Friday, December 27, 2019
Iran Before and After the Revolution Essay - 794 Words
Iran before and after Revolution: Textual - Visual Metaphors of Graffiti during Revolution Introduction During the prehistoric period , human was creating markings on the surfaces of the caves and , since the down of civilization , on the walls of ancient structures Although in certain cases motivations to produce such marks are covered by mystery , wall paintings , and engravings definitely serve as factual evidence of humans presence along various locations . The appearance and production of techniques of graffiti have been varying throughout decades , but cave paintings of prehistoric period , ancient engravings , or contemporary graffiti of today have at least one thing in common , and that is : theyre all humanâ⬠¦show more contentâ⬠¦Therefore , in the process of research , which concerns graffiti related issues , it is a matter of importance to take insight in to the past to be able to comprehend the present . For instance ,there is a research by L.Iyer , which demonstrates significance of setting parallel between prehistoric cave paintings and contemporary gr affiti , particularly a case of wall writings in paris , inflamed by events of May ,1968 . Moreover , as humans creation , graffiti at any stage of history presents a fertile ground to interpretation of underlying meanings , conceptions , and messages whether obvious or hidden . Regarding to prehistoric graffiti , there are plenty of studies by such researchers as Breuil , Coppens , Clottes and Lewis - Williams , Mullen , and many others . Apparently ,moving from prehistoric time since now , graffiti has undergone a complex process of development under impact of various factors ,like growth of civilization , advancing technologies , public shifts, and socio - political events. In fact contemporary graffiti presents a great range of types and styles , each differ in technical aspects of production from one side , and conceptual approaches from the other . Contemporary graffiti may provide a great deal of data on social climate of any specific locale Indeed , contemporary graffiti, its types andShow MoreRelated Iran Before and After the Revolution Essay2121 Words à |à 9 PagesIran ââ¬â Before and After the Revolution The Islamic Republic of Iran, formerly known as Iran or Persia, was crowded with a young generation looking for full freedom against the Shah. Persia, once as a powerful country with vast oil resources, soon became a vulnerable nation, ready to accept a new leader to guide them. The people were ready for change, but were the changes they got the changes they were looking for. The people wanted freedom against the shah, (For generations Iran was ruled by Kings)Read MoreThe Iranian Revolution 732 Words à |à 3 Pagesdetermine whether a revolution is successful or not. This is not the case for Iran. Since the revolution, Iran has been economically, politically, and socially unstable. With an economy dependent on oil, a natural source whose production is unpredictable, stability is simply unattainable. With the same leader for a long period of time, not much can change politically. Oppositions and revolts can happen and disrupt the social lives of Iranian citizens. Although the Iranian Revolution was politically successfulRead MoreThe Islamic Republic Of Iran1267 Words à |à 6 Pages1960s, the newly reinstated Shah of Iran launched a series of reforms called the White Revolution. The reforms were intended to modernize Iran. Instead, they led to an increase in the Shahââ¬â¢s power and a greater wealth gap. In response to the Shahââ¬â¢s corruption, riots broke out in the fall of 1978. The Shah went into exile in January of 1979. In April of 1979, a referendum created the Islamic Republic of Iran. Ayatollah Khomeini, the figurehead of the Revolution, became the Supreme Leader. The newRead MoreThe Underground Music Scene Reflect The Socio Political Situation Of Contemporary Iran?1493 Words à |à 6 Pagesmusic scene reflect the socio-political situation of contemporary Iran?ââ¬â¢ A review of literature A reoccurring observation made in literature focused on music in contemporary Iran, is the challenge music has faced since the Islamic revolution of 1979 and the subsequent establishment of a theocratic state . Ghazizadeh (2011) argued that music is one of the most controversial issues in Islam and so after the victory of the Islamic revolution, which promised a return back to traditional Islamic norms andRead MoreThe History And The Culture Of A Country1526 Words à |à 7 Pagesoperations. For some countries, this can be easier than others can. Though its history runs extremely deep, Iran is a relatively new country whose revolution was less than four decades ago. During the time leading up to its revolution, Iran had many different leaders and rulers that have played a hand in how the culture of Iran is today, which makes trying to understand it difficult. Iran is made up of many different classes that all have ways of operating based on different factors and when interactingR ead MoreU.s. And Iran Relations1452 Words à |à 6 PagesU.S. and Iran used to have a great relationship back in the day. President Jimmy Carter even spent New Year s Eve in 1977 with the Shah, and toasted Iran as an island of stability in one of the more troubled areas of the world.