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  • 1.
    Abdulkareem, Alaa Adnan
    University West, Department of Technology, Mathematics and Computer Science.
    Modelling, simulation and control of a PTC machine hall2007Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    In this master thesis a flexible manufacturing system for a PTC machine hall has been modelled and simulated using RobCad. This system includes several equipments and machines which have been modelled and arranged to come up with three possible layouts. The machine hall in UW will be moved to a new place in Innovatum (a research area in Trollhättan). The machines were chosen from the existing machine hall according to UW requirements in order not to buy new machines because of economic reasons. The number of cells was also set by UW. The machines and equipments that will be moved are; two CNC machines, three ABB robots, a 4-axis gantry robot which transport the materials between the cells and a conveyor or a flex link which has been proposed in this project for the loading/unloading station use. The purposes of moving the machine hall to Innovatum are: - More people will be able to use the machine hall (i.e. UW, other schools and costumers from other companies for training purposes). - The environment will be more available to do more production operations using the robots and machines. - It will be a good opportunity to develop the programs and software, for that will let UW be able to hire a whole automation package to the costumers. - Students will be nearby to the industries'9 environment and may have more contact with different companies. - Since the new machine hall will attract costumers it will gain incomes to UW. Three layouts have been proposed in this thesis work, and these layouts fulfil all or most of the requirements of the costumers and users.

  • 2.
    Aguilar, Ximena
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Jason, Daria
    University West, Department of Technology, Mathematics and Computer Science.
    Nätplan för fördelningsstationen TT7142 Ånimskog: Vattenfall Eldistribution AB2004Independent thesis Advanced level (professional degree)Student thesis
  • 3.
    Ahlström, Maria
    University West, Department of Technology, Mathematics and Computer Science.
    Selektivplan över mellanspänningsanläggningar på Munkedals AB2005Independent thesis Advanced level (professional degree)Student thesis
  • 4.
    Ahrenberg, Magnus
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Olofsson, Andreas
    University West, Department of Technology, Mathematics and Computer Science.
    En nogrannhetsjämförelse mellan Nätverks-Rtk Och Nätverks-DGPS2005Independent thesis Advanced level (professional degree)Student thesis
  • 5.
    Albinsson, Bengt-Åke
    University West, Department of Technology, Mathematics and Computer Science.
    Enhandsmanövrerad slanganslutning till dammsugare2005Independent thesis Advanced level (professional degree)Student thesis
  • 6.
    Alexandersson, Anders
    University West, Department of Technology, Mathematics and Computer Science.
    RubyComp: a Ruby to CIL compiler2004Independent thesis Advanced level (degree of Master (One Year))Student thesis
  • 7.
    Alhabashneh, Mohammad Abad Alhameed
    University West, Department of Technology, Mathematics and Computer Science.
    Project and team handler (PTH)2006Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    There is always a need for easy-to-follow processes that enable accurate and non-time consuming solutions. Nowadays we see a lot of different approaches to development processes in software engineering. This project is concerned with how to manage a software development process in a reliable, secure and efficient way. Software is available which provides some help for project managers / administrators to work more productively, with effective communication. Using such systems, it is possible to keep track of all the phases of development, including task distribution, making maximum use of previous hands-on experience and increasing productivity, to deliver a finished product in minimum time. No existing solution, however, fulfills all the desirable criteria. This paper describes the motivation, design and implementation of an improved development management system using Active Server Pages and Microsoft Internet Information Services with a backend Microsoft Access Database developed using a waterfall software development process. The resulting system is described and evaluated. This system will be beneficial for software houses, because they can communicate on the web, allowing efficiency gains by avoiding the need to call meetings for distribution of tasks among employees, with the additional advantage of location-transparent team management through the Internet.

