Synthesis and Properties of Liquid Crystals for VAN

Synthesis and Properties of Liquid Crystals for VAN Synthesis and properties of liquid crystals for vertically aligned nematic (VAN) displays Introduction Liquid crystals where first observed in 1853 and 1855 by Rudolph Virchow and C. Mettenheimer respectively, both observed a flowing fluid like compound which was birefringent (brightly coloured) between cross-polarisers much like a crystalline solid, hence the compound was both liquid and crystal thus liquid crystal. [3, 4]. It was not until the late 1980’s that Liquid crystals and their truly fascinating fundamental properties began their tremendous success in commercial applications.1–5 Subsequently giving rise to the vertically aligned nematic (VAN) mode in the early 1990’s. The liquid crystalline phase can be best described as a hybrid of the two most common phases of matter, Liquids and Crystals. LC compounds diffuse about much like the molecules of a liquid giving them a fluid nature, combined with this they manage to maintain a small magnitude of orientational order and sometimes some positional order in a similar manner as a crystalline solid would. Hence, liquid crystals are anisotropic fluids. Properties of Liquid crystals and the nematic mesophase The nematic phase of calamitic (rod like) liquid crystals is the simplest liquid crystal phase. In this phase the molecules maintain a preferred orientatioanl direction as they diffuse throughout the sample. There is no positional order in the phase as depicted by figure 1.1. Synthesis of Liquid Crystals General Synthesis Generally, the most common liquid crystals are based on aromatic sub units due to their ease of synthesis and obtainability. The vast majority of LC building blocks are commercially accessible or fairly simple to synthesize via electrophilic substitutions such as Friedel-Crafts acylation, bromonation and nitration. For those functional groups that cannot be directly substituted interconverions usually take place with bromine often being the chosen leaving group (e.g., CO2H, NH2, CN and OH). Due to the individual nature of substituents their specific directing effect and a specific effect on the rate of reaction must be taken into consideration. By taking this into account reactions must be carried out in the appropriate order to arrive at the desired product. Figure 1 Electrohpilic Substiutions of Benzene A key advancement in synthesis arrived with the recognition that a wide range of intermediates could be efficiently prepared from alkyl-bromo-benzenes due to the ease of conversion of the bromo substituent into a previously inaccessible groups. From a range of synthetic methods described in scheme 1 a valuable number of carboxcylic acids and phenols can be prepared. This follows on to the synthesis of multi-aryl LC materials where esterification (see Scheme 2) is employed to couple multiple aryl units. Esterification commonly occurs in two processes firstly, the traditional method (Method A) of converting the carboxcylic acid into the acid chloride derivative with either thionyl chloride or oxalyl chloride. The acid chloride is then reacted with the phenol in the presence of a base to remove the hydrogen chloride as it is formed. The second and more recent method (Method B) involves an in-situ reaction which uses N,N-dicyclohexylcarbodiimide (DCC) to activate the acid towards nucleop hilic attack from the phenol and a proton transfer catalyst ( 4-(N,N-dimethylamino)pyridine ) (DMAP). Scheme 2 Esterification coupling reaction LC materials with multiaryl cores (e.g., biphenyls and terphenyls) are somewhat more difficult to produce due to the direct bond between aryl sections. However, the development of palladium-catalysed cross-coupling reactions has created a means in which to form the direct carbon-carbon bonds needed. There are a vast number of methods to facilitate the generation of these carbon-carbon bonds but by far the most prolific involves the use of aryl bromides (4) and arylboronic acids (5). Figure 3 Palladium catalysed cross-coupling Alternative to the use aryl bromides are the aryl iodides, there increased stability as a leaving group provide a reaction pathway with an increased rate of reaction. Chloro and triflate are also other viable leaving groups, where the triflate group is essential in the synthesis of alkenyl-substituted LCs. Perhaps the most important palladium-catalysed cross-coupling reaction is the selective coupling that can occur by using a bromo-fluoro-iodo-substituted system (see Scheme 4) Figure 4 Dicouplong reactions of Benzene derivatives As the iodo group is a better leaving group it can be coupled with an arylboronic acid, following purification a second coupling reaction can occur on the bromo site giving rise to the synthesis of LC materials with more than two aromatic core units. In order to control the mesomorphic and physical properties of LC lateral substitutions are often employed, the fluoro substituent is the most commonly used lateral unit, as it is electron withdrawing in nature it renders adjacent H atoms acidic and thus making them vulnerable to strong basic conditions. By taking advantage of this vulnerability the desired functional groups for example the boronic acids needed