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    Wyświetlanie 1-5 z 5
    Tytuł:
    Effects of an abdominal drawing-in manoeuvre on stabilometric and gait parameters in adults: a pilot study
    Autorzy:
    Linek, Paweł
    Nowakowska, Katarzyna
    Michnik, Robert
    Myśliwiec, Andrzej
    Mikołajowski, Grzegorz
    Gzik, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/454836.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
    Tematy:
    gait
    stabilometric parameters
    Opis:
    Introduction. To our knowledge, no studies have checked the effect of the abdominal drawing-in maneuver (ADIM) on gait and stabilometric parameters in lower back pain (LBP) and pain-free subjects Aim. To assess the effect of sustained ADIM on a) gait pattern and b) stabilometric parameters with opened eyes and closed eyes in an adult population. Material and Methods. A group of 20 adults were invited to participate in the study. The Oswestry Disability Index was used for assessing LBP. Gait analysis was performed on a treadmill ZEBRIS FDM-T. The static balance assessment was performed on a stabilometric platform ZEBRIS FDM-S. Results. There were no significant differences in all tests conducted on the stabilometric platform. Results of gait analysis showed between-group differences in the main effect of group (Non-LBP vs. LBP) for the difference in maximal vertical ground reaction force during the terminal stance (GRFts). The mean GRFts value in the Non-LBP group was greater by 14.8 N (95% CI 9.55–20.1) compared with the LBP group (Table 3). Conclusions. ADIM has no immediate effects on selected stabilometric and gait parameters in the study group. No effect was seen in subjects with and without pain during the examination.
    Źródło:
    European Journal of Clinical and Experimental Medicine; 2017, 3; 257-262
    2544-2406
    2544-1361
    Pojawia się w:
    European Journal of Clinical and Experimental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the strength properties of materials intended for tracheobronchial tubes
    Autorzy:
    Sobota, Robert
    Markowski, Jarosław
    Joszko, Kamil
    Gzik-Zroska, Bożena
    Kawlewska, Edyta
    Gzik, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/1844981.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    thermoplastic elastomer
    tracheobronchial tubes
    oxidative degradation
    hydrolytic degradation
    Opis:
    The desire to increase the comfort of patients and to continue production despite the decreasing amount of available materials on the market has led to the constant search for novel materials that could be used to obtain tracheobronchial tubes. The aim of this study is to determine the mechanical properties of a new thermoplastic elastomer. Two materials - the thermoplastic elastomer and the natural rubber were subjected to three tests: static tensile test, static compression test and static three-point bending test. During the static tensile test, samples of the tested materials were examined, and during the next two examinations, the final products. The materials underwent the processes of sterilization, hydrolytic degradation and degradation by oxidation. The treated samples were also tested in order to compare the obtained results. The mechanical properties of the tested materials improved both after the hydrolytic degradation and oxidative degradation, as well as after the sterilization process. Yet the thermoplastic elastomer revealed a more noticeable increase. The elastomer hardening is a positive phenomenon potentially leading to fewer accidental closures of the tubes cross-section. Both the sterilization process and various degradation methods improved the mechanical properties by strengthening the tested materials. This phenomenon seems to be desirable to avoid the closure of the implemented tube during its application.
