The Narrative Essay Have you ever read a Chicken Soup for the Soul book? Okay they’re a little cheesy. But most of the essay examples within those books are great examples of the narrative essay. A narrative essay is one which tells a story, and there’s usually a lesson to be learned at the end. If you’re charged with writing a narrative essay, there are certain attributes that your delivery has to have. Most importantly, you’ll need to ask from what point of view the essay should be written. Most narrative essays are written in the first person. â€Å"When I was growing up, I loved to eat, eat, eat apples and bananas.† This would be a great introduction to a narrative essay. It’s personal, and written in the first person. It leads the reader to believe that there’s a point to stating the dietary persuasion of the speaker. A narrative essay such as this one may end with a moral. â€Å"Those fruit flies impacted me in a deeply curious way. It’s for that reason I’ve switched to eating grapes and kiwi.† It’s probably rare that a client will hire you to write a narrative essay, unless he’s looking for you to write his memoir. With that said, however, you may choose to include a narrative essay of your own on your portfolio, or submit one to a publication. There are many book publishers and magazines which will pay you nicely for your own original narrative essay. The Persuasive Essay The persuasive essay is exactly as the name implies. The writer of a persuasive essay has come to a realization, and wants to make you believe that his idea is the truth. Persuasive essays are used frequently in academics. For example, a student may be given an assignment to write how Piggy was the bad guy in Lord of the Flies. Within that essay, that student aims to convince you that Piggy did indeed deserve to meet his demise. You probably won’t find a lot of persuasive essays in coffee table books. But you can find them outside of academia. A good example of a persuasive essay is the sermon a preacher delivers. TED Talks are usually persuasive essays in spoken form, also. â€Å"Young people have a tendency to eat, eat, eat apples and bananas,† a persuasive essay might begin. The introduction is followed by two or three points which serve to prove the point of the author. Is it a good idea to eat so many apples and bananas? A bad one? Maybe the author dislikes fruit in general. The points within the article lead up to a conclusion: â€Å"Kids today have a plethora of options available to them. Limiting a child’s diet to apples and bananas will most certainly contribute to the fall of human civilization.† By the end of the persuasive essay, it’s clear what the author intends to impart to his audience. Apples and bananas aren’t the way to go, and the persuasive essay can convince the reader of just that. Argumentative Essay The argumentative essay is one in which all Facebook trolls will delight. Take a commonly held belief – any – and find the opposing viewpoint. Express that viewpoint in a nicely worded piece of literature and BAM! You’ve got an argumentative essay. If you include to choose  argumentative essay examples in your portfolio, be careful. Writing about religion or politics can send clients quickly running in the opposite direction. But there are plenty of fair game topics out there for you to explore. â€Å"Why is Android superior to the iPhone?† â€Å"Are Gluten-free Diets a Fad?† â€Å"When I was a kid, I loved to eat, eat, eat apples and bananas. As it would turn out, I was a step ahead of the gluten-free gang.† While the introductory paragraph may contain a personal anecdote, the remainder of the argumentative essay should be factual, and probably written in the second or third person. â€Å"While only 3.5 million people have celiac disease, an exponentially higher number of people are on a gluten free diet.† Taking a popular stance and dissecting it is par for the course in an argumentative essay. If you’re challenged to write one of these, we’d just advise you to be careful. Don’t alienate your clients. Comparative Essays â€Å"I like to eat apples and bananas, but which is better?† A comparative essay is one which takes two commonly held viewpoints and exposes similarities and contrasts between them. While it’s not always the case, comparative essays are usually written objectively. These essay examples aim to show the difference between, say, apples and bananas. What’s good about apples, and what’s great about bananas? â€Å"Apples are crunchy, and bananas squish in your mouth. However, both are delicious.† Comparative essays are very frequently assigned to students. There’s a very broad range of use for them in academics, whether Religious Studies majors are comparing theologies or Language Arts students are comparing protagonists in literary works. You may also come across comparative essays in your work as a freelancer. Sometimes even simple product reviews can be examples of short comparative essays. We have comparative essays on the Freelance With Us website, too. Take a look at our article on Word vs. Google Docs, or our piece on Scrivener vs Storyist. So while these certainly aren’t all the different types of essays, the four essay examples we’ve outlined are the most popularly encountered in both school and freelancing. Over time, we’ll take a more in depth look at each of these, and show you how to perfect the art of essay writing.

An Analysis Of The Oedipus And Plato - 1636 Words

KAUFMANN’S OEDIPUS AND PLATO’S SOCRATES In Chapter Four of his book, Tragedy and Philosophy, Walter Kaufmann claims that Sophocles’ play Oedipus Rex is one of the greatest tragedies ever written in part because it presents so vividly five characteristics of human life which make our existence so tragic. The purpose of this paper will be, first, to present Kaufmann’s view and, second, to apply these same characteristics to Plato’s dialogues in general and to the characters in Plato’s dialogues, particularly Socrates. Unfortunately, Kaufmann would disagree with me. He argues throughout his book that Plato is anti-tragic. This paper will not address Kaufmann’s argument, although much that is said here is an attempt to refute his reading of Plato. The most striking claim Kaufmann makes about Sophocles’ play is, â€Å"Sophocles constructs his whole plot around Oedipus’ relentless quest for truth, although the old story wa s not a story about honesty at all†¦The central spring of the action of Sophocles’ tragedy is not, as it well might have been, fate, but rather Oedipus’ imperious passion for the truth†¦All the conflicts in the tragedy are generated by the king’s quest for the truth (121-123). I would add that it is not a quest for truth in any sense, but a quest for self-knowledge, which drives Oedipus and which ends when he finally comes to know who he is. Oedipus is presented as a man who follows the Delphi oracle, â€Å"Know thyself† to its bitter end. This very quality inShow MoreRelatedJustification of Creon in Antigone by Sophocles Essay994 Words   |  4 Pages Antigone is a tragic play written by Sophocles in about 441b.c. The play is a continuation of the curse put upon the household of Oedipus Rex. 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Other important people include Demosthenes, Aristotle, Aspacia, Pericles, Plato, Pythagoras, Sappho, Sophocles, and Thucydides. These people have formed many of our current trends and philosophical ideas in a variety of different subjects. First of all Demosthenes was a great orator, even though he had a severe lisp and had difficulties

Alexis Ranieri. Hist 130204. May 5, 2017. Final Exam.

