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Wednesday, October 30, 2019
Financial Reporting Systems and Economic Development Essay
Financial Reporting Systems and Economic Development - Essay Example The role of the financial reporting system, as supported by accounting standards, the law and the ethics, in economic development is reviewed and analyzed in this paper. Particular emphasis is given on faithful representation, as an indicator of the reliability of financial statements. Also, the circumstances under which true and fair override apply are identified and explained. It is proved that faithful representation, in its current form, is something more than simple a compliance with accounting standards. One of the most critical issues when having to evaluate the quality of financial statements is that these statements should achieve faithful representation. In order to understand the role of ‘faithful representation’, as an element of the financial reporting systems, it would be necessary to refer to these systems, as the basis on which a firm’s financial practices are usually based. In accordance with Uddin et al., two major financial reporting systems are considered as the most credible for businesses in all sectors: the US Generally Accepted Accounting Principles (US GAAP) and the IFRS.1 The use of one of these systems, which have been appropriately tested as of the effectiveness in financial reporting, results to the increase of credibility of the local economy. From this point of view, it has been proved that the use of these systems within a particular country leads to the increase of the foreign direct investment (FDI) to the above country. Thus, accounting standards and financial reporting are closely related to the performance of the local economy, of course under the terms that global financial markets are stabilized, i.e. that these markets do not suffer from delays in the implementation of financial and other projects. In the literature the term ‘faithful representation’ has been given various explanations, which are all similar. For example, in the study of Hussey reference is made to the use of the term fait hful representation in order to show the reliability of the financial statements involved.2 In other words, the specific term is used in order to indicate the fact that the information included in the financial statements is accurate and responds to the actual financial status of the organization. Apart from reliability, the term ‘faithful representation’ also reflects the completeness of information included in the financial statements.3 The financial statements are considered as complete when they include all necessary information.4 A similar approach in the description of faithful representation is included in the study of Needles et al. In accordance with the above researcher, the term ‘faithful representation’ means that the financial statement involved is ‘complete, neutral and free from error’.5 It is further explained that the phrase ‘free from error’ does not imply the full accuracy of the particular financial statement, a s such requirement is quite difficult, almost impossible, to be achieved since financial statements are highly based on estimations.6 At this point, the following problem appears: how the reliability of financial statements is proved? The fact that there are some transactions that cannot be measured, at least not precisely, is highlighted in the study of Hussey.7 On the other hand, the availability of the data involved is an issue that needs to be carefully considered when having to
Monday, October 28, 2019
Linguistics and Language Essay Example for Free
Linguistics and Language Essay The term dialect (from the ancient Greek word dialektos, discourse, from dia, through + lego, I speak) is used in two distinct ways, even by linguists. One usage refers to a variety of a language that is a characteristic of a particular group of the languages speakers. The term is applied most often to regional speech patterns, but a dialect may also be defined by other factors, such as social class. [2] A dialect that is associated with a particular social class can be termed a sociolect, a dialect that is associated with a particular ethnic group can be termed as ethnolect, and a regional dialect may be termed a regiolect or topolect. The other usage refers to a language that is socially subordinate to a regional or national standard language, often historically cognate to the standard, but not a variety of it or in any other sense derived from it. Dialect: This is a complex and often misunderstood concept. For linguists, a dialect is the collection of attributes (phonetic, phonological, syntactic, morphological, and semantic) that make one group of speakers noticeably different from another group of speakers of the same language. COMMON SOURCES OF MISUNDERSTANDING: 1) DIALECT is NOT a negative term for linguists. . Often times, for example, we hear people refer to non-standard varieties of English as dialects, usually to say something bad about the non-standard variety (and thus about the people who speak it). This happened quite a bit during last years ebonics controversy. But, the term dialect refers to ANY variety of a language. Thus, by definition, we all speak a dialect of our native language. 2) DIALECT is NOT synonymous with accent. Accent is only a part of dialectal variation. Non-linguists often think accents define a dialect (or that accents alone identify people as non-native or foreign language speakers). Also, non-linguists tend to think that its always the other people that have an accent. So, what is accent? 3) ACCENT: This term refers to phonological variation, i. e.variation in pronunciation Thus, if we talk about a Southern Accent; were talking about a generalized property of English pronunciation in the Southern part of the US. But, Southern dialects have more than particular phonological properties. Accent is thus about pronunciation, while dialect is a broader term encompassing syntactic, morphological, and semantic properties as well. A final note on accent. WE ALL HAVE ONE! There is no such thing as a person who speaks without an accent. This is not an exercise in political correctness, by the way. It is a fact. In sum, a dialect is a particular variety of a language, and we all have a dialect. Accent refers to the phonology of a given dialect. Since we all have a dialect, we all have an accent. Idiolect: Another term that we must be familiar with is idiolect. Whats an idiolect? you ask, on the edge of your seat. An idiolect is simply the technical term we use to refer to the variety of language spoken by each individual speaker of the language. Just as there is variation among groups of speakers of a language, there is variation from speaker to speaker. No two speakers of a language speak identically. Each speaks her or his own particular variety of that language. Each thus speaks her or his own idiolect. Role of Dialect: Language says a lot about our identity. Americans, Australians, New Zealanders and South Africans all speak differently. When we meet somebody from a different part of the country, they may use different words, sounds or grammatical structures. A dialect is a variety of language that is characteristic of a certain area. For instance, in the Northern Cape, people refer to older people as grootmense and paper as pampier whereas in Pretoria they are called oumense and papier. If you hear colored people from Cape Town speaking Afrikaans, they sound different to Afrikaans spoken elsewhere. People from Natal speak English in different ways to people from Johannesburg etc. So often, the way we speak says a lot about where we are from, who we are and what we care about. So studying dialects is one way of validating peoples identities and ways of life. Characteristics of Dialect: There are ten characteristics of dialect. 1. Dialect can be identified by variation of grammar. 2. Dialect can be identified by variation of vocabulary. 3. Dialect can be identified by variation of prosody. 4. Dialect can be identified by variation of sentence structure. 5. Dialect can be identified by variation of figures of speech. 6. Variance of parent language by social class of speakers. 7. Variance of parent language by region inhabited by speakers. 8. Likely will not have its own written literature. 9. Likely speakers will not have state or nation of their own. 10. Likely region-specific for speakers. Difference between Dialect and Register: To describe differences we have to first understand these two terms separately. What is Dialect? A regional or social variety of a language distinguished by pronunciation, grammar, or vocabulary, especially a variety of speech differing from the standard literary language or speech pattern of the culture in which it exists: Cockney is a dialect of English. What is Register? In linguistics, a register is a variety of a language used for a particular purpose or in a particular social setting. For example, when speaking in a formal setting, an English speaker may be more likely to adhere more closely to prescribed grammar, pronounce words ending in -ing with a velar nasal instead of an alveolar nasal (e.g. walking, not walkin'), choose more formal words (e. g. father vs. dad, child vs. kid, etc. ), and refrain from using contractions such as aint, than when speaking in an informal setting. Now it is time to differentiate both terms. A dialect is a variety of language used by different speech communities, whereas register is a variety of language associated with peoples occupation. Register is to do with variation in language use connected with topic matter. Ones dialect shows who (or what) he/she is, while ones register shows what he/she is doing. Dialect is a special form of speaking belonging to a group. Register is a linguistic term used to describe changing how one talks based on the situation. 1. Dialect: a local variety of a language*, usually understood by speakers of other dialects of the same language, often without a standardized grammar or spelling, used mostly for non-formal purposes in a local community or among people coming from the same community but living in another community than that they came from. There is often no consensus if such a local language variety is a dialect or a language. The choice is usually taken on the basis of political or conventional criteria and never on linguistic ones. 2. A speech register: a way of speaking or writing including vocabulary, syntax and pronunciation (or spelling) chosen by individuals to express themselves depending on the circumstances they speak: high register (formal occasions like parliamentary speech, official documents, celebrations), low register (informal occasions, conversations among family or friends group). There are also many in-between registers and specialized occasions like religious services, sport events, and so on. An individual may choose his dialect as a speech register for informal occasions, and a standardized language of a larger social unit on formal occasions (often called diglossia). Register: In linguistics, one of many styles or varieties of language determined by such factors as social occasion, purpose, and audience, also called stylistic variation. More generally, register is used to indicate degrees of formality in language use. The different registers or language styles that we use are sometimes called codes. According to a linguist Robert MacNeil (1989) the example of Register is; It fascinates me how differently we all speak in different circumstances. We have levels of formality, as in our clothing. There are very formal occasions, often requiring written English: the job application or the letter to the editorthe dark-suit, serious-tie language, with everything pressed and the lint brushed off. There is our less formal out-in-the-world languagea more comfortable suit, but still respectable. There is language for close friends in the evenings, on weekendsblue-jeans-and-sweat-shirt language, when it’s good to get the tie off. There is family language, even more relaxed, full of grammatical short cuts, family slang, echoes of old jokes that have become intimate shorthandthe language of pajamas and uncombed hair. Finally, there is the language with no clothes on; the talk of couplesmurmurs, sighs, gruntslanguage at its least self-conscious, open, vulnerable, and primitive. Role of Register: Its chief importance is social. It signals the kind of interaction the speaker wants, or acceptance/no acceptance of the kind of interaction expected in any situation. For instance, level of formality is a major aspect of English register. Highly formal register can signal authority, disapproval, unfriendliness. Informal register can signal various things: genuine friendliness; a fake attempt to come across as friendly; or even deliberate disrespect if the other speaker expects formal register. Choice of register can also signal social class, in areas where this is still an issue. Higher classes tend to use a more formal register in ordinary conversation. Understanding the difference between register and grammar is important, as many speakers confuse the two: particularly in thinking that only formal register is correct grammar. This can lead to major errors of register: for instance, the highly formal It is I is only correct in the most formal register, and using it under any other circumstances will make a speaker sound a pompous idiot to most speakers. Characteristics/ Features of Register: 1) Language Styles Every native speaker is normally in command of several different language styles, sometimes called registers, which are varied according to the topic under discussion, the formality of the occasion, and the medium used (speech, writing, or sign). Adapting language to suit the topic is a fairly straightforward matter. Many activities have a specialized vocabulary. If you are playing a ball game, you need to know that zero is a duck in cricket, love in tennis, and nil in soccer. If you have a drink with friends in a pub, you need to know greetings such as: Cheers! Heres to your good health! Other types of variation are less clear-cut. The same person might utter any of the following three sentences, depending on the circumstances: I should be grateful if you would make less noise. Please be quiet. Shut up! Here the utterances range from a high or formal style, down to a low or informal oneand the choice of a high or low style is partly a matter of politeness. (Jean Aitcheson, Teach You Linguistics. Hodder, 2003) 2) Participants in an Exchange Like variation in our manner of dress, stylistic variations in language cannot be judged as appropriate or not without reference to the participants in the interchange (i. e. , speaker and listener or reader and writer). For example, you would not speak to a 5-year-old child, an intimate friend, and a professor using the same style of speech. Using the term eleemosynary charitable would probably be inappropriate for the child and the friend, while using number one urinate would probably be inappropriate for the friend and the professor. (Frank Parker and Kathryn Riley, Linguistics for Non-Linguists, 3rd ed. Ellyn Bacon, 1999) 3) Register Features Register features are core lexical and grammatical characteristics found to some extent in almost all texts and registers. . . . Any linguistic feature having a functional or conventional association can be distributed in a way that distinguishes among registers. Such features come from many linguistic classes, including: phonological features (pauses, intonation patterns), tense and aspect markers, pronouns and pro-verbs, questions, nominal forms (nouns, nominalizations, gerunds), passive constructions, dependent clauses (complement clauses, relative clauses, adverbial subordination), prepositional phrases, adjectives, adverbs, measures of lexical specificity (once-occurring words, type-token ratio), lexical classes (hedges, emphatics, discourse particles, stance markers), modals, specialized verb classes (speech act verbs, mental process verbs), reduced forms (contractions, that-deletions), co-ordination, negation, and grammatical devices for structuring information (clefts, extra position). A comprehensive linguistic analysis of a register requires consideration of a representative selection of linguistic features. Analyses of these register features are necessarily quantitative, because the associated register distinctions are based on differences in the relative distribution of linguistic features. (Douglas Biber Dimensions of Register Variation: A Cross-Linguistic Comparison. Cambridge University Press, 1995) Sociolinguistics: (Wikipedia) â€Å"Sociolinguistics is the descriptive study of the effect of any and all aspects of society, including cultural norms, expectations, and context, on the way language is used, and the effects of language use on society. Sociolinguistics differs from sociology of language in that the focus of sociolinguistics is the effect of the society on the language, while the sociology of language focuses on languages effect on the society. Sociolinguistics overlaps to a considerable degree with pragmatics. It is historically closely related to linguistic anthropology and the distinction between the two fields has even been questioned recently. It also studies how language varieties differ between groups separated by certain social variables, e. g. , ethnicity, religion, status, gender, level of education, age, etc. , and how creation and adherence to these rules is used to categorize individuals in social or socioeconomic classes. As the usage of a language varies from place to place; language usage also varies among social classes, and it is these sociolect that sociolinguistics studies. †Sociolinguistics is the study of how language serves and is shaped by the social nature of human beings. In its broadest conception, sociolinguistics analyzes the many and diverse ways in which language and society entwine. This vast field of inquiry requires and combines insights from a number of disciplines, including linguistics, sociology, psychology and anthropology. Sociolinguistics examines the interplay of language and society, with language as the starting point. Variation is the key concept, applied to language itself and to its use. The basic premise of sociolinguistics is that language is variable and changing. As a result, language is not homogeneous  not for the individual user and not within or among groups of speakers who use the same language. By studying written records, sociolinguists also examine how language and society have interacted in the past. For example, they have tabulated the frequency of the singular pronoun thou and its replacement you in dated hand-written or printed documents and correlated changes in frequency with changes in class structure in 16th and 17th century England. This is historical sociolinguistics: the study of relationship between changes in society and changes in language over a period of time. Branches of sociolinguistics: Sociolinguistics can be defined broadly or narrowly Broad: branch of linguistics studying those properties of language which require reference to social, including contextual, factors in their explanation Narrow: seeks to explain patterned co-variation of language and society; seeks rules to account for that variation. Some traditions of sociolinguistic investigation: 1) Linguistic variation: (sociolinguistics proper): focuses on the linguistic variable that correlates with social differences. Unit of study is language itself considered a part of linguistics. 2) Ethnography of speaking: emphasis on various aspects of context that are involved in differing interpretations of language use. Unit of analysis is not language itself but rather the users of language: the speech community generally considered part of sociology or anthropology. 3) Language planning (also applied sociolinguistics, sociology of language): emphasis on practical aspects of this study. Much about language contact issues and language use in education.
