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  • 151.
    Daerga, Per-Anders
    et al.
    Umeå Universitet.
    Girhammar, Ulf Arne
    Luleå Tekniska Universitet.
    Källsner, Bo
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Suspended floor element connections for the Masonite flexible building system2012In: WCTE World Conference on Timber Engineering, New Zealand, 15-19 July, 2012: Final Papers ; Timber Engineering Challenges and Solutions / [ed] Pierre Quenneville, 2012, p. 465-472Conference paper (Refereed)
    Abstract [en]

    The authors present an experimental study of a suspended floor element connection (sheet steel hangers) employed in the Masonite Flexible Building (MFB) system. The hangers are mounted with screws and are pre-attached to the floor elements at manufacturing. This arrangement makes the design of the hanger critical with respect to safety and load transfer redundancy, since the screws transfer all the loads, both withdrawal and shear forces can act simultaneously. Tests have been carried out to examine the structural behaviour of the hanger. The two most critical load cases, vertical floor load and horizontal wind suction load, and three different screw joint configurations were investigated. The results indicate that the vertical distance between the screw joint and the upper edge of the rim beam should be increased and that withdrawal forces on the screws should be kept as low as possible. Some suggestions for improving the present design are given and a modified design is proposed to enhance the load-bearing capacity and to improve the overall safety and redundancy.

  • 152.
    Daerga, Per-Anders
    et al.
    Umeå Universitet.
    Girhammar, Ulf Arne
    Luleå Tekniska Universitet.
    Källsner, Bo
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    The Masonite flexible building system for multi-storey timber buildings2012In: WCTE World Conference on Timber Engineering, New Zealand, 15-19 July, 2012,: Final Papers, Poster papers / [ed] Pierre Quenneville, 2012, p. 645-650Conference paper (Refereed)
    Abstract [en]

    The Masonite Flexible Building (MFB) system is a complete timber building system for commercial and residential multi-storey houses. The system is subdivided into two market variants; XL and Light. The XL version is for tall and large buildings with long floor spans while the Light version is adapted for smaller buildings with lower loads. Though differing in technical performance, the functional criteria are the same for both variants. The MFB system uses prefabricated wall, floor and roof elements which are delivered in flat packages and erected on the construction site. The MFB system might be classified as a panel construction, where the load-carrying structure consists of composite light-weight timber I-beams mechanically integrated with a composite laminated wood panel called

    PlyBoard™. The I-beams and the panel form a strong and rigid carcass for wall and floor elements, making the system well suited for high rise construction. A key feature of the MFB system is the connection technique which enables swift erection of the system units on site. The plyboard panels are provided with a continuous slot along the periphery. The slot is used as a general connection interface for the joining of the wall elements. The floor elements are suspended and hooked onto the bearing walls using sheet steel hangers, allowing swift assembling of the floor deck and enabling direct vertical wall-to-wall load transfer parallel to grain. The paper presents the construction principles, system components and units, erection technique and functional and architectural aspects of the Masonite Building System. KEYWORDS: Masonite Flexible Building system, multi-storey timber buildings, slotted-in connections

  • 153.
    Dahlberg, Hanna
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Flodin, Sofie
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Modern energisnål bostadsbebyggelse för landsbygden, i svensk tradition2010Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
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  • 154.
    Dammdal, Patrik
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Dyslexi utan diagnos - ett hinder i gymnasieskolan2012Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syfte med föreliggande arbete är att få en uppfattning om hur specialpedagoger på olika gymnasieskolor tänker kring diagnosen dyslexi. Utifrån detta syfte har jag valt att genomföra intervjuer med tre specialpedagoger från olika gymnasieskolor i tre kommuner i södra Sverige. I intervjuerna ställdes frågor rörande kommunikation mellan grundskolors och gymnasieskolors sätt att upptäcka elever med specifika läs- och skrivsvårigheter eller dyslexi och vad för slags stöd gymnasieskolor erbjuder dessa studenter.

    I studien framgår att de skolor som är representerade i undersökningen, erbjöds det flera olika hjälpmedel till elever som behöver ytterligare hjälp för att klara målen som står i kursplanen.

    I undersökningen framgår också vikten av att kontinuerligt följa upp och utvärdera resultaten av den grundläggande läs- och skrivundervisningen, både på individ- och skolnivå. Det är framför allt viktigt att uppmärksamma läs- och skrivsvårigheter vid så tidig ålder som möjligt.

    Genom den här undersökningen har jag kunnat visa på olika upplevelser, erfarenheter och reflektioner som specialpedagoger har kring elevers läs- och skrivsvårigheter. Jag har i resultatdelen belyst det mönster som framkommit ur respondenternas berättelser. Det är sannolikt så att resultatet hade sett annorlunda ut om jag valt att intervjua fler respondenter från andra gymnasieskolor och i andra kommuner.

    Resultatet visar att i de skolor som är representerade i uppsatsen, erbjöds flera olika sorters hjälpmedel till elever som behöver ytterligare hjälp för att klara målen som står i kursplanen, även om de inte hade fått diagnosen dyslexi. Övergången från högstadiet till gymnasiet, för en elev med särskilda svårigheter för läsning och skrivning, sker oftast utan större problem. Kommunikationsproblem förekommer dock när övergången sker från en kommun till en annan.

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    Dyslexi utan diagnos - ett hinder i gymnasieskolan
  • 155.
    Davari, Ali
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Pavicic, Damir
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Das Experiment: -ett försök att skapa den passiva studentbostaden2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This research is in its root about creating the first passive student house that fulfils theSwedish passive house criteria (FEBY). Once the relevant elements have been selected,the data will be obtained from calculations for energy consumption. The calculations will bedone in the two software's VIP-energy and PHPP, where the building will be tested invarious forms and types. The results will later on be compared with one another. Theresearch led to a two-room apartment with a square metre of 36, and the fact that theenergy consumption results are weak when the majority of the windows are on the northfacade. As passive houses heat up through already existing energy inside the house,human body heat, uptimes and ventilation control are all significant factors for the result.

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    Das Experiment
  • 156.
    Davidsson, Sara
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Gustafsson, Viktor
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Streamlining the invisible value chain: - reduction of losses within administrative processes: a case study2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Continuous improvement of various processes within a company is a necessity to remain competitive on the market. There are many different improvement methodologies to streamline work routines; however the different methodologies do not sufficiently embrace administrative processes or the employee motivation regarding changes. The purpose of this thesis has been to develop a model for streamlining administrative processes, while maintaining the employee motivation during the improvement projects implementation phases. The model has been developed theoretically through literature reviews including different improvement methodologies, such as Lean, TQM, Six Sigma, 5S, ISO 9000 and related subjects, while incorporating perspectives of the relations between quality, production and economy. Besides the aspect of continuous improvement, the methodology of Change management has permeated the model development and model outcome. The developed model for improving administrative processes should over time lead to shorten lead-times and streamlined high quality information flows. The first phases in the model have been implemented at Electrolux Laundry Systems providing the company a solid foundation for further implementation of the rest of the model. The results include several highlighted areas, which shall be further reviewed and improved to streamline the current routines at Electrolux Laundry Systems.

