Monday, December 30, 2019
Regency Gentlemen Amusements Essay - 715 Words
Regency Gentlemen Amusements The Regency Era, generally referring to the time period of 1800-1820, was undeniably a time of pleasure seeking and over-indulgence. The Regency era represented a time when the current ruler, mad King George III, was incapable of performing his royal duties. Due to his madness, the Kingââ¬â¢s son the Prince of Wales, a Regent and heir to the throne, was appointed to govern. The Prince of Wales was designated Regent in 1811 (Channel4). During this era people of the upper class had a great deal of leisure time, and their major task seemed to be to entertain themselves. Some of the more popular amusements of rich and fashionable Regency gentlemen were boxing, cockfighting, andâ⬠¦show more contentâ⬠¦The competition was not finished until one man lay unconscious, and this often took hours (channel 4). Despite the popularity of boxing, cockfighting was still considered to be the periodââ¬â¢s most widespread sport. Cockfighting ranged across all social classes. Tournaments were held between gentlemen, often geographically based with one area playing another. The cockpits were a common place where all social classes gathered to place bets and watch the match. Although even the smallest town had a cockpit, Regency gentlemen were known to hold contests at their own estate. This pastime was a common practice and even influenced furniture makers to offer cockfighting chairs (GI). Unlike bare-knuckle bouts between people, cocks were precisely paired by weight in all the more heavily staked cockfights. Human training was elementary when compared to the training of gamecock. The cocks often had bone or metal spurs strapped over the birds beak to insure a fight to the death. Cockfighting began to diminish in England only after The Royal Society for Cruelty to Animals began to bring actions in the late 1830s, based on an 1835 Act against animal cruelty (GI). With boxing and cockfightingââ¬â¢s growing interest, both created an obsession with gambling. Gambling amongst theShow MoreRelatedHow Does Jane Austen Create Negative Feelings Towards Mr. Darcy in the First Few Chapters of Pride and Prejudice?2674 Words à |à 11 PagesHow does Jane Austen create negative feelings towards Mr. Darcy in the first few chapters of Pride and Prejudice? Jane Austen wrote her book about life for women in the nineteenth century; the Regency period. For women in this period, life was very unbalanced, women were not perceived as equals and men were superior and had full authority in every aspect of life. There was a clear segregation among men and women and the values they were expected to maintain. It is a truth universally acknowledged
Sunday, December 22, 2019
Lgbt History And The Modern Era - 1737 Words
There are many topics prevalent shown throughout history. History books in todayââ¬â¢s society highlight the majority of groups of people and historical events. This essay will prove that there is a problematic issue where LGBT lives and existences are being erased throughout history and the modern era. Throughout, it will be explained how these groups of people are being underrepresented within history, major wars, and the modern era. History covers a very broad spectrum of time, with recorded history going as far back as five thousand years. Yet, within this period of five thousand years, history books implemented in school systems rarely give detail to LGBT people (Carter, ââ¬Å"Itââ¬â¢s Time to Write LGBT History into the Textbooksâ⬠). For example, within America, homosexuality has been shown throughout Native American tribes long before Europeans even stepped foot onto the land. While traditional European beliefs define a personââ¬â¢s sexual identity male or female based on biological determination, Native Americanââ¬â¢s have a vast variety of how sexuality is viewed. Native Americans believed the Creator created three different genders; males, females and two-spirits, following the Plato model of roles. Gender roles and gender identity mirrored one another, each containing their own magical attributes according to lore. While gender identity defined Native American gender roles, their expectati ons for the two spirits differed. Native American ideology welcomed a third gender and openlyShow MoreRelatedThe Controversy Of The 1969 Stonewall Riots919 Words à |à 4 PagesRiots upon the struggle for LGBT+ rights. This potential monograph, entitled ââ¬Å"Riots for Rights: the Debatable Influence of Stonewall,â⬠pursues to furthermore enhance the argument concerning whether the 1969 Stonewall Riots began the public LGBT+ movement for further rights, or if the converse occurred, wherein this momentous protest instead the culminated the LGBT+ efforts of the previous years, merely pushing it further into public discussion. In the modern era, LGBT+ rights still undergo fierceRead MoreA Review Of Gaming s Lgbt Representation1115 Words à |à 5 PagesA Review of Gamingââ¬â¢s LGBT Representation ââ¬Å"In Qunandar, Krem would be an Aqun-Athlok. Thatââ¬â¢s what we call someone born one gender but living like another,â⬠says The Iron Bull. ââ¬Å"And Qunari donââ¬â¢t treat those Aqun people any differently than a real man?â⬠Krem asks. ââ¬Å"They are real men. Just like you are.â⬠The Iron Bull finishes. Above is a conversation between two characters in Biowareââ¬â¢s 2014 smash hit RPG, Dragon Age Inquisition. This conversation took the transgendered community by storm. Krem, second-in-commandRead MoreGay Fathers And Their Children1300 Words à |à 6 Pagesof lesbian, gay, bisexual, and transgender (LGBT) families in mainstream media, exemplified by the long-running sitcom Modern Family, and the 2015 United States Supreme Courtââ¬â¢s ruling in favor of same-sex marriage, may lead some to believe LGBT families are a recent phenomenon. Daniel Winunwe Riversââ¬â¢ Radical Relations: Lesbian Mothers, Gay Fathers, and Their Children in the United States since World War II brilliantly uncovers the previously untold history of same-sex families. Riversââ¬â¢ main thesisRead MoreThe Issue Of Gay Marriage1241 Words à |à 5 PagesAs the months pass by, the lesbian, gay, bisexual, and transgender (LGBT) community is getting tired of the same arguments in court. They as well as many other Americans are waiting for an answer. Although the solution to this public crises is to let them have their rights, many opposing people classify their arguments as correct or valid. However clear the answer may be, it has yet to be confirmed by all the states in America. Some major factors that lead to this conflict is whether homosexualityRead More`` Rapunzel `` : The Feminist Revitalization Of Fairy Tales1420 Words à |à 6 Pages Like all fairytales, Rapunzel has a history that extends far earlier than the 1800s when it first transcribed by brothers Jacob and Wilhelm Grimm. However, Rapunzel is a tale that continues to be re-written and re-interpreted even today. From the 1970s with the feminist revitalization of fairy tales to the earl y 2010s with Disneyââ¬â¢s Tangled (2010), this timeless tale continues to engage its listeners. In 2015, Katie Kapurch of Texas State University revisited Rapunzel with an eye on its more recentRead MoreFreedom Of Speech And Moral Rights2018 Words à |à 9 Pagesportray Allah in a negative light, the rationale of portraying a superior being as a human is considered disrespectful to whichever religious affiliation regardless of the superior being involved. This is the case in the context of comedy in the modern era. In hindsight, comedy is based on controversial and/or negative elements. This suggests comedy must discredit one facet of life to generate comical relief to the listener, which may promote cases of racial stereotypes, societal bias, and even genderRead MoreFairy Tales By Anne Sexton1422 Words à |à 6 PagesLike all fairy tales, Rapunzel has a history that extends far earlier than the 1800s when it was first transcribed by brothers Jacob and Wilhelm Grimm. However, Rapunzel is a tale that continues to be re-written and re-interpreted even today. From the 1970s with the feminist revitalization of fairy tales to the early 2010s with Disneyââ¬â¢s Tangled (2010), this timeless tale continues to engage its listeners. In 2015, Katie Kapurch of Texas State University revisited Rapunzel with an eye on its moreRead MoreThe Broad World Of American Theatre1691 Words à |à 7 Pagesevolved significantly to incorporate and present ideas unique to the era in which the plays were produced. To understand the development of contemporary gay cinema, one must first recognize the true definition of LGBTQ theatre. Critic Joe Jeffreys states that ââ¬Å"plays with central characters that are LGBT[Q] or deal in a substantial fashion with themes or issues of same-sex sexuality or transgenderism may safely be considered LGBT[Q] plays or theaterâ⬠(Jeffreys 1). The definition can further be extendedRead MoreEssay On Londonwood765 Words à |à 4 PagesThere are many wonderful reasons to visit England: its lush, green landscapes, its rich history and, of course, the landmarks of London. But, first and foremost, England is part of the island of Great Britain, which means it is filled with beautiful, authentic seaside towns just waiting to be discovered. Whether a traveler is seeking breathtaking views, fresh local seafood or a frothy pint of beer at a charming village pub, the English coast has it all. Here are eight towns along the English coastRead MoreWhy Are Black American Men Against Homosexuality?1313 Words à |à 6 Pagesaspect of black Christian Americans. ââ¬Å"Indeed, black clerics who fit the persona of someone willing to demonize LGBTS and were already in sync with the self-righteous white evangelical extremists could be counted on to use their religious influence to persuade their congregants and other members of the black community to go along with the strategy of social exclusion and sexual bias against LGBTs. Eventually, dissenters would emerge from the black political and religious leadership (Stanford 39).â⬠This
