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  • 1.
    Abbas, Taimoor
    et al.
    Lund Univ, Elect & Informat Technol Dept, S-22100 Lund, Sweden..
    Sjöberg, Katrin
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Centre for Research on Embedded Systems (CERES).
    Kåredal, Johan
    Lund Univ, Elect & Informat Technol Dept, S-22100 Lund, Sweden..
    Tufvesson, Fredrik
    Lund Univ, Elect & Informat Technol Dept, S-22100 Lund, Sweden..
    A Measurement Based Shadow Fading Model for Vehicle-to-Vehicle Network Simulations2015In: International Journal of Antennas and Propagation, ISSN 1687-5869, E-ISSN 1687-5877, article id 190607Article in journal (Refereed)
    Abstract [en]

    The vehicle-to-vehicle (V2V) propagation channel has significant implications on the design and performance of novel communication protocols for vehicular ad hoc networks (VANETs). Extensive research efforts have been made to develop V2V channel models to be implemented in advanced VANET system simulators for performance evaluation. The impact of shadowing caused by other vehicles has, however, largely been neglected in most of the models, as well as in the system simulations. In this paper we present a shadow fading model targeting system simulations based on real measurements performed in urban and highway scenarios. The measurement data is separated into three categories, line-of-sight (LOS), obstructed line-of-sight (OLOS) by vehicles, and non-line-of-sight due to buildings, with the help of video information recorded during the measurements. It is observed that vehicles obstructing the LOS induce an additional average attenuation of about 10 dB in the received signal power. An approach to incorporate the LOS/OLOS model into existing VANET simulators is also provided. Finally, system level VANET simulation results are presented, showing the difference between the LOS/OLOS model and a channel model based on Nakagami-m fading.

  • 2.
    Abd-Aljawad, Baraa
    et al.
    Halmstad University, School of Health and Welfare.
    Grönberg, Camilla
    Halmstad University, School of Health and Welfare.
    Vem tar hand om chefen?: En explorativ studie om första linjens- och mellanchefers upplevda organisatoriska och sociala arbetsmiljö.2022Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    “Who takes care of the manager?”An exploratory study of manager´s perceived organizational and social work environment. 

    The study aims to create a deeper understanding of managers' experiences, of their organizational and social work environment. Furthermore, the study aims to examine managers' perceptions of health factors that they perceive as health-promoting. The main question of this study is; “How do managers experience their organizational and social work environment?”. As previous research has often focused on preventive factors, this study focuses on a health-promoting perspective. Which refers to the study's second question; "What health factors do managers perceive as health-promoting?". The study applies a qualitative method through semi-structured interviews for the collection of empirical material. The sample consists of eight first-line and middle managers in various industries. The study has an exploratory focus in order to create a basis for further research. 

    The results of the study show that recovery, communication, colleagues, social relationships, clear roles, goals and tasks are perceived as important organizational and social aspects in the manager's own work environment. The results also show that perceived health factors are flexibility in working hours, being heard, support from colleagues, functioning social relationships and recovery by adapting their meetings.  

    Keywords: Organizational and social work environment, management, health factors, health promotion.

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  • 3.
    Abdeljaber, O.
    et al.
    Qatar University, Doha, Qatar.
    Younis, Adel
    Qatar University, Doha, Qatar.
    Avci, O.
    Qatar University, Doha, Qatar.
    Catbas, N.
    University of Central Florida, FL, United States.
    Gul, M.
    University of Central Florida, FL, United States.
    Celik, O.
    University of Central Florida, FL, United States.
    Zhang, H.
    University of Alberta, Edmonton, AB, Canada.
    Dynamic Testing of a Laboratory Stadium Structure2016In: Proceedings of the Joint Geotechnical and Structural Engineering Congress 2016, 2016, p. 1719-1728Conference paper (Refereed)
    Abstract [en]

    Studies with large physical models are a vital link between the theoretical work and field applications provided that these models are designed to represent real structures where various types and levels of uncertainties can be incorporated. While comprehensive analytical and laboratory joint studies are ongoing at Qatar University, University of Central Florida and University of Alberta, this paper presents the initial findings of dynamic testing at Qatar University. A laboratory stadium structure (grandstand simulator) has been constructed at Qatar University. Capable of housing thirty spectators, Qatar University grandstand simulator is arguably the largest laboratory stadium in the world. The structure is designed in a way that several different structural configurations can be tested in laboratory conditions to enable researchers to test newly developed damage detection algorithms. The study presented in this paper covers the finite element modeling and modal testing of the test structure. © ASCE.

  • 4.
    Abdou Mahmoud, Amir
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Dahlqvist, Ted
    Halmstad University, School of Business and Engineering (SET).
    Ånghuvud för steamer2010Independent thesis Advanced level (degree of Master (Two Years)), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [en]

    The following report is for CAD-technicians 2nd year.

     

    The task that the report is built on is done in collaboration with Hafa AB. The task is to develop a new steam nozzle for steamers, a sort of combination of steam sauna and a shower. The reasoning behind the development is to make the steam nozzle match with Hafa’s current design and to gain as little wasted water as possible.

     

    There came forth a mutual idea to integrate the steam nozzle into the shower column, during a meeting with Hafa, which we developed further and became the first prototype.

     

    The prototype showed to be a success, even though protection for the steam had to be made since it flowed into the steamer at a rate which was not acceptable, mainly because little water was wasted and because the prototype was just a third of the original steam nozzle’s size.

     

    The method that we used was the same that was used by us during earlier courses in the CAD-technicians programme.

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  • 5.
    Abebe, Abay Damte
    et al.
    Halmstad University, School of Business, Engineering and Science.
    He, Qikang
    Halmstad University, School of Business, Engineering and Science.
    Foam Behavior Analysis Based On A Force Measurement System2018Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Abstract

    In the world where every sector of industrial manufacturing is being converted toautomated systems, surface finishing processes like sanding and polishing seem to lag.This phenomenon is not surprising as these processes are complex to optimize. Therehave been projects going on with the support of European Commission to findsolutions under SYMPLEXITY (Symbiotic Human-Robot Solutions for ComplexSurface Finishing Operations). One of the projects in under this include poliMATIC(Automated Polishing for the European Tooling Industry). Halmstad University isinvolved in doing projects.

    This project took a portion of this study in aim to understand a foam material’s behavior used for sanding tool at the tip of a robotic arm. This is studied using a forcemeasurement system developed at Halmstad University. The project has two sectionsand starts with one; Understanding the force measurement system and upgrading innecessary ways. Two; studying how the foam material compressive hardness propertyis affected when the material is fit with sandpaper for sanding operation using theforce measurement system. The study finally revealed how the combination of thefoam with sandpaper affects the robustness of the material, and significantlyimproved the output of the system with by reducing the noise level with 40%.

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  • 6.
    Achampong, Davis
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Eriksson, John
    Halmstad University, School of Business, Engineering and Science.
    Purus Velox: En mekanisk städmaskin2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    One of the park and street workers many tools, is the traditional broom. The

    broom is used to tidy up surfaces where machines can’t reach, such as; underneath

    benches, in corners and smaller areas. Using a traditional broom requires a twisted

    and forward leaning body posture that, if performed during an extended time

    period, can result in musculoskeletal problems and negative impact on the health.

    This project aimed to develop a new cleaning tool to reduce the forward-leaning,

    twisted body posture.

    This thesis used a product development methodology and a biomechanical

    analysis to fulfil, and evidence base the aim. Review of the literature,

    biomechanical analysis and benchmarking were used to set requirement

    specifications for this project. The project applied David G Ullman's iterative

    product development methodology, including brainstorming, quality function

    deployment, morphology, Pugh´s matrix and a failure mode effects analysis.

    Furthermore, a functional prototype was built as a last step of the development

    phase.

