kingdom of matthias Essay Example for Free

kingdom of matthias EssayStarting in the early 1600s English settlers began migrating to the Americas in search for liberty and the make up to reign themselves in what they deemed a Christian manner. Thomas Morton, was one of the first to write about the Indians of New England. He condemned their ghostly beliefs phone c altogethering it was similar to devil like worship. (VOF,4) The intrinsic Ameri foundations were seen to be living a much happier life even without religion, law and a king. This daunted Christian and they did not understand how this could be. Its written that they claim their prosperity was full of evil and they would lead a happier life once bought to Christianity.(VOF,6) I live this is the last America sees of true religious freedom. In reality, religious liberty existed in very few parts of the Atlantic world in during this time period. Most nations outlawed religious groups that rulers deems dangerous or disruptive. Among all the colonies, one that de monstrated religious freedom in a higher sense would be Maryland.Cecilius Calvert was a Catholic who wished to demonstrate that Protestants and Catholics could live in peace, something that was not seen in Europe. In 1649 Maryland established an Act Concerning Religion, which introduced religious tolerance, saying that anyone who troubled a Christian due to their religion would be punished.(VOF,27) I feel this allowed others to safely demonstrate religious freedom, but this is just one state among the colonies. During this time it was rare to have this type of true freedom. Like some settlers, the puritans came to American in search of liberty, and to govern themselves in what they deemed a Christian manner.(VOF,29) This is where Religious freedom loses the sense of freedom, because the puritans created their own definition of the word freedom. John Winthrop explains that freedom to them meant obedience to Gods laws and the law of rulers much(prenominal) as himself.(VOF,29-30) Bas ically you can see that they are imposing their moral standards on society as a whole, denying anyone other than themselves of true religious freedom.Unlike what Maryland was trying to implement, this colony believed in delineate their religion, or be punished, much like a wide array of colonies. A prime example of this would be the trial of Anne Hutchison in 1637. Hutchison was accused of expressing opinions that did not match up to those in authority.(VOF,33) The trial gives examples of how if you regorge against what the government deems Gods word, then you would be punished. Hutchison argues that she is reciting what she believes God toldher is his word, and Governor John Winthrop, one of her accusers, argues that this is another religion and its punishable. (VOF,35-39) Because Hutchison followed her own beliefs she is banished from their society, clearly being stripped of her natural right of religious freedom.Based on examples like this, what religious freedom really meant w as, do as I say or be punished. You can see this start to shift as time goes on, you can see people start to realize the damage this is putting on society and settlers, such as Roger Williams, begin to branch out and start new movement. Williams founded Providence, Rhode Island, and then came to publish a letter claiming that no one should be forced to follow any particular religious belief, but they should still obey the government in charge of civil matters. (VOF,40) This is what religious freedom should have been from the beginning.

Organising Learning Essay Example for Free

Organising Learning EssayFurthermore, a nonher area of concern for me is managing behaviour in the classroom. In my opinion, managing behaviour is a partnership in the midst of the instructor and the chelaren. The teacher must be the authority figure in the classroom. I tactile property this is achieved once trust and respect is formed. Once routine is larn and the children know what is expected from them, a lot of pressure is taken off the teacher. In school, the children were constantly encouraged to put their hands up. If they c wholeed out the teacher would do quickly and ask them to put their hand up. Therefore, I build found that unwanted behaviour should either be ignored or dealt with rapidly to bring low further problems. It is they teachers responsibility to decide how to handle a situation. The school has a behaviour policy which the whole school follows.I feel this is a expensive document and offers guidelines to handling ch exclusivelyenging behaviour. The t eacher uses smiley or sad faces on the board as a management strategy. In my whole school father only saw three sad faces which was amazing. The Overall behaviour of the children was very good as the teacher used praise, smiley faces, well done points and stickers on a regular basis to encourage good behaviour. The children thought very highly of the teacher and tried hard to please her. I tried to use the teachers classroom management strategies as the children were familiar with them and the children responded to the in a positive wing the very lucky teaching the class as they showed a genuine reside in my lesson and behaved extremely well for me.I feel this was because I tried to make it interesting. I tried to pitch the lesson to their level so they could relate it to their experiences. conflict the selects of individual children is a constant challenge. Some children may need individual help all the time and there are some children who have special educational needs. There fore, there needs must be planned for and a lot of praise and encouragement is needed to reward their progress, so they dont feel excluded from the rest of the class. I believe this is extremely important an effectual teacher must be able to meet the individual needs of every child in the classroom.At university I particularly enjoy science and English lectures. The tutors are friendly and approachable which I feel is because they make sure we all understand the lesson. They quickly recognise if any students are struggling with their work and offer different methods of learning. I feel comfortable participating in these lessons as I feel quite confident in the subject. These tutors too give us the opportunity to discuss our thoughts and ideas with each other which I also moot is an