In this master thesis a robot arm belonging to an automatic milking machine from DeLaval is investigated. The robot arm is controlled by a pneumatic cylinder and a valve. The goal of the master thesis is to investigate instability problems and to find out if it is possible to solve them by using gain scheduling. Gain scheduling is a type of controller where the parameters of the controller are changed during operation, for example depending on the working point. First a nonlinear mathematical model of the system was made.

Det här är en studie med syftet att ta reda på hur grävlingar reagerar på att vistas i fälla och om det kan påvisas att djuren upplever stress. Fällvistelserna har varit korta och långa, under dagtid samt nattetid. Grävlingarnas beteenden, hjärtfrekvens och kroppstemperatur har studerats. I materialet finns även en metod för insamling av underlag till stresshormon analys. Datainsamling har gjorts dels under vistelsen i fälla, men även under de närmast följande dygnen efteråt samt under en avslutande period av naturligt beteende.

The fashion market is highly dynamic, and characterized complexity, abstract phenomena and creativity. Further, differences between factors such as gender, countries and social classes pose increasing challenges to fashion companies and researchers active within this area. In light of these facts, the value of creating tools that help companies and professionals active within this industry becomes evident. Much research has been focused on creating a more thorough understanding of its underlying logics and its main drivers from a business perspective, whereas knowledge regarding fashion consumers and what drives their behavior are more limited. Through this study, insights about the Swedish fashion market and its consumers are generated.

The purpose of the study was, with initial position from two particular youth homes, to survey the staff?s experiences regarding different youth cultures that might occur at the institutions and how they react to them. The question formulations were as follows: What kind of youth cultures might occur at the institution and how are they being expressed, according to some of the staff members? How do the same staff members, individually, see their role and prospect to influence the type of youth culture that is developing on the institution? Earlier research in the field were used as theoretical starting positions as well as the concepts of ?looking-glass self?, ?the generalized other? and ?the overtaking of roles? in the symbolic-interactionism. Qualitative research interviews were carried through with three of the employees at the two youth homes and the results of the study evinced that both positive and negative youth cul-tures develops at both of the institutions, concluding the fact that youths affect each other both ways.

The Arctic region is rich in natural resources such as oil, gas, minerals and fish. Climate change causes the Arctic ice melt, making resource extraction possible as well as opening up new transport routes through the Northwest Passage and the Northeast Passage. This has led to competition and cross-border strife among the Arctic States. The two largest states in the Arctic are Russia and Canada, which are also members of the Arctic Council. Russia and Canada are at the moment involved in several disputes regarding the Arctic territory where the ownership of the North Pole is one example.

Suicidalitet, självskadebeteenden och psykisk ohälsa hos ungdomar är ett ökande problem. Antalet suicid i Sverige har minskat sedan 1980-talet. Men i åldersgruppen ungdomar 15-19 år har suicidantalen istället ökat markant. Suicidpreventiva åtgärdsprogram har införts för att på detta sätt försöka stoppa denna oroväckande utveckling. Syftet med detta fördjupningsarbete var att belysa ungdomars suicidalitet samt sjuksköterskans yrkesroll och förhållningssätt vid vårdandet av dessa ungdomar.

A power system will inevitably be subjected to transient overvoltages, most often produced by switching operations and lightning strikes. These transient overvoltages may harm sensitive equipment without sufficient protection, but it is not an easy task to predict what transients may occur or how they affect the system. A fault occurred in a low voltage system at Forsmark 2012 and overvoltages from lightning were concluded as the probable cause. The three aims with this thesis are to develop and test a model of the power system at Forsmark 3, analyse the transient behaviour of the system when subjected to lightning surges and identify critical parameters, and lastly to provide a tool for investigating the protection of the system. The modelling and simulations were performed in the freely available simulation program LT Spice.

The theme of this thesis is the professional ethics of public librarians. Qualitative interviews have been conducted with fourteen public librarians, with the aim to investigate their thoughts·and opinions concerning professional ethics and their experiences of ethical dilemmas in professional situations.The result shows that the majority of the librarians often discuss problems concerning what's right or wrong but that the discussions are conducted on the basis of practical situations and not in terms of professional ethics. The majority have vague ideas of how the term professional ethics should be applied on the work of public librarians, though all the interviewees consider the professional ethical discussion to be important.We examine the librarians opinions and experiences of ethical dilemmas conceming four subject areas: the principle of the librarian as a neutral and nonrestricting information intermediary, the principle of equal treatment of all the library visitors, difficulties. concerning media selection and the problems based upon the librarians flexibility towards the intemal rules of the library. The librarians experienced the behaviour towards the visitors as the greatest problem.

The globalization of today?s society has enabled consumers to acquire products and services from all over the world. Global organizations have the entire world as a playfield and offer products and services across markets. Regardless perception and transparency of the global market, consumers are still individuals. Consumers may have different perceptions and ideas about products, their functions and usage.

I denna uppsats undersöks ungdomars användning av gratis mobilapplikationer. Uppsatsen lyfter fram faktorer som påverkar applikationsanvändningen och förklarar hur faktorerna i jämförelse med varandra påverkar användningen. Genom detta nyanseras även skillnader mellan användningen av gratis-applikationer och betal-applikationer.En kvalitativ studie gjordes i form av två fokusgrupper där den åtskiljande faktorn var förvärvsinkomst. Deltagarna fick i grupper diskutera olika teman, till exempel pris, sociala påtryckningar och attityd kring användningen av mobilapplikationer. Resultatet av gruppintervjuerna tolkades och analyserades utifrån en tolkningsram baserad på företagsekonomiska teorier.

Sahlgrenska Academyat University of GothenburgDepartment of internal medicine and clinical nutritionAbstractTitle: Does omega-3 mitigate skin symptoms in psoriatic patients? ? A systematic review about the effects of supplementationAuthor: Anita Borgmästars and Sara LinderSupervisor: Mette AxelsenExaminer: Anna WinkvistProgramme: Dietician study programme, 180/240 ECTSType of paper: Examination paper, 15 hpDate: May 22, 2012Background: Psoriasis is an inflammatory skin disease with high prevalency. Its treatment is time-consuming and associated with many side effects. Therefore alternative forms of treatment, among them omega-3 supplementation, have been investigated. Omega-3 is a family of polyunsaturated fatty acids whose metabolites participate in the regulation of inflammatory reactions in tissues and may therefore have a positive effect on skin symptoms in patients with psoriasis.Objective: To determine if omega-3 supplementation has a beneficial effect on skin symptoms in psoriasis compared to omega-6 supplementation by rating the evidence quality in available studies.Search strategy: The literature search was conducted in the databases PubMed, Scopus and Amed.

The main purpose of this Masters thesis is to contribute to the understanding of high school teachers information seeking behaviour in the transition from university studies to occupational practice. The theoretical framework encompasses theories of professional socialization, the sociology of knowledge, of professions, and of library and information science. The empirical material has been collected through interviews with six recently qualified high school teachers in different subjects. The interviews have been analysed on two different levels; first on a descriptive level and then on a theoretical level. The major findings are that the academic context limited the student teachers information seeking and they did not have the opportunity to choose cognitive authorities on their own initiative.

Stillasittande framställs allt mer som en oberoende riskfaktor och är ett vanligt förekommande fenomen på arbetsplatsen. Detta är sammankopplat med en förhöjd risk för de stora folksjukdomarna, exempelvis hjärt- och kärlsjukdomar samt olika cancerformer. Syftet var att undersöka interventioner för att motverka långvarigt stillasittande på arbetsplatsen. Detta examensarbete är en litteraturstudie och tio stycken vetenskapliga artiklar inkluderades. Artiklarna hämtades från databaserna Pubmed och Cinahl, genom sökorden ?sedentary behavior?, ?sedentary behaviour?, ?sitting time? och ?workplace?.

Treatment is both about the actual encounter and how individuals interact as well as the behaviour among the counterparts. Previous research shows that a person?s experience of how he/she is being treated is formed by conditions created by external factors, in literature known as the general view on treatment. The purpose of the study is to show how people with a physical disability experience the treatment from their Social Security Agency administrators. We have compared the empirical material with theories on treatment and power and analysed how this affect the interaction between the administrator and the disabled person.

I det här arbetet presenteras en studie från ett projekt som ägde rum i Kolmården djurpark sommaren och hösten år 2003. Projektet bygger på ett uppdrag från jordbruksdepartementet. Det handlade om huruvida grävlingar i fångenskap reagerar i olika stressande situationer. För att kunna undersöka detta har grävlingarnas naturliga beteende studerats under fyra perioder från juni till september samma år. Det som studerats under perioden är grävlingarnas olika beteenden, lokationen i grävlingshägnet samt fysiologiska parametrar så som hjärtfrekvens och kroppstemperatur hos grävlingarna.