Saturday, October 12, 2019
The Minimum Wage Essay -- Minimum Wage Research Paper
"The minimum wage is something that F.D.R. put in place a long time ago during the Great Depression. I don't think it worked then. It didn't solve any problems then and it hasn't solved any problems in 50 years." -- John Raese For many years it has been a matter of conventional wisdom among economists that the minimum wage causes fewer jobs to exist than would be the case without it. This is simply a matter of price theory, taught in every economics textbook, requiring no elaborate analysis to justify. Were this not the case, there would be no logical reason why the minimum wage could not be set at $10, $100, or $1 million per hour. Historically, defenders of the minimum wage have not disputed the dis-employment effects of the minimum wage, but argued that on balance the working poor were better off. In other words, the higher incomes of those with jobs offset the lower incomes of those without jobs, as a result of the minimum wage l "levitan". Now, President Obama is advancing the novel economic theory that modest increases in the minimum wage will have no impact whatsoever on employment. This proposition is based entirely on the work of three economists: David Card and Alan Krueger of Princeton, and Lawrence Katz of Harvard. Their studies of increases in the minimum wage in California, Texas and New Jersey apparently found no loss of jobs among fast food restaurants that were surveyed before and after the increase [ l "card-92b", l "krueger", and l "katz". While it is not yet clear why Card, Katz and Krueger got the results that they did, it is clear that their findings are directly contrary to virtually every empirical study ever done on the minimum wage. These studies were exhaustively surveyed by the Minimum Wage Study Commission, which concluded that a 10% increase in the minimum wage reduced teenage employment by 1% to 3%. The following survey of the academic research on the minimum wage is designed to give nonspecialists a sense of just how isolated the Card, Krueger and Katz studies are. It will also indicate that the minimum wage has wide-ranging negative effects that go beyond unemployment. For example, higher minimum wages encourage employers to cut back on training, thus depriving low wage workers of an important means of long-term advancement, in return for a small increase in current income. For many workers this is a very ... ...g (1996), " `Who Gets What' from Minimum Wage Hikes," Industrial and Labor Relations Review 49 (April): 547-52. à ·Ã à à à à ------, and T. A. Finegan (1989), "The Minimum Wage and the Poor: The End of a Relationship," Journal of Policy Analysis and Management 8 (Winter): 53-71. 23w à ·Ã à à à à Card, D., and A. Krueger (1995), Myth and Measurement (Princeton, N.J.: Princeton University Press). à ·Ã à à à à Deere, D., K. M. Murphy and F. Welch (1995), "Employment and the 1990-1991 Minimum Wage Hike," American Economic Review Papers and Proceedings 85 (May): 232-37. à ·Ã à à à à Gramlich, E. (1976), "Impact of Minimum Wages on Other Wages, Employment, and Family Incomes," Brookings Papers on Economic Activity 2: 409-51. à ·Ã à à à à Lang, K. (1994), "The Effect of Minimum Wage Laws on the Distribution of Employment: Theory and Evidence," Working Paper, Boston University. à ·Ã à à à à Neumark, D., and W. Wascher (1995), "The Effects of Minimum Wages on Teenage Employment and Enrollment: Evidence from Matched CPS Surveys," NBER Working Paper No. 5092, April. à ·Ã à à à à Smith, R., and B. Vavrichek (1992), "The Wage Mobility of Minimum Wage Workers," Industrial and Labor Relations Review 46 (October): 82-88.