effective method of learning.I have also found that assessment is a springy part of teaching and this is an area of concern for me. It is especially vital to assess children at the end of each key sta ge to provide an individual report they can take with them, which highlight their strengths and possible growth points. Although a teacher will know what level their pupils are at, it is now important to have evidence to support their judgmentsDuring my school placement I observed the teacher assessing the children on a regular basis. Questioning the children is an effective method to establish what level the children are at, this is accomplished in an informal manner and the children are not pressured.The teacher built on the results of the assessment during teaching and addressed any misconceptions which the children may have. Another method of testing was seen at the end of each topic, the children answered questions on a worksheet which provided physical evidence to support the teachers judgment. Sometimes check-lists can be used for smaller groups during some activities which have been planned for assessment.I observed category one and year three and upper key stage two. I saw the same behaviour management in all the classes. Year six children were given more responsibility over their time management and behaviour as the expectations were shared with them from the beginning. Year six did not sit on the carpet, all teaching took place at their tables. It helped to see how the children progress and the NNS and NLS is a valuable document which tells teachers how to develop the childrens learning.I am concerned about becoming an effective teacher, and it is vital that all teachers should recognize their strengths and weaknesses. They should reflect on previous lessons and be able to set targets. I feel that teaching is an occupation where the teachers are also learning alongside the children. Sometimes lessons may not go as well as we anticipate or sometimes they may be bankrupt than previously thought. All this should be recorded by evaluating our progress after each day and building on our professional development. It is crucial to act upon areas which ne ed improvement.In conclusion, I have highlighted my concerns of becoming an effective teacher. I have included possible ways to improve areas such as classroom management and behaviour. I have also included my school observations for examples of the teacher giving and receiving respect from the children. I have also included forms of assessment and self reproach which are crucial aspects of teaching. In my opinion, teaching is not simply a career, it becomes part of your life. A creative and stimulating teacher would gain great ad hominem satisfaction from this profession and my school placement has confirmed my desires of becoming an effective classroom teacher. It is important for a teacher to be happy, organised and enthusiastic in school, knowing that they are making a difference to a childs future.BibliographyCollis, M. Lacey, P. (1996), Interactive Approaches To Teaching, London, David Fulton.Dean, J. (2001), Organising Learning in the Primary Classroom, Third Edition, Londo n, RoutledgeFalmer.Edwards, D. Mercer, N. (1987), Common Knowledge, London, Methuen

Pestle Analysis Of Vietnam

Pestle Analysis Of VietnamKnowledge astir(predicate) PESTLE result and deliverations prior to the classI understand that BE refers to external factors and that enterprises cast off to take into account to their strategic and operational be after processes for conquest. My business requires a close understanding of the BE elements that may create opportunities or threats to rural SMEs for the development of interventions to BE improvements. I as well know that a good enabling BE will create competitive advantages of a country and interest to foreign investors for sparing emersion. I know how to use SWOT bill to stakeholders analysis. My understanding about PESTLE1factors is all about Vietnam only, below be summaries of my knowledge prior to the class.For politics, Vietnam is adopting a mixed economy and government still plays a big comp unitynt part in planning and governing and many countries do not recognise the market economy for Vietnam yet2even its WTO adhesion sin ce January 2006. The approved official documents of the eleventh National Party Congress clearly stipulate that Vietnam continues to apply the market economy with heartyist orientation, and the State Owned Enterprises (SOEs) still play the decisive roles of Vietnam economy. This may break the enabling BE and create threats to nonpublic SMEs.For scotchs, Vietnam maintains a st open and superior economic growth (7% in average for the last decade). Local enterprises are facing up to challenges in access to expensive credit and financial management due to noble inflation (9-11%), high interest rates of parsimoniousness (13-17%/year), and to currency devaluation (three times in 2010)3.For social factor, Vietnam has a young population with 46% of population are in working age and around 1 million new entrants into labour market severally year, but overall productivity remained extremely low and is only three-fifths the ASEAN average or around ten percent the level in Singapore4. V ietnam is the only country in Asia to enter Top 5 of the 2009 Happy Planet Index (HPI), announced by the stark naked Economics Foundation (NFF) in July 2009. Vietnamese peoples are very optimistic to their future thanks to stable political regime, peace and economic growth.For technical factor, motive shortage is now very current with increasing demand internet is widely accessible with reasonable price counterfeit and imitation, e superfluously in bundle products, are widespread in Vietnam.For Legal factor, Vietnam has available Enterprise Law, Investment Law and other spheric and regional agreements (WTO, ASEAN, APEC), in theory, all kind of enterprises (SOEs, private enterprises, joint ventures) have to play the game with the same rules, but in practice, the implementation of Laws is a real challenge due to poor quality of pitying resource in public service and corruption issues (116/178 ranked countries)5.For Environmental factor, Vietnam has a long coastal border (2500km) and is considered as one of the most under fire(predicate) countries due to natural disaster risks, climate