Ecology Lab Essay Example for Free

Ecology Lab Essay The ecosystem is composed of the producers, consumers, decomposers and the nonliving or abiotic components (Ecology, 1997). The producers are the plants that produce food through photosynthesis. The consumers have two types: herbivores or primary consumers and carnivores or secondary consumers. The herbivores are the animals that only eat plants while the carnivores are the animals that only eat meat. The animals that eat mixtures of plants and meat are called omnivores. Human beings are considered as omnivores. Fungi and bacteria are some of the decomposers in the ecosystem. The nonliving or abiotic components of the ecosystem are consisting of the dead organic matter and nutrients found in soil and water. What if all humans became vegetarians? Would it be beneficial to the earth or ecosystem? First of all, let me discuss the principle behind the food chain, food web and energy flow. â€Å"In a food chain, the sun’s energy is used by plants to make food. The plants are eaten by herbivores, which, in turn, are eaten by carnivores. Both plant and animal substances decompose when they die and return mineral substances to the soil where bacteria use them to provide carbon dioxide gas. Carbon dioxide and the sun’s energy then enter the chain again. † (Food Chains, 1992) But the situation in the ecosystem is not as simple as stated in the food chain so it is more advantageous to use the principle of food web. For example, a rat ate a grain from a plant, and then the rat was eaten by a snake. But the snake was also eaten by a honey bunger. The honey bunger serves as an intermediate link which is a higher level of predator than the snake. This makes food web more complicated. Also, energy is transferred in a food web. This transfer of energy in a food web is called energy flow (Energy Flow, 2008). Energy flow involves several trophic or feeding levels. When energy is passed on from one trophic level to another trophic, about 90% of the energy is lost due to respiration and some are being lost as heat in the environment. The top consumer of the food chain is the one who receives the less amount of energy. Energy in the food web is measured in terms of heat. The law of thermodynamics is also used to measure the energy lost and gain by the trophic levels. Another concept that can be useful in answering the question is the ecological pyramid. â€Å"An Ecological Pyramid (or trophic pyramid) is a graphical representation designed to show the biomass or productivity at each trophic level in a given ecosystem. Biomass pyramids show the abundance or biomass of organisms at each trophic level, while productivity pyramids show the production or turn-over in biomass. Ecological Pyramids begin with producers on the bottom and proceed through the various trophic levels, the highest of which is on top. † (Ecological pyramid, 2008) The trophic level with the highest number of population is the producer while the top most trophic level has the lowest number of population. Would it be beneficial if all humans became vegetarians? The above principles and information can be used to answer this question. It would not be beneficial if all humans will be vegetarians since this act might cause imbalances in the food web and in the ecosystem. Humans also contribute in the maintenance of the numbers of species in a given ecosystem. If humans will only eat plants, the population of the animals we are eating like cows, pigs and chickens will grow. Since these animals are herbivores or primary consumers, this will result to greater competition for foods derived from plants. The population of secondary consumers will be outnumbered by the primary consumers. This will in turn cause another growth in the population of primary consumers since the number of secondary consumers will not be enough to feed on the primary consumers. Again, this will cause disruption of the ecological pyramid. In terms of energy flow and thermodynamics, it is still not beneficial if all human beings will be vegetarians. Given with two scenarios: (a) humans feed directly on plants and (b) humans feed on animals like cows or chickens that also feed on food from plant sources, in what scenario can humans receive greater amount of energy? In the first scenario, humans are included in the trophic level next to producers which are the primary consumers while in the second scenario, humans are considered as secondary consumers. Also in the first scenario, the humans’ only source of energy is the producer which is the food from plant while in the second scenario; the humans’ sources of energy are the animals and the plants that were eaten by those animals. Even though 90% of the energy acquired by the animals that feed on plants is lost due to respiration, there is still a remainder of 10% that the human can receive when he/she will feed on those animals. Summing up and comparing all the energies received by humans in each scenario then we can say that humans can get a 10% higher amount of energy in the second scenario than in the first scenario. Like what was stated prior to this paragraph, the top most consumer of the food web who feed on plants will receive the least amount of energy. Also in the first scenario where humans feed directly on plant foods, lesser amounts of heat and carbon dioxide are released in the environment. In terms of ecosystem productivity, the humans can get higher net productivity when they act as secondary consumers than when they act as primary consumers. What is net productivity? â€Å"Net productivity is the amount of energy trapped in organic matter during a specified interval at a given trophic level less that lost by the respiration of the organisms at that level. † (Ecosystem productivity, 2004) Humans can indirectly acquire higher net productivity when they eat animals that feed on plant materials. Using all the arguments mentioned, one can conclude that it is not beneficial, for both humans and ecosystem, if all humans will be vegetarians. We must always bear in mind that all things in excess will not be advantageous or beneficial. References â€Å"Ecological pyramid†. 2008. http://en. wikipedia. org/wiki/Ecological_pyramid â€Å"Ecology†. 1997. Funk and Wagnalls New Encyclopedia Vol. 9. 12 â€Å"Ecosystem productivity†. 2004. http://users. rcn. com/jkimball. ma. ultranet/BiologyPages/N/NetProductivity. html â€Å"Energy Flow†. 2008. http://en. wikipedia. org/wiki/Energy_flow â€Å"Food chains†. 1992. The World of Animals. Australia: Regency Publishing Group. 9

The Evolution of the Graphic Industry Essay Example for Free

The Evolution of the Graphic Industry Essay The development and continuous improvement of technology has incessantly provided new professional fields that emerged to cater to the intensification brought about by the web explosion and digital breakthroughs in the industry. The creative spectrum in the graphic industry has open doors to a large number of occupations which careers may in some way or another extend beyond one particular expertise. Visual communication is the medium used by the artists to provide people the distinction between graphic design, fine art and even advertising art. Different industries that make use of visual tools most of the time utilize almost the same theories, principles, practices, languages and even elements in delivering their client’s needs. The book â€Å"A history of graphic design† conveys that the industry’s main essence is to provide arrangement to information, form to designs, feelings and expressions to a work of art which primary output is the documentation of human experience (Meggs, 1983). The graphic industry’s professional fields have high-racketed immensely that make way to the diversity of graphic designing jobs. The workforce in the graphic design business which holds the management related roles are creative directors, art directors and art production managers. Hands-on designers in the fields are logo designers, brand identity developers, visual image developers, illustrators, content developers, multimedia developer, visual journalists and layout artists. The web explosion and advancement opened its doors to interface layout artists and web designers usually employed by web development companies. Web design may entail collaboration of graphic designers and software engineers. Programmers are also in demand in the field of web development to provide their expertise in doing advance coding. Web masters are positions that specialize in both programming and web design. While traditional graphic design and interactive design both adhere to provide better physical facade, the two have distinguished characteristics from the other. At all times, traditional graphic design’s main purpose is to carry out an attractive application of an object. It is relatively eye-catching and bold. The layout of this kind of design deals primarily with the style treatment and array of a print’s content. The interactive design on the other hand, is mainly the design used in appliances, machines, CD software applications, mobile communications, computers and even websites which