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  • 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
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Bebyggd miljö. 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 perspective2016Inngår i: American Journal of Alzheimer’s Disease and Other Dementia, ISSN 1533-3175, E-ISSN 1938-2731, Vol. 31, nr 7, s. 551-563Artikkel i tidsskrift (Fagfellevurdert)
    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
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap. 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 technology2015Inngår i: Indoor + Built Environment, ISSN 1420-326X, E-ISSN 1423-0070, Vol. 24, nr 5, s. 617-630Artikkel i tidsskrift (Fagfellevurdert)
    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.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap. 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 methods2017Inngår i: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 117, s. 60-72Artikkel i tidsskrift (Fagfellevurdert)
    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%). 

    Fulltekst (pdf)
    fulltext
  • 4.
    Aasa, Emma
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap. Jönköpings University.
    Rosell, Michaela
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap. Jönköpings University.
    Den juridiska statusen för 3D-modeller som bygghandlingar2023Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Introduction – This thesis in Building Engineering at Jönköping University, in collaboration with Tyréns Sweden AB, examines the issues surrounding 3D models as construction documents from a legal perspective and investigates how digitization affects stakeholders in the construction industry. The goal of the study is to explore a relevant and interesting research area in order to contribute to knowledge development and the advancement of new theories or methods in the field.

    Method – The study will employ qualitative research, including primary data collection through interviews, to address the research questions posed in the report. The authors have chosen this method to achieve a comprehensive understanding of the respondents' perspectives and identify important themes and patterns. The interviews were conducted with participants from various sectors of the construction industry to obtain a broader picture of the subject.

    Results – The study revealed that there are certain legal barriers to the use of 3D models as drawing documentation. These barriers are related to a lack of knowledge and uncertainty in handling the models. This includes issues of copyright, liability, and evidential value. There is a need to update current regulations to facilitate the management of digital models.

    Analysis – The analysis of the results clarifies that industry standards and clearer guidelines would prevent uncertainties and address knowledge gaps in the use of BIM and 3D models. An industry standard could have facilitated a smoother transition to a more digitized construction industry. There is also a need for education in the field for professionals and decision-making stakeholders.

    Discussion – The discussion focuses on possible solutions to the identified problems, such as the development of standards and guidelines, education, and regulatory updates. There is also a need to raise awareness about the legal aspects of using 3D models in the construction industry, as the uncertainty regarding their legal status is high. Legally, it is possible to use 3D models as contractual documents, but the study shows that concerns about the legal aspects are a reason for the weak implementation.

    Keywords – 3D model, 3D design, BIM, Building Information Modeling, construction documents, contractual law, and copyright.

    Fulltekst (pdf)
    fulltext
  • 5.
    Abbas, Ibrahim
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Thurann, Alexander
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Implementering av Aerogel-matta vid köldbryggor2020Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 6.
    Abdalla, Jack
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Al-Najem, Tony
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Implementering av det biofila fenomen i utformningen av skolbyggnader2022Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Introduction: Today, humanity is trying to develop in all areas of life, so that we can reach a cleaner, more modern, and more sustainable world. This study highlights the importance of architecture to improve areas of life. This report talks about a type of architectural design. It is called biophilic design which means to combine nature with buildings. This study is about biophilic design in school buildings.

    Method: To perform the survey, three different methods were chosen. The first method was a questionnaire sent to college students and high school students, the second method was interviews conducted with knowledgeable architects who have extensive experience in the subject of biophilic design and the last method was literature studies.

    Results: All data collected from the questionnaire, the interviews and literature studies are summarized as follows:Most college students and high school students think that when you are closer to nature it makes you feel better and that it would help improve the teaching process. Architects who were interviewed thought that biophilic design in school buildings has both advantages and disadvantages, but in general they support the idea of using and spreading the idea more in Sweden.

    Analysis: The analyzed data have shown that it is possible to implement biophilic design on the inside and outside of a school building in unusual ways. But many problems will arise, and one must have the will to continue to maintain these materials. It turned out that having these natural elements in school will contribute to a positive effect on the learning environment and the students themselves. For example, as a more creative, calm, and de-stressing environment. Having a green roof seems like an innovative idea but it requires a lot of maintenance.

    Discussion: This study focuses on how to implement biophilic design in a school building and what impact it has on the learning environment. The study addressed what is required to integrate the qualities of nature in the right way to maximize its effects. Studying biophilic design, nature and how it affects people and architecture and its impact on people has helped to lead to a clear result.

  • 7.
    Abdallah, Mohamad
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    El Ammarin, Abdalhadi
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    En studie i användning av BIM i förstudie och bygglovsprocessen inom kommunal verksamhet2023Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Abstract 

    Introduction: The construction industry is a large industry and like all other industries, it must always develop. The development can involve several factors, but within today's construction industry, Building Information Modeling (BIM) is a central part of the development. Companies and organizations in Sweden have shown for a long time that there are shortcomings in BIM and its use compared to other countries. There are several reasons for this, but above all the high costs and lack of knowledge about BIM. BIM can facilitate and streamline the construction process and it is something that is not fully utilized, which can make the process slower and less efficient. Communication is a big part of BIM as it facilitates communication, which is one of the biggest problems in the construction industry.Method: The method used to present the theories in the study is semi-structured interviews so that the interviewee has the freedom to design their answers. As well as literature implementation from theoretical frameworks that have been the main data collection method.Results: What the study showed after the conducted interviews and the implementation of literature is that there is a lack of BIM use and digital tools. The shortage exists at different levels in the different municipalities and differs even if the municipalities are roughly the same size when it comes to area and population. Some municipalities have taken the first step towards digitization and have succeeded in that step.Analysis: BIM is a tool that can make it easier for municipalities and companies to work. If they use BIM, it can save time, money and resources. the municipalities know about this and want to use BIM in their work system, but they encounter some problems. They have a lack of trained staff and the economy right now makes it difficult to carry out the process.Discussion: The study shows that BIM is used too little within the municipalityaccording to interviews and literature review. Introducing BIM is expected to make work easier for municipalities, but there are challenges for organizations that want to use BIM and participate in technology development.Keywords: BIM, BIM implementation, Pros and cons of BIM, Preliminary study, Client, digitization within municipal operations and digitization of the building permit process.

  • 8.
    Abdulameer, Hasanain
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Chamoun, Kristian
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    BIM i små och medelstora anläggningsföretag.2015Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    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.

    Fulltekst (pdf)
    fulltext
  • 9.
    Abdulkareem, Rawa
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Gherghiceanu, Marian
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Evaluations of Product Data Template initiatives2022Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The AEC (Architecture, Engineering, and Construction) industry has been undergoing a significant digitaliza-tion process in the last years. This transformation implies new challenges and adaptation concerning the ex-change of data between different software applications. Therefore, in response to this problem the benefits of IFC as a solution for the exchange of data have been investigated. However, the current versions of IFC cannot achieve semantic clarity in mapping entities and relationships. Therefore, there have been several attempts to develop solutions and optimizing methods to improve the exchange of information of product data. This paper aims to identify and investigate the challenges of using product data templates (PDT) for exchange of infor-mation and different PDT has been evaluated and compared. The necessary data was collected through literature review and document analysis. Five challenges and five initiatives were identified during the literature review. The five initiatives are Semantic web and linked data, CoClass, Buildingsmart, COBie and Cobuilder. The result showed how these initiatives could solve the identified challenges. 

