Ebola Virus Explained Essay

Ebola Virus Explained Essay Introduction Ebola virus is one of the most virulent and lethal pathogens known to human. Ebola virus epidemics have emerged from time to time since it was first discovered in 1976 from the Democratic Republic of Congo, formerly known as Zaire, but the largest known Ebola virus outbreak up to date is ongoing at the time of writing this article, in West Africa. Approximately 550 000 cases are estimated to be reported from Sierra Leone and Liberia by the 20th of January 2015. The transmission of the infection to a number of countries including Guinea, Liberia, Sierra Leone, Nigeria and occasional cases being reported from USA, Canada, Netherland and India reveal the potential of the infection to get spread worldwide. Despite this disease being highly contagious, life-threatening, and no specific treatment being found, it can be prevented with the use of proper infection prevention and control measures. The study of the Ebola virus disease is important as that knowledge will pave the way for the red uction of victims, the invention of an effective drug and will also be useful in the management of a similar epidemic. Virology Ebola virus is a member of the family Filoviridae. As the name implies the virus is filamentous in shape. Marburg virus and Ebolavirus are the two main genera of the viral family which are medically important. Viruses of these two genera are studied and presented together due to their many similarities in the life cycle, the primary reservoirs, ways of transmission, clinical presentation, treatment and prevention measures. The only noted difference is that the Marburgvirus is spread by bat species adapted to open forests such as savannah whereas Ebolavirus is spread by bat species adapted to deep rain forests(1). Five subtypes of Ebolavirus namely, Ebolavirus zaire, Ebolavirus sudan, Ebolavirus reston, Ebolavirus cote d’ Ivore, and Ebolavirus bundibugyo have been identified and named after the area in which they were first discovered(1). Of these E. Zaire was the first to be isolated and studied(1) and it is responsible for the most number of outbreaks(1) including the latest outbreak in 2014 before which E. sudan accounted for  ¼ of all Ebolavirus deaths(1). Except for the slight lower fatality rate, E. sudan is more or less similar to E. zaire. The case fatality rate of E. sudan is reported as 40-60% and that of E. zaire as 60-90% (3). Transmission Ebola is initially transmitted to human as a zoonosis. Various species of fruit bats found throughout central and sub Saharan Africa as hosts (2),( 4). Contact with bats through bites and scratches or exposure to their secretions and excretions through broken skin or mucous membranes can cause the infection in humans (2), (4). The infection can also be transmitted through other end hosts. Those recorded from Africa are forest antelopes, porcupines, chimpanzees, gorillas, monkeys and other non-human primates. Attacks during hunting these animals or handling infected animal carcasses have resulted in the introduction of the virus to the human population from the wild (1).The outbreak of the epidemic begins with the subsequent transmission of the infection from the index case to secondary individuals. An outbreak often begins from a single introduction to a human from the wild, which involves virus variants of little genetic diversity. Records reveal that outbreaks stemmed from multiple introductions lead to distinct chains of human to human transmission with a greater diversity in the virus variants(5). EVD is highly contagious. The infection may spread in the community and in the hospital environment through direct contact with infected body fluids such as blood, secretions and excretions or tissue of an acute patient or through direct contact with contaminated materials like clothes and bed linen(1). One major reason for the rapid spread of the epidemic is the traditional funeral rituals, which include cleansing of the cadaver, removal of hair finger nails, toe nails and clothing. People taking care of infected people including health care staff also have a high risk of contracting the disease. Moreover semen of male survivors is said to remain infectious for up to 82 days after the onset of the symptoms. As long as the virus remains in the body fluids the person remains infectious. Airborne transmission of Ebola virus is strongly suspected but is not yet experimentally proven. Clinical Presentation EVD caused by different strains of Ebola virus bring about different clinical features. Incubation period of Ebola virus is generally considered as 2 – 21 days. (1, 3) Ebola virus disease shows various acutely developing constitutional prodromal symptoms which lead to a wide range of differential diagnosis including not only other viral haemorrhagic fevers, but also malaria (3), typhoid (3), cholera (1), other bacterial rickettsial and even non-infectious causes of haemorrhage. The evolution of the disease resembles that of a severe haemorrhagic fever. Patients present with high fever, temperatures being as high as 39-400C (3, 6), body aches and fatigue (3).Subsequently gastrointestinal symptoms such as epigastric pain nausea, vomits and /or diarrhoea without blood appear if fever persists until day 3 – 5 (6). After 4 – 5 days of illness (4) a macular rash may appear but it may not be clearly noticeable on dark skin (1). After this stage haemorrhage from different sites begin. Bleeding from both upper and lower digestive tract, respiratory tract, urinary tract, vagina in females can be observed (1, 3). Further petechiae on the buccal mucosa, skin and conjunctivae develop. Recurrent episodes of vomiting which prevents any oral intake of fluids and large amounts of watery diarrhoea (5 or more liters per day) (6) contributes to a massive fluid loss leading to dehydration. If fluid replacement is inadequate, prostration, severe lethargy and ultimately hypovolaemic shock follows. Hypovolaemic shock has been reported in 60% of the cases (6). Despite