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  • 1.
    Abdul Gabar, Allan
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Protic, Dennis
    Halmstad University, School of Business, Engineering and Science.
    Kartläggning av arbetsledarens arbetsfördelning i byggproduktion: En undersökning av möjliga förbättringar inom yrkesrollen2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Every company strives for maximum efficiency. The construction industry, which is complex while margins are small, makes efficiency an important issue. In the construction industry today,the high demand for production is to be delivering high quality projects as well as within certain timeframes. In order for this to be achieved, there is a great demand for work management in production. Therefore, we have chosen to analyze improvement areas within the supervisor’s role.The purpose of this report is to investigate the supervisor’s situation in the construction industry.Furthermore, the purpose is to identify work-related tasks in the professional role that have the potential for efficiency enhancement.A frequency study has been conducted in three different workplaces where we have followed three different supervisors for a total of nine days to get an insight into how the supervisors spend theirtime. Interviews have been conducted with supervisors for an even broader view of the study. Literature search has been made where we have found theories that we also present. During the course of the study we have found that there are a few improvement areas. As an enhancement, we think digitalization should be implemented, and everyone should keep order and clean up afterwards, more feedback to employees, and develop communication.

  • 2.
    Abdulhalim, Mohammed
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Angmyr, Sebastian
    Tillämpning av Partnering vid ombyggnad av bostäder: Vad krävs för ett framgångsrikt partnering projekt?2013Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 3.
    Abrahamsson, Mickael
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Berg, Simon
    Halmstad University, School of Business, Engineering and Science.
    Tillfälliga modulhus - en ekonomisk och kvalitetsmässig analys2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The populations of Sweden are right now facing an acute housing shortage. One of the reasons of this is the huge amount of immigrants that have been taken in over recent years. The construction industry hasn’t been able to keep up with the rising demand and is right now looking for a solution. Modular housing is one solution that has been proposed by Boverket, the national board of housing, building and planning as it reduces construction times. The purpose of this paper is to analyze this method and the potential consequences/gains it has. In this paper we have used three different case studies were we have done 3 interviews in each.   This research concludes that the problem doesn’t lie within the quality or the costs associated with modular housing. It lies within the temporary building permits that are often used when time is of the essence. 

  • 4.
    Abrahamsson, Victoria
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Eckerberg, Christopher
    Halmstad University, School of Business, Engineering and Science.
    Insourcad polsk arbetskraft i svensk byggindustri: En studie utifrån NCCs arbetslednings perspektiv2018Independent thesis Basic level (university diploma), 12 HE creditsStudent thesis
    Abstract [en]

    The need for labor in the construction sector is today greater than the supply. As a result, several companies use foreign labor, which constitutes challenges. Previous studies highlight that problems can arise mainly in the categories of cultural differences, communication, security, quality and time.

    The purpose of this study is to investigate issues of foreign labor from the perspective of managers. Furthermore, the study aims to highlight positive effects with insourcing, a difference to previous research where the workforce has been external.

    The study is conducted through qualitative methodology where review of existing literature has highlighted apparent issues to handle. In addition, semistructured interviews where conducted with the case company management team to investigate experienced issues as well as the impact of the insourcing strategy. The analysis and discussion of the interviews results in a list of improvement suggestions for companies using foreign labor. A general conclusion is that insourcing is beneficial to construction companies using foreign labor, as it provides continuity and improved opportunity for development and guidance. Furthermore, the education and development of the workers is easier to follow up.

  • 5.
    Adiego Abad, Sonia
    Halmstad University, School of Business and Engineering (SET).
    Degree project:HOSTEL2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    A construction project including planning, cost estimation and design of a Hostel on a property in the city of Halmstad.

  • 6.
    Afkari, Arash
    Halmstad University, School of Business and Engineering (SET).
    Sustainable Low-Cost Housing in Ethiopia: A Study of CSSB-Technology2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This degree project is about sustainable low-cost housing in Ethiopia with a focus on CSSB-technology, which is one method of constructing houses. The project allowed me to visit Ethiopia during seven weeks in 2010, to observe, gather information and to perform tests regarding the specific subject. It is a sub-project to a larger research project initiated in 2002 at Halmstad University in an attempt to introduce low-cost housing technologies for the Kambaata Region in Ethiopia. The aim of the research project has been to develop and test new, sustainable, low-cost building technologies intended for the population, with regard to local traditions, needs and affordability.

  • 7.
    Al Nasseri, Hammad Abdullah
    et al.
    Lund University, Lund, Sweden & Sultan Qaboos University, Al Khoudh, Sultanate of Oman.
    Widén, Kristian
    Lund University, Lund, Sweden.
    Aulin, Radhlinah
    Lund University, Lund, Sweden.
    A taxonomy of planning and scheduling methods to support their more efficient use in construction project management2016In: Journal of Engineering, Design and Technology, ISSN 1726-0531, E-ISSN 1758-8901, Vol. 14, no 3, p. 580-601Article in journal (Refereed)
    Abstract [en]

    Purpose: The implementation and control processes of project planning and scheduling involve a wide range of methods and tools. Despite the development and modification and integration of the project management theory with newer scheduling approaches in particular, practitioners’ views on the efficiency and effectiveness of these methods and tools differ. This situation can be attributed in part to a lack of understanding of the most appropriate basis for implementing these methods and tools. This study, therefore, aims to overcome this deficiency by conceptualizing and adopting a taxonomy of planning and scheduling methods.

    Design/methodology/approach: The study is based on a review and discourse analysis of the literature covering a large number of theoretical and empirical studies. The underlying theories of various planning and scheduling methods were analyzed with respect to the taxonomy criteria adopted in the study.

    Findings: Using the taxonomy, the key characteristics of planning and scheduling methods considered in this study were identified and interpreted. These included concepts and theories; key features; suitability and usability; and benefits and limitations. Overall, the findings suggest that project managers should consider taxonomy as a support tool for selecting and prioritizing the most appropriate method or combination of methods for managing their projects. Recommendations include the need for more advanced or multi-dimensional taxonomies to cope with the diversity of project type and size.

