Wednesday, October 30, 2019
Case study Essay Example | Topics and Well Written Essays - 1250 words - 13
Case study - Essay Example Even if he was aware of the contract it is still possible that he was not aware of the clause. The fact that management made them aware of the presence of these people and they still went ahead with their holiday could lessen their chances at raising a claim against the hotel or the travel agency. This goes into their complaint about the poor food. It must be established whether or not the poor quality of the food was a function of an unsupported expectation or because it failed to meet conditions set forth in a contract. ‘Quiet atmosphere’ was an essential requisite of the client before he agreed to book with Elite. If it can be shown that Elysium acted in wanton disregard of this fact, a case can be made that they acted in bad faith because they knowingly booked Mr. Williams in the hotel knowing that he would be in the company of the 18-30 club people when he wanted peace and quiet. This goes into their claim that it was impossible for the hotel to accommodate his desire to be away from the noisy young people. If it can be shown that there were vacancies in the hotel and Mr. Williams knew about this, then there is a further showing of bad faith. My client Mr. Williams has a complaint that amounts to a breach of contract on the part of Elysium and Elite Travel. At issue here is that Mr. Williams reserved a two week vacation at Elysium based on the offer made by Elite Travel which promised certain conditions which were not met. Among the conditions breached was the offer of international cuisine and an Olympic size swimming pool. The cuisine was described by Mr. Williams as â€Å"junk food†and the Olympic-size swimming pool was always closed because the 18-30 Club patrons kept rendering it unusable. The attitude of management at Elysium further aggravated Mr. Williams because the resort was unwilling to accommodate his
Monday, October 28, 2019
Sample of Detailed Job Description of Health Care Assistant Essay Example for Free
Sample of Detailed Job Description of Health Care Assistant Essay In the morning the role of the Healthcare Assistant is to assist the Nursing Staff in the delivery of Patients care , under the supervision of Clinical Nurse Manager and Staff Nurse. Before handling the clients Health Care Assistant under Inspection and Prevention Control by Washing or Disinfecting hands must be follow. Health Care Assistant will assist the client during bathing, showering, shaving, dressing and undressing in bed and in the bathroom under the supervision of the Nurse. Privacy and Dignity must be respected and full Independence are implemented in all clients and those not able. Health Care Assistant will help the Nurse to serve clients breakfast and to feed those who are helpless, under the supervision of the Nurse. Privacy and Dignity must taken place and full Independence must be delivered to the clients. Health Care Assistant will follow individual patients dietary needs are adhered including special diets and give supplementary drinks under the direction of the Nursing Staff. Health Care Assistant will assist the Nurse in bed making. Health Care Assistant will collect dirty sheets, duvet covers, bed covers and patients dirty cloths under the guidelines of Linen Management/Disposal put them to their respective laundry bag for porter to be collected. Health Care Assistant will answer bell calls and assist patients who are confined to bed with their toilet needs under the supervision of the Nurse. Health Care Assistant will assist in toileting of patients including the giving, removing and emptying of bedpans, urinals, commodes under the supervision of the Nurse. Health Care Assistant will clean and disinfect bedpans, urinals, commodes, hoist, shower seats and trolleys under the guidelines of Infection control and Prevention. Guidelines of Infection and Prevention control must be follow. Health Care Assistant will tidy bathrooms, sluices and toilets. Mop up spillages on the floors under the guidelines of Waste Management/Disposal. Disposed of soiled linen in water soluble bag securely and seal place it in white canvas bag for transfer to hospital sluicing department. Pack soiled woolens in separate water soluble bags place it in blue plastic bag for laundry. Health Care Assistant will serve dinner to patients at 1 o’clock and feed those are helpless under the supervision of the Nurse. Monitor patients intake to avoid choking. Clean and wash if necessary bed-tables and lockers. Remove rubbish etc. Health Care Assistant will answer call bells and report request to Nursing staff. Health Care Assistant will assist in toileting of patients including the giving, removing and emptying of bedpans, urinals, commodes under the supervision of the Nurse. Always maintain privacy and dignity towards patients. Answer telephone calls and locate appropriate personnel, as required. Health Care Assistant if necessary will assist with the transport of patients in the wards or transfer patients to other departments as required under the supervision of the Line Manager or Nurse in Charge. Health Care Assistant during Admission, transfer or discharge list patients property under the supervision of the nurse in charge. Health Care Assistant will serve tea and feed those who are helpless. Health Care Assistant will assist the patients back to bed under the supervision of the Nurse. Always maintain privacy,dignity and respect to patients. Remember, patients has the right to refuse. Remove uniform and disinfect hands before leaving the ward. 2/2 As a night Healthcare Assistant the role is to assist the night Nurse in the delivery of the the Patients care, under the supervision of the night Superintendent. Collect dishes and wash them. Ensure that kitchen are keep tidy and locked at all times. Answer call bells and report request to nurse on duty. Assist patients those who wants to go to the toilet or offer bedpans and commodes to those who needs before bed. Assist patients back to bed. Always maintain privacy, dignity and respect at all times. Remember patients has the right to refuse. Assist patients and ensure that call bells are working properly at patients reach. Ensure all doors and windows are lock and all Fire exit doors are clear with no obstruction. Monitor patients at all times, ensure that patients are in safe and in comfortable way. Emptying and disinfects commodes, urinal bottles and bedpans after use. Be alert at all times. Ensure safety and security of all the patients at night. Answer call bells and report request to nurse on duty. Incontinence patients are more likely to be wet at night.Ensure they are dry at all times. Change pad and linen if necessary under the supervision of the night Nurse on duty. Always maintain privacy, dignity and respect towards patients.
Saturday, October 26, 2019
Elizabeth Barrett-Browning and W.B. Yeats :: Biography Biographies Essays
Elizabeth Barrett-Browning and W.B. Yeats  Elizabeth Barrett-Browning and W.B. Yeats, examined together in the same sitting are as different as the Victorian and Post-Modernist eras they emerged from, yet they were both independent thinkers of their time.        Browning, born in 1806 before Victorianism came into full play, was celebrated as a woman poet but also quite conformist to the Victorian movement in some regards. Browning did make use of her family's money to "give herself an exceptional education" (1858) and she thought outside of traditional lines in regards to gender roles for women as in her poem "Aurora Leigh". In this poem, the narrator is a woman which is unusual for that era "Place your fecund heart in mine, and let us blossom for the world" (1877). It was unusual in the Victorian era - to consider that women added anything substantial to a marriage relationship. Browning was definitely independent in her thinking and in her personal life - defying her father by eloping with Robert Browning late in life (1859).       There are other elements of her poetry that are fairly conformist to the Victorian age. Her poem "Sonnets from the Portugese" describes a courtship that is prudent and in keeping with Victorian age. This form of a sonnet was taken from Shakespeare's style, yet another element of Browning stepping into territory formerly only occupied by men (1859).       W.B. Yeats, influenced in large part by his free-thinking father, became just that (2322).  Yeats poetry contains elements of the mysticism that he studied, whether the double worded meaning of "The Second Coming" or the reference to Spiritus Mundi in that poem, Yeats defied the religious conformist thinking prevalent at the end of the Victorian era.. In his poem, "Sailing to Byzantium", Yeats takes on the narrative voice of an old man, sailing away from his "homeland" to Byzantium, where old men stand in "God's holy fire" (2332). This reference to Byzantium, a city of the Roman empire, would not have been considered "holy" by traditional religious thinking.       Yeats borrows from Greek mythology in "Leda and the Swan" and puts words to a sexually explicit tale of a swan raping a girl (2337).
Thursday, October 24, 2019
Crime Prevention Essay -- essays research papers
â€Å"Kids Being Charged with Felonies†     A felony is a crime in which the convicted may receive more than a year in prison for their actions. The paper that you are about to read is going to explore some of the issues about kids being charged with felonies. We will also examine some of the issues of how this is portrayed in our news media today. Furthermore, I will offer my opinion, on how kids being charged with felonies could be a positive step in the right direction.      It is real that in America today we have asked our kids to grow up at an alarming rate. There has been no other time in history that children are asked to be mature enough to handle adult situations with regularity. Many of the past generations just did what their parents told them to do. Mow the lawn, clean their bedroom, and maybe some household chores and so on. In today’s society we’re asking our youth to watch their younger siblings. We also ask them to use potentially dangerous technology at a mature level. Keep in mind that some adults can’t even use technology responsibly! Since we want them to grow up quickly we have to expect that they are going to make adult mistakes especially with the actual maturity level. Is it safe to say that some kids do something that wasn’t meant to be so harmful, and as it would turn out be so detrimental to their lives? When they do make a mistake should we give them adult punishments?      I start in Atlanta, Georgia where two girls baked a cake with glue in the batter and fed it to their fellow classmates. The two thirteen yr. old girls could be charged with up to twelve counts of assault. (CNN 11-19-04) It is situations like this were two girls could be in jail for a long time just because they were trying to pull off a prank.      In Santee, California Charles Andre Williams, a student that was made fun of on a frequent basis brings a gun to school and gets off thirty rounds. The result was a death of another student. Williams had told several people the weekend before including an adult that he was planning to kill someone at school, but no one took him seriously. (CNN 3-8-2001) Again we ask students to make mature decisions, but it isn’t what we had in mind. The number of stories goes on and on including the King brothers who killed... ... juveniles. Hopefully someday we will come up with a positive solution that works. Until that day we can only hope that the fast maturing children of the world will mature enough to understand that nobody can just do whatever they want. There will always be consequences.                     Reference      Legon, Jeordan â€Å"Student hacks school, erases class files†          CNN-6/11/2003      â€Å"Girls charged over sickening cake†          CNN-11/19/2004      â€Å"An epidemic of violence†          CNN-3/8/2001      â€Å"King Brothers get reduced jail sentences†          CNN-11/14/2002           â€Å"School Shooting suspect to face attempted murder charge†          CNN-3/23/2001
Wednesday, October 23, 2019
Google Generates Revenue Essay
Explain how Google generates revenue and identify future levels of revenue given some of the risk factors are for future revenue generation. Google generates the bulk of its revenue from its advertisers and a relatively small portion from enterprise search products like Google Mini. Google uses the pay per click cost basis which is an advertising model used to direct traffic to websites. The advertisers pay Google when the ad is clicked and according to analyst about 25% of searches results in an ad click. Google future levels of revenue include Google Audio Ads which are ads placed in radio programs. Google print ads which as the names suggest are ads placed by Google in printed material like magazines and newspapers. Google TV ads follow the same idea by putting ads in television commercials. Google Video Ads is a revolutionary concept where Google get paid when users click to play video ads. These stream of income come in stark comparison to the risk factors when because all of the risks are geared to stop ads. Ad blocking technology would affect Goggles result especially since this technology has existed for quite some time. Another factor that Google should seriously consider is the Index spammers harming the integrity of the search results. Spam is a nuisance and just like with email Google will have to develop some type of spam blocker to keep from alienating their customer base. Discuss the extent to which SOA will reduce reliance on a single provider of enterprise software and increase flexibility in deploying new applications and functionality. SOA will reduce reliance on a single provider and increase flexibility by leveling the playing field of sorts. The concept is to automate the business process that run across different IT systems. Usually different companies will set up their IT functions completely different from one another. This is understandable because every business has different technological needs. SOA has the ability to automate business processes that run across different IT systems and provide the option of tying them together. This would make working with a project that spans several businesses across the country not only feasible but affordable. This will increase flexibility and functionality when deploying new applications because the system will be able to instantly talk to each other even if they handle a different aspect of the business. Ideally this would be a seamless transition causing a more cost effect use of time and resources.
