About Vikings History, Locations, and Characteristics

About Vikings History, Locations, and Characteristics The Vikings were a Scandinavian people profoundly dynamic in Europe between the ninth and eleventh hundreds of years as pillagers, dealers, and pilgrims. A blend of populace pressure and the simplicity with which they could strike/settle is ordinarily refered to as the reasons why they left their country, the locales we currently call Sweden, Norway, and Denmark. They settled in Britain, Ireland (they established Dublin), Iceland, France, Russia, Greenland and even Canada, while their strikes took them to the Baltic, Spain, and the Mediterranean. The Vikings in England The principal Viking strike on England is recorded as being at Lindisfarne in 793 CE. They started to settle in 865, catching East Anglia, Northumbria, and related grounds before battling with the lords of Wessex. Their locales of control changed extraordinarily throughout the following century until England was controlled by Canute the Great who attacked in 1015; he is commonly viewed as one of Englands smartest and most capable lords. Nonetheless, the decision House which went before Canute was reestablished in 1042 under Edward the Confessor and the Viking age in England is considered to have gotten done with the Norman Conquest in 1066. The Vikings in America The Vikings settled the south and west of Greenland, as far as anyone knows in the years following 982 when Eric the Red †who had been prohibited from Iceland for a long time †investigated the locale. The remaining parts of more than 400 ranches have been found, yet the atmosphere of Greenland in the long run turned out to be unreasonably cold for them and the settlement wrapped up. Source material has since quite a while ago referenced a settlement in Vinland, and late archeological revelations of a brief settlement in Newfoundland, at LAnse aux Meadows, have as of late brought into the world this out, in spite of the fact that the subject is as yet disputable. The Vikings in the East Just as attacking in the Baltic, by the tenth century Vikings settled in Novgorod, Kiev, and different regions, converging with the nearby Slavic populace to turn into the Rus, the Russians. It was through this eastern development that the Vikings had contact with the Byzantine Empire †battling as hired fighters in Constantinople and framing the Emperors Varangian Guard †and even Baghdad. Valid and False The most well known Viking attributes to current perusers are the longship and the horned head protector. All things considered, there were longships, the Drakkars which were utilized for war and investigation. They utilized another art, the Knarr, for exchanging. In any case, there were no horned caps, that trademark is altogether bogus. Popular Vikings Ruler Canute the GreatEric the Red, pilgrim of Greenland.Leif Ericsson, pioneer of VinlandSweyn Forkbeard, King of England and Denmark.Brodir, dynamic in Ireland.

Effective teaching free essay sample

In fall 2009, the Bill Melinda Gates Foundation propelled the Measures of Effective Teaching (MET) venture to test new ways to deal with estimating successful instructing. The objective of the MET venture is to improve the nature of data about showing viability accessible to training experts inside states and districts†data that will assist them with building reasonable and solid frameworks for estimating educator adequacy that can be utilized for an assortment of purposes, including criticism, advancement, and constant improvement. The venture incorporates about 3000 educators who elected to assist us with distinguishing a superior way to deal with instructor advancement and assessment, situated in six overwhelmingly urban school regions the nation over: Charlotte-Mecklenburg Schools, Dallas Independent School District, Denver Public Schools, Hillsborough County Public Schools (counting Tampa, Florida), Memphis City Schools, and the New York City Department of Education. As a feature of the venture, different information sources are being gathered and broke down more than two school years, including understudy accomplishment gains on state evaluations and supplemental appraisals intended to survey higher-request applied comprehension; study hall perceptions and instructor reflections on their training; appraisals of teachers’ educational substance information; understudy view of the study hall instructional condition; and teachers’ impression of working conditions and instructional help at their schools. The venture is coordinated by Thomas J. Kane, Deputy Director and Steven Cantrell, Senior Program Officer at the Bill Melinda Gates Foundation. Our lead look into accomplices include:  ¦Ã¢ ¦  ¦Ã¢ ¦ Mark Atkinson, Teachscape Nancy Caldwell, Westat Charlotte Danielson, The Danielson Group Ron Ferguson, Harvard University Drew Gitomer, Educational Testing Service Pam Grossman, Stanford University Heather Hill, Harvard University Eric Hirsch, New Teacher Center Dan McCaffrey, RAND Catherine McClellan, Educational Testing Service Roy Pea, Stanford University Raymond Pecheone, Stanford University Geoffrey Phelps, Educational Testing Service Robert Pianta, University of Virginia Rob Ramsdell, Cambridge Education Doug Staiger, Dartmouth College John Winn, National Math and Science Initiative Introduction For four decades, instructive specialists have affirmed what numerous guardians know: children’s scholarly advancement relies intensely upon the ability and aptitudes of the educator driving their study hall. In spite of the fact that guardians may worry over their decision of school, inquire about proposes that their child’s instructor task in that school matters significantly more. But, in most government funded school locale, singular educators get little criticism on the work they do. Everywhere, educator assessment is a cursory exercise. In an excessive number of schools principals make a cursory effort of visiting study halls, agenda close by. At long last, for all intents and purposes all instructors get the equivalent â€Å"satisfactory† rating. 1 The expenses of this disregard are tremendous. Beginner teachers’ abilities level unreasonably right on time without the criticism they have to develop. In like manner, there are too scarcely any open doors for experienced instructors to share their training and reinforce the calling. At last, principals are compelled to settle on the most significant choice we ask of them†giving residency to starting instructors still from the get-go in their careersâ€with minimal target data to control them. In the event that we state â€Å"teachers matter† (and the exploration plainly says they do! ), for what reason do we give so little consideration to the work they do in the homeroom? On the off chance that instructors are delivering drastically various outcomes, why don’t we furnish them with that criticism and trust them to react to it? Settling the inconsistency will require new instruments for picking up understanding into teachers’ practice, better approaches to analyze their qualities and shortcomings and new ways to deal with creating educators. In the Fall of 2009, the Bill Melinda Gates Foundation propelled the Measures of Effective Teaching (MET) undertaking to test new ways to deal with recognizing powerful instructing. The objective of the undertaking is to improve the nature of data about instructing viability, to assist work with fairing and solid frameworks for instructor perception and input. OUR PARTNERS Albeit financed by the Bill Melinda Gates Foundation, the MET venture is driven by in excess of twelve associations, including scholarly establishments (Dartmouth College, Harvard University, Stanford University, University of Chicago, University of Michigan, University of Virginia, and University of Washington), not-for-profit associations (Educational Testing Service, RAND Corporation, the National Math and Science Initiative, and the New Teacher Center), and other instructive advisors (Cambridge Education, Teachscape, Westat, and the Danielson Group). Also, the National Board for Professional Teaching Standards and Teach for America have urged their individuals to take part. The American Federation of Teachers and the National Education Association have been occupied with the undertaking. For sure, their neighborhood heads effectively helped select educators. 1 T he 2009 New Teacher Project study, The Widget Effect, found that assessment frameworks with two appraisals, â€Å"satisfactory† and â€Å"unsatisfactory,† 99 percent of instructors earned an agreeable. In assessment frameworks with multiple evaluations, 94 percent of instructors got one of the best two appraisals and short of what one percent were evaluated unsuitable. Introductory Findings from the Measures of Effective Teaching Project | 3 Yet, our most imperative accomplices are the almost 3000 educator chips in six school regions around the nation who chipped in for the venture. They did so as a result of their responsibility to the calling and their longing to grow better instruments for criticism and development. The six regions facilitating the undertaking are altogether dominatingly urban areas, spread the nation over: CharlotteMecklenburg Schools, Dallas Independent School District, Denver Public Schools, Hillsborough County Public Schools (counting Tampa, Florida), Memphis City Schools, and the New York City Department of Education. THE THREE PREMISES OF THE MET PROJECT The MET venture depends on three basic premises: First, at whatever point possible, a teacher’s assessment ought to incorporate their students’ accomplishment gains. Some raise authentic worries about whether understudy accomplishment picks up measure all of what we look for from educating. Obviously, they’re right. Each parent needs their youngsters to construct social abilities and to procure an affection for learning. In like manner, our different society needs kids who are open minded. Be that as it may, these objectives are not really at chances with accomplishment on state tests. For example, it might be that a viable educator prevails by moving an affection for learning, or by instructing kids to cooperate adequately. We will test these theories in future reports, utilizing the information from our understudy overviews. For instance, it might be conceivable to include proportions of understudy commitment as extra result measures. This would be especially valuable in evaluations and subjects where testing isn't doable. Others have raised separate worries about whether â€Å"value-added† gauges (which utilize factual techniques to recognize the effect of instructors and schools by altering for students’ earlier accomplishment and other estimated attributes) are â€Å"biased† (Rothstein, 2010). They call attention to that a few instructors might be appointed understudies that are efficiently extraordinary in other waysâ€such as inspiration or parental engagementâ€which influence their definitive execution yet are not sufficiently caught by earlier accomplishment measures. As we portray beneath, our examination tries to determine that question with a report the following winter. Around then, we will test whether esteem included measures precisely anticipate understudy accomplishment following arbitrary task of educators to study halls (inside a school, evaluation and subject). Nonetheless, in the meantime, there is little proof to recommend that esteem included measures are so one-sided as to be directionally deceptive. Despite what might be expected, in a little example of educators relegated to explicit lists by lottery, Kane and Staiger (2008) couldn't dismiss that there was no inclination and that the worth included measures approximated â€Å"causal† instructor impacts on understudy accomplishment. Besides, an ongoing re-examination of an analysis intended to test study hall size, yet which additionally haphazardly alloted understudies to educators, revealed instructor consequences for understudy accomplishment which were, actually, bigger than huge numbers of those detailed in esteem included investigations (Nye, Konstantopoulos and Hedges, 2004). Worth added measures do appear to pass on data about a teacher’s sway. Be that as it may, proof of inclination toward the finish of this current year may require downsizing (or up) the worth included estimates themselves. In any case, that’s to a great extent a matter of deciding how much weight ought to be joined to valueadded as one of numerous proportions of educator viability. 4 | Learning about Teaching Second, any extra parts of the assessment (e. g. , study hall perceptions, understudy input) ought to be obviously identified with understudy accomplishment gains. The subsequent rule is basic, particularly given that most educators are getting the equivalent â€Å"satisfactory† rating now. On the off chance that school regions and states essentially give principals another agenda to round out during their study hall visits little will change. The best way to be sure that the new criticism is pointing instructors in the privilege directionâ€toward improved understudy achievementâ€is to consistently affirm that those educators who get high

