Cloning Essay Example | Topics and Well Written Essays - 3000 words

Cloning - Essay Example ifferent contexts in biological research but in its most simple and strict sense, it refers to a precise genetic copy of a molecule, cell, plant, animal, or human being. In some of these contexts, cloning refers to established technologies that have been part of agricultural practice for a very long time and currently form an important part of the foundations of modern biological research† (Nussbaum & Sunstein, 1998, p. 1). Although this method has created many live successes, it has proved significantly less likely to generate successful instances of pregnancy than those conceived naturally via sexual intercourse. Additionally, the majority of cloned mammals have had some form of birth defect. Mammals do not replicate their own DNA through the natural process. This occurs only by cloning which presents both scientific and ethical implications. â€Å"The prospect of such replication for humans has resulted in the most controversial debate about reproduction ever to be taken up in western civilization† (McGee, 2001). Plants create offspring through replication by the natural method. When mammals replicate DNA by artificial means the practice is complex both technically and socially speaking. Those who are in opposition to cloning humans contend that this unnatural form of reproduction has a tremendous potential for basing dubious procreation decisions with regard to the genetic engineering of children. Their worry is that the traditional family is in jeopardy of evolving in a bizarre, unfamiliar and socially undesirable direction. Supporters of cloning procedures say that it may possibly, among other attributes, serve society as a valuable alternative infertility treatment. The cloning of animals has provoked the debate regarding the social, legal and ethical aspects concerning human cloning. Because of failure rate as compared to the customary conception method in animal testing, scholars, scientists and politicians usually agree that human experiments

Public International law Essay Example | Topics and Well Written Essays - 1750 words

Public International law - Essay Example What this means is that where there are gross violations of human rights without internal structures to mitigate the suffering of victims, alternative forces have the right and duty to intervene and correct the situation. It must be understood that governments that tend towards gross violation of human rights are necessarily despotic in nature (Engelhart, 2009). This aspect of their being means that they must systematically destroy systems that are structurally opposed to their ideals of violence and philosophies of oppression and suppression. In time therefore there is left no meaningful forces within the despotic system to safeguard the rights of the citizens. The absence of a corrective mechanism means that the violations will go on as long as the oppressor lasts (Engelhart, 2009). This situation therefore warrants the intervention of foreign powers to protect, restore, and sustain human rights. Moreover in situations where some of the despotic governments refuse to be party to in ternational protocols that bind them towards the protection of human rights only external forces can move in to alleviate the suffering of the citizens. ... The relationship between governments and the international protocols on human rights can still be seen in the second dimension of member countries that still flout the codes for the preservation of the same rights they undertook to protect. There have been cases where countries which are party to the United Nations protocols turn round and start oppressing their civilians with little regard to the essence of rights, freedoms, and the sanctity of human rights. There are case studies all around the globe although parts of Eastern Europe, Asia, Africa, and The Middle East have featured most prominently in this disregard of human rights. Mass murder, arbitrary confinement, summary execution, and detention without trial are some of the examples that feature among the countries that renege on their legal obligations to safeguard their citizens’ rights and freedoms. This willful abuse and subjugation of the rights of individuals must be met with direct and active measure from whateve r source for the sole purpose of restoring the just order as idealized in the principles of good governance and as enshrined in legal systems, both foreign and local. Another argument for this measure should be that laws are meant to be kept and that there must be consequences attached to non-compliance. One case study of such intervention is illustrative in North Atlantic Treaty Organization (NATO) forces intervention of the Kosovo crisis to ease the magnitude of human suffering and the trampling of individual rights and freedoms under the authority of the then president Slobodan Milosevic. Although the magnitude of human suffering was great it can be argued that the intervention of the foreign forces

Anyone lived in a pretty how town by E.E. Cummings Essay