change and sea level rise. Enterprises in Vietnam have to take seriously into account the environmental factors to their business planning and operating processes. Vietnamese peoples do not tolerate easily to business practices that harm to environment. For example, the Vedan Vietnam Limited JSC, a wholly Taiwanese-invested firm has to pay a high cost for its pollution to Thi Vai River, the Coop Mart Supermarket System and retailers refused to sell Vedan products, promotional activities encourage the clients to say NO with Vedan and the company is facing to bankruptcy in 2007-2009.My consultancy function computer backup rural SMEs to access to opportunities and to prepare for threats. I also work with government authorities to improve BE for SME development, includingEntrepreneurship Education. This intervention are to improve the entrepreneurship knowledge and skills to th e youths, to develop their entrepreneurship mind set and finally to prepare them working oil-bearingly in enterprises.Public-Private Policy Partnership and Dialogue (PPD). These forums are to reflect on the PCI6 results and to critically debate on BE improvements, administrative reforms and BDS supports in favour to SME development.Making Market Works Better For the Poor. Such as business management culture to business people in remote areas, the value chain analysis and upgrade in favour to poor producers, support for collaboration and coordination among poor producers for their greater bargaining power.Recently, I have created my own enterprise named Initiatives and Informal Education Promotion Company, called as IIE Vietnam and I work as the company Director, providing technical consultancy work to national and planetary organizations working in the area of local socio-economic development. My expectations from the class are about the comprehensive academic approaches and too ls for PESTLE analysis. I wish to be able conduct stakeholders analysis, the scenarios planning, taking into account of PESTLE issues in order to improve my business. I also wish to have a broader understanding to global BE, especially the good enabling BE of EU countries, USA, Japan, the improving BE in major BRIC emerging countries and the beat out BE in Africa, Cuba, Venezuela. I expect to be able to identify and explain BE context in those economies.Key learned ideas from this sessionOrganisational Form and Purpose. There are different types of organisations each of these organisations has its relative vision, mandates, values, advantages, disadvantages and stakeholders. When making strategic decisions about the organizations direction and scope, managers need to examine the organizational purpose, vision and stakeholders expectation for the future. Managers have to make sure that commercial organisations should be high accountable to the owners first, then that conflicts and d ifferent expectations from organizational stakeholders are properly responded. I am able to use the power/interest approach and tool for stakeholders mapping and analysis of my own company.Understanding the Managerial Environment. Managers will need to evaluate the current context and trends of BE for organisational strategic planning and operating, it includes the evaluation of local, regional political stability, government commitment to business, main economic indexes, labour force, technological development and availability, legal documents and finally environmental issues affecting business. With the results of BE analysis, managers are able to identify main opportunities and threats of their company. I am able to interpret the PESTLE framework for identifying, evaluating the impacts of key external environmental factors and developing 2011 scenarios to my own business.The Economy and the character of authorities. The Circular Flow of Income describes the operations of an eco nomy the consumers provide resources to firms for income, firms produce goods and services to consumers for margin, income and margin are used to pay living and operating costs, taxes for government spending, investment fundss for productive capacity, technological development and savings. Government plays the role of policy maker and referee, ensuring the achievement of economic and social goals of a society, including high rate of decent employment, stable economic growth, low rate of inflation, trade surplus. Government use fiscal policy (taxes and public spending) and monetary policy (money supply and interest rates) as major tools of macro-economic management. pecuniary policy is a tool for managing demand, if government wants to accession the demand, it may reduce taxes and/or increase spending, if it wants to reduce the demand, it will do the opposite. Government has lot challenges in achieving simultaneously all the economic goals, an increase in demand may create high inf lation. Government also use monetary policy for macro-economic management, an increase in interest rates will increase saving, reduce consumption and reduce investment spending, and thus reduce inflation. The interest rates affect alter rates and banks/investors will spent their energy and efforts just to trade the money and not the product.The European Environment. The rationale of reduction in trade barriers and mobility restrictions is for costumers rights protection, competitive and technological enhancement. The main benefits for countries in joining EU include access to a largest and beauteously competitive market, with safe and predictive BE, well established infrastructure, social protection, education, search and development. The main challenges for EU enlargement includes different educational, technological, cultural, infrastructural and competitive level between countries, politics, human rights issues, especially the legacy of the Soviet economy. United Kingdom, Swi tzerland are considering their EMU segment due to negative factors such as economic cycle, sovereignty issues, unique values, transition and employment costs.Understanding the Global Environment. Globalisation is an inevitable trend of the conception thanks to the development of ITC and education, to which countries and firms have to duel for success. The key globalisation drivers include politics, economics, market, costs and competition. Globalisation is bringing both opportunities and challenges to peoples. For