What We Know About Dinosaur Life Spans

The bleached skeleton of a hundred-million-year-old Deinonychus can tell us a lot about what this dinosaur ate, how it ran, and even how it interacted with others of its kind, but not much about how long it lived before dropping dead of old age. The fact is, estimating the lifespan of the average sauropod or tyrannosaur involves drawing upon numerous strands of evidence, including analogies with modern reptiles, birds and mammals, theories about dinosaur growth and metabolism, and (preferably) direct analysis of the pertinent fossilized dinosaur bones. Before anything else, of course, it helps to determine the cause of death of any given dinosaur. Given the locations of certain fossils, paleontologists can often figure out if the unlucky individuals were buried by avalanches, drowned in floods, or smothered by sandstorms; also, the presence of bite marks in solid bone is a good indication that the dinosaur was killed by predators (though it’s also possible that the corpse was scavenged after the dinosaur had died of natural causes, or that the dinosaur had recovered from a previously inflicted injury). If a specimen can be conclusively identified as a juvenile, then death by old age is ruled out, though not death by disease (and we still know very little about the diseases that afflicted dinosaurs). Dinosaur Life Spans: Reasoning by Analogy Part of the reason researchers are so interested in dinosaur lifespans is that modern-day reptiles are some of the longest-lived animals on the earth: giant tortoises can live for over 150 years, and even crocodiles and alligators can survive well into their sixties and seventies. Even more tantalizingly, some species of birds, which are the direct descendants of dinosaurs, also have long lifespans. Swans and turkey buzzards can live for over 100 years, and small parrots often outlive their human owners. With the exception of humans, who can live for over 100 years, mammals post relatively undistinguished numbers, about 70 years for an elephant and  40 years for a chimpanzee, and the longest-lived fish and amphibians top out at 50 or 60 years. One shouldnt rush to conclude that just because some of the relatives and descendants of dinosaurs regularly hit the century mark, dinosaurs must have had long life spans as well. Part of the reason a giant tortoise can live so long is that it has an extremely slow metabolism; its a matter of debate whether all dinosaurs were equally cold-blooded. Also, with some important exceptions (such as parrots), smaller animals tend to have shorter lifespans, so the average 25-pound Velociraptor might have been lucky to live beyond a decade or so. Conversely, larger creatures tend to have longer lifespans, but just because a Diplodocus was 10 times bigger than an elephant doesn’t necessarily mean it lived ten times (or even twice) as long. Dinosaur Life Spans: Reasoning by Metabolism The metabolism of dinosaurs is still a matter of ongoing dispute, but lately, some paleontologists have advanced a convincing argument that the largest herbivores, including sauropods, titanosaurs, and hadrosaurs, achieved homeothermy, that is, they warmed up slowly in the sun and cooled down equally slowly at night, maintaining a near-constant internal temperature. Since homeothermy is consistent with a cold-blooded metabolism, and since a fully warm-blooded (in the modern sense) Apatosaurus would have cooked itself from the inside out like a giant potato, a lifespan of 300 years seems within the realm of possibility for these dinosaurs. What about smaller dinosaurs? Here the arguments are murkier, and complicated by the fact that even small, warm-blooded animals (like parrots) can have long life spans. Most experts believe that the life spans of smaller herbivorous and carnivorous dinosaurs were directly proportional to their size, for example, the chicken-sized Compsognathus might have lived for five or 10 years, while a much bigger Allosaurus might have topped out at 50 or 60 years. However, if it can be conclusively proved that any given dinosaur was warm-blooded, cold-blooded, or something in between, these estimates would be subject to change. Dinosaur Life Spans: Reasoning by Bone Growth You might think that an analysis of actual dinosaur bones would help clear up the issue of how fast dinosaurs grew and how long they lived, but frustratingly, this isnt the case. As the biologist, R.E.H. Reid writes in The Complete Dinosaur, [bone] growth was often continuous, as in mammals and birds, but sometimes periodic, as in reptiles, with some dinosaurs following both styles in different parts of their skeletons. Also, to establish rates of bone growth, paleontologists need access to multiple specimens of the same dinosaur, at different growth stages, which is often an impossibility given the vagaries of the fossil record. What it all boils down to is this: some dinosaurs, such as the duck-billed Hypacrosaurus, grew at phenomenal rates, reaching adult sizes of a few tons in a mere dozen or so years (presumably, this accelerated rate of growth reduced the juveniles window of vulnerability to predators). The trouble is, everything we know about cold-blooded metabolism is inconsistent with this pace of growth, which may well mean that Hypacrosaurus in particular (and large, herbivorous dinosaurs in general) had a type of warm-blooded metabolism, and thus maximum life spans well below the 300 years ventured above. By the same token, other dinosaurs seem to have grown more like crocodiles and less like mammals, at a slow and steady pace, without the accelerated curve seen during infancy and adolescence. Sarcosuchus, the 15-ton crocodile better known as the SuperCroc, probably took about 35 or 40 years to reach adult size, and then continued growing slowly for as long as it lived. If sauropods followed this pattern, that would point to a cold-blooded metabolism, and their estimated life spans would once again edge up toward the multiple-century mark. So what can we conclude? Clearly, until we establish more details about the metabolism and growth rates of various species, any serious estimates of dinosaur lifespans have to be taken with a gigantic grain of prehistoric salt!

5 Written Assignment 5 Unit 5001V1 Revision 1 - 1020 Words

Chartered Management Institute Approved Centre Level 5 Extended Diploma in Management and Leadership Written Assessment – 5 Unit 5001V1 Instruction Sheet Assignment: Unit 5001V1 – Personal development as a manager and leader Level: 5 Lecturer: Ian Laing Date of Issue: 13th May 2015 Date Due In: 26th June 2015 Format: Word Document submitted to: ianlaing@ihlassociates.karoo.co.uk Assessment Outline Candidates are to write an essay of between 2500 and 3000 words excluding appendices about how to improve their own management and leadership skills and competencies to help meet your performance objectives. You should†¦show more content†¦I have completed the assignment in accordance with the Institute’s instructions and within the time limits set by my Centre. Signed†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. Date †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. Centre confirmation of authenticity: On behalf of Cofley Fabricom GDF Suez, I confirm that the above mentioned candidate: Is registered at this Centre on a programme of study leading to the Chartered Management Institute Extended Diploma in Management and Leadership (Level 5) Was given instructions to complete this assignment between the 13th May 15 and the 26th June 15, and has handed in the completed assignment within the time allowed. The candidate is, to the best of my knowledge, the sole author of the completed assignment attached. Signed†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. Date†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. Name and job title†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. CHARTERED MANAGEMENT INSTITUTE – DIPLOMA IN MANAGEMENT LEADERSHIP (LEVEL 5) LEARNING OUTCOME GRID - UNIT 5001V1 – PERSONAL DEVELOPMENT AS A MANAGER AND LEADER The right-hand column, enter the page number, section and/or paragraph where you believe you have met the Learning Outcome that is being assessed in this piece of work. Enter â€Å"Not Assessed† for Learning Outcomes that are not covered by the work you are submitting. ASSIGNMENT REQUIREMENTS/ LEARNING OUTCOMES

