Carbohydrate-electrolyte sports drinks- do they enhance athletic performance The WritePass Journal

Carbohydrate-electrolyte sports drinks- do they enhance athletic performance Introduction Carbohydrate-electrolyte sports drinks- do they enhance athletic performance Introduction  Aim of Sports Drinks  Types of Sports DrinksStudies on Carbohydrate-Electrolyte Sports DrinkConclusionReferences:Related Introduction All athletes, whether it be trained or untrained, should ingest fluids before, during and after training or competition in order to achieve optimal euhydration. Fluids are required to prevent dehydration (loss of 2% body weight) and excessive electrolyte loss which leads to impaired exercise performance, fatigue and physiologic function, with 3% dehydration increasing the risk of developing an exertional heat illness (e.g. heat cramps, exhaustion or heat stroke (Casa, 2000). Fluids also provide a carbohydrate source to prevent the depletion of the body’s stores (Maughan 1994) – thus the composition of fluids is crucial. The amount and rate of fluid replacement will depend on a variety of factors – individual athlete’s sweat rate; exercise duration; exercise intensity; environmental factors; acclimatization state and the sport dynamics for example opportunities to drink and access to fluids (Casa, 2000). The absorption of fluid into the body depends on the speed at which it is emptied from the stomach and the rate at which it is absorbed through the walls of the small intestine. The higher the level of fluid in the stomach, the more gastric emptying is encouraged.   Aim of Sports Drinks Sports drinks aim to provide a number of different functions including provision of substrate, prevention of dehydration, electrolyte replacement, pre-exercise hydration and post-exercise rehydration (Maughan, 1998). The functional characteristics of a sports drink can be manipulated by altering the different variables which include carbohydrate content: concentration and type; osmolality; electrolyte composition and concentration; flavouring components; and other active ingredients (Maughan, 1998). Composition of Sports Drinks The major components of sports drinks are carbohydrates and electrolytes. Evidence suggests that the only electrolyte that should be added to sports drinks is sodium (Maughan, 1994). Sodium does not have a direct impact on physical performance but has a number of essential functions including maintaining plasma osmolality (Below et al, 1995), encouraging voluntary fluid intake (Passe, 2001) and reducing urine output (Vrijens Rehrer, 1999). Present in small amounts, sodium helps to quicken the rate of gastric emptying and increases the rate of fluid absorption into the intestine. Sodium concentration in sweat and plasma are 10.0-70.0mEq/l and 135.0-148.0mEq/l respectively (Latzka Montain, 1999, Costill, 1984). Athletes have a sweat rate of around 1litre/hour during exercise which increases in higher temperatures (Brouns F Kovacs E). It is important to remember that sweat rates and sweat electrolyte content vary between each individual athlete (Sawka, 2007). Carbohydrates are the ma in energy source during exercise and are stored as glucose in the liver and muscles. Consuming sports drinks containing a carbohydrate source helps to maintain the body’s glycogen stores and prevent glucose levels from falling too low. However, high concentrations of carbohydrate in the drink slow the rate of gastric emptying (Merson el al, 2002).   Types of Sports Drinks There are three types of sports drinks, all of which contain various levels of fluid, carbohydrates and electrolytes (usually 10-25mmol/l of Sodium) – (i) Isotonic drinks contain fluid, electrolytes and 6 to 8% of a carbohydrate source. These empty from the stomach at a rate similar to water and quickly replace fluids lost by sweating and supply a boost of carbohydrate. Isotonic drinks are the drink of choice for most athletes for example in middle and long distance running and team sports. In the Position Stand by the American College of Sports Medicine Position 2007, isotonic drinks are recommended for events lasting longer than one hour .(ii) Hypotonic drinks contain fluid, electrolytes and a low level of carbohydrate and quickly replace fluids lost by sweating. This is suitable for athletes who need fluid without the boost of carbohydrate e.g. jockeys and gymnasts. A study by Bonneti and Hopkins 2010, found that the ingestion of a hypotonic drink enhanced performance simil ar to that of an isotonic drink, suggesting that hypotonic drinks may be the preferred option for endurance performance of longer than an hour. More evidence is needed to prove this, but it seems that water is absorbed into the intestine more rapidly when using a hypotonic drink over an isotonic drink ( Bonneti Hopkins 2010) (iii) Hypertonic drinks contain fluid and high levels of carbohydrate. They are used to supplement daily carbohydrate intake to meet energy demands, particularly in ultra distance events were high levels of energy are required. They need to be used in conjunction with isotonic drinks to replace fluids. Studies on Carbohydrate-Electrolyte Sports Drink In an area of on-going research, many studies have been conducted with carbohydrate-electrolyte sports drinks and their effects on performance. Table 1 summarises the effect of these drinks when compared with placebos. Studies lasting longer than one hour, with the addition of carbohydrate to the drink, have shown to increase performance (Coyle, 2004). Events lasting less than one hour have shown to have no need for carbohydrate electrolyte sports drinks (Bonen et al 1981, Powers et al 1990).   However, a study by Murray et al 1989, found that drinks containing 8-10% carbohydrate delayed fluid absorption and gastric emptying whilst drinks containing 6% carbohydrate solution enhanced exercise performance after 1 hour.   When comparing a 15% carbohydrate-electrolyte solution to a 2% carbohydrate-electrolyte solution in a hot climate, it is in fact the 2% solution that increased performance and prevented fatigue (Galloway Maughan). There has been numerous studies conducted with hig h carbohydrate content solutions (above 10 %,) but this amount of carbohydrate content should ideally be used in carbohydrate loading only and not when looking to increase performance. Conclusion There is clear evidence that drinks, containing an energy source in the form of a carbohydrate and an electrolyte, have beneficial effects for athletes and improve performance (Convertino et al, 1996; Casa 2000) provided exercise duration is long enough to allow empting of the drink from the stomach followed by absorption into the intestine (Shirreffs, 2003).   It is important to remember, that every individual is different, and what suits one person in a given situation may not suit another, therefore customized fluid replacement programmes are advised (Maughan 1993). References: Below PR, Mora-Rodriguez R, Gonzalez-Alonso J Coyle EF (1995) Fluid and carbohydrate ingestion independently improve performance during 1 h of intense exercise. Medicine and Science in Sports and Exercise 27, 200–210. Bonen A, Malcolm SA, Kilgour RD, MacIntyre KP Belcastro AN (1981) Glucose ingestion before and during intense exercise. Journal of Applied Physiology 50, 766-71. Bonetti DL Hopkins WG (2010) Effect of Hypotonic and Isotonic Sports Drinks on Endurance Performance and Physiology. Sportscience 14, 63-70. Brouns F Kovacs E (1997) Functional drinks for athletes. Trends in Food Science Technology 8, 414-420. Cade R, Spooner G, Schlein CA, Pickering M Dean R (1988) Effect of fluid, electrolyte, and glucose replacement during exercise on performance, body temperature, rate of sweat loss, and compositional changes of extracellular fluid. Journal of Sports Medicine 12, 150-6. Casa DJ (2000) National athletic trainer’s association position statement: fluid replacement for athletes. Journal of Athletic Training 35, 212-224. Converertino V, Armstrong L, Coyle E, Mack G, Sawka M, Senay L Sherman W (1996) American college of sports medicine position stand: exercise and fluid replacement. Medicine and Science in Sports and Exercise 28, I-vii. Costill DL (1984) Sweating: its composition ad effects on body fluids. Annals of the New York Academy of Science 301, 160-174. Coyle EF (2004) Fluid and Fuel Intake during exercise. Journal of Sports Science 22, 39-55. Davis JM, Lamb DR, Pate RR, Slentz CA, Burgess WA Bartoli WP (1988) Carbohydrate-electrolyte drinks: effects on endurance cycling in the heat. American Journal of Clinical Nutrition 48, 1023-30. Galloway SDR Maughan The effects of substrate and fluid provision on ermoregulatory and metabolic responses to prolonged exercise in a hot environment. Journal of Sports Science 18, 339-351. Latzka WA Montain SJ (1999) Water and electrolyte requirements for exercise. Clinics in sports medicine 18, 513-524. Maughan RJ (1993) Fluid replacement in sport and exercise – a consensus statement. British Journal of Sports Medicine 27, 34. Maughan RJ (1994) Fluid and electrolyte loss and replacement in exercise. In Oxford Textbook of Sports Medicine, pp82-93 [M Harries, C Williams, WD stanish LL Micheli editors]. Oxford: Oxford university press. Maughan RJ (1998) The sports drink as a functional food: formulations for successful performance. Proceedings of the Nutrition Society 57, 15-23 Merson SJ, Shirreffs SM, Leiper JB, Maughan RJ (2002) Changes in blood, plasma and red cell volume after ingestion of hypotonic and hypertonic solutions. Proceedings of the Nutrition Society. Millard-Stafford M, Rosskopf   LB, Snow TK Hinson BT (1997)Water versus carbohydrate-electrolyte   ingestion before and during a 15-km run in the heat. International Journal of Sports Nutrition 7, 26-38. Murray R, Seifert JG, Eddy DE, Paul GL Halaby GA (1989) Carbohydrate feeding and exercise: effect of beverage carbohydrate content. European Journal of Applied Physiology 59, 152. Passe DH (2001) Physiological and psychological determinants of fluid intake. In Sports Drinks: Basic Science and Practical Aspects, pp45–87 [RJ Maughan, R Murray editors]. Boca Raton, Florida: CRC Press. Powers SK, Lawler J, Dodd S, Tulley R, Landry G Wheeler K (1990) Fluid replacement drinks during high intensity exercise: effects on minimising exercise-induced disturbances. European Journal of Applied Physiology 60, 54-60 Sawka MN (2007) Position Stand: Exercise and Fluid replacement. American College of Sports Medicine, 377- 390. Shirreffs SM (2003) The Optimal Sports Drink. Schweizerische Zeitschrift fur Sportmedizin und Sporttraumatologie 51, 25-29. Tsintzas K, Liu R, Williams C (1993) The effect of carbohydrate ingestion on performance during a 30-km race. International Journal of Sports Medicine 3 127-39. Vrijens DM, Rehrer NJ (1999) Sodium-free fluid ingestion decreases plasma sodium during exercise in the heat. Journal Applied Physiology 86,   1847–1851.

