How College Students Use Wikipedia for Course-Related Essay Example for Free

How College Students Use Wikipedia for Course-Related Essay Why then are academics so wary about the use of Wikipedia within universities? There are a number of related reasons. Before outlining them we should acknowledge that there may be differences according to academic discipline in attitudes towards Wikipedia. Speaking to academics from the natural and medical sciences over the last year, it seems that those subjects are less concerned with issues of originality of source than the arts and social sciences. It also may be [pic] and this is genuine speculation [pic] that academics in the English speaking world, where most of the academic controversy over Wikipedia use has been, are more sensitive to the source than in other parts of the world. These qualifications aside, there are definite reasons why Wikipedia use is, at the very least, contentious in universities. First, it is the product of anonymous individuals rather than known authorities, Wales is quite explicit on this: One of the fastest things we’re beginning to lose is the view of the world that there are a handful of thoughtful, intelligent people that should be broadcasting their views to everyone. And then the public is some sort of crazed rabble, easily swayed by rhetoric and so forth. Now we have to have a more nuanced understanding. Wikipedia is not necessarily anti-academic but it is anti-elitist as evidenced by the short shrift given to eminent academics in debates when they expected deference (see Keen 2007, 43[pic]4). Second, the non-proprietary nature of Wikipedia cuts against academic culture which valorises the rights of the author and publisher. Third, the anonymity of Wikipedia articles is alien to the cache of the named writer of the journal article or book. Fourth, the collaborative process challenges the norm of individual creation, prevalent in the arts and social sciences. Fifth, as intimated, Wikipedia departs from the standard mode of vetting by peer review. It is not true that articles are not reviewed. On the contrary, they are scrutinised by far more editors than for any journal. However, as the contributor is generally not an academic expert, so the reviewer is not generally an academic expert. So Wikipedia rejects academic custom in the compilation of knowledge. In addition, there are a number of what might be termed ‘learning and teaching’ issues pertaining to its use within universities. First, there is the issue of the accuracy of Teaching in Higher Education 651 Downloaded by [University of Glasgow] at 05:27 12 December 2012 Wikipedia entries, something that relates to the lack of formal expertise and peer review. Reviews of the accuracy of Wikipedia entries by formal expert(s) have actually been generally positive (for natural sciences see Giles 2005; American history Meier 2008). Despite this, the suspicion still surrounds Wikipedia that it cannot be trusted. O’Sullivan’s (2009, 119) assertion that ‘most people probably have an ambivalent attitude toward Wikipedia, thankful for its existence, using it frequently, but with reservations about its total reliability’ seems valid. Some academics would no doubt sympathise with the sardonic observation of comedian Frankie Boyle that Wikipedia entries should begin with ‘I reckon’. Second, some have questioned whether Wikipedia’s determination for studied neutrality is convincing. O’Sullivan (2010) complains that as Wikipedia only displays one voice, diversity is not incorporated and therefore articles become bland. Wales’s response is unapologetic: ‘Guilty as charged, we’re an encyclopedia’ (in Read 2006). Not that his approach to knowledge is without theory, it derives rather from his admiration for the convoluted ‘objectivist philosophy’ of Aryan Rand, the Russian e?migre? philosopher and novelist (Younkins 2007). A third learning and teaching concern is that, regardless of the reliability of Wikipedia, it is in itself an illegitimate form of research. Here the thinking would be that a student who culls Wikipedia for assignments does not understand scholarship. This consists of the consideration of various sources: a judicious sifting and ordering of knowledge, rather than lifting bite sized chunks of text that purport to capture a subject. On this Wales concurs, telling students: ‘For God sake, you’re in college; don’t cite the encyclopedia’ (in Young 2006). Some universities in the US have banned Wikipedia use, whilst others recommend a more discriminating approach (Jaschik 2007; Murley 2008). The latter is what Wales and others within Wikipedia advise: it should be used only as a starting place in academic research, a references source and a revision aid. What, however, is the evidence on Wikipedia use by students and academics at universities?

