Saturday, January 25, 2020
Inserted-Plate Coated of Methanol Steam Reformer
Inserted-Plate Coated of Methanol Steam Reformer High Efficiency Inserted-Plate Coated of Methanol Steam Reformer: PEM Fuel Cell Applications Methanol can be easily stored and transported and converted to H2 using a reforming reactor that makes it an excellent hydrogen and energy source for fuel cell applicationsEasily storage, transporting and converting to H2 by a reforming reactor using makes it an excellent energy source for PEMFC applications [1-3] During the last decades, there has been a growing interest on developing technologies taking advantage of clean energy sources. The reduction of atmospheric pollution and, namely, the emission of greenhouse gases have become imperative and, among the new technologies for mitigating these emissions, fuel cells have the ability to efficiently convert chemical into electrical energy. In particular, PEMFCs are zero-pollutants emission systems because they transform the chemical energy of the electrochemical reaction within hydrogen and oxygen into clean electrical powerTodays, for environmental issues, growing interest on developing technologies including clean energy sources has been focused. Pollution issue and, especially, the emission of greenhouse gases have become crucial and, the new technology for elimination of these emission, can be achieved by PEMFC. [4, 5] Meanwhile, compared to other feedstocks, methanol exploitation shows various advantages as a hydrogen carrier for fuel cell applications and, namely, it can be produced from renewable sources[9], and the reforming reaction occurs at relatively low temperatures, ca. 240ââ¬â260 1CAmong these, methanol exploitation leads various advantages as a hydrogen carrier and, especially, reforming reaction applying at relatively low temperature (240-260 C) [6] , compared to the methane reforming, normally performed at 800ââ¬â1000 1C, compared to the methane reforming, normally carry out at 800-1000 C[7] . Methanol steam reforming (MSR) reaction has been seen as a very attractive and promising process for hydrogen production and, according to the scientific literature on the argument, it can be described by the following chemical reactions:Attractive and promising of the methanol steam reforming process cause especial insight to this reaction which according to the scientific references, occurs by the following chemical reactions: Where reactions 1, 2 and 3 represent MSR reaction, water gas shift reaction and methanol decomposition reaction, respectively.Reaction (1), represents MSR reaction, reaction (2) represents water gas shift reaction and reaction (3) represents the methanol decomposition reaction The reactor design has direct impact on the reaction conversion, but owing to higher technical complexity and manufacturing costs of other designs, the reformers and MRs are normally tubular. However, recent efforts in the area of micro-processing made possible and easier to manufacture other reactor designs and namely well-structured à ¯Ã ¬Ã¢â¬Å¡at micro-reactors. A micro-reactor is defined as a device that contains micro structured features, with a sub-millimeter dimension, in which chemical reactions are performed in a continuous manner They present advantages compared to conventional ones such as higher surface-to-volume ratio, smaller mean distance of the specific à ¯Ã ¬Ã¢â¬Å¡uid volume to the reactor walls, better heat and matter transfer properties and à ¯Ã ¬Ã¢â¬Å¡ow patterns that fit with the reaction needs. Furthermore, à ¯Ã ¬Ã¢â¬Å¡at reformers are suitable for stack integration with fuel cells. Packed-bed micro-reactors require well-define catalyst particles, wi th regular shape and much smaller than the internal dimensions of the micro-channels, which is a problem for most of commercial catalysts.The reactor design, directly impress reaction conversion but owning to higher complexity and fabrication costs should be considered. Common normally MRs are in tubular shape. However, recent researches show easier to manufacture and possibility of other designs and namely well-structured flat micro-reactors. A reactor containing micro structure features and sub-millimeter dimension through performing in a continues manner representing advantages such as higher surface to volume ratio, smaller mean distance of the specific fluid volume to the reactor walls, improving heat and mass transfer make appropriate situation of stack integration with fuel cells. [8]. Many studies have been developed to explore the advantages of micro/mini-reactors to produce hydrogen through MSR The design of a reactor targets the maximization of the conversion and selectivity at the lowest costs and its performance is inà ¯Ã ¬Ã¢â¬Å¡uenced by the à ¯Ã ¬Ã¢â¬Å¡ow pattern, velocity profile, pressure drop and heat transfer, so all these aspects must be consideredTo fabricate an effective micro-reactor having maximum