5 Cases for Requiring a Comma Before a Sentence Tag

5 Cases for Requiring a Comma Before a Sentence Tag 5 Cases for Requiring a Comma Before a Sentence Tag 5 Cases for Requiring a Comma Before a Sentence Tag By Mark Nichol A sentence tag is a word or phrase added to the beginning or end of a statement for emphasis or to provide more information. For the following sentences, I discuss the necessity of preceding end-of-sentence tags with a comma. 1. â€Å"I shouldn’t have been surprised really.† Without a comma separating really from the rest of the sentence, the implication is that really is an adverb modifying how the writer should not have been surprised (really, as in factually, and the opposite of allegedly). However, its function is merely to emphasize the point: â€Å"I shouldn’t have been surprised, really.† 2. â€Å"I was in the other room at the time actually.† This sentence indicates that the writer was in the other room in an actual manner, rather than figuratively, but that’s not the literal meaning. The writer has been challenged about his or her location when an incident occurred, and the intent, again, is to emphasize. A comma is required before actually to signal this distinction: â€Å"I was in the other room at the time, actually.† The idea could also be conveyed with actually inserted elsewhere in the sentence (in descending order of elegance): â€Å"Actually, I was in the other room at the time† or â€Å"I was, actually, in the other room at the time† or â€Å"I was in the other room, actually, at the time.† (Note that not all adverbial tags are so flexible about location; try these variations in the first example, and you’ll see that really seems to feel right only as a concluding tag.) 3. â€Å"We did it all right.† This sentence implies that the writer is evaluating a merely competent performance. With a comma inserted before â€Å"all right,† the implication is of emphasis on the fact of the accomplishment: â€Å"We did it, all right.† 4. â€Å"They offered a free pass to boot.† Without a comma preceding â€Å"to boot† (which means â€Å"as a bonus†), the phrase appears to describe an action that is, thanks to the pass, complimentary. The comma signals that â€Å"to boot† is an appendage that idiomatically offers additional information: â€Å"They offered a free pass, to boot.† 5. â€Å"Geology has an impact on biology and vice versa.† As written, this sentence seems to equate biology and vice versa as two things geology has an impact on. But â€Å"vice versa,† meaning â€Å"the opposite,† applies to the entire sentence preceding it, so it must be set off from the sentence: â€Å"Geology has an impact on biology, and vice versa.† Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Punctuation category, check our popular posts, or choose a related post below:30 Synonyms for â€Å"Meeting†Ã¢â‚¬Å"As Well As† Does Not Mean â€Å"And†Supervise vs. Monitor

5 Cases for Requiring a Comma Before a Sentence Tag

5 Cases for Requiring a Comma Before a Sentence Tag 5 Cases for Requiring a Comma Before a Sentence Tag 5 Cases for Requiring a Comma Before a Sentence Tag By Mark Nichol A sentence tag is a word or phrase added to the beginning or end of a statement for emphasis or to provide more information. For the following sentences, I discuss the necessity of preceding end-of-sentence tags with a comma. 1. â€Å"I shouldn’t have been surprised really.† Without a comma separating really from the rest of the sentence, the implication is that really is an adverb modifying how the writer should not have been surprised (really, as in factually, and the opposite of allegedly). However, its function is merely to emphasize the point: â€Å"I shouldn’t have been surprised, really.† 2. â€Å"I was in the other room at the time actually.† This sentence indicates that the writer was in the other room in an actual manner, rather than figuratively, but that’s not the literal meaning. The writer has been challenged about his or her location when an incident occurred, and the intent, again, is to emphasize. A comma is required before actually to signal this distinction: â€Å"I was in the other room at the time, actually.† The idea could also be conveyed with actually inserted elsewhere in the sentence (in descending order of elegance): â€Å"Actually, I was in the other room at the time† or â€Å"I was, actually, in the other room at the time† or â€Å"I was in the other room, actually, at the time.† (Note that not all adverbial tags are so flexible about location; try these variations in the first example, and you’ll see that really seems to feel right only as a concluding tag.) 3. â€Å"We did it all right.† This sentence implies that the writer is evaluating a merely competent performance. With a comma inserted before â€Å"all right,† the implication is of emphasis on the fact of the accomplishment: â€Å"We did it, all right.† 4. â€Å"They offered a free pass to boot.† Without a comma preceding â€Å"to boot† (which means â€Å"as a bonus†), the phrase appears to describe an action that is, thanks to the pass, complimentary. The comma signals that â€Å"to boot† is an appendage that idiomatically offers additional information: â€Å"They offered a free pass, to boot.† 5. â€Å"Geology has an impact on biology and vice versa.† As written, this sentence seems to equate biology and vice versa as two things geology has an impact on. But â€Å"vice versa,† meaning â€Å"the opposite,† applies to the entire sentence preceding it, so it must be set off from the sentence: â€Å"Geology has an impact on biology, and vice versa.† Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Punctuation category, check our popular posts, or choose a related post below:30 Synonyms for â€Å"Meeting†Ã¢â‚¬Å"As Well As† Does Not Mean â€Å"And†Supervise vs. Monitor

