'Mass education has not brought a decline in religious observance. It Essay

'Mass education has not brought a decline in religious observance. It has, instead, reconfigured the ways in which Muslims kno - Essay Example With time, some of the traditional ways of people have faded away all thanks to the changes that the world has undergone. Everything has taken a turn to a certain direction. The economy has changed; the social lives of people have changed, and the cultural life of people and political atmosphere are different from the past. Whether all this changed have happened all for the positive reasons is yet unknown, but one thing is clear in all this; individuals have become more aware of their surroundings. They have come to see that the world around them is changing. They have acquired the knowledge and are literate enough to distinguish between things. This is one of the major developments that have occurred. Individuals have become more literate. They have come to learn more, and this brings them closer to understanding the changes that have occurred. Literacy has been something that has been taken seriously and it is considered a necessary aspect in the development of an individual. Peopl e now value the aspect of education more than they did a time ago (Kaplan, 10, 2006). They have become literate, and all this is because of development and change. Literacy has brought change in politics, economy, culture and tradition and the social lives of people. ... Much to the contrary, mass schooling and literacy have heightened the public interest in Islam and widened access to Islamic texts. This increasing demand for Islamic knowledge has created a highly charged educational field, where different interest groups and institutions vie for the hearts and minds of Muslims. The main focus will be turned on to two countries that have Muslim influence; Egypt and Turkey (Eickelman, 45, 1992). A number of ethnographic and historical studies that examine the place and politics of Islam in public education will be reviewed in order to give the basis of educational influence on Muslims. By the end of this essay, questions will be answered that relate to literacy and Islam. Questions like, â€Å"What happens to religious socialization when it becomes formalised (set curricula) and centralized (state-controlled)?† will be answered. Another area of interest that will be looked into is the Eickelman’s (1992) suggestion that states that, â₠¬Å"mass education has led to an â€Å"objectification† of Islam†. Also there will be a discussion of Starrett’s (1998) notion of â€Å"functionalization† of Islam – â€Å"putting it consciously to work for various types of political and social projects†. There is also another area of interest that relates to the discussion; Kaplan’s (2006) thesis that the religious nationalists of post-1980 Turkey have promoted an â€Å"Islamic secularity† through school curricula. All this will be put into consideration in order to test whether literacy has brought Muslims closer to them realizing their true heritage and embracing it. Public education is not, of course, confined to formal schooling. Saba Mahmood (2005), for example,

Managing Organizational Communication Essay Example | Topics and Well Written Essays - 4000 words

Managing Organizational Communication - Essay Example Improving listening skills and learning to use and interpret nonverbal cues and verbal communication will help effective communication. Effective feedback is essential to let employees know where they stand and direct them to help achieve organizational goals. Organizations are made up of groups which are again made up of individuals. For sharing of information and coordination of activities, communication is absolutely necessary between groups and individuals. Individuals exchange knowledge, ideas, feelings and emotions using written messages, spoken words and gestures. "Organizations survive by making sense of and giving sense to their environments" (Sutcliffe, 2001, p.197). Organizations collect, comprehend, communicate and control flows of environmental information to deal with foreseen and unforeseen issues. According to various researches, the success of an organization is based on the organization's collective knowledge about its "process capabilities and the abilities to learn and share this knowledge effectively" (Parnisto, 1995, p.154). Sharing information is imperative for work coordination and cooperation in an organization. ... Managers facilitate organizational communication Communication plays an essential role in achieving managerial and organizational goals and objectives effectively. Communication is essential to inform employees of their goals, to compare with co-workers' performance, and for assessing employees' overall performance. Managers, through appropriate channels of communication, give instructions to subordinates and receive information. Managers interpret this information and communicate the same to the employees. To do this, managers should have good communication and interpretation skills, as, ultimately, the employees' interpretation of information depends on the accuracy of the managers' comprehension of the information and the effectiveness of their communication ("Managing communication," 2004, p.264). Role of communication in decision-making Managers take decisions that often have a major impact on the organization and its members. Making relevant and sound decisions is greatly dependent on the availability of accurate and timely information ("Managing communication," 2004, p.264). The length of the communication chain is a significant factor that affect the accuracy and timeliness of the information received. The more the number of links in the communication chain, the more the probability is of the information being distorted. Similarly, the longer the communication chain, the less the chances are of getting the information on time. Economic recession and competitive pressures have driven several organizations to reduce the number of managerial levels in the organizational hierarchy, thus facilitating more effective

Religious Practices and Ideas Essay Example | Topics and Well Written Essays - 500 words

Religious Practices and Ideas - Essay Example First, for intrinsic concerns. This is to appreciate how particular religious expressions can reinforce their own historical, social settings. The second reason is to consider how it may also encounter our own understandings of the day to day world (Brown et al. 73). The Roman Catholic Church and the reality of Catholicism, for instance, remain a massive and appreciated presence into the third millennium of history. Some of the questions that everyone might be asking him/herself are what are the backgrounds of the Catholic Church? How has it changed diverse cultural influences over the years? In religious events, the Catholic Church is known to speak in one voice. With that as an example than in our case introducing religious studies in our schools would play a good role in strengthening relationships in different nations (OCollins et al. 84). First, for instance, in his book Henrietta Harrison explores the modern background of a single Catholic Cave Gully town in Shanxi by intertwin ing some of the most important memories and tales of its inhabitants together. Harrison challenges are leading global antiquities of Christianity. In dissimilarity to storylines that tell a story of a Christian religion that was foreign to Chinese settings and acculturated or adapted in order to reimburse for this incommensurability; instead, he shows the important harmonies between Chinese and Christianity religious cultures (Harrison 27). Secondly, an introduction of religions i.e.  Judaism, Islam, Hinduism, and Buddhism in the schools would allow interaction  and be borrowing different practices of different cultures. For a broader view of hopes and aspirations of the Chinese people, it is acknowledged that China has borrowed generously from other neighboring cultures (Hodous 44).  

