Critically Examine The relationship Between Ethnicity and Health The WritePass Journal

Critically Examine The relationship Between Ethnicity and Health Introduction Critically Examine The relationship Between Ethnicity and Health IntroductionReferencesRelated Introduction The policy makers are concerned with addressing or correcting imbalances that impact directly on ethnic minorities’ well-being, such as socioeconomic, health, housing, education, lifestyle and discriminatory factors. Aggleton (1990, p.5 as cited in Baggott, 2004) posited that health can be defined in two ways; ‘‘the positive approach, where health is viewed as a capacity or an asset, and the negative approach, which emphasises the absence of specific illnesses, diseases and disorders’’. Similarly the World Health Organisation (1946 as cited in Baggott, 2004) defined health as ‘‘a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity’’. This definition is significant in that it highlights physical as well as mental aspects of health while emphasising the ‘positive sense’ as in Aggleton’s definition of health. According to Giddens (2009, p.633) ‘â⠂¬Ëœethnicity refers to the cultural practices and outlooks of a given community of people which sets them apart from others’’. Ethnic groups have different traits that set them apart from other groups, such as religion, dress style, language, and history. However, ethnic differences are learned to an extent there have been associations made with health for most of these minority groups. While there is nothing innate about ethnicity, it is central to group and individual identity and similarly important to the health professions who suggest there is a relationship between health and ethnicity. Giddens (2009) argues that this relationship is partial at best but concedes that there is a rather high incidence of illnesses among individuals or groups of ethnic origins. This essay will critically examine and explain the relationship between ethnicity and health. In Britain as the 21st century progresses, its population composition of ethnic minorities is rapidly changing, despite Queen Elizabeth the 1st’s proclamation in 1601 that ‘negroes and blackamoors’ should be deported. She believed they were responsible in part for the social and economic dilemmas, such as famine and poverty (Haralambos Holborn, 2000, p.199). In contemporary Britain this contentious issue has continued amongst a mass population about what they believe to be ‘Britishness’ when it comes to ethnic minorities. According to Stillwell Van Ham, (2010) some see it as a disaster, which will lead to spatial segregation, communities breaking down and a burden to the health delivery system. Perhaps this could be explain why extreme right-wing parties such as the British National Party, which contests immigration and blames all social predicaments on ethnic minorities continues to attract support.   While others will argue that this will be goo d in terms of diversity and see it as an opportunity for an integrated society (Stillwell Van Ham, 2010). There are various ways in which health and ethnicity are related. For example there are differences in population structures, education, genetics, generational and socioeconomic factors between different ethnic groups that impact differently on their health (Bardsley, Hamm, Lowdell, Morgan Storkey, 2000). Prevalence of health related behaviours such as diabetes or cardiovascular disease to mention a few can be distinctively different for different ethnic groups, which indicates an association between ethnicity and health. However, Karlsen, (2004) posits that indicators or factors employed to investigate the relationship between ethnicity and health are likely to fail accounting for the central facets of ethnic minorities’ experiences which could influence health, especially the impact of socio-economic disadvantage, housing, poor health services, harassment and discrimination. As already mentioned above factors such as discrimination, socioeconomic, housing, education and the accessibility of health services have a direct impact and possible relationship between health and ethnicity. In the UK alone, research indicates that at least one in eight from the ethnic minority group experiences some form of racial harassment each year. While two fifths believe that half of the British employers would decline to offer someone a job on the basis of their ethnicity. Ethnic minorities have been shown to experience repeated health and socioeconomic disadvantages than the majority ethnic group. This has a direct impact on the mental health of ethnic minority individuals who experiences such. In a study using data from the Health survey for England, (1999) plus a follow up study, the Ethnic Minority Psychiatric Illness Rates in the Community (EMPIRIC) to explore relationships between interpersonal racism experienced, discrimination as perceived in wider society, occupational class and various indicators of physical and mental health for the diverse ethnic groups in England including minority and majority white groups. The results indicated that there were significant independe nt relationships found between each of the factors explored and health. Hence, from these results current assessments were urged to take into account the different forms of structural disadvantages experienced by ethnic minorities and the diverse ways in which racial expressions can impact on health (Kalsen, 2004). However, there are a number of important but varied factors bearing on the health of ethnic groups and the overall population, which Stubbs (1993) argued that to understand these health patterns of ethnic groups there has to be a comparison with the host   group (majority ethnic group).   