Wireless sensor networks have the potential for becoming a huge market. Ericsson predicts 50 billion devices interconnected to the Internet by the year 2020. Before that, the devices must be made to be able to withstand years of usage without having to change power source as that would be too costly. These devices are typically small, inexpensive and severally resource constrained. Communication is mainly wireless, and the wireless transceiver on the node is typically the most power hungry component.

Jämtkraft AB which is a power production company in Sweden has bought two newhydro power units to their station in Hissmofors. The two new generators are using aconcept with sliding stator feet to handle the thermal expansion.The concept with sliding stator feet on hydro electric generators has not beenworking satisfactory on many hydro power stations in Sweden and has caused a lot ofcosts due to long downtimes.The new station in Hissmofors is very important for Jämtkraft AB, and therefore theywant to know how to make sure that the sliding stator feet are working as theyshould. According to theories and a simplified model of the generator the stator feetdisplacement should be around 1 -1,6 mm.The generators are delivered with a surveillance system that will measure thedisplacement of the sliding stator feet. The signal from the system isn?t accessible forJämtkraft AB but it will alarm when the sliding stator feet are malfunctioning.To secure the function of the sliding feet a logger for the surveillance system or adifferent measurement system must be used; if both systems are used Jämtkraft cansecure the function of the surveillance system..

The purpose of this essay is to study causes for the lack of political trust in Europe and especially in Sweden. The essay starts with a presentation of two theories about the reasons for low political trust. Robert D. Putnam among others presents a theory that gives social capital an important role when viewing the low political trust. As Putnam sees it a person that participates in any kind of organization, political or not, develop trust for other human beings that in the long run affects political trust.

Under 1990-talet kom Kaplan och Norton fram med styrningsfilosofin balanserat styrkort som innebär att managers uppmanas att inte enbart ta hänsyn till finansiella mått utan bör använda sig av både finansiella och icke-finansiella mått för att kunna styra företag. Det här konceptet med balanserat styrkort har sedan det togs fram utvecklas och i början av 2000-talet finns den tredje versionen av balanserat styrkort som tillsammans med avancerad teknologi bildar konceptet business performance management. Det innebär att den information som ligger till grund för de rapporter som består av finansiella och icke-finansiella mått hämtas från en central databas i det verksamhetsöverskridande business performance management systemet. En anledning till det är att business performance management knyter samman balanserat styrkort med avancerad teknologi som möjliggör att managers därmed har möjlighet att få tillgång till en gemensam version av verkligheten, det vill säga en gemensam mental bild hur företaget presterar. Dessutom möjliggör den avancerade teknologin att managers oavsett om beslut tas som är strategiska, taktiska eller operativa att de har tillgång till den information som beslutsunderlagen baseras på i rätt tid.Den information som beslutsunderlagen baseras på måste bestå av en tillfredställande god kvalitet för att möjliggöra att managers tar korrekta och optimala beslut.

The purpose with this report is to examine how the implemented energy efficiency measures on Bokelundskolan in Växjö have had impact on the energy use. The measures which have been implemented are, new ventilation system, new heating system, optimized adjustment of the heating system, new windows with U-value 1.2 and lower window height, insulation under windows and in the crawl space. The school's energy use before and after rebuilding has been calculated with the calculation program, Vip-Energy 1.5.5.Calculations of energy use for the school with windows on U-value, 0.9 and 0.7 have also been done. The replacement of windows has been studied from a cost perspective. The conclusion is that the exchange of heat and ventilation system was the biggest contributor to reduced energy use on Bokelundskolan.

We have performed a case study on Acne Jeans, a creative Swedish fashion company, which initiated a cooperation with the Swedish venture capital firm Öresund. The aim of our paper was to examine what motivates a venture capital firm to transform the management control system of a creative company, into a more formal system of control. Main results: Öresund did not have an excessive impact on the management control system of Acne Jeans, due to three main reasons. First of all, Acne Jeans had a satisfactory management control system prior to the cooperation. Furthermore, the relationship between the two parties was characterized by mutual trust.

Electromyography (EMG) is a technique that measures muscle activity, whichmeans detecting the electrical signals that travel through the muscle in connectionwith muscle contraction. This project deals with how EMG can be used tocontrol a computer game.The project is centered around the game 'EMG Track Game' which has beenconstructed as part of this work. 'EMG Track Game' is controlled by twoelectrodes fastened on the player. These are attached to two selected musclesand control the motion in one direction each, one up and the other one down.The game is constructed in the purpose of being used in several elds of application.Among these are as entertainment, training equipment and a tool inresearch related to EMG and muscles.To highlight a possible application a study concerning muscle control has beenconducted. It answers the question of whether players score better with theirdominant arm in comparison with their non-dominant one.

