Effective vs. Ineffective Language Essay Example | Topics and Well Written Essays - 250 words - 1

Effective vs. Ineffective Language - Essay Example Ineffective language happens as a result of failure of attainment of certain goals set, as a result of stress and pressure in the process of work. Such stress leads to use of a communal language that develops in the setting where there is stress. Language and euphemism develop in form of group terms from group thinking such as ‘credibility and cultivating a ‘you attitude.’ In organizations, the jargon is useful for developing motivation among workers to work toward a certain cause and goal. It is an effective language in creating motivation among workers. Such jargons are useful for stirring self-drive in places of work. They are especially effective where users and learners of language are involved. Creating a ‘you attitude’ may serve in more than one field as means of development. Use of language like this and jargon among a group of people creates a communication platform for the workers and new users of a language to develop unity and understanding among themselves. The jargon develops into other modes of language that acts like the first language for the group involved. It provides authenticity and as sense of belonging and extends further to the use of aid in achieving communication through language different from the norm but which is understood among peers, colleagues or other groups that need to communicate amongst

Posters of the Second World War An Analysis

Posters of the Second World War An Analysis What was the impact of the posters from the Second World War?Why are they still popular? Introduction: For my dissertation I have chosen to look at the posters from the Second World War. The idea to look at these posters came from my own interest in the war, the 1940s and the propaganda posters. I wanted to look further into them; why they were created, and what for?, did the posters do anything to help people during the war? And how/ why they still remain so popular today? After researching the era, researching the posters and visiting various places I decided I wanted to look at how people acted upon these posters and how they all helped with the war effort. Life changed massively from the moment it was announced Britain was at war Everything was rationed from food to petrol, gas masks were issued, children had the option to be evacuated, men were going to war and women were working. Even though there was so much going on and your normal day to day life could change at any moment the government wanted to try and get people to work and live as normally as they possibly could. The government was issuing hundreds of posters; urging people to work for victory, reminding you to wear your gas masks, talk less, turn off the lights, walk to work, plant vegetable, health posters and so many more. I wanted to look into these posters and how they helped people throughout the war and if they did help at all. There was so many posters produced, some of the posters I wanted to look at are: Keep Calm and Carry on, Dig for Victory, Make do and mend, Dont do it, mother leave the children where they are and a few more. One of the many things of the war I have always found interesting and is something I wanted to look at within this dissertation is family life Evacuation and the make do and mend. Evacuation of the war was one of the greatest movement and decisions made by the government during the war over 3,500,000 children were taken away from their homes to avoid the bombings and move out to the country and smaller areas less likely to be attacked. The first big attack on London lasted up to 76 days and nights, thousands were killed, injured and made homeless: The homeless resulted to camping nearby and thousands of people slept on the platforms of the underground stations each night. The main places were evacuation was taking place were on large cities such as London, Manchester, Liverpool, Portsmouth, Southampton, Bristol and Glasgow. Even though evacuation was an optional thing to do the government tried to push it as much as possible so children were safe and out of the way. After a while n othing was happening and parents felt that their children had been sent away for no reason, the government produced hundred more posters to try and explain that this wasnt the case. I wanted to look more into these posters to find out when these posters started to go out to the public, what the reaction was and if they did work like they hoped. Chapter One: The Second World War Why were these posters produced? Did they do anything? Chapter Two: Keep Calm and Carry On Why has this poster become so iconic? Chapter Three: Imitations and Popularity Why are these posters still so popular? How have they been reused? Chapter One:The Second World War Why were the posters produced? Did they do anything? Before the war officially broke out the government tried everything to prepare Britain for what was to come. Posters were one of the main ways to get the message across to the general public, which means these posters would have been seen everywhere. So many posters were produced during the second world war informing the general public on everything; Appeals and instructions, Immunization against Diphtheria, preventing the spread of a common cold, women covering their hair in factories, Dig for Victory and so many more. The earliest poster produced by the Ministry of Information was your courage, Your Cheerfulness, Your resolution will bring us victory which was one of three in a series of posters produced in 1939. Evacuation:Evacuation began on 1st September 1939 inn major cities such as London, Manchester, Belfast and Liverpool. The government wanted the children out of the way before the attacks started, it was expected that the war would open with a massive aerial attack on British cities. The government designed came up with the idea to protect people in Britain but particularly children by moving them to areas thought to be less at risk. School children (827,000) and their teachers, Mothers with children under 5 (524,000), Pregnant women (12,000) were evacuated. There were many posters produced by the government for the idea of evacuation; Mothers send them out of London -even though evacuation was voluntary the government tried to urge women to register their children for evacuation to protect them from what was to come and they would be safer from the bombs in the country. Evacuees returned home January 1940; The period known as the Phoney War, no real danger was happening and a lot of people felt cheated that they had sent their children away for no visible reason. Efforts were made to persuade parents that it was their patriotic duty to send their children back to the country. With children returning home the Ministry of Health produced more