Duhem and the Good Sense of the Physicist Essay Example for Free

Duhem and the Good Sense of the Physicist Essay This paper will examine Duhem’s good sense of a physicist. We will also succinctly discuss his reason behind this claim. To explain Duhem’s good sense of a physicist, different experiments involving systematic procedures will be inspected, and J. J. Thomson’s experiment on cathode ray tube is one of these experiments. Two hypotheses about electricity that received worldwide acknowledgement will also be discussed. The explanation of these hypotheses will further question Duhem’s claim on the good sense of a physicist. Jean Perrin’s contradictory presentation about the effectiveness of experiments in testing hypotheses contributes to the goal of this paper. The Good Sense The good sense of Physicist examined by Pierre Maurice Marie Duhem (1861-1916) can be used to determine very confusing and contradicting experimental results. He encouraged the use of this ‘good sense’ since there are discoveries that doesn’t require extensive experiments and the ‘good sense’ of the physicist will be the guide to solve a problem. Duhem argued that this is enough to accept a good and well-explained hypothesis. He also encouraged the revision of a claim to accommodate and balance a confusing experiment. However, this method is too ambiguous and irrational especially for those tests that needed extensive experimental guidance. The use of the good sense is too risky for future purposes. One good move that we can consider to refute Duhem’s claim about the good sense of a physicist is to examine the approach used by different scientists. Sir Joseph John Thomson’s (1856-1940) experiment on the cathode rays and the cathode ray tube prompted an innovative period in the field of electricity. This experiment led to the discovery of electrons and other subatomic particles, a breakthrough that enhanced the understanding of the composition and behavior of matters. Three different experiments were performed using these cathode ray tubes. Thomson first used magnetism to see if there is a chance that the negative charge will be separated from the cathode rays (Park). Further elaboration of this experiment led him to the conclusion that the negative charge and the cathode rays are inseparable. In his second experiment, his main objective was to know if the presence of an electric field would influence the projection and behavior of rays. He constructed a nearly perfect cathode ray vacuum because he believed that previous experiments failed because of the presence of different gaseous element in the air. With his subsequent procedures, he was able to prove that the electric field could really influence the movement of rays because these rays were deflected, signifying the track of the negative charge. Thomson’s third experiment involves the measurement of the charge-to-mass ratio of the cathode rays. He measured the amount of cathode rays that were averted due to the presence of a magnetic field. He also measured the amount of energy they have. His observation led him to conclude that either the particles were very light or greatly charged because the charge to mass ratio was more than a thousand times greater compared to a hydrogen ion. Thomson’s hypotheses were proven not just because of merely theorizing. He proved it because he followed a systematic procedure. His path was guided by previously known facts. He was also guided by the failures of earlier experiments. In 1913, there were two hypotheses that had gained universal acceptance. The first one states that electricity occurs in discrete fundamental units. The second hypothesis states that the magnitude of the negative charge is three times smaller than the smallest mass associated with the fundamental unit of positive charge. The development of these hypotheses was brought about by the continuous growth of awareness in electricity. The discovery of the Avogadro’s number, mle and e of the constituents of various electrical discharges, mle and e of gaseous ions, and the total charge of a mole of monovalent ions Ne gave rise to this outcome. Duhem should give importance to the experiment conducted that supports these hypotheses. According to Jean Perrin, hypothesis, in most cases, is both essential and productive (Soshichi). He explained it in terms of examining a machine. He said that we do not just study a machine by just considering the visible and tangible parts. We will go as far as our eyes can tell us if we only consider this. Aside from these visible parts, we also seek the properties of the hidden gears that can explain its evident motions. To explain this, we must relate the visible parts to the invisible parts. If it is outside our scope of understanding, we seek retribution by studying its components part. There we formulate our hypothesis. Because we have the intuitive intelligence needed in solving such complex problem, Perrin added, we were able to give rise to the doctrine of Atoms. Perrin’s method is mainly based on experimental foundations. We can divide Perrin’s experimental inquisition into two. The first division is consisting of checking whether the result of an experiment follows a given algebraic distribution. The second step involves using approximation of the coefficient of diffusion, which is vital for gaining the Avogadro number. According to Duhem, a physicist can never test an isolated hypothesis. A physicist can never leave the theory outside the door of the laboratory since a failed prediction or experimental test cannot tell a scientist where the error lies. It can only tell him to examine further the experiment and try not to commit the same mistake. In our modern times, a hypothesis is not valid unless it is tested. In this paper, we have succinctly discussed his reason behind this claim. To explain Duhem’s good sense of a physicist, different experiments involving systematic procedures was inspected, and J. J. Thomson’s experiment on cathode ray tube is one of these experiments. Two hypotheses about electricity that received worldwide acknowledgement were discussed. Jean Perrin’s contradictory presentation about the effectiveness of experiments in testing hypotheses contributes to the goal of this paper. The good sense amounted in this case is the rational way a physicists approach a problem. They used experiments to support their claim, not just downright theory. The good sense of a physicist accounts for his sense of creativity, how he develops his own way of obtaining an answer to a hypothesis. All of this is through experiments. Works Cited â€Å"Pierre Marie Maurice Duhem. † March, 2001. JOCEFR. 12 May, 2008 http://www-groups. dcs. st-and. ac. uk/~history/Biographies/Duhem. html. Park, John L. 1996. â€Å"J. J. Thomson’s Cathode Ray Tube†. 12 May, 2008 http://dbhs. wvusd. k12. ca. us/webdocs/AtomicStructure/Disc-of-Electron-Images. html. Ariew, Roger. 13 July, 2007. â€Å"Pierre Duhem†. 12 May, 2008. http://plato. stanford. edu/entries/duhem/. Soshichi, Uchii. 9 February, 2001. â€Å"Jean Perrin’s Book on Atoms†. 12 May, 2008. http://www. bun. kyoto-u. ac. jp/~suchii/perrin. html.