    Evaluation of the prototype, in comparison to the traditional broom, was

    performed using 3D movement analysis (Qualisys motion capture system) and

    surface electromyography (Mega 8 channel system) on one test person.

    The project resulted in a physically functional prototype that can be used for

    similar tasks as a traditional broom. The concept design dictates the user to push

    the cleaning tool in front of the body with postural symmetry in all three planes.

    The comparison between a traditional broom and the prototype showed a

    reduction in muscle activity when using the prototype. Furthermore, the

    movement analysis showed a working posture with less forward leaning and back

    rotation. Furthermore, the participant could keep neutral angles in the shoulders

    and wrists throughout the task. Note that, the biomechanical analyzes was only

    made on one test person which is not enough to conclude that the prototype

    contributes to a more healthy working posture.

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  • 7.
    Adolfsson, Matilda
    Halmstad University, School of Business, Engineering and Science.
    Vibrationer och engesvängningar i Alfdex separator2019Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this thesis is to create a greater understanding of what happens inAlfdex’s separator in terms of natural frequencies, also called resonances. Try in asystematic way to find out where the problem is and produce a possible solutionto the problem. To achieve this smoothly, vibration measurements were made onthree different models with two variants, a total of six different variants. Themeasurements made with an electric shaker were set to run a sweep of 2-500Hz,which means that it increases the frequency from 20-500Hz with a constantacceleration of 2G. The measurement was first made on these six variants and, onthe basis of the results, it has been possible to compare with the modificationsmade.As the first modification, the disks in the separator were glued together to see ifthey made any difference from the previous result. As the next test spacers wereprinted out of the 3D-printer, that would replace the existing springs in theseparator, to aww what happens if we do not have any springs. There was also atest where the top of the separator the so-called house, was cut into a larger holeso as to see how the disks hold a constant amplitude relative to each other, whichmeans that the disks are not exposed to any natural frequencies. The springs werefilmed to see how they act and move, where it is clear that there are naturalfrequencies in the springs.Based on these tests, it can be concluded that the disk in question are not aproblem. The problem instead has its foundation in the springs that carry the diskstack throughout the separator, resonances in these give a great influence in theentire contents of the separator.

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  • 8.
    Agelis, Sacki
    et al.
    Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Jonsson, Magnus
    Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    System-Level Runtime Reconfigurablity - Optical Interconnection Networks for Switching Applications2004In: Proceedings of the International Conference on Engineering of Reconfigurable Systems and Algorithms, ERSA'04 / [ed] Toomas P Plaks & M Gokhale, Athens, USA: CSREA Press, 2004, p. 155-162Conference paper (Refereed)
    Abstract [en]

    The performance requirements on data and telecommunication switches and routers are continuously increasing and it is evident that new ideas and architectures must come to light to satisfy these new demands. In this paper, a runtime reconfigurable modular design approach is presented, using state-of-the-art microoptical-electrical mechanical system (MOEMS) components. The paper introduces a novel field of reconfigurability, where reconfiguration is made on the system level instead of, e.g. fine-granularity reconfigurable logic. Different reconfigurable system solutions with support to adapt for asymmetric traffic patterns are proposed and compared to see how design choices affect flexibility, performance etc. The proposed solutions are characterized by their multistage networks with reconfigurable shuffle patterns.

  • 9.
    Ahmad, Ammar
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Abbas, Rand
    Halmstad University, School of Business, Engineering and Science.
    Tillverkning av vingblad för små vindkraftverk enligt Piggotts kunstruktion2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis includes a mechanical engineering work that has been conducted in collaboration with TEROC AB, in the endeavour to manufacture blades for small wind turbines with 1.2 m rotor diameter primarily based on Piggott's construction. The method used in the project is based on Freddy Olsson's books; Principal & Primary construction, Piggott's design, Michael F. Ashby process and International Electrotechnical Commission.

    The group was commissioned by TEROC AB to review alternative manufacture with clear requirements specifications, various proposals were put forward. The first is that the blades are made of wood material, others of plastic composite and third proposal of aluminum.

    Proposals were the most suitable option for continuing with and developing further. The group performed simulation in Catia V5 and design of prototype sheets.

    The group performed strength calculations on the blade, with the collected facts the group could ensure the wind power blade's strength. The result has become a CAD model drawn in the Catia V5, the Cad model has also been used for a FEM analysis of strength theory, and selected material using the Michael F. Ashby process

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  • 10.
    Ahmed, Ahmed Omar
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Abdulrhman, Hithem
    Halmstad University, School of Business, Engineering and Science.
    Trappklättrare hjälpmedel till manuella rullstolar2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    In this thesis stair climbing tools were made for manual wheelchairs. The tool is intended to be used primarily on entrance stairs. It can also be used as an evacuation aid for apartments/workplaces that do not have evacuation sites. At the present time there are only electric commercials aids which are expensive to own. The main problem of the work was to find a stair climbing mechanism. The design must be above all safe and cheap. The group used Fredy Olsson's method which consists of two phases namely principle and primary construction and other methods during work. A force analysis has been performed to confirm that the assistant’s pulling force is reduced during the stair climbing with the aid. The mechanics of material was analyzed with the help of Simsolid and then checked by hand calculations. The project team has at the end achieved a product that fulfills the most requirements that were set from the beginning.

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  • 11.
    Akhtar, Naeem
    Halmstad University, School of Business, Engineering and Science.
    Analysis of Simris Hybrid Energy System Design and Working and Checking the Effects of Using High Capacity Factor Wind Turbine2019Independent thesis Advanced level (degree of Master (One Year)), 40 credits / 60 HE creditsStudent thesis
    Abstract [en]

    The world is entering the future where integration of renewable energy sources within the power grid will play an important role when facing the challenge of reducing global warming. The intermittent generation characteristics associate with renewable energy sources can be handled by the implementation of microgrids. A Microgrid is a group of energy source (e.g. wind, solar etc) that are located in the same local area that can operate independently in the event of electricity outage and can also be connected to the national grid in case of energy demand exceeds than the energy produced in the same local area. The implementation of microgrid in an electrical distribution system must be well planned to avoid problems. The EU has set high goals to reduce the non-renewable energy sources by 2030. EU has started some local energy systems (microgrids) and Simris is a part of it.

    This study is about a microgrid project at Simris in the south-east of Sweden. The village of Simris has 140 households supplied by a wind turbine of rated power 500kW and a solar power plant of 440 kW rated power. This project is run by E. ON within the framework and collaboration of Interflux, in which several network operators within the EU participate to investigate flexibility options in local energy systems. 

    The aim of this study is to find different scenarios in which the Simris microgrid can be run in islanded-mode. Four different scenarios were investigated, and simulation was done in MATLab. After simulation the results were discussed in the “Analysis and Results” section and the size of the wind turbine, the solar park (PV)and the battery were suggested for each of the scenarios. A short calculation was also included between the installation cost of the suggested wind turbine and the needed battery size. The cost of battery is much higher than the cost of wind turbine, so its beneficial for the economy of the microgrid to have a wind turbine of 1000 kW rated power and battery size 35 MWh rather than using the same old wind turbine of 469 kW rated power and upgrade the battery to 462 MWh. 