  • 8.
    Ali, Murad
    University West, Department of Technology, Mathematics and Computer Science.
    Offline constraint-based routing in OSPF networks: a server based study2007Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Many of the network applications today are demanding QoS guaranteed paths which the best effort routing protocols e.g. OSPF cannot calculate, because these protocols are topology driven, do not address many of the constraints by these applications and only calculate shortest paths. In this thesis offline constraint based routing is studied for Open Shortest Path First (OSPFv2) protocol single area network and an offline server is proposed for QoS guaranteed routing. The server builds traffic engineering (TE) database and calculates QoS guaranteed paths on behalf of all the routers in that area. The client routers only do best effort routing for normal data flows with no requirement for QoS guaranteed paths. The client routers use NETCONF protocol to download QoS routes from the offline server (OS). The offline server besides calculating QoS paths also reduces congestion and helps in efficiently utilizing the network resources, for example bandwidth.

  • 9.
    Ali, Zana
    University West, Department of Technology, Mathematics and Computer Science.
    Webbtjänst för projektledare: ett stöd för ekonomiska uppskattningar2004Independent thesis Advanced level (professional degree)Student thesis
  • 10.
    Alphonce, Magori
    University West, Department of Technology, Mathematics and Computer Science.
    Use of software verification & validation (V&V) techniques for software process improvement2006Independent thesis Advanced level (degree of Master (One Year))Student thesis
  • 11.
    Anderberg, Staffan
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Beno, Tomas
    University West, Department of Engineering Science, Division of Production Engineering.
    Pejryd, Lars
    University West, Department of Engineering Science, Division of Production Engineering.
    Production preparation methodology in Swedish metal working industry - a State of the Art investigation2008In: Swedish Production Symposium, Stockholm 18-20 November 2008. Proceedings: The Swedish Production Academy's annual conference / [ed] Bengt Lindberg och Johan Stahre, Stockholm: The Swedish Production Academy , 2008, p. 443-450Conference paper (Other academic)
    Abstract [en]

    This article presents a brief state of the art in the Swedish metal working industry regarding the production preparation process for the machine centre. The article is based on a relationship model from which a questionnaire was developed. The model incorporates the perceived preparation process efficiency, the amount of systematic preparation work, in relation to the companies’ premises as possible causes. The investigation is based on a general hypothesis that a more systematic approach in the preparation process leads to higher preparation process efficiency. This hypothesis was supplemented by two more hypotheses and additional analyses to create an understanding of the situation. The main finding in this investigation is that there appear to be no relationship between increased  ystematic preparation work and perception of higher preparation efficiency. The investigation also indicates that many metal working companies have little knowledge about the performance of their preparation process and that there is an efficiency improvement potential of nearly 30%.

  • 12.
    Andersson, Arvid
    University West, Department of Technology, Mathematics and Computer Science.
    Anslutning av en PDA till en monitor2004Independent thesis Advanced level (professional degree)Student thesis
  • 13.
    Andersson, Fredrik
    University West, Department of Technology, Mathematics and Computer Science.
    Konstruktion och utprovning av monteringsverktyg för motorfäste- och lyftörebussningar till TEC V2500: Volvo Aero Corporation, avd 98562004Independent thesis Advanced level (professional degree)Student thesis
  • 14.
    Andersson, Kathrine
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Bennhage, Malin
    University West, Department of Technology, Mathematics and Computer Science.
    Processen att tillhandahålla reservdelar, Saab Automobile AB: k+D769artläggning och förslag till förbättringar2004Independent thesis Advanced level (professional degree)Student thesis
  • 15.
    Andersson, Lars
    University West, Department of Technology, Mathematics and Computer Science.
    Analys av systemegenskaper vid kablifiering av mellanspänningsnät2006Independent thesis Advanced level (professional degree)Student thesis
    Abstract [sv]

