The Anthropocene Epoch Humanity Essay - 1384 Words

The Anthropocene Epoch Humanity is confronted by multiple environmental challenges which threaten to undermine the advances in health achieved over recent decades. The Rockefeller Foundation/Lancet Commission on Planetary Health showed how climate change, loss of biodiversity, land use change, ocean acidification and overfishing, nitrogen and phosphorus loading and environmental pollution more generally all have the potential to adversely affect health through a range of pathways1. A recent joint publication by WHO and Convention on Biological Diversity articulated the myriad connections between biodiversity and health and the threats to both posed by environmental change2. The dramatic changes in the global environment have led many scientists to conclude that we are living in a new geological epoch – the Anthropocene – in which the activities of one species – homo sapiens -have become the dominant driving force transforming the Earth’s natural systems3. These natural systems provide food, clean water and air and modulate the global temperature within limits in which humanity has been able to flourish for around 11,500 years during the preceding Holocene epoch. The scale and pace of change is dramatic; for example, the extinction of species is occurring at around 100-fold pre-human rates4. The population sizes of vertebrate species have, on average, declined by half over the last 45 years5. More than 2.3 million km2 of primary forest has been felled since 20006. AboutShow MoreRelatedThe Nature Of Sustainability : A Human Nature Hybridity Essay1820 Words   |  8 Pagesphilosophy that aims to protect and improve the health of the environment. While humans have accepted this view of environmentalism for living in the Holocene epoch, political environmentalist Paul Wapner proposes a renewed definition of environmentalism that has emerged in the Anthropocene epoch. Wapner sees the Anthropocene as an epoch of human geological influence, where humans have inflicted a signature on the earth leaving it â€Å"independent of human experience† (2). That is to say, humans haveRead MoreEnvironmentalism Is Not A New Concept Essay1809 Words   |   8 PagesIt is a social movement that aims to protect and improve the health of the environment. While humans have accepted this view of environmentalism for the Holocene epoch, political environmentalist Paul Wapner proposes a renewed definition of environmentalism that has emerged in the Anthropocene epoch. Wapner sees the Anthropocene as an epoch of human geological influence, where humans have inflicted a signature on the earth, leaving it â€Å"independent of human experience† (37). That is to say, humans haveRead MoreThe World s Terrifying Impact On Earth Justifies New Anthropocene Epoch1752 Words   |  8 Pagesâ€Å"Humanity’s terrifying impact on Earth justifies new Anthropocene epoch† is the title of an article published in the Guardian newspaper in October 2014, the purpose of this essay is to assess if this statement was and is true. The geologic timescale comprises of Eons, Eras, Periods, Epochs and Ages, all of which fit into each other with Eon being the largest. Key geological events in the life of the planet are used to mark the transition from one of these chapters to another. Fig 1 has been createdRead MoreEffects Of The Columbian Exchange1121 Words   |  5 Pageshad some environmental impacts, such as the loss of wetlands, deforestation, and both air and water pollution. Thus being the â€Å"birth of the Anthropocene.† The Anthropocene is â€Å"the idea that humanity has driven the planet into a new geological epoch has been around for a century or more. But recently, it has begun to gain momentum† (Anthropocene). The Anthropocene and the Great Acceleration tie together in some aspects, since they are both a product since the Columbian Exchange and the Industrial RevolutionRead MoreThe Capitalist Neo Liberal System Essay1839 Words   |  8 PagesThe anthropogenic circumstance of Climate Change engenders the phenomenon whereby humanity must attempt to save itself from the problems of its own doing. As global conditions destabilise, drastic international action is required to mitigate climate change (Bierman, 2014). This essay will analyse the current capitalist neo-liberal system to determine its capacity to facilitate collective international action. Such analysis will draw upon examples of the Kyoto Protocol and China’s integration intoRead MoreThe Role Of Contemporary Education On A Sustainable Global Society2006 Words   |  9 PagesIntroduction (519 words) The 21st century has marked the importance of bringing up urgent, but complex problems involving significant threats to all humanity, such as global warming, pollution, and ozone depletion. Never before had it been so critical to analyse the environmental degradation and to join all the nations’ forces in order to build a sustainable global society which is meant to be based on â€Å"respect for nature, universal human rights, economic justice, and a culture of peace† (The EarthRead MoreAnalyzing Anthropocentrism Ethic : A Case Study Of Climate Change1209 Words   |  5 Pagespollution make our mother planet- the earth changed sharply in such a short period (Markham, 2009). The philosophy of anthropocentrism guides people’s mind within a long history, especially become a consensus after industrialization period. In the anthropocene, the human beings are more likely to be treated as the subject of nature, and force nature to get the raw material for the survival and development of human society (Hamilton et al. 2015). As there is an argument, should anthropocentrism be responsibleRead MoreOur Solar System For Colonization1198 Words   |  5 PagesAs humanity continues to progress and drain the Earth’s resources, the planet has started a downfall of degradation--something that should have taken millions of years under natural conditions. Species are going extinct and the greenhouse gas levels are reaching high levels because of advanced civilization. The current sustainability projects humans possess are neither long term nor effective. As resources decrease and greenhouse gases increase, many scientists are looking for alternative placesRead MoreThe Is The Noble Pursuit Of Human Life1861 Words   |  8 Pagesposit to you that engineering is the noble pursuit to sustain human life and therefore is inherently an anthropological endeavour and humanistic effort to nurture humanity and manifest its glory. Were we to give rise to the cla ssical connotations engineering carries of cold and pure problem-solving-uninterested in issues of the humanities - indeed it would betray the magnitude of our existence as a species. It is this very facet that has brought us to the magnificence this day. Now with encroachingRead MoreThe Great White Shark, By Paul J. Crutzen And Eugene F. Stoermer2022 Words   |  9 PagesIn the early 2000s, the ‘Anthropocene’ emerged as a widespread term to represent the current era of Earth’s history. According to Paul J. Crutzen and Eugene F. Stoermer, the ‘Anthopocene’ represents a â€Å"geologic epoch† characterized by human activities that profoundly transform the environment, threaten ecosystems, and cause unparalleled disruptions on earth’s natural processes. (Ogden et al. 2013: 341) Unfortunately, humanity in the period of the ‘Anthropocene’ has contributed to a range of environmental

The End or The Journey Free Essays

The road awards my future goal would be able to modify my personality. The Journey would allow myself to understand my personality even further. Also, the passage towards my future would grant myself the privilege of discovering who I am. We will write a custom essay sample on The End or The Journey or any similar topic only for you Order Now I do not understand myself, but a part of the journey is discovering what your intentions, dreams, actions, paths are. The goal would still be at the end. However, the journey is a never-ending adventure. The initial goal would waiver with each action, decision, made. The future is full of different paths, experiencing the different paths would transform a person into a new being. A person is similar to a caterpillar, a transforming creature. The caterpillar changes from a helpless creature into a powerful butterfly and humans grow with each experience they encounter. For example, each day that goes by, science is evolving by the scientists who encounter new Ideas, experiments, and results. Each day passes with change from within. As a future is full of different paths, dreams are full of different results and mindsets. In the life Vive experienced so far, Vive been through many dreams and career paths, the journey towards my future is a never-ending experience. My first dream started as an artist during my elementary school days; that ended when I realized there were other people who were more talented in the arts. However, I continued to sketch as a hobby. My second career path was through history as an anthropologist; that career went down the drain because of money issues. My third dream was a preschool teacher. That dream began with my love for children and is still a possible career selection for my future. My fourth career choice Is a pedantically. Although the choice of continuing school for a long time will probably backfire on me, the desire to alp children has kept that dream alive. My fifth dream Is to be an accountant, my current dream. All the different dreams I’ve had over the years has set myself towards different results, but my ever-changing demeanor has confused my end result. The future Is unclear and the path Is cloudy, the end Is a mystery and the Journey Is a challenge. People will grow as they move forward. However, there Is no guarantee of growth at the end of the road. The obstacles before a challenger calls for mistakes and growth, not perfection. The end is perfection, but the trek towards he end is full of mistakes, errors, and progress. That is why I believe that the journey is greater than the goal. The End or The Journey By Cindy â€Å"The Journey is far greater than the inn. † I am a sixteen year old girl. As a child, there is a long Journey towards adulthood. There is the pleasure of the Journey taken and the Joy of the end. Some people may more impact on the person. During Journeys, there are obstacles that the Journeyer has to overcome. The road understand myself, but a part of the Journey is discovering what your intentions, dreams, actions, paths are. The goal would still be at the end. However, the Journey is new ideas, experiments, and results. Each day passes with change from within. As a selection for my future. My fourth career choice is a petrifaction. Although the help children has kept that dream alive. My fifth dream is to be an accountant, my current dream. All the different dreams Vive had over the years has set myself result. The future is unclear and the path is cloudy, the end is a mystery and the journey is a challenge. People will grow as they move forward. However, there is no the end is full of mistakes, errors, and progress. That is why I believe that the Journey How to cite The End or The Journey, Papers

