This master thesis deals with problems in the arc length control in Pulsed MIG/MAG Welding. The main problem is that it is not possible to measure the arc length. In the present solution the voltage over both the electrode and the arc represents the arc length. To improve the arc length control a model of the electrode melting has been built. One output from the model is the voltage over the electrode and with this voltage together with the measured voltage it is possible to calculate the voltage over just the arc.

Background: Since the start of the twenty-first century it has become very important for companies to act in a responsible manner, in guides of CSR. The idea is that companies have more responsibilities than to achieve a higher profit for their shareholders. They should also care about the society and act in a responsible way.Problem discussion: Problems concerning CSR are that the internal part of the sustainability work has not encountered the same level as the external part of the sustainability work. Companies are today struggling with implementing CSR into their business strategies.Research questions:1. What does a company has to consider when working with CSR? 2. How can management control systems help the implementation of CSR into the organisation?Purpose: The purpose of this thesis is to examine what a company has to consider when working with CSR and how management control systems can help the implementation of CSR into the organisation.

Status handlar om en persons position i en hierarki inom en viss grupp. Det är inte en egenskap utan något som uppstår i relationen mellan människor. Syftet med denna studie var att kartlägga eventuella skillnader vad gäller hur människor attribuerar kvinnors och mäns statusbeteende. Med hjälp av en egenframtagen enkät samlades data in från 57 studenter vid Psykologiska institutionen, Stockholms universitet. Data analyserades med hjälp av en variansanalys.

Introduction: Each year 1200-1300 patients are diagnosed with head neck cancer. Treatment that involves radiotherapy can cause severe side effects for example trismus that affects quality of life.Purpose: To study health-related quality of life in patients who have undergone radiation treatment for head and neck cancer and participated in a intervention group who received training intended to prevent trismus or in a control group who received standard treatment.Method: This is a prospective study in which data is collected from 66 patients participating in a randomized study aiming to evaluate a training program to prevent trismus. Thirty three participated in the intervention group and thirty three in the control group. Both patient groups assessed health related quality of life (HRQOL) with EORTC QLQ C30 and QLQ-H&N35, at start and end of the radiation treatment, and at 3 and 6-months after completing radiation treatment.Results: There is no difference between the intervention and control groups regarding symptoms, functional status and global health, except for intake of nutritional supplements.  For both groups almost all scales measuring HRQOL deteriorated under the radiation treatment. However, 3 and 6 months after end of radiotherapy HRQOL had improved and had returned to the baseline values.

Hur påverkas de som får behålla sin anställning vid en personalneddragning, downsizing? Ser de sig som vinnare och bildar ett högmotiverat team som med entusiasm går in för att säkra organisationens överlevnad, eller är det istället tvärtom, att de som blir kvar påverkas så negativt att de förlorar sin organisationscommitment och börjar fundera på att söka sig ifrån organisationen? Den tidiga forskningen ägnades åt dem som fick lämna sin anställning vid en downsizing. Under de senaste decennierna har intresset även riktats mot dem som överlever d.v.s. de som får behålla sin anställning vid en downsizing. Forskningen har identifierat ett antal faktorer som kan sättas i samband med effekterna av en downsizing.

The purpose of this study was to examine health promotion and ill-health prevention in the workplaces of the City District Committees in the City of Malmö. More specifically, we wanted to find what types of health problems there were and what kinds of strategies were applied to prevent them. Furthermore, the aim was to examine whether the leaders of the City of Malmö saw any effects of the strategies in use and if so, which. Finally, the intention was to compare our empirical results to previous research in the field of health promotion and ill-health prevention in workplaces. We conducted a qualitative study consisting of semi-structured interviews with five leaders in different levels, two personnel secretaries, two employees assigned to improve the health of the personnel in the City Districts, and one safety representative.

The aim of this study was to categorize and analyze articles in health magazines, how health messages about health is being described. Using a qualitative content analysis the researcher answered the aim by three research questions: What kind of health messages about health factors do the magazines describe? Do the health magazines talk about risk factors for unhealthy behavior? What kind of commercial messages do the magazines provide? The result from the content analysis showed that health magazines presented social support, self-esteem, acceptance, equality and strategies as health factors. They tried to change readers? perceptions to get a healthy lifestyle.

