The Development Of A Police Officer - 1373 Words

The Development of a Police Officer The development of America’s police officers consists of many elements. These elements are what influence police behavior and action. Throughout time, the concept of policing has been redefined to fit the needs of the time. Originally, the police were a symbol of power and control and used to eliminate enemies of kings and pharaohs. As time move forward, the concept of policing changed the nature of soldiers into policemen. In today’s times, police officers are considered public servants to the people. They are charged with upholding, defending and protecting the freedoms of all citizens. To meet this objective, police departments use one of two approaches; community policing and the concept of†¦show more content†¦Nevertheless, the police force did help maintain civil order within society. It wasn’t until the 1800s in England where the concept of policing emerged and would redefine the purpose and responsibility of a police officer. During England’s medieval times, police functions was the responsibility of local individuals since most of England were primarily rural. Male members of clans or neighborhoods were charged to patrol and keep the peace in their respective area. This type of policing was called the frankpledge, which required all males above the age of 12 to participate in these patrol duties. As the Industrial revolution helped evolved the cities of England, it became apparent that the increase of poverty, joblessness and overcrowding became major issues for the government to maintain order. These issues were the main causes for the tremendous increase in crime (Gaines et al, 2014). Efforts by the government (to include more laws and harsher punishments) did little to stop the rise of crime and disorder. Mostly due to the disorganization of their police force. In addition, the violation of civil rights led to many cases of civil disobedience and riots. Government corruption w as the main cause of citizens’ grief. The police force was mainly used to suppress civil disorderly by any means necessary which led to more resistance, protest and riots. These events led to many criminal justiceShow MoreRelatedThe Development and Responsibilites of Police Officers Essay2519 Words   |  11 Pagesorigins of police work have actually begun. During the medieval times, fudal lords would hire strong men who would ensure that everyone paid their taxes. These hired brutes attempted to maintain some sort of order throughout the kingdom among the people. Unfortunately, in most cases, these men only followed their employer’s wishes and did not handle situations in honest or civilized ways (p.142). 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High Street Retailers And Online Sellers - 1389 Words

Introduction Books, a source of entertainment, education and interest, have been around for hundreds if not thousands of years. Books are widely used at schools, in the workplace and at home, but the recent information age has the taken the world by storm, with the introduction of tablets, e-books and kindles which all provide a convenient use of ‘books’. People’s change in lifestyle and tastes comes with a craze over technology, which begs the question that; are hard copy books that are sold in high street retailers at risk of being extinguished by online resources of books? Or will the long-standing book hold too much sentimental and historical value? This report aims to identify and discuss upon whether High Street retailers and online†¦show more content†¦This has an effect on the increase growth of online sales of books; for example, as the price of books is expensive in the high street, such as WHSmith; customers will switch to online purchase, such as, Amazon. Moreover, the changing in technology also encouraging consumers to switch from traditional printed books sold in high street book stores to e-books sold online. For example, this has been supported by the BBC website which suggests that ‘the total number of printed books sold dropped even further- falling 9.8% to 186.9 million.’ This implies that the continued growth of the digital e-books market sold online has serious impact/responsible for the large decrease in high street book sales. (BBC, 2014) Consumers take price consideration, such as, price elasticity of demand on books. Books are often viewed as price elastic. As the price of the books decreases or it has better offer in online sales, consumer will switch to purchase it online rather than high street. This causes a rise in quantity demanded for online purchase of books and decrease purchase of books from the high street book stores. For example, customers can compare price of the books between the online book stores provided by different sellers, which it creates even high competition for high street book store to compete with online book stores. As high street book stores cannot

