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van der Ven, Roald (author)Storm surges cause elevated water levels, potentially leading to dune erosion, which is crucial to understand due to the protective function of dunes and sandy coastal defences against flooding. Dunes are dynamic systems, extensively studied through flumes and field observations. Collecting hydrodynamic and morphological data from erosion-prone...master thesis 2023
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van den Heuvel, Gaia (author)Children with cerebral palsy (CP) commonly have bony deformities of the foot, which lead to pain and gait problems. One of the causes of such a deformity is an imbalance in muscle forces around the foot. In turn, the bony deformity can also alter muscle function, due to, for example, altered muscle moment arm lengths. In this study, the altered...master thesis 2023
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Li, Z. (author), Liu, Haoyuan (author), Hicks, M.A. (author), Pisano, F. (author)Offshore monopile foundations are exposed to misaligned wind and wave loadings, which are respectively dominated by (nearly) static and cyclic load components. While the response of these systems to unidirectional cyclic loading has been extensively investigated, only a few studies have been devoted to the realistic case of misaligned static...journal article 2023
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Datsiou, Kyriaki Corinna (author), Overend, M. (author)Patterned acid-etched glasses are frequently used in horizontal glass surfaces that may be walked on, such as floors and staircase treads. These glasses provide useful antislip properties, but the foot traffic cause contact stresses and ageing mechanisms that are poorly understood and can affect the strength of the acid-etched glass. This...journal article 2023
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Waterval, N.F.J. (author), Brehm, M. A. (author), Harlaar, J. (author), Nollet, F. (author)Background: In individuals with unilateral plantar flexor weakness, the second peak of the vertical ground reaction force (GRF) is decreased. This leads to a higher ground reaction force, e.g. impact, of the contralateral leg, potentially explaining quadriceps muscle and/or knee joint pain. Energy cost optimized dorsal leaf ankle-foot...journal article 2022
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Ding, J. (author), Han, Linyan (author), Ge, Ligang (author), Liu, Yizhang (author), Pang, Jianxin (author)Robust locomotion is a challenging task for humanoid robots, especially when considering dynamic disturbances. This article proposes a disturbance observer-based cascaded model predictive control (MPC) approach for bipedal locomotion, with the capability of exploiting ankle, stepping, hip and height variation strategies. Specifically, based...journal article 2022
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McCahill, Jennifer (author), Stebbins, Julie (author), Prescott, Robin J. (author), Harlaar, J. (author), Theologis, Tim (author)Background: The Foot Profile Score (FPS) is a single score that summarises foot posture and dynamic foot motion during the gait cycle based on the kinematic data of the Oxford Foot Model. The FPS enables clinicians and researchers to quantify foot abnormalities during gait, to monitor change in foot/ankle motion over time, and to measure the...journal article 2022
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Urbanus, Francine C.A. (author), Grayson, Jane (author), Harlaar, J. (author), Simic, Milena (author)Load modifying gait retraining strategies, such as changing the foot progression angle (FPA) to toe-in and toe-out gait, are used for people with medial knee osteoarthritis. The FPA can be measured using a pressure sensitive walkway (PSW), but inertial measurement units (IMUs) are considered more suitable for clinical use. This study...journal article 2022
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Schallig, Wouter (author), van den Noort, Josien C. (author), Piening, Marjolein (author), Streekstra, Geert J. (author), Maas, Mario (author), van der Krogt, Marjolein M. (author), Harlaar, J. (author)Background: Foot and ankle joint kinematics are measured during clinical gait analyses with marker-based multi-segment foot models. To improve on existing models, measurement errors due to soft tissue artifacts (STAs) and marker misplacements should be reduced. Therefore, the aim of this study is to define a clinically informed, universally...journal article 2022
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Li, Yajun (author), Li, Jianguang (author), Xu, Nengxiong (author), Fenton, Gordon A. (author), Vardon, P.J. (author), Hicks, M.A. (author)Correlation length or scale of fluctuation (SOF) is often used as a primary parameter in defining the spatial correlation characteristics of varying soil properties. However, geotechnical site investigations are rather limited so that proper determination of correlation length is not always possible. The concept of a worst-case correlation...journal article 2022
