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Sample records for volleyball service test

  1. Development of a Valid Volleyball Skills Test Battery.

    Science.gov (United States)

    Bartlett, Jackie; And Others

    1991-01-01

    Describes the development of the North Carolina State University Volleyball Skills Test Battery which offers accurate measurement of three volleyball skills (serve, forearm pass, and set). When physical educators tested 313 students, the battery objectively measured their abilities, providing a gamelike means of teaching, testing, grouping, and…

  2. Development of a Valid Volleyball Skills Test Battery.

    Science.gov (United States)

    Bartlett, Jackie; And Others

    1991-01-01

    Describes the development of the North Carolina State University Volleyball Skills Test Battery which offers accurate measurement of three volleyball skills (serve, forearm pass, and set). When physical educators tested 313 students, the battery objectively measured their abilities, providing a gamelike means of teaching, testing, grouping, and…

  3. METRIC TESTS CHARACTERISTIC FOR ESTIMATING JUMPING FOR VOLLEYBALL PLAYERS

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    Toplica Stojanović

    2008-08-01

    Full Text Available With goal to establish metric tests characteristics for estimating jumping for volleyball players, it was organized a pilot research on pattern of 23 volleyball players from cadet team and 23 students from high-school. For needs of this research four tests are valid for estimation, jump in block with left and right leg and jump in spike with left and right leg. Each test has been taken three times, so that we could with test-re test method determine their reliability, and with factor analysis their validity. Data were processed by multivariate analysis (item analysis, factor analysis from statistical package „Statistica 6.0 for windows“. On the results of research and discussion we can say that the tests had high coefficient of reliability, as well as factor validity, and these tests can be used to estimate jumping for volleyball players.

  4. A MOTIVATIONAL APPROACH TO SERVICING SKILL TRAINING IN VOLLEYBALL

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    Levent İLHAN

    2009-12-01

    Full Text Available The purpose of this research is to determine whether the “note” factor, which is assessed as an outer motivation tool, is effective on servicing skill training or not.A total of 20 students including 12 male and 8 female students studying in physical education training department have participated in the research. The back section of the volleyball pitch is divided by a strip 3 meters before the service line and parallel to the service line, this section is divided into 3 parts with measurements of 3m x 3m and numbers of 1-6-5 is given to these sections with reference to the position numbers in volleyball. The students have been asked to make tennis service in accordance wtih the rules by determining targets. The period after their exercises of 15 minutes has been recorded to video in order to collect data. The application continued in 4 parts. 1.Part: the students have been asked to make service shoot to the sections numbered 1,6,5 respectively. 2.Part: the students have been asked to continue to make service shoots with the same order but this time we have mentioned that each shoot reaching to the target will lead to +5 points added to the servicing part of the midterm examination and they have been asked to make 3 shoots to each section which is a total of 9 shoots. The lesson is paused for 10 minutes and the third part has started. 3.Part: As a continuance of lessons the shoots continued without any awards. 4.Part: the awarding of +5 points per a successfull shoot, which is an independent variable, has started again and the shoots continued as in the 2. Part. As a consequence of image examinations, the first three shoots of the students have been examined in the 1st and 3rd parts; the shoots reaching to the target section including the lines are conisdered as successful (2 points, the shoots outside the pitch which are not in accordance with the rules are considered as unsuccessful (0 points and the balls falling into the pitch area

  5. Lateral Scapular Slide Test and Scapular Mobility in Volleyball Players

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    Ozunlu, Nihan; Tekeli, Hatice; Baltaci, Gul

    2011-01-01

    Context: The stability of the scapula in relation to the entire moving upper extremity is the key in the throwing sequence. The importance of scapular positioning in volleyball players has been well documented in the literature, but no one has compared scapular positioning between volleyball players and sedentary people. Objective: To compare measurements of scapular mobility obtained using the lateral scapular slide test between volleyball players and sedentary participants without shoulder impairments and to compare changes in scapular mobility in players according to the number of years of sport participation. Design: Cross-sectional study. Setting: University research laboratory. Patients or Other Participants: A total of 121 people at a single university volunteered. Of these, 67 were sedentary (age = 24.3 ± 2.34 years, height = 1.69 ± 0.09 m, mass = 65.1 ± 11.91 kg); 54 were volleyball players from 4 professional teams and were separated into 2 groups according to their years of sport participation. The first group was named young players (n = 31; age = 17.7 ± 2.58 years, height = 1.83 ± 0.10 m, mass = 68.3 ± 12.21 kg, sport participation ≤ 9 years), and the second group was named old players (n = 23; age = 26.9 ± 3.39 years, height = 1.95 ± 4.38 m, mass = 90.7 ± 5.75 kg, sport participation ≥ 10 years). Main Outcome Measure(s): Study participants completed a rating scale for pain and a questionnaire about demographic and shoulder problems. One assessor performed the lateral scapular slide test and additional flexibility measurements around the shoulder girdle. Flexibility (external rotation, internal rotation) and scapular position (1, 2, 3) were compared among groups (young players, old players, sedentary people) and between sides (dominant, nondominant). Results: In sedentary participants, we found differences for position 1 (t66 = 3.327, P = .002), position 2 (t66 = 2.491, P = .004), position 3 (t66 = 2.512, P = .006), and internal rotation

  6. Physiologic performance test differences in female volleyball athletes by competition level and player position.

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    Schaal, Monique; Ransdell, Lynda B; Simonson, Shawn R; Gao, Yong

    2013-07-01

    The purpose of this study was to examine physiologic performance test differences by competition level (high school and Division-I collegiate athletes) and player position (hitter, setter, defensive specialist) in 4 volleyball-related tests. A secondary purpose was to establish whether a 150-yd shuttle could be used as a field test to assess anaerobic capacity. Female participants from 4 varsity high school volleyball teams (n = 27) and 2 Division-I collegiate volleyball teams (n = 26) were recruited for the study. Participants completed 4 performance-based field tests (vertical jump, agility T-test, and 150- and 300-yd shuttle runs) after completing a standardized dynamic warm-up. A 2-way multivariate analysis of variance with Bonferroni post hoc adjustments (when appropriate) and effect sizes were used for the analyses. The most important findings of this study were that (a) college volleyball athletes were older, heavier, and taller than high school athletes; (b) high school athletes had performance deficiencies in vertical jump/lower-body power, agility, and anaerobic fitness; (c) lower-body power was the only statistically significant difference in the performance test measures by player position; and (d) the correlation between the 150- and 300-yd shuttle was moderate (r = 0.488). Female high school volleyball players may enhance their ability to play collegiate volleyball by improving their vertical jump, lower-body power, agility, and anaerobic fitness. Furthermore, all player positions should emphasize lower-body power conditioning. These physical test scores provide baseline performance scores that should help strength and conditioning coaches create programs that will address deficits in female volleyball player performance, especially as they transition from high school to college.

  7. Vertical jumping tests in volleyball: reliability, validity, and playing-position specifics.

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    Sattler, Tine; Sekulic, Damir; Hadzic, Vedran; Uljevic, Ognjen; Dervisevic, Edvin

    2012-06-01

    Vertical jumping is known to be important in volleyball, and jumping performance tests are frequently studied for their reliability and validity. However, most studies concerning jumping in volleyball have dealt with standard rather than sport-specific jumping procedures and tests. The aims of this study, therefore, were (a) to determine the reliability and factorial validity of 2 volleyball-specific jumping tests, the block jump (BJ) test and the attack jump (AJ) test, relative to 2 frequently used and systematically validated jumping tests, the countermovement jump test and the squat jump test and (b) to establish volleyball position-specific differences in the jumping tests and simple anthropometric indices (body height [BH], body weight, and body mass index [BMI]). The BJ was performed from a defensive volleyball position, with the hands positioned in front of the chest. During an AJ, the players used a 2- to 3-step approach and performed a drop jump with an arm swing followed by a quick vertical jump. A total of 95 high-level volleyball players (all men) participated in this study. The reliability of the jumping tests ranged from 0.97 to 0.99 for Cronbach's alpha coefficients, from 0.93 to 0.97 for interitem correlation coefficients and from 2.1 to 2.8 for coefficients of variation. The highest reliability was found for the specific jumping tests. The factor analysis extracted one significant component, and all of the tests were highly intercorrelated. The analysis of variance with post hoc analysis showed significant differences between 5 playing positions in some of the jumping tests. In general, receivers had a greater jumping capacity, followed by libero players. The differences in jumping capacities should be emphasized vis-a-vis differences in the anthropometric measures of players, where middle hitters had higher BH and body weight, followed by opposite hitters and receivers, with no differences in the BMI between positions.

  8. Relationships Between Anaerobic Performance, Field Tests and Game Performance of Sitting Volleyball Players

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    Marszalek Jolanta

    2015-12-01

    Full Text Available The aim of this study was to evaluate relationships between anaerobic performance, field tests, game performance and anthropometric variables of sitting volleyball players. Twenty elite Polish sitting volleyball players were tested using the 30 s Wingate Anaerobic Test for arm crank ergometer and participated in six physical field tests. Heights in position to block and to spike, as well as arm reach were measured. Players were observed during the game on the court in terms of effectiveness of the serve, block, attack, receive and defense. Pearson analysis and the Spearman's rank correlation coefficient were used. The strongest correlations were found between the chest pass test and mean power and peak power (r=.846; p=.001 and r=.708; p=.0005, respectively, and also between the T-test and peak power (r= −.718; p=.001. Mean power correlated with the 3 m test (r= −.540; p=.014, the 5 m test (r= −.592; p=.006, and the T-test (r= −.582; p=.007. Peak power correlated with the 3 m test (r= −.632; p=.003, the 5 m test (r= −.613; p=.004, speed & agility (r= −.552; p=.012 and speed & endurance (r=−.546; p=.013. Significant correlations were observed between anthropometric parameters and anaerobic performance variables (p≤.001, and also between anthropometric parameters and field tests (p≤.05. Game performance and physical fitness of sitting volleyball players depended on their anthropometric variables: reach of arms, the position to block and to spike. The chest pass test could be used as a non-laboratory field test of anaerobic performance of sitting volleyball players.

  9. Relationships Among Two Repeated Activity Tests and Aerobic Fitness of Volleyball Players.

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    Meckel, Yoav; May-Rom, Moran; Ekshtien, Aya; Eisenstein, Tamir; Nemet, Dan; Eliakim, Alon

    2015-08-01

    The purpose of the study was to determine performance indices of a repeated sprint test (RST) and to examine their relationships with performance indices of a repeated jump test (RJT) and with aerobic fitness among trained volleyball players. Sixteen male volleyball players performed RST (6 × 30 m sprints), RJT (6 sets of 6 consecutive jumps), and an aerobic power test (20-m Shuttle Run Test). Performance indices for the RST and the RJT were (a) the ideal 30-m run time (IS), the total run time (TS) of the 6 sprints, and the performance decrement (PD) during the test and (b) the ideal jump height (IJ), the total jump height (TJ) of all the jumps, and the PD during the test, respectively. No significant correlations were found between performance indices of the RST and RJT. Significant correlations were found between PD, IS, and TS in the RST protocol and predicted peak V[Combining Dot Above]O2 (r = -0.60, -0.75, -0.77, respectively). No significant correlations were found between performance indices of the RJT (IJ, TJ, and PD) and peak V[Combining Dot Above]O2. The findings suggest that a selection of repeated activity test protocols should acknowledge the specific technique used in the sport, and that a distinct RJT, rather than the classic RST, is more appropriate for assessing the anaerobic capabilities of volleyball players. The findings also suggest that aerobic fitness plays only a minor role in performance maintenance throughout characteristic repeated jumping activity of a volleyball game.

  10. Plasma antioxidant responses and oxidative stress following a 20 meter shuttle run test in female volleyball players

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    Emre Özgür Bulduk

    2011-08-01

    Full Text Available The effect of physical exercise on oxidant stress and antioxidants has been investigated extensively in the last twenty years. Cells continuously produce free radicals under normal conditions during mitochondrial electron transport chain (ETC. Experimental studies have shown elevated metabolic rate by strenuous physical exercise induces oxidative stress and production of excessive amounts of free radicals. Lipid peroxidation occurs when free radicals react with cellular components involving polyunsaturated fatty acid residues of phospholipids which are very sensitive to oxidation. This study aimed to determine plasma antioxidant responses and oxidative stress following a 20 meter shuttle run test in female volleyball players. Ten female volleyball players from the same team, and ten sedentary female ages between 18-24 years old volunteered to participate in this study. They were in good health and 48 hours before the test did not receive any drug or alcohol. None of them had any endocrine, orthopedic problems. Before the study, Informed, written consent was obtained from all the participants after full explanation of the procedures involved. All procedures were approved by the Selçuk University Meram Medical School of Ethical Committee. 20 meter shuttle run test was designed to estimate the maximal aerobic power of athletes performing in sports with frequent stops and starts (eg. Basketball, volleyball, fencing and so on. Findings of our study demonstrate that in both female groups 20 meter shuttle run test leads to production of more reactive oxygen species than the antioxidant systems can scavenge. Decrease in the activities of these antioxidant enzymes may be due to their inactivation caused by the higher production of the free radicals. it seems that the vulnerability of the body to oxidative stress is significantly enhanced after strenuous exercise test.

  11. Volleyball. August 1975 - August 1977.

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    Polvino, Geri, Ed.

    This guide is part of a series published by the National Association for Girls and Women in Sport. It contains 16 articles written on various aspects of volleyball, such as (1) volleyball visual aids, (2) a volleyball bibliography, (3) training for volleyball, (4) key visual cues in volleyball, (5) basic agility for beginners, and (6) solving…

  12. Evaluation of the body bearing of high performance female volleyball players

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    Stech M.

    2010-09-01

    Full Text Available In the present paper the results of the study of body bearing in 12 high performance female volleyball players of polish team (TPS Rumia are presented. To estimate body bearing the New-York's test of the body bearing classification was used. The results of the study have shown that asymmetrical positions of volleyball players in the time of services and attacks are contributed to formed some asymmetrical disturbances of body bearing. At the majority of sportsmen it is exhibited in omitting the left brachium and the left blade, in a right-hand scoliosis, in the tendency to a platypodia. It requires use of special preventive and adjusting exercises.

  13. Test-retest reliability and agreement of the SPI-Questionnaire to detect symptoms of digital ischemia in elite volleyball players.

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    van de Pol, Daan; Zacharian, Tigran; Maas, Mario; Kuijer, P Paul F M

    2017-06-01

    The Shoulder posterior circumflex humeral artery Pathology and digital Ischemia - questionnaire (SPI-Q) has been developed to enable periodic surveillance of elite volleyball players, who are at risk for digital ischemia. Prior to implementation, assessing reliability is mandatory. Therefore, the test-retest reliability and agreement of the SPI-Q were evaluated among the population at risk. A questionnaire survey was performed with a 2-week interval among 65 elite male volleyball players assessing symptoms of cold, pale and blue digits in the dominant hand during or after practice or competition using a 4-point Likert scale (never, sometimes, often and always). Kappa (κ) and percentage of agreement (POA) were calculated for individual symptoms, and to distinguish symptomatic and asymptomatic players. For the individual symptoms, κ ranged from "poor" (0.25) to "good" (0.63), and POA ranged from "moderate" (78%) to "good" (97%). To classify symptomatic players, the SPI-Q showed "good" reliability (κ = 0.83; 95%CI 0.69-0.97) and "good" agreement (POA = 92%). The current study has proven the SPI-Q to be reliable for detecting elite male indoor volleyball players with symptoms of digital ischemia.

  14. EFFECTS OF WHOLE BODY VIBRATION ON STRENGTH AND JUMPING PERFORMANCE IN VOLLEYBALL AND BEACH VOLLEYBALL PLAYERS

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    Zmijewski, P.; Jimenez-Olmedo, J.M.; Jové-Tossi, M.A.; Martínez-Carbonell, A.; Suárez-Llorca, C.; Andreu-Cabrera, E.

    2014-01-01

    The primary aim of this study was to examine the effects of 6-week strength training with whole body vibration (WBV) on leg strength and jumping performance in volleyball and beach volleyball players. Twenty-three sub-elite male volleyball (VB; n=12) and beach volleyball players (BVB; n=11) aged 21.2±3.0 years were divided into two groups and subjected to 6 weeks of strength training (three one-hour sessions per week): (I) 12 players (6 VB and 6 BVB players) underwent training with WBV (30-40 Hz, 1.7-2.5 mm, 3.0-5.7 g), and (II) 11 players (6 VB and 5 BVB players) underwent traditional strength training. Squat jump (SJ) and countermovement squat jump (CMJ) measurements by the Ergo Tester contact platform and maximum leg press test (1RM) were conducted. Three-factor (2 time x 2 WBV use x 2 discipline) analysis of variance for SJ, CMJ and 1RM revealed a significant time main effect (pvolleyball and beach volleyball players increases leg strength more and leads to greater improvement in jump performance than traditional strength training, but greater improvements can be expected in beach volleyball players than in volleyball players. PMID:25187676

  15. Study of the directions of service in men’s volleyball high level Estudio de la dirección del saque en la Superliga Masculina de Voleibol

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    J. J. Molina

    2010-09-01

    Full Text Available

    The aim of this study was to design and to apply an observation instrument of the service in high level men’s volleyball. This instrument was trying to differentiate the destination zones of service near to the side lines and the end line, and the directions of  services related to the same ones, trying to verify if the destination zone and direction were associating of significant and positive form efficiently. 1891 services were considered in this study, all team services of men’s volleyball high level realized during the season 2004/2005. The variables of study were origin zone, destination zone, direction and efficiency of services. The results showed that more 20% of services were realized to less than one meter of the end line, being the services realized near to the side lines. The direct point service was associated significantly and positively with services realized near to the side lines and the end line of the court, and with directions of side line services and service at the bottom of the line.
    Key words: volleyball, service, destination, direction, efficacy.

    El objetivo del presente estudio fue diseñar y aplicar un instrumento para la observación del saque en voleibol masculino de alto nivel. Mediante dicho instrumento se pretendía diferenciar fundamentalmente las zonas de destino del saque cercanas a las líneas laterales y línea de fondo, así como las direcciones de saques relacionadas con las mismas, tratando de comprobar si las citadas zonas de  destino y dirección se asociaban de forma significativa y positiva con los valores más óptimos de eficacia del saque. La muestra estuvo constituida por 1891 acciones de saque, el total de acciones de saque realizadas por un equipo de Superliga Masculina de Voleibol durante la temporada 2004/2005. Las variables de estudio fueron: zona de origen, zona de destino, dirección y eficacia, del

  16. Acute effects of Yo-Yo intermittent recovery test level 1 (Yo-YoIR1) on hemorheological parameters in female volleyball players.

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    Kilic-Toprak, Emine; Yapici, Ayşegül; Kilic-Erkek, Ozgen; Koklu, Yusuf; Tekin, Volkan; Alemdaroglu, Utku; Bor-Kucukatay, Melek

    2015-07-16

    In the present study, we investigated possible alterations in red blood cell (RBC) deformability, plasma and whole blood viscosities (WBV) and hematological parameters in response to Yo-Yo intermittent recovery test level 1 (Yo-YoIR1) which is currently used to assess endurance performance, in female volleyball players. Eight volleyball player volunteers from Pamukkale University (mean age19,9 ± 2,2 years; mean body height 177.5 ± 1.99 cm; mean body mass index 21.66 ± 0.64 kg/m2) participated to the study. Blood samples were collected before and immediately after test. Red blood cell (RBC) deformability was determined by ektacytometer, plasma and whole blood viscosities (WBV) by a cone-plate rotational viscometer. Hematological parameters were determined using an electronic hematology analyzer. The Yo-YoIR1 applied, induced acute increments in WBV at native hematocrit (Hct) measured at a shear rate of 150 s-1 and 375 s-1, RBC deformability and WBC count. The results of the current study indicate that, the Yo-Yo IR1 test used to determine physical capacity of the player, by resulting in increments in RBC deformability contributes blood flow and thus, athletic performance of the individual.

  17. Sports injuries in Plus League volleyball players.

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    Cieśla, E; Dutkiewicz, R; Mgłosiek, M; Nowak-Starz, G; Markowska, M; Jasiński, P; Dudek, J

    2015-06-01

    Although physical activity brings a range of lifelong health benefits, it may also lead to injuries that pose a significant threat to health. It is particularly noticeable in people involved in professional sports where sport-related injuries commonly occur and are associated with intense exercise which aims to improve physical fitness. The article attempts to determine incidence of sports injuries reported by Plus League volleyball players, as well as to identify their most common types and causes. The research project involved 90 Plus League volleyball players aged 18-37 with the average age of 25.11 (SD±5.378). A method of diagnostic survey was applied to collect empirical data by means of questionnaire developed by the authors (researchers). The results were statistically analysed and verified with the analysis of variance (ANOVA) and χ2 test at the significance level (or critical P-value) of P≤0.05. Over 87% of the respondents suffered from at least one sport-related injury. In total, 362 injuries occurred, on average 4.02 injuries per one volleyball player. The most common sports injuries involved ankle or talocrural joint (46 injuries), knee and lower leg muscles (30), interphalangeal articulations of fingers (30) as well as shoulder joint. More than half of the injuries (57%) occurred twice or three times. Volleyball players commonly sustain injuries through contact with an opposing player in competition. Sport-specific injuries may also occur due to exhaustion, lack of rest and undertreated injuries. The most common volleyball-related injuries are primarily talocrural joint, hand and shoulder injuries. Common types of injuries that can affect volleyball players include muscles, joints and ligaments injuries, sprains and strains as well as bruises. Most of these injuries are caused by exhaustion, contact with an opposing player during competition and fatigue. The incidence of sport-related injuries seems to be influenced by such factors as somatic

  18. Volleyball Scoring Systems.

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    Calhoun, William; Dargahi-Noubary, G. R.; Shi, Yixun

    2002-01-01

    The widespread interest in sports in our culture provides an excellent opportunity to catch students' attention in mathematics and statistics classes. One mathematically interesting aspect of volleyball, which can be used to motivate students, is the scoring system. (MM)

  19. Volleyball Scoring Systems.

    Science.gov (United States)

    Calhoun, William; Dargahi-Noubary, G. R.; Shi, Yixun

    2002-01-01

    The widespread interest in sports in our culture provides an excellent opportunity to catch students' attention in mathematics and statistics classes. One mathematically interesting aspect of volleyball, which can be used to motivate students, is the scoring system. (MM)

  20. Landing Techniques in Beach Volleyball

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    Tilp, Markus; Rindler, Michael

    2013-01-01

    The aims of the present study were to establish a detailed and representative record of landing techniques (two-, left-, and right-footed landings) in professional beach volleyball and compare the data with those of indoor volleyball. Beach volleyball data was retrieved from videos taken at FIVB World Tour tournaments. Landing techniques were compared in the different beach and indoor volleyball skills serve, set, attack, and block with regard to sex, playing technique, and court position. Significant differences were observed between men and women in landings following block actions (χ2(2) = 18.19, p volleyball revealed overall differences both in men (χ2(2) = 161.4, p volleyball players land more often on both feet than indoor volleyball players. Besides the softer surface in beach volleyball, and therefore resulting lower loads, these results might be another reason for fewer injuries and overuse conditions compared to indoor volleyball. Key Points About 1/3 of all jumping actions in beach volleyball result in a landing on one foot. Especially following block situations men land on one foot more often than women. Landing techniques are related to different techniques and positions. Landings on one foot are less common in beach volleyball than indoor volleyball. This could be a reason for fewer injuries and overuse conditions. PMID:24149150

  1. [Dietary behaviours of volleyball and basketball players].

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    Szczepańska, Elzbieta; Spałkowska, Agnieszka

    2012-01-01

    In sports, such as basketball and volleyball, players must demonstrate the speed, strength, stamina and concentration. Correct nutrition affects the strength of the muscles and the extension of capacity. It is also necessary for the proper functioning of the nervous system and determines the rate of regeneration after physical effort. The aim of this study was to assess dietary behaviours of professional volleyball and basketball players and compare the prevalence of correct behaviours in both groups. 209 professional volleyball and basketball players from sports clubs localized in six Silesian cities were survived with the mean of author questionnaire. The chi-square test was used to examine differences in the prevalence of the correct behaviours among players. Analysis of the results obtained showed that 52% of the players had 4-5 meals a day. 35% of respondents had wholemeal bread and/or groats daily. Milk and dairy products daily ate 71% of surveyed players, meat and sausages 70% respectively. 41% of respondents had cottage cheese and 28% had fish several times a week. Vegetables and fruit were eaten by 21% and respectively 23% of respondents. Sweets were eaten daily by 40% of surveyed, while fast-food were eaten several times a week by 17% of players. Nutrients for athletes were used by 32%, and vitamin supplementation by 48% of respondents. Prevalence of correct dietary behaviour in the group of professional volleyball and basketball players differed. Basketball players statistically more frequently than volleyball players had 4-5 meals a day, had wholemeal bread and/or thick groats, milk and dairy products, meat and sausages, especially poultry. They had raw vegetables and fruit several times a day. They drank more than 2.5 liters of fluids per day. They also significantly more frequently than volleyball players consumed the fast-food occasionally or never. Dietary behaviours of surveyed players were incorrect. Comparison of prevalence of proper behaviours

  2. Strength asymmetry of the shoulders in elite volleyball players.

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    Hadzic, Vedran; Sattler, Tine; Veselko, Matjaž; Markovic, Goran; Dervisevic, Edvin

    2014-01-01

    Volleyball players are reported to have shoulder strength imbalances. Previous authors have primarily investigated small samples of male players at a single skill level, without considering playing position, and with inconsistent findings. To evaluate shoulder strength asymmetry and a history of shoulder injury in a large sample of professional volleyball players of both sexes across different playing positions and skill levels. Descriptive laboratory study. A sample of 183 volleyball players (99 men, 84 women). We assessed shoulder internal-rotator and external-rotator concentric strength at 60°/s using an isokinetic dynamometer and dominant-nondominant differences in shoulder strength and strength ratios using repeated-measures analyses of variance. Peak torque was normalized for body mass and external-rotation/internal-rotation concentric strength. Internal-rotation strength was asymmetric in favor of the dominant side in both sexes, regardless of previous shoulder injury status. Male volleyball players had a lower shoulder strength ratio on the dominant side, regardless of previous shoulder injury status. However, this finding was valid only when hand dominance was taken into account. Female volleyball players playing at a higher level (ie, first versus second division) were 3.43 times more likely to have an abnormal strength ratio. Playing position was not associated with an abnormal shoulder strength ratio or strength asymmetry. In male volleyball players, the external-rotation/internal-rotation strength ratio of the dominant shoulder was lower, regardless of playing position, skill level, or a previous shoulder injury. In female players, the ratio was less only in those at a higher skill level. Although speculative, these findings generally suggest that female volleyball players could have a lower risk of developing shoulder-related problems than male volleyball players. Isokinetic shoulder testing may reveal important information about the possible risk

  3. HAND INJURIES IN VOLLEYBALL

    NARCIS (Netherlands)

    BHAIRO, NH; NIJSTEN, MWN; VANDALEN, KC; TENDUIS, HJ

    We studied the long-term sequelae of hand injuries as a result of playing volleyball. In a retrospective study, 226 patients with injuries of the hand who were seen over a 5-year period at our Trauma Department, were investigated. Females accounted for 66 % of all injuries. The mean age was 26

  4. HAND INJURIES IN VOLLEYBALL

    NARCIS (Netherlands)

    BHAIRO, NH; NIJSTEN, MWN; VANDALEN, KC; TENDUIS, HJ

    1992-01-01

    We studied the long-term sequelae of hand injuries as a result of playing volleyball. In a retrospective study, 226 patients with injuries of the hand who were seen over a 5-year period at our Trauma Department, were investigated. Females accounted for 66 % of all injuries. The mean age was 26 years

  5. Relação saque, recepção e ataque no voleibol juvenil masculino Relation service, reception and attack in male junior volleyball

    Directory of Open Access Journals (Sweden)

    Gustavo De Conti Teixeira Costa

    2011-03-01

    Full Text Available Neste texto, O objetivo do presente estudo consistiu em analisar a relação do saque e da recepção com o efeito do ataque em seleções nacionais de voleibol juvenil masculino. Recorreu-se à observação e análise de onze jogos, totalizando 781 ações de ataque. Os resultados demonstraram que o ponto no ataque ocorreu mais do que o esperado após o saque suspensão colocado e após a recepção que permitiu todas as opções de ataque. Contrariamente, este ocorreu menos do que o esperado após o saque suspensão potente e a recepção que não permitiu ataque organizado. O presente estudo permitiu inferir que o saque potente e a recepção com baixos níveis de eficácia reduzem as possibilidades de pontuar no ataque. O fato do saque potente adversário induzir menor ocorrência de ponto no ataque, pode sugerir alguma debilidade na organização ofensiva da equipa perante as dificuldades acrescidas colocadas por este tipo de saque.Tal sugere a necessidade de, desde as categorias de base, ser dada maior atenção no treinamento à capacidade das equipas organizarem as manobras ofensivas em resposta a saques agressivos como é o caso do saque suspensão potente.The purpose of this study was to analyze the relationship between serve and serve reception on the effect of the offensive system in the national junior male volleyball teams. Eleven games were analyzes, totaling 781 attack actions. The results showed that the attack point occurred more than expected after the top spin placed jump serve from the opponent and after the reception that allowed all the attack options. In contrast, to this one and the reception that did not allowed an organized attack occurred less than expected after the power jump service. This study made it possible to infer that powerful service and the reception with low levels of efficiency reduce the chances of scoring in the attack. The fact that the opponent's powerful service results lesser occurrences of the

  6. LANDING TECHNIQUES IN BEACH VOLLEYBALL

    Directory of Open Access Journals (Sweden)

    Markus Tilp

    2013-09-01

    Full Text Available The aims of the present study were to establish a detailed and representative record of landing techniques (two-, left-, and right-footed landings in professional beach volleyball and compare the data with those of indoor volleyball. Beach volleyball data was retrieved from videos taken at FIVB World Tour tournaments. Landing techniques were compared in the different beach and indoor volleyball skills serve, set, attack, and block with regard to sex, playing technique, and court position. Significant differences were observed between men and women in landings following block actions (χ²(2 = 18.19, p < 0.01 but not following serve, set, and attack actions. Following blocking, men landed more often on one foot than women. Further differences in landings following serve and attack with regard to playing technique and position were mainly observed in men. The comparison with landing techniques in indoor volleyball revealed overall differences both in men (χ²(2 = 161.4, p < 0.01 and women (χ²(2 = 84.91, p < 0.01. Beach volleyball players land more often on both feet than indoor volleyball players. Besides the softer surface in beach volleyball, and therefore resulting lower loads, these results might be another reason for fewer injuries and overuse conditions compared to indoor volleyball

  7. Biomotor status and kinesiological education of girls aged 10 to 12 years--example: volleyball.

    Science.gov (United States)

    Milić, Mirjana; Grgantov, Zoran; Katić, Ratko

    2012-09-01

    The aim of this study was to define processes of orientation and/or selection towards sports game of volleyball in schoolgirls of Kastela, aged 10-12, by examining the relations between regular classes of physical education (PE) and extracurricular sport activities. For this purpose, two morphological measures were used (body height and body mass) and a set of 11 motor tests (6 basic motor abilities tests and 5 motor achievement tests) on a sample of 242 girls aged 10-12 was used, divided into a subsample of 42 girls participating in volleyball training (Volleyball players) and a subsample of 200 girls who do not participate in volleyball training (volleyball non-players). Based on the comparison of test results of schoolgirls from Kastela and Croatian norms, factor analysis of applied variables and discriminant analysis of these variables between volleyball players and non-players, processes and/or phases of selection in forming quality volleyball players were defined. Selection processes are preceded by orientation processes in physical education classes, i.e. choosing those sport activities which are in accordance with the biomotor status of students. Results have shown that orientation and initial selection in female volleyball needs to be executed based on the motor set of psychomotor speed, repetitive strength of the trunk and flexibility (muscle tone regulation), and body height. Volleyball training has affected the muscle mass development and the development of strength factors, so that explosive strength of jumping and/or takeoff along with body height, has predominantly differentiated female volleyball players from non-players, aged 10 to 12, and serve and spike quality will have dominant influence on the match outcome.

  8. THE DIFFERENCE BETWEEN TWO VOLLEYBALL TEAMS IN SOME ANTHROPOMETERIC AND MOTOR ABILITIS

    Directory of Open Access Journals (Sweden)

    Bahri Gjinovci

    2014-06-01

    Full Text Available Introduction: In this research we are deal with two teams of the super league of Kosovo in volleyball. The goal of this study is to verify the differences between the two teams in volleyball in some anthropometric characteristics, basic motor skills and situational tests. Methods: For the realization of this research, there were included 12 volleyball player from the team KV “Prishtina" and 12 from the team KV "Universiteti AAB". There are applied 4 anthropometric variables (body weight, body height, arm length, forearm length, 5 basic motor variables (long jump from place, high jump from the place taping hand, taping feet, jogging with 20 meters with a fast start, and 7 situational tests (pass the ball with the fingers on target vertical expulsion of the ball with the forearm ("hammer" in vertical target, passing the ball with the fingers in a horizontal target, the expulsion of the ball with the forearm ("hammer" in horizontal target, pass the ball with fingers to jump in the horizontal target, tennis service in horizontal target, the target service with the horizontal jump. For processing the obtained results from the measurements and proving the difference between the teams in anthrop motored parameters, was used the discriminatory analysis using the t-test for independent variables. Results: The results obtained show that the players of the two volleyball teams, involved in research do not distinguish between them in anthropometric characteristics (p> 0:05. The team KV "Prishtina" has had better results in some explosive force motor variables and situational tests (p 1.97, at the statistical significance level of p < 0.05. Results from our sample showed that between VC. "Pristina" and VC. "AAB", important statistical changes were in those motoric tests. High jumping, foot taping, Passing the ball with hammer to the wall, Tactical accurate Service, Accuracy of service with jump and Standing long jump length. References: Strahonja A

  9. Enhancing physical performance in male volleyball players with a caffeine-containing energy drink.

    Science.gov (United States)

    Del Coso, Juan; Pérez-López, Alberto; Abian-Vicen, Javier; Salinero, Juan Jose; Lara, Beatriz; Valadés, David

    2014-11-01

    There are no scientific data about the effects of caffeine intake on volleyball performance. The aim of this study was to investigate the effect of a caffeine-containing energy drink to enhance physical performance in male volleyball players. A double-blind, placebo-controlled, randomized experimental design was used. In 2 different sessions separated by 1 wk, 15 college volleyball players ingested 3 mg of caffeine per kg of body mass in the form of an energy drink or the same drink without caffeine (placebo). After 60 min, participants performed volleyball-specific tests: standing spike test, maximal squat jump (SJ), maximal countermovement jump (CMJ), 15-s rebound jump test (15RJ), and agility T-test. Later, a simulated volleyball match was played and recorded. In comparison with the placebo drink, the ingestion of the caffeinated energy drink increased ball velocity in the spike test (73 ± 9 vs 75 ± 10 km/h, P energy drink (10.8 ± 0.7 vs 10.3 ± 0.4 s, P performed successful volleyball actions more frequently (24.6% ± 14.3% vs 34.3% ± 16.5%, P energy drink than with the placebo drink during the simulated game. A caffeine-containing energy drink, with a dose equivalent to 3 mg of caffeine per kg body mass, might be an effective ergogenic aid to improve physical performance and accuracy in male volleyball players.

  10. The Changing Rules of the Game, Volleyball Player Systematic Structure and Effects in Applying

    Directory of Open Access Journals (Sweden)

    Özgür DİNÇER

    2015-08-01

    Full Text Available Purpose: We the purpose of this study, ranging from past to present and play volleyball rule changes that occur related to industry structure, how structure affects in applying with a systematic trial. Method: Volleyball, starting from the date of the present day sports entertainment, sport has become a subject performance. . As regards; the changing rules of the game, in terms of volleyball player systematic structure and effects on performance. The changing rules of the game, volleyball player systematic structure and effects the exhibition of the game, tactical understanding of the game is to combine the implementation of different systems to meet the needs of training and competition has created situations. Volleyball to purpose of changing the rules of the game, service, location and block combinations to improve defense, reducing the effect of conditions of service coverage and attack the ball to extend the duration of stay in the game. Thus, the visuals might volleyball, in terms of spectators and media will become attractive. While this study, scan was used during the research literature. Results: According to the data obtained from the literature, that the structural changes in the volleyball is thought to cause the positive and negative impact in the volleyball. Conclusion: Result of this research, the changing rules of the game affected the players' and the exhibition of the game and the diversity of training, volleyball game speed has increased, and became the focus of visual winning. The conclusion of every move made in the field with a number of players has increased and with it the responsibility of the importance of individual tactical exercises may have gained more importance.

  11. Differentiating Experts' Anticipatory Skills in Beach Volleyball

    Science.gov (United States)

    Canal-Bruland, Rouwen; Mooren, Merel; Savelsbergh, Geert J. P.

    2011-01-01

    In this study, we examined how perceptual-motor expertise and watching experience contribute to anticipating the outcome of opponents' attacking actions in beach volleyball. To this end, we invited 8 expert beach volleyball players, 8 expert coaches, 8 expert referees, and 8 control participants with no beach volleyball experience to watch videos…

  12. Differentiating Experts' Anticipatory Skills in Beach Volleyball

    Science.gov (United States)

    Canal-Bruland, Rouwen; Mooren, Merel; Savelsbergh, Geert J. P.

    2011-01-01

    In this study, we examined how perceptual-motor expertise and watching experience contribute to anticipating the outcome of opponents' attacking actions in beach volleyball. To this end, we invited 8 expert beach volleyball players, 8 expert coaches, 8 expert referees, and 8 control participants with no beach volleyball experience to watch videos…

  13. A Testing Service for Industry

    Science.gov (United States)

    1994-01-01

    A small isolated NASA facility provides assistance to industry in the design, testing, and operation of oxygen systems. White Sands Test Facility (WSTF) was originally established to test rocket propulsion systems for the Apollo program. The facility's role was later expanded into testing characterization, flammability and toxicity characteristics of materials. Its materials and components test methods were adopted by the American society for Testing and Materials. When research and testing results became known, industry requested assistance, and in 1980, NASA authorized WSTF to open its facility to private firms, a valuable service, as oxygen systems testing is often too expensive and too hazardous for many companies. Today, some of the best known American industries utilize White Sands testing capabilities.

  14. A Profile of Fitness Parameters and Performance of Volleyball Players

    Directory of Open Access Journals (Sweden)

    Govind B. Taware

    2013-07-01

    Full Text Available Background: Ball games require comprehen-sive ability including physical, technical, men-tal and tactical abilities. Among them, physicalabilities of players exert marked effects on theskill of the players themselves and the tacticsof the team. Therefore players must have thephysical abilities to meet the demand of thesport. Volleyball is one of the most popularlyplayed games in the world. Unfortunately, thelevel of performance of the Indian volleyballplayers lags far behind the international stan-dards. Aim of the Study: The present study wasaimed to assess flexibility, muscular endurance,power and cardio-respiratory endurance of vol-leyball players and to compare the results withage matched controls. Also, to compare thefindings of the volleyball players with that ofthe international norms from the available lit-erature and to make some suggestions for theimprovement in their performance level. Ma-terial and Methods: The study was carried outin 40 male volleyball players aged between 17to 26 years and 40 ages matched male controls.Physical fitness parameters namely flexibility,muscular endurance, power and cardio-respi-ratory endurance were measured, data was ana-lyzed using unpaired ‘t’-test. Results: It was ob-served that all physical fitness parameters weresignificantly more in players as compared totheir aged-matched controls but when values ofthe subjects were compared to internationalstandards; our subjects were behind the recom-mended norms for the elite volleyball players.Conclusion: The volleyball players have moreadvantage of flexibility muscular endurance,power and cardio-respiratory endurance.

  15. Volleyball injuries in KwaZulu-Natal — epidemiology

    African Journals Online (AJOL)

    Abstract. Objective. This study explored the incidence, nature and ... Natal participated by informed voluntary consent Data were gathered using a ... Package for the Social Sciences (SPSS) for Windows and chi-square tests with a ... Volleyball is a popular recreational and professional sport code both locally .... the literature.

  16. Comparison of static and dynamic balance among collegiate cricket, soccer and volleyball male players

    Directory of Open Access Journals (Sweden)

    P Ratan Khuman

    2014-01-01

    Full Text Available Background: Athletes from different sports requires balance control for their better performance depending on game type they involved. When prescribing balance exercises to athletes in different sports, it may be important to recognize performance variations. Objective: The objective of the present study was to compare the static and dynamic balance among collegiate cricket, soccer and volleyball male players. Materials and Methods: A total of 150 students, college level male players from five different colleges were requited for the study with purposive sampling. They were assigned into three different groups according to their types of sports, cricket n = 50, soccer n = 50, volleyball n = 50. The static and dynamic balance was assessed using flamingo balance test (FBT and star excursion balance test (SEBT in institutional based sports physiotherapy department. Results: Intra-group comparison for FBT and SEBT score shows no significance difference (P > 0.05. Multiple comparison of FBT and SEBT score between groups reveals significantly difference between cricket and soccer player (P = 0.000, between cricket and volleyball player (P = 0.000 and between soccer player and volleyball players (P = 0.000. FBT and SEBT score were significantly higher in soccer players than volleyball and cricketer were found to have the least score compared with soccer and volleyball players. Conclusion: There is significance difference in static and dynamic balance among collegiate cricket, soccer and volleyball male players. The soccer players demonstrate higher balance than volleyball players and the volleyball players have a higher balance than that of cricketers both statically and dynamically.

  17. Identification af explosive power factors as predictors of player quality in young female volleyball players.

    Science.gov (United States)

    Grgantov, Zoran; Milić, Mirjana; Katić, Ratko

    2013-05-01

    With the purpose of determining the factor structure of explosive power, as well as the influence of each factor on situational efficiency, 56 young female volleyball players were tested using 14 tests for assessing nonspecific and specific explosive power. By factor analysis, 4 significant factors were isolated which explained the total of over 80% of the common variability in young female volleyball players. The first factor was defined as volleyball-specific jumping, the second factor as nonspecific jumping and sprinting, the third factor as throwing explosive power, while the fourth factor was interpreted as volleyball-specific throwing and spiking speed from the ground. Results obtained by regression analysis in the latent space of explosive power indicate that the identified factors are good predictors of player quality in young female volleyball players. The fourth factor defined as throwing and spiking speed from the ground had the largest influence on player quality, followed by volleyball-specific jumping and nonspecific jumping and sprinting, and to a much lesser extent, by throwing explosive power The results obtained in this age group bring to the fore the ability of spiking and serving a ball of high speed, which hinders the opponents from playing those balls in serve reception and field defence. This ability, combined with a high standing vertical jump reach and spike approach vertical jump reach (which is the basis of the 1st varimax factor) enables successful performance of all volleyball elements by which points are won in complex 1 (spike) and complex 2 (serve and block). Even though the 2nd factor (nonspecific jumping and sprinting) has a slightly smaller impact on situational efficiency in young players, this ability provides preconditions i.e. preparation for successful realisation of all volleyball elements, so greater attention must be paid to perfecting it in young female volleyball players.