Teacher Learning Through The Lens Of Activity Theory Education Essay Free Essays

During recent old ages, teacher larning has gained much attending of principals and school leaders. In many instances schools leaders ‘ effort has been to supply an environment in which the instructors feel supported and accordingly learn efficaciously in their categories. Fuller and Unwin ( 2006 ) have categorized schools ‘ acquisition environments, as either restrictive or expansive in respect to their nature of societal interactions. We will write a custom essay sample on Teacher Learning Through The Lens Of Activity Theory Education Essay or any similar topic only for you Order Now Concentrating on the impressions introduced by Fuller and Unwin ( 2006 ) , in this paper I analyze these two acquisition environments in an Persian bilingual school, in which Persian and English are the media of direction, through the lens of activity theory. Kutti ( 1996 ) defines activity theory as â€Å" a philosophical and cross-disciplinary model for analyzing different signifiers of human patterns as development procedures, both single and societal degrees interlinked at the same clip † ( p. 23 ) . Sing this definition, utilizing activity theory in analysing the Persian school environment, I show how this model and its rule of contradictions can be relied on to steer research in larning environment and educational engineering. Furthermore, this survey provides an penetration into alterations in the instructors ‘ acquisition at workplace when a new technological tool becomes portion of schools ‘ activities and communicating. Keywords: expansive acquisition environment, restrictive acquisition environment, formal acquisition, informal acquisition, activity theory, teacher larning, e-learning 1. Introduction 1.1 Introduce the Problem Schools are non merely places where pupils learn but besides are they topographic points for instructors ‘ acquisition. Nowadays, school leaders around the universe are seeking to determine a civilization in which acquisition for both pupils and instructors happens in the most effectual manner. Since school principals have realized that instructors ‘ cognition and emotional provinces may impact pupils larning, which is the ultimate end of schools, they try to supply an environment in which instructors upgrade their accomplishments and decide their emotional battles related to their workplace. However, it is of import to detect what â€Å" counts † as workplace larning for instructors. Marsick and Watkins ( 1990 ) defined this as chances for acquisition, both those that are more formalistic and knowing and those characterized as minor expense. The focal point of this survey is on instructors ‘ acquisition and larning environment characterized as restrictive or expansive. Furthermore, analysing a instance through the lens of activity theory by concentrating on contradictions inside the activity systems provides an reliable illustration of both restrictive and expansive acquisition environments. The chief intent of this survey, nevertheless, is to demo how the activity theory can be utile in analysing instructors ‘ acquisition in different acquisition environments. This survey is organized in four subdivisions. The following subdivision provides an overview on the constructs related to instructors ‘ workplace acquisition and the activity theory model, by reexamining some cardinal literatures. The method subdivision describes the types and design of this survey. The consequence subdivision looks at two different larning environments in an Persian school and an e-learning plan through the lens of the activity theory and the last subdivision, which is treatment and decision portion, wraps up the treatment with deductions and sugge stions. 1.2 Describe Relevant Scholarship In this subdivision some surveies are reviewed in order to lucubrate some of the cardinal constructs in the survey such as, â€Å" restrictive † and â€Å" expansive † larning environment, â€Å" formal † and â€Å" informal † acquisition, and the activity theory. 1.2.1 Restrictive and Expansive Learning Environments While this survey is grounded in the context of an Persian school in which two different larning environments were experienced, I believe there is a demand to acknowledge the features of each environment. The thought of restrictive and expansive acquisition environment comes from the surveies of Fuller and Unwin ( 2006 ) on learner acquisition in four different companies. During their surveies Fuller and Unwin developed a conceptual model within which to do sense of chances and barriers in learner acquisition. Pulling on the thoughts of Lave and Wanger ‘s community of pattern theoretical account and Engestrom they classified larning environments as either expansive or restrictive. The following tabular array shows an altered model for instructor acquisition environment. Table 1. Expansive and restrictive acquisition environments for instructors. Beginning: Evans, Hodkinson, Rainbird, A ; Unwin, ( 2006, p. 53, Figure 3.1 ) Expansive acquisition environment Restrivtive acquisition environment Near collaborative working with co-workers Out-of-school educational chances, including chances to reflect and believe otherwise Explicit focal point on instructor acquisition as a dimension of normal on the job pattern Supported chances for personal development traveling beyond school or authorities precedences Colleagues are reciprocally supportive in heightening instructor acquisition Opprtunities to prosecute with working groups inside and outside of school Opportunities to widen professional individuality through boundry-crossing into other sections, school activities, and schools Support for fluctuations in ways of working and acquisition, for different instructors and sections Teachers use a broad scope of larning attacks Isolated, single working No out-of-school clip to stand back. Merely narrow, short preparation programmes No expressed focal point on instructor larning except to run into crises or imposed enterprises Teacher acquisition dominated by authorities and school dockets Colleagues obstruct or do non back up each others ‘s acquisition Work restricted to home departmental squads within school The lone chance to boundry cross associated with major alteration of occupation Standarised attacks to learning and teacher larning are prescribed and imposed Teachers use a narrow scope of larning attacks 1.2.2 Formal and Informal Learning Since one of the differentiation points between two different larning environments, viz. , expansive and restrictive, is on supplying support for fluctuations on acquisition, it is of import to acquire to cognize different types of acquisition. Marsick and Watkins ( 2001 ) qualify formal acquisition in contrast with informal acquisition as â€Å" institutionally sponsored, classroom-based, and extremely structured † ( p. 25 ) . For them informal acquisition is â€Å" incidental † and non classroom-based and extremely structured, and the control of acquisition is â€Å" chiefly in the custodies of the scholar † ( p. 25 ) . To clear up the impression they defined incidental as â€Å" a by-product of some other activity, such as undertaking achievement, interpersonal interaction, feeling the organisational civilization, trial-and-error experimentation, or even formal acquisition † ( p. 25 ) . As said by Eraut ( 2004 ) informal larning suggests more flexiblene ss or freedom for scholars. He believed that informal larning takes topographic point in a broader scope of scenes than formal instruction. This informal acquisition can take the signifiers of â€Å" conversations in the corridors or when sharing lifts with co-workers to the workplace ; detecting instructors ordaining their functions around a school ; and co-participating in normative patterns † ( Fox, Deaney, and Wilson, 2009, p. 219 ) . Eraut ( 2004 ) believed that nevertheless in informal acquisition, larning from other people is recognized as socially of import, but single bureau is more considerable than socialisation. He declared that informal acquisition plays a important function in professional development. Eraut declared that that in many scenes scholars experience both formal and non-formal acquisition. Although some bookmans acknowledge the significance of informal acquisition in professional development ( e.g. Eraut, 2004 ; Marsick, 2009 ) , Fuller and Unwin ( 20 06 ) pointed to Solomon ‘s concern about the recent accent on informal larning to state that this accent has â€Å" a negative side in that it may be sabotaging the demand to supply employees with chances to prosecute in off-the-job proviso as well † ( p. 29 ) . Fuller and Unwin added that harmonizing to Solomon ‘s position â€Å" supplying fewer off-the-job chances gives employees less opportunity to stand back and reflect critically on their pattern † ( p. 29 ) . 1.2.3 Activity Theory as a Theorietical Model As I mentioned before the instance of the Persian school under the focal point of this survey will be analyzed through the lens of activity theory. Indeed both larning environments, experienced at the school, will be scrutinized utilizing activity theory, in order to demo how each environment works for instructors in footings of acquisition and effectivity. Activity theory has had an germinating alteration from its development by Lev Vygotsky in 1920s. The first coevals of this theory, centered on Vygotsky ‘s suggestion, introduced the thought of mediation ( Engestrom, 2001 ) . Vygotsky ‘s thought of cultural mediation of actions is expressed â€Å" as the three of topic, object, and interceding artifact † ( Engestrom, 2001. P. 134 ) . This coevals of Activity Theory, nevertheless, is located on the degree of the person ‘s actions and does non exemplify â€Å" how cognitive alteration happens within a corporate context † ( Hardman, 2005, p. 2 ) . Vygotsky ‘s co-worker Alexei Leont’ev in 1981 clarified the differentiation between single action and corporate activity ( Engestrom, 2001 ) . The 2nd coevals of activity theory arose so out of Leont’ev ‘s three-level theoretical account of activity with its footing in the differentiation between action, operation and activity ( Engestrom, 1987 ) . However, â€Å" this theoretical account failed to develop Vygotsky ‘s theoretical account into one of corporate activity † ( Hardman, 2005. p. 3 ) . Engestrom in 1987 developed Vygtsky ‘s thoughts and introduced the 3rd coevals of activity theory ( Figure 1 ) : Figure 1. Components of the activity system ( Engestrom, 1987 ) Engestrom ( 2001 ) asserted â€Å" the 3rd coevals of activity theory needs to develop conceptual tools to understand duologue, multiple positions, and webs of interacting activity systems † ( p. 135 ) . Kutti ( 1996 ) defines activity theory as â€Å" a philosophical and cross-disciplinary model for analyzing different signifiers of human patterns as development procedures, both single and societal degrees interlinked at the same clip † ( p. 23 ) . As you see in the figure 2, activity theory is consisted of seven elements: Subject: the histrions engaged in the activity Object: natural stuff or job infinite at which the activity is focused ( Engestrom, 1993 ) . Tools: instruments facilitate the object of activity Community: the topics of an activity system with a common object Division of labor: horizontal and perpendicular division of undertakings and functions, power and position among members of the community Rules: explicit and inexplicit norms that control actions and interactions within the system ( Engestrom, 1993 ) Result: transmutation of the objects ; the overall mark of the activity system ( Jonassen, 2002 ) Engestrom ( 2001 ) uttered five rules that summarise his attack to the modern-day activity theory. In the first rule, he identified the activity system as the chief unit of analysis. In the 2nd rule he emphasized multi-voicedness of activity systems ; he argued that activity systems are communities of multiple points of position, traditions and involvements. In the 3rd rule Engestrom ( 2001 ) pointed to historicity of systems by stating that â€Å" activity systems take form and acquire transformed over drawn-out periods of clip † ( p. 136 ) . In the 4th rule he tried to demo the significance of contradictions by presenting them as beginnings of alterations and development. For him contradictions can ensue in tensenesss but besides transmutation in activity systems. In specifying contradiction Kuutti ( 1996 ) stated â€Å" contradiction is a misfit within elements, between them, between different activities, or between different developmental stages of a individual activity à ¢â‚¬  ( p. 34 ) . In the last rule he talked about expansive rhythm by adverting that â€Å" activity systems move through comparatively long rhythms of qualitative transmutations † ( p. 137 ) . 2. Method Because this survey seeks to understand how activity theory can be a utile model for analysing larning environments, it adopts an explanatory instance survey design. This is a survey on an Persian bilingual school in which both restrictive and expansive acquisition environments were experienced. In order to supply a better apprehension of the context, the research worker uses her observations and perceptual experiences as one of the instructors in the school upon which the survey is built. In each acquisition environment, either restrictive or expansive, by concentrating on contradictions as dynamic forces of alteration, we can show how we can track transmutation and better understand these transmutations within an activity system. In fact, contradictions can either authorise larning to come on, or they can curtail it, depending on whether or non they are acknowledged and fixed ( Nelson, 2002 ) . 3. Consequences 3.1 Restrictive Learning Environment From its constitution in 2002 up to its work on 2006, the school had a restrictive acquisition environment in which instructors did non back up each others ‘ acquisition. There were some Teacher Training Courses ( TTC ) for the instructors, every one time in a piece, to order and order some instruction schemes and criterions ; later the instructors had to learn precisely harmonizing to what they had been told. Teachers had to work separately and there was no civilization of collaborative acquisition. However some informal acquisition happened inside the schoolroom for the instructors, they did non hold the opportunity of speaking to the other instructors in order to hold more informal acquisition. Despite some efforts of the supervisors on the manner of supplying chances for instructor acquisition such as category observation and supplying feedback to the instructors, teacher preparation classs, and supplying some text books for the instructors, teacher larning was non admitted explicitly as a critical issue of the school. In such an environment emerging contradictions seemed inevitable. Figure 2 shows the activity system representation of such a restrictive acquisition environment by presenting elements of the system. Figure 2. An activity system representation of restrictive school environment 3.1.1 Contradictions in Restrictive School Environment School leaders ‘ belief was grounded on the thought that individualist acquisition is more effectual for instructors, so the instructors were encouraged to analyze separately. This thought nevertheless, was non in line with the human nature which has disposition toward communicating with others. The instructors were restricted to pass on with each other and this was in contradiction with their established patterns in the society. In the communities out of this school all of the instructors had chances to speak with other people and to larn from them ; so outgrowth of a contradiction between the topics particularly the instructors with the object was obvious ( subject/object contradiction ) . On the other manus the regulations of the school were in a manner that made the instructors stay off from each other. Harmonizing to the regulations, the instructors had to pass their java interruption clip in their categories and there was no chance provided for them to pass on with each o ther ( subject/rule contradiction ) . The school supervisors were supposed to supply such a acquisition environment in which the instructors ‘ acquisition happened in the most effectual manner ; in this manner, nevertheless, they were non supportive plenty. For illustration, one of the undertakings of the supervisors in each school is detecting the instructors ‘ categories and supplying feedbacks to them. In this school nevertheless, the supervisors observed each category merely one time in a twelvemonth, and this did non hold any added value for the instructors ‘ acquisition. In this manner the instructors had to oversee their ain actions and to go supervisors of themselves ( division of labour contradiction ) . Harmonizing to the 5th rule of the activity theory â€Å" as the contradictions of an activity system are aggravated, some single participants begin to inquiry and pervert from its established norms. In some instances, this escalates into collaborative picturing and a calculated corporate alteration attempt † ( Engestrom, 2001, p.137 ) . The contradictions inside this activity system were assumed as barriers in making the school effectiveness so as a consequence of facing these contradictions, the school initiated alterations in the system in order to decide the contradictions for the interest of better results. In this respect, a sort of expansive transmutation happened in the system. As Engestrom ( 2001 ) said â€Å" an expansive transmutation is accomplished when the object and motivation of the activity are reconceptualized to encompass a radically wider skyline of possibilities than in the old manner of the activity † ( p. 137 ) . In this sense, the object of the s ystem changed to expansive acquisition undertakings and consequently the tools changed in order to advance the object to run into the result of the system. 3.2 Expansive Learning Environment Harmonizing to Engestrom ( 2001 ) activity systems take signifier and acquire changed over long periods of clip. He adds that jobs and potencies of an activity system can merely be understood against it ain history. In this instance, the school environment as an activity system changed from being restrictive to being expansive in order to be more effectual in making the end of the system. This means that the instructors were encouraged to hold a close collaborative working relationship with the other instructors. Anchoring on this thought a new e-learning plan was introduced to the instructors as a manner of communicating with the other instructors of their ain school and the instructors of another school in Malaysia. The chief end of this plan was assisting instructors to pass on their jobs with each other and with their supervisors and to upgrade their cognition. In contrast with the old manner of the system, instructors ‘ acquisition was accepted explicitly as a cardinal con struct in the school and it was considered as a chief factor in the school effectivity. The e-learning plan was an on-line plan in which the instructors could entree online classs held by teachers from Malaysia. In add-on to this formal larning some informal acquisition chances were besides provided: the instructors could be involved in voice and picture confabs online with each other and with the other instructors from the Malayan school. They could besides inquire inquiries and discourse around a subject in a treatment forum. Figure 3 shows the activity system representation of such an expansive acquisition environment. Barb, Evans, and Baek ( 2004 ) believe that as one moves toward seeking to plan community, particularly one in which the members are expected to prosecute in new patterns that challenge their current civilization, many contradictions emerge. In this activity system presenting a new engineering and new patterns caused some contradictions in the activity system. Figure 3. An activity system representation of expansive school environment 3.2.1 Contradictions in Expansive School Environment Harmonizing to Engestrom ( 2001 ) one of the rules of activity theory is the â€Å" multi-voicedness of activity systems † ( p. 136 ) . This means that an activity system is a community of different points of position, histories, and involvements. This multi-voicedness as said by Engestrom may do some problems and contradictions. In our instance, after presenting e-program as a manner of communicating and coaction some of the instructors resisted engagement in the plan and some other were actively involved in the plan. This was largely because of their involvements and backgrounds. Some of the instructors were old instructors who had got used to individualist acquisition and treated such plans as a manner of â€Å" wasting clip † . Some others nevertheless, had found it a good manner of join forcesing with the others and work outing their ain jobs and the jobs of the other instructors. While in an expansive environment instructors are supposed to be reciprocally support ive in heightening their acquisition ( Evans et al, 2006 ) , in this instance the older instructors were non supportive plenty because of their background and involvements and this caused a contradiction between the divisions of labor of the system. On the other manus, as all of the instructors were non active scholars and some of them were inactive scholars a contradiction emerged between the topics ( topics contradiction ) . Furthermore, as mentioned before, in the instance that some of the older instructors preferred individualist acquisition and resisted affecting in expansive patterns we see a contradiction between topics and object which was â€Å" expansive acquisition undertakings and patterns † ( subject/object contradiction ) . One of the grounds for the instructors who resist engagement in the new undertakings was their deficiency of cognition in utilizing technological device such as computing machines or cyberspace ( subject/tool contradiction ) . In such a system a contradiction besides emerged between tool and division of labor. The debut of the e-learning plan and computer/internet as a tool required a new division of labor due in portion to the freshness of the tool but besides due to the fact that the supervisors were non able to help all instructors with the computer/internet undertakings. Consequently some instructors who had a better technological cognition became supervisors of the other instructors with the deficiency of cognition in utilizing new devices. One of the patterns in which the instructors were involved was go toing online classs held by Malayan teachers. Since the Persian school was a bilingual school, the teachers had some suggestions for pupils ‘ linguistic communication acquisition betterment. For illustration, they suggested that doing larning groups from the pupils and inquiring them to be involved in some reliable role-playing could better their linguistic communication proficiency. But they emphasized the thought that in each group both genders should be involved. This suggestion nevertheless seemed to be effectual, but was non applicable for an Persian school, because Persian schools are non co-education systems and male and female pupils, because of the Islamic regulations, can non be in a same system. There were besides some other suggestions which were incompatible with the school regulations ( tool/rule contradiction ) . This mutual exclusiveness of the instructions with school regulations made the instruc tors uninterested in the instructions because they thought that those instructions were non utile in their instruction systems ( subject/tool contradiction ) . There were some besides some other issues in the system which caused emerging some contradictions between the elements. One of these issues was low cyberspace velocity in Iran which de-motivated the instructors from utilizing e-program as a manner of communicating ( subject/tool contradiction ) . Harmonizing to Nelson ( 2002 ) contradictions can either ease acquisition to come on, or they can impede it, depending on whether or non they are acknowledged and resolved. Introducing a new plan to the instructors, as we saw, caused some contradictions. When the school system had a restrictive environment, the school leaders tried to decide the emergent contradictions due to the deficiency of communicating. When they decided to present the e-learning plan they believed that this plan could hold been a good manner for the instructors to pass on with the other instructors inside the school and outside of it. By presenting a new engineering, nevertheless, some other contradictions emerged that the school leaders had non anticipated. So alternatively of deciding the new contradictions they decided to eliminate the beginning of them which was the e-learning plan. Despite the huge sum of budget and clip devoted to presenting the new plan, the school leaders stopped the plan because they b elieved that the plan did non hold much added value to the instructors ‘ acquisition. 4. Decision This article began with the purpose of look intoing contradictions in different acquisition environments through the lens of activity theory. In order to show contradictions happening in different acquisition environments the article introduced a instance survey in an Persian school. However, as said by Hardman ( 2005 ) although â€Å" a instance survey does non allow one to do general statements about how something might be used in different state of affairss † , it does supply a deep description of the procedures underlying the object of the survey. Analyzing restrictive acquisition environment at the school under probe showed that most of the instructors were inclined to pass on with the other instructors for the interest of more acquisition. As one of the elements of expansive larning environment as said by Evans et Al ( 2006, is â€Å" chances to prosecute with working groups inside or outside of school † ( p. 53 ) , the e-learning plan could hold provided such an chance for the instructors. When the object and consequently the tools of the system changed and a new engineering was introduced to the instructors, some contradictions emerged. The lens of activity theory, as we saw, could supply insight into alterations in the instructors ‘ acquisition at workplace when a new technological tool became portion of their activities and communicating. In this instance some of the older instructors had some jobs with the new engineering or even with the new object ( expansive acquisition patterns such as communicating with the other instructors ) . If the school leaders and instructors tried to happen the contradictions and to decide them, the activity system could hold gone one measure in front to its end. For illustration, if merely a few Sessionss were devoted to learn computing machine and cyberspace accomplishments to the instructors, some of the contradictions could hold been resolved ; but when confronting with jobs caused by contradictions the school leaders eliminated the beginning of contradictions ( e-learning plan ) alternatively of look intoing the beginning of the jobs ( contradictions ) and deciding them. A s a affair of fact, presenting a new plan or engineering to any puting shifts participants ‘ established patterns to the new patterns, which causes some contradictions. It is of import that school leaders can place contradictions in their scenes and see how these influence school civilization and how to equilibrate them. Recognitions I would wish to thank Dr. Alison Taylor, the teacher of my â€Å" Workplace and Learning † class at University of Alberta, who guided me through this survey. How to cite Teacher Learning Through The Lens Of Activity Theory Education Essay, Essay examples