Hirschi About The Social Control Theory

Hirschi About The Social Control Theory “The highest possible stage in moral culture is when we recognize that we ought to control our thoughts and actions”, Charles Darwin. Social control theory definition Social control is a concept within the disciplines of the social science. Social control, within sociology, refers to the many ways in which our behavior, thoughts, and appearance are regulated by the norms, rules, laws, and social structures of society. Social control is a necessary component of social order, for society could not exist without it. Hirschi’s social control theory The Social Control Theory, originally known as The Social Bond Theory in 1969, was developed by Travis Hirschi. The central question of the theory asks why do people follow the law? The theory suggests that people engage in criminal activity when their bond to society has weakened. Hirschi states that “social control theory refers to a perspective which predicts that when social constraints on antisocial behavior are weakened or absent, delinquent behavior emerges.” Social disorganization theory points to broad social factors as the cause of deviance. A person is not born a criminal, but becomes one over time, often based on factors in his or her social environment. This deviance in his behanior is seen to result where feelings of disconnection from society predominate. Individuals who believe they are a part of society are less likely to commit crimes against it. Social bonds and restraints Hirschi identified four types of social bonds that connect people to society: Attachment measures our connections to others. People conform to society’s norms in order to gain approval (and prevent disapproval) from family, friends, and romantic partners when they are closely attached to people and worry about their opinion. Commitment refers to the investments we make in conforming to conventional behaviour. A well-respected local businesswoman who volunteers at her synagogue and is a member of the neighbourhood block organization has more to lose from committing a crime than a woman who does not have a career or ties to the community. Similarly, levels of involvement, or participation in socially legitimate activities, lessen a person’s likelihood of deviance. The final bond, belief, is an agreement on common values in society. If a person views social values as beliefs, he or she will conform to them. An environmentalist is more likely to pick up trash in a park because a clean environment is a social value to that person. Forms of Social control Social control tends to take one of two different forms: informal or formal. Informal social control refers to our conformity to the norms and values of the society, and adoption of a particular belief system, which we learn through the process of socialization. This form of social control is enforced by family, primary caregivers, peers, other authority figures like coaches and teachers, and by colleagues. Informal social control is enforced by rewards and sanctions. Reward often takes the form of praise or compliments, but also takes other common forms, like high marks on school work, promotions at work, and social popularity. Sanctions used to enforce informal social control from confused and disapproving looks, to conversations with family, peers, and authority figures, to social ostracization, among others. Formal social control is that which is produced and enforced by the state (government) and representatives of the state that enforce its laws like police, military, and other city, state, and federal agencies. Social control theory in criminology Unlike most criminology theories that purport to explain why people offend, control theory offers the justification for why people obey rules. Social control theories, however, focus primarily on external factors and the processes by which they become effective. Deviance and crime occur because of inadequate constraints. Crime and deviance are considered predictable behaviors that society has not curtailed. Explaining conformity, particularly the process by which people are socialized to obey the rules, is the essence of social control theory. Thus, social control theory focuses on how the absence of close relationships with conventional others can free individuals from social constraints, thereby allowing them to engage in delinquency. Why people commit crime? Many people have their own theories on what makes a criminal. Some of these theories are based on first hand knowledge or experience, some unfortunately may be based on racism or prejudice, and some on scientifically investigated studies. The causes of crime are complex. Most people today accept that poverty, parental neglect, low self-esteem, alcohol and drug abuse are all connected in explaining why people commit crimes. For example, it is much easier to steal money than to work for it. So in the eyes of control theorists, crime requires no special explanation: it is often the most expedient way to get what one wants. Some people are simply at greater risk of becoming offenders because of the circumstances into which they are born. Individualists tend to focus on individual weakness or lack of values as the reason why people commit crimes. Examining why people commit crime is very important in the ongoing debate of how crime should be handled and prevented. Any society must have harmony and order. Where there is no harmony or order the society actually does not exist because society is a harmonious organization of human relationships. The results of social control are not always beneficial to society or to the individual. Using the force to influence on individuals to correct the deviation in their behavior is not always a good option on solving the problem. It may cause mental disorders, psychosomatic illnesses and other disorders and, as the result, to increase the number of psychopaths and sociopaths in our society. One of the reasons that individuals comply with norm prescriptions and avoid counter-normative actions or attitudes is fear of social negative evaluation by others. In the worst cases, individuals tend to respond with the force or to resign completely to act in accordance to social norms. This type of behavior called “rebel”- one may be followed by crimes made on purpose as they could be performed as a form of disobedience in the future. However, social control is necessary to protect social interests and satisfy common needs. If social control is removed and every individual is left to behave freely society would be reduced to a state of lawlessness.

Champlain College SAT Scores, Acceptance Rate

Admissions at Champlain College are largely open. Those with grades and test scores above average have a good chance of being admitted; however, Champlain looks at more that just scores and grades. Students can fill out an application with the school, or via the Common Application (more on that below). In addition to an application, students will need to submit scores from the SAT or ACT, as well as recommendations and a high school transcript. Personal interviews are not required  Ã¢â‚¬â€¹but are encouraged. Students interested in applying to any arts programs should check out the schools admissions website for more information about submitting portfolios.   Admissions Data (2016) Champlain College Acceptance Rate: 70%Test Scores -- 25th / 75th PercentileSAT Critical Reading: 520 / 630SAT Math: 510 / 630SAT Writing: 490 / 600What these SAT numbers meanCompare SAT scores for Vermont collegesACT Composite: 23 / 29ACT English: 23 / 29ACT Math: 21  / 287What these ACT numbers meanCompare ACT scores for Vermont colleges Champlain College Description: Champlain College is not your typical small private college. When you look at some of the majors that Champlain offers, like game design and radiography, youll see why. The college does have a liberal arts foundation, but the curriculum is designed to have specific and sometimes niche applications in the world. Students are encouraged to explore their major from the first year, gain practical knowledge, and develop conceptual and critical thinking skills. Students can even bring their own business to college as part of the BYOBiz program and receive course work and mentoring to help with their business goals. Enrollment (2016) Total Enrollment: 4,778  (3,912 undergraduates)Gender Breakdown: 59% Male / 41% Female66% Full-time Costs (2016 - 17) Tuition and Fees: $38,660Books: $1,000Room and Board: $14,472Other Expenses: $2,174Total Cost: $56,306 Champlain College Financial Aid (2015  - 16) Percentage of New Students Receiving Aid: 96%Percentage of New Students Receiving Types of AidGrants: 96%Loans: 69%Average Amount of AidGrants: $16,699Loans: $9,795 Academic Programs Most Popular Majors:  Accounting, Business Administration, Computer and Information Sciences, Criminal Justice, Elementary Education, Liberal Arts, Multimedia Graduation, Retention and Transfer Rates First Year Student Retention (full-time students): 82%Transfer-out Rate: 28%4-Year Graduation Rate: 54%6-Year Graduation Rate: 62% Data Source National Center for Educational Statistics If You Like Champlain College, You May Also Like These Schools Ithaca College: Profile | GPA-SAT-ACT GraphDrexel University: Profile | GPA-SAT-ACT GraphEndicott College: Profile | GPA-SAT-ACT GraphBennington College: Profile  Syracuse University: Profile | GPA-SAT-ACT GraphBoston University: Profile | GPA-SAT-ACT GraphRochester Institute of Technology: Profile | GPA-SAT-ACT GraphUniversity of Vermont: Profile | GPA-SAT-ACT GraphRoger WIlliams University: Profile  Emerson College: Profile | GPA-SAT-ACT GraphBurlington College: Profile   Champlain and the Common Application Champlain College uses the  Common Application. These articles can help guide you: Common Application essay tips and samplesShort answer tips and samplesSupplemental essay tips and samples

The Philosophical and Moral Component of Virtue Ethics Movie Review

Essays on The Philosophical and Moral Component of Virtue Ethics Movie Review The paper "The Philosophical and Moral Component of Virtue Ethics" is a good example of a movie review on philosophy. The lecture attempts to explain the intricacies that revolve around the philosophical yet moral component of virtue ethics. It is important to understand the history of virtue ethics to disseminate the facets that make up the topic. The lecture makes it evident that virtue ethics stemmed from the Greeks’ perspective to the modern-day philosophers who view virtue ethics as a moral obligation among humanity. The video illustrates the transition of virtue ethics from the Greeks who viewed it as a source of good living. The rise of Judaism and Christianity broadened the scope of virtue ethics and termed it as divine commands. Finally, due to continued secularism, the scope shifted to a subject of moral law terming virtue ethics as the most appropriate thing to do. The video continues to explain the modern-day view of virtue ethics as propelled by philosophers such as John Stuart Mill (utilitarianism) and Emmanuel Kant (Absolutism). According to the theory of utilitarianism, virtue ethics entail maximizing the good for the greatest population. On the other hand, the theory of absolutism entails accepting and following a set of beliefs as an obligation. However, the lecture creates a point of deviation from the theoretical point of view to a simplified perspective of virtue ethics as described by Aristotle. The video points out that Aristotle based his perspective on virtue ethics as the good of man. In addition, a comparison of such perspective with that of the Bible indicates that humanity ought to love without conditions or a set of beliefs. The explanation derived from the video indicates that virtue ethics is a balance between two extremes; that of deficiency and excess. As such, virtue ethics is about morality. In addition, Aristotleâ€⠄¢s perspective, as per the video, indicates that such a balance entails what humanity considers as good rather than a set of guidelines and beliefs as that of absolutism.

