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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
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science. Jönköping University, School of Engineering, JTH. Research area Built Environment. Building Physics and Services, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, the Netherlands.
    Diakoumis, Adonia
    Building Physics and Services, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, the Netherlands.
    van Hoof, Joost
    Fontys EGT—Centre for Healthcare and Technology, Fontys University of Applied Sciences, Eindhoven, the Netherlands.
    Shedding a light on phototherapy studies with people having dementia: A critical review of the methodology from a light perspective2016In: American Journal of Alzheimer’s Disease and Other Dementia, ISSN 1533-3175, E-ISSN 1938-2731, Vol. 31, no 7, p. 551-563Article in journal (Refereed)
    Abstract [en]

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

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

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

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

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

  • 4.
    Abi-Khalil, Pierre
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Abdulahad, Zuhair
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Stadsutveckling i mellanstora städer: En studie om förtätning i centrala Norrköping ur ett socialt och ekologiskt perspektiv2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    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.

  • 5.
    Adamsson, Mathias
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    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 length2016In: Journal of Physiological Anthropology, ISSN 1880-6791, E-ISSN 1880-6805, Vol. 36, no 1Article in journal (Refereed)
    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.

  • 6.
    Adamsson, Mathias
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Laike, Thorbjörn
    Department of Architecture and Built Environment, Lund University, Lund, Sweden.
    Morita, Takeshi
    Department of Environmental Science, Fukuoka Women’s University, Higashi-Ku, Fukuoka, Japan.
    Comparison of Static and Ambulatory Measurements of Illuminance and Spectral Composition That Can Be Used for Assessing Light Exposure in Real Working Environments2019In: LEUKOS The Journal of the Illuminating Engineering Society of North America, ISSN 1550-2724, E-ISSN 1550-2716, Vol. 15, no 2-3, p. 181-194Article in journal (Refereed)
    Abstract [en]

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

  • 7.
    Adamsson, Mathias
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Laike, Thorbjörn
    Lund University, Sweden.
    Morita, Takeshi
    Fukuoka Women's University, Fukuoka, Japan.
    Seasonal variation in bright daylight exposure, mood and behavior among a group of office workers in Sweden2018In: Journal of Circadian Rhythms, ISSN 1740-3391, E-ISSN 1740-3391, Vol. 16, article id 2Article in journal (Refereed)
    Abstract [en]

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

  • 8.
    Adamsson, Mathias
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Petersson, Mikael
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Aries, Myriam
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    A holistic approach for a natural light variation experience: a pilot study of a practical application for office lighting2019Conference paper (Refereed)
    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.

  • 9.
    Ahlander, Alfred
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Ekroth, Pontus
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Kommunikationsmodell för APD-plan vid användning av materialrutor och gångstråk2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

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

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

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

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

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

  • 10.
    Ahlberg, Oskar
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Hultgren, Patrik
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    KL-träbyggnad utan heltäckande väderskydd - Ett mer fuktsäkert förfarande2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: The purpose of this study was to produce a template for how to design CLT buildings moisture-safer and to make recommendations for a moisture-safe working method. CLT is a new building material where there is a need for standardization to meet the requirements and recommendations that exist. Greater consideration needs to be given to moisture in order for people's hygiene and health not to be affected.

    Method: By collecting data using a case study of a multi-story house in CLT, material handling as well as design of framework and weather protection are shown. Design of framework appears through document analysis of design documents for three CLT house projects. Furthermore, the industry's approach and experience are disclosed through interviews of people with different subject-relevant knowledge.

    Findings: By, in the early design stage, prioritizing moisture safety for both construction- and use stages the risk of moisture-related problems is reduced. Furthermore, it should be continuously and jointly worked with moisture safety between disciplines in the project. Building components to take special account of and measures to do this are presented as well as recommendations for a more moisture-proof working method.

    Implications: The results of the study should be a complement to ByggaF, this is because the result specifically addresses CLT. Through implementation, the hope is that the result will reduce the risk of moisture-related problems in CLT buildings. Furthermore, higher requirements should be set on moisture safety in CLT construction, as the result of the current working method is unknown and the precautionary principle should be applied.

    Limitations: The study's result, in form of the design template that is generated, are mainly applicable to architects and designers as only the framework is investigated. The result is generally applicable for new-construction of multi-story buildings in CLT which are constructed in Sweden. Furthermore, measures to reduce the risk of moisture-related problems are being investigated and does not refer to people's influence by microbial growth.

  • 11.
    Ahlgren, Ahlgren
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineering. Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Ekblad, Alexander
    Jönköping University, School of Engineering, JTH, Civil Engineering. Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Förvaltande byggherrars inställning till BIM2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 12.
    Ahmad, Hudallah
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Ulfvengren, Julia
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    LCA-SIMULERING FÖR EN MODULBYGGNAD GENOM FYRA OLIKA LIVSCYKLER2019Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: There is a severe housing shortage in Sweden, with a deficiency of schools and preschools. At the same time, carbon dioxide emission is measuring higher than ever and the realization of environmental crisis is clear. The building sector is responsible a high percentage of carbon dioxide emissions. Calculation for the climate impact can be implemented through life cycle assessment (LCA), directives are requested on how to build through an LCA perspective. The study investigates modular buildings that constitute an efficient and flexible way of managing the building shortage. The aim of this research was to get answers from an ecologically sustainable perspective to what provides more advantageous to process modules when the time- limited building permit expires and a module is needed somewhere else, with or without extra isolation.

    Method: A quantitative methodology was used to accomplish the aim. The climate impact of four different types of lifecycles simulates by using the software Anavitor. Other methods used for data acquisition was document analysis, calculation of specific energy use and transmission loss.  

    Findings: The results present advantageous choices for stakeholders to pick after the time-limited building permits expire and a new module is demanded at another place. The study shows that less carbon dioxide emission is produced when reusing the module rather than demolish and produce a new module. Energy savings can be made which reduces the total climate impact of the module that are additionally insulated. 

    Implications: The conclusion the group could deduct was that the production and manufacturing stage has a significant impact on the total climate impact that a renovation and non-manufacturing scenario is always more advantageous. By adding additionell isolation savings on total carbon dioxide emission can be made despite increased material use.  

    Limitations: The results are limited to a life cycle assessment based on a module’s envelope as the interior and technical equipment is the same for all scenarios. The study was based on a standard module in which the equipment has no effect on the results. The result was initially specific, but with the help of calculation of the breakpoint for independent transport distances, a general validity could be given. 

  • 13.
    Ahmad, Rojin
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Selmani, Antigona
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Arbetsmotivationens påverkan på kvaliteten på flerbostadshus2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    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.

  • 14.
    Alashkar, Zeen
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Andersson, Stephanie
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Vägnätsanalys i Jönköping: Fokus på cykelvägarna2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: In a world with an increased awareness of the harm caused by traffic to the environment and health, it is preferable that more people choose cycling instead of driving. The purpose of this work is to create an attractive city environment for cyclists which will give a greater sense of security and leading to more people considering the use of bicycles. Method: The methods chosen to make the analysis is to check the demands and recommendations from Trafikverket, moreover make observations according to Mini Cycleability Index in order to see if the West Center of Jönköping is attractive to cyclists. Geographical Information systems has been used as a method for data collection and analysis. At last an interview was held with Jönköping municipality to discover what future plans they have regarding the studied area and how relevant the plans are with the findings of this research. Further purpose of the interview with the municipality was to see how they perform a road-network analysis and obtain an opinion on the analysis performed in this paper. Findings: The results show that the road system in Jönköping West Center has roads of shifting qualities. The grades have been split into three; great, good and poor. Great being the highest grade and poor the lowest. The three qualities of roads do exist within the area, however the poor roads appear to be more frequent than the others. The evaluation system is built upon how well the roads perform in the categories: space, safety and continuity. Implications: The conclusion of this work is that there are several roads as graded poor within the area that need to be considered for reconstruction to create an attractive area for cyclists. In the area the results showed that the roads graded as great mostly runs from north to south and few exists from east to west. Due to this it is difficult to bike within the area as the connectivity between the great graded roads are lacking. Limitations: The investigation is limited to the choice of the area (Jönköping West Center) and the aspects analyzed which are safety, space and continuity. Due to the time aspect further limitations on data collection has come, where a measurement of cyclists and a survey could have been useful to do. In order to suit the Cycleability index with the choice of area and the methods available to use, there has been a reduction of the amount categories evaluated