Svenska Kraftnät is (together with the other transmission system operators of the Nordic power system) responsible for keeping balance between the generated and demanded power in the Nordic power system. Spontaneous load variations and system disturbances, however, lead to power imbalance followed by frequency variations. The frequency deviations can be limited to an acceptable level by the spinning reserve, mainly by hydro power control. But there are also other system properties which have a great influence on the frequency and system stability. The frequency and voltage dependence of the loads have a direct influence on the power balance.

The aim of the study was to explore the psychological well-being of a group of adolescents in relation to how they regarded achieving in school, in a gender perspective. Twenty semi-structured interviews were conducted with students aged 17-19 at a high-achieving school in a big city in Sweden. The interviews were analyzed thematically and the results showed that the adolescents acted differently as well as regarded achieving in school differently depending on gender. The young women were driven by ambition, they were high-achieving and planning for the future. The young men cared less about achieving and thought more about the present.

When the independent upper secondary schools were started in 1992, it meant a change in the competitive relationship for the local upper secondary schools. A reduced number of students during some years ahead, while the number of independent upper secondary schools increase will probably result in tougher competition between upper secondary schools.The purpose of this study is to review and compare financial and performance management between a public and an independent upper secondary school. The dissertation will focus on the now existing competitive relationship between the two types of upper secondary schools.The theory underlying the study is Porter's model - five competitive forces. The model is applied to the local upper secondary school and used to identify competitive factors affecting upper secondary schools. The study is using a qualitative approach with five interviews at two upper secondary schools, one independent and one public, located in the same town.The comparison of financial and operational management of upper secondary schools indicate that the differences are not as great as we first imagined, but that there still are some differences.

The automotive industry is a highly competitive market characterised by low profit margins or huge losses. Cost reductions have been of top priority for all OEM?s (Original Equipment Manufacturer) and will continue to be so for many years to come. Beside cost reductions, reducing the time-to-market is of greatest importance to stay in the competition. OEM?s that are slow to market with products that neither matches customer expectations nor the products of their competitors, will soon loose market shares and see their economical performance falter.

The purpose of this project was to further develop and complete a quadcopter that had been built in an earlier course at KTH, so that it could be used for demonstration and education at the school. The quadcopter was at the beginning of the project completed when it came to hardware, and there was some software functionality implemented but no system for automatic stabilization. The main goal of the project was to implement such a system, and to combine it with the previous functionality to make the quadcopter operable and able to fly. To create a functioning and stable ground multiple basic software features has been implemented, and on top of that additional software to improve the safety, stability and functionality. The most important part is the control system that is responsible for converting sensor and control signals to suitable motor values.

The purpose of this masters thesis is to examine how managers in public libraries are managing financial cuts. Questions posed are: What strategies are used by the library manager to handle the cuts and how are the strategies being worked out? What are the consequences of the cuts? How do the managers use their library plans in the work with the cuts and how do the plans change as a consequence of the cuts? Library managers in eleven communities are interviewed about their financial cuts in 2003 and/or 2004. The result shows that cuts are made in different ways. The study analysed the managers statements with a model about strategies created by Oulton.

Inbyggda system blir allt vanligare i dagens samhälle. De inbyggda systemen finns i nästan allt nuförtiden, från diverse fordon till leksaker för barn.Dagens teknik innebär bland annat att gårdagens lösningar kan realiseras på en bråkdel av den tidigare ytan. Allt mer blir ytmonterat med mindre och mer komplexa kretsar. Detta är inte alltid till utvecklarnas fördel då montering av prototypkort blir en svår och/eller dyr process.Målet är att ta fram ett inbyggt system med en ARM-processor. Systemet ska innehålla USB-OTG, ethernet, minne av olika slag som FRAM och microSD samt en display med pekskärm för användargränssnitt.

The aim of this study is to examine the possibilities to use gamification to reach thepolitical goals for the transportation system in the Stockholm region. The study has aninterdisciplinary approach and is based around two main building blocks: gamificationand the transportation system in the Stockholm region. The first part examinesgamification. This includes contemporary use, debate, academic definition and aninvestigation of how gamified applications should be developed. One of the mainfindings is a suggestion that gamification should be seen as a process rather that a setof predefined game mechanics that can be applied to any activity.