Michael Jackson concert review Essay Example | Topics and Well Written Essays - 1000 words

Michael Jackson concert review - Essay Example Even before the actual performance began, and just the name of Michael Jackson passed across the projector screen, the crowd was already cheering on and celebrating. It is important to note and mention that their ecstasy and joy was excusable because in 1987, no other person in the world had reached the legendary status and position of Michael Jackson in entertainment (OConnor et al 843). The stage arrangement and background details or props were accurate to convey the mood of that particular point in time. The lighting was proper, because the flash lights coincided with the drops of the breakdance put forth by Michael Jackson and his band of performers. In all aspects and fairness, it is safe to assert that the venue was too small for the legendary stature of Michael Jackson. Preferably a soccer stadium could have served well since the status of Michael Jackson was too legendary to be confined to the auditorium. In a way, the band sounded too loud for the venue because the venue was small and stuffed by fans and revelers. Therefore a bigger venue such as a stadium would have allowed the band as a whole to sing and perform by feeding off their musical energy to the revelers and fans. In terms of the set list or the play list, it is proper to mention that it was accurately on point. The songs were arranged in order of their popularity and likeness. The show starter however was a popular song so as to get the audience and the revelers to the performances’’ mood and tune. The performance and show was began by â€Å"Wanna be Starting Something†- which is a blazer and a crowd puller. The first song got the mood of the night and the performance by exciting the audience and the revelers. The preceding songs grew to more energetic and involving songs that the audience could sing along to with ease. My favorite song for the performance stands out to be

Increase Safety in Retail Parking Lots Essay Example | Topics and Well Written Essays - 1000 words

Increase Safety in Retail Parking Lots - Essay Example Retail parking lots are a common place to be attacked by criminal because most customers are holding a lot of cash for shopping. The muggers see these shoppers as easy targets (Sennewald & Christman 2008). As a matter of fact, statistics show that police have reported to a high number of theft incidences from large retail companies. The company is obligated to return the favor of ensuring safety. Moreover, securing the parking lots next to our retail businesses would also increase our customer base since people love to shop in a place where they feel that they are secure and do not run the risk of being mugged. The main aim that the store is concerned about the customer being save in the [parking lot is to have a clear conscience. This is because if anything happens to the customers when they are within out parking lots, they we are guilty if we failed to do something that could have kept them save. Moreover, since we also work at the store, we also run the risk of being mugged or kidnapped. In order to have a clear conscience and also feel comfortable working at the store, it is our job to put all measures in place to ensure that our parking lot is safe (Vellani 2007). Although it is not possible for the company to prevent any misfortunes from befalling its customers, it is possible to take the necessary precautions for minimizing the chances of this happening by making sure that they are safe inside and outside the store. Keeping the client safe within and outside the stores is the right thing that any company can do. Most of our stores are found in unsecure neighborhood. This does not h owever mean that the customers need to feel insecure. Parking lots are the most areas prone to being attacked by mugger because they are usually deserted and the presence of many cars provides a perfect hide out for criminals. This implies that if the security within the retail stores were beefed up, then the insecurity in the