  • 15.
    Alatalo, Juha M.
    et al.
    Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, Doha, Qatar.
    Jägerbrand, Annika K.
    Jönköping University, School of Engineering, JTH, Civil Engineering and Lighting Science.
    Chen, Shengbin
    College of Ecology and Environment, Chengdu University of Technology, Chengdu, China.
    Sun, Shou-Qin
    Institute of Mountain Hazards and Environment, Chinese Academy of Science, Chengdu, China.
    Molau, Ulf
    Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden.
    Bryophyte cover and richness decline after 18 years of experimental warming in Alpine SwedenManuscript (preprint) (Other academic)
    Abstract [en]

    1. Bryophytes in the Arctic and Alpine regions are important in terms of biodiversity, cover and biomass. However, climate change and widespread shrubification of alpine and arctic tundra is predicted to increase in the future, with potentially large impacts on bryophyte communities.

    2. We studies the impact of 18 years of experimental warming with open top chambers (OTCs) on bryophyte cover, richness and diversity in an alpine mesic meadow and a heath plant community in Northern Sweden. In addition we investigated the relationship between deciduous shrubs and bryophytes.

    3. Cover and richness of bryophytes both declined due to long-term warming, while diversity did not show any significant responses. After 18 years, bryophyte cover had decreased by 71% and 26 in the heath and meadow, while richness declined by 39% and 26%, respectively.

    4. Synthesis. Decline in total bryophyte cover in both communities in response to long-term warming was driven by a general decline in many species, with only two individual species showing significant declines. Although most of the species included in the individual analyses did not show any detectable changes, the cumulative change in all species was significant. In addition, species loss was slower than the general decline in bryophyte abundance. As hypothesized, we found significant negative relationship between deciduous shrub cover and bryophyte cover, but not bryophyte richness, in both plant communities. This is likely due to a more delayed decline in species richness compared to abundance, similar to what was observed in response to long-term warming.

  • 16.
    Ali, Rebaz
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Alshami, Ahmed
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Sättningar i torvmaterialet: En fallstudie om användning av förstärkningsmetoden "förbelastning i form av överlast" på jordmaterial av torv2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: The aim of this degree project is to control the set-up for a longer period by means of the workplace at the use of the total station for then comparing calculated outcomes with real outcomes.

    Method: A combination of both quantitative and qualitative studies have been used in this degree project, consisting of literature studies and a case study including interviews, document analyzes, site visits and measurements. The case study is based on an ongoing project in the municipality of Nassjo, where a skate park is constructed and whose soil consists of peat. Preload in the form of overload has been applied.

    Findings: The result indicates the occurrence of a difference between calculated outcome and actual outcome regarding set rate and time course when using preload in the form of overload. The deviation is about 20 cm. Preload in the form of overload is a good method for peat land, but it is unlikely to be remarkably improved by vertical drainage.

    Implications: In view of the measurements produced by the authors, this shows that the method of loading in the form of overload on peat field works, however, gives the calculation model which has been used to be uncertain. The result described in more detail regarding vertical drainage on peat fields will not accelerate the process because the peat is already well drained. This means that it will cost extra without benefiting from the method.

    Limitations: The work has limited to two reinforcement methods on peat fields. A case study has been limited to only one area. There was preload in the form of overload, whose soil material consists of peat.

    Keywords: Peat, Permeability, Preloading in the form of overload, settlements, total station, vertical drainage, water quota.

  • 17.
    Alizadehsalehi, Sepehr
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science. Civil Engineering Department, Eastern Mediterranean University, Turkey.
    Yitmen, Ibrahim
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science. Civil Engineering Department, Eastern Mediterranean University, Turkey.
    Celik, Tolga
    Civil Engineering Department, Eastern Mediterranean University, Turkey.
    Arditi, David A.
    Department of Civil and Architectural Engineering, Illinois Institute of Technology, United States.
    The effectiveness of an integrated BIM/UAV model in managing safety on construction sites2018In: International Journal of Occupational Safety and Ergonomics, ISSN 1080-3548, E-ISSN 2376-9130, p. 1-16Article in journal (Refereed)
    Abstract [en]

    Introduction. A variety of approaches exist to achieve better construction safety performance, but only a few consider a combination of building information modeling (BIM) and unmanned aerial vehicles (UAVs).

    Method. This article presents a four-dimensional (4D) BIM/UAV-enabled safety management model based on IDEF0 language. In the first step, potential hazards are identified with the help of safety specialists’ experiences and BIM software used in the design of the structure. Then, a UAV monitors the location of the potential hazards. The third step involves the integration of the 4D BIM-based model and the information obtained from the UAV. Finally, the combined data are analyzed and interpreted, and site safety staff are notified about measures to be put in place to prevent accidents.

    Results. This model shows a strong relationship between the design and construction phases by using BIM in the design phase and UAVs in the construction phase. The proposed safety model was evaluated by construction safety specialists in a two-pronged approach.

    Conclusion. The number of fatal, non-fatal and property damage-causing accidents may be significantly lower when the proposed system was used.

    Practical application. This model allows safety specialists to identify hazards and develop suitable mitigation strategies. 

  • 18.
    Alomar, Rahaf
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    George Joseph, Beinu Shyne
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    The use of artificial intelligence in BIM and user preferences data: A framework for design sustainability evaluation and improved decision making2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Sustainability evaluation in building designs needs to consider the three aspects of sustainability, social, environmental and economic, simultaneously. The social aspect is less focused on the existing sustainability assessment methodologies and should be more incorporated in the assessment. The aim of this paper is to contribute a new method to sustainability evaluation that incorporates user preferences and important factors from the three aspects of sustainability and investigates Artificial intelligence (AI) for finding the best design that fits the user needs. Therefore, a framework in which a metric to compute the design quality of life (QoL) and an algorithm for evaluating design sustainability is proposed for best decision making. Building users, experts, and data from Building Information Modelling (BIM) simulation results were incorporated into the process. The study involves a literature review, a survey for collecting user preferences as methods and an experiment for testing the framework. Artificial data from designs and user is used in the experiment as inputs. The results demonstrate the feasibility of this framework to evaluate design sustainability and approximate the design that fits best the user’s requirements based on the three aspects of sustainability simultaneously. User preferences are incorporated into the framework to improve evaluating the social aspect of sustainability. More comprehensive design sustainability evaluation can be developed based on the proposed framework.

  • 19.
    Amaya Segura, Sebastian
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Snarberg, Kristofer
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    En utredning angående ett snabbt cykelstråk längs Vätterns södra strand2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: In order to make it more attractive to use the bike as a means of transport, several cities have upgraded their bicycle tracks to bicycle highways. A bicycle highway allows cyclists to travel fast due to the qualities of the design. Several studies shows the impact of the bicycle highway considering a higher rate of bicycle usage. The aim of the thesis is to investigate a bicycle highway along the south beach of Vättern and its impact according to the objectives set by the municipality of Jönköping. A design proposal is thereafter being made, according to cyclists´ preferences and the objectives and conditions of the municipality of Jönköping, broken down into three issues: 

    • How can a bicycle highway contribute to Jönköping municipality’s objective of increasing bicycle traffic to and from the city centre? 

    • What do cyclists demand for the design of a bicycle highway? 

    • How can a favourable design of a bicycle highway look according to cyclists’ preferences in consideration of the conditions of Jönköping municipality? 

    Method: In order to answer the aim of the thesis, a case study is being conducted in Jönköping municipality through interview and document analysis. In order to locate cyclists’ preferences, a survey is conducted using a poll. Throughout the process, literature studies are being made in order to formulate a design proposal of a bicycle highway along the south beach of Vättern. 