(Bakhtavar) This just goes to show how close the two countries were at the time. But all that changed later into the 1970ââ¬â¢s when a series of unfortunate events eventually lead to the complete deterioration of US and Iran relations. These events shifted U.S. Iran relationsRead MoreThe Iranian Revolution And English Civil War1238 Words à |à 5 Pagesdifferent times throughout history, looking back today the Iranian Revolution and English Civil War were very much alike. Both revolutions had a lot to do with the leaders of the time and both immediately resulted in turmoil. The Iranian revolution and English Civil war had similar causes however the English Civil War was more successful in ensuring l asting democracy. Firstly, Mohammed Reza Shah Pahlavi was the extremely isolated leader of Iran who was extremely concerned, by any means necessary, with consolidatingRead MoreLasting Effects of the Islamic Revolution1595 Words à |à 7 Pages Lasting Effects of the Islamic Revolution of 1979 A) Plan of the investigation What effect did the Islamic revolution have on the country of Iran and itââ¬â¢s international relations? This is a very broad question so it much be asked and answered for many different levels of society. Looked at this way this question is actually collection of questions. What effect did the Islamic revolution have on the wealthy within the country? What effect did it have on the poor? What affect did it have on the governmentRead MoreTaking a Look at the Iranian Revolution892 Words à |à 4 PagesRevolution means to bring a change in something. In politics, it basically means to over throw a government with another government system. There are many revolutions took place in history and the Iranian revolution was one of them. Iranian revolution brought a big change in the Iranian society by over throwing the Shahââ¬â¢s government and establishing a new system called Islamic republic. Iranian revolution has also a lot of impact on Islamic countries. The Iranian revolution wa s the one of the mostRead MoreThe Iranian Revolution1494 Words à |à 6 Pagesfriendship between the Jews and the Persians. During Reza Shahââ¬â¢s reign in Iran, Israel and Iran cooperated on many levels as they were united by a common enemy and shared interests. However, there has always been a substantial ideological split between the Iranian theocracy focused on the triumph of Islam, and a Jewish state dedicated to the security of its people. Thus, these close relations ended abruptly after the 1979 Iranian Revolution when Ayatollah Khomeini, a leader devoted to traditional Islamic
Thursday, December 19, 2019
Social Disorganization Theory Of Rural Youth Violence
After examining the results from their study, they concluded that single-parent homes, welfare use, poor parental supervision, and hyperactivity had strong correlations for delinquency in African American youths than that of just neighborhood context alone. Wanting to extend the theory of social disorganization and crime beyond the scope of large urban cities, D. Wayne Osgood and Jeff M. Chambers released their study, Social Disorganization Outside the Metropolis: An Analysis of Rural Youth Violence, in order to ââ¬Å"assess the generalizability to this setting of the social disorganization theory of crime that has been developed and tested in urban communitiesâ⬠(Osgood Chambers, 2000). They hypothesize that rates of juvenile delinquency is positively related to residential instability, ethnic heterogeneity, family disruption, economic status, population density, and communities that are closer to urban areas (Osgood Chambers, 2000). The sample contained 264 counties across Florida, Georgia, South Carolina, and Nebraska that had populations ranging from 560 people to 98,000. The study was measured by the number of juveniles arrested (ages 11 through 17) between 1989 through 1993. They analyzed the arrests for homicide, robbery, aggravated assault, forcible rape, simple assault, weapons offenses, and the Uniform Crime Report (UCR) violence index. Residential instability was measured by the number of times a person has moved from a home within the past five years. EthnicShow MoreRelatedThe Social Of Crime And Criminal Behavior882 Words à |à 4 Pagesthroughout the last two centuries. Many theories, such as the social disintegration theory, have been hypothesized to explain the effects of certain neighborhoods on crime. In addition, other theories have been presented, such as the collective efficacy theory, which serve to explain the reasons for reduced crime in other neighborhoods while presenting possible solutions to solve the problem of crime in society. This paper will explore these two theories and how they not only help explain but alsoRead MoreFactors Contributing For Criminal Activity Among African Americans1587 Words à |à 7 Pageshad poor home conditions, poverty, and bad influence on the cityââ¬â¢s youth (Gabbidon,2015). As stated in, Criminological Perspectives on Race and Crime by Shaun L Gabbidon, Social Disorganization is the breakdown in equilibrium forces, that creates a decay in social structure so that old habits and forms of social control are no longer effective (2015). There are many studies that have displayed support of Social disorganization and its link to Juvenile delinquency. Although, there has been manyRead MoreSocial And Social Learning Theory1553 Words à |à 7 PagesThe Social Learning Theory is best defined as crime is learned through associations with others who commit crimes. Juveniles are very impressionable or gullible, wherein they want to be popular or part of the in-crowd or c lique. In comparison to the 1970ââ¬â¢s versus today, juveniles are emulating criminals depicted on television not just through associations. Consider the current state of technology, specifically the internet and websites such as ââ¬Å"You Tube.