Industrial Effluents in the Water Pollution Essay

Water pollution is caused by emission of domestic or urban sewage, agricultural waste, pollutants and industrial effluents into water bodies. Nowadays, its main source is the waste material discharged by industrial units. Waste materials like acids, alkalies, toxic metals, oil, grease, dyes, pesticides and even radioactive materials are poured into the water bodies by many industrial units. Some other important pollutants include polychlorinated biphenyl (PCB) compounds, lubricants and hot water discharged by power plants. The pollutants unloaded into the water bodies usually dissolve or remain suspended in water. Sometimes, they also accumulate on the bottom of the water bodies. Another important pollutant, that can endanger marine life, is the oil spilled by oil tanks. As per the estimates of the United Nations, 1. 3 million barrels of oils are spilled annually into the Persian Gulf, and about 285 million gallons are spilled into the oceans every year. In the United States, the industries contribute to more than half of the total water pollution. The industrial effluents contain pollutants like asbestos, phosphates, mercury, lead, nitrates, sulfur, sulfuric acid, oil and many other poisonous materials. In many countries, industrial water is not treated adequately before discharging it into rivers or lakes. This is particularly true in the case of small-scale industries that do not have sufficient capital to invest in pollution control equipment. In many instances, the researches and studies carried out to determine the toxicity of these pollutants are focused on the individual effect of the toxic elements. Therefore, sometimes these researches lead to an underestimation of the total toxicity of these harmful materials. Besides, their toxicity is assessed with the help of tests carried out on bacteria, which also fails to take into account the accurate toxic effects on other organisms. These harmful pollutants are a major contributor to many grave diseases such as diarrhea, cholera, hepatitis, dysentery and salmonellosis. Besides, many of the pollutants are also carcinogenic i. e. they can cause cancer. Some pollutants like sodium can cause cardiovascular diseases, while mercury and lead cause nervous disorders. DDT is another toxic material which can cause chromosomal changes. Excess fluoride in water may damage the spinal cord, while arsenic can cause significant damage to the liver and the nervous system. In addition to all these, organic compounds present in the polluted water facilitate the growth of algae and other weeds, which in turn use more oxygen dissolved in the water. This reduces the amount of oxygen dissolved in the water and the consequent shortage of oxygen for other aquatic life. In recent times, to control the menace of water pollution, various legislations have been introduced by different countries. The legislations undertaken by the United States include Federal Water Pollution Control Act (1972), the Marine Protection, Research, and Sanctuaries Act (1972) and the Safe Drinking Water Act (1974). Besides, Federal Insecticide, Fungicide, and Rodenticide Act was also amended in 1988. For the success of these legislations, cooperation of the citizens and industrial units is an important prerequisite. In addition to the enforcement and proper use of these rules and regulations, availability of efficient and cheaper pollution control techniques is also required to tackle the threat posed by water pollution.

Curriculum Assessment Essay

Assessment is an important part of our curriculum framework as it both enhances learning and provides opportunities for students to reflect on what they know, understand, and can do. It also provides the guidance, the tools and the incentive for the teachers and the students, as well as the curriculum makers, for them to become more competent, more skillful and better at understanding on how everybody will learn. INTENDED VS IMPLEMENTED VS ACHIEVED CURRICULUM INTENDED Curriculum IMPLEMENTED Curriculum ACHIEVED Curriculum Written Taught Learned/Attained Refers to the objectives set at the beginning of any curricular plan. Refers to the various learning activities or experiences of the students in order to achieve the intended curricular outcomes. Refers to the curriculum outcomes based on the first two types of curriculum: the intended & implemented curriculum. Establishes the goal, specific purposes and immediate objectives to be accomplished. Refers to the actual activities being practiced in schools It is considered the product/learning outcomes of the curriculum development process. It answers what the curriculum writer wants to do. The activities may coincide with the specified objectives of the curriculum (intended curriculum) or may largely be out of agenda. It indicates performance in relation to the objectives and the activities usually described thru test scores and other performance indicators measured by evaluation tools. SOME QUESTIONS TO ASSESS THE INTENDED CURRICULUM 1. Are the objectives achievable within learners’ development levels? 2. Is it achievable within allotted time? 3. Are there enough resources to achieve the objectives? 4. Are the objectives clear and specific? 5. What are the ways to measure the outcomes of the objectives? 6. Are the objectives observable, relevant and doable? SOME QUESTIONS TO ASSESS THE IMPLEMENTED CURRICULUM 1. Are the learning objectives congruent with the stated objectives of the curriculum? 2. Does the teacher have the skill to implement the activities or use the strategy? 3. Does the teacher utilize the various ways of doing to complement the learning styles of students? 4. Are the materials and methods appropriate for the objectives set? 5. Are there alternative activities for learners to do to accomplish the same objectives? 6. Are there activities to address individual differences? 7. Do the activities provide maximum learning experiences? 8. Do the activities motivate the learners to do more and harness their potentials? 9. Do the activities utilize multiple sensory abilities of the learners? 10. Do the activities address multiple intelligences of the learners? SOME QUESTIONS TO ASSESS THE ACHIEVED CURRICULUM 1. Do the learning outcomes achieved by the learners approximate the level of performance set at the beginning of the curriculum? 2. Are the learning outcomes achieved higher or lower than the objectives set? 3. Do the achieved learning outcomes reflect the knowledge, skills and attitudes? 4. How many percent of the learners in the same class perform higher than the level set at the beginning? 5. Do the curricular outcomes reflect the goals and aspirations of the community where the curriculum was implemented? COMPARING THE INTENDED, IMPLEMENTED AND ACHIEVED CURRICULUM 1. Use of Curriculum Mapping A curriculum map is created by the teacher of the subject by recording what he/she is actually doing in the classroom at various points throughout the day. Then, the map is compared to what is actually written in the school district’s curriculum guide. 2. Use of Backward Mapping Analyzing items on a culminating test (an achievement test or final exam) to determine the actual achieved curriculum. These test items are then compared to the written curriculum and the mapped taught curriculum to find gaps and overlaps. EXAMPLE OF ASSESSING THE INTENDED, IMPLEMENTED AND ACHIEVED CURRICULUM 2012 BASIC EDUCATION CURRICULUM (BEC) INTENDED CURRICULUM IMPLEMENTED CURRICULUM ACHIEVED CURRICULUM (What are the goals of BEC?) (How was BEC implemented to accomplish the goals?) What has BEC achieved?) To raise the quality of the Filipino learners and graduates who will become lifelong learners. Learning areas were reconstructed into 5 learning areas: English, Science, Mathematics, Filipino and MAKABAYAN. Increased level of performance in tool subjects. To decongest the curriculum in order that the teachers and the learners will be able to contextualize it. Grades 1 & 2 Science & Health is integrated in English. Formal Science subject starts at 3rd Grade. Change in teachers paradigm from being dispenser of knowledge to facilitator of learning. To use innovate, interdisciplinary and integrative modes of instructional delivery whenever possible and appropriate. MAKABAYAN comprise Character Ed. &Sibika at Kultura for Grades 1-3; plus EPP (TLE), MSEP (MAPEH), and Hekasi (AP) from grade 4 – HS Increased instructional materials support for teaching & learning and decentralized management of school resources. To increase time for tasks in order to gain mastery of competencies of the basic tool subject. Learning activities are made interactive, integrative, learner – performance based. Increased number of in – service trainings for teachers and more involvement of stakeholders. In the BEC or in any curriculum for that matter, there is an evident matchbetween the intended, implemented and achieved curricula. CONCLUSION Each type of curriculum should be linked to one another. Any gap will make the curriculum weak and will lead to obstacles in the accomplishment of the overall purpose of the curriculum. PROFILE The first reporter is Miss Jannah Madonna Panganiban La Rosa. She was born on November 21, 1988 and is presently residing at Brgy. PambisanMalaki, Pinamalayan, Oriental Mindoro. She finished her collegiate education at Mindoro State College of Agriculture & Technology (Main Campus), Victoria, Oriental Mindoro, with a degree in Bachelor of Secondary Education, Major in General Science. At present, she is a Secondary School Teacher of Nabuslot National High School. The second reporter is Mr. Ian Luke LacatanLolong. He was born on December 15, 1989 and is presently residing at Bangbang, Pinamalayan, Oriental Mindoro. He finished his collegiate education at Kalos Mission Arts College (formerly Baguio Theological School), Baguio City with a degree in Bachelor of Arts in Theology. At present, his pastoral ministry is at Pambisan Bible Christian Church, Pinamalayan. The third reporter is Mrs. JhoanSapunganIngco. She is presently residing at Sabang, Pinamalayan, Oriental Mindoro. She finished her collegiate education at ABADA College, Pinamalayan with a degree in Bachelor of Secondary Education, major in English. At present, she is a Secondary School Teacher in Nabuslot National High School, Sabang Extension.