The aim of this qualitative study was to give an deeper understanding of how employees in the engineering industry experienced health education and how they understood and gave meaning to the terms health and health education. The study was based on interviews with eight men and women who participated in a health education project which had been held on their workplace. When the study took place the interviewees were in the age between 28 and 58 years. The results indicate that the employees understood health as a combination of both physical and psychological factors. The positive aspects described by the interviewees based on their experiences from the project were increase physical activities and that the project had helped them to get a better diet.

The purpose of this thesis is to achieve a greater understanding of how the social workers at the family unit in one of Stockholm municipalities comprehend the work environment at the workplace. Our aim is also to find out how the work environment can affect the health of the social workers in the form of their wellbeing and comfort at the workplace. In order to answer our purpose we conducted interviews of all social workers at the family unit in one of Stockholm municipalities that describe how they experience the work-environment in the workplace and how it influences their health.  We have analyzed the interview material in a thematic analysis based on three theoretical perspectives; SOC, claim ? control - support and Human relations. We have also coupled the interview material to the background chapter in this thesis that describes how a good working environment should be structured.  The chosen method characterizes an abductive process.

Aim and Problem statement The study aimed to investigate views on physical health amongst patients in methadone maintenance program, which is a subject little explored. Previous studies suggest that methadone patients are at risk developing illnesses related to the metabolic syndrome and an unhealthy lifestyle. Methadone also has side effects such as weight gain and irregular levels of glucose. Method This qualitive study included seven interviews with patients in the methadone maintenance program in Uppsala. Qualitive content analyses were performed Findings Content anlyses gave the theme: The view on physical health is a stuggle after normality were ambivalence of lifestyle changes and alienation causes instability in helath.

The purpose of this thesis is to find means of control that secure cost efficiency regarding the accommodation for the employees on missions abroad of the Swedish Ministry for Foreign Affairs. Today the ministry?s cost for the employees? rented housing is 100 million SEK and there is a need of improvement in the control of these costs. A work method for organizational development will be used in order to reach the findings presented in the thesis. First we study the strengths and weaknesses in today?s control system.

The aim of this study was to examine the relationship between gender and self reported symptoms (physiological and psychological) and sense of coherence (SOC) and Job Demand-Control-Social support (JDCS). The sample consisted of 360 respondents (nfemale= 261, nmale= 99), in the ages between 19-53 (M=25,57, SD=5,77), all students from Växjö University. A quantitative work method was used in the study; data was collected using questionnaires that consisted of self-reported questions, based on three parts: A modified symptom checklist, SOC 13 and a modified JDCS questionnaire. The result of our study showed that both SOC and JDCS had an effect on self-reported symptoms but there were no interaction between SOC and JDCS. No significant gender differences were found regarding the level of SOC.

The aim of this qualitative study was to study high school PE teachers´ experience of health in high school and how they work with health in their physical education. This was examined by interviewing five high PE school teachers. The results show that all teachers were in the category humanistic approach. They saw health as more than only absence of sickness. The methods for using health in their physical education were divided into three different categories; physical health, improve the individual and theoretical health.

The task in this thesis is the steering of one of Saab Bofors Dynamics robots using Sliding Mode Control, a method they never used before. The robot constitutes a system which in addition to perturbations and uncertainties due to modeling imprecision, hold the difficulty of being highly time variant. In order to be able to keep required performance with uncertainties and modeling imprecision present, the use of robust control methods like Sliding Mode Control is necessary. SMC is based on the states of the system being forced to stay on or in the direct vicinity of a hyper plane in the state space which is chosen in a way that gives the system dynamics desired properties. Other advantages with sliding mode are reduced order dynamics on the switching surface and total insensitivity to some uncertainties and perturbations.

The use of temporary workers gives companies the opportunity to be flexible, by avoiding hiring and dismissing workers because of economic conditions and trends in demand. The management control in use at the company has the purpose of influencing employees? behaviour to act in the company?s best interest and towards its goals. The management control should also influence the behaviour of the temporary worker. The companies have to create motivation and commitment among the temporary workers although they are employed by a staffing agency.