Othello Essay Research Paper In Othello many free essay sample

Othello Essay, Research Paper In Othello, many events are more important than others because of mental or psychological grounds. Shakespeare uses images to give contrasted ideas to different parts of the drama. Shakespeare besides gives the exhilaration to internal events by giving the character or characters feelings, such as being angry, sad, happy, and scared. Another thing is how a character changes his feelings in a brief minute. In the drama Othello, illustrations of these are, how Othello changes his trust from individual to individual, from Cassio to Iago ; Another is how he causes his married woman to be frightened of him. Besides there is the mental alterations of Iago and how he is out for retaliation. Othello # 8217 ; s character is the taking individual in the drama. The manner he feels gives prefiguration of what might be go oning following. When he trusted his lieutenant, Michael Cassio, he had many uncertainties about Iago. We will write a custom essay sample on Othello Essay Research Paper In Othello many or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Soon on, he changes his legal guardians, he stopped swearing Michael Cassio and started swearing Iago. From this, he started holding uncertainties about Cassio. Even though Othello trusts Iago, he still does non cognize that Iago is out to acquire retaliation from him. The ground he changed his head was because Iago was seting thoughts in his caput stating him that his married woman, Desdemona, is rip offing on him. This, non merely changes his head about who to swear, but it besides gives his character a great sum of energy. Something else that is mentally and psychologically interesting is how he has no trust in his married woman Desdemona. Most couples trust each other cognizing the other would neer seek to make anything to ache them. It # 8217 ; s different in the narrative though, Desdemona is highly trusting of her hubby neer aching her in any manner. But Othello is merely the antonym, he thinks that she is rip offing on him. This causes him to be ferocious. Even though Othello does non cognize the whole narrative, he still is angry and he does non set any attempt into swearing his ain Wisconsin iron when she tells him that she did non rip off on him. In add-on to this, when Iago tells Othello that he overheard Cassio naming out Desdemona’s name while in his sleeping Chamberss, Othello took it as he was naming her as a loved 1. He could hold been naming her name to seek to acquire advice about the existent adult female he loved, Bianca. But Othello is the type of individual who listens to his friends excessively much, and he did non candidly inquire his married woman and believed her. Even though everything is put out of proportion. Othello wholly distrusts Desdemona and he even strikes her. Even with this, she is still profoundly in love with him, but merely afraid of him. Another thing in the drama is the attitude of Iago towards everyone else. To Cassio, he is an honest individual with helpful advice. To Othello, he is besides honest, but in fact he is merely seeking to acquire retaliation on him. He is besides seeking to acquire retaliation so bad, he does non care who he has to travel through to acquire it. Much of his mental attitude, is to be a # 8220 ; jealous villain. # 8221 ; This is jealousy and how he is covetous of Cassio acquiring a higher rank than him with even less experience. In the narrative, he is really honest to many people, but merely toward them. Equally shortly as they turn their dorsum, he is a different individual thought of ways to acquire retaliation. In decision, William Shakespeare gives the drama # 8220 ; Othello # 8221 ; exhilaration and suspense by mentally altering a characters attitude. Besides he includes important events that bring more idea into the drama. He gives his trust of award to Michael Cassio at foremost, so he changes to Iago, merely because of a rumour that his married woman was rip offing on him. Besides there is the misgiving of the loving twosome. How he does non swear her and what she says. Even though she is stating the truth. Then there is Iago, the originator that causes all the jobs. It is largely because he is out for retaliation, and how he does non care who he uses or walks over to acquire it.