Black Dog by Penelope Lively Essay

Brenda Case is a mid-age housewife with personal problems. The English modern short story â€Å"Black Dog†, written by Penelope Lively, portrays Mrs. Case as being a frustrated woman with a peculiar manner, besides this she has difficulties to adapt within the society’s norms. This is probably because Brenda Case is going through the largest crisis in her life; the mid-life crisis. This gives Brenda some difficult factors to deal with. She is going through this emotional state of doubt and anxiety, realizing that her life is halfway over. Through the whole story Brenda is searching or her own sincere character, but has trouble finding it. As a defence mechanism, she supersedes all of her feelings. Was this the life she really would have wanted? The Black Dog symbolizes her â€Å"shadow life†. We’re situated in a suburb of England; the Case family is a regular middleclass family. Mrs. Case, who is the principle character, is a housewife and her husband, John, makes the money. Their life is characterized by the static tedious daily routine; her doing the shopping and him attending the Job. One day Brenda starts seeing a large Black Dog lying in their front yard. She constantly has a fear that the dog is going to eat her, basically paranoia of the wild animal. However, Mr. Case cannot see the dog. He even asks all the neighbours, but they haven’t seen the dog either. The colour of the dog should illustrate bad omen and negativity, but was this really signifying bad omen or was all this commotion simply caused by Brenda’s alter ego or her introverted state? As mentioned the dog symbolizes Brenda’s shadow life; the psychological term of the life that she could have had or if you live in the shadow of someone else. Mrs. Case obviously did not have a dream of becoming a housewife but she first realized her own character now. Perhaps she was pressurized from outside influences on what to do. This is also shown when Brenda follows the guidance from her two well turned- out daughters; they advice her to go on vacation and redecorate the house. However, when this made no progress they send her to the doctor’s office. All these recommendations are not helping Mrs. Case crisis, she finds out that facing the problem was the right solution for her. She understands that the Black Dog will be there all the time until she faces the real problem, her mid-life crisis. I would assume answering the question of â€Å"What is valuable in life? † and â€Å"What is the meaning of life? † would be a difficult task. The vagueness of the query is inherent in the word â€Å"meaning† and â€Å"value†, which opens the question to many interpretations. Some would use theological or spiritual explanations, where others would use scientific theories or philosophical arguments. The power of the words means different things to different people. Clearly Mrs. Brenda Case has gone through a her ageing children; all of a sudden she did not have to take care of her kids any longer. We can conclude that most outside influences have noting to do with your real self. You need to find your own sincere meaning of what life is and what goals you may have got. Some say a mid-life crisis also is the beginning of individuation and a process of self-actualization that continues on to death. But what is a mid-life crisis? Is it the physical changes associated with ageing or the changing of spousal relationship? Is it the death of parents or the children becoming adults? Perhaps it is the menopause for women and work issues for men? I guess a crisis through mid-life would involve reflections on what the individual has done up to that point often associated with feelings that not enough was accomplished. Maybe Brenda had the convincing that she one day would be successful accountant manager, instead she became a housewife wearing a pinafore. At the end of the story John Case suddenly see some footsteps of the dog, but what is causing his hallucination? A large question remains unanswered.

The term science Essay Example | Topics and Well Written Essays - 1500 words

The term science - Essay Example (Murzi M., 2006) Everyone knows that science rests on the broad shoulders of facts, without facts there would be no science. But the accumulation of facts only does not make science, just like piling up of bricks does not make a house. To make a house one first needs to have chalk-out a plan of the house and then lay the bricks in a definite pattern according to the plan. It's the same thing with the facts and science, only facts does not make science. The accumulation of facts, the systematic analyzation of these facts, experimentation on these facts, forming a hypothesis and then arriving to a fixed conclusion through these facts is what actually science is. The green leaves is a simple fact, but the knowledge that green leaves produce food for the plant and releases oxygen into the atmosphere is science. This conclusion was derived after scientifically analyzing the fact that the leaves are green and by experimenting on this fact. This is how facts work together and creates science. (Carter Stein J, 2006) The world is fu The world is full of facts, we eat, that is a fact, we sleep, that is a fact, we laugh, and that is a fact; so if we look at the world this way through facts that then everything in this world and every moment of our lives adds up to science. Right from our waking up in the morning to going to sleep at night totals up and makes way for science. Even our dreams and thoughts is a part of science as they are also facts and with logical and systematic approach people have made science out of them. No branch of knowledge is devoid of science, anything that requires reason, logic, thinking and systematic approach is science, so even the branch of knowledge like history, though a humanitarian subject can be said to be a form of science. As history is also the collection of facts though one may have to dig it up, and laying them in a systematic manner like laying the bricks for building a house. Science and Knowledge The term science comes from the Latin word 'scienta' which means knowledge, but knowledge as one knows is the fact or the whole truth that can be shared with no questions asked, whereas if a chemist or a physicist is doing some research in a lab on their own individual fields one may call it science, but not knowledge. The simple reason why it cannot be called knowledge is that no one knows about the science that is being done in the lab. So now the question arises that when does science which itself means knowledge actually becomes knowledge The answer for this is that the science in the lab becomes knowledge only when the researcher gets to the truth of the matter on which he was carrying out the science in the lab. Then he can go out and cry Eureka! And hence make a contribution to knowledge. Through this observation one may also conclude that science is not knowledge but nothing but the truth and knowing it is the real knowledge. So Why Science A simple and a prompt answer to this question would be to satisfy the undying curiosity of human beings. Human beings are never satisfied with what they have and what they

Small-Business Idea Paper Assignment Example | Topics and Well Written Essays - 1250 words

Small-Business Idea Paper - Assignment Example Advantages and Disadvantages of Four Different Forms of Business Organizations There are fundamentally four types of business forms currently practiced by entrepreneurs, such as sole proprietorship, partnership, C-Corporation, and S-Corporation. However, with due consideration to their practical implementation, various advantages and disadvantages can be identified which are elaborated in the further discussion. Sole Proprietorship Majority of the businesses observed in the locality are of this kind. The most significant advantages served by this form of business are the minimum obligation of legal implications. To be elaborated, The profits accrued from the business is entirely receivable to the proprietor Unhindered employment of capital in the business The proprietor possesses exclusive control on the business Tax rebates and exclusion from capital gains are served to the proprietor Apart from these advantages, a sole proprietorship concern also require facing disadvantages as fol lows, In this case, the proprietor is liable for any loss or repayment of debt incurred from the business Transfer of proprietorship is subjected to a wide number of legal obligations (Pride, Hughes, & Kapoor, 2011) Partnership Partnership concerns are quite different from the forms of sole proprietorship. It is in this context that this form possesses significant advantages as well as disadvantages in its ultimate implications. These are as follows, Advantages: Partnership firms have no formal requirements for its creation or running the business The partners engaged in the firm are only liable to pay individual taxes and also enjoys distributed liability of any debt and/or loss incurred by the concern Disadvantages: Termination of partnership is subjected to various legal requirement As the concern is not termed as a legal entity, debts and losses incurred by the firms are to be repaid by the partners (Gitman & McDaniel, 2008) C-Corporation Similar to the aforementioned two busine ss forms, this form also possesses significant advantages along with few disadvantages which are as follows, Advantages: Limited liability of the owners as subjected to their investments to the business Gathering a significant amount of capital is uncomplicated in this form Number of owners or shareholders can be unlimited Disadvantages: Operational structure is quite complex Significant influence of legal barriers can be witnessed Rights and power of control in the firm is determined according to the investment considered by the shareholders (Barringer & Ireland, 2009) S-Corporation It has been widely termed that S-Corporations possess missed advantages and disadvantages of partnership firms and other forms of regular businesses. However, the most apparent advantages and disadvantages of S-Corporation are as follows, Advantages: The owners are required to disburse either corporate tax or individual tax only Constructive rules for employment tax with

Swanson's Theory of Caring Essay Example | Topics and Well Written Essays - 1500 words

Swanson's Theory of Caring - Essay Example Clinical observations include temperature, blood pressure and pulses are normal. The model used in this context involves evaluating the caregiver’s attitude. They include being competent, meeting individual needs of the women and respecting their dignity. If proper care is given after a woman miscarries then she has the power to improve on her own. The scenario involves women who had early miscarries and those who had a late miscarriage. Nurses and midwives who care for these women are also considered in this situation. Swanson’s caring categories apply in this scenario that includes â€Å"Maintaining belief†, â€Å"knowing†, â€Å"being with†, â€Å"doing for† and â€Å"enabling† (Brier, 2008). The middle range caring theory The theory is built on the basic Swanson’s fundamental principles. These elements are the usual five that the doctor developed in her theory. The first developed by the doctor in 1991 element is referred to as â€Å"knowing† (Jansson & Adolfsson, 2011). It strives to understand an event in the way it has a meaning in another person’s life. It does not assume that one can know what the other feels or they way he or she is affected by the situation. Instead, it tries to understand and endeavor to take care of the person. The lives of the patients are important and the nurse is obliged to fully understand it. When a nurse embraces ‘knowing’, he or she develops empathy that is important for the care receiver. It encompasses observations, systematic research and prolonged clinical experience. The second process is ‘being with’ and it implies being available or with the woman. It implies stepping into her shoes, providing psychological, emotional and physical support (Krippendorff, 2004). It also involves effective communication and good listening skills. The midwife must display assertiveness, advocacy and competence to protect her interests. ‘ Doing for’ process requires maintenance of both knowledge and skills (Adolfsson et al., 2004). It entails doing what the other person would do to themselves and is a practical side and art of the midwife profession. It can be described as comforting, being protective, anticipatory. Nurses should practice it with competency and use all the available skills. The other process is ‘enabling’. This model describes it as facilitation of an individual’s passage through transitions from unfamiliar events (Jansson & Adolfsson, 2011). It is also referred to as empowerment. To empower the women, nurses must give them choices and be fully informed of them. This enables them to control their decisions regarding pregnancy resulting to equal partnership when giving care. For the midwives to give informed choices, they must be aware of all evidence-based guidelines that are relevant to them (Brier, 2008). Finally yet importantly, ‘maintaining belief’ is the f ifth process and entails fulfilling expectations using realities. However, it is only achieved if the expectations are real. Maintaining belief enables midwives â€Å"to know, be with and do for† (Kvale & Brinkmann, 2009). This final process brings all other processes together thereby forming one whole process. Brier (2008) describes it as holding individuals in esteem; believing in the person’s ability to realize set goals. The goal is to have a normal birth that includes a healthy infant and a well-being mother. In the real world, great emotions are always achieved with the importance of birth. The

The Bread Givers,the Smolinsky house is patriarchal in nature Essay

The Bread Givers,the Smolinsky house is patriarchal in nature - Essay Example Instances of such patriotism have been displayed throughout the story where the writer says,’ Traditional father searches for God through the Talmud and religious study’ (Yezeirska, 1925, xvi) specifying that Moses’ reading was confined only to reading Jewish sacred texts. Another instance where’ mother believed she might earn a place in the heaven by serving her husband well’ (Yezeirska, xvi) showed that the family was firm in traditional believes. Sara’s father’s attachment to Jewish culture has been depicted here as patriarchal characteristics. Surrounded by the lives of his family, the patriarchal nature of the father has a powerful role to play in this novel. It gives a winning note to his values when his daughter’s lives are destroyed due to his religious values and this rigidity has also been noted where Moses, even in dying state refuses to live with Sara and Hugo. The story was written somewhere between 1920 and the society and culture of that phase has an impact on the story. Even before that in the 19th century during the colonial period in America we find the prevalence of the class system. The upper class denoted the aristocrat class who were owners of large plantations. During the 19th century slavery was also present in the society and the plantation owners usually owned large number of slaves and worked hard to achieve higher standards of living. Post colonization, the immigration of Jews to the New York City has been talked about in the story. More than a merge, there was a clash of the two cultures. M ore specifically a struggle between the old and the new world was clearly noticed. Jews of that period were very particular about their traditions and appeared to be conservative. The Jewish people restricted from interacting with people of different cultural background. This is depicted in the story. Where Sara Smolinsky is opening up to accept the new concept of self independence imposed in American culture, Moses remains about