Itt Tech Comp. Ii Final Paper Free Essays

Course Project Submission The Legalization of Marijuana J. Doe ITT Technical Institute March 7, 2013 Composition II Dr. Sue Introduction Marijuana should be legalized. We will write a custom essay sample on Itt Tech Comp. Ii Final Paper or any similar topic only for you Order Now That is the decision everyone in our group has come to. We believe the pros of marijuana use greatly outnumber the cons, and that the government needs to realize that. Defending either side of this argument is actually quite difficult. Any studies that you may find can be disproven by studies performed from the opposition and vice versa. Still, we have not found anything that has even came close to changing our opinions. Medical Use Many studies have been performed that prove marijuana can help with the treatment of many types of cancers. Metastasis is when cancer cells spread from one part of the body to another (Mandal, n. d. , What is Metastasis). Scientists at California Pacific Medical Center have found a compound in marijuana that can actually stop metastasis. This compound is called Cannabidiol. They learned this first by testing the compound on animals that had cancer and have proven that it works. They are now waiting on approval to begin human testing (Wilkey, 2012, Marijuana and Cancer). It can also be used to replace many pain pills that damage our kidneys and cause major addictions. Studies show that smoking marijuana can help lessen nerve pain or pain caused by surgery. â€Å"About 10% to 15% of patients attending a chronic pain clinic use cannabis as part of their pain control strategy†(Doheny, 2010, Marijuana Relieves Chronic Pain). Lower Crime Rates In 2011, after legalizing marijuana in California, the juvenile crime rate dropped 20 percent. The number of arrests for violent crimes dropped by 16 percent, homicide went down by 26 percent and drug arrests decreased by nearly 50 percent. In 2010, marijuana possession accounted for 64 percent of all drug arrests, and in 2011, that number decreased to only 46 percent (Sankin, 2012, California Marijuana Decriminalization). Many people believe that drug dispensaries would attract crime. A study has shown that crime actually seems to be much less near the dispensaries then in the areas where dispensaries have been closed. â€Å"On the blocks with closed dispensaries, crime was 60% greater within a three-block radius, and 25% greater within a six-block radius than on the blocks with open dispensaries, according to the study† (Shaw, 2011, Study Show Lower Crime Rate). A Better Economy There are many ways legalizing marijuana can help the economy. Marijuana-related charges would fall significantly, saving US prisons nearly $1 billion annually. Ending prohibition laws against marijuana would save taxpayers $41. 8 billion annually. Marijuana growers in California account for $14 billion a year now that is legalized there. The selling of marijuana illegally is a $38 billion industry which is money our government is missing out on (Bradford, 2012, Boost the Economy). Physical Dangers to Users There are many studies that show marijuana use can greatly impair a user’s motor skills. They have shown that these impairments lead to a much higher rate of vehicle accidents even though people think being high has nothing to do with it. Studies have also shown that the constant inhalation of smoke, whether it is tobacco or marijuana, can lead to cancer. There has also been a link of marijuana use to psychosis, anxiety, and panic attacks (Lipkis, 2012, Impaired Driving Skills). A Worse Economy Polls show that many people do not believe legalizing marijuana would boost the economy. About a quarter of those polled said legalized pot would lead to more jobs in their communities; 57 percent said there would be no effect. About a third thinks the economy would improve, while 46 percent foresee no impact† (Grisling, 2010, Will NOT Boost Economy). In fact, many people think it will make things worse. This is because while marijuana dispensaries are favored, there are not many people that would invest in them. â€Å"If marijuana was decriminalized, more Americans favor private businesses selling it (54 percent) than the government (36 percent). But just 24 percent said they would be interested in investing in a company that sells pot† (Grisling, 2010, Will NOT Boost Economy). Conclusion The legalization of marijuana is, in our opinion, a good thing. Many people have benefitted from using marijuana even if there are some undesirable side effects. Moderation is something that needs to be applied. Whether it be marijuana or even exercising, too much can hurt you. Recreational use is not what was discussed here. Improving upon the lives we are currently living, through the different applications of marijuana, is what we aimed to point out. How to cite Itt Tech Comp. Ii Final Paper, Essay examples

The Eyes of Poverty free essay sample

I attend one of the most privileged prep schools in the country and simultaneously live only a few miles away from one of the poorest cities. My mother works as a supervisor in that impoverished city, Camden, NJ, at an agency most commonly known as Welfare. My perspective, therefore, stems from a paradox of influences perhaps reflected best by our dinner conversations consisting of both destitute drug addicts and the latest high school gossip. This unique situation allows me insight into not only the triviality of my â€Å"problems†, but also the extent of my classmates’ ignorance about the immense issue of poverty. It is all too easy for my peers to sit back in their V-neck sweaters and pressed slacks and exclaim about the tax dollars wasted on the nation’s poor. Of course, these complaints come loudest from the kids who have not worked a day in their lives, whose Daddies bought them Mercedes before they could even drive worth more than what a welfare recipient might see in years. We will write a custom essay sample on The Eyes of Poverty or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page With each remark, I shoot back about the cycle of poverty, gang violence, addiction, disability, and mental illness, but inevitably, I end up bending my head and gritting my teeth in frustration. However despite these daily defeats, I continue to respond because I know something that they do not; that poverty has a name, a face, a family, and a story. For a few years now, my mother has especially advocated for a particular client, a homeless paranoid schizophrenic by the name of Mr. McKay. Mr. McKay has a family and a very caring, albeit aging mother who calls at least once a month to ask if her son has cashed his Welfare check, an indication that he is alive. She also sends cards for every holiday and birthday, cards that my mother dutifully hand delivers to Mr. McKay in the soup kitchen line if she has not seen him in a few days. Sometimes Mr. McKay turns up with a new bruise or gash, displaying to the world the immense impact his mind has had on his body, Though obviously suffering from overwhelming disabilities, he only receives minimal general assistance or minimal free handouts draining the country’s resources as my peers would so adeptly put it. Luckily, Mr. McKay does not take notice; he sleeps under the stars, in the rain, with the gang bangers bothering him for the contents of his garbage bag, with the voices in his head. I am fortunate enough to have had the unique pleasure of meeting Mr. McKay while volunteering at the soup kitchen one afternoon. Besides his gentle nature and gratitude, what jumped out at me about him from the layers of clothing and grime acquired from years of living on the streets was his piercing blue eyes, the same eyes that at an earlier point undoubtedly looked out at the world from a more functional and realistic perspective. I wondered then and wonder still if he experiences any moments of lucidity through those eyes and how he feels about what his life has become. I wonder if he ever worries about his mother who still has not given up on him or thinks about the teens sitting in their ironed clothes judging him and others like him in a prep school classroom just a few towns away. Poverty is more than an issue of choice or work ethic, it is an epidemic plaguing a nation of damaged individuals who need help, not judgment. I believe that empathy and education are indispensable parts of this so I refuse to stop responding, loudly, to the ignorance spewed in my social justice class, on television, and in daily conversation because I know the victims so flippantly dismissed: the teen mother, the lifelong drug addict, the unemployed father, and the schizophrenic man sleeping on a bench somewhere in Camden. I think of their mothers sending birthday cards and calling the Welfare office, wondering if this time, they will be told by a harried social worker that their son is dead. I think of their faces, faces that could be anyone’s, even yours or mine. I think of my own blue eyes staring back at me.