Alexis Ranieri HIST 1302:04 May 5, 2017 Final Exam Question II Andrew Jackson was the seventh President of the United States of America and served as President from 1829 until 1837. His Inauguration was March 4, 1829. Some of Jackson’s major goals as President were as follows: purge government corruption and privilege, Indian removal, affirm national sovereignty, pay off national debt, kill the B.U.S., and hard currency. These goals were known under the Jacksonian Program. To solve the â€Å"Indian problem†, they designated â€Å"Indian territory† across the Mississippi river. White Americans, more so the ones who lived on the western frontier, feared and resented the Native Americans they would encounter. They saw the Indians as unfamiliar people†¦show more content†¦Between the Northern and Southern sections of the United States there was a lot of differences and they developed along different lines. The South stayed predominantly agrarian in their economy while the North became more industrialized as time went on. Different social cultures and political beliefs began to develop. It eventually led to disagreements on issues like taxes, tariffs and internal improvements as well as states’ rights versus federal rights. Slavery was the burning issue that led to the disruption of the union. The South and its agriculture used slaves to tend to its large plantations and perform other duties. The states in the North had gradually abolished slavery one by one. The states’ rights refer to the struggle between the federal government and individual states over the political power. During the Civil War era, this struggle focused greatly on the institution of slavery and if the federal level of government had the right to regulate or abolish slavery in individual states. The debate was sided largely between northern and southern states, thus widening the growing divide in the nation. By the early 1830s, those who wished to see slavery abolished in the United States were becoming more vocal and influential. They claimed obedience to higher law over obedience to the Constitution’s guarantee that an outlaw from one state would be

What Ails Indian Sports free essay sample

Its decline is also partly due to the internal politics in Indian field hockey bodies. Its popularity has also declined massively in parallel to the decline of the Indian hockey team. In recent times, the standard of Indian hockey has gone form from bad to worse, with the Indian hockey team not qualifying for the 2008 Olympics and finishing last in the recent 2012 Olympics. Currently, the Indian team is 11th in the FIH rankings. [16] India has hosted 2 Hockey World Cups- one in 1982 at Mumbai and another in 2010 at Delhi, where they finished fifth and eighth respectively. It has also hosted the annual Hockey Champions Trophy in 1996 and 2005. Until 2008, the Indian Hockey Federation (IHF) was the apex body for hockey in the country. However, following revelations of corruption and other scandals in the IHF, the IHF was de recognised and a new apex body for Indian hockey, Hockey India (HI), was formed on 20 May 2009. We will write a custom essay sample on What Ails Indian Sports or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Hockey India, recognised by the FIH, has the sole mandate to govern and conduct all activities for both mens and womensfield hockey in India. Although the IHF was reinstated in 2010,[17] it is not recognised by the FIH. The IHF conducts a city-based tournament called World Series Hockey (WSH), its first season being in 2012. However, it is not approved by Hockey India or the FIH. Hockey India League (Hindi: ), abbreviated as HIL, is a professional league for field hockey competition in India. It is organised by Hockey India. The tournament contested among franchisee-based teams consisting of players from India and around the world. The entire event takes place on home and away basis culminating into multi header playoffs. The International Hockey Federation (FIH) has sanctioned the event and also provided a 30-day window at the beginning of next year so that all top players can participate.