Anyone lived in a pretty how town by E.E. Cummings - Essay Example The poem addresses one of the most major concerns for individuals in any society: the fear of dying alone and without touching the heart of another person. The main character in the poem is a lively man: â€Å"he sang his didn’t he danced his did† (Cummings); however it is clear that the people around him did not notice or care about his existence: â€Å"Women and men (both little and small) cared for anybody not at all† (Ibid.). This basic premise of the poem is very simple however it reflects the plight of many people in society who try their best to live life to the fullest and simply cannot hold the attention of anyone else who wishes to share it with them. Anyone is not an outwardly timid man, nor is he particularly a social outcast, it is simply that he does not have a partner in life and the fact that â€Å"someones married their everyones† (Cummings) merely highlights the fact that Anyone was alone in a world where everyone else seemed to find happiness with other people. Anyone is aptly named because he can literally be anyone, anywhere, who struggles to be appreciated and loved by one other special person (Baum 162). Noone is an elusive character who it eventually becomes clear does not actually exist at all. She is presented as the admirer of Anyone, at first: â€Å"Noone loved him more by more†¦she laughed his joy she cried his grief† (Cummings). The children in the town comment about how Noone loved Anyone, and while this seems like it might allude to the fact that Anyone is loved by someone who he does not love in return, it becomes apparent that Noone is more of a dream that Anyone has (Deutsch 114). He thinks about the non-existent Noone who might share in his life; he carries this dream with him until his death when â€Å"Noone stooped to kiss his face† (Cummings). In this ending sentiment in the life of Anyone, the poet finally admits that Anyone’s lover did

Constitution and Administrative Law Coursework Example | Topics and Well Written Essays - 1000 words

Constitution and Administrative Law - Coursework Example The case was held by Lord Reid, that it was the state was liability to compensate the damage caused to the Japanese. This was awarded successfully. However, there was a retrospective Act of parliament that was formed 1965 following war damages. This law outlined that no compensation was to be awarded following a lawful order from a legitimate person in authority, as long as it is in the favor of the state. A Law is a body of principles; rules and regulations recognized and applicable to a state in the management of justice.3 Due to different areas of their application, laws are grouped into different categories such as constitutional law, administration law, and criminal law among the others. Constitutional law is concerned with the powers and role of institutions within the state and with the relationship between the state and the citizen.4 The constitution is a lively, dynamic entity which at any point in time; reflects the political and moral values of the people it governs. Accordingly, the law of the constitution must be appreciated within the social and political context in which it operates. There are three major arms of government including the judiciary, legislature, and executive. Judiciary is concerned with the enforcement of rules and regulations in the society. The main role of the legislature is to create and amend laws. The executive arm of government is concerned with planning and implementation of plans and developmental roles of government in the society. Every government has a law making body that is concerned with the amendments and creation of new laws in the society.5 Law changes and nature of rules are meant to boost efficiency and effectiveness of the governance of the people in the society. â€Å"The law making body of government is referred to as legislature and parliament is the sovereign body of the legislation in most states†6 Parliament being the sovereign legislative body has sole jurisdiction over its

The Role of Women and Minorities in the History of the Labor Movement Essay Example for Free

The Role of Women and Minorities in the History of the Labor Movement Essay Labor movements emerged as the working class and workers grouped into association in a bid to fight for their interests at the workplaces. Their interests which were mainly better treatment by the employers and the sate government called for creation of particular laws that concerned working relations. The specific collective associations that have existed within societies include trade and labor unions. In addition to the several elites and the political associations that actively participated in labor movements, women as well as the minority groups have made substantial contributions to the development of the labor movements. Most of the contributions were through trade unions and organizations. These include Women Trade Union League in the United States, The International Ladies Garment Workers Union, Womens Education, Industrial Union and Amalgamated Clothing and Textile Workers Union. In addition, there are notable contributions of individual women such as Ann Morgan, Frances Perkins, Alva Vanderbilt Belmont, Clara Lemlich, Jane Addams, Florence Kelley, Rose Schneiderman, and Eleanor Roosevelt. This dissertation will entail a research through literature provide information on the role of women and the minority in the history of labor movement in America. Further, it will come up with a discussion regarding the roles of women in the history of trade movements in America. The effluent Women support A group of well-off women such as Frances Perkins, Alva Vanderbilt Belmont and Ann Morgan supported the efforts of the working class women through intercession with officials and donating money as well as protesting with them; these women were commonly referred to as the â€Å"Mink Brigade†. Born in 1853, Alva Belmont was a wealthy socialite who funded the women’s suffrage movement. She gave huge amount of money to the United States and United Kingdom movement. Further, she formed the Political Equality League to campaign for politicians who supported the suffrage goals. Frances Coralie Perkins Frances Coralie Perkins, who lived between 1882 and 1965, was the United States Secretary of labor between 1933 and 1947. She was the leader of the New York Consumer League where she advocated vigorously for appropriate working conditions and hours. In addition, Perkin is credited with the progressive reforms where she increased factory examinations, reduced the working hours of women to forty eight hours and advocated for laws of the unemployment insurance for the and minimum wage.   