competitive advantages in the global market, countries have to increase their political and social connections between peoples and states firms need a good assessment of global costs. Globalisation allows firms not only to profit of better issue factors, but also to gain market share and/or to access to growing market. Managers need to have strategic decisions on whether outsourcings, offshorings or insourcings for cost advantages. Government policy makers have to ensur e the reasonable inequalities between rich and poor, the control of dominance and monopoly of biggest global firms, cultural degradation, global dependence and global crime.Emerging Countries in Three Continents. The Japanese MITI with selective industrial policies, the keiretsu with alliance of firms with banks, manufacturers, suppliers, distributors and with the Japanese government, the kaizen with continuous improvement or change for success, the kanban with scheduling system, have created the economic and technical success of Japan in 1980s. The reforms with special economic zones, the gradual opening of economy, the calls and government supports to FDI have transformed China from a backward agricultural economy to the run-in major manufacturing centre in 1990s, but the political regime and human right abuse in China is not appreciated by the international communities, and the world is facing up to social and environment costs with rapid expansion due to poor governance of soci al and environmental responsibilities. The replacement of interventionist economic policy by the liberal economic reforms together with the good investment in high-tech education and research have made India become a modern economy, the rapid economic growth in a complex cultural legacy and Hindu caste system is also creating lot of social issues in India, including poverty, illiteracy, HIV/AIDS. The ASEAN with its regional cooperation, cultural diversify, high level of general and scientific education, high saving and investment ratios, young and dynamic population, rapid growth of technology, openness with interventionist industrial policies, is creating a high interest of international investors and politicians (10 Primer Ministers of ASEAN, plus Australia, China, India, Japan, New Zealand, S-Korea and Foreign Ministers of USA, Russia, and UN General Sectary participated in 2010 Hanoi due east Asia Summit, 500 big local and international firms jointed the 2010 Hanoi ASEAN-BiZ Su mmit Conference)7. Even with rich natural resources, but the dependence on agricultural doing and exports, the negative impacts of slavery, colonisation and socialism, the predominance of authoritarian regimes, poor access to education, public services, sanitation, water, poor governance with corruption, inefficient politicians, ineffective international development assistance and loans, rebellious internal rules, conflicts, diseases have left most African countries at the mercy of the world markets.Market Structures and Industry Analysis. Monopolists are able to control both production and purchase rights. In a high competitive market, specialism and location allow operators control over price. In the oligopoly market, competition of non-price methods such as ad and sales promotion is appropriate. But the greater competition makes companies more efficient and the consumer has a bigger choice of good and services, policy makers have to build rules for fair competitiveness and ant i-monopolistic competition. I am able to interpret the Porters Five Forces (current competitors, new entrants, buyers power, substitutes, and suppliers power) to market and competitive analysis of my business. The results will be used to defining and view my business, including the development and implementation of key success factors.Delivering Customer Value and Managing Marketing Performance. Firms need an appropriate targeting strategy due to different needs of customers. Customer class allows firms to critically analyse characteristics of customer groups for the provision of relevant services and goods. Appropriate promotions with segmentation approach help firms not only to save costs, but also to provide desirable products and enjoyable prices. A good understanding of existing and electromotive force markets through assessing current and potential market attractiveness, evaluating company and competitors current and potential strengths and weaknesses in serving a particula r market, allow firm to take competitive advantages. Company brands are built from knowledge, esteem, relevance and differentiation. I am apply the gained knowledge from these sessions to develop my business strategy with demand-driven and non-price competitive approaches such as owner branding, expertise enhancing, attitude improving for differentiation and success.Making sense of Uncertainty. In a stable BE, forecasting works well to develop company future directions, but peoples are living in a fast ever-changing environment with many unpredictable events scenarios building is good tool to manage uncertainty. Scenarios building should be credible and includes PEST analysis. Companies need to build more than one scenario with both optimistic and pessimistic context to predetermine a list of trends and key success factors.Difficult concepts and Improvement planScenarios building, Brands building are cardinal most difficult concepts with me, my improvement plan includesFurther rea ding Due to time constraints for both learning and working activities, annual review and planning processes, I havent much time to do extra reading of suggested documents from the class I planned time for further reading after Lunar New Year. more exchanges with colleagues, friends and experts Informal discussions, exchanges through emails, chats with them will enable me to gain more knowledge.Participation in short and intensive workshops The VCCI is organising short and intensive workshops on scenarios and brands building to support the entrepreneurs of SMEs, I will register for my participation to knowledge improvement.Learning from doing my works. I am the owner cum director of my small company I am building scenarios and brands to my company and will learn from both success and failure.Extra reading and key learning points.I have visited the http//www.forbes.com and read the summary of the special report