Kodak vs. Fujifilm Essay

I began writing to show how business can quickly go out of business if the owners do not keep an eye on its public. Kodak failed to meet its customer’s needs, so the company could not keep up with demands. Have you ever gone shopping and found yourself searching for an item you have seen advertised in another store, only to be told that the item was out of stock or this store does not carry that product. This is what happens when supply does not keep up with demand. The company goes under, under the strain of their competitor’s reactiveness. Kodak needed to make changes sooner rather than later when their management made decisions that could help or hurt Kodak. Fuji constantly made changes and made the necessary changes to meet their customer’s needs. As a business owner being able to reach and understand each customer will help in sales so profits will rise. Many people continue to shop where products are cheap and convenient. Staying in business is knowing and meeting different people with different wants and needs and then helping them with finding an inexpensive means of finding them. That is the nature of business and a way to keep a customer satisfied. Building a relationship with customers is the most important aspect in business. If the business does not speak directly to its customer’s they will soon have a loss in customers. Management plays an important part in the structuring of a business if the manager is not being active in the search for new ideas. Therefore technics to improve the company that company will be lost. New  products must be advertised and sold in order to grow successfully. Ideas must be turned into products and problems concerning issues in a product must be changed into improvements for the customer. All these things must be completed to make sure there is a constant growth in business, so its sale s could be turned into capital to expand the business. Kodak vs. Fujifilm Growing up in a big family where parents loved taking pictures and capturing that special moment. Kodak and Fujifilm played an enormous role in many households around the world. When it comes to history and competition, management strategies play a key role in the way two competitive companies embrace innovation. Kodak and Fujifilm companies focus on both photography and imaging as their core businesses. Kodak had an upper hand by starting earlier than Fujifilm, 1888 compared to 1934 (Kodak and Fujifilm, 2012), Fujifilm adapted more to the market changes and currently still is a leading force in the film industry. Kodak was in bankruptcy protection since January 2012 under Chapter 11 with hopes to try to reconfigure its business strategies. Slow and comp lacey adaption dominated in Kodak Company’s while Fujifilm embraced diversified spirit in all aspects of the market relevance. Each company’s ethics and social approach clearly reflects their profitability to give back to the community. Production standards were maintained that satisfied all consumers. Possible changes of the decision-making process that would embrace flexibility and be the best way to ensure diversity and innovation in any organization. Describe the History and Core Business of Each Company Kodak Kodak was formally known as Eastman Kodak Company. The founder George Eastman (1888), patent and developed a technology that would change the way we see things in still life. Eastman launched the ease to photography, the first simple click camera, photography equipment, film, paper, and color chemicals. Kodak was making a profit by the 1990’s. (â€Å"Building the Foundation†, n.d.). Although Kodak developed the basic technology for the digital cameras in 1975, the idea was dropped due to the fear that it would threaten the film business (Williams, 2013). Kodak dropped the ball on what  would have been the biggest technology development in the film industry because they could not see the future without traditional film. Digital cameras are much faster and more efficient than the traditional film, so Kodak sales dropped considerably. Competition from other companies would eventually lead to Kodak’s loss of market shares in United States and worldwide. January of 2012, the company filed Chapter 11 bankruptcy protection, and a year later, the court approved financing. Kodak, they sold patents to a group of companies: Apple, Microsoft, Google, and others. Fujifilm The Japanese company was founded in 1934 (Fujifilm, n. d.). They focused on photography and imaging. The company soon ruled the Japanese market, which was ranked second after the United States in film usage (Fujifilm, n. d.). Eventually, the company entered the global and American market with a bold move, using aggressive marketing and low prices (Fujifilm, n. d.). The turning point of the Fujifilm’s success in this venture was marked by the 1984 Los Angeles Olympics (Fujifilm, n. d.), when they became the official film of the event. This placed Fujifilm on the market permanently, and the company started taking over Kodak’s market share by offering equal quality products for a cheaper price (Fujifilm, n. d.). As Fujifilm prepared for the fast changing needs in the market, it widened its business scope to digital cameras, printers, photocopiers, and optical devices (Fujifilm, n. d.). It also tapped into the health sector, producing medical equipment that includes X-ray i maging and chemicals (Fujifilm, n. d.). Compare and Contrast the Approach to Management That Each Company has Pursued in Order to Embrace Innovation. Kodak’s failure to embrace innovation in a timely fashion could be blamed on its management’s approach. They seemed to â€Å"rule† from behind the desk from their Rochester headquarters, which made them ignorant about the coming changes in technology and customers’ needs, and how it would affect them. Even when they were advised that the move to digital technology was necessary, management still refused to take action. In fact, avoiding revolutionizing the technology they originally created is the main reason behind Kodak’s current troubles and loss of share in the market (Williams, 2013). Although they created the first ever digital camera back in 1975, top-level management rejected the idea in fear of losing its core business  in film. Looking back, this seems to be the turning point in the company’s fortune (Mui, 2012). The predicted change to digital technology 20 years later was seen as the far future, and as the company enjoyed success, leadership did not see a reason for change. In recent years, however, Kodak tried to change its management strategy in embracing innovation. They shifted to delocalize research and collect data, in order to gather more information about consumer preferences. They also diversified top-level management to ensure best skill input in each field, and implemented a more democratic management style that listens to staff suggestions and ideas (Williams, 2013). Fuji, on the other hand, took a different approach from the beginning; while they were successful in the film business, they prepared for the switch to digital technology and developed new business lines. Initially, they started off as a photography and imaging company, then diversified into different other products such as digital cameras, cosmetology, and medical equipment. This enabled Fujifilm to achieve profits depending on the preferences of their various customer bases. After its successful dominance in the Japanese market, Fujifilm realized the potential in venturing into the global market. The 1984 Olympics in Los Angeles marked the breakthrough point in this venture, when Fujifilm became the official film of the event. This provided the company the opportunity to get a growing portion of Kodak’s market share (Schum, 2012). A joint venture with the UK based Xerox (Fuji Xerox) helped establish further global production and sales. Their consolidated funds equipped both companies with capability for innovation, research & development, and investments. Determine what other management differences have impacted the relative success of Kodak and Fujifilm. Provide specific examples to support your response. Opposing to change by management was a major cause for the failure of Kodak. Even though they dropped the ball on the digital technology, Kodak got the credit for the digital invention. They felt their initial plans and strategy worked so well that change was not needed. The management team believed that its core strength was in the brand and marketing that they coul d just partner up with or buy into a new industry such as drug or chemicals. But without in-house guidance, Kodak lacked the ability to integrate the companies it had purchased and to negotiate profitable partnerships (Schum, 2012). Unlike Kodak, Fujifilm implemented its goals and ideas, and the company’s quick  reaction to change was an advantage over Kodak. The success of Fujifilm can be mainly associated with Management’s flexibility to be innovative and venture into new technology, which has put the company at the top of the photographic industry since its founding in 1934 (K.N.C., 2012). When Fuji realized that digital photography would be the way of the future, the company went through some changes to get away from the same type of marketing that Kodak was stuck on. Fuji still went through a number of years of losing profit because of making film manufacturing and sales its main business, but eventually Top Management had to implement new strategies. Evaluate each Company’s approach to Ethics and Social Responsibilities and the impact those approaches have had on each company’s profitability. In 2004, Kodak was ranked 58th out of the top 100 companies surveyed for the listing of, â€Å"Best Corporate Citizens†. This acknowledgement was given by Business Ethics Magazine, and according to the article, Kodak had been in the running for 5 years (Business ethics names, 2004). Some of the areas that Kodak was recognized for were for the company’s anti-discrimination policies, and its fair treatment of women and minorities (Business ethics names, 2004). From a social responsibility standpoint, Kodak contributes to, and supports a number of community organizations such as, the United Way, museums, cultural facilities, and performing arts organizations (Community affairs, 2013). The only aspect of poor social responsibility that I can apply to Kodak would be from the years of poor management decisions and a waste of money on a division of the company. Kodak did not prepare for the future, and ended up having to file bankruptcy, which stained the company’s image. Hopefully, Kodak management has learned from the mistakes of the past and be a respected brand. Kodak is committed to environmental, ethical, and social responsible operations that include maintaining safe work environment and providing quality products. Kodak’s single-use recycling programs help to avoid waste while saving resources and reducing cost of reusing the recycled material. All in effort to promote Kodak’s images as a trustworthy and thorough company. Fujifilm is obligated to ethics and social responsibility as well. The company’s mini-lab network provided them with benefits of international economic scales for both manufacturing and marketing operations (Tsurumi & Tsurum.,  1999). For example, Fujifilm’s cost of goods sold as a percentage of sales continued to decline from 1980’s to 1990’s, although it had to a bsorb repeated cost of imported silver materials. Fujifilm spent ten times more for advertisement than Kodak did in Japan (Japan Market Research, 1995). This ensures that these measures and values are integrated in all company procedures. They also implemented a transparency policy to keep the government and customers aware of its business activities. Discuss the extent to Which Management of both Companies adapted to changing Market conditions. From what I have researched and wrote about, Kodak stood firm in their traditions and was confident in their brand and marketing strategies. Kodak management had great inability to adapt to the changing marketing conditions when the signs were there for the future. That inability led them straight to bankruptcy (Schumpeter, 2012). Currently, the company is trying to reconstruct its strategies with a main focus on commercial printing. Fujifilm, on the other hand realized that major changes were necessary the coming of the new photographic film. Management made the appropriate moves to prepare for the future marketing conditions. They ability paid off. Fujifilm management team displayed the true value of innovation, strategy, and execution compared to Kodak management team. There diverse in-house expertise insured a smooth transformation (Schumpeter, 2012). Recommend three (3) ways any company should build in flexibility to back up its decision-making process in order to adapt to changing market conditions. An open mind: Management should have upward communication in its companies marketing strategy and decision making process. The lower-level management team gives the upper-level management team positive or negative feedback on the operation issues, problems, and performance of a company in order for all operations to run correctly and smoothly. Broad minded employees are open to new ideals and will be a great asset to the growth of any company or business. Global Expansion to Long Term-Planning: Designing their products according to the global market changes. Making comments to increase the products and services by constantly assessing and improving the processes used to create those products. By doing so, the company could expand in marketing faster, reliable, and satisfactory products in services to make customers return. Teamwork: Managers and non-managers collaborating with business owners, suppliers, employees, and customers working together to make improvements and solve problems in a company. Combining different skills and allowing employees to work together as a team to get a Clients order completed. References Bloomberg, (1998). Kodak-Fuji in U.S expected to heat up, New York. www.articleslatimes.com/1998/feb/16/busines/fuji.bloombergnews Fujifilm. (n.d). Fujifilm Global. Retrieved from http://www.fujifilm.com/ Kodak. (n.d). Building the Foundation. Kodak. Retrieved from http://www.kodak.com/ek/US/en/Our_Company/History_of_Kodak/Building_the_Found ation.htm Mui, C. (18 January, 2012). How Kodak Failed. Forbes. Retrieved from http://www.forbes.com/sites/chunkamui/2012/01/18/how-kodak-failed Schumpeter,(2012). How Fuji film survived, www.economist.com/blogs/Schumpeter/2012/how- Fujifilm survived William, C (2012). Management: MGMT5. (5th ed.). Mason, OH) South-Western Cengage Learning Ziemba,S.(1996) articles about Fuji- chigogotribune.www.articles.chicogotribune.com/keyword/Fuji

