Ancient Greek Vs. Medieval Theater - 1154 Words

Each theatrical work reflects the culture and moment in time it is made in. The work does this by exemplifying the values and beliefs of its culture and time. Ancient Greek theater reflects ancient Greek values and beliefs, such as the importance of the gods. Medieval theater portrays Medieval beliefs and values, like the values of community and religion. This can be said for post-modern works as well. Post-modern theater, although it seems fractured, reflects the culture, sub-culture, and time of its creation. Although post-modern theater does not share all unanimous ideals, like previous theatrical works, it is still a product of one culture. The post-modern culture seems fractured because it includes multiple different groups. This is shift from the narrower perspective, like the just Greek or just Medieval European point of view, is due to increased communication. In the post-modern era it is much easier to communicate with anyone around the world. With the increase of communication, especially since the ancient Greek and Medieval times, there has been in increase in sharing beliefs and values. With more people communicating more voices can be heard. This saturates the post-modern era with different ideals, almost to the point of seeming fractured. That is not the case though; the increasing number of different beliefs is a post-modern belief in itself. The large sum of differentiating beliefs perpetuates one unanimous post-modern belief. This is the belief and valueShow MoreRelatedFate Vs. Free Will2263 Words   |  10 PagesAncient Greek Mythology has one side on fate vs free will. They feel as though you have no ultimate choice and fate will always be your destiny. However, that does not mean everyone follows their destined path until death. In Homer’s The Iliad, fate and destiny as the final outcomes of a person’s life, however, at some points you wonder if a person’s destiny falls directly in the decisions made by someone. Hektor and Achilles both had choices, but ultimately believed they must follow their destinyRead MoreArt History7818 Words   |  32 Pagespapyrus plant • Brightly painted • Recessed into the wall • Dont serve any structural purpose • Simply there for aesthetics • Use to break-up the monotony of the wall #61607; Pg. 54 Ââ€" Pyramid Complex at Giza • Only one of the 7 wonders of the ancient world (oldest and largest wonder) • Pyramid of Khufu o Right-most pyramid o Largest o Oldest • Pyramid of Khafre o Center • Pyramid of Menkaure o Left o Smallest o Newest #61607; Who built the pyramids? • Probably not slaves • BuiltRead MoreLogical Reasoning189930 Words   |  760 Pages.............................................................................. 299 CHAPTER 10 Deductive Reasoning .......................................................................................... 312 x Implying with Certainty vs. with Probability ................................................................................ 312 Distinguishing Deduction from Induction ..................................................................................... 319 Review of MajorRead MoreOne Significant Change That Has Occurred in the World Between 1900 and 2005. Explain the Impact This Change Has Made on Our Lives and Why It Is an Important Change.163893 Words   |  656 PagesWineburg, Historical Thinking and Other Unnatural Acts: Charting the Future of Teaching the Past Sharon Hartman Strom, Political Woman: Florence Luscomb and the Legacy of Radical Reform Michael Adas, ed., Agricultural and Pastoral Societies in Ancient and Classical History Jack Metzgar, Striking Steel: Solidarity Remembered Janis Appier, Policing Women: The Sexual Politics of Law Enforcement and the LAPD Allen Hunter, ed., Rethinking the Cold War Eric Foner, ed., The New American History

The Development Of A Pdp - 917 Words

A PDP is a tool that clearly indicates identified challenges (learning or development needs) in order of priority. Each competency in the PDP assessment informs specific outcomes with the help of this tool (Francis et al., 2014). I can easily monitor my progress towards my progress towards my set goals using the high competencies of my personal and professional skills to improve my areas of opportunities. My PDP shown in table 1, highlights my competencies that needs to be achieved by July 2016. This is with most importance as improving these skill areas will reinforce the main objectives which is to achieve the target goal outlined. There are many variety of methods to access the outcomes of a PDP. Rughani (2001) describes a range of techniques both subjective (e.g. reflective and self-evaluation) and objective (e.g. analysis of PACT). These can give different perspective on performance and can help at broaden the range of methods we employ. Reflection According to Lew and Schmidt (2011) the role of reflection in education has created an upsurge of interest amongst educators and researchers since Dewey’s 1991 ground-breaking work, which emphasized the positive roles that reflection might play in fostering students’ self-reflection, critical thinking, and in the demonstrable development of professional values or skills. The definitions of self-reflection, though heterogeneous, are united in their advocacy to improve student learning. 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You will explore how reflective practice can improve your development and practice and contribute to the quality of service provision You will also look at the process of planning development, and the importance of feedback and reflect on how your values, belief systems may

If I Were a Man by Charlotte Perkins Gilman free essay sample

In Charlotte Perkins Gilman’s short story â€Å"If I Were a Man† she successfully shows the subconscious thinking of a young woman who wishes with her heart and soul she would become a man. The story is based on a young woman named Mollie Mathewson, who ends up becoming her husband due to her wishes to be a man. She then goes throughout the day as her husband, Gerald. â€Å"She was Gerald, walking down the path so erect and square-shouldered, in a hurry for his morning train, as usual, and, it must be confessed, in something of a temper† (Gilman 50). Gilman successfully brings this story to life by taking a third-person limited omniscient point of view, which allows us to see inside her innermost thoughts. Mollie Mathewson longs to be a man, because at this time men have all the power and pride women don’t. She is envious of all the things men can have. We will write a custom essay sample on If I Were a Man by Charlotte Perkins Gilman or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page â€Å"She felt what she had never felt before in all her life-the possession of money, of her own earned money-hers to give or to withhold, not to beg for, tease for, wheedle for-hers† (Gilman 51). For the first time in her life she gets to see what its like to have money that she does not have to share with anyone else. Men get to make the money while women stay home and take care of things around the house. Mollie now gets to experience life outside the house, and she also gets to feel what it’s like to not have to report to anyone. She is her own person now. During her day as Gerald she begins to take on his thoughts. She begins to think about women’s fashion and business sense. She particularly starts to dislike women’s hats. With the eyes of a man and the brain of a man; with the memory of a whole lifetime of free action wherein the hat, close-fitting on cropped hair, had been no handicap; now she perceived the hats of women† (Gilman 52). It’s interesting the way Mollie is taking on her husband’s thoughts. The reader would never think Mollie would think of women’s hats this way. The reader would think in spite of her being a man she would still think like a woman. On the train to work Mollie comes across a few men that Gerald rides the morning train with, and they begin having a biased discussion about women, that Mollie takes part in it. They talk about how women get whatever they want once they’ve got their mind made up and how men are smarter than women. Suddenly Mollie tells the men it’s time to wake up. She explains that women are pretty much the same as they are. Men and women are both people. Another thing Mollie said that is the most important quote of the story is, â€Å"As for Mother Eve-I wasn’t there and can’t deny the story, but I will say this. If she brought evil into the world, we men have had the lion’s share of keeping it going ever since-how about that? † (Gilman 55). Gilman shows men blame women for the way the world is, but it is both men and women who should equally be blamed for what goes on in the world. In the story the reader gets a feel for what Mollie is experiencing during her day as her husband Gerald. Charlotte Perkins Gilman does an amazing job getting her point across using the third-person limited omniscient point of view. At the end of the story Gerald is now conscious of new views and feelings about women that he never had before. Without Gilman’s use of the third-person limited omniscient point of view the reader wouldn’t have gotten that much out of the story.