Add Math Essay 2 Essays

Add Math Essay 2 Essays Add Math Essay 2 Essay Add Math Essay 2 Essay Additional Mathematics Project Work 2 Written By : Nurul Hazira Syaza Abas I/C : 940602-01-6676 Angka Giliran : School : SMK Kangkar Pulai Copyright 2011  ©. Hazira Syaza, All Right Reserve Numb| Title| Page| 1| Acknowledge| 1| 2| Objective| 2| 3| Introduction Part I| 3| 4| Mathematics In Cake Baking And Cake Decorating| 4 5| 5| Part II| 6 14| 6| Part III| 15 17| 7| Further Exploration| 18 21| 8| Reflection| 22 23| 9| Conclusion| 24| 10| Reference| 25| Table. of. Content Copyright 2011  ©. Hazira Syaza, All Right Reserve Acknowledge First of all, I would like to say Alhamdulillah, for giving me the strength and health to do this project work. Not forgotten my parents for providing everything, such as money, to buy anything that are related to this project work and their advise, which is the most needed for this project. Internet, books, computers and all that. They also supported me and encouraged me to complete this task so that I will not procrastinate in doing it. Then I would like to thank my teacher, Puan Andek for guiding me and my friends throughout this project. We had some difficulties in doing this task, but he taught us patiently until we knew what to do. He tried and tried to teach us until we understand what we supposed to do with the project work. Last but not least, my friends who were doing this project with me and sharing our ideas. They were helpful that when we combined and discussed together, we had this task done. Copyright 2011  ©. Hazira Syaza, All Right Reserve 1 Objective The aims of carrying out this project work are: * To apply and adapt a variety of problem-solving strategies to solve problems * To improve thinking skills * To promote effective mathematical communication To develop mathematical knowledge through problem solving in a way that increases students’ interest and confidence * To use the language of mathematics to express mathematical ideas precisely * To provide learning environment that stimulates and enhances effective learning * To develop positive attitude towards mathematics Copyright 2011  ©. H azira Syaza, All Right Reserve 2 Introduction Part 1 Cakes come in a variety of forms and flavours and are among favourite desserts served during special occasions such as birthday parties, Hari Raya, weddings and others. Cakes are treasured not only because of their onderful taste but also in the art of cake baking and cake decorating Baking a cake offers a tasty way to practice math skills, such as fractions and ratios, in a real-world context. Many steps of baking a cake, such as counting ingredients and setting the oven timer, provide basic math practice for young children. Older children and teenagers can use more sophisticated math to solve baking dilemmas, such as how to make a cake recipe larger or smaller or how to determine what size slices you should cut. Practicing math while baking not only improves your math skills, it helps you become a more flexible and resourceful baker. Copyright 2011  ©. Hazira Syaza, All Right Reserve 3 MATHEMATICS IN CAKE BAKING AND CAKE DECORATING GEOMETRY To determine suitable dimensions for the cake, to assist in designing and decorating cakes that comes in many attractive shapes and designs, to estimate volume of cake to be produced When making a batch of cake batter, you end up with a certain volume, determined by the recipe. The baker must then choose the appropriate size and shape of pan to achieve the desired result. If the pan is too big, the cake becomes too short. If the pan is too small, the cake becomes too tall. This leads into the next situation. The ratio of the surface area to the volume determines how much crust a baked good will have. The more surface area there is, compared to the volume, the faster the item will bake, and the less inside there will be. For a very large, thick item, it will take a long time for the heat to penetrate to the center. To avoid having a rock-hard outside in this case, the baker will have to lower the temperature a little bit and bake for a longer time. We mix ingredients in round bowls because cubes would have corners where unmixed ingredients would accumulate, and we would have a hard time scraping them into the batter. Calculus (DIFFERENTIATION) To determine minimum or maximum amount of ingredients for cake-baking, to estimate min. or max. amount of cream needed for decorating, to estimate min. or max. Size of cake produced. Copyright 2011  ©. Hazira Syaza, All Right Reserve 4 PROGRESSION To determine total weight/volume of multi-storey cakes with proportional dimensions, to estimate total ingredients needed for cake-baking, to estimate total amount of cream for decoration. For example when we make a cake with many layers, we must fix the difference of diameter of the two layers. So we can say that it used arithmetic progression. When the diameter of the first layer of the cake is 8? nd the diameter of second layer of the cake is 6? , then the diameter of the third layer should be 4?. In this case, we use arithmetic progression where the difference of the diameter is constant that is 2. When the diameter decreases, the weight also decreases. That is the way how the cake is balance to prevent it from smooch. We can also use ratio, because when we prepare the ingredient for each layer of the cake, we need to decrease its ratio from lower layer to upper layer. When we cut the cake, we can use fraction to devide the cake according to the total people that will eat the cake. Copyright 2011  ©. Hazira Syaza, All Right Reserve 5 Part 11 Best Bakery shop received an order from your school to bake a 5 kg of round cake as shown in Diagram 1 for the Teachers’ Day celebration. 1) If a kilogram of cake has a volume of 38000cm3, and the height of the cake is to be 7. 0 cm, the diameter of the baking tray to be used to fit the 5 kg cake ordered by your school 3800 is Volume of 5kg cake = Base area of cake x Height of cake 3800 x 5 = (3. 142)( d/2)? x 7 1900/7 (3. 142) = ( d/2)? 863. 872 = (d/2 )? d/2 = 29. 392 d d = 58. 784 cm Copyright 2011  ©. Hazira Syaza, All Right Reserve 2) The inner dimensions of oven: 80cm length, 60cm width, 45cm height a) The formula that formed for d in terms of h by using the formula for volume of cake, V = 19000 is: 19000 = (3. 142)(d/2)(d/2)   ? h 1900/(3. 142)2 = d   ? /4 24188. 415/h = d   ? d = 155. 53/ h Copyright 2011  ©. Hazira Syaza, All Right Reserve 7 Height,h| Diameter,d| 1. 0| 155. 53| 2. 0| 109. 98| 3. 0| 89. 79| 4. 0| 77. 76| 5. 0| 69. 55| 6. 0| 63. 49| 7. 0| 58. 78| 8. 0| 54. 99| 9. 0| 51. 84| 10. 0| 49. 18| Table 1 b) i) h 7cm is NOT suitable, because the resulting diameter produced is too large to fit into the oven. Furthermore, the cake would be too short and too wide, making it less attractive. b) ii) The most suitable dimensions (h and d) for the cake is h = 8cm, d = 54. 99cm, because it can fit into the oven, and the size is suitable for easy handling. c) i) The same formula in 2(a) is used, that is 19000 = (3. 142)( )? h. The same process is also used, that is, make d the subject. An equation which is suitable and relevant for the graph: Copyright 2011  ©. Hazira Syaza, All Right Reserve 8 1900= (3. 1420(d/2)   ? h 119000/(3. 142)h = d   ? /4 24188. 415/h = d   ? d = 155. 53/ vh d = 155. 53h(1-/? ) log d = log 155. 3h(-1/? ) log d = (-1/? )log h + log 155. 53 Table of log d = (-1/? )log h + log 155. 53 Height,h| Diameter,d| Log h| Log d| 1. 0| 155. 53| 0. 00| 2. 19| 2. 0| 109. 98| 0. 30| 2. 04| 3. 0| 89. 79| 0. 48| 1. 95| 4. 0| 77. 76| 0. 60| 1. 89| 5. 0| 69. 55| 0. 70| 1. 84| 6. 0| 63. 49| 0. 78| 1. 80| 7. 0| 58. 78| 0. 85| 1. 77| 8. 0| 54. 99| 0. 90| 1. 74| 9. 0| 51. 84| 0. 95| 1. 71| 10. 0| 49. 18| 1. 0| 1. 69| Table 2 Copyright 2011  ©. Hazira Syaza, All Right Reserve 9 Graph of log d against log h Copyright 2011  ©. Hazira Syaza, All Right Reserve 10 ii) Based on the graph: a) d when h = 10. 5cm h = 10. 5cm, log h = 1. 21, log d = 1. 680, d = 47. 86cm b) h when d = 42cm d = 42cm, log d = 1. 623, log h = 1. 140, h = 13. 80cm 3) The cake with fresh cream, with uniform thickness 1cm is decorated a) The amount of fresh cream needed to decorate the cake, using the dimensions Ive suggested in 2(b)(ii) My answer in 2(b)(ii) ==; h = 8cm, d = 54. 99cm Amount of fresh cream = volume of fresh cream needed (area x height) Amount of fresh cream = volume of cream at the top surface + volume of cream at the side surface The bottom surface area of cake is not counted, because were decorating the visible part of the cake only (top and sides). Obviously, we dont decorate the bottom part of the cake Volume of cream at the top surface = Area of top surface x Height of cream = (3. 142)(54. 99/2) ? )x 1 = 2375 cm? Volume of cream at the side surface = Area of side surface x Height of cream = (Circumference of cake x Height of cake) x Height of cream = 2(3. 142)( 54. 99/2)(8) x 1 = 1382. 23 cm? Therefore, amount of fresh cream = 2375 + 1382. 23 = 3757. 23 cm? Copyright 2011  ©. Hazira Syaza, All Right Reserve 11 c) Three other shapes (the shape of the base of the cake) for the cake with same height which is depends on the 2(b)(ii) and volume 19000cm? The volume of top surface is always the same for all shapes (since height is same), My answer (with h = 8cm, and volume of cream on top surface =1900/8 = 2375 cm? ) 19000 = base area x height base area = 1900/8 length x width = 2375 By trial and improvement, 2375 = 50 x 47. 5 (length = 50, width = 47. 5, height = 8) Therefore, volume of cream = 2(Area of left and right side surface)(Height of cream) + 2(Area of front and back side surface)(Height of cream) + volume of top surface = 2(50 x 8)(1) + 2(47. 5 x 8)(1) + 2375 = 3935 cm? Copyright 2011  ©. Hazira Syaza, All Right Reserve 12 Triangle-shaped base 19000 = base area x height base area = 1900/8 base area = 2375 x length x width = 2375 length x width = 4750 By trial and improvement, 4750 = 95 x 50 (length = 95, width = 50) Slant length of triangle = v (95? + 25? )= 98. 23 Therefore, amount of cream = Area of rectangular front side surface(Height of cream) + 2(Area of slant rectangular left/right side surface)(Height of cream) + Volume of top surface = (50 x 8)(1) + 2(98. 23 x 8)(1) + 2375 = 4346. 68 cm? Copyright 2011  ©. Hazira Syaza, All Right Reserve 13 3 – Pentagon Shaped Base 19000 = base area x height ase area = 2375 = area of 5 similar isosceles triangles in a pentagon therefore: 2375 = 5(length x width) 475 = length x width By trial and improvement, 475 = 25 x 19 (length = 25, width = 19) Therefore, amount of cream = 5(area of one rectangular side surface)(height of cream) + vol. of top surface = 5(19 x 8) + 2375 = 3135 cm? c) Based on the values above, the shape that require the least amount of fresh cream to be used is: Pentagon-shaped cake, since it requires only 3135 cm? of cream to be used. Copyright 2011  ©. Hazira Syaza, All Right Reserve 14 Part III When theres minimum? or maximum? well, theres differentiation and quadratic functions. The minimum height, h and its corresponding minimum diameter, d is calculated by using the differentiation and function. Method 1: Differentiation Two equations for this method: the formula for volume of cake (as in 2(a)), and the formula for amount (volume) of cream to be used for the round cake (as in 3(a)). 19000 = (3. 142)r? h (1) V = (3. 142)r? + 2(3. 142)rh (2) From (1): h =19000/(3. 142)r? (3) Sub. (3)into (2): V=(3. 142)r? +2(3. 142)r(19000/(3. 142)r? ) V=(3. 142)r? +(38000/r) V=(3. 142)r? +38000r-1 (dV/dr)=2(3. 142)r-(38000/r? ) 0=2(3. 142)r-(38000/r? minimun value therefore dv/dr=0 38000/r? =2(3. 142)r 38000/2(3. 142)=r^3 6047. 104=r^3 R=18. 22 Sub. r = 18. 22 into (3) H=19000/(3. 142)(18. 22) Therefore,h = 18. 22cm,d=2r=2(18. 22)=36. 44cm Copyright 2011  ©. Hazira Syaza, All Right Reserve 15 Method 2 : Quadratic Functions Two same equations as in Method 1,but only the formula for amount of cream is the main equation used as the quadratic functions. Let f(r)=volume of cream,r = radius of round cake: 19000 = (3. 142)r ? h (1) F(r)=(3. 142)r ? +2(3. 142)hr (2) From (2): F(r) = (3. 142)(r ? +2hr) factorize (3. 142) = (3. 142)[(r+2h/2) ? (2h/2) ? ] completing square,with a =(3. 142),b=2h and c=0 = (3. 142)[(r+h) ? -h ? ] = (3. 142)(r+h) ? -(3. 142)h ? (a=(3. 142)(positive indicates min. value),min. value = f(r)=-(3. 142)h ? ,corresponding value of x = r = -h) Sub. r =-h into (1): 19000=(3. 142)(h) ? h h^3=6047. 104 h=18. 22 Sub. h=188. 22 into (1) 19000=(3. 142)r ? (18. 22) r ? =331. 894 r=18. 22) therefore,h=18. 22cm,d=2r=2(18. 22)=36. 44cm Copyright 2011  ©. Hazira Syaza, All Right Reserve 16 I would choose not to bake a cake with such dimensions because its dimensions are not suitable (the height is too high) and therefore less attractive. Furthermore, such cakes are difficult to handle easily. Copyright 2011  ©. Hazira Syaza, All Right Reserve 17 Futher Exploration Copyright 2011  ©. Hazira Syaza, All Right Reserve 18 Best Bakery received an order to bake a multi-storey cake for Merdeka Day celebration, as shown in Diagram 2. The height of each cake is 6. 0 cm and the radius of the largest cake is 31. 0 cm. The radius of the second cake is 10% less than the radius of the first cake, the radius of the third cake is 10% less than the radius of the second cake and so on. Given: height, h of each cake = 6cm radius of largest cake = 31cm adius of 2nd cake = 10% smaller than 1st cake radius of 3rd cake = 10% smaller than 2nd cake 31, 27. 9, 25. 11, 22. 599,†¦ a = 31, r = 9/10 V = (3. 142)r? h, a) By using the formula for volume V = (3. 142)r? h, with h = 6 to get the volume of cakes. Volume of 1st, 2nd, 3rd, and 4th cakes: Copyright 2011  ©. Hazira Syaza, All Right Reserve 19 Radius of 1st cake = 31, volume of 1s t cake = (3. 142)(31)? (6) = 18116. 772 Radius of 2nd cake = 27. 9, 9, volume of 2nd cake = (3. 142)(27. 9)? (6) 14674. 585 Radius of 3rd cake = 25. 11, Radius of 4th cake = 22. 59 volume of 3rd cake = (3. 42)(25. 11)? (6) 11886. 414 , volume of 4th cake = (3. 142)(22. 599)? (6) 9627. 995 The volumes form number pattern: 18116. 772, 14674. 585, 11886. 414, 9627. 995,†¦ (it is a geometric progression with first term, a = 18116. 772 and ratio, r = T2/T1 = T3 /T2 = †¦ = 0. 81) b) The total mass of all the cakes should not exceed 15 kg ( total mass ; 15 kg, change to volume: total volume ; 57000 cm? ), so the maximum number of cakes that needs to be baked is Copyright 2011  ©. Hazira Syaza, All Right Reserve 20 Sn =(a(1-rn))/(1-r) Sn = 57000, a = 18116. 772 and r = 0. 81 57000 =(18116. 22(1-(0. 81)n))/(1-0. 81) 1 0. 81n = 0. 59779 0. 40221 = 0. 81n og0. 81 0. 40221 = n n=log0. 40221/log0. 81 n = 4. 322 therefore, n ~ 4 Verifying the answer: When n = 5: S5 = (18116. 772(1 ( 0. 81)5)) / (1 0. 81) = 62104. 443 ; 57000 (Sn ; 57000, n = 5 is not suitable) When n = 4: S4 = (18116. 772(1- (0. 81)4)) / (1 -0. 81) = 54305. 767 ; 57000 (Sn ; 57000, n = 4 is suitable) Copyright 2011  ©. Hazira Syaza, All Right Reserve 21 Reflection Copyright 2011  ©. Hazira Syaza, All Right Reserve 22 TEAM IS IMPORTANT! BE HELPFUL ALWAYS READY TO LEARN NEW THINGS BE A HARDWORKING STUDENT Copyright 2011  ©. Hazira Syaza, All Right Reserve 23 CONCLUSION * Geometry is the study of angles and triangles, perimeter, area and volume. It differs from algebra in that one develops a logical structure where mathematical relationships are proved and applied. * An arithmetic progression (AP) or arithmetic sequence is a sequence of numbers such that the difference of any two successive members of the sequence is a constant * A geometric progression, also known as a geometric sequence, is a sequence of numbers where each term after the first is found by multiplying he previous one by a fixed non-zero number called the common ratio * Differentiation is essentially the process of finding an equation which will give you the gradient (slope, rise over run, etc. ) at any point along the curve. Say you have y = x^2. The equation y = 2x will give you the gradient of y at any point along that curve. Copyright 2011  ©. Hazira Syaza, All Right Reserve 24 REFERENC E * Wikipedia * one-school. net/ * Additional Mathematics text book form 4 and form 5 Copyright 2011  ©. Hazira Syaza, All Right Reserve 25

