Early Childhood Education Essay Example for Free

Early Childhood Education Essay The access to a high-quality education has become a major issue for many developing school districts in the United States; more importantly, access to a high-quality early childhood education is even further limited to many families not just because of a lack of access, but because of a lack of resources in the United States public school system. Currently, early childhood education is not available for every student in the country and is not universally supported, but developing research around these young students has proven that an early childhood education will contribute to higher graduation percentages, reduced crime rates, higher  annual salaries, and an 8:1 return on economic dollar investment throughout their lifetime—thus producing high-quality citizens. Because of this, optional early childhood education programs should be funded at both the state and federal level and universally supported. Most often, early childhood education is targeted at three to five-year old children before entering elementary school, but many research studies and programs will identify early childhood care and education just as important for this age group as it is for children up to eight years of age. Programs for these children can be either school-based or center-based in urban or  rural areas (Early Education for All 2011). Each year between birth and the age of eight marks a time of exponential brain growth and helps to lay the foundation for subsequent learning and development. Since these years are marked by remarkable brain growth, early childhood is the prime age period for children to receive a quality education (National Education Association ! ROIGER! 2! 2014). It seems as if it is almost clear-cut, a quality early childhood education should be available to all children of the United States in order to help build future societal contributors. Spodek and Saracho’s book, Handbook of Research on the Education of Young Children, reaches beyond its title and touches on the theory and practice of early childhood education. The authors define these three areas as independent pieces in society’s perspectives, but interrelated in reality. Throughout history, early childhood education has been practiced for much longer than it has been researched. Until the last 50 years, when early childhood education became a hot topic in many funding debates, not a lot of researchers had initiated any studies. As early  childhood education development became more popular as a result of developmental psychology interest, Spodek and Saracho started to identify the chain of steps in expanding early childhood education in the United States and investment resources to train educators (Spodek and Saracho 2006). A major concern of early childhood education experts in the United States is the lack of funding, support, and resources available to allow these childcare programs to inhibit growth. In the past few months, funding has been difficult to obtain because of sequester cuts in federal  government funding, but it has been even more difficult to obtain state funding because of the lack of ability to borrow money at the state level or find new revenue. The support for early childhood education is currently limited because of the scarce information known to the public about this issue. Early childhood education is in fact a very bipartisan issue, despite more initiatives from liberal individuals to make these programs a reality. The trouble with supporting early childhood education programs is that most constituents are unaware of the impact it really  has on our society. ! ROIGER! 3! W. Steven Barnett of Rutgers University Center for Early Education explains early childhood education from his expertise in chapter one of School Reform Proposals: The Research Evidence. Children involved in the studies within the first chapter had a disadvantage compared to average students and were more likely to repeat a grade or fail a class. Research from the Child Parent Centers in Chicago sampled 1,500 children ages three to nine with extended elementary programs; the results that came back were more than reassuring. Students  who participated in the program were less likely to be placed in special education, repeat a grade level, or be placed under juvenile arrest. Additionally, these students placed higher on reading and math placement tests, and they also had a higher graduation rate compared to the other test groups. The research documented that achievement gaps were even better for this group if students were from high-poverty neighborhoods. Barnett supports early childhood education expanding to optional everyday schooling before kindergarten, and documents positive effects on a child’s long-term social and economic development. (Molnar and Barnett 2002). Soni Sangha, classified as a middle-class family member of New York City, wrote for a column in the New York Times about her struggles finding affordable access and availability to a public preschool program for her firstborn child. Sangha isn’t alone; several families are being rejected to a public school early childhood education because of lack of resources to educate all children in the state of New York. These families are being forced in a co-op early childhood education, which involves the active participation of parents providing facilities and materials to  a group of children at the lowest maintainable cost possible (Sangha 2011). While this method of education is certainly beneficial and better than no education at all for young children, Barnett’s optimal early childhood recommendations include trained professionals with bachelor degrees in the field educating these youth (Molnar and Barnett 2011). However, because Sangha’s family ! ROIGER! 