Friday, October 11, 2019
Copper Sulphate Calibration
Method As per laboratory protocol. Rest Its and Discussion From the table and graph it shows that there is a linear relationship between concentration and absorption (Beer-Lambert Law). As the concentration increases so does the absorbency. The line of regression fits into the averages of the UP Absorbency, the RE is 0. 9538 this shows that the data is accurate as it is very close to the regression line. Taking the averages of the CIVIC Absorbency allows the data to become more accurate and reliable. Cavetti MM cuscus (ml) Distilled Water (m L)Concentration (M) XIV Absorbency (Average) Dividing the unknown solutions by y is the way to find the concentrations of the unknown solutions. Plotting the unknown solutions On the graph Can test the reliability of the results of the concentration. The results are close to the line of regression, this indicates that the values which were calculated are accurate. The results which were gathered could have been skewed from the way the cavetti was placed into the spectrophotometer.For instance, if the puttee had fingerprints on it, the wavelength would not penetrate the cavetti properly as the fingerprints may modify the way the light penetrates the solution, thus gathering an incorrect concentration reading. One way to avoid this is to clean the cavetti before placing it into the spectrophotometer, plus making sure that it is placed into the apparatus the right way. Whilst the 1 mol of Copper Sulfate was measured with the Gilson there may have been a small chance of the measurement being inaccurate, however, a Gilson is more likely to give an accurate measurement of a solution than a pipette old.When using a spectrophotometer it is essential that the apparatus is switched on and left to warm up for at least 15 minutes, if this is not executed and the experiment is done with a ââ¬Ëcold' spectrophotometer the readings may be unstable. Between each reading of the solutions the spectrophotometer transmittance needs to be set back to O, if this is not done the reading will be incorrect, therefore jeopardizing the accuracy and reliability of the results. Conclusion Within this practical the aim was achieved, the absorptions of the diluted solutions were determined and accurate.
Thursday, October 10, 2019
British Airways Swot Analysis Essay
Introduction The growing competency in the airline industry is also subjected in the different economic uncertainties. Due to the high risks in the globalization, the confidence of the business leaders is lowered. This can be caused by the different constraints and challenges that create a great impact in the industry. The recession in most of the developed and successful countries is difficult to assess and the recovering period is not in sight. British Airways stays in the top of the competition and continuously providing the basic services that a world-class airway can offer. However, the influence or the impact of the various economic uncertainties creates a great challenge in the organization. From the different perspective on competition of the propellers, the marketing environment of the organization is bound to change which results in an analysis of the organizationââ¬â¢s economic factors. The British Airways expects that due to the tope of the economic challenges, the organization should stay competitive in the industry. Therefore, different theoretical aspects are created in the study to support the aim of the organization in fulfilling their dreams for success. SWOT Analysis British Airways is one of the largest service industries that well managed the operation with an interesting collaboration with the technological innovations. The aim of the organization is to increase the number of customers through delivering the quality of service and satisfaction. Albeit bothered with the challenges in the nature of their business, the airway is still committed to serve in a very ideal way for safety travel. Strengths The most basic strength of the British Airways (BA) that served the entire organization for years is to deliver an adequate solution for travelers in a most safety and satisfying way (Chan, 2000). Aside from the use of various marketing strategies on the world-wide web, the airline marketing and service are performed by most of the females. Prior to the equal labor for both genders, it is considered as the strength of the organization for most of the females are trained to speak in various dialects. It is an advantage for the airways to accommodate various races and at the same time, commit itself to deliver the equal rights in terms of labor (Whitelegg, 2002). Weaknesses The world-wide marketing answer of the BA is entirely prioritizing most of the demands of the clients. But in their strategy in a low cost-ticket can be risky in a long run of the business. Offering the low prices for tickets may not appear harmful in the business but definitely, if the business has greater expenditure over the revenues, there will experience drastic losses (Binggeli and Pompeo, 2002). The creation of the low-cost carriers can weaken the services of some areas because the allotted budget will not satisfy the proposed use of service (Berry, Carnall, and Spiller, 2006). Opportunity The organizationââ¬â¢s idea about ââ¬Å"managing the people firstâ⬠is a