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28660 Uppsatser om Difference-in-Difference metod - Sida 65 av 1911

En studie av metodbyte vid sintring av hårdmetaller till mikrovågsintring samt dess ekonomiska fördelar : Självständigt arbete i teknisk fysik med materialvetenskap & Självständigt arbete i kemiteknik

The aim with this study was to investigate the effects a change of manufacturing process would have on the mechanical properties of drill bits made of a WC/Co composite used for stone cutting. The method used today is sintering, where the material is heated in a conventional sintering oven. The other method was microwave sintering, where the material is heated by radiation in the microwave region. Also an investigation of the manufacturing cost were made.The main difference between the two heating methods is that the conventional way is a rather slow process and the microwave method is very fast. The material is also heated homogeniously in the method with mirowaves, aposed to the case with the conventional sintering where the material is heated from the outside in.This makes the material harder and more wear resistent.

Does Party Politics Matter? - En hypotesprövande studie om USA:s partipolitiska position till europeiskt säkerhetssamarbete

In his recent article Professor of International Affairs Charles Kupchan claims that Party Politics has become increasingly important for American Foreign Policy since the end of the Cold War. This assertion makes it valuable to assess how the substance of the Foreign Policy differs between the two American parties in various cases and if this difference is characterized by consistency or by change. In this thesis I examine these Party positions in relation to the European Security Policy.In order to examine this I compare the positions of the Democratic and Republican Parties? policy concerning both the European Defence Community (EDC) and the European Security and Defence Policy (ESDP). The purpose of this thesis is to examine the hypothesis that the Democratic Party to a higher extent than the Republican Party is more concerned to maintain good relations to Europe respectively EU.The results show that there are small indications that my hypothesis concerning the two parties is valid.

Ska ekonomin få styra miljön? : En studie om public-private partnerships

This thesis aims at investigating the two municipality?s Gislaved and Ljungby. Where the aim is to see if there is any connections, between the type and the degree of public-private partnerships, and the municipalities obtained environment performance. In this essay the starting point is that the environmental performance in the chosen municipalities is good.Interviews among local politicians and representatives for the municipalities plastic industries, has functioned as a way to test the hypothesis. Gislaved and Ljungby have thereafter been compared, in order to see if there is any similarity in the sort and the degree of public-private partnerships, and how that will affect the environmental performance. The overall questions in this essay are:How can the cooperation among the chosen municipalities and the      local business life be described? What kind of Public-private partnership      exists in the selected municipalities?Is there any difference between the municipalities, referring to      the degree of cooperation between the municipalities and the local      business life? Does the degree of cooperation affect the progress on the environmental      performance? The end result shows that the local business life doesn?t have any impact on the environmental performance.

Läs- och skrivinlärning i förskoleklass : Läs- och skrivinlärning i dagsläget och utveckling under tiden 1994-2012

AbstractThe purpose of this survey is to examine how educators work with reading- and writing-skills in preschool with six year old children. I want to examine if the new curriculum, Lgr11, has affected the school teachers in their teaching of reading- and writing and if their work has changed through the years. Using a qualitative study, five preschool-teachers, working in preschool for several years, were interviewed to be heard of their thoughts about this topic. The survey shows that preschool-teachers are more familiar with the curriculum of today, in relation to previous curriculums. Much because of that the new one is more addressed to preschool compared with earlier curriculums but also that the teachers in an easier way can see the pupils? way to knowledge.

Trängselskatt : En studie om invånares attityder till trängselskatten i Stockholm

The subject of this paper is the congestion tax in Stockholm, Sweden. The study has been conducted with the purpose to examine of how public attitudes towards congestion charging looks and the reason behind the attitude. And also to examine if there are any differences in attitudes between those living inside and outside the payment zones, between men and women and between car owners and those who do not own a car or have a driver's license. The study used a questionnaire sent out electronically to a group of friends of friends and of friends? family members.

Den kamoflerade värdegrunden : En undersökning om hur värdegrunden i Lpo 94 visar sig i fyra ungdomsromaner

Then the language learning process and the approach in a preparatory class differs itself from a general class. The methods conducted in a preparatory class are not just focused on teaching as in a more traditional method. Achieving the objectives in a preparatory class depends on the individual student and the cohesion in the group. Students have different backgrounds and knowledge level, therefore it is extremely important that the teachers use different work methods in order to achieve and to promote the students' language development. The aim with this survey is to get the knowledge about what education methods is being used by teachers in a preparatory class.

Kraftkabelförläggning i mark : - en studie av produktionsmetoder

The assignment given to us by NCC was to compose a degree project based on ground excavations for power cables. The aim of the study was to examine suitable excavation methods depending on different possible terrain conditions. The amount of previously written material within this subject is nearly non- existent and therefore there is a genuine interest by the NCC to receive a compilation of different production methods. The greater part of this study is based upon interviews with several companies active within this area of expertise. The technique of placing the electricity grid beneath ground for safety is today getting more and more common.