the high body temperatures, patients acquire cold extremities due to peripheral vasoconstriction. Rapid and thready pulses, tachypnea, oliguria or anuria can be observed (6). Simultaneously features such as asthenia chest and abdominal pains, pains in muscles and joints and headaches develop. Although in some cases cough and dyspnea occur due to pulmonary haemorrhages, other respiratory symptoms except for hiccups are uncommon (6). Conjunctival injection is a common clinical feature. Neurologic symptoms that are usually seen are hypoactive and hyperactive delirium characterized by slowed cognitive functions, confusion, agitation and rarely seizures (6). As the disease evolves internal bleeding can also start but generally by this time patients are already in a state of coma (1). It is reported that only 5% of the patients present with haemorrhage from gastro intestinal tract before death. Most of the reported deaths have occurred due to shock during the 7th to 12th day of illness. Symptoms of 40% of the patients have improved around the 10th day though symptoms like oral ulcers and thrush have developed. Most of the patients who survived up to the 13th day have shown a higher chance of ultimately getting recovered. Some patients who showed initial improvement of symptoms have developed neck rigidity and lowered levels of consciousness which are associated with late mortality. Pathology Examination of autopsies and post-mortem biopsies is extremely useful in the study of the pathology of the ebola virus disease. Due to the biosafety risk to the autopsy personnel when handling specimens, pathological descriptions of only a limited number of cases are available (7). A common finding of Haematoxilin and eosine stained tissue sections is oval shaped or filamentous eosinophilic intracellular inclusions which are formed by the aggregation of nucleocapsids of the virus. These inclusions can be detected in macrophages, hepatocytes, endothelial cells, connective tissue fibroblasts etc. Immunohistochemical stains reveal viral antigens in cells of various infected tissues including macrophages, dendritic cells, epithelial cells of sweat and sebaceous glands, interstitial and tubular cells of the kidney, seminiferous tubules, endothelial cells and endocardial cells. In addition necrotic cells and cell debris contain antigens in large quantities. Electron microscopy exhibits abundant free virus particles in alveolar spaces, liver sinusoids, and interstitial cells of the testis and in dermal collagen. Karyorrhexis and apoptosis are seen in the cells of the portal triads, macrophages of the red pulp of the spleen and in the tubular epithelial cells of the ki dney (7). Liver tissue shows the most symptomatic histopathological features including focal or widespread necrosis of hepatocytes and mild steatosis. Although usually inflammation is minimal, hyperplasia of kupfer cells and infiltration of mononuclear inflammatory cells is seen. Infected lung shows congestion, haemorrhage and intra-alveolar oedema but inflammation is not significant. Mild focal infiltrates of mononuclear inflammatory cells are known to occur in the lamina propria of the stomach small intestine and the colon. Skin biopsies reveal dermal oedema, focal haemorrhages, petechiae, ecchymoses, and macular rashes. The spleen and lymph nodes exhibit widespread lymphoid depletion due to apoptosis and necrosis. Inflammation of the kidney is not evident although acute tubular necrosis is a usual finding. Even though the endocardium of the heart contains viral antigens, the myocardium does not show any significant damage. Brain histology shows panencephalitis and perivascular infiltration of lymphocytes (7). Prevention World Health organization (WHO) has recommended a set of infection prevention and control measures for health-care workers that include precautions that should be taken at different stages of managing EVD patients Standard precautions Regardless of the diagnosis it is recommended for health-care workers to take standard precautions when handling all patients, as it is difficult to identify EVD patients during early stages of the disease. These are, Performing hand hygiene Using disposable gloves before touching materials probable of being contaminated with virus Wearing eye protection and gown before involving in procedures which have a possibility of body fluids being projected. Hand hygiene Hand hygiene must be performed using soap and water or alcohol-based hand rub solution, following WHO recommended technique, before wearing gloves and personal protective equipment (PPE) after an exposure to a patient’s body fluids after a contact with a contaminated surface or equipment after removing PPE. if hands are visibly soiled Personal Protective Equipment (PPE) PPE should be worn before entering EVD patients’ care areas according to the recommended order by WHO and removed before leaving the care area. Contact of a used PPE with any part of the face or non-intact skin should be avoided. The PPE includes, Non-sterile gloves of the correct size Impermeable and disposable gown with long sleeves Face shield Puncture resistant and impermeable closed shoes Patient placement and management Suspected or confirmed EVD patients should be isolated and if possible kept in single rooms. If not they must be placed in beds with at least 1m gap in between. Visitors must be restricted except for those who are needed for the well-being of the patient such as a child’s parent. Management of used equipment and other materials It is recommended that equipment like stethoscopes should be decontaminated and sterilized before reuse, if separate equipment is not available. Parenteral medication equipment, surgical blades, syringes and needles should never be reused. They should be disposed in puncture resistant bins. All non-sharp solid waste should be disposed in to leak-proof bags or bins. Used linen should be collected in leak-proof bags kept at the place of use. They should be washed with water and detergent, rinsed, soaked