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Wyświetlanie 1-13 z 13
Tytuł:
The use of individual sports profiles of child athletes and nonathletes in recommending sports to be practiced
Autorzy:
Kandrac, Robert
Peric, Tomas
Dzugas, Dalibor
Kacur, Peter
Tomkova, Petra
Kokinda, Marek
Turek, Milan
Powiązania:
https://bibliotekanauki.pl/articles/1921968.pdf
Data publikacji:
2020-01-08
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
talent selection
individual sports profile
motor performance capacity
Opis:
The issue of talent selection and identification has been addressed by a variety of authors. However, few studies focus on sports recommended to be practiced by children on the basis of evaluating their performance or sports profiles. Material and Methods: The purpose of the study was to determine individual sports profiles of child athletes and nonathletes and recommend sports to be practiced. The participants were children aged 6 and 7 years who were first graders at elementary schools. Child athletes were children who participated in organized sports practice in soccer (n = 16), ice hockey (n = 29), and artistic gymnastics (n = 10). Child nonathletes (n = 26) did not participate in any organized sports practice within extracurricular activities or in sports clubs. Children performed a battery of 9 tests: sit-and-reach test, flexed arm hang (overhand grip), repeated routine with a stick, sit-ups, standing long jump, 4 x 10-meter shuttle run, rolling of three balls, 20-meter sprint and endurance shuttle run. To assess decision-making processes, children played a chasing game called "pull-the-flag" game. Results: As for the match between the sports practiced and the sports recommended to be practiced by child athletes, 20 children practiced the sports that were also recommended to be practiced on the basis of their individual sports profiles. According to their sports profiles, child nonathletes were recommended to do, in particular, rhythmic gymnastics, cycling, volleyball, tennis, and floorball. Conclusions: We may conclude that low number of children practice sports that match children's motor dispositions. Therefore, individual sports profiles need to be devised to provide children with recommendations concerning sports that match their talent.
Źródło:
Physical Activity Review; 2020, 1, 8; 1-8
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The somatic profile and motor performance of the students of the faculty of chemical and food technology slovak university of technology in Bratislava in five years period
Autorzy:
Robin, Pělucha
Jaroslav, Hančák
Powiązania:
https://bibliotekanauki.pl/articles/1031933.pdf
Data publikacji:
2016
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
college students
comparison of results
motor performance
somatic development
Opis:
The aim of our work is to find out level of somatic development and motor performance of students of the 1.st year - class of FCHPT STU in Bratislava in five years period in years 2011 – 2015 (1881 women and 797 men). We used standardized test battery to recognize motor performance. Comparison of the motion efficiency testing results we used the test of statistical significance of differences in mean values of the significance level p - value<0,05, in program Statgraphic (One Way – ANOVA). Based on the results of measuring the level of somatic development , we found out that the body height has stagnating tendency for both men and women categories. Body weight had a stable level in men until 2014 , but its value is about 5 kg higher than the population average . The women had body weight except in 2014 rising trend. Both in men and women category in 2015 significantly increased body weight . Observing body mass in dex ( BMI ) we found out a significant increase in values only for women. The relative value of the body fat in both men and women category at approximately the same level without significant difference index BMI more than men but the value of body fat on th e other hand they were worse . In the test results of motor performance , we found out significantly lower levels of aerobic endurance compared to the first measurement in 2011 , both men and women. In the case of speed - power capabilities of the arms and tors o as well as for the dynamic force abdominal and hip muscles we can ́t confirm increasing or decreasing tendency. From our research it is clear that aerobic endurance is the ability which has decreasing trend from year to year for both men and women category.
