Some of the important aspects of the software project management Essay

Some of the important aspects of the software project management - Essay Example The paper tells that a software development process or project is initiated to achieve some specific objectives for instance development of a software application to improve the performance of an organization or building a software application to meet users’ requirements. Nowadays, software development firms complete software development processes in the form of projects, which are effectively controlled and managed through an appropriate method acknowledged as software project management. Basically, the process of software project management involves a variety of tasks which are closely connected with each other. And the success or failure of one task can have a significant influence on other tasks. In this scenario, software project management is a systematic method for managing, controlling and setting up project tasks and resources from its beginning to completion. In addition, these resources and tasks can be divided into different stages depending on the size of a projec t. These stages could be initiation, planning, executing, controlling, and completion or termination of the project. In reality, this standard method of the project management can be used to manage any kind of project, because its fundamental goal is to organize the different tasks of project development. On the other hand, the emergence of the latest tools and technologies to manage software projects has not only changed the traditional software development practices but as well modernized them to make them more efficient. These tools allow us for rapid data processing, quick and automated project planning, digital cost planning and estimation, and so on (Project Shrink Publishing, 2012; Hughes & Cotterell, 2005). This report will present a detailed analysis of some of the important aspects of the software project management. We will divide this discussion into two sections. In the first section we will discuss the use of planning tools (software products to help managers develop W BS, NW diagrams, cost/effort/time estimation, etc.) for software project management. In the second section, we will offer an analysis of the cost estimation techniques. Introduction to Software Project Management Software project management is a kind of plan administration that pays attention especially on developing and organizing software projects. Simply like there are billions of ice cream tastes, there are billions of kinds of software systems. However, efficient and successful project managers are able to defeat them both. In software project management, a project normally is a provisional attempt to produce an exclusive service or product. In addition, for the majority of IT people, everything is a project; on the other hand, others believe that projects are particular and high level tasks that happen occasionally. In fact, a project is an exclusive thing. Alternately, the formation of a new implementation is exclusive, while the preservation and everyday support of an existi ng application is not accordingly exclusive (Tomayko & Hallman, 1989; Luckey & Phillips, 2006). Moreover, a lot of researchers believe that project management is simply a set of a wide variety of tasks and activities that are distributed to a number of people by a responsible authority normally acknowledged as a project manager. Additionally, in efficient project management there is no space for goobers. In addition, the successful project management focuses on serious trade of receiving work performed on time, within allocated budget and according to client’s needs and requirements. Furthermore, the successful project management involves various other attributes such as leadership, execution and owning the project capacity. Also, it is an excellent response to sign off on the project and know that we and our project team play a significant role in the project’

Consideration Essay Example for Free

Consideration Essay An Agreement here is defined as every promise and every set of promises, forming the consideration for each other, is an agreement defined under section 2(e) of Indian Contract Act, 1872. Making a contract is simply a way of facilitating amongst other things, the exchange of goods and services. Under a contract the, parties voluntarily assume their obligations or undertakings. Consideration is the recompense given by the party contracting to the other. 2. Consideration is the price for which the promise of the other is bought, and the promise thus given for value is enforceable. 3. Consideration means something which is of some value in the eyes of the law. 4. A valuable consideration in the sense of the law, may consist either in some right, interest, profit or benefit accruing to the one party or some forbearance, detriment, loss or responsibility given, suffered or undertaken by the other. If a bargain gives a party a choice of alternative obligations, each alternative on its own must constitute sufficient consideration for the return promise. If a promise is void or voidable – e. g. , due to the incapacity of the promisor – the sufficiency of the consideration is not necessarily negated. The judges, when they exercise this power of interference, are playing an extrinsic test which frustrates the expectation of the parties. It does not follow however, that such a test is necessarily harsh, still less that it is illogical. In some of the cases the law is settled, other are shrouded in controversies; but in all of them the grounds of interference seems to be the same. Consideration made not be adequate and may, on occasion be extremely tenuous, but it must comprise ome element which can be regarded as the price of the defendant promise; and merely to repeat an existing obligation may well seem to offer nothing at all. It may be appreciated that a person, who by his official status or through the operation of the law is under a public duty to act in a certain way, is not regarded as furnishing consideration merely by promising to discharge the duty. For example, no one would expect a policeman to bargain with a citizen for the price of his protection. In the case stated the defendant argued that this meant that they were not obliged to pay for the large number if policemen who attend their ground at home matches because, in present conditions of crowd behaviour, a major police presence at the ground was necessary to preserve law and order. The Court of Appeal thought that there was a fundamental difference on the facts. In the Glassbrook case the threat to law and order was external to the parties since neither could call off the strike. In the present case, the defendant had voluntarily to put on their matches at times, typically Saturday afternoons, when large attendance and therefore large possibilities of disorder where likely, and when a substantial police presence could only be achieved by calling policemen of their rest days and paying large sum of overtime. The police authority were, therefore, entitled to be paid. When the plaintiff is bound by an existing contractual duty to the defendant : There is no consideration if all that the plaintiff does is to perform, or to promise the performance of, an obligation already imposed upon him by previous contract between him and the defendant is illustrated by a group of thesis in the first half of 19th century. In this case the defendant where a firm of building contractors who entered into a contract for the refurbishment of a block of 27 flats. They sub contracted the carpentry work to the plaintiff for 20,000. Although there was no formal arrangement to this effect, the plaintiff was paid money on account. After the contract had been running for some months and the plaintiff had finished the carpentry at 9 of the flats and done some preliminary work in all the rest, for which he had received some 16,200 on account, he found that he was in financial difficulties. This difficulties arose partly because the plaintiff had underestimated the cost of doing the work in the first place and partly because of faulty supervision of his work men. The plaintiff and the defendants had a meeting at which the defendants agreed to pay the plaintiff a further 10,300 at a rate of 575 per flat to be paid as each flat was completed. The plaintiff carried on work and finished some 8 further flats but only 1one further payment of 1,500 was made. The plaintiff stopped work and brought an action for damages. The defendant argued that they were not liable as they had simply promised to pay the plaintiff extra for doing what he has in any case obliged to do, that is to finish to the contract. The Court of Appeal might perhaps have found consideration in what Russell LJ described as the replacement of a haphazard method of payment by a more formalised scheme involving the payment of the specified sum on the completion of each flat since it was clear that the under the original contract there was no express agreement for stage payments. 3. Composition with creditors : It has long been a common practise for the creditors of an impecunious debtor to make an arrangement with him where by each agrees to accept a stated percentage of his debt in full satisfaction. The search for a sufficient consideration to support so reasonable an agreement has caused the courts much embarrassments. It would appear at first sight to fall under the ban in Pinnels case, and such was the view adopted in 1804 by Lord Ellenborough. Two alternatives suggestions have been proffered. The first was the second thought of Lord himself. There was consideration for the composition, he suggested in 1812, in the fact that each individual creditor agreed to forgo part of his debt on the hypothesis that all the other creditors would do the ame. A moments reflection will expose the weakness of this argument. Such a consideration would, no doubt, suffice to support the agreement as between the creditors themselves. But, if the debtor sought to rely upon it, he would be met by the immediate objection that he himself had furnished to return for the creditors promises to him, and, as already observed, it is a cardinal rule of the law that the consideration must move from the prom isee. A second solution is to say that no creditor will be allowed to go behind the composition agreement, to the prejudice either of the other creditors or of the debtor himself, because this would be a fraud upon all the parties concerned. The solution was suggested by Lord Tenterden in 1818 and supported by Willes J in 1863, and it has since won general approbation. But it is frankly an argument ab inconvenienti and evades rather than meets the difficulty. Where the plaintiff is bound by an existing contractual duty to a third party : When the plaintiff performs, or promises to perform, an obligation already imposed upon him by a contract previously made, not between him and the defendant, but himself and the third party. The question whether such a promise or a performance affords suficient consideration has provoked a voluminous literature more generous, indeed, then the practical implications would seem to warrant. In a case mentioned here the defendant agreed to pay money to he plaintiff in return for the plaintiff promise (a) to execute a separation deed and b)to pay his debts to a third party. The promise to execute the separation deed raised questions of public policy but was held good consideration.

Essay --

This research project investigates whether ensemble statistics are also possible in the sound intensity domain. It has been established that people represent multiple objects as ensembles in many types of stimuli in visual domain. Also, some studies investigated this ability in auditory domain on frequency. The present study aims to show that people can also represent a set of varying decibels as an ensemble. This ability might be crucial given that in daily life people are exposed to multiple levels of sound intensities and extracting summary statistics can be beneficial to guide attention to more salient sounds, like rising sound which can indicate an approaching target, among many others. To investigate whether people represent different decibels as ensembles this study used dynamic exposure in temporal sequences and to get finer grained responses used a response method in which participants generated their own instead of choosing among alternatives. Since the relationship between decibel increase and perceived loudness increase is not linear but it follows Stevens’ power rule, it is expected that participants’ responses will provide a better fit with Stevens’ exponent for loudness in perceiving the average loudness of sounds. â€Æ' In daily life, along with individual stimuli, people encounter with crowds of stimuli and they are able to perform in the face of the abundance of stimuli. Given that sensory systems’ capacity is limited to a certain amount of information, (Alvarez & Cavanagh, 2004), instead of representing every single object individually, there may be another way for representing group of items (Ariely, 2001). Ensemble representations, which can be defined as representations that give the compressed summary statistics... ...rentiating softer sounds would not be likely, a type of dynamic display should be used. For this study, discrete presentation of individual sounds in following temporal sequences will be used. Also, as for the response selection, people will generate their own responses. This, as also suggested by Haberman and Whitney (2009), allows getting a finer grained response from the participants. Hence, this study proposes that as it is the case for many other properties of various stimuli types, humans should be able to extract summary statistics of a set of sound decibels, which is a fundamental property of our acoustic environment, but this averaging should follow Stevens power function on loudness. This research project first explores whether this is the case, whether people can find the average decibel of sounds that are presented dynamically in temporal sequences.