How Influential Is Climate Change Environmental Sciences Essay Free Essays

string(24) " on the clime of Earth\." Climate has a great influence over our lives. All our normal everyday actions are harmonizing to the clime we are populating in. However the clime has been altering from past few decennaries, which in bend is altering our life forms and therefore, has made this universe a more at a loss topographic point to populate in. We will write a custom essay sample on How Influential Is Climate Change Environmental Sciences Essay or any similar topic only for you Order Now In this essay the causes of clime alteration would be discussed, which are divided into two classs, either the clime is altering due to natural grounds or is forced to alter by the human activities. Naturally, the clime alteration is said to happen because of assorted grounds, chiefly because of volcanic eruptions, ocean current, the solar fluctuations, the Earth ‘s orbital alteration, and by many other natural grounds, which in bend produces assorted nursery gasses and in the terminal consequences into planetary heating. On the other manus, C emanation done by worlds is the greatest factor taking to planetary heating and so to climate alteration. Other activities like, chemicals used in agribusiness, deforestation and other utilizations of energy in families besides contribute in the nursery consequence. Literature Reappraisal: Definitions: Climate can be defined as the long term conditions conditions for a part, by and large determined by 30 or more old ages of records. On contrast conditions can be defined as the province of the ambiance at a peculiar topographic point and clip. Furthermore, the Green House consequence is of course in which certain atmospheric gases absorbs long wave radiation from the Earth ‘s surface which in the terminal consequences in heating the Earth ‘s surface and the ambiance. Hence planetary heating can be defined as the addition of Earth ‘s mean temperature which in so consequences into climate alteration. ( Glossary: National aeronautics and space administration ) . The Argument: There is no uncertainty about the fact that the Earth ‘s clime has become heater over the 20th century, nevertheless, there is still a difference about whether the temperature addition is due to natural grounds or because of human activities. Two groups of UK scientists have late investigated both types of consequence. Mike Lockwood and co-workers at the Rutherford Appleton Laboratory ( RAL ) argue that the Sun ‘s magnetic field has doubled over the century, and that this natural force of solar system has affected the Earth ‘s clime ( NatureA 399:437 ) . On the other manus Simon Tett and co-workers from the UK ‘s Meteorological Office in Reading and RAL argue that while solar forcing may hold added to climate alteration, nevertheless, human activities have besides been responsible for the temperature alterations from many old ages ( NatureA 399:569 ) . It has been stated that the Earth ‘s mean planetary temperature has increased by 0.6 Kelvin in the past 100 old ages. Four chief procedures that can impact the Earth ‘s clime have been evaluated. Two of these are said to be little aerosol atoms from volcanic eruptions and alterations in solar brightness. The other two, sulfate aerosols and nursery gases such as C dioxide, are due to increasing industrialisation, in peculiar the combustion of woods and fossil fuels. Lockwood and co-workers found that the entire magnetic flux go forthing the Sun has risen by a factor of 1.4 since 1964. Their consequences could supply support for the theory that changes in the solar air current could lend toA clime alteration. The solar air current and the Sun ‘s magnetic field are really good linked with each other. Harmonizing to the theory charged atoms in the solar air current would debar high-energy cosmic beams that would otherwise hold ionized the Earth ‘s lower ambiance, taking to the formation of clouds. Since cloud screen determines the sum of solar radiation reflected by the Earth back into infinite, a more powerful solar air current implies less cloud screen which, in bend, suggests that the Earth would warm up. However, the paper by Tett and co-workers suggests that natural effects entirely can non account for the form of temperature alteration observed over the past 50 old ages. They used the HadCM2 computing machine theoretical account to foretell the Earth ‘s planetary temperature during five overlapping 50-year periods ( 1906-56, 1916-1966, ) , and so compared the consequences with observations. The plan theoretical accounts both the oceans and the ambiance, and besides allows for alterations in nursery emanations, surface reflective power ( i.e. coefficient of reflection ) , volcanic aerosols and solar irradiance. They ran the coders with a figure of different solar theoretical accounts, including one that matched the effects highlighted by Lockwood. The consequences were similar for all instances: it is non possible to separate between th e parts of human activity and natural fluctuations to planetary heating in the first half of the century, but after 1946 additions in the concentration of semisynthetic nursery gases and sulfate aerosols was the dominant consequence. ( Newss: Physics World, 1999 ) Climate Change – Human Activities the Cause, Mea Culpa! But Consider 1816, the Year Without Summer! The whole universe seems to be acquiring involved with the facts of Global heating and Climate alteration. Nobel awards were awarded to the UN ‘s IPCC ( Intergovernmental Panel on Climate Change ) and Al Gore several old ages ago, followed by the Kyoto Protocol Climate Change Conference of 1997, and eventually President Obama led leaders of 192 states in understanding with its rules, assuring heavy fiscal compensations to 3rd universe states. Scientists have calculated that emanations of C dioxide by human activities sum to possibly 30 billion dozenss per twelvemonth because of assorted factors including fossil fuel combustion, cement production, gas flaring, industrial operations and take a breathing etc. They besides estimate that volcanic eruptions can on mean emit about one-forty-five to two-fifty-five million dozenss of C dioxide into the ambiance per twelvemonth. This seems to stipulate that human activities may let go of possibly 100 times the sum of C dioxide emitted by vents, therefore, this seems to be a realistic base for the cosmopolitan concern, which is that human activities have a great negative impact on the clime of Earth. You read "How Influential Is Climate Change Environmental Sciences Essay" in category "Essay examples" However, it seems like that nature itself is seeking to do things worse as foremost acknowledging fad at Copenhagen by universe leaders and President Obama in support of Global Warming so along came the coldest winter in recent decennaries. Then eventually when Obama ‘s EPA poised to impose terrible pollutant limitations and rough fiscal punishments on American industry, a volcanic eruption in Iceland devastated the air-transport industry by shuting down about all flights over Europe for a hebdomad, which led to ruining major air hoses, with absent bail-outs by authoritiess. The major natural calamities: the recent eruption of Iceland ‘s Eyjafjallajokull vent along with many other including Krakatau, temblo rs, tsunamis, hurricanes, or cyclical changing of ambiance of ocean, should be adequate to warn decision-makers about clime alteration effects. After sing the incident of the Iceland vent eruption, other than man-kind activities in the mention to planetary heating and clime alteration seems warranted. The summer of 1816 is considered to be one of the coldest on record which is studied by many conditions scientists. The twelvemonth is known as the â€Å" Year without a summer † . It is besides known as the â€Å" Poverty Year † , due to widespread devastation of harvests. Severe clime oddness during the summer destroyed harvests in Northern Europe, Northeastern United States and Eastern Canada, and mean planetary temperature lessening was sufficient plenty to do many agricultural failures around the universe. The most likely cause of the terrible clime alteration seems hence, to be the volcanic influences because greatly increased volcanic activity causes huge sums of a sh and dust to be blown and trapped high in the ambiance, which in bend cause increased contemplation of solar radiation ( alternatively of soaking up at the Earth ‘s surface ) , ensuing in globally reduced temperatures on Earth. Therefore human activities seem minor and undistinguished relation to the power of Nature. ( Kolom ) How do we cognize that atmospheric build-up of green house gases is due to human activities? Four lines of grounds prove once and for all that the recent buildup of C dioxide take topographic point mostly from human activities. The karyon of C atoms in C dioxide released by firing coal, oil, and natural gas ( fossil fuels ) vary in their features from the karyon of C atoms in C dioxide emitted under natural conditions. Tens of 1000000s of old ages ago, coal, oil, and natural gas were formed, and the part of their karyon, that was one time radioactive, has long ago changed to non- radioactive C. However the C dioxide released from natural beginnings on the Earth ‘s surface holds a mensurable radioactive part. As C dioxide has been emitted through fossil fuel burning, the radioactive fraction of C in the ambiance has decreased. Forty old ages ago scientists provided the first direct grounds that combustion of fossil fuels was doing a buildup of C dioxide and therefore cut downing radioactive C in the ambiance by mensurating the diminishing part of radioactive carbon-14 c aptured in tree rings, each twelvemonth between 1800 and 1950. Furthermore, scientists began doing accurate measurings of the entire sum of C dioxide in the ambiance in any states by late fiftiess. Their informations show convincingly that the degrees of C dioxide have increased each twelvemonth worldwide and these additions are reliable with other estimations of the rise of C dioxide emanations due to human activity over this period. In 1980, 3rd grounds was added that the ice buried below the surface of the Greenland and Antarctic ice caps contains bubbles of air trapped when the ice originally formed. These samples of fossil air have been retrieved by boring deep into the ice. Measurements from the youngest and most shallow sections of the ice nucleuss produced C dioxide consciousness to those that were measured straight in the ambiance at the clip the ice formed. But the older parts of the nucleuss show that C dioxide sums were approximately 25 % lower than today for the 10 thou sand old ages old to the oncoming of industrialisation. The concluding grounds comes from the geographic form of C dioxide measured in air. Observations show that there is somewhat more C dioxide in the Northern hemisphere than in the southern hemisphere. The difference arises because most of the human activities that produce C dioxide are in the North and it takes about a twelvemonth for northern hemispheric emanations to go around through the ambiance and make southern latitudes. ( Programme, 1997 ) Discussion: The argument on clime alteration is as what truly caused the clime to change with clip and which affected us adversely. Some say that clime is changed by natural factors like ocean currents or vents while others deny this fact and seek to turn out the point that human activities have forced the clime to alter. I support the 2nd sentiment, human activities so made the clime to alter and ensue into planetary heating. The concentration of Carbon dioxide in the ambiance has increased from 290ppm in 1880 to 352ppm in 1989 which can be concluded as the 20 % addition. This addition is about surely a consequence of human activities ( Ruddiman,2003 ) . There has been seen a sufficient addition in the emanation of Greenhouse gases due to human activities. For illustration methane has an estimated rate of emanation from human activity on the planet which is 375 million dozenss per twelvemonth. For C dioxide, there is besides an estimated rate of emanation from human activity which is 7100 million dozenss per twelvemonth. The anthropogenetic emanations of these two gases are easier to gauge, because we know about how much oil, coal, and natural gas worlds produce for ingestion around the universe each twelvemonth. We besides know about how much wood is burned and converted to agriculture each twelvemonth. Harmonizing to ‘The province of the environment ‘ published in 1991 by the Organization for Economic Co-operation and Development, human activities emit about 68 million tones of N oxides, 99 million dozenss of S oxides, 177 million dozenss of C monoxide, and 57 million tones of particulates ( dust ) . However, all these Numberss are really approximative. On the other manus, S oxides have been found to somewhat antagonize the nursery consequence caused by other gases. Still, sulfur oxides are really harmful to the environment and are best known for doing acerb rain. Carbon monoxide does n’t lend to the nursery consequence, but has important effects on atmospheric chemical science. Dust is by and large thought to chill the atmosphere close to Earth ‘s surface, but this consequence depends on assorted factors, including the size and colour of the dust atoms. ( Davis, 2004 ) The Intergovernmental Panel on Climate Change ( IPCC ) is a scientific organic structure set up by the UN to look at clime alteration. It says that human activity is the chief cause of the alterations seen in clime. Recent studies from theA IPCC have concluded that most of the ascertained addition in globally averaged temperatures since the mid-20th century isA really likelyA due to the ascertained addition inA anthropogenetic nursery gasA concentrations. â€Å" From new estimations of the combined anthropogenicA forcingA due to greenhouse gases, A aerosols, andA land surface alterations, it isA highly likelyA that human activities have exerted a significant net warming influence on clime since 1750. † ( Uk governement ‘s digital service: DirectGov ) The most of import factor for the clime alteration is the rushing up of nursery consequence by manmade activities, which is normally known as Global Warming. Basically, the Greenhouse consequence is of course caused by the emanations of gases like azotic oxide, carbon-dioxide, methane, ozone and H2O vapor.A However, anthropogenetic activities like firing the fossil fuels and deforestation makes the nursery consequence stronger. Which means more heat is trapped and the Earth ‘s clime begins to alter unnaturally. The fossil fuels ( coal, oil and natural gas ) are burned for assorted human activities chiefly used for transit, fabrication, warming, chilling, electricity coevals etc. this can be summed up after the industrial revolution, in eighteenth century, and more of the fossil fuels were being burned often. Therefore, manmade gases were being emitted into the ambiance, largely in the signifier of C dioxide emanations, from the combustion activity. These gases speed up the nursery consequence, coercing the clime to alter. Another factor forced the clime to alter and resulted into planetary heating is the act of deforestation. A Deforestation increases the sum of carbon-dioxide in the ambiance. Besides, due to the disappearing of trees, photosynthesis can non take topographic point which lowers the O degree in the ambiance. Deforestation is rampant today due to the addition in human civilisation. The degrees of deforestation have increased by approximately nine per centum in recent times. Furthermore, the combustion of wood besides causes it to disintegrate, hence let go ofing more carbon-dioxide into the ambiance, and carbon-dioxide being the chief perpetrator in planetary heating additions. Another semisynthetic cause of the addition in the Green house consequence due to the emanation of such gases is the usage of any electrical contraptions. Even the icebox in the house emits gases which contribute to the Greenhouse consequence. These gases are known as Chlorofluorocarbons ( CFCs ) and are used in iceboxs, aerosol tins, and some bubbling agents in the packaging industry, fire extinguisher chemicals and cleaners used in the electronic industry. Some procedures of the cement fabrication industries besides act as a cause towards the Greenhouse effect.A Population growing besides is an indirect subscriber and one of the causes of the Greenhouse consequence. With the addition in population, the demands and wants of the people addition. Therefore, this increases the fabrication processes every bit good as the industry processes. This consequences in the addition of the release of industrial gases which catalyze the green house consequence. The addition in population besides consequences in the addition of agricultural procedures. Most semisynthetic machines, like the car besides contribute to the green house consequence. In one of the recent articles planetary heating has been linked with the recent natural catastrophes. As about 14 million people have been affected by the torrential rains in Pakistan, A doing it a more serious human-centered catastrophe than the South Asian tsunami and recent temblors in Kashmir and Haiti combined. The catastrophe was driven by a ‘supercharged jet watercourse ‘ that has besides caused inundations in China and a drawn-out heat moving ridge in Russia. Which comes after brassy inundations in France and Eastern Europe killed more than 30 people over the summer. Jean-Pascal new wave Ypersele, vice-president of the organic structure set up by the UN to supervise planetary heating, the Intergovernmental Panel on Climate Change ( IPCC ) , said the ‘dramatic ‘ conditions forms are consistent with alterations in the clime caused by world. â€Å" These are events which reproduce and intensify in a clime disturbed by nursery gas pollution, † he sa id, â€Å" Extreme events are one of the ways in which climatic alterations become dramatically seeable. † Professor Andrew Watson, a climatologist at the University of East Anglia, which was at the Centre of last twelvemonth ‘s ‘climate gate ‘ dirt, said the utmost events are â€Å" reasonably consistent with the IPCC studies and what 99 per cent of the scientists believe to be go oning † . â€Å" I ‘m quite sure that the increased frequence of these sorts of summers over the last few decennaries is linked to climate alteration, † he said. ( Gray ) However, writers such asA Lean and Rind ( 1996 ) A believe that, although natural factors may be the ground for most temperature addition before the Industrial Revolution, ‘ the most likely cause of clime alteration since about 1850†¦ is the turning concentration of nursery gases as the net atmospheric temperature addition, or ‘forcing ‘ is mostly due to human ( anthropogenetic ) activities.Interestingly, particulate emanations from vents produce a net lessening in planetary temperatures, due to the brooding belongingss ( reflective power ) of the sulphate aerosol atoms formed in the stratosphere. ( Bianchi, 2010 ) Decision: The Earth ‘s clime is dynamic and ever altering through a natural rhythm but the anthropogenetic activities make this rhythm speed up unnaturally that create jobs in the ambiance as either the Earth gets curiously warmer or the people have to confront natural catastrophes. However if adult male has created all these jobs, he should besides seek to do things better by happening practical solutions. How to cite How Influential Is Climate Change Environmental Sciences Essay, Essay examples

