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Vertongen, J. (author), Kamper, Derek G. (author), Smit, G. (author), Vallery, H. (author)The large interest in robot hands and active hand prostheses has in recent years been joined by that in active hand orthoses. Despite the differences in intended uses, these three categories of artificial hand devices share key characteristics. Examination of the commonalities could stimulate future design. Thus, in this article, we undertook...journal article 2020
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Bodlaender, Hans L. (author), van Dobben de Bruyn, J. (author), Gijswijt, Dion (author), Smit, Harry (author)In this paper, we give a constructive proof of the fact that the treewidth of a graph is at most its divisorial gonality. The proof gives a polynomial time algorithm to construct a tree decomposition of width at most k, when an effective divisor of degree k that reaches all vertices is given. We also give a similar result for two related...conference paper 2020
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Smit, H. (author)This dissertation examines Nile water security through the morphology of the river. Water projects are often legitimized by arguing that they will increase the reliability of water or increase its availability for abstract populations. Such analyses often leave unexplained who specifically benefit from these projects and, more so, who do not....doctoral thesis 2019
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Purnomoadi, A.P. (author), Mor, A. R. (author), Smit, J.J. (author)This article contains the development of the Health Index (HI) and the Risk Assessment (RA) models for Gas Insulated Switchgear (GIS) operating under tropical conditions. A case study of 631 bays of GIS in tropics with service time from 1 up to 30 years is used during the development of the models. The basis for the HI model is the condition...journal article 2019
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Wu, J. (author), Mor, A. R. (author), van Nes, P.V.M. (author), Smit, J.J. (author)A partial discharge (PD) measuring system has been deployed in order to identify and measure PD in a high voltage (HV) cable joint under impulse and superimposed voltages under laboratory conditions. The challenge is to enable the detection of PD during the impulse conditions. The method of measurement has been investigated by introducing an...journal article 2019
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Culmone, C. (author), Smit, G. (author), Breedveld, P. (author)Goal: Additive manufacturing, also known as 3D printing, has begun to play a significant role in the field of medical devices. This review aims to provide a comprehensive overview and classification of additively manufactured medical instruments for diagnostics and surgery by identifying medical and technical aspects. Methods: A scientific...review 2019
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Henselmans, P.W.J. (author), Smit, G. (author), Breedveld, P. (author)One of the most prominent drivers in the development of surgical procedures is the will to reduce their invasiveness, attested by minimally invasive surgery being the gold standards in many surgical procedures and natural orifices transluminal endoscopic surgery gaining acceptance. A logical next step in this pursuit is the introduction of...journal article 2019
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Cuellar Lopez, J.S. (author), Smit, G. (author), Breedveld, P. (author), Zadpoor, A.A. (author), Plettenburg, D.H. (author)In developing countries, the access of amputees to prosthetic devices is very limited. In a way to increase accessibility of prosthetic hands, we have recently developed a new approach for the design and 3D printing of non-assembly active hand prostheses using inexpensive 3D printers working on the basis of material extrusion technology. This...journal article 2019
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Niekus, Marcel J. L. Th. (author), Kozowyk, Paul R. B. (author), Langejans, G.H.J. (author), Ngan-Tillard, D.J.M. (author), van Keulen, Henk (author), van der Plicht, Johannes (author), Cohen, Kim M. (author), van Os, Bertil (author), Smit, Bjørn I. (author)We report the discovery of a 50,000-y-old birch tar-hafted flint tool found off the present-day coastline of The Netherlands. The production of adhesives and multicomponent tools is considered complex technology and has a prominent place in discussions about the evolution of human behavior. This find provides evidence on the technological...journal article 2019
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Safai, Lauren (author), Cuellar Lopez, J.S. (author), Smit, G. (author), Zadpoor, A.A. (author)As additive manufacturing of polymeric materials is becoming more prevalent throughout industry and research communities, it is important to ensure that 3D printed parts are able to withstand mechanical and environmental stresses that occur when in use, including the sub-critical cyclic loads that could result in fatigue crack propagation and...review 2019
