Health epidemiology & statistics Essay Example | Topics and Well Written Essays - 500 words - 3

Wellbeing the study of disease transmission and measurements - Essay Example It results from the Hepatitis C infection or the HCV. In spite of the fact that the contamination is typically asymptomatic, its incessant stage is portrayed by a scarred liver and the ensuing improvement of liver cirrhosis. This happens after numerous years (Butt et al., 2010). A portion of the key techniques through which it is spread incorporate blood-to-blood contact that may result from poor cleansing of clinical hardware, intravenous utilization of medications and transfusions. Around 150 to 200 million individuals are tainted with Hepatitis C everywhere throughout the world. It is known to taint just individuals and chimpanzees. The infection is relentless in the liver of 85% of the individuals who have been contaminated. Despite the fact that there is no resistance against the malady, it very well may be dealt with and relieved. Be that as it may, there is as yet a high and expanding bleakness, co-morbidities, and mortality of the ailment (Sweeting, De Angelis, Ades, and Hickman, 2009). The fundamental factors that are related with this are individuals, spot and time, which structure a huge piece of the transmission instrument. According to the individuals, there must be a powerless host, who must have the essential states of host resistances to empower illness counteraction. There is likewise a significant part of spot, which alludes to the accessibility of a favorable site for the microbial operator to follow, enter and contaminate in this manner causing the sickness inside the vulnerable host. As far as time, the regular settings give a good situation to the specialist to increase and make due inside the repository (Panduro et al., 2010). APN influences the essential, optional, and tertiary mediations of hepatitis C as in it gives both individual and populace avoidance techniques. Various methodologies can be applied in the directing, screening and helpful techniques. Butt, S., Idrees, M., Akbar, H., ur Rehman, I., Awan, Z.,

Psychological factors

Games Psychological components Prepared by: Mohamed Diab Computer games are famous in light of the fact that they influence us inwardly, along these lines to movies and music. Similarly as a blood and gore flick causes you to feel terrified, an endurance frightfulness PC game can panic you as well. Somehow or another the game causes it to feel all the more genuine on the grounds that you are controlling the character, so what befalls the character can feel like it is transpiring. Games architects utilize the mental elements to improve their games and make the experience of playing them more memorable.It can be one essentially and quietly, or it tends to be done in an exceptionally evident manner, contingent upon the requirements of the game. Utilization of Sound can cause you to feel heaps of various things †it can cause you to feel glad, pitiful, terrified, courageous. There is anything but a solitary human feeling that hasn't been spoken to in music or audio cues eventually in our history. Games architects utilize this furthering their potential benefit and there will be a sound creator whose job is to pick the audio cues and melodic scores that are utilized all through a game. Shrill, quick paced music or audio cues will in general cause you to feel progressively energized and as though you are in the ction.Platform games and dashing games utilize these highlights to add to the game's fervor and pace. Page 2 of 10 Horror games use string instruments, for example, violins and the sound of squeaking sections of flooring to cause individuals to feel tense similarly that a blood and gore film does. High Score Listings anybody with the exception of the PC. Indeed, even multiplayer games were generally restricted to two individuals. Single-player games today are regularly determined by the storyline and the player will keep playing as far as possible so as to discover what occurs. In progressively fundamental games, be that as it may, this isn't the case.The high score table or rundown turns into the otivation to play over and over. On the off chance that you feel constrained to improve your high score, at that point you will continue playing the game until you succeed and this implies you will get increasingly game-play for your cash. A high score list is an option in contrast to the storyline as a spark for playing a game more than once. Some ongoing games, particularly sporting events and easygoing games, despite everything incorporate high score records and you regularly have the choice to distribute your score on line through the game so you can contrast yours with those of individuals over the world.In numerous FPS (first individual shooter) games that ave online multiplayer settings, you can have a world positioning which gives you how well you are getting along likewise to a high score list. Page 3 of 10 Competitive Games Competition with others is a driving element that makes individuals attempt to improve their aptitudes and c apacities. High score records will urge you to contend with yourself, however serious games where you play against others will make you much increasingly inspired to improve. Since our commencement there are instances of individuals going up against one another so as to demonstrate that they are the best at something.The most wellknown model is he Olympic Games, where individuals meet up from each nation on the planet to contend, and the occasion produces a ton of worldwide altruism and fervor. Unavoidably there are events when individuals become over-serious and the longing to win turns into a negative as opposed to positive inspiration. In general, in any case, rivalry instructs individuals to be acceptable failures, to propel themselves and to examine their aptitudes and detail intends to improve those skills.These are for the most part positive characteristics that make an individual effective in the realm of work and are verifiably connected with being fruitful at PC games. Pag e 4 of 10 Since online multiplayer games have become standard, individuals have delighted in playing a scope of various games against companions or outsiders. A portion of the consoles that are focused on more youthful kids, for example, the Nintendo† Wii or DS, limit online play to the individuals who are known to the player in everyday life instead of acquainting them with individuals through the game that they have never met up close and personal.

First Year Application Reminders - UGA Undergraduate Admissions

First Year Application Reminders - UGA Undergraduate Admissions First Year Application Reminders The January 15 Regular Decision deadline is quickly approaching. This is a busy time in our office as we are receiving thousands of documents, both online and in the mail. Here are a few suggestions for you as the deadline nears: Do not wait until the deadline to do things. If you wait until the very last minute to apply, you are putting yourself in a position with no room for error. We will leave the application open through January 15.The online payment option is only available until 9:30PM EST, however you will still be able to choose a mail payment option after 9:30. It is better to apply prior to sending in supplemental material (with the exception of SAT/ACT scores). An admissions file is not started for you until we receive your application. It will take longer for us to match your material if you submit something before you apply. When we receive material and there is no admissions application, that document is added to a holding file. On the other hand, when you submit something after you have applied, it is added directly to your admissions file. Please be patient. It can take up to 5 to 10 business days for something to be added to your file once we have received it. Right before and after application deadlines, our incoming mail greatly increases which can slow things down a bit. If something is not showing as received on your myStatus, first check with the person who sent it (teacher, counselor, etc.) to verify that it was sent. Before you call or email us, make sure you have given us enough time to receive and match the document to your file. Business days do not include weekends and holidays. Make sure the name on your teacher recommendation/high school evaluation/transcript/test scores matches the name on your application. This is the primary reason something will not be matched with your file. If you know you sent SAT/ACT scores (and you have verified that they have been sent to UGA from College Board/ACT), please double-check to see that the name, social and date of birth on your exam matches what you listed on your application. If you know your teacher or counselor has sent in their form and after 10 business days it is not in your file, be sure to double-check and make sure the individual who sent it listed your name correctly. If you find that there is adiscrepancyin how your name, date of birth, etc. is listed, please let us know. We will accept any SAT/ACT that is taken in January for Regular Decision. You must designate UGA as anautomaticrecipient for your scores when registering for the exam in order for us to receive them in time. While the deadline is January 15, we will be accepting supplemental documents for a couple of weeks after this date as we know that some schools, counselors and teachers are overwhelmed at this time of year. That does not mean that you should wait to have things sent in, but that we will try to work with schools on documents. If a school evaluation is submitted online through our system, it will show up in 1 to 2 business days as it goes straight into a students file. If a teacher recommendation is submitted online through our system using the link from the email students can generate from the myStatus, it will also show up in 1 to 2 business days. If you send a fax, it will be shredded. We do not accept faxed documents, so please do not send them. Be sure to check your myStatus regularly to see if we have received your admissions material and remember to give us 5 to 10 business days to match material once it has been sent. We appreciate your patience as we work as quickly as possible to match the thousands of documents we are receiving with applicant files. Go Dawgs!

