French Speaking Countries Essays - Monaco, Principalities

French Speaking Countries Name of country / Nom de pays: Islamic Republic of Mauritania / La republique de Mauritanie Capital City / le Capitale: Nouakchott Monetary Unit / Monnaie: Ouguiya Population / Population: 2,667,859 (July 2000 est.) Current head of State / Celui qui est gerant: President Col. Maaouya Ould Sid Ahmed TAYA Attraction / Attraction: Name of country / Nom de pays: Principality of Monaco / Principaute de Monaco Capital City / le Capitale: Monaco Monetary Unit / Monnaie: French franc Population / Population: 31,693 (July 2000 est.) Current head of State / Celui qui est gerant: Prince RAINIER III Attraction / Attraction: Name of country / Nom de pays: Republic of Niger / Republique du Niger Capital City / le Capitale: Niamey Monetary Unit / Monnaie: Communaute Financiere Africaine franc Population / Population: 10,075,511 (July 2000 est.) Current head of State / Celui qui est gerant: President Mamadou TANDJA Attraction / Attraction: Name of country / Nom de pays: Canada Note: Quebec is the only French speaking province in Canada Capital City / le Capitale: Ottawa Monetary Unit / Monnaie: Canadian dollar Population / Population: 31,281,092 (July 2000 est.) Current head of State / Celui qui est gerant: Queen ELIZABETH II Attraction / Attraction: Name of country / Nom de pays: Rwandese Republic / Le Ruanda Capital City / le Capitale: Kigali Monetary Unit / Monnaie: Rwandan franc Population / Population: 7,229,129 Current head of State / Celui qui est gerant: President Maj. Gen. Paul KAGAME Attraction / Attraction: Economics Essays

Greek Achievement essays

Greek Achievement essays When discussing ancient civilizations, one of the most prominent has to be the Greek civilization. Under the rule of various rulers, Greece saw a change from a pagan worshiping society that was almost abolished, to an enduring civilization that strived on philosophy, and intellectual thought. As the Greeks dispensed the gods in political life, they based government on human intelligence. The evolution of the Greek polis, or city-state, from a tribal-religious institution to a secular rational institution, that is regarded as one of the greatest in the history of mankind, was only a part of the general transition of the Greek mind from myth to reason. What separated the Greeks from other Near Eastern civilizations, as well as gave it enduring significance, was the Greeks gradual realization that political problems are caused by man and require earthly solutions. The Greeks also had a strong belief in their system of the city-state but it eventually would contribute to their demise. These city-states allowed for much separation within their political life, and thus was the cause for much suffering. Greece would endure two major wars, which would shape their civilization, and have a lasting effect. First was the Persian Wars with Sparta. Because Sparta was a walled city, and couldnt compete with the Athenian culture, Athens eventually triumphed. One of the most fascinating contrasts in this war is how different the two city-states could be. Athens was located on the peninsula of Attica, near the coast, possessed a great navy, and was a commercial leader for the Greeks. Sparta was a land power and was exclusively agricultur al. Spartas leaders pursued an isolationist foreign policy, and believed in keeping their freedom on the homeland. The Athenians had such things as democracy, and extended their hegemony over the Greeks. Unfortunately, after the long battles between Athens and Sparta were finally laid ...

The style of mini skirt in 1960s Essay Example | Topics and Well Written Essays - 1250 words

The style of mini skirt in 1960s - Essay Example Historically, miniskirts have existed since the onset of civilization. However, they have aroused cultural implication and powerful political connotations in recent years. The origin and sustenance of miniskirts have a deep historical context. This article explores various historical contexts of miniskirts as determined by culture, designer, artist, materiality, and model. Miniskirt strongly communicates the breaking loose from cultural strains that bound the young people to older dress codes. Just like the young generations in 1960s, the modern day youths are driven by the need to be different. Placing things into perspective, miniskirts are among the changes that reflect cultural expression. The cultural context of miniskirts can be understood in three significant perspectives. One is that the world is changing rapidly. In this instance, the adoption of miniskirts can be attributed to some of the changes the world was undergoing at the time. For instance, the television sets were being invented, the cameras were being introduced and diversified functions of computers were being implanted among other changes.2 The Cultural context of miniskirts is also marked by aspects many aspects such as attitude changes to existing fashion. Lifestyles and technological advancements significantly shape the behavior and attitude of many young people. Civil rights, the rights of women and concerns over environment were shaping the minds of various young people. The last dimension of the cultural context of miniskirts is the new cultural expressions. The youths had much money to spend than ever before. Many economies had grown particularly in the stability of the aftermath of WWII. They probably spent a lot of the money they had on clothes. Furthermore, during the time, there were several boutiques, which changed their merchandise often. All those

Preparing and Electronic Portfolio Essay Example | Topics and Well Written Essays - 500 words

Preparing and Electronic Portfolio - Essay Example They include; 1. Definition of portfolio context and goals-this is the step whereby the purpose of the portfolio is defined. It’s important to ask oneself what is it that you are trying to show with this portfolio. For instance are there any goals, outcomes or standards that are being exhibited using this portfolio? You will realize that you are prepared for the following stage when; firstly, you have been able to identify the purpose as well as the primary addressees for your portfolio. And secondly when you have identified the standards or objectives that you will be utilizing in organizing your portfolio. And finally, you have been able to select the development software you will be making use of as well as completed the initial stage using that specific tool. 2. Classification/Collection –Some of the questions one needs to ask here include; what type of artifacts will be included in the portfolio and how are such entries going to be classified? This stage therefore involves identification of various portfolio items which may be determined by assessment context as well as the kind of evidence that is to be collected. Selection of the most suitable software development tools for the portfolio context together with available resources. This stage also involves identification of the storage together with presentation medium most suitable for the given situation. 3. Reflection-Reflection generally is the soul and heart of any portfolio. It provides the basis for why these artifacts symbolize attainment of a specific result, objective or standard. The excellence of the learning that comes out of the process of portfolio development will be directly proportional to the excellence of the self-reflection put on the work. 4. Interaction/connection/feedback/dialogue-this is the step that offers an opportunity for not only interaction but also feedback on the kind of work placed in the portfolio. Apparently, this is

