Wednesday, July 31, 2019

Reliance Fresh Essay

Reliance Retail a convenient store format, is governed by the Mukesh ambani and is the most important part of Reliance Industries retail Business. It also comprises more than 2000 reliance stores(October 2014) all over the country. The outlet sells foods, groceries, apparel s and footwear. A distinctive Reliance Fresh outlet is around 3000 to 4000 sq. feet and accommodates catchment area of one to three Kilometers. Reliance retail is spread over 155 cities. History of Reliance Retail The Reliance Retail had to face various difficulties before the launch of Reliance fresh, because of the various circumstances prevailing in Orissa, West Bengal and UP, along with the news focusing on the dearth of vegetables and fruits stocks. The retail business of Reliance then minimized its exposure in vegetable and fruit business, as a result established Reliance fresh positioning a pure super market play focusing on various categories like IT, consumer durables, home, FMCG and food. The retail company of Reliance may not supply the vegetables and fruits in a few states, the Reliance Fresh decided to not to race with local wholesalers partly because of the incapability to maintain a healthy supply chain. The first ever a Reliance Fresh store was established in Hyderabad, wherein the company, mainly focused on the fresh produced vegetables and fruits at comparatively low price. Subsidiaries and Divisions: 1.Reliance Fresh: Retail outlets of fruits, vegetables &groceries. 2.Reliance Digital: Consumer electronics retail stores. 3.Reliance jewels: Jewellery 4.Reliance Timeout: Stores of books, music, movies 5.Reliance Market: Wholesale cash n carry Objectives:- To provide high quality products for the customers. To reduce spoilage through its supply chain & logistic networks. To enrich  customer’s shopping experience through customized offer & ‘value for money’ merchandise. To foster relationship with partners. To increase agribusiness in india and timely payments to farmers. To reduce gap between customer and manufacturer.

Refugee Blues

Positive Image| Negative Image| Effect| Some are living in mansions| Some are living in holes| This shows that while some people are very well off, others, like the refugees, have nowhere decent to live. | Evert spring it blossoms a new| Old passports cant do that| A tree can grow but a passport cant| Saw a poodle in a jacket fastened with a pin| But they weren’t German Jews my dear| Saying how pets get more luxuries then them| Saw fish swimming as if they were free| Only ten feet away | The fish have more freedom then them|Use of language| Example| Effect| Use of repetition| We cannot go there now, my dear, my dear cannot go there now. (â€Å"my dear† repeated in each stanza)| Emphasize how bad there situation is| Language conveying sadness or despair| Asked me politely to return next year, But where shall we go to-day my dear, where shall we go to-day? Makes us feel sympathetic to them | Language about the political situation and the behaviour of the officials| The co nsul banged the table and said: â€Å"if you've got no passport you’re officially dead†| The consul sounds cruel because he’s basically saying they are dead even though they are alive| Language about homelessness| Dreamed I saw a building with a thousand floors, a thousand floors; a thousand windows and a thousand doors; and not one of them was ours, my dear, not one of them was ours. Makes it sound like they are surrounded by so much shelter but they are not allowed in any of them| Language about war| Ten thousand soldiers marched to and fro. Looking for you and me, my dear, looking for you and me| Ten thousand soldiers are looking for two people- All the soldiers are looking for the Jews| | | | | | | Refugee blues- blues musicTen million souls (religious, holy, implies we are all the same) Society is unfair on the way it treats people (some are living in mansions, some are living in holes) Atlas – there not anywhere close to there home, Palestine or Ger many The natural world is in a continual state of renewal, they lost their passports and are no longer citizens They are told to wait and then come again next year – uncaring He compares the angry speeches by Hitler to he thunder in the sky The poodle and cat are treated better then the German views (they cant give the same care to their fellow human beings) Pathetic fallacy- the weather matches the mood of the poem (the snow) Refugee blues is very relevant today, the refugees in England DEJECTED – you've given up on life rejection and despair (dispirited, disheartened, poignant, depressing, Foreboding, mournful, despair, bitterness, resentment, anger)

Tuesday, July 30, 2019

Eddie plays Essay

The third of these parts is an actual character in the play. Alfieri plays a lawyer that Eddie goes to for advice. Alfieri works in a poor community and only deals with small neighbourhood affairs. ‘Morally and Legally you have no right, you cannot stop it’ is a piece of advice Eddie receives from Alfieri, he ignores the advice and chooses to deal with it his own way by breaking the neighbourhood code of honour. Alfieri as a character feels he can no longer change Eddie’s mind and feels rather powerless at this time. The last part Eddie plays is the epilogue. This is the small speech Alfieri says at the end of the play which is rather like a eulogy. A eulogy is a speech made at a funeral. It usually outlines the good points about the deceased person. When the play is portrayed on stage, Alfieri has a very important part to play as the epilogue. The speech has to look effective, the lights dim down and Alfieri talks to the audience. This speech is aimed at the audience and ends the play on a serious note.. The epilogue takes an effect on the on the audience as there are women ‘keening’ on the stage in other words crying on there knees. This has strong effect on the audience while Alfieri’s reading the epilogue. This is seen as reflective time following the sudden violent action of Eddie’s death. Alfieri try’s to say good things about Eddie. He describes him ‘ I think I will love him more than all my sensible clients’ the epilogues message is saying something nice about Eddie. Alfieri is saying Eddie’s case is very different to the rest of his cases he has dealt with . Eddie added excitement to Alfieri’s normally dull lifestyle and Alfieri will miss that. By the saying ‘settle for half’ Alfieri means the audience would probably settle for compromise. In ‘ A View from the Bridge’ Eddie is see as the hero, unfortunately every tragic hero has a weakness and for Eddie his tragic Weakness is his desire for Catherine his Niece. Eddie finally realises he can’t have her When Beatrice tells him in the final scene. She begins telling Eddie she loves him, when he doesn’t respond she tells him ‘you want somethin’ else Eddie and you can never have her! ‘ The actress wouldn’t be angry while delivering the phrase but she wouldn’t be happy either. To face up to their partner loving someone else is very hard, especially telling them you know and finding out it’s your niece. Catherine and Eddie react in horror to what they have just heard and Eddie continues to deny it. Eddie is so full of horror at hearing this speech because he knows his secret is out, it’s also the shock of someone saying you fancy your niece. This gets translated into anger against Marco because Eddie has been getting more and more annoyed and when Beatrice tells him he sees Marco’s challenge outside as a means of physically venting his anger, pain and frustration. The revelation to himself of his desires for Catherine would be tearing his mind apart so the audience would see a an virtually insane. As in a Greek tragedy Marco is seen as Eddie’s inevitable doom, Eddie cannot escape death. There have been many failed attempts to prevent the final tragedy, these have been made by Alfieri, Catherine, Beatrice and even Rodolpho. Rodolpho tries to stop Eddie by saying ‘No he has children, you will destroy a family’ But this still doesn’t stop Eddie fighting with Marco. As soon as Eddie finds out about Rodolpho and Catherine he is on the path to destruction. This is shown in the final meeting Eddie has with Alfieri, also when he returns home drunk to find Rodolpho and Catherine have probably had sex. In the play Eddie has a high demand for respect this can often affect other characters in the play as Eddie reels them in and gets them involved. At the start of the final scene Eddie tells Beatrice that if she attends the wedding she can’t come back to their house. When Eddie tells Beatrice she can’t return to his house the audience would be quite surprised. Beatrice having to miss out on her niece’s wedding just because Eddie doesn’t want to lose his pride. The audience would be telling Beatrice just to go to the wedding but she doesn’t want to lose Eddie. Eddie feels that Catherine owes him respect because he took her in after her mother and father died and he also paid for her stenograph lessons so she could get a well paid job. Catherine then enters from the bedroom and seems as if she didn’t hear Beatrice and Eddie’s conversation. She ask’s Beatrice if she’s ready as the wedding starts at three and the ‘priest won’t wait’. When Eddie asks Beatrice whose side she’s on, Catherine reacts differently to her whole attitude throughout the play. She suddenly shouts ‘Who the hell do you think you are? ‘ this makes an impression on Beatrice and Eddie. Moreover, the audience have not heard her speak like this before. Beatrice tells Catherine to ‘sssh’ but Catherine doesn’t listen and continues to insult Eddie. This is quite shocking to the audience because at any moment Eddie could hurt Catherine as the audience know what he’s capable of and can see the anger in his eyes. As Catherine continues Beatrice also tells Catherine to shut up but she doesn’t listen. Beatrice ignores Catherine when she tells her to come this is when she calls Eddie a rat. ‘He bites people when they sleep! He comes when nobody’s lookin’ and poisons decent people. In the garbage he belongs’. Catherine refers to Eddie as a sewage rat because he is under the ground and lower than anyone else. Catherine feels Eddie belongs in the garbage. Also Miller is using a pun. The American colloquialism ‘to rat’ on somebody is the same as the English ‘grass’ somebody up which is wha ople had for Eddie. By telling what Eddie had done, Marco took away the respect Eddie had, therefore he stole his name-which is referred to as a mark of respect. When Eddie addresses the people about Marco stealing his respect he talks about all he has done for Marco and Rodolpho. He explains how he took them in and how he’d never even seen them before. He makes vague references to the bible and feels he offered them sanctuary from the world outside and the law. ‘ Little bits of laughter even escape him as his eyes are murderous’. This is a sentence from the stage directions when Eddie is saying his speech to the neighbourhood. This is the first part which shows Eddie is becoming virtually insane with anger. His anger is continually boiling up over the whole play and the argument with Marco is a time when he can let it all out and it adds to the excitement of the argument. The way Eddie speaks makes him seem to be going virtually insane. He makes the argument out as if it’s all Marco’s fault and even seems to forget about Rodolpho a and Catherine. In his speech Eddie starts it off with a series of rhetorical questions and it doesn’t matter because Eddie doesn’t give Marco time to answer. Miller makes Eddie say the speech because Eddie’s anger has had a dramatic effect on the audience. The speech is very similar to other tragedies. Eddie’s address is like an aria in an opera, full of passion which here is making Eddie almost incoherent. Eddie gives Marco an option, if he gives him his name back they can go peacefully to the wedding. Of course Marco declines. When Eddie makes the offer to Marco, He makes it in the street in front of everyone. He feels Marco has done wrong and he continues to deny telling the immigration bureau. Eddie just wants Marco to tell the neighbourhood he was lying then everything will be ok. However, Eddie’s tone of contempt would grate in the audience. The public confrontation that Eddie and Marco have is typical of western cowboy films. This relates to Millers opinion that the Brooklyn waterfront was like the ‘wild west’. The participants usually walk 10 paces then face each other and fight like a duel. Cowboy films were very popular in the 1950’s with actors like Alan Ladd, Gregory Peck and John Wayne.. The idea of a western confrontation comes from the phrase ‘A man’s gotta’ do what a mans gotta’ do’. Arthur Miller once said the waterfront in the 1950’s that it was ‘the wild west, a desert beyond the law’. The confrontation Eddie and Marco have is based on the idea of a man has to stand up for what he believes in and Eddie is doing that by asking for his name back but Marco was also doing that because he believed he should have told the neighbourhood what Eddie had done. The duel between Eddie and Marco is very much like that in a typical Wild West film. Like gunfighters approaching each other down the high street, Eddie and Marco are approaching each other across the stage. Each as in a typical western duel challenges the other. Eddie says ‘ Marco, tell them what a liar you are! Both actors have their arms outspread similar to the gun fighter’s hands hovering above their hoisted guns. Like in a cowboy duel Eddie makes the first move ‘lunging’ for Marco. As in a western the spectators gasp in surprise however Marco’s superior strength strikes Eddie to the ground. Marco calls Eddie ‘Animal! ‘ showing that Eddie can no longer consider himself human. This is similar to Catherine earlier calling him a rat. Marco also shouts ‘ Get on your knees to me’ this is the dramatic way Marco demands respect. Miller emphasises Marco’s rage by use of exclamation marks. However Eddie breaks the rules of the duel by producing a knife causing Marco to step back. When the audience see Eddie go down they would probably be shocked because although the story is like a Greek tragedy the audience might not have known that. When Eddie goes down the audience would be happy Eddie can cause no more damage but as the hero the audience will have become rather attached to him. When Eddie produces the knife they would be surprised but anxious at the same time. They know that either Eddie or Marco is going to die, the way the actors portray the fight would affect the way the audience felt. The knife ‘ups’ the stakes and makes a violent death even more of a possibility. When Eddie and Marco begin to fight, Louis try’s to intervene and stop them ‘ for Christ’s sake! ‘ When Louis says this Eddie raises the knife and appears as if he’s going to strike as Louis has seen the way Eddie is acting he believes he will do it and steps back, leaving Eddie and Marco to face each other. Miller makes Louis intervene as a sort of last resort to stop the fight. His wife, his niece and his wife’s cousins have all attempted to stop the fight happening and each of them have failed. Miller feels that a friend can usually stop you doing something that isn’t right. Unfortunately Eddie made a big mistake using a knife because this fight is becoming his last. Marco intentionally turns the blade inwards and forces Eddie to stab himself. This ties in with the idea of a Greek tragedy. The hero facing his inevitable doom. From the beginning of the play Marco was seen as Eddie’s inevitable doom. ‘ A View from the Bridge’ is similar to other tragedies where the hero meets his inevitable doom. ‘Macbeth’ written by William Shakespeare arised from the idea of a Greek tragedy. The main character mentioned in the title, meets his inevitable doom at the end of the play. Another play written by Shakespeare, Romeo and Juliet also arises from a Greek tragedy when two of the main characters meet their doom. I was quite shocked when I heard the end of the play. Even though I knew it was a Greek tragedy I didn’t expect Eddie to die. From the way Miller describes Marco’s appearance I could tell he would probably cause some trouble. When Marco picked the chair up over Eddie you could tell Marco wasn’t afraid of confrontation if necessary. I think that the message Miller was trying to get across is that fighting isn’t the answer and that whatever happens was meant to happen, it’s your fate. At the end when Alfieri says the epilogue I think Miller means we can come to a compromise and if they can’t then walk away, or else we to will have to face the same consequences as Eddie Carbone.