Saturday, October 26, 2019
Case study on the Hoover Dam :: essays research papers fc
Before Hoover Dam After By- Balaji.T.K, CE02B011 CONTENTS No     Description     Page no 1.     Hoover dam –an Introduction     1 2.     Requirements posed by structural design     2 3.     Requirements posed by other details     6 4.     Type of Concrete     7 5.     Guidelines for Mix design     9 6.     Fabrication and Installation     10 7.     Formwork     11 8.     Cooling of concrete     12 9.     Temperature control of Mass Concrete     12 10.     Quality Assurance     13 11.     Bibliography     14           Hoover Dam- an Introduction! It still stands tall as an engineering marvel high above the Colorado River between Arizona and Nevada. Hoover Dam attracts over 7 million visitors from around the new world every year feeding vast tourism into the Las Vegas Nevada and Arizona economy. The building of Hoover Dam took the brilliance of over 200 engineers to pull-off what many deemed as almost impossible. And it was the fortitude of over 7,000 dam workers that endured amazingly harsh conditions and extreme dangers to complete Hoover Dam almost two years ahead of schedule The Mission of the Dam: 1.     Flooding along the Colorado River as it made its way to the Gulf of California had to be controlled. 2.     The water-flow had to be harnessed to provide much needed water to the fertile, yet arid agricultural areas of California and Arizona. 3.     Hydroelectric energy was to satisfy the requirements of millions and millions of people in adjacent regions. Some Statistics About the dimensions of the dam: Hoover Dam is 726 feet tall and 1,244 feet long. At its base, Hoover Dam is 660 feet thick which is 60 feet longer than two football fields laid end-to-end. Combined with its top thickness of 45 feet, there is enough concrete (4.5 million cubic yards) in Hoover Dam to build a two-lane highway from Seattle Washington to Miami Florida. Or imagine a four-foot wide sidewalk around Earth at its equator. A scenic by-product of Hoover Dam is the gigantic reservoir of Lake Mead, a stunningly beautiful water recreation wonderland. This boating, sailing, fishing and house-boating paradise attracts over 10 million visitors a year. Lake Mead covers 550 miles of majestic shoreline and 247 square miles of area which is twice the size of Rhode Island. Its capacity of 1 1/4 trillion cubic feet of water would cover the entire state of Pennsylvania one foot deep. Requirements for concrete posed by Structural design: The Hoover Dam is an arch dam. Arch dams transmit most of the horizontal thrust of the water stored behind them to the abutments by arch action and hence thinner cross sections are sufficient (compared to the massive cross-sections of the gravity dams). Narrow V-shaped canyons(just like the Black canyon where the Hoover dam was constructed) will be suited for locating arch dams since they can withstand the thrust produced by the arch section.
Thursday, October 24, 2019
Hum 176 Week 9
PART ONE As a local television Director, my main focus is on the local news and the issues that affect the community in which I live. I would choose to make the closing of the parks for three days my lead story and leave the celebrity death to the bigger networks. My first priority is to report news that affects the citizens of the community that I serve, even with the prospect of bigger ratings; I would feel an obligation to my audience to report issues that are more closely related to them.I would have an intense investigation on the money issues that has caused the city council to start looking at ways to save money. I would send a reporter to talk to each council person to obtain any information into the current expenditures that the city has invoked. There would be a run of the initial story set up on our local news website, which would include a blog box to obtain audience’s feedback and comments. Prior to the city council meeting, I would have run a couple of the storie s that the investigating reporters had found and announced the time and place of the city council’s meeting.This way those that are interested in attending will be well informed and those that did not know will know have the ability to participate. One reporter and crew would be assigned to give onsite coverage of the meeting, which could report breaking news on the vote and how it might affect the community. One reporter will man the website giving updated information on the voting and answering any questions that may arise from bloggers. Once the vote has been tallied, we connect with the on-scene reporter with the results.Now, the reporter on-scene will also be responsible for the follow-up story. Getting information from the city council persons on why they voted the way they did, what comments do the elected officials have in response to how they voted and why, and are there alternative ways to save money other than closing the parks? Some key questions that need to be a sked are: how will this affect the community, are there more budgets cuts coming to save money, and what are the long term effects that the community might need to be aware of?These questions play an important role for the audience and how their lives will be affected for the months to come. Giving resident’s the ability to post their comments, good or bad, on the website is also extremely important, the feedback can be used to gauge the community’s reaction to what was reported and it can serve as a forum for people’s voices being heard by the city council. The follow –up is just as important as how it all began, following other stories that are related to the park’s closing and money saving ideas by the city council need to be investigated.Any important shut downs or closures must have priority over no community based issues. We must focus on the goal of serving our community and understand that, yes, there are ratings to be made airing the popul ar stories, but if one issue slips by our attention the community will turn on our station. PART TWO For years our society has transformed from one era to another. These changes were made because of our cultures demand of better products; it also was changed with the creation of advance technology.Inventions such as the radio, television, electricity, transportation, and computers have shaped our culture into what it is today. When culture changes, so do the things our cultures like such as movies, television programs, and games. These changes are seen as an evolution for the better. Our culture has played a major role in movies and television shows along the years. War of the Worlds, which was originally broadcasted on radio in 1938; showed a time when the reports of UFO’s and aliens were on everyone’s mind.Orson Welles created it as an entertainment broadcast, which caused a panic across the country. Later, it was made into a movie and depicted the events that happen ed when people thought that the broadcast was true. Movies such as Men in Black, Signs, Predator and Aliens have played on the Orson Welles saga and shows our culture’s interest in life on other planets, which still persists today. Era movies such as Platoon, Apocalypse Now, Thin Red Line, and We Were Soldiers Once show our cultural involvement in many wars and conflicts.Television shows followed the same type of evolution. Hogan’s Heroes, X-Files, Brady Bunch, The Walton’s, and the multiple reality shows that air today all reflect the things that people have going on in their lives and how they can relate to the programs they watch. You take shows from 20 years ago and compare them to the shows today; you will find a vast difference in language, violence, sexually explicit content and gore. This is due to the change in our culture which has directed the television shows and movies to evolve to where they are today.Gaming has really evolved of the last ten years , originally created as entertainment for children, it has actually captivated all ages. Starting with simple graphics and controls, as our culture evolved, so too did the demand for better graphics, controls and more games. The first games systems I can remember was Atari and know we have Xbox, PS3 and Wii to name the top few. Going from table tennis to interactive games which can be controlled by a person’s body shows how our culture’s advancements have played a role in the gaming industry.Due to the War in Iraq, games such as Modern Warfare and Call of Duty have emerged to be some of the top games released as of late. Along with the encouragement of a healthy society Wii Fit and the Xbox Kinect have hit the spot in giving all ages the ability to play and exercise at the same time. The Wii gaming system is even being used in medical treatment to help people learn to walk again. Many people would say that games have become more violent and gruesome, thus having a nega tive effect on the youth of today. They blame gaming systems for encouraging laziness and obesity.On the other side, studies have shown that gaming systems have enhanced children’s hand-eye coordination, critical thinking skills and problem solving skills. Our culture creates a demand on better quality and new technology. Movies, television and the gaming industry will be ever changing in the hopes of creating something that our culture wants. Since the people behind producing and creating these media platforms are from our culture, it is safe to say that our culture and these media platforms will forever be linked and intertwined for years to come.
Wednesday, October 23, 2019
Joe Gransden Jazz Jam Essay
In the recent course of music, it is evident that changes and development are present. The variety of genres had expanded which led to the arrival of brand new breed of artist that is able to represent various entities and cultures. Moreover one of the genres which are developing is Jazz. For many years, different jazz musicians are present. In the current state of music, it is clear that music is flowing. Due to such realization it is needed as a researcher to see a jazz performer to fully see the development of music as well as the instrumentation of the band. More so, the researcher shall provide details to which different kinds of observation during the performance of Joe Gransden Quartet Jazz Jam. The Joe Gransden Quartet Jazz Jam is a group which is composed of different individuals who are actively performing different types of instrumentations. The most important instrument is the trumpet which is usually utilized in every song of the band. The band is greatly utilizing instruments rather than a vocal instrument. There is a satisfying sound of the base and drums and the cello which highlighted by the shallow sound by different instruments with a lighter sound. More so, the whole set which was played by the band were all complete with different instruments which add drama and emotions with the songs. Definitely the whole band is very great for they are able to present their craft and attain a response from the audience. For the band is jazz, the audience is calm and very appreciative of the music. Due to the excellence o the band, it is inevitable that the audience will be entertained and amused on how individuals could utilize music as a form of emotional and artistic perspective. On the other hand, attending such concert is similar to drinking a cold glass of water. Such kind of band is refreshing to the ears and to the soul. The music of the band and their musicality is unquestionable. Moreover, the excellence of each member in their instruments does not need any improvement. The association of each instrument is in line with each other. Upon this, the researcher sees that the Joe Gransden Quartet Jazz Jam is a unique band which does not present that jazz is a genre which is unlike any other. The presentation is highly classical in the perspective of the researcher. The instruments and the notes are learning to the classical music which is usually done in operas. More so, the instrument was playing a huge role in its own unique way. All the instruments were complementing each other. Therefore, the instruments are all highlighted in their own way. Looking at the perspective of the solo acts, it is slightly evident that each of the musicians has their own flare in providing a different style in playing the instrument. In addition to this, the lead of the band –Joe Gransden is an important player in the band. For he leads the whole group towards his visions, he is allowed the most pristine individual in the group. Although most of the musicians in the group is great in their on instruments, it is through the vision and knowledge of Joe Gransden that the group have gone to the levels and acknowledgement of the press and the audience. Moreover, the whole band was a breath of fresh air for the audiences who are interested
Tuesday, October 22, 2019
Vitamin supplements What do most Americans need essays
Vitamin supplements What do most Americans need essays Vitamin supplements: What do most Americans need? Vitamin supplements: What do most Americans need? That is the question I will be attempting to answer in the following few pages. To start, I will talk about their beginning as well as their recent growth in popularity in the past decade. I will discuss the medical views that are for and against the use of supplements, what types are most important, and what types people need. To conclude, I will tell about the supplements that I take and whether I will continue to do so. Many years ago, there existed diseases such as scurvy, rickets, and everyday colds. These illnesses were the cause of a lot of sickness and sometimes led to other illness and death. Chemists looked everywhere for a cure. Then came the first supplement to become popularized in its uses this was vitamin C. This wonder pill was said to help the body fight colds and other sickness. With the discovery and use of these new vitamins the Food and Nutrition Board convened in 1941 to determine adequate dietary intakes of essential nutrients. At this time deficiency diseases were a common public-health problem. Since that meeting, with the process of food fortification and improved diets, these diseases have been relatively uncommon except in the poor and elderly. In 1943, the first Recommended Dietary Allowances (RDAs) were published. (Skerrett, 25) These amounts were stated in what amounts were just enough to maintain good health, as that any more would just be excreted by the bo dy or build up in the tissues. Vitamin supplements have grown in popularity at a pretty constant rate since their development, but have become especially popular in recent years. The baby boomer generation that grew up on healthy diets is finding it hard to maintain that healthy lifestyle, and would rather now just pop a pill. Some experts fear that we will become dependent on these supplements and find everyone taking 50-60 di...
