Swimming And Biomechanics Essays - Aerodynamics, Fluid Dynamics

Swimming And Biomechanics Natural forces affect the movements of swimmers in water. And it is often useful to know how these forces act. This knowledge will help swimming teachers and coaches analyze swimming skills and assist them to understand how these forces influence movement, so that they can encourage beginners to be better swimmers or good swimmers to achieve there optimum potential. Biomechanics is the branch of science that is concerned with understanding the relationship between a living body's structure and function relative to movement. In this paper the swimming form of the front crawl stroke will be analyzed, which may result in improvement in the following areas: ? Improving performance ? Preventing injury ? Correcting weaknesses ? Identifying ways to alter human movement patterns "Biomechanics is considered to be the physics of how the body moves. When these physical principles are applied to sports skills it becomes an integrated study between the internal forces produced by the body and the naturally occurring external forces that act on the body as skills are executed (Carr, 1997, p4.)". Although the final quality of movement will totally depend upon the athlete's (swimmer's) ability to integrate both internal forces generated by muscular actions with the external forces of gravity, buoyancy, fiction and mass that are present during swimming. When looking at swimming one must first look at how the human body acts and generates forces in water. "Water is a unique environment. It possesses qualities that will assist the swimmer, but it also has qualities that will impede the swimmer's progress through the water. For instance, the water's density provides a buoyant force for the swimmer, while at the same time providing resistance to the swimmers propulsion (, 1995, p42)". Topics to continue with: Main principles and their application Density Water Resistance Skin/Frictional Resistance Frontal/Wave Resistance Eddy/Turbulence Resistance Propulsion Water Friction Propulsive Drag Lift Force Streamlining The main principles and their application of the front crawl stoke Buoyancy & Flotation An object that is immersed either totally or partially in water experiences an upward force as the water's density endeavors to stop it from sinking (Maglischo, 1982). This upward force is known as the buoyant force and acts through the center of the displaced water. This force therefore, tends to counteract the effect of gravity and the weight of the object, the net result being that the weight of the object is reduced by the upward force of buoyancy (Costill, 1992). (#Diagram#) Every object has an absolute center position where all forces exerted by the body equal zero. This central point of an object's mass is known as the center of gravity and is the point around which it balances. "The center of gravity is approximately 50-52% of an individuals height, as there is an equal spread of mass above and below this point (Allen, 1999)". The same can be said for the center of buoyancy, as above and below this point there is an equal spread of volume of the displaced water (Allen, 1999). The location of the center of buoyancy which is the center of the water displaced by the body, is actually closer to the head than in the location of the center of gravity. The reasons for this are: ? The volume of water displaced has a greater mass then the chest area. ? The chest has a lower density than the water because of its lung capacity. Therefore the upward force of buoyancy acts thought a point higher up the body than the center of gravity (Costill, 1992). (#Diagram#) (I may need to include more?) (And relate it back to the front crawl?) Density The term specific gravity is used to describe the ratio between an object's density to that of water's density. "Pure water density being the "reference point" having a specific gravity of 1.00 (Carr, 1997, p67)". Therefore anything placed in water will float or sink in accordance to it's own specific gravity value. Anything greater than 1.00, will sink. While anything less than 1.00 will float. In the human body there is variation from person to person, this is due to the amount of air in ones lungs and the percentage of bone, muscle and fat, which all vary in their own individual masses. Both bone and muscle are heavier than fat. From this information one can assume that a lean and muscular body or one with a heavy bone structure, will not float as well as one that is the opposite. (Chart #1.) Relationship between Specific Gravity & Body Composition Studies have shown that: "in

Book Review on OVER HERE the first world war and American society essays

Book Review on OVER HERE the first world war and American society essays A good and nearly complete account of the happenings during the first nineteen months of the participation of United States in the First World War has been documented in "Over Here" by David Kennedy. The details in this book are between the period between April 2, 1917 when the war message was first given to Congress by Wilson and November 11, 1918 when the Armistice was signed, the book gives details of the political innovations, social disruptions and the cultural heritage of the experience of America There is a brief prologue which sets the stage, and then Kennedy plunges into the description of the war for the Americans, and the thoughts that accompanied the entry of US into the War. At the same time, one has to remember that Wilson had won the re-election in 1916 as he had promised to keep America out of the War, and this required him to make some explanations when the country got involved. In this case also Wilson applied the master strategy that he had used from the beginning to the end of his career - appealing directly to the people. This united their convictions, awakened their emotional energy and unleashed his massive The progressive community was a surprising assistant of Wilson in this involvement. This group had earlier viewed the war as regressive and a return to medieval violence, and thus a remnant of the feudal past of history. The exhortations of John Dewey and the New Republic awakened these people and they started supporting the war effort. The Great War was viewed as an important opportunity with a lot of possibilities for the society (49- 50). The other group of the conservatives always rally around the flag, and this war was no exception. With this the left and the right soon got involved into interpretations of the war in the schools and colleges ...

