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4105 Uppsatser om Calculation model - Sida 21 av 274

FPGA baserad PWM-styrning av BLDC-motorer

This thesis work contains a litterature study about electrical motors in general and how PWM-patterns for brushless DC-motors can be made. A suitable method has been implemented as a simulation model in VHDL. A simulation model of a brushless DC-motor which describes the phasecurrents, torque and angular velocity has also been made. The motor model made simulations easier for the complete PWM-system. The design was synthesised and tested with a prototypeboard including a SPARTAN II FPGA.

Barn som vistas på kvinnohus : En fördjupning av Oasenmodellen som arbetsmetod

At the Women?s House in Örebro, a children?s project has started where the work method ?Oasen? [Oasis] model has been developed by two children?s educationists. The aim of this study is, with the ?Oasen? model as a starting point, to deepen the knowledge of (1) how to meet children?s central needs while staying at a Women?s House and (2) what the ?Oasen? model may contribute to the children. The theoretical framework consists of a cognitive approach to the progress of children experiencing domestic violence and a presentation of conceptions concerning children?s needs.

Finansiella nyckeltalens samspel som investeringsstrategi : En kombinationsmodell för att uppnå riskjusterad överavkastning

This study is based on a statistical analysis of fundamental key ratios on the Stockholm Stock Exchange during the period 2004-2012. In total 35 financial ratios of 90 companies were tested, ultimately five ratios remained within the 5% significance level. These ratios were ROA, P/B, Total Yield, EV/EBIT and Operating Margin. A custom made investment model was created based on the purpose to achieve a risk-adjusted excess return. The results in general did not show any significant difference in return between the model's portfolio and index.

  Olika betyg med hänsyn till program, elevernas och lärarnas kön? :   En undersökning av betygsmedelvärde i Svenska A, Matematik A och Engelska A i två olika gymnasieprogram och städer.

I have with this thesis sought to understand how chick lit could be useful in the classroom in the teaching of Swedish B-course in high school. Based on the model of critical literacy I am arguing that this genre would help to meet the objectives of the policy documents which, among other things, are to critically examine and analyze various types of texts.I have found that some of these texts could be used for analyzing and critically examine the ideological dimensions of texts and cultural heritage by the model of critical literacy, and also as a counterweight to the more traditional teaching of the canonical literature as a literary historical stuff that students should learn. I have also wanted to create a basis for discussions about literature in the classroom based on the chick lit genre. To do this I have, based on three themes and questions from the model of critical literacy, tried to focus on issues that might emerge from the ideological analysis and critical review. The model aims to deconstruct norms of society, and in the work of chick lit, I wanted to show how you could deconstruct norms around gender..

Kosovo - Självständighetens betydelse och möjligheter : En fallstudie i demokratiutveckling

The aim of this study is to examine the democratization process of Kosovo in the years after the countries independence was assured. Two central questions for the case study consist of whether a democratic improvement in the country has occurred and which factors, positive and negative, are present to further improve or impede the democratizationprocess. The study builds upon two central definitions, democratic states and democratization in order to gain theoretical background to be able to measure these two quite abstract expressions. A socioeconomic model is used to measure favorable or negative developments within Kosovos society and the findings of this model confirms the hypothesis of modernization theory, namely that increased socioeconomic development increases the chance of a positive democratizationprocess. There has been a positive democratic development aswell as socioecomic progress but since the nature of this study is merely descriptive and not explanatory, it doesnt make claims on the explanatory power of modernization theory.

INFORMATIONSÖVERFÖRING OCH KUNSKAPSÅTERVINNING : En studie i kalkylöverlämningsprocessen hos Erlandsson Bygg i Öst AB

Many enterprises have shortcomings in the transfer of information between different departments. Furthermore, routines for maintaining knowledge in order to be able to use this experience in the future are often lacking. Time and resources spent on improving these systems and procedures can provide significant benefits in terms of saved time and reduced costs in the later stages of a project. The benefit of this is not only a greater clarity and a reduced risk of misunderstandings, but also the preservation of knowledge that would otherwise be lost.The aim of this study has been to examine the process of information transfer and the transfer of knowledge between the calculus department and production manager in projects at Erlandsson Bygg i Öst AB. An additional aim was suggestions for improvements in the calculation handover and at the end of a project, where it was possible.The study was primarily conducted through literature studies and interviews.

"Nu är det slut på sossepjalleriet och pisshumanismen" : Om kravet på motprestationer inom socialtjänsten

The purpose of this study was to determine if and how the city district of Södra Innerstaden in Malmö, by using the Skärholms model, demand their client to reciprocate. The first problem set was to see how the demand was shown in the social service act from year 1998. From there the motives behind the introduction of the Skärholms model in city district of Södra Innerstaden were researched and also if there were a demand on reciprocity in city district of Södra Innerstaden public administration. The study was conducted in an exploratory way. The method used was to describe the idea behind Skärholms model after examining documents from the public administration.

Framtagning av beräkningshjälpmedel för tvärkraftbelastade förband med förbindare av metall.