7 money habits to master in your 20s

7 money habits to master in your 20s It’s never too early to start making smarter financial decisions. With any luck, you’ve already begun a good fiscal regime for yourself in your twenties and are now cultivating the good habits you’ll need to be solvent as you progress in your life and your career. If you haven’t begun yet and are nearing your thirtieth  birthday, it’s not too late to start. Begin by folding some or all of the following 7 practices into your life- your future self will thank you for it. 1. Create a budgeting plan.You may have gone to the trouble of drawing up a budget or downloading an app to help you keep on the financial straight and narrow, but that won’t do any good if you don’t actually use them. Use the tool that you like the best to make sure you’re not spending more than you’re earning. Part of your budget should include a set minimum of earnings you’re confident you can squirrel away every month.2. Pay down debt.The avera ge American grad owes over $37,000 in student loans and the average household owes over $8,000 on their credit cards, so don’t feel alone if you’ve accumulated some debt. Just make a point of paying it down as aggressively and early as possible to avoid paying twice the original amount later in life. This will likely take a fair share of effort and a whole lot of self-control. You might have to skip drinks out, scale back on your vacations, or even getting a second job, but in the end you’ll be glad you didn’t put off paying off your debt.3. Don’t blow every paycheck.It’s hard when rent and bills knock your paycheck down to almost nothing, but you must resist the urge to think of the remainder as fun money. Try to boil your necessities down to a small number and put the rest away in savings. If you can start saving 10% of every check now, you’ll be golden. Remember, you’re saving for the long term.4. Cook for yourself.If you su ccumb to the lure of take-out lunches or dinners more than one or two times a week, you’re spending a ton of unnecessary cash. Add the costs of your restaurant meals one week and take a good hard look at the total.  Part of budgeting involves allotting a weekly amount to spend on food. If your dining out costs exceed a sensible weekly total, you’ll need to cut back. Your dollar will stretch much further when you cook for yourself with fresh, whole foods: think vegetables, grains, pasta, and beans.5. Splurge on the items that matter.There are plenty of things you will want to go budget on, but there are some items for which you really should pay a bit extra. Purchasing a cheap piece of furniture may seem like a smart move- until it falls apart in a year or two and you end up having to spend even more on a replacement. Shopping for quality will likely save you money in the long run, so look for furniture that won’t fall apart, energy-saving appliances you wonâ⠂¬â„¢t have to replace or pay extra for on your utility bill, and a car that won’t conk out after a year.6. Save for retirement.You should have long-term monetary goals for savings and growth. If you don’t, come up with some. Talk to a financial planner or open a money market account. And don’t forget to start putting away the maximum amount possible every year towards your retirement as soon as you have that flexibility. For most people, the times of sticking with a company for 25 years and getting a pension are long gone. You’ll have to look out for yourself.7. Be happy where you are.Coveting other people’s shiny things or fancy houses can lead to unrealistic goals and cause you to spend money on things you don’t really need. If you spend your hard-earned money on things beyond your means to keep up with an unattainable image, you’ll end up broke and unhappy. Create your own ideals, and know that it might take many, many years to re ach them. And that’s okay! You never know how friends with fabulous Instagram lives get their money- don’t assume that you’re behind if you don’t match up. Keep your eyes on your own life and financial journey.

How well does insurance contract regulation work Research Paper

How well does insurance contract regulation work - Research Paper Example An insurance policy is documented properly and the insured is handed over a contract which signifies the terms and conditions under which the insurance policy will be processed and the circumstances under which the financial compensation will be carried out1. Insurance has gained wide popularity after big global incidents and financial crises such as the 9/11 catastrophe and the financial meltdown of 2008/09. These events have spread a wing of insecurity among people in many areas of their lives, be it their life, their finances, their property or their relatives. This has escalated the demand of insurance all over the world and insurance companies have shown fruitful results in their financial statements. To have a clear and comprehensive description and analysis of insurance and its operation, the economics of insurance have to be taken into account and the understanding of insurance law and insurance contract regulation and its working is essential2. As every law in the world, there is a separate and credible law for insurance. Insurance law is a name designated towards the acts of law covering insurance comprising of insurance claims and policies. It contains all the principles of insurance including claim technicalities, compensation conditions, policy termination circumstances, indemnity, so on and so forth. Insurance law is based mainly on Insurance Contracts Regulations 1985 which have been established using the Insurance Contracts Act 1984. The presence and importance of insurance contracts regulations is utmost and considering a serious and delicate contract like insurance, a set of stringent regulations based on solid laws must be existent and implementable3. Insurance contracts regulations assist in numerous ways to the insurer as well as the insured and it created a specific, planned, professional progress way for the insurance policy throughout its tenor. As mentioned above about the

Breast Cancer research paper Essay Example | Topics and Well Written Essays - 1500 words

Breast Cancer research paper - Essay Example Breast cancers can develop in one or both breasts and are typically classified as either invasive or noninvasive. Non-invasive cancers are also known as in situ cancers because they are confined to a specific site in the body. Invasive cancers have the ability to spread throughout the body. Patients with breast cancer will typically come in for treatment complaining of increased breast pain, unusual lumps felt under the skin, and/or nipple discharge when not lactating. Although these symptoms are often caused by benign, or non-cancerous, processes, it is imperative that an accurate evaluation is made of the patient’s condition to rule out the possibility of cancer. â€Å"In one study, 16 percent of women between ages 40 and 69 came to the doctor with breast complaints over a 10-year period.† (Barton, 1999) It is for this reason that evaluation of breast complaints and screening for breast cancer account for a large proportion of the primary physician’s case load and will remain a significant part of the primary care practice. Although there are an estimated 190,000 women in the United States diagnosed with breast cancer every year, the number of women receiving screening mammography as recommended continues to vary between only 72 and 81 percent. These numbers reflect the number of insured women who receive the recommended care of receiving mammography screening between the ages of 50 and 64 at least every two years, more frequently when additional risk factors have been identified. It goes without saying that uninsured women receive less preventative care. Despite this, breast cancer mortality has declined gradually over the past decade to about 40,000 per year. (Bloom, et. al, 2000) ‘Screening’ is performed when there are no signs or symptoms of illness as a precautionary measure in women with high risk factors or women within the recommended age group. When symptoms are present, such as breast pain, lumps and nipple discharg e, evaluation procedures may require going a bit beyond the simple screening procedures. Even after a history of risk factors has been established and an examination focused on the specific complaint have been completed, ruling at most benign disorders as being the cause of complaint, treatment may still need to take place to remove the issues caused by the benignity. If cancer is suggested following these tests, discussions with the patient regarding diagnostic modalities – imaging, aspiration or biopsy – should be discussed during the office visit. Because breast cancer manifests itself in a variety of ways, differing in histologic, biologic and immunologic characteristics from patient to patient, this clinical evaluation may lead to referral of the patient to more advanced studies. As discussed in the previous section, breast masses can be placed into different categories, many of which are benign. Overall, cancerous lumps differ in many ways from benign lumps. They are much harder than benign masses; they are also fixed and stationary while benign lumps are more movable. Identifying of five risks through nursing assessment Although women with genetic dispositions for breast cancer are typically aware of the risks involved and strive to keep up to date with screening and regular