Anything that expresses my belief system Essay Example | Topics and Well Written Essays - 500 words

Anything that expresses my belief system - Essay Example No doubt everyone would think that is the most inhuman thing to a person. Why then do some people think abortion should be a human right when it is clear that it contravenes the moral pillars of our society? Many people thin that abortion is a fundamental human right that should be observed. I was one ardent support of abortion until my interaction with Juliet, a pro-life activist, who is now a good friend of mine. It was around 10 a.m. on a Saturday when I and my friend Rose set for an appointment with a doctor who was to perform an abortion for Rose. As we were travelling to the hospital, which was far off our residential area for fear of meeting people who knew us, I kept mulling over many things. What if this unborn child could be the future president of this country? What if the procedure goes wrong and Rose would never have another baby? What if our parents had done the same thing, would we be there today? The questions kept flooding my mind, but I would not confront my friend to stop what she had planned for an entire fortnight. As we sat patiently waiting for our turn with the doctor, a young beautiful lady approached us. She seemed to have known what service we were seeking. â€Å"My dear sister, abortion is not the best thing to do. Imagine if your mother had done the same thing to you, where would you be? It is ungodly and violates the child’s right to life†. These words keep ringing on my mind every moment I hear the word â€Å"abortion†. Despite all her attempts to woo Rose from aborting her baby, she insisted. Unfortunately, things never went well and Rose later succumbed from some complication she developed after procuring the abortion. Her inhumane behavior as Juliet put it turned against her. Kant morality emphasizes reason, duty and good will (Hill 20). Kant argues that we should pursue moral perfection. In many societies, moral values hold that murder is wrong. This universal agreement is what Kant refers

Movie review Example | Topics and Well Written Essays - 500 words

Movie Review Example Walter Lee is sure that investing the money in a liquor store will provide the most long-term financial security for the family. He has some friends that want to invest in the business with him, but they are not willing to put up any of their own cash. Momma Younger, played by Phylicia Rashad is sure that getting out of the dismal housing situation they are in would help the entire family most. She has dreams of a nice neighborhood and a spacious house where there is enough room for all the family members to breathe. She has set her sights on a pleasant little house in the Clybourne Park neighborhood. The only problem is this neighborhood is all white. The Youngers would be the first African-American family to live there. Other major characters that have their own dreams and desires that are attached to the money in some way are Benethea and Ruth. Benethea is the sister of Walter Lee and Ruth is Walter Lee’s wife. Their young son’s name is Travis. The updated production is loosely based on the original play. Some of the updating is unfortunate because the feel of the story is altered tremendously. I feel that Phylicia Rashad and Sean Combs are woefully miscast in this production. The original story is about a family that was less polished and more real than the one portrayed in this production. Rashad and Combs are too smooth in their delivery to have credibility as the matriarch and oldest son of a family struggling to get out of the ghetto. Their presence gives the story an air of people pretending (not very convincingly) that they are salt of the earth. Stylistically, the updated feel of the story robs the original of the edginess in the original story. Some of the criticism I feel towards this updated version stems from the way the family reacts to the blatant racism they face from their white neighbors. The family doesn’t seem shocked or even truly angry. Walter Lee seems to be resigned

Macro--economic Essay Example | Topics and Well Written Essays - 1500 words - 1

Macro--economic - Essay Example It will recover at some point, but we are probably two or three years away." 2. Introduction In February 2011, the Obama administration issued â€Å"Reforming America’s Housing Finance Market† (Reforming America’s Housing Finance Market – A Report To Congress, accessed 8 May, 2011). The extensive ranging and significant study was motivated by the view that: â€Å"The housing finance system must be reformed. It is the vital link to sustainable home ownership and rental options for millions of Americans, and it is central to our nation’s economy. We allowed its flaws to go unchecked for too long, contributing to a financial collapse that strained families, decimated communities, and pushed the economy into the worst recession since the Great Depression† (p.31). Since the housing market in the US is undergoing a period of depression even now, an analysis of the article with regard to aggregate demand and aggregate supply of the housing market is discussed in this report. Apart from this all other relevant areas of macro economics will be discussed with a summary at the end of the report as a conclusion will be added. 3.1 Macroeconomics According to Gwartney et al, (2006) macroeconomics is a part of the study of economics which centers on the aggregate economic system. Macroeconomics examines the economy at a national/global level and is related with the economy as a whole. According to Susan Wachter et al (2010), "Housing, which usually leads us out of recession and into recovery, will be a lagging indicator this time. Consumers will look to the health of the whole economy to decide whether to make a home purchase or not." 3.2 Analysis of macroeconomics with regard to housing situation in the US: CASE-SHILLER HOUSE PRICE INDEXES U.S. Home Price Index Quarterly 2000-2010 Source: Bloomberg The above graph shows that the rising fall of the house prices nationwide has exceeded 32% from the 2006 peak, as measured by the Case- S hiller House Price Index (chart). Almost five million households have lost their homes through legal proceedings or short selling. With the exclusion of house prices and legal proceeding, the majority housing-linked standards have reached the bottom, but a healthy revival is doubtful (Bloomberg). The fundamental issue with the residential housing market is linked to a constant imbalance between supply and demand. The basic demand for housing stays gloomy while the supply of unsold homes stays disproportionate. The result is evident as sales of homes are Home sales are dormant, new construction stays exceptionally low, and nationwide house prices carry on to weaken. The demand for housing is also at a low range inspite of low-cost in most major markets. This has led to negative look at the house prices by the consumers and new house hold creation has decreased by 50%. The supply also is on the decrease because there were massive number of houses built during 2000-2007 and record numb er of foreclosures (Bloomberg). 3.3 Aggregate demand curves Source: McConnell, 2010 Aggregate demand curve depicts the quantities of real GDP that purchasers jointly want to buy at each potential price level. The correlation between the price level and the quantity of real GDP required is reverse or negative. In reality with every increase in the real GDP

ENHANCED ACADEMIC WRITING AND PRACTICE ED2215 (Ass 2) Essay

ENHANCED ACADEMIC WRITING AND PRACTICE ED2215 (Ass 2) - Essay Example The issue for betterment of the school environment is intrinsically related to the social and cultural environment of the state and society. Further, such issues seen from a judicial and moral standpoint needs be addressed while generating social policies related to the educational environment. The policies generated by the social and educational leaders must generate positive outcomes to help the due achievement of such moral and social goals. The educational and social leaders must focus directly on the betterment of the pedagogical and courseware areas of the educational institutions rather than rendering more concentration on changing the organizational structure. Furthermore, the educational and social change must proceed in a spontaneous manner and must not be restricted in bettering up the educational atmosphere of any particular institution. Development brought about in a particular institution without catering to a holistic view disturbs the fragment of social equity in the state or region. In the context of United Kingdom, the Labor Party during the 1997 period took stance of bringing about a large-scale educational and social reform in the country. ... passing on of the first term the labor party failed to confer further more alterations in the educational atmosphere of the region for which the developments brought about started stagnated with the arrival of the second term. The external leadership imparted by political and social leaders to bring about a mass scale alteration of the educational and social sphere of the region fails to make a sustainable stand unless otherwise recognized by the educational institutions themselves. In other words, the educational institutions are required to perform in close cooperation with the social and cultural ideology of the region to judge their aspirations and aims. The external leadership on the other hand must help create an atmosphere that would promote development of the educational and pedagogical procedure of the institutions. Thus, an environment must be created which would help in the implementation of the policies framed at the national and state level in the educational organizatio ns (Hopkins, 2005, p. 4). Promoters of Educational Development Hopkins outlined four major areas that can help in bringing about a stream of reforms that would help in the formation of an ideal educational environment in a region or state. Hopkins states that an educational environment must focus in designing a personalized approach with the student community that would help in the betterment of the educational patterns. Further, the pattern of the teaching imparted by the educational institution must focus on incorporating professional ideas that would help the students to eke out a living in the future. In the process of bringing about a change in the educational environment, the educational organizations must not function in an isolated environment. Rather they must enthusiastically