Essay About The Big Bang To Today Example For Students

Essay About The Big Bang To Today It is always a mystery about how the universe began, whether if and when it will end. Astronomers construct hypotheses called cosmological models that try to find the answer. There are two types of models: Big Bang and Steady State. However, through many observational evidences, the Big Bang theory can best explain the creation of the universe. The Big Bang model postulates that about 15 to 20 billion years ago, the universe violently exploded into being, in an event called the Big Bang. Before the Big Bang, all of the matter and radiation of our present universe were packed together in the primeval fireballan extremely hot dense state from which the universe rapidly expanded.1 The Big Bang was the start of time and space. The matter and radiation of that early stage rapidly expanded and cooled. Several million years later, it condensed into galaxies. The universe has continued to expand, and the galaxies have continued moving away from each other ever since. Today the universe is st ill expanding, as astronomers have observed. The Steady State model says that the universe does not evolve or change in time. There was no beginning in the past, nor will there be change in the future. This model assumes the perfect cosmological principle. This principle says that the universe is the same everywhere on the large scale, at all times.2 It maintains the same average density of matter forever. There are observational evidences found that can prove the Big Bang model is more reasonable than the Steady State model. First, the redshifts of distant galaxies. Redshift is a Doppler effect which states that if a galaxy is moving away, the spectral line of that galaxy observed will have a shift to the red end. The faster the galaxy moves, the more shift it has. If the galaxy is moving closer, the spectral line will show a blue shift. If the galaxy is not moving, there is no shift at all. However, as astronomers observed, the more distance a galaxy is located from Earth, the mor e redshift it shows on the spectrum. This means the further a galaxy is, the faster it moves. Therefore, the universe is expanding, and the Big Bang model seems more reasonable than the Steady State model. The second observational evidence is the radiation produced by the Big Bang. The Big Bang model predicts that the universe should still be filled with a small remnant of radiation left over from the original violent explosion of the primeval fireball in the past. The primeval fireball would have sent strong shortwave radiation in all directions into space. In time, that radiation would spread out, cool, and fill the expanding universe uniformly. By now it would strike Earth as microwave radiation. In 1965 physicists Arno Penzias and Robert Wilson detected microwave radiation coming equally from all directions in the sky, day and night, all year.3 And so it appears that astronomers have detected the fireball radiation that was produced by the Big Bang. This casts serious doubt on t he Steady State model. The Steady State could not explain the existence of this radiation, so the model cannot best explain the beginning of the universe. Since the Big Bang model is the better model, the existence and the future of the universe can also be explained. Around 15 to 20 billion years ago, time began. The points that were to become the universe exploded in the primeval fireball called the Big Bang. The exact nature of this explosion may never be known. However, recent theoretical breakthroughs, based on the principles of quantum theory, have suggested that space, and the matter within it, masks an infinitesimal realm of utter chaos, where events happen randomly, in a state called quantum weirdness.4 Before the universe began, this chaos was all there was. At some time, a portion of this randomness happened to form a bubble, with a temperature in excess of 10 to the power of 34 degrees Kelvin. Being that hot, naturally it expanded. For an extremely brief and short period , billionths of billionths of a second, it inflated. At the end of the period of inflation, the universe may have a diameter of a few centimetres. The temperature had cooled enough for particles of matter and antimatter to form, and they instantly destroy each other, producing fire and a thin haze of matter-apparently because slightly more matter than antimatter was formed.5 The fireball, and the smoke of its burning, was the universe at an age of trillionth of a second. The temperature of the expanding fireball dropped rapidly, cooling to a few billion degrees in few minutes. Matter continued to condense out of energy, first protons and neutrons, then electrons, and finally neutrinos. After about an hour, the temperature had dropped below a billion degrees, and protons and neutrons combined and formed hydrogen, deuterium, helium. In a billion years, this cloud of energy, atoms, and neutrinos had cooled enough for galaxies to form. The expanding cloud cooled still further until toda y, its temperature is a couple of degrees above absolute zero. In the future, the universe may end up in two possible situations. From the initial Big Bang, the universe attained a speed of expansion. If that speed is greater than the universes own escape velocity, then the universe will not stop its expansion. Such a universe is said to be open. If the velocity of expansion is slower than the escape velocity, the universe will eventually reach the limit of its outward thrust, just like a ball thrown in the air comes to the top of its arc, slows, stops, and starts to fall. The crash of the long fall may be the Big Bang to the beginning of another universe, as the fireball formed at the end of the contraction leaps outward in another great expansion.6 Such a universe is said to be closed, and pulsating. If the universe has achieved escape velocity, it will continue to expand forever. The stars will redden and die, the universe will be like a limitless empty haze, expanding infinitely into the darkness. This space will become even emptier, as the fundamental particles of matter age, and decay through time. As the years stretch on into infinity, nothing will remain. A few primitive atoms such as positrons and electrons will be orbiting each other at distances of hundreds of astronomical units.7 These particles will spiral slowly toward each other until touching, and they will vanish in the last flash of light. After all, the Big Bang model is only an assumption. No one knows for sure that exactly how the universe began and how it will end. However, the Big Bang model is the most logical and reasonable theory to explain the universe in modern science. ENDNOTES 1. Dinah L. Mache, Astronomy, New York: John Wiley ; Sons, Inc., 1987. p. 128. 2. Ibid., p. 130. 3. Joseph Silk, The Big Bang, New York: W.H. Freeman and Company, 1989. p. 60. 4. Terry Holt, The Universe Next Door, New York: Charles Scribners Sons, 1985. p. 326. 5. Ibid., p. 327. 6. Charles J. Caes, Cosmolog y, The Search For The Order Of The Universe, USA: Tab Books Inc., 1986. p. 72. 7. John Gribbin, In Search Of The Big Bang, New York: Bantam Books, 1986. p. 273. BIBLIOGRAPHY Boslough, John. Stephen Hawkings Universe. New York: Cambridge University Press, 1980. Caes, J. Charles. Cosmology, The Search For The Order Of The Universe. USA: Tab Books Inc., 1986. Gribbin, John. In Search Of The Big Bang. New York: Bantam Books, 1986. Holt, Terry. The Universe Next Door. New York: Charles Scribners Sons, 1985. Kaufmann, J. William III. Astronomy: The Structure Of The Universe. New York: Macmillan Publishing Co., Inc., 1977. Mache, L. Dinah. Astronomy. New York: John Wiley Sons, Inc., 1987. Silk, Joseph. The Big Bang. New York: W.H. Freeman and Company, 1989. .uc2280406ff40c33d2644fb835edae668 , .uc2280406ff40c33d2644fb835edae668 .postImageUrl , .uc2280406ff40c33d2644fb835edae668 .centered-text-area { min-height: 80px; position: relative; } .uc2280406ff40c33d2644fb835edae668 , .uc2280406ff40c33d2644fb835edae668:hover , .uc2280406ff40c33d2644fb835edae668:visited , .uc2280406ff40c33d2644fb835edae668:active { border:0!important; } .uc2280406ff40c33d2644fb835edae668 .clearfix:after { content: ""; display: table; clear: both; } .uc2280406ff40c33d2644fb835edae668 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .uc2280406ff40c33d2644fb835edae668:active , .uc2280406ff40c33d2644fb835edae668:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .uc2280406ff40c33d2644fb835edae668 .centered-text-area { width: 100%; position: relative ; } .uc2280406ff40c33d2644fb835edae668 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .uc2280406ff40c33d2644fb835edae668 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .uc2280406ff40c33d2644fb835edae668 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .uc2280406ff40c33d2644fb835edae668:hover .ctaButton { background-color: #34495E!important; } .uc2280406ff40c33d2644fb835edae668 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .uc2280406ff40c33d2644fb835edae668 .uc2280406ff40c33d2644fb835edae668-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .uc2280406ff40c33d2644fb835edae668:after { content: ""; display: block; clear: both; } READ: Media Deprivation Sample Essay

US Social Security vs. Canadian Social Security

Introduction The increasing challenge posed by an increase in the elderly population creates the need to deploy social security services. Demographic patterns on the provision of social services are estimated to increase drastically in the future.Advertising We will write a custom research paper sample on US Social Security vs. Canadian Social Security specifically for you for only $16.05 $11/page Learn More In the United States, the notable demographic trends that are likely to impose significant pressures on social security includes the anticipated retirement of the baby boomers cohort, a reduction in the fertility rates and increases in life expectancy are estimated to pose a large increase in the old-age dependency ratio (Feldstein Liebman, 2002). The main purpose of this paper is to compare and contrast the United States with the Canadian social security system. The paper provides an overview of the United States and Canadian social security system , after which the paper discusses the objective similarities and differences between the two systems. In addition the paper also provides a subjective analysis that is based on the current evaluation of the United States social security system against the Canadian system. Basing on the research, the paper provides recommendations for improving the United States social security system. Introduction to the United States Social Security system In the US, social security mainly involves the Old-Age, Survivors and Disability Insurance (OASDI) scheme that is administered by the federal government. Social Security in the United States was first adopted during 1935; subsequent amendments have resulted to the inclusion of social welfare and social insurance. Major components of the United States social security also include the Supplemental Security Income, various unemployment benefits, offering aid to the needy families, grants issued to the states by the federal government for the purpose s of Medical Assistance Programs (Medicaid), Health Insurance for the Aged and Disabled (Medicare) and the Patient Protection and Affordable Care Act (Giles, 2005). Social security in the United States is mainly financed using dedicated payroll taxes that are referred to as the Federal Insurance Contributions Act tax. Social security in the United States is largely concerned with the benefits associated with retirement, unemployment, cases of disability, death and survivorship (Hyman, 2010).Advertising Looking for research paper on public administration? Let's see if we can help you! Get your first paper with 15% OFF Learn More Social Security in the United States is considered as the largest government program in the globe that takes a significant portion of the federal budget. In addition, social security is the biggest social insurance program in the United States. It is estimated that social security in the United States has helped to keep 40 percent of people aged over 65 years out of poverty. Introduction to Canadian social security Canadian social security comprises of approximately 2.3 percent of the Gross Domestic product, the Pay-as-you-go component Canadian social security is relatively small compared to the United States. Old Age Security (OAS) program is one of the core elements of elderly income transfers in Canada. The Guaranteed Income Supplement is used to increase the income levels for aged individuals in Canada. Another important element of Canadian social security is the Canadian Pension Plan and the Quebec Pension plan, which are mainly funded by the joint monetary contributions from employers and employees. Canadians contribute 4.95 percent tax on their income from USD 3500 to USD 41000 (Orszag Diamond, 2005). Social security in Canada mainly involves the government programs that are adopted with the main objective of offering assistance to its citizens and covers diverse programs that are mostly run by the provinces. In Ca nada, the social safety net is mainly concerned with the transfer payments that are directed at low income citizens only. It does not incorporate expenditures associated with healthcare services and education (Weisbrot Baker, 2001). Similarities between the United States and Canadian security services In the US, social security denotes the funds that the individuals pay during their working life, which mainly comprises of the retirement benefits during old age. This is a similar approach under the Canadian social security that is implemented using the Canadian Pension Plan. In the United States, employees contribute 5.65 percent of their earnings towards their social security and Medicare, which is used for offering medical insurance for aged and retired people.Advertising We will write a custom research paper sample on US Social Security vs. Canadian Social Security specifically for you for only $16.05 $11/page Learn More The social security premiums in the US are capped at earnings of USD 106,800 while there is no capping of the premiums for Medicare (Hyman, 2010). Canadians contribute 4.95 percent of their total earnings towards the CPP. Socialized healthcare plan in Canada are somewhat similar to the Medicare program in the context of the United States (Orszag Diamond, 2005). Another similarity between the United States and Canadian social security systems is that they both make use of the pay-as-you-go scheme, although the United States system is relatively high compared to the Canadian system. Bo the social security systems can be considered to a hybrid between the PAYGO plan and a fully financed program (Hyman, 2010). Differences between the United States and Canadian social security system A notable difference between the two systems is the scope of coverage of social security. In this context, the Canadian social security system does not have provisions for education and healthcare expenditure, which are provided in the social security system in the United States (Giles, 2005). The second difference between the two systems is that the United States expenditures on social security are relatively higher compared to the Canadian expenditure on social security. For instance, the Old Age and Survivors comprise of 6 percent of the United States GDP, compared to Canada that allocate 4.2 percent of its GDP. In addition, Canada spends relatively twice as much as the amount that the United States spends on unemployment benefits (Hyman, 2010). Another difference between the two systems is that the CPP is a reserve fund that is invested in the market; this is contrary to the social security funds that are invested in government securities and bonds. Investing the CPP in the market resulted to 5 percent marginal difference between the returns in the United States and Canada. Evaluation of current US system against the Canadian system It is arguably evident that Canadian social security has a better establishme nt compared to the United States social security system. There is a potential that the Canada Pension Plan fund will grow since it is invested in the market, making significant contributions towards its future sustainability compared to the United States social security funds that are invested in government bonds. Another reason that contributes to the effectiveness of the Canadian pension Plan when compared with the US social security system is that the benefits of the CPP are relatively lower compared to the benefits of the United States social security. The generosity of the United States social security questions its sustainability in meeting the future demands posed by the aging population (Weisbrot Baker, 2001).Advertising Looking for research paper on public administration? Let's see if we can help you! Get your first paper with 15% OFF Learn More Recommendations to improve the United States social security system Improving the efficiency of the United States social security requires the reinforcement of insurance and financing. With regard to insurance, it is important to maintain an appropriate balance in terms of social and individual responsibility. With regard to financing, establishing a suitable balance between pre-retirement funding and the use of the common PAYGO method will serve to address the potential challenges imposed by the demographic trends in the United States. References Feldstein, M., Liebman, J. (2002). The Distributional Aspects of Social Security and Social Security Reform. Chicago: University of Chicago Press. Giles, C. (2005). US social security is among least generous. Web. Hyman, D. (2010). Public Finance: A Contemporary Application of Theory to Policy. New York: Cengage Learning. Orszag, P., Diamond, P. (2005). Saving Social Security-A Balanced Approach. Washington DC: Brookings Institution Pres s. Weisbrot, M., Baker, D. (2001). Social Security: The Phony Crisis. Chicago: University of Chicago Press. This research paper on US Social Security vs. Canadian Social Security was written and submitted by user Silas Richards to help you with your own studies. You are free to use it for research and reference purposes in order to write your own paper; however, you must cite it accordingly. You can donate your paper here.