posters warning mothers not to be tempted by Hitler and the non- events that have happened; DONT do it mother LEAVE THE CHILDREN WHERE THEY ARE. Many of the posters produced at this time for evacuation were talking to the mothers trying to persuade them to leave the children where they are where they are the safest. This particular poster is one of the most recognised; it portrays a mother and her two children with a ghostly figure of Hitler saying take them back! Take them back! Take them back!. The design of the poster is very simple with a hand drawn black and white image with the text being the main focus h ighlighted in red. The one downside to the evacuation at first was not everyone was keen to take the children in but for some they did go and live with family or family friends. It might be you! Caring for evacuees is a national service These posters were produced to remind people of their duty to help with the war efforts by taking in the homeless from the cities. Dig for VictoryRationing began 8th January 1940 just months after the Second World War broke out. The Dig for Victory campaign was set up during the Second World War by the Ministry of Agriculture; the idea was to encourage men and women to grow their own food to help with the war effort. Many open spaces were turned into allotments; a garden, public parks even the lawn outside the tower of London was turned into a vegetable patch. Before rationing and the Dig for Victory campaign was introduced Britain was reliant on the cheap imports of food from overseas; main suppliers were from Canada and America. Everyone had to help with the effort: Men, women and children everyone could do their bit whether it was looking after an allotment or growing vegetables in the garden or window box. The Dig for Victory campaign seemed to be successful with getting the help with the war effort message across. It became a part of childrens everyday school routine all children helped digging by going to the parks in the afternoon to dig up carrots, cabbages and potatoes. By 1943 there were over 1.4million allotments producing over a million tons of vegetables that year. Two very iconic posters are Your own vegetables all the year round if you dig for victory now and Dig for Victory they both have two very different designs with the same messages. Out of the both of these posters the most iconic and recognisable is the poster of the young boy with his back to you while his walks off to contribute to the war effort. This has such a basic design and colour pallet but with a clear Dig for Victory message. The other however is similar to the evacuation poster, the main focus of the poster is not meant to be the imagery but it is the text. This has been highlighted in yellow and black along with a large font to grab your attention. There were many posters produced for the Dig for Victory campaign and others by the Ministry of Health. The Ministry created cartoon characters such as Potato Pete and Doctor Carrot, the idea was to show how good these vegetables were for you. Slogans read: Im a protective food- says Potato Pete, Call me often and youll keep well Doctor Carrot. These adverts/ posters proved successful and were popular amongst children as they both had songs to go alongside them as well as recipe books for the parents. Dig for Victory, grow your own vegetables now, your own vegetables all the year roundif you DIG FOR VICTORY NOW! a lot of posters produced showed more women working than they did men at this time; As a lot of the men went to war it was the womens job to fill in and do the jobs the men had left behind. Rather than showing young women in elegant dresses, magazines and posters showed happy young women with pitch forks helping the war effort. Without these posters persuading and showing the women doing mens jobs (factory, farming, Mechanics) the jobs for women wouldnt have progressed like they have done and they would still be expected to be housewives. The Dig for Victory campaign proved to be one of the most successful from the Second World War. The idea of growing your own food didnt just stop straight after the war had ended, it continued for many years after and people are still doing it now. Both of these posters proved to be a huge success during the Second World War, the general public acted upon them and chose to do the right thing to help with the war effort. The posters changed the way the UK lived and worked for many years after and they still have an effect on what we do today. Chapter Two: Keep Calm and Carry On -Why has this poster become so iconic? The message Keep Calm and Carry on nowadays has been completely taken out of context and is seen everywhere; posters advertising events (pub quiz), used online (Memes Keep calm and go to Hogwarts), Companies are using the slogan and has appeared on Homeware and so much more. But why do people still love this message?The poster was originally produced by the Ministry of Information in 1939 after the outbreak of the Second World War. The Ministry of Information designed three morale boosting posters which were to be displayed across Britain. They read; Your Courage, Your Cheerfulness, Your Resolution will Bring us Victory, Freedom is in Peril, Defend it with all your might and Keep Calm and Carry On. Two out of the three posters were seen on public transport, in shop windows, on notice boards and many other places across Britain. The Ministry of Information produced hundreds of posters during the war to spread important messages. During the war the main way of reaching people was thro ugh billboards, public transport and in papers during the 1940s people werent trying to compete with television, internet and social media. The Keep Calm and Carry on poster was rediscovered in 2000 at Barter Books in Alnwick, Northumberland. The owner of the shop found the poster folded up at the bottom of a box of books. After the poster was found it was framed and hung in the shop It attracted so much interest that the owners began to produce and sell copies. Later this turned into more products and then soon after other people copied the keep calm and products with this slogan were seen everywhere. The plan for the Keep Calm poster was to only issue it on the invasion of Germany This didnt happen which meant the poster was never officially seen by the public. Over two-and-a-half-million copies were printed to be distributed across Britain. The Keep Calm poster is one of the many few during the war that wasnt telling people to go out and fight, dig for victory, made do and mend as well as careless talk. This particular poster was just a simple message telling people to remain calm during the situation and not to panic. The poster is now seen not only as a distillation of a crucial moment in Britishness, but also as an inspiring message from the past to the presentin a time of