The Culture Of The Middle East - 1476 Words

It is noted that every Middle Eastern Country are publicly fascinated of the Dabke dance. Each of the Middle Eastern nation claims they are the best at dancing Dabke. They also claim to have to have invented the dance (Hussein, 2016). However, there is the truth and reality behind the dance. Dabke is also referred to as Dabka or even Dabkeh. It is those names that the Middle Eastern people refer to the actual dance that is normally used by different dialect. The dance is universal irrespective of someone’s roots and cultural background. Whether one comes from Iraq, Lebanon, or even Palestine, the dance is still the same. The term Dabka basically means the act of stomping (Haugbolle, 2010). The dance found its inception back in the early 1990s before the segmentation of the Middle East took place. The Middle East was segmented through the colonization process. The colonies were either the French or the British. The Middle East was a single peaceful land that had a common Dabke art. The Dabke art was widely used in celebrations, joyful events, at the weddings, at the graduation, and also in birthdays. Therefore, Dabke was well known to be a tradition that was shared. Meaning the tradition was not owned by anybody and it originated in the Middle East intended for everyone to celebrate. The Dabke dance was a Levantine folk dance. Meaning it found its inception from the Middle East Region. Some of the Middle East Region where the dance originated include; Syria-Jordan,Show MoreRelatedCulture Of The Middle East4300 Words   |  18 PagesIntroduction I explored the culture of the Middle East because I find it very interesting and different from my own. I feel as if many people hold a strong negative feeling against people from the Middle East because of terrorist attacks in the past. Middle Eastern culture is different from American culture and some people are not culturally aware so they do not understand Middle Eastern culture, therefore, people judge off of what they know. After visiting and researching the Middle East I have came to changeRead MoreEast Asian Films And Its Impact On The Middle Asian Cultures1076 Words   |  5 PagesEast Asian films offered a glimpse into a world I had never seen; a world that appeared different from my own background, but nevertheless intrigued me. A simple anime show led to the discovery of Korean dramas, and resulted in the culmination of a Korean minor five years later. Although I lacked the financial resources to actually travel, film served as my first exposure to different East Asian cultures. I would be remiss if now, as a student at Georgetown University, I did not take the opportunityRead MoreEssay about Islam: The Rich Culture of the Middle East936 Words   |  4 Pageswhat sect he belongs to. Besides the Qur’an, Muslims also study the hadith, which are the records of the customs of the Prophet (Muhammad.) It is not held as highly as the Qur’an, and isn’t a holy book, but is another way that Muslims unify their culture. The three different sects of Islam are the Sunni, the Shi’a and the Sufi. There are other denominations, but these are the main ones. They all have similar beliefs, but vary in theological and legal areas. 85 percent of all Muslims are Sunni,Read MoreThe Middle East On Social Media804 Words   |  4 Pagesgrown on one another. When one would talk about the middle east on social media the first thing that comes to mind is the war and countless bloodshed that spilled and the impact it had on many lives. All the stories distributed by social media display attacks and war in the middle east, portray all middle easterners to be muslim, and only tell the tale of terrorists to the public. Social media is only showing people, very little stories about Middle Easterners. One of those shameful stories is theRead MoreGlobalization And The Middle East998 Words   |  4 Pagesdecline and rise of these countries commercial economy are closely related to their political culture. Therefore, it attracted the attention of scholars and research circles. Through reading the case: â€Å"Globalization and the Middle East† in John S. Hill’s book, International Business: Managing globalization, PP.124 to 132. Have had a further understanding of the political and religious culture of the Middle East countries, and have had a research for the following questions also written down my own opinionsRead MoreWestern Culture And Policies That Have Shaped The Modern World1523 Words   |  7 PagesWestern culture and policies have shaped the modern world, especially the Middle East, in many ways. Since the sixteenth century, the nations of Western civilization have been the driving wheels of modernization. Globalization is simply the spread of modern institutions and ideas from one high power to the wider world. Technological innovation and economic growth along with such concepts as democracy, individualism, and the rule of law administered by an impartial judiciary, set Western societiesRead MoreEssay on Mtv Arabia1329 Words   |   6 Pagesour brands depending on the local cultures. Now, another challenge for MTV has arise, Middle East region is the next target for MTV global expansion. Issue: MTV Network (MTVN) launched MTV Arabia on November 17, 2007. It is a partnership between Arabian Television Network (ATN) and MTV Network as an effort of its global expansion strategy. This is considered a really huge market. There are mainly three issues preventing a successful expansion to Middle East region. First is the extreme culturalRead MoreTradition And Heritage Of The Middle East1278 Words   |  6 PagesTradition and heritage culture has been and remains prevalent throughout the Middle East. Two of those traditions or heritage cultures includes kinship and tribal affiliation. The two go hand and hand and is seen throughout a wide spread of the modern Middle East. As Americans, or any allies of the Middle East, it is important to understand the tribal system in order to interact with the Middle East. The purpose tribes serve in the modern Middle East is protection. This protection comes in many formsRead MoreEssay Understanding Islamic Religion and Culture1221 Words    |  5 PagesWhat is your view on the Islamic religion and culture? Did you know they are the fastest growing religion in the world today, with eighty-percent now developing outside the Arab world(Belt, Don) Today’s generation does not show much interest or knowledge of their own religion; let alone the Islamic people. Most people only expose themselves to information that matches their own opinions and beliefs. Instead of learning and exploring new things about the world they stick to what they know becauseRead MoreWomen And The Middle East And North Africa1148 Words   |  5 PagesThe diversities within North Africa, the Middle East, and Southeast Asia (cultural, religious, political, etc.) play a crucial part in the status of women and the key features of gender roles in these particular geographic regions. The Middle East and North Africa share commonalities through Arabic and Islamic culture. Establishing equalities for women amongst the current social and political c hanges of Middle Eastern and North African societies stands as a difficult obstacle to overcome, but in

High Intensity Training Versus Traditional Exercise...

As a general guideline, a review paper equivalent to a 20 minute oral presentation might be 5-10 pages and include 10 or more references. Shorter papers and fewer references would be appropriate if there is greater critical analysis of the subject area. Literature review: High-intensity training versus traditional exercise interventions for promoting healthï ¼Å½ Emerging research examining high-intensity intermittent training (HIIT) indicates that it may be more effective at reducing subcutaneous and abdominal body fat than other types of exercise. In addition, it may promote health in various ways. I will focus on the comparison of HIIT and traditional exercise on the exercise performance, fat loss, fitness, insulin resistance, etc. Possible mechanisms underlying HIIT-induced fat loss and implications for the use of HIIT in the treatment and prevention of obesity are also discussed. High-Intensity Interval Training versus Traditional Exercise Interventions for Promoting Health Abstract: Keywords: 1. Introduction: High-intensity interval training (HIIT) as a compromise between time-consuming moderate-intensity training and sprint-interval training requiring all-out efforts, is emerging as a potential time efficient strategy for health promotion. Current recommended guidelines of 150 minutes of moderate physical activity per week is reduced by half to 75 minutes if the week’s activity is done at a vigorous intensity (ACSM, 2014). HIIT, when compared to Traditional Exercise

