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Tytuł:
A Cross-sectional Analysis of the Challenges Faced by Hungarian Women’s First Division Football Teams Based on Coaches and Players Statistics
Przekrojowa analiza wyzwań stojących przed węgierskimi kobiecymi drużynami piłkarskimi w pierwszej lidze na podstawie statystyk trenerów i zawodniczek
Autorzy:
Tóth, Dorottya
Ács, Pongrác
Derkács, Evelin
Prémusz, Viktória
Krutek, László
Szabó, Zoltán
Filó, Csilla
Elbert, Gábor
Powiązania:
https://bibliotekanauki.pl/articles/2159209.pdf
Data publikacji:
2022-12-30
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
women’s football
football players
soccer
coaching
football
coach
piłka nożna kobiet
piłkarze
piłka nożna
trener
Opis:
Background. The current situation experienced by football clubs in the Hungarian women’s first division was analyzed. It was assumed that: one of the obstacles for the development is the presence of non-skilled sports experts (H1); all the foreign players achieve better results than the Hungarians (H2); and the foreign players are older than the Hungarians on average (H3). Material and methods. In this study, the qualifications of the coaches in women’s football were compared with those in the men’s first division. The number of games played, performance statistics and average age amongst the players were studied as well. The data was analyzed using crosstab and two sample T-tests. Results. H1 was confirmed by T-test and the significant result between the two groups was p=0.00. H2 was confirmed as well: the performance analysis was significant and the foreign players achieve better results (p=0.001). The Hungarian players have better results in terms of the number of games, the number of performances in the starting lineup and the number of seasons played in the first division. Conclusions. The examined problems in Hungarian women’s football have been proven. All the areas of women’s football considered in this study require development, especially in terms of the academic qualities of the coaches, which widely affect the team’ performance.
Wprowadzenie. Przeanalizowano obecną sytuację, jakiej doświadczają kluby piłkarskie w węgierskiej pierwszej lidze kobiet. Założono, że jedną z przeszkód w rozwoju jest obecność niewykwalifikowanych ekspertów sportowych (H1), że wszystkie zagraniczne zawodniczki osiągają lepsze wyniki niż Węgierki (H2), a także, że zawodniczki zagraniczne są średnio starsze niż Węgierki (H3). Materiał i metody. W niniejszym badaniu porównano kwalifikacje trenerów w piłce nożnej kobiet z kwalifikacjami ich odpowiedników w pierwszej lidze męskiej. Przeanalizowano również liczbę rozegranych spotkań, statystykę występów i średnią wieku wśród zawodniczek. Dane analizowano za pomocą crosstab oraz T-testów do porównania obu grup. Wyniki. H1 potwierdzono T-testem, a wynik istotny pomiędzy obiema grupami wynosił p=0.00. H2 zostało również potwierdzone: analiza rozegranych spotkań dała istotny wynik, a zagraniczne zawodniczki osiągnęły lepsze wyniki (p=0.001). Węgierki uzyskały lepsze wyniki pod względem liczby rozegranych meczy, obecności w pierwszym składzie oraz liczby sezonów rozegranych w pierwszej lidze. Wnioski. Badane problemy w węgierskiej piłce nożnej kobiet zostały potwierdzone. Wszystkie przeanalizowane w niniejszym badaniu obszary piłki nożnej kobiet wymagają rozwoju, szczególnie w zakresie kwalifikacji naukowych trenerów, które w dużym stopniu wpływają na wyniki drużyn.
Źródło:
Health Problems of Civilization; 2022, 16, 4; 360-368
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A general framework of agent-based simulation for analyzing behavior of players in games
Autorzy:
Nishizaki, I.
Powiązania:
https://bibliotekanauki.pl/articles/308559.pdf
Data publikacji:
2007
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
artificial adaptive agents
simulation
games
behavior of players
Opis:
In this paper, we give a general framework of agent-based simulation for analyzing behavior of players in various types of games. In our simulation model, artificial adaptive agents have a mechanism of decision making and learning based on neural networks and genetic algorithms. The synaptic weights and thresholds characterizing the neural network of an artificial agent are revised in order that the artificial agent obtains larger payoffs through a genetic algorithm. The proposed framework is illustrated with two examples, and, by giving some simulation result, we demonstrate availability of the simulation analysis by the proposed framework of agent-based simulation, from which a wide variety of simulation settings can be easily implemented and detailed data and statistics are obtained.