Marketing Research Essay Example For Students

Marketing Research Essay 1. Product: Boxer shorts A. B. C. Yes D. Political, legal and regulatory, and sociological for conservative societies. It also makes it difficult to advertise. Color and size sensitivity. Some markets less conservative, easier to sell intimate apparel. Almost everyone wears underwear. Different styles are a different state of mind. 2. A. The first step is developing a hypothesis. B. Descriptive Research because its easy and requires minimal resources, and gets a general census. The company also has prior knowledge and the problem is clearly defined. According to Ellas interpretation, she feels that by looking at the advertisement about the Dodge Grand Caravan a person will get all the explanation he/she needs. Her second choice was Volvo which looks like a very nice car, but does not apply to the need of a customer. She would prefer to know the features that the car is offering. She feels that the name of the brand is hidden because its all the way on top and on the edge that it would not be visible to the eye of the customer. Her third choice was Ford Expedition, because looking at the magazine ad she feels that it explains the variation of the car. However, she thinks that the ad does not apply why it was advertised for and that there is not enough description to the car. Her fourth choice was Suzuki, because she claims that the ad itself takes a person attention. Therefore, she also liked that the typeface S and Suzuki overlaps on top of each other. Her Fifth choice was Toyota, because she thinks its a nice looking car, but the theme that was used for this ad is a little bit funny. She feels that way because the theme does not fit to the description of the car. Her suggestion for this ad is to create more ideas, (i.e. the name of the brand should be visible; the slogan should be different in the sense that it should apply to the description of the car). Svetlana Khanimova The second person that I have interviewed is Milana. She is a 22 years old nurse from Brooklyn, N.Y. Milana earns about $50,000 a year she likes to play volleyball and read novels in her spare time. Her first choice was the All new Dodge Grand Caravan, because of two reasons: First of all she said thats its a big family car and it is red color which caught her attention very fast. Second, this model contains a lot of details that can help her get as much information as she needs. Her second choice was Ford Expedition, because it gave her a good impression since she likes to travel a lot and therefore this appearance fulfills her needs. She feels that this car ad claims that it can handle traveling. In addition, it has different models and nice logo. She feels that this advertisement needs to put more information about this model. Her third choice was Suzuki, because the liked the comparison between the Suzuki and the cheetah, which transforms into high speed. In addition, she feels that the car is luxurious and big enough for the family. Also it gives enough information and has a good description of the car. Her forth choice is Volvo; she claims that it is a powerful car and can handle all the roads. She likes what it says on the side Volvo for life, but she also feels that there is not enough information about the features of the car. Her fifth choice is Toyota; she feels that it is not a very successful ad because it doesnt convince her to buy the car. She thinks that the car is too far, it needs to be closer How We Lie Essayand side wise, so that the customer can see the whole model. She also feels that the information that Toyota provides is very limited. Maya is the third person that I have interviewed. She is a 21 female that lives in Brooklyn, N.Y. She is a college student who lives with her parents. Her hobbies include, playing volleyball, basketball, and ice scatting. Mayas first choice was the Dodge Grand Caravan, because it caught her eyes to the information that she needs. For example, it provides the .

