Our Town Essays - Our Town, Emily Webb, Pretty Little Liars

Our Town Our Town, by Thornton Wilder is a play that takes place in a small fictional town of Grover's Corner, New Hampshire; beginning in 1901 and ending in 1913. The play takes the audience through the cycles of life, with the purpose of getting a universal message stating that life shouldn't be taken for granted. Emily Webb, one of the most important characters in the play, is Wilder's character in which he uses to show the audience a universal message that anyone would understand and relate to. Emily is a character that is normal enough so that the audience could relate to her; and yet be different in little ways that makes people love and adore her. For example, Emily went through the most common events in a woman's life: marriage, childbirth, and death in the play. These cycles makes her common, thus relatable to the audience. Without going through common events in life, the character would seem distant and likeable to the audience. Similarly, when Emily said that she expects a man to be perfect, it makes her special. Wilder put in that scene because he believed that even though there is a basic image of an average person, to be truly average, the character must have a difference to separate the character from the crowd. If the character doesn't have any differences, then the character would be faceless; impossible for the character to take a major role in the play. Emily is portrayed uniquely in her own way, and yet is still within the boundaries of everyone else. The character Emily plays a crucial scene in the play, the part where Emily went back to her twelfth birthday. At first, Emily wanted to go back and relive the happiest day of her life, but Mrs. Gibbs stopped her and told her to visit a normal day instead. Mrs. Gibbs knew what would happen to Emily if she had relived a joyful day in her life. If Emily had went back to a special occasion, she would've been overwhelmed by the all the beauty that she didn't pay attention to. Therefore, Emily went to relive her twelfth birthday, but wasn't as happy as she thought she would have been. Emily couldn't understand why her own mother wouldn't even spare the time to look at her on her birthday. She then concluded that the living is ignorant and doesn't appreciate the small things that are in their lives every day. The character Emily is perfect just the way she is. If Wilder changed Emily, the universal message might not be as effective as it is now. Meaning that the audience wouldn't like the idea given from a character that is unlike them.

Pros and Cons of Hydrogen Fuel-Cell Vehicles

Pros and Cons of Hydrogen Fuel-Cell Vehicles The jury is still out on whether hydrogen will ultimately be our environmental savior, replacing the fossil fuels responsible for global warming and various nagging forms of pollution. Two main hurdles stand in the way of mass production and widespread consumer adoption of hydrogen â€Å"fuel-cell† vehicles: the still high cost of producing fuel cells; and the lack of a hydrogen refueling network. The High Cost of Building Hydrogen Fuel-Cell Vehicles Reining in manufacturing costs of fuel-cell vehicles is the first major issue the automakers are addressing. Several had  fuel-cell prototype vehicles on the road, sometimes even leasing them to the public, but they were spending upwards of $1 million to produce each one due to the advanced technology involved and low production runs. Toyota reduced its costs per fuel-cell vehicle and as of 2015 sells its Mirai model for close to $60,000 in the United States. The Honda FCX Clarity is available only in southern California. Other manufacturers have been investing in developing mass-market models as well.   Still Too Few Places to Refuel Another problem is the lack of hydrogen refueling stations. Major oil companies have been loathe to set up hydrogen tanks at existing gas stations for many reasons, ranging from safety to cost to lack of demand. But obviously the oil companies are also trying to keep customers interested in their highly profitable bread-and-butter product: gasoline. A more likely scenario is what is emerging in California, where a few dozen  independent hydrogen fuel stations are located around the state as part of a network created by the nonprofit California Fuel Cell Partnership, a consortium of automakers, state and federal agencies, and other parties interested in furthering hydrogen fuel-cell technologies. The Benefits of Hydrogen Over Fossil Fuels The benefits of ditching fossil fuels for hydrogen are many, of course. Burning fossil fuels like coal, natural gas and oil to heat and cool our buildings and run our vehicles takes a heavy toll on the environment, contributing significantly to both local problems such as elevated particulate levels and global ones such as a warming climate. The only by-product of running a hydrogen-powered fuel cell is oxygen and a trickle of water, neither of which will cause any harm to human health or the environment. Hydrogen Is Still Closely Tied to Fossil Fuels But right now, a large percentage of the hydrogen available in the United States is either extracted from fossil fuels or made using electrolytic processes powered by fossil fuels, thus negating any real emissions savings or reduction in fossil-fuel usage. Only if renewable energy sources- solar, wind, and others- can be harnessed to provide the energy to process hydrogen fuel can the dream of a truly clean hydrogen fuel be realized. Renewable Energy the Key to Clean Hydrogen Fuel Stanford University researchers in 2005 assessed the environmental effects of three different hydrogen sources: coal, natural gas, and water electrolysis powered by wind. They concluded that we would lower greenhouse gas emissions more by driving gasoline/electric hybrid cars than by driving fuel-cell cars run on hydrogen from coal. Hydrogen made using natural gas would fare a little bit better in terms of pollution output, while making it from wind power would be a slam-dunk for the environment.

50 Words with Alternative Spellings

50 Words with Alternative Spellings 50 Words with Alternative Spellings 50 Words with Alternative Spellings By Mark Nichol What is one to do when one finds a choice of spellings in the dictionary? Most dictionaries specify the preferred variant when two or more spellings of a word are listed, but others aren’t so clear. According to Merriam-Webster’s website, the former spelling is more common than the latter for the following words and is the preferred alternative: 1. acknowledgment / acknowledgement 2. adapter / adaptor 3. adviser / advisor (but advisory) 4. aeon / eon 5. ambience / ambiance 6. amok / amuck 7. appall / appal 8. around / round 9. ax / axe 10. caliber / calibre 11. counselor / counsellor 12. doughnut / donut 13. enclose / inclose 14. enroll / enrol 15. furor / furore 16. glamour / glamor 17. gray / grey 18. impostor / imposter 19. ingrain / engrain 20. inquire / enquire 21. judgment / judgement 22. lambaste / lambast 23. likable / likeable 24. linchpin / lynchpin 25. meager / meagre 26. mollusk / mollusc 27. movable / moveable 28. ocher / ochre 29. omelet / omelette 30. opossum / possum (but playing possum) 31. pincer / pinchers 32. pixilated / pixillated (distinct from pixelated) 33. pompon / pom-pom 34. racket / racquet (but racquetball) 35. sherbet / sherbert 36. somber / somber 37. specter / spectre 38. sulfur / sulphur 39. T-shirt / tee shirt 40. theater / theatre 41. till / ’til or til 42. timbre / timber 43. vial / phial 44. woolen / woollen 45. woolly / wooly 46. yogurt / yoghurt Discussion of distinctions in alternative spellings of some other words follows: 47. Bologna is the name of the meat product; baloney is a quaint slang synonym for nonsense. 48. Lasagne is an alternate spelling for the pasta usually referred to as lasagna; the latter spelling predominates for the name of the baked dish. 49. Mic and mike are both acceptable as short versions of microphone. 50. Savannah is spelled as such only as the name of the city in Georgia or the name of a hybrid of the serval, an African cat, and the domestic cat; otherwise, it’s spelled savanna. This list omits spelling variations that are primarily distinct in usage in American English versus British English (though some, such as gray/grey and specter/spectre, are also variations divided by an ocean). See this discussion on that topic with a list of categories of spelling differences. (But it’s a stick and tricky matter, so check out the comments for input from site visitors as well.) Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the General category, check our popular posts, or choose a related post below:45 Synonyms for â€Å"Food†Writing the CenturyPhrasal Verbs and Phrasal Nouns