Monday, July 29, 2019

Argument Essay Example | Topics and Well Written Essays - 1250 words

Argument - Essay Example For example, CI requires that a rational individual is moral if the end of their actions is to promote the good of all. Therefore, CI is the best theory in precisely articulating human reasoning and decision making, and relating these to free human will compared to other decision theories. Moral actions are indicative of rationality, with an immoral action indicating irrationality in an individual. A moral action has to be universal in that it has to stand true in any event anywhere. For example, stealing is immoral; it causes pain to the owner while it may result to pleasure in the one stealing. Causing pain is immoral as it leads to suffering, implying that such an act when committed by a rational being would be immoral. Stealing is thus a crime universally as it violates CI theory, which is a universal law of morals. Being a universal law, Kantian CI becomes the best theory that explains why individuals have to decide in a certain way. For example, considering the relational Diale cts theory in a similar case, the theory requires us to consider issues around us, which help people to construct meaning in any relation. Thus the theory is based on specific circumstances as it requires one to consider cultural and social rational systems. This implies the theory applies to multicultural diversity (Turner, 2004). Thus stealing according to this theory may be justified in some cases as it directs people to construct certain meanings in a specific setting of relationships. On the other hand, the how we decide theory is largely based on observable behavior from outside as one cannot access the mind of the individual. For example, asking why does a an individual steal would lead to detailed examinations of their behaviors and history in finding elements that may explain such behaviors in deciding if the individual is actually on the wrong. Such an observation may sometimes be inaccurate and may lead to a wrong conclusion. Therefore, the advantage of CI theory is that it is based on a universal law and is not relative as the other two theories, which depend on specific circumstances. The issue of personal freedom in making a decision is of much importance, and precisely bestows the responsibility of an action on the particular individual. As Kant’s CI theory explains, freedom is an important element in reasoning, whose function cannot be ignored. Thus, without assuming freedom, an individual cannot act (McCormick, 2005). In other words, an individual is not a robot or causal agent that only serves to implement orders. Thinking in such direction would deny humanity its own existence and purpose. Freedom is thus a central focus in decision making and reasoning; an individual is at will to decide in any direction. In this theory, Kant places the consequence of each action on the specific individual, and not on a system of events that may be explained to be the causal agents behind such an action. However, considering the how we decide theory, the major limitation is the assumption that humans are not rational. Thus, the theory traces human action not from the specific individual, but from a system of factors and history that plays to shape and define human actions. This would relegate humanity to being a causal agent that is not responsible for

Sunday, July 28, 2019

How U.S. Government and regulatory bodies can manage business cycles Essay

How U.S. Government and regulatory bodies can manage business cycles - Essay Example Business cycles can be defined as larger fluctuations in the economic activities or in the production of goods and services over a long period of time. It is sometimes known as economic cycle and is often associated with periods of high economic growth. The business cycle therefore consists of periods of economic booms as well as periods of economic recession or decline. The measurement for the business cycle is often done by the government through the measure of the Gross Domestic Product (GDP) of a particular nation. It is however important to note that even though it is termed as a business cycle; it does not follow ant pattern or any mechanically predictable pattern (Lynch, 85). In this context, it is therefore difficult to tell what pattern or direction the future cycle will take. This presents a challenge to the managements of the business cycles and call for better ways of forecasting. The explanation of the causes of the business cycles remains some of the controversial issue s in the analysis of economic growth in many economies (Hill, 320). One of the most common known causes of business cycles is the disequilibrium commonly known as the Keynesian theory. This theory is based on the argument that the fluctuation in the economy often begin because of lack of demand for the workers or labor. The argument here is that labor market or demand for labor do not adjust immediately but take very long time and hence it is difficult for the government to adjust appropriately and at the right time (Agnew, 197). The lack of demand for workers often adjust after very long period of time and the result of this is that it takes time. Moreover, the wages for labor and the prices are sticky as some are not easily adjustable and hence it takes very long time for the labor market to respond to the demand. â€Å"If output goes down it is due to that market fails to clear pushing the economy into recession† (Brentani, 109). This explains the downwards and the upward trends in the economy that forms the business cycles witnessed not only in the United States of America but also in the other nations across the world. The real business cycle theory on the other hand asserts that the changes or the fluctuations in business occur as a result of real factors. It is important to note that this theory believes that the government should not take part in controlling the market forces. The market forces of demand and supply should be left to adjust on their own (Treve, 72). The intervention of the government through the monetary as well as fiscal policies is not necessary, because the economy is capable of adjusting to the changes on its own. This theory also puts more emphasis on the substitution of labor and technological shocks as the major causes of business cycles. Failure of the economy to adjust to these changes would therefore lead to economy moving to recession. With regard to this theory, the rates of changes or the degree to which workers resp onds to incentives determines the supply of labor. Fluctuations in the level of technology also have serious impacts on the labor productivity because it affects the incentives (Knoop, 251). The high rise in technology would improve the productivity of labor and hence the real wages would rise as well. This would then result into the increase in the output and rates of employment and vice versa. This theory has also considered other factors like terrorism, disasters, political unrests, weather conditions among other factors that can affect output of an economy. In this way of argument, money does not impact on output neither does output impact on money and hence both move together in the same direction (Knoop, 253). Real business cycle theory is thus very important in the understanding of business cycle theory. However, just like any other theory, it is not perfect and has its own limitations. The

Saturday, July 27, 2019

LEADERSHIP AND CHANGE MANAGEMENT Essay Example | Topics and Well Written Essays - 2750 words

