This master thesis comprises analysis and dimensioning of a keyed joint between a generator axis and a hub with aid from the FEM-software ANSYS Workbench 13.0.The generator axis is a part of a hydroelectric power station that generates electricity with a reactions turbine, a Kaplan turbine. The existing keyway consists of one parallel key with the width 90 mm and height 45 mm. Due to a planned increase of the power of the generated power with 32 % a design study was needed to see if the keyed joint would be suitable for the extra force. Because of the fact that the axis diameter is bigger than the standards covers/recommends a the keyway had to be re-dimensioned. In an earlier assignment from Skellefteå Kraft AB to Sweco Energuide the keyway was planned to be properly dimensioned, but no final solution was approved.During this master thesis a number of different numerical tests were made.

This thesis has been carried out in New Zealand in collaboration with the University of Waikato. In association with Dr. Mike Duke the purpose of this work is to investigate whether two different software for modeling of photovoltaic systems are useful in the teaching of solar energy.The next ten years grid-connected photovoltaic systems are assumed to increase and therefore also a rising demand for people with engineering knowledge are to be predicted. For engineer students with a focus on solar energy a more practical teaching with design software´s can be a good method to make the students comprehend more when it comes to large scale photovoltaic systems and be more prepared for working life.The software´s used is called Transient System Simulation (TRNSYS) and Photovoltaic Systems (PVSYST) which are both well used throughout the world. To assess the reliability of the software´s, a reference solar power plant at 16.1 kWp installed capacity are used, which consists of photovoltaic modules from four different manufacturers.

Sahlgrenska Academyat University of GothenburgDepartment of Internal Medicine and Clinical NutritionAbstractTitle: Breakfast and cognition from a youth perspectiveAuthor: Linn Kruse and Anneli HulldinSupervisor: Anna WinkvistExaminer: Frode SlindeProgramme: Dietician study programme, 180/240 ECTSType of paper: Examination paper, 15 hpDate: May 26, 2014Background: Breakfast as an influencing factor on cognition and is often on the table for discussion in society. A lot of research has been done about how omitting breakfast affects adolescents and their short time cognition. Cognition is complex as a concept and is measured in different ways and the existing research in the area often compares different types of breakfasts instead of the difference between eating and omitting breakfast.Objective: To evaluate the scientific evidence for an association between adolescents? breakfast eating and short time effects on cognition in adolescents.Search strategy: To find relevant articles a systematic literature search was made in the databases PubMed, Scopus and Cochrane. Search terms that were used were: children, young adults, adolescents, cognition, and breakfastSelection criteria: Ages 12-20 years, measures cognition, RCT, studies comparing breakfast eating with omitting breakfast, human studies, language English or Swedish, no sick adolescents or adolescents with diagnosis.Data collection and analysis: Two original articles met the inclusion criteria and were reviewed by the SBU audit template for RCT studies.

Outages in the electric grid can be costly for society. Because of this, reliability is one of the parameters used to regulate network companies. Reliability in electrical grids can be measured with SAIDI, system average interruption duration index, which for Fortum Distribution has increased in Stockholm?s distribution network (11 kV) in the early 2000?s.By using outage data for Stockholm from 2011-2013, sets of parameters to be used for reliability calculations in the network information program Tekla NIS were derived. Two different options for investment were then analysed: changing old cables with high fault frequencies, and installing automatic switching in distribution substations.

