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  • Birgerson, Jonas, 1969- (författare)
  • A study of devices and materials for polymer based LEDs
  • 2000
  • Licentiatavhandling (övrigt vetenskapligt)abstract
    • Since the discovery that it is possible to dope conjugated polymers into high electrical conductivity the research in the field of conjugated polymers has increased a lot. Much of the research activity has been concentrated to the design and fabrication of light emitting devices. The performance of a device is affected by a large number of different parameters, such as the choice of charge injecting metals and what type of polymer is used. In this work we have studied the effect of a low workfunction electrode metal in a device and the effect of using a polymer blend as active material. We have also studied the electronic and chemical structure of some polymers designed for electron transport.
  • Ayas, Ebru, 1977- (författare)
  • Engineering Feelings of Quality
  • 2008
  • Licentiatavhandling (övrigt vetenskapligt)abstract
    • There is an increasing emphasis on developing systematical research approaches for design of products that appeal to people’s emotions and values. This thesis proposes methodological developments for investigating people’s subjective emotional needs and values towards quality and explores interactions of related physical design attributes for product design.The overall aim of the licentiate thesis is to gain an understanding on Affective engineering of products through exploring the concept of quality feeling and to develop methodological approaches for this. Quality feeling can be described as a holistic concept considering individuals’ perceptions, expectations, experiences, physical and psychological expressions for a product or service. Affective Engineering methodology aims at translating human psychological processes, such as feelings and emotions, into appropriate product design attributes, such as size, shape, and surface characteristics.The thesis presents three methodological approaches when evaluating products for affective engineering and one approach for an interactive product design support system development.The first study presented deals with feelings of quality for reach truck operator’s cabin components. Components that would convey to give a higher total quality feeling were identified and improvement opportunities were prioritized. The second study presented is based on developing an interactive affective design and decision support system software for design of the steering wheel from drivers’ individual and shared preferences. In the third study affective values arising from judgments for important feelings of quality is the study basis. The author presents research on identifying interactions of design attributes for affective values in waiting areas of primary health care services.Further, a new approach for applying Affective Engineering in design of complex contexts is proposed.The proposed approach aims to handle contexts where feelings and design attributes have complex interactions for products and services that give almost an infinite number of design alternatives that are difficult to handle in traditional Kansei Engineering studies. With this thesis also an interactive product design and decision support system software is developed for steering wheel design and proposed for educational and industrial use. The proposed system works based on linking product design attributes to human feelings by applying Genetic algorithms and provides potential basis for future product development and improvements.This thesis has also contributed with affective design recommendations applicable for vehicle cabins and waiting areas in primary health care. Moreover, a number of existing methods in Affective Engineering have been tested and methodological experience is drawn, including advantages, disadvantages and limitations of using these methods.
  • Olstam, Johan, 1979- (författare)
  • A model for simulation and generation of surrounding vehicles in driving simulators
  • 2005
  • Licentiatavhandling (övrigt vetenskapligt)abstract
    • Driving simulators are used to conduct experiments on for example driver behavior, road design, and vehicle characteristics. The results of the experiments often depend on the traffic conditions. One example is the evaluation of cellular phones and how they affect driving behavior. It is clear that the ability to use phones when driving depends on traffic intensity and composition, and that realistic experiments in driving simulators therefore has to include surrounding traffic.This thesis describes a model that generates and simulates surrounding vehicles for a driving simulator. The proposed model generates a traffic stream, corresponding to a given target flow and simulates realistic interactions between vehicles. The model is built on established techniques for time-driven microscopic simulation of traffic and uses an approach of only simulating the closest neighborhood of the driving simulator vehicle. In our model this closest neighborhood is divided into one inner region and two outer regions. Vehicles in the inner region are simulated according to advanced behavioral models while vehicles in the outer regions are updated according to a less time-consuming model. The presented work includes a new framework for generating and simulating vehicles within a moving area. It also includes the development of enhanced models for car-following and overtaking and a simple mesoscopic traffic model.The developed model has been integrated and tested within the VTI Driving simulator III. A driving simulator experiment has been performed in order to check if the participants observe the behavior of the simulated vehicles as realistic or not. The results were promising but they also indicated that enhancements could be made. The model has also been validated on the number of vehicles that catches up with the driving simulator vehicle and vice versa. The agreement is good for active and passive catch-ups on rural roads and for passive catch-ups on freeways, but less good for active catch-ups on freeways.