Black Holes 3 Essay Research Paper Black free essay sample

Black Holes 3 Essay, Research Paper Black holes are objects so dense that non even light can get away their gravitation, and since nil can go faster than light, nil can get away from inside a black hole. Loosely talking, a black hole is a part of infinite that has so much mass concentrated in it that there is no manner for a nearby object to get away its gravitative pull. Since our best theory of gravitation at the minute is Einstein # 8217 ; s general theory of relativity, we have to dig into some consequences of this theory to understand black holes in item, by believing about gravitation under reasonably simple fortunes. Suppose that you are standing on the surface of a planet. You throw a stone straight up into the air. Assuming you don # 8217 ; t throw it excessively hard, it will lift for a piece, but finally the acceleration due to the planet # 8217 ; s gravitation will do it get down to fall down once more. If you threw the stone difficult plenty, though, you could do it get away the planet # 8217 ; s gravitation wholly. It would maintain on lifting everlastingly. The velocity with which you need to throw the stone in order that it merely hardly escapes the planet # 8217 ; s gravitation is called the # 8220 ; escape velocity. # 8221 ; As you would anticipate, the flight speed depends on the mass of the planet: if the planet is highly monolithic, so its gravitation is really strong, and the flight speed is high. A lighter planet would hold a smaller flight speed. The flight speed besides depends on how far you are from the planet # 8217 ; s centre: the closer you are, the higher the flight speed. The Earth # 8217 ; s get away speed is 11.2 kilometres per second ( about 25,000 M.P.H. ) , while the Moon # 8217 ; s is merely 2.4 kilometres per second ( about 5300 M.P.H. ) .We can non see it, but radiation is emitted by any affair that gets swallowed by black hole in the signifier of X raies. Matter normally orbits a black hole before being swallowed. The affair spins really fast and with other affair signifiers an accumulation disc of quickly whirling affair. This accumulation disc heats up through clash to such high temperatures that it emits X raies. And besides there is some X-ray beginnings which have all the belongingss described above. Unfortunately it is impossible to separate between a black hole and a neutron star unless we can turn out that the mass of the unobserved constituent is excessively great for a neutron star. Strong grounds was found by Royal Greenwich Observatory uranologists that one of these beginnings called Cyg X-1 ( which means the first X-ray beginning discovered in the configuration of Cygnus ) does so incorporate a black hole. It is possible at that place for a star to be swallowed by the black hole. The pull of gravitation on such a star will be so strong as to interrupt it up into its constituent atoms, and throw them out at high velocity in all waies. Astronomers have found a six or so binary star systems ( two stars revolving each other ) where one of the stars is unseeable, yet must be at that place since it pulls with adequate gravitative force on the other seeable star to do that star orbit around their common centre of gravitation and the mass of the unseeable star is well greater than 3 to 5 solar multitudes. Therefore these unseeable stars are thought to be good campaigner black holes. There is besides grounds that super-massive black holes ( about 1 billion solar multitudes ) exist at the centres of many galaxies and quasi-stellar radio sources. In this latter instance other accounts of the end product of energy by quasi-stellar radio sources are non every bit good as the account utilizing a super-massive black hole. A black hole is formed when a star of more than 5 solar multitudes runs out of energy fuel, and the outer beds of gas is thrown out in a supernova detonation. The nucleus of the star c ollapses to a ace dense neutron star or a Black Hole where even the atomic karyon are squeezed together. The energy denseness goes to eternity. For a Black Hole, the radius becomes smaller than the Schwarzschild radius, which defines the skyline of the Black Hole: The decease detonation of a monolithic star, ensuing in a crisp addition in brightness followed by a gradual attenuation. At peak visible radiation end product, supernova detonations can outshine a galaxy. The outer beds of the exploding star are blasted out in a radioactive cloud. This spread outing cloud, seeable long after the initial detonation slices from position, forms a supernova leftover. So, a black hole is an object, which is so compact that the flight speed from its surface is greater than the velocity of visible radiation. The following tabular array lists escape speeds and Schwarzchild radii for some objects: The black hole multitudes runing from 4 to 15 Suns ( 1 solar mass = 1 Msun = 2 ten 1033 gms. ) And ar e believed to be formed during supernova detonations. The after-effects are observed in some X-ray double stars known as black hole campaigners. The speed depends on the mass of the planet. The scientists believe if our Sun dies, the Sun may turn into a black hole. Black holes were theorized approximately every bit early as 1783, when John Michell erroneously combined Newtonian gravity with the corpuscular theory of visible radiation. The construct of an flight speed, Vesc, was good known, and even though the velocity of light wasn # 8217 ; T, Michell # 8217 ; s thought worked the same. He showed that Vesc was relative to mass/circumference and reasoned that, for a compact adequate star, Vesc might good transcend the velocity of visible radiation. His errors were double: he subscribed to the corpuscular theory of visible radiation, and he assumed that Newton # 8217 ; s jurisprudence of cosmopolitan gravity could use to such a state of affairs. These errors happened to call off ea ch other out, but when the moving ridge theory of visible radiation gained favour, the uranologists abandoned these dark stars. In the beginning of the twentieth century, Einstein proposed his theory of general relativity. The expression worked out by Michell and rederived, this clip without errors in the derivation, by Karl Schwarzschild, gives the Schwarzschild radius for any monolithic organic structure ( that is, a organic structure incorporating mass ) : RS= 2GM/c2. Vesc for any organic structure smaller than this radius would transcend that of visible radiation, and since general relativity forbids this ; any affair within RS would be crushed into the centre. Therefore RS can efficaciously be thought of as the boundary of a black hole, called an event skyline because all events within RS are causally disconnected from the remainder of the existence. There aren t many physical characteristics of a black hole. In an apothegm coined by John Wheeler, # 8220 ; black holes have no hair, # 8221 ; hair intending surface characteristics from which inside informations of it # 8217 ; s formation might be obtained. There are no disturbances in its event skyline, no magnetic Fieldss. The hole is absolutely spherical and in fact has merely three properties: it # 8217 ; s mass, it # 8217 ; s spin ( angular impulse ) , and it # 8217 ; s electric charge. Of these belongingss, it is merely the mass that concerns uranologists. As a cloud of gas contracts, the inside heats up until the nucleus is so hot and dense that atomic reactions can happen. This nucleosynthesis of H into heavier elements generates a enormous force per unit area, harmonizing to the ideal gas jurisprudence P=NkT, and this force per unit area holds the star up against farther gravitative prostration. This province of equilibrium, during which a star is said to be on the chief sequence, lasts until the H in the nucleus is used up, approximately 10 billion old ages for a star like the Sun, whereupon gravitation will restart shriveling the star. Precisely what occurs following depends on the complicated interactions between different beds of the star, but by and large, the star will detonate in a supernova. If there is any leftover of this detonation, its farther development depends about entirely on it # 8217 ; s mass. A remnant below 1.4 M ( @ ) will fall in until it can be supported by negatron degeneration force per unit area and organize a white midget. A leftover between 1.4 and 3 M ( @ ) is halted by neutron degeneration force per unit area and forms a neutron star. Degeneracy force per unit area is an consequence that consequences from quantum mechanical interactions when the denseness of subatomic atoms additions. As it depends merely on this denseness, it is non-thermal and will stay no affair how much the star cools down. Still for leftovers above 3 M ( @ ) , non even degeneracy force per unit area can counter the force of gravitation, and a black hole is born. This was the general base that general relativity gave to uranologists, but merely because something is allowed to go on doesn # 8217 ; t mean that it does. Most uranologists resisted such absurd worlds. Astronomers are really conservative by nature, and some of the most well-thought-of and influential uranologists of the twenty-four hours rejected this thought so soundly that it wasn # 8217 ; t until the 60 # 8217 ; s that any existent hunts began. At first, the lone instruments available were the old familiar optical telescopes. Optical telescopes are merely what they sound like, telescopes sensitive to the seeable part of the electromagnetic spectrum. This spectrum can uncover much information sing the beginning of the visible radiation. The colour indicates the temperature of a star. By uniting the type of star, identified by detecting tonss of other stars with similar features, and our theoretical accounts of leading procedures with a measuring of the star # 8217 ; s brightness, it is possible to cipher the distance to the star. We can even find the chemical composing of the star by detecting any emanation or soaking up lines in the spectra. Furthermore, these lines are really typical, and if they appear in the right relation to each other but have been Doppler-shifted towards the ruddy or bluish terminals of the spectrum, a measuring of the star # 8217 ; s rush comparative to the Earth can be obtained. The lone distinguishing characteristic of a black hole is its gravitation, nevertheless, and seeking for a black hole with an optical telescope is following to impossible. A black hole does non give off any visible radiation. It # 8217 ; s excessively little to detect by barricading out stars behind it. It could move as a gravitative lens, but to make so it would hold to be straight in line with the Earth and some bright object, and even so there would be no manner to separate between a black hole or a really subdued star. Still, there was on promising me thod proposed by Russian uranologists Zel # 8217 ; dovich and Guseinov in 1964. If the black hole was in a binary system with another, normal star, the light curve of the system would give it off. Binary systems comprise about half of all known stars, so it is non improbable that a black hole might be found following to a normal star. In a spectroscopic binary system, the stars rotate about their centre of mass and the visible radiation will be Doppler shifted. The light curve of a star is a graph of the strength or Doppler-shift of visible radiation from the star versus clip. Here the light curve of the seeable comrade can give much information. The period of rotary motion about the centre of mass can be determined by review of the