    Findings: The result of question 1 shows that Jönköping municipality’s goal of increased bicycle traffic already has been achieved. The interview shows the complexity of the bicycle issue and the importance of connecting districts in order to increase the bicycle traffic.  

    Question 2 shows that cyclists prefer a cohesive road network, while pedestrians prioritize the safety against road crossing traffic in terms of the design of a cycle path. The qualities that are prioritized by the users contribute to an increased amount of the bicycle traffic. 

    Question 3 presents design proposals at critical places along the south beach of Vättern, where improvements should be made regarding the required standard for the bicycle highway. The improvements are results of analysis of collected empirical and theoretical framework.  

    Implications: The conclusion of the investigation shows that a bicycle highway contributes to more cyclists in a concentrated location, but the total amount of cyclists is unlikely to increase significantly. The route Jönköping – Huskvarna is considered to have the biggest potential. In order to get a more detailed view of the impact of the bicycle highway, the economic aspects are recommended as a main area for future studies. 

    Limitations: The location of the bicycle highway investigated in this report is set to the south beach of Vättern, between Bankeryd and Huskvarna. The economic factors and technical details are not included in the investigation. 

  • 20.
    Andersson, Felix
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Partnering bland små och medelstora entreprenader2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 21.
    Andersson, Jesper
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Gard, Ludwig
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    En analys av CO2e-utsläpp vid tillverkning och transport av prefabricerade betongelement2019Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: The global concrete consumption amounts to 25 gigatons annually, making it the most widely used building material (Petek Gursel, et al. 2014). The continued increasing world population in connection with urbanization will lead to a greater demand for cement. The problem with the increased manufacturing process of cement is that carbon dioxide emissions in 2020 will account for 10-15 % of global CO2 emissions, compared with the values measured in 2016, which only reached 5-8 % (Habert & Ouellet-Plamondon, 2016). The aim of the thesis is to analyse stages in the manufacturing process of prefabricated concrete from an environmental point of view with consideration to CO2 emissions. This will later result in providing concrete improvement measures or alternatively only provide useful knowledge for the concrete industry’s future. The stages that will be analysed are transport, concrete, rebar (reinforcement) and cellular plastic production.

    Method: The methods chosen for the implementation of the thesis were Literature Studies and Interviews. The purpose of the literature study was to educate the authors on the subject and collect various results from current research. The interviews contributed to the necessary information to be able to carry out the analyses at work.

    Findings: The thesis has resulted in a total amount of CO2eq emissions in four different stages in the concrete manufacturing process. Cement proved to be the biggest contributing factor to CO2eq emissions. There are several different measures to reduce CO2eq emissions in the concrete manufacturing process. The measures discussed the most frequently concern the cement production, which is favourable for the concrete production as a whole. The discussion also highlights measures taken in action at a concrete factory level.

    Implications: This study shows that cement accounts for the majority of the total CO2 emissions for concrete production. Therefore, much focus placed on improving the cement production with consideration to CO2 emissions is necessary. This does not mean that less focus should aim on research for green transport, insulation production and steelmaking. All productions stages have potential for improvement. Hence, it is important to continue the research to reduce the total CO2 emissions in the production of prefabricated concrete elements.

    Limitations: The study was limited to the manufacturing process of prefabricated concrete. A specific project HUS F was analysed for CO2 emissions in four production stages; concrete, reinforcement, insulation materials and transport.

  • 22.
    Andersson, Simon
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Sundén, Olof
    Användandet av Level of Development vid projektering: En kvalitativ studie avseende effektivisering av projekteringsprocessen för konstruktörer2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syfte: Att använda byggnadsinformationsmodeller inom byggbranschen har blivit ett allt större tillvägagångssätt för att effektivt projektera inom bland annat konstruktion, arkitektur och installation. Detta tillvägagångssätt har genererat att aktörer inom samma projekt behöver kommunicera mellan varandra angående innehållet av samtligas egna byggnadsinformationsmodeller. Konstruktörer som arbetar med prefabricerad betong får bland annat underlag levererat från arkitekter, installationskonsulter och andra konstruktörer. Studien avsåg att med hjälp av Level of Development förbättra hur projekteringsunderlagen ser ut som levereras till konstruktörer, som arbetar med prefabricerad betong. Studien framlyfter konsekvenserna av underlag som innehåller för lite information för konstruktörers projektering.

    Metod: Studien är genomförd med kvalitativ data. Genom en litteraturstudie lades grunden till problembeskrivningen och mer ingående hur man kan arbeta med Level of Development. Studien är baserad på sju stycken kvalitativa semi-strukturerade intervjuer av personer som har projektering inom konstruktion som yrke. Intervjuerna gjordes i samarbete med Structor Värmland AB, som inriktar sig på prefabricerad betong. Med hjälp av dessa kvalitativa intervjuer kunde erhållen data analyseras från studiens tre frågeställningar.

    Resultat: Resultatet av studien visar att nödvändig information brister när medkonsulter levererar projekteringsunderlag till konstruktörer. Delvis genom att många medkonsulter inte har implementerat BIM och projekterar i 2D samt att underlagen kan innehålla för lite eller för mycket information. Mindre detaljerade underlag tenderar till fler ändringar i konstruktörers projektering, medan överdetaljerade underlag generar onödigt mycket grafik som konstruktörer inte har användning av. Onödig grafik resulterar att modellerna blir långsammare att arbeta i. Utifrån insamlad data återförs rapporten med rekommendationer för att effektivisera konstruktörers projektering. Rekommendationerna innehåller bland annat att konstruktörer bör skaffa sig utbildning inom begreppen BIM och LOD för att kunna ställa krav på hur tillhandahållna underlag från medprojektörer bör se ut.

    Konsekvenser: En standardisering av levererade projekteringsunderlag till konstruktörer bidrar till en mer effektiv projekteringsprocess. Effektiviseringen bidrar till mindre samordning, konflikter i projekteringen samt sparar dyrbar tid. Dock så är Level of Development ett relativt okänt begrepp som har flera olika tolkningar. För att göra projekteringsprocessen mer effektiv behöver konstruktörer ta del av mer information gällande BIM och Level of Development.

    Begränsningar: Rapporten begränsas till projektering med inriktning på prefabricerade betongkonstruktioner. Studien samlar inte in data från medkonsulter, beställare, entreprenörer som arbetar med konstruktörer.

  • 23.
    Andreasson, Elin
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Sparring, Martin
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    MILJÖCERTIFIERINGENS PÅVERKAN PÅ ARBETSGÅNG I STOMBYGGNAD OCH STOMKOMPLETTERING2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: Environmental certifications strengthens a contractors environmental profileand means sustainability in regards to the environment. It is of interest to establishwhich obstacles and differences in workflow that environmental certifications cancause and thereby imply challenges in construction. The purpose with this paper is toexamine what impact the environmental certification Miljöbyggnad Silver has on acontractors work in the construction stage with focus on structure and frameworksupplement.

    Method: To reach the purpose of this paper empirical data have been collected throughinterviews, private documents, and observations of building construction. This researchemploys a qualitative method to get a comprehensive understanding of Miljöbyggnadin construction, where respondents with different occupations and extents of experiencewith Miljöbyggnad have been chosen for interviews.

    Findings: This research shows that the indicators in Miljöbyggnad that mainly have animpact on construction is Moisture safety, Documentation of building material andPhasing-out of harmful substances. The research shows that the biggest differencebetween conventional construction and construction with Miljöbyggnad is the amountof documentation that is needed. Construction with Miljöbyggnad also differsdepending on what occupation one has.

    Implications: The conclusion of this research is that there are no great obstacles withMiljöbyggnad Silver in construction. Indicators from Miljöbyggnad impactsconstruction with additional obligations for site management and does not implicate adifference in already established ones. Recommendations following this research is toinvolve and encourage Miljöbyggnad for everyone involved in construction.

