Turkey’s Retailing Sector Analysis

RETAILING INDUSTRY in terms of Food- Non Food * Sectorial Overview; Retailing is the business activity that involves selling products/services to customers for their non-commercial, individual or family use. Normally, retailing is the final stage of the distribution process. The middle and long term potential of Turkey retail industry continue remaining attractive. Companies in sector support the sectorial expansion with their expansion strategies, negative business administration fund and powerful cash creating capabilities.The defensive structure of sector and low penetration strengthen this situation. With the increase in consumer demand, rapid urbanization, increase in large scale retail investments the number of shopping malls in Turkey increased by more than 20% in the last two years. In the same period, the total surface rent area in Turkey increased by more than 30% and reached As it can be seen on the graph below; the total size of the retail sector (organized and unorganize d) in Turkey is expected to reach $355 billion in 2013 and grow with 10% until 2016. (See Figure 1 in Appendix)Organized retail, a highly promising segment due to increasing per capita consumer spending and relatively weaker presence up to now in comparison with developed markets, is estimated to be 40% of the total retail industry in Turkey. (See Figure 2 and Figure 3 in Appendix) * The share of organized retail continue increasing; The share of organized retail which has the level of %25 in the total retail market in 2000 exceeds the levels of %50 according to the 2013 predictions. Turkey organized retail market achieve an impressive growth in last 10 years.It is anticipated that the share of organized retailers increase from the level %47 to the level %60 in upcoming 5 years. It is anticipated that the share of organized retail increases to the level of %60 till 2015. While the food retail segment constitute more than half of total retail market, traditional structure such as loc al markets and groceries still dominates the market. It is expected that approximate number of 10. 000 organized retail store will be twofold in 5-6 years. Besides, it is predicted that the number of groceries will be regress from 150. 00 to 100. 000 at the same period. Turkey, with its 105 milliard dollars sales figure, is located in 6th line in Europe retail sector. Nevertheless, while the total share of 5 biggest players in Europe is approximately %50, it is %20 in Turkey. Organized Retail Sector is the fastest expanding canal discount merchandising. It is expected that the number of approximately 6. 000 discount stores in Turkey will be twofold in upcoming 4 or 5 years. With the support of increase in the income per capita, %12 growth is anticipated in retail sector between 2009 and 2015.The discount store chain in Turkey (such as A101, SOK, BIM, DIASA) have a very fast growth schedules. BIM is placed in the first row in discount merchandising with its large store quantity. The company is planning to open 300 or 350 new stores every year. The fast increase in store quantities supports scale economy and companies are able to pull down their sale prices thanks to the decline in costs. With the effect of increasing competition in sector, it is expected that the growth accelerate with purchasing in forthcoming years. Despite the high competition, the retail sector is enlarging expeditiously; 6 major organized food retailing brand constitute %37 of total market in spite of divided structure. It is expected that it will be inorganic growth, merchandising and reunions, thus the companies will achieve more competitive charges by increasing their purchasing power in 2013 and later on with the intensity of competition. 2 Major Retailing Companies in the Sector; MIGROS vs BIM BIM and MIGROS which are the prominent players of Turkey food retail sector, are analyzed in this assignment in terms of their financial analysis.In retailing sector, these 2 companies have a gr eat effect and they are known as most powerful competitors with their shares all over the industry. Migros has 6% and BIM has 9% industry shares. (See Figure 4 in the Appendix) 1) BIM BIM (Birlesik Magazalar A. S. ) adopts as a principle the supply of the highest quality basic foodstuff to consumers, at the best possible prices. BIM began its operations in 1995 with 21 stores and in line with this principle. BIM’s product portfolio comprises around 600 products. 44. 12% of BIM shares started to be traded in Istanbul Stock Exchange in 15 July 2005.BIM is the first representative of high level discount model in Turkey and the company got in stock market return for its rapid growth. While BIM finishes its 7th year in stock market, it became the 12th company that has highest market value of Turkey. * Board of Directors Mustafa Latif TopbasChairman of the Executive Committee Ekrem PakdemirliVice Chairman of the Board Mahmud MeraliBoard member and has chaired the Audit Committee Jo s SimonsBoard member and consultant. Omer Hulusi TopbasBoard member. Yalc? n OnerBoard member. Dr. Zeki Ziya SozenBoard member. Turnover doubled to six; The rapid growth of the company had an effect on the rise of BIM , whose capital’s 17,43 per cent belongs to Mustafa Latif Topbas, in stock market. (See Table 1; Structure of BIM’s Shareholders) BIM ‘s sales revenues were 1. 4 billion TL . In the end of 2011, this revenues reached to 8. 2 billion TL. Also, the personnel number of the company increased approximately 3 times in 7 years. In the end of 2010, BIM became the endorsement leader with 6. 5 billion TL in the retailing sector of Turkey and it maintained this position in 2011.As abroad, while the company increases the number of stores in Morocco, aims Egypt for the next year. This year, BIM also started to operate in mobile communication industry with the name of BIMCELL. * Growth Strategy; Aggressive Growth among the competitor companies that strength After 11% increase in number of stores in 2011, with the number of 3. 584 stores in 2012, BIM is the retailer that has the largest store network in Turkey. (See Figure 5; Number of Stores ) BIM plans to open 400 new stores in 2013 and reach 5. 500 stores in 2015.With the store numbers increases there also has been 14% increase in number of employees in the company in 2011. BIM has been expanding their business, operations in every part. (See Figure 6; Number of Employees) These increases in operation side lead to an increase in number of average daily customers with 14% in 2011. (See Figure 7; Average number of Daily Customers) Of course with these changes, company carried out a 25 percent net sales increase over the industry average in 2011 and 2012. (See Figure 8; Sales and Gross Profit Margin) It is estimated that a sales increase over 20 per cent in 2013.Depending on this net sales growth, Company’s net profit has been increased by 22% over the last three years. Due to the inc rease in net sales; margin values regarding net profit, gross profit, EBIT, EBITDA have been decreased over 3 years. (See Figure 9; Net Profit and Net Profit Margin) With the effect of net sales increase, EBIT has been increased to 347,5 in 2011 ( See Figure 10; EBIT and EBIT margin) These was a 19%increase in company’s EBITDA and this means that there is an increase in amortization so we can say that company increased their asset purchases as we can see on the related figure. See Figure 11; EBITDA and EBITDA margin) * 18 times has been increased in 7 years; BIM began to be traded with 672. 9 million TL of market value in July, 2005. The value of the company increased approximately 18 times in 7 years based on TL. The increase in BIM stocks since the first trading day was 1. 861 per cent. As a result of its rapid growth, BIM’s market value is the over of the Erdemir, Arcelik, Ford Otosan, Finansbank and Vak? fbank in addition to Tupras that is the Turkey's largest indu strial enterprise and refinery giant.Also, BIM has paid its shareholders a total dividend of 700 million TL in the period of 7 years in the stock market. (See Figure 12; BIM Dividend Payment over the last 5 years). As the company’s profit increased dividend payments are increased also. There has been a positive relationship between them. This is a very good indicator for the company’s investors who already invested in BIM’s shares and who are planning to invest. Also as a result of the increase in BIM’s stock prices and stock revenues; value of the company also increased. So, this situation put the company's principal shareholder, Mustafa Latif Topbas, to the Forbes list. On the other hand, for each stock BIM has really high returns and it brings some important risks also for the investors. (See Figure 13; IMKB 100 vs. BIM Stocks) When we compare the situation of BIM’s stocks in Imkb 100 with stocks of MIGROS, BIM has a higher return, profit for th e investors and because the returns and prices of BIM higher than IMKB 100 and because there is a really important difference between the line according to Figure, BIM’s stocks are also operated and valued in IMKB 30. Why is it rising? * The rapid growth in the number of stores and endorsement. * The high capacity of dividend payment.. * Increasing profitability of the company every year. * To expand abroad with Morocco. * To bring new revenues with BIMCELL. *3/4 of the shares in stock market is belonged to foreigners. * Growth Targets in Egypt after Morocco: BIM will open stores in Egypt by 2013. The company estimates that the growth in Egypt will be faster compared to the growth in Morocco. Recently, BIM operates in Morocco with 103 stores.And the company plans to open 50 new stores in Egypt every year after 2013. 2)MIGROS Originally established in Turkey in 1954 as a collaboration of the Swiss-based Migros Cooperatives Society and the Istanbul municipality, Migros’s primary mission was to supply economically priced groceries and household supplies to consumers in Istanbul under wholesome conditions. In 1975 the Koc Group acquired a majority stake in the company, following which there was a steady increase in both number of its stores and its brand value for more than a decade.In 1991, Migros became the first publicly traded company in retail. Following a Koc Group strategic decision to pull out of grocery retailing, in February 2008 Koc Holding signed an agreement to sell its 50. 83% stake in Migros to Moonlight Perakendecilik. Transfer of the shares took place on May 30th of the same year. On 30 April 2009, Moonlight Perakendecilik (now known as Migros Ticaret A. S. ) and Migros Turk T. A. S. were merged into a single company which has since been operating under the name â€Å"Migros Ticaret † and whose principal shareholder is MH Perakendecilik ve Ticaret A. S.In 2005 Migros further bolstered its leadership of Turkey’s food ret ailing sector with its acquisition of Tansas, another national chain As of end-2011 Migros was operating through a total of 745 national and international locations. With a national presence in all seven of Turkey’s geographical regions taking the form of 262 â€Å"M†, 190 â€Å"MM†, 59 â€Å"MMM†, and 16 â€Å"5M† Migros-branded stores and of 177 â€Å"Tansas† and 13 â€Å"Macrocenter† stores, its international footprint consisted of 23 Ramstores in Kazakhstan and another 5 in Macedonia. ( See Figure 14,15 ; Breakdown of Net Sales Area by Store Brands of MH Group) Distribution of Dividend According to latest data from the company’s official web-site, at the company’s Annual General Meeting held on May 20, 2010, it was decided to distribute a gross cash dividend of TL 195,833,000 to the shares representing TL 178,030,000 capital and the dividend disbursement is to start on May 28, 2010. On July 30th, 2009, it was decided to distribute the dividend of the free reserves after setting aside the reserves required by law to the share certificates representing the capital of TRY 178,030,000 and to use TRY 2,492,420,000 from this source for the distribution of gross cash dividends. See Table 2; Structure of Migros’s Shareholders) * Growth Strategy: The company increased its total store number to 745 in 2011. (See Table 3) and 2012, they increased the stores to 874 by opening 142 new stores. The company is planning to open 100 new stores in 2013. It is expected that the company will maintain rapid growth and increasing operation profitability in 2013 by focusing on its main operations. In addition to this, in 2013, it is estimated that the company will have 13% sales growth in year basis and 6. 4% EBITDA margin. * The positive effect of selling of â€Å"SOK† on Profitability.After selling SOK Discount Stores, thanks to high margins of supermarket segment and improvements in operational manage ment and supply chain, Migros’s EBITDA margin increased in 2011. It increased from 5. 7% in 2011 to 6. 5% in 2011. While Migros leave the channel of low margin discount retailing that is in intense competition, it will increase its penetration in supermarket segment that it is the leader in. In the medium term, 6. 0%- 6. 