For instance, demographic, housing, lifestyle, socioeconomic and health service factors have a direct impact on the health of individuals (Baggott, 2004). Bannister (1901 as cited in Haralambos Holborn, 2000) argued that an individual’s ethnic background contributes to whether or not they are at a decreased or increased risk of developing a certain disease (s). For instance, he was very critical of Jews and their lifestyle describing them as ‘‘Yiddish money pigs’’ who did not like taking baths hence, were prone to blood and skin diseases. Conversely, it is opined that Bannister in this instance was expressing his hostile feelings towards this particular ethnic m inority group instead of advancing an evidence based argument for the association(s) of certain diseases and ethnicity. African-Caribbean and South Asians are more prone to developing diabetes than white Europeans. However, African-Caribbeans are far less likely to suffer from coronary heart disease than white Europeans which is more prevalent within the South Asians (Harding Maxwell, 1997; Nazroo, 1998). Suffice to say access to high quality health services is vital in sustaining a state of total physical, mental and social well being. According to Bunker, Frazier, and Mosteller (1994 as cited in Baggott, 2004), preventative measures such as screening, immunisation and medicine add at least 18-19 months to an individual’s life expectancy. A similar effect is also found when curative medicines are taken increasing the life expectancy by between 44-45 months. Generally this has not really happened with the ethnic groups as there are factors like discrimination and language barriers that impinge on the accessibility of health care. The social context in which ethnic minorities live and experience presents various challenges and disadvantages that will directly impact on their health negatively (Giddens, 2009). Pickett and Wilkinson (2008), argued that one’s health could be determined by the neighbourhood in which one lives, for example if a minority low status individual l ives in a higher quotient vicinity of their own racial or ethnic group then their health is likely to be better than those that live in lower quotient vicinities, this is referred to as the ‘group density effect’. Conversely, Smaje (1995) posits that concentration of ethnic minorities into poor vicinities has an independent and direct bearing on their health. Social structures for ethnic patterning in health show that African-Caribbean and Asians are more disadvantaged (Baggott, 2004). Harding and Maxwell’s (1997) study of the health of ethnics suggested that Indian, Pakistani and Bangladesh have a particularly high rate of diabetes and ischemic heart disease in comparison to other ethnic groups. This could be attributed to poor or overcrowded housing facilities amongst other factors already mentioned briefly above. Nazroo, (1998) from the findings of his study on the health of ethnic minorities agrees that Pakistani and Bangladeshi ethnic minorities experience high morbidity in comparison to other ethnic minority groups. He also found out that African Caribbean men had a lower mortality rate due to coronary heart disease, but were more prone to dying of a stroke compared to their counterparts including the majority ethnic group population. African-Caribbean and Asians ethnic groups do tend to record higher rates of hypertension, d iabetes and are three times more liable to having renal replacement therapy compared to the ethnic majority population (Raleigh, 1997). The health of ethnic minorities as mentioned above can be negatively affected by socioeconomic factors such as, employment and employment conditions. The majority of ethnic minority groups work in hazardous occupations, receive poor remuneration with diminished prospects for career progression. Their employment relationships are akin to the bourgeoisie and proletariat relationship. Bartley, Lynch, Sacker and Dodgeon (1998) suggest that the above findings of poor employment conditions and remuneration highlight the relationship between work conditions and high morbidity and mortality in ethnic minorities. Conversely, unemployment has an association poor health in that it cultivates financial hardship, stress, poor diet and living conditions. Factors such as socioeconomic disadvantages, poor housing, discrimination and poor health services create a knock on effect in one’s life cycle, ultimately exposing individuals to a host of disease and illnesses through a lack of equal opportunities. This leads to, anxiety, hypertension, depression and social isolation loss of one’s self esteem and purpose in life, which may result in the development of physical and mental health problems (Bartley, 1994 as cited in Naidoo Willis, 2000). However, Hull (1979) suggested that there is a correlation between migration and health. He attributed this to factors such as nature of symptoms and language barrier hindering ethnic minorities from accessing the right treatments because of the existing contextual cultural differences. Furnham and Bochner (1986) argue that if the host group does not offer any social support, and discrimination is displayed within vital institutions such as work environment, health, judiciary, and welfare. It creates more social stress resulting in mental illnesses for the migrating ethnic minorities. In addition Smaje (1995) links discrimination stressors to the psychological well-being as he suggests that racism has a bearing on differences in health between minority ethnic groups and the majority ethnic population. According to Pilgrim and Rogers (1999) black ethnic minority groups have a relatively short life expectancy and often have the worst health amongst ethnic minorities. In addition to that they posit that black ethnic minorities who experience mental health issues are likely to be discriminated against, often being depicted as an added threat or risk compared to the majority ethnic group. The Ethnicity and Health Report (2007) suggested that ethnic minorities have a higher probability rate of being confined in psychiatry through the criminal justice system unlike through diagnosis from the health system compared to the host group, especially Afro-Caribbean and Black Africans. Giddens (2009) supports the above statement by positing that indeed ethnic minorities mostly afro-Caribbean and black Africans are more likely to be stopped by law enforcers than their white counterparts. This form of institutionalised racism by law enforcement agents and the whole criminal justice system has sign ificant negative effects on minority groups’ psychological well being. Smith, Kelly and Nazroo, (2008) posited