Managing Organizational Communication Essay Example | Topics and Well Written Essays - 4000 words

Managing Organizational Communication - Essay Example Improving listening skills and learning to use and interpret nonverbal cues and verbal communication will help effective communication. Effective feedback is essential to let employees know where they stand and direct them to help achieve organizational goals. Organizations are made up of groups which are again made up of individuals. For sharing of information and coordination of activities, communication is absolutely necessary between groups and individuals. Individuals exchange knowledge, ideas, feelings and emotions using written messages, spoken words and gestures. "Organizations survive by making sense of and giving sense to their environments" (Sutcliffe, 2001, p.197). Organizations collect, comprehend, communicate and control flows of environmental information to deal with foreseen and unforeseen issues. According to various researches, the success of an organization is based on the organization's collective knowledge about its "process capabilities and the abilities to learn and share this knowledge effectively" (Parnisto, 1995, p.154). Sharing information is imperative for work coordination and cooperation in an organization. ... Managers facilitate organizational communication Communication plays an essential role in achieving managerial and organizational goals and objectives effectively. Communication is essential to inform employees of their goals, to compare with co-workers' performance, and for assessing employees' overall performance. Managers, through appropriate channels of communication, give instructions to subordinates and receive information. Managers interpret this information and communicate the same to the employees. To do this, managers should have good communication and interpretation skills, as, ultimately, the employees' interpretation of information depends on the accuracy of the managers' comprehension of the information and the effectiveness of their communication ("Managing communication," 2004, p.264). Role of communication in decision-making Managers take decisions that often have a major impact on the organization and its members. Making relevant and sound decisions is greatly dependent on the availability of accurate and timely information ("Managing communication," 2004, p.264). The length of the communication chain is a significant factor that affect the accuracy and timeliness of the information received. The more the number of links in the communication chain, the more the probability is of the information being distorted. Similarly, the longer the communication chain, the less the chances are of getting the information on time. Economic recession and competitive pressures have driven several organizations to reduce the number of managerial levels in the organizational hierarchy, thus facilitating more effective

The Impact of Media on Behavior Essay Example for Free

The Impact of Media on Behavior Essay This chapter presents the background, problem statement, purpose, specific objectives, the scope and the significance of the study. This study intended to find out the relationship between parenting styles, mass media, peer pressure and the risk of teenage pregnancy among the youth using a case study of orphanage homes found in Rubaga division Kampala District 1.1: Background to the problem. Several past researchers have had interest in the relationship between parenting styles, mass media, peer pressure and the risk of teenage pregnancy among the youth in different contexts. For instance the research by Wingson (2009) was about the effects of mass media on teenager. He notes in this research that mass media has become part of everyone’s daily life. He adds that the development of technology is rapid in the world, from telegraph, radio, to TV, computer, mobile phone. He further noted that media makes the lives of the people at ease, along with Information and Communication Technologies they produce to increase the standard of living for the people to spend time. He concludes that, teenagers can easier to get mass media in computer. They can through computers to know different types of mass media that they want to have. Dr. Baumrind (1966) studied how parents responded to the needs of their children, parental responsiveness and how that determined a child’s  behavior. She also looked at how they demanded things from their children, in terms of their behavior. She used these two measures of parenting to form her seminal parenting styles theory, which would shape the voice of psychology and criminology well into the 1990’s. The research by Farinola, Donnerstein, (2001) was on sexuality and mass media. The research shows that sexual talk and displays are increasingly frequent and explicit in this mediated world. The research adds that sexual content that ranged from flirting to sexual intercourse had increased from slightly more than half of television programs in 1997-1998 to more than two-thirds of the programs in the 1999-2000 seasons, while the research of Rahaman Onike (2007) was social and health implications of teenage pregnancies. The research notes that the incidence of teenage pregnancy has become a global issue as a result of its consequence on population health, growth and development. Lastly Crystal, (1990) carried out research on the causes teenage pregnancies. His research shows that teenagers’ risky sexual behaviours are major factors which predispose them to unwanted pregnancies. He adds that non -perception of risks in their sexual behaviours and lack of adequate information about reproduction and sexual health issues are largely responsible for teenage pregnancies. The research concludes that sexual behaviours of the teenagers depend largely on societal constrictions and the level of cultural permissiveness which dictate the modes of sexual practices While much research concerning teenage pregnancy deals with either causal factors or prevention strategies, more information is needed about issues relating to parenting styles, mass media, peer pressure and the risk of teenage pregnancies. All these past researchers isolated the above relationship a gap the proposed study intends to fill. All in all, with the above theoretical and contextual gaps raised, a study of the relationship between parenting styles, mass media, peer pressure and the risk of teenage pregnancies is not only timely but also long overdue. In the context of this study, parenting style is seen as a psychological construct representing standard strategies that parents use bin their child rearing. There are many different theories and opinions on the best ways to rear, children, as well as differing levels of time and effort that parents are willing to invest (Wikipedea 2010). Many parents create their own styles from a combination of factors, and these may evolve overtime as the children develop their own personalities and move through life stages. A parenting style is affected by both the parents’ and children’s temperaments, and is largely based on the influence one’s parents and culture. However, for the purposes of this study, parenting style will be understood to refer to the way parents bring about their children. It will include the things that parents do to impart discipline and good behaviors in their children as accepted in the context of Uganda. According to Wikipedea (2008), mass media denotes a section of the media specifically designed to reach a large audience. The term was coined in the 1920s with the advent of nation wide radio networks, mass circulation of newspapers and magazines. However for the purposes of this research mass media will be used to mean news papers, magazines, radio stations and television programs related to issues of teenagers. In the context of this study, teenage pregnancy can be described as the pregnancy that occurs to the females between 13 – 19 years. This is more prevalent in Africa than other continents of the world. Akindele Oscar (1999) also defines teenage pregnancy as conception by children who are below the age of 21 resulting from either marital or pre-marital sex. Peer pressure refers top the influence exerted by a peer group in encouraging a person to change his or her attitude, values or behavior in order to conform to group norms Akindele Oscar (1999) 1.2: Statement of the Problem. According to Barnaba A (1998), youth peer pressure is one of the most frequently referred to forms of peer pressure. It is particularly common pressure because most young people spend large amounts of time in fixed  groups such as schools and sub-groups within them regardless of their opinion of those groups Meier (2008). In addition to this, they may lack the maturity to handle pressure from friends. Also, young people are more willing to behave negatively towards those who are not members of their own peer groups and relief from stress. They need to better understand their condition and choices for care. However, this is not the case for teenagers in most cases most vulnerable persons do not receive good parenting and in most cases they are more exposed to information without restriction. As a result most of the teenagers engage in more risky sexual behaviors they see in the magazines, in the news papers and on television. It is for this reason that this study sets out to investigate the relationship between parenting styles, mass media peer pressure and the risk of teenage pregnancies in Rubaga Kampala District 1.3:Purpose of the study The purpose of the study will be to establish the relationship to investigate the relationship between parenting styles, mass media peer pressure and the risk of teenage pregnancies in Rubaga Kampala District. 