Saturday, December 14, 2019
The involvement of Northern NGOs with the developing countries Free Essays
In this research paper we look at the involvement of Northern NGOs with the developing countries. They are prime donors of most developing countries programs which are geared towards alleviating the welfare of the masses such as improve health and living condition. Local NGOs have been involved as intermediaries between government and the people. We will write a custom essay sample on The involvement of Northern NGOs with the developing countries or any similar topic only for you Order Now The northern NGOs serve their specific agenda and mandate contrary to what the poor rural urban expect. NORTHERN NGOS Northern NGOs represented international organizations who are donors to developing countries that are are donors such as World Bank and private agencies. Their relation with the south makes it the subject of this research paper. The relationship with governments and nongovernmental organization with them plays a critical role in understanding their mandates and objectives in helping the population in the rural and urban regions. The urban and rural populace has diverse needs ranging from health, unemployment, education, poverty and access to other services. In this respect governments have been unable to provide these services to their community in an effective and wider coverage manner. For instance, in South Africa, 30 % of the population are unemployed and for the 20% of the poorest households, 53% ere unemployed (Adato Haddad 2001, p.1). It is also reported that there is need for job creation in all regions inhabited by the poorest households i.e. urban, metropolitan and rural. Based on these facts the governments of countries in the developing world have focused their programs to alleviate these problems e.g. the welfare of the masses, improve living condition, health and service provision (Li 2005). The programs have achieved different success margins and limitations. Most of government programs are constrained in reaching the people because of bureaucracy, authoritarian rule and high cost of implementation. Since most of the programs are financed by international community (Northern NGOs) and governments. For instance, in Indonesia the World Bank has developed social development programs to help them achieve their mandate and objectives. In order to do these, they have used analysis of the needs of the regions to come up with the plan. Due to constraints in working with the government directly they have supported and strengthened the local NGOs and civil society organizations (CSOs) to advance their objectives (Li 2005). The rationale use includes improving transparency in village planning level, conflict resolution and step sponsorship of NGOs. However NGOs have their own limitations such as the leaders use as a vehicle for reformation of social and political life. The World Bank has used neo-liberal system to ensure ââ¬Ëgood governanceââ¬â¢ by instituting a competitive process based on administrative and decentralized structures (Li 2005). More so in order for the region to be eligible for support from World Bank it had to proof that it is pro-poor and is supervised by the World Bank team. According to Arya (1999) he explains the role in which NGOs have worked with their government under the funding of donors (government agencies, private agencies and governments). The common objectives for the collaboration include; access to technical resources, gain legitimacy or recognition from the people, obtain appropriate solution and developmental problems, enhance peopleââ¬â¢s participation and provideà better accountability, transparency and public reform system (Aryaà 1999). Donors view NGOs as intermediaries or transitory to government links to people and use them to as instruments of improved service delivery and outreach to the government. The donors see their task as completed when NGOs are involved in the project programs with the government. Most private donors do not support or supervise the selection criterion even when there is resistance from the government. However, they can play a key role in establishing mechanism to bring NGOs so that they have a beneficial effect on service delivery, participation and decentralization (Arya 1999). Northern NGOs for the past decade have increased funding to southern NGOs with due to limitation effectiveness of delivery, reforms, cost efficiency, sustainability and participation from the government. DeGabriele (2002), when studying about improvement of community based management projects. He previewed the World Health Organization commitment to provide access to safe and clean water. But from the experiences gathered two challenges emerged; water accessibility could not be achieved with the rate of population growth and the intended improvements to health were not realized within 1980 ââ¬â 1990 decade. This becomes the redefinition of the concept of community management within water sector. It was realized that water accessibility could only be achieved with participatory role implemented (DeGabriele 2002). AED (1998) elaborates on the participatory approach used to i.e. the participatory learning and Action approach which involves communities to analyze their needs, identify possible solutions and develop, implement and evaluate the plan of action. In contrast NGOs can have negative implication to the poor because they can use them to legitimize their existence, solicit funds and raise their profile for the disadvantage of the poor. Changes in their positive attitude will go way to bring positive results (AED 1998, Kaiser 2000, p. 6). CONCLUSION Northern NGOs play critical role in financing development programs to developing countries. They have been involved directly or indirectly with government depending on the nature and intensity of the resources used and the origin of the donor. Most private agencies finance the local NGOs who are viewed as intermediaries or transitory link between the government and people. The donors have used them to enhance their agenda and mandate to ensure good governance of project- programs they agree with the government. REFERENCE Adato, M.; Haddad, L, 2001, Poverty targets, community-based public works programs: a cross-disciplinary assessment in South Africa, International Food Policy Research Institute (IFPRI). Available from: http://www.ifpri.org/divs/fcnd/dp/papers/fcndp121.pdf [8 April 2008] AED, 1998, Empowering communities: participatory techniques for community-based programme development, Academy for Educational Development, Washington DC, Available from: http://pcs.aed.org/empowering.htm [8April 2008] Arya, V, 1999, Towards a relationship of significance: lessons from a decade of collaboration between government and NGOs in Rajasthan, India, à Agricultural Research and Extension Network (AgREN), Available from: http://www.odi.org.uk/agren/papers/agrenpaper_97.pdf [8April 2008] DeGabriele, J, 2002, Improving community based management of boreholesâ⬠a case study from Malawi Land Tenure Centre, University of Wisconsin-Madison, Available from http://www2.irc.nl/manage/debate/malawi.html [8April 2008] Kaiser, T, 2000, Participatory beneficiary-based approaches in evaluation of humanitarian programmes, Evaluation and Policy Analysis Unit (EPAU), UNHCR, Available from : http://www.unhcr.org/research/RESEARCH/3c7527f91.pdf [8April 2008] Li, T, 2005, The government through community; the World Bank in Indonesia, University of Toronto, Available from: http://www.law.nyu.edu/kingsburyb/fall05/globalization/Li_paper.pdf [8April 2008] How to cite The involvement of Northern NGOs with the developing countries, Essay examples
Friday, December 6, 2019
Few Miles Above Tintern Abbey free essay sample