Literary Analysis: The Omnivore’s Dilemma Essay

In Michael Pollan’s, The Omnivores Dilemma everything we eat is somehow derived from corn. Dating back to the day of the Mayans when they were sometimes referred to as â€Å"the corn people† (Pollan 19). Pollan takes us back to the â€Å"beginning† of the industrial food chain. In The Omnivores Dilemma historical context, ideology, and setting do not do the reader justice in opening their eyes to the harsh reality that without the corn industry eating as we know it today would cease to exist. The use of historical context in The Omnivores Dilemma insufficiently details the actual origin of corn. Per Pollan’s writing he explains that â€Å"Squanto taught the Pilgrims to plant maize in 1621†¦.. † (Pollan 25), but the existence of corn dates way back much further than 1621. In a 1948 excavation of Bat Cave, New Mexico by then student of anthropology at Harvard University, Herbert W. Dick found small cobs of corn at the bottom of Bat Caves floor which were estimated to contain maize that had their beginning no later than 2000 B. C. (Mangelsdorf 148). Many different types of test have been used to determine how old the corn plant is, but only with solid evidence provided by archeologists has there been any real way to argue the actual evolution of corn. It is more than evident having conducted my own research about the origin and historical context of corn that Pollan merely â€Å"touched† on the subject matter of, where corn came from. In this day and age with many households having both the husband and wife, or single parent households, or just because of mere laziness, society as a whole doesn’t put as much thought into what we consume as they use to. For the most part what we consume is what is most convenient at the time we are hungry, but little do most of us know what it really is that we are eating†¦.. corn. As Pollan so bluntly states, â€Å"†¦. At the end of the food chain (which is to say at the beginning), I invariably found myself in almost exactly the same place: a farm field in the American corn belt† (Pollan 18) Practically everything we eat has corn in it or has been fed corn, and has been chemically altered before it reaches us. Everything from yogurt, chicken mcnuggets, and even beef contain corn of some form. Per one article, â€Å"Pollan wants us to know what it is we’re eating, where it came from, and how it got to our table†¦Ã¢â‚¬  (The Wall Street Journal), only that even after having read The Omnivores Dilemma I still had questions, questions Pollan failed to address in his book. The only remotely interesting part of Pollan’s book is the setting; various corn farms. Though interesting it still insufficiently addressed many facts. In my opinion it would have been appropriate to add that in the U. S. alone there are over 400,000 corn farms and that the U. S. s the largest corn producer in the world, producing 32 percent of the world’s corn in the year 2010 ( www. ncga. com www. epa. gov). According to the National Corn Growers Association a good 80 percent of corn grown is eaten by both domestic and overseas livestock, poultry, and even fish. Also according to the NCGA Americans eat 25 pounds of corn a year. (www. ncga. com). Pollan details how corn travels â€Å"About a fifth of the corn river flowing out from the elevators at the Iowa Farmer’s Cooperative travels to a milling plant†¦Ã¢â‚¬  (Pollan 86), but epically fails of informing us of the â€Å"bigger picture†. In conclusion, I found that by simply doing a little research on my own in the library or by searching online, not only could I find a wide range of actually interesting information on the ever so popular corn industry, but I wouldn’t fall asleep doing so as I did on more than one occasion trying to read The Omnivores Dilemma. The Omnivores Dilemma is not a book I personally would ever read again. Nor would I recommend it.

Kindergarten Readiness Skills Promotes Academic Achievement Essay

Potential Questions * Does attending Pre-Kindergarten lead to a greater success rate in Kindergarten? * Is academics more important than developing the whole child? * What advantages are achieved by students who attend Pre-Kindergarten compared to those that do not? * Why do some parents prefer not to allow their child to attend Pre-Kindergarten? * How does pre-kindergarten lottery selections affect readiness skills? Keywords Success rate Academic success Public Pre-Kindergarten Public Kindergarten. Readiness skills Parent educational level Educational Significance The researcher will use the qualitative methods approach, which would be most beneficial to support the topic. In qualitative research, the numbers and types of approaches have also become more clearly visible during the 1990s and into the 21st century. Books have summarized the various types (such as the 19 strategies identified by Wolcott, 2001), and complete procedures are now available on specific qualitative inquiry approaches. Case studies are a strategy of inquiry in which the researcher explores in depth a program, event, activity, process, or one or more individuals. Cases are bounded by time and activity, and researchers collect detailed information using a variety of data collection procedures over a sustained period of time (Stake, 1995). Background/Need for the Study Most of the long-term research on the effects of preschool focuses on low-income children. There is very little data on any long-term benefits for middle-class children. A growing number of states have started to fund preschool programs offered at public schools, called pre-kindergarten (or pre-K) programs. Reason for interest in topic As a Kindergarten teacher in the public school system for over ten years, it has amazed me that some students enter Kindergarten ill prepared. Readiness skills are a key factor in a child experiencing academic success during the early years of school. The achievement gap is gradually closing within our school district. However, outreach to parents is still vital in order to help them understand the importance of early childhood learning. References Creswell, J. W. (2008). Qualitative, quantitative, and mixed method approaches. (3rd ed. , p. 13). Sage. Stake, R. E. (1995). The art of case study research. Thousand Oaks, CA: Sage. Wolcott, H. T. (2001). Writing up qualitative research. (2nd ed. ). Thousand Oaks, CA: Sage. (n. d. ). Retrieved from http://www. healthofchildren. com/P/Preschool. html.

Huck Finn Analitical Paper essays

Huck Finn Analitical Paper essays Huckleberry Finn is not a static character, but rather a voluble and changeable because of his moral development and maturation through the novel. Inside Huck is an inner longing to achieve something that is morally sound. When his morals developed the change in Huck's morals is shown very natural, as if Huck by nature is a good person. At the beginning of the novel, Huck, feels stealing is acceptable and necessary. Huck's father taught him, "Pap always said it warn't no harm to borrow things if you was meaning to pay them back some time; but the Widow said it warn't anything but a soft name for stealing, and no decent body would do it" (Twain 71). Huck Finn accepts his father's concepts about "borrowing" things, even with what the widow tells him. This doesn't demonstrate good moral decision making, but yet is based on an inner longing to achieve a goal which is morally sound. In chapter two Huck Finn and Tom Sawyer steal candles from Ms. Watson, but they leave five cents on the table for pay, "[...] so we slid in there and got three candles, and Tom laid five cents on the table for pay" (15). Huck Finn starts to develop morally and pays for things he used to "borrow," thus showing a change in his moral concepts. With the Wilks sisters Huckleberry suffers an extreme change. This change is shown when the Duke and King were trying to swindle a group of orphaned girls. If the Duke and King were able to swindle them, the Wilk's fate will be dead and desolation. They could loss their house, their money, lands, and virginity, but Huck steals the money to prohibit the crime. I had it out of there before they was half-way downstairs. I groped along up to my cubby, and hid it there till I could get a chance to do better. I judge I better hid it outside of the house somewheres, because if they missed it they would give the house a good ransacking: I knowed that very well (176). Huck realizes that stealing is wrong, and it demonstrates...

What are the main differences between Sikhism and Jainism Essays

What are the main differences between Sikhism and Jainism Essays What are the main differences between Sikhism and Jainism Paper What are the main differences between Sikhism and Jainism Paper Essay Topic: Religion Jainism is a religion of severity. Its goal is passionless detachment, reached only through the most severe and disciplined lifestyles, culminating in death by voluntary self-starvation. The aim is to achieve the goal solely by self-effort without the help of God or gods; Although these self-imposed austerities often include benefit for others. Jains have long been active in promoting public welfare. They are known especially for their endowment of schools and hospitals for people and animals. Ahimsa meaning non-violence is the basis of Jainism. Sikhism based on a loving and ever-present God experience in the here and now is much less concerned with other worldliness. The stress is on this life, this existence and achievement of a state of physical/spiritual equipoise through constant engagement in the Divine Being (Naam). The Sikh religion is perceived as possessing two basic features, one being a mystical aspect the other more aggressive, military and world affirming. Jains constitute what is the only major religion in the world that is unconditionally vegetarian. The Sikh book of Laws, the Rehat Meryada only rejects the eating of meat which is halal-or kosher. The focal point of worship is different between the two religions. Jainisms rejection of God does not entail rejection of prayer and worship-contemplation. Jains contemplate on images of Lord Mahavir (meaning Great Hero) or other Jainas- (previous Tirathankaras). The Sikhs pray on the teachings of their eternal guru, the living guru, Guru Granth Sahib and their ten masters before. This is not worshipped as a holy book It is the knowledge therein that the Sikh adopts into his way of life. Ultimately for a Sikh, God id the profound realisation based on mature reflection of saints and prophets regardless of their religion, caste, class or status in human society. Jains do not believe in a creator God you are the controller of your destiny as in the laws of physics. The meditative focus of the Jains is on the inner light or the Tirathankaras (ones who reached salvation). They believe in energy having its own intelligence the theory of evolution. In Jainism there is no concept of a holy book. It was only introduced when the British courts of Law in their time in India, required one for oath taking procedures. It was at this time that the Kalpasutra containing a biography of Lord Mahavira written by a monk called Bhadrabahu, after the demise of Mahavira. This is one of 45 books of his writings on logic, universe, code of conduct etc. Mahavira and the other unorthodox teachers of his age were primarily interested in seeking liberation from the wheel of rebirths. Sikhs believe in there being a God without parallel and meditate on the One who is the Absolute Truth a formless God. Sikhism promotes belief in the Grace of God. They believe that God may forgive and pardon humans for their sins and wrongs Sikhs believe in a loving God. Jains talk about forgiveness without involving God in it. Sikhism is theistic (believe in God) and Jainism is atheistic (dont believe in Gods existence). Jains observe fasting during the festival of Paryushan/ Samtsari. Sikhism does not sanction any kind of fasting. Explain the main beliefs/ teachings of Jainism, comparing where appropriate, with the teachings of Sikhism (own faith) Jainism is a non-Vedic Indian religion (they do not believe in the teachings of the Vedas). The Vedic religions accept the authority of the Vedas and Vedic literature (Hinduism). Whereas Jainism accepts the authority of its own Agamas and Agamas literature- Holy Scriptures, Jainism completely rejects the notion of a creator God, an external entity. Jainism is a representation f the Sramanic culture. Jainism is humanistic in its approach and spiritualistic in its depth. Religious fervour and moral earnestness are closely associated and subscribe to the view Religion if taken seriously and rationally will be deeply moral, but it is not morality. Sikhism is a whole life socio-political religion. Its aim is to uplift the personal lives of individuals to a higher social and spiritual levels. Sikhism believes in the Oneness of God, a formless God and teaches against idol worship in any form. Jainism promotes belief in worship of a living god as Mahavir and other Tirathankaras, though they do not idolise these saintly figures. Jains worship the idea of attaining a god-like status within themselves. Jains do not believe that the universe has been created by a super-being and adopt belief in the scientific theory of the Big-Bang, laws of physics energy having its own intelligence- theory of evolution. There are similarities like setting aside a portion of ones earnings towards charity and welfare of the creation and faith. Sikhism places great importance on the underlying spirit (dharam) of religion, which is the recognition and dedicated pursuance of ones duty in life. Jainism is close to this ideal although it is much more prescriptive. Jainism occupies itself with a religious outlook: 1 The nature of the self 2 The goal of human pursuance 3 The doctrine of karma 4 The meaning of spiritual awakening 5 The incentives to a spiritual life 6 The performance of spiritual exercises such as control of five senses. The Sikh way of life relies on truthful conduct and a short formal code of discipline- Rehat Meryada, based on some basic injunctions issued by the Tenth guru, Guru Gobind Singh. The Sikhs seek daily guidance from the Word Guru, the eternal Guru, Guru Granth Sahib and the teachings therein. Sikhism believes in the existence of one Omnipotent reality called Waheguru. Jainism does not promote belief in a creator, they worship the idea of attaining god-like status within themselves. The Jain mysticism turns around two concepts Self ( atmaan) and higher Self (Paramatmaan). Each soul is a potential god i.e. Paramatmaan. As soon as the karmic limitations are removed the self realises its real nature and a state of pure perfection. Now the various innate capacities of the soul find their full expression and the soul exhibits its potential divinity. Mahavira is the figure behind Jainism-believed to be the 24 Tirathankar-Ford maker in the current era of cosmic decline. He found salvation and became a completed soul, Kevalin and conqueror Jina. The name Jain is derived from Jina.Mahavir taught for 30 years before passing away at Pava,near Patna in Bihar. Mahavir was much more of a rationalist than the Brahaminists He rejected revelation and based his religious scheme on logic and experience. He accepted the somewhat pessimistic view of the human situation and was concerned for release. As he saw the situation, the human soul was enmeshed in matter and could only gain liberation through losing its accumulation of actions and their consequences. At the heart of the Sikh religion lies the idea of the guru. God is perceived to be the true Guru-his divine and creative Word(Shabad) came to mankind in a distinctive way through ten historical figures each of whom was called a guru. God is one, the ultimate and eternal guru(satguru) who provides enlightenment and understanding for the disciple, by his own Grace. In is transcendent state he is beyond description. Gods grace enables sincere devotees to experience Him through worship and meditation. In its origin the sikh religion possesses a strong mystical and devotional basis. For Jains the Three Jewels to attain salvation are * Right knowledge * Right faith * Right conduct Right knowledge comes through the Jain creed, Right faith through believing in it and Right conduct through following it. The first two are worthless without the last so Jain monks and nuns, laymen and laywomen take vows of right conduct, the most important and all embracing of which is non-violence. For the sikh way of life,the founder of Sikhism taught the practice of truthful living * Kirt karo earn your living by honest means * Naam Jap meditate on the Oneness of God, One Absolute Truth * Vand shakna share your earnings with the needy. A3: Discuss the main beliefs on Jainism comparing them with the fundamental beliefs of Sikhism. (includes main vows) The four classes recognised by Jains are different to the quadruple division of society of the Vedic religion. The basis of division of classes in Jainism not birth but conduct. The divisions are known as 1. Sramanas monks ) homeless mendicants 2. Sramanis nuns ) 3. Sravakas laymen ) householders 4. Sravikas laywomen ) Jainism gives full freedom to all human beings to observe the vows. It provides equal opportunity to all persons to practice self discipline according to their capacity. The observers of vows are divided into two broad categories-ascetics and lay people. The ascetic observes great vows Mahavratas since he/she ceases completely from violence. The lay votary practices small vows Anuvratas in as much he/she desists partially from violence etc. Hence the ascetic vows are complete or great whereas the lay-votarys vows are partial or small. E.g. The lay votary is forbidden to commit gross violence i.e. destruction of higher forms of life those with more than one sense organ But the ascetic is prohibited to commit subtle violence also i.e. taking of lower forms of life beings with one sense organ. The five great vows for an ascetic are in the form of non-violence, non-truthfulness, non-stealing, celibacy, and non-possessiveness. An ascetic is also enjoined to practice the sixth vow of abstention from taking food and drink after sunset. The ascetic is also forbidden to commit any sin i.e. violence etc in any form. He is enjoined upon to refrain from all the sinful activities subtle and gross, physical, vocal, and mental. He neither commits a sin himself nor causes others to commit it; nor approves of its committal by others. The Jains accept the Hindu idea and beliefs in that the soul is always reincarnated, (reborn), and karma (deeds). In direct opposition to Buddhism, it teaches the existence of Self as a stable and external principle.

