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- van Staden, M. (author), Ellen, G.J. (author), TNO Strategie, Technologie en Beleid (author) report 2004
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den Hartog, F.T.H. (author), Bastiaans, B.L.G. (author), Blom, M.A. (author), Pluijmaekers, M.G.M. (author), van der Mei, R.D. (author)We have investigated and compared various aspects of the storage of multimedia content at residential gateways (RG) in the home or at caches in the public network. From qualitative analyses of Personal Video Recording and Content Delivery Networking techniques, we conclude that service architectures incorporating storage on the RG as well as in...conference paper 2004
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van den Berg, H. (author), Litjens, R. (author), Laverman, J. (author), TNO Telecom (author)We present a flow-level performance evaluation for a UMTS/HSDPA network. The results provide thorough insights into the performance impact of a number of key system, environment and traffic aspects, e.g. terminal location, the presence of intercellular interference, the intrinsic feedback delay in the channel quality indications, soft combining...conference paper 2004
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den Hartog, F.T.H. (author), Balm, M. (author), de Jong, C.M. (author), Kwaaitaal, J.J.B. (author), TNO Telecom (author)A new OSI-based model is described that can be used for the classification of residential gateways. It is applied to analyze current gateway solutions and draw evolutionary paths for the medium to long term. From this it is concluded that particularly set-top boxes and broadband modems, as opposed to game consoles and PCs, have a strong...article 2004
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van Wolfswinkel, R.N. (author), Burgmeijer, J.W. (author), op de Beek, S.S. (author), Mioulet, K. (author)This paper is based on actual experiences of our institute in supporting city councils and public organisations aiming to stimulate the broadband access evolution. It highlights the current situation in the Netherlands and stimulates the discussion of the possible roles of government in modern countries. It gives a new and comprehensive overview...conference paper 2004
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Holub, J. (author), Beerends, J.G. (author), Smid, R. (author)This contribution deals with the estimation of the relation between speech transmission quality and average call duration for a given network and portfolio of customers. It uses non-intrusive speech quality measurements on live speech calls. The basic idea behind this analysis is an expectation that the average call duration is higher for calls...conference paper 2004
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- van Lieshout, M. (author), Ellen, G.J. (author), van Reekum, R. (author), TNO Strategie, Technologie en Beleid (author) report 2004
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- van Sandick, E.H.D. (author), TNO Strategie, Technologie en Beleid (author) report 2004
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- van As, D.M. (author), Edelenbos, J. (author), Slob, A.F.L. (author), Stoter, W.S.R. (author), TNO Strategie, Technologie en Beleid (author) report 2004
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TNO Informatie- en communicatietechnologie (author), van Deventer, M.O. (author), van Wegberg, M. (author)Het is een hype Voice-over-IP (VoIP) voor te stellen als een ontwrichtende technologie die de telecomindustrie ingrijpend zal veranderen. Maar hoe ontwrichtend is VoIP eigenlijk? Oskar van Deventer en Marc van Wegberg analyseren drie vormen van VoIP en laten zien dat alleen ‘VoIP-chat’ potentieel een bedreiging is voor telefoniebedrijven.other 2004
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Studiecentrum voor Technologie en Beleid TNO (author), Driessen, H. (author), van Duivenboden, H. (author), During, R. (author), Frissen, V. (author), Hoving, D. (author), Ponsioen, A. (author), van Staden, M. (author)TNO has conducted research commissioned by the Dutch Ministry of the Interior and Kingdom Relations into the effective use of information and communication technology (ICT) in the public sector in Europe. The purpose of the research was to establish whether it is worthwhile investing in e-Government initiatives, and to determine how back-office...report 2004
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Smeele, P.M.T. (author), Waals, J.A.J.S. (author), TNO Technische Menskunde (author)For the evaluation of a speech-driven telephone flight information service we applied the PARADISE model developed by Walker and colleagues [1] in order to gain insight into the factors affecting the user satisfaction of this service. We conducted an experiment in which participants were asked to call the service and book a flight. During the...conference paper 2003
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Neerincx, M.A. (author), Veltman, J.A. (author), Grootjen, M. (author), van Veenendaal, J. (author), TNO Technische Menskunde (author)This paper summarizes a Cognitive Task Load (CTL) model, which describes the effects of (envisioned) task allocations and support functions on operator performance and mental effort. The CTL-model distinguishes three load factors: the classical measure percentage time occupied, the number of task-set switches and the level of information...conference paper 2003
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- Willems, P.H. (author), TNO Bouw (author) article 2003
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Bos, S.C. (author), Waterhouse, J. (author), Edwards, B. (author), Simons, R. (author), Reilly, T. (author), TNO Technische Menskunde (author)The endogenous circadian oscillator (the body clock) is slow to adjust to altered rest-activity patterns. As a result, several negative consequences arise during night work and after time-zone transitions. The process of adjustment can be assessed by measurements of the sleep electroencephalogram (EEG), core temperature or melatonin secretion,...article 2003
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Verschuren, J. (author), Degen, A.J.G. (author), Veugen, P.J.M. (author)A few decades ago, most computers were stand-alone machines: they were able to process information using their own resources. Later, computer systems were connected to each other enabling a computer system to exchange data with another computer and to use resources of another computer. With the coupling of computer systems, security items emerge...conference paper 2003
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Bargh, M.S. (author), Laarhuis, J.H. (author), Plas, D.J. (author), TNO Telecom (author)Service platforms are gradually becoming common functional entities in the next generation networks, i.e., in 4G-environments. By providing value-added capabilities to networks and end-users, and facilitating service provisioning for 3rd party service providers, the service platforms will prove indispensable in the near future. However, with...conference paper 2003
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van der Mei, R.D. (author), van den Berg, J.L. (author), Vranken, R. (author), Gijsen, B.M.M. (author)We study mean sojourn times in a multi-server processor sharing system with two priority classes and with general service-time distributions. For high-priority customers, the mean sojourn time follows directly from classical results on symmetric queues. For low-priority customers, in the absence of exact results, we propose a simple and explicit...article 2003
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Fledderus, E.R. (author)Het staat buiten kijf dat ICT en mobiele data vrijwel elke industriële sector zullen beïnvloeden, ongeacht of het fysiek-intensief of kennis-intensief is. Het beïnvloedt de wijze, plek, en de tijd van actie, en te oordelen naar de weinige succesvolle voorbeelden vergt het een vooruitziende blik en grote bekwaamheid om de verandering zodanig te...conference paper 2003
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Neerincx, M.A. (author), TNO Technische Menskunde (author)This paper summarizes a method for Cognitive Task Analysis that guides the early stages of software development, aiming at an optimal cognitive load for operators of process control systems. The method is based on a practical theory of cognitive task load and support, which can be used to establish adequate task (re-)allocations and to design...conference paper 2003