The Impact of Leader Behaviors on Group Functioning Essay

The Impact of Leader Behaviors on Group Functioning - Essay Example When a leader is chosen or appointed, the focus shifts from himself to the others making him much more focused on the external and results than the self or trying to seek comfort (Quinn, 2005). This is what makes the leader much more democratic than autocratic. When an individual becomes emotional while in the leadership position, they tend to shift their focus from others and bring it back to their own affairs. They try to seek the solution that will bring them much more comfort and hence the thought pattern is internal which comprise the characteristics of an autocratic leader. When the leader starts turning attention to him and making the solutions and decisions that bring him comfort in lieu of results, then the group members start suffering from lack of independence and participation. They lack inclusivity in decision making and this may weaken the ties of the group rather than make them

Constitution Cafe Essay Example for Free

Constitution Cafe Essay The Constitution Cafe written by Christopher Phillips is mainly about the viewpoints of students around the country and what could be different about the Constitution. While the majority of the students from the meetings feel like there should be a few things added to the articles of the Constitution, because things are different today than when it was first written in 1787. The book informs the readers on the basics of our rights and understanding more about the Constitution itself. There are many issues discussed such as immigration, justice for all, rights, money matters but I’ll only be going over a few of these issues. One argument Phillips discusses is the number of refugees who immigrate to the United States. There are a few students in the meeting that admit to be refugees, and are trying to support their families who are back in Mexico. They argue how it’s not right for Mexico president and leaders who are able to fly over into other countries in their private jets, but immigrants like Ricardo would end up getting killed for trying to find work in the U.  S. â€Å"We never had rights in Mexico, though our homeland’s constitution says we all have equal rights,† says Oscar (p. 112). Although they don’t have any rights in the U. S. , they still find a way to work harder than most citizens and will do anything to provide the best life for their families. I strongly agree with the Constitution Cafe Article the students wrote in which they want the Constitution to change, because most refugees who come to the U. S. want to have rights and live life without worrying about getting deported back to Mexico. Many Americans say immigrants shouldn’t be allowed if they weren’t born in the U. S. and call them names such as ‘wetbacks’ but some take that as a compliment since their backs are wet, because they work the hardest. Another argument the author addresses is with a few junior high school students who agree that every U. S. citizen when they turn the age eighteen should receive an equal lump sum payment of at least $50,000. 00. The students say you should only be able to keep the money if you’re doing good and spending it on well needed things. Sure, a few people will take advantage of their big payday and do nothing good with their lives if they don’t have to. But I’m betting most will make the most of this opportunity† (p87). We all know once you turn eighteen then you could be on your own and spend the money on unnecessary things. This is why I don’t agree with the students, and some points I can relate to like for instance some parents aren’t able to provide much so the money could help the family. I also see it as the population would sky rocket because everyone would have kids for the money once they turn eighteen. Life isn’t that easy just to have a huge payment waiting for you. It’s not fair to the ones who are over the age of eighteen and had to work hard for all that they have and didn’t just have $50,000 handed to them. A question I have for the students would be, â€Å"where the money would be coming from? † This is a very good argument, because any parent wants a good future for their child and especially if the money goes to college tuitions. Finally, the last argument that caught my attention is scout’s honor that the president should have to live by before becoming president of the U.  S. They argue about how easy it is to be president when all they ask for is you have to be thirty five years old and have resided in the U. S. at least fourteen years. A group of boy scouts say the president didn’t have to be a boy scout when he was younger but should promise to be trustworthy, loyal, helpful, friendly, courteous, kind, obedient, cheerful, thrifty, brave, clean, and reverent. Our next president could have been in a gang or committed some type of crime and they would still win the president election. The citizens want someone who will be role model to all ages and prove by his/her actions, not just words. â€Å"This article may be about the ideal qualities we want in a president, but most of all, if you read between the lines, it’s really about the ideal qualities we want in ourselves† (p105). Arturo statement is true because we all want to be perfect but we all mistakes and so will the president, but at least there’s one person who will have all the qualities that we need to run the U. S.  This one argument I strongly agree with from the beginning all the way to the end with the written Constitution Cafe Article. A president should give their full duty to our country and of course believe in God. Christopher Phillips message would have to be getting his readers to understand what our Constitution is all about and there could be changes to it every day in life by anyone but it has to get approved of course. Thomas Jefferson believed that Americans should rewrite the Constitution every twenty years to meet our current needs in the generation we live in today. This is why Phillips has traveled the country asking Americans if and how they would rewrite our Constitution if given the chance. His main goal is to make the U. S. a better place and keep us all updated with the Constitution itself and hope from reading the book that we all learned something new about all the different arguments. From reading Constitution Cafe, I’ve learned so much more about the Constitution and the changes that have been made over years. I can definitely say now I know a lot about Thomas Jefferson than I did before, and all that he has done for the U.  S. From the many arguments in the book, I talked about a few and summarized what it was about. We should understand the basics of our rights, and if there’s something we want to make a change to in the Constitution we need to get together and write an article. All of the U. S. citizens will have different opinions on immigrants, rights, president qualities, money matters, and many more topics that relate to the Constitution. I can’t wait to read the part two of Constitution Cafe in the next twenty years, and to see what will change for the future generations.

Saint John Bosco :: essays research papers fc

John Bosco was born in Turin, Italy, on August 16, 1815. His parents were poor farmers, but his father died when he was two years old, but John was too young to know what happened, and it forced his mother, Margaret, to raise him along with 3 other children and taught them the importance of their faith. It was very hard for his mother so John went out and got a few little jobs to help his mother. He had many jobs like a carpenter, shoe-maker, a cook, a pastry maker, and a farmer. While growing up John wanted to become a priest. One night when John was a boy he had a dream that he led young boys; and when he awoke he realized his life's work was to help poor boys. Bosco also had many other dreams along with many others that directed him to help homeless boys. Bosco when he was young went to fairs and carnivals, and learned and mastered them when he got home and then kept the young people in his village occupied by doing magic tricks and acrobatic moves, and only ask prayers for paymen t. Also, he would speak to children about God, and even some adults occasionally. The seminary school that Bosco entered was Chieri at the age of 16. Father Cafasso helped John through seminary school because he could not afford it, neither could his mother help him pay for it. John became a priest in 1841 at the age of 26, and was named Don Bosco, which means Father Bosco. After Sunday Mass's he would have a catechism class which would teach young people about God. After a while the catechism class turned into a school were boys could receive a real education, not just a religion class. He was appointed chaplain of St. Philomena's Hospice for girls. John did not really like his job so he resigned and opened a house for boys, where he helped boys that he saw on the streets, and brought them to the house where he fed them, clothed them, and sheltered them. Then he started his own religious order of 17 priests and brothers, they were called the Salesians in 1859, after St. Francis de Sales. He then setup residences and schools to teach boys grammar and religion, and train them as shoemakers, tailors, and printers. By 1856, he had 150 boys and girls in residence and nearly 500 more in oratories throughout Turin.

How Geometry is used in Construction :: essays research papers

I have conducted my research through interview with someone familiar with construction and development as how geometry is used in these fields.   Ã‚  Ã‚  Ã‚  Ã‚  The first step to development is to survey the property in order to document and draw the bounds and land surface shapes. The property will be represented by various geometry elements such as points, lines, arcs, circles, and other defined geometry shapes. Surveyors use scope on tripods witch use projection of line Referenced point on a stick in order to measure the variations of the heights on the ground. This tool uses various angel theorems and postulates to find location of property boundaries, property corners, utilities and building layouts on the property. The surveyor uses the data collected to draw the property layout on a 36†x 24†sheet of paper.   Ã‚  Ã‚  Ã‚  Ã‚  After completion of this step the architects use the surveying drawing to develop a working drawing for the building. In these drawing you will see triangles, rectangles, squares, arches and other geometry shapes and forms to create their design. The architects through our history have used these shapes to create famous structures all over the world. If you go back to Roman historical sites you will see such examples like the great Coliseum. A great example can be seen is the famous Egyptian pyramid. Some other famous structures are the Eiffel Tower which is in Italy, and Chrysler building in New York. If you look around your neighborhood houses, you will see these shapes.   Ã‚  Ã‚  Ã‚  Ã‚  The structural engineers use geometry in their design in order to calculate the spacing of their columns and beams for proper strength for the building.   Ã‚  Ã‚  Ã‚  Ã‚  The construction phase would not be possible without the knowledge of basic geometry. Points, lines, measurements and angles are often used to lay out the building in accordance to the architect drawings.