    För att förbättra elleveransen till kund genomför Vattenfall Eldistribution AB en successiv kablifiering av mellanspänningsnätet. En effekt av denna kablifiering är att näten får förändrade systemegenskaper. Förändringen innebär att det vid ett jordfel skapas en oönskad resistiv strömkomponent (Ir) från ledningssystemet, vilket ger problem med de elsäkerhetskrav som ställs. En förutsättning för att hantera jordfelsströmmar i stora kabelnät är att Ir reduceras, för detta ändamål saknas idag väl fungerande tekniska lösningar. Detta arbete syftar till att genomföra en analys av systemegenskaper vid kablifiering. Vidare är syftet att ta fram ett underlag för kravspecificering av kablar samt söka svar på frågan om hur man med hjälp av utlokaliserade spolar kan minimera de negativa verkningar som kablifiering av näten medför. Resultat från studien visar att Ir kan minska genom att öka kablars skärmarea och minska dess kapacitans, störst effekt ger en förändring av kapacitansen. Vidare visar arbetet att nätens konfiguration påverkar storleken på Ir, störst problem ger långsträckta nät. En effektiv metod att reducera Ir är att tillämpa utlokaliserad kompensering, alltså spolar placerade ute i näten. Metoden är särskilt effektiv på långa utledningar. En annan effekt av utlokaliserade reaktorer är att betydelsen av kablarnas elektriska egenskaper minskar. I denna studie framkommer inga alternativ till utlokaliserad kompensering i stora kabelnät.

  • 16. Andersson, M.
    et al.
    Heldal, R.
    Christiernin, Linn G.
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Applying task-based division in multi-layered design: an industrial case study2005In: Human-Computer Interaction 2005: Proceeding of The IASTED International Conference on Human-Computer Interaction (IASTED-HCI)Phoenix, USA, November 14 - 16, 2005, Acta Press , 2005Conference paper (Refereed)
  • 17.
    Andersson, Maria
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Klang, Anette
    University West, Department of Technology, Mathematics and Computer Science.
    Gustafsson, Carina
    University West, Department of Technology, Mathematics and Computer Science.
    Anpassning av befintligt stomnät för GPS-mätning i Åmåls kommun2004Independent thesis Advanced level (professional degree)Student thesis
  • 18.
    Andersson, Markus
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Ljunggren, Patrik
    University West, Department of Technology, Mathematics and Computer Science.
    Kontrollreducering2005Independent thesis Advanced level (professional degree)Student thesis
  • 19.
    Andersson, Mats
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Åhman, Andreas
    University West, Department of Technology, Mathematics and Computer Science.
    Brandväggens arkitektur och filtrering2005Independent thesis Advanced level (professional degree)Student thesis
  • 20.
    Andersson, Mattias
    University West, Department of Technology, Mathematics and Computer Science.
    UDO: ett steg närmre friheten2006Independent thesis Advanced level (degree of Master (One Year))Student thesis
  • 21.
    Andersson, Nina
    University West, Department of Technology, Mathematics and Computer Science.
    Förslag till optimering av bladtillverkning i syfte att sänka tillverkningskostnaderna för VINCI LOX och LH2 turbinerna2005Independent thesis Advanced level (professional degree)Student thesis
  • 22.
    André, Daniel
    University West, Department of Technology, Mathematics and Computer Science.
    Ombyggnation av vakuumanläggningen på Stena Danica2004Independent thesis Advanced level (professional degree)Student thesis
  • 23.
    Anna, Ericsson
    University West, Department of Technology, Mathematics and Computer Science.
    Utveckling av fastighetsmäklartjänsten: a Ruby-to-LLVM compiler prototype2004Independent thesis Advanced level (professional degree)Student thesis
  • 24.
    Antonsson, Susanne
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Johansson, Birgitte
    University West, Department of Technology, Mathematics and Computer Science.
    Affärssystem som stöd för ledningssystem samt motiv för att integrera ledningssystem2004Independent thesis Advanced level (professional degree)Student thesis
  • 25.
    Aravena, Carolina
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Berg, Annika
    University West, Department of Technology, Mathematics and Computer Science.
    Dolda fel vid fastighetsförsäljning2006Independent thesis Advanced level (professional degree)Student thesis
    Abstract [sv]

    Med detta examensarbete ska vi försöka förklara vad dolda fel är, som kan upptäckas efter en fastighetsförsäljning. Vi tittar på frågan ur både säljaren och köparens synvinklar och vad fastighetsmäklaren och besiktningsmannen har för roller och ansvar i frågan. Med en artikel från tidningen Vi i villa ger vi några exempel på vad som kan tolkas vara dolda fel eller inte. Vi har också tittat lite på de försäkringar som finns och kan tecknas mot dolda fel. Slutligen har vi en spännande motion till riksdagen som visar hur många i branschen vill utveckla och förändra det nuvarande systemet

