Change search
Refine search result
1234567 1 - 50 of 3373
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Aarts, Mariëlle P. J.
    et al.
    Building Physics and Services, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, the Netherlands.
    Aries, Myriam
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science. Jönköping University, School of Engineering, JTH. Research area Built Environment. Building Physics and Services, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, the Netherlands.
    Diakoumis, Adonia
    Building Physics and Services, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, the Netherlands.
    van Hoof, Joost
    Fontys EGT—Centre for Healthcare and Technology, Fontys University of Applied Sciences, Eindhoven, the Netherlands.
    Shedding a light on phototherapy studies with people having dementia: A critical review of the methodology from a light perspective2016In: American Journal of Alzheimer’s Disease and Other Dementia, ISSN 1533-3175, E-ISSN 1938-2731, Vol. 31, no 7, p. 551-563Article in journal (Refereed)
    Abstract [en]

    Light therapy is applied to older people with dementia as a treatment to reset the biological clock, to improve the cognitive functioning, and to reduce behavioral symptoms. Although the methodological quality of light therapy studies is essential, many aspects concerning the description of the lighting applied are missing. This study reviewed light therapy studies concerning the effects on people with dementia as a way to check the methodological quality of the description of light from a light engineering perspective. Twelve studies meeting the inclusion criteria were chosen for further analysis. Each study was scored on a list of aspects relevant to a proper description of lighting aspects. The overview demonstrates that the overall quality of the methodologies is poor. The studies describe the lighting insufficiently and not in the correct metrics. The robustness of light therapy studies can be improved by involving a light engineer or specialist.

  • 2.
    Aarts, Mariëlle P. J.
    et al.
    Department of the Built Environment, Eindhoven University of Technology, Eindhoven, Netherlands.
    Aries, Myriam
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science. Department of the Built Environment, Eindhoven University of Technology, Eindhoven, Netherlands.
    Straathof, Jochem
    Department of the Built Environment, Eindhoven University of Technology, Eindhoven, Netherlands.
    van Hoof, Joost
    Centre for Healthcare and Technology, Fontys University of Applied Sciences, Eindhoven, Netherlands.
    Dynamic lighting systems in psychogeriatric care facilities in the Netherlands: A quantitative and qualitative analysis of stakeholders’ responses and applied technology2015In: Indoor + Built Environment, ISSN 1420-326X, E-ISSN 1423-0070, Vol. 24, no 5, p. 617-630Article in journal (Refereed)
    Abstract [en]

    Long-term care facilities are currently installing dynamic lighting systems with the aim to improve the well-being and behaviour of residents with dementia. The aim of this study was to investigate the implementation of dynamic lighting systems from the perspective of stakeholders and the performance of the technology. Therefore, a questionnaire survey was conducted with the management and care professionals of six care facilities. Moreover, light measurements were conducted in order to describe the exposure of residents to lighting. The results showed that the main reason for purchasing dynamic lighting systems lied in the assumption that the well-being and day/night rhythmicity of residents could be improved. The majority of care professionals were not aware of the reasons why dynamic lighting systems were installed. Despite positive subjective ratings of the dynamic lighting systems, no data were collected by the organizations to evaluate the effectiveness of the lighting. Although the care professionals stated that they did not see any large positive effects of the dynamic lighting systems on the residents and their own work situation, the majority appreciated the dynamic lighting systems more than the old situation. The light values measured in the care facilities did not exceed the minimum threshold values reported in the literature. Therefore, it seems illogical that the dynamic lighting systems installed in the researched care facilities will have any positive health effects.

  • 3.
    Aarts, Mariëlle P.J.
    et al.
    Eindhoven University of Technology, Eindhoven, The Netherlands.
    van Duijnhoven, Juliëtte
    Eindhoven University of Technology, Eindhoven, The Netherlands.
    Aries, Myriam B. C.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science. Eindhoven University of Technology, Eindhoven, The Netherlands.
    Rosemann, Alexander L.P.
    Eindhoven University of Technology, Eindhoven, The Netherlands.
    Performance of personally worn dosimeters to study non-image forming effects of light: Assessment methods2017In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 117, p. 60-72Article in journal (Refereed)
    Abstract [en]

    When determining the effects of light on human beings, it is essential to correctly measure the effects, and to correctly measure the adequate properties of light. Therefore, it is important to know what is being measured and know the quality of the measurement devices. This paper describes simple methods for identifying three quality indices; the directional response index, the linearity index and the temperature index. These indices are also checked for several commonly used portable light measurement devices. The results stresses what was already assumed, the quality and the outcome of these devices under different circumstances were very different. Also, the location were these devices are normally worn has an impact on the results. The deviation range between worn vertically at eye level and the wrist is between 11% (outdoor) to 27% (indoor). The smallest deviation, both in indoor and outdoor, was found when the device was placed on the sides of the eye (7%). 

  • 4.
    Abbaraju, Nanda
    Jönköping University, School of Engineering.
    Sending and Receiving Data between Mobile and Data Logger2008Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
  • 5.
    Abdollahifakhr, Hamon
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    Sengul, Ceyhun
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    AUTOMATIC DESIGN OF WIRING PATTERN FOR CAR SEAT HEATERS2010Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This projects aims to develop design automation in product development. Design automation causes increase in producibility and decrease in product cost and manufacturing lead time.

    The study at hand is proposed to provide a new method and to introduce procedure to the design of wiring pattern for a car seat heater for Kongsberg Automotive, KA. KA is a Norwegian company and a global provider of engineering, design, and manufacture for seat comfort, driver and motion control systems, fluid assemblies, and industrial driver interface products. The method that currently is used in the company to create a wiring pattern is neither sufficient enough nor automated.

    In order to design the wiring pattern, at first procedure is handled by the designer. Secondly, car seat heater 2D layout is imported and then, the dimensions of the elements are defined as constraints. Then VBA codes are opened and the program is run. The result will be a wiring pattern in different 2D layouts. To make the design process easier, we have modeled five different layouts; wiring pattern of one element, two elements, three elements, five elements (with two back sides) and one element trapezoidal 2D layout.

    The algorithm written in VBA (Visual basic for application) creates the pattern according to the dimensions of the elements which are used as inputs to define constrained parameters. The created macros are simple to use and easy to modify, independent from the programming knowledge. The user is only responsible with parameter input and running the program. The solution gives wiring pattern for a car seat heater.

  • 6.
    Abdulameer, Hasanain
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Chamoun, Kristian
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    BIM i små och medelstora anläggningsföretag.2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: The purpose of this bachelor thesis is to improve the usage of BIM in facility projects.

    Method: The methods used for this bachelor thesis are qualitative interviews and literature studies.

    Findings: Free programs will be available for usage where models can be opened, viewed, examined and studied. The small and medium-sized facility companies will not be forced to use resources to cope with the requirements of Trafikverket.

    Implications: Consequences are that the small and medium-sized civil engineering companies understand and follow the requirements.

    • Using more 3D models to gain more experience and skills in the subject.

    • Attend the Trafikverkets industry days when opportunities arise, the authors believe that it was very instructive.

    • Engage in more BIM projects.

    • Older projects where the drawings are in 2D is converted into 3D.

     

    Limitations: How BIM is used during the management process will not be covered.

    Keywords: Productivity, resource, competence, experience, BIM.

  • 7.
    Abdullah, Asim
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Study on Compositionality of Terms in Biomedical Events Ontologies2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    An ontology is an explicit specification of conceptualization which intended to capture and formalize the domain knowledge. The ontologies that formalize knowledge about life sciences are biomedical ontologies. The biomedical ontologies are consisted of concepts (are central units of description) which are used for unambiguous and consistent naming of biomedical data and events. The events refer the tasks, providing descriptions of actions among one or more entities in biomedical domain.

     

    The purpose of study is to understand how the terms are composed in biomedical event ontologies. What are the term patterns exist between biomedical terms? How to represent these term patterns? How to categorize according to part-of-speech? The most important is the identification of primary and secondary events in biomedical event ontology terms and their location in biomedical terms patters.