Quotes About the Rwandan Genocide

Quotes About the Rwandan Genocide The First Genocide 1959–61 around 100,000 Tutsis were massacred in Rwanda in what is known as the Hutu revolution, approximately one-third of the Tutsi population. The most horrible and systematic human massacre we have had occasion to witness since the extermination of the Jews by the Nazis.British Philosopher Bertrand Russell in 1964, as quoted in A People Betrayed: The Role of the West in Rwandas Genocide by Linda Melvern, 2000. Seldom in history has a once-dominant group suffered so terrible a reversal of fortune as the Tutsi of Rwanda.British Historian Robin Hallett, Africa Since 1875, 1974. The Second Genocide In 1994 approximately 800,000 Tutsis and Hutu moderates were hacked to death in a carefully organized program of genocide. It continues to be a controversial event because of the apparent indifference of the international community to the plight of the Tutsi. How the World Responded If the pictures of tens of thousands of human bodies being gnawed on by dogs do not wake us out of our apathy, I do not know what will.Undersecretary-General of the United Nations Kofi Annan in 1994, as quoted in The East Africa 18 March 1996. Rwanda is clinically dead as a nation.Nigerian Nobel Laureate Wole Soyinka, Los Angeles Times, 11 May 1994. The horror of Rwanda is too high a price to pay for a very vaporous and whimsical notion of what constitutes inviolable territorial boundaries. Nigerian Nobel Literature Laureate Wole Soyinka, Los Angeles Times, 11 May 1994. All notions of sovereignty with respect to Rwanda should be completely forgotten and we should just go in and stop the killing.Nigerian Nobel Literature Laureate Wole Soyinka, Los Angeles Times, 11 May 1994. The OAU [Organisation of African Unity] was nowhere to be found †¦ during the 1994 Rwandan genocide against the Tutsis, the OAU was furiously doing the watutsi* in Addis Ababa [Ethiopia].Ghanaian Economist George Ayittey, in Africa in Chaos, 1998.* Watutsi is a synonym of Tutsi, but also the name of a dance. The whole world failed Rwanda†¦Words attributed to UN staff members under Secretary-General Kofi Annan, reported by Philip Gourevitch in Annals of Diplomacy: The Genocide Fax, New Yorker, 11 May 1998. In such countries, genocide is not too important†¦Words attributed to French President Francois Mitterand, reported by Philip Gourevitch in Reversing the Reversals of War, The New Yorker, 26 April 1999. On Dealing With the Perpetrators The international community must hand them – and the sooner the better. The crime was capital and the punishment must be capital.President Yoweri Museveni of Uganda, from a speech at the Conflict in Africa Conference, Arusha, Tanzania, as reported in New Vision, 11 February 1998.

Operations Management Exam Essay Example | Topics and Well Written Essays - 2500 words

Operations Management Exam - Essay Example A great deal of focus is on efficiency and effectiveness of processes. Therefore, operations management often includes substantial measurement and analysis of internal processes. Ultimately, the nature of how operations management is carried out in an organization depends very much on the nature of products or services in the organization, for example, retail, manufacturing, wholesale, etc.It is about the transformation of production and operational inputs into "outputs" that, when distributed, meet the needs of customers. Operations Management deals with the design and management of products, processes, services and supply chains. It considers the acquisition, development, and utilization of resources that firms need to deliver the goods and services their clients want. Operation Management ranges from strategic to tactical and operational levels. Representative strategic issues include determining the size and location of manufacturing plants, deciding the structure of service or telecommunications networks, and designing technology supply chains. Tactical issues include plant layout and structure, project management methods, and equipment selection and replacement. Operational issues include production scheduling and control, inventory management, quality control and inspection, traffic and materials handling, and equipment maintenance policies. In a production unit (e.g. ... Capacity management is responsible for ensuring that infrastructure resources are well geared up to satisfy planned business needs effectively. The desired goal for capacity management is to provide a service that is proactive rather than reactive in nature. Measuring capacity Capacity, being the ability to produce work in a given time, must be measured in the unit of work. For example, consider a domestic air conditioning units factory that has a capacity of 10,000 " machine hours" in each 40 hour week. This factory should be capable of producing 10,000 "standard hours of work" during a 40-hour week. The actual volume of product that the factory can produce will depend on: -The amount of work involved in production (e.g. does a product require 1, 5, 10 standard hours -Any additional time required in production (e.g. machine set-up, maintenance) -The productivity or effectiveness of the factory. The major work components of capacity management are: Performance management is a continuous improvement process that examines application and system performance and analyze them for possible improvements, analyzes the costs and requirements, commissions the corrective work, then measures and reports the results. An effective performance management team can reclaim infrastructure capacity by finding ways to improve the way applications consume resources. Workload management uses data from performance monitoring tools to separate resource usage by business process rather than individual increments of usage on a particular infrastructure component. The goal is to address capacity needs on a business process basis. Since some business processes have downstream effects on other

The Transformation of the World By the Automobile Revolution Annotated Bibliography

The Transformation of the World By the Automobile Revolution - Annotated Bibliography Example The automobiles have made the economy as the core of the modern society. The cars have made the movement of goods and services from and to the market (Sutter, Driven Wild 09). In the offices, they make people are punctual. The automobiles take the perishable goods produced locally to the market (Raghnaill, 2014). This eliminates chances of getting losses. Secondly, automobiles have influenced the health of individuals in the society in cases of an emergency and non-emergency case to take the patients to the hospitals (McKinsey & Company, 2014). Today there are flying doctors without boundaries who spend most of their time in their offices waiting to utilize these vehicles to make the lives of the community better (Schensul, 2014). The automobiles have a unique way of bringing the people of the society together. With travelling over long distances made so easy and cheap, people can meet as if they live in the same village. Besides, today cars form part of entertainment in various form s. As a hobby, these people watch the rally games at their time of leisure making their life enjoyable. It is true that the impact of the automobile in the modern society is significant. It has brought about a better life and improved the quality of life. The automobiles role in the creation of economics autonomy is also marvelous. With the integration of the automobile to sport and health, it has also improved the quality of life. The automobile makes for almost all the aspect of the modern society.

Final Reflection Essay Example | Topics and Well Written Essays - 750 words - 2

Final Reflection - Essay Example It is explicitly clear that the world has changed massively from a focus on industry towards a more crisp focus on information (Fadel and Trilling, 2009). Information is readily available to everyone, everywhere in the planet at any given time thanks to the internet. I will focus on making sure that learners are taught how to sort through the barrage of information that exists so as to find the useful information applicable to their particular situations. Additionally, I will make information technology be the critical focus of the teaching and learning process. In terms of making information technology a central focus in my classrooms, I will make sure that all learners in my class have a computer with access to the internet. Accessibility to a computer with the internet will enable my students find information relevant to our classroom and also up to date. Along the line of helping my students sift through bulk information from the internet, I will guide them towards finding and using credible sited such as Google scholar and slide share. I will also help them to discriminate between useful information from useless information by teaching how to engage critically in all facets of their schooling. Indeed, the journey as been tedious, bringing me into realms of 21st- century education that I had never imagined. For instance, the concept of preparing students to meet new challenges that are still unknown and preparing them for jobs that still do not exist opened up my mind to think critically. Going forward, I think the journey is going to be much tougher than the one I have experienced. It is easier to say that we are in the information age, and that we have to base our society on information and expertise but that alone does not cut it. A lot of thinking is required to come up with innovative ways to prepare our student to be both proactive and adept problem solvers. Stakeholders in business and technology, among other