    Limitations: This research is limited to big contractors and the environmentalcertification Miljöbyggnad Silver where focus have been structure and frameworksupplement. Through analyses of indicators and interviews the authors have concludedthat it is structure and framework supplement where impact following Miljöbyggnadexists. The result of this research and its conclusions are considered to apply with othercontractors with similar routines and work flow.

  • 24.
    Andregård, Nellie
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Johansson, Hanna
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    MINSKAT MATERIALSVINN PÅ BYGGARBETSPLATSEN INOM SMÅHUSTILLVERKNING2019Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: Material wastage is a widespread problem in the building sector that affects both the economic and environmental aspects negative. Further research within industrial small house manufacturing is required to develop an information system and investigate the amount of discarded material. Several small house companies use external building contractors which makes it difficult to reduce the amount of waste because the contractors are not economically affected by the amount of material left over. In the case studied there are no guidelines on how the amount of material waste should be fed back and how the small house manufacture should use that kind of experience feedback. There has to be an improved communication between the parties in order to systematically document where the material waste occur and what it depends on.The aim of the essay is to give concrete suggestions on how the experience feedback can be formed between small house companies and building contractors, and how the small house company can adjust their operation method in order to contribute to a reduced amount of material waste.

    Method: The paper is a qualitative study with litterateur, observation and interview study as applied examinations methods. The observation investigated the company’s working methods. In the literature study, scientific articles within waste, knowledge management and Building Information Modelling (BIM), where studied. These theories where later compared with the interviews, which were designed with a low degree of structuring and higher degree of standardization.

    Findings: The study presents that poor quality of the material is the most common experienced sources of material waste. Concrete suggestions on how the experience feedback between small house manufacturer and building contractors can be formed is presented, where photo documentation and weighing of the material are two of the alternatives. That information can in a later stage be used to optimize the company’s additional percentage on the material used to prevent the material from running out of the construction site.

    Implications: The paper results there is a developed system for how deviations for missing material is managed and that there also is a need to introduce it for residual material. Inadequate quality of the material is identified as the largest source of material waste, even calculation errors from quantity take-off are common because it is carried out manually. The additional percentage on material orders is not based on documentation and has potential to be optimized. One way to reduce the amount of material waste is to introduce a wider use of BIM in order to make clash control and quantity take-off.

    Limitations: The thesis is a case study, but the results can be applied in other small house companies with a similar working procedure. The study is delimited from organizational structures with internal builders, which means that the generalization of the results is decreased. The work is also limited from which incentives that is required to motivate the building contractors to use the suggested methods to return the information.

    Keywords: Waste, Construction, Knowledge Management, Quantity take-off and BIM.

  • 25.
    André, Samuel
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Lennartsson, Martin
    Jönköping University, School of Engineering, JTH, Civil Engineering and Lighting Science.
    Elgh, Fredrik
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Exploring the design platform in industrialized housing for efficient design and production of customized houses2019In: Transdisciplinary engineering for complex socio-technical systems: Proceedings of the 26th ISTE International Conference on Transdisciplinary Engineering, July 30 – August 1, 2019 / [ed] K. Hiekata, B. Moser, M. Inoue, J. Stjepandić & N. Wognum, Amsterdam: IOS Press, 2019, p. 125-134Conference paper (Refereed)
    Abstract [en]

    Industrialized house-building (IHB) is a sector offering unique products by adopting an engineer-to-order (ETO) strategy. Customer satisfaction is achieved by adaptation of product solutions and the fast-paced introduction of new technology in combination with short lead-times and cost-efficient production. Product platforms is acknowledged as a strategic enabler for mass customization and increased competitiveness. The strategy has been a necessity in the mechanical industry for several decades. However, for IHB, platforms have only gained interest in recent years. In general, ETO companies struggle with adopting the common product platform approach, set by pre-defined modules and components. Predefinitions require standardization of the product offer which reduces the customization ability which is regarded as a competitive edge. The Design Platform (DP) approach was developed aimed to support ETO companies by utilizing different types of engineering assets in a coherent transdisciplinary model enabling efficient customization. The long-term aim of this work is to investigate and support the DP applicability in IHB to increase efficiency in development and delivery. For this article, data were gathered from a single case study, including workshops with company representatives combined with interviews and document analysis. Based on the data analysis, engineering assets were identified and characterized. Further, a conceptual PLM solution is proposed and outlined to support the DP application combined with the assets. The results suggest that a PLM system can host parts of the DP and that it is applicable in IHB.

  • 26.
    André, Samuel
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Lennartsson, Martin
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Elgh, Fredrik
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    PLM support for the Design Platform in industrialized housing for efficient design and production of customized housesManuscript (preprint) (Other academic)
  • 27.
    Anwia Shlimon, Atrn
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Al Jazar, Ahmed
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    En jämförelsestudie mellan olika ljudisoleringsmaterial i träbjälklag ur ett miljöperspektiv2019Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: The building industry has a big environmental impact. The timber construction can reduce the impact of the industry because timber is an environmentally friendly material. One of the biggest problems with lightweight construction is sound insulation. The aim of this report is to study two floor construction with different sound insulation materials from an environmental perspective. The materials that will be studied in this report are sand and macadam. The aim of the report is to create a clear comparison between these floor layers and to suggest an improvement proposal.

    Method: The methods that have been used in the report are literature studies, life-cycle assessment, document analysis and interview. The LCA, document analysis and literature studies are the starting point, based on these methods, the first two questions in this paper will be answered. Using the interview was able to conduct information for the last question.

    Findings: This study has shown that sand has a less environmental impact than what macadam has. The improvement proposal that has been suggested in this study is using sawdust with sand as sound insulations layer. Decreasing the amount of sand in floors can have a positive effect on the environment.

    Implications: As a conclusion of this paper, it is proven that sand as a sound insulation material is more favorable for the environment than the macadam. The reason is caused by the process of extracting macadam. The process is more complicated and more energy demanding. Another conclusion is that reducing the amount of sand and replacing the missing amount with sawdust can reduce the environmental impact and increase the sound insulation ability. A recommendation for similar papers more abilities could be included in the analysis to provide a more including and fair result.

    Limitations: This paper is limited to investigate sound insulation materials combined with CLT-slabs exclusively. The methods which have been used provided relevant data to help this paper create conclusions. The goal was to create an all-around answer so that the result could be applicable in other analysis.

    Keywords: LCA, sand, macadam, lightweight construction, impact sound insulation, environment.

  • 28.
    Aries, Myriam
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Beute, F.
    LightGreen Wellbeing, Eindhoven, Netherlands.
    Fischl, Géza
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Students in good mood appear slower and less accurate: A pilot study investigating dynamic lighting impact on students’ perception and performance2019In: Proceedings of the 29th Session of the CIE: Washington D.C., USA, June 14 – 22, 2019, Volume 1 – Part 2, Vienna: The International Commission on Illumination, 2019, Vol. 1, p. 1297-1304Conference paper (Other academic)
    Abstract [en]

    Dynamic daylight can provide stimulation throughout the day. Since not all building spaces have access to enough daylight, electric lighting solutions can help substituting. The study investigated the effect of two opposite, daily dynamic light patterns to influence students’ mood and performance. In a mimicked open office space, 20 second-year students participated in a pilot study where they were exposed to light patterns changing in illuminance level over a day and filled out momentary assessments five times. Hierarchical Linear Models were employed to analyse the effect of light level as well as the timing of the exposure. Positive effects are shown for mood, but only for the pattern with a high morning light level. An afternoon boost may come too late to exert benefits. There are indications for performance-enhancing effects by use of dynamic light conditions, even though students seem to be slower and less accurate when in good mood.

  • 29.
    Axell, Robert
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Hellqvist, Gustav
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Införandet av BIM i ett medelstort entreprenadföretag2019Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 30.
    Bahho, Ashorita
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Brodin, Clara
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Integrering av BIM i slutbesikting2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 31.
    Berg Nilsson, Marcus
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Landin, Isabelle
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Development of Ecolodge treehouses: - A field study in Colombia2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: The purpose of this study is to gather, compile and increase of knowledgeabout development of Ecolodge treehouses in tropical climates. It maps how to developa treehouse lodging sustainably in the areas of building technology, installations anddesign.