Hertz Goes Wireless Essay Example

Hertz Goes Wireless Essay We have chosen minicase Hertz goes Wireless from chapter seven which describes how information systems provided to employees facilities by wireless technology Which improves their performance and productivity. INTRODUCTION In a competitive world, Hertz is a company that rents cars. It is the world? s largest enterprise and competes against thousands of companies in hundreds of countries. Hertz is operating approximately in 8,100 in 145 countries worldwide. Its goal is to pay attention on customer acquisition and loyalty. Hertz is the first company that has incorporated information technologies in 1970. Moreover, it is a pioneer in mobile commerce applications like, for example, quick rentals, instant returns, in-car cellular phones, NeverLost onboard, additional customer services, car locations and Wi-Fi connection. The year 2004 was the debut of Wi-Fi — wireless, high-speed Internet service. Available in more than 50 U. S. airport locations. Its vision is to be the first choice brand among customers for vehicle and equipment rental/ leasing as well as total mobility solutions. We evolve to present a concept of our minicase by answering questions below: QUESTIONS 1. Which of these applications are intrabusiness in nature? Wireless intrabusiness is a kind of application that is developed inside of the company. It has been around since early 1900s in the non-Internet environment. Such applications include wireless networking used to pick items out of storage in warehouses via PCs, based on delivery status updates that enter on PCs inside collection of data. By now a vast number of Intrabusiness applications had been implemented inside enterprises. Since the early 1900s, Wireless intrabusiness application in the non-Internet environment has been around. We will write a custom essay sample on Hertz Goes Wireless specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Hertz Goes Wireless specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Hertz Goes Wireless specifically for you FOR ONLY $16.38 $13.9/page Hire Writer For example: -wireless networking used to pick items out of storage in warehouses via PCs mounted on forklifts -delivery-status updates entered on PCs inside distribution trucks -collection of data such as competitor? s inventories in stores and customer orders using a handheld (but not networked) device, from which data were transferred to company headquarters each evening. The intrabusiness applications that Hertz uses are: Instant returns helps you to make your check-out in less than a minute via wireless system that is connected to a data-base. So, thanks to automatic technologies there is a reduction in time and costs. The reduction in costs is caused by modern systems which makes the work of the organization easier when it uses automatic calculations. Car locations is a system that has its basis on Global Positioning Systems (GPS) that determines the precise location of the vehicle and can direct its automatic steering. Because of the rows GPS is very exact, so the company knows where their clients are staying every time. Hertz benefits are: a total control of its cars, prevention of a possible crime committed by customers (for instance stealing a car or trying to use fake customer data). . Identify any finance- and marketing-oriented applications The finance-oriented applications are: -Quick rentals This is a finance application because you don? t have to do transactions that wouldn? t be necessary. It allows quick figuring and billing of customers on the moment of giving back the car that had been rented. For example, this system is part of a national wireless network that can check credit cards , examine your rental history, determine which airline to credit your loyalty mileage to, and more. This application does everything for you because you only have to arrive at the airport and go to the slot where the car is waiting for you. It has services like greets attendance, confirmation of reservations and Wi-Fi which transmits your data to the renting booth. With the reduction of work connected with filling papers, this can be seen as an advantage for the company. Moreover, this system operated over a WLAN which is a type of local area network that uses high-frequency radio waves rather than wires to communicate between computers or devices. A WLAN typically extends an existing wired LAN and is built by attaching a wireless access point (AP) to the edge of the wired network. -Instant returns Because this application uses a handheld device that automatically calculates the costs of the rental and prints out a receipt for the renter. The information system that the company uses is data-base via wireless. This is an example how the internet supports companies in financial areas. The marketing-oriented applications are: -NeverLost Onboard You can get information about the locations of the nearest hospitals, gas stations, restaurants, and tourist areas. This system was introduced for first time in 1995 in the USA and was exported to Europe ten years later. -Additional customer services The customer can receive city guides, all the locations guides, city maps and other tools. This can be an advantage for Hertz, because the company provides all additional features to the customers, which is the perfect way to attract and retain its recipient. -Wi-Fi connection Wi-Fi is a technology that allows computers to share a network wirelessly without the need to connect to a commercial network. It usually consists of a router, which transmits the signal, and one or more adapters, which receive the signal and are attached to computers. This is a marketing application that became available in all major airports, hospitals, restaurants, tourist areas served by Hertz in the USA. Moreover, you can be connected across the entire world. 3. What are the benefits to Hertz of knowing exactly where each of its cars are? As a renter, how do you feel about this capability? In our opinion there is a number of reasons that Hertz Company benefits of knowing exactly where each car is. Firstly it is very useful to have GPS system that the philosophy of Hertz is mainly working on. Thanks to this system, the company can find a car in case of an offense by a customer. So the client can? t take advantage and steal the rented car. It proves that by having the knowledge where each of its cars are, Hertz can detect the vehicle immediately. ?Secondly, it is important to know where each car is exactl y, because when something wrong happens to the driver or vehicle, any accident no matter how serious it is, the company can for example send an ambulance to the place of the incident immediately. Or it can provide another vehicle, what builds a feeling of loyalty among customers and helps to avoid stress or time wasted. ?Thirdly, thanks to this kind of knowledge the firm cares about its own business. That’s because in some contracts while renting a vehicle there are kilometers limit, and after transgression of it the company possesses information about the location of the client in that moment, in case of trying not to pay for over limit. Also in some countries there is a law that doesn’t allow leaving it while renting a car. ?Besides, this system can prevent crimes. We mean that in case when the customer brings illegal stuff in a car rented from Hertz, the company can hand in information to the police about the suspected car and customer. As a renter, for us there are two sides for this phenomenon. On the one hand we would feel safe, and not worried wherever we go, because the GPS system would not allow us to get lost, it’s always satellite- controlled steering. Moreover, thanks to the fact that Hertz is monitoring the vehicle it helps us to avoid stress in case of an accident. This technology would alert employees of the company or the emergencies immediately. In addition, we think that when rental company possesses a piece of information about our speed may be profitable, because we stay in touch with people working on this system who can help us how to avoid any commitment for speed limit or conflict with law. On the other hand, we have also ethical issues in our minds which are strictly related to standards of right and wrong. This has the power to damage the image of the organization and its moral as well. It is obvious that what is considered ethical by one person may seem the opposite to another. This advantage of the localization of the company’s cars are an invasion of our privacy. We are a bit hesitant to have our movements tracked every day, even if it’s for our good, and even if we have nothing to hide. We are not convinced enough that with a full consciousness of being observed we would drive a rented car with pleasure and convenience. 4. What competitive edge can Hertz get from the system? Michael E. Porter said that competitive advantage to value a company is able to create an advantage for their customers in the form of lower prices than competitors for equivalent benefits or the provision of differentiated products whose revenues exceed costs. For Porter, the value is the amount hat buyers are willing to pay for what the company provides. A firm is profitable if the value that you get from your buyers exceeds the costs required to create the product. Creating products for buyers whose values exceeds the costs is the goal of any business strategy. To analyze the value a company is able to create for its buyers, Porter uses what he calls the value chain or succession of business where value arises. Hertz has developed a business performance management to get a competitive edge. This performance has four steps: 1. Decide on desired performance levels. What the company wants to achieve is to be the major enterprise in the â€Å"rent a car† market. 2. Determine how to attain the performance levels. The company has to do different levels in the performance, a specific short-, medium-, and long-term plans. 3. Periodically assess where the organization stands whit respect to its goals, objectives, and measures. 4. Adjust performance and/or goals. In this market, Hertz can get a competitive edge by improving its services. When a company introduces something new in the market like Hertz, it can get a competitive edge until other companies make the same. In this case, Hertz is a â€Å"first mover† to information technologies and this makes the company different from the others. Now, whit something new, Hertz can get a competitive edge. SUMMARISE To sum up we think that Hertz has advantages which makes them one of the popular rental companies because they give their best services to each costumer. It bases its function on new technologies and uses them to achieve their productivity. The company possesses a lot of values, which are mainly connected with integrity, transparency, continuous improvement that is related to diversity of services and products. It has passion that involves commitment and there are very important values in the company, as teamwork that has a lot in common with accountability. Hertz mission in majority contains all the points focused on customer rights, cost efficient vehicles and its service to capture every market they’re occupied. They want to strengthen their worldwide position to a very large culture of employee and partnership. But there is more! It provides Frequent Traveler Credit and has a huge number of partners from airports, hotels, travel agencies, consumer loyalty to service partners. Hertz offers global opportunities to join its franchise network. The company leads Business to Business transactions, whereas both the sellers and the buyers are business organization. Business-to-business has about 85 percent of EC dollar volume. Thanks to this the company can cover applications that enable an enterprise to form electronic relationships with operators. For instance, some of the models for B2B application are sell-side marketplaces, buy-side marketplaces, and electronic exchanges.

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Power Electronics Intensive Solutions Essay Example for Free