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  • 12.
    Al Shalabi, Ammar
    et al.
    Multimedia University, Melaka, Malaysia.
    Omar, Mohammed K.
    Multimedia University, Melaka, Malaysia.
    Rundquist, Jonas
    Halmstad University, School of Business and Engineering (SET), Centre for Innovation, Entrepreneurship and Learning Research (CIEL), Centre for Technology, Innovation and Marketing Management (CTIM2).
    Processes and strategies of NPD: A survey of Malaysian Industry2008In: International Journal of Manufacturing Science and Technology, ISSN 1524-1548, Vol. 10, no 1, p. 91-95Article in journal (Refereed)
    Abstract [en]

    In recent years, there has been a considerable interest in Malaysian manufacturing firms in New Product Development (NPD) which is considered to be indirectly a booster for the success of a firm. The purpose of the study is to highlight the NPD processes and methods used in Malaysian industry. This paper focuses only on the formal NPD-processes and NPD-strategies. From the available database, it is found that there are 250 confirmed companies from automotive, chemical, and electrical industries, which have R&D facilities; out of which 36% have agreed to participate in the survey, and 29% questionnaires have been used. The results show that the best firms have their R&D and NPD departments either overseas or partially in Malaysia.

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  • 13. Albazi, Waleed
    Smart Student Table2018Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The objective of this study is to develop what is called aStudent table, which is designed specifically for school children in emergency circumstances, so it will be suitable for partial solutions for the problems facing children in refugee camps, who are forced to leave their homes and schools. The idea of the study focuses on the creation of the Student table so that the generation of electricity will be suitable for lighting and illumination with the use of some electronic devices used in daily school needs like laptops, so the solar cell system will be connected to a small generator through a hybrid system. A fully functional prototype has been built as part of the study. When the system works through the hybrid route for lighting and illumination the solar system will generate the power needed and when the sun light disappears the Power can be generated by bike pedals. The generation of electricity by the hybrid system is considered as an effective and environmentally friendly option with economic benefits.

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  • 14.
    Aldegård, Alexander
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Gapinski, William
    Halmstad University, School of Business, Engineering and Science.
    Metodjämförelse för fixturkonstruktion till prototyptillverkning2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The thesis work is done in collaboration with Prodtex AB, which works to

    develop digital tools to facilitate the constructor´s work in virtual environments,

    for instance CAFD within CATIA V5. What the client wanted the project

    participants to perform was a comparison of the company's semi-automatic

    software for fixture design, and the traditional construction method with CATIA.

    The reason for the method comparison is because Prodtex AB requires data,

    which they can present to potential customers.

    The participants produced a method to enable the necessary components of the

    project, the method consisted of training in fixture design, fixture construction and

    work with the consulting company´s application. These elements have been

    essential for the comparison to be reliable. The main part of the assignment

    consisted of constructing units for the given fixture. The reason behind this is due

    to the necessity of a certain level of experience in fixture design, which is required

    to be able to assemble units with an accurate and efficient procedure.

    The method comparison generated data in terms of time in the measurement areas,

    input, design and export that the project participants analyzed and compiled in the

    result section. Based on the statistics, participants were able to find answers about

    which features the software made the most time savings of, and how abundant

    these were in relation to the traditional design method. A conclusion about when it

    was beneficial for a company to invest in the software was based on reasoning

    deduced from the outcome discussion.

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  • 15.
    Alexander, Mattsson
    Halmstad University, School of Business, Engineering and Science.
    Engine stability: A study of the events occurring prior to thecombustion in a small two-stroke engine2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis is a study conducted in collaboration with the engine performance group atHusqvarna AB. The study focuses on engine stability of smaller two stroke handheld enginesrunning on E10 (10% ethanol mixture in gasoline). The reason for the study is the new EUproposition that by 2020 all fuel must have 10 % renewable fuel content. To meet thisproposition Husqvarna has evaluated E10 and found that the engine stability of smaller twostroke engines are affected in a negative way by the fuel.The study focuses on events occurring prior to the combustion and mainly the carburetor. Theobjective for the thesis is to seek what contribution the events occurring prior to thecombustion have to the engine stability and find simple and implantable solution to improvethe stability with regards to the carburetor.The study has been conducted in three different work packages, system understanding to buildknowledge of how the carburetor operates, fault finding to seek potential attributes that canaffect the stability and fault mode analysis to seek why the attributes affect the stability.Furthermore, all the attributes found has been tested and validated on the engine to seek theircontribution to the stability.The conclusion made of the thesis is that with simple and implementable improvements of thecarburetor the engine stability could be increased with 40 %. A total of five differentattributes were found to affect the stability of the engine. Furthermore, a very detailedexplanation of how the carburetor operates and components inside the carburetor has beenestablished during the thesis.

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  • 16.
    Alfredsson, Emil
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Hessbo, Annie
    Halmstad University, School of Business, Engineering and Science.
    Utveckling av testrigg för nedfirningsdon: Test och verifiering2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Att följa Europeisk EN standard eller motsvarande är en förutsättning för att komma in på marknaden och ett bra sätt att som tillverkare certifiera sin produkts uppfyllande av säkerhetskrav. Syftet med detta examensarbete har varit utveckling av ett testsystem för funktionstest av bromskraften i ett nedfirningsdon i samarbete med företaget Cresto AB. Testriggen funktionalitetstestar bromskraften för ett nedfirningsdon med hänsyn till hastighetskrav från standarden SS-EN 341:2011. Projektgruppen har bestått av totalt fyra studenter som arbetat i grupper om två med olika prioriterade delar i produktframtagningsprocessen för att utveckla ett verifierat produktförslag. Detta projekt avser att verifiera testriggens hållfasthet, identifiera de kritiska riskerna vid användning, samt komponentval av lämpliga mätenheter för testsystemets hastighetsmätning och temperaturmätning. Litteraturen bekräftar komplexiteten av dagens produktionssystem och vikten av riskbedömningar på grund av detta, också konkurrenskraften det innebär för ett företag att investera i senaste tekniken, och att använda sig av de senaste metoderna för att verifiera sina produkter i produktutvecklingsfasen. Rapporten påvisar fynd från två uppsättningar av verktyg att använda vid verifiering och utveckling av maskiner. Också mätenheter valda utifrån senaste tekniken för produktionssystem.    

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  • 17.
    Ali Hassan, Ali
    Halmstad University, School of Business, Engineering and Science.
    Design & Analys av vindkraftverk nav utifrån Piggots konstruktion2019Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
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  • 18.
    Ali, Nashit
    et al.
    University Of Bologna, Bologna, Italy.
    Olofsson, Ulf
    KTH Royal Institute of Technology System and Component Design, Stockholm, Sweden.
    Dizdar, Senad
    Halmstad University, School of Business, Innovation and Sustainability.
    Friction, wear, and airborne particle emissions from rail-wheel contact with laser cladded overlays - A pin-disc tribometer simulation2023In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 518/519, article id 204635Article in journal (Refereed)
    Abstract [en]

    The present study uses a pin-on-disc tribometer to evaluate friction, wear, and airborne particle emissions for a rail-wheel contact. Test pins from UIC60 900A rail carbon steels were in contact with three types of test discs surfaces: R7 wheel carbon steel, laser cladding overlayed martensitic stainless steel, and laser cladding overlayed Ni-based-8% MnS self-lubricating alloy. Test results show about halving of the coefficient of friction, 0.42 to 0.22, and one ten-power lower specific pin and disc wear of discs with self-lubricating overlay compared to standard railway carbon steel contacts. Using stainless-steel overlayed discs also resulted in one ten-power lower specific disc wear, but pin wear is unchanged. Particle emission for the tests with discs with self-lubricating overlay is constant at almost 200 particles/cm3 while running in the distance is needed for the other tests. Almost all generated airborne wear particles were in the sub-100 nm range. The use of laser-cladded (LC) overlay reduced the number of airborne wear particles in the sub-100 nm range by more than a factor of 10. © 2023 Elsevier B.V.