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Intolerance in Nigeria free essay sample

ABSTRACT This paper examines the relationship between religion and sustainable development, as well as the role of Nigerian intellectuals in ameliorating religious crisis in the country. Religion, as a system of faith is based on belief in the existence of a particular God or gods, to some extent, influences or contributes in developing and coordinating the expression of the capacities latent in human nature for the progress of the society. All the elements that made up the resources originating from human are expressed in their actions, behaviour and daily activities, either in positive and constructive ways, or in a negative and destructive ways, especially with respect to their inherent power to generate value by leveraging other production variables for economic growth and development. Empirical results obtained, using descriptive analysis approach, indicate that religion plays an important role in shaping the moral and social values necessary for development. Based on these findings, some recommendations are offered which include: Re-examine education policies in the light of its contribution to individual growth and to bring about fundamental structural changes in society, changes which are necessary for the creation of a just, peaceful, and harmonious environment, hence teachers and other intellectuals must be a model of nobility, selfactualization and discipline, since sound character is ultimately more important than intellectual brilliance. We will write a custom essay sample on Intolerance in Nigeria or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page . Keywords: Religion, Economic growth, Amelioration, Tolerance and Intellectuals. INTRODUCTION A religion can be broadly described as a set of common belief and practices generally held by a group of people. Oxford Learner Dictionary described religion as a system of faith that is based on belief in the existence of a particular God or gods. According to Oke, Oloruntimehin and Akinola (1996), it is generally accepted by social scientists that people’s religious beliefs and their social organizations are closely interrelated. They quoted Emile, as noted that religion is a social artifact symbolizing what a society considers sacred and the most sacred thing to any society is the society itself. In view of this, religion provides an organized picture of the universe and establishes a more or less orderly relationship between man and his surroundings. Early economists and other researchers have paid little attention to any link between religion and economic development, rather it is seen as something personal between man and his God. The early relationship between religion and economic was established by Marx, who was of the opinion that the strength of an economy would influenced a religion or belief. However, the like of Max Weber, an eminent sociologist of early 20th century was of contra opinion. According to him, the source of the growth of the western economy is religion, especially the reformation of protestant and its doctrine about 40 Religion and Economic Development: the Role of Nigerian Intellectuals Saheed, Zakaree S. and Alofun, G. O. O. simplicity and moral responsibility to work (Skousen, 2007). Weber Marx (1930), believe that capitalism originated from religious ideals and not historical materialism. Specifically, the protestant reformation teachings changed the western culture, and led to the rise of capitalism, which in turn led to the growth and development of their economy. Islam as a religion also played a positive role in the development of the Arab society and transformed it to such a remarkable extent that it not only overcame its own handicaps but also brought about a revolutionary change in the societies that came under its influence (Charpra, 1998). Barro and McCleary (2003) suggested that higher rates of religious beliefs stimulate growth because they help to sustain the aspect of individual behaviour that enhances productivity. The higher number of church or mosque attendance, for instance, tends to depressed growth because it signifies a greater use of esources including land, buildings and other capital, by the religious sector. However, that suppression of growth is tempered by the extent to which church or mosque attendance leads to greater religion beliefs, which in turn encourages economic growth. In Nigeria, traditional communities are essentially religious. In these communities, religion is kinship based because it governs the peopleâ⠂¬â„¢s lineage or family relationships; it governs the doctrine of collective responsibility and forms the basis of the family, which in turn is the basic unit of social control. Indeed, religion is so important in the society as a form of social control because of people’s adherence to religion, whether traditional, Christian or Islam (Ikporukpo, 2001), which are the recognized religions in Nigeria, though the last two are more pronounced. Christianity and Islam, especially have a great influence on the daily lives of Nigerians, and plays a significant role in the socio-political and economic development. According to Nwite and Wilson (2010), churches in Nigeria has contributed immensely to the economic development of the country through investment in different sectors of the economy like real estate, capital market, shopping complex and schools. The essence of economic and human development embodied health, for which life expectancy is taken as a reasonable gauge; knowledge, which is expressed as a combination of literacy rates and average years of schoolings; and per capital income (Lynn, 2001). Any effort put forward towards the development of these determining factors would amount to stirring the economy towards development. Given the foregoing, the paper proposes to critically examine/analyses: i. The contribution of religion to the education sector in Nigeria. ii. The role of religion in the development of health sector in Nigeria. iii. The role of religion towards creation of job opportunities in Nigeria. iv. The role of religion and Nigerian Intellectuals in socio-ethnic crisis in Nigeria. To this end, the paper is organized into five sections. Following this introduction is section II, which focuses on conceptual issues. Section III discusses the role of religion on economic development in Nigeria. Section IV analyses the role of religion on socio-ethnic crisis in Nigeria, while section V summarises the findings and offer policy recommendation. 