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Van Adrichem, N.L.M. (author)The host-to-host IP model currently supporting the Internet does not suffice in supporting current-day content distribution in the form of content-sharing via peer-to-peer applications, real-time media streaming and social networks. Since the design of IP, the usage of the Internet has changed from a messaging and few-to-few information sharing...master thesis 2012
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Li, C. (author), Van de Bovenkamp, R. (author), Van Mieghem, P.F.A. (author)We introduce the ?-susceptible-infected-susceptible (SIS) spreading model, which is taken as a benchmark for the comparison between the N-intertwined approximation and the Pastor-Satorras and Vespignani heterogeneous mean-field (HMF) approximation of the SIS model. The N-intertwined approximation, the HMF approximation, and the ?-SIS spreading...journal article 2012
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Abegaz, B.W. (author)This thesis presents a control architecture and utility maximization mechanisms for a smart grid based energy community. The particular focus is upon a central server based, utility-oriented energy community which is composed of producer-consumer (prosumer) households each having a home gateway, an energy management system, smart meters,...master thesis 2012
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Elavarasu, P.P. (author)The goal of this thesis was to optimize a audio conferencing system that communicate via the standard Wi-Fi network and to provide a maximum transmission delay of 5 ms (one way end to end delay of 10 ms) when coexisting with an interferer that use up to 50% of the channel bandwidth. First the QoS performance provided by the existing 5th...master thesis 2012
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Spijkers, R.A. (author), Swager, I.S. (author)Voor het maken van scans van het cardiovasculair gebied is het noodzakelijk de MRI-scanner te synchroniseren met de hartslagcyclus. Dit wordt cardiac triggering genoemd. Door de hoge magnetische veldsterkte treden synchronisatiefouten op, waardoor de scans erg onduidelijk en daardoor onbruikbaar worden. Het doel van dit onderzoek was het...bachelor thesis 2012
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Van den Oever, M. (author)Monitoring critical structures such as oil pipe lines or dikes is essential for performing in-time and high-quality maintenance. Such structures cover a large area or are in abandoned places. Consequently, performing physical inspections by dedicated personnel is either impossible or very expensive. Alternatively such structures can be inspected...master thesis 2012
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Ramkumar, A. (author)Ultra-wideband (UWB) is a promising radio technology which is well suited to low power short-range wireless applications. At Holst Centre/imec, there is a research program on the design and implementation of ultra low power, Impulse Radio-UWB (IR-UWB) wireless systems suitable for audio streaming and real time localization systems. Some key...master thesis 2012
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Tessema, N.M. (author)The wide deployment of wireless sensor nodes for varieties of applications calls the need for distributed beamforming as a cooperative scheme to efficiently use spectrum, to improve communication range and to save precious battery power during transmission. Given that there are a large set of cooperative cognitive radio users, ensuring the...master thesis 2012
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Van Mieghem, P.F.A. (author), Cator, E. (author)Since the Susceptible-Infected-Susceptible (SIS) epidemic threshold is not precisely defined in spite of its practical importance, the classical SIS epidemic process has been generalized to the ??SIS model, where a node possesses a self-infection rate ?, in addition to a link infection rate ? and a curing rate ?. The exact Markov equations are...journal article 2012
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Shastry Ravishankar, D. (author)The Super Regenerative Receiver was invented by Armstrong in 1922 [1]. It is used in various applications such as sensor networks, short distance telemetry, home automation, biomedicine, remotely controlled systems, etc., because of its simplicity and low power design. In the classical super regenerative receiver, the RF oscillations obtained at...master thesis 2012
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Argyrouli, A. (author)The goal of this thesis is to investigate the clustering effect of droplets in the water clouds. The initial motivation came from the incapability of millimeter-wave cloud radars to always detect low-level liquid water clouds. The observed discrepancy between the value of radar reflectivity factor estimated by radar measurements and the...master thesis 2012
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Trommel, R.P. (author), Feenstra, T. (author)7T MRI-scanners kunnen met de huidige technieken nog niet nauwkeurig genoeg getriggerd worden voor het uitvoeren van scans van hoge kwaliteit. In opdracht van het LUMC is er daarom een project opgestart om een systeem te ontwerpen dat biomedische signalen kan meten, verwerken en versturen om de 7T MRI-scanner te kunnen triggeren. Er zijn drie...bachelor thesis 2012
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Basavarajappa, V. (author)The use of radars in detecting low flying, small targets is being explored for several decades now. However radar with counter-stealth abilities namely the passive, multistatic, low frequency radars are in the focus recently. Passive radar that uses Digital Video Broadcast Terrestrial (DVB-T) signals as illuminator of opportunity is a major...master thesis 2012
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Raghavendrarao, P.G. (author)Long Term Evolution (LTE) is the latest high speed mobile broadband technology that is gaining widespread attention due to its high data rates and improved Quality of Service (QoS). Initially, LTE was seen as a technology for supporting high speed data, but there is a growing interest in the industry to support voice over LTE. The support of...master thesis 2012
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Vaddagiri, K. (author)Cancer can be viewed as a curse on life of any man or woman. Although some tumors that are malignant can be curable, it comes at a cost of unbearable pain and mental trauma. X-ray based techniques are being used for many decades for detecting tumors. These techniques are applied at the expense of exposure to high ionized radiation levels....master thesis 2012
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Charalampidou, K. (author)Mass processing of social media posts has been brought to scientists' attention during the last decade. The massive growth of online social networks, like Twitter and Facebook, have created a need for determining peoples' opinions and moods through these means. This thesis constitutes a research on measuring users' sentiment upon a particular...master thesis 2012
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Raghunathan, S.B. (author), Gan, C.H. (author), Van Dijk, T. (author), Ea Kim, B. (author), Schouten, H.F. (author), Ubachs, W. (author), Lalanne, P. (author), Visser, T.D. (author)We report a plasmon steering method that enables us to dynamically control the direction of surface plasmons generated by a two-mode slit in a thin metal film. By varying the phase between different coherent beams that are incident on the slit, individual waveguide modes are excited. Different linear combinations of the two modes lead to...journal article 2012
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Sridharan, V. (author)Non-coherent on-off keying (OOK) receivers are preferred in ultra low power (ULP) wireless devices as they consume less power when compared to receivers based on other modulation schemes. However, these devices are highly susceptible to co-channel interference (CCI). Therefore, interference cancellation (IC) techniques for ULP non-coherent OOK...master thesis 2012
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Dekker, T.D. (author), Jaspers, M.J. (author)Met behulp van een MRI-scanner kan er bij een patiënt een afbeelding gemaakt worden van de binnenkant van het lichaam zonder dat deze opengemaakt hoeft te worden. Deze afbeeldingen worden gemaakt om een diagnose te stellen. De arts kan beter zien wat er aan de hand is met de patiënt als de resolutie van de afbeelding verbetert. De resolutie kan...bachelor thesis 2012
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Trajanovski, S. (author), Scellato, S. (author), Leontiadis, I. (author)The study of real-world communication systems via complex network models has greatly expanded our understanding on how information flows, even in completely decentralized architectures such as mobile wireless networks. Nonetheless, static network models cannot capture the time-varying aspects and, therefore, various temporal metrics have been...journal article 2012