crisis Susannah Walker-Design Historian I agree with the previous statement, people admire many posters from the second world war for many reasons; some of the posters are still relatable, bring back memories and have stories to tell. However Keep Calm and Carry On it is one of the most well-known posters from the war which was never used. People nowadays still like this poster as it is a nostalgic memory from the war but when the series of posters were released people didnt like them; the people who saw the posters said they were patronising and divisive. The entire campaign produced by the Ministry of Information was completely scrapped just after four weeks. The posters they had printed were stored away and kept until April 1940, The majority of the posters were pulped as part of the governments idea to recycle paper so only a few copies survived. With its rising popularity over the years it has become one of the iconic images of the 21st century, not just from the original design but from everything that has come from this one image. The popularity of the poster spreads further than just Britain; it has been spotted in seaside town gift shops in America. When it reaches places like this the poster ends up losing its Britishness and becomes a very stereotypical thing about the country. Why is it hated? People like the original postern for how British it is as well as it having a sense of nostalgia and memories of the war as well as the message behind the poster; it is also hated by what has become of it and how it is constantly adapted online. Online was the first place where the poster began to go away from the original message; Keep Calm and Call Batman, Keep Calm and Hakuna Matata, Keep Calm and Eat a cupcake and so many more. Soon after the adapted versions were seen on mugs, notebooks, being used to advertise products People wanted to see the end of the poster after this. But why do we as a country still love and cling onto this poster?Realistically with the Keep calm and carry on poster people want to hate it (some do) and wish it would die of death like many other trends over the years, many people however secretly do like it.In the UK we are drawn instantly to anything baring the flag, Royal Family, Tea and all the normal stereotypical British things. It is the same with this poster; people are drawn to the Britishness of it and the calming yet nostalgic message. It is one of the many posters from the Second World War that at times can still relate to any issue going on in our country. It still spreads the same message to us now as it should have done then. Comparing the current government to the government then it would be difficult for them now to come up with a poster that has the same appeal to it powerful and simplicity might not be enough these days. Posters produced by the government now attempt to convince the public of a danger and get them to modify their behaviour; Keep Calm and Carry On tells you to think another way and continue acting as you have always acted. There would be attempts to create new and improved posters or even try and develop ones that already exist. If anything were ever happen to the United Kingdom like it did during the war, people would go back and dig out the old posters. They worked before, they will work again. Chapter Three:Imitations and Popularity Why are these posters still so popular? How have they been re-used? Many of the posters from the Second World War are always being imitated; if its to advertise new products of to promote a local event. These posters are always coming back around just designed in a different way; one of the easiest posters to re-produce is Keep Calm and Carry On. Keep Calm and Carry OnIn 2012 McFly promoted their tour called The Keep Calm and Play Louder tour the design of the poster was kept the same with the red background and the grown of King George but with the bands logo added to the image. Another company to use the Keep Calm was Nectar in 2010 to promote the loyalty card; Keep Calm and Carry One. The campaign was featured in over nine newspapers including; The Sun, Daily Mirror, Metro, The Times and The Telegraph. The design of the poster was kept similar to the original with the layout and text The background was the Nectar purple and in place of the crown was the nectar card. In 2012, Shepheard Neame released limited edition bottles; Keep Calm and Celebrate. The idea behind the bottle was to evoke on the country-wide pride during the summer of national celebration; London Olympics, Diamond Jubilee and Euro 2012 as well as to commemorate the Battle of Britain The bottles were only issued at large events. The design of the Keep Cal m was kept simple background changed to navy and in place of the crown was a spitfire. Ministry of FoodIt isnt just the posters that are always being imitated and reproduced, its even sayings and old campaigns. Back in 2008, Jamie Oliver released a book and TV series called Ministry of Food This has been taken from the food rationing system from the war.What was the Ministry of Food during world war two?During the Second World War the Ministry of food was more known as Minister of food and Minister of food control. The main task for the Minister of Food during the war was to oversee the rationing in the UK; originally the idea of rationing began as an experiment and for the ministry it worked surprisingly well. Rationing officially began in early January 1940 and was a major success of the Second World War. With the food supplies cut short because of Germanys actions and the needs of the services, rationing was an essential and by 1942 most foods were rationed. One issue the Minister of food had with the rationing was children they wanted to make sure that Britain wa s providing 650,000 children with free school meals and to guarantee them an adequate nutrition (for everyone not just the children). The minister of food released recipes to help people through the war to create simple and easy meals with the little food they had. Jamie Oliver TV program and book idea was an aim to try and recreate the success of the ministry of food and try and encourage healthy eating. From this program he set up four Ministry of food centres which were all offering the food he had been producing on the show. The title of the show is a play on the Ministry of food and Minister of food. Make do and mend Make do and mend isnt a poster that people are taking off but it is still something a lot of people do still follow. You could argue that we now live in a throw-away society when our clothes get stained or the seams of trousers show any wear we simply dispose of the item or rebuy them as clothing has become cheaper. There are however a lot of younger people who prefer to upcycle clothes or even make their own from rummaging through a charity shop. The Make do and mend campaign started