that racial discrimination, socioeconomic factors and policies that do not allow for equal opportunities and generally improve their existence within a host group could lead to a lasting effect on their mental and emotional health. In addition, injustice within the vital systems that provide help, health, work, and education further corrode ethnic minorities’ dilemma in terms of their physical and mental health (Smaje 1995). Evidence provided from the Ethnicity and Health Report, (2007) indicating the disparities in mental health between ethnic minorities and the host group is to some extent contentious, given that a cosmic amount of data employed is based on treatment rates. Consequently, this research indicated that ethnic minorities, particularly Afro-Caribbean people have higher rates of psychosis which is seven times more compared to the host group. Kalsen, Nazroo, Mckenzie, Bhui Weich (2005) from their research in the UK, on racism and mental health in ethnic minorities found that there was a significant relationship between racial discrimination and psychological well being. Indication from the results suggested there was a recurrence rate of psychosis annually of six per thousand for Bangladeshi people, ten per thousand for Indians, thirteen per thousand for Pakistani people, while they was sixteen per thousand for Afro-Caribbean people (Nazroo King, 2002 as cited in Kalsen et al., 2005). Nazro o (1998) from his studies posits that ethnic minorities’ mental health is worse than that of the host group. His findings were based on comparisons of the rates of reported suicide and para-suicide cases. Furthermore, Afro-Caribbeans are much more likely to be diagnosed as schizophrenics than their white counterparts (Smarje, 1995). Evidence reviewed in this essay has shown that there is a relationship between ethnicity and health (Kalsen, 2004). However, some of the evidence is contentious in that treatment rates were used to make a general assumption on ethnic minorities’ health (Ethnicity and Health Report, 2007). Evidence also suggests that indicators such as low-economic statuses, migration, and discrimination, poor access to health services, local area deprivation and high unemployment have a direct bearing on ethnic minorities and their health. It could be argued that the determinants of health vary between ethnic groups as a result of differences in genetic and socioeconomic factors which cannot be generalised across all ethnic groups. The evidence reviewed demonstrates differences in health across ethnic groups. These findings are important indicators of the need for investment programmes that are specifically targeted at improving the quality and quantity of health and other related services for ethnic minority groups. Future policies need to move away from a capitalist approach were ethnic minorities are exploited for their services with little reward and improvement of their social being. There should be a balance of socio-economic factors in-order to stimulate change and shape policies that improve accessing of quality health and related services such as education. They are fundamental to the health of both ethnic minorities and ethnic majority in modern day Britain. References Baggot, R., (2004). (3rd ed). Health and Health care in Britain. Published by Palgrave Macmillan. Bardsley, M., Hamm, J., Lowdell, C., Morgan, D., Storkey, M., ( 2000). Developing health assessment for black and minority ethnic groups; Analysing routine health information. Retrieved March 21 2011from apho.org.uk/resource/view.aspx? Bartley, M., Lynch, K., Sacker, A., Dodgeon, B. (1998). Social variations in health: relationship of mortality to the ONS socio-economic class (SEC) schema. In SEC Validation Workshop, University of Essex. Ethnicity and Health Report (2007). Retrieved March 3 2011, from parliament.uk/documents/upload/postpn276.pdf Furnham, A. And Bochner, S., (1986). Culture shock: Psychological reactions to unfamiliar environments, Routledge, London Haralambos, M. Holborn, M. (2000) Sociology themes and perspectives (5th ed). Published by Harper Collins. Harding, S., Maxwell, R., (1997). Differences in the mortality of migrants. In: F. Drever, M. Whitehead, Health inequalities. London: The stationer Office. Hull, D., (1979). Migration, adaptation and stress: A review. Social Science and Medicine 13A, 25-36. Kalsen, S., (2004). The influence of racism on ethnic inequalities in health: A missing link? University College London. Retrieved March 21 2011 from http://www2.Ise.ac.uk/socialPolicy/BSPS/annualconference/2004/healthAndEthnicity.aspx Karlsen, S., Nazroo, J. Y., Mckenzie, K., Bhui, K., Weich, S. (2005) Racism, psychosis and common mental disorder among ethnic minority groups in England. Psychological medicine, 35, 1795-1803. Cambridge University Press. Giddens, A., (2009) (6th ed). Sociology, Cambridge, Polity Press. Naidoo, J., Willis, J., (2000). (2nd ed) Health Promotion, Foundations for practice. Harcourt Publishers limited. Nazroo, J., (1998). Genetic, cultural or socio-economic vulnerability? Explaining ethnic inequalities in health. Sociology of health and illness 20, pp 710-730. Cited in Scopus (87). Pilgrim, D., Rodgers, A., (1999). Sociology of Mental Health and Illness. Buckingham, Open University Press. Pickett, K. E., Wilkinson, R. G., (2008). Ethnic group density effects on health; Ethnicity and Health, 13, 4, 321- 334. Retrieved March 3 2011, from informaworld.com/openurl?genre=articleissn=1355%2d7858volume=13issue=4spage=321. Raleigh, V.S., (1997). National Institute of Epidemiology University of Surrey Guildford GU2 5YD. Smaje, C., (1995). Health Race and Ethnicity, King’s Fund Institute, London Smith, N. R., Kelly, Y. J., Nazroo, J. Y., (2008). ‘‘Intergrational continuities of ethnic inequalities in general health in England.’’ Journal of Epidemiology and community Health 63, 253-258. Stillwell, J., Van Ham, M., (2010). Ethnicity and Integration: Understanding population Trends and Processes, Vol 3, 1-25 retrieved 16 March 2011 from https://springerlink3.metapress.com Stubbs, P., (1993).’’Ethnically sensitive’ or ‘anti-racist’? Models for health research and service delivery’, in W. Ahmad (1993b), pp.34-47.

