Elasmotherium Facts and Figures

The largest of all the prehistoric rhinoceroses of the Pleistocene epoch, Elasmotherium was a truly massive piece of megafauna, and all the more imposing thanks to its thick, shaggy coat of fur (this mammal was closely related to the contemporary Coelodonta, also known as the woolly rhino) and the huge horn on the end of its snout. This horn, which was made of keratin (the same protein as human hair), may have reached five or six feet in length, and was likely a sexually selected characteristic, males with bigger horns able to better attract females during mating season. For all its size, bulk and presumed aggressiveness, though, Elasmotherium was still a relatively gentle herbivore--and one well-adapted to eating grass rather than leaves or shrubs, as evidenced by its almost comically heavy, flat teeth and lack of characteristic incisors. Elasmotherium consists of three species. E. caucasicum, as you can infer by its name, was discovered in the Caucasus region of central Asia in the early 20th century; almost a century later, in 2004, some of these specimens were reclassified as E. chaprovicum. The third species, E. sibiricum, is known from various Siberian and Russian fossils excavated in the early 19th century. Elasmotherium and its various species appear to have evolved from another, earlier elasmothere mammal of Eurasia, Sinotherium, which also lived during the late Pliocene epoch. As to the exact relationship of Elasmotherium to modern rhinoceroses, it appears to have been an intermediate form; rhino wouldnt necessarily be the first association a time traveler would make when glimpsing this beast for the first time! Since Elasmotherium survived up to the cusp of the modern era, only going extinct after the last Ice Age, it was well known to the early human settlers of Eurasia--and may well have inspired the Unicorn legend. (See 10 Mythical Beasts Inspired by Prehistoric Animals.) Stories of a mythical horned beast vaguely resembling Elasmotherium, and called the Indrik, can be found in medieval Russian literature, and a similar animal is referenced in ancient texts from Indian and Persian civilizations; one Chinese scroll refers to a quadruped with the body of a deer, the tail of a cow, the head of a sheep, the limbs of a horse, the hooves of a cow, and a big horn. Quite possibly, these stories were imported into medieval European culture via translation by monks or word of mouth by travelers, thus giving birth to what we know today as the one-horned Unicorn (which, granted, resembles a horse much more than it does a rhinoceros!) Name: Elasmotherium (Greek for plated beast); pronounced eh-LAZZ-moe-THEE-ree-um Habitat: Plains of Eurasia Historical Epoch: Pleistocene-Modern (two million-10,000 years ago) Size and Weight: About 20 feet long and 3-4 tons Diet: Grass Distinguishing Characteristics: Large size; thick coat of fur; long, single horn on snout

Critically Consider Biological Explanations of...

The term ‘schizophrenia covers a group of serious psychotic disorders characterised by a loss of contact with reality. It comes from two Greek words: schiz meaning ‘split and phren meaning ‘mind. DSM IV (1994) estimate that the occurrence rate of schizophrenia ranges from 0.2%-2.0% worldwide. There are two main explanations of schizophrenia: the biological explanations and the psychological explanations. In this essay I will critically consider the biological explanations. These include genetics, neurochemistry, brain structure and evolution. Genetic factors of schizophrenia can be explained using studies on twins and studies on family history. With twin studies researchers want to establish the degree of concordance. This is†¦show more content†¦There was a large difference in the incidence of schizophrenia when they were adults between the two groups. The group with schizophrenic mothers were found to have a 10.3% chance of being schizophrenic and the g roup with non-schizophrenic mothers were found to have only a 1.1% chance of being schizophrenic. Kety et al. (1978) examined early-age Danish adoptees matched on gender and age. 50% of these adoptees were diagnosed as schizophrenic and 50% were not. They found that the incidence of schizophrenia was greater among the biological relatives of those with schizophrenia than those without. This is expected if genetic factors are important. They also found that the rate of schizophrenia was no different for adoptive families who had adopted a child who became schizophrenic compared to those who had adopted a child that did not become schizophrenic. This therefore suggests that environment is of little importance. However Kety et al.s (1978) study is criticised due to the fact that they drew their adoptees from 1924-1947 and gathered their statistics from a time-span of over 70 years. This means that the uniformity of the diagnostic criteria must be queried due to the change in interpretations of symptoms. Genetics can cause differences in brain chemistry and biochemistry may be important in the development and maintenance of schizophrenia. The dopamineShow MoreRelatedStrengths and Weaknesses of the Biological Model and Environmental Model in Determining the Etiology of Schizophrenia3559 Words   |  15 PagesDevelopmental psychopathology theories embody these perspectives as well, and the information from ‘normal’ and ‘pathological’ human life courses enlighten current models of development (Davies Bhugra, 2004). Thus, for instance, the healthy child and the biological model both agree that certain predetermined behavioural pattern may be impervious to environmental forces. 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The study highlights the adaptationRead MoreMental Health in Australias Criminal Justice System3547 Words   |  15 Pagesresponses to mental health cases....4 2.2.2 The court services and criminal proceedings in Australian courts†¦.4 2.2.3 The screening tools used in the criminal justice system and the effectiveness of those tools†¦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‚¬ ¦4 3.0 Explanation of Social and Legal Issues†¦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‚¬ ¦......5 3.1 Social Issues†¦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‚¬ ¦4 3.1.1 The lack of professional screening and health services in rural jurisdictions†¦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‚¬ ¦...†¦...4 3.1.2 The compromisingRead MoreUnderstanding Mental Health and Mental Illness Essay2911 Words   |  12 Pagesunderstood by the concept of mental health. 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Reasons That Lead Teenagers To Alcohol Abuse And T Essay Example For Students