Reagans War on Drugs Essay Example for Free

Reagans War on Drugs Essay The phrase â€Å"sex, drugs, and rock and roll† held true to its well-earned spot in 1970’s and 1980’s society. With a new, looser culture, explicit music, raunchy and rambunctious movies as well as a societal focus on many things immoral, it was an era of challenging social norms. As the use of recreational and psychoactive drugs, as well as alcohol, increased, a new problem arose; how does law enforcement and the government undo the damage being made by this new society? Laws were passed, bureaus and commissions were formed, and the President of the United States began what he called â€Å"The War on Drugs†. Over the years, some of these solutions have proven to make some impact. The initiation, tactics, and attempts at dealing a major blow to drug abuse have all affected the way America sees drugs today. A new type of warfare had made its way into the country, and after all these years, it has made its fair share of positive and negative effects. â€Å"Just say no. † (Reagan Declares War on Drugs, 1982). This was one of the many scare tactics used in America’s new war on drugs. The president needed to construct a plan to detract the public eye from drugs’ fame. Nancy Reagan was equally as adamant about keeping America safe and clean. She traveled to and spoke at many schools, enforcing the idea of simply refusing the temptation of drugs. Before the Reagan’s began their wartime, Richard Nixon introduced his own ‘war’ on drugs, stating, â€Å"America’s public enemy number one is drug abuse. In order to fight and defeat this enemy, it is necessary to wage a new, all-out offensive. † (Remarks About an Intensified Program for Drug Abuse Prevention, 1971). This mindset was yet another strategy used to make America energized and willing to fight this war. Nixon passed the Comprehensive Drug Abuse Prevention and Control Act in the 1970’s as a way to keep a constant eye on the drug industry. This act required the pharmaceutical industry to maintain physical security and strict record keeping for certain types of drugs. When Reagan became president he gave a speech, announcing, â€Å"We are taking down the surrender flag that has flown over so many drug efforts; we’re running up a battle flag. † (Reagan’s ‘War on Drugs’ Speech, 1981). America’s first clear attack on the use of drugs was verbal – this strategy temporarily affected the country, but more had to be done to combat this enemy. The United States and its’ presidents had to take a fighting stance if they wanted to decrease drug abuse. One of the first instances of this was President Nixon’s Operation Intercept. Announced even before the official ‘war’ on drugs began – in September 1969 – this campaign focused on reducing the amount of cannabis entering the United States from Mexico. Following this effort, the United States government funded the controversial Methadone Maintenance Program. Methadone Maintenance treatment, a program in which addicted individuals receive daily doses of methadone, was developed as part of a broad, multicomponent treatment program. † (Center for Disease Control, 2002). After Nixon’s trials and failures, President Carter went at the fight with a different, looser approach. Carter called for the decriminalization of marijuana. With a less vicious outlook, Carter believed that the punishment of a crime should not be more brutal than that said crime. President Carter’s tactic proved unworthy, as while he was in office, use of cocaine increased dramatically. Finally, as Reagan took center stage and stepped into presidential office, he kept a strong belief against this criminal act. Reagan created the Office of National Drug Control Policy to eradicate illicit drug use, manufacturing and trafficking of drugs, as well as put an end to drug related violence and crimes. Reagan put policies in place to strengthen his deadly grasp on drug-ridden society. He required mandatory minimum prison sentences for drug dealers – a policy he initiated in hopes of making drugs seem less glamorous and infinitely more criminal. He began the South Florida Task Force, which dealt with the increase of drug trafficking in Southern Florida. This force worked hand in hand with the Drug Enforcement Agency (DEA) and the Federal Bureau of Investigations (FBI). Operation Swordfish was put in place by the DEA to attack international drug organizations. â€Å"The operation was dubbed operation swordfish because it was intended to snare the ‘big fish’ in drug trade. † (Drug Enforcement Agency, Operation Swordfish, 1980). Vice President George H. W. Bush began insisting that the CIA and U. S. Military become involved in drug interdiction efforts. The Drug-Free Media Campaign Act of 1988 was passed in hopes to convince America’s youth and future generations to stray away from drugs. After all of these battles, did America finally win this war? â€Å"The U. S. Federal Government spent over $15 billion in 2010 on the War on Drugs, a rate of about $500 per second. † (The Budgetary Impact of Drug Prohibition, 2010). This is a sign that perhaps Reagan’s War on Drugs wasn’t quite as effective as he had so hoped. The United States today has the highest incarceration rate and prison population of any country in the world. This is provided in part by the amount of arrests and incarcerations due to drug sentencing guidelines and policies. â€Å"In the 1980’s, while the number of arrests for all crimes had risen by 28%, the number of arrests for drug offenses rose 126%. † (Bureau of Justice Statistics, 2010). This did not specifically mean that there were more drug-related crimes, but that law enforcement had simply cracked down on the arrests of said crimes. In comparison, Time Magazine’s study states, â€Å"Drug convictions went from 15 inmates per 100,000 adults in 1980 to 148 in 1996, an almost tenfold increase. More than half of Americas federal inmates today are in prison on drug convictions. In 2009 alone, 1. 66 million Americans were arrested on drug charges†¦Ã¢â‚¬  (Time Magazine, 2012). While this war on drugs may still be in effect, it may have positive outcomes for further in the future. As for the time being, America has two main stances on the subject: some call for further reparations in the war on drugs, while others believe the war is unsuccessful, and the focus needs to be shifted to more important and dire issues. The War on Drugs has failed. † (19 Member Commission, June 2, 2011). In another instance, a poll was taken throughout the country, and its results, â€Å"three in four Americans believe that the War on Drugs is failing. † (October 2008 Poll). Suggestions of decriminalization have been made by many. The legalization of drugs is claimed to have many positive effects on the country as a whole, including positive economic effects. While this ‘war’ on drugs started off as a full-fledged attack on all users and distributors of illegal narcotics, it seems to have transformed into a war against itself: will continuing these attacks help the country, or will allowing certain, less harmful drugs to be legal prove to be a more reasonable solution? â€Å"Legalizing drugs would save taxpayers $76. 8 billion a year in the United States $44. 1 billion from law enforcement savings, and at least $32. 7 billion in tax revenue†¦Ã¢â‚¬  (Harvard Study by Jeffrey A. Miron, 2008). In addition, the policies put into effect by Nixon and Reagan may ave had a positive impact on crime in the United States, but it may not have been in the way they had wished. â€Å"Drugs got enormously cheaper so users didn’t have to hit as many old ladies over the head and steal their pocketbooks. † (Travis Wendel, â€Å"More Drugs, Less Crime†, 2010). Murders, robberies and other violent crimes seemed to decline as the price of drugs went down – could this happen if drugs were legalized as well? America in this day and age has a vast amount of governmental and international issues in desperate need of resolution – is drug control still one of them? The United States of America is a country known by many as ‘land of the free’, but does this mean that its citizens should be allowed to participate in activities such as drug use with such a negative connotation? Did Reagan’s War on Drugs really make an effective impact on the way America sees drugs today? The answer to that question is this – while his tactics may not have worked the way he had desired, America as a whole has indeed seen less drug related crime. This does not mean it does not exist, nor does it mean that by legalizing drugs will solve all of the country’s problems. What this does mean is that Reagan’s war on drugs did not put an end to drug use, but it just may have opened America’s eyes to more clear and present danger. While drugs are in no way going to solve America’s problems, the once War on Drugs may now need to be adjusted to a name more fitting. A War on Crime as a whole perhaps? A War on Drug Related Violence? Reagan had the correct idea, now the country can put it into proper use. His War was not an end all war, but it just may have been enough to enhance America as a whole.