when clothes rationing was introduced during the Second World War. The Ministry of information produced a pamphlet encouraging people to do whatever they could to extend the life of their clothes (a leaflet which is still reproduced and sold in some museum gift shops). The campaign played an important part in the daily life during world war two. The shortage of clothes was down to sinking ships coming into England as well as the clothing manufacturers were commissioned to manufacture uniforms as a priority. As clothing was now a shortage, in 1941 clothes rationing was introduced: people were given 66 coupons a year (which was later reduced) a womans blouse was 12 coupons, 11 coupons for a dress, 2 for socks/stockings, 8 for a mens shirt or trousers, 5 for womens shoes and 7 for men and extra coupons were given to children. As everything was being rationed clothes had to last a lot longer so people began to make new clothes from the old and from a ny other household linen. Nothing was thrown away, especially if it could be made into something else. A pamphlet was part of the campaign and was intended to provide housewives with useful tips and ideas on how to reuse old clothing. Readers were advised to create: decorative patches to cover holes on warn garments, unpick old jumpers to re-knit alternatives and turn mens clothing into womens. One of the hardest things for parents with the clothing ration was struggling to clothe their growing children Clothing Exchanges were set up by the womens voluntary service to help meet these parents needs. Parents could take clothes their children had outgrown and swap it for new clothes. Like I mentioned previously a lot of people do enjoy Sewing, knitting, crochet and making their own clothes and it is still a popular thing to do. I think that the make do a mend campaign is still applies now and people do still follow the ideas and information inside the pamphlet like people did then. Within this dissertation the one poster I wanted to look at more so than the others was Keep Calm and Carry On. It is the most overused poster from the 1940s and has slowly become one people cant stand. The meaning behind the poster has been lost and taken out of context, from the way it is used online through memes to the way companies are using it to advertise products. I have discovered that a lot of the hate towards the poster has come from online and how it became adapted and stepped away from the original message; Keep calm and go to Hogwarts, Keep calm and call the doctor, Keep calm and let it go and so many more. The adapted versions are seen everywhere. In conclusion to this I have found out that the posters from the Second World War will always have a strong impact on Britain There was throughout the war and they have had a similar impact for many years after. These posters will always remain popular; we are drawn to them regardless if it is the original posters or somethi ng that has been created from the original. Posters such as Dig for victory is still a poster that is followed today with people still growing their own vegetables, Make do and mend is another poster which is still followed with people still making their own garments from scraps and new fabrics. Bibliography: Waller, Maureen (2012) A family in wartime: How the Second World War shaped the live of a generation: ConwayPages: 10,16,20,47,72,121,125 Williams, Brenda (2006) The World at War World War II: The Homefront: Oxford Ross, Stewart (2007) At home in World War Two: Evacuation : Evans Brothers ltd First News and The Silverline (2016) Voices from the Second World War: Witnesses share their stories with the children of today: London Walker Books and Subsidiaries The Story of Keep Calm and Carry on (Uploaded: Barter Books 28th February 2012)https://www.youtube.com/watch?v=FrHkKXFRbCI Dig for Victory (Uploaded: 20th March 2009) Imperial War Museum Collectionshttps://www.youtube.com/watch?v=H_Gs7Vik75k Poison gas and gas masks : Join me in the 1900 [online] www.1900s.org.uk/1940s-gas.htm Evacuation in World War Two (2013) [online] www.primaryhomeworkhelp.co.uk/war/evacuation1.html The Evacuated Children of the Second World War : Imperial War Museum [online]www.IWM.org.uk/history/the-evacuated-children-of-the-second-world-war Evacuation How it affected ordinary lives : Home sweet Home front (July 2011) [online]www.homesweethomefront.co.uk/web_pages/hshf_evacuees_pg.htm Dig for Victory: Home sweet Home front (July 2011) [online]www.homesweethomefront.co.uk/web_pages/hshf_dig_for_victory_pg.htm How Dig for Victory campaign helped win the war The Telegraph (April 2013) [online]www.telegraph.co.uk/news/earth/environment/9996180/how-dig-for-victory-campaign-helped-win-the-war.html How to Dig for Victory : The Big World [online] www.thebigworld.co.uk/howtodigforvictory.htm#.V87xNgrLiu Keep Calm and Carry On [online] http://en.m.wikipedia.org/wiki/keep_calm_and_carry_on Keep Calm and Carry on the sinister message behind the slogan that seduced the nationThe Guardian (January 2016) [online]https://www.theguardian.com/books/2016/jan/08/keep-calm-and-carry-on-posters-austerity-abiquity-sinister-implications Keep Calm and Carry On (2011) [online] www.knowyourmeme.com/memes/keep-calm-and-carry-on I am the keep calm and carry on man The Independent (April 2009) [online]www.independent.co.uk/news/people/profiles/first-person-I-am-the-keep-calm-and-carry-on-man Keep calm and carry on -History [online] www.keepcalmandcarryon.com/history/ How long can the Keep calm trend carry on? The Independent (May 2015) [online]www.independent.co.uk/news/uk/this-britain/how-long-can-the-keep-calm-trend-carry-on-8627557.html The Greatest motivational poster ever? BBC News (February 2009) [online] news.bbc.co.uk/1/hi/magazine/7869458.stm Nectar ad plays on wartime poster for new era of post-budget austerity -The Guardian (June 2010) [online] http://www.theguardian.com/media/2010/Jun/22-nectar-loyalty-card-advert-keep-calm Make do and mend Victory living (2010) [online] www.victoryliving.co.uk/make-do-and-mend Make do and mend -1943 -British Library [online] www.bl.uk/learning/timeline/item106365.html 8 facts about clothes rationing in Britain during the Second World War -Imperial War Museum [online] www.iwm.org.uk/history/8-facts-about-clothes-rationing-in-britain-during-the-second-world-war Minister of food Wikipedia http://en.wikipedia.org/wiki/minister_of_food_(united_kingdom) Shepherd Neame produces limited edition spitfire bottle for 2012 events Big Hospitality (march 2012) [online]www.bighospitality.co.uk/new_products/shepherd_neame_produces_limited_edition_spitfire_bottle_for_2012_events

Race and Intelligence - Investigating the Low IQ of Racists :: Sociology Racism Prejudice Essays