Reasons That Lead Teenagers To Alcohol Abuse And T Essay heir Causes Alcohol abuse is one of the biggest drug problems and issues facing Americas youth today. Teen alcoholism is a one of the main issues concerning almost all communities, families and schools in America today. There are three main reasons that can lead a teenager to drink alcohol without taking into consideration its causes. Stress, peer pressure and media are these reasons. . The first reason teens drink is because of stress. Nowadays, teens are under tremendous stress such as school and family. For example, School stress can be caused by trying to fit in and consequently being accepted by their peers. Another reason for their stress can be attributed to bad grades. Family stress can come from families being divorced. The constant fighting or arguing in the home could make it uncomfortable for teens and in order to handle these situations, these teens turn to alcohol. Alcohol helps them escape from these problems. In addition, alcohol makes teens feel good and happy, which gives them a break from their problems. They feel that the only way for them to escape is the bottle. Therefore, they drink because it helps them escape from reality or cope with stress that can be very cruel for some teens. The second reason teens drink is due to peer pressure. Peer pressure can especially be seen in parties where mostly everyone drinks. This creates pressure on the teen because if he or she does not drink, the teen would become an outsider and consequently, they drink to belong. Many times, teens drink at parties to be accepted by the others. For example, teens would drink beer at parties and pretend that they like it even when they do not like the taste of it. They have the beer to be in the right crowd. The third reason for teens to alcohol abuse is the media and poor labeling. In todays advertisements, whether they are on billboards or on television commercials, portray a message that can create confusion. The message that they are trying to get across is that drinking make everyone cool like the people on the commercial. Media gives the message that happy, important and beautiful people drink and that if one does not drink; he or she is not cool. Poor labeling also leads to alcohol abuse among teenagers. Many teens cannot distinguish alcohol from nonalcoholic beverages because they can appear similar on store shelves. For example, stores keep their sparkling water next to the wine cooler. Alcohol causes various health problems among young people and can lead to serious health consequences. Alcohol can cause aches and pains to be lessened therefore illnesses may go undetected because the symptoms have disappeared. Also, It can cause students to be absent from school frequently. However, this a small cause compared to the others which can include date rape, violence which can lead to even death. Alcohol causes a persons judgment and reflexes to slow down. One of the most common scenarios is in driving. Drinking and driving is the number one killer in America. A person may also do things he would not normally do because his ability to reason may be reduced. In conclusion alcohol affects many teenagers lives as well as their future. Too many teens are currently drinking and alcoholism is on the rise. The disease is spreading and something must be done to solve this problem. Schools, churches as well as the alcohol industry must work together to solve this problem. They must create a curriculum which will teach teenagers to resist alcohol. .u1379e56e2d5c7c58ba2667c716a38548 , .u1379e56e2d5c7c58ba2667c716a38548 .postImageUrl , .u1379e56e2d5c7c58ba2667c716a38548 .centered-text-area { min-height: 80px; position: relative; } .u1379e56e2d5c7c58ba2667c716a38548 , .u1379e56e2d5c7c58ba2667c716a38548:hover , .u1379e56e2d5c7c58ba2667c716a38548:visited , .u1379e56e2d5c7c58ba2667c716a38548:active { border:0!important; } .u1379e56e2d5c7c58ba2667c716a38548 .clearfix:after { content: ""; display: table; clear: both; } .u1379e56e2d5c7c58ba2667c716a38548 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u1379e56e2d5c7c58ba2667c716a38548:active , .u1379e56e2d5c7c58ba2667c716a38548:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u1379e56e2d5c7c58ba2667c716a38548 .centered-text-area { width: 100%; position: relative ; } .u1379e56e2d5c7c58ba2667c716a38548 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u1379e56e2d5c7c58ba2667c716a38548 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u1379e56e2d5c7c58ba2667c716a38548 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u1379e56e2d5c7c58ba2667c716a38548:hover .ctaButton { background-color: #34495E!important; } .u1379e56e2d5c7c58ba2667c716a38548 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u1379e56e2d5c7c58ba2667c716a38548 .u1379e56e2d5c7c58ba2667c716a38548-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u1379e56e2d5c7c58ba2667c716a38548:after { content: ""; display: block; clear: both; } READ: Career Development through International Mobility Essay Say no to alcohol drink! .