4! didn’t have access to a public early education program, they had to settle for less than what they were hoping for. Art Rolnick is the senior fellow and co-director of the Human Capital Research  Collaborative in the University of Minnesotas Humphrey School of Public Affairs, as well as the former director of research at the Federal Reserve Bank in Minneapolis. Rolnick began his work in early childhood education almost on accident; he was recruited reluctantly to sit on the board for an early childhood organization known as Ready4K. Rolnick immediately saw the benefits of this early education, not just psychologically but also logistically (Schmickle 2012). As expert economists, fellow colleague Rob Grunewald and Rolnick discovered that high quality education  for disadvantaged young children created a 16% economic output with inflation-adjusted rates (Rolnick and Grunewald 2003). The facts played out over not just one longitudinal study but four longitudinal studies. Every study came back with consistent results: early childhood education is an unbeatable source of public investment. The capstone of these studies, known as the Perry Preschool study, found that every dollar invested in one particular underprivileged preschool program yielded over eight dollars in return. The same study again found lower arrests, higher  salary earnings, more graduations, and overall better learning achievements across the education system throughout elementary and secondary schooling (HighScope 2005). Early childhood education can make a significant impact almost right after birth if a particular individual demands it. For example, a CBS Denver newspaper highlighted Elle, who was a normal baby. However, once she turned 1 ? years old, she started to need more books, games, attention, and interaction. Her parents made a guilty decision of signing her up for two days of school each week even though she had the rest of her life to go to school. After several weeks in the program, the parents felt no remorse as Elle started to thrive in her classroom. Elle’s ! ROIGER! 5! parents later even described it as one of the best things they could have possibly done for Elle (CBS Denver 2013). This Denver toddler proved that early education could make an impact at the speed of which the brain develops, and the solution is to make sure every family has access to this training and development of children. Another concern that has recently been on the rise in early childhood education is retaining individuals to work in these childcare programs. Like any other teacher or care worker, low salaries don’t help to pay potential student loan payments among a host of other financial contributions. According to the Minnesota Department of Employment and Economic Development, pre-school teachers earn an average of $15. 74 per hour and childcare workers receive about $10. 50 per hour. Even bank tellers and janitors earn more money on average per hour than a childcare worker at $11. 91 and $11. 65, respectively. Because pay is low, demand is high. There are 28,422 childcare workers just in Minnesota and that number is expect to increase  by nearly 25% in the next decade (Regan 2013). Because of this demand, trained childcare workers and educators are needed in addition to financial support to make early childhood education a public reality for any family who wishes to enroll. Early childhood education is a growing trend in our society, and the access to it has become a growing issue. Funding is the best solution to this issue, but reform may also help play a major role in the future. Other states, for example, have started to allocate resources differently in their early learning programs. In 2005, Maryland appointed a director of early learning, whose  job was to clean up Marylands current early childhood education program and create sound efficiency. As a result of the appointed director, Maryland has helped 20,000 more children become ready for the first day of school (Maryland Department of Education 2014). The White House currently has many programs that focus on engagement of early learning, but the state of ! ROIGER! 6! Minnesota does not have many well-known programs that are specifically targeted for early learners. One of these programs through the White House is Race To The Top: Early Learning  Challenge, which allocates funds to states who are preparing their children for kindergarten more readily. Another very well known federal government early learning program is Head Start. Head Start programs give needy children the opportunity of receiving an early learning education. However, the program does not expand to every single need child in America, which creates many difficulties for all of the children who are in need of an early childhood education. Currently, the President is looking for ways to expand Head Start to more families in America. In  a time of economic crisis, the best way to deal with this problem from Head Start is through more funds. Both the Early Learning Challenge and Head Start have links at the state government level, but are largely projects of the national government. Minnesota needs to create a successful early childhood education environment in our state, and here is how we are going to do it. Experts recommend that the federal government quadruples funding for Early Head Start programs and maintain the level of funding on a yearly basis (Kagan and Reid 2009). There is no doubt that these programs cannot pay for themselves,  so the funds have to come from an alternative source besides the federal government. Minnesota’s cigarette tax recently increased from $1. 23 to $2. 83 per pack, and while this is one of the leading tobacco taxes in the country, it should be increased even further to total a tax of $3. 00 per pack. If the revenue from this increase were to be proportional to that of the most recent tax increase, the state would raise $223 million to invest into early childhood education programs (Hammersley 2013). ! ROIGER! 7! Even this simple solution would be an incredibly large increase in early childhood  education and childcare funding compared to the Ohio legislature, which passed measures of $30 million in additional funding for this fiscal year as a result of 2,100 child slots cut along with 307 staff jobs across the state due to sequestration. According to Gayle Kelly, executive director of the Minnesota Head Start Association, Minnesota will have 760 childcare positions in Head Start cut itself (Pew 2013). Imagine how $223 million in revenue from tobacco taxes could impact those 760 children, in addition to several thousand more. An additional opportunity to access funding for early childhood education programs is  putting the issue on a priority list compared to professional sports stadium construction and evaluating the best source of funding. This is one way that the public perception of early education programs might change and allow research to be initiated. Often times, the construction of huge entertainment attractions is viewed as an investment in economic development. However, early childhood education and childcare programs are also an economic investment. Because of one dollar invested into the program, eight dollars is turned back into the economy. This results from a higher standard of living due to a better job and a better  environment to grow up in compared to someone who might grow up in poverty. Not only are they an economic investment, but society also receives a social investment that entertainment complexes cannot reach. Early childhood educates builds better human beings by reducing crime rates, raising educational capacities, and preparing children to be future career workers. Early childhood education programs are very beneficial to our country. They are important because they contribute to the growth of well-rounded citizens who have active engagement in social, economical, and political engagements. The federal government has implemented programs, but they are also needed at the local and state level to have a larger ! ROIGER! 