Searched for: subject:"Biomechanical"
(1 - 20 of 103)

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de Vries, A.W. (author), de Looze, M.P. (author), Krause, F. (author)
Positive effects of arm support exoskeletons in reducing the shoulder load, have been reported mainly from laboratory studies. However, for exoskeletons to provide worker support in practice, they need to be accepted as well. Therefore, it is necessary to obtain insight into the user experience and attitude towards exoskeleton use, in relevant...
bookPart 2022
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Brouwer, N.P. (author), Tabasi, A. (author), Moya-Esteban, A. (author), Sartori, M. (author), van Dijk, W. (author), Kingma, I. (author), van Dieen, J.H. (author)
The effectiveness of exoskeletons could be enhanced by incorporating low back muscle fatigue estimates in their control. The aim of the present study was to evaluate whether low back muscle fatigue can be estimated using the spectral content of trunk extensor muscle high-density EMG (HDEMG) by considering the motor unit action potential...
bookPart 2022
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Tabasi, A. (author), Lazzaroi, M. (author), Brouwer, N.P. (author), Kingma, I. (author), van Dijk, W. (author), de Looze, M.P. (author), Toxiri, S. (author), Ortiz, J. (author), van Dieen, J.H. (author)
Estimation of low-back load can be used to determine the assistance to be provided by an actuated back-support exoskeleton. To this end, an EMG-driven muscle model and a regression model can be implemented. The goal of the regression model is to reduce the number of required sensors for load estimation. Both models need to be calibrated. This...
bookPart 2022
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Kingma, B.R.M. (author), Koopmans, A.S. (author), de Looze, M.P. (author), van Dieen, J.H. (author)
To evaluate the biomechanical effect of exoskeletons during lifting, three studies were performed to compare spine compression during lifting without and with three exoskeletons (Laevo, Robo-Mate, SPEXOR). In these studies, participants (11, 10 and 10, respectively) lifted boxes (10, 15 and 10 kg, respectively) from ankle height. Spine...
bookPart 2022
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Koopman, A.S. (author), Naf, M. (author), Baltrusch, S.J. (author), Kingma, I. (author), Rodriguez-Guerrero, C. (author), Babic, J. (author), de Looze, M.P. (author), van Dieën, J.H. (author)
The number one cause of disability in the world is low-back pain, with mechanical loading as one of the major risk factors. To reduce mechanical loading, exoskeletons have been introduced in the workplace. Substantial reductions in back muscle activity were found when using the exoskeleton during static bending and manual materials handling....
article 2020
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Fu, W. (author), Landman, H.M. (author), van Paassen, M.M. (author), Mulder, M. (author)
We discuss an extension of the basic principles underlying the human haptic just noticeable difference (JND) in perceiving a manipulator's mechanical properties from force feedback. Two cases are studied: 1) the JND in perceiving the stiffness of manipulators with various masses; 2) the JND in perceiving the damping of a combined mass-spring...
article 2018
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Willems, N.M.B.K. (author), Langenbach, G.E.J. (author), Stoop, R. (author), den Toonder, J.M.J. (author), Mulder, L. (author), Zentner, A. (author), Everts, V. (author)
The role of mature collagen cross-links, pentosidine (Pen) cross-links in particular, in the micromechanical properties of cancellous bone is unknown. The aim of this study was to examine nonenzymatic glycation effects on tissue stiffness of demineralized and non-demineralized cancellous bone. A total of 60 bone samples were derived from...
article 2014
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Mann, R. (author), Malisoux, L. (author), Brunner, R. (author), Gette, P. (author), Urhausen, A. (author), Statham, A. (author), Meijer, K. (author), Theisen, D. (author), TNO Technical Sciences (author)
Running biomechanics has received increasing interest in recent literature on running-related injuries, calling for new, portable methods for large-scale measurements. Our aims were to define running strike pattern based on output of a new pressure-sensitive measurement device, the Runalyser, and to test its validity regarding temporal...
article 2014
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Perez, J. (author), de Looze, M.P. (author), Bosch, T. (author), Neumann, W.P. (author)
This methodological paper presents a novel approach to predict operator's mechanical exposure and fatigue accumulation in discrete event simulations. A biomechanical model of work-cycle loading is combined with a discrete event simulation model which provides work cycle patterns over the shift resulting in a load-time trace for the entire shift....
article 2014
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Eijckelhof, B.H.W. (author), Bruno Garza, J.L. (author), Huysmans, M.A. (author), Blatter, B.M. (author), Johnson, P.W. (author), van Dieën, J.H. (author), van der Beek, A.J. (author), Dennerlein, J.T. (author)
Objective Office workers with high levels of overcommitment and low levels of reward are thought to be more prone to arm-wrist-hand symptoms, possibly through a higher internal physical exposure. The aim of this study was to examine the effects of high overcommitment and low reward on (i) forearm muscle activity, (ii) wrist posture and...