    Fulltekst (pdf)
    fulltext
  • 10.
    Abdul-Rahman, William
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Andersson, Viktor
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Conceptual design and development of an off-road cargo trailer for bicycles2023Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    This report presents the conceptual development of an off-road cargo trailer designed for usage in conjunction with bicycles when camping. The objective of the study is to address the limitations of existing cargo trailers and thereafter create a trailer that efficiently can navigate off-road terrains while carrying various types of cargo. The research includes collecting data regarding user behaviours and desired functions an optimal trailer should obtain and was translated into user requirements. The result demonstrates the successful development of an off-road cargo trailer on a conceptual level that offers innovative solutions and improved load-carrying capacity in comparison to the available market, while considering factors such as weight, manoeuvrability, and ease of use. This research contributes to the field by presenting data, which can be used in development and a comprehensive solution that expands the possibilities for bicycle-based cargo transportation in off-road environments. Future work can include further refinements to optimise the trailer’s performance and address additional user requirements based on the data presented.

    Fulltekst (pdf)
    fulltext
  • 11.
    Abi-Khalil, Pierre
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Abdulahad, Zuhair
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Stadsutveckling i mellanstora städer: En studie om förtätning i centrala Norrköping ur ett socialt och ekologiskt perspektiv2018Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Planners in Norrköping municipality today facing a challenge to meet Norrköping'sneeds in the housing market, while at the same time achieving demand for public places and areas such as parks, squares and nature areas. When existing areas within the city's borders are built, so-called densification takes place in the city, whichcan have both positive and negative consequences. The aim of this study is to investigatehow the densification has affected Norrköping's inner city from a social and ecologicalperspective with a focus on free space, and present proposals for measures forbetter management of the densification in central Norrköping.

    This study has mainly been carried out using a qualitative research method.A qualitative study is based on soft data such as interviews, document analysis and literature studies. The interviews have been conducted with respondents from Norrköpings municipality and the document analysis consists of steering documents obtained from Norrköpings municipality and Pontarius AB. Some data is obtained from documents and studies where results are presented in the form of tables, diagrams, figures and GIS analysis, which means that quantitative methods are also applied.

    To perform a safer densification, it is important that the municipality establishes safe guidelines and steering documents to relate to. These control documents should be used as a framework for efficient exploitation and ensure that the city's freeareas are developed from a sustainable perspective and that a good quality is includedin the development.

    It is advantageous that the development of the densification takes placeaccording to guidelines and documentation prepared by the municipality. To ensure maximum efficiency in exploitation, these guidelines should be followed at an early stage. It is also important that there is a balance of free space size and their quality. Too small a surface leads to a higher load and larger surfaces can be perceived as superfluousand a feeling of unsecure. It is recommended to study how the densification developsin connection with the infrastructure and how it will affect free and green areas in the long run.

    This study is limited to only the inner city of Norrköping. The study also delimits economic and political factors that can influence the planning of the densification and the development of the city’s infrastructure and public transport.

    Fulltekst (pdf)
    fulltext
  • 12.
    Abrahamsson, Josef
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Karlsson, Mikael
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Bullerbegränsande åtgärder för byggnation nära befintlig väg2018Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syfte: När städerna växer i allt snabbare takt behövs nya platser att bygga bostäder på. De kommuner som växer väljer allt oftare att bebygga platser som tidigare ratats på grund av bland annat buller. Från statens sida finns det krav på hur stor bullernivån får vara. Kraven har sitt ursprung i att över två miljoner svenskar utsätts för buller dagligen. Buller kan leda till hälsoproblematik, i form av sömnstörningar och hjärt- och kärlsjukdomar. För att minska hälsoproblemen görs bullerutredningar, där förslag hur bullernivåerna kan minskas ges. Syftet med arbetet är att ge läsaren kunskap i vilka faktorer som påverkar bullerutredningar och tillvägagångssättet vid valet av bullerreducerande åtgärder så att byggnation närmare trafikerad väg kan möjliggöras.

    Metod: De metoder som använts i arbetet är litteraturstudie, dokumentanalys och intervjuer. Den litteratur som samlats in består av vetenskapliga artiklar. Dokumenten består av bullerutredningar genomförda av olika företag på olika platser i Sverige. Utifrån bullerutredningarna har personer att intervjua valts. De personer som intervjuats har utfört några av de bullerutredningar som använts i dokumentanalysen.

    Resultat: För att besvara rapportens syfte ställdes tre frågeställningar upp. Den första frågeställningen behandlar bullerreducerande tekniker, vilka tekniker som används idag. I rapporten framkom det att det finns ett flertal sätt att reducera buller. I följande ordning rangordnas de som mest frekvent använda: tyst sida, bullerskärm, hastighetsminskning, avstånd mellan hus och väg, vegetation, flytt av väg och tyst asfalt. I rapportens andra frågeställning behandlas vilka faktorer som påverkar valet av bullerreducerande åtgärd. Från litteraturstudien framkom absorption, reflektion och reduktion som viktiga faktorer. I dokumentanalysen framkom omgivning, trafik och hastighet som viktiga faktorer. I intervjuerna framkom estetik och pris som viktiga vid val av reducerande åtgärd. I den tredje frågeställningen behandlas frågan om hur byggnation närmare väg kan möjliggöras. I resultatet framkommer det att alla lösningar som tidigare nämnts har förmåga att reducera buller, men hur effektiva de är och hur bra de reducerar buller varierar från fall till fall. Omgivning och trafikmängd har stor betydelse.

    Konsekvenser: Att utnyttja de tekniska lösningar som tidigare beskrivits ger en minskad bullernivå och således kan byggnation nära trafikerad väg möjliggöras. Att utföra en bullerutredning i ett tidigt skede medför att senare och dyrare ändringar kan undvikas, vilket gör att byggnationen kan ske snabbare. Rapporten föreslår att bullerproblematiken ska beaktas tidigt i projekt, detta för att skapa en lösning som alla i projektet kan acceptera.

    Begränsningar: Rapportens resultat är begränsat till ett mindre urval av bullerutredningar och intervjuer. Fler utredningar och intervjuer hade bidragit till ett större spektrum. Rapporten tar enbart hänsyn till buller utomhus och vilka möjligheter till bullerreduktion det finns.

    Fulltekst (pdf)
    Bullerbegränsande åtgärder för byggnation nära befintlig väg
  • 13. Abrahamsson, Sam
    et al.
    Rosén, Eric
    Entreprenörer och konsulters hantering av byggmaterialens prisökning och tillgängligheten på byggmaterial i Sverige under Covid-19.2022Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 14.
    Abubakr, Raowa
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell organisation och produktion.
    Patel, Pooja
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell organisation och produktion.
    Packaging systems decision makin; to assure cost efficient transports2016Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Fulltekst (pdf)
    Packaging systems
  • 15.
    Adamsson, Mathias
    Department of Architecture and Built Environment, Lund University, Sweden.
    Non-image-forming effects of light: Implications for the design of living and working environments2018Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Seasonal variation in mood and subjective well-being are common at geographical locations further away from the equator. The 24-h light-dark cycle is the main time cue for synchronizing the human circadian clock to the external day and night.

    Nowadays, people spend more of their waking day indoors, with less exposure to the natural daylight cycle, relying on artificial lighting which differs to daylight in a number of aspects, including intensity, spectral composition and light exposure pattern.

    In parallel with the technology development that has been mainly driven by energy-saving reasons, it is important to investigate the non-image-forming effects of different properties of the daily and seasonal light exposure.