Chronic Kidney Disease

Chronic Kidney Disease Chronic conditions have been defined as â€Å"health problems that require ongoing management over a period of years or decades† and have been labelled as the biggest challenge faced by the health sector in the 21st century (WHO, 2002:11). While the economic cost of managing them is high, Suhrcke, Fahey McKee (2008) identify some strong economic arguments that may be made in support of the need for societies to invest in their (chronic diseases) management. They identify some primary benefits such as improved health (in terms of patients quantity and quality of life in years), long-term cost savings from complications that are prevented, and workplace productivity experienced by patients and their employers. Management of such conditions are no longer evaluated by the rates of survival alone but, also, by the quality of life experienced by patients as a result of the therapy (Bowling, 2005) Chronic Kidney Disease (CKD) is becoming a global pandemic (Mahon, 2006; Chen, Scott, Mattern, Mohini Nissenson, 2006; Clements Ashurst, 2006). The disease causes gradual decline in kidney function (Silvestri, 2002). It has been categorised into 5 stages according to the glomerular filtration rates (Johnson Usherwood, 2005) and the progression through these stages is influenced by several processes, mostly lifestyle-related (Riegersperger Sunder-Plassmann, 2007). Patients with stage 5 kidney disease (end stage) must receive kidney transplant, peritoneal dialysis or haemodialysis to survive (Niu Li, 2005). However, Wu et al. (2004) identifies that many patients undergo either haemodialysis or peritoneal dialysis because kidneys are, mostly, not available for transplant. Between these two treatment methods, haemodialysis is more common in many countries (Jablonski, 2007; Zhang et al., 2007; Martchev, 2008) although Carmichael et al. (2000) report that about 50% of dialysis patient s in the United Kingdom are on some form of peritoneal dialysis. The two common treatment modalities for kidney failure (haemodialysis and peritoneal dialysis) have the same primary purposes: to remove metabolic waste and excess fluids, and maintain fluid and electrolyte balance the functions the kidneys have failed to perform (Martchev, 2008; Timmers et al, 2008). However, each of them places unique demands on the patient as well as the healthcare team. For instance, patients on conventional haemodialysis have to spend between three to four hours on the machine for three times in a week (Rayment Bonner, 2007; Dunn, 1993). This, in addition to transportation to and from the haemodialysis centre or hospital, if they are not on home haemodialysis, affects their work or family life (Martchev, 2008). Likewise, patients on continuous ambulatory peritoneal dialysis (CAPD), the most common form of peritoneal dialysis, have to allow dialysate to dwell within their peritoneal cavity for an average of four hours and exchange of the dialysate is done about four times in a day (Dunn, 1993; Bowman Martin, 1999; Gonzalez-Perez et al., 2005). Moreover, compliance to dialysis regimen is very difficult because of all the dietary and fluid restrictions and other lifestyle modification associated with it (Cleary Drennan, 2005; Timmers et al., 2008; Martchev, 2008). Presently, more than 23,000 adults in the UK undergo dialysis treatment as a result of kidney failure and this number is expected to increase yearly (World Kidney Day, 2009). Korle-Bu Teaching Hospital (Ghana) recorded 558 cases of chronic kidney disease between January 2006 and July 2008 in the country (All Africa, 2009) and this may represent less than 30% of the total disease burden as the hospital serves a few regions in the country. I once encountered a 27-year old young man who had been diagnosed with kidney failure. At that point in time, my concern was the kind of life he would experience depending on dialysis for survival. Cleary and Drennan (2005) identifies that patients with kidney failure have lower quality of life than the general healthy population while Loos et al. (2003), also, identify that patients with kidney failure have poor quality of life as compared to other patients with other chronic diseases. Complications such as anaemia and fatigue may contribute to the lower quality of life in patients with kidney failure (Phillips, Davies White, 2001). Therefore, management of kidney failure should not only be cost-effective, but should also provide acceptable quality of life for the patients (Kring Crane, 2009). How, then, can health professionals provide an acceptable quality of life for persons diagnosed with kidney failure? Major roles played by health care personnel include educating, encouragin g, and assisting patients to choose the treatment modality that is best for their unique needs (Niu Li, 2005). It is, therefore, appropriate for nurses to know which of the two kinds of treatment modalities promises an acceptable quality of life for individual patients, and this knowledge should be supported by appropriate evidence gathered through quality research. In the 21st century, patients feelings and perceptions on health care are paramount to the feelings and perceptions of the health care providers (Bowling, 2005). Therefore, studying the quality of life, as experienced by patients on a specific regimen, requires the direct, subjective assessments of the patients and not the objective assessment of the health care provider (Kring Crane, 2009). However, quality of life lacks a unanimous definition as a concept, making interpretation and synthesis of studies on it very difficult (Cleary Drennan, 2005; Kring Crane, 2009). Researchers and theorists have reached a consensus on some characteristics of quality of life as a concept: it is multidimensional, temporal and subjective (Bredow, Peterson Sandau, 2009). The multidimensional aspect of the concept comprises of the physical, psychological and social capabilities of the person (McDowell, 1996 cited by Fortin et al., 2004). It is temporal because people can change their values and perc eptions to fix the changes in their perceived quality of life as circumstances change (Sprangers Schwartz, 1999). It is subjective because, as stated earlier, patients perceptions and feelings on such an outcome supersede that of the health care provider. Nevertheless, Tobita and Hyde (2007) states that there are some objective measures such as age and gender that can influence the measurement of quality of life. Different subjective tools have, therefore, been developed to measure subjective aspects of quality of life but these are of two kinds: generic and disease-specific measures (Tobita Hyde, 2007). Generic tools measure broad aspects and can be used for several types of diseases at different locations and for different cultural groups while disease-specific tools are for specific types of diseases or patient groups (Patrick Deyo, 1989). When the two kinds of tools are combined, different populations can be compared and sensitivity to the changes that might occur with time is enhanced (Wu et al., 2004). The generic tool that is commonly used to measure quality of life is the Medical Outcomes Study Questionnaire 36-Item Short Form Health Survey (SF-36) (Neto et al., 2000; Fortin et al., 2004; Morsch, Gonà §alves Barros, 2006). Carmichael et al. (2000) identify that three disease-specific measures have been designed for dialysis patients and these are Kidney Disease Questionnaire (KDQ) , a questionnaire designed by Parfrey et al. and the Kidney Disease Quality of Life questionnaire (KDQOL). Polaschek (2003) identifies that most of the studies that have been undertaken to explore the quality of life of patients with kidney failure have used the quantitative approach. However, he adds that a few nursing studies have used qualitative methodologies in an attempt to understand the quality of life as experienced by patients on dialysis. For example, Al-Arabi (2006) used the naturalistic enquiry method to identify how the challenges faced by patients with kidney failure influence their quality of life. Sadala and Loreà §on (2006) also used a phenomenological approach to explore patients perspective on their dependence on haemodialysis machines for survival. Grounded theory approach has, also, been used Kaba et al. (2007) to understand patients experience of kidney failure and dialysis in Greece. So far, this essay has addressed the poorer quality of life experienced by patients with chronic conditions, with special emphasis on that of patients with kidney failure. It has, also, touched on the attempts made by theorists and researchers to conceptualise and assess quality of life. Development of tools to measure subjective quality of life has created more diversity in the assessment of quality of life of patients, either by the use of quantitative or qualitative methodologies. It has been stated earlier that nurses and other health personnel assist patients in choosing the treatment modality that is best for their condition with the best available evidence. Therefore, the question for healthcare providers to answer is ‘does peritoneal dialysis, compared to haemodialysis, provide a better quality of life for patients with kidney failure? The next section would look at ways by which health care providers can use research to generate answers to the above question. This section would critically appraise various research methods that could be employed to answer my research question does peritoneal dialysis, compared to haemodialysis, provide a better quality of life for patients with kidney failure? Empirical research, audit/service evaluation and systematic review of published studies are the approaches that would be considered in this essay Empirical Research Qualitative and quantitative designs could be used to answer the above research question. However, steps to control bias and to ensure reliability of the findings should be considered (Polit Cheryl, 2008). Consideration should also be given to ethical issues (Robson,..) Qualitative research is the best approach when questions on ‘what, ‘how and ‘why on a phenomenon are to be answered (Green Thorogood, 2004). Some of the research traditions that are used in qualitative studies include ethnography, phenomenology and grounded theory (Polit Cheryl, 2008). To understand quality of life, as experienced by dialysis patients from their own perspective, phenomenological approach appears to be more appropriate. Polit and Cheryl (2008) identify that phenomenological study focuses on the meaning and importance attached to a phenomenon by those experiencing it and suggest that this approach is beneficial for studies on concepts that have been poorly defined, such as quality of life. If phenomenological approach is used for my research question, I would interview dialysis patients on how kidney failure and dialysis have affected their quality of life, after obtaining their informed consent for the study. However, Ashworth (1996) states that researchers using descriptive phenomenological approach by Husserl should set aside all their preconceptions on the phenomenon that is being studied (bracketing). For instance, now that I know that dialysis patients have a poorer quality of life, as compared to other patients with other chronic diseases or the general healthy population, I should be able to set such an idea aside during the collection and analysis of data. But Polit and Cheryl (2008) identify that researchers using interpretive phenomenology approach by Heideggar acknowledge that bracketing is not possible in empirical studies. Nevertheless, both types of phenomenological studies require the researcher to be open to all meanings that are given to a phenomenon by those experiencing it and maintain such an attitude when analysing the data and describing the findings. One limitation of phenomenology, however, is that small number of participants can be used for each distinctive phenomenological study, usually ten participants or less (Polit Cheryl, 2008). Phenomenology shares other limitations of qualitative research methods. Given (2006) identifies that qualitative research generate a lot of data, even when the sample size is small. He also states that collecting and analysing data may take a long time and results may not be generalised because of the small number of participants. Therefore, even though phenomenology and other qualitative methods may offer me rich and in-depth information on dialysis patients perspectives on their quality of life, a qualitative design may not be suitable to answer this research question for generalisation purposes.