This is one of the most important ideas of Tintern Abbey. The speaker of this poem has discovered, in his maturity, that his appreciation of natural beauty has allowed him to recognize a divine power in nature. Wordsworth comes up with this idea in Tintern Abbey, and then really explores and develops it. Nature means several things in the context of this poem: it can mean 1) physical nature, or 2) it can mean the sense of unity or connection between everything, or 3) it can refer to a divine presence in Nature, like Mother Nature. Memory and the Past Memorys a funny thing in the world of Tintern Abbey. It works like a portable scrapbook of all of your most amazing experiences with Nature. Having a bad day? Close your eyes and flip to page 44 of your mental scrapbook to call up the image of that visit to the banks of the river Wye! Youll feel better in a jiffy. Part of the process of maturing into the kind of person who can sense the divine presence in nature is knowing when and how to access your memory. Awe and Amazement In Tintern Abbey, the speakers reaction to nature is one of awe. He finds the view from the banks of the river Wye to be jaw-dropping-ly, breathtakingly, almost indescribably beautiful. His breath, at one point, is actually taken away. And once he has his epiphany about the divine presence in all of nature, his awe is turned to a kind of piety. He becomes a devout worshipper of Mother Nature. Transformation Tintern Abbey is a nature poem, and nature is always full of transformations: fruit ripens, seasons change you get the picture. The poem describes the transformation between the young, boyish William and the more mature speaker of the poem; it also imagines the future transformation that will change the present Dorothy (Wordsworths sister) into someone who will have the speakers deep appreciation for Nature. The Beneficial Influence of Nature Throughout Wordsworthââ¬â¢s work, nature provides the ultimate good influence on the human mind. All manifestations of the natural worldââ¬âfrom the highest mountain to the simplest flowerââ¬âelicit noble, elevated thoughts and passionate emotions in the people who observe these manifestations. Wordsworth repeatedly emphasizes the importance of nature to an individualââ¬â¢s intellectual and spiritual development. A good relationship with nature helps individuals connect to both the spiritual and the social worlds. As Wordsworth explains in The Prelude, a love of nature can lead to a love of humankind. In such poems as ââ¬Å"The World Is Too Much with Usâ⬠(1807) and ââ¬Å"London, 1802â⬠(1807) people become selfish and immoral when they distance themselves from nature by living in cities. Humanityââ¬â¢s innate empathy and nobility of spirit becomes corrupted by artificial social conventions as well as by the squalor of city life. In contrast, people who spend a lot of time in nature, such as laborers and farmers, retain the purity and nobility of their souls. The Power of the Human Mind Wordsworth praised the power of the human mind. Using memory and imagination, individuals could overcome difficulty and pain. For instance, the speaker in ââ¬Å"Lines Composed a Few Miles Above Tintern Abbeyâ⬠(1798) relieves his loneliness with memories of nature, while the leech gatherer in ââ¬Å"Resolution and Independenceâ⬠(1807) perseveres cheerfully in the face of poverty by the exertion of his own will. The transformative powers of the mind are available to all, regardless of an individualââ¬â¢s class or background. This democratic view emphasizes individuality and uniqueness. Throughout his work, Wordsworth showed strong support for the political, religious, and artistic rights of the individual, including the power of his or her mind. In the 1802 preface to Lyrical Ballads, Wordsworth explained the relationship between the mind and poetry. Poetry is ââ¬Å"emotion recollected in tranquilityâ⬠ââ¬âthat is, the mind transforms the raw emotion of experience into poetry capable of giving pleasure. Later poems, such as ââ¬Å"Ode: Intimations of Immortalityâ⬠(1807), imagine nature as the source of the inspiring material that nourishes the active, creative mind. The Splendor of Childhood In Wordsworthââ¬â¢s poetry, childhood is a magical, magnificent time of innocence. Children form an intense bond with nature, so much so that they appear to be a part of the natural world, rather than a part of the human, social world. Their relationship to nature is passionate and extreme: children feel joy at seeing a rainbow but great terror at seeing desolation or decay. In 1799, Wordsworth wrote several poems about a girl named Lucy who died at a young age. These poems, including ââ¬Å"She dwelt among the untrodden waysâ⬠(1800) and ââ¬Å"Strange fits of passion have I knownâ⬠(1800), praise her beauty and lament her untimely death. In death, Lucy retains the innocence and splendor of childhood, unlike the children who grow up, lose their connection to nature, and lead unfulfilling lives. The speaker in ââ¬Å"Ode: Intimations of Immortalityâ⬠believes that children delight in nature because they have access to a divine, immortal world. As children age and reach maturity, they lose this connection but gain an ability to feel emotions, both good and bad. Through the power of the human mind, particularly memory, adults can recollect the devoted connection to nature of their youth. SUMMARY Lines Composed a Few Miles above Tintern Abbey was written in July of 1798 and published as the last poem of Lyrical Ballads, also in 1798. At the age of twenty-three (in August of 1793), Wordsworth had visited the desolate abbey alone. In 1798 he returned to the same place with his beloved sister, Dorothy Wordsworth, who was a year younger. Dorothy is referred to as Friend throughout the poem. Often the poem is simply called Tintern Abbey. The abbreviated title is effective for claritys sake, but it is also misleading, as the poem does not actually take place in the abbey. Wordsworth begins his poem by telling the reader that it has been five years since he has been to this place a few miles from the abbey. He describes the Steep and lofty cliffs, the wild secluded scene, the quiet of the sky, the dark sycamore he sits under, the trees of the orchard, and the pastoral farms with wreaths of smoke billowing from their chimneys. In the fourth stanza, Wordsworth begins by explaining the pleasure he feels at being back in the place that has given him so much joy over the years. He is also glad because he knows that this new memory will give him future happiness: in this moment there is life and food / for future years. He goes on to explain how differently he experienced nature five years ago, when he first came to explore the area. During his first visit he was full of energy. Wordsworth quickly sets his current self apart from the way he was five years ago, saying, That time is past. At first, however, he seems almost melancholy about the change: And all its aching joys are now no more, / And all its dizzy raptures. Over the past five years, he has developed a new approach to nature. As a more sophisticated and wiser person with a better understanding of the sad disconnection of humanity, Wordsworth feels a deeper and more intelligent relationship with nature. Wordsworth is still / A lover of the meadows and the woods, but has lost some of his gleeful exuberance. Instead, he views nature as the anchor of [his] purest thoughts, the nurse, / The guide, the guardian of my heart, and soul / of all my moral being. Analysis Published in 1798 in Lyrical Ballads, this poem is widely considered to be one of Wordsworths masterpieces. It is a complex poem, addressing memory, mortality, faith in nature, and familial love. The poems structure is similarly complex, making use of the freedom of blank verse (no rhyming) as well as the measured rhythm of iambic pentameter (with a few notable exceptions). The flow of the writing has been described as that of waves, accelerating only to stop in the middle of a line (caesura). The repetition of sounds and words adds to the ebb and flow of the language, appropriately speaking to the ebb and flow of the poets memories. Divided into five stanzas of different lengths, the poem begins in the present moment, describing the natural setting. Wordsworth emphasizes the act of returning by making extensive use of repetition: Five years have passed; five summers, with the length / Of five long winters! and again I hear / These waters He also uses the phrase once again twice, both times in the middle of a line, breaking the flow of the text. It is in this manner that the reader is introduced to the natural beauty of the Wye River area. Wordsworth seems to value this period of his life, and remembers it with a somewhat nostalgic air, although he admits that in this simpler time (The coarser pleasures of my boyish days), he was not so sophisticated as he is now. In the present, he is weighed down by more serious thoughts. He alludes to a loss of faith