    Originality/value: The results of the study allow project managers to improve their current practices by utilizing taxonomy when considering the implementation of planning and scheduling methods. Moreover, taxonomy can be considered as a tool to promote learning on the part of those less experienced in planning and scheduling. Taxonomy can be considered as an initial platform for further research in this area. © 2016, © Emerald Group Publishing Limited.

  • 8.
    Albertsson, Anton
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Skoglund, Lukas
    Halmstad University, School of Business, Engineering and Science.
    Rullarmering: Att adoptera en armeringsmetod2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Rebar carpet is an innovation that favors the working environment of the rebar workers and saves time. Reinforcement workers today are a vulnerable group. Heavy lifts and backbreaking postures are a part of their everyday work. It is already established that work with rebar carpets is both time-saving, economically beneficial and from a working environment point of view better than traditional reinforcement work. Despite all benefits it is used in rather few projects today.

    The purpose of this study is to identify how the construction industry embraces new innovations related to in situ concrete with post-tensioned reinforcement. The goals are to find out how designers, contractors and manufacturers are working to adopt rebar carpets in the construction process and to shed light on, factors affecting the adoption.

    The study is based on semi-structured interviews with designers, contractors and a representative of a rebar manufacturing company.

    Designers and contractors have not, generally speaking, been actively working to adopt rebar carpet. The governing factors for the use of rebar carpets is the designers and contractors knowledge and previous experience of rebar carpet. The contractors who have previous experience of rebar carpet can imagine using rebar carpet again and contractors with no previous experience believe that they need more knowledge of rebar carpet before they dare to try. Design engineers who have designed for rebar carpet before has it in mind when they design other projects. Designers who have no previous experience of rebar carpet demand more knowledge about how they can facilitate the use of rebar carpet.

  • 9.
    Algeröd, Oskar
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Davidsson, Tobias
    Halmstad University, School of Business, Engineering and Science.
    Hållfasthet i helväggselement av cementbunden träull2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Cement bonded wood-wool as external walls have been used around the world since the 1980s. They can have different appearances, wood-wool slabs connected to each other into larger wall elements that are raised between concrete columns and beams. Another type is hollow wood-wool blocks that are stacked on each other and filled with concrete to make an external wall. In 2004 a new building system was launched in Sweden, large prefabricated wall elements of wood-wool. They are connected to each other with concrete columns and beams integrated in the elements to make an external wall. This report is looking into if the concrete beams and columns for the building system are needed. In the report three different tests were made to get the mechanical properties of the prefabricated wood-wool elements. Results showed that there was a large different in the density between the wall elements and it also showed that the modulus of rupture varied between 0.248-0.449 MPa on three identical wall elements. The characteristic modulus of rupture was three times higher than documented in previous reports of a similar wall. The conclusion of this report is that the concrete beams and columns should still be in the wall system.

  • 10.
    Alinaitwe, Henry Mwanaki
    et al.
    Makerere University, Kampala, Uganda.
    Widén, Kristian
    Lund University, Lund, Sweden.
    Mwakali, Jackson
    Makerere University, Kampala, Uganda.
    Hansson, Bengt
    Lund University, Lund, Sweden.
    Innovation Barriers and Enablers that Affect Productivity in Uganda Building Industry2007In: Journal of Construction in Developing Countries, ISSN 1823-6499, E-ISSN 2180-4222, Vol. 12, no 1, p. 59-75Article in journal (Refereed)
    Abstract [en]

    The construction industry has of recent been blamed for lack of innovation. Lack of innovation in the industry is believed to be responsible for the decreasing or stagnant levels of productivity in comparison with other industries. This paper reviews the major barriers and enables to innovation in general. Propositions were made about the factors that affect innovation in the construction industry which were then formulated into a questionnaire. A survey was made on building contractors in Uganda, a developing country, targeting those with financial strength, large in size, and with high capacity to carry out big projects. The identified factors were then ranked and correlated. The level of training in science, engineering and technical education, and the level of research and development at the industry level are looked at as the greatest innovation enablers in building that will drive forward labour productivity. The size of the domestic market and the level of security are the worst innovation barriers that lead to low productivity in the building industry in Uganda. Contractors, policy makers and the government should address the identified factors in order to improve productivity.

  • 11.
    Alinaitwe, Henry
    et al.
    Makerere University, Kampala, Uganda.
    Widén, Kristian
    Lund University, Lund, Sweden.
    Mwakali, Jackson
    Makerere University, Kampala, Uganda.
    Hansson, Bengt
    Lund University, Lund, Sweden.
    Building firm innovation enablers and barriers affecting productivity in Mwakali and Taban-Wani2006In: Advances in Engineering and Technology: Proceedings of the First International Conference on Advances in Engineering and Technology 16-19 July 2006, Entebbe, Uganda / [ed] Jackson A. Mwakali & Gyavira Taban-Wani, Oxford: Elsevier, 2006, p. 268-276Conference paper (Refereed)
  • 12.
    Allerbo, Emma
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Waldemarsson, Hanna
    Halmstad University, School of Business and Engineering (SET).
    Adobe - Technology of Everybody: Low Cost Housing in Ethiopia2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The traditional building techniques in Ethiopia today contain a lot of wood. Because ofdeforestation the forest cover in the country has been decreased. A part of a solution would bethe exclusion of wood in construction and then the adobe technology is a good alternative. Adobe technology involves blocks made from local soil that mixed with water and straw asreinforcement. The sundried blocks can be bricked up to walls. As mortar the same wetmixture can be used.

    This report contains analyzed soil characteristics in the high altitude located Asella region todetermine its suitability for adobe blocks. The design of a kindergarten in Alem Maya is alsocarried out.