for cross-coupling reactions are far more easily obtained. The only consistent approach for introducing a fluoro substituent into an aromatic system is via the diazotisation and successive fluoronation of the chosen aromatic amine, which in turn generated from the reduction of the nitroarene generated from the nitration of the bas ic aryl unit. Nonetheless, a broad variety of simple fluoro-substituted materials can be easily acquired commercially and thus synthesis often begins with fluro substituents already present (see Scheme 5). Unfortunately this gives rise to complications when trying to introduce terminal alkyl chains to the fluorinated compounds. Accordingly, a different approach is required and thus bromo-fluoro-iodo-benzene units are needed for successful synthesis of fluoro-substituted LC materials. Scheme 4 shows some reactions of these units to synthesis some adavance LC materials. The finishing touches Liquid crystals for VAN mode displays must have one vital property in order to be considered for this application, negative dielectric anisotropy. Negative dielectric anisotropy can be introduced by creating a strong lateral dipole within the LC material this is done by introducing lateral groups with high electronegativity such as fluorine as explained previously in this section, lateral chloro substitutents have also been considered in order to create negative dielectric anisotropy as they create a greater dipole than fluorine. However, the greater size of the chloro substituent renders it of little use as this subsequently gives the material low liquid crystal phase stability and high viscosity making it useless in VAN mode displays. Figure 5 Subsitution reactions of difluroaryl compounds Vertically aligned nematic (VAN) liquid crystal displays About the VAN displays The vertically aligned nematic (VAN) mode first came into development in the early 1990’s, first generation LC materials were based on rod like molecular structures and managed to achieve fast switching times of around 25ms. Unfortunately, the early attempts to introduce displays of this kind failed. This was for two major reasons, a switching time of What makes up a VAN display? VAN devices are made up of two parallel glass plates separated by a small gap of 3-10Â µm containing the nematic liquid crystal phase, on the top piece of glass sit a thin film of material which polarises a light that passes through it. On the inside of the top piece of glass there is a indium oxide (ITO) layer which acts as a conductor, this layer is linked to a surfactant. The inner layer of the bottom piece of glass is also coated with the ITO layer and the surfactant. The surfactant enables the liquid crystal to be connected with the conductor thus enabling the flow of a current. The display can be designed to be either passive or active. When passive the display does not generate any light itself it instead uses ambient light from surroundings which is reflected by a mirror like surface below the bottom piece of glass. When designed to be active the display is built with a light source behind the display which passes directly through the display rather than being reflected Working principle of VAN displays The average molecular orientation (director orientation) without the electric field is perpendicular to the substrate of the display. With this homeotropic orientation and crossed polarizers, the VA mode is working in the so called normally black mode. For the incident light the liquid crystal in the off state behaves like an isotropic medium (the light sees only the ordinary refractive index). As a consequence very good black states can be achieved independent of the wavelength of the light and the operating temperature. Pixel and electrode design of VA displays allow for a high aperture ratio resulting in a high brightness of the display. These two points are the main reason for the good contrast of VA LCDs.. Since the directors are oriented homeotropically in the off state, they can be tilted randomly in any direction by the electric field. This leads to disclination lines between domains of equal orientation, thus deteriorating the optical performance. Figure 6 VA Mode working display As VAN displays use LC materials with negative dielectric anisotropy, application of a voltage to the ITO films cause the director to tilt away from the normal to the glass surfaces as show in figure 2. This introduces a birefringence because the index of refraction for light polarised parallel to the director is different from the index of refraction for light polarised perpendicular to the director. Some of the resultant elliptically polarised light (all of it if the retardation is 180) passes through the crossed polariser and the display appears bright. In fact, since the retardation depends on the magnitude of the voltage applied to the display, this type of display can be used to produce a range of intensities of light. This is called a grey scale. For VA you have perfect black in the off-state and if apply a voltage the VA materials moves into the parallel position and this is bright. Therefore, you get a better contrast ration in VA displays. The second advantage is the switch ing process. It’s intrinsically faster to move the molecules this way.