    The overall aim of the thesis was to identify characteristics of the daily light exposure that are important to support physiological and psychological needs of humans. To achieve this objective a number of research questions were posed concerning daily and seasonal light exposure, seasonal variation in physiological processes and psychological parameters, and evaluation of light exposure with respect to non-image-forming effects. The research questions were investigated in a longitudinal research design with measurements conducted each month during the year at a high latitude with large seasonal variation in day lengths.

    Self-report diaries and instruments for ambulatory- and static measurements were used to examine daily and seasonal light exposure in the working and living environments and for investigating the relationship between different parameters that can be used for evaluating light exposure according to non-image-forming effects of light. Seasonal variation in daily light exposure and regarding the pattern of light exposure was observed. Also, the results indicate a seasonal variation concerning the quality (i.e. spectral composition of the visible radiation) of the exposing light.

    Two biological markers, melatonin and cortisol, were used for investigating seasonal variation in physiological processes relating to the circadian clock. The results showed higher morning melatonin concentrations and peak level of melatonin during the winter although no seasonal change was observed concerning the phase position of the melatonin rhythm.

    Seasonal differences in mood and sleep-activity were studied by means of selfreport diaries and questionnaires. Seasonal variations were observed for both parameters. The results showed higher ratings of mood in the summer, particularly 6 in the evening, and a relationship between bedtime and evening light exposure and photoperiod length. Furthermore, longer sleep times was observed in the winter.

    Appraisal of lighting conditions in the offices during the year was rated by the use of a questionnaire. The results showed some seasonal differences concerning the perceived qualities of the light and some associations between characteristics of the lit environments and positive affect were found.

    Two methods, static- and ambulatory measurements, were used for recording lighting conditions in the working environments. Taken together, the results showed weak associations between the two methods.

    Research have demonstrated an increased need for taking non-image-forming effects into consideration when designing working and living environments, especially at geographical locations with large variations in day length where people are exposed to much of the daily light exposure at the workplace. Laboratory research has provided a good understanding of the basic concepts. However, more field research is needed. Also, current research has demonstrated that new methods of measuring and evaluating lighting conditions are needed.

    Fulltekst (pdf)
    Kappa
  • 16.
    Adamsson, Mathias
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Laike, Thorbjörn
    Department of Environmental Science, Fukuoka Women's University, Japan.
    Morita, Takeshi
    Department of Environmental Science, Fukuoka Women's University, Japan.
    Annual variation in daily light exposure and circadian change of melatonin and cortisol concentrations at a northern latitude with large seasonal differences in photoperiod length2016Inngår i: Journal of Physiological Anthropology, ISSN 1880-6791, E-ISSN 1880-6805, Vol. 36, nr 1Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    BACKGROUND: Seasonal variations in physiology and behavior have frequently been reported. Light is the major zeitgeber for synchronizing internal circadian rhythms with the external solar day. Non-image forming effects of light radiation, for example, phase resetting of the circadian rhythms, melatonin suppression, and acute alerting effects, depend on several characteristics of the light exposure including intensity, timing and duration, spectral composition and previous light exposure, or light history. The aim of the present study was to report on the natural pattern of diurnal and seasonal light exposure and to examine seasonal variations in the circadian change of melatonin and cortisol concentrations for a group of Swedish office workers.

    METHODS: Fifteen subjects participated in a field study that was carried out in the south of Sweden. Ambulatory equipment was used for monthly measurements of the daily exposure to light radiation across the year. The measurements included illuminance and irradiance. The subjects collected saliva samples every 4 h during 1 day of the monthly measuring period.

    RESULTS: The results showed that there were large seasonal differences in daily amount of light exposure across the year. Seasonal differences were observed during the time periods 04:00-08:00, 08:00-12:00, 12:00-16:00, 16:00-20:00, and 20:00-24:00. Moreover, there were seasonal differences regarding the exposure pattern. The subjects were to a larger extent exposed to light in the afternoon/evening in the summer. During the winter, spring, and autumn, the subjects received much of the daily light exposure in the morning and early afternoon. Regarding melatonin, a seasonal variation was observed with a larger peak level during the winter and higher levels in the morning at 07:00.

    CONCLUSIONS: This study adds to the results from other naturalistic studies by reporting on the diurnal and seasonal light exposure patterns for a group living at a northern latitude of 56° N, with large annual variations in photoperiod length. It seems to be seasonal variation in the lighting conditions, both concerning intensities as well as regarding the pattern of the light exposure to which people living at high latitudes are exposed which may result in seasonal variation in the circadian profile of melatonin.

  • 17.
    Adamsson, Mathias
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    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 Environments2019Inngår i: LEUKOS The Journal of the Illuminating Engineering Society of North America, ISSN 1550-2724, E-ISSN 1550-2716, Vol. 15, nr 2-3, s. 181-194Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 18.
    Adamsson, Mathias
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    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 Sweden2018Inngår i: Journal of Circadian Rhythms, E-ISSN 1740-3391, Vol. 16, artikkel-id 2Artikkel i tidsskrift (Fagfellevurdert)
    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. 

  • 19.
    Adamsson, Mathias
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Petersson, Mikael
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Aries, Myriam
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    A holistic approach for a natural light variation experience: a pilot study of a practical application for office lighting2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Lighting is crucial for vision and has important effects beyond vision, influencing a variety of physiological and behavioral processes. When designing lighting, visual aspects, effects beyond vision, and perception of the environment should be considered together in a holistic approach. As humans evolved under daylight, a lighting protocol, based on a room context and daylight characteristics, was developed and described. The lighting, with customized light levels, spectral composition and light distribution that changed dynamically to evoke a perception of daylight conditions, was realized using commercially available luminaires and a digital control system. The resulting lighting conditions are described by measurements.

  • 20.
    Adanko, Carina
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Bebyggd miljö.
    Küller, Marianne
    Lunds universitet, LTH, Inst arkitektur och byggd miljö, Miljöpsykologi.
    LED-belysning och brukaren2014Rapport (Annet vitenskapelig)
    Abstract [sv]

    Ljusforskning är om något diversifierad och omfattar teorier och metoder från skilda discipliner som teknik, medicin och samhällsvetenskap. Det finns också en förväntan att erhållna forskningsresultat skall kunna appliceras direkt i verkliga miljöer. I och med introduktionen av LED har många tidigare studier som behandlat glödlampor, lysrör och andra ljuskällor inaktualiserats. Ny kunskap - och ny forskning - krävs.

    En inventering av aktuell humanrelaterad LED-forskning genomfördes under 2013. Med utgångspunkt i detta material har föreliggande forskningsöversikt sammanställts. Totalt omfattar denna drygt 400 artiklar, som redovisas under följande rubriker: Den biologiska klockan; Flimmer och dimring av LED; Energibesparing: dagsljus och ljusstyrning; Färgåtergivning; Bländning och slutligen; Upplevda ljuskvaliteter.

    Såväl bakomliggande teoretiska resonemang som det aktuella kunskapsläget redovisas i de olika avsnitten. Efter varje avsnitt ges också referenser till relevanta forskningspublikationer. Samtliga publikationer har försetts med två eller flera svenska nyckelord, som anger publikationens innehåll. Publikationerna har sedan delars in i kategorier enligt avsnitten ovan. Efter varje avsnitt redovisas de publikationer på vilka texten baserar sig, med nyckelord. I ett slutavsnitt redovisas samtliga LED-publikationer i alfabetisk ordning efter författare och med nyckelord.

    Fulltekst (pdf)
    Adanko, Küller LED-belysning och brukaren
  • 21.
    Afza, Zukhrook
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Förstå BIM acceptans i ett utvecklingsland sammanhang: Fallet med Bangladesh's första BIM konsultverksamhet2021Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 22.
    Agnesson, Stina
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Bagger-Sjöbäck, Josefina
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    PREFABRICERADE SMÅHUS PLANLÖSNINGAR: En jämförelse mellan tillverkare och kund2012Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    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. 