Aristotle's model of communication Essay Example | Topics and Well Written Essays - 750 words

Aristotle's model of communication - Essay Example This research will begin with the statement that Aristotle introduced his communication model in 300BC. The model focuses  the issues of public speaking and advice speakers to create speech for  various  listeners on a different occasion at different times. The orator plays a significant role in the public speaking, and he or she must organize the dialogue. The presenter should manipulate the audience and persuades them. Aristotle puts the narrator in the middle of the communication process. The communication message should have an effect on the audience; thus, it should affect the receiver. The presenter takes absolute charge in the communication; thus, the he or she should prepare points in a way that can persuade the listener. He or she should be aware of the targeted listeners before preparing the speech. For instance, the care provider should understand the needs of patients before making the dialogue. This is essential because it will enable him or her to meet the demandi ng needs of patients. Thus, the speech should address the setbacks of listeners and provide valuable solutions to the setbacks. The current communication theorists are built on Aristotle‘s model because this model is broadly accepted. Aristotle’s model plays significant roles in guiding many communication researchers. The recent developments in the communication field have led to increased interest in sharing the common characteristics. Thus, many communication theorists share some aspects from the model of Aristotle.... Therefore, many recent communication theorists rely on the model of Aristotle in explaining about their development of communication models. Communication barriers generate obstacles to valuable communication; thus contributing to misinterpretations that may lead to disagreements. Varied barriers to effectual communication exist in many organizations. First, noise is among the obstacles to effectual communication. It is not easy for one to pass the message to the audience in a noisy atmosphere. The message may appear meaningless, and the recipient or listener may understand it in a different way. Secondly, unorganized thought is influential to unsuccessful communication. Another obstacle is poor knowledge about the receiver and this may hinder effective communication. The information may be deemed unsuccessful in case the correspondent does not comprehend the recipient. This may lead to misinterpretations of information; thus results to poor conveyance of the message. Dissimilar cult ural levels may lead to obstacles for valuable communication. This is because diverse organizations have their own cultural ways of thinking or understanding. This may lead to unsuccessful communication in case the dispatcher does not comprehend them. Lastly, poor connection with the listener may hamper successful communication. A superior speaker should engage the listen in communication because avoiding the audience may lead to communication barriers. Communication styles in many organizations have dramatically changed because of poor organizational management and lack of effective communication skills. Bradshaw and Lowenstein (2011) argue that making effective communication in the

College Admission Essay Example | Topics and Well Written Essays - 500 words

College Admission - Essay Example In addition to Spanish, I would also like to learn languages such as German, French, Italian, Japanese, and Arabic. The reason why I am so interested in furthering my education at the Saint Louis University-Madrid Campus is that I plan to become a fully-licensed nurse practitioner in the future. My hard work ethic will hopefully help me to achieve my career goals; I have been working since I was 14. Currently, I am studying in conjunction with working as a bartender for almost 60 hours per week. Aside from this, I help an autistic child in the mornings. The reason why I feel so compelled to do this is that I love to help people of all ages and backgrounds; I am considering joining the Peace Corps. My hobbies include hiking, caving, and exploring. I do not feel in awe of new challenges because I see them as exciting and a chance for me to prove myself. I work best under pressure because I get a thrill of being able to overcome any obstacles that fall my way. I consider that learning is a life-long process, and is one that should not be taken lightly. There is never a time in our lives where we can claim to know it all. I prefer to be humble and open to anything that may improve my understanding about the world. My experiences with other cultures can help me to better understand how other groups of people think and