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  • 157.
    Debarbouille, Quentin
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Consequences of using Eurocode 5 for design of steel-timber connections2011Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Timber construction has increased in popularity in different countries in Europe thanks to a new material apparition and environmental stakes. In order to construct a timber structure we use different types of connections. The design of connections is complex since it is influenced by many different factors. However, the connection is the weak part of the structure and has high risk of collapse. Therefore the connection often determines the capacity of the structure.In 1975 the commission of the European Community decided to harmonize of technicalities and rules of design in the field of construction. The aim is to increase the competition between companies and simplify the trade of products and services within the European Union. The regulation for timber structures is Eurocode 5 (EC5).This study investigates how the EC5 can influence the design of a connection with a single shear plane for a steel-timber connection with nails or screws. This study is based on the comparison between the connection properties obtained using the EC5 and those recommended in a brochure from one of the large glulam manufacturers in Sweden based on the Swedish regulations.The outcome is that the new regulation has a strong impact on the design of the steel plates. The requirement in minimum spacing imposes a specific dimension and position of the fasteners. Moreover, the capacity of the connection is influenced by the distance between the fasteners parallel to the grain, which determines the effective number of fasteners involved in the connection.

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  • 158.
    Demirci, Tugba
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    A Model For Assessing and Evaluating Production Process Effectiveness When Applying Lean Production -A Case Study2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Measurement is an important process for companies to evaluate their production systems. The purpose of this study is to create a model which will help to companies if they want to measure effectiveness of the production processes when applying lean production. The model consists of twelve steps and considers strategies that has effects on production processes in different perspectives. In order to examine these perspectives systematically, balanced scorecard was used as a tool. Thanks to balanced scorecard measures that is used to reach aim of the model were chosen. In the model pilot processes were offered to implement new production strategy. After measuring effectiveness of two situation of process -before and after implementation- comparison was made with the use of radar chart tool. The result of the model is balanced measurement system and determining effectiveness of the production process when applying a production strategy. The model has been implemented in a manufacturing company, Melam that is implementing lean production. At the end of the case study lean measures were identified and production process effectiveness was determined. According to determination further decisions were given by decision makers. Implementations were not found enough and thanks to the model, applying an unsuccessful implementation was prevented. 

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    fulltext
  • 159.
    Deumic, Emina
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Hedin, Madelaine
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Utvärdering av skalväggar som byggnadsmetod2010Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Checking of blueprints, time plans and calculations for the reference project house-N in Växjö have helped us to map double walls' advantages and disadvantages. From interviews, we have seen similarities and difference what different people in same sector think, and how they make their conclusions. It is not always simple to decide the preferable building method in order to make the project cost-effective, prefabricated or suite-built. Factors such as the building's frame, season, work environment, resources, time and cost take considerations' to.

    Through better planning, increase of prefabrication and achieving a better collaboration between developers, consultants, contractors, subcontractors and material suppliers, it is generally considered that it may increase the industrialization of the building. Then procurement of shorter construction times and lower overall costs can be achieved 

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    FULLTEXT01
  • 160.
    Deumic, Emina
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Sadic, Damir
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    FE analysis of interlocking C3C solid concrete blocks without casting2011Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Solid concrete Lego blocks can be used as temporary retaining wall systems or as wall separators between different materials such as sand, salt, compost, etc. The advantage of concrete blocks is that you can create temporary constructions. It is easy to move or expand the constructions when no casting is required between the blocks. The purpose of this study is to make models in the Finite Element (FE) software Abaqus/CAE that can be used for calculations of the capacity for interlocking blocks. FE method is an approximate method for solving differential equations. As the concrete blocks are stacked without casting, it is important to find out the construction’s load capacity when it is subjected to a horizontal load. Several types of structures have been modeled in the FE program Abaqus/CAE. These FE models were created with boundary conditions consisting of springs and a pinned connection that allows rotation.The evaluation has been focused on rotating the interlocking blocks. With the help of the FE models, reaction forces have been calculated. The FE results in term of reaction forces have been compared with hand calculations made ​​for the same models. Moreover, a wall and a wall with lateral supports have been simulated to determine the horizontal reaction force for the interlocking concrete blocks.

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  • 161.
    Devine, Åsa
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Internationalization and Performance among Small and Medium-sized Firms: A study of furniture producers in Sweden2010Doctoral thesis, monograph (Other academic)
    Abstract [en]

    Furniture production in Sweden still exists on a comparably small scale. The majority, or more than 99 percent, of all furniture producers in Sweden are small and medium sized enterprises (SMEs) with less than 250 employees. Despite their size, these firms are, to a large extent, involved in export. This is fully in line with the accelerating trend of internationalization found among firms of all sizes. However, research focused on internationalization has been primarily concentrated on larger firms, which is unfortunate considering that the vast majority of all firms within the European Union can be described as SMEs. The purpose of this research is, therefore, to extend our understanding of internationalization and performance among small and medium sized firms by explaining export involvement and performance among small and medium sized furniture producers in Sweden.

    This research is completed within the theoretical framework of the modified PSE model, which consists of four components: perception of export barriers, strategy competence, export involvement, and performance. A quantitative survey was conducted among 324 firms, yielding a response rate of 56 percent. The empirical data was analyzed using the methods of multiple linear regression, logistic regression, and ordinal regression.

    The result suggests that strategy competence, measured in terms of relatedness and market knowledge, explains the main export mode and performance among exporting SMEs. In addition, main export mode seems to explain performance. The main findings of this research are visualized through a new model, SCEMPER. Another finding is that barriers originating with the owner/key decision-maker of a firm seem to prevent firms from becoming involved in export. In addition, attitude towards export and the age of the firm appear to be important determinants of export involvement and performance among SMEs.

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    FULLTEXT01
  • 162.
    Dodik, Josip
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Dodik, Mario
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    En jämförelse av 6 aktuella bostadsområden i Sverige med uttalad inriktning på hållbart stadsbyggande2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Under det senaste århundradet har det dykt upp många miljöproblem som har lett till att vi idag måste fokusera mer på en hållbar utveckling av våra städer.

    Allt fler människor väljer att bo i städer och därför är det viktigt för vår framtid att stadsplaneringen blir så hållbar som möjligt.