Tuesday, October 22, 2019
A Wel-rounded Perspective of Jonathan Kozols Savage Inequalities
A Wel-rounded Perspective of Jonathan Kozols Savage Inequalities This article, "Savage Inequalities", by Jonathan Kozol presents an extremely controversial issue. Educational Inequality is a familiar topic in most sociologists' and ordinary citizens' thoughts and conversations. Some people, most likely those who are subject to the effects of the inequality, are activists who are trying to boost equality for children in our educational system. Many others, however, are not directly affected by the social inequalities that so pervade out society. These people, subsequently, cannot grasp the idea that thousands of children are deprived of most, if not all, of the things that we take for granted. Jonathan Kozol traveled around the country and visited and observed schools in poor, middle-class, and rich communities. He found that many schools that don't receive substantial funding from their tax district lacked many of the essential tools and resources that most sufficiently funded schools thrive on, therefore putting many children at an enormous disad vantage.sourdough rye with walnutsKozol's article is about two very different school systems in seemingly opposite worlds, although both in the United States. First, he observed the Martin Luther King Junior High School and The Jefferson School in East St. Louis. This small, decrepit city is overwhelmed with sewage overflows that have crept into the schools shutting them down from time to time. The majority of teachers and maintenance crews have been laid off here due to a lack in funding because the city is so poor and taxes do not produce enough money to maintain the schools. Many students here are well aware of their inferior position to students living in better areas that can afford to provide a good education. Those who have class-consciousness, however, feel powerless in making changes and accept their realities. Young women become pregnant because they know that there is not much else in store for...
Monday, October 21, 2019
Oppression of Women essays
Oppression of Women essays Oppression of women in the 1800s was commonplace. Women were not given the right to freedom nor to express individual thoughts and views. Women were seen as property rather than human beings. In Kate Chopins The Story of an Hour, she demonstrates through Louise Mallard the struggles she must overcome from a loveless marriage and an unfulfilled life. Louise experiences longing from barriers that her husband, marriage and society have placed on her need for individualism, escape from guilt and pleasure for life. Individualism gives people an identity, a sense of who one is. It gives one choices and allows one to be unique. Louise longs for her own individualism and to make her own choices. After hearing the news of her husbands death, Louise feels released from the ties that bind, to pursue her own free will when the story states there would be no one to live for her during these coming years; she would live for herself. There would be no powerful will bending hers in a blind persistence with which men and women believe they have a right to impose a private will upon a fellow creature. Louise believes regardless of ones intentions, whether cruel or kind, is a crime none the less. Louises lack of identity is personified with the lack of use of her first name. We are introduced to Louise as Mrs. Mallard at the beginning of the story, it is not until the end of the story that we discover her first name. Society, marriage and her husband have striped Louise of the main element that makes people individuals. Without a name of our own, who are we? With Brently Mallards passing, Louise can now embrace her longing for individualism and declare it for herself. Guilt is often a difficult emotion for people to overcome. Loiuse is afflicted with the guilt of relishing in the news of her husbands death, but only for a moment. After hearing the news of her husbands death Louise retreats to ...
Sunday, October 20, 2019
Idea and Ideal
Idea and Ideal Idea and Ideal Idea and Ideal By Maeve Maddox It may be a regionalism, but many speakers say or write ideal when they mean idea. For example: I have an ideal for next year’s Christmas: Move the date. Comic Silverman has an ideal for ending world hunger: Sell the Vatican. Do you have any ideals for how I can ease my fear of flying? The noun idea can be used with philosophical connotations, but as the word is used in ordinary conversation, it usually means â€Å"the picture or notion of something formed in the mind.†Here are some correct uses of idea: I have an idea for next year’s Christmas: Move the date. Comic Silverman has an idea for ending world hunger: Sell the Vatican. Do you have any ideas for how I can ease my fear of flying? I have an idea; let’s go to the movies. An inventor begins with an idea of the thing to be made. He wants to visit Paris, but the idea of flying makes him hesitate. As a noun, ideal means â€Å"a person or thing regarded as a perfect example or representative†: James Garner was the ideal of a Hollywood leading man with thick black hair, square jaw, perfect teeth, and a charming smile. The Grace Project: Transforming Our Ideal of Female Beauty The noun ideal is also an antonym of real used as an abstract noun: In politics as in personal matters, individuals must come to terms with the disparity between the ideal and the real. The notion of an ideal, of something, which for whatever reason, ought to be, as distinguished from what is. –J. Grote Ideal used as an adjective does not attract the misuse that haunts ideal as a noun. In the following examples ideal means, â€Å"regarded as perfect or supremely excellent in its kind†: Bond girl Bà ©rà ©nice Marlohe talks about her ideal man What’s the ideal breed for a family dog? In an ideal world, prime ministers would indeed put great thought and effort into establishing a highly skilled, intellectually impressive, thoughtful and engaged Senate. But it’s not an ideal world. Ideal can also mean â€Å"existing only in idea; not real, actual, or practical†: Administrators must compromise between practical and ideal solutions. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Vocabulary category, check our popular posts, or choose a related post below:English Grammar 101: All You Need to KnowPrecedent vs. PrecedenceKn- Words in English
Saturday, October 19, 2019
International Management of Knowledge and Technology Essay
International Management of Knowledge and Technology - Essay Example Hitachi has also embedded its research laboratory with the Cambridge University. These collaborations have taken the state of modern microelectronic technology to a more advanced level (J. G. Thursby and M. C. Thursby, 2002). The operations of multinational companies require a varied skill set. If the company human resource base does not contain all these specific skills, it might search for the skill in external sources. A single university is not likely to possess the complete skill set that a company might require (Ponomariov, 2007). In such cases, cross-institutional research would be needed to satisfy the firm’s needs within a particular area. Hence, companies look forward to other sources of innovation and have termed this act as ‘open innovation’ (Perkman and Walsh, 2007). University students can gain practical knowledge by taking part in the research activities or simply by updating themselves with the processes of innovation that is taking place through t he collaboration of their own university or a joint venture of many universities. They can benefit from this knowledge and be further encouraged to become innovative in their personal and professional lives. These research opportunities are also beneficial for students during their educational phase; they would be able to make various educational experiments to enhance their knowledge and improve their capacity (Lillywhite, Hawkes and Libbin, 2005). Recent research studies highlight that a significantly large number of academic institutions engage themselves with the corporate organizations through different channels simultaneously. This is visible most often in particularly R&D activities in applied... From this essay it is clear that university students can gain practical knowledge by taking part in the research activities or simply by updating themselves with the processes of innovation that is taking place through the collaboration of their own university or a joint venture of many universities. They can benefit from this knowledge and be further encouraged to become innovative in their personal and professional lives. These research opportunities are also beneficial for students during their educational phase; they would be able to make various educational experiments to enhance their knowledge and improve their capacity.This paper discusses that a significantly large number of academic institutions engage themselves with the corporate organizations through different channels simultaneously. This is visible most often in particularly R&D activities in applied sciences. Companies interact more with universities to gain their support in these research activities. The age and e xperience of academicians and their professorial status indulge companies to enter into contracts with them. Various university patents and copyrights also increase the propensity of organizations to increase their interaction with the industry. Lower-ranked departments in various universities set up greater levels of interaction with the university than the high rankings departments. There are various kinds of benefits that might be generated from the collaborative efforts between the universities and the industries.