Perkins is known for her lenience on Harry Bridges, who was a communist leader of the International Longshore and Warehouse Union. She held the same interest with Smith in regard to social reform. Eleanor Roosevelt and Jane Addams Eleanor Roosevelt made major contribution in labor movements. After her husband, Franklin Roosevelt illness, she began to work with the Women’s Trade Union League. Eleanor supported the league in raising funds for its agenda like forty eight hour work week, child labor elimination, and minimum wage. Laura Jane Addams, who was born in 6 September 1860, founded the United States Settlement House movement. She assisted in the mediation of the Garment Workers Strike of the nineteen ten. Rose Schneideman Rose Schneideman, born between 1882 and 1772, was a well-known socialist and labor movement leader during the first decade of the twentieth century. Schneiderman started working in 1895 as cashier before becoming a lining stitcher within a cap plant. In nineteen hundred and two, she moved to Montreal where she began her unionism and political radicalism. In nineteen hundred and three, she went back to New York where she organized women working in the same factory that she worked in.   She is renowned for her contribution in the cap makers’ work stoppage of nineteen hundred and five which involved the entire city. She became an active member of the New York branch of Women’s Trade Union League before she was elected its vice president in nineteen hundred and eight. Moreover, she was actively involved in the Uprising of the 20,000 which was initiated by the International Ladies Garment Workers Union. Later on, Rose Schneideman became the national president of the Women Trade Union League. Schneideman phrase, â€Å"Bread and Roses† was widely used in the nineteen twelve textile strike which involved mostly women workers in Massachusetts. Again, she strongly opposed the Equal Rights Amendment which was viewed as denying the working class women legislative protection that WTUL had championed. Clara Lemlich Clara Lemlich lived between 1886 and 19982. She led the Uprising of 2000 which involved the shirtwaist laborers and contributed to her being blacklisted form garment industry. Later she joined the Communist party and became a consumer activist. She had joined the garment industry after migrating to New York. When her employer demanded double production of the employees, Lemlich together with several co-workers, revolted against the low pay, lack of advancement opportunities, long working hours, and the demeaning treatment by the supervisors. She got actively engaged in International Ladies’ Garment Workers Union where she was voted to the executive committee. She led numerous work stoppages of shirtwaist makers and challenged male union leaders to organize women workers in the garment industry. Lemlich is well known for her speech at the mass gathering of Shirtwaist Company and Leiserson Company workers seeking to strike, that led to the start of the strike. Lemlich further, devoted herself to suffrage activities where she founded the Wage Earners League together with Leonora O’Reilly, Schneiderman as well as two other women. This league was a substitute of the middle class suffrage organization that sought to involve and represent the working class. The Wage Earners League admitted only working class women as members. However, it sought support from the non working class and associated itself with the National American Woman Suffrage Association which it had earlier discounted. Florence Kelley Florence Kelley was born in 1859. She founded the National Consumer League that called for consumers to purchase products that came from companies which met the leagues standards. The standards included working and minimum wage. Moreover, Kelley was an activist for women suffrage and helped assisted in the laws concerning working conditions and child labor. The Women Trade Union League The league was established in nineteen hundred and three for both the affluent and working class women to support the attempts of women in organizing labor unions as well as stop unfavorable conditions. The Women Trade Union League played a significant role in aid of the considerable workers stoppage during the initial twenty years of the twentieth century. Their contribution included the formation of the Amalgamated Clothing Workers of America and International Ladies’ Garment Workers Union. Women Trade Union League drew on efforts of advocates in the settlement movement as well as in expanding unions that represented workers within industries that had a large number of women like textile and garment industries. Some of the activists of the settlement movement included Florence Kelley and Jane Addams. The league was led by