â⬠With respect to crime and juvenile delinquentsRead MoreDefinition Of Differential Association Theory917 Words à |à 4 PagesSutherland theory has been around for over 30 years which is one of the most popular theories that there is in criminal behaviors. The differential association theory is considered to be one of the most and best formulation of theory of criminality, holds, in essence, that criminality in learned interactions from others through a way of communication (Cressey, 1954). Sutherland he explains how individual behaviors are learned behaviors and that people are not born to be criminals. With this theory SutherlandRead MoreThe Between The Expansion Of Urbanized Social Environments And Its Influence On Young Offend ers1446 Words à |à 6 Pagesrelation between the expansion of urbanized social environments and its influence on young offenders. This research article will define what the relation is between juvenile delinquency and criminality within urbanized societies. Factors that influence this perception is based on the connections between social interactions through family, peers, and the overall community, including personal characteristics of the offender as well. This is determined by anti-social behavior or lack of control due to aggressiveRead MoreThe Theory Of Social Disorganization893 Words à |à 4 Pages1942, the theory of social disorganization was developed by two criminology researchers by the name of Clifford Shaw and Henry D. McKay. Social disorganization theory focuses on a person physical and social environments are what causes their behavioral choices. This means that if a person is placed in a neighborhood where there is a high crime rate, or the neighborhood is not dy namic, this can cause them to participate in such crimes, or make the wrong behavioral choices within the youth. In the ruralRead MoreTheories Of Crime : Robbery1514 Words à |à 7 PagesTheories of Crime ââ¬â Robbery Introduction Understanding patterns and motivation of crimes is important for solving the mysteries surrounding them. In this sense, theories can be used to explain crime phenomena and answer the questions involved. Through theory, important aspects surrounding a crime can be discovered. Therefore, understanding the patterns and motivations of crimes can be helpful towards preventing their occurrence. This paper focuses on robbery as a type of crime. The two theoriesRead MoreSocial Theories: Gang Violence1704 Words à |à 6 Pagesï » ¿ Social Theories: How It Relates to Gangs Gang Violence By Stuart Brown Criminology is a complex subject chock-full of theories that attempt to explain crime and criminal behavior. Each base theory has several branches of theory which expand upon and compliment their predecessors. Even some of the sub-theories have branches of theories. This paper is going to discuss two social theories; social structure and social process. It is also going to cover someRead MoreSocial And Social Structure Theory1675 Words à |à 7 PagesSocial Structure Theory Introduction The social structure theory deliberates delinquency as a gathering of the personââ¬â¢s dealings with numerous groups, organizations, and process in the society. Any person irrespective of their prominence in life is likely to become delinquents if they continue with negative social affiliations. Every aspect of the society, social and economic must be viewed using the social structure theories to find the cause of crime and deviance. The social structure theoriesRead MoreThere Are No Children Here By Alex Kotlowitz Essay1933 Words à |à 8 Pagesand Groves (1989), social disorganization refers to ââ¬Å"the inability of a community structure to realize the common values of its residents and maintain effective social controlsâ⬠. Many aspects in the book exemplify how neighborhood factors, social controls, and community factors have impacts on crime. The book exemplifies how neighborhood disadvantage can lead to informal social controls, which in turn produces crime. Due to these factors, social disorganization is the best theory to explain the crime
Wednesday, December 11, 2019
Personal Statement for Admission in Aviation Management