Global Context of Modern Business Essay

China is believed to have the oldest continuous civilisation. China has over 4,000 years of provable history. Beijing is the capital of China and is the most important point for the country. The official language is standard Chinese, which is derived from the Mandarin language however most business people speak English. There are many dialects in China however there is only one written language. A communist form of government rules China. The Chinese government promotes atheism although the constitution guarantees freedom of religion. The Chinese practice a variety of religions however Confucianism; despite not being a formal religion is practiced widely throughout the country. China is the most densely populated county in the world with approximately 1. 3 billion people as of mid- 2008. Almost 100 percent of the population are ethnic or Han Chinese. There are strict rules regarding childbirth and each couple is limited to only one child. Opportunities There are lot of trade and investment opportunities for exporters in the China market. Some of the major sectors currently experiencing rapid growth are: processed food and beverages, gambling, transport, IT and telecommunications, minerals and energy, environment protection, building construction products and services. Three of the major growth industries though are the exporting of education, processed food and wine products. Education The foreign education sector in China is split in two – students studying abroad and foreign education service providers establishing a presence in Shanghai. The type of students interested in Australia includes those who desire pure language study and those who wish to study university degrees right through to post-graduate/MBA studies etc. As the cost of overseas study remains high, pursuing qualifications through foreign accredited institutions in China has become more practical and more popular. Course delivery can take two forms. One is the foreign school catering exclusively to expatriates, which can be wholly foreign owned and the investor need not be an education entity. The other is a co-operative arrangement or twinning with a Chinese institution where local students are the target markets. These schools are encouraged to provide vocational education. Foreign investors must have a Chinese partner who can lodge an application with the local education authorities for approval. Processed Food As Chinese become more prosperous, demand for more sophisticated products, with a greater emphasis on quality, convenience and freshness continues to grow. This means that significant unsatisfied demand for richly processed foods exists. There has always been a stable market for imported foods in China, especially in respect to hotels, bars and western style restaurants. Increasingly, Chinese consumers themselves are becoming to lay great stress on brand and brand loyalty than before. This means that companies with a strong international brand and aggressive marketing strategies continue to hold large market shares. Foreign companies that have been given permission by the Chinese government to set up supermarket chains include Yaohan, Wellcome, Parkson, Park ‘N Shop, Careful, Pricemart and CHC. These companies are setting up supermarkets in a limited number of locations. Wine Wine is especially popular in the large cities of China (Beijing, Shanghai and Guangzhou) and has great potential given the increasing disposable income of local people, the health benefits of drinking wine and the government campaign against grain-based alcoholic drinks. However, many Chinese have little knowledge of table wine, and few people can differentiate quality and appreciate the taste. With this in mind, and excellent promotional tool could be wine appreciation and information courses to educate food and beverage managers, restaurant owners and waiters. This would also attract high-income earners and may ultimately stimulate the consumption of quality wine. The Chinese wine market is price sensitive and consequently locally manufactured wine holds the largest market share. French companies are active in setting up joint venture either growing grapes and manufacturing wine or bottling bulk-imported wine. Better quality wine is limited to hotels and restaurants and consumed mostly by Western diners. To successfully sell wine in China, local bottling of bulk-imported wine is considered the most economical and practical way to supply the local market with a competitively priced product. The opportunities arise from rapid economic growth in the world’s largest market and the availability of a cheap manufacturing base from which to sell to China and the world. From a manufacturing perspective, China in the long run will be distinguished by its overall business strength and structure, including the huge investments made to ensure China has a modern competitive manufacturing sector. All businesses need to be clear about whether they want to sell or manufacture in China. Long-term, China business strategies should not be based on the availability of cheap labour – this is disappearing as China becomes wealthier. The number of high net-worth individuals on the Chinese mainland has hit a record high and they are continuing to spend, according to the Hurun 2009 Wealth Report. The study found 825,000 mainland Chinese – or one in 1,700 – with a personal wealth of at least US$1 million. And now the rich are more likely to be found in second- and third-tier mainland cities. A new generation of consumers is emerging in China – they are young, well educated and familiar with non-Chinese cultures. This ‘Y generation’ of 240 million, born between 1980 and 1990, is now the highest earning age group in the country and is looking for a new way of life. They typically live in the major cities on the Eastern seaboard of China and in particular in Beijing, Shanghai, Shenzhen and Guangzhou where GDP per person is now over US$5,000 but corresponds in Purchasing Power Parity terms to four times that amount. Challenges Starting to do business in China is likely to be more costly and time consuming than in other markets. Challenges arise because of China’s size, its gold rush style growth and the fact China has a very different business culture and environment from what businesses in other countries are used to. China is different in size, culture, politics, geography, history and economic structure. These issues can present challenges for companies looking to sell or invest in China which can only be overcome by thorough research, spending a lot of time in-market and following a focused business plan. Language and culture barriers The main challenges of doing business in China would be language and culture barriers. Before you visit China, it will be a definitely good idea to prepare yourself by studying aspects of Chinese language, culture, history, and geography. Your hosts will appreciate your initiative. If you speak Chinese, they will really appreciate your efforts and take your initiative of doing business in China more seriously than if you do not speak any of their language. Moreover, your ability of being able to understand Chinese language will help you to establish a successful business. It is essential for the foreign-funded enterprises to understand the China’s culture, especially regarding the culture of Guangxi (relationship), so as to be able to gain the popularity and trust of China population. With a good relationship, business can become smoother and probability of failure will be greatly reduced. Stronger bonds can also be built with the customers, suppliers and partners. In China, Guangxi is a complicated field. A special feature of doing business in China will be that Guangxi will have to include relationship with the government body, investors, partners and even relationship with your own staff, so when doing business in China, it is important for foreign investors to learn to coordinate with the China government, especially establishing good relationship with government bodies dealing with foreign trade and economic cooperation. Government procedures Governmental procedures for foreign investors in establishing investments in China is extremely complicated, thus if one is unfamiliar of the procedures, one will delay his business opportunities. Therefore it is important for one to be familiar with the investment procedures before carrying out his investment in China. A safer and more appropriate way will be to seek help from local organisations familiar in the same field of business or consultant firms who are able to provide professional advice and assistance. Determination and patience may be essential for an investor to be successful, however it is necessary for one to require help from professional bodies to ensure that success will be achieved. Conclusion China’s labour market very much appeals to many foreign investors. This is because on one hand, labour cost is low, and on the other hand China’s workforce has become matured and their skills have been constantly upgraded, especially in the coastal cities. Educational development is undergoing at a wonderful pace in China, thus it is no longer difficult to hire high quality labour force in China today. Many successful foreign investors have even credited their success in China to their China’s local staff. One big problem that is causing headache to foreign investors is how to maintain good relationship (Guangxi) with the local staff. First of all, top management should cultivate the company’s vision and values into the employees because what the local people are taught under China’s educational system may crash with the foreign management system. Thus only by letting the employees understand the company better can allow the company to function better.

Verb Conjugation Instructions for ESL Students

Verb Conjugation Instructions for ESL Students Learning how to conjugate verbs in English is not as difficult as many think. The key to learning how to conjugate verbs in English is to focus on how to conjugate the auxiliary verb. What are auxiliary verbs? Auxiliary verbs are also called helping verbs. They are verbs that help the main verb. All tenses in English conjugate using an auxiliary verb. Only the present simple and the past simple in the positive form takes no auxiliary verb! Follow these easy steps on how to conjugate verbs, and youll conjugate verbs in English with ease. Learn how to identify the main verb in a sentence. Verbs express what someone or something does. Look for the verb that expresses the action of the sentence.Decide on when the action takes place. Does it take place in the present, the past, or the future?Once you have discovered the general time, find out the specific time. Is the action happening at the moment? Does the action happen every day? Has the action happened up to a point in the past, present or future?If the action happens regularly or is a habit, use the present simple verb form: For example: He doesnt work on Saturdays. They play football after school. etc.If the action happens once in the past at a specific point in time, use the past simple. For example: They went to school when they were young. Did Mary visit you last week?If the action happens up to a point in time use a perfect form: present perfect, past perfect, or future perfect. For example: She has worked her for many years. They had finished lunch by the time he arrived. Mary will have finished the report by five pm. If the action is happening at a specific moment in time use a continuous form: present continuous, past continuous or future continuous. For example: She is working at the moment. They will be playing tennis at 5 pm. Tom was eating when she arrived.Now that you know WHEN the action happens, and in what time frame, learn your helping verbs. Present simple or past - do, perfect forms - have, continuous forms - be.Learn to conjugate the helping verbs: I, you, we, they do / she, he, it does | I am / you, we, they are | I, you, we have / he, she it hasLearn which form the main verb takes for each form. Simple forms verb without to (i.e. play, walk, eat, work, etc.). Continuous forms verb ing (playing, walking, eating, working, etc.) Perfect forms past participle (verb in the third form, i.e. bought, understood, played, etc.)Conjugate the verb. Here is the thinking process: 1) Whats the general time? - past 2) Whats the specific time? - at a specific moment 3) Aha! continuous in the pa st OR past continuous 4) conjugate the helping verb - She was 5) Use the continuous form of the main verb: doing 6) Conjugate the verb: She was doing Remember these simple steps: Time? Action Happening? Simple, Continuous or Perfect? Auxiliary verb? Main Verb? Conjugate Example 1 Time? PresentAction Happening? Up to the presentSimple, Continuous or Perfect? PerfectAuxiliary verb? haveMain Verb? liveVerb Form? livedConjugate We have lived here for ten years. Example 2 Time? FutureAction Happening? happening at a specific momentSimple, Continuous or Perfect? continuousAuxiliary verb? beMain Verb? watchVerb Form? watchingConjugate She will be watching TV at nine. Example 3 Time? PastAction Happening? one day in pastSimple, Continuous or Perfect? simpleAuxiliary verb? didMain Verb? playVerb Form? playConjugate Did you play the piano yesterday? Tips Be patient with yourself when learning how to conjugate verbs.Remember that the present simple and past simple do NOT take auxiliary verbs in positive forms.Changes occur in the auxiliary verb, not in the main verb EXCEPT for the present simple.

Personality Traits In Leaders Example

Personality Traits In Leaders Example Personality Traits In Leaders – Coursework Example Personality Traits in Leaders and ID Due paper Personality Traits in Leaders A leader is a person who leads and motivates his/her followers to achieve common goals (Kurtzman, 2010). This is exactly what Ellen Johnson-Sirleaf, the first female President of Liberia and the first female head of state of the continent, did to achieve her cause. All what Johnson-Sirleaf has achieved is due to her continuous struggle and motivation to do something for her country. Her development of leadership skills and struggle are based on various issues that her country was facing for a long time. These issues included poverty, violence, civil war, crimes, and a limited number of educational and job opportunities for the citizens. Johnson-Sirleaf has been a figure of hope and conviction for the whole nation since she has come into power. She has taken extraordinary steps since she came into power to bring a economic and social revolution in Liberia. She also believes that with continuous struggle and p assion a country can achieve everything to become a successful nation.I think the leadership skills of Johnson-Sirleaf are a guideline for every person to become a successful leader. She has earned the name of ‘iron lady’ due to her long-time struggle for a great cause. The personality traits that have earned Johnson-Sirleaf this name include passion, intrinsic motivation, continuous struggle, and an urge to help people and the country despite of all hardships. Johnson-Sirleaf is a leader who can inspire everyone belonging to the field of public administration. Public administrators make efforts to address public issues by overcoming the underneath challenges (Cropf, 2008). Looking at this perception, there are hardly any negative implications for public administrators that demonstrate the personality traits of Johnson-Sirleaf. However, there are a lot of positive implications of showing these traits some of which include positive public image, positive return for effor ts, and development of a strong personality.ReferencesCropf, R. (2008). American public administration: public service for the 21st century (1st ed.) New York, NY: Pearson Longman.Kurtzman, J. (2010). Fitting in: The foundation for successful leaders. Leader to Leader, 2010(58), 17-21.