conversion and selectivity at a low cost is impressed by the flow pattern, velocity profile, pressure drop and heat transfer, therefore all these approaches should be considered[9]. For conducting MSR reaction, most of the used reactor designs are rectilinear channels, pin-hole, coil-based and radial (Fig. 2).Coil-based reactor designs allow high conversions, but impose a significant pressure drop penalty, which may be a limitation for compact applications Categorization of the design consist rectilinear channels, pin-hole, coil-based and radial (Fi g. 2). Among these, Coil based leads high conversion and pressure drop preventing compact applications[9]. In the other hand, the rectilinear channel designs exhibit a small-pressure drop, but the conversion is low due to uneven mass distribution and is affected by the Reynolds number while, the first exhibit a small pressure drop, uneven mass distribution cause lower conversion which impressed by Reynolds number[9]. Yet, by adjusting the channels width [69] or by imposing a pressure drop at the channels entrance even distributions on rectilinear channel designs can be obtained, improving the methanol conversion[10]. Conventional packed-bed reactor has disadvantages, such as hot spots, delays in start-up, and mass and heat transfer limitations. For micro-scale reactor, the pressure drop is somewhat higher due to space constraints of channels being blocked with catalysts. A micro-pump used in portable applications may not be capable of overcoming a high pressure drop. On the other hand, microchannel reactor offers advantages, such as fast heating and cooling, large surface-area-to volume ratios, and less energy input The packed-bed reactors as a classic system, have disadvantages, such as hot spot, slow start-up, and heat and mass transfer limitations. Micro-structure scale of this group utilizing a micro pump is necessary, due to high pressure and channel blockage [10]. Some research has shown that wall-coated reactor performs better than packed bed reactor for SRM reaction various researches has proofed better performance of the wall-coated than packed bed reactor for SRM reaction[11, 12]. Experimental Catalyst preparation Firstly, 200 ml deionized water was heated to 80Ãâ¹Ã
¡C and then metal nitrates of Cu, Zn and Fe (to prepare CuZnFe) were dissolved into the water until get the 0.2M solution. This solution was added to the heated water (80Ãâ¹Ã
¡C) over stirrer under 350 rpm. To control and adjust pH around 7, the precipitation agent of 0.5M Na2CO3 was used. The obtained precipitates were aged at 60 Ãâ¹Ã
¡C for 2 h under vigorous stirring. Afterward, the solids were filtered and washed with warm deionized water for several times and dried at 110 Ãâ¹Ã
¡C for 12 h. then, the dried powder was calcined in a furnace at 350 Ãâ¹Ã
¡C for 4h. Catalyst slurry preparation PVA (87-90% hydrolyzed, average mol wt 30,000-70,000,SIGMA-ALDRICH) was added to deionized water first, and stirred at 70 C until totally dissolved, then cooled at room temperature. As-synthesized, high-performance CuZnFe catalyst (10 wt.% catalyst) was added into the PVA solution (0.5 wt.%, 1 wt.%, 2 wt.% PVA) as-prepared. The catalyst slurry was kept in the ultrasonic bath for 1 h. Catalyst coating by electrophoretic deposition on stainless steel plates To prepare a regular, controlled catalytic layer, a well-stable suspensions of the catalyst powder are necessary which depend on the particle size, solvent characteristics and additional agents. To do this, the powder were milled to get a uniformity of particle size distribution below 40 micron, at least. Isopropanol was selected as solvent due to lower conductivity limiting solvent transportation than of the aqueous ones. Moreover, presence of aqueous base cause water electrolysis following poor coverage of catalyst. Electrophoretic deposition was performed at constant voltage (140 V) using a power supply unit (SPS-900NP-Navasanpardaz). The stainless steel (AISI-304) palates (7.04 cm2) were used as electrodes in the EPD bath. To cover both sides of the plate, a system including three electrodes was selected which, were mounted at a distance of 15 mm in a cell with a total volume of 120 ml. slurry of 72 g/L of catalyst in isopropanol and 1 g/L of PEI as binder was prepared through 15 min strongly stirring and then, 15 min signification in an ultrasonic bath (1200M-Soltec). The time of 4 min as coating time was fixed for all samples. After coating, the plates were dried in room temperature and then calcination at 350 C for 2 h. Method and materials According to the procedure in fig. 1, a series of CuZnFe slurries and samples were prepared. The synthesized powder was milled at 250 rpm for 10 min (due to initial fine powder structure short milling time was chosen) by a milling apparatus. It make a stable behavior of the slurry and homogenous final layer deposited. Results and Discussion After the coating