Power Electronics Intensive Solutions Essay Abstract—There is a clear trend in the automotive industry to use more electrical systems in order to satisfy the ever-growing ve-hicular load demands. Thus, it is imperative that automotive elec-trical power systems will obviously undergo a drastic change in the next 10–20 years. Currently, the situation in the automotive in-dustry is such that the demands for higher fuel economy and more electric power are driving advanced vehicular power system volt-ages to higher levels. For example, the projected increase in total power demand is estimated to be about three to four times that of the current value. This means that the total future power de-mand of a typical advanced vehicle could roughly reach a value as high as 10 kW. In order to satisfy this huge vehicular load, the ap-proach is to integrate power electronics intensive solutions within advanced vehicular power systems. 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Advanced power elec-tronic converters and traction motor drives will be responsible for a major part of the vehicle’s energy usage. As of now, the automotive market is making rapid developments in case of the hybrid electric vehicles (HEVs). Commercially available HEVs include the Toyota Prius, Toyota Highlander Hybrid, Toyota Camry Hybrid, Lexus RX 400 h, Honda Insight, Honda Civic Hybrid, Honda Accord Hybrid, and Ford Escape Hybrid. In the case of future HEVs, power electronic converters and associated motor drives, which control the flow of electrical energy within the HEV power system, promise to be the keys to making HEVs more fuel efficient and emit lower harmful pollutants. Manuscript received March 15, 2005; revised October 26, 2005. Recom-mended by Associate Editor J. Shen. The authors are with Electric Power and Power Electronics Center, Illinois Institute of Technology, Chicago, IL 60616-3793 USA (e-mail: [emailprotected] edu). Digital Object Identifier 10. 1109/TPEL. 2006. 872378 As is well known, in the first half of the past century, the 6-V electrical system in automobiles served the purpose of ignition, cranking, and a satisfying few lighting loads [1]–[5]. Since then, there has been a constant rise in vehicular power requirement. Performance loads, such as electric steering, that were tradition-ally driven by mechanical, pneumatic, and hydraulic systems, are now increasingly being replaced by the electrically driven systems, in order to increase the performance and efficiency of operation. Furthermore, luxury loads have also increased over time, imposing a higher demand of electrical power [3]. It must be pointed out here that the rate of increase of automotive loads is assumed to be about 4% per year. Thus, such load demands have resulted in the need to scale up the onboard vehicular power level. Considering these aspects, several decades ago, the voltage was raised from its earlier 6-V level to the present day 12-V level and, now with an ever-in-creasing demand forecasted into the future, there is a need to switch over to much higher voltage levels of 42 V, 300 V, or higher, as the case may be [3]–[5]. Due to the high voltage levels being produced in HEVs, it becomes essential to have dc/dc converters to supply all the auxiliary loads on board the vehicle. Although the dc/dc converter technology is well devel-oped for low-power applications at lower cost, much work needs to be done for high-power applications. It is an immense chal-lenge to meet all the vehicle standards for electromagnetic in-terference (EMI) and electromagnetic compatibility (EMC) as well as specifications of reliability and packaging [4], [5]. In ad-dition, power electronic converters also dictate how and when fuel/electricity is used in HEVs. A suitable dc/ac inverter draws dc power from the batteries to drive the electric traction motor, which in turn provides power to the wheels. The dc/ac inverter also performs the function of recharging the batteries during re-generative braking in HEVs. Based on this fundamental background, proving the criticality of power electronics for HEV applications, this paper will re-view the role of power electronics and compare the associated advanced power system architectures for HEV as well as electric vehicle (EV) and fuel cell vehicle (FCV) applications. The var-ious design issues for power electronics intensive HEV and FCV power systems and the current and future trends will be high-lighted. In addition, the proposed 42-V PowerNet is also focused upon, emphasizing on the description of its key capabilities and requirements. Furthermore, the paper will also discuss the mild hybrid vehicle, wherein the major opportunities for automotive power electronics are outlined. Finally, few system-level issues 0885-8993/$20. 00  © 2006 IEEE 568IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 21, NO. 3, MAY 2006 Fig. 1. Conventional 14-V dc power system architecture. that drive the relative power electronics size and cost functions will also be addressed. II. CONVENTIONAL AUTOMOTIVE POWER SYSTEMS AND| Fig. 2. Typical representation of the more electric hybrid vehicle power system| | CONCEPT OF MORE ELECTRIC VEHICLES (MEV)| | || architecture. | | During the mid 1950s, the automotive industry decided to| | | opt for 12-V electrical power systems for vehicles, since the| | | then popular 6-V system was rapidly becoming plagued by the| and rear-wheel steering, which will be driven electrically in the| | increasing vehicular load demands. The battery became a six-| future. | | cell module instead of three cells, at approximately the same| As is well documented in related literature, most of the fu-| | energy rating. The electrical system demand had risen from the| ture advanced electric loads require power electronic controls. | | 100 W of the early 1900s to typically about 1 kW by the 1990s,| In advanced future vehicles, power electronics is forecasted to| | as more and more electrically powered devices were installed| perform three major tasks. First task is simple on/off switching| | [6]–[8]. | of loads, which is performed by mechanical switches and relays| | The conventional electrical system in an automobile can| in conventional cars [7]. The second task is to act as a suitable| | essentially be divided into the architectural elements of energy| controller for electric traction motors. Finally, power electronics| | storage, generation, starting, and distribution. The distribution| intensive power systems will not only be used for the obvious| | system of a conventional 14-V power system satisfies vehicular| task of changing system voltage levels, but also for converting| | loads such as, interior/exterior lighting, electric motor driven| electrical power from one form to another, using dc/dc, dc/ac,| | fans/pumps/compressors, and instrumentation subsystems [6]. | and ac/dc converters. | | A simple rendition of the conventional 14-V electric power| As mentioned earlier, due to the ever-increasing electrical| | system architecture is shown in Fig. 1. | loads, the automotive industry is opting for more electric power| | As is clear from Fig. 1, the conventional power system ar-| systems. Due to this, MEVs will need highly reliable and fault-| | rangement has a single 14-V dc voltage level, with the vehic-| tolerant electrical power systems to deliver high quality power| | ular loads being controlled by manual switches and relays. As| from the source to the electrical loads. It is extremely important| | mentioned earlier, the present average power demand in an au-| that the voltage level/form in which power is distributed be taken| | tomobile is approximately 1 kW. The voltage in a 14-V system| care of. A higher voltage will reduce the weight and volume| | actually varies between 9 and 16 V at the battery terminals, de-| of the wiring harness, among several other advantages [7], [8]. | | pending on the alternator output current, battery age, state of| Fig. 2 shows the concept of a future hybrid MEV, making use| | charge, and various other minor factors [6], [7]. This results in| of high voltage (300 V) automotive power system architecture. | | overrating the loads at nominal system voltage. In addition to| Currently, the proposed MEVs are at a transitional stage, in-| | these disadvantages, the present 14-V system cannot handle fu-| volving different systems voltage levels [8]. It is expected that| | ture electrical loads to be introduced in the more electric envi-| the future MEV power systems will most likely be comprised of| | ronment of the future cars, as it would be expensive and ineffi-| a single main voltage bus (high voltage) with a provision for hy-| | cient to do so.| brid (dc and ac), multivoltage level distribution and intelligent| | In more electric vehicles (MEVs), there is a trend toward| energy and load management. | | expanding electrical loads and replacement of mechanical| | | and hydraulic systems with more electrical systems. These| III. ADVANCED DRIVE TRAIN ARRANGEMENTS FOR ELECTRIC,| | loads include lights, pumps, fans, and electric motors for var-| | | | HYBRID ELECTRIC, AND FUEL CELL VEHICLES| | ious functions. In addition, they also include some advanced,| | | | | |electrically assisted vehicular loads, such as power steering,| This section introduces the various drive train arrangements| | air conditioner/compressor, electromechanical valve control,| of pure battery electric vehicles (EV), series/parallel/series-par-| | active suspension/vehicle dynamics, and catalytic converter| allel/complex HEV drive trains, and pure FCV/hybrid FCV| | [6]. Furthermore, additional advanced vehicular loads include,| drive trains. Based on the review done in this section, the| | anti-lock braking, throttle actuation, ride-height adjustment,| ensuing sections will focus on the power electronics intensive| |. EMADI et al. : POWER ELECTRONICS INTENSIVE SOLUTIONS| 569| Fig. 3. Topological arrangement for an electric vehicle (EV) drive train. power system architectures for these advanced drive train arrangements. A. Battery Electric Vehicle (EV) Drive Train Topology A purely electric drive system principally replaces the internal combustion engine (ICE) and the various transmis-sion systems with an all-electric system. As is well known, rechargeable chemical batteries are the traditional option as en-ergy sources for EVs. But they tend to be heavy and expensive to replace over their limited lifetimes. In addition to traditional batteries like lead–acid, nickel metal–hydride (Ni–MH), and nickel–cadmium (Ni–Cd), there are advanced technologies like lithium–polymer (Li-polymer) and lithium–ion (Li–ion) bat-teries. Despite the popularity that these advanced batteries have gained for portable electronic applications, they haven’t quite maintained the same reputation for use in EVs. Most practical EVs still use lead-acid batteries, with the more sophisticated ones using Ni–MH batteries [8], [9]. A basic overview of a battery electric vehicle (BEV) is as shown in Fig. 3. More recently, the automotive industry is cutting back on EV production, and has declared HEVs and FCVs to be the future of advanced vehicle technologies. This is because BEVs cost sig-nificantly more than gasoline vehicles, due to the fact that EV battery modules are currently being produced in very small vol-umes [9]–[11]. Higher vehicle prices are partially offset by the fact that fuel costs for battery electrics are about one-third those of a gasoline-powered vehicle. In addition, BEVs have fewer moving parts than gasoline cars, and hence, require less mainte-nance. The future of battery EVs is somewhat uncertain at this time, but their development has already made important contri-butions to advancing electric drive train and storage technolo-gies needed by both HEVs as well as FCVs [10], [11]. If further breakthroughs in battery technologies occur, BEVs could yet prove to be the future of clean transportation. B. Series HEV Drive Train Topology A series hybrid vehicle is basically an electric vehicle with an on-board battery charger. An ICE is generally run at an optimal efficiency point to drive the generator and charge the propul-sion batteries on-board the vehicle, as shown in Fig. 4. When the state of charge (SOC) of the battery is at a predetermined minimum, the ICE is turned on to charge the battery [12]–[15]. The ICE turns off again when the battery has reached a desir-able maximum SOC. The engine/generator set maintains the battery charge around 65%–75%. It must be noted that, in a se- Fig. 4. Typical layout of a series HEV drive train. Fig. 5. Schematic of a parallel HEV drive train configuration. ries HEV, there is no mechanical connection between the ICE and the chassis. The advantage with the series HEV configuration is that the ICE is running mostly at its optimal combination of speed and torque, thereby, having a low fuel consumption and high effi-ciency. However, there are two energy conversion stages during the transformation of the energy between the ICE and the wheels (ICE/generator and generator/motor) [16], [17]. Some energy is lost because of the two-stage power conversion process. A se-ries hybrid vehicle is more applicable in city driving. C. Parallel HEV Drive Train Topology A hybrid vehicle with the parallel configuration has both the ICE and the traction motor mechanically connected to the trans-mission. A schematic figure of the parallel hybrid is shown in Fig. 5. The vehicle can be driven with the ICE, or the electric motor, or both at the same time and, therefore, it is possible to choose the combination freely to feed the required amount of torque at any given time [18]–[20]. In parallel HEV, there are many ways to configure the use of the ICE and the traction motor. The most widely used strategy is to use the motor alone at low speeds, since it is more efficient than the ICE, and then let the ICE work alone at higher speeds. When only the ICE is in use, the traction motor can function as a generator and charge the battery. A parallel HEV can also have a continuously variable transmission (CVT) instead of a fixed step transmission [19], [20]. With this technique, it is pos-sible to choose the most efficient operating points for the ICE 570IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 21, NO. 3, MAY 2006 Fig. 6. Typical drive train configuration of a series-parallel combined HEV. Fig. 7. Schematic of a complex HEV drive train. at given torque demands freely and continuously. The result is lower fuel consumption due to the inherently more efficient fuel usage. Energy is also saved due to regenerative braking. The advantage with the parallel HEV configuration is that there are fewer energy conversion stages compared to the se-ries HEV and, therefore, a lesser part of the energy is lost [19]. In fact, the parallel HEV drive train depicts fairly lower losses compared to other HEV topologies and, hence, has a compara-tively higher overall drive train efficiency. D. Series-Parallel HEV Drive Train Topology The series-parallel HEV is a combination of the series and parallel hybrids. There is an additional mechanical link between the generator and the electric motor, compared to the series con-figuration, and an additional generator compared to the parallel hybrid, as shown in Fig. 6. With this design, it is possible to com-bine the advantages of both the series and parallel HEV config-urations [20]. It must be highlighted here that the series-parallel HEV is also relatively more complicated and expensive. There are many possible combinations of the ICE and traction motor. Two major classifications can be identified as electric-in-tensive and engine-intensive. The electric-intensive series-par-allel HEV configuration indicates that the electric motor is more active than the ICE for propulsion, whereas, in the engine-inten-sive case, the ICE is more active [20], [21]. A common opera-tive characteristic for both types of series-parallel HEV systems is that the electric motor is used alone at start with ICE turned off. During normal driving, the ICE alone propels the vehicle in the engine-intensive case. On the other hand, the ICE and electric motor propel the vehicle in the electric-intensive case [20]. When acceleration is needed, the electric traction motor is used in combination with the ICE to give extra power in both of the configurations. During braking or deceleration, the trac-tion motor is used as a generator to charge the battery and, in stand still, the ICE can continue to run and drive the generator to charge the battery, if needed. Another form of series-hybrid configuration is shown in Fig. 7, which is a power split HEV topology. This topology includes a planetary gearbox, which connects the ICE, traction motor, and generator. Varying the speed from the two planetary gear pinions, connected to the electric motor and the generator, can control the ICE speed. When the ICE turns off, the vehicle is propelled in the pure electric mode. However, at most of the operating points, the energy flows in a similar fashion to either that of a parallel HEV or to that of a series HEV. In parallel HEV mode, energy flows from ICE via the gearbox to the wheels, whereas, in the series HEV mode of operation, the energy flows from generator and motor to the wheels [21]. The proportion between these two energy flows depends on the overall vehicle speed. Under most operating conditions, this configuration is a combination of series and parallel hybrid vehicle. It is also possible to operate this in parallel mode for some operating conditions. One of the motivating factors for use of the power split HEV topology is to increase the vehicle power capability for a given transmission. This in turn enables the usage of continuously variable transmission concept for light duty HEV propulsion ap-plications, such as pick up trucks and small buses. E. FCV Drive Train Topology. The potential for superior efficiency and zero (or near zero) emissions has long attracted interest to fuel cells as the potential automotive engine of the future. However, systematic efforts to realize the efficiency and emissions benefits of fuel cells in the transportation sector have materialized only in the last 10 years. The overall goal of ongoing fuel cell research and development programs is to develop a fuel cell engine that will give vehicles the range of conventional cars, while attaining environmental benefits comparable to those of battery-powered electric vehi-cles. Although the technology is currently quite expensive, fuel cells offer benefits including high overall efficiency and quiet operation due to few moving parts. A typical fuel cell based propulsion system is shown in Fig. 8. The hydrocarbon fuel such as gasoline, natural gas, methanol, or ethanol is first reformed to obtain the required hydrogen using a reformer (or fuel processor) [22]. This hydrogen rich gas from the reformer is fed to the anode of the fuel cell. It is also possible to store the on-board the vehicle using a pressurized cylinder, instead of using the reformer for con-verting the fuel to -rich gas. The oxygen (or air) is fed in to the cathode fuel cell. Depending on the fuel cell stack configu-ration, and the flow of hydrogen and oxygen, the fuel cell stack produces the dc output voltage [22], [23]. The fuel cell stack EMADI et al. : POWER ELECTRONICS INTENSIVE SOLUTIONS| 571| Fig. 8. Typical topological arrangement of a hybrid fuel cell vehicle drive train. output is fed to the power conditioner (power electronic con-verter) to obtain the required output voltage and current. Ide-ally, the power conditioner must have minimal losses leading to a higher efficiency. Power conditioning efficiencies can typ-ically be higher than 90% [24]. IV. POWER ELECTRONICS INTENSIVE POWER SYSTEM ARCHITECTURES FOR HEVS A. Advanced Electrical Features in Future HEV Technologies As mentioned earlier, there is a trend in the automotive in-dustry to replace more engine driven mechanical and hydraulic loads with electrical loads, due to higher efficiency, safety re-quirements, and driver’s comfort. All of these new functions re-quire the application of power electronics. In most of the cases, the cost of the power electronics dominates the argument of in-troducing such functions. Many of these functions will only ap-pear in concept vehicles in the projected future. Some of these include luxury loads, such as information and entertainment that have received lots of hype recently. The other class of features is -by wire, where â€Å"† stands for an advanced function such as, â€Å"steer† or â€Å"brake. † Another class of advanced electrical features includes power steering pump, electric ac-tive suspension system, electromechanical valve control, elec-trically heated catalytic converter, air-conditioning systems, and water/oil/fuel pumps [25]. There are also other loads such as throttle actuation, ride-height adjustment, rear-wheel steering, which are proposed to be driven electrically in the future. Fig. 9 depicts a summary of