measles :: essays research papers

Measles Virus   Ã‚  Ã‚  Ã‚  Ã‚  In the 1800’s the measles was a very dangerous disease, and when people who come in contact with it will die, if they have never been exposed to the virus before. The measles is transmitted through the air. The way that the virus is transmitted is that infected droplets are released by coughing, sneezing, and by talking. When the infected droplets that contain the measles are in the air, they are taken into the body through the mouth, nose and eyes of the potential person that could get the virus. People with low respiratory tract, which is the lungs and bronchi, are more likely to get the infection. During the next two to four days after the infection penetrates the body, the measles virus replicates in the respiratory cells and then spreads to the draining lymph nodes, where it reproduces again. Then it moves into the blood stream, carried by the white blood cells. This results in the virus being carried all over the body, which leads to infecting other p laces inside the body. During this time, the infected person feels fine and the measles infection and incubation stages are very unnoticeable. The next stage of the measles happens after eight to twelve days. The infected person has symptoms of fever, weakness and loss of appetite. Coughing and running of the eyes and nose are also seen. Now the infection is spreading all over the tissues through out the body. They also trigger the body’s immune system, which causes the symptoms. When the measles virus infects the immune system and interacts with the antibodies and T cells, a measles rash begins on the face and very quickly spreads to the body, arms and legs. The fever and cough become more intense after the fifth day. The rash turns into 3-4 mm red maculopapular lesions, which are flat and slightly raised. Pretty much this virus starts on the face, behind the ears, and moves downward all over the body. After awhile the rash begins to disappear, but the immune system is still weak. Making people who were infected with the measles more prone to other infections, making the immune system more susceptible to become infected, which in the early days of the measles caused many deaths.   Ã‚  Ã‚  Ã‚  Ã‚  With the growth of medical technology and research, a measles vaccine was produced. It is given to children before the age of four, and the measles infection is on the decline.

Economics of All You Can Eat Buffets

The notion of paying one set cost for ‘unlimited' quantities of a good or service is certainly appealing, and that appeal is exactly what all-you-can-eat (AYCE) restaurants take advantage of. Gobi Brighton, an all-you-can-eat barbeque restaurant in England, offers unlimited servings of Asian and Middle-eastern foods for one fixed price of 12 pounds. Of course, no customer will actually eat an infinite quantity.Taking this factor into account, and given the various costs the restaurant must pay to deliver the service, this fixed price that consumers pay is determined such that the restaurant will profit in the long-run despite the quantity customers individually eat. Andy and George, however, two middle-aged men who frequently visit this AYCE restaurant, were recently kicked out and banned from Gobi Brighton because, according to the manager of the restaurant, they were â€Å"[eating] the restaurant out of business† (Dartford 2012).While it is certainly possible that busi ness may not be so great for Gobi Brighton these days, whether two customers can be blamed for it or not is another question. This paper will analyze the economic principles of AYCE restaurants and determine if it was possible for Andy and George to have been actually eating Gobi Brighton â€Å"out of business† with their appetite for Asian and Middle-eastern food. Buffets, or AYCE restaurants, can be very profitable because costs paid by the restaurant are much lower compared to those of an a la carte restaurant.Customers are given plates and head to the food counters to get whatever they like instead of ordering from a menu. Consequently, these restaurants have little need for waiters, and thus have less demand for them compared to other restaurants. Furthermore, because food is prepared in large quantities at a time as opposed to being prepared non-stop and on-demand, there is also a lower demand for cooks. On the other hand, buffets require continuous upkeep to ensure foo d safety and presentable aesthetics.Overall though, labour costs for AYCE restaurants are much lower compared to those of other restaurants. Because buffets have reduced production costs, they can afford to charge less to consumers if it means getting more business. Some restaurants use this strategy, but most choose not to because it doesn't lead to profit-maximizing results. Instead, AYCE restaurants take advantage of the law of diminishing marginal utility and how it plays a key role in any customer's ability to consume at a buffet.The manager knows that each additional plate of food provides less utility, or less satisfaction, than the one before. As a result, most people will eat only until the utility derived from an additional serving of food is slightly lower than the utility gained from the first dish. Buffets generate a profit by charging a price which is above the price of the food that the average customer consumes. This strategy assumes that, before the customer consume s a quantity of food where the total cost to the firm is greater than the price of the buffet, their marginal utility will be zero.This expectation was not met in the case of Andy and George. People who go to buffets usually fall into one of two categories of AYCE customers. One group eats regular portions and does one, maybe two trips to the buffet station. These customers are unlikely to eat a value equal to or above the fixed price they paid for the buffet, and thus contribute the most to the accounting profits of AYCE restaurants. The second group of buffet customers consist of over-eaters. They enter a buffet with the intention of getting their value's worth, if not more, of food.These customers are usually familiar buffets and their own capacity for food, and are confident heading into the restaurant because they are certain that they are getting a good deal. These kinds of buffet customers are more likely to consume a quantity of food that is of greater value that of the buff et price. It is here that we find Andy and George, the two over-eaters that were eating Gobi Brighton out of business. After Andy and George paid their 12 pounds, they sat down and each downed five bowls of stir fry before getting kicked out.If the manager was being honest when he said these two customers were putting him out of business, that would mean that those five bowls of stir fry caused the restaurant to go from making accounting profits, where revenue exceeds production cost, to making no profits whatsoever, where revenue equals production cost. Is it possible for ten bowls of stir fry to put this restaurant out of business? One bowl of stir fry these days never costs more than 5 pounds to the producer (Taste 2011).Since Andy and George collectively consumed ten bowls of stir fry, we can assume that up until they were kicked out of the restaurant, the business of the two men cost the restaurant fifty pounds. Beforehand, they each paid 12 pounds for the buffet service, so th e restaurant received 24 pounds as revenue. Consequently, without taking other production costs into account, Gobi Brighton was making a negative accounting profit of 26 pounds. This means that before Andy and George even entered the restaurant, Gobi Brighton was at least 26 pounds away from being unable to sustain its own service.If Gobi Brighton was a perfectly competitive firm in a perfectly competitive industry, then the restaurant has little say in the price because they take whatever price is established by the market equilibrium, and this would explain the poor business (see Figure 1). Raising the price, even by a little, would result in the customers going elsewhere and they would lose all their sales, as shown in point A. Lowering the price to point B, would also be ineffective because they can only sell as much as they can produce, which is a fixed quantity.They would lose even more capital, especially for a buffet service where, theoretically, an infinite quantity of food is being offered. Thus, in a perfectly competitive industry, Gobi Brighton would be forced to continue selling their buffet service at a market price of 12 pounds. Perfect competition could explain how Gobi Brighton was going out of business because of these two men, and thus had to resort to kicking the men out of the restaurant. The fact is, however, that Gobi Brighton is far from being a perfectly competitive firm in a perfectly competitive industry.Buffet prices are not fixed, not all buffets are the same, and buyers and sellers do not have complete information about service. In fact, according to Yelp, Asian and Middle-eastern restaurants are not that common in England, so the restaurant could have raised it's price for a short while, or tried reducing costs by laying off a worker or two since business was clearly not doing so well to begin with (Yelp 2012). Gobi Brighton is an all-you-can-eat restaurant located in Brighton, England that recently kicked out two customers for e ating too much and claimed they were putting the restaurant out of business.Not only does common buffet pricing strategies suggest it is very unlikely that two over-eating customers alone could do this, but Gobi Brighton could have improved business a number of ways since it isn't a perfectly competitive firm. Perhaps instead of marketing itself as an all-you-can-eat restaurant, Gobi Brighton may want to consider switching to an a la carte service, especially if they feel like their business is threatened by the very demographic that buffet restaurants appeal to most.

