The need for snow-free surfaces at squares, bus stops, platforms, car parks and sports facilities increases and at the same time energy price rise and the environment is becoming a hotter issue. The construction of the ground heating systems often lack thermal insulation under the heating pipes, which means that the heat from the pipes not only warm up the soil surface but also heats the surrounding soil. The insulation also has more features, by insulating the risk of frost damage is minimized. The goal of this report is to demonstrate the large heat loss and energy costs in the absence of insulation under the heating system.The report begins with a scientific way to study and treating the soil heating system uses, and the theory involved. Furthermore it also deals with different routing principles of heat pipes depending on the facility.All calculations are made with so called finite element method (FEM), in COMSOL Multiphysics 3,5a, where models are created with different conditions.

The purpose of this thesis has been to develop a tool for modelling and simulating the nuclear plant Ringhals 3. The model should be used to improve the knowledge on the dynamics of the plant. Ringhals 3 is being upgraded to produce more power and a tool for analyzing the new operating conditions is needed.The work in this thesis has consisted of improving and developing an existing model of Ringhals 3 made with the modelling tool Dymola. The model has been validated by comparing the results of a simulated house load transient with data from the actual plant. Validation shows good agreement with data from the real plant.

This paper attempts to investigate the correlation of 12 month abnormal returns and the fundamental value of stocks in theSwedish stock market between the year 2000-2011. Also, the paper tries to apply and evaluate the concept of the margin ofsafety. In estimating the fundamental value we use the residual income valuation model and three different estimationapproaches of the beta coefficient in order to correct for financial and operational biases. We find that our different portfoliosearn abnormal returns. However, this could be explained by the size effect and P/B effect.

This thesis has been conducted at Saab Bofors Dynamics AB. The purpose was to investigate if a non-linear missile model could be stabilized when the optimal control signal is computed considering constraints on the control input. This is particularly interesting because the missile is controlled with rudders that have physical bounds. This strategy is called Model Predictive Control. Simulations are conducted to compare this strategy with others; firstly simulations with step responses and secondly simulations when the missile is supposed to hit a moving target.

SUMMARY The purpose of this study was to explore how nurses in the emergency department experience and cope with stress in their workplace. The study had a qualitative, descriptive approach and was based on nine individual, semi-structured interviews. They were then processed using content analysis. The content analysis of interviews resulted in two categories, "the nurse's experience of stress," "the nurses coping with stress." Together, the categories highlighted how nurses experienced stress during and after their shifts. The study showed clearly that all nurses experienced and coped with stress in their daily work activities..The authors noticed that stressful time for the nurses were repeated at each session and were similar in character.

The environmental debate is more intensive than ever before and the demands on companies increase. There are a number of methods to make it easier for the companies to fulfil the demands. Life Cycle Assessment (LCA) end ecodesign are some of the methods that can be used. Syntronic AB has the possibility to reduce the products´ environmental impact in the design phase. Therefore it is important for the company to make it possible to visualize the negative environmental impacts a product can cause in an easy way. It is also important to visualize for there clients if any improvement is possible. The purpose of this thesis is to develop a simplified model.

Currently, there are no clear statistics on how the floor plan and room size in apartment buildings has changed over time since the postwar period. The statistics available is average area per apartment which can be found on Statistics Sweden's website. This report has the aim to increase knowledge about how the Swedish home have changed over time.The questions that the report will answer are:For apartment buildings, how has the living area been distributed since the postwar period?Why has the area distribution changed over time?A survey of the houses built during 1950-2014 was made before questions could be answered. A case study was also made which a total of 90 apartments were analyzed and divided into three eras, the people´s home, the million programme and the neomodernism.

This thesis intends to analyse conditions for a successful implementation of consociational democracy, as a democratic model in Afghanistan. The lack of critical reviews regarding the democratisation-process in Afghanistan initiated the purpose of this study.Lijpharts democracy model was used as the basis in the comparative study. Along with empirical evidence regarding how the complex process of democracy in Afghanistan is progressing, the study investigated whether the identified conditions occurred or not.The choice of which democracy model to use can be crucial for the democratic possibilities to even survive and become established in conflict-affected communities. The principle of consociational democracy is that it is an empirically based normative model that aims to organise the state in a way that works against the risks of majority domination and oppression against the minority.The empirical case study revealed that a majority of the conditions were not met, which then can counteract the possibilities for consociational democracy in Afghanistan. The study has critically examined the prospects for the success of consociational democracy in Afghanistan, and it can be assessed that there is a limited probability for a successful applying of this model..

The purpose of this thesis has been to develop a tool for modelling and simulating the nuclear plant Ringhals 3. The model should be used to improve the knowledge on the dynamics of the plant. Ringhals 3 is being upgraded to produce more power and a tool for analyzing the new operating conditions is needed.The work in this thesis has consisted of improving and developing an existing model of Ringhals 3 made with the modelling tool Dymola. The model has been validated by comparing the results of a simulated house load transient with data from the actual plant. Validation shows good agreement with data from the real plant.

The purpose of this thesis has been to develop a tool for modelling and simulating the nuclear plant Ringhals 3. The model should be used to improve the knowledge on the dynamics of the plant. Ringhals 3 is being upgraded to produce more power and a tool for analyzing the new operating conditions is needed.The work in this thesis has consisted of improving and developing an existing model of Ringhals 3 made with the modelling tool Dymola. The model has been validated by comparing the results of a simulated house load transient with data from the actual plant. Validation shows good agreement with data from the real plant.

Since the wild boars (Sus scrofa) escaped from their enclosures in the 1970s, their numbers has increased dramatically. It is an animal that is currently involved in many traffic accidents. The wild boar is a popular animal to hunt. As the population has grown so has the hunting. But, unfortunately, there have also been an increased numbers of attacks on hunters.

Today the ability to swim is taken for granted by most people. Most of Sweden?s adult population can swim which is reflected in the reduced number of accidental drownings. About 1900 AD when Sweden?s population was about five million the average drownings per year was 1100.

Purpose  The purpose of this paper is from a consumer perspective analysis whether or not blogs are affecting a customer?s purchase behaviour to a larger extent compared to traditional marketing methods through TV commercials. Additionally, within the scope of this try to identify the type of consumers that are more influenced to a purchase decision by blog contents compared to others.Methods Through a quantitative approach this study will examine the effectiveness of advertising in blogs. A survey was used in order to collect data where the respondents corresponded to the population in Sweden in the ages 15-79. Initially the size of the blog audience was estimated and thereafter it was examined how many of these that were affected towards a purchase decision by blogs.

The little steel industrial community Hofors is situated in Gästrikland on the border to Dalarna and its population is decreasing every year. The biggest housing operator is in a place where they must tear down a lot of buildings because they do not have enough tenants. But what do people really want in an apartment and in the surroundings? What is needed to make it attractive? That is something that this study will discuss and in the end it will lead to a proposal of an area that is suitable for a new housing and a few proposals to make the existing apartments more attractive..

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.