8! impact on these young children. Implementation of these programs, such as that of the Maryland coordinator, would help create an efficient early childhood education learning environment in Minnesota. Early childhood education is important because it fosters growth from birth until the age of eight years old, which is when 90% of the brain’s learning is developed. If children are to learn anything in their life, they must start to learn at the beginning of their lifetime. One child  from an early childhood education program could end up being soccer mom of the year in Manhattan or the first female president of the United State—but that will only happen if there is funding to help that child unlock her potential. ! ROIGER! 9! Works Cited Early Childhood Education. Salaries. N. p. , n. d. Web. 7 May 2014. http://www. earlychildhoodeducation. com/salaries/. Early Childhood Education. CBS Denver. N. p. , 4 Mar. 2013. Web. 15 Apr. 2014. http://denver. cbslocal. com/2013/03/04/early-childhood-education/. Early Childhood Initiatives. Improving School Readiness ~ Ensure Success ~ Instruction ~ School Improvement in Maryland. N. p. , n. d. Web. 15 Apr. 2014. http://mdk12. org/instruction/ensure/readiness/. Early Education for All. What is Early Childhood Education?. Education. com. N. p. , 20 Dec. 2011. Web. 14 Apr. 2014. http://www. education. com/reference/article/Ref_What_Early_Childhood/. Hammersley, Phillip. Minnesota: Higher Income and Cigarette Tax Making It the Land of 10,000 Taxes?. Tax Foundation. N. p. , 3 July 2013. Web. 6 May 2014. http://taxfoundation. org/blog/minnesota-higher-income-and-cigarette-tax-making-it- land-10000-taxes. Kagan, Sharon Lynn, and Jeanne L.Reid. Invest in Early Childhood Education. The Phi Delta Kappan 90. 8 (2009): 572-576. Print. Molnar, Alex, and W. Steven Barnett. Early Childhood Education. School Reform Proposals: The Research Evidence. Greenwich, Conn. : Information Age Publication, 2002. 1-26. Print. Perry Preschool Study. HighScope. N. p. , n. d. Web. 6 May 2014. http://www. highscope. org/content. asp? contentid=219. Pew, Adrienne Lu. Head Start Hit with Worst Cuts in its History. USA Today. N. p. , 20 Aug. ! ROIGER! 10! 2013. Web. 6 May 2014. http://www. usatoday. com/story/news/nation/2013/08/19/stateline-head-start/2671309/. Regan, Sheila. Paying Early Childhood Educators What They Are Worth. Twin Cities Daily Planet. N. p. , 1 Mar. 2013. Web. 7 May 2014. http://www. tcdailyplanet. net/news/2013/02/27/paying-child-care-workers-and-pre-k- teachers-what-they-are-worth. Rolnick, Arthur J. , and Rob Grunewald. Early Childhood Development: Economic Development with a High Public Return. The Federal Reserve Bank of Minneapolis. N. p. , 1 Mar. 2003. Web. 6 May 2014. http://www. minneapolisfed. org/publications_papers/pub_display. cfm? id=3832. Sangha, Soni. The Pre-K Underground. The New York Times. N. p. , 17 Dec. 2011. Web. 14 Apr. 2014. http://www. nytimes. com/2011/12/18/nyregion/underground-pre-k-groups- often-illegal-abound-in-new-york. html? pagewanted=all_r=1. Schmickle, Sharon. Making the Case for Early Ed, Art Rolnick Has Had Enormous Impact. MinnPost. N. p. , 16 Apr. 2012. Web. 14 Apr. 2014. http://www. minnpost. com/driving- change/2012/04/making-case-early-ed-art-rolnick-has-had-enormous-impact. Spodek, Bernard, and Olivia Saracho. Handbook of Research on the Education of Young Children. 1982. Reprint. Mahwah, N. J. : Lawrence Erlbaum Associates, 2006. Print.

Water Decontamination Methods Advantages and Disadvantages

Water Decontamination Methods Advantages and Disadvantages Outline Abstract In Malaysia, for the past many years, drinking water treatment was only limited to water disinfection by using chlorine; however it had been concluded that its use in potable water treatment can be harmful to human health.(Subedi, et al., 2012) Following the development in drinking water treatment, conventional methods in three different technologies are available to have more purified water. They are biological, physicochemical and advanced oxidation process (AOPs) technologies. Each of the technologies has different roles in purifying water and they can be combined to treat drinking water as well. In this assignment, the lists of methods of each technology are stated and some of the main processes are discussed, including the advantages and disadvantages of each of them. For biological technology, slow sand filtration and perchlorate processes are discussed in 3a.For physicochemical technology, coagulation process is discussed in details in 3b. Lastly, the advanced oxidation proces s, AOPs, include both photochemical and non-photochemical oxidation. The fenton system and photocatalytic processes which are categorized in photochemical oxidation are discussed in 3c. Introduction Safe drinking water that free of contaminants is essential to human health and development issue at national, regional and local levels. Its accessibility is human’s rights and a component of effective policy for health protection. (who et al) Therefore, there are many drinking water regulations and acts set by specialized agency such as WHO to have standard on safe drinking water to give awareness to public and thus limit the levels of contaminants. The national primary drinking water regulations and number of regulated contaminants shown in Figure 2.1 and Figure 2.2 in appendix 2.According to the regulations and standards, the characteristics of safe drinking water are contaminants free, natural minerals rich, alkaline pH, taste good and odorless. Firstly, microbiological and chemical contaminants in drinking water may cause acute or chronic health effects or undesirable aesthetic properties when present at excessive