Heart :: essays research papers

PRACTICAL EXERCISE 4 HEART STRUCTURE AND CIRCULATION Q.1 Describe the heart sounds you hear. Explain the origin of two sounds. Two heart sounds are normally heard through a stethoscope on the chest wall, "lab" "dap". The first sound can be described as soft, but resonant, and longer then the second one. This sound is associated with the closure of AV valves (atrioventricular valves) at the beginning of systole. The second sound is louder and sharp. It is associated with closure of the pulmonary and aortic valves (semilunar valves) at the beginning of diastole. There is a pause between the each set of sounds. It is a period of total heat relaxation called quiescent period. Q.2 Which structures are responsible for these sounds? If these structures were damaged or functionally incorrectly, what do you think would happen to the heart sound? The structures responsible for these sounds are: pulmonary, aortic and atrioventricular valves. These sounds are results of vibration caused by closure of these valves. Other sounds known as "heart murmurs" are sometimes a sign of heart disease. "Murmurs can be produced by blood flowing rapidly in the usual directions through an abnormally narrowed valve" (Vander, Sherman and Luciano, 1985, p.326) and in some cases, as mitral valve prolapse, the individual does not show any symptoms. Q.5 If a glass probe is poked into the pulmonary trunk which chamber will it enter? The glass probe poked into the pulmonary trunk will follow the cycle of blood from the pulmonary artery to the lungs and then through pulmonary veins will enter the left atrium. Q.6 From which chamber does the aorta arise? Aorta arises from the left ventricle. It is the largest artery in the body and it transports the oxygenated blood away from the heart. Q.7 (a) Where do the coronary arteries start? (b) Use this knowledge to explain how the coronary arteries only fill with blood during diastole. The heart, like other organs, receives its blood supply through the smaller vessels of arterial branches. In this case, coronary arteries, which starts from the base of ascending aorta. The blood circulates through coronary arteries and then to smaller vessels into cardiac muscle (myocardium). The blood flow is influenced by aortic pressure, which increases in systole, and the pumping activity of the ventricles. When the ventricle contracts, in systole, the coronary vessels are compressed by the contracted myocardium and partly blocked by the open aortic valve therefore the blood flow through the myocardium stops.

Project Management Institute Essay

The main motive of the Project Management Institute is to make the project management indispensable for the generation of the ultimate business results. PMI functions in over 170 countries having members more than 265000 at their advantage, thus making it as a leading membership association for the profession of project management. It is one among the best not-for-profit and non-political organization which conducts programs with the governments, industries and organizations to deliver the best project management programs with the best results. PMI education foundation speaks on the knowledge gaining and portraying the skills and the art for educational and social welfare. PMI also promotes research and providing avenues for building up wealth of information and also indulging in offering certification, networking and activities involving the community at large, thus managing to attain its global presence and global certification in their noble profession. Scope of its Membership: Becoming a member of the PMI institute gives an opportunity for the members to get themselves certified as a professional imparting and demonstrating the skills required thereby helping themselves in standing out in the crowd. To become a member PMI has varied plans suiting the different segments based on their needs where in there are plans for an individual – for those willing to learn and update the best practices in businesses, student – those having degree program at a recognized institute, retiree – having retired from active employment and has a good reputation for 5 consecutive years and those interested in renewing their memberships (renewal). The various benefits which the memberships provide – include the vast knowledge sharing and information search happening in generating the opportunities for themselves and the institute. It gives immense openings for capturing on the capability of getting them networked through the different PMI communities there by getting nurtured with respect to the leadership qualities and being an active participants as volunteers in the various communities, certification programs, research programs, standard programs etc. The members also have scope of getting accessed to the knowledge resources of PMI known as the Project Management Body of Knowledge and also their career frameworks. Along with this opportunity which the members can acquire, they also have an edge over non-members in terms of getting access to the various publications, journals, e-links, virtual library, eReads and References which are set by PMI. The reason one should join PMI is to allow them to be build relationships, improvise on once skills, gain the latest and the first hand information and learn some of the best known practices. Memberships in PMI showcase certain features and characteristics to the peers which indicate their enthusiasm in quality, productivity and return on investments, their seriousness about their own individual development and their own profession and finally their commitment to the ethical business practices shown by the institute. The services which PMI provides to its members – With respect to the career development provided to the members of PMI, the association helps in availing the Certification and the Credentials, providing an extensive job search database which is availed by Career Headquarters at PMI, Making themselves groomed by undertaking various Training and Events happening by seminar worlds, to e-learning initiatives and providing the ultimate solution to the best practices and opportunities in the field of learning and in turn meeting up to the schedules, goals and the interests of the institution. PMI also guides the members in customer services, flexibility in changing and viewing orders, information on payment, pricing and promotions opportunities, shipping and handling assistance, privacy and security all under one umbrella known best for its marketplace. PMI has a strong Business Solutions concept which keeps the members get going by the challenges they have in career framework, Business and Government solutions on a global front to build up the institution on a worldwide basis and providing Organizational maturity in terms of managing the projects, programs and portfolios to generate and plan for its growth. This PMI provides project management implementation and consultancy services to their members and customers by providing added benefits in terms of the latest releases, news archives, articles of interests etc. The five major groups which PMI builds upon its profession are Initiating, Planning, Executing, Monitoring and Controlling and closing phases and the various knowledge areas which they address to are integration, scope, time, cost, quality, human resources, communications, risk management and procurement.

