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  • Resultat 46221-46230 av 87451
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46221.
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46222.
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46223.
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46224.
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46225.
  • Martin, Aronsson, et al. (författare)
  • Trächassi : Projektrapport TMMI53
  • 2016
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • Det här projektet har undersökt möjligheten att bygga ett chassi av trä till en Formula student-bil. Det skall undersökas om chassit är konkurrenskraftigt både gällande vikt och prestanda gentemot den stålram som idag används. Formula student är en racingtävling för team från olika universitet runt om i hela världen. Enligt reglerna i den tävlingen finns det vissa komponenter i chassit som måste vara i stål. Vi har tagit hänsyn till dessa regler, men i övrigt så långt som möjligt använt träbaserade material.
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46226.
  • Martín-Chivelet, Nuria, et al. (författare)
  • Analysis of the Technological Innovation System for BIPV in Spain 2022
  • 2022
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • This report analyses the Technological Innovation System (TIS) of the Building Integrated Photovoltaic (BIPV) technology in Spain as it was in March 2022; the analysis aims to facilitate and support the implementation of BIPV and the innovation and industrial BIPV solutions development. It starts by identifying the actors, networks, and institutions to perform the structural analysis. Then, the functional analysis includes a review of the BIPV-related publications, projects, and patents. Interviews with relevant experts in the field and tailored surveys addressing each stakeholder group have completed the experimental basis for the eight defined TIS functions assessment. Results show that BIPV knowledge development in Spain has sufficient quality, although it is mainly limited to the scientific and academic fields; the innovation system needs further technological and market knowledge, more in BIPV roofing than in BIPV façade solutions. Also knowledge dissemination is weak, especially between the photovoltaic and the construction sectors. Entrepreneurial experimentation, also identified in the construction sector, is slowly increasing, and more companies’ competency is needed. When it comes to resources, there are funds for PV research, development, and innovation projects, but aids are not specific to BIPV. Besides, there is a lack of BIPV-qualified technicians; BIPV is directly competing with building added photovoltaics (BAPV), usually with lesser costs and faster growth due to the PV selfconsumption’s success. About the development of social capital, smooth communication and trust are essentially limited to just the known agents, so some initiatives are necessary to improve this market driver. Concerning legitimation, there is good acceptance and perception of BIPV from architects and general society; however, two main barriers increase the customers’ resistance to including BIPV: costs and lack of related regulations. Two major difficulties are that BIPV is not explicitly in the Technical Building Code, and there are no specific financial incentives or subsidies for BIPV. The BIPV market in Spain is still a niche market, slowly growing and with good future perception. The search guidance is not clear but starts from a general framework that, despite all, could be favourable to BIPV development; BIPV can benefit from the support addressed to PV self-consumption and buildings’ energy retrofit projects. To further develop BIPV towards a commercial market, it is recommended to include BIPV in building codes and get in place BIPV-specific incentives. Other suggestions to boost BIPV in Spain are at the end of the report. The annexes contain lists of BIPV projects, patents, publications, and relevant stakeholders.
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46227.
  • Martin, David, et al. (författare)
  • Analysis for robust sheet forming processes at high temperatures - Hotform : Analyser för robusta plåtformningsprocesser vid höga temperaturer - Hotform
  • 2015
  • Rapport (refereegranskat)abstract
    • Project vision Building accurate and robust models of the hot forming process requires a detailed understanding of a number of key technical questions pertaining to what is a technologically very complex process, including:  The physical metallurgy, microstructure and properties of modern hot formable steels during and after the hot stamping process  The thermophysical properties (thermal diffusivity, thermal expansion) of modern sheet steels and modern tool materials used in the hot stamping process  The constitutive behavior (strength, work hardenability, anisotropy) of the sheet material during forming  Real temperature-time histories of the formed sheet during hot forming, and heat transfer between sheet and tool  The behavior of the Al-Si coating applied to modern hot formable steels during heating and forming  The role of tool material and surface finish and the influence of different classes of surface coatings on the tribology of the hot forming The answers to these questions can be distilled down into a series of technical parameters and material data which are required for use in finite element simulation. The project aimed to develop methods and conduct experiments which would provide these technical parameters as a way of improving the quality and usefulness of finite element simulation tools for the hot stamping process. The overall goals of the project were  Increase understanding of technical features of the hot forming process  Develop new experimental methods for the analysis of hot forming  Enhance forming simulation accuracy  Shorten lead time for tool production  To maximize the efficiency of the forming tools relative to the cost  Increased productivity of the hot forming process
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46228.
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46229.
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46230.
  • Martin, Juan Carlos, et al. (författare)
  • Allocation of infrastructure cost in the air transport sector
  • 2008
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • This report highlights the main results obtained in WP6 regarding the allocation of infrastructure cost in air transport sector. In this deliverable, it has been shown that there are important economies of scale in airport operations, and, thus, it can justify the current trend of capacity expansion programs observed in major hubs. For the year 2006, the range of estimated economies of scale varies between 4.36 and 1.23, with an average value of 1.75. A basic methodology was proposed in order to analyze the likely level of output at which the economies of scales would be exhausted. The industry's minimum efficient scale (MES) was calculated to be at 2.27 million ATM737. The most interesting conclusion to draw from this result is that, within the current technological frontier, the world's leading airports will continue to benefit from scale economies in the provision of infrastructure for air transportation and commercial activities until they reach between two or three times their current scales.
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