Question: Discuss about thePersonal Statement for Admission in Aviation Management. Answer: Personal Statement My admiration for aviation management dates back in high school where I used to aid my colleagues in tackling issues affecting their studies. I used to engage them in discussions to devise the best ways of dealing with their challenges. This is where I discovered and developed my skills in assessing and understanding challenging situations which require critical thinking and precise decision making. Furthermore, it made me develop multidimensional approaches when addressing any problem. This is because I believed that there is more than one solution to a situation. With time, I realized that I needed to exercise my skills in solving more complex issues. The only opportunity for me to achieve this was through pursuing a career in business and innovation. This is because the modern world relies on business activities for its survival. Furthermore, the aviation environment demands individuals who are critical thinkers and who are not afraid to face challenges and completion. Throughout my undergraduate studies, I have advanced my critical thinking and decision-making abilities. Most importantly, I have streamlined these abilities toward business decision making. This is through studying factors affecting decision making in business context. I come to appreciate that the aviation world is unique from all other fields. This area requires more than just critical thinking. It requires one to complement his critical thinking capabilities with business and management principles. Furthermore, it demands effective and efficient communication skills with close attention to the current cultural diversity. I am specifically interested in pursuing master's in aviation management because I believe that I have all the resources to excel in this area. This is a sector which requires great assessment, comprehension, and decision-making skills. This is because it involves dealing with issues in the aviation field before, when, and after they occur. This indicates that aviation management requires both preventive and reactive measures in addressing management issues. Since it involves addressing issues which impact on the aviation sector, it requires proper planning, developing appropriate methods and excellent communication within a firm. I believe that I have the ability to handle all these responsibilities efficiently. Apart from being an effective communicator, I am also a good team player who respects other people opinions. However, I cannot be a full aviation manager without acquiring the required advanced academic skills in this discipline. This is the reason I am applying for a chance in your institution. I am aware of the high reputation your institution have in offering training on this subject. My interaction with some your former students has enabled me to understand how the institution operates. They have highlighted me on the various requirements you demand from your students including your insistence on quality academic research. Furthermore, the institutions provision of modern technology and facilities will enhance my understanding of new concepts and progress my research skills. My goal is to gain more knowledge on how to handle both the existing and emerging threats in the aviation sector. I believe that your institution is the best place to help me achieve this goal. Finally, I believe that I will contribute positively to the development of your school through research, innovation, and in teraction with other members.
Wednesday, December 4, 2019
Operations Management of KFC
The change in ownership of KFC has translated into several and consistent transformations in the organizational operations since the year 1964, when it was first sold out by Colonel Sanders. In the year 1971, KFC was bought by Heublein, Inc who eventually sold it to R.J Reynolds in 1982.Advertising We will write a custom report sample on Operations Management of KFC specifically for you for only $16.05 $11/page Learn More Due to Reynoldsââ¬â¢ laxity in its management, it again sold it to PepsiCo in 1986. PepsiCo was on a mission to expand its chain of restaurants. In addition to KFC, it also acquired Taco Bell and Pizza Hut and introduced new management style with a different corporate culture. With a background in marketing of fast foods, PepsiCo easily embraced the selling of snack food and soft drinks. It is against this backdrop that the company engaged in an operational reorganization plan in 1985. This saw its non compatible units liquidated fol lowed subsequent concentration on restaurants, snack foods and soft drinks. The result of this included a growth in the operations of KFC as demonstrated by the 2,258 restaurants in sixty eight foreign countries under its management. This makes KFC to be ranked among the tops in the world, in terms of chicken sale and quick service chain. Analysis The operations at KFC present a myriad of strengths, weaknesses, opportunities and threats. This could be better understood through investigating the SWOT analysis (Christopher McDonald 1995, p. 34). Opportunities These are the external conditions that a company can take advantage of to exploit in a bid of enhancing its performance (Fitzsimmons Fitzsimmons 2006, p. 23). KFC has several opportunities, which it can benefit from to increase its net worth. There exists a large unexploited customer base across the border with Mexico, which apparently has a population of 91 million. KFC can take advantage of this due to its close proximity to the U.S and less competition. The closeness of the Mexican market to the U.S ensures that transport costs are lessened. It is also important to note that very few U.S companies are present in the Mexican market as compared with the European companies (Madura, 2009, p. 176). This offers good incentives for KFC to invest there in order to exploit the minimal competition that currently prevails there (Knolmayer, Mertens Zeier 