Final exam Essay Example | Topics and Well Written Essays - 500 words - 7

Final exam - Essay Example Grand nursing theories are broadest in scope and, therefore, present general propositions and concepts. Mid-range theories act as bridges between grand and nursing practice theories. They have narrower scopes and offer effective concepts. Nursing practice theories, on the other hand, offer the most limited scope and strive to address the specific issues in nursing. The three types of theories differ in their application of grand and mid-range theories proving useful in nursing researches thus contributing to the development of knowledge in the practice. Nursing practice theory offers reliable ways of handling situations by specifying the conduct of nurses and their relationships with the patients in order to enhance the recovery of the patient. Despite the above differences, the theories have a number of similarities given the fact that they enjoy immense relations. The three types of theories broaden a nurse’s understanding of the practice thereby improving professionalism. They all provide objective ways of analyzing different categories of challenges that nurses encounter in their practice thus improving the productivity of the nurses (Kim & Kollak, 2006). In his hypothesis entitled, The helping art of clinical nursing Ernestine Wiedenbach asserts that helping process should meet the needs of the patient by individualizing the care (Sitzman & Eichelberger, 2011). After observing Mary for a while, it becomes evident that she suffers from depression. Mary has a relentless feeling of loneliness, helplessness, and hopelessness that proves her depressed condition. Her condition is unique and, therefore, requires the type of individualized care that Ernestine Wiedenbach describes. Her environment enhances her depression. As such, I will advise Mary to join social groups and engage in activities of the group. Additionally, I will advise Mary to get a house help who will help provide her

Employment law 1 Essay Example | Topics and Well Written Essays - 250 words

Employment law 1 - Essay Example In the above case, Wal-Mart is not liable for any offense since US constitution protects employees with criminal background from any form of discriminatory practices in employment matters. Title VII of the Civil Rights Act 1964 prohibits all forms of employment discrimination on the basis of national origin, religion, color, or race (Repa 15). In the above case, Wal-Mart had no hiring policy requiring the criminal background of the potential employees. In the case, Bobby has only previous being convicted of a misdemeanor and not rape. However, Wal-Mart can implement a policy to request the criminal background of employees, but it must put into consideration the nature of job, the gravity of past convicted offense and time lapse since the offense before making the hiring decision (Repa 67). Wal-Mart is not liable for not requesting the criminal background of Bobby since no employment law requires the company to do so. Equal employment opportunity guidelines require all employees to av oid or minimize requesting the criminal background of employees since this may lead to discrimination in employment practices (Walsh 163). Under Equal Employment Opportunity Commission (EEOC) guidelines, Wal-Mart is not supposed to deny Bobby the employment opportunity even if the company has a policy on employee criminal background screening except when the crime is job-related (Walsh 162). Wal-Mart is not liable for any offense in hiring Bobby considering no hiring policy that requires the background checks of employees and the nature of past convictions and the current allegations of

Final exam Essay Example | Topics and Well Written Essays - 500 words - 7

Final exam - Essay Example Grand nursing theories are broadest in scope and, therefore, present general propositions and concepts. Mid-range theories act as bridges between grand and nursing practice theories. They have narrower scopes and offer effective concepts. Nursing practice theories, on the other hand, offer the most limited scope and strive to address the specific issues in nursing. The three types of theories differ in their application of grand and mid-range theories proving useful in nursing researches thus contributing to the development of knowledge in the practice. Nursing practice theory offers reliable ways of handling situations by specifying the conduct of nurses and their relationships with the patients in order to enhance the recovery of the patient. Despite the above differences, the theories have a number of similarities given the fact that they enjoy immense relations. The three types of theories broaden a nurse’s understanding of the practice thereby improving professionalism. They all provide objective ways of analyzing different categories of challenges that nurses encounter in their practice thus improving the productivity of the nurses (Kim & Kollak, 2006). In his hypothesis entitled, The helping art of clinical nursing Ernestine Wiedenbach asserts that helping process should meet the needs of the patient by individualizing the care (Sitzman & Eichelberger, 2011). After observing Mary for a while, it becomes evident that she suffers from depression. Mary has a relentless feeling of loneliness, helplessness, and hopelessness that proves her depressed condition. Her condition is unique and, therefore, requires the type of individualized care that Ernestine Wiedenbach describes. Her environment enhances her depression. As such, I will advise Mary to join social groups and engage in activities of the group. Additionally, I will advise Mary to get a house help who will help provide her

Project management Essay Example | Topics and Well Written Essays - 3000 words

Project management - Essay Example This paper aims to examine this suggested approach and determine its effectiveness as far as complex project management is concerned. 1. Statement of the Problem The concept of Project Management was first utilized in the mid 1900s, when oganizations started to systematically apply management tools and techniques to complex engineering projects (A Brief History of Project Management 2012). Fast forward to half a century later, complex projects involving developments on information technolgy requires a management style that would adapt to the dynamism of current technological breakthroughts. To support these requirements, Project Management has evolved into a discipine encompassing boundaries of multiple industries, employing fresh approaches, regardless of the project size and scope. This research will specifically focus on the Systems Approach to Project Management and its effectiveness as a guide towards the achievement of project goals. 2. Definition of Terms a. Project Management – The planning and organization of an organization’s resources in order to move a specific task, event or duty toward completion (Project Management 2012). b. ... It may also be defined as management thinking that emphasizes the interdependence and interactive nature of elements within and external to an organization (Systems Approach 2012) d. Project Management Processess – The common elements of Project Management, regardless of the methodologies used. This includes initiation, planning or development, production or execution, monitoring and controlling, and closing (Project Management 2012). e. Project Management Methodologies – Step by step tactics that details what the project manager has to do from start to finish. To date, there are 10 identified methodologies being used, depending on the project and industry type. Methodologies answer how questions pertaining to project management as a whole. 3. Methodology Research is the primary methodology used. Online journals and case studies were utilized to enable the writer to support the argument stated in the first part of this term paper. Relevant data have been gathered from s pecified documents and compiled databases in order to analyze the material and arrive at a more complete understanding of this particular project management methodology. This is a qualitative research utilizing books, write ups and other related researches. Below are the questions that this research aims to address: a. What is the systems approach to project management? b. What are the essential elements to the systems approach? c. What does it require the project manager to do? 4. Review of Related Literature Systems Theory teaches us to to look at the total system performance and the relationships between systems. Every projects is seen as a system consisting of many interrelated and

Scientific Method activity Essay Example for Free

Scientific Method activity Essay Complete the Scientific Method activity on the student website. Write a 350 word paper on the scientific method. Include the following: Describe how you applied the steps of the scientific method in the activity. Describe a real-life problem where you have or could have used the scientific method. Include the steps involved in solving the problem. I completed both the tomato growing and the car starting exercises. I first identified the problem. The tomato plants were not producing as many tomatoes as they had in the past, the car would not start. I then questioned why the plants were not producing and why the car would not start. I looked at my options for the tomato plants. First I thought that the plants needed more water. I tried this theory and was wrong. I went back to my options on how to solve the problem. Next I thought maybe the soil needed more nutrients. Once again I was wrong. Last, I tried the hypothesis of the plants needing more sun, and placed the tomato plants in a green house. This experiment worked and the plants began producing more tomatoes. With the car I had options of car battery or fluids. I tried the car battery thinking that the cables may be loose. I was wrong. I tired changing the spark plugs and fuses. I was wrong. I went back to the car battery and tried a charge. Once again I was wrong. With my only option now being the fluid I tried adding gasoline to the car and the car started. Through both experiments I observed the problem, questioned it, came up with one hypothesis, made a prediction, tired an experiment, came up with results and when I found my hypothesis was incorrect I came up with another and proceeded through the steps until my experiment was successful. Each time we do an experiment we get results. When our results aren’t working to our benefit we have to rethink. A new hypothesis must be made with the prediction of correct results. In both cases with the tomatoes and the car we learn from trial and error. A real life situation where I could have used the scientific method is for example; my stomach hurts. I have observed the situation. Why does my stomach hurt? Hypothesis – I have not been getting all of my daily nutrients. Prediction- My stomach hurts because I have not been eating right. Experiment- I try eating daily recommended servings of grains,  protein, veggies, fruits and milk products. Result- My stomach no longer hurts. I deal with this regularly because I do not eat right. I toy with eating different things, adding or taking away from my daily diet. I use the scientific method on a daily basis.