    Fulltekst (pdf)
    fulltext
  • 23.
    Agriam, Pia
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Socialt hållbart boende2016Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Det behövs mer forskning kring vad som ger människan goda förutsättningar till livskvalitet i en bostadsmiljö. Social hållbarhet är ett ämne som arkitekturvärlden värnar om mer än någonsin. Målet är att ta fram ett kunskapsunderlag baserat på erfarenheter från brukare, arkitekt samt beställare som kan användas till gestaltning av bostadsområden med flerbostadshus.

    För att uppnå målet besvaras frågeställningarna ”Hur värderas socialt hållbart boende, enligt arkitekter och beställare, när bostadsområden med flerbostadshus utformas?” samt ”Hur upplevs det som värderas som socialt hållbart, i bostadsområden med nyproducerade flerbostadshus, av brukare?” Frågeställningarna besvaras med hjälp av en enkätundersökning och intervjuer som tillsammans utgör en kvalitativ forskningsmetod.

    Resultatet visar att social hållbarhet kan ses ur olika vinklar. Det är vanligt att se på social hållbarhet ur ett samhällsperspektiv och ur en stads perspektiv i enlighet med vetenskapliga referenser. Som en övergripande sammanfattning är det en byggnads vackra form, utseende och dess funktionsduglighet som vägs in med en rimlig kostnad som skapar ett socialt hållbart boende enligt intervjuer med arkitekt och beställare. Det handlar om en balansgång mellan skönhet, funktion och ekonomi som tillsammans skapar ett boende som håller över tiden och bekräftar människans sociala värdighet. Enligt de som bor på området Nysäter i Mölnlycke som är det studerade objektet, handlar socialt hållbart boende om trivsel, trygghet, privatliv och samhörighet. Tillgång till natur och uteaktiviteter, frisk luft och god grannsämja är andra faktorer som värderas högt. Därmed har socialt hållbart boende kopplingar till både fysiskt greppbara parametrar samt icke fysiska kvaliteter som behöver sammanlänkas med varandra.

    Det sammanfattande resultatet belyser de väsentliga aspekter som bör inbegripas vid planering av ett nytt bostadsområde för att det ska bli socialt hållbart för de boende. Kunskapsunderlaget följer en logisk ordning från att analysera ett orört område med dess kvaliteter till att analysera hur den privata bostaden ska uppfylla människans behov av välbefinnande.

    Rapporten är bred i sitt ämnesval även om den begränsas till människans förhållande till bostaden och bostadsområdet i sociala sammanhang, hur individer upplever sin omgivning både i och utanför bostaden. Ytterligare begränsningar hade gjort att en djupare forskning kring ett specifikt tema hade kunnat genomföras.

    Fulltekst (pdf)
    fulltext
  • 24.
    Ahlander, Alfred
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Ekroth, Pontus
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Kommunikationsmodell för APD-plan vid användning av materialrutor och gångstråk2017Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syfte: Platsbyggd byggnadsproduktion är en komplicerad process. En tillfällig fabrik, med nya materialupplag och nytt arbetsplatsområde upprättas vid varje enskilt projekt, vilket komplicerar processen ytterligare. Materialhanteringen utgör en stor besparingsmöjlighet i byggnadsprojekt och 40 % av tiden som förloras på en byggarbetsplats kan tillskrivas materialhantering. För att få bukt med slöseri kopplat till materialhantering krävs en väl bearbetad logistikplanering, fungerande kommunikation samt kunskapsbeaktning från tidigare genomförda projekt. Studiens mål är därför att identifiera förbättringsåtgärder gällande användning av materialrutor och gångstråk, samt skapa en kommunikationsmodell för arbetsplatsdispositionsplanen (APD-planen) som stödjer erfarenhetsåterföring.

    Metod: Studien har utfört fallstudier på två projekt inom NCC:s organisation. Kvalitativ datainsamling i form av litteraturstudie, intervjuer, dokumentanalys och observation har använts. Semistrukturerade intervjuer har utförts och innefattar sju respondenter med olika befattningar inom byggbranschen.

    Resultat: Studien har tagit fram faktorer som bör beaktas vid planeringen av materialrutor och gångstråk. Vidare visar resultatet att det krävs resurser och strukturerade processer för att erfarenhetsåterföring i byggnadsprojekt skall fungera. För att lyckas med användningen av materialrutor och gångstråk krävs god kommunikation av APD-planen. I studien har även en kommunikationsmodell av APDplanen som stödjer erfarenhetsåterföring tagits fram.

    Konsekvenser: Det är under inköps- och leveransplaneringen som förutsättningarna för materialrutor och gångstråk sätts, därför bör APD-planen vara mer i fokus under detta skede. En förutsättning för att användningen av materialrutor och gångstråk skall fungera är att det finns resurser som stödjer platsledningen vid planering och utförandet. Genom att använda sig av logistikresurser inom organisationen underlättas planering och hantering av material på byggarbetsplatsen och insamlade erfarenheter kan förmedlas mellan projekt. Ute i produktionen bör det finnas en ansvarig godsmottagare som är extra insatt i APD-planen och materialrutor, genom kontinuerlig kommunikation med platsledning och logistikresurs.

    Begränsningar: Eftersom arbetet endast omfattar studie av två byggnadsprojekt finns det en begränsning i vilka faktorer och resonemang som lyfts fram. Även om resultatet grundas från två byggnadsprojekt är de grundläggande processerna och händelseförloppen vid uppförande av byggnader likartade och resultatet kan därför tillämpas på liknande byggnadsprojekt.

    Fulltekst (pdf)
    fulltext
  • 25.
    Ahlberg, Oskar
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Hultgren, Patrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    KL-träbyggnad utan heltäckande väderskydd - Ett mer fuktsäkert förfarande2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syfte: Syftet med denna studie var att framställa en mall för hur man projekterar KL-träbyggnader fuktsäkrare samt ta fram rekommendationer för ett mer fuktsäkert arbetssätt. KL-trä är ett nytt byggnadsmaterial där behov av standardisering finns för att uppfylla de krav och rekommendationer som finns. Större hänsyn behöver tas till fukt då människors hygien och hälsa ej skall påverkas.

    Metod: Genom insamling av data med hjälp av fallstudie av ett flerbostadshus i KL-trä framgår såväl materialhantering som utformning av stomme och väderskydd. Utformning av stomme framgår fortsatt genom dokumentanalys av konstruktionshandlingar för tre KL-trähusprojekt. Vidare framgår branschens förhållningssätt och erfarenheter genom intervjuer av personer med olika ämnesrelevanta kunskaper.

    Resultat: Genom att i tidigt projekteringsskede prioritera fuktsäkerhet för såväl uppförande- som bruksskede reduceras risken för fuktrelaterade problem. Vidare bör det kontinuerligt arbetas med fuktsäkerhet gemensamt, mellan discipliner i projektet. Byggnadsdelar att ta särskild hänsyn till samt åtgärder för att utföra detta presenteras såväl som rekommendationer för ett mer fuktsäkert arbetssätt.

    Konsekvenser: Studiens resultat skall verka som ett komplement till ByggaF, detta då resultatet behandlar KL-trä specifikt. Genom implementering är förhoppningen att resultatet skall reducera risken för fuktrelaterade problem i KL-träbyggnader. Vidare bör högre krav ställas på fuktsäkerhet vid KL-träbyggnationer, detta då resultatet av dagens arbetssätt är okänt och försiktighetsprincipen bör tillämpas.