Friday, October 18, 2019
Literature. A Mexican American girl Essay Example | Topics and Well Written Essays - 500 words
Literature. A Mexican American girl - Essay Example He was an example of an unreliable narrator, due to the many facets of his character. Montresor seemed to be lacking in friendships, sensitive, but devious and vindictive and most probably slightly paranoid. He perceived himself to be above or at any rate, alienated from the 'common herd', and believed he was a connoisseur of good wines. This last, he used as a trick to achieve vengeance on a supposed enemy. He appeared to be a complete loner through choice, and looked down on the rich who had not the old family heritage he possessed. He could be described equally as a sad, pitiful individual or a dangerous mad man. Esperanza would put a Want Ad. in the paper for a used portable typewriter. She knew she had talent; her aunt Lupe told her to keep writing. She valued education, working to pay for it, and admired Alicia for studying. A typewriter would be a good start for her dreams to be made real. He would put an obsequious obituary in the paper, as this would give him an opportunity to gloat over his success at achieving redress, while removing suspicion from himself. It would also allow him to appear to be mourning publicly and reinforce the faade of his and Fortunato's alleged friendship. He would use this as a way to state his superiority over others in his society. Her tone and style would be serious
Discussion Form Assignment Example | Topics and Well Written Essays - 750 words
Discussion Form - Assignment Example The article brought in pricing concerns that would allegedly be affected by the merger, specifically with other Modelo brands. Finally, the third article indicated that compliance with settlement provisions to the merger deal conforms to the merger regulations posed by the DOJ. The merger was originally perceived to bring the respective market shares of each of the organization’s respective brands to a staggering 46% of the U.S. market. As such, it was identified that the merger would benefit the firms involved through dominance and entrenched leadership in the U.S. beer market; as well as the ability to control market prices. A maverick firm is described to exhibit a pivotal role in a merger transaction through its potentials for influencing pricing strategies. As such, Modelo was identified as a maverick firm in terms of its ability to significantly affect the prices of competitors in the beer market through a previous joint venture that the manufacturing organization had forged with. The primary concerns of the DOJ is that if the merger application, in its original conditions would be approved, there would be perceived increases in the market prices of beer due to the elimination of Modelo as a previously independent competitor. The market definition of the merger is a merger for beers in the U.S. market. Since the merging organizations were noted to assume number 1 and number 3 positions, respectively, the merger would definitely consolidate their respective market shares and would dominate the beer industry. Their consolidation was perceived to violate anti-trust regulations in terms of jeopardizing competition in an equitably fair playing field. Their union could be perceived to tantamount to the creation of a monopoly through the apparently large market share that these two organizations would create after the merger. One strongly believes that there are
Thursday, October 17, 2019
John Morgan and Pharmacy Essay Example | Topics and Well Written Essays - 250 words
John Morgan and Pharmacy - Essay Example John Morgan is considered to be the first teacher and practitioner of pharmacy. He was taught pharmacy, chemistry of pharmaceutical and material medica to students, who were studying medical. He is well known because he had laid down the foundations for separating pharmacy from medicine (Cowen & Helfand, 102). The main objective of this separation was to divide the medical field in to different branches in order to enhance and improve the entire profession. Consequently, pharmacy would be cultivated as a separate branch so that it can have a positive impact on medicine. Another reason for this separation was that pharmacy can be improved so that it could be practiced with precision and proficiency. This separation was essential for the benefit of the public (Crellin, & Scott, 200). John Morgan has made a significant and noteworthy impact on modern pharmacy. He has established the foundations of pharmacy and it has now developed as a separate discipline. After the establishment of pharmacy as a separate discipline, doors for professional pharmacy have opened. John Morgan is considered to be one of the most prominent figures in medical history because he had separated medicine from pharmacy. This separation assisted professional pharmacy to growth and develop as a separate discipline.
Church and State Essay Example | Topics and Well Written Essays - 1250 words
Church and State - Essay Example One of the most imperative objectives behind exploring the topic above-mentioned includes seeking the answer to the question whether or not there appears any need for the formulating of the new phase of relations between the church and state in the best interests of the masses at large. Hence, the present paper will provide an insightful outlook of the topic under-examination by seeking support from the works created by the scholars. The fast and continuous alterations being witnessed in the contemporary era all over the world have forced the thinkers and political and social scientists to re-determine and review the role of church or institution of religion in order to avoid and escape the extremism that appears to be challenging the peace and harmony of the social establishments on the one side, and adding their share in widening the gulf of hatred and conflict among the cultures following the divergent religious belief systems within their respective political jurisdictions on the other during the contemporary era. Consequently, the world looks reflecting the scenario of chaos and disorder even after the advent of marvelous scientific and technological advancements making the life peaceful, comfortable and luxurious one in general. There was a time when the entire Europe used to be submitting to the decrees issued by the church. The establishment of the Holy Roman Empire was also the outcome of the dominance i nfluence of church on state and all its institutions. While elaborating the position of church and state in his remarkable â€Å"The Prince†, distinguished Italian philosopher Machiavelli strongly demands the separation of church from the political affairs of government and state (2010, p.45). It is partly due to the very reality that the ecclesiastical principalities or religious rules are unable to cope with the historical patterns altogether. Since the church lays stress upon specific mode of worship as well as leading the life in a standardized manner, the same could not be observed practically in any region of the entire globe. One of the most dominant reasons behind the same is this that the people belonging to divergent faiths, factions and sects co-exist in one and the same socio-political establishment; and if the (Catholic) church representing just one faction of one single faith looks for the masses’ strict observing of the Catholic code of laws, there will be bright probabilities of conflict and clashes in society, leading to anarchical state of affairs in the country subsequently. Rousseau refutes the implementation of religious and social laws by stating that man was born free, but everywhere he is in chains (2008, p.15). Hence, he does not appear to be surrendering before the heavy burdens of laws, which challenge the human liberty in one way or the other. Taking the precedent of the contemporary era rigid orthodox states of Afghanistan and Pakistan, it becomes evident that the nefarious extremist deoband sect of Muslims has made the life of the non-Muslim and peaceful Shiite Muslims miserable and pathetic one by inflicting pains and sufferings upon them with the aim of forcing them to adopt their religious policies and ways at any cost. Such a condemnable religious prejudice has destroyed the efficiency of the political institution on the one side, and has caused the ruination of social fabrics on the other. It is therefore, Machi avelli’s arguments (2010, pp. 47-8) with regards to separation of church and state still carry weight even nearly five centuries after its first publication in 1532. In addition to this, the undue and unnecessary
Wednesday, October 16, 2019
John Morgan and Pharmacy Essay Example | Topics and Well Written Essays - 250 words
John Morgan and Pharmacy - Essay Example John Morgan is considered to be the first teacher and practitioner of pharmacy. He was taught pharmacy, chemistry of pharmaceutical and material medica to students, who were studying medical. He is well known because he had laid down the foundations for separating pharmacy from medicine (Cowen & Helfand, 102). The main objective of this separation was to divide the medical field in to different branches in order to enhance and improve the entire profession. Consequently, pharmacy would be cultivated as a separate branch so that it can have a positive impact on medicine. Another reason for this separation was that pharmacy can be improved so that it could be practiced with precision and proficiency. This separation was essential for the benefit of the public (Crellin, & Scott, 200). John Morgan has made a significant and noteworthy impact on modern pharmacy. He has established the foundations of pharmacy and it has now developed as a separate discipline. After the establishment of pharmacy as a separate discipline, doors for professional pharmacy have opened. John Morgan is considered to be one of the most prominent figures in medical history because he had separated medicine from pharmacy. This separation assisted professional pharmacy to growth and develop as a separate discipline.
Tuesday, October 15, 2019
Divorce Problem Question Essay Example | Topics and Well Written Essays - 1500 words
Divorce Problem Question - Essay Example 105). Also, individualism, increased work pressures, and career aspirations have been cited as contributing factors to increasing rates of divorce. Numerous studies have shown that divorce can be very stressful and difficult as it not only affects the status of marriage but also have far-reaching implications on children and finances. Constitutions and legislations have made provisions for dissolution of marriage if there are sufficient grounds for that. In the United Kingdom (UK), the law on family, marriage, and divorce is covered under the Family Law Act 1996 (The National Archives). Based on this legislation and cases relevant to divorce, this essay will address a divorce problem facing Alsa in a bid to advise her on whether she would be successful in obtaining a divorce. Facts Bob and Alsa have been married for 10 years but have both been unhappy for the past four years. Bob works full time as an engineer and Alsa is a full time housewife. Alsa is becoming tired with Bob’ s lack of assistance in the house; he constantly begins projects and does not finish them. His last project was to fit a new bathroom suite but after removing the old suite, he did not find time to fit the new one. Alsa feels that she cannot cope with his unfinished projects any longer and has moved into the spare room. Although Bob and Alsa continue to eat meals together, they rarely communicate but Alsa has continued to do all of Bob’s washing. More recently Alsa has started to engage in an extra-marital relationship with Ted. Issue Whether Alsa would be successful in obtaining a divorce? Rules Under Family Law Act 1996, divorce and separation is provided for. There is one ground to initiate divorce proceedings: irretrievable breakdown of marriage. The law has provided for five grounds for divorce which the court can rely upon as evidence that the marriage has irretrievably broken down and thus should grant divorce. The five grounds are: desertion; five years’ separa tion without consent; unreasonable behaviour; adultery; and two years’ separation with consent. In addition, the law has set threshold that has to be met before a husband or wife file for divorce: meet specific rules regarding how long one has lived in the country; prove that the marriage has irretrievably broken down; have a marriage that is recognised, legally, in the UK; and have been married for a minimum of one year. Analysis Considering the increasing rates of divorce and how they occur after a very short duration after marriage, Bob and Alsa can be considered to be have sustained their marriage for a relatively longer period (10years). However, both of them have been unhappy in the marriage for the past four years; an indication that the marriage has been experiencing some problems within that period. From the facts gathered, it seems Bob and Alsa marriage does not experience â€Å"serious†problems compared to other marriages whose partners are seeking divorce. Alsa’s main concern is that Bob does not provide assistance in the house as he constantly begins projects and does not finish them. Comparatively, this issue can be considered â€Å"lesser†in marriage and that which can be solved using other avenues rather than the legal avenue. Since this issue does not touch entirely on the fundamentals of marriage, services of a counsellor, church priest, or a family friend can be sought to resolve it (Probert, 2007, p. 65). Besides,
Checks and Balances Essay Example for Free
Checks and Balances Essay This essay will discuss the Constitutional principle of Checks and Balances. It will explain the concept and effectiveness of the separation of power. As an example, the case of Brown v. The Board of Education will be used to explain the concept and effectiveness of the separation of power. Brown v. The Board of Education is a famous case that ended segregation in schools in 1954 during the Civil Rights Movement. First, lets start with what the definition of Checks and Balances is as it pertains to the Constitution. The definition according to Merriam-Webster is: â€Å"a system that allows each branch of a government to amend or veto acts of another branch so as to prevent any one branch from exerting too much power. †. The legislative power is vested in the Congress, the executive power rests with the President and the judicial power is granted to the Supreme Court and other federal courts. Each branch of government has separate and particular powers as listed in the Constitution, each branch is also given the power, duty and ability to control and balance the other(s) in a system of checks and balances. The Constitution grants all legislative power to the Congress. The Congress is bicameral and a bill has to pass both houses: the House of Representatives and the Senate. In this way the houses check and balance each other. Both the executive and the judicial branch check and balance the Congress legislative power. Although only the Congress can make laws, the President has the power to veto bills, in which case the bill can only pass with a 2/3 majority in both houses. Finally, if the Congress and the President agree on a law, the Supreme Court has the power of interpreting the laws and a power of review, i. . the Supreme Court can declare a law unconstitutional and therefore void. As chief administrator the President is required to see that laws are carried out, to enforce existing politics and to managing the bureaucracy. The president nominates the heads of the executive branchs departments, but these appointments are subject to the Congress approval. The constitution makes the president and Congress share powers in matters such as foreign policy and the US armed forces. In the case of Brown v. The Board of Education, the legal defense of Oliver L. Brown stated, â€Å"the discriminatory nature of racial segregation violates the 14th amendment to the U. S. Constitution, which guarantees all citizens equal protection of the laws,. Because of this Brown v. The Board of Education laid the foundation for shaping future national and international policies regarding human rights. At the time, the state of Kansas had segregated schools, meaning that black and white children could not go to school at the same place. At the end of the case, Brown and his legal defense had argued that it was not fair to the children because they may or may not get the best education if they were segregated. The United States Supreme Court ruled that no state should segregate any child in public schools. White and Black children would go to school together and be offered the same rights. Anything less would be unconstitutional. This is a perfect example of how the state legislature was overturned by the Supreme Court and they were able to keep a check and balance on each other. The state of Kansas did not have a law stating that the schools must be segregated, but they also did not have a law saying that they couldn’t be segregated. The Browns first took their case to the state in 1951. After the case was dismissed, Brown and four other lawsuits made an appeal to the United States Supreme Court were the state ruling was overruled. The Supreme Court had checked and agreed that it was a violation of the Constitution to segregate schools. To this day, a public school can not discriminate against any child, black or white, male or female, smart or special ed. The decision made by the Supreme Court was a unanimous ruling that was issued on May 17, 1954. At that time Chief Justice Earl Warren wrote that segregated schools are not equal and cannot be made equal, and hence they are deprived of the equal protection of the laws. He continued, We conclude that in the field of public education the doctrine of separate but equal has no place. †. Thank goodness for checks and balances, without them, the country would be a much different place to live.