LEADERSHIP AND CHANGE MANAGEMENT - Essay Example In order to meet the new business situation, the company had to implement many changes. This paper investigates the change that has taken place in SMC since the acquisition. The research provides company’s profile and its history as a basis for further investigation on the influence of the acquisition and a new parent Sinosteel Corporation (Sinosteel) on the Midwest Corporations. The purpose of this study was to research and critically examine the change process in SMC, analyze the impact of the change on employees and on the company as a whole. Some critical review and recommendations are based on the leadership knowledge. The methodology of the study implies a review of related academic journals that helped to examine the company’s changing process. A questionnaire was filled in by SMC employees to provide the researcher with a clear picture of how in particular the change was implemented. A list of key questions will be made for interviewing a SMC decision-making exe cutives was based on the data collected from the questionnaires and conceptual framework from the journals. 2. Introduction and Objectives The purpose of the study was to review and critically analyze the changing process that took place in Sinosteel Midwest Corporation. Before the acquisition the company was operated by its founder and several major shareholders, as top executives and broad members. Most of these executives (i.e. broad members) left the company having sold their shares to Sinosteel, the company’s current owner. The major objectives of the company were changed too. Previously, the main goal of Midwest was looking for strategic investors (business partners) to finance the company’s iron ore projects development. Midwest was then supposed to use its revenue from selling iron ore to pay back to the investors. To change the situation, Sinosteel, as one of the biggest Chinese iron ore traders, does have an ability to finance the project development and, at the same time, provides a big demand for SMC’s iron ore. Since financing is not a problem anymore, SMC’s core business has changed to work more efficiently on the development of iron ore projects. A serial of change from business strategy to organizational structure have been made to meet the new situation and new requirement. Therefore, this study has explored how the SMC’s management team designed its new strategy and new structure for them to correspond to the new conditions the company works in after the acquisition. The research also examines how the change implementing process was leaded by a new Chinese Managing Director and whether the company’s leadership was effective enough as to implement the changes successfully. The impact of the change on both SMC employees and the company in general has been reviewed. Finally, the study provides some recommendations on how such changes can be implemented more effectively and what lessons other businesses c an learn from SMC’s experience? 3 Organizational Context – Sinosteel Midwest

Friday, July 26, 2019

Practicum nursing service administration Essay Example | Topics and Well Written Essays - 2500 words

Practicum nursing service administration - Essay Example ANA is a professional organization that represents interest of registered nurses in the US. The standards of professional performance by ANA describes the behavioral competency in the role of the profession in activities that commensurate with quality while providing care; education; and appraisal of performance among many others. It has its constituents that such as state nurses association and other affiliate organizations that aid in its practices. It promotes nursing profession by advocating for high level or standard practices in nursing; ensuring that the rights of nurses are catered for at the work place; and liaising with regulatory agencies and as well as the congress on issues concerning healthcare that affect the public and nurses. Nurses have an obligation to integrate ethical conducts in the different facets of their practices. There are ethical codes that guide these practices such as interpretive statements for nurses. Furthermore, the nurses in the profession have a m andate not only to establish and maintain professional therapeutic and patients and nurse relationship but also discharge health care in such a way that the patient’s dignity, autonomy and rights are upheld. They are also required to make ethical decisions while at work; report cases that are incompetent and illegal; and maintain and ensure patients on confidentiality within the boundaries of regulations and legal requirements. The sole commitment of a nurse is the patient irrespective of individuals or groups of individuals. It is a nurse responsibility to be accountable for nursing practices and evaluate ideal and correct task delegation mechanisms that are consistent with their duties to provide maximum care for the patients (ANA, 2010). The codes of ethics also stipulate that nurses have self obligations or duties which entail having the responsibility of upholding integrity and preserving safety; and

Thursday, July 25, 2019

Brexit in UK Housing Sector Essay Example | Topics and Well Written Essays - 2000 words

Brexit in UK Housing Sector - Essay Example The UK construction industry generates a whopping  £90 billion yearly. This accounts for 6.5% of GDP and 6.3% of UK jobs. In general, this market sector employs more than 2.9 million people. Despite the fact that the UK construction market is predominantly domestic in nature, Brexit will affect it since a number of people from other European nations have invested in it. Consequently, aside from the EU referendum result, potential investors in the UK need to take note of two key influences on the housing market in 2016: First, the stamp duty introduced two years earlier which saw the upfront cost of purchasing a home increase rapidly. Secondly, the introduction of a high taxes on second homes. However, eight months after the Brexit vote, UK construction industry has witnessed a significant growth in terms of construction activities. According to Kierzenkowski et al new orders flooded the month of December despite the weakening pound having driven firms’ material costs to thei r highest in half a decade. For example, a recent survey showed that purchasing managers in the construction market rose from 49.2 in August to 52.3 in September. This paints a good economic picture than many hardly expected after EU referendum. Therefore, clients should consider the following factors as they look forward to venturing into the UK construction industry. Supply refers to the connection between the cost of a good and the quantity producers are ready to make accessible for purchase in a given timeframe while other factors remain constant.

Fair Trade Brands - Secrets of the Worldwide Popularity Coursework

Fair Trade Brands - Secrets of the Worldwide Popularity - Coursework Example Fairtrade mainly exists in developing countries and it targets specific areas, for instance, the Handicrafts, Coffee Industry, Tea Industry etc, it does so in order to make sure that the workers and the producers are benefitted and their economic stature improves by participating in Fairtrade. To understand the concept better, its principles should be well understood and they are as follows: â€Å"Creating opportunities for economically disadvantaged producers, Fairtrade is a strategy for poverty alleviation and sustainable development. Its purpose is to create opportunities for producers who have been economically disadvantaged or marginalized by the conventional trading system.† The most important principle of Fairtrade is to ensure that there are ample opportunities provided to the producer, the sole aim of Fairtrade is to ensure the well being of the workers and the producers and in this process the first is to provide opportunities to the producer because only when the producer has opportunities, it can be passed on to the workers. â€Å"Transparency and accountability, Fairtrade involves transparent management and commercial relations to deal fairly and respectfully with trading partners.† Another important principle of Fairtrade is to make sure transparency exists in every activity initiated by it, in the sense that every activity initiated by Fair trade should be without any fusses and problems, fair rules and policies are followed hence ensuring the economic and financial safety of the producer. Another important principle is to make sure that the producer gets complete independence, in the sense that he/she shouldn’t have restrictions hampering their growth, it provides a very good platform for the growth of the producers and it also improves their marketing skills by giving them access to the market where they get to know so many things which they wouldn’t have learned had they not participated in Fairtrade.

Wednesday, July 24, 2019

PESTLE Analysis Google Lab Report Example | Topics and Well Written Essays - 1500 words

PESTLE Analysis Google - Lab Report Example The organization is full of young life and has been serving thousands of customers and user since its incorporation (Google, 2013a). The primary source of revenue is the online advertisements. As on 2011, the core areas on which the business focused was enterprise, operating system and platform, advertising and search. The business used its AdWords programs to promote their services and products with targeted advertising. Apart from this, the third party that included Google Network used its AdSense that delivered relevant advertisements and generated revenue (The New York Times, 2013). The study focuses on Google Inc., understands the methods followed by the company, conducts a PESTLE analysis and decides on the future performance of the organization. The Methods Google is known for its search engine. Larry Page describes a perfect search engine is one which exactly understands what the user wants and gives him back exactly that particular thing. Google has not kept itself restricte d to search engine only but has started offering products beyond that. They have shown whole lot of technological advancement staring from search to Gmail and Chrome. The goal of the organization remains the same; to assist their users easily access the things they require. Thus, the company follows a faster and smarter approach while developing its product (Google, 2013b). The huge success of the organization is based on the set of methods and beliefs that the company follows. Since the beginning of the organization they focus on providing the best experience to the users. Whatever new innovation they do, they always look towards the expectation of the users and try to fit into their requirements. At the same time when they are designing some new applications or tools they make them work so well that the user do not have to bother about the changes or think about how differently they have been designed. Google has a large pool of researchers who are extensively engaged in solving t he search problems. The company is well aware of what it does and also knows how to make it better. The company continues to make several attempts in order to solve difficult problems and has solved many complex issues. This leads to the improvement of the services that they provide and make the experience and search of the user better. The organization is fully dedicated towards developing innovative products (Google, 2013c). Google believes that time is valuable and this makes the company design their product in such ways that it takes minimum time for the customers to find what they are searching. This is the only company who aims towards making the user leave their website as soon as possible after accomplishing their objectives. This same belief is kept in mind every time the company launches their product whether it is a mobile phone application or a new browser. They understand the demand of the present moment and increasing use of mobile. Today people are seen to use mobile phones for accessing information, which has driven the company to implement new technologies and offer new products and solutions for mobile services that may help the users, present at various corners of the globe to accomplish their task. Google generates their revenue by offering search technologies to various companies and displaying advertisements on their own website and on other sites across the web. Several advertisers take advantage of AdWords to

Tuesday, July 23, 2019

Answer two questions Personal Statement Example | Topics and Well Written Essays - 250 words

Answer two questions - Personal Statement Example Amplification of signals makes them stronger than they are received2. Recent technologies also enable the changing of radio frequency that minimizes confusion of signals. An earth station sends uplinks that are received by a satellite. The satellite in turn amplifies the signal and sends downlinks that reach the earth station with minimal interruption. Positioning of the satellite and the quality of the receiver also determine if the distance between them will distort the signals. If two or more satellites are located near one another, there is a high chance  that the signals being sent to the earth might intersect and send wrong signals. The electromagnetic spectrums through which waves are transmitted are sensitive to blockages by the landscape3. If there are any landscape features blocking the spectrum, the signals might be distorted. The quality of receivers determines the accuracy in which the signal is received and interpreted4. In conclusion, distance affects the sending and receiving of signals. However, the modern technologies in signal transmission have overcome the issue. Use of amplification technology, sensitive receivers, and changing of wave frequency are solutions to overcoming the problems associated with