Monday, October 21, 2019
Globalization and International Business Essays
Globalization and International Business Essays Globalization and International Business Essay Globalization and International Business Essay 1. The broadening set of interdependent relationships among people from different parts of the world is known as ________. a. globalization b. Offshoring c. international business d. outsourcing 2. The term globalization is sometimes used to mean the ________. a. movement of jobs to low-wage countries b. business being undertaken outside the confines of any nation c. Uneven distribution of resources and their influence on different products and services in different parts of the world d. Integration of world economies through the reduction of barriers to the movement of trade, capital, technology, and people . Which of the following best defines international business? a. It includes all economic flows between two or more countries. b. It includes all private economic flows between two or more countries. c. It includes all business transactions involving two or more countries, whether the transactions are conducted by private or governmental organizations. d. It includes all business transactions in countries other than your home country 4. Which of the following is the most accurate comparison of how private organizations and governments conduct international business? a. The objectives for private organizations and governments are the same. b. The private organization’s objective is profit, whereas a government may or may not seek profit as an objective. c. Governments operate strictly for nonprofit motives, but private organizations seek profits. d. Governments undertake international business for more long-term objectives than private companies do. 5. The televising of sports competitions to viewers in multiple countries is an example of international business conducted to achieve the objective of ________. a. Acquiring resources b. Minimizing risk . Offshoring d. Sales expansion 6. An example of a U. S. merchandise import is an automobile made in ________ and sold ________. a. The United States by a Japanese company; in the United States b. The United States by a Japanese company; outside the United States c. Japan by a Japanese company: in the United States d. Japan by a U. S. company; outside the United States 7.. An example of a Japanese service export is a visit by a ________. a. Japanese citizen to Disneyland in the United States b. Japanese citizen to the Japan Pavilion at Epcot Center in the United States c. U. S. itizen to the Japan Pavilion at Epcot Center in the United States d. U. S. citizen to Tokyo Disneyland in Japan 8. A foreign direct investment occurs ________. a. Only when a company owns more than 50 percent of a foreign firm b. When a company controls a company abroad c. When foreign ownership is in private rather than government securities d. With the purchase of a foreign firm rather than the establishment of a new company abroad 9. Which of the following is an example of an international portfolio investment? a. Foreign ownership of bonds b. Ownership of patents used by a foreign company . A jointly owned foreign company d. One of a group of several foreign companies wholly owned by the same investor 10. A multinational enterprise (MNE) is one that is ________. a. among the world’s 500 lar gest companies b. owned and managed by companies whose headquarters are split among different countries c. licensed to operate by the United Nations Transnational Center d. willing to consider market and production locations anywhere in the world 11. A company starting out with a global focus, usually because of the international experience of its founders, is called a ________. . multinational enterprise b. transnational company c. strategically allied company d. born-global company 12. The fact that flower producers from Ecuador, Israel, and New Zealand all compete for sales in the same markets is due primarily to ________. a. the development of new strains of flowers that last longer b. advancements in communications c. advancements in transportation d. cross-national success in fighting insects that move internationally on plants 13. Which of the following is a reason that international business has recently grown at such a rapid pace? . the end of the political schism between t he Communist and non-Communist blocs b. stricter government policies on cross-border movements c. decreasing global competition d. None of the above 14. Which of the following is not a reason to study international business? a. Business conducted outside the confines of any one country is on the decline. b. Global events affect almost all companies. c. By approaching operating strategies from an international standpoint, you may be able to better obtain the resources you need. d. : The physical, social, and competitive conditions differ from country to country. 15. In a(n) ________culture, people tend to regard seemingly peripheral information as pertinent to decision making and infer meanings from things that people say either indirectly or casually. a. pragmatist b. idealist c. fatalistic d. high-context 16. _____ consists of specific learned norms based on attitudes, values, and beliefs of a group of people. a. Ethnology b. Civilization c. Culture d. Doctrine 17. A major problem when cultures collide in international business occurs when ________. . a company’s employees encounter distress because of difficulty in accepting or adjusting to foreign behaviors b. Employees disagree on the style of art for decorating the office c. Local people have no expectation that foreigners should adjust to their culture d. Companies understand and adjust to the national cultures in which they do business 18. A problem of using the nation as a reference point for cul ture is that ________. a. Nations fail to mediate the different interests within their boundaries b. Self-stereotypes tend to fall along national lines . Such an approach tends to be polycentric d. Variations tend to be great within a country 19. Creolization refers to ________. a. Government efforts to maintain a distinct cultural identity b. The process of mixing elements of an outside culture to a national culture c. The use of stereotypes to describe a culture d. Changes as cultures evolve over time 20. _____ peoples account for the largest percentage of global production. a. English-speaking b. Mandarin-speaking c. French-speaking d. Spanish-speaking
Sunday, October 20, 2019
Telling a Good Poem from a Bad One
Telling a Good Poem from a Bad One Telling a Good Poem from a Bad One Telling a Good Poem from a Bad One By Maeve Maddox What makes a poem good? The answer ultimately lies with the reader of the poem, but there is a certain consensus as to what makes a poem good or bad. According to the critic Coleridge, prose is words in their best order, while poetry is the best words in their best order. Poetry demands precision. The novelist can get away with less than precise expression from time to time because the story will pull the reader along. The job of the poet is to create a picture in the mind and an emotion in the heart. Every single word counts. The wrong choicea word with the wrong connotation or the wrong number of syllables or an unlovely combination of consonant soundsspoils all. The underlying thought of the poem is also important. Some poems are written to create a picture only, but the most memorable poems also convey a universal truth about the human condition. For me, a good poem leaves me with goosebumps along my arms. I think a poem is bad when it lacks a discernible point and sounds like prose. People are led to write a poem because they have been strongly moved by some event. Theyve experienced a strong emotion, received an insight, and wish to capture the experience in words. Only a few, however, succeed in turning the experience into a poem that will be meaningful to another person. On his site dedicated to examples of bad poetry, Prof. Seamus Cooney observes that most bad poetry is simply weak and ineffectual and lacking in interest. He says that memorably bad poetry is created by a poet unaware of his or her defects. He says that a really dreadful poem is the product of the right combination of lofty ambition, humorless self-confidence, and crass incompetence†¦. He collects examples of bad poems as a teaching device: For the student, having a genuine insight into the true badness of some poems is, I think, a necessary corollary of having a grasp of what makes good poems good. Heres an excerpt from one of Prof. Cooneys bad poems: Twas the year of 1869, and on the 19th of November, Which the people in Southern Germany will long remember, The great rain-storm which for twenty hours did pour down, That the rivers were overflowed and petty streams all around. from Saving a Train by William McGonagall (1825-1902) A successful poem doesnt have to rhyme or scan or have a certain pattern of lines. It does need to paint a picture with carefully chosen words. It should have a point that a reader unknown to the poet can respond to. Fortunately, poets can study a wide variety of poetrygood and badin order to learn what works and what doesnt. Some anthologies for the poet: The Oxford Book of English Verse 1250-1950 The Norton Anthology of Poetry (from Old English to Cynthia Zarin [b. 1959]) The Norton Anthology of Modern and Contemporary Poetry The Stuffed Owl: An Anthology of Bad Verse Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Freelance Writing category, check our popular posts, or choose a related post below:100 Whimsical WordsStory Writing 10120 Tips to Improve your Writing Productivity
Saturday, October 19, 2019
Personal statement Example | Topics and Well Written Essays - 1000 words
Personal Statement Example Due to my keen interest in the world of supplies, demands, distribution, revenue, profit and customer satisfaction, the field I would like to choose for my major is economics. After sensitive calculations and critical working, I took initiative to start off with my own â€Å"mini business†. I perceived it as a business that would not only be beneficial for students but would also allow me to earn a good deal of experience in the practical world alongside the profit. By assigning target goals and dividing the entire process into the stages of ‘plan’, ‘purchase’, ‘sell’ and ‘generate revenue’, I was able to keep the business simple yet effective. The plan included listing the items that were in demand and researching the availability of whole-sale vendors who could provide the required products. These items were then sold at a reasonable profit, which was later utilized for further betterment of the business. In the ‘reve nue generation’ stage of my business venture, I calculated the amount of time, energy and fuel consumption while commuting to the wholesale market and finally completing the purchase. With this data, I calculated a reasonable profit that was to be earned from the business. ... uced a new well-equipped market within the campus, while I ended the business and decided to focus on the final months of studying for my high school. From what I have learnt through my experience, I believe that I can benefit the community in better ways by further understanding the concepts of economics, which will possibly provide a solution to the world’s derailing economies. By studying subject matters such as meeting demands and supplies, converting loss into profits, benefiting human kind and sustaining global economies, I will be able to contribute to the field of economics and the community. Prompt 2 After discussions with my father that lasted for hours, I was forced to admit the fact that my twenty years of life have not really been much of a success. Before I had joined Community College, the grades that I had obtained were not up to the mark. Due to my father’s motivation and support, I had always wanted to set an example, not only for my dad but also for m y children in future. It cannot be ignored that I had gained exceptional business experience at a very young age but I realized that despite starting off as an entrepreneur and managing it well, there were many concepts I still had to grasp. I believe that the best possible way to be introduced to these concepts would be to undertake a university major in economics. At the beginning of my high-school years, I was introduced to a poem by Robert Frost, titled â€Å"And miles to go before I sleep†. This poem inspired a great sense of motivation within me and continually makes me believe that there is always a lot more that life has to offer. Since I was determined in what I believed, I took an oath to bring about a change. As I resumed my studies in the Community College, I worked hard day and night. My
Friday, October 18, 2019
Wolverhampton - A car-free city, myth or possibility Essay
Wolverhampton - A car-free city, myth or possibility - Essay Example Nowadays every effort is geared towards conserving the little resources that are available for human beings. Furthermore, efforts are made to make life easy. One of the areas that tries to conserve the environment and at the same time benefit from its own program is sustainable mobility (Ozge, & Karaaslan, 2011, p 28). This roughly means that the project aims at holding to the resources that are available in relation to the movement from one location to another. In the current world, the aspect of globalisation has led to the jeopardisation and astronomical increase in the need to use transport and has turned mobility of people, their concepts and commodities into a very important feature in our current society. At the same time, the transport segment in most of the countries has become one of the largest contributors to the carbon dioxide that the vehicles emit. This transport segment over period of time has built a great percentage on the number of pollutants contributing to the en vironmental degradation and has increased the level of energy consumption (Thomsen, 2011). It is with this in mind that I set this research on the grounds explained above. I will look at Wolverhampton concerning whether there is a possibility of turning the city into an environmental conscious city. As for this aspect of a car-free city, I will be selecting a suitable and sustainable mobility concept that can work in the city and also explain the concept itself and how it will be implemented. This will be analyzed with the relevant literal materials (Shane & Graedel, 2000, p77). The first area I will tackle in this essay will be the sustainable mobility as a concept and thereafter I will chose the most appropriate concept for sustainable mobility in the Wolverhampton area. Sustainable Mobility The word â€Å"mobile†means that one is capable of making movement in a space, virtually like in the flow of information in a particular network, be it socially (in this case, climbing the ‘social ladder’ to be in a different level or status), or even being physically making the movements (Neuman, 2011, p 41). In a statistical perspective, it means that mobility is the movement between two places, from one place to another and this does not clearly emphasize which means were used. Therefore, in my case, I will assume that mobility involves different means of transport and the mode of transport used for the movement to be made. According to Staley and Ybarra (2008), sustainable mobility is â€Å"mobility which does not endanger public health or ecosystems and meets needs for access consistent with: a) Use of renewable sources below their rates of regeneration; b) Use of non-renewable resources at below the rates of development of renewable substitutes†. The concept of mobility in some quarters has a different definition. According to Kasanen (1994) and Berge et al (1992), mobility is the potential for movement. For instance, a product might hav e a high mobility which means it might have a potential for movements by having qualities and characteristics that will make it easy to make a move and through the existence of means of transport to carry the movement out. At the same time, the mobility in people will greatly vary depending on each person’s factors like the age of the person, gender, health of the person and the occupation among many other factors. At the same time, the different periods of time at individual disposal and varied accessibility to the correct means of transport play a major part too. This is further supported by Hoyer (1999) who also describes mobility as â€Å"†¦an expression for both the potential for movement and the volume of the actual movement taking place. It