2002, p. 27).Advertising Looking for report on business economics? Let's see if we can help you! Get your first paper with 15% OFF Learn More In addition, there exist favorable exchange rates between the U.S and Mexico due to the Peso devaluation (Thompson, 2001, p. 382). KFC can grab this opportunity as it seeks to eliminate risks of investing in Mexico. While there in Mexico, KFC also stand to gain from cheap importation of raw materials from the U.S due to the prevailing favorable rates of dollar conversion into peso. Still in Mexico, the passag e of the new franchise laws in 1990 ensures that the technologies that are transferred into the Mexican market are protected. KFC can exploit this new law by opening up as many franchise stores as possible to tap the market. KFC can also exploit the need to supply products closer to the customers rather than at the shopping malls alone. Places such as school, hospitals and entertainment spots and even on traffic jams normally contain demanding customers that are in need of soft drinks and snack foods. This helps to save time for their clients besides ensuring that they obtain the foods at their convenience (Lewis Slack 2003, p. 17). Threats Just like any other company, KFC also faces a number of threats that are likely to imperil its position in its current business standing. Some of these threats can negatively impact on its profits. The major threat currently is the congestion of fast food restaurants in the U.S market. The National Restaurant Association reports that the market in the U.S is saturated with fast growing number of restaurants. This has caused a consistent increase in competition within the industry (National Restaurant Association 2012). Moreover some restaurants have resorted to dealing in substitute products that sell fast. For instance, McDonaldââ¬â¢s adopted McChicken Sandwich, just as Jack in the Box brought in chicken and teriyaki with rice. Meanwhile Dominoââ¬â¢s introduced chicken wings as Pizza Hut gave a shot at marinated, rotisserie-cooked chicken. These developments present real threats to KFC since they also come with new brands that are more enduring to customers. The recent past few decades has seen a dramatic change in the preference of consumers. This has promoted companies to keep on changing their brand images to suit the customersââ¬â¢ preferences. In this quest, important aspects of the products could be lost. In its bid to satisfy the ever changing customer preferences, KFC has undergone several changes that ar e tailor made to correspond with the clientââ¬â¢s needs (Bidgoli 2010, p. 56).Advertising We will write a custom report sample on Operations Management of KFC specifically for you for only $16.05 $11/page Learn More As it undergoes its endeavor to exploit the Mexican market, KFC has had to confront a number of challenges including dealing with very complacent labor force. Although labor costs are relatively cheap in Mexico, most labors are lazy, unreliable and absent themselves from duty frequently. Mexico also experiences frequent security threats posed by drug gangs. This has made the operations of KFC in that country insecure due to constant fears of attacks by the drug lords and gangs (Davis et al. 2008, p. 181). Strengths These are the internal conditions that are available within the company that makes a company stands a better ground of pursuing its goals effectively. For the KFC, they pride themselves as being the first chain to ever give a s hot at a fast food industry. This provided them with a niche above the rest besides giving them a shot in the arm especially when it comes to advertisements. Moreover, being the earliest entrant into the industry has allowed them to build on a brand name and firmly anchor their roots within the business. This has served to enhance their reputation and recognition. The acquisition of KFC by PepsiCo was another shot in the arm. This is because PepsiCo was already experienced in operational management and therefore KFC received the much needed operational organization under PepsiCo (Needle 2010, p. 63). The company also boasts of excellent loyalty from its employees. This is a tradition that was created by the companyââ¬â¢s founder, Colonel Sander. This devotion of employees has in extent led to the provision of quality services to customers, which include clean and hygiene restaurants, improved customer relations and high quality services, which are served in fast and friendlier ma nner (Knolmayer et al. 2002, p. 42). Weaknesses These are the conditions that are found within the internal structure of a company and have potentials of derailing a companyââ¬â¢s progress. KFC has apparently undergone change in ownership as many times as possible. This has in essence led to confusion in the corporate direction of the company. The company has also been characterized by delays when it comes to adoption and subsequent marketing of new products. For instance, at the time when McDonaldââ¬â¢s was developing McChicken, KFC still retained its age old KFC sandwich. Incidentally customers are more likely to be endured to innovative companies than non innovative ones (Hensher 2001, p. 38). The founder and manager of KFC preferred a laid back approach of management, which served to earn his employeesââ¬â¢ devotion to the company. However, when the company