article 2013
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van Rooij, L. (author), Elrofai, H.B.H. (author), Philippens, M.M.G.M. (author), Daanen, H.A.M. (author)
It is important to understand human kinematics and muscle activation patterns in emergency maneuvers for the design of safety systems and for the further development of human models. The objective of this study was to quantify kinematic behavior and muscle activation in simulated steering tests in several realistic conditions. In total 108 tests...
article 2013
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Botter, J. (author), Burford, E.M. (author), Commissaris, D. (author), Könemann, R. (author), Mastrigt, S.H.V. (author), Ellegast, R.P. (author)
The aim of this research paper was to investigate the effect, both biomechanically and physiologically, of two dynamic workstations currently available on the commercial market. The dynamic workstations tested, namely the Treadmill Desk by LifeSpan and the LifeBalance Station by RightAngle, were compared to the more conventional seated and...
conference paper 2013
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Vink, P. (author), Hallbeck, S. (author)
The term comfort is often seen relating to the marketing of products like chairs, cars, clothing, hand tools and even airplane tickets, while in the scientific literature, the term discomfort shows up often, since it is used in research. Few papers explain the concept of a localized comfort experience in relation to product use, although people...
article 2012
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Groenesteijn, L. (author), Ellegast, R.P. (author), Keller, K. (author), Krause, F. (author), Berger, H. (author), de Looze, M.P. (author)
In the present study, we investigated the effect of office tasks on posture and movements in field settings, and the comfort rating for chair characteristics and correlation with type of task. The tasks studied were: computer work, telephoning, desk work and conversation. Postures, movements, chair part inclinations and comfort rating data were...
article 2012
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Garza, J.L.B. (author), Eijckelhof, B.H.W. (author), Johnson, P.W. (author), Raina, S.M. (author), Rynell, P.W. (author), Huysmans, M.A. (author), van Dieën, J.H. (author), van der Beek, A.J. (author), Blatter, B.M. (author), Dennerlein, J.T. (author)
This study, a part of the PRedicting Occupational biomechanics in OFfice workers (PROOF) study, investigated whether there are differences in field-measured forces, muscle efforts, postures, velocities and accelerations across computer activities. These parameters were measured continuously for 120 office workers performing their own work for...
article 2012
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Ellegast, R.P. (author), Kraft, K. (author), Groenesteijn, L. (author), Krause, F. (author), Berger, H. (author), Vink, P. (author)
Prolonged and static sitting postures provoke physical inactivity at VDU workplaces and are therefore discussed as risk factors for the musculoskeletal system. Manufacturers have designed specific dynamic office chairs featuring structural elements which promote dynamic sitting and therefore physical activity. The aim of the present study was to...
article 2012
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Zenk, R. (author), Franz, M. (author), Bubb, H. (author), Vink, P. (author)
For car manufacturers, seat comfort is becoming more important in distinguishing themselves from their competitors. Therefore, many studies on participative seat comfort are carried out. In this paper, an objective assessment approach is reported which evaluates the concept of "optimal load distribution", based on the identification of a close...
article 2012
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van Rooij, L. (author), Uittenbogaard, J. (author)
For the evaluation of impact scenarios with a substantial vertical component, the performance of current human surrogates - the RID 3D hardware dummy and two numerical human models - was evaluated. Volunteer tests with 10G and 6G pulses were compared to reconstructed tests with human surrogates. Additional scenarios were tested in order to...
conference paper 2011
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Coenen, P. (author), Kingma, I. (author), Boot, C.R.L. (author), Faber, G.S. (author), Xu, X. (author), Bongers, P.M. (author), van Dieën, J.H. (author)
This study aimed to develop, compare and validate two versions of a video analysis method for assessment of low back moments during occupational lifting tasks since for epidemiological studies and ergonomic practice relatively cheap and easily applicable methods to assess low back loads are needed. Ten healthy subjects participated in a protocol...
article 2011
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Nemirovsky, N. (author), van Rooij, L. (author), TNO Industrie en Techniek (author)
Active safety systems require accurate modelling of human behaviour. The effect of bracing, together with an appropriate human head/neck stability control are essential in the study of pre-crash behaviour and neck injury, since they can account for changes in apparent joint stiffness in the neck. In this paper a biofidelic postural control of...
conference paper 2010
Searched for: subject:"Biomechanical"
(1 - 20 of 103)

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