  • 26.
    Arsenault, B.
    et al.
    Industrial Materials Institute, NRC, Boucherville, Que., Canada.
    Gougeon, P.
    University West, Department of Technology, Mathematics and Computer Science.
    Verdier, M.
    Université de Technologie Belfort-Montbéliard, Laboratoire d'Etudes et des Recherches sur les Materiaux les Procedes et les Surfaces (LERMPS).
    Duquesnay, D. L.
    Royal Military College of Canada, Department of Mechanical Engineering.
    Aluminum protective coatings - Fatigue and bond strength properties with respect to surface preparation techniques: Laser ablation, shot peening and grit blasting2006In: Canadian metallurgical quarterly, ISSN 0008-4433, E-ISSN 1879-1395, Vol. 45, no 1, p. 49-58Article in journal (Refereed)
    Abstract [en]

    Aluminum coatings can provide galvanic cathodic protection for several metals and alloys. In order to be a suitable protective solution on structural components, the mechanical integrity must be preserved. In particular, the fatigue properties are a challenge for thermal spray protective coatings on mechanical structures. To address the issue of the fatigue integrity of 7075 aluminum alloy with an arc sprayed protective coating, different surface preparations prior to arc spraying were considered. In the present work, a feasibility study was performed using laser ablation as a surface preparation technique before or during arc spraying of coatings through collaboration between the LERMPS laboratory in France, the National Research Council of Canada and the Royal Military College of Canada. Both fatigue and adhesive properties of aluminum coatings were evaluated in relation to substrate surface preparation techniques including laser ablation (PROTAL® process), grit blasting and shot peening. Results indicate that a combination of key conditions including using nitrogen as the arc spray gas, shot peening and proper laser energy density for ablation provides high fatigue resistance of metallic coated 7075 alloy substrates. Specimens prepared under these conditions show a similar fatigue resistance to uncoated substrates. © Canadian Institute of Mining, Metallurgy and Petroleum.

  • 27.
    Bahbou, M. Fouzi
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    A study of the adhesion strength of plasma sprayed coatings2007Doctoral thesis, comprehensive summary (Other academic)
  • 28.
    Bahbou, M. Fouzi
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Choquet, Isabelle
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Clement, Uta
    Numerical and experimental study of Ni-particle impact on a ti-surfaceIn: Journal of thermal spray technology (Print), ISSN 1059-9630, E-ISSN 1544-1016Article in journal (Refereed)
  • 29.
    Bahbou, M. Fouzi
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Choquet, Isabelle
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Nylén, Per
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Numerical and Experimental Study of Ni-Particle Impact On A Ti-Surface2007In: Proceedings of the International Thermal Spray Conference: May 2007, Beijing, China, ASM International , 2007, p. 219-224Conference paper (Refereed)
  • 30.
    Bahbou, M. Fouzi
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Nylén, Per
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    On-Line Measurement of Plasma-Sprayed Ni-Particles during Impact on a Ti-Surface: influence of Surface Oxidation2007In: Journal of thermal spray technology (Print), ISSN 1059-9630, E-ISSN 1544-1016, Vol. 16, no 4, p. 506-511Article in journal (Refereed)
    Abstract [en]

    The objective of this study was to analyze the impact of plasma-sprayed Ni5%Al particles on polished and grit-blasted Ti6Al4V samples under oxidized and nonoxidized conditions. For this purpose, measurements of thermal radiation and velocity of individual plasma-sprayed particles were carried out. From the thermal radiation at impact, splat diameter during flattening and temperature evolution during cooling were evaluated. Characteristic parameters related to the quality of contact between the splat and the substrate were retrieved. The flattening speed was introduced to characterize wetting, while the cooling rate was used to characterize solidification. The idea was to get a signature of particle impact for a given surface roughness and oxidation state by identifying parameters which strongly affect the splat behavior. Sieved Ni5%Al powder in a narrow range (+65 −75 μm) was sprayed on four sets of titanium alloy surfaces, consisting of polished and grit-blasted samples, one set had a nonoxidized surface and the other one was oxidized in an oven at 600 °C for two hours. Resulting splats after impact were characterized by scanning electron microscopy, the splats on oxidized surface showed pores in their core and detached fingers at the periphery. The cooling rate and flattening degree significantly increased on the oxidized smooth surface compared to the nonoxidized one. This trend was not found in grit-blasted surfaces, which implies that impact phenomena are different on grit-blasted surfaces than on smooth surfaces thus further work is needed.