     

    The proposed method produces Finite State Machine explained in the results chapter 4. The FSM identify the primary event e.g. last token of biomedical term and secondary event is immediately followed by preposition in biomedical term. The FSM is a computation model which is used to design for computer programs. FSM is an abstract machine which can be easily programmed and thus is a step towards automatic event extraction which will further lead us to develop the domain specific application, e.g. semantic search, event database curation support, event extraction and event annotations.

     

    For our study, we selected Gene Ontology (GO). The GO provides ontologies of gene products in three separate domains (i) Cellular components (ii) Molecular functions (iii) Biomedical process for our thesis we have selected biomedical process. For the compositional and structural analysis, a biomedical term is broken down into words, and each word is called as “token”. This process is called tokenization of terms. The tokens are categorized according to natural language grammar such as noun, adjectives, preposition, relational adjectives, etc.

    After categorization of tokens on the basis of POS tagging, and the conversion into abbreviation form the resulting form is called as a biomedical term pattern. After collecting the sample of biomedical term patterns we generalized these term patterns and built Finite State Machines.

     

    The research proposed Finite State Machine which provide abstract and concise view of the structure and composition of biomedical terms in biomedical event ontologies. Finite State Machine helps in identification of biomedical events (primary and secondary) in biomedical terms and their possible locations. These Finite State Machines can be used to build computer programs. The computer program will help in building domain specific application e.g. biomedical event corpus, annotation for biomedical event terms, etc.

     

    The results (and evaluation of results) represent that FSMs are the generalized solution to explain the structure of biomedical terms, can identify the events and their locations in biomedical event ontologies.

  • 8.
    Abghari, Shahrooz
    et al.
    Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik.
    García Martín, Eva
    Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik.
    Johansson, Christian
    NODA Intelligent Systems AB, Sweden.
    Lavesson, Niklas
    Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik.
    Grahn, Håkan
    Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik.
    Trend analysis to automatically identify heat program changes2017In: Energy Procedia, Elsevier, 2017, p. 407-415Conference paper (Refereed)
    Abstract [en]

    The aim of this study is to improve the monitoring and controlling of heating systems located at customer buildings through the use of a decision support system. To achieve this, the proposed system applies a two-step classifier to detect manual changes of the temperature of the heating system. We apply data from the Swedish company NODA, active in energy optimization and services for energy efficiency, to train and test the suggested system. The decision support system is evaluated through an experiment and the results are validated by experts at NODA. The results show that the decision support system can detect changes within three days after their occurrence and only by considering daily average measurements.

  • 9.
    Abid, Muhammad
    et al.
    Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Özkan, Senol
    Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    The Relation between Lean Manufacturing & Customer's Demand Uncertainty2009Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Customer Demand Uncertainty is a big obstacle for companies to sustain their competitiveness in the market that responding customer requirements becomes essential. Besides companies need to consider also their cost structures which should have in high consistency to survive as well. Lean and Agile terminologies have been investigated so far in cost and responsiveness to customer manner within internal system perspective i.e. product volume and variety. This thesis aims to link lean manufacturing steps with customer demand uncertainty condition following information systems, marketing issues and human factor for management level in framework that firm’s (manufacturer) current condition can be tested according to answers from questionnaires and implementation of assessment tables since it is used as guideline and provides on which level firms are in demand uncertainty, lean and agile manufacturing. This support enables to firms to create their own flexible leagile decoupling point according to their interior characteristics and capabilities in the market.

  • 10.
    Abolhosseini, Shahrouz
    et al.
    Petr Univ Technol, Natl Iranian Oil Co, Int Affairs, Tehran, Iran.
    Heshmati, Almas
    Jönköping University, Jönköping International Business School, JIBS, Economics. Sogang Univ, Seoul, South Korea.
    Rashidghalam, Masoomeh
    Univ Tabriz, Tabriz, Iran.
    Energy security and competition over energy resources in Iran and Caucasus region2017In: AIMS Energy, ISSN 2333-8326, E-ISSN 2333-8334, Vol. 5, no 2, p. 224-238Article in journal (Refereed)
    Abstract [en]

    Energy security as a dominant factor in international stability is of great importance for major economies. The global energy market with its current level of supply and demand relies on energy sources in the Middle East, Caucasus, Central Asia and Russia. After the Fukushima disaster nuclear powers in Europe view renewable energy sources as a serious alternative. Europe’s energy vulnerability has deteriorated due to the Russia-Ukraine conflict. However, renewable energy sources are not large enough to replace nuclear power completely. This trend will continue with climbing demand especially in the natural gas sector as clean energy. In this research, Caucasus and Iran are considered the main sources and routes for energy transmission to the global market, including Europe. Caucasus plays a key role in bridging Europe and Asia. Also, Iran is an alternative for energy transmission to Europe after lifted sanctions. As part of the European active supply diversification policy Iran has capacity to reduce Europe’s energy dependency on Russia. However, changes in US new administration America First Policy is harmful for the EUs energy security. Caucasus aims to catch a large share of the European energy market since the Baku-Tbilisi-Ceyhan pipeline has started operations and Iran is also trying to expand its market to become a sustainable source of energy for major consumers. Therefore, Iran and Caucasus are considered reliable energy suppliers for Europe. In this regard, we analyze the best motivation for changing the direction new suppliers’ energy policies towards Europe and suggest alternative solutions to compete with rival countries in order to enhance energy security.

  • 11.
    Abrahamsson, Josef
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Karlsson, Mikael
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Bullerbegränsande åtgärder för byggnation nära befintlig väg2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: When cities grow at a faster rate, new places are needed to build housing.The municipalities that are growing tends to choose build sites that previously wererejected due to noise pollution. There are requirements from the state that the noise maynot exceed certain values. The requirements originate from the fact that over twomillion swedes are exposed to noise daily. Noise can lead to health problems, in theform of sleep disorders and cardiovascular disease. To reduce health problems noiseinvestigations are made, where suggestions are made in how noise levels can bereduced. The purpose of the work is to provide the reader with knowledge of whichfactors influence noise investigations and the approach to the choice of noise reductionmeasures so that construction can be made closer to trafficked roads.

    Method: The methods used are literature studies, document analysis and interviews.The literature gathered consists of scientific articles. The documents consist of noiseinvestigations conducted by different companies all over Sweden. Persons to interviewwere chosen from the conductors of the noise investigations documents.

    Findings: To answer the report's purpose, three questions were raised. The firstquestion deals with noise-reducing technologies and which technologies are used today.The report found that there are several ways to reduce noise. In the following order, themost frequently used are: silent facade, noise screen, speed reduction, distance betweenhouse and roads, vegetation, road moving and quiet asphalt. The second question of thereport addresses the factors that influence the choice of noise reduction measure. Fromthe literature study, absorption, reflection and reduction were found to be importantfactors. In the document analysis, surroundings, traffic and speed emerged as importantfactors. In the interviews, aesthetics and price emerged as important in the choice ofwhich reducing action should be taken. The third question deals with the question ofhow construction can be made closer to the road. In the result it appears that all of thesolutions mentioned earlier have the ability to reduce noise, but how effective they areand how well they reduce noise varies from case to case. Surroundings and trafficvolume are of great importance.

    Implications: Making use of the technical solutions previously described, results in areduced noise level and there for construction near road can be made possible.Executing a noise investigation at an early stage means that later and more expensivechanges can be avoided, which means that construction can take place sooner. Thereport suggests therefore that noise issues should be considered early in projects. It isalso important to get a solution that everyone can accept.

    Limitations: The report's results are limited to a smaller selection of noiseinvestigations and interviews. More investigations and interviews could hadcontributed to a larger spectrum. The report does only consider noise outdoors and whatopportunities for noise reduction there are.