concentrations. Microbiological contaminants refer to path ogenic microorganisms such as bacteria, viruses and protozoan parasites. Chemical contaminants refer to toxicity, inorganic and organic chemicals. The other contaminants are pesticides, herbicides and radioactive materials (radionuclide). Besides that, pH of water should be maintained from 6.5 to 8.5. This is because alkaline water is able to neutralize stored acids and help in eliminating toxins. Because of these, various types of technologies of drinking water treatments are introduced to minimize the deleterious effects of contaminated drinking water on human health. Details of contaminants by National Secondary Drinking Water Standards and details of contaminants and potential health effects by National Primary Drinking Water Standards as shown in Figure 2.3 and Figure 2.4 respectively in appendix 2. In the following, three different technologies which are biological, physicochemical and advanced oxidation process (AOPs) are introduced to treat drinking water to a safety level s o that human health is ensured. The goal of all of the developed water treatment technologies is to remove turbidity as well as chemical and pathogenic contaminants from drinking water source in the most affordable and expedient manner possible. 3.Content 3a.Biological Technology Water used for drinking and household use, even water from a ground water supply, should be treated before it is used to ensure it is safe and aesthetically pleasing. One innovative method of water treatment is biological water treatment. Biological drinking water treatment is one technology that has the potential to further many of these objectives. This technology is based on the ability of microorganisms – specifically non-pathogenic bacteria – to efficiently catalyze the biochemical oxidation or reduction of drinking water contaminants and produce biologically stable water. (Snoeyink, 1984) .Biological drinking water treatment is often used in combination with other chemical and chemical processes including ozonation and filtration. There are some types of biological drinking water treatment such as slow sand filtration, rapid biological filtration, ozone-enhanced biological filtration and granular activated carbon biological adsorption. Firstly, the slow sand filtration is a type of centralized or semi-centralized water purification system. A well-designed and properly maintained slow sand filter (SSF) effectively removes turbidity and pathogenic organisms through various biological, physical and chemical processes in a single treatment step. According to (Patrick J. Evans, 2010), slow sand filtration involves very low filtration rates (e.g. 0.04 to 0.10 gpm/ft2) through sand media without pre-oxidation or pre-disinfection (Awwa, 2005). During initial operation of slow sand filtration, a layer of biological matter will be produced on the surface of filter media by the separation of organic matter and other solids. This layer is called as schumutzdecke which acts as the predominant filtering mechanism. It supports the biological matter that works as the primary biofiltration process to remove BDOC, pathogenic microorganisms, and particulates (Page, 2006).To maintenance the slow sand filtration process, periodic scrap ing and removal of the top layer of sand are needed. Besides that, there is another more precise term to replace slow sand filtration which is called biological filtration (SBF) since the biologically active schmutzdecke is an integral part of this process. Besides that, the advantages of slow sand filters is very effective in improving the microbiological and physicochemical qualities of water and it is very easy to operate and maintain. The disadvantages of slow sand filters are vulnerability to clogging when the incoming water is of high turbidity. When dealing with such waters, pre-treatment, such as sedimentation or roughing pre-filtration is required. Next, biological perchlorate or nitrate process. Perchlorate and nitrate have the ability of being anaerobically biodegraded to chloride and nitrogen gas. (Patrick J. Evans, 2010) stated the process involves addition of an electron donor such as acetic acid plus nutrients to water to promote biochemical reduction of biological perchlorate or nitrate process. Moreover, perchlorate and nitrate act as the terminal electron acceptors for respiration by these bacteria. As a result, BPNP vary from the predate biological drinking water treatment processes that are aerobic and employ aerobic bacteria that use oxygen as a terminal electron acceptor for respiration. BPNP can be employed in diverse arrangement including packed beds, fluidized beds, and membrane systems. BPNP is followed by an aeration process to promote aerobic biodegradation of assimilable organic (AOC) and biodegradable dissolved organic carbon (BDOC) in combination with a filtration process for turbidity removal. 3b.Physicochemical Technology Physicochemical drinking water treatment is frequently used in the area of drinking water treatment. This technique is applied to remove the heavy metals, oils and suspended matters. This physiochemical drinking water treatment technique is used to treat drinking water in order to become process water. According to (Spellman, 2009)the steps that are under this technique are coagulation, flocculation, sedimentation, filtration, disinfection and arsenic removal from drinking water. The coagulation process that occurs in this drinking water treatment technique will be discussed in details in this assignment. The definition of coagulation is the destabilization of colloidal particles.