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    Wyświetlanie 1-6 z 6
    Tytuł:
    Assessing the asymmetry of free gait in healthy young subjects
    Autorzy:
    Kaczmarczyk, K.
    Błażkiewicz, M.
    Wit, A.
    Wychowański, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/307052.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    wskaźnik symetrii
    asymetria chodu
    system Zebris
    symmetry index
    gait asymmetry
    Zebris system
    Opis:
    Purpose: The purpose of this study was to derive reference values for a four-level scale intended to evaluate variation in free gait asymmetry measurements in healthy subjects. Methods: This evaluation is based on kinetic values for the left and right lower limbs during gait, registered with advanced measurement systems and assessed using the symmetry index (SI) developed by Robinson. Results: For the majority of parameters, the SI does not follow normal distribution. As such, quartile values were used to create intervals for a four-step scale of assessing symmetry of free gait in healthy subjects for each studied gait parameter. The SI rating intervals were from 0% (very good symmetry) to 21.2% (very poor symmetry) for kinetic parameters. The poorest symmetry was observed for horizontal force F3. Conclusions: The four-step scale of assessing symmetry in free gait in healthy subjects can be used in diagnosing gait disorders, devising surgical treatment strategies, and monitoring the rehabilitation process. Reference values for intervals of symmetry indicators in healthy subjects can be used as criteria for comparing individuals with/without disabilities.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2017, 19, 3; 101-106
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Właściwości dynamiczne mięśni prostujących i zginających w stawie kolanowym przed i po okresie przygotowawczym u zawodowych piłkarzy nożnych
    Dynamics properties of lower extremities in elite football players before and after a five weeks training camp
    Autorzy:
    Korbolewska, O.
    Plenzler, M.
    Popieluch, M.
    Wychowański, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/99165.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Śląska. Katedra Biomechatroniki
    Tematy:
    piłka nożna
    kończyna dolna
    staw kolanowy
    uraz
    moment sił mięśniowych
    badania biomechaniczne
    football
    lower extremity
    knee joint
    injury
    muscle forces moment
    biomechanic tests
    Źródło:
    Aktualne Problemy Biomechaniki; 2012, 6; 65-74
    1898-763X
    Pojawia się w:
    Aktualne Problemy Biomechaniki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laterality versus jumping performance in men and women
    Autorzy:
    Trzaskoma, Z.
    Ilnicka, L.
    Wiszomirska, I.
    Wit, A.
    Wychowański, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/306807.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    stopa
    modelowanie sylwetki
    płeć
    dwupostaciowość
    limb dominance
    foot structure
    jumping ability
    bilateral deficit
    sexual dimorphism
    Opis:
    Purpose: The aim of this study was to investigate relationships between functional asymmetry of lower limbs, taking into account morphological features of the feet, and jumping ability in men and women. Methods: The study population consisted of 56 subjects, 30 women (age: 20.29 ± 0.59 years; body mass: 58.13 ± 4.58 kg, body height: 165.60 ± 5.03 cm) and 26 men (age: 20.41 ± 0.78 years, body mass: 78.39 ± 8.42 kg, body height: 181.15 ± 6.52 cm). The measurements of longitudinal arches were performed with the plantographic method on the basis of Clarke’s angle mapped on a computer foot print. The measurements of jumping performance during bilateral (two legs) and unilateral (single-leg) counter movement jump (CMJ) were done on force plate. All subjects jumped three times each type of jump (total 9 jumps): three right leg, three left leg and three two legs. We put the test results through a detailed statistical analysis with the Statistica 8.0. The t-test for dependent variables and the Wilcoxon signed-rank test for divergent variances of the features compared. The analysis of relationships between the chosen podometric and plantographic features and jumping performance was conducted on the basis of the Pearson product-moment correlation coefficient (for the features which presented normal distribution, according to the Shapiro–Wilk test). Results: The correlations between values of height of single-leg jumps (right and left) and bilateral jumps, and foot indices were found in few cases only in men who had greater values of jump height with the non-dominant limb. We did not find a significant difference in jumping ability between the dominant limb and the non-dominant limb in women. We found bilateral deficits in jumping ability in the study groups, though we did not find significant differences (P ≤ 0.05) between the values for women (a mean of 6.5%) and for men (a mean of 8.4%). Conclusion: We found significant gender differences of the correlations between the values of height of jumps (single-leg and bilateral jumps) and foot indices.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 1; 103-110
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laterality versus ankle dorsiand plantarflexion maximal torques
    Autorzy:
    Trzaskoma, Z.
    Ilnicka, L.
    Wiszomirska, I.
    Wit, A.