5% is the sustainable margin level. It is expected that sale, partnership and the reunion debates of Migros and CarrefourSa in 2013 will close the sale after getting purchased the food by Makro. BC Partners’ expectation of selling the share of Migros, BC Partners (MH Retailing) which is %80,5 shareholder of Migros is a private equity company centered in London. In spite of the fact that it is expected that BC Partners will sell their quantum of Migros in between 2013-2014, there is no explanation about the time period. It is thought that, despite the aggressive growth strategies of Migros continue, the quantum sale in 2013 is highly possible. In the ca se of selling deal, it is possible to be made a call for minor shareholders. * Company’s Stock Returns in IMKB 100When we compare the Migros Stock Returns we can say that, the prices of each stocks are less than BIM’s stocks and their returns are above the IMKB 100 line. This situation makes company’s stocks profitable but at the same time it may mean a high risk for the investors ( See Figure 17; IMKB 100 vs. MIGROS Stocks) Analysis of Financial Ratios of BIM & MIGROS (See Tables 4,5,6) 1) Liquidity Ratios Current Ratio: This ratio is commonly used as an index for current financial position and used for measuring company’s ability to pay short-term debts and determining the company’s net working capital if it is enough or not.Generally it is expected to be 2,00. The ratio of 1 is also acceptable. When we look at both companies both of them may have some difficulties to pay their short-term liabilities. For the firms which has a high level of inven tory turnover ratio and receivable turnover ratio like Bim, they are able to pay their short-term debts easily. Quick Ratio: It is a more sensitive ratios than current ratio. It shows us the ability of firms to pay their short-term liabilities when they have no sales growth, when their sales stops. It is expected to be 1. The ratios of both firms are less than deal number so receivable accounts and cash cover short term liabilities and their abilities to pay are not good but at least both firms’ ratios are higher than industry ratio and this brings these 2 companies in a better position in terms of short-term debts. Cash Ratio: It is most sensitive liquidity ratio. Generally, this ratio is not expected to be under 0. 20. As both firms cash ratios are higher than industry ratio, it won’t difficulties for paying their debts in the condition of lack of sales and getting their receivables. Additionally, company is holding more cash than needed.Net Working Capital: If the v alue of networking capital is minus, this means company’s current liabilities are more than current assets. This is the main reason for the company which finance its current assets with current liabilities. This is the case for BIM. We can say that company might have done current assest investments. We can say that BIM has some problems in terms of liquidity. Migros has positive networking capital and it has no liquidity problem. 2) Leverage Ratios Total Debt Ratio: This ratio is expected to be under 50%. With 0. 64, 0. 63 and 0. 64 ratios according to three years, BIM has higher values than this ideal ratio.When we look at industry ratio, it is 2,00. This ratio tells us, foreign resources are used for financing assets by the rate of 0. 64. It shows that BIM can pay its debts by selling assets when the operation stopped. This is the same for Migros expect the year 2010. It has a very high ratio, even higher than the industry level which is 2,41. Debt to Equity Ratio: This rat io can be equal to 1 or higher than 1. If it is higher than 1, it means difficulties in paying debts and interests or if it is lower than 1, it means company finance their assets by using its equities. The industry ratio is 1. 3. By looking Migros’s DTE ratios, they mostly finance their assets by using their equities instead of using foreign resources and they will have no difficulties while paying their debts, liabilities in the future. But when we compare it with the industry which is almost 1, Migros will have less advantage in any crisis condition. In this case, Bim has a more advantageous position than Migros because its ratios are closer to industry ratio and ideal ratio. Long Term Debt: It is a normal ratio 0. 12 – 0. 16 in Turkey. The industry ratio is 1. 03. Migros’s ratios are 0. 47, 0. 44, 0. 49 orderly.Bim’s ratios are 0. 01, 0. 01, 0. 01 orderly. If this ratio is high, this increases interest burden, decreases dividends and as a result, it ca uses not to cover debt burden. Migros prefers long-term foreign resources rather than using their equities. Long Term Debt to Equity: Ideal ratio is 1. Migros’s ratios are 0. 64, 1. 85, 2. 26. Bim’s ratios are 0. 04, 0. 03, 0. 03 orderly. The industry ratio is 0. 84. For Bim with these ratios that are less than 1, it means that Bim’s equity is more than long term debts. It is valid for these three years. Times Interest Earned: This ratio should be more than 8.Higher value of times interest earned ratio is favorable meaning greater ability of a business to repay its interest and debt. Lower values are unfavorable. That means if a company cannot repay its interest and debt it may become in a difficult situation even it may go bankrupt. In general, times interest earned of 1. 5 or below is unsafe. 3) Efficiency Ratios Receivable Turnover: If a company has a low receivable turnover it means, that company has some important difficulties to collect their receivables a nd the collection policy of that company is not so good and this means that they are unnecessarily relax about sales on credit.When we compare Bim and Migros, Bim is a better position for collecting its receivables in a quicker way. Its ratios are even less than industry ratio. When we compare Bim with Migros, Bim really has a strong ability to get their sales and receivables and their portfolios include low-risk and trustful customers Average Collection Period: It can also be evaluated by comparison with the terms on which the firm sells its goods. For Bim, with the high value of this ratio, it may not have the ability to finance its own debts because of long-term collection.Migros has a shorter average collection period Inventory Turnover: It is the most important ratio in retailing sector and it measures company's efficiency in turning its inventory into sales. Its purpose is to measure the liquidity of the inventory. Migros has ratios 7. 43, 8. 52, 8. 47 orderly and Bim has rati os 16. 98, 19. 56, 20. 23. Industry average is 10. 61. Migros’s ratios are less than Bim’s and industry’s ratios so this is a signal signal of inefficiency, since inventory usually has a rate of return of zero. It also implies either poor sales or excess inventory.For Migros low turnover rate can indicate poor liquidity, possible overstocking, and obsolescence, but it may also reflect a planned inventory build up in the case of material shortages or in anticipation of rapidly rising prices. Bim has highest inventory turnover ratios over Migros and industry. It means that Bim is really strong in terms of sales and at the same time very effective to control its inventories. Its higher inventory turnover ratio also means better liquidity. Also its efficiency in managing their stocks were increased, their stocks are becoming sales revenues in a short time and their stock costs were decreased year by year.With this positive development, it has less financial resource s for their stocks as necessities and their competition force has increased by this activity. Average Days in Inventory: Generally, the lower (shorter) the DSI the better. Bim has lower Average Days in Inventory than Migros and industry. This means, Bim is doing good in the sector and it has a good position in industry competition. This is an indicator of good operating cycle of Bim. In this case, Migros is in a worse situation. Asset Turnover: Bim has higher asset turnover ratio than Migros and industry and it shows us Bim has much more effective sales than Migros.It is more successful than Migros in order to generate sales with fewer assets it has a higher turnover ratio which tells it is a good company because it is using its assets efficiently. Migros is not using its assets optimally. Total asset turnover ratio is a key driver of return on equity 4) Profitability Ratios A company’s stock price, in large part, is driven by the company’s ability to generate earnings . Therefore, it is useful for investors to analyze the profitability of a company before investing in it. One way to do this is by calculating and tracking various profit margins, which reflect how efficiently a company uses its resources.Gross Profit Margin: Due to higher sales volume of Bim, Bim has lower gross profit margin than both Migros and the industry and it means Profit Margin: It tells us about company’s profits and their different kinds of policies, strategies and decisions. When we look at Bim’s profit margins over the 3 years they are higher than Migros’s profit margin values and the industry average. It is the most advantageous one. Bim has a better position than Migros in the industry. It has a competitive advantage over Miigros. ROA: It shows us at what amount companies get returns from their investments.Bim has higher ROA than Migros and industry over 3 years. It has become really effective to use their assets in a profitable way. For Migros, i n 2011 the ratio became a minus value this means Migros lost its asset profitability and started to not to get any profit from their assets. ROE: Stockholders invest to get a return on their money, and this ratio tells how well they are doing in an accounting sense. It measures the performance of companies’ equities. Again for this ratio, Bim has a much better position. It has higher ratio than Migros and industry. But on the other hand, there has been a small ROE reduction for Bim over 3 years.For example in 2011, ROE is 0. 48 and this means that owners of Bim could get 10% income from their equity that they invest for Bim. Operating Profit Margin: With a higher ratio of Bim, it is more successful in generating from operating its business. It is more important than net profit margin because it measures the profit margin which companies gain from goods and services sales in companies’ main activity subjects. This ratio is higher than industry ratios which is really imp ortant especially for Bim’s investors. APPENDIX Figure 1 Figure 2 Figure 3 Figure 4 Table 1: Structure of BIM’s ShareholdersTable 2; Structure of Migros’s Shareholders Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Table 3; # of National and International Stores, Net Sales Area Figure 14 Figure 15 Figure 16 Figure 17 Table 4: Financial Ratios of Migros | 2009| 2010| 2011| 2010| | Migros| Migros| Migros| Industry| LEVERAGE RATIOS| Debt to equity| 2. 76| 3. 13| 3. 58| 1. 03| Total debt ratio| 0. 73| 2. 41| 0. 78| 2. 00| Long Term debt ratio| 0. 47| 0. 44| 0. 49| 0. 22| Long-term debt to equity ratio| 0. 64| 1. 85| 2. 26| 0. 84| Times Interest Earned| 1. 54| 1. 28| 1. 43| 22. 35|LIQUIDITY RATIOS| Current ratio| 1. 34| 1. 01| 1. 13| 0. 82| Quick ratio| 0. 94| 0. 58| 0. 70| 0. 45| Cash Ratios| 0. 88| 0. 55| 0. 66| 0. 32| Net Working Capital| 497,628| 27,363| 218,876| -31,682,086| EFFICIENCY RATIOS| Total asset turnover| 1. 01| 1. 14| 1. 04| 2. 08| Inventory turnover | 7. 34| 8. 52| 8. 47| 10. 61| Receivable turnover| 150. 11| 127. 5| 85. 64| 66. 25| Average collection period| 2. 43| 2. 86| 4. 26| 8. 80| Average days in Inventory| 49. 72| 42. 84| 43. 09| 38. 61| PROFITABILITY RATIOS| Gross profit margin| 0. 25| 0. 24| 0. 25| 0. 22| Net profit margin| 0. 01| 0. 006| -0. 02| 0. 02| Operating Profit Margin| 0. 01| 0. 03| 0. 04| 0. 01| Return on Asset| 0. 01| 0. 00| -0. 02| 0. 03| Return on Equity| 0. 07| 0. 03| -0. 13| 0. 11| Table 5:Financial Ratios of Bim | 2009| 2010| 2011| 2010| | Bim| Bim| Bim| Industry| LEVERAGE RATIOS| Debt to equity| 1. 83| 1. 74| 1. 81| 1. 03| Total debt ratio| 0. 64| 0. 63| 0. 64| 2. 00| Long-term debt ratio| 0. 01| 0. 01| 0. 01| 0. 22| Long-term debt to equity ratio| 0. 04| 0. 03| 0. 03| 0. 84| Times Interest Earned| 156. 8| 83. 67| 140. 6| 22. 35| LIQUIDITY RATIOS| Current ratio| 0. 88| 0. 95| 0. 98| 0. 82| Quick ratio| 0. 51| 0. 56| 0. 61| 0. 5| Cash Ratios| 0. 24| 0. 33| 0. 36| 0. 32| Net Working Capital| -80,986| -38,285| -18,386| -31,682,086| EFFICIENCY RATIOS| Total asset turnover| 4. 84| 4. 79| 4. 72| 2. 08| Inventory turnover | 16. 98| 19. 56| 20. 23| 10. 61| Receivable turnover| 32. 99| 34. 15| 30. 21| 66. 25| Average collection period| 11. 06| 10. 68| 12. 08| 8. 80| Average days in Inventory| 21. 4| 18. 66| 18. 04| 38. 61| PROFITABILITY RATIOS| Gross profit margin| 0. 17| 0. 16| 0. 16| 0. 22| Net profit margin| 0. 04| 0. 037| 0. 037| 0. 002| Operating Margin| 0. 04| 0. 04| 0. 04| 0. 01| Return on Asset| 0. 19| 0. 17| 0. 17| 0. 3| Return on Equity| 0. 54| 0. 49| 0. 48| 0. 11| Table 6: Financial ratios of Tesco Kipa, Carrefoursa, Migros, Bim, Industry, in 2010 2010| | Bim| Migros| Carrefoursa| Tesco Kipa| Industry| LEVERAGE RATIOS| Total Debt ratio| 0. 63| 2. 41| 0. 41| 0. 70| 1. 03| Debt to equity| 1. 74| 3. 13| 0. 71| 2. 43| 2. 00| Long-term debt ratio| 0. 01| 0. 44| 0. 02| 0. 42| 0. 22| Long-term debt equity ratio| 0. 03| 1. 85| 0. 04| 1. 45| 0. 84| Times interest earned| 84. 6| 1. 28| 1. 54| 2. 00| 22. 35| LIQUIDITY RATIOS| Net working capital| -38,285| 27,363| -126,853,307| 178,586| -31,682,086| Current ratio| 0. 8| 1. 01| 0. 81| 0. 59| 0. 82| Quick ratio| 0. 51| 0. 58| 0. 53| 0. 20| 0. 45| Cash Ratios| 0. 24| 0. 55| 0. 36| 0. 16| 0. 32| EFFICIENCY RATIOS| Total asset turnover| 4. 84| 1. 14| 1. 42| 0. 95| 2. 08| Inventory turnover | 16. 98| 8. 52| 10. 3| 6. 65| 10. 61| Receivable turnover| 32. 99| 127. 5| 21. 5| 83. 04| 66. 25| Average collection period| 11. 06| 2. 86| 16. 9| 4. 39| 8. 80| Average Days in Inventory| 21. 4| 42. 84| 35. 4| 54. 8| 38. 61| PROFITABILITY RATIOS| Gross profit margin| 0. 17| 0. 24| 0. 22| 0. 27| 0. 22| Net profit margin| 0. 04| 0. 006| -. 008| -0. 03| 0. 002| Operating Margin| 0. 4| 0. 03| -0. 005| -0. 002| 0. 01| Return on Asset| 0. 19| 0. 00| -0. 011| -0. 03| 0. 03| Return on Equity| 0. 54| 0. 03| -0. 02| -0. 11| 0. 11| | | REFERENCES * http://www. bim. com. tr/yatirimci-iliskileri. html * http:// www. migroskurumsal. com/Foreks. aspx? IcerikID=35 * http://tesco. kipa. com. tr/default. asp * http://www. carrefour. com. tr/Kurumsal/finansalsonuclar;jsessionid=b3a0da5ff5e79ee039b023b24ca0 * http://www. ampd. org/ * http://www. capital. com. tr/perakende-AltKategoriler/48. aspx * http://www. aaii. com/computerized-investing/article/profit-margin-analysis. pdf