Źródło:
Physical Activity Review; 2016, 4; 147-153
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationships between socioeconomic factors versus the anthropometric and motor characteristics of Polish female university students (2000-2018)
Autorzy:
Podstawski, Robert
Marzec, Arkadiusz
Powiązania:
https://bibliotekanauki.pl/articles/1933036.pdf
Data publikacji:
2021-06-30
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
motor performance
somatic traits
socioeconomic indicators
female university students
Opis:
Aim: The aim of this study was to determine the relationships between socioeconomic factors (SES), anthropometric characteristics and motor abilities of female university students. Materials and Methods: The study was conducted in 2000-2018 on 3955 female university students aged 19.72 ± 0.75 years who were randomly selected from the population of students attending obligatory physical education (PE) classes. The participants' body mass and height were measured, and the students participated in 13 motor ability tests that assessed their speed/agility, flexibility, strength, endurancestrength, and endurance abilities. Multiple independent samples were compared using the KruskalWallis test or the mean-ranks post-hoc test when significant differences were observed in the participants' motor abilities. Results: Statistically significant differences in the participants' body mass, body height, BMI and motor abilities (speed/agility, flexibility - partly, strength, and strengthendurance) were associated with differences in the students' SES. Greater mean differences in SES were associated with differences in the anthropometric and motor characteristics of students. Environmental factors such as the place of permanent residence, monthly budgets, mother's and father's educational background were least likely to be associated with female students' endurance abilities. Conclusions: Female students who had higher monthly budgets, resided in large cities, and had better educated parents were generally taller and had a higher level of motor abilities. An inverse relationship was noted between motor abilities vs. body mass and BMI.
Źródło:
Physical Activity Review; 2021, 1, 9; 117-127
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of general motor performance in older school age pupils with a moderate mental disability
Autorzy:
Bartík, Pavol
Bolach, Bartosz
Powiązania:
https://bibliotekanauki.pl/articles/2011306.pdf
Data publikacji:
2015-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
motor performance
mentally disabled pupils
Eurofi t Special test battery
Opis:
The authors of the contribution deal with evaluation of general motor performance in older school age pupils with a moderate mental disability. The aim of the research was to find out differences in the general motor performance between mentally disabled pupils and non-disabled pupils. The research sample consisted of 100 pupils aged 13 to 15. They included 25 boys and 25 girls with a moderate mental disability and 25 boys and 25 girls without a mental disability. To evaluate the general motor performance, the European test of motor performance Eurofit Special was used, modified for the needs of mentally disabled persons by Jean-Claude de Potter (1996). The research confirmed that the general motor performance of the youth with a moderate mental disability was statistically significantly lower than that of their non-disabled peers.
Źródło:
The New Educational Review; 2015, 42; 253-263
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany w sprawności motorycznej wśród uczniów klas i-III ze środowiska wiejskiego w województwie śląskim w latach 1999-2012
Changes in motor performance among 1st, 2nd and 3rd class primary school students from rural areas in silesia province in the years 1999-2012
Autorzy:
Rodziewicz-Gruhn, Joanna
Szymanek, Marta
Połacik, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/423645.pdf
Data publikacji:
2014
Wydawca:
Lubuskie Towarzystwo Naukowe
Tematy:
boys
girls
motor performance
motor abilities
secular trend
dziewczęta
chłopcy
sprawność motoryczna
uzdolnienia motoryczne
trend sekularny
Opis:
The aim of the paper was to determine the level of motor development and changes in motor performance in children from rural areas from Częstochowa region (Silesia Province) examined in the years 1999 and 2012. The research included boys and girls aged 7-9 from primary schools in Wręczyca Wielka Commune in Kłobuck County (Silesia Province). The first study was conducted in November in the school year 1999/2000 and embraced 270 students (135 girls and 135 boys); the same number of students – 270 students (135 girls and 135 boys) – was examined in the school year 2012/2013. The evaluation of motor performance was done on the basis of Zuchora Physical Fitness Index following the instructions included in the manual. The results were subjected to statistical analysis and arithmetic means and measures of spread were calculated. In order to determine the directions and scope of changes in motor performance the 2012 study results were normalized to the results obtained in 1999. The assessment of the significance of differences was made with the help of t Student test. In the years 1999-2012 unambiguous significant changes in the level of motor performance in particular age groups were not observed in girls and boys aged 7-9 from rural areas. The observed changes in motor structure refer to the progress of results in agility tests and abdominal muscle strength tests as well as regression in speed in the case of girls. Other results were at similar level. In the case of boys, the authors reported a decrease in the level of results obtained in speed tests and tests of muscle strength of the arms. Whereas similar results were obtained in strength tests, abdominal muscle strength tests and jumping ability tests. The improvement in flexibility skills was also observed.