named Best countries for wrinkle 2009, published at http//vneconomy.vn a nd have drawn the following key learning pointsVietnam dropped from number 113 to 118 in 2009 list of Best Countries for Business. Due to its weak export capacity, high trade deficit, weak protection of foreign investors.Denmark was ranked as the best place to do business. Thanks to its high per capita (36.000 USD/year), surplus trade (+2,9%), good ratio of public debt/GDP (41,6%).The US saw the biggest fall in 2009 ranking, falling to number 9 from the second prospect in 2008. Due to long-term issues such as lack of investment in infrastructure, increase of costs in health and retirement, high trade deficit.Venezuela is the worst country. Due to its robbery (nationalisation) of foreign firms.The top 10 of weakest countries of 2009 business environment are in Africa. Due to poor governance, abuse of human rights and democracy, poor investment in education, pubic services, basic human needs and imperviousness of international values.AnnexesReference sourcesMuch above information is summarised from the follow sourcesHarrison A., Business Environment in a global context, Oxford University Press, 2010, New York, USAUniversity of Gloucestershire Business School, Global Organizational Environment handouts

The History of Aluminum

The History of atomic number 13Aluminum is the thirteenth agent on the periodic element and its in the thirteenth roll (Dynamic.) Aluminum was discovered by Hans Christian Oersted in 1825 in Denmark. Hans Christian Oersted born on August 14, 1777 in Langeland, Denmark. He became interested in Chemistry at age twelve while working at his fathers pharmacy. Not only was Oersted the first to extract aluminum from rocks, but he also discovered electromagnetism (Home.) The aluminum word derived from the Latin word alumen meaning alum.Aluminum is the most common metal found in Earths crust (Home.) They obtained it from ores a surface near the surface of the earth. At that time, aluminum was worth a lot of money and was more invaluable than gold (Winter,M.) Aluminum is also found in the Earths crust, rocks, clay, soil, and vegetation. Hans-Christian was the first to produce nodules of aluminum by heating potassium amalgam with aluminum (AzoM,.) Hans Christian Oersted produced aluminum by lessen aluminum chloride with a potassium-mercury amalgam (Home.) This experiment was difficult to do because all naturally occurring aluminum exists in a bonded state with other alloys, elements, and substances, making it wily to discovery and produce (How.)When aluminum was discovered, the Greek and Romans used it in making medicines and when dyeing fabrics. When it was first discovered, it was worth $1,200 per kilogram in the nineteenth century, thats more valuable than a bar of gold. Thats $28,383 in todays money (How.) When aluminum was worth more than gold, it was used for making jewelry and art objects. During this time, aluminum was considered an elite material. Aluminum was resembling the gold and silver of the 1850s. It was used to make many necklaces, bracelets, earrings, and silverware used for special guests.The process that allowed aluminum to be produced at low costs was called electrolysis. This technique ran change state aluminum ore through a bath of liquid wh ile it was electrified. When the dissolved aluminum ore molecules were shocked, small gray nuggets were collected. Soon after this process became known, many factories were built for the purpose of isolating and selling aluminum. The United States went from producing a couple of ounces of aluminum per month to producing around fifty pounds of aluminum per day (Kean,S.)Today, aluminum isnt worth the uniform as gold or silver. Because it is now mass produced, the value of aluminum has drastically declined. Today, aluminum is used for basic things like soda cans, retards, kitchen utensils, and airplane part (Google.) Aluminum foil is produced today by extracting impurities, like oxide, silica, titania, and water, then the aluminum oxide is melted and made into pure aluminum. After that, the pure aluminum is rolled into foil (Aluminum.)Works CitedAZoM, W. B. (2013, June 11). Aluminium, The History, Discovery and Development as a Product. Retrieved knock against 15, 2017, from http/ /www.azom.com/article.aspx?ArticleID=1530Dynamic Periodic Table. (2008, November 18). Retrieved March 16, 2017, from http//www.ptable.com/Google. (2014, October 23). Retrieved March 16, 2017, from https//www.google.com/q=what is aluminum used for today*spf=611History of Aluminum. (2017, March 09). Retrieved March 15, 2017, from http//www.aluminum.org/aluminum-advantage/history-aluminumHome. (2009, May 03). Retrieved March 16, 2017, from https//www.famousscientists.org/hans-christian-oersted/How did Hans Christian Oersted discover aluminum? (2013, October 13). Retrieved March 16, 2017, from https//www.reference.com/beauty-fashion/did-hans-christian-oersted-discover-aluminum-71fc26839514883cKean, S. (2010, July 30). Aluminum It Used To Be More Precious Than Gold. Retrieved March 16, 2017, from http//www.slate.com/articles/health_and_science/elements/features/2010/blogging_the_periodic_table/aluminum_it_used_to_be_more_precious_than_gold.htmlWinter, M. (2008, July 12). Aluminium histo rical information. Retrieved March 15, 2017, from https//www.webelements.com/aluminium/history.html

PSA Composite Fibers and Membranes