both aristocratic philanthropists and experienced working women. In addition to aiding several strikes, the league supported the New York shirtwaist work stoppage of nineteen hundred and nine that involved more than twenty thousand people. The league provided headquarters for the organization of the strike, legal services and witnesses for picketers. In addition, it joined protesters in picket line and organized mass gatherings and matches to broadcast the shirtwaist workers grievances and the sweatshop situations they were advocating against. Although, the â€Å"Uprising of the 20, 000† produced some benefits to workers, it was not completely successful. Most of the Italian laborers participating in the strike gave up while most of the protesters did not have sufficient resources to engage in the strike. As well, although Lillian Wald was one of the pioneers in the National Association for the Advancement of Colored People, some African America activists encouraged black laborers to disengage from the strike. The Women Trade Union League also supported the work stoppages of New York cloakmakers and Chicago clothing workers in 1910 as well as the nineteen eleven’s Cleveland strike of garment workers. In addition, it aided the many other trade movements efforts in Massachusetts, Iowa, Wisconsin, and Missouri. However, after nineteen twelve, the league eased its involvement in trade movements and only participated in incidences where the strike leadership was appealing. In addition, the Women League had a semi- official connection with the American Federation of Labor as well as collaborated with the Amalgamated Clothing Workers of America union. The league also founded a school in 1914 that taught women to be laborers leader as well as organizers. What is more, it contributed greatly in bringing garment workers of Italian origin into the union. The Women Trade Union League in legislative reform The league advocated for several change of legislation that affected workers. In particular, it embarked on working for the reforms on the minimum wage, the eight-hour day and the protective legislation. However, the league spared, in call for reforms, legislation that gave special protection to children and women.   The work of WTUL can also be described by the active advocacy for safety in work places both prior to the Triangle Shirtwaist fire of nineteen eleven and after. The event of the fire that resulted to death of one forty five individuals exposed the sincerity of activists such as Rose Schneiderman. WTUL criticized the character of National Women Party which was rather more individualistic. In addition, the league opposed the Equal Rights Amendment that was crafted by the National Women Party in the argument that the legislation would discredit the gainful benefits that WTUL had achieved. In the nineteen twenties and after, the league concentrated more on labor legislation. The leaders largely supported the â€Å"New Deal† and created a close connection with the administration of President Roosevelt via Eleanor Roosevelt who was a WTUL member from nineteen twenty three. The league was disbanded in nineteen fifty. Womens Education and Industrial Union The union engaged female researchers like Louise Bosworth to investigate the working situations of Women. The International Ladies Garment Workers Union The International Ladies Garment Workers Union was among the leading labor unions in America. Its membership was primarily female and it played a pivotal role in the history of labor unions. In 1995, it merged with Amalgamated Clothing and Textile Workers Union resulting to the Union of Needletrades, Industry and Textile Employees (UNITE). Further, UNITE merged with Hotel Employees and Restaurant Employees Union (HERE) to form a union referred to as UNITE HERE. Analysis The women role in trade union was split into the working class and the non working class. The non working class who were involved in the labor movement included the effluent women who used their political influence and financial powers to get through with their agendas. The working class labor leaders and activists were suspicious and mostly differed with the effluent women in regard to the implementation of the labor movements agendas. The non working class was seen as not genuine in advocating for the interests of the laborers. However, some effluent women such as Eleanor Roosevelt, Coralie Perkins and Alva Benmont played a pivotal role in the history of the labor movements. Mostly, women activists were affiliated with women’s labor movements. The mainstream labor movements were mail dominated and alienated women from decision making. However, women such as Rose Schneider were involved in leadership of labor movements with male membership although the primary membership was women workers. Conclusion Generally, roles of women in the history of labor movements are defined within mostly, the representation of women workers. These women affiliated to women labor unions which had primarily female membership. However, many women were concentrated in particular industries such as garment and textile industries. Therefore, most movements were male dominated and rarely gave chance for women participation. References: Annalise, O. (1995): Common Sense and a Little Fire, Women and Working-Class Politics in the United States, 1900-1965, University of North Carolina Press, Chapel Hill Berg, G. (1989): Frances Perkins and the Flowering of Economic and Social Policies, Monthly Labor Review Foner, P. S. (1979): Women and the