Ideas, Formulas and Shortcuts for Evaluation Essay Topics for College

Ideas, Formulas and Shortcuts for Evaluation Essay Topics for College Teachers play an essential role for imparting the wisdom and skills just to make certain the students success. Explain your commitments, and you are going to be the type of student colleges find immensely attractive. They are looking for a sense of maturity and introspectionpinpoint the transformation and demonstrate your personal growth. They are more likely to admit students who can articulate specific reasons why the school is a good fit for them beyond its reputation or ranking on any list. Whether you would like to order an instance of an evaluation essay, get access to some other collection of excellent topics, buy an outline to enhance your odds of successfully completing an assignment in time or employ a skilled proofreader to confirm your paper, you may always rely on us. There are different sorts of evaluation essays and you ought to bear in mind that every one of them have differences based on the goal of their creation. An evaluation essay can help you find out about the caliber of an object you want to know more about. Reviewing sample essays might be excellent model to help you recognize how to present information. An argumentative paper is part of the persuasion. If you wish to make an evaluation essay, you ought to be strategic when it has to do with the presentation of information that could be useful in the writing activity. Evaluation papers provide value judgments related to several subjects. Presenting The Research Paper Research papers should be presented well to make the correct impact. Evaluation Essay Topics for College Options An individual Cannot Censor the Information on the internet. The topic also needs to be the one which provides the students sufficient to write on. The Unexpected Truth About Evaluation Essay Topics for College You may continue to keep your argumentative essays for your upcoming job portfolio in case they're highly graded. T he government is made to protect certain businesses that are in danger of submitting for bankruptcy. It's needless to mention our company doesn't accept plagiarism in any form. When structuring your essay, it's usual for each paragraph to address a different criterion. You also ought to establish criteria in the start of an essay. There are 3 things one must have as a way to form a superior evaluation essay. Before you commence writing the very first draft, you ought to consider superior evaluation essay topics and pick the side which you will take. If you've got clear criteria, it will become possible to continue to keep your evaluation from being just your own personal opinion. Evaluate either side of the chosen subject to stop from producing your evaluation essay sound biased. It is very important to establish it since it won't make your evaluation look to be an opinion. If that's the case, your evaluation is going to be a beaten job. A Secret Weapon for Evaluation E ssay Topics for College Otherwise, then the very first point to know is that you ought to start by viewing a range of topics before choosing one that's suitable. Write carefully, so that someone else on the lookout for help with the very same thing could choose whether to hire that person. If you are fighting to produce an innovative subject, then you are able to use one of our suggestions. Attempt to create your task easier by picking a subject of interest. If topics for evaluation essay are unavailable, then the writer is totally free to choose any topic of their own interest. Evaluation essays work best in the event the readers can determine the sources you've used to think of the assessment that they're currently reading. If you're writing an evaluation essay, you should remain objective with the content which you are presenting. Despite the fact that writing an evaluation essay is a difficult undertaking, you shouldn't give up due to the obstacles on your way. In ord er to be noticed, it's important to understand that there are numerous essay topics which are cliche and overused. So, the choice of the topic is most important. Make certain you give clear explanations of the things on your list also. If you've completed any quantity of research, you are going to know considerably more about a topic than you may conceivably include in a five or ten page essay. It is crucial to remember an essay isn't only your opinion. You're able to finish your essay in several ways. Before it's possible to select a compelling essay topic, you first have to know why there's an essay in the very first spot. Recent argumentative essay topics that are related to society is going to do. To prevent common essay mistakes, a number of the things which you should always remind yourself when writing an evaluation essay are given below. Depending on the sort of essay, it might additionally have a summary which provides a brief of everything that's covered in the essay. When you use a quotation, be certain that you cite the quote so that you don't have issues with plagiarism. At times the procedure for choosing evaluative essay topics becomes a true challenge. The Battle Over Evaluation Essay Topics for College and How to Win It Since an evaluation essay isn't only part of college essay examples as it may also be utilised in company and company processes, you must understand the weight of its effectiveness. Bear in mind you have to do research and outline both the advantages and disadvantages. The following are a few ideas that might help with your problem solution essays. The Foolproof Evaluation Essay Topics for College Strategy There are particular actions whi ch should be taken to compose an ideal evaluation essay. Don't forget that if writing an evaluation essay, you don't need to express a firm opinion and stick with it, yet to create a balanced assessment presenting different facets. It is going to also be easier that you produce an evaluation that could be trusted by your readers. Your teacher has probably already given some instructions, so make sure to test them out, particularly if you don't know just how to write an essential evaluation essay. The criteria that you select should establish what the ideal is for the item, service or brand that you're evaluating. When choosing a topic for an evaluation essay, it's important to center on a particular company, service, product or policy. While evaluation essays are not hard to write, as you're simply required to evaluate a product, service, entity, event or something different, there is a single important trap to be on the lookout for creating your piece overly opinionated. Th e evaluation essay is intended to demonstrate the total quality of a specific object, service, product, and place.

Native Americans and Colonization Essay Example For Students

Native Americans and Colonization Essay Native Americans had inherited the land now called America and eventually their lives were destroyed due to European Colonization. When the Europeans arrived and settled, they changed the Native American way of life for the worst. These changes were caused by a number of factors including disease, loss of land, attempts to export religion, and laws, which violated Native American culture. Native Americans never came in contact with diseases that developed in the Old World because they were separated from Asia, Africa, and Europe when ocean levels rose following the end of the last Ice Age. Diseases like smallpox, measles, pneumonia, influenza, and malaria were unknown to the Native Americans until the Europeans brought these diseases over time to them. This triggered the largest population decline in all recorded history. Fifty percent of the Native American population had died of disease within twenty years. Soon after, Native Americans began to question their religion and doubted the ability of shamen to heal. This was the first step towards the destruction of Native cultures. The Native Americans had never experienced anything like these deadly diseases before and they came to believe that Europeans had the power to kill or give life. Many Native groups, because they were nomadic, didnt see land as belonging to one person. The idea that someone could come in, claim a piece of land and ban them from it, caused many problems. They could no longer hunt or forage for food in places they had always done so. Fights over territories began to break out and groups who always had plenty of food, now barely had enough. Many Christian missionaries tried to force Native American people to abandon traditional religious beliefs and practices (Mayo, 33). Christian missionaries would sometimes launch attacks on Native American religious institutions when forcing them to convert to Christianity did not work. These harmful attacks destroyed not only their temples and religious artifacts, but also a huge part of their culture. Laws were introduced that protected the land and property the colonists had acquired, banned most of their religious ceremonies, and forced the children into the European educational system. The Europeans wante d to deny the Native Americans of their cultural identity, which eventually would end up wiping them out. Native Americans were deeply effected by colonization. It was extremely unfair of the Europeans to destroy Native American way of life. If the Native Americans had the weapons, like guns and disease, that the Europeans did, then maybe they could have fought for what was theirs. Europeans came to America and changed the Native Americans lives forever. This contact between the Native Americans and Europeans was called the Columbian Exchange. While both Native Americans and Europeans received advantages and disadvantages from the Columbian Exchange, Native Americans definitely suffered more while the Europeans were benefited more. It is not right that the Native Americans lived on American land all their lives and had the land as well as their culture taken away from them in a matter of only a few years. Mayo, Louise A. American Dreams and Reality: A Retelling of the American Story, Volume 1 Second Edition. Illinois: Abigail Press, 2000. Words/ Pages : 541 / 24

Brand New Concert free essay sample

To promote their new album, â€Å"Daisy,† alternative rock band Brand New embarked on a U.S. tour for six months. Every time Brand New comes to town, fans anticipate a promising experience. Whether frontman Jesse Lacey plays â€Å"Degausser† twice halfway through the set and storms off early or plays old favorites in an encore, something intriguing and unexpected is bound to occur. So after being shoved around for 30 minutes in an annoying crowd, I finally made my way near the front as Brand New was about to begin. They started with â€Å"You Wont Know,† a song that comes in softly, then hits the chorus hard with energy. The fans surrounding me were singing so loudly that I could hardly hear Lacey. Despite the solid sound, the band didnt seem too into it, which isnt unusual, as their emotions really tend to come out in more recent songs. The first number they played off â€Å"Daisy† was â€Å"Vices,† their most aggressive song. We will write a custom essay sample on Brand New Concert or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page I was sure Lacey would go bonkers! But the band looked almost bored, which perplexed me. When they finished their set and exited the stage, the lights came on immediately before the crowd could even think to chant â€Å"One more song!† Is this it? No encore? No emotion? I hate to say it, but I wished that Lacey had been miserable. At least then we would have witnessed some raw emotion or maybe even seen him throw his guitar at the drum set as he has in the past. I wondered if he was too happy to let his melancholy songs affect him. This was not the Jesse Lacey that fans have come to know. I was hoping to have something to talk about with my friends who missed the show. But now, all I can say is that they played and performed well – good for a music fan, but disappointing for a longtime Brand New fan.