    Begränsningar: Studiens resultat, i form av den projekteringsmall som genererats, är i huvudsak tillämpbar för arkitekter och konstruktörer då endast stommen utreds. Resultatet är generellt tillämpbart för nybyggnation av flerbostadshus i KL-trä som uppförs i Sverige. Vidare utreds åtgärder för att reducera risken för fuktrelaterade problem och avser ej människors påverkan av mikrobiell påväxt. 

    Fulltekst (pdf)
    KL-TRÄBYGGNAD UTAN HELTÄCKANDE VÄDERSKYDD - Ett mer fuktsäkert förfarande
  • 26.
    Ahlgren, Ahlgren
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik. Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Ekblad, Alexander
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik. Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Förvaltande byggherrars inställning till BIM2017Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 27.
    Ahlgren, Josef
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Andersson, Stefan
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Klintenheim, Johannes
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Uppvärmning och miljöpåverkan: -en jämförelse mellan fjärrvärme och bergvärme i villa2008Independent thesis Basic level (professional degree), 10 poäng / 15 hpOppgave
    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.

    Fulltekst (pdf)
    FULLTEXT01
  • 28.
    Ahlstedt, Simon
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Poomann, Siim
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Uppgradering av prefabricerad villa till passivhus, baserad på en husmodell från Götenehus AB2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    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.

  • 29.
    Ahlstrand, Sanna
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Bender, Johanna
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Nordström, Linn
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    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 poäng / 15 hpOppgave
    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.

    Fulltekst (pdf)
    fulltext
  • 30.
    Ahlström, August
    et al.
    Högskolan i Jönköping, Tekniska Högskolan.
    Elsberg, Mathias
    Högskolan i Jönköping, Tekniska Högskolan.
    Nollvisionen om pappersritningar i byggbranschen - Hur kan en 3D-modell bli bygghandling2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Download (pdf)
    bilaga
  • 31. Ahmad, Rojin
    et al.
    Josefsson, Hiba
    Identifying BIM uses for Key Performance Indicators2020Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The performance of a building can be measured using a set of criteria, called Key Performance Indicators (KPI), linked to different features in a project. In the construction industry there are both subjective and objective KPIs, depending on what the main requirements are. The assessment of these KPIs are often related to building information modeling (BIM) which serves as a simulation method for mostly environmental and economical issues, meanwhile less options are available for evaluating qualitative indicators. This study aims to develop a process map in which a project manager can understand when different KPIs occur in a design process and how to make subjective KPIs measurable, thus usable for a BIM tool. Furthermore, an ideal process map is suggested to visualize appropriate BIM uses. The investigation of a case (Solar Decathlon Europe 2019) served as a test bed for identifications of subjective and objective KPIS. Documents analysis revealed a number of subjective KPIs which were further validated through semi-structured interviews with team members and leaders. Results showed that not all KPIs could fulfill the criteria of being comparable, collectable and measurable and it also proved that the evaluations of the different contest areas were subjective. Moreover, the results also indicates that the processes of the competing teams were lacking since not all necessary KPIs were taken into consideration. The overall process model graphically illustrates the process of design including when the KPIs occur and which Level Of Detail (LOD) is required. In conclusion, the contest itself is evaluated based on subjective opinions although most of the contest areas can be measured in a quantitative way. 

  • 32.
    Ahmad, Rojin
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Selmani, Antigona
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Arbetsmotivationens påverkan på kvaliteten på flerbostadshus2018Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Purpose: Several studies show that work motivation in a workplace affects the individual's ability to perform and this may result in construction errors such as unnecessary economical costs and additional work hours. The aim of this study is to investigate the link between construction errors and work motivation as well as its impact on the quality of an apartment building. Method: To complete the objective of this study literature studies, questionnaires and interviews were conducted. The literature study includes scientific articles, doctoral dissertations and encyclopedias. These are taken from, among other things, the university library databases. The surveys consist of 21 questions based on Herzberg's two-factor theory. The interviews are semi-structured and the questions are based on the results of the survey. Findings: The results show that the link between work motivation and construction errors depends on knowledge, experience, commitment, stress and time shortage, communication, chord, salary, benefits and lack of leadership. In the construction companies that were included in this study, there is a lack of motivation among professionals, and the reasons for this are mainly due to benefits from the company and chord wages. The building-related consequences that result from motivation decline prove to be economical and time-consuming. The economic consequences show huge error costs. The time suggests that errors and shortcomings in homes lead to additional working hours in order to correct the errors that occurred during the production period. Restrictions: The study includes ongoing housing projects in Jönköping where supervisors and occupational workers are current. Question one is generally answered when it is not considered corporate, as is the last question. Issue two, on the other hand, only applies to these investigated projects.

  • 33.
    Ahmadi-Naghadeh, Reza
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Liu, Tingfa
    Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom.
    Vinck, Ken
    Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom.
    Jardine, Richard J.
    Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom.
    Kontoe, Stavroula
    Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom.
    Byrne, Byron W.
    Department of Engineering Science, University of Oxford, Oxford, United Kingdom.
    McAdam, Ross A.
    Department of Engineering Science, University of Oxford, Oxford, United Kingdom.
    A laboratory characterisation of the response of intact chalk to cyclic loading2022Inngår i: Geotechnique, ISSN 0016-8505, E-ISSN 1751-7656Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper reports the cyclic behaviour of chalk, which has yet to be studied comprehensively. Multiple undrained high-resolution cyclic triaxial experiments on low-to-medium density intact chalk, along with index and monotonic reference tests, define the conditions under which either thousands of cycles could be applied without any deleterious effect, or failure can be provoked under specified numbers of cycles. Intact chalk’s response is shown to differ from that of most saturated soils tested under comparable conditions. While chalk can be reduced to putty by severe two-way displacement-controlled cycling, its behaviour proved stable and nearly linear visco-elastic over much of the one-way, stress controlled, loading space examined, with stiffness improving over thousands of cycles, without loss of undrained shear strength. However, in cases where cyclic failure occurred, the specimens showed little sign of cyclic damage before cracking and movements on discontinuities lead to sharp pore pressure reductions, non-uniform displacements and the onset of brittle collapse. Chalk’s behaviour resembles the fatigue response of metals, concretes and rocks, where micro-shearing or cracking initiates on imperfections that generate stress concentrations; the experiments identify the key features that must be captured in any representative cyclic loading model.

  • 34.
    Ahmadi-Naghadeh, Reza
    et al.
    Architecture and Civil Engineering Department, Chalmers University of Technology, Gothenburg, Sweden.
    Toker, Nabi Kartal
    Civil Engineering Department, Middle East Technica University, Ankara, Turkey.
    A new isotropic specimen preparation method from slurry for both saturated and unsaturated triaxial testing of a low-plasticity silt2019Inngår i: ASTM geotechnical testing journal, ISSN 0149-6115, E-ISSN 1945-7545, Vol. 42, nr 4, s. 854-879Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A new procedure for the preparation of low-plasticity silt specimens that are isotropically reconstituted from slurry is developed for use in both saturated and unsaturated soil testing. Spatial variations of the water content and grain size distribution were examined to confirm the uniformity of the specimens (regarding void radio and segregation). The new preparation method results in a homogeneous specimen, which has a simple stress history. The repeatability of the proposed method in preparing identical specimens was verified for both saturated and unsaturated soil testing. The strength and volumetric behavior of specimens prepared by the introduced method are compared with those of moist-tamped compacted specimens and one-dimensionally reconstituted slurry specimens by performing consolidated drained triaxial tests. The microstructure of the specimens prepared with different methods was examined using Scanning Electron Microscopy and Mercury Intrusion Porosimetry. The test results indicate that silt specimens could exhibit either dilative or contractive behavior at normal consolidated conditions, depending on the microstructure.