The American civil war. Arms and Equipment of the Civil War Essay

The American civil war. Arms and Equipment of the Civil War - Essay Example Lee who served as the confederate commander surrendered. In western civilizations, wars, such as the American Civil War, are usually characterized by five essential features. These include: Technology The Armed Forces of the West have always relied on superior technology, usually to compensate for inferior numbers. In the American Civil war, there were technologies that made this conflict more lethal than other past wars that had been conducted in the United States. This was the last war in which ancient artifacts such as wooden ships were used during hostilities. It also saw the introduction of weapons such as torpedoes, Gatling Guns, ironclads, and submarines, into modern warfare. When the war first broke out, the soldiers from both the Union and Confederate sides used old smoothbore muskets.1 These weapons allowed only for slow reloading and had a firing range of approximately eighty yards. Soon the Union soldiers were outfitted with rifles, which allowed for quick reloading of bu llets and had better accuracy and a wider firing range. The Confederate army would also start utilizing these types of rifles for more effectiveness. Both armies also began to make use of a new bullet known as the ‘Minnie ball’. The Minnie ball was much easier to reload than the older bullets. While these new types of weapons were more efficient, they also caused many more casualties within a shorter time period. Minnie balls resulted in many soldiers who were not effectively killed by this contraption sustaining deep tissue damage. Unfortunately, the surgeons did not know how to effectively combat such wounds and would often cut off limbs of the affected patient in order to save his life. Another weapon that gained widespread use during the civil war is the Gatling gun- which was essentially a machine gun that was positioned on wheels. This weapon could kills tens of men while being fired and rotated to cover all sides. Discipline More in the Western civilization relie d heavily on discipline, Western military practice has always exulted discipline, rather than kinship, religion or patriotism as the primary instrument that turns bands of men as individuals into soldiers fighting as part of an organized unit.2 In the American civil war, the soldiers had to live in a structured society which had privates at the lowest rank, followed by corporals and then sergeants, second lieutenants, lieutenants, captains, majors, lieutenant colonels, and finally colonels. To keep the men in top fighting condition, there was strict discipline. Offenses as minor as disregarding camp duty and not taking good care of one’s rifle was punished by hard labor such as digging latrines and uprooting large trees. More serious offenses such as theft, insubordination, or even cowardice in the time of action were punished by forcing the errant soldier to perform activities that would humiliate them before their colleagues. For instance, men were forced to carry logs, or wear signs that proclaimed their mistakes to all. There were also offenses such as performing acts of treason, murder, and desertion for which the errant soldier would be killed by hanging or by a firing squad. These punishments would be administered by the army’s Provost Marshal. Aggressive Military Tradition Shared military theories and doctrines help soldiers to understand how to conduct major operations as well as campaigns while preparing them for service in the fields. In the American civil war, the armies utilized Jomini's war theories. Baron Jomini’s theory on war was based on major European wars such as took place in the

Global Change threatens the liberal order Assignment

Global Change threatens the liberal order - Assignment Example The world economy has been working in quite a complex way in the past decade. The critical role has been played by the global financial crisis and breakdown of the American rule and power (Groody, 2002). The paper is an analysis of present situation of the international liberal order and trends that have threatened its presence in the current context. The paper also analyses an antithesis that supports the previous order and concludes on a choice between the two opinions. Liberal order in the context of liberal internationalism assumes that governments and people have a shared common interest towards establishment of the global cooperative world, despite the existence of restrains, sovereign equality and reciprocation. The optimist view for international liberal order goes forth to discuss that all states have the ability to overcome constraints with a view to cooperate, thereby resolving security issues, working towards collective action and consequently, developing a stable and open system (Steins, 2004). United States of America was deemed to be the champion of international liberal order until the twentieth century. The sponsor, function and role of United States have undergone a major change over the recent years. Facts such as, those pertaining to geo-political position of the United States, have been responsible for shaping up America’s liberal order, but more important aspects are the logic and character of this very liberal order placed within the global context. The political system of the western world, including currency, technology, alliances and markets, has been fused with the liberal order for providing a base for liberal internationalisation. During the Cold War, the United States developed towards becoming operator of the global capitalist form of liberal political order (Ikenberry, 2011). With closure of the Cold War, peaceful terms that emerged were more in

Quality of service of a network