and a sense of disheartenment. This transition is widely believed to refer to Wordsworths changing attitude towards the French Revolution. Having visited France at the height of the Revolution, Wordsworth was inspired by the ideals of the Republican movement. Their emphasis on the value of the individual, imagination, and liberty inspired him and filled him with a sense of optimism. By 1798, however, Wordsworth was already losing faith in the movement, as it had by then degenerated into widespread violence. Meanwhile, as France and Britain entered the conflict, Wordsworth was prevented from seeing his family in France and lost his faith in humanitys capacity for harmony. Wordsworth turns to nature to find the peace he cannot find in civilization. Wordsworth goes on to describe a spirit or a being connected with nature that elevates his understanding of the world: And I have felt a presence that disturbs me with the joy. This presence could refer to God or some spiritual consciousness, or it could simply refer to the unified presence of the natural world. In the interconnectedness of nature, Wordsworth finds the sublime harmony that he cannot find in humankind, and for this reason he approaches nature with an almost religious fervor. Like other Romantic poets, Wordsworth imagines that consciousness is built out of subjective, sensory experience. What he hears and sees (of all that we behold / of all the mighty world/ Of eye and ear) creates his perceptions and his consciousness (both what they half-create, / And what perceive). The language of the sensehis sensory experiencesare the building blocks of this consciousness (The anchor of my purest thoughts). Thus, he relies on his experience of nature for both consciousness and all [his] moral being. Form ââ¬Å"Tintern Abbeyâ⬠is composed in blank verse, which is a name used to describe unrhymed lines in iambic pentameter. Its style is therefore very fluid and natural; it reads as easily as if it were a prose piece. But of course the poetic structure is tightly constructed; Wordsworthââ¬â¢s slight variations on the stresses of iambic rhythms is remarkable. Lines such as ââ¬Å"Here, under this dark sycamore, and viewâ⬠do not quite conform to the stress-patterns of the meter, but fit into it loosely, helping Wordsworth approximate the sounds of natural speech without grossly breaking his meter. Occasionally, divided lines are used to indicate a kind of paragraph break, when the poet changes subjects or shifts the focus of his discourse. William Wordsworthââ¬â¢s Tintern Abbey: Lines Composed a Few Miles above Tintern Abbey is a poem by William Wordsworth that has a strong, central theme of romanticism. Wordsworth was the pioneer poet in the field of literary philosophy which is now called romanticism. This poem reflects a romantic theme in two main ways. First is that throughout the passage of the entirety of the poem, there is a stressed view point upon imagination and remembrance, and most notably lots of emotion involved in the poem. The second way this poem has a romantic theme is that the poet, Wordsworth, describes/exhibits his love of nature through his many revelations and remembering of memories. Continued, this poem shows lots of imagination and therefore romanticism by the way Wordsworth stresses memories. In the beginning of the poem he remembers the abbey from five years ago and he is reliving the memories. Then he describes how he perceives and longs for the same degree of nature in those five years since he has returned. Later in the poem, the author rejoices in the fact that he can fuel his imagination with new memories of this trip. In terms of the application of emotion, and therefore romanticism, Wordsworth uses many personal adjectives to describe nature around him. Rather than dote upon the size of the mountains and the age rings and the disrepair of the abbey, he takes an alternative viewpoint and uses emotions to show his joy for these things. The author is happy and it shows in the poem, this shows the romantic theme. The romantic theme of the poem also applies in a more simplistic manner in the way that the author longs for and enjoys everything about nature around him. As was noted in the previous sentence, the surrounding area makes him happy. In the poem Wordsworth says, he still loves nature, still loves mountains and pastures and woods, for they anchor his purest thoughts and guard the heart and soul of his moral being.
Friday, November 29, 2019
The American Dream Essays (400 words) - The Great Gatsby
The American Dream In The Great Gatsby, F. Scott Fitzgerald uses many repeated references to time in order to draw attention to the so-called American Dream, which is something Jay Gatsby sorely desires in this novel. Time is the most important motif in The Great Gatsby, the word itself appears 87 times! Gatsby is constantly striving to get back to that perfect moment in time is to recapture Daisy's heart. These time references are expressed through all the literary techniques. Some episodes which symbolize time are when Gatsby knocks over the clock and his list of famous party guests written on a timetable. Time itself is a dissolution, and therefore symbolizes the irony of the American Dream, another dissolution. As time passes, Gatsby and his aspirations for realizing this Dream seem to drift farther and farther apart. Others in the novel are striving for this patriotic goal as well. Myrtle (who's name is a noxious weed vine, that strives to climb) thinks she can find it through love; love of Tom Buchanan's money. The yellow-gold car that killed her (gold representing riches) is really her passion for all things materialistic shattering her dream. George Wilson, probably the most honest character in the book, also thinks the answer to finding the dream is love, but real love; for Myrtle, and himself. When he thinks Gatsby has killed his love, he kills him and then himself, knowing that his version of the dream is unattainable. The two people who truly appear to live the dream are Tom and Daisy. But they cheat on each other and have no love for one another. What kind of dream is that? Jay Gatsby threw extravagant parties in order to see Daisy, who never showed (But, then again neither did he). He peered out of his mansion, a mere copy of grandeur, and watched other dreamers pass their time.And as for time, the novel begins with the phrase: In my younger and more vulnerable years... and ends with ...borne bck ceaselessly into the past. Both emphasize the ignificance of time. The only compliment Nick ever pays tsby shows how the American Dream is not so valid in theGreat Gatsby. As Nick is leaving Gatsby's house, he shoutsfrom the lawn,They're a rotten crowd....you're worth thewhole bunch put together. l in all, time has eroded all these characters' perception of the American Dream. English Essays
Monday, November 25, 2019
What Were the Consequences of the Vietnam War for Civilians essays
What Were the Consequences of the Vietnam War for Civilians essays The US withdrawal made many problems for people on both sides. The Americans suffered mainly from the indignity of loosing and also the consequences of there use of things like Agent Orange.. The Vietnamese people suffered by having the aftermath of the US actions, they suffered famine and the significant problems of having deformed children. The effects of chemical warfare, although people had speculated about long term effects, they only really became apparent after the war. Like the links of Agent Orange with cancer, then in 1985 the first ideas that illness may be passed through generations were considered but were not proved until 1993. The land was badly contaminated by the use of chemicals, Vietnam had gone from one of the major rice producing countries to not being able to grow any thing, not even the relatively small amount to survive on a subsistence level. The Vietnamese people were then forced to import food, this began economic problems as there was no money to help theses people. Especially as inflation was at 700% and the Russians stooped providing the country with aid in 1991 The debree from the war posed a threat to Vietnamese people in unexploded land mines and sharp pieces of metal and so the unsuitability to farm the land or build on it. Other wars broke out in Vietnam with Cambodia and China, numerous people decided to leave. Many of these by boat, as many people as possible would be crammed into small vessels before sailing for Hong Kong or Thailand. Many of these boats were attacked by pirates or sank. Roughly 50,000 of the 'boat people' drowned. About a million were successful in traveling west settling in Britain and in the US. Things began to look up when, in 1993 the Americans allowed the international monetary fund and world bank to start investing in Vietnam. Then the trade embargo was lifted by 1995. Only 20 years after the US withdrawal were full diplomatic relations rees ...