American Labor Movement, From Colonial Times to the Eve of World War I Frances, P. (1946): The Roosevelt I Knew, New York: Penguin Group Martin, G. W. (1976): Madam Secretary, Frances Perkins. Houghton Mifflin Company, New York Maurine, B. H., et al, (2007): The Eleanor Roosevelt Encyclopedia. Retrieved from http://www.questia.com/pm.qst?a=od=104599663. Accessed on 2007 October 19 Naomi, P. (1999): Frances Perkins, Champion of the New Deal, Oxford University Press, New York Orleck, A. (1995): Common Sense and a Little Fire: Women and Working-Class Politics in the United States, 1900-1965. Peter, H. (2002): Cities of Tomorrow, Blackwell Publishing. Stasz, C. (2000): The Vanderbilt Women: Dynasty of Wealth, Glamour and Tragedy. iUniverse, New York Stuart, A.M. (2006): Consuelo and Alva Vanderbilt: The Story of a Daughter and a Mother in the Gilded Age. HarperCollins, New York

Features of bluetooth technology Essay Example for Free

Features of bluetooth technology Essay The logo for Bluetooth is based on Runes surrounding the legend of Harald Bluetooth. Bluetooth the technology is based on communications central to man’s own personal space. Fundamentally Bluetooth operates within the Industrial, Scientific and Medical (ISM) band at 2. 4 GHz. It is a short-range wireless communication standard defined as cable replacement for a Personal Area Network (PAN) (see â€Å"Bluetooth†. Grolier Encyclopedia of Knowledge, pp. 87-94). Figure 1 is the Bluetooth Logo. A cable replacement standard has been defined because cables limit mobility of the consumer; they are cumbersome to carry around, are easily lost or broken. Often connectors are prone to difficult to diagnose failures; or are proprietary. To counteract these limitations Bluetooth is designed to be light and portable. It can be embedded to take the riggers of physical knocks and shocks. It includes standards and protocols to make it mobile, robust, reliable and not limited to one manufacturer (see â€Å"Bluetooth†. Grolier Encyclopedia of Knowledge, pp. 87-94). The operating band also fits the goals of Bluetooth, imposing requirements as a cable replacement. The cost needs to be comparable with cable. Reductions can be achieved by operating in the licence free 2. 4 GHz ISM band, keeping backward compatibility wherever possible lowers the cost of ownership by avoiding upgrades and having a relaxed radio specification enables single chip integrated circuit solutions. It also needs to be as reliable and resilient as cable and cope with errors and degradation caused by interference. For mobile devices it must be compact, lightweight, low power and easy to use (see â€Å"Bluetooth†. Grolier Encyclopedia of Knowledge, pp. 87-94). A. 1 Frequency Hopping We have addressed the reasons for the Bluetooth without delving into the ‘nuts and bolts’ of the technology to discover how it operates. For the majority of countries the ISM band used by Bluetooth is available from 2. 40-2. 4835 GHz, although some countries impose restrictions. In this band Bluetooth uses Frequency Hopping Spread Spectrum (FHSS) techniques in order to improve its immunity from interference (see J. Bray and C. F. Sturman, Bluetooth: Connect Without Cables†, Prentice Hall). In unrestricted countries the radios hop in pseudo random sequences around all available channels, this equates to 79 RF channels with a channel spacing of 1 MHz. Starting at a base frequency of 2402 MHz then the frequency of the channels, f, can be expressed as: f =2402 + n MHz where, n, is the channel number with an integer value in the range of 0 to 78. In restricted countries a limited frequency hopping schemes with just 23 channels is used and is catered for in the Bluetooth specification. Both hopping schemes have a 1 MHz channel spacing making it possible to design a simple radio interface whereby the baseband only has to specify a channel number and the radio multiplies this up to the appropriate frequency offset (see J. Bray and C. F. Sturman, Bluetooth: Connect Without Cables†, Prentice Hall). In this FHSS scheme there are 1600 hops per second, which is a hop every 625  µs. Part of this hop timing is taken up by the guard time of 220  µs allowing the synthesizer time to settle. The frequency hopping implements time division multiplexing as shown in Figure 2. The basis of the scheme has the Master device transmitting in the first 625 us slot, k, and here the Slave receives. In the next slot k = 1 the Slave is permitted to transmit and the master listens (see J.Bray and C. F. Sturman, Bluetooth: Connect Without Cables†, Prentice Hall). Figure 2: Frequency Hopping, master and slave interact on corresponding slots The radio must be able to retune and stabilise on a new frequency within tight time constraints. This is pushed further when establishing a connection; the hop rate can be shortened to every 312. 5 us. As the radios are constantly hopping to different radio channels, this ensures that packets affected by interference on one channel can be retransmitted on a different frequency channel. To further enhance resilience both ARQ (Automatic Repeat reQuest) and FEC (Forward Error Correction) form part of the specification (see J. Bray and C. F. Sturman, Bluetooth: Connect Without Cables†, Prentice Hall). One drawback with the normal hop sequence is the time taken for production testing. Bluetooth ensures adequate frequency coverage with a test sequence allowing the radios to be tested at a faster rate (see J. Bray and C. F. Sturman, Bluetooth: Connect Without Cables†, Prentice Hall).