CTL Brainstorming Day 2013

CTL Brainstorming Day 2013 On November 1, 2013, more than 150 career professionals from 6 countries met for the annual Career Thought Leaders’ Global Career Brainstorming Day to discuss best practices, innovations, trends, and other factors currently impacting global job search and career management. I am pleased to write about their findings, just as I have for the last 3 years! Resumes are not dead! Even if you get your foot in the door with LinkedIn or an Executive Bio, your resume will still be a key part of your job search process. You absolutely must show a recruiter, in no uncertain terms, how you will solve their client companies’ problems. And you’ll need to make your great impression in not 15 or 20 seconds, but six (6)!! Here are the top 10 takeaways I’d like to share for resumes in 2014: Focus on your most current position. Many people reading resumes do not even look past that first position, so capture their attention right away! Remember that many recruiters are reading resumes on their phones, so make them mobile-friendly (there are applications available to create mobile-friendly resumes). Go for succinctness and clarity of direction, especially in your personal branding. Less is more. That means no 5-6-line summary paragraphs! Include quotes/testimonials on your resume – these tidbits are even easier to collect now that LinkedIn recommendations are so commonly given. Create multiple versions of your resume – for email, mobile, social media profiles, and yes, one on paper for networking and interviews. In most cases, keep your resume to 1-2 pages. Of course there are exceptions to this rule. In Europe, you may still include a photo, birth date and information about your familial relationships on your resume (Do NOT do this in the U.S., the U.K. or Australia). Generally, the U.S.-style â€Å"multinational† resume is becoming the norm. Be sure to have an ATS-friendly resume available for on-line applications. You might want one resume that works for both humans and ATS systems, or you might choose a format that works for both. Consider creating an infographic resume, which is a rising trend. Twitter resumes, video clips and other multi-media presentations will also make you stand out from the competition. Snail mailing a resume can make a good impression! Do it in addition to emailing and submitting on line! Don’t be afraid to include hyperlinks on your resume. This is a great way to keep things concise while offering a portal into the depth of your experience. More and more, resumes are becoming an aggregation of social media, with less content in the resume itself. Wondering about LinkedIn? LinkedIn profiles are a complement to your resume, not a carbon copy. LinkedIn provides an opportunity to be more personal and engaging. As recommended in my e-book, How to Write a KILLER LinkedIn Profile, create a robust LinkedIn profile complete with multimedia presentations, projects and videos. And use your LinkedIn Summary to project your â€Å"motivation, passion and individuality.† For more detail about trends in a range of job search categories, please go to the full article, Findings of 2013 Global Career Brainstorming Day:   Trends for the Now, the New the Next in Careers. For last year’s report, see my article, Are You Up on the Top Resume Cover Letter Trends of 2012-2013? Were you surprised by any of the findings?   What did you learn?   Please share in the comments below.

Human Resource Management (case study) Essay Example | Topics and Well Written Essays - 1500 words

Human Resource Management (case study) - Essay Example Moreover, the furniture will be standardized and customer’s requirements will not be met because it can probably increase the cost. However, the company is not in a position to cope up with any unplanned change because it can’t afford any changes in the production process and the design of product due to the excessive cost of implementing the changes. Question 2: Based on your evaluation of the strategy approached by each organization what would be the most likely HR strategy? Answer: The working conditions and job descriptions will be fixed and rigid. The job descriptions will cover clearly defined tasks and responsibilities with no room for flexibility. The job duties will give little or no room for career progression to the employees because the tasks will require specialization in one specific area and the employees will not be able to learn new skills and abilities. The chances for training and development are extremely limited because the furniture is manufactured on basic standards which don’t require updating the skills. As a result, the performance appraisal will be done on efficiency and effectiveness of the employees. In other words, the employees will be evaluated on the quantity of items produced irrespective of quality. The wages of front line employees will be based on number of items produced each hour and bonus/rewards can be expected on overproduction. The salary structure of the employees will be competitive and company will pay at/below the industry standards. Efforts will be made to recruit cheap labors and the jobs of highly paid workers will be unsecured so that cost can be minimized and the supervisors will ensure that labor productivity is enhanced and employees don’t sit idle. Overall, a short term profit making approach is adopted. Question 3: Is this approach of linking Porter’s competitive strategy to HR strategy has its limitations? Evaluate what you consider these limitations can be. Answer: the porter’s competitive strategy is very generic and its approach is very limited and narrow. Porter says that the company should follow only one strategy at a time so that it doesn’t lose focus. On one hand, Benchill & Sons uses tight cost control to reduce prices but on the other hand, it needs to change its policies with the changing trends in the market and the economy. For e.g. the company can go for technological advancement or may be it can purchase raw materials form cheap countries like china or India, in order to reduce cost. However, this approach is very practical for non-profit organizations because their sources are limited but for benevolent owners this approach is not good for the reputation of the company. On the other hand, for profit making companies, the background of entrepreneur, the nature of industry, competitors, buying patterns of customers, technology and minimum standards set by ISO are important factors to consider before adopting any competit ive strategy. The best employment practice is to ensure better utilization of resources while not exploiting the workers, maintaining a fair quality standard and using relationship marketing approach to ensure repeat sales in order to beat the competitors. SPEKE FURNISHINGS Question 1: evaluate which of the Porter’

ERP Systems For Small And Medium Size Companies Research Paper - 1

ERP Systems For Small And Medium Size Companies - Research Paper Example Additionally, because of globalization an e-commerce arrangement bringing changes rapidly, and small and medium size businesses as well refurbish their industry. Since the sizes of corporations are growing with the passage of time. In this scenario, the traditional business practices would not be helpful for the organizations to adopt these changes as well as the disharmony among business and information systems in their corporation can happen. Thus, at the present, majority of businesses utilize of Enterprise Resource Planning (ERP) systems for improving business performance (Park & Lee, 2006) and (Turban, Leidner, McLean, & Wetherbe, 2005). This paper presents a comprehensive analysis of some of the important aspects of Enterprise Resource Planning (ERP) technology based platforms for the small and large size business organizations. In this prospect, this research will cover the analysis of various major ERP technologies, their corporate implementation and possible advantages and d isadvantages. This paper will discuss SAP business by design, SAP business One and SAP All-In-One, Oracle’s PeopleSoft and Microsoft ERP system. ERP systems for Small and Medium Size Companies Without adopting ERP technology based arrangements and systems large size corporations cannot survive in today’s ever-increasing competitive world. In fact, ERP technology based systems allow the large scale organizations to work as an enabler instead of a differentiator. Additionally, this difference is apparent in the fraction of big businesses making use of the ERP systems. In view of the fact that in only United States more than 90 % organizations make use of Oracle to manage their business functions. Thus, given the diffusion of ERP marketplace for large scale corporations, adequate client growth in the huge firm marketplace turns out to be minimal for ERP vendors. In this scenario, ERP software suppliers and their business partners are able to generate and uphold revenues b y offering support and upgrades however actual growth is possible by expanding their business into new marketplaces. In addition, with the implementation of ERP software into the business, corporate expansion requires, more and more efficient computing and networking facilities, rising significance of information usage inside companies, and continuously technically trained employees, however, the current ERP systems suppliers are currently focusing sales expansion on the small and middle sized business (SMB) marketplace. On the other hand, at the present, more and more small and middle sized businesses are gaining a competitive and information edge over their competitors by implementing latest ERP systems. Therefore, business sectors suggested by SMB’s have to now recognize the importance of ERP systems as their marketplace landscapes turn out to be growing competitive (Crumley, Fain, & McFadden, 2010). SAP Business One Application The SAP Business One system puts together th e entire fundamental business purposes across the business; comprising sales, financials, inventory, customer relationship management and processes

A Life-Span View Assignment Example | Topics and Well Written Essays - 1000 words

A Life-Span View - Assignment Example It is evidently clear from the discussion that the researcher’s life dates back when she was a little girl. She was a jovial and playful baby. The people around me were truthful which led to the elemental sense of my trustworthiness. The researcher depended on her mother and her father for care, comfort, and sustenance. By this time, the author’s relative comprehension of the world came from her parents, particularly her mother, and their interactions with her. The researcher’s parents’ regularity, warmth, and reliable fondness exposed her to a world ruled by the trust. There was no point in the author’s life that her parents failed to offer a secure surrounding to meet her basic need. Just like noted under Erikson’s Psychosocial Theory, this would have created mistrust which would have resulted in suspicions, lack of confidence, withdrawal and frustration to me. The researcher’s parents were the regular sources of comfort, food, love, which taught her to trust. As the author grew older, she started to choose clothes by herself. By the age of 3, the author had gained control over eliminative roles and would make choices in her life and explored the environment around her. Needless to say, her parents still provided a secure environment where the author would carry out her own activities at will. The researcher’s patients were patient and would wait to look at her choices and would correct her if I had gone wrong at some point. At this time of the researcher’s life, she had developed a strong interest in music and played with the radio. The author would put some loud music which her parents would control by informing her to reduce the high volume. The author was able to feed herself now and would wash her clothes and use the bathroom on her own. Between the age of 3 and 6 years, the author was imaging much. She would take on tasks just because she had been active. The researcher was slowly learning t he world around her and learning numerous basic principles. The researcher would tie her shoes and tie her school tie and would speak effectively with her parents without any problems. The author did not like being idle and would felt guilty if it happened. The author felt the urge to help her mother with her household chores. The author would also feel bad if she did something and was not productive as she had anticipated.

Significance Of Admission To Adult Acute Psychiatric Wards Dissertation

Significance Of Admission To Adult Acute Psychiatric Wards - Dissertation Example In general, the admission of patients within the acute psychiatric ward can strongly influence the prescription of Benzodiazepines and Z-hypnotics; including its long-term use. To protect the health and socio-economic welfare of people from the adverse health consequences of the wrong use of both Benzodiazepines and Z-hypnotics, it is necessary to increase the existing knowledge and skills of healthcare professionals when prescribing and/or administrating these two (2) particular psychotic drugs. In relation to the misuse or wrong prescription of Benzodiazepines and Z-hypnotics within the acute psychiatric ward, this study will seek to identify the danger of prescribing both Benzodiazepines and Z-hypnotics during the pre-admission, admission, and post-admission process across the Acute Psychiatric Hospitals and among the general practitioners (GPs). The main research question is â€Å"Is Benzodiazepine and Z-hypnotic prescribing influenced by admission to acute psychiatric wards?† The following sub-research questions will be used as a guide throughout the completion of the literature review: As a general rule, both Benzodiazepine and Z-hypnotics should be used in small quantities for a time period of 5 days to 4 weeks (NHS West Essex, 2012, p. 4). However, there are cases wherein these drugs are being prescribed to the patients for long-term use. Because of the adverse health consequences of misusing both Benzodiazepines and Z-hypnotics, a lot of patients can be admitted or re-admitted to psychiatric wards.