Monday, October 14, 2019
The Electrostatic Energy Harvesting Engineering Essay
The Electrostatic Energy Harvesting Engineering Essay this paper presents a general idea of the electrostatic energy harvesting devices. Their working principle, harvesting method and basic designs will be expounded. And another two new approaches, 2D energy harvester and non-resonant energy harvester with rolling mass will be shown. The 2D energy harvester can harvest energy in arbitrary directions in a plane. And non-resonant energy harvester with rolling mass shows its low frequency capability. It can harvest 0.5 Â µW at 10Hz. Further improvement of this design may applied to energy harvesting from human body motion. Introduction Generally, batteries are the most reliable power source for electronic devices. It is powerful, easy to use. However, it can only provide constant power for a limited period. After that, the batteries have to be changed. Therefore, for those devices that have large amount of number or in inaccessible position. Batteries are not suitable for them. Energy harvesting devices are one of the attractive options of these applications. Energy harvesters can harvest energy from different ambient sources such as solar, thermal and vibration. In these cases, solar is not a reliable source, temperature gradients are modest, vibration seems the more abundant, stable and predictable choices. Currently, three major methods apply to vibration energy harvesting, electromagnetic, electrostatic and piezoelectric mechanisms. Each technique has its own advantages. Lot of articles did research and provided good conclusion on them. [1-3] Electrostatic energy harvesting device has the lowest energy harvesting capabilities in these three mechanisms, but it has the most specific advantages. It facilitates CMOS integration [4]. That means it can realize self-power integrated circuits as an on-chip power source. It also environment protects. Unlike piezoelectric and electromagnetic counterparts that require exotic materials. Electrostatic devices are mainly made of silicon.[5] This paper will focus on the current electrostatic harvesting research. Its working principle and harvesting processes will be discussed in the first part. Some new approaches will also be presented. electrostatic harvesting Operating Principle The electrostatic harvesters harness the work done against the electrostatic force of a variable capacitor. In other words, the vibrations cause the gap distance or overlap area of a parallel plate capacitor to vary under constant charge or voltage condition. This causes the capacitance change of parallel plate capacitor and produces electrical energy. The fundamental definition is given by the formula below. C=Q/V (1) Where C is capacitance of variable capacitor in farads, Q is the charge on the plate in coulombs and V is the voltage on the plates in volts C=ÃŽ µ (A/d) (2) Where A is the overlap area of the plates in and d is the distance between the plates in m. This equation shows the capacitance is proportional to A and inverse proportional to d. (3) E is the work done in joules. If the charge Q is held constant, then V will vary as C changes because of their inverse proportional relationship. Then from, the relation between voltage and capacitor energy is squared rather than linear. As a result, the work done will increase as the C decrease. That provides the harvested energy. Similar thing happens when the voltage V is held constant and Q varies. [1] They are known as the voltage-constrained method and charge-constrained method. [6] In the recent applications, the charge-constrained method is more popular over the voltage-constrained method as the voltage-constrained method requires an extra charge reservoir to keep the voltage in a constant value, while the charge-constrained method only requires one. [4] For charge constrained system, as shown in Figure 1 the energy conversion cycle starts as the variable capacitance reaches it maximum Cmax. The charging process is represented by the path from point A to Point B in figure 1. At point B, the energy stored can be shown as, (4) From point B to point C, an external charge reservoir is connected in order to keep the charge constant. The capacitance is starting decreasing as the overlap area A decreases or the distance between the plates d increases. The voltage is inverse proportional to the capacitance which is why the voltage increases in this period. This period is the actual mechanical to electrical conversion period. The energy stored at point C is now, (5) The path from point C to point A is the discharging of the charge on the variable capacitor back into the charge reservoir The whole process forms a proper energy conversion cycle. And the amount of energy gain is, (6) Usually there is a parallel capacitor is connected parallel with the variable capacitor in order to limit the maximum voltage that might damage the system during the harvesting. Then the energy equation is becoming, (7) Figure 1. Charge-constrained energy conversion cycle. B. Steps of energy harvesting The vibration cycle in an electrostatic energy harvester has three steps, pre-charge, harvest and reset. Figure 2. Figure 2. vibration cycle of electrostatic harvester. In the system, the variable capacitor is pre-charged to the battery voltage, and then the capacitor is connected to the battery. The circuit has no current flow at first since the capacitor and battery have same voltage level. But with the separation of the capacitor plates or the decreases of overlap area, the voltage increases with the decrease of capacitance. Charge therefore flows into the batteries and energy is harvested. When the capacitance reaches minimum value, the energy left in the capacitor will be driven back to the batteries and ready for the next cycle. C. Basic Designs These three mechanisms in the figure 3 are the three basic design structures of the electrostatic harvesters, in-plane overlap converter, in-plane gap-closing converter and out-of-plane gap-closing converter. The in-plane overlap converter varies its capacitance by changing the overlap area between comb fingers; the in-plane gap-closing converter varies its capacitance by change the displacement between comb fingers and the out-of-plane gap closing converter varies its capacitance by change the gap between the centre proof mass and two electrode plates. The most of the current designs of electrostatic harvesters are based on these three basic designs. Figure 3. (a) in-plane overlap converter. (b) in-plane gap-closing converter. (c) out-of-plane gap closing converter. D. Comparison in these three designs Ye Mei Lim[8] did a study on the output energy for these three designs. Firstly the in-plane overlap and in-plane gap closing converters were compared. The Cmax for the one set of comb fingers were 0.122pF and the Cmin can be treat as zero since the application of silicon nitride dielectric coating which is a very thin layer of chemical (up to 0.1Â µm) that can electrically isolate the electrodes even the plates contacts with each other[4]. While using the same set of comb fingers, the Cmax were 0.149nF and Cmin were 0.122pF. By applying equation (7), the in-plane overlap converter harvests 1000 times less than in-plane gap closing converter. Then with the simulation of both in-plane gap closing converter and out-of-plane gap closing converter. The results were found out that the in-plane gap closing mechanism is approximately 1.8 times that of the out-of-plane gap closing mechanism for load volumes between 5 and 50. NEW APPRAOCHES A. 2D Electrostatic Harvester Most of the past electrostatic harvesters are only one degree of freedom. They can only harvest energy via one direction of motion. Y. Zhu fabricates a 2 degree of freedom electrostatic transducer for energy harvesting with resonance frequencies of 38520 Hz and 38725 Hz. It can scavenge energy in arbitrary directions in a plane with two resonance frequency peaks. Also an ultrasound-based method for powering the device is presented. Y. Zhus design includes a 2 degree of freedom motion mechanism. The seismic mass is coupled with both frames as shown in figure 3 with elastic flexures. This design makes the device be able to detect both movements in X and Y frames and also decouples the X and Y movements of the mass. Figure 4. Two degree of freedom motion mechanism to harvest any direction in-plane vibration energy Figure 5 shows the SEM image of the 2-DOF electrostatic transducer. And table I are the key parameters of this design. The width difference of X frame and Y frame gives the transducer two different resonance frequencies. The primary resonance frequency at 39238 Hz and second at 39266 Hz. That gives a 302 Hz of -10dB bandwidth. It is twice of the 1D resonator. This device can obtain 10mV through a 1M ohm resistive load and harvest 0.1 nW power. Since this transducer can be power by an ultrasonic generator of frequency close to its resonance frequency. Since the ultrasonic is relatively safer than other power sources. This design may be useful for functions in medical environment. Figure 5. SEM image of the 2-DOF electrostatic transducer. Table 1. key parameter of the 2-DOF energy harvester B. Non-Resonant electrostatic harvester with rolling mass M.E.Kiziroglous design [10-11] focuses on maximizing the proof mass. In this design, an external free rolling proof mass is introduced. The mechanical energy is proportional to the proof mass, bigger mass generates more energy. This design is a non-resonant device. This property gives it wider applications. Figure 6. (a) Device structure. (b) Equivalent circuit of the device The Device structure is shown in figure 6(a). Figure (b) is the equivalent circuit of the device. The stainless steel rod acts as the contact switches and comb finger. When the steel rod is aligned with one of the strip electrodes, it connects with a Cu input Contacts to pre-charge the rod. That generates an electrostatic force between the rod and the strip electrode. That pulls the rod away from the strip electrode and reduces the capacitance at constant charge. The rod then disconnects with the input contact and makes the contact with a discharge electrode. The energy will be transferred as a high voltage pulse. The test of the current prototype of this device reveals a capacitance ratio of 4 and demonstrates a voltage gain of 2.4. Later Kiziroglou provides an advanced design of that [12]. This time the glass substrate is form in a cylindrical shape. Figure 7 is fabrication and optical images of the device. The first prototype is characterised with plate size 1 x 10 mm and SiO2 dielectric thickness of 50 nm. A 10 mm-long, 2.5 mm-diameter steel rod was used. A minimum capacitance of 2 pF and a maximum of 9 pF are observed. The voltage gain is 3 corresponds to a priming voltage 30V. The power generation is 0.5Â µW when the rod oscillation frequency at 10 Hz. The biggest advantage of this device is the capability of low frequency. That makes the human body motion as a suitable motion sources for it. Figure 7. Fabrication and optical images conclusion The focus of this paper is to present the general idea current achievement of electrostatic energy harvesting. And it gives a related reference for the group project. For most of the electrostatic harvester designs, a relatively high resonant frequency comparing with human body motion is need. However, the low frequency capability of the non-resonant energy harvester with rolling mass shows the possibility of the application of this technology in the projects. Additionally, most of the current devices only have one degree of freedom. The 2D energy harvester design can harvest arbitrary directions motion in a plane, which sufficiently increases the power output of device. However, it needs a high frequency. That makes it not suitable for the requirement of the project.