Characteristics of a Metropolitan

Characteristics of a Metropolitan ABSTRACT The purpose of this paper is to understand what Groningen appropriates as a mini-metropolis city. The first step is to find the meaning of the metropolis from a variety of sources, the second step of searching for data about Groningen and the third step is to compare between the two data. In the end is at a conclusion that the metropolis are not only associated with the factor number of population, area and economy of a city, but a related metropolis of a character which is owned by the city. So Groningen with all matters and functions and its ability to further develop its compliance is said to be a mini-metropolis city. Metropolis Characteristics Metropolitan is a term used to describe a relatively large urban area, both of the size of area, population, and the scale of economic and social activity. While the etymology, said metropolitan (noun) or metropolis (adjective) is derived from the Ancient Greek language, which the word meter means mother, and the word polis means city. (Wackerman, 2000) In general, the metropolitan can also be defined as a large residential center that consists of a large city and some in the surrounding area with one or more major cities that serve as a point of contact (hub) to the towns in the surrounding areas. A metropolitan area is an agglomeration of several settlements, settlements should not be the city, but the overall form a unity in nature activities and lead to the city center (a large city that is the core) that can be seen from the flow of labor and commercial activities. According Goheen (in Bourne, ed. 1971), City / Metropolitan District is an urban area with a population characteristic that stand out in comparison with the surrounding countryside. This term is used to give a more precise picture of the amount and concentration of the population in a large area, which in turn can show the magnitude of the centers of the main settlements in the country. In general, the metropolitan region can be defined as large, with economic and social unity integrated and characterize the activity of the city. The characteristics of the Metropolitan of several aspects such as the amount of population, economic activities, mobility, activities of the population, and the structure of the region. 1. The amount of the total population The magnitude of population becomes a major consideration in determining the aspects of the definition of a metropolitan. However, some urban experts set different limits for the determination of the minimum number of metropolitan area population. 2. Economic activity In the metropolitan area occurs agglomeration residential areas and jobs. That is, the metropolitan area is an urban area with a specializing in social and economic activities function. The economic specialization is the industrial and services sectors. Industrial activities and services is the dominant sector in the growing metropolitan region. Economic activities that take place in the metropolitan area is heterogeneous and has a role as a central / center of economic activities on a regional scale, both within the province or state and national scope. Growth and development of the urban economy are the driving factors behind the metropolitan and will continue to affect the prospects of the future metropolis. In fact, metropolitan anywhere carry out the functions of the national economy, which is a very significant contribution to the whole country. Metropolitan supposedly able to play a role and function in accordance with its share in national economic development. On the other hand, the role of the national economy must be balanced with the metropolitan economy comparable level and is able to also write a decent life for the citizens of the metropolitan community itself. Metropolitan should be able to create jobs and income level sufficient for people to be able to survive and even enjoy life in the metropolitan environment. The income levels are generally far exceeds the metropolitan cities and other areas as well as rural, and the main attraction for the current metropolitan population who are looking for work and a decent lif e. Surely there must be taken into account that the level of public spending in general metropolitan also much higher than the city and other areas. 3. Mobility of peoples activities One characteristic of the metropolitan area is shown in the form of ease of mobility by Angotti (1993) seen in 3 forms (Winarso et al, 2006), namely: a. Occupational mobility (mobility Employment), characterized by the ease with which people move workplace without having to move residence because of the many types and variations of jobs available. b. Housing Mobility (Residential Mobility), occurs in line with the mobility of the workplace. c. Mobility trip (Trip Mobility), occurs because of the mobility of the workplace and residence. 4. Structure Regions Broadly speaking there are two kinds of physical form metropolis that shapes the metropolis spread (dispersed) and the shape of the metropolis centered (concentrated). To spread the metropolis consists of the metropolis spreads and galactic metropolis. As for the centralized metropolis comprises centered metropolis, metropolitan and metropolitan ring star (jayadinata, 1986: 221-226). The Mini Metropolis There is a definition of a mini metropolis of Dr. Peter Kurz, where he was a major in Mannheim, Mannheim as the city he called mini-metropolis. Not because of its large size, not too big for its population, but because of Mannheim managed properly so that this city we can eat, live and work. Geographically, the city is located between two rivers, providing public transport links and good shopping center, and a center of culture, science, research and creativity. In other words, Dr. Peter Kurz said that in this town people can feel the balance of life and comfort of staying in Mannheim