Źródło:
Journal of Telecommunications and Information Technology; 2007, 4; 28-35
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new hand dynamometer activforce isometric muscle activation on single joint muscle force of volleyball players
Autorzy:
Kahraman, Yeliz
Powiązania:
https://bibliotekanauki.pl/articles/34671012.pdf
Data publikacji:
2024-02-23
Wydawca:
Akademia Tarnowska
Tematy:
isometric force
peak
average
volleyball players
Opis:
Isometric muscle activation of single joint to volleyball players is critic on sport performance to produce potential muscle force, however isometric measurement limited in isokinetic muscle activity measurement of volleyball players. Indeed, hand dynamometers commonly use in various body isometric force. Professional volleyball players age 16.23 ± 0.59 yr, body mass 60.22 ± 4.64 kg, hight 1.69 ± 0.04 m participated to peak and average isometric force measurement over 8 week pre and post test. Accordingly, single joint muscle force production measurement of volleyball players tested on isometric muscle activation using a new hand dynamometer activforce 2. Isometric muscle activation tests consisted of 24 body region from upper and lower compartment. For this isometric muscle action test detected on peak force outcomes (SEM: 37.90; CV: 1.79) and average force outcomes (SEM: 33.62; CV: 1.84). The high isometric muscle action joint loading performing mechanical test application recommended on athletic population to using isometric potential high contraction model by strength training performance separately in-season and off-season measurement modeling. Conclusion, peak and average force production progressive isometric modeling of volleyball athletes worked to current sport–health condition. As out, conclusion must be advanced isometric force measurement proper work in sport-specific tasks. The proper isometric force must be repeat sport performance outcome in different sport modalities.
Źródło:
Health Promotion & Physical Activity; 2023, 25, 4; 22-30
2544-9117
Pojawia się w:
Health Promotion & Physical Activity
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Abstrakcyjna kontrola konstytucyjności – 25 lat doświadczeń Najwyższego Sądu Federacji Brazylii
Autorzy:
de Limas Tomio, Fabricio Ricardo
Robl Filho, Ilton Norberto
Powiązania:
https://bibliotekanauki.pl/articles/524535.pdf
Data publikacji:
2014-10-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
Brazylijski Federalny Sąd Najwyższy (STF)
kontrola sądowa
podmioty polityczne
Brazilian Supreme Federal Court (STF)
judicial review
institutional/collective veto players
Opis:
Artykuł podejmuje temat scentralizowanej i abstrakcyjnej kontroli konstytucyjności dokonywanej przez Federalny Sąd Najwyższy Brazylii oraz metody i teoretyczne podejścia w zakresie empirycznych badań procesu podejmowania decyzji i interpretacji prawa. Artykuł obejmuje swoim zakresem badanie 5011 decyzji Sądu podjętych w latach 1988–2013, przyjmując cztery wzajemnie się wykluczające hipotezy: H1) Sąd w procesie podejmowa-nia decyzji o niekonstytucyjności przyjmuje rolę veto player (podmiotu, bez którego zgody nie można dokonać zmiany status quo), zwiększając polityczną stabilność poprzez redukowanie znaczenia wyboru większości i eksponowanie istoty jednomyślności, H2) sąd konstytucyjny nie jest podmiotem o randze veto player, ponieważ instytucjonalnie proces powoływania sędziów sądu wskazuje na absorbowanie przez sąd roli innych veto players w procesie kontroli, a w konsekwencji: H3) liczba podmiotów uprawnionych do wszczynania postępowania przed sądem wpływa na zwiększenie stabilności prowadzonej polityki i redukuje znaczenie obranych celów polityki rządzącej większości oraz H4) liczba tych podmiotów wyznacza wzrost stabilizacji polityki stanów w federacji i pozostaje bez szkody dla polityki federalnej. W konkluzji, będącej efektem rozległych badań empirycznych, autorzy znajdują potwierdzenie hipotezy pierwszej (H1) w procesie podejmowania decyzji na poziomie stanowym i nieco mniej na poziomie federalnym, odrzucając częściowo hipotezę drugą (H2). Wskazują także, badając strukturę podmiotów składających wnioski do sądu o badanie konstytucyjności, że sądowa kontrola jest używana przez mniejszości w celu wskazania swojej politycznej pozycji i zwiększenia szans na sukces wyborczy w przyszłości (H3). Sądowa kontrola jest skierowana na wzrost stabilności polityki stanów, redukując rolę większości w decentralizacji władzy państwa federacyjnego (H4).