Mobile Cement Plant Process Flow Chart

Mobile Cement Plant Process Flow Chart The main raw materials used in the cement manufacturing process are limestone, sand, shale, clay, and iron ore. The main material, limestone, is usually mined on site while the other minor materials may be mined either on site or in nearby quarries. Another source of raw materials is industrial by-products. The use of by-product materials to replace natural raw materials is a key element in achieving sustainable development. In the wet process, the slurry is fed to a rotary kiln, which can be from 3. m to 5. 0 m in diameter and from 120. 0 m to 165. 0 m in length. The rotary kiln is made of steel and lined with special refractory materials to protect it from the high process temperatures. Process temperatures can reach as high as 1450oC during the clinker making process. In the dry process, kiln feed is fed to a preheater tower, which can be as high as 150. 0 meters. Material from the preheater tower is discharged to a rotary kiln with can have the same diameter as a wet process kiln but the length is much shorter at approximately 45. m. The preheater tower and rotary kiln are made of steel and lined with special refractory materials to protect it from the high process temperatures. Mobile Cement Bag Packaging Plant Our Mobile Cement Bag Packaging Plant mainly including Mobile Jaw Crusher Plant , Mobile Cone Crusher Plant , Mobile Impact Crusher Plant , the mobile cement bag packaging plant specification :1. Available in 2 – 6 Spouts model 2. Available in Wheel mounted or Fix Models. 3. Auto-weighing system with bag pushing system 4.Pre-assembled with solenoid valve, limit switch etc. 5 Sub-divided in to Heavy duty Air Compressor 6 Capacity : 10- 60 ton per hour. The black, nodular clinker is stored on site in silos or clinker domes until needed for cement production. Clinker, gypsum, and other process additions are ground together in ball mills to form the final cement products. Fineness of the final products, amou nt of gypsum added, and the amount of process additions added are all varied to develop a desired performance in each of the final cement products.Our mobile cement plants are used in Indonesia, Vietnam , Iran, India, Chile, Venezuela, Libya, Angola, Kenya, South Africa, Pakistan , Yeman, Eygpt, Nigeria, Tajikistan , Saudi Arabia , Zimbabwe, Dubai, Vietnam, Philippines, Brazil. Cement Plant Equipment 1. Kilns  : We have manufactured high-quality kilns, made of varied materials, since a long period of time. All kilns are excellent heat exchangers where heat is transferred in a variety of ways. We produce kilns which are made with precision and detailed accuracy.They are highly durable and made with attention to each and every detail as provided by the client. 2. High Efficiency Separators  : We also supply high efficiency separators with our cement plants. High availability, high selectivity, low energy consumption, proper product separation, cooling and drying, and relatively lo w capital expenditure are all the features available in our high-efficiency separator.. 3. Crushers  :A machine to reduce large solid chunks of raw material into smaller chunks.It is widely used in a cement plant. We are manufacturers of a wide range of crushers. We supply all types of crushers and crushing equipment to be used in cement plants. 4. Feeders  : We supply you a range of feeders in varying sizes and shapes. Used in cement plants, the feeders we are offering are efficiently designed for heavy duty applications. Available in different capacities and sizes, our feeders have been well-tested for facilitating uniform flow of materials to the crusher and conveyors. 5.Conveyors  : We offer our customers with premium quality conveyors which are used for transporting products from one end to another. Highly durable and robust, our conveyors are specially designed to handle all types of load and materials in a cement plant. 6. Hoppers  : Our range of hoppers are available in various capacities as required by customers. These hoppers are highly durable and have a rugged performance. Catering to the technological developments, our products have successfully met the industrial standards. Mobile Cement Plant Process Flow Chart Mobile Cement Plant Process Flow Chart The main raw materials used in the cement manufacturing process are limestone, sand, shale, clay, and iron ore. The main material, limestone, is usually mined on site while the other minor materials may be mined either on site or in nearby quarries. Another source of raw materials is industrial by-products. The use of by-product materials to replace natural raw materials is a key element in achieving sustainable development. In the wet process, the slurry is fed to a rotary kiln, which can be from 3. m to 5. 0 m in diameter and from 120. 0 m to 165. 0 m in length. The rotary kiln is made of steel and lined with special refractory materials to protect it from the high process temperatures. Process temperatures can reach as high as 1450oC during the clinker making process. In the dry process, kiln feed is fed to a preheater tower, which can be as high as 150. 0 meters. Material from the preheater tower is discharged to a rotary kiln with can have the same diameter as a wet process kiln but the length is much shorter at approximately 45. m. The preheater tower and rotary kiln are made of steel and lined with special refractory materials to protect it from the high process temperatures. Mobile Cement Bag Packaging Plant Our Mobile Cement Bag Packaging Plant mainly including Mobile Jaw Crusher Plant , Mobile Cone Crusher Plant , Mobile Impact Crusher Plant , the mobile cement bag packaging plant specification :1. Available in 2 – 6 Spouts model 2. Available in Wheel mounted or Fix Models. 3. Auto-weighing system with bag pushing system 4.Pre-assembled with solenoid valve, limit switch etc. 5 Sub-divided in to Heavy duty Air Compressor 6 Capacity : 10- 60 ton per hour. The black, nodular clinker is stored on site in silos or clinker domes until needed for cement production. Clinker, gypsum, and other process additions are ground together in ball mills to form the final cement products. Fineness of the final products, amou nt of gypsum added, and the amount of process additions added are all varied to develop a desired performance in each of the final cement products.Our mobile cement plants are used in Indonesia, Vietnam , Iran, India, Chile, Venezuela, Libya, Angola, Kenya, South Africa, Pakistan , Yeman, Eygpt, Nigeria, Tajikistan , Saudi Arabia , Zimbabwe, Dubai, Vietnam, Philippines, Brazil. Cement Plant Equipment 1. Kilns  : We have manufactured high-quality kilns, made of varied materials, since a long period of time. All kilns are excellent heat exchangers where heat is transferred in a variety of ways. We produce kilns which are made with precision and detailed accuracy.They are highly durable and made with attention to each and every detail as provided by the client. 2. High Efficiency Separators  : We also supply high efficiency separators with our cement plants. High availability, high selectivity, low energy consumption, proper product separation, cooling and drying, and relatively lo w capital expenditure are all the features available in our high-efficiency separator.. 3. Crushers  :A machine to reduce large solid chunks of raw material into smaller chunks.It is widely used in a cement plant. We are manufacturers of a wide range of crushers. We supply all types of crushers and crushing equipment to be used in cement plants. 4. Feeders  : We supply you a range of feeders in varying sizes and shapes. Used in cement plants, the feeders we are offering are efficiently designed for heavy duty applications. Available in different capacities and sizes, our feeders have been well-tested for facilitating uniform flow of materials to the crusher and conveyors. 5.Conveyors  : We offer our customers with premium quality conveyors which are used for transporting products from one end to another. Highly durable and robust, our conveyors are specially designed to handle all types of load and materials in a cement plant. 6. Hoppers  : Our range of hoppers are available in various capacities as required by customers. These hoppers are highly durable and have a rugged performance. Catering to the technological developments, our products have successfully met the industrial standards.

