This master thesis has been performed at Vattenfall Power Consultant in Gothenburg and Trollhättan for Vattenfall Vattenkraft. In this report vacuum circuit breaker in small-scale hydropower stations with the rated power 4 MVA and below has been studied. Models of the stations are modeled and analyzed in PSCAD/EMTDC to study the high voltage transients that are created after current chopping with vacuum circuit breaker. Vacuum circuit breaker may chop the current before it reaches zero value, which means that high voltage transients can be created. The equipment of the stations can be destroyed by high voltage transients.The purpose of this thesis is to examine the use of vacuum circuit breaker in small-scale hydropower stations and the risk for high voltage transients from current chopping.According to the results there is a risk of high voltage transients after current chopping with small synchronous generators in stations with the operating voltages 0.4 kV and 3.6 kV.

This thesis analyzes how homonationalist and heteroactivist discourses are reproduced in the Sweden Democrats political communication between 2022 and 2025. Drawing on critical discourse analysis, the study examines a selection of key texts, including two Almedalen speeches by the party leader Jimmie ?kesson (2022, 2024), an extraction from a report produced by the party, and a parliamentary motion. The study is theoretically grounded in scholarship on homonationalism, heteroaktivism and populist radical right nationalism. It investigates how gender, sexuality and religion are discursively mobilized to define national belonging and construct boundaries between ?us? and ?the other?.

Protected Designation of Origin (PDO) is a quality control system created by the European Union (EU) to protect integrity of certain food and drinks that are produced in a specific area in a unique way. By protecting these products, the EU can certify that the traditional region-specific methods of food and drink production are preserved. The EU countries that follow such a system are mostly from Southern Europe. For instance in France, the PDO system has helped improve the income for farmers, boosted the rural development and assured protection for farmers against the abuse of their brand and the selling of their products by outsiders. In Sweden, there are no PDO products yet, instead there is Protected Geographical Indication (PGI) and Traditional Speciality Guarantee (TSG) that are not as protective as PDO.

Vid röjning av RSV-ammunition saknas idag adekvat beslutstöd för att dimensionera skadebegränsande åtgärder mot jetstrålens verkan. I uppsatsen vidareutvecklas en beräkningsmodell som författaren tidigare föreslagit. Syftet är att skapa ett verktyg som kan införas i ammunitionsröjningsverksamheten.Fullskaliga skjutförsök har genomförts för att klarlägga inverkan av förhållanden som är typiska vid ammunitionsröjning; en skyddskonstruktion byggd av sandsäckar och med ett långt detonationsavstånd till röjningsobjektet. Försöksresultatet visar att den grundläggande hydrodynamiska penetrationsteorin inte är användbar för dessa förhållanden. Vidare ger sandsäckskonstruktionen signifikant bättre skydd mot jetstrålen än en homogen grusbädd.Genom störningsanalys har känsligheten hos de enskilda parametrarna i beräkningsmodellen för verksamhetstypiska fel utretts.

Syftet med den här studien är att undersöka vad som skiljer i personlighet mellan studenter som vaccinerade sig mot svininfluensan och studenter som inte vaccinerade sig. Studien genomfördes genom en kvantitativ enkätundersökning på 194 studenter från ett universitet i Svealand. Deltagarna fick besvara psykometriska personlighetstester som mätte känslighet, ångest, depression, sympati och pålitlighet. Därefter utfördes statistiska test i SPSS för att i huvudsak beräkna medelvärdesskillnader.Resultaten visar att vaccinerade studenter är signifikant känsligare än ovaccinerade studenter. Vaccinerade studenter är också mer ångestfyllda men skillnaderna är inte signifikanta.

This essay concerns the notion of how immigration politics, defined as a political discursive structure that explains and justifies how and why the movement of people into a state's territory is restricted and controlled, has come to present its purpose not as solidarity with the 'immigrants' wanting to enter the state but as a protective measure for the state's citizens. By using discourse theory combined with theories from the International Relations field I attempt to explain why and how such a discourse positions 'immigrants' as a threat to the state.First, I concentrate on why an immigration politics discourse would position 'immigrants' as a threat. I argue that in order for people to construct their identity, the 'outside' what they "are not" has to be repressed. In the same way, the state has to dislocate the "outside" and create threats to uphold its supremacy. These boundaries are set to create a feeling of predictability and security, and ultimately they are a way of making peoples' "world" coherent.

The number of smartphones are constantly increasing, 2010 approximately 200 million unitswere sold globally and the figure is predicted to increase to 1 billion in 2016. The increased useof smartphones also carries many risks, for example many smartphones are connected to theInternet. This is a possible way for hackers to gain access to user devices. Smartphones are wellrepresented in research on its safety, while research on its use and users? awareness often leavesmore to be desired.