AT&T Case study Essay

1. Review AT&T’s past financial policies and financing choices. Were these appropriate for the nature of the business? AT&T Corp., one of the largest companies in the United States, has had a long and storied history. Initially, AT&T operated as a monopoly, but in 1982, Justice Department, broke up the company into individual companies. Prior to divesture (in 1981), AT&T was the largest private company in the world and despite many challenges, AT&T remained an archetypical â€Å"widow-and-orphans† stock for a long time. The term â€Å"widows and orphans† was used to describe stocks with a relatively high degree of safety and dividend income and numbers from exhibit 1speak for themselves. By 1982 the company increased all its key financial indicators. Revenues and operating earnings increased 12% and 6% respectively comparing to year 1981. In ten years, the company raised its revenues, net income, cash and assets more than 2 times. It`s worth to mention that AT&T was able to reduce its total outstanding debt by $ 725 mil and at year-end, the company`s debt ratio stood 42.3% down from 46.7% in 1980. In addition, AT&T neither cancelled nor lowered dividends, and only increased dividend per share by 10% annually. Aforementioned facts suggest that company`s financial policies and financing choices were appropriate for the nature of the business and that AT&T was one stable, reliable and profitable companies in the world by 1982. 2. In what fundamental ways will AT&T’s business change in the near future? Throughout most of the 20th century, AT&T held a monopoly on phone service in the United States. In 1982, through an agreement between AT&T and the U.S. Department of Justice, AT&T agreed to divest itself of its local telephone operations but retain some of its businesses. The principal provision of the antitrust settlement was that the corporation would be split into seven completely independent regional corporations. Each regional company would continue to provide local telephone and other telecommunication services in addition to ability to sell telephone equipment. The remaining or new AT&T would focus on long distance, R&D and manufacturing arms. 3. In view of AT&T’s changing strategic and economic environment, what debt policy would you recommend? What other financial policies are appropriate for the â€Å"new† AT&T? What are likely to be the consequences of these financial policies? The new â€Å"AT&T† was no more monopoly and the company`s management group faced new challenges. First of all, I think that when AT&T was monopoly, managers were averse to risk and led more financially conservative policy. After divestiture, it was clear that the external environment changed and effective actions needed to be taken to beat off intense competition. Moreover, there were several serious questions about future profitability of the new AT&T divisions (especially Western Electric) and it was not clear whether they would be able finance their operations in competitive markets. Taking into consideration above stated facts, at that phase I would recommend to shift gears from debt financing and switch toward equity financing. In addition to the change in financial policy, I would also recommend considering a new acquisition strategy to reach more diversified portfolio and to broaden the company’s scope in other areas.

The Impacts of the Residential School System on the...

‘I want to get rid of the Indian problem. That is my whole point. Our objective is to continue until there is not a single Indian in Canada that has not been absorbed into the body politic and there is no Indian question’ (Scott in Grant, 1996: 273). Canada is a vast territory widely recognised for the cultural and geographical diversity in nature. This alone poses a distinct challenge to understanding a unified conception of Aboriginal Geographies of Canada - particularly for understanding the Geographies of The Canadian Residential Schools System (RSS). The Canadian Residential School System was an early government led approach to Indigenous ‘development’. It was initially implemented to educate the ‘uncivilised’ Aboriginal populations of Canada as a way to assimilate Indigenous people into the colonial settler population. This created profound effects on Indigenous people in Canada, including the spaces and places so integral to their culture. In this essay I will discuss the impacts of the residential school system on the Aboriginal people of Canada with particular reference to how space and place are critical importance to mapping the geographies of the Canadian Residential School System. In conclus ion, I suggest that the impacts of the Canadian Residential school system have had direct impacts on not only physical space, but also the places that have intrinsic meaning to both the identity and culture of Aboriginal people in Canada. Fig 1. SelectedShow MoreRelatedTruth, Reconciliation, Healing : A Curriculum1478 Words   |  6 Pagespaper brings together the two perspectives of residential school abuse and the viewpoint of healing. Intergenerational effects have been created due to residential school and have devastating impacts on Aboriginal communities. This paper explores how a school curriculum would help spread awareness of the wrongs committed against Aboriginal communities and how we can set the path for healing. From the 1880s to 1996, residential schools were operated in Canada by the church and the Canadian governmentRead MoreCanada Is A Nation Free Of Racism Essay1350 Words   |  6 Pagesassumption of many that Canada is a nation free of racism. Canadians pride themselves on being culturally diverse and accepting, and on having relatively progressive social policies such as that of universal healthcare. However, there are many ways in which the current and historical policies have expressed explicit racism that have left an already marginalized population with the crumbs of