1.4:Objectives of the study 1.To establish the relationship between parenting styles and teenage pregnancies 2.To establish the relationship between mass media and teenage pregnancies. 3.To establish the relationship between peer pressure and teenage pregnancies. I.5:Research questions 1.How do parenting styles contribute to the risk of teenage pregnancies? 2.What is the contribution of mass media on the risk of teenage pregnancies? 3.How does peer pressure contribute to teenage pregnancies? 1.6:Scope of the study The study will be conducted in five selected orphanage homes found in Rubaga division of Kampala. Rubaga Division has five orphanage homes namely Sanyu Babies home, Nalukolongo, Hope Orphanage Home, Wakhissa Ministries, Cobap Nakulabye Project. Rubaga Division is selected because of its location in the heart of Kampala district and being a division with many community based  organizations. The content scope of the study will be based on the relationship between parenting styles, mass media, peer pressure and the risk of teenage pregnancies. 1.7:Significance of the study The findings of the study could be of value to Rubaga division residents because the research will help them identify strategies which can work for them as regards combating teenage pregnancies. To future researchers, the results of the study may support future researchers in having a basis for comparison of parenting styles and teenage pregnancies. Civil Society Organizations (CSOs) could find the study useful because it would enable them lobby policy makers and government to provide appropriate community services as regards the youth. To the youth, the results of the study will help them on knowing the best strategies of avoiding teenage pregnancies. Media houses may find it useful as it may help them in choosing the best programs for the youth. 1.8:Conceptual Frame work Fig 1: A conceptual framework showing the relationship between parenting styles, mass media, peer pressure and the risk of teenage pregnancies among the youth. The conceptual framework shows that parenting styles mass media influence and peer pressure have got an impact on the youth that in turn make the youth prone to pregnancies. CHAPTER TWO LITERATURE REVIEW 2.0:Introduction Teenage pregnancy has become a growing concern nowadays and hence it has become imperative to look into the various causes of teenage pregnancy in  order to deal with this issue carefully. Teenage pregnancies are widely discouraged because the of health risks they raise for the young mothers and their babies. This problem is more prevalent in developed countries, particularly USA. As the name itself indicates, teenage pregnancy refers to pregnancy in young girls, mostly aged 13 to 17 years. Pregnancy at such a tender age is primarily due to lack of sex education. Lack of awareness about the causes and effects of teenage pregnancy is more often than not, a result of lack of proper communication between teenagers and their parents. Therefore, it is the duty of the parents to impart adequate sex education and education regarding reproductive health to their adolescent sons and daughters so that their children become aware of the various aspects related teenage sex and pregnancy. Schools and society also need to emphasize the risk factors associated with unprotected sex as well as the outcomes of unplanned teenage pregnancy, not to mention the significance of moral and ethical values. Lack of sex education is the most important but not the only cause of teenage pregnancy. Following are some other teenage pregnancy causes that can not be ignored. Teenage pregnancies create a host of other problems like incomplete education, unemployment, poverty, social embarrassment and numerous other emotional traumas. Further, early motherhood also affects the psychological development of the child adversely. Besides, bodies of teenage girls are not as developed as those of adult women in terms of childbearing, therefore they are likely to face certain complications as well. Moreover, the chances of maternal death can not be ruled out. Therefore, analyzing the various causes of teenage pregnancy can help a great deal in addressing this issue effectively and eventually reduc ing the cases of teenage pregnancies. 2.1:Parenting styles and the risk of teenage Pregnancy among the youth Despite what teens may say, their parents do play a critical role in determining what influences them. In many ways, parental behavior and the nature of the parent/teen relationship influences a teens decision to smoke, take drugs, become sexually active, and use contraception. Parental behavior can also affect teenagers choices to join a gang or participate in criminal activity. As a parent, you play a vital role in helping your child avoid risky behaviors. Actively listening to what your teen has to say will pave the way for conversations about topics that concern you, but setting harsh, unbending  rules may only drive your teen toward negative choices. If parents have a dominating parenting style and arent knowledgeable about their teens activities and interests, it is more likely that their teen will engage in risky behaviors. On the other hand, teens who report feeling connected to their parents are the least likely to engage in risky behaviors. Obviously, the reason at the base of any pregnancy is sexual intercourse. But several researchers would like to know why the phenomenon of teenage pregnancy is so widespread. The easiest answer is making an analysis of the relationship between parenting styles and the sexual behaviors that cause teenage pregnancies among the youth. Parents employ several strategies to influence the sexual behavior of their adolescent children. Parenting styles, parental communication and expectation and role modeling have an impact on the likelihood of teenage pregnancy. The influence of parenting strategies on teenage pregnancy is similar for male and female youth because pregnancy comes as a result of sexual intercourse between the two. Therefore teen pregnancy prevention programs should emphasize helping parents develop effective discipline coupled with warmth and support and high educational expectations. Research has shown that one of the causes of teenage pregnancy is the lack of a sense of personal responsibility for their own actions, lack of maturity, and most importantly a lack of knowledge regarding sexual intercourse and contraception. Related to this, teen pregnancy is often closely associated with poverty, limited education and employment opportunities. 52% of teenagers admit not understanding sex or birth control and this is a reflection of one of the most fundamental causes of teenage pregnancy, ignorance. Indeed, teens in North America, especially girls, are bombarded with mixed messages concerning intercourse. Sex is seen as immediate gratification with no consequences, but preparing for sex makes a girl promiscuous. Sex is seen all over the television and in videos, but equal treatment for birth control methods is completely absent. Open discussions about intercourse are very rare. If an adolescent girl experiences low expectations for her future or lack of control over her life, she is more likely to get pregnant. Depression in general is another one of the causes of teenage pregnancy, leading girls to engage in risky sexual activity. Abuse of alcohol or drugs also leads to poor choices about sex and contraception, often ending up in pregnancy. Growing up in a family  without an adequate amount of love or a father figure may also be one of the causes of teenage pregnancy; an adolescent girl will fall prey to the attentions of an older man in the hopes of receiving affection. Most girls are pressured by their boyfriends into having intercourse because they believe this will make their b oyfriends love them more. There is a relationship between teenage pregnancy, sexual behavior, and family type. Students from lone parent and/or teenage mother initiate families more commonly report sex, lack of contraception at first sex, and/or conceptions by age 15/16, and such associations can be explained by low parental strictness, difficult parent-child communication, and/or low parental input into sex education. Girls and boys from lone parent families or having mothers who are teenagers when they were born are more