Powder Metal (PM) gears are machine element components which operate under the same principle as conventional gears, but, due to their intrinsic material characteristic need to be designed slightly different, and its manufacturing process offers advantages previously unobtainable by conventional steel gear manufacturing methods. The use of PM in similar applications, such as synchronous hubs, makes them a suitable candidate for production in such material. The current master thesis work focuses on gear design using PM by utilizing finite element method (FEM) to reduce weight and inertia taking into account root bending strength and tooth deflection.First a topological optimization is used to determine feasible candidates for different web designs which have as objective to reduce volume, similar topologies were shown during different loading conditions; and hence, this topology was chosen as a suitable candidate. A shape optimization of the topological candidate was performed having as state variables root bending strength, independent for compressive and tensile side of the tooth loading; and tooth deflection, which in concept can be correlated to static transmission error (TE).Another aspect in this thesis analysed is the possibility to incorporate non-trochoid root geometry, a trochoid root is always present when machining with a hob, into the gear root and hence reduce the stress concentration here. Due to the use of PM, a non-symmetric optimized root can be achieved and hence be optimizing compression and tension.Results showed significantly lower inertia, for example certain results showed 40% reduced when compared to solid gear, with adverse effects as increase in tooth deformation and increase in maximum principal stress.

The purpose of this study is to survey and evaluate if the individual contrast sensitivity and preferences for horizontal and vertical lighting level correspond to the values that standard SS-EN 12464-1 recommends for the workplace- and surrounding light levels.This study examines if lighting should be adapted after the individuals? need or if a general value can be found that will cover every individuals? need for a workplace and surrounding light level. This study also examines if parameters like sex, age and/or glasses/lenses have an effect on the amount of lighting that the test subjects need. Lastly we compared the values concerning the relationship between workplace- and surrounding light levels with standard SS-EN 12464-1?s recommendations.The study is carried out with an experimental design that surveys 220 test subjects who were chosen by a selection of convenience.

In this thesis I based on Fowler?s method of syntax analysis construct a flow scheme which I then use to make a syntax analysis of former State Secretary Lars Danielsson?s statements, in his autobiography, regarding his responsibility in the Swedish government?s management of the 2004 Indian Ocean tsunami disaster. The focus of the flow scheme is how grammatical constructions can be used in the interest of rhetoric?s to on the syntax (non-explicit) level of the text indicate and place responsibility with or outside of involved individuals. The main conclusion of the syntax analysis performed is that Danielsson in his autobiography in fact does not use very many of the constructions described in the flow scheme, whereby it can be concluded that the syntax analysis in this case wasn?t so ?revealing?.

The purpose of this thesis is to draw a picture of pedagogical work at the senior level with a critical perspective of information and media. As a method for gathering material for the analysis, a case study was made with qualitative interviews together with documents that describe the case. Relevant literature for the subject has been used as an introduction and as a theoretical basis. The literature concerns subjects such as a childrens relation to media, the schools intructions, the role of the school library and some theories regarding learning. The conclusion is that the respondents focus on conversations and reflection regarding the sources of information and its use, and that the childrens adaption of the material is an important factor in teaching.

The Swine flu (H1N1) erupted in 2009 and wasquickly spread over the world and developed into a pandemic, with a great threat against people?s health. It was soon discovered that the H1N1?virus had a different character than the seasonal flu, since it especially affected younger individuals and the consequences from the disease were expected to be more severe. In Sweden it was decided to provide a free of charge vaccination against the H1N1-virus, and the Swedish vaccination ratiobecome relatively high compared to other countries.

Today the human being see energy as a matter of course but the resources that is used for extract energy is today not enough for the world demand. Of all the energy that is used in Sweden today approximately 40 % goes to the building stock. This number will most likely increase if not necessary actions will be made on the already existing building stock since new houses constantly are built which will be added up on the already existing energy supply. This takes cause of action on the already existing building stocks, to fulfill the demands of the future use of energy that has been set by the authority. At the same time the thermal conditions cannot be influenced by the necessary changes that must be made.

The purpose of the present study is to describe adult second language learners? experiences of mathematics learning from a past and contemporary perspective. What experiences in mathematics do they bring? What does it mean to learn Mathematics through their new language?The study is based on life-world narratives from five second language students with another native language than Swedish. Today they all study at a Swedish folk high school, at upper secondary level and they have previously studied at this level in Mathematics. The result shows that the meeting with the Swedish school and folk high school context is confusing.