  18. Sex differences in discriminative power of volleyball game-related statistics.

    Science.gov (United States)

    João, Paulo Vicente; Leite, Nuno; Mesquita, Isabel; Sampaio, Jaime

    2010-12-01

    To identify sex differences in volleyball game-related statistics, the game-related statistics of several World Championships in 2007 (N=132) were analyzed using the software VIS from the International Volleyball Federation. Discriminant analysis was used to identify the game-related statistics which better discriminated performances by sex. Analysis yielded an emphasis on fault serves (SC = -.40), shot spikes (SC = .40), and reception digs (SC = .31). Specific robust numbers represent that considerable variability was evident in the game-related statistics profile, as men's volleyball games were better associated with terminal actions (errors of service), and women's volleyball games were characterized by continuous actions (in defense and attack). These differences may be related to the anthropometric and physiological differences between women and men and their influence on performance profiles.

  19. Predicting Volleyball Serve-Reception

    NARCIS (Netherlands)

    Paulo, Ana; Zaal, Frank T J M; Fonseca, Sofia; Araujo, Duarte

    2016-01-01

    Serve and serve-reception performance have predicted success in volleyball. Given the impact of serve-reception on the game, we aimed at understanding what it is in the serve and receiver's actions that determines the selection of the type of pass used in serve-reception and its efficacy. Four

  20. Predicting Volleyball Serve-Reception

    NARCIS (Netherlands)

    Paulo, Ana; Zaal, Frank T J M; Fonseca, Sofia; Araujo, Duarte

    2016-01-01

    Serve and serve-reception performance have predicted success in volleyball. Given the impact of serve-reception on the game, we aimed at understanding what it is in the serve and receiver's actions that determines the selection of the type of pass used in serve-reception and its efficacy. Four high-

  1. Long-term training adaptations in elite male volleyball players.

    Science.gov (United States)

    Sheppard, Jeremy M; Newton, Robert U

    2012-08-01

    Several investigations have demonstrated differences in anthropometry, jump performance, and strength variables between developmental and elite-level volleyball players. However, within the elite level of play, the magnitude of change that can occur with training is unclear. The purpose of this investigation was to examine the anthropometric, vertical jump, and strength quality changes over 2 years in a group of national team volleyball players. Fourteen national team volleyball players (age, 23.0 ± 4.1 years; height, 1.98 ± 0.07 m; weight, 91.7 ± 7.9 kg) began and completed this study. Participants had all played international matches (representing Australia) before the examination time period and continued to do so during the international season. Anthropometry (stature, mass, and sum of 7 skinfolds), vertical jump measures (countermovement vertical jump; depth jump from 0.35 m, DJ; spike jump, SPJ, all including arm swing), and lower-body power (jump squat at body mass, and jump squat + 50% body weight, JS50) measures were tested before and at the conclusion of the investigation period. Significant (p 0.70) in the sum of 7 skinfolds reduction, SPJ, and leg extensor power. This study has demonstrated that elite male volleyball players can improve leanness and power, which contribute to improvements in vertical jump.

  2. Shaping decisions in volleyball An ecological approach to decision-making in volleyball passing

    NARCIS (Netherlands)

    Barsingerhorn, Annemiek D.; Zaal, Frank T. J. M.; De Poel, Harjo J.; Pepping, Gert-Jan

    2013-01-01

    To extend research on decision-making in sport we addressed the choices volleyball-players are faced with in a simple volleyball pass-return task. We manipulated the distance that eight experienced volleyball players had to cover for successful ball passing, and mapped their passing technique (i.e.,

  3. Avaliação da resistência de força explosiva em voleibolistas através de testes de saltos verticais Assessment of explosive strength-endurance in volleyball players through vertical jumping test

    Directory of Open Access Journals (Sweden)

    Jefferson Eduardo Hespanhol

    2007-06-01

    Full Text Available O propósito deste estudo foi verificar a existência de diferenças entre o teste de salto vertical com natureza contínua de 60 segundos (TSVC e o teste de salto vertical com natureza intermitente de quatro séries de 15 segundos (TSVI. Os dados foram obtidos através de amostra composta por 10 voleibolistas do sexo masculino (19,01 ± 1,36 anos; 191,5 ± 5,36cm; e 81,74 ± 7,45kg, todos com participação voluntária. As variáveis estudadas foram: as estimativas do pico de potência (PP, potência média (PM e o índice de fadiga (IF. O desempenho estimado através dos testes TSVC, com duração de 60 segundos, e o TSVI foi determinado em quatro séries de 15 segundos, com 10 segundos de recuperação entre cada série. Os dados foram determinados através da estatística descritiva e do teste de Wilcoxon; o nível de significância utilizado foi de p The aim of this study was to verify the differences between the continuous jump test of 60 seconds (CJ60 sec and the intermittent jump test of 4 sets of 15 seconds (IJ4x15 sec. The sample was composed of 10 male volleyball players with 19.01 ± 1.36 years, 191.5 ± 5.36 cm height and 81.74 ± 7.45 of body mass, who participated in this research as volunteers. The variables studied were estimated as the peak power (PP, mean power (MP and fatigue index (FI. These performances were measured through tests of vertical jump with duration the 60 seconds and with the performance of 4 sets of 15 seconds with 10 seconds of recovery between the sets. The data were analyzed through descriptive statistics and the Wilcoxon test. The significance level was of p < 0.05. It was possible to analyze that the continuous and the intermittent jump test presented significant differences in MP (p < 0.05, FI (p < 0.01, and in the number of the vertical jump in 60 seconds (p < 0.01, and the height in 60 seconds exercise (p < 0.05. The MP found in IJ4x15sec was significantly higher than in the CJ60 sec in volleyball

  4. 12 CFR 228.24 - Service test.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 3 2010-01-01 2010-01-01 false Service test. 228.24 Section 228.24 Banks and... REINVESTMENT (REGULATION BB) Standards for Assessing Performance § 228.24 Service test. (a) Scope of test. The service test evaluates a bank's record of helping to meet the credit needs of its assessment area(s)...

  5. Romanian Volleyball in deadlock? Till when?

    Directory of Open Access Journals (Sweden)

    Sorin Grădinaru

    2009-06-01

    Full Text Available Even if it was the subject of some analysis which has to identify the degradation causes of volleyball in Romania, the most expected revival didn’t happened, the same drawbacks as 25 years ago being emphasized.We can’t put everything in the back of the after-December evolution of the Romanian society, but one thing is certain: from all the sportive games volleyball is in the most concerning situation, and the immediate perspective doesn’t seem to be on the will of those (as many as they still are who still care for volleyball. Romanian Volleyball in deadlock? Till when?

  6. Upper limb biomechanics during the volleyball serve and spike.

    Science.gov (United States)

    Reeser, Jonathan C; Fleisig, Glenn S; Bolt, Becky; Ruan, Mianfang

    2010-09-01

    The shoulder is the third-most commonly injured body part in volleyball, with the majority of shoulder problems resulting from chronic overuse. Significant kinetic differences exist among specific types of volleyball serves and spikes. Controlled laboratory study. Fourteen healthy female collegiate volleyball players performed 5 successful trials of 4 skills: 2 directional spikes, an off-speed roll shot, and the float serve. Volunteers who were competent in jump serves (n, 5) performed 5 trials of that skill. A 240-Hz 3-dimensional automatic digitizing system captured each trial. Multivariate analysis of variance and post hoc paired t tests were used to compare kinetic parameters for the shoulder and elbow across all the skills (except the jump serve). A similar statistical analysis was performed for upper extremity kinematics. Forces, torques, and angular velocities at the shoulder and elbow were lowest for the roll shot and second-lowest for the float serve. No differences were detected between the cross-body and straight-ahead spikes. Although there was an insufficient number of participants to statistically analyze the jump serve, the data for it appear similar to those of the cross-body and straight-ahead spikes. Shoulder abduction at the instant of ball contact was approximately 130° for all skills, which is substantially greater than that previously reported for female athletes performing tennis serves or baseball pitches. Because shoulder kinetics were greatest during spiking, the volleyball player with symptoms of shoulder overuse may wish to reduce the number of repetitions performed during practice. Limiting the number of jump serves may also reduce the athlete's risk of overuse-related shoulder dysfunction. Volleyball-specific overhead skills, such as the spike and serve, produce considerable upper extremity force and torque, which may contribute to the risk of shoulder injury.

  7. Test Cases Reduction and Selection Optimization in Testing Web Services

    Directory of Open Access Journals (Sweden)

    Izzat Alsmadi

    2012-10-01

    Full Text Available Software testing in web services environment faces different challenges in comparison with testing in traditional software environments. Regression testing activities are triggered based on software changes or evolutions. In web services, evolution is not a choice for service clients. They have always to use the current updated version of the software. In addition test execution or invocation is expensive in web services and hence providing algorithms to optimize test case generation and execution is vital. In this environment, we proposed several approach for test cases’ selection in web services’ regression testing. Testing in this new environment should evolve to be included part of the service contract. Service providers should provide data or usage sessions that can help service clients reduce testing expenses through optimizing the selected and executed test cases.

  8. The effect of ankle bracing on knee kinetics and kinematics during volleyball-specific tasks.

    Science.gov (United States)

    West, T; Ng, L; Campbell, A

    2014-12-01

    The purpose of this study was to examine the effects of ankle bracing on knee kinetics and kinematics during volleyball tasks. Fifteen healthy, elite, female volleyball players performed a series of straight-line and lateral volleyball tasks with no brace and when wearing an ankle brace. A 14-camera Vicon motion analysis system and AMTI force plate were used to capture the kinetic and kinematic data. Knee range of motion, peak knee anterior-posterior and medial-lateral shear forces, and peak ground reaction forces that occurred between initial contact with the force plate and toe off were compared using paired sample t-tests between the braced and non-braced conditions (P volleyball tasks. However, ankle bracing was demonstrated to reduce knee lateral shear forces during all of the lateral movement volleyball tasks. Wearing the Active Ankle T2 brace will not impact knee joint range of motion and may in fact reduce shear loading to the knee joint in volleyball players. © 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  9. Postural Variables in Girls Practicing Volleyball

    Science.gov (United States)

    Grabara, Malgorzata; Hadzik, Andrzej

    2009-01-01

    Study aim: To assess body posture of young female volleyball players in relation to their untrained mates. Material and methods: A group of 42 volleyball players and another of 43 untrained girls, all aged 13-16 years were studied with respect to their body posture indices by using computer posturography. Spinal angles and curvatures were…

  10. Cardiorespiratory Fitness of University Volleyball Players and Sedentary Young People in Marathwada Region of Maharashtra Province in India.

    Science.gov (United States)

    Kausar, Afshan; Mudassir, Syed; Badaam, Khaled Mohsin; Shete, A N; Khan, Shoeb

    2015-07-01

    Volleyball is considered a physically demanding athletic sport; characterized by rapid acceleration, deceleration, and sudden changes of direction. It has been highlighted that aerobic capacity (VO2 max) which indicates cardiorespiratory fitness has a significant effect on the performance of athletes and is an important element of success in sports. The objective of this study was to compare aerobic capacity of university volleyball players from the region with that of matched sedentary controls. The secondary objective was to compare the findings with the aerobic capacity data reported in literature for the volleyball players and sedentary population. Sample size was calculated for detecting a large effect size (Cohen's d = 0.8) with α as 0.05 and power of study as 80% for two tailed hypothesis testing. By using Queen's college step test, VO2 max was measured in 30 male volleyball players in the age group of 20 to25 years and was compared with 30 age and socio-economic status matched controls with sedentary lifestyle. The mean predicted VO2 max was 52.99 ± 5.13 ml/kg/min in volleyball players and 37.01 ± 3.94 ml/kg/min in controls. The difference in mean values of VO2 max (ml/kg/min) in volleyball players and controls was statistically highly significant with p-value less than 0.001. The volleyball players showed a superior aerobic capacity compared with age and socio-economic status matched controls with sedentary lifestyle.

  11. Menstrual cycle disorders in female volleyball players.

    Science.gov (United States)

    Wodarska, M; Witkoś, J; Drosdzol-Cop, A; Dąbrowska, J; Dąbrowska-Galas, M; Hartman, M; Plinta, R; Skrzypulec-Plinta, V

    2013-07-01

    The aim of this study was to examine the relation between increased physical activity and menstrual disorders in adolescent female volleyball players. The study was conducted on 210 Polish female volleyball players, aged 13-17 years, the authorship questionnaire was used. The results of the study showed that irregular menstruation occurred in 19% of girls, spotting between menstrual periods in 27% and heavy menstruation was reported in 33% of girls. Out of all volleyball female players participating in the study, 94 girls (45%) declared absence of menstrual periods after regular cycles. Statistical analysis showed that the more training hours per week, the bigger probability of the occurrence of irregular menstruation. It was concluded that the number of hours of volleyball training per week affects regularity of menstrual cycles in female volleyball players. The absence of menstruation might be caused by the duration of training per week or years of training.

  12. Caffeinated energy drinks improve volleyball performance in elite female players.

    Science.gov (United States)

    Pérez-López, Alberto; Salinero, Juan José; Abian-Vicen, Javier; Valadés, David; Lara, Beatriz; Hernandez, Cesar; Areces, Francisco; González, Cristina; Del Coso, Juan

    2015-04-01

    The objective of this study is to determine the effects of a caffeine-containing energy drink on female volleyball players' performance. Thirteen elite female volleyball players ingested 3 mg·kg of caffeine with an energy drink or the same drink without caffeine (placebo drink) in a double-blind and randomized study. Then, participants performed the following: standing spike, jumping spike, spike jump, blocking jump, squat jump, countermovement jump, manual dynamometry, and the agility t-test. A simulated volleyball game was played, videotaped, and notated afterward. In comparison to the placebo drink, the ingestion of the caffeinated energy drink increased the ball velocity in the standing spike (19.2 ± 2.1 vs 19.7 ± 1.9 m·s, P = 0.023) and in the jumping spike (17.9 ± 2.2 vs 18.8 ± 2.2 m·s, P = 0.038) and the jump height in the squat jump (28.1 ± 3.2 vs 29.4 ± 3.6 cm, P = 0.028), countermovement jump (32.0 ± 4.6 vs 33.1 ± 4.5 cm, P = 0.018), spike jump (43.3 ± 4.7 vs 44.4 ± 5.0 cm, P = 0.025), and block jump (35.2 ± 5.1 vs 36.1 ± 5.1 cm, P = 0.044). Furthermore, the caffeinated energy drink decreased the time needed to complete the agility t-test (11.1 ± 0.5 vs 10.9 ± 0.3 s, P = 0.036). During the game, the volleyball actions categorized as successful were more frequent with the caffeinated energy drink (34% ± 9% vs 45% ± 9%, P drink. Commercially available energy drinks can significantly improve physical performance in female volleyball players. Increased physical performance led to improved accuracy during an actual volleyball match.

  13. 76 FR 25381 - Postal Service Market Test

    Science.gov (United States)

    2011-05-04

    ... Postal Service Market Test AGENCY: Postal Regulatory Commission. ACTION: Notice. SUMMARY: The Commission... Logistics experimental market test, pending Commission action on anticipated request for permanent status... Postal Service moved to temporarily extend its Collaborative Logistics market test under 39 U.S.C....

  14. 76 FR 22739 - Postal Service Market Test

    Science.gov (United States)

    2011-04-22

    ... Postal Service Market Test AGENCY: Postal Regulatory Commission. ACTION: Notice. SUMMARY: The Commission is noticing a recently-filed Postal Service proposal to conduct a limited market test involving a... describes the proposed test, addresses procedural aspects of the filing, and invites public comment....

  15. Transition I efficiency and victory in volleyball matches

    Directory of Open Access Journals (Sweden)

    Herbert Ugrinowitsch

    2014-03-01

    Full Text Available The present study investigated the correlation between Transition Iwith victory in volleyball matches. The 2002 South-American Youth Men's Championship was recorded and the Transition I was analyzed and classified as negative, null or positive. Results of the efficiency in Transition I was calculated using t test for independent samples and compared to the efficiency between teams during each set and matches. Spearman correlation assessed the relationship between efficiency in each set and results of the matches with the final ranking in the championship. The results showed that the winning teams exhibited higher efficiency in Transition I, as well as a positive relationship of higher efficiency in Transition I with all of their results. The higher efficiency in Transition I is related to victory in volleyball matches.

  16. Predicting Volleyball Serve-Reception

    Science.gov (United States)

    Paulo, Ana; Zaal, Frank T. J. M.; Fonseca, Sofia; Araújo, Duarte

    2016-01-01

    Serve and serve-reception performance have predicted success in volleyball. Given the impact of serve-reception on the game, we aimed at understanding what it is in the serve and receiver's actions that determines the selection of the type of pass used in serve-reception and its efficacy. Four high-level volleyball players received jump-float serves from four servers in two reception zones—zone 1 and 5. The ball and the receiver's head were tracked with two video cameras, allowing 3D world-coordinates reconstruction. Logistic-regression models were used to predict the type of pass used (overhand or underhand) and serve-reception efficacy (error, out, or effective) from variables related with the serve kinematics and related with the receiver's on-court positioning and movement. Receivers' initial position was different when in zone 1 and 5. This influenced the serve-related variables as well as the type of pass used. Strong predictors of using an underhand rather than overhand pass were higher ball contact of the server, reception in zone 1, receiver's initial position more to the back of the court and backward receiver movement. Receiver's larger longitudinal displacements and an initial position more to the back of the court had a strong relationship with the decreasing of the serve-reception efficacy. Receivers' positioning and movement were the factors with the largest impact on the type of pass used and the efficacy of the reception. Reception zone affected the variance in the ball's kinematics (with the exception of the ball's lateral displacement), as well as in the receivers' positioning (distances from the net and from the target). Also the reception zone was associated with the type of pass used by the receiver but not with reception efficacy. Given volleyball's rotation rule, the receiver needs to master receiving in the different reception zones; he/she needs to adapt to the diverse constraints of each zone to maintain performance efficacy. Thus

  17. Relations of competitive state anxiety and efficacy of young volleyball players.

    Science.gov (United States)

    Milavić, Boris; Jurko, Damir; Grgantov, Zoran

    2013-05-01

    With the aim of validating the Competitive State Anxiety Inventory on a population of young Croatian volleyball players, 286 examinees, 106 male and 180 female volleyball players (average age of 16.09+/-1.83), filled out the CSAI-2, constructed by Martens, Vealey, Burton, Bump and Smith (1990)1. Given the fact that all scales of the Competitive State Anxiety Inventory have good homogeneity, reliability and sensitivity, it can be concluded that they represent high-quality measuring instruments for measuring psychological characteristics of young volleyball players. Young male and female volleyball players generally have a moderate level of self-confidence, and their cognitive anxiety is more prominent that somatic anxiety. In order to determine the age and gender differences in somatic and cognitive anxiety and self-confidence, parametric analysis of differences was performed and coefficients of the independent samples t-test were calculated. By analysis of differences according to age, it has been established that female junior players, in relation to female youth players, express a significantly lower level of somatic and cognitive anxiety and a significantly higher level of self-confidence. As opposed to female players, male youth and junior players do not differ in any of the analysed variables. By analysis of differences according to gender, it has been established that male youth players have a significantly higher level of self-confidence in comparison to female youth players. No significant differences were found in the level of competitive anxiety and self-confidence by analysis of variance between different player roles. No significant differences were found by discriminant analysis in somatic and cognitive anxiety, and self-confidence of female volleyball players of different situational efficacy. The group of least efficient male volleyball players is characterized by a very low level of self-confidence, while the most efficient group of volleyball

  18. Isolated and painless (? atrophy of the infraspinatus muscle: left handed versus right handed volleyball players

    Directory of Open Access Journals (Sweden)

    Thiago D. Gonçalves Côelho

    1994-12-01

    Full Text Available The suprascapular nerve originates from the upper trunk of the brachial plexus or less frequently from the root of C5. It runs a short way and crosses the suprascapular notch. It innervates the supraspinatus muscle and the acromioclavicular and glenohumeral joints. Then, it crosses the lateral edge of the spine of the scapula passing through the spinoglenoid notch, and innervates the infraspinatus muscle. These are potential sites of injury to the suprascapular nerve. Three cases of suprascapular nerve entrapment causing an isolated infraspinatus muscle atrophy in volleyball players were studied. It is suggested the hypothesis that the nature of the smash, in which the athlete uses the arm violently, more than does in volleyball service or in the art of reception, is the key to the pathogenesis of the lesion in volleyball players.

  19. Y-balance normative data for female collegiate volleyball players.

    Science.gov (United States)

    Hudson, Christy; Garrison, J Craig; Pollard, Kalyssa

    2016-11-01

    The Lower Quarter Y Balance (YBT-LQ) Test performance varies depending on competitive level, sport, gender, and age; therefore, determining normative scores specific to a population may be helpful in identifying injury-risk thresholds and return-to-play criteria following an injury. The purpose of this study was to determine normative YBT-LQ scores by assessing a subset of female, Division I volleyball players. A descriptive analysis cohort study. Ninety healthy (19.6 ± 1.2 y/o), collegiate female volleyball players. YBT-LQ was measured in 3 distinct directions of anterior (ANT), posteromedial (PM) and posterolateral (PL) on both the dominant and non-dominant limbs. In addition, a one way ANOVA was performed to determine mean group differences of YBT-LQ dominant and non-dominant limb composite score across position. Baseline values for this population were 94.1 ± 6.6% on the dominant limb and 93.9 ± 6.2% on the non-dominant limb. There were no significant differences for YBT-LQ composite scores on dominant (P = 0.867) and non-dominant (P = 0.989) limbs between position. This study identified normative YBT-LQ composite scores for healthy, female, collegiate volleyball players. Participants performed similarly despite their position. Copyright © 2016 Elsevier Ltd. All rights reserved.

  20. Volleyball training of people with hearing impairments

    OpenAIRE

    Poluhová, Adéla

    2015-01-01

    Title: Volleyball training of people with hearing impairments. This thesis describes and characterizes volleyball training of people with hearing impairments. Options for active sports life of people with hearing impairments in the Czech Republic are under the umbrella of Association of the Deaf athletes. Sensory disability does not limit players in physicalperformance,howeverrenders a number of specific needs that must be respected during a training unit. The aim of this thesis is to describ...

  1. Performance Testing of Download Services of COSMC

    Directory of Open Access Journals (Sweden)

    Jiří Horák

    2013-11-01

    Full Text Available The paper presents results of performance tests of download services of Czech Office of Surveying, Mapping and Cadastre according to INSPIRE  requirements. Methodology of testing is explained, including monitoring performance  of reference servers. 26 millions of random requests were generated for each monitored operation, layer and coordinate system. The temporal development of performance indicators are analyzed and discussed. Results of performance tests approve the compliance with INSPIRE qualitative requirements for download services. All monitored services satisfy requirements of latency, capacity and availability. The latency and availability requirements are fulfilled with an abundant reserve. No problems in structure and content of responses were detected.

  2. The Examination of Effect on Anthropometric Characteristics and Motor Activities of Infrastructure Training at Volleyball

    Directory of Open Access Journals (Sweden)

    Özgür DİNÇER

    2015-07-01

    Full Text Available Purpose: The examination of changes at some anthropometric characteristics and motor activities of volleyball players placing 10 - 12 age categories by infrastructure trainings performed periodically. Method: The twenty - nine soccer players from soccer school of Ordu Telekom Sport Club at Altınordu district of Ordu province join ed to this study. The volleyball player s performed trainings half - weekly throughout thirty - sixweek. Pre - test and post - test values of height, weight, triceps, suprailiac, subscapula and abdomen fat, biceps flexion and extension, chest, abdomen, hip, thigh and calf circumstance, upper extremity, upperarm, forearm, inferior extremity, thigh and leg length were measured by anthropometric measure set and fat percentage of body (BF% and body mass index (BMI were calculated by Yuhaz formula. The 20 m. sprint, ball throwing, standing long and vertical jump and flexibility tests were done as motor activity tests by Newtest test system. The difference between pre - test and post - test values was determined by Wilcoxon test at SPSS package programme. Results: The significant differences between pre - test and post - test, biceps flex, biceps ext, chest, abdomen, leg, hip and calf circumstance, inferior extremity and leg length, fat percentage of body (BF%, body mass index (BMI, vertical jump, horizontal jump, 20 m. sprint, flexibility and ball throwing values w ere determined (p<0.05. Conclusion: It was determined that volleyball infrastructure trainings performed periodically at children volleyball players placing at 10 - 12 age categories developed anthropometric characteristics, basic motor activity and performance values of the m .

  3. EFFECTS OF PLYOMETRIC TRAINING ON DYNAMIC BALANCE, HOP DISTANCE AND HAMSTRING QUADRICEPS RATIO IN FEMALE VOLLEYBALL ATHLETES

    Directory of Open Access Journals (Sweden)

    Gülcan HARPUT

    2016-12-01

    Full Text Available The aim of this study was to investigate the effects of plyometric training on dynamic balance, hop distance and hamstring quadriceps ratio in female volleyball athletes. Thirty-four adolescent asymptomatic female volleyball athletes were included in the study. The athletes were randomly allocated into 2 groups. Group 1 received 6-week plyometric training and standard volleyball training. Group 2 received only standard volleyball training. Isokinetic dynamometer was used to measure the hamstring quadriceps ratio (H:Q. Star excursion balance test was used for assessing the dynamic balance and one leg hop test was used for measuring the hop distance. Repeated measures of ANOVA was conducted for statistical analysis. Plyometric training increased balance performance in only non-dominant limb and increased one leg hop distance in both dominant and non-dominant limb in female volleyball players (p<0.05. On the other hand, H:Q ratio of dominant limb was found increased (p=0.04 but it was similar between groups (p=0.39. The plyometric training could be used to enhance atletic performance in female volleyball players.

  4. Strategies for the prevention of volleyball related injuries.

    Science.gov (United States)

    Reeser, J C; Verhagen, E; Briner, W W; Askeland, T I; Bahr, R

    2006-07-01

    Although the overall injury rate in volleyball and beach volleyball is relatively low compared with other team sports, injuries do occur in a discipline specific pattern. Epidemiological research has revealed that volleyball athletes are, in general, at greatest risk of acute ankle injuries and overuse conditions of the knee and shoulder. This structured review discusses both the known and suspected risk factors and potential strategies for preventing the most common volleyball related injuries: ankle sprains, patellar tendinopathy, and shoulder overuse.

  5. Strategies for the prevention of volleyball related injuries

    Science.gov (United States)

    Reeser, J C; Verhagen, E; Briner, W W; Askeland, T I; Bahr, R

    2006-01-01

    Although the overall injury rate in volleyball and beach volleyball is relatively low compared with other team sports, injuries do occur in a discipline specific pattern. Epidemiological research has revealed that volleyball athletes are, in general, at greatest risk of acute ankle injuries and overuse conditions of the knee and shoulder. This structured review discusses both the known and suspected risk factors and potential strategies for preventing the most common volleyball related injuries: ankle sprains, patellar tendinopathy, and shoulder overuse. PMID:16799111

  6. Web Services-Based Test Report Generation

    Institute of Scientific and Technical Information of China (English)

    LUO Ling; BAI Xiaoying

    2005-01-01

    Tests involving a large number of test cases and test scenarios are always time- and effort-intensive, and use ad hoc approaches. Test management is needed to control the complexity and the quality of the testing of large software systems. The reporting mechanism is critical for monitoring the testing progress, analyzing test results, and evaluating the test effectiveness for a disciplined testing process throughout the testing lifecycle. This paper presents an XML-based report generation method for large system testing. The service-oriented architecture enables flexible test report generation, presentation, and exchange to facilitate collaboration in a distributed environment. The results show that proper reporting can effectively improve the visibility of the testing process and that this web-based approach is critical to enhance communication among multiple testing groups.

  7. The Effects of Acoustic Disturbance on Anaerobic Endurance in Female Volleyball Players

    Directory of Open Access Journals (Sweden)

    Sienkiewicz-Dianzenza Edyta

    2015-03-01

    Full Text Available Purpose.The purpose of the study was to assess anaerobic endurance in volleyball players through repeated vertical jump performance under quiet and noisy conditions. Methods. A group of 12 female players aged 19-28 year completed six sets of eight standing vertical jump jumps; jump height and heart rate before and after the protocol were measured in quiet and noisy (fan cheering conditions. Results. Maximum and minimum vertical jump heights were higher and intragroup differences were smaller in noisy than quiet conditions. Conclusions. Vertical jump testing, a measure of physical activity typical of volleyball, is suitable for monitoring training effects. The influence of noise typical during volleyball matches had a positive effect on player performance and anaerobic endurance.

  8. NAGWS Volleyball Rulebook, 1992. Official Rules & Interpretations/Officiating.

    Science.gov (United States)

    American Alliance for Health, Physical Education, Recreation and Dance, Reston, VA. National Association for Girls and Women in Sport.

    The National Association for Girls and Women in Sport (NAGWS) Volleyball Rules, are based on the United States Volleyball Rules, which in turn are adopted from the rules and interpretations of the International Volleyball Federation Rules. Following a foreword by Doris Hardy, NAGWS President, the publication is organized into five sections as…

  9. NAGWS Volleyball Rulebook, 1993. Official Rules & Interpretations/Officiating.

    Science.gov (United States)

    1993

    The National Association for Girls and Women in Sport (NAGWS) Volleyball Rules are based on the United States Volleyball Rules, which in turn are adopted from the rules and interpretations of the International Volleyball Federation Rules. Following a foreword by Robertha Abney, NAGWS President, the publication is organized into six sections as…

  10. Volleyball Guide with Official Rules. July 1971 - July 1973.

    Science.gov (United States)

    Wilde, Jackie, Ed.

    This guide for playing women's volleyball dated July 1971 - July 1973 details rules and standards as well as the Division for Girls and Women's Sports (DGWS) statement of beliefs. Specific articles dealing with teamwork, basic fundamentals, suggestions for beginners, a volleyball mini unit, and volleyball visual aids are included. The booklet…

  11. Biomechanical Assessment of the Strength of Volleyball Players in Different Stages of the Training Macrocycle

    Directory of Open Access Journals (Sweden)

    Śliwa Marcin

    2015-09-01

    Full Text Available Introduction. In order to help volleyball players achieve superior results, their coaches are constantly seeking new training methods. One of the methods used to improve the effectiveness of the training that is being implemented is conducting tests which make it possible to assess the player’s locomotor system in terms of its motor and biomechanical functions. The aim of the study was to determine the torque of the knee flexor and extensor muscles of volleyball players in three stages of the annual macrocycle.

  12. Training reduces catabolic and inflammatory response to a single practice in female volleyball players.

    Science.gov (United States)

    Eliakim, Alon; Portal, Shawn; Zadik, Zvi; Meckel, Yoav; Nemet, Dan

    2013-11-01

    We examined the effect of training on hormonal and inflammatory response to a single volleyball practice in elite adolescent players. Thirteen female, national team level, Israeli volleyball players (age 16.0 ± 1.4 years, Tanner stage 4-5) participated in the study. Blood samples were collected before and immediately after a typical 60 minutes of volleyball practice, before and after 7 weeks of training during the initial phase of the season. Training involved tactic and technical drills (20% of time), power and speed drills (25% of time), interval sessions (25% of time), endurance-type training (15% of time), and resistance training (15% of time). To achieve greater training responses, the study was performed during the early phase (first 7 weeks) of the volleyball season. Hormonal measurements included the anabolic hormones growth hormone (GH), insulin-like growth factor-I (IGF-I) and IGF-binding protein-3, the catabolic hormone cortisol, the proinflammatory marker interleukin-6 (IL-6), and the anti-inflammatory marker IL-1 receptor antagonist. Training led to a significant improvement of vertical jump, anaerobic properties (peak and mean power by the Wingate Anaerobic Test), and predicted VO2max (by the 20-m shuttle run). Volleyball practice, both before and after the training intervention, was associated with a significant increase of serum lactate, GH, and IL-6. Training resulted in a significantly reduced cortisol response ([INCREMENT]cortisol: 4.2 ± 13.7 vs. -4.4 ± 12.3 ng · ml, before and after training, respectively; p volleyball practice. The results suggest that along with the improvement of power and anaerobic and aerobic characteristics, training reduces the catabolic and inflammatory response to exercise.

  13. Stars a nd Little Girls Volleyball Team Force Talon Comparison of Athletes

    Directory of Open Access Journals (Sweden)

    Özgür DİNÇER

    2013-12-01

    Full Text Available Before and after the age of puberty the child's sporting events on a regular basis can provide a healthy development of the physical structure. In this study, by measuring the differences between the different categories determine the forces fighting claw infrastructure athletes, sports clubs who are struggling in different categories for the pursuit of physical development of infrastructure to benef it athletes, national and international athletes in the same age group, the other is intended to inform the people who study this issue by making a comparison. The research group, in the province of Kocaeli, Kocaeli Metropolitan Municipality Sports Club St ars and Little Girls Volleyball Teams in the paper used average age of the athletes (15.1 ± 0.73 and the 10 star girl athletes (12.6 ± 0.69, 10 Little girl are a total of 20 people, including athletes. The data corresponding to the children's training co mputer days, and by informing the application of the test by showing collected. Measurement hand dynamometer (hand grip and realized. Subjects after a 15 - minute warm - up, while standing arm twist the measurement without contact with the body and the arm wa s measured during 15 degree angle to the body. This was again the dominant hand two times and the highest value was used. Data analysis, SPSS 19 package program has been analyzed by Mann - Whitney U test, the mean and standard deviation values are measured . As a reference value P <0.05 was used. Girls 'volleyball team volleyball star claw forces people participated in the study (10, the mean and standard deviation (26.70 ± 3.29, little girls' volleyball team, contact (10, the mean and standard deviation (21.43 ± 5.53 and the p - value (0.011, respectively. A significant difference between the two groups were measured grip strength (P <0,05. Participated in the study, star volleyball player volleyball girls little appears to have higher values than girl s. The reason for this, despite the

  14. Word play, ritual insult, and volleyball in Peru.

    Science.gov (United States)

    Perez, Justin

    2011-01-01

    Many gay men in the popular sectors of Lima, Peru participate in vóley callejero, or street volleyball. The ethnographic data presented in this article describes verbal and corporal mechanisms through which gay identity emerges within the particular context of the street volleyball game, ultimately highlighting the contextual nature of identity. The volleyball players are not just hitting a ball back and forth, they are engaging in a meaningful activity that illuminates intersections of language, sexuality, and identity. Through the manipulation of the street into a volleyball court, the volleyball players create a space conducive to the articulation of particular verbal and embodied practices that index gay identity. The challenge to the regulations of "proper" volleyball through the practice of ritual insulting and the cultivation of gay volleyball technique are playful reconfigurations of gendered practices prominent in the sites where fieldwork was carried out.

  15. A training program to improve neuromuscular indices in female high school volleyball players.

    Science.gov (United States)

    Noyes, Frank R; Barber-Westin, Sue D; Smith, Stephanie T; Campbell, Thomas

    2011-08-01

    The purpose of this study was to determine if a sports-specific training program could improve neuromuscular indices in female high school volleyball players. We combined components from a previously published knee ligament injury prevention intervention program for jump and strength training with additional exercises and drills to improve speed, agility, overall strength, and aerobic conditioning. We hypothesized that this sports-specific training program would lead to significant improvements in neuromuscular indices in high school female volleyball players. Thirty-four athletes (age 14.5 years ± 1.0) participated in the supervised 6-week program, 3 d·wk(-1) for approximately 90-120 minutes per session. The program was conducted on the school's volleyball court and weight room facilities. The athletes underwent a video drop-jump test, multistage fitness test, vertical jump test, and sit-up test before and after training. A significant increase was found in the mean VO2max score (p volleyball programs.

  16. Predicting Volleyball Serve-reception

    Directory of Open Access Journals (Sweden)

    Ana Paulo

    2016-11-01

    Full Text Available Serve and serve-reception performance have predicted success in volleyball. Given the impact of serve-reception on the game, we aimed at understanding what it is in the serve and receiver’s actions that determines the selection of the type of pass used in serve-reception and its efficacy. Four high-level players received jump-float serves from four servers in two reception zones – zone 1 and 5. The ball and the receiver’s head were tracked with two video cameras, allowing 3D world-coordinates reconstruction. Logistic-regression models were used to predict the type of pass used (overhand or underhand and serve-reception efficacy (error, out, or effective from variables related with the serve kinematics and related with the receiver’s on-court positioning and movement. Receivers’ initial position was different when in zone 1 and 5. This influenced the serve-related variables as well as the type of pass used. Strong predictors of using an underhand rather than overhand pass were higher ball contact of the server, reception in zone 1, receiver’s initial position more to the back of the court and backward receiver movement. Receiver’s larger longitudinal displacements and an initial position more to the back of the court had a strong relationship with the decreasing of the serve-reception efficacy. Receivers’ positioning and movement were the factors with the largest impact on the type of pass used and the efficacy of the reception. Reception zone affected the variance in the ball’s kinematics (with the exception of the ball’s lateral displacement, as well as in the receivers’ positioning (distances from the net and from the target. Also the reception zone was associated with the type of pass used by the receiver but not with reception efficacy. Given volleyball’s rotation rule, the receiver needs to master receiving in the different reception zones; he/she needs to adapt to the diverse constraints of each zone to maintain

  17. Evaluation of knee joint proprioception and balance of young female volleyball players: a pilot study.

    Science.gov (United States)

    Şahin, Neşe; Bianco, Antonino; Patti, Antonino; Paoli, Antonio; Palma, Antonio; Ersöz, Gülfem

    2015-02-01

    [Purpose] The main purpose of our study was the evaluation of the effects of long-term volleyball practice on knee joint proprioception and balance of young female athletes. [Subjects and Methods] An observational case-control study was performed. The study enrolled 19 female volleyball players in the experimental group and 19 sedentary counterparts as controls. A Biodex balance system and dynamometer were used for the evaluations. The paired t-test was used to determine the significance of differences between the performance of athletes and controls. [Results] The knee proprioception analysis showed a significant difference at 60° joint position in active and passive tests. A similar trend, but without significance, was found for the 20° joint position. In the postural stability tests both groups showed similar results with no significant differences between them. [Conclusion] In conclusion, the results indicate a significant influence on joint proprioception is elicited by long-term exposure to a team sport like volleyball. However, the postural stability indexes showed similar trends in both groups, highlighting the analogous ontogenesis of the subjects investigated and the low influence of volleyball practice on postural stability.

  18. Rehabilitation protocol for patellar tendinopathy applied among 16- to 19-year old volleyball players.

    Science.gov (United States)

    Biernat, Ryszard; Trzaskoma, Zbigniew; Trzaskoma, Lukasz; Czaprowski, Dariusz

    2014-01-01

    The aim of the study was to investigate the efficacy of rehabilitation protocol applied during competitive period for the treatment of patellar tendinopathy. A total of 28 male volleyball players were divided into two groups. Fifteen from experimental group (E) and 13 from control group (C) fulfilled the same tests 3 times: before the training program started (first measurement), after 12 weeks (second measurement) and after 24 weeks (third measurement). The above-mentioned protocol included the following: USG imagining with color Doppler function, clinical testing, pain intensity evaluation with VISA-P questionnaire, leg muscle strength and power and jumping ability measurements. The key element of the rehabilitation program was eccentric squat on decline board with additional unstable surface. The essential factor of the protocol was a set of preventive functional exercises, with focus on eccentric exercises of hamstrings. Patellar tendinopathy was observed in 18% of the tested young volleyball players. Implementation of the presented rehabilitation protocol with eccentric squat on decline board applied during sports season lowered the pain level of the young volleyball players. Presented rehabilitation protocol applied without interrupting the competitive period among young volleyball players together with functional exercises could be an effective method for the treatment of patellar tendinopathy.

  19. The effects of 6 weeks of preseason skill-based conditioning on physical performance in male volleyball players.

    Science.gov (United States)

    Trajković, Nebojša; Milanović, Zoran; Sporis, Goran; Milić, Vladan; Stanković, Ratko

    2012-06-01

    The purpose of this study was to determine the changes in physical performance after a 6-week skill-based conditioning training program in male competitive volleyball players. Sixteen male volleyball players (mean ± SD: age 22.3 ± 3.7 years, body height 190.7 ± 4.2 cm, and body mass 78.4 ± 4.5 kg) participated in this study. The players were tested for sprinting (5- and 10-m sprint), agility, and jumping performance (the vertical-jump test, the spike-jump test, and the standing broad jump [SBJ]). Compared with pretraining, there was a significant improvement in the 5- and 10-m speed. There were no significant differences between pretraining and posttraining for lower-body muscular power (vertical-jump height, spike-jump height, and SBJ) and agility. Based on our results, it could be concluded that a preseason skill-based conditioning program does not offer a sufficient stimulus for volleyball players. Therefore, a general conditioning and hypertrophy training along with specific volleyball conditioning is necessary in the preseason period for the development of the lower-body strength, agility and speed performance in volleyball players.

  20. Vertical jump performance of professional male and female volleyball players: effects of playing position and competition level.

    Science.gov (United States)

    Sattler, Tine; Hadžić, Vedran; Dervišević, Edvin; Markovic, Goran

    2015-06-01

    Vertical jump (VJ) performance is an important element for successful volleyball practice. The aims of the study were (a) to explore the overall VJ performance of elite volleyball players of both sexes, (b) to explore the differences in VJ performance among different competition levels and different playing positions, and (c) to evaluate the sex-related differences in the role of the arm swing and 3-step approach with arm swing on the jump height. We assessed the VJ capacity in 253 volleyball players (113 males and 140 females) from Slovenian first and second Volleyball Division. The height of squat jump (SJ), countermovement jump, block jump, and attack jump was tested using an Optojump system. We observed significant differences (p ≤ 0.05) in VJ height between different levels of play that were most pronounced in the SJ. Position-related differences in VJ performance were observed in male players between receivers and setters (p ≤ 0.05), whereas in females, VJ performance across different playing positions seems equal. Finally, we found that male players significantly better use the arm swing during VJ than females (p ≤ 0.05), whereas the use of eccentric part of the jump and approach before the spike to improve VJ performance seem to be equally mastered activity in both sexes. These results could assist coaches in the development of jumping performance in volleyball players. Furthermore, presented normative data for jump heights of elite male and female volleyball players could be useful in selection and profiling of young volleyball players.

  1. Physics of volleyball: Spiking with a purpose

    Science.gov (United States)

    Behroozi, F.

    1998-05-01

    A few weeks ago our volleyball coach telephoned me with a problem: How high should a player jump to "spike" a "set" ball so it would clear the net and land at a known distance on the other side of the net?

  2. HIV/AIDS testing sites and locator services

    Data.gov (United States)

    U.S. Department of Health & Human Services — The HIV Testing Sites & Care Services Locator is a first-of-its-kind, location-based search tool that allows you to search for testing services, housing...

  3. A COMPARATIVE STUDY OF PERSONALITY OF INTERNATIONAL VOLLEYBALL PLAYERS OF BRAZIL AND INDIA

    Directory of Open Access Journals (Sweden)

    Govind Kadam

    2010-06-01

    Full Text Available The main objective was to study the personality of the volleyball players of India. All the players of Indian team and the players of Brazil team, who came for FIVB Men Volleyball World Championship held at Pune in August 2009, were selected for the study. They were administered the Cattell’s 16 PF questionnaire. The results wereanalyzed with the help of ‘t’ test which showed that there are significant differences found between Indian volleyball players and Brazilian Volleyball players on seven factors but not on nine factors of 16 PF Questionnaire. Indian players scored high on factor ‘F’, factor ‘I’ and factor ‘M’ whereas Brazilian players have scored high on factor ‘B’, factor ‘G’, factor ‘H’ and factor ‘L’. Indian players scored low on Factor B which means that they tend to be slow to learn and grasp and they were dull as compared with Brazilian team, and gives concrete and literal interpretation. This dullness simply represents poor functioning.