  • 31.
    Bahbou, M. Fouzi
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Nylén, Per
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    On-Line measurement of plasma-sprayed ni-particles during impact on a ti-surface: influence of surface oxidation2007In: Journal of thermal spray technology (Print), ISSN 1059-9630, E-ISSN 1544-1016, Vol. 16, no 6, p. 506-511Article in journal (Refereed)
    Abstract [en]

    The objective of this study was to analyze the impact of plasma-sprayed Ni5%Al particles on polished and grit-blasted Ti6Al4V samples under oxidized and nonoxidized conditions. For this purpose, measurements of thermal radiation and velocity of individual plasma-sprayed particles were carried out. From the thermal radiation at impact, splat diameter during flattening and temperature evolution during cooling were evaluated. Characteristic parameters related to the quality of contact between the splat and the substrate were retrieved. The flattening speed was introduced to characterize wetting, while the cooling rate was used to characterize solidification. The idea was to get a signature of particle impact for a given surface roughness and oxidation state by identifying parameters which strongly affect the splat behavior. Sieved Ni5%Al powder in a narrow range (+65 −75 μm) was sprayed on four sets of titanium alloy surfaces, consisting of polished and grit-blasted samples, one set had a nonoxidized surface and the other one was oxidized in an oven at 600 °C for two hours. Resulting splats after impact were characterized by scanning electron microscopy, the splats on oxidized surface showed pores in their core and detached fingers at the periphery. The cooling rate and flattening degree significantly increased on the oxidized smooth surface compared to the nonoxidized one. This trend was not found in grit-blasted surfaces, which implies that impact phenomena are different on grit-blasted surfaces than on smooth surfaces thus further work is needed.

  • 32.
    Bahbou, M. Fouzi
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Nylén, Per
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Relationship between surface topgraphy parameters and adhesion strength for plasma spraying2005In: ITSC 2005: Thermal Spray connects: Explore its surfacing potential!, The Material Information Society , 2005, p. 1027-1031Conference paper (Refereed)
    Abstract [en]

    To achieve sufficient adhesion strength within thermal spraying, the surface to be coated has to be modified. Grit blasting is the most common way to generate a clean and roughened surface. The bonding mechanism between the grit-blasted substrate and the coating is assumed to be due to mechanical anchoring, why an optimal surface roughness is essential. The surface roughness is usually evaluated using Ra which cannot fully characterize the complex nature of the chaotic substrate topography. This study was performed in order to evaluate if Ra can be replaced by other surface characteristic parameters such us R.q, Rpk, Rpv, Rk…with higher correlation to adhesion strength. Average roughness was measured by a perthometer and with white light interferometry to get 3D images of the surface topography. Disc shaped substrate samples of Ti6Al4V (AMS 4928) were grit blasted with aluminium oxide grit and plasma sprayed with a Ni5%Al coating. Adhesion strength was determined according to the ASTM C633 standard. The correlation between a number of different surface-parameters and adhesion strength were evaluated and compared with Ra.