Suicide Death Of The United States - 2008 Words

Suicide is the 10th leading cause of death in the United States. There are approximately 121 successful suicides a day, and 44,193 a year. Almost 50% of suicides are committed with a firearm. Seven out of ten suicides are committed by white middle aged men. It is proven that men die from suicide 3.5 times more than women; however, it is documented that women try three times more. Over the past 17 years’ suicide rates have increased steadily. Suicide rates are higher in people who are 34 and older. Whites currently hold the highest suicide rate. The most popular form of suicide is with a firearm it accounts for 49.8%. Second is suffocation at 26.8%, then poisoning at 15.4%, and other at 7.9%. No count is kept for people who attempted†¦show more content†¦Altruistic suicide occurs when there are dramatic social forces. An example would be a plane crash, the people who commit suicide feel that they are doing it for the better of their organization or themselves. A few re al-life examples of this would be 9/11, the Pulse night club shooting, and the Sandy Hook Elementary shooting. Egoistic suicide occurs when a person feels detached from society. Many elderly people who live in nursing homes feel detached from society. They went from cooking, cleaning, and going to work every day to not having a say in what they do or when they see their family. For some people this is too much and they become suicidal. Fatalistic suicide occurs when people feel that they have no control over their world. An example would be when Trump was elected president, for some people this would have been too much to handle and it would have put them over the edge. Another example could be a prisoner, if someone is on death row and they have sat there for twenty plus years, sometimes they would rather die than sit there another day. Depression can also be a cause of someone being suicidal. There are many causes for depression including mental illness, loss of a loved one etc.. .. When someone is depressed a chemical change in their brain. In other words, it is not something you can just wake up and get over, 10% of people will experience depressionShow MoreRelatedThe Death Of The United States Suicide Essay2229 Words   |  9 PagesJackson State University November 28, 2016 HISTORY In the United States Suicide is the 10th leading cause of death. Each year 42,773 Americans die by suicide. Suicide costs the U.S. $44 Billion dollars annually. The annual age-adjusted suicide rate is 12.93 per 100,000 individuals. Men die by suicide 3.5x more often than women. On average, there are 117 suicides per day. White males accounted for 7 of 10 suicides in 2014. Firearms account for almost 50% of all suicides. The rateRead MoreThe United States Of America1536 Words   |  7 PagesThe United States of America is well known throughout the world for tis democracy ant the freedoms of its citizens. Since declaring its Independence from Great Britain rule in 1776, the United States of America has undergone a continuous effort to maintain law and order. In order to create a strong federal government with a system of check and balances the Constitution was proposed and ratified. The Constitution of the United States became the Supreme law of the land. (The Constitution) We t heRead MorePersuasive Essay On Gun Control1086 Words   |  5 PagesAmericans will be shot dead today. It is the 12th leading cause of death in the United States. According to a recent study, the gun homicide rate in the United States is 25 times higher than in other wealthy countries (guardian.com). Sadly, most Americans are divided on whether the country should enforce stricter gun laws. Many, especially the Liberals, feel as though having firmer gun laws would significantly reduce the number deaths caused by gunshot. In contrast, the Conservatives feel that passingRead MoreThe Centers For Disease Control And Prevention Released1181 Words   |  5 PagesDisease Control and Prevention released a suicide report in 2015 stating that in The United States, suicide is the 10th leading cause of deaths. As many as 44,193 individuals have died per year, which means there is about 123 suicide deaths a day happening as of now in The United States (â€Å"Suicide Statistics†). This is only the statistics of deaths that have been successful in The United States, it is not counting all suicide deaths around the world nor suicide attempts. This alone is already a majorRead MoreThe And Target : Reduce Suicide Rates1431 Words   |  6 Pages LHI and Target: Reduce suicide rates from 11.3 to 10.2 per 100,000 population Target Population: Montana residents 5-14 years old Determinants: Age group, sex, race/ethnicity, geographic location The Centers for Disease Control and Prevention (CDC) National Vital Statistics reported that Suicide was the 10th leading of cause of death within the United States in 2013, accounting for approximately 41,149 deaths per year or 112 deaths per day (Centers for Disease Control and PreventionRead MoreAssisted Suicide Is Not Common For All Areas Throughout The United States890 Words   |  4 PagesAssisted Suicide Imagine being diagnosed with a life-ending disease and experiencing such excruciating pain that doctors say cannot be healed. Pain is a terrible thing to experience, especially when it is permanent. What can be done to relieve that pain? What if the only option to rid the pain from the patient is death? No one knows how that feels until it happens to them, that is why assisted suicide is used. Assisted suicide is a practice throughout most of the United States that terminatesRead MoreWhat Is The Total Population In The City Of Murphy, Texas?1628 Words   |  7 Pages, 2017.) and the â€Å"United States population as of today, October 3, 2017 of 326,102, 454† (Bureau, U.C., 2017). There was data for The State of Texas on the United Census Bureau’s website, for July 1, 2016, but there was not a comparison for Murphy, Texas so the last comparison was April 1, 2010. As of April 1, 2010, there were â€Å"9.6% of children under the age of five years old in the City of