41 Journal of Social Science and Public Policy Volume 3, December 2011 CONCEPTIONS OF DEVELOPMENT There are different conceptions of development. First, it could be viewed as the development of the mind in which case the humanity of man is no longer subjugated to nature, but has transcended the confines of nature to progressively understand the whole of the world in order to be able to develop from it an environment which is most suitable for him. Moreso, economic development means sustained and sustainable growth per capita income, accompanied by diversification of production, reduction in absolute poverty, and expanding economic opportunities for all citizens (Lynn, 2003). The definition implies an economic growth which can be maintained over a long period of time. Moreso it requires diversification of economic activities so that the nation can be producing variety of goods and services, with the economy gradually progressing from primary, to secondary and then to tertiary economy. This should be able to create an expanding opportunities for people to make a choice of work and earn income through which they can improve their lives and able to participate in the social life of the community. Most importantly, there should be reduction in the level of absolute poverty in the country. The conception of development also connote growth with changes, which usually demands significant structural transformation within a country, and that includes the reorganization and reorientation of the economic and social systems, radical arrangements in installations and administrative structures, as well as reorientations in popular attitudes, customs and belief (Ogunkola and Egwaikhide, 2001). In contemplating development, more than access to goods and services is at stake. As such, in measuring level of development, the Physical Quality of Life (PQL) is considered, and it is equal weighting of an infant mortality rate, life expectancy, and basic literacy. However the United Nations Development’s version of development measurement refers to as Human Development Index (HDI) incorporates an income measure. All these elements considered in measuring the level of development of a nation are subject of level of development of the health and educational sectors, where the eligious sectors in Nigeria has contributed, as can be seen in the Holy Scriptures. For instance: Both religions in Nigeria, that is, Christianity and Islam recognize that the created universe is subjected to man for the enrichment and fulfillment of his life (Quran 45:12-13, 14:32-34 and Genesis 1:26-28). More so, contrary to the view that religion only emphasis faith and not works, the Bible and Qur’an invite men to labour and action (Qur’an 13: 11, 2:275 and Exodus 20 :9, Proverbs 16:3, 2. Thessalonians 3:10). All the elements that made up the resources originating from human are expressed in their actions, behaviour and daily activities, either in positive and constructive ways, or in a negative and destructive ways (Zainun, 2006), especially with respect to their inherent power to generate value by leveraging other production variables for economic growth development. In carrying out development activities, religion provides some code of norms and obligations which subject man to regulations necessary for the progress of the society. 2 Religion and Economic Development: the Role of Nigerian Intellectuals Saheed, Zakaree S. and Alofun, G. O. O. The Role of Religion in Nigerian Economic Development Religion has contributed much to development of human race, and it will be totally absurd to ignore the contributions of religion, especially Christianity and Islam. Both religious communities have become the key determinants of history and destiny of the nation, and its vast population, as well as deciding the course of development and building of the nation. Religion is given a reasonable degree of recognition by governments of Nigeria and some other countries as a major factor determining the stability of a nation. The roles of religion in economic development are more pronounced in the educational and health sectors, as well as creation of job opportunities. The Role of Religion in Educational Sector in Nigeria Education is a continuous and creative process which aimed at developing the capacities latent in human nature, and coordinate their expression for the enrichment and progress of ociety, by equipping students with spiritual, moral and material knowledge. Education in terms of the knowledge, qualities, skills, attitudes and capacities that enable individuals to become conscious subjects of their growth and active responsible participants in a systemic process of building a new world order. In Nigeria, Christian missions pioneered the establishment of primary and secondary schools, and ever since then the two religions, that is, C hristianity and Islam, have played a significant role in the establishment of schools in Nigeria. As the primary schools and their products multiplied, secondary schools were established to satisfy the demand for higher education. The Catholic Missionary Society (CMS) established the C. M. S. Grammar School in Lagos in 1859, followed by the Methodist Boys’ High School in 1879 and St. Gregory’s College, established by the Catholic in 1881. It is on this foundation that secondary schools education has rested in Nigeria (Olurode, 1999). Many other religion based secondary schools later emerged. These include, Ahmadiyya Grammar School, Anwar-Ul-Islam Grammar School, St. Theresa College, Islamic High School, Ebira Muslim Community College among many. The religious sector in Nigeria is also involved in establishment of higher institutions, to enhance government effort towards educational development. Among the religion based private higher institutions in Nigeria are listed in table 1. 0 below: Table 1. 0 Some religion based private higher institutions in Nigeria S/N Institution 1. 2. 3. 4. 5. 6. 8. Bowen University, Iwo-Osun State Fountain University, Osogbo- Ondo state Founder/Sponsor The Baptist NASFAT Islam Bishop Ajayi Crowther University, Oyo – Anglican Churches Oyo state Al-Hikama University, Ilorin – Kwara State Islamic Foundation (AROIF) and Assembly of Muslim Youth (WAMY) Redeemer University, Lagos state The Redeemed Churches Wesley University of Technology, Ondo The Methodist churches State. Covenant University, Lagos state Living Faith Church World 43 Journal of Social Science and Public Policy Volume 3, December 2011 . 10. Joseph Ayo Babalola University, Osun state Christ Apostolic Church VERITAS University (Catholic University of The Catholic Churches Nigeria), Abuja. Source: Culled by the authors from lists of private universities in Nigeria The Contribution of Religion to the Health Sector in Nigeria The spread of western ideas including medicine and social welfare also owed much to the advent of religion in Nigeria. According to Olurode (1997), by the end of the nineteen century, the hospital; was as effective as the school. By 1914, various missions had established hospitals such as the C. M. S. Iyi Enu Hospital near Onitsha, the Wesley Guide Hospital in Ilesha, the Baptist Hospital in Ogbomosho and the Sacred Heart Hospital of the Society for African Missions in Abeokuta. Missionary involvement had, as its aim, the eradication of superstitious beliefs about such diseases as smallpox. In Yoruba land, for instance, the god of smallpox shoponna had a strong hold on the people which took western medicine, specifically vaccines to break. Even where orthodox medicine failed, some religion has been playing a significant role to proffer spiritual solution to cure illness. The Role of Religion and Nigerian Intellectuals on Socio-ethnic Crisis in Nigeria According to UNHCR (2008) as quoted by Saheed and Alofun (2010), since 1999, more than 10,000 Nigerians have been killed and more properties worth billions of naira have been destroyed in sectarian and communal attacks and reprisals between Muslims and Christians. The most serious of these clashes occurred in Kaduna state in February and May 2000, and November 2002; Jos, Plateau state in September 2001; Kano state and Yelwa, Plateau state between February and May, 2004; and in the northern and southeastern Nigeria in the wake of the controversy over depictions of the Prophet Muhammad in the Danish press in February 2006. Table 2. 