  4. Does the adolescent patellar tendon respond to 5 days of cumulative load during a volleyball tournament?

    Science.gov (United States)

    van Ark, M; Docking, S I; van den Akker-Scheek, I; Rudavsky, A; Rio, E; Zwerver, J; Cook, J L

    2016-02-01

    Patellar tendinopathy (jumper's knee) has a high prevalence in jumping athletes. Excessive load on the patellar tendon through high volumes of training and competition is an important risk factor. Structural changes in the tendon are related to a higher risk of developing patellar tendinopathy. The critical tendon load that affects tendon structure is unknown. The aim of this study was to investigate patellar tendon structure on each day of a 5-day volleyball tournament in an adolescent population (16-18 years). The right patellar tendon of 41 players in the Australian Volleyball Schools Cup was scanned with ultrasound tissue characterization (UTC) on every day of the tournament (Monday to Friday). UTC can quantify structure of a tendon into four echo types based on the stability of the echo pattern. Generalized estimating equations (GEE) were used to test for change of echo type I and II over the tournament days. Participants played between eight and nine matches during the tournament. GEE analysis showed no significant change of echo type percentages of echo type I (Wald chi-square = 4.603, d.f. = 4, P = 0.331) and echo type II (Wald chi-square = 6.070, d.f. = 4, P = 0.194) over time. This study shows that patellar tendon structure of 16-18-year-old volleyball players is not affected during 5 days of cumulative loading during a volleyball tournament. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  5. Technical player profiles related to the physical fitness of young female volleyball players predict team performance.

    Science.gov (United States)

    Dávila-Romero, C; Hernández-Mocholí, M A; García-Hermoso, A

    2015-03-01

    This study is divided into three sequential stages: identification of fitness and game performance profiles (individual player performance), an assessment of the relationship between these profiles, and an assessment of the relationship between individual player profiles and team performance during play (in championship performance). The overall study sample comprised 525 (19 teams) female volleyball players aged 12-16 years and a subsample (N.=43) used to examine study aims one and two was selected from overall sample. Anthropometric, fitness and individual player performance (actual game) data were collected in the subsample. These data were analyzed through clustering methods, ANOVA and independence chi-square test. Then, we investigated whether the proportion of players with the highest individual player performance profile might predict a team's results in the championship. Cluster analysis identified three volleyball fitness profiles (high, medium, and low) and two individual player performance profiles (high and low). The results showed a relationship between both types of profile (fitness and individual player performance). Then, linear regression revealed a moderate relationship between the number of players with a high volleyball fitness profile and a team's results in the championship (R2=0.23). The current study findings may enable coaches and trainers to manage training programs more efficiently in order to obtain tailor-made training, identify volleyball-specific physical fitness training requirements and reach better results during competitions.

  6. Status, problems and future directions of research in volleyball

    Directory of Open Access Journals (Sweden)

    Stankiewicz Błażej

    2013-12-01

    Full Text Available Purpose . To analyse of publications on various aspects of volleyball and identify the most promising areas of research. Material and methods . As information sources were selected journals from different databases, full-text catalogs and libraries. Results . It is noted that the selection and training process of young volleyball players largely determines the level of club and national teams. In this case, the application of modern techniques, systems and approaches to research is a key component of the success of the team and the level of training of talented volleyball players. Found that the combination of sports orientation and quality of life of young people through passion volleyball helps educate conscious attitude towards their health and desire for high professional achievements. Conclusions . Promising areas should be recognized, such as: improving orientation sessions volleyball; biomechanical prerequisites of development and realization of motor actions, adaptation of existing technical facilities for volleyball.

  7. 2011世界杯前后中国女排与主要对手在发球、接发球环节的对比研究%The Contrastive Analysis of Service and Return of Service between Chinese Women's Volleyball Team and Main Opposition Around 2011 World Cup

    Institute of Scientific and Technical Information of China (English)

    李玉龙; 靳小雨; 李凌

    2012-01-01

    Chinese women's volleyball team have obtained the third place at the 2011 World Cup and the admission ticket for the 2012 Olympic games. The following three teams - Italy team, Brazil team and America team are always the main opponents of China in international - level games. China team has been defeated by Japan team for several times. Therefore, in this paper, the above four teams are chosen for analysis. The 13 videos of the key games in 2011 between China and those main opponents were studied from the perspective of the service, return of service in order to find out the advantages and disadvantages of China team and to provide reference for China team in the London Olympic games.%中国女排在2011年女排廿界杯上夺得第三名,并获得2012年奥运会的入场券.意大利队、巴西队、美国队一直都是中国队在国际大赛中的劲敌;日本队曾多次战胜中国队,实力不俗.因此,以上4支球队作为中国女排的主要对手,对中国女排与主要对手在2011年的重要比赛共13场录像,从发球、接发球环节,进行统计、分析,以找出中国女排在该环节的优势和不足,为中国女排在伦敦奥运会中取得更好的成绩提供参考.

  8. Upper Limb Biomechanics During the Volleyball Serve and Spike

    OpenAIRE

    Reeser, Jonathan C.; Fleisig, Glenn S.; Bolt, Becky; Ruan, Mianfang

    2010-01-01

    Background: The shoulder is the third-most commonly injured body part in volleyball, with the majority of shoulder problems resulting from chronic overuse. Hypothesis: Significant kinetic differences exist among specific types of volleyball serves and spikes. Study Design: Controlled laboratory study. Methods: Fourteen healthy female collegiate volleyball players performed 5 successful trials of 4 skills: 2 directional spikes, an off-speed roll shot, and the float serve. Volunteers who were c...

  9. Muscular imbalance and shoulder pain in volleyball attackers.

    OpenAIRE

    Kugler, A.; Krüger-Franke, M; Reininger, S; Trouillier, H H; Rosemeyer, B

    1996-01-01

    OBJECTIVE: In overhead sports such as volleyball, baseball, or tennis shoulder problems are very common. The aim of this study was to identify features which may correlate with shoulder problems in volleyball attackers. METHODS: 30 competitive volleyball attackers (mean age 25 years) were included in the study; 15 were suffering from shoulder pain and 15 had no history of shoulder pain. The results were compared with those of a control group of 15 recreational athletes without any overhead sp...

  10. Muscular imbalance and shoulder pain in volleyball attackers.

    OpenAIRE

    Kugler, A.; Krüger-Franke, M; Reininger, S; Trouillier, H H; Rosemeyer, B

    1996-01-01

    OBJECTIVE: In overhead sports such as volleyball, baseball, or tennis shoulder problems are very common. The aim of this study was to identify features which may correlate with shoulder problems in volleyball attackers. METHODS: 30 competitive volleyball attackers (mean age 25 years) were included in the study; 15 were suffering from shoulder pain and 15 had no history of shoulder pain. The results were compared with those of a control group of 15 recreational athletes without any overhead sp...

  11. 12 CFR 25.24 - Service test.

    Science.gov (United States)

    2010-01-01

    ... retail banking services and the extent and innovativeness of its community development services. (b) Area...; and (2) The innovativeness and responsiveness of community development services. (f)...

  12. 12 CFR 345.24 - Service test.

    Science.gov (United States)

    2010-01-01

    ... extent and innovativeness of its community development services. (b) Area(s) benefited. Community... innovativeness and responsiveness of community development services. (f) Service performance rating. The...

  13. SPORTS SHOES PURCHASE INTENTION AMONG MALAYSIAN VOLLEYBALL PLAYERS VS. NON-VOLLEYBALL PLAYERS: A CONCEPTUAL PAPER

    Directory of Open Access Journals (Sweden)

    GOH PIN SIANG

    2013-12-01

    Full Text Available The purpose of this study is to advance the understanding of volleyball players’ purchase intention toward sport shoes by investigating the relationship between the independent variables (endorsement, advertising, pricing and electronic word-of-mouth and purchase intention. Descriptive research and causal research will be used as the research design, thus questionnaire and experimentation will be used to obtain data. Primary data in this study is attained by distributing the questionnaire to the Malaysian volleyball players throughout several volleyball tournament venues in Malaysia. The experiment will be conducted by comparing two groups of respondents, including volleyball players and non-volleyball players. This study is limited to several independent variables such as endorsement, advertising, pricing and electronic word-of-mouth. This study is significant for marketers for solving the challenges faced in the sport industry. It also helps to identify consumers’ purchase preferences for sport shoes. The marketer would understand more about their targeted customers’ intentions to purchase, thus the sport industry related with sport marketing in Malaysia might gain more profit.

  14. Changes of indicators of high-speed and high-speed and power preparedness at volleyball players of 12–13 years old

    Directory of Open Access Journals (Sweden)

    Oleg Shevchenko

    2016-04-01

    Full Text Available Purpose: to define changes of indicators of high-speed and high-speed and power preparedness of volleyball players of 12–13 years old. Material & Methods: the test exercises, which are recommended by the training program of CYSS on volleyball, were used for the definition of the level of development of high-speed and high-speed and power abilities of volleyball players. 25 young volleyball players from the group of the previous basic preparation took part in the experiment. Sports experience of sportsmen is 3–4 years. The analysis of scientifically-methodical literature, pedagogical testing, pedagogical experiment, methods of mathematical statistics were carried out. Results: the analyzed level of high-speed and high-speed and power abilities of volleyball players. Conclusions: the results had reliable changes (t=2,2–2,4 at р<0,05 of the level of high-speed and high-speed and power abilities of volleyball players of 12–13years old in the experimental group at the end of the experiment, except run on 30 m that demonstrates a positive influence of application of special exercises in the educational-training process.

  15. Analysis of the service of volleyball in female juvenile category in terms of level risk assumed and his efficacy Análisis del saque de voleibol en categoría juvenil femenina en función del nivel de riesgo asumido y su eficacia

    Directory of Open Access Journals (Sweden)

    J. A. Valladares

    2010-09-01

    Full Text Available

    The service, one of the more important actions in volleyball has been conditioned by the experienced evolution by this sport over the past decades, what has brought important changes in the execution of the technique of the service just as in the tactical systems used by the teams. According to an observational model, a methodological proposal developed in five phases has ensued for analysis and assessment of the level of risk that they assume them players of volleyball in juvenile category in the service regarding the obtained efficacy. In that one methodology has been identified and established the variables that affect it, stops at a later time quantifying and examining the level of risk in terms of the kind of service and of the trajectory described all by himself. The obtained data (2.237 cases were examined statistically to come to an end that this category does not appraise a command and control itself enough as if to evidence a tactical obvious intentionality that players would assume a voluntary risk level and once the situation was adapted of the match.
    KEY WORDS: volleyball, service, risk level, efficacy.

     

    La evolución experimentada por el voleibol a lo largo de las últimas décadas ha condicionado en gran medida una de las acciones de juego más importantes, el servicio, lo que ha traído consigo notables cambios en la ejecución técnica del saque, así como en los sistemas tácticos empleados por los equipos. Atendiendo a un modelo observacional, se ha seguido una propuesta metodológica desarrollada en cinco fases para el análisis y valoración del nivel de riesgo que asumen las jugadoras de voleibol en categoría juvenil en el servicio con respecto a la eficacia obtenida. En dicha metodología se han identificado y establecido las variables que lo afectan, para posteriormente cuantificar y

  16. Injury risk management plan for volleyball athletes.

    Science.gov (United States)

    James, Lachlan P; Kelly, Vincent G; Beckman, Emma M

    2014-09-01

    Volleyball is an increasingly popular team sport. As with any competitive sport, there is an inherent risk of injury that must be recognized and collaboratively managed. This article provides a practical approach to the management of volleyball injuries within a team or organization. A brief review of the epidemiological data is presented which establishes (i) ankle sprain, (ii) shoulder overuse injury, (iii) patella tendinopathy, and (iv) anterior cruciate ligament injury as the primary injuries to address amongst these athletes. The interaction of modifiable and non-modifiable risk factors for these injuries are used to classify athletes into high-, medium- and low-risk groups. Targeted training interventions are suggested, based upon the risk level of the athlete, to minimize the occurrence of these injuries. Practical methods for integrating these activities into a training plan are also discussed.

  17. Which skills and factors better predict winning and losing in high-level men's volleyball?

    Science.gov (United States)

    Peña, Javier; Rodríguez-Guerra, Jorge; Buscà, Bernat; Serra, Núria

    2013-09-01

    The aim of this study was to determine which skills and factors better predicted the outcomes of regular season volleyball matches in the Spanish "Superliga" and were significant for obtaining positive results in the game. The study sample consisted of 125 matches played during the 2010-11 Spanish men's first division volleyball championship. Matches were played by 12 teams composed of 148 players from 17 different nations from October 2010 to March 2011. The variables analyzed were the result of the game, team category, home/away court factors, points obtained in the break point phase, number of service errors, number of service aces, number of reception errors, percentage of positive receptions, percentage of perfect receptions, reception efficiency, number of attack errors, number of blocked attacks, attack points, percentage of attack points, attack efficiency, and number of blocks performed by both teams participating in the match. The results showed that the variables of team category, points obtained in the break point phase, number of reception errors, and number of blocked attacks by the opponent were significant predictors of winning or losing the matches. Odds ratios indicated that the odds of winning a volleyball match were 6.7 times greater for the teams belonging to higher rankings and that every additional point in Complex II increased the odds of winning a match by 1.5 times. Every reception and blocked ball error decreased the possibility of winning by 0.6 and 0.7 times, respectively.

  18. Game-Related Performance Factors in four European Men’s Professional Volleyball Championships

    Science.gov (United States)

    Casals, Martí

    2016-01-01

    Abstract The present study was designed to assess the relevance of game-related performance factors as outcome predictors in high-level volleyball. To carry out the analysis, the official box scores of 399 matches played by 47 different teams in four different European male professional volleyball leagues (Italy, Poland, Germany and Turkey) during the 2013-14 regular season were analyzed. A logistic mixed model was performed to determine the effects of different variables in matches’ outcomes. According to the multivariate analysis the following factors were significantly associated with winning matches: the number of scorers (OR = 1.32; CI: 1.09 – 1.59), service errors (OR = 0.91; CI: 0.87 – 0.95), service points (OR = 1.25; CI: 1.15 -1.36), reception errors (OR = 0.79; CI: 0.74 – 0.84), the percentage of positive receptions (OR = 1.02; CI: 1.00 -1.04) and blocked balls (OR = 1.17; CI: 1.11 – 1.26). Team category 2 (OR = 0.39; CI: 0.24 – 0.63) and team category 3 (OR = 0.15; CI: 0.09 – 0.25) were significantly associated with losing matches. These findings can contribute to a better understanding of performance indicators in professional volleyball, helping coaches and decision makers to better determine the importance of particular game factors. PMID:28149426

  19. Perceptual-Cognitive Expertise in Elite Volleyball Players

    Science.gov (United States)

    Alves, Heloisa; Voss, Michelle W.; Boot, Walter R.; Deslandes, Andrea; Cossich, Victor; Salles, Jose Inacio; Kramer, Arthur F.

    2013-01-01

    The goal of the current study was to investigate the relationship between sport expertise and perceptual and cognitive skills, as measured by the component skills approach. We hypothesized that athletes would outperform non-athlete controls in a number of perceptual and cognitive domains and that sport expertise would minimize gender differences. A total of 154 individuals (87 professional volleyball players and 67 non-athlete controls) participated in the study. Participants performed a cognitive battery, which included tests of executive control, memory, and visuo-spatial attention. Athletes showed superior performance speed on three tasks (two executive control tasks and one visuo-spatial attentional processing task). In a subset of tasks, gender effects were observed mainly in the control group, supporting the notion that athletic experience can reduce traditional gender effects. The expertise effects obtained substantiate the view that laboratory tests of cognition may indeed enlighten the sport-cognition relationship. PMID:23471100

  20. Study of attack in college volleyball

    Directory of Open Access Journals (Sweden)

    Yordan Portela Pozo

    2014-03-01

    Full Text Available AbstractThis work is done in order to analyze the positive and negative aspects that affected the performance of the auction action in volleyball players performing this action (in this case male in the Provincial University Games in 2012 in Havana , for which I take as a case study to the players of the University of Information Sciences and its opponents in those games, completing a total of 268 shares auctions in 7 games with a total of 15 September analyzed taking account of changes in the sport of Volleyball university in Cuba, data recorded by an observation sheet previously completed by the authors. The main results in this paper show that the greatest amount of shots that were done in these games were diagonal and a good percentage of positive linear auctions however were few and with very poor results. The primary role of the auction for the game's success is fully confirmed in this work because this action is achieved through many points in the game of volleyball and thus leads to a better result.

  1. Match Analysis in Volleyball: a systematic review

    Directory of Open Access Journals (Sweden)

    Miguel Silva

    2016-03-01

    Full Text Available The present article aims to review the available literature on match analysis in adult male Volleyball. Specific key words "performance analysis", "match analysis", "game analysis", "notational analysis", "tactical analysis", "technical analysis", "outcome" and "skills" were used to search relevant databases (PubMed, Web of Science, SportDiscus, Academic Search Complete and the International Journal of Performance Analysis in Sport. The research was conducted according to PRISMA (Preferred Reporting Items for Systematic reviews and Meta analyses guidelines. Of 3407 studies initially identified, only 34 were fully reviewed, and their outcome measures extracted and analyzed. Studies that fit all inclusion criteria were organized into two levels of analysis, according to their research design (comparative or predictive and depending on the type of variables analyzed (skills and their relationship with success, play position and match phase. Results show that from a methodological point of view, comparative studies where currently complemented with some predictive studies. This predictive approach emerged with the aim to identify the relationship between variables, considering their possible interactions and consequently its effect on team performance, contributing to a better understanding of Volleyball game performance through match analysis. Taking into account the limitations of the reviewed studies, future research should provide comprehensive operational definitions for the studied variables, using more recent samples, and consider integrating the player positions and match phase contexts into the analysis of Volleyball.

  2. The Effect of Specific Sling Exercises on the Functional Movement Screen Score in Adolescent Volleyball Players: A Preliminary Study

    Directory of Open Access Journals (Sweden)

    Linek Paweł

    2016-12-01

    Full Text Available The existing data indicate that the result of the Functional Movement Screen (FMS test influences the likelihood of subsequent injury in professional athletes. Therefore, exercises increasing test scores of the FMS may be useful at various stages of sports activity. This study evaluated the effects of the NEURAC sling exercises method on the FMS test score in teenage volleyball players. The study was conducted on 15 volleyball players aged 14 years. The FMS test was performed three times interspersed with a two-month interval. Between the first and the second assessment, neither additional treatment nor training was applied, while between the second and the third assessment, the participants performed stabilisation exercises based on the NEURAC method. Training was carried out twice a week, for eight weeks. The analysis showed that between the first and the second measurement, no significant differences occurred. The use of specific sling exercises caused a significant improvement in FMS results (p ≤ 0.01 between the first and the third, as well as the second and the third measurement. The applied stabilisation exercises based on the NEURAC method positively influenced the FMS test result in male subjects practicing volleyball. Performance of such exercises also resulted in more than 90% of the subjects having a total FMS test score ≥ 17, which may be important in the prevention of injuries. The preliminary results indicate that this type of exercise should be included in a teenage volleyball training routine.

  3. The Effect of Specific Sling Exercises on the Functional Movement Screen Score in Adolescent Volleyball Players: A Preliminary Study

    Science.gov (United States)

    Saulicz, Edward; Myśliwiec, Andrzej; Wójtowicz, Monika; Wolny, Tomasz

    2016-01-01

    Abstract The existing data indicate that the result of the Functional Movement Screen (FMS) test influences the likelihood of subsequent injury in professional athletes. Therefore, exercises increasing test scores of the FMS may be useful at various stages of sports activity. This study evaluated the effects of the NEURAC sling exercises method on the FMS test score in teenage volleyball players. The study was conducted on 15 volleyball players aged 14 years. The FMS test was performed three times interspersed with a two-month interval. Between the first and the second assessment, neither additional treatment nor training was applied, while between the second and the third assessment, the participants performed stabilisation exercises based on the NEURAC method. Training was carried out twice a week, for eight weeks. The analysis showed that between the first and the second measurement, no significant differences occurred. The use of specific sling exercises caused a significant improvement in FMS results (p ≤ 0.01) between the first and the third, as well as the second and the third measurement. The applied stabilisation exercises based on the NEURAC method positively influenced the FMS test result in male subjects practicing volleyball. Performance of such exercises also resulted in more than 90% of the subjects having a total FMS test score ≥ 17, which may be important in the prevention of injuries. The preliminary results indicate that this type of exercise should be included in a teenage volleyball training routine. PMID:28031760

  4. 12 CFR 563e.24 - Service test.

    Science.gov (United States)

    2010-01-01

    ... the extent and innovativeness of its community development services. (b) Area(s) benefitted. Community... provides community development services; and (2) The innovativeness and responsiveness of...

  5. Relationship between landing strategy and patellar tendinopathy in volleyball

    NARCIS (Netherlands)

    Bisseling, Rob W.; Hof, At L.; Bredeweg, Steef W.; Zwerver, Johannes; Mulder, Theo

    2007-01-01

    Objective: The aetiology of patellar tendinopathy ( jumper's knee) remains unclear. To see whether landing strategy might be a risk factor for the development of this injury, this study examined whether landing dynamics from drop jumps differed among healthy volleyball players ( CON) and volleyball

  6. Relationship between landing strategy and patellar tendinopathy in volleyball

    NARCIS (Netherlands)

    Bisseling, Rob W.; Hof, At L.; Bredeweg, Steef W.; Zwerver, Johannes; Mulder, Theo

    Objective: The aetiology of patellar tendinopathy ( jumper's knee) remains unclear. To see whether landing strategy might be a risk factor for the development of this injury, this study examined whether landing dynamics from drop jumps differed among healthy volleyball players ( CON) and volleyball

  7. NAGWS Volleyball Guide, 1989. Official Rules & Interpretations/Officiating.

    Science.gov (United States)

    American Alliance for Health, Physical Education, Recreation and Dance, Reston, VA. National Association for Girls and Women in Sport.

    This booklet contains the official rules and interpretations for officiating in volleyball competitions. Section 1 states the National Association for Girls and Women in Sport (NAGWS) interscholastic and collegiate volleyball rules for 1989-90. Section 2 presents a summary and descriptions of officiating techniques and mechanics. Study questions…

  8. NAGWS Volleyball Guide 1990: Official Rules & Interpretations/Officiating.

    Science.gov (United States)

    American Alliance for Health, Physical Education, Recreation and Dance, Reston, VA. National Association for Girls and Women in Sport.

    This guide presents the 1990 update of the National Association for Girls & Women in Sport (NAGWS) interscholastic and collegiate volleyball rules. It includes the official U.S. volleyball rules and a summary of rule changes, definitions of skills and fouls, and a summary of penalties. Officiating techniques and mechanics are covered with a…

  9. Relationship between landing strategy and patellar tendinopathy in volleyball

    NARCIS (Netherlands)

    Bisseling, Rob W.; Hof, At L.; Bredeweg, Steef W.; Zwerver, Johannes; Mulder, Theo

    2007-01-01

    Objective: The aetiology of patellar tendinopathy ( jumper's knee) remains unclear. To see whether landing strategy might be a risk factor for the development of this injury, this study examined whether landing dynamics from drop jumps differed among healthy volleyball players ( CON) and volleyball

  10. Effects of Posthypnotic Suggestions on the Overhand Volleyball Serve.

    Science.gov (United States)

    Buckner, Rose; Wynn, Mary Jo

    This study determines effects of posthypnotic suggestions in dealing with attitudinal impediments of students performing the overhand volleyball serve. Subjects were 54 male and female college students enrolled in beginning volleyball. Subjects were assigned either to a control or to an experimental group. After four class sessions, a 10-trial…

  11. Verbal aggressiveness and state anxiety of volleyball players and coaches.

    Science.gov (United States)

    Bekiari, Alexandra; Patsiaouras, Asterios; Kokaridas, Dimitrios; Sakellariou, Kimon

    2006-10-01

    The purpose of the present study was to examine the relation of verbal aggressiveness and state anxiety (somatic, cognitive, and self-confidence) in sports settings based on the ratings by volleyball coaches and their athletes. The sample consisted of volleyball athletes (n=208; 98 men and 110 women) and their coaches (n=20; 16 men and 4 women). Analysis showed that male volleyball players rated somatic anxiety higher and were more affected by the verbal aggressiveness of their coaches than female volleyball players. No mean differences were significant for male and female coaches on somatic or cognitive anxiety, self-confidence, or verbal aggressiveness. Also, correlation between subscale scores for male and female volleyball players and coaches was found. The correlations of verbal aggressiveness with self-confidence and anxiety were positive for these athletes, leading them to better behavior. This relationship needs further examination in sport settings.

  12. The determination of isokinetic performance values of knee joint and Hamstring (flexor/Quadriceps (extensor ratios differences in Volleyball players’

    Directory of Open Access Journals (Sweden)

    Özlem Yenigün

    2008-06-01

    Full Text Available The aim of this study was to determined the values of isokinetic performance in knee joint and the ratios of hamstring/quadriceps (H/Q between volleyball players and controls. 30 male volleyball players (age: 19,46±2,1 and 30 male controls (age: 19,66±2,0 were participated in this study. This study investigated hamstring and quadriceps muscles strength ratio obtained during concentric muscle contraction. The ratio of H/Q muscle strength which was an indicator of normal balance between the knee flexors and extensor and it is important to estimate of the capacity for stabilization of knee joint and the preventation of disability. Knee flexion and extension measurements were tested on biodex system–3 dynamometer in %60, %180 and %300 deg/sec test protocols. The range of motion of knee Joint was evaluated by biodex system–3 dynamometer. There was no statistical difference in the ROM of the knee joint between volleyball players and controls (p>0,05. The isokinetic values of volleyball players were significantly higher than controls (p<0,05. H/Q values must be determined to prevent disability. For the aim of get ready for the season and supply the continuity of performance level increases, preseason isokinetic testing of athletes may be helpful to test for strength imbalance and to determine the correct exercises which is suitable for remove the H/Q disproportion.

  13. Sensorimotor Control of the Shoulder in Professional Volleyball Players with Isolated Infraspinatus Muscle Atrophy.

    Science.gov (United States)

    Contemori, Samuele; Biscarini, Andrea; Botti, Fabio Massimo; Busti, Daniele; Panichi, Roberto; Pettorossi, Vito Enrico

    2017-06-12

    Isolated infraspinatus muscle atrophy (IIMA) only affects the hitting shoulder of overhead-activity athletes, and is caused by suprascapular nerve neuropathy. No study has assessed the static and dynamic stability of the shoulder in overhead professional athletes with IIMA to reveal possible shoulder sensorimotor alterations. To assess the shoulder static stability, dynamic stability, and strength in professional volleyball players with IIMA and in healthy control players. Cross-sectional study. Research laboratory. Twenty-four male professional volleyball players (12 players with diagnosed IIMA and 12 healthy players) recruited from local volleyball teams. Static stability was evaluated with two independent force platforms and dynamic stability was assessed with the "Upper Quarter Y Balance Test". The static stability assessment was conducted in different support (single hand and both hand) and vision (open and closed eyes) conditions. Data from each test were analyzed with ANOVA and paired t-test models, to highlight statistical differences within and between groups. In addition to reduced abduction and external rotation strength, athletes with IIMA consistently demonstrated significant less static (P functional use of the shoulder and predispose it to acute or overuse injuries. The results of this study may help athletic trainers and physical/physiotherapists to prevent shoulder injuries and create specific proprioceptive and neuromuscular training programs.

  14. Effect of creatine supplementation on jumping performance in elite volleyball players.

    Science.gov (United States)

    Lamontagne-Lacasse, Martin; Nadon, Raymond; Goulet E, D B

    2011-12-01

    Jump height is a critical aspect of volleyball players' blocking and attacking performance. Although previous studies demonstrated that creatine monohydrate supplementation (CrMS) improves jumping performance, none have yet evaluated its effect among volleyball players with proficient jumping skills. We examined the effect of 4 wk of CrMS on 1 RM spike jump (SJ) and repeated block jump (BJ) performance among 12 elite males of the Sherbrooke University volleyball team. Using a parallel, randomized, double-blind protocol, participants were supplemented with a placebo or creatine solution for 28 d, at a dose of 20 g/d in days 1-4, 10 g/d on days 5-6, and 5 g/d on days 7-28. Pre- and postsupplementation, subjects performed the 1 RM SJ test, followed by the repeated BJ test (10 series of 10 BJs; 3 s interval between jumps; 2 min recovery between series). Due to injuries (N = 2) and outlier data (N = 2), results are reported for eight subjects. Following supplementation, both groups improved SJ and repeated BJ performance. The change in performance during the 1 RM SJ test and over the first two repeated BJ series was unclear between groups. For series 3-6 and 7-10, respectively, CrMS further improved repeated BJ performance by 2.8% (likely beneficial change) and 1.9% (possibly beneficial change), compared with the placebo. Percent repeated BJ decline in performance across the 10 series did not differ between groups pre- and postsupplementation. In conclusion, CrMS likely improved repeated BJ height capability without influencing the magnitude of muscular fatigue in these elite, university-level volleyball players.

  15. Testing in Service-Oriented Environments

    Science.gov (United States)

    2010-03-01

    multiple web services that interact to provide a capability. Web service or- chestration and web service choreography are two types of composites [13,14...follows form Represents the state-of-the-practice, and is supported by the majority of tools Web service choreography involves cooperating web...a business goal. Choreography (quoting from an BPTrends online column) [15]: The overall process behavior “emerges” from the working of its parts

  16. DIFFERENCES IN MOTOR STATUS OF CHILDREN OF DIFFERENT SEX IN SCHOOL VOLLEYBALL

    Directory of Open Access Journals (Sweden)

    Maja Batez

    2013-07-01

    Full Text Available On a sample of 45 children (25 girls and 20 boys age of 9 to 11, who have been training volleyball (one to three years in the club "Sportisimo pajp" in Novi Sad, were applied four motor tests. The aim of this research was to determine differences in the motor status of children of different sex in the school volleyball. Multivariate analysis of variance (MANOVA determined a statistically significant difference in the whole system of analyzed motor variables depending on the sex on studied sample of child¬ren. Univariate analysis of variance (ANOVA showed that girls had better results in va¬riables of flexibility and agility. Boys are better in standing long jump, while sta¬tistically significant differences between means in the speed of alternative movements between girls and boys the not found.

  17. [Muscular trunk stability in professional and amateur volleyball players].

    Science.gov (United States)

    Miltner, O; Siebert, C; Tschaepe, R; Maus, U; Kieffer, O

    2010-03-01

    The aim of this study was to analyse the efficiency of muscular activity in the trunk stabilisation of professional volleyball players compared to a group of amateur hobby players. The results were compared amongst the groups as well as with a reference group consisting of asymptomatic individuals. The question to be answered was whether or not professional volleyball players possess a characteristic strength profile in their trunk musculature and if differences exist with regard to the individuals' competitive playing level. In this comparative study 12 professional volleyball players (German Bundesliga) and 18 non-professional volleyball players were analysed with regard to their isometric strength profile in all three planes. The reference group was provided by the Proxomed company, which had previously analysed healthy untrained individuals (n = 1045) of various age groups. A sports-specific profile for the musculature of volleyball players revealed a significant reduction in the flexion and rotation strength as well as a well-developed lateral flexion strength (highly significant when compared to the reference group). With reference to the level played, better strength values in flexion and lateral flexion were found among the professional athletes. Professional volleyball players present with a characteristic trunk musculature strength profile. A detailed analysis of the muscle strength of the spine as part of a sports medicine work-up could prove helpful in preventing injuries and overuse problems in professional and hobby volleyball players.

  18. Design and validation of an observational instrument for technical and tactical actions in beach volleyball

    Directory of Open Access Journals (Sweden)

    José Manuel Palao

    2015-06-01

    Full Text Available Technical and tactical actions determine performance in beach volleyball. This research develops and tests an instrument to monitor and evaluate the manner of execution and efficacy of the actions in beach volleyball. The purpose of this paper was to design and validate an observational instrument to analyze technical and tactical actions in beach volleyball. The instrument collects information regarding: a information about the match (context, b information about game situations, c information about technical situations (serve, reception, set, attack, block, and court defense in relation to player execution, role, manner of execution, execution zone, and efficacy, and d information about the result of the play (win-lose and way point is obtained. Instrument design and validation was done in seven stages: a review of literature and consultation of experts; b pilot observation and data analysis; c expert review of instrument (qualitative and quantitative evaluation; d observer training test; e expert review of instrument (content validity; f measurement of the ability of the instrument to discriminate the result of the set; and g measurement of the ability of the instrument to differentiate between competition age groups. The results show that the instrument allows for obtaining objective and valid information about the players and team from offensive and defensive technical and tactical actions, as well as indirectly from physical actions. The instrument can be used, in its entirety or partially, for researching and coaching purposes.

  19. DIFFERENCES IN FUNCTIONAL AND MOTOR ABILITIES OFYOUNG FOOTBALL PLAYERS, BASKETBALL AND VOLLEYBALL PLAYERS

    Directory of Open Access Journals (Sweden)

    Franja Fratrić

    2009-11-01

    Full Text Available The main goal of this research is to determine whether and what differences exist between the three groups of subjects (high-quality football, volleyball and basketball cadets and youth age, in the motoric and functional abilities, as well as to identify dif- ferences between subgroups within each sport. The sample consists of 61 volleyball, 31 basketball player and football player 31 (total n = 123 male, cadet and youth age are members of local clubs. Subjects were born between 01.01.1991 and 12.12.1994. The sample of variables are the values of 17 tests for the evaluation of functional and mobile status. The Motor-functional status on the basis of the results of secondary value of foot- ball, basketball and volleyball make a clear conclusion that the football players showed the best results in almost all the tests and that they had the smallest disbalance in the power of certain groups of muscles.The football players hve the highest homogeneity.

  20. Jumping and Landing Techniques in Elite Women’s Volleyball

    Science.gov (United States)

    Tillman, Mark D.; Hass, Chris J.; Brunt, Denis; Bennett, Gregg R.

    2004-01-01

    Volleyball has become one of the most widely played participant sports in the world. Participation requires expertise in many physical skills and performance is often dependent on an individual’s ability to jump and land. The incidence of injury in volleyball is similar to the rates reported for sports that are considered more physical contact sports. Though the most common source of injury in volleyball is the jump landing sequence, little research exists regarding the prevalence of jumping and landing techniques. The purpose of this study was to quantify the number of jumps performed by female volleyball players in competitive matches and to determine the relative frequency of different jump-landing techniques. Videotape recordings of two matches among four volleyball teams were analyzed for this study. Each activity was categorized by jump type (offensive spike or defensive block) and phase (jump or landing). Phase was subcategorized by foot use patterns (right, left, or both). Each of the players averaged nearly 22 jump-landings per game. Foot use patterns occurred in unequal amounts (p < 0.001) with over 50% of defensive landings occurring on one foot. Coaches, physical educators, and recreation providers may utilize the findings of this inquiry to help prevent injuries in volleyball. Key Points The incidence of injury in volleyball is nearly equivalent to injury rates reported for ice hockey and soccer. Most injuries in volleyball occur during the jump landing sequence, but few data exist regarding jump landing techniques for elite female players. Our data indicate that the vast majority of jumps utilize two feet, but approximately half of landings occur with only one foot. Coaches, physical educators, and recreation providers may utilize the findings of this inquiry to prevent possible injuries in athletes, students, or those who participate in volleyball for recreational purposes. PMID:24497818

  1. Estudo dos indicadores de rendimento em voleibol em função do resultado do set Study of performance indicators in male volleyball according to the set results

    Directory of Open Access Journals (Sweden)

    Rui Marcelino

    2010-03-01

    Full Text Available O presente estudo pretendeu identificar possíveis indicadores de rendimento, adstritos às ações de jogo, diferenciadores do resultado obtido no set em Voleibol. A amostra consistiu em 65.949 ações realizadas em 550 sets da Liga Mundial 2005, "adulto" masculinos. A coleta de dados teve como suporte instrumental o software "Volleyball Information System". Para testar as diferenças nos indicadores de rendimento, entre as equipes que vencem e perdem os sets, se utilizou o teste t de student de medidas independentes (p The present study aimed to identify in which performance indicators are there differences between the teams that win and lose the sets in Volleyball matches. Archival data were obtained from 65.949 game actions in 550 sets from the men's 2005 World League. The "Volleyball Information System" was used for data gathering. Descriptive statistics were performed on all variables and the student t -test was used. Kappa of Cohen analysis and percentage of agreement demonstrated good inter-observer reliability which confirmed the accuracy of observations. This study showed that the teams that win their sets have best performance in all game actions (attack, block, serve, dig, set, reception due to higher frequency of point/excellent actions (with the exception of the number of excellent receptions and a lower frequency of errors. The teams that win those sets have a more balanced distribution of points earned between the three terminal actions (attack, block and service than the teams that lose their sets. For the losing teams, the attack represents a greater weight in the total points earned through the terminal actions.

  2. Evaluation of parents’ opinions about children’s orientation to volleyball

    OpenAIRE

    ÇOLAKOGLU, Filiz Fatma; UYGUR, Duran; SENEL, Ender

    2015-01-01

    The aim of this study was to evaluate parents’ views in directing children to volleyball. Parents of students and athletes from Ankara - Keçiören - Tarhuncu Ahm et Paşa Junior High School volleyball school team, Ankara - Çankaya - Anıttepe Junior High School volleyball school team, Başkentgücü Sports Clup volleyball team, Batıkent Yıldızlar Sports Clup Volleyball school, Ankara DSİ Sports Clup volleyball team...

  3. Evaluation of parents’ opinions about children’s orientation to volleyball

    OpenAIRE

    ÇOLAKOGLU, Filiz Fatma; Duran UYGUR; SENEL, Ender

    2014-01-01

    The aim of this study was to evaluate parents’ views in directing children to volleyball. Parents of students and athletes from Ankara - Keçiören - Tarhuncu Ahm et Paşa Junior High School volleyball school team, Ankara - Çankaya - Anıttepe Junior High School volleyball school team, Başkentgücü Sports Clup volleyball team, Batıkent Yıldızlar Sports Clup Volleyball school, Ankara DSİ Sports Clup volleyball team...

  4. Ultrasonographic evaluation of the shoulder in elite Italian beach volleyball players.

    Science.gov (United States)

    Monteleone, G; Tramontana, A; Mc Donald, K; Sorge, R; Tiloca, A; Foti, C

    2015-10-01

    Beach volleyball is an overhead sport that subjects the hitting shoulder to intense functional loads. The purpose of this study is to identify ultrasonographically the prevalence of myotendinous alterations in professional Italian beach volleyball players at the Italian championship and to look for associations between ultrasound findings and the other data collected. Fifty-three beach volleyball players (31 women, 22 men) were recruited during the second stage of the Italian championship held in July 2012 in Rome, Italy. Clinical history was obtained from all subjects, followed by physical exam. Each athlete completed a questionnaire regarding sports activities. Bilateral ultrasonographic evaluation of the shoulders was then performed. Calcific tendinopathy of the rotator cuff of the hitting shoulder was identified ultrasonographically in 30% of the athletes. The mean age of the athletes with calcific tendinopathy was older than subjects with other abnormalities on ultrasonographic examination (33.1 years vs. 25.8 years, t-test; Pvolleyball players has a prevalence of 30% ultrasonographically, greater than that reported in the general population. In these athletes, the presence of calcific tendinopathy correlates positively with age.

  5. Shoulder-Rotator Strength, Range of Motion, and Acromiohumeral Distance in Asymptomatic Adolescent Volleyball Attackers.

    Science.gov (United States)

    Harput, Gulcan; Guney, Hande; Toprak, Ugur; Kaya, Tunca; Colakoglu, Fatma Filiz; Baltaci, Gul

    2016-09-01

    Sport-specific adaptations at the glenohumeral joint could occur in adolescent athletes because they start participating in high-performance sports in early childhood. To investigate shoulder-rotator strength, internal-rotation (IR) and external-rotation (ER) range of motion (ROM), and acromiohumeral distance (AHD) in asymptomatic adolescent volleyball attackers to determine if they have risk factors for injury. Cross-sectional study. University laboratory. Thirty-nine adolescent high school-aged volleyball attackers (22 boys, 17 girls; age = 16.0 ± 1.4 years, height = 179.2 ± 9.0 cm, mass = 67.1 ± 10.9 kg, body mass index = 20.7 ± 2.6 kg/m(2)). Shoulder IR and ER ROM, total-rotation ROM, glenohumeral IR deficit, AHD, and concentric and eccentric strength of the shoulder internal and external rotators were tested bilaterally. External-rotation ROM was greater (t38 = 4.92, P 18°). We observed greater concentric internal-rotator (t38 = 2.89, P = .006) and eccentric external-rotator (t38 = 2.65, P = .01) strength in the dominant than in the nondominant shoulder. The AHD was less in the dominant shoulder (t38 = -3.60, P volleyball attackers demonstrated decreased IR ROM, total ROM, and AHD and increased ER ROM in their dominant shoulder. Therefore, routine screening of adolescent athletes and designing training programs for hazardous adaptive changes could be important in preventing shoulder injuries.

  6. Stature and jumping height are required in female volleyball, but motor coordination is a key factor for future elite success.

    Science.gov (United States)

    Pion, Johan A; Fransen, Job; Deprez, Dieter N; Segers, Veerle I; Vaeyens, Roel; Philippaerts, Renaat M; Lenoir, Matthieu

    2015-06-01

    It was hypothesized that differences in anthropometry, physical performance, and motor coordination would be found between Belgian elite and sub-elite level female volleyball players using a retrospective analysis of test results gathered over a 5-year period. The test sample in this study consisted of 21 young female volleyball players (15.3 ± 1.5 years) who were selected to train at the Flemish Top Sports Academy for Volleyball in 2008. All players (elite, n = 13; sub-elite, n = 8) were included in the same talent development program, and the elite-level athletes were of a high to very high performance levels according to European competition level in 2013. Five multivariate analyses of variance were used. There was no significant effect of playing level on measures of anthropometry (F = 0.455, p = 0.718, (Equation is included in full-text article.)= 0.07), flexibility (F = 1.861, p = 0.188, (Equation is included in full-text article.)= 0.19), strength (F = 1.218, p = 0.355, (Equation is included in full-text article.)= 0.32); and speed and agility (F = 1.176, p = 0.350, (Equation is included in full-text article.)= 0.18). Multivariate analyses of variance revealed significant multivariate effects between playing levels for motor coordination (F = 3.470, p = 0.036, (Equation is included in full-text article.)= 0.59). A Mann-Whitney U test and a sequential discriminant analysis confirmed these results. Previous research revealed that stature and jump height are prerequisites for talent identification in female volleyball. In addition, the results show that motor coordination is an important factor in determining inclusion into the elite level in female volleyball.