likely to report sex but not lack of contraception at first sex by age 15/16. Girls and boys with mothers having them as teenagers, and boys but not girls from lone parent families, are more likely to report being involved in conceptions by age 15/16. Teens say their parents influence their decisions about sexual activity more than any other source, according to a survey conducted by the National Campaign to Prevent Teen Pregnancy. Also, when asked where they learned the most about preventing teen pregnancy, more teens said parents than friends or the media. Most studies show that the risk of teen pregnancy is reduced by open communication with parents, sharing of family values, and parental involvement in teens lives. Teenagers are less likely to start having sex when their mothers are deeply involved in their lives and successfully communicate their values on sex. Research has shown that stressing abstinence to teens is best, but also talking to them about contraception is not viewed as a mixed message by 70% of adults and by 80% of teens. Boys may be more influenced by fathers, siblings and peers on their decision to have intercourse. In a loving, supportive, and open way, parents need to communicate their feelings on premarital sex clearly to their teen in order to help their teen make important decisions regarding sex. The absence of positive family interaction and parental support, such as emotional support, closeness, and communication, can lead to a wide variety of risky behaviors among teens. Parents need to talk to their teens, consistently set rules and expectations for their teens behavior, and monitor what their teen does. Parents can support positive peer  relationships by giving their teenagers their love, time, boundaries, and encouragement to think for themselves. Previous research has attributed a girls increased risk of pregnancy to the possible consequences of a father leaving lower family income, conflict at home and weak parental monitoring. Girls whose fathers left either before they were born or up to age 5 were seven to eight times more at risk of becoming pregnant as an adolescent than girls living with their fathers. A fathers departure between ages 6 to13 suggested a two to three times greater risk of becoming pregnant. Having no father usually means less household income and a greater chance of other disadvantages, such as domestic violence or a depressed mother. Sometimes parents need help talking to their children about such difficult topics as teenage sexuality and pregnancy prevention. Teenage pregnancy prevention must be a way of life and a natural and integral way of thinking for children as the actions that lead to or away from teenage pregnancy lies squarely, and at the end of the day, solely with their teenage children. Children will be greatly influenced by the parental example that has been given them to follow is clear, but they will have to decide for themselves what actions they will take in any given circumstance. Sometimes parents need help talking to their children about such difficult topics as teenage sexuality and pregnancy prevention. Teenage pregnancy prevention must be a way of life and a natural and integral way of thinking for children as the actions that lead to or away fr om teenage pregnancy lies squarely, and at the end of the day, solely with their teenage children. Children will be greatly influenced by the parental example that has been given them to follow is clear, but they will have to decide for themselves what actions they will take in any given circumstance. A child who can openly and honestly speak with their Parents about anything and everything literally has the greatest single gift, and the largest possible safety net, a Parent can provide to their child. Children need to know how Parents feel about sex. They need to know the reasons for and against engaging in sexual behaviors and the possible consequences regarding each course of action. Discuss your views about sex and its proper time and place in a healthy and happy life. Parents should just start talking and see where the conversation takes them. Children are taught in school the importance of safe sex and the use of condoms to prevent an unwanted pregnancy and/or sexually transmitted  diseases, including AIDS. Parents should ensure their children understand these issues even if the plan is for their children to not be sexually active at this time in their lives. Having a clear understanding of safe sex practices can prevent a teenage issue that leads to sex from being a larger and more damaging issue than it has to be. Parents need to know who their children are spending time with. They should get to know their children’s friends and their friend’s family. Friends who share common thoughts and beliefs are more likely to support children in wholesome and proper activities. In the parenting style taken up by the parents, there should be clear family rules regarding the age at which our children can start dating, and those first dates should be group events engaged in wholesome activities. Parents should also realize that the risk of teenage pregnancy increases dramatically when girls date boys who are 1 to 3 years older than they are. Parents who can help their children see a bright future are the same Parents who are helping the cause of teenage pregnancy prevention. The chances of teenager delaying sexual activity are greatly increased if their futures appear bright, they have goals for their future, and they can see how proper behavior and correct actions will help them get to where they want to go in life. Teenagers who are active and successful in school are more likely to have a clear vision for their future, and hence avoid behavior that could put at risk the future they want to achieve. Parents should help their children to believe in themselves, to have a healthy self-image and positive self-esteem and enjoy a solid vision for their happy tomorrows. Parents should help teenagers to see that their choices of today will directly affect their tomorrows. Having that clear vision of a bright and hopeful future makes teenage pregnancy prevention a logical and welcome avenue to the future life our children desire so desperately to enjoy. Some parents help children know their parts and to learn their lines well, so that when the action scenes of their lives are lived they can be the hero of their own stories and avoid the heart ache scenes that don’t have to be a part of their productions. 2.2:Mass media and the risk of teenage pregnancies among the youth. Mass media is designed to reach large audiences with technology. Its purpose is meant to give us entertainment and information we need to act as a society. Media is everywhere; there is no escaping from it. Almost every home in urban areas has at least one TV, the  internet, and a cell phone. There are more forms of media available today than ever before; consequently, teens are exposed to a lot of information. The media is supposed to portray what is normal; therefore, it affects what society considers normal. Teens are much more impressionable then adults. What the media tells them is normal affects them more. The media’s portrayal of body image affects teens negatively through using stereotypes, encouraging sexual behavior, and promoting unnecessary products. The media portrays single parent homes, teen pregnancy, and the social issue that America faces in a positive light. Music Television (MTV) has several shows which portray teen pregnancy as a positive attribute of life: Teen Mom and 16 and Pregnant. Teen Mom is an American reality television series that premiered on MTV on December 8, 2009. The perceived sensitivity of sex as a research topic and a focus on television t o the exclusion of other media unfortunately has restricted the kind of research that has been done. Much of the empirical work has been analyses of content that allow only speculation about what effects the content might have on audiences. But an emerging set of studies that go beyond content to address how audiences select, interpret, and apply sexual content suggests that the media may play an important role, especially for young people Steele, (1999). The mass media are an increasingly accessible way for people to learn about and see sexual behavior Wikipedea, (2010). The media may be especially important for young people as they are developing their own sexual beliefs and patterns of behavior and as parents and schools remain reluctant to discuss sexual topics Roberts, (2000). In the United States, young people spend 6 to 7 hours each day on average with some form of media. A national survey in 1999 found that one third of young children (2 to 7 years old) and two thirds of older children and adolescents (8 to 18 years old) have a television in their own bedroom. Many of those televisions also are hooked up to cable and a Videocassette Recorder (VCR) (Roberts, 2000). Sexual talk and displays are increasingly frequent and explicit in this mediated world. One content analysis found that