Discuss three examples how HIPAA is taught, practiced, and enforced in Research Paper

Discuss three examples how HIPAA is taught, practiced, and enforced in a health care organization. What is HIPAA and why it shou - Research Paper Example It was also designed to prevent employers from hiring persons due to medical conditions that may affect the cost of their job-related group insurance. Under its rules, there is a six month limit for denying coverage for preexisting conditions under employee provided health plans. Specifically, unless an employee has received diagnosis or treatment for a pre-existent condition within six months prior to being hired then they cannot be denied coverage for the issue (http://www.dol.gov/ebsa/faqs/faq_consumer_hipaa.html). A secondary purpose of HIPAA is to protect patient confidentiality. It regulates who can access medical records, the reasons they may do so, and the proper they follow. In most cases, it forbids individuals or organizations from looking at a person’s records without their permission. HIPAA must be followed for ethical as well as legal reasons. Because of its importance, a wide variety of health care and insurance professionals must be trained in HIPAA compliance. Training is offered in several formats, including online. The website http://www.ehipaatraining.com/ offers Internet-based classes on the subject. The Department of Health and Human Services offers similar resources on the web page, www.hhs.gov.

Criminology Essays Left Realism Critique

Criminology Essays Left Realism Critique Left Realism Critique. Left realism emerged as an influential theory during the 1980s. Its drive was partly dissatisfaction with the dominant criminological perspectives of the time and partially attributable to the prevailing political climate. This essay will outline the emergence of left realism as a means of explaining its main principles. The discussion will also engage with the criticisms of left realism and identify the criminological perspectives with which it conflicts. An understanding of left realism cannot be gained without an awareness of the prevailing intellectual, ideological and political context that surrounded its emergence. Therefore, it is important to appreciate the background from which left realism emerged. In the period immediately preceding the genesis of left realism, the most prevalent and influential criminological perspectives were based largely upon Marxist theories based upon notions of utopianism that were increasingly coming to be viewed as irrelevant in light of the political ethos of Margaret Thatchers Britain (Jones: 2001, 245). In particular, left realists were extremely critical of the way that radical criminological theories presented a characterisation of criminals as political catalysts against bourgeois hegemony and therefore to attempt to explain criminal behaviour in terms of it being a revolution against the injustices imposed upon the majority of the population by the ruling classes (Moore, 1991). Radical criminological theory saw crime as a consequence of (real or imagined) economic deprivation and under-privilege. Left realists were opposed to this view which allocated responsibility for crime to the State, which was seen as an instrument of the ruling class designed to consolidate the position of the powerful and promote the interests of the rich and powerful, rather than with the individual offender. Left realists also objected to the characterisation of the offender as the victim of the labelling process; a view which was popular with symbolic interactionists who were providing a popular alternative voice to the radical criminologists during the late 1970s and early 1980s: For over two decades [criminology] has neglected the effect of crime upon the victim and concentrated on the impact of the of the state through the process of labelling on the criminalIt became an advocate for the indefensible: the criminal became the victim, the state the solitary focus of attention, while the real victim remained off-stage (Matthews and Young, 1986: iv). The rejection by left realists of these constructions of the offender demonstrated one of their central beliefs which was that the offender should be not be absolved of responsibility for his actions and that it was not appropriate to cast blame on either the institutional or structural nature of society as was the tendency of the radical and interactionist schools of criminological thought. Rather than concur with this characterisation, left realists saw criminals as well-socialised individuals who exercised conscious and rational choice in deciding to offend and who saw crime as a way of resolving their particular problems. For left realists, the problems that offenders were trying to solve came from the capitalist ideology that was predominant in 1980s society. Left realists saw this capitalism as producing egalitarian notions such as that of political equality and the deterioration of views that each individual had an immutable place in the social hierarchy that was pre-determine d at birth. With these views came feelings of deprivation amongst those who were not possessed of material wealth but who were desirous of the benefits that were enjoyed by other members of society. Left realists felt that these individuals would see criminal enterprise as a way of rectifying this perceived inequality and securing their access to the commodities of capitalist society which they craved (Hopkins Burke, 2005: 220). In this respect, left realism could be seen as promoting a return to traditional Marxist views whereby crime was seen as an individual response (by the offender) to structural inequalities created by those in power in society which actually was a counter-active diversion away from the real problems of the causes of these inequalities that could only be solved by political change. Left realism rejected the post-Marxist radical theories that characterised crime as a revolutionary endeavour. In their seminal work, Lea and Young (1984) depicted criminal behaviour as almost an amplification of capitalist normalcy. In other words, the dominant view in the 1980s was that of capitalistic self-advancement in which individual endeavours were rewarded with material gain. Lea and Young asserted that a significant percentage of criminals shared these beliefs and replicated what had become conventional social values based upon the value of individual (and self-interested) effort in a society based upon competition and motivated by material success. However, criminals did not channel their energy into legitimate pursuits such as the endeavour for advancement in employment or entrepreneurial success, preferring instead to pursue socially acceptable goals through illegitimate avenues (criminal activity). As such, left realism viewed crime as the expression of capitalist values but though non-conventional means. In one respect, left realists agree with radical theorists in that it is common ground that crime is a reaction to an unjust society (Lea and Young, 1984: 45). However, there is also disagreement in that, unlike radical criminologists, left realists do not believe that the criminal should not be blamed for responding by engaging in offending behaviour: Crime is one form of egoistic response to deprivation. Its roots are in justice but its growth often perpetrates injustice (Lea and Young, 1984: 72) This notion of crime as the illegitimate manifestation of capitalist values is one of the central principles of left realism. However, although crime is seen as a self-interested and individual enterprise, left realists also believe that crime is a group response rather than an individual decision. They believe that crime is an inevitable consequence of a social situation in which a particular group feels that it is subject to disadvantage such as in a situation whereby there is a common ideological drive to measure success in material goods but there exist barriers to the attainment of these goals for some members of society. In such a situation, particularly if there appears to be no way of circumventing the obstacles, crime is certain to result. One of the key criticisms that has been levelled against left realist explanations of crime and criminality is that its focus on economic deprivation explains only economic crime but does nothing to account for the other manifestations of offending behaviour that are prevalent in society. Left realism is prepared to counter this criticism by drawing upon strain theory (Merton, 1968) to explain how the exclusion from legitimate economic opportunity may result in financial crime to rectify the situation or violent crime as a vent for frustration at the denial of a seemingly equitable access to benefits and resources. This actually consolidates one of the key principles of left realism in that reliance is placed upon subculture theories to support the argument of left realism that those who are excluded from the benefits of mainstream society develop their own cultures, norms and principles and operate within these. Inevitably, for those excluded from legitimate avenues of enterprise, t his involves criminal behaviour (Young, 1975). One of the central principles of left realism was a conceptualisation of crime that did not take an offender-centred view. Young proposed a square of crime in which the four key components were the offender, the