tremendous opportunity for their employees. The leaders can create a department wherein most of the people can concentrate on the various marketing strategies such as promotions to enhance the competitiveness of the organization in the industry (Gowler, Ledge, and Clegg, 1993). Another opportunity that the organization may find is their advantage in the use of the quality technologies. Through the innovative ways of the management, the organization can rely on their information systems wherein the strategic marketing and related works can be performed. Through the use of the Internet, the customers can experience the efficiency in online booking and can facilitate the continuous growth of the organization. Threats One major contribution of the BA threats is the increased competition among the airline industry. Through the different competitions, there is a vast option for the customers and most of them choose the best price and service that is fit on their budgets. Through the development of the different explorations, there is a view for the merger and acquisitions (Culpan, 2002). The alliance in the airlines is popular in which the strategies are bind together and the sole action of the organization is limited. Conclusion The British Airways should learn the appropriate on the presented analysis to avoid the drastic changes in their businessââ¬â¢s performance. The strategy of the organization to deliver the right service on their customers is a greatà advantage because they are aiming for the customerââ¬â¢s satisfaction. But the organization should provide additional strategy to avoid the possible losses. With the appropriate collaboration of the marketing strategies, the BA can create more room of opportunities and strengths that can deliver the entire organization into a great success. References: Berry, S., Carnall, M., & Spiller, P., (2006) ââ¬Å"Airline Hubs: Costs, Mark-ups and the Implications of Customer Heterogeneityââ¬â¢ in Lee, D. (ed)â⬠, Advances in Airline Economics, vol. 1, Competition Policy and Antitrust, Elsevier, Cambridge, USA. Binggeli, U., & Pompeo, L., (2002) ââ¬Å"Hype Hopes for Europeââ¬â¢s Low-Cost Airlines: Europeââ¬â¢s Most Successful No-Frills Carrier Are Making a Lot of Money. But as They Mature, They Will Have Problems Expandingâ⬠, The McKinsey Quarterly. Chan, D., (2000) ââ¬Å"The Development of the Airline Industry from 1978 to 1998: A Strategic Global Overviewâ⬠, Journal of Management Development, Vol. 19, No. 6. Culpan, R., (2002) ââ¬Å"Global Business Alliances: Theory and Practiceâ⬠, Quorum Books, Westport, CT Gowler, D., Ledgge, K., & Clegg, C., (1993) ââ¬Å"Culture and Commitment: British Airways by Heather Hopflââ¬â¢ Organizational Behavior and Human Resource Managementâ⬠. London: Paul Chapman Publi shing Whitelegg, D., (2002) ââ¬Å"Cabin Pressure: The Dialectics of Emotional Labor in the Airline Industryâ⬠, The Journal of Transport History, Vol. 23, No. 1 Read more: http://ivythesis.typepad.com/term_paper_topics/2010/03/an-analysis-of-british-airways-marketing-environment.html#ixzz14VGZrJmz
Critical Review for a Research Article Based on Grammar Translation
INTRODUCTION For centuries, Strategies on teaching and learning second language has been formed and apply in the classroom. Based on that, many researches has been conducted to test these methods in teaching and learning process to examine whether it is efficient or just a waste of time. By reading through these researches, teacher has been given responsibility to choose which methods that can be adaptable to their own respective classroom and how it would help them with the lessons.Through this project, we have chosen a research articles that was conducted in China to find out how a specific teaching method will help in the teaching and learning process by examining the research articles written by Lingjie Jin, Michael Singh, and Liqun Li. Furthermore, we will identify the teaching methods that were used by them and it relevance to the teaching and learning process in China.The study sought to investigate whether the communicative approach could help students acquire their vocabular y while reading through communicative activities, and develop their ability of using language and arouse their interest in learning English. 1. 0 METHODS USED IN THE STUDY. 2. 1 The Grammar Translation Method This method is more focusing on memorization of verb paradigms, grammar rules and vocabulary. Application of this knowledge was directed on translation of literary texts which is focusing on developing studentsââ¬â¢ appreciation of the target languageââ¬â¢s literature as well as teaching the language.Written and oral translation plays a prominent part in classroom work. This encourages the learners to think and translate into their first language. Classes were conducted in theà native language which is the first language. A chapter in a distinctive textbook of this method would begin with a massive bilingual vocabulary list. Grammar points would come directly from the texts and be presented contextually in the textbook, to be explained elaborately by the teacher. In thi s method, while teaching the textbook the teacher translates every word and phrase from English into the learners' first language.A number of methods and techniques have evolved for the teaching of English and also other foreign languages in the recent past, yet this method is still in use especially in Asian country such as China. It maintains the first language of the learner as the reference particularly in the process of learning the second/foreign languages. The main principles on which the grammar translation method is based are the following: 1. Translation interprets the words and phrases of the foreign languages in the best possible manner. 