society. A prime example of this can be demonstrated in the mass overrepresentation of Aboriginal youth in care. ByRead MoreAboriginal Children Into Euro Canadian Culture1418 Words   |  6 Pages Rees 1 â€Å"Thousands of Canada’s Aboriginal children died in Residential Schools that failed to keep them safe from fires, protected from abusers, and healthy from deadly disease† (Kennedy). â€Å"Residential Schools were government-sponsored religious schools established to assimilate Aboriginal Children into Euro-Canadian culture† (Miller). There were approximately 130 schools in every province and territory with the exception of Newfoundland, Prince Edward Island and New Brunswick all with an estimatedRead MoreEffects of Coloniztionon First Nations1483 Words   |  6 Pagesit continues to affect First Nations, Metis, and or Inuit peoples today and how it may be reflected in your proposed specific area of social work practice. To begin with, colonization began when first contact was made between Indigenous peoples of Canada and Europeans. At first the settlers were humble to Indigenous peoples and learnt how to survive the diverse land of what is known as Canada. As settlers began getting established in Canada, the land began getting taken over by Europeans. The signingRead MoreThe Social Determinants Of Health1555 Words   |  7 PagesAmerica to the lives of Indigenous people, has had a tremendous impact comprehensively. After so, this contact decimated every aspect of the Indigenous way of life. The health and well-being of Indigenous people initiated to worsen severely not only in the physical aspect but also mental. According to National Household Survey conducted in 2011, 1,400,685 people have been identified as being a member of one of the Aboriginal groups within Canada. Within these Aboriginal groups, critical mental healthRead MoreThe Truth And Reconciliation Commission ( Trc )1536 Words   |  7 Pageswere forcibly removed from their communities, and sent to Indian residential schools. Generation after generation of indigenous children were denied the right to speak their own language, explore spirituality and to learn about their rich cultural history. These schools were designed to assimilate indigenous children into the society of the European settlers. It was under that system that Aboriginal children were required to attend schools that would ‘take the Indian out of the child,’ in hopes to solveRead MoreResidential schools1468 Words   |  6 Pages Abstract This research explores how the residential schools established in the 19th century affected the Native population and the Canadian government. This has been done by examining primary sources such as digital archives, books, statistics and reports. Upon examination of these events, it becomes clear that residential schools had a long term negative impact on the Aboriginal communities and created a negative image to the Canadian government. Despite the government’s goals of assimilatingRead MoreHow did the residential school affect Canada’s First Nations people?1535 Words   |  7 Pagesthe residential school affect Canada’s First Nations people? In Canadian history, there are a lot of interesting events happened in the past. Some of them are events that are proudly presented such as Battle of Vimy Ridge, Canadian peace keeper and others. On the other hand, there are also a lot of tragedy events that happened in the past. Indian Act is one of an important act which occurred in 1876 and it led to establishment of  Indian residential school, and the Indian residential school is aRead MoreHistory Of Violence Against Aboriginal Women1068 Words   |  5 PagesHistory of violence against Aboriginal women in Canada No analysis of violence against Indigenous women can be made without first looking at colonization as the antipasto of the conflict (Cooper Salomons 2010). â€Å"It is thus paramount to understand the context of colonisation in Canada in order to begin to understand the structural problems and barriers that lead to serious numbers of missing and murder Indigenous women in Canada.† (Cooper Salomons 2010, 31). When the Europeans first came to â€Å"turtleRead MoreCollective Rights995 Words   |  4 Pages* Collective rights are rights Canadians hold because they belong to one of several groups in society. They are rights held by groups (peoples) in Canadian society that are recognized and protected by Canada’s constitution. Those groups include Aboriginals, Francophone and Anglophones. Treaty 6, 7, 8 states that the aboriginals could have health care, education, hunting and fishing rights, reserves, farming assistance, payments annuities, and special benefits. All in return for the first nations

My Years at Troy High School Essay - 1128 Words

Four years of my life drained away at this place called Troy High School. After this year I will be walking away from Troy, worn and torn from the hours of anticipation for grades to be posted, the next weekend to arrive, the answer to whether that special someone will say yes to the next dance, or the unbearable wait for that painstaking bell to ring. Troy is a place of education, a very good one at that, with its Blue Ribbon Award and national recognition, you’d think I would be walking away with knowledge that will serve me well for decades to come, but no. I could have learned the same things I learned at Troy anywhere, it is the insight I picked up that will take me far. â€Å"What insight?