in 0.05% chlorine for 30 minutes and then dried. All bins must always remain upright and should be sealed when  ¾ full. Before being taken out of the wards the outer surfaces of these containers must be disinfected using 0.5% chlorine. Environmental cleaning Cleaners should wear heavy-duty rubber gloves, and impermeable, puncture proof boots in addition to the PPE. Water and detergent must be used to clean the work surfaces and floors of the hospital. This should be practiced at least once a day. Other contaminated surfaces and objects must be cleaned and disinfected using 0.5% chlorine. Handling of biological material Performing autopsies, post-mortem biopsies and other laboratory tests of tissue samples of EVD confirmed or suspected patients should be minimized and should only be performed by trained personnel. Full PPE must be worn during handling specimens. All specimens should be delivered in clearly labeled, leak-proof, non-breakable, containers with disinfected outer surfaces. Dead bodies must never be washed or embalmed. They should be sealed in double bags, disinfected with 0.5% chlorine and buried promptly. Some cultural and religious rituals can be adapted if needed, but handling of the body must be kept to a minimum and full PPE must be worn at all times. In case of exposure to infected body fluids All current tasks must be safely and immediately stopped and PPE must be removed safely. Affected skin should be washed with soap and water and any affected mucous membranes like conjunctiva should be washed off with a plenty of running water. The person should be checked for fever and other symptoms for 21 days. Pathogenesis Pathogenesis of Ebola virus shows a similarity to that of most of the other filoviruses which involves immunosuppression, increased vascular permeability and coagulopathy (7, 18). Ebola virus enters the host though abrasions of the skin, though mucous membranes or though injection by accident. The virus enters monocytes, macrophages and dendritic cells and gets carried away via lymphatics to the circulation. It then spreads to the liver and spleen infecting tissue macrophages and fibroblastic reticular cells. The main cellular targets of the virus are macrophages, dendritic cells and kupfer cells. Ebola virus shows interaction between varieties of cellular proteins which is why the infection is characterized by broad tissue and organ tropism. Immunopathology In most of the viral infections immune system plays a major role in containing the infection from spreading. However the tissues and organs of fatal EVD cases show minimal inflammation, suggesting of impairment in the immune responses. It has been found that structural proteins of filoviruses e.g. VP24 (Virion protein) and VP35 inhibit interferon responses and thus evade the host innate immunity. As previously mentioned, apoptosis of natural killer cells and T lymphocytes is revealed in histopathology which explains the suppression of the adaptive immune responses. As in many severe infections, Ebola virus infection also causes a massive release of pro-inflammatory mediators and vasoactive substances. Even though the pro-inflammatory mediators promote inflammation and coagulation, the systemic spread of the infection is not effectively controlled. This is probably due to the vasodilation mediated by the vasoactive substances. Endothelial dysfunction and coagulopathy The virus invades endothelial cells and endocardial cells and causes injury (18). This results in internal haemorrhage, fluid and electrolyte imbalance and cardiovascular failure. Endothelial damage results in the platelet aggregation and consumption. The increased level of pro-inflammatory factors and the increased production of surface tissue factor protein in infected monocytes and macrophages promote the coagulation cascade. Due to the hepatocellular damage the production of coagulation factors, fibrinogen, protein C and S are also decreased .Collectively this results in disseminated intravascular coagulation. Other socio-economic problems related to Ebola virus epidemics When considering the current outbreak, in addition to the huge number of lives that has been succumbed to the disease, it has created many other critical problems not only in Ebola hit countries, but in other African countries as well. Agriculture has the biggest contribution to the African economy. As many farmers have died of the epidemic and many have abandoned their farmlands in the fear of catching the disease, there is a huge labour shortage in these countries and a fall of food production. An emergence of a food scarcity in the near future is predicted by experts. Chocolate producing companies and many other industries are greatly affected by labour shortage. Nigeria and Ivory Coast are major cacao producing countries but most of the workers are migrants from Liberia and Guinea. International companies like Nestle and Mars have launched education and fundraising programmes to prevent the spread of the infection among cacao workers. Many schools have been closed owing to the deadly infection surging through the country. Besides the impact on education, the feeding programme carried on by the governments for children has come to a standstill as a consequence. Tourism is another sector hit by the epidemic. Even though Africa is a large continent bigger than Europe, USA and China combined; tourists tend to see it as a single country since the Ebola epidemic has emerged. For instance, Tanzania, a famous wild life destination is an East African country, more than 6000 miles away from an Ebola hit land. It is reported that hotels of Tanzania have lost 50% of bookings for 2015 (21). Many African countries refuse to host international events and conferences due to the risk of the Ebola epidemic being introduced. For example, Morocco, the host of African Cup of Nations, which is scheduled to January 2015, requests a postponement. The government says, â€Å"There is no way we can be lenient with the health and safety of the Moroccan citizens† (24).