    Denna rapport beskriver och värderar 6 olika hållbara stadsdelar i Sverige. Dessa har identifierats och värderats utifrån 6 hållbarhetsaspekter som anses vara viktiga.

    Studierna har begränsats till hållbar utveckling inom stadsplanering, de pa- rametrar som tas upp i examensarbetet ”En jämförelse av 6 aktuella bo- stadsområden i Sverige med uttalad inriktning på hållbart stadsbyggande” är; Transport, Social Hållbarhet, Grönskande Utomhusmiljö, Hållbara Transporter, Hållbart Energisystem, Miljöanpassade Bostäder & Lokaler, Hållbart Vatten & Avlopp och Hållbar Återvinning. 

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    fulltext
  • 163.
    Dodoo, Ambrose
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Primary energy impact of ventilation heat recovery in a timber-frame building with different heat systems.2012In: Forum Holzbau Nordic, Växjö 12: International Holzbau-Forum Nordic Växjö 12 (IHN 2012),  Nordic Wood Construction Conference Vertrie, 2012Conference paper (Other academic)
    Abstract [en]

    Here, we analyze the impact of ventilation heat recovery (VHR) on the operationprimary energy use of a case-study timber-frame building using different heatsupply systems including electric resistance heating, bedrock heat pump and districtheating based on combined heat and power (CHP) production. We model theprimary energy use for the original and improved level of energy efficiency of thebuilding, both with and without VHR. VHR increases the electrical energy used forventilation and reduces the heat energy used for space heating. Significant primaryenergy savings is achieved when VHR is used in electric resistance heatedbuildings than in district heated buildings. For district heated buildings the primaryenergy savings are small. VHR systems can give substantial final energy reduction,but the primary energy benefit depends strongly on the type of heatsupply system, and also on the amount of electricity used for VHR and the airtightnessof buildings. This study shows the importance of considering the interactionsbetween heat supply systems and VHR systems to reduce primary energyuse in buildings.

  • 164.
    Dodoo, Ambrose
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Gustavsson, Leif
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Impact of thermal mass on lifecycle primary energy use of concrete- and timber-frame versions of a building2012In: Presentation at COBEE 12, International Conference on Building Energy and Environment. Boulder, Colorado, USA, August 1-4, 2012Conference paper (Refereed)
  • 165.
    Dodoo, Ambrose
    et al.
    Mid Sweden University.
    Gustavsson, Leif
    Linnaeus University, Faculty of Science and Engineering, School of Engineering. Mid Sweden University.
    Sathre, Roger
    Mid Sweden University.
    Building energy-efficiency standards in a life cycle primary energy perspective2011In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 43, no 7, p. 1589-1597Article in journal (Refereed)
    Abstract [en]

    In this study we analyze the life cycle primary energy use of a wood-frame apartment building designed to meet the current Swedish building code, the Swedish building code of 1994 or the passive house standard, and heated with district heat or electric resistance heating. The analysis includes the primary energy use during the production, operation and end-of-life phases. We find that an electric heated building built to the current building code has greater life cycle primary energy use relative to a district heated building, although the standard for electric heating is more stringent. Also, the primary energy use for an electric heated building constructed to meet the passive house standard is substantially higher than for a district heated building built to the Swedish building code of 1994. The primary energy for material production constitutes 5% of the primary energy for production and space heating and ventilation of an electric heated building built to meet the 1994 code. The share of production energy increases as the energy-efficiency standard of the building improves and when efficient energy supply is used, and reaches 30% for a district heated passive house. This study shows the significance of a life cycle primary energy perspective and the choice of heating system in reducing energy use in the built environment.

  • 166.
    Dodoo, Ambrose
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering. Mittuniversitetet, Östersund.
    Gustavsson, Leif
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Sathre, Roger
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Effect of thermal mass on life cycle primary energy balances of a concrete- and a wood-frame building2012In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 92, p. 462-472Article in journal (Refereed)
    Abstract [en]

    In this study we analyze the effect of thermal mass on space heating energy use and life cycle primary energy balances of a concrete- and a wood-frame building. The analysis includes primary energy use during the production, operation, and end-of-life phases. Based on hour-by-hour dynamic modeling of heat flows in building mass configurations we calculate the energy saving benefits of thermal mass during the operation phase of the buildings. Our results indicate that the energy savings due to thermal mass is small and varies with the climatic location and energy efficiency levels of the buildings. A concrete-frame building has slightly lower space heating demand than a wood-frame alternative, due to the higher thermal mass of concrete-based materials. Still, a wood-frame building has a lower life cycle primary energy balance than a concrete-frame alternative. This is due primarily to the lower production primary energy use and greater bioenergy recovery benefits of the wood-frame buildings. These advantages outweigh the energy saving benefits of thermal mass. We conclude that the influence of thermal mass on space heating energy use for buildings located in Nordic climate is small and that wood-frame buildings with cogeneration based district heating would be an effective means of reducing primary energy use in the built environment.

  • 167.
    Dodoo, Ambrose
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Gustavsson, Leif
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Sathre, Roger
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Life cycle primary energy analysis of conventional and passive house buildings2011In: Proceeding SB11, World Sustainable Building Conference, Helsinki, Finland, October 18-21, 2011Conference paper (Refereed)
  • 168.
    Dodoo, Ambrose
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Gustavsson, Leif
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Sathre, Roger
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Lifecycle primary energy analysis of conventional and passive houses2012In: International Journal of Sustainable Building Technology and Urban Development, ISSN 2093-761X, E-ISSN 2093-7628, Vol. 3, no 2, p. 105-111Article in journal (Refereed)
    Abstract [en]

    In this study we analyse the primary energy implications of thermal envelope designs and construction systems, for a 4-storey apartment building, including the full lifecycle phases and the entire energy chains. We maintain the architectural design of the reference building, and alter the thermal properties of the envelope components and include heat recovery of ventilation air to achieve buildings with thermal properties similar to three existing passive houses in Sweden. We also vary the building frame material from the reference wood case to reinforced concrete, and vary the heat supply system between district heating and electric resistance heating. We follow the lifecycle of the buildings and analyse and compare their lifecycle primary energy use, considering the production, operation and end-of-life energy uses. The results show that the lifecycle primary energy use of a passive house building is substantially lower when it is heated with district heating instead of electricity. A passive house with district heating uses 42–45% less lifecycle primary energy than the same house with electric heating. Lifecycle primary energy use is 2–4% less when a passive house is constructed with a wood frame instead of a concrete frame. This study shows that material choice becomes increasingly important as buildings are made to the passive house standard and as efficient heat supply systems are used.