    Method: This study's methodology consists of planned observations and literaturestudies. The planned observations were performed on two treehouse lodges in thetropical climates of Colombia. The literature studies contain the areas: Ecolodge,Building technology, Installations and Design. The literature is primary collected fromscientific databases, such as Science Direct. When the desired literature was not found,other literature has been used.

    Findings: The standard on the observed treehouse lodges were low, yet fulfilledseveral aspects of the International Ecolodge Guidelines. The guidelines are outdatedand not profound enough to distinguish sustainable lodging. The literature studyindicates that there are sustainable options for the development of treehouse lodgingavailable. However, the natural conditions of the specific case need to be examined toensure that the right choices were made. A summary of the results are found inchapter 5.2 and 5.3.

    Implications: The concept of Ecolodge and its International Guidelines are notsufficiently enough and can easily mislead various stakeholders. It should be up to dateand structured more thoroughly to avoid greenwashing. Highlighting flaws is importantto make sure that the development is lead in the right direction and the study also showsthat there are sustainable options available. The range of scientific studies within thearea is currently very small. Further studies can be done in several directions which inturn can contribute to increased knowledge in the field.

    Limitations: The case study is performed on two cases and unfortunately, they did notgive answers to all the studied aspects. Therefore, comparisons with the literature studywere not possible in a desirable way in these fields. It is difficult to determine how thegeographical location of the cases affects the results, and it is not possible to know ifthe results would have been the same with cases from other parts of the world.

    Keywords: treehouse, building in trees, Ecotourism, Ecolodge, sustainable lodging,Ecolodge guidelines, rainforest, sustainable installations, photovoltaic solar system,wastewater treatment.

  • 32.
    Bertilsson, Richard
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Bäck, Tobias
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Effekten av färgskiftande vertikalljus i en arbetsmiljö2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The human being has developed during the daylight's dynamic variation of color temperature, direction and intensity. The variation positively affects our emotions and performance. The problem today is that we stay about 90% of the day indoors and the indoor lighting often lacks variation. With dynamic colored light, a changeable and stimulating environment can be created to improve future lighting environments. This study has examined how the user's motivation, well-being and concentration are affected by dynamic colored vertical lighting. An environment that quickly would become dull and understimulating, can instead get an interesting variation that makes it usable for a longer time with this lighting solution, without the motivation or well-being decreasing. The lighting solution is intended to be used during time periods as a boost.

    The experiment was divided into two treatments, one with static office lighting designed according to Swedish lighting standard and one where the dynamic colored vertical lighting was added to the regular office lighting. The treatments were performed in a simulated office environment at Jönköpings Tekniska Högskola. The treatment with dynamic colored vertical lighting slowly shifted in light colors through out the whole visible color spectrum on the room's vertical surfaces, to create a variation in the room. During the experiment, the subjects were required to answer questionnaires and performance tests to measure the influence of the dynamic colored light on the subjects well-being and cognitive performance.

    The results showed that the dynamic colored vertical light had a positive effect on motivation and well-being, but did not affect the concentration of the subjects. The positive effect that occurred was when the order of the treatments started with the dynamic colored vertical light and then ended with the regular working light. The conclusion is that dynamic colored vertical lighting can increase the motivation and well-being if it is applied correctly, without adversely affecting the concentration.

    The simulated office environment lacked windows, when scaling up any further research, a real office environment with windows would be preferable. Investigating further whether it is the actual variation of the colored light or the individual colors of the light that creates the effect on the users is also relevant, as this study did not specifically process that.

  • 33.
    Besterman, Beatrice
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineering and Lighting Science.
    Överhem, Ludwig
    Jönköping University, School of Engineering, JTH, Civil Engineering and Lighting Science.
    Konvertering av industrilokaler till bostäder2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: In order to counteract the current housing shortage in Sweden there is a need for alternative ways to create new housing units. Converting the usage of different types of facilities to housing is such an alternative. All around former swedish industrial cities there are empty industrial premises containing a lot of quality. However, there is an issue finding a new usage for these buildings. This study investigates what problems and possibilities that are linked to the conversion of industrial premises in order to find strategies that can help ease the process. Through this the combination of preserving old buildings and creating new housing units is enabled.

    Method: To gather information from previous research within the subject, the first part of our research was literature study. This was complemented with a document analysis and interviews. The documents that were analyzed are from the Swedish National Board of Housing, Building and Planning. The interviews were carried out with developers and architects on three projects where industrial premises has been converted to housing. Besides interviewing people within these projects, an interview with the city architect in Norrköping has been performed.

    Findings: Converting industrial facilities into housing is a costly process where unexpected challenges occur in every project. Many times, there are demands on preserving existing cultural and architectural qualities of a building which complicates the process. Fulfilling demands and regulations of the Swedish building code often leads to expensive solutions when converting facilities into housing. However, the product of this kind of conversion is unique housing units that provide a new expression for the building as well as the area surrounding it. In addition to this, you avoid the emissions and pollutions that are linked with demolishing and re-building on the site. In order to help easing the process of converting industrial facilities to housing units these propositions are given: a new set of regulations for conversions of buildings in to housing, a new law regarding environmental impact and economical subvention for these types of projects.

    Implications: The suggestions that the study has resulted in are much alike what previous research has concluded: there should be a change in the building regulations, especially for conversion to housing. These changes should consider buildings with historical and cultural qualities which should be kept and compare these with the regulations that may conflict. A recommendation for future research is to investigate a proposal for these new regulations.

    Limitations: The study is limited to conversion of industrial premises to housing and the opportunities and problems with such projects. The case study includes three conversion projects which are centrally located and more or less have architectural values. The building regulations which has been focused on is: outdoor environment, noise pollution, accessibility and daylight.

  • 34.
    Björklöf, Angelica
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Davidsson, Ida
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Vägledande belysning på stationsområden: Särskilt utformed för personer med synnedsättning2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report presents a field study of how the platforms are seen during the dark hours by people with and without visual impairment cataract. The field study was carried out with both qualitative and quantitative data as a basis.

    The qualitative data was collected through a visual assessment of the platforms in four out of five station classes that Swedish Transport Administration has. The observations were made with and without simulated visual impairment to provide a comprehensive picture about the orientation and visual comfort for all travelers. Photometric data were collected with an illuminance meter to see how the platform met the requirements for its associated lighting class and whether there was any connection between the illuminance on the surface, and the experience of the environment visually.

     

    The questions answered in this report, if five lighting classes are necessary and how the platforms are experienced by travelers with and without visual impairment. Earlier research on the guidance route and contrasts confirmed the results of the study in which observations of platforms shows that orientation in environments without contrasts between surface colors will be difficult to get around in for people with visual impairment. There is little difference in visual comfort and orientation of the various station classes. The results show that the most important thing for a person with cataract is a uniform illumination and clear guidance route. Without loss of vision it seems that the quality of light and how well maintained the facility is perceived to be affecting the sense of security more than surface colors and light contrasts.

  • 35.
    Blom, Martina
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Landstedt, Sara
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Granskning av 3D-printingens möjligheter vid utformning av byggnader2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: There is today limitations of what is possible to design and in fact produce.

    In industrial construction the focus is on standardization which impedes an individual

    design form, which can be considered an architectural quality. The potential of 3Dprinting

    is growing, which is benefitting design freedom.

    The goal was to evaluate how 3D-printing in Sweden today could increase architects

    possibilities at the design process and be production adapted.

    Method: In a case study at Tengbom in Jönköping, interviews were included with three

    architects. In addition, a literature review, a telephone interview and a focus group

    interview formed the basis of the collected material. As an initial phase, a focus group

    interview was conducted, which resulted in the actors’ opinions about 3D-printing. The

    architect interviews contributed with high credibility regarding architectural qualities,

    which together with the other collection methods gave answers to the studies questions.

    Findings: The study shows that it is possible to print building components in Sweden.