  • 33.
    Bahbou, M. Fouzi
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Nylén, Per
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Two-step grit blasting for enhanced adhesion of thermal spray coatings2004In: Surface modification technologies XVIII: proceedings of the eighteenth international conference on surface modification technologies held in Dijon, France November 15-17, 2004, 2004, p. 23-27Conference paper (Refereed)
  • 34.
    Bahbou, M. Fouzi
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Nylén, Per
    University West, Department of Engineering Science, Division of Production Engineering.
    Barbezat, G.
    Sulzer Metco, Wohlen, Switzerland .
    A parameter study of the Protal® Process to optimise the adhesion of Ni5Al Coatings2004In: Thermal Spray 2004 : Advances in technology and applications: Proceedings of the International Thermal Spray Conference 10-12 May 2004, Osaka, Japan Thermal Spray 2004, 2004, p. 898-902Conference paper (Refereed)
    Abstract [en]

    The Protal process combines surface preparation using a laser and thermal spraying in one production step. The laser preparation is based on a photomechanical reaction induced by the interaction between a laser of high instantaneous power and a polluted surface. The mechanism of bonding and the coating-substrate interface are then changed in comparison with grit blasting resulting in a significantly reduced substrate roughness. This study is aimed at finding the optimal Protal process parameters for the coating adhesion of a Ni5%Al sprayed on Ti6Al4V and IN718 alloys. The parameters investigated are laser beam intensity, the time delay between the laser impact and the spray impact, powder feed rate, substrate roughness and temperature. A test plan including these parameters is analysed by means of a fractional factorial design of experiment method. The adhesions of the coatings are measured using the ASTM C633 standard test. Data are analysed by a multiple linear regression model using a least squares fit. In addition, the coating/substrate interface is examined by optical and electron scanning microscopy (SEM) techniques as well as by Auger electron spectroscopy. Substrate roughness, substrate temperature and laser intensity are all shown to have a negative correlation with adhesion strength within the investigated range. Areas of diffusion are noticed at the coating/substrate interface.

  • 35.
    Bahbou, M. Fouzi
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Nylén, Per
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Wigren, J.
    Volvo Aero, Trollhättan.
    Effect of grit blasting and spraying angle on the adhesion strength of a plasma-sprayed coating2004In: Journal of thermal spray technology (Print), ISSN 1059-9630, E-ISSN 1544-1016, Vol. 13, no 4, p. 508-514Article in journal (Refereed)
  • 36.
    Bandgren, Lena
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Eriksson, Maria
    University West, Department of Technology, Mathematics and Computer Science.
    Johansson, Annica
    University West, Department of Technology, Mathematics and Computer Science.
    Symbolbaserad interaktion i vården: ett komplement till VIPS2004Independent thesis Advanced level (professional degree)Student thesis
  • 37.
    Beaubert, F.
    et al.
    TEMPO, UVHC, Campus Mont Houy, 59313 Valenciennes Cedex 9, France.
    Pálsson, H.
    University of Iceland, Sæmundargötu 2, Reykjavík 101, Iceland.
    Lalot, S.
    EMPO, UVHC, Campus Mont Houy, Valenciennes Cedex 9, France.
    Choquet, Isabelle
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Bauduin, H.
    EMPO, UVHC, Campus Mont Houy, Valenciennes Cedex 9, France.
    Fundamental mode of freely decaying laminar swirling flows2016In: Applied Mathematical Modelling, ISSN 0307-904X, E-ISSN 1872-8480, Vol. 40, no 13-14, p. 6218-6233Article in journal (Refereed)
    Abstract [en]

    Abstract A detailed study of a swirling flow in a tube is presented in the first part of the paper. A simplified analytical solution of the governing equations indicates specific modes of the tangential velocity and that the decay of the swirl effect is exponential. The problem is then solved in three dimensions using computational fluid dynamics (CFD) and a comparison with analytical expressions shows that the CFD code is reliable in terms of accuracy. The CFD results confirm that a fundamental swirling mode is reached within a short distance from the inlet. The torque swirl number is introduced to physically estimate the intensity of the swirl. A companion value is given: it is the average deviation.

