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Wyszukujesz frazę "Kim, S. S." wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Reaction Moment at the L5/S1 Joint During Simulated Forward Slipping With a Handheld Load
    Autorzy:
    Liu, J.
    Lockhart, T.
    Kim, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/89818.pdf
    Data publikacji:
    2014
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    back injury
    load carrying
    slips and falls
    reactive recovery
    obciążenie
    plecy
    poślizg
    Opis:
    The purpose of the study was to investigate the effects of load on the net moment response at the L5/S1 joint during simulated slip events. Six young individuals were instructed to take one step with a handheld load. Sudden floor movement was randomly introduced to simulate unexpected slips. Different loads conditions (0%, 10%, 20%, 30% of body weight) were introduced at random. Three-dimensional net moments at the L5/S1 joint were computed via downward inverse dynamic model. Peak joint moment generated at 30% load level was found to be significantly higher compared to no-load condition. No peak moment differences were found among no-load, 10% or 20% load levels. Additionally, the findings from this study indicated a flexiondominant net L5/S1 joint moment pattern during motion phase associated with slip-induced falls.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2014, 20, 3; 429-436
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two-Dimensional Automatic Control Modeling of a Posture Control System
    Autorzy:
    Park, K. S.
    Kim, U. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/90283.pdf
    Data publikacji:
    1998
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    posture control model
    posturography
    perturbation
    parameter identification
    model fitness
    stability
    predictability
    model kontroli
    postura
    posturografia
    identyfikacja parametrów
    fitness
    Opis:
    A posture control model has been developed on the basis of the 2-dimensional feedback control theory. Human postural characteristics were investigated in 5 healthy participants. Tests were performed with eyes open and eyes closed. After 5 s of quiet standing, each participant was unexpectedly pulled forward by 30 mm at his pelvis height and then released. Postural sway was measured over 20 s at a rate of 100 per second. Transfer functions to represent the posture control characteristic were identified by the least squares' method. These showed good results of the model's fitness, predictability, and stability. The response of the eyes-closed condition to perturbation is more oscillatory than that of the eyes-open condition. It seems that the model identified could be applicable to ergonomics, sports, or clinical situations.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 1998, 4, 4; 485-498
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Hook Handles in a Pulling Task
    Autorzy:
    Kong, Y. K.
    Freivalds, A.
    Kim, S. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/90931.pdf
    Data publikacji:
    2005
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    handle evaluation
    finger/phalange force contributions
    hook pulling task
    uchwyt narzędziowy
    kończyna górna
    ergonomia
    ocena sprzętu i wyposażenia
    pozycja przy pracy
    Opis:
    To evaluate the effect of handle design characteristics on subjective ratings and pulling forces, meat-hook handles with various handle shapes, sizes, and hook positions were tested in a pulling task. Finger and phalange force data measured by force sensitive resistors and subjective ratings of discomfort were also evaluated. Generally subjects preferred 37-mm double frustum, 30-mm oval handles followed by 30-mm double frustum handles, 37-mm oval, and 45-mm double frustum handles. In the analyses of total pulling force, 37- and 45-mm double frustum handles showed less required pulling force than the others. The averages of finger force contributions to the total pulling force were 27.2, 28.1, 23.9, and 20.8% in order from index to little fingers. The average of phalange force contributions were 28.8, 33.6, and 37.6% for the distal, middle, and proximal phalanges, respectively. The findings illustrate that the pulling finger forces and subjective discomfort ratings were related to the handle shape as well as handle size.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2005, 11, 3; 303-313
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effects of Experience and the Presence of a Scaffold Handrail on Postural and Spinal Stability in Construction Workers
    Autorzy:
    Min, S. N.
    Kim, J. Y.
    Parnianpour, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/91154.pdf
    Data publikacji:
    2014
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    fall
    low back pain
    postural stability
    lumbar stability
    construction
    injury
    ból pleców
    stabilność postawy
    pracownicy budowlani
    rusztowanie budowlane
    Opis:
    The goal of this study was to quantify the effect of experience and handrail presence on trunk muscle activities, rotational spinal stiffness and postural stability of construction workers. We evaluated spinal stability, and objective and subjective postural stability in 4 expert and 4 novice construction workers who were performing a manual task in a standing position on a scaffold, with and without a safety handrail. Center of pressure was computed using measurements taken with insole pressure transducers. Muscle activity was monitored usingsurface electrodes placed on 8 trunk muscles that predicted active trunk rotational stiffness. Standard deviations of the center of pressure, back muscle activity and spinal stiffness were greater in novices and in the absence of a handrail. We infer that the risk of a fall due to postural and spinal instability may be greater with a lower level of experience and in the absence of a safety handrail.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2014, 20, 3; 491-502
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Systematic Procedure for Modeling Usability Based on Product Design Variables: A Case Study in Audiovisual Consumer Electronic Products
    Autorzy:
    Kim, K.-J.
    Han, S. H.
    Yun, M. H.
    Kwahk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/90811.pdf
    Data publikacji:
    2002
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    usability evaluation
    human interface elements
    consumer electronic products
    produkty przemysłowe
    ocena zgodności wyrobów
    ocena użyteczności
    produkty elektroniczne
    Opis:
    A systematic modeling approach to describing, prescribing, and predicting usability of a product has been presented. Given the evaluation results of the usability dimension (UD) and the measurement of the product’s design variables, referred to as the human interface elements (HIEs), the approach enables one to systematically assess the relationship between the UD and HIEs. The assessed relationship is called a usability model. Once built, such a usability model can relate, in a quantitative manner, the HIEs directly to the UDs, and thus can serve as an effective aid to designers by evaluating and predicting the usability of an existing or hypothetical product. A usability model for elegance of audiovisual consumer electronic products has been demonstrated.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2002, 8, 3; 387-406
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ergonomic Hand Tool and Desk and Chair Development Process
    Autorzy:
    Shin, D.
    Kim, J. Y.
    Hallbeck, M. S.
    Haight, J. M.
    Jung, M. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/89795.pdf
    Data publikacji:
    2008
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    ergonomics process
    hand tool
    desk and chair
    Opis:
    This paper suggests a practical and simple process consisting of 8 stages: needs assessment, ergonomics guidelines, anthropometry, brainstorming and idea sketch, preliminary model, drafting and rendering, working prototype, and user trials. The feasibility of this process was verified with the development of a modified clamping hand tool and a new student desk and chair. The case studies showed how design difficulties were overcome by integrating ergonomics guidelines in the process.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2008, 14, 2; 247-252
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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