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Wyświetlanie 1-6 z 6
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 1-6 z 6

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