Monday, July 22, 2019

Social impact of ICT Essay Example for Free

Social impact of ICT Essay Industries food reduce the need for human labour. 1. e. cow, milk and bucket. When cheese gets in great demand, cant milk cows myself, so get more people. But still cant keeps up! Cant mechanise cow but can the milking! Now need admin dept to manage staff!! Paper base system to collate all orders. But now big company need technology. Man who builds machine needs more men to build more machines. Etc. Technology has both positive and negative effect. 1000s of jobs have gone because of computers. The rapid advances in computer and communication technologies have occurred during periods of considerable change in industrialized economies and although many different factors have conspired towards the generally higher levels of unemployment ICT has undoubtedly played a major role in creating new industries and jobs in general, introduction into it systems in organizations may result in: A need for staff retraining; redeployment; deskilling; regrading; redundancy; changes in job satisfaction; new job opportunities; remote/tele working; changes in career prospects. An old fashioned secretarial job required typing skills, note taking skills, filing skills, and document organizational skills. Most managers now act as their own secretary, the manager has been reskilled and she has been made redundant. There is an argument, which suggests that traditional industrial relations will have little place in the workplace of tomorrow. As we move towards the information age, the old models of labour relations with all the assembled baggage of collective bargaining between employers and workers representative bodies will become increasingly inappropriate to the new realities of work. According to this point of view, the very term industrial relations is itself a giveaway. It harks back to the industrial age, the time when the growth of large-scale production in hierarchically structured organisations led to a need for the collective regulation of employment relationships. The development of trade union organisations, for example, was predicated upon the existence of the factory system, bringing large numbers of workers together in a central workplace. What if this is no longer the way in which work is organised? What if new technologies permit a new flexibility in the way work is undertaken? For much of the twentieth century, industrial relations focused on what was seen as the normative way of working. The paradigm has been that of a full-time worker (or indeed man, since historically the assumption was that the male was the main bread-winner), working under an employment contract for one employer and remaining with their company for many years or until the time came to draw the company pension. This paradigm further was based on a clear separation between work and home spheres of life, between the hours of work and the hours of non-work and indeed also between a persons years of working and their abrupt transition into retirement. It is possible to discuss the extent to which this paradigm ever adequately reflected working life the critique has been advanced that it left out of the picture the work undertaken by women, particularly part-time and casual employment, for example. It also ignored working realities in most of the developing world. But nevertheless for most of the developed countries, this paradigm provided a basis not only for the structuring of industrial relations but also for social protection systems and retirement pension arrangements. The argument now is that, in any case, this paradigm fails to be appropriate for a network economy where value comes from the manipulation of information and knowledge much more than from the production of material goods. In the process of change, a job is becoming redefined simply as work. ATTs vice president for human resources James Meadows put it this way, in a quote attributed to him in the New York Times: People need to look at themselves as self-employed, as vendors who come to this company to sell their skills. In ATT we have to promote the concept of the whole work force being contingent, though most of our contingent workers are inside our walls. Jobs are being replaced by projects and fields of work, giving rise to a society that is increasingly jobless but not workless. 1 Many writers have engaged with this subject. Research on the growth of flexible working practices undertaken for the OECD identified a number of developments, including changes in the design of jobs, greater complexity, higher skill levels, greater use of team working and also increased delegation of responsibility to lower levels of staff. 2 Ulrich Klotz, from the German trade union IG Metall, has described changes in work organisation thus: Work is splintering into many forms As the new company models proliferate, forms of work are spreading that we still refer to as atypical: part-time work, temporary work, limited contracts, telework, contract work and other forms of (pseudo) entrepreneurial work In short, work is still with us but the stable job is not. He warns that as a consequence trade unions are in danger of losing their traditional business base. 3 ICT permits both the spatial and temporal relocation of work, challenging the idea of a discrete workplace and a discrete working day. However it would be wrong, of course, to see changes in work organisation as simply the result of technology. These changes are being driven by a number of factors. We can identify trends in management practice, including such things as the outsourcing of non-core activities and the reengineering of business processes as also contributing to workplace transformation. However, these developments are closely intertwined with developments in ICT. In an early essay, Manuel Castells suggested that there are two overarching inter-related processes at work, driving change in the workplace: the technological revolution based on microelectronics is one of these, the growing interdependence of the economic system globalisation is the other. 4 In terms of labour relations what all these changes mean, effectively, is a new implied contract between a company and a worker. The old employer/employee relationship, which offered security and reward to the individual in exchange for corporate loyalty is to go. Instead, individuals are told to take responsibility for their own working life and career, including the responsibility of ensuring that they constantly update their skills. In exchange a company undertakes to empower them in their work, by removing old-style supervisory practices and replacing these by new types of team working, based on performance management. The old master/servant basis to the employment relationship, in other words, is replaced with something more, well, modern. This sounds a seductive idea, though it blows a gaping hole in the way in which industrial relations, institutionalised in the relationship between employers representative bodies and trade unions, have traditionally been conducted. If correct, it would inevitably lead also to major changes in social and welfare protection and employment law. In the process, it would also leave todays trade union bodies cast up and redundant, rather in the way that antique steam engines, previously employed huffing and puffing their way through their working day, were left silent and fit only for scrap with the arrival of electricity. The question explored by this chapter is whether, and if so to what extent, the argument for the end of traditional industrial relations is justified. We will begin by exploring further the challenges which face the social partners, considering how the services they currently offer could be provided in other ways by other agencies. We will then investigate the state of industrial relations in one particular sector which has encountered radical change in recent years, the telecommunications industry, to see what evidence for a paradigmatic shift can be found there. We will move on to consider in some detail two examples of new work organisation (call centre working and telework) and two areas where atypical working has been growing (agency work and self-employment), to ask whether these are or are not being adequately accommodated within organised industrial relations. We will then turn to consider the degree to which the traditional industrial relations negotiating agenda has been extended by ICT. This will take us into a number of areas, including on-line rights for workers, questions of privacy and electronic surveillance and the increased relevance of copyright and intellectual property rights. We shall look at examples of how the social partners, and in particular the trade unions, are themselves making use of ICT opportunities. Finally, at the end of this journey, we shall return to the issue posed at the start of this chapter, hopefully in a better position to offer some conclusions.