Quality of service of a network CONGESTION MANAGMENT: Networks which are designed to support most different traffic types which share a single data path between routers. Congestion management techniques should be considered in such cases to ensure the quality and treatment for the various traffic types. Traffic prioritization especially important for delay-sensitive, interactive transaction based application for instance, for example takes video conferencing that requires higher priority than the file transfer applications. However use of WFQ (weighted fair queuing) ensures that all traffic is treated fairly. Prioritization is most effective in WAN links where the combination of bursty traffic and relatively lower data rates can cause temporary congestion if there is no congestion on the WAN link, there is no reason to implement traffic prioritization. APPLICATION QUALITY: By various parameters used for network quality of service which allows the specification of quality metrics. Such quality of service metrics are monitored and analysed using network quality parameters and important aspect of quality which is always ignored in many cases and overlooked is the behaviour of each and every individual applications in the internet recognised .most applications try to possess a majority part of network resources possible, immediately it may not or influence the quality of an application. NETWORK QUALITY OF SERVICE: The Ability to provide better service to a selected traffic.Quality of service refers to the ability of a network to provide highest quality service to any selected network traffic using various technologies in the latest networks used with a combination of traffic Qos ensures the exact application to be accessed to the resources of the network first, it is a combination of various technologies which allows application to recive request most acceptable and predicted service levels in terms of data and its Bandwidth (throughput capacity) latency variation in jitter, packet loss and delays.Qos provide the best features and more predictable network service by following methods(cisco 2009) Ø Dedicated bandwidth and support Ø Loss characteristics Ø Congestion avoidance and mangment of network Ø Network traffic shaping OPERATION OF QOS: Ø Qos distinguishes the traffic and splits it with very exact timing requirements Ø It improves resources in the network so that all the traffic reaches the specified destinations reliably and faster Ø It doesnt create any bandwidth it simply manages it effectively to meet the application requirements (OPNET 2008) Here the working of qos follow a series flow of simple rules in order to execute the file or a packet and at first the packet is pass through the classification which means that the following packet must be in which group does it fit then the packet is moved on to the next level which is the pre-queuing which means that the following packet is arranged in a order according to the source and the destination numbers and then it is again moved on to the next level which is the queuing and scheduling its main work is to set the stream to the destination point so that it automatically enforces the bandwidth allocations then moves on to the last level which is the post queuing which increases throughput on the lower speed links so that it reaches the destination point within the time it has decided and thus the working of the qos is completed. ADVANTAGES OF QOS: Ø Dedicated bandwidth Ø Controlled network latency and jitter Ø Improved loss characterstics Ø Control and predictability beyond best effort concept (OPNET NETWORK 2008) NEED OF QOS IN A NETWORK: All packets in a network are given equal access to all the resources , the priorty acn only be given when we can distinguish data packet from a voice packet. For a company network to effectively use the network and its resources it must identify which network traffic is the appropriate and which is not to allocate the right recourses to effectively support the traffic streams . The priority should be given to all the data streams to failing to do so can create low quality of voice and data, because most of the audio and visual application is delay and jitter sensitive. Only a good Qos can give the audio and video packets the best priority access. Qos evolution: The networks which are used with Qos enabled are called the Best -effort network. Where each and every packet is treated in the same way which is significantly important in the network design for preferable results, when even space in the cpu is available these type of networks work prominently. There are two major architectures of qos, both the architecture have different approach and different ways of quality of service in their own preferable ways. The main architecture of Qos is integrated services and differentiated services. Traffic characteristics that Qos tools can effect 1) Bandwidth 2) latency 3) jitter 4) compression 5) queuing BANDWIDTH: Bandwidth refers to number of bits per second that can reasonably be expected to be successfully delivered across same medium. firstly bandwidth techniques are mainly used to describe or define network traffic and to do this we can set some special type of techniques which are mainly used by the network devices such as blue coat for instance and by using this we can setup a type of service (TOS) in the packet of the internet protocol header and by using the required information of the type of service we can set the device in action and allow the traffic to flow in different direction and for another instance we can choose some factors to involve this issue such as audio clarity, if the sound is audible in two different direction then it is said to be working in perfect condition and this can be measured by the MOS (which means the mean opinion score) , so by this we can rate from 1-5 which means that 1 scores the worst and 5 scores the best and the average typical analogue call whi ch rates from 4.1 to 4.7 and a avg cell phone ranges from 3.5 to 3.9 and if we considered the VOIP CALLS ranges from the 4.0 to 4.4 so which means that the VoIP also has the best average rating in audio clarity and if we comes to reliability comes to 99.999 so which is more reliability to the customers and the usage of them is also more and the techniques used in this kind of symphony which is sophisticated and the consistency is also more which is mixed out with the qos so this is in short all about bandwidth in qos LATENCY: It is mainly specified as some serious problem to qos which is also known as the delay and if we speak in technical words its the same amount of time taken by a packet from source to destination and if the latency and the bandwidth are defined they are for speeding the network so for instance we can say that a normal average person can hear a call upto 250 ms approx and 200 ms in sensitive person ear so if the call doesnt return in that range the caller is going to be disappointed. JITTER: It also refers to the same problem but for connectionless or wireless so which is also called as a delay which must be a serious and most inappropriate but business customers such as for company which is dealing with important calls so in this here if we see the database server is connected to some system and the employees are storing some information to the database systems and in between there are calls to handled and the calls doesnt seems to go