Sunday, October 13, 2019
Essay on Escape in A Rose For Emily and Yellow Wallpaper
Escape from Reality in A Rose For Emily And The Yellow Wallpaper In the Victorian era, women were thought to be weaker than men, thus prone to frailty and "female problems." They were unable to think for themselves and only valuable as marriage material. The women in Faulkner's "A Rose for Emily" and Gilman's "The Yellow Wallpaper" are driven insane because they feel pigeonholed by the men in their lives. They retreat into their own respective worlds as an escape from reality, and finally rebel in the only ways they can find. Emily and 'John's wife,' the woman in "The Yellow Wallpaper" who is never named, both feel stifled and suppressed by the men in authority over them. Emily, as a "slender figure in white in the background," is prevented from having suitors by her father (p. 505). The narrator of "The Yellow Wallpaper" talks much about how her husband, John, is careful for her, even to the point of urging her to rest completely and not write, yet "does not believe I am sick!" (p. 630). Both women are kept almost completely in the house, idle, with nothing to occupy their...
Friday, October 11, 2019
Essay --
Mrs. Kasper AP Literature 10 February 2014 â€Å"Knowing yourself is the beginning of all wisdom,†urged Aristotle. Wisdom contains many qualities that are valuable to have. These qualities are experience, knowledge, and good judgment. These traits and abilities are essential in insight and understanding that attribute to an effective person. Wisdom is a virtue that develops as one is able to learn from experiences and mistakes. However, the wisdom that Aristotle believed in went beyond the average wisdom of being able to understand concepts or have insight different from others. The wisdom Aristotle believed in was practical wisdom. Practical wisdom is the ability to do the right thing, at the right time, for the right intent. According to Aristotle, this virtue is what makes all the other virtues a possibility. It is practical wisdom that gives one the ability to change one’s flaws because it is a characteristic that is bound with action and reason. It is the ability to have the information and apply it corre ctly. Along with the ability of understanding others, also comes self-awareness, and with the ability to apply action, one can develop and change for the better. In the novel, Pride and Prejudice, by Jane Austen, Charlotte Lucas possesses limited self-awareness; she is aware of the consequences that can come from her choices, but doesn’t choose to apply action for her own self-contentment. Mr. Bennet is also aware at times of his behavior, which is evident through his intelligence and wit, but doesn’t choose to take action, therefore lacking practical wisdom. Through the various conversations and narrations, Austen takes a resolute stand about the need for men to not only understand others, but to know oneself enough to turn we... ...ove his lack of responsible action, and Charlotte Lucas’s inability to take action on achieving contentment, serve as character foils to Elizabeth, illuminating her ability to evaluate her mistakes and take action for the better good. Bennet dismissed his chance to change not because he couldn’t, but because he did not want to. Although he was an intelligent man, it does no good to be smart if one cannot apply intelligence towards self-awareness and towards applying action in turning foibles into strengths Charlotte, also an intelligent character, failed to apply a balance of reasoning and action in her decision, sacrificing a lifetime of happiness for comfort and economic stability. Therein lies the value of Jane Austen’s Pride and Prejudice: It emphasizes that in life, self-awareness is nothing, unless action and reasoning are used in every opportunity to change.
Demo: Wrap a Present
Demo Speech: How to Wrap a Present Introduction I. Open with Impact: At some point in your life you have probably either received or given a gift that looked something like this. (Hold up poorly wrapped gift. ) Nobody wants to be that person at the party with the gift that gets mistaken for trash. When giving a gift to someone it is important to put just as much thought into the gift wrapping as the gift buying. II. Connect with Audience: You may be thinking, but I don’t always have time to make my gift look professionally wrapped. Or, I don’t have the money to go out and buy the supplies I need to wrap a gift.III. Establish Impact: I am guilty of giving the ugliest gift at the party before and I know how it feels. Thankfully, I have changed my ways and learned that gift wrapping is not as intimidating as it seems. IV. Thesis: With just a little extra effort, your gift can be something you are proud to present. V. Preview Main Points: Today, I am going to show you how t o find inexpensive wrapping materials, properly wrap your gift with ease, and complete the look with some finishing touches. Transition: Now before we start, we are going to need some basic materials. Body I. Picking out the paper A.We want to be as cost effective as possible, but we still need enough materials to wrap for all those random family members and friends. 1. The most inexpensive paper can be found at your local discount store. 2. Go to your local dollar tree and pick out your favorite print or solid color wrapping paper. B. Other useful materials 1. You will want to pick out a spool of ribbon for the finishing touch. 2. You are also going to need scissors and clear tape. Transition: Now that we have all of our materials together, let’s get to wrapping. II. Wrapping the present A. Measure your paper 1. Place the gift in the unrolled paper. . Bring the paper up around the gift until you have enough paper to cover the gift. 3. Cut the paper so that you have about an inch of wrapping paper overlapping. 4. Move the box to the edge of the paper so that both sides will reach about halfway up the sides. Repeat this on the other side of the box as well then cut off any excess paper. B. Time to tape 1. Wrap the paper around the box until the paper overlaps and secure with the clear tape. 2. Make sure the box is centered inside the paper then fold the sides until the paper overlaps. Tape the flaps using the clear tape. C. Finishing Touches 1.Measure your ribbon by wrapping it around the present and leaving about 6 inches in excess and cut it. 2. Hold the middle of the ribbon at the top of the gift and wrap the ends around the bottom of the present. 3. Bring the ends through the loop and tie your best bow! 4. Turn the gift over and tape the ribbon to avoid it slipping out of place while being moved around. Transition: Once your gift is perfectly wrapped, you can also add other personal touches such as a decorative name tag or extra ribbon. Conclusion I. I hope that I have shown you that wrapping a gift does not have to be intimidating.There are many inexpensive ways to wrap your gifts and add unique touches. With just a little practice, you can soon become a gift wrapping pro. Don’t be that person with the trash bag gift. Impress everyone with your new gift wrapping skills! Works Cited Banner, Chrissa. How to Perfectly Wrap a Present. 2008. Web. 9 Nov 2012. http://crafts. slides. kaboose. com/105-how-to-perfectly-wrap-a-present/2 Alissa, . â€Å"Christmas Wrappings. † 33 Shades of Green. Pinterest, 16 2009. Web. Web. 9 Nov. 2012. .