Kachina/Katsina Doll :: essays research papers fc

We believe they (Kachina Dolls) are personifications of the katsina spirits, originally created by the katsinam in their physical embodiment. ..." - Alph H. Secakuku To understand the meaning of the kachina dolls, it is necessary to understand Hopi culture, because one does not exist without the other. It has been found that the Hopi's main ancestors were the Anasazi, a group of people who at about the time of Christ came to depend on agriculture. They represent various beings, from animals to clouds. They are believed to be in some form of hierarchy, a form of kingdom. Kachina dolls are depictions of masked men impersonating supernatural beings that predominate the Hopi, Zuni and Pueblo Spirit dances. These Spirits are believed to be descendants of a prehistoric people. They have lived in the Northern parts of New Mexico westward into Arizona near Flagstaff for some fifteen hundred years. To honor them they have many sacred dances throughout the year. The dolls which contain the kachina spirits are often given to children to remind them of their heritage and of their Gods. However, the Kachina Dolls are not just toys, but objects to be treasured and studied. Through these dolls they learn about Kachinas as part of their religious training and background. In Pueblo Indian religious practice, any of more than 500 divine ancestral spirits who act as intermediaries between man and god. They will allow themselves to be seen by the community if the men properly perform a traditional ritual while wearing kachina masks. The spirit painted or carved on the mask is thought to be actually present with the performer, temporarily transforming him into a Kachina spirit. The identity of the spirit is depicted not by the form of the doll, which is usually simple and flat, but primarily by the applied color and elaborate feather, leather, and, occasionally, fabric ornamentation of its mask. Also the identity of a true Kachina doll is depicted and then carved of cottonwood root. One of the purposes is to help bring the rain for the crops to grow and since the cottonwood is always found near water, the Kachinas are carved from it’s roots. The roots from which the dolls are carved are chosen with care, since they are seen to draw life and precious moisture from the earth. Very few dolls were carved out of a single piece of wood. The arms and legs and head were carved separately and glued to the torso.

Aspirin-its preparation, history and applications Essay

How drugs are discovered and developed Pharmacologist along with chemist focus on a specific disease and unmet patient needs in order to discover new drugs. They search for biological targets within the body that play a role in a given disease. Unique molecules are found or created that some day might be medicines. Lead Compound Selection, is the testing of compounds that might undergo the long expensive drug develop process. Random Screening- uses existing ‘library’ of chemical agents. This is the simplest method but the odds are low and patience is needed. Combinational Chemistry Screening- uses a compound (from existing library) as a base, then randomly adding amino acids or molecule segments of other agents to the base compound in order to enhance the base compounds activity and disease fighting potential. The enhanced compounds are then tested in rapid screening test. However this method is complex and costly but it improves the odds. Target Synthesis- targets the disease for drug intervention. For example High Blood Pressure would be studied in detail. Consequently this method still requires screening of hundreds of compounds and extensive amount of research to understand a particular disease process. Drug Modeling- uses more high technology. This method manipulates chemical structures by computers so that they can attach to, activate or deactivate proteins that interfere with or maintain the body’s normal functioning. The model is used to enhance the properties of the other methods but the cost for designer compounds are significant because of the huge amount of research that is needed to identify biochemical target and establish their molecular structure. How safety of drugs is checked before being used on the public A drug undergoes 3 clinical phases before being used on the public. PHASE 1 This is designed to determine the safety of the new drug, how best to administer it and the correct dosage- (one that will minimize desirable side effects). 20-30 patients (volunteers) are used to find out how the drug behaves in their body, so their blood and urine will be frequently monitored. Even though drugs in this will have been already tested in a laboratory. PHASE 2 After the correct dosage has been determined in phase1 clinical trial, it can enter phase2. This trial consists of determining the drug’s effectiveness in treating a specific disease. Phase2 involves more patients (volunteers) and they are tested for the number of platelets in their blood and take frequent blood samples. If the drug being tested brings a positive change in at least 1/5 of the patients then it can be tested in phase3. However if the drug shows very positive effects in-patients, the Food and Drug Administration also have the option of approving the drug for general use at this point. PHASE 3 This trial involves hundreds of patients and is divided into two groups. The control group receives a standard treatment (placebo) and the treatment groups are given the new drug. Results are then compared from the two groups. Blinded studies are used to prevent biased study results. If the new successfully passes a phase3 trial the FDA will approve the drug for marketing to the general public. . Purification -The acetylsalicylic acid is washed with distilled water until all the acetic acid is removed. -It is pressed to be as dry as possible and then dried more by a current of warm air at 60-70 degrees Celsius. The yield of pure acetylsalicylic acid is between 1780-1795kg per batch using this reaction process. * History of Aspirin and its modern development * How aspirin is prepared on the large scale Main reactor for the process- a glass lined 1500 gallon fitted with a water-cooled reflux condenser, thermometers with automatic temperature register and an efficient agitator. The Mother Liquor- 1532kg of acetic anhydride in 1200kg of toluene (this does not get used up. ). The reactor is charged up with the mother liquor. 1382kg of salicylic acid is added to the mother liquor. The reaction mixture is heated to between 85-92 degrees Celsius and kept at this temperature for 20 hours. The reaction mixture is transferred into an aluminum-cooling tank and is allowed to cool for 3-4 days. By the end the cool mixture will have reached room temperature 15-25 degrees Celsius. At this point the acetylsalicylic acid has precipitated as large regular crystals. Mother liquor is removed by filtration or centrifuging. Filtrate solution- 180-270kg of UN-precipitated acetyl acid, 510kg of acetic anhydride, 600kg of acetic acid and 1200kg of toluene. The acetic acid is obtained as a by-product of the acetylation step of the process. An well-agitated reactor using a diffusion plate will introduce Ketene gas, to be passed through the recycled filtrate at a temperature between 15-25 degrees Celsius. When a weight increase of 420. 5kg of the Ketene gas is observed, the mother liquor contains 180-270kg of UN-precipitated acetyl acid and 1532kg of acetic anhydride in 1200kg of toluene. The Mother liquor is recycled and 1382kg of Salicylic acid is added to continue the reaction cycle. BC- the first and most influential physician wrote about the bitter powder extracted from the willow bark that could ease aches and pains and reduce fever. 1700- The scientist Reverend Edmund Stone found out that the part of the willow tree bark that was bitter and good for fever and pain is a chemical known as Salicin. This converts into another chemical called Salicylic acid when eaten. 1829- A pharmacist known as Leroux showed that Salicin is the active willow ingredient and for the first time an Italian chemist Piria used Salicylic acid to treat pain and swelling in diseases such as Arthritis and to treat fever in illnesses like Influenza. The problem was that these chemicals was causing the users upset stomachs. Some people had bleeding in their digestive tracts from high doses needed to control swelling and pain. It was thought that the reason of stomach upsets were because of the acid in the chemical, therefore the compound Salicylic acid went through a couple of chemical reactions that covered up one of the acidic parts with an ACETYL group, converting it to ACETYLSALICYLIC ACID (ASA). It was found that ASA reduced fever and relieve of pain and swelling but also it was much better for the stomach and worked better than Salicylic Acid. 1899- ASA was given the name ASPIRIN- that comes from the plant relative of a rose that makes SALICYLIC ACID (several plants makes this compound not just willow). Â  How drugs such as aspirin work Prostaglandin is a chemical that is released to make the nerve ending register an even stronger pain to the brain. It is made in working cells of the damaged tissues by using an enzyme called CYCLOOXYGENASE 2 (COX-2). Prostaglandin makes you feel the pain of the damaged area and causes it to swell up (inflammation), to bathe the tissues in fluid from the blood so that it will protect it and help it heal. Pain serves the purpose here to remind you that the damaged area cannot be used, as it is not healed. However sometimes we endure pain when there is no real reason to. For example Period Pains and Arthritis. It can make people feel really uncomfortable and arthritis can damage joints permanently. ASPIRIN works by locking itself to the enzyme that makes the chemical Prostaglandin. The enzyme C0X-2 that is found in normal tissues but mostly in tissues that have been damaged in some way, can no longer convert floating chemicals into Prostaglandin because they are unable to move with the aspirin lock on. Aspirin does not treat the cause of the pain; it just lowers the pain signals getting through your nerves to the brain. How effective aspirin is New researches suggest that an aspirin a day is a preventive measure against Heart Attacks. However the effectiveness of aspirin has differential effects depending on genetics.