Murphy, Texas and 7.7% in the State of Texas† (Bureau, U.C., 2017.). â€Å"The United States report stated â€Å"6.5%Read MoreSuicide During The United States781 Words   |  4 PagesIn 2014, suicide was the tenth leading cause of death overall in the United States. According to the National Institute of Mental Health (NIMH, 2015), there were twice as many suicides than there were homicides. Suicidal ideation (SI), defined as an individual thinking about, considering, or planning their suicide, is established before the act of committing suicide. Research suggests that adverse childhood experiences (CDC, 2015) will put an individual at risk for developing a mental illnessRead MoreShould Physician Ass isted Suicide Be Legal?847 Words   |  4 PagesShould-Physician Assisted Suicide Be Legal In Every State When it comes to the topic of, should physician-assisted suicide be legal in every state, most of us will readily agree that it should be up to a terminally ill person to make that decision. Whereas some are convinced that it is inhumane, others maintain that it is a person’s decision to end their own life. I agree that physician-assisted suicide should be legal in every state because in most cases, people that are terminally ill should haveRead MoreCauses of Suicide Essay1617 Words   |  7 PagesCauses of Suicide *No Works Cited Suicide can best be described as the destructive act of voluntarily taking ones own life. Suicide often presents a real and often tragic puzzle to be solved by friends and family, and any other professionals who have been involved with someone who has committed suicide. To be able to definitively answer the question as to why an individual would commit such a deadly act seems to be a highly complex task. The victim himself

Dark Money Definition

Anyone whos paid attention to all those mysteriously funded political ads on television during the 2012 presidential election is probably familiar with the term dark money. Dark money is a term used to describe political spending by innocuously named groups whose own donors - the source of the money - are allowed to remain hidden because of loopholes in disclosure laws. How Dark Money Spending Works So why does dark money exist? If there are Federal Election Commission rules requiring campaigns to report their sources of funding, how can it be that some of the money spent on trying to influence elections is coming from unnamed sources? Most of the dark money making its way into politics comes not from campaigns themselves but outside groups including nonprofit 501[c] groups or social welfare organizations that are spending tens of millions of dollars. Those groups are required to report how much they spend trying to influence elections. But under the Internal Revenue Service code, 501[c] and social welfare organizations are not required to tell the government or public from whom they get their money. That means they can spend money on electioneering or make contributions to super PACs without naming names of individual donors. What Dark Money Pays For Dark money spending is very similar to spending by super PACs. 501[c] and social welfare organizations can spend unlimited amounts of money trying to sway voters on specific issues and thereby influence the outcome of elections. History of Dark Money The explosion of dark money followed the U.S. Supreme Courts landmark 2010 ruling in the case of Citizens United v. Federal Election Commission. The court ruled that the federal government cannot limit corporations - including those 501[c] and social welfare organizations - from spending money to influence the outcome of elections. The ruling led to the creation of super PACs. Dark Money Examples Groups that spend money on trying to influence elections without having to disclose their own donors appear on both sides of the political spectrum - from the conservative, anti-tax Club for Growth and U.S. Chamber of Commerce to the left-leaning abortion-rights activist groups Planned Parenthood Action Fund Inc. and NARAL Pro-Choice America. Dark Money Controversies One of the biggest controversies over dark money involved the 501[c] group Crossroads GPS. The group has strong ties to former George W. Bush adviser Karl Rove. Crossroads GPS is a separate entity from American Crossroads, a conservative super PAC funded by Rove that was sharply critical of President Barack Obama in the 2012 election. During the campaign, the groups Democracy 21 and the Campaign Legal Center asked the Internal Revenue Service to investigate Crossroads GPS after the 501[c] group received an anonymous $10 million contribution. J. Gerald Hebert, executive director of the Campaign Legal Center, wrote: The new $10 million secret contribution to Crossroads GPS to run attack ads against President Obama as he runs for re-election is a stark illustration of the problem caused by groups engaged in campaign spending claiming eligibility as social welfare organizations under section 501(c)(4). It is apparent that these groups are claiming section 501(c)(4) tax status in order to keep secret from the American people the donors financing their campaign-related expenditures. If these organizations are not eligible for tax status under section 501(c)(4), then they are improperly using the tax laws to shield their donors from public disclosure and improperly using secret contributions to influence the 2012 national elections. Crossroads GPS reportedly spent more than $70 million from anonymous donors on the 2012 election even though it had previously told the IRS political spending would be limited in amount, and will not constitute the organizations primary purpose. Dark Money and Super PACs Many advocates for transparency believe spending by 501[c] and social welfare organizations is much more problematic than that by super PACs. We are seeing some 501c4s becoming pure election vehicles, wrote Rick Hasen on the Election Law Blog. ...The key is to stop 501c4s from becoming shadow super PACs. Yes, campaign finance reform community, it has become this bad: I want more super PACs, because the 501c4 alternative is worse!