This paper analyzes judicial review (concentrated and abstract) exercised by the Brazilian Federal Supreme Court (STF) and the methods for and theories that allow an empirical approach to this phenomenon as a decision-making process, making use of political institutions (distribution of powers and competences) and legal interpretation (legal literature and concepts). The institutional context of the decision-making process assigned by the Brazilian Constitution to the Federal Supreme Court (STF) makes it act by means of concentrated judicial review, ascribing to it the power to judge the constitutionality of federal and state law or normative acts, judicially reviewing these norms. The objective of this study is to determine the role of judicial review and the extent of concentrated judicial review, using as empirical basis the decisions of the Supreme Court in 5011 Direct Actions of Unconstitutionality (ADIs), adjudicated between 1988 and 2013. In the empirical test, there are the following main and mutually exclusive hypotheses: H1- Judicial review adds an institutional collective veto player in decision-making (institutional analysis), increasing policy stability while reducing size the winning set of the status quo or expanding the core of unanimity; H2- Judicial review does not add an institutional/collective veto player, because, institutionally, the constitutional design and the process of appointment of the members of STF indicates the validity of the absorption rule of the Court in concentrated judicial review by other veto players. Secondly, there are the following hypotheses: H3 – The number of legitimized plaintiffs for the petition of judicial review cases (ADI) increases policy stability and reduces importance of agenda setting and decision-making capacity of majority coalitions in decision making; H4 – The number of legitimate plaintiffs for the petition of judicializing measures increases the state/federative policy stability and is innocuous to federal policy stability and decision-making. Conclusions: The data demonstrates that H1 is supported in federative/state decision-making and little evident national level, partially refuting H2. However, given the number of legitimized plaintiffs, the massive introduction of judicializing measures at the national level indicates that judicial review is used by minorities as signaling for political positioning and maximizing future electoral opportunities without effectively restricting government (H3). Judicial review is directed preferentially to increase federative/state policy stability, reducing the role of opposition majorities or restricting decisions to extend the federal decentralization by state decision making (H4).
Źródło:
Przegląd Prawa Konstytucyjnego; 2014, 5 (21); 11-37
2082-1212
Pojawia się w:
Przegląd Prawa Konstytucyjnego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acute effects of weighted plyometric exercise on sprint, agility and jump performance in university football players
Autorzy:
MH, Haris
Khan, Moazzam Hussain
Tanwar, Tarushi
Irshad, Nida
Nuhmani, Shibili
Powiązania:
https://bibliotekanauki.pl/articles/1925631.pdf
Data publikacji:
2021-01-06
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
weighted plyometric
plyometric exercise
agility
jump
university football players
Opis:
Background: Conditioning activities such as resistance training can cause excitation of central nervous system resulting in Post-activation Potentiation phenomenon. Plyometric exercise also has an important role to develop Post-activation Potentiation following a resistance stimulus. So the purpose the study was to investigate the immediate effects of weighted plyometric exercise on sprint, agility and jump performance. Materials and methods: Twenty male university football players (age=21.3±1.5 years, body mass=63.3±9.5 kg, height=169.8±6.4 m) participated in this Single group pre-test post-test study. Agility Time (AT), Sprint Time (ST) and Counter-Movement Jump (CMJ) height were measured prior to and 1st and 5th minutes following plyometric exercise. Results: A repeated measures ANOVA employed at baseline (T0), 1 minute (T1), and 5 minutes (T5) post intervention showed significant effect for all the three outcome measures (p<0.001). Post-hoc Bonferroni pairwise comparison showed a significant decrease in both AT and ST from baseline to assessments at both T1 (p<0.001) and T5 (p<0.001), whereas there was a significant increase in the CMJ height. However, no statistical difference was found between T1 and T5 (p=0.058) in ST, but AT was significantly lower at T5 than at T1 (p=0.008), and CMJ height showed significant increase from T1 to T5 (p=0.001). Conclusion: Our results suggest that weighted plyometric exercises have an acute response on sprint, agility and counter movement jump (CMJ Height) following Post-Activation Potentiation (PAP) effect developed after plyometric exercises.
