The Motives Of Jeffrey Dahmer Essay Research free essay sample

The Motivations Of Jeffrey Dahmer Essay, Research Paper The Motivations of Jeffrey Dahmer It? s a beautiful twenty-four hours. The Sun is out and the birds are peeping. Breakfast is ready and the childs are really collaborating with their forenoon rites fixing for school. You sit down at the kitchen tabular array with a steaming cup of java, take a breathing in repose, as you begin to indulge yourself into the forenoon paper. And that? s when it happens. ? HOUSE OF HORRORS UNCOVERED WITH THE ARREST OF LOCAL CANNIBAL KILLER, ? is what the headline read. To the faultfinders, this would non make much concern. But, for most of us in the summer of 1991, the horrors that were uncovered in flat 213 on Milwaukee? s North twenty-fifth St. sent shockwaves through the state. Jeffrey Dahmer commanded the attending of all America, making a bombilation about the term? cannibal? and resparking arguments about the phenomenon of the consecutive slayer. We will write a custom essay sample on The Motives Of Jeffrey Dahmer Essay Research or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page When the slaughter was over the organic structure count had risen to 17. All of Dahmer? s victims were minority work forces. Typically Dahmer would travel to a homosexual saloon, score a chosen adult male, and convey him back to his flat. He frequently lured them to his topographic point by offering them money to take bare exposures of them. Once they were in his flat they would imbibe and hold sex. At some point Dahmer would blend up a drink with powdery Halcion and give it to the victim. The Halcion instantly made the victim base on balls out. Once the victim was unconscious he would go on to hold sex with them. His following measure was to kill them by choking. When the victim was deceased Dahmer would so hold sex with them once more before the procedure of taking apart began. Dahmer chopped up his victims. Some of the organic structure parts were eaten by Dahmer and saved in the deep-freeze. The other parts of the organic structure ended up in a barrel of acerb Dahmer had concoc ted to disintegrate the corpses. What sort of a human being does this? If we could happen what motivates one to perpetrate such atrociousnesss, wouldn? T we be able so to acknowledge these scenarios in the hereafter in order to halt them. In the undermentioned pages I will research what motivated Jeffrey Dahmer to kill. Jeffrey Lionel Dahmer was born to Lionel and Joyce Dahmer on May 21, 1960. During Jeffrey? s childhood, Lionel had gotten through his unmarried mans and Masterss grades. He was in the procedure of a grueling Ph.D when Jeffrey started acquiring into problem. Because of the deficiency of clip on Lionel? s custodies, he asked a local probation officer to examine immature Jeffrey to happen the beginning of his problems. Jeffrey confessed to the probation officer that a vicinity male child had sexually molested him. Don Davis? book, The Milwaukee Murders, quotes the probation officer as stating that possibly that incident? may be the ground why Jeffrey has jobs with gender issues. ? The Milwaukee Murders besides reports that Jeffrey? s schoolmates had a difficult clip linking with him. Jeffrey was really polite, orderly, and willing to delight, blinking a soft smiling when he was complimented. Jeffrey was obsessed with taking apart. From the age of 12 he would kill isolated animate beings and hone his technique. He concocted a brew of acids that would deprive the flesh right off the bone. Dahmer would subsequently utilize this technique on his human victims. By contrast, Dahmer displayed a authoritative passive/aggressive personality. Answer ME! ; publish 2 ; 1992, reports that Jeffrey? s parents screamed at each other all the clip and finally got a divorce by the clip he finished high school. After the divorce, Jeffrey? s female parent took his younger brother and moved to Wisconsin, go forthing Jeffrey behind. Dahmer ever did experience closer to his Mother and felt greatly abandoned by her departure. He was really smart, academically. He felt as though his male parent didn? t value him much. ? There was non much of a bond, ? Dahmer subsequently said. ANSWER ME! besides reports that, in an effort t o win over friends in school, Jeffrey tried to be the category buffoon. His attempts were in vena, as his effort at wit was non good received. So, what does it all mean? Does it sound all that unusual? My decision is that I have found that there is something even scarier than the horrid things that Jeffrey Dahmer did. What is scariest of all is that a cannibalistic slayer could emerge from anyplace. Compared to the mean American upbringing, Dahmer? s childhood was non all that extreme. These may hold been some of the cardinal factors into what motivated the adult male to kill. And, these features are common among consecutive slayers. But, these are features shared by 1000000s of Americans. Harold Schechter says in his book, Deviant, that? a consecutive slayer of his quality is like Halley? s Comet. They come about one time every 75 years. ? So what is he proposing? That, possibly, it is all merely a Numberss game? That although many of us portion the same experiences some of us merely merely travel bad? People Weekly ; Dec 12, 1994 reported that, while in gaol, Jeffrey accepted Christ, attended church on a regular basis, an d even got baptized. Dahmer clearly showed compunction when stating, ? I do non merit to populate for what I have done. I am regretful that I have non been sentenced to die. ? Dahmer was clearly capable of rational idea. A fellow inmate killed Dahmer on November 28, 1994 merely five yearss after wishing for his ain decease. $ 407,000 was raised, from auctioning off Dahmer? s ownerships, to assist the victim? s households, ABA Journal ; August 1996. Despite the horrific and demonic things the adult male did, The Wall Street Journal ; Feb. 11, 1992, says it best when they quote Dahmer? s defence lawyer, Gerald Boyle, as stating, ? This was non an evil adult male, he was a ill adult male. ? 409 The Milwaukee Murders ; St. MArtins ; 1995 ANSWER ME! ; publish 2 ; Goad To Hell ; 1992 Peoples Weekly ; Dec. 12, 1994 The Wall Street Journal ; Feb. 11, 1992