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Wu, J. (author), Mor, A. R. (author), Smit, J.J. (author)In practice, cross-linked polyethylene (XLPE) power cables can be subjected to alternating voltage with superimposed impulse transients. Such impulse transients may initiate partial discharges (PD) in insulation defects even below AC inception voltage. An initiated PD may persist under AC, which will cause insulation degradation. This paper...journal article 2019
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Tang, J. (author), Smit, Michiel (author), Vincent-Bonnieu, S.Y.F. (author), Rossen, W.R. (author)A new capillary number (N <sub>ca</sub> ) definition is proposed for 2-D etched micromodels. We derive the new definition from a force balance on a nonwetting ganglion trapped by capillarity. It incorporates the impact of pore microstructure on mobilization. The geometrical factors introduced can be estimated directly from image analysis of...journal article 2019
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Purnomoadi, A.P. (author), Mor, A. R. (author), Smit, J.J. (author)Humid insulating gas (SF6) has been observed in a case study of 631 CB-bays of Gas Insulated Switchgear (GIS) operating under tropical conditions. The routine gas quality check in the case study reported that 20% of the non-Circuit Breaker enclosures have humidity above the value recommended by the IEEE and IEC standards. Therefore, an...journal article 2019
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Oliveira, Bruna R F (author), Smit, Martijn P J (author), Veld, Harry (author), van Paassen, L.A. (author), Rijnaarts, Huub H M (author), Grotenhuis, Tim C. (author)Land subsidence in low-lying peatlands can be caused by shrinkage and organic matter oxidation. When these areas have networks of ditches and canals for drainage purposes, the sediments that accumulate in the waterways can be used to reverse the process of land subsidence. The objective of this study is to understand how dredged sediments can...journal article 2018
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Hermans, F.F.J. (author), Swidan, A.A.S. (author), Aivaloglou, E.A. (author), Smit, M.I.E. (author)When teaching novices programming, misconceptions can occur. Misconception are incorrect beliefs about certain programming concept. For example, some novices think that a variable can hold multiple values, in the case of two consecutive assignment statements, such as x = 5; x = 7. While explaining variables introductory materials often use...conference paper 2018
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Cuellar Lopez, J.S. (author), Smit, G. (author), Plettenburg, D.H. (author), Zadpoor, A.A. (author)Fabrication of complex and multi-articulated mechanisms is often seen as a time consuming and demanding process. The development of functional multi-articulated mechanisms that could be fabricated in a single step without the need for post-manufacturing assembly is therefore very attractive. Additive manufacturing (AM) has been pointed out as...review 2018
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Sakes, A. (author), Snaar, Kevin (author), Smit, G. (author), Witkamp, Arjen J. (author), Breedveld, P. (author)Background. The majority of the benign and malignant lesions in the breast arise from the ductal epithelium and terminal ductlobular unit. A minimally invasive procedure called ductoscopy is able to visualize these lesions as it inspects the ductal epithelium using a small micro-endoscope. Unfortunately, it is currently challenging to obtain...journal article 2018
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Cuellar Lopez, J.S. (author), Smit, G. (author), Zadpoor, A.A. (author), Breedveld, P. (author)In developing countries, prosthetic workshops are limited, difficult to reach, or even non-existent. Especially, fabrication of active, multi-articulated, and personalized hand prosthetic devices is often seen as a time-consuming and demanding process. An active prosthetic hand made through the fused deposition modelling technology and fully...journal article 2018
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Sakes, A. (author), Hovland, Kevin (author), Smit, G. (author), Geraedts, Jo M.P. (author), Breedveld, P. (author)In current bipolar electrosurgical instruments, a high frequency electrical sinusoidal wave is passed through the patient's body from an active electrode to the return electrode to cut, coagulate, or desiccate tissues. Even though current bipolar electrosurgical instruments have proven effective in minimizing blood loss, advancement is needed...journal article 2018
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Kuperus, J.S. (author), Smit, E.J.M. (author), Pouran, B. (author), van Hamersvelt, R.W. (author), van Stralen, Marijn (author), Seevinck, P.R. (author), Buckens, C.F. (author), Bleys, Ronald L.A.W. (author), Weinans, Harrie (author), Oner, F. C. (author), de Jong, P.A. (author), Verlaan, J-J (author)Diffuse idiopathic skeletal hyperostosis (DISH) is often theorized to be an ossification of the anterior longitudinal ligament (ALL). Using computed tomography (CT) imaging and cryomacrotome sectioning, we investigated the spatial relationship between the ALL and newly formed bone in DISH to test this hypothesis. In the current study, four...journal article 2018