Kantian and Utilitarian free essay sample

Kant believed in an absolute moral law that he called the Categorical Imperative. It is this imperative that determines our duty. (2) Two formulations of this imperative can be used to determine the morally correct action that Alistair should choose. The first formulation, The Formula of Universal Law: Act only on that maxim through which you can at the same time will that it should become a universal law [of nature]. (2) Alistair has two possible maxims to act upon. These maxims, if it were universally applicable, are: â€Å"Anyone may lie in order to promote increasing human welfare† and â€Å"Everyone always tells the truth†. The first maxim is contradictory. If people had the option to lie, it negates the system of trust on which the world is built. When, for example, I put my money in the bank, I trust them to keep it safe. If the first maxim was universally accepted, I could not trust without reservation that the bank would keep my money safe because they would be able to give my money away if they felt it would increase the welfare of those less fortunate. We will write a custom essay sample on Kantian and Utilitarian or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page If this was the case, there would be widespread mistrust and, ironically, it would have a negative impact on human welfare. The second maxim is universally applicable and is thus, according to Kant, the maxim on which to act upon. The second formulation, The Formula of the End in Itself: â€Å"So act as to treat humanity, both in your own person, and in the person of every other, always at the same time as an end, never simply as a means. †(2) If Alistair were to withhold the truth about the bribery, he denies the rationality of the board and denies that there is any rational action for them to perform. He denies them the option to rationally make a decision on what to do about the situation. In doing this he is using the board merely as a means to ensure the delivery of the medicine. According to Kant, for Alistair to use the board as a means in themselves, he would have to tell the truth. According to Kant’s theory, the action of ignoring the bribe fails the first and second formulation of the Categorical Imperative, thus the right thing to do would be to tell the truth to the board of directors. Utalitarian Theory Looking back at the case study it is clear that, on the one hand, people are receiving inexpensive kits of medicine, the drivers don’t get shot and the reputation of the relief organisation and the director is still intact. On the other hand, the board doesn’t know about the bribery, thus the unethical activity cannot be put to a stop. Utilitarianism is a theory based on consequences, not the action leading to the consequence. This theory holds that we should choose those actions that would result in the greatest amount of good in the interest of the greatest number of people affected by our actions. 1)(4) The â€Å"good† is anything that, directly or indirectly, brings happiness or pleasure. (4) The consequences of each particular action is considered to determine which outcome will best serve the greater good. (3) Act Utilitarianism prescribes that every situation be evaluated independently. The action that leads to the greatest net outcome of utility is then c onsidered to be the correct choice. According to this theory, Alistair should choose the action that will maximise happiness and minimise unhappiness. Alistair has two possible choices with two different consequences. The first is that Alistair tells the truth about the bribery. The possible outcome of his choice are the following: the drivers stop receiving cash and get shot, the contract is terminated and the less fortunate stop receiving their medicine, the director in charge of the contract is fired, and the relief organisation suffers great embarrassment. These are all negative effects and cause great unhappiness. On the other hand, the happiness of the board is increased because they can put a stop to more unethical activity. The second choice that Alistair has to consider is to keep silent and overlook the bribe. This would lead to the situation staying the same (as stated in the case study) and would secure the happiness of the greater good which include: the director, the relief organisation, the drivers and the people receiving the medicine. The board of directors would not know about the bribe, so there would be no unhappiness to consider. Considering the consequences of both actions, the happiness of the greater good is maximised when Alistair keeps silent.

Otto von Bismarck essays

Otto von Bismarck essays Otto von Bismarck was born at Schonhausen on I April 1815. Bismarck came from a Pomeranian Junker family. Bismarck grew up in the powerful German state of Prussia. When Bismarck was young, he was a big man due to eating and drinking too much; he was always ready for a duel. Bismarck wore a full beard for long periods of his life. Bismarck went to the best Berlin grammar school; then he went to study laws at the University of Gottingen in Hanover and University of Berlin. After qualifying the examination, Bismarck entered Prussian civil service and became a judicial administrator at Aachen. His career in the civil service was not a success. Bismarck served there for a short period of time. When he finished serving Bismarck was 24. Bismarck married with Johanna von Puttkamer when he was 30. Bismarck believed that he shared the same belief with the God in making Prussia strong and in unifying Germany; he had once said, You would not have had such a Chancellor if I had not the wonderful basis of religion (21). In 1847, Bismarck became a member of the united diet. Bismarck opposed every liberal proposal. In 1848, the ideals of French Revolution spread to Germany. There was a popular uprising of liberals in Germany. Conservative Bismarck opposed the liberal revolution in 1848. In 1851, Bismarck gained prominence and was chosen to become the Prussian delegate to the Federal diet when he was 36. During the Crimean War, Bismarck convinced the government to refuse to mobilize army of the German Federal diet to help Austria in Balkans. Bismarck saw no point to help Austria: I dont recognize any right in foreign policy (29). Bismarck also worried that it might alienate other countries. Thus, Prussia stayed neutrality. During the 1850s, Bismarck served Prussia as a diplomat at the Frankfurt Diet of German states. During his years at Frankfurt, Bismarck only concerned about the conflict wi...

Patriot Act Research Paper Example | Topics and Well Written Essays - 1250 words

Patriot Act - Research Paper Example Though there is some opposition to this act, with the opponents arguing that it has some abuse on the civil liberty and discourages free speech (Mascaro, W06). The opponents also argue that the act jeopardizes the privacy and the freedom of the American citizens, by legalizing the surveillance of their private life activities by the government. However, this notwithstanding, the act has gone a long way in ensuring the safety of the American people against terrorist attacks. Through the ability to intercept telephone lines and internet messages, the act allows the government to spy all the activities of the terror groups and individuals, and serve to apprehend those involved in such plans, just before the attack is full-blown (Mac Donald, 23). The act has many other provision all meant to guard against the planning and execution of criminal and terror attacks within the US and its other areas of Jurisdiction. Under this section 215 of the Act, the director of Federal Bureau of Investi gations (FBI) or a designee of the director may make an application for an order requiring the suspected individuals to produce anything tangible may it be books, papers, documents, for use in investigation against international terrorism (Mac Donald, 11). Such applications are to be made to a judge, who then grants the director such orders authorizing the suspect to produce such tangibles. However, such orders shall not disclose that they are issued for such investigations (Steranko, 36). The information that the FBI has sought such tangibles is not to be disclosed by any one, the person from whom they are sought inclusive. This section has served to protect the lives of the American people against terrorism. This is because, it allows the intelligence agencies to investigate suspected terrorists well in advance and that guard against a likelihood of them organizing and perpetrating terrorist attacks (Keller, A2). For example, this section allows the FBI to wiretap communication or obtain an order to search a home of an individual they suspect is an agent of foreign power, or a member of a terror network, without prior notice of search a search to the individual. The only concern the opponents raises is that there is no adequate protection against such violations occurring in the future. The section has effectively eliminated the limitations associated with specific target people and group from whom the materials and information is to be sought, since it is not possible to predict who the terrorist and the criminals are. By providing for the acquisition of such information from any one and any place, the provision ensures a complete coverage of all areas that are likely to be sources of terrorist threats, even when such sources are disguised. This is important, since libraries and bookstores can be a vital source of information for the terrorists and criminals. Section 805 of the Patriot Act makes provisions, which makes any offer of material support to terro rist or terrorist organizations in the US illegal (Mascaro, W06). The definition of crime under this section is broadened to illegalize the provision of support to include monetary instruments, financial securities, and any form of expertise advice or assistance (Steranko, 38). This section has served to protect the American people from terrorist attack, through ensuring that no support is obtained domestically by the terrorist from their terror networks or