  • 169.
    Dodoo, Ambrose
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Linnaeus University, Faculty of Science and Engineering, School of Engineering. Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Sathre, Roger
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Primary energy implications of ventilation heat recovery in residential buildings2011In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 43, no 7, p. 1566-1572Article in journal (Refereed)
    Abstract [en]

    In this study, we analyze the impact of ventilation heat recovery (VHR) on the operation primary energy use in residential buildings. We calculate the operation primary energy use of a case-study apartment building built to conventional and passive house standard, both with and without VHR, and using different end-use heating systems including electric resistance heating, bedrock heat pump and district heating based on combined heat and power (CHP) production. VHR increases the electrical energy used for ventilation and reduces the heat energy used for space heating. Significantly greater primary energy savings is achieved when VHR is used in resistance heated buildings than in district heated buildings. For district heated buildings the primary energy savings are small. VHR systems can give substantial final energy reduction, but the primary energy benefit depends strongly on the type of heat supply system, and also on the amount of electricity used for VHR and the airtightness of buildings. This study shows the importance of considering the interactions between heat supply systems and VHR systems to reduce primary energy use in buildings.

  • 170.
    Dodoo, Ambrose
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Gustavsson, Leif
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Implications of households building and car preferences for primary energy use and carbon dioxide emissions2012In: ICAE 2012, 2012, p. 249-257Conference paper (Refereed)
  • 171.
    Dugic, Izudin
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Inoculation of Grey Cast Iron and the Influence on Metal Expansion Penetration2011In: Proceedings book of the 11th International foundrymen conference Foundry Industry – Significance and Future Challenges / [ed] Unkić, Faruk, Croatia: University of Zagreb , 2011, , p. 12p. 378-389Conference paper (Refereed)
    Abstract [en]

    One of the most important factors which influence the microstructure evolution of cast iron is nucleation. Nucleation of eutectic phase in grey cast is assumed to take place heterogeneously. Inoculation is the most common method to influence the heterogeneous nucleation. The choice of inoculants used in grey cast iron production today is probably one of the most important parameters to obtain good quality of castings component. In some grey cast iron components which are cast in sand moulds, the metal some time penetrates into the mould producing surface defects and causes difficulties when cleaning the components. 

    The present work utilizes the latest development of primary austenite inoculation in combination with classic eutectic inoculation to limit the metallurgical contribution to metal expansion penetration. A solid shell containing the primary austenite dendrite network constitutes the barrier between the liquid metal and mould interface. Inoculants of both the primary- and eutectic phase control the permeability of the dendrite network

  • 172.
    Dugic, Izudin
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Metal Expansion Penetration on Casting Components of Grey Cast Iron2010Conference paper (Refereed)
    Abstract [en]

    Cast irons are a family of sophisticated design materials with precise engineering properties.

    In some grey cast iron components which are cast in sand moulds, the metal sometimes penetrates into the mould producing defects which cause difficulty when cleaning the components. Metal penetration is a casting surface condition resulting from either physical, mechanical and/or thermo chemical reactions or a combination of these at the mould–metal interface.

    The present work will summarize research efforts to understand the mechanisms of metal expansion penetration performed in collaboration with Swedish foundries. The main parts of the experimental works are based on some casting components.

  • 173.
    Dugic, Izudin
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Diozegi, A
    Svensson, I. L.
    Metal Expansion Penetration on Concave Casting Surfaces of Grey Cast Iron Cylinder Heads2010In: International Foundry Research/Giessereiforschung, ISSN 0046-5933, Vol. 62, no 1, p. 38-23Article in journal (Other academic)
    Abstract [en]

    Cylinder heads have an extremely complex shape withlarge areas of concave casting surfaces. The concavecasting surfaces are often associated with metalexpansion penetration problems or other surfacedefects, e. g. surface shrinkage. The defects cause highproduction costs due to component rejection andincreased fettling time. This report presents aninvestigation of the microstructure in grey cast ironclose to the sand-metal interface affected bymetal penetration in a complex shaped casting.The dominant penetration defect observedin the cylinder heads was expansion penetration.Even pre-solidification penetration and sandcrack defects were observed. The microstructurefound in the non penetrated areas is typicalfor solidification of grey iron cast in sand moulds.

  • 174.
    Dugic, Izudin
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Karlsson, Christian
    Älmhults Foundry AB.
    GIFA 2011 – New opportunities2011In: Swedish Foundry Technical Association Conference, Nyköping, Sweden, 2011Conference paper (Other (popular science, discussion, etc.))
  • 175.
    Dvinskikh, Sergey V.
    et al.
    Royal Institute of Technology KTH, Division of Physical Chemistry and Industrial NMR Centre, SE-100 44 STOCKHOLM, .
    Furó, István
    Royal Institute of Technology KTH, Division of Physical Chemistry and Industrial NMR Centre, SE-100 44 STOCKHOLM, .
    Sandberg, Dick
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Söderström, Ove
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Moisture content profiles and uptake kinetics in wood cladding materials evaluated by a portable nuclear magnetic resonance spectrometer2011In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 6, no 3, p. 119-127Article in journal (Refereed)
    Abstract [en]

    We have evaluated the capability of nuclear magnetic resonance (NMR) technology based on small portable magnets for in situ studies of the local moisture content in wood. Low field and low resolution 1H NMR with a unilateral permanent magnet was used to monitor and map the moisture content of wood cladding materials of various types in a spatially resolved manner. The results show that portable NMR equipment based on small open-access permanent magnets can be successfully used for non-invasive monitoring of the moisture content in various extended wood specimens. The moisture content was measured with a depth resolution of 0.2 mm and a maximum penetration depth of 3 mm. This makes the technique suitable for e.g. in situ local moisture content measurements beneath a coating layer in the claddings and it is also possible to relate the moisture level to specific properties of the wood material.

  • 176.
    Edlund, Pia
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Jämförelse mellan viltbehandlade och obehandlade granplantor: Med inriktning på höjdtillväxt och betesfrekvens2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The report is a comparative study between spruce plantations where 4 plants are treated with deer repellents and 4 plantations are untreated. The study aims to provide a base for the Forest Society's future decisions regarding the use of wildlife-repellents.  The report indicates that wildlife-repellents work reasonably well for its purpose, the treated stocks were virtually untouched during the planting year and next year while the untreated stocks have been heavily grazed during these years.  Growth difference between grazed plants and ungrazed plants found to be virtually non-existent (0, 01 m) of the treated stocks and 0, 07 m in the untreated plants. Because of the growth differences are so small between grazed and no grazed plants, it seems like the treatment of deer-repellent are unnecessary. Unless you know in particularly that the area has a specific problem whit severe deer-grazing.