Medea Greek Mythology Essay

When Medea decides to take matters in to her own hands, about punishing the people who have done wrong to her, she is accused of wanting not justice—vengeance. Because I am not a native of neither Corinth nor Colchis, I have my own view about her motives. However, I would agree with the Corinthian Women, Medea is seeking vengeance; not justice. Some people might argue that Medea is seeking justice. When in actuality, Medea wants vengeance. The opposition would say justice took place because the Gods allowed Medea the time to perform her various acts. Although these things happened Medea turned to vengeance when she took it upon herself to kill Creon and his daughter Creusa. Even the chorus, the â€Å"ideal spectators†, implies that Creon is a poor king when, after he banishes Medea, the First Corinthian Woman sympathizes, â€Å"I am of Corinth and I say that Corinth is not well ruled. †(1. 214-216). This quote gives us proof that Medea has some sort of reason to seek revenge on Creon. However she lets her hatred exceed its boundaries and allows herself to take the lives of the King of Corinth and its Princess all because they chose Jason over her. In addition, her actions all prove that she wants Jason to do more than pay for hurting her. She wants him to suffer at the fate of her own children. Her revenge was selfish. Medea involved the two things she knew would hurt Jason the most—her own children. According to the First Corinthian Woman, â€Å"It would be better for you, Medea if the earth opened her jaws and took you down into darkness. But one thing you will not do, for you cannot, you will not hurt your own children, though wrath like plague-boils aches, your mind in a fire-haze bites the purple apples of pain. No blood-lapping beast of the field, she-bear nor lioness, nor the lean wolf-bitch, hurts her own tender whelps; nor the yellow-eyed, seythe-beaked, and storm shouldered eagle that tears the lambs has ever made prey of the fruit of her own tree. †(2. 115-126). Keep in mind that the Corinthian Women are the conscious of Corinth. Through this quote the First Corinthian Women has stated that Medea could not harm her own children. She even gives examples of the most dangerous predators that don’t even harm their own young. This is evidence that Medea went beyond the state of justice; but she went well into the state of vengeance. Medea knew what she was doing and quite frankly she could care less about anything other than what she thought of what was seeking revenge on Jason. In conclusion, vengeance was sought by Medea. She went above the fact of teaching Jason a lesson; she even stated she hated Jason more than she loved her children. Answer this question is what Medea has done entertaining or morally instructive?

The Financial Crisis of 2008 Essay Example | Topics and Well Written Essays - 750 words

The Financial Crisis of 2008 - Essay Example [Wisman &Barker, 2008]. An interesting and relatively new idea is put forth by James Livingston in his book "Their Great Depression and Ours," Challenge. He argues that the cause of the Great Depression in the 1930s was poor wage performance leading to large profits in search of few investment opportunities. In another article, Saving Private Savings, or, The God That Failed he discusses at length the plausible reasons reasons for the current economic crisis. While not blaming anyone in particular for the present economic crisis, he opines that economic growth is possible only through higher consumer demand and spending. This in turn requires higher savings. In his words, "economic growth has proceeded as a function of declining net investment for the last 90 years."As the sequence of events that should have been tax cuts, savings, investments by the government and higher job growth, higher wages and higher spending got mixed up, higher private savings from households and business firms were parked in the stock market, the speculative bubble had to burst, both in 1920s and now. 2) What are some of the similarities and differences between the current crisis and the one that launched the Great Depression The Great Depression of the 1930s was brought on by the crash of the Wall Street in September and October 1929.Stock prices tumbled by almost 50% in a matter of two months. The market had probably been overbought and had reached a peak before it came crashing down. The unpredictable stock markets that had been steadily rising for some time shed the excess fat and trimmed down considerably. Investors who had made good gains in stock markets the preceding years had borrowed from banks to invest more on the stock markets. When the markets crashed, there was panic all round. Banks were unable to recover debts, news of banks closing down spread and people wanted to withdraw all their savings. Banks were weary and wanted to sit on cash and stopped lending. This led to closure of the manufacturing units dependent on credit which in turn led to large scale unemployment. Finally the government took drastic steps to check the recession and the economy stopped declining. The similarities between the causes leading to the Great Depression and the economic situation seem to be the greed of human beings. Excess of anything is bad, especially greed. Rothschild is of the opinion that "herding" or the tendency to follow the crowd and "leveraging" or borrowing to make financial investments, were also common factors. In both the situations, greed fuelled people into higher borrowings and ultimately, they lost out on the capital too. In the 1930s, it was the greed of the common man that led to the Recession, while in 2008, it was the greed of the investment bankers and other financial wizards that led to the recession. Another similarity has been

Executives Transition Management and Succession Planning of Non-profit Coursework

Executives Transition Management and Succession Planning of Non-profit Organizations - Coursework Example Starting from planning for the departure of an executive to the entry of a new leader, ETM encompasses three phases that include Prepare, Pivot as well as Thrive. On the other hand, Succession Planning entails the practice of preparing an organization for a leadership change regardless of whether it is planned or unplanned. One of the major aspects that makes Succession Planning an effective strategy is that it entails developing a board succession policy that is essential in providing tactics for enhancing leadership. In addition, as companies emulate the culture of succession planning, they create an important base through which the firm initiates talent development and leadership development. As stipulated by Tom Adams, nonprofits organizations highly value improving leadership through talent management are leadership management. Executives Transition Management in the article by Tom Adams is depicted in one of the food banks in the Midwest. Having been under the leadership of a female CEO whose performance was remarkable; the food bank experienced an expansive growth. When the CEO decided to retire, the board was very worried since they saw high chances of failure. However, through the guidance of the board chairman, the organization sought the help of a local banker who was exposed to ETM (Adams, 2009). This also entailed hiring of an ETM consultant and the formation of a Transition Committee to oversee the implementation of ETM policy. In this regard, the board of directors hired a new executive who was aimed at enhancing the activities of the food bank in its endeavor to fight hunger. As a result of the adoption of the ETM, the organization experienced various benefits. First, it helped in the exit of the founder and the hiring of new executives. In this way, the continuity of the organization activities was achieved.     

If you could be anyone in history, who would it be and why Essay

If you could be anyone in history, who would it be and why - Essay Example Florence Nightingale was one such woman who performed extraordinary services for mankind in an era when sexism was a major sociological issue but she did not get bound by societal norms and she moved ahead to serve the human race. If I could be anyone in the history of this world, I would opt to be Florence Nightingale. This is because her services can never be forgotten and her name is linked with the profession of nursing and it is the first name to come in the mind of a person when he thinks about the hospital industry.  Florence Nightingale was in the true meaning a woman of spirit. She was a bold lady who could have lived in luxuries for her entire life owing to the fact that she belonged to a rich family. But she chose to perform a greater role of helping the beings in suffering. She carried out an exemplary role by assisting wounded soldiers during the war which was a very difficult task at that time owing to the lack of resources. She came over all the obstacles that came i n her way and proved the fact that determination can make a person achieve anything. She was the first nurse and she laid the block for the creation of the profession of nursing which is one of the most important fields required for the health industry in today’s world. Therefore, seeing her strong character and her determination in her field of choice I would have really wanted to be in her place. I would have wanted to be remembered in the same way as she is in the world today owing to the exemplary good acts that she performed.

South Africa and the end of Apartheid (CASE) Module3 Essay

South Africa and the end of Apartheid (CASE) Module3 - Essay Example In this case, the whites, who had financial influence retorted to discrimination in that, some neighborhoods were out of bound to blacks. This meant that the nation was separated into two, black and poor versus white and rich. In this case, the nation could not function as a democracy as the whites, how took all the power did not allow African leaders to claim any form of leadership position. Additionally, the country’s economic situation was deteriorating for the blacks as all important resources were acquired by the whites who had invested in manufacturing companies. With reflection to the resources that have been reviewed and taught for this module, it is seen that South Africa compares with other nations such as German and Korea. However, while there is East and West Germany as well as North and South Korea, South Africa is similar to these nations as it has suffered period of political and social divide (History of Apartheid in South Africa, 2011). On the other hand, the situation in South Africa is different from the situations portrayed in Germany and Korea. While Germany and Korea have distinct boundaries that separate different political regimes, communist and democratic, South Africa is a solid nation which suffered from racial discrimination. With reference to British influence on the country, various executions of black people were a common trend within the nation. However, while Korean Peninsula, under contest between North and South Korea remains subject to conflict, South Africa has entered a democratic system of governance that has unified the conflicting sides (Knight, 2006). The German unification applied the concept of two-nations-one people while the Korean applies the one-nation-two-regimes. In this case, Germany has been able to sideline her political and physical differences for the sake of national and regional development. On the other hand, Korea unification has separated North and South Korea

Applying theories to learning Essay Example | Topics and Well Written Essays - 1500 words

Applying theories to learning - Essay Example This paper explores the relevance and impact of learning theories, especially in relation to my personal practice within a secondary school. In addition, the paper seeks to attain insights into the harmonies and conflicts that may prevail within the current educational discourse. In a special way, the paper explores diverse ways in which instructors model their teaching styles and strategies in order to match the learners’ needs and preferences. Theory and Practice of Teaching and Learning Learning theories and models are diverse and encompass behaviourist, cognitivist and constructivist, social, situational, motivational and humanist. Behaviourist perspectives hold three assumptions. To start with, they focus on observable behaviour rather than internal cognitive processes. Secondly, learning and behaviour are critically influenced by the environment. Thirdly, the principles of contiguity and reinforcement are principal to the explanation of the learning process. This approac h has inspired educational practices such as systematic design of instruction, behavioural and performance perspectives, programmed instruction, and instructor accountability. Cognitive orientation to learning, on the other hand, address processes that occur inside the brain and nervous system as a person learns. This approach shares the assertion that people actively process information, and that learning takes place via the efforts of the learner (Leonard 2002, p.5). Cognitive approach encompasses mental processes comprising of inputting, organizing, storing, retrieving and constructing links between information. Humanist orientation to learning emphasizes the potential for individual growth within the learner. Humanists introduce affective functioning of a person into the arena of learning. Humanists favour the notion that human beings can control their own destiny. In addition, they hold that humans are intrinsically enjoyable and desire a better world for themselves and others. Thus, any behaviour is a consequence of a person’s choice and that people are active agents in learning (Phillips & Soltis 2004, p.3). Social approach to learning highlights the interactions between people and views them as the central mechanism of learning. According to this approach, learning is grounded in observation of others within the social setting. The educational concepts that arise from this approach include motivational strategies, locus of control, social role acquisition, and the efficacy of interaction of learner with the environment and the other learners (Sullo 2007, p.4). Constructivist approach to learning perceives the learning process as involving construction of meaning from experience. According to this approach, the locus of learning lies in internal construction of reality by an individual. Learning Styles and Strategies Learning styles can be regarded as cognitive, affective, and psychological behaviours that are comparatively stable signs of how le arners perceive, interact with, and react to the learning environment. The physical domain of learning style incorporate visual, auditory and motor styles while cognitive domain spotlights concrete, abstract, sequential, and random styles (Hawk & Shah 2007, p.5). Affective domain, on the other hand, encompasses external and internal physiological and psychological factors that influence how people feel. The Index of Learning Styles (ILS) proposes four