  • 13.
    AlNasseri, Hammad Abdullah
    et al.
    Lund University, Lund, Sweden.
    Widén, Kristian
    Lund University, Lund, Sweden.
    Aulin, Radhlinah
    Lund University, Lund, Sweden.
    Towards a Taxonomy of Planning and Scheduling Methods in the Context of Construction Management2013In: Proceedings from 7th Nordic Conference On Construction Economics And Organisation 2013: Green Urbanisation – Implications For Value Creation / [ed] Ole Jonny Klakegg, Kari Hovin Kjølle, Cecilie G. Mehaug, Nils O.E. Olsson, Asmamaw T. Shiferaw & Ruth Woods, Trondheim: Akademika forlag, 2013, p. 570-581Conference paper (Refereed)
    Abstract [en]

    Planning and scheduling are considered as one of the most difficult but most important processes from perspectives of project management. These processes involve implementation of a widerange of planning methods used by different organizations with various levels of planning knowledge. The planning methods for scheduling can be classified as traditional methods (e.g. line of balance, Gantt chart and critical path) and modern methods (e.g. last planner and critical chain). Over time these methods had advanced from paper based to computer based. However, some project planners still prefer using the traditional methods despite other new alternatives. Users of those methods have different perspectives about the efficiency and effectiveness of the different planning methods used to manage different projects. Evidences from the secondary data found from extensive literatures have been used to assess the planning and scheduling methods mentioned above. A taxonomy describing each of the method in terms of their theories, key features, application areas, benefits and limitations is presented. The preliminary outcome of this paper may provide a tool to aid organizations in selecting and prioritizing the most appropriate methods to be developed and implemented in planning and scheduling of their projects. It also initializes a theoretical base for more rapid taxonomy studies on the use of different planning and scheduling approaches. As an overall, the present paper reminds practitioners of common ground about its important insights on how such taxonomy studies have potential to make scope of those methods and tools clearer, especially when they compare among them within the same application contexts.

  • 14.
    Alzghoul, Ahmad
    et al.
    Halmstad University.
    Hyseni, Burim
    Halmstad University.
    Övergång till högre stålhållfastheter - konsekvensanalys2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 15.
    Andersen, Linn
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Widell, Hanna
    Halmstad University, School of Business, Engineering and Science.
    En villaleverantörs möjlighet till etablering i Finland: analys av för- och nackdelar2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The construction market has, as a result of the crisis in Europe been uncertain in recent years. During the year 2013, the construction will be stabilized, in particular Finland. The geographical proximity between Sweden and Finland and similarities in cultures and climates makes Finland a coveted market for many Swedish companies.

    Differences in national regulations and guidelines, which are produced by the authorities in different countries, are examples of barriers that may hamper the process, including for Swedish villa suppliers, to establish themselves on the Finnish market. It may be useful when facing a new export drive, to look up what similarities and differences there are between the countries building codes, to prevent mistakes and unnecessary costs to the project work.

  • 16. Andersson, Björn
    et al.
    Andersson, Isabell
    Vid val av formställning: Ur ett företagsperspektiv2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 17.
    Andersson, Marcus
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Erro, Ossian
    Halmstad University, School of Business, Engineering and Science.
    BIM-modeller som bygghandling: Spårning av problem med BIM-modeller som bygghandling gentemot traditionella ritningar2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 18. Andersson, Martin
    et al.
    Vikard, Peter
    Säkrare byggarbetsplatser: En rapport om arbetsmiljö i allmänhet och fallolyckor i synnerhet2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In Sweden there are 299 000 working in the construction industry. The construction industry is one of the industries where most accidents occur every year. During the last ten years there have been 111 death accidents in the construction industry and 48 of them were falling accidents. That means, in average, one death accident every month.

    Falling accidents gives serious injuries to the persons who are affected by them. It is anticipated that this report will investigate the factors beyond the falling accidents and also to present proposals that can decrease the number of falling accidents in the future.

    To secure a healthy and safe construction site it is of great importance that both the employers and the employees cooperate towards the same goal. A good work environment will benefit both the employer, the project will be finished in time with a good profit margin, and the employees will be satisfied to everyday come to a secure construction site.

    The result of this report indicate that it’s very important to plan the work before executing it ,so that everyone involved knows what they are going to do. This, together with, better management from the company’s directors to the employees will reduce the risk for accidents to occur.

  • 19. Andersson, Mimmi
    et al.
    Andersson, Louise
    Ansvarsfrågan vid fuktspärrsarbete i våtutrymme2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This final project is an investigation about the responsibility in rooms where the walls and floors are exposed or partly exposed to irrigation of water, as a bathroom, laundry room and WC.

     

    The cost for all water damage is valued for 5 000 000 000 SEK each year. How is this possible with all information about the problem and good materials? Who is responsible?

     

    Incites had been made in the subject throw reading reports and participation in courses about how to make a room mention above. Discussions have been made with workers in the trade of making the walls waterproof.

    The conclusion in the rapport is about who´s responsible for the damages and will pay the cost of the renovation. The responsibility is discussed between the contractor and the insurance company. If the room is waterproof system is made by the rules the insurance company pays. If it’s not the contractor is paying or if they don’t know how the carpenter is the owner has to pay for the new bathroom.

  • 20.
    Andersson, Niclas
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL), Sustainability, Innovation and Management in Building (SIMB).
    BIM Adoption in University Teaching Programs: The Swedish Case2013In: Proceedings of CITA BIM Gathering Conference 14-15 November 2013 / [ed] Dr. Allan Hore, Barry McAuley, Dr. Roger West, Dublin: The Construction IT Alliance , 2013, p. 163-168Conference paper (Refereed)
    Abstract [en]

    Implementation of BIM in the construction industry relies on sufficient knowledge and skills about BIM in order to gain momentum and success. Thorough understanding of the possibilities as well as challenges related to the application of BIM constitutes essential drivers for the adoption of BIM among all the industry actors throughout the construction process. Thus, there is a need for supply of knowledge and skills about BIM and its implications on the organisation, communication, management, business models etc. in construction. Accordingly, universities play an important role as a knowledge and skills supplier that helps to provide the necessary conditions for the implementation of BIM in the construction industry. This study investigates how the curricula of engineering and architectural teaching programs at Swedish universities and university colleges have responded to the apparent and increasing demand for BIM competences in industry. The study relies on a survey of 10 universities and 8 university colleges that provide engineering and architectural teaching programs at a master’s and/or a bachelor’s level. The findings show that bachelor’s engineering programs at university colleges generally have adopted BIM into the curricula to a somewhat larger extent compared to engineering programs at a master’s level. The BIM-adoption in architectural programs is, however, significantly limited. Further, the degree of BIM-adoption differs significantly between the respective teaching programs. Only few universities have adopted BIM as an integrated subject in courses that deal with general construction related issues. The predominant approach is to implement BIM-subjects as discrete teaching modules, i.e. stand-alone courses, rather than as a cross disciplinary aspect implemented in a number of the existing courses. Besides, a considerate mismatch is identified between the technical characteristics of the BIM curricula at universities and the process-oriented approach to BIM represented by the industry. Thus, the universities would benefit from a closer collaboration with the industry in BIM-related matters and they need to take on a strategic approach to BIM at an overall university or program level in order to avoid isolated BIM initiatives at a single course level.