Źródło:
Physical Activity Review; 2021, 1, 9; 1-8
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aggression Replacement Training (ART) as an effective method of coping with aggression – results of an experimental study with junior high school computer gamers
Autorzy:
Mikolajewska, Izabela
Mikolajewska, Agata
Powiązania:
https://bibliotekanauki.pl/articles/45439404.pdf
Data publikacji:
2024-01-14
Wydawca:
Akademia Pedagogiki Specjalnej im. Marii Grzegorzewskiej. Wydawnictwo APS
Tematy:
computer players
culture of computer gaming
electronic aggression
resilience
aggression replacement training
Opis:
The aim of the article is to present research findings focused on exploring effective methods for coping with challenging situations experienced by gamers during gameplay. The identification of difficulties associated with the occurrence of antisocial behaviors in the form of electronic aggression (e.g., retarding, chat-based verbal abuse) aligns the conducted research with the positive concept of prevention- resilience. According to this concept, the development of an individual’s social competence determines their positive functioning in society. The study used the cognitive-behavioral method of Aggression Replacement Training, respecting its high effectiveness in other countries. Equipping gamers with social skills (e.g., dealing with accusations of cheating in games) appears to be an efficient method in supporting the development of their resilience. The experiment was conducted among junior high school computer gamers (N=48), selected from a pool of 114 individuals; and it explored the role of ART in students’ coping strategies during challenging situations.
Źródło:
International Journal of Pedagogy, Innovation and New Technologies; 2023, 10, 2; 66-74
2392-0092
Pojawia się w:
International Journal of Pedagogy, Innovation and New Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anaerobic performance in 30s Wingate test as one of the possible criteria for selection Czech hockey players into National Hockey League
Autorzy:
Heller, Jan
Vodicka, Pavel
Janek, Michael
Powiązania:
https://bibliotekanauki.pl/articles/1921992.pdf
Data publikacji:
2019-03-20
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
anaerobic capacity
anaerobic power
National Hockey League
professional ice hockey players
Wingate test
Opis:
The selection into the National Hockey League (NHL) is based on criteria reflecting job analysis of a professional ice hockey player and the requirements of the game. Only few Czech elite ice hockey players succeed to participate in NHL and their number is decreasing in the last decade. Aim of Study: The aim of the study was to find out and evaluate the level of anaerobic readiness of Czech hockey forwards and defenders playing in the NHL and to compare their anaerobic performance with that in elite national hockey players from the Czech extra-league. Material and Methods: Results of 30s Wingate anaerobic test obtained in 26 forwards and 16 defenders, Czech hockey players from the NHL (from 2001/2002 to 2015/2016 seasons) were compared with the reference values of elite Czech ice hockey players. The comparison was based on the mean values, rate of dispersion, and effect sizes were calculated using Cohen's d coefficient. Results: In forwards, both absolute and relative values of peak power (PP) and anaerobic capacity (AnC) found in Czech players in NHL were higher (d>1) than in elite Czech national players. In defenders, only the value of AnC relative to body mass showed small effect (d=0.36), but absolute and relative values of PP and absolute value of AnC were higher (d>1) than in elite Czech national players. Conclusion: The results of the study indicate that anaerobic readiness evaluated by 30s Wingate test may be, besides dominant on-ice skills, one of the criteria for entry to the top ice hockey competition.