focus intensively on the user interaction and experience. It aims to proficiently deliver to a user an interaction that is both efficient and simple. Interactive design is also referred to as user-centered design. Traditional graphic design is utilized to please the eyes of each and every observer. It is highly used in logo design whereas it uses a process of sketching through thumbnails and rough drafts prior to hybrid process (Gregory 48). Interactive design process balances the visual elements with regards to the operational mode and the functionality of the system to make it usable and make it easily adjust to the user’s changing requirements and needs. Interactive design is widely used in the web. Web page designs give the internet users an active role in accessing what they need online. The more user-friendly a site is the more it is visited. The interactive design reflects lucid pathways to the information, products and tools a user necessitates. Design is fundamental to the success of most services and products released by a company. Both the graphic and the interactive design of a product and affect the consumer experience which directly and enormously affects the business success or failure. The profound impact of design is apparent as dictated by the developments in technology. Works Cited Gregory Thomas, How to Design Logos, Symbols and Icons: 24 Internationally Renowned Studios Reveal How They Develop Trademarks for Print and New Media, April 2003, pp:48 Meggs, Philip B. , A history of graphic design. New York: Van Nostrand Reinhold, 1983

Uk housing market

Uk housing market 1.INTRODUCTION 1.1Introduction 1.2A brief history of the UK housing market 1.3Aims The aim of this research project is to compare and evaluate the variables that affected the FTBs accessibility to the housing market over the last 40 years. 1.4Objectives The first objective is to establish the factors that have affected the rise in house prices other the last 40 years. The second objective is to review and evaluate how the property market has changed over the last 40 years with respect to affordable housing, and what impact this has had on FTB statistics. The third objective is to review and analyse the change in Private Lender schemes over the last 40 years, and the affect this has had on FTB statistics. The fourth objective is to review the relationship between variables such as life expectancy, retirement age, size of families, wages etc and their overall effect on FTBs accessibility to the housing market. The fifth objective is to conduct questionnaire surveys using a sample of FTBs to establish the publics perspective on affordable housing. The sixth objective is to conduct questionnaire surveys using a sample of FTBs to establish the most common method used. 1.5Definitions 1.6 First time buyer: Is a phrase commonly used to identify someone who would be buying a house for the first time. Average house price: The average price that a house would sell if placed on the market, this price would fall between the bottom 50per cent of house prices and the top 50per cent. Average household income: The combined average gross household income, from sources such as wages, salaries and various sources of investments. Key worker: A public sector worker, linked to professions such as, NHS staff, police officers, teachers, social workers, fire fighters, local authority planners and prison officers. House Price to income ratio: The ratio of median house prices to median incomes. 1.5 Abbreviations FTB: First time buyer HPIR: House price to income ratio CIS: Cash Incentive Scheme RTA: Right to Acquire RTB: Right to Buy 2.LITERATURE REVIEW In order to compare and evaluate the variables that affected the FTBs accessibility to the housing market over the last 40 years, it is necessary to review existing published work. Due to a lot of the published works, which were gained from the library not being up to date, the literature review is mainly based on reports and articles which were gained from online sources. In order for the information that is gathered to be analysed in the most effective manner it will be divided into the various sections: Factors that have affected the rise in house prices other the last 40 years. Changes in the property market over the last 40 years with respect to affordable housing. Changes in the private lender schemes over the last 40 years. Variables affecting FTBs accessibility to the housing market. In the late 1980s and early 1990s the British housing market experienced unprecedented changes and raised heightened concerns over the affordability of many to gain access to the property market, due largely to rising house price to income ratios, which has been labelled as a ‘crisis of affordability in housing provision (Maclennan, Williams, 1990, p. 8). It is only rather recently that ‘affordability has become a common term in housing policy in Britain (Whitehead, 1991),and for this reason the meaning of ‘affordability has caused much confusion, and since the Government has given no specific definition for the term, the following definition has been sourced ‘Affordability is concerned with securing some given standard of housing (or different standards) at a price or rent which does not impose, in the eyes of some third party (usually government) an unreasonable burden on household incomes. (Maclennan, Williams, 1990, p. 9) 2.1 Factors that have affected the rise in house prices other the last 40 years. It has become apparent in recent years that the rise in house prices has become a major issue within the UK, which has resulted in First Time Buyers (FTB) finding it difficult to gain access to the property ladder. The problem faced by rising house prices has been imminent for a long time, but up until the last decade this problem was mainly confined to London, the South East and a few regional hot spots (Department for Communities and Local Government [DCLG], 2006, page 6). But by looking at more recent figures it has become apparent that high house prices have become a more wide spread problem, with particular emphasis on rural districts, and smaller settlements (DCLG, 2006, page 6). Though there has already been a vast amount of research and study on the subject of affordable housing within the UK, namely the Barker review (2003), whose principal reasoning behind the problem was largely focused on a poor planning system and constraints on housing supply. Little information was sourced on the drivers and factors which play a major role in determining UK house prices, which will be the principle aim of this section of the literature review. By analysing literature and data collected from published works this section of the literature review will examine the various factors that have played a contributing role in the rise in house prices within the UK. These include: Interest rates Supply and demand Rise in population and increasing number of households Income Buy to let market Unemployment Confidence 2.1.1 Interest Rates Many scholars believe that there is a direct link between house prices and interest rates; however the focus of this report aims to suggest, that in fact it is the affordability of housing and public confidence which is instead affected by alterations in interest rates, which in turn leads to changes in house prices. For example, a rise in interest rates would lead to increased monthly repayments on mortgages, as mortgage repayments rise, the prospects of buying a house becomes less attractive, thus leading to a decline in demand for houses and fall in house prices. On the other hand when interest rates are lowered, this would lead to a fall in mortgage repayments, public confidence and demand is likely to rise at this point leading to a rise in house prices. If interest rates were to continue fall in this manner so would house prices, until the housing market reaches a state of oversupply. McQuinn and ORiley (2006) suggest that lower interest rates mean that mortgage repayments are lower and hence the house purchaser can potentially borrow more. This would also lead to an outward shift in the demand curve with prices increasing. ‘The fall in UK interest rates (and unemployment) over time has had two linked effects. It has brought the cost of borrowing down sharply, leaving lenders (and borrowers in terms of pressuring for) with the dilemma as to whether to increase the multipliers applied (i.e. up from three times loan to income ratio- LTI) which in turn has increased demand and through that house prices (Forest, Lee, 2007, p. 168). 2.1.2 Supply and demand Supply and demand is defined as, ‘the quantity of goods available for sale at a given price, and the level of consumer need for those goods. The balance of supply and demand fluctuates as external economic factors (such as the cost of materials and the level of competition in the marketplace) influence the level of demand from consumers and the desire and ability of producers to supply the goods (BNET, 2010) Kate Barker, a member of the Bank of England monetary policy committee, was commissioned by the Treasury to examine housing supply (Guardian, 2008) and establish why house prices in the UK are rising so fast. Within the report she established that the main reason was due to the supply of housing not keeping up with demand, which she put down to the increased growth in population (Barker, 2004). In an article for the Mirror Martin Ellis, housing economist at Halifax puts it best by saying â€Å"unless we can get the supply and demand in balance then that is going to lead to more upwards pressure on that ratio of prices to earnings.