  • 21.
    Andersson, Niclas
    et al.
    Lund University, Lund, Sweden.
    Widén, Kristian
    Lund University, Lund, Sweden.
    Construction Innovation Systems - A Sector Approach2005In: Understanding the Construction Business and Companies in the New Millennium / [ed] Kalle Kähkönen & Martin Sexton, Helsinki: VTT – Technical Research Centre of Finland & RIL – Association of Finnish Civil Engineers , 2005, p. 203-213Conference paper (Refereed)
    Abstract [en]

    Recent studies depict the general need to increase and improve innovation in the construction industry. Innovation processes are traditionally described and analysed either on a macro level or a micro level. Production in construction is basically project oriented, as opposed to manufacturing industries for which most of these theories are developed. It is not fully sufficient to study innovation from a micro or a macro level due to the effects of the project orientation and the large number of actors in the construction industry. The objective of this paper is to present a model of the construction innovation systems from a sector systems approach. The study rests upon findings in the area of innovation systems in general and construction innovation systems in particular on one hand and construction sector systems analysis on the other. This paper presents arguments for the development of activity based innovation systems at a construction sector level.

  • 22.
    Andersson, Paul
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Ladan, Igor
    Halmstad University, School of Business and Engineering (SET).
    Transport av volymelement: Förutsättningar ur ett företags perspektiv2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Building with volume element is relatively new and has started to increase more and more. The regulations that exist to regulate and determine how the transports of volume elements are to be conducted are diffuse and not very well adjusted to address the issues with transporting volume elements. Today there are a number of instances that a company has to turn to in order to get a somewhat different view, what regulations say and interpret it in order to know what applies and not applies regarding the transportation of volume elements. regulations. The rules that are in place make it tough for the volume element producing companies to develop and continue to be active on the market. New stricter laws regarding environment safe building leads to the volume elements getting larger which makes it even harder to transport them from a law and rules point of view.

  • 23.
    Andersson, Sebastian
    et al.
    Halmstad University.
    Burnelius, Jesper
    Halmstad University.
    Miljöbetong2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 24.
    Anheim, Fredrik
    et al.
    Luleå University of Technology, Luleå, Sweden.
    Widén, Kristian
    Lund University, Lund, Sweden.
    Learning organizations in the Swedish construction area2001In: Construction Economics and Organization: Proceedings of the 2nd Nordic Conference on Construction Economics and Organization: 24–25 April 2001, Gothenburg, Sweden / [ed] Jan Bröchner, Per-Erik Josephson & Bengt Larsson, Göteborg: Dept. of Building Economics and Management, Dept. of Service Management, Chalmers Univ. of Technology , 2001, p. 259-266Conference paper (Refereed)
  • 25.
    Aramrattana, Maytheewat
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Centre for Research on Embedded Systems (CERES). The Swedish National Road and Transport Research Institute (VTI), Göteborg, Sweden.
    A Simulation-Based Safety Analysis of CACC-Enabled Highway Platooning2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Cooperative Intelligent Transport Systems (C-ITS) enable actors in the transport systems to interact and collaborate by exchanging information via wireless communication networks. There are several challenges to overcome before they can be implemented and deployed on public roads. Among the most important challenges are testing and evaluation in order to ensure the safety of C-ITS applications.

    This thesis focuses on testing and evaluation of C-ITS applications with regard to their safety using simulation. The main focus is on one C-ITS application, namely platooning, that is enabled by the Cooperative Adaptive Cruise Control (CACC) function. Therefore, this thesis considers two main topics: i) what should be modelled and simulated for testing and evaluation of C-ITS applications? and ii) how should CACC functions be evaluated in order to ensure safety?

    When C-ITS applications are deployed, we can expect traffic situations which consist of vehicles with different capabilities, in terms of automation and connectivity. We propose that involving human drivers in testing and evaluation is important in such mixed traffic situations. Considering important aspects of C-ITS including human drivers, we propose a simulation framework, which combines driving-, network-, and traffic simulators. The simulation framework has been validated by demonstrating several use cases in the scope of platooning. In particular, it is used to demonstrate and analyse the safety of platooning applications in cut-in situations, where a vehicle driven by a human driver cuts in between vehicles in platoon. To assess the situations, time-to-collision (TTC) and its extensions are used as safety indicators in the analyses.

    The simulation framework permits future C-ITS research in other fields such as human factors by involving human drivers in a C-ITS context. Results from the safety analyses show that cut-in situations are not always hazardous, and two factors that are the most highly correlated to the collisions are relative speed and distance between vehicles at the moment of cutting in. Moreover, we suggest that to solely rely on CACC functions is not sufficient to handle cut-in situations. Therefore, guidelines and standards are required to address these situations properly.