Nokia HR Essay Example | Topics and Well Written Essays - 1000 words - 1

Nokia HR - Essay Example Change in fact, is one of the mostly viewed elements for corporate success (Manfred and Vries 7). Apple for instance initiated social and economic change, which has become prior to its actual leadership in its industry and its actual redefinition of the digital age by its visionary leader, Steven P. Jobs (Markoff). With this move, the company is consistently alert to find out what their competitors are doing in order to protect its competitive advantage (McQuillen). Change remains constant in this world. Believe it or not, we need to change, either for the best or the other way around. The person in front of you today is convinced and is compelled to choose the former. We need to change for good! Look around you, and you will be able to see major changes in our industry. Where do you find us now? Are we heading towards the advancements or are we much left behind by our competitors? Where do we hold our competitive advantage? Ladies and gentlemen, a pleasant day to all! Nokia is one of the dream companies your new CEO hoped to work for before. And it is now a dream come true, but there are still many things left unfulfilled in that dream, for there is a need to involve you in it. Yes, you heard it. Your new CEO would not be able to completely achieve that dream without you. So starting today, let us dream together, and be part of what we must envision as the dream company in the future. It is not impossible to make Nokia that way. With all of you whom your CEO believes to be elemental in the achievement of that dream, together we can make things possible and once again, we could prove to this industry that we have something competitive enough within us that could remarkably spark for change. Technological advancement is imminent. We cannot completely hold our competitors to stop them from investing in technological advancements and changes. They are innovating possibilities, as they try to create needs for their actual product and

Significance Of Admission To Adult Acute Psychiatric Wards Dissertation

Significance Of Admission To Adult Acute Psychiatric Wards - Dissertation Example In general, the admission of patients within the acute psychiatric ward can strongly influence the prescription of Benzodiazepines and Z-hypnotics; including its long-term use. To protect the health and socio-economic welfare of people from the adverse health consequences of the wrong use of both Benzodiazepines and Z-hypnotics, it is necessary to increase the existing knowledge and skills of healthcare professionals when prescribing and/or administrating these two (2) particular psychotic drugs. In relation to the misuse or wrong prescription of Benzodiazepines and Z-hypnotics within the acute psychiatric ward, this study will seek to identify the danger of prescribing both Benzodiazepines and Z-hypnotics during the pre-admission, admission, and post-admission process across the Acute Psychiatric Hospitals and among the general practitioners (GPs). The main research question is â€Å"Is Benzodiazepine and Z-hypnotic prescribing influenced by admission to acute psychiatric wards?† The following sub-research questions will be used as a guide throughout the completion of the literature review: As a general rule, both Benzodiazepine and Z-hypnotics should be used in small quantities for a time period of 5 days to 4 weeks (NHS West Essex, 2012, p. 4). However, there are cases wherein these drugs are being prescribed to the patients for long-term use. Because of the adverse health consequences of misusing both Benzodiazepines and Z-hypnotics, a lot of patients can be admitted or re-admitted to psychiatric wards.

Work Bibliography Paper Research Example | Topics and Well Written Essays - 1500 words

Work Bibliography - Research Paper Example The fist is an official document that served as an imperial record of the confiscation of church property, and reveals the depth to which persecution took place, and the Roman Empire re-embraced the persecution of Christians. It also points to an even more systematic persecution than had happened before, where persecutions would only be carried out in cases where Christians were overt in their worship, and would refuse to deal with Roman authorities, or when a local Roman Official was incredibly intent in the persecution. The acceptance of the Church in the decades before Julian’s reign, however, pushed Christianity into public life. This meant that the rise of persecution struck more deeply at the now open Christianity than previous persecutions had at closeted Christianity. This article also outlines a letter from a man to his wife that indicates the kinds of small personal resistances that Christians attempted to undertake in the face of this new brutal oppression. Though t hey would not often stand openly against the state, according to this article, they also did not bend to that oppression, and attempted to resist in the small ways that were available to them. Harrison, J. R. 2002. Paul and the Imperial Gospel at Thessaloniki.  Journal for the Study of the New Testament  25 (1): 71-96. ... the creation of Bishops who would preside over a certain area, and made the travel of Christians from one area to another easier, as well as allowing the birth of Christian communities in areas where there had not been ones previously easier, because they had a mold and a model to follow. Furthermore, it indicates that this administrative copying of the Roman Empire also had a profound impact on the theology of the Christian Church, allowing for the deciding of theological issues through councils of Bishops, but also reducing the populism of the earliest church in favor of a more top-down, authoritarian religious practice. den Boeft, J., and D. H. Williams. 1996. Ambrose of Milan and the end of the Arian-Nicene conflicts.  Vigiliae Christianae  50 (3): 315. This text outlines the role of one of the most important early Bishops, Ambrose of Milan, in bringing to a close the Arian-Nicene conflict. Though the council of Nicene decided on an orthodoxy, declaring the Arian beliefs hete rodox or heretical, this did not stop the continuation of Arian practices. This was a pattern that emerged though many church councils, where the losing side would continue to act in the ways they had previously, especially if, as was the case with the Arian heresy, the heresy was geographically concentrated. The article argues that without strong defense of orthodoxy, as was provided by Ambrose of Milan, it is quite possible that Arian beliefs would have continued to flourish for many years after the Nicean council. It outlines the steps Ambrose took to defend orthodoxy as decided by the Council of Nicene. But it also complicates the historical memory of Ambrose of Milan somewhat, by demonstrating that he had substantial investment in defending the orthodoxy for reasons other than theological

Platos Apology Essay Example for Free

Platos Apology Essay Platos The Apology is an account of the speech Socrates makes at the trial in which he is charged with not recognizing the gods recognized by the state, inventing new deities, and corrupting the youth of Athens. Socrates speech, however, is by no means an apology in our modern understanding of the word. The name of the dialogue derives from the Greek apologia, which translates as a defense, or a speech made in defense. Thus, in The Apology, Socrates attempts to defend himself and his conductcertainly not to apologize for it. For the most part, Socrates speaks in a very plain, conversational manner. He explains that he has no experience with the law courts and that he will instead speak in the manner to which he is accustomed: with honesty and directness. He explains that his behavior stems from a prophecy by the oracle at Delphi which claimed that he was the wisest of all men. Recognizing his ignorance in most worldly affairs, Socrates concluded that he must be wiser than other men only in that he knows that he knows nothing. In order to spread this peculiar wisdom, Socrates explains that he considered it his duty to question supposed wise men and to expose their false wisdom as ignorance. These activities earned him much admiration amongst the youth of Athens, but much hatred and anger from the people he embarrassed. He cites their contempt as the reason for his being put on trial. Socrates then proceeds to interrogate Meletus, the man primarily responsible for bringing Socrates before the jury. This is the only instance in The Apology of the elenchus, or cross-examination, which is so central to most Platonic dialogues. His conversation with Meletus, however, is a poor example of this method, as it seems more directed toward embarrassing Meletus than toward arriving at the truth. In a famous passage, Socrates likens himself to a gadfly stinging the lazy horse which is the Athenian state. Without him, Socrates claims, the state is liable to drift into a deep sleep, but through his influenceirritating as it may be to someit can be wakened into productive and virtuous action. Socrates is found guilty by a narrow margin and is asked to propose a penalty. Socrates jokingly suggests that if he were to get what he deserves, he should be honored with a great meal for being of such service to the state. On a more serious note, he rejects prison and exile, offering perhaps instead to pay a fine. When the jury rejects his suggestion and sentences him to death, Socrates stoically accepts the verdict with the observation that no one but the gods know what happens after death and so it would be foolish to fear what one does not know. He also warns the jurymen who voted against him that in silencing their critic rather than listening to him, they have harmed themselves much more than they have harmed him.