The governing set of regulations for structural engineering in Sweden used to be Boverket, BKR. However in the beginning of the 21st century a changeover to new regulations, the Eurocodes, started.The transition was completed in year 2011 when the Eurocodes became the mandatory design work policy for all countries within the European Union. The Eurocodes were implemented to simplify and remove potential barriers to trade that may exist when countries have different design rules.  Since the changeover it has been important for all construction companies to update their knowledge base and their design software.When comparing the two calculation processes they seem similar, but there are a couple of differences worth noting.  With the new regulations, engineers will find that the process when designing joints in timber structures has changed.  What used to be a fairly easy and straight forward calculation procedure has now become tedious and time consuming.The objective of this degree project is to present a product, a dimensioning tool that will help structural engineers when computing lateral load carrying joints in timber structures.The degree project is made up of two parts where the first part is the written report describing the background and theory behind load carrying computations. The second part of the project is the actual dimensioning tool which includes several worksheets in Microsoft Excel. The program treats single and double shear connections of the following:Nail jointsScrew jointsSteel plates (thick and thin types) The user can edit the following parameters:Type of plate/ number of shearsStrength class of timber membersMember and plate sizeType of fastenerDiameter of fastenerLength of fastenerYield moment of fastenerkmod and partial factors for design load carrying capacityThe dimensioning tool was created and developed in collaboration with structural engineers at the company Byggteknik AB.

Betydelsen av att samverka : En studie av det interorganisatoriska samarbetet kring demensvården i Halland

The purpose of our study is to interpret and understand the collaborative process around a regional model that is based on state developed guidelines for people with dementia. We have chosen to focus on the importance of interaction and have therefore interviewed participants in the project's steering committee. This group participates in efforts to develop a model for dementia care in Halland.The project work in Halland, to develop a joint model for people with dementia and their families was initiated in the spring of 2011 and is due to finish at the end of 2012. The Halland model has been named ?Annas led? and is about Anna and her husband Lars and living with dementia.

Kan vi prata om det? Deliberativ demokrati, mångfald och politisk kamp

In recent years the liberal representative democracy has been subject of a substantial critique because of its inability to accommodate difference and createa genuinely democratic political process. One such critique comes from the theory of deliberative democracy. Supporters of deliberative democracy try to promote a model of democracy that take its vantage point in free and equal deliberationbetween all relevant actors in a political community. This model has with some success opposed the aggregative model of democracy, and in important ways turned the attention to the potential of deliberative processes.However, the deliberative model is still somewhat underdeveloped when it comes to issues of diversity and difference. This essay deals with such deficiencies by analysing deliberative democracy in the light of the critiquelaunched by difference- and radical democrats.

Förvärv och Företagskultur

Background: Acquisitions are a well-known method for increasing company size and strength on the market. But to reach the targets set, more than just a positive economic calculation is required. An atmosphere that supports the company's integration is needed, for which it is of great importance for management to understand the underlying sets of values that exist in the organisation, and to take into consideration the way they might become an obstacle or a tool for a successful integration. Purpose: The purpose of this thesis is to explain and understand how cultural change occurs and how it affects the employee, as a smaller company is bought and integrated into a larger organisation. Procedure: The analysis is based on theories on organisational culture and organisational change.

Bokbloggen i de litterära kretsloppen : En litteratursociologisk analys

This thesis explores the position of book blogs in the literary system through Robert Escarpit's socio-literary model of the book market. Simultaneously the thesis serves as a test for Escarpit's theory: by actively applying his theory and model to a very new and contemporary actor on the book market I hoped to reach or confirm new insights into the usefulness and validity of Escarpit's work for contemporary socio-literary studies.Three book blogs were selected for the analysis and interviews were carried out with the authors. The interview questions were formulated specifically for the purpose of extracting the kind of information necessary for an analysis using Escarpit?s theory. As a complement to the interviews, statistics on the type of books reviewed on the blogs were also compiled.

1-D Modellering av Piezoelektrisk Injektor

A piezoelectric injector was modeled, in this Master Thesis Project which was carried out at Scania CV AB in Södertälje, in GT-Fuel. GT-Fuel is simulation program from Gamma Technology.The simulation model for the piezo injector was divided into a hydro-mechanical system and an electrical system (Piezoelectric element). First the hydro-mechanic model was duplicated from Advance Continuous Simulation Language model (ACSL). The simulation results were then compared to the ACSL, to verify that the hydro-mechanical system was modeled correctly. The simulation results for the electrical model were also compared with a Simulink model.

Utmattningsdepression : En studie om det moderna arbetslivets relation till psykisk ohälsa utifrån fem kvalitativa intervjuer

The purpose of this essay is to try to understand the relationship between the structures of modern working life and the development of burnout. By using the method of qualitative interviews we wanted to see if the Effort-Reward Imbalance Model could be applied to the data we had collected. Two questions have been highlighted in our research:        ? Is it possible to establish a relationship between the structures of modern working life and the development of burnout among the subjects interviewed?  ? Is it possible to explain the development of burnout among our interviewed subjects through the Effort-Reward Imbalance Model?    Our theoretical frames are the general theories of the modern society and the modern working life as developed by Anthony Giddens, Ulrich Beck and Zygmunt Bauman. We have also used Johannes Siegrist?s medical-sociological Effort-Reward Imbalance Model (ERI-Model).

Modellbaserad temperaturregleringav partikelfiltrets regenereringsprocess

Due to increasing regulations regarding new diesel vehicles particulate matteremissions the new Scania truck, Scania Euro 6, has been equipped with a particulatefilter. This component effectively stores the particles in the exhaust gas but must becleaned in order to prevent itself from clogging. The filter is cleaned through aprocess named regeneration which is a thermodynamic process in which thetemperature of the filter is raised through fuel supplied to the exhaust gas.The purpose of this thesis is to contribute to the development of improved controlstrategies of the temperature during the regeneration process through thedevelopment of model-based controllers. These controllers are designed in order tohave good performance in stationary as well as automatic regeneration.In order to develop these model-based controllers a model of the system isconstructed. The model is described as a linear thermodynamic grey-box model withflow varying parameters, showing good results in validation.The model provides a simulation environment during the controller design, which isfocused around the development of linear regulators with the exhaust gas mass flowas a scheduling variable whose size determines controllers? mode of operation.

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