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    Wyświetlanie 1-6 z 6
    Tytuł:
    Time motion differences between Romanian and Polish high level young soccer players during 6 vs. 6 small sided games as an effect of training program
    Autorzy:
    Jastrzębski, Zbigniew
    Radzimiński, Łukasz
    Stefaniak, Arkadiusz
    Dragos, Paul
    Dumitrescu, Gheorghe
    Stępień, Piotr
    Mrozik, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1054944.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    heart rate response
    small-sided games
    time-motion analysis
    Opis:
    The purpose of this study was to present a time motion differences between Romanian and Polish young soccer players during 6 vs 6 small sided games. Young male football players from Schools of Sports Masters in Oradea (Romania) and Łódź (Poland) participated in the study. During the training session the players participated in four small-sided games 6 vs. 6 with goalkeepers (4 × 4 min, 3 min of active recovery). Heart rate responses and distance covered during small-sided games were compared. There were significant differences in the distance covered by both nationality players and age groups in reference to each intensity zone. Polish players coverd significantly longer distance compared with romanian soccer players. The results of motion abilities of young players from two countries with different training systems show that training programs can have a significant effect on adoptive abilities of the players.
    Źródło:
    Central European Journal of Sport Sciences and Medicine; 2015, 10, 2; 55-61
    2300-9705
    2353-2807
    Pojawia się w:
    Central European Journal of Sport Sciences and Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantifying the Physical Demands of Small Sided Games in Rugby Union: Contact vs. Non-contact
    Autorzy:
    Chadwick, Lydia
    Page, Richard M.
    Langley, Ben
    Powiązania:
    https://bibliotekanauki.pl/articles/1030675.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    GPS
    physical fitness
    rugby
    small sided game
    time motion analysis
    Opis:
    This study aimed to compare the physical demands of contact small sided game (CSSG), non-contact small sided game (NCSSG) and match play in female rugby union. Fifteen female rugby union players participated within this study. Participants completed two testing sessions. Session one involved two 20-minute small sided games (contact and non-contact). Session two involved a competitive rugby union game. Movement characteristics, heart rate, PlayerLoadTM and tackles were recorded using GPS units and heart rate monitors. No significant differences were identified between conditions in relation to average heart rate or time spent in different heart rate zones. Significant differences were identified between conditions for distance, normalised PlayerLoadTM and tackles. Distance covered was significantly higher in the non-contact small sided game, while normalised PlayerLoadTM and tackles were significantly lower in this condition. These findings suggest that the physiological stress, in terms of heart rate, is comparable between the match and both small sided games. Thus both small sided games seem to elicit an appropriate internal training response. However, the reductions in tackles and normalised PlayerLoadTM in the non-contact small sided game are likely to reduce injury risk, while the increase in distance covered may enhance the training stimuli provided in this condition.
    Źródło:
    Central European Journal of Sport Sciences and Medicine; 2019, 26, 2; 5-13
    2300-9705
    2353-2807
    Pojawia się w:
    Central European Journal of Sport Sciences and Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-ergodic probabilistic seismic hazard methodology using physics-based ground motion prediction: the case of LAquila, Italy - Part I Theoretical background
    Autorzy:
    Aguirre, Jedidiah Joel
    Rubino, Bruno
    Vassallo, Maurizio
    Di Giulio, Giuseppe
    Visini, Francesco
    Powiązania:
    https://bibliotekanauki.pl/articles/2035834.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Gdańska
    Tematy:
    non-ergodic probabilistic seismic hazard analysis
    physics-based ground motion prediction
    modified time-weakening friction law
    peak ground acceleration
    hazard curve
    City of L’Aquila
    analiza zagrożeń sejsmicznych
    przewidywanie ruchu naziemnego
    zmodyfikowane prawo tarcia
    szczytowe przyspieszenie naziemne
    krzywa zagrożenia
    L'aquila
    Opis:
    A non-ergodic probabilistic seismic hazard analysis (PSHA) utilizing the physics-based ground motion prediction was proposed in this study to minimize the increasing uncertainties in the use of empirical equations. The City of L’Aquila in Italy was used for illustrative purposes due to the availability of data and the historical seismicity of the site. A total of 28 seismic sources were identified in this study located within a 100 km radius from the city. Fault properties such as geometry and location were obtained from the literature, while the fault occurrence rates were obtained using the FiSH Code. A modified time-weakening friction law was proposed to model the seismic energy released by an earthquake. Uncertainties in different rupture scenarios were characterized through the Guttenberg-Richter Relations and the Characteristic Brownian Time Passage. Uncertainties in distances were characterized through probability mass functions, which were used to calculate the ground motion exceedance probabilities. The 1D elastodynamic equation coupled with the Hooke’s law was used to predict the peak ground acceleration (PGA), a measure of the ground shaking level. A hazard curve, which is a plot of PGA and its recurrence, was constructed and compared with the results of the study of Valentini, et al., AGU 100: Advancing Earth and Space Science (2019). The method proposed in this study predicts a higher hazard rates for PGAs less than 0.70 g, which implies that the ground motion was overestimated for very far sources. In contrast, lower hazard curves were observed for PGAs greater than 0.70g which can be attributed to fewer seismic sources considered in this study.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2020, 24, 2; 97-137
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-ergodic probabilistic seismic hazard methodology using physics-based ground motion prediction: the case of LAquila, Italy - Part II Methodology
    Autorzy:
    Aguirre, Jedidiah Joel
    Rubino, Bruno
    Vassallo, Maurizio
    Di Giulio, Giuseppe
    Visini, Francesco
    Powiązania:
    https://bibliotekanauki.pl/articles/2035843.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Gdańska
    Tematy:
    non-ergodic probabilistic seismic hazard analysis
    physics-based ground motion prediction
    modified time-weakening friction law
    peak ground acceleration
    hazard curve
    City of L’Aquila
    analiza zagrożeń sejsmicznych
    przewidywanie ruchu naziemnego
    zmodyfikowane prawo tarcia
    szczytowe przyspieszenie naziemne
    krzywa zagrożenia
    L'aquila
    Opis:
    A non-ergodic probabilistic seismic hazard analysis (PSHA) utilizing the physics-based ground motion prediction was proposed in this study to minimize the increasing uncertainties in the use of empirical equations. The City of L’Aquila in Italy was used for illustrative purposes due to the availability of data and the historical seismicity of the site. A total of 28 seismic sources were identified in this study located within a 100 km radius from the city. Fault properties such as geometry and location were obtained from the literature, while the fault occurrence rates were obtained using the FiSH Code. A modified time-weakening friction law was proposed to model the seismic energy released by an earthquake. Uncertainties in different rupture scenarios were characterized through the Guttenberg-Richter Relations and the Characteristic Brownian Time Passage. Uncertainties in distances were characterized through probability mass functions, which were used to calculate the ground motion exceedance probabilities. The 1D elastodynamic equation coupled with the Hooke’s law was used to predict the peak ground acceleration (PGA), a measure of the ground shaking level. A hazard curve, which is a plot of PGA and its recurrence, was constructed and compared with the results of the study of Valentini, et al., AGU 100: Advancing Earth and Space Science (2019). The method proposed in this study predicts a higher hazard rates for PGAs less than 0.70 g, which implies that the ground motion was overestimated for very far sources. In contrast, lower hazard curves were observed for PGAs greater than 0.70g which can be attributed to fewer seismic sources considered in this study.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2020, 24, 2; 137-153
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-ergodic probabilistic seismic hazard methodology using physics-based ground motion prediction: the case of LAquila, Italy - Appendices
    Autorzy:
    Aguirre, Jedidiah Joel
    Rubino, Bruno
    Vassallo, Maurizio
    Di Giulio, Giuseppe
    Visini, Francesco
    Powiązania:
    https://bibliotekanauki.pl/articles/2035851.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Gdańska
    Tematy:
    non-ergodic probabilistic seismic hazard analysis
    physics-based ground motion prediction