Sunday, July 21, 2019

Control Of A Switched Reluctance Motor Engineering Essay

Control Of A Switched Reluctance Motor Engineering Essay The main objective of this chapter is to spot the light on the practical performance of some form of control on an actual switched reluctance motor in preference to merely theoretical method including simulation and modelling. Moreover, the design of the controller involves reducing the noise. The crucial motivation for this is to enhance new expertise, sensibly regarding circuit design and construction the use of a Programmable interface controller (PIC). A switched reluctance motor (SRM) has been appeared since the nineteenth century, but the renewal of this motor has been to discover a high-power switched device [13]. The earlier motor was facing a controversial issue in their control where the power electronic switching was very expensive and has many drawbacks. The Switched Reluctance Motor (SRM) is an electromagnetic, rotary machine in which torque is produced by the tendency of its movable part to move to a position where the inductance of the excited winding is maximized [12]. Furthermore, (SRM) has been proposed for variable speed applications [13]. In general a salient-pole synchronous machine without field excitation or permanent magnet is called a reluctance machine. From the general definition (SRM) is classified as a synchronous machine, but has different construction. These differences are both stator and rotor have salient poles. However, the stator has wound field coils but the rotor has no coils or permanent magnet. Moreover, the stator has higher number of poles or (tooth) than the rotor. While each pole in the rotor is excited by the opposite pole in the stator due to a sequence of current pulses which produce magnetic field on each stator poles. The Switched Reluctance Motor (SRM) can be more capable for variable speed than AC and DC motor. Since it is simple, robust, has a high efficiency and high power density [3, 10, 12]. Figure 1.1: two- two poles SRM [12] Over the past 30 years the power electronics growth has made the exploit of the characteristics of reluctance machines sufficiently well. Consequently, several successful products are now manufactured. The rotation of the motor depends on the angle between the rotor poles and the stator poles where the current is switched on or off to each poles in the stator where the position of the rotor is very significant. For the motoring principle example, two- two poles (SRM) where stator has two poles with two wound field coils connected in series and two poles in the rotor without magnets or windings and free to rotate as it shown in figure 1.1. If the rotor poles edge is started to be aligned, the current is switched on. Consequently, the inductance is increased and the torque in the rotor is occurred to pull the rotor in clockwise direction. The direction of the rotation is addressed by the current. The current is switched off; when the rotor poles are fully aligned with the stator poles that make the rotor free to move. However, if the current is not switched off the torque at the fully aligned is become negative that produces an attraction between the poles where the negative torque and positive torque cancel each other [12]. The ideal current waveform is therefore a series of pulses synchronized with the rising inductance intervals. The cycle of torque production associated with one current pulse is called a stroke.[12] As a result, to increase the resolution more teeth can be add to the stator and the rotor. From the instantaneous electromagnet torque equation which was derived by T.J.E.Miller(2001) [12] Te = i2/2 dL/dÃŽÂ ¸ that shows the torque is proportional to the square of the current. Therefore, the current is always unipolar. However, at the end of each stoke the voltage must be reversed to return the flux linkage to zero. The power switching IGBT, GTO and MOSFET or any other switching devices can be used in the power electronic topologies [3]. These switches are used to open and close the exiting power in the stator winding. 1.5. Applications of SRM Since the SRM has a significant characteristic operation and design which shows many advantages and makes them suitable for various applications. R.Krishnan (2001) [10] shows the wide range of applications. For example, plotter drive, air-handler motor drive, hand fork lift/ pallet truck motor drive, door actuator and washers and dryers machine, those applications are low power applications where the drives are less than 3hp. Moreover, the medium power applications range is less than 300kw such as industrial general purpose drive, train air conditioning drive and mining drive. However, the SRM did not find much attention by the manufacturers in this range of power. The high power drives are still under study for drives up to 1000hp for fan and pump applications where the converter is very competitive. The high speed applications such as screw rotary compressor drives, centrifuge for medical applications, and aerospace applications the SRM is a perfect option for them due to the small size of the rotor and high power density. Some efforts of study are in Mild Hybrid Vehicles that is reported by (Watterson, P.A. ; et al) [17] in 2008. 1.6 Research area Since the SRM has appeared and has disadvantages such as reduction of acoustic noise and torque ripple. According to the noise and vibration sources can be classified into four main categories: magnetic, mechanical, aerodynamic, and electronic. The classification was done by R.Krishnan (2001) [10] as it shows in figure 1.2. Most researches are based on the design of the motor or in the controller to improve the motor performers and reduce the noise. Iqbal Husain (1994) [8] discusses the effect of the high ripple toque which causes vibration and acoustic noise. The case was in driving SRM for low speed and high performance applications by a new PWM strategy current control. The method was based on optimum profiling of the phase current during an extended overlapping conduction period of two phases. The result shows a smooth operation with minimum torque pulsations by controlling the current profiling. Moreover, other studies were in magnetic radial force as M. N. Anwar (2000) [1] show s the lower noise is occurred when the dominant mode frequencies is high. As a result the research has experimented a proposed design considerations to a 4-phase, 8/6 (1-repetition) and a 3-phase, 12/8 (2-repetition) 1.0 kW SRM with low acoustic noise requirement. The results of the proposal design shows that the noise level has been reduced; however, a 3-phase SRM is noisier than a 4-phase SRM. There are other research was on reducing the noise by Adding extra winding to the phase winding to reduce magnetic stress during commutations with Two stage power converter. Adding extra winding to the phase winding in 6/4 SRM with Two stage power converter shows a significant improvement in the efficiency and reduce in the vibration and noise [16]. The electronic sources of noise occur by reason of the harmonics of voltage and current. The significant research is reported by (Lecointe J.P; et al) in (2004) [11]. The research was in adding an auxiliary winding to the model of a BDFRM (brus hless doubly-fed reluctance machine) to shows that the additional winding has a benefit in reducing the noise in SRMs where a specially derived current is injected to create a suppression force. The BDFRM is used to analyse the equivalent circuit where the equivalent circuit of the model is similar to SRM. However, the process still needs to be complete using two current sources. Figure 1.2: sources of noise in electrical machines [10] Advantages and disadvantages of 3 basic power electronic circuits There are many power electronic topologies that is used for SRM depends on the machine phase configurations. R. Krishnan (2001) [10], figure 1.3, has classified the power converters for switched reluctance machines. The simple three topologies are: Figure 1.3: Classification of power converters for SRM [10] 1.7.1. Single-Switch-per-Phase Circuits (Split dc supply converter) The basic operation of this topology, figure 1.4, is to split the reverse dc power supply into two capacitors. The phase voltage is half the dc voltage when the switch is on and negative half voltage when the switch is off. Consequently, this configuration is a disadvantage. Moreover, the maximum speed and the output power are half the rated while the current and the voltage are half. This topology is only used for low-cost application due to the high power losses. However, the advantages of this topology are: simple and less cost. [3, 10] Figure 1.4: Single-Switch-per-Phase Circuits (Split dc supply converter) [10] 1.7.2. Single-Switch-per-Phase Circuits (Bifilar type) The basic operation of this topology uses a bifilar winding, figure 1.5, with the motor winding to regenerate the stored energy to the supply that the phase winding is connected in series with the switch, and the diode is connected in series with the bifilar winding. The reflected energy is an advantage for this topology in some applications, where the transistor voltage is much higher than the supply voltage. However, the cost increases as the extra winding is added to the motor and the complex design of the power electronic. Moreover, the power density of the motor reduces because of the bifilar winding. [3,10] Figure 1.5: Single-Switch-per-Phase Circuits (Bifilar type) [10] 1.7.3. Two-switch/phase Asymmetric Bridge Converter From the half bridge topology that is illustrated in figure 1.6. if both Q1 and Q2 are turned on the apply voltage at the winding is equal to the supply voltage. However, if both Q1 and Q2 are turned off the apply voltage at the winding is equal to a negative supply voltage where D1 and D2 to avoid the freewheel currents. The advantages of this topology that it can give a negative voltage to reduce the torque ripple refer to noise for a high performance SRM drive system and it can be used for generator or motor operations. The disadvantages more control is needed, more fault in the switching [3, 10, 12]. Figure 1.6: Two Switched / Phase Asymmetric Bridge Converter [12] 1.8 Speed and Position Controller The switched-reluctance motor is basic control system form of a torque-controlled drive as compared in performance to a D.C motor (separately-excited). Commonly, controlled speed or even position is the most requirements. The SR motors speed increases if torque is still produced. As the D.C. drive the torque of SR motor controller is included within a speed regulating loop. The rotor position sensor, which is the encoder, is used as a feedback to derive the speed of the motor readily as it shown in figure 1.7. From the figure it can be seen that an additional feedback is introduced to achieve the position control of the SRM [3]. Figure 1. 7: basic speed and position controller for SRM [3] Aims and Objectives The aims of the project are to design, build and test a power electronic circuit for Switched Reluctance motor (SRM) using Bifilar type. The objectives are as following: Understand the operation of two- two poles SRM to realise the behavior of the motor and their characteristic. We can know from their characteristic how to make the motor spin and the control techniques that is used for them. Select and Design Power Electronic Circuit can help to active a high efficiency, low noise and low cost. Test Power Electronic Circuit with Resistive Load: to find the advantages and disadvantages of the circuit when the resistive load is applied to the motor. Design, Build and Test current limiting circuit where the current limitation can achieve low torque rebel. From the low torque rebel the noise can be decrease. Rotate motor using direct feedback where the position of the rotor is important to detect the moment of switching on and off. Study and understand PIC 18F 46K20. Program PIC to control SR Motor by designing a simulation using the MATLAB or other programmes. Chapter 2 Choosing power electronic component 2. Overview Over the time motor control has a significant growth in the industrial control where digital signal processors together with external hardware and appropriate software are used widely. In order to control the motor the switching device should switch on and off according to the position of the motor rotor and the apply current to the stator winding. The aim of this chapter is to highlight the details of the components that were used in the controller design. 