Plate Tectonics Essay Essay

Assess the strength of the relationship between tectonic processes and major landforms on the earth’s surface. Tectonic processes have been responsible for the major landforms across the Earth’s surface. These processes are controlled by the convection currents rising from the Earth’s mantle. Firstly, one place where tectonic activity occurs is at oceanic to oceanic constructive plate boundaries. Here two plates diverge or move away from each other, pushed apart by huge convection currents In the earth’s mantle. These convection currents are initiated by heat energy produced from radioactive decay in the earth’s core. As the convection currents move the plates away from each other, there is a weaker zone in the crust and an increase in heat near the surface. The hotter, expanded crust forms a ridge. Magma rises up from the mantle in the gap. The lava cools, solidifies and forms a chain of volcanic mountains thousands of miles long down the middle of the ocean eg. Atlantic. There are transform faults at right angles to the ridge. The movement of these faults causes rift valleys to occur. Examples of these landforms created by constructive plate margins are the Mid Atlantic Ridge (MIR) , and the Great African rift valley (GARV). The MIR is the result of the North American plate and Eurasian plate diverging in the middle of the Atlantic ocean. Here, volcanic islands such as Iceland, the Canary islands and ascension island have been created by the rising magma from the mantle. The GARV is an example of where the crust has dropped down between parallel faults to form rift valleys. As the crust subducts into the mantle it melts causing igneous activity below, magma to rise and therefore volcanoes erupt on the surface as a result. Evidence of this volcanic activity is shown by Mount Kenya and Mount Kilimanjaro. The lava here has a low viscosity, it very hot (1200 C) and has a low silica content. An example of where landforms have been created at a different plate boundary, a destructive plate margin, is where two plates, the Nazca plate, an oceanic plate, and the South American plate, a continental plate, converge. Here, two plates meet and the denser oceanic lithosphere of the Nazca plate is forced down under the more buoyant continental lithosphere of  the South American plate, descending at an angle into the mantle in a process called subduction. This is marked on the ocean surface by the presence of the Peru-Chilie trench. The friction between the plates prevents the subducting oceanic plate from sliding smoothly. As it descends it drags against the overlying plate causing both fracture and deform. This results in frequent shallow focus earthquakes The subduction of the Nazca plate under southern Chile produced the largest earthquake ever recorded, with a magnitude of 9.5 in 1960. Volcanoes are also created here as one plate subducts and partially melts; the magma rises up through fissures and can reach the surface. The type of lava here is andesitic, very high in silica and not very hot resulting in a composite volcano being formed out of layers of ash and lava. The cascade mountain range is an example of where a destructive plate boundary has caused the Juan de Fuca plate to subduct under the North American plate. This resulted in 15 composite volcanoes being formed, one of them, Mount St. Helens. Similar to the peru-chile region, the Japanese islands are situated in a subduction zone. In the northwestern margin of the pacific oceans, the pacific plate and Philippine plate converge. On the pacific side, trenches run parallel to these islands. As one plate subducts beneath the other, it heats up and melted magmas rise towards the surface. These Japanese island arcs extend 3000km and magma produced under them form felsic plutonic rocks (granite), some of which erupts on the surface to make volcanoes. Large-scale formation of granites develops the crust of island arc. On the other hand, some tectonic activity doesn’t produce any landform. An example is at the San Andreas Fault. Although both plates are moving in a north westerly direction, the pacific plate Is moving faster than the north American plate (7cm/year faster), so the relative movement of the north American plate is to the south east. The pacific plate is being moved northwest due to the sea floor spreading from the pacific coast rise in the gulf of California. The North American plate is being pushed west and north due to sea floor spreading of the mid-Atlantic ridge. Movement is sporadic and jerky. Frictional forces lock the blocks of lithosphere together for years at a time. When frictional forces are overcome, the plates slip and  shallow focus earthquakes are generated. Similarly, landforms can be produced without the source of tectonic activity. The Hawaiian islands are not connected with any plate boundary. The volcanic area is caused by a localized hotspot beneath the pacific plate. A concentration of radioactive elements inside the mantle may cause such a hotspot to develop. From this, a plume of magma rises to eat into the plate above the hotspot. The hotspot is stationary so as the pacific plate moves over it, lines of basaltic shield volcanoes are created. These can be eroded to have flat tops called guyots. In Hawaii, the main island is closest to the hotspot and so it is the most volcanically active. However as the pacific plate moves north west at 10cm/year, a new island, Loihi will form as the submarine volcano builds up to sea level. Finally, collision plate boundries.. When continental and oceanic plates collide, the thinner and more dense oceanic plate is overridden by the thicker and less dense continental plate. The oceanic plate is forced don into the mantle by a process called subduction. As the oceanic plate descends it is forced into higher temperature environments. At 100 miles deep the subducting plate begins to melt. The partial melting produces magma chambers above the subducting oceanic plate. The magma ascends through the overlying materials, melting and fracturing its way up. If the magma rises to the surface without solidifying it will break through in the form of a volcanic eruption. The Himalayan mountains are an example of where the Indian continental plate has been put under extreme pressure as it collides with the Eurasian plate, forcing the edges of the pates upwards in to a series of folds, as one subducts beneath the other. In conclusion, the strength of the relationship between tectonic processes and major landforms on earth can be described as strong. There is a clear correlation between the events that occur at constructive, destructive and collision plate boundaries and the landforms produced consequently. Although there are situations where the two are not linked, ultimately the characteristics of the landform will have been influenced by some soft of tectonic movement. For example, the chains of Hawaiian hotspot islands are  in this shape due to the northward movement of the pacific plate.

Kyrgyzstan Essay Example

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How Many Pounds in a Ton A Fascinating Story