† (House prices ‘have quadrupled, 2010) Data collected from the ODPM revealed that housing supply in the UK is currently growing at 150,000 new homes each year, in comparison to the 190,000 new households each year. This shortfall of 40,000 new homes which would be needed, in order for supply to meet demand, could be a significant factor in the currently rising house prices (Office of National Statistics, 2008). In speaking to the Estates Gazette (EG) Yvette Cooper, the former housing and planning minister, revealed that in order to keep up with demand 200,000 new homes would need to be built each year (EGI, 2005), with 3 million new homes built by 2020. However with the credit crunch having just hit and the uncertain state the economy is in, it is looking less and less likely that the Government will be able to meet these targets. 2.1.3.Rise in population and increasing number of households As previously mentioned supply and demand of houses has a direct effect on house prices; the aim of this section of the report is to establish how changes in the population can in turn have an effect on supply and demand of houses. It is a well known fact the UKs population is gradually growing; there have been various contributing factors to this, but the main reason is longer life expectancy. The average life expectancy of a male in the UK has risen from 67.1 in 1970 to 77.53 in 2008, and females life expectancy has risen from 74.7 in 1970 to 81.74 in 2008 (Office of National Statistics, 2008). The rise in household numbers isnt solely the result of the rise in life expectancy, theres also a variety of different demographic factors which have contributed. These include: 2.1.3.1. Divorce rates. According to the Office for National Statistics, in 2008, the divorce rate in the UK stood at 11.2 divorcing people per 1000 married; this is in comparison to 6.1 in 1971, which is a 46 per cent increase. With the amount of couples getting divorced increasing, so too will the number of households, pushing demand up (Office of National statistics, 2008). 2.1.3.2. Decline in number of marriages. The increase in the number of households in the UK can also be largely explained by an increase in the mean age that couples are getting married. According to the Office for National Statistics the mean marriage age in the UK has increased from 27.1 in 1970 to 35.6 in 2003 (Office of National Statistics, 2006). With the general public opting to marry at a later stage in their life the number of households is likely to increase; as explained before an increase in the number of households is likely to lead to increase in demand for houses, which will in turn lead to a rise in house prices. 2.1.3.3. Major influx of immigrants. Migration is an important factor in the changes in the UKs population over the last 40 years, when inward migration is greater than outward migration; the population would rise at a higher rate. According to the Office of National Statistics 518,000 people immigrated to the UK in 2009, whereas 370,000 emigrated, giving a net migration figure of 148,000 (Office of National Statistics, 2009). 2.1.4 Income According to McQuinn and OReilly (2006), rising income will mean that borrowers can borrow more on the basis of higher income and hence bid a higher price for a property, thus the demand curve for housing will shift outwards with prices increasing. It is also suggested that higher household incomes will result in households having more disposable income, which in turn will lead to increase in normal and luxury goods, since it is assumed that housing is a normal/luxury good, it can also be assumed that demand for housing will increase, and so too will house prices. Keynes best describes this theory as â€Å"The fundamental psychological law, upon which we are entitled to depend with great confidence both a priori and from our knowledge of human nature and from the detailed facts of experience, is that men are disposed, as a rule and on the average, to increase their consumption, as their income increases, but not by as much as the increases in their income (The General Theory, 1936, p.96) In their book ‘Booms and Busts in the UK Housing Market Muellbauer and Murphy suggest that income growth alongside predicted income growth can lead to an increase in public confidence to spend disposable income; this increase in public confidence, respectively lead to a rise in house prices, through demand rising. There has been a marked increase in the number of women in paid employment in the past 60 years (Hogarth et al., 2001) there are a variety of different reasons for this, but one of the most significant would be the introduction of the Equal pay Act 1970. With many households now having two incomes they can arrange for a joint mortgage, which in effect means they can bid up house prices. 2.1.5.Buy to let market Buy-to-let (BTL) mortgages are where an investor purchases a property for purpose of renting it out; the investor rents the property out to tenants with the intention of using the money from the rent to pay off his mortgage, with a possible excess which would be kept by the landlord. The landlord would also be looking to make a capital gain on the property over its life time making it a very good investment. Since July 1996 when the Association of Residential Letting Agents (ARLA) launched BTL loans, there has been an explosion of investors entering the market hoping to get both income and capital gains from their investment. According to Paragon Mortgages, BTL now accounts for around 14% of the mortgage market (Stepek, 2007, para. 4) According to the Council of Mortgage Lenders (CML) buy-to-let mortgages outstanding continue to rise, in 2008 there were 1,103,000 BTL mortgages in the UK worth  £132.5 billion, which is a rise of 19% by volume and 25% by value from a year ago previous (CML, 2008). This surge in investors entering the BTL market has been in part due to the soaring house prices of the late 90s, but also largely due to relaxation in the lending criteria , the CML have revealed that in 2008 on average, lenders would offer a maximum loan of 83% on the value of the property (CML, 2008). However with more and more investors looking to make an easy buck, upward pressure is being put on demand, resulting in house prices to rise. To add to this, investors have predominantly been buying up smaller homes, consequently making it harder for FTBs to even get small premises. 2.1.6 Unemployment With unemployment at its lowest since the 1970s (http://www.number10.gov.uk/Page15026), there is more people with the potential to gain a mortgage and enter the housing market, this upward pressure on demand is turn going push house prices up. Armstrong and Taylor suggest that, low unemployment leads to higher wages, which in turn lead to an increase in demand for housing and hence higher house prices (Armstrong, Taylor, 2000, p. 208) 2.1.7 Confidence ‘In analysing the ingredients that have contributed towards the recent strong growth in house prices analysts have consistently made reference to the strength of consumer confidence. The implication is that consumer confidence positively impacts upon house price growth. (Report on confidence) Garratt goes on to say ‘While consumer confidence is not a significant factor in driving household consumption, it does have a role to play in influencing the willingness of households to undertake secured borrowing. (report on confidence, look in my docs for file) ‘Speculative demand for housing draws new buyers into the housing market on the expectation of future price increases and associated capital gains. The extra level of demand funded mainly through mortgage finance adds to the existing level of mortgage debt but the speculative demand creates a ratchet effect whereby expectations of higher prices leads to an increase in demand which sends actual house price higher ‘ (Riley, 2005, p. 73) Due to the extreme rise in house prices of the mid 90s, public confidence in the housing market grew (further explained in chapter?), which led to a rush in people purchasing property with the expectation of trying to get a piece of the action, which has caused greater demand for houses, pushing prices up. 2.2 Changes in the property market over the last 40 years with respect to affordable housing. In order to establish how the changes in the property market over the last 40 years, with respect to affordable housing has affected FTB statistics, it is first important to discuss the development of affordable housing within the UK. This will enable FTB statistics to be compared to a time-line of these developments, giving an impression of their effectiveness. 