through the cloud of the similar database server so we can find the disturbance which are caused by the latency and jitter so in order to watch and control the traffic we must maintain the jitter in control and the specification for this is it must be less than 100 ms for the communication less than 100 ms for normal database because if the jitter took place a bit slow in voice band it doesnt have a problem but if it takes under the packet series then it might be some kind of serious issue so in order to reduce this we must all keep the j itter in control. bandwidth refers to number of bits per second that can reasonably be expected to be successfully delivered across same medium Compression: Either the payloads or the headers compressed by reducing the total number of bits required to transmit the data. Call Admission control: reduces all the overall load of the network by denying any new incoming voice and video calls. Queuing: Qos refers to a broad collection networking technologies and techniques. The goal of Qos is to provide guarantee on the ability of a network to deliver predictable results. Qos involves prioritization of a network, Qos is a method to guarantee the bandwidth relationship between individual or application or protocols. Qos refers to the capability of a network to provide a better service to selected network traffic over various underlying technologies including frame relay,(Cisco systems Inc. 1999). There are seven Qos mechanisms and tools that are used to implement Qos in a computer network. Ø Congestion management Ø Congestion avoidance Ø Control admission control Ø Shaping and policing Ø Bandwidth reservation Ø Link efficiency Ø Classification and marking 1.1.3 Aim of Qos is to provide a dedicated bandwidth sufficient to deliver for the service of the applications by controlling latency and jitter, and by reducing data loss. Network characteristics managed by quality of service. Category of quality of service mechanisms: 1) Admission control 2) Traffic control 1.2.1 Admission control: Gives the information of number of users and the applications used to network resources it allows only specific users and resources which can be used in a network segment (subnet). 1.2.2 Traffic control: It controls and regulates the data flow by classifying and marking the packets based on priority and by stopping traffic, service class assigned to a traffic flow which evaluates the quality of service treatment, the traffic receives. 1.2.3 Call admission control: It provides the overall quality for all the networks, it controls the voice disturbance from the voice traffic, and video from the other video traffic 1.3.2 Classification and marking: For defining a quality of service identifying the traffic is the first case involved in the procedure which is treated either differently or preferentially which is done by classification and marking. 1.3.3 Bandwidth reservation: Bandwidth reservation provides guarantee to the bandwidth, i.e., bandwidth is provided whenever needed without reserving it for a specific application or flow in a network. 1.3.4 Shaping and policing: The significant issues related to quality of service in a network are solved by traffic shaping , the delay and loss in a network are solved by traffic shaping which is called as(egress blocking)The data which is sent or received are measured by traffic shaping and traffic policing . traffic policing in a network is used to remove all the excess packets which helps to overcome the policed rate. The excess packets are again en-queued by shaping. Both shaping and policing prevent the traffic from exceeding the bit rate defined. Link efficiency: Link efficiency is used increase the quality of service of a network,particularly if the given note continuously increase the bandwidth rate on a network which causes the sudden change in behaviour of the network. Which slows down data applications significantly.if the load exceeds the given bandwidth for a period of time the application slows down completely or even stops down ata particular point because of the continuous queues which can be avoided by using the link efficiency. 1.3.6 Congestion management: Whenever queuing occurs in a network congestion management gives the ability to rearrange the packets. 1.3.7 Congestion avoidance: Congestion avoidance tools are used to avoid congestion. It enables queue to avoid congestion. Whenever the rate of transmission load and offer load exceeds the line rate send by various senders.Queues are formed which may cause congestion. The queue are managed by congestion avoidance tool by dropping the packets randomly which are selective which reduces the congestion level. WHY DO WE NEED QOS Each and every packet will be given equal access to resources when we not consider the QoS policies. We cannot give voice priority if we cannot tell a voice packet from a data packet. In order to utilize its network resources efficiently for a company, so to support those traffic streams it must identify which network traffic is critical traffic and allocate appropriate resources to support those traffic streams. Otherwise, the result could be intermittent with voice quality complaints. Applications like voice and video are delay and jitter sensitive. Voice packet will be given first priority access to the interface queue, when we use a good QoS policy. For example, both FTP and an voice packet arrive at the same time at an outbound router interface. When we not consider the QoS policies the voice packet may need to wait in the queue until the FTP packet has been processed out the interface. This may results delay of unacceptable amount of delay into the voice path which will depends upon the interface speed. Traffic flow with out qos (global knowledge,whitepapers,[2],author:gardiner2008) The voice packet could be given priority first over the FTP packet when we use QoS configuration. The FTP packet may be fragmented to make sure that the voice packet does not show any excessive delay, if the interface speed is less than T. QoS Evolution The main reason for the wide transformation of best-effort models to more complex differentiated services models is by privately owned enterprise and service providers networks, the meaning that the network gives different applications differing levels of service. 