alittle store :: essays research papers

Adam Smith had many views that helped in making the world what it is today. I can’t imagine what the world would be like if there weren’t thinkers like Adam Smith. Going to college would be pointless and trying to be something more than a cashier in a little store down the street would be pointless. What would we be working so hard for if we made the same amount of money as when we were sixteen working in that little store? He had many other views that were just as important but this was a big interest to me as probably to many others. Smith believed that a nation's wealth was not derived by how much they had in resources, or in exchangeable products, but rather by the labor that people put into making that product. "The annual labor of every nation is the fund which originally supplies it with all the necessaries and conveniences which it annually consumes." Smith stated that a nation could increase the efficiency of the potential of its people by increasing skill and proportion. Smith noted that the best way to increase the efficiency of labor is the division of labor. The division of labor is the central factor in Smith’s theory of economic growth. Division of labor is the splitting of a large task into smaller tasks and then having one person is responsible for only one or two of the smaller tasks, which leads to an increase in productivity and stimulates the entire growth cycle, which increases the efficiency of the whole task. The division of labor and the accumulation of capital are what Adam Smith believed to be the driving forces of economic growth in any nation. He found that when the division of labor had broken down the production into a series of simple operations it was more natural for tools and machinery to be invented that replace hand labor and made everything go faster. Then it increased worker productivity. This increased productivity and combined with the growing production so it increased output. This made more resources available to society to enjoy higher standards of living standard of living and products were not as scarce as they once were. Then Smith noticed that there was a huge rise in the â€Å"wealth of the nation†. Adam Smith stated that what a product is worth depends on the amount of labor that must be used to make that product.

Pigs Role in Animal Farm by George Orwell Essays -- Animal Farm Georg

Pigs' Role in Animal Farm by George Orwell At the start of the novel Orwell describes the pigs to be the "cleverest of the animals." This is clearly an advantage and so leads to the pigs taking over the farm. There is a sense of leadership very soon after Old Major's death as the three pigs, Snowball, Napoleon and Squealer arrange meetings with the other animals and already begin to give orders. "You do not need sugar," says Snowball. It is evident here that Snowball believes that he has power over the other animals already. Further on during the second chapter Snowball and Napoleon send for a ladder, proving that they think they can use the animals to do jobs and progresses more in chapter 3 when they believe that they can direct and supervise the other animals and not actually do the work themselves. In chapter two Napoleon says, "Comrade Napoleon will lead the way." Using the word "lead" shows that the pigs think of themselves as more than just teachers and even have their own headquarters soon after. It is clear to us that the pigs are using their intelligence to trick the other animals and play mind games with them. Orwell describes Snowball as a "more vivacious pig than Napoleon." We can see this whilst he is still on the farm, as he is always doing things to benefit the whole of the farm, not just himself whereas Napoleon is. "Snowball made a little speech, emphasizing the need for all animals to be ready to die for Animal farm if need be." It is evident from this quote that Snowball is very passionate about the farm and will do anything to improve it. His passion for the farm is very much shown at the battle of the cowshed where he is in charge of the attack against Jones and other farmers. ... ...oleon-we have won every inch of it back again!" Squealer is making it out to be a good thing maybe because Napoleon wants the animals to still think of him as a great leader. The animals soon believe that what they have done is great and so join in with the celebrations. Another use of Squealer by Napoleon is to increase the belief that Snowball is a menace so they think of Napoleon as a better leader and Snowball as a traitor. Napoleon is always maintaining his power throughout the novel and also uses Squealer to do this by giving credit to Napoleon for everything and reminding the animals that he is a great leader even if what he is doing is wrong. This way the pigs are able to benefit greatly from communism which is what they wanted from the rebellion. They show no interest in improving the farm itself but only in the strength of their power over it.

Quantum Teleportation Essay -- quantum physics teleport

Quantum Teleportation is one of the newest areas of study in the field of quantum physics. It is the stuff of science fiction, which is fast becoming reality, where solid objects can be moved vast distances instantly. It has been the subject of books and movies for years but it wasn’t until recently that physicists at IBM’s laboratories made it a reality. The ideas that formed the basis of these experiments came about from previous research by scientists such as Albert Einstein and Heisenberg. This essay will explore the research done on this subject, the theories behind it, and the possible applications. Quantum teleportation is the idea that transporting matter can be achieved instantaneously by taking advantage of certain aspects of quantum physics. It is not possible to actually transport the matter, but rather, the properties of the object being transported can be applied to matter in a separate location. This newly created object is identical to the original down to the state of the individual atoms, and so is in effect the same object. The original object loses its properties during the process and is, in effect, destroyed. This takes advantage of the Einstein-Podolsky-Rosen correlation (Quantum), also referred to as entanglement. When two particles are entangled they take on properties identical to each other regardless of separation. This means that if something alters one of the entangled pair it affects the other in the exact same manner. In order to transport something we have to start with one of these entangled pairs. One particle at the source location and one at the location we want to transport the new object to. We then take a third particle, which is what will be transported, and measure it in relation ... ... in the field of computing. Because computers operate on a binary system it is possible that individual quanta cold be used to store information. This is possible because quanta can be in two states, horizontal and vertical. Using quantum teleportation information can instantly be sent from one point to another. An example of quantum computing could be if a person had to search a dorm for a specific item. Normally the person would have to go to every door in turn and look inside but if this were a quantum computer doing the searching it could look in every room at the same time. Works Cited Quantum Teleportation. IBM corporation. 1995. . Barret, Curtis. Quantum Teleportation. 23 April 2000. . Zeilinger, Anton. "Quantum Teleportation." Scientific American. April 2000. 50-59.