In what ways can 'childhood' and 'youth' be understood as social Essay
In what ways can 'childhood' and 'youth' be understood as social constructions - Essay Example The objective of this essay is to identify the different ways childhood and youth is because of social construction. The essay will mainly use Kehily’s book understanding youths. Kehily is one of the most popular sociologists in the world today. She has researched on many issues relating to childhood, youths, gender and sexuality. In the book Understanding Youths, she has used history and sociocultural approaches to prove that childhood is a social construction. The use of history and sociocultural approaches is important in her book since in part one, she talks about perspective. She has used past researches by other sociologists in trying to show the changes that childhood has undergone based on the time period, culture and the economic activities during the time stated. She has used Aries findings that in the 15th century, children even at the age of 5 years were free to do anything that the adults were doing (Classen, 2005, p. 171). This changed in the 16th century, where children were for economic purposes since they could work to boost the family’s income. During the industrial revolution, childhood changed since the law against child labor was introduced thus children suffered from separation with their parents. In 1950, childhood took another twist and it was the beginning of children being very dependent on their parents (Veerman, 1992, p. 58). The second part of Kehily’s book is self-identity; she has based her argument on the historical findings that childhood is different due to the social status (Kehily, 2007, p. 19). She claims that in the West; whose occupants were wealthy spoilt their children, this is different with the Western region where childhood had no meaning since their parents were poor thus they had to work. The third part of the book covers the activities and that the youths engage in thus gaining experience. She states that
Thursday, October 17, 2019
Internet Information Essay Example | Topics and Well Written Essays - 500 words
Internet Information - Essay Example This individual can select any type of content, from news, stock information, documents, applications, music and movies, among others. That is why a good number of Internet users believe that the Web should remain free and open information space equally accessible to all both retrieving and publishing information. However, as the Internet evolves, it is now increasingly being regulated by authorities because it started to hurt industries and publishers in the dissemination of the digitized products that they sell. The music, film and software industries were the hardest hit, for instance. The term Internet piracy was coined to describe the unauthorized use – sale, trade, lease, distribution, uploading for transmission, transmission or public performance of a copyrighted material. (Lieberman & Esgate 2002, p. 306) Copyright violations led a huge multi-pronged anti-piracy effort with intellectual property interests successfully lobbying governments to change laws to enhance protection and to shut down troublesome sites. Napster, a popular web application that features free file-sharing of digitized media, was forced to cease operations by these efforts. Unbridled freedom in the internet is dangerous. I underscore this due to the significance of the web technology which allows rapid and inexpensive duplication of information. Intellectual property has never been vulnerable. In Europe alone, software piracy cost businesses a whooping $3 billion due to illegal duplication and distribution. Untold number of businesses, employees, publishers, artists and writers are suffering economic losses because of this piracy. However, I have reservation whether controlling or regulating the information in the internet is the solution to the problem. This is of course besides the traditional intellectual property statutes across countries which might cover specific scenarios. I believe the answer lies
HR Policy Manual Assignment Example | Topics and Well Written Essays - 3750 words
HR Policy Manual - Assignment Example They provide automobile and hybrid-electric batteries and systems engineering. Johnson Controls vision statement is simple: to provide a more "comfortable, safe and sustainable world" (Johnson Controls Website "Vision Statement"). They are located in Glendale, WI and have another office in San Francisco. Johnson Controls is structure as a Corporation. The Equal Employment Opportunity statement tells employees and people outside the organization how the company feels about employing a diversity of people. These statements often include not only the legal definitions of diversity like race, ethnicity or disability, but they also involve statements that are important to the company like sexual orientation, amnesty, marital status or age. Each company will have a different idea of what they should put into their EEO statements. Johnson Controls is an Equal Employment Opportunity Employer. We believe that in order to be sure that our products and services are doing their jobs that we need to be a part of the community. We provide products and services that represent the diversity in the workplace. We look for people in every region who will work well as a team and who are involved in the global marketplace. We are dedicated to attracting, training and developing the best talent that we can find all over the world. Affirmative action is similar to EEO in that it tells what the business plans to do about discrimination. This statement will generally tell the groups of people that the company will cover under their anti-discrimination clause. According to Wordnet, an affirmative action policy is "a policy designed to redress past discrimination against women and minority groups through measures to improve their economic and educational opportunities". We work to eliminate discrimination and harassment in all its forms, and we are committed to providing equal opportunity in all of our employment practices. By valuing diversity, all our employees can fully
Wednesday, October 16, 2019
Internet Information Essay Example | Topics and Well Written Essays - 500 words
Internet Information - Essay Example This individual can select any type of content, from news, stock information, documents, applications, music and movies, among others. That is why a good number of Internet users believe that the Web should remain free and open information space equally accessible to all both retrieving and publishing information. However, as the Internet evolves, it is now increasingly being regulated by authorities because it started to hurt industries and publishers in the dissemination of the digitized products that they sell. The music, film and software industries were the hardest hit, for instance. The term Internet piracy was coined to describe the unauthorized use – sale, trade, lease, distribution, uploading for transmission, transmission or public performance of a copyrighted material. (Lieberman & Esgate 2002, p. 306) Copyright violations led a huge multi-pronged anti-piracy effort with intellectual property interests successfully lobbying governments to change laws to enhance protection and to shut down troublesome sites. Napster, a popular web application that features free file-sharing of digitized media, was forced to cease operations by these efforts. Unbridled freedom in the internet is dangerous. I underscore this due to the significance of the web technology which allows rapid and inexpensive duplication of information. Intellectual property has never been vulnerable. In Europe alone, software piracy cost businesses a whooping $3 billion due to illegal duplication and distribution. Untold number of businesses, employees, publishers, artists and writers are suffering economic losses because of this piracy. However, I have reservation whether controlling or regulating the information in the internet is the solution to the problem. This is of course besides the traditional intellectual property statutes across countries which might cover specific scenarios. I believe the answer lies
Tuesday, October 15, 2019
Research Paper Essay Example | Topics and Well Written Essays - 2000 words
Research Paper - Essay Example To understand how these processes can be automated and what steps should be taken in order to increase the organizational efficiency, we need to understand the business processes and the key performance indicators that affect the organizational efficiency. The key performance indicators for the organization are listed below: Pricing: The interest rates fluctuate rapidly and the organization should quote newer rates whenever they are updated. These quotes are then quoted to the customer of the organization: mortgage brokers and real estate agents. Accommodating these quick changes and updating quotes is painstaking with current manual system of making an excel file (with pre-build calculations) and then printing and faxing them to the customers. Management of Interest Rate Locks: Interest Rates are to be booked or locked by the customer for the loan they are borrowing. Customer normally follows the interest rates market before making a decision to borrow or not. They may order a loan when the interest rate is the lowest; therefore, those bookings are very spontaneous and sudden in nature but needs to be accommodated. The locking is generated through an Information System but the records are stored and distributed to the borrower manually. Broker Relationship Management: The record of each broker’s performance is recorded in Excel files. ... Proposed changes for Information Technology Infrastructure After considering all the requirements and the modus operandi of the business, following changes are proposed: Implementation of a financial and accounting ERP that would record all the customer’s financial transactions in a centralized manner. This ERP will work in parallel with the Loan Origination software Implementation of a data warehouse that will be further aided with a reporting Business Intelligence Tool Implementation of a CRM that will provide all statistics about the customer Implementation of advanced Information Security mechanisms such as Honeypots and intrusions detection systems Improvements in current social marketing and networking mechanisms Case for ERP A financial small – scale ERP is a dire requirement for the organization since the loan origination software is not a complete package and cannot record transactions in totality. An ERP will be centralized software that will integrate operati ons of all the four branches namely Annapolis, Columbia, Towson and downtown Baltimore. In the initial phase, financial and accounting modules will be implemented that can be followed by other modules, if required. This ERP will use the same SQL Server 2005 database that is used for Loan Origination Application. At the start, the plan is to do pilot testing and use these implemented modules with the Loan Origination Application. For testing purposes, we will take a backup of this database and use it with the ERP. After the unit tests are successful we will use the live database with the ERP. The ERP will be a centralized application catering to all the four branches (more branches can
Monday, October 14, 2019
The Utilitarianism approach Essay Example for Free
The Utilitarianism approach Essay 1. What do Act Utilitarianism believes? How do their beliefs differ from those of Rule Utilitarianism? According to Aggabao (2013), act utilitarianism (AU) capture that people must implement that deed that well bring about the greatest benefit for all people who concerned. Act utilitarianism believes that each situation is different from other situations. On other word each situation is unique and non-repeatable. So each individual has to try to avoid about the greatest number of good consequences for greatest number of people in specific situation and time. For example, teachers, who try and make their best to avoid their students with a greatest amount of their knowledge, are moral and act utilitarianists. This behavior from those teachers will lead to the greatest good consequences. Students will be able to answer their papers very well without any help from any sources (of course in specific time which is the semester and in specific situation which is the effort of teachers to teach students.). The differences between AU and RU are coming from what their beliefs involved. Act Utilitarianism (AU) believes that each situation is different. In contrast, rule utilitarianism (RU) believes that is people should reside and chase that the rule, of the place where they live, that will lead to great benefits for all concerned. For example, everyone should follow the traffic laws. If everybody follow these rules, that will bring about the greatest good consequences for greatest number of people. Act Utilitarianism requires simple rational thinking because the situations are different naturally, while Rule Utilitarianism requires rational, reasonable, and complex thinking from individual to establish between the rules. While RU control the generating greatest good, in AU greatest good are achieved automatically as a consequence of the actions.