Red Spots Markets Company free essay sample

How should Fosdick respond to the immediate situation? Fosdick had faced the pilferage fact at the workplace. He was the witness as clerks were walking with opened cases of sweeties, mustards, cheese, soft drinks, bread and etc. His reaction to the pilferage fact should definitely be clear and hard. He should express his surprise to these circumstances and show the disapproval of the fact by refusing the sandwich. Otherwise his decision to accept the sandwich would make him the participant of the pilferage. What controls might have been used by Red Spot Markets to reduce or eliminate the problems discussed in the case? The problem expressed in the case seems to be serious. One troublemaker involves almost the whole group of employees into the pilferage. The more terrible is that he tries to legitimize the fact like normal. To address properly this critical situation, the Red Spots needs to take corrective actions. We will write a custom essay sample on Red Spots Markets Company or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page First of all it needs to clearly articulate work rules to avoid employee engaging from unproductive and potentially disruptive work, but that isn’t still enough. To be effective the rules must be enforced. For that reason the company should communicate, enforce those rules, establish the closer control on workers and suspense any precedent of pilferage. Question N3 What longer-range steps should Fosdick take to control the operations of the  Providence  distribution center? Reading this case Bigellow seems to be the real leader in the warehouse rather anyone else. He is the person who sets the work pace in the warehouse: ,,When he felt good things hummed; when he was not feeling well or absent work dragged†. Considering these circumstances there’re much and heavy work Fosdick needs to arrange for long-term. The situation should be changed thoroughly as Tom Bigellow shouldn’t be the person who dictates rules. Fosdick should implement the proper management style and system so his manager authority should be upward rather Bigellow’s and everyone else. Question N4 What longer-range steps should Fosdick take to improve the  Providence  distribution center’s productivity? As we assume the one troublemaker involves almost the whole group of employees into the pilferage act. That’s why the worker productivity becomes lower and shrinkage appears higher respectively. Fosdick should keep himself awake and help establish the pilferage disclosure and productivity measure mechanisms. But unless Bigellow sets the rules and encourages others to disorder nothing seems to be changed. I don’t see the point why this person should be kept by the company if he arranges such problems and is the direct reason of worker productivity shrinkage. Question N5 What longer-range steps can Fosdick take to reduce the distribution center’s high rate of shrinkage? While reading the case I have such sense that company has no any proper mechanisms to react against disorder, despite the fact is obvious. Fosdick needs to alert and ensure that no any shrinkage would be endured any more. Moreover he should encourage employees not to get involved in destructive act by suggesting bonuses or other incentives as the reward in exchange of honest workers. To sum up, Fosdick needs to ensure proper supervising, disclosure and reward mechanisms to reduce the high rate of shrinkage. Question N6 Assume that Fosdick decides that the practice of free lunches from the open cases of goods must be stopped. Develop and present arguments he should give in a meeting with a union shop steward. First of all the practice of free lunch without permission is theft referred as pilferage-employee theft. That’s why the shrinkage rate is higher in the warehouse and employee productivity lowers respectively. Besides, throughput per worker hour is detected to be 4% lower than in Newburg warehouse. That’s why the Providence center is associated to be the more problematic and costly warehouse. As the reasons are important it requires immediate reaction, control and correction not to get worse even more. Question N7 Assume, instead, that you are the union shop steward. Develop and present your argument that the free lunches represent a long-standing employee benefit enjoyed by the distribution center’s employees, and that management’s attempt to stop them is a breach of an unwritten contract and will be resisted Free lunches have some advantages too. First of all, employees don’t spend money in meal and it is more motivational factor for them. Also, they don’t have to go outside; they can eat inside the company and save time. Moreover, all workers will eat together that helps to communicate, share ideas, problems and to become a friendly work group, where everybody will have same vision and goals Question N8 Much of the situation described in the case seems to revolve around the personality of T. D. Bigelow. How should he be treated? Why? For us Bigellow is very complicated person that agitates people toward disorder and pilferage. Despite his ability to get employees to work I think that he should be fired. There’re dozens of other reasons supporting our decision: Spotty attendance; Doesn’t work if he’s not on the right mood-tired or irritable; He might even sleep without carelessly during the heavy and busiest work hours; All these facts indicate to his personality as irresponsible and careless employee. Respectively, Fosdick should establish his strong management authority and replace him as far by bearing Bigellow’s caprices the company legitimizes irrelevant behavior that might become the reason of self-destruction.