Groningen Characteristics Groningen is the main municipality as well as the capital city of the province in the Netherlands. Groningen is the largest city in northern Netherlands, so Groningen is the regional power of the northern Netherlands. When viewing a map of the Netherlands, it appears that groningen is downtown for northern Dutch region, and there are no other major city within a radius of about 150 kilometers from Groningen. Apart from being the capital of the province of Groningen is also a historical and geographical center of Groningen is also a center of trade since the end of the 15th century. The existence of the center of the city of Groningen Martini tower is a symbol of power and later with the establishment of the University of Groningen in 1614 with the development of the city of Groningen now has about 50,000 students (25% deari total population), it is seen that the Groningen become an important educational center for the Netherlands. In addition to being the city with a ratio of the number of students that a lot of the population, the city of Groningen also a leading city in terms of innovation, research development, and entrepreneurship Figure 1. Netherland Map (Steen, 2015) Population in Groningen Groningen as a province has a population of 579.036 residents, and as a Municipality of Groningen has a population of 189.991 residents, which means the city of Groningen has 33% of the total population in the province of Groningen (Steen, 2015). Table 1. composition of the population of the cities in netherland (Steen, 2015) 2000 2009 Amsterdam 731,288 (44,4%) 755,605 (49.5%) Rotterdam 592,673 (40,0%) 587,134 (46,9%) The Hague 441,094 (40,1%) 481,864 (47,3%) Utrecht 233,667 (29,8%) 299,891 (31,5%) Groningen 173,139 (16,5%) 184,227 (19,7%) Netherlands 15,863,950 (17.5%) 16.485.787 (19.9%) Note ( % ) = % of ‘allochtoon’ = 1 or more parents born abroad From the population compotition table, we can see that Groningen become the 5th largest city in population in cities in Netherland, although there is a significant difference in the population of western part of the Netherland city Economic activity According to data from the World Bank and the International Monetary Fund, the Netherlands is the 18th largest economy in the world in 2012. GDP per capita Approximately $ 43.404 makes netherland one of the richest countries in the world. Netherlands has a large natural gas reserves northern sea areas, but most of the production is from onshore wells and natural gas produced from the Groningen province, Consumption of natural gas in the Netherlands is only about 2/3 of its production, while the rest is exported. Netherlands is currently the fifth largest exporter of natural gas in the world. Figure 2. Largest Gas Fields In The World (http://www.energy-pedia.com/news/netherlands/exxonmobil-to-continue-to-tap-the- enormous-resources-at-the-slochteren-field-for-another-50-more-years) Employment Data Based on data up to April 2012, Groningen providing 135 537 jobs during the two years in which the growth 3010 = 2.3%. And Groningen has 15 909 firms, with over 2 years experience growth in 1417 = 9.8%. This shows that Groningen has good economic growth in terms of the number of jobs available. According to data from 2009 recorded that the ratio of the number of people who work for 1000 residents, Groningen ranks 3rd in the Netherlands the number of 730 jobs per 1,000 residents. This means th culture/recreationat is above the national average of 490 jobs per 1,000 Netherland resident Tabel 2. Employment Growth per-Sector 2009 – 2011 (Steen, 2015) Employment Growth 2009- 2011 agriculture 0.10% industry 5.20% utilities 2.30% ++ construction 4.30% trade 12.30% restaurants, hotels 4.20% transport, communication 8.00% finance 1.50% business services 18.40% + government 8.80% education 9.90% + health 20.70% culture/recreation 4.50% + Mobility of peoples activities The city of Groningen has been recognized as a Word Cycling City, this is because 57% of trips in the city is done by using a bicycle vehicle. Transport infrastructure in the city has been designed well so convenient for cyclists. In 2000, Groningen was elected as Fiedsstad 2002 The Top Bike City of The Netherlands for 2002. The transport system in the city center provides priorities for bicycles and pedestrians, by making traffic cirlulation prohibiting private vehicles into the inner city, inner city divided by 4 zones A, B, C, D. So that private vehicles can not be moved from zone A to B through the middle of town but directed at the ring road towards the road first. so although the distance A to B near as be felt far as having to turn first. Rail: Groningen has three train stations, namely station Groningen, There are three stations in Groningen, Groningen Europapark and Groningen Noord. The main train station has regular services to almost all major cities in the Netherlands (served by the Nederlandse Spoorwegen and Arriva) as well as other European cities. Bus: Groningen has inter-city bus transportation and inter-state bus which flies to several cities in the Netherlands and Germany. It also has a special bus transportation routes within the city groningen that connects several areas in the city groningen CONCLUSION There are diverse opinions of experts on the definition and characteristics of a metropolis, where many describe as a city with a high population and high-income economy, with pomp owned a city. Groningen, with a population of only about 200,000 residents but has a soul and spirit as a mini-metropolis city, Why a mini metropolis, not as a metropolis? I think this is just a comparison of size alone. Groningen has a very compact design and the city continues to grow but never leave its cohesiveness. As a cultural center, education center and a regional economic center in the northern Netherlands, with all its facilities and functions, Groningen has played a role as an attractive city, good for work, interesting place to visit, and certainly comfortable place to live. If I may suggest, I would say that the Groningen like a towering lighthouse and shining brightly, illuminating the surrounding areas. References http://www.energy-pedia.com/news/netherlands/exxonmobil-to-continue-to-tap-the-enormous-resources-at-the-slochteren-field-for-another-50-more-years http://en.wikipedia.org/wiki/Economy_of_the_Netherlands http://www.cbs.nl http://en.wikipedia.org/wiki/Groningen http://gemeente.groningen.nl/ https://www.scribd.com/doc/50565637/The-city-of-Groningen-has-been-described-as-a-mini-metropolis-Is-this-justifiable http://www.cityoftalent.nl/ http://www.ob-peter-kurz.de/data/minimetropolis.pdf

