Modelica is a multi-domain and equation-based modeling language. Modelica is based on object-oriented principles and non-causal modeling. The language is constructed to facilitate reuse and decompose models. The models and the modellibrary can modified to design a new nonlinear components.Object-oriented modeling is an excellent way to analyze and study large complex heterogeneous physical systems. The object-oriented modeling approach build on reusing and decomposition of models and non-causal modeling.Modeling physical systems often leads to a DAE system with index 2 or 3.

This masters thesis concerns a modeling project performed at Volvo Technology in Gothenburg, Sweden. The main purpose of the project has been to develop a physical model of the climate in construction vehicles that later on can be used in the development of an electronic climate controller. The focus of the work has been on one type of wheel loader and one type of excavator. The temperature inside the compartment has been set equal to the notion climate. With physical theories about air flow and heat transfer in respect, relations between the components in the climate unit and the compartment has been calculated.

The purpose with the report is to show that it is possible to design a class-D amplifier, using a programmable FPGA mounted on a developing card from Xess and a H-bridge. The FPGA was programmed in VHDL which is the language the software from Xilinx use to implement a logical function into the FPGA The logical function corresponds to a modeling of the music signal and the modeling can be described as a comparator which compare the music signal with a triangle wave and as a out signal produce a pulse width modulated (PWM) signal. The report is also a review and evaluating of two different modulating technologies, AD- modeling and BD-modeling. A detailed part about how the H-bridge was designed and how it works. The result of this project is a working audio amplifier to a significant lower price than the products in todays market..

The purpose with this masters thesis was to model the scanner in a system for laser bathymetry. The model was then used to develop a controller for the scanner so a good search pattern was achieved. Two different types of models have been tested, a physical model and a Black Box model of Box Jenkins type. The physical model has been derived from Lagranges equations. Identification experiments have been used to compute the Black Box model and to find the unknown parameters in the physical model.

This thesis has examined the Tekla Structures modeling software and answered the question of whether it could act as a suitable modeling program for the design department at Bjerking AB in Uppsala. The method used in this work is a case study of a previous project with existing basis to work form. The demarcation of the study was to examine only the usability of the foundations of in situ concrete. The work examined three main areas within the design process. The first was to model the concrete elements then to model the reinforcing and ultimately production of the drawings. Because Autodesk Revit was the existing modeling program in the Department conducted the evaluation as a comparison between the two programs.

The purpose of this thesis is to describe what Building Information Modeling, BIM, could mean for landscape architects, and also hopefully to make sense of the possibilities and problems of the system. BIM is about virtual design and is based on all consultancy groups in the design team modeling in 3D. Intelligent objects and metadata, such as price and material, are used. The project group has a common interchange format for simple sharing of information. To get an idea of how the situation with BIM for landscape architects looks like today, I collected information mostly through interviews.

This report deals with the modeling of a part of the communication system based on the IEEE 802.11a standard which represents the next generation of wireless LAN with greater scalability, better interference immunity and significantly higher speed, up to 54 Mbps. 802.11a uses Orthogonal Frequency Division Multiplexing (OFDM) where modulation is performed by an IFFT and the demodulation by an FFT. After modeling the FFT in Matlab and C, the FFT implementation has been validated using a soft microprocessor core by Xilinx (Microblaze) and the results were compared..

At Forsmark nuclear power plant the rather old-fashioned software COPTA is used in containment safety analysis. There exists a desire within the organisation to introduce a more modern software with ability to more detailed modeling and increased usability.The goal of this thesis was to evaluate the software APROS in containment safety analysis. APROS models describing one of the containments at Forsmark NPP have been developed. Two simulations of typical containment incidents, one of them a large pipe break, have been made where containment safety parameters such as pressure and temperature are studied. Results are analyzed and verified against results from corresponding COPTA models.