some of the future electrical features auto-motive power systems. It is virtually mandatory that most of the proposed future electric loads will indeed require power elec-tronic controls of some sort. B. Advanced HEV Topology Using ISA System In view of research and development work for MEVs, it must be pointed out that one of the leading breakthroughs in the au-tomotive industry is the introduction of the integrated starter-generator (ISG) system for mild HEVs [26]. The ISG is pri-marily an electric machine with a rotor instead of a flywheel mounted on the crankshaft between the ICE and transmission. A schematic diagram of an ISG system used in conjunction with a high-voltage vehicular power system is shown in Fig. 10. The Fig. 9. Future electrical features in more electric vehicle power systems. Fig. 10. Integrated starter-alternator (ISA) based HEV drive train. ISG provides the functions of an electric starter and an alternator [26], [27]. By using suitable advanced power electronic con-verter systems, it is possible for the ISG to compensate the drive train oscillations to provide more comfort. The power electronic converter system controls the ISG operating state, depending on the load status and the battery charge status. Improved fuel economy and reduced emissions are two prime advantages of an ISG system. Using a start/stop cycle, the ICE is turned off during deceleration or after the vehicle comes to a complete stop. The ISG can be used to propel the vehicle from a stop condition (and/or at a set speed), to restart the ICE. The ISG will also be able to route power produced by regenerative braking into the energy storage devices (batteries or ultra-capac-itors) [26], [27]. It can also be used to provide power enhance-ment, when taking off from a stop, or in added acceleration for passing. C. 42-V/12-V Dual-Voltage Vehicular Electrical Systems The 42-V/12-V dual-voltage architecture is being popularly touted as one of the solutions for the ever-increasing in-vehicle load demand. The operating voltage criteria being considered for 42-V systems are shown in Fig. 11. The maximum dynamic over voltage is limited to 58 V, including the transient voltages 572IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 21, NO. 3, MAY 2006 Fig. 11. Typical operating voltage criteria for 42-V HEV power systems. Fig. 13. Schematic of a dual voltage (14 V and 42 V) architecture using one battery. Fig. 12. Schematic of a dual voltage (14 V and 42 V) architecture using two batteries. [28]. In this case, the system charging voltage is set at 42 V. The entire electrical system in the vehicle is run at a nominal value of 42 V, whenever the engine is running. Some of the advantages of such a system include, high efficiency and performance, less expensive operational procedures, reduced total installed power due to the integration of the mechanical and hydraulic power into the electrical power system, and reduction in the overall design complexity. The transition to an entirely 42-V dominated architecture cannot be done immediately. Therefore, it is assumed that a dual voltage automotive power system will exist at least for a while. There are various ways to implement a power electronics intensive dual voltage power system. The schematic used in Fig. 12 illustrates a dual (42 V–14 V) battery system. Fig. 13 shows a schematic using only one single 42-V battery, and Fig. 14 illustrates a structure in which the dual voltage is generated by a single alternator, which has two output voltages. In the dual battery system, the first (36-V) battery is optimized for high power delivery, while the second (12-V) battery is optimized for low powers to support key-off loads plus hazard lamp operation [28], [29]. In other words, in this structure, the starting function will be isolated from the storage function required for â€Å"key-off† loads. This architecture provides oppor-tunities to improve existing high power loads by moving them to the 42-V side. It also minimizes changes to existing 14-V features, like lighting loads. However, this system has two batteries, which when com-pared with today’s one 14-V battery, implies more cost, weight, and packaging space. The other new component in this system is Fig. 14. Schematic of a dual stator dual voltage (14 V and 42 V) architecture using two batteries. the 42-V/14-V dc/dc converter. The overall cost of power elec-tronics is still considered too high for automotive applications. However, power electronic converters are capable of providing seamless energy transfer between two energy storage batteries and help improve reliability of some critical vehicular functions, which require a backup battery. In contrast, the single battery schematic of Fig. 13 is based on the desire to avoid cost, weight, and packaging problems cre-ated by the additional battery. The idea is that the power man-agement system should be smart enough to manage the key-off loads from depleting the high-voltage battery to the point that the vehicle cannot be started [29]. It is critical to point out here that this architecture also uses a bidirectional dc/dc converter be-tween the 42-V and 14-V buses. The schematic shown in Fig. 14 uses a more complicated alternator, with two sets of stator wind-ings, to provide power separately to the 42-V and 14-V buses. In this structure, again, high power loads are connected to the 42-V bus and the 14-V bus supplies low-power electrical mod-ules [29]. In addition to the above-described architectures, there exist many other strategies and variations of dual-voltage automo-tive power systems. The auto industry at this point is stagnant with regards to selecting appropriate dual-voltage MEV archi-tectures. One of the main focal points of research in selecting EMADI et al. : POWER ELECTRONICS INTENSIVE SOLUTIONS a suitable MEV system is to determine which options provide the best economic value to possible customers. The other major concerns with the introduction of 42-V power systems are phys-ical and practical viability aspects, such as arc faults and ensuing fire hazards. These and various other practical issues are dis-cussed in the following section. 1) Practical Issues Related to 42-V Automotive Power Sys-tems: As is apparent, by increasing the present 14-V network to 42-V, significant component and system changes within the vehicle will be necessitated. One of the major motives for this change is because of the nature of faults and their subsequent consequences, due to the higher current carrying wires in a 42-V automotive power system environment. It is obvious that the ten-dency is to produce longer arc faults, which have to be addressed to provide automotive safety. Wires that are semi-cut or scraped, in all probability, cause longer arc faults at higher system volt-ages. Furthermore, various research issues also arise from the point of view of vehicular power electronics and motor drives. For example, by reducing the mild HEV power system operating voltage (from 150 V/300 V to 42 V), the required current to pro-vide the necessary power increases. Thus, this corresponds to the entire winding of the electric traction machine to be restruc-tured. Issues such as heat transfer and protection also require a detailed investigation before the 42-V architecture becomes practicable in the auto industry. On the other hand, power electronic switches in 42-V sys-tems may be required to handle RMS currents in the proximity of about 400 to 500 amps/phase [29]. Currently, in order to switch such high profile currents, parallel-operated power electronic switches are being proposed, since using single-level switches is highly uneconomical. Recently, advanced MOSFET switches have been introduced for use with prototype 42-V automotive power systems. Trench IGBTs have also made noteworthy progress from the point of view of providing 42-V architectural solutions, wherein the research focus is mainly on solving reliability and short-circuit current capability issues. D. Power Electronics Solutions for HEVs Power electronics is an enabling technology for next genera-tion of vehicles, which should be cleaner, smarter, more precise, more efficient, and more flexible. In the past decades, power electronic devices were avoided mainly because of their cost issues. The reasons for increased interest in automotive power electronics can be separated into the ensuing sections. 1) New Architectures: By increasing new electrical loads, cost and complexity of the system is on the increase. Such archi-tectures need new switching and reliability features. Power elec-tronics makes the possibility of integrating switching and fusing functions into one component with higher reliability. Possibility of implementing different control methods on power electronic systems is another reason to go away from relay switching. Also, by implementing integrated sensing techniques in power elec-tronic devices, diagnosis and fault detection becomes easier to implement. Furthermore, development of clean and energy effi-cient vehicles in future vehicle technologies such as EVs, HEVs, 573 and FCVs is not possible without implementing new architec-tures, which are available using power electronics. 2) Power Conversion on Demand: Most of the auxiliary drives in vehicles are designed for worst-case scenarios. Power electronics and motor drive topologies make it easier to have higher efficiency by providing adjustable speed drives. Es-pecially, engine-cooling fans have been designed recently, implementing power electronic controls and adjustable speed drives. 3) Voltage Conversion on Demand: Different components in vehicles need different levels of voltages. Different voltage levels in dual-voltage architecture are available using power electronic converters. Induction or synchronous machines need ac voltages with high power for propulsion, and small motors for fans and pumps require ac voltage with low power [30], [31]. Converting dc-to-ac voltages and dc-to-dc voltages with different voltage levels is not possible without using power elec-tronic converters. 4) Precise Electronic Control: Engine controls such as igni-tion or fuel injection need precise timing and dynamic control of actuators. Fuel injectors should work on very high pressure with more precise opening time. Engine developers are working on systems to replace the camshaft with electronically controlled variable valves, promising up to 25% more fuel economy. These controls cannot be imagined without the use of power elec-tronics. 5.