  • 12.
    Abubakr, Raowa
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Patel, Pooja
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Packaging systems decision makin; to assure cost efficient transports2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 13.
    Acheampong, Faustina
    et al.
    Jönköping University, Jönköping International Business School, JIBS, Business Informatics.
    Vimarlund, Vivian
    Jönköping University, Jönköping International Business School, JIBS, Business Informatics.
    Handheld Electrocardiogram: Does ICT Contribute to Innovation in Healthcare Delivery?2012In: Proceedings of the IADIS international conference E-health 2012: part of the IADIS multi conference on Computer Science  and Information Systems / [ed] Mário Macedo, IADIS Press, 2012, p. 77-84Conference paper (Refereed)
  • 14.
    Adamsson, Mathias
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Laike, Thorbjörn
    Department of Architecture and Built Environment, Lund University, Lund, Sweden.
    Morita, Takeshi
    Department of Environmental Science, Fukuoka Women’s University, Higashi-Ku, Fukuoka, Japan.
    Comparison of Static and Ambulatory Measurements of Illuminance and Spectral Composition That Can Be Used for Assessing Light Exposure in Real Working Environments2018In: LEUKOS The Journal of the Illuminating Engineering Society of North America, ISSN 1550-2724, E-ISSN 1550-2716, p. 1-14Article in journal (Refereed)
    Abstract [en]

    Reliable measurements are of utmost importance when investigating the relationship between light and human reactions. The aim of the present study was to compare two methods for measuring light exposure in real working environments. Ambulatory recordings of illuminance and irradiance were compared with static field measurements of horizontal illuminance at the normal working position, average horizontal illuminance in the room, vertical illuminance at the position of the eye in the normal angle of gaze, and spectral composition of the light radiation at the normal working position and at the position of the eye in the normal angle of gaze. The ambulatory measurements were carried out during a 3-day experimental period and were repeated monthly throughout the year. The static field measurements in the subjects’ offices were conducted five times during the year, in the morning and afternoon during one day. The relationship between the illuminances and irradiances measured with the portable instruments and the static measurements was statistically analyzed. Results from the analyses revealed that more than one third of the static measurements of vertical illuminances recorded were below 200 lx, and only 7% of the measurements exceeded 1000 lx. Measurements of the spectral composition of the light radiation in the rooms suggested that the light, although at a fairly low intensity, included relatively much radiation that can have a non-image forming effect. Furthermore, only a small number of significant correlations between the ambulatory and static measurements were found. Results from the t-tests showed that there were no differences between ambulatory measurements, and static measurements of horizontal illuminance at the normal position, average illuminance in the room and vertical illuminance at the position of the eye during three, five, and seven of the 10 measurements, respectively. There is a need to define appropriate parameters in order to describe the quality of a lit environment with respect to the non-image-forming effects of light radiation.

  • 15.
    Adamsson, Mathias
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Laike, Thorbjörn
    Lund University, Sweden.
    Morita, Takeshi
    Fukuoka Women's University, Fukuoka, Japan.
    Seasonal variation in bright daylight exposure, mood and behavior among a group of office workers in Sweden2018In: Journal of Circadian Rhythms, ISSN 1740-3391, E-ISSN 1740-3391, Vol. 16, article id 2Article in journal (Refereed)
    Abstract [en]

    The purpose of the study was to investigate seasonal variation in mood and behavior among a group of office workers in Sweden (56°N). Thirty subjects participated in this longitudinal study. The subjects kept a weekly log that included questionnaires for ratings of psychological wellbeing and daily sleep-activity diaries where they also noted time spent outdoors. The lighting conditions in the offices were subjectively evaluated during one day, five times over the year. There was a seasonal variation in positive affect and in sleep-activity behavior. Across the year, there was a large variation in the total time spent outdoors in daylight. The subjects reported seasonal variation concerning the pleasantness, variation and strength of the light in the offices and regarding the visibility in the rooms. Finally, the subjects spent most of their time indoors, relying on artificial lighting, which demonstrates the importance of the lighting quality in indoor environments. 

  • 16.
    Adanko, Carina
    et al.
    Jönköping University, School of Engineering, JTH. Research area Built Environment.
    Küller, Marianne
    Lunds universitet, LTH, Inst arkitektur och byggd miljö, Miljöpsykologi.
    LED-belysning och brukaren2014Report (Other academic)
    Abstract [en]

    Lighting research is diversified and includes theory and methodology from disciplines as different as technology, medicine and social sciences. There is also an expectation on research results to be directly applicable in real environments. The introduction of LED has furthermore made previous research on incandescent lamps, fluorescent lamps and other light sources, outdated.    New knowledge – and new research – is needed.

    An inventory of current LED-research was made during 2013. The result of this inventory is the basis of the research review here presented. The presentation includes more than 400 articles, reported under the headings: The biological clock; Flicker and dimming of LED: Energy efficiency: daylight and lighting control; Colour rendering; Glare, and finally; Perceived lighting qualities.

    Underlying theoretical considerations as well as actual knowledge are presented in the text of the different sections, and references are given to relevant research publications. All publications have been provided with two or more keywords in Swedish, describing the content of the publication. After the text given under each heading the references supporting this text are presented. In the final section all LED-publications are given in alphabetical order according to author and with keywords. 

  • 17.
    Adlemo, Anders
    et al.
    Jönköping University, School of Engineering, JTH, Computer Science and Informatics. Jönköping University / School of Engineering.
    Tan, He
    Jönköping University, School of Engineering, JTH, Computer Science and Informatics.
    Tarasov, Vladimir
    Jönköping University, School of Engineering, JTH, Computer Science and Informatics.
    Test case quality as perceived in Sweden2018In: Proceedings - International Conference on Software Engineering / [ed] Michael Unterkalmsteiner, ACM Digital Library, 2018, p. 9-12Conference paper (Refereed)
    Abstract [en]

    In order to reach an acceptable level of confidence in the quality of a software product, testing of the software is paramount. To obtain "good" quality software it is essential to rely on "good" test cases. To define the criteria for what make up for a "good" test case is not a trivial task. Over the past 15 years, a short list of publications have presented criteria for "good" test cases but without ranking them based on their importance. This paper presents a non-exhaustive and non-authoritative tentative list of 15 criteria and a ranking of their relative importance. A number of the criteria come from previous publications but also from discussions with our industrial partners. The ranking is based on results collected via a questionnaire that was sent out to a limited number of randomly chosen respondents in the Swedish software industry. This means that the results are more indicative than conclusive.

  • 18.
    Adolfsson, Albin
    Jönköping University, School of Engineering, JTH, Product Development.
    Konstruktion av campingbord: Utvecklingsprocessen för ett campingbord i aluminium1994Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
  • 19.
    Afsaridis, Kimon
    Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design. Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Investigation of residual stresses generation in aluminum flywheel2009Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
    Abstract [en]

    Quality of the castings is affected by several factors which the designer should take into consideration during the product development process. Although residual stress is one of those, it is often not considered in practical computations. Hence residual stresses are one of the forgotten areas in designing of machine parts. This master thesis is focused on the investigation of residual stresses in a high pressure die casted component, with the aim of extending its service life, by taking results from the study as a feedback.

    The investigation of residual stresses was done on a variety of specimens, cast aluminum flywheel, provided by Husqvarna AB. This flywheel is a component in a product of the same company.In evaluating the residual stresses in the part, two tools-simulation and physical measurement were used. Moreover, comparison with these two methods is also done at an area of interest on the flywheel. The simulation was carried out by using MAGMAhpdc-a module for high pressure die casting process, from the commercial software package MAGMAsoft; while for the physical measurements, the hole drilling method was used, a method believed to be less accurate at low stresses areas.

    The findings obtained from this study show that the results from both procedures are close, with small deviations observed, which reveals the reliability of the hole drilling method even when the stress levels are low. It is also found that the compressive residual stresses dominate in the component-a preferred phenomenon with regards to residual stress.

  • 20.
    Afzal, Mansoor
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    Graph-Based Visualization of Ontology-Based Competence Profiles for Research Collaboration2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Information visualization can be valuable in a wide range of applications, it deals with abstract, non-spatial data and with the representation of data elements in a meaningful form irrespective of the size of the data, because sometimes visualization itself focuses on the certain key aspects of the data in the representation and thus it helps by providing ease for the goal oriented interpretation. Information visualization focuses on providing a spontaneous and deeper level of the understanding of the data.