Disposal Issues And Solutions Of Electronic Waste Environmental Sciences Essay

Disposal Issues And Solutions Of Electronic Waste Environmental Sciences Essay Electronic waste E-waste is the result of obsolete electronic devices such as computers and mobile phones. E-waste isneeds to be distinct from other forms of industrial waste chemically and physically; it contains both valuable and hazardous materials and causes harm to environment and human health whenwithout the use of special handling and recycling method are not used (Robinson 2009, p.184). Rapid changes in technology, poor coordination between new software and existing hardware, and the expenseiveness offor reusinge or recycling result in a large amount of e-waste annually. These electrical obsoletes are either landfilled, or exported from rich countries to poor countries (Robinson 2009, p.184). Since at least 2002, cases of unmanaged disassembly and recycling e-waste in developing countries have been reported (Gibson 2006, p.323).This will lead to not only detrimental effect on workers in e-waste receiver countries but environmental contamination, and may adversely impact human health risk. Thus, issues stemming from e-waste are considered as a global transactional issue amongst producers, consumers in rich countries and e-waste receiver countries in poor countries., These which may require international policies or supports by governments and organisations. Design for the environment in products (Amos, Deathe, MacDonald Amos 2008, p.322), e-waste take-back (Xu 2008, pp.1-3) or other municipal and organisational policies have addressed the issues as environmentally friendly approaches. This will enable consumers to reduce, reuse and recycle more greater and perhaps will perhaps lead to more environmentally friendly operating procedures. The purpose of this report is to describe issues of e-waste, analysis of the problems, some approaches for producers and e-waste receivers in order to deal with the issues along with organisations and government policies. 2. Growth of e-waste asand a global transactional issue 2.1. The growth of e-waste Technological advents in the electronics industry and the short life-cycle ofin products have been generating enormous amount of electronic wastes (e-waste). Consumers accept the benefit of technological innovations and a. A gGrowing volume of waste electronic equipments are generated as consumers continue to upgrade and replace obsolete, broken devices everyin a few years. The total global e-waste production iswas estimated to be 20-25 million tonnes per year, with most e-waste being produced in Europe, the United States and Australia (Robinson 2009, p.183). According to the U.S. General Accounting Office, over 100 million computers, monitors, and televisions are becoming obsolete each year. Most estimate say that 20 million computers and televisions become obsolete annually, and less than 6 % are being recycled (Gibson 2006, p.322). As a result, the total global production of e-waste has continued to increase considerably, and most e-waste is currently landfilled or exported to dev eloping countries for recycling. Rapid technological evolution in electronic products and competitive electronic marketplaces means more consumers in rich countries are generating large amount of waste equipments, much of which is still operational. Robinson (2009, p.185) states that the total number of computers and other potential possible e-waste devices is potently correlated with the country ¿Ã‚ ½fs GDP, and consequently, he predicts Eastern Europe, Latin America and China will become major e-waste producers in the next 10 years. The concern over e-waste is not only the amount produced but also the toxic footprint involved in the course of the disposal disassembly and destruction of the equipments. Unlike other waste electrical and electronic equipment (WEEE) such as washing machines and refrigerators, e-waste contains potential environmental contaminants (Robinson 2009, p.185). Clearly, it is necessary to take effective actions to address the exponential e-waste production and the concentration of environmental contaminants associated with e-waste, taking into account recycle and reuse. 2.2. E-waste producers and consumers ¿Ã‚ ½f dilemma The shorter lifespan ofin electronic products means that consumers continue to purchase or replace a product within a few years, and the design of a product is often incompatible between new software and existing hardware. A replacement frequency of computers or cell phones is 2-3 year in 2005, which was dropped from 4-6 years in 1997 (Cairns 2005, p.238; Robinson 2009, p.185). Cairns (2005, p.237) argues that current product design features and changes in technology and wireless services often cause users to necessitate frequent replacements of operational electronics equipment. Many software or hardware companies usually set an end-of-support policy in their products so that it will encourage their potential customers to migrate old version of their products to new ones, which makes it difficult for customer to keep old ones. Therefore, consumers are pressured into replacing their products regardless of their