  • 35.
    Ahmadi-Naghadeh, Reza
    et al.
    Architecture and Civil Engineering Department, Chalmers University of Technology, Gothenburg, Sweden.
    Toker, Nabi Kartal
    Civil Engineering Department, Middle East Technical University, Ankara, Turkey.
    Exponential Equation for Predicting Shear Strength Envelope of Unsaturated Soils2019Inngår i: International Journal of Geomechanics, ISSN 1532-3641, E-ISSN 1943-5622, Vol. 19, nr 7, artikkel-id 04019061Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    An exponential equation is introduced to predict the nonlinear variation of shear strength with matric suction for unsaturated soils. The proposed equation involves three constant parameters, two of which are effective shear strength parameters (i.e., ′ and c′). The third parameter is the maximum capillary cohesion, c″max, which is the maximum possible increase in shear strength due to matric suction. A procedure for the determination of c″max from the soil-water characteristic curve (SWCC) is devised. The proposed equation is validated through a series of constant-suction consolidated drained triaxial tests conducted on specimens reconstituted by isotropic consolidation from the slurry state. In addition, the validity of the equation is investigated by applying it to the test results of five other soils that were available in the literature for the low-suction range (i.e., up to 1,500 kPa). A comparative study on the prediction of shear strength was carried out between the proposed equation and six other shear strength equations found in the literature. The results show that the proposed equation provides reliable predictions of the shear strength of unsaturated soils when the shear strength converges to an asymptotic value at the residual water content.

  • 36.
    Ahmadi-Naghadeh, Reza
    et al.
    Department of Civil Engineering, Middle East Technical University, Ankara, Turkey.
    Toker, Nabi Kartal
    Department of Civil Engineering, Middle East Technical University, Ankara, Turkey.
    Volume change measurement in triaxial testing of unsaturated soils2012Konferansepaper (Fagfellevurdert)
  • 37.
    Ahmadi-Naghadeh, Reza
    et al.
    Civil Engineering Department, Istanbul Aydin University, Küçükcekmece/istanbul, Turkey.
    Toker, Nabi Kartal
    Civil Engineering Department, Middle East Technical University, Cankaya/Ankara, Turkey.
    Volume change measurement in triaxial tests by monitoring cell fluid volume based on viscoelastic behavior of the test setup2017Inngår i: ASTM geotechnical testing journal, ISSN 0149-6115, E-ISSN 1945-7545, Vol. 40, nr 4, s. 683-697Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A novel procedure was developed to measure the total volume change of the unsaturated soils in triaxial testing. The principle of the proposed method was based on cell fluid volume measurements corrected by the assumption of viscoelastic behavior for the triaxial setup. Calibration and parameter determination procedures of the model are devised, and the presented model is implemented into a MATLAB code. The proposed method was validated through a series of consolidated drained triaxial tests on saturated specimens, by comparing the changes in volume measurement of proposed method and conventional measurement (pore fluid). The accuracy in volume measurement during consolidation and shear stages of these tests was between 0.09 and 0.32 cm3, which is on par with or better than more complex and expensive alternatives found in the literature. Repeatability of the proposed technique in measurement of the volume change was also investigated through a series of suction controlled unsaturated soil tests.

  • 38.
    Ahmadi-Naghadeh, Reza
    et al.
    Department of Civil Engineering, METU, Ankara, Turkey.
    Toker, Nabi Kartal
    Department of Civil Engineering, METU, Ankara, Turkey.
    Ahmadi-Adli, Mohammad
    Department of Civil Engineering, METU, Ankara, Turkey.
    Water content controlled instead of suction controlled strength tests2013Inngår i: Life Science Journal, ISSN 1097-8135, Vol. 10, nr 1, s. 2023-2030Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Most soils that concern geotechnical engineering are in the state of partial water saturation. Current practice tries to predict engineering properties of cohesionless soils using data from tests on saturated specimens, regardless of the saturation in the field. Due to complexity of test setups and high technical requirements, unsaturated soil tests are not among the common equipment of soil mechanics laboratory. One of these problems is the existence of suction, which is a function of water content and affects the strength behavior of unsaturated soils. Procedures to keep the water content of the partially saturated specimens constant and homogeneous in conventional soil tests are not well-established. The exception to this is unsaturated test setups, which are costly, complicated and found only in research institutions, hence prohibiting the industry from keeping up with the developments in this field. This study explores simple modifications to conventional methodologies of triaxial and direct shear tests, with the ultimate aim of preventing temporal and spatial variability of specimen water content throughout test duration. For different modifications, specimens of each test are dissected at the end of the test, and water content profiles of the specimens are obtained.

  • 39.
    Ahmadi-Naghadeh, Reza
    et al.
    Department of Civil Engineering, Middle East Technical University, Ankara, Turkey.
    Toker, Nabi Kartal
    Department of Civil Engineering, Middle East Technical University, Ankara, Turkey.
    Ahmadi-Adli, Mohammad
    Department of Civil Engineering, METU, Ankara, Turkey.
    Water content variability of unsaturated soil specimens in conventional strength tests2012Konferansepaper (Fagfellevurdert)
  • 40.
    Ahmadkhani, Ali
    Högskolan i Jönköping, Internationella Handelshögskolan, IHH, Centre of Logistics and Supply Chain Management (CeLS).
    Reverse side of logistics in automotive industry2017Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    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. 

  • 41.
    Ahmed, Mohamed
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Hassan Abdi, Nasteho
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Kommunernas planering och arbete med översvämningsrisker i lågstråk vid befintlig bebyggelse2022Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Introduktion: Många städer i Sverige har fler lågpunkter i sin terräng och är drabbadevid kraftigt regn. Förtätning i städerna förvärrar ofta problemet ytterligare då mängdenhårdgjorda ytor utökas samtidigt som tillgänglig mark för dagvattenhantering minskar.Detta gör att dagvattenflöden som behöver hanteras kan vara mycket stora och avrinnamycket snabbt. Därför är det viktigt att städerna får till en långsiktig och hållbardagvattenhantering som klarar dagens och framtidens klimatförändring. Denna rapportska undersöka hur Karlstad och Växjö kommun arbetar och planerar för den ökaderisken av skyfall samt studera de olika lösningarna som används idag. Rapporten skaäven identifiera vilka omkringliggande faktorer som påverkar dagvattenlösningarna.

    Metod: Först har det utfört en litteraturstudie för att fördjupa kunskaper och få en bravetenskaplig grund som är baserad på ämnet. För att kunna svara på frågeställningar såhar det genomförts två fallstudier och tre intervjuer med respondenter från VAavdelningen på Växjö och Karlstad kommun samt en expert. Sedan utfördesdokumentanalys av respektive kommuner utifrån planbeskrivning, hållbarhetsindexsamt dagvattenutredningen för att kunna få så omfattande material som möjligt.

    Resultat: Planeringen och arbetet har påbörjats genom att en skyfallskartering ochförsta konsekvensanalys framtagits. Ingen fullständig handlingsplan har framställts avde tillfrågade kommunerna. För att komma igång med arbetet ska Karlstad kommunanställa en skyfallssamordnare. Lösningar som används mest i kommunerna ärreningsdammar, utjämningsmagasin, gatuhantering och förnyelse av ledningsnätet.Speciell lösning i Växjö kommun är reduktion av dagvattentaxan. Platsen som skaåtgärdas, kunskap, lagar, tidsåtgång och VA avdelningens samarbete medfastighetsägare och andra avdelningar i kommun är viktiga beståndsdelar som påverkarimplementeringen av olika lösningar.