Other Personality Traits That Affect Managerial Behaviour Sociology Essay

Other Personality Traits That Affect Managerial Behaviour Sociology Essay Leadership is the action of leading a group of people or an organization, or the ability to do this Oxford Dictionary. A person exerts influence over other people, which inspires, motivates and directs their activities to help achieve common performance goals (Yukl, 1989 as cited in George Jones, 2006). The person who exerts such influence is a leader. With the influence they exert, effective leaders help groups and organisations to achieve a goal. Effective leadership also increases an organisations ability to meet all the contemporary challenges such as obtain a competitive advantage, the need to promote acceptable ethical behaviour and is essential to manage a diverse workforce fairly and impartially. As a result, this will raise the organisations chances of success (George Jones, 2006). Nowadays due to the exceptionally challenging era, leadership can be very demanding because of the pace of change, the illusion of control and the high expectations of followers (Arnold Rendall, 2010).A leader can adopt his own personal qualities, behaviours styles and decisions to develop his own leadership style (Arnold Rendall, 2010). Early leader-focused approaches to leadership have 2 main features: a description of the leader in terms of their characteristics and/or behaviour and the investigation and analysis and of the characteristics and or behaviours of what makes a good leaders regardless of what they lead (Arnold Rendall, 2010). Early leadership was more focused on finding the best characteristics that makes a person a leader or effective leader. Early work such as the work of House and Baetz (1979) came up with what characteristics that leaders tend to have at a higher degree than non-leaders. These characteristics include intelligence, dominance/need for power, self-confidence and knowledge of the task. (House Baetz , 1979). Bass (1990) also included other personality traits such as good adjustment, emotional balance and high integrity which were found to be common traits amongst leaders. (Bass, 1990) This early research did yield some interesting results but researchers did not find a constant profile of characteristics which are common to all leaders however personality and intelligence seem to be fundamental for persons to emerge as leaders and ultimately be effective leaders (Arnold Rendall, 2010). The Big Five Personality Traits People have certain characteristics which are constant to them throughout their life which can influence how they think, feel and behave both on and off the job (George Jones, 2006). These characteristic are called personality traits. These traits make you act, feel and think in certain ways which makes every individual unique. It is very important that these traits are understood since every persons personality influences their behaviour and their approach to managing people and resources (George Jones, 2006). An individuals personality is composed of five general traits or characteristics, these being extraversion, negative affectivity, agreeableness, conscientiousness and openness to experience (Digman, 1990). Each personality trait is viewed as a continuum along which every individual falls. A person can fall on the high end part or on the low end part or else somewhere in between. A persons approach to management can be described in how people are like at the high and low ends of each continuum which is an easy way to understand how these trait affect a persons approach (George Jones, 2006). The effectiveness of each trait is determined by a complex interaction between the nature of the job or organisation in which they are working and the characteristics of the person. Furthermore, some personality traits might be effective in one situation but can decrease the effectiveness in another situation. (George Jones, 2006) There are other personality traits in addition to the big five that describe peoples personalities. These are specifically important for understanding managerial effectiveness. Some examples are self-esteem, locus of control and need for achievement. Research by Fred E. Fiedler acknowledged that effective leadership depends on the characteristics of the leader and of the situation. Fiedler came up with the Contingency theory of leadership. He explains why a manager or leader may be capable in one situation and incapable in another. It also suggests which kinds of managers or leaders are more effective in different situations (George Jones, 2006). He argued that leaders have rather stable personal characteristic, leading to a characteristic behavioural style. In his theory, Fiedler assumed that how much a leader is person-oriented depends on the leaders perception of their least preferred co-worker. He concluded that task-oriented leaders are best in very favourable and unfavourable situations and those person-oriented leaders are best in moderately favourable or moderately unfavourable situations (Arnold Rendall, 2010). Desired and acceptable leadership characteristics may vary across organisational context. Sociability, need for power and need for achievement are considerably relevant characteristics which are consistent across different organisations and organisational cultures. (House Baetz , 1979). House and Baetz (1979) came up with two insights which are generally accepted by persons studying leadership: if certain characteristics are to have an impact on others and their performance, these personal characteristics need to be observable in the leader and that leader characteristics and behaviours depend on the different type of task (House Baetz , 1979). Recent studies have pointed out the effects of personal and situational factors on the development of an individual as a leader. Amongst these personal factors are personality traits and gender (Jacobowitz Pratch, 1996).One of the most distinct and difficult to change characteristics is gender. Leadership roles are typically described in stereotypically masculine terms. This could mean that women have a slight disadvantage over men in being selected for leadership roles and when selected it is difficult for them to be seen as good leaders. Leadership roles are typically predominated by men but in recent years women in leadership positions have increased considerably (Corrigall, Konrad, Lieb, Ritchie JR, 2000). This has prompted a lot of researchers to explore the relationship between gender and leadership. While the number of women in management positions has increased, there are still very few women who hold high level executive positions (Corrigall, Konrad, Lieb, Ritchie JR, 2000). It is believed that women tend to prefer jobs who offer a reward rather than high pay and advancement, which might be the explanation of their failure to attain more jobs at the top level positions (George Jones, 2006). The styles of male and female leaders may influenced by the gender-based expectations. Individuals establish certain expectations for their own and others behaviour which is based on their own beliefs about what the appropriate behaviour of male and females should be like. (Eagly, 1987) Women are stereotypically described as nurturing, supportive and concerned with interpersonal relations whilst men are viewed as being directive and focused on task accomplishment (George Jones, 2006) These stereotypes suggest that women can be more relationship oriented as managers and are more considerable in their behaviour. Men are seen as more directed towards task-orientation and engage in more initiating-structure behaviours (George Jones, 2006). People have become accustomed to the styles that men have since men have long held these roles. As a result, there is more focus on women in the discussion of the impact of gender on leadership (Eagly Johannesen-Schmidt, 2001). There is little agreement about how women actually lead even though there is this greater focus on women in research. Feminists writings have given great importance to differences and similarities between leadership styles in males and females. (Eagly Johannesen-Schmidt, 2001). A number of researchers state that there is a difference between women and men having a leadership position, whilst others say that there is no difference. Eagly and Johnson (1990) state that male and female managers having a leadership position, tend to behave in similar ways. Men do not engage in more initiating structure than women and women do not engage in more consideration than men (Eagly Johnson, 1990). Writers of trade books, have argued that thre is a difference in leadership behaviour between males and females. They tend to see women as being less hierarchical, more cooperative and ollaborative and more oriented to enhancing others self worth (Book, 2000). On the contrary, social scientists say that there is no or minimal difference iin female and male organizational leaders. (Eagly Johannesen-Schmidt, 2001). Job Attribute Preference Research has show that job attribute preference may direct a male or female manager to a different set of jobs, career paths and emplyers due to the existence of sex difference (Beutell Brenner, 1986). Job attributes have been divided into two categories: intrinsic and extrinsic factors. Job aspects that fulfil material or social needs are termed intrinsic factors and job aspects that fullfil higher needs such as growth, esteem and self expression are termed intrinsic factors. (Pinder, 1998) Research on sex differences and similarities in job attribute preferences has been enriched by two distinct theoretical persecpetives: the gender ideology perspective and the structuralist persepective. Different personality characteristics and different sets of ativities for women and man are dictated by gendered societal norms in existence is the view of the gender ideology perspective. The structuralist perspectives argues that women have poorer quality jobs than men on average because of the segregation and discrimination in the labor market. (Corrigall, Konrad, Lieb, Ritchie JR, 2000). Both of the perspectives conclude that job attribute preferences for men and women are different by they assign casualty to different underlying mecchanisms. They both predict that there will be a change in the pattern of sex differnces in job attribute preferences over time, however they conclude that the patterns of change will be somewhat different. Gender Ideology Gender ideology may be described as socially-constructed script that prescribes different characteristics, values, attitudes, behaviors and activities for women and men (West Zimmerman , 1991)Gender ideology is composed of gender roles and gender stereotypes. Gender roles are sets of norms presribing the behaiors and activities appropriate for each sex (Best Williams, 1990). Gender roles differ by cultures but in Western industrialised societies attribute the role of income provider for the family to the men and the role of homemaker to the women. Gender stereotypes are different personality characateristics which are expected from men and women. Characterisitcs such as nurturing, affiliation and passivity were associated with the females whilst characteristics such as autonomy, aggression, dominance and achievement were ascribed more to males (Best Williams, 1990).People tend to conform to gender expectations to avoid the disapproval from others. If peoples choice ofwork would reflect gender ideology, then men should consider responsibility, autonomy earnings, advancement, prestige, recognition and challenge to be more important than women do. Whilst women should value more job security, good coworkers, a good supervisor, physical work environment, helping others, growth/development opportunities, opportunities to use ones abillities, variety, task significance a feeling of accomplishment and good hours to be more important than men do. In this study conducted by Corrigall, Konrad, Lieb and Ritchie, it was found that men attached more importance to earnings and responsibility than women did. This reflects the idea that men take on the role of provider and that they need to demonstrate success and status reflecting the ideas of gender roles and stereotypes towards men. On the other hand women attached greater importance to all mentioned attributes which show that women take the role of homemaker and to demonstarte nuturing and expressiveness. The findings relate to the gender roles typically attributed to women. (Corrigall, Konrad, Lieb, Ritchie JR, 2000) Leadership styles of males and females The styles of males and females can be described in terms of the stereotypes of masculinity and femminity. Studies of peoples stereotypes about men and women show that the popular beliefs about male and female behaviour can be compiled, following Bakan (1966), in terms of two dimensions, the agentic and the communal attributes. (Jacobowitz Pratch, 1996) Agentic characteristics define primarily an assertive, controlling and confident tendency. These characteristics are typically ascribed to more strongly to men than to women. Agentic behaviours, in employment settings might include speaking assertively, competing for attention, influencing others, initiating activity directed to assigned taks and making problem-focused suggestions (Eagly Johannesen-Schmidt, 2001). Women are more ascribed to communal characteristics. This is because communal characteristics describe primarily a concern with the welfare of other people. Examples of communal characteristics in employment settings are speaking tentatively, not drawing attention to oneself, accepting others direction, supporting others and contributing to the solution of relational and interpersonal problems (Eagly Johannesen-Schmidt, 2001). Leader roles and gender roles Female leaders can adopt leadership styles that differe from those of men because they need to accommodate their behaviour to the occasioanlly conflicting demands of the female gender role and their role as a leader. There are different implications for the behaviour of male and female leaders due to gender roles. This is not only because male and female roles have different content but there is a discrepancy perceivers associate with women as having communal qualties and successful leaders are perceived as having agentic qualities. Since agentic properties are more associated to men, people tend to believe that men are better at being leaders than females. (Eagly Johannesen-Schmidt, 2001) Eagly and Karau(2001) argued that apparent difference between the typical leader roles and the female gender tends to ccreate prejudice towards female leaders. It takes two forms: (a)less favorable evaluation of womens (than mens) potential leadership because leadership ability is more stereotypic of men than women and (b)less favorable evaluation of the actual leadership behavior of women than men because agentic behaviour is perceived as less desirable in women than men. In the first prejudice, womens characteristics and the resulting female-stereotypic qualities are different from what is expected and desired in leaders. This is a result from the descriptive norms of gender roles. The second prejudice arises from prescriptive norms of gender roles namely the beliefs of how women ough to behave. Women leaders can be negatively assessed for fullfilling the agentic requirements of leader roles and thus failing to comply with the communal characteristics, even though they may be praised for their fulfillment of the leader role. (Eagly Karau, 2001) On the other hand, Sherpe (2000) states that after years of analyzing what makes leaders more effective, management gurus now know how to maximise the chances of getting a great executive. Their answer is to hire a women. The idea was first introduce by the writers feminist trade books on management and is now making tis way into the popular culture. (Carli Eagly, 2003) However in Malta, women have the highest rate of female inactivity 65.2% compared to other E.U. countries 35.7%. (Spiteri, 2012). Nevertheless, there was an increase in the rate of employement for woman which now stands at 62%,which has gone up from 55% in 1997 (Almunia, Andor, Barnier , Reding, Rehn, Tajani, 2012). Many women continue to face a glass ceiling, holding them backe in achieving a higher level in their work place. Men dominate company boards: 86.3% of board members and 96.8% of the boardroom chairs, whilst women make up 13.7% and 3.2% respectively. (Almunia, Andor, Barnier , Reding, Rehn, Tajani, 2012). Women in Malta represent only 3% of board members which is well below the EU average of 13.7% (Spiteri, 2012). On the other hand, there is a higher pecentage (22.7%) of Maltese women who are achieving higher levels of tertiary education than men(14.6%), even though when compared to other E.U. countries it is still very low (37.2% women and 30% men) (Spiteri, 2012). The National Statistics Office in collaboration with the National Council of women in Malta carried out a survey on the Perceived Obstacles to the participation of women in Decision-making Positions (2007). The rsult of this survey states that many women in malta are not advancing in their work to obtain top post because of 3 main difficulties: difficulties in reconciling long hours of work and family responsabilities, very little use of childcare facilities and lack of spouse/partner suport (National Statistics Office, 2007). Maltese Governments have always put measures in place to promote gender equality through various legislations and regulations. The constitution of Malta guarantees equaltiy between women and men. It gives protection against discrimination on various grounds including sex. Additionally, there is Article 45(11) swhich provides for special measures aimed at accelerating de facto equality between males and females (Spiteri, 2012). In 1991 Malta also approved the Convention on the Elimination of All Forms of Discrimination against Women (CEDAW). Even though these measures have been in place for a few years now, there is still a general idea that men are seen as being more siutable at having a decision-making job. There are also a number of structural and cultural barriers which are preventing Maltese women from achieving further in their job. Such barriers include jobs without opportunities of promotion or training, practices that favour men for promotions, lack of employment laws and lack of sharing of household/childcare responsibilities by fathers. There is also a considerably big barrier being the attitudes and perceptions towards gendered roles in Malta. (Spiteri, 2012). In this study, I am going to focus on the perceptions that University students have towards leaders. Whether they tend to prefer male or female leaders and on what is their decision based on. Also, I am going to study what University Students think about the effectiveness of males and females in different work settings and what is the reasoning behind the idea.