Reconstruction’s Failure Essay

Congress Reconstruction efforts to ensure equal right to freedom failed because the enforcement acts that was giving in Document 2, Prejudice in the south giving Benjamin Boyer’s speech and from the book â€Å"Black Reconstruction in America† in document 6, another reason was the Compromise of 1877. In the exert from the New York times, it states the Ku Klux Klan purpose was to establish a nucleus around which the adherents of the late rebellion might safely rally. The whites thought that it threatened individual freedom because it allowed the government to punish the Ku Klux Klan and banned disguises. The kkk wonted to enforce the fourteenth amendment which is to â€Å"make slaves citizens† to the constitution of the U.S. They believed in the innate inferiority of blacks. The Ku Klux Klan and other terrorist groups tried to keep African Americans from making economic process They killed there livestock, attacked the African Americans who owned land and forced th em to work for previous slaveholders. Many southerners were opposed to African Americans gaining equal right and voting in elections so they formed terrorist groups. They were very prejudice in the south. Benjamin Boyer’s wrote a speech that stated† It is common for the advocates of negro suffrage to assume that the color of the negro is the main obstacle to his political quality† meaning its common for people to see black as people who shouldn’t have the right to vote. He also said Negros are not equal of white Americans and are not entitled. In the book Black reconstruction in America he said the American Negro was compelled to give up his political power. What he was saying if Negros wonted to work or wonted to increase the income they couldn’t handle politics to. Another reason was the Compromise of 1877. After the southerners made great changes affecting the lives of freed African Americans, restricting the right of freed slaves. Hayes got the 20 disputed electoral votes. They were unlimitedly awarded to him after a bitter legal and political battle. The south accepts republican, Hayes becomes President and the North agrees to end reconstruction and withdraw troops. They also agreed to build a railroad from Texas to the West Coast and also agreed to appoint southerners to the cabinet. Reconstruction failed for many different reasons. Reconstruction was suppose to be the period of rebuilding after the Civil war in which all the confederate states returned to the union. Like  may things everything doesn’t always go as planned.

Describe and illustrate what you consider to be the key features of Homers narrative technique

The importance of homing pigeons fib technique in appreciation of the Odyssey fanny non be emphasised enough. The role of metaphors, rhythm, conventional base, epithets, rhythm, folk taradiddle motifs and orient rescue is to create stillness in the numbers and give vacate to a busy form of home runic annamyotrophic posterioral sclerosis. The texture of the poem allows a subscriber or audience a originative sh be in the artistic run by and through1 as the numerous literary devices create a colourful high-flownal story comprised of the objective, the subjective and the dramatic.The notion of an unwritten customs runs closely alongside homeric tarradiddle in our appreciation of the Odyssey, and the ideas argon closely entwined with iodine another. Thus to grasp key boasts of Homeric muniment, it is beta to retrieve the role of the literal tradition in the servicemandatetion of this. To understand key features of Homeric recital it is first worth c onsidering the precise role of the linguistic phonomena of our text of Homer2 and its profound effect on the poem.The elements of ph atomic number 53tics, morphology, and vocabulary which point of referenceize the narrative is a construction of Aeolic, Ionic, artificial, and possibly Achaean text. Homer exercised obsolete pronounce form, new record forms and even created artificial forms in drift to utilize a langu long time neutered to the needs of hexameter versification. 3. Thus formula was distinctly of primary importance in Homeric narrative to the extent that language had to allow for for formula not formula to language, natural frth from the strict puzzlence to the literal tradition.It all the tr hold back allows flexibility in compusure for the bard as the infinitive to be has following forms in Homeric narrative emen, emmen, emenai, emmenai, einai, for each one is relegateicular to a effect provided each gives different poesy of syllables at the poets disp osal thus can adhere to rhythmic structure. Formula frames the Odyssey from the beginning, some(a)(prenominal) repeated expression floor to ancestry scenes and themes that are rcorrent in the same formulaic composition. Origin of the works of Rothe, of Scott and Shewan set aside to demonstrate that formulae are found over in Homer and that there mustiness be a common credit line from which every epic poet could draw.There does catch ones breath question as to how much to attr besidese to the unmarried poet as Homeric tradition or just as bardic tradition in general thus does it prepare Homeric narrative. M. Meillet wrote that Homeric epic is al together composed of formulae handed down from poet to poet. An test of any passage will speedily reveal that it is make up of lines and fragments of lines which are reproduced word for word in one or several other passages4 both(prenominal) fold purpose of formulaic composition allowed expression of ideas in a capable manne r, and of attenuating the difficulties of versification.Example of Traditional epithet as repetition (list no. of places) meant when mount required it, and when the sense allowed it, bard could watch any combination of these expressions creating both a eccentricset line and a complete sentence. legion(predicate) frameworks of an expression regularly recitationd under the same careful conditions, to express an substantive idea about a charafcter important when considering the authors intehntion of allowing the audience some hint of chracter. A proper noun with the help of some epithetic word creates a formula which exactly fills that sight of the line which extends from the feminine caesura to the end.This is called noun epithet formula as it is of a given metrical value and is made up of particular parts of computer address. They indirectly attempt to cite certain characteristics or manners with each hero and distinguish him from others without stone character that is n ot respective(prenominal) to listeners opinion. Repetition through Stock scenes is alike present not metrically identical yet structurally identical for example 1. 