  • 19. Ali Pour, Hossein
    et al.
    Kanojia, Abhineet
    Industry 4.0: Digitalization2022Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
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  • 20. Allahham, Hammam
    Study of the application of LeanManufacturing techniques in the food industry2018Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
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  • 21.
    Alsallout, Abdelrahman
    et al.
    Halmstad University, School of Business, Innovation and Sustainability.
    Kallungal Khalid, Khaja
    Halmstad University, School of Business, Innovation and Sustainability.
    Process Evaluation & Improvement2022Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

     This thesis was conducted to analyze and investigate improvement methods for the testing process of steam sterilizers at Getinge AB.Getinge is a leading MedTech multinational company based in Sweden. Steam sterilizer is one of their prominent products. A series of testing must be done before handing over the product to the customer, which mainly requires water and steam as consumable resources. The intention of this project is to find improvement methods or optimization techniques for the testing process and reduce the consumption of resources which would significantly impact the production lead time and cost. Upon the careful examination of the testing process it has been noticed that a significant amount of pure water with heat content has been wasted during the testing process, which could be recirculated/ reused, and the heat could be regenerated for useful purposes. The proposed optimization suggestions through this project are a thermally stratified tank which could handle cold and hot water as the testing process needs the supply of both. Majority of the faults during testing are identified in software implementation and a few in mechanical. A dummy testing is recommended to identify the faults in the implementation of the software without the need of consumable resources. A few methods to tackle mechanical faults are discussed further in this report. When implementing these optimization suggestions, it would drastically improve the testing process by reducing the consumption of resources like water, steam, natural gas, time, and labor. 

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  • 22.
    Altmann, Peter
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Kämpe, Oskar
    Halmstad University, School of Business and Engineering (SET).
    AN OPEN INNOVATION APPROACH TO THE RADICAL INNOVATION PROCESS: An Analysis of the Management of the Process of Radical Innovation in an Open Innovation Paradigm2010Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis amends some existing theoretical gaps and an overall lack of empirical studies regarding the ways R&D managers can use Open Innovation during the management of the radical innovation processes’ early development phase.Using existing theories, an interview guide and an analytical model was created. These were later used during the gathering and analysis of empirical data. Our sampling involves three of Sweden’s largest companies, representing three distinct industry fields. Interviews took place during April 2010, and all the interviewees were R&D managers with previous experience with Open Innovation and radical innovation.The results reveal that the managers do use Open Innovation when managing radical innovation, and point to both benefits and issues brought about by using Open Innovation during this process. The use of Open Innovation during the management of radical innovation can be divided into two main aspects; the actual extent to which it is used, and the ways the managers use it. Our results reveal that the extent varies from an early peak, an in between Open Innovation chasm and a final increase. Furthermore, our studies also show that the main ways the managers use OI are; exploitation and creation of revenue streams, knowledge leveraging and integration, and finally to create superior products using broad knowledge networks.

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    FULLTEXT01
  • 23.
    Altmann, Peter
    et al.
    Halmstad University, School of Business and Engineering (SET), Centre for Innovation, Entrepreneurship and Learning Research (CIEL), Centre for Technology, Innovation and Marketing Management (CTIM2).
    Rundquist, Jonas
    Halmstad University, School of Business and Engineering (SET), Centre for Innovation, Entrepreneurship and Learning Research (CIEL), Centre for Technology, Innovation and Marketing Management (CTIM2).
    Florén, Henrik
    Halmstad University, School of Business and Engineering (SET), Centre for Innovation, Entrepreneurship and Learning Research (CIEL), Centre for Technology, Innovation and Marketing Management (CTIM2).
    Sustained innovativeness and human resource management2011In: Research on Technology, Innovation and Marketing Management 2009-2011: Introducing the Research Area of Innovation Science / [ed] Sven-Åke Hörte, Halmstad: Högskolan i Halmstad , 2011, p. 21-35Chapter in book (Other academic)
    Abstract [en]

    Innovation is paramount to success. Over time firms must maintain their ability to innovate in order to maintain their competitive edge. In this paper we explore the role human resource management has in nurturing and enhancing the innovative capability of the firm. To explore HRM activities, functions and processes that enhance or impede innovativeness we conducted a literature review. Following this review, 10 propositions have been made that link HRM to both incremental and radical innovativeness respectively. Our results include suggestions for empirical studies to validate our propositions as well as some managerial implications.

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  • 24.
    Al-Zeyadi, Noora Talib Mohammed
    et al.
    Halmstad University, School of Business, Innovation and Sustainability.
    Jaber, Ghofrane
    Quality of 3D printed objects and the effect of 3D printing characteristics2022Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
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  • 25.
    Amanda, Hugosson
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Carolina, Martinsson
    Halmstad University, School of Business and Engineering (SET).
    Konstruktion och design av duschredskap2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    I denna rapport presenteras ett examensarbete som syftar till att ta fram idéer för en användarvänlig produkt, anpassad till dusch- och badrumsmiljöer som gör att äldre och funktionsnedsatta kan klara sig mer självständigt i hemmet. Arbetet har utförts tillsammans med uppdragsgivaren Jörgen Carlsson, produktchef på företaget Macro International AB (Macro) som tillverkar, utvecklar och säljer badrumslösningar med duschar och möbler. Examensarbetet har genomförts på Högskolan i Halmstad under våren 2014 och omfattar 15 högskolepoäng.

    Målet med projektet var att utifrån ett valt koncept utveckla en prototyp som passar till Macros nuvarande duschsortiment samt ta fram konstruktionsritningar för eventuell tillverkning av produkten. Produkten skulle vara lätt att montera för privatpersoner samt utstråla den känsla, enkelhet, personlighet och spänning som företaget strävar efter i alla sina produkter.

    Arbetet inleddes med en omfattande marknadsundersökning där tolkningen och resultatet av undersökningen tillsammans med uppdragsgivarens åsikter ledde till ett antal idéer att gå vidare med och utveckla. Två designmetodiker har kombinerats med en konstruktionsmetodik vilket har lett till ett slutligt resultat av ett duschredskap som kan användas som stöd i Macros duschar ”Skagen” och ”Fjord”. En prototyp av produkten tillverkades i Macros 3D-skrivare. Bildrenderingar och en monteringsfilm gjordes med hjälp av KeyShot 4, Catia V5 och Photoshop CS6. Även färdiga ritningar som kan användas vid en eventuell tillverkning är bifogade i rapporten.

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    Konstruktion och design av duschredskap
  • 26.
    Amir Bourak, Maher
    Halmstad University.
    An Integrated Method Of Lightweight Design, Optimization, and Bionics2020Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The main objective of the current study was to examine the trends and current status of lightweight design, optimization, and bionics in industrial applications. The goal wasto explore the suitable innovations used by industrial companies to ensure improved product performance and low costs of manufacturing. To achieve the goal, a secondary research methodology was employed in which seven studies on the topics of optimization, bionics, and lightweight designs were sampled and analyzed. A key resultnoted was that lightweight design is achieved through the use of magnesium alloys,aluminum alloys, and non-metallic materials such as carbon fiber-reinforced polymer.To optimize performance of the lightweight materials, computer technologies such as computer-assisted designs (CAD) are being used to ensure that the best shapes of the materials are utilized to offer the best performance. Meanwhile, bionics was employed by creating product designs which are inspired by nature such as meshless structures that minimize energy consumption, are cheaper, and are environmentally friendly.

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  • 27.
    Anderberg, Cecilia
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Cabanettes, Frederic
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Dimkovski, Zlate
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Ohlsson, Robert
    Rosen, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Combined SEM and Stylus Profiling Sensoring for Improved Cylinder Liner Honing2006In: Proceedings of Austrib 06 - International Tribology Conference, Brisbane: Queensland University of Technology , 2006, p. 6-Conference paper (Refereed)
    Abstract [en]

    The demands on decreased environmental impact from vehicles are resulting in a strong push for decreased engine oil and fuel consumption.

    Recent engine tests have shown a promising reduction in oil consumption when using cylinder liners with a smoother finish than the current plateau honing.