2.1 Technical operation of Simple SRM The simple SRM has 2 poles in the stator and 2 poles in the rotor, figure 1 which the stator iron core has square shape with two winding in the upper side opposite the poles. Both stator and rotor are salient poles where the free spinning rotor is placed between the stator poles. In order to spin the rotor, stator poles are energised by the winding when the rotor poles are unaligned with stator poles. The inductance increased and the torque is produced as the rotor approaches the aligned. At this point the stator winding is demagnetised allows the rotor free to spin. The time of the energised and de-energised of the motor windings depend on the rotor speed. Figure 2.1: (a) Simple SRM 2/2 poles with bifilar winding[12] 2.3 Winding connections The motor has a bifilar winding to build up the current in the stator quickly, figure 1, which facilitates the higher torque and magnetic flux densities occurring. As a result the stored energy regenerated to the supply that the phase winding is connected in series with the switch device. This leaded to three achievable connections, figure 2, for bifilar winding. Figure 2.2: Possible winding connections The first connection shows the parallel connection that has a resistance connected in parallel to the motor windings to reduce the power losses when the switch is off. This connection has the main disadvantage due to the high loss. The second connection shows series connection that two switching devises are used which increase the cost of the design. However, this topology is the most common one for SRM according to reduce the switching heat losses, protections and their control flexibility that is handling the phase current and the machines acoustic noise. The third connection is the most cost effective and easier to control for the simple SRM figure 2. Moreover, it is offering the zero voltage supply as a reference for all power switching that make it suitable for low- voltage systems. Simply this configuration operates as it shows in figure 2.3, When the current of phase-A is turned off by removing the base drive signal to T1, the induced EMF in the winding is of such polarity that D1 is forward biased. This leads to the circulation of current through D1, the bifilar secondary winding, and the source, thus transferring energy from the machine winding to the source. The various timing waveforms of the circuit are shown in Figure 2.3. During current turn-off, the applied voltage across the bifilar secondary winding is equal to the dc link voltage. The voltage reflected into the main winding is dependent upon the turns ratio of the windings. Considering the turns ratio between the main winding in series with the power switch and the aux iliary winding in series with the diode as a, the voltage across the power switch is VT 1 = Vdc + aVdc =(1 + a)Vdc This shows that the voltage across T1 can be very much greater than the source voltage. One switch per phase comes with a voltage penalty on the switch. The volt ampere (VA) capability of the switch will not be very different for one switch compared to two switches per phase circuit. [10] Figure 2.3: (a) Converter for an SRM with bifilar windings; (b) operational waveforms of bifilar converter. [10] Thus, Figure 4 shows the primary plan for designing the current limiting circuit for the third connection of SRM and each block are explained next. Figure 2.4 basic configurations for current limiting 2.4. Power switching component Nowadays semiconductor and electronic switching devices offer a significant performance to control the electrical motors. Moreover, their size and cost make them more convenient to use in the motor control. The electronic devices has a significant role to control SRM where the switching on and off for the voltage is the major role to control the SRM with high performance. As a result, the main electronic devices that can be used are field effect transistors. There are two types of the field-effect transistor J-FET and MOSFET (see the appendix figure 3) [4]. The MOSFET has taken a widely role as a best choice to the simple SRM for many reasons that is discussed later in this chapter. 2.4.1 N-channel power MOSFET (STP36NF06) Simply the MOSFET is a metal-oxide-semiconductor field effect transistor where the MSFET has a significant characteristic [2]. The characteristic of N-channel MOSFET shows a significant use in switching. The structures of the MOSFET are shown in figure 5 where the MOSFET consist of Si P material substrate, two N material substrate that one is the source and the other is drain, and between them there is an insulator Sio2 and at the top metal conductor which is known as a gate. The length (L) below the gate and between the source and the drain is known as a channel. Fundamentally, the MOSFET output current is proportional to the charge in the semiconductor material by the control electrode[15]. Figure 5 MSFET structures [6] The MOSFET is used as a switching device to provide a high speed switching. The significant advantages of the field-effect transistor are: Higher operation temperature. Lower switching leakage. High input impedance. Low noise. Lower power dissipation during switching. In addition, The N-channel MOSFET has advantages such as ease to use for high frequency switching and simpler to control where the MOSFET gate drive do not require a continuous current to switch ON. When the MOSFET is needed to switch ON positive threshold voltage is needed to apply to the gate drive and Zero current to completely switch off. Moreover, the N-channel MOSFET has higher density integration and possible in rapid reduction in capacitances. [2]. MOSFET (STP36NF06) gate requires drive properly the later components are used to limit the current and the gate signal for the MOSFET. The gate drive is a power amplifier that accepts a low power input from a controller devices and generate the appropriate high current gate drive for a power MOSFET[4]. 2.5. Bipolar junction Transistor Transistors are considered one of the main elements of semiconductors that have been discovered in modern times. Transistors are used in the amplifiers of electrical signals and electronic switching, which have helped a number of factors such as small size, ease in manufacturing, cost effective and consume less power to extend significantly. Figure 2.6 (a) transistor structures (b) npn and pnp structures 2.5.1. ZTX 653 NPN transistor The NPN transistor is a type of bipolar transistors known as a medium power transistor. The NPN ZTX 653 transistor has interesting features that make it suitable for the push pull topology and amplifier topology (pre totem pole connections). The features of NPN ZTX 653 transistor are [6] * 100 Volt VCEO * 2 Amp continuous current * Low saturation voltage * Ptot=1 Watt 5.5.2. ZTX 753 PNP transistor The PNP transistor is another type of bipolar transistors that is used in the push pull topology. The PNP ZTX 753 transistor is suitable to employ in the push pull topology (Totem Pole) according to their features. Their features are [6] * 100 Volt VCEO * 2 Amp continuous current * Low saturation voltage * Ptot=1 Watt Figure 2.7: npn and pnp characters 2.5.3 Gate drivers (Totem Pole) This type of connection is known as a discrete drivers or push pull drives which is in common use today. Figure 2.8 shows the complimentary arrangement pair bipolar NPN and PNP emitter configuration. Moreover, the N-channel and P-channel MOSFT can be employing for totem pole connection. However, the N-channel and P-channel MOSFT driver suffers from shoot through current, caused by the threshold voltage overlap during ON and OFF transitions, resulting in increased drive power requirements [9]. Figure 2.8: push pull configuration The bipolar Totem Pole, figure 2.8, is non-inverting and offers no voltage gain to improve the pre-driver rise or fall times. It does provide current gain to reduce the driver impedance to speed the charge and discharge of the device capacitances. Once the input capacitances are charged and the power device has been switched, the driver does not require holding current. It has medium speed and does not perform well at higher conversion frequencies [9]. This circuit uses a complementary pair of transistors similar betas and power rating one is an npn power Darlington, and the other is a pnp power Darlington. When a high voltage (e.g., +15 V) is applied to the input, the upper transistor (npn) conducts, allowing current to pass from the positive supply through the motor and into ground. If a low voltage (0 V) is applied to the input, the lower transistor (pnp) conducts, allowing current to pass through the MOSFET gate from ground into the negative supply terminal.[14] 2.5.4. Common emitter amplifier (inverter) This configuration is a simple electronic circuit that is used to boost and invert the low signal. Figure 2.9 shows the circuit that contain a high resistance value with NPN transistor. The low signal is switch on and off the transistor where the resistance is limiting the current that apply to the transistor. This topology is used to boost and invert the output of signal processing unit to appropriate the signal that can switch the MOSFET as it will be discussed in the following point. Figure 2.9 common emitter configuration 2.6. Current control and limiting The winding current is controlled inorder to be not more than 8A. When the MOSFET is switched ON without any current limiting circuit, the current shoots up without any control. As a result, the technique for current limiting is arranged as follows When the winding current is less than 8A the MOSFET switches ON. When the winding current is exceeds 8A the MOSFET switches OFF. Therefore for appropriate current control, square wave signal is applied to the gate of the MOSFET. The frequency of input signal at the gate of the MOSFET is take into account to make the MOSFET switch properly with regard to the above current control arrangement. In order to do that feedback from the source of the MOSFET is carried to non-inverting terminal of the comparator. Figure 10 shows the operational waveform of the MOSFET. It can be seen that, the MOSFET needs to switch off when the voltage at inverting input of the comparator reaches 0.8V and switch on when the voltage is zero. Moreover, the reference voltage is 0.8 volt from the voltage divider law when a 0.1ÃŽÂ © resistance is connected to the source of the MOSFET. The 555 timer can offer the control of MOSFETs switching frequency. Figure 2.10: the expected waveforms from the design. 2.6.1 Timer NE555P The 555 timer IC is an incredibly useful precision timer that can act as either a timer or an oscillator. In timer mode is known as monostable mode the 555 simply acts as a one-shot timer; when a trigger voltage is applied to its trigger lead, the chips output goes from low to high for a duration set by an external RC circuit. In oscillator mode is known as astable mode the 555 acts as a rectangular-wave generator whose output waveform (low duration, high duration, frequency, etc.) can be adjusted by means of two external RC charge/discharge circuits.[14] In this project the monstable circuit is highlighted due to it has one stable state. Figure 2.11 (a) monostable configuration of timer 555 (b) monostable operations[14] In the monostable configuration, figure 2.11(before a trigger pulse is applied) the 555s output is low, while the discharge transistor in on, shorting pin 7 to ground and keeping C discharged. Also, pin 2 is normally held high by the 10-k pull-up resistor. Now, when a negative-going trigger pulse (less than 1à ¢Ã‚ Ã¢â‚¬Å¾3VCC) is applied to pin 2, comparator 2 is forced high, which sets the flip-flops Q_ to low, making the output high (due to the inverting buffer), while turning off the discharge transistor. This allows C to charge up via R1 from 0 V toward VCC. However, when the voltage across the capacitor reaches 2à ¢Ã‚ Ã¢â‚¬Å¾3VCC, comparator 1s output goes high, resetting the flip-flop and making the output low, while turning on the discharge transistor, allowing the capacitor to quickly discharge toward 0 V. The output will be held in this stable state (low) until another trigger is applied [14]. According to the operation of the monstable the pulse width can be modified by changing the value of R1 and C. T= 1.11 R1C Thus, to obtain capable functioning of the circuit the variable resistance R1 with a maximum value 100KÃŽÂ © and the threshold capacitance C value is 100nf are chosen. The timer input is the output of the comparator where the two values of the voltage are compared to make the output of the timer based on these two values. The two voltages are one is 5V and the other is the feedback from the MOSFETs source. 2.6.2. (LM393) Comparator The comparator is used to compare the voltage between the source voltage and the feedback from the MOSFET. This is important to control the current by triggering the timer to limit the current as it is mentioned before. LM393 has several advantages for timer input which are Higher accuracy in comparators. High voltage range (2.0V to 36V) Biasing with lower input current. Lower input offset current  ±5 nA Figure 2.12 LM393 connections to the circuit In order to establish the reference voltage variable resistance is required in the voltage dividers law. The operation of the comparator is simply as follows If IN+ > IN- the comparator output = V8. If IN+ From the previous operation it can be seen that the comparator send the signal to trigger the input of the timer and the timer acts upon the applied signal therefore the MOSFET switches on and off with regard to the timer output. However, the output of the timer switches on the MOSFET when the current is high which will be disastrous to the motor. To avoid this not to happen, a design of logic gates are incorporated in the current limiting topology of the SRM. 2.6. 3. Logic gate design (SN74LS00N) Logic gate is designed according to the output of the timer which gives the positive pulses when the current exceeds to 8A and no pulse when the current is less than 8A. With the purpose of switch (totem pole) the gate of the MOSFET turns on and off at required instants of time using an external Drive Signal. Figure 2.13 shows the technique of the combination between the Drive Signal and the timer output to control the MOSFET. SN74LS00N has four NAND gates that can be used to reduce the number of ICs in PCB connection. The logic gate is connected to the timer output which will be inverted with a common emitter configuration to switch on the MOSFET when the timer output is low (Itimer Figure 2.13: (a) SN74LS00N chip (b) logic circuit connection (c) NAND gate logic signal. The MOSFET behaviour that is need according to the timer output is shown in table 1. To do that the NOT gate, OR gate and AND gate are needed before the pre totem pole connections (common ammeter topology). Current condition Timer(A) Drive Signal(B) Output of the logic gate (C) MOSFET gate signal (Output after totem pole) I > 8A MOSFET must be off 1 0 1 0 1 1 1 0 I MOSFET can be on 0 0 1 0 0 1 0 1 Table 2.1 digital signal behaviour Boolean algebra From the logic gate output we can get the function: (1) This function can be simplified (2) Figure 2.14 (a) logic gate from equation 2 (b) table shows the equavelant NAND gates [7](c) the final simblified gates using the table (b) 2.7 Curant limiting circuit simulation Curent limiting circuit ,figure 2.15 , is the simulation circuit and the combination of each part that discussed previously. Figure 2.15: current limiting circuit