sexual content that ranged from flirting to sexual intercourse had increased from slightly more than half of television programs in 1997-1998 to more than two-thirds of the programs in the 1999-2000 season. Depiction of intercourse (suggestive or explicit) occurred in one of every 10 programs (Kunkel, Cope-Farrar, Biely, Farinola,   Donnerstein, 2001). Many teens admit that sexualized content in film, television and music helps influence them to engage in sexual activity before they are ready. One fifth to one half of music videos, depending on the music genre for example country, rock, rap portray sexuality or eroticism DuRant et al., (1997). Two thirds of Hollywood movies made each year are R-rated; most young people have seen these movies long before they are the required 16 years old Greenberg et al., (1993). Although teen girls and womens magazines, such as Seventeen and Glamour have increased their coverage of sexual health issues over the past decade, the majority of advertising and editorial content in these magazines remains focused on what girls and women should do to get and keep their man Walsh-Childers, Gotthoffer, Lepre, ( 2002). The Internet has increased dramatically the availability of sexually explicit content. Computer and Internet use is diffusing more rapidly than any previous technology; as of the end of 1999, more than half (56%) of all adults in the United States were online. It is expected that by 2010 most U.S. homes with children will have access to the Internet Taylor, (1999). The word sex is the most popular search term used on the internet today Cyber Atlas, (2001). The internet may have both positive and negative effects on sexual health. According to one national survey of young people (10-17 years old) who regularly used the internet, one out of four said he or she had encountered unwanted pornography in the past year, and one out of five had been exposed to unwanted sexual solicitations or approaches Finkelhor, Mitchell, Wolak, (2000). At the same time, a number of sites, such as the American Social Health Associations iwannaknow.org, promote healthy sexual behavior and provide young people with advice on communication in relationships as well as methods for protecting against sexually transmitted diseases. Despite increasing public concern about the potential health risks of early, unprotected sexual activity, most of the mass media rarely depict three Cs of responsible sexual behavior: Commitment, Contraceptives, and consideration of Consequences. Although more than half of the couples who engage in sexual intercourse on television are in an established relationship, 1 in 10 are couples who have met only recently; one quarter do not maintain a relationship after having sex Kunkel et al., ( 2001). Only about 1 in 10 of the programs on television that include sexual content  mentions the possible consequences or the need to use contraceptives or protection against STDs. Unintended pregnancies rarely are shown as the outcome of unprotected sex, and STDs other than HIV/AIDS are almost never discussed Kunkel et al., (2001). Abortion is a taboo topic, too controversial for commercial television and magazines Walsh-Childers et al., (2002). The urge to have sex and get pregnancy is now stronger because of the fact that one has an encounter with media. There are teenagers who are getting pregnant just to be on these reality television shows.Teen sexuality is influenced by the mass media today more than any other time in history. Internet, television, music video and sexually explicit lyrics all contribute to adolescents’ attitudes and behavior concerning sexual activity. Only 9% of the sex scenes on 1,300 of cable network programming discusses and deals with the negative cons equences of sexual behavior. The Internet and the anonymity therein allow adolescents real concerns relating to false information on health issues, sexuality, and sexual violence in the world of intimate sexual relationships. In 2006, a survey conducted by The Observer in Britain showed that most adolescents in Britain were waiting longer to have sexual intercourse than they were only a few years earlier. In 2002, 32% of teens were having sex before the age of 16; in 2006 it was only 20%. The average age a teen lost his/her virginity was 17.13 years in 2002; in 2006, it was 17.44 years on average for girls and 18.06 for boys. The most notable drop among teens who reported having sex was 14 and 15 year olds. One group of Canadian researchers found a relationship between self esteem and sexual activity. They found that students, especially girls, who were verbally abused by teachers or rejected by their peers, were more likely than other students to engage in sex by the end of the Grade 7. The researchers speculate that low self esteem increases the likelihood of sexual activity: low self-esteem seemed to explain the link between peer rejection and early sex. Girls with a poor self-image may see sex as a way to become popular, according to the researchers. 2.3:Peer Pressure and the risk of teenage Pregnancy among the youth The incidence of teenage pregnancy in relationship with peer pressure has become a global issue as a result of its consequence on population health, growth and development. It is undoubtedly a worldwide concern since the Cairo  international conference on population and development held in 1994 has raised it as an issue among others. Teenagers are children who fall within the chronological age of twelve to nineteen years. Teen, of course, is a period when a child begins to develop secondary sexual characteristics, started to assume higher social responsibilities and started to express sexual feelings and desires. This is a delicate period in the life of the children for all physical changes have great impacts on the psychological functioning of the child. Teenagers’ risky sexual behaviours are major factors which predispose them to unwanted pregnancies. Non perception of risks in their sexual behaviours and lack of adequate information about reproduction and sexual health issues are largely responsible for teenage pregnancies. Sexual behaviours of the teenagers depend largely on societal constrictions and the level of cultural permissiveness which dictate the modes of sexual practices (Crystal, 1990). Biological determinants, socialization agents such as family, peers, religious institutions and mass media have powerful repressive effects on teenagers’ sexual behaviours. An adolescent female in need of money is likely to be tempted to engage in pre-marital sex by friends who come from rich families or those that use sexual activity to get money and this could result into incident of unwanted teenage pregnancy. Students whose parents are low income earners face the higher risk of engaging in pre-marital sex and this could eventually lead to teenage pregnancy and increase in drop out rate of school. Lack of adequate knowledge of sexuality education accounts for increase in teenage pregnancies. This is because; information about sex is got from peers who may also be less knowledgeable. Knowledge of sexuality education is essential to the development of right sexual attitudes and behaviours. When adequate and accurate information are not available, many teenage students would accept miss-information for truth. Peer group influence is another factor that predisposes teenagers to early and unwanted pregnancies. According to the result of the study conducted by Oladepo and Akintayo (2001), peer group influence was ranked first among the causes of teenage pregnancies. Free mixing of the opposite sex also linked with prevalence of teenage pregnancies. Akinboye (1982) in his contribution states that unrestricted interactions and social activities regularly involving male and female adolescents tend to create an atmosphere for inter-personal  affection, love and even result into sexual activities. Peer influence on the youth sometimes is related to going out or visiting different places where one may learn risky behaviours. Watching sexual stimulating magazines and movies may expose the teenagers to early sexual life and unwanted pregnancies. Participating in nude festivals and watching of pornographic films and images on the internet are also risk factors. Family instability and disorganisation which may be caused by poverty, lack of mutual trust and understanding between parents may cause child neglect and consequently could result into teenage pregnancy and increase in drop out rate of the school. Legalization of abortion and early exposure to sexual life can cause teenage pregnancy. According to the report of a study conducted in Nigeria by Nicholas in 1986, he found out that 24.4 per cent of the girls by the age of 15 years have had sexual intercourse, 63 per cent by 18 years while half of the Nigerian females have become mothers before the age of 20 years. Peer influence is also directly and indirectly related to pre-mature drop out of school which is also a factor which predisposes female students to fall a victim of teenage pregnancy. The drop-out female students after leaving the school due to one reason or the other find it difficult to cope with life; so, took to hawking and in the process may get impregnated. In this case friends may influence one to get married or to join businesses. CHAPTER THREE RESEARCH METHODOLOGY 3.0:Introduction This chapter presents the research design, population, sampling strategies, data collection methods, data collection instruments, data quality control, data collection procedure and data analysis that will be used in the study. 