The Production Possibilities Frontier - 1083 Words

1. A reduction in trade barriers has two effects on the economy. The production possibilities frontier will move outward, and the economy will move closer to the production possibilities frontier. Both outcomes are related. Freer trade creates more markets for the country for its goods and services. This allows companies to produce more, but it does not directly change the production capacity of the nation. Thus, the economy moves closer to the production possibilities frontier (Rittenberg Tregarthen, 2009). The reason that the production possibilities frontier also moves owes to the theory of comparative advantage. Freer trade allows the country to focus production on those goods and services in which it has comparative advantage. Thus, the economys production becomes more efficient. Given that the factor resources (people, capital) have not changed, an increase in efficiency will push the production possibilities frontier outward. This is because the total capacity is going to be higher. Note that there is a difference between producing the same things more efficiently, and producing goods that are more efficient. The total capacity of the economy is changed when the mix of product and services is changed, marking a shift in the curve to go along with moving production closer to the curve. In addition, trade encourages technological transfer. Firms in each country learn from one another, and the transfer of knowledge and technology is one way that this occurs.Show MoreRelatedProduction Possibility Frontier ( Ppf ) Essay952 Words   |  4 Pages1. Production Possibility Frontier (PPF) is a graph that shows the potential combinations of goods that an economy is able to produce given available technology and factors of production. ïÆ'Ëœ Its slope is negative, shape is concave or bowed, points inside are inefficient, a point on the PPF are efficient and attainable, point above are unattainable and also require economic growth. ïÆ'Ëœ Economic growth is achieved by increasing the economics’ growth, ability to produce. 2. Opportunity cost is theRead MoreSynopsis Of A Production Possibility Frontier Essay2644 Words   |  11 PagesSubmission Date: 02-08-2014 ANSWERS 1) A- A production possibility frontier (PPF) is a curve or a state line which shows the Combinations Of two or more goods and services that can be produced at the one time by Using all of Resources efficiently of the available factor (Geoff Riley,2012). Graphically bounding the production set for fixed input quantities, the PPF curve shows the Maximum possible production level of one commodity for any given production level of the Other, given the existing stateRead MoreMicroeconomy Homework1744 Words   |  7 Pagesboth countries D) good Y is the same for both countries Production Possibilities Frontier Questions 16 to 18 refer to the figure below 16) Point C on the production possibilities frontier in the above figure illustrates A) a point that achieves production efficiency B) a combination of goods and services that cannot be produced efficiently C) a point that achieves greater production efficiency than point A and B D) a production point that underutilizes resources 17) In the above figureRead MoreOpportunity Cost750 Words   |  3 Pagesconsidered opportunity costs. Now lets look at Opportunity Cost from the point of production. Opportunity costs may be assessed in the decision-making process of production. If the workers on a farm can produce either one million pounds of wheat or two million pounds of barley, then the opportunity cost of producing one pound of wheat is the two pounds of barley forgone (assuming the production possibilities frontier is linear). Firms would make rational decisions by weighing the sacrifices involvedRead MoreProduction Possibilities Frontier - American And Japanese Workers Essay1381 Words   |  6 PagesProduction Possibilities Frontier – American and Japanese Workers America and Japan have both been major importers and exporters of goods in the global economy for many years. In an example below, a production possibilities frontier, which is described by N. Gregory Mankiw a Professor of Economics at Harvard University and Author of Principles of Macroeconomics as â€Å"a graph that shows the combinations of output that the economy can possibly produce given the available factors of production and theRead MoreUsing The Production Possibilities Frontiers For Women And Men Provided1283 Words   |  6 Pagesâ€Æ' Name: Instructors Name: Course: Date Due: Question 1 Using the production possibilities frontiers for WOMEN and MEN provided below, explain which group has a comparative advantage over which type of Goods. Men earn and continue to earn higher incomes than women and thus have a comparative advantage over women. Women have a comparative advantage over men on Childcare and can be justified by their specialization in household chores. Not only does the scientific reasoningRead MoreQuestions On Business Economics And The Production Possibilities Frontier As A Result Of Workers Moving From Their Domestic Countries1837 Words   |  8 PagesNAME STUDENT ID MANPREET SINGH K150361 DEVINDER SINGH K140882 EXECUTIVE SUMMARY The report deals with issues that arise in the production possibilities frontier as a result of workers moving from their domestic countries to foreign countries for better work opportunities. Major focus of this report is on change in PPF curve due to emigration and how production is being affected due to it. The main issues discussed in the report are how change in technology or resources mediate PPF curve outwardRead MoreInternal Auditor Essay1103 Words   |  5 Pagesspent at university including all fees * b) the benefit gained from having a university degree c) dollar value of all alternatives d) the next best alternative of the money spent Q4 Which of the following is NOT a factor of production? a) land b) labour * c) a financial asset d) capital Q5 An economic model indicates that a rise in income will result in consumers purchasing fewer fast food meals, ceteris paribus. â€Å"Ceteris paribus† means Read MoreQuestions On Problems And Applications1473 Words   |  6 Pagesand explain a production possibilities frontier for an economy that produces milk and cookies. What happens to this frontier if disease kills half of the economy s cows? Image Since cows are not being used to make cookies, than cookies can still be produced in this economy and would not change if half the cows died. But milk production would be affected. 7. Use the production possibilities frontier to describe the idea of efficiency. The production possibilities frontier shows the efficientRead MoreAssignment 11688 Words   |  7 Pagesdisease. invest more money in health research. Table 1 You own a pizza shop called Pizzas Us. Currently you are paying your cooks an hourly wage of $20. You sell a medium pizza for $10 a pie. By hiring more cooks, you can increase your pizza production as shown in the following table. 4. a. b. c. d. 5. a. b. c. d. Refer to Table 1. If you operate one hour every day what is the marginal cost of the 3rd cook? 10$ 20$ 40$ 60$ Refer to Table 1. How many cooks should you hire to maximize your net benefit

Journal Innovative Research In Electrical -Myassignmenthelp.Com