Sunday, October 13, 2019
Design Of A PV-Diesel Hybrid System
Design Of A PV-Diesel Hybrid System Design Of A PV-Diesel Hybrid System And Its Comparison With Grid Connected System In Pakistan 1. Project Background And Introduction Introduction The project with respect to this thesis is to design a PV Diesel hybrid system and to compare it with already existed grid connected system. This system is designed for a Jamia Masjid (Islamic center) in Pakpattan, Pakistan. The exact site of the project is a colony of Pakpattan which is in the south-west of the city Pakpattan. The Pakpattan city is situated around 161 Km south west to Lahore. The climate and weather data is almost same for Lahore and Pakpattan. Furthermore it will be first project of its own nature in this area and it will help to design the systems for the residential areas by which a common person can get benefits and get rid of power failures. Pakistan is located between latitude 24 and 37 degrees North and longitude 62 and 75 degrees East. Pakistan has Afghanistan in the north-west, Iran on west boarder, India is on the east, China in the north and the Arabian Sea is on the south. Pakistan is ageographical centre of the Asian Continent because it builds a type of bridge between Far East and Middle East; also it has a continental type of climate which can be characterized by extreme variations of temperature. Generally the climate of Pakistan is arid, means very high temperature in summer and low temperatures in winter. High altitudes change the climate in the freezing northern mountains which are covered with snow. There is little rainfall. There are some differences exist distinctly in various locations, e.g. the coastal line along Arabian Sea is usually under warm conditions, whereas the Karakoram mountain range and some other mountains of far north are so cold, completely frozen and covered with snow that these are only visible and accessible by some international world-class climbers for a couple of months of May and June of each year. The variation of daily temperature could be 11 0C to 17 0C but in winters the minimum mean temperature is about 4 0C in January. Pakistan has tremendous recourses of energy but unfortunately due to mismanagement out of 170 million population just 65-70% has access to electricity. Demand is more than supply of energy to residential and industrial sector. Currently Pakistan is facing 3000 MW of power storage and it is expected that in year 2010 the demand will exceed supply by 5500 MW. The current power and electricity demand and supply gap shows that there is a big need to increases the current power generation capacity in Pakistan. Aim Of The Thesis The main aim of the project is to explain the design phase of a single home PV system. The procedures and details of the design are presented with step by step. There are main following aims which are supposed to be fulfilled by this thesis. a) To go through and grab the core knowledge of the designing process. b) To get familiar with different tools used for designing and make selection between them. c) Beyond from bookish knowledge, get to know some real and practical aspects of different PV systems and projects. The body and structure of the thesis is mainly divided into four phases. a) Calculation of the primary load for this specific project with the help of PVSYST version 4 b) Division of the load to PV and Diesel Generator according to boundary conditions and design parameters. c) Economical and technical look on already existed grid connected system. d) Comparative study between this newly design system and already existed grid connected system in terms of economics, availability and life time World Energy Situation There are different factors which effect and play an important role in the consumption, demand and availability of energy, for example the consumption by individual user and business is being increased, everyday growing population and new government policies are some of these factors. But the fossil fuels are exhaustible. There are two aspects of the fossil fuels, 1st is their availability and 2nd is those harmful environmental impacts which appear after using and burning of these fossil fuels. It is equally harmful for the present generations as well as for future generations. But with the passage of time more and more people and governments are getting awareness about these impacts. The current energy demand projections can be seen from the facts and figures provided by World Energy Administration (EIA) â€Å"The total world energy consumption increases from 472 quadrillion Btu in 2006 to 552 quadrillion Btu in 2015 and 678 quadrillion Btu in 2030â€â€a total increase of 44 percent over the projection period†Renewable Energy Situation Of The World When the first Renewable Global Status Report was published in 2004, many indicators have shown dramatic gains. In the last four years from the end of 2004 to the end of 2008, solar photovoltaic capacity increased six times which is more than 16 gigawatts (GW). Wind power capacity has been increased 250 percent to 121 GW; the total power capacity from new renewable recourses has been increased 75 percent to 280 GW which includes significant gains in small geothermal, hydro, and biomass power generation. During the same period of time, solar heating capacity become double to 145 gigawatts-thermal, while the biodiesel production has been also increased six times to 12 billion liters per year and ethanol production doubled to 67 billion liters per year. The annual percentage gain for the year 2008 was also very amazing and more dramatic. The growth in Wind energy was 29% and grid connected solar PV by 70%. The capacity of utility scale PV plants also increased during this period. Solar hot water systems also grew by 15%. All around the world the governments are changing the policies about the future energy crises and energy markets and policy. In this race the United States of America became the leader and invested $24 billion for new capacity which is 20% of the total global investment. The United States is also leading in adding the total wind energy capacity and also surpassed Germany who was a wind power leader for a long time. Spain has added around 2.6 GW of solar PV, which is a full half of grid connected installations all around the global and five times increase over Spains 2007 additions. China has doubled its capacity to produce wind energy and now ranked at fourth place all around the world. Another significant and important milestone was that the European Union and the USA added more capacity to produce power from renewable recourses than from conventional energy sources (as gas, oil, coal and nuclear) and it happened for the first time. The industries of Renewable energy boomed mostly during 2008. Global solar PV production was increased by 90% to 6.9 GW in 2008. Energy Profile Of Pakistan The energy profile of Pakistan is inadequate and there are always short falls of energy (electricity) especially during summer. Pakistan needs around 14,000 to 15,000 MW electricity everyday to meet all residential and industrial demands. But Pakistan can produce around 11,500 MW, so it means there is around 3000 MW to 4000 MW short fall. This shortfall was experienced extensively and on its peak this year and affecting industry, commerce and daily life. During this year the shortfall for electricity in rural areas was around 12 to 16 hours and in urban areas it was about 8 to 12 hours. The reasons for this deficiency are limited fossil fuel resources, weak economy and mismanagement of the available energy sources. There are some commercial sources of energy available in Pakistan, they are: Hydro energy; Nuclear energy; Oil and gas; Conventional fuels like agricultural wastes, animal dung and wood fuel. Here, it is an overview of primary energy supplies in Pakistan in MTOE (TOE: ton of oil equivalent. It is an energy unit which is equal to the energy of burning of 1 ton of crude oil which is about 42 GJ) From fig 1.3 it is clear that energy supply of Pakistan is highly dependent on Oil and Gas. Both Oil and Gas contribute more than 79% of total primary energy supplied. The other sources of energy like hydro- electricity, coal, nuclear electricity and imported electricity contribute about 21% of the total share. As energy is essential for all types of production processes. Pakistan has been growing in agricultural and industrial sector during last decade and thats why energy demand is being increased. As population and industry is growing, the daily demand will increase up to 20,000 MW in 2010. Pakistan meets around 75% of its energy needs by oil, gas and hydro electricity production. Natural gas has played an important role to meet the energy needs in recent years. But Pakistan needs to expand its energy resource on permanent bases. In order to overcome this energy shortage, Pakistan needs to expand and develop its indigenous energy resources such as hydropower, wind and solar energy. Pakistan is one of the highest solar insulation areas of the world. Now we will briefly discuss the main energy sources in Pakistan. Natural Gas After the independence of Pakistan in 1952 Sui natural gas field resources in Baluchistan were discovered first time. The production at Sui started in 1955 and was on its peak in 1985. It was the most productive gas field of Pakistan in early 1990s. In FY 1993 it was accounting 46% of production. After that the second largest gas field was discovered which is also located in Baluchistan at Mari, which was contributing 20% of all production. Total 25 gas fields were fully operational in FY 1993. The estimation of recoverable natural gas reserves were estimated around 662.0 billion cubic meters, with an extraction rate around 14.0 billion cubic meters. In order to meet the increasing demand of energy and for future planning, efforts from government are being made to increase the production of gas in the country. To do this exploration activities are the first step. The estimation of recoverable reserves of natural gas was 29.671 trillion cubic feet in January 2009. During July-March 2008-2009 the average production of natural gas was 3986.5 mmcfd (million cubic feet per day) but during the corresponding period of last year it was around 3965.9 mmcfd which shows an increase of around 0.52%. At the moment 26 public and private sector companies are engaged in exploration and production activities of oil and gas in Pakistan. LPG The contribution of LPG (Liquefied Petroleum Gas) is about 0.7% to the total energy supply of Pakistan. LPG is being supplied to many remote areas where the supply of natural gas is not technically suitable. To do this government has changed policies for energy supply and management and as a result of this modification the supply of LPG in 2007-2008 was 601,592 Metric Ton and in last few years the annual cumulative growth rate was 18.2%.years. Around 32,621 MT of LPG was imported during July-March, 2009. CNG The main reason of encouragement of Compressed Natural Gas (CNG) use is to improve environment and to decrease the dependency on other fuels. The price difference between petrol and CNG is about 60.0 percent, thats why vehicles are being converted to CNG day by day and around 2.0 Million vehicles are using CNG. The numbers of CNG stations are also increasing day by day and there are around 2,700 established CNG stations in Pakistan which covers an investment of Rs.70 billion. At present Pakistan is the largest CNG user country. Oil The estimation of recoverable reserves of crude oil in total in Pakistan were around 313 million barrels in January 2009. The average production of crude oil during July-March 2008-09 was 66532 barrels per day. The average production of crude oil during last year was 70166 barrels per day which shows a negative growth of 5.2 percent. The average production of oil in Pakistan remained 67,438 BOPD in 2006-2007. Oil and gas development company and limited (OGDCL) was the biggest oil producing company in Pakistan with a production of around 13.261 million barrels which contribute around 54% of the total oil production per year of Pakistan with an average rate of 36,332 BOPD. After that British Petroleum (BP) is the second largest oil producing company with total contribution of 16% of total oil production in Pakistan. BP produces around 4.025 million barrels averagely with 11,029 BOPD. Pakistan oil fields limited (POL) produced around 3.231 million barrels. There are other small oil production companies as well in Pakistan. Coal The total estimation of coal recourses of Pakistan is more than 185 billion tones. Thar coalfield (Sindh province) is the biggest coal source which worth more than 175 billion tones. Pakistans coal is generally ranked from lignite to sub bituminous. The production of coal was decreased in during July-March 2008-09 by 28.8%. About 60.4% of the total coal production is being consumed by the brick kilns industry. Cement industry is also using a large fraction of coal which is around 37.4% and almost all cement industry is being switched on coal from furnace oil. As energy demand is increasing day by day and government is reshaping the energy policies. Due to high prices of imported energy government of Pakistan has decided to increase the share of coal from 05 to 19% in the overall energy mix up to 2030. In view of expected shortfall of energy resources and electricity during the next 10 years the maximum utilization of coal would be needed for power generation and gasification. Accordi ng to government energy security plan, a target has been set which is to generate about 20,000 MW power from coal by 2030 and 50% by 2050. Nuclear Energy: Pakistan is the 7th nuclear power of the world. In 2009, the nuclear power plants contribute up to 2.4% share to the total electricity production in Pakistan. Pakistan has two working nuclear reactors which produce about 425 MW power for the generation of electricity. The third nuclear reactor will be operational in spring of 2010. In Pakistan nuclear power contributes very small to the electricity production. The total generating capacity is around 20 GWe while in 2006; 98 billion kWh gross was generated. First nuclear power reactor was started in 1971 in KANUPP near Karachi and it has small capacity of 125 MWe and it is pressurized heavy water reactor (PHWR). The second unit was started in May 2000 and is known as Chashma-1 in Punjab. It has capacity of 325 MWe. It is pressurized water reactor (PWR) and was supplied by Chinas CNNC under safeguards. It is also known as CHASNUPP-1. In December 2005 construction of its twin Chashma-2 was started. It is reported that it cost PKR 51.46 billion (US$ 860 million, $350 million were financed by China). But these sources are not sufficient to overcome this energy crises and Pakistan needs to develop renewable energy sources. Renewable Energy Sources In Pakistan Pakistan is situated in such a special geographic location that it is blessed with abundant and inexhaustible Renewable Energy (RE) resources. These resources can play an effective and considerable role for the contribution towards energy security of Pakistan. When we look into current world energy scenario in general and energy scenario of Pakistan in particular, the development and adoption of RE technologies makes better sense. Government policies and objectives to develop RE technology are also matching with this sense so that the share of RE in overall energy mix should be at least 5% by the year 2030. Wind potential: 0. 