  • Karltun, Johan (författare)
  • Förändringsprocessers egenskaper och utvärdering
  • 1996
  • Licentiatavhandling (övrigt vetenskapligt)abstract
    • Utgångspunkten i denna avhandling är att det är möjligt att med en väl utformad förändringsprocess, kunna skapa förutsättningar för både goda arbeten och en stärkt konkurrenskraft i framför allt mindre träindustrier. Tre fallstudier är genomförda, och förändringsprocesserna är i dessa fall utvärderade med syftet att skapa en bättre kunskap om hur en effektiv förändringsprocess kan utformas och styras. Vidare föreslås en metodik för att utvärdera förändringsprocesser. Företagens förmåga att använda sig av metodiskt arbete, att kunna omsätta problemlösningar till praktisk handling, enigt och entydigt ledarskapsstöd och de anställdas medverkan identifieras som viktiga faktorer för en effektiv förändringsprocess. För att uppnå fysiska arbetsmiljöförbättringar och engagemang har framför allt de anställdas medverkan och ett tillräckligt ekonomiskt handlingsutrymme stor betydelse. I förändringsarbetet har två olika typer av förändringsprocesser som inverkar på konkurrenskraft och arbetsförhållanden identifierats. Den ena avser förändringar inom gällande mål och visioner, och den är framför allt åtgärdsinriktad. Denna förändringstyp har karaktären av vardagsrationalisering, och förutsätter ofta en förbättring av arbetsförhållandena för att den ska fungera effektivt. Den har en god förmåga att framför allt ge fysiska arbetsmiljöförbättringar. Den andra typen av förändring drivs av en vision och konkretiserade mål, och kräver en helt annan planering och organisation för sitt genomförande. För att denna process ska resultera i förbättrade arbetsförhållanden krävs medvetet angivna mål som inbegriper ett så-dant syfte. Resultaten visar också att en förändringsprocess behöver utvärderas ur flera perspektiv för att man ska få en acceptabelt bra bild av hur den ska kunna styras.
  • Winroth, Mats (författare)
  • On Manufacturing Strategies : Implementation and utilization at some Swedish manufacturing industries
  • 2001
  • Licentiatavhandling (övrigt vetenskapligt)abstract
    • This thesis discusses the issue of manufacturing strategies. Many articles and books on this matter have been published during the last 30 years, the majority being focused on American or British companies. Research on the formulation and implicationof manufacturing strategies in Swedish companies, however, is limited. This thesis focuses on findings from two large-scale Swedish companies, Saab Automobile AB and Ericsson Mobile Communications AB, known for their work on manufacturingstrategies, and from 62 medium sized enterprises. The main objectives of the manufacturing system are to manufacture products that satisfy the customer as well as to give the manufacturer a good return on investment. The studies show that manufacturing strategies play an important role in these efforts and they always form the base for the specification of the manufacturing system. Furthermore, the studies show that SAAB and Ericsson work actively with manufacturing strategies. The most important factors vary, but quality, cost, delivery precision and, concerning consumer products, Time To Market (TTM) are always considered essential to the success of the company. It is also essential that the top management ofthe company recognize this importance of the strategies. Strategies are not directly used in the daily work, but the personnel work towards short-term, easily comprehensible,targets that are derived from the manufacturing strategies.To get a wider view of the situation in Swedish industry, a survey among a large number of medium sized enterprises was performed. The result showed that also these companies work with strategies, however, not as systematically as Saab and Ericsson and the strategies are not always documented and implemented. The most valued competitive priorities were quality and delivery precision/reliability. It was also shown that a majority of these companies had certified quality management or environmental management systems.