Question: Discuss About The Journal Innovative Research In Electrical? Answer: Introduction An AC system is made up of a lot of components and based on their load consuming nature they can be classified as capacitive, resistive and inductive. In case of purely resistive load the current and voltage are in phase but most of the loads connected in any facility is inductive in nature and in case of inductive loads the current lags the voltage and is therefore out of phase whereas, in case of capacitive load the current leads the voltage (Stokes, 2008). The current which is leading or lagging the voltage is called wattles current because it supplies reactive power and this power is essential for turning motors attached to the AC system (Stokes, 2008). So this type of load cannot be avoided and if this type of load increases then the accounting power requirement increases which in-turn increases the kVA demand for the same kW load (Stokes, 2008). Most of the high tension tariff charge a separate kVA charge along with the kW charges which increases the electricity bill of the con sumer (Stokes, 2008). Thus consumers having low power factor have to pay more for the useful power they use making power factor improvement a necessity. Some of the methods applied to improve power factor in a system are as follows: Capacitive power factor improvement could be easily implemented as they are capable of supplying the reactive power required by the load by connecting the capacitor bank in parallel to the inductive load (Turchi et al., 2014). The capacitor bank acts like a source of reactive power and thus the inductive load absorbs lower reactive power from the AC system thus reducing the phase difference between the current and voltage. Power factor improvement using Synchronous Condenser is another method where a three phase overexcited synchronous motor working under no load is connected to the load side of the inductive load (Turchi et al, 2014). Synchronous condenser financial like a capacitor by either supplying reactive power or by drawing lagging current from the AC supply. Phase advancer is an AC exciter which could improve the power factor of induction motor (Turchi et al., 2014). It is connected to the rotor circuit of the induction motor and is mounted on the shaft of the induction motor (Turchi et al., 2014). The flux required a slip frequency needs exciting ampere turns and the phase advancer supplies this ampere turn and thus improves the power factor. As seen above most of the methods stated above work similar to a capacitor so as to improve the power factor and therefore capacitor banks are mostly used in power factor improvement. Another advantage of using capacitors in power factor improvement is that they are readily available in different sizes and shapes and are cheaper than other methods used to improve power factor. Therefore, capacitor banks are widely used in the application of power factor improvement. This papers briefly reviews the work carried out in improving the power factor using capacitor banks. Improvement in power factor has certain advantages as follows (Natarajan, 2005): As energy efficiency improves the power consumption reduces which results in reduced fossil fuel usage and greenhouse gas emissions form the power stations. Electricity bills are reduced. The existing supply can deliver more kVA. Losses in distribution equipment and transformers are reduced. The voltage drops in long cables are reduced. The electrical burden on electrical components are also reduced. An assembly of number of capacitors is a capacitor bank and are used to generate kVAr in-order to improve power factor (Ramzan et al, 2016). Arrangements of series/paralleled connected units are called Shunt capacitors banks. Some of the types of capacitor banks used in power factor improvement are discussed below. Grounded Wye - Connected Capacitor Banks (Natarajan, 2005): They are made out of parallel and series arrangement of capacitors in each stage, providing a low impedance path to ground. They make a low-impedance way to ground giving innate self-insurance to lightning surge streams and some security from surge voltages consequently, working without surge arresters. They offer a low impedance way for high recurrence streams thus they can be utilized as channels in frameworks. In any case, the dissemination of inrush streams and music may cause fizzling and over operation on defensive transfers and wires. Ungrounded Wye - Connected Capacitor Banks (Natarajan, 2005): They don't allow substantial capacitor release streams, third consonant ebbs and flows or zero succession ebbs and flows amid framework ground deficiencies to stream. Other favourable position is that over voltages showing up at the present transformer optional may not be as high as on account of grounded banks if the nonpartisan is protected for full line voltage. Be that as it may, it is costly for banks over 15 kV. There are two classes of associating capacitor bank. They are shunt and arrangement associating. Among these two classifications, shunt capacitors are all the more generally utilized as a part of the power arrangement of all voltage levels (Chandra and Agarwal, 2014). There are some particular points of interest of utilizing shunt capacitors, for example, Reduced line current of the framework. Improved voltage level of the heap. Reduced framework misfortunes. Improved power factor of the source current. Reduced heap of the alternator. Reduced capital speculation per megawatt of the heap. All the previously mentioned benefits originate from the way that the impact of capacitor lessens responsive current moving through the entire framework. Shunt capacitor draws practically settled measure of driving current which is superimposed on the heap current and therefore diminishes responsive segments of the heap and consequently enhances the power factor of the framework (Miller, 1976). Arrangement capacitor then again has no influence over stream of current (Miller, 1976). As these are associated in arrangement with stack, the heap current dependably went through arrangement capacitor bank. The capacitive reactance of arrangement capacitor kills the inductive reactance of the line henceforth, lessens, viable reactance of the line. Power factor correction is accomplished by supplementing a capacitive or inductive circuit with a reactance of inverse stage (Andrews et al, 1996). For a normal stage slacking power factor stack, for example, a vast enlistment engine, this would comprise of a capacitor bank as a few parallel capacitors at the power contribution to the gadget. Low power factor is not that quite a bit of issue in private homes it does however turn into an issue in industry where numerous expansive engines are utilized. So there is prerequisite of remedying the power factor in industry. Low power factor is not acknowledged according to standard since poor or low power factors influence the expenses of both the buyers and the electrical power industry. In-spite of the increased cost of working, reactive power requires the utilization of transmission lines, transformers, circuit breakers, switches and wiring of higher current limits. By utilizing a PLC based capacitor bank framework we can enhance slacking power factor consequently framework will be protected from various burden of slacking power factor by utilization of this framework the power factor control turns out to be quick and exact than different techniques and likewise the electric charges are additionally diminished (Desai et al., 2015). The info waveform of voltage and current with stage distinction are bolstered to zero intersection finders, which give square waves in advanced organization. These advanced waveforms are utilized by microcontroller to compute power factor. Microcontroller takes choice to s witch suitable capacitor bank to make up for power factor. In the wake of identifying poor power factor, automatic power factor control framework switches one capacitor at any given moment out of a gathering of eight capacitors (Tiwari and Sharma, 2014). On the off chance that expected objective to accomplish power factor is met, at that point next cycle rehashed else exchanging of capacitor proceed till pay is not under control. Before the genuine execution of the automatic framework in genuine physical world, we can confirm the evidence of idea utilizing Proteus VSM (Sarkar and Hiwase, 2015). The power factor correction an additionally be done utilizing solid state switched capacitors Measuring the power factor from the heap by utilizing LM358 zero intersection circuit and CD4070BC stage move indicator, and afterward computing the power factor have been finished by the program and LCD will be utilized for show. On the off chance that the power is not in the range, the switches are on/off modelled by the controller unit and capacitors are initiate/deactivate and enhance the power factor (Popa et al, 2013). This framework gives usage