3.1:Research design The study will use an explanatory survey design that will be quantitative and descriptive in nature. This design was chosen because it can appropriately investigate the relationship between parenting styles, mass media, peer  pressure and the risk of teenage pregnancy among the youth in orphanage homes in Rubaga Division of Kampala District. Orphanage homes are chosen because, in most cases these are the places where the children who are victims of unwanted pregnancies are taken for care. 3.2:Area of study The study will be conducted in Rubaga Division in Nakulabye Parish that is COBAP Nakulabye, Nalukolongo Orphanage home, Sanyu Babies home in Namirembe Bakuli Parish, Hope Orphanage home and Wakhissa Ministries in Bakuli. Five orphanage homes will be randomly selected as they are the only orphanage homes available in the area of study. The researcher will also go to 3 radio stations in the area of study that is Super FM, Central Broadcasting Service and Ssuubi FM. 3.3:Study population The study will involve 60 care providers and employees of the orphanage homes at least 12 from each of the selected orphanage homes. 15 employees of radio stations in the area of study will also be used to answer questionnaires. At least 5 employees from each radio station that is Super FM, Central Broadcasting Service and Ssuubi FM. The researcher will target presenters of those programs related to the topic of study. Children from the orphanage homes are left out because in most cases they are young and below 18. The researchers may even seek for secondary data from the records available. Questionnaires will be used for they are to bring out concerns and needs of the target population in relation to the care providers and children under care. The care providers are chosen because they are in direct administration of the affairs regarding the children and they are equipped with information about unwanted pregnancies 3.4:Data collection The main instruments for data collection were interview guides and questionnaires. Questionnaires will be administered to collect data about the relationship between parenting styles, mass media, peer pressure and the risk of teenage pregnancy among the youth in orphanage homes in Rubaga  Division of Kampala District. 3.5:Procedure and data collection The researcher obtained an introduction letter from the department of Mental Health and Community Psychology from her supervisor. The researcher then will approached the administrators of the five orphanage homes and the three radio stations and introduced herself with the help of the letter. The researcher then will ask for permission to conduct research in these organizations and their areas of operation. The different respondents, service providers are to be requested to consent before the questionnaire is administered on to them. Informed consent will sought after the respondents are assured that the research findings are to be treated as confidential. 3.5:Data analysis Data collected will be edited, categorized or coded and organized in themes and there after it will be analyzed in line with the objectives set at the beginning of the study. For the quantitative data, tally method will be used manually, similar responses will be grouped together to ascertain the number and percentage of respondents who came up with similar views. For qualitative data, views and opinions of respondents will grouped, analyzed and established if they have a bearing on the relationship between parenting styles, mass media, peer pressure and the risk of teenage pregnancy among the youth. All this will be done by use of frequency tables and tabulations at the level of report writing and presentation. 3.6:Limitations of the study 1Willingness of the organization management to allow the researcher to use the premises during the research period. This is because sometimes information broadcasted is kept confidential and people are keen on exposure. 2The results of the study may depend on some respondents’ willingness to answer the asked questions 3Literature available about the subject may be limited and difficult to access. 3.7:Ethical considerations Informed consent will be sought after the respondents are assured that the  research findings are to be treated as confidential. Participation in the study will be voluntary and individuals will be free to participate or not to participate even withdrawing from the study will be accepted. Since there is a lot of stigma attached to unwanted teenage pregnancy, only individuals who are willing to disclose will be studied. Information will not be tied to individuals to ensure there is no personalization of issues discussed. The researcher will not disclose the names of the radio stations and orphanage homes. References Ogun State/UNFPA (1998) Gateway Reproductive health: News and views – vol. 1 No.8 Awoniyi A. (1985) Child study educational practice: Nigeria, Macmillan Publishers Ltd. Lagos. Barnaba A. (1988) Parenting styles and adolescent behaviours: Lagos, Spring Publishers. Fayombo G.A. (2004) Human Development across life span: Ibadan, Alafas Nigeria Company. Fieldman R.S (2000) Essentials of understanding psychology: Boston, McGraw Hill. ARFN (2001) Helping youths cope with their adolescent years: Youth Scope (1), 1-6. Azuzu M.C. (1994) Human Sexuality: A primer: Ibadan, Ambassador Publications. Crystal C.D (1990) School Health and Practice: Lagos, Vantage Publishers. Akinboye, J.O. (1982) Strategies for handling adolescent and youth problems: Department of Guidance and Counselling, University of Ibadan. Jekel (1977) Primary and Secondary prevention of adolescent pregnancies – Journal of Nigerian School Health 41. Taylor N.W. (1999) A textbook of Hygiene for teachers in West Afr ica: London, Longman and Green Publishing Company. Manlove J. Early motherhood in an intergenerational perspective: the experiences of a British cohort. J Marriage Fam1997;59:263–79. Botting B, Michael Rosato, Wood R. Teenage mothers and the health of their children. Popul Trends1998;93:19–28. Ermisch J, Pevalin D. Who has a child as a teenager? ISER Working Paper 2003/30. Colchester: Institute for Social and Economic Research, University of Essex, 2003. Dearden K, Hale C, Blankson M. Family structure, function and the early transition to fatherhood in Great Britain: identifying antecedents using longitudinal data. J Marriage Fam1994;56:844–52. Ellis BJ, Bates JE, Dodge KA, et al. Does father’s absence place daughters at special risk for early sexual activity and teenage pregnancy? Child Dev 2003;74:801–21. Woodward L, Fergusson DM, Horwood LJ. Risk factors and life processes associated with teenage pregnancy: results from a prospective study from birth to twenty years. J Marriage Fam2001;63:1170–84. Kiernan K. Transition to parenthood: young mothers, young fathers—associated factors and later life experiences. Welfare State Programme Discussion Paper WSP/113. London: London School of Economic, 1995. Barber JS. The intergenerational transmission of age at first birth among married and unmarried men and women. Soc Sci Res2001;30:219–47. Kahn JR, Anderson KE. Intergenerational patterns of teenage fertility. Demography1992;29:39–57. Wellings K, Nanchahal K, Macdowall W, et al. Sexual behaviour in Britain: early heterosexual experience. Lancet 2001;358:1843–9. Miller BC, Benson B, Galbraith KA. Family relationships and adolescent pregnancy risk: a research synthesis. Dev Rev2001;21:1–38. Taris TW, Semin GR. Parent-child interaction during adolescence, and the adolescent’s sexual experience: control, closeness and conflict. J Youth Adolesc1997;26:373–98. Lewis O. La Vida: a Puerto Rican family in the culture of poverty—San Juan and New York. London: Secker and Warburg, 1967. Joseph K. Caring for people. London: Conservative Political Centre, 1972. Murray C. The emerging British underclass. London: Institute of Economic Affairs, 1990. Murray C. Underclass: the crisis deepens. London: Institute of Economic Affairs, 1996. Welshman J. The cycle of deprivation and the concept of the underclass. Benefits2002;10:199–205. Rutter M, Madge N. Cycles of disadvantage. London: Heinemann, 1976. Denham A, Garnett M. From the cycle of enrichment to the cycle of deprivation. Benefits2002;10:193–8. Stephenson JM, Strange V, Forrest S, et al. Pupil-led sex education in England (RIPPLE study): cluster-randomised intervention trial. Lancet 2004;364:338–46. Oakley A, Rajan L. Social class and social support: the same or different? Sociology1991;25:31–59.