    Research collaboration enhances sharing knowledge and also enhances an individual’s talent. New ideas are generated when knowledge is shared and transferred among each other. According to (He et al, 2009) Research collaboration has been considered as a phenomenon of growing importance for the researchers, also it should be encouraged and is considered to be a “good thing” among the researchers.

    The main purpose of this thesis work is to prepare a model for the competence profile visualization purpose. For this purpose the study of different visualization techniques that exist in the field of information visualization are discussed in this thesis work. The study and discussion about the visualization techniques motivates in selecting appropriate visualization techniques for the visualization of Ontology-based competence profiles for research collaboration purpose. A proof of concept is developed which shows how these visualization techniques are applied to visualize several components of competence profile.

  • 21.
    Agnesson, Stina
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Bagger-Sjöbäck, Josefina
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    PREFABRICERADE SMÅHUS PLANLÖSNINGAR: En jämförelse mellan tillverkare och kund2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med arbetet är att analysera utformningen av planlösningarna i prefabricerade småhus. Resultatet ska kunna utnyttjas som underlag vid planlösningsutformning och möjliggöra planlösningar med färre kundändringar.  

    Metoder som används är litteraturstudier, intervjuer och en fallstudie. Fallstudien är gjord med material från företaget Anebyhus som tillverkar prefabricerade småhus. Ur en av deras kataloger valdes tre olika hus med snarlika förutsättningar. Det som analyseras är tillverkares och kunders prioriteringar samt de vanligaste kundändringarna. Problemet är att om kunden ska bli nöjd med den slutliga planlösningen måste kunden och tillverkaren ha liknande kvalitetsprioriteringar. Ändringar som återkommer frekvent är ett tecken på en svaghet i ursprungsplanlösningen.

    Resultaten visar att tillverkare av prefabricerade småhus möter kundernas behov och önskemål genom prioriteringar av livslångtboende och flexibilitet i planlösningen. Kunderna visar prioritering av mer bänkytor i köket, vardagsrummet storlek och samband till köket och att alla i familjen ska få varsitt sovrum. De kundändringar som förekommer mest frekvent är minskning av antalet klädkammare, sammanslagning av teknik och klädvård samt att ändra till en U-formad köksuppställning. 

  • 22. Agrell, Per J.
    et al.
    Wikner, Joakim
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    A Coherent Methodology for Productivity Analysis Employing Integrated Partial Efficiency1996In: International Journal of Production Economics, ISSN 0925-5273, E-ISSN 1873-7579, Vol. 46-47, p. 401-411Article in journal (Refereed)
    Abstract [en]

    An activity decomposition methodology with theoretical foundation in the principles of activity control and stated focus of interest in the enterprise value-chain is presented. Characteristics of inputs and outputs are discussed, where a set of non-transformable inputs are defined and motivated. An integrated partial efficiency measure is formulated, compensating for some weaknesses of the Debreu-Farrell technical efficiency concept. Providing a coherent basis for productivity analysis, the IPE approach poses an alternative to e.g. DEA especially in the case of multi-level systems and sparse data. The method is easily communicable in terms of measurement and analysis, and may be extended to complement economic performance assessments and benchmarks.

  • 23. Agrell, Per, J.
    et al.
    Wikner, Joakim
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    An MCDM Framework for Dynamic Systems1996In: International Journal of Production Economics, ISSN 0925-5273, E-ISSN 1873-7579, Vol. 45, no 1-3, p. 279-292Article in journal (Refereed)
    Abstract [en]

    A multi-criteria formulation for continuous and discrete-time dynamic systems is presented. The fundamental problem in the design of dynamic systems is the trade-off between response speed (e.g., the time to reach final value and the raise time) and response smoothness (e.g., the overshoot, the undershoot, and the transient dampening). Separate optimisation of criteria is impossible, thus the problem is inherently multiobjective. In a general dynamic system, this is accomplished by adjusting a number of technical parameters in accordance with some ad hoc practice. Previous multi-criteria approaches have been modelled as weighted sums of criteria, with shortcomings in terms of sensitivity analysis and preference articulation. The proposed framework enables the decision maker to design a most preferred system, with full knowledge of local trade-off ratios in terms of chosen criteria. Combining analytical techniques with simulation, the formulation makes the optimisation process transparent to the decision maker, working entirely in decision space. The framework is demonstrated on a dynamic production-inventory model.

  • 24.
    Agriam, Pia
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Socialt hållbart boende2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    We need more research about what gives man good conditions for quality of life in a home environment. Social sustainability is a topic that is cherished more than ever in the world of architectures. The goal is to develop a knowledge base based on the experiences of users, architects and clients that can be used for the design of residential areas with apartment buildings.

    To achieve the goal there are questions to be answered as: "How is socially sustainable housing valued, according to architects and clients, when residential areas with apartment buildings are designed?" and "How are the values of social sustainability perceived, in residential areas with newly constructed apartment buildings, of the residents?" The questions are answered by means of an survey and several of interviews which together constitute a qualitative research.

    The results show that social sustainability can be seen from different angles. It is common to observe social sustainability from a community perspective and from an urban perspective according to scientific references. As an overall summary it is the beautiful shape and appearance of a building and its functionality weighed in with a reasonable cost that creates a socially sustainable housing according to interviews with architects and clients. It is about balance between beauty, functionality and economy, which together create a housing that lasts over time and confirms the human social dignity. According to those living in the area of Nysäter in Mölnlycke as the studied phenomenon, socially sustainable housing stands for comfort, security, privacy and community. Access to nature and outdoor activities, fresh air and good neighbourship are other factors that are highly valued. Socially sustainable housing has therefore connections to both physical parameters as well as non-physical qualities that needs to be linked with each other.

    The summarized results highlight the essential aspects that should be included in the planning of a new residential complex for it to be socially sustainable for residents. The knowledge base has a logical order from analyzing an unspoilt area with its qualities to analyze how the private residence must meet human needs for well-being.

    The Report is wide in its choice of subject tough it is limited to man's relationship to the dwelling and residential area in social contexts, how individuals perceive their environment both in and outside their home. With additional constraints had a deeper research been able to implement on a specific theme.

  • 25.
    Ahl, Helene
    et al.
    Jönköping University, School of Education and Communication, HLK, Lifelong learning/Encell.
    Marlow, Susan
    Entrepreneurship and the postfeminist turn: Women’s final emancipation or the same old story?2016Conference paper (Refereed)
  • 26.
    Ahlander, Alfred
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Ekroth, Pontus
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Kommunikationsmodell för APD-plan vid användning av materialrutor och gångstråk2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: On-site construction is a complicated process. A temporary factory, with new zones for materials and workplace area must be established for each new project, which complicates the process further. Material management stands for a big saving opportunity in building projects and 40 % of the time lost on a construction site can be attributed to material management.  To overcome this waste connected to material management a well-processed logistics planning, god communication as well as experience feedback from previous projects is required. The aim for this thesis is therefore to identify improvement measure regarding the use of material-dedicated buffer zones and walking paths, and as well as create a model of communication that supports experience feedback.

    Method The thesis is a case study on two projects within the organization of NCC.  A qualitative data collection with literature review, interviews, document analysis and observation has been conducted. Semi-structured interviews have been conducted and includes seven respondents with different position within the construction industry.

    Findings: The thesis has produced factors that should be taken into consideration when material zones and walking paths are planned. The result shows that resources and structured processes are required if experience feedback should work during the construction project. To succeed with the use of material-dedicated buffer zones and walking paths, good communication of the construction site plan is needed. Furthermore, the thesis has resulted in a model of communication that supports experience feedback.  

    Implications: It’s during the purchase and delivery planning that the conditions for the material-dedicated buffer zones and walking paths are set, therefore the construction site planning should be involved more in this phase. A prerequisite for using dedicated material zones and walking paths are resources which supports the construction management with planning and performance. By using logistic resources within the organization facilitates planning and management of material at the construction site, enables that collected experience can be conveyed between projects. In the production there should be a responsible receiver of material deliveries, who is extra briefed in the constructions site plan and the material-dedicated buffer zones through continuous communication with the construction management and logistic resource.