Źródło:
Physical Activity Review; 2019, 7; 57-62
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analyzing the Possibility of Modeling the Specificity of an Individual Stock Market Investors Behavior
Analiza możliwości modelowania specyfiki zachowań giełdowych inwestorów masowych
Autorzy:
Michałowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/305887.pdf
Data publikacji:
2011
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
giełda
inwestorzy masowi
modele zachowań
wieloosobowa gra kooperacyjna
gra z kontinuum graczy
użyteczność oczekiwana
stock market investors
mass investors
models of behavior
cooperative many-player game
game with a continuum of players
expected utility
Opis:
The paper presents various methods of modeling an individual stock market investors' behavior. The author analyzed the possibility of using approaches related to the theory of expected utility, prospect theory, game theory and other studies on this subject. The article is the result of efforts to create an adequate model in order to investigate the specificity of the decision-making behavior of the so-called individual stock market investors.
W artykule przedstawiono różne metody modelowania zachowań giełdowych inwestorów masowych. Dokonano analizy możliwości wykorzystania podejść związanych z teorią oczekiwanej użyteczności, teorią perspektyw, z teorią gier oraz inne badania dotyczące tego tematu. Artykuł jest wynikiem prac nad opracowaniem adekwatnego modelu pozwalającego badać specyfikę zachowań decyzyjnych tzw. giełdowych inwestorów masowych.
Źródło:
Biuletyn Instytutu Systemów Informatycznych; 2011, 8; 53-58
1508-4183
Pojawia się w:
Biuletyn Instytutu Systemów Informatycznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of force-length curve for determination of leg stiffness during a vertical jump
Autorzy:
Struzik, A.
Zawadzki, J.
Powiązania:
https://bibliotekanauki.pl/articles/306593.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
asymetria
sprężystość
kwazizerowa sztywność
koszykówka
asymmetry
countermovement jump
elasticity
quasi-stiffness
basketball players
Opis:
Purpose: The aim of this study was to present the methodology for estimation of a leg stiffness during a countermovement jump. The question was asked whether leg stiffness in the countermovement and take-off phases are similar to each other as demonstrated in previous reports. It was also examined whether the stiffness in left lower limb is similar to the one in right lower limb. Methods: The research was conducted on 35 basketball players. Each participant performed three countermovement jumps with arm swing to the maximum height. Measurements employed a Kistlerforce plate and a BTS SMART system for motion analysis. Leg stiffness (understood as an inclination of the curve of ground reaction forces vs. length) was computed for these parts of countermovement and take-off phases where its value was relatively constant and F(∆l) relationship was similar to linear. Results: Mean value (±SD) of total stiffness of both lower limbs in the countermovement phase was 7.1 ± 2.3 kN/m, whereas this value in the take-off phase was 7.5 ± 1 kN/m. No statistically significant differences were found between the leg stiffness in the countermovement and the take-off phases. No statistically significant differences were found during the comparison of the stiffness in the right and left lower limb. Conclusions: The calculation methodology allows us to estimate the value of leg stiffness based on the actual shape of F(∆l) curve rather than on extreme values of ∆F and ∆l. Despite different tasks of the countermovement and the take-off phases, leg stiffness in these phases is very similar. Leg stiffness during a single vertical jump maintains a relatively constant value in the parts with a small value of acceleration.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 2; 163-171
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in electromyographic signals and skin temperature during standardised effort in volleyball players
Autorzy:
Kuniszyk-Jóźkowiak, W.
Jaszczuk, J.
Czaplicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/307133.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
termografia
zmienność temperatury
siatkówka
sygnał elektromiograficzny
thermography
temperature variability
volleyball players
electromyographic signals
standardised effort
Opis:
The state of athletes’ muscles is not constant, but it differs depending on the stage of sports training, which is associated with different degrees of muscle fatigue. There is thus a need to find a non-invasive and simple method to assess muscle fatigue. The aim of the study was to determine the relationship between muscle fatigue due to physical effort and changes in skin temperature, measured using a thermographic camera. Methods: The study involved 12 volleyball players. The participants were to maintain 70% of peak torque in the joint for as long as possible. We measured peak torque and the time of maintaining 70% of its value (tlim) as well as continuously recording skin temperature and electromyographic (EMG) signals in the region of the belly of the rectus femoris. The measurements were taken twice: before and after a series of squats. Results: The study found that tlim decreased when isometric contraction was performed after physical effort. Pre- and post-exercise skin temperature did not differ significantly, however, the increase rates of temperature and the root mean square (RMS) of the EMG signals grew significantly. In most of the players, skin temperature also correlated with the RMS, median frequency (MDF), and mean frequency (MF) of the EMG signals. Conclusions: Measuring the time of maintaining submaximal torque during isometric contraction and the slope coefficient for the increase in temperature recorded using a thermographic camera can be a simple, cost-effective, and non-invasive method of assessing fatigue and efficiency decreases in the muscles in volleyball players.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 3; 115-122
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coordinated production, ordering, shipment and pricing model for supplier-retailer inventory system under trade credit
Autorzy:
Shah, Nita H.
Naik, Monika K.
Powiązania:
https://bibliotekanauki.pl/articles/406551.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
defective item
production inventory system
supply chain of two players
time-price
credit
dependent demand
element uszkodzony
system inwentaryzacji produkcji
łańcuch dostaw
kredyt
popyt zależny
Opis:
The objective of this article is to maximize the joint profit for supplier and retailer by constructing a combined supplier–retailer inventory model wherein supplier and retailer both have implemented trade credit policies, and some defective items are received by the retailer. The customer’s demand is expressed as a function of time, price and credit period, which is appropriate for the products for which demand increases initially and after some time it starts to decrease. Production, directly proportional to the customer’s demand rate, is considered as one of the decision variables for the purpose of reducing the holding cost of the supplier. The article estimates the optimum replenishment cycle, customer’s credit period, retail selling price by a classical optimization technique. For validation of the derived model, various numerical examples are demonstrated. Finally, implementing sensitivity analysis on the decision variables by varying the inventory parameters, effective managerial insights are generated which is beneficial for the players of supply chain by practically gaining the maximum joint profit through advising to opt for the case N ≤ M ≤ T , i.e., when the customer’s trade credit period offered by the retailer is lesser than the retailer’s trade credit period offered by the supplier and which is lesser than the replenishment cycle length.
Źródło:
Operations Research and Decisions; 2019, 29, 2; 55-76
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czynniki determinujące wartość rynkową piłkarzy na przykładzie zawodników polskiej Ekstraklasy
Factors Determining the Market Value of Football Players on the Example of Ekstraklasa
Autorzy:
Leksowski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/21492258.pdf
Data publikacji:
2022-06-04
Wydawca:
Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania
Tematy:
wartość rynkowa
wycena piłkarzy
wyniki sportowe
konkurencja rynkowa
rynek międzynarodowy
market value
players valuation
sports results
market competition
international
market
Opis:
Celem artykułu jest odpowiedź na pytanie, jakie czynniki determinują wartość rynkową piłkarzy oraz jaki jest wpływ poszczególnych czynników na rynkową wycenę zawodników w klubach Ekstraklasy. Za pomocą regresji liniowej wyznaczone zostały parametry modeli określających wpływ poszczególnych zmiennych egzogenicznych na wartość rynkową piłkarzy w klubach Ekstraklasy. Wyniki analizy przeprowadzonej metodą regresji liniowej wskazują na istotny, pozytywny związek między wartością rynkową piłkarzy a wynikami klubów w rozgrywkach krajowych i międzynarodowych. Wydatki na transfery klubów Ekstraklasy okazały się negatywnie skorelowane z rynkową wyceną piłkarzy znajdujących się aktualnie w kadrach analizowanych klubów. Ponadto, wydatki na wynagrodzenia i przychody okazały się pozytywnie skorelowane z wartością rynkową kadry w klubach Ekstraklasy. Ważnym czynnikiem, który ma istotny wpływ na wartość