The Tendency of the Firm in a Monopolistic Market Essay

The Tendency of the Firm in a Monopolistic Market - Essay Example These differences between perfect competition and monopolistic competition have social welfare implications. In perfect competition, marginal revenue is the same as price and this reflects the optimum utility of goods as the price is also equal to marginal cost. Supply also meets the demand at the most efficient level. This is illustrated in Figure 1 where supply and demand achieved equilibrium. The case is different in a monopolistic competition where there are few or no competition. The tendency of the firm in a monopolistic market is to restrict production as can be shown in Figure 1 to drive prices up as represented by P1. The market then becomes inefficient because firms are not producing at a minimum cost where price is much higher than the cost of production. This has an implication in social welfare as inefficiency would mean requiring more resources to achieve the same utility of good thereby increasing the social cost. This is not the case in a perfect competition where mar ginal revenue is the same as price. In the diagram in Figure 2, a competitive market achieves an equilibrium where demand is met with supply (MC and AR intersect). It meant that the social service can be had at its cost and is, therefore, the most optimum level where the needed service is appropriately supplied without waste. Thus comparing perfect competition with a monopolistic market, price in the monopolistic market is higher as shown in P1 compared to Price of perfect competition in P2. Production is also inefficient in the monopolistic market as shown by Q1 as it is deliberately restricted to drive the price or P1.

EPIDEMIOLOGY and BIOSTATISTICS Essay Example | Topics and Well Written Essays - 3250 words

EPIDEMIOLOGY and BIOSTATISTICS - Essay Example Specific Tests are required more when a rare disease in question. However for such a communicable disease, early detection is a must and hence the more sensitive test i.e Test B should be chosen. 2. Physicians practising in the general community often find that on the average chronic debilitating conditions such as multiple sclerosis or connective tissue diseases lead to less disability and fewer complications than they were led to expect from reading reports in medical literature on the natural history of these conditions. Why do you think this is the case? Ans 2. The chronic debilitating conditions mentioned in these diseases is a subjective and dependant variable concern. Multiple factors affect the incidence and complexity of the above mentioned diseases. Or it could be the case that, Medical awareness in the community is high so these conditions get cured before reaching an advance stage. Thus all this could contribute to the fact that these chronic conditions seem to occur with less disability and fewer complications than they were led to expect from reading reports in medical literature on the natural history of these conditions. 3. Surgeons at hospital A report that mortality rate at the end of one year follow up period after a coronary by-pass operation is 15%. At hospital B the surgeons report a 1-year mortality rate of only 8% after the same procedure. What would you find out before concluding that surgeons at hospital B perform the operation with greater skill? Referral Bias is an important factor to be considered while determining the skill in the above case. A might be getting more complicated disease cases. Even for the same disease, it might get a disease in a more advanced stage. Thus even for the same number of cases, the mortality rate of the two hospitals is not comparable. 4. The following table shows data from a

