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Chiral perturbation theory is an efficient effective theory to describe meson-meson scattering at low energy. An effective theory naturally introduces low energy constants and they are used, for example, to solve the ultraviolet divergences. The aim of this master thesis is to focus on meson-meson scattering to find some theoretical bounds on the coupling constants, based mainly on arguments from

This paper is a study of how actors have chosen to utilize the videogame Minecraft, as a way of getting citizen involved in the planning of spaces. This is done by interviews with people in charged for leading the projects, in aim for answering if citizen participation is increased. But also what the method requires and who it speaks to, and what effectiveness that is achieved in the process. The

With climate change unfolding, there is a need for adaptation policies that support the most vulnerable. Knowledge of the interconnection between adaptation policies and inequality is however limited, especially regarding power relations and institutional factors. Using data gathered in interviews with public officials and NGO representatives, this thesis explored the interaction of climate change

The purpose of this work was to investigate if the choice of frequency, on a pulse width modulated control signal to a DC motor, might influence the behaviour of the system, as wall as to see how the system reacts in connection with the controlling by means of such a signal. I came to the conclusion that the frequency was not critical seen from the system's point of view, but should be chosen

The purpose of this report has been to find suitable methods and programs for simulation, in particular of production flow systems. Only few methods of this subject have been developed, and therefore a considerable time has been used to find the basic facts. The problem has been attacked with two different methods. The first one is a simulation program which has all decision rules mathematically d

A simple mathematical model has been made for the heat exchange in a freezing chamber. By this the contents of the room have been regarded as a warm and a cold mass. Equations for convection and radiation between these masses, the room air and the cooling pipes have been made from physical data. The heat transference in the articles, which is described by partial differential equations, has been a

The theme for this analysis comes directly as an assignment from Svensk Elitfotboll (SEF) with the purpose to analyze and compare violence crime rate between high risk football matches and festivals. The reason for this is that SEF has come to believe that football matches tend to be described as more dangerous to the public than festivals and therefore giving the whole experience of going to see

The sun is an important reason to why there is life on earth. To be able to predict future solar activity it is important to uncover past solar activity and its cyclicity. This thesis investigates the solar activity throughout the past 2000-years to the beginning of 21th century. Diagrams which contain relevant data from radionuclide and sunspot records have been constructed to get a better overvi

Sweden's public sector is drastically changing through reforms of privatization and increased market influences. The aim of this thesis is to examine these reforms' effects on political accountability. The object of study is the regional municipality of Scania, Region Skåne, and its elected officials' possibilities for accountability from the privatized primary care section of the regi

Considering the growing importance of environmental issues on the international political scene, the question arises as to how these issues are incorporated into the agenda and procedures of international organizations (IOs) and institutions. The World Trade Organization (WTO) - one of the largest IOs – has to handle a strong mandatory connection to global trade as well as an increasing environmen

The purpose of this thesis is to analyse how the Swedish newspapers' use of party-preference polls has changed over time. I study 246 articles published by Göteborgs-Posten, Dagens Nyheter, Aftonbladet and Expressen, and compare the time-period 1994-1996 with 2010-2012. Amongst other things, I look at the news-papers' reporting of basic statistical information in their polls, as well as th

This thesis aims to examine the link between socio-economic factors and persistent high fertility in Niger. A national comparison with Senegal – an early fertility transition country – serves as reference point to understand the phenomenon on the basis of associated fertility patterns and drivers. Expertise on child-bearing behavior can guide policy intervention, which in turn mitigates negative c

The past six years have seen the development of fast and accurate single-particle sources, with possible applications in metrology, nanoelectronics, quantum information processing, and single-electron quantum optics. These mesoscopic devices also enable us to gain more insight into the quantum mechanics of interacting fermions. In the present work, we study the energy spectrum of the emitted state