victim, the agencies of formal control (such as the police) and the agencies of informal control (such as other members of society). This was an important tenet of left realism because it challenged a major paradox within radical theories; that of the powerless working-class criminal driven to offending behaviour as a result of the oppression of the privileged classes. Lea and Young examined official crime statistics and victim report surveys (such as the British Crime Survey) and concluded that although members of the working class appear to commit a disproportionate amount of crime, they often target the other members of the working class as their victims. Left realism addressed the issue of the ordinary victim of crime and thus changed the emphasis within criminological th eory and, gradually, within the practices of the criminal justice system. In particular, the square of crime ensured that crime prevention strategies were evolved which took account of the contributions of each of the four factors: To control crime from a realist perspective involves intervention at each part of the square of crime: at the level of the factors which give rise to the putative offender (such as structural unemployment), the informal system (such as lack of public mobilisation), the victim (such as inadequate target hardening) and the formal system (such as ineffective policing) (Young, 1986: 41). This emphasises one of the main principles of left realism; the belief in a joined up approach to tackling the problems of crime. However, this multi-causal approach that takes account of a variety of factors in explaining criminality could be accused of borrowing from a range of sociological explanations of crime, such as strain and control theories, and amalgamating selected aspects of these and giving them a Marxist slant. It seems reasonable to state that there is nothing particularly new in left realism; it is a pragmatic restatement of a number of established criminological principles taken from a particular ideological perspective (Downes and Rock, 2003: 292). However, left realism did become influential in raising awareness of the plight of victims of crime thus negating their invisibility and overcoming their marginalisation. Lea and Youngs studies showed that official statistics gave an incomplete picture of the extent of victimisation and therefore presented an inaccurate impression of the nature and extent of criminal activity. For Lea and Young, victim studies gave a fair more comprehensive and accurate account of victimisation, firstly because they included information about crimes which had occurred but which victims may not have reported to the police and, secondly, because they were capable of analysis on the basis of geographic location thus giving a true impression of the localised nature of much criminal behaviour. One of the other most notable contributions of left realism to criminological theory that emerged from victim surveys is the recognition of fear of crime as a significant social problem that is just as in need of re solution as actual crime . By acknowledging the existence of victims of crime, left realists gave voice to notions of pre-emptive strategies to counteract attempts at criminal behaviour: The organisation of communities in an attempt to pre-empt crime is of the utmost importance (Lea and Young, 1984: 267). This emphasis on the community and its role and importance in combating crime typifies the principles of cohesion and inclusion that characterises left realism. At its core, left realism is seeking for realistic strategies that will have a quantifiable impact upon crime (and fear of crime) within communities, especially amongst the poor and disadvantaged who are the most frequent victims of crime. This has been said to be a central component of contemporary left realism (Matthews and Young, 1992: 2). Notwithstanding this emphasis on the prevention of crime, it is a fundamental principle of left realism that the attainment of justice is more important than controlling crime. As such, the police play a key role in maintaining social control by establishing, maintaining and nurturing good community relations so as not to alienate the populace to whom they should be fully accountable (Kinsey, Lea and Young, 1986). Many of the criticisms levelled against left realists were voiced by the radical theorists of whom the left realists themselves were so critical. For example, Lea and Young criticised radical theorists for their excessive concentration of corporate crime and their marginalisation of real crime that affects ordinary people even though they accept that corporate crime is worse than working-class crime. Radical theorists counter by questioning why Lea and Young are prepared to view working-class crime as more serious merely because it is what ordinary people fear. Surely, it is argued, the actuality of crime is more potent and more serious than the fear of falling victim to a crime that may never occur. Left realists have no effective rejoinder for this criticism, other than to draw attention to the way in which fear of crime can have a real and negative impact upon ordinary members of society, by preventing them from going about their ordinary business, for example, or avoiding particu lar activities or places (Young, 1999). The multi-causal approach of left realism can also be criticised for failing to explain all forms of criminal behaviour. Feminist criminological theorists have also been critical of left realism in its tackling both of female criminal behaviour and of its failure to explain crimes that are traditionally seen as targeting women, such as rape. Just as it could be criticised for failing to provide an adequate explanation of different types of criminal behaviour, left realism can be accused of an overly one-dimensional focus on young, male, working-class criminal behaviour to the detriment of offenders from other socio-demographic backgrounds. Female criminality is largely unaddressed and, moreover, exposes a central weakness in one of the key principles of left realism; the reliance on relative deprivation as an explanation of criminal behaviour. For example, Lea and Young assert that crime results from the exclusion of a particular group from legitimate opportunities for success and material gain. In light of this, it would be expected that female criminality, which was always extremely low, would decrea se even further as women gained greater equality in the workplace as this would ensure that they were less excluded from legitimate avenues of success. However, the converse proved to be true and the greater prominence of women in the workplace was mirrored by a growth in female offending; an outcome that is directly contrary to the explanation of criminal behaviour propounded by left realists (Smart, 1989). Equally, it is difficult to see how left realism can explain sexual crimes against women unless this falls within the same category as violent crimes that are the result of frustration following a failure to achieve legitimate success. This seems an extremely tenuous argument for such complex crimes and, in any case, left realists have tended not to engage with the issue of rape to any great degree thus the explanation remains speculative (Heidensohn, 1985). Overall, it is clear that the emergence of left realism was both a product of the prevailing political climate and a strong influence on the social and political development of more cohesive approaches to crime control and prevention that drew together a range of players in the criminal justice process rather than focusing exclusively on the offender. As a theoretical perspective, it expanded the focus of criminological enquiry and moved beyond the dominant ideology of the 1970s and early 1980s. As such, its contribution to criminological debate cannot be under-estimated. However, it can be criticised as a rather narrowly-focussed theory that fails to provide an adequate explanation of the full gamut of criminal behaviour. It has, however, provided a building block upon which other theories can build a broader and more wide-ranging explanation of criminality. Bibliography Downes, P. and Rock, P., (2003) Understanding Deviance, 4th ed., Oxford: Oxford University Press Heidensohn, F., (1985) Women and Crime, London: Routledge Hopkins Burke, R., (2005) An Introduction to Criminological Theory, Cullompton: Willan Jones, S., (2001) Criminology, 2nd ed., London: Butterworths Kinsey, R., Lea, J. and Young, J., (1986) Losing the Fight Against Crime, Oxford: Blackwell Press Lea, J. and Young, J., (1984) What is to be Done About Law and Order, Harmondsworth: Penguin Press Matthews, R. and Young, J., (1992) Issues in Realist Criminology, London: Sage Publications Merton, R., (1968) Social Theory and Social Structure, New York: Free Press Moore, S., (1991) Investigating Crime and Deviance, London: Collins Educational Publishers Smart, C., (1989) Feminism and the Power of the Law, London: Routledge Young, J., Left Realism and the Priorities of Crime Control in Stenson, K. and Cowell, D., (eds.) (1999) The Politics of Crime Control, London: Sage Publishing Young, J., Ten Points of Realism in Matthews, R. and Young, J., (1986) Issues in Realist Criminology, London: Sage Publications Young, J., Working Class Criminology in Taylor, I., Walton, P. and Young, J., (eds.) (1975) Critical Criminology, London: Routledge