Implementation of User-Pairing Algorithm for OFDMA

Implementation of User-Pairing Algorithm for OFDMA Table of Contents (Jump to) Introduction Literature Survey Problem Formulation References CHAPTER 1:  INTRODUCTION Introduction Orthogonal frequency division multiple access (OFDMA) is an encouraging technology that supports high data rate transmission. The blend of OFDMA with the relay technology has expanded a large extend of potential to develop the overall network performance, and therefore has received a lot of intension in the recent years. Network resources that may include bandwidth and transmission power are limited; hence how to efficiently and fairly allocate these resources to users with guaranteed quality of service is a key issue. The models used while dealing with the partnering problem usually involve some form of orthogonality across the user pairs, so that the pairs can cooperate without causing interference to each other. OFDMA, has a lot of essential properties due to which it has gained a lot of acceptance and popularity in the recent years, and because of its orthogonal structure it is considered as a good candidate for realizing practical cooperation. As we already know that huge amount of research is done on sub-channel and power allocation schemes for OFDMA. Yet, encoding techniques, and resource allocation for mutually cooperative OFDMA systems, have not been investigated much until rather recently. For cooperative OFDMA systems containing only two users, achievable rates based on mutual cooperation across sub-channels were characterized in [3], and for such systems, optimal power allocation algorithms are used. Relay-assisted cooperative communication Relay-assisted cooperative communication has turn out to be very effective in several wireless systems [1]. This communication system is capable to enhance the overall system performance that includes spectral efficiency, network lifetime and coverage area. Efficient wireless resource allocation is critical to fully realize these benefits in cooperative communication systems. Resource allocation in orthogonal frequency division multiplexing (OFDM) based relay communication systems involve even more technical challenges. Single-hop OFDM or OFDMA which are traditional systems when compared then we must carefully and accurately coordinate the power and subcarrier allocations across different hops resulting from multiple relays. Compared with single-carrier relay systems, in this we are able to assign multiple orthogonal subcarriers in every single hop, which not only gives more design freedoms but also typically higher design complexity or intricacy. In this paper, we will take a close look on the power control problem, joint relay selection, and subcarrier assignment for a cooperative two-hop multi-relay OFDM system using the protocol called amplify-and-forward. The main aim is to make the most of the transmission rate subject to an individual power constraint of each transmit node. Recently, a number of results have been described on relay selection in two-hop multi-relay systems. A common selection strategy is to choose the relay with the best equivalent end-to-end channel gain. Similar strategy can be used in OFDM systems, where a relay is selected based on the channel condition of the whole OFDM symbol. However, such symbol based relay selection may not be efficient as the differences of channel conditions amongst diverse subcarriers are not completely utilized. The subcarrier-based relay selection, which selects one best relay for each subcarrier, was then proposed to exploit both frequency diversity and node diversity. [2] Two-way relay network In this type of network, two users or operators communicate with each other via one or multiple relays. There are three two-way relaying protocols which differ in the number of required phases. The first protocol is called as the simple four phase protocol consisting two one-way relaying protocols. The second protocol is named as the time-division broadcast (TDBC) protocol which consists of three phases. The third protocol is the multiple-access broadcast (MABC) protocol which consists of two phases. The MABC protocol is more bandwidth efficient compared with the other two protocols. Orthogonal frequency division multiple access (OFDMA) is one of efficient techniques to mitigate the problems of frequency selective fading. In an OFDMA network, a complete obtainable bandwidth is separated into a number of orthogonal subcarriers and multiple users transmit their information simultaneously using the different subcarriers without inter-user interference. Generally, it is assumed that the bandwidth of each subcarrier is much smaller than the coherence bandwidth of the channel, and so the channel of each subcarrier has a flat fading. In addition, the OFDMA network uses the method of adaptive resource allocation and thus delivers improved performance [4]-[5]. In a two-way OFDM relay network having a single user pair and a single relay, the sum capacity for both users over all subcarriers is maximized by power allocation and tone permutation. In resource allocation for a multiuser two-way OFDMA relay network is investigated to support two-way communication