Investigating the Low IQ of Racists       Studies going back over 50 years have repeatedly arrived at the same conclusion -- racists have lower IQs than non-racists. The average intelligence quotient (IQ) of all members of the human race is 100 on the Stanford-Binet scale. The average IQ of racists is up to 4 IQ points less than this (Montagu 1952 & 1988, Allport 1946, Frenkel-Brunswick and Sanford 1945). The reasons this is true are not entirely clear. Does racism attract the unintelligent or do the unintelligent default into racist mentalities? An exploration of this phenomenon can be most informative.    Since the average IQ of a racist is less than the average, racists have two-digit IQs, while normal people have three-digit IQs, on the average. This applies to Nazi skinheads, American Nazis, the oxymoronic Aryan supremacists, Christian Identity fanatics, anti-semites, non-denominational bigots, and other such social rejects. The statistical analysis is based on a standard deviation of 10, and is normalized for matching populations.    Many studies have explored the psychology of racism and the familial and social backgrounds of racists. Some interesting generalities can be extracted from these studies, including the fact that racists tend to be conservatives, conformists, Republicans, and hypochondriacs. The high incidence of conservatism, conformism, and Republicanism are all related phenomena. That is, one would expect a conformist to be a conservative, and a conservative to be a Republican, and a Republican to be a conformist, etc. But, why would they tend to be hypochondriacs? Perhaps they blame their body parts for imaginary illnesses in the same way they blame parts of society for imaginary social illnesses.    The arguments of racism have been demonstrated time and again to be illogical and irrational. For example, racists claim that so-called white people are "superior" to so-called black people. Ignoring for the moment the inability of science to draw a sharp line between those who are subjectively considered to be white and those who are subjectively considered to be black, lets consider the claims of superiority by racist supremacists.    As we look around us in America today we see a country full of diversity in which American blacks and other citizens of non-European descent excel in all the arts and sciences, in all aspects of business, in all political arenas, and in all athletics and other social activities. From our

Effect Of Annealing Time And Temperature Environmental Sciences Essay

introduced to depict the experimental semi log I-V curve informations from the thermionic emanation theory utilizing ideality equation the ideality factor N of the rectifying tube was calculated from the incline of the additive part of the semi log I-V curve. Using equation 3.22, the nothing biased barrier tallness was determined from the impregnation current that was obtained from the intercept of the excess plotted additive part with current axis at V=0. In Fig. 4.1 the logarithmic dependance of I with forward biased electromotive force is seen to widen over more than five order of magnitude leting ‘n ‘ to be easy deduced from the gradient. Any interfacial oxides layer ensuing from exposure of the semiconducting material surface to the ambiance between growing and metallization would hold the consequence of doing ideality factor a electromotive force dependent parametric quantity instead than a changeless ( Rhoderick and Williams, 1988 ) . The one-dimensionality observed in Fig. 4.1 clearly show that any bing interfacial bed must be undistinguished thickness and value for ‘n ‘ which was deduced from Fig. 4.1 being close to 1 indicated the cross barrier conveyance procedure in preponderantly via thermionic emanation. Harmonizing to Pattabi et Al. ( 2007 ) an ideality factor greater than integrity is by and large attributed to the presence of a bias dependent Schottky barrier tallness. Image forces, burrowing, g eneration-recombination, interface drosss and interfacial oxide bed are possible factors which could take to a higher ideality factor. The ideality factor represents a direct step of interface uniformity. The values for both Ns and are listed in Table 4.1 for junctions at assorted times after formation ( while at room temperature ) and in Table 4.2 for a sample which was subjected to a series of tempering interventions in vacuity at 150C0. In order to analyze the stableness of Au-CdTe contacts, the electrical features of a figure of samples were investigated as map of clip after fiction. Table 4.1 gives the information for one of these samples which was studied over a period of four hebdomads. Immediately after fiction it can be seen in Table 4.1 that the barrier height measured 0.88ev. After one hebdomad there was important decrease in the barrier height to 0.80ev as determined from I-V measurings and after two hebdomads at that place was a farther decrease in the barrier height to 0.68eV. At this phase in order to look into the stableness of the measuring system, these measurings were repeated on the following twenty-four hours and, as the Table 4.1 shows indistinguishable features were observed. This confirmed the dependability of the measuring. Subsequent measuring after three hebdomads and four hebdomads indicated a much more stable behaviour of the contact with the barrier height being mentioned in the part 0.67 – 0.68eV.As it was expected that these procedures could be speeded up by increasing the temperature, a figure of sample were studied after tempering or different lengths of clip at 150C & A ; deg ; . Typical sets of I-V consequence are presented in Table 4.2. For this sample ( 228F ) the initial barrier tallness was calculated to be 0.95eV although this is non a dependable value in the position of the initial value of the ideality factor being instead high ( at 1.02 ) . How of all time after the sample was annealed at 150C & A ; deg ; for merely ten proceedingss, there was a important betterment in the ideality factor ( to 1.1 ) and a significant decrease in the measured barrier tallness to 0.75eV. It appears from this that the consequence of a brief annealing intervention was similar to go forthing the sample for a hebdomad or two at room temperature. After the sample was annealed for a 2nd clip ( for 15 proceedingss ) there was further but smaller decrease in barrier tallne ss to 0.68eV and after a 3rd annealing period ( this clip for 20 proceedingss ) there was an even smaller decrease to 0.65eV. This tendency in behaviour due to tempering, with an initial rapid autumn in the barrier height being followed by lower alterations and greater stableness is clearly similar to that observed for sample 228A which remained at room temperature for four hebdomads. It was noted above that this behaviour must be due to chemical reaction or diffusion procedures in the part of the M/S interface. In order to supply farther information on the nature of the procedures involved, a 2nd Au