  7. Estimating Maximal Heart Rate with the ‘220-Age’ Formula in Adolescent Female Volleyball Players: A Preliminary Study

    Directory of Open Access Journals (Sweden)

    Nikolaidis Pantelis Theodoros

    2014-09-01

    Full Text Available Purpose. Although maximal heart rate (HRmax is used widely to assess exercise intensity in training, there are limited data with regards to the validity of age-based prediction equations of HRmax in volleyball players. Therefore, the aim of the present study was to compare the measured-HRmax of two prediction equations (Fox-HRmax = 220 − age and Tanaka-HRmax = 208 − 0.7 × age in young female volleyball players. Methods. The study involved 47 volleyball players (age 13.39 ± 2.01 years, body mass 54.0 ± 10.8 kg, height 162.7 ± 10.2 cm who performed a graded exercise field test (20 m shuttle run endurance test to assess HRmax. Measured-HRmax values were compared with the Fox and Tanaka prediction equations. Results. The results showed that mean scores for HRmax significantly differed between measured and predicted values (p < 0.001, ŋ2 = 0.49. Post-hoc tests revealed that Fox-HRmax overestimated measured-HRmax (mean difference 5.7 bpm; 95% CI [3.0, 8.5], whereas Tanaka-HRmax was similar to measured-HRmax (-2.2 bpm; 95% CI [-4.9, 0.4]. HRmax did not correlate with age (r = 0.16, p = 0.291. Conclusions. The results of this study failed to validate the widely used ‘220−age’ formula in volleyball players. Coaches and fitness trainers should take into account that the overestimation of HRmax by the Fox equation might lead to prescribing exercise at a higher intensity than what is targeted. Therefore, the Tanaka equation appears to offer a more accurate prediction equation of HRmax than the Fox equation in young female volleyball players.

  8. Anatomical glenohumeral internal rotation deficit and symmetric rotational strength in male and female young beach volleyball players.

    Science.gov (United States)

    Saccol, Michele Forgiarini; Almeida, Gabriel Peixoto Leão; de Souza, Vivian Lima

    2016-08-01

    Beach volleyball is a sport with a high demand of shoulder structures that may lead to adaptations in range of motion (ROM) and strength like in other overhead sports. Despite of these possible alterations, no study evaluated the shoulder adaptations in young beach volleyball athletes. The aim of this study was to compare the bilateral ROM and rotation strength in the shoulders of young beach volleyball players. Goniometric passive shoulder ROM of motion and isometric rotational strength were evaluated in 19 male and 14 female asymptomatic athletes. External and internal ROM, total rotation motion, glenohumeral internal rotation deficit (GIRD), external rotation and internal rotation strength, bilateral deficits and external rotation to internal rotation ratio were measured. The statistical analysis included paired Student's t-test and analysis of variance with repeated measures. Significantly lower dominant GIRD was found in both groups (pvolleyball athletes present symmetric rotational strength and shoulder ROM rotational adaptations that can be considered as anatomical. These results indicate that young practitioners of beach volleyball are subject to moderate adaptations compared to those reported for other overhead sports. Copyright © 2015 Elsevier Ltd. All rights reserved.

  9. ACTN3 R577X polymorphism does not influence explosive leg muscle power in elite volleyball players.

    Science.gov (United States)

    Ruiz, J R; Fernández del Valle, M; Verde, Z; Díez-Vega, I; Santiago, C; Yvert, T; Rodríguez-Romo, G; Gómez-Gallego, F; Molina, J J; Lucia, A

    2011-12-01

    We examined the association of R577X polymorphism (rs1815739) in the α-actinin-3 (ACTN3) gene with "explosive" leg muscle power performance in a group of male and female elite volleyball players (n=66, 31 men, 35 women) and in a group of non-athletic male and female young adults (n=334, 243 men, 91 women). We assessed power performance by means of the vertical squat and counter-movement jump tests. We also determined whether the genotypic frequencies of the ACTN3 R577X genotypes differed between groups. We did not observe any effect of the ACTN3 R577X polymorphism on study phenotypes in both groups, regardless of gender (all P>0.05). Genotype frequencies were similar between volleyball and control groups (P=0.095). Moreover, we did not find an association between the ACTN3 R577X polymorphism and the likelihood of being an elite volleyball player using the dominant (RR vs RX+XX) and the recessive model (RR+RX vs XX). In summary, these findings suggest that the ACTN3 R577X polymorphism does not influence explosive leg muscle power in elite volleyball players.

  10. 78 FR 41128 - Market Test of International Merchandise Return Service

    Science.gov (United States)

    2013-07-09

    ... Market Test of International Merchandise Return Service AGENCY: Postal Regulatory Commission. ACTION... United States Postal Service of Market Test of Experimental Product--International Merchandise Return... returns as an important part of ] international shipping. Id. It concludes that the IMRS-NPR market test...

  11. Comparison of the lower extremities' explosive muscular strength via jumping tests in different performance level and age groups of women volleyball players [Komparace explozivní odrazové síly dolních končetin u výkonnostně a věkově rozdílných skupin hráček volejbalu

    Directory of Open Access Journals (Sweden)

    Daniel Jandačka

    2011-12-01

    Full Text Available BACKGROUND: Sport performance in volleyball is significantly influenced by the quality of the player´s jumping abilities, above all on the height of the jump. Results in jumping tests indirectly indicate information about explosive muscle strength. Information about the quality of the results of jumping tests is the starting point for the monitoring of the athlete’s conditioning. OBJECTIVE: This work´s purpose consists in finding out whether there exist some differences between women volleyball players according to their age and their sport performance level and whether women volleyball players differ from women university students. A secondary aim of the study is to assess the suitability of using three jumping tests in volleyball. METHODS: For the set of women volleyball players (n = 273 divided into five different age and sport performance categories and for the set of university female students (n = 33, three jump tests were applied:the spike jump test SPJ, the counter movement jump test CMJ and the standing broad jump test SBJ. Statistical analysis was done using the Czech STATISTICA system, version 6 (Kolmogorov-Smirnov test, Spearman coefficient correlation, paired t-test and ANOVA for independent samples. RESULTS: Relatively small and mostly statistically insignificant differences have been found between women volleyball players of various age and sport performance groups. All groups of volleyball players significantly exceeded the university students set in the level of their explosive muscle strength. Our research showed a lower level of jump performance, especially in what concerns the highest sport performance of women players. The initial hypotheses about the usefulness of applying three jumping tests in volleyball were confirmed. CONCLUSIONS: The differences in the results of jumping tests for different age and sport performance groups of women volleyball players are small. The relatively lower level of the jumping abilities of

  12. A harmonic oscillator having “volleyball damping”

    Science.gov (United States)

    Mickens, R. E.; Oyedeji, K.; Rucker, S. A.

    2006-05-01

    Volleyball damping corresponds to linear damping up to a certain critical velocity, with zero damping above this value. The dynamics of a linear harmonic oscillator is investigated with this damping mechanism.

  13. Evaluation of parents’ opinions about children’s orientation to volleyball

    Directory of Open Access Journals (Sweden)

    Filiz Fatma ÇOLAKOGLU

    2014-07-01

    Full Text Available The aim of this study was to evaluate parents’ views in directing children to volleyball. Parents of students and athletes from Ankara - Keçiören - Tarhuncu Ahm et Paşa Junior High School volleyball school team, Ankara - Çankaya - Anıttepe Junior High School volleyball school team, Başkentgücü Sports Clup volleyball team, Batıkent Yıldızlar Sports Clup Volleyball school, Ankara DSİ Sports Clup volleyball team, Ank ara Gazi İhtisas Sports Clup volleyball team, KGM Sports Clup volleyball team, Gazi University Sport Clup volleyball team, TVF Fine Arts and Sport High School participated in the study (n=206. Data was collected by using an information form related to par ents’ opinions about children’s orientation to volleyball developed by Şimşek (2005. Data was analyzed in SPSS by using Frequency analysis. Results showed that parents directing their children to volleyball had enough information about the contributions o f sport to children’s development. Some factors effecting children’s orientation to volleyball such as knowledge level of parents about volleyball and a sportive branch, responsibilities, future expectations were revealed in this study.

  14. Assessment of isokinetic muscle function in Korea male volleyball athletes

    OpenAIRE

    Kim, Chang-Gyun; Jeoung, Bog Ja

    2016-01-01

    Volleyball players performed numerous repetitions of spike actions, which uses and requires strong and explosive force, and control of the muscles of the shoulder, lower back, and legs. Muscle imbalance is one of the main causes of sport injuries. The purpose of this study was to assess isokinetic muscle functions in male volleyball players. We thus aim to accurately evaluate their muscle functions, and identify the best training strategy to achieve optimal muscle strength balance in future t...

  15. Towards Automation Design Time Testing of Web Service Compositions

    Directory of Open Access Journals (Sweden)

    Dessislava Petrova-Antonova

    2012-01-01

    Full Text Available Service-Oriented Architectures (SOA allows software applications to interoperate in a new way in distributed environment. Currently, web services are the most widely adopted technology for implementation of SOA. However, they bring a number of challenges to development as well as to testing. Testing web service compositions is one of the major problems in SOA domain that is due to the unknown context, absence of web service source code, multiple provider coordination,lack of tool support, etc. In such context, the paper proposes a framework, named Testing as a Service Software Architecture (TASSA, which aims to provide design time testing of both functional and nonfunctional behavior of web service compositions described with Business Process Execution Language (BPEL. TASSA consists of set of tools that can be used together with existing development environments of service based applications. The paper focuses on an approach for negative testing and unit testing of BPEL processes. The negative testing is supported by TASSA tool, called Fault Injector tool, which implements a fault injection technique providing messagedelays, wrong message data, etc. The goal of unit testing is to test a BPEL process in isolation from its dependent web services. The isolation technique is implemented in another TASSA tool, named Isolation tool.

  16. The effects of 20-m repeated sprint training on aerobic capacity in college volleyball players

    Directory of Open Access Journals (Sweden)

    Kaynak Kerimhan

    2017-02-01

    Full Text Available Study aim: The purpose of this study was to examine the effects of a repeated sprint training program in addition to volleyball training on the aerobic capacity of college volleyball players.

  17. 溯源排球的历史%Tracing the history of Volleyball

    Institute of Scientific and Technical Information of China (English)

    李腾达

    2014-01-01

    排球由于运动量适中,娱乐性强,易于接受,深受各阶层人士的喜爱,在其发展演变过程中又不断分化和繁衍,主要以竞技排球和娱乐排球两条主要的形式展开的。竞技性为主的排球运动主要有,6人制排球、沙滩排球、坐式排球。娱乐性为主的排球主要有软式排球、9人制排球、妈妈排球、盲人排球等。在21世纪第二个十年,排球的发展速度突飞猛进。通过文献法,追溯排球的发展历史,可以让人们更好的去了解排球,去发展排球。%Volleyball with moderate exercise,entertaining and easy to accept,and was deeply loved by people of different social classes, in the process of its development and increasing division and reproduction,mainly competitive volleyball and volleyball two major forms of entertainment.Athletics volleyball are mainly,six people volleyball,beach volleyball,volleyball sitting.Recreational volleyball mainly soft volleyball,nine people mom and volleyball volleyball,volleyball and so on for the blind.In the second decade of the 21st century, the development of volleyball speed by leaps and bounds.Through the literature method,traces the history of volleyball, can make people better to understand volleyball,volleyball to development.

  18. Epidemiology of basketball, soccer, and volleyball injuries in middle-school female athletes.

    Science.gov (United States)

    Barber Foss, Kim D; Myer, Greg D; Hewett, Timothy E

    2014-05-01

    An estimated 30 to 40 million school children participate in sports in the United States; 34% of middle-school participants become injured and seek medical treatment at an annual cost close to $2 billion. The purpose of the current study was to evaluate the injury incidence and rates in female athletes in the middle-school setting during the course of 3 seasons. Female basketball, soccer, and volleyball players were recruited from a single county public school district in Kentucky consisting of 5 middle schools. A total of 268 female athletes (162 basketball, 26 soccer, and 80 volleyball) participated. Athletes were monitored for sports-related injury and number of athlete exposures (AEs) by an athletic trainer. Injury rates were calculated for specific types of injuries within each sport. Injury rates for games and practices were also calculated and compared for each sport. A total of 134 injuries were recorded during the 3 sport seasons. The knee was the most commonly injured body part (99 injuries [73.9%]), of which patellofemoral dysfunction (31.3%), Osgood-Schlatter disease (10.4%), and Sinding-Larsen-Johansson/patella tendinosis (9%) had the greatest incidence. The ankle was the second most commonly injured body part, accounting for 16.4% of all injuries. The overall rates of injury by sport were as follows: soccer, 6.66 per 1000 AEs; volleyball, 3.68 per 1000 AEs; and basketball, 2.86 per 1000 AEs. Female middle-school athletes displayed comparable injury patterns to those seen in their high-school counterparts. Future work is warranted to determine the potential for improved outcomes in female middle-school athletes with access to athletic training services. As the participation levels and number of injuries continue to rise, middle-school athletes demonstrate an increasing need for medical services provided by a certified athletic trainer.

  19. Study on Testing as a Service on Cloud

    Directory of Open Access Journals (Sweden)

    Shruti N. Pardeshi

    2013-03-01

    Full Text Available Software testing is a process used for evaluating anattributes or capability of program and makes surethat it meets the requirements. Now-a-days testingbecomes very important activity in terms ofexposure as well in terms of security, performanceand usability. If we consider hardware and softwarelicenses, the testing is too expensive task for user.As cloud computing providing anything as a service,it gives idea about testing as a service throughwhich customer can save the cost of maintenanceand upgradation.In this paper I have described theTesting As a Service along with its architecture.

  20. Incidence, aetiology and prevention of musculoskeletal injuries in volleyball : A systematic review of the literature

    NARCIS (Netherlands)

    Kilic, O.; Maas, M.; Verhagen, E.; Zwerver, J.; Gouttebarge, V.

    2017-01-01

    Currently, there is no overview of the incidence and (volleyball-specific) risk factors of musculoskeletal injuries among volleyball players, nor any insight into the effect of preventive measures on the incidence of injuries in volleyball. This study aimed to review systematically the scientific

  1. Incidence, aetiology and prevention of musculoskeletal injuries in volleyball : A systematic review of the literature

    NARCIS (Netherlands)

    Kilic, O.; Maas, M.; Verhagen, E.; Zwerver, J.; Gouttebarge, V.

    2017-01-01

    Currently, there is no overview of the incidence and (volleyball-specific) risk factors of musculoskeletal injuries among volleyball players, nor any insight into the effect of preventive measures on the incidence of injuries in volleyball. This study aimed to review systematically the scientific ev

  2. Bridging the Gap in Volleyball. From Basic Instruction to Game Play.

    Science.gov (United States)

    Dawson, Linda; Polvino, Geri

    1982-01-01

    Using volleyball "mini games," which emphasize, one at a time, skills needed to play volleyball, helps students to develop skills needed to play. Mini games described are: (1) forearm pass; (2) overhand pass; (3) overhand pass; (4) overhand serve; (5) mini volleyball; and (6) alternate court set-up. (CJ)

  3. A Novel Testing Model for SOA based Services

    Directory of Open Access Journals (Sweden)

    Abhishek Kumar

    2015-01-01

    Full Text Available SOA (Service-Oriented Architecture filled the gap between software and commercial enterprise. SOA integrates multiple web services. We bear to secure the caliber of web services that gives guarantee about what network services work and their output results. There is close to work has to be performed for an automatic test case generation for SOA based services. But, full coverage of XML elements is missing. To the best of our knowledge this all works do not attempt to cover all possible elements of the XML schema presents in the WSDL file. There is also a need to apply different assertions on each service operation for generating the test cases. To overcome this problem we proposed a novel testing model for SOA based application. This new testing model helps us to get the automatic test cases of SOA based application. We build up our new test model with the aid of our proposed test case generation algorithm and test case selection algorithm. In the end, we generate the test suite execution results and find the coverage of XML schema elements present in the WSDL file.

  4. Testing Metadata Existence of Web Map Services

    Directory of Open Access Journals (Sweden)

    Jan Růžička

    2011-05-01

    Full Text Available For a general user is quite common to use data sources available on WWW. Almost all GIS software allow to use data sources available via Web Map Service (ISO/OGC standard interface. The opportunity to use different sources and combine them brings a lot of problems that were discussed many times on conferences or journal papers. One of the problem is based on non existence of metadata for published sources. The question was: were the discussions effective? The article is partly based on comparison of situation for metadata between years 2007 and 2010. Second part of the article is focused only on 2010 year situation. The paper is created in a context of research of intelligent map systems, that can be used for an automatic or a semi-automatic map creation or a map evaluation.

  5. A Scalable Testing Framework for Location-Based Services

    Institute of Scientific and Technical Information of China (English)

    Jiang Yu; Andrew Tappenden; James Miller; Michael Smith

    2009-01-01

    A novel testing framework for location based services is introduced. In particular, the paper showcases a novel architecture for such a framework. The implementation of the framework illustrates both the functionality and the feasibility of the framework proposed and the utility of the architecture. The new framework is evaluated through comparison to several other methodologies currently available for the testing of location-based applications. A case study is presented in which the testing framework was applied to a typical mobile service tracking system. It is concluded that the proposed testing framework achieves the best coverage of the entire location based service testing problem of the currently available methodologies; being equipped to test the widest array of application attributes and allowing for the automation of testing activities.

  6. Body mass index and body fat percentage are associated with decreased physical fitness in adolescent and adult female volleyball players

    Science.gov (United States)

    Nikolaidis, Pantelis Theo

    2013-01-01

    Background: The objectives of this study were to examine (a) the prevalence of overweight/obesity, and (b) the relationship between body mass index (BMI), body fat percentage (BF) and physical fitness in adolescent and adult female volleyball players. Materials and Methods: Adolescent (n = 102, aged 15.2 ± 2.0 year) and adult (n = 57, 25.9 ± 5.0 year) players were examined for anthropometric characteristics and body composition, and performed the physical working capacity in heart rate 170 min-1 test, a force-velocity test, the Wingate anaerobic test (WAnT), sit-and-reach test (SAR), handgrip strength test (HST) and countermovement vertical jump (CVJ). Results: Based on international BMI cut-off points, 27.5% (n = 28) of adolescent and 12.3% (n = 7) of adult participants were classified as overweight, with the prevalence of overweight being higher in girls than in women (χ2 = 4.90, P = 0.027). BMI was correlated with BF in both age groups (r = 0.72, P volleyball players was higher than in general population, which was a novel finding, suggesting that proper exercise interventions should be developed to target the excess of body mass in youth volleyball clubs. PMID:23900100

  7. A Novel Method to Test Dependable Composed Service Components

    Directory of Open Access Journals (Sweden)

    Khaled Farj

    2016-05-01

    Full Text Available Assessing Web service systems performance and their dependability are crucial for the development of today’s applications. Testing the performance and Fault Tolerance Mechanisms (FTMs of composed service components is hard to be measured at design time due to service instability is often caused by the nature of the network conditions. Using a real internet environment for testing systems is difficult to set up and control. We have introduced a fault injection toolkit that emulates a WAN within a LAN environment between composed service components and offers full control over the emulated environment in addition to the capability to inject network-related faults and application specific faults. The toolkit also generates background workloads on the system under test so as to produce more realistic results. We describe an experiment that has been performed to examine the impact of fault tolerance protocols deployed at a service client by using our toolkit system.

  8. The volleyball athlete's shoulder: biomechanical adaptations and injury associations.

    Science.gov (United States)

    Challoumas, Dimitrios; Stavrou, Antonio; Dimitrakakis, Georgios

    2017-06-01

    In volleyball, the dominant shoulder of the athlete undergoes biomechanical and morphological adaptations; however, definitive conclusions about their exact nature, aetiology, purpose and associations with shoulder injury have not been reached. We present a systematic review of the existing literature describing biomechanical adaptations in the dominant shoulders of volleyball players and factors that may predispose to shoulder pain/injury. A thorough literature search via Medline, EMBASE and SCOPUS was conducted for original studies of volleyball players and 15 eligible articles were identified. Assessment of study quality was performed using the STROBE statement. The reviewed literature supports the existence of a glenohumeral internal rotation deficit (GIRD) and a possible (and less pronounced) external rotation gain in the dominant vs. the non-dominant shoulder of volleyball athletes. Unlike other overhead sports, the GIRD in volleyball athletes appears to be anatomical as a response to the repetitive overhead movements and not to be associated with shoulder pain/injury. Additionally, the dominant shoulder exhibits muscular imbalance, which appears to be a significant risk factor for shoulder pain. Strengthening of the external rotators should be used alongside shoulder stretching and joint mobilisations, core strengthening and optimisation of spike technique as part of injury management and prevention programmes.

  9. Prospective study of injury in volleyball players: 6 year results.

    Science.gov (United States)

    Pastor, M F; Ezechieli, M; Classen, L; Kieffer, O; Miltner, O

    2015-01-01

    The volleyball game has a high complexity and thus entails a lot of strain to the players. Due to this high and different training and competition strain comprehensive and individual training plans should be developed with competing training objectives in order to prevent injuries. The aim of the study was to analyse prospectively over six seasons the acute and overuse injuries of a German male professional volleyball team. The study included 34 male national league players from season the 2007/08 to 2012/13. All players received a sport medicine examination and a functional diagnosis before each season. Based on the results the players received an individual training plan. The players suffered 186 injuries. The prevalence of acute injuries was 1.94 per player and overuse injuries 0.64 per player. The incidence of acute injuries was 3.3/1000 h volleyball and overuse injuries 1.08/1000 h volleyball. The largest number of injuries was found in the spine. The players had most likely minor injuries. The players had significantly fewer injuries in their second season (1.92) than in their first season (3.25; p= 0.004). It could be concluded that volleyball is a sport with a relative low prevalence of injuries compared to other team sports. The prevalence of injury is 2.58 per player. Due to an injury a player dropped out 16.91 days per season. An individual training program seems to reduce the incidence of injury.

  10. an integrated service excellence model for strategic military test and ...

    African Journals Online (AJOL)

    gerhardc

    The purpose of this article is to introduce an Integrated Service Excellence ... processes exist in these facilities without any common quality assurance and control ... provide strategic military test and evaluation facility services and to continuously .... customer satisfaction surveys where customer inputs should be considered.

  11. Role of adolescent female volleyball players' psychophysiological properties and body build in performance of different elements of the game.

    Science.gov (United States)

    Stamm, Raini; Stamm, Meelis; Thomson, Kaivo

    2005-08-01

    Body-build peculiarities (49 body measurements) and psychophysiological properties (21 computerized tests) of 32 adolescent female volleyballers were studied to assess their significance in performance at competitions. Games were recorded by the original computer program Game, and an index of proficiency representative elements of the game was calculated for each player. Regression analysis was applied to predict the best psychophysiological and anthropometric models for serve, reception, block, feint, and attack. Seven tests of psychophysiological indices and 14 anthropometric variables explained 38-98% and 32-83% of skill performance, respectively. Consequently, to improve young volleyball players' performance, everyday coaching should be complemented by detailed assessment of their body build and psychophysiological characteristics.

  12. 2015-2016年中国女排联赛决赛江苏女排失利原因分析%Analysis on Reasons of Failure of Jiangsu Women's Volleyball Team in Final Match In China Women's Volleyball League of 2015 -2016

    Institute of Scientific and Technical Information of China (English)

    赵士杰

    2016-01-01

    2016年1月30日,历时三个月的女排联赛落下帷幕。经过五场艰苦的比赛,天津女排战胜江苏女排夺得冠军。本文通过文献资料法、录像观察法、数据统计法、对比分析法等研究方法,对两队之间的五场比赛进行对比分析,找出江苏女排失利的原因。分析结果认为:江苏女排队员大赛经验、发挥的稳定性与天津女排具有一定的差距;江苏女排一传到位率低、发球稳定性差、进攻组织过于单调、副攻实力偏弱、进攻节奏偏慢,这些都是导致江苏女排失利的重要原因。%The three -month Women's Volleyball League just ends on January 30th,2016.Tianjin women's volleyball team defeats Jiangsu women's volleyball team after five tough games.This essay adapts literature study, video observation,data statistics and comparative analysis to analyze the five games and finds the reasons of failure of the Jiangsu women's volleyball team.The results show that big -match experience and stabilization of Jiangsu women's volleyball players are poorer than that of Tianjin women's volleyball team;meanwhile,the low rate of spot pass,the poor service stability,monotonous attacking forms,the weak strength of the assistant attacker and the slow attacking rhythm are all the important reasons which leads them a failure.

  13. Technical Skills Leading in Winning or Losing Volleyball Matches During Beijing Olympic Games

    Directory of Open Access Journals (Sweden)

    ASTERIOS PATSIAOURAS

    2011-06-01

    Full Text Available Volleyball is included in sports where individual success of final efforts such as a successful attack or aneffective block, is achieved by the harmonious collaboration of the preceded players’ efforts. The purpose of thispresent study was to evaluate the importance of technical skills that led to the success of the national teams thattook part in the Olympic Games of Beijing 2008. The sample was constituted by all the matches of the volleyballmen teams that participated in the Beijing Olympic Games. Overall, 29 games were videotaped and evaluated.Collection of data included the use of the statistical recording program Data Volley 2. The parameters that wereevaluated were: a service, b service reception, c attack, and d attack blocked. The statistical treatment of datawas realised through non parametric statistical analysis. The results showed that, service points, reception errors,and attacks blocked emerged as important factors that were decisive for wining or losing a match

  14. Somatotype, size and body composition of competitive female volleyball players.

    Science.gov (United States)

    Malousaris, Grigoris G; Bergeles, Nikolaos K; Barzouka, Karolina G; Bayios, Ioannis A; Nassis, George P; Koskolou, Maria D

    2008-06-01

    The aim of this study was to describe the morphological characteristics of competitive female volleyball players. For this purpose, body weight and height, breadths and girths as well as skinfold thickness at various body sites were assessed in 163 elite female volleyball players (age: 23.8+/-4.7 years, years of playing: 11.5+/-4.2, hours of training per week: 11.9+/-2.9, means+/-S.D.). Seventy-nine of these players were from the A1 division and the rest from the A2 division of the Greek National League. Two-way ANOVA was used to compare the differences in these characteristics between competition level and playing position. Body height ranged from 161cm to 194cm, and the mean value (177.1+/-6.5cm) was not inferior to that of international players of similar calibre. Adiposity of these players (sum of 5 skinfolds: 51.8+/-10.2mm, percent body fat: 23.4+/-2.8) was higher than that reported in other studies in which, however, different methodology was used. Volleyball athletes of this study were mainly balanced endomorphs (3.4-2.7-2.9). The A1 division players were taller and slightly leaner with greater fat-free mass than their A2 counterparts. Significant differences were found among athletes of different playing positions which are interpreted by their varying roles and physical demands during a volleyball game. The volleyball players who play as opposites were the only subgroup of players differing between divisions; the A2 opposites had more body fat than A1 opposites. These data could be added in the international literature related to the anthropometric characteristics of competitive female volleyball players.

  15. Training strategy of explosive strength in young female volleyball players.

    Science.gov (United States)

    Pereira, Ana; Costa, Aldo M; Santos, Patricia; Figueiredo, Teresa; João, Paulo Vicente

    2015-01-01

    The aim of this study was to examine the effect of an 8-week combined jump and ball throwing training program in the performance of upper and lower extremities among young female volleyball players of the high school. A total of 20 young female volleyball players playing at Scholar Sport in High School at the district level were divided in two groups: the experimental group (n=10; 14.0±0.0 years; 1.6±0.1 m; 52.0±7.0 kg and 20.7±2.4% body mass) and the control group (n=10; 13.8±0.4 years, 1.6±0.1 m; 53.5±4.7 kg and 20.3±1.7% body mass). The experimental group received additional plyometric and ball throwing exercises besides their normal volleyball practice. The control group underwent only their regular session of training. Strength performance in the experimental group significantly improved (medicine ball and volleyball ball throwing: P=0.00; and counter movement jump: P=0.05), with the improvement ranging from 5.3% to 20.1%. No significant changes in strength performance were observed in the control group (P>0.05). The 8-week combined jump and ball throwing training can significantly improve muscular performance in young female volleyball players. These findings may be useful for all physical education teachers and volleyball coaches. Copyright © 2015 Lithuanian University of Health Sciences. Production and hosting by Elsevier Urban & Partner Sp. z o.o. All rights reserved.

  16. Energy availability of female varsity volleyball players.

    Science.gov (United States)

    Woodruff, Sarah J; Meloche, Renee D

    2013-02-01

    Female athletes should aim to achieve energy balance to maintain health and have a high performance output. The purpose of this study was to investigate energy availability (EA) among members of a medium-size Canadian Interuniversity Sport women's volleyball team and to describe exercise energy expenditure (ExEE) during practices, game warm-ups, and games. Total daily energy expenditure was assessed over 7 d using the Bodymedia Sensewear Mini armband, while energy intake (EI) was measured with dietary food logs. Body composition was assessed using air-displacement plethysmography (Bod Pod). Energy availability was calculated using the equation EA = (EI(kcal) - ExEE(kcal))/kg fat-free mass (FFM). Participants consumed 3,435 (±1,172) kcal/day and expended 3479 (± 604) kcal/day. Mean EA was 42.5 kcal·kg FFM(-1) d(-1) across all 7 d, and 2 participants fell below the 30-kcal·kg FFM(-1)·d(-1) threshold. Furthermore, participants expended 511 (± 216), 402 (± 50), and 848 (± 155) kcal during practices, game warm-ups, and games, respectively. Overall, the participants were relatively weight stable and should be encouraged to continue fueling their exercise and high ExEE needs with appropriate nutritional strategies.

  17. ANTHROPOMETRIC AND MOTORIC COMPARISONS BETWEEN THE TWO VOLLEYBALL TEAMS IN PRISHTINA

    Directory of Open Access Journals (Sweden)

    Malsor Gjonbalaj

    2014-06-01

    Full Text Available Introduction: The increase in sports results today not only identifies the quantity (volume and intensity of the work put in, but also the quality (changing the stereotypical notion of effort, eliminating redundant movements, rationalizing the sport in all elements etc. All of these circumstances and factors referred in this paper are stimulated through practical methods for processing positive results and aiming to present a realistic and factual reflection of the current condition, particularly emphasizing the evaluation of several anthropometric and motor characteristics of the players in both volleyball clubs from Prishtina. Methods: These methods are elaborated among arithmetic methods, variance, standard deviation and standard error of the arithmetic mean, the coefficient of variance, the maximum and minimum score test, the score in accordance to the Pearson correlation coefficient-whereas the instruments measured 14 variables such as anthropometric 8, 4 motors and 2 situational. The main purpose to which is addressed in this paper is verifying the situation and the differences between the players in two of the clubs by analyzing the results from the variables I have chosen. Results: The results show that there is a significant differentiation between one volleyball group to the other in terms of motor, anthropometric and situational. This is proven by the results of the data based on the parameters abovementioned. Discussion: Results acquired on in the research, verifies the hypotheses which sets forth previously, it helps to us to understand that the main goal in this research has largely been achieved. Statistical methods that have been processed results may explain the state of anthropometric and motor characteristics. Moreover, with the help of T-test we came to understand the valuable statistical differences between two clubs which have been subject to research. These results are best justified considering the fact that the first

  18. Food Service Worker. Dietetic Support Personnel Achievement Test.

    Science.gov (United States)

    Oklahoma State Dept. of Vocational and Technical Education, Stillwater.

    This guide contains a series of multiple-choice items and guidelines to assist instructors in composing criterion-referenced tests for use in the food service worker component of Oklahoma's Dietetic Support Personnel training program. Test items addressing each of the following occupational duty areas are provided: human relations; personal…

  19. Food Service Supervisor. Dietetic Support Personnel Achievement Test.

    Science.gov (United States)

    Oklahoma State Dept. of Vocational and Technical Education, Stillwater.

    This guide contains a series of multiple-choice items and guidelines to assist instructors in composing criterion-referenced tests for use in the food service supervisor component of Oklahoma's Dietetic Support Personnel training program. Test items addressing each of the following occupational duty areas are provided: human relations; nutrient…

  20. BMP4 and FGF3 haplotypes increase the risk of tendinopathy in volleyball athletes.

    Science.gov (United States)

    Salles, José Inácio; Amaral, Marcus Vinícius; Aguiar, Diego Pinheiro; Lira, Daisy Anne; Quinelato, Valquiria; Bonato, Letícia Ladeira; Duarte, Maria Eugenia Leite; Vieira, Alexandre Rezende; Casado, Priscila Ladeira

    2015-03-01

    To investigate whether genetic variants can be correlated with tendinopathy in elite male volleyball athletes. Case-control study. Fifteen single nucleotide polymorphisms within BMP4, FGF3, FGF10, FGFR1 genes were investigated in 138 elite volleyball athletes, aged between 18 and 35 years, who undergo 4-5h of training per day: 52 with tendinopathy and 86 with no history of pain suggestive of tendinopathy in patellar, Achilles, shoulder, and hip abductors tendons. The clinical diagnostic criterion was progressive pain during training, confirmed by magnetic resonance image. Genomic DNA was obtained from saliva samples. Genetic markers were genotyped using TaqMan real-time PCR. Chi-square test compared genotypes and haplotype differences between groups. Multivariate logistic regression analyzed the significance of covariates and incidence of tendinopathy. Statistical analysis revealed participant age (p=0.005) and years of practice (p=0.004) were risk factors for tendinopathy. A significant association between BMP4 rs2761884 (p=0.03) and tendinopathy was observed. Athletes with a polymorphic genotype have 2.4 times more susceptibility to tendinopathy (OR=2.39; 95%CI=1.10-5.19). Also, association between disease and haplotype TTGGA in BMP4 (p=0.01) was observed. The FGF3 TGGTA haplotype showed a tendency of association with tendinopathy (p=0.05), and so did FGF10 rs900379. FGFR1 showed no association with disease. These findings indicate that haplotypes in BMP4 and FGF3 genes may contribute to the tendon disease process in elite volleyball athletes. Copyright © 2014 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.

  1. Visual- spatial capacity: gender and sport differences in young volleyball and tennis athletes and non-athletes.

    Science.gov (United States)

    Notarnicola, Angela; Maccagnano, Giuseppe; Pesce, Vito; Tafuri, Silvio; Novielli, Grazia; Moretti, Biagio

    2014-01-21

    In the general population visual-spatial ability is better in males, due to the influence of biological and socio-cultural factors. We know that sport activity improves motor skills. The aim of this work is to determine if these gender differences exist in young athletes. The orientation test described by Terzi and standardized by Cesaroni, used to measure spatial ability, was carried out on 60 volleyball or 60 tennis athletes as well as on 60 non-sporting subjects. The data analysis revealed a worse performance for non-athletes in comparison with athletes in both components of test (p volleyball and tennis groups. As far as gender comparison is concerned, as expected in the non- sport group the males presented better values (p volleyball and tennis the specific training is able to develop spatial ability. Besides, boys and girls have similar performance demands and training experience. It appears that this specific training could be responsible for modifying gender differences in performance of spatial ability during adolescence.

  2. A new technique for assessing ball speed and impact force in volleyball.

    Science.gov (United States)

    Shahbazi-Moghaddam, Morteza

    2002-07-01

    This paper presents a description of a simple ballistic pendulum used for assessing ball speed and forces in volleyball. A seven-meter long pendulum with a wooden block of mass 10 kg was constructed and then used in conjunction with a specially designed timer with a precision of 10(-3)s to measure ball speed, pendulum speed and forces exerted to the ball and to the hand. Twelve volleyball players, ranging in ability from beginners to elite (National team) level were used as subjects, and separated into three groups; beginners, university and elite. All subjects performed five services of each kind. Subjects were instructed to jump to the height where the ball and pendulum were hung and hit it against the pendulum as hard as possible. A video camera, Panasonic M9000, was also used for the deviation angle measurement of pendulum. The results showed that highly skilled players receive larger forces and produce higher ball speeds than lower-level athletes.

  3. Effectiveness of PETTLEP imager on performance of passing skill in volleyball.

    Science.gov (United States)

    Afrouzeh, M; Sohrabi, E; Haghkhan, A; Rowshani, F; Goharrokhi, S

    2015-01-01

    This study was conducted to compare the effectiveness of PETTLEP-based imagery, and traditional imagery interventions, on performance of passing skill in volleyball. 36 beginners male volleyball players (Mage =13.5 years, SD=0.55 years) with 5-6 months practice experience were randomly assigned to one of three groups: physical practice + PETTLEP imagery (PP+PI) (N.=15), physical practice + traditional imagery (N.=15), and physical practice only (PP; N.=15). Subjects in the PP+PI group applied the seven components of PETTLEP imagery training; whereas subjects in the PP+TI engaged in a relaxation session before imagery and used response laden motor imagery scripts. The two groups completed 15 minutes of imagery training followed immediately by 13 minutes of "passing" practice three times per week. The PP group completed only 13 minutes of "passing" practice three times per week. Each group performed its respective tasks for 7 weeks. A pre-test took place during the first practice session in which "passing" was assessed. After the 7-week practice program, a post-test took place followed by a retention test, one "no-practice" week later. All groups improved significantly (Pvolleyball when combined with physical practice.

  4. Isokinetic knee strength qualities as predictors of jumping performance in high-level volleyball athletes: multiple regression approach.

    Science.gov (United States)

    Sattler, Tine; Sekulic, Damir; Spasic, Miodrag; Osmankac, Nedzad; Vicente João, Paulo; Dervisevic, Edvin; Hadzic, Vedran

    2016-01-01

    Previous investigations noted potential importance of isokinetic strength in rapid muscular performances, such as jumping. This study aimed to identify the influence of isokinetic-knee-strength on specific jumping performance in volleyball. The secondary aim of the study was to evaluate reliability and validity of the two volleyball-specific jumping tests. The sample comprised 67 female (21.96±3.79 years; 68.26±8.52 kg; 174.43±6.85 cm) and 99 male (23.62±5.27 years; 84.83±10.37 kg; 189.01±7.21 cm) high- volleyball players who competed in 1st and 2nd National Division. Subjects were randomly divided into validation (N.=55 and 33 for males and females, respectively) and cross-validation subsamples (N.=54 and 34 for males and females, respectively). Set of predictors included isokinetic tests, to evaluate the eccentric and concentric strength capacities of the knee extensors, and flexors for dominant and non-dominant leg. The main outcome measure for the isokinetic testing was peak torque (PT) which was later normalized for body mass and expressed as PT/Kg. Block-jump and spike-jump performances were measured over three trials, and observed as criteria. Forward stepwise multiple regressions were calculated for validation subsamples and then cross-validated. Cross validation included correlations between and t-test differences between observed and predicted scores; and Bland Altman graphics. Jumping tests were found to be reliable (spike jump: ICC of 0.79 and 0.86; block-jump: ICC of 0.86 and 0.90; for males and females, respectively), and their validity was confirmed by significant t-test differences between 1st vs. 2nd division players. Isokinetic variables were found to be significant predictors of jumping performance in females, but not among males. In females, the isokinetic-knee measures were shown to be stronger and more valid predictors of the block-jump (42% and 64% of the explained variance for validation and cross-validation subsample, respectively

  5. Considerations on the constitutional type of the central hitter in volleyball

    Directory of Open Access Journals (Sweden)

    Sorin GRĂDINARU

    2017-03-01

    Full Text Available The last major volleyball men competition was within the London 2012 Summer Olympics, which gathered 12 volleyball teams thoroughly selected during trial tournaments. On this occasion, they recorded the evolution of all participants and supplied volleyball methodologists and technicians with data on the various aspects of volleyball game (physical, technical, and tactical. We aimed at establishing the defining elements of a central hitter parameter dynamics in this competition. The subjects of our research were central hitters of all the participating volleyball teams. We also identified central hitters of the “Universitatea” Timişoara men volleyball team. The mean central hitter is, according to the data collected by the specialists of the London 2012 Summer Olympics, 27.93 years old and 203.8 cm tall, and weighs 94 kg. The central hitters of the volleyball team of Russia had particular values in all studied parameters: this position is relevant for the potential of the team and for the high level of the game. The mean values of the studied parameters are relevant in establishing the final hierarchy (Russia, Brazil, and Italy. We found obvious differences between the mean values of these parameters in the men volleyball players participating in the London 2012 Summer Olympics and the men volleyball players of the “Universitatea” Timişoara volleyball team.

  6. Characterization of hip passive stiffness of volleyball, basketball and futsal young athletes.

    Science.gov (United States)

    Lara Araújo, Vanessa; Otoni do Carmo Carvalhais, Viviane; Ribeiro Teles Dos Santos, Thiago; Gomes Pavan Gonçalves, Gabriela; Sales Prado, Luciano; Teixeira Fonseca, Sérgio

    2013-11-01

    (1) To establish the reference values of the test of 'Position of hip passive resistance against gravity' (PHPR) in young athletes; (2) To investigate differences between the values of PHPR test according to athlete's sex, age and sport practiced. Cross-sectional. Sports club. 282 Volleyball, basketball and futsal athletes aged between 10 and 18 years. Hip passive stiffness was measured through PHPR test, which provides indirect information regarding this tissue property; high stiffness means low corresponding test values. The mean values of PHPR test ranged from 0.41 to 1.06°/kg. The test results were different among all age categories and the values were lower in older athletes (pvolleyball athletes had higher values than the male ones (pvolleyball players showed lower values of this property compared with males. Copyright © 2012 Elsevier Ltd. All rights reserved.

  7. Acute Consumption of an Energy Drink Does Not Improve Physical Performance of Female Volleyball Players.

    Science.gov (United States)

    Fernández-Campos, Catalina; Dengo, Ana L; Moncada-Jiménez, José

    2015-06-01

    To determine the acute effect of an energy drink (ED) on physical performance of professional female volleyball players. 19 females (age= 22.3 ± 4.9 yr.; height= 171.8 ± 9.4 cm; weight= 65.2 ± 10.1 kg) participated in a randomized, crossover, double-blind study to measure grip strength, vertical jump and anaerobic power in 3 different sessions (ED, placebo [PL] or no beverage [CTL]). For each session, participants arrived in a fasted state, consumed a standardized breakfast meal, and 1 hr later completed the 3 baseline performance tests without having ingested the beverage. After completing the premeasurements, the athletes drank 6 ml/kg of body weight of the ED or PL and in the CTL condition no beverage was consumed. Posttest measurements were taken 30 min after the ingestion of liquids. A 3 × 2 repeated-measures ANOVA revealed no significant within-session and measurement time interactions for each performance test. Regardless of the measurement time, right hand grip strength was significantly higher in the ED condition (34.6 ± 0.9 kg) compared with PL (33.4 ± 1.1 kg) and CTL (33.6 ± 1.0 kg) (p performance of professional Costa Rican female volleyball players.

  8. Assessment of isokinetic muscle function in Korea male volleyball athletes

    Science.gov (United States)

    Kim, Chang-Gyun; Jeoung, Bog Ja

    2016-01-01

    Volleyball players performed numerous repetitions of spike actions, which uses and requires strong and explosive force, and control of the muscles of the shoulder, lower back, and legs. Muscle imbalance is one of the main causes of sport injuries. The purpose of this study was to assess isokinetic muscle functions in male volleyball players. We thus aim to accurately evaluate their muscle functions, and identify the best training strategy to achieve optimal muscle strength balance in future training programs. The participants in this study consisted of 14 male volleyball players. Muscle strength was measured using the isokinetic dynamometer. Muscle strength was evaluated in terms of peak torque and average power, calculated from five repeated measurements at an angular speed of 60°/sec. Three players who were left attackers showed shoulder imbalance, four players showed trunk joint imbalance, nine players had knee joint of extension/flexion imbalance and four players showed left/right imbalance. The results showed that the number of volleyball players with differences between the strength of the bilateral knee muscles, and between the strength of the hamstrings and quadriceps muscles was higher than the number of players with differences between the strength of the shoulder internal and external rotation muscles, and higher than the number of players with differences between the strength of the lower back extension and flexion muscles. PMID:27807521

  9. Tales of the Unexpected: Coping among Female Collegiate Volleyball Players

    Science.gov (United States)

    Holt, Nicholas L.; Berg, Kylie-Joy; Tamminen, Katherine A.