Customized Competitive Intelligence in International Environment Essay

Customized Competitive Intelligence in International Environment - Essay Example The authors believe that it is a continuous process of assimilating environment information about the changing socio-cultural and political environment within which business operates. Businesses fail not because of lack of competency and financial backup but because of failure to exploit the cultural competencies of the new market and market paradigms. The qualitative research has used wide array of literature and interview with 12 CI consultants, working in different countries to provide guidelines and approach for effective CI. CI is primarily the methodology of gathering of information about the changing business paradigms across the countries with business potential. It provides the business with strong database of knowledge that can be judiciously exploited to gain and maintain competitive advantage. CI is a complex process and must be understood within the broader context of varying socio-cultural, political and legal imperatives of the nations. The understanding of various ext ernal factors facilitates in collecting relevant and authentic information that can be exploited by businesses for sustainable growth across globe. Research has analyzed CI practices for developed and developing nations where the scope of expansion exists for US firms which are as follows: 2. CI in developed countries Applications of CI practices are different for myriad reasons which are distinct in their perspectives vis-a-vis culture, technology, political and legal environment etc. 2.1 Europe European Union has huge market potential but cultural diversity across nations necessitate cross cultural understanding. Business must use different strategies to glean information about businesses in different European nations. Telephonic and email is acceptable and cost effective means of communication. Face to face interview should only be followed for competitors. Language barrier is important factor and native language, wherever possible, should be used to gain trust. CI practitioners must flexible in their approach and be prepared for differences in opinions. They must also corroborate data from wide sources. Last but not the least important is that 2-3 weeks before and after main holidays must be avoided as Europeans tend to focus on their holiday plans or busy finishing their backlog. 2.2 Japan Japan has maintained its technological superiority in digital goods like camera, electronics goods etc. in the international market. Government facilitates CI support to its domestic businesses which, unfortunately, they do not exploit due to lack of analytical tools. But at the same time, it also offers huge business potential for international firms. Due to government support to CI practices, Japan lacks publicly available data regarding businesses. CI practitioners should therefore, focus on developing trust which is critical factor in Japanese culture and use social networking to collect information. 3. Developing countries These are emerging markets which offer hug e scope of business opportunities for international businesses. Due to socio-cultural diversity and different political systems across emerging economies, CI practitioners need to be discriminatory in their approaches while gathering information. 3.1 China It is one of the most important and fastest growing economy which uses CI approach to exploit new opportunities across the globe. There is huge competition in the Chinese market which makes CI practices an intrinsic part of

China,Japan and Korea Essay Example | Topics and Well Written Essays - 1000 words

China,Japan and Korea - Essay Example This form of government was in existence since 1644 to 1911 and it had a number of dynasties, for instance Xia, Shang and Tang (ChinaI 2). Though this form of system was in existence for a long period, it had a number of faults that were the main reason for its fall. According to historical studies, some of the problems associated with this form of political system were that it was marred with not only nepotism but also corruption (ChinaI 11). For instance, court officials themselves were corrupt to the extent of planning intrigues against one another. Citizens were levied high amounts of money in form of taxes that the government spent on undertaking expensive military expeditions. Another example of the poor political system emerged during Mao Zedong era. Mao’s form of government was quite dictatorial that no one would dare oppose his opinions. Since not everyone loved Mao’s form of governance, this resulted to the Cultural Revolution in 1966 that lasted for one decade (ChinaVI 3). During the revolution, Chinese students openly criticized the government. The case was similar during Deng Xiaoping reign whereby students were also unhappy with the form of governance, hence held protests in Tiananmen Square. After turning down the order to vacate the square, Deng sent an army to disrupt the protest that resulted to massive loss of lives, most of whom were students (ChinaIV 18). Just like China, Japan also had numerous issues due to poor ancient political systems. Historically, the Togukawa government ruled Japan. The system comprised of shogun, daimyo and the samurai (Japan V 3). Apart from collecting taxes, the Togukawa government also had the task of controlling cities in addition to maintaining civil order. Japan had both formal and informal institutions; informal institutions comprised of Zoku and Amakudari. Whereas Zoku was a policy tribe comprised of politicians working together for a