Celem niniejszego opracowania było określenie poziomu rozwoju motorycznego i zmian występujących w sprawności motorycznej dzieci ze środowiska wiejskiego z regionu częstochowskiego (woj. śląskie) badanych w latach 1999 i 2012 . W badaniach uczestniczyli dziewczęta i chłopcy w wieku 7 - 9 lat ze szkół podstawowych w gminie Wręczyca Wielka w powiecie kłobuckim (woj. śląskie). Pierwsze badanie zostało przeprowadzone w listopadzie w roku szkolnym 1999/2000 i objęto nim 270 uczniów (135 dziewcząt i 135 chłopców), podobnie kształtuje się liczba badanych w roku szkolnym 2012/2013 - 270 uczniów (135 dziewcząt i 135 chłopców). Sprawność motoryczną badanych oceniono w oparciu o próby Indeksu Sprawności Fizycznej Zuchory stosując się do zaleceń zawartych w instrukcji. Wyniki badań poddano analizie statystycznej wyliczając średnie arytmetyczne i miary rozsiewu. W celu określenia kierunków i rozmiarów przemian w sprawności motorycznej wyniki badań z roku 2012 unormowano na rezultaty uzyskane w 1999 roku. Oceny istotności różnic dokonano przy pomocy testu t- Studenta. W latach 1999-2012 u dziewcząt i chłopców w wieku 7-9 lat pochodzących ze środowiska wiejskiego nie odnotowano jednoznacznych istotnych zmian w poziomie sprawności motorycznej w poszczególnych grupach wieku. Zaobserwowane zmiany struktury motoryczności w przypadku dziewcząt dotyczą progresu rezultatów w próbach gibkości i siły mięśni brzucha oraz regresu w szybkości. Pozostałe wyniki były na zbliżonym poziomie. W przypadku chłopców, odnotowano obniżenie się poziomu wyników uzyskanych w próbach : szybkości i siły mięśni ramion, zbliżone wyniki uzyskano natomiast w próbach wytrzymałości, siły mięśni brzucha, skoczności. Odnotowano również poprawę zdolności gibkościowych.
Źródło:
Rocznik Lubuski; 2014, 40, 2; 107-120
0485-3083
Pojawia się w:
Rocznik Lubuski
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electromagnetic analysis, efficiency map and thermal analysis of an 80-kW IPM motor with distributed and concentrated winding for electric vehicle applications
Autorzy:
Młot, Adrian
Korkosz, Mariusz
Lechowicz, Andrzej
Podhajecki, Jerzy
Rawicki, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/2172808.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AC losses
concentrated winding
distributed winding
motor performance
radial flux permanent magnet motor
slot fill factor
thermal analysis
Opis:
This paper presents a comparison of an AC radial flux interior permanent magnet (IPM) motor with the distributed winding (DW) and concentrated winding (CW). From time to time, manufacturers of electric vehicles change the design of electric motors, such changes may include changing the DW into CW and vice versa. A change to the winding in a radial permanent magnet synchronous motor may lead to a change in motor parameters during motor operation and /or change in the distribution of the magnetic field and thermal circuit of the electrical machine. The electromagnetic analysis, efficiency map, mechanical stress, and thermal analysis of the machine with the DW and CW are presented in this paper. This article describes the advantages and disadvantages of selected stator winding designs and helps understand manufacturers’ designers how the DW and CW play a key role in achieving the designed motor’s operational parameters such as continuous performance. Analyzing the performance of both machines will help identify their advantages and disadvantages with regard to thermal phenomena, magnetic field and operational parameters of the presented IPM prototypes. Both prototypes are based on commonly used topologies such as 12/8 (slot/pole) and 30/8 (slot/pole) IPM motors consisting of magnets arranged in a V-shape. The AC IPM motor was designed for an 80 kW propulsion system to achieve 170 N·m at a base speed of 4 500 rpm. Modern CAD tools are utilized throughout the numerical computations based on 2-D finite element methods. Selected test data are used to verify and validate the accuracy of finite element models.
Źródło:
Archives of Electrical Engineering; 2022, 71, 4; 981--1002
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Carbon Dioxide Inhalation on Psychomotor and Mental Performance During Exercise and Recovery
Autorzy:
Vercruyssen, M.
Kamon, E.
Hancock, P. A.