    One approach to produce smoother liner surfaces is to replace SiC ceramic honing stones with diamond tools. However, even though the diamond honing process results in higher productivity, improved quality control is needed to monitor the degree of cold worked material - “blechmantel” (German), and the resulting risk of increased wear and scuffing.

    A number of petrol and diesel engine cylinder liners have been mapped to be able to verify the quality and consequences, in terms of wear and function, of the honing process. A new mapping method, combining SEM images and quantitative image analysis with traditional 2D profilometry has been developed and tested in this study. The surface mapping method developed was employed before and after the test to study effect of running-in wear on the surface, features characterized with the SEM- and the 2D profilometer.

    The results show that combining SEM- and profilometric methods gives a good picture of the effects of varying the cylinder liner pressure and roughness. The core roughness decreases more for diesel liners than for petrol liners.. A probable cause is that the more severe diesel high pressure run-in conditions are able to effectively “truncate” the plateaux and remove residing plastically deformed un-cut honing residues while the less severe petrol liner conditions do not manage to remove the blechmantel and irregularities to an important extent.

  • 28.
    Anderberg, Cecilia
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Cabanettes, Frederic
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Dimkovski, Zlate
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Ohlsson, Robert
    Volvo Power Train Corp., Volvo Group, Göteborg, Sweden.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Cylinder Liners and Consequences of Improved Honing2006Conference paper (Refereed)
    Abstract [en]

    The demands on decreased environmental impact from vehicles are resulting in a strong push for decreased engine oil and fuel consumption. Engine oil and fuel consumption are to a great extent controlled by the topography of the cylinder liner surface.

    Recent engine tests have shown a promising reduction in oil consumption when using cylinder liners with a smoother finish than the current plateau honing.

    One approach to produce smoother liner surfaces is to replace SiC ceramic honing stones with diamond tools. However, event though the diamond honing process results in higher productivity, improved demands of quality control is needed to monitor the degree of cold worked material - “blechmantel” (German), and the resulting risk of increased wear and scuffing.

    A number of petrol and diesel engine cylinder liners have been mapped to be able to verify the quality and consequences, in terms of wear and function, of the honing process. A new mapping method, combining SEM images and quantitative image analysis with traditional 2D profilometry has been developed and tested in this study. The liners where tested in a reciprocating rig of 8 mm stroke and with a frequency of 10 Hz, simulating the top-dead center conditions in a running engine.

    The tests where carried out in high- and low pressure conditions with smooth respectively rough liner roughnesses against PVD coated piston rings. The developed surface mapping method was employed before and after the test to study effect of running-in wear on the surface, features characterized with the SEM- and the 2D profilometer.

    The results show that combining SEM- and profilometric methods gives a good picture of the effects of varying the cylinder liner pressure and roughness. The core roughness decrease more for diesel liners than for petrol liners. In average (rough and smooth liners) the diesel core roughness decrease 265% while the petrol liners average on a 60% decrease. Blechmantel- and Irregularities ratio show a high sensitivity to varying conditions and decrease 1180% to 100% for the diesel liners while the parameters increase between 106% to 18% for all the petrol liners. A probable cause is the more severe diesel high pressure run-in conditions are able to effectively “truncate” the plateaux and remove residing plastically deformed un-cut honing residues while the less severe petrol liner conditions not manage to remove the blechmantel and irregularities in an important extent.

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  • 29.
    Anderberg, Cecilia
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Cabanettes, Frederic
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Dimkovski, Zlate
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Liner Surface Improvements for Low Friction Piston Ring Packs2009In: Society of Tribologists and Lubrication Engineers annual meeting & exhibition 2009: Lake Buena Vista, Florida, USA, 17 - 21 May 2009, Red Hook, NY: Curran Associates, Inc., 2009, p. 455-459Conference paper (Refereed)
  • 30.
    Anderberg, Cecilia
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK). Getinge Sterilization AG, Getinge, Sweden.
    Dimkovski, Zlate
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt - Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Liner surface improvements for low friction piston ring packs2014In: Surface Topography : Metrology and Properties, ISSN 2051-672X, Vol. 2, no 1, article id 014009Article in journal (Refereed)
    Abstract [en]

    The development of engine components in the automotive industry is governed by several constraints such as environmental legislation and customer expectations. About a half of the frictional losses in an internal combustion engine come from the interactions between the piston assembly and cylinder liner surface. The tribological considerations in the contact between the piston ring and cylinder liner have attracted much attention over the past few decades. Many non-conventional cylinder liner finishes have been, and are being, developed with the aim to reduce friction losses and oil consumption, but the effects of the surface finish on piston ring pack performance is not well understood. One way of reducing friction in the cylinder system is to reduce the tangential load from the piston ring pack, focusing on the oil control ring. However, the side-effect of this is a disappointingly increased oil consumption. In this study a number of different cylinder liner surface specifications were developed and implemented in test engines with the aim of maintaining the level for oil consumption when decreasing the tangential load for the piston ring pack. To improve our understanding of the result, the same surfaces were evaluated in elastic and elasto-plastic rough contact and hydrodynamic flow simulation models. It is shown that oil consumption is strongly related to surface texture on the cylinder liners and at lower speeds (900–1200 rpm), a 'rougher surface' with a high core (e.g. Sk) and valley roughness (e.g. Svk) results in higher oil consumption. At the medium speed range (1200–3600 rpm), oil consumption continues to dominate for the 'rough' surfaces but with a visible influence of a lower oil consumption for a decreased roughness within the 'rough' surface group. 'Smooth' surfaces with a 'smooth' core (Sk), irrespective of the valley component (Svk), show similar oil consumption. For engine speeds above 3600 rpms, an increase in plateau roughness results in higher oil consumption. Throughout the study, standard roughness parameters were computed to compare with the results from engine testing and simulation. Future work will be directed to continuous optimization between oil consumption and friction. Improving the understanding of the functional cylinder system surfaces' ability to form oil films in the cylinder system opens up opportunities, not only in reducing the tangential load of piston ring packs but also in optimizing oil viscosity in order to reduce friction.

  • 31.
    Anderberg, Cecilia
    et al.
    Volvo Cars Corporation, Gothenburg, Sweden.
    Dimkovski, Zlate
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Rosén, Bengt Göran
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Thomas, Tom R.
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Low friction and emission cylinder liner surfaces and the influence of surface topography and scale2019In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 133, p. 224-229Article in journal (Refereed)
    Abstract [en]

    A low friction piston ring pack, with tangential load halved, was tested in engines with four different cylinder liner finishes. Oil consumption, oil temperature and liner surface temperature were monitored at different load and speed levels, under similar test conditions. The two smoother surfaces generally kept lower oil consumption compared to the two rougher ones. Results were correlated using an area-fractal analysis. The relative area of the surface was calculated at different scales and the result was compared with the level of oil consumption for the different liner surfaces at different engine speeds. It was found that oil consumption was strongly correlated with scale for areas of above 1000 μm2 and below 20 μm2.  © 2018

  • 32.
    Anderberg, Cecilia
    et al.
    Volvo Cars Corporation, Gothenburg, Sweden.
    Johansson, Staffan
    Volvo Technology, Gothenburg, Sweden.
    Nilsson, Per H.
    Volvo Technology, Gothenburg, Sweden.
    Ohlsson, Robert
    Volvo Powertrain, Gothenburg, Sweden.
    Rosén, Bengt Göran
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Wear Resistance of Smooth Automotive Cylinder Liner Surfaces2005In: World Tribology Congress III, Volume 2, New York, NY: ASME Press, 2005, p. 603-604, article id WTC2005-64281Conference paper (Refereed)
    Abstract [en]