was bought by PepsiCo, a more aggressive form of operational management was adopted. These two conflicting culture s of management resulted in confusion of employees. In addition, the sale resulted in a change in the top management of the company. This change altered the operational organization of the company (Hillier Hillier 2010, p. 71).Advertising Looking for report on business economics? Let's see if we can help you! Get your first paper with 15% OFF Learn More Evaluation and Summary The SWOT analysis has been used to evaluate the effectiveness of the operations management of the KFC. They provide adequate tools and equipments for analyzing the modalities of managing the operations of the company in addition to offering information on areas of key interest. From the SWOT analysis, it is evident that the company has undergone a number of transformations in terms of ownership and management. Some of these changes have been accompanied by equal measure of challenges that the company has been able to exploit for its own benefit. Others however have brought with them outstanding threats that calls for fresh thoughts and approaches in decision making (Lewis Slack 2003, p. 69). One important oversees investment destination for KFC is the Mexico. This is attributed to the fact that it has minimal competition, high customer base, favorable exchange rates due to the devaluation of the of the peso and low labor costs. However, these are not conditio ns which are permanent. A change in any or all of these conditions might result in subsequent disruptions in the operations of the KFC. It is against this backdrop that KFC should explore other market destinations and seek other strategic alternatives. References Bidgoli, H 2010, The handbook of technology management: supply chain management, marketing and advertising, and global management, John Wiley and Sons, NewYork. Christopher, M McDonald, M 1995, Marketing: an introductory text, Macmillan Business, Salt Lake. Davis, B, Lockwood, A, Alcott, P Panterlidis, L 2008, Food and beverage management, Elsevier, Salt Lake. Fitzsimmons, J Fitzsimmons, MJ 2006, Service management: operations, strategy, and information technology, McGraw-Hill/Irwin, New York. Hensher, DA 2001, Handbook of logistics and supply-chain management, Emerald Group Publishing, Emerald. Hillier, F Hillier, MS 2010, Introduction to management science: a modeling and case studies approach with spreads, McGraw-Hil l Higher Education, New York. Knolmayer, G, Mertens, P Zeier, A 2002, Supply chain management based on SAP systems: order management in manufacturing companies, Springer, New Mexico. Lewis, M Slack, N 2003, Operations management: critical perspectives on business and management, Routledge, Hull City. Madura, J 2009, International financial management, World Scientific Public Co. Plc, Farrer Road. National Restaurant Association 2012, NRA products services, https://chooserestaurants.org/. Needle, D 2010, Business in context: an introduction to business and its environment, Cengage Learning EMEA, Waterford. Thompson, H 2001, International economics: global markets and international competition, Cengage Learning, Mason, OH. This report on Operations Management of KFC was written and submitted by user Susan Warren 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. You can donate your paper here.
Wednesday, November 27, 2019
A Hologram for the King by Dave Eggers essays
A Hologram for the King by Dave Eggers essays When I read A Hologram for the King, I noticed different aspects that I would like to develop. In my opinion, this book is about much more than just the decay of American business. Its about the life of a poor man who tries to deal with his difficult situation. So before beginning, lets have a short summary. Alan Clay, an ex-consultant and a victim of the Recession, is now a 54-years-old business man hired by Reliant in order to present a new technology, a holographic teleconference system, to the King Abdullah. By landing this contact, he would solve all his money problems as he is a debt?ridden man. Across the book and the wait for the king to come, Alan remembers his past and wonders about his purpose in the life. First of all, in my opinion, this story is about the nothingness both physical and psychological. On one hand, we can talk about a real physical desert because the whole story takes place in Saudi Arabia, which is not known for its luxury forests but for its small shrubs which dont need a lot of water. More particularly, the story takes place in King Abdullah Economic City which, according to the book, comprises only three buildings. For a city-to-be, its a kind of desert. The landscape was flat and blank. Anything built here, an unrelenting desert, was an act of sheer will imposed on territory unsuited for habitation. (A Hologram for the King, p34) They drove a mile before they arrived at a modest gate, a pair of stone arches over the road, a great dome atop it all. It was as if someone had built a road through unrepentant desert, and then erected a gate somewhere in the middle, to imply the end of one thing and the beginning of another. It was hopeful but unconvincing. (A Hologra m for the King, p40) On the other hand, when I talk about psychological nothingness, I allude to Alans life and relations. Hes divorced from his wife, Ruby,...