Causes of Concrete Failure

Causes of Concrete Failure Concrete and steel are materials commonly used in building construction. Concrete is formed by mixture of aggregates which are sand and stone, and bonded together by water and cement with the proper ratio of 1:2:4 or 1:3:6 which is commonly used. Steel is a material that is manufactured under carefully controlled condition by which its properties are determined in a laboratory. Combining concrete and steel gives increased strength to resist heavy loads to increase the lifetime of the structure. Even though concrete and steel give many advantages on building, they can also cause failure to the structure thru the impropriate procedure work, and lacks of efficient control and monitoring mechanism (A.M. Neville, 2002),which happen to the concrete column at the building of University of Technology Mara (Ismail M, 2005). The list of previous dissertation topics by building surveying students shows that there has never been a study or research done on concrete failure in the Industrial Zone. Due to the importance of awareness and understanding of concrete failure, the dissertation topic on The Causes Effects of Concrete Failure on Residential Building Surrounding Industrial Zone is chosen for research and case study. The idea on this topic also came when conducting condition survey on the Shah Alam Commercial building where it is important to understand the effects of the emissions produced from industrial area to the concrete structures in order to prevent concrete failure. The aim of dissertation is to give an insight on the causes of the defects, share what measures are taken by the building authority to prevent it and to find the result on the majority causes of the failure and its effect in real case study. The objectives of dissertations are: To study the causes and effects of concrete failure to the building structure To investigate and study the causes and effects of concrete failure of the real life cases i.e buildings in the industrial areas To come up with recommendations to prevent or minimise the concrete failure The scopes of the dissertation are: Literature review on concrete, type of cement and causes of the concrete failure. Case study on the affected residential buildings surrounding industrial zone at section 25 Shah Alam, Klang Valley, and Petaling Jaya. Produce questionnaire and conduct interviews with the contractors, clients, consultant or building maintenance personnel. Analysis of the results based on site observations, reports and interviews To give recommendations based on the result to prevent or minimise the concrete failure on structure. Below shows the procedures to reach the goal for my dissertation. RESEARCH METHODOLOGY CASE STUDY FINDINGS ANALYSIS RESULT (Goal) RECOMMENDATION The dissertation consists of 6 chapters. The dissertation starts with the introduction of the project which includes scopes, objective, and the aims of the project which are stated as chapter 1. Chapter 2 is a literature review on concrete. This includes description on the history of concrete and cement, different types of cement, sources and causes of concrete failure and the main theories of the concrete failure. Chapter 3 discusses the analysis and results of the interviews and questionnaires on concrete failure. The experiences of the relevant people interviewed will be shared in this chapter. Chapter 4 gives the detailed report of the case study including the site condition surveying results which consists of the study of building condition. The investigation and site observation on the causes and sources of defects and the remedies will be discussed. The analysis of the findings and the results of the case study will be captured in chapter 5 which include graphs and discussions. Based on the results, the effectiveness of the remedies will be evaluated in this chapter. The last chapter will conclude the case study and gives recommendations which includes the procedures on preparation and designing a building. Literature Review Introduction There are several impact which carried to the failure of the building. Basicly, failure to the structure such as piling, foundation, ground soil and etc which end up to the disaster or collapsion to the building where blamed appointed to the engineer in-charge and question that unable to explained. In the end, discussion for solving the problem is issue which has proven to the collapsion of Pulbic Work Department at Petaling Jaya (Star Biz, 2009). Therefore, the problems to the concrete which causes by human error during development procedure can be classified as four (4) categories as follow(Zarina Isnin, 2010) :- Design deficiencies Construction error Material defect Maintenance deficiencies However, the purposed of the study is only concerned on the causes and effects to the concrete failures without any concerning specific on the structure ability. Literature review on this chapter which started with the description on the history of concrete and cement and follow by the classification of cement. The objectives of this chapter is to explained the behaviour of the concrete such as sources of failures and its effects based on the facts of previous study and research. History of Concrete and Cement. In around 2,500 BC, Pyramids was the first recorded structure to used cement. The ancient Egyptian constructed Pyramid by mixing mud with straw to bind dried bricks and by adding gypsum cement and lime.Then, the Greek and the Roman found that by adding lime and water, sand and crushed stone or brick and broken tiles, its produce compressional strength and created the first structural material known as concrete. The Pantheon in Rome, was recorded the first structure used concrete mixture and proven of the success of Roman invention which still standing until today. In 1756, concrete was modernise by the British engineer, John Smeaton by mixing powered brick into the cement and adding pebbles as a coarse aggregate. In 1824, Portland Cement was invented by the english inventor, Joseph Aspdin by burning ground limestone and clay together which change the chemical properties of the materials and produce high quality of cement. It became the first true artificial cement ever produce and re mained its production until today. 20 years later, the parisian inventor, Joseph Monier invented reinforce concrete, which are the combination of concrete and steel which produce the tensile or bendable strength of metal and the compressional strength of concrete to withstand heavy loads (C.L. Page And M.M. Page, 2007). Classification of Cement Cement are categorise as two (2) categories which are Hydraulic Cement and High Alumina Cement. Hydraulic Cement is the cement that set and hardened under chemical reaction. Its can be classified into Natural Cement, Aluminious Cement and Portland Cement. The most used or well known is the Portland Cement (PC) which is high demand in market that are used in the construction and building industries or use as solution to problems for engineer. By changing or reducing or increasing the chemical properties of the compenent can produces another different types of PC and different purposed in construction industry (V.S. Ramachandran, 1984). However, theirs several types of PC are used in malaysia construction industry. Ordinary Portland Cement (OPC) at figure 2.3 (a) is the most important type of cement which commonly used in construction and building industries which can be purchase at the local building supply store. The OPC was classified into three grades, namely 33 grade, 43 grade and53 grade depending upon the strength of the cement at 28 days when tested as per IS 4031-1988. But the actual strength obtained by these cements at the factory are much higher than the specifications. In the other hand, the production of Rapid Hardening Portland Cement (RHPC) at figure 2.3 (b) is similar to Ordinary Portland Cement (ORC). This cement develops its strength rapidly which give advantages in construction industry where its development at the age of three (3) days, which give the same strength of seven (7) days development to ORC. Although, the RHPC set its development in short period, it is not known as Quick-Setting Portl and Cement (QSPC), but it is well known as High Early Strength Cement because of its development product. The RHPC are widely used in construction industry as Industrial Building System compenent such as prefabricated concrete construction where the formwork is required to be removed in early stage for other use. In other purpose of RHPC are used for road repair works, and in cold weather concrete where the rapid rate of development of strength reduces the vulnerability of concrete to the frost damage (Dr. Hanizah A.H, 1997). Fact showing that OPC is low resistance of the attack of sulphates which produces in ground soil and other particular action. Sulphate Resisting Portland Cement (SRPC) at figure 2.3 (c) give protection to the concrete from chemical attack. Therefore, it is high demand cement which hardly found at the local store rather then OPC. Their normally used at the high concentration of sulphate such as at marine condition area, in foundation and basement, fabrication of pipes which likely buried in sulphate bearing soils, and in sewage treatment or repairs works. Sulphate attack occur during the frame work of hardened cement paste which results the expansion on the paste and produce defect such cracks and subsequent disruption. Attack of the Sulphate is greatly accelerate by alternate wetting and drying which normally takes place before and after the building development which result in the future (Dr. Hanizah A.H, 1997). Quick Setting Portland Cement (QSPC) at figure 2.3 (d) indicates sets very early where setting of property is brought out by reducing the gypsum content at the time of clinker grinding. It is required to be mixed, placed and compacted at early stage and mostly used under water construction and repair work where pumping is involved which has been use during the construction of smart tunnel in Kuala Lumpur, Malaysia figure 2.3 (f). Use of QSPC in such conditions reduces the pumping time and makes it economical. QSPC may also find its use in some typical grouting operations. For manufacturing various Colored Portland Cements (CPC) at figure 2.3 (e), either white cement or grey Portland cement is used as a base because of white cement is costly. Basicly, the CPC is generally use as decorative work and its production is from mixing several percentages of pigment with portland cement which form to grey or red or brown (Dr. Hanizah A.H, 1997). Theories about concrete failure Knowledge and understanding the behaviour of the concrete or in other words Durability of Concrete are most important to the engineer or developer to prevent the concrete fail to serve its purpose as durable material. Durability of concrete is defined as its resistance to deteriorating influences which may through inadvertence or ignorance reside in the concrete itself, or which are inherent in the environment to which it is exposed.(Wood H, 1968). Previous study, proved that their are several theories causing the concrete to reduce its strength and its capability which can be either external or internal factor. The behaviour can be either physical, chemical, or mechanical which can damaged the concrete indirect or direct processes (A.M Neville, 2002). Therefore, the physical theory which causes the concrete loss its performanance which either by the effect of the high temperature or differences in thermal expansion of aggregates. Infact, the alternating freezing and thawing of concrete and the associated action of de-icing salt are the combination of physical and chemical processes which likely as contraction and expansion process where normally takes long periods of time to give its result. However, the chemical process normally take places at external area where the chemical attack mainly from the aggressive ions likely as chlorides, sulphates, or carbon dioxide, which mainly produces by the natural or industrial. Other theory was the mechanical process which either made by the abrasion, erosion, cavitation or loads impact (A.M. Neville, 1995). But however, sources of the concrete failure can be considers into two (2) factors (C.L. Page And M.M. Page, 2007):- The environment factors The production factors. The Environmental factors The environment is one of the sources which something that cannot be controlled by human or in other words known as the act of God. Therefore, these factors can be categorise as (Edward A. Noy, 2005) :- Abrasion and Erosion, Climatic Condition, Atmospheric Pollution, Biological Attack, and Chemical Attack. Abrasion and Erosion Abrasion is the running surface or namely as landslide that cause by rain which are either direct or indirect fall to the unprotected surfaces which happen on high land area. However, the definition for the erosion is commonly similar with abrasion but different in process where it occur on force motion. Therefore, these two factors can occur either by human action or forces of nature (Edward A. Noy, 2005). Climatic Condition Commonly, the most effected surface on concrete are at the exterior area on building. Therefore, the design of the concrete at exterior area must be able to withstand the conditions that produced such as the weather or temperature changes, both daily and seasonal. The processes normally end up with cracking and spalling that may cause by expansion and contraction where the process takes long period of time to produce its result(Edward A. Noy, 2005). Atmospheric Pollution Atmospheric Pollution is one of the environment source which is not a new problem where the prevention was made since King Edward II of England in 12 century until today. Therefore, world new era of technology for economical purposed which made rapid growth of industrialized buildings for instance, factories where developed without realizing the impact to the environment such as emission of acidic and alkaline agents into atmosphere that is pollutant. These two compenent can cause failures to concrete where the aggressive reaction of both agents can overtake the compenent of the concrete which result in reducing the value of the concrete and causing corrosion problem in reinforced concrete bar. These problem not only effected the failures to concrete, but its also effected the human health which can cause illness, athsma, running nose, red eyes, and also can cause death (Harris,Samuel Y, 2005). Biological Attack Generally, every building will produce this type of problem which result in the growth of algae, fungi and bacteria to the concrete. These cause by the temperature different between internal and external of building where the temperature meet at dew-point and produce moisture to the concrete which to the growth that be solve by maintenance or temperture controlled (Edward A. Noy, 2005). Chemical Attack Chemical attack is the source that made the failures to concrete where the process involve the changing of the concrete compenent either by adding or increasing or reducing its compenent. The chemical attack which produce by rain and ground soil are carried acids and sulphate compenent. Chemical attack normally react during development where reaction of acids and soft water with the hardened cement, reaction of sulphates with aluminates in concrete, and reaction of alkalis with reactive aggregates in concrete (Ransom W.H, 1981). The Production Factors The production factor is involvement of human to controlled the concrete quality. To produce quality concrete, it can be categories as followed (Edward A. Noy, 2005):- Type of cement Type of aggregates Degree of compaction Water / Cement ratio. Type of Cement At chapter 2.3 are the several types of cement and its charactistic which are use in malaysia. The proper choice of cement use is important to produces concrete to protect its compenent from overtake by other deficiencies. However, by accurate measurement or calculation, can help the concrete to serve its ability without concerning its maintenance. Table 2.1 below show the measurement or calculation of cement which has been done by previous study (Edward A. Noy, 2005). Type of Aggregates Researcher proven that durable concrete can produced by good quality aggregates that are clean and free from impurities. Aggregates is used to decribe the gravel, crushed stones and the other materials which are mixed with cement water to make concrete. These can be classify as High Density aggregates, Normal aggregates and Light Weight aggregates. High-Density aggregate are classified as high specific gravity which are likely required in exceptional circumstances. However, Normal Density Aggregate specificed gravity between about 2.5 and 3.0 such as crushed rock, sand and gravel and broken bricks which happened in natural (Concrete Society, 1989). For the Light Weight Aggregate are the partical density or dry loose bulk density of less than 2000 kg/m3. Therefore, materials which can be considers as light weight aggregate are pumice, foamed lava, volcanic tuff and porous limestone which happened naturally. However, materials required processing which occurs naturally such as expanded clay, shale and slate are also consider as light weight aggregate. Other material which still consider as ligth aggregates such as sintered pulverised fuel ash (fly ash) aintered slate and colliery waste, foamed or expanded blast furnace slag that produce from industrial (Edward A. Noy, 2005). Degree of compaction Compaction or Vibration to the mixing concrete before drying process in progress are very important to prevent the failure not only to the concrete which also to the structure. The purposed of these method are to reduce the air which trapped during placing the concrete and to prevention of honeycomb on the concrete surfaces. Air contained inside concrete is about 5% every 75mm slumped and concrete with a 25mm slump may contain as much as 20%. If fully compaction or proper vibration procedure is made, concrete can result in strong, impermeable and durable otherwise, durability will be drastically reduced due to air voids in the concrete. As calculation was made, every 1% air contain in the concrete can reduce more than 5% loss of strength to the concrete and also reducing the bonding between concrete and reinforcement (A.M Neville, 2002). Water/Cement ratio As the engineering done the practice on the workability which are commonly conducted before applying it to the building as it compenent. One of the workability factor was water cement ratio which proven the most improtant part in producing quality concrete. Mixing of concrete should be applyed with lowest w/c ratio as possible and tested with compaction methods as mention previously inorder to produces durable and ability concrete. In engineering researches in german labratory, the practicles of the ratio give different spaces. The higher w/c ratio give more workability to the concrete compared to the lowest w/c ratio. Although, the high w/c ratio gives advantage on workability but it can reduce the concrete ability and effecting the hardening process at the early stage which can produce deficiencies to the concrete in the future. Therefore, figure 2.5 shows the differences spacing between cement practicles in different w/c ratio. Defect on Concrete As mention before, the sources of the concrete failure are from the environment factor and the production factor that been described at 2.4 and 2.5. The effects of these factor gives defect to concrete which are majority resulting in cracks. Some of the defects can be identified immediately and some cannot be recognised. As building surveyor, recognising defect and decision making on the problems are difficult part mostly to unidentify defect or unexplainable problems. Some of the solving method can be costly such as defect occured on foundation which effecting the structure compared to the defect occur to the concrete which can be easily done by owner himself. Figure 2.6 shows the identification of typical types of cracking to concrete surfaces which cause by this factors which has been study before. Deformation of the Surface Three defects cause deformation of the concrete surface, but may not exhibit any other symptoms. The first is curling or warping. This is the deformation of the edges and corners of a slab-on-ground in the absence of any loads. When caused by moisture, this deformation is called warping; when caused by temperature, it is called curling. The second defect is the delamination of surface mortar from underlying concrete. It is difficult to visually observe a delamination before it becomes dislodged from the surface. However, in small discrete locations, the surface may exhibit convex rising called blistering. Blisters are generally isolated, but may be closely spaced and can combine to form a large blister or delamination. A third defect occurs when isolated low spots on the surface collect water and have no means of drainage. These surface water pools are known as birdbaths. Cracking of the Surface Cracks appear in concrete for many reasons. Some cracks can appear as secondary symptoms of other defects, such as a long rounded crack following the structural failure of a warped slab. Discussed here are cracks that are primary symptoms of distress, caused by volume changes and structural failure. Shrinkage cracks have many different looks and can be e difficult to distinguish from cracks caused by other mechanisms. Discreet, parallel cracks that look like tearing of the surface are caused by shrinkage while the concrete is still fresh, called plastic shrinkage. Fine random cracks or fissures that may only be seen when the concrete is drying after being moistened are called crazing. This defect may also become evident when a translucent coating is applied to the concrete surface. Cracking that occurs in a three-point pattern is generally caused by drying shrinkage. Large pattern cracking, called map-cracking, can be caused by alkali-silica reaction within the concrete. Structural failure cracking may look like many other types of cracking; however, in slabs they are often associated with subsequent elevation changes, where one side of the crack is be lower than the other. Disintegration of the Surface Disintegration of the surface is generally caused by three types of distress. When laitance forms on the surface, it is called dusting. This can be caused by a number of reasons, which include carbonation of the surface by unventilated heaters or by applying water during finishing. Raveling or spalling at joints occurs when aggregates or pieces of concrete from the joint edges are dislodged. The last form of disintegration is the breaking of pieces from the surface of the concrete generally caused by delaminations and blistering. Popouts are conical fragments that come off the surface, typically leaving a broken aggregate at the bottom of the hole. Popoffs, or mortar flaking, is similar to popouts, except that the aggregate is not broken and the broken piece is generally smaller. Flaking of the concrete surface over a widespread area is called scaling. Types of cracks Popoffs, or mortar flaking, is similar to popouts, except that the aggregate is not broken and the broken piece is generally smaller. Flaking of the concrete surface over a widespread area is called scaling.