Designing and Managing the Supply Chain, Chapter 1 Questions Essays

Designing and Managing the Supply Chain, Chapter 1 Questions Essays Designing and Managing the Supply Chain, Chapter 1 Questions Essay Designing and Managing the Supply Chain, Chapter 1 Questions Essay PROC 5850 Week 1 Homework: Ch1 Question 1,2,6 1. Consider the supply chain for a domestic automobile. a. What are the components of the supply chain for an automobile? The components of the supply chain for an automobile are as follows: First you have the supplying industries. These include components such as steel and other metals, rubber, electronics, plastic, glass, and textiles. These raw components are fabricated into car bodies, mechanical and electrical subcomponents as well as engines and transmissions. These subassemblies are assembled during final assembly and then distributed to dealership for the consumer market. b. What are the different firms involved in the supply chain? The following are a selection of firms involved in the supply chain: Suppliers, Manufactures, Transportation companies, Warehouses and distributions centers, sub-contractors, dealerships, and customers. c. What are the objectives of these firms? The simple objective of these firms is to maximize market share and make a profit. Every challenge to operate the supply chain supports these two primary goals. d. Provide examples of conflicting objectives in this supply chain? The supplying industries would like the automobile manufacture to commit themselves to purchasing large quantities with stable volumes with flexible (long-lead) dates. On the manufacture’s side, they need to be flexible to their customers’ need and the change in demands. So what we have is a direct conflict of interest between the suppliers’ and manufactures’ desire for flexibility. The ability to optimally match supply and demand is just as much an art and it is a science. Other conflicts arise with transportation of smaller batches versus larger batches of supplies. Usually the smaller and faster a batch of supply is required, the cost of transportation increase; another conflicting objective. e. What are the risks that rare or unexpected events pose to this supply chain? An unexpected risk such as a natural disaster can bring the supply chain to a stand still. However, such events can almost never be managed. There are some challenges such as matching supply and demand risks, lead times, forecasts, transportation times and costs, which can be â€Å"managed† or operational risk management used to minimize risks. 2. Consider a consumer mortgage offered by a bank. f. What are the components of the supply chain for a mortgage? There are several components of the supply chain for a consumer mortgage offered by a bank. First, there are marketing companies that solicit to prospective customers. Secondly, the bank needs to be able to evaluate potential customers by using credit-reporting companies. Thirdly, usually a third party bank that extends the mortgage loans. Lastly, the bank requires mortgage brokers that distribute the loans. g. Is there more than one firm involved in the supply chain? What are the objectives of the firm or firms? Marketing companies try to increase the responses from prospective homebuyers to maximize their returns. The banks try to find customers that are a relatively low risk, on-time payments, and low average maturity date; i. e. , maximize profits. The mortgage broker is all about maximizing his commission of the sell of the property. . What are the similarities between product and service supply chains, what are the differences? Both product and service supply chains provide a need. The difference is the type of service, instead of the physical product†¦ faster, better, cheaper all apply. Some of the differences between the two types of supply chains are as follows: * With the product supply chain there is both the flow of physical and infor mational products. However, in the service supply chain, the product is mostly information. Unlike the service supply chain, inventory and transportation of goods are a major costs of product supply chains. * Since service supply chains usually don’t carry inventory, coordinating capacity with demand is usually more important. * The cost of information is more often higher than in a product supply chain. Consider the cost of a credit report or hiring a consultant. 6. Consider the supply chain for canned peaches sold by a major food-processing company. What are the sources of uncertainty in this supply chain? Some of the sources of uncertainty are as follows: The first factor to consider is the peach crop and the factors that effect it†¦ weather, disease, and disasters. * Number if migrant workers available to harvest the crop†¦ spoilage. * Lead times from field to processing plant†¦ spoilage. * Processing time, storage, and transportation times and costs. * Dem and is not know beforehand. CASE: Meditech Surgical 1. What are Meditech’s problems in introducing new products? In manufacturing ALL products? Meditech has two major issues with introducing new products. * It has poor service levels for new products The inventory levels are higher than necessary for all of its products 2. What is diving these problems, both systematically and organizationally? There are seven major areas in which Meditech is driving these problems: * In the planning system, there are too many built-in delays and monthly buckets. This leads to inefficacies, unneeded delays, and high inventory levels. * There is no tracking of forecasting errors. * Product demand is poorly studied. * The Info Systems used to record and monitor inventory are not integrated and inadequately designed. Because Meditech does not normally see the end-customer, it has to overcome failures of communications with them†¦ hording/panic orders is one example of this failure to commu nicate with end-customers. * The poor planning system is use magnifies variations in demand. * Panic ordering. 3. Why is the customer service manager the first person to recognize the major issues? He was the person who directly received customer complaints. In his position he was able to determine the scope of the problems. Other managers were not in positions to be aware of customer satisfaction. 4. How would you fix these problems? There are several ways to fix the problems Meditech is facing. The first and most important is improving communications with customers†¦ Five â€Å"Y†Ã¢â‚¬â„¢s. Another way to improve their SCM is to develop better demand forecasting systems and accountability for their forecasts. Furthermore, Meditech needs to integrate, implement, and improve their information systems. They could easily eliminate bulk inventory by putting assembly within the pull system; i. e. , get rid of the â€Å"push-pull† system. Lastly, they could implement a planning system to decrease planning delays (or just use M. S. Project) and reduce system time buckets.

6 MBA Interview Mistakes to Avoid

6 MBA Interview Mistakes to Avoid Everyone wants to avoid making mistakes so that they can put their best foot forward during an MBA interview. In this article, were going to explore some of the most common MBA interview mistakes and analyze how they can hurt your chances of getting accepted into an MBA program.   Being Rude Being rude is one of the biggest MBA interview mistakes an applicant can make. Manners count in professional and academic settings. You should be kind, respectful, and polite to everyone you encounter - from the receptionist to the person who interviews you. Say please and thank you. Make eye contact and listen attentively to show that you are engaged in the conversation. Treat every person you speak with - whether it is a current student, alumni, or the director of admissions - as if he or she is the one making the final decision on your MBA application. Finally, dont forget to turn off your phone before the interview. Not doing so is incredibly rude. Dominating the Interview Admissions committees invite you for an MBA interview because they want to know more about you. Thats why it is important to avoid dominating the interview. If you spend the entire time asking questions or giving lengthy answers to every question youre asked, your interviewers wont have time to get through their list of questions. Since most of what you asked will be open-ended (i.e. you wont get a lot of yes/no questions), youll have to temper your responses so that you dont ramble. Answer each question fully, but do so with a response that is measured and as concise as possible. Not Preparing Answers Preparing for an MBA interview is a lot like preparing for a job interview. You pick out a professional outfit, practice your handshake, and above all, think about the type of questions the interviewer might ask you. If you make the mistake of not preparing your answers to common MBA  interview questions, youll end up regretting it at some point during the interview. Start by thinking of your answers to the three most obvious questions first: Why do you want an MBA?Why did you choose this business school?What do you want to do with your MBA after graduation? Then, perform a bit of self-reflection to consider your answers to the following questions: What are your strengths and weaknesses?What is your biggest regret?What are you passionate about?What can you contribute to an MBA program? Finally, think about the things that you might be asked to explain: Why does your resume show gaps in your work experience?Why did you perform poorly in undergraduate classes?Why did you decide not to retake the GMAT?Why didnt you provide a recommendation from a direct supervisor? Not Preparing Questions Although most of the questions will come from the interviewer, you will probably be invited to ask a few questions of your own. Not planning out intelligent questions to ask is a big MBA interview mistake. You should take time before the interview, preferably several days before the interview, to craft at least three questions (five to seven questions would be even better). Think about what you really want to know about the school, and make sure the questions are not already answered on the schools website. When you get to the interview, dont spring your questions on the interviewer. Instead, wait until you are invited to ask questions. Being Negative Negativity of any kind wont help your cause. You should avoid badmouthing your boss, your co-workers, your job, your undergraduate professors, other business schools that rejected you, or anyone else. Criticizing others, even lightly, wont make you look better. In fact, the opposite is likely to occur. You could come across as a whiny complainer that cant handle conflict in professional or academic settings. That is not an image you want to project onto your personal brand. Buckling Under Pressure Your MBA interview might not go the way you want it to. You might have a tough interviewer, you might be having a bad day, you might misrepresent yourself in an unflattering way, or you might do a really poor job of answering a question or two. No matter what happens, it is important that you keep it together throughout the interview. If you make a mistake, move on. Don’t cry, curse, walk out, or make any type of scene. Doing so demonstrates a lack of maturity and shows that you have the potential to buckle under pressure. An MBA program is a high-pressure environment. The admissions committee needs to know that you can have a bad moment or a bad day without completely falling apart.