† you ask. Its priceless wisdom really, it’s a†¦show more content†¦Shall we go through the categories of classes? Alright, English class, with the countless papers written and the innumerable words read, one forgets the primary protocol that is taught over and ov er again: Don’t take everything literally; things often take on several meanings. This can hold true for the words I wrote in this paper, and to which you are reading now. Also, one can graciously note that every climax has a downfall, without a downfall there is no climax. Math contains its teachings in the same way, during the crude formulas and nauseating equations one forgets the basic idea the teachers unknowingly show us: check your answers and simplify the final product. Okay maybe the idea of checking your answers is not one that is too difficult to comprehend but do consider in real life there is no BOB (Back Of the Book) or a calculator to rely on, all your choices and resolutions are chance, so be sure to check if you first choice is best. 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In the play Fences by August Wilson, two main characters Troy and Cory Maxon build a fence, literally and metaphorically, which as the book progresses, becomes a symbol that allows each character to truly understand each other. In Fences, Troy Maxon builds a fence around his property that contains metaphorical reasons as well as the literal meaning. During a conversation with Troy and Cory, Bono mentions the fence Troy is building for his wife Rose and says â€Å"Some people build fences toRead MoreCan People Really Change?903 Words   |  4 Pagestwenty has wasted thirty years of his life. All people change when they go through different phases in their lives but not everyone learns from their mistakes. The play Fence, by August Wilson, is a story of a man, Troy, who faces many problems in his life but unfortunately never learns from his experiences. Troy slowly loses everyone in his life and then eventually dies from a heart attack. 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Paradoxes of Power in Sociological Insight by Randall Collins

Paradoxes of Power in Sociological Insight by Randall Collins It may be said that the institution of power has always been a prevalent force in our society. It is a large part of what holds society together; without it civilized society as we know it would not exist. The functions of power range from keeping crime at bay to the more commonplace aspects such as allowing patrons to be served in a restaurant. The notion of power is almost invisible until further analyzed; it is something that we perceive as being simple and therefore take for granted. Yet there are so many intricacies in regard to power that still remain to be seen. In Chapter Three of Sociological Insight by Randall Collins, the author†¦show more content†¦Yet some forms of power are certainly more effective than others. The key to realizing power most effectively lies in the acknowledgement of occasional concession and knowing when to giv(e) in on something less important (74). For instance, once again consider the example of a mother and child. Assume that the child wants to go over to a friends house to play, but he has promised his mother that he would do his chores that afternoon. The child begs his mother to let him go and play, assuring her that he will do his chores immediately upon arriving home. The mother concedes, and the child is happy. If we are to analyze this situation in terms of gains and losses, the mother has gained points with her son and has essentially suffered no loss-the chores will still be done, only a few hours later. Throughout the entire scenario, the mothers power is evident, both explicit and implicitly; the son does not forget that his mother has the ultimate say in what he does, and in letting her son go she has not only made him happy but is also asserting her power as a parent. In sum, the mother has most effectively realized her power by knowing when to sacrifice something that is of lesser importance while gaining more long-term benefits. Another way that power may be asserted is by the influences of certain situations, namelyShow MoreRelatedContemporary Issues in Management Accounting211377 Words   |  846 Pagesalso those of the profession and the wider public sphere. Ever helpful to regulators, the senior civil service, and international agencies, Michael Bromwich is respected for the ways in which he can combine conceptual understandings with pragmatic insights. He has been sought out to provide that extra element of conceptual clarity for the most complex of practical accounting endeavours. No doubt such abilities reflect Michael’s early grounding in both the practice of accounting and its economic theorizationRead MoreManagement Course: Mba−10 General Management215330 Words   |  862 PagesGeneral Management California College for Health Sciences MBA Program McGraw-Hill/Irwin abc McGraw−Hill Primis ISBN: 0−390−58539−4 Text: Effective Behavior in Organizations, Seventh Edition Cohen Harvard Business Review Finance Articles The Power of Management Capital Feigenbaum−Feigenbaum International Management, Sixth Edition Hodgetts−Luthans−Doh Contemporary Management, Fourth Edition Jones−George Driving Shareholder Value Morin−Jarrell Leadership, Fifth Edition Hughes−Ginnett−CurphyRead MoreStephen P. Robbins Timothy A. Judge (2011) Organizational Behaviour 15th Edition New Jersey: Prentice Hall393164 Words   |  1573 PagesPerception and Individual Decision Making 165 Motivation Concepts 201 Motivation: From Concepts to Applications 239 3 The Group 9 10 11 12 13 14 15 Foundations of Group Behavior 271 Understanding Work Teams 307 Communication 335 Leadership 367 Power and Politics 411 Conflict and Negotiation 445 Foundations of Organization Structure 479 v vi BRIEF CONTENTS 4 The Organization System 16 Organizational Culture 511 17 Human Resource Policies and Practices 543 18 Organizational Change

Can you remember the last time you had a sweet Free Essays