EPUB vs mobi Which eBook Format Should You Use

EPUB vs mobi Which eBook Format Should You Use EPUB vs mobi: Which eBook Format Should You Use? EPUBs and mobi  files are the most common ebook formats in the world. If you're a self-publishing author looking to distribute your title in ebook stores (which you should: some of the most voracious readers own e-readers) you will need to know a little about these two file types. In this post, you will learn everything you need to know about the Clash of the Titans that is epub vs mobi. Finally! EPUB vs mobi! What's the difference? #selfpub #kdp What is an EPUB?An EPUB file is the most widely-accepted ebook format on the market. It’s the industry standard, used by Apple, Kobo, Barnes Noble, Sony and Google e-readers.A free and open standard based on HTML (much like the files your web browser would read), EPUB is a remarkably flexible format that supports a wealth of features. It can optimize a book’s text to fit your device, embed images, and allow for bookmarking, highlighting and text-to-speak. The latest version, EPUB 3, will even permit you to add multimedia content like video and audio clips.All around, it’s pretty great - which is why the publishing industry has rallied around it as its ebook format of choice. If you want to upload your book directly to almost any ebook retail platform – through Kobo Writing Life or Nook Press, for example – or use an ‘aggregator’ like Smashwords or Draft2Digital, you will need to have an EPUB file.So what’s stopping EPUB from be ing the single digital book format?What is a mobi file? Does Moby prefer mobis to EPUBs? One can only assume.Mobi files are the ebook files used exclusively by Amazon’s Kindle Store. Or, if we're staying up-to-date, the actual proprietary standard is now called AZW. The major difference between mobi files and EPUBs is that the Amazon format is protected by  Digital Rights Management (DRM) which ‘locks’ the book so it can only be read on devices associated with your account. Amazon is the largest ebook retailer in the world by quite a long way: in 2015 they were responsible for over 70% of ebooks sold in the US. This massive market share is part of the reason why they can insist on using their own format.To summarize: the Kindle store uses mobi files, and every other major ebook uses EPUBs. But, if you're an author looking to export an ebook file that's compatible everywhere, what can you do? Well, the short answer is that you should export an EPUB, for reasons we'll look at right now. If you have an EPUB that you want to convert to mobi  right now,  you can simply put it through our  EPUB to mobi converter! You'll get a beautiful new mobi file in your email inbox within minutes.Amazon's Kindle Direct Publishing platform also has an integrated tool which will convert EPUBs into mobi files. The Reedsy team ran countless tests and found the conversion to be pretty seamless.Finally, if you export an ebook using the Reedsy Book Editor, you will have the option to choose your ebook retailers. If you select 'Amazon' as an option, you will download your book in mobi format.When should you use PDF files?The PDF, which has remained one of the most popular document formats since its debut in 2001, is still widely used in publishing for two purposes. Print on DemandPerhaps the most cost-effective way of selling physical copies on a small scale, self-publishing authors commonly use what’s called a print-on-demand (POD) service. Instead of ordering a print run and filling a warehouse with paperbacks, copies will only be printed as and when they’ve been purchased either by individual buyers  or a bookstore.The two most popular POD services are IngramSpark and KDP Print  (formerly CreateSpace), the latter of which is - would you believe it? - an Amazon company. A print-on-demand book, sourced from a PDF file.For this, you will need a file that contains strict definitions of your book’s layout and content – which is why we use PDF files. There are countless different types of PDF out there but for our purposes, the format will need to a ‘print-ready PDF’ to make it compatible with printers.   Any hyperlinks will be removed and your image colors will be expressed in CMYK, and not using the RGB color model.Graphically Intensive eBooksBoth EPUBs and mobis are great at handling text-intensive books like novels, memoirs and some non-fiction books. They are, however, less awesome at dealing with books that have a lot of images, graphs and photos - art books and travel guides, for example. If you need your ebook to look exactly the same as the print version, you may wish to sell it as a PDF, which will ensure fidelity across all devices.The downside is that basic black-and-white Kindles (and e-readers like it) will str uggle to display them well - as these PDF books will tend to be fixed-width. Unlike an EPUB file, where the text is "reflowable" and will adapt to the shape and size of your device, reading a small-print PDF book on a Kindle Paperwhite is nothing short of a chore.Creating EPUBs and print-ready PDFsReedsy offers a free online book editing tool that lets you professionally format a book with no training required. Once you’re happy with how it looks, you can export your book for free as both EPUB and print-ready PDF files! To find out more about how the Reedsy Book Editor can help you publish your own book, click here.To learn more about how to set up your ebook on the different retailers, read our master guide on ebook publishing platforms.If you have any thoughts or questions on choosing a file format, drop us a message in the box below.