Role of Employee Engagement on Employee Performance in the Context of Pakistan Essays

Role of Employee Engagement on Employee Performance in the Context of Pakistan Essays Role of Employee Engagement on Employee Performance in the Context of Pakistan Essay Role of Employee Engagement on Employee Performance in the Context of Pakistan Essay the Q12 and Overall Satisfaction). These 13 items - which were selected because of their importance at the business-unit or workgroup level - measure employee perceptions of the quality of people-related management practices in their business units. The overall study involved 410,225 independent employee responses to surveys and 13,751 independent business units in 82 companies, an average of 30 employees per business unit and 168 business units per company. One hundred seven (107) research studies were conducted across the 82 companies. In this meta-analysis lot of different were selected so that each company was represented once in each analysis. For several companies, multiple studies were conducted. In order to include the best possible information for each company represented in the study, some basic rules were used. If two concurrent studies were conducted for the same client (where GWA and outcome data were collected concurrently, i. e. , in the same year), then the weighted average effect sizes across the multiple studies were entered as the value for that company. If a company had both a concurrent and a predictive study (where the GWA was collected in Year 1 and outcomes were tracked in Year 2), then the effect sizes from the predictive study were entered. If a company had multiple predictive studies, then the mean of the correlations in these studies was entered. In this meta-analysis Pearson correlations were calculated, estimating the relationship between business-unit average measures of employee perceptions and general business outcomes. Correlations were calculated across business units within each company, and these correlation coefficients were entered into a database for each of the 13 items. The researchers then calculated mean validities, standard deviations of validities, and validity generalization statistics for each item for each of the five business-unit outcome measures. These studies have indicated a directional relationship from employee engagement to outcomes such as employee retention and customer loyalty/engagement, and a directional and somewhat reciprocal relationship between engagement and financials. They expect that in most healthy business units, a reciprocal relationship exist, in which engagement fuels better management and better management fuels ownership and engagement (involvement and enthusiasm). These studies have also indicated that, there are differences across business units in the way employees perceive their work environments, environment and these differences relate to differences in performance. Such differences represent substantial utility to businesses and other organizations Hakanen et al (2006). Conduct a study to investigate the burnout and engagement among teachers. In this study the Job Demands–Resources Model was used as the basis of the proposal that there are two parallel processes involved in work-related well-being among teachers, namely an energetically process(i. e. , job demands – burnout ill health) and a motivational process (i. e. , job resources engagement – organizational commitment). In addition, some cross-links between both processes were hypothesized. In this study they used the Structure Equation Model to test the hypothesis. The basic focus of this research was to investigate the drivers that lead to burnout and engagement in Finnish teachers. They conduct a survey to collect the data from 2038 Finnish teachers. They used the questionnaire technique to collect the data. They used the Maslach Burnout Inventory–General Scale (MBI– GS to measure the burnout. Work Engagement was assessed with the Utrecht Work Engagement Scale (UWES) in this study. Results of this study shows that job control, information, supervisory support, innovative climate and social climate were all positively related to work engagement. This study shows a positive relationship between job resources and work engagement. The results of this study also confirmed the existence of both processes, although the energetically process seems to be more prominent. More specifically, (1) burnout mediated the effect of high job demands on ill health, (2) work engagement mediated the effects of job resources on organizational commitment, and (3) burnout mediated the effects of lacking resources on poor engagement. Bakker et al. 2006) conducted a study to explore the success factors among female school principals in primary teaching. They conduct a study on burnout, engagement and performance. They used the survey method to collect the data through questionnaire technique from the sample size of 105 school principals and 232 teachers. They used the Structural Equation Model to measure the hypothesis among principals. Their study showed significant and positive associations between school principals’ work engagement scores a nd teacher-ratings of school principals’ performance and leadership. More specifically, results of structural equation modeling showed that engaged principals scored higher on in-role and extra-role performance. In addition, engagement was strongly related to creativity; the higher school principals’ levels of work engagement, the better they were able to come up with a variety of ways to deal with work-related problems. Finally, engaged school principals were seen as transformational leaders – being able to inspire, stimulate and coach their co-workers. Chapter 3 Theoretical Framework Theoretical Model Role of Employee Engagement on Employee Performance Theoretical Foundation A stronger theoretical rationale for explaining employee engagement can be found in social exchange theory (SET). Social exchange theory argues that obligations are generated through