0. Some of the Religious Crises in Nigeria in the last one decade Date Events Victims Sept. 2001 July, 2007 Sept. 2007 Dec. 2007 Dec. 2008 July, 2009 Violent clashes between Muslims and Christians in 3,000 people killed Jos, Plateau state. Violent clashes between Sunni and Shi’a Muslims over 5 people killed the murder of a Sunni cleric in Sokoto Rioting in the northern state of Kano 19 people killed Three churches burned in the northern state of 10 people killed Bauchi Violent clashes over disputed election result which 400 people killed degenerated into religion crisis in Jos, Plateau state Two days battle with radical Islamists in two northern 150 people killed cities of Yobe and Bauchi Source: Culled by the Authors from the records of UNHCR, GlobalSecurity. org and Mail and Guardian online, 2009 44 Religion and Economic Development: the Role of Nigerian Intellectuals Saheed, Zakaree S. and Alofun, G. O. O. All these events, as shown in table 2. 0 above, have a negative effect on Nigerian economy in terms of capital and loss of lives, especially manpower or human resources with high productivity potentials. In each of these events the role of Nigerian intellectuals calls for question. In the two widely acknowledged religions in Nigeria, that is, the Christianity and Islam, the leaders are intellectuals who are well educated, many of whom are holders of various degrees ranging from bachelor, to masters and even doctorate. They are very influential among their followers and the congregations. Their words are like policy within that congregation. They are leaders who are supposed to articulate an ideological vision congruent with deeply held value of the country. They are supposed to engage in alignment, with interpretive orientations such that the country’s interest, value and belief as well as these religions activities, goals and ideology becomes congruent and complementary. Universal education must be relevant to he true needs of a community and contribute to the unification of mankind, in such a way that it will enable the people to move in the direction of their own chosen field and help them appreciate those universal qualities that distinguish the human race (Saheed, 2008). However, a situation where misunderstanding between two people in a community degenerated into communal clashes that claimed several lives, or members of congregation dispersed from their places of worship and created anarchy in the street, then the impact of the message of such religion leader becomes questionable. Is it a sermon of peace or hatred? CONCLUSION AND POLICY ISSUES Religion, especially Christianity and Islam, to some extent, has contributed to economic development either indirectly, by influencing and coordinate the expression of the capacities latent in human nature for the progress of the society, and by shaping the moral and social values necessary for development, or directly by its contribution to the growth of the educational and health sectors in Nigeria. However, religious intolerance among the people which often lead to crisis claiming several lives and destruction of properties has a negative impact on Nigerian economy. Adherents of the religious communities, to some extent, have lost focus of their responsibility towards nation building, and are embraced vices such religious fanaticism or intolerance and its attendant problems such as unending intensive strives, fight of superiority, loss of human and material resources. To promote religious tolerance towards national development, the religious communities in Nigeria must wake up to their responsibilities in home so that the problem of moral decadence plaguing the nation will radically reduced. Since many Nigerian families are facing the pangs of unemployment, inability to pay their children and wards school fees among other hardships, the religious bodies should resume their pioneering work in the area of health, education, industry and vocational training to assist the nation, especially in the area of human development. Education should be examined in the light of its contribution to individual growth and to bring about fundamental structural changes in society, changes which are necessary for the creation of a just, peaceful, and harmonious environment, hence teachers and other intellectuals must be a model of nobility, self-actualisation and discipline, since sound character is ultimately more important than intellectual brilliance. A well educated community 45 Journal of Social Science and Public Policy Volume 3, December 2011 ember is a determined yet humble participant, who helps overcome conflict and division thereby contributing to a spirit of unity and collaboration. Therefore, Nigerian education, like a universal education, must be relevant to the needs of the Nigerian communities and contribute to the unification of the people of Nigeria, regardless of their religion and race. It must enable the people both to move in the direction of their choice and help them appreciate those universal q ualities that distinguish the entire human race. REFERENCE Barro, J. B. and McClear, R. M. 2003), Religion and Growth, Havard University Press, U. S. A Ikporukpo, C. O. (2001). Government, Society and Economy. Ibadan: Stirling-Horden Publishers (Nig. ) Ltd. Lynn, S. R. (2003). Development Economics: World. New Jersey: Upper Saddle River Theory and Practice for a Divided Nwite, S. C. and Wilson, A. (2010). Churches in Nigeria and Investment Strategies: Problems and Prospect. Book of Abstract. Second World Congress on Research and Development, University of Ibadan. Oke, F. A. , et al. (1996). Introduction to Social Institutions. Ibadan: Akinlabi Fayinmi Ventures. Saheed, Z. S. (2008). Ebira: What Our Problems Is. http://jakomodebiravonyainternational. blogspot. com The Ebiras and the World. Saheed, Z. S. and Alofun, G. O. O, (2010). Nigeria, Five Decades of Sovereignty: Rich But Poor. Proceedings of the Fifth International Conference on Development Studies, Vol. 5, No. 1. Skousen, M. , (2007). Modern Economics Theories. Indonesia: Prenada Media Group Publication. Sushmit, N. (2007). Religion Economic www. mpra. ub. uni-muechen. de/8181 Growth and Development. MPRA. Zainun, B. (2001). Indonesia Human Resources Development. Jakarta: PT. Gunung Agung Tbk. 46

Electronic Engineer Essays