zawodników jest także ich wiek. Najbardziej cennymi zawodnikami są piłkarze posiadający doświadczenie na najwyższym poziomie rozgrywkowym, mający jednocześnie przed sobą wiele lat profesjonalnej kariery piłkarskiej. Aby w sposób prawidłowy ocenić wartość rynkową piłkarzy, należy wziąć pod uwagę wiele czynników mogących potencjalnie wpłynąć na ich wycenę. Model biznesowy stosowany przez kluby Ekstraklasy w znaczący sposób różni się od klubów z czołowych lig europejskich, szczególnie należących do ligowej czołówki. Najbardziej skutecznym sposobem pozyskania piłkarza o wysokiej wartości rynkowej jest inwestowanie w rozwój młodych, utalentowanych polskich piłkarzy o wysokim potencjale sprzedażowym. Artykuł stanowi rozwinięcie badań nad czynnikami determinującymi wartość rynkową piłkarzy, uwzględniając wiele zmiennych, które nie zostały do tej pory w pełni zweryfikowane. Badanie wyróżnia także zakres czasowy, obejmujący 15 sezonów polskiej Ekstraklasy. Kompleksowe podejście pozwala określić główne tendencje w kształtowaniu polskiego rynku piłkarskiego na przestrzeni ostatnich kilkunastu lat.
The aim of the study is to answer the question of what factors determine the market value of players and what is their impact on the market valuation of players in Ekstraklasa clubs. Using linear regression, the parameters of the models determining the impact of individual exogenous variables on the market value of footballers in Ekstraklasa clubs were determined. The results of the analysis indicate a significant, positive relationship between the market value of players and the results of clubs in national and international competitions. The expenses on transfers of Ekstraklasa clubs turned out to be negatively correlated with the market valuation of players. Moreover, expenses on salaries and revenues turned out to be positively correlated with the market value of the players in Ekstraklasa clubs. An important factor that has a significant impact on the value of players is also their age. The most valuable players are players with experience at the highest level of competition, who at the same time have many years of professional football career ahead of them. In order to correctly assess the market value of footballers, many factors that could potentially affect their valuation should be taken into account. The business model used by Ekstraklasa clubs is significantly different from those of the leading European leagues, especially those belonging to the top league. The most effective way to find a player with high market value is to invest in the development of young, talented Polish players with high sales potential. The article is an extension of the research on the factors determining the market value of footballers, taking into account many variables that have not been fully verified so far. The study also distinguishes the time span, covering 15 seasons of the Ekstraklasa. A comprehensive approach allows for identifying the main trends in shaping the Polish football market.
Źródło:
Studia i Materiały; 2022, 1(36); 54-68
1733-9758
Pojawia się w:
Studia i Materiały
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deep tissue massage and flexibility in the structural components of the superficial back line of professional volleyball players: a pilot study.
Autorzy:
Steuer, M.
Jędrzejewski, G.
Dolibog, P.
Kasper-Jędrzejewska, M.
Mroczek, A.
Kaczorowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/2088234.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Opolski. Instytut Nauk o Zdrowiu
Tematy:
deep tissue massage
superficial back line
volleyball players
Opis:
Background: Massage is a common treatment in physiotherapy, often used as a prophylaxis or during recovery following a musculoskeletal contusion. One form of therapeutic massage is deep tissue massage (DTM), which has become more popular in recent years as a way of performing targeted work with the myofascial system. Aim of the study: The aim of the study was to examine the effectiveness of deep tissue massage on superficial back line flexibility (hip flexion and knee extension range of motion – ROM). Material and methods: Elite volleyball players (n=15), age: 22.8 ± 4.41 years; mass: 82.67 ± 6.99 kg; height: 1.96 ± 0.08 m) were recruited for this study. Deep tissue massage of the myofascial superficial back line was performed from the plantar fascia through the gastrocnemius and soleus muscles, the hamstrings to the ischial tuberosity (based on Myers, 2014). Hip flexion and knee extension ROM were measured at rest both before and after DTM. The Wilcoxon signed-rank test was used to compare pre and post values during the intervention. Results: Following deep tissue massage, there was significant improvement in superficial back line flexibility, demonstrated by an increase in hip flexion angle compared to pre-DTM values in both lower limbs. Right lower limb pre-DTM 1.86±0.66; post 2.79±0.43 (p<0.005), left lower limb pre-DTM 2.36±0.74; post 2.79±0.43 (p<0.028). There was also significant improvement in superficial back line flexibility demonstrated by an increase in knee extension angle post-DTM in both lower limbs. Right lower limb pre-DTM 69.79°±10.8; post 81.43°±6.06, left lower limb pre-DTM 73.07°±11.45, post 82.50°±8.39). Conclusions: Deep tissue massage increases the flexibility of the superficial back line and can be used as a form of increasing range of motion in the hips and knees.