Dual Diagnosis Treatment Essay Example | Topics and Well Written Essays - 4000 words

Dual Diagnosis Treatment - Essay Example The police initiated most of these. Each time Leon was admitted, he was intoxicated and vocalised thoughts of persecution. Once, he tried to hang himself whilst in the hospital. At the age of fourteen, he began to use amphetamines and ecstasy. This has ceased only because he lost contact with friends he used to socialize with and used these drugs with after Leon became engaged in the mental health system. He stopped using cannabis daily and, as a result, his alcohol consumption increased to six litres from four litres of hard cider every day. He usually drinks this when he is on the street with friends. He experiences a feeling of needles and pins in his feet and hands. He believes this is caused by the medications that have been prescribed for him; however, this symptom can be caused by thiamine deficiency which is one of the possible side effects of abuse of alcohol because of dependency on this substance. His past treatment was receiving alcohol detoxification when he was in the hospital. Leon has repeatedly relapsed after his discharge. Several times, during his hospital stay, Leon drank alcohol whilst there and was discharged early because of this. Leon is somewhat concerned about his alcohol consumption but he perceives this in a positive manner because it provides a social outlet. He believes it also helps to diminish the residual hallucinations he writes that he experiences even when he is taking his medication properly. He has professed the belief that the stopping the use of cannabis was all of the change in his lifestyle that he could handle. He wants what he considers a "normal life." Leon would like to have a one on one personal relationship with a partner. (Starkey, Leon, date unknown) Leon has four

Kant's Metaphysics of Morals, the Importance of Duty Essay

Kant's Metaphysics of Morals, the Importance of Duty - Essay Example All of which were important aspects in the moral determination of the will that would contrue an act as moral or ethical. Kant’s normative ethics posits that the best way to act morally is to act from duty with the consideration of the highest good. That is, acting through the moral determination of the will. Kant’s acting through the moral determination of will meant that the motivation of one’s action must be pursued with the good without condition which is intrinsically good by itself. He formulated his deontological ethics in a categorical imperative of doing good for the sake of good regardless of its consequence. The three propositions of moral determination of the will are as follows; Universal Law formulation which is to act only on that maxim through which you can at the same time will that it should become a universal law. This means that if one is to act good, that will should not be subjected to any condition or any physical constraints. Humanity or E nd in Itself formulation which posits to act in such a way that you always treat humanity, whether in your own person or in the person of any other, never simply as a means, but always at the same time as an end. This meant the free will is a source of rational action. And that humanity, is not just a result of an action but also the motivation of such action and how the action is carried out. A logical free will should therefore be an end itself because an end is subjective that they needed to be pursued whereas, the rationale action is objective and therefore must be categorically pursued. Kingdom of Ends formulation is the integration of the first two laws that says all maxims as proceeding from our own [hypothetical] making of law ought to harmonize with a possible kingdom of ends. This meant an autonomous will is not subject to anything but it must bind itself to the first two laws to make it applicable to everybody that people by themselves are both a means and an end. In sum, Kingdom of Ends formulation meant that the end and the means must be harmonized to be good and this is applicable to all circumstances without exemption. Kant explained the etymology of the expression of his deontological ethics. According to Kant, imperatives imply what they just meant which are commands such as â€Å"wake up early†. Often they are hypothetical imperative because they only serve a specific objective or purpose such as â€Å"wake up early so you will not be later for work†. This imperative or command becomes categorical when it is applied universally and that the actions and decisions of individuals are to be judged solely by their motivations and that the consequences do not matter morally (as in the case of hypothetical imperative) neither the intended consequences nor the actual consequences matter morally; only the principle or rule we follow if we do the action matters morally. In simpler terms, this meant doing what is good regardless of consequ ence and that by doing is an end by itself. Thus, actions themselves become an end and this action should be a rational result in the exercise of freewill. In the example stated, categorical imperative dictates to â€Å"wake up† early because it is good to wake up early even without considering one’s need not to be late for work. Consistent to this, Kant’s categorical imperative states that every person has the duty to use and exercise his goodness/humanity as a means to an end. The application of Kant’s second law of categorical imper

U.S. War on Terror and Africa Essay Example | Topics and Well Written Essays - 1250 words

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European Competition Law Essay Example | Topics and Well Written Essays - 1250 words

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IT in Businesses. Week Six Essay Example | Topics and Well Written Essays - 500 words

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Computer-Mediated Communication Essay Example | Topics and Well Written Essays - 1000 words

Computer-Mediated Communication - Essay Example Out of hundreds of SNSs, some of the most popular examples of this form of CMC include MySpace, Facebook, and Twitter which have become an integral part of daily practices for people around the world. Basically, the aim of this paper is to contemplate the efficacy and significance of SNSs as they form a very important example of CMC and then apply course concepts like online self-disclosure and disembodiment to them so as to explain how CMC functions or relates with the course concepts through SNSs. As mentioned above, SNSs support a variety of public interests and service like information sharing and networking as a result of which CMC has been made a lot easier on many levels. While some of such sites cater to a particular group of people who share same cultural or regional background, most sites typically cater to the needs of diverse audiences. In addition to this feature, there exists a difference in the way various information and communication tools are incorporated in differe nt sites as all SNSs do not offer the facility of online blogging or instant video/image sharing. One of the most interesting features of this example of CMC is that not only people who are already connected outside the computer world can take advantage of the facilities offered by such sites, but strangers are also facilitated a lot as most sites support them much in connecting easily based on similar set of interests and shared political, racial, or education views (Boyd and Ellison). Though SNSs imply the concept of networking hugely yet researchers suggest that this alone could not be considered as a solo feature which helps differentiating SNSs from other mediums of CMC like blogs and social support sites. This is because networking is neither the sole service nor the sole purpose of most of such sites rather educational and business purposes also remain significant. Though a lot of connections are made between people by this medium of CMC which might not be made otherwise, yet that could not be classified as the sole goal of SNSs. â€Å"What makes social network sites unique is not that they allow individuals to meet strangers, but rather that they enable users to articulate and make visible their social networks† (Boyd and Ellison). A lot of business deals and transactions are finalized online by using such sites for enhancing communication between parties from opposite ends of the world. Similarly, this forms a great means of CMC also because education is made a lot easier as owing to many lectures offered online by expert teachers, one does not necessarily have to attend colleges on a full-time basis now. Many academic and industry researchers have written a lot in the past years concerning the wide range of academic and social advantages offered by SNSs. These sites are capable of addressing many interests of the public when it comes to communication by using effective and handy communication tools like online blogging, mobile connectivity, an d video/image sharing. In addition to that, there are certain course concepts like online self-disclosure, disembodiment, and privacy management which help much in further understanding the significance of CMC. Anonymity and self-disclosure on weblogs creates much excitement for the bloggers online. This is because people can open up about their

Impact of 360 Feedback on Job Performance Essay

Impact of 360 Feedback on Job Performance - Essay Example The paper tells that the 360Â ° feedback approach gathers behavioral observations from many sources within the organization and includes employee self-assessment. The individual completes the same structured evaluation process that superiors, project team members, peers, and, in many cases, external customers use to evaluate performance. Survey questionnaires, augmented by a few open-ended questions, typically are used to gather information. Then, the summary results are compared against organizational strategies, values, and business objectives. The feedback is communicated to the individual with the assistance of the company’s human resources department or an outside consultant. The present research has identified that at present, this technique is used by a growing number of firms including General Electric, AT&T, Mobil Oil, Nabisco, Hewlett-Packard, and Warner-Lambert. Usually, multisource feedback is collected for managers or supervisors, but it could be collected for an y employee, with the raters depending on the employee's role in the organization. Multisource ratings are not always collected from all possible sources. For instance, sometimes only upward ratings are collected (i.e., subordinates are asked to rate their supervisor). Multisource ratings are collected through surveys using the computer, telephone, in-person interviews, or paper-and-pencil questionnaires. The survey may be administered annually or more often.