(L.Droste, 1997)The particles are coated with a chemically sticky layer that enables them to stick with each other, forming a large molecule and settle in a short period of time. The ability of an agent to agglomerate the tiny particles found in water is directly related to its charge. The other factor that will affect the ability is the size of synthetic polymers. The most common materials that are used to coagulate the water are alum (aluminum sulfate) and iron salts. (L.Droste, 1997) stated that the multivalent characteristic of these coagulants effectively attracts them to charged colloidal particles and their high insolubility helps to ensure their removal from the water to a high degree. When coagulant such as alum is being added into the water, a chemical reaction that produces positively charged will occur. This reaction will indirectly reduce the electrical charges of the particles and hence form a sticky substance which also known as floc. In this reaction, turbidity, color and microorganisms can be removed easily. The formation of floc is the primary step of coagulation process. For perfect efficiency, intimate, rapid mixing of the water must be done and coagulant must be present. After mixing, the water should be stirred slowly so that the particles can stick to each other forming a large molecule. According to (Spellman, 2009) , the factors that will affect the coagulation process are pH, turbidity, temperature, alkalinity and he use of polymers. The degree to which these factors affect coagulation process relies on the type of coagulant use. The condition of raw water, optimum pH to coagulate the water and other factors must be taken into account before making decision on which chemical to be used. According to(E.Manathan, 2009), the main advantage of using this technique is lower cost compared to biological treatment. It requires less worker force and able to settle the issues regarding toxic materials effectively. On the other hand, it has its disadvantage too, which is require careful operator control and use up huge amount of energy. 3c.Advanced Oxidation Process (AOPs) Advanced oxidation process (AOP) is an oxidation process which affects water treatment by generating a sufficient quantity of hydroxyl radicals.(Goi, 2005) Hydroxyl radicals (†¢ OH), are non-selective reactive species, helps to oxidize pollutants into mineral end-products, yielding CO2 and inorganic ions.This process can treat those organic pollutants with high chemical stability and low biodegradability which cannot be treated by conventional techniques. Basically, refractory compounds cannot be removed efficiently by conventional biological processes, but AOPs will do and help to improve the overall compound removal efficiency in water treatment. Refers to Figure3.1 in appendix 2, in biological systems, AOPs are used as pre- and post-treatment. The pre-treatment improve wastewater biological treatability by common microorganism whereas post-treatment is targeted on the contaminants removal which not completely done during the biological treatment. (Cesaro, et al., 2013) Organic contaminants such as halogenated hydrocarbons (trichloroethane, trichloroethylene), pentachlorophenol (PCP), detergents, pesticides, etc can be destroying by this process easily. Besides, the inorganic contaminants (cyanide, nitrite, and sulfide) can be oxidized by this process. Non-photochemical and photochemical methods are used to generating the OH radicals. These two methods are as shown as table below: Fenton system In Fenton system, hydrogen peroxide (H2O2) acts as an oxidation agent. When hydrogen peroxide presents in excess, Fe (II) oxidizes to Fe (III) within few seconds or minutes and hydroxyl radicals will be generated. The reactions are as shown as below: Fe2+ + H2O2 → Fe3+ + OH– +.OH The catalyst used in this process is iron salts which generate ferric ion, Fe2+as the Fenton’s reagent. Besides, ozone (UV-light) and transition metal salts are used.Mostly, ironsalts are used as transition metal salts. (Munter, 2001)Under the UV-radiation, the felton’s reagent undergoes oxidation processes that utilize activation of H2O2, has high efficiency to treat the hazardous organic pollutants that present in water. (Albert, 2010) Fenton reagent uses in wastewater treatment to convert the contaminants to harmless compound such as carbon dioxide and inorganic salts. This Fenton’s oxidation is the most efficient method in removing effluent toxidity and color compare to coagulation-flocculation process. It helps to decrease the rate of chemical oxygen demand (COD), aromatic compounds, and total polyphenols in the wastewater. However, Fenton process also can be combined with coagulation to reduce flocs settling time, amount of COD, and enhanced color removal. Photo-Fenton-type oxidation is a process when Fe3+ ions added to H2O2/UV process, resulted Fe (OH)2+ complex in pH3 condition. Fe3+ + H2O →Fe (OH)2+ + H+ Fe (OH)2+ ↔ Fe3+ + OH When Fe (OH)2+ will further decompose into .OH and Fe2+ ions with the presence of UV light. Fe(OH)2+hv→ Fe2+ + .OH This type of reaction very relies on UV irradiation to start up the .OH generation. Besides, this UV irradiation can mineralize organic pollutants completely. Efficiency of Fenton/Fenton-like reagents with UV irradiation can be increased by efficient use of light quanta and photo-reduction of ferric ion.(Munter, 2001) Photocatalytic oxidation Photocatalytic oxidation is an alternative AOP method which introduced high energy (photons of ultraviolet light,UV) into the treatment system. Besides that, it is a potentially green chemistry drinking water treatment process. Throughout the whole process, no reagents are added and only relatively harmless catalyst TiO2 and sunlight (source of UV) is needed. Solid titanium dioxide, TiO2 is used as the photocatalyst leading to chain reaction for the production of HO. free radicals. (E.Manathan, 2009) When the surface of TiO2 is irradiated with ultraviolet radiation, â€Å"holes† (h) are generated at sites where excited electrons (e) are produced: TiO2 +hv → TiO2 (h + e) The surface holes may take electrons from dissolved hydroxyl ion to produce reactive hydroxyl radicals on the TiO2 surface: TiO2 (h) + OH → OH. Refers to theFigure 3.2 in appendix 2, solar disinfection (SODIS) and solar photocatalytic disinfection (SPCDIS) are appropriate technologies for water disinfection of Cryptosporidium oocysts at household level. Cryptosporidium species are protozoan parasites that infect humans and causes diarrheal disease by the food-borne or waterborne routes. Cryptosporidium is capable to survive in the environment for long periods and even treated water is not guarantee to be safe from these infective parasites. Therefore, SODIS and SPCDIS are introduced to deactivate these microorganisms to reduce the risk of infection. SODIS and SPCDIS are both using the same method to reduce the oocyst viability. Both of them involve storing contaminated drinking water in transparent containers that are placed in direct sunlight before consumption.The disinfection effect of sunlight only occurs at temperatures exceeding 45 à ¢Ã¢â‚¬Å¾Ã†â€™. Therefore during cloudy conditions, this process may take a longer time to ensure the safety of the drinking water. Photocatalytic disinfection, SPCDIS uses the non-toxic photocatalyst, TiO2 to enhance and accelerate the inactivation rate of the parasites. For SPCDIS, the photocatalyst particles would have to be removed after solar exposure and before consumption. Due to this additional step, the probability of compliance within communities in developing countries is low and lead to the inefficiency of the treatment. In order to overcome this problem, this photocatalyst,TiO2 has been isolated onto some form of coated flexible insert, which would reside permanently within the SODIS reactor. Due to the effectiveness of the cheap, flexible insert coated with the non-toxic photocatalyst TiO2, the photocatalytic oxidation is recommended since it enhances the diminution of the oocyst viability by as much as 50%. 