Surely the last time you had a sweet wasn’t because you worked hard for it, or because you were on your bestest behaviour that your mum decided to treat you. In fact, you’re probably having something sugary as your reading this; what is it this time: A Sherbet? A Skittle? Or a plan and simple, sugar filled frothy fizzy drink. If you’re not drinking it now, the last time you probably drank it was to ease the chicken and chips going down your throat for lunch. We will write a custom essay sample on Can you remember the last time you had a sweet? or any similar topic only for you Order Now It’s more attractive than the healthy stuff. It’s cheaper than the healthy stuff. No doubt tastier than the healthy stuff. So why are fizzy drinks and sugary snacks being replaced by the healthy stuff? Shouldn’t they be banned altogether? Decaying of the teeth are the main reasons for toothaches. 60%, that’s almost 2 out of every 3, children in Scotland have a dental disease from as young as 3 years old. Sweets and fizzy drinks allow this to happen. The unnatural sugars they contain erode your teeth to make them thin and see through. I once knew a boy who had no front teeth! Well that’s what it looked like anyway. He drank so many Coca Colas that his teeth started looking like glass. Not only did he get laughed at but he wasn’t allowed sweets for the rest of his life. I don’t know bout you, but I definitely think sweets are not worth that, even if they taste unbelievably scrumscious. While your mouth bathes in the sweet syrupy substances, it’s sometimes easy to forget where you left the wrapper. Nearly everyone throws it’s in the bin. But the minority don’t dispose of it as sensibly. This is a health hazard. Imagine slipping on a slick silk like chocolate wrapper and cutting yourself on an open tin can, all because a one child didn’t throw his rubbish away. And when your classrooms full of sweet wrappers, cans of coke, and tables looking like they’ve been moulded from chewing gum, learning is not easy. Learning is important while you’re young. It’s where the basic yet very crucial information is taught. Without knowing the basics, it’s almost impossible to progress in life. But when you’re tied and feeling lazy this too can make it difficult. And the main reason why you’re tied during the day is because you’re up during the night. And the main reason why you’re up during the night is because you drank to much caffeine during the day. And the main reason why you drink caffeine is because it’s in fizzy drinks; and fizzy drinks are addictive. I know this seems like just another article telling you that sweets are bad and that you should stay away from them. You probably get enough of that from your parents, teachers and dentists. But it’s true. They damage your health, create hazards and in all stop you from reaching your full potential in life. And besides, there are only so many pounds the tooth fairy has. I don’t think she can afford to pay you everyday for every tooth that will eventually fall out if you carry on consuming candy. Ban the sweets and fizzy drinks: Ban the damage, hazards and create yourself a better future. How to cite Can you remember the last time you had a sweet?, Essays

Efficient Wastewater Treatment and Recycling Systems

Question: Discuss about the Efficient Wastewater Treatment and Recycling Systems. Answer: Introduction Water is one of the most key natural resources to the survival of mankind and is very much unlimited though a bit scarce in some societies. It surrounds the lands both far and near. Its usage in some of the regions across the world currently has augmented past the limits that natural water resources can sustain since it results in a reduction of some natural water resources including ponds, rivers, reduced the quality of drinking water, pollution of the environment and lastly increased periods of drought. For instance, Australia has been affirmed to be a high-stress region in regards to problems associated with water. All these are attributed to the factors that there is continuous increasing world population in addition to the impacts of impulsive climate in most regions creating adverse effects on the water supply on earth(Chris Binnie, 2008, p. 60). Despite the availability of a variety of water reuse supplies, this report is directed to only the desalination of sea water and treated water. Recycling of water and see desalination are the strategies that will help to decrease the stress on the water resources while making them more sustainable to mankind despite debates and arguments about acceptance of the recycled water. Two aspects are mainly discussed in this report; the perception of the community in the acceptance of the desalinated water and recycled water including the approaches for community involvement. Surveys and studies were carried out earlier on public perceptions and the methods for engaging the public to adopt the use of recycled water and desalinated see water is also discussed(Chris Binnie, 2008, p. 65). Background on Sydneys Metropolitan Water Plan Sydney as a city in Australia is one of the most populated and its population is increasing at a very high rate. Currently, its population is approximately 5 million, and it is projected to go up to 6 million by the year 2036. Thus there is a need for a very strong, sustainable and efficient water plan by the state authority to manage this vast population. The metropolitan water plan comprises of water supply, and the management system of the plan takes into account the security, safety, sustainability and the cost-effective water supply to Sydney city. Besides, the metropolitan ensures the handling of drought and the law rainfall situation, good health to the citizens and the state of water bodies that are obstructed by the dams constructed to stream water all over the state(Fereidoun Ghassemi, 2007, p. 235). The estimation of this plan is the provision of water security until the year 2025 to the NSW. Sydneys metropolitan water plan has major characteristics as outlined below; A Higher percentage of Sydneys drinking water will be obtained from the dams. Introducing innovative water efficiency programs will help to minimize water consumption in industries, agriculture, households and in governments. The estimated water supply plan will help to satisfy at least 15% of the current water