When a helicopter is flying, the dynamics vary depending on, for example, speed and position. Hence, a time-invariant linear model cannot describe its properties under all flight conditions. It is therefore desirable to update the linear helicopter model continuously during the flight. In this thesis, two different recursive estimation methods are presented, LMS (Least Mean Square) and adaptation with a Kalman filter. The main purpose of the system estimation is to get a model which can be used for feedback control.

Background: In Sweden and Norway planned home birth is not included in the health care system. In Denmark women with expected low risk birth have the right to choose home birth. Registrations of home births in the Nordic countries are not completed and women?s experiences of planned home birth in Scandinavian context are not earlier described.Objective: The aim of this study was to describe women?s experiences of planned home birth in the Scandinavian countries.Design: Inductive content analysis. Fifty-three Scandinavian women who have experienced planned home birth have replied an open question in a questionnaire.

The purpose of this study has been to describe and analyze how former foster children experienced foster care which have been filled with maltreatment and neglect and how this has influenced their adult life when it comes to health, education and relationships. We also wanted to study how the former foster children coped with their placement. Furthermore we wanted to study whether there has been any turningpoints during their growth. Finally we wanted to describe how the former foster children experienced the authorities control. To make the purpose of this study complete we chose to use qualitative interviews with six former foster children as our research method.

The interest in the significance of public health for economic growth has increasedsteadily in recent years and a clarification of this connection may be of importance forthe status of public health. Aim: The aim of this literature based study is to describewhat previous research has shown in terms of the connection between public health andeconomic growth, focusing on high-income countries. Method: The study is based ontwelve scholarly articles retrieved from four scholarly databases. Result: The resultclarify that there is a positive long-term correlation between good public health andeconomic growth in high-income countries. Good health has a positive effect onproductivity, which leads to increased economic growth.

In this study it has been investigated what is missing in non-strength training women to begin exercise regular strength training. It has also examined the level of knowledge about the health benefits and the employer's encouragement to maintain good health. The study was designed in a qualitative methodology and data collection was designed in form of semi-structured interviews. Six women were interviewed between the ages 22-51år. The results showed that women possessed a very low level of knowledge about strength training and also fears and prejudices existed among them.

The overall aim with this study was to explore the understanding of how nursing staff - at a service flat in the county of Gävleborg, is related to the residents with intellectual disabilities, with regard to the residents' health. Five personal research interviews were conducted with nursing staff in a sheltered housing. The survey was based on a qualitative method with semi-structured interviews. Five nursing staff aged 27-57 were participated in this investigation. The analysis was conducted, by using a thematic approach.My overall findings show that Nursing staff have different roles to play depending on the situation in their relationship with the residents.

Background: Contracting asexually transmitted disease is strongly associated with stigmaand shame. Stigma associated with these diseases has a significant impact on self-image andpropensityto seek care. Despitehigh incidencethere is a generallack of awareness about therisks and theeffectsthatthese diseases have on both mental and physical health. Health carepersonnel are experiencing difficulties to meet and care for these patients. Aim: The aim ofthis studyisto describe patients'experiences of health care after they were diagnosed with asexually transmitted disease.

This thesis studies whether private equity owned firms within the Swedish welfare sector distinguish themselves in terms of tax planning and short-termism from a control group consisting of other privately owned welfare firms. For the first time, the comparison is made on the entire welfare sector, between 14 matched pairs within education, health care and elderly care. We use financial metrics associated with tax planning and short-termism in sign tests to examine whether the private equity owned firms differ from our control group. The financial metrics tested are actual and paid tax rates, level of interest, book-tax gap, investments, personnel expenses per employee, and cash earnings. We find that the private equity owned firms in terms of tax planning only differ in the level of interest, while no notable differences are found in terms of short-termism..

When traffic in large cities increases, it becomes more vulnerable to disturbances such as accidents, stalled vehicles or construction; therefore, traffic jams are more likely to occur. For better control of the traffic at a disturbance the Swedish National Road Administration (SNRA) has traffic equipment which can be controlled from a command centre. This traffic equipment consists of gates and signs with variable messages. This report will discuss the system used for traffic control in Stockholm. It will present proposals designed to improve it.

Folkhälsovetenskapligt program.

The purpose of the study is to investigate the possible effects of an unstable ventilation system and its influence on energy use and thermal comfort. The report also explores how qualified personal working with HVAC view and handles system control.In order to meet the requirements in energy efficiency and a comfortable indoor climate control regulation is a prerequisite. With optimized increased complexity of the climate systems, it becomes more challenging to control the system and the risk of unstable control increases. No previous studies about what affect an unstable system can have on energy use and thermal comfort have been found.The report is based on several tests were the controlling variable has been increased until the system becomes unstable. Two different types of unstable systems have been investigated.

The subject of this study was to research whether or not the effect of job insecurity on self reported health differs between good and bad times in the economic climate. Two different years of a national health survey from the Swedish institute of health (FHI) served as data, with 2007 representing good economic climate and 2009 doing the opposite. Both years consisted of data from a national health survey distributed to 20 000 random individuals in Sweden, where 2007 had 5738 valid cases and 2009 had 10 373. A quantitative method was used to determine the difference, consisting of a three variable cross tabulation with chi2-analysis as well as a model of binary logistic regression for each of the two years.The cross tabulation found a significant difference between the two years, with those reporting job insecurity having less of a chance to report bad health during the year representing bad economic climate. While the logistic regression showed the same tendency, the two years could not be significantly differed from each other in that part of the analyzes.With this in mind, the conclusion from the whole test was that no significant difference could be found between the years regarding the health effect of job insecurity..

The public health care sector has come under increasing pressure to cut down costs, maximize productivity and satisfy patients' needs during the 1990s and onwards. As a way of "getting more for less" quality management has been introduced. Originating in the private manufacturing industry, quality management has a strong focus on productivity and efficiency, aspects which are measured in quantitative terms. However, there are strong concerns that quality management is a means of speeding up the marketization of public health care by introducing core values much different from the ethic and medical norms that traditionally underpin health care organizations.This essay focuses on how quality management has been introduced to, and transformed by, public health care. A theoretical framework based on new institutionalism is constructed, and translation theories are used as a way of illustrating how the medical institutional environment, in fact, changes the concept of quality management.

The aim of this study has been to examine how people with the chronic disease diabetes are seek-ing information about their disease. The study also look at the sources, which are mainly used, and the information behavior of the participants in this study. Especially in diabetes health care the idea of empowerment is central, which means that the patients need a lot of information to get know-ledge and become empowered. The study also examine the public library as a resource of health information, and for that purpose an examination of the OPAC catalog in two public libraries has been done, using the word ?diabetes? to illustrate the literature and other medias related to di-abetes.

In this thesis, a computer program that in a simple way can calculate the performance of control loops at the refinery Preemraff Lysekil has been created. The computer program has been adapted to the environment at Preemraff Lysekil. Theories for evaluation has been studied in aspect of reliability and of automatic implementation. The evaluation has been carried out from data collected directly from control loops at the refinery and from simulated control loops with implemented errors. Among the studied methods are Harris index and Stattin´s oscillation index.