    modified time-weakening friction law
    peak ground acceleration
    hazard curve
    City of L’Aquila
    analiza zagrożeń sejsmicznych
    przewidywanie ruchu naziemnego
    zmodyfikowane prawo tarcia
    szczytowe przyspieszenie naziemne
    krzywa zagrożenia
    L'aquila
    Opis:
    A non-ergodic probabilistic seismic hazard analysis (PSHA) utilizing the physics-based ground motion prediction was proposed in this study to minimize the increasing uncertainties in the use of empirical equations. The City of L’Aquila in Italy was used for illustrative purposes due to the availability of data and the historical seismicity of the site. A total of 28 seismic sources were identified in this study located within a 100 km radius from the city. Fault properties such as geometry and location were obtained from the literature, while the fault occurrence rates were obtained using the FiSH Code. A modified time-weakening friction law was proposed to model the seismic energy released by an earthquake. Uncertainties in different rupture scenarios were characterized through the Guttenberg-Richter Relations and the Characteristic Brownian Time Passage. Uncertainties in distances were characterized through probability mass functions, which were used to calculate the ground motion exceedance probabilities. The 1D elastodynamic equation coupled with the Hooke’s law was used to predict the peak ground acceleration (PGA), a measure of the ground shaking level. A hazard curve, which is a plot of PGA and its recurrence, was constructed and compared with the results of the study of Valentini, et al., AGU 100: Advancing Earth and Space Science (2019). The method proposed in this study predicts a higher hazard rates for PGAs less than 0.70 g, which implies that the ground motion was overestimated for very far sources. In contrast, lower hazard curves were observed for PGAs greater than 0.70g which can be attributed to fewer seismic sources considered in this study.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2020, 24, 2; 166-182
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-ergodic probabilistic seismic hazard methodology using physics-based ground motion prediction: the case of LAquila, Italy - Part III Results and Discussion
    Autorzy:
    Aguirre, Jedidiah Joel
    Rubino, Bruno
    Vassallo, Maurizio
    Di Giulio, Giuseppe
    Visini, Francesco
    Powiązania:
    https://bibliotekanauki.pl/articles/2035849.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Gdańska
    Tematy:
    non-ergodic probabilistic seismic hazard analysis
    physics-based ground motion prediction
    modified time-weakening friction law
    peak ground acceleration
    hazard curve
    City of L’Aquila
    analiza zagrożeń sejsmicznych
    przewidywanie ruchu naziemnego
    zmodyfikowane prawo tarcia
    szczytowe przyspieszenie naziemne
    krzywa zagrożenia
    L'aquila
    Opis:
    A non-ergodic probabilistic seismic hazard analysis (PSHA) utilizing the physics-based ground motion prediction was proposed in this study to minimize the increasing uncertainties in the use of empirical equations. The City of L’Aquila in Italy was used for illustrative purposes due to the availability of data and the historical seismicity of the site. A total of 28 seismic sources were identified in this study located within a 100 km radius from the city. Fault properties such as geometry and location were obtained from the literature, while the fault occurrence rates were obtained using the FiSH Code. A modified time-weakening friction law was proposed to model the seismic energy released by an earthquake. Uncertainties in different rupture scenarios were characterized through the Guttenberg-Richter Relations and the Characteristic Brownian Time Passage. Uncertainties in distances were characterized through probability mass functions, which were used to calculate the ground motion exceedance probabilities. The 1D elastodynamic equation coupled with the Hooke’s law was used to predict the peak ground acceleration (PGA), a measure of the ground shaking level. A hazard curve, which is a plot of PGA and its recurrence, was constructed and compared with the results of the study of Valentini, et al., AGU 100: Advancing Earth and Space Science (2019). The method proposed in this study predicts a higher hazard rates for PGAs less than 0.70 g, which implies that the ground motion was overestimated for very far sources. In contrast, lower hazard curves were observed for PGAs greater than 0.70g which can be attributed to fewer seismic sources considered in this study.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2020, 24, 2; 153-166
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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