This thesis work is the last part of the Master of Science education inmechanical engineering at KTH, Stockholm.The aim of this project was the development of a Multi-zone modelfor NOxformation in Diesel engines. Because of the stringent emissionlegislations, great effort is made to decrease the fuel consumption and theharmful emissions of internal combustion engines. Computer simulationsplay a decisive role in this context because they substitute the expensiveand time-consuming laboratory tests.The model is based on a multi-zone approach and uses the wellknownExtended Zeldovich Mechanism which gives a relation to calculatethe NO formation rate using the concentration of different gas speciesinvolved in the process.All the most important phenomena involved in the Diesel combustionhave been modelled. A special attention is then paid to the equilibriumconcentration calculation; this is a significant part of the model whichstrongly influences the following steps.A Simulink model has also been developed. This second version isbased on the previous model and it is made especially to allow theconnection with other external softwares, GT-power in this case.

Landscape architecture is a visual profession, but other senses also affect our interpretation of a place. Sounds can give us a lot of information about an environment, and they are often perceived as positive. Despite this, research about outdoor sounds most often focus on the reduction of unwanted sounds ? noise ? but the absence of noise does not result in a good soundscape. To accomplish this, sounds we appreciate are needed.

Sweden have 419 000 km road in the country and about half of these roads is forestroads. The forest road net most important mission is to make it possible to deliver wood from the forest to the industries. With a raw material that is spread over a large area the road network is important. Each year has the forest road network been extended with about 1 700 km new roads. To decide if a new road is to be built different forest road cost estimation models has been used.

Yesterdays common fertilizing strategy was to apply phosphor (P) and potassium (K) in thefall a few times in the crop rotation. In the spring only nitrogen (N) was applied. Recent trialsand studies has shown that this strategy, N+P/PK, is ineffective compared with the systemwhere NPK is spread every year in the spring. The strategy with annual NPK-fertilizer in thespring has proven to be better for the crop, the environment and the farmers economy.In the NPK-system the crop responds with higher yields and better quality, especially in thespring cereals. This is mainly because of an interaction between the different nutrients in thefertilizer.

Introduction: Anxiety and depression are common among patients enrolled in psychiatric outpatient care. Ear Acupuncture is an alternative form of treatment that has been shown to relieve anxiety and depression in previous studies.Aim: To evaluate ear acupuncture as a group treatment for depression and anxietyMethod: A psychiatric outpatient clinic has been offering group treatments with ear acupuncture for anxiety and depression for 5 weeks. Participants of the study have answered self-rating scales Montgomery Åsberg Depression Rating Scale, Beck Anxiety Inventory and Sheehan Disability scale before and after the treatment period. Material was collected in the period 2008-2012 and has been analyzed in SPSS.Results: Data from 31 patients were included in the study. The results from the study showed a significant difference, between the measurements before and after treatment, with a reduction of the average values in the three different scales.Summary: From this study, it is difficult to draw any conclusions about the effect of ear acupuncture.

The aim of this thesis is to examine how secondary teachers in the subject of history are using the textbook in their teaching. Four questions are being dealt with in this thesis. What importance is being placed on the use of history textbooks by the secondary teachers? What priorities do the secondary teachers have? How do they deal with student interests? And what is the importance of the secondary teachers? work experience? I have interviewed four secondary teachers with different work experience to complete this thesis. A Dictaphone has been used in all the interviews. Research has shown that textbooks now have a central role in teaching and the lack of alternative materials and reduction of teaching hours has made it difficult to replace. The main conclusions of the thesis are that the history textbook has a dual role depending on the teacher you ask, and that the history book is used differently by the teachers.

This thesis is a feasibility study for a future product development project. The purpose ofthis project is to evaluate the possibilities and difficulties associated with the design of anelectric power assist servo for all terrain vehicles (ATVs). The project has been carriedout in collaboration with Nira Control AB. Nira designs and manufactures electric andelectro mechanic products mainly for the motor sport market segment.Nira Control AB is developing a fuel injection system for a new line of large ATVs oncommission. To be able to compete with manufacturers like Yamaha and Honda thecommissioner should be able to offer optional power assist steering.

The purpose with this essay is to investigate whether the legal capital can be justified as creditor protection and whether the legal capital prevent entrepreneurship.Historically the legal capital has been justified by means of creditor protection. Nowdays the development within EU rather reduces or abolish the legal capital. Sweden has recently, 1 of April 2010, reduced the legal capital from 100 000 Swedish crowns to 50 000 Swedish crowns. In the preparatory work it has been admitted that the legal capital does not in reality offer creditors much protection. Although the lawmaker decides to retain the legal capital and justifies the legal capitals existence with the argument that involuntary creditors has the need of the legal capital.