Electronic Engineer Essays Electronic Engineer Essay Electronic Engineer Essay International Conference on Modelling and Simulation Path Loss Effect on Energy Consumption in a WSN ? Krishna Doddapaneni,? Enver Ever,? Orhan Gemikonakli,†  Ivano Malavolta,? Leonardo Mostarda,†  Henry Muccini Communications Department, School of Engineering Information Sciences, Middlesex University, UK Email:{k. doddapaneni, e. ever, o. gemikonakli, l. mostarda}@mdx. ac. uk †  Dipartimento Di Informatica De L’Aquila Via Vetoio L’Aquila 67100, Italy Email:{ivano. malavolta,henry. muccini}@univaq. it ? ComputerAbstract- Energy consumption of nodes is a crucial factor that constrains the networks life time for Wireless Sensor Networks (WSNs). WSNs are composed of small sensors equipped with lowpower devices, and have limited battery power supply. The main concern in existing architectural and optimisation studies is to prolong the network lifetime. The lifetime of the sensor nodes is affected by different components such as the microprocessor, the sensing module and the wireless transmitter/receiver. The existing works mainly consider these components to decide on best deployment, topology, protocols and so on.Recent studies have also considered the monitoring and evaluation of the path loss caused by environmental factors. Path loss is always considered in isolation from the higher layers such as application and network. It is necessary to combine path loss computations used in physical layer, with information from upper layers such as application layer for a more realistic evaluation. In this paper, a simulation-based study is presented that uses path-loss model and application layer information in order to predict the network lifetime. Physical environment is considered as well.We show that when path-loss is introduced, increasing the transmission power is needed to reduce the amount of packets lost. This presents a tradeoff between the residual energy and the successful transmission rate when more realistic settings are employed for simulation. It is a challenging task to optimise the transmission power of WSNs, in presence of path loss, because although increasing the transmission power reduces the residual energy, it also reduces the number of retransmissions required. Index Terms- attenuation; path loss; wireless sensor networks; energy consumed; life time Evaluation tools Analytical modelingSimulators Real Deployment Test Beds Fig. 1. Performance evaluation methods I. I NTRODUCTION Recent advances in wireless communications and electronics have enabled the development of wireless sensor networks (WSNs), which comprise many low cost, low power, and multifunctional sensor nodes to accomplish certain sensing tasks in an intelligent manner. A sensor network is a special type of network which generally consists of a data acquisition system and a data distribution system. The unique characteristics of WSNs in terms of data collection and energy constrains, separate them from other communication networks.In Figure 1 we show the most common techniques for performance evaluation that are analytical modelling, simulation and benchmarking. The existing studies consider benchmarking in form of test beds and measurements for real deployment. The energy constrains of WSNs, limits their processing capabilities and communication. Therefore, using one of these performance evaluation methods, and analysis of deployment and management of such complex systems is a challenging task [1]. Due to inherent complexity and diverse nature of WSNs (dynamic topology, wireless channel characteristics, mobility, 978-0-7695-4682-7/12 $26. 0  © 2012 IEEE DOI 10. 1109/UKSim. 2012. 87 569 density of the nodes etc. ), analytical methods may become inappropriate as they require certain simpli? cations to model and predict the performance of the system. The simpli? cations may lead to inaccurate results in case of unrealistic assumptions [2],[3]. Experimental studies such as [4],[5],[6],[7] are not always practical for evaluation of systems with different architectures and under various conditions, mainly because of the dif? culties in deployment of real systems. Potential dif? ulties associated may be deploying tens or hundreds of sensor nodes in the physical environment, program the nodes and monitor their behaviour, the high costs involved in obtaining the instrumentation and other aspects such as fault tolerance, and scalability. It is well known that when it comes to benchmarking, the results in many cases cannot be extrapolated to suit the changes in the system or environment. Hence, testing and performance evaluation of WSNs through analytical modelling, real deployment and test beds can become complex, inaccurate, time consuming and/or costly.Simulation is currently the most widely adopted method for analyzing WSNs. Simulation studies provide quicker evaluation, optimisation and modi? cations of the proposed algorithms and protocols at design, development and implementation stages. A number of simulation tools are available with different features, models, architectures and characteristics for performance evaluation in WSNs. Packet level simulators offer various optimisation methods for free space scenarios and avoid the effects of path loss 1 that may be caused by different obstacles. The existing studies considering path loss for WSNs on the other hand are quite conservative.The impacts of path losses are not considered, and analysed together with details in upper layers such as network and application. In this paper, a new approach is considered to combine 1 Path loss is the attenuation in power density of an electromagnetic wave as it propagates through space. the path loss related issues with packet level simulation. A case study is presented which uses path-loss as well as network and application layer data in order to predict the network lifetime. Well known path loss computation models are adopted to use with a new tool, which allows the users to deploy ensors in a two dimensional abstraction of the physical environment, and to introduce obstacles. The new tool in turn communicates with well-known Castalia package and OMNET simulation environment. The energy consumption of the nodes considering the impact of path loss for different transmission powers is presented, the tradeoff between traditional performance measures such as packet loss and residual energy is illustrated. The approach presented lends itself as a ? exible and ef? cient tool which provides a more realistic approach for analysing WSNs and evaluating the performance in terms of energy ef? iency. The ? exibility of abstraction provided for the physical environment, also makes it possible to use various path loss models (even experimental ones). The rest of the paper is organised as follows: Section II considers various types of simulators. In section III, our approach is presented. Section IV provides the details of home automation application which is chosen as a case study. Section V shows the numerical results obtained. The impact of path loss on energy consumption of the nodes in a WSN is shown as well as the behaviour of nodes for different transmission powers in presence of path losses.In section VI, conclusion and future studies are presented. II. R ELATED W ORK In this section, we consider existing simulators. They can be classi? ed based on their level of complexity in to three main categories: Instruction, algorithm and packet level. A. Instruction level simulators Instruction level simulators are often regarded as emulators. They model the CPU execution at the level of instructions. TOSSIM [8], Atemu [9], Avrora [10] are well known emulators. TOSSIM is the most commonly used emulator. However, compared to other emulators, it is not the most precise one. TOSSIM, is a platform speci? simulator (a TinyOS mote simulator) which can compile any code written for TinyOS to an executable ? le. TinyViz, is the basic GUI for TOSSIM which can visualize and interact with the running simulations. TOSSIM is speci? c for TinyOS applications on Mica motes sensors and do not include power models. Avora, is a javabased emulator used for programs speci? cally written for AVR microcontrollers produced by Amtel and the Mica2 sensor modes. Atemu provides low-level emulation of the operation of individual sensor