contact was formed to try 228F after it had been annealed ( with its first contact in topographic point ) for a sum of 45 proceedingss are antecedently described. The features of this 2nd contact are included in Table 4.2. It is clear that the initial barrier height 0.66eV for this new contact is closer to the concluding ( station tempering ) value for the original contact instead so to the much higher initial ( brittle ) value. This suggests that the procedures which influence the barrier tallness may be due to some out-diffusion from the inside of the semiconducting material to its surface. Clearly they are non dependent on the presence of the gold bed although some interaction between the Au contact and the implicit in semiconducting material is expected to happen ( Dharmadasa et al. , 1989 ; Van Meirhaeghe et al. , 1991 ) .The consequence of farther tempering for up to 70 proceedingss is rec orded in Table 4.2. Merely little alterations in ideality factor and barrier tallness were observed, bespeaking rather stable behaviour for the new junction similar to that of the original junction after tempering. Although Au is a p-type dopant in CdTe, the informations in table 4.1 and 4.2 indicates that the alterations in interface features are non dependent on the presence of Au during the procedure of tempering. An alternate account is that there is an outward diffusion of Cd ( likewise taking to the coevals of acceptor provinces near-surface part ) .This reading of the consequences is entirely understanding with the decision reached by Dharmadasa et Al. ( 1994 ) on the consequence of chemical etch interventions. Those etchants which were found to go forth the surface rich in Cd tended to bring forth barrier highs greater than 0.9 electron volts while those go forthing the surface deficient in Cd produced barrier highs which were ~ 0.2eV lower, as found in the instance of the annealed samples studied in this undertaking. Therefore, it is clear that interface reaction lead to a significant alteration in the defect construction in the locality of the junction but farther work will be necessa ry to find the exact construction of the defects provinces which might be responsible for Fermi degree traping before and after the reaction and the associated decrease in barrier tallness. 5.2 Effect of ion plating technique In order to compare the consequence for Au contacts formed by ion-assisted manner with contacts produced by the usual vaporization process, a figure of samples were given two contacts ( one of each type ) . Fig. 4.2 gives the features for the normal Au contact and Fig. 4.3 gives the features for the ion-plated contact with 15 unsweet ion-etching clip. As expected, the I-V features in Fig. 4.2 are with ideality factor ‘n ‘ 1.2 and barrier tallness ( ) 0.90eV. As expected, the features in Fig. 4.2 are really similar to those shown in Fig. 4.1. However, for the ion-plated contact with 15 unsweet ion-etching clip there is a drastic alteration in both ideality factor ‘n ‘ and the barrier tallness ( ) was found to be 2.2 and 0.69 electron volts severally from I-V features shown in Fig. 4.3. This consequence suggests that a significant denseness of defects has been created below the Au contacts as a consequence of ion barrage of the surface during the plating procedu re. The presence of defects in the depletion part, moving as recombination centres, leads to an extra forward prejudice current constituent with an ideality factor of about 2 ( Shochley and Read, 1952 ) . However, the alteration in the behavior for the ion plated contact with 20 unsweet ion-etching clip is even more drastic than observed in Fig. 4.3. There is a greater addition in both frontward and change by reversal bias current with a really low barrier tallness of the order of 0.45 electron volt and N was determined to be 4.1 observed from features shown in Fig. 4.3. Fig. 4.4 shows the battier highs as a map of ideality factors for these ion plated Schottky rectifying tubes. As can be seen from Fig. 4.4, there is a additive relationship between the barrier tallness and ideality factor, with the barrier height going smaller as the ideality factor additions. Change in ideality factor indicates that current conveyance mechanisms other than thermionic emanation are present. As this value of N is significantly greater than 2, as would be expected for a bearer recombination mechanism, as discussed earlier, it seems likely that bearer tunneling may besides be playing a function ( Popovic, 1978 ) . These consequences indicate that the possible consequence of plasma-induced surface defects is that they contribute to the conduction of the contact by moving as fast recombination centres ( Ponon, 1985 ) and in add-on to burrowing procedure suggest that this might be a utile manner of farming low opposition ( ohmic ) junction utilizing a lower work map metal. 5.3 Effect of Doping The ideal I-V features of a Schottky rectifying tube exhibits exponential prejudice dependance as in equation 3.21 can be reduced to For V & A ; gt ; 3kT/q The magnitude of this impregnation current is governed by the effectual barrier height i.e. the difference between the conductivity set lower limit ( CBM ) at the surface of Au/n-CdTe and the Fermi degree of the metal ( Au ) . The value of the barrier tallness can be calculated from the measured impregnation current utilizing equation 3.22 Deviation from this ideal behavior can be seen on the exponentially determined I-V features for normal, low and to a great extent doped InSb substrate in Figures 4.6, 4.7 and 4.8 severally where important inclines are observed for the current under contrary prejudice. Those divergences are attributed to image force take downing ( IFL ) , recombination phenomena due to the presence of deep traps and the being of high electric field ( Martin, 1981 ) . The ideality factors ‘n ‘ and effectual barrier tallness were calculated from I-V features utilizing equation 3.23 and 3.24. The term effectual reflects the fact that the barrier tallness deduced from I-V measurings is lower than the value that should be obtained under inactive status i.e. without bearer injection, and includes the consequence of the image force take downing. Fig 4.11 shows a comparative position of I-V features for these three doped samples. After rating of I-V features, the values of the effectual barrier tallness and ideality factors for three wafers are shown in Table 4.4. A graph between barrier highs and ideality factors of three doped Au/n-CdTe Schottky rectifying tube is shown in Fig 4.9. A additive relationship between ideality factor and barrier tallness can be seen in Fig. 4.9 which is comparable to Fig.4.4. It has been demonstrated theoretically and by experimentation that the additive relationship between and ‘n ‘ can be attribute d to the sidelong inhomogeneties of the barrier tallness in