Voltage sag indices are a way of quantifying the performance of the power supply, as far as voltage sags are concerned. Indices can be defined for individual events, for individual sites, and for a whole system. A standard method for single-event methods is part of IEC standard 61000-4-30.This thesis emphasizes the importance of voltage sag indices and different methods for calculating three-phase voltage sag characteristics. Three-phase events measured in a medium network voltage over period of one month were analyzed, results examined and statistically evaluated. An algorithm for calculating voltage sag characteristics and indices was created in Matlab.

On the 8th of May 2007 a local power-sharing goverment consisting of Sinn Fein and the Democratic Unionist Party (DUP) was formed in Northern Ireland. The aim of this dissertation is to explore why the DUP, who in the past have opposed all forms of power-sharing decided to form a goverment and take active part in a power-sharing agreement. The study is based on a consociational theoretical framework developed by Arend Lijphart and further developed in a Northern Irish context by John McGarry and Brendan O'Leary. Using this theory the study seeks to understand the broad conditions surrounding the DUP's power-sharing. After a description of consociational theory and the road leading up to the Belfast Agreement,three possible explanations for power-sharing, based onconsociational theory are discussed.

The aim of the study has been to find out children?s librarians? views on and management of media that contains topics with a controversial nature and also to find out how this affects the public library as a democratic institution. We have conducted the study by interviewing six children?s librarians. By using Vestheim?s terms value rationality and instrumental rationality, we have been categorizing the answers from our informants and thus identified two different points of view.

The main purpose of this study is to investigate and understand how technology students handle information especially when they are working with their Masters thesis. A further purpose is to examine how technology students use library resources of the Linköping University. The research method used is grounded theory, where description of the method is an integral part of the study. Twelve qualitative interviews were made with newly qualified graduates from the engineering programs of Linköping Institute of Technology. The respondents were divided into two groups, A and B, with six in each group.

This essay set out to propose a problematic interpretation of the socio-cultural perspective on learning. Its purpose is to show how the socio-cultural perspective on learning defines the concept of knowledge in an incomplete way. The aim becomes then that of giving a more comprehensive description of this concept, and, to this end, to construct a new, broader pedagogic discourse. The investigation starts with a deconstructive analysis of Roger Säljö?s socio-cultural text in order to point out the incompleteness of the concept of knowledge.

ABSTRACT Our main objective with this essay is to provide a description of old people?s stories about aging. The essay is based on the empirical source of four qualitative interviews with older people over the age of eighty years young. The main goal is to inquire answers about; their time in the workforce; retirements; healthissues; media/advertisements; adolescence/youthfulness and attitudes. The following main questions have been dealt with: What do the elderly emphasize when they describe ageing? Are healthissues the prime subjects the elderly talk about? Do the elderly experience positive or negative attitudes towards ageing? What is their point of view of younger generations? In what way do they describe their years as workers? In what way do they describe aspects about their retirement? We reserved to consider the opinion of their own, to be the most valuable source in our study.

The purpose of this investigation is to study how librarians experience bookcrossing. We focused on the two following questions: Which variations are there in librarians conceptions of bookcrossing as literature exchange and reading support activity? Which variations are there in librarians conceptions of bookcrossing compared to other methods of literature exchange and reading support? Bookcrossing is an international book club where you share your books by leaving them at public places. The thesis is focused on librarians? conceptions and not the conceptions of members of bookcrossing.

Background: Since the end of the 1990`s the self-harm among adolescents have increased. Research is needed on how to improve the ability to care for these patients. That is why it is important to investigate how patients who self-harm and the next of kin are encountered by the caregivers.Aim: The aim of this study was to illuminate the experiences of encounters with caregivers at self-harm.Method: The study was based on narratives, which in this case means analysis of autobiographies. Five autobiographies were analyzed in accordance with a description by Dahlborg-Lyckhage. Four of these were written by self-harmers and one by a next of kin.Results: Three themes and twelve subthemes emerged which describe both negative and positive experiences of encounters with caregivers.