Saturday, July 20, 2019

Women play victims in Thomas Hardy’s short stories, roles that were Ess

Women play victims in Thomas Hardy’s short stories, roles that were typical of Victorian women in general â€Å"Women play victims in Thomas Hardy’s short stories, roles that were typical of Victorian women in general† Discuss with references at least three of Hardy’s short stories Thomas Hardy in his short stories â€Å"The Withered Arm†, â€Å"Tony Kytes, the Arch Deceiver† and the Winters and the Palmleys† presents his readers with a series of unsettling visions of the relations between men and women, women mainly coming worse off. For example Rhoda of â€Å"The Withered Arm†, the poor outcast milkmaid, not even respected by her own son, or pretty Harriet Palmley, the wolf in sheep’s clothing, evil due to her education, therefore not a victim, but instead a horrible person. Gertrude also, a good, obedient, â€Å"rosy cheeked titsy-totsy little body enough† until she gets her arm withered from a curse that drives her to desperation to find a cure for the â€Å"disfigurement†. All these women, due to the fact that they’re female, all ended off worse off and in the course of this essay I am going to analyse whether his female characters were victims or merely women of their time. Hardy’s stories, mainly set 50 years before they were written, are set mostly in the 1830’s period of Victorian Britain, when women were considered lower than men and didn’t usually get any rights or education, especially in the rural areas such as Wessex, where Hardy's â€Å"Wessex Tales† where set. Women were also oppressed in the way of not being allowed high place jobs, the vote and certainly not a place in Parliament or anything that might change Britain in any way, which was quite ironic considering Britain was being ruled by Queen Victoria, a women h... ...herself. The other two, Unity and Hannah are in the same boat in the way that they both want to steal Tony away from Milly but when it comes to Tony actually asking them to marry him they both refuse out of pride. They are not victims but women of their time, so they do not gain my pity, as that’s just the way it was. As for the male characters such as Lodge, who dies peacefully of old age, leaving most of his money to a reformatory for boys after being the main victimiser and Tony Kytes also, after humiliating Milly totally and having a happy ending is unfair considering what happened to all the women. I think Hardy does exaggerate the victimisation of the women and praise the men in his stories and I do feel sympathy for the majority of the women but as for the rights, characters and education of all the women, that’s them just being women of their time.