a series of interactions between parties who in a state f reciprocal interdependence. A basic principal of theory is that relationships evolve over time into trusting, loyal, and mutual commitments as long as the parties abide by certain â€Å"rules of exchange (Cropanzano and Mictchell, 2005). Rules of exchange usually involve reciprocity or repayment rules such that the actions of one party lead to a response or actions by the other party. For example when individuals receive economic and socio emotional resources from their organization, they feel obliged to respond in kind and repay the organization. This is the two way relationship between employee and organization. One way for individuals to repay their organization is through their level of engagement. That is, employees will choose to engage themselves to varying degrees and in response to the resources they receive from their organization. Thus in summery social exchange theory tells that the employees choose to engage more or less with the organization on the basis of what resources they receive form the organization. This theory provides the theoretical foundation and explains that employees are more likely to exchange their engagement for resources and benefits provided by their organization. Kahn’s personal engagement theoretical framework is helpful in better understanding the concept of employee engagement. According to Kahn’s (1990) personal engagement theoretical framework, people express themselves physically, cognitively, and emotionally in the roles they occupy; people are more excited and content with their roles when they draw on themselves to perform their roles; and people vary in their levels of attachment to 1-3 their roles. Furthermore, Kahn suggested that people vary their levels of personal engagement according to the meaningfulness of a situation (or perceived benefits), the perceived safety of a situation, and their availability based on resources they perceive they have. On the other hand, an individual can become disengaged and protect himself or herself by withdrawing and hiding his or her true identity, ideas, and feelings. According to Holbeche and Springett (2003), people’s perceptions of ‘meaning’ with regard to the workplace are clearly linked to their levels of engagement and, ultimately, their performance. They argue that employees actively seek meaning through their work and, unless organizations try to provide a sense of meaning, employees are likely to quit. The research findings suggest that many people experience a greater search for meaning in the workplace (70 per cent) than in life in general (ibid). There are numerous possible reasons for this, for example, it may be because people generally spend longer at work than on other parts of their lives. Holbeche and Springett (2003) argue that high levels of engagement can only be achieved in workplaces where there is a shared sense of destiny and purpose that connects people at an emotional level and raises their personal aspirations. According to Schaufeli et al. (2002, p. 4) explain that engagement is a positive, fulfilling, work-related state of mind that is characterized by vigor, dedication, and absorption. † They further state that engagement is not a momentary and specific state, but rather, it is â€Å"a more persistent and pervasive affective-cognitive state that is not focused on any particular object, event, individual, or behavior†. Vigor is characterized by hig h levels of energy and mental resilience while working. Dedication refers to being strongly involved in one’s work and experiencing a sense of significance, enthusiasm, and challenge. Absorption is characterized by being fully concentrated and happily engrossed in one’s work, whereby time passes quickly and one has difficulties with detaching oneself from work. In short, engaged employees have high levels of energy and are enthusiastic about their work. Expectancy theory points to the importance of the individual’s expectations of his job in determining Employee Engagement. For individuals who have expectations that their job should give them opportunities for pay, challenge, a failure of the job to meet this expectation will lead to disengagement compared to a situation where no such expectation is involved. What expect expectation of individuals will have of a job may vary. For a large number of reasons, some is deriving from social others from individual causes. Another theory that has dominated the study of the nature of Employee Engagement is Herzberg? s famous â€Å"Two factory Theory? s of Employee Engagement. In this he claims that the factors which cause Employee Engagement are separate and distinct from the factors which job dissatisfaction. The factors causing Employee Engagement, which level factors such as their relating to satisfaction with the job itself. The factors which cause job dissatisfaction called hygiene factors are more concerned with conditions of work such as pay and supervision. At no time does Herzberg argue a job satisfactory, except may be for a short run. Chapter 4 Data Collection and Methodology. We chose the survey topic relating to the role of employee engagement on employee performance. To collect data, we adopted the ‘Survey Questionnaire Research Technique’. The questionnaire was solved by the sample size of 111 people working in different industries in Pakistan. We focused on interacting with people from all major sectors in Pakistan, including banking sector, academia, corporate aura and officials from the public sector as well. We used the questionnaire method to analyze the situation because participants’ responses to direct questions always are very revealing that adds value to the research purpose. The famous 5 point ‘Likert Scale’ designed by the psychologist Rensis Likert is used in the survey. This scale is widely used for the collection of data in questionnaire method. The respondents were asked to tell as to what level hey agreed or disagreed on different queries as the 1-5 likert scale ranges from strongly disagree to strongly agree. After collecting the data from respondents we computed the questions into