Solutions, Dilutions and molarity calculations

Why is a conical flask, rather than a beaker, used in the experiment? – To allow easy mixing of solutions by swirling. 2. Why is the funnel removed from the burette after adding the acid solution? – so that the drops from the funnel will not fall into the burette. 3. In using a burette, why is it important to (a) rinse it with a little of the solution it is going to contain? – to remove any residual water and so avoid dilution of the acid solution when it is poured into the burette. (b) to clamp it vertically? – to enable the liquid level to be read correctly. ) to have the part below the tap full? – to ensure that the actual volume of liquid delivered into the flask is read correctly. 4. Give one reason for carrying out the following procedures during the titration. (i) The sides of the conical flask were washed down with deionised water? – To ensure that all of the acid added from the burette can react with the base. (ii) The conical flask was frequently swirled or shaken? – To ensure complete mixing of the reactants. 5. Why is a rough titration carried out? – To find the approximate end point.This nformation enables the subsequent titrations to be carried out more quickly. 6. Why is more than one accurate titration carried out? – To minimise error by getting accurate readings within 0. 1-3 cm of each other. 7. Explain why hydrochloric acid is not used as a primary standard? – The exact concentration of any hydrochloric acid solution is not known, unless it is prepared from standard ampoules. Laboratory grade hydrochloric acid is not sufficiently pure. 8. Can any of the following be used as primary standards: NaOH, H2S04, HN03? Explain your answer.A primary standard should be available in a highly pure state and stable. None of these substances are available pure because: (a) NaOH readily absorbs water and carbon dioxide from the air. (b) Concentrated H2S04 readily absorbs water from the ai r. (c)HN03 breaks down releasing N02 gas. 9. If you used only 10cm3 of sodium carbonate solution in the conical flask, calculate how much acid would be required to neutralise it. x 10-3 moles Na2C03 10cm3 Na 2CO 3 solution used at concentration of 0. 1 M 1 2 x 10-3 moles HCL required Concentration of HCL is 0. M 1000 x 2 x 10-3 / 0. 23crn3 required = 10. 5crn fi13. 10. Describe briefly how a pure dry sample of sodium chloride could be obtained having carried out the titration? – Using the information provided by the titration results, add Just enough hydrochloric acid to exactly neutralise 25cm 3 of sodium carbonate. The indicator should not be added. Gently heat the solution until all the water has evaporated to dryness. A sample of sodium chloride will remain in the beaker. Solutions, Dilutions and molarity calculations By AbigailHerbert