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  • 177.
    Einvall, Jessica
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Parsland, Charlotte
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Benito, Patricia
    University of Bologna.
    Basile, Francesco
    University of Bologna.
    Brandin, Jan
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    High temperature water-gas shift step in the production of clean hydrogen rich synthesis gas from gasified biomass2011In: Biomass and Bioenergy, ISSN 0961-9534, E-ISSN 1873-2909, Vol. 35, no Supplement 1, p. S123-S131Article in journal (Refereed)
    Abstract [en]

    The possibility of using the water-gas shift (WGS) step for tuning the H2/CO-ratio in synthesis gas produced from gasified biomass has been investigated in the CHRISGAS (Clean Hydrogen Rich Synthesis Gas) project. The synthesis gas produced will contain contaminants such as H2S, NH3 and chloride components. As the most promising candidate FeCr catalyst, prepared in the laboratory, was tested. One part of the work was conducted in a laboratory set up with simulated gases and another part in real gases in the 100 kW Circulating Fluidized Bed (CFB) gasifier at Delft University of Technology. Used catalysts from both tests have been characterized by XRD and N2 adsoption/desorption at −196 °C.

    In the first part of the laboratory investigation a laboratory set up was built. The main gas mixture consisted of CO, CO2, H2, H2O and N2 with the possibility to add gas or water-soluble contaminants, like H2S, NH3 and HCl, in low concentration (0–3 dm3 m−3). The set up can be operated up to 2 MPa pressure at 200–600 °C and run un-attendant for 100 h or more. For the second part of the work a catalytic probe was developed that allowed exposure of the catalyst by inserting the probe into the flowing gas from gasified biomass.

    The catalyst deactivates by two different causes. The initial deactivation is caused by the growth of the crystals in the active phase (magnetite) and the higher crystallinity the lower specific surface area. The second deactivation is caused by the presence of catalytic poisons in the gas, such as H2S, NH3 and chloride that block the active surface.

    The catalyst subjected to sulphur poisoning shows decreased but stable activity. The activity shows strong decrease for the ammonia and HCl poisoned catalysts. It seems important to investigate the levels of these compounds before putting a FeCr based shift step in industrial operation. The activity also decreased after the catalysts had been exposed to gas from gasified biomass. The exposed catalysts are not re-activated by time on stream in the laboratory set up, which indicates that the decrease in CO2-ratio must be attributed to irreversible poisoning from compounds present in the gas from the gasifier.

    It is most likely that the FeCr catalyst is suitable to be used in a high temperature shift step, for industrial production of synthesis gas from gasified biomass if sulphur is the only poison needed to be taken into account. The ammonia should be decomposed in the previous catalytic reformer step but the levels of volatile chloride in the gas at the shift step position are not known.

  • 178.
    Ekblad, Emelie
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Strategy 2 Performance: Turing Strategy 2 Performance through Successful Implementation2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study was to understand key challenges in turning

    strategy to performance, and with that as a fundament suggest a model

    for the strategy implementation process. The work is based on a

    theoretical framework that brings together and merges different areas of

    science to create new synergies and leveraged results. In this case, the

    area of Strategic Implementation receives added value from mainly

    Innovation- and Knowledge Management, as aspects of the intersection

    between Industrial Dynamic and Organizational Behavior. Moreover, due

    to the strategic focus, additional theory regarding Technology Marketing

    is also included. Departing from the theoretical framework, an empirical

    study was conducted by qualitative interviews of two managerial levels at

    an international conglomerate.

    The outcome of both theoretical and empirical findings is discussed and

    analyzed, and results in two main recommendations, addressing the

    question of how the challenges could be solved with innovation and

    knowledge management as a fundament for implementation. One of the

    main recommendations is cyclic implementation routines, advancing in a

    loop consistent of; Strategic selection; Enabling of effective knowledge

    acquisition; Implementation; and Learning. The other main

    recommendation is an Innovative and learning organization, involving

    Shared vision, leadership and the will to innovate; Appropriate structure;

    Effective Team Working; Continuing and stretching individual

    development; Extensive communication; High involvement in

    innovation; External focus; and a Creative climate.

    Coherent with these recommendations, a model is presented where the

    cultural components could be regarded as the fundament of the

    organization, which is complemented with the learning cycle and regard

    to the organization’s holistic level of maturity. This model strives to

    inspire to “manage the flow of organizational culture to make the wheels

    of implementation routines spin”.

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  • 179.
    Ekelöf, Henrik
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Hasselby, Fabian
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Fuktförebyggande åtgärder för ett bättre klimat i den småländska stenkyrkans krypgrund2010Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Fukt i kyrkans krypgrund är ett ”växande” problem som på senare tid uppmärksammats alltmer. I denna studie har flera möjliga lösningar undersökt, vidare har en allmän angreppsmodell formulerats för att underlätta framtida utredningar. Studien visar bland annat att styrning efter mögelrisken är önskvärt för att få ett energioptimerat och garanterat mögelfritt klimat. Åtgärdsförslag såsom sorptionsavfuktare samt värmning genom elradiator direkt i krypgrunden är möjliga lösningar som med ett litet energitillskott förbättrar klimatet i krypgrunden avsevärt.

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  • 180.
    Eldonson, Martin
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Jönsson, Stig
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Motivation på fordonsprogrammet2011Independent thesis Advanced level (professional degree), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [sv]

    För att få en ansvarstagande, målmedveten och motiverad elev krävs att eleven naturligtvis har ett intresse för utbildningen. Han/hon måste dessutom få en rättvis bild av det program han söker, genom sin studie- och yrkesvägledare.

    Brist på motivation kan bero på olika faktorer och är ofta individuell. Svårt att hinna med i undervisningen på programmet och läxor gör att vissa elever tappar sugen. Detta faktum gör att eleven får svårt att klara utbildningen.

     

    I vår teori har vi tagit till oss olika författare och skribenters åsikter och kunskap i olika böcker och pedagogiska tidskrifter. Där tar de upp motivationens betydelse och hur vi lärare ska tänka för att få en omotiverad elev att känna det meningsfullt och känna tillfredställelse med sina studier. Vi tittar även på vilka grundförutsättningar det krävs för att lyckas med sina studier. Omotiverade elever skapar ofta en negativ stämning i klassen.   

    Hur skall vi då gå till väga för att klara denna situation och få med oss de elever som inte har samma ambition som de som vill i klassen. Det kan vara en svår nöt att knäcka.

    Stig har i sin tidigare undersökning Motivation på fordonsprogrammet (2002) kunnat se att där fanns tendenser som pekade på att vissa elever var omotiverade och inte tillräckligt motiverade att gå utbildningen.

    I vårt arbete vill vi undersöka om det finns omotivation bland fordonseleverna och hur vi ev. kan motivera dessa och ändra inställningen hos dessa. Som metod för undersökningen valde vi att ha anonyma enkäter som vi delade ut bland alla fordonsprogrammets närvarande elever. Vi gjorde även en enkät bland våra kolleger på programmet.