Organic Foods Pdf Essay Example for Free

Organic Foods Pdf Essay Abstract: During the last decade, consumers’ trust in food quality has decreased drastically, mainly because of growing ecological awareness and several food scandals (e. g. BSE, dioxins, bacterial contamination). It has been found that intensive conventional agriculture can introduce contaminants into the food chain. Consumers have started to look for safer and better controlled foods produced in more environmentally friendly, authentic and local systems. Organically produced foods are widely believed to satisfy the above demands, leading to lower environmental impacts and higher nutritive values. So far, studies have partly con? rmed this opinion. Organic crops contain fewer nitrates, nitrites and pesticide residues but, as a rule, more dry matter, vitamin C, phenolic compounds, essential amino acids and total sugars than conventional crops. Organic crops also contain statistically more mineral compounds and usually have better sensory and long-term storage qualities. However, there are also some negatives: plants cultivated in organic systems generally have 20% lower yields than conventionally produced crops. Several important problems need to be addressed in the coming years: environmental, bacterial and fungal contamination of organic crops and, the most essential issue, the impact of organic food consumption on animal and human health.  © 2007 Society of Chemical Industry Keywords: organic plant crops; quality; yield; composition; nutrition; vitamins; phenolics; sugars; nitrates; nitrites; pesticides; dry matter; health; sensory qualities. FACTORS INFLUENCING THE QUALITY OF ORGANIC PLANT FOOD PRODUCTS There are several important factors in?uencing the quality of food products that also are relevant to organically produced plant products. As illustrated in Fig. 1, the basic factors are the quality of the environment (abiotic factors) and the levels of pest and pathogen damage (biotic factors) to which plants are subjected. The main components of the environment (air, water, soil) have to be unpolluted if the crops obtained are expected to be of high nutritive quality. Many environmental contaminants enter the food production chain (soil–plant–animal–human organism), causing signi? cant problems in human health. 1 These contaminants include heavy metals, pesticide residues, nitrogen compounds, mycotoxins, chlorinated biphenyls (PCBs), aromatic hydrocarbons (e. g. benzo[a]pyrene), plant growth stimulators (e. g. choline chloride), antibiotics, hormones, radioactive isotopes and plastic substances (monomers). Climate and weather are also important factors, as well as soil type and pH, soil cultivation, fertilisation and conditions of crop storage after harvest. ? Biotic factors can have also a signi? cant impact on crop quality. The main biotic factors are cultivar choice, bacterial and fungal contamination (disease) and pest damage. Cultivars of the same crop species can differ signi? cantly in nutritive quality. For example, the content of ? carotene in carrots (Daucus carota L. ) can vary between 7. 19 and 13. 84 mg g? 1 depending on the cultivar. 2 The main potential source of bacterial contamination in plant crops is animal manure used in organic farming. Contamination can take place via the roots or by water splashing onto the leaf surfaces. The most important organisms are several species of facultative anaerobic bacteria (Salmonella enterica, Escherichia coli O157:H7, Campylobacter spp., Listeria monocytogenes, Clostridium botulinum, Mycobacterium paratuberculosis), protozoa (Toxoplasma gondii), tapeworms, viruses and prions. The results obtained so far are contradictory. Some studies indicate higher bacterial contamination in organic crops, while others show the opposite. 3 Mycotoxins (produced by fungi) originate mostly in the ? eld but can also develop during storage. Owing to the fact that fungicides are not used Correspondence to: Ewa Rembialkowska, Organic Foodstuffs Division, Faculty of Human Nutrition and Consumer Sciences, Warsaw Agricultural University, Nowoursynowska 159 C, PL-02-776 Warszawa, Poland E-mail: ewa [emailprotected] pl (Received 24 October 2006; revised version received 29 January 2007; accepted 8 February 2007). Figure 1. Factors in? uencing the quality of organic food products. in organic agriculture, some authors believe that organically produced foods will contain higher concentrations of mycotoxins. However, literature reviews show that mycotoxin concentrations are usually similar or reduced in organic compared with conventional products. 4 The most notorious mycotoxins are those produced by Fusarium species on cereal crops and maize. One of the reasons for lower Fusarium infections in organic grains could be the lower nitrogen concentrations in the tissues. 5 Insect pests also exert an in? uence on crop quality. Because of the ban on synthetic pesticides in organic agriculture, insects often damage fruits and vegetables, thereby diminishing their yield and harming their appearance. However, it is not clear whether they also reduce their nutritive quality. In contrast, there is evidence that organically grown plants contain more phytochemicals (which are natural insecticides) and are therefore more resistant to insect damage. 6 They can also play a positive role in human health, because several phytochemicals, being plant defence compounds, are connected with possible health bene? ts (Brandt K, oral presentation at QLIF Congress, Newcastle, 2005). Regulations on organic plant production allow actions that avoid many negative features of crop quality if they are consistently performed by producers. In order to ful? l these demands and to offer highquality products to consumers, an ef? cient and airtight certi? cation and control system must be implemented. In most countries such systems are quite ef?cient, though a rapid increase in the number of organic farms could lead to problems with a subsequent loosening of regulatory control. Therefore the main rule should be ‘trust is good, but control is better’. Moreover, the ? nal quality of organic food products is in? uenced by the effective implementation of 2758 the regulations on animal production and organic food processing. Only precise ful? lment of all these regulations can guarantee the best organic food quality (Fig. 1). IMPACT OF REGULATION ON ORGANIC PLANT PRODUCTION The regulations for organic plant production are clear and detailed. 7 The European Union (EU) regulation published in 19918 contains parts that relate directly to the composition of organic plant products. The most important aspects of this regulation include:7 †¢ a ban on genetic engineering and genetically modi? ed organisms (GMOs); †¢ lower nitrogen levels – a maximum limit for manure application of 170 kg N ha? 1 year? 1 ; †¢ a ban on synthetic pesticides; †¢ a ban on synthetic mineral fertilisers; †¢ a ban on growth promoters. Organic farmers must follow the above regulations if they want to pass the inspection procedure every year and receive a certi? cation document. If all requirements are complied with, several qualitative results can be expected. The most important conclusions from scienti? c comparisons are given below. CONTAMINANTS Nitrates and nitrites A large amount of data shows that the content of nitrates and nitrites is distinctly higher in conventionally cultivated than in organic crops. This is important, because nitrates can easily be converted into nitrites, which can cause a dangerous illness called methaemoglobinaemia in babies, infants and elderly people. 9 J Sci Food Agric 87:2757–2762 (2007) DOI: 10. 1002/jsfa Quality of organic plant products. Moreover, nitrites can react with amines to create nitrosamines, which are carcinogenic and mutagenic substances causing cancer of the digestive tract and leukaemia. 10 This process is dangerous not only for young children but also for adults of any age. Based on a large amount of data, the nitrate content of organic and conventional crops has been compared. On average, the nitrate content of organic crops was 49% that of conventional crops. 11 These and other data provide a basis for stating that organic methods lead to an approximately 50% reduction in the intake of nitrates and nitrites by humans. Pesticides Governments place legal limits, known as the Maximum Residue Level (MRL), on the level of pesticides that can be present in food. The MRL is usually estimated by testing individual pesticides on rats. Governments maintain that consumption of pesticides below the MRL is not a health risk. However, at lower levels, pesticides are known or suspected to cause many diseases and health problems, including cancer. 