Sunday, November 24, 2019
Find the separation between two cones of the same type on the fovea of the eye by using the resolving power of the eye Essays
Find the separation between two cones of the same type on the fovea of the eye by using the resolving power of the eye Essays Find the separation between two cones of the same type on the fovea of the eye by using the resolving power of the eye Essay Find the separation between two cones of the same type on the fovea of the eye by using the resolving power of the eye Essay Objective: Find the separation between two cones of the same type on the fovea of the eye by using the resolving power of the eye. Introduction: The retina contains two types of light detecting cells: rods and cones. Cones provide the eyes colour sensitivity, rods, though more sensitive than cones do not detect colour. There is an area on the retina with a much higher density of cones called the fovea. When an object is observed its image is focused on the fovea. The fovea is a 0.3mm diameter area containing on rods and very thin densely packed cones. Cones can be divided into three types; one type detects each of red, green and blue light. The green and red cones are concentrated in the fovea centralis. : To measure the separation between two cones in the eye we can use the resolving power of the eye, for two objects to be resolved optically the viewer must be able to clearly differentiate two distinct bodies. (Rayleighs criterion:? = ?/d) Critical case shown where objects are just resolved For two light sources of the same wavelength to be resolved the light must stimulate two cones on either side of one unstimulated cone. Resolving power due to a circular aperture can be calculated by: ? = 1.22? d Where: ? = resolving power of optical instrument ? = Wavelength of light d = diameter of aperture The resolving power of the eye will not be as high as this calculated theoretical resolving power as although the optical equipment of the eye may be of this power the eyes detection facilities give the brain discreet not continuous signals and so the actual resolving power of the eye will never reach this theoretical value even if the optical facilities of the eye are perfect. As a result we must calculate the separation between two cones using: ? = s Where: s = separation r r = distance Plan: Factors identified affecting the experiment: * The separation of the two light sources. I will vary this to produce a range of distances from which the objects can be resolved. * The perpendicular distance that the viewer of the light sources can be from them and still completely resolve them. This will vary as a direct result of changes to the separation of the light sources. * The size and shape of the light sources. I will control this by shining the light through measured apertures made in black acrylic. I will control the size of the apertures by using a 1mm drill bit to create the holes through which the light sources will be shone, this will also ensure the sources are of a constant shape. * The amount of light that is reflected. I will use a black background surrounding the light sources to ensure that only a minimal amount of light is reflected. * The brightness of the two light sources must be equal to each other, I will achieve this by connecting the light sources in series to the same power source. * The brightness of the light sources must be constant as it is easier to resolve brighter objects. I will control this factor by keeping the voltage of the power source constant. * The wavelength of light must be kept constant by using the same equipment (same L.E.D.s) for each repeat of the experiment. This must be controlled as different colours of light stimulate different cones on the retina and also the wavelength of light affects the calculated value for the resolving power of the eye. * The height of the eye relative to the light sources must be constant and perpendicular. This will be controlled by having the light sources at a height of 1 metre and having the viewer use a metre ruler as a guide to the height of their eyes when resolving the light sources. * The size of the eye and the strength of eyesight must be constant throughout the experiment. This will be achieved by using the same observer throughout the procedure and carrying out the procedure in a single session. * The brightness of the environment must be constant. This will be kept constant by carrying the experiment out in a single session. Also the environment will be kept as dark as possible to maximise the resolving power of the eye and so optimise the accuracy of the results. * The diameter of the pupil must be kept constant and as large as possible to allow as much light into the eye as possible. This will be kept constant as a direct result of controlling the brightness of the environment. (Variation of 1mm to 10mm possible.) Method: Set up the apparatus as shown in the previous diagram, switch on the power pack at 3.00v. Turn off the lights in the room and block out daylight coming from any windows or doors. Allow 2 minutes for the eyes to adjust to this darkness and do not allow any light into the room from this point up until the end of the procedure. The viewer of the lights must then stand on the masking tape and back away from the light sources following the masking tape using a metre ruler as a guide to the height of their eyes. The viewer must back away until they are at the point where they can just resolve the two light sources. This point must then be marked on the masking tape using the metre ruler as a guide. Repeat the experiment for this separation three times to obtain a reliable result and eliminate any anomalous results. Three is enough results to obtain a good average result as long as all the results are relatively close together. Remove the acrylic and replace with another piece of acrylic with holes of different separations and repeat the above procedure. 