procedure, the changing structure of the CuZnFe catalyst, the operating parameters and micro-channel characterization affect the efficiency of hydrogen in the output. In this study, explored a number of vital parameters characterization, including channeling arrangement and shape, coating methods and the efficiency of hydrogen production. Micro-Channeling Theory Design and micro-channel arrangement optimization cause select an appropriate structure limited by performance efficiency, constant cost like startup, Fabrication, and variable costs (Catalyst stability, coated layer quality, appropriate life time). Regardless of the constant costs, overall state and changing catalytic plates while the plates have been channelized, replacement and re-channelizing, coating procedure should be more difficult. Although, chein et. Al. [13] adopt three types reformer including the microchannel, the plain channel and the inserted catalyst layer while utilizing channeling over cover plate is different. All proposed structure of a square microchannel have been shown belowâ⬠¦Ã¢â¬ ¦Ã¢â¬ ¦. In this research, flexibility and replacing of an aged micro-reformer has been emphasized, an appropriate configuration with the minimum of fabrication cost through a recoverable coating procedure, minimum catalyst consuming and high efficiency has been adopted. A treated stainless steel as active layer was coated by the high efficiency CuZnFe catalyst which coated in an electrophoretic bath under a high controlling ability condition. The EPD producer will be discussed elsewhere, in detail. According to the optimum condition of a constant parameters, type of micro-channels, length and stability have been investigated. Reactor design The reactors were designed as flat-plate composed of stainless steel 304 plates. The microstructures were introduced by CNC technology. The both cover plate were machined to cover the active catalytic layer and increasing area to volume concept. The active layers were coated by home-made synthesized high efficiency steam reforming catalyst. Subsequently, the housing sealed by graphite gasket and bolts. The size and number of channels are summarized in table 1. Table 1.à Summary of the dimensions of the reactor: the channel dimensions are only provided for the reformate side of the plates Parallel channel Zig-zag channel Length(mm) Wide(mm) Depth(mm) Length(mm) Wide(mm) Depth(mm) The test plates and reformer design details are shown in fig. 1. On the top side of the cover plate, as shown in fig. 1(a), microchannel were patterned zig-zag path to reduce pressure drop along the path, holding high activity of the catalyst through the contact time increasing.(ref) the feed methanol-water mixture is sent to the vaporizer section including an inert alumina granule packed developing the heat transfer, and then, collected in an triangle manifold in the reformer inlet to obtain a more uniformly distributed flow. The design of the reformer channel (as shown in fig) leads splitting-jointing in an alternatively manner. In order to identify the reactant flow pattern effect on the reforming performance, the reformer channels shown in fig.1 were investigated. Catalyst coating The results of coating procedure, have been shown in fig 2. For all the plates, the same catalyst loading of 25mg was coated. Experimental setup A schematic diagram of the experimental setup is shown in fig. 3. The main components of the system are reactants, micro-reformer and products. To provide the heat of the reaction an electrical furnace was used controlled by a TIC. The feedstock system including methanol-water in liquid phase was sent by a syringe pump (model nnn) in a designed feed composition and determined S/C= 1.3 in all the tests. The reformed gas stream was then sent to a cold trap to eliminate the unreacted liquid phase. In continues, the rest of the gases was conducted to a gas chromatography equipped via two columns of carboxen and hysep Q (model shimadzu GC-8A). Based on the achieved fractions and compositions, the methanol conversion, CO selectivity, hydrogen yield and stability of the active layer cab be achieved. A K-type thermocouple connected at the end of the holes which designed to measure temperature of determined spots along the axis, default of the measurement is based on the central point of the reformer for all the tests. Results and Discussion 50 mm parallel microchannel Fig. 4 and fig. 5 display the performance of the microchannels according to the length. The investigation was performed under different temperature and micro channel types. It can be observed that the methanol conversion rates with various lengths is no different although the magnitude of this depends on the micro channel arrangement and for the direct parallel channels is more obvious. In the experiments, the effect of reaction temperature could overcome length and full conversion of methanol was achieved, finally. For