variables through the SPSS software. After computing the question into variables we found the descriptive statistics. In descriptive statistics we have found the maximum and minimum range of the data and we a lso have found the mean and standard deviation of the data. We used the histogram to check the normal distribution of the data. We used the scatter plot to check the relationship between our independent and dependent variables. After that we have done the correlation by using SPSS software. We have done the correlation to find the relation between independent and dependent variable to find that the independent and dependent variable have the positive or negative relationship. We used the regression analysis to find the relationship between dependent and independent variables. In regression analysis we found the coefficient of variable and here we check the significance level and the effect of independent variable on dependent variable. Using SPSS software we have done regression analysis to find the relationship between dependent and independent variables. In regression analysis we found the coefficient of each variable and here we found the significance of each variable and the relationship between the variable is weather positive or negative. We used the t-test to check the level of significance to select the null or alternative hypothesis. We used the R-Square analysis to find the on what percentage the independent variable has on dependent variable. We used the f-test to check the joint effect of employee engagement on employee performance. Chapter 5 Data Analysis and Interpretation In this part of the study empirical findings have been shown and interpreted. Table 3. 1 presents the descriptive statistics which show the overall picture of the variables. Figure 5. 1 [pic] In this histogram we have the frequency distribution on Y-Axis and the independent variable on the X-Axis. The bell shape in this histogram shows that the data is normally distributed. Figure 5. 2 [pic] Figure 3. In this histogram we have the frequency distribution on Y-Axis and the Dependent variable employee performance on the X-Axis. The bell shape in this histogram shows that the data is normally distributed. Table 5. 1 Descriptive Statistics | |N |Minimum |Maximum | |Employee Engagement |Pearson Correlation |1 |. 690** | | |Sig. (2-tailed) | |. 00 | | |N |111 |111 | |Employee Performance |Pearson Correlation |. 690** |1 | | |Sig. (2-tailed) |. 000 | | | |N |111 |111 | |**. Correlation is significant at the 0. 01 level (2-tailed). | Table 5. 3 Regression Dependent Variable: Employee Performance |Variables |Coefficients |Std. Error |t-test |Significance Level | |(Constant) |1. 582 |. 239 |6. 608 |. 000 | |Employee Engagement |. 619 |. 062 |9. 955 |. 000 | | | EP=C+B1(EEi)+ Ei EP=1. 582+. 619(EEi)+ Ei Table 5. 3 presents the results of the regression analysis. The results show that the independent variable employee engagement is significantly affect the employee performance as shown by the values of the t-statistic and the corresponding P-Values. t-test is used to test the significance of the individual partial regression coefficients. Null hypothesis in this test is set as the partial regression coefficient is zero. This test shows that the coefficient of employee engagement is statistically significant at less than one percent level of significance. As the coefficient of the employee engagement has the positive sign so the effect of the employee engagement on employee performance is positive. The magnitude of the partial regression coefficient of the employee engagement is 0. 619, which suggests that holding other factors constant an increase of one unit in this variable would raise the employee performance by 0. 619 units. Our independent variable is employee engagement and its significance level is 0. 00 which is less than 0. 05 its means the relationship of employee engagement and employee performance is positive and statistically significant. Table 5. 4 Necessary Statistics |Coefficient of |Adjusted Coefficient of |F-Statistic |Sig. (F-Stat) | |Determination (R2) |Determination (Adj. R2) | | | |0. 476 |0. 471 |99. 093 |0. 000 | Table 5. 4 reflects the joint effect of the independent variable’s on dependent variable. Coefficient of Determination R-Square is used to find the percentage that to what extent the independent variable’s affect on dependent variable. The value of the coefficient of determination (R2) is . 476. This shows that the 38 percent affect on dependent variable employee performance is due to the independent variable employee performance and the other 52 percent affect on employee performance is due to the other variables which are not included in our research study. In 3. 4 the value of F-statistic is statistically significant at less than one percent which exhibits that our independent variable is jointly affecting our dependent variable that is employee performance. Chapter 6 Conclusion and Summery These days Employee Engagement has become a very hot topic of the management in this global competitive world. Everyone seems to be on the path to get their employees engaged. The claim has been made that engagement is needed for higher levels of firm performance while, consultant studies estimate that only 14 percent to 30 percent of employees are really engaged at work. In particular, very little attention has been given to the engagement levels of people running organizations. But unfortunately the importance of employee engagement has been only recognized by the top multinational organizations. While, in Pakistan the importance of the concept is still not really understood. The companies operational here are yet not paying yield to improving engagement of employees. Organizations need to concentrate on optimizing employee productivity and available organizational resources. This study has investigated the relationship between employee engagement and employee performance in Pakistani context. It provides the ground basis to organizations that are working in Pakistan and want more productivity with their human assets to gain more productivity by engaging their human assets nd investing on them. This study has the significant implications for the Pakistani organizations to engage their employees on workplace to gain the competitive advantage and more productivity. For this study we use the employee engagement as independent variable and employee performance as dependent variable. To study the relationship of employee engagement on employee performance we used various statistic al techniques. We used descriptive statistics and here we found the minimum and maximum range of data and also found the means and standard deviation of variables. The measure of central tendency (Mean) of employee engagement is 3. 