Report About 3G And 4G Technologies

Report About 3G And 4G Technologies Write a report about 3G and 4G technologies. Your report should cover: The main (both in definition and technically) differences between 3G and 4G. Are they both addressing the same things? The main attributes and differences between WiMax and LTE. Which kind of companies are implementing which type of technology? Under what circumstances would one be preferable over the other? Dependence on underlying infrastructure. You must submit the assignment via safe assign under blackboard and also via the registry. Introduction Wireless communication is part of todays world and is greatly in demand as such resources are preferred in todays world and so the sales are increasing day by day with equipment which involves wireless communication. The G which means generation, in the technology today amongst phones covers the technology improvement in the last few decades. The first mobile phone technology started with 1G which involved analogue technology. In the early 1990s the next generation of communication developed named 2G which was in a digital technology which also had text messaging with the idea of SIM cards coming into practice. SIM is short for (Subscriber Identity Module). Other technologies that evolved were CDMA(Code Division Multiple Access) and GSM (Global System for Mobile Communication). The next generation which followed made the data carrying better, making it potential to carry information such as websites as how they were originally. In 3G technology the iPhone has become the latest. As of today the agreement of 4G technology has not yet been established. It has been planned to have fast transfer speeds and should have good security. Something else that the 4G technology should meet is that it should reduce blips in transfer of the device when moving between different networks. The 4G mobile network should also be able to use the networks like the ones on the internet with IP addresses. 4G mobile is not yet implemented as an approved set of standards, so its characteristics are at present simply goals rather than requirements. As well as considerably desired increasing data transfer speeds, 4G mobile as well as should use improved security measures, When a device moves one place to another place between this area covered by different network reduce the blips in transmission is the another goal .4G mobile networks should also use a network based on the IP address system used for the internet. Two major systems using 4G technologies are WiMax and Long Term Evolution. WiMax began testing its 4G technology in Baltimore in 2008. The opposite system LTE was expected to be ready to be tested in 2010 and is expected to be ready for use in 2013. All this information above is described in detail in this research. All the topics covered above are broadened below. 3G 3G technology comes with better features than previous mobile network technologies. It has transmission which is at high speed, better multimedia access as well as connection globally.3G used with mobile phones a connects the phone with the internet and other IP connections which allow voice as well as video calls to be accessed. Not only this but also helps to download and surf the internet. From lower mobile technologies, 3G technology has higher data speed, better audio and video access, video calling support, Web use at quicker speeds and TV through the Internet. In 3G networks the transfer speed is between 128 and 144 kbps for devices that are fast and 384 kbps for slower ones. Wireless fixed LANs have a sped beyond 2Mbps. W-CDMA,TD-SCDMA, WLAN and cellular radio, among others are some of the technologies that 3G includes.[1] WCDMA The third-generation Universal Mobile Telecommunications System (UMTS) will be able to deliver high data rates of up to 384 kb/s at widearea applications or even 2 Mb/s indoors . This is achieved by using wide-bandwidth signals with Code-Division for Multiple Access (W-CDMA). The user data are multiplied by a fast pseudorandom spreading sequence before phase modulating the radio-frequency (RF) carrier. The resulting signals which are then broadcast have a bandwidth of approximately 4.5 MHz. Parameter W-CDMA Uplink 1920-1980 MHz Downlink 2110-2170 MHz Access DS-CDMA Duplex procedure FDD Modulation QPSK Pulse shaping Root-raised cos, Chip rate ÃŽÂ ± = 0:22 User data rate 384 kb/s; 2 Mb/s Bandwidth/channel 5MHz Max. output power 21 dBm (Class IV) TD-SCDMA It was proposed by the China Wireless Telecommunication Standards group to the ITU in 1999.60MHz has been reserved for CDMA2000 and UMTS, but TD-SCDMA has reserved 155MHz.In common with UMTS-TDD,TD-SCDMA does not require separate uplink and downlink and offer speeds from as low as 1.2kbps up to 2 Mbps. Uplink and downlink traffic can be transferred in the same frame but in different time slots, and there can be up to 16 codes allocated per slot, more time slot can be devoted to downlink transfer than in the uplink. This allocation of time slots is dynamic and if a symmetric allocation is required, which is usually the case for a telephone call, then this will also be allocated the required resources. The minimum frequency band required for this system is 1.6 MHz and the chip rate is 1.28Mcps.it does not have soft handover mechanism but has a system similar to GSM where the mobile device are tightly synchronized to the network, and it is from here that the term syschronous is derived. it is designed to work with a GSM core network is similar way to WCDMA and can also use the UTRAN signalling stack when it is deployed as a complementary technology. The frame is 5 ms rather than 10ms in WCDMA and split into seven slot. [2]. 4G The future system technology of 4G should bring something that is very enchancing when compared to the previous technologies. 4G yet does not have a meaning as it has not yet been established. However the current targets for it are as follows: system interoperability:-flexible interoperability of the various kind of existing wireless network, such as satellite, cellular wireless, WLAN, PAN and system for wireless access to the fixed network. It ability to roam between multiple wireless and mobile standards. Due to the interoperability of different mobile and wireless network through the same terminal we can identify the three possible configuration. There are 1.Multimode terminals:-this is obviously achieved by incorporating multiple interfaces to the terminal, one for the access methods of every different kind of wireless network. The ability to use many access methods will enable users to use a single device to access the 4G network irrespective of the particular access method used. 2.Overlay network:- In this architecture user will access the 4G network through the Access Points of an overall network. The AP will perform protocol translation and Qos negotiation for the connections. Since APs can monitor the resource used by a user, this architecture supports single billing and subscription. 3.Common access protocol:-this choice calls for use one or two standard access protocol by the wireless networks. A possible option is for the wireless networks to use either ATM cells with additional headers or WATM cells. Terminal bandwidth and battery life:- Future generation network will be covering a large range of banwidths from about a couple of kbps to about 100 Mbps or above. The battery life is expected to be about a week. This will happen with a reduction of the size of the battery. Packet-switched fixed network.:- This 4G technology will use wireless IP based fixed networks which will be able to connect the mobiles with the wireless networks effectively. Varying quality of bandwidth for wireless access:- Having a range of networks together will cause it to overlap with other networks. Due to where they are, the user will be abl to use different qualities of wireless by the change of bandwidth. Distribution layer: This layer of the network will be able to help with digital video as well as broadcasting and due to a good coverage will cover all areas. Cellular layer: This layer of the wireless network will give a load of capacity providing many users as well as provide good coverage in highly populated areas. It will allow data sizes of over 2 Mbps. The cell size will also be small compared to the distribution layer, and will support good mobility. Hot-spot layer: This layer will help with good service over a short distance. It will include WLAN systems like IEEE 802.11 and HIPERLAN. This layer will not provide great coverage in particular as it is a short distance however roaming should be available. Personal network layer: This layer will include wireless connection however in short ranges say through the use of Bluetooth. Mobility will be less but roaming should be available. Fixed layers: This layer uses an access system which is fixed. Advanced base stations: In the future for networks, the new smart antennas will make the capacity bigger as well as base stations having self-configuration not needing the need for employment. This would reduce costs. They will include a good range of terminals. High data rates: The 3G system will be changed using what it has already to form the new 4G generation. The 4G generation will offer higher speed than the 3G generation. The introduction of 4G needs specific targets which are named above. To get to these targets, 4G needs the basis on how to achieve this which is explained in detail below.[1]. How 4G works: In the networks which have the 4G wireless technology, each one will be given an IP address which will have a home IP address and an address which represents its real location. When the computer in the Internet wants to communicate with another device perhaps a mobile phone in the wireless network. The computer will be able to send packets to the IP address of the 4G technology getting to know the home address too. To the phones address, the directory will send the packet through a tunnel, or a mobile IP, whilst on the meantime the directory server would also let the computer know that the phones address is correct. After this the other packets can be sent. The use of4G-IP address (IPv6) is that it will be able to carry more info than in the past with the IP address (IPv4). In this IP address, software can use them to tell the differences between services and to communicate with network areas of different sorts. This could be with the computer and the phones network. An example includes Moreover which uses 4G technology not only has this transmission way but also uses OFDM, MC-CDMA, LAS-CDMA, UWB *7 and Network-LMDS.[4] Orthogonal Frequency Division Multiplexing abbreviated as OFDM, passes on figures on a great quantity through a radio wave. Changing the radio signal into many small signals then transferred at the same time through different frequencies to the receiver is the method in which this is carried out. OFDM is a digital technology through modulation which increase strength of these signal; this is good for high digital data transition. This is a great digital technology method in which through the process of modulation increases the strength of the signal and is good for a transition of high quality digital data.[2] Orthogonal Frequency Division Multiplexing simple function In this time, users might have a good question about how theses waves targeted the correct destination. A OFDM makes the radio wave target the right place though a couple of devices which are wireless, which make a connection tunnel when they start communication. After connecting the target, the radio wave splits into smaller signals which have the correct direction towards the target. MS-CDMA stands for Multi-Carrier Code Division Multiple Access, which is actually OFDM with a CDMA overlay. The users are multiplexed with orthogonal codes to differentiate users in MS-CDMA and single-carrier CDMA systems. It allows flexible system design between cellular system and signal cell system. However, in MC-CDMA, each user can be allocated several codes, where the data is spread in time or frequency. LAS-CDMA the shortened form for Large Area Synchronized Code Division Multiple Access, is made through by LinkAir Communication which is basically wireless technology through the developed 4G technology. LAS-CDMA makes voice capacity better, with high speed and the latest original solution called Code-Division Duplex (CDD) which combines the LAS-CDMA technology with the greater data transmission type of Time-Division Duplex (TDD). This combination makes Code-Division Duplex to be very spectrally efficient as well as having high speed available today as a great system. LAS-CDMA is seen as being the great 4G technologys World Cell. If two wireless devices for instance are a quite big distance apart then using this protocol which has IPv6 to create the connection. In the 4G world, UWB radio which solves the multi-path weakening matters through its clever use of electrical impulses which has all frequencies at one time. Due to its low-power condition though, this UWB cannot be used outside of being indoors or underground. UWB should be used however with OFDM which cal transfer digital data on a large scale. This is positive though as the UWB would be running insides equally as the OFDM runs outside which means that the signal can stay strong. UWB also needs to be used in small distances inside the buildings through 4G technology. The broadband technology which is wireless used to carry video, data Internet as well as voice in 25 GHz is the Network-LMDS Local Multipoint distribution system. This method makes sure all these things are carried together at once, and this can be the result in the fading issue locally. [4] Differences between 3G and 4G: The main factors in which 3G and 4G technologies vary is due to their services, their ways of transmission, access to the web, the rates of transfer, security as well as quality. 3G technology can only carry upto the speed of about and up to 2 Mbps however 4G technology can go much higher to a better speed. 4G technologies can provide global connection whereas for 3G markets it is difficult to roam globally. Technology which uses 4G can provide global roaming at a lower price. 3g is based on the notion through circuits and packets through things like WCDMA, CDMA and TD-SDMA. However 4G uses the use of packets. As mentioned above about the differentiation between the 3G and 4G, this has been broadened in the tab le below. Feature 3G wireless technology 4G Wireless technology Speed Up to 2Mbps Full-mobility: up to 100Mbps Low-mobility:up to 1Gbps Service Difficult of global roaming Expensive good for voice transmission roaming smoothly inexpensive good for any type of transmission Core Network Wide-area concept Circuit and packet switching broadband IP-based Entirely packet switching Technologies WCDMA CDMA TD-SDMA All access convergence Main: OFDM MC-CDMA LAS-CDMA UWB Network-LMPS Wimax Wimax which stands for Worldwide Interoperability for Microwave Access was made to give a ordinary structure for wireless connectivity in permanent, moveable, and mobile environments. WiMAX is a wireless technology intended to give high throughput over a distance. It gives the quick broadband of link. It also provides wireless access which reduces costs which involves the fibre and making buildings. It has a range that goes beyond WiFi. A WiMAX uses two hardware components a WiMAX tower as well as WiMAX receiver. This tower covers a 30 mile radius. The tower joins to the Internet using a wide connection through a wireline, or it offers a wireless link to other WiMAX towers with Line Of Site (LOS for short) microwave links. The receiver could be anything. NLOS (non-line of sight in full) connections join devices to the tower using a frequency range of 2-11 GHz as low wavelength signals are strong. LOS connections however do not cover as large area but covers and area of 4-6 miles. QoS is the aspect in a technology to deliver high bandwidth services. Examples of such include VoIP and IP video services as well as other services as such. To provide such QoS service, the WiMax need to make sure they have a low latency.[4] WiMAX security is defined in the Privacy Sub-layer in the MAC Layer, as specified by WiMAX standards. Fixed WiMAX (802.16-2004) typically uses X.509 certificates for authentication and 56-bit Digital Encryption System (DES), while Mobile WiMAX (802.16e-2005) uses EAP for authentication and Advanced Encryption System (AES) for encryption. Both employ Privacy Key Management (PKM) for authentication between base station and subscriber station.[5][9]. LTE Long Term Evolution (LTE) is a 4G wireless broadband technology made by the Third Generation Partnership Project. LTE has many benefits for not only the consumer but also the workers too: Performance and capacity one request that the LTE is to provide downlink rates of a minimum of 100Mbit/s and needs the technology to allow for speeds that are over 200Mbit/s. Simplicity 1. From below 5MHz up to 20MHz, LTE supports carrier bandwidths. LTE also supports both FDD (Frequency Division Duplex) and TDD (Time Division Duplex). Ten paired and four unpaired spectrum bands have so far been identified by 3GPP for LTE. it is easiest to deploy 10MHz or 20MHz carriers, and eventually deploy LTE in all bands. 2.plug-and-play, self-configuration and self-optimization will simplify and reduce the cost of network roll-out and management. 3.LTE will be deployed in parallel with simplified, IP-based core and transport networks that are easier to build, maintain and introduce services on. Wide range of terminals- LTE supports hand-over and roaming to existing mobile networks, all devices can have ubiquitous mobile broadband coverage from day one[6].[9] COMPARSION BETWEEN WIMAX AND LTE Aspect Wimax LTE Access technology Downlink(DL) Uplink(UL) OFDMA OFDMA OFDMA SC-FDMA Frequency band 2.3-2.4GHz,2.496-2.69GHz ~2GHz Bit-rate: DL UL 75Mbps(MIMO 2TX 2RX) 25Mbps 100Mbps(MIMO 2TX 2RX) 50Mbps Channnel bandwidth 5,8.75,10MHz 1.25-20MHz Cell radius 2-7km 5km Cell capacity 100-200 users >200 users in 5MHz >400 users for large BW Spectral efficiency 3.75[bits/sec/Hz] 5[bits/sec/hz] Mobility: Speed Handovers Up to 120km/h Optimized hard handovers supported Up to 250km/h Inter-cell soft handovers supported Legacy IEEE802.16a through 16d GSM/GPRS/EGPRS/UMTS/HSPA MIMO DL UL No. of code words 2Tx X 2Rx 1Tx X NRx(Collaborative SM) 1 2Tx X 2RX 2Tx X 2Rx 2 Standardization coverage IEEE 802.16e-2005 PHY and MAC CN standardization in Wimax RAN(PHY+MAC)+CN Roaming framework Wimax forum Auto through existing GSM/UMTS [7].Verizon has devoted to using Long Term Evolution starting by soon, ensuring to deliver ten times the data throughput of 3G technologies in the current time. Others, including NTT DoCoMo in Japan, France Telecom, Vodafone in the UK, ATT, and T-Mobile have said also they will use LTE rather than WiMAX. Meanwhile, Sprint, Clearwire, and Comcast in the U.S., UQ Communications in Japan, and Yota in Russia are all competitively using 4G networks suitable for mobile networks using todays edition of WiMAX, 802.16e (2 to 10 Mbps), in inner-city markets where they will without doubt compete with 3G (and later, LTE) sources. The WiMAX Forum declares that 504 operators in 145 countries have organized WiMAX, but many use older 802.16d technology that however cannot provide mobile services, and many are small operators in developing countries or pastoral areas.[8] Conclusion:- In every generation, when there is a default, the next following generation gets rid of this and a new idea or notion is found as a result. However at some points this may be difficult to happen due to several reasons. The world is looking forward for the most intellectual technology that would bond the full earth. New ideas are being introduced by researchers throughout the world, but new ideas introduce new challenges. There are several issues yet to be solved like integrating the mobile world to the IP based core network, resourceful billing system, and smooth hand off mechanisms.