Sahlgrenska Academyat University of GothenburgDepartment of Internal Medicin and Clinical NutritionAbstractTitle: Does supplementation of omega-3 during pregnancy affectprevalence of allergy in infants and children?Author: Peter Eliasson, Anna RahmSupervisor: Lena HulthénExaminer: Anna WinkvistProgramme: Dietician study programme, 180/240 ECTSType of paper: Examination paper, 15 ECTSDate: 2012-04-12BackgroundEpidemiologic research has shown an association between a high intake of fish and allergy.The underlying theory is that allergy develops already at a prenatal stage and food intakeduring pregnancy has been shown to be significant. Conducting research on allergy isproblematic since it has genetic, as well as enviromental, determinants.ObjectiveThis thesis attempts to conclude and evaluate research on a connection betweensupplementation of omega-3 during pregnancy and allergic outcomes in infants and children.Search strategyThe literature search was conducted in the databases PubMed and Scopus. Among thekeywords chosen were omega 3, supplement, pregnancy and allergy.Selection criteriaHuman RCT, that measured allergy, where the intervention consisted of supplementation withomega-3 for at least ten weeks during pregnancy and ceased at birth.Data collection and analysisThree articles were chosen for this thesis. The articles were examined using templates fromSBU and the quality of evidence was evaluated according to GRADE.Main resultsNone of the articles showed a protective effect on allergic outcome but in one of the studiesthere was significant reduction in eggallergy and another showed significant lower occurrenceof severe eczema.ConclusionsSupplementation with omega-3 during pregnancy does not occur to have an protective effecton allergic outcome in infants and childen but the evidence for this is considered to bemoderate.

The aim of this master?s thesis is to explore concert institutions? informative texts prior to upcoming concerts ? texts in promotional materials and descriptive texts in programme papers. The thesis is carried out from a critical discourse analytical perspective. The discourse analysis is focusing on finding the texts? messages and it asks the question: To whom are these texts addressed? Theoretical support is mainly taken from Foucault?s theory about the relation between power and knowledge.

This paper is finishing part of the two-year master programme in Industrial Engineering and Management.Initially there was an inquiry of studying the queue-times that Fläkt Woods uses when they break down internal working orders. These times were assumed to be too generalised and does not apply to the actual value of the queue-times which generates incorrect data and delivery delays. During the work of this paper it has been established that it is not the queue-times that is the biggest problem. The problem is the shop floor control and the lack of manufacturing the right products at the right time. Therefore an analysis of the production planning process was made to bring forward the real problems.

Title: The Relationship between Internationalization and Firm Performance Seminar date: 5 June, 2008 Course: Masters thesis in Business Administration, Programme for Managing People, Knowledge and Change, 15 University Credit Points (15 ECTS). Authors: Cheng Hsun Chiang and Márton Pap Advisor: Dan Kärreman Key words: Internationalization, Performance, Multinationality, Degree of Internationalization (DOI), Country of Origin Purpose: To illuminate various crucial aspects of internationalization by systematically contrasting the different models of the multinationality-performance relationship and searching for underlying reasons. Methodology: Meta-analysis on previous theoretical and empirical research. Our emphasis in this paper has been put on the qualitative aspects of the previous research unlike many other conventional meta-analyses that focus on the comparison of the empirical data. Theoretical perspectives: Five main models have been developed by earlier studies to describe the relationship between internationalization and performance: positive linear, no or ambiguous relation, inverted U-shaped, standard U-shaped and S-shaped curve.

This report is the result of a master thesis carried out by the author, student at the Royal Instituteof Technology(KTH). The task was performed as a product development process at a companycalled Ameibo AB, located in Stockholm. It is the final task of the studies at the Master'sprogramme Design and Product Realization. The report is structured in a chronological order anddescribes the methods used, the implementation of these methods and a presentation of theresults given from these studies.Ameibo is a company located in Stockholm, distributing films on the internet. The aim of thismaster thesis was to investigate the possibilities of entering the market for portable devices.

Internationella mätningar utförda av Programme for International Student Assessment (PISA) 2012, visar att svenska elevers matematikresultat, är betydligt lägre än genomsnittet. I skolan finns därför ett stort intresse att lyfta de sjunkande matematik-resultaten genom att exempelvis utveckla matematikundervisningen. Matematik-satsningen i skolorna har delvis handlat om att utveckla undervisningen genom att använda sig av utomhusmatematik (Orre 2009). Men vad innebär utomhusmatematik? Det övergripande syftet med denna uppsats är att synliggöra matematikdidaktiska antaganden i utomhusmatematik.