Powiązania:
https://bibliotekanauki.pl/articles/91095.pdf
Data publikacji:
2007
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
carbon dioxide
behavioral toxicology
SCBA
cognition motor performance
psychomotor performance
praca umysłowa
dwutlenek węgla
wydolność
praca fizyczna
wdychanie
Opis:
On separate days, 6 highly trained participants performed psychomotor tests while breathing for 60 min 3 carbon dioxide (CO2) mixtures (room air, 3% CO2, or 4% CO2) prior to, between, and following two 15- min treadmill exercise bouts (70% VO2max). Each individual was extensively practiced (at least 4 days) before testing began, and both gas conditions and order of tasks were counterbalanced. Results showed physiological reactions and work-related psychomotor effects, but no effects of gas concentration on addition, multiplication, grammatical reasoning, or dynamic postural balance. These findings help define behavioral toxicity levels and support a re-evaluation of existing standards for the maximum allowable concentrations (also emergency and continuous exposure guidance levels) of CO2. This research explored the selection of psychometric instruments of sufficient sensitivity and reliability to detect subtle changes in performance caused by exposure to low levels of environmental stress, in this case differential levels of CO2 in the inspired air.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2007, 13, 1; 15-27
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Match Performance of Full-backs from Selected European Soccer Leagues
Autorzy:
Konefał, Marek
Chmura, Paweł
Andrzejewski, Marcin
Pukszta, Dawid
Chmura, Jan
Powiązania:
https://bibliotekanauki.pl/articles/1054743.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
kinematic analysis
match performance
motor activity
soccer
Opis:
The aim of the present study was the analysis of match activities of full-backs from selected European national soccer leagues. The study sample comprised 30 full-backs playing in the autumn round of the 2014/15 season from five European national top-tier leagues: English Premier League, Spanish Primera Division, German Bundesliga, Russian Priemjer Liga and Italian Serie A. The performance of full-backs (left-back and right-back) from each selected team was analyzed using a professional match analysis system OptaPro which tracks every possible type of ball touch and on the ball action in match covered by a rigid set of definitions. The data for analysis included the total number of passes, total number of crosses, and total number of ball touches performed by the fullbacks in three zones of the pitch: attack, midfield and defense. The study results showed that the full-backs from the Spanish Primera Division executed the highest number of passes and crosses as well as ball touches in the attack zone. They also performed the lowest number of passes in the midfield and defense zones, in which the highest percentage of passes was achieved by the full-backs from the German league teams. The study indicates that in modern soccer defenders must possess a high level of offensive skills that can be necessary in the last stage of a team’s attack.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2015, 11, 3; 45-53
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational investigation of compression ratio and bore diameter influence on engine performance and knock intensity
Autorzy:
Gandyk, M.
Haller, P.
Jankowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/244667.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
simulation
combustion engines
compression ratio
motor sport
engine performance
knocks
Opis:
Processes of the combustion in combustion engines depend on cylinder bore and compression ratio. Compression ratio is a ratio of in-cylinder volume when piston is in bottom dead centre to volume when piston is in top dead centre. Theoretical engine efficiency is increasing together with compression ratio. However, in the real engine there are also other phenomena affecting the efficiency of the engine, which could results in lower performance of engine with higher compression ratio. This study presents knock intensity and performance gain in engine speed function of the 0D-1D engine model with different pistons set. Knock intensity is founded by implementing in combustion process knock sub-model based on Douaud and Eyzat induction time correlation using different pistons geometry. Examined engine model is air restricted Formula Student motorcycle engine. Mounted in intake system, air restrictor decreases knock intensity. Therefore, compression ratio could be increased. It was noticed that bigger bore diameter could reduce knock intensity. Researches realized that bigger bore size could cause performance drop at high rpm when flow is chocked. With changing of compression ratio, performance characteristic changes. Growing compression ratio decrease torque on low engine speed and increase on high engine speed. Further characteristic of the engine could be tuned by matching pistons with modified bore size and compression ratio.
Źródło:
Journal of KONES; 2018, 25, 2; 129-134
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study on the Effect of Human Laterality, Type of Computer and Noise on Operators’ Performance of a Data Entry Task
Autorzy:
Khan, Z. A.
Rizvi, S. A. H.
