Safe operation of a large synchronous power system as Nordel is not an easy task.There are several aspects to take into consideration. This thesis focuses on the problems due to voltage collapses in a transmission system.The ability to foresee an upcoming collapse is vital to maintain stable operation of the grid. The grid operator at Svenska Kraftnät (SvK) uses the computer program SPICA to predict the maximum transfer limit at specified transfer sections. SPICA uses actual states from the grid to predict the transfer limitation, and a quarter later a renewed estimate is produced and so on. This means that the operator can se his transfer limits vary every fifteen minutes.Our task in this project is to validate the accuracy of the limitations obtained by SPICA.

The aim of this study was to investigate if behaviour, ear positions and cortisol in lamb which were given access to play followed the different phases of the reward cycle of anticipation, consumption and relaxation. The study was done on 8 Dorset and 12 Dorset x Fine Wool uncastrated male lambs with an average age of 10 weeks. The lambs were housed pairwise in litter pens (2 x 3 m). Pairs of lambs were taken to a play arena (5.9 x 5.5 m) three times a week during five weeks (first week for learning). They were then first kept in a holding pen where they could look into the play arena for 5 minutes and thereafter released for 20 minutes in the play arena which had a ball, two chains and a tunnel.

As part of an Agile developing team I have in my role as interaction designer also tried to evaluate the ?iPhone Human Interface Guidelines?. With action research I have taken actions to change the workflow and to see what there can be done to make the guidelines more motivating to use. Action 1 tried to make the iPhone components more available and it suceeded, action 2 tried to make the guideline more available in whole and did not work as it was designed to do. The guidelines did not work as a source of inspiriation and I and my fellow designer distanciated us from it.

The aim of this thesis project is to produce an algorithm for finding a topologicalrepresentation of a polygon, called a straight skeleton, using floating pointarithmetic. Various straight skeleton algorithms are examined and discussed witha focus on time complexity and one is chosen for implementation. This implementationis then compared with the open source library CGAL with regards torunning time. The result is an algorithm which is based on an algorithm by Felkeland Obdrzalek and which, for polygons with more than five thousand vertices andthree significant digits representing points, runs around 25% faster than CGALsimplementation. Complications regarding the use of floating-point arithmetic arealso discussed..

The Homogeneous Charge Compression Ignition (HCCI) engine is promising in terms of lowNOx, low particulates and high efficiency. Due to its homogeneous charge, where thecombustion starts almost simultaneously from a number of points in the combustion chamber,only lean mixtures are possible to burn because of the resulting rapid combustion, which is muchfaster than the combustion in an SI-engine or a diesel engine. When richer mixtures are used thecombustion will start earlier and also be more violent.To phase the combustion later and lower the combustion speed, external cooled EGR can beused. The EGR-system used in this thesis uses a divided exhaust channel where one channel andits corresponding valve are used only for transporting EGR back to the intake system.Consequently the EGR-valve is connected to the intake pressure. This system is called Direct-EGR (D-EGR).Engine tests verified that the CA50 indeed is phased later when cooled EGR is used.

The purpose of the house which is the basis of this report is to be able present itself on the market as a relatively cheap and at the same time a climate friendly choice. The house is supposed to be able to be built anywhere in Sweden and the rest of Scandinavia in a short period of time. This puts demand on what kind of heating system the house can have, since not all places have the geographic advantage of being able to use geothermal or district heating. Therefore the heating system choices will only include those that are not limited by their geographic location. The house will be built in modules which only require the groundwork to be done before the house can be erected. In this report "System solutions for plus or passive-housing" a comprehensive literature search has been conducted as well as a number of calculations.

The background of this research is that Swedish food products have hard to compete at the home market, depending on imported food products that increase more and more for every year that pass by. The ethic values LRF associate with Swedish food products, many customers have hard to put in relation with condition of foreign agriculture. Most customers today inquire high quality, safety and convenience in the food which they are eating. The source of their food seems to have less meaning. Many restaurants and bigger households appreciate Swedish food products and wants to buy them but price differences against foreign wares are to high. We have done oral interviews with wholesale dealers, restaurants, public purchasers and with different market organisations, there we have discussed buying strategies, the way they see the primary producer, the conscious of guests, choice and attitudes to Swedish and foreign products, distribution of power in the food market chain and to what position and suspension, they want the ranks of suppliers to have. The result shows the share of imported wares within restaurants and bigger households are at a high level and will continuing increasing. Within these sectors the final consumer in many cases put less effort in the origin of the raw source of food.