    Limitations: Since the thesis only includes two building projects, there is a limitation of the factors and arguments that are treated. Although the result is based on two building projects the fundamental processes and course of events are similar and can therefore be applied on other building projects. 

  • 27.
    Ahlgren, Ahlgren
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineering. Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Ekblad, Alexander
    Jönköping University, School of Engineering, JTH, Civil Engineering. Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Förvaltande byggherrars inställning till BIM2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 28.
    Ahlgren, Dennis
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Patriksson, Daniel
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Konstruktion av värmeelement2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    This report aims to describing the work behind the development of a masonry heater.

    The masonry heater is developed in collaboration with the company Transient Design KB that is a product development company located in Alingsås. The company sees a possibility to cover a market segment where modern technology and design are missing.

    The report presents those methods and approaches that have been used and gives an overview to how the project has been carried out. It describes how the ideas behind the final results have produced and how they have been developed during the project's time. In the report you can also read about the final concept with its choices of construction and materials.

    The report is completed with a presentation of a final concept and a ground for possible future production.

  • 29.
    Ahlgren, Josef
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Andersson, Stefan
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Klintenheim, Johannes
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Uppvärmning och miljöpåverkan: -en jämförelse mellan fjärrvärme och bergvärme i villa2008Independent thesis Basic level (professional degree), 10 points / 15 hpStudent thesis
    Abstract [en]

    Many of todays studies show that district heating is one of the betteralternatives as heating source because of its low environmental load.

    The energy source is often leftovers from other processes producing energy or waste, like garbage or chips.

    Electricity in combination with geothermal heating is another heating system that has increased sharply during the last years, and also this system decreases the discharges that have negative affects

    on the environment compared to several other heating methods.

    This report aims to, concentrated towards these two different heating systems, estimate the amounts of discharges they indirect cause and how the environment is affected.

    We have calculated the mean value for discharges of carbon dioxide, nitrogen oxide, sulphur oxide and dust generated from electrical power used in Sweden.

    Through interviews and research we have gained data for the same substances that district heating based on combustion of garbage and biofuel generates.

    We have also in cooperation with a housing company chosen a building we see representative for many of the new single-family houses built in Sweden today.

    Based on its shape and appearance we theoretically created three alternatives of the same house, each of them with climate screens different from each other.

    Together with the amounts of discharged environmental affecting substances, these houses were the base for our calculations and studies when investigating the different heating sources environmental effect.

    The results have thereafter been analyzed and discussed from different angles.

  • 30.
    Ahlm, Andreas
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Salo, Erik
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Beslutsprocess för sourcingbeslut2006Independent thesis Advanced level (degree of Magister), 20 points / 30 hpStudent thesis
    Abstract [en]

    It seems like outsourcing often does not live up to the expected results. Furthermore, sourcing decisions are often unplanned and improvised based upon insufficient short term foundation. Poor basis for sourcing decisions can lead to that some important factors, which can result in long term consequences, could get overlooked in the decision foundation.

    The purpose of the master thesis is to create a structured decision process that could lead to a well balanced sourcing decision and apply this at Husqvarna AB.

    The method used is a case study which includes a theoretical and an empirical study.

    The decision process is based upon the theoretical framework and is structured as a number of activities. Each activity includes a number of questions that should be answered if a well balanced sourcing decision is to be made. The questions are developed so that they include all the factors that could be affected by outsourcing.

    The case at Husqvarna AB was analyzed and evaluated by using the theoretical decision process. This showed how the decision process can be used by Husqvarna AB.

    The conclusion of the thesis is that the purpose was fulfilled since a decision process was developed that could be applied at Husqvarna AB.

  • 31.
    Ahlskog, Mats
    et al.
    Mälardalens högskola, Innovation och produktrealisering.
    Bruch, Jessica
    Mälardalens högskola, Innovation och produktrealisering.
    Jackson, Mats
    Mälardalens högskola, Innovation och produktrealisering.
    Factors affecting development of production technologies in a machining environment2014In: Tools and Methods of Competitive Engineering 2014 TMCE 2014, Tools and Methods of Competitive Engineering (TMCE) , 2014Conference paper (Refereed)
    Abstract [en]

    The purpose of this paper is to identify critical factors forcing manufacturing companies to improve the development of production technology in a machining environment. The focus in the paper is on industrial challenges within product design and production system development when introducing new products in a machining environment. Particular attention is given to the product development process and the production equipment acquisition process. A single case study is presented, consisting of interviews, observations, document studies and an analysis of a large Swedish manufacturing company. The case study company is characterized by advanced production technology, high mechanization and high automation level. In parallel with the case study a literature review was conducted in order to identify state-of-the-art methods/models for efficient design and product introduction within a production system. The paper identifies a gap in the current way of working within the case company as well as challenges regarding the development of production technology. Based on the study, the need for future research has been identified including the need of developing an improved working support for efficient production technology development when industrializing new products.

  • 32.
    Ahlskog, Mats
    et al.
    Mälardalens högskola, Innovation och produktrealisering.
    Bruch, Jessica
    Mälardalens högskola, Innovation och produktrealisering.
    Jackson, Mats
    Mälardalens högskola, Innovation och produktrealisering.
    Joint Development of a Manufacturing Technology: A Longitudinal Case Study within the Manufacturing Industry2015In: 22nd International Annual EurOMA Conference EurOMA15, 2015Conference paper (Refereed)
    Abstract [en]

    In order to compete within the manufacturing industry, there is a need to acquire and develop new manufacturing technologies to differentiate the company from others. Therefore, the purpose of this paper is to analyse factors affecting development of a manufacturing technology in a joint development project with an equipment supplier. A longitudinal case study has been conducted at a Swedish manufacturing company and the collaboration between a manufacturing company and an equipment supplier has been studied. The findings reveal that tacit knowledge and good equipment supplier relationship are highly important factors that facilitate development of a manufacturing technology.

  • 33.
    Ahlskog, Mats
    et al.
    Mälardalens högskola, Innovation och produktrealisering.
    Bruch, Jessica
    Mälardalens högskola, Innovation och produktrealisering.
    Jackson, Mats
    Mälardalens högskola, Innovation och produktrealisering.
    Managing early manufacturing technology development phases and key activities2016In: 23rd EurOMA conference EUROMA 2016, International Annual EurOMA Conference, 2016Conference paper (Refereed)
    Abstract [en]

    In order to compete within the manufacturing industry, there is a need to acquire and develop new manufacturing technologies to differentiate the company from others. This paper builds on extant operations management and innovation management literature with the focus on how to managing early manufacturing technology development. A multiple case study has been conducted at a Swedish manufacturing company in the automotive industry and our paper proposes a conceptual process for early manufacturing technology development and the key activities therein. The findings are relevant for managers working with long-term development and the paper concludes by discussing implications and research limitations.

  • 34.
    Ahlskog, Mats
    et al.
    Mälardalens högskola, Innovation och produktrealisering.
    Jackson, Mats
    Mälardalens högskola, Innovation och produktrealisering.
    Bruch, Jessica
    Mälardalens högskola, Innovation och produktrealisering.
    Manufacturing Technology Readiness Assessment2015Conference paper (Other academic)
    Abstract [en]

    The purpose of this paper is to analyze and discuss how the MRL scale can support the assessment of a manufacturing technology’s maturity level. A single case study within the manufacturing industry has been conducted investigating the use of a MRL scale. An assessment of MRL 4 has been studied.

  • 35.
    Ahlstedt, Simon
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Poomann, Siim
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Uppgradering av prefabricerad villa till passivhus, baserad på en husmodell från Götenehus AB2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Rising energy prices, growing energy use and the current climate debate is a major contributing factor to today's search for new, more economical ways to use energy. The Swedish national building and planning department (Boverket) places greater demands on energy use in new housing. Local governments also place specific requirements on certain residential housing projects in addition to the requirements of Boverket, i.e. only passive houses may be built in certain areas. The terms passive house, zero-energy house and plus-energy house are becoming increasingly common in the construction industry and house manufacturers want  to offer products that meet these new requirements.