    2007-01-01

    The purpose of this study was to examine patterns of appraisal, coping, and coping effectiveness in sport. Ten players from a collegiate female volleyball team were interviewed on two occasions, first in the week before a provincial final playoff tournament and in the week following the tournament. Data were transcribed verbatim and subjected to…

  10. Effectiveness of the Call in Beach Volleyball Attacking Play

    Directory of Open Access Journals (Sweden)

    Künzell Stefan

    2014-12-01

    Full Text Available In beach volleyball the setter has the opportunity to give her or his hitter a “call”. The call intends that the setter suggests to her or his partner where to place the attack in the opponent’s court. The effectiveness of a call is still unknown. We investigated the women’s and men’s Swiss National Beach Volleyball Championships in 2011 and analyzed 2185 attacks. We found large differences between female and male players. While men called in only 38.4% of attacks, women used calls in 85.5% of attacks. If the male players followed a given call, 63% of the attacks were successful. The success rate of attacks without any call was 55.8% and 47.6% when the call was ignored. These differences were not significant (χ2(2 = 4.55, p = 0.103. In women’s beach volleyball, the rate of successful attacks was 61.5% when a call was followed, 35% for attacks without a call, and 42.6% when a call was ignored. The differences were highly significant (χ2(2 = 23.42, p < 0.0005. Taking into account the findings of the present study, we suggested that the call was effective in women’s beach volleyball, while its effect in men’s game was unclear. Considering the quality of calls we indicate that there is a significant potential to increase the effectiveness of a call.

  11. Predicting stay/leave behavior among volleyball referees

    NARCIS (Netherlands)

    Van Yperen, N.W.

    1998-01-01

    This study aimed to predict stay/leave behavior among volleyball referees. The predictor variables reflect commitment aspects from the literature: attraction, perceived lack of alternatives, personal investments, and feelings of obligation to remain. Intent to quit was assumed to mediate the link

  12. Foot Posture and Patellar Tendon Pain Among Adult Volleyball Players

    NARCIS (Netherlands)

    de Groot, Reinier; Malliaras, Peter; Munteanu, Shannon; Payne, Craig; Morrissey, Dylan; Maffulli, Nicola

    Objective: We hypothesized that individuals with a normal foot posture would be less likely to experience patellar tendon pain and pathology than those with a pronated or supinated foot. Design: Observational study. Setting: Field-based study among competing athletes. Participants: Volleyball

  13. Nutritional and anthropometric profile of adolescent volleyball athletes

    Directory of Open Access Journals (Sweden)

    Almeida Tania Abreu de

    2003-01-01

    Full Text Available Women's participation in volleyball began in 1928. In 1944, the first Brazilian volleyball championship happened. Flexibility, strength, power, agility and aerobic fitness are all necessary to be a master in this sport. Women's participation in sport activity has increased. However, there are only a few studies in Brazil about nutrition assessment, especially amongst female volleyball players. Therefore, the aim of this study is to assess the dietetic and anthropometric profiles of 25 female adolescent volleyball players of Rio de Janeiro (15-20 years old. Anthropometric assessment was obtained by body mass, stature, skinfold and circumference measurements. Prospective 3-day records, that include two weekdays and one weekend day were analyzed by a Brazilian nutrition software (CIS/EPM, 1993 to obtain the nutrient intake and the results were compared to the American recommendations. The results of anthropometric evaluation showed that athletes had body mass of 64.35 ± 6.12 kg, stature of 1.74 ± 0.06 m and fat mass of 20.51 ± 2.43%. Diets consisted of high energy and protein intake, and low carbohydrate intake. The consumption of calcium, folate and vitamin E was below the recommendations. Since these athletes are going through a period of intense growth and development associated with rigorous training, it becomes, therefore, necessary for them to receive individualized nutritional orientation to improve their performance and quality of life.

  14. Predicting stay/leave behavior among volleyball referees

    NARCIS (Netherlands)

    Van Yperen, N.W.

    1998-01-01

    This study aimed to predict stay/leave behavior among volleyball referees. The predictor variables reflect commitment aspects from the literature: attraction, perceived lack of alternatives, personal investments, and feelings of obligation to remain. Intent to quit was assumed to mediate the link be

  15. Teaching Strategies for the Forearm Pass in Volleyball

    Science.gov (United States)

    Casebolt, Kevin; Zhang, Peng; Brett, Christine

    2014-01-01

    This article shares teaching strategies for the forearm pass in the game of volleyball and identifies how they will help students improve their performance and development of forearm passing skills. The article also provides an assessment rubric to facilitate student understanding of the skill.

  16. Foot posture and patellar tendon pain among adult volleyball players

    NARCIS (Netherlands)

    Groot, R. de; Malliaras, P.; Munteanu, S.; Payne, C.; Morrissey, D.; Maffulli, N.

    2012-01-01

    OBJECTIVE: We hypothesized that individuals with a normal foot posture would be less likely to experience patellar tendon pain and pathology than those with a pronated or supinated foot. DESIGN: Observational study. SETTING: Field-based study among competing athletes. PARTICIPANTS: Volleyball player

  17. Tales of the Unexpected: Coping among Female Collegiate Volleyball Players

    Science.gov (United States)

    Holt, Nicholas L.; Berg, Kylie-Joy; Tamminen, Katherine A.

    2007-01-01

    The purpose of this study was to examine patterns of appraisal, coping, and coping effectiveness in sport. Ten players from a collegiate female volleyball team were interviewed on two occasions, first in the week before a provincial final playoff tournament and in the week following the tournament. Data were transcribed verbatim and subjected to…

  18. Teaching Strategies for the Forearm Pass in Volleyball

    Science.gov (United States)

    Casebolt, Kevin; Zhang, Peng; Brett, Christine

    2014-01-01

    This article shares teaching strategies for the forearm pass in the game of volleyball and identifies how they will help students improve their performance and development of forearm passing skills. The article also provides an assessment rubric to facilitate student understanding of the skill.

  19. Foot Posture and Patellar Tendon Pain Among Adult Volleyball Players

    NARCIS (Netherlands)

    de Groot, Reinier; Malliaras, Peter; Munteanu, Shannon; Payne, Craig; Morrissey, Dylan; Maffulli, Nicola

    2012-01-01

    Objective: We hypothesized that individuals with a normal foot posture would be less likely to experience patellar tendon pain and pathology than those with a pronated or supinated foot. Design: Observational study. Setting: Field-based study among competing athletes. Participants: Volleyball player

  20. "Yes, we can!": Perceptions of collective efficacy sources in volleyball.

    Science.gov (United States)

    Fransen, Katrien; Vanbeselaere, Norbert; Exadaktylos, Vasileios; Vande Broek, Gert; De Cuyper, Bert; Berckmans, Daniel; Ceux, Tanja; De Backer, Maarten; Boen, Filip

    2012-01-01

    Collective efficacy can be defined as a group's shared confidence that they will successfully achieve their goal. We examined which behaviours and events are perceived as sources of collective efficacy beliefs in a volleyball context. In study 1, volleyball coaches from the highest volleyball leagues (n = 33) in Belgium indicated the most important sources of collective efficacy. This list was then adapted based on the literature and on feedback given by an expert focus group, resulting in a 40-item questionnaire. In Study 2, coaches and players from all levels of volleyball in Belgium (n = 2365) rated each of these sources on their predictive value for collective efficacy. A principal component analysis revealed that the 40 sources could be divided into eight internally consistent factors. Positive supportive communication (e.g., enthusiasm after making a point) was identified as the factor most predictive for positive collective efficacy beliefs. The factor referring to the negative emotional reactions of players (e.g., discouraging body language) was the most predictive for negative collective efficacy beliefs. These findings offer a starting point for the design of continuous measurements of collective efficacy through observation.

  1. Using a practical approach for determining the most effective stretching strategy in female college division I volleyball players.

    Science.gov (United States)

    Kruse, Nicholas T; Barr, Marcus W; Gilders, Roger M; Kushnick, Michael R; Rana, Sharon R

    2013-11-01

    The purpose of this investigation was to quantify the effects that a practical bout of static stretching (SS) and dynamic stretching (DS) has on maximal countermovement jump (CMJ) height across a time spectrum of 25 minutes in National Collegiate Athletic Association Division I varsity volleyball players. Eleven female varsity volleyball players (mean ± SD; age 20.00 ± 1.55 years; height 1.78 ± 0.08 m; mass 74.55 ± 12.18 kg) volunteered for this investigation. Three days of randomized experimental testing (SS, DS, control) were completed. The SS protocol consisted of stretching 7 muscle groups. The DS protocol consisted of the volleyball team's actual DS routine of equal duration (30 seconds) to SS. Poststretch performance measures of CMJ were determined at 1, 5, 15, and 25 minutes poststretch. Countermovement jump had an acute significant trial-by-time interaction, indicating that DS was found to produce significantly higher scores than the SS and control session at 1 and 5 minutes poststretch, but not at 15 and 25 minutes poststretch. Additionally, there was a timing interaction within trials where SS scores were significantly lower at 1 minute poststretch compared with 5 and 25 minutes poststretch, and DS scores were significantly higher at 1 and 5 minutes poststretch compared with 15 and 25 minutes poststretch. Athletes engaging in competitive power sports should continue to utilize their DS routine but may need to do so within 5 minutes before activity.

  2. Testing as a Service with HammerCloud

    CERN Document Server

    Medrano Llamas, Ramón; Elmsheuser, Johannes; Legger, Federica; Sciacca, Gianfranco; Sciabà, Andrea; van der Ster, Daniel

    2014-01-01

    HammerCloud was designed and born under the needs of the grid community to test the resources and automate operations from a user perspective. The recent developments in the IT space propose a shift to the software defined data centres, in which every layer of the infrastructure can be offered as a service. Testing and monitoring is an integral part of the development, validation and operations of big systems, like the grid. This area is not escaping the paradigm shift and we are starting to perceive as natural the Testing as a Service (TaaS) offerings, which allow testing any infrastructure service, such as the Infrastructure as a Service (IaaS) platforms being deployed in many grid sites, both from the functional and stressing perspectives. This work will review the recent developments in HammerCloud and its evolution to a TaaS conception, in particular its deployment on the Agile Infrastructure platform at CERN and the testing of many IaaS providers across Europe in the context of experiment requirements....

  3. Pediatric volleyball-related injuries treated in US emergency departments, 1990-2009.

    Science.gov (United States)

    Pollard, Katherine A; Shields, Brenda J; Smith, Gary A

    2011-09-01

    This study describes the epidemiology of pediatric volleyball-related injuries treated in US hospital emergency departments. Data for children younger than 18 years obtained from the National Electronic Injury Surveillance System of the US Consumer Product Safety Commission from 1990 through 2009 were analyzed. An estimated 692 024 volleyball-related injuries to children younger than 18 years occurred during the study period. The annual number of injuries declined significantly by 23% during the study period; however, the annual injury rate remained unchanged, and the number of volleyball-related concussions/closed head injuries increased significantly. Upper (48%) and lower (39%) extremity injuries occurred most frequently, as did strains/sprains (54%). Contact with the net/pole was associated with concussions/closed head injury our findings indicate opportunities for making volleyball an even safer sport for children. Protective padding, complying with US volleyball standards, should cover all volleyball poles and protruding hardware to prevent impact-related injuries.

  4. Nursing care management in the context of the high performance volleyball player

    Directory of Open Access Journals (Sweden)

    Rafael Marcelo Soder

    2015-07-01

    Full Text Available Objective: to understand the relationship between the central phenomenon “care management in the context of the high performance volleyball player: living and surviving in the multidimensionality of the sporting environment” and the categories which involved the perspective of management of health care of the athletes in the context of volleyball. Methods: it is a qualitative study, guided by the Theory Grounded in Data, made between February and September 2013, with 34 participants in three sample groups. Results: four categories were found, meaning care, health and disease concerning the high performance volleyball athlete; living and surviving on the limit between being a high performance athlete and a human being; waking up to the reality of high performance volleyball; unveiling possibilities and potentialities of health care in high performance volleyball. Conclusion: it is evident that there are concrete and tangible possibilities of insertion of the management of health care and nursing in the high performance volleyball.

  5. Comparison of the electromyographic activity, quadriceps: hamstring coactivation ratio and strength changes of dominant leg muscles in collegiate football and volleyball players during different forms of exercises

    Directory of Open Access Journals (Sweden)

    Tanzila Taj

    2015-10-01

    Full Text Available The preliminary study was aimed to compare Electromyographic (EMG activity, Quadriceps: Hamstring coactivation (Q: H ratio and 1- Repetition maximum (RM squat changes of dominant leg muscles in collegiate football and volleyball players during different forms of exercises. Surface EMG analysis was carried out in 24 university level trained male players, football (n=12 and volleyball (n=12 while performing the following exercises: unilateral bridges, lunges, lateral step up to a 20.32 cm (8 inch platform, quadruped arm/ lower extremity lift in the first session. The EMG activities of vastus medialis obliquus (VMO and hamstrings muscles of dominant leg of the players of both groups were recorded using Power Lab EMG system (Lab Chart, AD instruments, ML-818, Australia. On the next session, 1-RM squat tests were also performed on the same players of both groups. In footballers, the lateral step-up, lunges and quadruped arm/ lower extremity lift and in volleyball players, only lunges produced EMG levels greater than 45% maximum voluntary isometric contraction (MVIC in the VMO, which suggests that they may be beneficial for strengthening that muscle. All the exercises produced EMG levels less than 45% MVIC in hamstrings in both groups of players, so they may be more beneficial for training endurance and stabilization. The study also revealed smallest Q: H coactivation ratio in all exercises in volleyball players suggesting more hamstring activity than quadriceps but in footballers, moderate Q:H coactivation ratios were obtained establishing the quadriceps dominant activation in all these exercises. The 1- RM squat testing also showed significantly greater value (p=0.00 in football players than volleyball players. The findings in this study may be used to select specific exercises to enhance a core training program depending on the individual needs of an athlete or as per the requirement of the specific sport.

  6. Identification of types of landings after blocking in volleyball associated with risk of ACL injury.

    Science.gov (United States)

    Zahradnik, David; Jandacka, Daniel; Farana, Roman; Uchytil, Jaroslav; Hamill, Joseph

    2017-03-01

    Landing with a low knee flexion angle after volleyball block jumps may be associated with an increased risk of anterior cruciate ligament (ACL) injury. The aim of the present study was to identify the types of volleyball landings after blocks where the knee flexion angle is found to be under a critical knee flexion angle value of 30° at the instant of the first peak of the ground reaction force (GRF). Synchronized kinematic and kinetic data were collected for each trial. T-tests were used to determine if each knee flexion angle at the instant of the peak GRF was significantly different from the critical value of 30°. A repeated measures ANOVA was used to compare knee flexion angle, time to first peak and the magnitude of the first peak of the resultant GRF and knee stiffness. Significantly lower knee flexion angles were found in the "go" landing (p = .01, ES = 0.6) and the "reverse" landing (p = .02, ES = 0.6) only. The results for knee flexion angle and GRF parameters indicated a significant difference between a "reverse" and "go" and other types of landings, except the "side stick" landing for GRF. The "reverse" and "go" landings may present a risk for ACL injury due to the single-leg landing of these activities that have an associated mediolateral movement.

  7. Somatotype, Level of Competition, and Performance in Attack in Elite Male Volleyball

    Science.gov (United States)

    Giannopoulos, Nikiforos; Vagenas, George; Noutsos, Konstantinos; Barzouka, Karolina; Bergeles, Nikolaos

    2017-01-01

    Abstract This study investigated the relationship between somatotype, level of competition, and performance in attack in elite level male volleyball players. The objective was to test for the potential covariation of competition level (Division A1 vs. A2) and playing position (hitters vs. centers vs. opposites) considering performance in attack. Anthropometric, body composition and somatotype variables were measured according to the Heath-Carter method. The attack actions of 144 players from 48 volleyball matches were analyzed and their performance was rated using a 5-point numerical scale. Results showed that players of Division A1 were taller, heavier, more muscular, and less endomorphic compared to those of Division A2. MANOVA and follow-up discriminant function analysis revealed somatotype differences among playing positions with centers and opposites being endomorph-ectomorph and hitters being central. Centers performed constantly better than hitters and opposites regardless of the division and somatotype. Multiple linear regression analysis showed that variables defining ectomorph and endomorph players, centers, and players of Division A1 significantly determined the relative performance superiority and were able to explain the variation in performance by almost 25%. These results could be taken into account by coaches when assigning players to particular playing positions or when designing individualized position-specific training programs. PMID:28828084

  8. Magnesium status and the physical performance of volleyball players: effects of magnesium supplementation.

    Science.gov (United States)

    Setaro, Luciana; Santos-Silva, Paulo Roberto; Nakano, Eduardo Yoshio; Sales, Cristiane Hermes; Nunes, Newton; Greve, Júlia Maria; Colli, Célia

    2014-01-01

    The aim of this study was to test the hypothesis that magnesium supplementation influences the physical performance of volleyball players, as the efficacy of this approach remains questionable. Twenty-five professional male volleyball players were assigned randomly to experimental (350 mg Mg · d(-1), 4 weeks) and control groups (500 mg maltodextrin · d(-1), 4 weeks) maintaining inter-group homogeneity of urinary magnesium. Erythrocyte, plasma and urinary magnesium levels, plasma creatine kinase activity, lactate production, maximal oxygen uptake (VO2 max) and plyometric (squat jump, countermovement jump, countermovement jump with arm swing) and isokinetic (peak torque, potency and total work) performances were evaluated before (T0) and after (T1) supplementation. Levels of erythrocyte and urinary magnesium and creatine kinase activity and VO2 max remained within normal ranges in both groups. Plasma magnesium decreased significantly only within the experimental group. Significant decreases in lactate production and significant increases (of up to 3 cm) in countermovement jump and countermovement jump with arm swing values were detected in the experimental group following magnesium supplementation, but not in the control group at T1. It is concluded that magnesium supplementation improved alactic anaerobic metabolism, even though the players were not magnesium-deficient.

  9. Tools for in service monitoring and testing of riser to prevent failure and extend service life

    Energy Technology Data Exchange (ETDEWEB)

    Ward, Haakon; Bondevik, Jon Olav; Skjerve, Haavard; Tveit, Oeyvind [SeaFlex AS, Asker (Norway)

    2005-07-01

    Exploration and development of new oil and gas fields is heavily dependant on use of flexible pipes and many field developments would not have been possible without them. The number of flexible risers in service is constantly increasing since relatively few offshore projects have reached the estimated operational life and the operational lifetime of several fields in-service has been extended due to new and improved technology. Many risers have been in service over a large number of years. Some risers have been operated under demanding conditions such as severe dynamic loads, high pressure and temperatures. One may in some cases find that risers actually have shorter service life than estimated in the design phase due to the severe operational conditions. In order to extend the use of the riser, some risers may have to be modified and re-terminated and prepared for a new and less demanding application. In order to operate risers safely, it is important to re-assess the fatigue life in order to prevent potential riser failure. The operator should implement methods and tools for in-service monitoring and testing. This paper addresses efficient and reliable methods and tools for monitoring of critical operational parameters as well as in-service riser testing. A brief description of structural failure modes will also be given in order to understand how to interpret test results in view of potential failure modes. (author)

  10. Physical and physiological attributes of female volleyball players--a review.

    Science.gov (United States)

    Lidor, Ronnie; Ziv, Gal

    2010-07-01

    The main objective of this article was to review a series of studies (n = 31) on physical attributes, physiological attributes, and on-court performances of female volleyball players. Empirical and practical knowledge emerging from studies on training-related issues in volleyball, such as body mass, fat-free mass, aerobic profile, strength, and agility and speed, should be integrated and applied when planning annual training programs for volleyball players. Based on our review, it was found that (a) players of a higher skill level are taller, somewhat heavier, and have higher vertical jump values than players of a lower level; (b) the aerobic profile of female volleyball players is similar to that of female basketball players; (c) ballistic resistance training can increase vertical jump values in female volleyball players; and (d) preseason conditioning should be conducted to prevent fatigue and reduced performance at the beginning of the season. Among the research concerns discussed in the article are that there is a lack data for on-court performance and time-motion analysis in female volleyball players and that more experimental/manipulative studies are needed to examine the effectiveness of different training programs on physiological attributes of female volleyball players. Two practical implications are suggested for volleyball and strength and conditioning coaches: (a) functional and nonfunctional overreaching should be carefully monitored when planning strength and conditioning programs, and (b) volleyball programs should include ballistic-type training.

  11. The VDRL test in a blood transfusion service.

    Science.gov (United States)

    Beal, R W; Merry, D J

    1975-11-01

    A survey has been made of the results of 12 months' VDRL screening in a blood transfusion service. Positive VDRL tests were found on 318 of the 73 350 blood donations collected during 1974. Thirty-four tests confirming specific treponemal infection were found in 24 donors. A battery of confirmatory tests showed the remaining 284 positive VDRL reactions from 235 donors to be biological false positive (BFP) results, and, of these, one-third were considered entirely negative by the reference laboratory. BFP reactions were commoner in female donors than in males, and a higher incidence than expected was observed in younger female donors and older male donors. A marked seasonal incidence was noted, 65% of all BFP tests from the transfusion service being found in the four colder months of May to August. Although some differences exist between the group as a whole and the 36 donors (15.3%) found to have BFP results on more than one occasion during the year, there is little evidence from these studies to suggest that regular blood donation per se is a contributing factor to the finding of a BFP result in VDRL screening. It is probable that the population tested regularly by the blood transfusion service reflects a small but representative sample of the community as a whole.

  12. Investigation Between Japanese Women Volleyball Team And Chinese Women Volleyball Team In The Swiss Women's Volleyball Tournament%2011年瑞士女排精英赛中日两队对比研究

    Institute of Scientific and Technical Information of China (English)

    任汝岗; 靳小雨; 王冬梅

    2012-01-01

    After winning the fifth place at World Grand Prix 2011,Japanese Women Volleyball Team appears with the trend of strong rise,while Chinese Women Volleyball Team has worse performance in many matches so that it's difficult to remain the status of Asia NO.1.Through comparison between two teams,the thesis focuses on main reasons why Japanese Women Volleyball Team improves gradually and Chinese Women Volleyball Team remains underperform.Based on video statistics and data analysis of Japanese Women Volleyball Team(Champion) and Chinese Women Volleyball Team(The third place) on The Swiss Women's Volleyball Tournament in 2011,it turned out that Japanese Women Volleyball Team has better performances on serve,receive,attack and offensive tempo than Chinese Women Volleyball Team.%自2011年世界女排大奖赛获得第5名起,日本女排显现出强势崛起之势,而中国女排则每况愈下,多次比赛战绩不佳,亚洲霸主地位不复存在。通过对2队比较,探索日本女排逐渐上升的原因和中国女排战绩不佳的根本。通过运用录像统计法、数据对比分析法对2011年瑞士女排精英赛冠军日本队与第3名中国队进行比较,结果表明:日本队在发球、接发球、扣球方面都优于中国队,进攻节奏上明显快于中国队。

  13. Development of in-service meter testing (ISMET); Developpement de test de compteurs en service

    Energy Technology Data Exchange (ETDEWEB)

    Ullathorne, D. [BG Technology Ltd. (United Kingdom); Finnerty, G. [BG Transco plc. (United Kingdom)

    2000-07-01

    Managing a population of 19 million meters in the UK is a massive task for Transco, the UK's principal regulated gas transporter. Adopting a cost-effective approach to all aspects of mater work is crucial in today's regulated business environment. It was from a critical review of mater work processes that a need was identified for new test equipment to reinforce the introduction of a mater re-use policy. This would reduce mater transportation and refurbishment costs. BG Technology and Transco have jointly developed some low cost equipment suitable for testing residential gas meters used by Transco's Competent Person (TCP) workforce or by trained local depot operatives. The test equipment can determine whether the meter meets the national requirements for registration performance and hence can be re-used without refurbishment at central workshops. The equipment has been shown to be technically feasible in the laboratory. Field testing has allowed rapid development of working prototypes and provided a basis for conducting simple inter-rig comparison to verify the acceptability of the test method. The pilot trial has shown that the project objectives have been met, in providing low cost test equipment for widespread use by properly trained personnel. (authors)

  14. HIV testing and linkage to services for youth

    Directory of Open Access Journals (Sweden)

    Ann E Kurth

    2015-02-01

    Full Text Available Introduction: HIV testing is the portal to serostatus knowledge that can empower linkage to care for HIV treatment and HIV prevention. However, young people's access to HIV testing is uneven worldwide. The objective of this paper is to review the context and concerns faced by youth around HIV testing in low- as well as high-income country settings. Discussion: HIV testing is a critical entry point for primary and secondary prevention as well as care and treatment for young people including key populations of vulnerable youth. We provide a framework for thinking about the role of testing in the continuum of prevention and care for young people. Brief case study examples from Kenya and the US illustrate some of the common barriers and issues involved for young people. Conclusions: Young people worldwide need more routine access to HIV testing services that effectively address the developmental, socio-political and other issues faced by young women and men.

  15. Automatic WSDL-guided Test Case Generation for PropEr Testing of Web Services

    Directory of Open Access Journals (Sweden)

    Konstantinos Sagonas

    2012-10-01

    Full Text Available With web services already being key ingredients of modern web systems, automatic and easy-to-use but at the same time powerful and expressive testing frameworks for web services are increasingly important. Our work aims at fully automatic testing of web services: ideally the user only specifies properties that the web service is expected to satisfy, in the form of input-output relations, and the system handles all the rest. In this paper we present in detail the component which lies at the heart of this system: how the WSDL specification of a web service is used to automatically create test case generators that can be fed to PropEr, a property-based testing tool, to create structurally valid random test cases for its operations and check its responses. Although the process is fully automatic, our tool optionally allows the user to easily modify its output to either add semantic information to the generators or write properties that test for more involved functionality of the web services.

  16. Kinanthropometric profile of Cuban women Olympic volleyball champions.

    Science.gov (United States)

    Carvajal, Wiliam; Betancourt, Hamlet; León, Sofia; Deturnel, Yanel; Martínez, Miriam; Echevarría, Ivis; Castillo, María Eugenia; Serviat, Noemí

    2012-04-01

    Athletes' kinanthropometric profiles are widely addressed in the scientific literature. Such profiles are particularly important in volleyball because absolute size contributes a significant percentage of total variance associated with athletic success. As in other team sports, volleyball players' kinanthropometric attributes correlate with the game's tactical demands. From 1992 through 2000, the Cuban women's volleyball team achieved top global performance, winning first place in three successive Summer Olympic Games. Describe the kinanthropometric profiles of Cuban women Olympic volleyball champions during 1992-2000 and compare these by position played. Measurements were taken of body composition, somatotype, proportionality and several anthropometric indicators in 41 Cuban women volleyball players, grouped by playing position. All were members of the national team that participated in the Summer Olympic Games in Barcelona (1992), Atlanta (1996) and Sydney (2000). Mean and standard deviations were calculated for all study variables. Analysis of variance was used to compare means for different positions for the variables weight; height; percent adipose, muscle and bone mass; body mass index; and muscle-to-bone ratio. Discriminant analysis was performed to identify anthropometric dimensions differentiating playing positions (center, spiker and setter), using pvolleyball players was balanced mesomorphic (2.7-3.6-2.9). Classified by position, centers (2.9-3.4-3.4) and spikers (2.8-3.6-2.9) presented an average mesomorphic-ectomorphic somatotype, and setters (2.6-3.7-2.6) were balanced mesomorphic. On assessing Somatotype Attitudinal Mean (SAM), centers and spikers showed more intrapositional homogeneity than that of setters. Centers were significantly taller (187.1±2.5 cm) than players in other positions. Centers' percent adipose tissue mass (28.9±2.7%) was significantly higher than that of setters (24.3±2.7%), who were leanest of all positions. The

  17. Points to consider for prioritizing clinical genetic testing services

    DEFF Research Database (Denmark)

    Severin, Franziska; Borry, Pascal; Cornel, Martina C

    2015-01-01

    of prioritization criteria would be desirable. A decision process following the accountability for reasonableness framework was undertaken, including a multidisciplinary EuroGentest/PPPC-ESHG workshop to develop shared prioritization criteria. Resources are currently too limited to fund all the beneficial genetic......Given the cost constraints of the European health-care systems, criteria are needed to decide which genetic services to fund from the public budgets, if not all can be covered. To ensure that high-priority services are available equitably within and across the European countries, a shared set...... testing services available in the next decade. Ethically and economically reflected prioritization criteria are needed. Prioritization should be based on considerations of medical benefit, health need and costs. Medical benefit includes evidence of benefit in terms of clinical benefit, benefit...

  18. Web based aphasia test using service oriented architecture (SOA)

    Energy Technology Data Exchange (ETDEWEB)

    Voos, J A [Clinical Engineering R and D Center, Universidad Tecnologica Nacional, Facultad Regional Cordoba, Cordoba (Argentina); Vigliecca, N S [Consejo Nacional de Investigaciones Cientificas y Tecnicas, CONICET, Cordoba (Argentina); Gonzalez, E A [Clinical Engineering R and D Center, Universidad Tecnologica Nacional, Facultad Regional Cordoba, Cordoba (Argentina)

    2007-11-15

    Based on an aphasia test for Spanish speakers which analyze the patient's basic resources of verbal communication, a web-enabled software was developed to automate its execution. A clinical database was designed as a complement, in order to evaluate the antecedents (risk factors, pharmacological and medical backgrounds, neurological or psychiatric symptoms, brain injury -anatomical and physiological characteristics, etc) which are necessary to carry out a multi-factor statistical analysis in different samples of patients. The automated test was developed following service oriented architecture and implemented in a web site which contains a tests suite, which would allow both integrating the aphasia test with other neuropsychological instruments and increasing the available site information for scientific research. The test design, the database and the study of its psychometric properties (validity, reliability and objectivity) were made in conjunction with neuropsychological researchers, who participate actively in the software design, based on the patients or other subjects of investigation feedback.

  19. The Use of Alcohol Among NCAA Division I Female College Basketball, Softball, and Volleyball Athletes.

    Science.gov (United States)

    Martin, M

    1998-04-01

    To identify and describe alcohol use among NCAA Division I female college basketball, softball, and volleyball players and to determine to what extent the players have been exposed to alcohol or other drug education programs. Mailed self-reporting questionnaire, sample of convenience. The study was conducted in the Department of Physical Education at the University of South Carolina. NCAA Division I athletic trainers of ten female basketball teams, ten female softball teams, and eleven female volleyball teams received questionnaires. A total of 371 participants returned questionnaires: 106 basketball players, 138 softball players, and 127 volleyball players. After reviewing the related literature, I developed a questionnaire and pilot tested it with a group of female swimmers and track and field athletes. The questionnaire consisted of three sections: demographic information, alcohol use, and alcohol education. I analyzed the questionnaires descriptively (frequencies, percentages, and means) and collectively, on the total population, and separately, on all teams. To validate and further understand information gained from the questionnaires, I conducted multiple face-to-face interviews with forty (11%) of the participants. Almost 79% of the subjects consumed alcohol, with light beers being the most popular beverage. Most started using alcohol before 18 years of age. More softball (89.1%) and volleyball (88.9%) athletes reported drinking than did basketball (63.2%) athletes. Quantity and frequency of alcohol use decreased during the competitive sport season but increased out of season. Almost 60% (55.9%) of the participants engaged in binge drinking (defined as four or more drinks per drinking episode) out of season and 35% in season. Female athletes who lived off campus drank more frequently than those who lived in residence halls, but athletes living in residence halls reported drinking in larger quantities. The most common reasons subjects chose not to use alcohol

  20. The Effects of Opposition and Gender on Knee Kinematics and Ground Reaction Force during Landing from Volleyball Block Jumps

    Science.gov (United States)

    Hughes, Gerwyn; Watkins, James; Owen, Nick

    2010-01-01

    The aim of this study was to examine the effect of opposition and gender on knee kinematics and ground reaction force during landing from a volleyball block jump. Six female and six male university volleyball players performed two landing tasks: (a) an unopposed and (b) an opposed volleyball block jump and landing. A 12-camera motion analysis…

  1. An economic evaluation of a proprioceptive balance board training programme for the prevention of ankle sprains in volleyball

    NARCIS (Netherlands)

    Verhagen, E.A.L.M.; Tulder, van M.; Beek, van der A.J.; Bouter, L.M.; Mechelen, van W.

    2005-01-01

    OBJECTIVES: To evaluate the cost effectiveness of a proprioceptive balance board training programme for the prevention of ankle sprains in volleyball. METHODS: A total of 116 volleyball teams participated in this study which was carried out during the 2001-2002 volleyball season. Teams were randomly

  2. An economic evaluation of a proprioceptive balance board training programme for the prevention of ankle sprains in volleyball

    NARCIS (Netherlands)

    Verhagen, E.A.L.M.; Tulder, van M.; Beek, van der A.J.; Bouter, L.M.; Mechelen, van W.

    2005-01-01

    OBJECTIVES: To evaluate the cost effectiveness of a proprioceptive balance board training programme for the prevention of ankle sprains in volleyball. METHODS: A total of 116 volleyball teams participated in this study which was carried out during the 2001-2002 volleyball season. Teams were randomly

  3. The Effects of Opposition and Gender on Knee Kinematics and Ground Reaction Force during Landing from Volleyball Block Jumps

    Science.gov (United States)

    Hughes, Gerwyn; Watkins, James; Owen, Nick

    2010-01-01

    The aim of this study was to examine the effect of opposition and gender on knee kinematics and ground reaction force during landing from a volleyball block jump. Six female and six male university volleyball players performed two landing tasks: (a) an unopposed and (b) an opposed volleyball block jump and landing. A 12-camera motion analysis…

  4. High-Intensity Training Improves Exercise Performance in Elite Women Volleyball Players During a Competitive Season.

    Science.gov (United States)

    Purkhús, Elisabeth; Krustrup, Peter; Mohr, Magni

    2016-11-01

    Purkhús, E, Krustrup, P, and Mohr, M. High-intensity training improves exercise performance in elite women volleyball players during a competitive season. J Strength Cond Res 30(11): 3066-3072, 2016-Elite women volleyball players (n = 25; mean ± SD: age, 19 ± 5 years; height, 171 ± 7 cm; weight, 63 ± 10 kg) volunteered to participate in the study. They were randomized into a high-intensity training (HIT; n = 13) group and a control (CON; n = 12) group. In addition to the normal team training and games, HIT performed 6-10 × 30-seconds all-out running intervals separated by 3-minute recovery periods 3 times per week during a 4-week in-season period whereas CON only completed the team training sessions and games. Preintervention and postintervention, all players completed the arrowhead agility test (AAT), a repeated sprint test (RST; 5 × 30 meters separated by 25 seconds of recovery), and the Yo-Yo Intermittent Recovery level 2 test (Yo-Yo IR2) followed by a-10 minute rest period and the Yo-Yo IR1 test. Mean running distance during HIT in week 1 was 152 ± 4 m and increased (p ≤ 0.05) by 4.6% (159 ± 3 m) in week 4. The AAT performance improved (p ≤ 0.05) by 2.3% (18.87 ± 0.97-18.44 ± 1.06 seconds) and RST by 4.3% postintervention in the HIT group only. Baseline RST fatigue index was 7.0 ± 2.9 and 6.2 ± 5.0% in HIT and CON, respectively, but was lowered (p ≤ 0.05) to 2.7 ± 3.0% posttraining in HIT and remained unaltered in CON (5.5 ± 5.0%). In HIT, Yo-Yo IR2 and Yo-Yo IR1 performance improved by 12.6 and 18.3% postintervention, respectively, with greater (p ≤ 0.05) Yo-yo IR1 change scores than in CON. In conclusion, additional high-intensity in-season training performed as interval running improved agility, repeated sprint ability, and high-intensity intermittent exercise performance in elite women volleyball players.

  5. A Comparison of the Abilities Measured by the Cambridge and Educational Testing Service EFL Test Batteries.

    Science.gov (United States)

    Bachman, Lyle F.; And Others

    1990-01-01

    The abilities measured by the First Certificate of English (FCE) administered by the Cambridge Local Examinations Syndicate are compared with the Test of English as a Foreign Language (TOEFL) administered by the Educational Testing Service. The analyses suggest that the FCE and TOEFL appear to measure the same common aspect of language…

  6. German National Galileo Public Regulated Service (PRS) Testing Activities

    Science.gov (United States)

    Habrich, Heinz; Söhne, Wolfgang

    2013-04-01

    The European Global Navigation System (GNSS) Galileo is going to be established in the near future. Currently, four satellites are in place forming the In-Orbit-Testing (IOT) phase. Within the next years, the constellation will be filled. Full Operational Capability (FOC) will be reached 2019. Beside the Open Service (OS) which is comparable to other OS of existing GNSS, e.g., GPS C/A, there is a so-called Public Regulated Service (PRS) included in the IOT satellites already. The PRS will have improved robustness, i.e. robust signals which will be resistant against involuntary interferences, jamming and spoofing. The PRS signal is encrypted and there will be a restricted access to authorized users, e.g. safety and emergency services, authorities with security task, critical infrastructure organizations etc. The access to the PRS which will be controlled through a special key management will be managed and supervised within the European Union (EU) Member States (MS) by national authorities, the Competent PRS Authority (CPA). But a set of Common Minimum Standards (CMS) will define the minimum requirements applicable to each PRS participant. Nevertheless, each MS is responsible for its national key management. This presentation will inform about the testing activities for Galileo PRS in Germany. The coarse concept for the testing is explained, the schedule is outlined. Finally, the paper will formulate some expectations to the Galileo PRS, e.g. for international cooperation.

  7. Volleyball and emotional health of students of pedagogical university

    Directory of Open Access Journals (Sweden)

    Muskharina Y.Y.

    2013-06-01

    Full Text Available The features of valueological pedagogical influence of volleyball lessons on the emotional state of pedagogical university students. In the experiment involved 96 students aged 18-20 years. It was found that 72% of students feel the satisfaction of most emotional needs during the game, 86.4% indicate a bright splash of feelings and a sense of mutual aid during the game, 24% of students met the best friends among the players section. 89.3% of students say that skill, sense of humor, energy, example and support of teacher (trainer during exercise can affect the emotional state of the team and each student. Professional and personal qualities of the coach, to encourage students to employment volleyball positive impact on the physical, mental performance, improve attention, ability to work in a team, to overcome emotional stress, feelings of fatigue, improves emotional state of students.

  8. The Effect of Physical Biorhythm Cycle on Some Physical Fitness Factors of Adolescent Volleyball Players

    Directory of Open Access Journals (Sweden)

    Ehsan Zareian

    2014-04-01

    Full Text Available Biorhythm is one of the latest topics in the field of identifying mind’s ergonomics. Of all the performances with which biorhythm deals is the physical performance. The purpose of present research is to study the effect of physical cycle of biorhythm on the designated factors of physical fitness among teenage volleyball players in the city of Qom. In the present field research, 30 people were selected out of volleyball players aged 12 to 15 at random in the city of Qom. Biorhythm cycles were obtained with the biorhythm software. Vertical jump and medicine ball throwing were used as tests associating with muscular power; pull-up and sit-up were used as tests associating with muscular endurance in two states of charged (the second position and discharged (the first position of biorhythm physical cycle. The statistical correlated t test with the significance level of p≤0.05 was used to analyze data. The findings indicated that the tests pertaining to power including Vertical jump and medicine ball throwing were well-correlated with the physical cycle of biorhythm (p=0.042; p=0.019. However, the muscular endurance tests (revised sit-up and pull-up did not show any significant difference between the two states and were not correlated with the physical cycle of biorhythm (p=0.75; p=0.73. The predictions by physical cycle of biorhythm on the muscular power of athletes are correct, but it was not possible with the muscular endurance of athletes. Of course, more researches should be conducted to increase the certainty of correctness predicted by the physical cycle of biorhythm. The prediction of this theory can be used to increase the performances of athletes in sports competitions if the biorhythm cycles prove right.

  9. EFFECTS OF PLYOMETRIC VERSUS PILATES EXERCISES ON THE MUSCULAR ABILITY AND COMPONENTS OF JUMPING TO VOLLEYBALL PLAYERS: A COMPARATIVE STUDY

    Directory of Open Access Journals (Sweden)

    Sandipkumar Parekh

    2014-12-01

    Full Text Available Background: The ability to jump plays an effective and important role in volleyball, Because jump skills are greatly complicated that it is nearly the outcome of vertical force and horizontal speed besides harmony and synchronization of the work of arms and feet. There is also total harmony related to the skill and plan achievement during attack and block. The purpose of this study was to examine the Effect of Plyometric VS. Pilates Exercises on the Muscular Ability and Components of Jumping in Volleyball Players. Study Design: Experimental design. Methods: 30 subjects were selected randomly from the population using simple random sampling procedure and were divided into two equal groups. Group A was given plyomeric training and Group B was given Pilate training. Outcome measures were taken before and after the Program Schedule of 3 Sessions alternately in 1 week for 6week. Outcome measures: Vertical Jump height, Block jump, and the attack jump, Agility T test, Results: In Group-A (plyometric and Group-B (Pilate, all data was expressed as mean ± , SD and was statistically analyzed using paired ‘t’ test and independent ‘t’ test to determine the statistical difference among the parameters at 0.5% level of significance. Statistical data of agility t test, vertical jump height, the Block jump, and the attack jump in volley ball players showed that, there was no significantly difference between groups. And both were effective with p<0.05; i.e 95% of significance. Conclusion: In this study, we concluded that both groups (A & B were effective in agility t test, improving vertical jump height, the Block jump, and the attack jump in volley ball players. But we recommend use of plyomertic training in volleyball players.

  10. Cardiovascular and Musculoskeletal Assessment of Elite US Volleyball Players.

    Science.gov (United States)

    Davis, Christopher K; Dyar, Dan A; Vargas, Lisa A; Grossfeld, Paul D

    2015-11-01

    The aim of this study was to characterize the cardiovascular and musculoskeletal systems of elite volleyball players, including aortic dimensions. Previous studies have shown that the upper limit of normal aortic sinus diameter for male and female athletes is 4 and 3.4 cm, respectively. Cross-sectional analysis. United States Olympic Volleyball Training Facility and Rady Children's Hospital San Diego. Seventy (37 male) members of the US national volleyball team. Athletes underwent evaluation that included medical and family histories, targeted physical examinations specifically focusing on abnormalities present in Marfan syndrome (MFS), and transthoracic echocardiograms. Cardiac chamber and great artery size, valve function, and coronary artery origins were assessed. Three male athletes (8%) had an aortic sinus diameter ≥4 cm, one of whom also had an ascending aorta >4 cm. Two female athletes (6%) had aortic sinus diameter ≥3.4 cm, and another had an ascending aorta of 3.4 cm. There were no other intracardiac or arterial abnormalities. Individual musculoskeletal characteristics of MFS were common among the athletes but not more frequent or numerous in those with aortic dilation. The prevalence of aortic root dilation in this population of athletes was higher than what has previously been reported in other similar populations. Further study is needed to determine whether these represent pathological changes or normal variations in tall athletes. This study adds to the existing knowledge base of athlete's heart, with specific attention to aortic dimensions in elite volleyball players. The data are relevant to similar athletes' medical care and to preparticipation cardiac screening in general.

