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Vos, Amber (author)In this MSc thesis it is investigated how the first version of concrete armour unit Xbloc<sup>+</sup>, Xbloc<sup>+ v1</sup>, acquires its stability. The stability mechanisms are investigated by conducting two type of physical model tests. First, 23 dry pull-out tests are done to obtain insights into the aspects and mechanisms that influence the...master thesis 2017
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Bloem, Hugo (author)In the Westerwald area clay quarries are in production. In order to assess the stability of the slopes the geotechnical characterisation of these quarries needs to be improved. This report provides the justification for a working plan for a thorough but quick assessment of existing slopes in clay mines. Literature is consulted for the...bachelor thesis 2017
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Rada Mora, Belen (author)In recent years, the use of Xbloc units has increased exponentially. However, the placement of this unit is not always done as randomly as it should be and consequently, the stability of the armor is affected. In order to overcome this problem, Delta Marine Consultants is developing a new armor unit called Xbloc+ that has a regular placement. In...master thesis 2017
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Jongeling, Alexander (author)In the world of DC railway trains nowadays, asynchronous-traction machine with traction controllers, i.e. an inverter with variable output frequency, is implemented. This controller changes the incoming DC voltage into an AC voltage of a variable frequency and RMS amplitude. The disadvantages of switching inverters, compared to a pure sine wave...master thesis 2017
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Arrieta Ortubay, Xabi (author)Block mattresses are widely used bed protection elements under non-uniform flows. Previous studies show that the turbulence of the flow plays a key role on the instability of the mattress. However, in the available design equations, the turbulence intensity is included as a magnification factor roughly and qualitatively defined. Consequently,...master thesis 2017
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Klop, Wouter (author)A humanoid robot is being developed, intended to operate robustly in a typical day-to-day human environment. Its ability to react quickly to stochastic disturbances, especially its ability to avoid falling, termed stability in this context, is of prime importance. The choosing of a suitable actuator that affords such stability is seen as a...master thesis 2017
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De Jong, P.H. (author)The design of the ordinary bicycle has barely changed since the end of the 19th century. Until then it evolved to a well ridable machine with no need for further drastic modifications. However, around 2011 it was shown that, just like an ordinary bicycle, strange appearing designs could also be stable. One of these designs was a bicycle that...master thesis 2017
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Smyrnis, A. (author)Block mattresses or block mats are, nowadays, very commonly applied as protection in a large range of applications either against flow or wave loads. Specifically, this large range of applications contains offshore pipeline protection and stabilization, erosion and scour protection, protection of embankments and river banks (slope protection)....master thesis 2017
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Yang, L. (author), Li, Pengdeng (author), Yang, Xiaofan (author), Tang, Yuan Yan (author)Advanced persistent threats (APTs) pose a grave threat to cyberspace, because they deactivate all the conventional cyber defense mechanisms. This paper addresses the issue of evaluating the security of the cyber networks under APTs. For this purpose, a dynamic model capturing the APT-based cyber-attack-defense processes is proposed....journal article 2017
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Ma, M. (author), Herdeiro Teixeira, A.M. (author), van den Berg, Jan (author), Palensky, P. (author)Low-voltage distribution grids experience a rising penetration of inverter-based, distributed generation. In order to not only contribute to but also solve voltage problems, these inverters are increasingly asked to participate in intelligent grid controls. Communicating inverters implement distributed voltage droop controls. The impact of...journal article 2017
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van der Blij, N.H. (author), Ramirez Elizondo, L.M. (author), Spaan, M.T.J. (author), Bauer, P. (author)Instability caused by low inertia and constant power loads is a major challenge of DC distribution grids. Previous research uses oversimplified models or does not provide general rules for stability. Therefore, a comprehensive approach to analyze the stability of DC distribution systems is desired. This paper presents a method to algebraically...journal article 2017
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Beyhan, Selami (author), Eghbal Sarabi, F. (author), Lendek, Zsofia (author), Babuska, R. (author)In this paper, a novel adaptive Takagi-Sugeno (TS) fuzzy observer-based controller is proposed. The closed-loop stability and the boundedness of all the signals are proven by Lyapunov stability analysis. The proposed controller is applied to a flexible-transmission experimental setup. The performance for constant payload in the presence of...journal article 2017
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Vu, M.N. (author)Despite the fact that shallow tunnels have the benefits of low short-term construction costs and long-term operational costs primarily due to the shallow depth of the station boxes, the limited understanding of shallow tunnelling in soft soils is an obstacle to the development of shallow tunnels in urban areas. This study carries out a...doctoral thesis 2016
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Noordam, N.M. (author)Force feedback in helicopters can improve the performance of the pilot, decrease direct maintenance costs and increase the safety of every flight. Traditional force feedback is done with the use of a force sensor. In this thesis the use of a position based, feedforward control loop to achieve the same purpose is investigated. The limits of...master thesis 2016
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Purgat, P. (author)The flexible power transfer network is a conceptual transfer network for residential areas. The main advantage of the proposed concept is the increased safety and flexibility compared to currently used AC network. The core idea is to incorporate wireless power transfer into the network which leads to inherently safer and more flexible network...master thesis 2016
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Lee, M. (author)In order for Jumbo to stay competitive in the offshore market, it's heavy lift vessels should be able to take on a wide range of lifting purposes. This can range from installation of transition pieces for wind turbines to installing modules of fpso's and platforms. One of the demands from the offshore market requires large lifting heights. It is...master thesis 2016
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- Sullivan, P.P. (author), Weil, J.C. (author), Patton, E.G. (author), Jonker, H.J.J. (author), Mironov, D.V. (author) journal article 2016
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Hellinga, L.B. (author)Breakwaters with single layer concrete armour are very commonly applied nowadays. Much research is available on the stability of single layer armour units on the seaward slope. However, rear slopes design methods for single layer armour units are rare. On rear side slopes usually similar sized units as on the seaward slope are applied. Limited...master thesis 2016
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Xie, Jingxiu (author), Torres Galvis, Hirsa M. (author), Koeken, Ard C J (author), Kirilin, Alexey (author), Dugulan, A.I. (author), Ruitenbeek, Matthijs (author), de Jong, Krijn P. (author)The Fischer−Tropsch Synthesis converts synthesis gas from alternative carbon resources, including natural gas, coal, and biomass, to hydrocarbons used as fuels or chemicals. In particular, iron-based catalysts at elevated temperatures favor the selective production of C2−C4 olefins, which are important building blocks for the chemical industry....journal article 2016
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Reinders, K.J. (author), Schoenmaker, B. (author), Nohl, W.A. (author)New vertical steel storage tanks founded on a shallow foundation of a crushed rock ring are planned at the same location of former storage tanks. The dimensions, loads and foundation of the new tanks are identical to the old tanks which were erected 40 years ago and demolished a few years ago. Despite the fact that the new tanks are identical to...conference paper 2015