Milton Obote

Milton Obote Apollo Milton Obote (some say Milton Apollo Obote) was the 2nd and 4th President of Uganda. He first came to power in 1962 but was ousted by Idi Amin in 1971. Nine years later, Amin was overthrown, and Obote came back to power for five more years before he was ousted again. Obote has largely been overshadowed by â€Å"The Butcher† Idi Amin in the Western media, but Obote was also accused of widespread human rights abuses and the deaths attributed to his governments are greater than those of Amin. Who was he, how was he able to come back into power, and why is he forgotten in favor of Amin? Rise to Power Who he was and how he came to power twice are the easier questions to answer. Obote was the son of a minor tribal chief and received some university education at the prestigious Makerere University in Kampala. He then moved to Kenya where he joined the independence movement in the late 1950s. He returned to Uganda and entered the political fray and by 1959 was the leader of a new political party, the Uganda People’s Congress. After independence, Obote aligned with the royalist Bugandan party. (Buganda had been a large kingdom in pre-colonial Uganda that remained in existence under Britain’s policy of indirect rule.)   As a coalition, Obote’s UPC and the royalist Bugandans held a majority of seats in the new parliament, and Obote became the first elected Prime Minister of Uganda after independence. Prime Minister, President When Obote was elected Prime Minister, Uganda was a federalized state. There was also a President of Uganda, but that was a largely ceremonial position, and from 1963 to 1966, it was the Kabaka (or king) of Baganda that held it. In 1966, however, Obote began purging his government and orchestrated a new constitution, passed by the parliament, that did away with both the federalization of Uganda and the Kabaka. Backed by the army, Obote became President and gave himself wide-sweeping powers. When the Kabaka objected, he was forced into exile. The Cold War and the Arab-Israeli War Obote’s Achilles heel was his reliance on the military and his self-proclaimed socialism. Soon after he became President, the West looked askance at Obote who, in the politics of  Cold War  Africa, was seen as a potential ally of the USSR. Meanwhile, many in the West thought that Obote’s military commander, Idi Amin, would be a wonderful ally (or pawn) in Africa. There was also a further complication in the form of Israel, who feared that Obote would upset their support of Sudanese rebels; they too thought Amin would be more amenable to their plans. Obote’s strong-arm tactics within Uganda had also lost him support within the country, and when Amin, aided by foreign backers, launched a coup in January 1971, the West, Israel, and Uganda rejoiced. Tanzanian Exile and Return The rejoicing was short-lived. Within a few years, Idi Amin had become notorious for his human rights abuses and repression. Obote, who was living in exile in Tanzania where he had been welcomed by fellow socialist Julius Nyerere, was a frequent critic of Amin’s regime. In 1979, when Amin invaded the Kagera strip in Tanzania, Nyerere said enough was enough and launched the Kagera War, during which Tanzanian troops pushed Uganda troops out of Kagera, then followed them into Uganda and helped force the overthrow of Amin. Many believed that the subsequent presidential elections were rigged, and as soon as Obote was inaugurated President of Uganda again, he was facing resistance. The most serious resistance came from National Resistance Army led by Yoweri Museveni. The army responded by brutally suppressed the civilian population in the NLA’s stronghold. Human rights groups put the count at between 100,000 and 500,000. In 1986, Museveni seized power, and Obote fled into exile again. He died in Zambia in 2005. Sources: Dowden, Richard. Africa: Altered States, Ordinary Miracles. New York: Public Affairs, 2009. Marshal, Julian. â€Å"Milton Obote,† obituary,  Guardian, 11 October 2005.