4.Conclusions The three technologies in treating contaminated drinking water used different methods to purify water. Each of them has advantages and disadvantages. They have faced respective challenges in terms of added research and development. Some of the common challenges are techniques for effective removal of emerging contaminants, synthetic chemicals and pesticides, as well as problems in dealing with spills of chemicals in navigable rivers and lastly the development of sustainable treatment. The challenge involving technological development is the needs of economic, appropriate, relevant and sustainable developing technology. (Ray Jain, 2011) In fact, three of the technologies can be combined to bring the greatest efficiency in water treatment process. For biological technology, the slow sand filtrationand perchlorate processes are discussed. The biological treatment is environmental friendly but the limitation of the processes are low effectiveness when the turbidity of water source is hi gh. For physicochemical technique, the method discussed is coagulation, one of the challenges it meets is large amount of energy consumption; whereas its future prospect could be get use of solar energy which is environment friendly. For AOPs, fentonand photocatalytic process are discussed. Both of the processes still need a further research about the fundamental concepts and reaction mechanism. It is because there are still much remain to be done in terms of maximizing its efficiency, by enhancing the performance-related properties of oxide materials. 5.References /abstract 1 /intro 2,3 *4+WHO *5+natural regulations *biological /physico 6,7,8 carson /aops9,10,11,12 /13,14,15,16,17,18 (6) /conclu19 1

How Much Land Does A Man Need Essay -- essays research papers

The story, â€Å"How Much Land Does a Man Need?†, by Leo Tolstoy is a story about Americans taking advantage of the Indians. Although it is set in Russia, it is about the greed that many people had at the time and the outcome of that greed. The opening scene represents the Europeans coming over to America. During that time, the mid-1800’s, the Europeans were rich and their relatives in America were poor. The younger sister in the story represents the Americans and the older sister represents the Europeans. The poor Americans, like the younger sister in the story, did not mind having to work hard all the time. They enjoyed their freedom and security. Even though they were content, it wasn’t complete. In the story, Pahom agrees with his peasant wife but wishes they had more land to work with. â€Å"Our only trouble is that we haven’t land enough. If I had plenty of land, I shouldn’t fear the Devil himself!† (p 212) The devil here is greed itself. It is here that we see the greed begin to manifest, as it did in Americans over a hundred years ago. The story goes on and we see Pahom becoming agitated the he has to pay fines all the time because of his animals wandering. This represents the American people having to pay fines, such as taxes and tariffs, to the government in the mid-1800’s. Pahom lives in a commune and some of the people have begun to buy their own tracts of land. He sees this and decides that it would be a good idea if he did the same thing. He was worried that if he didn...

Essay --

Joseph J. Ellis: Founding Brothers Founding Brothers a collection of stories by Joseph J. Ellis that discusses various events following the American Revolution and their impact on the budding Republic. The first theme talks about all key individuals that had a conglomerate of personalities and ideologies among the founding fathers. Because of this, it balanced the government and prevented one over arching outlook from sculpting the new government. This can easily transition into the second theme by Ellis. Despite the fact that this group of minds behind the birth of our government, had many different passionate perceptions on how said government be formed, they were still bound by close personal relationships. The second theme is present throughout the entire book. Especially in â€Å"The Dinner†, which I will discuss in more detail later on. Many of the important decisions early on were not only deliberated in public, but were also debated and contested in private at meetings and dinner parties. In the third theme, it was in their culminating interest to sweep slavery under the rug. Even though they knew it was an important issue, they also knew bringing it to public would wreak havoc on the new but feeble government. In the fourth theme, Ellis illustrates how the founding fathers used the advantages described in the previous themes to romanticized the interactions they had. They were very intelligent men who knew what kind of decisions they implemented would be important moments in history. They used their personal relationships in private meetings to shape how future generations would view them and the new government. They had specific control over how the events would be recorded. This made it easy for them to embellish wh... ...after the dinner conversation had ended. Jefferson was able to make â€Å"The Dinner† appear as though he brought Madison and Hamilton together for one fateful meeting that would determine the outcome of two of the most high profile decisions made in early government. Though the full scope wasn't probably apparent, Jefferson had a way of ensuring these types of meetings would universally be looked back on the way he wanted. Many of the discussions leading up to the dinner conversation were conveniently tucked away. This made the dinner conversation out to be much more important and decisive than it probably actually was. Ellis repeatedly touches these three themes throughout â€Å"The Dinner† to illustrate how much personal relationships, ideas, personalities, and presumed control affected the way our government was formed, and how we view the process as it took place.