  • Miciol, Frank-Gilles, 1958- (författare)
  • Hur kulturen påverkar Svensk-Franska affärsrelationer : En studie av gemensamma industriella projekt mellan SAAB Aerospace i Linköping och Dassault Aviation i Paris
  • 2013
  • Licentiatavhandling (övrigt vetenskapligt)abstract
    • Globaliseringen av affärsrelationer har lett till att individer och företag med olika kulturell bakgrund möts i en mycket större utsträckning än vad som skedde för några decennier sedan. Svenska och franska företag dras med i den globala strömmen: de gemensamma affärsrelationerna, bilaterala projekten och mötena blir alltmer omfattande och intensivare, vilket också innebär att de kulturella skillnaderna mellan nationaliteterna blir kännbara, och de orsakar både problem och möjligheter.Det aktuella forskningsprojektet syftar till att utreda vad som kännetecknar den svenska respektive den franska affärskulturen, samt att studera vilka skillnader i dessa kulturer som påverkar gemensamma samarbetsprocesser. Studien baseras på flera fall av industriella projekt mellan SAAB Aerospace i Linköping och Dassault Aviation i Paris, där flygingenjörer utvecklar högteknologiska produkter.Två olika världar. Studien visar att svenskar respektive fransmän utvecklas i två olika världar. Även om de studerade företagen och deras ingenjörer delar samma tekniska kultur, driver de sina projekt på olika sätt, och skillnaderna kommer till uttryck ofta i samband med gemensamma beslutsprocesser, med tids- och energislukande missförstånd som följd. Besluten tas på olika nivåer, på olika sätt, vid olika tidpunkter och har olika betydelse och bindningskraft om man är i Sverige eller i Frankrike.Olikheter betyder också möjligheter. Man skall dock inte alltid betrakta dessa skillnader som ett problem. En ökad förståelse för varandras mentalitet kan leda dels till att krockar undviks, och att man kan dra fördel av skillnaderna på ett konstruktivt sätt. Den aktuella studien visar att den franska retoriska seden är väl anpassad för att hantera abstrakta frågor samt för att främja innovation. De mer konsensuella svenskarna i sin tur är svårslagna när det gäller medarbetares involvering, samt för att förverkliga idéer och visioner. Olikheter mellan den franska respektive den svenska kulturen kan då komplettera varandra och leda till synergier som kan gagna båda parterna, för ett framgångsrikt samarbete bortom våra gränser.
  • Persson, Sofia, 1984- (författare)
  • Collaborative development of resource efficient district heating in Sweden
  • 2013
  • Licentiatavhandling (övrigt vetenskapligt)abstract
    • An increased recovery of excess heat from industrial processes and thermal power generation could significantly reduce energy demands. Industrial excess heat-based district heating systems are generally considered resource efficient because they reduce the use of fossil fuels and the emissions of greenhouse gases. In addition, collaborating actors can gain financial benefits.In Sweden, although collaboration around heat supply has increased recently, the amount of excess heat that is utilized is low compared to the amount created by industrial processes. Using excess-heat recovery in district heating grids is currently one of the most cost-effective ways of providing additional heat to district heating systems.Expansion and new construction of district heating systems in new residential areas can be seen as an opportunity to further use industrial excess heat. Sweden’s local authorities can influence the development of energy systems used for new residential developments. Increased knowledge about how collaborations evolve could be used to develop strategies that could encourage the development of excess heat-based systems for district heating.This licentiate thesis examines the role of organisational collaboration when it comes to the emergence of resource efficient district heating. The thesis summarises results from three articles and investigates the preconditions for, drivers behind, and barriers to the development of excess heat-based systems for district heating in Sweden. These investigations focus on both the district heating companies’ and industries’ points of view. The thesis also discusses how Swedish spatial planning practice could improve the conditions for resource efficient district heating.Important preconditions for excess-heat collaborations to develop, from the actors’ points of view, are mainly financial. However, relationships based on trust, honesty, shared goals, information transfer, and joint problem solving are also necessary for such collaborations to evolve and develop into long-term successful excess-heat collaborations. These features are also important when it comes to the decision-making process, because knowledge gained through the participation of stakeholders is required to understand common goals and objectives and to put these into practice.As for the development of new excess heat-based district heating systems, results show that the district heating companies generally participate late in the spatial planning process. An earlier dialogue between local authority planners and district heating companies could facilitate the emergence and development of new excess heat-based district heating systems. Furthermore, to facilitate the use of excess heat-based systems, planning should also take into account any nearby industry that produces excess heat. In addition, investment subsidies could encourage the development of excess heat-based systems for district heating and provide long-term environmental benefits for collaborating actors as well as for society at large.
  • Alenljung, Beatrice (författare)
  • Decision-making in the Requirements Engineering Process : A Human-centred Approach
  • 2005
  • Licentiatavhandling (övrigt vetenskapligt)abstract
    • Complex decision-making is a prominent aspect of requirements engineering and the need for improved decision support for requirements engineers has been identified by a number of authors. A first step toward better decision support in requirements engineering is to understand decision-makers’ complex decision situations. To gain a holistic perspective of the decision situation from a decision-makers perspective, a decision situation framework has been created. The framework evolved through a literature analysis of decision support systems and decision-making theories. The decision situation of requirements engineers has been studied at Ericsson Microwave Systems and is described in this thesis. Aspects of decision situations are decision matters, decision-making activities, and decision processes. Another aspect of decision situations is the factors that affect the decision-maker. A number of interrelated factors have been identified. Each factor consists of problems and these are related to decision-making theories. The consequences of this for requirements engineering decision support, represented as a list that consists of desirable high-level characteristics, are also discussed.
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