How Many Pounds in a Ton A Fascinating Story SAT / ACT Prep Online Guides and Tips The most basic answer to the question of how many pounds in a ton? There are 2000 pounds in a ton. Still feel confused? You're not alone. But why is the ton a measurement that no one ever quite understands or remembers? This conversion is endlessly confusing because a ton can refer to different forms of measurement. In this article, I’ll explain exactly what a ton is, what it measures, and how to convert tons to pounds. I'll go into the differences between a ton, a metric ton, and several other kinds of tons. And finally, I'll give you a brief history of this often mixed up and misused unit of measurement. The Basics: What’s a Ton? How Do You Convert Tons to Pounds? First things first: here are the most basic facts you should know about tons. If you live in the US, then when you encounter a reference to a ton, you're looking at a measurement of mass. The conversions for tons to pounds and pounds to tons are below: 1 ton = 2000 pounds 1 pound = 1/2000 of a ton But what if you dig a little deeper into this unit? Let’s check out some other kinds of tons around the world. What’s the Difference Between a Short Ton, a Long Ton, and a Tonne (Metric Ton)? One of the reasons the ton is such a confounding measurement is that there are actually three different kinds of tons in use around the world. Short Ton The United States has never adopted the metric system for measuring things. Instead, our country uses a system called customary units. To measure mass, this system uses pounds and ounces as well as the tons I described in the previous section. The US ton is called a short ton. 1 short ton is 2000 pounds. Long Ton The United Kingdom uses a mix of the metric system and the older Imperial system for its measurements. This means that they measure mass sometimes in kilograms and other times in units called stones. The ton that is used in Imperial measures is a little heavier than the US one, so the UK ton is called a long ton. 1 long ton is 2240 pounds. Tonne (or Metric Ton) Most other countries have by this point fully adopted the metric system, and use grams and kilograms to measure mass. The metric ton is never officially called a metric ton, and is instead called a tonne (pronounced just like the word â€Å"ton†). 1 tonne is 1000 kilograms, or 2,204.6 pounds. Short Ton, Long Ton, and Tonne Conversions 1 short ton = 0.89 long tons = .9 tonnes = 2000 pounds = 907 kilograms 1 long ton = 1.12 short tons = 1.01 tonnes = 2240 pounds = 1016 kilograms 1 tonne = 0.98 long tons = 1.1 short tons = 2204 pounds = 1000 kilograms So, in order from lightest to heaviest, it goes: 1 short ton 1 metric ton 1 long ton. Tons are like nesting dolls- each a slightly larger version of the next. Why Are There So Many Different Tons? The word "ton" originally comes from a measurement of volume called a â€Å"tun†- basically a very big wine-making cask. And you're right- this does, in fact, mean that originally a ton was a measurement of volume rather than mass! Eventually, it was determined that a tun could hold about 2000 pounds worth of wine, and the term "ton" evolved to describe this weight. The short ton and long ton measurements diverged when this wine-making measurement was standardized. In the US and the UK, the ton was defined as 20 hundredweights (another unit of mass). But, while in the US 1 hundredweight = 100 pounds, in the UK 1 hundredweight = 8 stones. Since 1 stone = 14 pounds, the UK hundredweight = 2 pounds. The US took the