Źródło:
Medical Science Pulse; 2019, 13, 3; 29-34
2544-1558
2544-1620
Pojawia się w:
Medical Science Pulse
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
E-sport och den svenska kulturen
E-sports and Swedish Culture
Autorzy:
Kawińska, Angela
Powiązania:
https://bibliotekanauki.pl/articles/970302.pdf
Data publikacji:
2019-12-13
Wydawca:
Uniwersytet Gdański. Wydział Filologiczny
Tematy:
e-sports
electronic sports
players
svensk e-sports code of conduct
computer games
e-sport
elektronisk sport
spelare
dataspel
Opis:
The aim of this study is to familiarize readers with the term e-sports and to show the influence which selected elements of Swedish culture have had on it. The article explores the definition of e-sports, its history and actual state. I concentrated especially on a document named the Svensk e-sports Code of Conduct. Rules and tips contained in this document were made and gathered in order to support an open and welcoming environment in e-sports.
Źródło:
Studia Scandinavica; 2019, 3, 23; 133-149
2657-6740
Pojawia się w:
Studia Scandinavica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Variable-Intensity Running Training and Circuit Training on Selected Physiological Parameters of Soccer Players
Autorzy:
Ambroży, Tadeusz
Nowak, Mateusz
Omorczyk, Jarosław
Wrześniewski, Krzysztof
Ozimek, Mariusz
Duda, Henryk
Mucha, Dawid
Ceranowicz, Piotr
Pałka, Tomasz
Stanula, Arkadiusz
Mucha, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/1030576.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
circuit training
physiological parameters
soccer players
variable-intensity running training
Opis:
Proper planning of the training process based on individual LT and AT metabolic thresholds is essential to improve athletic performance. Development of endurance in soccer players is mainly based on continuous runs and variable-intensity runs, supplemented with strength conditioning and sport-specific training. The aim of the study was to analyse selected parameters of physical capacity of soccer players after 8-week variable-intensity running training and circuit training. The experiment was carried out in a group of 34 soccer players aged 21 to 26 years. The athletes were divided into two groups: 17 people in the experimental group and 17 people in the control group. The experimental group was involved in 30-minute tempo runs two times a week for 8 weeks with variable intensity at AT. In the same period, the control group performed two 60-minute continuous runs at the intensity of 70-75%HRmax. The determination of metabolic thresholds used two indirect tests: the multistage shuttle run test (beep test) and maximal lactate steady state test (MLSS) with author's own modification. In order to evaluate maximal heart rate (HRmax), the research procedure was started from the beep test (distance: 20 m). The speed at the first level was 8.5 km/h and increased with each level by 0.5 km/h. Training of the experimental group where variable exercise intensity was used caused a statistically significant increase in HRmax (by 1.9%) and blood lactate levels at the AT (by 20.5%). The training in the experimental group led to the statistically significant (p < 0.05) increase in the parameters of the following variables: HRmax (by 1.9%); lactate level (by 7.85); HR at the AT (by 1,9%); lactate level at the AT (by 20.5%). The assumptions of the experimental training did not cause statistically significant changes in pretest vs. posttest HRmax and blood lactate levels for the LT. Endurance training with high intensity is more effective in soccer players compared to training with moderate intensity. Development of special endurance in soccer should also assume the intensity and method of working similar to the method used during sport competition.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2018, 23, 3; 25-35
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł

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