Delta Modulation And Demodulation Computer Science Essay

Delta Modulation And Demodulation Computer Science Essay A modem to improve communication system performance that uses multiple modulation scheme comprising modulation technique and encoder combinations. As communication system performance and objective change, different modulation schemes may be selected. Modulation schemes may also be selected upon the communication channel scattering function estimate and the modem estimates the channel scattering function from measurements of the channels frequency (Doppler) and time (multipath) spreading characteristics. An Adaptive sigma delta modulation and demodulation technique, wherein a quantizer step size is adapted based on estimates of an input signal to the quantizer, rather than on estimates of an input signal to the modulator. A technique for digital conferencing of voice signals in systems using adaptive delta modulation (ADM) with an idle pattern of alternating 1s and 0s has been described. Based on majority logic, it permits distortion-free reception of voice of a single active subscriber by all the other subscribers in the conference. Distortion exists when more than one subscriber is active and the extent of this distortion depends upon the type of ADM algorithm that has been used. An LSI oriented system based on time sharing of a common circuit by a number of channels has been implemented and tested. This technique, with only minor changes in circuitry, handles ADM channels that have idle patterns different from alternating single 1s and 0s. This method used for noise reduction. The modulator factor does not require a large amount of data to be represented. Representation is based upon a frequency domain function having particular characteristics. A preferred embodiment of the invention incorporates transform or sub band filtered signals which are transmitted as a modulated analog representation of a local region of a video signal. The modulation factor reflects the particular characteristic. Side information specifies the modulation factor 1.2. Aim: Digital techniques to wirelessly communicate voice information. Wireless environments are inherently noisy, so the voice coding scheme chosen for such an application must be robust in the presence of bit errors. Pulse Coded Modulation (PCM) and its derivatives are commonly used in wireless consumer products for their compromise between voice quality and implementation cost. Adaptive Delta Modulation (ADM) is another voice coding scheme, a mature technique that should be considered for these applications because of its bit error robustness and its low implementation cost. Bandpass modulation techniques encode information as the amplitude, fre ­quency, phase, or phase and amplitude of a sinusoidal carrier. These band ­pass modulation schemes are known by their acronyms ASK (amplitude shift keying), FSK (frequency shift keying), PSK (phase shift keying), and QAM (qua ­ternary amplitude modulation), where keying or modulation is used to indicate that a carrier signal is modified in some manner. The carrier is a sinusoidal signal that is initially devoid of any information. The purpose of the carrier is to translate essentially a baseband information signal to a frequency and wavelength that can be sent with a guided or propagating electro ­magnetic (EM) wave. Bandpass ASK is similar to baseband pulse amplitude modulation (PAM) in Chapter 2, Baseband Modulation and Demodulation, but FSK, PSK, and DM are new non-linear modulation techniques. ASK, FSK, and PSK can be readily extended to multiple level (M-ary) signaling and demodulated coherently or non-coherently. The optimum receiver for bandpass symmetrical or asymmetrical sig ­nals is the correlation receiver, which is developed for baseband signals in Chapter 2. Coherent demodulation uses a reference signal with the same frequency and phase as the received signal. No coherent demodulation of bandpass signaling may use differential encoding of the information to derive the reference signal in the correlation receiver. The observed bit error rate (BER) for a single, in a MATLAB simulation for several bandpass digital communication systems with coherent and non coherent correlation receivers is compared to the theoretical probability of bit error (Pb). Digital communication systems are subject to performance degrada ­tions with additive white Gaussian noise (AWGN). MATLAB simulations of bandpass communication systems are used to investigate the effect upon BER of the performance of the correlation receiver, the reduction in BER with Gray-coding of M-ary data, and binary and quaternary differential signaling. MATLAB simulations of such bandpass digital communication systems and investigations of their characteristics and performance are provided here. These simulations confirm the theoretical expectation for Pb and are the starting point for the what-ifs of bandpass digital communication system design. Finally, the constellation plot depicts the demodulated in-phase and quadra ­ture signals of complex modulation schemes in the presence of AWGN. The opti ­mum decision regions are shown, and the observed BER performance of the bandpass digital communication system can be qualitatively assessed. Delta Modulation: Delta modulation is also abbreviated as DM or Ά-modulation. It is a technique of conversion from an analog-to-digital and digital-to-analog signal. If we want to transmit the voice we use this technique. In this technique we do not give that much of importance to the quality of the voice. DM is nothing but the simplest form of differential pulse-code modulation (DPCM). But there is some difference between these two techniques. In DPCM technique the successive samples are encoded into streams of n-bit data. But in delta modulation, the transmitted data is reduced to a 1-bit data stream. Main features: * The analog signal is similar as a series of segments. * To find the increase or decrease in relative amplitude, we should compare each and every segment of the approximated signal with the original analog wave. * By this comparison of original and approximated analog waves we can determine the successive bits for establishing. * only the change of information is sent, that is, only an increase or decrease of the signal amplitude from the previous sample is sent whereas a no-change condition causes the modulated signal to remain at the same 0 or 1 state of the previous sample. By using oversampling techniques in delta modulation we can get large high signal-to-noise ratio. That means the analog signal is sampled at multiple higher than the Nyquist rate. Principle In delta modulation, it quantizes the difference between the current and the previous step rather than the absolute value quantization of the input analog waveform, which is shown in fig 1. Fig. 1 Block diagram of a Ά-modulator/demodulator The quantizer of the delta modulator converts the difference between the input signal and the average of the previous steps. The quantizer is measured by a comparator with reference to 0 (in 2- level quantizer), and its output is either 1 or 0. 1 means input signal is positive and 0 means negative. It is also called as a bit-quantizer because it quantizes only one bit at a time. The output of the demodulator rises or falls because it is nothing but an Integrator circuit. If 1 received means the output raises and if 0 received means output falls. The integrator internally has a low-pass filter it self. Transfer Characteristics A signum function is followed by the delta modulator for the transfer characteristics. It quantizes only levels of two number and also for at a time only one-bit. Output signal power In delta modulation amplitude it is does not matter that there is no objection on the amplitude of the signal waveform, due to there is any fixed number of levels. In addition to, there is no limitation on the slope of the signal waveform in delta modulation. We can observe whether a slope is overload if so it can be avoided. However, in transmitted signal there is no limit to change. The signal waveform changes gradually. Bit-rate The interference is due to possibility of in either DM or PCM is due to limited bandwidth in communication channel. Because of the above reason DM and PCM operates at same bit-rate. Noise in Communication Systems Noise is probably the only topic in electronics and telecommunications with which every-one must be familiar, no matter what his or her specialization. Electrical disturbances interfere with signals, producing noise. It is ever present and limits the performance of most systems. Measuring it is very contentious almost everybody has a different method of quantifying noise and its effects. Noise may be defined, in electrical terms, as any unwanted introduction of energy tending to interfere with the proper reception and reproduction of transmitted signals. Many disturbances of an electrical nature produce noise in receivers, modifying the signal in an unwanted manner. In radio receivers, noise may produce hiss in the loudspeaker output. In television receivers snow, or confetti (colored snow) becomes superimposed on the picture. In pulse communications systems, noise may produce unwanted pulses or perhaps cancel out the wanted ones. It may cause serious mathematical errors. Noise can l imit the range of systems, for a given transmitted power. It affects the sensitivity of receivers, by placing a limit on the weakest signals that can be amplified. It may sometimes even force a reduction in the bandwidth of a system. Noise is unwanted electrical or electromagnetic energy that degrades the quality of signals and data. Noise occurs in digital and analog systems, and can affect files and communications of all types, including text, programs, images, audio, and telemetry. In a hard-wired circuit such as a telephone-line-based Internet hookup, external noise is picked up from appliances in the vicinity, from electrical transformers, from the atmosphere, and even from outer space. Normally this noise is of little or no consequence. However, during severe thunderstorms, or in locations were many electrical appliances are in use, external noise can affect communications. In an Internet hookup it slows down the data transfer rate, because the system must adjust its speed to match conditions on the line. In a voice telephone conversation, noise rarely sounds like anything other than a faint hissing or rushing. Noise is a more significant problem in wireless systems than in hard-wired systems. In general, noise originating from outside the system is inversely proportional to the frequency, and directly proportional to the wavelength. At a low frequency such as 300 kHz, atmospheric and electrical noise are much more severe than at a high frequency like 300 MHz. Noise generated inside wireless receivers, known as internal noise, is less dependent on frequency. Engineers are more concerned about internal noise at high frequencies than at low frequencies, because the less external noise there is, the more significant the internal noise becomes. Communications engineers are constantly striving to develop better ways to deal with noise. The traditional method has been to minimize the signal bandwidth to the greatest possible extent. The less spectrum space a signal occupies, the less noise is passed through the receiving circuitry. However, reducing the bandwidth limits the maximum speed of the data that can be delivered. Another, more recently developed scheme for minimizing the effects of noise is called digital signal processing (DSP). Using fiber optics, a technology far less susceptible to noise, is another approach. Sources of Noise As with all geophysical methods, a variety of noises can contaminate our seismic observations. Because we control the source of the seismic energy, we can control some types of noise. For example, if the noise is random in occurrence, such as some of the types of noise described below, we may be able to minimize its affect on our seismic observations by recording repeated sources all at the same location and averaging the result. Weve already seen the power of averaging in reducing noise in the other geophysical techniques we have looked at. Beware, however, that averaging only works if the noise is random. If it is systematic in some fashion, no amount of averaging will remove it. The noises that plague seismic observations can be lumped into three categories depending on their source.  · Uncontrolled Ground Motion This is the most obvious type of noise. Anything that causes the ground to move, other than your source, will generate noise. As you would expect, there could be a wid e variety of sources for this type of noise. These would include traffic traveling down a road, running engines and equipment, and people walking. Other sources that you might not consider include wind, aircraft, and thunder. Wind produces noise in a couple of ways but of concern here is its affect on vegetation. If you are surveying near trees, wind causes the branches of the trees to move, and this movement is transmitted through the trees and into the ground via the trees roots. Aircraft and thunder produce noise by the coupling of ground motion to the sound that we hear produced by each. Adaptive Delta Modulation (ADM) Another type of DM is Adaptive Delta Modulation (ADM). In which the step-size isnt fixed. The step-size becomes progressively larger when slope overload occurs. When quantization error is increasing with expensive the slope error is also reduced by ADM. By using a low pass filter this should be reduced. The basic delta modulator was studied in the experiment entitled Delta modulation. It is implemented by the arrangement shown in block diagram form in Figure Figure: Basic Delta Modulation A large step size was required when sampling those parts of the input waveform of steep slope. But a large step size worsened the granularity of the sampled signal when the waveform being sampled was changing slowly. A small step size is preferred in regions where the message has a small slope. This suggests the need for a controllable step size the control being sensitive to the slope of the sampled signal. This can be implemented by an arrangement such as is illustrated in Figure Fig: An Adaptive Delta Modulator The gain of the amplifier is adjusted in response to a control voltage from the SAMPLER, which signals the onset of slope overload. The step size is proportional to the amplifier gain. This was observed in an earlier experiment. Slope overload is indicated by a succession of output pulses of the same sign. The TIMS SAMPLER monitors the delta modulated signal, and signals when there is no change of polarity over 3 or more successive samples. The actual ADAPTIVE CONTROL signal is +2 volt under normal conditions, and rises to +4 volt when slope overload is detected. The gain of the amplifier, and hence the step size, is made proportional to this Control voltage. Provided the slope overload was only moderate the approximation will catch up with the wave being sampled. The gain will then return to normal until the sampler again falls behind. Comparison of PCM and DM When coming to comparison of Signal-to-noise ratio DM has larger value than signal-to-noise ratio of PCM. Also for an ADM signal-to-noise ratio when compared to Signal-to-noise ratio of companded PCM. Complex coders and decoders are required for powerful PCM. If to increase the resolution we require a large number of bits per sample. There are no memories in Standard PCM