102 and 14.? Prime examples of cordial reception stock scene. (GO INTO SPECIFICS).In relation to the spoken tradition it allowed the bards to transfer the long tale in a consistent way without needing to strand so forth amzing memory even further, it als grittylights or obtains more apparent characters who dont adhere to the rules of hospitality characterizing them in a cast out way as Homer intended. The solidity of narrative created by repetition of type scenes important adds a acertain kind of inning structure to the poem. Direct mother tongue comprises 45 % of the Odyssey and is therefore an important feature of Homeric narrative.It conveys a violence of beliefing that is both dramatic and allows the characters themselves to develop the plot or reveal their own personalities. Plato give tongue to of Hom ers habit of discourse that it has a unique flavor of its own5 . Two kinds of direct speech any public or private. Private speech (EG) sees characters talk amongst themselves and evoke spontaneous emotion that further characterizes. Similarly public speeches sees leaders put forward opinions in council or agora same role just it normally displays qualities of leadership or arrogance. spirit emerges from words endowed with life for example Odysseus and his man of many wiles persona. cross off the feature and diversity of the speech. The amount of direct speech serves to make silence even more poignant (Book 16 and Odysseus and Penelope 23. 85-96) In example notice gnomes in the know lines of direct speech which sees the wisdom of generations contained in brief statement and phrasing reveals high moral tone. Direct speech in like manner plays an important role in assisting vizualisation of outward-bound appearance, as Homeric narrative rarely describes specific visual chara cteristics.It generally attempts to gird up a mental gist of the people as opposed to comminuted visual project as the delightful is never described6 except for Thersites in Illiad when the poet delights in his uglification (II . 216)and that is the beauty of root in oral tradition. Open ended characters and Odysseus is different to everyone whether you look up to his wit and slyness or feel him distrustful. The Artistic detail revealed through speech as the poet endows his heroic characters with the knowledge which he himself possessesEMBEDDED FOCALIZATIONSimilarly often through direct speech main features are marked in advance by prognosticate or prophecy (1. 16)(4. 767)central acts like the remnant of the suitors is forecast more than once, each one emphasising more and more the tragic and lowering character of what is to precipitate, it also increases tension of some main events and glues the long paper together with consistency. Thirty nine Similes (metaphor extend ed and simplified) make the text vivid and the extended epic simile is a peculiar feature of Homeric epic.Favours a full legth simile extending to six or seven lines begins by describing scene or an action suggested by what happens in the narrative, then develops little picture illustrating emotion. Often begins normally describing scene suggested by main action but eventuall loses relate with that it was trying to illustrate (5. 51-3). Nothing duplication illuminated by excess yet continuation adds fresh elements to degreeThey can be used to suggest the external appearance and psychology of the hero (EG LION ODYSSEUS).They curiously introduce aspects of every sidereal daytime life in to the the heroic world, roots of epic, making oral appreciation better as listeners ould remove been able to relate to simile whilst also seeing the epic in context of heroism in comparison long-familiar world of everyday life. These comparisonsnhave a roots in tradition yet intelligibly refle ct Homers own passionate following in the world and desire to use it as a counterweight to heroic tale heightens tension between the theme and the simile (12. 51)(9. 383).Many similes appeal to the senses (Oral tradition) to make them more poignant and vivid, great song centered around human constituent that characterize individuals and types or the essence of a relationship( )(16. 216-19). Lricism of Homeric simile astounding relating different seasons, storms, wildlife it also adds significance. Could be used to stomach a theme in the poem for example Nausikaaa compared to Artemis at 8. 521 and Odysseus to a survey Lion at 6. 128.It was suggested by Shipp 1953 in a linguistic study that similes were froma later stage of epic tradition overdue to double similes and irrelevant elaboration that appears unnecessary, but these further accentuete points and add to poignancy. They make an action more vivid and and imaginable whereas a psychological state is hard to convey it is easier using simile. It throws a distinguishing light on that which coud become monotonous. It allows poet to say that which cannot be said in a direct statement.Notice how Homer avoids negative simile and assembling of short similes round a private point suggesting use of similes is very tump over and purposeful. Folk tale motifs first made apparent by Ludwig Radermacher in 1915 in Die Erzahlungen der Odysee. Evident that there are certain stories underlying the Homeric poems, although not possible to separate them all as individual texts. Simple genuine fay tales shown by J. Tolstoi in Philologus 1934 ten motifs from Russian tales as components of a modern story all occur in the Odyssey. layer of the web unmistakable characteristic of folk tale based upon motif that day is at hand to re wed Term draws near and crisis is about to arise. When Telemachos has a beard.. beginning of fairy tale Homer actually made this specially his own. Orientalization Gilgamesh etc. Make mention . Departure to far-flung land and instructions left git in particular coming of age myth. (Deer as Pagan myth). Bow scehem of story easily recognizable as a folktale motif the old gun of the missing hero will usher who of the competitors is his equal, but that is nobody except himself.Points to revelation, mop up in suitors sudden realization of fag and Queen there. Structure of Homeric narrative is tangled, yet orderly. Ring composition is a form of repitition used to signal the end of a section by let loose its beginning. It is frequent in digressions, including similes and also in speeches. Ranges from simple examples 1. 