Doppler-shifted visible radiation curve itself, and the mass of the seeable star is given by the type of star and how aglow it is. All that is so needed is a sensible estim ation of the disposition I of the system, and several of import things can be calculated. The mass map degree Fahrenheit ( M ) = M2^3 wickedness I / ( M1 +M2 ) ^2 gives a relation between the multitudes of the two organic structures, and the semi-major axis a1=AM2/ ( M1+M2 ) ^2 wickedness I ( where A is the separation of the centres of mass ) gives the size of the orbit, which can besides be related to the rotational speeds of the stars. A spectroscopic double star with no seeable comrade would be a campaigner for a black hole, and if the dim star’s mass is determined to be greater than that of the seeable star, it would be a promising campaigner. However, this method consists of many uncertainnesss. Although there were no difficult instances for black holes any scientist s hunt, there originate another manner a black hole might demo itself. If the black hole were in a gaseous nebula, the gas would fall into the black hole. The built-in magnetic Fieldss of the gas create turbu lency, bring forthing heat, which is in bend transformed into electromagnetic radiation. The brightness of the gas could hover quickly due to the turbulency, and such rapid oscillations would give the black hole off. Another Soviet scientist, Schwarzmann, developed the â€Å"Multichannel Analyzer of Nanosecond Pulses of Brightness Variation† in an attempt to observe these oscillations, but that method besides proved bootless. X-ray novas are a particular category of X-ray double stars where the system contains a late-type optical comrade ( a star near the terminal of its life ) and a compact object, which can be either a neutron star or a black hole. Normally the spectrum of the comrade in this type of system is really weak compared to that of the gas, but in X-ray novae the fraction of visible radiation from X-ray warming is negligible, and we have an first-class chance to analyze the system in item. If the accumulation disc is due to a black hole, so understanding the comra de star in item will besides let apprehension of the procedures of X-ray emanation. Several X-ray orbiters detected Muscae 1991 and computations began to nail an optical comrade. To make this, the exact place of the X-ray beginning must be known. If there is a star in the seeable scope at that same place, it is most likely related to the X-ray star, and the light curve can so be studied in item. In this instance, a comrade was found. The similarities of Muscae 1991 with one of the best black hole campaigners, V616 Mon, make it seem realistic that it might be a black hole. The development of the light curves, the decay rate in magnitude of the novae, and fluctuations in brightness on the order of a twenty-four hours are all similar in the two systems. The spectrum of the nova, its assorted emanation lines and other spectroscopic inside informations, besides does non resemble a classical nova in the same phases, but alternatively resembles that of the black hole campaigners Cen X-4 an d V616 Mon. As it is non a classical nova, the distance to Muscae 1991 must be estimated from a known additive relation of the breadth of the NaD line to distance. This gives a consequence of 1.4 kpc ( kiloparsecs ) , which returns some typical values for low mass X ray double stars and justifies assurance in its cogency. Using this distance and the spectral characteristics of the double star, the comrade star seems to be a late chief sequence star, which is in understanding with current theories of low-mass X-ray double stars. What this all boils down to is that the binary X-ray nova Muscae 1991 behaves really likewise to other black hole campaigners in the galaxy, and gives a image of the nova as a explosion of gravitative possible energy released as affair from the disc accreted onto the compact object. The big sums of energy released in the nova as X-rays indicates the comrade is at least a neutron star and perchance a black hole, but no obvious decisions can be made as to Musca e 1991’s incorporating a black hole. Cygnus X-1 is accepted as a black hole by most uranologists, there is still nil about it that demands unambiguously to be accepted as such. Cygnus X-1 is the best X-ray uranology can give us. But X raies and seeable visible radiation are non the lone ways of examining the sky. Radio uranology was besides discovered by chance. In the 1930’s, a technician seeking to unclutter up intercontinental phone calls discovered wireless moving ridges coming from the Milky Way. Curiously plenty, cipher truly seemed to care really much ; an amateur built the world’s foremost radio telescope. A modest 9 metres in size, it had highly hapless declaration, and the larger dishes that were to easy follow did non do much better. As in X-ray uranology, the uranologists couldn’t do anything truly utile with cosmic wireless moving ridges until they could place an optical opposite number. Since wireless moving ridges are on the order of metres long, diffraction effects would necessitate unreasonably big dishes to get any nice declaration. To counter this, uranologists came up with wireless interferometry. At first the organic structures that shone most brilliantly in the sky could non be associated with an optical opposite number. As wireless telescopes improved, the mistake boxes for these beginnings shrank until, in 1953, a squad at Cambridge had a sufficiently accurate estimation that other uranologists at the Palomar 5-meter optical telescope could place the wireless beginning Cyngus A with an optical beginning. This beginning turned out to be a galaxy, and one time it’s red shift, and therefore distance, were measured, it was found that this galaxy’s wireless brightness was 1000000s of times brighter than that of an ordinary galaxy. The first wireless galaxy had been found. Now that the engineering was in topographic point, more and more of these galaxies were discovered and they began to be studied in great item. The consequences troubled uranologists ; wireless galaxies had two lobes of wireless emanations with the subdued optical galaxy in the centre. These lobes stretched out 1000000s of light years, bespeaking a stable beginning of emanation, and conservative estimations of the energy involved in their production was on the order of 10^61 ergs, as much energy as would be released in 10 billion supernovas. Radio galaxies were among the first in what are today classified as AGN – active galactic karyon. Other types of AGN include Seyfert galaxies, N galaxies, BL Lacertae objects, and quasi-stellar radio sources. They all demonstrate violent behaviour that can’t be associated with the ordinary behaviour of stars and interstellar dust, whether it be matter and energy ejected from the karyon to brightnesss of genuinely astronomical proportions. While all these objects were regarded as mystifiers, it was truly the quasi-stellar radio sources that could non be explain ed by any astronomical procedures at all. Of class they do be, and uranologists rushed to happen accounts for them. It was in this storm of hypotheses that the thought of a super-massive black hole lost it’s alien nature and became the most sensible account. In fact, many of the other realistic accounts besides support this thought, for they could germinate into a super-massive black hole. If there are a batch of star-star hits happening, the stars will lose adequate energy such that they become bound in a binary which reasonably quickly decays, if they do non blend straight with each other. Such theoretical accounts of AGN could hold two natural consequences without raising black holes: supernova detonations, or bunchs of pulsars. The supernova detonations are merely every bit efficient as regular atomic combustion in stars, and must happen at a rate of about 5 to 10 a twelvemonth. Furthermore, these supernovas can non be ordinary leading supernovas but instead a kind of â⠂¬Ëœhypernova’ , wherein neutron stars must go through through the nucleuss of super-massive stars, due to computations of the energies released. If the bunch evolves into a bunch of pulsars, it is the rotational energy of the pulsars that powers the quasi-stellar radio sources. Through horrendously complicated interactions of atoms and strong electromagnetic Fieldss, this energy could be released into the existence, but both this and the supernova theoretical account have another serious defect ; there is no directivity of the radiation that could ensue in the ascertained jets of quasi-stellar radio sources and other AGN. To rectify this would necessitate a planate cloud of gas that would either rush the decease of the bunch and it would fall in into a black hole, or the brightness would be so great that the ensuing air current of radiation would drive the gas into infinite, thereby destructing the theoretical account wholly. Other theoretical accounts involve the rotational energies of monolithic uncollapsed organic structures. Known as super-massive stars, magnetoids, or spinars, they are all fundamentally the same ; a monolithic, whirling flattened disc ( a super-massive rotating star will germinate into a disc ) . One manner these spinars could emancipate energy is by gravitative contraction, let go ofing up to a few per centum of their remainder mass as energy. However, to stay stable against prostration, a really big UV radiation force per unit area must be present, and such radiation is non found in wireless galaxies, though they might be in high-redshift quasi-stellar radio sources. A pulsar is a revolving neutron star with skewed magnetic poles. Radiation is emitted in the way of the magnetic poles, and if this beam passes Earth, it has the same consequence as a beacon. The unbelievable angular impulse of a pulsar makes its pulsations highly regular, to a grade of truth elsewhere found merely in atomic redstem storksbills. As such, the orbit o f a binary pulsar can be scrutinized in utmost item, and has been. The consequences are astonishing ; the period of the stars is worsening and their orbit is easy disintegrating to precisely the grade predicted by general relativity. A better cogent evidence of gravitative radiation could barely be imagined. The first individual to try to observe this radiation was Joseph Weber. He finally came up with the first saloon gravity-wave sensor. This was a long aluminium cylinder, 2 m by 1/2 m, that should be compressed with an incoming gravitation moving ridge. To observe this compaction he wired piezoelectric crystals, which respond to coerce by bring forthing an electric current, to the outside surface of the saloon. Although it didn’t work, other saloon sensors were built that used a device called a stroboscopic detector to filtrate out random quivers. This was an clever device, but it excessively proved to be a non-contributor in the promotion of larning more of the galaxy. Me rely as X-ray astronomy went from simple sensors in the olfactory organs of projectiles to full fledged X-ray telescopes housed in revolving orbiters, and wireless uranology went from petroleum dishes to continent crossing arrays, gravitation wave sensors may demo a wholly new spectrum. And, merely as X-rays brought a wholly new universe into focal point, one can barely conceive of what a gravitative position of the existence will uncover. At the really least, we will hold unequivocal cogent evidence or denial of black holes, but we may happen that black holes are some of the more elusive characteristics of the existence. 322