2.Theà phraseologyà and theà idiomsà of the target language can best be assimilated in the process of interpretation. 3. Theà structuresà of the foreign languages are best learned when compared and contrast with those of first language. 2. 2 The Communicative Language Teaching Method Communicative has been developed by Britis h Applied linguists as a reaction away from grammar-based approaches. CLT also places great emphasis on helping students use the target language in a variety of contexts and places. It is a great emphasis on learning four language skills ââ¬â listening, speaking, reading, writing.Its primary focus is on helping learners create meaning rather than helping them develop perfectly grammatical structures or acquire native-like pronunciation. This means that successfully learning the English language is assessed in terms of how well learners have developed their communicative competence, which can loosely be defined as their ability to apply knowledge of both formal and sociolinguistic aspects of a language with adequate proficiency to communicate. CLT is usually characterized as a broad approach to teaching, rather than as a teaching method with a clearly defined set of classroom practices.As such, it is most often defined as a list of general principles or features; 1) An emphasis o n learning to communicate through interaction in the target language. 2) The introduction of authentic texts into the learning situation. 3) The provision of opportunities for learners to focus, not only on language but also on the learning management process. 4) An enhancement of the learnerââ¬â¢s own personal experiences as important contributing elements to classroom learning. 5) An attempt to link classroom language learning with language activities outside the classroom. 2. BACKGROUND OF CLT AND GRAMMAR-TRANSLATION METHODS IN CHINA The main purpose of CLT is to develop learnersââ¬â¢ communicative competence. Communication is important in order to follow with the development of economy. When communicative language teaching (CLT) was introduced in China at first, it met with considerable resistance (Li, 2003; Zhu, 2003; Hu, 2002). Its pioneers changed the traditional grammar-translation method into a student-centred communicative approach. It is become unusual in learning f or the students because they need to communicate in class rather than hearing the teacher explanation.English language teaching in China was established by divergent stories and not a single narrative. According to Rao (2002), in learning the English language, the Chinese learners are more focusing on reading and writing; grammar and translation; memorization of vocabulary. However, the traditional grammar-translation method failed to make them improve in their communicative skill. In order to catch up with the development of economy and promote exchange, studentsââ¬â¢ communicative competence even their overall ability in language need to be improvedMost of the ELT teachers who had adopted CLT method grew less confident of it. This is because of their qualification and the National Testing System. At the end of 1990sââ¬â¢, a person named Zhu has summarized with an increasing series of CLT text books that were published. CLT started to be accepted and teachers were encouraged to teach communicatively and interactively in classes. Students were unable to communicate effectively in foreign language and they were dissatisfied with their communicative competence skills.Although CLT was introduced into the Chinese EFL classes in the early 1980s, the traditional grammar method is still employed in most classes. Before 2000, college English text books were used in most universities for more than 10 years designed for traditional methods such as grammar translation method. The students were being used to passive and obedient to teachers, waiting patiently and quietly what teachers give them. An experiment project was conducted about college English teaching with communicative approach and a new series of textbooks.The purpose was to find out the results of applying and assess of effectiveness of the communicative approach in English reading classes. 3. 0 PROCEDURES OF THE STUDY An experiment project was conducted about college English teaching in Automobile Coll ege of Jilin University. The study began on September 2002. 8 non-English major classes were chosen at random. 4 classes will use CLT method in the teaching and learning process (Group C) and another 4 classes will used grammar-translation method (Group T). It lasted for 2 semesters with 116 participants on Group C and 118 on Group T.Jin, Singh, and Li prepared a Pre-treatment questionnaire asked about the studentsââ¬â¢ perception of the discourse structures and reading strategies at the beginning of the semester. 