  11. Morphological classification of novice female volleyball players

    Directory of Open Access Journals (Sweden)

    José António Ribeiro Maia

    2003-12-01

    Full Text Available The characteristics of physique have been the subject of several studies in sport sciences because high-level competitive sports place maximum demands on the physical constitution of players. Furthermore, the specifi c function performed by a player in a game may be related to a particular modality. The goals of this study were: (1 to describe and to compare, from a somatic point of view, the physiques of 71 female volleyball players at beginner levels A and B (aged 12-14 years; and (2 to identify the components of somatic structure that best differentiate the athletics by level of experience. In order to evaluate the players’ somatic structure,we performed 21 measurements including: weight and height, diameters, circumferences, upper and lower limb measurements and skinfolds thicknesses. Discriminant function analysis (DFA was used to identify the power of variables classifi cation. No difference was found in physique between level A and level B players. They were classifi ed by somatotype as mesomorphic endomorphs (A = 4.76 - 3.78 - 1.85; and B = 4.37 - 4.02 - 1.88. RESUMO As características morfológicas têm sido objeto de vários estudos em Ciências Desporto, pelo fato de o fenômeno do desporto de alta competição exigir o máximo da estrutura física dos atletas e pela expectativa da função que o atleta desempenha em jogo. O presente estudo teve como objetivo: (1 descrever e comparar, do ponto de vista somático, a estrutura morfológica de 71 atletas de voleibol do sexo feminino dos escalões de formação A e B (entre os 12 e 14 anos de idade; (2 identifi car os componentes da estrutura somática que melhor diferenciam as atletas de níveis distintos. Para a avaliação da estrutura somática das atletas foram efetuadas 21 avaliações, incluindo além do peso e altura, comprimento dos membros, perímetros, diâmetros e pregas de adiposidade subcutâneas. Com o intuito de verifi car o poder discriminatório das variáveis na

  12. Temporal and Spatial Characteristics of Movement Information Pattern Structure---Based on the Volleyball Serve Movement Scene%运动信息模式结构的时间和空间特征--基于排球发球落点判断的研究

    Institute of Scientific and Technical Information of China (English)

    肖坤鹏

    2015-01-01

    the difference of the structure recognition of the service movement information pattern of the different sports rank volley-ball players is compared, and the time and space features of the structure of the motion information pattern are verified. . To 12 or-dinary university students and 13 state secondary volleyball athletes were tested, through the observation of the athletes serve ac-tion video, respectively, were recorded during normal service action structure, change the behavior index data of action time struc-ture and the change of the action space structure of viewing. Results:in volleyball players change service motion information mod-el of time and structure under the condition of the reaction time and accuracy were significantly lower than those in normal service movement pattern information under the condition of reaction time and accuracy, ordinary college students without significant difference, the volleyball players judge the ball placement task, but with improvement of the sports level of athletes tend to the ve-locity behavior strategies. Conclusion:the time and space features of the movement information pattern structure in the volleyball serve training practice are effectively verified.%对比不同运动等级排球运动员对发球运动信息模式结构识别的差异,验证运动信息模式结构的时间和空间特征。以12名普通大学生和13名国家二级排球运动员为被试,分别记录被试在观看正常发球动作结构、改变动作时间结构和改变动作空间结构条件下的发球动作视频时的行为指标数据。结果:排球运动员在改变发球运动信息模式的时间和空间结构条件下的反应时和准确性显著低于正常发球运动信息模式结构条件下的反应时和准确性,普通大学生无显著差异;但随着运动等级的提高,运动员更偏向于采用速度行为策略。结论:在排球发球运动训练实践过程中运动信息模式结构的时

  13. Factors effecting hamstrings to quadriceps peak torque ratio in volleyball players

    Directory of Open Access Journals (Sweden)

    Ayşegül Yapıcı

    2016-12-01

    Full Text Available The aim of this study was to analyze of hamstring to quadriceps peak torque ratio (H:Q measured in isokinetic testing with respect to different angular velocities (60, 180, 300°/s, gender, dominant side and mode of contraction (concentric, eccentric in volleyball players. Twenty male and ten female healthy volleyball players participated in this study. An independent t-test was used to compare the differences between gender. One-way analysis of variance test was conducted to test for differences by effecting factors. There was a statistically significant difference between dominant and non-dominant side in H:Q ratio at 300°/s in males (p0.05. There was no statistically significant difference between at 60-180-300°/s velocities by Hconc:Qconc contractions and at 60°/s by Hconc:Qecc contractions for male and female’s peak torques in dominant side (p>0.05. There was a statistically significant difference between at 60°/s by Hconc:Qconc and Hconc:Qecc contractions for male and female’s peak torques in dominant side (p0.05. It was found in our study that H:Q ratio increases with increasing angular velocity. The findings of the present study indicated that angular velocity, type of contraction and leg dominance influence isokinetic strength profiles of male and female, consequently, muscular balance that is H:Q at the knee. This implies that isokinetic concentric knee strength plays more role in high intensity contractions and has more effect at high velocities of contraction in maximal performance.

  14. Collaboration with Sport Psychologists as Viewed by Female Volleyball Junior Teams

    Science.gov (United States)

    Otrebski, Wojciech; Rutkowska, Katarzyna

    2008-01-01

    Study aim: To determine the need of female junior volleyball players to collaborate with a psychologist, considering previous sport career of those players. Material and methods: A group of 78 female volleyball players aged 14-17 years from 7 top Polish junior teams participated in the study. They were requested to fill questionnaires on their…

  15. Students' Game Performance Improvements during a Hybrid Sport Education-Step-Game-Approach Volleyball Unit

    Science.gov (United States)

    Araújo, Rui; Mesquita, Isabel; Hastie, Peter; Pereira, Cristiana

    2016-01-01

    The purpose of this study was to examine a hybrid combination of sport education and the step-game-approach (SGA) on students' gameplay performance in volleyball, taking into account their sex and skill-level. Seventeen seventh-grade students (seven girls, 10 boys, average age 11.8) participated in a 25-lesson volleyball season, in which the…

  16. Students' Game Performance Improvements during a Hybrid Sport Education-Step-Game-Approach Volleyball Unit

    Science.gov (United States)

    Araújo, Rui; Mesquita, Isabel; Hastie, Peter; Pereira, Cristiana

    2016-01-01

    The purpose of this study was to examine a hybrid combination of sport education and the step-game-approach (SGA) on students' gameplay performance in volleyball, taking into account their sex and skill-level. Seventeen seventh-grade students (seven girls, 10 boys, average age 11.8) participated in a 25-lesson volleyball season, in which the…

  17. Collaboration with Sport Psychologists as Viewed by Female Volleyball Junior Teams

    Science.gov (United States)

    Otrebski, Wojciech; Rutkowska, Katarzyna

    2008-01-01

    Study aim: To determine the need of female junior volleyball players to collaborate with a psychologist, considering previous sport career of those players. Material and methods: A group of 78 female volleyball players aged 14-17 years from 7 top Polish junior teams participated in the study. They were requested to fill questionnaires on their…

  18. Volley-ball in the soviet megaculture of 30-50th of ХХ century

    Directory of Open Access Journals (Sweden)

    Yermakov S.S.

    2010-04-01

    Full Text Available The period of mass distribution of physical culture and forming man-sportsman is considered. A role and value of volley-ball is shown in life of millions people. Positions of volley-ball are presented in making healthy society and increase of his standard of culture. Mentioned facts mass infatuation for volley-ball. Positions of the state in regard to support of mass character of volley-ball are distinguished as a folk game. High authority of volley-ball and his value is marked in physical development of the young generations.

  19. Previously identified patellar tendinopathy risk factors differ between elite and sub-elite volleyball players.

    Science.gov (United States)

    Janssen, I; Steele, J R; Munro, B J; Brown, N A T

    2015-06-01

    Patellar tendinopathy is the most common knee injury incurred in volleyball, with its prevalence in elite athletes more than three times that of their sub-elite counterparts. The purpose of this study was to determine whether patellar tendinopathy risk factors differed between elite and sub-elite male volleyball players. Nine elite and nine sub-elite male volleyball players performed a lateral stop-jump block movement. Maximum vertical jump, training history, muscle extensibility and strength, three-dimensional landing kinematics (250 Hz), along with lower limb neuromuscular activation patterns (1500 Hz), and patellar tendon loading were collected during each trial. Multivariate analyses of variance (P volleyball players. Interventions designed to reduce landing frequency and improve quadriceps extensibility are recommended to reduce patellar tendinopathy prevalence in volleyball players. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  20. Vortex-induced dynamic loads on a non-spinning volleyball

    Science.gov (United States)

    Qing-ding, Wei; Rong-sheng, Lin; Zhi-jie, Liu

    1988-09-01

    An experiment on vortex-induced dynamic loads on a non-spinning Volleyball was conducted in a wind tunnel. The flow past the Volleyball was visualized, and the aerodynamic load was measured by use of a strain gauge balance. The separation on the Volleyball was measured with hot-film. The experimental results suggest that under the action of an unstable tail vortex system the separation region is changeable, and that the fluctuation of drag and lateral forces is the same order of magnitude as the mean drag, no matter whether the seam of the Volleyball is symmetric or asymmetric, with regard to the flow. Based on the experimental data a numerical simulation of Volleyball swerve motion was made.

  1. In-service helium leak testing of vacuum furnace

    Science.gov (United States)

    Ahmad, Anis; Tripathi, S. K.; Sawant, P. S.; Mukharjee, D.; Shah, B. K.

    2012-11-01

    Helium leak detection of vacuum furnaces and equipments used for processing of nuclear material is generally carried out by utilizing vacuum spray technique. In this technique helium leak detector is connected to the furnace, back ground reading is noted and helium gas is sprayed on all the suspected joints. Any increase in back ground is noted as leak signal. Processing of Zirconium alloy cladded fuel pins is carried out in vacuum furnace of about 3 meter length and 500 mm inside diameter. Furnace is connected with two numbers of rotary vacuum pump and one number of diffusion pump for creating vacuum (1 × 10-6 torr) inside the furnace. It is desirable that furnace should have good vacuum and best possible leak tightness during dynamic and static vacuum. During dynamic vacuum at higher temperature although required vacuum is achieved the furnace may have fine leakage through which air may enter and cause oxidation of clad tube leading to change in its coloration. This change in coloration will cause rejection of fuel element. Such fine leakages may not be reflected in the dynamic vacuum of the system at high temperature. During trial run change in coloration of outside surface of clad tube was observed although dynamic vacuum of the furnace was in the range of 1×10-6 torr range. To eliminate such possibilities of oxidation due to fine leakages in the system, it was decided to carry out in-service leak testing of the furnace. Helium leak testing of the furnace was carried out by using vacuum spray method and leaks observed were repaired and furnace was retested to ensure the leak tightness. The in-service helium leak testing of the furnace helped in maintaining its leak tightness during service under dynamic vacuum and prevent oxidation of fuel element. This paper describes the techniques of in- service helium leak testing, it's importance for detection of fine leak under dynamic vacuum and discusses details of the testing method and result obtained.

  2. Effects of contextual interference on acquisition and retention of three volleyball skills.

    Science.gov (United States)

    Jones, Laura L; French, Karen E

    2007-12-01

    Manipulating the organization of practice conditions, through contextual interference, was identified as a method to promote motor skill acquisition by Brady in 1998. The generalizability of this learning effect is questionable and the amount of repetition versus the amount of change in task presentation requires investigation. The purpose of this study was to explore explanations for the performance of learners practicing the AAHPERD volleyball skills test when the change in task presentation varied. High school students were randomly assigned to blocked, random, and random-blocked practice groups. While all groups significantly improved all skills during acquisition, there was no support for the contextual interference effect. Potential explanations might be dependent upon the learners' skill and the complexity of the task to be learned. Further research is warranted examining contextual interference effect on practice organization at levels of difficulty appropriate to facilitate cognitive processing of task-related information.

  3. 77 FR 4203 - Energy Conservation Program: Test Procedures for General Service Fluorescent Lamps, General...

    Science.gov (United States)

    2012-01-27

    ... Fluorescent Lamps, General Service Incandescent Lamps, and Incandescent Reflector Lamps AGENCY: Office of... the test procedures for general service fluorescent lamps (GSFLs), general service incandescent lamps (GSILs), and incandescent reflector lamps (IRLs). That proposed rulemaking serves as the basis for...

  4. Preferred HIV testing services and programme characteristics among clients of a rapid HIV testing programme

    Science.gov (United States)

    2013-01-01

    Background In the current context of diversity and coexistence of HIV testing approaches, limited information exists on test recipient’s views of HIV testing services and programme attributes that could ease the testing process and make it more appealing for at risk individuals who don’t know their HIV status. This study analyzed ratings given to different testing sites and programme characteristics that might facilitate testing. Methods We analyzed data from 3120 persons attending a mobile HIV testing programme located on a central street in the gay district of Madrid. Results 64% were men (of which, 55% had had sex with other men), 59.5% were <30 years, 35.4% foreigners, 50.6% had a university degree,71.7% a regular employment, 59.3% reported multiple partners and inconsistent condom use and 56.5% had been tested for HIV. Non Governmental Organizations and specific HIV/STI centres received the maximum rating from over 60% of participants, followed by self-testing (38.9%). Pharmacies (20.8%) and hospital emergency departments (14.2%) were the worst valued testing sites. Over 80% gave the highest rating to having immediate test results, not needing a previous appointment, and free testing, while less than 50% gave the maximum rating to privacy and anonymity. Conclusions HIV testing services that don’t require an appointment, based on free tests with rapid results are most valued by a young, not socially marginalized but high risk sexual exposure population. On the contrary, issues traditionally highly valued by health care providers or AIDS social organizations (privacy and anonymity) are much less valued. PMID:23987230

  5. Implementation Method of Non-Intrusive Monitoring Mechanism for Web Services Testing

    Institute of Scientific and Technical Information of China (English)

    Lun Cai; Jing-Ling Liu; Xi Wang

    2009-01-01

    In web services testing, accessing the interactive contents of measured services and the information of service condition accurately are the key issues of system design and realization. A non-intrusive solution based on axis2 is presented to overcome the difficulty of the information retrieval in web service testing. It can be plugged in server side or client side freely to test pre-deployed or deployed web services. Moreover, it provides a monitoring interface and the corresponding subscription publication mechanism for users based on web services to support the quality assurance grounded on service-oriented architecture (SOA) application service.

  6. FORMATIVE ADAPTIVE TESTING SERVICE WEB TO INDIVIDUALIZE ELEARNING PROCESS

    Directory of Open Access Journals (Sweden)

    NOUR-EDDINE El FADDOULI

    2011-06-01

    Full Text Available In most of the existing E-learning systems, the content and the order of activities are presented in a static manner without taking into consideration the learner’s characteristics. Therefore, customizing and adapting the environment to the learner’s profile has shown important improvement in education quality. There are several adaptation approaches of E-learning environments, such as, adaptive hypermedia system, semantic web, etc. In our proposed system (RIMEV, we adopted a Competency Based Approach (CBA, and we found that a welladapted system depends mainly on the adequacy of the information collected through a personal diagnostic. This diagnostic takes place via an adaptive test using the Item Response Theory (IRT in a formative approach. This Intelligent test administers optimal items in an appropriate order in a short time and produces a goodassessment of the learner’s skills with accurate results. Thus the e-learning systems can lead the learner to gradually acquire a skill by taking into account his/her characteristics and predispositions.Concerning the technological aspect, the system is implemented as a composed web service, which calls several basic services that coordinate according to an orchestration plan. This allows interoperability with heterogeneous learning systems.

  7. Attack Coverage in High-Level Men’s Volleyball: Organization on the Edge of Chaos?

    Directory of Open Access Journals (Sweden)

    Laporta Lorenzo

    2015-09-01

    Full Text Available Change is pervasive, but emerging patterns are occasionally detectable through analysis of systemic behaviors. Match analysis uses these patterns in order to reduce the degree of improvisation and to optimize the training process. However, it is possible that certain game phases elude systematic patterning. In this vein, our aim was to analyze the case of attack coverage in men’s volleyball, as we suspected it would elude systematic patterning and has received negligible attention in scientific research. We analyzed the occurrence of attack coverage in 4544 plays of the 2011 Volleyball World League. A Chi-square test with residual adjusted values was applied to explore significant associations between variables. A Monte Carlo correction was applied, as some cells had n<5. Effect sizes were determined using Cramer’s V. Overall, attack coverage occurred in 3.89% of ball possessions, and 23 distinct structures emerged. These structures lacked significant associations with the game complex, setting zone, and effect of attack coverage. Conversely, attack coverage structures showed significant associations with the attack zone and tempo, with very strong effect sizes (V=0.472 and V=0.521, respectively. As certain attack zones are deeply associated with attack tempo, it is apparent that quicker attack plays affect attack coverage structuring, promoting the formation of less complex structures. Ultimately, attack coverage structures seem to depend on momentary constraints, thereby rendering rigid systematization impracticable. Still, we contended that a principle-based approach might be suitable. This invites researchers to rethink how to interpret game regularities.

  8. Generalized Joint Laxity and Ligament Injuries in High School–Aged Female Volleyball Players in Japan

    Science.gov (United States)

    Sueyoshi, Ted; Emoto, Gen; Yuasa, Tomoki

    2016-01-01

    Background: Generalized joint laxity has been linked to ligamentous injuries such as anterior cruciate ligament tear and ankle sprain. Purpose/Hypothesis: The purpose of this study was to investigate generalized joint laxity and incidence of ligament injuries in high school–aged female volleyball players. It was hypothesized that volleyball players with a past history of sprains would have increased generalized joint laxity compared with those without any history and that athletes with multiple sprains would demonstrate with a higher generalized joint laxity score than those who had only 1 sprain. Study Design: Case-control study; Level of evidence, 3. Methods: Forty-seven subjects were tested for generalized joint laxity using the Beighton and Horan Joint Mobility Index (BHJMI). They were categorized into 2 groups based on the presence of past ligament injury: injury group (IG) and noninjury group (NG). The IG group was further divided into 2 groups based on whether they had a single ligamentous injury (IGS) or multiple injuries (IGM) in the past to study whether there was any difference in scores between the subgroups. The collected data were analyzed statistically with 1-way analysis of variance. Results: Subjects in the IG group scored significantly higher on the BHJMI than those in the NG group. The mean score for the IG group was 2.40 ± 1.42, as opposed to 1.24 ± 1.09 for the NG group (P = .006). Eleven subjects in the IG group had suffered multiple injuries or recurrent injuries (IGM) and scored significantly higher than the remaining 19 individuals in the IG group, who had only sustained a single injury (IGS). The mean BHJMI scores were 3.18 ± 1.47 and 1.95 ± 1.22 for IGM and IGS, respectively (P = .02). Conclusion: Female athletes with a high generalized joint laxity score may be more prone to ligament injury and potentially to recurrent ligament injuries. PMID:27761474

  9. Overview of the Acoustic Testing of the European Service Module Structural Test Article (E-STA)

    Science.gov (United States)

    Hughes, William; Fogt, Vince; Le Plenier, Cyprien; Duval, Francois; Durand, Jean-Francois; Staab, Lucas D.; Hozman, Aron; Mcnelis, Anne; Bittinger, Samantha; Thirkettle, Anthony; hide

    2017-01-01

    The European Space Agency (ESA) and their prime contractor Airbus Defense Space (ADS) are developing the European Service Module (ESM) for integration and utilization with other modules of NASAs Orion Multi-Purpose Crew Vehicle. As part of this development, ESA, ADS, NASA and the Lockheed Martin Company performed a series of reverberant acoustic tests in April-May 2016 on the ESM Structural Test Article (E-STA), the mechanical mock-up of the ESM designated for mechanical tests. Testing the E-STA under acoustic qualification loads verifies whether it can successfully withstand the medium and high frequency mechanical environment occurring during the vehicles lift-off and atmospheric phases of flight. The testing occurred at the Reverberant Acoustic Test Facility (RATF) at the NASA Glenn Research Centers Plum Brook Station site in Sandusky, OH, USA. This highly successful acoustic test campaign excited the E-STA to acoustic test levels as high as 149.4 dB Overall Sound Pressure Level. This acoustic testing met all the ESA and ADSs test objectives, including establishingverifying the random vibration qualification test levels for numerous hardware components of the ESM, and qualifying the ESMs Solar Array Wing electrical power system. This paper will address the test objectives, the test articles configuration, the test instrumentation and excitation levels, the RATF site and capabilities, the series of acoustic tests performed, and the technical issues faced and overcome to result in a successful acoustic test campaign for the ESM. A discussion of several test results is also included.

  10. Comparison of posture among adolescent male volleyball players and non-athletes

    Science.gov (United States)

    2014-01-01

    Due to high training loads and frequently repeated unilateral exercises, several types of sports training can have an impact on the process of posture development in young athletes. The objective of the study was to assess and compare the postures of adolescent male volleyball players and their non-training peers. The study group comprised 104 volleyball players while the control group consisted of 114 non-training individuals aged 14-16 years. Body posture was assessed by the Moiré method. The volleyball players were significantly taller, and had greater body weight and fat-free mass. The analysis of posture relative to symmetry in the frontal and transverse planes did not show any significant differences between the volleyball players and non-athletes. Postural asymmetries were observed in both the volleyball players and the control participants. Lumbar lordosis was significantly less defined in the volleyball players compared to non-training individuals while no difference was observed in thoracic kyphosis. All athletes demonstrated a loss of lumbar lordosis and an increase in thoracic kyphosis. Significant differences in anteroposterior curvature of the spine between the volleyball players and the non-athletes might be associated with both training and body height. Considering the asymmetric spine overloads which frequently occur in sports training, meticulous posture assessment in young athletes seems well justified. PMID:25729154

  11. Incidence, aetiology and prevention of musculoskeletal injuries in volleyball: A systematic review of the literature.

    Science.gov (United States)

    Kilic, O; Maas, M; Verhagen, E; Zwerver, J; Gouttebarge, V

    2017-07-01

    Currently, there is no overview of the incidence and (volleyball-specific) risk factors of musculoskeletal injuries among volleyball players, nor any insight into the effect of preventive measures on the incidence of injuries in volleyball. This study aimed to review systematically the scientific evidence on the incidence, prevalence, aetiology and preventive measures of volleyball injuries. To this end, a highly sensitive search strategy was built based on two groups of keywords (and their synonyms). Two electronic databases were searched, namely Medline (biomedical literature) via Pubmed, and SPORTDiscus (sports and sports medicine literature) via EBSCOhost. The results showed that ankle, knee and shoulder injuries are the most common injuries sustained while playing volleyball. Results are presented separately for acute and overuse injuries, as well as for contact and non-contact injuries. Measures to prevent musculoskeletal injuries, anterior knee injuries and ankle injuries were identified in the scientific literature. These preventive measures were found to have a significant effect on decreasing the occurrence of volleyball injuries (for instance on ankle injuries with a reduction from 0.9 to 0.5 injuries per 1000 player hours). Our systematic review showed that musculoskeletal injuries are common among volleyball players, while effective preventive measures remain scarce. Further epidemiological studies should focus on other specific injuries besides knee and ankle injuries, and should also report their prevalence and not only the incidence. Additionally, high-quality studies on the aetiology and prevention of shoulder injuries are lacking and should be a focus of future studies.

  12. Shoulder rotators electro-mechanical properties change with intensive volleyball practice: a pilot study.

    Science.gov (United States)

    Cornu, C; Nordez, A; Bideau, B

    2009-12-01

    This pilot study was designed to assess the incidence of high-level volleyball practice on muscle strength production and muscle activation during internal and external shoulder rotations. Seven professional and seven French amateur league volleyball players performed maximal isometric at three forearm angles, concentric and eccentric isokinetic internal and external shoulder rotations. The torque production and muscle activation levels of PECTORALIS MAJOR and INFRASPINATUS were determined. Few significant differences were found for muscle activation and co-activation between amateur and professional volleyball players during both internal and external rotations. No significant difference in torque production was observed for shoulder internal rotation between professional and amateur volleyball players. Torque production was significantly higher during shoulder external rotation for amateur (46.58+/-2.62 N . m) compared to professional (35.35+/-1.17 N . m) volleyball players relative to isometric contractions, but it was not different during isokinetic efforts. The torque ratios for external/internal rotations were always significantly lower for professional (0.42+/-0.03 pooling isometric and concentric conditions) compared to amateur volleyball players (0.56+/-0.03 pooling isometric and concentric conditions). Those results emphasize that a high level of volleyball practice induces a strong external rotators deficit compared to sports such as swimming, baseball or tennis.

  13. Comparison of posture among adolescent male volleyball players and non-athlete

    Directory of Open Access Journals (Sweden)

    Małgorzata Grabara

    2014-10-01

    Full Text Available Due to high training loads and frequently repeated unilateral exercises, several types of sports training can have an impact on the process of posture development in young athletes. The objective of the study was to assess and compare the postures of adolescent male volleyball players and their non-training peers. The study group comprised 104 volleyball players while the control group consisted of 114 non-training individuals aged 14-16 years. Body posture was assessed by the Moiré method. The volleyball players were significantly taller, and had greater body weight and fat-free mass. The analysis of posture relative to symmetry in the frontal and transverse planes did not show any significant differences between the volleyball players and non-athletes. Postural asymmetries were observed in both the volleyball players and the control participants. Lumbar lordosis was significantly less defined in the volleyball players compared to non-training individuals while no difference was observed in thoracic kyphosis. All athletes demonstrated a loss of lumbar lordosis and an increase in thoracic kyphosis. Significant differences in anteroposterior curvature of the spine between the volleyball players and the non-athletes might be associated with both training and body height. Considering the asymmetric spine overloads which frequently occur in sports training, meticulous posture assessment in young athletes seems well justified.

  14. Comparison of posture among adolescent male volleyball players and non-athletes

    Directory of Open Access Journals (Sweden)

    Małgorzata Grabara

    2014-11-01

    Full Text Available Due to high training loads and frequently repeated unilateral exercises, several types of sports training can have an impact on the process of posture development in young athletes. The objective of the study was to assess and compare the postures of adolescent male volleyball players and their non-training peers. The study group comprised 104 volleyball players while the control group consisted of 114 non-training individuals aged 14-16 years. Body posture was assessed by the Moiré method. The volleyball players were significantly taller, and had greater body weight and fat-free mass. The analysis of posture relative to symmetry in the frontal and transverse planes did not show any significant differences between the volleyball players and non-athletes. Postural asymmetries were observed in both the volleyball players and the control participants. Lumbar lordosis was significantly less defined in the volleyball players compared to non-training individuals while no difference was observed in thoracic kyphosis. All athletes demonstrated a loss of lumbar lordosis and an increase in thoracic kyphosis. Significant differences in anteroposterior curvature of the spine between the volleyball players and the non-athletes might be associated with both training and body height. Considering the asymmetric spine overloads which frequently occur in sports training, meticulous posture assessment in young athletes seems well justified.

  15. Iron supplementation prevents a decline in iron stores and enhances strength performance in elite female volleyball players during the competitive season.

    Science.gov (United States)

    Mielgo-Ayuso, Juan; Zourdos, Michael C; Calleja-González, Julio; Urdampilleta, Aritz; Ostojic, Sergej

    2015-06-01

    The primary aim of this study was to examine the effects of 11 weeks of iron supplementation on hematological and strength markers in elite female volleyball players. Twenty-two volleyball players (aged 27.0 ± 5.6 years) from 2 Spanish First National League teams participated and were counterbalanced into 1 of 2 groups based upon iron status: (i) control group (CG, n = 11); or (ii) iron treatment group (ITG, n = 11), which received 325 mg/day of ferrous sulphate daily. Subjects performed their team's regimen of training or match play every day. Both groups were tested for hematological and strength levels at 2 points: (i) baseline (T0, before preseason) and (ii) 11 weeks later (T11, post-testing). Hematological parameters were serum iron (sFe), serum ferritin (FER), transferrin saturation index (TSI), and hemoglobin (Hb); strength assessments were bench press, military press, half-squat, power clean, clean and jerk, and pull-over. CG experienced a significant decrease (p 0.05). Consequently, in ITG all hematological parameters were significantly greater (p volleyball players during the competitive season.

  16. Psycho-physical perfection of economic specialties’ girl students under influence of sport-oriented technology, based on prevalence of volleyball practicing

    Directory of Open Access Journals (Sweden)

    Salatenko I.O.

    2015-12-01

    Full Text Available Purpose: to work out content of sport-oriented technology of physical education, based on prevalence of volleyball practicing. Material: in the research two experimental (n=25, n=25 and one control (n=25 groups of girl students participated. The content of sport-oriented technology, based on prevalence of volleyball practicing included additionally elements of fitness. студенток. Quickness of mental processes and efficiency of mind operations were assessed with the help of special cards, on which 9 dials with pointers were depicted. The sense of test was: addition of dials’ readings in mind; simultaneous calculation of value of scale one division; keeping in memory the previous sum of readings. This task was to be fulfilled for 6 minutes. Results: it was found that quickness of mental processes and mind operations as well as operative memory were at level below average. The most expressed positive factor was registered in group in which circle sport trainings were conducted. It was also found that over-fatigue at the end of academic year influences on testing indicators. Conclusions: the offered by us sport-oriented technology, based on prevalence of volleyball practicing can be recommended as effective mean of economic specialties girl students’ psycho-physical qualities’ strengthening.

  17. [Self-testing using by OTC test kits and mail testing services--it's future prospect and problems].

    Science.gov (United States)

    Ito, Kiichi

    2004-06-01

    Under the certification of the Ministry of Health, Labor and Welfare, OTC medicine (Over the counter medicine: medicine for general tests) such as test strips for urine protein and urine glucose as well as urinary pregnancy tests are presently available at pharmacies and drug stores for use as self-testing by ordinary people. Meanwhile, mail health check-up testing services have recently been making a rapid progress in the market. In this system, users purchase "sample collecting kits" at large-scale pharmacies, directly or indirectly, and then after collecting samples (urine, blood, etc) by themselves, they put the samples onto the mail testing service process consisting of the linkage of convenience stores--couriers--testing agencies affiliated with clinical facilities. The samples are tested in the testing agencies and the results of the testing are returned to individual user. This innovative system allows users to control and manage their own health conditions. Future prospects and problems over the system will be discussed here.

  18. Superolateral Hoffa's Fat Pad Edema in Collegiate Volleyball Players.

    Science.gov (United States)

    Mehta, Kaushal; Wissman, Robert; England, Eric; Dʼheurle, Albert; Newton, Keith; Kenter, Keith

    2015-01-01

    Superolateral Hoffa's fat pad (SHFP) edema is a previously described magnetic resonance (MR) finding located between the patellar tendon and the lateral femoral condyle. The purpose of our study was to determine the prevalence and clinical significance of SHFP edema in female collegiate volleyball players. Sixteen female collegiate volleyball players were consented for bilateral knee evaluations which consisted of history, physical examination and MR imaging. Each MR study was reviewed for the presence of SHFP edema, and 6 patellar maltracking measurements were done. These were tibial tuberosity-trochlear groove distance, patellar translation, lateral patellofemoral angle, trochlear depth, trochlear sulcus angle, and lateral trochlear inclination angle. A total of 16 athletes, 32 knees (16 girls; age range, 18-22 years; mean, 19.9) were enrolled in the study. Sixteen knees (50%) in 8 athletes had SHFP edema, with 100% bilaterality; 16 knees in 8 athletes had no evidence of SHFP edema (50%). Functional outcomes and physical examination findings were within normal limits for all athletes with no difference noted between SHFP edema-positive and -negative individuals. There was a statistically significant difference in the tibial tuberosity-trochlear groove distance, patellar translation, and patellofemoral angle (P value of volleyball athletes have a very high prevalence of SHFP edema, which is always bilateral. Although the exact etiology of SHFP edema remains inconclusive, it could potentially be a sensitive indicator of subtle patellar maltracking which cannot be distinguished by history and physical examination findings. Given the very high prevalence of SHFP edema and this being an asymptomatic finding, there is likely little clinical significance of this in majority of high-performance athletes.

  19. High Prevalence of Nontraumatic Shoulder Pain in a Regional Sample of Female High School Volleyball Athletes

    Science.gov (United States)

    Frisch, Kayt E.; Clark, Jacob; Hanson, Chad; Fagerness, Chris; Conway, Adam; Hoogendoorn, Lindsay

    2017-01-01

    Background: Shoulder pain is becoming increasingly problematic in young players as volleyball gains popularity. Associations between repetitive motion and pain and overuse injury have been observed in other overhand sports (most notably baseball). Studies of adult athletes suggest that there is a shoulder pain and overuse problem present in volleyball players, but minimal research has been done to establish rates and causes in juvenile participants. Purpose: To establish rates of shoulder pain, regardless of whether it resulted in a loss of playing time, in female high school volleyball players. A secondary goal was to determine whether high repetition volumes correlated with an increased likelihood of experiencing pain. Study Design: Descriptive epidemiology study. Methods: A self-report survey focusing on the prevalence of pain not associated with a traumatic event in female high school youth volleyball players was developed. Survey questions were formulated by certified athletic trainers, experienced volleyball coaches, and biomechanics experts. Surveys were received from 175 healthy, active high school volleyball players in Iowa, South Dakota, and Minnesota. Results: Forty percent (70/175) of active high school volleyball players remembered experiencing shoulder pain not related to traumatic injury, but only 33% (23/70) reported taking time off to recover from the pain. Based on these self-reported data, activities associated with significantly increased risk of nontraumatic shoulder pain included number of years playing competitive volleyball (P = .01) and lifting weights out of season (P = .001). Players who reported multiple risk factors were more likely to experience nontraumatic shoulder pain. Conclusion: When using time off for recovery as the primary injury criterion, we found that the incidence of shoulder pain is more than twice as high as the incidence of injury reported by previous studies. Findings also indicated that the incidence of shoulder pain

  20. Self-reported symptoms and risk factors for digital ischaemia among international world-class beach volleyball players.

    Science.gov (United States)

    Van De Pol, Daan; Alaeikhanehshir, Sena; Maas, Mario; Kuijer, P Paul F M

    2016-01-01

    The prevalence of ischaemia-related symptoms is remarkably high among elite indoor volleyball players. Since the exposure to sport-specific demands may be higher in beach volleyball compared to indoor volleyball, the aim of this study was to assess the prevalence of ischaemia-related symptoms and associated risk factors among world-class beach volleyball players. Therefore, a questionnaire survey was performed among beach volleyball players active during the 2013 Grand Slam Beach Volleyball in the Netherlands. In total, 60 of the 128 beach volleyball players (47%) participated: 26 males and 34 females from 17 countries. The self-reported prevalence of cold or blue or pale digits in the dominant hand during or immediately after practice or competition was 38% (n = 23). Two risk factors were independently associated with symptoms of blue or pale digits: more than 14 years playing volleyball (odds ratio (OR) 4.42, 90% confidence interval (90% CI) 1.30-15.07) and sex (female) (OR 4.62, 90% CI 1.15-18.57). In conclusion, the prevalence of symptoms associated with digital ischaemia is high among international world-class beach volleyball players. Female sex and the length of the volleyball career were independently associated with an increased risk of ischaemia-related symptoms. The high prevalence of these seemingly innocuous symptoms and possible associated risk factors warrant regular monitoring since early detection can potentially prevent thromboembolic complications and irreversible tissue damage.

  1. Structural and electronic stability of a volleyball-shaped B80 fullerene

    Science.gov (United States)

    Wang, Xiao-Qian

    2010-10-01

    We have studied the structural and electronic characteristics of a volleyball-shaped B80 cage using first-principles density-functional calculations. In contrast to the popularly ratified “magic” B80 buckyball with 20 hexagonal pyramids and 12 hollow pentagons, the volleyball-shaped B80 constitutes 12 pentagonal pyramids, 8 hexagonal pyramids, and 12 hollow hexagons. The B80 volleyball is markedly more stable than the previously assumed magic B80 buckyball, which is attributed to the improved aromaticity associated with the distinct configuration.

  2. Strength of the Shoulder Rotators in Second-League Volleyball Players

    Directory of Open Access Journals (Sweden)

    Popieluch Aneta

    2015-12-01

    Full Text Available Introduction. The main aim of the study was to assess the strength of the shoulder rotator muscles of a group of second-league volleyball players. These muscles are assumed to have a crucial impact on attack effectiveness in volleyball. Strength was assessed based on peak torque values obtained for the rotator muscles measured using the maximal voluntary contraction (MVC method. Torque was measured in both limbs and the differences between the two limbs were examined. The torque values obtained for the volleyball players were also compared against those measured in a group of students who had never trained any sports.

  3. Sleep Quality, Mood and Performance: A Study of Elite Brazilian Volleyball Athletes

    Science.gov (United States)

    Andrade, Alexandro; Bevilacqua, Guilherme G.; Coimbra, Danilo R.; Pereira, Fabiano S.; Brandt, Ricardo

    2016-01-01

    This investigation analyzed the relationships between sleep quality, mood, and game results in the elite athletes participating in Brazilian volleyball competitions. Participants (n = 277 elite Brazilian volleyball athletes, 214 (77.3%) men and 63 (22.7%) women) completed the Brunel Mood Scale (BRUMS) and reported their subjective sleep perception. Athletes with poor sleep quality reported higher scores for confusion compared to athletes with good sleep quality (p volleyball athletes. Our results indicated that for every pointwise increase in the level of confusion, there was an associated 19.7% reduction in sleep quality Athletes who slept well, and won their games, had lower tension levels. PMID:27928205

  4. ATM Quality of Service Tests for Digitized Video Using ATM Over Satellite: Laboratory Tests

    Science.gov (United States)

    Ivancic, William D.; Brooks, David E.; Frantz, Brian D.

    1997-01-01

    A digitized video application was used to help determine minimum quality of service parameters for asynchronous transfer mode (ATM) over satellite. For these tests, binomially distributed and other errors were digitally inserted in an intermediate frequency link via a satellite modem and a commercial gaussian noise generator. In this paper, the relation- ship between the ATM cell error and cell loss parameter specifications is discussed with regard to this application. In addition, the video-encoding algorithms, test configurations, and results are presented in detail.

  5. The Impact of Imagery on Self-efficacy and Volleyball Spike Performance: Mediating Role of Positive Self-talk

    Directory of Open Access Journals (Sweden)

    Soheila Majlesi Ardehjani

    2013-12-01

    Full Text Available The aim of this study is to determine the impact of imagery on self-efficiency and spike implementation of girl volleyball players in Tafresh, considering the mediating role of positive self-talk. For this purpose, in a non-equivalent pretest-posttest control group design, 45 female football players aged 17-25 with sports record of 6 months to 2 years were selected out of high schools and universities in Tafresh. They were distributed in 3 groups on the basis of spike skill level, imagery ability and the level of Self-efficiency. The first group imagery and physical practices program, the second group imagery and positive self-talk and physical practices and the third group without any programs took part in an experimental course three days a week for 12 sessions. For data collection, sports imagery questionnaire (Hall et al., 1998, feeling of sufficiency scale (Bandura, 1994 and volleyball spike standardized test (AAHPERD were used. Data analysis was done at a meaningful level of 0.05 through variance analysis with repeated measurements and Tukey posthoc (HSD test. The results of the research showed that imagery along with physical practice leads to spike improvement and self-efficiency but if imagery is associated with positive self-talk, effectiveness rate of imagery will be increased.

  6. STRESS TESTS FOR VIDEOSTREAMING SERVICES BASED ON RTSP PROTOCOL

    Directory of Open Access Journals (Sweden)

    Gabriel Elías Chanchí Golondrino

    2015-11-01

    Full Text Available Video-streaming is a technology with major implications these days in such diverse contexts as education, health and the business sector; all of this regarding the ease it provides for remote access to live or recorded media content, allowing communication regardless of geographic location. One standard protocol that enables implementation of this technology is real time streaming protocol, or RTSP. However, since most application servers and Internet services are supported on HTTP requests, very little research has been done on generating tools for carrying out stress tests on streaming servers. This paper presents a stress measuring tool called Hermes, developed in Python, which allows calculation of response times for establishing RTSP connections to streaming servers, as well as obtaining RAM memory consumption and CPU usage rate data from these servers. Hermes was deployed in a video-streaming environment where stress testing was carried out on the LIVE555 server, using calls in the background to VLC and OpenRTSP open source clients. 

  7. ANÁLISIS DE LAS VARIABLES ANTROPOMÉTRICAS Y FÍSICO TÉCNICAS EN VOLEIBOL FEMENINO [Analysis of anthropometric and physical techniques in women´s volleyball

    Directory of Open Access Journals (Sweden)

    Natalia Valladares Iglesias

    2016-12-01

    Volleyball has been considered a highly complex sport because of their technical, tactical, physical, psychological and anthropometric factors requirements. Over the years there has been an increase in the homogeneity of the characteristics of volleyball players in high performance due to talent acquisition with similar skills. The main interest of this study was to determine the performance of a sample of 53 volleyball players participating in different official women's volleyball competition. The variables studied are: category, anthropometric variables (body mass, height, endomorphy, mesomorphy, ectomorphy, upper body strength (throwing ball, measure the speed hitting without jump and with jump spike and lower body strength (CMJ, ABK, DJ and jump spike. Statistical analysis consisted of a Shapiro-Wilks test, to determine the normality of the sample. The comparative analysis between categories was performed using an analysis of variance (ANOVA a factor. The results showed a significant positive increase in physical, technical and anthropometric characteristics of the players with the increased level of competition, and a better use of technical gestures, reflecting an increase in performance thereof.

  8. Somatotype and anthropometry in brazilian national volleyball teams

    Directory of Open Access Journals (Sweden)

    B.G. Cabral

    2008-01-01

    Full Text Available The elaboration of profile characteristics that can serve as parameters in the different categories and investment in scientific studies of Brazilian volleyball have shown their importance in developing new athletes. In this sense, the objective of the descriptive study in question was to analyze important characteristics such as somatotype and anthropometry in the Brazilian under-17 and under-18 national teams, respectively. The population was composed of 33 (14 females and 19 males athletes from the aforementioned teams. We used a high-precision scale and stadiometer to verify anthropometric characteristics and Heath & Carter’s method to evaluate somatotype. The men’s team obtained the following mean results: Age = 16.71; height = 195.9cm; body weight = 87.7kg; endomorphy = 1.26; mesomorphy = 3.18 and ectomorphy = 3.8; while the women’s results were: Age = 15.9; height = 181.6cm; body weight = 67.4kg; endomorphy = 3.09; mesomorphy = 2.21 and ectomorphy = 3.88. We can conclude from the results that the teams in question have similar characteristics to those of the high-performance adult teams, and exhibit a predominance of the ectomorphic component of the somatotype. This finding is of great importance, given the current demands of high-performance volleyball, and shows us the high level of the group studied.