Impacts from Space and Mass Extinction Events

Describe concept of faunal succession and use of fossils in correlation and in the subdivision of Earth history. -Principle of Faunal Succession: Strata of Eke age can be recognized by the fossils they contain even if the outcrops of strata are separated by large distances geographically, this only works because species have evolved through time C] older forms of life die out and new forms develop -using the appearance and disappearance of fossils to subdivide geological time Is the science of physiotherapyD. Recognize the qualities that make fossils useful in physiotherapy. – Physiotherapy: each fossil species is said to have a range through geological time 0 it exists in the geological record from the point that it evolves to the point that it becomes extinct E. Identify important historical figures in the development of stereography and physiotherapy. Archbishop of Armada, James Usher (1581-1665) calculated the Earth to be 6000 years old by adding up all the dates mentioned in the Bible and arrived at a date of October 22, 4004 BC as the creation of planet Earth (hard to accept by many people) -Late asses and asses scientists started to conclude that the Earth Is ancient and had undergone much change throughout Its history. This George Xavier (1769-1832) examined the remains of mammoths in Europe concluding they were a once living species that had become extinct F.Appreciate the scale of changes that can occur over geological time scales. – Geological time scale – to represent the changing character of the Earth through time, fossils were used to correlate between different regions and characterize particular periods of Earth's history -Today we have a time scale that divides and bedsides Earth's 4. 6 billion years into various time periods G. List some of the major subdivisions/ ages of the geological time scale and appreciate the relative scale between the Phonetics and the Precambrian.This is due to an extraordinary proliferation of f ossils at the base of the Phonetics in a period called the Cambrian. -Most creatures with hard parts like shells, teeth, and internal skeletons evolved here as they fossil much more readily than soft-bodied creatures -In addition to an increasing biodiversity as new species evolved, many of the new â€Å"hard part creatures† would more readily form fossils. H. Understand how extinction events are linked to the structure of the geological time call. Eras are broad subdivisions that are particularly significant as they represent a grouping of geological periods. They represent times when there has been a major change in the Earth's biosphere. -The base of the Phonetics is defined by the emergence of creatures with hard parts. -The base of the Mesozoic and the Cenozoic is based on the emergence of new species following a mass extinction at the top of the Paleozoic and Mesozoic respectively. -The base of all periods is defined on the emergence of radiation of new species l.List s ome of the major developments in the history of life on Earth. ) At least 30% of Earth's species must be lost 2) It must be across a broad range of geologies, not restricted to any one niche. 3) It must have short/sudden duration (around 1 million years maximum) K. List the â€Å"Big Five† mass extinction events and their order through time. 1) Cretaceous / Polygene (Tertiary) (K/Peg), 65 Ma 2) Late -errant's, 205 Ma 3) Perm / Triassic, 251 Ma 4) Late Devotion, 360-375 Ma 5. Late Ordination, 440-450 Ma L. Distinguish between broad extinction-producing phenomena. ) Biological causes: Organisms being brought together that once lived in isolation can cause mass extinctions (ex. Many of the New Zealand ground dwelling bird fauna were devastated when human hunters and then later European mammals (cats, rats, dogs) were introduced) -The three main modes of biologically induced extinctions: a. Competition between creatures occupying the same ecological niche b. (Excessive) Predation : Predators do not have to do the whole Job, Just drive a population to a low enough level then â€Å"random extinction† can complete the extinction.The idea behind a random extinction is that, although the number of individuals in a species may grow and the species may spread over a wide area, thing ensures the permanent survival of a species. C. Pathogens: disease being introduced to an area by incoming plants or animals 2) Earth-based causes: Extinctions influenced by Earth-based tectonic processes may be caused by changes in continental configuration or changes in atmospheric composition a. Changes in continental configuration: changes in the distribution of continents can have a profound effect.Two major effects of continental configurations: -Changes in climate, ocean cyclist, sea level. Weather patterns and the movement of the oceans are directly linked to the distribution of continents. The Late Ordination extinction -The greater the landmass the lower the diversity. At the moment we have a relatively high biodiversity. This is in part due to the number of continents that are in effect isolated from one another. In times when there is a high degree of continental fragmentation, evolution can proceed in isolation to produce many different species on different landmasses.If plate tectonics cause the formation of a large interconnected land mass there will be more competition between species and lower biodiversity. 0 The Perm/ Triassic Extinction b. Changes in the atmosphere: volcanic activity can also have severe effects. Gases such as carbon dioxide can cause greenhouse warming and aerosols may cause climatic cooling. These can significantly affect the health of the biota c. Extraterrestrial impacts d. Combination of many factors: it is very unlikely that any one factor would be responsible for a global crisis in the biosphere.M. Describe the late Ordination and Perm-Triassic extinction. -Late Ordination: Australia, moves towards the South Pole d uring the late Ordination causing a severe ice age. As water was locked up in the form of glaciers at the Southern Pole, sea level fell. This may have had a severe effect on creatures that live in the shallow water, lose to the continental margins. As the sea retreated off the continental shelf and into the ocean basis shallow marine ecosystems would have been devastated. The Perm / Triassic Extinction (the WORST day for the Biosphere, 251 Ma): At the end of the Permian, plate tectonics had brought all the continents together to form the super continent of Pangaea -Between 95-98% of all species would go into extinction -It hit both ocean- and land-based ecosystems and was less than 1 million years in duration -Many of the common Paleozoic marine creatures would suffer badly through this extinction including trilobites, barbershops, and crinoids.On land, large amphibians and mammal-like reptiles would be badly effected. -Potential causes of the Perm / Triassic extinction (involves a number of events happening at the same time): 1) Continental configuration: drop in biodiversity. The greater the landmass the greater the competition between species. At the end of the Permian, the superscription of Pangaea or â€Å"all lands† would have brought many species into direct competition. 2) Sea level fall: less ocean ridge activity.Sea floor spreading slowed its pace during the Permian, resulting that the oceanic ridges were smaller in size and displaced less water. Consequently oceans retreated from shallow areas into the deeper basin causing problems for creatures that lived in any remaining shallow marine environments. 3) Oceanic stagnation: The close of the formation of Pangaea saw the end of an ice age. Cold polar waters probably disappeared and ocean circulation slowed or stopped. This would have reduced ventilation of deep ocean waters killing off many deeper marine species.In addition occasional overturn of stagnant water could have brought oxygen poor wa ters to shallower marine communities as well. 4) Climate change: Due to the formation of a large landmass, limited would have been much drier and subject to drought. 5) Siberian Traps: massive volcanic activity in Russia: Around 2-3 million kamala basaltic lava were produced within a million years. Carbon dioxide from the volcanic activity and methane caused by melting of gas hydrates would have resulted in greenhouse warming of the planet.In addition, gas emission from volcanoes would have also produced acid rain effects. 6) Possible impacts: Although still very controversial, it is possible that the Earth suffered impacts from space during this time as well. N. Describe the character of extinctions at the K/Peg boundary. Just as the end of the Permian extinction marked the beginning of a new grouping of periods (the Mesozoic) the end of the Cretaceous extinction is likewise so distinct that it marks the beginning of the latest grouping of periods, the Cenozoic. Characteristics: 1) Over 50% of all species on the planet would go into extinction during the k/Peg extinction event 2) One land, few creatures over 25 keg in weight would survive 3) In general, the extinction was even more severe in the oceans with around 80-90% of marine species including the ammonites and marine reptiles going into extinction -A ether and son scientific team, Louis and Walter Olivarez brought the K/Peg extinction crosses the K/Peg boundary in Gobi, Italy.The I-CM clay layer lies directly on top of the latest Cretaceous rocks and was found to be enriched in the element iridium (very rare at the Earth's surface and yet in this layer was enriched over xx above background 0 has now been recorded in many other sections around the world that straddle the Cretaceous. Polygene boundary) -Iridium is known to exist in higher concentrations in extra-terrestrial objects such as asteroids. Olivarez suggested that he clay layer enriched in iridium has been produced by a meteor or comet over 10 k m in diameter impacting the Earth.He suggested further that this impact may have also been responsible for the extinction at the end of the Cretaceous. O. Discuss the evidence used to support the K/Peg impact. 1) Fern spores vs.. Pollen: Ferns are often the first plants to colonize a landscape that has been devastated by fire. In the earliest Polygene (part of what was formerly called the Tertiary), many areas show an increase in fern spores relative to pollen. This suggests that global forest fires may have raged at the end of the Cretaceous paving a landscape open for ferns to spread.This is further supported by high concentrations of soot found around the K/Peg boundary. 2) Tektites: they are thought to be produced during an impact event and they are composed of natural gas. During impact, rock is melted and ejected form the crater. As it travels through the air and cools, it forms characteristic aerodynamic shapes. Many tektites are found at the K/Peg boundary in many different locations, suggesting a massive impact event. 3) Shocked quartz: In many sections around the K/Peg boundary, fragments of the mineral quartz show evidence of multiple fractures.These fractures are thought to be produced when rock is shattered during a high-energy impact. The fragments are called shocked quartz. 4) Tsunami deposits: Tsunami waves leave characteristic sedimentary deposits on inundated shores and as far inland as the waves reach. This feature was found in Mexico, Texas, New Jersey, and the Carolinas suggesting the passage of an enormous wave, far larger than could have been produced by standard tectonic processes.Such a wave could have been generated if an impact had occurred in the ocean. P. Describe the location and probable nature of the K/Peg impact. The distribution of tektites, iridium, shocked quartz, and other potential impact related features was pointing towards a possible centre of activity in the Yucatan Peninsula of Mexico. An oil company had drilled wells in the area and encountered unusual fractures and even melted rock suggesting the area had been subjected to some form of extreme stress. The presence of a crater was finally confirmed when geophysical data revealed a large circular disturbance over km in diameter, the Clubbing Impact Crater -The object responsible for this crater had a shallow angle of entry around 0-30 degrees and is estimated to have been at least 10 km across. -As an analogy, you can think of something the size of Mount Everest hitting the surface of the planet. The energy released by the impact was equivalent to 6. Axes tons of TNT. An estimated 100 kamala of rock was vaporized and released to the atmosphere. Material that wasn't instantly vaporized was thrown out of the crater (the ejects) and Q.Describe the initial and long-term effects of the impact and their environmental consequences. 