116 students received the questionnaire and returned them. Then, they were told about learner-centred approach, learner autonomy, the roles of themselves and teachers in class. To conduct the study on communicative approach, three steps were taken, which is a warm-up activities, reading activities, and follow up activities. 3. 1 Warm up activitiesStudents were required to do a group discussion, pair work and individual presentation to familiarise the topic that they wer e going to read. The need of such thing is to make sure that everyone will take part in the activities. Teachers will sometimes have to join in as a partner. The studentsââ¬â¢ interest in English learning was encouraged in such a dynamic and active atmosphere. 3. 2 Reading activities In order to make sure that students understood the global structure and was aware of the main idea in the material they were reading, teacher and students analysed the characteristics of different discourse structures together in class.Predictive and jigsaw reading activity were organised to improve studentsââ¬â¢ clarity of the discussion. 3. 2. 1 Predictive Reading Activity The activities was suitable for narrative passages which were divided into parts for one group, then another to read one in limited time, then they also were asked to work in small group and had to offer their own prediction and share with the whole of the class. After that they went on to read and test their different expecta tions. Whoever share the same ideas with the author would be very excited, others with different prediction were amused, too. . 2. 2 Jigsaw Reading Activity Teacher divided the selected material into sections and divided students into group; with limited time given, they were asked to read only one paragraph for each group to find a main idea and prediction for the next and before the paragraph. When they come into problems, they will try to solve it discussing issues with their peers. There are two procedures for this activity: A- First, one student from each group made a report on their findings and other students will have to listen attentively to take note.After all the reports, students have collected all the main content from all groups then in their group, decide the order of the paragraph. At the end of the activities, the whole class will agreed on the logical sequences. B- Secondly, students were divided into different groups, with each member coming from a different group . Each student in the new group brought their materials and all of them organised the passage according to the most logical order. 3. 3 Follow up Activities By the end of the activity, teacher asked questions about the passage to acquire the feedback from the students.All the activities were arranged for all students in the class to participate actively in the interactions and eventually improved their overall English language ability. 4. 0 OUTCOMES The study done by Lingjie Jin, Michael Singh, and Liquin Li has achieved the following result which is the comparison on test result, time taken by the teacher in class, and feedback between Group C and Group T which practiced the Communicative Language Teaching and Grammar-Translation methods in class for two semesters respectively. 4. 1 Test ResultStudents were required to take a test paper to check their skills on reading (R40), listening (L15) and vocabulary and structures (L15). The numbers being allocated to it are the fullest mark s. Test papers were exactly the same in listening and reading. The part of vocabulary and structures were all from their respective textbooks. TEST/GROUP| GROUP C| GROUP T| R40| 30. 18| 29. 56| L15| 10. 58| 8. 54| V15| 9. 09| 8. 22| Table 1 : Test result for Group C and Group T Judging from the result of the test, students in Group C did better than those in T-group in all aspects.They were especially superior in listening, and slightly better in vocabulary. This does seems that a communicative approach can improve studentsââ¬â¢ performance in examination and does not undermine their capacity to succeed in tests. 4. 2 Tape Result The process of teaching and learning of the groups were recorded in audio and checked to see the differences between the two classroom management with grammar-translation and communicative approaches. In the GT classes, the teachersââ¬â¢ lectures took about 91% of the time in class.On the other hand, 64% of the time was spent in student-centred activi ties which ultimately give chances for all students in the classroom to speak English. 4. 3 Feedback Comments on the training program were obtained for a group of college students just graduated from high-school. 29 people out of 30 showed a favourable attitude and acknowledged their progress in all of listening, speaking, reading and writing skills during the three-month training. From the 116 students, 85% of them said they liked the CLT methods better.Students in Grammar-Translation group just sat there nodding mechanically with no chance to speak language. They commented that the teachers were training them to be like robot because they just accepted what the teachers gave them. At the end of the first semester, three university supervisors observed the class with CLT methods and confirmed the active, motivating atmosphere and the positive, effective functions of it. 5. 