Important Contribution(s) of Different Scholars to the Field of Essay

Important Contribution(s) of Different Scholars to the Field of Biblical Studies - Essay Example 4 Cullmann was among the most influential in reformed Biblical theology and his studies on the New Testament eschatology and Christology led him to suggest a position of heilsgeschichte; redemptive history over the common positions of C.H Dodd and Albert Schweitzer. Redemptive history connotes that â€Å"With the life, death and resurrection of Jesus Christ, the eschaton has already began as the presence of the congregation of glory is defined by the power of redemption†¦.† His important contributions to the New Testament studies include titles like â€Å"The Immortality of the Soul or the Resurrection of the body?†, 5 â€Å"The Christology of the New Testament†, â€Å"Early Christian Worship†, â€Å"Salvation and History†, â€Å"Early Christian Worship† but to mention a few. In â€Å"Christ and Time†, he defended claims that New Testament only refers to time as being linear that is yesterday, today and tomorrow and that no philosophy should try and mix other forms of time not mentioned therein. This led him to write an article â€Å"The Immortality of the Soul or the Resurrection of the body?† in which he showed that the widespread attribution of â€Å"the resurrection of the soul† to primitive Christianity was plausible and that this was rather associated with Greek mythology. 6His article further attributed death to the wages of sin and as the last enemy. He presented Jesus Christ as the first born from death and proceeded to presented the death as those who sleep. This article led to a lot of controversy especially in some protestant churches but at the same time received support mainly from Adventist Churches.7 Cullmann in his book â€Å"The Christology of the New Testament† established a balance in the New Testament data regarding the life and work of Jesus Christ. 8This he achieved by remaining as faithful as possible to the New Testament depiction of Jesus Christ. This

Reaction Paper About UNICEF Cities Failing Children Essay Example for Free

Reaction Paper About UNICEF Cities Failing Children Essay As a Filipino and youth of this country, I’ve appreciated UNICEF’s efforts in regards with the children who are in need. It is not easy to aggregate data of the country’s status just to check how are the citizens especially the children are treated and supported by the countries, particularly of their local governments or cities where they are settling. However, the report and data were compiled and reported by State of the World’s Children of UNICEF though it was an article, reported few years ago (March 7, 2012), still it makes me feel uncomfortable and burdened, knowing that many children are deprived of most basic services and necessities that actually they should have. In addition, UNICEF cited Philippines as an example of their article entitled, Cities Failing Children. The report states that children (Filipinos) who live in poor urban even other class of urban communities experience deprivations such as lack of decent housing and limited access to clean water and they are more exposed to disaster risks and are also more prone to neglect, abuse, and exploitation. It proves that our government is not doing the part that they should be performing, like what we have learned from our previous lesson, Power of the State – the three inherent power of state specifically the police power, which states that it is the sovereign power to promote and protect the general welfare; it is the most pervasive and the least limitable of the three powers of the state, the most essential, consistent and illimitable which enables the State to prohibit all hurtful things to the comfort, safety and welfare of the society, these just become meaningless at all for in reality, this power is not being fully exercised and practiced by our government. In my opinion, our government should at least exert extra sympathy or attention with this kind of problems rather than to their own agendas and non-sense conflicts of their parties. I think it is not impossible for the Philippines to cure and solve this kind of problem if we just unite and our government stop their not-so-needed plans because I strongly believe that the true wealth of the nation is the children and next generation, but if this problem continues and will not be given attention, I assume that next coming years will be more hard to live for. Nevertheless, it’s not late to do something for this kind of problem it is just a matter of love, passion and honesty of our government and even of  us that are more blessed than them. Further, I never lose hope that one day Philippine government and possibly with the help of UNICEF, will use the power of the state to build and create a better future for our generation especially for those children deprived of their basic needs or even their basic rights and solve a lot of problem within these children. Therefore, as a Filipino informed of this matter, we should take responsibility to do something for our beloved country. I have learned that I should have not take for granted things that I have because almost half of our population are deprived of the basic needs that I already have. I don’t want to promise anything but I will try to do the best I can to serve and help our nation. Hoping that after few years, UNICEF’s report about Philippines even their report about the world will be better and be full of hope and great future for the people and most of all, for the children.