5 different separations must be used as six results are sufficient to plot a straight-line graph and the sixth result can be 0,0. Less results than this may not produce an accurate gradient and more results would be surplus to requirements. When the experiment is completed measure the marks recorded on the tape for distances and then calculate an average distance for each separation. Plot a line graph of separation against average distance. The graph is plotted to produce a gradient to obtain a value for the resolving power of the eye the graph will reduce any overall errors in the experiment. Separation of apertures is to be measured with a travelling microscope accurate to ?0.005mm, this measuring equipment is to be used as it is the most accurate available to me in the lab and so will reduce the errors in my results by as much as possible. The other measurement to be taken is the distance from the objects from whence they can be resolved. This is to be measured using a measuring tape accurate to ?0.5cm this is sufficiently accurate as it is a very small error compared to the overall distance and so will not detract significantly from the accuracy of my results. When the results have been taken the calculation shown overleaf will be used to calculate the separation of two cones on the fovea. Safety: Electrical equipment must be used with care and it must be ensured that no water is brought into contact with it. Care must be taken whilst carrying out a procedure in a darkened room, ensure all sharp corners and protruding objects are cleared. Calculation: Equation 1: ? = s R ? = resolving power of the eye in radians s = separation of apertures r = Distance away from light sources when resolving is just possible Equation 2: s = r? s = separation of 3 cones r = radius of the eye ? = resolving power in radians Separation between two cones = s 2 Theoretical ? = 1.22? D ? = wavelength of light D = Diameter of pupil Assumptions: * Assume pupil size is constant * Assume diameter of the eye is 26mm * Assume no aberrations of the eye * Assume room is pitch black * Assume L.E.D.s are of constant brightness * Assume apertures are spherical * Assume all eyes work the same * Assume average green wavelength * Assume only one wavelength from L.E.D. * Assume pupil size is constant * Assume light source is perpendicular * Assume light crosses at the centre of the eye * Assume cones are all of equal size and shape. We can assume this as cones are densely packed in the fovea * Assume refraction at the entrance to the eye is zero. We can assume this as distance r is relatively large compared to the separation of the light sources so we can assume that the light entering the eye is perpendicular to the lens. As a result we can assume similar triangles: Test: I carried out a preliminary experiment using this procedure and found the separation of two cones to be 3.57?10-4m. As this is a factor of 10 away from the literature value for separation I will now alter my procedure by increasing the voltage of the power pack to 6.00v to increase the brightness of the L.E.D.s and so optimise the resolving power of the eye. I will test the accuracy of my results by carrying out the experiment in a bright room, resolving two black objects of a similar size to the apertures used in my procedure. Resolving power in this situation should be less than resolving power calculated in the results. Conclusion: ? = s = gradient = 3.125?10-4 r Separation of cones = r ? ? r = 1.3?10-2 = 4.062?10-6m = separation between 3 cones ?2 = 2.03?10-6m = separation between 2 cones Errors: This value is appropriate but it must be taken into account that the following errors will affect the final value: Equipment Tape measure accurate to ? 0.01m 0.05 ? 100 = 3.13% Use of tape measure accurate to ? 0.05m 1.60 Travelling microscope accurate to ? 0.01?10-3m 0.01?10-3m ? 100 = 2.27% Use of travelling microscope: error as above. 0.44?10-3m Other errors Assumption that the eye is 1.3 ?10-2 radius is a statistical average value and so may vary considerably. Refracted angle is negligible is an assumption which will affect the accuracy of the results as using this assumption we can use similar triangles to calculate the separation of two cones. Given these errors be taken into account my value is close enough to the literature value for the separation of two cones to confirm that my procedure was valid.
Thursday, November 21, 2019
The Relationship between Portrays of Abraham and Portrayals of God in Assignment
The Relationship between Portrays of Abraham and Portrayals of God in Judaism, Christianity, and Islam - Assignment Example There are three Abrahams with one covenant; this is because all the three religions view Abraham from a different perspective but the covenant in all the three religions is between God Almighty and Abraham. Christians view Abraham in terms of his faith and obedience in God, to Christians Abraham had a lot of faith and obedience in God and hence the making of the covenant. This is evident in Genesis 12:1-20 where God commands Abraham to leave his country and move to an unknown destination. The birth of Isaac shows that God keeps his promises to the righteous, faithful and those that obey him. Since Abraham was righteous even before he was circumcised, both the Jews and the Gentiles can become his descendants only when they have faith in the almighty God The Christians believe these to be the pillars that hold their religion together. Faithfulness and obedience are also evident when Abraham reaches sachem, where Yahweh pledged to Abraham that he would give Abrahams descendants that land, faithfully Abraham responded by building an altar. The Christians hold on to the faith that to both the Jews and the gentile Abraham is the ââ¬Å"father of all those that are faithful. According to Christians believe Abraham rested has a special status in the world of the dead, Luke 23; 43 states that when the righteous die they rest in Abrahams bosom, a place believed to be paradise. Abraham being the ideal patriarch them bosom means paradise. The believers in the Christian religion believe that they should follow into Abrahamââ¬â¢s footstep as his colossus faith and obedience in God showed them how to embrace Gods word with a universalism spirit and how to live well before God. The Muslim refers to him as Ibrahim, a man they believe to be the progenitor of Israel.à Ã
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