    Demands for decreased environmental impact from vehicles are resulting in a strong push for decreased engine oil, fuel consumption and weight. New machining and coating technologies have offered ways to attack these problems. Engine oil and fuel consumption are to a great extent controlled by the topography of the cylinder liner surface and it is therefore important to optimise this surface. Recent engine tests have shown a reduction in oil consumption when using cylinder liners with a smoother finish than that given by the current plateau honing. However, engine manufacturers are hesitant to introduce smoother liner surfaces because of fears of severe wear and scuffing. There is also the possibility that smoother liner surfaces may be more sensitive to the choice of piston ring finishes. This paper therefore seeks to investigate the functional performance and resistance to wear of these smooth cylinder liners and the mating top ring surfaces. Copyright © 2005 by ASME

  • 33.
    Andersdotter, Katarina
    Halmstad University, School of Business, Engineering and Science.
    Tempo50: En temporär mästerskapsbassäng2018Independent thesis Basic level (university diploma), 15 credits / 22,5 HE creditsStudent thesis
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  • 34.
    Anderson, Helén
    et al.
    Linnaeus University, Kalmar, Sweden.
    Müllern, Tomas
    Jönköping University, Jonkoping, Sweden.
    Danilovic, Mike
    Halmstad University, School of Business, Innovation and Sustainability.
    Exploring barriers to collaborative innovation in supply chains – a study of a supplier and two of its industrial customers2023In: Business Process Management Journal, ISSN 1463-7154, E-ISSN 1758-4116, Vol. 29, no 8, p. 25-47Article in journal (Refereed)
    Abstract [en]

    Purpose: The purpose is to identify and explore barriers to overcome for developing collaborative innovation between a global service supplier and two of its industrial customers in Sweden. Design/methodology/approach: The research had an action-based research approach in which the researchers were interacting and collaborating with the practitioners in the companies. The empirical part includes primary data from multiple interviews, and two workshops with dialogues with participants from the involved companies. The use of complementary data collection methods gave rich input to understanding the context for collaborative innovation, and to uncovering barriers, to develop solutions for collaborative innovation. The empirical barriers were analysed using theoretically derived barriers from a literature review. The analysis generated four broad themes of barriers which were discussed and led to conclusions and theoretical and practical implications on: the customer's safety culture, the business model, the parties' understanding of innovation and the management of collaborative innovation in supply chains. Findings: The thematic analysis generated four broad themes: the customer's safety culture, the business model, the parties' understanding of innovation and the management of collaborative innovation. These themes where analysed using theoretically derived barriers from a literature review. The industrial context, the understanding of innovation and its management created barriers. Originality/value: The unique access to the service supplier and its two independent industrial customers adds a rich contextual framing to the process of identifying and exploring the barriers to collaborative innovation. The conclusion emphasizes the importance of an industrial business context, the business logic in terms of business models and for the understanding and management of collaborative innovation. © 2023, Helén Anderson, Tomas Müllern and Mike Danilovic.

  • 35.
    Andersson, Alexander
    et al.
    Halmstad University.
    Johansson, John
    Halmstad University.
    Fönstertvätt maskin2021Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
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  • 36.
    Andersson, Andreas
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Larsson, Linus
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Förbättrad manövrering av lastvagn2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis has been made on behalf of, and in cooperation with Getinge Sterilization. The purpose of this project has been to develop a solution that makes trolleys of the SMART-trolley series more maneuverable when users are now experiencing them as difficult to maneuver. The handle and the trolleys wheel configuration were identified as the main factors influencing the trolleys maneuverability. Efforts were therefore set up to develop a new handle and a new wheel configuration that solves the maneuvering problem. Along with Getinge a specification of requirements and requests for the new solution was made.

    Initially principle solutions as simple sketches, on possible solutions solving the problem were developed. This was made without taking into account of anyrequirements or requests. Principle solutions are then evaluated against the requirements where the solutions who do not meet the requirements were screened away.

    Handle solutions that made it from the evaluation were presented to Getinge, who selected one of the solutions to develop a prototype from. Therefore, no further evaluations of the handle solutions were made. The selected handle solution underwent primary design process and further develops to best meet requirementsand to be manufacturable in a bending machine. A prototype of the final solution was manufactured.

    Principle solutions for wheel configurations underwent further evaluation, this time against the requests. Wheel configuration solutions that made it from the last evaluation, test prototypes were made and a user test was carried out to obtain a final solution. The result of this thesis is a trolley with an extra wheel pair and a new smaller handle to satisfy the projects purpose.

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    Förbättrad manövrering av lastvagn
  • 37.
    Andersson, Antonia
    Halmstad University, School of Health and Welfare.
    Generationsskite: En studie om hur en offentlig verksamhet arbetar inför ett generationsskifte2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
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  • 38.
    Andersson, Erik
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Bengtsson, Per-Johan
    Halmstad University, School of Business and Engineering (SET).
    Dark Ages Lunar Interferometer (DALI): Deployment-Rover - Mobility System2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis is issued in collaboration with the Jet Propulsion Laboratory (JPL) in Pasadena, California. JPL's primary function is the construction and operation of robotic planetary spacecraft. At the time being JPL has 22 spacecraft and 10 instruments conducting active missions.

    The "Dark Ages" represent the last frontier in cosmology, the era between the genesis of the cosmic microwave background (CMB) and the formation of the first stars. During the Dark Ages, when the Universe was unlit by any star, the only detectable signal is likely to be that from neutral hydrogen (HI).

    The HI absorption occurs in dark matter-dominated overdensities, locations that will later become the birthplaces of the first stars. Tracing this evolution will provide crucial insights into the properties of dark matter and potentially reveal aspects of cosmic inflation. This could be accomplished using a radio telescope located on the far side of the Moon, the only site in the solar system shielded from human-generated interference and, at night, from solar radio emissions.

    Our objective has been the development of the concept of an autonomous rover that would be capable of deploying a large number of low frequency radio antennas on the lunar surface. This is an enabling task for the eventual creation of a radio telescope.

    The project at Halmstad University was divided into three sub-projects, where our area of responsibility has been the development of a concept of the rover's mobility system.

    The result of the project is the concept of a "Rocker-Bogie" suspension system, created in a 3D-environment. A concept which underwent a series of digital analyses and simulations to ensure the compliance with required specifications.

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    Dark Ages Lunar Interferometer (DALI): Deployment-Rover - Mobility System
  • 39.
    Andersson, Ida
    et al.
    Halmstad University, School of Health and Welfare.
    Johansson, Emma
    Halmstad University, School of Health and Welfare.
    Man måste gilla det, annars blir det tufft- en studie om mellanchefers psykosociala arbetsmiljö2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med denna studie var att undersöka mellanchefers upplevelser av den psykosociala arbetsmiljön. Studien baserades på fem utvalda respondenter, där kriteriet var att de befann sig på en mellanposition, med rapporteringsskyldighet både uppåt och nedåt inom organisationen. Insamlingen av data utgick från semistrukturerade intervjuer, och analyserades genom innehållsanalys. Resultatet tyder på att upplevelsen av tydligheten på kraven som ställs, det stora beslutsutrymme och det höga stödet från samtliga parter i organisationen gör att mellancheferna i denna studie upplever den psykosociala arbetsmiljön i organisationen som god. Trots stressigare perioder upplever de att ovan nämnda faktorer reducerar risken för skadlig stress. Till skillnad från tidigare forskning visade analysen av resultatet i vår studie att rollen som mellanchef inte behöver leda till skadlig stress. Slutligen diskuteras studiens arbetsvetenskapliga bidrag och förslag till framtida forskning. 

    Nyckelord: kontroll, krav, mellanchef, psykosocial arbetsmiljö, stöd. 

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  • 40.
    Andersson, Magnus
    Halmstad University, School of Business and Engineering (SET).
    KONSTRUKTION AV AUTOMATISERAD SKYDDSANORDNING FÖR ABB / JOKAB SAFTEYS STAKETSYSTEM2013Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis is basically a design project aimed to find a safe and reliable automatic safety device, which is designed to be suitable for highly automated industrial situations. This device fits with ABB / Jokab Safety’s fence systems. These are built up around machines to create safety distances. The automatic protection device assist the operator in situations when loading or going in and out of the danger zone. Therefore, safety is a big matter in these types of devices control circuits. In this design project the solution is being prepared for the future purpose that is to be CE-marked. The work has had a wide topic range with not just elements within the design subject, but also areas such as risk analysis, reliability, and pneumatics. This has resulted in many stimulating destinations in the design process before it finally led into a prototype that has been function tested. The pneumatic control system was then installed to the mechanical design witch led to the final product. During testing some disturbance in the function occurred and this will have to be corrected before some good results can be shown. Testing the prototype generated a lot of information about the product that could be used to optimize its performance.

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  • 41.
    Andersson, Marcus
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    Jönsson, Simon
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    Konstruktion av kolfiberarmerad motorcykelram2013Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
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    Konstruktion av kolfiberarmerad motorcykelram
  • 42.
    Andersson, Martin
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Åhlund, Anton
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Solenergiutveckling i Halland2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Idag ökar antalet solenergianläggningar stort i Sverige, framförallt inom solelen. Samtidigt finns det inte någon långsiktig hållbar metod för att statistikföra solenergin. Det finns heller ingen regionsspecifik statistik, något som många svenska län och kommuner är intresserade av. Med bakgrund till detta behandlar arbetet frågor om solenergins utveckling med utgångspunkt för Hallands län, där fokus ligger på statistikinsamling.

    För att få en god uppfattning om utbyggnaden av solenergi i länet görs en statistiksammanställning av regionens solenergi. Samtidigt läggs förslag på framtida statistikmetoder för att bättre kunna följa solenergins utveckling i framtiden, regionalt såväl som nationellt. En jämförelse med andra län samt Tyskland och Danmark görs för att fånga upp idéer.

    Jämförelsen visar att Tyskland och Danmark idag har mer utvecklade metoder för statistikinsamling av solel medan de likt Sverige, har begränsad solvärmestatistik.

    Även en lönsamhetsberäkning för en mindre privat solcellsanläggning gjordes. Det visade sig vara lönsamt om anläggningen får skattereduktion eller investeringsstöd. Utan ekonomisk hjälp är lönsamheten lägre, även om utsikterna kan ändras beroende på elprisutvecklingen.

    Resultatet av den regionala statistiksammanställningen visar att Halland i början av år 2014 hade 1,6 GWh i årlig energiomvandling för solel respektive 7,3 GWh för solvärme. I länet finns 5,3 W/capita nätansluten solel jämfört med Sveriges 4,2 W/capita, vilket innebär att Halland har 21 % mer installerad effekt än Sverige i genomsnitt.

    De lämpligaste källorna för insamling av solenergistatistik är energibolag och installatörer där en kombination av dessa två källor ger en stor säkerhet och hög täckningsgrad. Finns bara resurser är detta det bästa alternativet. Rapportering går från dagens manuella metod till ett automatiserat system. En viktig ändring blir att rapportering av lokalisering införs vilket medför att regional statistik enkelt kan sammanställas.

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    Solenergiutveckling i Halland
  • 43.
    Andersson, Matteus
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Rydén, Martin
    Halmstad University, School of Business, Engineering and Science.
    WiseNavigator: Navigationssystem för robotgräsklippare2019Independent thesis Basic level (university diploma), 15 credits / 22,5 HE creditsStudent thesis
  • 44.
    Andersson, Mikael
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Lingvide, Leo
    Halmstad University, School of Business and Engineering (SET).
    Possibilities for small scale hydropower in Honduras2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    With an increased demand of electricity it is in everyone´s interest that investments are made to promote sustainable options, and the question on how to supply clean and sustainable energy is global. In this bachelor’s thesis, funded by SIDA and Åforsk, the intention was to investigate the possibilities for renewable energy in Honduras, a developing country with an expanding energy sector.

    Honduras is Central America´s second largest country, located in-between Guatemala, Nicaragua and El Salvador. The country is one of poorest in the region, and the trade is characterized by the import of oil and export of coffee and fruit.

    Hydropower has played a major role in the development of the Honduran electricity sector, but today oil based thermal power has the largest share of the energy market. It accounts for more than half of the total generation which makes Honduras very vulnerable to changes in the oil price. The remaining share of generation comes from renewable sources, mostly hydropower. The potential for hydropower in Honduras is estimated to be about five times bigger than the current installed capacity. With a constantly rising oil price, building new hydropower or refurbishing old is becoming more and more competitive. This is the reason for this thesis; to investigate the possibilities for small scale hydropower in Honduras. Information has been gathered through contacts with energy organizations as well as examples and experiences from refurbished or upgraded hydropower plants and other relevant hydropower projects. With this information barriers and possibilities in the process of refurbishing, upgrading and building hydropower plants in Honduras have been identified.

    Our conclusion is that developing small scale hydropower in Honduras is very demanding; applying for required permissions, studies, financing, construction etc. are barriers which all require hard work. Considering this we still believe that the possibilities and positive impacts are greater than the barriers and negative impacts when developing small scale hydropower in Honduras thanks to legislated incentives. The positive impacts that can come from building and refurbishing hydropower plants include: cheaper electricity, improved roads, power lines, and schools, promotion of rural electrification and creation of new job opportunities. Small scale hydropower can help Honduras use its natural resources and create a sustainable development for a brighter future.

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  • 45.
    Andersson, Robin
    Halmstad University, School of Business and Engineering (SET).
    Electric power quality in low voltage grid: Office buildings and rural substation2015Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The modern society uses more and more electronic devices needed to being able to function together. This put higher demands on the electrical grid together with that the typical load have changed from the past. Therefore utility companies are obliged to keep the voltage within certain limits for this to function. What exact these limits have been have not always been clear since they have not been gathered in one single document. 

    This thesis is a cooperation with Kraftringen who also has been the initiator. Kraftringen would like to become more proactive in their work regarding electric power quality. For becoming more proactive continuously measurements have to be done but the locations have to be carefully selected in the beginning to get a wider perspective of the grid.

    Energy markets inspectorate (EI) is supervisory of the electric power quality in Sweden and since 2011 they have published a code of statutes (EIFS 2011:2 later 2013:1) intended to summarize limits on voltage. Some of the electrical power quality aspects are not mentioned in EIFS 2013:1 and standards have to be used to find limited values. Flicker and interharmonics are not mentioned in EIFS 2013:1 and for values on flicker the standard SS-EN 50160 has to be used and for interharmonics the standard SS-EN 61000-2-2 state limit values. Besides all this there are standards with stricter limits than EIFS 2013:1 e.g. for total harmonic distortion on voltage were SS-EN 61000-2-2 suggest 6 % instead of 8 %.

    Three different field studies have been conducted in order to get some perception of the present situation regarding electric power quality. Two measurements were conducted on a typical office building because they represents a large part of the typical load in Lund. The third measurement was conducted on a substation in a rural area to get a perception of the situation outside urban areas. 

    These measurements shown that the overall electric power quality was within given limits according to EIFS 2013:1 and different standards. However, conducted measurements shown some interesting results. Both the typical office buildings have a slightly capacitive power factor which results in that the voltage inside the building is going to be slightly higher than at the substation. Since the voltage level at the measured urban substation was above nominal voltage level with about 2-5 % this could be problematic. Another eventual problem with a load with a capacitive power factor is resonance with the inductive parts of the grid like transformers leading to magnified harmonic levels.