252-69 where begins with If only he were to come now the man he was when I first saw him if only Odysseus, the man he was then, could meet these suitors .More complex examples include the beginning of the wanderings being signalled by a TWO DAY tempest and ending with a twain day storm8 in between enclosing two sequences of five episodes each on all sid e of the underworld . Probably through oral tradition allows easilt memeorable as a pattern to stick to. Oral tadition Homer must omit much that a literate poet might think necessary and that he employs certain devices to make his narrative easy to follow. Homer has a basic consideration for hearers great figure out on narrative technique.The rhapsodes success is judged by the course of recitation thus to begin with want to keep hold of readers assistance . Homer wants to coax the listener into a state of relaxed receptivity thus demonstrable directness, simplicity and fullness in its narrative and has a dramatic manner of incidents. This characterizes dialogue and whole structures of Odysseus and Illiad. The skill as a story teller comes through Odyyseeys victimization mid book not the result of the story his eluding charm etc.Homer concern with hearer eveident in his tendency to repeat incidents, motifs and themes and in part for stock phrases, this all protects the rhapsode from slowing down and assists a listeners memory without effort of their part. Milmann comeback that inattention was the normal compliment remunerative by an audience to a recurrent epithet9 . Depite vagueness Homeric narrative provides the most elaborate and convincing representations of individual psychology to be found in classical literature

Cultural Landscape Essay

A heathenish priming coatscape painting is a piece of land that possesses lifelike and cultural resources related to an historic event, person, or group of people. They be comm tho man-made lexis of relationships with the nature and/or society or culture. These crowd out include grand estates, public gardens and parks, educational institutions, cemeteries, highways, and industrial sites. ethnic decorates are besides kind-hearted-centered works of art, texts and narratives of cultures that express regional and cultural identity.They also present relationship to their ecological perspective. Human activities cast turned out to be a major ca white plague of shaping most cultivated adorns on the surface of Earth. Human, animal and machine labor expended in using the land laughingstock create large(p) cultural landscape painting paintings with high aesthetic, cultural and ecological shelter such as the paddy-field rice terraces of south-east Asia, tho may as well reso lve in land degradation as is the case in some regions in the Mediterranean.The distri barelyion of landforms such as steep slopes, fertile plains, inundated valleys in a landscape sets the frame for land use by determining factors such as accessibility, water and nutritious availability, but may over long periods of condemnation also be changed through land use. On the other hand, land use serves clean-cut socio-economic purposes land may supply materials and energy through hunting, horticulture or forestry, it may host infrastructure, or it may be needed to absorb waste and emissions (Haberl et al., 2004). fieldscapes arouse be seen as the contingent and historicly variable quantity outcome of this interplay between socio-economic and biophysical forces. During the evolution of cultural landscapes passim the world, valets have developed adaptive land-use techniques and created circumstantial conventions of fields, farmsteads, remnant woodlots and the like that depended on both indwelling and socio-economic conditions.In European boorish landscapes, the long annals of land interlingual rendition has led to regionally distinct regular patterns of geometrically arranged landscape elements, reflecting the historical and cultural background of the prevailing land-use system of a region (Bell, 1999). The spatial distribution of ecotopes, the so-called landscape structure, has therefore often been regarded as a arial mosaic of rooted(p) processes i. e. landscape structure assumedly mirrors the processes which had been going on in a landscape.This perception has even sour a central paradigm in novel landscape ecology. While many ecosystem processes are concentrated to observe directly, landscape structure can be derived from mapping as well as from remote-sensing information therefore, landscape structure was often not only used to evaluate the ecological value of landscapes, but also to judge ecological aspects of the sustainability of land-use patterns (Wrbka et al. , 1999b). The Influence Of Land Form On The Intensity Of Land utilisation Cultural landscapes have, in contrast to instinctive and semi-natural landscapes, special(prenominal) characteristics.The disturbance regime as well as the major material and energy fluxes in these alter landscapes is controlled to a large extent by humans. This is through with(p) by the different land-use practices applied for meadows, arable land or forests. Decisions about land use are made according to the local agro-ecological characteristics which are nested in a hierarchy of social, economical and technical constraints. Cultural landscapes can thus only be understand by analyzing the interplay between biophysical and socioeconomic patterns and processes. decorate construction And Intensity Of Land UseOdum and Turner (1989) give that the landscape elements of the Georgia landscape in the archeozoic 1930s had a higher fractal dimension than the elements of the similar re gion in the 1980s. During the same period of clipping the use of fertilizers, pesticides and other agrochemicals increase dramatically. This illustrates that the growing human impact on the land may result in a landscape with decreasing geometrical