0 CHINESE STUDENTSââ¬â¢ PERCEPTIONS ON THE TEACHING METHODS. Another research study has been conducted by Z .Rao (2002) to investigate Chinese studentsââ¬â¢ perceptions of communicative and non-communicative activities and their difficulties in EFL classes that used CLT method. The instruments include a questionnaire and semi-structured interviews. 30 Chinese English-major college students were chosen at random from those who exposed to CLT for completing a survey. 15 of them were sophomores, 15 were juniors, with 21 females and 9 males, ranging in age from 18 to 23. The questionnaire consisted of three parts. Part A was about the studentsââ¬â¢ background, English proficiency and their opinions of communicative and non-communicative activities.Part B composed of 19 items asking about communicative and non-communicative activities. Part C invited students to explain their difficulties in communicative activities in class. 5. 1 Research results. The data was examined after it was collected and analysed inductively. The survey results showed that the students preferred non-communicativ e activities, compared with communicative ones although they liked a variety of class activities. Almost all students preferred teachersââ¬â¢ grammatical explanations in English mother-tongue-avoidance strategy in class.Sometimes the lack of authentic English context and confidence in themselves prevent them from participating in communicative activities. Some dynamic, creative activities were welcomed by good English learners. All students thought it helpful for teachers to direct class discussions, and they were they were interested in authentic English materials, e. g. newspaper or magazine articles. All students were interested in CLT methods in class, twenty-two of whom liked non-communicative activities better, and eight preferred communicative activities.All of them thought the combination of communicative and non-communicative activities was better. Because of most examinations were grammar-based, and many studentsââ¬â¢ motivations for learning of English was career-or ientated. They didnââ¬â¢t attach importance to communicative activities although they were interested in them. And 25 of 30 students thought they were used to the traditional grammar-translation method which was teacher-centred, textbook-driven and emphasized rote memory. They consider their teachers were authority and reluctant to challenge them. CONCLUSIONAfter a deep look into the research articles conducted by three capable and professional professor of English Education, we realise that most classes in China uses Grammar-translation method on their teaching and learning process instead of the more modern approach on language teaching such as CLT. It is by no means an expired approach because students in China still preferred to use the method and claim it sufficient in learning English language. The paper done by Li, Jin, and Singh has explored the CLT method to college English and compared them with traditional method of grammar-translation.Li (2003) summarises that judging from the feedback from the students and the results of examinations, communicative approach was advantageous and favourable, it aroused their interest in English language and developing their learner autonomy. Although the study shown that CLT method is much more efficient with a higher result on English language skills (listening, speaking, writing, and reading), Rao (2002) has conducted one research on studentsââ¬â¢ own perceptions instead of looking at the end result of studentsââ¬â¢ proficiency in English language which resulted in favour of the more traditional method of grammar-translation.According to Rao (2002), teacher may help their students understand the nature of the language, the features of CLT, the function of the class, the role of student and the teacher. They could create environment for students to practise the language which give them some insights into real-life situation. Adding to that, teachers could be facilitators that help students to access authen tic English language materials. It will offer students knowledge into other nations, peoples, ultures, and everything significant. Thus it has come to our understanding that even though both methods might be applicable to English language classes depending on the variable of the studentsââ¬â¢ conception and environment, teachers could be the initiators that encourage students to accept the other modern methods and be the one who clear away misconceptions that might be used to hinder the teaching and learning process in classroom.REFERENCES 1- Lingjie Jin, Michael Singh, Liqun Li; Communicative Language Teaching in China: Misconceptions, Applications and Perceptions. (2005) Australian Association for Research in Education. 2- Rao, Z. (2002), Chinese Studentsââ¬â¢ Perceptions of Communicative and Non-Communicative Activities in EFL Classroom. System 30, pp. 85-105. 3- Xiao Qing Liao; How Communicative Language Teaching Became Acceptable in Secondary Schools in China.The Internet TESL Journal, Vol. VI, No. 10, October 2000; http://iteslj. org/. 4- Rao Zhenhui; Foreign Languages College, Jiangxi Normal College, China. Modern vs. Traditional. Taken 10 October 2012 from http://eca. state. gov/forum/vols/vol37/no3/p27. htm. 5- Rhalmi Mohammed Iââ¬â¢m Rhalmi Mohammed; articles on Grammar Translation Method (April 2009) and Communicative Language Teaching (Sep 2009) taken on October 2012 from http://myenglishpages. com.