prostate specific antigen Composite Fibers and MembranesPolysulfonamide/nano titanium dioxide (prostate specific antigen/nano-TiO2) intricate spinning solutions with various nano-TiO2 portion fractions were fain apply the solution portmanteau word method. The corresponding intricate roles were developed by wet-spinning technology and the building complex membranes were prep atomic number 18d using the digital spin-coating technique. The properties of prostate specific antigen/nano-TiO2 obscure fibers and membranes were investigated by s rumpning electronmicroscope, Fourier transform infrared emission spectroscopy and X-ray diffraction, etc. The effects of nano-TiO2 and its push-down store fractions on the mechanical properties, thermal perceptual constancy and ultraviolet light shield of PSA composites werealso analyzed. The experimental results showed that nano-TiO2 with low mass fractions can be dispersed asin the PSA matrix the blending of nano-TiO2 had no demonstrabl e influence on the molecular structure and the chemical composition of PSA fiber the lechatelierite in PSA fiber was promoted at low nanoparticles mass fractionsbecause it can act as a nucleation agent the mechanical properties and the thermal stability of PSA/nano-TiO2composites can be enhanced obviously by blending nano-TiO2 into PSA matrix. The ultraviolet resistance of PSAcomposites can be improved significantly with the increase nano-TiO2 mass fractions and the 7 wt.% specimenshowed the lowest UV transmittance.Polysulfonamide (PSA) fiber is a new kind of hightemperature resistant material and it has outstandingheat resistance, flame retardancy, and thermal stability,therefore, it can be employ to develop protective products used in aerospace, high-temperature environmentsand civil fields with the flame retardant requirements(Ren, Wang, Zhang, 2007 Wang, 2009). However,raw PSA generally demonstrates poor ultraviolet resistance and the amide groups in polymer molecularchains a re prone to break down under the ultravioletradiation besides, the breaking tenacity of PSA fibersis low these properties lead to some difficulties in itsmanufacturing procedures and limit its exercise indeveloping functional textiles. Therefore, it is a challenging work to improve the mechanical propertiesand ultraviolet resistance of PSA.It has been proved that nano-TiO2 is one of theideal nano-enhanced materials and it has attracted greatscientific attention because of its excellent mechanicalproperties in significantly improved properties of composites (Ali, Shadi, Shirin, Seyedeh, Khademno,2010 Han Yu, 2005). Moreover, nano-TiO2 is goodsemiconductor oxides and it has excellent ultravioletscattering and absorption (Popov, Priezzhev, Lademann, Myllyl, 2005). It is feasible to blend nanoTiO2 into PSA matrix to improve the mechanical properties and ultraviolet resistance of PSA composites.ExperimentalMaterialsThe PSA polymer was used as spinning solution withintrinsic viscosity of 2.02.5 dL/g and relative molecularmass of 462. The rutile titanium dioxide (nano-TiO2)was blended as functional particles with a diameter ranging from 30 to 50 nm and the rutile content of nano-TiO2was nearly 99%. The dimethylacetamide (DMAC) wasselected as dissolvent in this study. The above materialswere provided by Shanghai Tanlon Fiber Co. Ltd. All thechemicals used here were of reagent grade and they wereused without further purification. proviso of PSA/nano-TiO2 compositesA certain amount of nano-TiO2 was predispersed inDMAC using ultrasonic vibration for 30min and thenadded into the PSA solution. The PSA/nano-TiO2composite spinning solutions with various mass fractions of nanoparticles was disposed(p) after mechanical stirring for 1 h and ultrasonic vibration for 2 h. Theexperimental info are shown in plank 1.The pure PSA fibers and PSA/nano-TiO2 composite fibers were developed by a small-scale and singlescrew wet spinning apparatus. Besides, the pure PSAmembrane and P SA/nano-TiO2 composite membraneswere prepared using the SJT-B digital spin-coatinginstrument. The preparation procedures of nanofibersand membranes can be referred to the previous studies(Chen, Xin, Wu, Wang, Du, in press Xin, Chen,Wu, Wang, in press).Test methodsThe dispersion of nanoparticles in PSA compositesS-3400N scanning electron microscope (SEM) with aresolution of 4 nm was used to characterize the dispersion of nano-TiO2 in PSA matrix. The machine wasoperated at 5 kV.FTIR spectroscopyThermo Nicolet AVATAR 370 Fourier transform infrared spectroscopy (FTIR) was used to characterize themolecular structure and chemical composition offibers each spectrum was collected by cumulating 32scans at a resolution of 4 cm_1X-ray diffractionX-ray diffraction (XRD) measurements of the crystalline structure of fibers were recorded on k780FirmV_06 X-ray diffraction using the CuK radiation( = 0.15406 nm). The spectra were obtained at 2hangles range of 5o60owith a scanning hotfoot of 0.8 s/ step.Mechanical properties testYG006 electronic single fiber strength tester was usedto investigate the mechanical properties of fibers. Thesample gage length was 10mm. The elongation speedwas set at 20mm/min. The measurements for eachsample were carried out 10 times and the average wasThe thermal stability testThe thermal stability of fibers was measured by Germany STA PT-1000 Thermal Gravimetric Analyzer(Linseis Inc., New Jersey, USA) the experiment wasconducted under nitrogen atmosphere with a gas flowof 80100ml/min the samples were heated up to700C from the room temperature at a heating rate of20C/min.Ultraviolet resistance testLabsphere UV-1000F Ultraviolet Transmittance Analyzer (Labsphere, Inc., northernmost Sutton, NH, USA) wasused to test the UV transmittance of membranes. Theinstrument parameters were described as below theabsorbance was 02.5A scanning time was about 5 sdata interval was 1 nm and the diameter of beam was10mm. The measurements for each sample were carried out for 10 times and the average was used for theresult discussion.Results and discussionThe distribution of nano-TiO2 in PSA compositesAs demonstrated in Figure 1, 1 wt.% of nano-TiO2 canbe dispersed evenly throughout the PSA matrix and the coat of it of nanoparticles is about 5060 nm with the nanoTiO2 mass fraction increase to 3 wt.%, a little hookup can be observed when the mass fraction of nanoTiO2 increased to 5 or 7 wt.%, its dispersion in PSAbecomes inhomogeneous because of their large specificsurface and high surface polarity, and the aggregationsize is about 100300 nm. It is difficult for nano-TiO2with high mass fractions to distribute uniformly in thePSA blending system.FTIR analysis of PSA/nano-TiO2 composite fibersAs shown in Figure 2, the position and shape of characteristic peaks of PSA composites blending with nanoTiO2 did not change obviously compared with the pristine PSA. The characteristic peaks of PSA compositesexhibiting at about 3338.99 cm_1can be attributed tothe amide NH stretching vibration and the peaks areflattened slightly with the mass fractions of nano-TiO2increased from 1 to 7 wt.