Numerical Differential Equation Analysis Package

Numerical Differential Equation Analysis Package The Numerical Differential Equation Analysis package combines functionality for analyzing differential equations using Butcher trees, Gaussian quadrature, and Newton-Cotes quadrature. Butcher Runge-Kutta methods are useful for numerically solving certain types of ordinary differential equations. Deriving high-order Runge-Kutta methods is no easy task, however. There are several reasons for this. The first difficulty is in finding the so-called order conditions. These are nonlinear equations in the coefficients for the method that must be satisfied to make the error in the method of order O (hn) for some integer n where h is the step size. The second difficulty is in solving these equations. Besides being nonlinear, there is generally no unique solution, and many heuristics and simplifying assumptions are usually made. Finally, there is the problem of combinatorial explosion. For a twelfth-order method there are 7813 order conditions! This package performs the first task: finding the order conditions that must be satisfied. The result is expressed in terms of unknown coefficients aij, bj, and ci. The s-stage Runge-Kutta method to advance from x to x+h is then where Sums of the elements in the rows of the matrix [aij] occur repeatedly in the conditions imposed on aij and bj. In recognition of this and as a notational convenience it is usual to introduce the coefficients ci and the definition This definition is referred to as the row-sum condition and is the first in a sequence of row-simplifying conditions. If aij=0 for all i≠¤j the method is explicit; that is, each of the Yi (x+h) is defined in terms of previously computed values. If the matrix [aij] is not strictly lower triangular, the method is implicit and requires the solution of a (generally nonlinear) system of equations for each timestep. A diagonally implicit method has aij=0 for all i There are several ways to express the order conditions. If the number of stages s is specified as a positive integer, the order conditions are expressed in terms of sums of explicit terms. If the number of stages is specified as a symbol, the order conditions will involve symbolic sums. If the number of stages is not specified at all, the order conditions will be expressed in stage-independent tensor notation. In addition to the matrix a and the vectors b and c, this notation involves the vector e, which is composed of all ones. This notation has two distinct advantages: it is independent of the number of stages s and it is independent of the particular Runge-Kutta method. For further details of the theory see the references. ai,j the coefficient of f(Yj(x)) in the formula for Yi(x) of the method bj the coefficient of f(Yj(x)) in the formula for Y(x) of the method ci a notational convenience for aij e a notational convenience for the vector (1, 1, 1, ) Notation used by functions for Butcher. RungeKuttaOrderConditions[p,s] give a list of the order conditions that any s-stage Runge-Kutta method of order p must satisfy ButcherPrincipalError[p,s] give a list of the order p+1 terms appearing in the Taylor series expansion of the error for an order-p, s-stage Runge-Kutta method RungeKuttaOrderConditions[p], ButcherPrincipalError[p] give the result in stage-independent tensor notation Functions associated with the order conditions of Runge-Kutta methods. ButcherRowSum specify whether the row-sum conditions for the ci should be explicitly included in the list of order conditions ButcherSimplify specify whether to apply Butchers row and column simplifying assumptions Some options for RungeKuttaOrderConditions. This gives the number of order conditions for each order up through order 10. Notice the combinatorial explosion. In[2]:= Out[2]= This gives the order conditions that must be satisfied by any first-order, 3-stage Runge-Kutta method, explicitly including the row-sum conditions. In[3]:= Out[3]= These are the order conditions that must be satisfied by any second-order, 3-stage Runge-Kutta method. Here the row-sum conditions are not included. In[4]:= Out[4]= It should be noted that the sums involved on the left-hand sides of the order conditions will be left in symbolic form and not expanded if the number of stages is left as a symbolic argument. This will greatly simplify the results for high-order, many-stage methods. An even more compact form results if you do not specify the number of stages at all and the answer is given in tensor form. These are the order conditions that must be satisfied by any second-order, s-stage method. In[5]:= Out[5]= Replacing s by 3 gives the same result asRungeKuttaOrderConditions. In[6]:= Out[6]= These are the order conditions that must be satisfied by any second-order method. This uses tensor notation. The vector e is a vector of ones whose length is the number of stages. In[7]:= Out[7]= The tensor notation can likewise be expanded to give the conditions in full. In[8]:= Out[8]= These are the principal error coefficients for any third-order method. In[9]:= Out[9]= This is a bound on the local error of any third-order method in the limit as h approaches 0, normalized to eliminate the effects of the ODE. In[10]:= Out[10]= Here are the order conditions that must be satisfied by any fourth-order, 1-stage Runge-Kutta method. Note that there is no possible way for these order conditions to be satisfied; there need to be more stages (the second argument must be larger) for there to be sufficiently many unknowns to satisfy all of the conditions. In[11]:= Out[11]= RungeKuttaMethod specify the type of Runge-Kutta method for which order conditions are being sought Explicit a setting for the option RungeKuttaMethod specifying that the order conditions are to be for an explicit Runge-Kutta method DiagonallyImplicit a setting for the option RungeKuttaMethod specifying that the order conditions are to be for a diagonally implicit Runge-Kutta method Implicit a setting for the option RungeKuttaMethod specifying that the order conditions are to be for an implicit Runge-Kutta method $RungeKuttaMethod a global variable whose value can be set to Explicit, DiagonallyImplicit, or Implicit Controlling the type of Runge-Kutta method in RungeKuttaOrderConditions and related functions. RungeKuttaOrderConditions and certain related functions have the option RungeKuttaMethod with default setting $RungeKuttaMethod. Normally you will want to determine the Runge-Kutta method being considered by setting $RungeKuttaMethod to one of Implicit, DiagonallyImplicit, and Explicit, but you can specify an option setting or even change the default for an individual function. These are the order conditions that must be satisfied by any second-order, 3-stage diagonally implicit Runge-Kutta method. In[12]:= Out[12]= An alternative (but less efficient) way to get a diagonally implicit method is to force a to be lower triangular by replacing upper-triangular elements with 0. In[13]:= Out[13]= These are the order conditions that must be satisfied by any third-order, 2-stage explicit Runge-Kutta method. The contradiction in the order conditions indicates that no such method is possible, a result which holds for any explicit Runge-Kutta method when the number of stages is less than the order. In[14]:= Out[14]= ButcherColumnConditions[p,s] give the column simplifying conditions up to and including order p for s stages ButcherRowConditions[p,s] give the row simplifying conditions up to and including order p for s stages ButcherQuadratureConditions[p,s] give the quadrature conditions up to and including order p for s stages ButcherColumnConditions[p], ButcherRowConditions[p], etc. give the result in stage-independent tensor notation More functions associated with the order conditions of Runge-Kutta methods. Butcher showed that the number and complexity of the order conditions can be reduced considerably at high orders by the adoption of so-called simplifying assumptions. For example, this reduction can be accomplished by adopting sufficient row and column simplifying assumptions and quadrature-type order conditions. The option ButcherSimplify in RungeKuttaOrderConditions can be used to determine these automatically. These are the column simplifying conditions up to order 4. In[15]:= Out[15]= These are the row simplifying conditions up to order 4. In[16]:= Out[16]= These are the quadrature conditions up to order 4. In[17]:= Out[17]= Trees are fundamental objects in Butchers formalism. They yield both the derivative in a power series expansion of a Runge-Kutta method and the related order constraint on the coefficients. This package provides a number of functions related to Butcher trees. f the elementary symbol used in the representation of Butcher trees ButcherTrees[p] give a list, partitioned by order, of the trees for any Runge-Kutta method of order p ButcherTreeSimplify[p,,] give the set of trees through order p that are not reduced by Butchers simplifying assumptions, assuming that the quadrature conditions through order p, the row simplifying conditions through order , and the column simplifying conditions through order all hold. The result is grouped by order, starting with the first nonvanishing trees ButcherTreeCount[p] give a list of the number of trees through order p ButcherTreeQ[tree] give True if the tree or list of trees tree is valid functional syntax, and False otherwise Constructing and enumerating Butcher trees. This gives the trees that are needed for any third-order method. The trees are represented in a functional form in terms of the elementary symbol f. In[18]:= Out[18]= This tests the validity of the syntax of two trees. Butcher trees must be constructed using multiplication, exponentiation or application of the function f. In[19]:= Out[19]= This evaluates the number of trees at each order through order 10. The result is equivalent to Out[2] but the calculation is much more efficient since it does not actually involve constructing order conditions or trees. In[20]:= Out[20]= The previous result can be used to calculate the total number of trees required at each order through order10. In[21]:= Out[21]= The number of constraints for a method using row and column simplifying assumptions depends upon the number of stages. ButcherTreeSimplify gives the Butcher trees that are not reduced assuming that these assumptions hold. This gives the additional trees that are necessary for a fourth-order method assuming that the quadrature conditions through order 4 and the row and column simplifying assumptions of order 1 hold. The result is a single tree of order 4 (which corresponds to a single fourth-order condition). In[22]:= Out[22]= It is often useful to be able to visualize a tree or forest of trees graphically. For example, depicting trees yields insight, which can in turn be used to aid in the construction of Runge-Kutta methods. ButcherPlot[tree] give a plot of the tree tree ButcherPlot[{tree1,tree2,}] give an array of plots of the trees in the forest {tree1, tree2,} Drawing Butcher trees. ButcherPlotColumns specify the number of columns in the GraphicsGrid plot of a list of trees ButcherPlotLabel specify a list of plot labels to be used to label the nodes of the plot ButcherPlotNodeSize specify a scaling factor for the nodes of the trees in the plot ButcherPlotRootSize specify a scaling factor for the highlighting of the root of each tree in the plot; a zero value does not highlight roots Options to ButcherPlot. This plots and labels the trees through order 4. In[23]:= Out[23]= In addition to generating and drawing Butcher trees, many functions are provided for measuring and manipulating them. For a complete description of the importance of these functions, see Butcher. ButcherHeight[tree] give the height of the tree tree ButcherWidth[tree] give the width of the tree tree ButcherOrder[tree] give the order, or number of vertices, of the tree tree ButcherAlpha[tree] give the number of ways of labeling the vertices of the tree tree with a totally ordered set of labels such that if (m, n) is an edge, then m ButcherBeta[tree] give the number of ways of labeling the tree tree with ButcherOrder[tree]-1 distinct labels such that the root is not labeled, but every other vertex is labeled ButcherBeta[n,tree] give the number of ways of labeling n of the vertices of the tree with n distinct labels such that every leaf is labeled and the root is not labeled ButcherBetaBar[tree] give the number of ways of labeling the tree tree with ButcherOrder[tree] distinct labels such that every node, including the root, is labeled ButcherBetaBar[n,tree] give the number of ways of labeling n of the vertices of the tree with n distinct labels such that every leaf is labeled ButcherGamma[tree] give the density of the tree tree; the reciprocal of the density is the right-hand side of the order condition imposed by tree ButcherPhi[tree,s] give the weight of the tree tree; the weight (tree) is the left-hand side of the order condition imposed by tree ButcherPhi[tree] give (tree) using tensor notation ButcherSigma[tree] give the order of the symmetry group of isomorphisms of the tree tree with itself Other functions associated with Butcher trees. This gives the order of the tree f[f[f[f] f^2]]. In[24]:= Out[24]= This gives the density of the tree f[f[f[f] f^2]]. In[25]:= Out[25]= This gives the elementary weight function imposed by f[f[f[f] f^2]] for an s-stage method. In[26]:= Out[26]= The subscript notation is a formatting device and the subscripts are really just the indexed variable NumericalDifferentialEquationAnalysis`Private`$i. In[27]:= Out[27]//FullForm= It is also possible to obtain solutions to the order conditions using Solve and related functions. Many issues related to the construction Runge-Kutta methods using this package can be found in Sofroniou. The article also contains details concerning algorithms used in Butcher.m and discusses applications. Gaussian Quadrature As one of its methods, the Mathematica function NIntegrate uses a fairly sophisticated Gauss-Kronrod-based algorithm. The Gaussian quadrature functionality provided in Numerical Differential Equation Analysis allows you to easily study some of the theory behind ordinary Gaussian quadrature which is a little less sophisticated. The basic idea behind Gaussian quadrature is to approximate the value if an integral as a linear combination of values of the integrand evaluated at specific points: Since there are 2n free parameters to be chosen (both the abscissas xi and the weights wi) and since both integration and the sum are linear operations, you can expect to be able to make the formula correct for all polynomials of degree less than about 2n. In addition to knowing what the optimal abscissas and weights are, it is often desirable to know how large the error in the approximation will be. This package allows you to answer both of these questions. GaussianQuadratureWeights[n,a,b] give a list of the pairs (xi, wi) to machine precision for quadrature on the interval a to b GaussianQuadratureError[n,f,a,b] give the error to machine precision GaussianQuadratureWeights[n,a,b,prec] give a list of the pairs (xi, wi) to precision prec GaussianQuadratureError[n,f,a,b,prec] give the error to precision prec Finding formulas for Gaussian quadrature. This gives the abscissas and weights for the five-point Gaussian quadrature formula on the interval (-3, 7). In[2]:= Out[2]= Here is the error in that formula. Unfortunately it involves the tenth derivative of f at an unknown point so you dont really know what the error itself is. In[3]:= Out[3]= You can see that the error decreases rapidly with the length of the interval. In[4]:= Out[4]= Newton-Cotes As one of its methods, the Mathematica function NIntegrate uses a fairly sophisticated Gauss-Kronrod based algorithm. Other types of quadrature formulas exist, each with their own advantages. For example, Gaussian quadrature uses values of the integrand at oddly spaced abscissas. If you want to integrate a function presented in tabular form at equally spaced abscissas, it wont work very well. An alternative is to use Newton-Cotes quadrature. The basic idea behind Newton-Cotes quadrature is to approximate the value of an integral as a linear combination of values of the integrand evaluated at equally spaced points: In addition, there is the question of whether or not to include the end points in the sum. If they are included, the quadrature formula is referred to as a closed formula. If not, it is an open formula. If the formula is open there is some ambiguity as to where the first abscissa is to be placed. The open formulas given in this package have the first abscissa one half step from the lower end point. Since there are n free parameters to be chosen (the weights) and since both integration and the sum are linear operations, you can expect to be able to make the formula correct for all polynomials of degree less than about n. In addition to knowing what the weights are, it is often desi