12 The main problem is that the MRL for pesticides is usually estimated by testing individual pesticides on rats for a relatively short period. Virtually nothing is known about the effects of consuming combinations of potentially hundreds of different pesticides over the course of a lifetime. We do not and cannot know explicitly what is causing what, so precaution is the main tool available to us (Howard V, oral presentation at QLIF Congress, Newcastle, 2005). The levels of pesticide residues found in organic crops are de? nitely lower than those present in conventional crops (Howard V, oral presentation at QLIF Congress, Newcastle, 2005). It can be expected that eating organic foods will result in lower pesticide levels in human milk and body tissues. There is some evidence con? rming this hypothesis. Researchers in France found that the level of pesticide residues in the milk of breast-feeding women decreased signi? cantly with an increase in the proportion of organic food in the daily diet (from 25 to 80%). 13 All available results show that the content of pesticide residues is signi? cantly lower in organic crops, which creates safer health conditions for consumers eating organically. Heavy metals Heavy metals such as cadmium, lead, arsenic, mercury and zinc are introduced into the food chain from various sources, including industry, transportation, communal wastes and agriculture. For example, mineral phosphoric fertilisers used in conventional agriculture can introduce cadmium into crops, but the metal industry and transportation also cause cadmium contamination of soils and crops. Therefore there are no clear results in studies comparing the levels of J Sci Food Agric 87:2757–2762 (2007) DOI: 10. 1002/jsfa heavy metals in organic and conventional crops. Some data point to higher levels in conventional crops, while others show the opposite. 11 A problem to be solved is whether organic farming (composting, increasing the organic matter in soil, pH, etc. ) can diminish the intake of heavy metals by cultivated plants. DESIRABLE COMPOUNDS IN PLANTS Vitamins, phenolic compounds and mineral compounds The nutritive value of foods depends mainly on them having the appropriate content of compounds indispensable for proper functioning of the human organism. The content of phyto-compounds in plant foods is a topic of great interest in food science nowadays. A growing body of evidence indicates that secondary plant metabolites (phytochemicals) play a critical role in human health and may be nutritionally important. 14 There are two main theories explaining the factors in? uencing the levels of compounds in plants. 15 The carbon/nitrogen (C/N) balance theory states that, when nitrogen is easily available, the plant will ? rst make compounds with high nitrogen content, e. g. proteins for growth and nitrogen-containing secondary metabolites such as alkaloids, glucosinolates and non-protein amino acids such as the Allium ? avour precursors. When nitrogen availability is limiting for growth, the metabolism changes more towards carboncontaining compounds, e. g. starch, cellulose and non-nitrogen-containing secondary metabolites such as phenolics and terpenoids. The second, newer theory is the growth/ differentiation balance hypothesis (GDBH). 15 It states that the plant will always assess the resources available to it and optimise its investment in processes directed towards growth or differentiation. The term ‘differentiation’ encompasseses increased formation of defence compounds as well as accelerated maturation and seed development. The C/N balance theory is a special and typical case of the GBDH theory, since low nitrogen availability is the most common growth-limiting condition in natural ecosystems. 15 To verify the above theories, several authors investigated the content of some vitamins and phyto-compounds in organically and conventionally produced crops. In order to summarise different data, for each organic–conventional comparison a % difference was calculated: [(organic ? conventional)/conventional] ? 100 The collected data for several desirable components are presented in Table 1. The role of vitamin C (ascorbic acid) in the human organism is basic for several metabolic functions, mainly because it is one of the major cellular direct antioxidants (along with glutathione) and is a 2759 E Rembialkowska Table 1. Contents of desirable components in organic crops relative to those in conventional crops Component Vitamin C Phenolic compounds Iron Magnesium Phosphorus Mean % difference +28. 7 +119. 3 +21. 1 +29. 3 +13. 6 Range (%) ? 38 to +135. 5 ? 56. 6 to +734. 2 ? 73 to +240 ? 35 to +1206 ? 44 to +240 Number of studies 21 15 16 17 18 production and reduces carbohydrate production. Moreover, the increased protein produced in response to high nitrogen levels contains lower amounts of certain essential amino acids such as lysine and therefore has a lower quality with respect to human nutrition. Source: Ref. 17 and author’s own calculations. cofactor for certain enzymes. Vitamin C also supports detoxication and resistance of the human organism. The higher content of vitamin C in organic crops is bene? cial to health, because vitamin C inhibits the in situ formation of carcinogenic nitrosamines, thus diminishing the negative impact of nitrates on the human organism. 10 Therefore organic vegetables can play an important anticarcinogenic role. Plant-based phenolic metabolites are particularly interesting because of their potential antioxidant activity and medical properties, including anticarcinogenic activity. 15 According to Benbrook,16 organic farming has elevated antioxidant levels in about 85% of the cases studied to date and, on average, levels are about 30% higher compared with foods grown conventionally. Mineral compounds containing iron, magnesium and phosphorus are fundamental for human health. According to Worthington,17 the higher mineral content in organic crops may be connected with the higher abundance of micro-organisms in organically managed soil. These micro-organisms produce many compounds that help plants to combine with soil minerals and make them more available to plant roots. Unfortunately, there have been only a few studies on other vitamins such as ? -carotene, B1 and B2 and the results are contradictory. Therefore no general conclusions can be drawn about these compounds. Total sugars A higher total sugar content in plant crops not only improves their taste but is also an important component of their technological quality, e. g. in the case of sugar beet. Studies clearly indicate a higher content of total sugars, mainly sucrose, in organically produced vegetables and fruits such as carrots, sugar beet, red beetroot, potatoes, spinach, Savoy cabbage, cherries, redcurrants and apples. 11,18 Proteins Several studies analysed in review papers11 show that the quantity of crude protein is lower in organic than in conventional crops but that the quality is better as measured by essential amino acid content. According to Worthington,17 nitrogen from any kind of fertiliser affects the quantity and quality of protein produced by plants. Provision of a large amount of nitrogen to a plant increases protein 2760 SENSORY QUALITY OF ORGANIC FOODS Many studies have proved quite unequivocally that vegetables and fruits from organic farms have a better taste and smell. This was found for carrots and potatoes, celery and red beetroot, head cabbage and tomatoes as well as for apples, cherries and redcurrants. 11 Organic fruits contained more total sugars, which probably in?uenced the better taste perception by consumers. Better taste and smell have also been found for bread made from organic grain, which also had better crumb elasticity. 6 Interesting studies have been conducted on animal food preference in which animals were given organic or conventional fodder. Most studies have proved a clear animal preference for foods produced organically; such studies have been conducted on rats, mice, hens and rabbits. 19 Preference for organic fodder was also observed in cases where, according to chemical analyses, both organic and conventional fodder ful? lled all physiological needs of the animals tested. 