An Analysis of Emily Dickinsons Poem #315 :: Emily Dickinson Poem 315 Essays

An Analysis of Emily Dickinson's Poem #315 I believe that this poem can be interpreted in many different ways. Who is to say that there can only be one explanation or meaning to Dickinson's #315? Since being introduced to this poem, I have heard many different interpretations either from others in my group or from reading about it in web sites or books. In this close reading, I will concentrate on the very first word of this text: He. I will explain who I think this person is and how "He" is responsible for the actions in this poem. In my view, I think the one doing the action in this poem or, "He," is some form of deity. Whether it is God or just a god is beyond my comprehension. I think the only one who knows that answer is Emily Dickinson herself. At first thought, however, I envisioned a supreme Zeus-like god playing the song that is our lives like a musical instrument. We travel through life's trials and tribulations, provided by this being, and we ultimately die at the hand of him. The first line not only introduces this character but explains that his hands are guiding our souls. The mental image I received from the word "fumbles" (line 1) is a simple one. I thought of someone throwing bits of mozzarella cheese on top of a pizza getting ready to be cooked! This can be symbolic of our supreme being throwing at us the events of our lives as it fumbles through his hands with no concern or compassion as to where it falls. The next line verifies this image. "As Players at the Keys" (line 2) is symbolic of a pianist playing the song that is our life. However, the plural usage of "player" might suggest more than one god is in control of our existence. Like a song with its peaks and valleys (representing our life) the pianist's ("He," or, the gods) fingers strike at the "keys" with varying tempo's and force. This also ties in to lines three and four. "Before they drop the full music on - He stuns you by degrees-" At this point I feel Dickinson is trying to tell us that those who are in control of our soul are not in our favor.