2.2.1 Right to Buy In past history a lot homes in the UK would have been council owned, but since the 1980s the proportion of council owned homes has diminished instead favouring towards providing support to various other forms of social housing. In 1980, under power of Margaret Thatcher the 1980 Housing Act introduced the Right to Buy scheme (RTB), which offered council tenants (of three years tenancy) the right to buy their council house, with discounts up to 50per cent, which in 1986 went up to 70per cent for flats (Power, 1993, p. 217). The RTB scheme has faced lots of criticism since its introduction, said to favour the more affluent home owners rather than the poorer more in need (King, 2006, p. 68). However if we were to look at the policy and whether it met its initial aims, the RTB could be viewed as having been very successful; over the past 25 years the RTB scheme has helped broaden owner occupation, particular to the working-class and helped break up municipal housing (King, 2006, p. 68). However it has also been argued that the RTB scheme has lead to a shortage of social housing available, largely due to Government edicts which have prevented councils from spending the proceeds of sales of social housing on new housing (Hallett, 1993, p.230). Accompanied by an increase in demand for affordable housing, this could be a major contributing factor in rise of house prices. 2.2.2 HomeBuy Schemes 2.3 Changes in the private lender schemes over the last 40 years. This section of the literature review aims to look at how, changes in credit available to consumers in the UK has played a role in the increase in house prices over the last 40 years. Aoki, Proudman and Vlieghe (2002, p.10) suggest that credit frictions may be important in understanding the relationship between interest rates, house prices, housing investment and consumption and found that significant effects of households access to credit on consumption and on housing investment in UK aggregate and regional data. Over the last 40 years credit constraint has seen some significant changes, with access to credit more easily available to consumers. This can be largely explained by the removal of exchange controls in 1979 and bank lending in 1980, it can be further explained by the Building Societies Act 1986, which lifted the restrictions on how building societies operate, which gave them the same status as banks (Aoki, Proudman and Vlieghe, 2002, p. 14). Other significant changes in the last 40 years include the inclusion of non-bank entrants such as department stores, retailers and insurance companies in offering credit through services such as credit cards, unsecu red loans and mortgage products. Furthermore an increase in internet banking in the 1990s and better credit scoring methods also contributed to better credit conditions (Muelbauer, 2005, p.5). In the 1970s and early 1980s building societies collectively agreed the mortgage and deposit rates they offered (Aoki, Proudman and Vlieghe, 2002, p.14), but due to relaxation in lending criteria and increase in competition between the lenders, the setting of interest rates have been a far more competitive, which has led to lower interest rates for consumers. Interest rates can have a direct effect on the supply of mortgage loans, which in turn will affect house prices. According to the financial money group moneyfacts.co.uk, there are currently 2,003 different mortgages available on the market (Burridge, 2010, p.1), the result of this increase in competition, is the reduction of the cost of borrowing , which in turn will encourage more people to take out a mortgage. This increase in demand, as explained before will have an adverse effect on house prices. 2.4 Variables affecting FTBs accessibility to the housing market. This section of the literature review aims to establish the various variables that have affected FTBs accessibility to the housing market; this will be done through the analysis of various scholars opinions on the subject matter. It has become apparent in recent years that the rise in house prices in comparison to incomes has become a major issue within the UK, which has resulted in FTBs finding it difficult to gain access to the property ladder. As a result of incomes not rising at the same rapidity as house price inflation, the principle problem for FTBs is affordability; in the last 20 years the average price a FTB is expected to pay has increased by 294 per cent, â€Å"with the average UK property now costing five times the average earnings of a full-time male employee† (Chesworth, 2004, p. 2). To help emphasis the problem that FTBs face this dissertation will examine the rise in house prices in comparison to income since 1970; in a study by Alliance Trust Research Centre they compared the problem facing FTBs with that of their parents when they tried to buy their first property (Alliance Trust, 2006). According to the study house prices have risen from 2.5 times the average income in 1970 to 3.9 times the average income in 2005, equating to a 60 per cent increase in house price to income ratio (Alliance Trust, 2006). The average household income is  £38,302, and the house price index report shows that the average house price in the UK is  £197,000, meaning the house price to income ratio is about 5.1. These historically high figures mean that young FTBs are finding it increasingly difficult to gain access into the property market and can often lead to FTBs having to take on risky mortgages, for example interest only schemes. This can result in high household debt, which currently stands at 150 per cent of household income (Ratio of House Prices to Income, 2008). Though more recent data collected in November 2008, from the price index published by Nationwide Building Society has revealed that house prices are currently on a downward descent, FTBs are still finding it difficult to purchase their first home (CML, 2008). Though FTBs ‘loan-to-value ratios have been going down, with the average FTB taking a loan out on 84per cent of the value of the property in comparison to 90per cent in 2007 (CML, 2008). This is merely the result of lenders lowering the amount that they will lend; in previous housing climates borrowers were able to take out 100per cent mortgages, but with the downturn in the market, lenders are requiring a substantially larger deposit. This subsequently has meant that FTBs are now faced with the prospect of having to find a larger deposit; the research revealed that the average FTB deposit rose from  £15,000 in 2007 to  £19,000 in 2008 (CML, 2008). Talk about a lot of FTBs in the past would have got the money for the first house from inheritance, from parents and grand parentsbut due to longer life expectancy this isnt always available. As discussed in chapter? Late marriage can not only have an effect on housing demand, but can also play a part in FTBs accessibility to the housing market. With a lot of people opting to buy their first house once they are married With the mean average age that people are getting married in the UK rising from 27.1 in 1970 to 35.6 in 2003, As already discussed in chapter? The buy to let market has led to a massive in surge of investors buying up houses, it is typical that these investors will be buying up smaller typical FTB houses, with demand for these houses going up so will price, making it harder for FTBs to gain access to the market. More luxury goods available people spending their money on other things Sudden drop in house prices has led to parents being less likely or able to assist their kids in purchasing their first property due to their investments (house) taking a massive drop. Jobs less stable in the past people had jobs for life Contract employment; less people on full time 3.METHODOLOGY 3.1 Research Strategy The aim of this research project is to compare and evaluate the variables that have affected the FTBs accessibility to the housing market over the last 40 years. In order to come to the best conclusion to this, it is essential to gather data. This chapter aims to provide a description of how this data will be gathered, and the particular research methods that will be implemented. The data collected can be split into Primary and Secondary data. ‘Secondary data consists of information that already exists somewhere, having been collected for another purpose. Primary data consist of information collected for the specific purpose at hand. http://books.google.co.uk/books?id=6T2R0_ESU5ACpg=PA335dq=what+is+primary+datalr=cd=1#v=onepageq=what%20is%20primary%20dataf=false 3.1.1 Secondary Data Since the basis of this investigation, is to analyse house prices over the last 40 years and the effect this has had on FTBs accessibility to the housing market, secondary research will be very useful, mainly due to the extensive amount of information and data already available. The bulk of the secondary data collected has been sourced from journals, reports and websites of professional bodies. However, due to the fact that a lot of the information gathered has the potential to be bias, a variety of different sources will be used and then compared. The