the zig zag type, by variation in length in a range of 20 to 50 mm, no difference was observed. The arrangement cause more efficiency in reduction of surface to volume ratio. Actually the need of a sufficient contact time of the reactants on the catalytic active sites is necessary for a satisfying conversion. In the zag-zag type the contact time will increased and the at least of the sufficient length of full conversion is about 25mm. other lengths below those was not possible due to the limitation of the mass flow controller. On the other hand, being endothermic of MSR, the least requirement heat of reaction can be supplied by increasing of the contact time on the cover plate which is contacted to the heating source, consequently following the micro channel length. About the CO content, however, due to being full conversion in considered lengths, there is no significant different among the cases. Higher conversion can cause producing some more CO in the outlet. On the other hand, sufficient existing catalyst affect the CO production due to being active rWGS in lower loading of the catalyst. (ref). Zig-Zag microchannel Felani et al. [ ] proposed that a novel channel arrangement with a certain sizing could guarantee better flow distribution, higher contact time being accessible of reaction and heating, and lower pressure drop than those of conventional ones. The proposed model can increase the methanol conversion. Fig. 6 shows the illustration of the micro-reactor with such zig-zag microchannel. The performances of parallel microchannels and that of zig-zag microchannels are compared by the present experiment. The micro-reactor in this study is different from that of chein et al. [13]. In cheinââ¬â¢s paper, the reactor only has simple inserted plate without channelizing. It is noticed that in this experiment novel catalyst of CuZnFe has been used and the goal of this experiment is not the comparison of the cases. Advantages of easily replacing, lower costs of recoating and flexibility managing of the fuel processor. Fig. 7 shows the variation of the methanol conversion with the temperatures. It c an be found that with the increase of the temperature, the methanol conversion decrease. The conversion in zig-zag microchannels were higher than those in parallel microchannels. When the temperature is high, methanol conversion in zig-zag microchannels could be 20% higher than that in parallel microchannels. As mentioned before, zig-zag microchannels induce potential of providing more contact time to react under the help of catalysts, thereby enhancing the methanol conversion. Conclusions In this paper, the experiment of methanol steam reforming were performed in a micro-reformer coated with novel CuZnFe catalyst. The following conclusion can be achieved. 1. The impacts of reaction temperature, gas hourly space velocity, H2O-to-CH3OH molar ratio and catalyst stability were also investigated in this stainless micro-reformer. Condition selection of optimum operation can be achieved by these useful guidance. 2. Micro-reactor with two types microchannel arrangement, including zig-zag path and parallel microchannels, different lengths of 15, 30 and 60 mm were evaluated. It is found that methanol conversion in microchannels with zig-zag path are much higher than that of parallel path. In addition, since zig-zag path cause more contact time of the reactants on active sites of catalyst, there is no different of methanol conversion with length variation, while in the parallel path, it was obvious that higher length leads to more methanol conversion. References [1] D.R. Palo, R.A. Dagle, J.D. Holladay, Chemical Reviews 107 (2007) 3992-4021. [2] L. F Brown, International Journal of Hydrogen Energy 26 (2001) 381-397. [3] C. Liao, P.A. Erickson, International Journal of Hydrogen Energy 33 (2008) 1652-1660. [4] J.-H. Wee, Renewable and sustainable energy reviews 11 (2007) 1720-1738. [5] S. Bose, T. Kuila, T.X.H. Nguyen, N.H. Kim, K.-t. Lau, J.H. Lee, Progress in Polymer Science 36 (2011) 813-843. [6] R.Y. Chein, Y.C. Chen, Y.S. Lin, J. Chung, International Journal of Energy Research 36 (2012) 466-476. [7] A. Basile, A. Iulianelli, T. Longo, S. Liguori, M. De Falco, Membrane Reactors for Hydrogen Production Processes, Springer, 2011, pp. 21-55. [8] V. Hessel, S. Hardt, H. Là ¶we, Chemical micro process engineering: fundamentals, modelling and reactions, John Wiley Sons, 2006. [9] H. An, A. Li, A.P. Sasmito, J.C. Kurnia, S.V. Jangam, A.S. Mujumdar, Chemical Engineering Science 75 (2012) 85-95. [10] X. Ouyang, L. Bednarova, R. Besser, P. Ho, AIChE journal 51 (2005) 1758-1772. [11] A. Karim, J. Bravo, D. Gorm, T. Conant, A. Datye, Catalysis today 110 (2005) 86-91. [12] J. Bravo, A. Karim, T. Conant, G.P. Lopez, A. Datye, Chemical Engineering Journal 101 (2004) 113-121. [13] R.-Y. Chein, Y.-C. Chen, Y.-S. Lin, J. Chung, International Journal of Thermal Sciences 50 (2011) 1253-1262.