Case study Technique Essay

In psychology, cases study is the use of descriptive research and analysis to obtain in-depth information about a person, group, or a phenomenon. Case study is conducted using techniques such as direct-observation of the person, personal interviews, psychometric tests, and use of earlier researches archived (Dunbar, 2005). Psychology uses a case study often in clinical research to explain an unusual occurrences and conditions of the patient. The conditions are contrary to the pre-established principles in the fields of psychology and clinical research. Most of the case studies are single-case design; however, there is multiple-case design where instead of using sampling, replication is the criterion for use. Case study in psychology ought to be valid, and reliable to help in the future psychological research. This paper explains the reasons, disadvantages, and advantages of the case study. Reasons for Using Case Study Case study allows the researcher to examine and gather information about persons in far more detail than if the research was on a large number of people. Although the case study is not a research method, clinical and psychological researchers identifies methods of data collection that is suitable for the case study (Goodwin, 1995). For instance, observation, interviews, personal notes, and officially documented records. The reason for the case study is to investigate into the private lives of persons with the focus of understanding them and helping them in overcoming the problems that they experienced in their daily lives. Advantages and Disadvantages of Case Study Case study allows the researchers to collect detailed information about a person that is useful. The information would not have been obtained by the other research methods. The information obtained during the case study is richer and is greater in depth compared to the other experimental designs. Moreover, the research considers rare cases where large samples of similar people are not available. Scientific experiments on the person done during the process of study are also an advantage (Dunbar, 2005). The process enables the researchers to adapt to ideas and come up with a hypothesis that  will be a point of reference in the future research. On the contrary, the data collected during the case study cannot apply in a wider population. This makes the data not be useful in longitudinal case studies. In addition, some of the studies are not scientific in nature (Goodwin, 1995). They are only a generalization of the scientific principles. The study considers only one individual; therefore, the study is prone to the researcher biases. The bias of the experimenter can influence the conclusions more than in the other study designs. It is also difficult to prove the effect from the psychological case study (Dunbar, 2005). A case study is often prone to be more time consuming than the time used in other study designs. Sources of Case Study Data The case study research generates data from different sources. The researchers use field notes to record data that is already available in stored databases. The use of sampling where one person is examined to represent a wider group is also a method of case study data collection. In addition, questionnaires, observations, and interviewing are other methods used to collect case study data. In conclusion, the study tends to collect qualitative data. The psychological case study is important since it collects unique and in-depth data about a person. Mainly, the rare phenomena and conditions allude to case studies. Finally, it is vital to refer to the recorded data to ensure that the findings are accurate and applicable in the real life situations. References Dunbar, G. (2005). Evaluating research methods in psychology: A case study approach. Malden, MA: BPS Blackwell. Goodwin, C. J. (1995). Research in psychology: Methods and design. New

Investigate the factors which affects the distance travelled by a tub propelled by an elastic band Essays