  • 26.
    Aramrattana, Maytheewat
    et al.
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Centre for Research on Embedded Systems (CERES). The Swedish National Road and Transport Research Institute (VTI), Göteborg, Sweden.
    Englund, Cristofer
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR - Center for Applied Intelligent Systems Research. RISE Viktoria, Göteborg, Sweden.
    Larsson, Tony
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Centre for Research on Embedded Systems (CERES).
    Jansson, Jonas
    The Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden.
    Nåbo, Arne
    The Swedish National Road and Transport Research Institute (VTI), Göteborg, Sweden.
    Safety Evaluation of Highway Platooning Under a Cut-In Situation Using Simulation2018In: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016Article in journal (Refereed)
    Abstract [en]

    Platooning refers to an application, where a group of connected and automated vehicles follow a lead vehicle autonomously, with short inter-vehicular distances. At merging points on highways such as on-ramp, platoons could encounter manually driven vehicles, which are merging on to the highways. In some situations, the manually driven vehicles could end up between the platooning vehicles. Such situations are expected and known as “cut-in” situations. This paper presents a simulation study of a cut-in situation, where a platoon of five vehicles encounter a manually driven vehicle at a merging point of a highway. The manually driven vehicle is driven by 37 test persons using a driving simulator. For the platooning vehicles, two longitudinal controllers with four gap settings between the platooning vehicles, i.e. 15 meters, 22.5 meters, 30 meters, and 42.5 meters, are evaluated. Results summarizing cut-in behaviours and how the participants perceived the situation are presented. Furthermore, the situation is assessed using safety indicators based on time-to-collision.

  • 27.
    Aramrattana, Maytheewat
    et al.
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Centre for Research on Embedded Systems (CERES). The Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden.
    Larsson, Tony
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Centre for Research on Embedded Systems (CERES).
    Englund, Cristofer
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR - Center for Applied Intelligent Systems Research. RISE Viktoria, Gothenburg, Sweden.
    Jansson, Jonas
    The Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden.
    Nåbo, Arne
    The Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden.
    Simulation of Cut-In by Manually Driven Vehicles in Platooning Scenarios2017In: 2017 IEEE 20th International Conference on Intelligent Transportation Systems (ITSC), Piscataway, NJ: IEEE, 2017, p. 1-6Conference paper (Refereed)
    Abstract [en]

    In the near future, Cooperative Intelligent Transport System (C-ITS) applications are expected to be deployed. To support this, simulation is often used to design and evaluate the applications during the early development phases. Simulations of C-ITS scenarios often assume a fleet of homogeneous vehicles within the transportation system. In contrast, once C-ITS is deployed, the traffic scenarios will consist of a mixture of connected and non-connected vehicles, which, in addition, can be driven manually or automatically. Such mixed cases are rarely analysed, especially those where manually driven vehicles are involved. Therefore, this paper presents a C-ITS simulation framework, which incorporates a manually driven car through a driving simulator interacting with a traffic simulator, and a communication simulator, which together enable modelling and analysis of C-ITS applications and scenarios. Furthermore, example usages in the scenarios, where a manually driven vehicle cut-in to a platoon of Cooperative Adaptive Cruise Control (CACC) equipped vehicles are presented. © 2017 IEEE.

  • 28.
    Arvidsson, Patrik
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Khalaf, Mohamad
    Halmstad University, School of Business and Engineering (SET).
    Miljöval för byggnadsmaterial: Med häktet i Helsingborg som referensobjekt2012Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 29.
    Augustsson, Emil
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Jamel, Hussein
    Halmstad University, School of Business, Engineering and Science.
    Fukt i samverkanskonstruktioner: Bjälklag i KL-trä och betong2019Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Timber-concrete composites is more and more frequently used in timber structures, as the structures grow taller and taller. This is due to its ability to increase the span of the slabs, improve the acoustic characteristics and improve the capacity of side loads, such as wind loads. The issue when executing this kind of composites is the different materials and how they react differently to moisture. Despite this, there is not much research on the subject. The purpose of this report is therefore to investigate what moisture contents to expect, both on short- and long-term, when different kind of executions of the timber-concrete slab is applied and what impact these values could lead to. The aim has been to contribute to a better understanding of what impact moisture in timber-concrete composites have, and how to handle this. To find out the moisture content, both laboratory tests and simulations has been carried out. From these tests we have been able to make calculations and assumptions in order to give suggestions on moisture barriers between the materials.

  • 30. Axell, Jonathan
    et al.
    Nilsson, Oscar
    Hantering av ändrings- och tilläggsarbeten inom byggindustrin: En komparativ studie för en ökad produktivitet inom byggbranschen2018Independent thesis Basic level (university diploma), 180 HE creditsStudent thesis
    Abstract [en]

    With the housing shortage in Sweden today, effective solutions to the problems that arise are required. One of the issues in almost every construction project is change orders which often causes additional work and could negative impacts on the project such as reduced productivity; it could cause rework which could affect the working environment and increase the project cost. This report will review an alternative method of managing change work called “TvåTågsPrincipen” (TTP). What characterizes the method is that you produce in two teams, a production team that strives for continuous production, and a second team that comes in afterward as the production has passed from a moment or building component to carry out all changes and additions.  After several interviews with people within construction following conclusions were drawn: the method can bring both positive and negative effects to a project, and both are important to keep in mind. Examples of positive impacts could be accordingly: higher productivity, better working environment and lower costs. Incorrect use of the method could result in larger change orders, greater environmental impact and more material usage.

  • 31. Axelsson, Malin
    et al.
    Svanberg, Nina
    Critical Path & Line of Balance: Olika byggprojekt kräver olika planeringsmetoder2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The construction industry is currently known for projects often being delayed. Since planning is very important for the whole building project, it is very important that this is done correctly. More time should be put to plan the different projects so that the project should go on as smooth and efficient as possible. By using improved planning methods, you can contribute to a more efficient production on the construction site with less disturbances and corrections of errors.

    The purpose with this study is to compare the two planning methods, Critical Path and Line of Balance, and compare its strengths and weaknesses with each other. Hopefully, this study also contributes to development opportunities in planning in the construction sector. The result of the study has shown that Critical Path is a well-developed method that is best suited to non- repetitive projects such as construction of villas, schools and other unique projects. Line of Balance is better suited to projects with repetitive activities, for example construction of highways or the production of high-rise buildings. 