    This thesis examines whether it is possible to upgrade a pre-fabricated house so that it meets the requirements to be classed as a passive house according to FEBY (translated - Forum for energy-efficient buildings). The study is based on established calculation and production techniques used in Götenehus AB, a manufacturer of prefabricated homes. A case study based on the upgrade of a house from Götenehus is performed and the results are compared with the original house from energy and economic points of view. The production stage is also taken into consideration to see if the engineering solutions required for the upgrade can be produced with the methods in use today.

    The methodology used to process the subject have been literature studies, a case study, own calculations and consultations with staff at Götenehus and other people, who have knowledge on the subject. Energy calculations have been made using the energy  calculation software TMF-Energy v2.1, which Götenehus currently uses to calculate the energy performance of their houses. The results show that it is possible to upgrade the original house to meet the requirements for passive houses with changes made in the building envelope and heating and ventilation systems. The solution presented includes changes in all parts of the building envelope and replacement of the ventilation and heating systems. Instead of the exhaust air heat pump in the original house, a district heating system in combination with solar panels are used. The ability to combine different systems has been limited to the combinations that were available in the calculation software. The results also show that the investments needed for construction and installations are not financially justifiable. Also, the running costs for the passive house are bigger. The energy consumption for the passive house remains the same as in the original house.

  • 36.
    Ahlstrand, Sanna
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Bender, Johanna
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Nordström, Linn
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    A more efficient way of building in a developing country, influenced by industrialized building: A case study in Leticia, Colombia2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose:The purpose of this study is to approach a solution to reduce housing shortage, by using inspiration from an industrialized building concept, which can lead to the opportunity for underprivileged people to get a livable housing. The aim is to study how knowledge from industrialized building could be used for a more efficient way of building in developing countries similar to Colombia.

     

    Method:Utilizing literature studies for achieving abutment to published research also giving the authors an observant mind. With this knowledge, participatory observations were made as action research to explore the prevailing procedure when establishing a house. Operating analyzes, interviews were held in Leticia for understanding observed decisions. To be able to critically analyze the results from the interviews and observations, collected data were compared with knowledge based on the authors’ reference frames.

     

    Findings:Keystones identified as the overall concept are applicable on establishments in the western world, since the concept is designed after similar conditions. Capital is required designing a building system as well as establishing a factory for prefabrication of elements, conditions limited in developing countries. Climate conditions and prevailing corruption prevents implementation of the concept. Identified weaknesses during the observations, noted repetition of unnecessary and non-value adding activities. One conclusion is not to implement the entire industrial building system, only practice the mindset. Initially keystones are implemented such as planning, exchange of information and reflection of performed projects, in order to improve upcoming projects. These keystones require no direct capital, merely a mindset that should be implemented.

     

    Implications:The outcome of this study is to enlighten the subject, since obvious weaknesses were noticed, with capacity for development. Further research is realistic because, in a long term it will help solving the housing situation. For example, using this result as underlay for education like creating more efficient building, enlightening planning for reducing unnecessary non value-adding activities. As a conclusion of the study, identified weaknesses during the establishment affects the efficiency, creating unnecessary costs. A developing country should focus upon emphasizing reduction of costs, since their economic status is already declining.

     

    Limitations: The observations during the case study have been concentrating on one small-scaled project in Leticia, Colombia. No further observations have been made but complements such as literature studies and interviews. Due to lack of time and language barrier, the amount of collected empirical data was too limited to provide durable conclusions for question formulations. Since only observations were performed on one establishment, a general result cannot be submitted.

  • 37. Ahlström, Johan
    et al.
    Nordström, Edward
    PSQS – Power Supply Quality Simulator2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    Kitron had wishes to be able to test and measure how disturbance affects their vehicle electronic units before they have been verified by SP Technical Research Institute of Sweden in Borås. This work started with the writing of a demand specification together with Kitron for a product PSQS, Power Supply Quality Simulator, which can generate some test pulses according to a standard for electronic units to Volvos vehicles. A design proposal was developed with the help the demand specification and was verified with the help of simulations. All electric schematics was designed with the guide of the design proposal. The pulses realized in the works of this thesis are those which Kitron experienced that they have a need to test in their own premises and which are possible to generate with the means available. All work took place at Kitron in Jönköping, the restriction of the work has been the cost of components not to be to high as well as the finished product shall be easily managed. This thesis work resulted in a unit which is possible to produce a number of disturbances on the voltage feed to a unit under test. Some pulses have not been completely correct according to Volvos standard. There are large possibilities to further develop PSQS to a unit that follows Volvos standard and even other vehicle producer’s standards.

  • 38.
    Ahmadi, Najib
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Investigation of the tensile strength in pearlitic lamellar graphite iron2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Lamellar cast iron is a very important technical alloy and the most used material in the casting production especially in the automotive industry which is the major customer. There are many factors such as chemical composition, metallurgical condition and melt treatment that are effecting on the size, morphology and distribution of microstructure features of the lamella graphite iron which in turn this features effecting the material’s mechanical properties and tensile behaviour under static load.

    In the past few years many researchers have been done different investigation within improvement of mechanical behaviour in the lamellar graphite iron. Controlling the solidification rate, changing the chemical composition and using different carbon content in the melt are some of the research that have been carried out in last years. Swerea/ Swecast in Jönköping has been involved in many of previous researches. The present work is part of the previous investigation that have been carried out in the Swecast/Swerea.

    The aim of this work was to investigate the effect of different cooling rate on the microstructure parameters and furthermore how this parameters influence the ultimate tensile strength (UTS) in the lamellar graphite iron. To increase the understanding of cooling rates effect on the material properties, in this work the chemical composition and carbon content was equal in the all of the samples.

    The collected data that are based on the morphological data of the solidification structure (dendritic network, eutectic cells) and the eutectoid transformation structure (pearlite) have been correlated to the measured tensile strength. The final purpose of this work was to develop a generic model for the prediction of the tensile strength in lamellar graphite iron which has been presented in the result chapters.

    The question that have been answered in this work based on the following points.

     How the cooling rate influences the development of primary austenite phase and those effect on the UTS?

     How the pearlite interlamellar spacing develops during the different cooling rate and influencing the UTS?

     How the different cooling rates influence the size and amount of the eutectic cell and according to this how the UTS varies?

    The work has been carried out according to the time plane (see appendix 6) and the result of this work showed that cooling rate has an essential effect on the microstructure features. By controlling the cooling rate, the material strength improves significantly.

  • 39.
    Ahmadkhani, Ali
    Jönköping University, Jönköping International Business School, JIBS, Centre of Logistics and Supply Chain Management (CeLS).
    Reverse side of logistics in automotive industry2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The third party logistics (3PL) providers play remarkable function in the business world of today’s; therefore, to investigate their challenges will be a valuable study. This study has investigated the challenges and ways to manage these challenges by a 3PL provide company. The achieved results are in coordination with the literature to some extent.The most important challenges are cost, flexibility, professionalism, and quality ofservices. In managing the 3PL challenges, theoretical views mostly tend to apply distinguished approaches, tools and algorithms. Meanwhile, in the case study, it has not introduced any specific approaches or algorithm, but mostly proposed the traditional approaches, such as doing researches and investigations, or Motivation Management. 

  • 40.
    Ahmadkhaniha, Donya
    et al.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Eriksson, Fredrik
    Linkopings universitet, Department of Physics, Linkoping, Sweden.
    Leisner, Peter
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing. RISE Research Institute of Sweden, Borås, Sweden.
    Zanella, Caterina
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Effect of SiC particle size and heat-treatment on microhardness and corrosion resistance of NiP electrodeposited coatings2018In: Journal of Alloys and Compounds, ISSN 0925-8388, E-ISSN 1873-4669, Vol. 769, p. 1080-1087Article in journal (Refereed)
    Abstract [en]

    Electrodeposition of NiP composite coatings with nano and sub-micron sized SiC has been carried out to investigate the possibility of replacing hard chromium coatings. The composition and structure of the coatings were evaluated by energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) analysis, respectively. Microhardness was measured by Vickers indentation and polarization measurements were carried out to study the corrosion behavior of the coatings. The results showed that submicron particles can be codeposited with a higher content as compared to nano sized ones. However, even if a smaller amount of the nano-sized SiC particles are incorporated in the coating, the contribution to an increasing microhardness was comparable with the submicron sized particles, which can be related to the higher density of codeposited particles. SiC particles did not change the anodic polarization behavior of NiP coatings in a 3.5% NaCl solution. Finally, the effect of heat-treatment on the coatings properties at 400 °C for 1 h was studied to investigate the contribution of particles and heat-treatment on hardness and corrosion properties. It was found that the heat-treatment doubled the microhardness and changed the anodic polarization behavior of the coatings from passive to active with respect to the as-plated conditions.