82 which show that most of the respondents agree that they are engaged in their companies. The mean of employee performance is 3. 94 which show that those employees who are engaged in their organizations are more productive. To check the relationship between dependent and independent variable a scatter plot was drawn, the line goes left to right upward which shoes that the independent and dependent variable have positive relationship; it means that independent variable influences employee performance. A Histogram graph was drawn to find the frequency distribution of data and it was found that the data is distributed normally because it gives us a bell shape. The correlation between employee engagement and employee performance shows that the employee engagement has the moderate positive correlation with employee performance and this relationship is also statistically significant. According to our research model it is statistically proved that employee engagement have a positive impact on employee performance. Like several other studies (Schaufeli and Bakker, 2004; Sonnentag, 2003) the results of this study suggest that employee engagement partially mediates the relationship between antecedent variables and consequences. The results of this study also suggest that employee engagement can be understood in terms of SET. That is those employees who receive higher organizational support are more likely to respond with greater levels of engagement in their job and in the organization. Further this study provides some implications for the companies who have their operations in Pakistan; a need to focus on employees’ engagement. This research suggests that the companies should engage their employees on the workplace so that they can be willing to apply extra effort for more productivity. This study demonstrates that the organizations should invest on the engagement of their human assets that will consequently yield more profit for the organization. Limitations: 1. First of all, there is a need for more research in the field of employee engagement and employee performance. Not enough research has been done in order to describe the rel

State Childrens Health Insurance Program Essay Example | Topics and Well Written Essays - 1250 words

State Childrens Health Insurance Program - Essay Example State Children’s Health Insurance Program was an initiative that enjoyed the support of the congress as well as the US presidents. For example, while President Clinton together with the first lady Hillary Clinton provided adequate support to Senator Kennedy during the drafting of the bill, President Obama ensured that the umber of children being covered by the program increased. One of the key measures that were taken by Obama in 2009 to ensure that 4 million children were covered was the signing of the Children's Health Insurance Reauthorization Act. Additionally, the program was authorized to be under operation for the next two years after the signing of Patient Protection and Affordable Care Act and Reconciliation Act of 2010 by president Obama. Despite support by the two US presidents, there was a set back in 2007 when President Bush opposed the reauthorization bill arguing that the expansions were not proper. This led to the signing of the reauthorization bill in 2007 tha t only allowed the S-CHIP to continue its services without increasing the number of benefits. Two notable political aspects that provided a positive impact on the S-CHIP was the control of the Oval Office by the Democrats as well as their high number in both houses of congress. As a result of these aspects, the program was expanded up to 2013 after the passage of the reauthorization bill. The success of the State Children’s Health Insurance Program can be traced to the contributions of a number of political players. For instance, Bill and Hilary Clinton, the key supporters of the bill advocated for more adjustment to be made to the health legislations in order to cater for the health of the children. Similarly, it was

College if worth for most of people but not all kind of people Essay

College if worth for most of people but not all kind of people - Essay Example Many of the college students are struggling to repay their college loans. After school, they cannot be able to purchase a new home, car, or other important assets to help them live a happy life (Konwerski 1). Instead, their salary is being deducted to repay the college loans which makes it hard for them to achieve their goals when they are young. This explains the reason why many young people are yet to invest or even save for their future and that of the children. Therefore, at the end, those who never attend college are able to do well as they start to invest early enough, an aspect that enables them to lead a happy and better life (Leonhardt 1). The success of many college dropouts such as Bill gates and Mark Zuckerberg is an indication that college education is losing its focus. The current curriculum is focusing mainly on equipping the students will papers. Rather than helping the students nurture their talents, it is encouraging a culture of cramming. In addition, many colleges have become money making ventures (Burke 1). Therefore, equipping the students with the necessary skills for their future careers is an aspect that is being given little attention in the colleges. Instead, many colleges are admitting many students than the infrastructures in these institutions can handle in order to earn more money. This explains why some of the successful dropout ends up employing college graduates because they believe that they are entitled to a job rather than creating employment themselves (Rossi 1). The majority of the college students attends school to please their parents and pass this stage of life. They lack motivation to go through their respective courses. In addition, many parents force the students to pursue specific courses because they feel that they are marketable and fetch a higher salary (Brandon 1). However, this system of education ignores student’s talent. Therefore, many students end up in different careers than what they