The Major Hickory Species in North America

The Major Hickory Species in North America Trees in the genus Carya (from Ancient Greek for nut) are commonly known as hickory. The worldwide hickory genus includes 17–19 species of deciduous trees with pinnately compound leaves and large nuts. North America has the overwhelming edge on the  number of native hickory species, with a dozen or so (11–12 in the United States, one in Mexico), while there are five or six species from China and Indochina. The hickory tree, along with the oaks, dominates the hardwood forests of eastern North America. Identifying the Common Hickories There are six species of Carya that make up the most common hickories found in North America. They come from three major groups called shagbark (which has shaggy bark), pignut (which rarely has shaggy bark), and the pecan group. The shaggy bark is a clear identifier to separate the shagbark group from the pignut group, though some older hickories have slightly scaly bark. Hickories have a nutritious nut meat that is covered by a very hard shell, which is in turn covered by a splitting husk shell (as opposed to a larger walnut that drops with a complete husk cover). This fruit is located at the twig tips in clusters of three to five. Search for them for under a tree to help in identification. They have branching flowering catkins  just below the emerging new leaf umbrella-like dome in spring. Not all are eaten by humans. The leaves of hickory are mostly alternately placed along the twig, in contrast to a similar-looking ash tree leaf that is in an opposite arrangement. The hickory leaf is always  pinnately  compound,  and the individual leaflets can be  finely serrated or toothed. Identification While Dormant Hickory twigs have tan,  five-sided or angled soft centers called piths,  which are a major identifier. The trees bark is variable along species lines and not helpful except for loose, flaky bark on the shagbark hickory group. The trees fruit is a nut, and splitting husks are often visible under a dormant tree. Most hickory species have stout twigs with large terminal buds. Growing North American Hickory Species These large, long-lived, slow-growing deciduous trees are known for being good shade trees and feature golden color in the fall. They are difficult to transplant because of their long taproot and might be hard to find in nurseries. Their bark is a range of gray colors, whether they have shaggy bark or not, and youll find them in USDA Zones 4–9, though the pecan is found in Zones 5–9. Fruit drops from late summer into autumn. Shagbark hickory tree. Roger Smith/Getty Images Shagbark hickory, Carya ovata, is as you would imagine, a tree with shaggy bark that peels away in big pieces. Their mature height is 60–80 feet tall, with a 30–50-foot width. Leaves are  8 to 14 inches long, with five to seven leaflets  These trees are tolerant of a wide range of conditions, such as drought, acidic or alkaline soil, but do need a well-drained, large location free from salty soil. The round nut has a four-sectioned husk. Shellbark Hickory bark: Carya laciniosa. DEA/C.SAPPA/Getty Images The shellbark hickory, Carya laciniosa, is a shaggy gray-bark species. This hickory grows up to 75–100 feet tall with a 50–75-foot width. Its not tolerant of alkaline soils or drought conditions, salt spray or salty soils and needs a big area of well-draining soil. Its best grown in moist soils. Leaves are in clusters of seven to nine leaflets. Oval nuts have a five- to six-sectioned husk and are the largest of the hickory species. Carya tomentosa, Mockernut hickory. Gary Ombler/Getty Images The mockernut hickory, Carya tomentosa, reaches 50–60 feet tall and 20–30 feet wide. Its tolerant of drought but not poor drainage and is best in slightly acidic soil, as its intolerant of alkaline soils and salt in the soil. Its leaves are alternate, compound leaves with seven to nine leaflets that are hairy on the underside and the stalk; the largest will be the terminal leaf.  Its nuts ripen in fall and have four sections. Pignut hickory tree. Stan Osolinski/Getty Images The pignut hickory, Carya glabra, is a dark-gray tree that extends to 50–60 feet in height with a spread of 25–35 feet. It does well in a variety of soils. It moderately tolerates salty soil and hangs in there through drought, but it doesnt do well in areas of poor drainage. As the tree ages, the bark may appear slightly shaggy. Its alternate, compound leaves are 8 to 12 inches long with five to seven leaflets, with the one on the end being the largest. The bitter nuts are pear-shaped and have four ridges on the husks, which do not easily come off of the nut. Carya Illinoensis (Pecan tree), tree with yellow leaves in park. Dorling Kindersley/Getty Images The pecan tree, Carya illinoinensis, contains the sweetest nuts of all the hickory trees and is one of the most important native North American nut trees, though it can be a messy tree to grow due to leaf and fruit drop. It grows 70–100 feet tall with a spread of 40–75 feet. Its tolerant of acidic soils and only moderately tolerant of alkaline soils. Itll handle some poor drainage all right but not drought, salt spray, or salty soil. The bark is brownish black, and leaves are 18–24 inches long, containing nine to 17 narrow, long leaflets with a hook shape near each tip. Nuts are cylindrical. Carya cordiformis (Butternut hickory), green-leaved tree.   James Young/Getty Images The bitternut hickory, Carya cordiformis, also commonly called the swamp hickory, loves moist conditions and hates drought and poor drainage, though it can be found in some drier landscapes in addition to its typical low, wet conditions. It needs a large area to grow and can reach 50–70 feet high and 40–50 feet wide when mature. It prefers acidic soil but can tolerate alkaline. It can handle some salt spray but not salty soil. Leaves contain seven to 11 long, narrow leaflets. It grows bitter nuts that, although not poisonous, to humans are more of the inedible variety due to their taste. The nuts are about an inch long and have four-sectioned, thin husks. To identify the tree in winter, look for its bright yellow buds.