2.6.1 Congestion Management (Queuing): QoS queuing tools provide you with a variety of queuing methods. Queuing tools define a number of queues. The queuing tools are as follows: a. Priority Queuing(PQ) b. Custom Queuing(CQ) c. Weighted Fair Queuing(WFQ) d. Class-Based Weighted Fair Queing(CBWFQ) e. Low Latency Queuing(LLQ) f. Modified Deficit Round-Robin(MDRR) a. Priority Queuing: Priority Queuings most distinctive feature is its scheduler. PQ schedules traffic such that the higher-priority queues always get serviced, with the side affect of starving the lower-priority queues. With a maximum of four queues, called High, Normal, and Low, the complete logic of the scheduler can be easily represented, as shown in figure. (Cisco systems, 1999) b. Custom Queuing: As with most queuing tools, the most interesting part of the tool is the scheduler. The CQ scheduler reserves an approximate percentage of overall link bandwidth to each queue. CQ approximates the bandwidth percentages, as opposed to meeting an exact percentage, due to the simple operation of the CQ scheduler. The CQ scheduler performs round-robin service on each queue, beginning with queue 1. CQ takes packets from the queue, until the total byte count specified for the queue has been met or exceeded. After the queue has been serviced for that many bytes, or the queue does not have any more packets, CQ moves on to the next queue, and repeats the process. (Morgan, 1991) c. Weighted Fair Queuing: Weighted Fair Queuing differs from PQ and CQ in several significant ways. The first and most obvious difference is that WFQ does not allow classification options to be configured. WFQ classifies packets based on flows. A flow consists of all packets that have the same source and destination IP address, and the same source and destination port numbers. So, no explicit matching is configured. The other large difference between WFQ versus PQ and CQ is the scheduler, which simply favors low-volume, higher-precedence flows over large-volume, lower-precedence flows. Also because WFQ is flow based, and each flow uses a different queue, the number of queues become rather large up to a maximum of 4096 queues per interface. And although WFQ uses tail drop, it really uses a slightly modified tail-drop scheme- yet another difference. (Cisco systems Inc, 1999) d. Class-Based WFQ: CBWFQ is most like CQ, in that it can be used to reserve minimum bandwidth for each queue. It does differ from CQ in that you can configure the actual percentage of traffic, rather than a byte count. CBWFQ is like WFQ in that CBWFQ can actually use WFQ inside one particular queue, but it differs from WFQ in that it does not keep up with flows for all the traffic. e. Low Latency Queuing (LLQ): LLQ combines the bandwidth reservation feature of CBWFQ with a PQ-like high priority queue, called as Low Latency Queue, which allows delay-sensitive traffic to spend little time in the queue. But first, this section begins with WFQ, which uses a completely different scheduler. Table 2: Comparison of Queuing Tools. (Odom W, et al, 2005) Tool Maximum Number of Queues Classification Capabilities Queue Service Algorithm/ End Result of Algorithm PriorityQueuing (PQ) 4 IP ACL Input interface Fragments Strict service; always serves higher-priority queue over lower queue. Custom Queuing (CQ) 16 IP ACL Input interface Fragments Serves a configured number of bytes per queue, per round-robin pass through the queues. Result: Rough percentage of the bandwidth given to each queue under load. Weighted Fair Queuing (WFQ) 4096 Automatic, based on flows, (Flow identified by source/destination address and port numbers, plus protocol type.) Each flow uses a different queue, Queues with lower volume and higher IP precedence get more service; high volume, low precedence flows get less service. Class-Based Weighted Fair Queuing (CBWFQ) 64 IP ACL NBAR Same as CB marking Service algorithm not published; results in set percentage bandwidth for each queue under load. Low Latency Queuing (LLQ) N/A Same as CBWFQ LLQ is a variant of CBWFQ, which makes some queues priority queues, always getting served next if a packet is waiting in that queue. It also polices traffic. Modified Deficit Round-Robin (MDRR) 8 IP precedence Similar to CQ, but each queue gets an exact percentage of bandwidth. Supports LLQ mechanism as well.

The Paradox of Rich-to-Poor Capital Flow Essay -- North-South Capital

According to the Solow Growth Model, all countries will eventually converge to their long run steady state. If we consider the usual assumptions, of countries producing the same goods with the same constant returns to scale production technology, using (homogenous) capital and labour as factors of production, differences in income per capita income will reflect differences in per capita capital. Therefore, essentially if capital is allowed to flow freely, new investments should occur only in the poorer economy. However this is certainly not the case in reality. Most of the net capital flow in the past four decades has been north-to-north (rich countries investing in other rich countries), rather than north-south (rich economies investing in poorer ones) as predicted by the Solow Growth Model. Lucas (1990) compares the USA and India using data from 1988 to show that capital does not flow from rich to poor countries as predicted by the neoclassical growth model, and in setting out his simple framework he illustrates the paradox that exists. Assuming a production function y = Ax^B, the relative marginal productivity of capital (MPK) will be given by- rIndia/ rUS= (yIndia / yUS)^(ÃŽ ² -1)/ ÃŽ ². Plugging the data from 1988 in, we find that the marginal product of India should be 58 times that of the USA, as a result of which all investment should flow from the US to India. This is where the paradox lies-in reality such flows are not observed. The law of diminishing returns implies that the marginal productivity of capital will be higher in poorer countries. If this model is correct, and the capital markets are free and complete, investment should take place in India and other poor countries, and not in the USA or other richer countres... ...11. 3. Michael A. Clemens. (2002). Do Rich Countries InvestLess in Poor Countries thanthe Poor Countries Themselves?†. Available: www.jstor.com. Last accessed 20th Jan 2011. 4. Jonathan Eaton Mark Gersovitz Joseph E. Stiglitz. (1986). THE PURE THOERY OF COUNTRY RISK. Available: http://www.nber.org/papers/w1894.pdf. Last accessed 20th Jan 2011. 5. Wei, Shang-Jin. (2000). Local Corruption and Global Capital FlowsComment and Discussion. Available: www.jstor.com. Last accessed 20th Jan 2011. 6. Ays ¸e Y. Evrensel. (2004). Lending to developing countries revisited: changing nature of lenders and payment problems. Available: http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6W8Y-4DS906V-1-1&_cdi=6667&_user=128590&_pii=S0939362504000615&_origin=search&_coverDate=09/01/2004&_sk=999719996&view=c&wchp=dGLbVzW-zSkWA&md5. Last accessed 20th Jan 2011. 7. Lecture Notes

