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.

This Masters thesis examines the position of films in Swedish public libraries. We have, by way of comparing various statistical data, determined that the status of film in public libraries is week. We have completed earlier research by mapping what genealogical, discursive patterns that could be outlined in the Swedish government reports from 1949 until today, focussing on the activity goals and media policy of the public library. We have, on the basis of Foucaults theories on genealogy and archaeology, where text documents are considered to be meta-descriptions giving each other authority, analyzed if there any discursive excluding or contextual formulations exist in the usage of the language concerning the goals and the media attitude of public libraries. We have mapped contextual discursive formulations that to the commissioners have become neutral starting points for their assumptions and conclusions.

This report is a result of a degree thesis at Luleå University of Technology together with Stram AB in Växjö. The project aimed to develop a size reducible bed, that gets small when folded and has a new slim design. The development of the new folding bed had the purpose to give Stram AB new ideas of how guest beds can look like and be used in the future. Information about Stram´s products and also information of other similar products on the market was gathered. A visit at a store, internet and interviews gave grater insight of the market, and of customer needs.

Syfte och frågeställningarSyftet i studien var tvådelat, dels avsågs att analysera vad orienteringslitteraturen skriver om träning, dels att jämföra hur svenska elitorienterare tränade på 1980-talet och år 2010.Frågeställningar till källanalysen: Vad skriver orienteringslitteraturen om träningsupplägg, mental träning och mentala faktorer som påverkar prestationen samt tränarrollen?Frågeställningar kring hur elitorienterare tränade på 1980-talet jämfört med år 2010: Vilka skillnader och likheter i träningsupplägg bland kvinnor och män finns det mellan 1980-talet och år 2010? Har tränarrollen förändrats? Varifrån får elitorienterare sin kunskap om hur de ska lägga upp sin träning?MetodDe metoder som användes i studien var källanalys och enkätundersökning. De källor som analyserats är fem böcker som handlar om orienteringsträning. Respondenterna till enkäten var de som var landslagsaktiva under 1980-talet samt de som var det år 2010. Antalet respondenter var 13 från 1980-talet och 14 från år 2010.ResultatDe viktigaste resultaten i studien var att det finns både skillnader och likheter i vad som ingår i en elitorienterares träningsupplägg på 1980-talet jämfört med år 2010.

Genom åren har intresset för och satsningar på underhållning i tredimensionellt format (3D) gått i vågor. Idag har de flesta biografer stöd för att visa 3D-filmer. Utöver detta intresse har det på senare år även börjat komma mer teknik för 3D i hemmet. Det har också introducerats många nya mer immersiva och intuitiva inmatnings-enheter som bidrar till under-hållning med element av virtual reality hemma. Företagen Sony, Nintendo och Microsoft har alla lanserat olika typer av avancerade tekniker för sådana inmatnings-enheter till sina spel-system.

The subject of this paper is the mediation of norms about sexuality, from personnel working at the Swedish ?ungdomsmottagning? (youth centre for service and counselling about sexual health), to the visiting teenagers. The purpose of the empirical study is to investigate how the staff understands the part of their work that implies giving advice about sexuality; how they work, which norms they have about youth sexuality and how they see their roll as advisers. To answer these questions, I have interviewed six staff members working at different youth centres. Three of them work as social counsellors and three as midwifes.The main area of work at the centre consists of individual appointments, but another important task is meeting with school classes visiting for purposes of study.

Background: Sleep-disturbances in persons with Alzheimer´s disease are prevalent. They are characterized as increased frequency and duration of awakenings, decreased slow-wave sleep, REM-sleep and increase of day-time napping. Depression and lower quality of life are associated with sleep-disturbances. Altogether a significant source of stress for caregivers and an important factor in institutionalization. Non-pharmacological treatment alternatives are rare.Method: Single-case A-B-C design, with non-concurrent multiple baselines, a pilotstudy.Aim: To explore if an educational program on sleep, sleep disturbances and behavioural change directed towards caregivers improved sleep, depression and quality of life in persons with Alzheimer´s disease living at home.

The purpose of this master thesis is to implement and validate a Power System Stabilizer (PSS) to a generator at Trängslet hydropower station in Dalarna, Sweden. Problems with local rotor oscillations can occur at the hydropower station when power is transferred on a new power line (130 kV) from Northern to Southern part of Dalarna. To ensure good operation properties on this power line Fortum Generation AB and Fortum Distribution AB wants to activate a PSS on a generator.There have been investigations in which situations and what equipment that contributes to rotor oscillations. When this is known the PSS is tuned to damp these oscillations by choosing a good set of parameters. The most important parameters for good performance are to choose amount of gain and phase compensation.

