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Nagaki, K. (author)
Reinforcement learning (RL) is a machine learning technique whereby the controller learns the control law by optimizing the received cumulative amount of reward. A reward is an instantaneous evaluation of the applied action at the current state, given by reward function. However in theory the reward function is assumed to be given, in practice...
master thesis 2015
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Lensink, R.A. (author)
In multi-legged robots, such as the Zebro robot from TU Delft Robotics Institute, locomotion can be addressed as a Max-Plus Linear (MPL) system. In such MPL systems the gait is generated and controlled by abstracting the continuous motion of the legs to the occurrences of discrete touch-down and lift-off events, which are subsequently described...
master thesis 2015
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Majid, A.Y. (author)
master thesis 2015
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Allen, C.S. (author), Liberti, E. (author), Kim, J.S. (author), Xu, Q. (author), Fan, Y. (author), He, K. (author), Robertson, A.W. (author), Zandbergen, H.W. (author), Warner, J.H. (author), Kirkland, A.I. (author)
We have measured the mean square amplitude of both in- and out-of-plane lattice vibrations for mono-layer graphene at temperatures ranging from ?100 K to 1300?K. The amplitude of lattice vibrations was calculated from data extracted from selected area electron diffraction patterns recorded across a known temperature range with over 80...
journal article 2015
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Balk, S.P.P.J. (author)
The corporate learning and development [L&D] environment is currently changing and managers involved in corporate L&D are more and more requesting insight in the contribution of learning towards their business and feedback on how well the department is performing. To meet these business needs the objective of this study was to generate the...
master thesis 2015
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Hoogeveen, W.J. (author)
A visit to a gas station is currently often chaotic and full of annoyances and anxiety. The customer at the pump in front of you is taking forever getting a coffee inside the shop, all pumps on the right side of your car are taken or your hands are getting greasy because there are no more plastic gloves in the dispenser. These are just a few...
master thesis 2015
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Van den Boogaart, M.C. (author)
master thesis 2015
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Krusharev, I. (author)
The format and size specifications of the CubeSat platform require highly miniaturized subsystems, one of the most challenging ones being the propulsion system. Up to date, according to the authors' knowledge, only two CubeSats have successfully operated a propulsion system in space: CanX-2 in 2008 and Defil-n3Xt in 2013. The importance of a...
master thesis 2015
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Nati, A. (author), De Kat, R. (author), Scarano, F. (author), Van Oudheusden, B.W. (author)
The unsteady effect of a periodic pitching motion on the characteristic of a laminar separation bubble on the suction side of a SD7003 aerofoil is investigated by means of time-resolved planar and tomographic particle image velocimetry. The measurements provide information on the separation, transition and vortex roll-up onset as well as the...
journal article 2015
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Van der Meer, T.E. (author)
Concrete bridges are subjected to large lateral deformations, which if restrained will also lead to large (axial) stresses in the structure. If unrestrained these deformations caused by temperature variation and shrinkage, can become problematic for bridges of sufficient continuous length. If deformation is restrained to some degree, then the...
master thesis 2015
document
Poelma, C. (author)
To gain a better understanding of the role of haemodynamic forces during the development of the cardiovascular system, a series of studies have been reported recently that describe flow fields in the vasculature of model systems. Such data sets, in particular those reporting networks at multiple stages, mark a transition in the focus from single...
journal article 2015
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Jani Kedar, R. (author)
Solid waste Management has become severe issue in India. With burgeoning population, the urban utilities are crumbling under pressure of population explosion, lack of funding and political pressure. The focus of this thesis is on Solid Waste Management in city of Ahmedabad. The research investigates the potential solutions and policy packages...
master thesis 2015
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Groen, J.P. (author)
The ongoing demand for better performing designs, has resulted in an increase in the complexity of topology optimization problems. Traditionally, the majority of the corresponding computational cost comes from solving the analysis equations using linear finite elements (FE). In this thesis a topology optimization method is presented, that is...
master thesis 2015
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Fang, K. (author), Heijungs, R. (author), Duan, Z. (author), De Snoo, G.R. (author)
Growing scientific evidence for the indispensable role of environmental sustainability in sustainable development calls for appropriate frameworks and indicators for environmental sustainability assessment (ESA). In this paper, we operationalize and update the footprint-boundary ESA framework, with a particular focus on its methodological and...
journal article 2015
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Overweg, H.C. (author), Den Haan, A.M.J. (author), Eerkens, H.J. (author), Alkemade, P.F.A. (author), La Rooij, A.L. (author), Spreeuw, R.J.C. (author), Bossoni, L. (author), Oosterkamp, T.H. (author)
We investigate the degradation of the magnetic moment of a 300?nm thick FePt film induced by Focused Ion Beam (FIB) milling. A 1??m?×?8??m rod is milled out of a film by a FIB process and is attached to a cantilever by electron beam induced deposition. Its magnetic moment is determined by frequency-shift cantilever magnetometry. We find that the...
journal article 2015
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Wu, N. (author)
In the deep water S-lay installation, the buckle arrestor rolls on and drops off the rollers repeatedly when it moves along the stinger. When the buckle arrestor is located on the roller, there is strain intensification at the 12 o'clock position of the pipe section which is close to the buckle arrestor, and the strain can reach 1%. When the...
master thesis 2015
document
De Bokx, R. (author)
The recently introduced Linkage Tree Genetic Algorithm (LTGA) has shown to exhibit excellent scalability on a variety of optimization problems. LTGA employs Linkage Trees (LTs) to identify and exploit linkage information between problem variables. In this work we present two parallel implementations of LTGA that enable us to leverage the...
master thesis 2015
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Verheij, J. (author)
In this study seismic wave velocity and seismic wave attenuation in dry Bentheimer sandstone, Indiana limestone, and Whitby shale are studied while continuously deforming and therefore increasingly fracturing the rock samples up until macroscopic failure. A pulse transmission technique at a central frequency of 1 MHz is used in combination with...
master thesis 2015
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Rothkrantz, L. (author), Fitrianie, S. (author)
During major disaster events, human operators in a crisis center will be overloaded with a flood of phone calls. As an increasing number of people in and around big cities do not master the native language, the need for automated systems that automatically process the context and content of information about disaster situations from the...
conference paper 2015
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Primarini, M.I.W. (author)
The rapidly decreasing reserves of conventional gas has forced oil and gas industries to conduct more exploration on unconventional resources, like shale gas. To produce gas from shales in economically viable manner, stimulation techniques like hydraulic fracturing are required. One important factor for a successful hydraulic fracturing is...
master thesis 2015
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