The building and plant sectors represent a large part of Sweden?s energy use. Putting energy requirements in public procurement as a tool for reducing energy consumption in the building and plant sectors is therefor an opportunity that operators can take advantage of. The aim of this thesis was to map the energy requirements in procurement that operators in the public sector use today in building and plant projects. The analysis was made with respect to if the energy requirements corresponded to the parts with large energy use in building and plant projects and also in which way energy requirements in procurement are written in the contract.

The mining industry, in terms of ore excavation and metal production, is and has been important to the Swedish economy. In connection with the ore excavation process, large amounts of partly sulphidic waste are produced. When the metal sulphides are exposed to air and water they are eventually oxidised, which leads to the formation of acidic water with high concentrations of metal cations and sulphate ions, so called Acid Mine Drainage (AMD). This water may reach the nearest surroundings and cause negative environmental effects. By covering the waste with soil or water, the oxidation process can be minimised. At the Rävlidmyran mine in the county of Västerbotten open pit mining took place between 1951 and 1991.

Denna kvalitativa undersökning gjordes med ett öppet, datorstött intervjuformulär som skickades till socialsekreterare i fyra kommuner i Sverige. Det som undersöktes var socialsekreterarnas attityd till metadonbehandling vid heroinberoende och om dessa attityder skildes åt mellan de olika kommunerna. Genom den hermeneutiska ansatsen, meningstolkning och tillförsel av relevanta teorier tydliggjordes resultatet för läsaren. Då undersökningen är kvalitativ med ett mindre strategiskt urval var det svårt att i stor utsträckning generalisera. Trots de dokumenterat goda forskningsresultaten av metadonbehandlingars effekter och avsaknaden av andra mer effektiva behandlingar har idag mindre än 20 procent av Sveriges aktiva heroinmissbrukare möjlighet att bli beviljad denna form av behandling.

AbstractMotor sports have been around as long as motor vehicles have been. Sports are often seen as costly polluter but in the same time the motor sports have encourages a large part of development, both for vehicles and other industries. Inventions like rear mirror and ABS brakes come from motor sports. One way to once again drive development forward while making motor sports carbon-neutral is to run the race cars on hydrogen. In this thesis, the goal is to convert a spark ignition engine for hydrogen operation.

The aim of this study is to point out variations of practices in the relationship between professionals of service occupations and their clients. The material consists of four openly conducted thematic interviews with male professionals who work in the environment of their clients' homes.The main theoretical approach of this analysisis undertaken with ethnicity in mind.The practices identified aim to throw light on the boundaries between the differing cultures of professionals and their clients.The analytical termsboundary reduction and boundary maintenanceare used in this research.The two-stage analysis points out different practicesused, in chronological order, during contact between professionals and their clients. This is followed by a statement of the themes which connect, primarily fromthe professional perspective. The results indicate an intimate connection between intercultural and transcultural aspects through the use of cultural transparancy, which is a strategy connecting different roles, aswell as use of loophole tacticsthat afford the possibility of definingspace, place and relationship.It's illustrated how the professionals operate from "within the structures and worldview" of the client, and this analysis also reveals a glimpse of the potential for cultural changein the meeting between different cultures..

AbstractThe future of ethanol is depending on good solutions for the production. ENA energy power plant produces electrical power and district heating by heating biofuel. By building an integrated bioenergy plant surplus steam could be used to produce ethanol as fuel to vehicle.This would mean that ethanol is produced renewable energy and the energy for the process derives from the surplus of power.  ENA energy, MDH (the University of Mälardalen) and the energy authority has initiated a research project were different bioenergy combinations integrate with existing power plant.  As a part of the project which size an integrated factory should be to gain the best efficiency for the plant was investigated. Consideration will be taken to the cost of the production in order to be competitive to the price of imported ethanol.  Etanolens framtid vilar på bra lösningar för framställning.  I ENA energi kraftverk i Enköping produceras el och fjärrvärme genom eldning av biobränsle.  Genom att bygga ett integrerat bioenergikraftverk där skulle man kunna använda överskottsånga till att framställa etanol som fordonsbränsle.

The purpose of this essay is to examine cost-benefit-analysis as a method of evaluation of labour market policy. To illustrate the possibilities and difficulties of the method chapter four contains a partial cost-benefit-analysis of the results of a labour market project in Kävlinge. The questions this essay strives to answer are the following: What possibilities and difficulties do cost-benefit-analyses entail? How would one conduct a cost-benefit-analysis of the project in Kävlinge?The method used in this essay is mainly a literature study of cost-benefit-analysis of labour market programs. The labour market project Brännpunkt is used as an example in a partial cost-benefit-analysis.The applied cost-benefit-analysis of the Brännpunkt project in Kävlinge shows that it is possible to calculate the profit for the society as a whole, given that the necessary information is obtainable.