Learning organizations and organizational development are interesting subjects that does not examine municipal organizations and private organizations an equal amount.  Furthermore, there exists little research on the effects of competence development for individuals in a leadership role within organizations. Because of this, we wanted to examine the impact of competence development in business modeling and how it affected local government activities. Competence development is used by organizations to develop their business and achieve a greater competitive advantage, but does competence development for individuals in a leadership role lead to organizational development? This paper examines competence development in the form of a business modeling course via the Bitstreamproject and the effects that occur within three municipalities as a result of the competence development. By interviewing three participants and four coworkers within different municipalities and studied the data from the Bitstream project, we can not conclude that competence development within business modeling leads to organizational development, only that it exists a tendency for it.

SammanfattningModular Management AB (MM) är en konsultfirma som arbetar med att implementera Modulära produktarkitekturer hos produktutvecklande företag. Företaget grundades i Stockholm år 1996 där huvudkontoret ligger än idag. De är världsledande inom sin genre och på grund av stor efterfrågan har kontor uppförts även i USAoch i Kina.Detta examensarbete är utfört på uppdrag av MM och har genomförts med hjälp av deras kunder i Finland samt kundens CAD-leverantör. Det behandlar modularisering och hur detta realiseras med hjälp av datorbaserad konstruktion (CAD). Detta är en MMs produkter och den kallas Modular Modeling.

Two ecological models of nitrogen processes in treatment wetlands have been evaluated and compared. These models have been implemented, simulated, and visualized in the Modelica language. The differences and similarities between the Modelica modeling environment used in this thesis and other environments or tools for ecological modeling have been evaluated. The modeling tools evaluated are PowerSim, Simile, Stella, the MathModelica Model Editor, and WEST. The evaluation and the analysis have been performed using McCall?s factors for software quality (McCall et al, 1977), a correlation analysis and the Constant Comparative Method (Glaser&Strauss, 1999).

A quart of the of the adult population worldwide havemetabolic syndrome. A sedentary lifestyle, low physicalactivity, combined with wrong eating habits, stress,smoking and psychosocial factors, are the main causes ofdevelopment of the metabolic syndrome. The purpose ofthe literature review was to illuminate the physicalactivity in persons who have the metabolic syndrome, andwhat sort of advice a nurse use in the promotion ofphysical activity. The study was conducted as a literaturereview, including 15 scientific quantitative articles. In tenarticles, the focus was on physical activity at themetabolic syndrome, and five articles focused on variousforms of counselling for physical activity.

Our lives in urban areas are becoming more and more inactive with negative effects on our mental and physical health. Natural environments and physical activity have the power to both prevent and reduce mental fatigue. Meanwhile we engage ourselves with physical activity, the nature fascinates us with its complexity. In April 2006, some of the visitors to the recreational area of Skrylle were asked to fill in a questionnaire which included questions about their habits within physical activity and the experience of nature. The questionnaires were then divided into two groups: those filled out by persons who exercise on regular basis (i.e. three or several times/week) and those who rarely exercise.

The task in this thesis is the steering of one of Saab Bofors Dynamics robots using Sliding Mode Control, a method they never used before. The robot constitutes a system which in addition to perturbations and uncertainties due to modeling imprecision, hold the difficulty of being highly time variant. In order to be able to keep required performance with uncertainties and modeling imprecision present, the use of robust control methods like Sliding Mode Control is necessary. SMC is based on the states of the system being forced to stay on or in the direct vicinity of a hyper plane in the state space which is chosen in a way that gives the system dynamics desired properties. Other advantages with sliding mode are reduced order dynamics on the switching surface and total insensitivity to some uncertainties and perturbations.

This study is a study of the assessment and grading of Swedish students with physical disabilities in physical education. The purpose of the study has been to look into how teachers assess and grade students with physical disabilities, and if there are any difficulties or problems in this assessment and grading. Focus has been on students in year three to six because this is where the assessments and grading take place. It?s a qualitative study, where eight teachers have been interviewed using a semi-structured interview model.