Compare and contrast Essay Example | Topics and Well Written Essays - 250 words - 5

Compare and contrast - Essay Example Programming is a diverse world of symbols and logic where emotions and people stand aside. The addiction of virtual world and the attachment and detachment from the real world, has resonance in it. On the other hand Bill in his book, â€Å"Why the future doesn’t need us†, shares his apprehensions regarding the advancements in nanotechnology, genetics and robotics technology. He significantly talks about the upper hand technology has on human’s capability and the rapid success and progression in nanotechnology which could be used more destructively than constructively. Bill shared his opinion about the ethical issues stirred up due to genetic technology and hence public has condemned about it as well. His apprehensions further lead to NBC era when literacy of GPR technology would be enough to produce mass destructive weapons even with low resources. Thus, it would increase incurable diseases, with lack of work and exercise for humans which in turn would empower technology over human

Environmental sae Assignment Example | Topics and Well Written Essays - 250 words

Environmental sae - Assignment Example The various footprints left by the modern progressive man are bringing us close to an unstoppable catastrophic end. Understanding our role in this damage and providing a healing touch is a shared responsibility of every global citizen. My connect with nature dates back to memories of childhood where thankfully technology was much primitive and we were not exposed to the myriad of gizmos that an average kid today is offered. Our playtime meant outdoor activities where each moment we were touching and connecting with Nature. Vacations meant a tour to our native countryside, where we were awakened by the rustling breeze, tweeting birds and the chirping of the insects. We often snacked on the farm grown fruits and vegetables. Our hands did not hold any videogame but were soiled with mud. Touching and feeling the soil is such a great euphoria, you find an instant connect with nature. Camping nostalgia were filled with the unfolding mysteries of the night, of trying to decipher what the whispers of the nocturnal life conveyed to us, of what the retired life forms anxieties were. As much as we enjoyed absorbing ourselves in storybooks, we cherished lying endlessly under a clear sky gazing at the stars. I remember often t aking to nature trails, where we learnt about numerous animals, insects, birds, plants, habitats and all that you now hunt in libraries. The learning was natural and permanent. The love for the environment was instilled effortlessly and for life. The intimacy I had with Nature has created an eternal bond. I am immensely thankful to the upbringing I had which has led to my acquaintance with the earth in such a positive manner. My rearing days in which nature was so much a part, has molded my entire persona and brought calmness to my ethos. Childhood learning is etched permanently in our character. It has built herculean sensitivity and a responsibility towards the environment. The growing up years in Nature’s arms has not only

Zipcar Essay Example | Topics and Well Written Essays - 750 words

Zipcar - Essay Example It can be apparently said that in the US car rental market, as per 2011 statistical records, revenue touched a record high with the process of generation of over $1000, per unit for the entire US market, thereby bringing into focus the various levels of efficiencies that has been achieved by the players in the particular market (Arn.com 2012). However, it can be said that the entire market for this business is highly vulnerable to various factors of macro and micro economic nature (IbisWorld.com 2012). Item 2. The young car rental company Zipcar has increasingly focused its forward approach on various strategies with regards to capitalizing on the various prospects that are associated with the growth of the company as well as its sustenance in the car rental market in the presence of big competitors and tremendous competition and market pressure in the long term. For the purpose of attaining significant growth and business edge, Zipcar focused on effective segmentation and targeting. By the focusing on the opportunity of targeting college crowd for its rental services, it developed a unique market to serve and thereby developing an edge over the others. It can be said that while this certainly provided an edge at the beginning, but it may not be sustainable in the long term as competitors may increasingly target the same market. Also, from the damage point of view, the cost of maintaining the resources while catering to the target market is also significantly high. The financial analysis a lso supports the fact of high operating expenses for the company. The evaluation of the financial performance over the 3 year period shows that thought the company had an increase in revenue yet the cost related to fleet operations also went up. It also revealed that the operating expenses also increased over the period. So, it can be said that servicing the college student are coming out as a little expensive over the years. Talking in terms of the company’s long term prospects, it can be said that the company is yet to get established in a secured manner. The reason behind that is because though the company has achieved a significant growth in revenue yet its operational expenses are also increasing. Despite the high growth rate, it is not very effective for a new company to have high operating costs as the chances of maintaining profits will gets reduced with the company’s attainment of capacity as well as market saturation by other car rental companies. Apart from this, it also has to be taken in to account that the company’s main competitive edge of servicing the college students can be targeted by well established rival companies, thereby reducing the company’s standalone advantages. The company should focus on increasing the efficiency in terms of economies of scale by reducing cost of operations for the purpose of securing itself over the long term. Item 3. It can be said t

Impact of Social Class on Australians’ Life Chances Essay Example for Free

Impact of Social Class on Australians’ Life Chances Essay Sociologists will define class as categories in the society which are based on income, status, or the way they are viewed by the society. A Marxist analysis on the other hand features on the level of influence an individual has on the means of production. Matthews (2007) further defines a capitalist class which he says that it is the class that owns and controls most of the productive capital in the society. He says that in Australia, this class amounted to 5 % of the entire population in the year 1998. Theories have been developed about class that has resulted to numerous and conflicting ideas and researchers had to shift from using class as a theoretical framework for research. The dismissal of class analysis of various societal institutions as dogmatic, and ideological led McLaren Farahmandpur to state that â€Å"matters of class power are sanitized and its powerful effects on the life chances of working-class students is denuded or made invisible,† (Pearce, Down Moore 2008, para. 2). In Australia, about two thirds of the population is in the working class. These are people whose only productive asset is the ability to work. They sell their labour power to their employers who can range from the state, individual capitalists among others, in order to receive a wage which will enable them make ends meet. Another popular class is the middle class which can be said to be composed of individuals who own small businesses. They rely on their own labour power to produce output. They are however being driven away and into bankruptcy by large capital firms. There still exists the ruling class; they carry more social weight and power than the rest of the citizens. They have a direct influence on economic policies being developed in the nation. They support politicians and government, politically and financially. The state can also be categorized in this class as it is responsible for making and implementation of the law (Matthews 2007). Impact to Education There exists inequality in the access of university education, underachievement in education correlates negatively with the social class. Children from low-income families have limited access to educational resources. Their parents rarely get enough time to help them with their day to day challenges at school as they are so much occupied in their work places. They work even over time in order to sustain their families. Some parents in the working class lack education and therefore they would be of little help to help their children in doing their homework, they would also not be in a position to afford employing tutors and this affects their children’s education (Taylor Fraser 2003). Expectations on the working-class students are that they should conform to the middle-class. They thus seek to achieve this status and power mostly not for their own gain but in order to improve the life chances of others in the similar background. They are more focused in giving back to the community in which they originated rather than seeking their improvement in form of class status. A strong sense of solidarity is evident in these students as they have an increased desire to use their qualifications and professional status to achieve a better life for themselves and others who are like them. They have a passion to bridge the gap between the two classes which they believe that a lot has still to be done as the inequality gap is too large (Lins-Dyer Nucci 2007). The discriminatory education system has unquantifiable damages that are done to individuals and the society at large. People have been left behind in the system, others have been discouraged while yet a quite good proportion has been excluded from the system. It would not be unrealistic to claim that social and economic damage is being done through educational discrimination. When â€Å"Professor Janet McCalman analysed the places where those in the Australian who’s who 1988 went to school,† it was clear that these leaders in business professions and politics went to the older private schools (Moorhouse 2010, p. 1). McGregor (1997), views being in the working-class as being equal to being underprivileged, he asserts that people in this class earn and own less, their access to life privileges is minimal as they have poorer education and other goods from the society. In general, the opportunity that they have for good life is such minimal that with a very small degree of error, we can claim that equal opportunity does not exist in Australia. Impact to Health It is no wonder that health outcomes really vary with the social class. The characteristics of different social classes can be depicted by a view on Morbidity and mortality rates. The lower class shows a greater array of lower mortality rates and greater health problems (Greig, Lewins White, 2003). These differences are very clear and distinct at birth and throughout the human life cycle. Henry (2001) identifies domains in which health disparity issues differ by the social class. They include psychological domain which contains norms habits, and behavioural intentions. The other is listed as behavioural constraints which include economic resources and situational effects. Physical influences that include physiological stress, genetic dispositions and environmental conditions Behavioural constraints involve barriers that prevent one from engaging in health promoting behaviour. These inhibitors are listed by Henry (2001) as economic resources and situation constraints. Economic resources inhibitors are financial limitations that prevent individuals from obtaining health facilities goods, while situational constraints are factors that limit the access to these health facilities. They range from lack of adequate health facilities in the community, poor transportation or lack of proper time management in the utility of such services. Physical influences on the other hand are the conditions which impact physiological health directly. He groups them into environmental conditions, physiological stress and genetics A decline in the health is observed as one move down the classes. The middle class  Public awareness and educational programs can be developed to ensure that health equality is maintained. Social class has taken a critical point in the studies of health, the coronary heart disease for instance had been considered as a disease for the upper class. On the other hand, the lower class (working-class) have been found to have prevalent lower life expectancy, higher mortality rates and increased mental disorders. Inequality in income brings about psychosocial stress which is a factor that increases the mortality rate; it has become apparent that mental illness prevalence has been found among the working class. A direct relationship has been identified to exist between poverty and increase in emotional disturbance. This has led to an increase of psychiatric disorders, drug and alcohol dependence on the working class (Murali Oyebode 2004). According to The Demography of Medical Schools, 59% of applicants in medical school usually come from high social classes. This makes us suspect that a discriminatory rule is being used in the medical institutions. However, admissions procedures in these schools seem to favour certain social classes in comparison to others. Requirements such as previous experience in a hospital are being considered for some medical school administration. This curtails the number of students enrolling to such schools as it proves cumbersome to attain such qualifications for most people in the working class. The access to opportunities has been limited for many students and this explains the reason why such patterns of students’ enrolment are being reflected (The Medical News 2004). The nature of the working class has really changed in Australia with over 65% of the work force being employed in the white-collar jobs. In fact if by defining the working-class as those who have not attended university education, then it can be said that Australia has graduated to the middle-class. It is surprising to note that the vast majority of white-collar jobs holders are part of the working-class. They have less control of their work which is even lower than that of blue-collar workers, consequently implying lower wages (Castles 1994). It is very clear that in Australia class has direct consequences on lifestyle. It affects the access to education and status attainment. A child raised in middle-class is more likely to end up in this middle class and the trend would be similar for a child raised in the middle-class. As we move up the social class, we are able to meet better health, education and other social facilities, which are transmitted to children. The trend thus seems to be perpetuated to future generations. A research conducted by Taylor and Fraser (2003) indicates the existence of a gap between children living in the different classes. The working class end up having stress in Parents relationships as they are unable to provide impeccable opportunities for their children. Children have in fact confessed that class is a factor that lead to social seclusion in academic life, and a contributing factor for educational disadvantage. Life’s chances are in this case affected by the mere fact that one belongs to a certain class that is either favoured or not by circumstances that prevail in the society. In Australia the government together with other institutions should be concerned and implement policies that would narrow the gap that exist between the various social classes. Such policies should focus on issues of adequate family income which will ensure that families have adequate resources to cater for the needs of their children and provide adequate opportunities for them, the welfare of workers should also be taken care of to ensure that each worker gets adequate time to attend to the family needs. In the school setting, policies should be developed to ensure that educational disadvantage has been reduced, and the cost of public education to be maintained as low as possible, to offer equal opportunities for children in all classes.  Affordable assistance should be accorded to specific children with learning difficulties in order to enhance excellence at all levels (Taylor Fraser 2003). Conclusion In conclusion it is very clear that Australia is faced with inequalities and other factors that enhance or inhibit opportunities that are available to children growing in this nation. There exists a challenge which should be looked at by all the policy makers in private and public enterprises, in order to ensure that the life chances of the children are not affected unfairly by the mere fact of belonging to a certain class.