Free Essays on American Exceptionalism In The New World

American’s as a whole would like to think that the United States is the greatest nation on the planet, and for the most part we do. It has been driven into our heads, seen on television and cheered at sporting events. Whether or not this assumption is true, it is easy understood that Americans have an egotistical mindset as a whole. This â€Å"mindset† is often referred to as American Exceptionalism and its roots can be drawn from as far away as Europe and chronologically dates back to our nation’s birth. During the seventeenth century Europe was becoming a difficult and unattractive place to live for many of its inhabitants. Overcrowding of major cities, disease, and tyrannical rule allowed Europeans to dream of a better life, a life which would allow them to follow their religion and apply themselves for their own good and prosperity. Europe’s social order was the major concern for those looking to further themselves. Two groups usually formed Europe’s social order, this being the rich and poor. As the saying goes â€Å"the rich get richer and the poor get poorer†, leaving false hopes for those born in to a poverty stricken community. The law of the land was actually the law of the church leaving no separation between church and state, or government. Although this may sound quite confining for today’s citizens it was the norm not only in Europe but all over the world. As is human nature many non conformists were looking for something better, a place where they could attain a pure civilization removed from corruption and deception. A community where people were treated equally, could practice any religion, and further themselves with hard work and dedication. A new form of government was also a major concern to deserters of Europe. They no longer wanted a single monarch to control all aspects of their day to day lives. The idea of democratic rule had been brought forward by Montesquie, and was gaining popularity and under... Free Essays on American Exceptionalism In The New World Free Essays on American Exceptionalism In The New World American’s as a whole would like to think that the United States is the greatest nation on the planet, and for the most part we do. It has been driven into our heads, seen on television and cheered at sporting events. Whether or not this assumption is true, it is easy understood that Americans have an egotistical mindset as a whole. This â€Å"mindset† is often referred to as American Exceptionalism and its roots can be drawn from as far away as Europe and chronologically dates back to our nation’s birth. During the seventeenth century Europe was becoming a difficult and unattractive place to live for many of its inhabitants. Overcrowding of major cities, disease, and tyrannical rule allowed Europeans to dream of a better life, a life which would allow them to follow their religion and apply themselves for their own good and prosperity. Europe’s social order was the major concern for those looking to further themselves. Two groups usually formed Europe’s social order, this being the rich and poor. As the saying goes â€Å"the rich get richer and the poor get poorer†, leaving false hopes for those born in to a poverty stricken community. The law of the land was actually the law of the church leaving no separation between church and state, or government. Although this may sound quite confining for today’s citizens it was the norm not only in Europe but all over the world. As is human nature many non conformists were looking for something better, a place where they could attain a pure civilization removed from corruption and deception. A community where people were treated equally, could practice any religion, and further themselves with hard work and dedication. A new form of government was also a major concern to deserters of Europe. They no longer wanted a single monarch to control all aspects of their day to day lives. The idea of democratic rule had been brought forward by Montesquie, and was gaining popularity and under...

Organisation Development-Academic Review Research Proposal

Organisation Development-Academic Review - Research Proposal Example Since, the concept has a origin long back it is sure that we can expect a great among its practitioners in the present world, and more over all those who are working in the filed of organizational development are closely related to the business sector but, due to the enormous development in the filed of information and communication the business sector in the present world irrespective of the type of business they are undertaking has taken a new dimensions when compared to the earlier periods. OD is closely inter linked with the organizations which are involved in any business in one way or the other, so it can be clearly noted that the way it was practiced in the earlier periods will not be worth while in the present stage. Identification of a problem is the main factor, which decides the results of any research, whether it is an action research or any other explorative research studies. Since, conducting any research without identifying the correct problem is like searching an answer without a question. Hence, problem identification should be given prior importance before designing any research. In general in every research work after identifying the problem the next main concern is to verify whether the identified population which will constitute the respondents has any relation with the identified problem so as to confirm whether the research will give a acceptable inferences whether a positive or negative, which in turn will pay way to further researches or it will help any decision making issues. In this research the identified problem can be stated as the "Assessment of the Organizational Development" which can be accepted as researchable topic. Since, in general any research will be conducted to identify or study any serious problems or issues or situations. In this context though assessing the filed of organization cannot be considered as a serious problem it can be considered as one of the serious issues the world is facing as today's world depends on the business sector for all their needs it is very important that the organization or the management running any business should be more effective. So assessing the organization development in particularly to find its strength, weakness, opportunities and the threats will surely pave to the improve in the practices which in turn will help in the better management of the organizations. Considering the all above said factors we can come to a conclusion that at this juncture the authors selection of research problem is notable. Literature Review: After identifying the population and problem among them, which is, going to be considered for research the second major thing is conduct the review of literature. Literature review is considered as such an important part of any research since this section of the research is the one which helps researcher to finalize the research design without any replication and with some improvements in the selected field. In the present article though we were not able to see the details about the reviewed literatures we can find that as it is stated in the methodology section that more than eighty recent literatures related to business challenges and opportunities were reviewed. We hope that all of them will be of great use in designing the other SWOT analysis section. Research

Value Engineering Essay Example | Topics and Well Written Essays - 2750 words

Value Engineering - Essay Example Tremendous benefits are obtained from value engineering. Benefits are derived comes from the start of the planning, design and the actual construction. There is a great potential of verification if the budget is adequate for the developed program. Value engineering (VE) is defined as "systematic effort that is directed in the analysis of the functional requirements of procedures, systems, equipment, facilities, and supplies for the purpose of achieving the essential function at the lowest total (life cycle) cost consistent with meeting the needed performance, quality, reliability, maintainability, aesthetics, safety and fire resistance" (Kavanagh, 1978). The implementation of value engineering includes the six steps which are (1)information,(2)functional analysis, (3)creative, (4)evaluation,(5) planning/proposal and (6) implementation/follow up (Snodgrass and Kasi, 1986). In the creative step, brainstorming session is involved. Life cycle cost alternatives for the design components are considered. Value engineering and constructability are two different ways in terms of criteria discussed. However, this does not mean that they are exclusively mutual. Activities within the two processes complement each other in the achievement of their goals. This results in construction optimization, at the same time, achieving lowest life-cycle cost. For example, value engineering would recognize the increased benefit from the early implementation (O'Brian 1976). In the recent years, the use of total quality management (TQM) has spread from the manufacturing industry to construction. Organizations using TQM are adopting a management philosophy that makes quality a strategic objective for the organization.("Total Quality Management: The Competitive Edge" 1990). The successful application of TQM for contractor and owner organization in Japan, as well as some others in the U.S, and the UK, have increased in the recognition as an effective method to improve quality and productivity. Customer satisfaction and continuous improvement are the two principal objectives of TQM (Burati, 1992). In the construction industry, the parties involved in the project, including the owner, the contractor, and the designer, play the role of customer and supplier of services. The owner supplies the requirements to the designer, then the designer supplies the plans and specifications to the contactor, then the contractor supplies the finished building to the owner ( Juran, 1988). The corporate constructability program(CCP) includes the costs to start-up and maintain a corporate constructability program. The cost elements are written program procedures, computer software and hardware that contain the lessons-learned database, the constructability analysis tools and the corporate constructability coordinator (Russell and Gugel 1993). The estimated quantitative benefit for each major constructability idea may be totalled for each project and compared to the costs of constructability. This cost/benefit ratio could be a measure of the effectiveness and /or the maturity of the constructabil