Wednesday, October 9, 2019
Polyeurethanes Research Paper Example | Topics and Well Written Essays - 750 words
Polyeurethanes - Research Paper Example Some of these chains can be very small, while others can extend to incorporate many monomers on orders of hundreds to thousands. The length and complexity of the chain also affects the chemistry and how the compound will interact under specific conditions. For example, as the chains get longer, chemical properties such as melting point and boiling point increase with resistance and hardening, but chain mobility decreases (Mark 3-24). As a result, this impacts the mold ability of the polymer. One of these polymers that our society has adopted across many industrial and commercial applications is Polyurethane. Polyurethane is a polymer, which consists of repeating units of a core structure containing: urethane groups in addition to benzene rings and the carbon chain. The polymer was first synthesized in Germany by chemist, Otto Bayer, in 1937. The primary complex of chemicals, which are used, is isocynate and polyol. These chemicals size, purity, and quality all influence how fast the reaction will go to completion, as well as the chemical forces will affect the properties of the compound. The reaction is catalyzed to begin the polymerization reaction by tertiary amine compounds. Polyurethane is classified in a group of other compounds known as reaction polymers. The properties of polyurethane can change based on the types of monomers, which are substituted into the carbon chain. When in a solid form, polyurethane is a flammable material and can have some side effects with exposure to humans. It can cause eye and lung irritation, but is not a known carcinogen (Ashida 5-9). Commercially, polyurethane has become an important type of epoxy, which is used in a wide variety of applications in the manufacturing industry as well as products and services. Because of the multiple substituents that can occur in the polymer, it can have the properties of rubber, but still be tough enough to withstand great amounts of force as well as endure high temperatures. It was origina lly designed to supplement rubber, and eventually replace it. Now, it is used in many commercial applications. It is used to help hold upholstery and dashboards in vehicles. The ââ¬Å"harderâ⬠variants of this material are used in shoes, as adhesives and coatings as well. One of the more typical applications of this was the discovery that this polymer could be used as foam. The synthesizing of the foam compound of polyurethane is a bit different than the standard compound. It involves a reaction with carbon dioxide and water, which is what it gives it the high degree of mold ability. One important fact that has to be noted about this particular reaction is that it is an exothermic reaction, meaning that high amounts of heat are released upon the catalyzation of the polymerization reaction. As a result the use of the foam polymer has seen the most widespread use in terms of the other variations. Itââ¬â¢s most common application is through the use of insulation in houses. Bec ause the foam is form fitting, it can block holes and unusual spaces, which conventional materials would fail to block. This has also made it a good sealant for tires. The use of the foam type of polyurethane also extends to use on airplanes, as soundproofing, use in electrical equipment, etc (Moore). Polymers and the basis of polymer science have had a large impact not only on industrial and commercial companies, but also in the daily lives of our
Tuesday, October 8, 2019
Press release Article Example | Topics and Well Written Essays - 500 words
Press release - Article Example NGO under Penal Reform aims at training prison staff on a number of areas. Areas of interest range from rehabilitation priority to discrimination reduction as well as incorporating respect for humanity when handling prisoners. The prison law enforcing officers will get training on the legislative reforms that seek to improve legal precautionary measure for prisoners. It is also the mandate of the NGO during the process to develop proper and appropriate training curricula for prison law enforcing officers. It will as well provide prison staff with technical assistance to training in conflict resolution. At that time, the prison staff will get an opportunity to understand the need to apply other human right friendly methods of discipline. Training prison staff will provide other possible alternatives to corporal punishment to inmates. Alternatives such as services to the community, working in the government farms among others. Prison staff will also acquire special training on how and when to receive complaints from the prisoner as well as addressing them amicably. The NGO also seeks to promote the standard principle organization that protects all persons under any form of detention. The NGO has also laid down foundation to raise public awareness about prison population and its composition. Based on its plan, the NGO intends to take into account the affairs of vulnerable groups and harmful impacts of imprisonment. The detainees will have a chance to understand their rights and give them the advantage of pre-trial detention or imprisonment. The prison wardens should also learn during the training that the post-conflict areas need a healing and reconciliation mechanisms. Healing and reconciliation process does not encourage brutal means of handling inmates. The NGO further wishes to announce its collaboration with other stakeholders to secure funds
Monday, October 7, 2019
Conservation biologist Assignment Example | Topics and Well Written Essays - 250 words
Conservation biologist - Assignment Example I.à The demand for metals, as well as other natural resources has outstripped supply (Blogger 1). Such a situation has occurred because of the increase of the surge for these essential resources. II.à Discovery of new deposits results in exploitation as a means of offering solutions to the need for the natural resources. However, implementation of such actions does not contribute in the attainment of success in the international trade since they lead in the development of complexities and political constraints. III.à Ore deposits should not be degraded because of the impact of their exploitation and societal conditions.IV.à The sea floor is one of the essential human resources on the earthââ¬â¢s surface, which demands an effective stewardship. V.à As the terrestrial environmental, the sea floor has plateaus, mountain ranges, vast plains, canyons and volcanic peaks. It has similar minerals to the ones on land in enriched forms.VI.à Deep mining is a strategy that should be avoided at all times to preserve these natural resources and eliminate their exploitation. VII.à Critics argue that mining is essential to provide the minerals, metals and other resources that man needs. Such should occur through the use of intensive technological means of mining and processing. VIII.à However, these individuals are wrong since they fail to comprehend the need to preserve these natural sources of minerals for further exploitation in the future. IX.à Conservation of biology is a good act towards ensuring.
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