     

    Med vår undersökning har vi kommit fram till att vi hade en del omotiverade elever trots att de flesta hade svarat att de trivdes. Skrämmande var att hälften av eleverna inte åt och sov ordentligt. Då är det svårt med motivation.

    Den visar också på att det behövs bättre information från grundskolan, fler studiebesök och föreläsningar om t.ex. framtidsutsikter inom fordonsbranschen samtidigt som det behövs ny teknik och att lokalerna behöver ses över.

    Det tål kanske att tänka på hur man kan lägga upp teorin på ett mer intressant och roligare vis och kanske försöka få med kärnämnena i uppgifter som har med fordon att göra.

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  • 181.
    Elfborg, Elisabeth
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Johannesson, Oscar
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Betydelsen av den fysiska arbetsmiljön i förhållandet till lärandet.: En studie om elevers uppfattning och koppling mellan sitt lärande och den fysiska arbetsmiljön på de yrkesförberedande programmen i årskurs två.2011Independent thesis Basic level (professional degree), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study is to investigate if there is any significance of the physical work environment in relation to learning. The survey was conducted with the help of literature studies and questionnaires answered by students in five vocational programs in year two. The results revealed students' views on school and workplace physical education learning environment. Examples of conditions that students noted was the ventilation, lighting, meal environment and the teacher. According to literature studies, the multiple factors in the physical work environment that influence learning such as sound, light, ventilation and maintenance condition of the working environment.

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    Examensarbete.pdf
  • 182.
    Eliasson, Lars
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Ställ krav på virket: Rätt virke för produktion i framtidens trähusfabrik2011Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis investigates the needs and opportunities for the Swedish wood house industry to obtain wood material with properties meeting demands of both producers and final customers. A common problem within the Swedish wood house industries is the insufficient quality of the wood material that companies purchase for their production. These flaws in quality can render an additional annual cost for the industry of approximately 10 million Euros.

    Wood house companies express a certain resignation regarding communication with wood material suppliers. However, timber suppliers claim that they rather receive very few complaints regarding timber quality from wood house companies and other purchasers. For a timber supplier, being able to offer an acceptable price is often a determining factor, since most deals will go to the supplier offering the lowest price.

    This has led to a non-existent dialogue between suppliers and purchasers regarding how to approach the wood quality issue. This study has, among other things, studied the preparation of sawn wood into finished components, for instance, the production of knotfree boards. The results illustrate the importance of carrying out evaluations of raw material and suppliers. Furthermore, results show that the cutting cost for wood components, including waste is approximately 1/3 of the total cost for ready-made components. However, in relation to the total cost of the house the timber cost is low. This means that a higher price for wood that fully meets the target specifications, will have limited impact on the total cost for the house.

    The wood house industry is recommended to present firm demands for a high-quality material and to evaluate material and suppliers. In addition to this, the wood house industry should aim towards becoming a modern manufacturing industry, like those most successful manufacturing industries in other fields.

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  • 183.
    Eliasson, Lars
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Gustafsson, Åsa
    Linnaeus University, Faculty of Business, Economics and Design, Linnaeus School of Business and Economics.
    Quality deficiencies regarding softwood in the pre-fabrication industry for single-family timber houses2012In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 8, no 1, p. 53-63Article in journal (Refereed)
    Abstract [en]

    The members of the pre-fabricated single-family house industry perceive problems securing the quality of incoming material. Thus the implication is that they need to carry out a quality inspection and adjust the softwood timber as it arrives at their facilities in order to fit the production. Furthermore, due to the intense competition among companies in the pre-fabrication industry, there is a focus on reducing non-value-adding activities such as deficiencies. Consequently, the purpose of this study is to propose a number of propositions regarding quality deficiencies in softwood timber for the pre-fabrication of single-family houses. This study, conducted through interviews based on the theoretical aspects of properties, quality inspection and quality deficiency formulates seven fundamental propositions regarding quality deficiencies in this industry. The main differences among the companies studied are their purchased volume and extent of information and communication technology support in production. This fundamental description of quality deficiencies regarding softwood for the pre-fabrication of single-family houses will enable companies to focus on quality issues with their raw-material suppliers and thereby increase the competitiveness of softwood timber as a construction material in the industry.

  • 184.
    Eliasson, Lars
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Kifetew, Girma
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Volume yield and profit in the production of clear finger-jointed Scots pine (Pinus sylvestrisL.) boards2010In: European Journal of Wood and Wood Products, ISSN 0018-3768, Vol. 68, no 2, p. 189-195Article in journal (Refereed)
  • 185.
    Eliasson, Lars
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Sandberg, Dick
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Trähusföretag tappar fördel i slarvig tillverkning.2011In: Husbyggaren, ISSN 0018-7968, no 7, p. 24-27Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    BYGGMETODER Ska trä öka sin konkurrenskraft måste trähusföretag och virkesleverantörer bli bättre på att både ställa och uppfylla kravspecifikationer. Idag kan materialspill och felleveranser uppgå till närmare en femtedel av virkeskostnaden.

    Trähusbranschen står inför ett antal utmaningar. Avgörande är att kunna producera attraktiva bostäder till en kostnad som inte är högre än att människor har råd.

    Trähusföretagen utnyttjar inte fullt ut material och metoder som är anpassade för en effektiv produktion av hus i fabrik. I den kontexten får träets miljöfördelar en underordnad betydelse i konkurrensen med andra mindre miljömässigt uthålliga material.

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  • 186.
    El-Thalji, Idriss
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Analyzing Wind Power Asset ManagementSystem: System-Level Methods of Inquiry2010Conference paper (Other academic)
  • 187.
    El-Thalji, Idriss
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Systems Dependability Engineering for Wind Power Applications: Challenges, Concepts, and System-Level Methodologies2010Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Complexity and uncertainty have impacted wind power systems and their applications.Commercial wind power asset exhibits complex system behaviour due tostochastic loading characteristics of its installation context. However, differentstakeholders’ practices in whole life cycle processes try to treat multi-disciplinarycomplexity issues. Moreover, wind power system failures, stoppages, faults, supportdelays and human/organizational errors provide a clear proof of increasingthe needs for dependability. Therefore, dependability is considered as an aggregatetheory for RAMS (Reliability, Availability, Maintainability, Safety & Supportability)in order to cope with complex systems (i.e. physical systems and their assetmanagement systems) and their behaviour phenomenon. Consequently, to addresswind power practical problem as one of the modern complex and interdependentsystems, it is worth to enhance both the way of how we look at dependability andthe method of inquiry. Technical system complexity, system interdependency andsystem learn-ability are the main challenges within system dependability field.Therefore, this research work is done to integrate both terotechnology and systemsengineering methodologies to enhance systems dependability theory and practices.In particular, it focuses on three main aspects within systems dependability engineering:challenges, practitioners’ concepts and system-level methodologies.The research methodology of this thesis has utilised the mixed research approachof qualitative and quantitative methods to extract the empirical findings that arerequired to validate the dependability theory developments. Qualitative survey isused to identify the challenges of dependability theory within wind power applications.Grounded theory is used to define the practical understanding of windpower stakeholders concerning to dependability and asset management concepts.Case study is implemented to validate the systems dependability engineering, ascross edge theory of dependability and systems engineering. Moreover, the phenomenographymethod is used to capture the individual experiences and understandingof purposefully selected stakeholders, due to different site-specific circumstancesfor each wind farm.In general, the thesis contributes to the body of knowledge of five fields: dependability,terotechnology, asset management, systems engineering and wind energy.In particular, the focus of thesis contributes with retrospective review to be as referenceline for system dependability theory. Simultaneously, on basis of empiricalfindings, it contributes to be a pivot point for further enhancements from both theacademic contributions and industrial developments.