requirements Investing in the recycling project will help to minimize the demand for drinking water hence lowering the load on water bodies(Fereidoun Ghassemi, 2007, p. 243). Presently, various environmental issues such as weather inconsistency, global warming, etc. have been on the mention and extracting water from the natural water bodies and land is a contributing factor to these challenges. Therefore, the techniques involved in this plan and community engagement will surely help to decrease the demand for water. The engagement of the community is also an effective method since it has created a friendly partnership between the government and the community on water harvesting, recycling and minimizing water loses especially the leakage loses(Fereidoun Ghassemi, 2007, p. 247). The introduction of water meter helps to inspect the quality of water regarding the nutrients contained and the recycling water release in water bodies. The investment in these technologies will greatly help to solve the issue of water and increase the usage of recycled water and desalinated water in the future(Fereidoun Ghassemi, 2007, p. 266). Community Views on Advanced Water Treatment Adoption There are several views on the application of desalted water as opposed to reuse of wastewater. Various countries currently are facing the water challenges since they poses limited water resources and provisions to meet both their current and impending water demands. Besides, there is also a possibility of heavy pollution in their water bodies. With an increase in population, climate change and uncertainty of rain among others, these problems are deemed to becoming worse. Thus to curb the water crisis, the state authorities have a task of coming up with technical solutions to increase the water supply, quality, and the water level. The engineers have come up with new technologies which make water to be used once again after its use and also making the seawater drinkable through a process known as briefly described below(Gayathri Devi Mekala, 2008, p. 566). Recycled water is water which is treated after it has been used once. The treatment involves various stages whereby the physical, chemical, and biological impurities are eliminated through various processes such as ultrafiltration. After treating the wastewater, the state authorities discharge it in large water bodies where it gets recombined with water devoid of impurities thus reducing the level of concentration of contaminations in the water body thereby being able to be used once again. On the other hand, it can be used directly without mixing it back to the fresh waters. Below is a diagram of the whole process(Gayathri Devi Mekala, 2008, p. 570). Desalinated water Desalinated water is water that is void of salts and minerals .thus through a process of reverse osmosis, these salts and other harmful particles are eliminated making the water safe for human use. Below is the diagram for the desalination process The studies and surveys that have been conducted in the past concerning the adoption of recycled water and desalinated sea water show that the public adoption was very little. Related research have been done in the recent past and the response is almost the same. These type of studies are carried since the 1970s. In most cases, the response was that people have the general acceptance to use of recycled water, but on a low personal contact, for instance, they will prefer to use it for gardening purposes and for purposes of flashing in the toilet. Personal contact such as drinking, washing, and bathing was mostly not for the opinion of many(Gayathri Devi Mekala, 2008, p. 600). The survey conducted in Australia by Hurliman and Dolnicar records that 92% of the residents consented to the use of recycled water for non-contact purposes such as gardening. Only 36 % of the residents were positive about the use of recycled water for drinking. On the other hand, the survey on acceptance of desalinated water showed that 53% of the residents were positive for its use in drinking, bathing, and washing but 84% were ready to use it for gardening purpose and other outdoor usage. Thereby this study implies that desalted water is most favored over water that has been recycled for contact usage i.e. drinking, bathing and washing(Gayathri Devi Mekala, 2008, p. 720). Though the acceptance level of this water is increased, majority of the people still are not prepared to consume recycled water for purposes of personal use such as drinking. A recent study by Ransburg indicates the barriers that are posed by the public in regards to the use of recycled water. The barriers are either technical or non-technical. The technical barriers are the appropriate technical solutions that will be suitable to manage health risks. The acceptance of the public to the usage of recycled water falls under non-technical issues. Ransburg states that the reality is that despite the fact that sufficient and available information to substantiate the high-tech submissions of water treatment systems, the view of the public remains a major setback(Fereidoun Ghassemi, 2007, p. 288). The quality of water is among the major factors that people consider on the acceptance of recycled or desalinated water. The water that is recycled from the municipal wastewater consists of harmful releases such as chemicals from industries and organic compounds and human excrete. Also, there are biological materials such as pathogens, protozoa, impurities and viruses. The risk of treatment failure is usually likely in almost all the water treatment systems thereby reviewing these possibilities makes most people reluctant about the adoption of recycled water(Chris Binnie, 2008, p. 90). Cost and Environmental factors It is easier to convince the people to adopt the usage of desalinated water weather for purposes of contact usage or outdoor. In contrary, the cost of the desalination process is way too costly