%. It ascribes to the quantumsize effect of nanoparticles (Zhang Mou, 2001). Inconclusion, it shows no significant changes to themolecular structure and chemical composition of PSAfibers with the addition of nano-TiO2.XRD analysis of PSA/nano-TiO2 composite fibersAs show in Figure 3, the PSA composite fibers havediffraction peaks at 27.54, 36.15, 41.35, and 54.40,this is because of the blending of nano-TiO2 (Chen,Liu, Zhang, Zhang, Jin, 2003 Xia Wang, 2002).In addition, all the specimens have diffraction peaks atabout 11.85 and 21.25. The sharp diffraction peakscorresponding to 11.85o sharpen that there are crystalline structures in PSA/nano-TiO2 composite fibers(Yang, 2008). Besides, the sharpness of the diffractionpeaks at about 11.85 of composites enhances gradually with the nano-TiO2 mass fractions increased from1 to 5 wt.%. It suggests that t he crystallization in PSAcan be improved with the blending of nano-TiO2,because it can act as a nucleation agent. Moreover, theshape of diffraction peaks exhibiting at 21.25 of PSAcomposites broadens significantly with the increasingnano-TiO2 mass fractions and it proves that the size ofcrystal region becomes smaller (Meng, Hu, Zhu,2007).The mechanical properties of PSA/nano-TiO2 composite fibersAs illustrated in Table 2, the breaking tenacity of PSAcomposite fiber with 1 wt.% nano-TiO2 improvedobviously however, the improving degree of breakingtenacity begins to decrease with the continuousincrease in mass fractions of nano-TiO2 and the valueof the 7 wt.% sample is lower than the pure PSA.This is because nano-TiO2 is an ideal nano-enhancedmaterial the blending of it into PSA can improve themechanical properties of composites to some extent.Moreover, nano-TiO2 with low mass fractions can bedistributed evenly in PSA matrix and it can form agood interface with PSA molecular chains.As can be seen in Table 2, the composite fibers havelow elongation at break which is lower than the rawPSA simultaneously, the initial modulus of compositesincreased significantly, however, the improvementbegins to decrease with the mass fractions of nano-TiO2increased from 1 to 5 wt.% and the 7 wt.% sample hasthe minimum value of the initial modulus. It suggeststhat the blending of nano-TiO2 with low mass fractionscan improve the mechanical properties of PSA composite fibers to a certain extent.The thermal stability of PSA/nano-TiO2 compositefibersTG curves and derivative thermogravimetric analysis(DTG) curves of PSA/nano-TiO2 composite fibers aredemonstrated in Figures 4 and 5, respectively. Themain parameters of the curves are presented in Table 3.In Figure 4, the thermal annihilation behaviors ofspecimens are divided into three regions.The first region is a level of small mass loss ranging from room temperature to 400C. As depicted inFigure 4, each TG curve has a sharp decrease in thebeginning and then reaches a platform with the temperature heating up to 350C. However, the mass lossof PSA composites blending with nano-TiO2 is alwayslower than the pure PSA during this process. Asshown in Table 3, the T10wt of each PSA composite ishigh, whereas the mass loss of pure PSA reached 10%at 170.19C. This suggests that it is hard for the PSAcomposites to decompose and the thermal stability issignificantly higher than PSA.The second region is a pose of thermal decomposition process ranging from 400 to 600C. Accordingto the analysis of bond nothing (Zhang, Cheng, Zhao, 2000), the CN section of amide in PSA macromolecular chains decomposes at 500600C (Broadbelt, Chu, Klein, 1994a, 1994b) and the mass lossof PSA at this stage is attributed to the gases releasedsuch as SO2,NH3, and CO2. In addition, as illustratedin Table 3, the To of PSA composites blending with 1and 3 wt.% nano-TiO2 can be increased therefore, itsthermal stability can be improved correspondingly.A s exhibited in Figure 4, the mass loss of specimens accelerates steadily with the increasing temperature and each TG curve presents a rapiddecomposition at about 500C. Corresponding to therapid decomposition, there is a peak in DTG curveshown in Figure 5 and the Tmax can be determinedaccording to the value of the maximum peak (Yang,2008).The third region is a high-temperature phase ofcarbon formation ranging from 600 to 700C. Asdemonstrated in Figure 4, the PSA composites dummy upshow a slight decomposition during this stagebesides, the mass loss of pure PSA decreases obviously. As illustrated in Table 3, the residual mass ofcomposites at the terminal temperature is higher thanthe pure PSA.Therefore, it is concluded that the thermal stabilityof PSA composites blending with nano-TiO2 can beimproved significantly.The ultraviolet resistanceAs exhibited in Figure 6, the ultraviolet transmittance of specimens ranging from 390 to 400 nmdecreases gradually with the increase in mass fracti ons of nano-TiO2. This suggests that the nanoTiO2 can improve the ultraviolet resistance of PSAcomposites significantly. This is because the bending index (RI) of nano-TiO2 is extremely high(2.73) and it has excellent ultraviolet scatteringproperties (Liu, Tang, Zhang, Sun, 2007). Inaddition, electrons in nano-TiO2 are transited fromthe valence band to the conduction band under theultraviolet radiation therefore, the nano-TiO2 hasoutstanding ultraviolet absorption properties.ConclusionsThe PSA composite fibers and membranes with different mass fractions of nano-TiO2 were developed.The experimental results can be summarized as follows(1) The nano-TiO2 with low mass fractions (1 or 3wt.%) can be distributed evenly in the PSAblending system however, it is difficult fornano-TiO2 with high mass fractions (5 or 7 wt.%) to disperse homogeneously throughout thePSA matrix.(2) The blending of nano-TiO2 showed no obviouschanges to the molecular structure and chemicalcomposition of PSA compos ite fibers.(3) The crystallization of PSA composite fibers canbe improved by blending with low mass fractions of nano-TiO2, because it can act as anucleation agent.(4) The breaking tenacity and initial modulus of45ance %(a)(b)(c) PSA composite fibers can be improved obviously by blending with low mass fractions ofnano-TiO2 whereas the elongation at breakof PSA composite was decreased with theparticles mass fractions increased from 1 to 7wt.%.(5) The thermal stability of PSA composites can beincreased significantly and the nano-TiO2 hassome influences on the To, T10wt, and Tmax ofPSA composites compared with the pure PSA.(6) The blending of nano-TiO2 can improve theultraviolet resistance of PSA composites signifi-cantly and the 7 wt.% specimen had the lowestUV transmittance.