Ecommerce in Bangladesh Essay Example for Free

Ecommerce in Bangladesh Essay 1. Introduction When Electronic commerce, commonly known as ecommerce, is the buying and selling of products or services over electronic systems such as the Internet and other computer networks. Electronic commerce draws on such technologies as electronic funds transfer, supply chain management, Internet marketing, online transaction processing, electronic data interchange (EDI), inventory management systems, and automated data collection systems. Modern electronic commerce typically uses the at least at one point in the transactions life-cycle, although it may encompass a wider range of technologies such as email, mobile devices and telephones as well. Electronic commerce is generally considered to be the sales aspect of ebusiness [1]. It also consists of the exchange of data to facilitate the financing and payment aspects of business transactions. E-commerce can be divided into: i. E-tailing or virtual storefronts on Web sites with online catalogs, sometimes gathered into a virtual mall ii. The gathering and use of demographic data through Web contacts iii. Electronic Data Interchange (EDI), the business-tobusiness exchange of data iv. E-mail and fax and their use as media for reaching prospects and established customers (for example, with newsletters) v. Business-to-business buying and selling vi. The security of business transactions The main areas of e-commerce are following: i. Business to Business (B2B) ii. Business to Consumer (B2C) iii. Business to Government (B2G) iv. Government to Business (G2B) 2. Objectives Our objectives are following: i. To define e-commerce and describe how it differs from ebusiness. ii. To identify and describe the unique features of ecommerce technology and discuss their business significance. iii. To describe the major types of e-commerce. iv. To discuss the origins and growth of e-commerce. v. To explain the evolution of e-commerce from its early years to today. vi. To identify the factors that will define the future of ecommerce. vii. To describe the major themes underlying the study of ecommerce. viii. To identify the major academic disciplines contributing to e-commerce and understand design of an e-commerce engine ix. To identify the opportunity and problem of e-commerce implementation in Bangladesh. x. To identify the future of e-commerce. Volume 2 Issue 2, February 2013 www.ijsr.net 150 International Journal of Science and Research (IJSR), India Online ISSN: 2319-7064 3. E-Commerce in Bangladesh In Bangladesh there is a limited application and use of B2C e-commerce .This field is not yet much developed in Bangladesh. There are many reasons behind it one simple reason this country is not so developed and most of its citizens are poor and uneducated. It is quit natural that there are few customers who is willing and can shop in internet. It will take years to be developed this sector in bd. The telecommunication infrastructure any country affect the Internet services directly, cause it is largely depended on it. In this chapter Define Need for e-commerce in Bangladesh, different sector in Bangladesh, overview of implementation stage of e-commerce in Bangladesh. And there is some problem such as: low internet speed, no payment gateway and internet range, and recommendation. 3.1 Need for E-commerce in Bangladesh With the increasing diffusion of ICTs, more specifically t he Internet, the global business community is rapidly moving towards Business-to-Business (B2B) e-commerce. The buyers/ importers gain a clear advantage when the Internet gives them access to the global market, by which they can compare prices across regions, find out whether prices vary by order fragmentation, get awareness about substitute/ alternative products. Consequently, the sellers/ exporters make sure that they are well portrayed in the cyber world through websites and portals. Like buyers, sellers also benefit from increased and more efficient access to the global market through the Internet. Bangladesh is pursuing an economic policy of export-led growth. With the rising forces of globalization, it is becoming increasingly important that the private sector, particularly the export sectors are well prepared to meet the requirements and expectations of the importers and also stand out in the competition against exporters in other countries. In such a scenario, two issues are becoming particularly important for Bangladeshi export sectors –one, whether businesses are automating their internal processes with these of ICTs to become increasingly efficient and competitive in a global context, and two, whether businesses have effective presence and participation in the cyber world. International organizations such as UNCTAD (United Nations Center for Trade and Development) and WTO (World Trade Organization) [2] have, over the last several years, put much emphasis on the importance of e-commerce for developing countries. UNCTAD has special programs to facilitate developing countries to transition into e-commerce. The WTO has also develo ped rules and guidelines for global e-commerce transactions. 3.2 E-commerce in Different Sector in Bangladesh Despite being a under developed country, selected segments of the Bangladeshi business community has embraced technology with reasonable success. Personal computers and the Internet are also emerging as day-to-day business tools. These positive indicators are favoring the prospects of e-commerce in Bangladesh. i. RMG Sector ii. Banking on the Web (Online Banking) iii. Online Shopping iv. Web Hosting, Domain v. Online cards, gifts vi. Pay Bill 3.3 The Existing Situation and Potential of E-commerce in Bangladesh Internet services are presently available in Bangladesh. Its usage for e-commerce by the Bangladeshi producers to export as well as to access inputs will be dependent on their willingness and ability to use this medium as well as that of the buyers of final products and the sellers of intermediate goods and services. Figure 1 depicts the three dimensions of e-commerce. Business to-Consumers (B2C) e-commerce is practically non-existent within Bangladesh, while a very limited level of Business-to-Business (B2B) and Businessto-Government (B2G) transactions exists [3]. The potential for use of e-commerce by Bangladeshi consumers and businesses with foreign firms is much brighter, and can play an important role in boosting the country’s exports. A significant volume of B2G is also possible, as the government remains the biggest spender. Figure 1. The Three Dimensions of E-commerce 3.4 E-commerce growth in Bangladesh E-commerce growth in Bangladesh shown in figure 3.2 in the year of 2000 e-commerce business is 11440 million taka. In the years of 2001 business of e-commerce is 15840 million taka and increase year by year 2002 business is 18980 million taka 2002 to 2004 businesses is not very fast but in the year of 2005 business of e-commerce is 22480 and end the year of 2006 business of e-commerce growth is 252000 million taka. Figure 2. E-commerce growth in Bangladesh 4. Methodologies The methodologies of our survey are given below: 4.1 Identification of scope of study 151 Volume 2 Issue 2, February 2013 www.ijsr.net International Journal of Science and Research (IJSR), India Online ISSN: 2319-7064 To accomplish the project objectives, a systematic process is followed. The project process begins with the identification of the project topic where studies was carried out to obtain enough information on the topic. 4.2 Group discussions to collect suggestions on the survey of e-commerce system Discuss with group member about the topic and collect their suggestions on this topic. Also discuss impacts of ecommerce in our society and business and barriers ecommerce in different sectors in Bangladesh and the future of e-commerce system. 4.3 E-commerce site visits as clients Some e-commerce websites visits were made as clients. We visited websites like www.ebay.com, browsed many products, added product to shopping cart, created user account and observed the check out process. We also examined their user interface, front end design and various category of product. We searched products by different types, t he product names and the company name. 4.4 Internet search to collect data on e-commerce growth world wide We searched the internet to collect data on e-commerce business growth based on time, data on e-commerce revenue based on geographic locations. We also collected data about e-commerce business growth and present situation of ecommerce in Bangladesh. 4.5 Architecture and code review of e-commerce site We reviewed the main technologies involved in ecommerce site, which include php sessions, catalog technology, server technology (hardware and software). We also reviewed credit card transaction and shopping cart checkout process. 4.6 Interviews to find what people think about ecommerce We interviewed people from various sections of the society to find out what they think about e-commerce and what changes they needed. We also discussed with them what the advantages and disadvantages of e-commerce systems are. 4.7 Introducing intentional change to understand ecommerce engine We downloaded e-commerce site code and changed the catalog of product, banner, product detail, product image, and increase and decrease number of product show in the main page also changed the theme of e-commerce site. We entered new products and removed selling product and updated the products. 5.1 Architecture This is the design of front-end design shown in Figure 3. There is a one home page, wish list, acco unt, shopping cart, and product list and checkout option. Figure 3. E-commerce site front end design 5.2 Database Structure 5.2.1 E-R Diagram A sample entity–relationship diagram using Chens notation is shown in Figure 4. 5. Technical Design of E-Commerce Site The technical design of e-commerce site include database structure, database schema, table structure, php session, shopping cart, e-r diagram, and credit card transaction. Figure 4. A sample entity–relationship diagram using Chens notation In software engineering, an entity–relationship model (ER model for short) is an abstract [4] and conceptual representation of data. Entity–relationship modeling is a database modeling method, used to produce a type of conceptual schema or semantic data model of a system, often 152 Volume 2 Issue 2, February 2013 www.ijsr.net International Journal of Science and Research (IJSR), India Online ISSN: 2319-7064 a relational database, and its requirements in a top-down fashion. Diagrams created by this process are called entity– relationship diagrams or ER diagrams. Using the three schema approach to software engineering, there are three levels of ER models that may be developed. The conceptual data model is the highest level ER model in that it contains the least granular detail but establishes the overall scope of what is to be included within the model set. The conceptual ER model normally defines master reference data entities that are commonly used by the organization. Developing an enterprise-wide conceptual ER model is useful to support documenting the data architecture for an organization. A conceptual ER model may be used as the foundation for one or more logical data models. The purpose of the conceptual ER model is then to establish structural metadata commonality for the master data entities between the set of logical ER models. The conceptual data model may be used to form commonality relationships between ER models as a basis for data m odel integration. A logical ER model does not require a conceptual ER model especially if the scope of the logical ER model is to develop a single disparate information system. The logical ER model contains more detail than the conceptual ER model. In addition to master data entities, operational and transactional data entities are now defined [5]. The details of each data entity are developed and the entity relationships between these data entities are established. The logical ER model is however developed independent of technology into which it will be implemented. One or more physical ER models may be developed from each logical ER model. The physical ER model is normally developed be instantiated as a database. Therefore, each physical ER model must contain enough detail to produce a database and each physical ER model is technology dependent since each database management system is somewhat different. The physical model is normally forward engineered to instantiate the structur al metadata into a database management system as relational database objects such as database tables, database indexes such as unique key indexes, and database constraints such as a foreign key constraint or a commonality constraint. The ER model is also normally used to design modifications to the relational database objects and to maintain the structural metadata of the database. The first stage of information system design uses these models during the requirements analysis to describe information needs or the type of information that is to be stored in a database. The data modeling technique can be used to describe any ontology (i.e. an overview and classifications of used terms and their relationships) for a certain area of interest. In the case of the design of an information system that is based on a database, the conceptual data model is, at a later stage (usually called logical design), mapped to a logical data model, such as the relational model; this in turn is mapped to a physical model during physical design. 