Censorship of the Internet for Children Essay -- Computers Technology

Censorship of the Internet for Children The Internet is one of the most profound and important technological advancements of this era. It has touched the lives of hundreds of millions of people all over the world. The Internet has become so embedded into our everyday life that for many, life would almost be unbearable without an internet connection. The Internet has enabled so many people who are so far away from each other a means of communication. It eased the burden of contacting loved ones across the world from each other. Not only does the Internet provide a digital communication playground for users, it also provides them with a sea of invaluable resources. The wealth of information that is available on the Internet is both overwhelming and incredible. Almost everything imaginable to the human mind can be found on the Internet. Whether or not some of this information is legitimate, it still exists and is available to anyone who wants to access it. The Internet has empowered the individuals who are connected t o it with an abundance of resources and information. The Internet has brought about a new means of doing business. It seems that all business models today include the Internet some how. On the surface, the Internet may seem great, wonderful and ingenious however, the ability for everyone to access the Internet is both a blessing and also a curse. It is beautiful that the Internet and its contents are available to everyone, but that â€Å"everyone† includes children who are under the age of 18. The implications of this type of access are extremely problematic both socially and ethically. According to Internet World Stats, the estimated population of the world is about 6.45 billion people with approximately... ...itehouse.com/ â€Å"Whitehouse.com† [11] http://www.craiglist.com â€Å"Visit the Best in Adult Sites† [12] http://www.snapshotspy.com/stats.htm â€Å"Child Computer Usage Statistics† [13] http://www.utilitarianism.com/utilitarian.htm â€Å"Utilitarianism† [14] http://www.whitehouse.gov/news/releases/2003/10/20031025-1.html â€Å"Protection From Pornography Week, 2003†, President of the U.S, Oct. 25, 2003 [15] http://www.washingtonpost.com/wp-dyn/articles/A58610-2002Nov15.html â€Å"Congress Approves ‘Dot-Kids’ Measure†, David Maguire, Nov. 12, 2002 [16] http://www.kids.us/sitelist.html â€Å"Current Site List† [17] http://www.icra.org/ â€Å"Internet Content Rating Association† [18] http://www.icra.org/_en/about/ â€Å"ICRA At A Glance† [19] http://www.isc.meiji.ac.jp/~sumwel_h/links/linkJ04.htm â€Å"Laws of Japan† [20] http://www.ageofconsent.com/japan.htm â€Å"Age of Consent for Japan†

Volkswagen Polo Advertising

Volkswagen Polo advertisement Marco Mannoni Eric Sabatino Volkswagen, which means â€Å"people’s car†, is one of the most selling automotive companies in history. It has three cars in the top 10 list of best-selling cars of all time, the Volkswagen Golf, the Volkswagen Beetle and the Volkswagen Passat. The protagonist of the Volkswagen Polo advertisement is a student who is bullied by a group of â€Å"cool† guys. The situation changes when he gives a drive to one of the most beautiful girls of the school with his Polo.At the end of the advertisement the bullied guy will look more cool than the other guys thanks to a joke associated with the qualities of his car, the Volkswagen Polo. The purpose of the advertisement is to persuade young people that Volkswagen Polo is a young car and it’s made for them. As we can see in the advertisement there are only young people who act young, for example the joke that makes the advertisement funny is made only thanks to the qualities of the car and the behavior of the protagonist: if the car wasn’t powerful and the driver wasn’t driving hard, the joke couldn’t have been made.The advertisement is surely oriented towards a male audience. If we look at the ad we see that the actors are only students, probably university students. The joke that makes the ad funny matches with young people’s habits and behavior. This means that the target market for this advertisement is very small, it probably goes to a minimum of 18 years old (the age you can get the driving license) to a maximum of 23 years old (possibly your last year as a university student).This also means that the people who are the target maket probably don’t have any personal income and the car is supposed to be a present by their parents. The prototype of the target market for this ad is a middle-class 19 years old student who has just graduated from high school and deserves something very cool to start his n ew college experience in a positive way. The advertisement personality is particularly strong and it promises to the clients that they are going to buy one of the best young and also cool cars on the market.The product, a car in this case, is necessary for almost everyone in the world, but considering the target which the advertisement is addressed to, it is not strictly necessary. We’re not talking about a mobile phone or a high school degree, many young people use public transportations and go wherever and whenever they want with them. The advertisement wants to make its target market understand that Volkswagen Polo is not a vehicle, it is an experience.The stress on the feelings rather than on the technical qualities is supported with a very young advertisement which doesn’t focus on the car itself but instead focuses on who’s driving the car and how he looks and behave. The media used for this advertisement is internet. The only use of internet is justified by the content of the advertisement which could have been felt rude and controversial if aided on television. The fact that the ad is available only on the internet consents Volkswagen to look fashionable and trendy to its young clients and to don’t ruin the reliable image that it has with older people.

Bennett Explores the Fine Line Between Wisdom and Foolishness in ‘the History Boys’. Discuss with Reference to This Comedic Drama.

Bennett explores the fine line between wisdom and foolishness in ‘The History Boys’. Discuss with reference to this comedic drama. The fine line between wisdom and foolery has often been explored and blurred in dramatic comedies throughout the ages. Often, in Shakespeare’s plays especially, the fool figure turns out to be the wisest figure out of all of the other characters, and is used as a way to make a comment on the social context of the time.This theme is present in ‘The History Boys’, as Bennett mostly uses characters as a way of exploring the fine line. He also uses scenes and themes during the play to explore the fine line between wisdom and foolishness, but he tends to focus on using the characters to explore the line instead. The Headmaster is a character with whom, when first introduced to, the audience would appoint the title of ‘foolish’, as Bennett shows him to be a very foolish character.However, this would differ from Shak espeare’s fool; in his plays the fools were often the wisest of characters, but in this circumstance, with this character, the Headmaster acts foolish without becoming ‘the fool’ from Shakespeare, as the Headmaster doesn’t have the hidden wisdom and knowledge Shakespeare’s fools had. For instance, when discussing competing schools in the league tables with Mrs Lintott, he says ‘†¦Leighton Park. Or is than an open prison?No matter†¦Ã¢â‚¬â„¢ This quote shows the reader what a foolish man Bennett has created; a headmaster not knowing the difference between a competing school in the league tables and a prison is