The Advantages of Paying Cash Essay Example | Topics and Well Written Essays - 750 words

The Advantages of Paying Cash - Essay Example It should be noted that compared to credit cards, cash payments make an individual more conscious of his expenditures, exempt him of annual charges, and motivates the individual to save.As opposed to cash payments, credit cards allow an individual to spend more than the money that he actually has. For example, when shopping a person with credit card tend to spend more on items that he does not necessarily need. With cash, a person will be constrained by the amount that he carries.Secondly, without credit cards, an individual is exempt from paying annual fees and other interest charges. The $200 charge by companies annually is often enough to purchase some necessities. Also, interest charges are additional expenses which one doesn't want to shoulder.Lastly, cash payments motivate a person to save. It should be noted that since you only spend what you have, you are not tempted to allot money for unnecessary purchases. This together with the absence of financial charges motivates you to save money.If I am faced with the important decision of choosing the place where I want to spend all my life, I will choose to stay in the city. Away from the solace and the boredom of the small town, a city provides a quality of life which will enable me to develop my strengths to the fullest. The big city often offers the best schools in the country, the more exciting and challenging job opportunities, and the best companies to work for. I always believe in developing my competencies through education which can be best secured by a huge and reputable university in the city. Universities in big cities often invest so much in the quality of the education that they offer thereby allowing their students to be the best in their respective fields. Secondly, there are more job opportunities in the city. In a small town, jobs are limited and are often non-challenging to an adventurous person like me. In a big city, jobs require the completion of tasks which are more exciting. Having these tasks will enable me to learn more. Big cities also house the best companies to work for. Recognizing the quality of the people that they have, these companies offer huge compensation together with nonfinancial rewards. Working with the best company also has the advantage of working with the best in the industry. A big city represents the life that I choose for myself. As opposed to the small, quiet town it provides opportunities of growth for me. In the big city, I can be equipped with better education, work more challenging jobs, and can be a part of the world's best organizations. How to Do Your Laundry Who says that you always need to bring your dirty clothes in the laundry shops for cleaning It is often disappointing to find out that people are relying so much and paying for these services when washing clothes is just an easy task. Doing your laundry can be done in three major steps namely, the pre-washing preparations, the actual washing, and drying. In order make washing easier, it is best to always separate the colored from the whites. This way, the colors will be maintained and color fast clothes are also protected. Before putting them in the washing machine, all foreign objects such as clips, pens, wallets, and other should be removed from the clothes. Also, it is best to prepare the machine by following the manufacturer's instructions. During the actual washing, the procedure of the washing machin

The Personal Responsibility and Work Reconciliation Act Research Paper

The Personal Responsibility and Work Reconciliation Act - Research Paper Example This essay discusses that the current gender gap is not because women are less skilled than men but because now women demonstrate a higher propensity to attend college than men. Inequality in pay is due to the high extent of women’s segregation because of the nature of jobs. Hence, it can be said that women are now increasingly involved in competing with men in the job market. It is now required to eliminate the gender pay disparity because if single working mothers start earning as much as men there will be an increase of about 18 percent in the family income and the poverty will be reduced considerably. Major reforms relative to PRWORA have been in welfare fields such as housing, health care, child care and food. The federal government has allocated larger budgets for child care programs, which is evident from the fact that federal funding for child care has increased by almost 100 percent since the PRWORA was implemented. But some problems remain such as only about 12 perce nt of eligible households receive financial help under provisions of the Child Care and Development Fund. All families are not able to get benefits of state and federal schemes relative to child care, while tax exemptions continue to be meager in assisting families to adequately meet childcare costs. Additionally, the quality of child care is still poor because child care workers continue to be paid less. Even though there has been enhanced funding by the federal government in regard to child care, the pay of childcare workers has been stagnating.... Consequently, the outcomes of the PRWORA have been disputed and political campaigners have claimed either total success or failure depending upon their affiliations. At the same time, some facts cannot be denied such as the drop in volumes by about fifty percent in welfare relative to AFDC and TANF in spite of the several provisions that extended benefits external to the given rules. According to Boushey (2011), it is now evident that most of the former welfare recipients do not have work and those that are working earn between $6 and $8 per hour, which is too meager to sustain a family. The extent of poverty has increased amongst working families despite the decline in over all poverty rates. Families headed by single working mothers are the worst effected in this regard. Moreover, poverty has become more severe during the last many years for families that were already in deep poverty. Many families that were receiving welfare prior to the implementation of PRWORA are likely to expe rience greater hardships after they leave welfare. Over 33 percent of families getting welfare experienced situations when they were unable to get adequate food and the required medical care as compared to the position prior to the introduction of PRWORA. Families having one full time worker stood just a little less chance of experiencing one or more of such difficulties in comparison with the present welfare families. Almost 25 percent of families that became ineligible for welfare and had a single earning member went without adequate food, housing and the essential medical facilities. Most of the objectives of PRWORA pertained to addressing the high rate of single parenthood amongst poor households. It

Effective Presentations Essay Example for Free

Effective Presentations Essay Presentation is used to summarize, defend or even argue important ideas to an audience. Thus, the beginning of the presentation gains the attention of audiences and establishes its purpose. Selecting the context, designing the learning experience and producing efficient, effective and appealing presentation can be easy though it is the hardest part (Courses Surveys, 1977). To produce an appealing presentation, one should keep the design short and simple in order to produce effective design. The color should be used to emphasize a word or use a transition to disclose the answer to a question. The designer should evade the confusion. It is better off to have extra white space than having irrelevant piece of clipart that can be distracting. Fewer words should be chosen rather than more words and use closely cropped photographs than cluttered distance shot (Courses Surveys, 1977). The viewers should be kept focused and interested. This can be done by using key phrases and including only essential information. The word should be limited and simplified and avoid using of much bullets per slides. The presentation should be easy to follow by keeping the important information visible. The punctuation and font case should be considered. For instance, use of all caps makes the statements more difficult to read. The font size and type used should be simple and easy to read. Thus the designer should avoid using fancy and script fonts as they are hard to read on the screen. The font type and size should be visible to the audience and uniform throughout the presentation (Courses Surveys, 1977). Consequently, the background colors and that of the text should be contrasting. It is preferred to use dark text on a light background. Color should be toned down to make the light colors easy on the eyes. Patterned or textured backgrounds reduce readability of the text. The color scheme used should remain consistent throughout the presentation. In addition to that, when using a theme or template for a design, it should be appropriate to the audience. Therefore, a layout should be straightforward and clean if the design is aimed for business and if aimed the audience to be young children, it should be full of colors and variety of shapes (Courses Surveys, 1977). The number of slides should be limited to ensure that the presentation will not be too long and drawn out. This prevents the problem of continually changing the slides during the presentation which can be a distraction to the audience or viewers. For the presentation to be effective and more attracting there should be a combination of photos, charts, graphs and even embedded digitalized video with text to add variety and keep the presentation interested to the viewers. In addition, excessive use of animation and transition should be avoided. This is because the audience can be distracted by too much of the transitions and animation bearing in mind that slide shows is meant to be a visual aid but not a focus of the presentation. Also animation should be consistent in the presentation by using of animation schemes and the same transitions should be used throughout the presentation (Courses Surveys, 1977). Finally, the designer or rather the presenter should make sure that his/her presentation can run on any computers. This can be done by using PowerPoint’s package for CD or Pack and Go features when burning the presentation to CD. This will facilitate the presentation to be viewed by much audience. Summarily therefore, an effective and efficient presentation is usually planned, organized, and tailored to a specific audience to help facilitate the behavior change, desired by the presenter. Presentations always engage face-to-face communication and can be made on a one-to-one basis or can be given to a very large group (Courses Surveys, 1977). References Courses, E. Surveys, T. (1977) The Computer for the Professional: Effective Presentations Microsoft ® PowerPoint ® tutorial, Preparing Presentation Slides Tutorial, Presenting Effective Charts and Graphs Tutorial, and 8 Secrets to a Knockout Business Presentation, New York: Prentice Hall.

Mutualism of Rhinz Essay -- Biology, Symbiosis

Symbiosis refers to a relationship in nature, between two organisms. It can exist in any of 3 forms. These are mutualism, commensalism, and parasitism. Each of these are different symbiotic systems in which at least one of the organisms benefits from the relationship. In a mutual relationship, both organisms will benefit in one way or another. In a commensal relationship, one organism will benefit from the partnership, while the other will not be hurt or benefitted. Finally, in a parasitic relationship, one organism will benefit from the partnership while the other organism will be harmed or even killed. The focus of this paper is mutual symbiosis found in nature (Patek, 2011). Symbiotic mutualism is a partnership in which both organisms will benefit from the relationship. This relationship beneficial to both organisms thus is beneficial to the ecosystem, indirectly. An example of this relationship, found in nature, is that of rhizobia and legumes. In this relationship, both the rhizobium and the legume on which it strives, benefit, in that the legume is enriched with nitrogen and amino acids by the rhizobium, while the rhizobium is given the important organic molecules which act as an energy source for the bacteria (Kiers et. Al., 2003). The nitrogen in this reaction is a very important nutrient, as it is a driving force of many photosynthetic processes. This process is carried out by the rhizobium bacteria attaching to a nodule on the root hair of the legume plant, taking nitrogen from the air and converting it to a form usable by plants (NH4) utilizing the enzyme nitrogenase, and in return receive the growth molecules it requires (Denison & Kiers, 2004) . Both organisms do benefit from the partnership they share; however, thi... ...c relationship with legume roots. However, this symbiotic relationship, in specific, can exist in one of two forms, either mutual or parasitic. Although the strand which exhibits mutualism most prominent among rhizobial populations, the parasitic strand does exist, yet is slowly being eradicated by the constantly evolving legumes. Researchers have studied the different strands of the bacteria, and have attempted to conclude on the efficiency of both separate strands. Each has concluded that although the parasitic strands have much less work to do to obtain the essential molecules to aid it in growth, it obtains a significantly smaller amount of the growth molecules, if any. This is because through evolutionary pathways of the legume roots, the parasitic strand is selected against, and the legume favors the more hard-working mutual strand of the rhizobium bacteria.