Why Do Prices Of Some Goods Fluctuate More Than Others Essays

Why do prices of some goods fluctuate more than others Q. Why do prices of some goods fluctuate more than others? A. It is a well known fact, that various prices of goods fluctuate at various levels. The products which fluctuate most in price are often held to be necessities, but what is that makes these changes, and which factors influence them. Before trying to conclude which goods fluctuate most price- wise and why, it seems sensible to ask which group these products belong. As mentioned necessities are known to be inelastic, but so are a lot of products with no close substitutes like for example motor cars, petrol, tobacco and alcoholic drinks. Now what do these goods have in common, one might ask. Well, for starters they all have a very inelastic demand. In these situations we get the graph as the one below (1.A). From 1.A it is obvious that if quantity by some reason decreases from Q1 to Q2 this gives a quite high increase in price from P1 to P2. From this it can be concluded that a small change in quantity of a product which has low elasticity, results in high changes in price, i.e. a lot of price fluctuations. On the other hand we have products who's prices rarely fluctuate as for example luxuries. Here again it is obvious that a change in quantity demanded will result in only a little change in price. This is displayed in the graph 1.B below. Here we can see that quantity changes from Q1 to Q2 resulting on the change P1 to P2, which here concludes that the products like luxuries have highly elastic demand, resulting in only small price fluctuations. From the above I can conclude that the reason why some goods fluctuate more price wise than others is due to the elasticity of the examined good.

The Efficiency-Wage Theory in Economics

The Efficiency-Wage Theory in Economics One of the explanations for structural unemployment is that, in some markets, wages are set above the equilibrium wage that would bring the supply of and demand for labor into balance. While it is true that labor unions, as well as minimum-wage laws and other regulations, contribute to this phenomenon, it is also the case that wages may be set above their equilibrium level on purpose in order to increase worker productivity. This theory is referred to as the efficiency-wage theory, and there are a number of reasons that firms might find it profitable to behave in this way. Reduced Worker Turnover In most cases, workers dont arrive at a new job knowing everything that they need to know about the specific work involved, how to work effectively within the organization, and so on. Therefore, firms spend quite a bit of time and money getting new employees up to speed so that they can be fully productive at their jobs. In addition, firms spend a lot of money on recruiting and hiring new workers. Lower worker turnover leads to a reduction in the costs associated with recruiting, hiring, and training, so it can be worth it for firms to offer incentives that reduce turnover. Paying workers more than the equilibrium wage for their labor market means that it is more difficult for workers to find equivalent pay if they choose to leave their current jobs. This, coupled with the fact that its also less attractive to leave the labor force or switch industries when wages are higher, implies that higher than equilibrium (or alternative) wages give employees an incentive to stay with the company that is treating them well financially. Increased Worker Quality Higher than equilibrium wages can also result in increased quality of the workers that a company chooses to hire. Increased worker quality comes via two pathways: first, higher wages increase the overall quality and ability level of the pool of applicants for the job and help to win the most talented workers away from competitors. (Higher wages increase quality under the assumption that better quality workers have better outside opportunities that they choose instead.) ​ Second, better paid workers are able to take care of themselves better in terms of nutrition, sleep, stress, and so on. The benefits of better quality of life are often shared with employers since healthier employees are usually more productive than unhealthy employees. (Luckily, worker health is becoming less of a relevant issue for firms in developed countries.) Worker Effort The last piece of the efficiency-wage theory is that workers exert more effort (and are hence more productive) when they are paid a higher wage. Again, this effect is realized in two different ways: first, if a worker has an unusually good deal with her current employer, then the downside of getting fired is larger than it would be if the worker could just pack up and get a roughly equivalent job somewhere else. If the downside of getting fired if more severe, a rational worker will work harder to ensure that she doesnt get fired. Second, there are psychological reasons why a higher wage might induce effort  since people tend to prefer working hard for people and organizations that acknowledge their worth and respond in kind.

Negligence in medical malpractice based in medical law Research Paper

Negligence in medical malpractice based in medical law - Research Paper Example In the worst instance, a hospital error causes death of a patient, bringing about grief and financial strain on the deceased’s relatives (Andrew Grubb 445). A wrongful-death lawsuit can be filed to demand damages for lost wages and suffering or pain. Examples of hospital errors that could result in medical malpractice include: - Birth injuries: Improper labor services resulting injury to a baby, at times leading to complications such as Erb’s palsy or cerebral palsy. - Prescription errors: This may be over or under medication, or administration of the wrong drug. - Improper diagnoses: A patient may be treated for an illness he or she is not suffering from or a disease remains untreated because of the doctor’s failure to recognize a intimidating condition. - Surgical errors: Negligence may lead to infections or surgery on the incorrect body part or even the wrong patient. Medical malpractice law lies under personal injury law subset and its practice frequently overlaps with litigation law. This area of practice deals with legal claims on medical care specialists when the care they offer or the lack thereof, cause injury, damage, harm and/or death of the patient. The laws guiding medical malpractice varies from one state to another. These highly regulated procedures explain many aspects of the practice process, including the following: - If notice of the malpractice assertion have to be given to the medical professional before filing; - If the claim must be handed to a malpractice review board before being filed in court; How speedily a medical malpractice claim should be filed; Determining the essential qualifications for a professional medical witness, for the reasons of testifying; and Establishing statutory caps on compensations that may be awarded to the plaintiff. Although medical negligence is normally attributed to the medical professionals responsible for patients’ diagnosis, medical care / medical treatment, medical corporations, managed care organizations, clinics and hospitals may as well be sued for their employees’ actions (Stauch 66). As with every personal injury claim, proof of negligence is vital. The tort of negligence comprises of 4 elements which must be all proven to attain this verdict. The 4 elements include: (i) There was a duty of medical care owed; (ii) The medical care professional desecrated the standard of care obliged, which demonstrated negligence; (iii) This negligenc e by the medical professional caused the injury /harm; and (iv) There were compensable damages directly resulted from the injury/harm suffered . Since there is a patient - doctor relationship, the first element is usually already established in these kinds of claims. For the 2nd element, if there is no an obvious and glaring blunder, expert witness testimony is commonly implemented to prove the negligent behavior or actions. The complainants are the party passing the action and they bear the burden of attesting these elements in their claims against the medical care giver, the defendant (Smith). Medical malpractice claims are the subject of extreme controversy. Healthcare professionals and medical care businesses have encouraged legal reforms meant to eradicate big money awards for health damages, claiming that defending a case against the various lawsuits and the exorbitant compensations have resulted in a costly healthcare costs. In some states, this aggressive advocacy for these measures has resulted to

A picture of reading Essay Example | Topics and Well Written Essays - 250 words

A picture of reading - Essay Example They turned their flashlights on. They each went separate ways, imagining different lands and living in different societies. Luke went to a faraway island because of a sunken ship, while Jenna went to Mars as the first girl astronaut. The photo shows the prestige of reading to children who grow in an environment where they have access to books. The reading is happening inside their home, which suggests, that their parents or someone in the family values reading enough to provide them books. The setting is important in showing that parents have a large role in encouraging their children to love reading. Also, in this photo, reading has become an act of bonding and going to different adventures. It shows that girls and boys alike can enjoy reading because they can read the books they like. Brothers and sisters can enjoy reading together. They may not be directly playing with one another, but they can talk about the stories later. The photo shows that reading is good for creativity and

Finance International Expansion Essay Example | Topics and Well Written Essays - 1000 words