Perfectly balanced poem Essay

â€Å"Essential Beauty† by Philip Larkin is a perfectly balanced poem of two 16-line stanzas. In the poem Larkin explores the subject of advertising in the early 60s. He begins by describing the subjects on huge billboards on the sides and ends of buildings. He suggests that these enormous images are placed in slum areas and that this is inappropriate and doubtful in its honest intention.  Larkin’s outstanding criticism is directed towards the content of the adverts. He makes it clear that â€Å"motor oil and cuts of salmon,† are of no consequence or beyond the finical ability of the people who live in the blocks of streets and slums where these billboards are pasted. â€Å"Cars† and â€Å"deep arm chairs† bed time cups and radiant electric fires warming â€Å"cats by slippers on warm mats† are certainly not the experiences of those who dwell in the vicinity of the outrageous adverts. They:  Ã¢â‚¬Å"Reflect none of the rained-on streets and squares  They dominate the outdoors.†Ã‚  This criticism is at its height in its description of an advert for butter:  Ã¢â‚¬Å"†¦Ã¢â‚¬ ¦High above the gutter  A silver knife sinks into golden butter.†Ã‚  Here he employs a cheap advertisement rhyme and exposes the ridiculous image which is clearly inappropriate for those upon whose house the advert may be displayed. Furthermore Larkin clearly despises the image of:  Ã¢â‚¬Å"Well balanced families, in fine  Midsummer weather.† In the second stanza Larkin exposes the frothy emptiness of the images and moves on to explain the reality behind the images in the advert. As a result he demonstrates the distortion and dishonesty of advertising. Larkin states that we live in a different world from that which the advertisers depict:  Ã¢â‚¬Å"†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦our live imperfect eyes  That stare beyond this world.†Ã‚  Ã¢â‚¬Å"†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦nothing’s made  As new or washed quite so clean,†Ã‚  In a country pub the clients are all â€Å"with clothed ones from tennis clubs.† We learn that there is a boy throwing up in the gent’s toilet and a pensioner being cheated at the same time. Larkin reserves the final thrust for the cigarette advertisers. The dying smokers will not have a chance match lit meeting with a beautiful person however hard meeting with a beautiful person however hard they â€Å"drag† on their fags. The reality which Larkin seems to suggest in the last two lines, is that the beautiful women is visible, standing apart, recognising the dying smoker and the image of her goes dark as the smoker dyes. Philip Larkin exposure of the falseness, bad taste and down right dishonesty of billboard advertising is shocking and disturbing. At a time when the population of Britain was beginning to enjoy a rising income the advertisers were settling vulture like to grab any extra income from the poorest people. The advertisers were openly suggesting that the purchase of their products would inrich their lives, maintained their youth and give them motorcars. Larkin seemingly intense dislike of this whole medium is based on the sense of humanity and compassion. He does seem to care for the people who the advertisers are trying to win over; those who have spent most of their lives trying to live on a very small income. I found Philip Larkin’s poem â€Å"Essential Beauty† quite unfathomable to begin with. However once I was aware of it was making a comments about billboard advertising over forty years ago I began to understand Larkin’s subject and became aware of his stance. Although the advertising he describes is extremely dated in some respects compared to the two -dimensional advertising of today, it is none the less clearly recognisable from the poem. The advertisement depicts very middle classed people, images and expectations. Larkin certainly explains the contrast of these images with the reality of the lives and living conditions of the working class people who had to live with these enormous images around them, dominating their lives. I sympathise with Larkin, I think this type of advertising must have been insulting if not a clear signal that there was a huge division between the classes at that time. I think this poem is a powerful historic statement about inequality and insensitivity

The Truman Show and Behavioral Psychology Why a Utopian...

For centuries, man has dreamt of constructing pristine simulated worlds , existing in a separate sphere from our imperfect reality. From the town of Pullman, a company town south of Chicago to Disney World, attempts to force Utopia have failed, falling prey to the complications of people’s personal desires. The Truman Show, directed by Peter Weir, tells us the story of The Truman Show, an elaborate reality show built around the control of one man’s life. Christof, the director, has created an entire living city for Truman, the star of his show, and the only one not in on this whole elaborate fakery. Essentially, Truman is living his life in the simulation of a flawless, archetypal American town, for the entertainment of millions of†¦show more content†¦Truman’s life is free from dilemmas, and from any real choices to make regarding the path of his life. In Christof’s ideal world, Truman appears free to do anything he wants, while operating within the well-defined limits set by him and his crew. Ideally, the outside world (the world of Christof and the show’s audience) should have no influence on the separate world of Seahaven. To keep Truman in Seahaven, an island town, Christof stages a storm that supposedly kills his father, instilling a fear of water in Truman. Christof tries to contain Truman in the world of his own design, and limit Truman’s reality to the carefully selected domain of his TV show. In his attempt to completely separate Truman’s experience to the simulated world of the Truman Show, Christof is setting himself up for failure. The breakdown of his control system is ensured from the start, by the incompleteness of Christof’s knowledge of his constructed world. The most crucial gap in his knowledge is his unawareness of the inner intentions and desires of the people involved with the show. The best he can do is infer people’s emotions, and condition them to follow the rules of his simulation. In the case of the actors, this means making sure their personal goals and feelings are exactly that of the show as a whole. In Truman’s case, this means aligning his