Alternative Fuel for Airplane Essay -- Energy, Sustainable Fuel

One of the most significant current discussions in sustainable aviation is alternative fuel for airplane, which is a serious argument; however, big question is that efforts to produce a more sustainable fuel to power aircraft are technically and ethically feasible. This paper going to investigate and show there is no alternative fuel to power aircraft in this time. The fuel using by airplane is fossil fuel, which is Jet A1 by burning this fuel there are impact on the global warming the researcher investigate what is the problem with fossil fuel (Jet A1). As solve the fuel problem there are several alternatives have tested, that some of them are biofuel, Liquid Hydrogen, Fracking for Natural Gas and scher-Tropsch (F-T) fuels from fossil feedstocks. However to fund out the alternative fuel is sustainable .firstly defined term sustainability. There are numerous definitions for the word sustainable. White (2001, p.1) states that sustainability seeks to provide the best outcomes for the human and natural environments both now and into the indefinite future. In addition, Thompson and Sorvig( 2009) in their recent research paper found probably the simplest, widely used definition of sustainability is meeting the needs of today's population with-out diminishing the ability of future populations to meet their needs. The other hand Fresco and Kroonenberg (1992) states that the sustainability of natural ecosystems defined as the dynamic balance between natural inputs and outputs, modified by external events such as climatic change and natural disasters. (Bell and Morse, 2008) the researcher from all research fund out that the sustainability related what is human put the nature has to be try to have balance ever aspect and impact to natu... ...ccessful in aviation industry such as biofuel, Liquid Hydrogen, Fracking for Natural Gas and scher-Tropsch (F-T) fuels from fossil feedstocks. All the fuel has been test and some of the, has been used for long time but the all of the have got impact on environment and social which make unsustainable fuel. At last with those fuels CO2 emissions is not increasing and LH2 approximately putting three times the amount of water in the atmosphere than burning kerosene-type aviation fuel, which is water washes out of the atmosphere a lot faster than carbon dioxide that stays up for years. Fracking presses the water containing the tracking chemicals left underground to fill the spaces in the fractured rocks and may eventually flow into the local ground-water system, making it unsafe for drinking. This research show there is no alternative fuel in this time and technology.

Reuniting the Grey Wolf :: science

Reuniting the Grey Wolf In 1914 the United States Congress approved the funding to destroy wolves. Many of the Government bounty hunters decided to help farmers to protect there livestock from the destructive creatures. Sixty years later the wolves are considered as endangered. In 1973 the United State Congress passed another law (Endangered Species Act) this act stated that all endangered species could not be killed by anyone or they would face a fine of one thousand dollars and as much as one year in jail. So many organizations started programs to help the wild life one of which was called the Wolf Recovery Program. The Wolf Recovery Program was set to help gray wolfs adapted back into there natural habitat. Since the program has been started they have introduced over 160 new wolves into the wild. But not everybody was in favor of reintroducing wolves into the wild. Today the United States Fish and Wild life Service have been considering the removal of the gray wolf from the endangered species list once I daho, Montana, and Wyoming raise enough wolves to be considered to continue to expand the wolf population, this requires that each of the three states have to have a management plan in effect to prevent the gray wolf from becoming endangered again. With the current attitude of the governments in these states federal support under the Endangered Species Act it would only serve to cause the wolves to become endangered once more, or at least, hold to absolute minimum of the population that the state scan pass off as a self-sustaining population. Many of the states like Idaho want to get rid of the gray wolves completely rid of in fact it has been said that â€Å"The State of Idaho is on the record asking the federal government to remove wolves from the state by the adoption in 2001 of House Joint Memorial No. 5. The position reflected in House Joint Memorial No. 5 continues to be the official position of the State of Idaho†. Now these are the problems facing the gray wolfs today . Farmers Many of the states legislature made room for the destruction of the gray wolf because they value the economies farming industries more than the preservation of wild life. The farmer aren’t helping with the restoration with many unsubstantial losses with no attempt to validate these statements. The settlers would let there cattle to roam off public property.