    Wychowański, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/306924.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    limb laterality
    maximal torques
    morphological feet asymmetry
    sexual dimorphism
    stopa
    asymetria
    budowa morfologiczna
    kończyna dolna
    dwupostaciowość
    Opis:
    Purpose: The aim of the study was to analyze the connections between the functional asymmetries of lower limbs, taking into account morphological feet features, and ankle dorsi- and plantarflexion maximal torques in men and women. Methods: The study population consisted of 56 young subjects among which there were 30 women and 26 men. The assessment of upper and lower limbs’ side dominance was performed on the basis of surveys, verified with simple motor tasks that resembled the actions characteristic of the upper and lower limbs. The measurements of body build, as well as foot build, were performed with the use of accepted instruments according to the anthropometry standards. The measurements of longitudinal foot arches were conducted using the pantographic method. Ankle dorsi- and plantarflexion maximal torque values were measured under static conditions. Results: We found a positive correlation between the functional dominance of lower limb and greater strength only for ankle plantarflexion maximal torque values in correct laterality variants in women and in only one variant in men. No correlation was found between foot morphological asymmetry and the ankle dorsiand plantarflexion maximal torque values, either in women or in men. Conclusion: Our results support the idea that the functional lower limb dominance is not equivalent to the greater muscle strength.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 2; 131-141
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wybrane problemy metrologiczne oceny morfologicznej i funkcjonalnej stopy w leczeniu palucha koślawego
    Selected metrological problems of morphological and functional foot assessment
    Autorzy:
    Wychowański, M.
    Nowiński, K.
    Borucki, B.
    Wit, A.
    Adamczyk, P.
    Laskowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/156354.pdf
    Data publikacji:
    2012
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    paluch koślawy
    model szkieletu stopy
    charakterystyka chodu
    wskaźnik symetrii
    hallux valgus
    foot skeleton model
    gait profile
    symmetry index
    Opis:
    Paluch koślawy jest chorobą często występującą u kobiet. Wykonano RTG obu stóp w projekcji AP, bocznej i na palcach oraz MRI. Opracowano, trójwymiarowy model strukturalny szkieletu stopy. Przeanalizowano błędy wyznaczenia położeń poszczególnych znaczników. Zbadano równowagęu zdrowych osób metodą stabilograficzną. Pomiarów charakterystyk chodu dokonano na ścieżce podoskopowej. Względem młodszych kobiet przeprowadzono normowanie wyników starszych kobiet. Parametry charakteryzujące badane kobiety nie mają rozkładu normalnego. Profil chodu kobiet starszych opisano 19 parametrami. Różnice w chodzie obu badanych grup kobiet przejawiają się głównie w parametrach geometrycznych. Normy symetrii kobiet podano dla 1 kwartyla, mediany i 3 kwartyla.
    Hallux valgus is one of the most frequent forefoot disease in women. There was taken RTG of both feet in the AP, lateral and tip toe projection as well as MRI. A three-dimensional structural foot skeleton model was developed. There was analysed the uncertainty of landmark positioning together with the influence on foot geometric features. Balance mechanism was examined in healthy subjects using the HUR stabilographic platform. Gait characteristics were made on the pressure distribution plate produced by ZEBRIS. There were separated two groups of younger women and a group of older women. Normalization of older women was carried out in relation to the younger group. The parameters characterizing the investigated women did not have a normal distribution. The gait profile of older women is based on 19 parameters. Differences in gait performance of both groups of women are mainly manifested in the geometric parameters. The norms of the symmetry index for the women are given as 1 quartile, median and 3 quartile.
    Źródło:
    Pomiary Automatyka Kontrola; 2012, R. 58, nr 1, 1; 48-51
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technical and organizational and legal conditions relating to the power supply of a railway vehicle equipped with automatic train control system
    Autorzy:
    Jacyna, M.
    Kukulski, J.
    Gołębiowski, P.
    Jasiński, S.
    Wychowański, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/245650.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    railway transport
    automatic train control system
    electricity
    rmCBTC
    power requirements
    Opis:
    Railway transport is considered the most environmentally friendly. However, taking into account all factors, (including point pollution associated with the production of energy necessary for the movement of electric traction vehicles); this position is attractive, but a little less. Therefore, it is necessary to ensure that the amount of energy produced for railway transport is sufficient, but the lowest as possible. Creating new systems whose components for correct operation require a supply of electricity, they should be designed in such a way as to consume as little energy but meeting a series of standards. The aim of the article is to review selected requirements for the power supply of a railway vehicle equipped with automatic train control devices and identification of energy demand in the scope of supplying the rmCBTC on-board system, which is being developed by Rail-Mil Computers Company from Warsaw and the Faculty of Transport of the Warsaw University of Technology. The article presents an analysis of formal and legal requirements in the field of traction vehicles. Reference was made to the list of the Office of Rail Transport and the standards not included in it − PN-EN 50155, PN-EN 61000-6 and PN-EN 50125-2. Energy requirements in the field of traction vehicles equipped with an automatic train control system have been identified − e.g. voltage range of the on-board system, permissible decays, voltage dips, disturbances and environmental requirements. The energy requirements for the rmCBTC on-board system were also identified.
    Źródło:
    Journal of KONES; 2018, 25, 4; 533-545
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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