An Organizational Study of The United States Air Force :: Business Organization Research

The United States Air Force faced a leadership vacuum with the resignation of Air Force secretary James Roche and his Undersecretary Peter Teets. The Pentagon decided to take over of the buying decisions for the Air Force since they believed that there was no one who was in the position to take on the responsibility. The Department of Defense is now taking in charge to support and to assist the Air Force Command by overseeing and providing advice on important Air Force programs during a time of transition. It was clarified however that within the next six months, a new Air Force Secretary will be appointed. At present though, the Air Force is under the temporary command of Lt. Col. Michael Rodriguez (http://money.cnn.com/2005/03/28/news/fortune500/pentagon/). All organizations whether it be in the business industry, socio-civic, private or government-regulated face the challenge of running the whole system according to the principles as well as the goals and objectives of the system. The organization normally is confronted with how it will operate accordingly to meet the expectations and put up with the responsibilities and duties of the members as well as the departments that make up the whole system. The changes in the surroundings of the workplace in the internal as well as in the external environment and affairs make influence the overall operations of the structure. The military is not an exemption in this regard even for the fact that the defense team of a country undergo regulations that are very systemic and defined. There are internal as well as external affairs, issues and problems that should be attended to in order for the whole organization to function fully and provide the necessary outputs being demanded. That i s why it is interesting to look at a certain military arm experience a challenge of change in the system to be able to fit in the constantly changing global and wide social context on which it operates. Air Force Organizational Structure Just like other organizations, the United States Air Force is composed of complicated and systematic divisions. The people in this particular service are classified not just according to ranks. Since the recruits in this defense arm came from different state with varying cultural orientation, it is but expected that the people in this service are also diverse.