inclinations. According to Huang (2009, pp.115-116), the development process of information systems which have been used for decades, is divided into five stages; planning or investigation, analysis, design, implementation, and maintenance. Many of the current electronics have a lack of the concept of sustainability in each stage. For example, the battery of some MP3 players or mobile phones requires intricate disassembly. It is often cheaper to consider the purchase of a new one instead of sending it to a customer support for the replacement. This will in turn lead to create the customers ¿Ã‚ ½f dilemma to use out-dated electronic items. It is essential for producers to listen to customers ¿Ã‚ ½f voices and design their products to meetting the demands including a sustainable life-cycle. This will enable customers with enough information, less costly for reuse and recycle, and technical support to encourage and facilitate product upgrades and repairs. ? 3. Impacts of e-waste 3.1. E-waste receiver countries Most electronic equipment that fulfils its lifespan by product strategies or faults is discarded without being recycled or reused. However, substantial quantity of the obsolete electronics is exported to developing countries, especially to China, after India, Pakistan, Vietnam, the Philippines, Malaysia, Nigeria and Ghana for recycling or disposal (Puckett el al. 2005, cited in Robinson 2009, p.187; Cairns 2005, p.241). It is reported that some 70% of all exported e-waste is delivered to China (Liu et al. 2006, cited in Robinson 2009, p187). Although some exported electronic devices might be used for some time, most of them will be disassembled and landfilled due to inability to cope with the increasing e-waste globally. In e-waste receiver countries, operations for the disassembly may be primitive and landfills may be poorly managed. The process of mechanical separation of component contains smelter, reclamation and burn, and can be automated or carried out by hand burn (Cairns 2005, p.241; Robinson 2009, p.187). Since an electronic device consists of many components and most products are hardly considered the disassembly process in their designs, the workers in the receiver countries may work in their own way without enough information for the dismantlement processes. These processes may contain an environmental hazardous. 3.2. Environmental issue Many e-waste contaminants may be involved in the process of the dismantlement without the use of special handling or tools. Most developing nations have more relaxed environmental regulations, especially in China, India, and Pakistan (Ruth 2009, p.75). The loose regulations for the e-waste dismantlement can lead to insurmountable environmental problems within the e-waste receiver countries. For example, villagers and workers who engage in the de-assembling process use environmentally unfriendly techniques including the open-air burning and wastewater discharge at the factories (Robinson 2009, p.188). A result of the dumping, burning hazardous chemicals and the wastewater disposal of e-waste will cause a variety of environmental problems such as water, air and soil contaminations. E-waste that contains some base materials or valuable components may be environmentally important, while these devices may contain high concentrations of flame retardants and heavy metals (Cairns 2005, p.241). The e-waste contaminants bring an adverse effect on an aquatic ecosystem. Many studies discover the fact that higher rate of hazardous elements in the livers or creatures such as waterfowl is found in the downstream areas from e-waste recycling factories and towns (Robinson 2009, p.188). Combustion of e-waste by melting plastic or burning invaluable metals has resulted in concentrations of toxic percentage in aerial samples from areas near the e-waste recycling workshops (Robinson 2009, p.188). Soils are also contaminated in e-waste sites where acid leaching was used to recover valuable metals (Gibson 2006, p.323; Robinson 2009, p.188). Uncontrolled burning, disassembly and disposal processes of e-waste in the receiver countries can have a horrific deterioration on ecosystem such as groundwater contamination, air pollution, or even water pollution not only within the e-waste disassembly areas but other areas and neighbouring countries. 3.3. Human health A lack of adequate facilities for recycling with primitive techniques may involve significant risk to the workers as well. The workers in most villages currently use unsafe primitive techniques without goggles, masks or gloves, which have adverse effects on the workers (Robinson 2009, p.188). The primary route of exposure to a toxic chemical is spread into the air via dust, and contaminated dust is found in human breast milk (Dealthe, MacDonald Amos 2008, p.321). Consequently, it is difficult to minimise the expanding damage caused by e-waste. The flux of electronic products that generates in rich countries and exported to poor countries may contain many serious transactional issues in some cases. Foods or products imported from the e-waste receiver countries, where are environmentally deteriorated may also threaten human health. For instance, children ¿Ã‚ ½fs toys, imported from China, are reported to have elevated rates of toxic elements (Chen et al. 2009, cited in Robinson 2009, p.189). The content of detrimental substance is collected in the ground and surface-waters, agricultural soils, rice, egg, fish and eventually humans (Robinson 2009, p.189). Hence, the contaminant implicated in e-waste is not only the issue within the e-waste receiver countries but ultimately to humans in other countries. 