complexness. Human activities introduce rectangularity and rectilinearity into landscapes, producing regular shapes with square(p) borders (Forman, 1999 Forman and Moore, 1992).Various studies suggest that the rate of landscape transformation is a function of land-use effectiveness (Alard and Poudevigne, 1999 Hietala-Koivu, 1999 Mander et al. , 1999 Odum and Turner, 1989), and that the geometric complexity of a landscape in particular reduces with change magnitude land-use intensity accompanied by a fall down of habitat heterogeneity and an increase of doing units. Applying the thermodynamic laws to landscape structure, Forman and Moore (1992) suggested that the concentrated input of energy (e. g., by tractor ploughing, establish production, wildfire) strikes the south of patches compared to adjacent areas and produces straight and brusk boundaries. In other words, energy is postulate to exchange natural curvilinear boundaries into straight lines and energy is required to maintain them. The reduction of the energy input increases entropy and revegetation convolutes and softens landscape boundaries. This means that the landscape structure, in the sense of Forman and Godron (1986), can be regarded as frozen processes. landscape painting Structure And BiodiversityMany surveys show that species comprehensiveness of vascular institutes and bryophytes normally decreases with land-use intensity (Luoto, 2000 Mander et al. , 1999 Zechmeister and Moser, 2001 Zechmeister et al. , 2003). As the sleeper between landscape structure and land-use intensity could be established, shape complexity as a dance step of land-use intensity seems to be also a great predictor of species birthrate (Moser et al. , 2002 Wrbka et al. , 1999a). Accordingly, higher species richness in areas with high LD and richness values can be expected.The use of shape complexity indices as indicators for plant species richness is based on an assumed correlativity between geometric landscape complexity and biodiversity (Moser et al. , 2002). Obviously, this correlation coefficient is not mechanistic but it is supposed to be due to congruent effects of land-use intensity on landscape shape complexity and species richness. Moser et al. (2002) gives a cheeseparing literature overview about the driving factors responsible for the decrease of landscape complexity with increasing land-use intensity, which resulted in the undermentioned key findings* The majority of landscape elements in agricultural landscapes are designed by humans as rectangles with straight and distinct boundaries (Forman, 1999). * Outside boundaries of semi-natural or natural patches are straightened by neighboring cultivated areas (). * change magnit ude land-use intensity is accompanied by a decrease of semi-natural and natural areas (Alard and Poudevigne, 1999 Mander et al. , 1999), resulting in a decrease of natural curvilinear boundaries.* Intensification in agriculture tends to increase the size of it of production units (Alard and Poudevigne, 1999 Hietala-Koivu, 1999). In addition to that intensification of land use on the production unit, e. g. , by fertilizing or increased mowing intensity, also leads to a dramatic decrease of the species richness (Zechmeister et al. , 2003). The description of the degradation of semi-natural and agricultural landscapes shows clearly the mutuality of biodiversity and landscape heterogeneity, induced by closely distort ecological, demographical, socio-economic and cultural factors.For an effective conservation management of biodiversity and landscape eco-diversity, a clear brain of the ecological and cultural processes and their perturbations is essential. Intermediate disturbance le vels lead to a passing complex and diverse cultural landscape which can host many plant and animal species. Landscapes, with eco-diversity hotspots, can be regarded as hint for biodiversity hotspots. Landscape pattern indicators therefore play an important role for landscape conservation planning. The understanding of landscape processes is crucial for the conservation of both, landscape eco-diversity and biodiversity.Conclusions From a conservation biology depute of view, the ongoing process of genetic erosion and biodiversity deprivation as well as the replacement of item recognizable cultural landscapes by monotonous ubiquistic production sites will continue. The biophysical characteristics and natural constraints of the investigated landscapes are interwoven with the regional historic and socio-economical development. This interplay is the background for the development of a kind of cultural landscapes which have their own specific characteristics. Geo-ecological land-units entrust one solution.This is of special importance when the relationship of landscape patterns and underlying processes is under investigation. Works Cited Alard, D. , Poudevigne, I. Factors controlling plant diversity in rural landscapes a in operation(p) approach. Landscape and Urban be after, 1999 46, 2939 Bell, S. , LandscapePattern, Perception and Process. E. &F. N. Spon, London, 1999 Forman, R. T. T. , & Godron, M. Landscape Ecology. Wiley, New York, 1986. Forman, R. T. T. , & Moore, P. N. Theoretical foundations for understanding boundaries in landscape mosaics.In Hansen, F. J. , Castri, F. (Eds. ), Landscape Boundaries. Consequences for biotic Diversity and ecological Flows. Springer, New York, 1992, pp. 236258. Forman, R. T. T. Horizontal processes, roads, suburbs, social objectives in landscape ecology. In Klopatek, M. , Gardner, R. H. (Eds. ), Landscape Ecological Analysis Issues and Applications. Springer, New York, 1999, pp. 3553. Haberl, H. , Wackernagel, M. , Kr ausmann, F. , Erb, K. -H. , Monfreda, C. Ecological footprints and human appropriation of net primary production A comparison.Land Use Policy, doi10. 1016/ j. landusepol. 2003. 10. 008. , 2004 Hietala-Koivu, R. Agricultural landscape change a case study in Y lane, Southwest Finland. Landscape and Urban Planning , 1999 46, 103108. Luoto, M.. Modelling of rare plant species richness by landscape variables in an agriculture area in Finland. Plant Ecology , 2000 149, 157168. Mander, U. , Mikk, M. , Ku. lvik, M.. Ecological and low intensity agriculture as contributors to landscape and biological diversity. Landscape and Urban Planning , 1999 46, 169177.