Schottky rectifying tubes ( Koutsouras et al. , 2005 ) . The presence of traps besides modifies the incline of the forward current and at the same clip the value of the ideality factor, which is higher than integrity for both samples ( low and high doped sample ) . With increasing dopant concentration, the breadth of the depletion part W i.e. given by relation 3.11 i.e. at a given prejudice decreases taking to higher electric Fieldss at the interface. Low barrier or effectual barrier height instead than observed for the to a great extent doped sample ( 549E ) substrate. That is the ground for the higher swill under contrary prejudice for doped samples ( 549F, 549F ) . However, the enhanced recombination rate due to the presence of deep trap degrees besides contributes coevals and recombination consequence and can non be excluded. With heavier doping, increasing figure of new donor-type energy degrees are created underneath the conductivity set border. Under these fortunes, the givers are so near together that the giver degrees are no longer discrete and non-interacting energy degrees. These are instead debauched unifying together to make an dross bond, and doing band-gap narrowing ( BNG ) of the conductivity set. Obviously, the BNG is the highest near M/S interface, and the lowest in the majority. The effectual M/S barrier tallness is therefore reduced, as shown schematically in Fig 5.1. The crisp tip of the conductivity set border in contact with the metal is peculiarly lowered, and the new barrier tallness becomes, where is the Figure 5.1: Conventional diagram demoing the decrease of M/S barrier tallness due to band-gap narrowing. barrier tallness without BNG, and is the barrier tallness with BGN. However, a much more opposition arises from the CdTe/InSb junction. It has been shown that there is a possible barrier at this interface, associated with a conductivity set discontinuity of ~0.31 eV ( Van Welzenis and Ridley, 1984 ) . From a elaborate analysis of I-V features for gold-contacted devices with similar dimensions to those in present survey, effectual opposition value of ~100? have been deduced for the CdTe/InSb junction part ( Sands and Scott, 1995 ) . Harmonizing to the thermionic emanation theory, the contact electric resistance at the M/S contact depends merely on the effectual M/S barrier tallness, as given by ( Sze, 1982 ) ( 5.1 ) Where S is the contact country ; q, K and T are electronic charge, Boltzman invariable and temperature severally and is the Richardson invariable ( with a value of ~ 1.2 -105 Am-2T-2 for CdTe ) . is the opposition associated with the forepart metal/CdTe junction. Assuming RC & A ; lt ; 10? so ?C & A ; lt ; 0.1?cm2 and the corresponding upper bound for effectual barrier tallness is 0.38 electron volt. This is consistency with surveies of Al contacts on cleen vacuity cleaved surfaces of CdTe which yielded barrier highs of ~ 0.1 electron volt ( Patterson et al. , 1986 ) . About all the old probe emphasized tunneling as the primary mechanism for low contact electric resistance in n-CdTe. The present survey dose non govern out the importance of burrowing in making low contact electric resistance. However, it demonstrates that, depending on how much is lower than, thermionic emanation, instead than burrowing, may so be the primary cause for low contact electric resistance even in the tunnel contacts. If the surface intervention is really good, and the metal parametric quantity ( e.g. , metal thickness, metal deposition temperature, metal work map, metal combination, etc. ) are optimal, so may be significantly lower than. This, together with BGN and IFL can so play a important function for giving thermionic emanation based low contact electric resistance. 5.4 Decisions The undermentioned decisions can be reached from the surveies on the effects of tempering clip and temperature, ion plated technique and doping in scope of 2.5-1016-1-1019 cm?3 on I-V features of the Au/n-CdTe Schottky rectifying tubes. From Comparative survey of ion plated and doped samples of Au/n-CdTe Schottky rectifying tube, a additive relationship between the effectual barrier highs and ideality factors was found which shows that barrier tallness lessenings as ideality factor additions. As a consequence conduction additions. From which it can be concluded that: When n = 1 so all conveyance of negatron is from the top of the barrier and thermionic emanation current mechanism should be dominant. When 1 & A ; lt ; n & A ; lt ; 2, so burrowing current mechanism is dominant. When n = 2, so all conveyance is due to coevals and recombination current. When N & A ; gt ; 4 so there is non simple burrowing but step degree burrowing occurred. Gold contact formed to n-CdTe by vacuity vaporization output Schottky barriers with initial barrier tallness In surplus of 0.88eV. This reduced to 0.66-0.68 electron volt in a period of clip which is dependent on temperature. This decrease is found to be accompanied by a partial compensation of the sickly givers in the semiconducting material part near to the contact, a procedure which can be attributed to a discriminatory out diffusion of Cadmium from this part to the contact surface. It has been shown that the usage of simple vapour deposition on Au on n-type CdTe epilayers gave rectifying behavior with barrier tallness 0.9eV. A drastic alteration in barrier tallness was observed by the usage of ion-assisted plasma procedure, an ion etching clip of 20 sec to Au contact. This decrease in barrier tallness is attributed to the plasma- induced surface defects that contribute to the high conduction of the contact by moving as recombination centres along with multi measure degree burrowing centres. Consequence of doping in Au/n-CdTe Schottky rectifying tube shows that if n-CdTe is to a great extent doped with important conductivity set flexing near M/S interface, burrowing is possible through metal/CdTe contact. The semiconducting material part at the interface therefore becomes really thin leting an unhampered flow of negatrons via burrowing. But existent challenge to accomplishing low resistively contact by utilizing reasonably doped semiconducting materials. Many devices do so necessitate low electric resistance contacts without the load of heavy doping ( Noor Mohammad, 2004 ) Consequence of doping on I-V features of Au/n-CdTe shows that barrier breadth ( tungsten ) decreases with the increasing doping denseness in conformity with ( Eq.3.11 ) . The chief decision to be drawn from the comparative survey of I-V features of Au/n-CdTe Schottky rectifying tube, formed by the ion-plating procedure and doping consequence, leads to a much reduced contact opposition suggest that this might be a utile manner of farming stable and low opposition ( ohmic ) junction utilizing a lower work map metal ( e.g. , Al etc. ) suitable for thin movie MBE grown devices.