Cream Cracker Under The Settee

The name of the play that we are studying is ‘Cream Cracker under the Settee'. This play was written in 1987 by a middle aged Alan Bennett who was born in Leeds in 1934. He grew up through the Second World War and in his play he writes about how views on life have changed over the years. The play is part of the ‘Talking Heads' series of plays in the 1980's. ‘Cream Cracker' is a dramatic monologue in which Doris, a 75 year old â€Å"lady of leisure†, speaks throughout. Doris is played by Dame Thora Hird who has just recently passed away. The play explores the changes within society from when Alan Bennett was a child, through the sixties and to the 1987. In the 1960's, the younger generations were getting most of the love and care from the family but the elderly were beginning to be seen as a hindrance. The play also explored how people had changed with the feeling that it was necessary to lock their doors and to be very secure rather than leaving the door open like they did in the ‘olden days'. Doris' personality changes throughout the play, as in the beginning, Doris wants to be independent but Zulema, Doris' care worker, has forbid her from doing any housework. This enrages Doris as she believes Zulema doesn't clean her house properly as she says â€Å"Zulema doesn't dust. She half dusts†. This is pointing out that Doris is quite fussy with the help that she receives from Zulema and doesn't seem to be grateful for any of it. There is proof that Doris is correct about the way Zulema dusts when she finds an old cream cracker under the settee. Doris intends on keeping the cream cracker to send off to social services to show that Zulema doesn't dust her house. This shows that Doris is quite spiteful. Later on in the play, Doris seems to be quite dull but she also recites quite a few conversations that her late husband Wilfred and she had. An example of which is when she spoke about the garden and that Wilfred wanted to have a bush but Doris wanted concrete. Wilfred argued about it having non character but Doris wanted it because of the hygiene. This shows that Doris is quite obsessive about hygiene and now she has to try and keep her house tidy otherwise she believes she will be put in Stafford House, an elderly home, but in fact, it is the other way round. By cleaning Doris is putting herself at more risk of being put in Stafford house as she is not very good on her feet and suffers from dizzy spells and has a pacemaker. This will make the audience feel sorry for her and will make them hope that she doesn't fall or be moved to Stafford House. The way in which Doris speaks makes her seem very realistic and can help people in the audience relate to her in many ways e.g. you could relate to someone you know such as an elderly relative when she's breathless. This makes it feel as if you know Doris more than you actually do and makes her seem like a real person who would be very easy to like. She also brings up past conversations she has been a part of as I mentioned before which help the audience to become more interested in the play as they are finding out what Doris is like and what kind of things she chatted about with her husband. Doris' life story is quite a moving, involving and very emotional journey. Alan Bennett makes the story very interesting and even more involving by making the actress look directly into the camera and making her seem like she's upset and choking through her sentences. She tells the audience about the way that, when Wilfred and she were younger, they were trying for a baby and when they were having the baby, it was a still birth. The midwife then wrapped the baby boy, who Doris wanted to call John, in newspaper and Doris was horrified by this. She saw this action as saying that the baby was dirty and that it was worthless. By the time Doris had awoken, the baby had gone. This makes this part of the play very sad and distressing. There are many unseen characters in this play which Doris interprets in her own special way. She mimics a lot of the characters, especially Zulema, and she is also talks quite sarcastically about Zulema in the way she talks to her. You see this when Zulema says about Doris being unable to run around with the Ewbank and all Doris says in reply is â€Å"Yes, Zulema.† This would make the audience feel sorry for Doris but in the same way happy that she isn't going to let Zulema boss her around. Another character that is introduced by Doris is Wilfred. We first hear of Wilfred when Doris knocks the photo of the two of them from the mantel piece when she attempts to dust and falls off the buffet. This would make the audience gasp in shock and feel sympathetic for her when she says â€Å"we're cracked Wilfred†, which means she is referring to her leg as she may have broken it and that their marriage is cracked. There are a few other characters used in the play such as the little boy who pees in the garden, which shows how disrespectful young children are nowadays, the neighbours whose leaves blow onto Doris' garden and the policeman who comes to check on her at the end of the play. These characters are all well timed to come into the play as it breaks the scenes up nicely and is like a chapter in the story being broken by turning the page. If Alan Bennett hadn't put these breaks in the play could have become a bit boring. Alan Bennett uses his genius and past experiences to make the play realistic by making Doris very able to relate to. A lot of old people from the same era as Doris are very reluctant to change like when Doris is in her own home and Zulema mentions Stafford House, she becomes all defensive and wary of what might happen next. This will create a lot of interest as people may be threatening their elderly relatives with being placed in a home if they cannot cope on their own and then the people will be able to see how it could be affecting them.

Ageism: How Children and Teens Are Unfairly Stereotyped

Ageism: How Children and Teens are Unfairly Stereotyped Jazzie Collins Pacific High School Abstract Over the years, children and teens have been portrayed as immature and sometimes even stupid. Many adults think that they are incapable of many things and deserve no respect. However, young people have made many accomplishments in history. They have invented things and some have even become emperors. Kids and teens deserve more respect than they are getting. Children and teens are constantly being degraded as â€Å"stupid† and immature†. They are put down and disrespected just for their age and adults often see them as incapable, weak and silly. In some cases they could be considered right but believing that all children are foolish is completely wrong. â€Å"Children should be seen, not heard,† a phrase often heard in olden times and even sometimes today, is a prime example of ageism. It is degrading to them as human beings. The law enabling citizens in America to have freedom of speech does not exclude children and teenagers. If it did, there would be many things today that we would be without. Many inventions we have now came from the minds of young ones. For example, the earmuffs, a popular and stylish way to protect your ears from the bitter cold of winter, were invented by a 15 year old boy from Maine. The protective winter gear called Wristies was created by a 10 year old girl in the year 1994. There are numerous inventions from the minds of teens and children. Chester Greenwood, living in Farmington, Maine, invented earmuffs at the age of 15. While testing out a new pair of ice skates, he became frustrated with trying to protect his ears from the harsh cold. Feeling very bulky, itchy and, overall uncomfortable, his scarf did no help. So instead, he made two ear-shaped loops from wire and had fur sewn into them by his grandmother. Chester then improved them by adding a steel bar to the top of the separate ear muffs, helping to hold them in place on a person’s head. Afterwards, he had the new and enhanced version of his invention patented. Then, with Greenwood’s Champion Ear Protectors, he established Greenwood’s Ear Protector Factory and made a large fortune supplying ear muffs to U. S. soldiers during World War I. Chester then went on to patent many more inventions. In 1977, Maine’s legislative declared December 21 as â€Å"Chester Greenwood Day† to honor Chester Greenwood as a great contributor to cold weather protection. Another form of winter gear coming from the mind of a child was something called a Wristie. Wristies resemble wrist bands and are designed to worn under a coat and gloves to block out the wind, snow and cold from entering any unprotected gaps. The brain behind these was a 10 year old from Bedford, Massachusetts named Kathryn Gregory. Kathryn invented and trademarked Wristies and, also while a kid inventor, started Wristies Inc. , a company that manufactured and sold Wristies. The young entrepreneur has made deals with the Girl Scouts, Federal Express and McDonalds and in 1997, Kathryn Gregory became the youngest person ever to sell on QVC, the television shopping show. Kathryn Gregory may have been the youngest person to ever appear on QVC, but King tut was the youngest Egyptian pharaoh to ever rule over Egypt in ancient times. When Tutankhamun’s father died, coincidentally right after being forced to step down from his throne, Tutankhamun was made pharaoh at the young age of 9. In that same year, he married his half sister Ankhesenpaaten. King Tut, as he was later known as, then became the youngest ruling Egyptian pharaoh. He is still famous today due mainly to his great wealth and young age of ruling. Adults aren’t always wiser than children and teens. In many households, the child has to take care of their parent or guardians whether it be financially, mentally, physically or sometimes all three. Usually, when the cold or teen is taking care of their parent or guardian financially, it is because the adult either blows all of their money on drugs and alcohol, the adult was laid off their job and has yet to find another or sometimes, the adult is simply incapable of working. In any case, the responsibility is left up to the minor to pay bills and put food on the table. Another kind of situation that is quite common is in households where the parents or single parent has undergone an injury or has acquired some sort of mental disability and are unable to really take care of themselves. It is also present in households where something has happened in the parent or guardian’s life and they’ve slipped into such a depression that they no longer care for anything, leaving their kids to take on the responsibility of caring for not only the adult in the house but also for themselves and each other. They then must make sure things get done such as putting food on the table and making sure the bills are paid. In the movie/novel â€Å"What’s Eating Gilbert Grape†, a young man named Gilbert Grape must take on the responsibility of taking care of his morbidly obese mother and brother, Annie, who is mentally handicapped. Gilbert Grape must also repair their old farmhouse all on his own because of his father’s death. Ever since his father’s death, Gilbert’s mom has been able to do nothing else but eat, leaving her unable to care of neither her children nor herself. A real-life example of a situation of the child having to care for their parent is that of a girl named Rebekah Knerr. Ever since Rebekah Knerr was very a young (around the age of 2), her father has had a mental illness causing him to disappear off to somewhere for long periods of time without telling anyone where he is whenever he gets too stressed. Because of this illness, he will disappear for a few days up to, at the most, 2 weeks. Ever since Rebekah was young, she has had to take care of her dad by going along with him everywhere he goes and making sure he doesn’t wander off. It is a very stressful and aggravating job and requires a great amount of maturity and patience. An amount of maturity and patience teens and children are often underestimated of. When it comes to teens and children, credit it almost never given to the ones who truly deserve and have earned it. It is almost non-existent. But those who look down upon them are fools themselves, because children and teens everywhere show more strength and maturity the adults in their lives. Some kids are young inventors and others are entrepreneurs and created many of the wonderful and handy inventions we have today. There is definitely more to children and teens that meets the adult eye. References Life of King Tut. (2009). Retrieved January 6, 2010, from http://www. king-tut. org. uk/life-of-king-tut/index. htm