20 The reason for this was probably the difference in taste between organic and conventional fodder. STORAGE QUALITY OF ORGANIC PLANT CROPS Transpiration losses and decay processes, as well as changes in nutritive value, normally take place during the storage period of potatoes and other vegetables. However, these changes can proceed at different rates and to differing degrees. Most of the available data indicate that the decay process is slower in organic crops, which therefore show better storage quality after the winter period. A review study based on many sources21 concluded that the storage quality of vegetables and fruits was better in the case of plants grown on organic farms (Table 2). The better storage quality of organic crops Table 2. Storage losses of carrots, potatoes and various fruits and vegetables from organic (ORG) and conventional (CONV) farmsa Carrots Potatoes Fruits and vegetables ORG CONV ORG CONV ORG CONV Number of quoted studies Storage loss (% of initial mass) a 15 33 15 40 22 22 22 30 53 28 53 38 Average data based on literature review. 21 J Sci Food Agric 87:2757–2762 (2007) DOI: 10. 1002/jsfa Quality of organic plant products Table 3. Positive nutritive attributes of organic plant products No. 1 2 3 4 5 Attribute Organic crops contain fewer nitrates, nitrites and pesticide residues than conventional crops. There is no clear difference in the content of heavy metals between organic and conventional crops Organic plant products contain, as a rule, more dry matter, vitamin C, phenolic compounds, essential amino acids and total sugars. However, the level of ? -carotene is often higher in conventional plant products Organic plant products contain statistically more iron, magnesium and phosphorus. They also tend to contain more chromium, iodine, molybdenum, selenium, calcium, boron, manganese, copper, potassium, sodium, vanadium and zinc Organic plant products usually have better sensory quality. They have a clearer smell and taste and are sweeter and more compact because of their higher dry matter content Preference for organic products is typical not only for humans but also for animals such as rats, rabbits and hens. This preference was also observed in cases where, according to chemical analyses, both organic and conventional fodder ful? lled all physiological needs of the animals tested Vegetables and fruits from organic production maintain better quality during winter storage, showing lower mass losses due to transpiration, decay and decomposition processes. A possible reason for this is their higher content of dry matter, minerals, sugars and other bioactive compounds 6 Table 4. Negative and unclear aspects of organic plant products No. 1 Negative aspect Plants cultivated in organic systems have, as a rule, signi?cantly (on average 20%) lower yields than conventionally produced crops. This increases their price and creates for many consumers a barrier to buying organic foods Unclear aspect Environmental contamination (heavy metals, PCBs, dioxins, aromatic hydrocarbons) can be similar in organic and conventional crops, because the impact of industrial, transport and communal sources is similar on organic and conventional farms located in the same area Bacterial (mainly Salmonella and Campylobacter) Contamination can sometimes be higher in organic produce, but scienti?c evidence of this is still not clear Mycotoxins can contaminate both organic and conventional foods, but scienti? c data are contradictory The impact of organic food consumption on human health and wellbeing remains essentially unknown in spite of some positive indications, so the subject needs further study 2 3 4 was probably associated with a higher content of dry matter in their ? esh, resulting in less extensive decay and decomposition. Lower losses in organic production have not only nutritive but also economic bene? ts. In conventional systems, high yields are produced but signi?cant losses during storage reduce the economic bene? ts. CONCLUSIONS Recent food crises (BSE, foot and mouth disease, food contamination by dioxins, toxic fungi, Salmonella and Campylobacter bacteria) have caused consumers to look for more authentic and safer foods. Organic food production is widely recognised as being more friendly to the environment, more controlled and better for animal welfare. On the other hand, many data indicate that a lot of food contaminants have their source in conventional methods of agriculture, animal production and food processing. The negative effect of the continuing enthusiastic use of chemical fertilisers and pesticides in agriculture is potentially huge. Therefore safer methods of agricultural production, mostly organic methods, are very important. Studies conducted in various countries have indicated several positive attributes of organic plant J Sci Food Agric 87:2757–2762 (2007) DOI: 10. 1002/jsfa products (Table 3) but also a few negative and unclear aspects (Table 4). To summarise the positives, organic food should be recommended for all, but especially for young babies, pregnant and breast-feeding women, elderly and chronically ill people and vegetarians. The last group obviously consumes a lot of vegetables, which can contain too high levels of carcinogenic substances when produced conventionally. The lower content of nitrates and higher content of phenolic compounds and vitamin C in organic crops are especially important for health. Nitrates are easily converted in the digestive tract into poisonous nitrites, which are the precursors of carcinogenic nitrosamines. This process is hampered by vitamin C, and carcinogenesis is retarded by phenolic compounds and other dietary phytochemicals present at higher levels in organically produced crops. Therefore organic vegetables can play an important anticarcinogenic role. REFERENCES 1 Rembialkowska E, Organic agriculture and food quality, in Ecological Agriculture and Rural Development in Central and Eastern European Countries, Vol. 44 of NATO Science Series, ed. by Filho WL. IOS Press, Amsterdam, pp. 185–204 (2004). 2761 E Rembialkowska ? ? 2 Schuphan W, Biochemische Sortenprufung an Gartenmohren ? ? als neuzeitliche Grundlage fur planvolle Zuchtungsarbeit. Z? chter 2:25–43 (1942). U 3 Franz E, van Bruggen AHC and Semenov AM, Risk-analysis of human pathogen spread in the vegetable industry: a comparison between organic and conventional production chains, in Bayesian Statistics and Quality Modelling in the AgroFood Production Chain, ed. by van Boekel MAJS, Stein A and van Bruggen AHC. Kluwer Academic, Dordrecht, pp. 81–94 (2004). 4 FAO, Food Safety as Affected by Organic Farming (Twentysecond FAO Regional Conference for Europe). [Online]. (2000). Available: www. fao. org/docrep/meeting/x4983. htm. 5 Van Bruggen AHC and Termorshuizen AJ, Integrated approaches to root disease management in organic farming systems. Aust Plant Pathol 32:141–156 (2003). 6 Bjorn G and Fruekilde AM, Cepa onions (Allium cepa L) grown conventionally and organically – similarities and differences. Gron Viden 153:1–6 (2003). (in Danish). 7 Hansen B, Alroe HF, Kristensen ES and Wier M, Assessment of food safety in organic farming. DARCOF Working Paper 52 (2002). 8 EU, Council Regulation No. 2092/91 of 24 June 1991 on organic production of agricultural products and indications referring thereto on agricultural products and foodstuffs. OJL 198, 22. 7 P. 1 (1991). ? 9 Szponar L and Kierzkowska E, Azotany i azotyny w srodowisku oraz ich wplyw na zdrowie czlowieka. Post Hig Med Do? w s 44:327–350 (1990). 10 Mirvish SS, Vitamin C inhibition of N-nitroso compounds formation. Am J Clin Nutr 57:598–599 (1993). 11 Rembialkowska E, Wholesomeness and Sensory Quality of Potatoes and Selected Vegetables from the Organic Farms. Fundacja ? Rozwoj SGGW, Warszawa (2000). 12 BMA, The BMA Guide to Pesticides, Chemicals and Health. Report of Science and Education. British Medical Association, London (1992). 13 Aubert C, Pollution du lait maternel, une enquete de terre vivante. Quatre Saisons Jardinage 42:33–39 (1987). 14 Lundeg? rdh B and M?rtensson A, Organically produced plant a a foods – evidence of health bene? ts. Acta Agric Scand B 53:3–15 (2003). 15 Brandt K and Molgaard JP, Organic agriculture: does it enhance or reduce the nutritional value of plant foods? J Sci Food Agric 81:924–931 (2001). 16 Benbrook CM, Elevating Antioxidant Levels in Food through Organic Farming and Food Processing. An Organic Center of Science Review. Organic Center for Education and Promotion (2005). 17 Worthington V, Nutritional quality of organic versus conventional fruits, vegetables, and grains. J Alternative Compl Med 7:161–173 (2001). 18 Zadoks JC, Development of Farming Systems. Pudoc, Wageningen (1989). 19 Williams CM, Nutritional quality of organic food: shades of grey or shades of green? Proc Nutr Soc 61:19–24 (2002). ? 20 Woese K, Lange D, Boess Ch and Bogl KW, A comparison of organically and conventionally grown foods – results of a review of the relevant literature. J Sci Food Agric 74:281–293 (1997). 21 Bulling W, Qualit? tsvergleich von ‘biologisch’ und ‘konventionell’ a erzeugten Feldfruchten. Regierungsprasidium, Stuttgart (1987). 2762 J Sci Food Agric 87:2757–2762 (2007) DOI: 10. 1002/jsfa.