majority of the information gathered will be statistical data, which will include economical statistics, demographical statistics and housing market statistics; this will enable an analysis of the factors and variables that affect house prices and to spot any trends. Though a lot of these statistics were included in the literature review, the aim of the next chapter is to give a more specific investigation and data analysis. Secondary data includes: Academic Journals Internet Sites and Web pages Textbooks Newspaper Articles Other Academic Studies 3.1.2 Primary Data In order to gain the views and opinions of the housing market, questionnaires will be conducted using a sample group of home owners and non home owners. These questionnaires will be conducted using social networking sites, the advantages of using this method is, low cost of data collection and processing, ability to get a wider return rate from all over the country and the disadvantages to using this method is that it allows for errors to be made due to misunderstandings of the questions or lack of knowledge on the subject. So for this reason the questionnaires have been designed in the simplest manner. Another drawback to using questionnaires is that they may not provide an accurate view of the housing market, since only a relatively small sample group was used, it is possible that the information that is gathered may give a distorted view and conflict with the secondary data. Had there been more time it would have been beneficial to the investigation to carry out a questionnaire using a much larger sample group, giving a more accurate representation. To further the research even more it could have been very advantageous to have set up interviews with the governing bodies responsible for setting Government policy on housing and interest rates. Implementing these two methods along with the research already carried out would have allowed for opinions from both sides. 3.2 Literature Review With the aim of keeping the literature review as orderly and concise as possible, it was divided into four distinct sections, these sections are listed below. Factors that have affected the rise in house prices other the last 40 years. Changes in the property market over the last 40 years with respect to affordable housing. Changes in the private lender schemes over the last 40 years. Variables affecting FTBs accessibility to the housing market. The literature review provided an overview of the factors that have affected house prices over the last 40 years and variables affecting FTBs accessibility to the housing market. Though this research gave a good outline of the broader issues at hand, the literature review alone is insufficient in meeting the aims of the study, so for this reason it is paramount that further investigation is undertaken. 3.3 Timeline Carrying out the literature review bought forward the possibility of creating a timeline of changes in the housing market over the last 40 years. The basis of the timeline will be creation Government policy related to housing, as well as any significant changes in private lender schemes over the last 40 years. By analysing this timeline alongside statistics and data gathered from the secondary research, along with the responses from both questionnaires, direct correlations can be examined. 3.4 Questionnaire As already stated questionnaires will be sent out to two different sample groups, home owners who bought their first house over the last 40 years and non home owners. This will give a reflection on the UK publics perspective of the housing market. The structure of both questionnaires is shown below: 3.4.1 Questionnaire: Property owners Q1. GENDER Male: Female: Q2. MARITAL STATUS AT THE TIME OF BUYING YOUR FIRST PROPERTY Single: Married: Other Q3. AGE 18-30: 31-40: 41-50: 51-60: 60 and above: Q4. WHICH AREA OF THE COUNTRY DID YOU PURCHASE YOUR FIRST PROPERTY? North: North West: North East:

Essay --

Blade Runner is exemplified as a dystopia that predicts a future city that sustains corporate capitalism’s worst features, such as urban decay, extreme gaps between wealth and poverty, and authoritative police work. The film depicts an urban city that, due to capitalism, coalesced into a polluted, overpopulated city controlled by monopolies. Roger Ebert describes the city, Los Angeles, in the film as, "The skies are always dark with airborne filth in this Los Angeles of the future. It usually rains. The infrastructure looks a lot like now, except older and more crowded." He believes the film has "one of the most extraordinary worlds ever created..." and gives it the honor of joining his greatest movies collection. This film is a multi-genre film— science fiction and film noir— which creates a very unique stylistic world. The film is characterized in the science fiction genre with flying vehicles— police cars and advertising blimps—, the futuristic city with congested streets, and advanced technology—picturesque billboards, Voight-Kampf machine, picture phones, and voice activated photo analyzers. It also depicts the movie genre of film noir with its low-key lighting consistent throughout Bryant’s office and Deckard’s apartment, the claustrophobic framing with various characters—the overcrowded nightclub—, heavy shadows caused by venetian blinds in Deckard’s apartment, and the rain soaked landscapes during the night. The scene I chose takes place after Deckard has â€Å"retired† two replicants, and has discovered the location Roy Beatty and Pris. The scene follows Deckard as he hunts down Pris, right before the final encounter where he battles Roy. I chose this scene for its attention to detail and captivating visual aesthetic. It ... ...l map of the location in our minds. This suspense continues to build until he meets Pris and she attacks him. The cuts get immediately more frequent and induce a feeling of shock and surprise in the audience. Framing is another way Ridley Scott compares the futuristic to the classical. For example, in the opening shots of this scene, the landscape depicts one of the main themes of the film— a relationship between classical and futuristic. In the establishing shot of this scene, European style apartments cover the foreground and the neon city landscape dominates the background. This separation of the buildings shows the divide between the old and new societies in the film. While the two building are far apart in reality, the camera creates the illusion that they are side by side and places Deckard in the middle, giving him a choice between the familiar and unknown.

Womens Sports Fighting for Recognition in Boston :: Athletics Athletes Papers

Women's Sports Fighting for Recognition in Boston Competing in a city long sidled with a racist reputation, sports teams and organizations in Boston have long worked toward equality, or at least a perception of it. But in the past few decades, a new battlefield has emerged in the sports-mad city's culture war - women's sports. This fresh fight, taken up recently by a professional soccer organization and Title IX-backed activists at Boston's many colleges, isn't so much against anti-inclusive bigwigs - modern day Yawkeys - but against norms, financial constraints and fan interest. The women don't have to prove they have a right to play. They have to prove they can - and people will watch. WUSA: "Working to Reorganize" The Women's United Soccer Association (WUSA) started with big dreams, but thin pocketbooks. Around the time of the 1999 Women's World Cup, plans were being formulated to start the United States' first ever women's professional soccer league. When the U.S. won the Cup before record crowds and jaw-dropping television figures, it was final. There would be a league, with most of the U.S. Cup roster spread between eight teams, including squads based in Boston, Atlanta, Washingon D.C. and Philadelphia. The WUSA opened its doors in 2001 to much fanfare - and heavy attendance. Boston's entry, the Breakers, drew 8,101 fans a game, and Washington led the league with a 14,421 average. Emotionally, things were great. Financially, things weren't. Though investors had put nearly $100 million into startup costs, only Hyundai and Johnson & Johnson signed on as major corporate backers. Still, the league survived, but only for a while. A business plan that called for heavy corporate sponsorship didn't pan out, and by the September end of the 2003 season, the circumstances were so dire that WUSA executives announced the league was ceasing operation, effectively immediately. As if to complete its "ashes-to-ashes" flavor, announcement coincided with the start of the 2003 Women's World Cup. "We had some great sponsors," WUSA commissioner Tony DiCicco said. "The way our previous business plan worked, we had to reach a certain number for sponsorship. We knew that after tickets and licensing, we needed this much in sponsorship, and this much from investors. We weren't reaching the number in sponsors, therefore investors had to put in more money." In the league's three-year run, Boston showed it can support a major professional women's soccer team as well as any city.