road less traveled- and that has made all the difference. At least as far as short tons are concerned. What Other Kinds of Tons Are There? In addition to the three types of tons above, there are many other sorts of tons that are used to describe a wide range of measurements. These less common tons are generally quite specialized, meaning you're unlikely to encounter them in your day to day life. Still, the diversity of usage certainly helps explain why the word ton is frequently so confusing. As we go through the other kinds of tons, notice how sometimes the ton is used to measure mass, sometimes to measure volume, and sometimes it's not a measurement at all- but instead a standard quantity! Tons in the Ocean At sea, tons typically have to do with measuring ships- and in this context, tons are generally a way to express volume rather than mass. Deadweight Ton. A volume measurement of a ship's carrying capacity, including cargo, ballast, crew, and supplies. It is expressed in tonnes or long tons. Register Ton (or Tonnage). A volume measurement of a ship’s cargo capacity. Tonnage isn’t the same thing as the weight of a ship (called â€Å"displacement†). Ton Class. A volume measurement that categorizes types of yachts based on the capacity of the hold. Displacement Ton. A measurement of the weight of a ship. It’s called â€Å"displacement† because you calculate it by measuring the volume of water that a ship displaces, and then converting this volume into weight. Tons in the Ground One of the uses of "ton" as a standard amount rather than a measurement happens with ore. Check out the "assay ton" to see that a ton can sometimes mean a very small amount of something! Dry Ton (or Tonne). A measurement of mass used for material that’s usually wet but has been dried for transportation (think sludge, slurry, or compost, for example). Assay Ton. This is not a unit of measurement, but is always either 29 1⠁„6 grams (short assay ton) or 32 2⠁„3 grams (long assay ton)- much lighter than a pound! This amount is the standard quantity of ore necessary for testing the ores of precious metals. Tons of Energy Here, the ton is so removed from its original meaning that it's used to measure energy output in the same way that units like the joule or the calorie do. Ton of TNT. This kind of ton is not a measurement of volume or mass, but instead, a specific amount of energy- 109 calories (about 4.184 gigajoules)- generally used to describe nuclear weapons or earthquakes. This energy unit hasn't had anything to do with the actual chemical TNT for a long time. Tonne of Oil Equivalent. Another standard energy value, based on the amount of energy released by burning one tonne of crude oil. The very similar "tonne of coal equivalent" is the amount of energy released by burning one tonne of coal. Tons of Cold Ton of Refrigeration. This is a measure of heat absorption used for refrigeration and air conditioning, and comes from the days when cooling was accomplished only through ice. 1 unit ton of mechanical refrigeration is the capacity to meet the consumption of 1 ton of ice in 1 day. That's a good-looking ton of ship. So, Really, How Many Pounds in a Ton? All you really have to know is that in the US, a ton measures mass and is the same as 2000 pounds. It helps to have a general sense that the US short ton, the UK long ton, and the metric ton are slight variations on the same measurement. To be a ton superstar, you should remember that the ton started as a measurement of volume and is still used that way about ships.