done on Arduino UNO microcontroller utilizing C language software to program the microcontroller, Arduino program to decide time slack amongst current and voltage and Proteus 7.7 to mimic the power factor as indicated by the heap. Solid state switches are electronic exchanging gadgets that can work on or off positions when a little outer voltage is connected from the microcontroller (Than, 2016). In AC circuits, solid state transfers switch on at zero load current. The circuit cannot be stopped by a sine wave crest, holding the expansive transient voltages that would cause a sudden fall of the attractive field around the inductance and is known as zero-hybrid exchanging. Many focal points show up by utilizing the solid state switches in this framework. There is thinner profile, allowing quieter operation and switching which is quicker than electromechanical transfers; the exchanging time of an ordinary optically coupled SSR is in the range of microseconds to milliseconds depending on the time required to power the LED on and off. It has no moving parts to wear and no contacts to pit or develop carbon. Yield resistance stays steady in any case measure of utilization. It is significantly less delicate to working and capacitance conditions like, mugginess, vibration, mechanical stun and outer attractive fields. Power Factor Control System with solid state switched capacitor when actualized totally, will accommodate power factor change in low voltage framework. Arduino UNO controller is exceptionally prominent at this occasion, in like manner effectively to compose the program by utilizing the abnormal state language. By the utilizing of solid state switches, it can contrast and the mechanical transfers, such a significant number of dependable and productive results show up. This is the extremely effective framework for different burdens, by utilizing the distinctive sizes of capacitors and setting off the switches which were controlled by the program. In automatic power factor correction framework, we utilize potential divider circuits rather than customary zero intersection locator which gives a steadier power factor and the cost additionally get chop down in light of the fact that we don't have to utilize ICs (Utpal et al, 2016). Microcontroller usage reduces the expenses. Because of utilization of microcontroller numerous parameters can be controlled and the utilization of additional hard products, for example, clock, RAM, ROM and information yield ports lessens. Overcorrection should be avoided as current and voltage are usually more because of which the power framework or machine winds up plainly precarious and the life of capacitor banks diminishes. A PLC is a solid state modern PC that controls framework by persistently checking the state of info gadgets and settling on choices in view of foreordained program so as to control the state of yield gadgets (Vukojevic et al, 2015). The essential monotonous strides in the operation of all PLCs, incorporate, filtering the contribution, amid which the state of the considerable number of sources of info associated with the PLC is examined (Jain et al, 2016). Using Program Scan, PLC checks and executes the program rationale in a successive way, producing the yield states. Amid the Output Scan the created yield states are refreshed in the yield status registers to invigorate or de stimulate the yields gadgets that are associated with the PLC yield module. Housekeeping incorporates inward diagnostics, correspondence with programming terminals, and so forth. Evaluations There are various routes in which a capacitor bank might be associated, with the decision being reliant on the coveted hand-off security, the framework establishing, the kVAr limit of the bank and the voltage level of the framework. At first the individual capacitor units are chosen to meet the voltage necessities of the framework, at that point the quantities of parallel units are chosen to meet the kVAr requirements of the capacitor bank (Chen et al, 2010). The number of paralleled capacitor units in each stage depends on two criterions as follows: If one capacitor unit in a stage fails then it should not create a voltage drop of more than 110 percent of the evaluated voltage. If a unit fails, then adequate fault current should flow through the individual circuit to clear the fault within 300s or less. Attention should be provided to this 300s time traverse as it is most extreme, and it should be toned down to 30s of traverse time. The highest number of parallel connected capacitor units for each arrangement bunch is represented by an alternate thought. At the point when a capacitor unit comes up short, different capacitors in a similar parallel gathering would contain some charge, which would then deplete off as a high-recurrence transient current moves through the damaged unit and its breaker. This transient current has to be withstood by the breaker holder and the fizzled capacitor unit. The over-voltage induced when a capacitor unit is separated increases the quantity of capacitor units per arrangement. Failure of extra capacitors is well on the way to happen in a similar arrangement bunch as the primary failure, as they have the most elevated voltage push. Every capacitor unit is normally secured by a breaker, remotely mounted between the capacitor bank intertwine transport and the capacitor unit (Locke, 2000). With inside melded capacitors, when a capacitor pack or component falls flat, the present, through its separate fusible connection, will be extensively higher than the ordinary current and may blow the fusible connection, in this way confining the fizzled pack or component. If a wire blows in a capacitor bank, it would expand the central recurrence voltage happens on the rest of the units in that arrangement gathering. An unbalance location conspire is utilized to screen such conditions and to make a move as required (Shwedhi and Sultan, 2000). This plan more often than excludes three levels of activity. Over-voltage should be less than 110% which should be indicated using an alarm. The postponement is normally 4s or more prominent. Over-voltage greater than 110% requires Trip capacitor bank exchanging gadget as the unbalance is increased. The deferral is typically 4s or more noteworthy. Trip for extreme bank unbalance should provide fast wire clearing time with lower postponement frequency of 0.3 to 0.5s. Unbalance insurance regularly gives the essential security to arcing flaws inside a capacitor bank and different variations from the norm that may harm capacitor units as well as breakers. Arcing issues may cause generous harm in a little division of a moment. The unbalance security ought to have least purposeful deferral so as to limit the measure of harm to the bank in case of outside arcing. As Switching of capacitors are done automatically consequently we get more precise outcome, Power factor correction strategies influences framework to steady and because of change in power factor its productivity likewise increments (Than, 2016).. Power factor correction plan can be connected to enterprises, power frameworks and in addition in house hold reason. The utilization of microcontroller decreases the expenses. By utilizing microcontroller different parameters can be controlled and the utilization of additional hard products, for example, clock, RAM, ROM and info yield ports decreases. Before automatic power factor correction circuit inclusion capacitors are associated in parallel to the heap circuit, so they are outlined, for example, to be associated in parallel to stack (Khan and Owais, 2016). Capacitance of capacitors include when associated in parallel, they are associated in parallel with the hand-off switch board. Underneath figure demonstrates the association of capa citor bank. Capacitors are associated in parallel to the heap circuit, so they are composed, for example, to be associated in parallel to stack. Capacitance of capacitors include when associated in parallel, they are associated in parallel with the transfer switch board. A PLC based power factor change plot is actualized to enhance the