Beam Adaptive Algorithms For Smart Antennas Computer Science Essay

Beam Adaptive Algorithms For Smart Antennas Computer Science Essay Smart antennas employed in space division multiple access systems can cater the high demand in terms of capacity in mobile applications without further increase in radio frequency spectrum allocation. Furthermore, smart antennas provide better quality of service (QoS) and better coverage. Therefore, beam adaptive algorithms used in smart antenna systems are of great interests. 1.2 Project Aims The project aim is to study and understand the adaptive algorithms for beamforming for Smart Antenna Systems and to develop research skills, by reading research papers and journal papers related to the topic. Moreover, to produce the technical draft that contains the analysis, results and discussion of several adaptive algorithms employed in Smart Antenna Systems. The research work conducted and a simulation will provide the better understanding of the subject and can be a possible contribution to the existing work. 1.3 Project Objectives The project objective is to attempt systematic comparison of the performance of different Adaptive Algorithms for beamforming for Smart Antenna System. The algorithms that will be under investigation in this project will be training sequence algorithms like Recursive Least Squares (RLS) and Least Mean Squares (LMS), and Constant Modulus Algorithm (CMA). Simulations will be done to find out which algorithms are best for beamforming i.e. to form main lobes towards desired user and for convergence rate. The comparison of algorithms will be made on the basis of formation of main lobe and the convergence rate. The effect of jammers in algorithms will also be studied. 1.4 Project Outcomes The outcome of the project is come up with simulation software that will calculate the parameters of Smart Antenna and tell us which algorithm performs better in a particular situation. Moreover to prepare a research report that contains critical analysis different beam adaptive algorithms. 1.5 Structure of the report The first chapter of the final report is the Introduction which describes the motivation for research, project aims and objectives. The second chapter is the Literature review. The overview of recent work conducted in this domain and the brief summary of several research papers studied for conducting this research has been presented. Reading list is appended in the references section. Third chapter is the introduction to antennas and smart antennas. The fundamentals parameters of antennas and smart antennas are briefly described. Fourth chapter is on smart antenna system. Types of smart antennas and their comparison are done in detail. In fifth chapter description about the signal processing algorithms is presented. Lastly given are the results and conclusion. Chapter 2: Literature Review Smart antenna is the most efficient leading innovation for maximum capacity and improved quality and coverage [1]. They can adapt to varying traffic requirements dynamically. Smart antennas radiate narrow beam to serve different users and are normally employed at base stations. The complex weight computations that are based on different criteria are integrated in the signal processor in the form of software algorithms [3]. Due to the rapid growing demand in mobile applications not only for capacity but for high quality of service (QoS) and better coverage without increasing the radio frequency spectrum allocation the wireless systems that uses fixed antenna systems will no longer be in use [3] discuss the need for smart antennas in space division multiple access systems. The article focused on adaptive beam forming approach based on smart antennas the adaptive algorithms that are employed to compute the complex weight are discussed and LMS and RLS in particular. The fact that error c omputed from the filter at time n is used to provide the filter coefficient at time n+1 provides a nontraditional way to understand adaptive algorithms. [2] describe the approach of seeing classical adaptive algorithm like LMS, RLS, CMA, Decision directed) as recursive structures. [4] Explain the normalized least mean square (NLMS) algorithm for smart antenna system. The algorithm was implemented on the StarCore SC3400 DSP core and the performance was evaluated on MSC8144 DSP and the antenna coverage pattern was obtained and analyzed to find towards the desired signal source. With adaptive beamforming algorithm to name LMS for smart antenna the downlink multiple-input multiple-output (MIMO) multi-carrier code division multiple access system is proposed [5]. [1] Describes the sequential Studies of beamforming algorithms for smart antenna systems. 2.1 Scope of Smart Antennas Smart antennas assured to award the significant increment in the capacity of system and its performance in the wireless communication system [11]. Which will eventually lead into increase profits for the telecommunications companies and also a decline in blocked and dropped calls. Its been about 45 years Antenna was first used in applications related to radar communication in the form of fixed array. In later years many researches on antenna helped into smart antennas and tiled the way for their uses in commercial wireless systems [12]. These are the main reasons smart antennas got so much interest over the few years. At present the application of smart antennas are predominant at the mobile base stations due to compact area and processing power requirements [13]. Currently, a lot of research is going on the mobile terminal based smart antennas. In the coming future we can expect smart antenna skills to be present at the base station and mobile terminal too. Chapter 3: Introduction to Antennas and Smart Antenna 3.1 Antenna According to IEEE Standard Definitions of Terms for Antenna, it is defined as a means for radiating or receiving radio waves. 3.2 Fundamental parameters of Antenna The fundamental parameters of Antenna are: Radiation pattern Radiation intensity Directive gain and directivity Power gain and Radiation efficiency Front to Back ratio Antenna beamwidth Antenna beam efficiency 3.2.1Radiation Pattern Radiation pattern show the angular variation of field strength. They are drawn at some distance r proportional to field intensity in the direction ÃŽÂ ¸ and à Ã¢â‚¬  . Normalized Field Pattern: It is obtained by dividing the field component by its maximum value. It is dimensionless. EÃŽÂ ¸(ÃŽÂ ¸,à Ã¢â‚¬  ) = EÃŽÂ ¸(ÃŽÂ ¸,à Ã¢â‚¬  ) / EÃŽÂ ¸(ÃŽÂ ¸,à Ã¢â‚¬  ) max Power Radiation Pattern: Power density Pd is defined as power flow per unit area and is given by: Pd(ÃŽÂ ¸,à Ã¢â‚¬  ) =1/2*[E (ÃŽÂ ¸,à Ã¢â‚¬  )] 2/ÃŽÂ ·0 Pattern may also be expressed in terms of power per unit solid angle .The normalized power pattern can also be expressed in terms of this parameter as the ratio of radiation intensity U(ÃŽÂ ¸,à Ã¢â‚¬  ) as function of angle to its max value. Pn(ÃŽÂ ¸,à Ã¢â‚¬  ) = Pd(ÃŽÂ ¸,à Ã¢â‚¬  ) / Pd max(ÃŽÂ ¸,à Ã¢â‚¬  ) The co-ordinates are ÃŽÂ ¸ and dB are used to draw the pattern and calculate by following relation: dB= 10log10Pn(ÃŽÂ ¸,à Ã¢â‚¬  ) 3.2.2 Radiation Intensity The power radiated from an antenna per unit solid angle is called the radiation intensity U. 3.2.3 Directive Gain and Directivity For omnidirectional antenna: the power density at all the points on the surface of a sphere will be same. Pavg = Prad/4à Ã¢â€š ¬r2 The directive gain is defined as the ratio of the power density Pd(ÃŽÂ ¸,à Ã¢â‚¬  ) to the average power radiated. For isotropic antenna, the value of directive gain is unity. The directive gain can be defined as a measure of the concentration of the radiated power in a particular direction (ÃŽÂ ¸,à Ã¢â‚¬  ) . The ratio of the maximum power density to the average power radiated is called maximum directive gain or directivity of the antenna. GDmax = Pdmax/Pavg 3.2.4 Power Gain and Radiation efficiency The relation between input power and power radiated is given as: Prad=ÃŽÂ ·r Pin ÃŽÂ ·r=Prad/ Pin Pin=Prad +Ploss ÃŽÂ ·r=Prad/(Prad +Ploss) The power radiated and the ohmic power loss can be expressed in terms of r.m.s. current as: ÃŽÂ ·r=Rrad/(Rrad +Rloss) The ratio of the power radiated in a particular direction (ÃŽÂ ¸,à Ã¢â‚¬  ) to the actual power input to the antenna is called power gain of antenna. 3.2.5 Front to Back ratio (FBR) It is the ratio of the power radiated in the desired direction to the power radiated in the opposite direction. FBR = Power radiated in desired direction/Power radiated in opposite direction FBR depends on frequency of operation, spacing between antenna elements (inversely proportional) and electrical length of the parasitic elements of the antenna. FBR is an important consideration especially in receiving antennas 3.2.6 Antenna Beamwidth Antenna beamwidth is the measure of the directivity of the antenna. The antenna beamwidth is an angular width in degrees. It is measured on a radiation pattern on a major lobe. 3.2.7 Beam efficiency Total beam area ÃŽÂ ©A consists of the main beam area ÃŽÂ ©M plus the minor lobe area ÃŽÂ ©m. ÃŽÂ ©A= ÃŽÂ ©M+ ÃŽÂ ©m So Beam Efficiency is, M= ÃŽÂ ©M/ ÃŽÂ ©A Stray Factor: The ratio of minor lobe ÃŽÂ ©m area to the total beam area ÃŽÂ ©A is called stray factor. Em= ÃŽÂ ©m/ ÃŽÂ ©A EM + Em= 1 3.3 Smart Antenna The smart antenna is defined as an antenna array system that is supported by processing system that deals with the received and transmitted signal by the array using proper array algorithms to advance wireless system performance. [4] Numbers of distributive antenna elements are combined to make arrays of antennas called smart antenna. The different signals collected by individual antenna are calculated in such a manner that increases the signal strength of desired signal and reduces interference from other signals. [12] A smart antenna can be observed as a combination of antennas, whose transmitted or received signals are processed using smart algorithms. These smart algorithms make antenna work efficiently, and reliable in communication [13]. Main purpose of smart antenna is that the signal comes from the source hit the target in that way if the target is moving the antenna is such a smart and intelligent that it would change its direction according to the target movement and the main lobe of the antenna must be toward the target so that the maximum strength of the signal strikes the target. Mostly Smart antennas are being used in wireless communication systems to provide interference reduction and enhance user capacity and the data rates [6]. 