Tribological Audit Of Rolling Element Bearings

Tribological Audit Of Rolling Element Bearings 1. INTRODUCTION: In the current scenario, conservation of material and energy is very much important. As the principal cause of material wastage is wear, any reduction in wear leads to savings. Friction is the main cause of wear which leads to energy dissipation and damage to equipments. [1] Friction occurs when one surface drags upon another surface. The magnitude of frictional force depends upon the interaction of mating surfaces. All surfaces consist of minute asperities and depressions even though the surface has high degree of finish. From close observation it is clear that frictional force is produced due to the distortion of the micro asperities when one surface slides over the other. As most of the surfaces are elastic up to a limit, the original shape is regained afterwards. In extreme cases the asperities get removed due to plastic flow of materials. [4] This process of removal of material from one or both of two surfaces in contact is known as wear. [6] Lubrication is the most effective me thod to lower the friction and to control wear and tear. Lubrication is the process of interposing a solid liquid or gaseous lubricant in between two surfaces in relative motion in order to decrease wear and tear. [6] Tribology is the science of interacting surfaces in relative motion and of related subjects and practices. [5] Tribology is derived from the Greek word Tribos which means rubbing. It deals with relative motion of the bodies, friction, wear and lubrication. The motion of the bodies includes sliding, rolling, spinning, bouncing or combination of these. [5] The written history of tribology is as old as about five thousand years. In olden days itself people were concerned about friction and the ways to reduce it. Assyrians used rollers made of wood to move massive stones. [2] Later carts are developed as rolling friction is less than sliding friction. Although the ways to reduce friction was highly concerned from the olden days itself, the word tribology was introduced in 1966. [5] The minimum film thickness in tribological machine elements was in the order of 10 µm to 100 µm at the start of the century. Later advance in the tribology led to the development of components with film thickness up to 1 µm. The thickness is further reduced to 0.1 µm by the end of the century. In short, tribolo gy in the important factor in design of machine elements and selection of lubricants. [5] 2. ROLLING BEARINGS: Invention of wheel led to minimise the effort of moving an object as rolling friction is less than that of sliding friction. Even though rolling motion produces less friction, man was seeking different ways to decrease the rolling friction. This led to the discovery that bearing based rolling motion consumes less power. Hence it was implemented in all rolling systems including complex machine mechanisms. In earlier periods the roller bearings was not able to compete with the hydrodynamic sliding bearings as it cannot meet with the endurance characteristics of the other. The roller bearing was universally accepted in the 20th century by the development of superior bearing materials and advanced techniques. This helped to manufacture roller bearing assemblies with extreme accuracy and long life. The competition among the manufacturers increased in early 1970s which led to a sudden increase in the production of high quality products at relatively low costs. [2] Rolling bearing includes all types of bearings to permit minimum friction between two moving surfaces relative to one another. The main application of roller bearing is to rotate a shaft relative to some fixed or oppositely rotating structure. It also allows relative linear motion of a fixture in a fixed direction provided by a stationary shaft. [3] Usually a bearing consists of two steel rings each of which consists of a hardened raceway. The hardened steel balls or rollers roll in these raceways. These rolling elements are usually held in an angular spaced structure which is called separator or retainer. [2] ball.gif Figure 1- Ball Bearings [7] There are different types of roller bearings based on their analysis of operation. A brief description on various types of bearings is explained below. 2.1 BALL BEARINGS: 2.1.1 Radial Ball Bearings: Radial ball bearings are the most popular rolling bearings. This type of ball bearings has an inner and outer raceway grooves in between the balls are inserted. The grooves have curvature radii of about 53% of the size of the ball diameter. The inner groove is concentrically fixed inside the outer groove and the ball bearings are present in between the grooves. The bearings are separated uniformly. A cage is used to maintain the separation. Deep groove ball bearings have the capacity to carry more loads as it is having large ball diameter. It can carry radial as well as thrust loads. Seals are present to keep the lubricant in and protect from external dirt. [2] Figure 2- Radial Ball Bearings [8]radial-bearings.jpg 2.1.2 Angular Contact Ball Bearings:406px-Angular-contact-ball-bearing_single-row_din628_type-b_120.png Angular contact bearings are designed to withstand heavy thrust loads or a combination of both thrust and radial loads. The ball bearings have a contact angle which does not exceed 40 degrees. Single and double row ball bearings are usually used depending upon the nature and magnitude of force to withstand. In this type of ball bearings, the outer raceway is the part of a sphere. The load applied on the outer raceway is minimised as the balls do not conform well into it. By using large balls the load on each ball can be minimised. This type of bearings can be used in applications where the parallelism of shaft and the housing are not exact to each other. [2] Figure 3- Angular Contact Ball Bearings [9] 2.1.3Thrust Ball Bearings: thrust-ball-bearing_din711_ex.png Thrust bearings are those bearings having a contact angle of 900 which can withstand thrust loads. These types of bearings are meant for high speed applications. The thrust bearings are mounted on spherical seats to obtain high degree of alignment ability. These bearings cannot be used to hold any radial loads. [2] They are mainly used in automotive, marine and aerospace applications. These increase smoothness and help in noise reduction thereby reducing friction in the attached part. Small size, reduced friction and long life are the main advantages of thrust bearings. [10] Figure 4- Thrust Ball Bearings [11] 2.2 ROLLER BEARINGS: Roller bearings are used in applications where the bearings have to support very high loads. Rollers are used in these bearings instead of balls. In these roller is cylindrical in shape and so line contact is formed between rollers and raceways. This spreads the load out a large area. Hence they have more load supporting capability. [12] They supply more fatigue endurance than ball bearings. Also the cost of manufacturing is high. These bearings consist of two concentric raceways which consist of rollers in between the two. To increase the load carrying capacity, cylindrical bearings with two or more rows of rollers are constructed. Different types of roller bearings include needle roller bearings, tapered roller bearings, thrust roller bearings and spherical roller bearings. [2] Roller-Bearing.jpgLB_OP_Linear_Motion_Bearing_250x250.jpg Figure 5- Roller Bearings [13] Figure 6- Linear Motion Bearing [14] 2.3 LINEAR MOTION BEARINGS: Linear motion bearings are the recent products developed in order to provide free motion in one dimension. In machine tool slide ways, very high friction is developed. Linear motion bearing consists of balls which carry the loads laterally in a particular direction and hence wear and tear can be minimised. They provide smooth, precision, guiding surface. The rolling element of a linear bearing rides over it thereby reducing friction. [15] 3. TRIBOLOGICAL FACTORS: Tribology deals with friction, wear and lubrication. The two key factors related to tribology are interacting surfaces and relative motion. It is clear that tribology is concerned with two surfaces in relative motion which are adequately close to one another. Usually a poor tribological interface is designed and then various lubricants are used to lower the friction between the surfaces. The most acceptable way is to design a better interface which includes the selection of a good lubricant also to minimise the friction and wear to the lowest. [5] Various tribological factors are to be taken into consideration while taking a situation. The important tribological factors include: Material Surfaces Lubricants Operating Conditions [5] 3.1 MATERIAL: The initial step to be taken while designing a product is the material selection. There are various factors which are taken into consideration while selecting the material. For tribological point of view the following factors are to be given importance before material selection. Basic Mechanical Properties Friction Wear Resistance Compatibility [5] 3.1.1 Basic Mechanical Properties: The basic mechanical properties of the material such as elastic modulus, Poissons ratio, yield stress, hardness, fatigue resistance, ultimate tensile strength and thermal conductivity are to be analysed. [5] Also the availability and cost of the material are also taken into account. Based on these observations the best material suitable for the manufacturing of bearings is selected. The selection of material used for bearings is to be done carefully based on standard specifications. The material plays an important role in the performance of the bearings. This affects the overall performance of the machinery also. The selected material is used to manufacture the load bearing parts of the bearings like raceway grooves and balls or rollers only. Retainers and cages are made from some other soft materials with desired qualities. [17] 3.1.2 Friction: Friction is the resistance offered by two interacting surfaces in relative motion. The degree of friction is denoted by coefficient of friction  µ. [6] Friction occurred during sliding is known as sliding friction and which occurred during rolling is known as rolling friction. The main factors which cause friction are adhesion between surfaces, surface hardness, asperities etc. [6] 3.1.2.2 Laws of Friction: There are different laws of friction which are applicable to dry friction between interacting surfaces. The first and second laws were put forward by Leonardo da Vinci and third law was introduced by Coulomb. [6] The first law of friction states that force required to initiate or sustain sliding FT is proportional to FN, the normal force. [6] Thus FT ÃŽ ± FN or FT =  µ.FN [6] Where  µ = Coefficient of friction The second law of friction states that the friction force FT is independent of the apparent area of contact Aa [6] The third law of friction states that friction is independent of sliding speed. [6] It was found that the first two laws of friction are obeyed in almost all experimental conditions. Lubrication systems can be used to lower the friction developed within the bearings. Friction in bearings depends upon the viscosity of lubricant and shear rate. Self lubricated bearings are widely used as it offers only very low friction. [20] 3.1.3 Wear: Wear can be termed as the material loss or volume loss from the surface of the materials in contact. [21] The main types of wear occurring on material surfaces are adhesive wear, abrasive wear, fatigue wear, corrosive wear. The local pressure at the asperities becomes extremely high when the normal pressure is acted upon the mating surfaces. When the pressure exceeds a certain limit, the asperities deform plastically until the area of contact increased sufficiently to withstand the load. The wear produced due to adhesion process has been explained by Archard equation. Wad = K [22] Where Wad = wear rate K = wear coefficient F = normal load H = hardness of softer material When two dissimilar materials slide over one another, the softer material gets scratched away. Thias type of wear is called as abrasive wear. Fatigue wear occurs when a rotating shaft is subjected to reversal of bending stresses. Corrosive wear is due to the reaction of the material surface with the environment or an external agent. [6] Wear occurs in ball and roller bearings due to corrosion, shock loading of fatigue. Atmospheric agents like dirt and girt are the other external factors which are responsible for wear. [4] 3.1.4 Compatibility: Alloys are usually selected as bearing materials. Alloy is a solid composition consisting of two or more metals and elements in fixed proportions. The two alloys which are used to manufacture the bearings are Chrome Steel and Stainless Steel. Steel is an alloy of iron and carbon. [17] Various other elements like silicon, manganese, phosphorous, sulphur, chromium and molybdenum are added in chrome and stainless steels in order to increase the strength, hardness and corrosion resistance of the alloys. [18] Carbon is used in the alloy to form cementite structure and to formation of pearlite, spheroidite, bainite, and iron-carbon martensite. This improves hardenability of the alloys up to 0.65%. Wear resistance is increased up to 1.5%. Toughness of the alloy reduces and the brittleness increases when carbon is added. Manganese increases the hardness penetration of steel. Chromium is added to increase hardness, toughness and wear resistance to steel. Silicon acts as the deoxidiser during the manufacturing process. [19] 3.1.4.1 Chrome Steel Chrome steel is one of the widely used alloys to manufacture bearings. It is used mainly in high load bearing applications as this material is capable of withstanding very high loads. The machinability of the material is as high as highly finished, less noisy bearings are obtained. Also the life of the bearings is also very high. Under test conditions, the Rockwell hardness of the material is observed as 60 64 C. This material is used in applications where corrosion is not considered. [16] The constituent elements in the chrome steel are given in the table 1. 3.1.4.2 Stainless Steel The standard material used for the bearings is 400 series Martensitic Stainless Steel. This type of steel is highly resistant to corrosion and hence stainless steel bearings are used in applications where corrosion is to be taken into account. It is having less load withstanding capacity when compared to chrome steel. There are three types of 400 series Stainless Steel suitable for making bearings. These materials are developed by manufacturers to be used for certain specific applications. [16] 3.1.4.2.1 DR Stainless steel This material is highly resistant to corrosion and is used in applications which deal with highly corrosive medium. The material can be precisely machined so as to obtain high degree of finish to the surface of bearing. This helps in smooth, low noise operation of the bearings. The Rockwell hardness of the material is observed as 58 60 C. [16] The chemical composition of the material is given in table 2. 