Friday, January 17, 2020
Psychology and the Importance in Churches Essay
I believe psychology is important in churches today because when I look at the attitude and conduct of church members, it exhibits the function of oneââ¬â¢s mind, social behavior and development. Specifically when dealing with the mechanics of reception. Religions and churches face different possible reactions from its members or visitors which are directly correlated to the human behavior of the mind. It is easy to see how the Muslims by their social behavior are so fanatical and often times all-consuming in their faith. Muslims are more inclined to say that their religion is an important part of their daily lives. It is said that nine out of ten Muslims said their faith was more important in their lives, while the figure was 85% for Hindus and 66% for Christians. We see that there are various levels of reaction; other religions could fall into the category of having strong and mild attachment, proving that the human mind is a key ingredient into how people react and consume religion. This not only plays a role in people with religious beliefs, itââ¬â¢s also displayed in non-believers of faith such as agnostics and atheist. This is so because religion will not have an impact on some individuals; they will be indifferent, having no particular interest or sympathy. While others may be observant, willing to learn but some will still be unmoved to come to faith or beliefs. These are just a few arguments as to why I feel psychology plays a pertinent role, because people that help make up all religions will have different reactions from their minds, thus leading to various behaviors and level of belief. Along with actions and reaction, the mind will also contemplate upon past experiences, this enables one to either come to faith or not at all, based on what someone had said or done to them. This is known as locking or unlocking the mind. In conclusion, Behaviors and reactions are a state of oneââ¬â¢s mind based upon life experiences. Psychology and the human mind play an intricate role in the growth or stunt of a Religion or a Church.
Thursday, January 9, 2020
My Favorite Web Site and Why Essay - 1467 Words
My Favorite Web Site and Why Some Works Cited Missing In contrast to most of the other people in this class, I had never done any net surfing. So to prepare for this paper I explored the WWW for approximately seven hours. This helped to create an impression on me of what constitutes a good Web site. Finally, I decided on a favorite SF/CP Web site and I asked myself what made this site better than others. The Web site is dedicated to William Gibson (Foley) site which scrolls a picture of the writer on the site projecting an air of authority. The problem with the William Gibson site is that the background does little to complement the site. The background for the BR site however, not only complements the title but helps project the moodâ⬠¦show more contentâ⬠¦If baffled to the nature of Bladerunner, a non-fan will imediately see that the table of contents contains a media bullet underwhich images, sounds, and video are provided. Simply a click on the mouse educates the non-fan and disproves the validity of the critics argument. To further aid the non-fan in investigating this site is its excel in fulfilling the second criteria of simplicity in style and organization. The home page is organized like a table of contents with 13 large bright colored bullets for each subject. Every dot (except one) is a link representing subjects that are direct and unconfusing. Every dot relates directly to the subject; Memorable Quotes (of Bladerunner)...Different Versions (of Bladerunner). Because of the table of contents format, the reader isnt forced to read through prose to understand the purpose of this site. When you click on Memorable quotes, for example, you are presented with just that: memorable quotes. Another example of organization can be found behind Whats New. It is organized with a list of dates that are enlarged and indented to differentiate between each other. This page is also simple in that instead of cluttering all the new information on this one page, links are provided for every date to help the viewer run through the dates more quickly. A good example of a site that is opposite to this one can be found at the The Cyberpunks Home Page (couldnt findShow MoreRelatedWordpress : A Website On Wordpress1049 Words à |à 5 Pages Whether you re just getting you business started and you are still learning how to improve your online presence or you have had a site for a while and you just aren t happy with it, you may have heard of WordPress and might be wondering what WordPress is. Simply put WordPress is a publishing platform used for building websites and blogs. It allows for a highly customizable user interface. 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Wednesday, January 1, 2020
The Successful Applications Of No Sql Databases - 1520 Words
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Monday, December 23, 2019
Argumentative Essay On Gun Violence - 751 Words