  • 32.
    Bergman, Rebecca
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Hermansson, Sanna
    Halmstad University, School of Business, Engineering and Science.
    Erfarenhetsåterföring av egenkontroller i byggproduktionen2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 33.
    Bergström, Gustav
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Åkeson, Axel
    Halmstad University, School of Business and Engineering (SET).
    Sveriges första flerbostadshus med plusenergiteknik: Köldbryggors inverkan på energianvändningen, en jämförelse mellan plusenergiteknik och konventionellt byggande2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 34.
    Bernander, Frida
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Lindhé, Kajsa
    Halmstad University, School of Business, Engineering and Science.
    Brandkrav, branddimensionering och brandskydd för trätakstolar: Ur ett konstruktörsperspektiv2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study contains a compilation and a clarification of the rules and requirements that can be applied to trusses and roof structures in consideration to fire. The different steps to decide the fire resistance of a truss or a roof construction is not that distinct and has to be combined with experience and subjective assessment. In case of fire the load combination for accidental load is used and in comparison with the ultimate limit state, the loads are reduced. Two different methods have been presented to determined the strength of construction timber, when exposed to fire. Both methods showed that construction timber, with a width of 45 mm, had a strength that correlate to a fire resistance of zero minutes. To improve the fire resistance of a roof construction different methods to protect the element has been presented. The most efficient ways to protect the construction is with gypsum boards and rockwool but for lower requirements wood covering can also be used. Fire retardant treatment (FTR) and fire protecting paint are also presented but are not applicable on wood trusses due to that FTR decreases the strength and fire protecting paint needs larger dimensions. In order to illustrate the different steps that are used when determining fire requirements of roof structures, two fictitious examples is presented. 

  • 35.
    Bertelsen, Niels Haldor
    et al.
    SBi, Aalborg University, Hørsholm, Denmark .
    Haugbølle, Kim
    SBi, Aalborg University, Hørsholm, Denmark .
    Hansson, Bengt
    Lund University, Lund, Sweden.
    Widén, Kristian
    Lund University, Lund, Sweden.
    Houvila, Pekka
    VTT, Esbo, Finland.
    Porkka, Janne
    VTT, Esbo, Finland.
    Karud, Ole Jørgen
    Selskapet for industriell og teknisk forskning ved Norges tekniske høgskole (SINTEF), Trondheim, Norway.
    CREDIT Summary and National Recommendations: Indicators and benchmarking framework for transparency in construction and real estate in the Nordic and Baltic countries: CREDIT Report 62010Report (Other academic)
    Abstract [en]

    This report summarises the work undertaken in the CREDIT project and proposals for how to implement the CREDIT framework. It is the final part of the Nordic/Baltic project CREDIT: Construction and Real Estate – Developing Indicators for Transparency. The report presents the objectives and the research model for CREDIT followed by a summary of the results of CREDIT Reports 2, 3, 4 and 5. The conclusive part of the report presents national recommendations of how to implement the CREDIT framework in the Nordic/Baltic countries Denmark, Finland, Norway, Sweden, Iceland, Estonia and Lithuania.

  • 36.
    Bertilsson, Viktor
    et al.
    Halmstad University.
    Odén, Daniel
    Halmstad University.
    Provning av expander- och betongskruv i håldäck2015Independent thesis Basic level (university diploma), 180 HE creditsStudent thesis
    Abstract [en]

    Title: Testing of mechanical expansion anchors and concrete screw anchors inhollow-core slabs

    For stabilization of prefabricated concrete elements during mounting obliquebraces are used. These oblique braces are occasionally attached into hollow-coreslabs. Abetong and Strängbetong are two companies using this method forstabilization and are in need of load values on what different fastenings canmanage attached into hollow-core slabs.Therefore this report is based on the testing of mechanical expansion anchors andconcrete screw anchors mounted in hollow-core slabs. The result of each fasteningis presented in tables with characteristic load values.After founding the concrete screw anchors most useful, an Excel-program wasdesigned where oblique loading can be presented.Keywords:

    Testing, mechanical expansion anchors, concrete screw anchors,hollow-core slabs, oblique loading, mechanical interlock, concrete fail, anchoragefail, concrete cone.

  • 37.
    Björkman, Amelie
    Halmstad University, School of Business and Engineering (SET).
    Hur uppnår vi god inomhusmiljö i förskolan idag?2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Abstract:

    This thesis work has been conducted at the Real Estate Department in Halmstad.

    The department consists of a construction/project management-unit and an operation/management-unit.

    Like many other towns in Sweden, Halmstad has had a long lasting problem with indoor environment. Not at least at their preschools.

    Today they are constructing from current building regulations. They have learned from negative experiences which have occurred in the indoor environment in older buildings.

    Focus is now on healthy materials, like low emission value, energy efficiency and optimization of the building, but still with soft parameters such as cleaning, interior and choice of materials.

    The fixtures is provides by the real estate department and the furnishings are provides by the children and youth administration. Together they are trying to provide a great indoor environment.

    I have, together with the real estate department and the children and youth administration of Halmstad, investigated how to provide a good indoor environment in the preschools with small funds.

    In my thesis there is one theoretical part with a questionnaire survey of how the preschool staff is experiencing their indoor environment to determine where the problems often start. And a practical part with measurements to try and come down to a result that analysis the cause of the problems and also to make sure that the ventilation systems are fulfilling projected values.

    The measurements and the questionnaire surveys was made at Lokes preschool in Frösakull, Askens preschool in Oskarström and Gullbrandstorps preschool.

    There were some differences between the staff-responses at the three different preschools.

    At Askens preschool they feel that the premises are cleaned poorly.

    At Gullbrandstorps preschool they feel that the indoor-air is bad because they can´t open the windows. The only common factor is the problems they have with the noise the children makes, which unfortunately is normal and specific for the activity.

    The particle measurement shows that Askens preschool is the one with the most particles in the indoor-air, which can be the results of poor cleaning och materials that are hard to clean.

    The airflow measurements didn´t show any unusual values, at those preschools where the measurements went well.