346 Million MW Solar potential: 2.9 Million MW Mini Small Hydel: 2,000 MW [9] There is a significant potential of wind energy in Pakistan especially in the coastal belt of Baluchistan and Sindh, and also in the desert areas of Punjab and Sindh. However this renewable energy source has not been utilized. AEDB collected the wind data of all Pakistan from Pakistan Metrological Department and was analyzed. On the basis of this collected data and analysis, it was stated that the coastal belt of Pakistan has a God gifted 60 km wide (Gharo-Keti Bandar) and 180 km long (up to Hyderabad) wind corridor. This wind corridor has the potential to generate 50,000 MW of electricity. AEDB has done other different surveys in Gharo and Jhimpir regions and some coastal area of Baluchistan. After these surveys it is concluded that in the south region most of the remote villages can be easily electrified through micro wind turbines. Furthermore it is estimated that in Baluchistan Sindh and Northern areas more than 5000 villages can be electrified through wind energy. Sincere efforts and aggressive lobbying has been done by AEDB with national and international investors to invest and to make them realize the tremendous potentials of RE. AEBD is in negotiations with international companies to set up their business in Pakistan. However large wind mills have not been installed yet but 30 wind mills for water pumping have been installed on experimental basis in different parts of Baluchistan and Sindh. In southern coastal areas of Pakistan remote villages are currently electrified with energy and so far more than 17 villages have been electrified using micro wind turbines. Around 95% of total electricity generation is from hydropower in Pakistan. But during summer in hottest and driest months of the year it becomes less productive and cannot meet the energy demands. Also, around 70% of the population lives in 50,000 villages. Many of these villages are very far from the main transmission lines and also it is not economically viable to connect these small villages to the main grid due to their small population. On the other hand solar energy has excellent and significant potential. Pakistan is one of those countries which receive solar radiations at high level throughout the year. Every day it receives an average of about 19 MJ/m2 of solar energy. Studies have been already done and solar systems have been developed and tested. There is a list of different projects which are completed by Pakistan council of Renewable energy technology. Potential Of PV In Pakistan The location of Pakistan is very ideal to take advantage of solar energy as a source of energy because Pakistan is in the Sun Belt region. Solar energy is available abundantly and widely distributed all around the country. Following figure shows solar insolation map for Pakistan. The map shows around 200-250 W/m2 per day. The Baluchistan province is very rich in solar energy. It receives around 19-20 MJ/m2 per day averagely which is equal to 1.93-2.03 MWh/ m2 per day with annual 8-8.5 mean annual sunshine hours. These conditions are ideal for PV and solar energy applications. Solar energy is very good option for off-grid villages. There are around 75,000 off-grid villages which contains 4 million homes and every home accommodates around 4-5 people. These off-grid villages are situated in the Baluchistan and Frontier Province. AEDB has set a target to electrify a thousand villages via solar technology by the year 2010. In this respect the first contract has been given to the Sehgal electronics group (Pakistan). Each home which is electrified with PV will have around 400 W power supply and lead acid batteries for overnight storage. There are also other plans to have local production using PV modules with and estimation of this production is around 3MW/year. Possible Routes For Solar PV In Pakistan The global demand of PV equipment is increasing day by day and due to this fact the prices for PV systems, equipment and electricity has gone down remarkably. PV could be exploited in Pakistan through following two routes. Off-grid Or Stand-Alone Sector Stand-alone systems generate electricity independently of the utility grid. Stand alone systems can be a very good option for the remote areas and very deep located villages, where the extension of power transmission lines would be more costly. Also it could be implemented in environmentally sensitive areas as parks, remote homes and cabins. In rural areas, it could be used for solar water pumps and farm lighting. [12] Grid-Connected Sector Grid-connected PV systems supply extra power when the home systems power supply is not sufficient to fulfill the load. These systems remove the need of battery bank. In some situation, utilities allow net metering, by which the owner can sell extra power back to the utility. Current Solar Energy Applications In Pakistan Both PV and solar thermal have a wide range of applications in Pakistan. Although the scale of utilization and adoption has been very small but it has been utilized for last 25 years in Pakistan. Different applications mainly PV and solar thermal applications are summarized as. Photovoltaics Eighteen PV stations were built by the government in the early 1980s to electrify different villages the country. The installed capacity was nearly 440 kW but due to the lack of technical knowledge and follow up, these systems could not perform as required. Currently in Pakistan solar energy is being used for telephone exchanges stand alone rural electrification, cathodic protection, highway emergency telephones and vaccine refrigeration in hospitals. In different parts of Baluchistan, about 20 solar water pumps have been installed for drinking purposes by The Public Health Department. The northern and western area of Pakistan are mostly hilly and mountain areas (Hindu Kush-Himalayas, HKH region), which are blessed with a lot of sunshine with 4-6 kWh/m2 daily average solar radiation. Seven solar stations were installed in this region in the late 1980s for lighting by different companies. The total capacity of these systems was 234 kW. They are not in operation now due maintenance pro blems. SIEMENS Pakistan has installed many stand alone solar systems in Pakistan. On the Lahore-Islamabad Motorway, it has installed power supply systems for many microwave-link repeater stations and more than 350 emergency call boxes. Solar Thermal Applications There are many applications which utilize solar energy directly by utilizing its heat characteristics. Such applications are much simple, low cost and easy to adopt. The applications include heating and cooling of homes and buildings, cooking, water heating for domestic and industrial use and drying agricultural products. A brief description of such applications in Pakistan is given here. Solar Water Heaters This technology is quite mature in Pakistan but very limited because of its higher capital cost as compared to conventional water heaters which operate on natural gas. But in last couple of years it has started to gain popularity because a number of public sector organizations are working to develop low cost solar water heaters. The prices of natural gas and electricity are increasing day by day, so people are adopting solar water heaters and also private sector has already started the production of such heaters. Solar Cooker Different public sector organizations have been working to develop low cost and efficient design solar cookers. In HKH region of Pakistan, more than 2000 solar cookers are in use. This number is very small. It needs to be more popularized. Pakistan needs to reduce the use of precious forest resources as fuel wood and to replace it with solar cookers. Solar Dryers Solar energy can be very good option for drying agriculture products. By this, we can get very good quality products at much less cost. Northern mountainous areas like Gilgit and Sakardu are very rich in fruit production like apricots which used to be wasted by tons every year. But now solar dryers are being used to dry large quantities of fruit, which is leaving a positive effect on the economy of this area. Different NGOs are working for the popularizing and the use of such dryers. Solar Desalination Drinkable water is unavailable in many parts of Sindh, Baluchistan and southern Punjab and it is very critical issue. Underground water is available but it is highly saline. This saline water is not fit for drinking at all and causes many dangerous diseases such as hypertension. Solar energy can be utilized to convert this available saline water into drinkable water. Solar desalination is very simple, low cost and easy to use. Also it is very easy to adopt. A successful solar desalination project is in operation and it is working very fine and helping to change the life style of the population of Gawader in the Baluchistan province. It consists of 240 stills and each can clean 6000 gallons of seawater per day. 2. Basics And Components Of A PV System Basics Of A PV System Photovoltaic is the technology which converts solar energy directly into electricity and this process is carried out though solar cells. Solar cell is a device which converts sun energy into electricity. We can say solar cell as photovoltaic cell as well but solar cell term will be used when the source of light is defined as â€Å"sun†but if it is not defined than we can say it as photovoltaic cell. Now days when entire world is looking for a neat and clean environment and want to meet huge energy requirements without disturbing and populating the environment, sustainable energy sources seems to play their important role. Researchers and scientists from all around the world are looking for these types of renewable sources. They are trying to get the energy needs from these renewable energy sources. The main advantages of using renewable energy sources are 1. Neat and clean environment 2. Yield of energy is higher 3. Safer for electricity production as compared to convention methods (low voltage) 4. Long life times 5. Low maintenance cost 6. Use of natural sources which are being wasted with time. These are the reason, why people prefer renewable energy sources. There are different types of renewable energy sources as 1. Solar energy 2. Wind energy 3. Tidal energy 4. Geothermal energy 5. Wave power 6. Hydropower 7. Bio energy We will discuss solar energy in detail and its related topics in this report. There are different units in a PV system and all these units combine to make a full working PV system. These are PV System Components 1. PV Panels 2. Trackers and tracking system 3. Array DC Disconnect 4. Blocking diodes 5. Charge Controller 6. Battery Bank 7. System Meter 8. Main DC Disconnect 9. Inverter 10. Kilowatt-Hour Meter 11. Backup Generator PV Panels PV panels are the defining components of a PV system, which uses sunlight to make direct current (DC) electricity. Wafers of semiconductor material are used for this purpose. They use light (photons) to produce electricity (photovoltaic effect). When the electricity is generated than it powers our electric loads such as lights, computers, and refrigerators. PV panels differ from each other on the basis of power rating in watts which is based on their maximum power generation capacity. Solar cell is the fundamental and basic building block in a PV system which acts as power conversion unit of this system. There are different types of solar cells now days available having different power about 1 or 2 watts. Usually solar cells are made of single crystal silicon and they are limited to about 25% efficiency. The reason is that they are most sensitive to IRL (infrared light), and the radiations in this region of electromagnetic spectrum are relatively low in energy. Another type of solar cells is Polycrystalline solar cells. They are made by a special casting process. In this process molten silicon is being poured into a mould, allowed to cool down and then it is sliced into wafers. By this process we can make relatively cheaper cells as compared to single crystal cells, but their efficiency is less than 20%. The reason is that there is internal resistance on the boundaries of silicon crystals which affects the efficiency. The third type of solar cells is amorphous cells and they are made by a special process in which silicon is deposited onto a glass substrate from a reactive gas such as silane (SiH4). These types of solar cells are used in solar powered watches and calculators, but now days bigger modules are also manufactured. They are also rather cheap and their efficiency is only up to 10%. The reason is, since amorphous silicon cell has no crystal structure and there are much internal energy losses. Solar cells are not just restricted to semiconductor materials; solar cells are available now days which convert sun light into electricity by organic molecules. Their efficiency is up to 10%. Apart from various types of silicon, other materials can also be used to make solar cells like cadmium telluride and gallium arsenide. There are different types of cell packings. The most common are raw cells, and they are often with cover sheet. Now we have discussed solar cells. These solar are combined together to make a module to get boosted power for practical purposes. Than these modules are combined together to make a panel, these panels are joined together to form a big array. Trackers And Tracking System Solar tracker is a device on which solar panels are fitted and the motion of the sun is tracked through this device. It ensures that the maximum amount of sunlight will strike to the panel throughout the whole day. Actually it is a mounting rack which follows the sun constantly. By using trackers, we can utilize maximum sunlight and thus can produce more electricity. In the morning time, it is low on eastern horizon while at the sunset it is low at western horizon. But at noon the position of sun is very high in the sky. This motion is due to the rotation of earth. Trackers keep PV modules perpendicular to incoming sun radiations and maximize the energy production. The increment in the energy production using trackers depends on the site and the type of tracker. Usually energy production increases 25 to 40% annually, which is shown in more detail in the following figure. To get maximum efficiency tracker must be placed in a suitable location. A good tracker site is that on which sun can be seen very early in the morning time and receive sunlight until sunset. There should be no solar obstructions like trees and buildings on the site or near the site in order to work perfectly. Before considering the tracker into system design, an evaluation of the site is done using Solar Pathfinder. Trackers are usually mounted on ground and use a heavy steel pole which is sunk into a concrete foundation. There are some systems where the trackers are mounted on the roofs, but it can create structural problems. There are two basic types of trackers. 