Different Power Factor Correction Engineering Essay

Different Power Factor Correction Engineering Essay Different power-factor correction methods are reviewed, as well as the back ground to the power-factor. Problem is arising in modern electrical distribution systems due to the connection of rapidly increasing numbers of non-linear electronic loads. The basic principles of harmonic generation and limitation in power systems are first discussed. The main part presents a critical review of commonly used power-factor correction techniques that have been identified in a literature review, and highlights the advantages and disadvantages of these techniques. After the analysis of methods and their working principles, the development of the most promising systems such as the boost-type PFC converters is considered. Finally, a project plan is proposed for the next phase of the dissertation work. This will involve investigating the operation, dynamic control and performance of the most promising systems by conducting a theoretical study and setting up and running a number of simulation models using the MATLAB/SIMULINK software tools. Key-words: Power factor correction, harmonic mitigation, PFC converters Contents List of Abbreviations and Principle Symbols Abbreviations: AC Alternating Current APF Active Power Filter CCM Continuous Conduction Mode DC Direct Current DCM Discontinuous Conduction Mode DF Distortion Factor FFT Fast-Fourier analysis IGBT Insulated Gate Bipolar Transistor PF Power Factor PFC Power Factor Correction PWM Pulse Width Modulation RMS Root Mean Square THD Total Harmonic Distortion TDD Total Demand Distortion Principle Symbols: Power Factor Distortion Factor Displacement Factor h Harmonic contents RMS value of the line-current fundamental component RMS value of the line-current harmonic components Total RMS value of the line-current 1. Introduction It is now clearly visible from power systems journals and general literatures that power-factor correction is now an important research topic in the power systems area. As non-linear power electronic systems are increasingly being connected to power systems in greater quantities as well as capacities for such applications as power quality control, adjustable speed drives, uninterruptible power supplies, renewable energy-source interfacing, and so on [1] [2]. The power quality regulators of those systems are highly concerned now, because some of their drawbacks, such as harmonics generation and reduced power factor can spoil their advantages [3]. Power electronic systems are effective because their high efficiency and rapidly adjustable output. However, when processing and controlling the input electric energy suitable for users [4], power electronic systems often operate at a low power-factor, and that may cause serious problems to power system operators by reducing distribution comp onent RMS current capacity and to other users on the same network by distorting the sinusoidal supply voltage seen by other user connected at the same point of common coupling as a heavy electronic or power electronic load.. Of all power line disturbances, harmonics are probably the most serious one for power users because they exist under steady state conditions. This literature review considers harmonic generation prediction of power electronic systems and examines the effectiveness of harmonic mitigation methods. The boost-type power factor correction converters will be taken as the core power factor correction method for future research. The existing publications arising from research in this area and their conclusions have set a good foundation for this report. Results in this report will be based on a theoretical study and simulation studies using software MATLAB/SIMULINK power-factor correction system models which be developed. 2. Background This section provides discussion on the fundamental principles of power-factor correction, including definitions of power-factor terms and a consideration of the common standards which affect how harmonics controlled in power system. Also, the harmonic generation prediction of ideal power electronic systems is discussed at the end of this section 2.1 Important definitions and objective of power-factor correction The power factor (PF) is the ratio of the real power to the apparent power [5] and gives a measure of AC supply utilization on how efficient that the energy is supplied and can be converted into effective work output. The definition of power factor is as shown below: (2.1) In the definition, the value of the power factor is always between 0 and 1, and can be either inductive or capacitive. That means average power is always lower than apparent power. The reason is harmonic components and phase-displacement angle,. Hence, the power factor equivalent can be described as below: (2.2) is termed the (current) distortion factor (DF) and represent the harmonic components in the current and relative to wave shape [6]. DF is defined as the ratio of the fundamental current component to the RMS current value [4]. is termed the displacement factor and defined as the current and voltage waveform phase angle [6]. Displacement factor has unity value for in-phase current and voltage. The increase of displacement angle will cause larger reactive current in the power system [4]. Hence, the objective of power-factor correction is to decrease the current distortion or harmonic content and increase the displacement factor or bring the current in phase with the voltage. The closer power factor is to the unity value, the higher efficiency and lower energy loss. And the power system will operate at a lower supply voltage. Another commonly used index for measuring the harmonic content of a waveform applied for current distortion level is total harmonic distortion, THD. THD is the distortion current as a percentage of the fundamental current. The equation of THD is given by: or (2.3) In AC supply utilizations, power factor,, can be expressed in terms of THD and the displacement factor: (2.4) With these equations, it is easy to see that high THD leads to low power factor and even damaging of the power network. THD and power factor will be used together in the following work as important index in measuring performance of the harmonic mitigation techniques. 2.2 Effects and limitation of harmonic distortion on power system In any power conversion process, to get high efficiency and low power loss are important for two reasons: the cost of the wasted energy and the difficulty in removing the heat generated due to dissipated energy [4]. The performance of power output efficient is defined by several factors. The power factor and harmonic distortion are the most important ones. References [8] [9] show the main issues of harmonics within the power system include the possibility of them exciting series and parallel resonances which cause a further increase of harmonic levels, low efficiency caused in generation, transmission, and utilization of electric energy, increasing thermal losses in the electrical components and shortening their useful life and causing malfunction of motors and other components in the power system. Those effects can be divided into three general categories: Thermal stress, Insulation stress and Load disruption [10]. Those represent effects on increasing equipment losses and thermal losses, increased value of current drawn from the power system and insulation stress and failure to action and malfunction of some electrical devices and systems. The IEEE Standard 519-1992 recommended harmonic current limits with an additional factor, TDD. This is very same as THD except the distortion factor is expressed by load current instead of fundamental current magnitude [11]. Hence, the equation of TDD is given by: (2.5) Therefore, IEEE Standard 519-1992 limitation for harmonic current in power system expressed with TDD is shown below: Maximum harmonic current distortion in percent of Individual harmonic order (Odd harmonics) TDD 4.0 2.0 1.5 0.6 0.3 5.0 20 7.0 3.5 2.5 1.0 0.5 8.0 50 10.0 4.5 4.0 1.5 0.7 12.0 100 12.0 5.5 5.0 2.0 1.0 15.0 >1000 15.0 7.0 6.0 2.5 1.4 20.0 Even harmonics are limited to 25% of the odd harmonics limits above. Table 2.1 IEEE 519-1992 Standard for harmonic current limits [12]. Also, there are limitations for power system harmonic voltage and power factor regulation, like IEC 61000-3-2 standard. The methods for power factor correction should not cause disturbances for other aspects of performance. 2.3 Harmonics generation in power electronic systems Power electronic systems may naturally operate at low power-factor due to large harmonic generation and phase shifting in controlled devices like controlled rectifiers. Understanding characteristics of the harmonic current is essential for harmonic mitigation research. Based on the form on the two sides, converters can be divided into four categories [4] including: 1. AC to DC (rectifier) 2. DC to AC (inverter) 3. DC to DC 4. AC to AC Power electronic systems always draw high quality of low frequency harmonic current from the utility and hence cause problems for other users. Take an ideal single-phase diode bridge rectifier as example, the total harmonic distortion can be up to 48.43% [4] and the 3rd harmonic current can be as large as one third of the fundamental current. If a non-linear load is considered, the displacement factor will fall down from unity value and cause a decrease of power factor. This is surely over the harmonic standards limitation and needs to be corrected. Theoretically, Rectifiers and choppers output DC and draw a fundamental AC source current and large low frequency harmonic content. On the other hand, inverters output low frequency AC and supply fundamental current and harmonic content usually at higher frequency. Harmonic contents can be reduced by harmonic mitigation techniques and hence increase power factor. Take Fourier analysis result diagram of single-phase diode bridge rectifier and PWM control Buck converter as example. (a) (b) Figure 2.1 Fourier analysis diagram for input current of (a) single-phase diode bridge rectifier and (b) PWM control Buck converter. 2.4 Software tools for harmonic mitigation evaluation To filtering harmonic current in the power system, the frequency of harmonic contents is essential. However, in practice, the harmonic frequency is not absolutely equal to the theoretical value and that makes analysis of harmonic frequencies very difficult. The reason is stray inductance and capacitance in the system and reverse recovery time and forward voltage drop of non-ideal devices [1]. To analyze harmonic contents, appropriate software can be helpful. In this project, the software chosen to help analyzing harmonic current drawn by power electronic systems is MATLAB/SIMULINK. Taking the three-phase diode bridge rectifier as an example, a simulation model can be established as shown below. In the model, a three-phase 50Hz AC power supply is used for a resistive load and most devices are not ideal. The model is followed by the diagram of input current waveform and frequency spectrum of AC input current. Values of each order harmonic content and total THD are given by Fast-Fourier (FFT) analysis in powergui analysis tools. With the help of Fourier analysis, the performance of harmonic mitigation techniques can be evaluated and compared quickly. Figure 2.2 Simulation model for three-phase diode bridge rectifier. Figure 2.3 Waveform of rectifier input current (phase A). Figure 2.4 Frequency spectra of AC input current of three-phase rectifier. 3. Power Factor Correction Techniques After tens of years developing and improving, various types of power factor correction techniques or harmonic mitigation techniques can be chosen to solve power factor problem. Those techniques can be divided into five categories [11] [13] as shown below: 1. Passive filters Passive filters can improve power factor with low cost and reduce high frequency harmonics effectively. However, they are always in large size and cannot vary flexibly with system changes [4] [14]. If tuning reactors are not used, parallel resonance may occur in operation [15]. 2. Active filters Active filters improve power factor and provide stable output even under varying supply condition, and reduce harmonics in the output current effectively and efficiently [4] [16]. These, however, always requires much higher costs and the harmonic currents they injected may flow into other system components [13] [14]. 3. Hybrid systems Hybrid active filters combine active and passive filters together in various forms [17]. Hence they can reduce initial and running costs and improve performance of the filter [11] [13]. Smaller filter inductor, smaller dimension, light weight and better filter performance hybrid system take advantages of both passive and active filters [18]. However, the complexity of operation is the main drawback of hybrid systems. 4. Phase multiplication Increasing the pulse number of power converters can raise the lowest harmonic order generated by the converter [2]. Typically, 6-pulse converter has the lowest harmonic order of 5 [1]. When rising pulse number to 12, the lowest harmonic order can increase to 11. As value of harmonic current are ideally proportional to fundamental current value [4], the amount distortion of the power system can de reduce to a low level. On the other hand, the effectiveness of this technique is based on balanced load [13] which rarely happens in practice. 