  9. Overload and neovascularization of shoulder tendons in volleyball players

    Directory of Open Access Journals (Sweden)

    Notarnicola Angela

    2012-08-01

    Full Text Available Abstract Background In overhead sports like volleyball, the onset of a rotator cuff tendinopathy due to functional overload is a common observation. An angiofibroblastic etiopathogenesis has been hypothesized, whereby a greater anaerobic metabolism occurs in critical zones of the tendon with a lower degree of vascularization; this would induce collagen and extracellular matrix degradation, that could then trigger a compensatory neovascularization response. We performed a clinical observational study of 80 elite volleyball players, monitoring the perfusion values of the supraspinatus tendons by oximetry. Results No statistically significant differences were found between the oximetry data and age, sex or years of sports activity, nor when comparing the right and left arm or the dominant and non-dominant arm. A statistically significant difference was found for the dominant arm values in relation to the competitive role, higher values being obtained in outside hitters (62.7% than middle hitters (53.7% (p = 0.01, opposite hitters (55.5% (p = 0.02 and libero players (54.4% (p = 0.008, whereas there were no differences in setters (56.2% (p > 0.05. Conclusions The different tendon vascularization values found in players with different roles in the team may be attributed to a response to the specific biomechanical demands posed by the different overhead throwing roles.

  10. Overload and neovascularization of shoulder tendons in volleyball players

    Science.gov (United States)

    2012-01-01

    Background In overhead sports like volleyball, the onset of a rotator cuff tendinopathy due to functional overload is a common observation. An angiofibroblastic etiopathogenesis has been hypothesized, whereby a greater anaerobic metabolism occurs in critical zones of the tendon with a lower degree of vascularization; this would induce collagen and extracellular matrix degradation, that could then trigger a compensatory neovascularization response. We performed a clinical observational study of 80 elite volleyball players, monitoring the perfusion values of the supraspinatus tendons by oximetry. Results No statistically significant differences were found between the oximetry data and age, sex or years of sports activity, nor when comparing the right and left arm or the dominant and non-dominant arm. A statistically significant difference was found for the dominant arm values in relation to the competitive role, higher values being obtained in outside hitters (62.7%) than middle hitters (53.7%) (p = 0.01), opposite hitters (55.5%) (p = 0.02) and libero players (54.4%) (p = 0.008), whereas there were no differences in setters (56.2%) (p > 0.05). Conclusions The different tendon vascularization values found in players with different roles in the team may be attributed to a response to the specific biomechanical demands posed by the different overhead throwing roles. PMID:22853746

  11. ACCOUNTABILITY SYSTEMS AND INSTRUCTIONAL APPROACHES IN YOUTH VOLLEYBALL TRAINING

    Directory of Open Access Journals (Sweden)

    Felismina Pereira

    2009-09-01

    Full Text Available The purpose of this study was to examine accountability systems operating in youth volleyball training sessions and to understand how those systems vary according to the instructional tasks and the nature of the information provided by coaches. Additionally, the interactive effect of the players' age group on accountability systems and instructional tasks will be inspected. Twenty-eight youth volleyball coaches (for under 14s and under 18s were observed, one training session each. Systematic observation strategies were used to describe and analyse task presentation and task structure during practice. Results convey that the accountability systems implemented by coaches were mainly implicit and governed by opportunity rather than explicit performance criteria imparted in task presentation. Remarks on the quality of performance only occurred during ongoing practice. More often than not coaches showed no reaction when athletes did not accomplish the tasks, failing to convey consequential expectancy-demand-monitoring messages. The instructional approach was predominantly composed of informing tasks, of technical nature and general information, which can reflect a technique and generalist coach profile. These results indicate the presence of weak and ambiguous accountability system, also corroborated by positive correlations of extending tasks with the category without exigency task presentation as well as with no reaction to unaccomplished tasks. There were no notorious differences in accountability behaviours between players' age group

  12. MEANING TO BE VOLLEYBALL PLAYER IN CAREER TRANSITION PHASE

    Directory of Open Access Journals (Sweden)

    Adriana Justino

    2016-09-01

    Full Text Available The objective of this study is to assess the meaning of being that a volleyball player for the under-19 players who are experiencing a transition in their in career. Sixteen male players aged 17 and 18 were evaluated, by being asked the triggering question “What does being a volleyball player mean to you?” The analysis of the discourses was carried out according to the procedures recommended by Miles & Huberman (2004. Four response categories resulted: psychoemotional and behavioral skills, emotions in sport, recognition and financial return, skills as an athlete/player. The athletes showed that the meaning of sport lies especially in the passion for practice, but also, in the improving of their tactics and techniques, in the development of psychoemotional and behavioral skills, in the professional recognition and, to a lesser degree, in the financial aspect. Most athletes state they intend to continue in the juvenile sports categories, therefore, understanding the meaning of this activity in their life can be the key to the elaboration of a plan of psychological preparation whose aim is to provide support to their needs in this moment of professional choice.

  13. Physical actions and work-rest time in men's beach volleyball

    Directory of Open Access Journals (Sweden)

    José Manuel Palao

    2014-09-01

    Full Text Available The purpose of this study was to assess the ball contacts, jumps, hits, work time, and rest ratio in male beach volleyball players in relation to their tactical roles. The sample of this study included 6970 rallies played by 91 beach volleyball players, which corresponded to 179 sets of the 2008 Men's Beach Volleyball World Tour (FIVB. We analyzed: ball contacts, jumps, hits, work time, rest time, set (first, second or third, and player's tactical role (e.g., defense specialist, blocker, or no specialization. A significantly higher number of jumps were executed by blockers. No differences were found in the third set for any of the physical variables studied. This paper provides references about the physical demands (e.g., contacts, jumps, and hits for blockers and defense specialists and temporal patterns of the beach volleyball game (i.e., work and rest time for two-set matches and three-set matches.

  14. The effect of aquatic plyometric training with and without resistance on selected physical fitness variables among volleyball players

    Directory of Open Access Journals (Sweden)

    K. KAMALAKKANNAN

    2011-06-01

    Full Text Available The purpose of this study is to analyze the effect of aquatic plyometric training with and without the use ofweights on selected physical fitness variables among volleyball players. To achieve the purpose of these study 36physically active undergraduate volleyball players between 18 and 20 years of age volunteered as participants.The participants were randomly categorized into three groups of 12 each: a control group (CG, an aquaticPlyometric training with weight group (APTWG, and an aquatic Plyometric training without weight group(APTWOG. The subjects of the control group were not exposed to any training. Both experimental groupsunderwent their respective experimental treatment for 12 weeks, 3 days per week and a single session on eachday. Speed, endurance, and explosive power were measured as the dependent variables for this study. 36 days ofexperimental treatment was conducted for all the groups and pre and post data was collected. The collected datawere analyzed using an analysis of covariance (ANCOVA and followed by a Scheffé’s post hoc test. The resultsrevealed significant differences between groups on all the selected dependent variables. This study demonstratedthat aquatic plyometric training can be one effective means for improving speed, endurance, and explosivepower in volley ball players

  15. Dominant vs. non-dominant shoulder morphology in volleyball players and associations with shoulder pain and spike speed.

    Science.gov (United States)

    Challoumas, Dimitrios; Artemiou, Andreas; Dimitrakakis, Georgios

    2017-01-01

    The aims of our study were to compare the dominant (DOM) and non-dominant (NDOM) shoulders of high-level volleyball athletes and identify possible associations of shoulder adaptations with spike speed (SS) and shoulder pathology. A total of 22 male volleyball players from two teams participating in the first division of the Cypriot championship underwent clinical shoulder tests and simple measurements around their shoulder girdle joints bilaterally. SS was measured with the use of a sports speed radar. Compared with the NDOM side, the DOM scapula was more lateralised, the DOM dorsal capsule demonstrated greater laxity, the DOM dorsal muscles stretching ability was compromised, and the DOM pectoralis muscle was more lengthened. Players with present or past DOM shoulder pain demonstrated greater laxity in their DOM dorsal capsule, tightening of their DOM inferior capsule, and lower SS compared with those without shoulder pain. Dorsal capsule measurements bilaterally were significant predictors of SS. None of the shoulder measurements was associated with team roles or infraspinatus atrophy, while scapular lateralisation was more pronounced with increasing years of experience, and scapular antetilting was greater with increasing age. Adaptations of the DOM shoulder may be linked to pathology and performance. We describe simple shoulder measurements that may have the potential to predict chronic shoulder injury and become part of injury prevention programmes. Detailed biomechanical and large prospective studies are warranted to assess the validity of our findings and reach more definitive conclusions.

  16. Testing expected and perceived service quality in the hotel industry

    Directory of Open Access Journals (Sweden)

    Vujko Aleksandra

    2015-01-01

    Full Text Available Guest satisfaction is the key to retaining existing and attracting new guests. In order to reach this goal, managers in hotels have become aware of the fact that the quality stay is reflected in the unique experiences of the tourists in particular. Guest satisfaction with hotel services can be tested by various methods. In this study, we used a questionnaire technique, in which respondents were guests of the hotel 'Vojvodina', 'Novi Sad' and 'Park' in Novi Sad, then the guests of the hotel 'Vojvodina' and 'Gold Class' in Zrenjanin, as well as the guests of the hotel 'Brothers Sekulic' in Zlatibor. The respondents were asked to evaluate various aspects of the business environment, employees' attitude towards guests, taste and variety of food and beverages. Data are presented in tables with brief comments. Based on the analysis of dependent and independent variables, we concluded that the physical features of a hotel, as well as the guest-employee relationship, are primarily related to the personal experience. Guests were the least satisfied with the hotel bar. These pieces of information are crucial for the hotel enterprises and contribute to the advancement of business through the adjustment of the product to the needs of the customer.

  17. The Role of Involvement in the Loyalty of Sport Fans in Professional Volleyball

    Directory of Open Access Journals (Sweden)

    Eleni Ζetou

    2013-12-01

    Full Text Available The purpose of this paper was to investigate the role of fan involvement with volleyball in their behavior (as expressed by loyalty towards their team in professional men’s volleyball League in Greece. The sample that was used included 521 fans that watched volleyball games in five venues in Athens and completed questionnaires that were handed to them. The questionnaires items were the Leisure Involvement Scale (5 Likert scale which was used by Nassis and Theodorakis (2008 and, for the evaluation of fan loyalty, the questionnaire (8 Likert scale by Theodorakis and Wann, (2008 both were used in Greek population. Correlated regression analyses were used. Results showed that volleyball fans had a high level of involvement as expressed by three factors, namely Attraction, Centrality and Self-Expression and loyalty as expressed by behaviors such as frequency of watching games/TV/radio and participating in conversations with friends revolving around sports. The correlation analysis showed a positive correlation between the involvement factors and the loyalty dimensions. Additionally, the linear regression analyses showed that the three factors of involvement predicted in different degrees a statistically significant percentage of specific indicators that express the loyalty of volleyball fans to their teams. The results can be utilized by professional teams’ executives for the creation of the profile of fan involvement with volleyball, thus aiming at discovering more efficient forms of communication with them.

  18. Risk factors for patellar tendinopathy in basketball and volleyball players: a cross-sectional study.

    Science.gov (United States)

    van der Worp, H; van Ark, M; Zwerver, J; van den Akker-Scheek, I

    2012-12-01

    Patellar tendinopathy (PT) has a multifactorial etiology, and many possible risk factors have been described in the literature. The findings are conflicting, though, and most research has been conducted on elite athletes. The aim of the current study is to determine the risk factors for PT in a large representative sample of basketball and volleyball players. Separate risk factors for men and women, basketball and volleyball players, and athletes with unilateral and bilateral PT were identified. All basketball and volleyball players between ages 18 and 35 from the Dutch Basketball Association and the Dutch Volleyball Association were invited to complete an online questionnaire on knee complaints and risk factors for PT. The logistic regression analyses included 2224 subjects. The risk factors for PT were age, playing at the national level, being male and playing volleyball (compared with playing basketball). The risk factors for men and women were comparable. Among volleyball players, outside hitters and middle blockers/hitters had an increased risk compared with setters. For basketball players, no risk factors could be identified. No differences in the risk factors were found between athletes with unilateral and bilateral PT. These findings should be taken into account for prevention and rehabilitation purposes. © 2011 John Wiley & Sons A/S.

  19. Analysis on Difference of Referee Enforcement between Gas Volleyball and Indoor Volleyball%气排球与室内排球裁判执法的区别

    Institute of Scientific and Technical Information of China (English)

    陈进波

    2012-01-01

    融运动技术、健身、娱乐、观赏于一体的气排球运动,是我国自1905年引进普通竞技排球以来,国内自主创新发明的实用新型排球项目。本文通过采用文献资料、比较分析、访谈等方法对气排球与室内排球裁判执法进行对比分析,找出气排球与室内排球裁判执法的不同之处进一步研究,并提出裁判员在执法过程中的公平性和准确性,为提高裁判工作能力和水平,推动气排球和室内排球进一步发展提供参考。%Gas volleyball sport, which integrates sports technology, fitness, entertainment and appreciation to- gether, is a kind of utility model volleyball that invented by domestic independent innovation since China intro- duced common volleyball skills in 1905. This paper, by using the method of literature review, comparative analy- sis, interviews and other methods, makes comparisons on the gas and indoor volleyball referees, and do further re- search on the differences of the referees on the two sport event, even put forwards the fairness and accuracy during referees, thus enhance the ability and level of referees in order to provide reference for promoting a further deve - lopment of gas volleyball and indoor volleyball.

  20. Body mass index and body fat percentage are associated with decreased physical fitness in adolescent and adult female volleyball players

    Directory of Open Access Journals (Sweden)

    Pantelis Theo Nikolaidis

    2013-01-01

    Full Text Available Background: The objectives of this study were to examine (a the prevalence of overweight/obesity, and (b the relationship between body mass index (BMI, body fat percentage (BF and physical fitness in adolescent and adult female volleyball players. Materials and Methods: Adolescent (n = 102, aged 15.2 ± 2.0 year and adult (n = 57, 25.9 ± 5.0 year players were examined for anthropometric characteristics and body composition, and performed the physical working capacity in heart rate 170 min -1 test, a force-velocity test, the Wingate anaerobic test (WAnT, sit-and-reach test (SAR, handgrip strength test (HST and countermovement vertical jump (CVJ. Results: Based on international BMI cut-off points, 27.5% (n = 28 of adolescent and 12.3% (n = 7 of adult participants were classified as overweight, with the prevalence of overweight being higher in girls than in women (χ2 = 4.90, P = 0.027. BMI was correlated with BF in both age groups (r = 0.72, P < 0.001 in girls; r = 0.75, P < 0.001 in women. Normal participants had superior certain physical and physiological characteristics than those who were overweight. For instance, normal girls and women had higher mean power during WAnT than their overweight counterparts (P = 0.003 and P = 0.009 respectively. Except for flexibility, BMI and BF were inversely related with physical fitness (e.g., BMI vs. HST r = -0.39, P < 0.001 in girls; BF vs. CVJ r = -0.45, P < 0.001 in women. Conclusion: The findings confirmed the negative effect of overweight and fatness on selected parameters of physical fitness. The prevalence of overweight in adolescent volleyball players was higher than in general population, which was a novel finding, suggesting that proper exercise interventions should be developed to target the excess of body mass in youth volleyball clubs.

  1. The Comparison of the Statistics Between China Team and Italy,United States,Japan in11th World Cup Women’s Volleyball%第11届世界杯中国女排与意、美、日统计指标比较

    Institute of Scientific and Technical Information of China (English)

    王小红; 茅菊兰

    2012-01-01

    By using the method of literature,video observation and mathematical statistics and other research methods,the eleventh women’s Volleyball World Cup women’s volleyball team of China and Italy,United States,Japan Women’s volleyball team of technical indicators(age,height,spike and block height) and technical indicators(serve,spike,block,such as statistics.) index to carry on the comparative analysis,research found that the Chinese women’s volleyball team age,serving,spiking and indicator of the presence of disadvantage,in height,spike,block and a blocking high index has certain advantages,for the Chinese women’s volleyball team is insufficient,research put forward reasonable adjust women’s volleyball spiking,age structure,improve service training suggestions.%采用文献资料、录像观察以及数理统计等研究方法,对第11届女排世界杯中国女排与意、美、日三国女排非技术指标(年龄、身高、扣球与拦网高度等)以及技术指标(发球、扣球、拦网、一传等)等统计指标进行了比较分析,研究发现中国女排的年龄、发球、扣球等指标存在劣势,在身高、扣球拦网高度、拦网以及一传等指标上具有一定优势,针对中国女排的不足,研究提出了合理调整女排年龄结构、提高扣球、发球的训练力度等建议。

  2. Perfection of the special preparation of volleyball players

    Directory of Open Access Journals (Sweden)

    Volodymyr Bogush

    2015-06-01

    Full Text Available Purpose: to develop and apply the complex of exercises for perfection of the special physical preparation of volleyball players and its constituents: special quickness, force, endurance. Material and Methods: sportsmen (candidates in sport masters, I and II digits inspected in age from 16 to 23 in an amount 40 persons; the special quickness and its constituents are probed: latent period of the reaction, the speed of individual movements; maximum force in various modes; endurance – speed, hopping, power. Results: at drawing on the offered complex of exercises the improvement of indexes of speed and endurance hopping, speed-power capabilities is marked at stimulation of tension of muscles in the conditions of development of a maximum of dynamic effort. Conclusions: terms and methods are certain for the effective conducting of training process, which provides optimum intercommunication of levels of bodily and functional conditions, technical and tactical preparation.

  3. Are Tendinopathies really a common injury in volleyball?

    Science.gov (United States)

    Bustos, Aldo; Locaso, Fernando

    2017-01-01

    Objectives: To perform a description of tendinopathies as an injury in volleyball high performance. Methods: An observational and prospective study was conducted from 2014-2016 in the senior Argentinian volleyball team. The same was held by two observers. Moreover, 78 athletes were evaluated. We support Dvorak’s claims that an injury is determined by the loss of at least one training session or a match. Results: 78 players were exposed to 21812 hours of training and matches. As a result 37 injuries were evaluated in 31 players. Taking into account tendinopathies, it can be said that 34 players consulted 412 times, showing a prevalence of 43.5% of the whole enquires but when we refer to the same pathology as injury the average lowers, presenting 8 lesions in 6 players and showing a prevalence of 7.6% as injuries. Incidence of tendon injuries is 0.32 per 1000 hours of exposure Tendon Injuries: 5 were patellar, 2 supraspinatus, 1 aquiles. 5 Slight, 2 moderate, 1 severe. Conclusion: Clearly, tendinopathy is a common problem in this sport but it is not a common cause of injury. This is demonstrated in prevalence rates whereas 43.5 % just consulted and 7,6 % suffer from real injuries. We think this might be due to several factors such as, advances in medical therapy, preventive protocols and increase in thresholds of pain that high-performance athletes can bear. In our experience this pathology was shown to be the third leading cause of injuries. In 2016 we did not deal with any case of injury for tendinopathy.

  4. Accountability systems and instructional approaches in youth volleyball training.

    Science.gov (United States)

    Pereira, Felismina; Mesquita, Isabel; Graça, Amândio

    2009-01-01

    The purpose of this study was to examine accountability systems operating in youth volleyball training sessions and to understand how those systems vary according to the instructional tasks and the nature of the information provided by coaches. Additionally, the interactive effect of the players' age group on accountability systems and instructional tasks will be inspected. Twenty-eight youth volleyball coaches (for under 14s and under 18s) were observed, one training session each. Systematic observation strategies were used to describe and analyse task presentation and task structure during practice. Results convey that the accountability systems implemented by coaches were mainly implicit and governed by opportunity rather than explicit performance criteria imparted in task presentation. Remarks on the quality of performance only occurred during ongoing practice. More often than not coaches showed no reaction when athletes did not accomplish the tasks, failing to convey consequential expectancy-demand-monitoring messages. The instructional approach was predominantly composed of informing tasks, of technical nature and general information, which can reflect a technique and generalist coach profile. These results indicate the presence of weak and ambiguous accountability system, also corroborated by positive correlations of extending tasks with the category without exigency task presentation as well as with no reaction to unaccomplished tasks. There were no notorious differences in accountability behaviours between players' age group. Key pointsAccountability systems implemented by coaches were mainly implicit and governed by opportunity rather than explicit performance criteria imparted in task presentation. Only during practice, coaches remark the performance quality, followed by participation/effort.The instructional approach was predominantly composed of informing tasks, of technical nature and general information, which can reflect a technique and generalist

  5. Considerations regarding the optimisation of the spike in modern volleyball

    Directory of Open Access Journals (Sweden)

    Hans-Eric REITMAYER

    2017-03-01

    Full Text Available The aim of this paper is to analyse in detail the aspects regarding increased efficiency of the spike in the game of volleyball, given the requirements of a flawless technique that will maximize the potential of the players. Our intention was to verify whether the steps of approach are unfolding in a uniformly accelerated motion and are leading to a vertical leap in the desired parameters at the moment of take off. We also wanted to check if the range of upper body motion is a determinant in the efficiency of the spike consisting in a high striking point and a remakable hitting force. Material and methods: The video footage was obtained from 6 players of “U” Timisoara’s volleyball team and 6 international players. For the analysis and processing of the footage the program Kinovea was used and the following parameters were assessed: striking speed(m/s, range of motion (cm and °, flexion between arm and forearm, angle of arm with the vertical at contact, movement speed for the first, second and third approach steps. Results: The international subjects had a 12 cm longer path of the hand in striking motion. Given the shorter segments of “U” Timisoara’s players, they compensate by having a 2° larger range of motion, above the elite players. We recorded diferent angles of the spiking arm with the vertical for the 2 groups, namely a mean of 24.5° for the elite players and just 15° for the players of “U” Timisoara. These aspects lead to a striking speed 3m/s higher for the international spikers compared to ”U” Timisoara sportsmen. Having measured a uniformly accelerated approach for the international subjects, “U” Timisoara’s players don’t respond to the same requirement with close values of the second and third step of approach.

  6. 78 FR 41129 - Market Test of Experimental Product - International Merchandise Return Service-Non-Published Rates

    Science.gov (United States)

    2013-07-09

    ... of Experimental Product -- International Merchandise Return Service--Non-Published Rates AGENCY: U.S... International Merchandise Return Service--Non-Published Rates in accordance with statutory requirements. DATES... will begin a market test of its International Merchandise Return Service (IMRS) Non-published Rate...

  7. A comparative study and classification on web service security testing approaches

    Directory of Open Access Journals (Sweden)

    Azadeh Esfandyari

    Full Text Available Web Services testing is essential to achieve the goal of scalable, robust and successful Web Services especially in business environment where maybe exist hundreds of Web Services working together. This Relatively new way of software development brings ou ...

  8. Volleyball Content Resources Development--"Volleyball mat ball"Technology%试析排球内容资源开发--以“垫球”技术为例

    Institute of Scientific and Technical Information of China (English)

    宋丽维

    2016-01-01

    排球运动项目具有“人—球—人”特征,按照竞技体育项目教材化的原则,并根据身体运动的要素对排球运动概念、排球垫球技术以及排球垫球游戏或比赛进行开发,为不同水平学生的排球学习提供丰富的课程资源。%Volleyball project has"man-ball-the"characteristic, according to the principle of competitive sports teaching material, and according to the physical movement of volleyball sports concept, the elements of volleyball mat ball technology and volleyball mat ball game or game development, to provide different levels of students' volleyball rich curriculum resources.

  9. Are the take-off and landing phase dynamics of the volleyball spike jump related to patellar tendinopathy?

    NARCIS (Netherlands)

    Bisseling, R.W.; Hof, A.L.; Bredeweg, S.W.; Zwerver, J.; Mulder, T.

    2008-01-01

    Objective: The causal mechanism of the chronic sports injury patellar tendinopathy is not well understood. The aim of the present study was to compare ankle and knee joint dynamics during the performance of the volleyball spike jump between healthy volleyball players (n = 8) and asymptomatic volleyb

  10. Pre-Activity and Post-Activity Stretching Perceptions and Practices in NCAA Division I Volleyball Programs

    Science.gov (United States)

    Judge, Lawrence W.; Bodey, Kimberly J.; Bellar, David; Bottone, Adam; Wanless, Elizabeth

    2010-01-01

    The purpose of this study was to determine if NCAA Division I women's volleyball programs were in compliance with suggested current pre- and post-activity stretching protocols. Questionnaires were sent to NCAA division I women's volleyball programs in the United States. Fifty six coaches (23 males & 33 females) participated in the study. Some…

  11. Are the take-off and landing phase dynamics of the volleyball spike jump related to patellar tendinopathy?

    NARCIS (Netherlands)

    Bisseling, R.W.; Hof, A.L.; Bredeweg, S.W.; Zwerver, J.; Mulder, T.

    Objective: The causal mechanism of the chronic sports injury patellar tendinopathy is not well understood. The aim of the present study was to compare ankle and knee joint dynamics during the performance of the volleyball spike jump between healthy volleyball players (n = 8) and asymptomatic

  12. Are the take-off and landing phase dynamics of the volleyball spike jump related to patellar tendinopathy?

    NARCIS (Netherlands)

    Bisseling, R.W.; Hof, A.L.; Bredeweg, S.W.; Zwerver, J.; Mulder, T.

    2008-01-01

    Objective: The causal mechanism of the chronic sports injury patellar tendinopathy is not well understood. The aim of the present study was to compare ankle and knee joint dynamics during the performance of the volleyball spike jump between healthy volleyball players (n = 8) and asymptomatic volleyb

  13. Effective Testing Principles for the Mobile Data Services Applications

    NARCIS (Netherlands)

    Srirama, S.; Kakumani, R.; Aggarwal, A.; Pawar, P.

    Wireless communication technologies like GPRS, UMTS and WLAN, combined with the availability of high-end, affordable mobile devices enable the development of the advanced and innovative mobile services. Devices such as mobile phones and Personal Digital Assistants let the users access a wide range

  14. Effective Testing Principles for the Mobile Data Services Applications

    NARCIS (Netherlands)

    Srirama, S.; Kakumani, R.; Aggarwal, A.; Pawar, P.

    2006-01-01

    Wireless communication technologies like GPRS, UMTS and WLAN, combined with the availability of high-end, affordable mobile devices enable the development of the advanced and innovative mobile services. Devices such as mobile phones and Personal Digital Assistants let the users access a wide range o

  15. 核心稳定性训练对青少年排球运动员专项运动能力的影响%Effect of Core Stability Training Program on Special Physical Ability in Youth Volleyball Players

    Institute of Scientific and Technical Information of China (English)

    赵亮; 申喆

    2015-01-01

    核心稳定性训练已应用于大多数竞技运动项目,但其对运动员专项运动能力的影响依然没有定论。为验证核心稳定性训练对青少年排球运动员专项运动能力的影响,研究选取青少年女子排球运动员18名,分为实验组(9名)和对照组(9名)。实验组除常规专项训练外,增加核心稳定性训练。对照组只进行常规专项训练。通过对8周训练前、后运动员排球专项运动能力和核心稳定性指标的测试和比较发现,经过8周核心稳定性训练后,实验组排球专项运动能力指标中除了助跑摸高成绩没有明显变化外,其余指标均高于训练前,核心稳定性测试指标也显著高于训练前;对照组则都没有明显变化。进而推测核心稳定性训练的确能够提升青少年排球运动员专项运动能力及核心稳定性。因此,青少年排球运动员应重视核心稳定性训练。%Although core stability training has been used in many sports,little is known about the effect in volleyball;particularly in youth volleyball players.The aim of this study was to in-vestigate the effect of an eight-week core stability training program on the special physical abil-ity of female youth volleyball players.1 8 female youth volleyball players are selected,and di-vided into experimental group (n= 9 )and control group (n= 9 ).The experimental group fol-lowed the routine volleyball training program with the addition of an eight-week core stability training program while the control group only received the routine volleyball training program. The results showed that the core stability training group improved their volleyball special phys-ical ability test performance significantly except the run-up height.Their core stability test per-formance was also improved significantly.This indicates that core stability training enhanced the female youth volleyball players’special physical ability and core stability

  16. SERVICE TEST OF CONTROLLER, DIFFERENTIAL PRESSURE, PIPELINE PUMP UNIT

    Science.gov (United States)

    Nineteen test items were operated for a total of 1,182 hours at Fort Lee, Virginia and at Hachinoehe POL Storage Area, Hachinohe, Japan, and were...satisfactory with respect to familiarization and training, maintenance and safety. The test items were suitable with respect to compatibility with...related equipment. The test items were unsatisfactory with respect to operational performance, durability and reliability.

  17. Como pensar o voleibol de praia sociologicamente How to think beach volleyball sociologicaly

    Directory of Open Access Journals (Sweden)

    Gilmar Francisco Afonso

    2012-03-01

    Full Text Available Este artigo trata de uma análise sociológica da história do Voleibol de Praia. Aqui procuramos responder: por que o desenvolvimento internacional da modalidade ocorreu no Brasil e não nos EUA? Como hipótese apresentamos que a estrutura do campo Voleibol de Praia vem sendo determinada pela disputa de duas instituições, a Federação Internacional de Voleibol (FIVB e a Association of Volleyball Professionals (AVP. Os objetivos foram investigar por que o Brasil foi o local onde o Voleibol de Praia se transformou em show business internacional e analisar as configurações entre os agentes/estruturas que compõem o campo. O recorte compreendeu o intervalo de 1985 a 2004. Como referencial teórico metodológico de análise, buscamos na teoria dos campos de Pierre Bourdieu o instrumental capaz de explicitar as relações que se estabelecem no contexto socioeconômico contemporâneo, aplicando-o na leitura do desenvolvimento do Voleibol de Praia. Constatamos que a FIVB assumiu o controle do campo e o Brasil passou a ser uma estrutura estruturante da modalidade.This study carried out a sociological analysis of the history of Beach Volleyball. The problem was: why has the development of Beach Volleyball as an international sport occurred in Brazil rather than in the USA? The hypothesis proposed that the framework of the field of Beach Volleyball has been defined by the dispute between two institutions, the Fèdèration Internationale de Volleyball (FIVB and the Association of Volleyball Professionals (AVP. The outlined goals were to investigate why Brazil came to be where Beach Volleyball was transformed into International Show Business and analyze the structure of the interdependent relationships among the sub components that make up the field. The proposed period included the years 1985 to 2004. The instrument capable of expounding the relationships that are established in the contemporary socioeconomic context was found in the 'theory of fields

  18. 9 CFR 113.6 - Animal and Plant Health Inspection Service testing.

    Science.gov (United States)

    2010-01-01

    ... 9 Animals and Animal Products 1 2010-01-01 2010-01-01 false Animal and Plant Health Inspection Service testing. 113.6 Section 113.6 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION... STANDARD REQUIREMENTS Applicability § 113.6 Animal and Plant Health Inspection Service testing. A...

  19. Performance indicators analysis at Brazilian and Italian women's volleyball leagues according to game location, game outcome, and set number.

    Science.gov (United States)

    Campos, Fabio A D; Stanganélli, Luiz C R; Campos, Leandra C B; Pasquarelli, Bruno N; Gómez, Miguel-Angel

    2014-04-01

    This study was done to investigate the advantage of playing at home in elite women's volleyball leagues and the influence of performance indicators in the game score according to set number. The sample consisted of 240 games of the Brazilian Volleyball League (n = 132 games) and the Italian Volleyball League (n = 108 games) from the 2011-2012 season. The relationship of performance indicators (including serve, attack, block, and opponents' errors) with the game outcome (win or lose) was assessed. The results showed that there was a home advantage effect in women's volleyball leagues, with a higher prevalence of victory for the home teams in Brazilian and Italian leagues (58 and 56%, respectively). When related to the performance indicators and among the aspects that were most highly correlated with victory, the attack was the technical indicator that explained most of the results of volleyball games.

  20. Influence of dorsiflexion shoes on neuromuscular fatigue of the plantar flexors after combined tapping-jumping exercises in volleyball players.

    Science.gov (United States)

    Lapole, Thomas; Ahmaidi, Said; Gaillien, Benjamin; Leprêtre, Pierre-Marie

    2013-07-01

    Dorsiflexion shoes could be useful to increase jumping performance. The aim of the present study was to investigate the impact of wearing shoes inducing moderate dorsiflexion (2°) on neuromuscular fatigue induced by volleyball exercises involving multiple stretch-shortening cycles. Squat jump (SJ) and countermovement jump (CMJ) performance, and plantar flexors isometric voluntary and evoked contractile properties were assessed in 10 unfamiliarized trained volleyball players before and after a 10-minute intensive combined tapping-jumping volleyball exercise performed, in blinded randomized conditions, with neutral (0°) or moderate dorsiflexion (2°). No significant difference was observed on SJ performance in neutral and moderate dorsiflexion conditions. However, CMJ height was initially lower with 2° dorsiflexion compared with 0° (p volleyball exercise also induced a significant decrease in maximal voluntary contraction (p volleyball players.

  1. Association of anthropometric qualities with vertical jump performance in elite male volleyball players.

    Science.gov (United States)

    Aouadi, R; Jlid, M C; Khalifa, R; Hermassi, S; Chelly, M S; Van Den Tillaar, R; Gabbett, T

    2012-02-01

    The objective of this study was to examine the association between physical and anthropometric profiles and vertical jump performance in elite volleyball players. Thirty-three elite male volleyball players (21±1 y, 76.9±5.2 kg, 186.5±5 cm) were studied. Several anthropometric measurements (body mass, stature, body mass index, lower limb length and sitting height) together with jumping height anaerobic power of counter movement jump with arm swing (CMJarm) were obtained from all subjects. Forward stepwise multiple linear regression analysis was performed to determine if any of the anthropometric parameters were predictive of CMJarm. Anaerobic power was significantly higher (P≤0.05) in the tallest players relative to their shorter counterparts. A significant relationship was observed between CMJarm and lower limb length (r2=0.69; P0.05) predictors of CMJarm performance. This study demonstrates that lower limb length is correlated with CMJarm in elite male volleyball players. The players with longer lower limbs have the better vertical jump performances and their anaerobic power is higher. These results could be of importance for trained athletes in sports relying on jumping performance, such as basketball, handball or volleyball. Thus, the measurement of anthropometric characteristics, such as stature and lower limb length may assist coaches in the early phases of talent identification in volleyball.

  2. Analysis of the association between isokinetic knee strength with offensive and defensive jumping capacity in high-level female volleyball athletes.

    Science.gov (United States)

    Sattler, Tine; Sekulic, Damir; Esco, Michael R; Mahmutovic, Ifet; Hadzic, Vedran

    2015-09-01

    Isokinetic-knee-strength was hypothesized to be an important factor related to jumping performance. However, studies examining this relation among elite female athletes and sport-specific jumps are lacking. This investigation determined the influence of isokinetic-knee flexor/extensor strength measures on spike-jump (offensive) and block-jump (defensive) performance among high-level female volleyball players. Cross-sectional laboratory study. Eighty-two female volleyball athletes (age = 21.3 ± 3.8 years, height = 175.4 ± 6.76 cm, and weight = 68.29 ± 8.53 kg) volunteered to participate in this study. The studied variables included spike-jump and block-jump performance and a set of isokinetic tests to evaluate the eccentric and concentric strength capacities of the knee extensors (quadriceps - Q), and flexors (hamstring - H) for both legs. Both jumping tests showed high intra-session reliability (ICC of 0.87 and 0.95 for spike-jump and block-jump, respectively). The athletes were clustered into three achievement-groups based on their spike-jump and block-jump performances. For the block-jump, ANOVA identified significant differences between achievement-groups for all isokinetic variables except the Right-Q-Eccentric-Strength. When observed for spike-jump, achievement-groups differed significantly in all tests but Right-H-Concentric-Strength. Discriminant canonical analysis showed that the isokinetic-strength variables were more associated with block-jump then spike-jump-performance. The eccentric isokinetic measures were relatively less important determinants of block-jump than for the spike-jump performance. Data support the hypothesis of the importance of isokinetic strength measures for the expression of rapid muscular performance in volleyball. The results point to the necessity of the differential approach in sport training for defensive and offensive duties. Copyright © 2014 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.

  3. System Service Test Operations Procedure ’Tool Sets’.

    Science.gov (United States)

    compatibility with related equipment, transportability, maintainability, and reliability. It provides guidance for evaluation of maintenance of the test items with an analysis method for evaluating maintenance literature. (Author)

  4. Effect of four different starting stances on sprint time in collegiate volleyball players.

    Science.gov (United States)

    Johnson, Trevor M; Brown, Lee E; Coburn, Jared W; Judelson, Daniel A; Khamoui, Andy V; Tran, Tai T; Uribe, Brandon P

    2010-10-01

    Starting stance plays an important role in influencing short-distance sprint speed and, therefore, the ability to reach a ball during sport play. The purpose of this study was to evaluate 4 different starting stances on sprint time. Twenty-six male and female collegiate volleyball players volunteered to participate in 1 testing session. Each subject performed 3 15-ft sprint trials at each of 4 different starting stances (P-parallel, FS-false step, S-staggered, and SFS-staggered false step) in random order. Analysis of variance revealed that there was no significant interaction of sex by stance, but there were main effects for sex (men were faster than women) and stance. The FS (1.18 ± 0.10 seconds), S (1.16 ± 0.07 seconds), and SFS (1.14 ± 0.06 seconds) stances were faster than the P (1.25 ± 0.09 seconds) stance, and the SFS stance was faster than the FS stance. This indicates that starting with a staggered stance (regardless of stepping back) produced the greatest sprinting velocity over the initial 15 feet. Although taking a staggered stance seems counterproductive, the resultant stretch-shortening cycle action and forward body lean likely increase force production of the push-off phase and place the total body center of mass ahead of the contacting foot, thereby, decreasing sprint time.

  5. Empty alcohol containers and breath alcohol analysis measures of alcohol consumption at a college volleyball championship.

    Science.gov (United States)

    Podstawski, Robert; Wesołowska, Elżbieta; Choszcz, Dariusz

    2015-01-01

    This article provides information on the amount of alcohol consumed by students during college sports events. It examines the relationship between alcohol consumption and the rank of the match, sex of the players (male vs. female league), and sex of the spectators. The study was carried out during an interdepartmental volleyball championship (cup system) at the University of Warmia and Mazury in Olsztyn (Poland), which included 16 matches (in both male and female leagues). The research sample consisted of 2,683 students between ages 19 and 24 years (including 1,768 men and 915 women) who came to cheer on their peers at the matches. Two objective measurements of alcohol consumption were used: (a) the number of empty alcohol packages left behind by the spectators at the sports facilities after each match and (b) breath alcohol analysis tests given to volunteering spectators after each match (in which 323 persons consented to participate). Male league games were accompanied by more alcohol consumption than were female league games, and male spectators drank more than female spectators. The most drinking occurred among men watching the male league, and the least amount of drinking occurred among women watching the female league. Alcohol intoxication increased with the rank of the match mostly among men watching the male league. The sex of players and spectators seems to be a mediating factor in the relationship between the rank of a match and the amount of alcohol consumed.

  6. Somatotype, role and performance in elite volleyball players.

    Science.gov (United States)

    Gualdi-Russo, E; Zaccagni, L

    2001-06-01

    The purpose of the present study was to examine the importance of the somatometric components of elite male and female volleyball players in relation to their different game roles and levels of performance. Two hundred and thirty-four male athletes (aged 24.7+/-4.4 years) and 244 female athletes (aged 23.1+/-4.4 years) from the Italian A1 and A2 volleyball leagues underwent anthropometric measurements during the 1992-1993 and 1993-1994 seasons. Somatotypes were estimated with the Heath-Carter method. Marked sexual dimorphism in somatotype was observed in the total sample. The average somatotype for men was 2.2-4.2-3.2 (SD 0.7-0.9-0.9), and for women it was 3.0-3.3-2.9 (SD 0.8-1.0-0.9). The somatotype was significantly different in players at different levels of performance (A1 vs A2 leagues), as it follows: 2.1-4.1-3.3 (SD 0.6-0.8-0.7) vs 2.3-4.3-3.0 (SD 0.7-1.0-0.8) in males; 2.9-3.1-3.0 (SD 0.8-1.0-0.9) vs 3.1-3.5-2.7 (SD 0.8-0.9-0.8) in females. The somatotype was also significantly different in players in different roles. In male sex the mean somatotypes for setters were 2.4-4.5-2.8 (SD 0.7-0.9-0.8), for centres they were 2.0-4.0-3.5 (SD 0.6-1.0-0.8), for spikers they were 2.2-4.3-3.0 (SD 0.6-0.9-0.7), for opposites they were 2.2-4.3-3.1 (SD 0.6-0.9-0.8). In female sex the mean somatotypes for setters were 3.1-3.6-2.5 (SD 0.8-1.0-1.0), for centres they were 2.8-3.1-3.1 (SD 0.8-0.9-0.7), for spikers they were 3.0-3.5-2.8 (SD 0.9-1.0-0.9) and for opposites they were 3.0-3.2-3.0 (SD 0.7-0.9-0.8). The physique of athletes in the A1 league is characterized by higher ectomorphy and lower endomorphy and mesomorphy. There is also a slight tendency of male players to a greater homogeneity in somatotype within the group at the maximum level of performance. Moreover somatotype differs in relation to game role in volleyball players of both sexes: the mesomorphic component is maximal in setters, while the ectomorphic component is maximal in centres.

  7. Discriminant effect of morphology and range of attack on the performance level of volleyball players. DOI: 10.5007/1980-0037.2011v13n3p223

    Directory of Open Access Journals (Sweden)

    Victor Machado Reis

    2011-04-01

    Full Text Available The aim of this study was to identify the discriminant effect of morphology and range of attack-related variables on the performance level of under-17 female volleyball players. The sample consisted of young volleyball players (n=40 divided into two groups: players of the Brazilian national team (n=21 aged 15.86 ± 0.36 years, body weight of 68.11 ± 8.73 kg, and height of 181.61 ± 6.11 cm, and players of the state team of Rio Grande do Norte (n=19 aged 15.16 ± 0.88 years, body weight of 60.54 ± 7.60 kg, and height of 170.52 ± 7.97 cm. The somatotype was assessed using the Heath & Carter method. A modified Sargent test was used to assess vertical jump height and maximum attack height. The measures were compared between the two groups using the Student t-test for independent samples. Discriminant function analysis was applied to predict group allocation using the measures obtained as independent variables. The two groups differed significantly in terms of body weight, fat mass, height, maximum attack height, range of attack, and somatotype. Discriminant function analysis identified the somato-type measures (endomorphy, ectomorphy, and mesomorphy with correlation coefficients below 0.30. The canonical correlation coefficient obtained with this function was 0.856. In conclusion, somatotype or vertical jump ability does not seem to distinguish elite athletes from non-elite athletes in under-17 female volleyball players, and height is the main morphological determinant to achieve elite level performance.

  8. Contact psychophysiological and neural functions with technical and tactical readiness volleyball

    Directory of Open Access Journals (Sweden)

    Glazyrin I.D.

    2013-06-01

    Full Text Available Set the level of neural development, psycho-physiological functions in highly skilled volleyball players. Defined technical and tactical preparedness highly skilled volleyball players in the competitive period of the annual cycle of training. The study involved six masters of sport and 8 candidates for the master of sports. That the quality of play activities and the successful execution of technical elements depend on functional mobility, strength and reactivity of nerve processes, associative thinking, memory and attention. The results, which may have a prognostic value. It is shown that the neurodynamic functions are genetically determined. It is recommended to use them for the initial recruitment and selection stages for sports improvement. The necessity influence the types of thinking, memory and attention in the training process of volleyball players.

  9. Does athletic training in volleyball modulate the components of visual evoked potentials? A preliminary investigation.