Free Essays on FAR 135 Maintenance

Many pilots aspire to fly bigger, faster, and more complex aircraft than where they currently are. It’s this â€Å"always forward† attitude that pushes pilots to the next level of aviation. Does this same attitude apply in maintenance? If so, such things as opening a maintenance shop are the first step. This is equivocal to a private pilot’s license. For some this is all they want, for others this is just the beginning. Such is true in aviation maintenance. The maintenance shop, for many, is just the first step. This is followed possibly by becoming a repair station, upgrading to being able to do overhauls, or possibly becoming a service center for a manufacturer. One possible step is opening your maintenance facility to handle 135 charter aircraft. 135 charter aircraft is often times a way that smaller maintenance facilities use to increase business. What this means is that they work on aircraft that fly charter operations, regulated under FAR (federal aviation regulation) 135. This regulation and all FARs can be found under CFR (Code of Federal Regulations) chapter 14. So what does 135 mean? Why is it different from all other GA (general aviation) aircraft? Well, first of all these are general aviation aircraft, used as on-demand charter aircraft. Since these aircraft are used for hire on-demand they are regulated differently than the aircraft that are not for hire; those aircraft are regulated under FAR 91. As such they also contain different maintenance requirements than part 91 aircraft. This paper is an outline of some of the major differences between the two types. If you are operating an aircraft for hire under the operational rule FAR 135, you are required to provide the FAA an adequate maintenance program for each aircraft on your certificate during the application process. For aircraft certified to carry less than 10 passengers, the FAA has historically allowed the use of the aircraft manufacturers’ ... Free Essays on FAR 135 Maintenance Free Essays on FAR 135 Maintenance Many pilots aspire to fly bigger, faster, and more complex aircraft than where they currently are. It’s this â€Å"always forward† attitude that pushes pilots to the next level of aviation. Does this same attitude apply in maintenance? If so, such things as opening a maintenance shop are the first step. This is equivocal to a private pilot’s license. For some this is all they want, for others this is just the beginning. Such is true in aviation maintenance. The maintenance shop, for many, is just the first step. This is followed possibly by becoming a repair station, upgrading to being able to do overhauls, or possibly becoming a service center for a manufacturer. One possible step is opening your maintenance facility to handle 135 charter aircraft. 135 charter aircraft is often times a way that smaller maintenance facilities use to increase business. What this means is that they work on aircraft that fly charter operations, regulated under FAR (federal aviation regulation) 135. This regulation and all FARs can be found under CFR (Code of Federal Regulations) chapter 14. So what does 135 mean? Why is it different from all other GA (general aviation) aircraft? Well, first of all these are general aviation aircraft, used as on-demand charter aircraft. Since these aircraft are used for hire on-demand they are regulated differently than the aircraft that are not for hire; those aircraft are regulated under FAR 91. As such they also contain different maintenance requirements than part 91 aircraft. This paper is an outline of some of the major differences between the two types. If you are operating an aircraft for hire under the operational rule FAR 135, you are required to provide the FAA an adequate maintenance program for each aircraft on your certificate during the application process. For aircraft certified to carry less than 10 passengers, the FAA has historically allowed the use of the aircraft manufacturers’ ...

The Prefix Co-

The Prefix Co- The Prefix Co- The Prefix Co- By Mark Nichol If you’re the betting type, and you wager on whether a given word beginning with a prefix is attached directly to the root word or linked with a hyphen, bet against the hyphen: The trend- in American English, at least- is to close prefixed words and compound words. However, you won’t always win, because there are exceptions, even among words beginning with a particular prefix. Take the prefix co-, for example. Using the Merriam-Webster’s website as the authority, we can see that virtually every word beginning with the prefix is closed. Exceptions include most words in which the root word begins with o, including co-official, co-organizer, and co-owner. Co-op takes a hyphen when it serves as an abbreviation for cooperative, even though the full term is not hyphenated- though it, like many other words containing prefixes, once was. (However, the unrelated term coop, referring to a shelter for birds or other animals, has no hyphen.) In British English, which is generally more conservative about orthography and word treatment, the correct form is co-operative (and co-operate and co-operation). Co-opt, however, is standard in both dominant forms of English. An all-but-obsolete treatment of such words to signal that the o’s are separated by a syllabic break- this style quaintly persists in the pages of the New Yorker- is the inclusion of a diaresis (two dots) over the second instance. Avoid attempting to attach the prefix to a phrase, as in â€Å"co-personal assistant,† which fails because it describes an assistant who is co-personal, not a personal assistant who shares responsibility with another person holding that title. A natural solution is to employ a slightly sturdier en dash in place of the hyphen to convey the prefix’s relationship to the entire phrase, not just the first word (equivalent to the stronger symbol’s usage in such phrases as â€Å"pre–Industrial Revolution†), but this strategy is not standard; instead, merely substitute co- with fellow. Finally, avoid the prefix altogether if it is always redundant, as in copartner, and consider doing so if, in context, it is often so, as in co-conspirator. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Spelling category, check our popular posts, or choose a related post below:100 Beautiful and Ugly WordsWhat is the Difference Between Metaphor and Simile?Drama vs. Melodrama

Analysis of Mise En Scene Essay Example | Topics and Well Written Essays - 500 words

Analysis of Mise En Scene - Essay Example This essay examines the mise-en-scene in this closing sequence. The closing sequence of Chinatown begins with Jack Gittes (Jack Nicholson) conversing with Evelyn Mulwray (Faye Dunaway). The two characters are featured in a medium close-up, with their bodies cut-off. While the film’s plot is highly complex and entangled, at its core it is a strong character piece. The minimalist mise-en-scene of this conversation, with the two characters featured alone in the foreground highlights the film’s strong character-centered nature. It’s also notable that Jack retains the bandage from earlier in the film, as this is symbolic of his ultimate fallibility in comparison to Mulwray almost angelic quality. This minimalist conversation scene cuts to a montage of shots of Chinatown. The city is depicted through neon lights that shine brightly in an all-dark background. The effect is powerful as the neon lights take on a sort of Las Vegas like feel where the outward brightness seems to conceal a sinister interior. The film’s nighttime setting further accentuates its neo-noir conventions. Indeed, this becomes a predominant thematic element as the final film sequence unravels. Not only is the scene shrouded entirely in darkness, but so are the characters. Only on brief occasions does director Polanski allow the street lights to shine on their faces. When Evelyn Mulwray appears she is also featured in black. The only character in white is Noah Cross. In these regards, the film’s mise-en-scene is playing with the noir notion of morality; the two protagonists are shrouded in black, and Cross, the antagonist, is featured in white. This leads the viewer to question the filmâ€℠¢s moral center and further destabilizes the viewer. This moral ambiguity is mirrored in the plot as Jack is handcuffed to the car even while attempting to reveal to the police that Cross is the murderer and villain. Ultimately, the

Fluoridation and Toxicity Issues Assignment Example | Topics and Well Written Essays - 1500 words

Fluoridation and Toxicity Issues - Assignment Example Nevertheless, there are three things I have learned from the lecture of Nokes. One of these is that the claims to the negative effects of fluoride on the human body – weakening of bones, Down syndrome, Cancer, birth defects, reproductive effects, renal and gastrointestinal effects, lower IQ, and other bone disorders – basically have no scientific bases (Nokes). Moreover, these claims may have only been due to traditional knowledge about the harmful effects of fluoride as a raw material and in large amounts. I have also learned from this that I should not believe advertisements or negative propaganda or any type right away. Furthermore, I believe that the best thing to do with something confusing is to deal with it in a logical way, specifically by using â€Å"What, Why, When, How, Where, Who† (Nokes). Through this logical investigation on fluoridation as explained by Nokes, one can find out that much of the claims that other people have against fluoride are actua lly unsubstantiated by scientific evidence and logic. The second thing I have learned is that the potential harm from fluoride is least likely to happen because although fluoride can be harmful in large amounts, the government has set a limit to this. This limit is actually a standard value at 0.01 g/mL while the actual amount of fluoride added by the city government to water is 0.001 g/mL. This is just a mere 10% of the actual threshold value, which means that it is impossible that the fluoride will ever cause any harm. However, I would still like to think that the harm that fluoride causes may not exactly depend solely on the amount. Sometimes, I would like to think that fluoride is like acid that no matter what the amount, it will cause some damage to the material. The third thing I have learned from Nokes’ lecture is that just a small amount of fluoride is added to the water and that even this amount relative to water is much smaller in concentration. For example, althoug h fluoride is 134,000 mg in 1 kilogram of the HFA compound, this seemingly large amount of fluoride actually only translates as 7.46 x 10-6 kg/L when mixed with water (Nokes). This means that water is a great neutralizer of chemicals as it is the universal solvent. The fluoride in water therefore, if water fluoridation is to be carried out soon, is definitely much lower than what can possibly cause any harm. However, as what I have explained earlier, sometimes some chemical reactions may kill someone regardless of the amount of the reactants involved. This means that a small amount of fluoride may actually still cause some harm which is just as intense as when it is caused by fluoride above safe levels. Moreover, sometimes I would like to think that some damage caused by fluoride may accumulate in the human body as more and more fluoride is being ingested through fluoridated water. Furthermore, there could also be some complications that will take some time before it can take effect as a disease. In fact, although I am convinced by Nokes’ lecture, he did not shed light on all the aspects of the fluoridation of water. I would therefore like to suggest that there should be a more thorough investigation of the case of the fluoridation of water in Hamilton City. All aspects should be answered especially those involved in the

Business Ethics Case Study Example | Topics and Well Written Essays - 1250 words - 4