Investigate the factors which affects the distance travelled by a tub propelled by an elastic band Essays Investigate the factors which affects the distance travelled by a tub propelled by an elastic band Essay Investigate the factors which affects the distance travelled by a tub propelled by an elastic band Essay Aim: To find out how far a tub can travel by changing factors, which affect it. In this investigation the variables that affects the distances and is changed is mass that is applied on the tub while increasing the mass of the tub.Other variables include:The surface on which the tub is propelled on as some surfaces creates more friction than others. Friction is the force produced when two surfaces rub on each other. Some surfaces produce more friction and so try to prevent the two surfaces from sliding over each. This means that the force stops the tub from travelling far. The greater the friction the shorter the distance is it travels. Smoother surfaces allow the tub to travel further and since the tub is smooth the other surface also needs to be smooth as well in order to do this.The size of the elastic band, as bigger and thicker bands are more elastic than smaller and thinner ones. Because they are more elastic the band can be stretched more so that the elastic band stores more po tential energy and when the tub is released the energy is transferred from elastic band into the tub and the energy changes into kinetic energy as the tub travels forward. Bigger elastic bands can store more potential energy than small ones.The force, which is applied onto the elastic band. A greater force means a greater distance, because there is more potential energy as the energy is transferred from the hand to the band and then to the tub. The further the band is pulled back the more force is used and so the tub would travel further than when a small force is used.In this experiment the factor that is changed is the mass of the tub and the force is kept. Then the force is changed but kept constant while the mass is increased. This is related to the formula ofForce in N= mass in kg x acceleration in m/s2Preliminary work:Before doing the actual experiment we tried out different methods to propel the tub. First we used two stools and put an elastic band on one foot on each stool. The elastic band was put around the edge of the tub so that the tub was inside the band. The band was twisted by rotating the tub and then we it was released. The result was that it flew upwards and then forwards. The more it was twisted the further the tub should have gone however the tub was released from the band. Also this wasnt a good method to measure the distance the tub travelled, as we would need to do more unnecessary measurements. This meant we couldnt use this technique.We adapted the set so that instead flying upwards it would slide along the floor. The other change was to catapult rather than twisting as we could measure the distance it travelled.Equipment ListStool2 fat elastic bandsTubNewton meter10g weightsRulerScaleMethod1. A hole is made in the tub2. An elastic band is cut and then thread through the hole3. A knot in the elastic band on the inside of the tub so it cant fall out.4. A Newton metre is attached to the elastic band, which is attached to the tub. The Ne wton metre measurer the force applied onto the elastic5. Then the empty tub along with the elastic band and the Newton metre is weighed on the scale.6. The weight recorded.7. Another elastic band is cut and then each end is tied to a foot on a stool. The distance between the elastic band and the floor is 40mm.8. The tub is placed on the floor, which is a non-skid floor, which means its not slippery. This shows that there will be more friction between the floor and the tub.9. Then the tub is pulled back using the Newton meter until it reads 15 Newtons. Meanwhile another person sits on the stool to stop it from moving.10. The Newton meter is released with the tub facing upwards and the tub should travel along the floor, making sure that no one stands in front of the experiment or walk across before releasing it for safety reasons. Also the person pulling back the tub and releasing it should be the same person.11. When the tub stops the distance between the back edge and the back feet of the stool is measured using the ruler. The result is recorded.12. This is repeated 3 times to calculate an average and to make sure that the result are reliable. This helps to detect any anomalies.13. Then the weights are put in using the 10g slotted masses starting with 2 10g slotted masses.14. The slotted masses are stuck in using tape and blue tack, which would add more mass15. The tub is weighed and because the masses are placed in the centre of the tub so all the weight will be in the centre.16. This then catapulted always repeating it 3 times17. More weights are added each time using the same process until there are 8 10g masses in the tub18. Then the force is changed to 10 Newtons and increasing the mass each time until there are 8 10g masses.PredictionI predict that the tub will travel further if the elastic band is pulled further applying more force and if there less mass. This is because there is more energy in the elastic band if there is a greater force so that more e nergy is transferred into the tub. More mass means its going to travel a shorter distance because of inertia, which is the principle of more mass means a greater resistance of moving.Obtaining evidenceAnalysing and considering evidenceBoth graphs and tables show that as the mass increases so the distance decreases through the line of best fit.The tables show that if the force is increased the distance increases as well.However the results that the tub will travel further if a greater force is used while the mass is increased. The graph showing the relationship between the mass of the tub and the distance travelled using a 15 N force shows the decrease in distance when mass increases because when the mass is 62g the average distance the tub travels is 3.76m, however when the mass is 1.4g the average distance is 1.75m and the distance decreases even more when the mass is 1.46g and the tub travels 0.91m. The graph also shows a fast decrease because the gradient of the line of best fit is steep. Even though the line is a little bit curved it still shows a steady decrease. As the mass doubles the distance is reduced by a factor of about 3.The graph showing the relationship between the mass of the tub and the distance it travels using 10N also shows the decrease because when the mass is 63g the average distance is 1.39m whereas when the mass of the tub is 146g the tub travels 0.43m. It shows an even faster decrease than the other graph because its steeper. The line is straighter which means the decrease is more even. The graph also shows that when the mass doubles the distance halves. This shows the fact that mass is inversely proportional to the distance. This graph displays this better than the on where the tub used a mass of 15N.The reason for this is because of inertia, which is the effect of resisting acceleration and if an object doesnt accelerate much then it wont travel far. As mass increases so the greater inertia is so the more it resist acceleration and t herefore travelling a shorter distance. This is what happens with the tub. More masses are put in increasing the total mass of the tub and so increasing the inertia, which act on it, allowing the tube not to accelerate as much and so it will resist velocity more.The results show that tub, which had 15N, travelled a longer distance than the one that was pulled with 10N, because when the tub weighed 63g and a force of 15 N was used the distance it travelled was 3.76m, but when a force of 10N was used when the tub weighed 63g the distance was 1.39m. When the mass of the tub was 146g and the force was 15N the distance it travelled was 0.91m however when a 10N force was applied the distance was only 0.43m.This shows that force and distance are proportional, because when the force increases by a one and a fifth the distance doubles.The reason for this is that there is a greater force, which means there is more energy transferred in the tub as kinetic energy from the elastic band. Also the tub has a greater forward for with 15 N than with 10N which means that the opposite force air resistance is going to be less with the tub travelling with a force of 15N than with the tub travelling with 10N. This means that the forces are more unbalanced with the tub travelling with a force of 15N. So the tub will accelerate more and travel a longer distance than the tub with 10NThe conclusion supports the prediction made at the beginning because the results prove that when the mass is increased so distance increases.The reasons for this give a valid explanation as to why this occurs. The conclusion proved that a greater mass means a shorter distance , but a greater force means a greater distance.EvaluationThe results that were obtained were quite reliable as they showed what they were meant to show and so prove the prediction. Even though the results are not exact they are still close which also include anomalies. The graph showing the relationship between the mass of the tub and the distance using a force of 15 N shows a main anomaly, however its not completely irregular which means there was an error however it didnt affect the analysis of the results. The results were able enough to support the conclusion only to an extent because its apparent that there are some irregularities which although supported the basic facts of the conclusion but not the detailed ones, such as if mass and distance were proportional, because it was difficult to find an obvious connection between them.The procedure itself was a good way to show how the distance changes when the mass is varied and the differences between the distances made it clear that there was a decrease. It was a simple procedure with simple equipment, which gave the correct results and achieved what we aimed to do. It was a quick experiment, which meant we had time to do more variations such as putting more slotted masses and changing the force and so do more sets of results.The procedure was safe because ther e werent many hazards involved such being hurt by the tub as it travel along the floor and the equipment was safe to use. It also allowed the tub to travel far especially with the usage of the Newton meter at the back. Also the reason, which could explain the anomalies, could be that the tub had to carry more load apart from the mass itself but also the other elastic band the Newton meter, which was also heavy.Because the Newton meter was attached at the back this caused some problems as the tub would sometimes skid on the Newton meter by lying on top of it as it travels and so it would travel a shorter distance because the Newton meter is making the tub stop at the wrong time so that the reading would be wrong. Repeating it three times though still gave us accurate results as they were all were similar. However a change that could be made would be removing the Newton meter, as then the tub would carry so as many loads, which could create wrong results. Another change would be sprea ding the slotted mass evenly out as we put them in the centre which means all the weight was in the centre instead of being evenly spread along the tub. This would have given better results as position the masses in one place could affect how far the tub travels.Further work to this investigation could include using different sizes of bands and observing which size enables the tub to travel further. Also different surfaces could be used such as carpet or a surface that is very smooth such as ice if that is available, because this will create very little friction and so would be a contrast to a surface such as the one used in this experiment.