Social Networking Essay Example | Topics and Well Written Essays - 1250 words

Social Networking - Essay Example Social network comes in various forms and sizes and serve many purposes. Social networking is necessary for the survival and advancement of the society. The invention of telegraph, radio and internet have created and maintained social networking despite of the vast distance between the people. The ability of people to communicate across the planet has give way to different forms of social networking mediums. Friends can now easily connect with each other being thousands of miles apart. As per TechTarget,(2008)â€Å"The social networks we speak of today, such as Face book or MySpace, provide incredibly rich communications. Pictures, audio recordings, video recordings can be freely shared by anyone with an internet connection†. These facilities have given rise to a new category of social networking. Websites and internet now provide many opportunities that were not possible before. Social networking are application available on internet which has log – in page, user accou nt and a bunch of games and tools to have fun with friends while we are logged in. The social networking sites has a great influence on today’s youth and give them different identity and interacting platform. The Social networking is not new concept The concept of social networking is not new even though people are only familiarized with it recently. Individuals can connect within a social network where they work together, study together, lived together or share certain interests. Individuals are usually drawn to people with whom they can relate to. According to Ronca(2009)â€Å"Social networking is not a new concept. In fact, it's been around as long as we have. A social network is simply the structure of relationships among individuals†. Everyone on the earth is a part of one social network and we knowingly or unknowingly engage in social networking. We are engaging in small sub networks which consist of our families, friends, colleagues, school and community. Our so cial networking multiplies consistently as we are all time in contact with people. Social networking is not at all new and can be traced to 1800s. In the article Larrivee(2011)writes that â€Å"Social networking is not a new concept in fact it is really quite old with formal recognition surfacing in the 1800’s yet if you consider ancient Rome and Greece, one might say that it really began in those times†, People in olden times use to socially and politically interact .Social networking in past happened in the same ways as today but only the platform where it took place was different. In the past, people met in real world, whereas in the present people virtually meet and interact. Social networking started since the early men started living in communities. It started before the invention of internet in villages and olden cities People in villages gather around trees in free time and discussed everything and anything. Social networking existed in olden days In olden time s people gathered on festivals and social get together and interacted with each other freely. They met in churches and temples and shared their ideas and views about daily activities. People in olden days had their share of fun and relaxation whenever they met like the new generation. Human is a social being and he needs to be active in social life to make things pleasant. Today the internet has taken the place of other social gathering venues but social networking happened since ever.In ancient times, people where more of socializing nature as they were not much restricted to their homes. They always met people in outdoors and had more opportunity to interact with each other. In ancient times, festivals and fairs where the venues where people met each other and engaged in pleasurable acitivities.People used to meet and

Using an extended example critically examine whether the sector matrix Essay - 1

Using an extended example critically examine whether the sector matrix framework gives a better strategic understanding of product markets than the concepts of product or comodity chains - Essay Example een dominant concept within theoretical framework of economics as well as strategy studies as different theoretical frameworks such as BCG and Porter’s ideas gave rise to the overall concept of the value chain. However, on a much bigger scale, the idea of value chain encompasses a much larger significance because it interconnects different industries either within the borders or outside the borders of the company. This therefore also means that the global supply chain management is not just a mere concept but a social as well as economic phenomenon. The concept of global commodity chains emphasized on the spatial and territorial dimensions of doing business and is based on the concepts of global chains. A new and more innovative concept is the concept of sector matrix which outlines the interplay of demand and supply forces. By emphasizing the demand distribution and supply interaction, the sector matrix increases the field for visible as it attempts to define much more complicated activities and put more focus on redefining competition not from the perspective of the competing manufacturing systems but from really divergent prospective. Globalization of economic resources of the world have given rise to a new phenomenon where products are hardly produced in the domestic markets as there are innumerable linkages between different players which collectively contribute towards the development of chains which regulate the whole process of manufacturing activity. For example, NIKE outsources almost all of its manufacturing facilities and goods sold in US are made in various countries of the world. Porter’s ideas on the five forces indicate how the firm in a particular industry can gain the competitive advantage. The Porter’s five forces discuss the impact of buyer and suppliers on the given firm as the interaction of both the entities on the firm defines the overall competitive advantage of the firm. What is also however, critical to note that the existing