4. E-waste solutions 4.1. Organisation and government policies Problem of most electronic products currently is a lack of the concept for reuse and recycle in their products. Producers should focus on creating reusable products and provide a rule of e-waste take-back at the obsoleteness. There are several ongoing projects to create environmentally-friendly electronic products and recycle policies in several States in the US, Canada and EU countries. These challenges encourage product makers to design for remanufacturing in order to minimise disposal of harmful components of electrical equipment, share design information, and protect against negative health and environmental impacts along with organisations and governments policies. 4.2. Deposit fees for recycling and guidelines It is important to raise capital in order to introduce and continue with the recycling approaches. However, the cost of electronic products generally does not include extra fees for e-waste collectors and recyclers (Deathe, MacDonald Amos 2008, p.327). In California, consumers pay fees when they purchase a certain type of electronic devices so that the budgets will be used for managing these devices (Gibson 2006, p.324). Similarly, a Statewide Computer Recycling Pilot Program in Maryland requires computer manufactures to submit fee for the state recycling (Gibson 2006, p.328). In addition to the recycling fee, it is necessary to be implemented guidelines and legislation in order to manage or define hazardous substances in electronics. Several states in the U.S. , Canada and EU countries set disposal guidelines or regulations, and have banned the sale of certain electronic devices that contain specific hazardous materials (Gibson 2006, p.324; Deathe, MacDonald Amos 2008, p.329). 4.3. Design for Environment For producers, it is also crucial to review the design of their products more environmentally-friendly to create recyclable and reusable products. To do so, it will be necessary to determine guidelines or policies in order to standardise the implementations. The International Standards Organisation has standardised the implementation of design for environment and instruct producers to create a roadmap of product design in order to minimise environmental issues (Deathe, MacDonald Amos 2008, p.322). Huang (2009, p.116-119) proposes Sustainable Systems Development Lifecycle (SSDLC) that on each stage of product developments; Planning, Analysis, Design, Implementation, Maintenance and Disposal, producers should consider sustainability for the products. With regard to new products, these policies and regulations will protect against negative health and environmental impacts. For existing waste, for instance, the EU WEEE Directive requires for producers to be assigned financial responsibi lity based on their current market share (Deathe, MacDonald Amos 2008, p.326). These will reduce a product ¿Ã‚ ½fs hazardous footprint. 4.4. Producer Take-Back Programmes Another approach for producers is e-waste take-back programmes. Products are taken back to the producers or take-back disassembly centres to disassemble safely (Xu 2008, p.1). Since electronic devices are made intricately, it must be difficult and unhealthy for the workers to break down the parts in e-waste receiver countries where there is little knowledge of disassembly. Instead of e-waste being exported to developing countries, it would be environmentally effective to take-back the e-waste within the producer countries. The use of Radio Frequency Identification (RFID) for each electronic will be easier to track the process of e-waste take-back when they are obsolete (Xu 2008, p.1). If the products still can be used then they can be transported to second-hand makers for sale while there is no value (Xu 2008, p.2). Hewlett-Packard, Dell and Apple have already introduced their own take-back programmes in Canada (Deathe, MacDonald Amos 2008, p.322). RFID also provides excessive range of information on their products. 5. Conclusions ?

Physics Prac - Mesuring Wavelengths Of Light :: essays research papers

Aim: To determine the approximate value of l for red light using a diffraction kit. Theory: Diffraction of light is one explanation of the wave theory of light. Francesco Grimaldi first observed this type of behvaiour from light. However, Thomas Young was the scientist that was able to derive a mathematical formula where l can be calculated. The original experiment involved sending white light into a screen with two small holes to serve as point sources. The light from these sources was then projected onto a screen and light and dark bands were observed. The mathematical formula could then be used after taking certain measurements. Equipment: Light source (Ray box), Red cellophane, Double-slit slide, and Measuring rod (can be already attached to Ray box. Method: 1.  Ã‚  Ã‚  Ã‚  Ã‚  Set up the ray box and place red cellophane in clip so that it is over the bulb. 2.  Ã‚  Ã‚  Ã‚  Ã‚  Switch on ray box and stand approximately two meters away from the ray box, hold the slide up to your eye and look through one of the double slit patterns into the light. Observe disturbance pattern. 3.  Ã‚  Ã‚  Ã‚  Ã‚  While looking through the slide, have someone move the white marker along the slide rule until its edge is approximately halfway inside a dark or light band. 4.  Ã‚  Ã‚  Ã‚  Ã‚  Take measurement down and then repeat step 3 and gain measurement for other dark or light bands. Results: The results gained from the experiment were conclusive and accurate when compared to the original value for l for red light. Below is a table of the measurements recorded and calculations to gain l. Calculation (con't): The value d was calculated by placing the slide in a projector and then on the whiteboard (acting as a screen), marks were made. The slide had a measurement of 1cm and from this the ratio 35:1 was established. Measurements were then made and the slides actual measurements were determined. For this particular experiment, the slide marking D was used. L was measured also using simple trigonometry. The person viewing through the slide sat at a table and then looked down at the ray box on an angle.