This bachelor thesis is written as a part of the geography program at Stockholm University, Sweden, and the study was conducted from April to June 2012.Tuberculosis (TB) is an airborne disease and one of the most widespread infectious diseases in the world with more than nine million new cases each year (SMI 2012, digital source). The disease is a major source of death and suffering in many places and the number of deaths remains high despite the availability of highly efficacious treatment. To control and prevent further spread of TB, the mapping of the disease spatial distribution is of essential importance.In this study, maps were produced that shows the spatial distribution of TB between the years 2002 to 2011 in the municipality of Stockholm. These maps allow an analysis of the spatial distribution at a local scale over time.The aim of this paper is to study how the spatial distribution of TB has looked like in the municipality of Stockholm the last 10 years and to analyze why the spatial distribution of the disease looked like it did. This study is based on the hypothesis ?drift?.

AbstractTitle: Art influences in today´s advertisingimages ? A qualitative study of advertisingimages and work of artNumber of pages: 46Author: Sanna OlssonTutor: Else NygrenCourse: Media and Communication Science CPeriod: Autumn 2009University: Division of Media and Communication, Uppsala UniversityPurpose: The purpose with this composition is to analyse how art has influenced todays advertising images, to see wich influences that can be descovered.Method/Material: Since this is an imageanalys the main material has been consisted of advertising images, a total of seven. In addition, art images have been used as comparative material. The advertising images have been strategically selected, however they are modern and aestetically appealing. A number of questions have been formulated wich is the basis of the analys.Main results: Primarily the study found that art has influenced today?s advertisingimages in different ways.

The most common way to treat wastewater in Sweden today is by a combination of an activated sludge process and a chemical treatment. These processes are not very energy efficient and may not be the most environmentally friendly. That is why it is interesting to evaluate new alternative methods to see if they can be less harmful to the environment and help to a lower resource consumption. New techniques are tested in a pilot installation at Hammarby Sjöstad, Sjöstadsverket. To be able to evaluate these techniques in a wide perspective system analyses are conducted where different impacts can be considered, advantages and disadvantages in the systems.Five system structures for water treatment have been constructed in Matlab/Simulink in this study.

The report contains a survey on telecommuting in nature and how concepts around that information could look like. The client for the project is Lars Sandberg, Dotank AB in Karlstad. The project is implemented in the course Bachelor of Science in Innovation and Design, MSCG22 of the faculty of health, science and technology at Karlstad University in the spring of 2014.Working flexibly and remotely in the so-called knowledge based professions is growing. That nature is an important source of recovery is a fact. The literature search in this report shows that there are factors that create both physical and psychological stress on most office workers while nature is a source of recovery and inspiration.

In the low-income countries of the world, rapid urbanization and decaying infrastructure results in an increasingly unsustainable situation when it comes to solid waste management. Often, the solution tends to focus on introducing technical advanced interventions based on the conditions of the high-income world. However, this thesis aims to ?nd site-speci?c solutions on solid waste management at a local scale. By taking in consideration of local conditions a customized approach is possible where the solution is not dependent on expensive structural changes.

Title: A hosting service for software development projects that use the Git revision control system. To learn using tools to make software development more effective should be self-evident at a high level institution as the competitive industry races on. The absence of directives for programming students in Sweden to use source code management (SCM) was the basis for this report. The report describing the developing of a hosting service for software development to use SCM of Git, which includes a web application, storage, API and authentication of students. The project resulted in a hosting service and a smaller survey of how the today Swedish students using habits of SCM during their studies..

Det är viktigt att se hälsa ur ett helhetsperspektiv där den sociala, fysiska samt psykiska hälsan ingår. Människan tillbringar en stor del av sitt liv på arbetsplatsen, det är därför en viktig arena att arbeta hälsofrämjande med. Hälsofrämjande sjukhus är ett exempel på en sådan arena. För hälsofrämjande sjukhus är det bland annat viktigt att främja den egna personalens hälsoutveckling i en positiv riktning, med hjälp av en aktiv kunskapsförmedling. På arbetsplatsen är det viktigt med nyckelpersoner som kan förmedla kunskap om hälsans villkor till övriga anställda.

A home for elderly is planed to be built at Zakrisdal, Karlstad, Sweden. The heat source for the building was at the time not determined. In order by the local government of Karlstad this report is meant to examine if the need of heat could be provided only by solar heat combined with a seasonal heat storage. The problem to solve is, if the need of heat from the home for elderly is provided from only solar heat, whitch dimensions of the solar collectors and the storage is needed?.