Business Ethics - Case Study Example Arthur Andersons’ unethical and fraudulent dealings with companies such as Enron, WorldCom, Dynegy, and Sunbeam led to its indictment on 15th March 2002. Arthur Andersen reputation in auditing and accounting then was unmatched by any other company due to its unrivaled commitment of its founder. Arthur Andersen preferred to lose a client rather than change the audits to reflect false information. Boyd sarcastically quotes the words of Arthur, who once told a customer â€Å"There is not enough money in the Chicago to induce me to change that report† (583). The company lost that customer due to of Arthur Anderson’s moral stand. Arthur’s motto was â€Å"Think straight, Talk straight† (Boyd 583). When Andersen was the CEO of the Arthur Andersen, â€Å"Arthur Andersen was a place where integrity mattered more than fees† (583). Boyd in his review of the book, Final Accounting: Ambition, Greed and the Fall of Arthur Andersen, quotes words of Arthur in his 1932 speech: â€Å"If the confidence of the public is the integrity of accountants’ report is shaken, their value is gone. To preserve the integrity of his accounting reports, an accountant must insist upon absolute independence judgment and action....preserving his position of independence indicates certain standards of conduct.† (583). Arthur Anderson died in 1947, and he was succeeded by Leonard Spacey as the CEO. Fernando states that Spacey adopted the same culture of honesty, integrity, and ethical practices until Arthur Andersen was accorded the honors of being elected to the Accounting Hall of Fame of Ohio University in 1953. Despite its reputation that had taken years of commitment to build, Arthur Andersen found itself under a series of unending unethical scandals. These scandals involved companies such as Waste Management (1997), Sunbeam (1998), Baptist Foundation (1999), and Enron (2001). During the 1990s, while