There are 30,000 gun related deaths per year by firearms, and this number is not disputed. U.S. population 324,059,091 as of Wednesday, June 22, 2016. Do the math: 0.000000925% of the population dies from gun related actions each year. Statistically speaking, this is insignificant! What is never told, however, is a breakdown of those 30,000 deaths, to put them in perspective as compared to other causes of death: â⬠¢ 65% of those deaths are by suicide which would never be prevented by gun laws â⬠¢ 15% are by law enforcement in the line of duty and justified â⬠¢ 17% are through criminal activity, gang and drug related or mentally ill persons ââ¬â gun violence â⬠¢ 3% are accidental discharge deaths So technically, gun violence is not 30,000â⬠¦show more contentâ⬠¦Ã¢â¬ ¢ 40,000+ die from a drug overdoseââ¬âTHERE IS NO EXCUSE FOR THAT! â⬠¢ 36,000 people die per year from the flu, far exceeding the criminal gun deaths â⬠¢ 34,000 people die per year in traffic fatalities(exceeding gun deaths even if you include suicide) Now it gets good: â⬠¢ 200,000+ people die each year (and growing) from preventable medical errors. You are safer in Chicago than when you are in a hospital! â⬠¢ 710,000 people die per year from heart disease. Itââ¬â¢s time to stop the double cheeseburgers! So what is the point? If Obama and the anti-gun movement focused their attention on heart disease, even a 10% decrease in cardiac deaths would save twice the number of lives annually of all gun-related deaths (including suicide, law enforcement, etc.). A 10% reduction in medical errors would be 66% of the total gun deaths or 4 times the number of criminal homicides......Simple, easily preventable 10% reductions! So you have to ask yourself, in the grand scheme of things, why the focus on guns? Its pretty simple.: Taking away guns gives control to governments. The founders of this nation knew that regardless of the form of government, those in power may become corrupt and seek to rule as the British did by trying to disarm the populace of the colonies. It is not difficult to understand that a disarmed populace is a controlled populace. Thus, the second amendment was proudly and boldly included in the U.S. Constitution. It must be preserved atShow MoreRelatedArgumentative Essay On Gun Violence759 Words à |à 4 Pages Upon reading the article, ââ¬Å"What If We Treated Gun Violence Like A Public Health Crisis?â⬠and watching the news every now and then, there are many major tragedies surrounding around us. It is absolutely scary, and only seems to be getting worse. The article starts off with the statement that, ââ¬Å"More than 30,000 people a year are killed by gun violence,â⬠making it clear just how serious the situation pertaining gun violence is (Kodjak, 2017, p. 1). Yet, this statistic does not even take into considerationRead MoreArgumentative Essay the Right to Bear Arms1159 Words à |à 5 PagesUNIVERSIDAD DEL TURABO NAGUABO, PUERTO RICO ARGUMENTATIVE ESSAY FINAL HOMEWORK LURDES M. PEREZ S00604108 PROF. 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Sunday, December 15, 2019
Extreme Sports Free Essays
Extreme Sports Frist path ââ¬âaround 1 minute 1. Introduce: Hi, I am Sharon, today my presentationââ¬â¢s topic is extreme sports. Is anyone playing extreme sports? 2. We will write a custom essay sample on Extreme Sports or any similar topic only for you Order Now Thesis: For leisure life, extreme sports is a good choice for people who want to the pursuit of stimulation. Extreme sports not only give people a chance to release the pressure in the natural world, but also is a way to challenge themself and become stronger. Second path ââ¬â around 8 minutes 1. The reason had extreme sports: ââ¬â around 1~2 minutes Today, facing increasingly cruel competition of society, human life rhythm is becoming more and more fast, working pressure is more and more high and the life space more and more small. Reality environment makes modern people overwhelmed and constant, increasing the stimulation and make the person feel domain limit also enhance unceasingly. General sports cannot meet the pursuit of human mental stimulation. . Definition and the type of extreme sports: ââ¬â-around1~2 minutes Extreme sports is a popular term for certain activities perceived as having a high level of inherent danger. Because of extreme sports is more like outdoor sports, the playing area would be sky, water and land. There have many type of extreme sports, such as bungee jumping, rock climbing, snowboarding, cave diving, auto racing, water ride, flowboarding and Parkour. 3. Motivation: (each motivation will come with image) ââ¬âaround 2~3 minutes Enjoy nature (ex. get close with nature word, escape crowds and noise) Reduce tension (ex. Tension release, slow down mentally and escape and daily routines. ) Challenge self (ex. physiological and psychological) Meet new people and share similar values 4. Show a video ââ¬â around 2 minutes 5. Take a risk: ââ¬â around 1 minutes As you see, extreme sports is a challenging sports. And it belong to the adventurer. Because extreme sports is a dangerous sports, people who played extreme sports only live for the thrill of the moment without a thought of the many things that could go wrong. Third path ( around 1 minute) Conclusion: Extreme sports not only can help people escape daily routines and release the pressure, but also can make people stronger in the self-confidence and healthier in the body. However, when you try a extreme sports you have to pay attention and take care yourself. (End of this presentation) Thanks This the presentation will use power point. How to cite Extreme Sports, Papers