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Vasileiou, Christos (author)Tendon-driven soft exosuits have gained much attention in recent years due to their ability to support people with mobility problems during daily life activities. A task that is particularly assisted by such robotic systems, due to its challenging nature, is stair climbing. However, assisting foot clearance during the swing phase of stair...master thesis 2021
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Kwa, F.S.S. (author)This thesis describes the design and development of an accurate and low cost 4D foot scanner in the context of podiatry. The intention is to make a first step towards the development of an affordable 4D foot scanner with commercial grade performance at a low cost, using commodity hardware. By doing so, 4D scanning can hopefully become more...master thesis 2021
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Deken, Jeffrey (author)Background: The development of ankle-foot orthoses (AFOs) have come a long way over the past decade. However, most improvements are mainly focused on gait performance. Hereby, other tasks are overlooked. This is also stated by AFO- users. AFO-users want an AFO that can be adjusted to suit dierent tasks. An adjustable AFO...master thesis 2021
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Klevering, Stijn (author)Tele-impedance can increase interaction perfor- mance between a robotic tool and unstructured/unpredictable environment during teleoperation. However, the existing tele- impedance interfaces have several ongoing issues, such as long calibration times and various obstructions for the human oper- ator. In addition, they are all designed to be...master thesis 2021
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Kiss, Bernadett (author)Various neuromuscular disorders such as spinal cord injury, Charcot-Marie-Tooth disease and poliomyelitis lead to calf muscle weakness, which limits the patient's ability to propel their body forward during gait. Their abnormal gait pattern is characterized by increased ankle dorsiflexion, excessive knee flexion during stance and reduced ankle...master thesis 2021
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Liu, H. (author), Kementzetzidis, E. (author), Abell, J. A. (author), Pisano, F. (author)Serviceability criteria for offshore monopiles include the estimation of long-term, permanent tilt under repeated operational loads. In the lack of well-established analysis methods, experimental and numerical research has been carried out in the last decade to support the fundamental understanding of monopile-soil interaction mechanisms, and...journal article 2021
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McCahill, Jennifer (author), Schallig, Wouter (author), Stebbins, Julie (author), Prescott, Robin (author), Theologis, Tim (author), Harlaar, J. (author)Introduction: In three-dimensional gait analysis, anatomical axes are defined by and therefore sensitive to marker placement. Previous analysis of the Oxford Foot Model (OFM) has suggested that the axes of the hindfoot are most sensitive to marker placement on the posterior aspect of the heel. Since other multi-segment foot models also use a...journal article 2021
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Gavin, Kenneth (author), Igoe, David (author)The design of axially loaded piles has been an area of focus for the offshore industry in recent years. A number of studies report substantial increases in the shaft capacity of piles driven in sand, known as pile ageing. The offshore industry has been slow to implement ageing into practice because of uncertainty over the mechanisms...journal article 2021
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Wouda, Frank J. (author), Jaspar, Stephan L.J.O. (author), Harlaar, J. (author), van Beijnum, Bert Jan F. (author), Veltink, Peter H. (author)Background: The foot progression angle is an important measure used to help patients reduce their knee adduction moment. Current measurement systems are either lab-bounded or do not function in all environments (e.g., magnetically distorted). This work proposes a novel approach to estimate foot progression angle using a single foot-worn...journal article 2021
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Schallig, Wouter (author), Streekstra, Geert J. (author), Hulshof, Chantal M. (author), Kleipool, Roeland P. (author), Dobbe, Johannes G.G. (author), Maas, Mario (author), Harlaar, J. (author), van der Krogt, Marjolein M. (author), van den Noort, Josien C. (author)Movement of skin markers with respect to their underlying bone (i.e. soft tissue artifacts (STAs)) might corrupt the accuracy of marker-based movement analyses. This study aims to quantify STAs in 3D for foot markers and their effect on multi-segment foot kinematics as calculated by the Oxford and Rizzoli Foot Models (OFM, RFM). Fifteen...journal article 2021