The power system modelled in this thesis work has been developed for simulationwhen e.g. the production in some part of the power system is changed. The powersystem has been modelled according to the swing mass of the system, the frequencydependency of the load and the turbine governor. The model determines the systemfrequency, the period of regulation and the power exchange between the differentsubsystems in the Nordic synchronized system.In this model the system frequency is assumed to be the same in all different parts ofthe power system and the voltage conditions in the power system are neglected. Forthat reason power swings does not occur between different subsystems in the powersystem, which usually occur as a result of the swinging connection between thetransmissions line.

The starting point of this work has been to get knowledge about teachers working in a mathematical workshop with the students. I also wanted to investigate what students think about math, both within the workshop and in traditional teaching.To achieve this I chose to interview a teacher in charge within the framework of a mathematical workshop, and six students in the 5th grade. I also did a lesson observation with the purpose to see how well the teacher?s tutoring agrees with the results of the interview.In this study I have discovered that the lessons in the mathematical workshop are planned after what the students are working with in the textbook. The teacher opens the lessons with the whole class and then splits it up in groups.

Warmer climate is a driving factor to species expansion northwards. Expansion to new areas can result in escape from natural enemies, resulting in reduced levels of mortality and thereby potentially increasing the rate of expansion. The most important parasitoid species attacking butterfly larvae belong to the families Tachinidae, Ichneumonidae and Braconidae. The aim of this thesis was to investigate parasitism and difference between populations in established area and newly colonized area for the European map butterfly, Araschnia levana, in order to examine if the butterfly has escaped from some natural enemies. In 1982 the first European map butterfly was observed in Sweden and has now established up to middle Småland.

This master thesis concerns the relationship the librarianhas to the libraries classification system. The system itselfis made by librarians for librarians and is only used bylibrarians. This raises the question of how the librariansrelate to their own system to create order. The empiricalmaterial consists of five in-depth interviews with librarians.Two theoretical approaches were used in the analysis of thematerial with one focus on the librarian?s professional rolland the other on the postmodern theories about humansneed for order.

There are regulations in sweden that require organizations to manage occupational,  health and safetey (OH&S) issues in a systematic way. The contents of the management system vary depending of the activity of the specific organisation. An accurate management system is crucial in order to assure that rules and regulations are fullfilled. The OHSAS 18001 standard covering OH&S management is intended to provide organizations with the elements of an efficient OH&S management system. The work with this thesis was done at Swemat AB in Härnösand wich is a mechanical industry. In the thesis, the requirements of the OHSAS standard are compared with the current management system.

Problem: Our opinion is that it is important to consider about usability in system development. In this thesis we will focus on usability in point-of-sale systems. The point-of-sale system we base this thesis on is Extenda Retail. Our case study is performed on Ica Kvantum in Bromölla, which implemented Extenda Retail about two years ago. Purpose: The purpose of this thesis is to figure out what important factors there are to consider, in usability aspects, when developing point-of-sale systems, with focus on the cashier.

Syfte: Uppsatsens syfte är att klargöra skillnaden mellan olika sorters rabatterade erbjudanden som kampanj och rea i Ur&Penns butiker. Syftet är även att se hur konsumenter ser på rabatterade erbjudanden och hur deras lojalitet kan påverkas av detta.Metod: En kombination av kvalitativa och kvantitativa metoder har använts med en abduktiv ansats. Insamling av data har skett via enkäter, intervju och observation. Uppsatsen riktar sig in på att undersöka Ur&Penns marknad.Teori: Teorier som använts i uppsatsen beskriver prisstrategier, rabatterade erbjudanden, lojalitet ur konsumentperspektiv samt tar upp utsnitt ur marknadsföringslagen.Empiri: Empirin består av tre delar: webbenkät, intervju och en observation. Webbenkäten är skapad ur ett konsumentperspektiv medan intervjun är ur ett företagsperspektiv.