Time Perspective is related to mental and physical health. This study examines the relationship between Time Perspective and perceived stress where Time Perspective was expected to predict the level of perceived stress. Past-negative, Future-negative, Future-positive and present-fatalistic were expected to be positively associated with perceived stress while Past-positive and present-hedonistic were expected to be negatively associated. Measures from the self-assessment forms S-ZTPI, PSQ-recent and CES-D from 445 participants (242 women, 203 men) between 60-90 years were used to examine the hypothesis of the study. Two hierarchical multiple regression analysis confirmed that Time Perspective is associated with perceived stress and in part 2 explains it's variance, one when adjusting for demographic data (.R = .37) and the 2 other when adjusting for demographic data and depressive symptoms (.R = .13).

The demand for renewable energy is increasing in Sweden. This consequently increases the pressure for and willingness to pay for forest fuels. One method to extract forest fuel from suitable commercial thinnings is the "long top method? (LT-method). With this method saw logs and non-delimbed tops are recovered, i.e.

The focus of our dissertation is masculinity which is often a topic of debate in today?s society concerning areas such as violence, sport and paternal leave. Male studies are a relatively new field which means there is a lot remaining to be explored. We have chosen to explore how social class reflects on male identity. The reason we have chosen social class as a variable is due to a focus in the general debate of identity amongst the social sciences towards identities formed through consumption in the world of global mass-media.

Introduction: Taxes result in a big cost for corporations which create an incentive for tax planning. Previous studies have demonstrated that it's the management team and the board of directors that influences to what extent the corporation is going to tax plan. We want to study underlying factors for how the composition of the groups affect the tax planning in a corporation based on four demographic traits; sex, nationality, age and duration.Purpose: The purpose with the study is to explain how the composition of the management team and the board of directors affect the corporations tax planning.Method: The study has a deductive approach where theories about the composition of the board of directors and the management team have been used to derive hypothesis. The empirical material has been collected from Nasdaq OMX Stockholm. Two different measures have been used to calculate the corporations tax planning.Results and Conclusions: The result of the study demonstrates that the composition of both the board of directors and the management team has an effect on corporations tax planning.

The question of the provision of electronic books in Swedish public libraries has lately evolved into a lively debate in Swedish media, where the public library?s identity and itsexpected role as a democratic institution is an underlying topic. The aim of this bachelorthesis is to examine the idea of the public library?s identity as expressed in newspaperand journal articles by writers connected to the library sector. The aim is achieved byexamining the language-use and identifying discourses in the debate.

The aim of this piece of work is to highlight and investigate young female?s motivation in participation of P.E classes and the degree to which the content of classes affect their motivation. To support this piece of work two theories have been utilized, the Self-determination Theory and a gender related perspective theory. The research consists of six qualitative interviews of young females who are perceived to be less motivated. These interviews focus on their views and attitudes in relation to P.E within the Swedish high school setting.

The purpose of the study has been to recognise good development and the factors behind this development. We have chosen an aid-project co-financed first by the Swedish government and later by the government of Great Britain for our study. One of the conditions for good development, according to our chosen theory Another development, is peoples participation. To study good development and peoples participation we conducted a Minor Field Study (MFS) in Rajasthan in the north-west of India in June-August 2001. We had a hermeneutic approach and consequently accomplished interviews and participant observations in the Lok Jumbish project in Rajasthan.

The aim of this Masters thesis is to examine how five childrens librarians in Ireland and five in Sweden interpret and implement the United Nations Convention on the Rights of the Child in public libraries. This study is hermeneutic. Using a qualitative method consisting of ten interviews with childrens librarians and structural factors such as; library policies and laws; together with an insight into Irelands political, social and economical history and the historical development of childrens public libraries in Sweden and Ireland, has enabled us to create an understanding for the interviewees statements. Anthony Giddens structuration theory has been used for the analysis, helping us to determine how the duality between the structure, the actors and their action effect the interpretation and implementation of the Convention in librarian work. The result of the analysis clearly shows that in comparison to Irish librarians, the Swedish interviewees are more aware and have a better understanding of the Convention and how to put it into practice.