The Death Of The Virgin :: essays research papers

Death of the Virgin   Ã‚  Ã‚  Ã‚  Ã‚  Michelangelo Merisi was born in Caravaggio, Italy in 1573. He grew up to be known by the name of his birthplace, Caravaggio, and as an artist. He was probably the most revolutionary artist of his time, breaking the rules of previous artists. Carvaggio had spent his childhood in the presence of art, living with a painter for four years before moving to Rome to work as an assistant to other painters. In about 1595, he began to sell his paintings through a dealer, who brought him to the attention of the Cardinal. At the age of 24, he was called upon by the Cardinal Francesco del Monte to paint for a church. He was criticized a lot for the realistic and dramatic nature of his works. Despite the criticism, he was a recognized, and eventually envied painter. While in Rome, he was imprisoned for several assaults. He fled the city and eventually ended up in Naples in about 1607. Here, he painted for a while. During this period, his paintings were dark and urgent, reflecting his feelings at the time. He left and continued to stay undercover for two more years before being arrested and dying not long thereafter. During this period, however, his paintings were among the best of his career. Caravaggio’s Death of the Virgin was painted in 1605-1606, in France, probably on his run to Naples.   Ã‚  Ã‚  Ã‚  Ã‚  The Death of the Virgin requires some background information to fully understand the meaning of the painting. The Virgin Mary, the mother of Jesus Christ has a special place of devotion especially in the Roman Catholic and Eastern Orthodox churches and is considered a historical work, to these and other religions. Caravaggio was not influenced much by other painters. He was making up his own style of painting. A critic of the age, Giovanni Pietro Bellori wrote: â€Å"Caravaggio deserves great praise, as he was the only one who attempted to imitate the nature as opposed to the general trend in which painters imitated other painters.† Another critic said that he had â€Å"abandoned beauty and was interested in depicting reality.† While one may suspect that other artists of the age would have avoided this new realism, many actually borrowed it unconsciously. This particular painting was refused as an altarpiece for Santa Maria della Scala in Rome becaus e of the way the Virgin is represented, her body swollen, limp limbs, and her feet uncovered.

Militarized Women

â€Å"On any given Friday or Saturday night, Korean women prostitutes hang out outside club doors soliciting GIs. Korean women stroll up and down Hooker Hill, approaching young GIs and asking them, â€Å"Lady† After asking the women how much and how old, they follow the Korean girls up the hill and down an alley.† While interviewing a GI friend stationed in Osan, Korea, this is an excerpt of his short story about military prostitution in Korea. This not only happens in Korea, but all over the world where military bases are located. This type of prostitution has a history that is traced back to the 1900†³s and not many people are aware of it. Following are the facts and history of this horrid trend: The Ordinance for the National Labor Service Corps that was issued in November of 1941, opened the door for them to use women between 14 and 24 years old for up to 30 days a year. Today in South Korea, ianfu also known as military comfort women, is an expression for those women who were forced into sexual slavery by the Japanese military. Since the 1910†³s Korean women had always been preyed upon, so they could be sold to Japanese brothels. The ianfu system grew from this background, and the state and the military voluntarily joined in for the pursuit and control of these women. The total number of ianfu was estimated at 100,000 to 200,000, and almost 80% of them were believed to be Korean. The ianfu system was believed to have been set up after the Shanghai incident in January 1932. It was a small military conflict between Japan and China after Japans invasion of Manchuria. During this conflict, many cases of rape of local women by Japanese soldiers were reported. This made Lieutenant General Yasuji Okamura to request the Governor of Nagasaki to send some women to comfort their soldiers. After the ianfus arrived, their were no more reported cases of rape. Because of this, troops nowadays almost always bring a group of ianfu with them. The military calculated the number of ianfu needed and sought out Korean women in their late teens or twenties, convincing them that they would be taking care of soldiers. The management of military brothels was handled by the military. Non-military members were not allowed to use these brothels. Military surgeons conducted the necessary periodic medical examinations of ianfu for venereal diseases, and condoms were giving to soldiers by the military to stop the spreading of venereal diseases. At these brothels, rules by the military were posted. The military provided food and medical needs and even sent them letters of gratitude. The following is an example set of rules for brothels made by the military: 1. â€Å"Military brothels do not admit anyone other than Army soldiers and gonzukus and visitors are required to show their brothel permit. 2. Visitors must pay service charges at the reception counter and in return receive and entrance ticket and a condom. 3. Service charges are as follows: 2.00 yen for non-commissioned officers, soldiers, and civilian employees. 4. Those having bought a ticket can enter a designated room, with a time limit of 30 minutes. 5. The ticket should be handed to the ianfu upon entering the room. 6. When finished, leave the room quickly. 7. Those violating rules or disturbing military morals will be forced to leave. 8. Do not touch ianfu without a condom†¦The Headquarter of the East Commissariat.† Looking at these rules, it indicates that the military was in no doubt involved in the management of these horrible brothels. China, Southeast Asia, the South Seas Islands, and Japan, everywhere the Japanese military went, the military brothels followed. When the war was eventually turned against Japan and the troops were forced to leave, some ianfu were left behind, some were forced to fight with soldiers until they died, and others were killed by the Japanese military. It is undeniable that the Japanese military managed these brothels, not the troops individually, but the army as a whole collected the ianfu to deal with the sexual needs of soldiers, and that the army ruined the dignity of the ianfu as women as well as human beings. They inflicted incurable pains on them, exposed them to venereal diseases, and endangered their health. Eventually, as these ianfus became a burden, they were either abandoned or disposed of as if they were nothing. After explaining how these women were forced into sexual slavery and the history behind it, the following is my analysis and opinions on this matter. These women were treated not as human beings but as â€Å"public toilets.† They were sometimes forced to service as many as a hundred soldiers a day. About 100,000 to 200,000 women†s self esteem, dignity, personality, and ethnic pride were severely wounded through long and daily abuse. Reading all this, many questions come to mind with anger, such as: Why has this all been kept in secrecy until recently? or How can the military, a strong form of government, let this happen to women? Currently there is no answer to these, but hopefully by writing this paper, it will educate more people about this issue, which is the first step in anything. These are problems limited only to women of less powerful countries. Sexual assaults GIs make against women is a clear violation of human rights. Being assaulted by a group of men called soldiers is an unspoken terror that is inflicted upon us women. The primary purpose of the military is to destruct and kill the bad, but all they were really doing was creating evil. Being raped is a woman†s worst nightmare. It invades our body, mind and soul leaving us feeling used and worthless. Women often put the blame on themselves, maybe for dressing too tight or too short, or for acting promiscuous, but in reality it has nothing to do with the way women act. The offender holds all blame. In reading one of the articles called, â€Å"Violation of Human Rights against Korean Women and Children by the United States Forces in Korea, it reads â€Å"To evade problems, Japanese claim that they have given comfort women military scrip†s, also known as U.S dollars or PX goods during War II†¦ We must look at this as an exploitation of women†s sex; in other words, it is offenders sly intention to transform an act of rape to that of prostitution and pass over their responsibilities to victimized women.† Is the giving of money or gifts suppose to lessen the pain? The soldiers are defending themselves by putting the blame on the victimized w omen, resulting in the woman feeling guilty. I can recall discussing this topic in section and talking about how many times the offender uses this strategy in protecting himself from the consequences. What I want to talk about is the effect that this type of prostitution has on women, and in ways that women and children can be trapped in it, in fact are often prepared for it as children. Back during the Korean War when Korean women were being used as ianfu, the women eventually had children from these soldiers. These children, made out of wedlock, were raised in this environment and soon enough became the norm. When the child reached the age of 15, she was often taken from her family to join a group of soldiers to serve as an ianfu. If the child happened to be a male, he was subject to be drafted into the military and use women for prostitution, it was an ongoing cycle. The everyday life of a prostitute is probably distant for many of us. Even our imagination could not make us feel the disgusting events that these women have suffered. It is like this: Negotiate a price with the stranger. Agree to it. Pull down pants. Come and take me until they†re done. Finished. Next Please. It becomes too ugly to take it in. We all know that this is a male dominated world. It stems from history, issues such as military prostitution and women slavery all indicate that the dominant gender is man. Although women have more rights than they did a century ago, women are still constantly struggling to find their place either in the home or work force. With these type of problems still occurring, discrimination against women will not end. Male dominance is a political system. Money is in no doubt directly tied to gender. Many of the Korean women used as prostitutes were from streets and poor families trying to find jobs that would feed their family. So when the military offered them a job as care takers of soldiers, they immediate jumped at the opportunity. It is assumed that women are not suppose to have money, because when women have money, then women can make choices. One of these choices that women can make is not to be with men. If the women make the choice not to be with men, then men will be deprived of the sex that men feel they have the right to. This is the foundation of male dominance. In conclusion, this paper has raised many issues involving women, especially in the military. When I received this research paper as my final paper for my Women†s Studies class, I began to think about all the options that I could write about. Topics such as; abortion, eating disorders, sexual violence, incest, and even that of prostitution, but I wanted it to have more of a twist. I remember talking to one of my good friends who is an enlisted officer in the USAF, who in stationed Korea and he told me about what GIs did to entertain themselves. Back to the story in the beginning, I decided to expand on it because I believe that many people do not know that this goes on. I can not even remotely describe how in disbelief I was when I did more research. I came across material that I would never know existed. In doing this research paper, I hope to educate more women about this type of prostitution and raise awareness that the military is involved. Women should not be treated as objects, and more like human beings.