Thursday, October 10, 2019
Building systems integration for enhanced environmental performance Essay
   Culture & Technology     Architecture is considered as the art that involves designing and the construction of buildings and since Antiquity, the art of architecture has been known to be closely related and associated with history of art (Jaradat, 2012). The reasons why architecture has been closely related to art is that a lot of the public works, such as the religious buildings were constructed with aesthetics in mind in addition to the functionality of the buildings (Jaradat, 2012). The buildings were built with a primary aim of inspiring people and also perfume the function of serving the public. For this reason, the buildings involved the service of various people in the society which included the craftsmen and various artists in the society.     Furthermore, labourers were also part of the teams that took part in the construction of the buildings ensuring that the artistic features and the functionality of the buildings were brought out as required. The interior of the buildings as well as the exteriors of the buildings were used as showcase for the various fine arts paintings, relief sculptures, frieze, and stained glass (Demkin, & American Institute of Architects, 2008). Furthermore, the decorations included various works of art such as the metalwork and the mosaic. It is also to be noted that the development of public buildings also involved visual arts. From the many centuries that have passed, the primary functions of early architecture were to have a consolidation of security and power within the buildings. Furthermore, the aim of the works of architecture was also to make the gods happy (Jaradat, 2012). It was observed that as the society became richer, the functions that were performed by early ar chitecture also became more important in the society.     According to Emmitt, (2013), there have been a lot of technological developments that have taken place over the past years which have led to the transformation of how buildings are constructed. The development in technology has changed the way buildings are designed and the types of buildings that are being constructed across the world. There has been great change in the materials that are being used by the process engineers in the construction of buildings (Emmitt, 2013). The materials being used in construction of buildings have made the work of the process engineers easier than it was before the developments in technology. It has become possible for the process engineers to construct any type of building that they want, primarily because of the type of materials that are currently being used.    While architectures have continued to adopt the ancient designs and styles of buildings, process engineers have been busy embracing changes that have been brought up by developments in technology, as observed by Quatman, & Dhar, (2003). It is observed that over the centuries, what architectures have been doing in the society is relying on the past ancient designs as guidance. A lot of the architectural works have been influenced by ancient designs meaning that architectures have been slow in embracing changes brought about by technological developments. Compared to architectures, process engineers have been in the forefront in embracing technological advancements (Vough, et al., 2013). Process engineers have been able to embrace technological developments through the materials that they use and the equipment used in carrying out the construction works.     Furthermore, Vassigh, & Chandler, (2011) has observed that architecture has continued to remain immune to the forces of transformation as well as progress over the centuries primarily because the profession has not fully embraced the changes and developments in technology. Architectures have continued to make use of the past designs of buildings to gain inspiration for their work (Vassigh, & Chandler, 2011). It has been observed that architects have been slow in embracing the changes brought by developments in technology compared to the master builders who have been able to make use of technology for new development in building and construction. Furthermore, research has shown that master builders have continued to rise up today in ranks from that of being process engineers to being the primary players in construction of buildings (Marsh, 2000). The master builders have taken the duty of identifying the suitable materials for constructions and the suitable design that can match certain materials. Architects have continued to be reserved in developing new models in construction.      A lot of reservation has been made by architects for the purpose of maintaining the ancient culture in construction of buildings. On the other hand, master builders have taken the challenges of experimenting with new ideas on building materials and types of designs in construction (Marcus, 1989). The developments in technology have made it easy for the master builders to become more innovative in designing of buildings and the construction of buildings. The use f technology has enabled master builders to construct buildings that were never there in the past centuries through the use of material that is more durable. The lack of change in the culture of architects of getting inspiration from ancient buildings from time to time has been a contributor to the view that master builders have risen in ranks more than the architects (Chappell, & Willis, 2013).     It has been observed that both in the private and the public sector, the owners and investors in buildings like to ensure that there is accountability in the buildings that they construct. The accountability that is needed is with regard to the materials being used and the quality of building that is being constructed (Jaradat, 2012). To ensure that there is no confusion and that there is total accountability, the process engineers are the ones that take the whole responsibility. The process engineers are tasked with the issue of designing the buildings, allocating the costs and the types of materials that are supposed to be used. Furthermore, the process engineers are the ones that are in the forefront in determining the type of human resource that is need for the completion of the buildings as per the needs of the owners (Jaradat, 2012).       Therefore, considering that architects are only concerned with the designing, it becomes impossible for the owners of the buildings to hold the architects accountable in case of anything (Vough, et al., 2013). The lack of accountability on the side of the architects has left6 room for the process engineers to take up the responsibility of being accountable. Therefore, the owners of buildings tend to employ the services of the process engineers in terms of the design and the construction of their buildings, leaving the architects out of the loop (Jaradat, 2012). From the perspective of accountability, it can be noted that process engineers are the ones that rise up to the ranks of master builders as compared to the architects who are left to continue undertaking their role of designing (Chappell, & Willis, 2013).      According to Marsh, (2000), over the years, research has shown that there has been great change in terms of leadership in construction projects. It has been observed that owners of constructions, private and public, both have been observed to employ the services of contractors. The use of contractors to take care of the construction project has led to what is referred to as contractor-led construction, an observati0o made by Rajpatty, (2008). Under the contractor-led construction system, the contractor is at the helm of the construction project and is the one that hires the architects to design the buildings. According to research done, the owners of construction projects feel safe with this type of arrangement where the contractor is at the helm. It provides some form of convenience to the client and offers a one-stop-shop where the client can be able to get everything that is needed to complete their project without having to engage the services of differen t people. Rajpatty, (2008) observes that the contractor-led projects create a single point of control and responsibility within a project in terms of designing o9f the buildings and the construction of the buildings.       Furthermore, it has been identified that the system whereby the contractor or the process engineer is at the helm, of a construction projects enhances control over costs and the schedule of the project (Chappell, & Willis, 2013). The client is able to monitor the progress of their buildings as it is being constructed and can be able to trace how the costs are incurred in the project. It has also been noted that clients prefer the contractor-led system in building and construction because it is believed to foster some form of collaboration between the contractor and the client (Marcus, 1989). The end result of the collaboration that is fostered Through the use of the contractor-led system is that there is a process that is less adversarial and the construction of very high quality buildings (Marsh, 2000).      It can be noted that indeed the roles of that the architects play has changed a lot and the role that process engineers play. The process engineers have continued to rise in ranks due to the accountability that clients require, and which the architects find difficult to provide (Vough, et al., 2013). Furthermore, it has been noted above that the aspect of control over costs and ensuring collaboration has also been part of the contributing factors that have led to the rise in the ranks of process engineers as compared to the architects who seem to be immune to change.     Furthermore, it has been noted that technology has been a major booster to the rise in ranks of the process engineers in terms of the materials for construction and the equipment used in the construction projects (Chappell, & Willis, 2013). Therefore, the rise in ranks of the process engineers compared to the architects leads to some questions that need to be answered. Are there any impacts that architects bring in the construction of buildings? Is the role of architects becoming obsolete? What need to be done to improve the role played by architects in the construction industry? These are some of the questions that need to be researched to help understand why process engineers have risen in ranks compared to architect. References Chappell, D., & Willis, A. (2013). The Architect in Practice. Chicester: Wiley. Demkin, J. A., & American Institute of Architects. (2008). The architect’s handbook of professional practice. Hoboken: Wiley. Emmitt, S. (2013). Architectural Technology: Research and Practice. New York: Wiley. Jaradat, S. (2012). The Architect’s Role and Interactions in BIM-enabled Projects.Marcus, P. (1989). Building a Construction Contract That Works: The Owner’s Role. Arbitration Journal, 44(1), 3-14. Marsh, P. D. V. (2000). Contracting for engineering and construction projects. Burlington, VT: Gower. Quatman, G. W., & Dhar, R. R. (2003). The Architect’s Guide to Design-Build Services. Hoboken, NJ: John Wiley & Sons. Rajpatty, S. J. (2008). The Role of the Estimator in Today’s Construction Industry. AACE International Transactions, 1-9. Vassigh, S., & Chandler, J. R. (2011). Building systems integration for enhanced environmental performance. Ft. Lauderdale, FL: J. Ross Pub. Vough, H. C., Teresa Cardador, M. M., Bednar, J. S., Dane, E., & Pratt, M. G. (2013). What clients don’t get about my profession: a model of perceived role-based image discrepancies. Academy Of Management Journal, 56(4), 1050-1080. doi:10.5465/amj.2011.0490 Source document
Wednesday, October 9, 2019
Human Nutrition Coursework Example | Topics and Well Written Essays - 750 words
Human Nutrition - Coursework Example A snack is normally taken in between meals so as to sedate hunger thus maintain an individuals’ energy before taking a meal that is substantial. People with health conditions like diabetes do have meal plans, which have an inclusion of snacks and meals. Response to part b. The interaction between the first four amino acids in chain one and in chain two is the same. However, the last group of six amino acids in chain one and in chain two are different, and that is what brings the different between the two chains. In the first chain, the fourth, and the fifth are all hydrophobic and hence they lie close together clustered together inside the protein chain, attract each other bending the protein chain. On the contrary, the fourth and the fifth amino acids in chain two are hydrophobic and hydropholic. Hence they repel each other pushing the protein chain apart. The last two amino acids of chain 1are both hydropholic hence they attract each other bending the protein chain. However, the last two amino acids of chain two are hydrophobic and hydropholic, hence. Hence they repel each other pushing the protein chain apart. ... It is hydrophilic, insoluble in organic solvents and water, biodegradable, and chiral. Breaking down of cellulose to glucose requires acids that are concentrated and extremely high temperatures. This is a significant difference with the starch because breaking down of starch to glucose neither needs concentrated acid nor high temperatures. In comparison with starch, cellulose is much more crystalline. This implies that starch goes through a transition from crystalline to amorphous after heating that is above 70degrees Celsius. Response to part d. Given that straw berry Jam has carbohydrates content of 65g it implies that 15g of strawberry would have 15/65 = 0.23g. Also given that bread has a carbohydrate content of 48g, it follows that 100g of bread would have 48/100 = 0.48g Therefore, the total amount of carbohydrate content present in a Jam sandwich would be 0.48 + 0.23 = 0.71g = 2.0grams. Four a four-year old boy energy would be 2 multiplied by 4 kcal multiplied by 4.2kj = 33.6 KJ per gram. Since a 12-year old boy requires 1845kj per day, 33.6kj would be not enough for the boy. Response part e. Vitamin C is contained in milk. In skimmed milk, this nutrient is present in extremely minimum quantities. This is so because skimmed milk is made through the removal of all the cream from milk. This makes it have a reduction of some nutrients like fat and vitamin C. Skimmed milk is therefore, not as healthy as the whole milk. The percentage of vitamin A and C in skimmed milk is approximately ten percent. Adult individuals need less than the RNI values quoted for vitamins so as not to exceed the acceptable intake. Consuming vitamins in excess may lead to diseases like scurvy. Response to Question 2 (a) Food group Recommended percentage