    Analys: Av resultatet kan slutsatserna dras att kommunerna arbetar och planerar välmed den ökade risken av skyfall i sårbara lågstråk. Mer arbete kan dock göras genomatt framställa en handlingsplan anpassad efter VA. Vilken lösning som tillämpas berorpå en del faktorer. Klimatförändringen som är en viktig faktor tar kommunerna hänsyntill i planeringen och arbetet genom att säkerhetsfaktor tilläggs fördagvattenanläggningar och vid dimensionering av ledningsnätet. Arbetet fortsättergenom att få ett gott samarbete mellan VA-avdelningen och teknikavdelningarna ikommunen samt fastighetsägare då det ofta leder till en god och noga förberedd lösning.Kommunerna förklarar att använda sig av kosteffektiva lösningar är viktigt dåfinansiering kommer ifrån VA-taxan. Det spekuleras i att en förändring i lagen som gerVA avdelningen möjlighet att få finansiera för skyfalls åtgärder hade minimeratöversvämningsriskerna.

    Diskussion: Resultatet anses vara användbart då kommunerna kan ta del av varandrasplanering och arbete samt hjälpa varandra i utvecklingen av hållbaradagvattenlösningar. Resultatet främjar en större förståelse kring vilka faktorer somligger till grund för de valda lösningarna. Generaliseringen av resultatet kan sättas ifråga eftersom det är platsspecifikt. Men det går att tillämpa eftersom förståelsen ökarkring hur man kan hantera ett liknande problem på en annan plats eller kommun.

    Fulltekst (pdf)
    fulltext
  • 42.
    Ahrenbeck, Linnea
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Holmström, Josefin
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Varför vill inte fler vara skyddsombud på byggarbetsplatser?2018Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syfte: Ett problem som konstaterats är att rekrytera och behålla skyddsombud inom byggbranschen. Bristen på frivilliga och engagerade skyddsombud kan bidra till lägre säkerhet på byggarbetsplatser. Syftet är att undersöka hur skyddsombuden upplever sin arbetssituation i dagsläget, samt att utreda vad som kan förändras för att situationen ska bli bättre. 

    Målet med examensarbetet är att ta reda på vad som kan förändras för att fler ska vilja vara skyddsombud. Detta undersöks genom huvudfrågeställningen: Varför vill inte fler vara skyddsombud? Huvudfrågan bryts ned och besvaras genom två delfrågeställningar:

    • Vilka nackdelar finns i rollen som skyddsombud? 
    • Vad behöver förändras för att situationen ska bli bättre? 

    Metod: För att nå målet genomförs en fallstudie. Fallet är Skanska Hus region väst och begränsas till yrkesgruppen skyddsombud. Intervjuer och enkäter används som undersökningsmetoder, vilka utformas kvalitativt. Intervjuer genomförs med huvudskyddsombud. Huvudskyddsombuden har en bred bild av situationen då de har kontakt med samtliga arbetsplatser inom sitt distrikt. Enkäter skickas ut till alla lokala skyddsombud i regionen, detta för att få en bred svarsfrekvens.

    Resultat: En stor anledning till de nuvarande skyddsombudens bristande engagemang är att de inte får gehör, vilket gör att de känner sig ensamma. Det finns inte acceptans för att säkerhetsarbete tar tid och skyddsombuden får dåligt samvete när de tvingas lämna sin arbetskollega för detta. 

    För att förbättra situationen måste skyddsombuden få mer gehör. Säkerhetsförståelse och acceptans för säkerhetsarbete måste ökas bland alla på arbetsplatsen. Skyddsombuden behöver känna att de kan och tillåts påverka projektet.

    Konsekvenser: För att lösa problemet måste situationen för de som är skyddsombud förbättras. Om de nuvarande skyddsombuden är nöjda så kommer de sprida en positiv bild vidare till sina medarbetare, de potentiella nya skyddsombuden. Skyddsombudens situation kan förbättras genom följande punkter: 

    • Skyddsombuden måste få mer gehör från övriga på arbetsplatsen.
    • Skyddsombuden ska med fördel ligga utanför projektets tidplan.
    • Skyddsombuden bör involveras i ett tidigare skede av projektet.

    Begränsningar: Examensarbetet har avgränsats till att enbart undersöka skyddsombudets roll utifrån deras eget perspektiv. Med tanke på arbetets omfattning har övriga rollers uppfattning om skyddsombuden utelämnats från undersökningen. Undersökningen har inte heller fokuserat på att undersöka hur förbättringar kan genomföras.

    Fulltekst (pdf)
    fulltext
  • 43.
    Akdogan, Sibel
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Fherm, Marcus
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Indigenisera begreppet hållbarhet hos byggföretagen2020Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Purpose: Today's society is constantly moving towards a more conscious and committed attitude about working increasingly sustainable. To ensure that the construction industry with both major environmental and societal impact is involved, there are standardized legal requirements and environmental certifications that need to be met by the construction companies. The purpose of the study is therefore to investigate factors for how medium-sized construction companies can best implement sustainability work. The aim of this qualitative study is to focus on ecological and economic sustainability as well as how construction companies can implement increased sustainability work in their daily work. The study was conducted at a medium-sized construction company in the Jönköping area.

    Method: The methods used in this study are proven methods such as literature study, interview study and document observations for data collection. The literature study is used as a bedrock for the interview study and document observation since the early literature study is used as a preliminary study in the subject. Interviews and document analysis are applied to provide information where there is lack of knowledge.

    Results: After the methods have been applied, it is evident that the sustainability work is only applied according to legal requirements when no higher demands are made by the client or the company. The construction company have abstract goals that are difficult to interpret by the recipient, the employee. It is also shown that the knowledge among employees is low and the perceived amount of training in sustainability in the company is low. The case company has no designated "sustainability officer", questions and suggestions can be emailed to an email address, but there is no clear procedure for how these suggestions should be dealt with.

    Consequences: The sustainability work has been passive; the present state is based on the absence of sustainability requirements from the permanent organization. The need of more clear goals and concrete descriptions of how to meet the goals are also needed. There are also no requirements from the permanent project organization. There are rarely requirements from the client, which means that the sustainability work is often only applied to the extent of time and with the site manager's own set requirements and goals. The knowledge about sustainability is thin among the employees concerned, which has meant that own decisions regarding sustainable choices could not be made and possibly affected the commitment to the construction company. Employees felt that it needed fewer choices, clear routines and requirements regarding sustainability work.

    Limitations: The study focuses on ecological and economic sustainability; social sustainability has been excluded as it affects people's conditions in society. In this study, ecological sustainability will not be specified, the study will research commitment and important parameters to successfully sustainability work. The exact direction that the company should take, or has taken, will not be determined in this study. 