5.2.2 The Building Blocks: Entities, Relationships, and Attributes The building blocks: entities, relationships, and attributes as shown in Figure 5, first here two related entities then an entity with an attribute next in this figure a relationship with and attribute and finally see primary key. Figure 5. The building blocks: entities, relationships, and attributes An entity may be defined as a thing which is recognized as being capable of an independent existence and which can be uniquely identified. An entity is an abstraction from the complexities of some domain. When we speak of an entity we normally speak of some aspect of the real world which can be distinguished from other aspects of the real world. An entity may be a physical object such as a house or a car, an event such as a house sale or a car service, or a concept such as a customer transaction or order. Although the term entity is the one most commonly used, following Chen we should really distinguish between an entity and an entity-type. An entity-type is a category. An entity, strictly speaking, is an instance of a given entity-type. There are usually many instances of an entity-type. Because the term entity-type is somewhat cumbersome, most people tend to use the term entity as a synonym for this term. Entiti es can be thought of as nouns. Examples: a computer, an employee, a song, a mathematical theorem. A relationship captures how entities are related to one another. Relationships can be thought of as verbs, linking two or more nouns. Examples: owns relationship between a company and a computer, supervises relationship between an employee and a department [6], performs relationship between an artist and a song, a proved relationship between a mathematician and a theorem. The models linguistic aspect described above is utilized in Volume 2 Issue 2, February 2013 www.ijsr.net 153 International Journal of Science and Research (IJSR), India Online ISSN: 2319-7064 the declarative database query language ERROL, which mimics natural language, constructs. ERROLs semantics and implementation are based on Reshaped relational algebra (RRA), a relational algebra which is adapted to the entity–relationship model and captures its linguistic aspect. Entities and relationships can both have attributes. Examples: an employee entity might have a Social Security Number (SSN) attribute; the proved relationship may have a date attribute. Every entity (unless it is a weak entity) must have a minimal set of uniquely identifying attributes, which is called the entitys primary key. Entity–relationship diagrams dont show single entities or single instances of relations. Rather, they show entity sets and relationship sets. Example: a particular song is an entity. The collection of all songs in a database is an entity set. The eaten relationship between a child and her l unch is a single relationship. The set of all such child-lunch relationships in a database is a relationship set. In other words, a relationship set corresponds to a relation in mathematics, while a relationship corresponds to a member of the relation. 5.2.3Relationships, Roles and Cardinalities In Chens original paper he gives an example of a relationship and its roles. He describes a relationship marriage and its two roles husband and wife. A person plays the role of husband in a marriage (relationship) and another person plays the role of wife in the (same) marriage. These words are nouns. That is no surprise; naming things requires a noun. However as is quite usual with new ideas, many eagerly appropriated the new terminology but then applied it to their own old ideas. Thus the lines, arrows and crows-feet of their diagrams owed more to the earlier Bachman diagrams than to Chens relationship diamonds. And they similarly misunderstood other important concepts. In particular, it b ecame fashionable (now almost to the point of exclusivity) to name relationships and roles as verbs or phrases. 5.2.4 Limitations ER models assume information content that can readily be represented in a relational database. They describe only a relational structure for this information. Hence, they are inadequate for systems in which the information cannot readily be represented in relational form, such as with semistructured data. Furthermore, for many systems, the possible changes to the information contained are nontrivial and important enough to warrant explicit specification. Some authors have extended ER modeling with constructs to represent change, an approach supported by the original author; an example is Anchor Modeling. An alternative is to model change separately, using a process modeling technique. Additional techniques can be used for other aspects of systems. For instance, ER models roughly Figure 6. E-R modeling 5.3 Table Structure In relational databases and flat file databases, a table is a set of data elements (values) that is organized using a model of vertical columns (which are identified by their name) and horizontal rows, the cell being the unit where a row and column intersect. A table has a specified number of columns, but can have any number of rows each row is identified by the values appearing in a particular column subset which has been identified as a unique key index. Table is another term for relations; although there is the difference in that a table is usually a multi-set (bag) of rows whereas a relation is a set and does not allow duplicates. Besides the actual data rows, tables generally have associated with them some meta-information, such as constraints on the table or on the values within particular columns. The data in a table does not have to be physically stored in the database. Views are also relational tables, but 154 correspond to just 1 of the 14 different modeling techniques offered by UML. Another limitation: ER modeling is aimed at specifying information from scratch. This suits the design of new, standalone information systems, but is of less help in integrating pre-existing information sources that already define their own data representations in detail. Even where it is suitable in principle, ER modeling is rarely used as a separate activity. One reason for this is todays abundance of tools to support diagramming and other design support directly on relational database management systems. These tools can readily extract database diagrams that are very close to ER diagrams from existing databases, and they provide alternative views on the information contained in such diagrams. In a survey, Brodie [7] and Liu could not find a single instance of entity–relationship modeling inside a sample of ten Fortune 100 companies. Badia and Lemire blame this lack of use on the lack of guidance but also on the lack of benefits, such as lack of support for data integration. Also, the enhanced entity–relationship model (EER modeling) introduces several concepts which are not present in ER modeling. ER modeling as shown in Figure 6. Volume 2 Issue 2, February 2013 www.ijsr.net International Journal of Science and Research (IJSR), India Online ISSN: 2319-7064 their data are calculated at query time. Another example is nicknames, which represent a pointer to a table in another database. 5.4 Database Schema A database schema of a database system is its structure described in a formal language supported by the database management system (DBMS) and refers to the organization of data to create a blueprint of how a database will be constructed (divided into database tables). The formal definition of database schema is a set of formulas (sentences) called integrity constraints imposed on a database. These integrity constraints ensure compatibility between parts of the schema. All constraints are expressible in the same language. A database can be considered a structure in realization of the database language. The states of a created conceptual schema are transformed into an explicit mapping, the database schema. This describes how real world entities are modeled i n the database. A database schema specifies, based on the database administrators knowledge of possible applications, the facts that can enter the database, or those of interest to the possible end-users. The notion of a database schema plays the same role as the notion of theory in predicate calculus. A model of this â€Å"theory† closely corresponds to a database, which can be seen at any instant of time as a mathematical object. Thus a schema can contain formulas representing integrity constraints specifically for an application and the constraints specifically for a type of database, all expressed in the same database language. In a relational database [8], the schema defines the tables, fields, relationships, views, indexes, packages, procedures, functions, queues, triggers, types, sequences, materialized views, synonyms, database links, directories, Java, XML schemas, and other elements. Schemas are generally stored in a data dictionary. Although a schema is defined in text database language, the term is often used to refer to a graphical depiction of the database structure. In other words, schema is the structure of the database that defines the objects in the database. In an Oracle Database system, the term schema has a slightly different connotation. For the interpretation used in an Oracle Database, see schema object. 5.5 Levels of Database Schema A conceptual schema or conceptual data model is a map of concepts and their relationships. This describes the semantics of an organization and represents a series of assertions about its nature. Specifically, it describes the things of significance to an organization (entity classes), about which it is inclined to collect information, and characteristics of (attributes) and associations between pairs of those things of significance (relationships). Figure 7. Conceptual schema or conceptual data model A logical schema is an alias that allows a unique name to be given to all the physical schemas containing the same data store structures. The aim of the logical schema is to ensure the portability of the procedures and models on the different physical schemas. In this way, all developments in Designer are carried out exclusively on logical schemas. A logical schema can have one or more physical implementations on separate physical schemas, but they must be based on data servers of the same technology. A logical schema is always directly linked to a technology. To be usable, a logical schema must be declared in a context. Declaring a logical schema in a context consists of indicating which physical schema corresponds to the alias logical schema for this context. For example: The logical schema LEDGER is the set of Sybase tables required for the functioning of the accounting application. These tables are stored in a physical schema for each installation of the accounting application. Work in Designer or Operator is always done on the logical schema LEDGER. Only the context allows the physical schema on which the operations are actually done to be determined. Thus, the user can switch from one physical environment to another in a single action. A logical schema’s example is shown in figure 8. Table 1: Name of the logical schema Name of the logical schema LEDGER LEDGER LEDGER Context Boston Seattle Production Seattle Test Physical Schema Sybase Boston LDG Sybase SEATTLE PROD LDG Sybase SEATTLE TEST LDG Volume 2 Issue 2, February 2013 www.ijsr.net 155 International Journal of Science and Research (IJSR), India Online ISSN: 2319-7064 This article discusses the Oracle use of the term. For other uses of schema in a database context, such as a graphical representation of tables and other objects in a database, see database schema. In an Oracle database, associated with each database user is a schema. A schema comprises a collection of schema objects. Examples of schema objects include: tables, views, sequences, synonyms, indexes, clusters, database links, snapshots, procedures, functions and packages. Figure 8. Logical schemas Physical schema is a term used in data management to describe how data is to be represented and stored (files, indices, et al.) in secondary storage using a particular database management system (DBMS) (e.g., Oracle RDBMS, Sybase SQL Server, etc.). The logical schema was the way data were represented to conform to the constraints of a particular approach to database management. At that time the choices were hierarchical and network. Describing the logical schema, however, still did not describe how physically data would be stored on disk drives. That is the domain of the physical schema. Now logical schemas describe data in terms of relational tables and columns, object-oriented classes, and XML tags. A single set of tables, for example, can be implemented in numerous ways, up to and including an architecture where table rows are maintained on computers in different countries. Figure 10. Schema objects 5.6 Php Sessions A PHP session variable is used to store information about, or change settings for a user session. Session variables hold information about one single user, and are available to all pages in one application [9]. When you are working with an application, you open it, do some changes and then you close it. This is much like a Session. The computer knows who you are. It knows when you start the application and when you end. But on the internet there is one problem: the web server does not know who you are and what you do because the HTTP address doesnt maintain state. A PHP session solves this problem by allowing you to store user information on the server for later use (i.e. username, shopping items, etc). However, session information is temporary and will be deleted after the user has left the website. If you need a permanent storage you may want to store the data in a database. Sessions work by creating a unique id (UID) for each visitor and store variables based on this UID. The UID is either stored in a cookie or is propagated in the URL. In PHP, sessions can keep track of authenticated in users. They are an essential building block in todays websites with big communities and a lot of user activity. Without sessions, everyone would be an anonymous visitor. In system terms, PHP sessions are little files, stored on the servers disk. But on high traffic sites, the disk I/O involved, and not being able to share sessions between multiple web servers make this default system far from ideal. This is how to enhance PHP session managem ent in terms of performance and share ability. If you have multiple web servers all serving the same site, sessions should be shared among those servers, and not 156 Figure 9. Physical schema In Database lore, a schema object is a logical data storage structure. This possibly originates from the use of the term in the context of Oracle databases. The term schema can have other meanings when talking about non-Oracle databases. Volume 2 Issue 2, February 2013 www.ijsr.net International Journal of Science and Research (IJSR), India Online ISSN: 2319-7064 reside on each servers individual disk. Because once a user gets load-balanced to a different server, the session cannot be found, effectively logging the user out. A common way around this is to use custom session handlers. 5.7 Shopping Card A shopping cart is a software application that typically runs on the computer where your Web site is located (the Web server), and allows your customers to do things such as searching for a product in your store catalog, adding a selected product to a basket, and placing an order for it. The shopping cart integrates with the rest of your Web site. In other words, there are typically links on your Web pages that customers can click on, and which allow them to perform some of the functions described above. For example, many e-commerce Web sites have a search link appearing on every Web page, as part of the navigation area Shopping carts are written in a variety of different programming languages. Some of them provide full access to the source code, thus allowing experienced programmers to make modifications to the system features, some others dont. Some shopping carts run on Windows Web servers, some on Unix, others on both. In most cases, you can place the shopping cart on your Web server simply by transferring its files there using any FTP [10] software, where FTP stands for File Transfer Protocol. For example, our shopping cart software called Product Card is a collection of files written in a programming language called Classic ASP, and that you host on a Windows server. Experienced programmers can customize the system as they wish as the source code is included. iii. Merchant runs credit card through the point of sale unit. The amount of the sale is either hand-entered or transmitted by the cash register. iv. Merchant transmits the credit card data and sales amount with a request for authorization of the sale to their acquiring bank. . v. The acquiring bank that processes the transaction, routes the authorization request to the card-issuing bank. The credit card number identifies type of card, issuing bank, and the cardholders account. vi. If the cardholder has enough credit in their account to cover the sale, the issuing bank authorizes the transaction and generates an authorization code. This code is sent back to the acquiring bank. vii. The acquiring bank processing the transaction, and then sends the approval or denial code to the merchants point of sale unit. Each point of sale device has a separate terminal ID for credit card processors to be able to route data back to that particular unit. viii. A sale draft, or slip, is printed out by the point of sale unit or cash register. The merchant asks the buyer to sign the sale draft, which obligates them to reimburse the cardissuing bank for the amount of the sale. ix. At a later time, probably that night when the store is closing up, the merchant reviews all the auth orizations stored in the point of sale unit against the signed sales drafts. When all the credit card authorizations have been verified to match the actual sales drafts, the merchant will capture, or transmit, the data on each authorized credit card transaction to the acquiring bank for deposit. This is in lieu of depositing the actual signed paper drafts with the bank. x. The acquiring bank performs what is called an interchange for each sales draft, with the appropriate card-issuing bank. The card-issuing bank transfers the amount of the sales draft, minus an interchange fee to the acquiring bank. xi. The acquiring bank then deposits the amount of the all the sales drafts submitted by the merchant, less a discount fee, into the merchants bank account. Credit card transaction is shown in Figure 12. Figure 11. Google Checkout shopping cart 5.8 Credit Card Transaction From the information presented in the preceding sections, we can start to piece together what is occurring during a credit card transaction. We know that merchants have a relationship with either an acquiring bank or independent sales organization, through which they have their credit card transactions processed. The section on industry terminology shows us some of the fees involved in this process. Merchants must pay the acquiring bank or ISO a discount fee based on the total amount of the sale. Likewise, the acquiring bank or ISO must pay the card issuer an interchange fee when they process the sales draft from the merchant. Steps involved in a normal credit card transaction: i. Merchant calculates the amount of purchase and asks buyer for payment ii. Buyer presents merchant with a credit card. Figure 12. Credit card transaction 6. Conclusion Electronic commerce or e-commerce is a term for any type of business, or commercial transaction that involves the transfer of information across the Internet. It is currently one of the most important aspects of the Internet to emerge. E157 Volume 2 Issue 2, February 2013 www.ijsr.net International Journal of Science and Research (IJSR), India Online ISSN: 2319-7064 commerce has grown tremendously worldwide. In the future e-commerce may become totally mobile based. In Bangladesh E-commerce also become a very powerful business mechanism but Bangladesh will have to overcome the problems with poor network connectivity and electronic payment issues. The problems identified in this Project are: Security problem, Confusing checkout process, Customers can’t find products, Customers can’t touch and fell a product, No sales staff means any chance of up-selling, Language barrier. Regarding the identified problems the following solutions have been proposed: Merchant needs to ensure the platform employs strong encryption for payment processing and customer data retention. E-commerce platform should always have a visible running total of purchases prominently displayed during the customer experience. E-commerce platform must support the ability to present the customer with nested categories as well as a search box. An e-commerce platform should also support the ability to attach multiple pictures to a product catalog page, allowing the consumer to view the product from multiple angles. E-commerce platform needs to be able to associate products with related and complimentary products. The system should allow all tran slation to be done centrally. My M.Sc Engg. in CSE is running at Bangladesh University of Engineering and Technology (BUET), Dhaka-1000, Bangladesh. My research interest areas are the image processing, Computer Networks, Computer Networks and Data Security, Compiler, Theory of Computations, etc. My several papers Published in International Journals. Muhammad Golam Kibria, Assistant Professor and Head, Department of CSE, University of Information Technology Sciences, Dhaka, Bangladesh. I completed Masters in Mobile Computing and Communication from the University of Greenwich, London, UK. My research interests are Computer Network Security and image processing, Sensor, Robotics and Wireless Sensor Network. Mohammad Nuruzzaman Bhuiyan is working as a Lecturer at the Department of CSE IT, University of Information Technology Sciences (UITS), Baridhara, Dhaka-1212.Bangladesh. I have completed my B.Sc Engg. and M.Sc Engg. in CS from The University of Sheffield, Western Bank, Sheffield S10 2TN, UK. My research interest areas are Fundamental of Computer, Web technology, Computer Networks, Computer Networks and Data Security, Theory of Computations, etc. My several papers accepted in International Journals. References [1] http://en.wikipedia.org/wiki/Electronic_commerce [2] Tkacz, Ewaryst; Kapczynski, Adrian (2009), Springer, P. 255 [3] Online Today, The Electronic Mall. CIS/compuserve nostalgia. Http://www.gsbrown.org/compuserve/electronic-mall1984-04/. [4] http://www.marketwatch.com/story/amazon-buysdiaperscom-parent-in-545-mln-deal-2010-11-08/. [5] http://techcrunch.com/2011/03/28/ebay-to-acquire-gsicommerce-for-2-4-billion [6] Miller, Holmes E. And Engemann, Kurt J. (1996); A methodology for managing information-based risk; Information Resources Management Journal; 9:2; 17-24 [7] http://www.e-consultancy.com/news blog/363726/whydo-customers-abandon-the-Checkoutprocess.htmlcopyright 2008 Voloper Creations Inc. 7 [8] http://www.articlesbase.com/e-commercearticles/impacts-of-e-commerce-on-business1882952.html [9] http://www.startupsmart.com.au/mentor/michaelfox/2011-02-03 Authors Profile Md. Akbor Hossain received the B.Sc degrees in CSE University of Information Technology and Sciences (UITS), Baridhara, Dhaka-1212, Bangladesh. I am working as a Lab Demonstrator at the Department of CSE IT, University of Information Technology Sciences (UITS), Baridhara, Dhaka-1212, Bangladesh. *Md. Akkas Ali is working as a Lecturer at the Department of CSE IT, University of Information Technology Sciences (UITS), Baridhara, Dhaka1212, Bangladesh. I completed my B.Sc Engg. in CSE from Chittagong University of Engineering and Technology (CUET), Chittagong-4349, Bangladesh. Volume 2 Issue 2, February 2013 www.ijsr.net