Plc Programmable Logic Controller

AUTOMATIC CONTROL OF HYDRAULIC SYSTEM USING PLC * Company Products & Services * Abstract * Hydraulic System * Bow Compression Machine * Circuit Diagram * Description * Chiller Unit * Solenoid valve * Introduction To PLC * Software * Advantages Of PLC * Introduction To PLC * Existing System * Proposed System * Ladder Logic Diagram * Ladder Logic Description * Energy Saving Calculation * For Existing Method * For Proposed Method * Advantages & Applications * Conclusion * References ABSTRACT :One of the challenging factor in factories, for the proper functioning of the machine for the long duration with efficiency is to keep certain parameters within a specific range. Thus, in this paper, we have designed a ladder diagram for running PLC with the objective to automatically control the hydraulic system. Our main requirement is to design a PLC which can be connected to hydraulic system to implement the parameters and operations like Temperature detection, Pressure detection, Lubrication, Automatic machine operation and Oil level detection.The mentioned parameters and operations can be sensed and operated through PLC without any manual checking and operation. This saves more power to industries by reducing the power consumption. INTRODUCTION In the last decades, the machines used in the industries were operated manually. So keeping its certain important parameters in a specific range was difficult. Also they can not be checked out frequently. This results in improper functioning of the machine. Also, the machines cannot work efficiently for a long time.For example, if the temperature of the oil goes beyond the desired value it will affect the machine function. Hence the machine accessories cannot withstand this high temperature. This leads to the damage in machine and the durability of the machine also gets reduced. Thus, the working machine requires frequent checking of certain parameters to maintain the value within the specified range for proper operation. The var ious parameters to be checked frequently are: 1. Temperature detection 2. Lubrication 3. Automatic machine operation 4. Oil level detection . Pressure Thus we are using a PLC to control all these parameters. We are designing a ladder diagram to control all the parameters automatically. In this paper, we are describing about the hydraulic drive system in which PLC is used to control its working. An introduction of PLC is provided and also the ladder diagram overview. We will be discussing about the advantages of PLC and also the power saving estimation in the industries by using PLC. The machine which we have taken under consideration for implementation is BOW CORRECTION MACHINE.Also, the chiller unit is described as it plays a major role for the power saving purpose. HYDRAULIC DRIVE SYSTEM : A  hydraulic drive system  is a drive or  transmission  system that uses pressurized  hydraulic fluid  to drive  hydraulic machinery. The term hydrostatic refers to the transfer of energy from flow and pressure, not from the  kinetic energy  of the flow. Principle of a hydraulic drive Pascal's law  is the basis of hydraulic drive systems. As the pressure in the system is the same, the force that the fluid gives to the surroundings is therefore equal to pressure ? rea. In such a way, a small piston feels a small force and a large piston feels a large force. For an understanding of how a hydraulic system works, we must know the basic principles, or laws, of hydraulics, that is, of confined liquids under pressure. This will be made easier, however, if we first examine the somewhat simpler laws governing the behavior of liquids when  unconfined, that is, in open containers. 1. Liquids in open containers. a. Density and specific gravity. The first characteristic of an unconfined liquid which interests us is its density.The density of a fluid is the  weight of a unit volume of it. The unit of volume normally used in this text is the cubic foot; the unit o f weight normally used is the pound. The standard of density, to which the densities of all other liquids are referred, is that of pure water at zero degrees centigrade (32 degrees Fahrenheit), and at sea-level atmospheric pressure. b. Force and pressure. A liquid has no shape of its own. It acquires the shape of its container up to the level to which it fills the container. However, we know that liquids have weight.This weight exerts a force upon all sides of the container, and this force can be measured. Therefore, for unconfined liquids, that is, liquids in open containers, the pressure in pounds per square inch exerted by the liquid on the bottom of the container is equal to the weight of the liquid on each square inch of the bottom of the container. It must be emphasized that the  weight  of the liquid is here thought of as a  forceexerted on the bottom of the container. Expressed as a formula, we have: Pressure = Force per unit areaIt is understood that the word pressure , when not otherwise qualified, means  pressure in pounds per square inch. This is called the total force and is obtained by the formula: Total Force = Pressure X Area The pressure exerted by a liquid on the bottom of a container is independent of the shape of the container, and depends only on the height and density of the liquid. 2. Liquids in enclosed systems. a. Liquids are practically incompressible. The following two basic principles will help to explain the behavior of liquids when enclosed: a) Liquids are practically incompressible. ) The applied pressure is transmitted equally in all directions at once. b. Increase of force with area. The ratio between the  force applied to the smaller piston  and the  force applied to the larger piston  is the same as the ratio between the  area of the smaller pistonand the  area of the larger piston. Expressed as a proportion, then, we have: Force on larger piston/Force on smaller piston = Area of larger piston/Area of small er piston This means that the mechanical advantage obtainable by such an arrangement is equal to the ratio between the areas of the two pistons.Since the area of the larger cylinder is 10 times as great as that of the smaller cylinder, pushing the smaller piston downward a distance of 1 inch will move the larger piston upward only 1/10 of an inch. The ratio between the displacement of liquid in the smaller cylinder and the displacement of liquid in the larger cylinder is once again equal to the ratio between their areas. so that the amount of work (force X distance) done by the larger piston is exactly the same as the amount done by the smaller piston. c. Multiple units.It is not necessary to confine our system to a single line from the source of hydraulic power. Hydraulic power may be transmitted in many directions to do multiple jobs. PUMP – In practice we usually need some device which will deliver, over a period of time, a definite volume of fluid at the required pressure , and which will continue to deliver it as long as we desire it to do so. Such a device is called a  pump. Basic principles of pumps. A hydraulic pump is a mechanical device which forcibly moves, or displaces, fluids.Various pumping principles are employed in the different types of hydraulic pumps, but one fundamental principle applies to all: a volume of fluid entering the intake opening, or port, is moved by mechanical action and forced out the discharge port. Hydraulic fluids. Almost any free-flowing liquid is suitable as a hydraulic fluid, as long as it will not chemically injure the hydraulic equipment. For example, an acid, although free-flowing, would obviously be unsuitable because it would corrode the metallic parts of the system. a. Basic units of a hydraulic system. 1.A reservoir, or supply tank, containing oil which is supplied to the system as needed and into which the oil from the return line flows. 2. A pump, which supplies the necessary working pressure. 3. A hydra ulic cylinder, or actuating cylinder, which uses the hydraulic energy developed in the pump to move the door. 4. A cut-out valve, by means of which the pressure in the actuating cylinder may be maintained or released as desired. 5. A check valve, placed in the return line to permit fluid to move in only one direction. 6. â€Å"Hydraulic lines,† such as piping or hose, to connect the units to each other.The supply tank must have a capacity large enough to keep the entire system filled with oil and furnish additional oil to make good the inevitable losses from leakage. The tank is vented to the atmosphere; thus atmospheric pressure (14. 7 pounds per square inch) forces the oil into the inlet, or suction, side of the pump. The tank is generally placed at a higher level than the other units in the system, so that gravity assists in feeding oil into other units. The pump is the hand-operated, reciprocating piston type. SOLENOID VALVE : A  solenoid valve  is an  electromechan ically  operated  valve.The valve is controlled by an  electric current  through asolenoid: in the case of a two-port valve the flow is switched on or off; in the case of a three-port valve, the outflow is switched between the two outlet ports. Multiple solenoid valves can be placed together on a  manifold. Solenoid valves are the most frequently used control elements in  fluidics. Their tasks are to shut off, release, dose, distribute or mix fluids. They are found in many application areas. Solenoids offer fast and safe switching, high reliability, long service life, good medium compatibility of the materials used, low control power and compact design.There are many valve design variations. Ordinary valve can have many ports and fluid paths. A 2-way valve, for example, has 2 ports; if the valve is  closed, then the two ports are connected and fluid may flow between the ports; if the valve is  open, then ports are isolated. If the valve is open when the solenoid is n ot energized, then the valve is termed  normally open  (N. O. ). Similarly, if the valve is closed when the solenoid is not energized, then the valve is termednormally closed. [1]  There are also 3-way and more complicated designs.A 3-way valve has 3 ports; it connects one port to either of the two other ports (typically a supply port and an exhaust port). Solenoid valve are also characterized by how they operate. A small solenoid can generate a limited force. If that force is sufficient to open and close the valve, then a  direct acting  solenoid valve is possible. An approximate relationship between the required solenoid force  Fs, the fluid pressure  P, and the orifice areaA  for a direct acting solenoid value is: Where  d  is the orifice diameter. A typical solenoid force might be 15  N (3.   lbf). An application might be a low pressure (e. g. , 10 pounds per square inch (69  kPa)) gas with a small orifice diameter (e. g. ,  3? 8  in (9. 5  mm) fo r an orifice area of 0. 11  sq  in (7. 1? 10? 5  m2) and approximate force of 1. 1  lbf (4. 9  N)). When high pressures and large orifices are encountered, then high forces are required. To generate those forces, an  internally piloted  solenoid valve design may be possible. [1]  In such a design, the line pressure is used to generate the high valve forces; a small solenoid controls how the line pressure is used.Internally piloted valves are used in dishwashers and irrigation systems where the fluid is water, the pressure might be 80 pounds per square inch (550  kPa) and the orifice diameter might be  3? 4  in (19  mm). In some solenoid valves the solenoid acts directly on the main valve. Others use a small, complete solenoid valve, known as a pilot, to actuate a larger valve. While the second type is actually a solenoid valve combined with a pneumatically actuated valve, they are sold and packaged as a single unit referred to as a solenoid valve.Piloted valv es require much less power to control, but they are noticeably slower. Piloted solenoids usually need full power at all times to open and stay open, where a direct acting solenoid may only need full power for a short period of time to open it, and only low power to hold it. A direct acting solenoid valve typically operates in 5 to 10 milliseconds. The operation time of a piloted valve depends on its size; typical values are 15 to 150 milliseconds. Solenoid valves are used in  fluid power  pneumatic and hydraulic systems, to control cylinders, fluid power motors or larger industrial valves.Automaticirrigation sprinkler  systems also use solenoid valves with an automatic  controller. Domestic  washing machines  and  dishwashers  use solenoid valves to control water entry into the machine. Solenoid valves are used in  dentist chairs  to control air and water flow. In the  paintball  industry, solenoid valves are usually referred to simply as â€Å"solenoids. â €  They are commonly used to control a larger valve used to control the propellant (usually compressed air or CO2). In addition to this, these valves are now been used in household water purifiers (RO systems).Besides controlling the flow of air and fluids, solenoids are used in pharmacology experiments, especially for patch-clamp, which can control the application of agonist or antagonist. Many variations are possible on the basic, one-way, one-solenoid valve described above: * one- or two-solenoid valves; * direct current  or  alternating current  powered; * different number of ways and positions; INTRODUCTION TO PLC : A  Programmable Logic Controller, or PLC, is more or less a small computer with a built-in operating system (OS). This OS is highly specialized to handle incoming events in real time, i. . at the time of their occurrence. The PLC has input lines where sensors are connected to notify upon events (e. g. temperature above/below a certain level, liquid level reached, etc. ), and output lines to signal any reaction to the incoming events (e. g. start an engine, open/close a valve, etc. ). The system is user programmable. It uses a language called â€Å"Relay Ladder† or RLL (Relay Ladder Logic). The name of this language implies that the control logic of the earlier days, which was built from relays, is being simulated.The PLC is primarily used to control machinery. A program is written for the PLC which turns on and off outputs based on input conditions and the internal program. In this aspect, a PLC is similar to a computer. However, a PLC is designed to be programmed once, and run repeatedly as needed. In fact, a crafty programmer could use a PLC to control not only simple devices such as a garage door opener, but their whole house, including switching lights on and off at certain times, monitoring a custom built security system, etc.Most commonly, a PLC is found inside of a machine in an industrial environment. A PLC can run an automatic machine for years with little human intervention. They are designed to withstand most harsh environments. When the first electronic machine controls were designed, they used relays to control the machine logic (i. e. press â€Å"Start† to start the machine and press â€Å"Stop† to stop the machine). A basic machine might need a wall covered in relays to control all of its functions. There are a few limitations to this type of control. * Relays fail. * The delay when the relay turns on/off. There is an entire wall of relays to design/wire/troubleshoot. A PLC overcomes these limitations, it is a machine controlled operation. PLCs are becoming more and more intelligent. In recent years PLCs have been integrated into electrical communications  networks  Ã¢â‚¬â€œ i. e. , all the PLCs in an industrial environment have been plugged into a network which is usually hierarchically organized. The PLCs are then supervised by a control center. There exist many propri etary types of networks. One type which is widely known is  SCADA  (Supervisory Control and Data Acquisition).The PLC is a purpose-built machine control computer designed to read digital and analog inputs from various sensors, execute a user defined logic program, and write the resulting digital and analog output values to various output elements like hydraulic and pneumatic actuators, indication lamps, solenoid coils, etc. Scan cycle Exact details vary between manufacturers, but most PLCs follow a ‘scan-cycle' format. Overhead Overhead includes testing I/O module integrity, verifying the user program logic hasn't changed, that the computer itself hasn't locked up (via a watchdog timer), and any necessary communications.Communications may include traffic over the PLC programmer port, remote I/O racks, and other external devices such as HMIs (Human Machine Interfaces). Input scan A ‘snapshot' of the digital and analog values present at the input cards is saved to an i nput memory table. Logic execution The user program is scanned element by element, then rung by rung until the end of the program, and resulting values written to an output memory table. Output scan Values from the resulting output memory table are written to the output modules. Once the output scan is complete the process repeats itself until the PLC is powered down.The time it takes to complete a scan cycle is, appropriately enough, the â€Å"scan cycle time†, and ranges from hundreds of milliseconds (on older PLCs, and/or PLCs with very complex programs) to only a few milliseconds on newer PLCs, and/or PLCs executing short, simple code. ADVANTAGES OF PLC: * PLC’s have flexibility (i. e. ) it is possible to use just one model of PLC to run any one of the 15 machines. * In a PLC program circuit the PLC program can be used from any keyboard sequence in a matter of minute and rewriting is required. PLC has a large number of contacts for each coil in its programming. * I ncreased technology makes it possible to compact move functions into smaller and less expensive packages. * A PLC programmed circuit can be pre-un ad evaluated in the officer or lab. The program can be typed in tested observed and modified if needed. * PLC circuit operation can be seen during operation directly on a CRT screen. * The operation speed for the PLC program is very fast. * PLC is more reliable. * A PLC programmer who works in digital or Boolean control system can easily perform PLC programming. PLC’s program can’t be made unless the PLC properly unlocked and programmed. LADDER LOGIC DIAGRAM : What is a Ladder Diagram? A Ladder Diagram is one of the simplest methods used to program a PLC. It is a graphical programming language evolved from electrical relay circuits. Each program statement is represented with a line, called the rung, that has all relevant