Thursday, November 21, 2019
A close textual analysis of Aristotle BOOK 2 chapter 3 Essay
A close textual analysis of Aristotle BOOK 2 chapter 3 - Essay Example The formal cause is ââ¬Å"the account of what the being would beâ⬠, its genera and its parts, e.g. number and ration of two to one are causes of an octave. The efficient cause, ââ¬Å"the primary source of the change or staying unchangedâ⬠, is ââ¬Å"that which makes something of that which is madeâ⬠and ââ¬Å"changes something of that which is changedâ⬠, e.g. the sculptor, parents, etc. At last the final cause is the end of a thing, i.e. ââ¬Å"what something is forâ⬠, e.g. health is the final cause of walking and purging, drugs and surgical instruments (pp.28-29; 194 b 20 ââ¬â 35). Here it is necessary to dwell upon the nature of causes. Aristotle himself notes that ââ¬Å"many different things are calledâ⬠and ââ¬Å"can be causesâ⬠of the same thing, as well as the same thing can be a cause for many phenomena. First of all, as we try to understand the notion of ââ¬Å"causeâ⬠in terms of cause-and-effect position, it becomes wholly unclear how bronze may cause a statue, or whether a table can be caused by wood it is made of. Then as we remember that we read Aristotle in translation from Greek, you realize that the word could perhaps be interpreted by the means of other words. Indeed, the Greek aition has transformed into the present Italian aita (assistant), aiutare (to assist). Thus we understand the cause as something assisting, making another thing. In this case we may say that material assists the emergence of a form, i.e. a form is made out of the material and is impossible without it. The form assists things in fulfilling their functions. It would be difficult to use a shaky table with a vertical top. A carpenter assists the emergence of the table. Due to carpenterââ¬â¢s knowledge and skills of how to make tables this emergence is possible. Finally, it is the functions or purpose of the table which assist in the emergence of this piece of furniture being produced of definite firm materials and of definite form. Such a
Wednesday, November 20, 2019
Why life insurance is or is not appropriate in Islamic countries Research Paper
Why life insurance is or is not appropriate in Islamic countries - Research Paper Example The first one of the view that insurance of any kind is prohibited because it is an agreement based on doubts, it is against Godââ¬â¢s commands and insurance business is based on interest. Life insurance is used to cover financial loss happening from death. It is impossible to define life insurance in a single definition as there are different ways to explain it. In simple words life insurance is a tool to safeguard against natural calamities. The aim of every individual is to secure his family from future risks. Every person dreams for prosperous life for his near and dear ones, a bright future for their children and self without depending on others. The life insurance guarantees materializing these aims by paying them in terms of money. There was a time when necessities of life were fulfilled by government or charity organizations. As the population increases the resources are shrinking day by day. World is being governed by man-made laws and lust for power and corruption is multiplying in every walk of life. Basic necessities like food, shelter, education and social services are no more available. Even fresh and unpolluted breathing is no more. It seems difficult to make both ends meet. Individual earning in a family when meets with any misfortune like natural death, Job termination, disability etc than one can imagine how he will cope with all this. Here life insurance is the only option available to avail in this situation. Life insurance is a vast subject if studied it will give you a short- cut to fulfill above mentioned noble commitments. After collecting large sum of money from the public the insurance company with the governmentââ¬â¢s assistance can run various projects at national level. Through all this government uses this cash for various schemes such as power generation, special education, employment generation etc. In return government pays suitable interest so that public should get their maximum profit at
Monday, November 18, 2019
Its a Flat World, After All by Thomas Friedman Essay
Its a Flat World, After All by Thomas Friedman - Essay Example Friedman discusses the different flatteners of the world which have created a level playing field for all countries. These flatteners include the collapse of the Berlin Wall, Netscape, Workflow software, uploading, outsourcing, offshoring, supply chaining, insourcing, informing, and steroids. In reviewing these flatteners, it is important to understand the context upon which the word flattened or flat is used. Friedman uses the term flat in terms of the level of competence which all countries have in terms of access to information and technology, including economic growth and development. Such information is used in various activities including business, governance, education, and sports. Based on Friedmanââ¬â¢s arguments, he concludes that the world is flat because the access to information, technology, and the potential for economic growth is no longer the exclusive province of the developed states (Bijker, 1995). Instead, the economic, political, and social landscape has levele d out and this process has started unfolding ever since the fall of the Berlin Wall, becoming even more apparent starting in the year 2000 onwards. Undeniably, the use of technology and the spread and the access of information have become very much apparent in the current setting. The information represents an ââ¬Å"assemblage of dataâ⬠(Headrick, 2000, p. ... The information and technology are no longer exclusive or delayed in transmission. For a long, while geographical barriers between countries implied that different nations had different rates of growth; however, geographical barriers have become less of an issue through internet capability (Suchman, 2007). In relation to internet access therefore, Friedman provides strong support for the world being flat and less hierarchical. Since information is no longer exclusive to specific individuals or countries, the possibility of creating technology and innovations from such information is no longer also an exclusive right and privilege of specific countries (Wolf, 2008). This indicates that there are also innovators which can gain access to the same information from any part of the globe and then transform such information to innovations. For a long while, the US and other western nations were the global leaders in technology and innovation (Beniger, 1986). From such technology and innovat ions, they were able to make major advancements in labor-saving technology which increased productivity and made the work hours more efficient. With ââ¬Å"falling communication costs and the broader spectrum of activities that can be coordinated through current forms of computer-mediated interaction,â⬠more economic links were soon established (Kallinikos, 2010, p. 93). From such technology and innovations, the rest of the world looked to the west for dole-outs of these technologies. The adaptation of these technologies was carried out in order for the countries to keep up with western technologies.Ã
Saturday, November 16, 2019
Sources of noise in transistor
Sources of noise in transistor SOURCE OF NOISE IN TRANSISTOR FOR DIFFERENT CONFIGURATION Abstract- Here in this term paper, I am going to discuss the history of the transistors, its importance and its limitations. The term paper is on the sources of noise in transistors for different configurations. HISTORY A replica of the first working transistor. The first patent for the field-effect transistor principle was filed in Canada by Austrian-Hungarian physicist Julius Edgar Lilienfeld on October 22, 1925, but Lilienfeld did not publish any research articles about his devices. In 1934 German physicist Dr. Oskar Heil patented another field-effect transistor. On 17 November 1947 John Bardeen and Walter Brattain, at ATT Bell Labs, observed that when electrical contacts were applied to a crystal of germanium, the output power was larger than the input. William Shockley saw the potential in this and worked over the next few months greatly expanding the knowledge of semiconductors and is considered by many to be the father of the transistor. The term was coined by John R. Pierce. IMPORTANCE The transistor is considered by many to be the greatest invention of the twentieth-century, or as one of the greatest. It is the key active component in practically all modern electronics. Its importance in todays society rests on its ability to be mass produced using a highly automated process (fabrication) that achieves astonishingly low per-transistor costs. Although several companies each produce over a billion individually-packaged (known as discrete) transistors every year, the vast majority of transistors produced are in integrated circuits (often shortened to IC, microchips or simply chips) along with diodes, resistors, capacitors and other electronic components to produce complete electronic circuits. A logic gate consists of about twenty transistors whereas an advanced microprocessor, as of 2006, can use as many as 1.7 billion transistors (MOSFETs). About 60 million transistors were built this year [2002] for [each] man, woman, and child on Earth. The transistors low cost, flexibility and reliability have made it a ubiquitous device. Transistorized mechatronic circuits have replaced electromechanical devices in controlling appliances and machinery. It is often easier and cheaper to use a standard microcontroller and write a computer program to carry out a control function than to design an equivalent mechanical control function.