    However it is not possible, with 3D-printing, to produce entire buildings. It can be

    shown that there are obstacles for the introduction of the technology, such as economy,

    Swedish laws and lack of knowledge. These should be reviewed to allow 3D-printing

    as a manufacturing method. With Rapid Ornament Production larger architectural

    qualities will conduce to, where 3D-printing allows unique solutions. Solutions no other

    technology can achieve.

    Implications: Customized and varied buildings can be achieved thanks to 3D-printing.

    Building components such as light weight walls, ornaments and details can be produced

    in Sweden today. One advantage of 3D-printing as a technology, is that it provides

    greater freedom between design and production. For further development of 3Dprinting

    a greater knowledge is recommended for industry stakeholders, regarding the

    drawing tools as well as the 3D-printing technology.

    Limitations: The result is applicable to architects, working at architectural offices

    similar to Tengbom in Jönköping. There have not been deeper studies regarding of

    printing technologies, finances, materials, time or law. A case study as research strategy

    entails an interpretation of the opinions, which limits the generalization of the results.

    Keywords: 3D-printing, design, production, architectural qualities, possibilities,

    limitations, industrial construction.

  • 36.
    Boo, Johan
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Magnusson, Nils
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Hållbar dagvattenhantering i brant terräng: En fallstudie av ett planerat bostadsområde i Gränna2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: The continuous densification of urban environments with an increased amount of hard surfaces as a result, along with future climate change, involves a number of challenges that must be taken into account when applying a sustainable stormwater management. In addition to this, there are several other challenges that needs to be considered when planning for a sustainable stormwater management in residential areas located in steep terrain where an increased water volume and water velocity increases the risk of floods and contributes to an increased level of contamination in the runoff.

    This study aims at identifying suitable stormwater solutions for residential areas located in steep terrain.

    Method: The methods used to achieve the objective of the thesis have been literature review, document analysis, qualitative interviews and calculations. A case study of a planned residential area in Gränna, Jönköpings municipality, has been conducted and resulted in the gathering of empirical data.

    Findings: Geophysical, social, economic and legal factors must be taken into account when implementing sustainable stormwater management and in order to best prevent damage caused by floods of buildings and facilities.

    The application of sustainable stormwater solutions to delay and purify water is important where steep terrain leads to large stormwater flows, in order to reduce the risk of floods and the pollution levels in recipients caused by erosion. No single measure is sufficient to fully address the present risks, but by using a combination of open stormwater facilities and infiltration technologies, pollution levels in the drainage and flooding problems can be drastically reduced.

    Implications: The knowledge, and in some extent the will, among Swedish municipalities to implement sustainable stormwater management needs to be strengthened. In the case of construction of new residential areas in steep terrain, enclosed areas should not be exploited but instead be used as a designated area for excess of stormwater. Infiltration methods should be used in combination with open stormwater facilities to better handle the rain with varying recurrence and to reduce erosion damage.

    Limitations: The case study has served as a practical example and the calculations are not generally valid, although with some adjustments they can be applied in similar areas. The results of the literature review and interviews can be applied to residential areas in other Swedish municipalities where the terrains results in an increased water velocity.

    Keywords: Best management practice, erosion, infiltration, low impact development, steep terrain, stormwater pond, stormwater swale, sustainable stormwater management.

  • 37.
    Borg, Robert
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Sperling, Jakob
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    BIMS PÅVERKAN PÅ TIDIGARE ARBETSMETODER2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: Digitalization has progressed with big steps in the recent decades. This has been reflected in the construction industry where “Building Information Modeling” has been implemented. The implementation has entailed some complications for designers, existing established working methods are opposed to new software and digital instruments. There are also differences in skills between the designers who have worked long in the industry and those who are newly graduates. Those who have a long working experience do not have as high digital competence as the newly graduated but they have a much broader practical knowledge. The purpose of the study is to analyze how the implementation of BIM has affected constructors about their professional/technical competence and to develop measures to increase the digital competence so that constructors can fully utilize their professional competence.

    Method: The method used in this study is interviews. The study will be carried out through qualitative methods where the interviews are semi-structured. Several interviews have been conducted at two consulting offices in Uddevalla and Trollhättan. The interviewees are constructors with experience of construction before BIM and constructors with experience of BIM from their education.

    Findings: The study shows what factors that have contributed to difficulties in the working method BIM. Digitalization in general has affected the workflow that constructors carry out because they replace old habits. The construction industry is constantly changing, and older constructors can adapt to the system by training. This creates difficulties, which means that they require help from employees with a better digital competence. A higher digital competence is necessary to keep up with the incubation. Therefore, through good leadership, you should help older constructors, this is done by motivating them to learn how to use software to design, communicate and organize.

    Implications: There is a lack of digital competence in several constructors without education of BIM. There are also complications between constructors due to differences in skills and different perspectives on their problem solving. The study proposes that a BIM-coordinator is needed to steer the implementation of BIM in the right direction in a company and that a broader investigation must be carried out.

    Limitations: The report’s survey method was only limited to one company in addition to two offices, which meant that the perspective in the study was limited. The study focuses more on identifying the problem and finding a solution to the problem, it does not focus on how the measures should be carried out and what consequences this would have on a company.

  • 38.
    Bosch, Petra
    et al.
    Chalmers University of Technology.
    Isaksson, Anders
    Chalmers University of Technology.
    Lennartsson, Martin
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Linderoth, Henrik
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Hinder och drivkrafter för BIM i medelstora entreprenadföretag. SBUF-rapport 130692016Report (Other academic)
  • 39.
    Bosch-Sijtsema, Petra
    et al.
    Department of Architecture and Civil Engineering, division Construction Management, Chalmers University of Technology, Gothenburg, Sweden.
    Isaksson, Anders
    Department of Technology Management and Economics, division of Innovation and R&D Management, Chalmers University of Technology, Gothenburg, Sweden.
    Lennartsson, Martin
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Linderoth, Henrik
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Barriers and facilitators for BIM use among Swedish medium-sized contractors: We wait until someone tells us to use it2017In: Visualization in Engineering, ISSN 2213-7459, Vol. 5, no 3, p. 1-12Article in journal (Refereed)
    Abstract [en]

    Background: The pace of diffusion of BIM (Building Information Modelling) use is considered to increase with governmentalinitiatives in which public clients in countries like Finland, Singapore, United Kingdom, and Sweden begin requiring BIM as apart of the project delivery. Currently, larger contractor firms use BIM to a certain extent. However, BIM use by mid-sizedcontractor firms (that is, firms with 50–500 employees that can successfully compete with larger contractors on projects costinga maximum of 50 million Euros) is relatively unknown. Hence, the aim of the paper is to explore current use and perceivedconstraints and driving forces of BIM-implementation with respect to mid-sized contractors.

    Methods: A mixed method approach was applied, and data was collected through an interview study and a survey involvingchief executive officers or their closest sub-ordinates in mid-sized contractor firms in Sweden. The survey was based on atechnology-, organization-, and environment framework that is used in information systems research to study the use of inter-organizational information systems. The total population of firms in the survey corresponded to 104. The study presented thepreliminary results based on 32 answers (with a 31% response rate).

    Results: Fifty-eight percent of the surveyed respondents stated that they had been involved in a project in which BIM wasused in some manner. The most commonly used application included visualization, which also facilitates coordination andcommunication. The biggest perceived constraints involved partners that did not use BIM, lack of demand from clients, andthe absence of internal demand in the company. With respect tothe two last obstacles, significant differences existedbetween users and non-users. The most common perceived driving forces included the fact that BIM is perceived as ameans to follow technical development and that BIMprovides competitive advantages to the company.

    Conclusions: It is concluded that the main driver responsible for BIM-implementation is mainly determined by anindividual’s subjective positive or negative evaluation of BIM, instead of external pressure from clients and partners or by theinternal capacity and knowledge to use BIM.