Value of Learning and the Number of Bucks

College is a time to broaden your education and develop your skills. Different people go to college for different reasons but mostly for an education. The National Athletic Association is meeting next year and will decide if it needs to change its policy of not paying college athletes. I do not understand why this should be an issue. The main reason people go to college is to learn. So the NCAA will be deciding whether the athletes should be paid for playing their sport of choice thus demeaning the reason they are at college in the first place. There are millions of students who go to college each year; some play sports, others are in student government, and some are in theater. Each group is equally important to the college and in some cases are treated the same. If the athletes start being paid for playing sports then what†s going to stop the other students from finding a way to be paid for what they do. Does this mean then that students in student government should be paid for what they do or that the theater students should be allowed to join an equity theater union and be paid for doing shows? Paying athletes will create a rivalry among the students, for why should one group be paid for going to college while the others are not. The other thing to look at is that most student athletes are receiving scholarship and grant support from their college. Majority of the money that athletics being in is given back to the students through grants and scholarships. At Notre Dame, for example, grants-in-aid to student-athletes are worth about $5 million annually. Add to that the millions spent on travel, housing, equipment, health care and other costs and pretty soon you're talking real money. So yes, while athletics does generate millions of dollars in revenue for universities, there also are millions of dollars in expenses, most of which directly or indirectly assist the student-athletes. Sometime scholarships and grants are not enough which is why the NCAA recently passed legislation allowing student-athletes to work year-round. In addition, Pell Grants are available to the truly needy, and general student loans are another alternative. With all these options available, there shouldn†t be a need to pay student athletes. What's awful about the persistent whine for money is, it's saying a college education is worthless. People are suggesting that the value of learning can only be measured by the almighty buck. Paying students will put; too much emphasizes on sports and not enough on education. An education is priceless, and student-athletes at American colleges and universities reap the benefits of the finest higher education system in the world. From their education, students can go on in life and do what they want because they have the drive and education to. Student-athletes entertain us with their special skills and, in compensation, receive: all expenses paid competition in the sports they love, education that is worth thousands of real dollars with the promise of thousands more in future earnings, and the lifetime benefits of wisdom and character that come with being educated men and women. If we decide to pay college athletes, the only thing we accomplish is to move the universities further away from their stated ideals by making them more businesslike and disrupting the main point of college — to learn.