  • 38.
    Beno, Tomas
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Isaksson, Marina
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Pejryd, Lars
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Investigation of Minimal Quantity Cooling Lubrication in Turning of Inconel 7182007In: Proceedings of the 3rd International Conference on Tribology in Manufacturing Processes: ICTMP 2007, Yokohama, Japan 24-26 September, 2007, p. 281-286Conference paper (Other academic)
  • 39.
    Beno, Tomas
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Isaksson, Marina
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Pejryd, Lars
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Investigation of Minimal Quantity Lubrication in Turning of Waspalloy2007In: Advances in Life Cycle Engineering for Sustainable Manufacturing Businesses: Proceedings of the 14th CIRP Conference on Life Cycle Engineering, Waseda University, Tokyo, Japan, June 11th-13th, 2007, Springer , 2007, p. 305-310Conference paper (Refereed)
  • 40.
    Berg, Jonas
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Luukkonen, Jarmo
    University West, Department of Technology, Mathematics and Computer Science.
    Method to off-line program robotized metal deposition2007Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    This report is a ten credit degree project and is aimed at technically skilful personnel at Volvo Aero Corporation and at the University West. The goal of the project is to create a robot program that can manufacture a part by Metal Deposition from a 3-D CAD model (Unigraphics) via a CAM module and a CAR program (IGRIP) to an ABB robot. Metal Deposition is a method to build new parts, add material to an existing part and repair components that have been damaged in earlier processes. The method can be used with different kinds of welding with powder or welding wire as the additive material. Three reference geometries were used; two bosses and a circular sweep. UG/CAM is used to create the CLS (Cutter Location Source) data. Different milling operations are used to emulate welding.The program which imports the coordinates from the CLS data to IGRIP, as well as the export program, was written in GSL (Graphics Simulation Language). GSL is a Pascal-like programming language used to control the behaviour of simulation models. The import program reads linear movement coordinates line by line until the whole CLS file has been converted into IGRIP. UG/CAM should only use linear movement when using this program. If circular movements are used, a feature that converts those has to be added to the import program.

  • 41.
    Bergkvist, Per
    University West, Department of Technology, Mathematics and Computer Science.
    Seam tracking in a complex aerospace component for laser welding2004Independent thesis Advanced level (degree of Master (One Year))Student thesis
  • 42.
    Berntsson, Hanna
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Halldin, Josefin
    University West, Department of Technology, Mathematics and Computer Science.
    Ägarlägenheter på Öckerö: erfarenheter kring förvaltningsfrågor2012Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    I Sverige har det sedan maj 2009 varit tillåtet att bilda ägarlägenheter. En ägarlägenhet är en typ av fastighet som är avgränsad både horisontellt och vertikalt och avsedd att innehålla endast en bostadslägenhet. Ägarlägenheten ägs som vilken fastighet som helst och kan därmed fritt hyras ut, pantsättas, belånas och överlåtas.Några av de första att satsa på den nya bostadsformen var det kommunala bostadsbolaget på Öckerö, Öckerö Bostads AB. Bolaget startade 2009 projekteringen av ett nytt bostadsområde som omfattades av 5 huskroppar om totalt 50 ägarlägenheter på Breviksängar. Öckerö Bostads AB styckade av 50 ägarlägenheter varav de sålde 30 av lägenheterna och behöll 20 lägenheter för uthyrning. Det är kombinationen bolagsägande och privat ägande men också hur förvaltningen har fungerat som har undersökts och analyserats. Både lekmannaperspektivet och fackmannaperspektivet har belysts.En anledning till att bolaget valde att sälja 30 av de 50 ägarlägenheterna var för att bolaget ville delfinansiera de 20 hyreslägenheterna och på så sätt hålla hyresnivån för en nyproducerad lägenhet på en rimlig nivå. Att hyresrätterna delfinansieras med försäljning av ägarlägenheter leder till att bostadsbolaget kan erbjuda hyresgästerna en lägre hyra jämfört med om hela projektet hade varit hyresrätterBlandningen av hyresrätter och ägarlägenheter upplevs av de flesta som positiv. Vissa av ägarlägenheternas ägare anser dock att hyresgästerna inte är lika rädda om området som ägarlägenhetsägarna. Ser man till de grannelagsrättsliga reglerna är det däremot mer säkert att bo bredvid en hyresgäst än att bo bredvid en ägarlägenhetsägare eftersom en hyresgäst kan avhysas om denne orsakar störningar i boendet medan en ägarlägenhetsägare inte kan avhysas även om denne orsakar störningar.Öckerö Bostads AB hade också en integrationstanke om att blanda olika typer av människor och familjekonstellationer på Breviksängar, därför blandades hyresrätter och ägarlägenheter i samtliga hus, detta är dock svårt att införliva på Öckerö på grund av att hyrorna och kostnaden för en ägarlägenhet fortfarande är relativt höga.Samfälligheter och gemensamhetsanläggningar bildades för att tillgodose ägarlägenheternas gemensamma behov. Alla ägarlägenheternas ägare, både privata ägare och bostadsbolaget, ingår i Norra Breviks samfällighetsförening som förvaltar samfälligheterna och gemensamhetsanläggningarna. Denna gemensamma förvaltning upplevs till stor del ha fungerat bra. Att Öckerö Bostads AB representeras i styrelsen är bra dels för att bolaget representerar hyresgästerna, men också för att Öckerö Bostads AB har kunskap om fastighetsförvaltning. Det finns dock ägarlägenhetsägare som anser att Öckerö Bostads AB inte skall vara med i styrelsen.Bland de som äger sina ägarlägenheter har det uppstått oklarheter från kring bolagets olika roller. En gränsdragning mellan bolagets roll som byggherre och bolagets roll som fastighetsägare bör vara tydligare för att undvika missförstånd, speciellt viktigt är det innan garantitidens utgång för att inte blanda ihop byggherrefrågor och föreningsfrågor.