3.4 Uses of Smart Antenna Smart antennas are considered useful in the wireless communication systems. The area coverage and the capacity of a system are increased by Smart antennas. Maximum data rate is increased by using smart antennas in multipath and diminish fading due to the terminating the component of multipath. One of its most useful applications is direction finding with the applications including emergency services and traffic monitoring [11]. In areas with less population, extended coverage is predominant in those areas than increased capacity. I such areas the gain provided by the antennas can extend the range covered by a cell and hence more users can communicate with less system capacity than any other typical antenna. It is used for the interference reduction and rejection as well. Finding the location of user will be a useful application of smart antenna, geo-locations of user and to make downlink beam forming easy [14]. Smart antennas are currently used in Radars, Radio astronomy and mostly used in cellular systems to keep the system speed equal with the number of increasing subscribers. It is also used in defense for safe communication purpose. 3.5CHARACTERISTICS OF SMART ANTENNA There are four main characteristics of smart antenna, DOA (direction of arrival) evaluation Beam forming, antenna diversity beam-width 3.5.1 DIRECTION OF ARRIVAL / ANGLE OF ARRIVAL A measure of the direction of the propagation of electro magnetic radiation upon arrival at a receiver; it is the angle between the plan of the phase front and some plan of reference, usually the horizontal, at the receiver antenna. [9] Direction of arrival indicates the direction from which usually a signal arrives at a point [3]. We can guess the direction of arrival of the signal by using different techniques like multiple signal classification. In this technique an algorithm is used to for frequency estimation and the location of emitter, matrix pencil method or their derivatives. [9] Usage Geodesic location or Geo-location of the cell phones is the main application of direction of arrival nowadays [9].Multiple base stations calculate the angle of arrival of the cell phone signal and this information is combined to locate the cell phone anywhere on the earth. It is generally used to locate the pirate or military radio transmission point. In submarines acoustics, angle of arrival is the method to localize objects with active and passive ranging [9]. 3.5.2 BEAM-FORMING Beam forming is a technique of digital signal processing and its is used for directional signal transmission or reception form the preferred signal direction as compared to some undesired direction [3]. It mean that the techniques which we used have the capability to make the radiation pattern of the antenna by constructive and destructive interference for reception and transmission and to accept moving beams in the direction of preferred signal and put nulls in the direction of interfering signals. This mean due to this co-channel and interference reduce and antenna gain is increased in the direction of desired signal [13]. Figure 3.1 These rebounds from different surfaces can set up time delays, attenuations, phase shifts, and distortions that can interfere with each other at the receiver end of the antenna. It can be set by the digital signal processing techniques used in smart antenna system [15]. 3.5.3 ANTENNA DIVERSITY Antenna diversity uses more then two antennas to develop the quality and dependability of a wireless link [3]. Specially in the areas where LOS is not clear between transmitter and receiver. Before reaching at the receiver end signal is reflected along several paths. This result in introducing phase shift, time delays, attenuation, and distortion which results in the interference between signal arriving before and after the particular signal [9].As two or more antennas receive several observations of the same signal they will calculate the most strengthen signal give the output. 3.5.4 BEAM-WIDTH It means the half-power beam-width [7]. The maximum radiation strength is found, and then the points on both side of the maximum, represent half power of the maximum strength are located. The distance between the half power points is known as the beam-width [16].Half of the power expressed in decibels is -3dB, so half power beam-width is often referred to as the 3dB beam-width. We considered both horizontal and vertical beam-widths. [6] 3.6 TYPES OF SMART ANTENNAS There are two major types of smart antenna switched beam smart antenna and adaptive array smart antenna. 3.6.1 SWITCHED BEAM SMART ANTENNA There are different permanent beam patterns presented in switched beam system. A decision is made as to which beam to be taken, at any given point in time, depend upon the necessities of the system [3]. 3.6.2 ADAPTIVE ARRAY SMART ANTENNA It allows the antenna to focus the beam to any direction of direction of desired signal continuously ignoring interfering signals. Beam direction can be estimated using the direction of arrival (DOA) estimation methods [3]. 3.7 ADVANTAGES For the most part smart antennas are employed at the base station in the mobile network to improve system capacity. Capacity means the number of the users that can be handled in a system. Using of Omni-directional antennas originate co-channel interference when two users use the same band of frequency that finally limits the user capacity in the system [8]. In case of smart antennas beams are focused towards the desired user minimize interference to other users using the same frequency band. 0: Figure 3.2 It helps against multipath fading noise which improves dependability of received signal. Reduced power consumption for cell phones, low probability of interception and detection improved location estimation and improved range of reception [1]. 3.8 DISADVANTAGE Most major disadvantages of smart antenna is in their design and completion in hardware. Multi RF chains can boost the price and make the transceiver bulkier [4]. Most of the devices in the making of a typical antenna used non-linear devices and using smart antenna also increases the components used. If not checked properly, this affects the performance of the antenna [15]. As the data bandwidth required for the digital signal processing increases with the number of antenna elements used. This can limit the data rate for different applications Chapter 4 SMART ANTENNA SYSTEM 4.1 INTRODUCTION Smart Antenna System is combination of multiple antennas which Transmit or Receive Signals using an Adaptation Algorithm [4]. A smart antenna system is combination of many antennas elements with a signal receiving and transmitting ability to optimize its radiation and reception pattern robotically in reaction to the signal environment [10]. 4.2 TYPES OF SMART ANTENNA SYSTEMS There are mainly two ways to implement antennas that dynamically change their antenna radiation pattern to minimize interference or multipath affects by increasing coverage area and range. à ¢Ã¢â€š ¬Ã‚ ¢ Switched beam: There are finite numbers of fixed patterns which are defined by the system (sectors) à ¢Ã¢â€š ¬Ã‚ ¢ Adaptive arrays: There are an infinite number of patterns (scenario-based) which are adjusted in real time The Switched beam approach is easy and simple then the adaptive approach. It increases the network capacity as compared to the usual Omni-directional antenna systems. In this technique, an antenna array produces over lapping beams that cover the neighboring area as in the figure [17]. When a signal is coming and detected, the base station determine the beam that is best associated in the signal-of-interest direction and then switch that beam toward the user for communication [6]. 0: Figure 4.1 [17] The Adaptive array system is efficient then the switched array technique [2]. A mobile user is tracked by this system constantly by routing the main beam towards the destination and at the same time sending no signal in the direction of interfering signals like switched beam. 0: Figure 4.2 [17] 4.2.1 SWITCHED BEAM SYSTEMS Switched beam antenna systems make many fixed beams with finely tuned sensitivity in particular directions [17]. These antenna systems detect strength of signal, choose one from numerous already determined, fixed beams, and switch his beam from one beam to another as the user moves during the sector [11]. The output of many antennas combine through Switched beam systems in such a way that it form finely directional beams with more selectivity than can be achieve with usual, single-element antenna technique. 4.2.1.1 WORKING In this type of adaptive approach in reality did not steer or scan the beam in the direction of the desired signal [17]. Switched beam use an antenna array which radiates a number of overlapping permanent beams covering a elected angular area. The directional beam leads to increase the factor of a frequency reuse in channel by decreasing possible interference and it also increases the range [14]. These antennas system not have a uniform gain in all directions but when they are compared to simple antenna system they have more gain or increased gain in the desired directions. The Switched beam antenna has a switching method that enables the system to select and then switch the desired beam which gives the best response for a mobile user. The selection is generally based on maximum received power for user [9]. 0: Figure 4.3 [3] A usual switched beam system for a base station consists of many antennas with each array covering a certain sector in cell. Take an example of switched beam-forming system below [7]. It consists of a phase shifting network, which forms many beams look in certain directions. The RF switch targets the correct beam in the direction of interest. The measurement for selecting of the correct beam is done by the control logic unit. The control logic unit is controlled by an algorithm which scans all the beams and then selects that beam which is strongest signal based on a measurement calculated by the algorithm. 