Jack London :: essays papers

Jack London A Study of Jack London’s Belief in Darwinism Jack London has a strong belief in Darwinism, survival of the fittest, during the late 1800’s through the early 1900’s, when he wrote. Throughout his writings, many characters display London’s belief in Darwinism. In the novel, The Call of the Wild, Jack London’s belief in social darwinism is portrayed by animals interacting with humans, each other, and the environment. This can be shown through Buck, a house dog turned sled dog, interacting with his masters, other dogs, and the Yukon wilderness. As Buck travels from master to master throughout the course of the novel he learns, through trial and error, what behavior brings rewards, and that which brings punishment. [Buck] had never been struck by a club in his life, and did not understand. ...he was [now] aware that it was a club, but his madness knew no caution. A dozen times he charged, and as often the club broke the charge and smashed him down (London 18). Buck â€Å"...had learned the lesson, and in all his after life he never forgot it. That club was a revelation. ...the lesson was driven home to Buck: a man with a club was a lawgiver, a master to be obeyed...† (London 20). Buck learned to do as his masters say. â€Å"...he grew honestly to respect them. He speedily learned that Perrault and Francois were fair men...† (London 21). Buck also learned when and how to defend himself against man. London’s depiction of Buck’s struggle to learn how to survive in an unfamiliar environment has been compared to western society’s struggle with encroaching communism. â€Å"The study of Jack London’s work became a mirror of the turbulent McCarthy era...† (Veggian 2). Through these struggles, Buck was able to adapt and survive in a world controlled by man. Buck also had to learn when and how to fight other dogs. Eventually Buck Fought and killed Spitz to become lead dog. â€Å"Buck stood and looked on, the successful champion, the dominant primordial beast who had made his kill and found it good† (London 42). London often witnessed these dog fights and this influenced his writing. â€Å"...he found the first successful theme for his writing in a last frontier splurge...† (Walker 12). Although Buck had troubles with his new peers, he also had a great conflict with his new home.

Should we adopt the Euro?

In recent years there has been much debate as to whether the benefits outweigh the costs of adopting the Euro currency. This argument, often a fierce and personal one, has covered the front pages of newspapers for a very long time, and continues to rage on today. But what are the arguments, and should we really join the Euro? Let us start off with the benefits of joining the Euro. One large benefit would be the ease of which one would be able to check different prices across Europe due to one, single and only currency. This would mean that a great deal of time spent on checking, and comparing different prices in different countries with different currencies, would be a lot shorter. So, as a result, international trade and purchasing would be much easier and more time could be spent elsewhere. Another great benefit of the adoption of the Euro is the greater competition that it would induce in the market; the pressure to lower inflation and increase productivity would lead to the need for more innovation in the markets, thus creating a healthier and an ever-growing economy. This would mean that the chance of falling into a recession would be lower, employment would be higher, and incomes would as well. A third benefit is the encouragement of foreign companies to invest in the Eurozone. In due course, more money would be pumped into the economies of Europe and therefore generally Europe would be richer, especially the countries that adopted the Euro. Finally, joining the Eurozone would cause Britain to join a large group of countries that could, when working together, play a large role on the stage of world politics, with the voices of smaller countries in the Euro able to have a say on various topics. On the other hand, there are some strong arguments against joining the Euro. A rather surprisingly popular, if a little stupid, reason put forward is patriotic one – the centuries-old tradition of having the monarch's face on bank notes and coins would be ridden of if the country were to join the Euro, replaced with less patriotic images of Europe. This view is, quite unsurprisingly, not held with very high regard among those for joining the Eurozone. Another argument against adopting the currency was the 20% devaluation of the pound sterling in 2008-10, resulting in not such a bad recession. It was possible that if the UK had been in the Euro at the time, the general economic situation would be a great deal worse than it already is. A third argument against joining the Euro the problem of one Eurozone country's economy failing resulting in more damage to the other countries that use the Euro. This means that if a small country's economy failed, then the effects on other Eurozone countries would be greater due to the reliance on other countries in the Euro. In conclusion, I feel that, while the patriotic argument is quite weak, there isn't much use in joining the Euro, especially when its present situation is so bad considering the recession we find ourselves in. Perhaps, though, in a few years the UK may adopt this single currency, and instead of asking what the costs and benefits are, we must ask ourselves: â€Å"will it last? â€Å"