between the base station and each of multiple users. In several relay selection policies for a MABC DF two-way relay network are proposed. The subcarrier based relay selection usually assumes that signals received over one subcarrier is amplified (or decoded) and forwarded by a relay over the same subcarrier in the next hop. However this is not optimal in terms of system performance. An improved performance can be attained if subcarriers in the first and second hops are paired according to the conditions of their channel. Such a subcarrier pairing approach was proposed in [1]. AF-based two-hop multi-relay OFDM system An AF-based two-hop multi-relay OFDM system in which we optimally and mutually assign the three types of resources: subcarriers, relay nodes, and power. Such joint optimization hasn’t been well thought of or considered in the literature as far as we know. We formulate it as a joint relay power allocation problem, subcarrier pairing, and selection with an objective of exploiting the transmission rate under specific power constraints. A dual nature can be used for solving the optimization problem in three phases. First, we find the optimal power allocation for any given strategy of subcarrier pairing and relay assignment. In the second phase, we determine the optimal relay assignment when subcarrier pairing is given. And in the last or third phase, we obtain the optimal subcarrier paring by means of the Hungarian method. The overall complexity of the optimal algorithm is polynomial in the number of subcarriers and relay nodes. Based on the intuition derived from the optimal algo rithm, we further propose two suboptimal algorithms that have lower complexity but can achieve close to optimal performances. PRACTICAL SUBOPTIMAL PAIRING ALGORITHMS In our model, the locations of the users, and their distances to each other are the major factors that affect their transmission rates. The impacts of Rayleigh fading and noise variances on the rates are negligible in comparison to path loss. This forces the power allocation and partner selection to be mostly dependent on the topology of the network, which means that a suboptimal but fast algorithm can be derived based only on user locations as an alternative to the maximum weighted matching algorithm. But then, the weights of the graph will not be needed to match the users, and this will decrease the time consumed by the matching algorithm drastically. We will be dealing with 5 algorithms as following:- Select Nearest to Receiver algorithm:- The two users nearest to the receiver get matched. These users are removed from the pool, and the algorithm repeatedly matches the rest of users with the same method until every user is matched. Select Farthest from Receiver algorithm:- The two users farthest from the receiver get matched. These users are removed from the pool, and the algorithm repeatedly matches the rest of users with the same method until every user is matched. Maximum Matching on Nearest Four to Receiver algorithm:- The user nearest to the receiver is selected. Then, three users which are nearest to it are selected. Maximum weighted matching algorithm runs on those users and the users get matched. The algorithm repeatedly matches the rest of users with the same method until every user is matched. Maximum Matching on Farthest Four from Receiver algorithm:- The user farthest from the receiver is selected. Then, three users which are nearest to it are selected. Maximum weighted matching algorithm runs on those users and the users get matched. The algorithm repeatedly matches the rest of users with the same method until every user is matched. Select Nearest and Farthest to Receiver algorithm:- The user farthest to the receiver gets matched with the nearest to the receiver. These users are removed from the pool, and the algorithm repeatedly matches the rest of users with the same method until every user is matched. The performance comparisons of the above algorithms are presented in this section. CHAPTER 2:  LITERATURE SURVEY In 2010, N. Balasubramanian, A. Carroll and G. Heiser et al, proposed that:- A rich body of literature has been dedicated to measuring the power consumption of cellular and WiFi interfaces for mobile users. Although a variety of power consumption models have been proposed and studied, one general conclusion is that, in spite of comparable power consumption (typically around 1 W), WiFi is much more power efficient in sending/receiving the same amount of data because of the higher data rates (e.g., a few Mbps for 3G while ten or more Mbps for 802.11n) [6]–[7]. Assuming that the wireless link is experiencing path loss as well as Rayleigh fading during the process is totally unacceptable. Note that, the data rate of the wireless link varies for different distances as well as channel realizations. In 2005, L. Shao and S. Roy, T. Thanabalasingham, S. Hanly, L. Andrew et al, proposed:- Resource allocation and interference management of multi-cell downlink OFDMA systems were presented. A key focus of these works is on interference management among multiple cells. Our general formulation includes the case where resource coordination leads to no interference among different cells/sectors/sites. In our model, this