Adverb (Adverbial) Clause Definition and Examples

Adverb (Adverbial) Clause Definition and Examples In English grammar, an adverb clause is a  dependent clause used as an adverb within a sentence to indicate time, place, condition, contrast, concession, reason, purpose, or result. Also known as an  adverbial clause. An adverb clause begins with a subordinating conjunction (such as if, when, because, or although) and usually includes a subject and a predicate. Writing With Adverb Clauses Building Sentences With Adverb ClausesPractice in Arranging and Punctuating Adverb ClausesPractice in Building and Combining Sentences with Adverb Clauses Examples and Observations The name adverbial suggests that adverbial clauses modify verbs; but they modify whole clauses, as shown by the examples [below]. Their other key property is that they are adjuncts, since they are typically optional constituents in sentences. They are traditionally classified according to their meaning, for example adverbial clauses of reason, time, concession, manner or condition, as illustrated below.(a) ReasonBecause Marianne loved Willoughby, she refused to believe that he had deserted her.(b) TimeWhen Fanny returned, she found Tom Bertram very ill.(c) ConcessionAlthough Mr DArcy disliked Mrs Bennet he married Elizabeth.(d) MannerHenry changed his plans as the mood took him.(e) ConditionIf Emma had left Hartfield, Mr Woodhouse would have been unhappy.(Jim Miller, An Introduction to English Syntax. Edinburgh University Press, 2002)This is the West, sir. When the legend becomes fact, print the legend.(newspaper editor to Senator Ransom Stoddart in The Man Who Shot Liberty Valance, 1962) All human beings should try to learn before they die what they are running from, and to, and why.(attributed to James Thurber)If Wilbur is killed and his trough stands empty day after day, youll grow so thin we can look right through your stomach and see objects on the other side.(E.B. White, Charlottes Web. Harper Row, 1952)Although the world is full of suffering, it is full also of the overcoming of it.(Helen Keller, Optimism: An Essay, 1903)The greatest thrill in the world is to end the game with a home run and watch everybody else walk off the field while youre running the bases on air.(Al Rosen, third-baseman for the Cleveland Indians, 1947-1956)Again at eight o’clock, when the dark lanes of the Forties were five deep with throbbing taxi cabs, bound for the theatre district, I felt a sinking in my heart. Forms leaned together in the taxis as they waited, and voices sang, and there was laughter from unheard jokes, and lighted cigarettes outlined unintelligible gestures in side.(F. Scott Fitzgerald, The Great Gatsby, 1925) The swift December dusk had come tumbling clownishly after its dull day, and, as he stared through the dull square of the window of the schoolroom, he felt his belly crave for its food.(James Joyce, A Portrait of the Artist as a Young Man, 1916)Though we thumped, wept, and chanted We want Ted for minutes after he hid in the dugout, he did not come back.(John Updike, Hub Fans Bid Kid Adieu, 1960)As I ate the oysters with their strong taste of the sea and their faint metallic taste that the cold white wine washed away, leaving only the sea taste and the succulent texture, and as I drank their cold liquid from each shell and washed it down with the crisp taste of the wine, I lost the empty feeling and began to be happy and to make plans.(Ernest Hemingway, A Moveable Feast, 1964)When I was coming up, I practiced all the time because I thought if I didnt I couldnt do my best.(Attributed to Herbie Hancock)And when the broken hearted peopleLiving in the world agree,There will be an answer, let it be.For though they may be parted there isStill a chance that they will seeThere will be an answer, let it be.(John Lennon and Paul McCartney, Let It Be) According to legend, when Lady Godiva pleaded with her husband, the Earl of Mercia, to cancel a burdensome tax he had levied against his subjects, he agreed to do so only if she rode naked through the city.(Jim Hargan, The City of Lady Godiva. British Heritage, January 2001)Experience is what you get when you didnt get what you wanted.(Randy Pausch, The Last Lecture, 2008) The Lighter Side of Adverbial Clauses I drank some boiling water because I wanted to whistle. (Mitch Hedberg)I generally avoid temptation unless I cant resist it. (Mae West, My Little Chickadee, 1940)If I ever opened a trampoline store, I dont think Id call it Trampo-Land, because you might think it was a store for tramps, which is not the impression we are trying to convey with our store. (Jack Handey, Deep Thoughts, 1992)

Public Key Infrastructure Case Study Example | Topics and Well Written Essays - 750 words

Public Key Infrastructure - Case Study Example It is an accretion of technology, set-up and practices that empower extensive scale utilization of public key cryptography to give validness, confidentiality integrity, and non-repudiation facilities. It offers certainty of value in data sent and received naturally and the source and end of the information. Information that contains a public key structure can be used as evidence before the court of law. Components of the public key infrastructure maintain a high security of emails and other information components of an organization. The structural functioning of public key infrastructure is that it utilizes digital signatures, digital certificates, encryption, certificate revocation, authorities, and storage when sending an email (Chapple & Ballad, 2014). The functions of public key infrastructure are significant in the current work of technology. Some of its functions are public key cryptography, certificate issuance, certificate validation and certificate revocation. Public key cryptography is the utilization of a pair of algorithmically interrelated cryptographic keys. In the event, that one key is utilized to encrypt data, and then just the related key can decode that data. If a person knows one of the keys, they can without much strain ascertain what the other one is. A public key that is exposed to numerous people, but a private key is made known to its owner who upholds its secrecy and integrity strictly. Therefore, in a public system, it is important for one to have both the public key and the corresponding private key. The significance of the private key is that it enables one to prove who they claim to be. Public key cryptography is being applied in, amongst others, the IT security discipline data security. Data safety is c oncerned with all elements of securing electronic data resources against security threats. Public key cryptography is utilized as a system for guaranteeing the privacy, legitimacy and

Cooperative Learning Essay Example | Topics and Well Written Essays - 2750 words

Cooperative Learning - Essay Example Moreover, each member of a team is responsible not only for learning what is taught but also for helping teammates learn, thus creating an atmosphere of achievement. Hence, students work through the assignment until all group members successfully understand and complete it (Kennesaw State University, 2009) There are several uses and benefits of cooperative learning, which have been typified by many authors. As such, according to Kennesaw State University (2009), the use of cooperative learning research design renders the following benefits: As stipulated by the authors above, cooperative learning provides positive learning experiences on students and might as well to the teachers. It improves not only the intellectual aspect of students, but also their overall sociability, that is, improved social interaction, communication, and above all, cooperative learning epitomizes the respect to classmates or members of a group regardless of color, ethnicity, or race. The above methods of cooperative learning are said to have considerable diversity (Kagan, 1985). Nevertheless, although the aforementioned methods have different philosophies distinct from one another, a common purpose seems to be their uniting point- group empowerment through cooperation (Kagan, 1985). According to Kagan (19... 5. It promotes positive social relations and pro-social development; and 6. It increases the liking among students for class, school, learning, and self. (p 67) As stipulated by the authors above, cooperative learning provides positive learning experiences on students and might as well to the teachers. It improves not only the intellectual aspect of students, but also their overall sociability, that is, improved social interaction, communication, and above all, cooperative learning epitomizes the respect to classmates or members of a group regardless of color, ethnicity, or race. The Methods of Cooperative Learning Cooperative learning has various methods, which adhere to its principle of learning through cooperation. Kagan (1985), in his chapter, presented six cooperative learning methods, which are as follows: 1. Student Teams-Achievement Division (STAD) a) Class Presentations b) Teams c) Quizzes d) Individual Improvement Scores e) Team Recognition 2. Teams-Games-Tournaments (TGT) a) Game Tournaments 3. The Orginal Jigsaw (or Jigsaw I) 4. Jigsaw II 5. Group Investigation 6. Co-op Co-op The above methods of cooperative learning are said to have considerable diversity (Kagan, 1985). Nevertheless, although the aforementioned methods have different philosophies distinct from one another, a common purpose seems to be their uniting point- group empowerment through cooperation (Kagan, 1985). The Elements of Cooperative Learning According to Kagan (1985), cooperative learning has certain elements that make its distinction from traditional instructional formats, which are summarized by the Kennesaw State University (2009), as follows: 1. Positive Interdependence 2. Face-to-Face Interaction 3. Individual and Group