Nuclear Family

Yesterday, 22:02Â  in:Â  Essay samples The question is to outline and critically evaluate the functionalist view that the typical family unit is nuclear. The other part of the question is to critically evaluate the work of Willmott and Young that suggests that the family is becoming increasingly symmetrical. In defining the symmetrical family according to Willmott and Young, males and females are becoming equal within the family. Willmott and Young also stated that there are three stages in becoming a symmetrical family.The first stage is the pre-industrial family, which is a unit of production consisting of a husband, wife and unmarried children. The family worked for themselves on the land as a unit of production. This is still represented in a small minority of families today. The family started to decline in the nineteenth –century due to the industrial revolution which gave rise to the emergence of the factory system. (Haralambos and Holborn, 2002). The stage two famili es began with early industrialization.Factory production replaced the domestic system and such families ceased to be a unit of production and focused more on the individuals employed as wage earners. During the nineteenth century there was high unemployment and widespread poverty amongst the working class. Stage three families began in the early 1970’s. This is a new emerging family called the symmetrical family. It is egalitarian and democratic. The conjugal bond between husband and wife is strong and they share their work and time around the home. The nuclear family has become a large self-containing and self-reliant unit.Wives still have the main responsibility of raising the children with a little help from their husbands. Women started a network of support in order to help each other and their children during hard times. This extension of network was done to cope with poverty by creating an insurance policy and support. The bond between married daughter and mother became closer and the conjugal bond between husband and wife became weaker. A survey carried out by Willmott and Young in the 1950’s showed that stage two families still exists in Bethnal Green.There is still a strong bond between mothers and daughters. (Haralambos and Holborn, 2000) Historically the symmetrical family brought changes to the structure of the family. However, there are feminist theories on the family for example, radical feminists believe that that the family is a unit of oppression. Radical feminists see the home as a place where women were exploited by the capitalists and their husbands. Men were the head of the family and household. The men had political and economic powers allowing them to make decisions in the home. As a result the women would be dependent on the men.In order to understand the family, feminism has probably had more influence on the study of the family than any other approaches in society. Feminists have highlighted the dangerous effects on wome n within the family. Also the dominance of men within the family was highlighted. They also question whether the family life is becoming egalitarian. In addition, feminists view the family as an institution, which has greater benefits for men compared to those for women (Haralambos, 2000). In regards to the Marxist feminist perspective, Marxists such as Engel and Zaretsky recognised that women are treated unfairly in the home.However their focus is on the relationship between Capitalism and the family. Margaret Benston states that women are the emotional support for her husband. This support provides him with comfort, which enables him to continue to go out to perform well in his job. In terms this is good for the Capitalist employee working well in order to perform his role as a wage labourer (handout feminist perspectives on the family). According to Bryson (1997), radical feminists view the oppression of women as the most fundamental and universal from of control.In this view, th is is a patriarchal society rather than a Capitalist society in which women have different interests than men. Men are not seen as the source of male domination, although the feminists do see the family as important in keeping male power. Women are seen as exploited because of the housework and child care duties that she has to carry out unpaid. Men are seen as the ruling class and females as the subject in which patriarchal power control women’s sexual activity. Willmott (1970) argues that the way society is organised enabled men to dominate women.In the extreme from this can take the form of violence. As Dobash and Dobash (1980) indicates this violence from men is a real threat to many women and children. Liberal feminists views ague that women wanted equal rights. However they point on that changes in the political, economic and social system of western societies will be a gradual process. Liberal feminists see inequalities as affecting both males and females. They see wom en with potential in the workplace as not having the opportunity to progress. Liberal feminists are a strong advocate of equal opportunities for males and females.According to Haralambos and Holborn (2000) liberal feminists supported such measures as the Sex Discrimination Act (1975) and the Equality Act (1970) with the intention that these laws would help end discrimination. Critically evaluate the functionalist view that the nuclear family is both universal and typical. According to Murdock a functionalist who’s claimed that some kind of family existed in every society and was universal. His definition of the family states that ‘the family is a social group characterised by common residence, economic co-operation and reproduction.It includes adults of both sexes, at least two of whom maintain a socially approved sexual relationship and one or more children own or adopted of the sexually co-habiting adults’ (Haralambos, 2000) His idea of the universality of the family seems to focus on one type of family. However, the kind of family form that Murdock based his findings on when he did his research in 250 societies he found only nuclear families. This led him to the conclusion that the nuclear family was a universal social group. However, Murdock views of the family is somewhat flawed due to the different type of families that exist in today’s society.Murdock and Parsons have the view that women should be a t the home looking after and nurturing the children, while men should go out to work and are bread winners of the family. Murdock states that the nuclear family is universal and is based on three key functions for a family to survive in society. These are, it stabilizes sexual and reproductive functions. It also provides basic economic requirements such as food and shelter. Moreover it provides the function of socialization of the next generation into the norms, values and other aspects of culture in that society.Murdock argues tha t without these functions the nuclear family would not survive (Kirby, 1997) However the functionalist view that the nuclear family is both universal and typical can be contradictory. Murdock studied families in 250 societies and found that some kind of family existed in every society and was therefore universal. The types of family structure that Murdock found in all 250 families was the nuclear family which lead him to conclude that the nuclear family is a universal social grouping, (Handout the family) Parsons agrees with Murdock and goes on to say that the nuclear family is typical and normal.Parsons states that the female role is expressive. He makes distinction on the basic biology in that the female is more expressive because of giving birth to the child. Due to child birth the mother has a closer relationship with her baby. The female is a real carer and good at expressing her emotions and is natural in socialising children. The female is a role model for girls in the family . On the other hand the male role is instrumental. He is the breadwinner, provider, supporter of the family, a role model for male children in promoting achievement and giving motivation.There are biological factors that contribute to the difference between male and female in the family. However as Haralambos and Holborn suggested ‘there is no single blueprint for the family which applies to all societies’ (Haralambos and Holborn, 2000) Families vary in shapes and sizes and come in different forms such as the Nayar tribe, which is communal. There is the single parent, the same sex, contemporary and reconstituted family. Murdock and Parsons view of the nuclear family implies that women should be looking after the home and men as the provider and breadwinner.Murdock views can be contradictory because of the different types of families that led us to discuss the following families, which can be referred to as the exceptions to the rule of the universal existence. However, according to Gough the cross-cultural Nayar family perform qualities of the nuclear family in that there is a special and social recognised tie, which exists between a girl and the boy when she had her first sexual experience. The Nayar society of southern India performs as a nuclear family.Before puberty girls were ritually married to a Nayar man in the tali-rite. However after the tali-rite the female was free to take up several sexual partners as a result paternity was often uncertain. The only responsibility the women possess was to mourn at her husband’s funeral. Women would receive visiting ‘husbands’ after puberty as the men spend a lot of time away fighting. Husbands would visit other wives although the husband took preference when he was back home. The husband or wife would end the marriage any time.Other women share in the caring of the children and the fatherhood of the child was not important because of its matrilineal society. The economical contribu tion of males was minimal towards their children. Brothers and sisters of both parents side contributed to the economics and bringing up of the children (O’Donnell, 1985) the functionalist views regarding children’s need for social and stability works well in the Nayar society (O’ Donnell, 1985) Murdock’s view on the universality of the family is too narrow because it excludes many family forms.For example the single parent family is a distinct and viable family type as O’ Donnell states one in five families with dependant children in Britain in 1994 was headed by a single parent. Single parent family is the most common in western society (Bourne, 1995) states that in 1996 11 per sent of people in Britain lived in this type of family. Today it has doubled. However, there are professional women who choose to be single parents as studied by Jean Renvoizes single mother by choice (1985).She examined 30 mothers of this type who could afford to raise a child single-handed. On the other hand the Cashmore Study this showed that non-professional single parents were poorer and some of these women found being single was better than being in an oppressive relationship. Then there is the same sex family ‘as Plummer (1976) argued that homosexual are less likely to establish long-term relationships. Legally homosexuals cannot marry but there are changes in the law that may allow this group to foster or adopt children.There is not enough evidence to support the notion that same-sex relationships are more dysfunctional than heterosexual families. Kirby states (1997) lesbian mothers maybe seen as unfit to nurture children. Then there are mothers who leave heterosexual relationships and enter lesbian relationships- are these women seen as unfit mothers (Kirby, 1997) The contributing family is one in which couples live together with their children for a period of time, before getting married.As Mc Rae (1993) shows many of these couples ma y never marry. Evidence shows that this type of family is less of a problem for themselves or society as a whole, than single mothers, who have been divorced or never married and live without a partner (Kirby, 1997) The reconstituted family is when there are previously married and divorced people with children coming together and getting married who form a new family. Many children are being brought up in this type of family.Many children are being brought up in this type of family of step-parents and step siblings. The extended family is still present in the 21st century. As study conducted by Willmott and Young in the borough of Green in the East End of London such families had intertwined in their lifestyle. The children and parents live in the same area as parents for three or more generations. This family helps and maintains links with each other. Also the mother housewife role is shared by the female members f the extended family (Haralambos and Holborn, 1996) The Neo-Conventi onal family are family of past divorces coming together and re-marrying to form a new family with children from previous marriages as stated by Chester Kirby (1985) There are alternatives styles of family such as the Kibbutz in Israel. Haralambos and Holborn state there are 3 per cent of the population that live in about 270 Kibbutz. These sizes vary from 100-2000 members and it consists of an agricultural lifestyle with some light industry.Children spend most of the day and all the night away from their parents in the children houses. They are educated and socialised by trained staff. Parents do visit their children and spend time together as a family, which keep the strong bond within the family. This bonding meets the children’s emotional needs, whereas the Kibbutz provides for children’s physical needs. (Haralambos and Holborn, 2000) From the post-modern perspectives of the family this views the modern alternatives to the family.This view is saying that in contempo rary society there is a wide diversity of family forms all equally valid, which provide the function of the modern family (Kirby, 1997) In conclusion, according to Murdock and Parson this nuclear family is universal and typical. However this is contradictory because from my research there are a vast variety of family forms that are all existing and functioning, such as the single parent family, Kibbutzim, co-habiting, same sex and reconstitutional.As in the case of the lone parent family it could be argued that the family in industrial society has lost many of its functions. Many of these functions are taken over by the state in the form of specialised organisations for example the social security agency, schools and hospitals. (Haralambos and Holborn, 1983) The extended family still exist in some developing countries today and carry out the duties as the nuclear family. The post-modern view of the family fits in with modern contemporary society.The feminist view highlights the oppr ession of women within the family and changes that has come about. Even though there are differences in the family forms we have to celebrate all types of families. From the nursing profession it is important not to be judgemental towards people and to learn to accept that there are a wide range of families and groups of people in the contemporary society. This post originally appeared on http://www. customwritings. com/blog/sample-essays/essay-family. html