nodes. A unique feature of Atemu is its ability to simulate a heterogeneous sensor network.It is scalable and its high ? delity platform is used as a predeployment tool for sensor networks. B. Algorithm level simulators Shawn [11], AlgoSensim [12], and Sinalgo [13], are well known algorithm level simulators with emphasis on the logic, data structure and presentation of the algorithms. They rely on some form of graphical data structure to demonstrate the communication between the nodes. Shawn is a very powerful tool in simulating large scale networks with an abstract point of view. It supports distributed protocols and generic high level algorithms. AlgoSensim focuses on network speci? analysis of algorithms like localization, distributed routing, and ? ooding. AlgoSensim mainly facilitates the implementation and quality analysis of new algorithms. Sinalgo focuses on the veri? cation of network algorithms and abstracts from the underlying layers. It also offers a message passing view of the network. Sinalgo can be employed for quick prototyping and veri? cation in freely customizable network settings. C. Packet level simulators OPNET, Qualnet, NS-2, GloMoSim, are some of the most commonly used packet level simulators. They implement the data link and physical layers in the OSI network layers.Hence, radio models, 802. 11b or newer MAC protocols, fading, collisions, noise and wave diffractions are commonly implemented. Network Simulator (NS) is a discrete event simulator written in combination of C++ and OTcl. OTcl is an object oriented scripting language, developed mainly for networking research. It provides extensive support for simulation of TCP, multicast protocols, and routing for wired and wireless networks. With protocol implementations being widely produced and developed, the extensibility of NS-2 has been a major contributor to its success.It has an object-oriented design which allows for easy creation of new protocols. The key features for WSNs include battery models, hybrid simulation support, sensor channels, scenario generation tools and a visualization tool [14]. Scalability, lack of application model and the lack of customization are few limitations of NS-2 along with lacking an application model [3]. OPNET [15] and Qualnet [16] are commercialized network simulator software with powerful standard modules and they provide good simulation environment.OPNET is an excellent choice to simulate Zigbee based networks with the implementation of Zigbee protocol and IEEE 802. 15. 4 MAC protocol. Qualnet performs well in simulating large scale sensor networks due to its scalability in wireless simulation, but OPNET simulation requires a long time when the number of sensors considered is large. The above mentioned simulators use rather simple radio/channel models [17]. Also, the simulators are still platform speci? c and moderately scalable, making them unsuitable for protocol /algorithm design and testing.Furthermore the environmental details and especially the effects of path loss has not been considered in any of the given simulation packages. III. O UR APPROACH Figure 2 outlines the main components of our approach. This has been implemented in a tool called PlaceLife. An environment editor allows the user to specify the physical environment by using a graphical editor. The environment can include different obstacles and different sensors. An obstacle can have different properties such as the material it is 570 PlaceLife other layers info Environment Editor Application Model Path loss Model Translation engine ommonly used path loss models that de? nes the behaviour of signal strength in an indoor area. The path loss behaviour is dependent on the distance between nodes and the attenuation factor added by the objects. The attenuation can vary based on several factors such as the construction materials (e. g. , wood, glass and concrete) and the object size. In the Table I we show some attenuation values in dB introduced by various materials. We provide a detailed discussion in the next Section. The dependant path loss model can be expressed as [21]: LP = L0 + 20log(d) + mtype wtype Castalia Omnet++ Fig. 2. PlaceLife here, LP represents the path loss between two nodes, d is the distance between the two nodes, L0 is the path loss in free space environment, mtype refers to the number of objects of the same type and wtype is the loss in decibels attributed to that particular object. B. The translation engine The translation engine takes as an input the environment, application, and path loss models in order to produce simulation scripts. We use Castalia [22] as a simulation tool. Castalia is a WSN simulator used for initial testing of protocols and/or algorithms with a realistic node behaviour, wireless channel and radio models.Since Castalia is highly tunable and can simulate a wide range of platforms, it is used to evaluate different platform characteristics. Castalia features an accurate radio model based on the work of the authors in [23]. It also features physical process model, considering clock drift, sensor energy consumption, CPU energy consumption, sensor bias etc. Unpredictability of the wireless channel, energy spent in transmission/receiving packets, performance degradation experienced by duty cycles, collisions are usually overlooked by simple simulators.However these details are well established in Castalia [17]. All main components that affect the energy consumption of sensor nodes are considered that are the micro-processor, the sensor module, wireless transmitter/receiver and the path loss. We emphasise that while Castalia provides a good low level simulation platform; it does not provide any means to specify the application behaviour, the environment and the path loss models. The application behaviour is needed to derive application level simulation parameters. The environment and the path loss models allow the calculation of the path loss.In fact while Castalia assumes that the user provides path loss related parameters, our approach automatically derives those values from high level models such as the environment and path loss. IV. H OME AUTOMATION Monitoring and automatic control of building environment is a case study considered quite often [24], [25], [26], [27]. Home automation can include the following functionalities: (i) heating, ventilation, and air conditioning (HVAC) systems; (ii) emergency control systems (? re alarms); (iii) centralized control lighting; and (iv) other systems, to provide comfort, energy ef? ciency and security.In order to validate our approach made of and its size. The environment editor also allows the speci? cation of the sensor position in the physical environment. Obstacles and sensor position are used to compute the path loss. An application model de? nes the behaviour of nodes. From this model various performance parameters such as transmission and sensing rates can be derived. PlaceLife considers information from other layers such as network, data and physical layers to have a more realistic approximation for the life time. At network layer different protocols such as AODV [18] and DSR [19] can be speci? d but also static routing can be de? ned. This can be easily speci? ed on the environment model. Although various data link layer access methods can be used, the Timeout MAC (T-MAC) has been chosen in this case study. T-MAC is a contention based MAC