Physiological Effects of Pressure on Man and Cetaceans

Physiological Effects of Pressure on Man and Cetaceans Air and water are always exerting pressure on every object or organism on Earth. Pressure is the force or weight exerted on an object per unit area in order to move it (Anderson, 2011). It is measured in bar or atmosphere (ata as an abbreviation) and changes depending on the place on Earth affecting organisms in different ways.   Ã‚   Despite that all three groups within this study belong to the class Mammalia, they all evolved in different ways adapting them to their environment. Being cetaceans the group who is entirely aquatic including whales, dolphins and porpoises (The Editors of Encyclopà ¦dia Britannica and G. Mead, 2014). Pinnipeds are the group of fin-footed mammals who spend most of their time in the water, however, coming to shore to rest or mate and it includes seals, sea lions and walrus (NOAA, 2014). Therefore, it is aimed to analyse and compare the effects of pressure in humans, cetaceans and pinnipeds as well as comparing possible adaptions of each one. At sea level, despite being imperceptible any object or being is subject to the pressure exerted by the air defined as one bar/ata. When going underwater to the pressure exerted by the water the pressure of air at sea level has to be added. When the altitude drops every 10 meters below sea level the pressure increases by 1 bar/ata plus the one at the surface (PADI, 1996). Resulting in 2 bar/ata and so the pressure underwater can change as demonstrated in figure 1. Figure 1. The relation between Depth and Pressure. (PADI, 1996) However, if the dive is made in a submarine to a depth of 120m/396 feet the crew inside will still be subject to 1 bar of the pressure of the air and the submarine would be the one subjected to the pressure of 24bar/ata from the water and air combined (Martin, 1997). Gas Exchanges All mammals have a bidirectional respiratory system that isnt prepared for living permanently underwater like fish are. In a respiratory system like this, gas exchanges occur by using the same airways. They start to inhale oxygen (O2) at the surface before diving and at some point, all must return to release carbon dioxide (CO2) and inhale again (Martin, 1997). The exchange itself occurs in the alveoli within the lungs, being the O2 transported to different parts of the body by the circulatory system and the CO2 expelled back through the nose or mouth in humans and pinnipeds and through the blowhole in cetaceans according to WhaleFacts.org and NOAA. Cetaceans and pinnipeds being well adapted to a marine life they can hold longer underwater between dives comparing to humans who need scuba gear to dive deeper and for longer. At first, could be assumed that in the case of cetaceans the reason for longer dive time or deeper dives is lung size. However, according to Whale and Dolphin Conservation (WDC) comparing whale average body and lung size to the one of a human, a whales lungs take 4% less space in their bodies than a humans. Therefore, the key isnt in the lungs but in the blood and haemoglobin concertation which in a whales is 30% higher than in a human. This helps the whale to storage more O2 in their bloodstream and muscle tissues instead of inside their lungs and this way avoid depth related complications. And the same can be verified in some deep diver pinnipeds (Kooyman and Ponganis, 1998).   The effects of pressure on body cavities As these three groups belong the Class Mammalia they all share three main body cavities which are normally filled with air, ears, sinuses and lungs. With air being a gas it changes volume along with pressure changes, so when pressure increases air get compressed and tends to decrease in volume. On one hand in humans this results in feeling an unconformable squeeze in the ear sinus and mask when using scuba gear. If these areas arent regularly equalised by adding air to them during a dive can end up in an eardrum rupture or a large headache (PADI, 1996). On the other hand, in cetaceans, evolutionary adaptations occurred within the hearing mechanism and sinus to be suited for water-borne sounds. Adaptations such as the fusion of the middle and inner ear capsules allowed cetaceans to better interpret sounds underwater however without being able to do the same to air-borne sounds (Au, Fay, and Popper, 2000). Similarly, to humans hearing pinnipeds ears more adapted to interpret air-borne sounds as most of the communication between individuals occurs above water. Although they do hear sufficiently well underwater (Riedman, 1990). Finally, the lungs commonly to all three groups the main rule is not holding your breath completely while diving. During ascends as pressure decreases air volume increases and not realising it can cause lung rupture (PADI, 1996).   Among other major depth related consequences are barotrauma, decompression sickness or the bends and nitrogen narcosis. Decompression Sickness (DCS) While underwater the organism accumulates nitrogen and due to not being used, it must be expelled which normally happens with each exhalation. If the amount of excess nitrogen is too high when ascending the nitrogen leaving the tissue, forms large bubbles that can cause symptoms from dizziness, tingling and numbness to in severe cases unconsciousness and death. It is commonly called by divers as the bends due to the nitrogen bubbles being trapped in the joint open area and not allowing them to bend their joints without pain. With a wide range of noticeable signs and varying from mild to moderate it is difficult to diagnose DCS in humans. In the case of cetaceans despite study made by Jepson et al. showing a lot of individuals with bubble lesions, it cannot be assumed that all cetaceans mass stranding are related to severe cases of DCS when actually it was not possible to determine the origin of those bubbles. Nitrogen Narcosis This symptom is a result of a direct toxic effect of high nitrogen pressure in the body and it is similar to being under the effect of alcohol. May affect human divers at different depths but once it starts only gets worse has the depth increases and can be deadly as divers under this effect will commit dangerous actions while diving (Martin, 1997). It can also be associated with cases of DCS as it usually happens before DCS.   Regardless of being completely aquatic, semi-aquatic or terrestrial, all three groups may suffer from the effects of pressure like DCS and nitrogen narcosis. Being completely terrestrial humans are the most affected ones. Cetaceans are the most adapted group to life underwater, however, it is not safe to assume yet that this means that they are less affected or even immune to DCS nitrogen narcosis as the origin of the bubbles, that at first would be characteristic of DCS, was not determined by Jepson et al. studies. Nonetheless it is possible to say both cetaceans and pinnipeds retrieve and storage oxygen a lot more efficiently than human beings thus more efficiently avoiding DCS (Kooyman and Ponganis, 1998). Text: Anderson, M. (2011) The Physics of Scuba Diving. Available at: https://www.dawsonera.com/abstract/9781908062512 (Accessed: 19 February 2017). Au, W.W.L., Fay, R.R. and Popper, A.N. (2000) Hearing by whales and dolphins. (12 Vols). New York, NY: Springer New York. Chapter 2 Martin, L. (1997) Scuba diving explained: Questions and answers on physiology and medical aspects of scuba diving. Flagstaff, AZ: Best Publishing Company. PADI (1996) PADI open water diver manual. Santa Ana, CA: Atlantic Books. Ponganis, P.J. (2015) Diving physiology of marine mammals and Seabirds. United Kingdom: Cambridge University Press. National Oceanic Atmospheric Administration (NOAA) (2014) Whats the difference between seals and sea lions? Available at: http://oceanservice.noaa.gov/facts/seal-sealion.html (Accessed: 24 February 2017). Riedman, M. (1990) The pinnipeds: Seals, sea lions, and walruses. Berkeley: University of California Press. Whale and Dolphin Conservation (WDC) (no date) How do whales breathe? Available at: http://uk.whales.org/blog/2012/10/how-do-whales-breathe (Accessed: 24 February 2017). WhaleFacts.org (ed.) (2017) Whale Anatomy. Available at: http://www.whalefacts.org/whale-anatomy/ (Accessed: 24 February 2017). Images:   Ã‚   Figure 1: PADI (1996) PADI open water diver manual. Santa Ana, CA: Atlantic Books.