MUDs: An Adventure in Cyberspace :: Internet Computer Essays

Hi, my name is Jamal. Im a tall, gorgeous black man with a bod made for sin. Talk to meHi, Im India, an strange prostitute with a fondness for short, Norwegian men.Harry here . . . Im handsome and shy, and looking for love. . .My name is Sophie, and my job as a songwriter has led me to the neat city of Miami.Hello, Im Lila. I am a 24-year old Jazz singer with a preference for foreign men. If you qualify, definitely say hi.The people you see in a higher place are very interesting individuals, all unique and distinctive. At first glance, there seems to be no common thread that connects them, except for the fact that they turn out to be seeking some sort of interaction. No, these are not entries in a Personals Column or members of a support group for the love-lost. All of them do, however, dower a very important characteristic. They are all facets of the same person they are all descriptions of me. No, I am not schizophrenic or kooky I am simply one of the many that has found ente rtainment exploring a MUD-- an acronym that stands for Multiple User Domain or Multi User Dungeon. Before this assignment, I had no idea that MUD was something other than dirt mixed with water or that the world that existed on-line was so immense and so popular. In fact, MUDding has become one of the most sought after forms of interactive entertainment in the world, engaging tens of thousands of players (Leslie 28). The world of MUDding seems like a relatively new concept, but the justice is that MUDs have been around for years. Invented at the University of Essex in England in 1979, MUDs served as a computerized way to play Dungeons and Dragons, a popular and addictive role-playing game that mesmerized thousands (Rigdon R16). spot the undisputed thrill of participating in such a game was the ability to reshape identity, other attracting factors were the relationships that a player could develop with fellow characters. Today, some(prenominal) adventure-type MUDs and social MUDs work in the much same way that Dungeons and Dragons did 20 years ago--players take on an identity and enter a fantasy world, still now they can communicate with people from around the globe. This type of role-playing sounds like simple fun, but the underlying issues and complex social situations that materialize are more than than just childs play.

Effect of Organic Farming on Soil Nutrients and Structure Essay

Effect of Organic Farming on Soil Nutrients and StructureWorks Cited MissingSince the 1970s, the agribusiness and agrochemical industries have been aware of a ripening problem as the global population soars, soils around the world are becoming less suitable for farming as a result of erosion, solid food depletion, and structural degradation. In the United States, about 60,000 farmers have abandoned the conventional system which relies on chemical fertilizers and pesticides, and adopted the organic farming systems that allowed areas of China and India to be successfully farmed for 4,000 years (Reganold et al., 1990, p. 112). Organic farmers use go down be and animal and municipal wastes for fertilizer, and rely on natural predators and disease-resistant crop strains to keep insects and fungi chthonian control. While these methods are appealing to many on philosophical grounds, they also bring tangible benefits to farmers who observe improved soil structure, nourishing levels, and erosion control. galore(postnominal) of the benefits that farmers claim to receive from organic farming are related to increased humus levels. Droeven et al. (1980) found that field which received additions of farm-yard manure (FYM) had organic matter levels that were significantly higher than those in fields using chemical fertilizers and plowing in the plant matter from previous crops -- the method used on conventional farms (p. 215). Reganold et al. (1993) compared 16 biodynamic (organic farms that also incorporate silica and plant preparations) and conventional farms and reported that the biodynamic soils consistently had a 1% greater carbon content (p<0.01) (p. 346). This increased organic matter content has a variety of positive consequences. Reganold ... ...ic farming measurably disrupts natural processes, but it must be noted that a great deal of plant material is not returned to the soil in Nigerian farming practices, and so has the opportunity to deplete the soil in nutrients that plants use to grow. While the findings of Aweto and Ayuba provide severe evidence that organic farming probably can not leave any soil ecosystem undisturbed. The simple act of removing some plant matter causes nutrient depletion over time. However, the addition of manure and plant material, rather than simply using inorganic fertilizers provides a way adapt natural processes in the soil to embolden in the cultivation of crops. The benefits of a healthy soil ecosystem range from decreased erosion to easier plowing. And through recycling the wastes that are now being produced, agribusiness whitethorn yet be able to feed the global human population.