Tuesday, October 8, 2019
STOP#3 Essay Example | Topics and Well Written Essays - 500 words
STOP#3 - Essay Example This implies that he values his commitments to the society more than his own desires. The beauty of nature also spoke to the rider, making the scene attractive for the traveler. The journey of personal desire, making a choice, and the beauty of nature were all encompassed in this one poem. The persona has to choose between two worlds. The woods are attractive and seem to offer the speaker a perfect quiet and solitude which he seems to desire. On the other side, there is a different world from the woods- the world with people and societal obligations. Both sides interest the speaker in different ways, but he has to decide which side is the best for him. The world with people however seems more important to the speaker. One cannot avoid decision making in life. While the rider is travelling, he stops between the woods and a frozen lake. The beautiful and alluring woods are the reason he stops. He stares at them for a while before his little horse shakes the bell of its harness. The persona realizes that he has to make a decision on whether he should remain in the attractive woods or continue with his journey probably to the village where he has promises that he needs to fulfill. Nature is attractive due to its beauty. Many people like to stop in order to study it during their journeys. Personal and societal desires can be put aside for a moment to appreciate this beauty. The rider encounters a snowy wood scene. The soft sound of snow falling might have made the traveler feel peaceful. The sharp cold air created a sharp scene of being alive. Nature can comfort more than personal or societal desires. Choices delayed for a moment to appreciate the beauty of the forest snow fall. In the poem â€Å"Stopping by Woods on a Snowy Evening†, the horseman finds an option to pick between personal and societal obligations. The rider wants to enjoy the snowy scene but needs to get
Monday, October 7, 2019
Will involvement affect academic performance Research Paper
Will involvement affect academic performance - Research Paper Example It also outlines the method I used to research and the questions to come up with a substantial conclusion. The method I used in the research was survey monkey which has an online platform where specific questions can be asked for a particular research. The first question I inquired related to the rank of class of an individual. This question enabled me to know the general performance of the class and the various factors that influenced their performance. In cases where the class performance was good, the individual would tell me that they spend much time studying in groups while at times individually. To the contrary, the student whose class was ranked low the students were less involved in their studies in terms of working as a team. The other question that I enquired is about the student’s Grade Point Average (GPA). This would help me to know how the students involved socially perform as compared to the students who kept their studies first. It was evident that those students that were more involved in the social life had a lower GPA while those that concentrated in their studies had a higher GPA. Another question that I asked related to the number of hours a student took to study. This question would enable me to know how the student managed their time during free time. For those that were working, I inquired how much time they were involved in their studies and their social life. This would enable me to know how their involvement in working would affect their studies. I also wanted to find out if the student were involved in any student organizations as it helped me identify the positive or negative impact to a student. The research also made me ask the students how often they went home to visit their families. Some students would say twice a month while others stated that every weekend they travelled to visit their families. I also wanted to find out if the student were dating and the
Sunday, October 6, 2019
What Determines the Level of Interest Rate in the UK And How the Essay
What Determines the Level of Interest Rate in the UK And How the Changes in Interest Rate Affect Economic Growth - Essay Example Most of the monetarist economists argue that monetary policy has a lot of power compared to fiscal policy in as far as inflation control is concerned. Monetary policy also includes changes in exchange rate value due to the fact that currency fluctuation affects macroeconomic activities. Interest rates in the United Kingdom are established by the monetary policy committee of the bank of England according to Cobham (2002). Therefore monetary policy makes a major contribution in determining the level of interest rates. For instance in some countries the monetary authority might possess the power to authorize particular interest rates on loans a well as other financial deals. The monetary policy committee meets regularly to set the relevant interest rates. Monetary policies are defined in two terms that is either expansionary or contractionary. On one hand the expansionary policy increases the economies total money supply in a more rapid rate than usual. Contractionary policy on the othe r hand, expands the supply of money in a slower rate compared to the usual rate or even contracts it. Implementation of Monetary Policy in the UK Monetary policy is usually implemented by either the country’s central bank or reserve bank. ... This is due to the reason that settlement of transactions should take place daily as the business closes and thus banks without sufficient reserves borrow from the Bank of England to meet these obligations. The Bank of England is the only guarantor of such funds and is able to set interest rates in which it provides the funds. In implementing monetary policy the bank passes cost of interest rates to clients in commercial banks inform of interest charges on mortgages as well as other types of loan. If the lending rate also known as dealing rate of the central bank changes, the bank makes an adjustment to their rates of lending. Through the relationship between lending rate and commercial rates, the bank of England is able to influence the interest rates in the market. This way the Bank of England upholds its implementation of the monetary policy. For instance incase inflation increases behold the target rate, the Bank is capable of hiking the lending rate charges on the commercial ban ks. This is usually in an attempt to slow the rate of spending hence bringing back inflation to the right level. According to Richter (2008), the monetary policy of the Bank of England is to provide stability in prices and lower inflation thus supporting the economic objectives of the government including employment. The bank of England has three major tools which they use in implementation of monetary polices. The tools can be used in expanding or contracting supply of funds of the country based on response of the policy to current economic situation. The three tools include: discount rates, open market operation rates and reserve requirements of changing banks. Reserve requirement is one of the tools used in
Saturday, October 5, 2019
What are dynamic capabilities and how do they differ from static Essay
What are dynamic capabilities and how do they differ from static capabilities - Essay Example It is basically hands on situation where a problem arise you solve it without having any planned solution in mind. This means that although knowledge may exist in people it can only be expressed within the organisation. As Winter said 'firms are organisations that know how to do things' (Winter, 1988, p.175). Winter is emphasizing the importance of being a part of an organization that is you are most likely to tackle a problem depending on the situation. Tacit knowledge is tough to replicate or imitate. If possible, it can only be transferred through teaching by example, and then this is only the case with knowledge which is observable. Thus this makes an organisational capability into a source of maintaining competitive advantage. Dynamic capabilities, as known today, are a set of specific and identifiable processes such as product development or strategic decision making with expected outcomes. They are detailed, analytic and stable processes for globalized manufacturing companies to continuously improve their performance and gain competitive advantage through establishing new plants and shutting down non-performing units. Thus dynamic capability is "a learned and stable pattern of collective activity through which the organization systematically generates and modifies its operating routines in pursuit of improved effectiveness" (Zollo and Winter, 2002). This proves that dynamic capabilities are procedures and understandings that help organizations to develop more competent practices and search for more efficient technologies, new or improved products and manufacturing process. According to Teece, Pisano and Shuen, many strategy scholars remain doubtful about the value of the concept of "dynamic... Dynamic capabilities, as known today, are a set of specific and identifiable processes such as product development or strategic decision making with expected outcomes. They are detailed, analytic and stable processes for globalized manufacturing companies to continuously improve their performance and gain competitive advantage through establishing new plants and shutting down non-performing units. Thus dynamic capability is â€Å"a learned and stable pattern of collective activity through which the organization systematically generates and modifies its operating routines in pursuit of improved effectiveness†. This proves that dynamic capabilities are procedures and understandings that help organizations to develop more competent practices and search for more efficient technologies, new or improved products, and manufacturing process. According to Teece, Pisano, and Shuen, many strategy scholars remain doubtful about the value of the concept of â€Å"dynamic capabilities.†Though it is seen as a key to competitive advantage, critics rather believe that they are born and not made meaning they are skeptical about them being the intentional genuine option for managers instead. However one can only accept this proposal productive only if it is widely adopted.
Friday, October 4, 2019
United Nation Organization Essay Example for Free
United Nation Organization Essay United Nations Organisation was established after World War II with a motto to maintain world peace. And this in fact is known to every one of us in general. But the question is, was this really successful in doing the same i.e., maintaining the peace in every part of the world or are there any failures? Perhaps this is also one of the most important area to assess. Successes and Failures of the United Nations since its establishment, i believe is a very essential topic to be focused. Here are some of the positive roles played by UN and its failures. Successes of the United Nations The First and foremost it has prevented the occurrence of any further world wars. Instrumental in the maintenance of international balance of power. It played a Significant role in disarming the world and making it nuclear free. Various treaty negotiations like Partial Test Ban Treaty and Nuclear non-proliferation treaty have been signed under UN. Demise of colonialism and imperialism on one hand and apartheid on the other had UN sanctions behind them. UN Acted as vanguard for the protection of human rights of the people of the world, Universal Declaration of Human Rights, 1948. Despite crippled by Bretton Woods Institutions, UN has played limited but effective role on economic matters. Supported the North-South dialogue and aspired for emergence of new international economic order. Agencies of United Nations like WHO, UNICFF, UNESCO have keenly participated in the transformation of the international social sector. Peace keeping operations, peaceful resolution of disputes and refugee concerns had always been on the list of core issues. Since 1945, the UN has been credited with negotiating 172 peaceful settlements that have ended regional conflicts. The world body was also instrumental in institutionalization of international laws and world legal frame work. Passage of various conventions and declarations on child, women, climate, etc, highlights the extra-political affairs of the otherwise political world body. It has successfully controlled the situation in Serbia, Yugoslavia and Balkan areas. A number of peace missions in Africa has done reasonably well to control the situation. Failures of the United Nations: UN opinion on Hungary and Czechoslovakia were ignored by the erstwhile Soviet Union in 1950s. Israel had been taking unilateral action through decades in its geographical vicinity and nothing substantial has come out even by September 2010. No emphatic role in crisis of worst kinds like the Cuban Missile Crisis, Vietnam crisis etc. UN was nowhere in the picture when the NATO rained bombs over former Yugoslavia. Uni-polarity and unilateralism has shaken the relevance of the world body. Unilateral action in Iraq was bereft of UN sanction. Failed to generate a universal consensus to protect the deteriorating world climate, even at Copenhagen in 2009. Number of nuclear powers in the world has kept on increasing. UN Could not control the horizontal expansion and proliferation of weapons and arms. Financial dependence on the industrialized nations has at times deviated UN from neutrality and impartiality. The world body has failed to reflect the democratic aspiration of the world. Without being democratic itself, it talks of democratization of the world. Aids is crossing regions and boundaries both in spread and intensity. Domestic situation of near anarchy in Iraq and many regions of Afghanistan, despite on active UN. The US President scheme of withdrawal has not able to bring any specific solutions in the region. In fact, the situation has been further aggravated. The UN totally exposed in the case of US invasion on Iraq in name for the search weapon of mass destruction. US has withdrawn its combat forces but the law and order and mutual distrust has worsened and at this juncture UN seems to be clueless.