    It is suggested that Kraftringen expand their number of permanent electric power quality measurement locations to get a better overview of the present situation. The best suited locations to start with are such that have received complaints earlier, preferably measured on the low voltage side of the transformer for also register the amount of zero sequence harmonics. Next step in the measurement expansion would be substations known to be under higher load than others or substations with a PEN-conductor in a smaller area than the phase conductors, supplying a typical office load with high amounts of third harmonics and unbalance. From this it would be appropriate to spread out the measurement locations geographically to better get to know the grids behaviour. 

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  • 46.
    Andersson, Robin
    Halmstad University, School of Business and Engineering (SET).
    Risk och sårbarhetsanalys av fjärrvärmenätet i Lund2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Fjärrvärmenätet i Lunds stad började byggas 1963 och består idag av 238 km parvisa fjärrvärmerör. Den teoretiska livslängden för fjärrvärmerör är uppskattad till mellan 50-100 år varför det nu börjar bli dags att reinvestera vissa delar. En tydlig indikering om var på fjärrvärmenätet man ska lägga ekonomiska medel för reinvestering eller underhåll är skadestatistik från olika ledningstyper och fabrikat. Kartläggning av fjärrvärmenätets kompensatorer har genomförts och en riskmatris är framtagen baserad på deras geografiska placering och dimension.

    Resultatet är tänkt att finnas som stöd inför kommande budget på Kraftringen om vilka ledningssträckor som är i störst behov av en reinvestering.

    Grunden i rapporten är hämtad från en forskningsrapport från 1999 med avseende på redan framtagna riskmatriser för ledningstyp och jordart. Riskmatrisen för ledningstyp är modifierad något utefter Lunds lokala skadestatistik för en bättre tillämpning. Skadestatistiken för Lund jämförs med den nationella skadestatistik som Svensk Fjärrvärme samlade in under 1995-2003. Ledningstyper och fabrikat jämförs där den helgjutna betonglådeledningen i Lund uppvisar en betydligt högre skadefrekvens än nationellt. En annan rörledningstyp som sticker med en högre skadefrekvens är direktskummade fasta plastmantelrör av märket Pan-Isovit vilket troligtvis beror på den tidiga utbyggnaden i Lund. Fjärrvärmenätet i Lund var först i Sverige med direktskummade fasta plastmantelrör redan år 1966 av märket Pan-Isovit vilket kan ha föranlett skador på grund av bristande erfarenhet och barnsjukdomar.

    Varje ledningssträcka i den lokala databasen har tilldelats en risk som baseras på riskmatriserna för ledningstyp, jordart samt skadestatistik för berörd typ och konsekvensen av ett avbrott beroende på ledningsdimension. Det ger en indikering på risken för avbrott samt konsekvensen av ett avbrott för olika ledningssträckor, dock utan hänsyn till en eventuell ringmatning.  

    För att en reinvestering ska vara motiverad ska utbytet vara lönsamt. Parametrar som påverkar lönsamheten är värmeförluster, skadefrekvens samt goodwill relativt kunderna. Dessa parametrar är beräknade för samtliga ledningssträckor med befintlig ledning och för reinvestering. Vid värdet ett på goodwill, d.v.s. enbart utebliven försäljning uppnås ingen lönsamhet i en reinvestering för någon ledningssträcka. Det är först vid en goodwill-faktor 8 som lönsamhet uppnås. Ett vanligt värde för goodwill hamnar mellan en faktor 50-100 vilket då gör det lönsamt idag att reinvestera 5,7–8,5 % av fjärrvärmenätet.

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  • 47.
    Andersson, Robin
    et al.
    Halmstad University, School of Business, Engineering and Science. 1995.
    Edsinger, Anders
    Halmstad University, School of Business, Engineering and Science.
    Fasadsystem i plåt: Ett system för fasadpaneler som enkelt och snabbt skall kunna monteras.2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Rapporten är resultatet av examensarbetet som utförts av Robin Andersson ochAnders Edsinger tillsammans med Weland AB våren 2017, som vill utöka sittvarumärke genom att förbättra sitt system för fasadpaneler. Welandsmaskinpark är en av de största i norden och deras plåtbearbetning i form avgallerdurk, trappor, räcken och gångbryggor är mycket stor.Fasadbeklädnad kan bestå utav trä, glas, sten, plåt och mycket mer, och är ettsätt för att förfina byggnadens utseende. Produkten skall kunna tillverkas i enhelautomatiserad stans- och panelbockningsmaskin som företaget nyssinvesterat i. Företagets vilja att förbättra deras system gavs i form av ett projekttill författarna som genom undersökningar av produktionsmöjligheterna kommitfram till en eventuell lösning på problemet.Inledningsvis undersöktes möjligheterna kring tillverkningen, och eninformationssökning i form av förfrågan och litteratursökning utfördes. Allt dettaför att en djupare förståelse om verktyg och tillverkning.Arbetet utformade en metod som sedan följdes och efter många beslut fanns detett vinnande koncept som utvecklades till en prototyp.Resultatet blev ett strukturerat system som enkelt kan monteras upp påbyggnadsväggen. U-profiler skruvas först på väggen och därefter kan paneler lättklickas på utan att särskilda verktyg behövs - ett smart och effektivt sätt somförbättrar arbetsmiljön kring byggplatsen.

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    fulltext
  • 48. Andersson, Victor
    et al.
    Knutsson, Elin
    Reconstruction of the Automated Seatbelt2019Independent thesis Basic level (university diploma), 180 HE creditsStudent thesis
    Abstract [en]

    This project tests and validates an automated seatbelt concept created by the authors in a previous course. The testing is made through the use of physical prototypes and from the results a final prototype was made and assembled in a car. The project exhibits the process from design to final prototype, documenting different design iterations and the definitive design. The project evaluates previous designs and their drawbacks, as well as locating the areas with low seatbelt usage. Within the report there is documentation of utilised components, built prototypes and original design.

  • 49.
    Andersson, Viktor
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Olsén, Martin
    Halmstad University, School of Business and Engineering (SET).
    Kilhus i plast: Omläggning av stålprodukt till produkt i plast2010Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Abstract

    Our bachelor degree thesis was carried out in collaboration with Ivar Petterssons Järnmanufaktur AB in Smålandsstenar. We were asked to replace their wedge housing, used to fasten the wires to the power lines, with a similar structure in a plastic material. The idea for this project started with Ivar Petterssons Järnmanufaktur AB having problems with the casting quality that forced them to perform expensive tests on each of the wedge houses to ensure the quality. They are currently produced in China which is also a major drawback because it requires expensive long delivery times.

    The method we used is Fredy Olsson's Princip- and Primärkonstuktion (1995). We have consistently been in the project on so-called "broad front", which means that you create several sketches, ideas and changes in parallel, and then evaluates all. With this method we were able to largely concentrate on the current part of the project, rather than using the more time-consuming "trail and error" method, which is basically doing one idea at a time, and evaluate them one by one.

    At first we were very optimistic and thought we would be able to order form for the injection moulding process, but as the project progressed we found we were not certain that the product would hold and we were forced to present the solution as a concept that will require testing before it’s finished, and not a finished solution.The results we presented for Ivar Pettersssons Järnmanufaktur is a complete drawing on our primary solution, including the release angles. This is because when they decide to go forth with the project, it will be possible to produce a tool without having to make changes to the drawings. Temporary financial calculation shows that the savings may be realized around 1 300 000 SEK by switching to a plastic construction. However we have not been able to verify hours and therefore no cost estimates for the testing done in Sweden, so the actual amount of money saved is larger.

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    FULLTEXT01
  • 50. Andreasson, Joacim
    et al.
    Kühn, Daniel
    SpeedCutBox 2.02014Independent thesis Basic level (professional degree), 15 credits / 22,5 HE creditsStudent thesis
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    SpeedCutBox
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