0: Figure 4.4 [17] This technique is not good when interference is high this technique is simple in operation. Let us consider an example where User 1 is at the side-edge of the beam receiving low power which is entertained by this beam [6]. If there is a second user were at the direction of the null then there will be no interference but if the second user also moves into the direction where user 1 is located then there will be interference occur therefore the switched beam system is suitable where there is no interference [17] 4.2.2 ADAPTIVE ARRAY ANTENNAS Switched beam systems only give a limited performance improvement when compared to common antenna systems in wireless communication [3]. Greater improved performance can be achieved by using superior signal processing technique to practice the information achieved by the antenna arrays. The adaptive array system is Opposite to switched beam systems, they are smarter because they are able to react to the changing RF environment. They have a huge amount of radiation patterns as compared to fixed finite patterns in switched beam systems to adjust in the changing radio frequency environment [9]. An Adaptive array is just like a switched beam system which use number of antennas but they are controlled by signal processing [17]. This signal processing moves the radiation beam towards a desired user as he changes his direction and ii limit the interference happen from other users by launch nulls in their directions. This is shown in figure below [17]. http://i.cmpnet.com/embedded/gifs/2005/0503/0503feat1fig2.jpg 0: Figure 4.5 [17] 4.3 COMPARISON Here are the differences between switched bean array and adaptive beam array 4.3.1 SWITCHED BEAM SYSTEM It uses many preset directional beams with slim beam-widths. The necessary phase shifts be provide by normal preset phase shifting networks e.g. the butler matrix [11]. They do not need difficult algorithms, easy algorithms are used for selection of beam It need only reasonable relations between mobile and base station as compared to adaptive array system [15]. Because low technology is used it has minor price and complication. Mixing is easy and cheap into existing cellular system. It give important increase in coverage and capacity compare normal antenna based systems [6]. Since many slim beams are used, normal intra-cell hand-offs occur between beam when a mobile moves from one beam to another [15]. It does not make a distinction between direct signal and interfering signal this leading to undesired improvement of the interfering signal more than the desired signal [6]. à ¢Ã¢â€š ¬Ã‚ ¢ Switched beam systems offers limited co-channel interference control as compared to the adaptive array system. 4.3.2 ADAPTIVE ARRAY SYSTEM A whole adaptive system; moves the beam towards desired signal and put nulls toward interfering signal directions [17]. It is implemented on DSP technology [17]. To steer the beam and the nulls complicated adaptive algorithm is required [6]. Rejection capably of interference is much better then the switching beams system [15]. It is difficult to impose on existing systems, i.e. up gradation is hard and costly. Since nonstop moving of the beam is required as the user moves, high contact between the mobile and base station is required [17]. It provides improved coverage and improved capacity because of improved interference elimination as compare to the Switched beam. It can either decline multipath components or add them by correcting the delays to improve the signal quality[6]. 4.4 ANTENNAS SMARTNESS Smart antenna systems using these adaptive systems are quite smart in the true sense and that is why they are referred as smart antennas [17]. The smartness of these systems is due to the intelligent processor using digital processing techniques which are integrated in these systems. These signal processing techniques use complex algorithms which are our main concern in our project [11]. As modern world is using advanced technology in different fields, smart antenna also comes with such type of digital formation algorithms that operate the signals in accurate and flexible manner. On the way to the smart antenna, the signal is received, converted and modulated for transmission into digital signal and at the other end it is reconverted in analog information [5]. 4.4.1 BASIC MECHANISM There are a lot of function a smart antenna can perform on the bases of techniques used for desired scenario. Some of them major functions smart antenna can perform are listed below First: Smart antenna can locate the direction as well as the angle of arrival of all the incoming signals [16]. Whether they are interfering in the signal of our interest or they are same signals arriving at the antenna from different directions after reflection from different surfaces. Their direction is estimated by the processing techniques used in smart antennas. Secondly: The signal of our interest can separated from the cluster of all the incoming signals using smart antenna systems. Lastly a beam is moving in the direction of the wanted signal and the user is traced when he moves in the area and placing noting at interfering signal directions by continually updating the weights [17]. It is pretty obvious that the direction of radiation beam of the main lobe in an array depends upon the phase difference between the elements of the array. Thus it is possible to constantly move the main beam in any direction by adjusting the phase difference between the elements. The same concept is used in adaptive array systems in which the phase is tuned to attain highest radiation in the most wanted direction. 4.5 ADAPTIVE ALGORITHM CLASSIFICATIONS The adaptive algorithms can be classify into category base on different approach given below Continuous adaptation: The algorithms based on this technique fine-tune the weights as the arriving data is sampled and continue updating it in such a way that it converges to an finest solution. This approach is suit able when the signal information is varying with time. Examples: The Least Mean Square (LMS) algorithm and the Recursive Least square (RLS) algorithm [17]. Block adaptation: The algorithms based on this technique calculate the weights depend on the approximation achieve from a temporary chunk of data [3]. This method can be used in a non-stationary situation provided the weights are calculated from time to time. Example: The Sample Matrix Inversion (SMI) algorithm [17]. Reference signal based algorithms: These types of algorithms worked on the principal of minimization of the mean square error between the received signal and the original signal. Hence it is necessary that an original signal is available which has high relationship with the desired signal [17]. Examples: The Least Mean Square (LMS) algorithm, The Recursive Least square (RLS) algorithm [17]. Blind adaptive algorithms: These algorithms do not want any original signal information. They are generating the necessary ordinal signal from the received signal to get the desired signal. Examples: The Constant Modulus Algorithm (CMA). CHAPTER 5ALGORITHMS It is obvious that themselves antennas or not much intelligent to perform such.It is the importance of antenna system which is such clever in aspect of advanced signal processing algorithms. In order to use the smart antenna to its full smart techniques superior and computationally smart algorithms must be used. There are number of algorithms which are optimized and specialized for different smart antenna system and for different scenarios. For this purpose here are the few algorithms we have studied till the day to get a brief idea about the smart antenna systems are given below. LMS (Least Mean Squares) RLS (Recursive Least Squares) CMA (Constant Modulus Algorithm) We will try to give a logical comparison on the performance of different Adaptive Algorithms for beam forming for our Smart Antenna. In this study we have exposed that these algorithms RLS and LMS are best for making beam forming like main lobe towards desired user but they have boundaries towards reject interference. In case of CMA has improved response towards beam forming and it gives improved results for interference rejection, but there is a problem the Bit Error Rate (BER) is greatest and high in case of single antenna element in CMA. It is confirmed that convergence rate of RLS is faster than LMS so RLS is proved the best choice for us. The effect of changing step size for LMS algorithm has also been studied. 5.1 CMA (CONSTANT MODULUS ALGORITHM) CMA is based on those methods which are old but many of them are modified or completely changed techniques. This is popular algorithm and we are using this algorithm for blind adaptive array processing for beam pattern. But there is a problem with this algorithm it has low convergence rate because it is a type of instant gradient searching method depend on performance surface. Later some enhanced algorithms such as orthogonal constant modulus (OCMA) and least square constant modulus algorithm (LSCMA) are proposed [4].OCMA use the Newton algorithm and LSCMA is a type of block-update interactive algorithm. Both use estimation of revision of covariance matrix. This means high calculation complexity and convergence rate is improved. But they will not converge when covariance matrix is positive and singular. Faster convergence rate, constant convergence steps, lower computational complexity and better numerical stability will be achieved with instant gradient searching and conjugate gradi ent algorithm [2]. Conclusion A constant modulus algorithm based on modified conjugate gradient for adaptive array processing. CMA algorithm has the similar performance as high convergence rate algorithm such as LSCMA; there is an advantage that they do not need to perform matrix inversion and its performance is improved then other type of conjugate gradient algorithms 5.2 LMS (Least Mean Squares) and RLS (Recursive Least Squares) An adaptive algorithm has a natural recursive formation even in the case of a limited impulse response modelization. As the error