    The full text will be freely available from 2020-08-04 00:00
  • 41.
    Ahmadkhaniha, Donya
    et al.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Huang, Y.
    University of Southampton, Southampton, UK.
    Jaskari, M.
    University of Oulu, Nivala, Finland.
    Järvenpää, A.
    University of Oulu, Nivala, Finland.
    Heydarzadeh Sohi, M.
    University of Tehran, Tehran, Iran.
    Zanella, Caterina
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Karjalainen, L.P.
    University of Oulu, Oulu, Finland.
    Langdon, T.G.
    University of Southampton, Southampton, UK..
    Effect of high-pressure torsion on microstructure, mechanical properties and corrosion resistance of cast pure Mg2017Conference paper (Refereed)
    Abstract [en]

    High-pressure torsion (HPT) processing was applied to cast pure Mg pieces and its effects on microstructure, hardness and tensile properties as well as corrosion resistance were evaluated. The microstructure of the processed samples was examined by electron backscatter diffraction (EBSD) and the mechanical properties were determined by microhardness and tensile tests. Corrosion resistance of the samples was studied via electrochemical impedance spectroscopy (EIS) in 3.5% NaCl solution. The results showed that HPT refined the grain size of Mg very effectively from millimeters in the cast structure to a few micrometers homogeneously through the thickness and created a basal texture on the surface. One or five turns of HPT produced no significant difference in the grain size of the processed Mg but the hardness was a maximum after one turn. The yield strength of the cast Mg was increased by seven times whereas the corrosion resistance was not affected by the HPT processing.

  • 42.
    Ahmadkhaniha, Donya
    et al.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Huang, Yi
    Materials Research Group, Department of Mechanical Engineering, University of Southampton, Southampton, United Kingdom.
    Jaskari, Matias
    Kerttu Saalasti Institute, University of Oulu, Nivala, Finland.
    Järvenpää, Antti
    Kerttu Saalasti Institute, University of Oulu, Nivala, Finland.
    Sohi, Mahmoud Heydarzadeh
    School of Metallurgy and Materials, College of Engineering, University of Tehran, Tehran, Iran.
    Zanella, Caterina
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Karjalainen, L. Pentti
    Centre for Advanced Steels Research, University of Oulu, Oulu, Finland.
    Langdon, Terence G.
    Materials Research Group, Department of Mechanical Engineering, University of Southampton, Southampton, United Kingdom.
    Effect of high-pressure torsion on microstructure, mechanical properties and corrosion resistance of cast pure Mg2018In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803Article in journal (Refereed)
    Abstract [en]

    High-pressure torsion (HPT) processing was applied to cast pure magnesium, and the effects of the deformation on the microstructure, hardness, tensile properties and corrosion resistance were evaluated. The microstructures of the processed samples were examined by electron backscatter diffraction, and the mechanical properties were determined by Vickers hardness and tensile testing. The corrosion resistance was studied using electrochemical impedance spectroscopy in a 3.5% NaCl solution. The results show that HPT processing effectively refines the grain size of Mg from millimeters in the cast structure to a few micrometers after processing and also creates a basal texture on the surface. It was found that one or five turns of HPT produced no significant difference in the grain size of the processed Mg and the hardness was a maximum after one turn due to recovery in some grains. Measurements showed that the yield strength of the cast Mg increased by about seven times whereas the corrosion resistance was not significantly affected by the HPT processing. 

  • 43.
    Ahmadkhaniha, Donya
    et al.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Pinate, Santiago.
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Leisner, Peter
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing. RISE Research Institute of Sweden, Borås.
    Zanella, Caterina
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Electrodeposition of Ni high P composite coatings containing nano and submicro ceramic particles2017Conference paper (Other academic)
    Abstract [en]

    In this study, electrodeposition of Ni-P composite coatings has been carried out to investigate the possibility of replacing hard chromium coatings. Therefore, electrodeposition of Ni-P based composite coating with different SiC particle size (50 nm, 100 nm and 500 nm) or B4C (500 nm) was performed. The coating’s composition was evaluated by energy dispersive spectroscopy (EDS), microhardness of the coatings was measured by Vickers indentor and polarization measurements were carried out to study the corrosion behavior of the coatings. The results showed that B4C particles can codeposit in higher percent respect to SiC ones. Ceramic particles increased microhardness of Ni-P coatings to 700HV0.01. The polarization behavior of all the coatings in 3.5% NaCl was similar in as plated state proving that particles did not hindered the passive behaviour. Finally, the effect of heat-treatment (at 400 ºC for 1 hour) on the coating’s properties was studied to compare the contribution of particles and heat-treatment on mechanical and corrosion properties of the coatings. Heat-treatment increased the coating’s microhardness and changed the anodic polarization behavior of the coatings respect to the as plated conditions.

  • 44.
    Ahrenbeck, Linnea
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Holmström, Josefin
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Varför vill inte fler vara skyddsombud på byggarbetsplatser?2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: A stated problem in the construction industry is to recruit and keep safety officers. The lack of willing and engaged safety officers could result in lower safety at construction sites. The purpose of this report is to examine how the safety officers are currently experiencing their work environment and examine what can be changed to improve the situation. 

    The aim of this thesis is to find out what can be improved for more people to want to be a safety officer. This is examined by the main question: Why do not more people want to be a safety officer? The main question is answered by two sub-questions:

    • Which difficulties exists in the role as a safety officer? 
    • What changes needs to be done to improve the situation?

    Method: To reach the aim of the report a case study was performed. The case is Skanska Hus Väst and is limited to the profession safety officers. The method of investigation is interviews and questionnaires, which are qualitatively conducted. The interviews are conducted with the chief safety officers. The chief safety officers can see the broad picture of the situation since they continuously keep contact with all the construction sites in their district. The questionnaires are sent to all the local safety officers in all the districts in the entire region. 

    Findings: One reason for the lack of engaged safety officers is that they do not receive the necessary respect and response from their coworkers. It makes them feel alone. There is no acceptance for safety work and the time that is needed, which give the safety officers a bad conscience when they are forced to leave their work partner. To improve the situation the safety officer’s must receive more respect from their coworkers. Knowledge and acceptance concerning safety must be improved among all workers on the construction site. The safety officers need to feel that they can, and are allowed to, influence the project. 

    Implications: To solve the problem the current safety officer’s situation must be improved. If the existing safety officers are pleased they will give a positive picture of the role to their coworkers, the potential new safety officers. The safety officers’ situation can be improved by the points that follows:

    • The safety officers must receive more respect from others in the construction site. 
    • The safety officers should advantageously be placed separate from the time plan of the project.
    • The safety officers should be involved in an earlier stage of the project. 

    Limitations: The report has been limited to only examining the role of the safety officer and their own perspective. The views of safety officers from the perspective of other roles at the construction site has been omitted from the thesis. The report does not investigate how to perform the changes.

  • 45.
    Ahxner, Johan
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Axklo, Samuel
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Införande av Lean Administration i utfallsprovsprocessen2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis concerns implementation of Lean Administration within administrative support-processes. The thesis examines how tools of Lean can contribute to the standardizing of documents and the handling of documents in order to eliminate waste. In addition, quality assurance and higher efficiency are obtained while it is possible to reach a higher capacity for value-adding activities. The empirical findings are based on action research conducted at a trading company where the supporting handling of documents concerning initial samples was studied closely.