This study has been assigned by Bengt Hellman who works at the logistic department at IKEA Torsvik just outside of Jönköping. The task has been to develop a new picking strategy for the Oversize area in the CDC-Warehouse. The reason why IKEA wants a new strategy is because they want to minimize the route length for the forklifts when collecting the orders.By evaluating the current strategies on other areas in the CDC-storehouse, study literature within this subject and look at restrictions for the storing of goods, we have analyzed how the Oversize area works today. We compared the gathered information, to how it should be done according to the literature to be able to work out a new functional strategy.Today, IKEA does not have a working strategy for the oversize area because of lack of time and because all the power has been put on other areas were sales rates are currently higher. This have led to lack of organisation at the Oversize area and items are just put were there is space without first analysing were it should be placed.The strategy that we have worked out and introduced to IKEA builds on easiness of understanding the layout, the employees shall know why an item is placed where it is.

In this work, I have studied whether if one can detect AD / HD in preschool. I have read some literature and searched on the Internet. I have also tried to get to interview people who are familiar with this topic, which has not been easy. I have questioned 13 persons if they would participate in an interview, but most have refused because they do not have time. I succeeded anyhow to get three persons, two special educators and a nurse on the BVC.

Den 31 mars 2006 genomförde jag min examenskonsert ackompanjerad av Spårvägen Malmö. Efteråt började jag fundera på om orkestern fick ut lika mycket av själva konserten och förarbetet som jag. För att ta reda på detta genomförde jag en enkätundersökning med orkestern samt intervjuer med utvalda musikanter. Arbetet tar upp relationen mellan amatörer och professionella och hur man väljer repertoar i en amatörorkester. I resultatkapitlet redovisar jag enkäten och intervjuerna.

This Master of Science thesis project handles issues around managing data from the digital tachographsystem. European legislation states that companies must download the data of the digital tachograph systemand store it for at least one year for control purposes. The system stores data on the vehicle unit located inthe driving compartment and on smart cards personal for each driver.Acquiring data from the previous analogue tachograph was done instantaneously since the data wasphysically printed to a circular paper chart when driving. To acquire data from the digital system one mustperform a download from the vehicle unit and later transfer it to some form of backup solution for longterm storage. Data must also be downloaded from the driver smart cards.Download of data from the vehicle unit is the most time consuming task and may take up to 30minutes pervehicle.

Lundbergs Plåt AB is a small company situated in Jönköping. Their main task is to process different kinds of steel such as stainless steel. Lately, they have shown an interest in Lean production.On the basis of the situation mentioned above, we developed the purpose to find and decrease the non value-added wastes in the production at Lundbergs Plåt AB. Out of this, we also developed and answered two questions: Which wastes can be found with help from a value stream mapping (VSM)? In what way can these wastes be reduced and how can these reductions contribute to an improved production? VSM is the method used to find the non value-added wastes.

This report shows the process of the development of a sensor module for the seed drills of Väderstad Verken AB. The module is supposed to replace existing solutions, provided that it is better from both a constructional- and an economical aspect. The purpose of the sensor is to continuously give the driver information about the level of height of the front- and drilling tools and the main purpose of the sensor is to allow the seeds to be placed at the desired depth. The sensors which have been taken into consideration have all been of an analogue type and have a protection class of minimum IP67.The methods applied have been taken from the book ?The Mechanical Design Process? by David G.

Idag finns det enligt Statistiska Centralbyrån omkring 165 000 personer som är synnedsatta, varav cirka 23 000 är gravt synnedsatta och blinda. Dock tyder den demografiska utvecklingen på en kraftigt ökad livslängd och därmed kan dessa siffror väntas öka, då synnedsättning är en av de funktionsnedsättningar som blir vanligare och vanligare hos äldre. Genom landats syncentraler tränas orienteringsnedsatta i hur de skall kunna orientera sig i trafiken med hjälp av bland annat utformningar i gatumiljön som informationsindikatorer. Teknikkäppen är ett hjälpmedel för att kunna ta in denna taktila information och identifiera hinder. Många av de personer som har synnedsättning eller blindhet använder sig av den information som bildar såkallade ledstråk.