Saturday, December 7, 2019
Deferred Action For Childhood Arrivals Example For Students
Deferred Action For Childhood Arrivals Deferred Action for Childhood Arrivals (DACA) is an executive order signed by President Obama in June 2012. DACA is a federal immigration policy that concerns illegal, undocumented immigrants that have that arrived in the United States prior to their 16th birthday, have been in the country since June 2007, and are under the age of 31 years old. Under DACA, eligible individuals are permitted to receive a renewable work permit, lasting two years, and to be exempt from deportationââ¬âunder the condition that these individuals are lawful and either attending an educational institution, a high school graduate or currently serving or honorably discharged from the military. The policy does not officially allow for these immigrants to become American citizens. However, this policy protects immigrants that did not come to the United States under their own free will as children. Problem identification: In 2012, there was a large social movement from Latino organizations such as, the League of United Latin American Citizens, the Hispanic Federation, the Labor Council for Latin American Advancement, and the Mexican American Legal Defense and Education Fund. A growing social movement was also developing among young Latinos, forming the groups like United We Dream. The DREAM movement consisted of protesters advocating for their rights as immigrant students. These students called themselves DREAMersââ¬âwhich, stems from the DREAM Act (Development, Relief, and Education for Alien Minors). The DREAM Act is a legislative bill that was first introduced in Congress in 2001. However, Congress was never able to pass this bill, despite multiple reforms made over the past decade. The DREAM Act s main goal was to protect the rights of immigrant students in the United States by allowing conditional residency and eventually permanent residency. It was also established on the argument that these individuals are law-abiding students that did not come to the United States under their own free will. Proponents of the DREAM Act argued that Immigration Enforcement should not focus deportation efforts on young people who are contributing to society either through the means of education or military service. DREAMers of the Campaign for an American DREAM group participated in various forms of civil protest throughout the United States. In June 2012, DREAM protesters arrived at President Obamaââ¬â¢s local campaign headquarters in Denver, Colorado and requested an executive order by the current President to protect illegal, immigrant studentsââ¬âin this instance, some of the protesters initiated a sit-in protest. Other protests that pressed for rights of young Latinos included the Trail of Dreams, a 1,500-mile march from Miami, Florida, to the White House. Anderson (2013) describes a policy problem as, ââ¬Å"â⬠¦a condition or situation that produces needs or dissatisfaction among people and for which relief or redress by governmental action is soughtâ⬠(p. 82). Thus, problems must be recognized and understood by policy-makers. In the case of DACA, the protests of DREAMers fostered the issue of immigrant rights to the President. Another aspect of problem identification was the consideration of what populations would be affected by DACA. It is evident that California holds a significant percentage of potential DACA recipients; thus, had already established their form of the legal protection for illegal youths called CAL DREAM Act. California passed this state policy in 2011, previous to the signing of DACA. Under the CAL DREAM Act, minors that arrived in the United States before turning 16 years old were permitted to receive student financial aid. California had addressed the problem of immigration rights before the federal executive order was passed as DACA. Furthermore, the Pew Hispanic Research Center, a branch of Pew Research Center estimated that 1.7 million individuals, as of August 2012, would be potentially eligible nationally to apply for protection under DACA. Additionally, 85% of the 1.7 million DACA beneficiaries are Latino (Pew Research Center, 2012). .ucc237db11201125f865c4e87e79ac6a2 , .ucc237db11201125f865c4e87e79ac6a2 .postImageUrl , .ucc237db11201125f865c4e87e79ac6a2 .centered-text-area { min-height: 80px; position: relative; } .ucc237db11201125f865c4e87e79ac6a2 , .ucc237db11201125f865c4e87e79ac6a2:hover , .ucc237db11201125f865c4e87e79ac6a2:visited , .ucc237db11201125f865c4e87e79ac6a2:active { border:0!important; } .ucc237db11201125f865c4e87e79ac6a2 .clearfix:after { content: ""; display: table; clear: both; } .ucc237db11201125f865c4e87e79ac6a2 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .ucc237db11201125f865c4e87e79ac6a2:active , .ucc237db11201125f865c4e87e79ac6a2:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .ucc237db11201125f865c4e87e79ac6a2 .centered-text-area { width: 100%; position: relative ; } .ucc237db11201125f865c4e87e79ac6a2 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .ucc237db11201125f865c4e87e79ac6a2 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .ucc237db11201125f865c4e87e79ac6a2 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .ucc237db11201125f865c4e87e79ac6a2:hover .ctaButton { background-color: #34495E!important; } .ucc237db11201125f865c4e87e79ac6a2 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .ucc237db11201125f865c4e87e79ac6a2 .ucc237db11201125f865c4e87e79ac6a2-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .ucc237db11201125f865c4e87e79ac6a2:after { content: ""; display: block; clear: both; } READ: Illegal Immigrants Have Migrated Into Theu.s For Many YearsAgenda Setting: DACA can be understood through Kingdon s policy window theory. The policy window of opportunity allows for certain issues to progress onto policy agenda. Kingdon (1995, p. 152-153): details the convergence of the three streams (problems, proposals, and politics) that produces a policy opportunity: Advocates of a new policy initiative not only take advantage of politically propitious moments but also claim that their proposal is a solution to a pressing problem. Likewise, entrepreneurs concerned about a particular problem search for solutions in the policy stream to couple to their problems, then try to take advantage of political receptivity at certain points in time to push the package of problem and solution. The three components must congregate in order to allow policy to be pushed onto political agendas. But, as Kingdon further illustrates, all three aspects exploit each other throughout this policy window, which in the end benefits all three key players. The first aspect of Kingdonââ¬â¢s policy window theory is the problems. In the case of DACA, the problem of immigrant rightsââ¬âespecially those of young students had been made active to the public and media through social protest. Kingdon explains how policy-makers perceive problemsââ¬âand one such method is through feedback. The DREAM protests offered a form of feedback to elected officials, specifically President Obama, that illustrated that a large group of individuals were unsatisfied with current conditions. Moreover, Anderson (2013) demonstrates how government only addresses a problem if there is a solution. Thus, another component of the policy window theory is the proposals. Preceding DACA, there was already proposed policy through the DREAM Act. The DREAM Act had first been adopted in 2001. DACA and the DREAM Act are exceedingly similar in natureââ¬âboth tackle the rights of undocumented, immigrant youths. There are only minute differences between the two policies. The DREAM Act was ultimately the foundation to DACAââ¬âwith the DREAM Act as a proposed legislative bill of Congress that failed to pass, thus, eventually led to DACA, an executive order by the President. The DREAM Act was an institutional agenda of Congress, as a legislative bill; however, when it was unsuccessful the policy proposal was then shifted onto another institutional agenda, that of the executive branch with DACA. The policy proposal had already been well established when it reached President Obama. As K ingdon argues proposals are often at the ready but remain dormant until problems are identified and political aspects are addressed. How solvable is this Not really addressing the cause of the issueâ⬠¦ Politics is the final aspect of Kingdon s policy window theory. President Obama signed DACA in June 2012ââ¬âthe summer before the November Presidential election. As incumbent, President Obama, was up for re-election, it could be argued that he decided to sign DACA in order to receive acknowledgement that he supported efforts made by the young Latino protesters and Latino organizations. The Pew Research Center in December 2011, found that 91% of Latinos in the United States supported the DREAM Act. Consequently, President Obama had motives to ensure Latino votes for the upcoming election. The New York Times (2012) writes, ââ¬Å"The president was facing growing pressure from Latino leaders and Democrats who warned that because of his harsh immigration enforcement, his support was lagging among Latinos who could be crucial voters in his race for re-election.â⬠Although, an executive order does not guarantee permanency, President Obama called it the ââ¬Å"first stepâ⬠dur ing the announcement of DACA. During this time, public protests were increasing, but it can be argued that these Latino groups also knew that President Obama would more likely enact a policy during his re-election campaign season. There is strong evidence to illustrate that there were multiple conditions that eventually led to the signing of DACA. Protesters understood this was an opportune time to encourage President Obama during his campaign, as it was comprehended that he wanted the Latino votes. President Obama understood that he needed to formally address this impeding issue if he wanted to secure his executive position. Furthermore, the already established proposals addressing this problem, made the formulation of DACA easier to pass.
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