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Chan, D.W.M. (author), Chan, J.H.L. (author), Lam, P.T.I. (author), Chan, A.P.C. (author)A scarcity of empirical research has been observed on risk mitigation measures for those construction projects procured by guaranteed maximum price contracts (GMP) and target cost contracts (TCC) worldwide. This paper aims to seek and examine the risk mitigation measures associated with GMP and TCC (GMP/TCC) construction projects through an...conference paper 2011
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Kulejewski, J. (author)This paper regards to the scheduling of a construction project under ill-defined constraints of time and resources for the execution of works. Fuzzy numbers are used for modelling the imprecision of constraints. Two methods of the measurement of fuzzy constraints satisfaction are presented. The first method uses the possibility measures based...conference paper 2011
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Ren, Y. (author), Hovenier, J.N. (author), Higgins, R. (author), Gao, J.R. (author), Klapwijk, T.M. (author), Shi, S.C. (author), Klein, B. (author), Kao, T.Y. (author), Hu, Q. (author), Reno, J.L. (author)A frequency tunable terahertz heterodyne spectrometer, based on a third-order distributed feedback quantum cascade laser as a local oscillator, has been demonstrated by measuring molecular spectral lines of methanol (CH3OH) gas at 3.5 THz. By varying the bias voltage of the laser, we achieved a tuning range of ? 1?GHz of the lasing frequency,...journal article 2011
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Dodds, P.G. (author), De Pagter, B. (author)It is shown that order continuity of the norm and weak sequential completeness in non-commutative strongly symmetric spaces of ? -measurable operators are respectively equivalent to properties (u) and (V?) of Pelczynski. In addition, it is shown that each strongly symmetric space with separable (Banach) bidual is necessarily reflexive. These...journal article 2011
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Van der Kooij, H. (author), Campbell, A.D. (author), Carpenter, M.G. (author)The different measures used to characterize postural sway are sensitive to variations in sampling duration, yet there remains marked variability and a lack of consistency in this temporal parameter when compared between studies. We investigated the effect of sampling duration on 22 commonly used frequency and time domain measures and stabilogram...journal article 2011
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Van Langelaar, C.M. (author)We all have walked on a street when suddenly someone comes over to you asking for directions. Sometimes, people do not know where they are and they do not know how to reach their destination. They are lost. However, people should not depend on others to find their way. The urban fabric should be legible enough to find one’s way. The problem...master thesis 2011
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Erbrink, J.J. (author)High-voltage transformers have tap changers to regulate the voltage in the high-voltage network when the load changes. Those tap changers are subject to different degradation mechanisms and need regular maintenance. Various defects, like contact degradation, often remain undetected and the probability of maintenance errors cannot be neglected....doctoral thesis 2011
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Poortman, S.E. (author)This project focuses on studying and modelling the flow in the sailing area of the 2012 Olympic Sailing Competition, located partly in Portland Harbour and partly in Weymouth Bay, in order to provide accurate and reliable current forecasts for the Dutch Olympic Sailing Team. From literature it follows that the main flow in the area is the tidal...master thesis 2011
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Cui, M. (author), Zeitouny, M.G. (author), Bhattacharya, N. (author), Van den Berg, S.A. (author), Urbach, H.P. (author)We experimentally demonstrate long distance measurements with a femtosecond frequency comb laser using dispersive interferometry. The distance is derived from the unwrapped spectral phase of the dispersed interferometer output and the repetition frequency of the laser. For an interferometer length of 50 m this approach has been compared to an...journal article 2011
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Mizutani, Y. (author), Groves, R.M. (author)This paper describes the measurement of average strain, strain distribution and vibration of a cantilever beam made of Carbon Fiber Reinforced Plastics (CFRP), using a single Fibre Bragg Grating (FBG) sensor mounted on the beam surface. Average strain is determined from the displacement of the peak wavelength of reflected spectrum from the FBG...journal article 2011
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Demi, L. (author), Van Dongen, K.W.A. (author), Verweij, M.D. (author)Experimental data reveals that attenuation is an important phenomenon in medical ultrasound. Attenuation is particularly important for medical applications based on nonlinear acoustics, since higher harmonics experience higher attenuation than the fundamental. Here, a method is presented to accurately solve the wave equation for nonlinear...journal article 2011
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Liberal, I. (author), Caratelli, D. (author), Yarovoy, A. (author)The design and full-wave analysis of an antenna system for ultra-wideband radio direction finding applications is presented. The elliptical dipole antenna is selected as antenna element due to its robust circuital and radiation properties. The influence of the conformal deformation on the antenna performance has been studied in details. A...journal article 2011
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Van Dalen, K.N. (author)The characterization of porous materials (e.g., sandstone) is very important for geotechnical and reservoir engineers. For this purpose, often use is made of acoustic waves that are sent through the medium. The desired material parameters can then be estimated from the measured signals. However, often only the velocity or the attenuation of the...doctoral thesis 2011
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Zhou, J. (author), Jacobsson, M. (author), Onur, E. (author), Niemegeers, I. (author)Wireless ad hoc networks will be an important component in future communication systems. The performance of wireless ad hoc networks can be improved by link quality-aware applications. Wireless link quality is dynamic in nature, especially in mobile scenarios. Therefore, accurate and fast packet delivery ratio estimation is a prerequisite to...journal article 2011
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- Kleerekoper, L. (author) conference paper 2011
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Miete, O.M. (author)In hydraulic engineering it is known that for the evaluation of the performance of a system, a probabilistic approach is preferable to a deterministic one. The essence of such a probabilistic approach is that random variability/uncertainty is explicitly taken into account. In this graduation project, this probabilistic way of looking at a system...master thesis 2011
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Stam, J. (author)With the advent of Unmanned Aerial Vehicles, it becomes possible to use these vehicles to acquire photogrammetric images in a more cheap and flexible way compared with conventional photogrammetry from a full-sized airplane. A big factor in costs and resources in conventional photogrammetry is signalling and measuring ground control points, which...master thesis 2011
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Kroesen, M. (author), Schreckenberg, D. (author)In this paper a measurement model for general noise reaction (GNR) in response to aircraft noise is developed to assess the performance of aircraft noise annoyance and a direct measure of general reaction as indicators of this concept. For this purpose GNR is conceptualized as a superordinate latent construct underlying particular manifestations...journal article 2011
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Goto, D.T. (author), Groves, R.M. (author)This paper describes the development of an opto-mechanical simulation of a complete shearography system, including the shearography instrument, the samples and the test environment. This simulation is applied to the measurement of 3D strains in engineering samples. The samples are a cylinder loaded by internal pressure and a flat plate under...conference paper 2010
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Dijkstra, J.T. (author), Uittenbogaard, R.E. (author)Aquatic vegetation has an important role in estuaries and rivers by acting as bed stabilizer, filter, food source and nursing area. However, macrophyte populations worldwide are under high anthropogenic pressure. Protection and restoration efforts will benefit from more insight into the interaction between vegetation, currents, waves and...journal article 2010