Psychology Reflective Paper Essay

This class has not only enabled me to become a better student, but also a more productive adult in various ways. Initially, I came into your class ecstatic because I knew the journey I would embark would be an exciting one; however, I encountered challenges throughout the course although learning new psychological methods is enthusing to me. I learned about the origin of psychology and the evolution of modern psychology. In further detail, I will discuss how the learning goals of this course have influenced my career and personal life. When I began college, I was undecided about what to study. Initially, I enrolled as Biology major. I majored in biology for three years of my college career. Because I was not happy or even satisfied, I decided to pursue studying a subject that genuinely grasped my interest. I knew in my heart that whatever I was searching for had to be something I would love doing for the rest of my life or at least most of it. Therefore, I went on an exploration to find that one particular area of study that would be of great significance to me and my future endeavors. I came across Psychology. I didn’t know much about it. All I knew was that I took it during my freshman year because it was a requirement to take Psychology 101. The entire time while I was reminiscing about this class, all I could remember was the professor lecturing about the human mind and why people do what they do. I found it to be sort of interesting and I said, â€Å"Hey, why not give it a try?† Previously, I had skeptic views. I contemplated about making this big change because I thought there was nothing else left for me to do but to†¦ â€Å"Just do it!† Because I am new to everything that is going on around me within my Psychology courses, there is plenty that I wish to obtain and learn: not just from my professors but also from my peers. One class that I have taken is History and Systems of Psychology, and it is one of my most interesting Psychology courses here at the University. This course is very different from many classes that I have taken. There are seminars, blogs, essays, Greeks, and much more that surround this course. The seminars consist of in class discussions where we converse about different readings and how we feel about what was read, as well as what the writer was trying to convey to his or her audience. Sometimes the discussions can become intense but it is stimulating. I am not much of a public speaker, but the seminars are beneficial to me conquering my phobia of speaking in front of a crowd of people. The course is informative but surprisingly it isn’t boring. I perceive as motivation to do well through the learning goals that are set out before us by the professor. Contrary, to my previous study of Psychology, I have learned a vast amount of information from being in this course. Yes, History and Systems of Psychology will inform and teach me about the ancient Greeks and their attributes towards the development of Psychology but I will also learn skills that will definitely be beneficial in my career as a Speech Pathologist. A Speech Pathologist evaluates and diagnosis speech, language, cognitive- communication and swallowing disorders. They also treat speech, language, cognitive- communication and swallowing disorders in individuals of all ages, from infants to the elderly. The class is not only lecturing, but also growth for future purposes. My fellow classmates and I will be able to network with one another on a more intellectual level. We are all able to discuss our opinions about different topics through seminars. This is a way to help better our communication and listening skills. Patience is gained when waiting for others to speak, even though you may be eager to express your views on a particular situation. It helps us to be more open-minded to others’ opinions which provide us with the opportunity to learn from one another and just the professor. Because it is proven that the focus of psychological studies in modern society may not reflect its colorful and amusing history, its roots however fluctuate from the modern philosophies of the field. In order to totally comprehend psychology, one must first go back into its history and explore its origins. A question that I asked myself and became informed of throughout the course of this semester is: â€Å"How did the studies of Psychology originate? What period was Psychology created?† Because I was able to question myself, I became more involved and interesting not only in Psychology 445, but the overall studies of Psychology. As I answered these questions, I realized that Psychology involves a massive range of topics; alongside, examining the human’s developmental patterns and mental practices from cultural level to neural level. Interestingly, I learned that Speech Pathologists study the same materials as Psychologists. For example, both patricians must know matters pertaining to human mental concerns. These issues can begin right from delivery and endure up until the death of the person. Through the knowledge developed in Psychology 445, I will be able to better comprehend how the individual topics are studied and what has been taught thus far. One of my most beloved and studied psychologist has been Sigmund Freud (Freud). Independently, I studied Freud; the famous Austrian physician transformed the entire face of psychology in such an intense way by creating a theory of personality that strained on the significance of the unconscious mind. Freud’s involvement with clients anguish from mental ailments like hysteria directed him to consider that one’s early childhood encounters as well as our unconscious impulses contribute greatly towards the development of our adult lifestyle behavior and characteristics. You may ask yourself: â€Å"Why is this information important to?† As stated in our learning goals there are many historical psychologists who can give an account for the evolution of modern psychology. It is important for me to understand the history and previous studies because past determinations will enable me to diagnose my clients when I work as a speech pathologist. There are commonalties between psychologist and speech pathologist. Because of these similarities, I have encountered psychological skills that I plan to utilize as a speech pathologist. Interestingly, Psychology continues to evolve! Currently, majority practices do not identify themselves with a distinct school of thought. Instead, workers prefer focusing on certain specialty ranges or perspectives, often creating conclusions from a wide range of theoretical experiences. This methodology has contributed new theories and ideas that still carry on to shape the future of psychology. In conclusion, I learned quality listening and observance skills. In order for me to be a good Speech Pathologist, I must be able to listen and communicate with the patients. I must be patient, stable, tolerant of others, confident, and the ability to communicate effectively, both orally and in writing. Surprisingly, in class being emotionally stable really is a great trait to have and learn. Because everyone does not have identical in personalities and background life experiences, everyone may not think alike. In most cases, when there is a discussion and there are many different thoughts and opinions being tossed in the air, some individuals tend to become a little upset because they may feel that what they believe is correct. However, when engaging in conversation with others who may have different point of views, there is no right or wrong. Therefore, having emotional stability is important. I believe that this change which I have made is for the best. I feel that with every moment I attend class, I am discovering something new and opening myself up to bigger and brighter opportunities.

Adult Cystic Acne - 901 Words

What is adult cystic acne? Adult cystic acne is, unfortunately, one of the worst possible forms of acne. Once thought to be a phenomenon prevalent exclusively among children and adolescents, cystic acne is fast becoming a more and more frequent affliction experienced by adults. The only difference between cystic acne and adult cystic acne, therefore, is the age of the sufferer. Cystic acne is characterized by large bumps, lesions and severe redness and inflammation in the affected area. Cystic acne bumps are actual cysts, which can be described as infected, oily, pus and bacteria-filled mounds that form just under the skin. It can take over different parts of your body, such as your back and shoulders, but, as with most acne, the face is the most common site of the problem. It can be quite painful, disfiguring and lead to permanent scarring, which can cause a deep plunge in your self-esteem. What causes it? There are several factors that contribute to the onset of cystic acne in adults. The immediate cause is an overproduction of oil, usually brought on by the hormone imbalance or overactive glands, which leads to clogged pores. This interferes with the skin’s normal renewal process, rendering it unable to properly dispose of dead skin cells. This can result in serious bacterial infections that are a precursor to cystic acne. Although the problem is largely out of your hands, it can be exacerbated by external factors, such as: †¢ Heavy use of lotions and beauty creamsShow MoreRelatedExplain the Potential Effects of Five Different Life Factors on the Development of an Individual1779 Words   |  8 Pageswould have looked pale, grey and tired especially a few days after consuming the alcohol. As well as this alcohol would have dried out his skin and have leaded to wrinkles and premature aging. 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