is achieved by dynamically partitioning the sub channels across the different cells/sectors/sites. In addition to being easier to implement, the interference free operation assumed in our model allows us to optimize over a large class of achievable rate regions for this problem. If the interference strength is of the order of the signal strength, as would be typical in the broadband wireless setting, then this partitioning approach could also be the better option in information theoretic sense [9][7]. In 2004, A. Nosratinia, G. Tsoulos et al proposed that:- A. Nosratinia, G. Tsoulos et al proposed MIMO systems because in recent years, MIMO systems [10] have been widely accepted as the ultimate approach to fulfilling the high performance demands of current and future generation of wireless systems. Using multiple antennas at the transmitter or/and receiver dramatically increases the spectral eà ¯Ã‚ ¬Ã†â€™ciency and enables the system to achieve very high data rates. It is also widely accepted that the majority of multi-antenna spatial diversity techniques are mainly applicable in downlink transmissions due to the size and complexity constraints that limit their implementation in small mobile units [11]. However, to achieve spatial diversity on the uplink without the need to have more than one antenna per mobile unit, cooperative transmission is the answer. In this case, the mobile units help each other to emulate a multiple transmit antenna system. In 2006, Yang and Belfiore proposed that:- Yang and Belfiore present a near optimal AF scheme which in certain conditions is able to achieve the diversity multiplexing trade-off (DMT) upper bound introduced. In [13], cooperative diversity protocols which are based on DF relaying are developed. The relay nodes that can fully decode the received transmission relay to the destination using a space time code. The idea of cooperative diversity under asynchronous channel conditions was suggested. The authors in [12] proposed a simple DF relay technique in a Code Division Multiple Access (CDMA) system where the relay nodes detect and forward the transmission regardless of whether successful decoding has occurred or not. In [13] a 2 hop asynchronous cooperative diversity technique is introduced where the authors propose two different protocols to determine the participating nodes. In this technique, the set of participating relays that receive the packet without errors is the only set of nodes involved in the relaying process. In 2004, Sendonaris et al proposed that:- The second type of uplink cooperation, which will be the main focus of this chapter, is based on pairing each user with a neighboring user, a â€Å"partner†, to create a MIMO-like effect on the uplink transmission. This was first suggested by Sendonaris et al. [14] in a synchronous full-duplex CDMA system utilizing orthogonal spreading codes. The technique was for a two user system where at the first transmission instance both users transmit their symbol to the other user and the base station. The symbol is then received and processed by the other user and in the following transmission instance the users transmit a composite signal consisting of their own symbol and a detected estimate of their partner’s symbol, each spread with its user’s spreading code, to the base station. In 2003, A. J. Jahromi, et. Al proposed that:- In this case at each transmitting instance, each user transmits a composite signal of both his new symbol along with a detected estimate of his partner’s previous symbol. In this method, to maintain the total transmit power constant, the joint transmit-power is manipulated such that at the base station, the average received power and the received power per user remains constant. In [15], the authors propose a new multiuser uplink pairing CDMA technique in which each user transmits its own signal to the base station and follows that by relaying a processed estimate of his partner’s information. At the receiving end, an algorithm is utilized to achieve near optimum ML performance with reduced complexity. CHAPTER 3:  PROBLEM FORMULATION 3. Problem formulation Scheduling and resource allocation are essential components of wireless data systems. Here by scheduling we refer the problem of determining which user will be active in a given time-slot; resource allocation refers to the problem of allocating physical layer resources such as bandwidth and power among these active users. In modern wireless data systems, frequent channel quality feedback is available enabling both the scheduled users and the allocation of physical layer resources to be dynamically adapted based on the users channel conditions and quality of service (QoS) requirements. This has led to a great deal of interest both in practice and in the research community on various channel aware scheduling and resource allocation algorithms. Many of these algorithms can be viewed as gradient-based algorithms, which select the transmission rate vector that maximizes the projection onto the gradient of the systems total utility. REFERENCES [1] A. Nosratinia, T. E. Hunter, and A. Hedayat, â€Å"Cooperative communication in wireless networks,† IEEE Comm. 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