Please Reply to at least 4 student with no more that 60 words plus 2 Coursework - 1

Please Reply to at least 4 student with no more that 60 words plus 2 references - Coursework Example elaborates the general output that are seen from the functions of so called informal leaders and their formal leaders counterparts (Herda-Rapp, 1998). Through the generalization of outputs, it was realized that leaders, be they formal or informal all are expected to come out with certain results and this is where their assessment should come from (Fawoud, 2009). The writer has a major strength in his presentation and this strength is judged from the amount of detail given in the background of the term informal leadership. Such detailed background made it easier to have a broader perspective of how informal leadership has affected social life (Fawoud, 2009). The wrier then built on the background to come to a conclusion that informal leadership and followship has all being about the need to achieve a common goal; and that this process ought to be supervised by one of the members of the group, who is the leader (Gardener, 2008). The writer used an important component of writing skills to make the distinction between informal leadership and followership clearly known. This component was the need to compare and contrast specific scenarios, where two different organizations were make the focus. Through the discussion, it was realized that everyone is a follower at one point in time or the other (Fawoud, 2009) and that leaders even become followers at a point because of the need to follow their own instructions (Gardener,

Lawinternational financial market Essay Example | Topics and Well Written Essays - 4000 words

Lawinternational financial market - Essay Example It would not be wrong to say that in the first initial phase of this internationalization of the financial market, the main problems that were faced by those involved are more noticeable than the remuneration it gave to all. If we really come to discuss the true picture, then one very vital character of the market then was the restrains and slothful augmentation in Europe during the year 1990 and even some time after that .The Year 1997 and 1998 marked the dawn of the Asian predicament. Regardless of these happenings which came forth as challenges to the international financial markets and the parties involved therein. The true essence of the international trade, on the other hand lengthened at a very swift speed, plateful to authority constant swift economic development in lots of up-and-coming markets and also emergent countries. By the side of the identical moment in time, the developments in that of international finance include not anything that cannot be deemed as anything lesser than being short of avant-garde. Along with the increase in the across border assessment of financial transactions. The increasing trend in the international market has taken up a swifter pace at a very fast yet very meaningful way. Also the markets have evolved into them the characteristics of ground-breaking fresh risk transfer instruments. These Risk transfer Instruments also include the various different kinds of Derivative securities. Along with these come along the novel financ ial institutions. Ever since the beginning of the year 2002, the reimbursement of this phase of globalization has turn out to be further perceptible. International intensification has with determination exceeded agreement prospect, and also it has been very deranged. The emergence and development of new-fangled risk transfer markets-those are derivative securities-has aided the process of spreading risk additionally largely along with supplementary precision. This, investors are capable of scheming their risk profile with a great deal superior effectiveness than in the past. Only if triumphant, these changes should be able to facilitate the rising of the global augmentation resulting in making the economy a more should have helped to raise global growth and to have made the economy more elastic as well as more and more supple. To be in no doubt, the financial improvement and internationalization also tag's along loads of challenges within them. These have also aided the development of the tasks of administrative and authoritarian powers that are increasingly considered to be multifarious. They