Pocahontas :: essays research papers

Who really was Pocahontas? Was she like the Indian girl in the Disney movie, who saved her reservation? Yes and no. She was an Indian of the Algonquian Indians. Her father was Powhatan, the chief. Her original name, however was in fact, Matoaka. But Pocahontas mean â€Å"playful, frolicsome little girl† and so they nicknamed her that.   Ã‚  Ã‚  Ã‚  Ã‚  The meeting and capturing of her acquaintance, and possible first love, John Smith, was in fact true. But, the saving of him may be as made up and make believe as the movie. Many people speculate the authenticity of the â€Å"execution and salvation† story, told by Smith. Supposedly, Smith’s Englishmen team landed in Jamestown, 12 miles from the Indian reservation. John Smith was captured and forced to stretch on two flat stones, then out of nowhere, and little Indian girl cam up and put herself on his body as to say, â€Å"Kill me instead†. Weather this is true or not, it doesn’t change the rest of her story. After the â€Å"saved’ him, Smith and the Indians became friendly for the following year. Smith stayed in Jamestown, and Pocahontas visited him frequently. She carried messages from her father, and other Indians carried food, fur, and then traded hatchets and trinkets. After a while, Smith’s relationship with the Powhatas worsened. Pocahontas’s visits started to lessen, and in 1806, Smith was injured, and had to go back to England. Pocahontas went on with her life though, she married an Indian â€Å"Pryvate Captyne† named Kocoum in 1610. Although in 1614, she fell in love with an Englishman, John Rolfe. They married and she got baptized. They went to London with a man named Sir Thomas Dale, and a dozen other Indians. She was presented to King James I, and all of the royal family. John Smith, the man who she had not seen in eight years, was also in London at the time. They met, and talked about the past, but at first she couldn’t speak, she was overcome with emotion. This was their last meeting.After 6 months, Ralf and his family wanted to go back to Virginia, but unfortunately, Pocahontas didn’t make it. She was ill from pneumonia. Pocahontas affected society, she was a compassionate girl, and saw to it that the colonists got food. She was also known to have saved lives of certain colonists. John Smith wrote that Pocohontas was â€Å" the instrument to pursurve this colony from death, famine and utter confusion.

Integumentary System Case Study

Suntans and Sunburns A Case Study in the Integumentary System By WH Cliff and AW Wright A Painful Winter Break On the first day after arriving in Australia for Christmas vacation, a University of Niagara student plays out in the sun for six hours. Later that night he notices that the skin on his trunk, legs and arms becomes red, swollen and extremely painful. By morning all of the afflicted areas have developed numerous blisters. These areas cover about 30% of the trunk (front and back) and 40% of the arms and legs. 1. What organ has been damaged?  ·The Integuemtary System (skin) has been damaged. 2. What general types of tissue have been afflicted?  ·Stratified squamous epithelium in the epidermis, areolar connective tissue, and some dense irregular connective tissue in the dermis have been afllicted 3. What type of burn has the student received? Explain.  ·He has received burns in the 2nd degree which are accompanied by blisters and pain. 4. What type of radiation has caused the burn?  ·Ultraviloet radition (UVA) specifically UBA and UBV. 5. List ALL the layers of the skin that have been damaged?  ·Epidermis: stratum corneum, stratum granulosum, stratum spinosum, and stratum basale.  ·Dermis (upper region): papillary layer . List ALL layers that have been killed?  ·None of the layers have been killed, just damaged in the second degree. 7. What tissue repair process causes the blistering?  ·Tissue regeneration which is the process in which liquid builds up between the epidermis and the dermis layer causing them to separate. 8. Why is this type of burn so painful?  ·Due to the damage of the epidermis many nerve endings in the dermis have been exposed which cause pain. A burn is considered critical and should receive prompt medical attention if: > 25% of the body is covered by 2nd degree burns or > 10% of the body is covered by 3rd degree burns 9. What percentage of the total body surface has been burned? Show your calculations!  ·(36% x 30%)= 11%  ·(36% x 40%)= 14%  ·(18% x 40%)= 7%  ·(11% + 14% + 7%)= 32%; #2% of the body’s surface has been burned. 10. Is the burn critical? Should the student seek medical attention?  ·Yes he should seek medical attention to avoid developing any infections in the lacerations, as well as to receive meds to assist with the pain. 11. List all of the body functions that may be disrupted by such a burn.  ·Integumentary  ·Nervous  ·Lymphatic  ·Muscular Recovery 12. After a few days the skin peels and the burned areas begin to heal. The student notices that the healing areas are more susceptible to injuries due to chafing or trauma. What has happened to the skin that would cause this increased susceptibility?  ·The barrier function has been altered so the skin is more susceptibile to trauma and damage. During the next week after the student returns to the States, his friend tells him that a sunburn prepares his skin for a deep tan. His friend encourages him to quickly begin tanning sessions at a local tanning salon before the effects of the burn wear off. 13. What would you advise him to do? Why? I would advise him not go and to avoid long periods of exposure to sun and other radiation devices. 14. Is a deep tan a sign of skin that is healthy or severely stressed? Explain your answer.  ·A deep tan is a sign of severely stressed skin. When skin is exposed to UV rays, cells called melaoncytes produce brown pigment melanin, which darkens skin the cells of the epidermis. The darkening of the skin cells is the skin natural defense mechanism against further damage for UV radiation. Unrepaired damage like so can lead to an increase risk of developing skin cancer and other skin problems like photoaging-wrinkles, sagging skin, and sun spots.