5. PWM PWM converters have much better performance compared to traditional converters like diode rectifiers and square-wave control inverters [4]. As a control strategy improvement, PWM harmonic mitigation technique can even used with some devices for traditional converters and hence get broad application prospect [11]. However, the topology complexity and difficult on designing controllers [19] makes the use of PWM is limited. The objective of these techniques is to make the input current nearly a pure sinusoidal waveform and hence to improve the power factor in electrical supply system. All these five techniques are discussed separately in the following work. 3.1 Passive filters Passive filters have widely been used to absorb harmonics generated by the power electronic systems, primarily due to their simplicity, low cost and high efficiency [20]. Passive filters are always consists inductors, capacitors and damping resistors [21]. The objective of the passive filter is to stop the flow of the harmonic current from disturbing power system, either by preventing them with the usage of series filters or diverting them to a shunt path [9] [11]. That is the different between series filter and shunt filter, too. Series filters can be tuned LC system or only a single inductor in the system. Parallel inductance and capacitance are tuned to provide low impedance for fundamental frequency current and high impedance for a selected frequency current, always high level harmonic current. The series tuned filters are simple and reliable to use. The circuit configuration can be shown as below. Figure 3.1 Series LC tuned filter. The series tuned filters are always used as input filter for power electronic systems. However, a big drawback limits the using. If the series tuned filter is used in a VSI system as the input filter for the inverter, several order harmonic current need to be filtered, 5th, 7th, and so on. Each order harmonic current required an individual filter, and hence the size of the system can be intolerable. On the other hand, shunt filter have much more types including shunt-tuned filter, double-band pass filter and 1st, 2nd and 3rd -order damped filters. Also, broadband filters are good solution for filtering wide range of harmonics [22]. The circuit configurations of these widely used passive filters are like shown below. (a) (b) (c) (d) Figure 3.2 Typical harmonic filters: (a) Single-tuned filter (b) Double tuned filter (c) High-pass parallel filter (d) C-type high-pass filter [5] [27]. A few single tuned filters cope with large level harmonic contents and a high-pass (2nd order) filter filtering high frequency harmonics is the typical model for shunt passive filters and can get better characteristic than series filters [24]. Take the single tuned filter as example, single-tuned filter also called the band-pass filter as only a selected frequency of current can pass in low impedance. The tuning frequency of the single-tuned filter could be: (3.1) And at this frequency, the impedance of the filter is: (3.2) where s is the Laplace operator, L represents value of inductance and C represents the capacitance value. However, mostly passive filters can only filtering 30% of harmonic current in the power system [23] and can not match IEEE 519-1992 standard well. Even the broadband filter, which can filter a range of harmonic contents and reduce system THD to approximately 10%, the resonance caused by the filter and the big size of inductor and capacitor still limit the usage of the filter. So we can get the list of advantages and disadvantages for passive filters shown in table 3.1. Advantages Disadvantages Effectively for filtering high frequency harmonics Low availability for low frequency harmonic filtering Very low cost and reliable Bulky devices and inflexible devices parameters Simple structure Individual branch is necessary for each dominant harmonics in the system High probability resonance Table 3.1 List of passive filter performances [4] [14] [25] [29]. 3.2 Active power filters (APF) The basic idea of an active filter is to compensate current or voltage disturbance so as to reduce the reactive power electronic systems drawn from the power system [23]. The active filters using in power system are not the same as what we use in electronic circuits. The active filters conventional means combined operational amplifiers and passive components like inductors and capacitors, and always been used in electronic circuits operating under low voltage. That is the beginning of the active compensation applications and came out earlier than active filters using in power systems. The active filters which are used in power system for active power compensation and harmonic compensation are always called Active Power Filter (APF) [30]. The active in APF means the filters are act as power sources or generators and provide compensation currents which have opposite phase angle with the harmonic currents in power system [30]. Similarity between electronic circuit active filters and pow er system active filters are the requirement of external power supply. The active filters which are talked in the following parts are all means APF. With the active power filters, the compensation for reactive power and for harmonic current can de done at the same time, hence efficiency on harmonic compensation and also dynamic response are all be improved [23]. The trend of active power filters began in 1970s and was introduced by Mr. Akagi. The incentive for active filters is the inductor is not appropriate to use under high frequency, so the trend is to replace the inductor with active components. As the harmonic contents in the power system various frequently, fast response of active filters required a good control strategy to make active filters smarter and faster. But more complex devices and sophisticated control strategy are required, that all makes active filters more expensive and hard to use [26]. Active filters can also be classified by converter type as shunt-type active filters and series-type active filters. The diagrams of two basic types of active filters are shown below. The other way to classify active filters is the phase number of filters which will be discussed later. (a) (b) Figure 3.3 Diagrams of (a) Shunt-type active filter and (b) Series-type active filter [11] [28]. Series active filters are good at compensate voltage harmonics and capacitive, voltage-source loads. When applied to an inductive or current-source load, a low impedance parallel branch is necessary. Similarly, shunt active filters are always used with inductive, current-source loads and high current distortion conditions. Sometimes over current condition occurs with the use of shunt-type active filters [31]. Typical working principle of the active power filter is: 1. Detection. The sensor detects the waveform of the instantaneous load current and feedback to the controller, which is typically a digital processing block. 2. Analysis. Load current is always high distortion current including fundamental current and many orders of harmonic current. The processor must distinguish the fundamental current with the harmonic currents and give out the information including frequency, value, and phase angle of harmonic contents, so as to control the power source inverter providing opposite phase current of harmonic current. 3. Compensation. The power source inverter draws current from individual DC voltage supply and converting to required current to cancel harmonic currents. Like the diagram shown below. Figure 3.4 Diagram of compensation characteristics [31]. Hence, we can draw a conclusion of advantages and disadvantages of active power filters shown in the table below. Advantages Disadvantages High compensation efficiency and high ability on harmonic compensation Low reliability with sophisticated control system and devices Small size components Difficult to construct a large rated current source with a rapid current Fast action on harmonic current variation makes good dynamic response High initial costs and running costs No resonance causing Complex control strategy and controllers are necessary Suitable for widely supply and load conditions, like unbalanced power supply Table 3.2 List of active power filter performances [13] [22] [30] [31]. 3.3 Hybrid systems Hybrid filters comes from the idea to combine the advantages of both passive filters and active filters together hence to get brilliant performance on harmonic mitigation [17]. Combine passive filters and active filters can significantly reduce costs and improve the compensation characteristics in the power system. Also, various types of hybrid systems of passive and active filters can get better performance than only passive or active filters. Like the reference [18] and [20], small rating active power filter and passive filter connected in serial or shunt type. Smaller filter inductor, smaller dimension, light weight and better filter performance hybrid system take advantages of both passive and active filters [18]. However, as the basement of the hybrid power filters are always active power filters, the initial costs and control complexity is still big disadvantages of hybrid systems. 3.4 Phase multiplication The purpose of phase multiplication is to increase the pulse number of the converter and hence to increase the harmonic order and frequency [4]. The low frequency harmonics can be mitigated effectively and phase multiplication technique does not cause serious resonance and other bad effects on power system performances [13]. The practical application of phase multiplication technique, the multipulse converters, have the ability to draw low distortion current from power source and generate DC current with low level ripple [32]. Typically, 6-pulse converter has the lowest harmonic order of 5 [1]. When rising pulse number to 12, the lowest harmonic order can increase to 11. As value of harmonic current are ideally proportional to fundamental current value [4], the amount distortion of the power system can de reduce to a low level. Also, the multipulse thyristor converters can output various value current by controlling the thyristor fairing angle () [32]. The drawbacks of phase multiplication technique are mostly the contradiction between the cost and output characteristic. If controlled output is required, the multipulse converter should contain at least 12 switching devices and that can be a big amount of costs. On the other hand, multipulse converter only use diodes may operate on low efficiency [11]. 3.5 PWM PWM (Pulse Width Modulation) is a modern control technique for power electronic systems. PWM converters have much better performance compared to traditional converters like diode rectifiers and square-wave control inverters [4]. Like the phase multiplication technique, PWM control can raise the frequency of harmonic contents of current so as to reduce the effect caused by harmonics. Also, converters using PWM control can have high efficiency and small size. With all these advantages, PWM control absorbed great concern in modern power conversion systems. However, the topology complexity and difficult on designing controllers [19] makes the use of PWM is limited. 3.6 Power factor correction converter Power factor correction (PFC) converter is a typical active power factor correction method. As a mature technique for power factor correction, PFC converters have been widely used in power electronic systems to achieve high power factor (PF) and low harmonic distortion [33]. PFC convener forces the input current follow the input voltage, which makes the input current drawn from power supply nearly in a unity power factor [34]. The Boost-type PFC converters are the most used topology which have many advantages, such as low level ripple in the input current, high power factor, small size and simple circuit structure [35]. A typical circuit diagram of Boost-type PFC converter is as shown below from reference [36]. Figure 3.5 Typical circuit diagram of Boost-type PFC converter [36]. As we seen in the diagram before, conventional PFC converter consists two main stages [33] [37]: Power factor correction stage. This stage is combined with a diode rectifier and a DC/DC converter and used to correct power factor of the input current drawn from the power system. The most used type of chopper is Boost chopper. Also, the new Buck and Cuk type PFC converters are increasingly being used now. The switching working principle can be divided into two types, DCM and CCM. 2. DC/DC converter The chopper here is used to convert the power output voltage and current match the users demand. Since choppers only drawn low distortion power from supply, the typical filter on the utilization end is always a passive filter. This is the working principle for conventional PFC converters, the two-stage DCM/CCM Boost-type PFC converter. However, this type of PFC converter has some disadvantages and need to be improved [33]-[39]: 1. Stage number Individual control system and switching devices are required for each stage of PFC converter, hence increasing the costs of the whole system and cause some other problems, such as power density, transmission efficiency and control response [38]. Also, the design of control system can be a challenge. A new one-stage PFC converter topology has been introduced to power factor correction research area. The circuit diagram is as shown in figure 3.6 [36]. The combination of the power factor correction converter and the forward converter may bring many advantages point as below [36]: 1. High power factor correction performance 2. Reduced value of ripple in the DC output 3. Low initial cost and running cost 4. High efficiency and easy control system And so on. Figure 3.6 Circuit diagram of single stage PFC converter [36]. 2. Converter type Like shown in figure 3.6, Buck converter is increasingly being used in PFC converters. Also, Cuk converter and other type of choppers are becoming good choice for PFC converters [36]-[39]. The Buck type PFC converter was rarely used since its high input current distortion. However, with the characteristic improving of the Buck type PFC converter, it can reach good performance with specific dual mode duty cycle control scheme [36]. The main advantage of Buck type PFC converter is easy to reduce the stage number to one stage. 3. Devices and control strategy One of the most important aims in the design of power electronic systems is the reduction of the size of the passive devices, since it allows increase on the power density and the reduction in the initial and running cost. As inductor and capacitor are still using in the PFC converter, the reduction of them can be very important [33] [37]. However, the improvement of devices must base on the developing of the control strategy [37]. With a good detect and control system, the size of the inductor and capacitor can be reduced while the harmonic content can still meet the requirement [33]. The further analysis and improvement of PFC converter based on this literature review will be an important work in the last stage of project. 4. Conclusion This literature review provides a critical study on power factor issues and power factor correction techniques. A theoretical review of power factor definitions and harmonic generation by power electronic systems are presented at the beginning of the paper. The performance of five basic types of harmonic mitigation techniques has been discussed with the support of many previous research publication and their results. The PFC converter is chosen as the promising system for power factor correction after the analysis and comparison. The simulation model establishment and simulation comparison of power factor correction techniques will be important works for the next period of the project. Also, design rules and guidance of PFC converters will be designed in the next period, too.