A Biomechanical Analysis of the Roundhouse Kick :: essays research papers

Anatomical Analysis Tae Kwon Do is a Korean, unarmed martial art and is best known for its kicks (Park, 2001). The roundhouse kick is a turning kick and happens to be the most commonly used kick during competition (Lee, 1996). For this reason, the roundhouse kick will be analyzed in reference to sparring competition.   Ã‚  Ã‚  Ã‚  Ã‚  The roundhouse kick, a multiplanar skill, starts with the kicking leg traveling in an arc towards the front with the knee in a chambered position (Pearson, 1997). The knee is extended in a snapping movement, striking the opponent with the top of the foot. One’s goal would be to make front torso contact with the kick, while avoiding leaving one’s self open to a counter strike.   Ã‚  Ã‚  Ã‚  Ã‚  The movements that comprise the roundhouse kick begin with a fighting stance: both feet on the ground, toes pointing straight ahead, back foot turned outside up to 22 degrees, front foot approximately 1.5 the distance of one step from the back foot, both feet approximately one length of one foot apart, extension of both legs, slight rotation of the torso in the direction of the back leg, fists held in front of the chest, flexion at the shoulders by about 45 degrees, flexion at the elbow by about 60 degrees, and flexion of the fingers.   Ã‚  Ã‚  Ã‚  Ã‚  One initiates the preparatory phase of the roundhouse kick from the fighting stance: rotation of the torso in the direction of the front leg, flexion and abduction at the hip, flexion at the knee of the back leg which brings the knee to the torso and maintains a minimal relative angle at the knee to the thigh, plantar flexion of the foot, and lateral flexion of the spine toward the ground away from the kicking leg (Table 1).   Ã‚  Ã‚  Ã‚  Ã‚  The fighter is then ready to initiate the movement phase: extension at the knee with a relative angle to the thigh of about 180 degrees, lateral rotation of the grounded foot between 90 and 120 degrees, and additional lateral flexion of the spine.   Ã‚  Ã‚  Ã‚  Ã‚  After attempting to make contact with the opponent, the fighter immediately follows up with the recovery phase: flexion at the knee, lateral flexion of the spine opposite the aforementioned direction, during a slight rotation of the torso, extension of the hip, and dorsiflexion of the foot. This brings the fighter back into the fighting stance with the opposite leg in the front and is now ready to perform the next strike or counterstrike.

Harvard case essay

Treasury bonds with the same maturity. The deference between selling TIPS and buying T-bonds will cover the Inflation risk losses thus effectively eliminates Inflation risk In the portfolio. The Harvard's Policy Portfolio Includes much of the university endowment, pension assets, working capital, and portfolio contains 1 1 wide asset classes, Including domestic equity, foreign equity, private equity, domestic bonds, foreign bonds, emerging markets, real estate, commodities, absolute return, high yield, and cash.This portfolio was determined by the board of the corporation for the long-run allocation, however, the manager can make short-run adjustment within the limits from the guideline. The reason that HAMS focus on real returns is HAMS want to exclude the influence of inflation and determine the return rate more precisely. As the formula nominal return = real return + inflation rate shows, choosing real return instead of nominal return can reveal the real purchasing power of the in vestment, thus help the manager to conduct more efficiently to prevent the evasion of the investment.As we can see from Exhibit land Exhibit 2, domestic and foreign equity constitute the biggest part of the portfolio, and these two asset classes have high real returns as well as latterly larger standard deviations. And we know that equity premium indicates the difference between the expected return on the market portfolio of common stocks and the risk-free interest rate, and higher risk often indicates higher equity premium.Based on Ham's assumption that the real growth rate of annual spending is 3% after inflation, and that gifts to the endowment are same as the historical average rate (1%), HIM has to maintain a real between 6% and 7% of the total investment In order achieve its preservation goal. Thus HIM has to invest a large portion in US and reign equity with higher premium, resulting in a short of cash. Yes, From inception in 1 997, TIPS had offered a real yield that ranged f rom. 2% to 4. 25%.