Communcation Assignment Example | Topics and Well Written Essays - 2000 words

Communcation - Assignment Example Distinctive channels have diverse qualities and shortcoming. 4. Decoder: Decoder translates the encoded message to recover the original message. This procedure has to be correct and accurate, or else the message is lost completely. This encoding and decoding will be exceptionally help full in military and versatile correspondences. a) Super Low and Extra Low Frequency bands (SLF and ELF) normally occur natural. This can be very long antennae used by electricity authorities, called power lines radiating 50 or 60 Hz. The signal is experienced as hum. The largest natural source of this radio wave is the interaction between the solar wind and the ionosphere, which results in low frequency currents in the earth and oceans. They are usually studied by geophysicists to understand, inter alia, the availability of ore deposits whose electrical conductance is different from that of the surrounding crust. Like ULF (As illustrated in b) below), these bands achieve applications in communication with submarines, and uses very low information rates. b) 300 Hz - 3 kHz. Ultra Low Frequency (ULF). Water or the earth does not readily consume electromagnetic waves occurring in this range. As such, they might be utilized to communicate among or with submarines and with mines. One drawback is that, with such low frequencies, one can only be in a position to modulate the amplitude sufficiently so they cannot convey much data. This is not a disservice if the stage is needed, as is the situation for systems used for navigation. The wavelengths are long to the point that radio wires may be very long. d) 30 - 300 kHz. Low Frequency (LF). This band advantageous since waves can be propagated around the Earth, using refraction and reflections within the ionosphere or the earth surface. For this reason, these two wave channels form a waveguide for the radio waves in this range, which can hence be tapped for communication purposes across the oceans and around the world. e)