The Milestones and Major Developments in the Early Paleozoic Era Essay Example for Free

The Milestones and Major Developments in the Early Paleozoic Era Essay Understanding the diversity and complexity of life as observed in the current modern days may seem as difficult as defining life itself. The changes, developments, and evolution of the earth and the life forms it holds are all varied and sundry enough which makes it hard to understand without looking back to when, where, and how it all started. History, Geology, Paleontology, and many other branches of Science play a significant role in aiding people to better understand the roots and beginnings of the life seen today. These fields of studies help and serve like windows to the past which make it easier to know what it was like back when the Earth was young and life was primitive. These various disciplines draw attention to where life originated. Knowing the evolution of the earth and life forms can help make people understand what the modern life is made of. While some would see this study as a lame and monotonous venture, it can never be denied that knowledge about the origins of life and the world addresses very common issues like confusions as to how the modern human beings got their form and the very controversial issue as to where actually life came from. Debates and ideological arguments will always be inevitable, but Science got the only factual proofs and pieces of evidence about where life actually started and how it came to its present form from the simplest and most primitive elements. All these can only be understood by studying and looking back at the beginning. Thus, this paper shall discuss one of the most important and most highlighted eras in the history of life and the Earth—the Early Paleozoic Era. The Paleozoic Era The term â€Å"Paleozoic Era† literally equates to the term â€Å"time of ancient life† (Farabee). This is the bracket of time between 544 and 245 million years in the past. The Online Biology Book written by Michael Farabee and sponsored by Estrella Mountain Community College summarizes the major highlights of the Paleozoic Era. A section of the book explains meticulously about this prehistoric period. The Paleozoic era is from the general period when life forms began to spring known as the Phanerozoic Eon. This period has been known to exist about 542 million years ago (Farabee). Phanerozoic Eon consists of three specific eras such as: 1) Paleozoic Era—also known as the â€Å"ancient life† which existed 542 to 251 million years ago; 2) Mesozoic Era—also regarded as the â€Å"middle life† which existed 251 to 65. 5 million years ago; and 3) Cenozoic Era—dubbed as the â€Å"recent life,† which has existed since 65. 5 million years ago up to the present time (Gore 1). The Paleozoic Era appears to be the first period from the Phanerozoic Eon when the earliest complex life forms first existed. The Early Paleozoic specifically can be further divided into three periods such as the 1. ) Cambrian, 2. ) Ordovician, and the 3. ) Sulirian periods. It was during the earlier parts of the Paleozoic era when major advances in biological evolution were dated. The first of such developments and evolutions was that of the Cambrian Explosion. After this highlight came the developments of some group of green algae from the Ordovician period. This development in the early forms of primitive plants led to the evolutions of vertebrates since most plants during that time were found to move from water to land (Farabee). The Cambrian Explosion (544-505 million years ago) The Cambrian explosion during the earliest years of the Paleozoic era has been considered as the most interesting zoological myth there is about the origin of life (Dawkins and Wong 436). This is because this was the period when the earliest known animal and plant life sprang and had left very remarkable pieces of fossils which served as their memoirs for the modern scientists of today. It was during the Cambrian period when primitive life such as Coelenterates, protozoa, poriferans, molluscans, worms, echinoderms, trilobites, tribitmorphs, achaocyathids, and brachiopods were found to rule the animal kingdom (Balisteri et al. ). However, these primitive life forms were seen only in bodies of water. The Early Cambrian period was also tagged as a â€Å"wild time† for animal evolution (Farabee). This was because within the relatively short period of time, a wide variety of body plans among animals have already developed. One of the most prevailing groups of primitive animals during that time was the trilobites. These shallow-marine dwelling organisms lived during the Cambrian period, and through the rest of the period, this group has diversified into other more complex forms of organisms (Balisteri et al. ). However, due to the massive cooling and freezing on most of the Earth’s land during this time, extinction was found very distinct in this period. As to primitive plant life during the Cambrian period, algae was found to be the major group of plant life that existed in this period. These plants were known to have secreted lime-like substances which aid in the development and formation of rocks (Balisteri et al. ). Also, plants were found to have inhabited the lands first before the animals did during the Cambrian period. It was also during this period when the world’s primitive supercontinent, Pangaea, was believed to start breaking apart (Balisteri et al. ). During the Cambrian period, the large continent of the North America moved