A Child Labour In India Children And Young People Essay

A Child Labour In India Children And Young People Essay Child labour is undoubtedly a human rights issue. It is not only exploitative but also endangers childrens physical, cognitive, emotional, social, and moral development. It perpetuates poverty because a child labour, deprived of education or healthy physical development, is likely to become an adult with low earning prospects.[1]This is a vicious cycle which apart from ruining the lives of many results in an overall backwardness in the masses. Moreover, conceptualising child labour as a human rights issue gives the victim with the authority to hold violators liable. Human rights generate legal grounds for political activity and expression, because they entail greater moral force than ordinary legal obligations. Children are right holders with the potential to make valuable contributions to their own present and future well being as well as to the social and economic development of the society and thus they should under no circumstances be perceived as passive and vulnerable. Today, traditionally prescribed interventions against child labour which were welfare based like providing a minimum age for work are being replaced by rights-based approach. A rights-based approach to child labour needs to be adopted which puts internationally recognized rights of children to the center while utilizing UDHR, ICCPR and ICESCR as a supportive framework. Child labour is a condition from which the children have a right to be free and it is not merely an option for which regulating standards must be devised. In this paper we shall firstly trace the slow orientation of child labour laws to include human rights perspective internationally, and then evaluate current Indian laws and policies from a human rights perspective II. A Human rights approach to child labour Initially, scholars were unsure over extending human rights to children.[2] For instance, the 1948 Universal declaration of Human Rights (UDHR) emphasises that everyone is entitled to all rights and freedoms set forth in the declaration but makes no age qualification to the same. So it is unclear whether it extends to children. However, Art.4 of UDHR has been interpreted as prohibiting exploitation of child labour by interpreting servitude to include child labour.[3] In addition, Articles 23 and 26 of the United Nations Universal Declaration of Human Rights seek to guarantee just and favorable conditions of work and the right to education, both of which are violated constantly and globally through the exercise of the worst forms of child labor. In 1966 the International Covenant on economic, social and cultural rights (ICESCR) and International Covenant on civil and political rights (ICCPR) took significant preliminary steps towards modifying human rights according to age, by defining childhood as a state requiring special protection, with rights distinct to those of adults.[4] Even so it was not until 1989 that the Convention on Rights of Children (CRC) clearly spelt out the rights of the child while giving them a special status apart from the adults. Thus, it should not be surprising that early international legal efforts to address child labour tended to be abolitionist in tone and treated as an aspect of labour market regulation.[5] Next, a prioritization approach was adopted where concentration was on the more abusive forms of child labour. So the ILO adopted Convention 182 on the Worst Forms of Child Labor, 1999, aimed at the immediate elimination of intolerable forms of child labor. The convention requires signatories to work with business groups to identify hazardous[6] forms of child labor and introduce time-bound programs for eliminating them. Conventions 138 and 182 are recognised as core International Labour Organization (ILO) conventions but unfortunately human rights groups have done much to criticise it. They argue that this artificial division of hazardous and non-hazardous forms of child labour is artificial and made only for the benefit of labour regulations. Child labour in any form is very harmful and exploitative for the children.[7] Secondly, child labour, as defined by ILO is work done by children under the age of 12; work by children under the age of 15 that prevents school attendance; and work by children under the age of 18 that is hazardous to their physical or mental health. It is an economic activity or work that interferes with the completion of a childs education or that is harmful to children in any way.[8]Such an age based classification is incongruous and is behind time.[9] The right to a childhood cannot be replaced by placing such age barriers which imply at least some work could be done by children at even age 12! Where is the best interest of child seen in such laws? Fortunately, a human rights approach to child labour was soon adopted by Convention on Rights of the Child (CRC) in 1989. Such rules focus not only on the avoidance of harm to children but as well, on regulation of employment relationship in which working children find themselves and beyond that, on rights of children to education and to participate in decisions that affect their lives, including those related to their employment. This holistic view of child labour as only a part of a childs life is principally what sets human rights approach apart from the labour regulation approach.[10] However, some critique of CRC feel that categorizing child labour as a special category has trivialized their rights and have made them weak and in need of an adult advocate. Conversely, the defenders of CRC argue that it is through this classification that children gain more rights with legally recognized interests which are specific to their stage in life cycle. The slavery convention, 1926 and Supplementary convention on abolition of slavery, the slave trade, institutions and practices similar to slave trade, 1956 entered into force in 1957 prohibits slavery like practice under Art 1. In recent times Child labour has been read as a slave like practice as it involves economic exploitation. Since children are more vulnerable than adults and are dependent on their parents, it can be assumed that when they are economically exploited by their parents or by their consent, the decree of dependency necessary for work to b qualified as slavery like practice will be attained in most cases. In the light of ICCPR (art 8(2)) and Supplementary convention on abolition of slavery, the slave trade, institutions and practices similar to slave trade, 1956, Art.4 of UDHR should be interpreted as prohibiting exploitation of child labour as child labour comes under servitude. Child labour also comes under the term forced or compulsory labour in Art.8(3) of ICCPR. The obligations of state parties under art 8 are immediate and absolute. Thus state parties have to prevent private parties from violating child labour norms. Art 24, ICCPR obliges the state to protect children from economic exploitation. III. Convention on rights of child United Nations Convention on the Rights of the Child is the first legally binding international instrument to incorporate a full range of human rights such as civil, cultural, economic, political and social rights for children. The Convention offers a vision of the child as an individual and as a member of a family and community, with rights and responsibilities appropriate to his or her age and stage of development. By recognizing childrens rights in this way, the Convention firmly sets the focus on the whole child. The Convention under Art.32 speaks of economic exploitation of children by making them perform work that is likely to be hazardous or to interfere with the childs education, or to be harmful to the childs health or physical, mental, spiritual, moral or social development. The Convention spells out a childs right to education[11], as well as identifying the forms of harm to which children should not be exposed. Other rights given to children include right to the enjoyment of the highest attainable standard of health and to abolish traditional practices that are prejudicial to childrens health (Article 24), a right to a standard of living adequate for the childs physical, mental, spiritual, moral and social development; parents have the main responsibility for this, but governments are required within their means to assist parents, as well as to provide material assistance and support in case of need(Article 27) and a right to rest and leisure, to engage in play and recreational activi ties appropriate to the age of the child. Article 22 specifies that refugee children have the same rights as all other children. Article 6 of the convention makes it the obligation of the governments to ensure that children are able to survive and develop to the maximum extent possible while Article 11 urges governments to prevent the illicit transfer and non-return of children abroad. Under Article 19, Governments must take action to protect children against all forms of physical or mental violence, injury, abuse, neglect, maltreatment or exploitation, including sexual abuse[12] and must provide special protection and assistance to children who are deprived of their own family environment under article 20. Article 35, requires governments to take action to prevent children from being trafficked while articles Article 36 and 39 requires governments to protect children against all other forms of exploitation prejudicial to any aspects of the childs welfare and to help children recover from exploitation, neglect or abuse (particularly their physical and psychological recovery and return and reintegration into th e communities they come from). Two other provisions in the Convention are also vitally important for working children. Article 3 says government agencies and other institutions taking action concerning a child or children must base their decisions on what is in the childrens best interests. Article 12 emphasises that when a child is capable of forming his or her views, these should be given due attention, in accordance with the childs age and maturity. Other conventions of interest include Optional protocol to the convention on rights of child on sale of children, child prostitution and child pornography and Optional protocol to the convention on rights of child on the involvement of children in armed conflict both adopted in May, 2000. IV. India and its International commitments India has ratified six ILO conventions[13] relating to child labour but have not ratified the core ILO conventions on minimum age for employment (convention 138) and the worst forms of child labour, (convention 182) recognised as the core conventions at the international labour conference which makes it mandatory for the international community to follow certain standards in their crusade against child labour. Nevertheless, India has taken commendable steps to eliminate child labour. The recent right of children to free and compulsory education Act, 2009 and the preceding 86th amendment exemplifies the same. Furthermore, the passing of Juvenile Justice (care and protection) Act, 2006 shows Indias commitment to a human rights approach to child labour. The Act emphasises on looking into the best interests of the child and allows for social reintegration of child victims. In such a scenario India not signing the core labour conventions does not make a difference in the fight against child labour. India is a party to the UNdeclaration on the Rights of the Child 1959. India is also a signatory to the World Declaration on the Survival, Protection and Development of Children. More, importantly India ratified the Convention on the Rights of the Child on 12 November 1992.[14] Other important international initiatives against child labour include the adoption of the first Forced Labor Convention (ILO, No. 29), 1930, Stockholm Declaration and Agenda for Action: States that a crime against a child in one place is a crime anywhere, 1996, establishment of 12 June as the World Day Against Child Labor in 2002 by ILO and the first global economic study on the costs and benefits of elimination of child labour.[15] V. Indian laws on child labour The present regime of laws in India relating to child labour are consistent with the International labour conference resolution of 1979 which calls for combination of prohibitory measures and measures for humanising child labour wherever it cannot be immediately outrun.[16] In 1986 Child labour (Prohibition and regulation) Act was passed, which defines a child as a person who has not completed 14 years of age. The act also states that no child shall be employed or permitted to work in any of the occupations set forth in Part A or in the process set forth in Part B, except in the process of family based work or recognised school based activities. Through a notification dated 27 January 1999, the schedule has been substantially enlarged to add 6 more occupations and 33 processes to schedule, bringing the total to 13 occupations and 51 processes respectively. The government has amended the civil service (conduct) rules to prohibit employment of a child below 14 years by a government employee. Similar changes in state service rules have also been made. The framers of the Indian Constitution consciously incorporated relevant provisions in the constitution to secure compulsory primary education as well as labour protection for children. If the provisions of child labour in international conventions such as ILO standards and CRC are compared with Indian standards, it can be said that Indian constitution articulates high standards in some respects The constitution of India, under articles 23,24, 39 ( c) and (f), 45 and 21A guarantees a child free education, and prohibits trafficking and employment of children in factories etc. The articles also protect children against exploitation and abuse. Equality provisions in the constitution authorises affirmative action policies on behalf of the child. The National child labour policy (1987) set up national child labour projects in areas with high concentration of child labour in hazardous industries or occupations, to ensure that children are rescued from work and sent to bridge schools which facilitate mainstreaming. It is now recognised that every child out of school is a potential child labour and most programs working against child labour tries to ensure that every child gets an education and that children do not work in situations where they are exploited and deprived of a future. Similarly, there are other programmes like National authority for elimination of child labour, 1994 (NAECL) and National resource centre on child labour, 1993 (NRCCL). Recently, government of India notified domestic child labour, and child labour in dhabas, hotels, eateries, spas and places of entertainment as hazardous under the child labour (prohibition and regulation) Act, 1986, effective from 10-10-2006. National human rights commission has played an important role in taking up cases of worst forms of child labour like bonded labour. In 1991 in a silk weaving village of Karnataka called Magdi it held an open hearing which greatly sensitised the industry and civil societies. It also gave rise to new NCLP programmes.[17] VI. Judicial reflections Judiciary in India has taken a proactive stand in eradicating child labour. In the case of M.C. Mehta v. State of Tamil Nadu and Ors[18], this Court considered the causes for failure to implement the constitutional mandate vis- ¿Ã‚ ½-vis child labour. It was held that the State Government should see that adult member of family of child labour gets a job. The labour inspector shall have to see that working hours of child are not more than four to six hours a day and it receives education at least for two hours each day. The entire cost of education was to be borne by employer. The same was reiterated in Bandhua Mukti Morcha v.UOI[19] and directions were given to the Government to convene meeting of concerned ministers of State for purpose of formulating policies for elimination of employment of children below 14 years and for providing necessary education, nutrition and medical facilities. It was observed in both the case that it is through education that the vicious cycle of poverty and child labour can be broken. Further, well-planned, poverty-focussed alleviation, development and imposition of trade actions in employment of the children must be undertaken. Total banishment of employment may drive the children and mass them up into destitution and other mischievous environment, making them vagrant, hard criminals and prone to social risks etc. Immediate ban of child labour would be both unrealistic and counter-productive. Ban of employment of children must begin from most hazardous and intolerable activities like slavery, bonded labour, trafficking, prostitution, pornography and dangerous forms of labour and the like.[20] Also, in case of PUCL v. UOI and Ors[21] children below 15 years forced to work as bonded labour was held to be violative of Article 21 and hence the children were to be compensated. The court further observed that such a claim in public law for compensation for contravention of human rights and fundamental freedoms, the protection of which is guaranteed in the Constitution, is an acknowledged remedy for enforcement and protection of such rights. However, Human rights experts criticise the scheme of payment of compensation envisage in Child labour act and further adopted by the Judiciary with gusto.[22] They say that monetary compensation is like washing away ones conscious which still believes that if a child labour is sent to school he must be compensated for the amount which he might have got if he had worked instead. This only confuses the already divided opinion of the society today which still thinks that poor and needy children are better off working. VII. Conclusions India has done well in enacting suitable legislations and policies to combat child labour. Nonetheless, its implementation at grass root level is very much lacking. The child labour laws today are like a scarecrow which does not eliminate child labour but only shifts it geographically to other places, to other occupations like agriculture which may be less paying or it might be still continued clandestinely.[23] The lack of a specialised enforcement officer leads to lesser attention being given to child labour legislations. Furthermore, many of the child labour programmes remain poorly funded. Child labour is a complex problem which cannot be eliminated without first attacking it at the roots. Thus, poverty, unemployment, lack of social security schemes, illiteracy and the attitude of society need to be tackled first before any progress can be made. A starting point can be to treat Child labour as a human rights problem and discouraging its manifestation in any form. If the society as such sees child labour as a social malaise, we will be much closer at achieving success. Lastly, there is a lot of debate over the age from which child labour should be banned. The ILO conventions do not give a definite age, 14 years seems to be the general understanding but CRC defines a child to be below 18 years. Right to education is for children below 14 years and Child labour is prohibited till age of 14 years. This brings the question as to whether children of age 14-18 years are to be denied basic human rights and are to be left vulnerable.