[1] USAGE The bipolar junction transistor, or BJT, was the first transistor invented, and through the 1970s, was the most commonly used transistor. Even after MOSFETs became available, the BJT remained the transistor of choice for many analog circuits such as simple amplifiers because of their greater linearity and ease of manufacture. Desirable properties of MOSFETs, such as their utility in low-power devices, usually in the CMOS configuration, allowed them to capture nearly all market share for digital circuits; more recently MOSFETs have captured most analog and power applications as well, including modern clocked analog circuits, voltage regulators, amplifiers, power transmitters, motor drivers, etc. BJT used as an electronic switch, in grounded-emitter configuration. How a transistor works Amplifier circuit, standard common-emitter configuration. Simple circuit using a transistor. Operation graph of a transistor The essential usefulness of a transistor comes from its ability to use a small signal applied between one pair of its terminals to control a much larger signal at another pair of terminals. This property is called gain. A transistor can control its output in proportion to the input signal; this is called an amplifier. Or, the transistor can be used to turn current on or off in a circuit like an electrically controlled switch, where the amount of current is determined by other circuit elements. The two types of transistors have slight differences in how they are used in a circuit. A bipolar transistor has terminals labelled base, collector and emitter. A small current at base terminal can control or switch a much larger current between collector and emitter terminals. For a field-effect transistor, the terminals are labelled gate, source, and drain, and a voltage at the gate can control a current between source and drain. The image to the right represents a typical bipolar transistor in a circuit. Charge will flow between emitter and collector terminals depending on the current in the base. Since internally the base and emitter connections behave like a semiconductor diode, a voltage drop develops between base and emitter while the base current exists. The size of this voltage depends on the material the transistor is made from, and is referred to as VBE. Transistors are commonly used as electronic switches, for both high power applications including switched-mode power supplies and low power applications such as logic gates. It can be seen from the graph that once the base voltage reaches a certain level, shown at B, the current will no longer increase with increasing VBE and the output will be held at a fixed voltage.[dubious discuss] The transistor is then said to be saturated. Hence, values of input voltage can be chosen such that the output is either completely off, or completely on. The transistor is acting as a switch, and this type of operation is common in digital circuits where only on and off values are relevant. TRANSISTOR AS AN AMPLIFIER The above common emitter amplifier is designed so that a small change in voltage in (Vin) changes the small current through the base of the transistor and the transistors current amplification combined with the properties of the circuit mean that small swings in Vin produce large changes in Vout. It is important that the operating parameters of the transistor are chosen and the circuit designed such that as far as possible the transistor operates within a linear portion of the graph, such as that shown between A and B, otherwise the output signal will suffer distortion. Various configurations of single transistor amplifier are possible, with some providing current gain, some voltage gain, and some both. From mobile phones to televisions, vast numbers of products include amplifiers for sound reproduction, radio transmission, and signal processing. The first discrete transistor audio amplifiers barely supplied a few hundred milliwatts, but power and audio fidelity gradually increased as better transistors became available and amplifier architecture evolved. Modern transistor audio amplifiers of up to a few hundred watts are common and relatively inexpensive. Some musical instrument amplifier manufacturers mix transistors and vacuum tubes in the same circuit, as some believe tubes have a distinctive sound.Prior to the development of transistors, vacuum (electron) tubes (or in the UK thermionic valves or just valves) were the main active components in electronic equipment. ADVANTAGES The key advantages that have allowed transistors to replace their vacuum tube predecessors in most applications are: I. Small size and minimal weight, allowing the development of miniaturized electronic devices. II. Highly automated manufacturing processes, resulting in low per-unit cost. III. Lower possible operating voltages, making transistors suitable for small, battery-powered applications. IV. No warm-up period for cathode heaters required after power application. V. Lower power dissipation and generally greater energy efficiency. VI. Higher reliability and greater physical ruggedness. VII. Extremely long life. Some transistorized devices produced more than 30 years ago are still in service. VIII. Complementary devices available, facilitating the design of complementary-symmetry circuits, something not possible with vacuum tubes. IX. Insensitivity to mechanical shock and vibration, thus avoiding the problem of microphonics in audio applications. [2] LIMITATIONS I. Silicon transistors do not operate at voltages higher than about 1,000 volts (SiC devices can be operated as high as 3,000 volts). In contrast, electron tubes have been developed that can be operated at tens of thousands of volts. II. High power, high frequency operation, such as used in over-the-air television broadcasting, is better achieved in electron tubes due to improved electron mobility in a vacuum. III. On average, a higher degree of amplification linearity can be achieved in electron tubes as compared to equivalent solid state devices, a characteristic that may be important in high fidelity audio reproduction. IV. Silicon transistors are much more sensitive than electron tubes to an electromagnetic pulse, such as generated by a nuclear explosion. V. Semiconductor material: germanium, silicon, gallium arsenide, silicon carbide, etc. VI. Structure: BJT, JFET, IGFET (MOSFET), IGBT, other types VII. Polarity: NPN, PNP (BJTs); N-channel, P-channel (FETs) VIII. Maximum power rating: low, medium, high IX. Maximum operating frequency: low, medium, high, radio frequency (RF), microwave (The maximum effective frequency of a transistor is denoted by the term fT, an abbreviation for frequency of transition. The frequency of transition is the frequency at which the transistor yields unity gain). X. Application: switch, general purpose, audio, high voltage, super-beta, matched pair XI. Physical packaging: through hole metal, through hole plastic, surface mount, ball grid array, power modules XII. Amplification factor hfe (transistor beta) Thus, a particular transistor may be described as: silicon, surface mount, BJT, NPN, low power, high frequency switch. The bipolar junction transistor (BJT) was the first type of transistor to be mass-produced. Bipolar transistors are so named because they conduct by using both majority and minority carriers. The three terminals of the BJT are named emitter, base and collector. Two p-n junctions exist inside a BJT: the base/emitter junction and base/collector junction. The [BJT] is useful in amplifiers because the currents at the emitter and collector are controllable by the relatively small base current. In an NPN transistor operating in the active region, the emitter-base junction is forward biased, and electrons are injected into the base region. Because the base is narrow, most of these electrons will diffuse into the reverse-biased base-collector junction and be swept into the collector; perhaps one-hundredth of the electrons will recombine in the base, which is the dominant mechanism in the base current. By controlling the number of electrons that can leave the base, the number of electrons ent ering the collector can be controlled. Unlike the FET, the BJT is a low-input-impedance device. Also, as the base-emitter voltage (Vbe) is increased the base-emitter current and hence the collector-emitter current (Ice) increase exponentially according to the Shockley diode model and the Ebers-Moll model. Because of this exponential relationship, the BJT has a higher transconductance than the FET. Bipolar transistors can be made to conduct by exposure to light, since absorption of photons in the base region generates a photocurrent that acts as a base current; the collector current is approximately beta times the photocurrent. Devices designed for this purpose have a transparent window in the package and are called phototransistors. FIELD EFFECT TRANSISTORS The field-effect transistor (FET), sometimes called a unipolar transistor, uses either electrons (in N-channel FET) or holes (in P-channel FET) for conduction. The four terminals of the FET are named source, gate, drain, and body (substrate). On most FETs, the body is connected to the source inside the package, and this will be assumed for the following description. In FETs, the drain-to-source current flows via a conducting channel that connects the source region to the drain region. The conductivity is varied by the electric field that is produced when a voltage is applied between the gate and source terminals; hence the current flowing between the drain and source is controlled by the voltage applied between the gate and source. As the gate-source voltage (Vgs) is increased, the drain-source current (Ids) increases exponentially for Vgs below threshold, and then at a roughly quadratic rate (I_{ds} propto (V_{gs}-V_T)^2) (where VT is the threshold voltage at which drain current begins) in the space-charge-limited region above threshold. A quadratic behavior is not observed in modern devices, for example, at the 65 nm technology node. For low noise at narrow bandwidth the higher input resistance of the FET is advantageous. FETs are divided into two families: junction FET (JFET) and insulated gate FET (IGFET). The IGFET is more commonly known as metal-oxide-semiconductor FET (MOSFET), from their original construction as a layer of metal (the gate), a layer of oxide (the insulation), and a layer of semiconductor. Unlike IGFETs, the JFET gate forms a PN diode with the channel which lies between the source and drain. Functionally, this makes the N-channel JFET the solid state equivalent of the vacuum tube triode which, similarly, forms a diode between its grid and cathode. Also, both devices operate in the depletion mode, they both have a high input impedance, and they both conduct current under the control of an input voltage. Metal-semiconductor FETs (MESFETs) are JFETs in which the reverse biased PN junction is replaced by a metal-semiconductor Schottky-junction. These, and the HEMTs (high electron mobility transistors, or HFETs), in which a two-dimensional electron gas with very high carrier mobility is used for charge transport, are especially suitable for use at very high frequencies (microwave frequencies; several GHz). Unlike bipolar transistors, FETs do not inherently amplify a photocurrent. Nevertheless, there are ways to use them, especially JFETs, as light-sensitive devices, by exploiting the photocurrents in channel-gate or channel-body junctions. FETs are further divided into depletion-mode and enhancement-mode types, depending on whether the channel is turned on or off with zero gate-to-source voltage. For enhancement mode, the channel is off at zero bias, and a gate potential can enhance the conduction. For depletion mode, the channel is on at zero bias, and a gate potential (of the opposite polarity) can deplete the channel, reducing conduction. For either mode, a more positive gate voltage corresponds to a higher current for N-channel devices and a lower current for P-channel devices. Nearly all JFETs are depletion-mode as the diode junctions would forward bias and conduct if they were enhancement mode devices; most IGFETs are enhancement-mode types.[3] OTHER TRANSISTORS TYPE I. Point-contact transistor, first type of transistor ever constructed II. Bipolar junction transistor (BJT) a. Heterojunction bipolar transistor up to 100s GHz, common in modern ultrafast and RF circuits b. Grown-junction transistor, first type of BJT c. Alloy-junction transistor, improvement of grown-junction transistor i. Micro-alloy transistor (MAT), faster than alloy-junction transistor ii. Micro-alloy diffused transistor (MADT), faster than MAT, type of a diffused-base transistor iii. Post-alloy diffused transistor (PADT), faster than MAT, type of a diffused-base transistor iv. Schottky transistor v. Surface barrier transistor d. Drift-field transistor e. Avalanche transistor f. Darlington transistors are two BJTs connected together to provide a high current gain equal to the product of the current gains of the two transistors. g. Insulated gate bipolar transistors (IGBTs) use a medium power IGFET, similarly connected to a power BJT, to give a high input impedance. Power diodes are often connected between certain terminals depending on specific use. IGBTs are particularly suitable for heavy-duty industrial applications. The Asea Brown Boveri (ABB) 5SNA2400E170100 illustrates just how far power semiconductor technology has advanced. Intended for three-phase power supplies, this device houses three NPN IGBTs in a case measuring 38 by 140 by 190mm and weighing 1.5kg. Each IGBT is rated at 1,700 volts and can handle 2,400 amperes. h. Photo transistor React to light III. Field-effect transistor a. JFET, where the gate is insulated by a reverse-biased PN junction b. MESFET, similar to JFET with a Schottky junction instead of PN one i. High Electron Mobility Transistor (HEMT, HFET, MODFET) c. MOSFET, where the gate is insulated by a thin layer of insulator d. Inverted-T field effect transistor (ITFET) e. FinFET The source/drain region forms fins on the silicon surface. f. FREDFET Fast-Reverse Epitaxial Diode Field-Effect Transistor g. Thin film transistor Used in LCD display. h. OFET Organic Field-Effect Transistor, in which the semiconductor is an organic compound i. Ballistic transistor j. Floating-gate transistor Used for non-volatile storage. k. FETs used to sense environment i. Ion sensitive field effect transistor To measure ion concentrations in solution. ii. EOSFET Electrolyte-Oxide-Semiconductor Field Effect Transistor (Neurochip) iii. DNAFET Deoxyribonucleic acid field-effect transistor IV. Spacistor V. Diffusion transistor, formed by diffusing dopants into semiconductor substrate; can be both BJT and FET VI. Unijunction transistors can be used as simple pulse generators. They comprise a main body of either P-type or N-type semiconductor with ohmic contacts at each end (terminals Base1 and Base2). A junction with the opposite semiconductor type is formed at a point along the length of the body for the third terminal (Emitter). VII. Single-electron transistors (SET) consist of a gate island between two tunnelling junctions. The tunnelling current is controlled by a voltage applied to the gate through a capacitor. VIII. Spin transistor Magnetically-sensitive IX. Nanofluidic transistor Control the movement of ions through sub-microscopic, water-filled channels. Nanofluidic transistor, the basis of future chemical processors X. Multigate devices a. Tetrode transistor b. Pentode transistor c. Multigate device d. Trigate transistors (Prototype by Intel) e. Dual gate FETs have a single channel with two gates in cascode; a configuration that is optimized for high frequency amplifiers, mixers, and oscillators f. Semiconductor material XI. The first BJTs were made from germanium (Ge). Silicon (Si) types currently predominate but certain advanced microwave and high performance versions now employ the compound semiconductor material gallium arsenide (GaAs) and the semiconductor alloy silicon germanium (SiGe). Single element semiconductor material (Ge and Si) is described as elemental. Rough parameters for the most common semiconductor materials used to make transistors are given in the table below; it must be noted that these parameters will vary with increase in temperature, electric field, impurity level, strain and various other factors: Semiconductor material characteristics Semiconductormaterial Junction forwardvoltageV @ 25 à °C Electron mobilitymà ²/(Và ·s) @ 25 à °C Hole mobilitymà ²/(Và ·s) @ 25 à °C Max. junction temp.à °C Ge 0.27 0.39 0.19 70 to 100 Si 0.71 0.14 0.05 150 to 200 GaAs 1.03 0.85 0.05 150 to 200 Al-Si junction 0.3 ââ¬â ââ¬â 150 to 200 The junction forward voltage is the voltage applied to the emitter-base junction of a BJT in order to make the base conduct a specified current. The current increases exponentially as the junction forward voltage is increased. The values given in the table are typical for a current of 1 mA (the same values apply to semiconductor diodes). The lower the junction forward voltage the better, as this means that less power is required to drive the transistor. The junction forward voltage for a given current decreases with increase in temperature. For a typical silicon junction the change is approximately âËâ2.1 mV/à °C. The density of mobile carriers in the channel of a MOSFET is a function of the electric field forming the channel and of various other phenomena such as the impurity level in the channel. Some impurities, called dopants, are introduced deliberately in making a MOSFET, to control the MOSFET electrical behavior. The electron mobility and hole mobility columns show the average speed that electrons and holes diffuse through the semiconductor material with an electric field of 1 volt per meter applied across the material. In general, the higher the electron mobility the faster the transistor. The table indicates that Ge is a better material than Si in this respect. However, Ge has four major shortcomings compared to silicon and gallium arsenide: I. its maximum temperature is limited II. it has relatively high leakage current III. it cannot withstand high voltages IV. it is less suitable for fabricating integrated circuits Because the electron mobility is higher than the hole mobility for all semiconductor materials, a given bipolar NPN transistor tends to be faster than an equivalent PNP transistor type. GaAs has the highest electron mobility of the three semiconductors. It is for this reason that GaAs is used in high frequency applications. A relatively recent FET development, the high electron mobility transistor (HEMT), has a heterostructure (junction between different semiconductor materials) of aluminium gallium arsenide (AlGaAs)-gallium arsenide (GaAs) which has double the electron mobility of a GaAs-metal barrier junction. Because of their high speed and low noise, HEMTs are used in satellite receivers working at frequencies around 12GHz. Max. junction temperature values represent a cross section taken from various manufacturers data sheets. This temperature should not be exceeded or the transistor may be damaged. Al-Si junction refers to the high-speed (aluminum-silicon) semiconductor-metal barrier diode, commonly known as a Schottky diode. This is included in the table because some silicon power IGFETs have a parasitic reverse Schottky diode formed between the source and drain as part of the fabrication process. This diode can be a nuisance, but sometimes it is used in the circuit.[4] Packaging Through-hole transistors (tape measure marked in centimetres) Transistors come in many different packages (chip carriers) (see images). The two main categories are through-hole (or leaded), and surface-mount, also known as surface mount device (SMD). The ball grid array (BGA) is the latest surface mount package (currently only for large transistor arrays). It has solder balls on the underside in place of leads. Because they are smaller and have shorter interconnections, SMDs have better high frequency characteristics but lower power rating. Transistor packages are made of glass, metal, ceramic or plastic. The package often dictates the power rating and frequency characteristics. Power transistors have large packages that can be clamped to heat sinks for enhanced cooling. Additionally, most power transistors have the collector or drain physically connected to the metal can/metal plate. At the other extreme, some surface-mount microwave transistors are as small as grains of sand. Often a given transistor type is available in different packages. Transistor packages are mainly standardized, but the assignment of a transistors functions to the terminals is not: different transistor types can assign different functions to the packages terminals. Even for the same transistor type the terminal assignment can vary (normally indicated by a suffix letter to the part number- i.e. BC212L and BC212K)[5]. CONCLUSION A unified noise model which incorporates both the number fluctuation and the correlated surface mobility fluctuation mechanism is discussed. The latter is attributed to the Coulombic scattering effect of the fluctuating oxide charge. The model has a functional form resembling that of the number fluctuation theory, but at certain bias conditions it may reduce to a form compatible with Hooges empirical expression. The model can unify the noise data reported in the literature, without making any ad hoc assumption on the noise generation mechanism. Specifically, the model can predict the right magnitude and bias dependence of the empirical Hooge parameter. Simulated noise characteristics obtained with a circuit-simulation-oriented fnoise model based on the new formulation were compared with experimental noise data. Excellent agreement between the calculations and measurement was observed in both the linear and saturation regions for MOS transistors fabricated by different technologies. T he work shows that the flicker noise in MOS transistors can be completely explained by the trap charge fluctuation mechanism, which produces mobile carrier number fluctuation and correlated surface mobility fluctuationIn electronics, a transistor is a semiconductor device commonly used to amplify or switch electronic signals. A transistor is made of a solid piece of a semiconductor material, with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistors terminals changes the current flowing through another pair of terminals. Because the controlled (output) power can be much larger than the controlling (input) power, the transistor provides amplification of a signal. The transistor is the fundamental building block of modern electronic devices, and is used in radio, telephone, computer and other electronic systems. Some transistors are packaged individually but most are found in integrated circuits. REFERENCES- [1]www.ciphersbyritter.com/NOISE/NOISRC.HTM [2]www.nikhef.nl/~jds/vlsi/noise/transistor [3]www.colorado.edu/physics/phys3330/phys3330_fa05/manual/Exp [4]www.imagesensors.org/Past%20Workshops/2003%20Workshop/2003%20Papers/27%20Findlater%20et%20al [5]www.ansoft.com/news/articles/HF0605
Wednesday, November 13, 2019
The importance of the role played by the educated elite in the process
africa came under the direct jurisdiction of Europe after the initial carving out of the continent referred to as the 'Scramble for Africa'. This partition was fulfilled at the Conference of Berlin 1884-85 resulting in the political mapping of the continent. Thus, Africa facilitated the extension of the European hegemonic powers overseas. This colonization rendered the African continent the play-toy of wealthy European imperialists who raked the profits from the resource-rich territories. The period between 1880 and 1919 saw an upsurge of African resistance to colonial rule this was the period of African nationalism. The Africans were now exasperated with their economic and social situation. Thus discontent and protest was bound to surface. During colonialism generally there was the raising of a small group usually through education and a diffusion of European culture. For the French and the British the style of education was different, the French was one of making French men in Afr ica while the British was more indirect. However it was this group that benefited from education whether French or British were to play a key role in the decolonisation process. Crowder states that the First World War raised the hopes of this emergent class all over Africa that they would be given positions of significance and respect from the colonizers; however these hopes were never realised. The traditional elites were also disgruntled with colonisation as many of them lost their positions and respect not only from the colonizers but also from their people. Moreover, where they retained their positions many of them became puppets of the colonisers. The loss of real power, respect and social standing became a source of discontent among many of them. Neither set of elites were satisfied with colonial rule. An international congress which was convened under the auspices of the comintern at Brussels on February 1927 resulted in the formation of the league against imperialism and for national independence; this provided further impetus for the decolonisation schemes. The congress was attended by 180 delegates from Western Europe, north central and South America, the Caribbean, Asia and Africa. The congress brought together socialists like the independent labour party, the radical leaders in colonial territories and representatives from Africa including Messali Hadj, Abd al-Kadir f... ... In some parts of Africa, European control ended by the early 1970's however a visible and dramatic legacy of colonial rule remained in the form of white colonial elites. due to the apartheid restrictions attempts were made to form political organizations there was the south African native national congress under the leadership of Clements Kadalie, there was also the industrial and commercial workers union whose membership grew to two hundred thousand despite the whites despite attempt to hold on to power. And although they did not receive full sovereignty until later the significance of the political groups played a significant role. Thus, in the former British colonies of Rhodesia (Zimbabwe) and South Africa, the small white minority held onto power over the disenfranchised and repressed black African populations well into the 1980's. It was only with the ending of white rule in Rhodesia in 1980, and the final crumbling of the racist policies of apartheid in S. Africa in 1990 t hat decolonization finally reached all parts of this continent. Nevertheless although their struggle was long it was still through the educated elite with mass support that final independence was achieved.
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