3.1.4.2.2 AISI 440C Stainless Steel AISI 440C Stainless Steel is highly resistant to corrosion and is easily available. But it is not widely used now a day when more modern materials are developed. The Rockwell hardness of the material is 58-60 C. [16] The chemical composition is given in table 3. 3.1.4.2.3 ES1 Stainless Steel: This material is highly resistant to corrosion and has high machinability. Thus highly finished surfaces can be produced. The material is having a Rockwell hardness number of 58 60 C. [16] The composition of the material is given in table 4. 3.2 SURFACE: Surface quality of the materials is one of the major tribological factors which determine the efficiency of the product. [4] Surface finish decides the amount of friction and wear of the material. Surface texture and conformity are the terms which are to be given importance. 3.2.1 Surface texture: The surface of the material is the part which interacts with the environment. The surface may not be highly finished due to several reasons. It may be due to the imperfections caused during manufacturing, due to external agents or due to loads acting on the surface. The deviations observed on the surface can be mainly classified into three which includes roughness, waviness and error of form. [23] Roughness is the surface irregularities which consist of rises and valleys. This creates an uneven surface pattern. Waviness is the small ups and downs on the surface which is having less amplitude that of roughness. These may be caused due to work piece deflections, vibration or heat treatment. Error of form is the slight deviations from the nominal shape. [6] The surface profiles can be traced by using different apparatus like Abbott profilometer, Tomilson surface finish recorder and Talysurf surface finish recorder. [4] 3.2.2 Conformity: Conformity is the degree of agreement between the surfaces. [5] An interface consisting of two plates is said to have high conformity. Journal bearing is an example for high conformity material. An interface consisting of a plate and a ball is said to be having low conformity. Ball bearing is an example for low conformity material. Conformity is an important factor which is to be considered as it has an important role in determining the pressure, shear stress and temperature in the interface. [5] Figure 7- Surface Texture [23] 3.3 LUBRICANTS: Lubrication is the technique employed to reduce wear by the interposition of a solid, liquid or gas between the two surfaces which come into contact with one another. It was a persistent problem for man for centuries from the day he used to move materials. Friction consumes and wastes energy whereas wear leads to the damage of the equipment which are undesirable and it has to be avoided at any cost. Every moving part of machinery is subjected to friction leading to wear and tear which has to be avoided. Lubrication plays a vital role in avoiding the friction between mating surfaces. The history of lubricant begins thousands of years before. It was found that the ancient Egyptians used lubricants to avoid friction in the wheels of chariots. [24] In ancient times lubricants were of animal, plant and marine origin. Later mineral oils were started to use as lubricant. The new science of lubrication based on hydrodynamics came in 1880s. [24] Lubricants are of solids, liquids and gases but liquid lubricants are widely used. These include mineral oil, synthetic oil, grease, vegetable oil and water. Lubrication is done by applying a thin film of lubricant between the surfaces in contact. [6] Thus undesirable problems like friction, wear, noise and vibrations can be reduced to a very high extent. 3.3.1 Viscosity: Viscosity of a lubricant is the main characteristic which is taken into account before selecting it for a specific application. Friction, heat generation, film thickness and load carrying capacity depend upon the viscosity of lubricant used. Generally viscosity can be stated as the hindrance of the fluid to flow. But based on lubrication, viscosity is the measure of ability of fluid to maintain lubrication at specific operating conditions. [24] 3.3.2 Lubrication Regimes: Lubrication can generally be classified into four different regimes based on the thickness of the fluid film in between the surfaces in contact. They include: Hydrodynamic Lubrication Boundary Lubrication Mixed Lubrication Elastohydrodynamic Lubrication 3.3.2.1 Hydrodynamic Lubrication: image8.jpg Figure 7- Hydrodynamic Lubrication [25] In hydrodynamic lubrication, a fluid film is formed in between the two surfaces in contact. Thus one surface floats on the other and there occurs no direct contact between the surfaces. In microscopic level the surfaces of the materials consist of asperities. In normal condition without lubrication, the asperities are in direct contact with each other. When one surface slides over the other, the asperities get deformed producing friction and hence wear. Hydrodynamic lubrication helps avoid the friction as there is no direct contact between the surfaces. The viscosity of the lubricant helps to increase the fluid pressure in between the surfaces. Thus the lubricant layer holds the surfaces apart. As the lubricant layer formed is thicker than the surface roughness of the material, one material slides over the other without damaging the surface. It is observed that the thickness of the film is more than 1 µm. [24, 25] The surface is separated apart by hydrostatic lift. A fluid flowing over a surface immediately takes the speed of the surface. Similarly when the fluid moves in a converging gap, the pressure increases and the surface is lifted. [25] 3.3.2.2 Boundary Lubrication: Boundary lubrication is a type of lubrication in which the surface roughness of the material is same as that of the fluid layer thickness. Thus when one surface moves upon the other, the asperities comes into contact. When load is applied the asperities gets plastically deformed which leads to friction and wear. As friction is not desirable different methods are also adopted to reduce friction in this type of lubrication. This includes the use of various additives to the lubricants. The additives are classified according to the surface action exhibited on the material surface. They are mainly of three types. Physically absorbed layers Chemically absorbed layers Chemical reaction layers 3.3.2.2.1 Physically adsorbed layers: When the lubricant is applied, it forms a layer on the material surface. The weak intermolecular force called van der Walls force exerted by the layer of the lubricant helps to attach to the surface. This layer lubricates and allows the other surface to slide over the other without causing friction. As the lubricant is not undergoing any chemical reaction, the process is reversible. The bonds formed by van der Walls force are weak and it can be removed. The main disadvantage of the physically adsorbed lubricants is that they have a temperature limit above which the lubricant melts. 3.3.2.2.2 Chemically adsorbed layers: Chemically adsorbed layers are those formed due to the chemical reaction with the surface material. Chemisorption is a type of adsorption in which the molecules are hold tight by the valence force of the molecules of the lubricant. The bonds created are stronger than the physically adsorbed layers. Usually chemically adsorbed lubricants form long chain fatty acid molecules, which has high affinity to metal surfaces. Fatty acid additives like stearic and oleic acid forms chemically adsorbed layers. The typical thickness of the boundary film is about 3 µm. As chemical reaction takes place in the interface, the adsorbed layer can be removed only under extreme conditions like high temperature, vacuum or by using some chemical treatments. [26] 3.3.2.2.3 Chemical reaction layers: Chemical reaction layers are formed by the reaction of additives in the lubricant with the surface of the material on which it is applied. In this adsorption is not taking place, instead a chemical reaction that bonds the lubricant and the material occurs. Thus the layers formed are permanent. The main disadvantage of physisorption and chemisorptions is the temperature limit above which the lubricant gets ineffective. In this type of reaction the working temperature is not a factor. Hence this type of lubrication is used in high speed and high load operating systems as high temperature is developed in these cases. Zinc dialkyl dithiophosphate (ZDDP) is widely used as an additive to produce effective chemical reaction films. [24] 3.3.2.2 Mixed Lubrication: Mixed lubrication has the features of both hydrodynamic lubrication and boundary lubrication. In hydrodynamic lubrication the contact surfaces are separated apart by the pressure of the lubricant interposed between the surfaces. Hence there will not be any contact between the two surfaces in motion. But in boundary lubrication, one surface rests on the other. When the surface moves the asperities gets plastically deformed which causes friction and wear. Mixed lubrication acts between the two extremes of hydrodynamic and boundary lubrication. In mixed lubrication regimes a fluid film layer is developed where contact takes place between the asperities of the surfaces. Thus a slight deformation is formed while sliding occurs which is highly desirable. The film thickness ranges from 0.05 µm to 0.1 µm. [25] 3.3.2.3 Elastohydrodynamic Lubrication: Elastohydrodynamic lubrication is a type of lubrication which brings together hydrodynamic lubrication, hertzian contact and change in viscosity with pressure. In this method of lubrication, the surface is modified to minimise friction. Elastohydrodynamic lubrication is used in applications where low conformity and highly loaded tribological interfaces are present. Roughness of the wearing surface is taken into consideration in this lubrication. Roughness is taken as the average of high and low points of the surface which is called as the centreline average. [27] A non conformal contact can produce pressure to a very high level. When the pressure increases it directly affects the viscosity of the lubricant. In normal conditions the viscosity of the lubricant is less noticeable but during elastohydrodynamic lubrication the viscosity increases which makes the lubricant act as a semi solid. This creates a thin film of oil in between the mating surfaces. [25] 3.4 OPERATING CONDITIONS: Operating conditions are the main aspect to be taken into account while designing a mechanical component including bearings. There are different factors which comprises the operating conditions. Load Relative Motion Temperature Environment 3.4.1 Load: The load applied on each ball and roller is to be determined to manufacture the bearings which can operate at the desired applications without failure. In order to calculate the load deflection relationship is to be developed for roller element contacting raceways. In almost all the applications the outer or inner raceways is in steady state rotation. The speed of the rotation may not be large enough to affect significantly the distribution of the load equally on each roller or ball elements. The rigidly supported bearing is subjected to radial load which may lead to deflection. The radial deflection at any rolling element is given by ÃŽ ´ÃË† = ÃŽ ´r cos ψ  ½ Pd [2] Where ÃŽ ´ÃË† = radial deflection r = ring radial shift ÃŽ ¨ = angular location Pd = diametral clearance Thrust load and roller bearings are also subjected to thrust loads which are distributed equally among the rolling elements. The thrust load can be calculated using Q = Fa / Z Sin ÃŽ ± [2] Where Q = thrust load Fa = applied load Z = number of rollers per row ÃŽ ± = contact angle 3.4.2 Relative Motion: Relative motion is the motion of either one or both surfaces with respect to each other. There are different forms of relative motion depending upon the style of motion. They include sliding, rolling, spinning and bouncing. Sliding refers to the smooth movement over a surface maintaining the contact between each other. Rolling is the movement by revolving within the axis. Spinning is the rotation of a material within its axis. Bouncing is the rebounding due to an impact. Chance for sliding occurs in the rolling bearings due to thrust loads. Bouncing may occur due to sudden fluctuation in loads which may lead to destruction of bearing material. 3.4.3 Temperature: Operating temperature is a factor which is to be taken into consideration for the smooth functioning of the bearings at load conditions. Temperature rise may occur in the bearings during operation which may be due to different reasons. One factor which causes the rise in temperature is the application of excess load. If excess load is applied, the material may not be designed to withstand that much high load. So it may lead to failure. Another reason for the temperature rise is the absence of lubricant. The lubricant should be interposed to the surfaces in contact. If it fails to continuously supply the lubricant to the surface, friction is produced which results in gradual rise in temperature. Various coatings are also used to overcome temperature extremes. 3.4.4 Environment: Nature of environment is the feature which can influence the efficiency and life of the bearings. There are different agents which affect the operating conditions of the bearings which may be harmful. These include contaminations like dust, wear particles, air, water, process fluid etc. Insulations are to be provided to avoid exposure to these external agents. This can be done by using seals or coatings. 4. CONCLUSION: The various tribological factors are to be considered while designing rolling bearings. This tribological audit looks for the different factors which affect the performance and life of the bearings. The major tribological factors found include material, surface, lubrication and operating conditions. Different solutions are available which can be applied to each factor to lower the friction. Material should be wisely selected which can be easily machined to obtain highly finished surfaces and should possess the strength to withstand the loads applying on it. The material should be selected according to the application. Surface texture and conformity of the material is to be carefully observed as the surface finish is one of the major factors which cause friction. Lubrication plays a major role in the performance of the equipment. Right method of lubrication is selected. Elastohydrodynamic lubrication forms the film with minimum thickness which is the most desirable in bearings. Operat ing conditions affects the performance and life of the bearings which includes contaminations like dirt, wear particles, water, corrosive process fluid etc. Proper measures are to be taken to avoid exposure to these agents. From this audit it is clear that we have to take care of the tribological factors and select the most suitable ones to obtain maximum performance and life to the rolling bearings.