Simple Voltage and Current Measurement :: essays research papers

Experiment I Simple Voltage and Current Measurement Objective The objective of this experiment was to measure the Voltage and Current. Upon completion of this experiment I was able to: 1)  Ã‚  Ã‚  Ã‚  Ã‚  Set the DC power supply to a specific voltage. 2)  Ã‚  Ã‚  Ã‚  Ã‚  Properly connect the voltmeter to measure voltage. 3)  Ã‚  Ã‚  Ã‚  Ã‚  Measure current with the ammeter. 4)  Ã‚  Ã‚  Ã‚  Ã‚  Measure resistance with the ohmmeter. 5)  Ã‚  Ã‚  Ã‚  Ã‚  Determine the accuracy of a given meter reading. Theory The theory required for this experiment was an understanding of Ohm’s Law. Ohm’s Law is the algebraic relationship between voltage and current for a resistor. Resistance is the capacity of materials to impede the flow of current or electric charge. Ohm’s Law expresses the voltage as a function of the current. It was also necessary that the concept of measurement accuracy be understood. This is discussed below. Accuracy is of primary importance in an experimental work. The tolerance quoted by the meter manufacturer allows us to calculate the accuracy of any reading taken with that particular meter. For example, assume that the dc voltage scale on a particular multimeter is rated at  ± 3% of full scale. This means that a reading on the 10V scale is accurate to ( ± 0.03%)(10) =  ± 0.3V. Thus, a reading of 9V on the10V scale indicates a true voltage, which lies between 8.7 and 9.3 V. A reading of 1V on the scale would indicate a true voltage between 0.7 and 1.3 V. At this point, the error is  ± 30%! Any reading less than 10% of full scale should be viewed with suspicion since most meters are very inaccurate n this range. Circuit Diagrams For this experiment we used a Power supply source, voltmeter/ammeter/ohmmeter. Fig 1.1 Power Supply and voltmeter in parallel Power Supply  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Voltmeter - Fig 1.2 Simple voltage measurement circuit. a  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  a b  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   a  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   b  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  a a d   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   c  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   c  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   d c  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   d   Ã‚  Ã‚  Ã‚  Ã‚  Fig 1.3 Simple current measurement circuit Power Supply (Be sure current   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   I control is at maximum setting)   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Fig 1.4 Circuit to measure resistance   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Procedure To measure the voltage output of the power supply, we connected the voltmeter as shown in Fig. 1.1. We made sure that the voltmeter is always connected in parallel with the voltage being measured. Before turning on the power, we set the voltmeter voltage range to a DC value higher than the highest voltage we expected to measure. This precaution must be observed with all meters in order to avoid the possibility of burning out an expensive instrument. We then set the current control to maximum current and adjust the output voltage of the supply to values of 2.5, 10, and 15.

The Battle Between Heart and Conscience in Mark Twains Huckleberry Fin

The Battle Between Heart and Conscience in Mark Twain's Huckleberry Finn  Ã‚  Ã‚  Ã‚  Ã‚   Society can have a huge impact on an individual's moral growth. Sometimes the impact is positive but other times the learned habits and set morals of society have a negative effect. In Mark Twain's novel, The Adventures of Huckleberry Finn, the main character, Huck, struggles with what society teaches him and with what he knows to be good and true. During different conflicts concerning either the king and duke, various women or Jim, Huck's sound heart wins the battle over his conscience, which the reader knows to be ill-formed. Right from the first time Huck hears the story of the king and duke's amazing pasts Huck knows, "these liars warn't no kings nor dukes at all" (Twain 166). However, Huck also does not want to make any trouble so he goes along with the lie. Society may have taught Huck's conscience that lying is wrong but in this case the truth would have caused unnecessary danger and havoc. Another time that Huck sees right through the king and duke, is during the Wilks' inheritance situa...