Searched for: department%3A%22Biomechanical%255C%252BEngineering%22
(601 - 620 of 743)
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Van Buul, G. (author), Kotek, G. (author), Wielopolski, P.A. (author), Farrell, E. (author), Bos, P.K. (author), Weinans, H. (author), Grohnert, A.U. (author), Jahr, H. (author), Verhaar, J.A.N. (author), Krestin, G.P. (author), Van Osch, G.J.V.M. (author), Bernsen, M.R. (author)Background: Articular cartilage has very limited intrinsic regenerative capacity, making cell-based therapy a tempting approach for cartilage repair. Cell tracking can be a major step towards unraveling and improving the repair process of these therapies. We studied superparamagnetic iron oxides (SPIO) for labeling human bone marrow-derived...journal article 2011
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Mooijweer, R. (author)Ergonomic problems of surgical lighting systems have been indicated by surgeons; however, the underlying causes are not clear. The aim of this dissertation is to assess the problems in detail, and subsequently clarify the underlying causes. In the first stage of the research, the observation method was used to quantify the luminaire use during...master thesis 2011
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Van de Ruit, M.L. (author)Assessing mechanisms of peripheral reflex control is important for understanding movement disorders after suprapsinal nerve lesions like stroke. In the present study, reflex provocation by ramp and hold rotations (R&H) was combined with Transcranial Magnetic Stimulation (TMS). In four subjects, subthreshold single pulses TMS were applied to the...master thesis 2011
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Meijneke, C. (author), Kragten, G.A. (author), Wisse, M. (author)The Delft Hand 2 (DH-2) is an underactuated robot hand meant for industrial applications, having six degrees of freedom (DoF), one actuator (DoA) and no sensors. It was designed to provide a cheap and robust hand to grasp a large range of objects without damaging them. The goal of this paper is to assess the design and performance of the DH-2,...journal article 2011
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Van Osch, F.J.C. (author)Static balancing is a useful concept to reduce operating effort in mechanisms. A statically balanced system which is designed to counterbalance a mass, is referred to as a gravity equilibrator. The potential energy in a gravity equilibrator is constant, which in most of the times is achieved by mechanical springs. Often helical springs are used,...master thesis 2011
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Trommelen, M.H.T. (author)When performing minimally invasive interventions, surgeons use grippers to grip and manipulate tissue. These grippers generally rely on their toothed profile and require pinching of the tissue for sufficient grip, entailing a risk of tissue damage. An solution should be found for this risk of damage. An alternative could be to manipulate the...master thesis 2011
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Boessenkool, H. (author)An tele-operation, haptic feedback from the remote environment to the human is often limited, which has been shown to negatively influence the performance and required time of tasks. The conventional research focus is on improving the quality of the haptic feedback (transparency), which may have led to significant improvement, but is still...master thesis 2011
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Pape, R. (author)The concept of underactuation is increasingly applied to hand prostheses because it minimizes the number of actuators while the fingers are adaptive to the grasped objects. However, current underactuated grasp mechanisms suffer from an intrinsic stability problem which disables them to obtain a pinch grasp, hence they fail to grasp small objects...master thesis 2011
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Wisse, M. (author), Wilbers, F. (author), Meijneke, C. (author)Artificial hand (1) suitable for robotic applications or as a prosthesis, comprising a frame (2) with a thumb (3) and at least two fingers (4,5), and having a motor drive (6) for adjusting the thumb and the fingers with respect to the frame, wherein the motor drive has a housing (7) and an axle (8) which is rotatably positioned within the...patent 2011
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- Birglen, L. (author), Kragten, C.A. (author), Herder, J.L. (author) journal article 2010
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Kragten, G.A. (author), Meijneke, C. (author), Herder, J.L. (author)There is a lack of agreement in the literature as to what exactly quantifies the performance of underactuated hands. This paper proposes two benchmark tests to measure the ability of underactuated hands to grasp different objects and the ability to hold the objects when force disturbances apply. The first test determines the smallest and largest...journal article 2010
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Herder, J.L. (author), Barrari, A. (author), Tolou, N. (author)Yet another journal? And what is the windmill about? Those are two questions that we heard a lot lately. Yes, another journal, or rather, a different journal, called Mechanical Sciences (MS). The main difference is that the journal is open access, of which there are not many in the field of mechanical sciences. Grant agencies more and more...journal article 2010
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Voigt, G.L. (author)Background: Incidents with medical equipment have been observed by several studies [6, 4], and the lack of proper training has been identified as one of the main reasons for the occurrence of these errors . Providing proper training is costly and logistically problematic for hospitals. Simulations can successfully resolve some of these problems,...master thesis 2010
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Hichert, M. (author)High rejection rates indicate that prosthetic users are not satisfied with the performance of their arm prostheses. In theory, one of the advantages of shoulder controlled prosthesis, compared to myo-electric prostheses, is that the user gets direct proprioceptive feedback about opening width and pinch force of his prosthetic hand. However,...master thesis 2010
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Meskers, A.J.H. (author)This thesis describes the research for, and the assessment of a new type of energy source and actuation, applicable to a Micro Aerial Vehicle (MAV). From the preliminary study resulted a promising energy source: hydrogen peroxide (H2O2) which is combined with the basic principle of the internal combustion engine for conversion to mechanical...master thesis 2010
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Wijsman, F. (author)In active, toddler sized hand prostheses the cosmetic glove introduces a stiffness which causes the required operation forces to be too high to be generated by toddlers. The Wilmer WHD-4 was measured with 3 different cosmetic gloves. Despite using gloves of identical size and brand, different glove stiffness characteristic curves were measured....master thesis 2010
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Herder, J.L. (author), Van der Wijk, V. (author)The invention relates to a delta robot comprising a stationary base (2) and a movable platform (3) that is connected to the base with three chains of links (4,5,6), and comprising a balancing system incorporating at least one pantograph (7) for balancing the robot's center of mass, wherein the at least one pantograph has a first free extremity ...patent 2010
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- Veeger, H.E.J. (author) public lecture 2010
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Van Vliet, B. (author)Learning a motor skill task with Reinforcement Learning still takes a long time. A way to speed up the learning process with- out using much prior knowledge is to use sub-goals. In this study, the use of subgoals decreased the learning time by a factor nine and we show that tests on a real robot give similar results. The price to be paid, in...master thesis 2010
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Schuitema, E. (author), Caarls, W. (author), Wisse, M. (author), Jonker, P.P. (author), Babuska, R. (author)Reinforcement Learning is a promising paradigm for adding learning capabilities to humanoid robots. One of the difficulties of the real world is the presence of disturbances. In Reinforcement Learning, disturbances are typically dealt with stochastically. However, large and infrequent disturbances do not fit well in this framework; essentially,...conference paper 2010
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