    Źródło:
    Engineering of Biomaterials; 2020, 23, 156; 10-16
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of gait stability and preferred walking speed in virtual reality
    Autorzy:
    Wodarski, Piotr
    Jurkojć, Jacek
    Polechoński, Jacek
    Bieniek, Andrzej
    Chrzan, Miłosz
    Michnik, Robert
    Gzik, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/306508.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    stabilność chodu
    chód na bieżni
    prędkość marszu
    gait stability
    gait on treadmill
    preferred walking speed
    gait variability
    Opis:
    Analysis of human gait as well as diagnosis of human locomotion organ should always be conducted with velocity of gait equal to Preferred Walking Speed (PWS). The literature review shows that the PWS value is not the same in real and virtual environment. The aim of this study was to determine PWS values in both environments and to specify values of parameters used in equations enabling PWS calculations on the basis of lower limb length. Methods: Research-related tests involved 40 subjects walking on the treadmill and wearing HMD goggles. The spatial scenery made participants feel like during a walk in the park. The tests included measurements of displacements of the COP, allowing for the calculation of the Lyapunov exponent and Floquet Multiplier. Both coefficients were used to identify stability at various gait velocities. Results: The analysis revealed that the PWS in relation to gait on the treadmill with VR was lower than the PWS without VR. The final stage of research involved the determination of new values of coefficients of the formula enabling the identification of the velocity of comfort of gait in VR. Conclusions: Obtained results proved that PWS in real and virtual environment are different. The lower values were obtained for measurements in VR. On the basis of these results, value of the “a” coefficient, used in PWS calculations on the basis of lower limb length, was re-determined. The new value makes it possible to assess PWS for gait conducted on treadmill in virtual environment, what can be very important in gait evaluation.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2020, 22, 1; 127-134
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza biomechaniczna chodu weterana wojennego – analiza przypadku
    Biomechanical analysis of war veteran gait - case analysis
    Autorzy:
    Nowakowska-Lipiec, Katarzyna
    Jochymczyk-Woźniak, Katarzyna
    Mikuła, Barbara
    Wolański, Wojciech
    Gzik, Marek
    Michnik, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/2201493.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Śląska. Katedra Biomechatroniki
    Tematy:
    analiza chodu
    BTS Smart
    wydatek energetyczny
    weteran wojenny
    gait analysis
    energy expenditure
    war veteran
    Opis:
    W pracy dokonano oceny biomechanicznej funkcji lokomocyjnych weterana wojennego. Uzyskane dla weterana wojennego wyniki ilościowej analizy chodu porównano z wartościami otrzymanymi dla grupy 56 zdrowych osób dorosłych, bez zaburzeń w obrębie narządu ruchu. Badania doświadczalne przeprowadzono z wykorzystaniem systemu optoelektronicznego BTS Smart. Analizie porównawczej poddano parametry czasowo-przestrzenne i kinematyczne chodu oraz zmiany energii całkowitej, potencjalnej, wypadkowej energii kinetycznej w czasie chodu. Uzyskane dla weterana wojennego wyniki znacznie odbiegały od wartości/zakresów normatywnych, wskazując na znaczne obrażenia aparatu ruch, które poniósł podczas wybuchu improwizowanego urządzenia wybuchowego.
    In the work the biomechanical evaluation of locomotion functions of a war veteran was made. The results of the quantitative gait analysis obtained for a war veteran were compared with the values obtained for a group of 56 healthy adults without locomotor disorders. Experimental studies were carried out using the BTS Smart optoelectronic system. The spatiotemporal and kinematic parameters of gait as well as changes in total energy, potential energy, kinetic energy and its components during gait were subjected to comparative analysis. The results obtained for a war veteran differed significantly from normative values / ranges, indicating significant injuries to the apparatus, which he suffered during the explosion of the improvised explosive device.
    Źródło:
    Aktualne Problemy Biomechaniki; 2019, 18; 29--37
    1898-763X
    Pojawia się w:
    Aktualne Problemy Biomechaniki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Finite element head model for the crew injury assessment in a light armoured vehicle
    Autorzy:
    Burkacki, Michał
    Wolański, Wojciech
    Suchoń, Sławomir
    Joszko, Kamil
    Gzik-Zroska, Bożena
    Sybilski, Kamil
    Gzik, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/27324139.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    head model
    HIC
    head injury
    safety assessment
    model głowy
    uraz głowy
    ocena bezpieczeństwa
    Opis:
    Purpose: The aim of this paper was the development of a finite element model of the soldier’s head to assess injuries suffered by soldiers during blast under a light armoured vehicle. Methods: The application of a multibody wheeled armoured vehicle model, including the crew and their equipment, aenabled the researchers to analyse the most dangerous scenarios of the head injury. These scenarios have been selected for a detailed analysis using the finite element head model which allowed for the examination of dynamic effects on individual head structures. In this paper, the authors described stages of the development of the anatomical finite element head model. Results: The results of the simulations made it possible to assess parameters determining the head injury of the soldier during the IED explosion. The developed model allows the determination of the parameters of stress, strain and pressure acting on the structures of the human head. Conclusion: In future studies, the model will be used to carry out simulations which will improve the construction of the headgear in order to minimize the possibility of the head injury.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2020, 22, 2; 173--183
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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