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Janssen, E.G.O.N. (author)
Kassen lijken een typisch Nederlands verschijnsel, maar in steeds meer andere landen worden groenten en bloemen op grote schaal onder glas geteeld. Dat biedt kansen voor Nederlandse kassenbouwers en toeleveranciers. Maar om de buitenlandse concurrentie voor te blijven is innoveren essentieel. TNO helpt de Nederlandse ondernemingen daarbij. Het...
article 2015
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Levie, D. (author), de Kluizenaar, Y. (author), Hoes-van Oeffelen, E.C.M. (author), Hofstetter, H. (author), Janssen, S.A. (author), Spiekman, M.E. (author), Koene, F.G.H. (author)
Background: Ventilation in dwellings is essential for well-being and health. However, insight in determinants of ventilation behavior is still limited. Aim: Identifying determinants of ventilation behavior and quantifying relationships. Secondly, identifying households characteristics associated with low ventilation activity. Methods: In a cross...
article 2014
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Janssen, E.G.O.N. (author), de la Faille, L.T.B. (author), Lohman, W.J.A. (author)
Modern high tech greenhouses are a combination of various technical systems. There are more and more interactions between those systems. Therefore it is hard to adapt greenhouse design to another climate/situation. There is a need for a decision support system, combining practical know how, local parameters, available design models and...
article 2014
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Walters, C.L. (author), Voormeeren, L.O. (author), Janssen, M. (author), Wallin, K. (author)
Standards have traditionally required that fracture toughness specimens be the full thickness of the base material. However, this requirement may be unnecessary, especially if minimum specimen size dimensions based on plastic zone are met and the subsized specimens are statistically adjusted for the size effect. The current paper presents the...
conference paper 2013
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Janssen, E.G.O.N. (author)
Onderzoeksinstituut TNO maakt een wetenschappelijke kennis toepasbaar om het innovatieve karakter van de glastuinbouw te versterken. Voor het focusgebied energie is een nieuwe onderzoekslijn ingezet met systeemintegratie en kasklimaatmodellen. Een gesprek met Egon Janssen, marktmanager Glastuinbouw
article 2012
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Janssen, E.G.O.N. (author), Baart de la Faille, L.T. (author)
article 2011
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Kroesen, M. (author), Molin, E.J.E. (author), Miedema, H.M.E. (author), Vos, H. (author), Janssen, S.A. (author), van Wee, B. (author), TNO Bouw en ondergrond (author)
This study assesses the effects of aircraft noise on residential satisfaction, an important indicator of subjective well-being. A structural equation model is specified that estimates the relationships between objective variables, noise annoyance variables and residential satisfaction. Secondary data-analysis is used to estimate the model. The...
article 2010
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Janssen, E.G.O.N. (author), TNO Bouw en Ondergrond (author)
article 2010
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van 't Ooster, A. (author), van Henten, E.J. (author), Janssen, E.G.O.N. (author), Bongaerts, E. (author), TNO Bouw en Ondergrond (author)
Discomfort caused by light pollution from greenhouses that apply supplementary lighting is an issue in Dutch society nowadays. At this moment Dutch legislation requires an opaque screen that reduces light transmission of the greenhouse wall by 95%. In 2008 also the light transmission of the greenhouse roof must be reduced equally and...
conference paper 2008
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van 't Ooster, A. (author), de Wit, J. (author), Janssen, E.G.O.N. (author), Ruigrok, J. (author), TNO bouw en ondergrond (author)
This research focuses on the role of heat buffers to support optimal use of combinations of traditional and renewable heat sources like geothermal heat for greenhouse heating. The objective was to determine the contribution of heat buffers to effective new combinations of resources that satisfy greenhouse heat, carbon dioxide and electricity...
conference paper 2008
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Janssen, E.G.O.N. (author)
article 2007
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Janssen, E. (author), Zonneveldt, L. (author), Sools, F. (author), TNO Bouw en Ondergrond (author)
TNO has developed a Radiance software model to calculate the light distribution in the greenhouse using raytracing methods, suitable for daylight and artificial lighting. The model is based on a 3D CAD (Computer aided design) model. The objective is to maximize the efficiency of the artificial lighting system (the amount of light from the bulbs...
article 2006
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Janssen, E.G.O.N. (author), Tse, T.C. (author), Mas, J.L. (author), Elvira, J. (author), Hovland, S. (author), TNO Bouw en Ondergrond (author)
This paper describes a design proposal for adapting the OGEGU Food Production Unit (FPU) to the surface of Mars in order to produce up to 40% of the diet for a six-member crew by growing a pre-defined set of vegetable food species. The external structure, lighting system and plant support system are assessed using ESM analysis. The study shows...
conference paper 2005
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Janssen, E.G.O.N. (author), Zonneveldt, L. (author), Sools, F. (author), TNO Bouw en Ondergrond (author)
TNO has developed a Radiance software model to calculate the light distribution in the greenhouse using raytracing methods, suitable for daylight and artificial lighting. The model is based on a 3d CAD model. The objective is to maximize the efficiency of the artificial lighting system (the amount of light from the bulbs reaching the crops)....
conference paper 2005
document
Bakker, J.C. (author), Janssen, E.G.O.N. (author), Tse, T.C. (author), TNO Bouw en Ondergrond (author)
De Nederlandse tuinbouw neemt in de agrarische sector van Nederland en ook in Internationaal verband een leidende positie in. Om een toonaangevende rol in de toekomst te kunnen blijven spelen is het van belang om voortdurend te investeren in innovatie. Zodoende is het project ‘Procesinnovatie Tuinbouwdelta’ opgezet om ketenbrede innovatie te...
article 2005
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