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Intravenous Medications in the Nursing Environment

Intravenous Medications in the Nursing Environment Phoebe Roberts Administer and Monitor Intravenous Medications in the Nursing Environment Question 1 a. Signs and symptoms of iron deficiency anaemia include fatigue, irritability, tachycardia, pale skin,  difficulty concentrating, brittle nails and shortness of breath. (Williams Hopper 2011 p. 562). b. As the patient has iron deficiency anaemia a blood transfusion is necessary to increase  haemoglobin levels within the blood as this helps to transport oxygen to cells and tissues. She also  has a history of PR bleeding. Therefore this blood transfusion is helping to replace volume lost, to  increase circulating blood volume and to improve the oxygen carrying capacity (Hamlin, Richardson-Tench, Davies 2009 pp 155,156) c. It is important to follow the Pico prep instructions as faecal matter can obscure the viewing of the  the colon. Pico prep aims to thoroughly cleanse the colon of any matter or gas to ensure that the  visual field is clear ( Corbett Banks 2011 pp. 675,676). d. Pico prep is an osmotic laxative, its action decreases the fluid absorption within the bowel which  then results in the onset of diarrhoea within 1-4 hours. Side effects can include abdominal bloating,  abdominal pain, nausea, vomiting and flatulence. ( Tiziani 2013 pp. 876,879). e. The action of this medication would have quite an impact on this elderly patient. Although she  mobilises with a four wheel walker it would become increasingly difficult to mobilise to the toilet so  frequently to empty her bowels in time. This may increase the chances of her having a fall ( Williams   Hoper 2011 p. 747). Lowering the bed, having her four wheel walker in reach and the application of  hip protectors may aid in reducing the risk of her having a fall and in the chances of her having a fall  the hip protectors may aid in protecting that area.( Crisp, Taylor, Douglas, Rebeiro 2013. p. 454). Providing a bedside commode may also reduce the chances of falls as it is located closer to her than  the toilet may be. As she is an older patient the skin around the area may become excoriated and skin  breakdown may occur due to the acidity of the diarrhoea and the area frequently being wet. Barrier  creams should be applied to at risk areas for protection. Diarrhoea can also quickly cause dehydration  and electrolyte imbalances in the elderly, this may also have an impact on this patients fluid and  electrolyte levels (Williams Hopper 2011. pp. 275, 747). Question 2. a) This patient is displaying possible signs and symptoms of a suspected urinary tract infection such  as incontinence, a burning sensation when she voids, fever, confusion and blood stains on her pad. A urinalysis should be performed to support a diagnosis of a urinary tract infection ( Williams   Hopper 2011 p. 838). As she is incontinent of both urine and faeces a thorough skin assessment  should be performed to identify the areas at risk and to identify any change in skin integrity. Skin  turgor should also be assessed as this can indicate a sign of dehydration (Crisp et. al. 2013 p. 592). A  fluid balance chart should be maintained to assess if the patient is in a positive or negative fluid  balance and the weight of the patient should also be assessed as noticeable weight changes can  indicate hypovolaemia (Crisp et.al 2013 p.1214, Scott 2010 p. 62). Auscultation of the chest could  prove useful in determining the reason of the increased respiratory rate and low oxygen saturation  levels ( Lewis Foley 2011 p. 356). A falls risk assessment should also be performed as the elderly  patient has a few risk factors for falls such as confusion, reduced mobility an d is incontinent of urine  and faeces. This can help to implement interventions to reduce the risk of a fall ( Crisp et.al p. 454). As this patient is at risk of both hypovolaemia and hypokalaemia the doctor should be notified to  thoroughly assess the patient and implement therapy for a suspected urinary tract infection. b) Cranberry juice can be effective in helping to reduce pain when urinating and also prevents the  bacteria adhering to the wall of the bladder, this method can be helpful in reducing the pain of a  urinary tract infection however the patient is undergoing a procedure the next day, therefore this  intervention should be implemented with the approval of a medical officer. A heat pack could be  placed on her abdomen to relive any pain and discomfort along with the administration of an  antipyretic to reduce her fever and pain (Williams Hopper 2011 p. 840). As the patient is having  difficulty breathing she should be placed in a suitable position to help with proper lung expansion such  as the high fowlers position along with the administration of oxygen to increase oxygen levels within  the blood. (Williams Hopper 2011 p. 604). The patient’s vital signs should be continuously  assessed to monitor any improvements or deterioration especially her blood pressur e and heart rate  as any further abnormalities such as arrhythmias and a further decline in blood pressure could  indicate hypovolaemia and hypokalaemia. Continuous assessment of her neurological state should  also be implemented to monitor any changes (Scott 2010 p. 64). c. Hypokalaemia occurs due to an excessive loss of potassium from the body or from an inadequate  intake of potassium. The body is unable to conserve potassium and relies on an adequate intake of  potassium to maintain a balance within the body. An excessive loss of potassium can be due to  diuretic therapy – especially potassium wasting diuretics, corticosteroids, vomiting and diarrhoea. Signs and symptoms include an irregular weak pulse, hypotension, muscle cramps, muscle weakness  and shallow respirations. (Williams Hopper 2011 p. 79, Scott 2010 p. 98). Medical management is aimed at restoring potassium levels either by increasing the intake of  potassium in the diet or oral potassium supplements. Intravenous replacement therapy is also  implemented in those with severe hypokalaemia to rapidly increase potassium levels. Diuretics may  be changed to a potassium sparing diuretic to prevent the loss of potassium from the body. (Scott  2010 pp. 100,101). Nursing management includes monitoring fluid input and output, monitoring the heart rate and rhythm  of those receiving IV replacement therapy, maintaining and ensuring the correct administration of the  therapy and continuous monitoring of the patient’s condition throughout. ( Scott 2010 p.102). Hypovolaemia occurs due to the loss of fluid from the body and extracellular spaces; this can be due  to excessive bleeding, excessive sweating, burns, diuretic therapy, diarrhoea, renal impairment and  vomiting. The loss of fluid then results in a decreased blood volume. (Williams Hopper 2011 p.71,  Scott 2010 pp. 60, 61). Signs and symptoms include thirst, nausea, hypotension, restlessness,  confusion, dizziness, cool pale skin, tachycardia, increased body temperature, weight loss and a  decline in cognitive status. (Williams Hopper 2011 p 72, Scott 2010 p. 62). Medical management includes finding and stopping the source of the fluid loss, the replacement of  lost fluid with an intravenous infusion with the same osmolality of blood to increase the body’s blood  volume. ( Scott 2010 p.63). Nursing management includes the administration and maintenance of intravenous fluid replacement,  monitoring the daily weight of the patient, monitoring fluid input and fluid output, encouraging the  intake of fluids to aid in restoring fluid balance and providing mouth care to maintain the integrity of  the oral mucous membranes. (Crisp et.al. p. 73). Question 3 a) Midazolam is used in this procedure as it is a sedative, hypnotic agent and muscle relaxant. This  aims to reduce the amount of movement throughout the procedure and assists in keeping the patient  in a sedative state and impairs memory function ( Tiziani 2013 p. 967). Fentanyl would be used to  reduce pain during the procedure and also aids in the maintenance of the anaesthesia ( Tiziani 2013  p 928) Diprivan is used to induce sedation and also increases the effects of the hypnotic agent and  analgesia ( Tiziani 2013 p 793.) b) Midazolam acts by binding with a benzodiazepine receptor in the central nervous system which  inhibits neurotransmitters in the brain resulting in a calming sedative affect ( DrugBank, Midazolam  DB00683 2013). Midazolam given intravenously takes affect within 1.5 2.5 minutes. Adverse effects  include respiratory depression, memory impairment, anxiety, muscle weakness, drowsiness,  hypotension, dizziness, fatigue and decreased alertness. (Tiziani 2013 pp 964, 967) Fentanyl acts on receptors within the brain, spinal cord and muscles and bind with opioid receptors  producing an analgesic affect. Administered intravenously fentanyl takes affect almost immediately.   Side effects include respiratory depression, apnoea, dyspnoea, vomiting, nausea, increased intra  cranial pressure, bradycardia, sedation, confusion, constipation, hypotension and muscle rigidity.  (Tiziani 2013 p. 923) Diprivan suppresses the central nervous system and produces a loss of consciousness. Adminstered  intravenously diprivan takes affect within 30 seconds of administration. Side effects include  respiratory depression, tachycardia, hypotension, shivering and involuntary muscle movements (Tiziani 2013 p 793) Nursing care includes continuous monitoring of respiratory rate, heart rate and vital signs during  administration of these agents and throughout the procedure, ensuring that the dose is titrated to  produce the right affect, a sedation scale should be performed when the patient is conscious,  ensuring that the patient is aware that midazolam can cause muscle weakness so care should be  taken when mobilising. Central Nervous System toxicity may occur when all three medications are  given together therefore continuous monitoring is extremely important as the effects on the central  nervous system are increased ( Tiziani 2013 p 964,968). c) As this patient has renal failure the kidneys ability to filter and excrete waste is decreased, this may result in an accumulation of the medications and could possibly result in drug toxicity – especially  opiate medications (Tiziani 2013 p.925). This patient is elderly and may have increased sedation and  confusion after the procedure due to her age and renal function and is at a high risk of falls especially  as midazolam causes muscle weakness. Midazolam administered to an elderly patient can cause  delirium, therefore this patient is at an increased risk of being affected by this ( Tiziani 2013 p.964). Constipation is also going to affect this patient as this is one of the major side effects of opiate  medications. Reference List Corbett, J., Banks, A., (2013). Laboratory Tests and Procedures with Nursing Diagnoses ( 8th Edition) New Jersey: USA. Pearson Education Crisp, J., Taylor, C., Douglas, C., Rebeiro, G., (2013). Potter Perry’s Fundamentals of Nursing (4th Edition). Chatswood: NSW. Elsevier Australia. DrugBank (September 2013) Midazolam (DB00683) Retrieved March 10, 2015, from http://www.drugbank.ca/drugs/DB00683 Hamlin, L., Richardson-Tench, M., Davies, M., (2009) Perioperative Nursing (1st Edition). Chatswood: NSW. Elsevier Health. Lewis, P., Foley, D., (2011) Health Assessment in Nursing (1st Edition). Broadway: NSW. Lippincott Wilkins Scott, W., (2010) Fluid Electrolytes Made Incredibly Easy (1st Edition) London: England. Lippincott Williams Wilkins Tiziani, A., (2013). Harvard’s Nursing Guide to Drugs (9th Edition). Chatswood: NSW. Elsevier Australia. Williams, L.S., Hopper, P.D., (2011). Understanding Medical Surgical Nursing (4th Edition). Philadelphia: USA. F.A Davis Company.