upward the globe through the equator. Gondwana, which is the largest remaining land mass of Pangaea during that time, divided into what we know today as India, Australia, Antarctica, and South America. The Ordovician Period (505-440 million years ago) The Ordovician period was characterized by the emergence of the world’s earliest volcanoes. This caused the formation of igneous rocks from the produced ash and lava from eruptions (Balisteri et al. ). This period was also marked by the continental submergence. The most highlighted part of this event was the Late Ordovician Flood which caused continents to contract and moved closer to each other. The most popular remain of this great flood as of today is the Atlantic Ocean (Balisteri et al. ). It was also noted that sea levels were generally high during the Ordovician period. However, there were still shallow waters that have been dated and found to have depositions of shallow water carbonated rocks. These were eventually traced through the presence of mudcracks and stromatolites nowadays (Gore 6). When it comes to life form evolution, diversification will best describe the action by the survivor organisms among the many life forms that became extinct from the Cambrian period (Farabee). During this period, the earliest forms of sea vertebrates, such worm-like creatures, evolved (Christian and McNeill 123). These are the creatures were found to be the ancestors of the sharks and common fishes today. These Ordovician marine vertebrates were complete with backbone, limbs, and a nervous system which formed mainly the head. Also, the remaining species that the Cambrian period left like the brachiopods, trilobites and mollusks were reported to undergo a Jurassic evolution. Thus, the first Ordovician marine vertebrates were reported to be armored, jawless, and covered with hard shells (Balisteri et al. ). On the other hand, the development of plants from the earlier group of green algae was also a milestone during this period. Scientific studies of fossils and biochemical proofs show that modern plant species rooted from the multicellular green algae that prospered during the Ordovician period (Cartage. org). Among these green algal groups, Charophytes were found to be most dominant at that time. These algae with the rest of the other algal groups were known to reside within the cool waters of the ocean, but between 500-400 million years ago, some algal groups were found to transfer to land through various levels of adaptations and evolutions which aided them to live outside the waters (Farabee). The Sulirian Period (440-410 million years ago) This period was characterized by the evolution of scorpion-like creatures as large as modern human beings (Christian and McNeil 123). These creatures were known as Euyperiods which were known to root from the extinct family of marine arthropods (Balisteri et al. ). These creatures were averagely 3 meters long and these were known to reside in the seas. Moreover, various other creatures that were abundant in the Cambrian and Ordovician periods have decreased in number during the Silurian period. Some of these animals were the Trilobites. However, the Silurian period was also distinct for the abundance of coral reefs, cephalopods, and jawed fishes that colored up and made the waters alive during this period. The said reefs have covered what people now know as the sea floors of Wisconsin, Illinois, Ohio, New York, Lake Michigan, Lake Huron, and Lake Erie (Balisteri et al.). This period was found to be dominated by the early vascular plants—which developed tiny tubes within their structures to support the transport of nutrients—as well as varieties of insects (Paull). However, both these plants and animals went through specific challenges which threatened their early extinction during that time. These challenges were that of 1) Drying out—plants and animals would have to take sometime to adapt to a new environment like when they transfer from water to land; 2) Gas exchange—respiration also takes sometime to adapt to the change in environment these creatures had to go through; 3. ) Weight support; 4. ) Conduction; and 5. ) Reproduction—the change in environment also has great effects on the reproduction process of organisms. More often than not, the change of environment tends to slow down their reproduction ability (Farabee). In addition, the Caledonian Mountain which is currently found in Canada was found to have started to form through the collision of European and North American plates (Paull). These were the major highlights and developments during the Early Paleozoic era of life and world history. This field of study may appear too complicated and boring for most people to study. However, by going through the facts and amazing discoveries of the life forms of the past and discovering how they come to produce what life is like today, it may seem that studying where the modern life rooted from is indeed an interesting and adventurous ride through both history and science. Works Cited Balisteri, Alex, Ulrike Balisteri, Bernd Bickel, Ron Schumacher, Beate Steger, and Sarah Young. â€Å"History of the Earth.† Think Quest. 1998. 04 December 2008 http://library. thinkquest. org/20886/. Christian, David and William H. McNeil. Maps of Time: An Introduction to Big History. California: University of California Press, 2004. Dawkins, Richard and Yan Wong. The Ancestor’s Tale: A Pilgrimage to the Dawn of Evolution. New York: Houghton Mifflin Books, 2004. Farabee, Michael J. â€Å"The Early Paleozoic. † On-Line Biology Book. 07 October 2002. Estrella Mountain Community College. 04 December 2008 http://www. cartage. org. lb/en/themes/sciences/Paleontology/Paleozoology/EarlyPaleozoic/EarlyPaleozoic. htm. Gore, Pamela J. W. â€Å"Early Paleozoic Events. † The Earth Through Time. 10 November 2005. Georgia Perimeter College. 04 December 2008 http://higheredbcs. wiley. com/legacy/college/levin/0471697435/chap_tut/chaps/chapter10-01. html. Paull, Gene J. â€Å"Early Paleozoic. † University of Texas at Brownsville. 20 August 2008. 04 December 2008. http://blue. utb. edu/paullgj/geol1404/lectures/early_paleozoic. html.