How did Pterosaurs Move on the Ground?

How did Pterosaurs Move on the Ground? The locomotive manner of pterosaurs is a matter of intense dispute in the scientific community. The way that these prehistoric creatures traversed the ground is continually being contested. Did pterosaurs walk how we imagine them to have; on all fours in a semi erect posture, or did they only walk on their hind legs, or on all fours and completely prone? If, in fact, they did walk on all fours, would the feet have been in line with the hands, or would the hands be splayed out much farther than the feet? Because the method of pterosaur locomotion is widely disputed, scientists rely on footprint identification in order to determine if the tracks that they are studying do actually belong to a pterosaur. Unfortunately, even this is a contested issue, as some scientists cant even agree on which tracks belong to which prehistoric creatures. These are all issues that are disputed by scientists, but there does seem to be some common consensus when multiple seemingly conflicting scientific fi ndings are synthesized. The general perception of pterosaurs today is one that is possibly incredibly flawed because of theories about them from the early nineteenth century. Soemmerring confused a juvenile Pterodactylus with what he believed to be the skeleton of a deviant bat in 1817 and Cuviers identified pterosaurs as reptiles in 1812. These ideas have persisted until the modern day so that most people cannot shake the image of a pterosaur as a large, scaly, bat-like creature that walks around on all fours in a semi-erect fashion (Padian, 1983). While this is a possible form of locomotion, there are numerous arguments to the contrary. One of the first writings on pterosaur locomotion on land was Wm. Lee Stokes Pterodactyl Tracks from the Morrison Formation published in 1957. Stokes found a track of nine footprints that he attributed to a pterosaur that he named Pteraichnus Saltwashensis. Since pterodactyls are naturally found near bodies of whatever, its not out of the question that these tracks would belong to one. Stokes claims that the imprint of the manus shows the unique wrist and hand of a pterodactyl and that the imprint of the pes shows the unique V-shape and sharply pointed heel that corresponds unmistakably to that of a pterodactyl. He says that all of this is proof that at least one pterosaur was quadrupedal. Despite the evidence that Stoke says confirms that the creature that made these tracks was a pterosaur; this is one of the most disputed claims in the theory of the ground-level locomotion of pterosaurs. Many scientists believe that these tracks were not made by a pterosaur, but instead by a crocodilian creature. This is a distinct possibility because the tracks of pterosaurs and crocodilians are commonly confused for one another. In The Fossil Trackway Pteraichnus: Not Pterosaurian, but Crocodilian, Kevin Padian and Paul Olsen claim that the tracks that Stokes attributes to Pteraichnus Saltwashensis are more likely the product of one of the four species of crocodilian known to have inhabited that area. They say that the pes is not unique to pterodactyloids, as crocodiles also exhibit four toes and a V-shaped heel. Also, they claim that the manus does not consist of four digits, but five, even though the impression of all five is not clearly preserved. Another distinguishing feature is that crocodiles are plantigrade and therefore the heel print would be visible, as it is in these tracks. This is opposed to the digitigrade nature of pterosaurs, which would cause the heel print to be excluded from the footprint. Padian and Olsen claim that the manner of movement that the footprints represent is completely different than the kind that Stokes claims created them. Stokes suggested that the depth of the depression created by the manus was due to a large wing knuckle. Padian and Olsen argue that this is not the case, and that the depression was actually caused by the force of the step and the incompetence of the substrate that led to the creation of the fossilized track. One of Padian and Olsens points is refuted in Terrestrial Locomotion of the Pterosaurs: A Reconstruction Based on Pteraichnus Trackways, published in 1997 by S. Cristopher Bennett. Padian and Olsen claim that by using Bairds method, they were able to determine that the length of the body that made the tracks was too long to be that of a pterosaur, but long enough to be a short crocodile. Bennetts refutation of this point rests on the idea that Bairds method was intended to be used on tracks created simultaneously and that this was not the condition under which the tracks in contention were created. Whether this refutation is credible or not is of little importance. Padian and Olsens assertion that the Pteraichnus tracks were actually created by a crocodilian, and that they back it up with plausible scientific hypotheses, casts enough doubt on Stokes original claim to make these tracks inadmissible in determining how pterosaurs moved on land. The primary reason for the possible mistak e that these crocodilian tracks were created by a pterosaur, according to Padians 1983 paper, A Functional Analysis of Flying and Walking in Pterosaurs, is that Owen suspend[ed] the principles of comparative anatomy [and drew] spurious comparisons between pterosaur structures and those of lizards and crocodiles [as well as] misrepresenting the work of H. von Meyer, the German authority on pterosaurs. This paper offers an in depth analysis of the way a pterosaur would move on land based entirely on its bone structure. Padians primary subject of analysis is a Pteranodon, which he claims, among other things, was an active flyer, meaning that it flapped its wings. Padian claims that a pterosaur would walk upright on two legs as opposed to any form of quadripedal motion. He compares pterosaurs to both birds and bats throughout the paper. He attempts to show that the attributes that pterosaurs share with either birds or bats, or both of them, would prevent a pterosaur from being capable of quadrupedal locomotion. Padian says that the forelimb of the pterosaur was adapted entirely for flying and not for quadrupedal walking. The humerus bone of the forearm was adapted for the type of movement that facilitated a down-and-forward flapping motion, since Padian claims that pterosaurs were active flyers, and not for the rotation of the humerus that would protract the forearm to facilitate terrestrial walking. Moving down the arm, the elbow joint in birds, bats, and pterosaurs are what allow for rotation. In bats, this allows for quadrapedal walking but, in both birds and pterosaurs, it has hindered articulation to the extent of turning their limbs into pulley-like hinges with a wide arc of movement possible in only one plane (Padian 1983, 227). Padian claims that the differences in the shape of humeral heads in pterosaurs were even more restrictive in the pterosaurs range of motion than it is in birds. The delto-pectoral crest in pterosaurs was pronounced and twisted along the axis of the shaft, whi ch caused the deltoideus muscle to actually reverse the rotation of the humerus that was initiated by the pectoralis muscles as the pterosaur made a downward stroke while in flight. This reversal in rotation prohibited the forelimb from being moved into the proper position to facilitate its placement on the ground and therefore any form of quadrupedal locomotion. Ultimately, Padian asserts, the structure of the forelimbs of pterosaurs prevented them from walking quadrapedally. They were incapable of parasagittal movement over the ground because of restrictions imposed on them from their bone and muscular structures. The structure of the hind legs of pterosaurs that are included in Padians argument for a bipedal pterosaur is equally as important as the structure of the forelimbs. Padian bases his argument on a pterosaur thats wing was not attached to its hind legs and the idea that despite the relatively small size of the legs of a pterosaur when compared to the rest of its body and specifically its forelimbs, it would still have been able to, and in fact been solely capable of, bipedal locomotion on its hind limbs. Padian reconstructs the pelvis and hip joints of a pterosaur to show that certain elements of its anatomy would prevent it from bending forward in a way that would enable quadrupedal locomotion. He says that there are two girdles surrounding the point where the femur is inserted into the hip that restricts the degree of rotation of the leg so that it would be impossible to move in any way other than bipedally. Padian uses a Pteranodon as his case study for a pterosaur with an extremely large upper body and a relatively small lower body that is still able to walk on the ground. He says that the reason the forelimbs are so large is because the mass of the Pteranodon necessitated expansive wings to provide the appropriate amount of lift while airborne. The size of the wings, though, is not correlated to the size of the legs. The surface area of the wings needed to increase at a rate of L^3/L^2 when compared to the size of the body. The disproportionate lengthening of the wing afforded a greater relative area that allowed the Pteranodon to achieve flight. On the other hand, the Pteranodons legs are not restricted to the same ratio. The legs can be, and are, significantly smaller than the body that theyre supporting without compromising the Pteranodons terrestrial locomotive abilities. In fact, the size of the Pteranodons hind limbs in relation to the size of the rest of its body is comparable to the relationship between the hind limbs and bodies of all other pterosaurs. Padian compares the bone structure of the hind limbs of pterosaurs to the bone structure of the hind limbs in modern birds. He says that, like in birds, the tibia is the main load-bearing bone in the leg. He claims that the femur had a position that ranged between slightly above horizontal to about forty-five degrees below it and that this orientation allowed for the tibia to move on a parasagittal plane. This essentially means that pterosaurs moved on the ground like most other bipedal dinosaurs. Padians ultimate claim is that pterosaur hind limbs were designed for bipedal, digitigrade, locomotion when they were moving on the ground. He even suggests that it was possible for pterosaurs to achieve high rates of speed on the ground. S. Christopher Bennett is another proponent of the upright, bipedal form of terrestrial locomotion among pterosaurs, but only among the larger pterodactyloids. He exams the acetabulum of Anhanguera, Pteranodon, and Dsungaripterus in A Pterodectyloid Pterosaur Pelvis from the Santana Formation of Brazil: Implications for Terrestrial Locomotion, published in 1990, and determines that its strongest part is the anterior wall. He suggests that the strength of this anterior wall allows for upright bipedal locomotion because the acetabulum becomes a downward facing component of the anatomy. This downward orientation allows for a large area of contact for the head of the femur and, therefore, the weight of the body of the pterosaur can be supported in an upright position. Bennett refutes three arguments that are often leveled against bipedal locomotion in pterosaurs. He says that the femora bone could, in fact, have been brought underneath the body of the pterosaur, which is demonstrated by AMNH 22569. Secondly, that the hind limbs of the pterosaurs had straight femurs with distinct, inturned heads, mesotarsal ankles without a calcaneal tuber, and a foot with elongated metatarsals. Finally, he argues that the preservation of pterosaurs, in a position with their hind limbs splayed to the sides, a position that has caused many scientists to claim that theyre incapable of bipedal locomotion, is a false supposition. He notes five specimens that were preserved with their hind limbs on one side of the body, and argues that the splayed nature of the other specimens is due to greater hip flexibility in pterosaurs. Bennetts inclusion of the fossilized remains of pterosaurs in his argument for bipedal locomotion among the larger pterodactyloids is particularly convincing. He makes up for one of the key elements that Padians argument was missing, in that he actually gives concrete physical evidence to support his argument instead of supposed anatomical construction and the type of movement that that structure would or would not allow. One thing that Padians analysis of the terrestrial movement of pterosaurs lack is the actual fossilized track that a pterosaur made. While the supposed structure of the bones may lead one to believe that Padians claims are accurate, there are numerous pterosaur tracks that indicate a quadrupedal form of locomotion among pterosaurs. The majority of the studies included in this paper have focused on larger pterosaurs, and mostly on the Pteranodon. This particular pterosaur shares a large amount of its anatomy with modern birds and it makes sense that, from an analysis paying the majority of its attention to this pterosaur, they would all seem to be bipedal. There is evidence in other fossils, though, that would say otherwise. Pterosaurs, depending on the kind they were, were either bipedal or quadrupedal. Bennetts refutation of Padian and Olsens crocodilian diagnosis of the Pteraichnus tracks contains very valid points concerning the way that pterosaurs could have possibly walked in a quadrupedal manner. He says specifically that rhamphorhyncoids, the earlier variation of pterosaurs, as well as small pterodactyloids were quadrupeds with plantigrade pedes (Bennett, 1997). He says that the model he constructed of Pterydactylus and that, along with other detailed studies and manipulations of other three-dimensionally preserved pterosaur specimens, the limb and girdle joints would have easily allowed for the range of motion necessary for a pterosaur to achieve a quadrupedal walking motion. Bennett cites the Pteraichnus saltwashensis tracks as being representative of a quadrupedal pterosaur, which was disavowed earlier in this paper. He validly examines the tracks of Pteraichnus stokesi that were discovered in the Sundance Formation of Wyoming as well as pterosaur tracks from the Upper Jurassic of France. These trackways show manus and pes prints that are clearly pterosaurian. This indicates that there were certain species of pterosaur located in these areas that were quadrupedal. All of Bennetts are based on the principle of identifying the tracks as pterosaurian based on the structure of the manus and pes. Another piece of research that proves that quadrupedal locomotion was present in pterosaurs is First Record of a Pterosaur Landing Trackway, published in 2009 by Jean-Michel Mazin, Jean-Paul Billon-Bruyat, and Kevin Padian. The tracks that they are examining are clearly the landing pattern of a pterosaur because they originate with two pes prints and then continue on in a walking pattern. They claim that the stance of the pterosaur was erect because the pedes tracks are placed almost directly below the hip joints. After the first impression of the pedes, the second impression includes both pedes and manus impressions. The impressions of the manus are splayed out wider than pes, which is the generally accepted idea of how a pterosaur would ambulate. The tracks, not only created by a flying creature, are located in the Late Jurassic site known as Pterosaur Beach, which is a place universally agreed upon to contain unquestionable pterosaur tracks. Therefore, the landing pattern and subs equent tracks, that clearly show quadrupedal locomotion, prove that at least some pterosaurs moved in this way on the ground. The debate surrounding the terrestrial locomotion of pterosaurs can be broken down into many categories and subdivisions. Its clearly that one form of locomotion, whether it be bipedal, quadrupedal, plantigrade, digitigrade, erect, semi-erect, or any other distinction, cannot be used to define every single pterosaur that ever existed. This is similar to the idea that one form of locomotion cannot be used to describe every dinosaur that ever existed. There is variation between species of pterosaurs. The larger pterosaurs seem to be generally more bird-like and more inclined to quadrupedal locomotion. The Pteranodon, specifically, almost definitely was a biped. Its wing structure was the most similar to that of a bird (Padian, 1983), and its two hind limbs were more than sufficient for bothing locomotion and launching off from the ground in order to initiate flight. Smaller pterosaurs, on the other hand seem to be more similar in locomotive method to the general perception of how pterosaurs moved, in a kind of quadrupedal crawl. The tracks found at Pterosaur Beach, and if actually created by a pterosaur, those of Pteraichnus saltwashensis, prove that at least some smaller pterosaurs were quadrupedal. In conclusion, any attempt to define the entire order of Pterosauria as quadrupedal or bipedal is an exercise in futility. The larger pterosaurs, such as Pteranodon, were bipedal, which is apparent based on their wing and leg structures. They would have been unable to move their forelimbs into a position that would allow them to place them on the ground and the mobility of their hind limbs allowed only for bipedal locomotion. Smaller pterosaurs, such as Pteraichnus stokes, were definitely quadrupedal in terms of locomotion since there have been numerous tracks found confirming this idea. Works Cited Bennett, S. (1990). A Pterodactyloid Pterosaur Pelvis from the