Experimenter Expectancy Effect On Children In A Classroom Setting :: essays research papers

Experimenter Expectancy Effect On Children in a Classroom Setting   Ã‚  Ã‚  Ã‚  Ã‚  Rosenthal and Jacobson (1966) sought to test the experimenter expectancy effect by examining how much of an outcome teachers' expectancies could have on a group of children. Earlier investigations in this area were also conducted by Rosenthal (1963). He worked with children in a research lab, giving each one a rat and telling them it was either bred for intelligence or for dullness. The children were put in charge of teaching the rats how to learn mazes. Rosenthal's results showed that the rats that were believed by the students to be smart, were able to learn the mazes much quicker. What the children did not know, i.e., what Rosenthal had kept hidden, was that the rats were chosen at random. There were no rats that were especially bright or dull. Another case of the experimenter expectancy effect was that of the horse known as â€Å"Clever Hans†. It seemed to be able to read, spell, and solve math problems by kicking his leg a number of times. The horse was tested and passed, but what the experts did not realize was that their own hopes for the horse to answer the questions, were giving the horse signs on which he based his answers. That is, if someone on the committee raised his/her eyebrows in anticipation of the oncoming correct answer, the horse would stop stomping. Once again, the experimenter's cues decided the outcome of the tests. Acting on these results, Rosenthal and Jacobson hypothesized that teacher's expectancies would cause them unintentionally to treat the students they thought to be bright in a different manner than those they thought to be average or even less bright.   Ã‚  Ã‚  Ã‚  Ã‚  Rosenthal and Jacobson used some materials that were important in the completing their investigation. The experimenters used students and their teachers as the subjects of their study. As part of their experiment, they even chose which grades the students would be in. They also used Flanagan's Tests of General Ability as a disguise to predict academic expectancies. The experimenters did not use anything else in their experiment but instead let their subjects do the rest. Rosenthal and Jacobson's goal was to see how teachers would treat students whom they thought were of above average intelligence in comparison to how they treated students whom they believed were of below average intelligence.   Ã‚  Ã‚  Ã‚  Ã‚  As with all experiments, there needed to be variables. In trying to test teacher's expectancies, Rosenthal and Jacobson used labels for children as their independent variable. The labels used were â€Å"bloomers† for children who were expected to be above average, while the other group of children were

Green Grass, Running Water Essay

The novel Green Grass, Running Water is a multifaceted work of art in the literal sense. The plot circles around an Indian tribe i.e. the Blackfoots, while interweaving myths and the stereotypical attitude towards Native Americans into the macro picture. It takes an extremely sensitive topic and makes sense of it through a comical way. Through the book King raises a voice against the treatment of the Native culture and way of life at the hands of the ‘white,’ through humorous and witty settings, plots and dialogues. One can easily spot the shots that have taken against the government that went onto cheat the Natives in the name of friendship, the idea of religion, the social stigma that plagues the Natives and a whole lot more. The discord created by Coyote is a very integral part of the novel. In the story Coyote is the Trickster, and along with him the four Indians namely Lone Ranger, Ishmael, Robin son Crusoe, and Hawkeye set their course towards the Blackfoot reservation so they can find things to ‘fix’ (133). When they come onto the reservation everything goes topsy-turvy. Through the re-telling of old Native American legends King puts things into a different perspective for the reader. On top of the Native legends one will be amused by the many references to biblical stories as well. When it comes to the role of Coyote we know that he is one force that is present long before the world really exists. In the start where there was nothing but â€Å"just the water† even then the trickster was present, â€Å"but Coyote was asleep†. This in itself can be taken as a testimonial for Coyote’s strength and importance. Whenever Coyote enters the plot he manages to wreak havoc by influencing the events and people around him. He does this on more than one occasion by simply making a joke or performing a ritual. It is important to note though that Coyote never indulges in direct violence, his idea of wreaking havoc comes from a very passive stance so to speak. His actions are based on what the others say and how he can manipulate their words.   In the length of the novel Coyote assists in ‘fixing the world’ through interconnecting European tales with Native ones. He distorts the stories that were brought in by the early settlers by adding the Native flavor to them, thereby coming up with completely new stories altogether. One instance where Coyote and the four Indians try to ‘fix’ the world is the dam. The thing to note here is that the damn is not going to bring any good to the Natives. The government has ignored many things, such as the fault lines, while making the damn. In effect it would bring great problems to the people living around the area if it were to break. Coyote possesses mystical powers and can manipulate the environment around him. In one of the scenes from the book Ishmael and Robinson Crusoe ask him whether he has been dancing or singing to which he replies â€Å"Just a little† (341) on both counts. At that point a great earthquake hits the land and causes the stress fractures under the dam to open up. Now, the dam in essence was bad, but once it had been built it would have been worse for it to just fall apart. At one glance one might thing that Coyotes doing was negative rather than positive. However, with the supernatural demolition of the dam, the flood that follows symbolically washes away pieces of the colonial heritage. The Natives are then able to defy the government and reclaim their land. Even Eli, who ended up dying in the process, is a symbol of strength for the remaining people. His cabin stands are an icon for the rest, a piece of their heritage which one of their own died protecting. Even though Coyote caused death, he still managed to give people something to hold onto, something to huddle them closer to their own Native values. Another example of Coyote’s well meaning intentions’ going wrong is the John Wayne movie, where he manages to twist and turn the story through the use of linguistic violence and ends up completely distorting it. This is good because he inculcates the Native culture and values into the story which is important for the main characters on the Blackfoot reserve. The well known story ‘The Mysterious Warrior’ is toyed with. In an attempt to change the world, they end up changing the classic too. In the new version the Indians are not the ones who die terrible deaths but John Wayne and Richard Widmar instead. The Natives that had been hunted by the cavalry suddenly begin to fight back and massacred their assailants. The Natives on the reserve need this kind of reinforcement because they are losing their own values and their heritage and not because they want to, but because they cant find the will to really fight for it. Eli is the only one who really pushes for anything, while the rest themselves have managed to infuse ‘white’ culture into every part of their lives. An example of this is Latisha who is only using her heritage and that too by inventing things that never existed in the Native culture to begin with i.e. selling dog meat burgers (which are really hamburgers) to tourists claiming it to be a Native tradition, when it wasn’t. Coyote at times hinders the path of the other four Indians as well. In a way he is the embodiment of the struggle of the Natives against the ‘whites’. His actions may at times seem completely negative, but one must remember that Coyote has been around for a while. And in the end his actions only end up benefiting the Natives of the reserves. Throughout the novel it would seem as though Coyote has induced certain events almost by mistake or through carelessness but once it has run its course it only ends up helping the Blackfoots. In a way it can be said that Coyote has wisdom beyond what most can understand which is why it is possible that he just might know how things will turn out at the culmination. Coyote tends to intertwine the old ways with the new norms. He uses many biblical references (albeit distorting them completely) and the legends of the old age and present them in a very contemporary way.   His distortion of the white tales helps by cleansing the invasive stereotypes and stigma that surround the Indians of today. In one instance a dam builder says to Eli â€Å"Besides, you guys aren’t real Indians anyway. I mean, you drive cars, watch television, go to hockey games. Look at you. You are a university professor† (King 119). This shows the ignorance and misconceptions about the Natives. The general public is completely oblivious of these people, their lives and how they exist. Coyote in his own crazy way tries to do away with this kind of mentality. Thus, Coyote manages to pull the Natives together. The culture and heritage that has been eluding them and at times confusing them is brought back by him. His actions may at times seem overly negative but in the long run they always prove to be good for the people on the reserve. This is why in totality one can only say that the Tricksters actions are positive and not negative. Work Cited Green Grass, Running Water: Thomas King (1993)

The Worldwide Eradication Of Foot And Mouth Disease

The Worldwide Eradication of Foot and Mouth Disease The potential threat of a foreign animal disease is always at the back of an agricultural livestock producer s mind because it could possibly be devastating both economically and environmentally. The disease has the potential to wipe out a large percentage of the livestock animal population, thus affecting the way the US uses the land that supports food animal production. The possibility of an outbreak of Foot and Mouth Disease is a big area of interest because of the ramifications the disease would have on the United States, but it would also be a great threat to any FMD free country. This disease is a highly infectious, viral disease of cloven-hoofed species. The tell-tale signs of†¦show more content†¦The tourism in the country would decline because of the fear of spreading the disease and there would be strict travel restrictions. The studies on how much an outbreak of FMD would cost the United States estimate that it w ould cost billions of dollars to completely solve the problem (Rushton). The United States and other FMD free countries are controlling the spread of the disease by prevention. This practice is normally the best policy, but in the case of FMD there are so many bases to cover. The countries prohibit the importation of meat and infected animals from FMD-affected countries. There are travel restrictions in place that try to prevent people from the affected countries from bringing the disease into the unaffected countries. The travel entrances into the country have strict bio-safety procedures in place similar to the rules enforced on farms. The example includes swine farms which enforce strict bio-security rules in order to protect the animals from outside contamination. The United States Department of Agriculture makes an effort to work with U.S Customs in order to monitor those entrances. The USDA makes sure that the public knows about FMD so that they can assist in the effort to contain it. The United States has eradicated FMD as of right now and the last outbreak was in 1929 in California, but experts predict it is just a matter of time before the disease pops up in the country.