A Weird Experiece :: Personal Narratives Violence Crime Essays

A Weird Experience We were a threesome that late winter. Friday afternoons when Thomas got home at a decent hour he called on the intercom and I went down the hall to their apartment for drinks. Sometimes when he was late Krystal knocked on my door and asked me to come on down and keep her company. Later we might go out to dinner. Or we skipped dinner and just talked and listened to music. Sometimes on Saturdays he took his car and we drove down the Jersey shore or up the Hudson Valley or to Connecticut. Once we went out to The Hamptons where they were looking for a vacation house. Our friendship lasted exactly three months. A lucky number, Krystal said of the three of us. The perfect number. Thomas Milton was an investment banker. After getting his Masters from Harvard Business School, he'd returned to New York to a major firm and at 32 years old had already made $100 million, or close to it. Thomas was tall, handsome, charming—and Jamaican. His beautiful photo model wife, Krystal, was Dominican and rich in her own right. The Miltons had just bought and were remodeling a penthouse in a nearby Central Park West apartment building and would soon be moving from the cooperative. :: Inevitably we ended up talking about what I was calling in those days the great American divider—the color line. Not that Thomas and Krystal initiated our discussions; they said race didn't matter. No, it was I, the white liberal for whom race does matter, who turned an everyday conversation into a social study. I think they were embarrassed at my endless talk about such an immutable situation—they were black and basta, as Thomas once said soon after we met. And in general, he said, people are racists. That's just the way things are. Yet with each racial affront encountered, with each new racist attack reported on TV, with each new case of police humiliation, I returned to the attack. Relentless, I forced them to participate. How long, I asked piously, this chasm between whites and blacks? Why the fears? Why the silence? I often asked that winter why race had to change our relationship? Change everything? And deprive me of what I above all needed—their respect. One evening after a number of cocktails in the sprawling salon of their big 10th floor apartment I asked them point blank what it was like being black here in the city.

Non-Invasive Diagnostic Techniques

Non-Invasive diagnostic techniques| | X-rays| An X-ray machine is essentially a camera. Instead of visible light, however, it uses X-rays to expose the film. X-rays are like light in that they are electromagnetic waves, but they are more energetic so they can penetrate many materials to varying degrees. When the X-rays hit the film, they expose it just as light would. Since bone, fat, muscle, tumors and other masses all absorb X-rays at different levels, the image on the film lets you see different (distinct) structures inside the body because of the different levels of exposure on the film. Ultrasound| Ultrasound or ultrasonography is a medical imaging technique that uses high frequency sound waves and their echoes. The technique is similar to the echolocation used by bats, whales and dolphins, as well as SONAR used by submarines. | Thermography| | MRI| MRI scanners vary in size and shape, and some newer models have a greater degree of openness around the sides. Still, the basic des ign is the same, and the patient is pushed into a tube that's only about 24 inches (60 centimetres) in diameter.The biggest and most important component of an MRI system is the magnet. There is a horizontal tube — the same one the patient enters — running through the magnet from front to back. This tube is known as the bore. But this isn't just any magnet — we're dealing with an incredibly strong system here, one capable of producing a large, stable magnetic field. The strength of a magnet in an MRI system is rated using a unit of measure known as a tesla.Another unit of measure commonly used with magnets is the gauss (1 tesla = 10,000 gauss). The magnets in use today in MRI systems create a magnetic field of 0. 5-tesla to 2. 0-tesla, or 5,000 to 20,000 gauss. When you realize that the Earth's magnetic field measures 0. 5 gauss, you can see how powerful these magnets are. Most MRI systems use a superconducting magnet, which consists of many coils or windings of wire through which a current of electricity is passed, creating a magnetic field of up to 2. 0 tesla.Maintaining such a large magnetic field requires a good deal of energy, which is accomplished by superconductivity, or reducing the resistance in the wires to almost zero. To do this, the wires are continually bathed in liquid helium at 452. 4 degrees below zero Fahrenheit (269. 1 below zero degrees Celsius) [source: Coyne]. This cold is insulated by a vacuum. While superconductive magnets are expensive, the strong magnetic field allows for the highest-quality imaging, and superconductivity keeps the system economical to operate. |