systems each sample value is separately encoded into a series of binary digits. An alternative, which overcomes some limitations of PCM, is to use past information in the encoding process. Delta modulation is the one way of doing to perform source coding. The signal is first quantized into discrete levels. For quantization process the step size between adjacent samples should be kept constant. From one level to an adjacent one the signal makes a transition of transmission. After the quantization operation is done, sending a zero for a negative transition and a one for a positive transition the signal transmission is achieved. We can observe from this point that the quantized signal must change at each sampling point. The transmitted bit train would be 111100010111110 for the above case. The demodulator for a delta-modulated signal is nothing but a staircase generator. To increments the staircase in positively a one should be received. For negative increments a zero should be receive. This is done by a low pass filter in general. The main thing for the delta modulation is to make the right choice of step size and sampling period. A term overloading is occurred when a signal changes randomly fast for the steps to follow. The step size and the sampling period are the important parameters. In modern consumer electronics short-range digital voice transmission is used. There are many products which uses digital techniques. Such as cordless telephones, wireless headsets (for mobile and landline telephones), baby monitors are few of the items. This digital techniques used Wirelessly communicate voice information. Due to inherent noise in wireless environments the Voice coding scheme chosen. For such an application the presence of robust bit errors must be. In the presence of bit errors Pulse Coded Modulation (PCM) and its derivatives are commonly used in wireless consumer products. This is due to their compromise between voice quality and implementation cost, but these are not robust schemes. Another important voice coding scheme is Adaptive Delta Modulation (ADM). It is a mature technique for consideration for these types of applications due to its robustness in bit error and its low implementation cost. To quantize the difference between the current sample and the predicted value of the next Sample ADM is used. It uses a variable called step height which is used to adjustment of the prediction value of the next sample. For the reproduction of both slowly and rapidly changing input signals faithfully. In ADM, the representation of each sample is one bit (i.e. 1 or 0). It does not require any data framing for one-bit-per-sample stream to minimizing the workload on the host microcontroller. In any digital wireless application there should be Bit errors. In ideal environment most of the voice coding techniques are provided which are good in quality of audio signals. The main thing is to provide good audio signals in everyday environment, there may be a presence of bit errors. For different voice coding methods and input signals the traditional performance metrics (e.g. SNR) does not measure accurately in audio quality. . Mean Opinion Score (MOS) testing is the main important parameter which overcomes the limitations of other metrics by successfully in audio quality. For audio quality the MOS testing is used. It is a scale of 1 to 5 which tells the audio quality status. In there 1 represents very less (bad) speech quality and 5 represents excellent speech quality. A toll quality speech has a MOS score of 4 or higher than it. The audio quality of a traditional telephone call has same MOS value as above. The below graphs shows the relationship between MOS scores and bit errors for three of the most common voice coding schemes. Those are CVSD, ÃŽÂ ¼-law PCM, and ADPCM. A continuously Variable Slope Delta (CVSD) coding is a member of the ADM family in voice coding schemes. The below graph shows the resulted audio quality (i.e. MOS score). All three schemes explain the number of bit errors. As the no of bit errors increases the graph indicates that ADM (CVSD) sounds better than the other schemes which are also increase. In an ADM design error detection and correction typically are not used because ADM provides poor performance in the presence of bit errors. This leads to reduction in host processor workload (allowing a low-cost processor to be used). The superior noise immunity significantly reduced for wireless applications in voice coding method. The ADM is supported strongly by workload for the host processor. The following example shows the benefits of ADM for wireless applications and is demonstrated. For a complete wireless voice product this low-power design is used which includes all of the building blocks, small form-factor, including the necessary items. ADM voice codec Microcontroller RF transceiver Power supply including rechargeable battery Microphone, speaker, amplifiers, etc. Schematics, board layout files, and microcontroller code written in C. Delta modulation (DM) may be viewed as a simplified form of DPCM in which a two level (1-bit) quantizer is used in conjunction with a fixed first-order predictor. The block diagram of a DM encoder-decoder is shown below.   The dm_demo shows the use of Delta Modulation to approximate input sine wave signal and a speech signal that were sampled at 2 KHz and 44 KHz, respectively. The source code file of the MATLAB code and the out put can be viewed using MATLAB. Notice that the approximated value follows the input value much closer when the sampling rate is higher. You may test this by changing sampling frequency, fs, value for sine wave in dm_demo file. Since DM (Delta Modulator) approximate a waveform Sa(t) by a linear staircase function, the waveform Sa(t) must change slowly relative to the sampling rate. This requirement implies that waveform Sa(t) must be oversampled, i.e., at least five times the Nyquist rate. Oversampling means that the signal is sampled faster than is necessary. In the case of Delta Modulation this means that the sampling rate will be much higher than the minimum rate of twice the bandwidth. Delta Modulation requires oversampling in order to obtain an accurate prediction of the next input. Since each encoded sample contains a relatively small amount of information Delta Modulation systems require higher sampling rates than PCM systems. At any given sampling rate, two types of distortion, as shown below limit the performance of the DM encoder.   Slope overload distortion: This type of distortion is due to the use of a step size delta that is too small to follow portions of the waveform that have a steep slope. It can be reduced by increasing the step size. Granular noise: This results from using a step size that is too large too large in parts of the waveform having a small slope. Granular noise can be reduced by decreasing the step size. Even for an optimized step size, the performance of the DM encoder may still be less satisfactory. An alternative solution is to employ a variable step size that adapts itself to the short-term characteristics of the source signal. That is the step size is increased when the waveform has a step slope and decreased when the waveform has a relatively small slope. This strategy is called adaptive DM (ADM). Block Diagram Adaptive Delta Modulation for Audio Signals: While transmitting speech for e.g. telephony the transfer rate should be kept as small as possible to save bandwidth because of economic reason. For this purpose Delta Modulation, adaptive Delta modulation, Differential Pulse-Code modulation is used to compress the data. In this different kind of Delta modulations and Differential Pulse Code modulations (DPCM) were realized to compress audio data. At first the principal of compressing audio data are explained, which the modulations based on. Mathematical equations (e.g. Auto Correlation) and algorithm (LD recursion) are used to develop solutions. Based on the mathematics and principals Simulink models were implemented for the Delta modulation, Adaptive Delta modulation as well as for the adaptive Differential Pulse Code modulation. The theories were verified by applying measured signals on these models. Signal-to-noise ratio Signal-to-noise ratio (often abbreviated SNR or S/N) is an electrical engineering measurement, also used in other fields (such as scientific measurement or biological cell signaling), defined as the ratio of a signal power to the noise power corrupting the signal. A ratio higher than 1:1 indicates more signal than noise. In less technical terms, signal-to-noise ratio compares the level of a desired signal (such as music) to the level of background noise. The higher the ratio, the less obtrusive the background noise is. In engineering, signal-to-noise ratio is a term for the power ratio between a signal (meaningful information) and the background noise: where P is average power. Both signal and noise power must be measured at the same and equivalent points in a system, and within the same system bandwidth. If the signal and the noise are measured across the same impedance, then the SNR can be obtained by calculating the square of the amplitude ratio: where A is root mean square (RMS) amplitude (for example, typically, RMS voltage). Because many signals have a very wide dynamic range, SNRs are usually expressed in terms of the logarithmic decibel scale. In decibels, the SNR is, by definition, 10 times the logarithm of the power ratio: Cutoff rate For any given system of coding and decoding, there exists what is known as a cutoff rate R0, typically corresponding to an Eb/N0 about 2 dB above the Shannon capacity limit. The cutoff rate used to be thought of as the limit on practical error correction codes without an unbounded increase in processing complexity, but has been rendered largely obsolete by the more recent discovery of turbo codes. Bit error rate In digital transmission, the bit error rate or bit error ratio (BER) is the number of received binary bits that have been altered due to noise and interference, divided by the total number of transferred bits during a studied time interval. BER is a unit less performance measure, often expressed as a percentage number. As an example, assume this transmitted bit sequence: 0 1 1 0 0 0 1 0 1 1, And the following received bit sequence: 0 0 1 0 1 0 1 0 0 1, The BER is in these case 3 incorrect bits (underlined) divided by 10 transferred bits, resulting in a BER of 0.3 or 30%. The bit error probability pe is the expectation value of the BER. The BER can be considered as an approximate estimate of the bit error probability. The approximation is accurate for a long studied time interval and a high number of bit errors. Factors affecting the BER In a communication system, the receiver side BER may be affected by transmission channel noise, interference, distortion, bit synchronization problems, attenuation, wireless multipath fading, etc. The BER may be improved by choosing a strong signal strength (unless this causes cross-talk and more bit errors), by choosing a slow and robust modulation scheme or line coding scheme, and by applying channel coding schemes such as redundant forward error correction codes. The transmission BER is the number of detected bits that are incorrect before error correction, divided by the total number of transferred bits (including redundant error codes). The information BER, approximately equal to the decoding error probability, is the number of decoded bits that remain incorrect after the error correction, divided by the total number of decoded bits (the useful information). Normally the transmission BER is larger than the information BER. The information BER is affected by the strength of the forward error correction code. CHAPTER II Pulse-code modulation: Pulse-code modulation (PCM) is a method used to digitally represent sampled analog signals, which was invented by Alec Reeves in 1937. It is the standard form for digital audio in computers and various Compact Disc and DVD formats, as well as other uses such as digital telephone systems. A PCM stream is a digital representation of an analog signal, in which the magnitude of the analogue signal is sampled regularly at uniform intervals, with each sample being quantized to the nearest value within a range of digital steps. PCM streams have two basic properties that determine their fidelity to the original analog signal: the sampling rate, which is the number of times per second that samples are taken; and the bit-depth, which determines the number of possible digital values that each sample can take. Digitization as part of the PCM process In conventional PCM, the analog signal may be processed (e.g. by amplitude compression) before being digitized. Once the signal is digitized, the PCM signal is usually subjected to further processing (e.g. digital data compression). PCM with linear quantization is known as Linear PCM (LPCM). Some forms of PCM combine signal processing with coding. Older versions of these systems applied the processing in the analog domain as part of the A/D process; newer implementations do so in the digital domain. These simple techniques have been largely rendered obsolete by modern transform-based audio compression techniques. * DPCM encodes the PCM values as differences between the current and the predicted value. An algorithm predicts the next sample based on the previous samples, and the encoder stores only the difference between this prediction and the actual value. If the prediction is reasonable, fewer bits can be used to represent the same information. For audio, this type of encoding reduces the number of bits required per sample by about 25% compared to PCM. * Adaptive DPCM (ADPCM) is a variant of DPCM that varies the size of the quantization step, to allow further reduction of the required bandwidth for a given signal-to-noise ratio. * Delta modulation is a form of DPCM which uses one bit per sample. In telephony, a standard audio signal for a single phone call is encoded as 8000 analog samples per second, of 8 bits each, giving a 64 kbit/s digital signal known as DS0. The default signal compression encoding on a DS0 is either ÃŽÂ ¼-law (mu-law) PCM (North America and Japan) or A-law PCM (Europe and most of the rest of the world). These are logarithmic compression systems where a 12 or 13-bit linear PCM sample number is mapped into an 8-bit value. This system is described by international standard G.711. An alternative proposal for a floating point representation, with 5-bit mantissa and 3-bit radix, was abandoned. Where circuit costs are high and loss of voice quality is acceptable, it sometimes makes sense to compress the voice signal even further. An ADPCM algorithm is used to map a series of 8-bit  µ-law or A-law PCM samples into a series of 4-bit ADPCM samples. In this way, the capacity of the line is doubled. The technique is detailed in the G.726 standard. Later it was found that even further compression was possible and additional standards were published. Pulse code modulation (PCM) data are transmitted as a serial bit stream of binary-coded time-division multiplexed words. When PCM is transmitted, pre modulation filtering shall be used to confine the radiated RF spectrum. These standards define pulse train structure and system design characteristics for the implementation of PCM telemetry formats. Class Distinctions and Bit-Oriented Characteristics The PCM formats are divided into two classes for reference. Serial bit stream characteristics are described below prior to frame and word orient