Peroxidase Lab Report Essay Example

Peroxidase Lab Report Essay Example Peroxidase Lab Report Paper Peroxidase Lab Report Paper We were able to measure enzymatic activity by the change in absorbency per second with a spectrophotometer. By testing different concentrations of peroxides and its reaction rate in seconds, we were able to see that as the amount of enzyme increased the catalytic reaction also increased. The optimal amount of peroxides concentration to be used in the subsequent experiments was determined to be 1. 0 ml. Any amount above this would have caused the rate of absorbency to be too fast, making it too difficult to get accurate readings. Any amount below this would not have produced a reaction at an appreciable rate. (Dolphin, Fleck, Collect and Wastage, p. 76) In addition, our results show that a rise temperature and pH only increase the rate of reaction to a certain point before the reaction rate begins to decline dramatically. In the case of boiling of the enzyme there was no rate of reaction found whatsoever. A similar result was found when hydroxylation was added to the peroxides and it caused an inhibition reaction. Overall, the results show that the peroxides enzyme is sensitive with reference to the above factors in whether or not a reaction is catcalled. INTRODUCTION Enzymes are essential in the breakdown of certain materials or molecules that cannot be used by or are harmful to an organism as they are, into products that can be used or are not harmful for the organism. They are proteins and their structure consists of amino acids with a specific shape. Enzymes have an area called an active site where substrates (only a particular molecule or material to be converted) bind. When the substrate is bound to the active site on the whole entity becomes an enzyme-substrate complex. The substrates covalent bond is disrupted and this chemical change constructs a new product from the original abstract while leaving the enzyme unaffected. Once this new product is released, the enzyme can bind again with more of these molecules needing conversion. Sometimes the enzyme works with commences or cofactors such as vitamins or metallic ions to help the binding process. In other cases competitive inhibitors are at work and prevent a substrate from being bound to the active site on the enzyme. The competitive inhibitor is similar enough to bind with the enzyme, but because it is not a perfect match, the enzyme then loses its ability to catalyst a reaction for that moment. In accordance with these properties, we ill see how certain factors affect the reaction rate of peroxides. For our purposes in this lab we used the enzyme peroxides extracted from a turnip. Peroxides, along with the help of its iron ion cofactor, catalysts harmful hydrogen peroxide (H2O) into a harmless compound and water. In order to follow the rate of reaction for the breakdown of hydrogen peroxide, we used ecological, a colorless dye, which donates electrons and turns brown when it is oxidized. We used this dye so that we could measure the absorbency with the spectrophotometer as the hydrogen peroxide is being broken down and the lour change gets stronger over specific time intervals. We developed several null hypotheses for these experiments: 1) The amount of enzyme added to the reaction will not affect the rate of reaction. 2) Temperature will not affect the enzymatic activity. 3) pH will not affect enzymatic activity. 4) Similar molecule to substrate will not affect enzymatic activity. MATERIALS AND METHODS Materials and methods are taken from Lab Topic 7 in the Biological Investigations, 9th Edition. RESULTS Graph 1- Effects of Peroxides Amounts Graph 2 Temperature Effects on Peroxides Activity Graph 3 pH Effects on Peroxides Activity Graph 4 Boiled Peroxides Results Graph 5 Hydroxylation Results Graph 6 Optimum Temperature for Reaction Rate of Peroxides Graph 7 Optimum pH for Reaction Rate of Peroxides In Graph 1, Effects of Peroxides Amounts, it shows the difference in rates of reactions with different concentrations of peroxides in the solution Tubes 2 3 at 0. 5 ml, Tubes at 1. 0 ml and Tubes 6 7 at 2. 0 ml, along with corresponding line slopes. Graph 2, Temperature Effects on Peroxides Activity, shows the difference in rates of reaction for 1. Ml peroxides at ICC, Room Temperature ICC, ICC and ICC along with their corresponding line slopes. For Graph 3, pH Effects on Peroxides Activity, it shows the rates of reaction at pH 3, pH 5, pH 7 and pH 9, along with its corresponding line slopes at 1. 0 ml peroxides. Graph 4, Boiled Peroxides Results, shows the rates of reaction for 1. 0 ml between a Normal Extract of peroxides and a Boiled Extract of peroxides, both with their corresponding line slopes. In Graph 5, Hydroxylation Results, it shows rates of reaction for 1. Ml between a Normal Extract of peroxides without hydroxylation and a Hydroxylation-treated Extract of peroxides. Graph 6, Optimum Temperature for Reaction Rate of Peroxides, shows the slope of the line at each temperature. Lastly, Graph 7, Optimum pH for Reaction Rate of Peroxides, shows the slope of the line at each level of PH. DISCUSSION The significance of the observations in testing the enzyme peroxides and its rate of breaking down hydrogen peroxide helped us to make a decision as to whether to accept or reject our hypotheses in the experiment. The amount of peroxides concentration had a direct relationship to how slowly or how quickly a reaction took place. This result allowed us to reject our hypothesis that the mount of enzyme added to the reaction will not affect the rate of reaction. This test was important so that we could ascertain the best amount of concentration to use in the subsequent experiments with the spectrophotometer set at absorbency 470 NM and timed recordings at 20-second intervals for a total of 2 minutes. At 0. 5 ml of peroxides the reaction time was too slow thus no appreciable line or slope was rendered to measure the reaction with any accuracy. Conversely, it was a challenge to get accurate absorbency readings at 2. 0 ml of peroxides because the pace of the reaction appreciated so quickly and hen met equilibrium. At 1. 0 ml of peroxides the reaction time rendered an appreciable line and slope making it easier to record the absorbency every 20 seconds for 2 minutes and ultimately, the best concentration for use in the next experiments. It is known that when heat is applied to molecules, they move faster and collide more as the temperature rises. This is also true for the enzyme peroxides and its substrate until the temperature reaches ICC and then the reaction begins to taper off and it dives down drastically at ICC when the hydrogen bonds holding peroxides structure together begin to break. The results of this test confirm the same by the slope of each line and thereby we are able to reject our hypothesis that temperature has no effect on peroxides rate of reaction. At ICC the slope of the line is 0. 0071, at Room Temperature ? ICC the slope is 0. 0094, at ICC the slope is 0. 091 and at ICC it is 0. 0052. This is easily seen on the derivative Graph 6: Optimum Temperature for Reaction Rate of Peroxides attached. It should be mentioned here that in class it was decided from the table of results on the board for this experiment that ICC was the optimal temperature. In addition, it is difficult to fully see the results from the line graph number 2. As we can see here from the derivative graph, that just numbers without the prop er graphs can be misleading and it is necessary to take further steps in clarifying the observations and results. As for pH effects on peroxides activity, Graph 3, indicates that the amount of acidity or bassinets to a solution changes the three-dimensional structure of the enzyme and thereby changes the ability to bind with the substrate in an effective manner. Here we tested the null hypothesis: pH will not affect enzymatic activity. The results from Graph 3: pH Effects on Peroxides Activity indicate that the more acidic pH 3 level disrupted the enzymes ability to bind with its substrate and its reaction rate did not appreciate noticeably. As the solution became less acid at pH 5, the greatest reaction efficiency resulted. Once the pH was at 7 and beyond the reaction rate for peroxides and its binding ability became poor and the reaction rate declined. Again, it was necessary to do a derivative graph to see the slope results clearly. In Graph 7: Optimum pH for Reaction Rate of Peroxides, the rate of reaction increased drastically from pH 3 with a slope f 0. 00007 to pH 5 with a slope of 0. 0055 and then trails off as the bassinets increases at pH 7 with a slope of 0. 047 and plummets as it reaches pH 9 with a slope of 0. 0022. We can see the optimal pH is 5 in this experiment and we were able to refute our null hypothesis because it was shown that pH does affect peroxides reaction rates. In boiling the peroxides extract, the result was that no reaction activity was found. As mentioned in our book by Dolphin, Fleck, Collect and Wastage, the enzyme is denatured because the high temperature broke a large number of hydroge n bonds, which dramatically changed the structure of the enzyme permanently (82). A denatured enzyme cannot catalyst a reaction and this result appears evident on Graph 4: Boiled Peroxides Results. The comparison between a normal extract of peroxides and a boiled extract of peroxides shows that zero absorbency with no appreciation was yielded over the two minutes for the boiled extract as opposed to the normal extract that did yield an appreciable line with a slope of 0. 0099. Again, we can refute our null hypothesis of temperature will not affect the enzymatic activity. Finally, a null hypothesis that a similar molecule to substrate will not affect enzymatic activity was tested.