  • 40.
    Bremner, Craig
    et al.
    Charles Sturt Univ, Design, Bathurst, NSW, Australia.
    Bernadet, Laura
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    The Museum of the Future: a sedimentary cloud2017In: Design journal, ISSN 1460-6925, E-ISSN 1756-3062, Vol. 20, no Suppl. 1, p. S3560-S3568Article in journal (Refereed)
    Abstract [en]

    Taking our cue from the impact of Joseph Kosuth’s 1965 conceptual artwork One and Three Chairs, there has always been one and three museums-the cosmos is the museum of light, the city is the museum of space and given the job of the museum is to indefinitely accumulate time the museum today is the museum of time. In this paper we present a fourth-the museum of the future. The museum and the department store were concurrent designs of industrialization; one-the store-collected the here-and-now and sold it as what-might-become while the other-the museum-collected what-was and projected it as what-we-have-become. However, the manifest crises of the planet illustrate the limits of our capacity to persuade ourselves we can imagine a future in which we want to live, and cast urgency on the long-term design project of being together. And the project of being together in the urban age is driving us to change the entire terrain of thought and action. Where once ideas drove change, change now appears to be split between two projects whose temporal dimensions govern the notion of ‘future’. One is the busy sharing of digital records of the as-found, and counter to this digital archive is the revival of designs of what-might-become illustrated in the boom in digital imagery of fantasy futures. In order to now imagine a future it has become necessary to navigate the competing time frames of the digital archiving of the past and the digital reproduction of the future. But for Jacques Derrida the question of the archive is not a question of the past but a question of the future, the very question of the future, of a response, of a promise and of a responsibility for tomorrow. According to him “the archive-if we want to know what this will have meant we will only know tomorrow.” And Hal Foster disconnects the archive from the museum when he questions “Might visual culture rely on techniques of information to transform a wide range of mediums into a system of image-text-a database of digital terms-an archive without museums?” In this paper we propose this temporal disjuncture-archive and future-can be bridged by the design of what we call the Museum of the Future whose windows open onto the permanent present. The Museum of the Future is not a location for the sentimental accumulation of time in the form of tasteful objects. According to Cedric Price “neither knowledge nor value can be stored and contained in a particular place” therefore “the museum of the future initiates a process of constant revision that assures the contingency and non-solidity of a building”. Following from Price we propose the Museum of the Future is a continuous interior whose form, stretched to compass the cumulous cloud of digital sentimentality and reproduction, functions as a sedimentary layer for our imaginings of increasingly populous and proximate future relations.

  • 41.
    Bäckstrand, Jenny
    et al.
    Jönköping University, School of Engineering, JTH, Supply Chain and Operations Management.
    Lennartsson, Martin
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Customizations vs. Platforms: A Conceptual Approach to COSI2018In: Advances in Production Management Systems. Production Management for Data-Driven, Intelligent, Collaborative, and Sustainable Manufacturing. APMS 2018. / [ed] I. Moon, G. Lee, J. Park, D. Kiritsis & G. von Cieminski, Cham: Springer, 2018, p. 116-123Conference paper (Refereed)
    Abstract [en]

    In recent years, many manufacturers have experienced an increased demand for customized products and services, which requires the manufacturer to simultaneously offer both standardized and customized products. Consequently, several manufacturing strategies must be efficiently employed. These companies do not express the same prerequisites as ‘pure’ ETO companies since they need to be able to differentiate customized orders from standard orders, but also be able to differentiate between the manufacturing dimension and the engineering dimension of customization. Whereas standard orders can be processed with a platform approach, the customized orders contain specific requirements and information represented by ‘customer-order specific information’ (COSI). This paper defines and presents competitive scenarios where platform constraints are combined with COSI for efficient customizations. Implications for the approach and a path forward is discussed.

  • 42.
    Bönke, Michaela
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Gustafsson, Daniel
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Ljus, ett samspel mellan visuell perception & rörelse2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Light comprises our visual perception that lets us experience and understand our surroundings. By studying how light affects us, our physical and emotional experience, the knowledge can be used as a tool within performing arts. The interaction between physical elements, the director, choreographer, and the performer on stage encompasses the final result. As a part, more consideration should be given to how us humans integrate, navigate and get affected by light. Regardless of the environment or conditions, light always has a natural position as an influential factor. The fact that light with its qualities could work aesthetically and functionally as a guiding feature is something that could be considered to work interdisciplinary. I.e. used in the composition of the stage narrative, or in the design of urban environments. In this study, thirteen professional dancers are seen in a lighting laboratory in three different lighting scenes. The experiment aims to see how different light scenes affect movement, as well as create an understanding of what establishes the ruling behaviour. To examine these factors, a positioning system is used, as well as half structured interviews. The results show that light and the shifting of light affects the performer on stage in a way that influences the movements and inspires the exploration of given space. The overall results show that a pattern can be found to present how the participants move in the room and the differences between how the room is utilised depending on the particular lighting scenes. The positioning system discovered that the light leads the improvised dance to a great degree and these findings were later confirmed by the interviews. What the dancers visually perceive influences how they interpret the given space which, furthermore, influences their movement.

  • 43.
    Cerek, Stefan
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Zaklan, Amer
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Loggbokshantering angående byggmaterial inom byggbranschen med hjälp av digitala verktyg2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose: Today, there is no law in Sweden that material documentation must be carried out at new constructions. The advantages of providing material documentation also called logbook is that it creates an opportunity to trace health or environmentally hazardous substances in the buildings. Studies have shown that some substances are identified as hazardous to health or the environment over time. The logbook's advantages have led to the government giving the housing and construction authority the task of drafting a proposition on requirements for carrying out material documentation for new buildings. The difficulty with the current system and the current procedure is that no standardized approach exists on how a logbook should be conducted. The aim of the work is to make a study on how documentation and management of logbooks is done. Based on the studies then come up with an alternative procedure.

    Method: The work has a qualitative approach and is implemented in combination with three qualitative methods; literature study, interviews and document analysis. The literature study provided information and knowledge about the area in question, which also led to the qualitative interviews being conducted in a proper manner. The respondents work in larger companies in the construction industry with quality, environment and work environment issues and production. The document analysis provided information and knowledge to implement the interviews and to answer the study’s questions.

    Findings: Based on the gathered material, the management of the logbook takes places in different types of digital systems. The current working method is done by using a system or using different systems at the same time, which can result in a non-optimal working procedure. Therefore, the construction industry is demanding a standardized system. Improvement potential exists in today's working procedure with the logbook. By digitizing the working method in combination with the three different digital tools, Radio Frequency Identification (RFID), Building Information Modeling (BIM) and Blockchain, the defects can be avoided.

    Implications: Consensus is needed among the various participants in the construction industry regarding which system they should use to keep the logbook at desired quality. The already available digital tools that can be used to facilitate the work process and logbook is not fully used at the moment.

    Limitations: The references and theories used in the work are from different parts of the world. These were used to see how they might be applied in the Swedish construction industry. The logbook type that has been investigated is aimed at building materials and its containing substances. The study has not investigated whether the various digital tools can be used in practice only in theory. 

  • 44.
    Chraibi, S.
    et al.
    Philips Lighting B.V., Eindhoven, the Netherlands.
    Creemers, P.
    Department of the Built Environment, Building Lighting Group, Eindhoven University of Technology, Eindhoven, the Netherlands.
    Rosenkötter, C.
    Department of the Built Environment, Building Lighting Group, Eindhoven University of Technology, Eindhoven, the Netherlands.
    van Loenen, E. J.
    Department of the Built Environment, Building Lighting Group, Eindhoven University of Technology, Eindhoven, the Netherlands.
    Aries, Myriam
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Rosemann, A. L. P.
    Department of the Built Environment, Building Lighting Group, Eindhoven University of Technology, Eindhoven, the Netherlands.
    Dimming strategies for open office lighting: User experience and acceptance2019In: Lighting Research and Technology, ISSN 1477-1535, E-ISSN 1477-0938, Vol. 51, no 4, p. 513-529Article in journal (Refereed)
    Abstract [en]

    Sensor-triggered control strategies can limit the energy consumption of lighting by considering the presence of users in the office and dimming lighting down when it is not needed. In multi-user offices, the application of occupancy-based dimming at room level limits the energy saving potential. However, zone- or desk-based dimming may affect the comfort of co-workers due to its dynamics. This paper reports the assessment by 17 participants (30–50 years of age) of occupancy-based dimming in a mock-up office, using different dimming speeds. Participants consisted of co-workers experiencing changes triggered by others, and actors triggering these light changes. While the participants performed an office-based task, the luminaire above the actors’ desk was dimmed from approximately 550 lx to 350 lx (average horizontal illuminance), and vice versa. The participants evaluated the dimming conditions regarding their noticeability and acceptability. The study showed that the noticeability of light changes due to dimming, increases when fading times become shorter. Dimming with a fading time of at least two seconds was experienced as acceptable by more than 70% of the participants. The results of this experiment provide insights to system behaviour that does not compromise user experience while addressing energy efficient use of electric lighting.