Santana Formation of Brazil: Implications for Terrestrial Locomotion. Journal of Vertebrate Paleontology, 10(1), 80-85. Retrieved from http://www.jstor.org/stable/4523298 Bennett, S. (1997). Terrestrial Locomotion of Pterosaurs: A Reconstruction Base on Pteraichnus Trackways. Journal of Vertebrate Paleontology, 17(1), 104-113. Retrieved from http://www.jstor.org/stable/4523790 Mazin, J., Billon-Bruyat, J., Padian, K. (2009). First Record of a Pterosaur Landing Trackway. Proceedings: Biological Sciences, 276(1674), 3881-3886. Retrieved from http://www.jstor.org/stable/30245351 Padian, K. (1983). A Functional Analysis of Flying and Walking in Pterosaurs. Paleobiology, 9(3), 218-239. Retrieved from http://www.jstor.org/stable/2400656 Padian, K., Olsen, P. (1984). The Fossil Trackway Pteraichnus: Not Pterosaurian, but Crocodilian. Journal of Paleontology, 58(1), 178-184. Retrieved from http://www.jstor.org/stable/1304743 Sà ¡nchez-Hernà ¡ndez, B., Przewieslik, A., Benton, M. (2009). A Reassessment of the Pteraichnus Ichnospecies from the Early Cretaceous of Soria Province, Spain. Journal of Vertebrate Paleontology, 29(2), 487-497. Retrieved from http://www.jstor.org/stable/20627057 Wm. Lee Stokes. (1957). Pterodactyl Tracks from the Morrison Formation. Journal of Paleontology, 31(5), 952-954. Retrieved from http://www.jstor.org/stable/1300563 Drug Abuse in Kuala Lumpur, Malaysia | Research Proposal Drug Abuse in Kuala Lumpur, Malaysia | Research Proposal BACKGROUND STUDY Drug abuse is a cause of concern to all nations around the world either in developing countries and undeveloped countries and in both cases the most affected are the youth,. Due to the rapid increase in drug related crime and drug abusers in Asian countries, the establishment of effective countermeasures for demand and supply reduction are a pressing issue. And if they are all left out to be addicted to dangerous narcotics, it can lead to all social ills like road accidents, high crime rates, unplanned pregnancies, school dropouts and many more which may result in fracturing the moral fibre of the country and eventually the nation will be without prominent future leaders. The abuse of drugs has an adverse impact, not only on the individual abuser, but also on the economy and society of a country as a whole. According to Scorzelli JF, (2009) despite the heavy punishment of death imposed by the Malaysian government for whoever is caught in drug possession, within the last five years, the Malaysian drug abuse problem has escalated. This has led to the increase in social ills like HIV/AIDS which is contracted by the use of IV-Heroin. He continued to state that 93.7% of people caught in drug possession are male aged between 20-29 years of age. This clearly shows that our youth are in dire need of thorough drug and peer education. The National Anti-Drug Agency has been on track to get rid of the drug problem in Malaysia by 2015. When interviewed by the New Straits Times (2010, February) the director-general Datuk Abdul Bakir Zin has pointed out that they have helped out around the country to bring addicts to their rehabilitation centre. He has said that the centre spends around RM 300 million which is their annual budget which is nearly spent on prevention, treatment, rehabilitation of addicts and enforcement operations. Addicts are kept for two years and they are released but some of them go back to their bad habits. STATEMENT OF THE PROBLEM Drug abuse has led to an alarming increase of social ills in the society like HIV/AIDS contraction , road accidents and many more which have resulted in the collapse of the moral fibre of the nation. The medical and psychological effects are very obvious. Addicts cannot function as normal members of society. They neglect or abuse their families, and eventually require expensive treatment or hospitalization. Huge police resources are needed to fight smuggling and dealing. Criminal gangs and mafia underworlds develop with the money from drugs. However the main target should be the user. Families and counsellors need to talk to children and people at risk. The fact that the youth is the most affected especially in Malaysia poses a great concern because the youth are the future leaders of tomorrow. OBJECTIVES OF THE STUDY The specific study of the study is to find ways and methods to educate the people of Malaysia especially the youth about the dangers posed by the abuse of drugs. This initiative itself can lead to positive results such as reduced number of drug abusers therefore leading to a low numbers of social ills such as HIV contractions and crime. There should be a diversion programme for drug abusers which can be institutional or community based. RESEARCH QUESTIONS To justify this study, the researcher will investigate the following matters: How many cases of illicit drugs were registered from 2006 to 2011 in Malaysia How individuals are affected psychologically, physically and economically by the abuse of drugs Does the government play a role in reducing the problem of drug abuse? SIGNIFICANCE OF STUDY Generally the study of drug abuse phenomenon that is widely occurring in Malaysia will be an endeavour in promoting a much healthy lifestyle that is a drug -free society. Drug-free society means a lot to a country of about 28,310,000 people. It means less crime such as road accidents, thefts and murders, less HIV AIDS positive, less people in the narcotics rehabilitations centre and more manpower in order to bring Malaysia towards becoming a fully developed country. By understanding the main source of the problems, we can all move together to cure as well as to prevent further advance of this spreading illness in our community. The Malaysian psychiatric association (July 6 2006) has cited that when pregnant women abuse drugs there may be foetal abnormalities especially when the pregnancy is early. These deformities may cause the mother to dump the baby, a crime which is currently on the rise in Malaysia. If the drug was used late in the pregnancy may become dependent on opiates, and may later show withdrawal symptoms after delivery. The United Nations Aids (2010) on their report have pointed out that an estimated 170,000 injecting drug users (IDUs). In those users most of them share the needles therefore there is increased spread of the diseases such as HIV/AIDS because likely they do not sterilise such needles. Moreover, this study will reveal most of things behind these drug abuse cases, therefore will significantly boost the awareness of the community about the cases of drug abuse in this country simultaneously contribute in reducing such cases in community. SCOPE OF THE REPORT We undertook the task of reviewing all studies describing the impact of drug abuse at Kuala Lumpur. The population of interest includes injection drug users, and non-injection drug users of heroin, cocaine and marijuana, because these groups of individuals have been identified as having a biological risk of exposure to addictive drug use, including deadly exposure (via injection drug use) to blood-borne via sharing of straws or pipes used to administer drugs (non-injection drug use). Data from questionnaires are analyzed separately, as they different substantially form interview data, and because their drug-related risk factors are quite different and not elaborated further. Another goal is to examine the influence of study methodology on study findings, particularly because the descriptive data may be strongly influenced by sampling methods, and because study design may affect associations between various characteristics and drug use. Since the brand data collection was carried out using information collected from various associations, access to each data was time consuming. We also do not have any compiled data of approved unregistered drug users making the task very complicated. Such database may be hard to acquire as most drug users choose to stay in the dark as they know there is a capital punishment for such a crime. OPERATIONAL DEFINITION Drugs A medicine or other substance which has a physiological effect when ingested or otherwise introduced into the body Abuse To use something to bad effect or for a bad purpose Addict A person who is addicted to a particular substance Rehabilitation Restore to former privileges CHAPTER 2: LITERATURE REVIEW 2.0 Introduction In the literature review we compare and contrast studies done by other people and we note how different they are from ours. We have read journals, books and articles in Science Direct. In this chapter we are able to expand our knowledge on how other writers view the issue at hand. We have displayed various ways of the data we found, either by citing using the APA format, images and tables. 2.1 Literature Review By the year 1983, the problem of drugs was declared a national emergency by the Malaysian government. Everyone convicted of trafficking and those caught with the drugs depending on the amount of drugs they had in their possession were sentenced to death, those were some of the ways the government was trying to solve the problem but if someone was convicted of only for possession of drugs he/she was put in a rehabilitation centre for 2 years. Once realised from the centre, the individual has one year of probation were he or she has two urine tests a month. Drug, taken from Cambridge Dictionaries Online, falls into two categories which are medicine and illegal substance. In the medicine category, the word drug means any natural or artificially made chemical which is used as a medicine while in the category of illegal substance, drug means any natural or artificially made chemical which is taken for pleasure, to improve someones performance of an activity, or because a person cannot stop using it. The latter meanings actually portraying the main interest in this study which is the action of drug abuse, which by the same source, abuse means to use or treat someone or something wrongly or badly, especially in a way that is to your own advantage. This unhealthy phenomenon is actually a worldwide crisis and can bring along a great impact in ones life, consequently a community, and then will affect the growth of a country. Some said that this crisis is the same age as humankind. It is in our nature that we like to consume things that bring us pleasure and being in the state of euphoria. However, we must first consider the side effects of the consumption of such substances. There was enormous number of researches that had been carried out in order to suppress or banish this crisis all over the world. There are ups and downs for the trends of the drug abuse cases but it had never been ceased completely. Kuala Lumpur as a busy place, most of the inhabitants need drugs to cope with the fast life. These drugs can be addictive substances such as heroine, alcohol, and ecstasy pills. The research by the Malaysian Psychiatric Association (2006), showed that the brain is affected by the consumed drugs. The left part of the brain is affected is called the reward pathway. Continued use of drugs short-circuits the reward pathway and that how addiction starts. The brain will then need more and more large quantities of the substance taken over time. The brain chemistry is altered at this point, therefore behavioural patterns starts here. Drugs like cocaine can lead to permanent damage, death and even addition. From the article adapted from RECOVERY NOW website on cocaine effects, it is stated that there are two different categories of cocaine effect. These effects are said to be long termed and short termed .Regardless of how many times a person uses cocaine even once! heshe experiences short-term cocaine effects which includes increased blood pressure, mental alertness, increased heart rate, decreased appetite and increased body temperature .The long term effects appear after increased periods of use. Long term effects include irritability, mood disturbances and restlessness. Marijuana is also one of the most commonly abused drug and according to the American Council For Drug Education they describe it as a mild hallucinogen with some alcohols depressant which results in bronchitis, emphysema and bronchial asthma. They also continue to stress that marijuana leads to reduction of learning ability which is one of the reasons why most students who smoke marijuana end up performing badly at school as it limits the capability to absorb information as it is highly addictive. In an addiction state a person engages in a compulsive behaviour, even when faced with challenging life situations. Taking a look at the fast life in Kuala Lumpur a lot of challenges are faced by the youth there, these include unemployment, loss of a loved one or poverty. These situations can cause you to excessively use drugs to suppress such hurt felt within. The National Anti-Drug Agency (New Straits 12 February 2010) has used over RM 300 million annually to prevent, treat, and rehabilitate addicts. They are trying to achieve the goal for a drug-free Malaysia in 2015 and drug-free Malaysian schools in 2012. The director of the agency Datuk Abdul Bakir Zin has mentioned that there is an alarming rate of drug abusers on the increase. The agency successfully rehabilitated 11 395 addicts in 2009 but only 51% of the addicts are clean now. That shows that the drug addicts do not have enough out of rehab education. B.Vicknasigngam, M.Mazlan, K.S Schotchfield , M.C Chawaski(2009),stated that heroin and injection drug are the major public health risk cases recorded in Malaysia. Furthermore they continue to state from their findings, between the year 1998 and 2006 individuals close to 300 000 individuals were registered as persistent drug abusers in Malaysia. In between the years 1998-2006 heroin was the main primary drug abused around 62.6% of those were registered. And this caused a main concern for the Malaysian government as it lead to increase in social ills like road accidents and also the rise in HIV contraction as the drug abusers shared the same needle hence the spread of the virus was induced. Despite the Malaysian strict law on use of illegal drugs people still continue to use the illegal drugs and have even gone to an extent of making it into a business to finance their lifestyle. The law clearly states that any person found in possession of at least 15 grams of heroin, 200 grams of cannabis is presumed. The National Drug Agency, Malaysia in 2006 around 22,811 drugs users was recorded and 12,430 of whom were repeat offenders. They also stress that the total number of drug users recorded for the period of 1998-2006 is 300,241 people which constitutes to 1.1% of the Malaysians population. CHAPTER 3: METHODOLOGY 3.1 Introduction The introduction highlights the data collection methods which were used to gather information which enabled us to reach our conclusion. One of the vital aspects we looked into was the validity and reliability of the data collection methods that we decided to use. In our research we found that the ideal data collection methods that we can use are the questionnaire and interview for analysis Questionnaires are very cost effective when compared to face-to-face interviews. This is especially true for studies involving large sample sizes and large geographic areas. Written questionnaires become even more cost effective as the number of research questions increases. Questionnaires are easy to analyze. Data entry and tabulation for nearly all surveys can be easily done with many computer software packages. Nearly everyone has had some experience completing questionnaires and they generally do not make people apprehensive and they reduce bias. The researchers own opinions will not influence the respondent to answer questions in a certain manner. There are no verbal or visual clues to influence the respondent. When a respondent receives a questionnaire in the mail, he is free to complete the questionnaire on his own time-table. Unlike other research methods, the respondent is not interrupted by the research instrument. Some of the reasons why questionnaires are widely used as data collection method in reports and projects in the fact that the responses are gathered in a standardised way so questions are more objective, certainly more so than interviews, generally it is relatively quick to collect information using questionnaires and information can be collected from a large portion of a group. For our research a questionnaire, written both in English and Malay consisting of A3 size pages was sent to different agencies/organizations which were requested to answer it. The main contents of the questionnaire included; Prevention of drug abuse Outline organizations handling drug abuse problem Institutional treatment programmes for drug abusers Outline drug control laws Interviews are also one of the most convenient ways of data collection for reports projects and investigations as they provide first hand information from the correspondent. The interview is also flexible in the since that follow up questions can be asked, also clarity of the question can be made if the respondent does not understand. Even though it has overwhelming advantages one of its major problems maybe that the correspondent may feel like shy to give out information and in that case the interviewer can solve the problem by assuring the correspondent that whatever he/she is being interviewed for will be considered confidential at all costs. For our research, interviews were conducted with the relevant agencies/organizations. Firstly we set an appointment with them and informing them of our objectives.