absurd. However, it helps Bennett to show the fine line between wisdom and foolery, as some members of the audience may think that the Headmaster is wise in some of the decisions he makes, as he does know methods to get the students to achieve academic levels that allow entry into Oxbridge.Another moment where Bennett explores th e fine line is when he says, upon discussing Oxbridge with the supply teacher Irwin, ‘I thought of going to, but this was the fifties. Change was in the air†¦Ã¢â‚¬â„¢ The first impression given of him from this line of speech is that the characters around him must be able to see through his lies and see the fool that he ultimately is; in the fifties, life was the same as in the forties; it was the sixties where ‘change was in the air’ and the characters around the Headmaster would know that he was ying to cover the fact that he wasn’t academically smart enough to attend Oxbridge. This does show him to hold some wisdom, however, as he was smart enough to cover up the fact that he didn’t attend Oxbridge, even if the lie wasn’t successful, and that he is wise as he does want the best for the boys, but again, this is outweighed by the foolish decision that is to get the boys to Oxbridge to raise the school in the league tables to ‘†¦enhance its reputation and thereby his own career†¦Ã¢â‚¬â„¢ showing he is mostly trying to get the boys do to well for his benefit.Bennett also uses the character of the Headmaster to make a social comment of the schooling at the time he wrote the play, hinting that headmasters of schools often tried to get the better grades for the students only to pull their school up in the league tables, and thereby improve their own reputations of headmasters. A second character Bennett uses to explore the fine line between wisdom and foolishness is Hector, one of the boy’s teachers.One of the first impressions we get of Hector is that he is a character who Bennett presents to be very wise; he has taught the boys so well they can quote literature at any time of the day in the correct context ‘†¦Posner (Edgar) ‘Look up, My Lord. ’ Timms (Kent) ‘Vex not his ghost†¦Ã¢â‚¬â„¢ This is quite a feat to achieve, and it also shows that he too knows and und erstands when and where to quote literature, again showing his wisdom.However, this is a point where Bennett does show how fine the line between wisdom and foolishness actually is, as some people may view this skill as useless, as it probably won’t be able to help them in their university or working life, unless they pursue a career where literature and the need to quote it is needed, so this act may be viewed as quite foolish; spending time teaching the boys something they probably won’t need in their future lives, despite the fact that they and Hector may be considered wise for having this skill.Bennett does show Hector to be a character who does act very foolish sometimes; ‘No Headmaster, (He covers his ears. )†¦Non. Absolument non. Non. Non. Non†¦Ã¢â‚¬â„¢. The stage directions used here make Hector act like a naughty child who is refusing to stop what they’re doing; a grown man, who is a teacher nonetheless, acting this way does appear to be a fool to people around him, even if they know he is only pretending. However, this is one of the moments where you can explicitly tell that Bennett is exploring the fine line etween wisdom and foolishness and is showing indeed how very fine it is; some people may see past Hector acting like a fool and see him to be very wise; he knows that if he carries on refusing to do what the Headmaster askes of him, the Headmaster may well just give up and drop the subject. This could be down to the fact that Hector doesn’t view the Headmaster as a wise man; more of a fool who you can walk over and expect to carry on doing things the way you want to, even if the Headmaster is against it. ‘A hand on a boy’s genitals at fifty miles an hour, and you call it nothing? This is a very important quote in showing how Bennett explores the fine line. Hector is a very wise man; he has a deep understanding and knowledge of literature, he has helped get the boys A-Levels up to the standa rds of Oxbridge and is, academically, quite smart. However, the quote shows that, in terms of his judgements, he is quite a fool; the acts he performed were frowned upon by society at the time, and show to many people that he has crossed the line between wisdom and foolishness with ease without really realising it. †¦transmission of knowledge†¦Ã¢â‚¬â„¢ This also shows how his judgements are foolish, and how he can be seen to be a fool by many people; when he is confronted about his actions, he uses quotes from poetry to try to get out of the confrontation. By the end of the play, many people would probably see Hector as a very wise man, but a man who has the tendency to cross the fine line between wisdom and foolishness, whilst others would see him as only being a fool, despite his knowledge in literature.Overall, Hector is probably Bennett’s main way to explore the fine line between wisdom and foolishness, as Hector crosses the line countless times without realisin g it himself. Another way Bennett explores the fine line between wisdom and foolishness is by using scenes, such as the French Scene. This scene takes place towards the start of the play, and is where Hector and the boys practise speaking fluent French by acting out a scene of their choice in French. Mais une maison de passe ou tous les clients utilisent le subjonctif ou le conditionnel, oui? ’ (But a brothel where all clients use the subjunctive or conditional, yes? ) This quote is taken from the scene and helps to show the wise and the foolish sides of Hector; he and the students are acting out a scene in fluent French (which in itself is a very academic skill for the students to have learnt) and Hector is quite wise in getting them to practise using their French in everyday scenes, thus improving their fluency.However, the foolish part is the fact that the scene they are all acting out is a brothel, which is a very foolish thing to do considering where they are (in a schoo l), but the fact that Hector keeps on going on about their grammar whilst speaking French does show some wisdom, with the fact that he knows exactly how to get the boys to improve their fluency and grammatical skill in French, but in a very foolish circumstance. A third way the fine line between wisdom and foolishness is through themes; specifically the themes of sexuality and sex.For sexuality; ‘†¦Don’t touch him†¦Ã¢â‚¬â„¢ This quote is quite important in showing the fine line between wisdom and foolishness, as it is said when Hector and Irwin are discussing Hector’s early retirement, teaching and Dakin. Bennett shows here that Hector’s foolish decisions have turned him into a wiser man, who is advising Irwin on how not to make the same foolish mistake he did. The foolishness here makes the scene quite tragic rather than comic. For the theme of sex, the fine line is explored when Dakin and Scripps have a conversation together about Fiona (the He admaster’s secretary). †¦like particularly her tits, which only fell after a prolonged campaign some three weeks ago†¦Ã¢â‚¬â„¢ The wordplay in this conversation is very foolish indeed, which Scripps finds funny albeit embarrassing, but the wisdom in Dakin is evident by the way Dakin applies military logistics to a new context with ease, using the semantic field of war. Overall, these are the main ways Bennett uses to explore the fine line between wisdom and foolishness in ‘The History Boys’, mainly using the characters of the Headmaster and Hector.