Teenagers, Computers, and Literacy :: Personal Narrative Education Essays

Teenagers, Computers, and Literacy My sister, Tiffany, is a senior at County High School in Smallville, Ohio, a suburb of Colombus. She is expected by teachers and peers to be able to communicate effectively with the use of computers. Through her daily interactions with the computer due to schoolwork and conversing using Instant Messenger, her literacy practices have been affected. On an average day, Tiffany spends thirty minutes reading on the computer. This includes reading emails, reading information from websites, and reading for homework. For an additional ninety minutes per day, her computer-based reading is devoted to reading responses from her Instant Messenger conversations. This time is also shared with computer-based writing as she types her own responses to her online conversation. She typically spends an additional hour writing on the computer for typing homework, papers, or emails. Tiffany feels that her time spent reading and writing on the computer has affected her literacy in a positive way. She is able to read faster and more efficiently. â€Å"I have learned to type faster and become more aware of what I am typing. Since I have spent a lot of time reading on the computer, it has helped me become a faster reader and helped me learn to skim through trivial information.† This is understandable because with any kind of reading, the more you practice it, the better you become at picking out the main ideas and focusing on the important points. The computer has affected Tiffany’s writing skills in a positive way. When writing a compositional paper, she is able to utilize the computer’s assets to improve the quality of her writing. The use of the Thesaurus function has made her writings seem more professional. It is much easier to use the Thesaurus function on the computer than having to refer to a book. This works for Tiffany when she is unable to pinpoint the exact word that she is looking for, but it may not work for everyone. She is also able to refer to online resources while writing a research paper. The availability of an online encyclopedia is beneficial when gathering information on a topic. Also, the ability to refer to other Word documents, sometimes notes saved on another file, increases her productivity when writing a paper. With so many positive attributes of the computer, there are also some drawbacks. Tiffany finds that her ability to compose creative writing is hindered because of the computer.

The Kenya Flourspar

The fluorite (CaF2) deposits were discovered by prof. Al Amin in 1967 in the areas of Kimwarer, Choff and Kamnaon. He was searching for semi-precious stones, and initially mistook the purple fluorite for gemstone. He therefore collected the sample and took them for analysis in Mombasa. It was later found to be fluorite.A hand-mining operation was started and the fluorspar was supplied to the Bamburi Portland Cement Company in Mombasa. At its peak, the operation, which relied on donkeys to transport the fluorspar, produced around 400 tons per month of high grade fluorspar. In 1971 the Fluorspar Company of Kenya (FCK) was established, under the auspices of the Kenya government, to exploit the deposits on a larger scale. Crushing and jigging plants were later put up at mining site for large scale production of the metallurgical grade. Kenya fluorspar was a state parastatal upto 1996 when it was privatized.It is currently owned by local and foreign investors. The company has seven active mining sites available from which ore can be mined depending on the grade and quality required. In 2003 the company obtained made a major investment in earth-moving equipment and plant upgrading. The deposit has been commercially mined since 1971. Initially, metallurgical grade fluorspar was produced. In 1975 a 100,000 ton per annum acid grade fluorspar concentrator was commissioned and by 1979 metallurgical grade fluorspar was no longer produced as primary product, but can still be produced as secondary product for smaller consignments.The Kimwarer ore deposit has now been mined for over 35 years It is an EPZ (Export processing zone). LOCATION Kenya Fluorspar is a concern based in the Kerio Valley in the district of Eldoret and Iten. FORMATION OF FLOURITE (CaF2) The fluorite is an industrial mineral formed 150 to 200 million years ago. It is formed by replacement reaction known as mesomatism. The magma or hot water containing fluorine and other minerals was forced up from deep wit hin the Earth. When this brine reached the calcium rich, limestone bedrock (CaCO3), fluorite crystals formed along the walls of fractures and voids in the rock.Flat layers of fluorite also formed parallel to the limestone beds, replacing the host rock. The fluorine replaced the CO32- from the CaCO3 to form CaF2. The CO32- was dissipated as CO2 and water. This process is further elaborated in equation below: Ca2- + F22- CaF2 (fluorite) GEOLOGY AND OCURRENCE Fluorite (also called fluorspar) is a halide mineral composed of calcium fluoride, CaF2. It is an isometric mineral with a cubic habit, though octahedral and more complex isometric forms are not uncommon. Crystal twinning is common and adds complexity to the observed crystal.The fluorite deposits are believed to be of hydrothermal origin in the Post-Miocene era when lavas formed a protective cap over Precambrian rocks in the area. The main deposit of fluorite is located at Kimwarer and is exposed on a series of five hills, four of which have been mined. Two other minor deposits knows as Choff and Kamnaon are approximately 2 to 5 km north of the present mine site and have been partially mined in the past for the production of metallurgical-grade spar. The Kimwarer ore bodies contain by far the largest ore reserves. The ore body contacts are distinct due to the buff colour of the ore in contrast to he grey gneiss, white marbles or pegmatites. Typically the fluorite is finely crystalline and disseminated through a siliceous matrix. Zones of high grade ore are often purplish or creamy yellow in colour with cavities filled with distinct cubic crystals. The Choffs have two ore bodies running parallel to each other for more than 3 km. The Choffs are separated by ridges and dips. The ore body pinches and swells and its width varies between 4 metres and 26 metres. This ore is soft and friable hence easy liberation in the plant and provides a good yield. The phosphate in this vein is medium to high.The Kamnaon ore bod y has more than five partly parallel veins with varying dips of between 35-45 degrees. There are a number of other sites which are yet to be explored. The Fluorite at Kerio Valley occur as a vein deposit, especially associated with galena, sphalerite, barite, quartz, calcite and metallic minerals, where they often form part of the gangue (the surrounding â€Å"host-rock† in which valuable minerals occur). It is a common mineral in deposits of hydrothermal origin and has been noted as a primary mineral in granites and other igneous rocks and as a common minor constituent of dolostone and limestone.The deposit at Kerio Valley is steeply diping at 40o, with strike varying with mine: Mine| Strike| Percentage CaF2| No. of mines| mines operating| Cheberen| North-South| 37%| 1-6| 1and3| Kamnaum| North west-South east| 40%| 1-5| 1| Choff| East-West| 50%| 1-12| 6and9| The deposit is stratified from Kamnaum to Cheberen1. The fluorite is polychromous i. e occurs in different colours dep ending on the trace elements. The different colours include: * Colourless * Orange * Green * Purple * Base yellow. GRADES OF FLOURSPAR The fluorite can be processed into grades depending on the use: 1.Acid grade: This grade is used in the manufacture of Hydrofluoric acid (HF). 