Human Comfort And Thermal Comfort Engineering Essay

Human Comfort And Thermal Comfort Engineering Essay Abstract: The main purpose of the HVAC system is to achieve clean indoor air quality and human comfort (thermal comfort), there are many HVAC systems a designer or owner has the option to select based on the factors such as the type of the building, architecture, location, shape, surrounding climate, occupancy, envelop, level and frequency of activities, and the system operation schedule. In addition to the above base factors that an HVAC system is expected to be selected upon, the energy consumption, system efficiency, initial and operational cost, and finally, feasibility (short and long term rebound positive effect) are of the owners and designers critical concerns. This paper will discuss the elements of a typical feasible high performance low cost, fine tuned HVAC DDC integrated system to achieve the best for users, owners, and environment. 1. Introduction HVAC and its associated auxiliaries system are major energy consumers in a building, the rapid development of the advanced technology nowadays boosts the HVAC system feasibility as more complex control systems are developed for this industry and additional fine-tune, prompt response, standardized communication, ease of control and monitor, and remote accessibility. The BMS/DDC (Building Management System/ Direct Digital Control) integrated system is the core of a good feasible high-efficient HVAC system. The BMS is the most recent High-Tech energy management system that manage a building performance to the maximum desirable pre-determined set of parameters which able to control, monitor, adjust, save and record mostly all of the building facilities and utilities when integrated with all of the compatible buildings Sub-LANs, a DDC is one of those LANs and can communicate with other control LANs under the supervision of the BMS. BMS is able to supervise, control, adjust and record the illumination, electric power control, HVAC, security and observation, magnetic card and access, fire alarm, lifts, and other engineering systems. Integrated with the BMS, the DDC performs the HVAC control management and communicates with the other building controllers via the BMS to achieve integration based on a specified, programmed event sequence. I The DDC is the heart of an efficient HVAC system, it finely tunes the digital/analog input/output communication between sensors, probes, stand-alone controllers, LANs controllers, and finally the controlled element which could be an actuator that adjust the process variable (flow, temperature, level, or pressure), and allows for a feedback signal to further adjust the desired process set-point. This whole process is reported in a real-time manner to the BMS system for further coordination with the other buildings controllable systems to achieve integration based on the pre-programmed parameters. In order to achieve the highest human comfort, energy saving, and a long term rebound effect strategy, The BMS/DDC system should be interlocked and integrated with a high-efficient and feasible HVAC system, this combination can awards energy saving, system and environment sustainability, human comfort, and business feasibility. An Optimal Air System is a good example of a low-coast, high-performance, energy-efficient and a good investment for long-term rebound pay-back effect. Optimal Air System concept is based on the low temperature supply system that needs, less energy consumption by the most energy consumer auxiliary that is the fan, this affects the sizing of the ducts (less duck size), air handling units and fan motors, all of which will be smaller and results in a system that requires less space and uses less power. As this paper focuses on the HVAC/DDC integrated system application for human comfort, energy saving, and feasibility (long-term rebound effect), I will discuss and focus on the DDC and Optimal Air System integration for the above purposes and define characteristics, elements, and functions of both systems. II 2. DDC DDC has became the latest and the most recently used system for HVAC controls after the pneumatic and electromechanical control systems, digital pre-programmable controllers can handle extensive digital/analog data process from inputs (sensors, tranceducers and transmitters) that tyapically mesure temperature, flow, humidity, pressure or level, and outputs to final controlled devices to adjust a process variable based on a preset parameters, also recives a feedback signals from inputs again to further adjust signal command errors for best results based again on the setpoints. Digital inputs are Dry contacts from a control device, analog inputs are voltage and current signals that mesure variables such as humidity, pressure, level or flow form sensing devices and converted to percentage. Digital outputs are of 1 or 0 binary that either stops or starts equipments via a relay, analog outputs are voltage or current signals that control a process variable control devices such as valves, m otors or dampers. The DDC program code may be customized for intended use such as: Time schedule, sequence of operation, trend logs, alarms. 2.1 Elements of a DDC As described above, the three functional elements needed to perform the functions of a DDC system are: a) A measurement element (Sensor, prob, Transmitter, Transducer) b) An error detection element (Digital/Analog/pneumatic Controller, PCU) c) A final control element (Motor/Piston Actuator, VFD, VSD, Relay) 2.2 DDC controled mediums The DDC controls two variables: I. A controlled variable is the process variable that is maintained at a specified value or within a specified range. II. A manipulated variable is the process that is acted on by the control system to maintain the controlled variable at the specified value or within the specified range. 1 2.3 Functions of DDC system In any DDC, the four basic functions that occur are: a) Measurement b) Comparison c) Computation d) Correction 3. DDC LAN-WAN Configuration DDC is where mechanical and electrical systems and equipment are joined with microprocessors that communicate with each other and to a central computer BMS. This computer and controllers in the building Management system can be networked to the internet or serve as a stand alone system for the local peer-to-peer controller network only Fig 1. Additionally, the controllers themselves do not need a computer to operate efficiently as many of these controllers are designed to operate as stand-alone controllers and control the specific equipment they are assigned to control. Fig 1. Typical peer-to-peer controller network [1] 2 With a few exceptions, each DDC or building automation controller holds their own programs and has the ability to communicate to other DDC building automation controllers. It is important for the DDC or building automation controllers to communicate to each other. If the network fails for whatever reason then the system may still function (because the DDC controllers in a BMS system are stand-alone) but it will not function as efficiently as designed. The DDC/BMS system can be configured as independent (localized) closed-system, or DDC open-system based on accessibility options required by a group of buildings managed by a single company or property management firm (centralized), or a single property to be monitored and controlled by its own (localized) Fig 2. Fig 2. DDC/BMS LAN/WAN configuration [2] 3 3.1 BACnet compatibility BACnet is the term commonly used to refer to the ANSI/ASHRAE Standard 135- 1995, adopted and supported by the American National Standards Institute (ANSI) and the American Society of Heating Refrigeration and Air-Conditioning Engineers (ASHRAE). BACnet stands for Building Automation and Control network. BACnet is a true, non-proprietary open protocol communication standard conceived by a consortium of building management, system users and manufacturers [3]. A closed protocol is a proprietary protocol used by a specific equipment manufacturer. An open protocol system uses a protocol available to anyone, but not published by a standards organization. A standard protocol system uses a protocol available to anyone. It is created by a standards organization. Open Systems: An open system is defined as a system that allows components from different manufacturers to co-exist on the same network. These components would not need a gateway to communicate with one another and would not require a manufacturer specific workstation to visualize data. This would allow more than one vendors product to meet a specific application requirement. The DDC/BMS BACnet based LANs and Sub-LANs can be accessed, controlled and monitored from remote locations via the Internet trough a centralized data management system which is capable of collecting data from multiple sites. This is accomplished by connecting with a gateway for collecting data from the lighting and air-conditioning control systems installed in each building or factory, and the center server for providing data collection, database and web server functions along with security measures applied to all transmitted data. Based on the capability of real-time monitoring and analysis of actual energy consumption such as electricity and gas from a remote location by using a web browser, this system is able to achieve the maximum level of energy saving in buildings and factories which in turn, reduce the emissions and the environmental impacts by taking advantage of its cost effectiveness and by limiting the required energy for a specific application or function. 4 Fig 3, Integrated BACnet based WEB Browser BMS Control System Layout [4] 5 4. DDC/BMS integrated features, application and functions 4.1 Energy saving DDC/BMS allows the owner to set up schedules of operation for the equipment and lighting systems so that energy savings can be realized when the building or spaces in the building are unoccupied. Have algorithms as reset schedules for heating plants, static pressure control, and other systems where energy savings can be realized through these predictive programs. 4.2 Human comfort (thermal Comfort) DDC/BMS system allows the equipment optimal start with pre-scheduled program. Optimal start is allowing the equipment to be brought on in an ordered and sequential manner automatically on a schedule before the building is reoccupied so that space set points can be realized before occupation. Event sequence programming features allow the system to compare space temperature, outside air conditions, and equipment capabilities so that the equipment can be turned on at an appropriate time to ensure space set points are achieved before occupation. Have trim and respond capabilities. Based on zone demand the set point for various heating and cooling sources will change according to demand from the zones. For instance, in a Variable Air Volume system, all the VAV boxes are served from a central air handling unit. If all the zones are at set point then the supply air temperature set point of the air handler is automatically changed to prevent mechanical cooling from occurring when it is unnecessary. When the zones grow warmer the supply air temperature set point is automatically lowered to allow mechanical cooling to satisfy demand. In conjunction with the appropriate mechanical system set-up, offer economizing based on enthalpy calculations and/or CO2 set point control. 4.3 Long-term rebound effects Offer load shedding when power companies are at peak demand and need business and industry to cut-back on power usage to prevent black outs. Building Management systems for instance, allow the owner to cycle various things off like water heaters or drinking fountains where use of these things- 6 -will not be noticed even though they are off. Management companies who acquire a good DDC/BMS can set up the system to bill tenants for energy usage (fewer employees required). 4.4 Proactive Ability to send alarms via email, pager, or telephone to alert building managers and/or technicians of the developing problems, and system failures. 4.5 Other applications and compatibilities Have the ability to monitor energy usage including the ability to meter electric, gas, water, steam, hot water, chilled water, and fuel oil services. Have the communications abilities to be integrated with other buildings via WAN setup using the standardized TCP/IP family of protocols. It is BACnet base web browser compatible and other open source communication protocol which allows the system to be accessed via the web browser from remote locations. (Refer to 4.2) 5. High-performance Low-energy HVAC design Recall the Introduction, In addition to BMS/DDC System application for energy saving and high HVAC system performance, a green HVAC system design will achieve all aspects of comfort, energy saving, low initial and operational capital costs, and adds more efficient performance in conjunction with the DDC system, an example of such green HVAC system would be an Optimal Air System [5]. Optimal Air System concept, idea and example are taken from McQuay Air Conditionning/2002 McQuay International/Application Guide AG 31-005 as an example to illustrate its benefits for energy saving, human comfort, lower initial cost and long term rebound effects. Optimal Air systems uses less energy than conventional systems on an annual basis, for example, In a conventional system, supply air temperatures run between 54Â °F -57Â °F from the air handling unit. With duct heat gain, the supply air ranges from approximately 56Â °F-59Â °F out of the air diffuser. 7 In Optimal Air System, supply air temperature run between 45-52Â °F from the air handling unit to optimize energy consumption, reduce first capital cost and improve humidity control. Optimal Air has for years been extensively used in grocery stores and is gaining increasing popularity in comfort cooling applications such as offices and schools. 5.1 Advantages There are several benefits of Optimal Air that make it an attractive system for use in a wide variety of applications. It Saves Space and Reduces Energy and Construction Costs, increases the amount of sensible heat that each CFM delivered to a zone can absorb. While 50Â °F air may not seem much colder than 55Â °F air, the delta T rises from 20Â °F to 25Â °F. That is an increase of 25%. This affects the sizing of the ducts, air handling units and fan motors, all of which will be smaller and results in a system that requires less space and uses less power. In many applications, fans can use more power annually than refrigeration (chillers, condensing units, pumps, and compressors). An example of annual 10-story building energy usage of 200,000 square-feet of HVAC components, the fan energy use is high because the fans operate every hour the building is occupied providing minimum air movement, ventilation air, heating, etc. In this case, an Optimal Air system would have a very real impact on overall energy costs. Fig 4, Annual HVAC Energy Usage [6] 8 5.2 Less Humidity, more comfort Optimal Air systems take more moisture out of the return and ventilation air mixture as it passes over the cooling coil. The lower moisture content in the supply air reduces the Psychrometric balance point humidity level in the conditioned space. This allows the space temperature to be set higher while achieving the same comfort level for occupants and further reduces the supply air quantity and fan power requirement. 5.3 Quieter and Improve Indoor Air Quality (IAQ) The lower air volume required for Optimal Air systems makes them quieter than conventional systems. Fan sound generation is a function of fan type, static pressure and air volume. By reducing air volume (and often the total fan static pressure) Optimal Air systems generate lower fan sound which can result in more desirable space conditions. This reduced sound generation can also be used to reduce the cost of any required noise attenuation in critical applications. The lower required air volume can also be used to reduce filter face velocities, allowing more efficient filters to be used without high energy cost penalties. The lower air temperature and resultant humidity levels also reduce the chance of mold growth in the air handling units, ducts or the occupied space. The example of the building above requires a supply air of 26,667 CFM. The HVAC system is floor by floor VAV air handling units with a two chiller primary secondary system, Optimal air works equally well with applied rooftop units or indoor vertical self-contained units. Table 1, HVAC system performance with optimal air system [7] 9 Table 1 shows the HVAC system performance as the supply air temperature, to the duct, is lowered. It is important to differentiate between supply air temperature off the cooling coil and supply air temperature into the duct. To accommodate the lower supply air temperature, the chilled water supply temperature (CWST) was gradually lowered, the air handling unit coils deepened to allow for closer approaches, and chiller performance was adjusted to deal will the increased lift. Because of their basic operating differences, DX rooftop and self-contained systems may have a different Optimal Air temperature than a chilled water system. When considering multiple system options, it is important to use Energy Analyzer for each in order to identify the best option. 5.4 Optimal Air Balance Point Reduced fan energy must be traded off against increased refrigeration energy. This trade off varies with the type of building, the type temperature control system, the type air conditioning system and geographic locale. Therefore, the optimal supply air temperature is different for every job. When only energy costs are a factor and no thermal storage is involved, this optimal supply air temperature generally falls in the 47Â °F -52Â °F range. It can be determined by comparing total system energy consumption with varying supply air temperatures using an energy analysis program. 5.5 Space Design Temperature and Related Comfort Temperature, humidity, air velocity and mean radiant temperature directly influence occupant comfort. Conventional designs are usually based on maintaining 75Â °F and 50% RH (Relative Humidity) in the occupied space. Figure 5 shows the ASHRAE comfort zone where 80% of the people engaged in light office work are satisfied. As the relative humidity is lowered, the space air temperature can be raised and still provide occupant comfort. The leaving air condition from the air handling unit is the primarily control of the relative humidity in the occupied space. The internal moisture gains from people, kitchens, etc, as well as infiltration also play a part. 10 Fig 5, Equivalent comfort chart [8] In most climates, the lower the supply air temperature, the lower the humidity ratio and the drier the space. Figure 5 shows sensible heat ratio lines for conventional, Optimal and low supply air temperatures. As the space relative humidity is lowered, the space temperature set-point rises from 74Â °F to 78Â °F. 5.6 ASHRAE Compliance The 1999 and 2001 version of ASHRAE Standard 90.1, Energy Standard for Buildings except Low Rise Residential Buildings [9], has mandatory requirements for refrigeration equipment and prescriptive requirements for fan work. The Standard recognizes that Optimal Air systems improve fan work significantly and provides credits to account for improved fan performance. In addition, refrigeration system performance is rated at conventional conditions or special tables are provided to account for non-standard operating conditions (as is the case with centrifugal chillers). In either case, ASHRAE Standard 90.1 does not penalize Optimal Air systems. 11 5.7 Design Considerations Design of refrigeration and air handling equipment for an Optimal Air system is similar to the design of a conventional air temperature system. Attention must be paid, however, to air distribution, controls and duct design. Conventional diffusers, when properly applied, will work with Optimal Air. Controls also require only minor changes from conventional systems. In particular, programming of economizer controls and supply air temperature reset. Finally, the ducting system must be sized for the reduced air volume to take full advantage of the potential capital savings. Duct insulation and sweating should also be reviewed to provide a trouble free system. Not every building type is a good candidate for Optimal Air. When air volumes are dictated by air turnover rates, such as some health care applications, Optimal Air offers no advantage. In fact, there would be increased reheat costs. Office buildings are a strong candidate for Optimal Air. They have high sensible heat ratios and typically less than 20% ventilation loads. Schools can also be a possibility. Generally speaking, as the percentage ventilation load increases, Optimal Air becomes less attractive. Location and climate also impact whether or not Optimal Air is a good candidate. Locations where weather provides significant economizer hours between 45 and 55Â °F will limit the savings. Ultimately, each project must be checked by performing the applicable specific calculations. The following should be considered: Load and Balance Point calculations, Space Temperature Set-point evaluation, Design Load Calculation, Primary and Secondary System Selection, Parallel, mixing or series VAV-Fan powered boxes, Perimeter Heating, Air Distribution, Diffusers (based on air flow and the throw distance calculation), Duct design (considering duct heat gain, sweating and insulation). 5.8 System Life-Cycle Analysis Evaluating different engineering solutions is always part of a good proposal. Optimal Air systems are no different. 12 In the case of Optimal Air, there may be no need to do any calculations because Optimal Air systems cost less to build (lower capital cost) and have the same operating cost as conventional systems (assuming the balance point was used for the design). Duct sizing will decrease almost linearly with reduction in air volume. The installed cost will not change linearly because of the labor portion. A 20% reduction in air volume can result in 80% savings of the 20% reduction or 16% overall savings in sheet metal cost. On the plus side, there are less pounds of steel and fewer man-hours to install it. On the minus side there is more insulation. Terminal boxes and diffusers will be a wash since there are fewer of them but the equipment cost will be higher than conventional equipment. HVAC equipment will cost about the same. This is conservative because the air handling equipment will cost less and refrigeration equipment will be slightly more. There is typically more capital invested in air handling than refrigeration. Building envelope should be the same for new construction. In the case of retrofit applications, it will depend on the quality of the existing building. The cost of space may also need to be evaluated. Not accounting for space savings is conservative. There will be space savings but they may be difficult to realize. If enough plenum height savings can be realized to add another floor within the same building envelope, then that rentable space should be accounted for. Simple payback calculations do not take into account the cost of money, taxes and depreciation, inflation, maintenance or increases in the cost of energy. A more complete analysis should include Internal Rate of Return (IRR) and net present value (NPV). In the HVAC industry, many projects fail simple back (they are in the 5-year range) while passing IRR (they offer a 25% rate of return). Software analysis tools can be used to perform both energy and life-cycle analysis that include simple payback, IRR and NPV. 13 6. Conclusion Building owners and designers faced with increased concerns for energy saving and environmental stewardship search for cost effective system options for their projects. The DDC, integrated with a high-performance low-energy HVAC system as the Optimal Air system can deliver both low first costs and reduced energy costs in a new construction and retrofit applications. This integrated system will not only meet the efficiency and sustainability of its performance at the desired set-parameters, but when designed with advanced selection tools, installed with the most advanced DDC/BMS system, and supported by trained operators, will achieve both energy saving and long term rebound effect (pay-back), maximum human thermal comfort, in addition, it allows building owners to compare predicted energy use to actual performance, this leads to a flexible budgeting, further future system adjustment and energy consumption cut-back. The whole integrated DDC/BMS HVAC system function will also contribute in the environmental impacts reduction. In todays challenging energy efficiency, building owners need proven system that delivers the necessary performance to meet their integrated environmental sustainability and business goals [10].