How The Internet Affects Us - 866 Words

How the Internet affect us? For decades, people have lived without a phone, a computer or a tablet in their hands. But, in these days, surviving without any kind of technology connected to the Internet is so difficult to overcome. Moreover, the youngest individuals are learning to live in a world completely dependent on the Internet. Moreover, it you want to learn about how to use computers and the Internet, go to ask your grandchildren to teach you. Anyone cannot imagine how to live without the Internet. Of course, this is categorized as the best development of the history.But, how does it affect the cizicents of the world? Some adults and teachers are worried about the loss of social skills, as the ability to communicate up close and personal with friends and family, as consequence of the Internet. The Internet is the global system of interconnected computer networks that use the Internet protocol suite to link billions of devices worldwide. It carries an expensive range of information resources and services; for example, mobile apps, the inter-linked hypertext documents, applications of the World Wide Web, etc. It is used to do homework and to search websites needed to do research. Also, it connects children after shool using social networks shuch as Facebook, WhatApp, GroupMe, etc. They communicate themselves through caht rooms and emails, but also posting comments on their friends walls. Teenegars do not know hot to hold a conversation. According to aShow MoreRelatedDoes The Internet Make You Smarter Or Dumber?952 Words   |  4 PagesThe internet is an excellent place to explore our mind and put our thoughts together; however, it also has a negative effect to our brains, and the more we use it the more it decrease our intelligence. In this essay â€Å"Does the Internet Make You Smarter or Dumber?† by Nicholas Carr, he argues about the immoral side of the internet. 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A Righteous Day by Mudrooroo Nyroongah - 1486 Words

A Righteous Day written by Mudrooroo Nyroongah on 26TH January (Australia Day), in 1988, is a poem set in the first person voice that has been composed in response to the depressing day of the Bicentenary of European Settlement. As the righteous day is reflected by the persona, this contrasts with the White Australians celebrating a successful colonisation in high-spirited ways, because to the Aborigines it is a day of mourning as they view it as Invasion day. The poem underlines the fact that despite the hardships Aborigines have experienced as a result of White Colonisation, it would be ideal if they shifted from prisoners of society to proactive citizens of Australia who will stand tall with pride and win their internal battles†¦show more content†¦The phrase emphasizes the poets view of the importance of this day in positive means, and also the negative attributes of the day. It suggests a new beginning and their possible achievements such as the possibility of uniting t he two distinct cultures together, but negatively it also seems to be a deliberate provoke, reminding the Aborigines of their defeat, and their loss of land, culture, and identity. In line 9, the poet stresses again about his peoples need to walk tall, where ideally, each Aborigine should change their mindset to become strong and proud. It displays an image of him being equal in height with the authoritative leaders, which emphasises his pride and self-respect. It also shows that the Aborigines have found new determination and hope, which is a source of their motivation to strive for justice in the face of adversity. The poet uses a comparative image of his peoples leaders performing on stilts, with the leaders who walk on stilts and stumble, suggesting that the leaders are exposed to the risks of being disempowered politically and morally. This is because the leaders are not willing to acknowledge the fact that they have caused extreme measures of destruction to the Aboriginal race. It also suggests that the leaders are weak, as they are not really tall but are on stilts, which is a deception of height, and is an illusion of their superiority over the Aborigines. The line, as they greet me with the cries