Corruption and Failure in F. Scott Fitzgerald’s The Great Gatsby :: Great Gatsby Essays

Corruption in The Great Gatsby      Ã‚   The theme of human corruption, its sources and consequences, is a common concern among writers from Shakespeare through J.D Salinger. Some suggest that it attacks from outside, while others depict corruption occurring from within the individual. In the case if The Great Gatsby and it's protagonist's fate, Fitzgerald shows both factors at work. The moral climate of the Roaring Twenties, Daisy Fay Buchanan's pernicious hold on him, and Jay Gatsby's own nature all contribute to his tragic demise.      Ã‚  Ã‚   First, the loose morality of Dan Cody, Gatsby's unfortunate role model, and superficial people who flock to Gatsby's parties contribute to Gatsby's downfall. Their examples encourages Gatsby's interpretation of The American Dream- his naive belief is that money and social standing are all that matter in his quest for Daisy. The self-absorbed debetants and their drunken escorts are among those who "crash" his extravagant soirees. As Nick Carroway tells us, "People were not invited- they went there." (pg.40) Shallow, corrupt people like Jordan Baker gossip with reckless abandon about their mysterious host. Their careless, superficial attitudes and wanton behavior represent Fitzgerald's depiction of the corrupt American Dream.      Ã‚   Another force of corruption responsible for Gatsby's fate is his obsession with a woman of Daisy's nature. Determined to marry her after returning from the war, he is blind to her shallow, cowardly nature. He is unable to see the corruption which lies beyond her physical beauty, charming manner and playful banter. That she is incapable of leaving her brutal husband, Tom, of committing herself to Gatsby despite his sacrifices escapes him. As Nick observes, Gatsby's expectation is absurdly simple:"He only wanted her to tell him [Tom] that she never loved him." (pg.91) Daisy is not worthy of the pedestal on which she is placed. Since she is hallow at the core, so is his dream which is based on a brief flirtation, nothing more.      Ã‚   Finally, Gatsby's own character-especially his willful obsession-contributes to his fate. Despite his naivetà © about Daisy and her friends who "are rich and play polo together," he, too, has been seduced by the lure of money and fame. Unable to control his obsessive desire to have Daisy, he cares little about the

English Consonants

RESEARCH PAPERS | 23 How Many Consonant Sounds Are There in English? How Many Consonant Sounds Are There in English? by David Deterding, National Institute of Education, Singapore †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. Most analyses agree that there are 24 consonant sounds in English. However, it is valuable to consider in some detail a few issues that affect the status of these consonants. First, we can think about why the affricates /t? / and /d / are treated as single consonants rather than sequences of two consonants. Second, one might discuss why it is that /w/ and /j/ are classified as consonants rather than vowels. Third, there is the possibility of a voiceless counterpart of /w/ that, for some speakers, differentiates which from witch. And finally, there is the question of whether the velar nasal /? / is actually an allophone of /n/. After considering these issues, most people will still conclude that there are 24 consonants in English. However, the discussion can help us gain a deeper understanding of English phonology. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. s Introduction How many consonant sounds do you think there are in English? Of course, most of us know that there are 20 consonant letters in our alphabet (or 21 if you include ‘y’), but here we are talking about sounds, not letters. And there is a mismatch between sounds and letters: sometimes two letters combine to represent one sound, so that ‘s’ + ‘h’ combine to represent the sound /? / and ‘t’ + ‘h’ combine for /? /, and sometimes one letter is pronounced as a sequence of two sounds, as ‘x’ is usually /ks/. So the number of consonant letters in our alphabet is irrelevant when considering the number of consonant sounds (phonemes) in English. The basic answer to the original question is that there are 24 consonant sounds in English: q 6 plosives : /p b t d k / q 9 fricatives : /f v ? ? s z ? / q 2 affricates : /t? d / q 3 nasals : /m n ? / q 1 lateral-approximant : /l/ q 3 approximants : /w j r/ However, things are never quite as simple as that in the study of languages, and there are a number of issues that we might consider in more depth: q Why are /t? / and /d / regarded as single phonemes and not as sequences of two phonemes? q Why are /w/ an d /j/ regarded as consonants and not vowels? q Do those people who distinguish which from witch have one extra phoneme, / /, a voiceless equivalent of /w/? q Should /? / really be regarded as a separate phoneme? Or can it be analysed as an allophone of /n/? s The status of /t? / and /d / The two affricates are each written as a sequence of two symbols, so why do we regard them as single consonants? Why do we not, for example, analyse cheese /t? i z/ as having two consonants at the start, /t/ followed by /? /? The answer is that /t? / behaves phonologically as a single sound, even if phonetically it is rather similar to a plosive followed by a fricative. In analysing its behaviour, we need to think about the patterns of distribution of /t/ and /? (Laver, 1994:365), so we should consider what sequences of sounds can occur together, particularly at the start of a syllable. English allows quite complex syllable onsets, such as /str/ in string and /spl/ in splash, but it does not generally permit a plosive followed by a fricative, so */pf k/, */ts? / and */k p/ are not possible words of English. (In the few cases where the spelling does suggest a plosive followed by a fricative at the start of th e word, such as psychology, the plosive is actually silent. ) But note that chip /t / and check /t? ek/ are perfectly good words of English. So if we treated /t? / as a sequence of two phonemes, we would have to make a special exception to the rule that an English word cannot begin with a plosive followed by a fricative. Note that /t? / can also occur at the end of a word, as with catch /k t? / and rich /r? t? /, and there are no other instances where /? / can occur after a plosive at the end of a word, as */k k? / and */r? p? / are not possible words in English. The situation with /d / provides even stronger evidence. The consonant / / is rather rare in English, and apart from in some recent loan words such as genre / ? nr? /, beige /be? /, and rouge /ru / (all of which still sound rather foreign), / / can only occur in the middle of a word, mostly between two vowels, as in pleasure Copyright  © 2005 Singapore Tertiary English Teachers Society1, 2005 STETS Language & Communication Review, Vol. 4, No. (STETS) w 24 | David Deterding s The status of /w/ and /j/ If you say /w/ and drag it out, it sounds rather like /u /, and similarly /j/ sounds rather like /i / (Roach, 2000:64). If they sound like vowels, why do we classify /w/ and /j/ as consonants? Sometimes it is valuable to make a distinction between a contoid and a consonant: contoids are articulated with an obstruction in the vocal tract, but consonants are sounds which can occur at the edge of a syllable (Laver, 1994:147-8). In other words, contoid is a phonetic term which describes the articulation of a sound, while consonant is a phonological term which describes its behaviour within a syllable. From the phonetic perspective of articulation, we find that plosives, fricatives, nasals, and the lateral approximant /l/ are all contoids, because they all involve a constriction in the vocal tract, but /j/ and /w/ (and maybe /r/ as well) are not contoids. But now we should consider phonological behaviour and thereby determine which sounds should be classified as consonants. Let us think about what can occur before /et/ to create a monosyllabic English word. We have words such as bet /bet/, pet /pet/, set /set/, net /net/, and debt /det/, but not */? t/ or */ et/, so we regard /b p s n d/ as consonants because they occur at the edge of a syllable, but /? / are vowels. However, note that we can also have wet /wet/ and yet /jet/. This confirms that /w/ and /j/ are consonants. In one other aspect of behaviour, we can consider the distribution of the indefinite articles a and an: a occurs before consonants, while an occurs before vowels, and this depends on the pronunciation and not the spelling, so it is an hour not *a hour because /a / begins with a vowel (the ‘h’ is silent). But note that we have a waste and a year, not *an waste and *an year, and notice that once more this is based on pronunciation and not on spelling, as it is a university (which begins with /j/) and not *an university. So again we see that /w/ and /j/ behave as consonants, not as vowels (Roach, 2000:64). s The status of /? / In standard phonemic analysis, we assume that if the occurrence of a sound can be predicted from the surrounding sounds, it is regarded as an allophone and not as a phoneme. So, for example, we treat [ ], the dark /l/ sound that occurs at the end of a word such as fill, as an allophone of /l/ because we can specify that it only occurs in the coda of a syllable (or as a syllabic consonant in words such as bottle), unlike its clear counterpart which occurs before a vowel. So what about /? /? Note that /? / can also only appear in the coda of a syllable, and furthermore we can predict that /? / rather than /n/ will always occur before another velar sound, such as in bank /b ? k/ and anger / ? ?/. So should /? / be regarded as an allophone of /n/ (and then be written as [? rather than /? /)? The crucial test for a phoneme is the existence of a minimal pair: if there are two words which only differ with respect to one sound distinction, then we know that we have two separate phonemes. For example, we know that /f/ and /v/ are different phonemes of English because of the existence of the minimal pair fan /f n/ and van /v n/ where the only difference is in the initial consonant, and similarly the difference in the final sound of back /b k/ and bag /b / establishes /k/ and / / as separate phonemes of English. On this basis, we can be confident that /n/ and /? / are different phonemes, because we have many minimal pairs such as sin /s? n/ and sing /s /, and also ran /r n/ and rang /r ? /. This would seem to be the end of the story, but of course it is not. s The possibility of / / Do you make a distinction between which and witch? For most speakers, these two words are homophones as they are both pronounced as /w? t? /, though many Americans do make a distinction (Wells, 1982:126), and most Copyright  © 2005 Singapore Tertiary English Teachers Society (STETS) w w w /ple ? / and measure /me ? /. But notice that jet /d et/ and barge /b? d / are perfectly good words in English. So if we were to regard /d / as a sequence of two separate sounds, we would have to say that / / can only occur near the start or at the end of a word if it is preceded by /d/, which would be rather strange. So the claim that /t? / and /d / are single sounds in English is well-founded, because they behave phonologica lly like single sounds in the structure of English words. However, one might note that Ladefoged (2001:27) does treat both these English affricates as sequences of two sounds, partly because his emphasis is rather more on phonetics than on the phonological structure of English. Scottish speakers also do (Wells, 1982:408). Indeed, it was once normal for all speakers of English to make this distinction, but by the end of the eighteenth century even educated southern speakers no longer maintained it (Mugglestone, 2003:132). For speakers who retain this distinction, it might be necessary to include an extra phoneme, with / / representing the voiceless counterpart of /w/, so that which is / ? ? / while witch is /w? t? / However, even here the analysis is not so simple. Historically, this sound was a consonant cluster /hw/, parallel to other clusters beginning with /h/, such as /hr/, /hn/ and /hl/ (Cruttenden, 2001:215). These others have now disappeared, so apart from the possibility of /hw/, the only remaining consonant cluster involving /h/ is /hj/ in words such as huge /hju d / and human /hju m? n/. And even the status of this is doubtful, as one might alternatively regard /ju / as a diphthong (Deterding, 2004). So, from a historical perspective, / / might be treated as /hw/. But from a synchronic perspective, we should note that the contrast between / / and /w/ is parallel to the contrast between many pairs of consonants in English, such as /t/ and /d/, /s/ and /? /, and /f/ and /v/. The fact that the voiceless/voiced contrast is wellestablished in English lends support to the treatment of / / as a phoneme in its own right. We might therefore conclude that some speakers do have this extra phoneme. w v w v How Many Consonant Sounds Are There in English? | 25 so it’s fun being with them [F9-f:40] In fact, extra velar plosives also occasionally get inserted at the end of words such as selling, studying and young in relatively informal Singapore data (Lim & Deterding, 2005), as shown in the following examples also from the NIECSSE corpus: selling um decorative stuff [iF9-c:83] that I was studying †¦ this [iF9-c:238] when we were young †¦ we used to erm [iF10-e:180] If a velar plosive gets inserted occasionally after /? /, maybe we should analyse it as present in the underlying representation of the word, and then instead of saying that it sometimes gets inserted, we should state that it sometimes fails to get deleted. And if this is the case, s Conclusion It is still basically true that there are 24 consonants in English, though it may under some circumstances be possible to regard /t? / and /d / as sequences of two sounds, some speakers may have an extra phoneme / /, and the status of /? / is questionable. Even though we can conclude that there are 24 consonants in English, consideration of some of the issues regarding the phonological analysis of English can give us a deeper understanding of he structure of the sound system of the language. STETS Language & Communication Review, Vol. 4, No. 1, 2005 w v v An alternative possibility is to say that words like sing have a silent / / at the end, and this silent / / gets deleted when it occurs at the end of a word (Roach, 2000:68). In fact, for some speakers of English, this deletion rule does not apply and sing is pronounced as [s ] (Roach, 2000:67), so clearly for speakers such as this, we should analyse [? ] as an allophone of /n/. Furthermore, in careful pronunciation, some speakers insert a velar plosive at the end of words such as being, and this can occur in Singapore English (Setter & Deterding, 2003) as is evident from the following utterance from the NIECSSE corpus (Deterding & Low, 2001): then the distribution of [? ] is entirely predictable, so it is an allophone and not a phoneme. Finally we might note that words such as long /l /, strong /str / and young /j ? / have no final / /, but there is a / / when a comparative suffix is added: longer /l ?/, stronger /str ?/, younger /j ? ?/. So this seems to lend further support to the possible existence in the base form of these words of a final / / which gets deleted in some circumstances. (But note that there is no / / with the –ing suffix or the agentive –er suffix: singing /s / and singer /s /; not */s / and */s ?/. ) In conclusion, we can say that, on the basis of minimal pairs, /? / is generally regarded as a phoneme of English, but that there are some counter-arguments which raise a few questions about its status. 26 | David Deterding REFERENCES Deterding, D. (2004). How many vowel sounds are there in English? STETS Language & Communication Review, 19(10): 19-21. Deterding, D. & Low, E. L. (2001). The NIE corpus of spoken Singapore English (NIECSSE). SAAL Quarterly, 56: 2–5. Ladefoged, P. (2001). A course in phonetics (4th edition). Fort Worth: Harcourt College Publishers. Laver, J. (1994). Principles of phonetics. Cambridge: Cambridge University Press. Lim, S. H. & Deterding, D. (2005). Added final plosives in Singapore English. In D. Deterding, A. Brown and E. L. Low (Eds. ), English in Singapore: Phonetic research on a corpus, pp. 37-42. Singapore: McGraw Hill. Mugglestone, L. 2003). ‘Talking proper’: The rise of accent as a social symbol (2nd edition). Oxford: Oxford University Press. Roach, P. (2000). English phonetics and phonology: A practical course (3rd edition). Cambridge: Cambridge University Press. Setter, J. & Deterding, D. (2003, August). Extra final consonants in the English of Hong Kong and Singapore. Paper presented at the International Conference of Ph onetic Sciences, Barcelona. Wells, J. (1982). Accents of English. Cambridge: Cambridge University Press. Copyright  © 2005 Singapore Tertiary English Teachers Society (STETS)