As the staffing agency business is rapidly growing and suffering from accidents resulting in higher sick leave than in other businesses, it is of great interest to analyze which responsibilities prevail between the customer companies and the staffing agencies, when it comes to working environment for hired staff.The purpose of this essay is to clarify the distribution of responsibilities between customer companies and staffing agencies, regarding working environment. I would also like to analyze which consequences this distribution of responsibilities may lead to.To be able to answer these questions, I have chosen to use the legal dogmatic method together with the sociology of law method. I have studied legal sources, literature and also interviewed three persons who are active within the staffing agency business; one person from the Swedish Work Environment Authority, one person from the employers? side and one person from the employees? side.The conclusion of my survey is that the SAM-responsibility is divided equally between staffing agencies and customer companies, since the customer company who hires staff is equated with an employer. The employer must also ensure that there is an organized work adaptation and rehabilitation function within the company.

The use of mobile devices has during the last years expanded and on the market you can see a huge amount of applications. The development of mobile applications differs from traditional systems development since mobility infers that mobile applications can be used in different technological and social contexts. Although previous research has recognized that mobility can present mobile application developers with certain challenges, empirical studies of how problems arise and how they can be handled has thus far been limited. In this study we focused on the requirements engineering process from a development view with the purpose of finding challenges emerging in the development process. The study is based on a qualitative case study that employed semi-structured interviews with both project managers and system developers active in the requirements process.

Andelen ungdomar som inte uppfattar några större risker med cannabisbruk har ökat de senaste åren. Ungdomarnas uppfattning av riskerna med cannabisbruk påverkar huruvida de kommer att välja att avstå från eller bruka drogen. Syftet med denna uppsats har varit att se vilka risk- och skyddsfaktorer som påverkar ungdomars riskperception avseende cannabisbruk. Frågeställningarna har varit hur föräldrarna, skolan och vännerna påverkar riskperceptionen. Uppsatsen utgår från en subjektiv syn på riskperception som innebär att inte en faktor ensamt kan förklara om ungdomarna har en låg eller hög riskperception.

A new FPGA suitable for space applications has just reached the market. To investigate whether there are any possible flaws or limitations similar to those previously seen on FPGAs, an evaluation has to be done. This master thesis contains the evaluation of this new radhard FPGA with focus on possible design limitations and package related electrical phenomena.Areas evaluated: Ground-/VDD bounce, Cross talk, Rise time sensitivit, Power cycling, Power consumption, Place and route tool, Radiation hardnessThis report contains all steps in the evaluation. From method to measurements, comparisons, theory, results and conclusions. In the evaluation work, special effort has been made to develop designs that really stress the FPGA to find potential problems.

AbstractAuthors: Carolina Magnusson and Johanna MagnussonTitle:  The balance between research and practice. A study of family therapist?s knowledge retrieval and the application of evidence-based practice.Supervisor: Jan Petersson Assessor: Peter HultgrenDuring our research we discovered that a very small amount of research had been conducted about the effect of the social services. It inspired us to fulfill this study. The aim of the study is to describe and analyze what knowledge family therapists in two Swedish municipalities use in family therapy work.

Purpose: The purpose is to examine more closely why the achievement of the environmental goals is so low. To within the thesis work to make this as interesting and with as good quality as possible, especially the environmental quality goal Reduced climate impact, but also Natural acidification and Protective ozone layer, has been chosen to be studied further. Method: A qualitative method and text analysis has been applied. Intervention theory, as Vedung 2009 describes, is used as an intellectual backbone and as a help to structure the essay. The three environmental quality goals correspond cases, or units of analysis. Analysis: The fulfillment of the respective environmental quality goals is analyzed according to its goal, policy instruments, implementation and its effects. To this some of the problems are analyzed that exist on the path to achieve the goals.

How a speaker can use their posture, gesture, facial expression and voice to create a strong ethos, pistis and sense of trustworthiness is, in this paper, associated with charisma (the power of leadership or authority).Verbal and nonverbal expressions from three particular speeches by Martin Luther King, John F Kennedy and Bill Clinton have been analyzed in depth. The results show that patos as well as strong nonverbal expression are factors in inspiring devotion or creating enthusiasm. Personal magnetism and radiance is also found to develop through figures of speech and rhetorical devices, including metaphors. Results show that facial expressions, pitch and other prosodic information are not always consciously taken in. Nevertheless, it is questioned whether such information can affect the ethos and pistis developed.

The purpose is to illustrate the phenomenon of self-harm from a social psychological and sociological perspective. The purpose is furthermore to examine the role social relationships play in the individuals´ self- imagine and what role does identification play for anyone who harm themselves? We want to examine in what way social relationships are important and how they function for individuals who harm themselves, both once they have started to harm themselves, and if the relationships in any part caused the cutting to begin with.Questions:How do individuals shape their identity based on self- harm? Which self-image do individuals have who self-harm? Is there anything in the person's previous social relationships that have caused them to begin to hurt themselves?Method:In this paper we have analyzed five autobiographies. We have used open coding from grounded theory as analytical method and subject positions based on discourse analysis.Theory:We have used the Cooley concepts looking glass self, Foucault's theory of power, Giddens' concept of ontological security and existential anxiety.Results and Analysis:We found six different categories that we thought were central. These were negative self-image, guilt, lack of family support, negative experiences of others' views, the protective identity as self- harmer and insecure social relationships in school.Conclusion:The self-harming is a very complex behavior.