| 1. |
- Bertling, Lina, et al.
(författare)
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RADPOW development and documentation
- 2008
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Rapport (populärvet., debatt m.m.)abstract
- This report summarizes the status of the computer program RADPOW. RADPOW is a program for Reliability Assessment of electrical Distribution POWer systems. It was developed at KTH School of Electrical Engineering, within the research program EKC and the research project on reliability of new electrical distribution systems. Further on, RADPOW has been used and further developed within the RCAM research group at KTH School of Electrical Engineering. This status report contains a brief description of the RADPOW_2006 version, the Loadflow module from the RADPOW_1999_PH version and a description of the work done in the resulting RADPOW_2007 version. This version now includes a tested load flow module and the ability to calculate the latest component importance indices developed within the RCAM research group. The source code for the program has also been restructured and commented in a more detailed level than before.
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| 2. |
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| 3. |
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| 4. |
- Jensen, Kasper P., et al.
(författare)
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A comparison of the tetrapyrrole cofactors in nature and their tuning by axial ligands
- 2008
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Ingår i: Computational modeling for homogeneous and enzymatic catalysis. - 9783527318438 ; , s. 27-56
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- This chapter illustrates how quantum chemical calculations can be used to elucidate structural and functional aspects of tetrapyrrole cofactors, focusing on porphyrins, cobalamins, coenzyme F430, and chlorophyll. A particular emphasis is put on the biochemical significance of axial ligands, which can tune the function of the tetrapyrroles. With the use of quantum chemical calculations, it is possible to draw important conclusions regarding aspects of tetrapyrroles that could not otherwise be accessed. The results show that the general reactivity is mainly determined by the metal and the tetrapyrrole ring system, whereas the electronic structure and reactivity are tuned by the choice of axial ligands, providing a unique insight into the design of cofactors in nature.
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| 5. |
- Jensen, Patrik, et al.
(författare)
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Product development through lean design and modularization principles
- 2009
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Ingår i: Proceedings IGLC 17. ; , s. 465-474
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Konferensbidrag (refereegranskat)abstract
- Customers' demands regarding quality and cost efficiency caused the Swedish construction industry to increase its levels of prefabrication. However, the main focus has been on the structural design and production in the development of these new building systems, and very little attention has been devoted to customer needs and requirements. This has created a situation where ad hoc solutions have been introduced to adapt the building system to match the project requirements, causing problems in the production process with waste and quality problems as a result.Therefore, a development project was initiated with the goal to design a new building system for multi-story timber housing that could match the client needs and requirements. This paper describes how this development process was pursued using lean design methods and modularization principles. A multi-skilled development team worked for over 6 months in developing a technical and a process platform for a flexible building system. The study shows that it is evident that modularization principles can be used in order to develop flexible building systems that better can match the requirements from an individual project. From a set of rules, the architect can configure and design a unique building which enables the manufacturability of the building system and ensures a smooth assembly process of the prefabricated modules on the construction site.
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| 6. |
- Jensen, Patrik, et al.
(författare)
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Reducing complexity of customized prefabricated buildings through modularisation and it support
- 2008
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Ingår i: [Host publication title missing]. ; , s. 429-437
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Konferensbidrag (refereegranskat)abstract
- Many companies in Sweden using prefabricating strategies are currently meeting the ever increasing customer requirements with ad-hoc solutions that do not fit their production system. This is causing bottlenecks and lower profit margins as a consequence. One solution to the problem is to re-engineer their building systems according to modularization principles used in the manufacturing industries, which have adapted their production to be able to meet mass-customization. This paper describes the first part in study of modularization of building systems and if methods used in themanufacturing industry can be adapted to the building industry. The Swedish construction industries using prefabrication strategies are mainly project oriented, and needs todevelop a more product oriented development process to benefit from the values that modularization can give.It is also obvious that it is impossible to introduce modularization methods used in manufacturing industries ifdesign requirements are incomplete or changing from project to project. It is therefore essential that theproduct owner owns the whole process as well. Varying customers’ demands can to some extent be handledusing modularization principles. However, we don’t believe that one solution fit’s all; therefore it is essential to target a specific segment of the market. The cost for the development of such modularized building systemfor the targeted segment of customer must be evaluated against the possible market share.
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| 7. |
- Jensen, Patrik, et al.
(författare)
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Reducing complexity of customized prefabricated buildings through modularization and IT support
- 2008
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Ingår i: CIB-W78. - : Universidad de Talca. - 9789563193619 ; , s. 429-437
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Konferensbidrag (refereegranskat)abstract
- Many companies in Sweden using prefabricating strategies, are currently meeting the ever increasing customer requirements with ad-hoc solutions that do not fit their production system causing bottlenecks and lower profit margins as a consequence. One solution to the problem has been to re-engineer their building systems according to modularization principles used in the manufacturing industries that have adapted their production to mass-customization. This paper describes the first part in study of modularization of building systems and if methods used in the manufacturing industry can be adapted to the building industry. Today the Swedish Construction Industries are mainly project oriented, and needs to go to a more product oriented development to benefit from the values that modularization can give. It is also obvious that it is impossible to introduce modularization methods used in manufacturing industries if design requirements are incomplete or changing from project to project. It is therefore essential that the product owner owns the whole process as well. Varying customers' demands can to some extent be handled using modularization principles. However, we don't believe that one solution fit's all; therefore it is essential to target a specific segment of the market. The cost for the development of such modularized building system for the targeted segment of customer must be evaluated against the possible market share.
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| 8. |
- Wikberg, Fredrik, et al.
(författare)
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Configuration with architectural objects in industrialised house-building
- 2009
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Ingår i: Managing IT in construction. - Leiden : CRC Press/Balkema. - 9780415567442 ; , s. 341-350
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Konferensbidrag (refereegranskat)abstract
- The construction industry is facing the dilemma of simultaneously reducing costs and increas-ing quality. An increasing control and standardization of processes and products is strived for, while at the same time regarding customer and society requirements for architectural variation. Industrialised building and development of house building platforms are examples of this development. The research presented here shows a way to analyze the results of the development of a platform for a multi-storey house building system, specifically with regard to the flexibility of the platform. The analysis is based on the use of architectural ob-jects as design interface in different design levels. The method is shown to complement the traditional QFD methodology, and shows the relative dependence of design decision levels.
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