1. Electrically operated 2. Thermally operated Thermally Operated Trackers These trackers are based on mass transfer from one side to the other side of the tracker to track the sun. This transfer of mass causes the tracker to turn from east to west by following the sun. Actually two tubes filled with Freon (which vaporizes and become gas) are mounted on east and west sides of the tracker. With the sunlight, the temperature of Freon becomes higher on one side of tracker, it starts to become vapors. These vapors take more space than as compared to the liquid Freon, which pushes Freon (liquid) to the other side. This transfer of mass from the one side to the other side of the tracker causes the change in the balance of tracker which eventually rotates it to the west. Usually they are slow Design Of A PV-Diesel Hybrid System Design Of A PV-Diesel Hybrid System Design Of A PV-Diesel Hybrid System And Its Comparison With Grid Connected System In Pakistan 1. Project Background And Introduction Introduction The project with respect to this thesis is to design a PV Diesel hybrid system and to compare it with already existed grid connected system. This system is designed for a Jamia Masjid (Islamic center) in Pakpattan, Pakistan. The exact site of the project is a colony of Pakpattan which is in the south-west of the city Pakpattan. The Pakpattan city is situated around 161 Km south west to Lahore. The climate and weather data is almost same for Lahore and Pakpattan. Furthermore it will be first project of its own nature in this area and it will help to design the systems for the residential areas by which a common person can get benefits and get rid of power failures. Pakistan is located between latitude 24 and 37 degrees North and longitude 62 and 75 degrees East. Pakistan has Afghanistan in the north-west, Iran on west boarder, India is on the east, China in the north and the Arabian Sea is on the south. Pakistan is ageographical centre of the Asian Continent because it builds a type of bridge between Far East and Middle East; also it has a continental type of climate which can be characterized by extreme variations of temperature. Generally the climate of Pakistan is arid, means very high temperature in summer and low temperatures in winter. High altitudes change the climate in the freezing northern mountains which are covered with snow. There is little rainfall. There are some differences exist distinctly in various locations, e.g. the coastal line along Arabian Sea is usually under warm conditions, whereas the Karakoram mountain range and some other mountains of far north are so cold, completely frozen and covered with snow that these are only visible and accessible by some international world-class climbers for a couple of months of May and June of each year. The variation of daily temperature could be 11 0C to 17 0C but in winters the minimum mean temperature is about 4 0C in January. Pakistan has tremendous recourses of energy but unfortunately due to mismanagement out of 170 million population just 65-70% has access to electricity. Demand is more than supply of energy to residential and industrial sector. Currently Pakistan is facing 3000 MW of power storage and it is expected that in year 2010 the demand will exceed supply by 5500 MW. The current power and electricity demand and supply gap shows that there is a big need to increases the current power generation capacity in Pakistan. Aim Of The Thesis The main aim of the project is to explain the design phase of a single home PV system. The procedures and details of the design are presented with step by step. There are main following aims which are supposed to be fulfilled by this thesis. a) To go through and grab the core knowledge of the designing process. b) To get familiar with different tools used for designing and make selection between them. c) Beyond from bookish knowledge, get to know some real and practical aspects of different PV systems and projects. The body and structure of the thesis is mainly divided into four phases. a) Calculation of the primary load for this specific project with the help of PVSYST version 4 b) Division of the load to PV and Diesel Generator according to boundary conditions and design parameters. c) Economical and technical look on already existed grid connected system. d) Comparative study between this newly design system and already existed grid connected system in terms of economics, availability and life time World Energy Situation There are different factors which effect and play an important role in the consumption, demand and availability of energy, for example the consumption by individual user and business is being increased, everyday growing population and new government policies are some of these factors. But the fossil fuels are exhaustible. There are two aspects of the fossil fuels, 1st is their availability and 2nd is those harmful environmental impacts which appear after using and burning of these fossil fuels. It is equally harmful for the present generations as well as for future generations. But with the passage of time more and more people and governments are getting awareness about these impacts. The current energy demand projections can be seen from the facts and figures provided by World Energy Administration (EIA) â€Å"The total world energy consumption increases from 472 quadrillion Btu in 2006 to 552 quadrillion Btu in 2015 and 678 quadrillion Btu in 2030â€â€a total increase of 44 percent over the projection period†Renewable Energy Situation Of The World When the first Renewable Global Status Report was published in 2004, many indicators have shown dramatic gains. In the last four years from the end of 2004 to the end of 2008, solar photovoltaic capacity increased six times which is more than 16 gigawatts (GW). Wind power capacity has been increased 250 percent to 121 GW; the total power capacity from new renewable recourses has been increased 75 percent to 280 GW which includes significant gains in small geothermal, hydro, and biomass power generation. During the same period of time, solar heating capacity become double to 145 gigawatts-thermal, while the biodiesel production has been also increased six times to 12 billion liters per year and ethanol production doubled to 67 billion liters per year. The annual percentage gain for the year 2008 was also very amazing and more dramatic. The growth in Wind energy was 29% and grid connected solar PV by 70%. The capacity of utility scale PV plants also increased during this period. Solar hot water systems also grew by 15%. All around the world the governments are changing the policies about the future energy crises and energy markets and policy. In this race the United States of America became the leader and invested $24 billion for new capacity which is 20% of the total global investment. The United States is also leading in adding the total wind energy capacity and also surpassed Germany who was a wind power leader for a long time. Spain has added around 2.6 GW of solar PV, which is a full half of grid connected installations all around the global and five times increase over Spains 2007 additions. China has doubled its capacity to produce wind energy and now ranked at fourth place all around the world. Another significant and important milestone was that the European Union and the USA added more capacity to produce power from renewable recourses than from conventional energy sources (as gas, oil, coal and nuclear) and it happened for the first time. The industries of Renewable energy boomed mostly during 2008. Global solar PV production was increased by 90% to 6.9 GW in 2008. Energy Profile Of Pakistan The energy profile of Pakistan is inadequate and there are always short falls of energy (electricity) especially during summer. Pakistan needs around 14,000 to 15,000 MW electricity everyday to meet all residential and industrial demands. But Pakistan can produce around 11,500 MW, so it means there is around 3000 MW to 4000 MW short fall. This shortfall was experienced extensively and on its peak this year and affecting industry, commerce and daily life. During this year the shortfall for electricity in rural areas was around 12 to 16 hours and in urban areas it was about 8 to 12 hours. The reasons for this deficiency are limited fossil fuel resources, weak economy and mismanagement of the available energy sources. There are some commercial sources of energy available in Pakistan, they are: Hydro energy; Nuclear energy; Oil and gas; Conventional fuels like agricultural wastes, animal dung and wood fuel. Here, it is an overview of primary energy supplies in Pakistan in MTOE (TOE: ton of oil equivalent. It is an energy unit which is equal to the energy of burning of 1 ton of crude oil which is about 42 GJ) From fig 1.3 it is clear that energy supply of Pakistan is highly dependent on Oil and Gas. Both Oil and Gas contribute more than 79% of total primary energy supplied. The other sources of energy like hydro- electricity, coal, nuclear electricity and imported electricity contribute about 21% of the total share. As energy is essential for all types of production processes. Pakistan has been growing in agricultural and industrial sector during last decade and thats why energy demand is being increased. As population and industry is growing, the daily demand will increase up to 20,000 MW in 2010. Pakistan meets around 75% of its energy needs by oil, gas and hydro electricity production. Natural gas has played an important role to meet the energy needs in recent years. But Pakistan needs to expand its energy resource on permanent bases. In order to overcome this energy shortage, Pakistan needs to expand and develop its indigenous energy resources such as hydropower, wind and solar energy. Pakistan is one of the highest solar insulation areas of the world. Now we will briefly discuss the main energy sources in Pakistan. Natural Gas After the independence of Pakistan in 1952 Sui natural gas field resources in Baluchistan were discovered first time. The production at Sui started in 1955 and was on its peak in 1985. It was the most productive gas field of Pakistan in early 1990s. In FY 1993 it was accounting 46% of production. After that the second largest gas field was discovered which is also located in Baluchistan at Mari, which was contributing 20% of all production. Total 25 gas fields were fully operational in FY 1993. The estimation of recoverable natural gas reserves were estimated around 662.0 billion cubic meters, with an extraction rate around 14.0 billion cubic meters. In order to meet the increasing demand of energy and for future planning, efforts from government are being made to increase the production of gas in the country. To do this exploration activities are the first step. The estimation of recoverable reserves of natural gas was 29.671 trillion cubic feet in January 2009. During July-March 2008-2009 the average production of natural gas was 3986.5 mmcfd (million cubic feet per day) but during the corresponding period of last year it was around 3965.9 mmcfd which shows an increase of around 0.52%. At the moment 26 public and private sector companies are engaged in exploration and production activities of oil and gas in Pakistan. LPG The contribution of LPG (Liquefied Petroleum Gas) is about 0.7% to the total energy supply of Pakistan. LPG is being supplied to many remote areas where the supply of natural gas is not technically suitable. To do this government has changed policies for energy supply and management and as a result of this modification the supply of LPG in 2007-2008 was 601,592 Metric Ton and in last few years the annual cumulative growth rate was 18.2%.years. Around 32,621 MT of LPG was imported during July-March, 2009. CNG The main reason of encouragement of Compressed Natural Gas (CNG) use is to improve environment and to decrease the dependency on other fuels. The price difference between petrol and CNG is about 60.0 percent, thats why vehicles are being converted to CNG day by day and around 2.0 Million vehicles are using CNG. The numbers of CNG stations are also increasing day by day and there are around 2,700 established CNG stations in Pakistan which covers an investment of Rs.70 billion. At present Pakistan is the largest CNG user country. Oil The estimation of recoverable reserves of crude oil in total in Pakistan were around 313 million barrels in January 2009. The average production of crude oil during July-March 2008-09 was 66532 barrels per day. The average production of crude oil during last year was 70166 barrels per day which shows a negative growth of 5.2 percent. The average production of oil in Pakistan remained 67,438 BOPD in 2006-2007. Oil and gas development company and limited (OGDCL) was the biggest oil producing company in Pakistan with a production of around 13.261 million barrels which contribute around 54% of the total oil production per year of Pakistan with an average rate of 36,332 BOPD. After that British Petroleum (BP) is the second largest oil producing company with total contribution of 16% of total oil production in Pakistan. BP produces around 4.025 million barrels averagely with 11,029 BOPD. Pakistan oil fields limited (POL) produced around 3.231 million barrels. There are other small oil production companies as well in Pakistan. Coal The total estimation of coal recourses of Pakistan is more than 185 billion tones. Thar coalfield (Sindh province) is the biggest coal source which worth more than 175 billion tones. Pakistans coal is generally ranked from lignite to sub bituminous. The production of coal was decreased in during July-March 2008-09 by 28.8%. About 60.4% of the total coal production is being consumed by the brick kilns industry. Cement industry is also using a large fraction of coal which is around 37.4% and almost all cement industry is being switched on coal from furnace oil. As energy demand is increasing day by day and government is reshaping the energy policies. Due to high prices of imported energy government of Pakistan has decided to increase the share of coal from 05 to 19% in the overall energy mix up to 2030. In view of expected shortfall of energy resources and electricity during the next 10 years the maximum utilization of coal would be needed for power generation and gasification. Accordi ng to government energy security plan, a target has been set which is to generate about 20,000 MW power from coal by 2030 and 50% by 2050. Nuclear Energy: Pakistan is the 7th nuclear power of the world. In 2009, the nuclear power plants contribute up to 2.4% share to the total electricity production in Pakistan. Pakistan has two working nuclear reactors which produce about 425 MW power for the generation of electricity. The third nuclear reactor will be operational in spring of 2010. In Pakistan nuclear power contributes very small to the electricity production. The total generating capacity is around 20 GWe while in 2006; 98 billion kWh gross was generated. First nuclear power reactor was started in 1971 in KANUPP near Karachi and it has small capacity of 125 MWe and it is pressurized heavy water reactor (PHWR). The second unit was started in May 2000 and is known as Chashma-1 in Punjab. It has capacity of 325 MWe. It is pressurized water reactor (PWR) and was supplied by Chinas CNNC under safeguards. It is also known as CHASNUPP-1. In December 2005 construction of its twin Chashma-2 was started. It is reported that it cost PKR 51.46 billion (US$ 860 million, $350 million were financed by China). But these sources are not sufficient to overcome this energy crises and Pakistan needs to develop renewable energy sources. Renewable Energy Sources In Pakistan Pakistan is situated in such a special geographic location that it is blessed with abundant and inexhaustible Renewable Energy (RE) resources. These resources can play an effective and considerable role for the contribution towards energy security of Pakistan. When we look into current world energy scenario in general and energy scenario of Pakistan in particular, the development and adoption of RE technologies makes better sense. Government policies and objectives to develop RE technology are also matching with this sense so that the share of RE in overall energy mix should be at least 5% by the year 2030. Wind potential: 0. 