2. Metallurgical grade: This grade is used as flux in steel and cement industry. 3. Ceramic grade: This grade is used in the manufacture of ceramics. Only the acid grade is currently produced by Kenya Fluorspar. Metallurgical grade was also produced but stopped. MAJOR IMPURITIES AVAILABLE IN FLUORITE 1. Silica (silicon dioxide), SiO2 2. Calcite (calcium carbonate), CaCO3 3. Phosphorus pentaoxide , P2O5 4. Iron(III)oxide, Fe2O3 STAGES IN MINING AND PROCESSIG OF FLOURITE (CaF2) 1. Exploration 2. Overburden removal 3. Mining . Processing EXPLORATION This is normally done to obtain sufficient information about the deposit in order to enable a safe and economic design and to avoid difficulties during mining of the fluorite. The Kenya Fluorspar utilizes the diamond core drilling machine to obtain the drill cores. This machine can drill upto 140m-180m depth. The drill cores are then logged upto beyond the fluorite zones. The drill cores are then taken to laboratory for testing. The cores undergo through assessment, determination and classification. Diamond core drilling equipment. LAND CLEARING AND OVERBURDEN REMOVALLAND CLEARING This involves the removal of all the trees and stumps including the roots from the mining site. In Kenya Fluorspar, currently land clearing and overburden removal is done at choff 9. The main equipment used for land clearing at choff9 is a D355 Komatsu tractor-mounted dozer. The brush is disposed by dumping in gullies. D355 dozer. OVERBURDEN REMOVAL This involves the removal waste soil or rock that overlies the ore. At Kenya Fluorspar the overburden depth depends on the stripping ratio and dipping angle. Dozer is the main equipment used for stripping the overburden at choff 9.This equipment pushes the overburden over the high wall. After the overburden has been stripped by the dozer, it is loaded onto trucks by a hydraulic hoe excavator for dumping in gullies. The waste is then pushed into gullies by the D355 dozer. Overburden is removed at a ratio of 3:1 to 8:1 (waste to ore) depending on the ore body, with over 700,000 tons of waste being stripped per annum at current production levels. Overburden is normally trucked away using 25 ton trucks provided by contractors. Overburden stripping continues until the fluorite is exposed. ORE EXTRACTION (MINING) Mining is by open cast methods.The exposed ore is extracted by drilling and blasting. A total of approximately 360,000 tons of ore is mined annually. The geology has indicated that the ore body extends beneath the valley floor level and an open pit is being planned. Drilling and blasting The Kenya Fluorspar utilizes two types of drilling equipment (rig) to drill holes. These include: 1. Down the ho le hammer (DTH). This is mainly used in solid hard formations. The hammer is just behind the bit. 2. Top hammer drill rig (TH). This is mainly used in loose formations. The hammer is on top of the drill string (pipes).Crawler mounted DTHTop hammer drill rig The drill pattern to be applied depends on the: 1. Size of the drill bit to be used. 2. Geological condition of the area. All the bits are 102mm The drill pattern is square, 3m by 3m (burden by spacing) when there is a free face and staggered in absence of a free face. The depth of the drill holes differs, with most holes 10m and others 7m and 4m. Subdrilling is normally 3m. Both the DTH and TH are crawler mounted with TH complete with compressor mounted on it. Kenya Fluorspar has 3 operating crawler mounted drilling machines (2 DTH and 1 TH).BLASTING This operation involves the following stages: 1. Preparation of ANFO 2. Hole charging 3. Initiation of explosives PREPARATION OF ANFO This involves mixing the ammonium nitrate with fuel (diesel) in the ratio 0. 075ml of diesel for every 1kg of ammonium nitrate. This operation is done by an explosive mixer in Kenya Fluorspar. HOLE CHARGING This process involves placing booster/ primer at the bottom of the drilled hole. The boosters normally used include: cast booster, pentolite booster and gelignite. The Kenya fluorspar utilizes the pentolite booster for the priming purposes.Before placing the primer it is connected to a detonator. These detonators include: 1. Plain detonators 2. Instantaneous electric detonators. After placing the primer, ANFO is added depending on the hole depth as shown in the table below: Hole depth| Height of ANFO| Stemming| 10m| 7m| 3m| 7m| 5. 5m| 1. 5m| 4m| 3. 5m| 0. 5m| These holes charged are then connected by 25MS (millisecond) nonel shock tubes, short period detonating delay (SPDD) type. The rows are connected by 17MS surface trunk lines (also nonel shock tubes). The nonel shock tube has the following advantages: 1.Produces low noise and vibration 2. It has less fly rock. It is because of the above advantages that make it useful near factory where less vibration are required. The nonel shock tube is very expensive. INITIATION OF EXPLOSION Once charging is complete the explosion can be initiated depending on the detonator used. Initiation can be done using the following: 1. Safety fuse which burns at a rate of 2 minutes per metre. This is used incase of plain detonators 2. Blasting machine incase of electric detonators. Secondary blasting is also done incase large boulders are produced in the primary blasting.Large boulders can also be broken using the rock breakers. LOADING AND HAULAGE The blasted ore is loaded into trucks by an hydraulic excavator (Komatsu) hoe. The loaded ore is hauled a short distance of between 2 km and 7 km by contracted trucks to the crushing plant. These trucks range from 10tons to 20tons. The ore stock pilled separately depending on the source. PROCESSING OF FLOURITE (CaF2) The processi ng of fluorite at the processing plant involves the following stages: 1. Blending 2. Crushing 3. Grinding 4. Conditioning 5. Floatation 6. Thickening 7. filtration 8. Stock pillingBLENDING Blending in normally done at the primary crusher by a wheel loader before feeding into the crusher in ratio of: 2cheberen:1choff:1kamnaum This blending ratio ensures that the feed is 40% CaF2 CRUSHING Types of crushers 1. Primary crusher: Jaw crusher 2. Secondary crusher: cone crusher 3. Tertiary crusher: cone crusher PRIMARY CRUSHING The ore feed to the hopper through a 12in grizzly screen. It is then feed to the primary crusher through an apron feeder and belt conveyor. The ore is first crushed in a primary stage crushing plant from a feed of 350 mm to less than 30mm in size.The ore that is less than 60mm but more than 30mm is passed through the cone crusher where it is further reduced to less than 30mm. Any material that is more than 30mm is passed through the tertiary crusher. GRINDINGTypes mi lls used in Kenya Fluorspar 1. Rod mill 2. Ball mill 3. Re-grind mill. It is then conveyed to the grinding circuit where the material is added to a rod mill along with water to form slurry. The rod mill instantly grinds the ore after which it is sized using a hydrocyclone. Any oversized material is passed to the ball mill for a further grinding to the desired size of 80%.The ore is now ready for conditioning and flotation. CONDITIONINGThis process takes place in the conditioner. This where the depressants and collectors are added. 