    The background to this study can be traced to the increased global competition which has brought more companies to work with improvements to a larger extent. More companies have also decided to outsource parts of their operations to be able to focus on their core competencies. As an effect of this trend, different new actors have specialized in other areas than production. When there is no production to make more efficient, these companies have directed their work with improvements to other areas, such as the administration.

    The purpose with this thesis is to; based on Lean Administration, give suggestions for a new handling system of documents concerning the support processes for initial samples. The result of this work culminates into a proposal which is presented as a template created in Excel. The template has been created during the work with the thesis and it is built with support from principles and tools from Lean Administration. The Excel template is made to replace current documents in the specific administrative process and by doing that, contribute to standardization and increased efficiency to the work with initial samples. The template also creates options to treat customers’ different needs and it also increases quality through a built-in fail proofing feature.

    The template can be considered to be generalized and possible to implement at different companies working with initial samples. However, it may be required to change the graphical layout to company-specific needs.

    Towards the end of the writing process thoughts about developing the Excel template to a total quality document was raised. This document could contain all information concerning quality for a specific article. This idea gives opportunity for further work.

    Suggestions for further research within Lean Administration are given since there is still a lot to investigate within the field. The way the research was conducted, by viewing the work processes with Lean-glasses, can be generalized and applied to other areas than the processes concerning initial samples.

  • 46. Aid Kalle Dunkel, Laura Viktorya Chrsitina Matthias Wißotzki
    et al.
    Sandkuhl, Kurt
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    State of research in reuse of enterprise models: Systematic literature analysis of CAISE, EMMSAD, ICIS and INCOM2012In: Proceedings of the IADIS International Conference on Information Systems, 2012, p. 82-90Conference paper (Refereed)
    Abstract [en]

    The importance of managing organizational knowledge of enterprises has been recognized for decades. The systematic development and reuse of organizational knowledge is expected to improve the competitiveness of the enterprise. While the practice of “reuse” is common in general computer science there is still a lack of surveys in regard to reuse in enterprise modeling. This document reviews four different papers presented at information systems conferences over the last seven years: CAISE, EMMSAD, ICIS, and INCOM. Our analysis indicates that the majority of research is realized by case studies, theoretical frameworks and mostly on business process modeling aspects of enterprise models.

  • 47.
    AKIL, ANIL
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Manual Assembly Improvement In Make to Order Production2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Manual assembly systems are widely used for producing customized products in make to order production. Despite their competitive advantages, manual assembly systems bring several problems to the production organizations. Early identification of problems on the production floor is very important in order to keep production processes running smoothly and efficient. Hence, this research aims to increase the knowledge of understanding problems related to manual assembly systems in make to order production and develop solutions for the problems. To be able to reach the research aim, two research questions were formulated. While, the first question investigates the problems related to manual assembly systems in make to order production, the second question aims to develop possible solutions for the problems.

    To be able to investigate the research problem in a real-life context, a single case study was performed at Volvo Powertrain F-Plant in Skövde, Sweden where there is a manual assembly of heavy duty diesel engine variants. In addition, existing literature was also investigated to make connections between the theory and the practice. As a result, the problems were revealed under six main categories as assembly processes, assembly operator learning, material handling, layout, ergonomics and information system. After revealing the problems, solutions were developed for each problem by using lean production principles and lean tools such as value stream mapping, standardized work. Moreover, other methods such as implementing kitting system, eliminating 7 waste in the production and implementing Takt time were also used to develop solutions. Based on the value stream mapping at the case company, improvements were developed and future state map was created for the case company. Evidently, the theoretical framework and the results from the empirical work were supported each other. At the end of the research, both research questions were answered and the aim of the research has been reached successfully.

    The results of the research could be used as a guide for production organizations with similar production systems in order to identify and eliminate problems in manual assembly systems in make to order production. In addition, this study could be a basis to investigate the problems and their solutions in manual assembly systems in make to order production. The problems and solutions in manual assembly systems in make to order production could be extended by applying new theories and methods in the research area as a further research.

  • 48.
    Akincilar, Sera
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Rad, Cameron
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Material Handling System Design: A Case-Study in Bosch Rexroth Japan2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In today’s fierce competitive global markets, customers are demanding adjustable lot sizes, shorter lead times, higher quality and flexibility; in short, they want it all. In order to stay competitive in the market, companies need to attain both customer satisfaction and cost reduction in production operations. Material Handling Systems (MHS) is the place to accomplish this goal, since they have a direct impact on production. Therefore, the aim of this study was to design an in-house MHS that could be efficient for the production it serves.

    With this intention, a case-study has been conducted in Bosch Rexroth Japan. During the study, the information gathered through various sources; interviews, observations and measurements. Further, the gathered data is evaluated according to main pillars of the theoretical framework, which includes design principles and physical elements, information and software, human and management.

    By analyzing the findings from literature review and empirical study, first problems and challenges related to MHSs are identified. Thereafter, possible features that the system should posses are elicited and a design is built out of the selected features.

    To conclude, the results show that the success is not solely depending on system’s physical attributes; on the contrary, it is more related to rapid and accurate information sharing within the system. Another vital element is the interaction between system and the people, who are utilizing and operating the system. In general terms, the research took MHS design problems from one-dimensional equipment selection processes and enriches them by adding information sharing, human and management angles to design steps.

  • 49.
    Akincilar, Sera
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Rad, Cameron
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Material Handling System Design: A Case-Study in Bosch Rexroth Japan2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In today’s fierce competitive global markets, customers are demanding adjustable lot sizes, shorter lead times, higher quality and flexibility; in short, they want it all. In order to stay competitive in the market, companies need to attain both customer satisfaction and cost reduction in production operations. Material Handling Systems (MHS) is the place to accomplish this goal, since they have a direct impact on production. Therefore, the aim of this study was to design an in-house MHS that could be efficient for the production it serves.

    With this intention, a case-study has been conducted in Bosch Rexroth Japan. During the study, the information gathered through various sources; interviews, observations and measurements. Further, the gathered data is evaluated according to main pillars of the theoretical framework, which includes design principles and physical elements, information and software, human and management.

    By analyzing the findings from literature review and empirical study, first problems and challenges related to MHSs are identified. Thereafter, possible features that the system should posses are elicited and a design is built out of the selected features.

    To conclude, the results show that the success is not solely depending on system’s physical attributes; on the contrary, it is more related to rapid and accurate information sharing within the system. Another vital element is the interaction between system and the people, who are utilizing and operating the system. In general terms, the research took MHS design problems from one-dimensional equipment selection processes and enriches them by adding information sharing, human and management angles to design steps.

  • 50.
    Al Rammal, Monica
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Karabeg, Jenny
    Jönköping University, School of Engineering, JTH, Civil Engineering.
    Kartläggning av sex kommuners planering av kollektivtrafiken i nya bostadsområden inom Jönköpings län2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: Today we can see a steady increase in population, which calls on the municipalities to plan new residential areas and develop the old ones. This in turn leads to pressure on public transport with a focus on environmental issues and a desire for a different way of transport than by car becomes more and more relevant. The purpose is to give an overview and to understand the planning of public transportation today for six municipalities in Jönköping County.

    Method: The report has been conducted using qualitative studies in the form of interviews and literature studies. Document studies have also been used and have been downloaded from the municipalities' websites. Findings: When planning new residential areas, the municipalities try to bring public transport into account. In some municipalities, public transport has a more significant part in planning. If the municipality fail to achieve the aims of public transport planning, it will mainly result in negative environmental impacts. For the municipality to develop and make sure that the number of inhabitants increases, public transport should be an important part of the planning. When it comes to the cooperation between Jönköpings Länstrafik and the municipalities, they focus on public transport and that It will cover the need for travel in the municipalities. It is important that you already in the early stages of planning make sure that there is room for the public transport that is required.

    Implications: Public transport must continue to be a major part of planning and focus should be on realizing what is planned for public transport. Although the municipalities are planning public transport, there are residential areas that could have a significantly better access to public transport.

    Limitations: As time was not enough for a study covering all 13 municipalities in Jönköping County, it was decided to focus only on six municipalities with different circumstances and varying sizes.

1234567 1 - 50 of 3373
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf