This master thesis reviews advances in detection and diagnosis of static friction (stiction) in control valves. Control valves suffering from stiction results in oscillating control loops which in turn decreases both the process stability and reliability. Perstorp AB sees a necessity to automatically detect stiction in valves before the effects of the malfunctioning valves have become too severe. This thesis presents an introduction to maintenance, control loops and how stiction in valves can affect performance of control loops.A selection of methods presented in the literature are introduced and examined using normal operating data from the site in Perstorp. Common for all selected methods is their intuitive ideas and that they are based on normal operating data and minimum amount of process knowledge.

This thesis of 15 hp has been implemented at Halmstad University, in collaboration with Saab Dynamics in Linköping. Saab Dynamics is a company operating in the defence industry where competition is tough. This necessitates new ways to increase efficiency in the company, which is the basis for this thesis. Saab Dynamics wants to introduce simulation driven design. Since Saab Dynamics engineers have little experience of simulation, required a user methodology with clear guidelines.

This essay will cover the Swedish electoral system with a focus on the proportional representation andthe process involved from the conversion of votes to seats in the parliament. This process consists ofseveral methods which are created by political decisions as well as mathematical formulas and is notalways perfect in terms of equalization. An increment of six adjustment seats would have made thegeneral election of 2010 more proportioned. Despite this, the Swedish electoral system is wellconstructed and the essay will highlight areas which could be subject for improvement as well asexplaining fundamental concepts of the process..

The aim of this study has been to achieve an increased understanding of the meaning of home for people in homelessness. The study is based on texts written by people in homelessness and a qualitative content analysis has been used to process the material. The result has been analysed with an inductive approach, using parts of the analysis method grounded theory. Three aspects of the meaning of home was identified in the texts; control, self-determination and independence. The lack of a home means a major limitation concerning these aspects, according to the texts.

AbstractThe purpose of this study is to examine the process of resocialization for individuals who previously lived as criminals from an individual perspective. The research questions for the essay are: How do individuals in the study describe their process of resocialization? In which way does a support organization affect the process of resocialization for the individual? In which ways do the reactions from society affect the process of resocialization for the individual?To answer these research questions a qualitative method was chosen where six narrative interviews was conducted with men who previously lived as criminals but have been resocialized into society. These men are roughly between the ages of 30-60 years and are all members of a support organization for ex criminals.The results show that the process is divided in four stages and that the support organization has facilitated the process of resocialization of the respondents. Reactions from society both facilitates change using the help of different agencies can contribute, while negative reactions from other individuals makes change difficult.

The purpose of this study is to gain a better understanding of women who have been abused by their partners. The study also examines how violence takes shape in a relationship. Based on a qualitative text analysis of three autobiographies and one novel, we have obtained the material for this study. The three selected autobiographies are; "I have not told you everything" by Jessie Andersson, "The nightmare" by Maria Dahlén and "It would be a pleasure to kill you" by Magdalena Graaf and the novel "Hidden" by Liza Marklund. To gain a better understanding of this topic, we have used the following theories; the process of normalization of violence, gender and masculinity.

This report presents a thesis project conducted by two students at Mälardalens högskola. The project covers 15 points in industrial design and was conducted during April to June 2014. The principal of the thesis works at Plastic Produkter. The assignment was to develop equipment for an effective way to dose, mix silicon, fill a special designed plastic bag and then seal it. The bag is then formed into a breast model.When a customer for various reasons decides to do a breast augmentation or a breast reconstruction, there may be doubt or uncertainty about the result.

The dialysis ward at Karolinska University Hospital is a highly pressurized work environment filled with critical treatment situations where patient?s lives can be constantly in danger. Staff have to deal with a myriad of alarms and error codes in response to their patients varying ailments. The workforce at the dialysis ward lack controlled environment training, sufficient to address all of the potential treatment scenarios, with no risk of jeopardizing the patient?s condition.The purpose of this essay is to design and test the efficacy of using an IT based device for dialysis education at Karolinska University Hospital.The main topics this essay intends to address are:? Identification of user scenarios and training fields.? Prioritization of key training areas.? Utilization of IT in effective staff training.? Design of a conceptual prototype.The process focuses on the user and their needs.

There are problems with poor quality, poor scheduling and poor working climate in the Swedish construction industry. Many parts have been involved, trying to solve the problem.This spring a new planning and building-law becomes final. In this law, the requirements set on the controls are greater. Hopefully this will lead to fewer construction errors. The requirements set on the working environment have also increased, forcing consultants and contractors to focus on safe workplaces.For each project requiring a building permit, an inspection plan has to been drawn.

The present study examines power relations, textual genre and attitudes to the matching process in the labor market in the employment office?s opinion articles in the period 2009?2014.     The power relations that emerge in the debate articles between employers, job seekers and private employment constitute the study's main question.The theoretical starting points are taken from Fairclough?s critical discourse analysis (1992, 2001, and 2010), where the discursive practice consists of the employment office?s production of opinion articles during a recession. The social practice consists of the laws and regulations that make its actions to reduce unemployment in the society. The method is derived from Halliday?s (1994, 2002) systemic functional linguistics.

Wastewater contains biodegradable materials, which are often measured as BOD7.Trickling filters are sometimes used as a purification step for BOD-reduction. Atrickling filter is a tower, which is filled with a carrier material. Microorganisms growon the carrier material in the form of a biofilm. This biofilm consists mostly of bacteriathat purify water from BOD.In Älgarås? wastewater treatment plant the water is purified by a trickling filter.However the treatment plant has difficulties reaching the emission requirements forBOD.

This thesis describes a system for dealing with free surface fluid simulations, and the components needed in order to construct such a system. It builds upon recent research, but in a computer graphics context the amount of available literature is limited and difficult to implement. Because of this, the text aims at providing a solid foundation of the mathematics needed, at explaining in greater detail the steps needed to solve the problem, and lastly at improving some aspects of the animation process as it has been described in earlier works. The aim of the system itself is to provide visually plausible renditions of animated fluids in three dimensions in a manner that allows it to be usable in a visual effects production context. The novel features described include a generalized interaction layer providing greater control to artists, a new way of dealing with moving objects that interact with the fluid and a method for adding source and drain capabilities..

In this study, we aim to analyze how the terms documentation and pedagogical documentation respectively are portrayed in the curriculum (skolverket 2010) as well as in the curriculum complementary material (skolverket 2012). The analysis is performed by use of critical discourse analysis. We used published research as a theoretical base to analyze the empirical data against. Our aim is to increase the understanding of how the terms documentation and pedagogical documentation are used in the various policy documents and what messages these documents relay concerning the aforementioned terms.We aim to give some answers to the following questions:How to interpret the term documentation in relation to the term pedagogical documentation.How to interpret the ways the terms are promoted in the policy documents. We conclude that the term documentation is vastly more open to interpretation than the term pedagogical documentation. We note that the curriculum exclusively use the term documentation and stress the importance of using a variety of documentation forms.

The right usage of tacit and explicit knowledge is becoming increasingly important for businesses worldwide. This thesis searches the answer to how management consultants tackle the challenges originating from converting this type of knowledge into codified use. With the help of a case study analysis it was possible to gain special insight into the processes of knowledge collection, codification and re-usage at a major organization built upon knowledge utilization. In order to provide the reader with a wider picture, the main subject of the study has been analyzed from two perspectives: a practice based and an objective based perspective. Furthermore, two different types of knowledge, tacit and explicit have been differentiated and studied in relation to each other, to gain a better understanding of their origin and conversion process.

This essay concerns the issue of democracy and judicial review. The main focus is on the justification of both a positive and a negative attitude towards judicial review, and the values these justifications are based on. The analysis is made by textual analysis of four authors with different opinions of the subject matter: Robert Dahl and Jeremy Waldron who has a negative attitude towards judicial review, and Erwin Chemerinsky and Ronald Dworkin who are positive about it. In the analysis an analytic frame is used which consists of different dimensions and aspects of the problem of democracy and judicial review. The study shows that there are important differences in democratic values between a positive and a negative justification of judicial review.