  • 45.
    Chraibi, Sanae
    et al.
    Philips Group Innovation, Research, Eindhoven, Netherlands.
    Lashina, Tatiana
    Philips Group Innovation, Research, Eindhoven, Netherlands.
    Shrubsole, Paul
    Philips Group Innovation, Research, Eindhoven, Netherlands.
    Aries, Myriam
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science. Eindhoven University of Technology, Eindhoven, The Netherlands.
    van Loenen, Evert
    Philips Group Innovation, Research, Eindhoven, Netherlands.
    Rosemann, Alexander
    Eindhoven University of Technology, Eindhoven, The Netherlands.
    Satisfying light conditions: a field study on perception of consensus light in Dutch open office environments2016In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 105, p. 116-127Article in journal (Refereed)
    Abstract [en]

    Workplace innovation has been changing the European office landscape into mostly open spaces, where enhanced interaction between people is combined by efficient use of space. However, challenges are found in offering individual preferred conditions in these multi-user spaces, especially when dealing with shared systems.

    Previous studies clearly show the benefits of personal control as a means to achieve individual preferred lighting. Most of these benefits were demonstrated in private offices or situations where users have a “personal” light source.

    Lighting systems in open offices are often designed as a regular grid of luminaires to deliver uniform lighting. This often results in a luminaire grid that does not match the desk arrangement, making it challenging to offer personal lighting controls. By grouping luminaires, users could be offered consensus control. The question is whether consensus control brings advantages rather than disadvantages.

    This paper presents the results of a field study evaluating consensus light control in an open office 14 users experienced a reference no-control condition and a condition with control over a zone of luminaires. Data was collected by objective measurements as well as subjective surveys and interviews.

    This study shows that consensus control in an open office improves satisfaction of individual users with the light quantity and quality. Even though the controllable light is shared, consensus among users results in an improved lighting environment for the majority of users. Selected illuminances in the condition with controls were on average lower than in the reference condition, resulting in lower energy usage by lighting.

  • 46.
    Clemén, Robin
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Lundgren, Marcus
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Bostadens förändringar: De boendes egna idéer2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 47.
    Dahir, Ahmed
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Collazos, Kenny
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Erfarenhetsåterföring: Erfarenheterna som bör återföras till projekteringsskedet av installationer2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 48.
    Davoodi, Anahita
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science. Department of Architecture and Built Environment, Lund University.
    Lighting simulation for a more value-driven building design process2016Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Concerns about global warming are increasing, hence, the urgency to cut carbon emissions. Reducing energy consumption, including lighting energy, is seen as the primary solution. Yet, solving the environmental factor should not come at the cost of other pillars of sustainable development. Rather, maximizing the total value of the building should be the focus. Maximizing value in the context of lighting entails improving the quality of the lighting. This study has investigated how lighting simulation could help in achieving better lighting quality. The aim of the thesis was defined as to understand the underlying architecture of lighting simulation and obtain an overview of its characteristics and applications as well as to study the use of current simulation tools.

    The theoretical background of lighting simulation (in the domain of Systems Engineering) was reviewed from the literature. This revealed the missing and imperfect links in the solution-to-value chain. The thesis suggests the use of a new base metric, Retinal Illuminance Map, as a solution, which in combination with black box simulation of a visual system can help repair this incomplete chain.

    The study of the current lighting simulation tools (Paper 1) revealed that illuminance-based metrics, luminance-based metrics, daylight availability metrics, and glare indexes are the most available performance metrics in existing lighting simulation tools. Based on usability, acceptability, availability, and previous references in the literature six software programs (Radiance, DAYSIM, Evalglare, DIALux, VELUX, and VISSLA) were selected and compared. It was found that no single tool could meet all the needs of a designer, hence, simulation tool(s) should be selected (or combined) according to the requirements of project goals and the stage of design.

    Building on these studies, applications of lighting simulation were identified and compiled in relation to different aspects, including performance metrics, stages of design, optimization, model integration, BIM, and parametric modeling.

    To obtain first-hand information about lighting designers’ experience, an online survey was conducted in Sweden (Paper 2). The results showed that lighting simulation programs were widely (90%) used in Sweden for analysis and/or rendering purposes. The majority of lighting designers considered both daylight and artificial light in their design. Factors such as ease-of use, simulation time and training had more weight than accuracy and the diversity of metrics in practitioner’s eyes. Surrogate modeling was identified as a solution for speeding up simulation time, which would also enable exploration of design solution space especially in the early design stage.

  • 49.
    Davoodi, Anahita
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineering and Lighting Science.
    Johansson, Peter
    Jönköping University, School of Engineering, JTH, Civil Engineering and Lighting Science.
    Aries, Myriam
    Jönköping University, School of Engineering, JTH, Civil Engineering and Lighting Science.
    The use of lighting simulation in the evidence-based design process: A case study approach using visual comfort analysis in offices2019In: Building Simulation, ISSN 1996-3599, E-ISSN 1996-8744Article in journal (Refereed)
    Abstract [en]

    The EBD-SIM (evidence-based design, simulation) framework is a conceptual framework developed to integrate the use of lighting simulation in the EBD process to provide a holistic performance evaluation method. A real-time case study, executed in a fully operational office building, is used to demonstrate the framework’s performance. The case study focused on visual comfort analysis. The objective is to demonstrate the applicability of the developed EBD-SIM framework using correlations between current visual comfort metrics and actual human perception as evaluation criteria. The data were collected via simulation for visual comfort analysis and via questionnaires for instantaneous and annual visual comfort perception. The study showed that for user perception, the most crucial factor for visual comfort is the amount of light on a task area, and simple metrics such as Eh-room and Eh-task had a higher correlation with perceived visual comfort than complex performance metrics such as Daylight Autonomy (DA). To improve the design process, the study suggests that, among other things, post-occupancy evaluations (POEs) should be conducted more frequently to obtain better insight into user perception of daylight and subsequently use new evidence to further improve the design of the EBD-SIM model.

  • 50.
    Davoodi, Anahita
    et al.
    Jönköping University, School of Engineering, JTH. Research area Built Environment.
    Johansson, Peter
    Jönköping University, School of Engineering, JTH. Research area Built Environment.
    Enger, Johanna
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Comparison of lighting simulation tools with focus on lighting quality2014Conference paper (Refereed)
    Abstract [en]

    By the rise of concerns for global warming, reducing emissions via lowering energy consumption has become a necessity in every sector and the lighting sector is no exception. However, it should not come at the cost of lighting quality and user comfort which is a common practice in today’s lighting design and energy reduction initiatives. The “energy reduction” view should change toward “value driven optimization” in which energy reduction is balanced against lighting quality and user comfort for optimization of the total value of the building. As the use of IT technology grows in lighting design, constant reviews of the software tools are necessary in order to evaluate their performance and ability to design value driven lighting.The main objective of this paper is to compare different lighting simulation tools with respect to their ability to simulate lighting quality both artificial and daylight. The indicators for the comparison are defined based upon findings from another project “criteria for good lighting quality” that is currently being conducted at the same university. First, current numerical metrics for lighting quality are summarized. Then, different simulation tools are evaluated based on a literature study. The outcome of this research summarizes the strength and shortcomings of a number of simulation tools.

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