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van den Berg, J.F. (author), van Rooij, F.J.A. (author), Vos, H. (author), Tulen, J.H.M. (author), Hofman, A. (author), Miedema, H.M.E. (author), Neven, A.K. (author), Tiemeier, H. (author), TNO Bouw (author)Sleep duration is an important concept in epidemiological studies. It characterizes a night's sleep or a person's sleep pattern, and is associated with numerous health outcomes. In most large studies, sleep duration is assessed with questionnaires or sleep diaries. As an alternative, actigraphy may be used, as it objectively measures sleep...article 2008
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TNO Defensie en Veiligheid (author), Koevoets, K.G.M. (author)Performance Based Logistics is betalen voor prestaties, zoals gebruiksuren of beschikbaarheid van systemen. Kan deze manier van uitbesteden ook worden ingevoerd in Nederland en zo ja, onder welke voorwaarden?article 2008
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de Smidt-Destombes, K.S. (author), van der Heijden, M.C. (author), van Harten, A. (author), TNO Defensie en Veiligheid (author)In this paper we consider an installed base of k-out-of-N systems, each consisting of identical, repairable components. A block replacement policy is used to maintain each system and all components are repaired by a single repair shop. System maintenance consists of replacing all failed and degraded components by spares. We focus on the downtime...article 2007
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TNO Bouw en Ondergrond (author), Li, Y. (author), Vrouwenvelder, A.C.W.M. (author)Due to various mechanical, physical and chemical processes, concrete structures are subject to deterioration such as rebar corrosion, cracking and spalling. As most parameters in those processes are random, probability-based reliability analysis is often applied. However, in most studies, spatial variability is not taken into account, although...article 2007
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- TNO Defensie en Veiligheid (author), de Smidt-Destombes, K.S. (author) doctoral thesis 2006
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- TNO Defensie en Veiligheid (author), de Smidt-Destombes, K.S. (author) conference paper 2006
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TNO Kwaliteit van Leven (author), Koningsveld, E.A.P. (author)Introduction: There are many available models that help evaluate the effectiveness of safety and health measures, but many are complex and require input from many departments within an organization. There is a need to develop a more user-friendly model. Method: A participative model was developed that involves face-to-face interviewers with...article 2005
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de Smidt-Destombes, K.S. (author), van der Heijden, M.C. (author), van Harten, A. (author), TNO Fysisch en Elektronisch Laboratorium (author)This paper considers a k-out-of-N system with identical, repairable components. Maintenance is initiated when the number of failed components exceeds some critical level. After a possible set-up time, all failed components are replaced by spares. A multi-server repair shop repairs the failed components. The system availability depends on the...article 2004
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Bos, A. (author), Breebaart, L. (author), Neerincx, M.A. (author), Wolff, M. (author)This paper describes an intelligent maintenance system for Supporting Crew OPErations (SCOPE). SCOPE supports the astronauts onboard the ISS and helps them to maximize the availability of complex payload systems. SCOPE detects system failures, guides the isolation of the root causes of failure, and presents the relevant repair procedures in...conference paper 2004
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Janssen, N.H.E. (author), Boot, E.W. (author), van Gestel, M. (author), TNO Technische Menskunde (author)Recent developments like the Advanced Distributed Learning (ADL) initiative emphasize the application of learning objects. Such modularization of learning content has large implications on the Instructional Design (ID) process. It requires innovation on a didactical, technical and organizational level. In this paper the actual implications of...conference paper 2003
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TNO Technische Menskunde (author), Schaafstal, A.M. (author)The question how the training of beginning technicians can be improved was the starting point of this study. The method Structured Troubleshooting is presented that has resulted in more practice-oriented and job-oriented training. The method has been systematically evaluated. The results show that technicians trained in Structured Trou...conference paper 2002
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Energieonderzoek Centrum Nederland (author), Braam, H. (author), Ramakers, S.G.M. (author), Rademakers, L.W.M.M. (author), Wessels, H.R.A. (author), Prins, R.K.N.J. (author), Lok, R. (author), Leunis, L. (author)In order to obtain a better understanding of the costs resulting fromlightning damages, ECN has defined the projectreport 2002
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Siemes, A.J.M. (author), TNO Bouw (author)The service life of a building or structure is determined by the design and construction in combination with the ageing and the maintenance during use. To get grip on this combination it has advantage to present the functioning of the building or the structure on a performance level. As ageing will influence the performance, the combined effect...conference paper 2002
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Energieonderzoek Centrum Nederland (author), Braam, H. (author), Rademakers, L.W.M.M. (author)With the increasing maturity of wind energy, designers, manufacturers and suppliers are putting more emphasis on lowering the operational costs over the total lifetime in order to improve the economics of wind energy projects. Especially the economics of offshore wind parks will become sensitive to the failure behaviour of the turbines. An...report 2001
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Energieonderzoek Centrum Nederland (author), Braam, H. (author), Rademakers, L.W.M.M. (author)ECN and Baas & Roost Maintenance Consult (B&R) have made a demonstration version of the Maintenance Manager. The purpose of this demonstration version is to offer possible users of the Maintenance Manager (among others: wind turbine manufacturers, service departments, operators, and technical managers of wind farms) the opprtunity to...report 2001
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Cox, C.W.J. (author), Bluyssen, P.M. (author)Within the framework of the EU research project Airless, a long-term experiment of 28 weeks was carried out to investigate the influence of intermittent airflow compared to continuous airflow on the pollution effect of glass fibre filters (F7). No statistical relevant differences between odour intensity and VOC-emissions of the filter exposed to...conference paper 2000
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Björkroth, M. (author), Müller, B. (author), Küchen, V. (author), Bluyssen, P.M. (author)Twelve institutes, universities and companies from seven European countries are involved in the European project, AIRLESS, started up at the beginning of 1998 to develop strategies, principles and protocols to improve and control the performance of HVAC-systems and components to enable their incorporation into codes and guidelines. Knowledge of...conference paper 2000
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Siemes, A.J.M. (author), Bakker, J.D. (author)More than forty years ago in 1957, the first publication was published in The Netherlands indicating the possibility of damage due to ASR in a concrete structure. About ten years ago however the first concrete structure in the Netherlands with alkali-silica reaction (ASR) was documented. During the years before it was generally believed that...conference paper 2000
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Müller, B. (author), Björkroth, M. (author), Plitt, U. (author), Bluyssen, P.M. (author)In the beginning of 1998 a three-year European project, AIRLESS, was started to develop strategies, principles and protocols to improve and control the performance of HVAC-systems and its components for incorporation in codes and guidelines. Twelve institutes, universities and companies, from seven European countries are involved in this project...conference paper 2000
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Schaafstal, A.M. (author), Schraagen, J.M.C. (author), van Berlo, M.P.W. (author)Troubleshooting can often be a time consuming and difficult activity. The question how the training of beginning technicians can be improved was the starting point of the research described in this article. A cognitive task analysis was carried out consisting of two preliminary observational studies on troubleshooting in naturalistic settings,...article 2000