Explain the reasons why left realism emerged Essay

Explain the reasons why left realism emerged - Essay Example Therefore, to fill in the radical vacuum that was prevalent in left-realists thoughts regarding crime, the left-realists had to take a position. This was meant to balance the extreme ideas regarding crime, which were being advanced by the right-realists on the one hand, and the left idealists, on the other hand (Young & Matthews, 1992). Upholding the view that crime was a matter of free will and personal choice as opposed to a behavioural problem, the left-realists emerged to criticize the politics of establishing longer sentences and more prison facilities (Matthews &Â  Young, 1986). Rather than addressing crimes through the concentration of criminals in prisons and rehabilitation centres, left realism advocated for the political class to take the causes of crime seriously. Further, the concept of left realism required that victims of crime must be taken even more seriously, considering that the fear of crime is not irrational, and everyone stands the chance of being a victim of crime (Lea, 2002). In this respect, the left-realists sought to criticize the distorted view that was being advanced by the right-realists and the left idealists. While the right realists cited crime as a function of a sick society full of moral decay and crime that is out of control, the left idealists did not take crime seriously, and thought it was simply a form of exaggerated societal panic (Lea & Young, 1984). The major focus of left realism is the victim, who should be the main concern of criminology. The left-realist also advances the view that it is out of the prevalence of unstructured inequality and perceived social injustices, that crime finds a breeding ground to grow and thrive (Matthews &Â  Young, 1986). Thus, left realism regards the establishment of better and equitable policies as a means of addressing the crime problem. The view of left realism is

Retail Marketing - John Lewis Company in the UK Essay

Retail Marketing - John Lewis Company in the UK - Essay Example Newer brands of retailing industries are also becoming more and more dependent on support activities such as online support sections, manufacturing and supply chain. The vulnerabilities posed by various facets of the retailing industry are myriad although currently the retailing industry in under great pressure due to lowered spending levels. Retailing has evolved and emerged over the years as an essential connection between the modern consumer culture and the supply chain mechanisms used to support the retailing in force. The domain of retail commodities spans all kinds of goods such as cosmetics, food products, homemade ups, textiles, draperies and the like. The size of retail outlets however depends on a number of other factors such as the consumer markets around the retail stores and outlets, the historical image of the retail outlet etc. The various retailing businesses around Great Britain have are also structured accordingly with small, medium and large retail outlets. The his tory of retailing in Great Britain has historically deep roots with large chains such as Harrods, John Lewis etc. spanning over decades. The drive to diversify and expand the domain of business activities as well as strong fiscal grounds has ensured that these historical businesses have remained strong in terms of performance. The resilience of these businesses has been evident from their dealing with large crises such as the Second World War or the economic depression of the seventies. 2. Chosen Company: John Lewis Partnership The chosen company John Lewis Partnership has also had deep historical roots as well. The company begun as a simple drapery store on Oxford Street, the historical shopping district in London but it soon emerged as a chain of stores around London. The move to obtain more stores around London went through before the First World War providing John Lewis a comprehensive retailing network. The John Lewis Partnership emerged with the novel idea of providing employe e led partnership. This idea ensured that after the death of the original owner’s son, the John Lewis Partnership was bequeathed to the employees in 1925. This trend has continued in the same spirit ever since and the John Lewis Partnership has been stewarded by a counsel of employees ever since. Over time the John Lewis partnership has diversified its business interests in order to augment its market standing. The John Lewis brand also supports other business interests such as the Waitrose supermarkets as well as the Greenbee range of products and services. In addition to the above, the John Lewis brand also provided support to the Ocando brand but it later absolved itself of any such business interests. It is evident from the facts presented above that John Lewis represents a major retailing business in the context of the United Kingdom. This contention is further strengthened by the argument that John Lewis Partnership is the third largest retailing business present within the boundaries of the United Kingdom. As mentioned before, the John Lewis Partnership is also distinct from other brands in the retailing industry due to its power sharing structure that stretches from the CEO to the person looking after the aisle in the stores around the United Kingdom. All employees of the John Lewis brand are considered partners of the company. The annual profit is also distributed amongst the partners and recent years have seen the distribution of such