    Fulltekst (pdf)
    Indigenisera begreppet hållbarhet hos byggföretagen
  • 44.
    Al Doory, Omar
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Logistik och verksamhetsledning. Jönköping University.
    Freytag, Daniel
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Logistik och verksamhetsledning. Jönköping University.
    Developing waste-to-energi in Brazil: A pre-feasbility study for a waste-to-energi plant in Santa Catarina, Brazil2019Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 45. Al Hassan, Rami
    Underlätta utvärderingen av digital beläggning genom undersökning av en semantisk datastruktur för BIM-baserad FM2019Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The operational phase maintains the largest proportion of the building’s lifecycle cost. Moreover, the costs of the operational phase in a building’s lifecycle could be five to seven times higher than the initial investments. However, studies show that energy savings can be between 30-42% by performing occupancy detection in buildings. Therefore, this research paper is focused on assisting and facilitating BIM-based FM integration for occupancy assessment to support various evaluations of a building. The chosen approach to reach the aim of this study is the semantic web technology, considering the advantages it can provide in contrast to other web services such as SOAP or RESTful. A case study was conducted of a room located in the first floor of the school of engineering (JTH) building at Jönköping University. The case study investigated the data structure for the technologies which might be installed in the room later and the geometrical information of it. The used ontology in this study is RealEstateCore (REC). Furthermore, a literature review was conducted to investigate the occupancy information which can be gained by the technologies in that room. Results show that presence, location and count of occupancy can be obtained by CO2, temperature and WiFi positioning technol-ogy. However, every sensor has some exclusive properties and constraints for occupancy detection and estima-tion. Thus, the fusion of various sensors is an advantage as it can significantly increase the efficiency of indoor occupancy assessment. Also, the semantic web provided homogeneous data format that allows for greater in-teroperability between the BIM information and those technologies information. Moreover, REC ontology pro-vided most of the required semantics to describe room A and the CO2 and temperature sensors it might contain. However, the ontology lacked some of the required semantics to satisfy the description of the WiFi positioning system. Thus, extending the ontology to satisfy those required semantics is needed to reach more optimized results of the semantic web.

  • 46.
    Al Masalmeh, Omar
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Al Kass Youssef, Daoud
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    En numerisk analys av olika scenarier som påverkar släntstabiliteten för en del av projekt Lappen 19 i Munksjöstaden2023Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 47.
    Al Rammal, Monica
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Karabeg, Jenny
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Kartläggning av sex kommuners planering av kollektivtrafiken i nya bostadsområden inom Jönköpings län2017Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    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.

  • 48.
    Alaouir, Taima
    et al.
    Jönköping University, Internationella Handelshögskolan.
    Orahem Gorge, Etana
    Jönköping University, Internationella Handelshögskolan.
    Investigating Inventory Management Strategies Within Food Cold-Chain During Crises: Case Study on IKEA Food2021Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Background: Recently, due to the COVID-19 pandemic, supply chains experienced an unprecedented disruption on a global scale, negatively affecting both upstream and downstream organisations. Those disruptions have created operational and demand uncertainty. During the pandemic, restrictions on movements, productions, operations and transportation were experienced in the food supply chain, which affected the flow and processes of food. The primary purpose of inventory is to serve as a buffer between supply and demand, especially when it comes to stochastic demand. Issues that are associated with inventory management are considered to be a challenge for management at many companies. Therefore, it is essential to look into how environmental uncertainty affects inventory and further explore strategies to improve inventory management performance within crises circumstances.

    Aim: The aim of this study is to explore inventory management strategies during environmental uncertainty through inventory techniques, technological innovation, as well as human resources to improve inventory management performance.

    Method: A single case study at IKEA Food was conducted and an exploratory and qualitative research design was chosen for this study. The data was collected through semi-structured interviews with eleven individuals from different departments and positions. The data were later analysed with the help of thematic analysis.

    Conclusion: This study has highlighted changes in consumers behaviour under uncertainty and its effect on inventory. Later, an assessment of the three inventory management strategies and their impact on inventory management performance during environmental uncertainty was presented. Lastly, an overarching strategic challenge within all three strategies was identified. 

  • 49.
    Alashkar, Zeen
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Andersson, Stephanie
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Vägnätsanalys i Jönköping: Fokus på cykelvägarna2018Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syfte: I en värld med allt mer kunskap om de problem som bilismen påverkar gällande miljö och hälsa är det önskvärt att allt fler väljer att cykla. Målet är att skapa en attraktiv stadsmiljö för cyklister med detta ska en ökad känsla av säkerhet finnas hos cyklisterna, så att fler kan tänka sig att välja cykeln. Metod: De metoder som har valts för att göra analysen är att kontrollera de krav och råd från Trafikverket och dels att använda Geografiska Informationssystem, samt att göra observationer enligt Mini Cycleability Index för att se om Jönköpings Västra centrum är attraktivt för cyklister. Till sist hölls en intervju med Jönköpings kommun för att se hur de tänker angående vägnätsanalyser och erhålla en åsikt om den analys som utförts i denna rapport. Resultat: Det funna resultatet visar att vägsystemet i Jönköpings Västra Centrum har vägar av olika skiftande kvaliteter. Betygen har delats in i tre: bättre, bra och sämre. Bättre är det högsta betyget och sämre det lägsta. Vägar av alla sorter återfinns inom vägnätet, men sämre återfinns mer frekvent än de övriga. Betyget byggs på hur väl vägarna fungerar inom kategorierna: utrymme, säkerhet och kontinuitet. Konsekvenser: Slutsatsen är att det finns många sämre vägar inom området som skulle behöva omarbetas för att skapa ett mer attraktivt område för cyklister. Inom området visar resultatet att vägarna med bättre betyg mestadels går mellan norr och söder och få existerar från öst till väst. På grund av detta är det svårt att cykla inom området då anslutningarna mellan de bättre graderade vägarna är sämre. Begränsningar: Begränsningen av detta arbete är valet av område (Jönköpings Västra centrum) och aspekterna som analyserats vilket är utrymme, säkerhet och kontinuitet. På grund av tidsaspekten har vidare begränsningar på datainsamlingen tillkommit, där mätning av antalet cyklister och en enkät hade kunnat vara användbar att utföra. För att anpassa Cycleability index med valet av område och metoderna som var möjliga att använda, har det en nedskärning av antalet kategorier skett.

    Fulltekst (pdf)
    fulltext
  • 50.
    Albertsson, Nils
    et al.
    Jönköping University, Tekniska Högskolan.
    Gustavsson, Isak
    Jönköping University, Tekniska Högskolan.
    Påföljder av inbyggd fukt i konstruktionselement av korslimmat trä2023Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    In spring 2023, two engineering students from Jönköping University collaborated with GBJ Bygg Jönköping to investigate the impact of moisture on cross-laminated timber (CLT) and its drying process. The study aimed to identify potential issues, damages, and propose mitigation methods. Through measurements and investigations, this study generated in-depth knowledge of moisture effects on CLT, ensuring proper material handling to avoid long-term negative consequences.The methodology involved quantitative investigations to obtain credible results. Experiments simulated the application of wet macadam on a CLT floor slab in a natural environment to measure time to reach an acceptable moisture content. Collaboration with GBJ Bygg provided access to information, materials, and simulation facilities. Two tests were conducted: immediate construction after placing washed macadam and a 9-day drying period before reconstruction. Results showed that direct macadam application led to high timber moisture content, while drying according to industry recommendations resulted in low moisture content without negative consequences. The drying process varied depending on reconstruction timing, and methods like extending macadam drying time were proposed to reduce damages and shorten the drying period.The discussion of results demonstrated data relevance with limited room for misinterpretation. However, the study's time frame limited complete results, and the lack of prior research on timber drying affected connections to previous studies. The clearest answer came from the 9-day drying test, showing a decrease in moisture content. Some measured values deviated, possibly due to measurement errors. Facility climate and construction execution posed potential error sources. Despite limitations, the experiment effectively addressed the study's purpose and research questions.

    Fulltekst (pdf)
    Påföljder av inbyggd fukt i konstruktionselement av korslimmat trä
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