Lean Burn Engine Technology

Introduction With the rising desire to attain more miles per gallon of fuel, car manufacturers are now focusing their attention on lean burn engine technologies. On its part, the American government demonstrated its support for lean burn engine technology when it ratified the Energy Policy Act of 2005.Advertising We will write a custom research paper sample on Lean Burn Engine Technology specifically for you for only $16.05 $11/page Learn More In essence, this act qualified cars, trucks, and sports utility vehicles that had engines using the lean burn technology for tax rebates amounting to as much as $2000 under the stipulation of that act. This research paper will examine the technology behind lean burn engines, its impact on the environment and its future prospects (Tobias, et al. 2006). The first lean burn technology for automobile engines was introduced in the market nearly four decades ago by Chrysler. The technology comprised of a set of sensors a nd electronics that would generally regulate the movement of the spark plug under a range of driving circumstances. This technology was meant to increase the performance of the engine and utilize the fuel used per mile. Initially, the automotive challenge that the inventors of lean burn technology wanted to overcome was the throttling losses. Naturally, an automobiles car must have enough space to provide the required power for acceleration but still be able to operate below its possible output when driving at high speed and this was hard to achieve using the lean burn technology (Tobias, et al. 2006). At the present, a large percentage of cars utilize a form of technology commonly known as the four-stroke combustion cycle to convert fuel into motion. This kind of technology is also referred to as the Otto cycle, in respect of Nikolaus Otto, who discovered it in 1867. The main problem of this kind of engine technology is that it consumes much fuel and environmentalists consider it h armful to the ozone layer. On its part, the lean burn engine technology utilizes refined ignition systems along with advanced emission technologies. This combination allows cars using this technology to attain excellent mileage performance and causes minimal threat to the environment (Tobias, et al. 2006). Lean Burn Engine Technology Currently, internal combustion engines that use natural gas are commanding more attention as interest grows in manufacturing automobile engines that are both efficient and environmentally friendly. In response to this interest, automobile manufacturers have introduced natural gas automobile engine sets that feature â€Å"lean-burn† technology.Advertising Looking for research paper on engineering? Let's see if we can help you! Get your first paper with 15% OFF Learn More The technology is referred to as lean because unlike the convectional engine technology it uses excess air along with the fuel. The use of this kind of technology ha s brought about two positive effects. First, the excess air used in lean burn technology reduces the temperature of the combustion process and this lowers the amount of oxides of nitrogen (NOx) produced by nearly half, compared to a conventional gasoline engine. Second, since there is also excess oxygen available, the combustion process is more efficient and more power is produced from the same amount of fuel (Tobias, et al. 2006). The Combustion Process Any air/fuel reaction requires an energy source to initiate combustion. In the conventional petroleum engines, the combustion process is initiated by the spark plug. In lean-burn gas engines, the combustion process is initiated by pre-mixing the air and fuel upstream of the turbocharger before being introduced into the cylinder. This creates a more homogenous mixture in the combustion chamber and reduces the occurrence of â€Å"knocking† or detonation. To prevent either knocking or misfiring, the combustion process must be co ntrolled within a narrow operating window. In lean burn engine technology, the charge air temperatures together with air to fuel ratio are closely monitored. This is done by the microprocessor- based engine controller, which regulates the fuel flow and air/gas mixture and ignition timing (Cutter Information Corp., 1992). Unlike the conventional petroleum engine, the design of the lean-burn engine incorporates a simple open combustion chamber housed in the piston crown. The shape of the piston crown introduces turbulence in the incoming air/fuel mixture that promotes complete combustion by thoroughly exposing it to the advancing flame front. The flame plate of the cylinder head is regular (flat) and the spark plug is centrally located. The air and gas fuel are correctly mixed under the control of the engine management system (Cutter Information Corp., 1992).Advertising We will write a custom research paper sample on Lean Burn Engine Technology specifically for you for only $16.05 $11/page Learn More Improving efficiency of the System Although lean burn engines that use natural gas have been in existence for some time now, there is room for improvement in terms of energy efficiency and emissions reduction. In fact, enhancing the efficiency of lean burn gas engines remains one of the most likely and cost-effective approaches to enhancing vehicle fuel economy over the next three decades. According to automobile experts, the United States has the potential of reducing its transportation fuel usage by as much as 40% through the production of engines that use the lean burn gas technology (Automotive News, 1992). If this is achieved, it will definitely lead to better economic, environmental, and energy security. By using lean burn engine technology in hybrid and plug-in hybrid electric vehicles, it is possible to attain even greater fuel saving benefits (EIA, 2008). Ideally, one way of increasing the efficiency of the lean burn engine tec hnology is by focusing on complementary technology pathways involving shared partnerships with vehicle and engine manufacturers, suppliers, national laboratories, and learning institutions. Another strategy that can increase the efficiency of automobile engines using the lean burn technology is by inventing new combustion energy than the currently available natural gas usage. However, this should have minimal emissions in order to enable the engines to meet the required emission regulations without having to use the complex and costly equipment that is currently required. The invention of a cheap technology would definitely ensure that more people buy vehicles fitted with lean burn engines since the current costs have been a hindrance to many people (EIA, 2008). Ideally, one way of achieving all these strategies is by having well balanced research and development efforts ranging from basic research to prototype demonstration. This should be informed at every stage by industry collab orators whose role is to help in identifying the critical barriers to the commercialization of this technology.Advertising Looking for research paper on engineering? Let's see if we can help you! Get your first paper with 15% OFF Learn More The existing public laboratories and universities should also increase their efforts in understanding how the combustion process can be enhanced to maximize its performance and keep emissions at minimal (Pollack, 1992). Environmental Impact of Lean Burn Engine Technology Motor vehicles continue to be the dominant source of air pollution despite tremendous advances in engine technology and pollution control. In industrialized countries, even as cleaner vehicles are replacing older ones, and as transportation emissions are beginning to decline, vehicles are still the major source of air pollution. Meanwhile, in the developing world, vehicle numbers are growing exponentially and without strict control standards in place, emissions from transportation sources are becoming an increasingly urgent concern (Tobias, et al. 2006). There have been repeated calls for gasoline vehicles to raise fuel economy, and thus decrease CO2 emissions. Lean-burn engine designs that use natural gas reduce fu el consumption by 15–20%. In order not to trade off higher fuel efficiency for increased pollutant emissions, lean-burn engine designs will require new aftertreatment technology for control of Nitrogen Oxides (NOx) emissions. NOx storage traps, the most efficient existing NOx control technology for lean-burn engines, are much more dramatically impacted by fuel sulfur than other form of engine technologies. Because higher sulfur levels reduce the effectiveness of the traps and necessitate increased fuel consumption, ultralow sulfur fuel is the key enabler for increasing the efficiency of vehicles using the lean burn engine technology (Tobias, et al. 2006). The lean-burn engine increases the ratio of air to fuel, thus reducing fuel use. Lean-burn engines provide an automatic benefit for CO and HC control, which are formed in smaller amounts and can be more easily oxidized in the oxygen-rich exhaust. The challenge comes with control of NOx in an oxygen-abundant environment. NOx storage traps face fewer technical challenges in natural gas engines than in diesel engines because combustion temperatures are easier to control. NOx storage traps demonstrate over 90% efficiency in storage and conversion of NOx to N2, but require virtually sulfur-free fuels for efficient use and this has not yet been achieved (Tobias, et al. 2006). Storage traps operate by incorporating basic oxides into the catalyst, which in turn reacts with the oxidized NO2 in the presence of excess O2 to form fairly stable nitrates. NOx can be stored in this way during lean combustion (excess oxygen) conditions. As the storage medium approaches saturation, or whenever acceleration occurs, the engine will burn fuel-rich, generating CO and HC gases. This triggers the release of NO2, which reacts, as in a three way canisters to oxidize CO and HC to CO2 and H2O while simultaneously being reduced to N2 (Tobias, et al. 2006). One of the results of this technology is significantly reduced emissions i n the exhaust. Most of the new lean-burn automobile engines have NOx emissions as low as.85 grams/BHP-hr, and produce low amounts of hydrocarbons (HC), carbon monoxide (CO) and particulate matter (PM). This allows the engine sets to meet the most stringent air quality regulations without after-treatment devices in the exhaust stream. For even lower emissions, lean-burn automobile engine sets are frequently coupled with integrated after-treatment options such as Selective Catalytic Reduction (SCR) and Oxidation Catalysts, resulting in NOx levels at or below 0.15 grams/BHP-hr. With these after-treatment options, the lean gas automobile engines have been shown to meet the most stringent prime power emissions regulations anywhere in the world (Tobias, et al. 2006). As it has already been noted, the lean burn engine technology will enable huge leaps in fuel efficiency, translating directly into reductions in CO2 emissions in automobiles. If properly utilized, this technology could dramat ically reduce both greenhouse gas and conventional pollutant emissions. Additionally, research continues on how to make zero-emission transportation technologies, such as the hydrogen fuel cell economically viable. Sulfur is a major obstacle for technologies to both reduce and eliminate greenhouse gas emissions. The reduced fuel use in lean burn engine technology means that low sulfur is generated and this is definitely a good thing for the environment (Johnson, 1992). Sulfur levels in fuel have a range of direct and indirect impacts on greenhouse gas emissions. Sulfur prevents the efficient functioning of certain types of catalysts, which in turn translates into higher methane emissions from oxidation catalysts and higher CO2 emissions from more advanced technologies. Sulfur also impedes the viability of emissions control technologies in several arenas. In addition, fuel cells—the most promising long-term solution for eliminating greenhouse gas emissions—will require sulfur-free fuels in order to function. This goal is attainable if the use of lean burn engine technology in automobiles is fully adopted (Johnson, 1992). Fuel flexibility Another advantage of the lean-burn engine technology with full-authority electronic engine controls is the ability to operate on gas with a wide range of quality. A measurement called the Methane Number (MN) is used to determine gas suitability as an engine fuel. Most natural gas has an MN from 70 to 97, and pipeline quality gas typically has an MN of about 75. Resource recovery gas from landfills or sewage treatment facilities is typically of lower quality, but is often suitable for use in lean-burn engines. Most of the lean-burn automobile engines operate on gas with an MN of 50 or greater, providing excellent fuel flexibility. However, gas with a MN below 70 may require the engines output to be derated. Lean-burn gas engine sets are setting a new standard for fuel efficiency, high power output for their size, a nd for low emissions. In regions with supplies of natural gas, these engine sets are providing highly reliable electric power for utility peaking, distributed generation, prime power and for combined heat and power systems (MacKenzie, Roger, Donald, 1992). The Future Prospects of Lean Burn Technology Currently, there is an increased interest in lean-burn engine technologies, i.e. lean-burn natural gas engines, mainly due to their higher fuel efficiency compared to conventional petroleum engines (Greene, 2005). These engines work under excess oxygen and consequently produce oxygen-rich exhaust. However, effectively reducing NOx in oxygen-rich exhaust is a challenging endeavor because the conventional three-way catalyst technology is not able to reduce NOx efficiently under any circumstances. Therefore, new catalytic systems have to be developed. Several approaches have been suggested and among the most promising is the so-called NOx storage reduction (NSR) concept. Because of the th ree-way catalyst, the emission of NOx by natural gas engines has decreased significantly. However, this gain is counteracted by the continuing rise in vehicle numbers and distances traveled, particularly by the increase in the number of diesel engines that do not use the lean burn engine technology. The latest quarterly pricing survey by PricewaterhouseCoopers (Greene, 2005) shows that cars using the lean burn engine technology accounted for 49% of the total European car market at the end of 2005. It is expected that the number of cars using the lean burn engine technology will continue to grow, potentially achieving 55-60% of the total market. There are several reasons for the increased interest in lean burn engines that use natural gas. The lean-burn combustion of natural gas engines results in higher fuel efficiency compared to conventional petroleum engines and consequently significantly lower amounts of the greenhouse gas CO2. In addition, natural gas has enhanced performance r egarding CO and HC. Most governments in Westerns countries have been encouraging the use of lean burn engine technology. Tax regimes make natural gas cheaper than petroleum in order encourage the sales of lean burn technology engines (MacKenzie, Roger, Donald, 1992). The increased interest in lean-burn engine technology has prompted research on the development of a new catalyst that is capable of reducing NOx in excess O2 to meet future legislation. Selective catalytic reduction (SCR) of NOx using ammonia (NH3) or urea (CO (NH2)2) is a well-known process in industry as well as in stationary lean burn engine applications. In the presence of O2, NH3 tends to react with NOx to form N2. Urea, which is safer in use than NH3, can be used as NH3 source and urea-based systems are already applied for heavy-duty trucks (Sanger, 2001). Higher fuel efficiency and reduced emissions of the greenhouse gas CO2 make lean-burn engines attractive compared to conventional petroleum engines. However, c ontrolling the exhaust NOx emission has been recognized as one of the most challenging aspects for lean-burn engine technology as the conventional three-way catalyst is not effective in reducing NOx in a lean exhaust due to the high oxygen level (Sanger, 2001). A NOx storage/reduction (NSR) catalyst is among the most promising solutions to control NOx in lean exhaust. The NSR catalyst contains a storage component in order to store NOx under lean conditions. Catalyst regeneration is necessary as the storage capacity of the absorbing component gets saturated (Brunekreef, et al, 2010). Regeneration takes place by the introduction of a short period of rich driving, as injections of extra fuel cause decomposition of stored NOx and subsequent reduction into N2. A critical aspect of the NSR technology is the catalyst deactivation by sulfur. A detailed understanding about the NOx storage and reduction mechanism is important for improving catalyst regeneration times and preventing catalyst d eactivation. There has also been increased funding on research to ensure that commercialization of lean burn engine technology will not produce unintended human health effects. The already conducted research on this field has revealed that lean burn engines using low sulfur (less than 15-ppm sulfur) fuel and equipped with catalyzed particulate matters does not cause lung inflammation or pose other health hazards. This shows that the future prospects of lean burn engine technology is indeed bright just by looking at its environmental and financial factors and the increased funding from governments that want to develop an environmentally friendly ecosystem (Brunekreef, et al, 2010). Conclusion With the increased desire to gain more miles per gallon of fuel, car manufacturers are turning their attention to lean burn engine technologies. Over the last few years, the number of vehicles using engines made from lean burn technology has been on the rise. This has been enhanced by the effort s of various governments, which have been offering tax cuts to those purchasing cars fitted with this kind of engine technology. Although there are numerous challenges that have prevented this technology from being fully adopted, current trends in the automobile industry show that these challenges can be overcome in the course of time. With most governments and organizations keen on preserving the environment, there is no doubt that the use of lean burn engine technology will gain more popularity in the coming years. References Automotive News. (1992). Cleaner Civic OK in California. Automotive News 19 (2), 8. Brunekreef, B., et al. (2010). Air Pollution from Truck Traffic and Lung Function in Children Living Near Motorways. Epidemiology 8 (1), 298–303. Cutter Information Corp. (1992). Lean Burn Takes a Step Forward. Global Environmental Change Report, 7, (1), 7. EIA. (2008). The Transition to Ultralow-Sulfur Diesel Fuel: Effects on Prices and Supply. Washington: Energy Infor mation Administration. Greene, D. (2005). A Note on Implicit Consumer Discounting of Automobile Fuel Economy: Reviewing the Available Evidence. Transportation Research 17 (6), 491-500. Johnson, R. (1992). Next Accord May Offer New Engine. Automotive News, 17 (1), 231-240. MacKenzie, J., Roger, D. and Donald, C. (1992). The Going Rate: What it Really Costs to Drive. Washington: World Resources Institute. Pollack, A. (1992). Running Half-Engine to Save Fuel. NY Times, 18 November, p. 16. Sanger, D. (2001). Fuel Efficiency: New Japan Coup? New York Times, July 31, p. C1. Tobias, H., et al. (2006). Chemical Analysis of Diesel Engine Nanoparticles Using a Nano-DMA/Thermal Desorption Particle Beam Mass Spectrometer. Environmental Science Technology 35 (2), 2233–2243. This research paper on Lean Burn Engine Technology was written and submitted by user Arya D. to help you with your own studies. You are free to use it for research and reference purposes in order to write your own paper; however, you must cite it accordingly. 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How Laughing Gas or Nitrous Oxide Works

How Laughing Gas or Nitrous Oxide Works Laughing gas or nitrous oxide is used in the dentists office to reduce patient anxiety and relieve pain. Its also a common recreational drug. Have you ever wondered how laughing gas works? Heres a look at how laughing gas reacts in the body and whether its safe or not. What Is Laughing Gas? Laughing gas is the common name for nitrous oxide or N2O. It is also known as nitrous, nitro, or NOS. Its a nonflammable, colorless gas that has a slightly sweet flavor and odor. In addition to its use in rockets and to boost engine performance for motor racing, laughing gas has several medical applications. It has been used in dentistry and surgery as an analgesic and anesthetic since 1844 when dentist  Dr. Horace Wells used it on himself during a tooth extraction. Since that time, its use has become commonplace in medicine, plus the euphoric effect of inhaling the gas has led to use as a recreation drug. How Laughing Gas Works Although the gas has been used for a long time, the exact mechanism of its action in the body is incompletely understood, in part because the various effects depend upon different reactions. In general, nitrous oxide moderates several ligand-gated ion channels. Specifically, the mechanisms for the effects are: Anxiolytic or Anti-Anxiety EffectStudies indicate the anti-anxiety effect from inhalation of laughing gas derives from increased  activity of GABAA  receptors.  The GABAA receptor acts as the central nervous systems principal inhibitory neurotransmitter.Painkiller or Analgesic EffectLaughing gas reduces the perception of pain by facilitating an interaction between the descending noradrenergic system and the endogenous opioid system. Nitrous oxide causes the release of  endogenous opioids, but how this happens is unknown.Euphoria EffectNitrous produces euphoria by causing dopamine to be released, which stimulates the mesolimbic reward pathway in the brain. This contributes to the analgesic effect, too. Is Nitrous Oxide Safe? When you get laughing gas at the dentists or doctors office, its very safe. A mask is used to first administer pure oxygen and then a mixture of oxygen and laughing gas. The effects on vision, hearing, manual dexterity and mental performance are temporary. Nitrous oxide has both neurotoxic and neuroprotective effects, but limited exposure to the chemical tends not to cause a permanent effect, one way or the other. The primary risks from laughing gas are from inhaling a compressed gas directly from its canister, which could cause severe lung damage or death. Without supplemental oxygen, inhaling nitrous oxide can cause hypoxia or oxygen deprivation effects, including lightheadedness, fainting, low blood pressure, and potentially a heart attack. These risks are comparable to those of inhaling helium gas. Prolonged or repeated exposure to laughing gas can lead to a vitamin B deficiency, reproductive problems in pregnant women, and numbness. Because very little nitrous oxide is absorbed by the body, a person inhaling laughing gas breathes out most of it. This can lead to risks to medical personnel who routinely use the gas in their practice.

Classroom Management and Student Discipline Research Paper - 2

Classroom Management and Student Discipline - Research Paper Example In this essay, I endeavor to engage in reflection particularly in classroom management and student discipline. Towards this end, I will be discussing various dimensions in classroom management and discipline in the context of my own personal experience. To fully engage in reflective practice, I will draw from relevant literature to assess my own practice. In assessing my practice, I will introduce two types of overarching skills: hard skills and soft skills from where specific strategies belong. I will then highlight areas of weaknesses and strengths. In conclusion, I will offer recommendations for my own practice that hopefully, will aid in both my personal and professional growth. In evaluating and reflecting upon my practice of classroom management and student discipline, I find it helpful to distinguish between two types of practices. First, I will refer to as technical strategies or hard skills. The second category I shall label as relationship strategies or soft skills. In the world of work, hard skills often refer to technical skills or procedures often involving machinery and computer protocols. In the classroom, technical strategies are those that involve planning, structuring and organizing systems and procedures to maintain an effective classroom environment. Soft skills on the other hand are the people skills that are employed to build on relationships. In the classroom, certain relationships are important and must be established to reduce disruptions and misbehaviour. Planning would be the key factor in Arrend’s (2009) preventative classroom management strategies. To be able to plan effectively though, it is highly important to know and understand the background of the students, which I usually invest in during the first term of the school year. I have found that this preparation facilitates not only making effective lesson planning

Access and Event Management Essay Example | Topics and Well Written Essays - 2500 words

Access and Event Management - Essay Example Security measures imposed on information systems restrict unauthorized external access. Every access, function, or activity is documented. This information is stored in event logs. These logs are required by the law and also help the organization eliminate certain risks. The documentation provides a framework for easy restoration of systems when they fail. The organization can also use them as evidence against unauthorized access to the systems. ITIL is an automation infrastructure for information exchange and process management. Organizations can share information through this infrastructure. Access management refers to authorization of humans and privileges to a system within or across enterprise boundaries. Business organizations have information that requires protection against unauthorized access. Organizations set up policies that govern those who access information, and what levels they can access. For example, managers can access salary information about subordinate workers, but cannot access that of the chief executive. Companies and executives can grant access to external users for information about the organization. This access is important for knowledge sharing and managing available resources. Every access to information is documented in event logs. These logs keep records of all activities in the information systems. Failures are also documented and used by the system administrators to restore the system. Event logs are stored in servers, computers, and routers. Access management deals with authorization and authentication procedures set up by an organization. Event management is the way an organization keeps records of events regarding the information system. Automation refers to activities that take place without human intervention. The path taken by events from the source to the destination is called event flow. A file containing a list of events that have occurred is called an event log. These logs are stored in a log server or a computer. ITI L is an IT service management infrastructure. It

John Winthrops City Upon a Hill Essay Example for Free

John Winthrops City Upon a Hill Essay Q. What did John Winthrop mean by a city upon a hill? A. When John Winthrop states that â€Å"wee must Consider that wee shall be as a Citty upon a Hill† he indicates that the settlers who are to settle in the New World must hold their business and social and religious activities to a level above reproach, because they will be a test case to a world waiting for their settlement to fail. With â€Å"the eies of all people are uppon us†, the settlers must provide a shining example for others to follow behind. The Puritans believed that the conditions they were living in England had become extremely corrupted and so they left for the New World so that they could find ways to purify themselves and become better Christians. Because the corruption in England could not be fought from within England itself, it would have to be fought by beginning a new and model colony that could be looked upon as a representation of the way a truly Christian society should function in a manner that gives glory to God. Q. What does the author’s writing style tell you about the Puritans who settled in Boston? A. John Winthrop’s style of writing reveals several interesting facts about the Puritans who settled in Boston. First, God and Christian principles are mentioned in nearly ever sentence of this writing. The Puritans believed that their belief in God was the most important aspect of their lives, and so they incorporated that belief into every part of their daily lives. Next, the style of writing represents a simplistic form of expression, using all everyday terms and no obscure language. The Puritans were known to be very plain-spoken individuals. This is not to say, however, that they were uneducated, as this body of work shows clarity of thought as well as a well-constructed call to action to become a city upon a hill. Finally, John Winthrop’s style of writing indicates both a phonetic way of spelling as well as a formality in speech itself. Almost a form of middle English instead of modern-day English, the spellings of various words are much more flowery than the essay itself.

John Miltons On the Morning of Christs Nativity :: On the Morning of Christs Nativity Essays

John Milton's On the Morning of Christ's Nativity John Milton was born in 1608 and died in died in 1674. He was by far the most learned man of his time. He influenced men from the Romantic poets to the American Puritans. Moreover, he relied heavily on the historic Christian doctrine of Calvinism. In the first four stanzas of On the Morning of Christ's Nativity Milton paints a beautiful picture of man's redemption in Christ. First, the first four stanzas of Milton's poem have a distinct rhyme scheme. The rhyme scheme is an adaptation of the rhyme scheme in Spenser's The Faerie Queen. In Spenser's poem the stanza rhyme scheme is ababbcbcc. In Milton's poem the rhyme scheme is ababbcc. The two poems have similar rhyme schemes except Spenser's poem has an extra cb. Second, the most common feature of the first four stanzas is the striking allusion. In the stanza, Milton speaks of the "son of Heaven's eternal King" born of a "virgin mother" bringing "redemption from above." The "King of Heaven" is the Christian God. This is a quote from Daniel 4. The virgin mother is Mary, mother of Jesus. This is a prophecy of the birth of Christ from Isaiah 7 fulfilled in Luke 2. The "redemption from above" is the redemption written of in Romans 3:27. The "holy sages once did sing (they prophesied)" about Christ's releasing the elect of death from the Fall (Genesis 3). These prophecies are in Isaiah 9 and 40, among other places. They were fulfilled in Christ's death and resurrection, and God now works a "perpetual peace" in His elect. Â   The second stanza is much like the first, with allusion as the main feature. The "glorious form" and "light insufferable" are symbolic of God. Exodus 33:20 says no man shall see the face of God and live. Here Milton specifically writes about the Son, Jesus Christ. Milton says He sat in "Trinal Unity" at "Heaven's high council-table." "Trinal Unity" refers to the Christian doctrine of the Trinity. All three are separate and distinct Persons of one God. They are in perfect unity. Finally, Milton says Christ forsook His glory and came "here with us." This is a reference to Philippians 2 where Christ "humbles Himself" and makes Himself in "the form of a servant." Finally, Milton says He chose "a darksome house of mortal clay." This alludes to 1 Corinthians 4:7 where Paul calls men "jars of clay.

Literary Theory and Criticism, and Its Relevance Today Essay

Literary Theory and Criticism and Its Relevance Today Literary criticism is primarily the evaluation of the importance of a particular work or body of work on such grounds as: the personal and/or cultural importance of the themes and the uses of language of a text; the insights and impact of a text; and the aesthetic creation (or, performance) of the text; mainly as these areas are seen to be reciprocally dependent, supportive or inflective. The word ‘criticism’ has ordinary-use negative connotations, and to an extent that is right: for literary criticism is part of he disciplining of dialogue generally and of what is considered literature in particular. One patrols the confines of good writing, admitting or excluding, determining what should be thought about a text, and why, what personal and cultural value should be placed on it. Judgments of significance are not simple, however. They require that one consider what constitutes importance, what the personal and social importance of literature is what the significance of ‘the aesthetic’ is. And they require that one interpret the text. As texts Judged to be of high literary significance tend to be marked by complexity and even ambiguity, and to yield various interpretations, Judgment may eventually require a theory of interpretation, or at least careful consideration to the question of what constitutes, guides, and legitimates interpretation. Theory is the route of understanding what the character of literature is, what functions it has, what the relation of text is to author, to reader, to language, to society, to history. It is not Judgment but understanding of the frames of Judgment. Literary Theory is part of a prevalent movement in the culture which has affected a number of disciplines, occasioning similar disputes in some, a movement which has explored and elucidated the complexities of meaning, textuality and understanding. Literary Theory is not a single venture but a set of interrelated concepts and practices † most significantly deconstruction, post-Althusserian ideological or ‘political’ criticism, post-Lacanian psychoanalytic criticism, New Historicist or ‘cultural’ criticism, some reader-response criticism and much feminist criticism. The aim of this essay is to identify the issues that ground these contemporary literary theories. There have always been literary theories † about how literature works, what connotation is, what it is to be an author and so forth. The essential interpretive practices in force and in power in the academy which are being challenged by Theory were themselves ground-breaking, theory-based practices which became the norm. The two main crucial practices in the mid portion of the century have been the formalist tradition, or ‘New Criticism’, which sees a text as a omparatively self-enclosed meaning-production system which develops gigantic signifying power through its formal properties and through its conflicts, ambiguities and complexities, and the Arnoldian humanist tradition exemplified most clearly in the work of F. R. Leavis and his followers, which concentrates evaluatively on the capability of the author to represent moral experience concretely and engagingly. Many readers have in practice combined the principles and methodologies of these

How Poverty in Zimbabwe Has Changed over Time? Essay

Poverty can be understood as the inability to meet a variety of basic needs and entitlements, through a lack of income, access to resources or empowerment. Poverty at a national scale is complex and is caused by an array of factors including many generated within the country but also others that are caused by external factors (figure 1). I will examine the internal and external causes of poverty in the landlocked Southern Africa state of Zimbabwe (figure 3). In the last century Zimbabwe has experienced massive economic and social change. Once Africa’s 2nd biggest economy, it is now ranked 15th(figure 3). Overall Zimbabwe ranks 173rd in the world in terms of HDI (Human Development Index), 153rd in the world for GDP and ranked 5th in the world for the lowest life expectancy[1], indicating significant poverty especially when compared to the relative developmental success of other southern Africa states (figure 5). When considering levels of development, countries can be placed on Rostow Stages of Economic Development[2], the majority of countries move up the stages from experiencing economic growth. However Zimbabwe has slipped back down the Stages of Development; early 1970 it was experiencing ‘take off’ & ‘acceleration’ however in recent years it is now at ‘pre-development’ (see figure 4), a ‘step back’ in economic growth development. An external cause of poverty in Zimbabwe is the geographic position. They are a landlocked country; they have no access to the seas for trading, limited border crossings and they are dependent on other countries for trade (figure 6). This leads to huge transport costs and inadequate infrastructure, on average a country which is landlocked experiences 60% less volume of trade plus it limits their economic growth and this external factor is a major cause of poverty[4]. Also, Zimbabwe has experienced severe drought in the past few years, it only has 8.32%[5] arable land and climate change is threatening to lessen their available land further. Arguably, these effects are already being observed in regions of Zimbabwe as the physical climate of the country has changed largely over the last three decades with the worst drought being experienced in 1991. However in recent years failure of the 2004-2008 rains reduced crop production by an estimated 95%, this has impacted heavily on Zimbabwe’s productivity, reducing both commercial trade to earn income and subsistence poverty. In years of severe drought the GDP growth was negative indicating a shrinking economy (figure 8), such unreliability of production limits their growth (figure 5). The unreliability of their economy stems from the external factors which also lead to national scale poverty through a lack of income, and an inability to meet basic food security needs which Maslow includes at the very base of his Hierarchy Of Needs (appendix 2), therefore pushing huge sections of society into poverty. Despite this geographical and climate disadvantage, I feel that poverty in Zimbabwe was serverly exacerbated as a result of political policy, this internal factor has had greater effect on the extent and depth of poverty experienced. In 2000 Robert Mugabe seized thousands of white-owned farms in an ongoing and violent campaign to reclaim what they say was stolen by settlers[6]. The land reform had a massive impact on Zimbabwe’s food production; in 2005 they were ranked 177th out of 182 compared to South Africa (Zimbabwe neighbouring country) who are 82nd (figure 3). This portrays a massive problem as South Africa share the same climate and land features but are completely in the opposite spectrum in terms of food production. The land reform in 2000 led to the breaking up of farms, two thirds of the farms were given to ordinary people on low-incomes. The remaining one-third included civil servants (16.5%), former workers on white-owned farms (6.7%), business people (4.8%) and members of the security services (3.7%)[7] (figure 6). Arguably, these effects have been caused due to the loss of the commercial white farmers, they knew how to produce high yields along with the high quality and most importantly they knew how to add value to their goods. I believe the impact of the land reforms is evident in the food crisis 2007-08 due to the land seizures, in some areas crop production reduced by 95%. Not only did Zimbabwe lose a large section of its agriculture sector, it diminished its community cohesion and provision of services throughout communities across the country (appendix 1). It lost its community support network and witnessed a mass exodus of its economically active society, causing intellectuals to le ave the country causing brain a drain and further undermining income earning potential. The land reform campaign in 2000 was also thought to have contributed to the AIDS epidemic; over 33% of the population are HIV positive (3rd largest in the world). As farming communities were disrupted, the economy deteriorated and many doctors left the country causing reduced access to healthcare. Many farmers were forced to move to different areas and in some cases families were separated, this resulted in sexual networks developing and an increase in the risk of HIV transmission. In 2009 the HIV prevalence in adults aged 15-49 was 14.3% causing the most economically active age group to have limited income earning opportunity as illness made work more difficult to continue causing income poverty (appendix 1).This is compared to South Africa where 15-49 prevalence was only 7% in 2009. Foreign companies are also reticent to invest in a country with such an unreliable workforce, again causing GDP limitations and national level poverty. But internally controlled land reforms would never have been needed but for the external factor of the apartheid regime established by Ian Smith who was president of Rhodesia (Zimbabwe) from 1964. Britain who had colonised parts of central Africa, wanted to keep hold of Rhodesia (Zimbabwe) because it was known as the bread basket of Africa, they believed it had great potential[8]. However Ian Smith declared independence under white minority rule, sparking international outrage and economic sanctions. Additionally he completely radicalised the farming community when he introduced apartheid. He evicted the numerous black farmers and put the fewer white famers in control of the huge hectares of land because they were commercial farmers and knew how to produce high quality and high yields[9]. This led to a division between poor blacks and wealthy white people causing inequality and an increase in relative poverty. This eventually led to civil war and resulting in Ian Smith being over thrown by the British Government in 1979; Robert Mugabe was elected as the new prime minster in 1980. His chaotic attempt to eradicate the apartheid regime ultimately ended up in a land redistribution campaign, which began in 2000 and caused an exodus of white farmers, crippled the economy, and ushered in widespread shortages of basic commodities. The economy of the Zimbabwe shrunk by 154.4 (figure 8). Although it could be argued that this is an internal factor as governance is part of the domestic jurisdiction of the country meaning that changes and alterations to policy and leadership should be internally controlled, in the case of Zimbabwe, these factors cannot be separated. Governance in Zimbabwe was controlled externally via colonial rule, and even after the decline of colonialism, for a significant period, the leader of Zimbabwe was externally decided and was the case of the appointment of Mugabe. It is undeniable that the internal governance of the country under Mugabe has been of paramount importance with regard to affecting poverty in Zimbabwe on a national scale such as failure to act despite everything going wrong, for denial of HIV, and ignoring of land reforms impacts on productivity, lack of free speech so intellectuals leave causing brain drain. His reign can be summarised as; life expectancy in fell from 62 years in 1990 to 36 in 2006[10]. He has been accused of policy myopia many times. From all the information and statistics described in this report it can be concluded that internal factors have had the most devastating effect on Zimbabwe as a whole, such as the land reforms which led to a spiral of decline for the country, especially as it could have been avoided. The devastation of the land reforms is still being felt in certain parts of Zimbabwe today; the loss of intellectual people will be the hardest to recover from for Zimbabwe. They are the group of people what will promote economic growth and re-stabilise the economy. They attract investment from Trans National Companies for their knowledge and their enterprise; they act as a multiplier effect for an economy. However this will take generations to re build. External factors of poverty such as their geographic location and climate have had impacts such as restricting them in trade and production. But comparison with neighbouring countries such as South Africa indicates they significantly outperform Zimbabwe. This leads us to believe internal factors have had a great impact on causing poverty in Zimbabwe (figure 4). However, as has been shown it is impossible to separate internal and external factors completely as they feed into one another. A challenging collection of external factors such as climate, location and in particular colonial legacy under Ian Smith, created a situation where poverty was a real danger. However post-colonial, strong and positive governance could have reduced poverty. Unfortunately in Zimbabwe, Mugabe’s regime exacerbated the poverty situation. Once in poverty, you’re in a vicious cycle of decline (poverty trap[11]). The poverty you’re in prevents you from getting out, it counteracts you from taking positive actions[12]. As a result of high unemployment figures and a spiral of decline for the economy, those who had been educated left the country in hope for a prosperous future. This can be referred to as the ‘brain drain’[13]. ———————– [1] Zimbabwe facts https://www.cia.gov/library/publications/the-world-factbook/geos/zi.html [2] http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0097893.html [3] http://hdrstats.undp.org/countries/data_sheets/cty_ds_NAM.html [4] http://www.palgrave-journals.com/ces/journal/v45/n4/full/8100031a.html [5] http://www.wordtravels.com/Travelguide/Countries/Zimbabwe/Climate [6] http://www.bbc.co.uk/news/world-africa-14113618 [7] http://www.bbc.co.uk/news/world-africa-11764004 [8] http://www.bbc.co.uk/news/world-africa-14113618 [9] http://www.bbc.co.uk/news/world-africa-15919538 [10] http://www.nytimes.com/2009/01/23/opinion/23iht-edmugabe.1.19632133.html [11] http://tutor2u.net/economics/content/topics/poverty/measuring_poverty.htm [12] http://www.unmillenniumproject.org/documents/BPEAEndingAfricasPovertyTrapFINAL.pdf [13] http://www.globalissues.org/article/599/brain-drain-of-workers-from-poor-to-rich-countries