as compared to the normal fresh water. Besides, desalinated water is not environmental friendly since the energy consumption of desalinated water is very high thereby resulting in greenhouse gas emission and air pollution. The sucking of huge amounts of water from the sea endangers the life of tiny sea creatures such as plankton, babyish and other animals. Also, the removal of salt disposes of the brine concentration thereby harming aquatic life. Furthermore, the disposal of the removed salt is very harmful to plant life since it makes the soil lose its fertility. Despite all these negative environmental effects most people prefer using desalinated water over recycled water(Chris Binnie, 2008, p. 100). People will easily accept to drink recycled water without their knowledge. But telling them to drink recycled water however much it is clean will be impossible since it creates some negative psychological impact on them as they will be thinking that they are drinking water from their toilet. On the other hand, it will not be much hard to convince them to drink desalinated water. Only a few people do care about the source of water they are drinking, but to most people, the source is a major factor to consider. Socio-demographic factors Some belief in certain religions permits one to only drink water after performing some ritualistic process. Thus it is hard to convince the people to use or drink recycled water nor to convince them to go against their beliefs. Though in such communities, acceptance of desalinated water is not a big factor to them. Besides, the demographic factors such as age become a factor i.e. the aged h do have a weak immune system, and drinking recycled water may expose them to being vulnerable to illness. The engagement of the community is one of the toughest parts in the recycling and reuse of water. The community is essential in all the aspects since by getting the peoples problems; sound strategies can help to improve the decisions made which could turn out to be great .hence below are sound strategies that will help the adoption of recycled water(Chris Binnie, 2008, p. 116). Engaging the public from the onset i.e. the planning stages very essential in winning the trust of the public and gaining their confidence. This involves conducting of surveys, questions, seminars, studies and awareness programs this, makes the public to have more knowledge on the process. For instance in Toowoomba advanced water recycling plant, the authorities did everything from planning process design and implementation only to bring to the public notice after everything is done. The people could not buy the idea, and despite attempts to buy their trust, it failed terribly to the extent that protest groups and political influenced ensured the people wane and consequently the project failed(Fereidoun Ghassemi, 2007, p. 299). Before applying any strategy, there is need to get the opinions from the public and the current market scenario. These surveys could be in the form of online questionnaires. I .e in 2009; an online data survey showed that 3094 people out of 13884 invitations voted for acceptance of recycled water usage. The questionnaire was about their mindsets, beliefs, demographic views and social views and recycled water and reuse. This kind of survey helps to decide on which best strategy to apply Branding and marketing The branding and marketing are also a crucial factor in making the public to accept the recycling process. This entails providing an intricate elementary and the most striking statistics about the recycling plant. I.e. providing a preview of a film that encloses the best sections of the process. This makes the persons enthusiastic about the plan or the method. Thus the name of the plant for example green water will help to compensate the feeling of yuck thus building the publics confidence. This involves conducting of seminars and presentations where people share ideas and information regarding all data about recycled and desalinated water. If possible give a comparison of the recycled water and the water they use using a practical data base. Provided they will realize that the recycled water is superior to the one they are using theyll be more at ease in accepting it. Also, engaging the media by providing them with technical and qualitative information helps to publicize the plant. Lastly conducting of competition and in the process providing the participants with questionnaires helps to remove the misconceptions about the product(Fereidoun Ghassemi, 2007, p. 445). Conclusion Most people do not prefer recycled and desalinated water, but they would opt for natural water. The survey conducted shows that there is a gap in the knowledge of general purpose concerning the recycled and desalinated water. Most of them would prefer to use recycled and desalinated water for outdoor purposes such as agriculture but not in contact purposes such as bathing washing and drinking. This report showed the reasons as to why this happens and provided the best sound strategies that can be applied to make the process more successful and adoptable by the public. The results from the surveys and studies show that the people are more concerned about the health issues and the water source. The sound strategies such as creating awareness through the media, conducting seminars and technical knowledge sharing, engaging the public from the onset will help to eliminate the misconceptions about the product thereby increasing the confidence and adoption from the public(Gayathri Devi Meka la, 2008, p. 631). References Chris Binnie, M. K., 2008. Water Reuse,Scientific and Technical Report Series. 2nd ed. edinburgh: IWA Publishing. Fereidoun Ghassemi, I. W., 2007. Inter-Basin Water Transfer. 3rd ed. london: Cambridge University Press. Gayathri Devi Mekala, B. D. M. S. A.-M. B., 2008. A framework for efficient wastewater treatment and recycling systems. 2nd ed. sydney: IWMI.