inputs to the left and the output to the right. The output device of a rung is energized if electric powe r can conceptually flow from the left side of the rung to the right side.Input devices are assumed to block the flow of power if they are not activated. During the execution of a ladder diagram, the PLC reads the states of all inputs, then determines the states of all outputs starting from the rung at the top side, going down to the last rung, and finally updates the state of the output devices. * Naming Convention During the development of a PLC program, we must use specific names to identify the inputs, outputs, memory flags, timers and counters. PLC manufactures use a variety of approaches in naming the inputs, outputs and other resources.A typical naming convention is to identify inputs with the letter â€Å"I† and outputs with the letter â€Å"O†, followed be a 1-digit number that identifies the slot number and a 2-digit number that identifies the position of the input or output in the slot. For example: I1:00 refers to the first input of slot 1 O2:00 refers to th e first output of slot 2. Some manufactures number the inputs or outputs starting from 00, while others use the number 01 to identify the first input or output. It is also common to use numbers like 400 e. t. c. The state of an output can be also used as an input in a ladder diagram.In such a case the PLC uses the state of the specific output device that is stored in the output image memory. * Relay Logic Instructions (XIC and XIO) Examine if Closed (XIC) —–[ ]—— Use the XIC instruction in your ladder program to determine if a bit is On. When the instruction is executed, if the bit addressed is on (1), then the instruction is evaluated as true. When the instruction is executed, if the bit addressed is off (0), then the instruction is evaluated as false. Examine if Open (XIO) ——-[/]—— Use the XIO instruction in your ladder program to determine if a bit is Off.When the instruction is executed, if the bit addressed is off (0), the n the instruction is evaluated as true. When the instruction is executed, if the bit addressed is on (1), then the instruction is evaluated as false * Relay Logic Instructions: Input Transition Sensing Positive Transition Sense (PTS) The condition of the right link is ON for one ladder rung evaluation when a change from OFF to ON at the specified input is sensed. Negative Transition Sense (NTS) The condition of the right link is ON for one ladder rung evaluation when a change from ON to OFF at the specified input is sensed. * Output Instructions Output Energize (OTE) —-( )—– If the condition of the left link of the OTE is ON then the corresponding bit in the output data memory is set. The device wired to this output is also energized. Negative Output Energize (NOE) ——(/)—– If the condition of the left link of the OTE is OFF then the corresponding bit in the output data memory is set. The device wired output is also energized. Output L atch/Set (OTL) and Output Unlatch/Reset (OTU) If the condition of the left link of the OTL is momentary ON then the corresponding bit in the output data memory is set, and remains set even if the condition switches to the OFF state.The output will remain set until the condition of the left link of the OTU is momentary ON * Basic Logic Functions (OR, AND) Two Input OR Function The output is ON only if the two inputs are OFF. Two Input AND Function The output is ON if both of the two inputs are ON. * Basic Logic Functions (NAND,NOR) Two Input NAND Function The output is ON if any of the two inputs is OFF. Two Input NOR Function The output is ON if both of the two inputs are OFF. * Basic Logic Functions (EXOR, EXNOR) Two Input EXOR Function The output is ON if any of the two inputs is ON, but not both. Two Input EXNOR FunctionThe output is ON if both of the two inputs are either OFF or ON. * Set/Reset Latch Set/Reset Latch using a Hold-in contact Set/Reset Latch using Latch/Unlatch out puts Notes: O1:00’ means that the output is unchanged If both inputs are ON then normally the output is OFF, since the Unlatch rung appears last in the ladder diagram. * Timer Instructions Timer Instructions are output instructions used to time intervals for which their rung conditions are true (TON), or false (TOF). These are software timers. Their resolution and accuracy depends on a tick timer maintained by the microprocessor.Each timer instruction has two values (integers) associated with it: Accumulated Value (ACC): This is the current number of ticks (time-base intervals) that have been counted from the moment that the timer has been energized. Preset Value (PR): This is a predetermined value set by the programmer. When the accumulated value is equal to, or greater than the preset value, a status bit is set. This bit can be used to control an output device. Each timer is associated with two status bits: Timer Enable Bit (EN): This bit is set when the rung condition to t he left of the timer instruction are true.When this bit is set, the accumulated value is incremented on each time-base interval, until it reaches the preset value. Done Bit (DN): This bit is set when the accumulated value is equal to the preset value. It is reset when the rung condition becomes false. * Timer On-Delay (TON) Instruction The TON instruction begins count when its input rung conditions are true. The accumulated value is reset when the input rung conditions become false. Timer ladder diagram example. Typical timing diagram (Assume that Preset = 07). * Timer Off-Delay (TOF) InstructionThe TOF instruction begins count when its input rung makes a true-to-false transition, and continues counting for as long as the input rung remains false. The accumulated value is reset when the input rung conditions become false. Timer ladder diagram example. Typical timing diagram (Assume that Preset = 07). * Retentive Timer (RTO) Instruction The RTO instruction begins count when its input rung conditions are true. The accumulated value is retained when the input rung conditions become false, and continues counting after the input rung conditions become true. * Counter InstructionsCounter Instructions are output instructions used to count false-to-true rung transitions. These transitions are usually caused by events occurring at an input. These counters can be UP (incrementing) or DOWN (decrementing). Each counter instruction has two values (integers) associated with it: Accumulated Value (ACC): This is the current number of the counter. The initial value is zero. Preset Value (PR): This is a predetermined value set by the programmer. When the accumulated value is equal to, or greater than the preset value, a status bit is set. This bit can be used to control an output device.Each counter is associated with two status bits: Counter Enable Bit (EN): This bit is set when a false-to-true rung condition to the left of the counter instruction is detected. Done Bit (DN): T his bit is set when the accumulated value is equal to the preset value. It is reset when the rung condition becomes false. The maximum count value is 9999*. After a maximum count is reached, the counters reset and start counting from zero. * Count-up (CTU) Instruction The CTU instruction increments its accumulated value on each false-to-true transition at its input, starting from 0. Counter ladder diagram example.Typical timing diagram (Assume that Preset = 10). * Count-down (CTD) Instruction The CTD instruction decrements its accumulated value on each false-to-true transition at its input, starting from 0. Counter ladder diagram example. Typical timing diagram (Assume that Preset = -10). * The Reset (RES) Instruction The RES instruction resets timing and counting instructions. When the RES instruction is enabled it resets the following. Counters:Accumulated value, Counter Done Bit , Counter Enabled Bit. Timers: Accumulated value, Timer Done Bit, Timer Timing Bit, Timer Enable Bit.R eset ladder diagram example. ADVANTAGES ; APPLICATION: * Automatic control of machine. * Free from manual operation and frequent checking. * Machine fault is reduced. * Energy consumption is reduced. * This method can save more power. * Industrial application mainly used for boiler production. * Drilling and boring applications. * This applications can be implemented for all machines in BHEL. BOW CORRECTION MACHINE : These are the specifications of the bow correction machine currently in use. MACHINE| BOW CORRECTION MACHINE| CAPACITY| 600 TONS| CYLINDER BORE| 550 MM| RAM DIAMETER| 520 MM|DAYLIGHT| 3000 MM| THROAT| 1700 MM| STROKE| 500 MM| CONNECTED LOAD| 60+1+5 HP| TOTAL WEIGHT| 80 TONS| BOLSTER SIZE| 1500*2000*200 MM| SPEEDS OF OPERATION| 15mm/sec – APPROACH6mm/sec – PRESSING60mm/sec – RETURN | PURPOSE. In the pipes used in boilers, small pipes are attached using welding. This welding makes the pipe to bent. Thus its surface becomes uneven and makes it imperfec t to be used in boilers. In this case this machine is used. Using this machine the bents and bows can be straightened and makes the pipes perfect to be used in the boilers. CIRCUIT DIAGRAM : OPERATION.The hydraulic circuit is designed to achieve fast approach speed, slow pressing speed and fast return speeds by use of a single pump. The fast approach speed is achieved by ensuring that the cylinder ram moves down through its self weight or what is termed as gravity fall. To achieve gravity fall of the cylinder of the cylinder it is important to ensure that at all times the pressure in return line is minimum 5 kg/ cm2. On starting the motor the pump delivery is directed to the tank through unloading type relief valve no. 4. The same flow is directed to the Z1 lines of catridge valves 5 ; 7, which ensures that the valves are closed.On operation of solenoid S1 of main relief valve the pump flow is directed to the catridge valves, however due to differential areas the catridges are still closed and pump reaches system pressure and unloads to tank through relief valve 4. On operation of solenoid S2( valve 6) along with S1, Port A of solenoid valve no. 6 is connected to tank Y1 which facilitates opening of catridge valve 5 and hence the oil flows into the forward line of the cylinder resulting in downward movement. At the same time the oil in the return line of the cylinder is connected to tank at the set pressure through valve no. 11.Hence the cylinder moves down with slow pressing speed. On operation of solenoid S4 ( valve 8) along with S1 ; S2 the X port of catridge valve 10 is connected to tank through valve 8, 6 and port Y1 that ensures the opening of the catridge valve 10. Opening of the catridge valve ensures that the return line is connected directly to tank and hence the cylinder oves down with its self weight and fast approach speed is achieved. At the same time prefill valve 14 opens to fill the cylinder forward area with oil. To set the maximum fast appro ach speed valve 10 is provided with a stroke adjustment setting.On operation of solenoid S3(valve 6) along with S1, port B of solenoid valve no. 6 is connected to tank Y1 which facilitates opening of catridge valve 7 and hence oil flows into the return line of the cylinder. At the same time since A port of solenoid valve no. 6 is connected to pump port X4 is also connected to pump, ensures the opening of prefill valve no 14 and that the forward line of the cylinder is connected back to tank. This results in reverse movement of the cylinder. Pressure relief valve 9 is provided to ensure smooth deceleration of the cylinder from fast approach to pressing.The valve ensures that the pressure in X port of the cartridge valve does not exceed set pressure therby ensuring that the valve closes slowly reducing jerks. The hot oil from the machine is then sent to the chiller unit to reduce its temperature. CHILLER UNIT: In the chiller unit, the refrigerant is used to cool down the hot oil from the machine. REFRIGERATION: A liquid whose Saturation temperature at normal atmospheric pressure is below the temperature that is to be produced by refrigeration is chosen as the working liquid in the refrigerant.Such a liquid will evaporate at lower temperatures and will absorb hear as it does so. This heat is extracted from the surroundings. The vapour formed in this way is compressed in a compressor. After compression the refrigerant may be in the vapour state or, in the liquid state if its temperature after compression is not greater than the saturation temperature at that increase pressure. The low temperature vapour is condensed in a condenser, in doing so it lowers its temperature below the surroundings . Now the condensed liquid is expanded to a lower pressure and the cycle of refrigeration is repeated.REFRIGERATION CYCLE: * Compressors are used in vapour compression cycles. It is the heart of the system and it sucks low-pressure refrigerant vapour from the evaporator and co mpresses it to a pressure corresponding to the saturation temperature that will be higher than continuously re-circulate the refrigerant through the system. * Air-cooled condensers are heat exchangers,which reject heat from the condensing refrigerant to the atmosphere. * The function of condenser in a refrigerated system is to de-superheat and condense the compressed discharge refrigerant vapour.High-speed fans are mostly used to speed up the process. * At the exit of the condenser the refrigerant loses temperature but still is in high-pressure state. The temperature falls down a little high to the ambient. * Dryers are mainly used to capture the moisture content if any mixed with the refrigerant. When the refrigerant passes through its thin filter mesh the moisture gets trapped on the silica gel and clean refrigerant flows through. * Throttle valve(also called as Expansion valve)is also a very important component of the vapour compression refrigeration system.The function of an exp ansion device is to expand the liquid refrigerant from the condensing pressure to the evaporating pressure. Also it throttles the required flow into the evaporator depending on the load conditions. Commonly used expansion devices are capillary tubes, thermostatic expansion valves and constant pressure expansion valves. * Any liquid when evaporate creates a cooling effect. Same applies here, when the refrigerant exists expansion valve it is partly in vapour state at low temperature and pressure. It flows through the evaporator and exchanges heat with the surroundings. After existing the evaporator it has gained heat from the surrounding media, thus lowering the temperature in the freezing compartment. This superhead vapour passes further and is drawn by the compressor, which compresses it,and delivers to condenser, thus, completing the refrigeration cycle. The ladder diagram used in this machine is : CNT_ON CNT_OFF MEM_1 MEM_1 MEM_1 MOT_ON MOT_ON MOT_OFF VAL4_ONVAL4_ON VAL4_ON MEM _2 MEM_2 S1 S2 S3 S4 S5 FAST_APP FAST_APP S1 S2 S3 S4 S5 PRESS_ON TIMER T1 PRESET 15 ACC 0 PRESS_ON S1 S2 S3 S4 S5 HOLD_ON HOLD_ON HOLD_MEM HOLD_MEM S1 S2 S3 S4 S5 RET_ONRET_ON VAL4_ON COMPARE TEMP_ON;45 TEMP_ON MEM_4 MEM_4 CHILLER_ON TEMP_ON CHILLER_OFF COMPARE TEMP_ON;45 LOW_SEN ALARM_ON V_LOW_SEN TANK_ONPRES_ON VAL14_ON EXISTING SYSTEM : * There is no temperature detection system. Hence, the chiller unit has to function continuously irrespective of hydraulic oil’s temperature. * Possibilities of machine can run due to friction since there is no Indication of oil in tank. * The chiller unit is running continuously hence there is a possibilities of lot of Energy consumption losses. * There is no automatic control for the whole machine. * There is no automatic function for declamping and lubrication. There is no oil level sensor in the hydraulic tank to sense the oil level in the tank. * Relays are used which is not automatic and inefficient. HORIZONTAL BORING MACHINE HY DRAULIC TANK CHILLER UNIT PUMP SOLENOID VALVE PROPOSED SYSTEM: * In this method there is a temperature sensor which is used to sense the temperature of the oil in the hydraulic tank. * The chiller unit will be turned on only when the oil temperature gets increased with the specified value of oil temperature * Friction of the machine can be reduced by implementing the lubrication function. Oil level in the hydraulic tank can be detected by using an oil level sensor . * Two types of oil level sensor is used. I. Low level sensor II. Very low level sensor So that we can avoid the machine running in dangerous condition. * All the operation in one axis (x or y or z) can be operated by a single push button switch. * Declamping and lubrication function takes place automatically. ENERGY SAVING CALCULATION: * WITH CHILLER UNIT WORKING CONTINUOUSLY: For continuous running of chiller unit the motor consumes 18KW. Per day: morning -4hrs night -8hrs so chiller unit runs totally 12hrs a day. 8KW*1 2hrs=216 KWhr The chiller unit consumes 216KWhr per day. For electricity: 1unit= Rs. 5 Therefore 216*5= 1080 So for 216 unit it costs Rs. 1080 per day. 1080*30=Rs. 32,400 For 1month it costs Rs. 32,400 32400*303= Rs. 98,17,200 For 1year it costs Rs. 98,17,200. * WITH PLC: For automatic on/off of chiller unit the motor consumes 10KW. Per day: morning -4hrs night -8hrs so chiller unit runs totally 12hrs a day. 10KW*12hrs=120KWhr The chiller unit consumes 120KWhr per day. For electricity: 1unit= Rs. 5 Therefore 120*5= 600 So for 120unit it costs Rs. 600 per day. 600*30=Rs. 8,000 For 1month it costs Rs. 18,000 18000*303= Rs. 54,54,000 For 1year it costs Rs. 54,54,000. CONCLUSION : This project mainly focuses the oil temperature and oil level detection and also the automatic control of machine. Implementation of this project is simple and very economical. This applications can be implemented for all machines in BHEL. All the functions can be achieved through a single PLC program. The adv antage of our project is used to eliminate manual checking and operation. The above mentioned parameters and operation can be sensed and operated through PLC.This project saves more power to industries by reducing the power consumption. REFERENCES : 1. â€Å"Allen bradely Instruction Set user manual† by Rockwell Automation. 2. Programmable Logic Controllers: Programming Methods and Applications by John R. Hackworth and Frederick D. Hackworth, Jr 3. â€Å"Ladder logic fundamentals† industrial control system fall 2006. 4. DOE FUNDAMENTALS HANDBOOK â€Å"INSTRUMENTATION AND CONTROL Volume 2 of 2†- U. S. Department of Energy Washington, D. C. 20585. 5. â€Å"Automating Manufacturing Systems with PLCs† (Version 5. 0, May 4, 2007) -Hugh Jack