power factor under various working conditions. The power factor controller utilizes a query table made in light of the deliberate estimation of power factor as per the look table, the PLC switches the capacitor in each stage using hand-off worked switches (Jain et al, 2016). By introducing appropriately measured power capacitors into the circuit the Power Factor is enhanced and the esteem turns out to be closer to 0.9 to 0.95, therefore, capacitor banks utilized for power factor correction decrease misfortunes and expands the proficiency of the power framework and furthermore builds security (Chen et al, 2010). By utilizing an automatic power recurrence control framework, the productivity of the framework is profoundly expanded. Conclusions Utilization of PLC as a power factor controller has turned out to be an adaptable, proficient and savvy instrument for a modern application. This improves the power quality, cost and protection in the system. By utilizing power factor correction controller, we can accomplish: higher estimations of capacitors progressively the disfiguring administration, operation with little load or sit out of gear of the engine due the increase of misshaping administration, a major contrast between the power factor in distorting administration and power factor of essentials show a higher twisting administration, if the capacitors banks are associated with arrangement curls, the disfiguring is decreased on the off chance that it utilizes channel with bring down recurrence ( 2 KHz). The Mechanically Switched Capacitors (MSCs) are the most prudent responsive power remuneration gadgets. They are a basic and minimal effort, other than being low-speed answer for voltage control and system adjustment under substantial load conditions (Oliveira et al, 2010). Their usage has no impact on the short out power yet it underpins the voltage at the purpose of association. The MSCs establishments have other advantageous impacts on the framework, for example, change of the voltage profile, better voltage direction, diminishment of misfortunes and decrease or delay of interests in the transmission and era limit. Reasonably outlined capacitor banks when associated with acceptance engines can enhance the power factor among different changes in general execution. Any glitch of the capacitor bank can, notwithstanding, cause undesirable corruption of framework execution. Power supply mutilation regularly can be measured by Power Factor and Total Harmonic distortion (Das et al, 2009) The low power factor is exceptionally undesirable as it causes an expansion in current, bringing about extra misfortunes of dynamic power in every one of the components of power framework from power station generator down to usage gadgets. With a specific end goal to guarantee most great conditions for a supply framework from building and monetary point of view, it is essential to have power factor as near solidarity as would be prudent. Change of power factor influences the service organizations to dispose of the power misfortunes and the buyers are free from low power factor punishment charges. References Andrews, D. Bishop, M.T. and Writte, J.F. (1996). economics measurements, analysis, and power factor correction in a modern steel manufacturing facility. IEEE Transactions on Industrial Applications. 32(3), pp. 617-624. Chandra, A. and Agarwal, T. (2014). Capacitor Bank Designing for Power Factor Improvement. International Journal of Emerging Technology and Advanced Engineering. 4(8), pp. 235-239. Chen, Y., Yao, D., Ma, W., Pan, J., Gertmar, L., Babaee, A. and Vessel, R. (2010). Study on coordinated reactive power control strategies for power plant auxiliary system energy efficiency and reliability improvement. In: International Conference on Power System Technology. [online] Hangzhou: IEEE, pp.1-8. Available at: https://ieeexplore.ieee.org/document/5666716/ [Accessed 17 Sept. 2017]. Das, S., Das, G., Purkait, P. and Chakravorti, S. (2009). Anomalies in harmonic distortion and Concordia pattern analyses in induction motors due to capacitor bank malfunctions. In: International Conference on Power Systems. [online] Kharagpur: IEEE, pp. Available at: https://ieeexplore.ieee.org/document/5442656/ [Accessed 17 Sept. 2017]. Desai, S., Lalpurwala, N. Salokhe, V. and Katre, R. (2015). Power Factor Correction for 1 Phase Induction Motor Using PLC. International Journal of Electrical and Electronics Research. 3(2), pp. 1-4. Jain, R., Sharma, S., Sreejeth, M. and Singh, M. (2016). PLC based power factor correction of 3-phase Induction Motor. In: International Conference on Power Electronics, Intelligent Control and Energy Systems. [online] Delhi: IEEE, pp. 1-5. Available at: https://ieeexplore.ieee.org/document/7853637/ [Accessed 17 Sept. 2017]. Khan, M.B. and Owais, M. (2016). Automatic power factor correction unit. In: International Conference on Computing, Electronic and Electrical Engineering. [online]. Quetta: IEEE, pp. 1-6. Available at: https://ieeexplore.ieee.org/document/7495239/ [Accessed 17 Sept. 2017]. Locke, C. (2000). Optimal capacitor sizing for induction motors. In: Canadian Conference on Electrical and Computer Engineering. [online]. Halifax: IEEE, pp.1162-1166. Available at: https://ieeexplore.ieee.org/document/849646/ [Accessed 17 Sept. 2017]. Miller, F.D. (1976). Application guide for shunt capacitors on industrial distribution systems at medium voltage levels. IEEE Trans. Industry Applications. 12(5), pp. 444 459. Natarajan, R. (2005). Power System Capacitors. Boca Raton: Taylor Francis. Oliveira, A.L.P. and Pereira, A.L.M. (2010). Introduction of the Mechanically Switched Capacitors (MSCs) application on Power Transmission Systems. In: IEEE/PES Transmission and Distribution Conference and Exposition. [online] Sao Paulo: IEEE, pp. 452-457. Available at: https://ieeexplore.ieee.org/document/5762921/ [Accessed 17 Sept. 2017] Popa, G.N., Dinis, C.M. and Paliciuc. (2013). On the use of low voltage power factor controller in deforming regime. In: International Symposium on Electrical and Electronics Engineering. [online] Galati: IEEE, pp. 1-6. Available at: https://ieeexplore.ieee.org/document/6674332/ [Accessed 17 Sept. 2017]. Ramzan, N., Akbar, A., Khan, Z.J., Naseer, P. and Zaffar, N. (2016). Reactive power compensation through synchronization of networked VFDs. In: Power Systems Conference. [online] Clemson: IEEE, pp.1-7. Available at: https://ieeexplore.ieee.org/document/7462862/ [Accessed 17 Sept. 2017]. Sarkar, A. and Hiwase, U. (2015). Automatic Power Factor Correction by Continuous marketing. International Journal of Engineering and Innovative Technology. 4(10), pp. 170-176. Shwedhi, M.H. and Sultan, M.R. (2000). Power factor correction capacitors; essentials and cautions. In: IEEE Power Engineering Society Summer Meeting. [online]. Seattle: IEEE, pp. 1317-1322. Available at: https://ieeexplore.ieee.org/document/868713/ [Accessed 17 Sept. 2017]. Stokes, G. (2008). Handbook of Electrical Installation Practice. 4th Ed. Hoboken: Blackwell Science Ltd. Than, M.M. (2016). Implementation of Power Factor Correction Using Solid State Switched Capacitors. IOSR Journal of Electrical and Electronics Engineering. 11(4), pp. 70-79. Tiwari, A.K. and Sharma, D. (2014). Automatic Power Factor Correction Using Capacitive Bank. International Journal of Engineering Research and Applications. 4(2), pp. 393-395. Turchi, J., Dalal, D., Wang, P. and Jenck, L. (2014). Power Factor Correction (PFC) Handbook: Choosing the Right Power Factor Controller Solution. On Semiconductor, [online] Available at: https://www.onsemi.com/pub/Collateral/HBD853-D.PDF. [Accessed 16th Sept 2017]. Utpal, Rishav and Tiwari, M. (2016). Automatic Power Factor Correction Using Capacitor Banks. International Journal of Innovative Research in Electrical, Electronics, Instrumentation and Control Engineering. 4(4), pp. 9-16. Vukojevic, A., Handley, J. laval, S. and McFetridge, B. (2015). Improving power delivery through secondary voltage control. In: SoutheastCon. [online] Fort Lauderdale: IEEE, pp. 1-5. Available at: https://ieeexplore.ieee.org/document/7132938/ [Accessed 17 Sept. 2017].