1. Depressants a) Sodium fluorite which depresses the P2O5 b) Sodium bifluorite which also depresses the P2O5 2. Collectors a) Betacol b) TapiocaThis process renders the fluorite hydrophobic by the addition of a surfactant or collector chemical. FLOATATIONFlotation is the process that concentrates the ore. This is done by agitating the ore slurry in cells with air bubbles.By adding a combination of fatty acid reagents, the fluorspar in the ore attaches its elf to the air bubble to float to the top of the cell. This product is skimmed off leaving the waste in the bottom of the cell. The process is conducted in a series of rougher, scavenger, and cleaner cells that successively concentrates the ore from 40% CaF2 in the feed material to a minimum of 97. 0% CaF2 in the final concentrate. The water in the final product is then removed in a thickener and a rotary drum filter. This produces a filter cake concentrate containing approximately 11. % moisture. The samples are analyzed in the company's assay and research laboratory. The waste product is pumped to the tailings dam and settled water is recycled to the plant for reuse. A FLOATATION CELLPERCENTAGE CaF2 CONCENTRATED PER SERIES OF FLOATATION CELL FLOATATION CELL| PERCENTAGE CaF2 CONCENTRATED| ROUGHER CELLS| 80%| SCAVANGER CELLS | 85%-87%| CLEANER CELLS| 97%| FLOATATION CIRCUITDEWATERINGThe water in the final product is then removed in a thickener and a rotary drum filter. This produces a filter cake concentrate containing approximately 11. % moistureTHICKENER ROTARY DRUM FILTEROperational Sequence * Cake Formation With the overflow weir set to a maximum the â€Å"apparent submergence† is normally 33-35% so the slurry levels between 0400 and 0800 hrs. Once a sector enters submergence vacuum is applied and a cake starts to form up to a point where the sector emerges from the slurry. The portion of the cycle available for formation is the â€Å"effective submergence† and its duration depends on the number of sectors, the slurry level in the tank and the bridge setting which controls the form to dry ratio. Cake Washing and Drying After emerging from submergence the drying portion of the cycle commences and for non-wash applications continues to about 0130 hrs where the vacuum is cut-off. If cake washing is required the wash manifolds will be located from about 1030 to 1130 hrs and the remaining time to vacuum cut-off at 0130 is the portion allocated to final cake drying. * Cake Discharge After vacuum for the entire sector is cut-off air blow commences at about 0200 hrs in order to facilitate cake discharge.The blow, depending on the position of the tip of the scraper blade, will cut-off at approximately 0300 hrs. Drum filters are normally operated with a low pressure blow but on certain applications a snap blow is applied and to avoid the snapping out of the caulking bars or ropes wire winding of the cloth is recommended . Blow is used on scraper and roll discharge mechanisms but on belt discharge filters vacuum cuts-off when the filter media leaves the drum. The final product has composition shown in the table below: PRODUCT| PERCENTAGE COMPOSITION| Fluorite, CaF2| More than 97%|Silica, SiO2| Less than 1%| Carbonate, CaCO3| Less than 1%| Iron III oxide, Fe2O3| Neglible| Phosphorus penta oxide, P2O5| Less than 0. 5%| TAILINGS DAMTailings, also called slimes, tails, leach residue, or slickens, are the materials left over after the process of separating the valuable fluorite from the uneconomic fraction (gangue) of the ore. These are the wastes from the floatation cells. Tailings are distinct from overburden or waste rock, which are the materials overlying an ore or mineral body that are displaced during mining without being processed.The tailing are pumped from the processing plant to the to tailings dam for disposal. The height is about 15m and dimensions are 150m by 30m. it is trapezoidal in shape. The dam also has drain pipes to remove the seepage water. Hydraulic cyclones are used to build the dam. The cyclones separate the tailings into fine and coarse material. The coarse materiel from the cyclone underflow is used to build the wall of the dam will the material and water is disposed into the dam. The water is recycled and pumped back for reuse into the factory. The will built until the dam touches the adjacent hill.LABORATORY QUALITY CONTROLL SECTIONThe company conducts two types of tests – chemi cal and metallurgical. The chemical section performs wet chemistry analysis (mainly titration) and operates 24 hrs a day throughout the year and each shift is headed by a qualified chemist. The metallurgical section mainly concentrates on research and development work. The sample (pellet) is subjected to an XRF machine which scans the sample imparting energy to it. The sample then radiates heat of various wavelengths. The wavelengths are analyzed by a computer program which displays the information instantly on the screen.Strict quality control of run-of-mine ore, exploration and final product analysis is maintained by sampling. KFC prides itself in the quality of its assays, which are always crosschecked with those of European laboratories, namely SGS (Netherlands), HOFF and BSI in the United States. Weight sampling and analysis:   All analyses are being performed by SGS Kenya Ltd (Swiss company) at the cost of the company. Apparatus in the laboratory: a) Two Jaw crushers (14in. and12in. ) b) Pulverizer c) Oven for drying d) Splitter e) XRF machine f) Analytical balance g)A pilot plantSample preparation i. Drying ii. Splitting iii. Crushing iv. Pulverizing. CARGO CONDITIONThe fluorite is Chemically inert, non-reactive, non-flammable, non-hazardous mineral sand. No hazard labelling required in accordance with IMO regulations. No special precautions for storage however, in order to maintain the purity of the material, it must not be allowed to be contaminated by any other material as it is used as the base product in sensitive chemical processes to produce other products and substances.TRANSPORT Once the acid spar is produced, the fluorspar is loaded into 10 ton trucks and hauled to the railway siding at Kaptagat, a distance of 37km. From here it is loaded into 36 ton rail wagons for the 860 km journey to the Mbaraki wharf at Mombasa. The wagons are offloaded at the wharf where the fluorspar is stockpiled and covered while awaiting shipment. The storage capac ity at Mbaraki is approximately 25,000 tons. The process of off-loading of wagons and trucks is labour intensive by means of manual labour.Loading of the vessels is conducted using an automatic Demag Ship Loader, owned and operated by Bamburi Portland Cement Company. An average rate of 2,500 tons per day can be loaded on a continuous basis even on public holidays. The quantity loaded and moisture analyses are conducted by an independent surveyor on a continuous basis to ensure a representative result of the product loaded. Since Mombasa is one of the main ports in East Africa, chartering of vessels to carry bulk cargoes to any destination in the world can be easily arranged. |