  • 43.
    Bertilsson, Maria
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Ståhle, Karl-Wilhelm
    University West, Department of Technology, Mathematics and Computer Science.
    Mätutrusting för luftinblandning i motorolja: utredning och korrigering2004Independent thesis Advanced level (professional degree)Student thesis
  • 44.
    Bjarneskär, Anneli
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Eriksson, Eva
    University West, Department of Technology, Mathematics and Computer Science.
    GPS: Nätverks-RTK eller RTK med Fast referensstation i Vänersborgs kommun2003Independent thesis Advanced level (professional degree)Student thesis
  • 45.
    Bjelke, Katarina
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Pettersson, Monica
    University West, Department of Technology, Mathematics and Computer Science.
    Miljöutredning av verksamheten på Hästeskedsmossens avfallsanläggning i Munkedal2004Independent thesis Advanced level (professional degree)Student thesis
  • 46.
    Björk, Terese
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Olsson, Johan
    University West, Department of Technology, Mathematics and Computer Science.
    Automotive pedestrian protection: application of radar-based sensors in order to detect humans in front of cars2004Independent thesis Advanced level (professional degree)Student thesis
  • 47.
    Björkholdt, Elise
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Lundström, Patrik
    University West, Department of Technology, Mathematics and Computer Science.
    Generalizations of the normal basis theorem2004In: Mathematica Scandinavica, ISSN 0025-5521, E-ISSN 1903-1807, Vol. 94, p. 5p. 185-190Article in journal (Refereed)
  • 48.
    Björkman, Inger
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Johansson, Ann
    University West, Department of Economics and Informatics.
    Implications of IT in Different Professions2006In: Information Technology: New Generations, 2006. ITNG 2006. Third International Conference on10-12 April 2006, 2006, p. 11-19Conference paper (Other academic)
    Abstract [en]

    Development of information systems and IT are continuously ongoing in almost every company and organisation. More and more IT development is performed in organisations characterised by professional work. Two studies are performed to point out two types of professions. One study is carried out at an airbase within the Swedish Air Force and one study is done in a health care organisation in Sweden. The aim of this paper is to describe and analyse the different types of professional work in these organisations. Some implications of the use of IT in different types of professional work are addressed

  • 49.
    Björkman, Peter
    University West, Department of Technology, Mathematics and Computer Science.
    Vilka möjligheter uppstår vid kombinationen visionsystem - "touch screen" panel2004Independent thesis Advanced level (professional degree)Student thesis
  • 50.
    Boklund, Andreas
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Assessing Lectures, a case Study on the Student’s Perception2006In: Shifting perspectives in engineering education, Göteborg: Chalmers Tekniska Högskola , 2006, p. 96-103Chapter in book (Other academic)
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