protocol that use synchronised sleep schedules between the nodes in a WSN to conserve energy [20]. Also T-MAC provides both collision avoidance and reliable transmission. A. Path loss Path loss is the attenuation in power density of an electromagnetic wave as it propagates. Path loss is consequence of many effects such as free-space loss, refraction, diffraction, re? ction, aperture-medium coupling loss, and absorption. Path loss is also affected by other factors such as propagation medium (dry or moist air), the distance between the transmitter and the receiver, and the frequency of the signal. When the effects of path loss are not considered, the evaluation of underlying structure can become optimistic, since the problems associated, retransmissions and the way this phenomena affects the energy consumption are not taken into account. In our approach a path loss model can be speci? ed by the user. This model is used together with the physical environmental model in order to de? e the path loss between two nodes. In this paper we consider indoor environment and the dependant path loss model [21]. This is one of the most 571 A5 T Sm Sp Sp A3 BS A1 T T A4 Sp Sm Sm T Sp = sprinkler T = temperature Sm = smoke BS = base station concrete wood glass Sm Sp T A2 Sp Fig. 4. Fig. 3. Home automation Energy consumed by each node with and without path loss we consider the ? re alarm system and the automatic heating application. The ? re alarm system is composed of different temperature sensors and smoke detectors that are distributed inside the building.There are also sprinkler actuators used to enable the water ? ow in case of ? re. All the temperature sensors monitor the temperature at regular intervals (every 30 seconds). When a temperature sensor reads a value that exceeds a speci? ed threshold; it sends an alert message to the smoke detector. The smoke detector receives the alert and checks for smoke. An alarm is raised when the smoke is detected. In this case the smoke sensor also activates all the sprinklers. The automatic heating application is composed of different temperature sensors, a base station and various heaters.The temperature sensors send readings every 30 seconds to the base station. This is placed at the center forming a star topology. The base station averages the readings and decides whether or not the central heating system should be on. More speci? cally the base station works in the following way: if the heating is turned on and the average temperature is greater than the minimum threshold, the central heating system turns off. if the average temperature is less than the minimum threshold, the central heating system turns on. We consider the scenario of Figure 3. A ? at composed of ? e rooms (A1-A5). We also consider different obstacles such as wooden doors, walls and glass partition. V. N UMERICAL RESULTS AND DISCUSSIONS In order to show the usefulness and effectiveness of our approach and to analyse various factors affecting the performance in terms of energy consumption of WSNs, the numerical results are presented in this section. The simulation parameters are as follows: CC2420 radio de? ned by the Texas instruments is used, the output power of the different transmission levels in dBm are varied from 0 to -25dBm. Energy consumption for each transmission level varies.For instance for 0 dBm power consumed for listening (receiving) is 62 mW and for transmission is 57. 42 mW. Packet rate is kept at 250 kbps, the radio bandwidth is 20 MHz and the simulation runs for 9000 sec. T-MAC is used as a MAC protocol, and this makes the length of each frame period for all nodes 610 milliseconds, and the duration of listen time out 61 milliseconds. For our case study, we calculated the path-loss due to the material and explicitly set our path loss map [21], [28]. Refer to Figure 3 and Table I [21] for each type of obstacle and for its contribution to path loss.For the sake of the presentation we use numbers to represent sensors. Node 0 represents the base station. Nodes 1,4,5,7, and 9 monitor temperature in areas A1,A5,A4,A3, and A2 respectively. Nodes 2,3,6, and 8 monitor smoke in the areas A1,A5,A4, and A3 respectively. Table II and Table III show the energy consumed by the nodes for the application scenario considering the path-loss phenomenon and ignoring the path loss respectively. Similarly, Figure 4 shows the difference in energy consumed by each node for two different cases. In case one path loss is ignored, and for the next set of results the path loss is present.It is evident that the lifetime of the nodes is heavily TABLE I PARTITION DEPENDENT LOSSES FOR 2. 4 G HZ obstacles Concrete wall Wooden door Glass wall Cinder wall window Brick Masonry brick metal door attenuation in dB 12 2. 8 2 4 2 5 17 12. 4 TABLE II E NERGY CONSUMED BY THE NODES IN JOULES , CONSIDERING PATH LOSS nodes 0 1 2 3 4 5 6 7 8 9 energy 100. 7 84. 9 95. 6 94. 3 90. 1 88. 8 89. 3 88. 9 90. 5 91. 2 TABLE III E NERGY CONSUMED BY THE NODES IN JOULES , IGNORING PATH LOSS nodes 0 energy 81. 4 1 2 81. 4 82. 6 3 4 5 6 7 8 9 81. 4 81. 5 81. 5 82. 7 81. 4 82. 4 83. 1 572 Fig. 5. Energy consumed vs. ransmitted power for nodes 5-9 Fig. 6. Energy consumed vs. transmitted power vs. packets lost dependent on the impact of the path loss, and ignoring the effect of path loss would be an optimistic assumption when energy consumed by each node is considered. This is because, when the effects of path loss are not considered, problems associated, retransmissions and the way this phenomena affects the energy consumption are not taken into account. However these factors affect the life time of the node. Node 3 consumes 13 joules of more energy due to path loss, when compared to no path loss.Figure 5 shows the life time of the nodes 5 to 9, considering the impact of path loss for different transmission powers. Transmission power is varied from -25 dBm to 0 dBm, the energy consumption of the nodes is increased as we increase the transmission power. For node 7, as the transmission power is increased from -25 dBm to 0dBm, the energy consumed by the node also increases from 80. 1 joules to 88. 9 joules. The trade-off between traditional performance measures such as packet loss and residual energy is presented in Figure 6.The dotted lines represent the packets lost and the straight lines represent the energy consumed by each node. As the transmission power is decreased from 0 dBm to -25 dBm, there is a gradual increase in amount of packets lost. For node 0, as the transmission power is decreased from 0 dBm to -25 dBm, the number of packets lost increases to 370, from 206 and the energy consumed increases to 100 joules, from 88 joules. Because of the retransmissions, more energy is consumed by the nodes. But the increase in transmission power does not necessarily mean increase in the life time as there are no retransmissions.When the tradeoff between the packet loss and the energy consumed is analysed, it can be seen that the optimum transmission power should be between -15 to -5 dBm where the energy consumption is less than 95 joules and packet loss is less than 200 packets. VI. C ONCLUSION AND FUTURE WORK In this paper, a simulation-based study is presented that uses path-loss network and application layer data in order to predict the network lifetime. Physical environment is considered as well. 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