Funerals of Kings Essays -- Literary Analysis, Beowulf

Beowulf starts with the death of Shield a great king in the eyes of the Geats, it also ends with the death of Beowulf. These funerals are similar in many ways. These funerals can be a reflection of the lives these kings lived because each king had his own way he wanted to be remembered. These funerals both involve huge amounts of treasures being loaded on to ships or back in to the ground and how the Geat people mourned for the loss of the kings.†¨ Treasures were used to gain loyalty from other men in Geat â€Å"steadfast companions will stand by him† (Beowulf 23). Theses â€Å"steadfast companions† (Beowulf 23) help the king survive and help conquer lands and allowing a king to stay in power. In the end of this poem even those gifts will not get the support Beowulf needs. The treasure that was laid on the boat for Shield was â€Å"Far-fetched treasures / were piled upon him, and precious gear† (Beowulf 36-37) A â€Å"far-fetched treasure† (Beow ulf 36) would be some of the rarest in the world. Shield has told his men to â€Å"Shoulder him out to sea’s flood† (Beowulf 30) The boat they put him in was â€Å"A ring-whorled prow rode in the harbor, / ice-clad, outbound, a craft for a prince†(Beowulf 32-33). The description of the boat I think shows the honor that the Geat’s wanted to show their kings and how ornate they make things. At Beowulf’s funeral at the end of the poem they build a great pyre â€Å"The Geat people built a pyre for Beowulf, / stacked and decked it until it stood foursquare.†(Beowulf 3137-38). The pyre is like the boat in the first funeral the boat is built ornately and to stand the test of time. The pyre is built to be tall and strong very similar to the boat. â€Å"hung with helmets, heavy war-shields / and shining armor, just as he had ... ...going or where the â€Å"to wind and tide, bewailing him† (Beowulf 49). They built a memorial on the high grounds letting all that can see know that a great king laid there. All the treasure that had been found in the cave where the dragon had stayed was put back in to the ground where the memorial is. â€Å"They let the ground keep that ancestral treasure / gold under gravel,† (Beowulf 3166-67). These treasures had been around for ages and ages, gold is taken from the ground and in the end put back in to the ground. These kings have thought about how they wanted to be remembered by the people of the time. Their funerals reflected back on their lives, through the gold that was laid on to Shields ship and that was put in the memorial on the coast for Beowulf. Works Cited Greenblatt, Stephen. The Norton Anthology Of English Literature. 8th. A. W W Norton & Co Inc, 2006.

Fin Understanding

Understanding the Concepts Professor Ingrain P. Nelson Fin 100 Introduction to Finance December 1, 2012 1. Imagine you are a small business owner. Determine the financial ratios that are important to the business. Compare your ratios with those that are important to a manager of a larger corporation. As a business owner, financial understanding is something that has to be studied before you decide that you are going to open or even start a new business. Small businesses in general run the finance operations of their business in a different way than the larger corporations.Most of the small businesses must rely on the personal investors or personal resources to access money needed to be a successful business. It does not matter if it is a small business or a corporation; being a successful business depends on having the capability to make more than what is being paid out. Now that we have a little understanding of what it will take to start the business; we must have knowledge of the different types of ratios that will help us with this. The main three ratios that are used in the business world are the current ratio, total debt ratio, and profit margin.The current Asia is a measure of the company ability to pay off its short-term debt as it comes due (Melcher & Norton). This ratio is computed by dividing the current assets by the current liabilities. Total debt ratio is Just what you think it is; the total amount of debt the company has. The total debt ratios are total debt or total liabilities of the business and divide it by the total assets. Profit margin is simply how much profits (money) is made during the operation or while the business was open if you had to close it down.Net income is divided by sales in order to show the profit. All of the three ratios are used to no matter how big or small your company seems to be. 2. Explain the advantages and disadvantages of debt financing and why an organization would choose to issue stocks rather than bonds to gen erate funds. If you run into the problem of the current ratio showing that you have the inability to cover the costs of the business then, debt financing may be the best solution for this problem. As we know with all financial options, there are some advantages and disadvantages of any company or business.The first advantage for debt financing is that it allows the menders or the owners of the company to maintain control and ownership of the company. A second advantage would be that the interest paid on the loan may be tax deductible depending on the type of loan. The best part is the lenders you borrow money from do not share in your profits. The main disadvantage is the risk of credit ratings getting ruined or filing for bankruptcy (Palaver, n. D. ) As an organization; they can choose to either issue stocks or bonds to help generate funds for the company. Most of the time they prefer to issue stocks over bonds.Stocks are a form of winnowers; they represent participation in a compa ny's growth (Investigated). A between investors and institutions that, in return for financing, will pay a premium for borrowing, known as a coupon (Investigated). When it comes to the obligation of repay the principle on the stocks you have none; now for the bond you must pay it on the date of maturity. The inertest of the bond has dividends, but the company only pays the dividends when the company makes a profit. The stocks have a fixed interest rate that has to be paid at a specific time. 3. Discuss how financial returns are related to risk.We know that how the returns work is the greater the risk the greater the returns. The more you invest the more you will get back in returns. The relationship between financial risk and return is the gain or the lost from investments or securities. Just because you have chosen to take a higher risk does not mean that your return will be as high as the risk you took. There are five factors of model investment risk shows risks in terms of credit risk, term risk, market risk, size risk, and price risk. The return on an investment can be measured by a real rate which is what is earned after inflation has been figured into the value.The market, size, and price factors are the link between risk and return (Risk and return are related – Wealth Foundations, n. D. ). Now the beta stock is one factor that will help to determine the risk. 4. Describe the concept of beta and how it is used. A stocks beta is the measure of an asset's systematic risk and the relative risk (Melcher and Norton). Beta also measures the volatility or variability of an asset's returns relative to the market portfolio (Melcher and Norton). The assets of the company are more volatile than the market. If the company has a greater systematic sis than the market then the betas are greater than 1. . Even though the total risk and the sum of systematic risks are all measured by beta, they are equal and they are all measured in different units. Total risk i s measured in percentages and beta is unit less. The rules of how the beta works can be very easy to understand. The beta value will always be greater than 1 if a stocks price moves more than the stock market. If the value of the beta is less than 1, the stock market is moving more than the stocks price. Increased volatility of stock price equals higher risk for the investors ND a higher expected return, therefore betas over 1 are riskier.Betas under 1 are the exact opposite. These stocks have fewer risks, less volatility, and smaller overall returns. (Stock Beta and Volatility, n. D. ) 5. Contrast systematic and unsystematic risk. As mentioned in the above paragraphs, ownership of stock does not come without risks. The types of risks are categorized as systematic and unsystematic risks. The risks are very similar to each other; in that they are both affected by news and represent changes in a stocks return. The combination of these two risk types is noninsured the total risk. At th is point is where the similarities between the two risks end.Systematic risks, also known as non-diversified risks, are common risks that affect all stock. This risk is the portion of an asset that can be linked to market factors that influence all firms (Marina, 2010). The market for the systematic risk is the news, such as hurricanes, war, or an increase in interest rates, that links with the investments of the company. When things like this happen the investors do not have control; and now this presents a higher risk for the stockholders. Now that the hysteretic risks cannot be mitigated through diversification, they require a risk reward for buying a risky stock.The risky premium is determined solely by the systematic risks of a security. In addition to the risk premium, stockholders expect high returns because of the high risks posed by systematic risks. (Weakened, Kismet, ; Skies, 2011) Unsystematic risks or diversified risks are independent risks that only affect a single com pany or industry. The risk indicates a portion of an asset that is related to random causes that are linked to firm-specific events (Marina, 2010). The types of unsystematic events are to be made by the company or the industry specific news.When a merger happens between two companies this is what falls into the unsystematic risk category. Also other industry factors and events such as labor unions, strikes, lawsuits, and marketing strategies are a unsystematic risk. The changes that happen resulting from the independent risks are unrelated across investments. If the company has one unsystematic event that may happen, this will not have an effect on the entire outcome of the portfolio. Since the risk was so low this meaner that the stock will not be able to receive a risk premium. They can, however, diversify their portfolio to eliminate unsystematic risks.The elimination of the risks lowers the return an investor can expect (Weakened, Kismet, ; Skies, 2011). 6. Imagine your manufact uring corporation has Just won a patent lawsuit. After attorney and other fees, your corporation will have about $1 million. Explain how you plan to invest the money in order to diversify the risk and receive a good return. Support your decisions with concepts learned in this course. If my manufacturing corporation has Just won a patent lawsuit, I would have to take advantage the financial concepts that I have learned in this class such as financial management, stock and bonds, and the financial risk.I would use these concepts in order to diversify the risk and receive a good return. I am not for sure as to how much was awarded before the attorney and other fees but, only about $1 million will remain. This money will be invested into different portfolios that would help to diversify the risks that I will be taken not that I have money to do that with. Taking about half of the money to invest in multiple companies that have the potential to row and I can see where it would grow. I wo uld buy shares; this will give me the long term investments.