Då ett eventuellt förbud av nya kreosotimpregnerade stolpar kan bli en verklighet inom EU år 2018 letar Vattenfall efter andra alternativ. Stål, betong, limträ och komposit anses idag vara de mest konkurrenskraftiga alternativen och kommer att undersökas i denna rapport. Grundläggande tekniska egenskaper, miljöutsläpp och kostnader för de olika stolptyperna kommer att analyseras i rapporten och jämföras mot den kreosotimpregnerade furustolpen. Rapporten beskriver hur de olika stolpalternativen lämpar sig i Vattenfalls elnät i Sverige.P.g.a. sekretesskäl kommer exakta prisuppgifter inte att redovisas.

This Master?s thesis is one of two parts of a combined project called Sustainable development around the Lake Victoria, the purpose of which is to investigate the importance of local anchoring and active participation in the work towards sustainable development. The present study aims to investigate whether men and women are empowered by the participatory rural appraisal (PRA) process promoted in their villages by the VI Agroforestry Project Masaka/Rakai. The study is primarily based on interviews with farmers within the project area and brings up a local perspective on the concepts sustainable development, active participation and empowerment. The study shows that to improve the farmers? livelihood and to create a sustainable development in the community, the farmers have to be actively involved in, and in control of, the process.

3D-modelling in AutoCAD This thesis is done in cooperation with LB-Hus in Bromölla, and have aimed to establish a digital AutoCAD model of one of the company?s house types and to find out what opportunities there are to do visualisations in the form of images directly from the programme. Modeling has been carried out so that the very construction of the house is included. Interiors and installations, with the exception of the ventilation system, have been left out in the model. The model has been created with solid models after a comparative study made between solid models and surface models to find out which option in this case was the easiest to handle and took up the least space.

The constant need of energy is something that affects us all no matter our current situation. Whether we are driving our car to work, taking the elevator or using the oven to cook dinner we end up relying on energy. Our whole society is continuously striving to achieve a higher grade of efficiency and the process of supplying ourselves with energy is no exception. The importance of appliances in our everyday life cannot be exaggerated and thus the importance of their high efficiency.Efficiency is already a keyword in the appliance industry with labels, stars and numbers helping us choosing the most suitable option for the task ahead. No matter how efficient appliances often use pure electricity as their energy source.

Tidigare studier har visat att attityder till könsroller blivit alltmer egalitära (jämställda), men att attityder som rör föräldraskap och familjeliv fortfarande influeras av mer traditionella föreställningar, samt att män generellt har mindre egalitära attityder i jämförelse med kvinnor. Vidare visar tidigare forskning att attityders påverkansfaktorer i form av resurser kan ha olika inverkan beroende på kön. Syftet med denna uppsats var därför att undersöka vilka individspecifika faktorer, i form av resurser, som har ett samband med mer egalitära attityder till kvinnans roll i familjeliv och arbetsliv i Sverige, samt om dess inverkan har olika effekt för män och kvinnor i Sverige. Uppsatsens frågeställningar undersöktes med datamaterial från International Social Survey Programme: Family and Changing Gender Roles IV, Sweden, 2012, som innehåller enkätdata från cirka 2000 slumpmässigt utvalda individer i Sverige från 18 år och äldre, och analyserades med hjälp av linjära regressionsanalyser. Resultaten visar att män och kvinnor i Sverige överlag har egalitära attityder till kvinnans roll i arbetsliv och familjeliv, men att män i Sverige i genomsnitt har mindre egalitära attityder till kvinnans roll i arbetsliv och familjeliv i jämförelse med kvinnor. Vidare visar resultaten att kvinnor med resurser i form av högre utbildning och högre inkomst i genomsnitt har mer egalitära attityder i jämförelse med kvinnor med lägre utbildnings- och inkomstnivå.