This study investigates communication and data in information systems. The paper deals, more specificly, with communication in a CRM-system implemented in a Swedish-founded company in Beijing, China. It discusses cultural, political, linguistic and gender based dilemmas that can arise from the use of a CRM-system in an international and bilingual environment. Fifty-nine interviews were conducted in Sweden and in China, either in Swedish or English. The result of this study shows that communication in the information system is affected by factors, that are not originated in technical shortcomings of the system, but rather from cultural, political, linguistic and gender based pre-knowledge among individuals.

The purpose of this thesis is to analyse and propose improvements to the cost accounting system in use at an airline operating on the Swedish market. The choice of study object is based on the airline?s desire to have its cost accounting system evaluated. During the analysis we have identified a number of points where the current cost accounting system does not correspond to its intended purpose. These points include significant groups of costs not being considered in the current system, potential over capacity is not visible and logic connections between distribution keys and the use of resources are sometimes lacking.

The aim of this Masters thesis is to conduct an analysis of the Swedish classification system the SAB-system from a feminist and queer theoretical perspective. The theoretical framework of the study is feminist and queer theory as well as theories from Library and Information Science, mainly classification theory. The study takes its departure from the idea of classification systems as social constructs, reflecting their time, place and society. Paul Ricoeurs critical hermeneutics is used as methodological guidance. This gives room for a critical perspective in the interpretation.

The development in electronics increases the demand for good design methods and design tools in the field of electrical engeneering. To improve their design methods Ericsson Microwave Systems AB is interested in using computer tools to create a link between the specification and the implementation of a digital system in a FPGA. Xilinx System Generator for DSP is a tool for implementing a model of a digital signalprocessing algorithm in a Xilinx FPGA. To evaluate Xilinx System Generator two testcases has been designed. The testcases are selected to represent the FPGA designs made at Ericsson Microwave Systems.

Denna rapport avser att undersöka för- och nackdelar med att utveckla ett för ändamålet specialanpassat system eller utnyttja de standardsystem, som i det aktuella fallet tryckerikoncernen JMS redan äger och använder. Genom en mer noggrann definiering av ickefunktionella krav på bland annat användbarhet har en specialanpassad prototyp framställts. I projektet användes metoder för kravinsamling som ledde till en kravspecifikation och i sin tur slutade med en färdig prototyp. Prototypen jämfördes med två standardsystem genom användartester och intervjuer. Prototypen visade sig leva upp till de krav som upptäcktes.

AbstractThis paper discusses how system development methods today support communication between system developers and their customers and end users. Today there are many system development methodologies with different aims and emphases. It is difficult, however, to find among these methods those who promote good and effective communication with customers because so many of these are very technically rooted and not as much directed towards the soft aspects of systems development - i.e. Human aspects. Our own experiences tells that a simple interview can be initialized without us having an idea what to ask the customer about or how to structure it up - nonetheless it?s done, but the outcome is just chance.

This paper investigates the internal product costing system in one of the Swedish banks with the purpose to evaluate the quality of its product costs and possible implications on decision making. The study shows that the current system distorts product costs by, among other things, using relative allocation of costs and time and by allocating all costs to individual units of products. We therefore propose an alternative product costing system, which mainly draws on ABC theory but is also adapted to the specific needs of service companies and of the Bank. This proposal is intended as a solution in this particular case and not to be generalized in other contexts. We hope however to add to the understanding of why more complex costing systems, such as the ones based on ABC theory are, according to previous studies, not widely used in practice.

Syfte: Uppsatsens syfte är att klargöra skillnaden mellan olika sorters rabatterade erbjudanden som kampanj och rea i Ur&Penns butiker. Syftet är även att se hur konsumenter ser på rabatterade erbjudanden och hur deras lojalitet kan påverkas av detta.Metod: En kombination av kvalitativa och kvantitativa metoder har använts med en abduktiv ansats. Insamling av data har skett via enkäter, intervju och observation. Uppsatsen riktar sig in på att undersöka Ur&Penns marknad.Teori: Teorier som använts i uppsatsen beskriver prisstrategier, rabatterade erbjudanden, lojalitet ur konsumentperspektiv samt tar upp utsnitt ur marknadsföringslagen.Empiri: Empirin består av tre delar: webbenkät, intervju och en observation. Webbenkäten är skapad ur ett konsumentperspektiv medan intervjun är ur ett företagsperspektiv.