Fördelning av frambensskador på ytliga böjsenan hos galopphästar :

Superficial digital flexor tendon injuries are common causes of premature retirement or pre-longed convalescence periods for race horses. The curve gradient at Täby Galopp race track is very small and most races as well as high speed training are done on the left rein. It is believed that the horses left foreleg is under considerably more strain then the right foreleg when being ridden on the left rein during gallop at high speed. During gallop on the left rein the horse puts its entire weight on the left foreleg when regaining ground contact. The purpose of this study has been to find out, through analyzing the statistics concerning the horses that visited the ATG clinic at Täby during a period between January 2003 and September 2006, whether there is a higher frequency of superficial digital flexor tendon injuries on the left leg rather than the right and if so, can this support the theory that the design of the race track in combination with continuous left rein races can be a contributing cause of these injuries. The result of the study shows that 57% of the tendon injuries occurred on the left front leg and 38% on the right front leg. The difference is not large enough to support the above theory of the underlying cause of these injuries..

Industriellt Byggande? En Studie av ICT-Verktyg förInnovativ Produktframtagning

EPiServer is a content management system where users can publish information on a website by using a web browser. EPiServer has a built-in search engine that is very simple. Many customers using EPiServer web publishing system is in need of more functionality than is offered by EPiServer's built-in search engine. The purpose of this thesis is to develop additional functionality extends that the built-in search engine in EPiServer. The assignment was also to identify what need to be developed in order to give customers a better  opportunity to help their visitors find the right information on their website.Since this thesis was started in 2005, a number of commercial search engine productsentered  the market and it has become more common for companies to invest inthese products instead of using the simple search engine that's built into EPiServer.These products have many of the features that have been developed in this thesis.Another crucial difference between EPiServer?s built in engine and other products isthe method used to index content.

Renal dysplasi hos hund :

Renal dysplasia is a developmental anomaly of the kidneys which is considered to be the primary lesion in juvenile progressive nephropathy, a condition leading to chronic renal failure in young dogs. It is defined as disorganised development of the renal parenchyma due to abnormal differentiation, and pathological lesions include persistent foetal structures, dysplastic tubules and cartilaginous and osseus metaplasia. The aetiology of renal dysplasia in dogs is still unknown, but possible causes are infection with canine herpesvirus, teratogenic substances or intrauterine ureteral obstruction. In some breeds renal dysplasia is a familial or inherited disease. Clinical signs of chronic renal failure, such as polyuria, polydipsia, vomiting, weight loss, anorexia, lethargy and anemia, usually appear before the age of 2 years.

Läkares användning av medicinska tidskrifter ? Är sjukhusbibliotekets bestånd en viktig källa?

The purpose of this study is to find out how and to what extent doctors use the hospital library?s collection of print and electronic medical journals. Major changes have the last years occurred in the journal collection. The journals are very costly and little is known about the user satisfaction with them. Therefore it?s important to examine how satisfied the users are with the collection and how they utilize it.

Jämlikhet eller samhällsutveckling? En ideologianalys av den svenska statliga kulturpolitiken

This Bachelor?s thesis examines and describes the governmental cultural policy in Sweden. The relation between the state and the market in society is in focus. Earlier research is used to describe the development of cultural policy in Sweden after the world war two until today. Two governmental bills are examined and described, one from 1974 and one from 2009.

Gapet mellan teori och praktik i pappersprototypande : en studie i diskrepans mellan det ideala arbetssättet akademin förespråkar och hur praktikern faktiskt arbetar

This study presents an alternate viewpoint to the strive to overcome the gap between research and practitioners within paper prototyping in interaction design. Earlier research identifies three aspects of this gap, which is:Practitioners being unaware of interaction design methods and theoriesPractitioners being aware, but choosing not to apply these methods and theories, due to time, budget and constraints of labourPractitioners and research having different perspective on similar design issuesOur study was done by carrying out qualitative interviews with interaction designers based on two digital design bureaus. One of the bureaus has an expressed link to research: the other has not. Our hypothesis is that the gap would manifest as a difference in work practice between the two bureaus.Our study shows that the two bureaus have similarities in work practice and that this work practice is based on scientific methods and theories, but is adapted to fit the client and/or the project. We conclude that the overcoming of the gap might not be necessary.

När kameran inte räcker till

Image editing software offers unlimited possibilities to alter an image. Provided that digitalinnovation is not altogether positive, it is important to develop knowledge of its negative sides. Thispaper examines the use of digital image processing from a critical IS perspective. Throughqualitative interviews with professional retouchers, the study provides a picture of their ethicalrelation to the software they use for retouching images in advertising. Though, it turns out that thecustomers who order the retouching holds responsibility for what is altered.

Proveniensbestämning av vikingatida hornmaterial : En studie utifrån stabila isotoper

The main aim was to investigate the provenance of Viking age antler material findings of moose and red deer from Sigtuna and from three sites on the island of Gotland in the Baltic sea. This was done by analysis of the stable isotopes of carbon, nitrogen and sulphur. Thre were never any living population of these mammals on Gotland during the Viking age.?34S-values of sulphur from this study was compared with earlier research and by studying maps of the Swedish bedrock. The ?34S-values were more like the ?34S-value for bedrock other than European granite.

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