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  • 188.
    El-Thalji, Idriss
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Terotechnological-Engineered WindTurbine’s Drive-train: Systems Engineering Analysis2010Conference paper (Other academic)
  • 189.
    El-Thalji, Idriss
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Liyanage, Jayantha P
    University of Stavanger.
    Integrated asset management practices for Offshore wind power industry: A Critical review and a Road map to the future2010In: The Proceedings ofThe Twentieth (2010) InternationalOFFSHORE AND POLAR ENGINEERINGCONFERENCE / [ed] Jin S. Chung, 2010, p. 934-941Conference paper (Refereed)
    Abstract [en]

    In comparison to Onshore, the Offshore wind farms and their life cycle operations have number of different aspects to consider. Nowadays, different technological solutions are being tested for design, construction, installation, operating and maintaining of offshore wind farms. Still the challenges are quite diverse and mostly seen relating to; design of electrical infrastructure, structural design and material choice for aggressive environmental and seasonal conditions, site assessment and optimal set-up, substructures, installation methods, logistics, technical service access, operations & maintenance, etc. First the paper reviews technical and physical aspects of the mechanical, electrical, and structural subsystems and their critical failure scenarios as a stand point for assessing the current technological solutions and industrial applications. The second part of the paper attempts to map the status quo within offshore wind industries and assess the current status with respect to an optimum performance criteria expected. It critically reviews, in particular, the technical and operational integrity concepts which have some influence from systems design process, cost-optimal maintenance approaches, and supportive decision making applications, intelligent remote diagnostics prognostics techniques and their feasibility, etc. Thus this paper contributes in many different ways bringing a multi-disciplinary perspective, and leading the way towards further research and industrial applications from integrated asset management point of view.

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  • 190.
    Engqvist, Peter
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Andersson, Sara
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Kartläggning och förslag till förbättring av projektflödet2010Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The main purpose of this thesis is to survey and find possibilities of improvements in the project flow. The report only touches the parts of the company which are located in the early parts of the project flow, hence alterations can be made at a low cost. The gathering of information was made by open conversations, with some prepared questions. The information has been gathered from several parts of the company such as sales, project management, and construction et cetera. We consider it to be profitable to increase the resources in the improvement work. The company should also investigate the distribution of responsibility in the work of improvement. The complaints are too many and many of the faults are similar.

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  • 191.
    Enofe, Obamwonyi Martyn
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Improving Maintenance Perception in Developing Countries - A Case Study2009Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Despite the continuous evolving world of technology, maintenance has responded tremendously in meeting this rapid technological change. Nevertheless, inadequate maintenance has become one of the most issues faced by organizations in developing countries. Maintenance is seen as an unimportant activity in most developing countries thus, it is not given high priority due to insufficient/ minimal knowledge about the concept. Hence, the purpose of this thesis (submitted for Total Quality Maintenance at the Department of Terotechnology) is to enhance the perception and maintenance in developing countries.

    A case study was performed at Power Holding Company of Nigeria (National Electric Power Authority). The company is responsible for the production, transmission and distribution of electricity in Nigeria. The analysis shows that proper education and training can facilitate or increase the perception of maintenance in developing countries.  However, for the case company, the study shows that not having appropriate maintenance in place is the major problem behind the company’s inability to achieve its objectives. Thus maintenance practice can be improved significantly with proper maintenance education and training. The result from the study shows the concept of maintenance education and training program and who it should address.

    One major conclusion that can be drawn from the analysis is that major developments in developing countries are associated with modern technology from developed countries. Thus, maintenance should be given a top priority because keeping the proper functioning of the technologies depends greatly on DCs proficiency, in order to ensure viability of the development policies so as to obtain the benefit from modern technologies.

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  • 192.
    Enofe, Obamwonyi Martyn
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Aimienrovbiye, Gregory
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Maintenance impact on Production Profitability  - A Case Study2010Independent thesis Advanced level (degree of Master (One Year)), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Maintenance has had a tremendous impact on company’s proficiency to optimize its production system in order to meet its long term objectives. Generally, a production system in which maintenance is not given attention may easily lead to the system producing defective product as a result of machine defect.

    The purpose of this thesis is to utilized tools and methods to analyze the impact of maintenance implementation in a production system. The analytical Hierarchy process was utilized to filter the defining factors and sub-factors considered to be related to the life length and performance of production equipment in the research which was carried out at SCA Packaging Sweden AB. Various cost associated with these factors were analyzed using the cost breakdown structure, an element of life cycle cost analysis. Finally, economic evaluation of the filtered factors was performed to show the benefits associated with implementing maintenance.

    The result shows that while investment on maintenance implementation might be a cost at the earlier stage of implementation because it is hard to measure and follow up its impact on company’s business. Nevertheless, its role in improving company productivity profitability is indispensable. Thus, maintenance is a profit centre rather than a cost centre.