Impact of Imagery Essay -- essays papers

Impact of Imagery The use of imagery in a short story has a great deal of effect on the impact of the story. A story with effective imagery will give the reader a clear mental picture of what is happening and enhance what the writer is trying to convey to the reader. William Faulkner exhibits excellent imagery that portrays vivid illustrations in ones mind that enhances, â€Å"A Rose for Emily†. The following paragraphs will demonstrate how Faulkner uses imagery to illustrate descriptive pictures of people, places and things that allow Faulkner to titillate the senses. â€Å"It was a big, squarish frame house that had once been white, decorated with cupolas and spires and scrolled balconies in the heavily lightsome style of the seventies, set on what had once been our most select street† (287). Faulkner starts the story off with a mental picture of Emily’s house to be an old Victorian house. It is on a street that is commercializing which makes the house stand out and appear out of place. A description of Emily discloses her similarity to the house. â€Å"She looked bloated, like a body, long submerged in motionless water, and that of palled hue† (288). Faulkner describes her like this so that the reader may picture a pale, older woman, who seemingly hasn’t done much but eat, having no muscle tone, and clumps of fat more or less clinging to her body. She was sickly old woman. An even closer look at her face reveals â€Å"her eyes, lost in the fatty ridges of her face, looked like two small pieces of coal pressed into a lump of dough† (288). This description enhances the mental picture of Emily even more. The overly chubby face, gives the reader a definite mental picture of an old and obese woman. Faulkne... ...uched for many years, collecting dust and fading in color. As the room is being described, the reader almost should feel as if he or she is one of the neighbors who just broke down the door. If the reader felt as if he or she was in the story, Faulkner successfully and effectively created imagery. When the writer successfully creates imagery, the reader should be able to have a clear mental picture of what is happening and feel as if they are looking through the narrator’s eyes. William Faulkner displays excellent imagery which helps the reader better understand the real meaning of the story. Faulkner’s imagery of the people, places, and things in his stories, creates a painting type image, which truly titillates the senses. Bibliography: Works Cited 1. Barnet, Sylvan. An Introduction to Literature. Eleventh Edition. Longman Inc. New York, 1997.

Supraclavicular Brachial Plexus Block Health And Social Care Essay

The brachial rete is a complex agreement of nervus fibers arising from the spinal column via the ventral rami of the 5th cervical to the first thoracic nervus roots. It proceeds through the cervix, armpit and into the arm where it terminates into single peripheral nervousnesss most notably average, radial, ulnar and musculocutaneous nervousnesss. These nervousnesss contribute motor and centripetal nervus supply to the upper limb. Barricading these nervousnesss near to their beginning between the cervix and the axilla is called brachial rete block. Supraclavicular block is used to providesurgical anesthesia and postoperative analgesia forthe upper limb operations. The brachial rete traditionally performed via interscalene, supraclavicular, infraclavicular and alar attacks with clinically of import advantages and disadvantages of each. The supraclavicular attack is popular for surgery affecting the manus to the elbow,1 and the brachial rete can be easy visualized by puting an ultrasound investigation at the base of the cervix merely above the collarbone. Ultrasound is used routinely for supraclavicular brachial rete blocks forsurgery affecting the manus, forearm or the cubitus. Surveies have shown that ultrasound improves the efficaciousness and safety and clip to execute the the block.2,3,4 With the blessing of the Local Ethics Committee, a prospective survey will be conducted in up to 40 ASA I, II or III patients of either sex undergoing elected upper limb surgery. A verbal account of the test, patient information sheet will be provided by the attention ( clinical/medical ) staff for the patient to see which will be about 6 hebdomads before the twenty-four hours of surgery. This will include elaborate information about the principle, design and personal deductions of the survey. When the patients will be admitted to the infirmary, they will be approached by one of the research workers farther information and account for any inquiries to assist them take an informed determination on engagement or non-participation into the trial.Following information proviso, patients will hold at least 24 hours to see engagement and will be given the chance to discourse the test with their household and health care professionals before they are asked whether they would be willing to ta ke portion in the test. The chief research worker or the co-investigator will accept the patients. All are qualified by experience and educational course of study as an anesthetic physician to take the consent for this in their everyday pattern. Assenting patients will so be officially assessed for eligibility and invited to supply informed, written consent. The right of the patient to decline consent without giving grounds will be respected. Further, the patient will stay free to retreat from the survey at any clip without giving grounds and without prejudicing any farther intervention. A transcript of the consent will be given to the patient, one filed in the Trial Master File, one filed in the infirmary notes and a 4th transcript sent to the Sponsor. For the supraclavicular block, the brachial rete will be visualized utilizing a Sonosite Titan ultrasound machine with 10MHz additive investigation. The overlying tegument will be infiltrated with 1 % lignocaine and a nervus block acerate leaf passed under ultrasound counsel so that its tip lies next to the brachial rete. After negative aspiration on the needle the survey dosage of bupivacaine will be injected. This will be done under ultrasound visual image to guarantee right location of the acerate leaf is maintained. Bupivacaine will be prepared newly for each patient. Efficacy will be assessed at 15-minute intervals for up to 45 proceedingss at the centripetal dermatomes of the average, ulnar, radial and musculocutaneous nervousnesss in the upper limb to cold utilizing an intoxicant swab ( i.e at 15, 30 and 45 proceedingss after the injection is finished ) . Failure to accomplish loss of cold esthesis with intoxicant swab at all four of the centripetal dermatomes of the average, ulnar, radial and musculocutaneous nervousnesss in the upper limb after 45 proceedingss will be considered uneffective block. This will be considered as the terminal of the survey for the participant and repetition injection utilizing 5 to 10 milliliters of local anesthetic