Air Conditioner Using Engine Exhaust Heat

Air Conditioner Using Engine Exhaust Heat This paper describes the development possible in the field of vehicle air conditioning based on vapour absorption cooling. The cooling effect is produced by waste heat energy recovered from engine exhaust. The advantages of such a system are drastic reduction of fuel over consumption and emissions associated with vehicle air conditioner usage. The current air conditioning system used in automobile is based on vapour compression cycle which necessarily consists of a compressor driven by engine output and thus increases fuel consumption rate and pollution proportion. The introduction of vehicle air conditioning using vapour absorption cycle eliminates the need for compressor; here compressor is replaced by generator and absorber unit. Engine waste heat from exhaust gases is used as heat source for generator of vapour absorption system. This paper describes the development possible in the field of vehicle air conditioning based on vapour absorption cooling. Some limitations are outlined and suggestions for future improvement are pointed out. Keywords Vapour Absorption Refrigeration Cycle, Vapour Compression Refrigeration Cycle. Introduction Motivating factors for the designing this system is continuous optimization of the performance of internal combustion engines and the increasing utilization of air conditioning in vehicles, as it reaches the status of essential need for modern life. Internal combustion engines are potential energy sources for absorption refrigeration systems, as about one third of the energy availability in the combustion processes wasted through the exhaust gas. Thus, use of the exhaust gas in an absorption refrigeration system can increase the overall system efficiency. An automobile engine utilizes only about 35% of available energy and rests are lost to cooling and exhaust system. If one is adding conventional air conditioning system to automobile, it further utilizes about 5% of the total energy. Therefore automobile becomes costlier, uneconomical and less efficient. It also decreases the life of engine and increases the fuel consumption. For very small cars compressor needs 3 to 4 bhp, a significant ratio of the power output. Keeping these problems in mind, a car air conditioning system is proposed from recovery of engine waste heat using engine exhaust as source of generator for VARS. Introduction to VARS: Figure 1 Schematics of Ammonia Water Absorption Refrigeration System Fig. 1 shows a schematic of the basic aqua-ammonia refrigeration cycle. High pressure ammonia vapor enters the condenser, where it transfers heat to the neighborhood. Liquid ammonia leaves the condenser and passes through an expansion valve, reaching the evaporator pressure. The refrigerant then enters the evaporator, where it receives heat from the cold source, turning into low pressure vapor. In the sequence, ammonia vapor enters the absorber, where a weak solution of water and low concentration ammonia absorbs the refrigerant and, at the same time, transfers heat to the neighborhood. The solution has now a high ammonia concentration, and is pumped to the vapor generator, where it receives heat from an external source. The ammonia in the solution then evaporates, separating from water and flowing to the condenser to start a new cycle. A weak water-ammonia solution leaves the vapor generator and enters the absorber to absorb ammonia vapor from the evaporator. A heat exchanger betwee n the absorber and the vapor generator transfers heat from the weak solution leaving the vapor generator to the high ammonia concentration solution going into the vapor generator. The coefficient of performance (COP) of the absorption system is usually much lower in magnitude then the compression system. But this low value of the former is not of much importance since it uses the waste heat such as engine exhaust heat. The most important thing about VARS is even if the evaporator temperature falls, the same COP can be maintained by elevating the generator temperature .Hence the capacity of the system remains almost the same. Design procedure of heat extraction device: Since VARS is heat operated cycle we need heat extraction device to extract heat from high temperature source and to deliver this heat to the generator of system. In order to enhance the performance of the refrigeration cycle we need to optimize the design of the Heat Extraction device. Because of its simplicity in operation, less installation as well as maintenance cost, we select Heat Exchanger as heat extraction device. C:UsersLENOVODesktopA4heatex.jpg Figure2- Schematic of Heat Exchanger In order to find the dimensions of the Heat Exchanger we have to assume certain cooling capacity of the cooling system. Lets assume it as 2.5 kW that is Qref = 2.5 kW. Calculations for Heat Extraction Device that is in our case a Heat Exchanger are as follows Calculation for Ammonia site: Calculation of mass flow rate Qref = à ¡Ã‚ ¹Ã‚ *cp*(Tg Te ) (1) Where , cp specific heat capacity Tg Temperature of the generator Te Temperature of evaporator à ¡Ã‚ ¹Ã‚  Mass flow rate From this equation we can determine mass flow rate of refrigerant. Calculation of velocity à ¡Ã‚ ¹Ã‚ =A*v*à Ã‚  (2) Where, à Ã‚  = density of the refrigerant (taken from design data book) A Flow Area for Refrigerant Ammonia In order to find A we have to take diameter of the tube according to availability in the market. v is the velocity of the refrigerant . Calculation of Reynolds number Re = (à Ã‚ *v*D)/ µ (3) Where D = diameter of the refrigerant tube  µ = dynamic viscosity of refrigerant at mean temperature (taken from design data book) Calculation of Prandtl number Pr = ( µ*Cp)/ k (4) Where, Cp = specific heat of the refrigerant k = thermal conductivity of the refrigerant Calculation of Nusselt number Calculation of the Nusselt number is based on the co-relations and the selection of the co-relation is based on the magnitude of the Re ,Pr , and the nature of the heat transfer surface. In our particular condition we select Gnielinski co-relation, since it involves less uncertainty (6%) so mathematical result will be more accurate. Nu = ((Æ’/2)* (Re 1000)*Pr)/ (1+12.7* (Æ’/2)1/2*((Pr)2/3 1)) (5) Where, Æ’ = friction factor its value depends on the Re Æ’= 0.079(Re)-0.25 4*103 Æ’=0.046(Re)-0.2 3*104 Calculation of convective heat transfer co-efficient Nu = (hr*D)/k (8) Where, hr = Convective heat transfer co-efficient k = Thermal conductivity of the ammonia Similar way we can find out these parameters for exhaust gases by following the same procedure. Calculation of Log Mean Temperature Difference (LMTD) à ¢Ã‹â€ Ã¢â‚¬  Tm = (à ¢Ã‹â€ Ã¢â‚¬  T1-à ¢Ã‹â€ Ã¢â‚¬  T2) / ln(à ¢Ã‹â€ Ã¢â‚¬  T1/à ¢Ã‹â€ Ã¢â‚¬  T2) (9) Where, à ¢Ã‹â€ Ã¢â‚¬  T1 = Temperature difference between the exhaust inlet temperature and refrigerant exit temperature à ¢Ã‹â€ Ã¢â‚¬  T2 = Temperature difference between exhaust outlet temperature and refrigerant inlet temperature Calculation of Total Thermal Resistance Qref =U*A *à ¢Ã‹â€ Ã¢â‚¬  Tm (10) Since à ¢Ã‹â€ Ã¢â‚¬  Tm / Qref is the total thermal resistance we will get the value of 1/ U*A Calculation of the length of heat exchanger Rtotal = Rconv.+Rcond.