The History of Welfare in America Essay -- Origins of Public Welfare P

Welfare has been a safety net for many Americans, when the alternative for them is going without food and shelter. Over the years, the government has provided income for the unemployed, food assistance for the hungry, and health care for the poor. The federal government in the nineteenth century started to provide minimal benefits for the poor. During the twentieth century the United States federal government established a more substantial welfare system to help Americans when they most needed it. In 1996, welfare reform occurred under President Bill Clinton and it significantly changed the structure of welfare. Social Security has gone through significant change from FDR’s signing of the program into law to President George W. Bush’s proposal of privatized accounts. The increase in industrialization in the U.S. during the 1820’s caused a rise in homelessness. Women made up the majority of the homeless population. During the beginning of the nineteenth century, private charities helped provide food and shelter for the homeless. Towards the end of the nineteenth century men became the majority of the homeless population. The federal government created â€Å"mother’s pension laws† which were protective labor laws that assisted poor women and children. Shelters required a work test for men to enter and only allowed them to stay for a limited amount of time. Charities did not help men in the nineteenth century (Homelessness in the United States). On October 29, 1929, the roaring twenties ended. The U.S. stock market crashed and the Great Depression began. Those who had invested in the stock market for retirement saw their investments disappear. President Franklin Roosevelt’s â€Å"New Deal† focused first on providing employment for the... ...for Children and Families. 6 Mar 2009. . â€Å"Medicaid Home Page.† 16 Sept 2004. Centers for Medicare & Medicaid Services. 6 Mar 2009. . Shields, Mark. â€Å"Messing with Social Security.† Cnn.com. 7 Mar 2009. . â€Å"Bill of Rights in Action.† June 1998. Constitutional Rights Foundation. 6 Mar 2009. . â€Å"Food Stamp Program.† 4 Feb 2005. Food and Nutrition Service. 6 Mar 2009. . â€Å"Women, Infants, and Children.† 1 Jan 2004. Food and Nutrition Service. 6 Mar 2009. . â€Å"The Future of Social Security.† Mar 2005. Social Security Administration. 6 Mar 2009. .

Essay example --

The Scarlet Letter starts off by throwing Hester Prynne into drama after being convicted for adultery in a Puritan area. Traveling from Europe to America causes complications in her travel which also then separates her from her husband, Roger Chillingworth for about three years. Due to the separation, Hester has an affair with an unknown lover resulting in having a child. Ironically, her lover, Arthur Dimmesdale, is a Reverend belonging to their church who also is part of the superiors punishing the adulterer. No matter how many punishments are administered to Hester, her reactions are not changed. Through various punishments, Hester Prynne embraces her sin by embroidering a scarlet letter â€Å"A† onto her breast. However, she is also traumatized deep within from everything she’s been through. Nathaniel Hawthorne depicts this story of sin by using rhetorical devices such as allusion, alliteration and symbolism. The first rhetorical device used is allusion. An allusion is used to make a reference to a person, place, or thing that has happened. â€Å"they marked out the first burial-ground, on Isaac Johnson's lot, and round about his grave.† After finding a new colony, they allot a portion of soil to a cemetery in King’s Chapel and another portion of land to a prison. Hawthorne uses this to hint something is going to happen later in the story and by saying the Puritans first built a prison and a cemetery before anything else basically leads the whole story to what we know. As we find out at the end, Reverend Arthur Dimmesdale develops a heart disease from stress of the sin he has committed and eventually dies confessing his love for Hester Prynne. In this allusion, a prison, one of the first marks in the town, is built. We le... ...ven symbolize the lesson taught in The Scarlet Letter is beautiful, despite its tragic ending. Nathaniel Hawthorne uses allusion, alliteration and symbolism to tell the perfect story. Anyone can infer from this novel that adultery is obviously wrong. Adultery doesn’t only affect the two people who have committed it, but also affects the townspeople. Keeping quiet causes extreme pain and suffering. The townspeople are always suspicious of each other and no one can trust anyone. Because Reverend Arthur Dimmesdale kept his secret bottled up and Hester admitted to the whole thing, he was left to suffer from guilt. If Dimmesdale came out and told the truth, maybe he would have been spared, lived a free life and survived long enough to spend time with the one he truly loved, Hester Prynne. That means the prison and cemetery wouldn’t mean anything in the future.

Global Financial Institutions Essay

This paper briefly presents the role of global financial institutions, such as the International Monetary Fund, the World Bank, and Asian Development Bank in the global financing; and examines briefly their influence on exchange rate. International Monetary Fund (IMF) Established in 1944, the IMF has a headquarters in Washington DC. , employs 2,596 staff from 146 countries, and is owned and financed by 185 member countries (IMF, 2008). Its main task is to ensure the stability of the international monetary system—â€Å"the system of exchange rates and international payments that enables countries to buy goods and services from each other† (IMF, 2008). To maintain stability in the international monetary system, it provides (1) advice on appropriate social and economic policies, (2) financing to help member countries cope with balance of payments problems when foreign exchange payments exceed foreign exchange earnings, and (3) technical assistance and training to build needed expertise and institutions to attain economic growth (IMF, 2006). To maintain exchange rate stability, member countries prior to 1971 pegged their exchange rates that could only be adjusted with the IMF’s agreement. Since 1971, member countries can freely select any type of exchange rate arrangement: â€Å"allowing the currency to float freely; pegging it to another currency or a basket of currencies; adopting the currency of another country; or participating in a currency bloc† (IMF, 2006). The World Bank (the Bank) The Bank, established in 1944, has a headquarters in Washington DC with more than 100 country offices, and employs about 10,000 staff. It is owned and financed by 187 member countries (World Bank, 2008). The Bank is made up of two development institutions: the International Bank for Reconstruction and Development (IBRD), and (2) the International Development Association (IDA). Each institution has a role in achieving the Bank’s mission of reducing global poverty and improving living standards. The IBRD is responsible for middle income poor countries, while IDA caters to the needs of the poorest countries in the world. Both provide interest-free credit and grants, and low-interest loans to developing countries for infrastructure, health, education, communications, and other purposes (World Bank, 2008). The Bank provides â€Å"local cost financing for projects in non-CFP borrowing countries† with clear indirect foreign costs and â€Å"if a specific project has too little foreign exchange cost to permit the Bank to achieve its project objectives by foreign exchange financing alone† (World Bank, 2007). It also has a project preparation facility that finances foreign exchange costs (World Bank, 2007). Asian Development Bank (ADB) Established in 1966, ADB has a headquarters in Manila with 26 country offices, and employs more than 2,400 staff. It is owned and financed by 67 members with 48 members from the region and other members from other parts of the world (ADB, 2008). As an international development finance institution, it helps its developing member countries reduce poverty and enhance people’s quality of life. It provides assistance to the public sector through grants, low-interest loans, advice, and knowledge as well as to private enterprises through loans, guarantees, and equity investments (ADB, 2008). In making direct loans, ADB assumes the foreign exchange risks involved in private sector operations, but not in public sector lending. To address the foreign exchange risks (e. g. , foreign exchange fluctuations between loan approved amount and disbursement), ADB introduced the LIBOR-based loan, which allows borrowing countries to match the procurement currencies with loan denomination currencies, or convert the loan denomination currencies at any time to match the revenue denomination currencies (ADB, 2004). ADB may also provide financing to meet the â€Å"indirect foreign exchange cost of items procured in local currency for ADB-financed projects with foreign exchange costs† (ADB, 2003). References Asian Development Bank (2008). About ADB. Retrieved June 16, 2008, from http://www. adb. org/About/default. asp. Asian Development Bank (2004, July 1). Foreign exchange risk. Retrieved June 16, 2008, from http://www. adb. org/Documents/Manuals/Operations/OMH07_1apr04. pdf. Asian Development Bank (2003, October 29). Financing indirect foreign exchange cost of projects. Retrieved June 16, 2008, from http://www. adb. org/Documents/Manuals/Operations/OMH07_1apr04. pdf. International Monetary Fund (2008, May). IMF at a glance. Retrieved June 12, 2008, from http://www. imf. org/external/np/exr/facts/glance. htm. International Monetary Fund (2006, September 30). What is IMF? Retrieved June 12, 2008, from http://www. imf. org/external/pubs/ft/exrp/what. htm/. The World Bank (2008). About us. Retrieved June 16, 2008, from http://web. worldbank. org/WBSITE/EXTERNAL/EXTABOUTUS/0,,pagePK:50004410~piPK:36602~theSitePK:29708,00. html The World Bank (2007, March 23). Specific expenditure eligibility and cost sharing requirements for investment projects in countries without approved country financing parameters. Retrieved June 16, 2008, from http://wbln0018. worldbank. org/Institutional/Manuals/OpManual. nsf/22b87a45c65c