  • 38.
    Bodin, Hristina
    et al.
    Division of Natural Sciences, Kristianstad University, Kristianstad, Sweden.
    Ehde, Per Magnus
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Weisner, Stefan
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Attenuation of Pharmaceutical Substances: Phytoremediation using Constructed Wetlands2018In: 13th Society of Wetland Scientists (SWS) Europe Chapter Meeting: Management of Wetland Ecosystem Services: Issues, Challenges and Solutions, 2018, p. 19-22Conference paper (Refereed)
    Abstract [en]

    Introduction: Currently, wastewater treatment plants (WWTPs) do not efficiently remove pharmaceutical substances (PS). Thus, such substances are now frequently found in aquatic ecosystems worldwide. Also, concentrations of some PS in treated effluents exceed Environmental Quality Standards proposed by EU legislation. One resource-efficient option for increasing PS removal in WWTP effluents is to use constructed wetlands (CWs) as an attenuation step (Breitholtz et al. 2012; Li et al. 2014). However, very little research has been done on how to maximize the PS attenuation capacity of CWs. Therefore, a project with the aim to investigate reduction of different pharmaceutical substances in CWs with different vegetation compositions and water depths, was performed at the Experimental Wetland Area (EVA) located 20 km north of Halmstad, Sweden. 

  • 39.
    Bondeby, Alexander
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Johansson, Mikael
    Halmstad University, School of Business, Engineering and Science.
    Logistikhantering vid produktion i innerstadsmiljö: Inkluderar fallstudie av projektet kvarteret Hjärtat, Halmstad.2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 40.
    Borgström, Karin Margaretha
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL), Sustainability, Innovation and Management in Building (SIMB).
    Effects of energy saving actions in reconstruction: An evaluation of dwellings built in the period 1965-74 - proposal2003In: Construction economics and organization: Proceedings of the 3rd Nordic Conference on Construction Economics and Organization, 23-24 April 2003, Lund, Sweden / [ed] Bengt Hansson & Anne Landin, Lund: Division of Construction Management, Lund Institute of Technology, Lund University , 2003, p. 91-95Conference paper (Refereed)
  • 41.
    Borgström, Karin Margaretha
    Halmstad University, School of Business and Engineering (SET), Centre for Innovation, Entrepreneurship and Learning Research (CIEL), Sustainability, Innovation and Management in Building (SIMB).
    Effects of Energy Saving Measures at Renovation2008In: Proceedings of the 2008 World Sustainable Building Conference: world SB08 Convention Centre 21-25 September 2008 / [ed] Greg Foliente et al, Balnarring, Vic.: ASN Events Pty , 2008, p. 441-444Conference paper (Refereed)
    Abstract [en]

    This study focuses on the necessity of having knowledge about different energy saving measures when renovations and reconstructions are planned and designed. It is also of great importance to have routines to follow up what effects the actions taken have had on the energy consumption as well as on the indoor climate when the renovation is completed. A big part of the existing buildings in Sweden are built during a ten-year period between 1965 and 1974. When these buildings are to be renovated there is a great potential for energy saving.

  • 42.
    Borgström, Karin Margaretha
    Halmstad University, School of Business and Engineering (SET), Centre for Innovation, Entrepreneurship and Learning Research (CIEL), Sustainability, Innovation and Management in Building (SIMB).
    Energy efficiency in buildings after renovation2005In: Proceedings of the International Conference Sustainable Building 2005 SB05, Tokyo, 2005, p. 326-331Conference paper (Refereed)
  • 43.
    Borgström, Karin Margaretha
    Halmstad University, School of Business and Engineering (SET), Centre for Innovation, Entrepreneurship and Learning Research (CIEL), Sustainability, Innovation and Management in Building (SIMB).
    Energy Efficiency in Buildings with a Good Indoor Climate: An Evaluation of Actions Taken at Reconstruction2006In: Proceedings of Healthy buildings 2006: Vol. 1 : Indoor air quality (IAQ), building related diseases and human response, Lisboa: Lisboa Institute of Mechanical Engineering (IDMEC) , 2006Conference paper (Refereed)
  • 44.
    Brånfelt, Matilda
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Arvidsson, Max
    Halmstad University, School of Business, Engineering and Science.
    Utvecklings- och expansionsmöjligheter inom små byggföretag kompletterad2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 45.
    Böhm, Annette
    et al.
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Centre for Research on Embedded Systems (CERES).
    Lidström, Kristoffer
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Centre for Research on Embedded Systems (CERES).
    Jonsson, Magnus
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Centre for Research on Embedded Systems (CERES).
    Larsson, Tony
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Centre for Research on Embedded Systems (CERES).
    Evaluating CALM M5-based vehicle-to-vehicle communication in various road settings through field trials2010In: Proceedings - Conference on Local Computer Networks, LCN, (2010 12 01): 613-620, Piscataway, N.J.: IEEE Press, 2010, p. 613-620Conference paper (Refereed)
    Abstract [en]

    Future cooperative Intelligent Transport Systems (ITS) applications aimed to improve safety, efficiency and comfort on our roads put high demands on the underlying wireless communication system. To gain better understanding of the limitations of the 5.9 GHz frequency band and the set of communication protocols for medium range vehicle to vehicle (V2V) communication, a set of field trials with CALM M5 enabled prototypes has been conducted. This paper describes five different real vehicle traffic scenarios covering both urban and rural settings at varying vehicle speeds and under varying line-of-sight (LOS) conditions and discusses the connectivity (measured as Packet Reception Ratio) that could be achieved between the two test vehicles. Our measurements indicate a quite problematic LOS sensitivity that strongly influences the performance of V2V-based applications. We further discuss how the awareness of these context-based connectivity problems can be used to improve the design of possible future cooperative ITS safety applications.

  • 46.
    Callen, Ana Cruz
    Halmstad University, School of Business and Engineering (SET).
    housing development2011Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
  • 47.
    Carlson, Andreas
    et al.
    Halmstad University, School of Business, Engineering and Science. 1991.
    Wallentheim, Jesper
    Halmstad University, School of Business, Engineering and Science.
    Virtual Reality inom bygg- och fastighetsmarknaden2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Virtual Reality in the construction business is a relatively new topic. Companies and urban construction offices started evaluating this technique just a few years ago and now a part of them uses it on a daily basis. This paper investigates: The degree of implementation on the market today. We’ve tried to enlighten why not a bigger part of the market uses this innovative technique and why the use differs between cities in the country. By executing an inquiry distributed among the biggest cities in Sweden we map up the answers to these questions and backs and broadens the theories with interviews with experienced people on different levels of the construction industry. Results shows that the use is a lot more spread among the bigger cities in the country, but some results implies that smaller cities generally implements virtual reality on a deeper level. They also shows a generally positive view on virtual reality and our respondents sees lots of advantages and think that this will be a given feature in all construction projects of some complexity in the future.