The Ediacaran Fauna Essay Example For Students

The Ediacaran Fauna Essay Up until 1947, it was believed that the Cambrian Explosion marked the first true abundance of multicellular life. However, this was discovered to be untrue after Sir Douglas Mawson and R.C. Sprigg mistakenly came across numerous fossil jellyfish in the Ediacara Hills while observing what was originally believed to be sandstones belonging to the lowest strata of the Cambrian. At first, these finding were dismissed as fortuitous inorganic markings.(AAS Biographical Memoirs.) Several years later however, other discoveries of segmented worms, worm tracks, and impressions of two other assemblages that bear no resemblance to any known organism, living or extinct, prompted the South Australian Museum and the University of Adelaide to undertake a joint investigation of the region. Further studies by M. F. Glaessner, a paleontologist at Adelaide showed that the fossils were found well below the oldest Cambrian strata and that the strata actually dated from the Precambrian era. Several thousan d specimens have since been collected in the Ediacara Hills. All the fossils collected were soft-bodied animals and their tissues were strengthened by spicules-needles of calcium carbonate that functioned as their support. The Ediacaran organisms were marine animals, some crawled, some were attached to the sea floor and others would swim or just freely float. Their impressions were molded in the moving sands that washed over the mud flats and were preserved as casts in the sandstone. It is difficult to conceive how fossils of delicate soft-bodied animals could be preserved given the evidence of strong currents in the strata. However, extensive research has provided an explanation. Most of the animals settled on mud patches out of the water during calm currents. Some of these patches dried between tides and developed deep cracks. The next shifting current would then cover these cracks with a layer of sand and the lower surfaces preserved the mud in the form of perfect casts. (Glaessn er 67)The nature of these soft-bodied fossils justifies the characterization of the Precambrian as the age of the jellyfish, however the term jellyfish only refers to a number of diverse forms, which belong to the Phylum Cnideria. (Glaessner 64) Six principle forms of animals have been discovered. The first are the rounded, discoidal impressions, resembling the modern day jellyfish. The second form is the stalk-like fronds with grooved branches that also belong to the Cnideria Phylum. Next come the elongated worm-like impressions with a horseshoe shaped head followed by 40 identical segments and rounded flattened, worm-like impressions with a central groove and strong segmentation. These worm-like impressions belonged to the Annelida Phylum. The last two forms, which were oval shaped impressions with T shaped groves and circular impressions with three bent arms, resemble no known organisms and are believed to represent the Phylum Arthropoda.The most abundantly distributed fossil at the South Australian site, the Dickinsonia, was represented by over one hundred specimens. These impressions may be related to some modern day flatworms and were covered with transverse ridges. The number of ridges varies with size-while smaller forms had 20 ridges, larger ones could have as many as 550. Another notable find was the Spriggina floundersi, which was named after R.C. Sprigg and Ben Flounder; the two geologists credited to their discovery. These small annelid worms ranged between one and three inches in length and had small horseshoe shaped heads. These worms resemble the modern Tomopteridae, which have heads similar to those of the Precambrian fauna, only wider. It now appears as though these marine worms are direct descendants from the ancient forms.The Ediacaran organisms are a clear foreshadowing of one of the most dramatic events in all of lifes history-the rapid expansion of shell-bearing organisms. The earths early atmosphere was made up largely of carbon dioxide , water vapor and nitrogen. While the present atmosphere contains the preceding three elements, it also contains large quantities of oxygen. Geologists now believe that this expansion of life was a direct result of the fact that the atmosphere first accumulated abundant oxygen at this time. To contrast this, many modern descendants of the organisms present during the Precambrian such as blue-green algae do not require oxygen to survive. Oxygen is released as a waste product of photosynthesis by the blue-green algae, but would .u32f459cfb9fe38892e0f05c9d5235296 , .u32f459cfb9fe38892e0f05c9d5235296 .postImageUrl , .u32f459cfb9fe38892e0f05c9d5235296 .centered-text-area { min-height: 80px; position: relative; } .u32f459cfb9fe38892e0f05c9d5235296 , .u32f459cfb9fe38892e0f05c9d5235296:hover , .u32f459cfb9fe38892e0f05c9d5235296:visited , .u32f459cfb9fe38892e0f05c9d5235296:active { border:0!important; } .u32f459cfb9fe38892e0f05c9d5235296 .clearfix:after { content: ""; display: table; clear: both; } .u32f459cfb9fe38892e0f05c9d5235296 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u32f459cfb9fe38892e0f05c9d5235296:active , .u32f459cfb9fe38892e0f05c9d5235296:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u32f459cfb9fe38892e0f05c9d5235296 .centered-text-area { width: 100%; position: relative ; } .u32f459cfb9fe38892e0f05c9d5235296 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u32f459cfb9fe38892e0f05c9d5235296 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u32f459cfb9fe38892e0f05c9d5235296 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u32f459cfb9fe38892e0f05c9d5235296:hover .ctaButton { background-color: #34495E!important; } .u32f459cfb9fe38892e0f05c9d5235296 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u32f459cfb9fe38892e0f05c9d5235296 .u32f459cfb9fe38892e0f05c9d5235296-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u32f459cfb9fe38892e0f05c9d5235296:after { content: ""; display: block; clear: both; } READ: William Shakespeare 's Othello - Jealousy examples Essay We will write a custom essay on The Ediacaran Fauna specifically for you for only $16.38 $13.9/page Order now