Dc Power Source Utilization Engineering Essay

Dc Power Source Utilization Engineering Essay Many industrial applications have begun to require higher power apparatus in recent years. Some medium voltage motor drives and utility applications require medium voltage and megawatt power level. For a medium voltage grid, it is troublesome to connect only one power semiconductor switch directly. As a result, a multilevel power inverter structure has been introduced as an alternative in high power and medium voltage situations. A multilevel inverter is a power electronic device built to synthesize a desired AC voltage from several levels of DC voltages. The concept of multilevel converters has been introduced since 1975. The term multilevel began with the three-level converter. Subsequently, several multilevel converter topologies have been developed. Plentiful multilevel converter topologies have been proposed during the last two decades. Contemporary research has engaged novel converter topologies and unique modulation schemes. Moreover, there are three different major multilevel converter structures which are cascaded H-bridges converter with separate dc sources, diode clamped (neutral-clamped), and flying capacitors (capacitor clamped) [1] Although the diode clamped multilevel inverter is commonly discussed in the literature, there has been considerable interest in the series connected or cascaded H-bridge inverter topologies [2]. However, the elementary concept of a multilevel converter to achieve higher power is to use a series of power semiconductor switches with several lower voltage dc sources to perform the power conversio n by synthesizing a staircase voltage waveform. Capacitors, batteries, and renewable energy voltage sources can be used as the multiple dc voltage sources [1]. Multilevel power conversion has become increasingly popular in recent years due to advantages of high power quality waveforms, low electromagnetic compatibility (EMC) concerns, low switching losses, and high-voltage capability. The primary disadvantage of multilevel power conversion technology is the large number of semiconductor devices required. This does not yield a significant cost increase since lower-voltage devices may be used. However, an increase in gate drive circuitry and more elaborate mechanical layout are required [3]. Project Overview This project will involve in the design and construction of a single phase 3-level H-bridge inverter using the IGBTs. An H-bridge is an electronic circuit which enables a voltage to be applied across a load in either direction. These circuits allow DC motors to run forwards and backwards. H-bridges are available as integrated circuits, or can be built from discrete components. In this single phase H-bridge inverter circuit, the IGBTs are used as power devices that will be operated as a switch by applying control signal to gate terminal of IGBTs. The insulated gate bipolar transistor or IGBT is a three-terminal power semiconductor device, noted for high efficiency and fast switching. The software that will be used is MATLAB Simulink. Simulink is a commercial tool for modeling, simulating and analyzing multidomain dynamic systems. Its primary interface is a graphical block diagramming tool and a customizable set of block libraries. The Aims and Objectives The aim of this project is to simulate a single phase 3-level H-bridge inverter (DC to AC converter) using the MATLAB Simulink and constructed it. The objectives of this project are as follows: To investigate the application of H-bridge inverter. To assemble using the software, circuits implementation, and troubleshoot for the hardware. To analyze the operation of the single-phase 3-level inverter for software and hardware. CHAPTER 2 LITERATURE REVIEW Inverter Power electronics converters may be classified into four categories based on the source and types of the desired output characteristics as shown in Figure 1.1 below: OUTPUT AC DC AC INPUTRECTIFIER REGULATORS DC CHOPPERS INVERTERS Figure 2.1: Converter Classification DC-to-AC converter is known as inverter. The function of an inverter is to change a DC input voltage to a symmetrical AC output voltage of desired magnitude and frequency. The variable output voltage could be fixed or variable at a fixed or variable frequency. Inverter can be built in many output phases which is normally use in practice like single phase inverter and three phase inverter. The implementation of the inverter circuit must to be involved in application of the power devices like SCR, MOSFET, IGBT, GTO, and Forced-Commutated Thyristor which is controlled to turning ON and turning-OFF in its operation as a converter. This inverter generally use PWM control signal for producing an AC output voltage [3]. Single Phase H-Bridge Inverter Operation The H-Bridge Inverter or sometimes called Full Bridge consists of four switches (see Figure 2.2). A boost converter is required as this system has no means of stepping up the input. Switches S1-S4, and S2-S3 make up two switch pairs. When S1and S4 are on, the output voltage is a positive pulse, and when S2 and S3 are on, the output is a negative pulse. The phase sequence, frequency, output magnitude and harmonics can be controlled through appropriate switching devices, in conjunction with other equipment. Figure 2.2: Single phase H-bridge inverter Single Phase Multilevel H-Bridges Inverter There are two types of multilevel H-bridge inverter that can be selected in this project which are separated dc source and single DC source. These two types have its pros and cons. The advantages of separated DC source are: The number of possible output voltage levels is more than twice the number of dc sources (m = 2s + 1). The series of H-bridges makes for modularized layout and packaging. This will enable the manufacturing process to be done more quickly and cheaply. while the disadvantage is: Separate dc sources are required for each of the H-bridges. This will limit its application to products that already have multiple SDCSs readily available. Each H-bridge cell requires an isolated dc source. The isolated sources are typically provided from a transformer/rectifier arrangement, but may be supplied from batteries, capacitors or photovoltaic arrays to add up the output voltages. This topology was patented by Robicon Group in 1996 and is one of the companies standard drive products.[2] On the other hand, for the single DC source multilevel H-bridge inverter, the advantage of this type of connection is only one DC supply is used. This will not limit its application to products. And the disadvantage of single DC source is transformer is needed to add up the output voltages Separated DC Source Multilevel H-Bridges Inverter A single-phase structure of an m-level cascaded inverter is illustrated in Figure 2.3. Each separate dc source (SDCS) is connected to a single-phase full-bridge, or H-bridge, inverter. Each inverter level can generate three different voltage outputs, +Vdc, 0, and -Vdc by connecting the dc source to the ac output by different combinations of the four switches, S1, S2, S3, and S4. To obtain +Vdc, switches S1 and S4 are turned on, whereas -Vdc can be obtained by turning on switches S2 and S3. By turning on S1 and S2 or S3 and S4, the output voltage is 0. The ac outputs of each of the different full-bridge inverter levels are connected in series such that the synthesized voltage waveform is the sum of the inverter outputs. The number of output phase voltage levels m in a cascade inverter is defined by m = 2s+1, where s is the number of separate dc sources [1]. Figure 2.3: Single-phase structure of a multilevel cascaded H-bridges inverter An example phase voltage waveform for a nine-level cascaded inverter and all H-bridge cell output waveforms are shown in Figure 2.4. In this thesis, all dc voltages are assumed to be equal. According to sinusoidal-liked waveform, each H-bridge output waveform must be quarter-symmetric as illustrated by V1 waveform in Figure 2.2. Obviously, no even harmonic components are available in such a waveform. To minimize THD, all switching angles must be numerically calculated. Figure 2.4: Waveform showing a nine-level output phase voltage and each H-bridge output voltage. One of the advantages of this structure is the number of possible output voltage levels is more than twice the number of dc sources (m = 2s + 1). The other advantage is the series of H-bridges makes for modularized layout and packaging. This will enable the manufacturing process to be done more quickly and cheaply. On the other hand, the main disadvantage of this topology is that separate dc sources are required for each of the H-bridges. This will limit its application to products that already have multiple SDCSs readily available. The sources are typically provided from a transformer/rectifier arrangement, but may be supplied from batteries, capacitors or photovoltaic arrays. Single DC source Multilevel H-Bridges Inverter Referred to Zhong Du1, Leon M. Tolbert, John N. Chiasson, and Burak ÃÆ'-zpineci thesis entitled A Cascade Multilevel Inverter Using a Single DC Source, a method is presented showing that a cascade multilevel inverter can be implemented using only a single DC power source and capacitors. Without requiring transformers, the scheme proposed allows the use of a single DC power source for examples a battery or a fuel cell stack while the remaining nà ¢Ã‹â€ Ã¢â‚¬â„¢1 DC sources being capacitors. Figure 2.5 shows the Single DC source Multilevel H-Bridges Inverter. The DC source for the first H-bridge (H1) is a DC power source with an output voltage of Vdc, while the DC source for the second H-bridge (H2) is a capacitor voltage to be held at Vdc/2. The output voltage of the first H-bridge is denoted by v1 and the output of the second H-bridge is denoted by v2 so that the output of this two DC source cascade multilevel inverter is v(t) = v1(t)+v2(t). By opening and closing the switches of H1 appropriately, the output voltage v1 can be made equal to à ¢Ã‹â€ Ã¢â‚¬â„¢Vdc, 0, or Vdc while the output voltage of H2 can be made equal to à ¢Ã‹â€ Ã¢â‚¬â„¢Vdc/2, 0, or Vdc/2 by opening and closing its switches appropriately. Figure 2.5: Single DC source Multilevel H-Bridges Inverter IGBTs Versus MOSFETs The power MOSFET is a device that is voltage- and not current-controlled. MOSFETs have a positive temperature coefficient, stopping thermal runaway. The on-state-resistance has no theoretical limit, hence on-state losses can be far lower. The MOSFET also has a body-drain diode, which is particularly useful in dealing with limited free wheeling currents. All these advantages and the comparative elimination of the current tail soon meant that the MOSFET became the device of choice for power switch designs. Then in the 1980s the IGBT came along. The IGBT combines the cross between the power MOSFET and a bipolar power transistor (see Figure 2.2). The IGBT has the output switching and conduction characteristics of a bipolar transistor but is voltage-controlled like a MOSFET. In general, this means it has the advantages of high-current handling capability of a bipolar with the ease of control of a MOSFET. However, the IGBT still has the disadvantages of a comparatively large current tail and no body drain diode. Early versions of the IGBT are also prone to latch up, but nowadays, this is pretty well eliminated. Another potential problem with some IGBT