Definition and Examples of Estuary English

Definition and Examples of Estuary English Estuary English is a contemporary variety of British English: a mixture of non-regional and southeastern English pronunciation, grammar, and vocabulary, which is thought to have originated around the banks of the River Thames and its estuary. Also known as  Cockneyfied RP and Nonstandard Southern English. In some of its features (but not all), Estuary English is related to the traditional Cockney dialect and accent  spoken by people living in the East End of London. The term Estuary English was  introduced by British linguist David Rosewarne in 1984. Examples and Observations Emma Houghton[Paul] Coggle [lecturer in modern languages at the University of Kent] predicts that Estuary English (think Jonathan Ross) will eventually take over from RP. Estuary already predominates in the South East and has apparently spread as far north as Hull.John CraceNot so long ago some academics argued that estuary English (or non-standard southern English, as linguistics experts prefer to call it) was, thanks to TV shows such as EastEnders, slowly taking over the whole country and that some northern accentsparticularly Glaswegianwere being diluted. But [Jonnie] Robinson [curator of English accents and dialects at the British Library] points out that this latest version of the imperialist south has turned out to be a false alarm.There is no doubt the London dialect we have come to call estuary has spread out across the south-east, he says, but research has shown that northern accents and dialects have withstood its spread. Characteristics of Estuary English Linda ThomasFeatures of Estuary English include the glottalisation (replacing t with a glottal stop, as in butter pronounced as buh-uh), pronunciation of th as f or v as in mouth pronounced as mouf and mother pronounced as muvver, the use of multiple negation, as in I aint never done nothing, and the use of the non-standard them books instead of those books.Louise Mullany and Peter StockwellOne popular explanation for the development of Estuary English put forward by linguists including David Crystal (1995) is that RP is going through a process of casualisation at the same time as Cockney speakers are experiencing social mobility and thus moving away from the most stigmatized variety.Estuary English is seen by sociolinguists as evidence that a process known as dialect leveling is taking place, as certain features from this southeast variety have been witnessed spreading across the country...From a grammatical perspective, Estuary English speakers will omit the -ly adverbial ending as in Youre moving too quick . . .. There is also usage of what is known as the confrontational tag question (a construction added to a statement) such as I told you that already didnt I. The Queens English Susie DentJonathan Harrington, Professor of Phonetics at the University of Munich, conducted a thorough acoustic analysis of the Queens Christmas broadcasts, and concluded that Estuary English, a term coined in the 1980s to describe the spread of Londons regional pronunciation features to counties adjoining the river, might well have had an influence on Her Majestys vowels. In 1952 she would have been heard referring to thet men in the bleck het. Now it would be that man in the black hat, the article notes. Similarly, she would have spoken of . . . hame rather than home. In the 1950s she would have been lorst, but by the 1970s lost.

Business Theory Comparison Essay -- Business

2. A solely profit based business model would define stockholder theory in which the paramount goal of the business is to produce the most earnings for their stockholders. Prioritizing profits over a positive public image Goldman Sachs becomes an excellent example of stockholder theory. Entitlement and Desert theory can be used to support stockholder theory. 3. When stock is purchased in a company that person is entitled to the profits or loses that those shares in stock are worth, entitlement theory supports stockholder theory in which stockholders are entitled to reap the benefits of stock as long as it has been purchased justly. Desert theory states that if the action is morally right, then the person should be able to reap the benefits and take the loses. Stockholder theory supports this as being a stockholder in a company is morally accepted, but if an unethical act is preformed in buy or selling stock Desert Theory would not support Stockholder Theory. When Martha Stewart was arrested for insider trading she demonstrated that doing an in-moral act voids Desert Theory. 4. Stockholder theory revolves around pleasing one stakeholder, the stockholders; Stakeholder Theory broadens up that view to try and please all of the stakeholders. The Ben and Jerry's company was a good example of Stakeholder Theory as they kept the pay differences between the CEO and lowest paid worker to only ten fold. Utilitarianism and Virtue Ethics Theory can be used to suppon company and benefit from the earnings that stock can bring. 9. Stockholder and Stakeholder Theory being vastly different become the extremes on a business ethics spectrum, between these lie the Kantian Minimum view and Rawlsian Position. Kantian Minimum view lies closer to Stockholder view, but the main difference is to not treat any stakeholder group as a mere means to a end. The Rawlsian Position lies closer to Stakeholder view in which life is not fair, but if you did not have knowledge in what position you would be in, you would choose the situation that would benefit your best interest. Upon overview of the four views the Rawlsian Position would be most ethically justified. It is benefiting from net happiness in which there is no vast difference between stakeholder groups, and there is also room for promotion between groups as all stakeholders are not even.

Leading in Service Neutrality' (Chick-fil-A) Essay

Leading in Service Neutrality' (Chick-fil-A) - Essay Example Our business has been embedded on the foundation reputation based on trust and confidence from our customers. Similarly, the historical good performance of our business has been enhanced by the emphasis on quality service provision to our customers. We therefore need to strengthen our reputation by endorsing a comprehensive code of ethics for our company. This will ensure that certain gaps in various aspects of service delivery are addressed effectively. Since the success of our business is reputation dependent, we have a responsibility of ensuring that our reputation is fully protected. We are demanded to carry out our underlying business with integrity and ensure that our actions conform to our customers’ expectations. The ultimate solution to this is the adoption of the code of conduct that will guide us in the achievement of our dream. The top management is committed to compliance to this code of ethics. The owners of Chick-fil-A have decided to adopt his code is to incorporate professional ethics in the daily activities of our company. Professional ethics ensures quality service provision, conducting business with utmost integrity and the ultimate treatment of our customers with respect they deserve. Consequently, the reputation of the business shall be enhanced. The code of ethics is thus intended to enhance the reputation of the business, a factor that acts as a prerequisite to the success of any profit making organization (Walker, 2008). Code of ethics is a document that clearly defines that accepted behavior of employees in an organization and the relationship that exist between the business and its external environment. The code of ethics outlines the acceptable behavior of the employees while serving the customers. It provides for the actions against employees who violate such set codes of ethics. Within the