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  • 193.
    Eren, Nurdan
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Sat, Yusuf Hasim
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Layout Design of A Third Party-Logistics Centre: A Case Study2010Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    The purpose of this thesis is to develop an integrated model which involves creative and analytical features for designing a cost effective logistics centre layout on operational level, with respect to time and space utilization. Engineering methods, creative skills, simulation and multi-criteria decision making methods were integreted in the  developed model. The model has been implemented and validated in Oskarshamn Intralog, which is a sister company of Scania. After applying the model in the case company, three different layout concepts were generated based on engineering and simulation techniques. These concepts were evaluated from utilization of space, time and flexibility aspects. Furthermore, multi criteria decision making method was used to select the most cost effective layout concept among these concepts. Different aspects helped to see various effects of warehouse operations on layout design. Simulation was used as a powerful tool to test cycle time within designed concepts. Clearly it was concluded that a combination of two concepts led to reach the expected results as an optimum point among space, time utilization and flexibility which fullfilled the answer to both academical and practical problem

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  • 194.
    Ericsson, Judit
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    En studie av projektet Datorn som pedagogiskt verktyg enligt modell 1–1 ur ett lärarperspektiv2011Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
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  • 195.
    Eriksson, Emil
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Hammarstedt, Anna
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Utveckling av barnskyddande kapsyl2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Emballator Växjöplast AB arbetar med att utveckla och tillverka kapsyler till

    världens ledande varumärken. De arbetar ständigt med utveckling och design av

    kapsyler för att skapa identitet, funktion och försäljning. Detta har lett till att

    företaget idag är Nordens största kapsyltillverkare.

    Dagens sortiment av 28mm barnskyddande kapsyler består av två varianter, öppen

    mynning eller insatspropp. De tillverkas i materialet polyoximetylen eller i

    polypropen i kombination med en liner. Båda materialen har god kemikalieresistans.

    De förslutningar detta projekt innefattar är de klassiska ”tryck och vrid”.

    Barnskyddande förslutningar har höga krav på sig och ska klara av

    kemikalieinspektionens tillsyn gällande barnskydd. Samtliga av företagets kapsyler

    är godkända, trots det finns ett problem på förpackningar som kommer ut till kund

    där barnskyddet inte är tillräckligt. Detta kan leda till reklamation hos företaget och

    utgör en risk att barn kan få i sig innehållet.

    För tre år sen ställdes ett test av Emballator Växjöplast AB, detta test har analyserats

    i detta projekt. Det går att konstatera att taket på kapsyler som är i direktkontakt med

    innehållet sväller, och därmed delvis tappar sin funktion då taket når ytterhättan. Då

    en liner används som barriär mellan vätskan och kapsylen sker ingen betydande

    svällning. Den idé vi valt att vidareutveckla är en kombination med liner, även till de

    kapsyler med insatspropp. Med detta sätt kommer samtliga kapsylkombinationer ha

    liner i sig. Utifrån de resultat vi hittills kunnat se kommer risken att kapsylerna

    sväller minska. Förslutningarna kommer då samtidigt bli tätare så vätska inte når

    gängorna, vilket gör att öppningsmomentet påverkas mindre. Även

    öppningsmomentet är ett problem idag då det i vissa fall är för lågt vid första

    öppningstillfället hos konsument.

    Ur det ekonomiska perspektivet ser vi att det skulle bli lönsamt att använda

    polypropen tillsammans med en liner till samtliga kapsyler. Denna idé skulle

    dessutom reducera antalet kapsyler. Användning av en liner till kapsyler i

    polyoximetylen är idag uteslutet för det skulle bli mycket dyrt och därför inte vara ett

    alternativ för kund.

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    fulltext
  • 196.
    Eriksson, Åslin, Margareta
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Vad betyder anställningsbar?: En studie om hur man ser på anställningsbarhet i bageribranschen2012Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    With the introduction of the new curriculum Gy11 VET, vocational education and training

    changed from being a vocational. Now the focus is to make the students employable after

    completion of secondary education.

    Employability is a broad term and the meaning changes depending on who uses it.

    The question is whether the interpretations are different in the industry and in the schools and

    that it therefore cannot achieve Gy 11's goal of employability?

    To investigate whether there is consensus on the concept I interviewed six teachers in the

    restaurant and food program, and six representatives from the industry. They have all left their

    opinions on employability through qualitative interviews and these were compiled into a result.

    The results showed a consensus over what they considered most important for employability,

    which was the basic skills in the profession.

    Download full text (pdf)
    fulltext
  • 197.
    Erkers, Jörgen
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Pourlotfi, Mohsen
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    20 minuters skönlitteratur läsning på första lektionen för dagen: Vilka effekter ger det i läsförståelse och kunskapsutveckling hos gymnasieelever?2012Independent thesis Basic level (professional degree), 60 credits / 90 HE creditsStudent thesis
    Abstract [sv]

    Vår undersökning om läsprojekt på viskastrandgymnasiet som innebär 20 minuters skönlitteratur läsning på första lektionen på dagen utfördes via enkätutdelning till årskurs två elever från 5 olika program. Vi ställde 12 bestämda frågor i syfte att få information om elevers åsikter angående läsning och dess effekter i utveckling av läsförståelse och kunskap. Resultatet har visat att en majoritet av tillfrågade eleverna bekräftar att 20 minuters läsning under den första lektionen på dagen ger positiva effekter i deras läsförståelse, skriv förmåga, avslappning, koncentrations förmåga och utveckling i kunskap. Att 20 minuters morgonläsning är viktigt håller 67 % av elever med om, men vår undersökning har också visat att det finns en minoritet med Ca 33 % av eleverna alltså 16 av 49 tillfrågade, som inte tyckte det. Tidigare nationella och internationella undersökningar visar att elevers läsförståelse har försämrats, vilket beror på läslusten hos elever. En jämförelse av vår undersökning med både nationella och internationella studier som gjorts tidigare, visar ungefär samma resultat. Det kan vara olika faktorer som påverkar läslusten hos elever, bland anat deras personliga identitet, grupptillhörighet, uppväxt miljö, föräldrarnas utbildningsnivå, och mm. Men i vår undersökning har visat sig att elever med högutbildade föräldrar har högre läslust jämför med de övriga. Trots att det finns ett svagt intresse hos en del av eleverna i läsprojekt har vår studie visat att det finns en vinst för skolor att bedriva det.

    Download full text (pdf)
    20 min skönlitterär läsning.
  • 198.
    Evald, Lars
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Hoffert, Jonas
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Hur ser intresset & kunskapen ut kring handledning bland byggnadsarbetare inom Kattegattgymnasiets upptagningsområde?2012Independent thesis Basic level (professional degree), 60 credits / 90 HE creditsStudent thesis
    Download full text (pdf)
    fulltext
  • 199.
    Fagerberg, Nils
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Dags att diskutera lönsamheten i kontinuitetsskogsbruk2011In: Jord & Skog, p. 2-2Article in journal (Other (popular science, discussion, etc.))
    Download full text (pdf)
    Jord&Skog
  • 200.
    Fagerberg, Nils
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Industrin eller skogsägarna - vems behov ska styra?2012In: Ett brott i skogen? / [ed] Harald Holmberg, Skellefteå: Ord & Visor förlag , 2012, 1, p. 129-133Chapter in book (Other (popular science, discussion, etc.))
    Download full text (pdf)
    Brott i skogen
1234567 151 - 200 of 668
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