Rates of Reaction Lab Investigation

Chemestry Lab Rates of Reaction (Picture from: http://sciencespot. net/Pages/kdzchem. html) The rate of reaction is how fast or slow a reaction is completed. This is important for factories and chemists all over the world. What happenes during a reaction is atoms or molecules that collide and form new molecules. You can affect this rate of reaction with: temperature of reactants or suroundings, surface area of reactants, if there is a catalyst present, but in theis lab the concentration was changed as the IV. The reaction rate is masured in change/time, in this case it was: volume of gass produced/minutes.Gas was measured in ml/minute, and this was the DV. Aim of lab was: To find the change in rate if reaction, depending on the concentration of hydrocloric acid. Hypothesis: If the concentration of hydrocloric acid is increased, the rate of reaction will increase and the volume of gass will increase. The reasoning behind the hypothesis is that when there are more molecules in the solu tion the reactants collide more often, so more product is made in a shorter periode of time. The equation was: Mg + 2HCl > MgCl2 + H2 Similar article: Measuring Reaction Rate Using Volume of Gas ProducedIndependent variable| Dependent variable| Controled variables| Value| How to control the CV| Concentration of acid| Rate of reaction| Vol of acid| 20 ml| Measure using a 50ml Measuring cylinder| 2 moles pr. L| Vol of gas| Temp of acid| Room temp. | Not controlled, only montored| 1 moles pr. L| | Amount of Mg| 5 cm or ribbon/ 0. 07g| Ruler, and weight| 0. 5 moles pr. L| | Precence of catalyst| No| Not have a catalyst| 0. 25 moles pr. L| | Type of acid| Hydrocloric| Have same type of acid| Method: 1. Gather aparatus and materials, and set up as shown in diagram below aparatus list. 2. Bucket + water 3. Measure temp, in room and water 4.Fill measuring cylinder with water 5. Rubber tube + sidearmed test tube 6. Obtain 0. 08 g using a weight, place in side-armed test tube 7. 20 ml HCl of 2 moles pr. L in measuring cylinder 8. Place measuring cylinder in bucket with water, upside down, without air leaking in to the cylind er when flipped. 9. Puor HCl into side-armed testtube. 10. Start the stopwatch 11. Close the top of the side-armed test tube by placing rubber tap 12. Weight 3 min. be accurate using the stopwatch 13. Record ml of gas produced 14. Reapeat the experiment twise pr. Concentration: 2 moles pr L, 1 mole pr. L, 0. 5 moles pr. L and 0. 25 moles pr. L Aparatus list: Sidearemd testtube – Rubber plug – Rubber tube – Bucket – Water – 2x 100ml measuring cylinder – 400ml Beaker – 40 ml in each concentration type of HCl acid, 2, 1, 0. 5 and 0. 25 M. Pr. L – 8x 0. 08g of Mg ribbon – Stopwatch Raw data table showing amount of gas created in the two trials of the experiment: Concentration in moles pr. L| Trial 1 – ml og gass produced in 3 min| Trial 2 – ml og gass produced in 3 min| 0. 25| 8| 10| 0. 50| 30| 32| 1. 00| 70| 73| 2. 00| 61| 65| First proceced data table showing average of gas made: Concentration in moles pr. L| Average of trial 1 and 2 in ml of gas produced in 3 min| 0. 25| 9| 0. 50| 31| 1. 0| 71. 5| 2. 00| 63| Proceced data table showing rate of reaction: Formula used=ml of gass produced/time (in seconds) Concentration in moles pr. L| Rate of reaction calculation in ml/sec| Rate of reaction result in ml/sec| 0. 25| 9/180| 0. 05| 0. 50| 31/180| 0. 17| 1. 00| 71. 5/180| 0. 40| 2. 00| 63/180| 0. 35| Graph showing the rate of reaction: Conclusion: As the results clearly show, the rate of reaction increases rapidly and this strongly supports my hypothesis. The amount of succesfull collisions increased, because of increased number of atoms in the product, so when the concentration was increased it rate of reaction increases.There are more collisions because of more atomes, and therefor more succesfull once. Evaluation: Random errors: * Therometer used to measure temperature * Inaccuracy of +/- 1 C * Balance weight used to measure Mg ribbon * Inaccuracy of +/- 0. 01 g * Measuring cylinders used to measure volume of acid and volume of gas * Inaccuracy of +/- 0. 5 ml * Ruler used to measure Mg ribbon * Inaccuracy of +/- 0. 1 cm Ways to prevent random errors and improve the method: – Compleet the experiment more times Systematic errors: – As you see in the graph, the fourth result was anomalus.During the 3 minutes the magnesium ribbon was â€Å"used up† in a very short period of time. The rate was so fast in the 2 moles per liter that it was over in under a minutte, but in the other concentration types it tok longer time for the reaction to compleet. Therefor we have to look away from the highest concentrations, and focus on the three lowest. This was a big weakness in the lab. – When pouring the HCl acid into the side armed test tube, some of the reaction had been compleeted before we had time to put the rubber stopper on every time. The temperature was only monitored, not controlled. Ways to reduce systematic errors and improve the lab: * Have a shorter reaction time: shorten the time form 3 min to around 1 minutte. * Use a fisle-funnle to prevent gas leaking out before the stopper is placed on the testtube. * Do the experiment in a controlled environment, like in a water bath. Sugestions to possible further investigations into this topic: You can change the IV, to one of the other factors that affect rate of reaction. Eg. Take the same concentration of HCl acid and change the temperature, or the precence of catalyst.