Lecture #1 Essays - Cold War, Global Politics, Free Essays

Lecture #1 Essays - Cold War, Global Politics, Free Essays Lecture #1 Introduction: What is the Third World? Nations Unaligned with Either NATO or the Warsaw Pact Won't work; could include Yugoslavia and even the People's Republic of China The Decolonizing World Won't work; must include Egypt, Thailand, and other nations that were never colonies The Developing World Won't work; misleading in terms of power dynamics and ethnocentric The Global South Won't work; could include Australia and New Zealandand Antarctica! The "Dominoes" "Domino theory" coined by Eisenhower in 1954, anticipated by Acheson at the inception of the Cold War Presents the world as a zero-sum game in which any gain for communism constitutes a loss for democracy and free enterprise Two Phenomena Define the Second Half of the Twentieth Century: the Cold War and the Ascent of the Third World The Third World profoundly shapes how the communist and capitalist hegemons compete This competition alters the domestic environment in Third World nations Parallel struggles: the civil rights movement in the United States and Third-World struggles for autonomy Unfolding of the Cold War Conflict begins in Europe but sees its first fireworks in Asia The Middle East becomes an important theater, for strategic and economic reasons The East-West clash comes to Latin America and Africa later, but still exerts tremendous pressure on how states in those regions develop Lecture #2 "Like Apples in a Barrel . . .": Origins of the Cold War I) The Irresolvable Question of Poland The United States wants a democratic Poland, with representatives of the Polish government in exile ["London Poles"] included views Poland as an outpost of European civilization against communists The Soviet Union wants a pro-Soviet Poland, run by the puppet "Lublin Poles" views Poland as the route through which Germany has attacked Stalin breaks his promises at Yalta, clamps down on Poland and the rest of Eastern Europe Early Cold War Crises Truman takes a hard line on Poland, but ultimately has to back down Conflicting agendas at Potsdam Soviets retreat from Iran and Turkey "Support Free Peoples": Truman Sounds the Alarm Britain can no longer provide aid to the anti-communist governments in Greece and Turkey; America is Britain's obvious successor Truman portrays the struggle as one of good versus evil Congress coughs up the money; makes an historic commitment the U.S. intervenes, during a time of general peace, in the affairs of people outside North and South America "Two Halves of the Same Walnut": Truman's Guns and Marshall's Butter Economy of Western Europe seems on the verge of collapse Marshall invites the Europeans to draw up their own plan U.S. Congress opposes the Marshall Plan; Republicans don't want to give Truman a foreign policy triumph in an election year or encourage socialist schemes in Europe "A Shock through the Civilized World": The Coup in Czechoslovakia Prompts the Senate to endorse the Marshall Plan Truman drastically expands the power and discretion of the CIA Foreign Policy Setbacks of 1949 The Soviets explode an atomic bomb China falls to the communists America's Twin Responses to the Soviet A-Bomb and the "Loss" of China Truman approves development of the H-Bomb National Security Document 68 (NSC-68) Advocates a quadrupling of U.S. military spending Assumes the worst of Soviet foreign policy Demands a global U.S. response to the Soviet threat So drastic in its implications that implementation appears unlikelyuntil the Korean War breaks out Lecture #3 "The Greece of the Far East": Korea Roots of the Conflict The United States and the Soviet Union eject the Japanese from Korea in 1945, divide the peninsula at the 38th Parallel The Cold War hardens, obliterating the possibility for Korean unification Kim Il-sung heads the communist People's Democratic Republic of Korea in the North Syngman Rhee heads the anti-communist Republic of Korea (ROK) in the South Civil war rages in Korea from 1945 to 1950long before America's "Korean War" starts Why do the North Koreans invade the South on June 25, 1950? The communists are encouraged by Truman's "Europe-first" strategy and neglect of South Korea Acheson's "defense perimeter" speech also gives Kim reason to assume that the U.S. will not assist the South Stalin gives his assent to the invasion North Korea nearly overruns the South within days; the "Free World" faces a major setback Truman's "Police Action": The Inception of the Imperial Presidency Truman does not consult with members of Congress before ordering air and naval forces to South Koreaor before committing American troops to the land mass of Asia Few in Congress object, but a fatal precedent has been set Although termed a U.N. "police action," the conflict