1) Initial effects (seconds to days) of the impact in the area of the Yucatan Peninsula were significant a. Everything clo se by would have been vaporized b. The intense heat form the blast and the hot debris (including tektites) would have started massive forest fires as suggested by the fern and pollen data c. As the impact occurred partly in the ocean, a massive tsunami would have been generated 2) Longer-term effects (months to decades) of the impact were numerous.Two significant effects were on global temperature and on atmospheric composition. A. Global temperature changes -Dust thrown into the atmosphere would have shut off sunlight for weeks or perhaps months generating a period of cold (a â€Å"Cold House†, lasting weeks to months. The lack of sunlight would also have had severe consequences for plants and photosynthetic algae. -After the dust had settled, water vapor would have remained in the atmosphere acting as a blanket, preventing heat from escaping the Earth. This would have created a greenhouse effect and caused a rise in global temperature. Eventually the excess water vapor woul d be removed by rainfall. However, the temperature of the Earth would continue to rise due to the release of greenhouse gases during impact (a â€Å"Hot House†), lasting years to decades. In particular, carbon dioxide would have been liberated when large quantities of limestone (calcium carbonate, Cacao) would have vaporized during the impact. -The Mesozoic had in general been a warm equable environment. These swings in temperature would have laced a lot of stress on creatures more used to stable climatic conditions. . Acid Rain -High-energy blasts can cause oxygen to combine with nitrogen to form oxides of nitrogen. When these are dissolved in water (ex. Rainfall), it becomes nitric acid. -In addition to the vaporization of limestone as described in (a) above, rocks called evaporates were also vaporized in the blast. Evaporates form when salts precipitate out of solution as the sun evaporates a body of water. This can occur on a vast scale, for example in the Mediterranean S ea, which is closed off at the Strait of Gibraltar.With virtually no input of water from the Atlantic Ocean, high rates of evaporation resulted in the Sea being converted into a vast sultan. This process had also occurred in the Yucatan area. The effect of high-energy blasts on sulfate-rich evaporates is the release of large amounts of sulfur gases. These gases, when dissolved in rainwater, fall to Earth as sulfuric acid. Although the acidity of the nitric- and sulfuric- containing rain was weak and could probably not affect any large animals directly, they would have been affected the acidity of soil and surface ocean.This would have had a devastating effect on plant life and plankton. Thus, the effects from acid rain on the organisms that form the base of the food chain or food web had serious repercussions for all the creatures at higher atrophic levels. R. Consider other potential causes of the K/Peg environmental consequences. -Some scientists remain convinced that another impa ct at the K/Peg boundary (perhaps not loud have been significantly larger than the Clubbing impact, but impacts would NOT have been the only cause.Some factors may be: -During the late Cretaceous, the superscription of Pangaea was starting to fragment. This would have caused changes in oceanic circulation and climate. -Even more significantly, global climate would have been affected by an increase in volcanic activity, in particular, during the formation of the Decca Traps in India, which were highly active at this time. Like the Siberian Traps that occurred at the end of the Permian, this activity would have reduced vast quantities of gases that could have seriously affected the Earth's climate.S. Describe the type and location of potential impostors and rate of meteor influx. 1) Comets are essentially material left over from the formation of the Solar System and are composed of icy material and other debris – effectively â€Å"dirty snowballs† in space. As comets tra vel towards the Sun, the ices vaporize producing the comet's tail. -Two examples of comets are comet Halley, which comes into view of the Earth every 74-79 years, and comet Hale-Bop that was last seen in the night sky in 1997 and will turn in 2380 years. An annual event is the Leonie Meteor Shower, which is visible in Canadian skies in November. This rain of â€Å"shooting stars† is produced as the Earth passes through the debris left behind by comet Temple-Tuttle as it orbits around the sun -There are two comet â€Å"stores† in the Solar System: a) The Keeper belt exists in an area from about the orbit of Neptune to about 50 auk's out (1 AU = 150 million km) -May contain 1 billion (1 x IOWA) comets that are greater than km in diameter. ) The Root cloud is a cloud of comets that exists way beyond the Keeper belt and is only Oakley associated with our sun -May have more than 200 comets with a diameter greater than 500 km with many smaller but still significant in size - It is interesting to note that comets may have been responsible for bringing much of the water and perhaps some of the organic compounds that would lead to the development of life of Earth 2) Asteroids are mostly found in a belt between the orbit of Mars and Jupiter.It is speculated that they may represent the material that might have formed another planet early in the history of the Solar System if it were not for the gravitational effects of Jupiter. Some asteroids are solid, rocky to metallic while others are little more than â€Å"rubble piles† in space. Collisions between asteroids could potentially cause them to be redirected into Earth-crossing orbits. Of those so far mapped, a few are over km in diameter, about 1000 have diameters greater than 30 km and 1 million (alexia) with diameters over 1 km T.List some of the major impact features preserved on the Earth's surface and explain why impact craters appear to be rare on Earth. -Around 100 billion (IXIA 1) objects ente r our atmosphere every rush 0 most of these are burned out at a distance of km above the Earth's surface. These objects are commonly traveling around 11-km/ second. At such speeds, the atmosphere acts like a brick wall. If an object enters at a shallow angle, it may skip like a stone being skipped across a pond and fly back out to space -Early in Earth's history, our planet probably suffered on our planetary neighbors' like Mercury.The evidence of this early bombardment is missing on Earth due to processes of erosion and active plate tectonics. -Until recently (sass's) the possibility of impact on Earth's surface was regarded as improbable. -Craters such as Meteor Crater in Arizona and even the craters on the non were held by some to represent extinct volcanoes and not impact craters at all. U. Describe some of the features and processes of crater formation. Gene Shoemaker was to change this view by studying features such as the material thrown out of a crater (ejects), shocked quar tz, and chemical anomalies, which demonstrated extra-terrestrial origins for these features. -With the aid of satellite imagery, we are now beginning to identify more craters on the surface of our planet. V. Provide examples of Canadian Impact Craters. -Manicuring impact crater (Northern Quebec) – formed about 214 Ma in the Late Triassic. It is km in diameter but was probably as wide as km before glacial erosion stripped away the upper levels. This impact even is thought to be associated with 4 others including Saint Martin Crater (Manitoba) – 40 km in diameter and Architecture Crater (France) – 25 km in diameter. -When the continents are reassembled into their locations during the late Triassic all these craters line up along 22. 8 degrees North latitude over a distance of 462 km. -It is thought that this almost improbable alignment may actually represent a fragmented body that generated several impacts. It is interesting to note that although the effects of th is impact would have been severe, it is not associated with a major mass extinction event W. Describe the hypothesis proposed by Rap and Sheepskin. -They analyzed the number of mass extinctions during the Phonetics and concluded that every 25 million years there was severe stress on the biosphere, sometimes associated with a mass extinction event -There is no known terrestrial geological process that could cause this frequency of problems for the biosphere.So it was suggested that an extraterrestrial source may be to blame 0 comets in the Root cloud were cited as being the most likely culprit -Rap and Sheepskin's hypothesis suggests that every 25-26 million years, something shifts the Root cloud, which causes some comets to fall in towards the Sun and a possible impact with the Earth 0 for this to work, we need to identify a gravity source that can cause disturbances in the cloud on a regular 25 million year basis: 1) Nemesis – Companion Star: This hypothesis proposes that ou r Sun has a companion star way beyond the outer limits of our Solar System whose orbit brings it close to the Root cloud every 25 million years.The gravitational effects of this close pass could cause comets to fall into the inner Solar System. If this body was a red dwarf star or even a black hole, it might be difficult to detect, but even though powerful telescopes such as Hubble have the Nemesis hypothesis, this has an astronomical body (Planet X) that causes shifts in the Root cloud as it orbits around the Sun. In this case, the body y is a planet lying within the bounds of the Root cloud but outside the Keeper belt. Again, no evidence of such a planet has been found. 3) Movement Through the Galactic Plane: In the same way that our planet orbits the Sun, so our Solar System orbits around the center of the Milky Way Galaxy.Galaxies are not Just flat pancakes of stars, they also have â€Å"thickness† -In addition to traveling around our galaxy, our Solar System is also movi ng up and down through it, Every 25-26 million years we pass through the densest part of the galaxy, which contains a higher number of stars and also the most gravitational effects. It is proposed that it is this movement through the dense part of the galactic plane that is responsible for the shifts in the Root cloud and thereby a potential impact related biosphere crisis every 25 million years or so. X. List and describe some recent impacts and â€Å"near misses†. ) Tunas, Siberia None 30, 1908): A large explosion about km above the surface attributed to an extraterrestrial object breaking up I the atmosphere (which is why no crater was found).Fortunately, the area was not populated but people and horses km away were knocked off their feet. The shock wave from the blast traveled around the Earth twice. -In Scotland and Sweden, a light appeared in the sky so bright that you could read books at am without the aid of artificial light. It has been suggested that this might have been a fragment of comet Neck, which was passing close by the Earth at hat time -Over 80 million trees were knocked over covering an area about kamala (compare the area of the Tunas devastation to that of the area occupied by Washington, D. C. ) 2) Asteroid near misses: 1989, 1996, 2009, 2011 -March 22, 1989: A mm asteroid misses Earth by 6 hours.

Social Media Advertising On The New Way Of Advertise Essay

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