  • 48.
    Carpatorea, Iulian
    et al.
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR - Center for Applied Intelligent Systems Research.
    Slawomir, Nowaczyk
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR - Center for Applied Intelligent Systems Research.
    Rögnvaldsson, Thorsteinn
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR - Center for Applied Intelligent Systems Research.
    Elmer, Marcus
    Volvo Group Trucks Technology, Göteborg, Sweden.
    Lodin, Johan
    Volvo Group Trucks Technology, Göteborg, Sweden.
    Learning of Aggregate Features for Comparing Drivers Based on Naturalistic Data2016In: Proceedings: 2016 15th IEEE International Conference on Machine Learning and Applications (ICMLA) / [ed] Lisa O’Conner, Los Alamitos, CA: IEEE Computer Society, 2016, p. 1067-1072Conference paper (Refereed)
    Abstract [en]

    Fuel used by heavy duty trucks is a major cost for logistics companies, and therefore improvements in this area are highly desired. Many of the factors that influence fuel consumption, such as the road type, vehicle configuration or external environment, are difficult to influence. One of the most under-explored ways to lower the costs is training and incentivizing drivers. However, today it is difficult to measure driver performance in a comprehensive way outside of controlled, experimental setting.

    This paper proposes a machine learning methodology for quantifying and qualifying driver performance, with respect to fuel consumption, that is suitable for naturalistic driving situations. The approach is a knowledge-based feature extraction technique, constructing a normalizing fuel consumption value denoted Fuel under Predefined Conditions (FPC), which captures the effect of factors that are relevant but are not measured directly.

    The FPC, together with information available from truck sensors, is then compared against the actual fuel used on a given road segment, quantifying the effects associated with driver behavior or other variables of interest. We show that raw fuel consumption is a biased measure of driver performance, being heavily influenced by other factors such as high load or adversary weather conditions, and that using FPC leads to more accurate results. In this paper we also show evaluation the proposed method using large-scale, real-world, naturalistic database of heavy-duty vehicle operation.

  • 49.
    Cederholm, Sebastian
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Hussein Nizarki, Bafrin
    Halmstad University, School of Business, Engineering and Science.
    Elnätets kapacitet för framtida belastningar från elbilar: En känslighetsanalys på ett av Halmstads lokalnät2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The Swedish government have a vision that up untill 2050 Sweden’s transport system is going to be free of fossil fuels and to achieve this vision, electricity is going to be the main fuel and will play a decisive role in the future transportional market. As a result of this, HEM Nät AB is now interested in knowing how their local electrical grid will be affected by a larger amount of electric vehicles, EVs, charged through households. Along the local grid’s high voltage line there are nine substations, which provide power to 815 customers. A sensitivity analysis was conducted on the local grid to appreciate the available capacity for the future load of EVs. The analysis was based on four different gridparameters, which possibly can affect the set conditions of an electrical grid when an EV is being charged: voltage drop, transformer load, harmonics and dissymmetry. Different chargepowers and wirings have also been compared to see what roles they will have in the future. After the simulations and hand calculations all of the gridparameters exceeded the set conditions. This happened at different percentages of the households, which were charging their vehicles. The voltage drop and transformer load for both of the powers, 3,7 kW and 11 kW exceeded the limitations when 40 % respectively 20 % of the studied are was being loaded. Two scientific methods were used to appreciate the added current harmonics, where the first one regarded a reduction of the summarized value of the current harmonics, where the second did not. The results showed, that either of the methods would indicate a problem on the grid. The simulation of the dissymmetry, the limitation was met after 7 % more load was done under one and the same of the phases. Finally, the study concluded that the local grid is relatively strong and can hold 332 EVs with 3,7 kW and 161 EVs with 11 kW.

  • 50.
    Chen, Le
    et al.
    Queensland University of Technology, Brisbane, Australia.
    Manley, Karen
    Queensland University of Technology, Brisbane, Australia.
    Lewis, Joanne
    Queensland University of Technology, Brisbane, Australia.
    Helfer, Fernanda
    School of Engineering, Griffith University, Nathan, Australia.
    Widén, Kristian
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL), Sustainability, Innovation and Management in Building (SIMB).
    Procurement and Governance Choices for Collaborative Infrastructure Projects2018In: Journal of construction engineering and management, ISSN 0733-9364, E-ISSN 1943-7862, Vol. 144, no 8, article id 04018071Article in journal (Refereed)
    Abstract [en]

    Collaborative approaches to infrastructure procurement are increasingly popular around the world due to their potential to provide improved project performance compared with more traditional approaches. The problem is that project outcomes continue to be unpredictable. Previous research has shown that this is the case regardless of whether the chosen procurement approach is based on price or non price selection of the project team. This is a major choice that clients make, but the presented research shows that governance choices for project execution are more important. This is significant because clients tend to focus more on procurement choices and typically do not differentiate governance based on those choices. This needs to change, and the authors show that optimal governance configurations vary on the basis of the chosen type of team configuration. For example, three specific governance arrangements for workshops are highlighted for single teams, and two specific governance arrangements for risk/reward sharing are highlighted for multiple teams. This study identifies governance actions that are associated with superior time and cost outcomes on collaborative infrastructure projects in Australia run by experienced public-sector clients under the two procurement scenarios. Based on a survey of 320 senior managers, independent sample t-tests were conducted to compare the application of governance actions among three distinct groups of projects, based on type of team selection and type of project outcome. The study provides evidence of the most effective approaches to project governance in a country that is a world leader. The results provide much needed recommendations for improved project performance based on large-scale quantitative analysis, which before now has not existed. Overall, the study recommends more attention be paid to noncontractual governance under both approaches to team selection, although the specific actions recommended vary. © 2018 American Society of Civil Engineers.

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