Metropolis Movie Analysis

German, silent, science fiction film that was released in 1927 during what was considered to be the end of the Whimper Cinema era. Metropolis is considered to be an expressionist film due to its use of symbols found in the scenery, over exaggerated acting style, and heavy makeup. The scenery in the film was delivered in a black and white, dreamlike, theatrical tone. A lot of the objects found in the scenery were found as a symbolic connotation to the subtle meanings expressed throughout.As discussed in class, we had noticed a definite religious over tone with the imagery seen throughout including scenes displayed in the Garden of Eden, Catacombs, Babel and cross imagery. The main character of the film is a young man named Freer who is the son of the all mighty and powerful Josh Preferred. Josh is seen as a self-righteous and inconsiderate man who is the head of the town Metropolis and is in charge of all the workers whose hands power this town.Josh however is not a fair boss and work s his men to unbearable extremes. As discussed in class, you are able to notice one the many expressionist attributes in this film being how the workers In the film move aerobically as if they are a machine and have been euthanized by their occupation. These workers are not seen by Josh as humans but are rather seen as the light switch flipping on and off the machines, powering his business. Freer is the median trying to bring both of these two clashing worlds together.He tries to help the workers value themselves as human beings as well as help to show his father that these workers aren't his slaves. The expressive and overall basis of the movie Lies within the repetitively used saying throughout the film, â€Å"The median between the hands and the head Is the heart. † The overall meaning of the film Is expressed through the scenery and acting In film. As It Is a silent expressionist film, the acting Is reliant on conveying this meaning by the over exaggerated movements and emotions displayed.

Famous and Wise Quotes About Friendship

Famous and Wise Quotes About Friendship What more can you ask God for, if you have already been gifted a good friend? True friends are difficult to find. Friendship is a flower that needs to be nurtured. Over a period of time, friendship blossoms and makes your life fragrant with love and energy. And should you need a shoulder to lean on, friendship provides you with a strong one. Read these famous quotes about friendship and gain from the experience of the experienced. Euripedes Real friendship is shown in times of trouble; prosperity is full of friends. Marlene Dietrich It is the friends that you can call at 4 a.m. that matter. George Jean Nathan Love demands infinitely less than friendship. Mahatma GandhiIt is easy enough to be friendly to ones friends. But to befriend the one who regards himself as your enemy is the quintessence of true religion. The other is mere business. Pam Brown Odd how much it hurts when a friend moves away and leaves behind only silence. Aristotle Friendship is a single soul dwelling in two bodies. Proverb God save me from my friends I can protect myself from my enemies. Mark Twain The proper office of a friend is to side with you when you are in the wrong. Nearly anybody will side with you when you are in the right. Elbert Hubbard Your friend is the man who knows all about you, and still likes you. Nigerian Proverb Hold a true friend with both your hands. Anais NinEach friend represents a world in us, a world possibly not born until they arrive, and it is only by this meeting that a new world is born. Emily DickinsonMy friends are my estate. Leo BuscagliaA single rose can be my garden... a single friend, my world. Anne Morrow LindberghMen kick friendship around like a football but it doesnt seem to break. Women treat it like glass and it goes to pieces. David Tyson GentryTrue friendship comes when the silence between two people is comfortable. Aristotle My best friend is the man who in wishing me well wishes it for my sake. C. S. LewisFriendship is born at that moment when one person says to another, What! You too? I thought I was the only one. Albert Camus How can sincerity be a condition of friendship? A taste for truth at any cost is a passion which spares nothing.

Soft Skills in the Workplace The Top 4 Skills for Successful Managers

Soft Skills in the Workplace The Top 4 Skills for Successful Managers Ever looked at your supervisor and thought in exasperation, I could totally do that job!? Dont be fooled- odds are theres more to a managers job than meets the eye. If youre a manager yourself or just have your eye on the managerial prize, consider how you can develop and maintain behind-the-scenes soft skills that will keep you at the top of your game like these, from Lei Han at BeMyCareerCoach.com.1. Leadership and People Management SkillsAs a manager, you need the leadership and people skills that will help you attract, retain, direct, motivate, train, and manage the people you supervise. Get to know your workers one-on-one so you can more effectively make use of their strengths, accommodate their challenges, support their goals- employees know when their manager has their best interests at heart, and its a great way to motivate your team.2. Communication SkillsYou have to be able to work up and down the chain of command in your workplace- that means learning to advocate for your team to the higher-ups and  supporting the initiatives that youre handing down to your employees. Make sure everyone understands their roles, and make sure you offer a receptive ear whenever one of your employees needs to be heard.3. Conflict Resolution SkillsNothing says Im in charge like being the end of the line for employee conflicts. Incompatible personalities or differences of opinion on a complex project can blow up into a catastrophe if not managed from the start.  Take the time to assess your mediation skills. If they could use a tune-up, see what programs or classes your company might offer to help you improve them. You can then offer coaching to employees that helps them resolve future conflicts on their own, paying your new skills forward and making everyones worklife run more smoothly.4. Networking SkillsFor managers, the ability to foster relationships and put the right people in touch with one another solves problems and generates great ideas. Its a demonstration of judgment and generosity that supports all of your employees across different divisions and departments.Keep in mind that skills that support are just as important as skills that demand accountability when it comes to managerial relationships; soft skills like these will help you remember your employees are people first, and workers second.4 Soft Skills Every Manager NeedsRead More at bemycareercoach.com

Critical thinking Essay Example | Topics and Well Written Essays - 500 words - 7

Critical thinking - Essay Example ‘Positive reinforcement’ is experienced when occurrence of an event happening after a response raises the probability of that response to take place another time. The event that is presented is something an organism likes or prefers, and can be referred to as appetitive stimulus. The organism will do nothing to evade the event or the appetitive stimulus because of love for it. Moreover, in ‘positive reinforcement’, a raise in a propensity to respond is the fact that is significant most rather than subjective traits. It is established that an outcome becomes a ‘positive reinforcement’ when it makes the response to happen again (Coon, Mitterer, Talbot & Vanchella, 2010). For example, I like to drink cold water, since I would want to take icy water regularly when feeling thirsty. Additionally, I have a passion of drawing and singing; hence, I find myself singing and drawing most of my free time over and over again. The type of reinforcement takes place when a response is expected to happen another time when an event is removed. It occurs when an outcome of an occurrence makes a person to get rid of the odious circumstances. It is imperative to notice that ‘negative reinforcement’ does not entirely refer to unfortunate events, but particularly refers to events that lead to taking away of something (Coon, Mitterer, Talbot & Vanchella, 2010). Examples of events of ‘negative reinforcement’ include watching a boring movie or listening to noise from a neighbor. An individual will walk away from a cinema hall when the movie he/she is watching becomes uninteresting and tedious. In the situation of irritating noise from a neighbor, I often settle on staying in my room to lessen the tone of the sound. ‘Positive punishment’ refers to the occurrence of an event, which occurs after a response that decreases the possibility of the response from happening yet again. It occurs when the response of the event leads to