The aim of this Bachelor´s thesis is to contribute to theunderstanding of the headmaster´s view of his role when it comes to developing the school library and in particular the work of integrating the library into the teaching. The basis is three questions: What views do the headmasters express regarding the libraries´ main functions? What views do the headmasters express regarding their own importance for the school libraries´ pedagogical role? How do the headmasters regard the interaction between teachers and librarians, as to how the interaction works? To get answers to these questions we conducted semi-structured interviews with headmasters of secondary schools. As a theoretical starting point, we used our own taxonomy for headmasters. The basis of our taxonomy are from the points by the ?Svenska biblioteksföreningen? and ?Kungliga biblioteket?, which together form a description of a school library integrated in the school curricula.

The aim of this essay is to analyze the relationship between the title and the music in a selec-tion of piano pieces by Torsten Petre. Based on the work list, a categorization of the piano titles has been made and the categories have been named ?emotions, moods and minds?, ?na-ture?, ?mankind?, ?dances and similar titles?, ?supernatural beings, fairy creatures and popu-lar belief?, ?foreign countries and foreign culture?, ?nationalism and tradition?, ?artifacts?, and ?miscellaneous?. Two pieces from the category ?emotions, moods and minds? Skizzer för piano, third series Op.

There is little doubt that the digital technology has played a major role in reshaping the ways in which we experience the world. In a few decades the Internet has become a vast repository for knowledge and ideas. New arenas where people may meet and fraternize have emerged, and with the help of various digital tools and websites, the production of new material has increased to an almost unfathomable level.But all is not well on the digital front. As the Internet has become a crucial part of our everyday life, certain skills in handling digital media has become very important to master. A well-developed ability to navigate through this ocean of information is needed, and knowledge in managing the risky nature of the internet is critical.

Research in solar energy is taking big steps in both solar heating and solar electricity. It´s not only the technologies alone, but also the combination of both solar electricity and solar heating which is what is called a solar hybrid. The idea of a solar hybrid is that a solar cells efficiency decrease with increased temperature and can with help from a solar collector be cooled and the heat can be utilized. This thesis report compares heat production and electricity production with respect of, in first hand, a solar hybrids geometry in the cooler. The theory chapter describes solar heating and how different solar cell technologies work and their environmental impact at the production and how compatible these technologies are for the solar hybrid.

This report describes the development and implementation of a system for transmitting digital information at high speeds from a miniaturized submersible developed by the Ångström Space Technology Centre at Uppsala University. For instance, the vehicle shall transmit image data ? even stream live video - through an optical fibre to a monitor in a ground station. Hence, the system shall be used both to convert the image data to make it transmittable, and to recreate it at the receiver.The work includes a pre-study of the programming language and the technology used. A concept for the solution is presented together with main components later broken down into internal functions.

TPB, The Swedish Library of Talking Books and Braille, has requested a study to investigate the organization and content of a possible future Swedish web portal for users with reading disabilities. The aim of this thesis is to conduct such a study, with an emphasis on knowledge organization. The main aspects studied are formal description, representation, search and retrieval, document retrieval, and additionally also aspects related to content. The following questions are answered in this thesis: - How are web portals, online databases and Internet libraries for users with reading disabilities constructed, from an organization of knowledge point of view? - How can these solutions for knowledge organization be incorporated into a possible Swedish web portal? - With regards to content, which additional aspects are present in the studied web portals, online databases and Internet libraries? The questions are addressed through a detailed study of ten web portals, online databases and Internet libraries from Nordic and Anglo-American parts of the world.

The purpose of this study was to investigate the relationship between locus of control and behavior in a work group. The investigation was performed using two methods, self-report and observation, which were used in order to provide a description of how the individuals experienced their own behavior in a group context as well as of how they actually could be observed to behave. The 31 participants were divided into five groups. During the procedure each group received a task, which was to be discussed and solved by the group members together. Observations were carried out using IPA.