types is the negative temperature co-efficient, which could lead to thermal runaway and makes the paralleling of devices hard to effectively achieve. This problem is now being addressed in the latest generations of IGBTs that are based on non-punch through (NPT) technology. This technology has the same basic IGBT structure (see Figure 2.6) bu t is based on bulk-diffused silicon, rather than the epitaxial material that both IGBTs and MOSFETs have historically used [4]. Figure 2.6: NPT IGBT cross section The comparisons between MOSFETs and IGBTs are as below: Table 2.1: Comparisons between IGBTs and MOSFETs IGBTs MOSFETs Characteristics Low duty cycle Low frequency ( Narrow or small line or load variations High-voltage applications (>1000V) >5kW output power Operation at high junction temperature is allowed (>100 °C) Long duty cycles High frequency applications (>200kHz) Wide line or load variations Low-voltage applications ( Applications Motor control: Frequency Uninterruptible power supply (UPS): Constant load, typically low frequency Welding: High average current, low frequency ( Low-power lighting: Low frequency ( Switch mode power supplies (SMPS): Hard switching above 200kHz Switch mode power supplies (SMPS): ZVS below 1000 watts Battery charging [4] Applications of Inverters There are many application of inverter available today. Some of the applications are as follows: DC power source utilization An inverter converts the DC electricity from sources such as batteries, solar panels, or fuel cells to AC electricity. The electricity can be at any required voltage; in particular it can operate AC equipment designed for mains operation, or rectified to produce DC at any desired voltage. Grid tie inverters can feed energy back into the distribution network because they produce alternating current with the same wave shape and frequency as supplied by the distribution system. They can also switch off automatically in the event of a blackout. Micro-inverters convert direct current from individual solar panels into alternating current for the electric grid. Electric vehicle drives Adjustable speed motor control inverters are currently used to power the traction motor in some electric locomotives and diesel-electric locomotives as well as some battery electric vehicles and hybrid electric highway vehicles such as the Toyota Prius. Various improvements in inverter technology are being developed specifically for electric vehicle applications. In vehicles with regenerative braking, the inverter also takes power from the motor (now acting as a generator) and stores it in the batteries. Uninterruptible power supplies An uninterruptible power supply (UPS) uses batteries and an inverter to supply AC power when main power is not available. When main power is restored, a rectifier is used to supply DC power to recharge the batteries. Variable-frequency drives A variable-frequency drive controls the operating speed of an AC motor by controlling the frequency and voltage of the power supplied to the motor. An inverter provides the controlled power. In most cases, the variable-frequency drive includes a rectifier so that DC power for the inverter can be provided from main AC power. Since an inverter is the key component, variable-frequency drives are sometimes called inverter drives or just inverters. Induction heating Inverters convert low frequency main AC power to a higher frequency for use in induction heating. To do this, AC power is first rectified to provide DC power. The inverter then changes the DC power to high frequency AC power. CHAPTER 3 METHODOLOGY Introduction This chapter exposes the proposed method of this project to built single phase multilevel H-bridge inverter. This project can be divided into two main parts of study which are software and hardware implementation. For the software part, the software used is PIC24 Compiler that used to do the programming for the microcontroller part and MATLAB to do the simulation of the inverter circuit before implemented it in hardware. In addition, Proteus 7 Professional is also used to simulate the driver circuit before do the hardware. The summary of the project is shown in Figure 3.1. Software Part Prepared (Microcontroller) Hardware Part Prepared Troubleshooting Interfacing Result Figure 3.1: The project summary Design of the H-Bridge Inverter System The H-Bridge inverter system can be divided into three main stages that were constructed. It is consists of: Microcontroller Power electronics driver Power electronics inverter Each part was treated as a separate functional block system. Figure 3.2 below shows the block diagram of how each stage of the inverter system are organized. Power electronic driver circuit and microcontroller stage is the low voltage side and power electronics inverter circuit is the high voltage side. DC Voltage Input AC Output Power Electronics Inverter Circuit Microcontroller Power Electronic Driver Circuit Figure 3.2: The block diagram of the inverter system Microcontroller Microcontroller is a computer-on-a-chip optimised to control electronic devices. The microcontroller chip used for this project is PIC16F877A. In this project, microcontroller is used to develop the triggering signal for the IGBTs and interfacing to the single phase inverter circuit as a control signal for the gate driver. To implement the microcontroller part, the program for triggering the IGBTs was written in assembly language using the PIC C Compiler. It is written in the text editor or notepad called as source code. It also can be written directly in the PIC C Compiler. Then the file saved is *file.c file. After the program is successfully compiled, the *file.hex file was generated. The hex file was tested by doing the simulation in the Proteus 7 Professional to see the output generated from the program. After got the correct output, the *file.hex file then was uploaded in the PIC16F877A using the PIC programmer. The process of implementing the microcontroller is shown in Figure 3.3. This microcontroller part is the first part that was implemented in hardware. Figure 3.3: The process of implementing the microcontroller Power Electronics Driver A driver is an electronic component used to control another circuit or other component, such as a high-power transistor. Unlike the bipolar transistor, which is current driven, IGBTs, with their insulated gates, are voltage driven. It is allows user to speed up or slow down the switching speeds according to the requirements of the application. The control circuitry supplied low current driving signals that are referenced to controller-ground. A logic one signal was applied to its gate with respect to its source to turn on an IGBT switch, and this signal needs to restrain sufficient power. These requirements can not be met by the control circuit. Figure 3.5 shows a diagram of how signals need to be applied to IGBT switches for effective operation. Figure 3.4: Control signals need to be applied to the gate with respect to the source The driver chose is IR2110 which is a dual driver. The IR2110 High Voltage Bridge Driver is a power integrated circuit that is designed to drive two insulated gate devices. The typical connection of the driver is shown in Figure 3.5. The two channels of the IR2110 are completely independent of one another. The HO output is controlled by the HIN input, and the LO output is controlled by the LIN input. The two inputs of the IR2110 are logically coupled to the shutdown (SD) pin through an AND gate. If HIN and LIN both go high, then the IR2110 will be shut down until one or both inputs go low. This measure helps prevent the catastrophic situation where both Q1 and Q2 turn on at the same time and short circuit the input source. [5] Figure 3.5: Typical connection of IR2110 High Voltage Bridge Driver Isolation using the optocoupler An optocoupler or sometimes refer to as optoisolator allows two circuits to exchange signals yet remain electrically isolated. This is usually accomplished by using light to relay the signal. The standard optocoupler circuits design uses a LED shining on a phototransistor. The signal is applied to the LED, which then shines on the transistor in the ic.   The optocoupler circuit is shown in Figure 3.6 below. In this project, the optocoupler is used as the source and destination are at very different voltage levels, where the source is the microprocessor which is operating from 5V DC but it being used to control the IGBTs which is switching at higher voltage. In such situations the link between the two must be an isolated one, to protect the microprocessor from overvoltage damage. The optocouplers can be used with following advantages for driving high side IGBT in any topology: They can be used to give a very high isolation voltage Signals from DC to several MHz can be handled by opto-couplers. They can be easily interfaced to Microcomputers or other controller ICs or any PWM IC. Figure 3.6: Optocoupler circuit The circuit of low side voltage which consists of PIC, driver and optocoupler was first constructed in the Proteus 7 Professional to see the output generated to be compared with the hardware results. The circuit is as in Figure 3.7 below. Figure 3.7: Low side voltage simulation Power Electronic Inverter The power electronics inverter part is the main part of the system. This is because this circuit will perform the conversion from DC to AC. The circuit consists of four IGBT that act as a switch, DC source and also the load. Figure 3.8 shows a diagram of the H-Bridge power electronics inverter stage. Figure 3.8: H-Bridge power electronics inverter stage. But for this project, the inverter circuit used is the 3-level H-bridge inverter circuit. The circuit was first constructed in the MATLAB as in Figure 3.9 and the simulation of the circuit was done to see the result of simulation. Figure 3.9: 3-level H-bridge inverter circuit constructed in MATLAB The block parameter for the IGBTs was set as in Figure 3.10. The switching frequency used for this circuit is 50Hz. So, the period of waveform can be calculated as below: Switching frequency, f = N / Pf Fundamental period, Pf = 1 / f fundamental = 1/ 50 = 0.02s Figue 3.10: The block parameter setting for the IGBTs In addition, the phase delay or switching times of the IGBTs were also set. Table 3.1 below shows the switching time of the IGBTs. After the simulation was success, the circuit of single 3-level H-bridge inverter was constructed. Table 3.1: The switching time of the IGBTs IGBTs Switching Time IGBT 1 and IGBT 3 10 ms (à Ã¢â€š ¬) IGBT 2 and IGBT 4 0 ms (0 à Ã¢â€š ¬) IGBT 5 and IGBT 7 7 ms (à Ã¢â€š ¬/7) IGBT 6 and IGBT 8 3 ms (à Ã¢â€š ¬/3) For the switch, IRGB10B60KDPBF IGBT was selected for this design. It is very important to choose the correct switches for the inverter circuit because the performance of the design is directly depends on this. This IGBT was chosen because it has ultra fast recovery diode along, it offered benchmark efficiency for motor control and excellent current sharing in parallel operation. In addition the IGBT was selected as they are able withstand the power rating of the inverter. Table 3.2 shows some of the features of the selected IGBT. Table 3.2: The features of IRGB10B60KDPBF IGBT Characteristics Value Drain to Source Voltage (Vds) 600V Drain Current (Id) 12A Rise Time 20ns Fall Time 23ns Short Circuit Capability 10ÃŽÂ ¼s Figure 3.4: 3-level H-bridge inverter circuit