Powiązania:
https://bibliotekanauki.pl/articles/90760.pdf
Data publikacji:
2009
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
equivalent noise level
motor-sidedness
visual display units
data entry task performance
Opis:
Effects of human laterality, type of computer and noise on computer operators’ performance of a data entry task were investigated. Seven right- and 7 left-motorsided male subjects performed the task on desktop and laptop computers in a sitting posture under varying noise levels. The mean number of characters entered per minute was statistically analysed. The right-motorsided operators entered more data than left-motorsided ones at each noise level. Operators performed better on desktop computers. Operators’ performance decreased when noise level increased from 82 to 92 dB(A) but it improved at 102 dB(A). Effects of laterality, type of computer and noise, and the interaction between laterality and noise were statistically significant. The interactions between laterality and type of computer, and type of computer and noise were statistically insignificant. Laterality was statistically significant at all noise levels and noise was statistically significant for right motor-sided operators only.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2009, 15, 1; 53-60
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantification of motor abilities during the execution of judo techniques
Autorzy:
Frassinelli, Stefano
Niccolai, Alessandro
Zich, Riccardo E.
Rosso, Valeria
Gastaldi, Laura
Powiązania:
https://bibliotekanauki.pl/articles/949742.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
IMU
dżudo
zdolności motoryczne
sztuki walki
inertial measurement unit (IMU)
sport performance
judo
martial art
motor abilities
motor capabilities
Źródło:
Acta of Bioengineering and Biomechanics; 2019, 21, 3; 3-12
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Engineering polymers with high mechanical and thermal resistance for electric motors
Autorzy:
Kantor, Ł.
Michalik, K.
Laska, J.
Powiązania:
https://bibliotekanauki.pl/articles/93102.pdf
Data publikacji:
2017
Wydawca:
Państwowa Wyższa Szkoła Zawodowa w Tarnowie
Tematy:
high-performance polymer
high thermal conductivity
electric motor material
PEEK PAI PPS
polimer wysokowydajny
wysoka przewodność cieplna
silnik elektryczny
Opis:
The aim of the research was to select and evaluate polymers that could be used as rotor insulation in electric motors based on Halbach array system. Which have specific material properties, such as high mechanical strength, high thermal resistance and, especially, high thermal conductivity, also at room and at elevated temperatures. Three high performance polymers were selected for the research: polyetheretherketone (PEEK), polyamideimide (PAI) and poly(p-phenylene sulphide) (PPS). Polymers were evaluated for mechanical strength, thermal conductivity, thermal diffusivity, specific heat capacity, linear thermal expansion and also differential scanning calorimetry (DSC) and thermal gravimetry (TG) analyses were carried out. Analyses are proved that all materials have appropriate properties for advanced electric motor insulator.
Źródło:
Science, Technology and Innovation; 2017, 1, 1; 39-43
2544-9125
Pojawia się w:
Science, Technology and Innovation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wielokryterialna analiza porównawcza pojazdu z silnikiem spalinowym i pojazdu z silnikiem elektrycznym pod względem funkcjonalności oraz skażenia środowiska
Multi-criteria comparative analysis of vehicle with combustion engine and electric in terms of functionality and environmental contamination
Autorzy:
Gawrońska, D.
Powiązania:
https://bibliotekanauki.pl/articles/322028.pdf
Data publikacji:
2014
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
kryterium
waga
parametry
funkcja przynależności
funkcje odniesienia
skażenie środowiska
napęd elektryczny
silnik spalinowy
criterion
weight
performance
membership function
function reference
environmental pollution
electric motor
internal combustion engine
Opis:
W artykule przedstawiono analizę samochodów napędzanych silnikiem spalinowym oraz silnikiem elektrycznym ze względu na podstawowe parametry techniczne oraz skażenie środowiska. Ponieważ kryteria oceny pojazdów są zarówno kryteriami ilościowymi, jak i jakościowymi, posłużono się teorią zbiorów rozmytych. Na tej podstawie utworzono model rozmyty analizy porównawczej pojazdów.
This paper presents an analysis of the internal combustion engine-powered vehicles and power because of the basic technical and environmental pollution. Since the criteria for assessing the vehicles are both quantitative criteria and qualitative, were used in the theory of fuzzy sets. On this basis, established a comparative analysis of fuzzy model vehicles.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2014, 68; 153-169
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
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