Thursday, October 3, 2019
Concurrent Execution of Database
Concurrent Execution of Database Question 1: a) What is meant by concurrent execution of database in a multi-user system? Discuss why concurrency control is needed giving a suitable example. How the concept of Time stamp based and validation is based Protocols used in concurrency control. Ans:- Multiple transactions are allowed to run concurrently in the system. Concurrent execution of database is meant by execution of database in parallel. I.e. each transaction must behave in isolation. This means that the concurrent execution does not result an inconsistent state. Ensuring consistency in spite of concurrent execution of transactions requires is very complex Advantages are: increased processor and disk utilization, leading to better transaction throughput 4 E.g. one transaction can be using the CPU while another is reading from or writing to the disk reduced average response time for transactions: short transactions need not wait behind long ones. Timestamp Protocol: Timestamp is a unique identifier to identify a transaction. Timestamp can be considered to be as the transaction start time. It determines the concurrent execution such that the timestamp determines the serializability order. Time stamp holds two timestamp values: W-timestamp() is the largest time-stamp of any transaction that executed write() successfully. R-timestamp () is the largest time-stamp of any transaction that executed read() successfully. Suppose that transaction Ti issues write (Q). If TS (Ti) < R-timestamp (Q), then the value of Q that Ti is producing was needed previously, and the system assumed that that value would never be produced. Hence, the write operation is rejected, and Ti is rolled back. If TS (Ti) < W-timestamp (Q), then Ti is attempting to write an obsolete value of Q. Hence, this write operation is rejected, and Ti is rolled back. Otherwise, the write operation is executed, and W-timestamp(Q) is set to TS(Ti).The timestamp-ordering protocol guarantees serializability since all the arcs in the precedence graph are of the form. Timestamp protocol ensures freedom from deadlock as no transaction ever waits. Validation Protocol: The optimistic concurrency control techniques also known as validation or certification techniques, no checking is done while the transaction is executing. Several methods use the validation technique. Execution of transaction Ti is done in three phases. Read and execution phase: Transaction Ti writes only to temporary local variables Validation phase: Transaction Ti performs a validation test to determine if local variables can be written without violating serializability. Write phase: If Ti is validated, the updates are applied to the database; otherwise, Ti is rolled back. The three phases of concurrently executing transactions can be interleaved, but each transaction must go through the three phases in that order. Each transaction Ti has 3 timestamps Start(Ti) : the time when Ti started its execution Validation(Ti): the time when Ti entered its validation phase Finish(Ti) : the time when Ti finished its write phase This protocol is useful and gives greater degree of concurrency if probability of conflicts is low. That is because the serializability order is not pre-decided and relatively less transactions will have to be rolled back. Question 2: Why does deadlock occur in concurrent execution of transaction where locking scheme is followed? How can you detect deadlock in database system? How is the problem of deadlock resolved? Explain with the help of an example. Ans: Although locks prevent serious data inconsistencies but their use may lead to a major problem. The schedule may create deadlocks. A database deadlock is caused when two transactions wait for each other to unlock data. Deadlocks can be managed by using deadlock detection and prevention techniques. A deadlock is a condition that occurs when two transactions wait for each other to unlock data. Deadlocks occur when two transactions T1 and T2 exist in the following mode: T1 locks data item X and it needs to access Y while Y is locked by T2 T2 locks data item Y and it needs to access X while X is locked by T1 If T1 has not found unlocked data item Y and T2 needs Y, T2 cannot begin, if T2 has not unlocked data item X and T1 needs X, T1 cannot continue. Consequently T1 and T2 wait indefinitely, each waiting for the other to unlock the required data item. Three basic techniques exist to control deadlocks:- Deadlock prevention Deadlock detection Deadlock avoidance Deadlock prevention:- A transaction requesting a new lock is aborted if there is a possibility that a deadlock can occur. If the transaction is aborted, all the changes made by this transaction are rolled back, and all locks obtained by the transaction are released. The transaction is then rescheduled for execution. Deadlocks prevention works because it avoids the condition that leads to deadlock. In deadlock prevention, timed out schemes are used. Deadlock detection:- The DBMS periodically test the database for deadlocks. If a deadlock is found one of the transactions is aborted and the other transaction continues. The aborted transaction will be rescheduled for execution later on. The system uses wait- for graph. The system is in deadlock state if and only if the wait-for graph has a cycle. Deadlock avoidance:- The transaction must obtain all the locks it needs before it can be executed. This technique avoids rollback of conflicting transaction by requiring that locks be obtained in succession. The serial lock assignment required in deadlock avoidance increases transaction response. Example:- Deadlock checking occurs when a transaction has waited 30 seconds; no lock wait timeouts occur. Question 3: What is two phase locking? Describe with help of an example. Will two phase locking result in serialisable schedule? Will two phase locking result in deadlock? Justify your answer with the help of an example Ans: Two phase locking defines how transactions acquire and relinquish locks. Two phase locking gurantees serializability but it does not prevent deadlocks. The two phases are: Growing phase in which a transaction acquires all the required locks without unlocking any data. Shrinking phase in which a transaction releases all locks and cannot obtain any new lock. The two-phase locking protocol is governed by the following rules: Two transactions cannot have conflicting locks. No unlock operation can precede a lock operation in the same transaction. No data are affected until all locks are obtained that is until the transaction is in its locked point. Yes, two phase locking will result in deadlock because when mutual blocking between transactions occurs then it results deadlock. When deadlock occur, the execution of these transaction cannot be completed. So deadlock need to be resolved for completion of these transactions. Example:- In this example, the transaction acquires all the locks it needs until it reaches its locked point. When the locked point is reached is reached, the data are modified to confirm to the transaction requirements. Finally, the transaction is completed as it releases all of the lock it acquired in the first phase. Question 4: When do we use Log based recovery technique? Explain the write ahead log strategy for recovery in a centralized DBMS, with the help of an example. Ans: It is mostly used to structure for recoding database modifications. In a log based recovery a a log file is maintained for recovery purpose. Log file is a sequence of log records. There are two techniques for log based recovery. Deferred database modification: it ensures transaction atomicity by recording all database modifications in the log, but deferring the execution of all write operations of transactions until it is partially committed. Immediate database modification: it allows database modification to be output to the database while the transaction is still in the active state. The Write Ahead log is the basic rule that ensures that a record of every change to the database is available while attempting to recover from a crash. That is if a transaction makes a change and is committed, then the no force approach means that some of the changes may have not been written to the disk at the time of crash. Without any record of changes there is no way to ensure that the changes of a committed transaction survive crashes. For this before writing a page to the disk every update log record that describes a change to the page must be in a stable storage Question 5: Assume that the Railway reservation system is implemented using an RDBMS. What are the concurrency control measures one has to take, in order to avoid concurrency related problems in the above system? How can the deadlock be avoided in this system? How can we implement recovery techniques in such a system? Ans: When several transactions execute concurrently in the database, however there is a chance, the isolation property may no longer be preserved. To ensure that it is, the system must control the interaction among the concurrent transactions; this control is achieved through one of a variety of mechanisms called concurrency-control schemes. TYPES OF CONCURRENCY CONTROL SCHEME Lock-Based Protocols Timestamp-Based Protocols Validation-Based Protocols TO AVOID DEADLOCK: To ensure that no cyclic waits can occur by ordering the requests for locks. Deadlock recovery, and performs transaction rollback instead of waiting for a lock, whenever the wait could potentially result in a deadlock. DEADLOCK RECOVERY TECHNIQUE- To maintain information about the current allocation of data items to transactions, as well as any outstanding data item requests. Provide an algorithm that uses this information to determine whether the system has entered a deadlock state. Recover from the deadlock when the detection algorithm determines that deadlock exists. Question 6: How can we use the concept of shadow paging in database recovery of a real time application? Ans: It is an alternative to log-based recovery techniques. It may require fewer disk accesses but it is hard to extend paging to allow multiple concurrent transactions. The idea is to maintain two page tables during the life of a transaction: the current page table and the shadow page table. When the transaction starts current and page tables are identical. The shadow page is never changed during the life of the transaction. The current page is updated with each write operation. Each table entry points to a page on the disk. When the transaction is committed the shadow page entry becomes a copy of the current page table entry and the disk block with the old data is released. If the shadow is stored in nonvolatile memory and a system crash occurs, then the shadow page table is copied to the current page table. This guarantees that the shadow page table will point to the database pages corresponding to the state of the database prior to any transaction that was active at the time of the crash, making aborts automatic. It is used as an improvement to the shadow copy technique. The key idea of shadow paging is to maintain two page tables during the life of a transaction. Shadow paging helps in better recovery from crashes and also it does not require any undo/redo technique. The disadvantage of shadow paging is that it changes the disk address of the current page table and also copies the actual data block from the RAM to the hard disk output operation. There are drawbacks to the shadow-page technique: Commit overhead. The commit of a single transaction using shadow paging requires multiple blocks to be output the current page table, the actual data and the disk address of the current page table. Log-based schemes need to output only the log records. Data fragmentation. Shadow paging causes database pages to change locations. Garbage collection Each time that a transaction commits, the database pages containing the old version of data changed by the transactions must become inaccessible. Such pages are considered to be garbage since they are not part of the free space and do not contain any usable information. Periodically it is necessary to find all of the garbage pages and add them to the list of free pages. This process is called garbage collection and imposes additional overhead and complexity on the system.
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