346 Million MW Solar potential: 2.9 Million MW Mini Small Hydel: 2,000 MW [9] There is a significant potential of wind energy in Pakistan especially in the coastal belt of Baluchistan and Sindh, and also in the desert areas of Punjab and Sindh. However this renewable energy source has not been utilized. AEDB collected the wind data of all Pakistan from Pakistan Metrological Department and was analyzed. On the basis of this collected data and analysis, it was stated that the coastal belt of Pakistan has a God gifted 60 km wide (Gharo-Keti Bandar) and 180 km long (up to Hyderabad) wind corridor. This wind corridor has the potential to generate 50,000 MW of electricity. AEDB has done other different surveys in Gharo and Jhimpir regions and some coastal area of Baluchistan. After these surveys it is concluded that in the south region most of the remote villages can be easily electrified through micro wind turbines. Furthermore it is estimated that in Baluchistan Sindh and Northern areas more than 5000 villages can be electrified through wind energy. Sincere efforts and aggressive lobbying has been done by AEDB with national and international investors to invest and to make them realize the tremendous potentials of RE. AEBD is in negotiations with international companies to set up their business in Pakistan. However large wind mills have not been installed yet but 30 wind mills for water pumping have been installed on experimental basis in different parts of Baluchistan and Sindh. In southern coastal areas of Pakistan remote villages are currently electrified with energy and so far more than 17 villages have been electrified using micro wind turbines. Around 95% of total electricity generation is from hydropower in Pakistan. But during summer in hottest and driest months of the year it becomes less productive and cannot meet the energy demands. Also, around 70% of the population lives in 50,000 villages. Many of these villages are very far from the main transmission lines and also it is not economically viable to connect these small villages to the main grid due to their small population. On the other hand solar energy has excellent and significant potential. Pakistan is one of those countries which receive solar radiations at high level throughout the year. Every day it receives an average of about 19 MJ/m2 of solar energy. Studies have been already done and solar systems have been developed and tested. There is a list of different projects which are completed by Pakistan council of Renewable energy technology. Potential Of PV In Pakistan The location of Pakistan is very ideal to take advantage of solar energy as a source of energy because Pakistan is in the Sun Belt region. Solar energy is available abundantly and widely distributed all around the country. Following figure shows solar insolation map for Pakistan. The map shows around 200-250 W/m2 per day. The Baluchistan province is very rich in solar energy. It receives around 19-20 MJ/m2 per day averagely which is equal to 1.93-2.03 MWh/ m2 per day with annual 8-8.5 mean annual sunshine hours. These conditions are ideal for PV and solar energy applications. Solar energy is very good option for off-grid villages. There are around 75,000 off-grid villages which contains 4 million homes and every home accommodates around 4-5 people. These off-grid villages are situated in the Baluchistan and Frontier Province. AEDB has set a target to electrify a thousand villages via solar technology by the year 2010. In this respect the first contract has been given to the Sehgal electronics group (Pakistan). Each home which is electrified with PV will have around 400 W power supply and lead acid batteries for overnight storage. There are also other plans to have local production using PV modules with and estimation of this production is around 3MW/year. Possible Routes For Solar PV In Pakistan The global demand of PV equipment is increasing day by day and due to this fact the prices for PV systems, equipment and electricity has gone down remarkably. PV could be exploited in Pakistan through following two routes. Off-grid Or Stand-Alone Sector Stand-alone systems generate electricity independently of the utility grid. Stand alone systems can be a very good option for the remote areas and very deep located villages, where the extension of power transmission lines would be more costly. Also it could be implemented in environmentally sensitive areas as parks, remote homes and cabins. In rural areas, it could be used for solar water pumps and farm lighting. [12] Grid-Connected Sector Grid-connected PV systems supply extra power when the home systems power supply is not sufficient to fulfill the load. These systems remove the need of battery bank. In some situation, utilities allow net metering, by which the owner can sell extra power back to the utility. Current Solar Energy Applications In Pakistan Both PV and solar thermal have a wide range of applications in Pakistan. Although the scale of utilization and adoption has been very small but it has been utilized for last 25 years in Pakistan. Different applications mainly PV and solar thermal applications are summarized as. Photovoltaics Eighteen PV stations were built by the government in the early 1980s to electrify different villages the country. The installed capacity was nearly 440 kW but due to the lack of technical knowledge and follow up, these systems could not perform as required. Currently in Pakistan solar energy is being used for telephone exchanges stand alone rural electrification, cathodic protection, highway emergency telephones and vaccine refrigeration in hospitals. In different parts of Baluchistan, about 20 solar water pumps have been installed for drinking purposes by The Public Health Department. The northern and western area of Pakistan are mostly hilly and mountain areas (Hindu Kush-Himalayas, HKH region), which are blessed with a lot of sunshine with 4-6 kWh/m2 daily average solar radiation. Seven solar stations were installed in this region in the late 1980s for lighting by different companies. The total capacity of these systems was 234 kW. They are not in operation now due maintenance pro blems. SIEMENS Pakistan has installed many stand alone solar systems in Pakistan. On the Lahore-Islamabad Motorway, it has installed power supply systems for many microwave-link repeater stations and more than 350 emergency call boxes. Solar Thermal Applications There are many applications which utilize solar energy directly by utilizing its heat characteristics. Such applications are much simple, low cost and easy to adopt. The applications include heating and cooling of homes and buildings, cooking, water heating for domestic and industrial use and drying agricultural products. A brief description of such applications in Pakistan is given here. Solar Water Heaters This technology is quite mature in Pakistan but very limited because of its higher capital cost as compared to conventional water heaters which operate on natural gas. But in last couple of years it has started to gain popularity because a number of public sector organizations are working to develop low cost solar water heaters. The prices of natural gas and electricity are increasing day by day, so people are adopting solar water heaters and also private sector has already started the production of such heaters. Solar Cooker Different public sector organizations have been working to develop low cost and efficient design solar cookers. In HKH region of Pakistan, more than 2000 solar cookers are in use. This number is very small. It needs to be more popularized. Pakistan needs to reduce the use of precious forest resources as fuel wood and to replace it with solar cookers. Solar Dryers Solar energy can be very good option for drying agriculture products. By this, we can get very good quality products at much less cost. Northern mountainous areas like Gilgit and Sakardu are very rich in fruit production like apricots which used to be wasted by tons every year. But now solar dryers are being used to dry large quantities of fruit, which is leaving a positive effect on the economy of this area. Different NGOs are working for the popularizing and the use of such dryers. Solar Desalination Drinkable water is unavailable in many parts of Sindh, Baluchistan and southern Punjab and it is very critical issue. Underground water is available but it is highly saline. This saline water is not fit for drinking at all and causes many dangerous diseases such as hypertension. Solar energy can be utilized to convert this available saline water into drinkable water. Solar desalination is very simple, low cost and easy to use. Also it is very easy to adopt. A successful solar desalination project is in operation and it is working very fine and helping to change the life style of the population of Gawader in the Baluchistan province. It consists of 240 stills and each can clean 6000 gallons of seawater per day. 2. Basics And Components Of A PV System Basics Of A PV System Photovoltaic is the technology which converts solar energy directly into electricity and this process is carried out though solar cells. Solar cell is a device which converts sun energy into electricity. We can say solar cell as photovoltaic cell as well but solar cell term will be used when the source of light is defined as â€Å"sun†but if it is not defined than we can say it as photovoltaic cell. Now days when entire world is looking for a neat and clean environment and want to meet huge energy requirements without disturbing and populating the environment, sustainable energy sources seems to play their important role. Researchers and scientists from all around the world are looking for these types of renewable sources. They are trying to get the energy needs from these renewable energy sources. The main advantages of using renewable energy sources are 1. Neat and clean environment 2. Yield of energy is higher 3. Safer for electricity production as compared to convention methods (low voltage) 4. Long life times 5. Low maintenance cost 6. Use of natural sources which are being wasted with time. These are the reason, why people prefer renewable energy sources. There are different types of renewable energy sources as 1. Solar energy 2. Wind energy 3. Tidal energy 4. Geothermal energy 5. Wave power 6. Hydropower 7. Bio energy We will discuss solar energy in detail and its related topics in this report. There are different units in a PV system and all these units combine to make a full working PV system. These are PV System Components 1. PV Panels 2. Trackers and tracking system 3. Array DC Disconnect 4. Blocking diodes 5. Charge Controller 6. Battery Bank 7. System Meter 8. Main DC Disconnect 9. Inverter 10. Kilowatt-Hour Meter 11. Backup Generator PV Panels PV panels are the defining components of a PV system, which uses sunlight to make direct current (DC) electricity. Wafers of semiconductor material are used for this purpose. They use light (photons) to produce electricity (photovoltaic effect). When the electricity is generated than it powers our electric loads such as lights, computers, and refrigerators. PV panels differ from each other on the basis of power rating in watts which is based on their maximum power generation capacity. Solar cell is the fundamental and basic building block in a PV system which acts as power conversion unit of this system. There are different types of solar cells now days available having different power about 1 or 2 watts. Usually solar cells are made of single crystal silicon and they are limited to about 25% efficiency. The reason is that they are most sensitive to IRL (infrared light), and the radiations in this region of electromagnetic spectrum are relatively low in energy. Another type of solar cells is Polycrystalline solar cells. They are made by a special casting process. In this process molten silicon is being poured into a mould, allowed to cool down and then it is sliced into wafers. By this process we can make relatively cheaper cells as compared to single crystal cells, but their efficiency is less than 20%. The reason is that there is internal resistance on the boundaries of silicon crystals which affects the efficiency. The third type of solar cells is amorphous cells and they are made by a special process in which silicon is deposited onto a glass substrate from a reactive gas such as silane (SiH4). These types of solar cells are used in solar powered watches and calculators, but now days bigger modules are also manufactured. They are also rather cheap and their efficiency is only up to 10%. The reason is, since amorphous silicon cell has no crystal structure and there are much internal energy losses. Solar cells are not just restricted to semiconductor materials; solar cells are available now days which convert sun light into electricity by organic molecules. Their efficiency is up to 10%. Apart from various types of silicon, other materials can also be used to make solar cells like cadmium telluride and gallium arsenide. There are different types of cell packings. The most common are raw cells, and they are often with cover sheet. Now we have discussed solar cells. These solar are combined together to make a module to get boosted power for practical purposes. Than these modules are combined together to make a panel, these panels are joined together to form a big array. Trackers And Tracking System Solar tracker is a device on which solar panels are fitted and the motion of the sun is tracked through this device. It ensures that the maximum amount of sunlight will strike to the panel throughout the whole day. Actually it is a mounting rack which follows the sun constantly. By using trackers, we can utilize maximum sunlight and thus can produce more electricity. In the morning time, it is low on eastern horizon while at the sunset it is low at western horizon. But at noon the position of sun is very high in the sky. This motion is due to the rotation of earth. Trackers keep PV modules perpendicular to incoming sun radiations and maximize the energy production. The increment in the energy production using trackers depends on the site and the type of tracker. Usually energy production increases 25 to 40% annually, which is shown in more detail in the following figure. To get maximum efficiency tracker must be placed in a suitable location. A good tracker site is that on which sun can be seen very early in the morning time and receive sunlight until sunset. There should be no solar obstructions like trees and buildings on the site or near the site in order to work perfectly. Before considering the tracker into system design, an evaluation of the site is done using Solar Pathfinder. Trackers are usually mounted on ground and use a heavy steel pole which is sunk into a concrete foundation. There are some systems where the trackers are mounted on the roofs, but it can create structural problems. There are two basic types of trackers. 1. Electrically operated 2. Thermally operated Thermally Operated Trackers These trackers are based on mass transfer from one side to the other side of the tracker to track the sun. This transfer of mass causes the tracker to turn from east to west by following the sun. Actually two tubes filled with Freon (which vaporizes and become gas) are mounted on east and west sides of the tracker. With the sunlight, the temperature of Freon becomes higher on one side of tracker, it starts to become vapors. These vapors take more space than as compared to the liquid Freon, which pushes Freon (liquid) to the other side. This transfer of mass from the one side to the other side of the tracker causes the change in the balance of tracker which eventually rotates it to the west. Usually they are slow
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