Essay about The Road to the American Civil War - 1347 Words

The majority of speculations regarding the causes of the American Civil War are in some relation to slavery. While slavery was a factor in the disagreements that led to the Civil War, it was not the solitary or primary cause. There were three other, larger causes that contributed more directly to the beginning of the secession of the southern states and, eventually, the start of the war. Those three causes included economic and social divergence amongst the North and South, state versus national rights, and the Supreme Court’s ruling in the Dred Scott case. Each of these causes involved slavery in some way, but were not exclusively based upon slavery. The North and South were forming completely different economies, and therefore†¦show more content†¦The South had some urbanization, in cities such as Atlanta, Georgia and Columbia, South Carolina. These cities served as transportation hubs, mainly for the transporting of goods, specifically cotton. The South would trans port cotton to the northern industries to produce finished goods from the cotton. The transportation hubs and railroad systems existed more often in the North than in the South, because there were more large cities. Due to the North and South existing with completely diverse demographics, geographies, and economies they were unable to understand the needs of one another in reference to the continuation of their thriving economies. With the North becoming more urbanized and based on industry, its power was also growing. The bulk of politics, transportation, and industry all existed in the North. The South began forming an opinion that new political decisions were being made in the North’s favor, and threatening the expansion of slavery, which threatened the expansion of their economic growth. This began with the formation of Henry Clay’s Missouri Compromise of 1820, which let Missouri come into the Union as a slave state, and Maine would come in as a free state. 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