During the 19-century a global warming has been observed, which includes increases in global air and ocean temperatures, widespread melting of ice and snow, and rising global sea level. There is a clear connection between emissions of greenhouse gases caused by the human and the increase in temperature. Climatic changes caused by global warming can be stopped trough decreased emission of fossil fuels, for example by an increased use of biogas. Biogas is a renewable energy source which is produced through anaerobic (oxygen free) digestion of organic material. The gas is a mixture of methane (CH4) and carbon dioxide (CO2) and can be among others used as fuel in vehicles.

In this project we have used the theory of analytical mechanics to derive equations of motion for complex mechanical systems in order to study their behaviour over time. Even if the theory provides powerful tools to tackle tough problems which would be very hard to solve by methods of Newtonian mechanics, you are still relatively limited without running any computer simulations. One realises that in a faster rate it will be an incredibly difficult task to find an analytical solution when the degrees of freedom increases. Even if one would succeed to derive the equations, one still has to solve them to get the information of the systems behavior. Of experience one knows that the equations in general are nonlinear and hence must be integrated numericaly.

The building industry consumes approximately 40 % of the total energy consumption in Sweden, where the using stage is dominating with 80 %. There is a lot of work in progress to reduce energy use in the building industry, and the demands from authorities regarding energy use increases. As a part of this work Building and planning department of Sweden has established a requirement that has been applied since 2006, and restricts a maximum energy use for buildings.The requirement includes that an energy simulation must be done in advance to demonstrate that it is possible to meet the demands.Reality is however more complex than an energy simulation program, that frequently underestimates the energy use of buildings. The purpose of this thesisis to study and analyse deviations between estimated and actual energy use in modern apartment buildings. The study includes four apartment buildings in Stockholm, Gothenburg and Jönköping that were built in 2007-2009.

Gambling about money is a frequent phenomenon in our modern community?s. The gambling has for some people resulted in a compulsive gambling. These consequences affects not only the gambler but also have impact on his or hers relatives. The purpose of this study is to describe how a small selection off relatives to persons with a compulsive gambling experience the gambling consequences in there life.

This master thesis is a study of anaerobic thread lockers and is done in cooperation withÖhlins Racing AB, which is a Swedish manufacturer of vehicle suspensions.The suspension in vehicles is constantly exposed to high vibration levels and a suspensionunit has several screw- and cylindrical joints. As an extra safety precaution so that thecomponents in the suspension doesn?t fall apart when using the vehicle, an anaerobicthreadlocker is added in these joints. The handling of these threadlockers is not totallyharmless and could lead to allergic reactions, and therefore there are Swedish laws to limit theuse of these. However, new types of anaerobic threadlockers have recently been launched onthe marked that are not considered under this law.

In this project we have used the theory of analytical mechanics to derive equations of motion for complex mechanical systems in order to study their behaviour over time. Even if the theory provides powerful tools to tackle tough problems which would be very hard to solve by methods of Newtonian mechanics, you are still relatively limited without running any computer simulations. One realises that in a faster rate it will be an incredibly difficult task to find an analytical solution when the degrees of freedom increases. Even if one would succeed to derive the equations, one still has to solve them to get the information of the systems behavior. Of experience one knows that the equations in general are nonlinear and hence must be integrated numericaly.

Background: Patients with heart failure is a patient group growing in numbers, the most common treatment focuses on reliving symptoms and the only cure is heart transplantation. Objective: Aim of the study was to illuminate patients' experiences of living with heart failure at his home. Method: Qualitative design, with a manifest content analysis. The results are based on 12 scientific articles.  Results: Patients with heart failure find that the disease is limited to their daily lives through mental illness and physical symptoms.

This study investigates three different methods for evaluating MOE,Modulus of Elasticity, in field measurements. The purpose is toinvestigate the possibility to use dynamic measurement methods infield measurements that hitherto (2010) has been performed with staticmethods. The objects of investigation are 20 glulam beams. The firstfield measurement took place in november 2007 and applied a staticmethod based on the standard SS-EN 408. The second measurement,described in this study, took place during summer 2010, and appliedstatic as well as dynamic methods.The MOE of wood is affected by a range different factors.

The digitization in the Swedish health care sector is rapidly growing. This study investigates whether the digitalization in health care has led to higher quality and an increased value for patients. Interviews with staff in various health care professional categories were conducted to qualitatively study how the implementation of digitization is perceived in practice by those directly involved. Furthermore, an observation was made, where a doctor was followed duringa workday to study the different digitalization software tools that are being used. Previous studies and other relevant literature accompanied the study of digitalization in health care. Organizational theories were compared with the practical organization management at the studied health care organization, as well as their dependence on other authorities and companies.

Title: Consequences of diversion ? a qualitative interview study regarding illicitbuprenorphine use.In year 1999 buprenorphine was introduced in Sweden and is used in treatment for opioiddependence. An issue concerning substitution treatment programmes is the occurrence ofdiversion and the following illegal sails of buprenorphine on a black market. The aim of thisstudy was to explore how people who have used illicitly obtained buprenorphine describessuch abuse. The study was conducted using qualitative method, where a total of fiveindividuals were interviewed about past experiences of having used illicitly acquiredbuprenorphine.

During this master thesis, wear and friction properties for the high-temperature alloy Kanthal APMT were studied. The results were also compared to 253MA. The initial tests showed, among other things, that the surface fineness of the muffle tubes matters in real applications like conveyor belts. A 253MA-sample wear-tested against a 253MA-tube showed lowest wear at 900°C while a pre-oxidized APMT-sample wear-tested against a APMT-tube had the lowest mean value of the friction force at 1100°C, compared to all other tests..

The purpose of this study is to find out how the non-governmental shelters for battered women identify themselves in context of their dependence and cooperation with the municipality. Their legitimacy is also investigated which is based on, along with identity, key concepts of the neoinstitutional organization theory. The mutual dependency between these two actors is problematized along with the question of who is responsible for assisting the battered women, and who takes on the responsibilities for them. The empirical result that is analyzed was gathered through three qualitative semi structured interviews with employed personnel at three different battered women?s shelters in three different municipalities in Sweden.

The consumer society exploits the earth?s resources more than the earth itself has capability to produce. This over-consumption causes a mass production of products, which mean that more greenhouse gases are being emitted to the atmosphere. This is one of the reasons why the earth?s temperature is rising, where the result of it is worldwide disasters.

SUMMARY Several studies have shown that weaning pigs are in great need of heat. The reason for this is mainly because the pigs are given very little feed just after weaning. Some of the pig producers of today have tried to get along with these problems by building some kind of hut for the pigs. Some of these pig houses have been included in this study.The study has shown shortcoming functions for the pig cottage. The expected heat increase has not occurred.

This report describes an investigation of the indoor climate in two different workspaces. Since we a big part of our lives are staying indoors in artificial environments, and more particularly in our workplaces, we think it would be interesting to do this investigation. The technical solutions for air treatment systems began with simple natural systems without fans and where the thermal rise of the air applied. In modern time is technical air treating systems used to take care of the fresh air supply. This type of units can supply filtered air with the right temperature to the building. Well-functioning ventilation is essential to bring clean fresh air to the room and effectively remove impurities without sound- or draught problems. The indoor climate is relevant for the output capacity.