Demand Curve and Supply Curve Essay

Demand and supply have been generalized to explain macroeconomic variables in a market economy. The Aggregate Demand-Aggregate Supply model is the most direct application of supply and demand to macroeconomics. Compared to microeconomic uses of demand and supply, different theoretical considerations apply to such macroeconomic counterparts as aggregate demand and aggregate supply. The AD-AS or Aggregate Demand-Aggregate Supply model is a macroeconomic model that explains price level and output through the relationship of aggregate demand and aggregate supply. It is based on the theory of John Maynard Keynes presented in his work â€Å"The General Theory of Employment, Interest, and Money†. It is one of the primary simplified representations in the modern field of macroeconomics and is used by a broad array of economists, from libertarian, monetarist supporters of laissez-faire, such as Milton Friedman to Post-Keynesian supporters of economic interventionism, such as Joan Robinson. Brief history of demand curve and supply curve According to Hamid S.  Hosseini, the power of supply and demand was understood to some extent by several early Muslim economists, such as Ibn Taymiyyah who illustrates- â€Å"If desire for goods increases while its availability decreases, its price rises. On the other hand, if availability of the good increases and the desire for it decreases, the price comes down†. In 1691, John Locke worked on some considerations of the consequences of the lowering of interest and the raising of the value of money. It includes an early and clear description of supply and demand and their relationship. In this description demand is rent: â€Å"The price of any commodity rises or falls by the proportion of the number of buyer and sellers† and â€Å"that which regulates the price of goods is nothing else but their quantity in proportion to their rent. † The phrase â€Å"supply and demand† was first used by James Denham-Steuart in his Inquiry into the â€Å"Principles of Political Oeconomy† which was published in 1767. Adam Smith used the phrase in his book â€Å"The Wealth of Nations† (1776) and David Ricardo titled one chapter of his work â€Å"Principles of Political Economy and Taxation† (1817) On the Influence of Demand and Supply on Price. In The Wealth of Nations, Smith generally assumed that the supply price was fixed but that its value would decrease as its â€Å"scarcity† increased, in effect what was later called the law of demand also. Ricardo, in Principles of Political Economy and Taxation, more rigorously laid down the idea of the assumptions that were used to build his ideas of supply and demand. Antoine Augustin Cournot first developed a mathematical model of supply and demand in his 1838 Researches into the Mathematical Principles of Wealth including diagrams. In1870, Fleeming Jenkin in the course of â€Å"Introducing the diagrammatic method into the English economic literature† published the first drawing of supply and demand curves including comparative statics from a shift of supply or demand and application to the labor market. The model was further developed and popularized by Alfred Marshall in the textbook â€Å"Principles of Economics† (1890). The Standard demand curve and the aggregate demand curve The standard demand curve represents the quantity of a good that a consumer will buy at a given price, holding all else constant. For example, consumer A might buy zero oranges at $1 each, one orange at 75 cents each, and two at 50 cents each, while consumer B might buy one at $1, two at 75 cents, and three at 50 cents. When charted on a grid with price on the vertical axis and quantity purchased on the horizontal axis, these points form the individual demand curves for consumers A and B. The aggregate demand curve represents the total quantity of all goods (and services) demanded by the economy at different price levels. An example of an aggregate demand curve is given in Figure 1. The vertical axis represents the price level of all final goods and services. The aggregate price level is measured by either the GDP deflator or the CPI. The horizontal axis represents the real quantity of all goods and services purchased as measured by the level of real GDP. Notice that the aggregate demand curve, AD, like the demand curves for individual goods, is downward sloping, implying that there is an inverse relationship between the price level and the quantity demanded of real GDP. The standard supply curve and the aggregate supply curve The standard supply curve is a graph showing the relationships between the price of a good and the quantity supplied. The supply curve slopes upward because other things equal, a higher price means a greater quantity supplied. The aggregate supply curve shows the relationship between the price level and the quantity of goods and services supplied in an economy. The equation for the upward sloping aggregate supply curve, in the short run, is Y = Ynatural + a (P – Pexpected). In this equation, Y is output, Ynatural is the natural rate of output that exists when all productive factors are used at their normal rates, â€Å"a† is a constant greater than zero, P is the price level, and Pexpected is the expected price level. This equation holds only in the short run because in the long run the aggregate supply curve is a vertical line, as output is dictated by the factors of production alone. An aggregate supply curve is shown in Figure 2. The aggregate supply curve equation means that output deviates from the natural rate of output when the price level deviates from the expected price level. The constant, a, shows how much output changes due to unexpected deviation in the price level. The slope of the aggregate supply curve is (1/a) which depicts the short-run aggregate supply curve and the long- run aggregate supply curve. The vertical axis is the price level. The horizontal axis is output or income. The short-run aggregate supply curve is downward sloping with slope equal to (1/a) while the long-run aggregate supply curve is vertical with no slope. The reason that the short-term aggregate supply curve is upward sloping is a bit more complex. Factors that determine the slope of AD-AS curve model The slope of AD curve reflects the extent to which the real balances change the equilibrium level of spending, taking both assets and goods markets into consideration. An increase in real balances will lead to a larger increase in equilibrium income and spending, the smaller the interest responsiveness of money demand and the higher the interest responsiveness of investment demand. An increase in real balances leads to a larger level of income and spending, the larger the value of multiplier and the smaller the income response of money demand. This implies that the AD curve is flatter, smaller is the interest responsiveness of the demand for money and larger is the interest responsiveness of investment demand. Also, the AD curve is flatter; the larger is the multiplier and the smaller the income responsiveness of the demand for money. We know that aggregate demand is comprised of C(Y – T) + I(r) + G + NX(e) = Y. Thus, a decrease in any one of these terms will lead to a shift in the aggregate demand curve to the left. The first term that will lead to a shift in the aggregate demand curve is C(Y – T). This term states that consumption is a function of disposable income. If disposable income decreases, consumption will also decrease. There are many ways that consumption can decrease. An increase in taxes would have this effect. Similarly, a decrease in income–holding taxes stable–would also have this effect. Finally, a decrease in the marginal propensity to consume or an increase in the savings rate would also decrease consumption. The second term that will lead to a shift in the aggregate demand curve is I(r). This term states that investment is a function of the interest rate. If the interest rate increases, investment falls as the cost of investment rises. There are a number of ways that investment can fall. If the interest rate rises, say due to contractionary monetary or fiscal policy, investment will fall. Similarly, in the short run, expansionary fiscal policy will also cause investment to fall as crowding out occurs. Another interesting cause of a fall in investment is an exogenous decrease in investment spending. This occurs when firms simply decide to invest less without regard for the interest rate. The term variable that will lead to a shift in the aggregate demand curve is G. This term captures the whole of government spending. The only way that government spending is changed is through fiscal policy. Recall that the budgetary debate is an ongoing political battlefield. Thus, government spending tends to change regularly. When government spending decreases, regardless of tax policy, aggregate demand decrease, thus shifting to the left. The fourth term that will lead to a shift in the aggregate demand curve is NX(e). This term means that net exports, defined as exports less imports, is a function of the real exchange rate. As the real exchange rate rises, the dollar becomes stronger, causing imports to rise and exports to fall. Thus, policies that raise the real exchange rate though the interest rate will cause net exports to fall and the aggregate demand curve to shift left. Again, an exogenous decrease in the demand for exported goods or an exogenous increase in the demand for imported goods will also cause the aggregate demand curve to shift left as net exports fall. An example of this type of exogenous shift would be a change in tastes or preferences. The aggregate demand curve also can shift right as the economy expands. When the aggregate demand curve shifts right, the quantity of output demanded for a given price level rises. Therefore, a shift of the aggregate demand curve to the right represents an economic expansion. A shift of the aggregate demand curve to the right is simply affected by the opposite conditions that cause it to shift to the left. A change in one or more of the following determinants of aggregate supply will shift the aggregate supply curve in the short run. – Change in the input prices (domestic or imported resources price), change in productivity, change in legal institutional environment (business taxes and government regulation). An increase in short-run aggregate supply will shift the curve rightward; a decrease will shift the curve leftward. The long run aggregate supply curve is vertical. Similarities between the Ad-AS curve model and the standard demand-supply curve model The conventional â€Å"aggregate supply and demand† model is actually a Keynesian visualization that has come to be a widely accepted image of the theory. The Classical supply and demand model, which is largely based on Say’s Law, or that supply creates its own demand depicts the aggregate supply curve as being vertical at all times. The both demand curve and the aggregate demand curve is negatively sloped from left to right and both curves represent the law of demand. The short-run aggregate supply curve or SRAS curve has similarities the standard supply curve. Both are positively sloped. Both curves relate price and quantity. Differences between the Ad-AS curve model and the standard demand-supply curve model In aggregate demand curve, there is no substitute effect because we cannot substitute all goods. But in standard demand curve it exists. The aggregate demand curve has no income effect because a lower price level actually means less nominal income for the resource suppliers’ e. g. lower wages, rents, interests, and profits. But in standard demand curve it exists. The major differences between the standard supply curve and the aggregate supply curve are as follows- for the market supply curve, the vertical axis measures supply price and the horizontal axis measures quantity supplied. For the short-run aggregate supply curve, however, the vertical axis measures the price level (GDP price deflator) and the horizontal axis measures real production (real GDP). The positive slope of the market curve reflects the law of supply and is attributable to the law of diminishing marginal returns. In contrast, the positive slope of the short-run aggregate supply curve is attributable to: (1) inflexible resource prices that often makes it easier to reduce aggregate real production and resource employment when the price level falls, (2) the pool of natural unemployment, consisting of frictional and structural unemployment, that can be used temporarily to increase aggregate real production when the price level rises and (3) imbalances in the purchasing power of resource prices that can temporarily entice resource owners to produce more or less aggregate real production than they would at full employment. Conclusion Whereas the standard supply and demand curve model discusses on individuals, the aggregate supply and demand curve model works with the whole economy. This model is built on the assumption that prices are sticky in the short run and flexible in the long run. This model also highlights the role of monetary policy. This model shows how shocks to the economy cause output to deviate temporarily from the level implied by the standard model. By this model, we can observe the economy more efficiently than before.