+Rconv. (11) 1/(U*A)= 1/(he*A) + (ln( ro/ri)) /(2à Ã¢â€š ¬*L*k) + 1/(href*A) (12) Where, he = Convective heat transfer coefficient of the exhaust gasses href = Convective heat transfer coefficient of the refrigerant A = Heat Transfer Area From equation (12) we can easily calculate optimum value of the length of heat exchanger. Now Effectiveness of Heat Exchanger changes as Inlet Temperature Difference between hot exhaust gases and cool refrigerant varies. Effectiveness of Heat exchanger can be calculated by following procedure. Calculation of the effectiveness of the heat exchanger In case of the counter flow the effectiveness Ɇº is given by Ɇº = (1-EXP((-1+C)*NTU) /(1- C* EXP( (-1-C)*NTU)) (13) Where, NTU = Number of Transfer Unit NTU = (U*A)/(à ¡Ã‚ ¹Ã‚  * CP)min. (14) C = Capacity Ratio C = (à ¡Ã‚ ¹Ã‚  * CP)min / (à ¡Ã‚ ¹Ã‚  * CP)max (15) Calculation of amount of heat transfer to the generator Ɇº = (actual heat transfer / maximum heat transfer) (16) Maximum heat transfer Qmax = à ¡Ã‚ ¹Ã‚ *CP*à ¢Ã‹â€ Ã¢â‚¬  Tmax (17) Where, à ¢Ã‹â€ Ã¢â‚¬  Tmax = Maximum temperature difference between hot exhaust gases and cold refrigerant Using Equations (14) (15) we can calculate actual heat transferred to the generator of the VARS. Calculation of Coefficient of Performance (COP) of VARS COP= (Cooling Effect Produced / Heat Energy Input to Generator) (18) Since COP is the function of temperature we can calculate the COP by using following relation also, COP= (Te*(Tg-Ta))/ (Tg*(Ta-Te)) (19) Where Te = Temperature of the evaporator Tg = Temperature of the generator Ta = Temperature of absorber Results and Discussion: For optimization of design of heat extraction device, we need to determine and fix some parameters. Assume desired heat transfer to be 3 kW. Also we need to find out the specific temperature or temperature range of VARS generator so as to have optimum COP. Graph 1: Generator Temperature Vs COP of VARS From graph 1, it is clear that VARS system will have maximum COP in the generator temperature range of 118 °c (391 K) to 127 °c (400 K). Now we can fix the refrigerant outlet temperature. Furthermore we cannot reduce the exhaust gas temperature below certain level. Sudden drop in exhaust temperature will cause the exhaust gas to slow down. The drop in exhaust temperature can be accommodated by reducing the exhaust pipe diameter. After fixing the generator temperature i.e. , refrigerant outlet temperature, exhaust gas outlet temperature and refrigerant inlet temperature, the only parameter remaining is exhaust gas inlet temperature. Exhaust temperature varies with load conditions (no load to full load conditions) and driving conditions (idling to power mode). This results in to change in LMTD, due to which the overall heat transferred to refrigerant changes. As a result of change in exhaust gas inlet temperature the effectiveness of heat exchanger changes. As exhaust temperature increases effective heat transfer area required decreases as well as effectiveness of heat exchanger reduces. Optimum heat transfer area and effectiveness of heat exchanger is represented by graph 2. Graph 2: Optimum Heat Transfer Area, Effectiveness Vs Inlet Temperature Difference Effectiveness is the function of temperature difference between hot exhaust gases and cold refrigerant at inlet. As this temperature difference increases, effectiveness of heat exchanger decreases. Effectiveness of heat exchanger is not of prime concern. We can maintain the effectiveness to certain level by varying refrigerant inlet temperature by some means, for example, electric heating. It will maintain the temperature difference between two fluids at inlet. Small amount of energy will be utilized to elevate the refrigerant temperature. Prime concern of the study is to obtain desired cooling effect by utilizing exhaust waste heat. So effectiveness of heat exchanger can be compromised to certain level. Practically, COP of system will be much lower as compared to mathematically obtained values but sufficient to produce desired cooling effect efficiently. Graph 1 represents the theoretical values of COP obtained by equation (19). We have used these values to determine optimum generator temperature. After fixing the parameters of heat extraction device (Heat Exchanger), the practical values of COP are obtained by using equation (18). Graph 3 represents the practical values of COP. It is clear from graph 3 that as generator temperature rises from 118 °c to 127 °c, COP values drops to 73% and cooling effect obtained at a point is 2.8 kW and effectiveness of heat exchanger is about 50%. Graph 3: Generator Temperature Vs COP Conclusion From the above results we can say that it is possible to extract waste heat of the engine exhaust using heat exchanger. In order to increase the performance of VARS we have to operate heat exchanger at the optimum condition mentions in results. Some precaution we have to take care such as at the initial stages of engine operation performance of VARS is low, hence to get the same cooling effect we have heat ammonia generator using heating coil.

Henry David Thoreau - Conservationist, Visionary, and Humanist :: Biography Biographies Essays

Henry David Thoreau - Conservationist, Visionary, and Humanist He spent his life in voluntary poverty, enthralled by the study of nature. Two years, in the prime of his life, were spent living in a shack in the woods near a pond. Who would choose a life like this? Henry David Thoreau did, and he enjoyed it. Who was Henry David Thoreau, what did he do, and what did others think of his work? Henry David Thoreau was born in Concord, Massachusetts on July 12, 1817 ("Thoreau" 96), on his grandmother's farm. Thoreau, who was of French-Huguenot and Scottish-Quaker ancestry, was baptized as David Henry Thoreau, but at the age of twenty he legally changed his name to Henry David. Thoreau was raised with his older sister Helen, older brother John, and younger sister Sophia (Derleth 1) in genteel poverty (The 1995 Grolier Multimedia Encyclopedia 1). It quickly became evident that Thoreau was interested in literature and writing. At a young age he began to show interest writing, and he wrote his first essay, "The Seasons," at the tender age of ten, while attending Concord Academy (Derleth 4). In 1833, at the age of sixteen, Henry David was accepted to Harvard University, but his parents could not afford the cost of tuition so his sister, Helen, who had begun to teach, and his aunts offered to help. With the assistance of his family and the beneficiary funds of Harvard he went to Cambridge in August 1833 and entered Harvard on September first. "He [Thoreau] stood close to the top of his class, but he went his own way too much to reach the top" (5). In December 1835, Thoreau decided to leave Harvard and attempt to earn a living by teaching, but that only lasted about a month and a half (8). He returned to college in the fall of 1836 and graduated on August 16, 1837 (12). Thoreau's years at Harvard University gave him one great gift, an introduction to the world of books. Upon his return from college, Thoreau's family found him to be less likely to accept opinions as facts, more argumentative, and inordinately prone to shock people with his own independent and unconventional opinions. During this time he discovered his secret desire to be a poet (Derleth 14), but most of all he wanted to live with freedom to think and act as he wished. Immediately after graduation from Harvard, Henry David applied for a teaching position at the public school in Concord and was accepted. However, he refused to flog children as punishment. He opted instead to