will be done under ultrasound counsel. This will non ache because the local anesthesia of the overlying tegument from the old injection normally lasts more than 2 hours. The following patient will so have a dosage based on the CRM. The block will be assessed by the co-investigator who will non be present during the behavior of the block and hence will be wholly blind to the dosage used. The topics will non be cognizant of the dosage of the local anesthetic used. The survey is therefore double blinded since the topic the research worker and the assessor are blinded to the dosage of the local anesthetic used. The blinding of the survey will take the prejudice that may be at that place if the individual executing the block assesses the block every bit good.Statistical considerations & A ; power analysisPersonal and surgical inside informations will be collected and the informations will be presented as average ( interquartile and scope ) or per centum as appropriate. The minimum effectual dosage ( MED95 ) will be estimated utilizing CRM. Our confederates, Dr Sylvie Chevret and Dr Sarah Zohar will supply the statistical expertness for the current test. These confederates are experts in the field of CRM and have advised that a sample size of 40 patients is sufficient in theory to supply an reply to the inquiry of ED95. The design of this dose-finding, double-blind survey was chosen in order to measure the dose-response relationship of bupivacaine for supraclavicular brachial rete block utilizing ultrasound. The CRM ( Oaa‚ ¬a„?Quigley et al 1990 ) 6 utilizing a alteration in order to command outliers observations ( Resche-Rigon et al. 2008 ) 7 will be used in order to find the minimum effectual dosage ( MED ) of Bupivacaine for supraclavicular brachial rete block of 95 % of patients. The CRM is consecutive Bayesian method based on a one-parameter theoretical account, which aims at gauging the percentile of dose-response among thousand distinct dose degrees di ( i=1, †¦ ,5 ) . Each one of the six dosage degrees was randomly associated by the research worker ( harmonizing to his/her personal experience and available informations in the literature at the clip of induction of the test ) with the following prior estimated success chance, 0.5, 0.75, 0.90, 0.95, 0.98 and 0.99 for the 12, 15, 18, 21, 24 and 27 volume integrity dose severally. Then, a one-parameter power theoretical account will be used to suit the dose-response curve, with an exponential anterior distribution ( with mean = 1 ) for the theoretical account parametric quantity. The posterior response chance of each dose degree will be re-estimated after each new inclusion of cohort patients ( 2 patients per cohort ) ( see following page ) . The allocated dosage to each new cohort of patients was the dose degree with the updated posterior response chance closest to 0.95. In the present survey, the first cohort of patients will have a lading dosage of 21 volume units with the anterior success chance closest to the mark ( 0.95 ) . The MED is defined as the dose degree among the six chosen dose that had a concluding response chance closest to the mark. The determination to stop the survey was based on halting standards, in order to observe whether all doses were likely to be inefficient or a suited appraisal of the MED has been reached ( Zohar and Chevret 2001 ) .8

Fundraising Letter: organising the Lent Appeal

Dear Parents/Carers, I am delighted to inform you that we are organising the Lent Appeal once again this year. Blue Coat was founded many years ago as a charity school which provided education and guidance to the poor people in and around Walsall. A prevalent part of the Christian faith is to treat others as you wish to be treated and at Blue Coat we strive to achieve this from all pupils. As a Church of England Academy we celebrate special events in the Christian calendar, including Lent. We believe that being benevolent forms a part of our Christian philosophy, and even though there are many different faiths at Blue Coat, charitable giving is a fundamental part of all faiths. The Lent Appeal project aims to raise as much money as possible for our chosen charity and support those in need. We have been raising thousands of pounds for many different charities over the past few years with the support of students, teachers and parents. Last year we accumulated over  £3,000 for the charity Islamic Relief, and this year we are hoping to raise even more but in order to achieve this we will need your continued support. The event will take place during the Easter period as a commemoration of the forty days that Jesus spent in the desert making sacrifices. We remember this time by encouraging pupils to give up their time and money just as Jesus gave up his life for others. Each year the pupils are given a voice. During a vote they select which charity they most want to raise money for. This year the majority of the pupils nominated Water Aid. They use practical solutions to supply clean water, effective sanitation and education to the world’s underprivileged people. In addition they try to influence education policy at national and international levels. They are presently operating in twenty seven countries mainly situated in the Africa, Asia, Pacific region and Central America continent. This specific charity also provides safe aquatic and public health services close to people's homes. Furthermore, their projects allow communities to attain a more robust quality of life and escape the spiral of poorness and specialise in fairness. During the Lent period we ask both parents and students to support our fundraising events and take part in extra-curricular activities that are led by teachers. We like to allow students to take ownership over raising money, with the support of their form tutors to help build self-confidence, team work skills and understanding the importance of helping others. There are many ways in which you can offer support; firstly encourage your child to take part in all events, attend after school events such as; fashion shows and X Factor. There will also be friendly competitions between the different colleges to help raise money for Water Aid and we would like your child to take part in at least one. You can obtain further information regarding the project by either visiting the school website or collecting a leaflet from the school reception. Once the Lent Appeal is over, the money will be collected together by a member of staff and the total calculated. The grand total will be announced in a special church assembly with a cheque awarded to a representative of the charity. To encourage pupils to support the Lent Appeal there will also be certificates awarded to individuals, forms and colleges who have raised the most amount of money and shown a high level of commitment. I hope I have covered all of the information you need however if you would like any further details please do not hesitate to contact me. Thank you in advance for your continued support.