    Science.gov (United States)

    Zwierko, Teresa; Lubiński, Wojciech; Lesiakowski, Piotr; Steciuk, Hanna; Piasecki, Leszek; Krzepota, Justyna

    2014-01-01

    This longitudinal study investigated visual evoked potentials (VEPs) in 11 young female volleyball players who participated in extensive training for 2 years. The control group consisted of 7 age-matched female students who were not involved in any regular sports activity. Recordings of VEPs were performed twice: baseline recording (i.e., before training began) and after 2 years of systematic, volleyball-specific athletic training. The effect of athletic training on visual signal conductivity was assessed by recording the latency of N75, P100 and N135 components of the VEPs waveform. Extensive experience with volleyball training reduced signal conductivity time through visual pathway. Specifically, the latency of P100 was reduced on average by 2.2 ms during binocular viewing. Moreover, athletes had reduced N75 latency (difference of 3.3 ms) for visual stimuli that generated greater response from peripheral retina. These results indicate that sport training can affect very early sensory processing in athletes.

  10. Test-Driven Development of IEEE 1451 Transducer Services and Application

    Directory of Open Access Journals (Sweden)

    S. Ranđić

    2012-06-01

    Full Text Available IEEE 1451 standard defines the methods of integrating smart transducers into communicating networks. Interface between a user application and a field of transducers, known as Transducer Services API is defined by standrad IEEE 1451.0. This paper presents the use of Test- Driven Design (TDD in developing methods for accessing transducer services using Transducer Services API and developing web applications which access this services over the network. The characteristics of TDD and its benefits are presented and the way of realization for one method is shown using Java and JUnit framework to run tests.

  11. A generic usability test environment for webbased services

    NARCIS (Netherlands)

    Lindenberg, J.; Neerincx, M.A.

    1999-01-01

    Er is een softwaretool ontwikkeld voor het uitvoeren van gebruikerstesten van Internetdiensten. De tool kan worden gebruikt om een test op te zetten, uit te voeren en alle gegenereerde data vast te leggen.

  12. Study on service test procedure for SMES systems

    Energy Technology Data Exchange (ETDEWEB)

    Ren, L., E-mail: rl8868@126.co [R and D Center of Applied Superconductivity, Huazhong University of Science and Technology, Wuhan 430074 (China); Tang, Y.; Li, J.; Shi, J. [R and D Center of Applied Superconductivity, Huazhong University of Science and Technology, Wuhan 430074 (China); Hu, Y. [State Grid Electric Power Research Institute, Wuhan 430074 (China); Guo, F.; Chen, L.; Cheng, S. [R and D Center of Applied Superconductivity, Huazhong University of Science and Technology, Wuhan 430074 (China)

    2009-10-15

    Some superconducting magnetic energy storage (SMES) systems have been developed successfully, and the function of them was verified by experiment. Considering the impact on the system security and stability when they are connected to the power system, it is important to build a standard test procedure and propose the main experimental contents for some representative superconducting devices. Based on the experimental results of a 35 kJ/7 kW conduction-cooled high-T{sub c} SMES system, which was developed by Huazhong University of Science and Technology, the test items and methods for a conduction-cooled high-T{sub c} SMES system are studied. For performance evaluation of this high-T{sub c} SMES, three superconducting magnet performance tests, power conditioning characteristic test and dynamic experiment in a simulated power system were fulfilled.

  13. Offering a model for measuring service brand equity in the field of services : Testing and implementation in a virtual university.

    Directory of Open Access Journals (Sweden)

    Mehdi Giahchin

    2013-09-01

    Full Text Available Nowadays brand in businesses around the world including service provider companies, has a special role and a great importance.Brand equity is also a powerful tool in the marketing competitionthus managing the brand equity measurement is consequential. In this study we are trying to find some effective dimensions of the brand equity in the service firms and companies and after that we are going to offer some significant dimensions as a comprehensive model in education and e-learning at the level of higher education with considering different aspects of the products and services and also with considering the different aspects of service businesses on the services spectrumthen test the model statistically in a virtual university. Data collection was done through a questionnaire distributed to all 1031 faculty, students and staff of Mehralborz university and 300 responses were received. Sampling was done through random method and the sample volume based on Cochran's formula was 280 persons. Cronbach's alpha was used to ensure the reliability of the questionnaire and structural equation modeling was used to test the model. The consequences of statistical analysis showed that among the factors related to the customers, just experiences and psychological characteristics of faculty, students and staff are effective on the service brand equity of Mehralborz university.And also among the factors related to the brand awareness,just marketing activities are effective on the service brand equity of Mehralborz uiversity. Among the characteristics offered for the brand image,just symbolic characteristics and servicescape and also servise provider characteristics are effective on the service brand equity of Mehralborz university.

  14. Analysis of male volleyball players' motor activities during a top level match.

    Science.gov (United States)

    Mroczek, Dariusz; Januszkiewicz, Aleksander; Kawczyński, Adam S; Borysiuk, Zbigniew; Chmura, Jan

    2014-08-01

    The present study aims to assess motor activity of volleyball players using an original video recording method developed by the authors. Twenty-eight volleyball players taking part in 4 matches of the Polish Volleyball League were examined. The recorded data were analyzed in view of the mean total distance covered by volleyball players on different court positions during a match, set, and rally. The results showed that volleyball players cover the mean total distance of 1221 ± 327 m (mean ± SD) in a 3-set match, and 1757 ± 462 m in a 4-set match. A statistically significant difference (p ≤ 0.005) was found between the distance covered by the middle blockers and setters, defenders, spikers, and libero players in a match and in a set. The study revealed a tendency to lengthen the distance by the players in the final sets, which is indicative of the extended time of individual rallies. The mean distance covered in a single rally amounted to 10.92 ± 0.9 m in 4 matches (between 9.12 and 12.56 m). Considering the limited size of the field of play, volleyball players cover relatively long distances during a match and individual sets, with the shortest distance covered by middle blockers, and the longest by setters. From a practical application point of view, detailed topographic analysis of a player's movements on the court as well as precise data on the time of activity and rest breaks provide the coach with valuable information on the ways of development of arrhythmic, changing and dynamic training loads.

  15. HIV Testing and HIV/AIDS Treatment Services in Rural Counties in 10 Southern States: Service Provider Perspectives

    Science.gov (United States)

    Sutton, Madeline; Anthony, Monique-Nicole; Vila, Christie; McLellan-Lemal, Eleanor; Weidle, Paul J.

    2010-01-01

    Context: Forty percent of AIDS cases are reported in the southern United States, the region with the largest proportion of HIV/AIDS cases from rural areas. Data are limited regarding provider perspectives of the accessibility and availability of HIV testing and treatment services in southern rural counties. Purpose: We surveyed providers in the…

  16. HIV Testing and HIV/AIDS Treatment Services in Rural Counties in 10 Southern States: Service Provider Perspectives

    Science.gov (United States)

    Sutton, Madeline; Anthony, Monique-Nicole; Vila, Christie; McLellan-Lemal, Eleanor; Weidle, Paul J.

    2010-01-01

    Context: Forty percent of AIDS cases are reported in the southern United States, the region with the largest proportion of HIV/AIDS cases from rural areas. Data are limited regarding provider perspectives of the accessibility and availability of HIV testing and treatment services in southern rural counties. Purpose: We surveyed providers in the…

  17. An Adaptive Approach to Locating Mobile HIV Testing Services.

    Science.gov (United States)

    Gonsalves, Gregg S; Crawford, Forrest W; Cleary, Paul D; Kaplan, Edward H; Paltiel, A David

    2017-07-01

    Public health agencies suggest targeting "hotspots" to identify individuals with undetected HIV infection. However, definitions of hotspots vary. Little is known about how best to target mobile HIV testing resources. We conducted a computer-based tournament to compare the yield of 4 algorithms for mobile HIV testing. Over 180 rounds of play, the algorithms selected 1 of 3 hypothetical zones, each with unknown prevalence of undiagnosed HIV, in which to conduct a fixed number of HIV tests. The algorithms were: 1) Thompson Sampling, an adaptive Bayesian search strategy; 2) Explore-then-Exploit, a strategy that initially draws comparable samples from all zones and then devotes all remaining rounds of play to HIV testing in whichever zone produced the highest observed yield; 3) Retrospection, a strategy using only base prevalence information; and; 4) Clairvoyance, a benchmarking strategy that employs perfect information about HIV prevalence in each zone. Over 250 tournament runs, Thompson Sampling outperformed Explore-then-Exploit 66% of the time, identifying 15% more cases. Thompson Sampling's superiority persisted in a variety of circumstances examined in the sensitivity analysis. Case detection rates using Thompson Sampling were, on average, within 90% of the benchmark established by Clairvoyance. Retrospection was consistently the poorest performer. We did not consider either selection bias (i.e., the correlation between infection status and the decision to obtain an HIV test) or the costs of relocation to another zone from one round of play to the next. Adaptive methods like Thompson Sampling for mobile HIV testing are practical and effective, and may have advantages over other commonly used strategies.

  18. Modern way of training high-level volleyball players in a university.

    Directory of Open Access Journals (Sweden)

    Aleshin V.A.

    2011-02-01

    Full Text Available The issues of improving the effectiveness of preparing volleyball players in a university were considered. The questionnaire date of coaches and student-sportsmen were used. The experience of sports training of several hundred volleyball players, athletes and swimmers, who successfully participated in international arenas was summarized. It is stated that high sport results effectively provide hard sport selection, motivation and mobilization of student-sportsmen, hard workloads, frequent, up to 30-40 times a year, participation in important competitions, system of recovering event, combining sport and study.

  19. DETERMINATION OF THE ASSERTIVENESS AND PROBLEM SOLVING SKILLS OF BASKETBALL AND VOLLEYBALL REFEREES

    OpenAIRE

    Ridvan EKMEKCI

    2016-01-01

    It is very important to determine sport officials’ problem solving skills and assertiveness as a manager on the court. The purpose of this study was to examine assertiveness and problem solving skills of basketball and volleyball referees. 214 basketball referees (186 males and 28 females) ranging in age from 21 to 48 years (M = 28.58. SD = 4.69) and 177 volleyball referees (112 males 65 females) ranging in age from 23 to 55 years (M = 39.21. SD = 6.36) participated to this study voluntarily ...

  20. Development of muscular imbalance in the shoulder girdle in volleyball players

    OpenAIRE

    VRBOVÁ, Lucie

    2011-01-01

    This bachelor?s thesis deals with the development of muscular imbalance in the shoulder girdle in volleyball players. The volleyball player?s shoulder is the most exposed and vulnerable joint. In addition, the way the sport has developed, the pressure on this joint has grown. Shoulder pain limits the player?s most important move: the strength and the power of the smash and the smash serve. This thesis consists of two parts: theoretical and a practical. The theoretical part deals with the anat...

  1. Comparison of posture among adolescent male volleyball players and non-athletes

    OpenAIRE

    Grabara, M

    2014-01-01

    Due to high training loads and frequently repeated unilateral exercises, several types of sports training can have an impact on the process of posture development in young athletes. The objective of the study was to assess and compare the postures of adolescent male volleyball players and their non-training peers. The study group comprised 104 volleyball players while the control group consisted of 114 non-training individuals aged 14-16 years. Body posture was assessed by the Moiré method. T...

  2. AN INTEGRATED SERVICE EXCELLENCE MODEL FOR MILITARY TEST AND EVALUATION FACILITIES

    Directory of Open Access Journals (Sweden)

    Gerhard De Coning

    2011-08-01

    Full Text Available The purpose of this article is to introduce an Integrated Service Excellence Model (ISEM for empowering the leadership core of the capital-intensive military test and evaluation facilities to provide strategic military test and evaluation services and to continuously improve service excellence by ensuring that all activities necessary to design, develop and implement a test and evaluation service are effective and efficient. In order to develop the ISEM, various management tools and productivity and quality models were identified and tested through an empirical study conducted amongst the various test and evaluation facilities’ leadership core. Solutions to financial, human resource and environmental challenges as well as quality standards were built into the ISEM. Governance principles and leadership perceptions and recommendations further contributed to the development of the ISEM.

  3. Tracking of Ball and Players in Beach Volleyball Videos

    Science.gov (United States)

    Gomez, Gabriel; Herrera López, Patricia; Link, Daniel; Eskofier, Bjoern

    2014-01-01

    This paper presents methods for the determination of players' positions and contact time points by tracking the players and the ball in beach volleyball videos. Two player tracking methods are compared, a classical particle filter and a rigid grid integral histogram tracker. Due to mutual occlusion of the players and the camera perspective, results are best for the front players, with 74,6% and 82,6% of correctly tracked frames for the particle method and the integral histogram method, respectively. Results suggest an improved robustness against player confusion between different particle sets when tracking with a rigid grid approach. Faster processing and less player confusions make this method superior to the classical particle filter. Two different ball tracking methods are used that detect ball candidates from movement difference images using a background subtraction algorithm. Ball trajectories are estimated and interpolated from parabolic flight equations. The tracking accuracy of the ball is 54,2% for the trajectory growth method and 42,1% for the Hough line detection method. Tracking results of over 90% from the literature could not be confirmed. Ball contact frames were estimated from parabolic trajectory intersection, resulting in 48,9% of correctly estimated ball contact points. PMID:25426936

  4. [Eating habits of a group of professional volleyball players].

    Science.gov (United States)

    Gacek, Maria

    2011-01-01

    The aim of the research was an analysis of the eating habits of professional volleyball players according to their sex and age. The research has been carried out on a group of 210 men players and women players at the age of 13-25, representatives of sports clubs in Ostrołeka, Myślenice, Bydgoszcz and Warszawa. The research has revealed a limited realisation of rational diets by both men and women players. The most common mistakes made by them include a smaller number of meals during the day than recommended (especially among men), taking up training on empty stomach and insufficient frequency of consumption of dairy products, fish, vegetables and fruit. The research has also revealed excessive consumption of sweets, sweet sparkling drinks and fast food (mainly among men). The examined players to some extent only apply regular strategies of rehydration of their organisms. A high percentage of them do not pay attention to supplementation of liquids after an effort or they drink a lot of liquids at one time. The most frequently chosen drinks were mineral water and isotonic drinks. Supplementation was applied by a small percentage of the players, mainly men, who most often chose vitamins, Izostar, creatine, L-carnitine and HMB.

  5. Optimal temporal placement of the call in beach volleyball

    Directory of Open Access Journals (Sweden)

    Stefan Künzell

    2016-05-01

    Full Text Available The call is a tactical component in beach volleyball attacks. Through the call, the setter indicates to his or her teammate an open spot in the opponent’s court. In two experimental conditions, we investigated the interval between the call and the ball-hand contact (“call shot interval”, CSI of top-level athletes. We show that the probability that a given call is followed is dependent on the duration of the CSI and the number of call options. Longer CSIs result in an increased probability that the given call will be followed, whilst increasing the call options results in a decrease in probability. On average, there is a 50% probability that the call will be followed if the call precedes the shot by 460 ms and if a single call option (“line” is expected. If the attacker has to choose between three call options (“line”, “cut”, “no-one” a 50% probability that the call will be followed is observed at an CSI of 542 ms. It did not appear that gender influenced the ability to follow a call. We recommend that in practice and in competition, players and coaches should consider the proper duration of the CSI for effective calling.

  6. Influência do voleibol na densidade mineral ossea de adolescentes do sexo feminino Influence of volleyball in the bone mineral density of female adolescents

    Directory of Open Access Journals (Sweden)

    Wisley Gontijo de Mesquita

    2008-12-01

    Full Text Available Sabe-se que esportes com grandes cargas mecânicas e maior impacto do corpo com o solo resultam em maior massa óssea do que atividades em que o peso do corpo é pouco solicitado. Apesar de o voleibol estar entre os esportes considerados de alto impacto, existem poucos estudos que relacionam sua prática ao desenvolvimento da densidade mineral óssea (DMO. Portanto, o presente estudo teve como objetivo comparar a DMO entre garotas participantes de equipes de treinamento de voleibol e de garotas participantes de atividade física escolar. Foram avaliadas 60 voluntárias com idade entre 13 e 17 anos. Elas foram divididas em grupo voleibol (GV - composto pelas praticantes de voleibol - e grupo controle (GC. Foram mensurados massa corporal, estatura, consumo de cálcio, DMO do corpo inteiro, da cabeça, do colo do fêmur e do triângulo de Wards e estágio de maturação sexual. Foi utilizado o teste t para amostras independentes, para comparar a diferença entre as médias dos dois grupos (p Several studies have shown that high impact weight-bearing sports are more beneficial than non-weight-bearing ones. Despite being considered a high impact sport, few studies relate it with bone mineral density (BMD development. Therefore, the aim of this study was to compare BMD between female volleyball players and 60 volunteer girls aged 13-17-y who participated in this study. They were classified in Volleyball Group (VG - who were practicing volleyball - and Control Group (CG. Body mass, height, calcium uptake, total body, head, femoral neck and Wards Triangle BMD and sexual maturation were measured. Differences between groups were analyzed by t-test for independent samples (p < 0.05. The VG was statistically higher in total body (1.174 ± 0.065, femoral neck (1.164 ± 0.096 and Wards triangle (1.111 ± 0.138 BMD than CG (total body: 1.083 ± 0.082; femoral neck: 0.998 ± 0.142; Wards triangle: 0.944 ± 0.178; however, head BMD was not different between

  7. A panel priority rating exercise for the British Forces Germany Health Services Market test.

    Science.gov (United States)

    Jefferson, T O; Demicheli, V

    1995-02-01

    We report on the application to the BFG Health Services Market Testing (MT) study of the response to a users' questionnaire and panel discussions to determine in which priority and how services should be provided. The questionnaire served to inform lay and health care panel members on users' views on the relative importance of future health services and the way they will be provided. Based on the questionnaire results and data contained in the BAOR Report of Public Health for 1992/93 the panel assigned the highest priorities to emergency services, followed by routine General Practitioner services and essential hospital services. The lowest ranking were non-essential hospital services, health care for children with special needs and provision of designated transport. There was a high consistency in views between the lay and health care members of the panel.

  8. Risk factors associated with self-reported symptoms of digital ischemia in elite male volleyball players in the Netherlands.

    Science.gov (United States)

    van de Pol, D; Kuijer, P P F M; Langenhorst, T; Maas, M

    2014-08-01

    One in every four elite male volleyball players in the Netherlands reported blue or pale digits in the dominant hand. Little is known about risk factors. To assess whether personal-, sports-, and work-related risk factors are associated with these symptoms in these volleyball players, a survey was performed among elite male volleyball players in the Dutch national top league and in the Dutch beach volleyball team. The questionnaire assessed the presence of symptoms and risk factors. Binary logistic regression was performed to calculate odds ratios (ORs). A total of 99 of the 107 athletes participated - a response rate of 93%. Two sports-related risk factors were associated with symptoms of blue or pale digits: 18-30 years playing volleyball [OR = 6.70; 95% confidence interval (CI) 1.12-29.54] and often/always performing weight training to increase dominant limb strength (OR = 2.70; 95% CI 1.05-6.92). No significant other sports-, personal-, or work-related risk factors were found. Playing volleyball for more than 17 years and often/always performing weight training to increase dominant limb strength were independently associated with an increased risk on ischemia-related complaints of the dominant hand in elite male volleyball players. © 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  9. Effects of prolonged intensive training on the resting levels of salivary immunoglobulin A and cortisol in adolescent volleyball players.

    Science.gov (United States)

    Li, T L; Lin, H C; Ko, M H; Chang, C K; Fang, S H

    2012-10-01

    Concerns have been raised regarding the effects of prolonged intensive training on adolescent athletes. This study investigated the differences in mucosal immune functions and stress responses between intensively trained male adolescent volleyball players and age-matched sedentary controls. Twelve male volleyball players (16.5 [0.7] years of age) and sixteen healthy sedentary male volunteers (17.1 [0.6] years of age) participated in this study. Volleyball players were engaged in regular and year-round training. Unstimulated saliva samples were collected from volleyball players during the high-intensity training period and from the counterparts at the same timepoints after at least 18 hours of rest. Concentrations of salivary total protein, secretory immunoglobulin A (SIgA), cortisol, and lactoferrin were measured. Results of this study revealed that the SIgA concentrations and the ratio of SIgA/total protein in volleyball players were significantly lower compared with those in sedentary controls. However, the salivary cortisol concentrations and the ratio of cortisol/total protein in volleyball players were markedly higher compared with those in sedentary controls. No significant difference was observed in lactoferrin levels between volleyball players and sedentary controls. The findings of this study suggest that the prolonged intensive training may elicit a sustained stress and induce a suppressive effect on mucosal immunity in regularly and intensively trained adolescent athletes.

  10. Making OGC standards work - interoperability testing between meteorological web services

    Science.gov (United States)

    Siemen, Stephan; Little, Chris; Voidrot, Marie-Françoise

    2015-04-01

    The Meteorology and Oceanography Domain Working Group (Met Ocean DWG) is a community orientated working group of the Open Geospatial Consortium (OGC). The group does not directly revise OGC standards, but rather enables collaboration and communication between groups with meteorological and oceanographic interests. The Met Ocean DWG maintains a list of topics of interest to the meteorological and oceanographic communities for discussion, prioritises activities, defining feedback to the OGC Standards Working Groups (SWG), and performing interoperability experiments. One of the activities of the MetOcean DWG is the definition of Best Practices documents for common OGC standards, such as WMS and WCS. This is necessary since meteorological data has additional complexities in time, elevation and multi models runs including ensembles. To guarantee interoperability in practice it is important to test each other systems and ensure standards are implemented correctly, but also make recommendations to the DWG on the establishment of Best Practices guides. The European Working Group on Operational meteorological Workstations (EGOWS) was founded in 1990 as an informal forum for people working in the development field of operational meteorological workstations. The annual EGOWS meeting offers an excellent platform for exchanging information and furthering co-operation among the experts from NMS's, ECMWF and other institutes in the work with OGC standards. The presentation will give an update of the testing, which was being done during the June 2014 EGOWS meeting in Oslo and what has happen since. The presenter will also give an overview of the online resources to follow the tests and how interested parties can contribute to future interoperability tests.

  11. 20 CFR 404.1519k - Purchase of medical examinations, laboratory tests, and other services.

    Science.gov (United States)

    2010-04-01

    ... psychological examinations, X-rays and laboratory tests (including specialized tests, such as pulmonary function... tests, and other services. 404.1519k Section 404.1519k Employees' Benefits SOCIAL SECURITY... Standards for the Type of Referral and for Report Content § 404.1519k Purchase of medical examinations...

  12. 20 CFR 416.919k - Purchase of medical examinations, laboratory tests, and other services.

    Science.gov (United States)

    2010-04-01

    ... psychological examinations, X-rays and laboratory tests (including specialized tests, such as pulmonary function... tests, and other services. 416.919k Section 416.919k Employees' Benefits SOCIAL SECURITY ADMINISTRATION... for the Type of Referral and for Report Content § 416.919k Purchase of medical examinations...

  13. A comparison of take-off dynamics during three different spikes, block and counter-movement jump in female volleyball players.

    Science.gov (United States)

    Kabacinski, Jaroslae; Dworak, Lecholslaw B; Murawa, Michal; Ostarello, John; Rzepnicka, Agata; Maczynski, Jacek

    2016-12-01

    The purpose of the study was to compare the take-off dynamics in counter-movement jump (CMJ), volleyball block and spikes. Twelve professional female players, representing the highest volleyball league in Poland, participated in the laboratory tests. A force platform was used to record ground reaction force (GRF) during take-off phase in CMJ test, block from a run-up and spikes: front row attack, slide attack, back row attack. Vertical (v) GRF (peak: Rmax and integral mean: ), impulse of vGRF (J) and mechanical power (peak: Pmax and integral mean: ) were analyzed. Significant differences (P, J, Pmax, and ) were found between CMJ, block from a run-up and three different technique spikes. The highest values were recorded during take-off in the back row attack: peak vGRF (2.93±0.05 BW), integral mean vGRF (1.90±0.08 BW), impulse of vGRF (354±40 Ns), peak power (5320±918 W) and integral mean power (3604±683 W). Peak power (2608±217 W) and integral mean power (1417±94 W) were determined in CMJ test to evaluate the force-velocity capabilities of the players. In terms of GRF and the mechanical power, high level of dynamics in take-off influences positively the jumping height and significantly increases the effectiveness of attacks during spike of the ball over the block of the opponent.

  14. Research of in—service sipping test device

    Institute of Scientific and Technical Information of China (English)

    DengJun-Xian; XuYu-Ming; 等

    1998-01-01

    Sipping test device is used to identify the tightness of the irradiated fuel assembly during refuelling campaign.The gas is selected as the medium and the xenon-133 as the indicating nuclide,The device consists of the gas system,the γ-activity detection and measurement system,the power supply and signal system,the mechanical components and parts.The device has satisfactory functions,e.g.easy operation,indication in instrumentation,chart record and acoustic alarm,which can meet the operation demand of the nuclear reactor.

  15. Transformational leadership in nursing service. A test of theory.

    Science.gov (United States)

    McDaniel, C; Wolf, G A

    1992-02-01

    What are the leadership dimensions that result in low turnover or work satisfaction? Intellectual stimulation, charisma, and individual consideration constitute aspects of transformational leadership that are suggested to enhance retention and staff satisfaction. In this study, the authors tested transformational leadership theory in one nursing department with an executive, 11 midlevel administrators, and 77 staff registered nurses. Findings support the predictions. Composed of teachable components, transformational factors are similar to leadership qualities described in magnet hospitals, offering positive implications for nursing administration and professional nursing practice.

  16. Ecosytem Services: A Rapid Assessment Method Tested at 35 Sites of the LTER-Europe Network

    Directory of Open Access Journals (Sweden)

    Dick Jan

    2014-08-01

    Full Text Available The identification of parameters to monitor the ecosystem services delivered at a site is fundamental to the concept’s adoption as a useful policy instrument at local, national and international scales. In this paper we (i describe the process of developing a rapid comprehensive ecosystem service assessment methodology and (ii test the applicability of the protocol at 35 long-term research (LTER sites across 14 countries in the LTER-Europe network (www.lter-europe.net including marine, urban, agricultural, forest, desert and conservation sites. An assessment of probability of occurrence with estimated confidence score using 83 ecosystem service parameters was tested. The parameters were either specific services like food production or proxies such as human activities which were considered surrogates for cultural diversity and economic activity. This initial test of the ecosystem service parameter list revealed that the parameters tested were relatively easy to score by site managers with a high level of certainty (92% scored as either occurring or not occurring at the site with certainty of over 90%. Based on this assessment, we concluded that (i this approach to operationalise the concept of ecosystem services is practical and applicable by many sectors of civil society as a first screen of the ecosystem services present at a site, (ii this study has direct relevance to land management and policy decision makers as a transparent vehicle to focus testing scenarios and target data gathering, but (iii further work beyond the scale investigated here is required to ensure global applicability.

  17. Task-shifting HIV counselling and testing services in Zambia: the role of lay counsellors

    Directory of Open Access Journals (Sweden)

    Kapanda Paul

    2009-05-01

    Full Text Available Abstract Background The human resource shortage in Zambia is placing a heavy burden on the few health care workers available at health facilities. The Zambia Prevention, Care and Treatment Partnership began training and placing community volunteers as lay counsellors in order to complement the efforts of the health care workers in providing HIV counselling and testing services. These volunteers are trained using the standard national counselling and testing curriculum. This study was conducted to review the effectiveness of lay counsellors in addressing staff shortages and the provision of HIV counselling and testing services. Methods Quantitative and qualitative data were collected by means of semistructured interviews from all active lay counsellors in each of the facilities and a facility manager or counselling supervisor overseeing counseling and testing services and clients. At each of the 10 selected facilities, all counselling and testing record books for the month of May 2007 were examined and any recordkeeping errors were tallied by cadre. Qualitative data were collected through focus group discussions with health care workers at each facility. Results Lay counsellors provide counselling and testing services of quality and relieve the workload of overstretched health care workers. Facility managers recognize and appreciate the services provided by lay counsellors. Lay counsellors provide up to 70% of counselling and testing services at health facilities. The data review revealed lower error rates for lay counsellors, compared to health care workers, in completing the counselling and testing registers. Conclusion Community volunteers, with approved training and ongoing supervision, can play a major role at health facilities to provide counselling and testing services of quality, and relieve the burden on already overstretched health care workers.

  18. Nanning City Games 8 Gas Volleyball Finals In Setting up Man Using Technique Analysis%南宁市第八届运动会气排球男子总决赛中垫球技术运用分析

    Institute of Scientific and Technical Information of China (English)

    刘利鸿

    2013-01-01

    Through consulting a large number of data, The existing gas volleyball teaching and academic paper, Did not solve the problem:despite the current game of gas use volleyball digs a lot, Such as cushion ball, both hands hands baseball, "get" and "holding" technology, "Yin and Yang hand", one hand ball,"Torre put pad"technology and with hard row similar many technology, But the main scientific gas volleyball digs? What In the mat that gas volleyball teaching and training hard ball to its main content accurately. This paper will research the 8 th games gas volleyball match on the site to watch the finals of the game and video, literature, video analysis, mathematical statistics method, high level of nanning city gas volleyball match of mat ball technique application by analysis, it is concluded that the gas volleyball digs used in both hands mat ball primarily, by baseball, hands arm ball pad of services.%通过查阅大量资料,现有的气排球教材和学术论文中,都没有解决这个问题:尽管目前比赛中使用的气排球垫球技术很多,如双手垫球、双手捧球、“捞”和“捧”技术、“阴阳手”、单手垫球、“插托”等技术以及与硬排相似的很多技术,但主要的科学的气排球垫球技术是什么?以至于在气排球的垫球教学和训练中难以对其主要内容准确把握。本文将通过对南宁市第八届运动会气排球比赛进行现场观看,并对比赛决赛进行录像,运用文献资料、录像解析、数理统计等方法,对南宁市高水平气排球比赛中垫球技术运用情况进行分析,得出:本次气排球垫球技术中采用以双手垫球为主,以双手捧球、单臂垫球为辅。

  19. Celiac Disease in an Elite Female Collegiate Volleyball Athlete: A Case Report

    Science.gov (United States)

    Eberman, Lindsey E; Cleary, Michelle A

    2005-01-01

    Objective: To present the case of an elite female volleyball player who complained of diarrhea and fatigue after preseason training. Background: The athlete lost 8.1 kg during the first 20 days of training, and we initially suspected an eating disorder. The sports medicine team interviewed the athlete and found she did not have psychological symptoms indicative of an eating disorder. The results of routine blood tests revealed critically high platelet counts; in conjunction with the physical findings, the athlete was referred to a gastroenterologist. Differential Diagnosis: Our initial suggestion was an eating disorder. Therefore, the differential diagnosis included anorexia athletica, anorexia nervosa, and bulimia nervosa. On referral, the differential diagnosis was anemia, gastrointestinal dysfunction, lymphoma, or bowel adenocarcinoma. Diarrhea, weight loss, and blood test results were suggestive of active celiac disease, and a duodenal biopsy specimen confirmed this diagnosis. Treatment: The athlete was treated with a gluten-free diet, which excludes wheat, barley, and rye. Dietary substitutions were incorporated to maintain adequate caloric intake. Uniqueness: The presence of active celiac disease may not be uncommon. However, elite athletes who face celiac disease present a new challenge for the athletic trainer. The athletic trainer can help guide the athlete in coping with the lifestyle changes associated with a gluten-free diet. Conclusions: One in every 200 to 400 individuals has celiac disease; many of these individuals are asymptomatic and, therefore, their conditions are undiagnosed. Undiagnosed, untreated celiac disease and patients who fail to follow the gluten-free diet increase the risk of further problems. PMID:16404459

  20. Evaluating the Components of Marketing Mix (7Ps of Iran’s Volleyball Super League

    Directory of Open Access Journals (Sweden)

    Siavash Khodaparast Sareshkeh

    2016-10-01

    Full Text Available The aim of this study is to evaluate the sport marketing mix and its seven elements (product, price, promotion, place, public relations, people, and physical evidence in Iran’s volleyball super league from the viewpoint of ministry of sport and volleyball federation managers in two conditions, namely existing and optimal. For this purpose, 102 subjects, among them the official staffs in the ministry of youth and sport up to general managers and volleyball federation’s officials up to the managers of the sub-divisions, filled in the researchers’ constructed questionnaire with an appropriate validity and internal reliability of 91% (Cronbach alfa. Based on the findings taken from the viewpoints of the staffs in the ministry of youth and sport up to general managers, and volleyball federation’s officials up to the managers of the divisions, CEOs, leaders, coaches and academics, it has been found that in the existing condition, the component of product enjoyed the highest mean. Other components including price, physical evidence, public relations, promotion, and distribution had lower means (in order mentioned. In the optimal condition, the public relations variable had the highest mean, and other components had lower means. However, there was a statistically significant difference between the two existing and mix optimal conditions and their 7 components such that according to the rank means, the existing condition had a lower score compared to the optimal one. This means that in the existing condition, less attention has been paid to the mix elements.

  1. THE MODEL CHARACTERISTICS OF JUMP ACTIONS STRUCTURE OF HIGH PERFORMANCE FEMALE VOLLEYBALL PLAYERS

    Directory of Open Access Journals (Sweden)

    Stech M.

    2012-12-01

    Full Text Available The purpose of this study was to develop generalized and individual models of the jump actions of skilled female volleyball players. The main prerequisite for the development of the jump actions models were the results of our earlier studies of factor structure of jump actions of 10 sportswomen of the Polish volleyball team "Gedania" (Premier League in the preparatory and competitive periods of the annual cycle of preparation. The athletes age was 22.0 +- 2.9 years, the sports experience - 8.1 +- 3.1 years, body height - 181.9 +- 8.4 years and body weight - 72.8 +- 10.8 kg. Mathematical and statistical processing of the data (the definition of M ± SD and significant differences between the samples was performed using a standard computer program "STATISTICA 7,0". Based on the analysis of the factor structure of 20 jump actions of skilled women volleyball players determined to within 5 of the most informative indexes and their tentative values recommended for the formation of a generalized model of this structure. Comparison of individual models of jump actions of skilled women volleyball players with their generalized models in different periods of preparation can be used for the rational choice of means and methods for the increasing of the training process efficiency.

  2. Exploring Changes to a Teacher's Teaching Practices and Student Learning through a Volleyball Content Knowledge Workshop

    Science.gov (United States)

    Kim, Insook

    2016-01-01

    This paper describes how improving a teacher's content knowledge changes his teaching practices and its subsequent effects on student learning during a middle school volleyball instructional unit. The study was designed to challenge teacher educators' thinking about the importance of in-depth content knowledge for effective teaching by…

  3. Role of Uniforms in the Body Image of Female College Volleyball Players

    Science.gov (United States)

    Steinfeldt, Jesse A.; Zakrajsek, Rebecca A.; Bodey, Kimberly J.; Middendorf, Katharine G.; Martin, Scott B.

    2013-01-01

    Female student athletes often desire a muscular body to be successful in sport, but this body type does not conform to traditional cultural norms of femininity. In this study, the authors qualitatively examined the experiences of female intercollegiate volleyball players to better understand their beliefs about their bodies--both as athletes and…

  4. Comparison of Three Instructional Approaches to Enhance Tactical Knowledge in Volleyball among University Students

    Science.gov (United States)

    Vande Broek, Gert; Boen, Filip; Claessens, Manu; Feys, Jos; Ceux, Tanja

    2011-01-01

    This study investigated the decision-making process of three instructional groups (i.e., teacher-centered, student-centered with tactical questioning and student-centered without tactical questioning) in practical courses in volleyball among university students. All students (N = 122) performed a Tactical Awareness task on the correctness of the…

  5. The Effect of Movement Imagery Training on Learning Forearm Pass in Volleyball

    Science.gov (United States)

    Ay, Khitam Mousa; Halaweh, Rami Saleh; Al-Taieb, Mohammad Abu

    2013-01-01

    This study investigates the effect of movement imagery on learning the forearm pass in volleyball. Twenty four mail students from Physical Education Factuly at Jordan University (19 ± 0.5) years of age. After Completed the Movement Imagery Questionnaire-Revised (MIQ-R; Hall & Martin, 1997) the subjects randomly divided into two groups,…

  6. Comparison of Total Antioxidant Capacity Oxidative Stress and Blood Lipoprotein Parameters in Volleyball Players and Sedentary

    Science.gov (United States)

    Gokhan, Ismail

    2013-01-01

    This study aims to measure, then compare sedentary blood lipoproteins, oxidant- antioxidant state and oxidative stress index in volleyball players. The experimental group of the research consists of regularly practising 20 boys between the ages of 12 and 17, and the control group comprises 32 children practising no particular sports branch, 12 of…

  7. Different temporal bases for body and arm movements in volleyball serve reception

    NARCIS (Netherlands)

    Benerink, N. H.; Bootsma, R. J.; Zaal, F. T. J. M.

    2015-01-01

    In many sports, successfully intercepting a ball requires players to move both their body and their arms. Yet, studies of interception typically focus on one or the other. We performed an analysis of the moments of first foot and arm movements of elite-level volleyball players during serve

  8. Spike the PCHA! Overuse injury of the Posterior Circumflex Humeral Artery in elite volleyball

    NARCIS (Netherlands)

    van de Pol, D.

    2016-01-01

    In 1993, professor Reekers of the Academic Medical Center (AMC) Radiology department was the first to describe a traumatic aneurysm of the posterior circumflex humeral artery (PCHA) in a volleyball player, suggesting a causal relationship. Fifteen years later, between 2008 and 2010, several elite

  9. Effects of Classwide Peer Tutoring on the Performance of Sixth Grade Students during a Volleyball Unit

    Science.gov (United States)

    Ayvazo, Shiri; Ward, Phillip

    2009-01-01

    This investigation examined the effects of Classwide Peer Tutoring (CWPT), a variation of peer tutoring on the volleyball skills of four 6th grade middle school students purposefully selected from an intact class of 21 students. Participants were average to low skilled males and females. A single subject A-B-A-B withdrawal design was used to…

  10. Cohesion and Trauma: An Examination of a Collegiate Women's Volleyball Team

    Science.gov (United States)

    Fletcher, Teresa B.; Meyer, Barbara B.

    2009-01-01

    This study examined the effects of Adventure Based Counseling (i.e., a low-element challenge program) on the cohesion of a collegiate women's volleyball team. Results suggest postintervention improvements in team cohesion. The support created in the challenge experience also transferred to the players helping one another to grieve the untimely…

  11. Overuse in volleyball training/practice: A review on shoulder and spine-related injuries.

    Science.gov (United States)

    Seminati, Elena; Minetti, Alberto Enrico

    2013-01-01

    Overuse injuries are predominant in sports involving the repetition of similar movements patterns, such as in volleyball or beach volleyball, and they may represent as much a problem as do acute injuries. This review discusses the prevalence of two of the most common overuse-related injuries in volleyball: shoulder and back/spine injuries. Risk factors and the aetiology of these injuries are illustrated in order to make possible to initiate preventive programme or post-injuries solutions. Data collected from literature showed a moderately higher injury rate for overuse shoulder injuries compared to the back/spine (19.0 ± 11.2% and 16.8 ± 9.7%, respectively). These data could be underestimated, and future epidemiological studies should consider overuse injuries separately from the others, with new methodological approaches. In addition to age, biomechanical and anatomical features of a volleyball technique utilised in game and the amount of hours played are considered as the main risk factors for overuse upper limb injuries, both for professional and recreational athletes. Together with post-injuries solutions, great importance has to be placed on preventive programmes, such as preventive rehabilitation, stretching, adequate warm up, strength-power exercises, etc. Furthermore, it is particularly suggested that coaches and players work together in order to develop new game/training techniques that minimise stresses and range of motion of the principal anatomical structures involved, while maintaining athletes performance.

  12. Shoulder pain among high-level volleyball players and preseason features.

    Science.gov (United States)

    Forthomme, Benedicte; Wieczorek, Valerie; Frisch, Anne; Crielaard, Jean-Michel; Croisier, Jean-Louis

    2013-10-01

    The main goal of this prospective study was to identify the most significant intrinsic risk factors for shoulder pain by measuring strength developed by shoulder rotators and by carrying out various morphostatic assessments. Sixty-six players (mean ± SD age = 24 ± 5 yr) were recruited from nine volleyball teams from the first and second divisions (34 men and 32 women) to participate in the study. Before the start of the volleyball season, all the participants completed a preseason questionnaire and underwent both a bilateral isokinetic evaluation of the shoulders and morphostatic measurements. During the subsequent 6 months of the competition period, the players reported through a weekly questionnaire any shoulder pain experienced. During the ongoing season, 23% (15 of 66 players) of the volleyball players experienced dominant shoulder pain. Interestingly, participants who reported a history of dominant shoulder pain were found to have nine times higher risk of suffering further pain in their dominant shoulder. The eccentric maximal strength developed by the internal and external rotators was found to represent a protective factor in the volleyball players (respective odds ratios = 0.946, P = 0.01 and 0.94, P = 0.05). No risk factors were found among the shoulder morphostatic measurements. In our study, the evaluation of shoulder rotator muscle strength through isokinetic assessment, especially eccentric mode, appeared to be the most contributing parameter to identify risk factors for shoulder pain. This evaluation should allow to better identify players at risk.

  13. Preventing musculoskeletal injuries among recreational adult volleyball players : design of a randomised prospective controlled trial

    NARCIS (Netherlands)

    Gouttebarge, Vincent; Zwerver, Johannes; Verhagen, Evert

    2017-01-01

    BACKGROUND: Both acute and overuse injuries are common among recreational volleyball players, especially finger/wrist, ankle, shoulder and knee injuries. Consequently, an intervention ('VolleyVeilig') was developed to prevent or reduce the occurrence of finger/wrist, shoulder, knee and ankle

  14. Management of Sport Injuries with Korean Medicine: A Survey of Korean National Volleyball Team

    Directory of Open Access Journals (Sweden)

    Changsop Yang

    2016-01-01

    Full Text Available The purpose of this study was to report the current state of Korean medicine (KM treatment on sports injury by implementing survey with volleyball team medical doctors participating in 2013-2014 season. Six KM doctors completed a questionnaire that includes injury parameters: type, location, situation, and pain scores. We collected 166 injury cases from 94 Korean male and female national volleyball players. Knee (25.9%, low back (13.3%, elbow, and ankle (8.4% injuries were most common. Joint (41.6% and muscle (30.7% were major injured tissues. KM team medical doctors utilized acupuncture (40.4%, chuna manual therapy (16.0%, physical therapy (15.2%, taping (9.0%, and cupping (7.8% to treat volleyball injuries. Any types of medications were used infrequently. Additional physical and exercise therapy were preferred after receiving acupuncture (both 46.9%. This study presented the preliminary injury profile of Korean elite volleyball players. Injury and treatment parameters could be useful to build advanced KM model in sport medicine.

  15. Role of Uniforms in the Body Image of Female College Volleyball Players

    Science.gov (United States)

    Steinfeldt, Jesse A.; Zakrajsek, Rebecca A.; Bodey, Kimberly J.; Middendorf, Katharine G.; Martin, Scott B.

    2013-01-01

    Female student athletes often desire a muscular body to be successful in sport, but this body type does not conform to traditional cultural norms of femininity. In this study, the authors qualitatively examined the experiences of female intercollegiate volleyball players to better understand their beliefs about their bodies--both as athletes and…

  16. Comparison of Three Instructional Approaches to Enhance Tactical Knowledge in Volleyball among University Students

    Science.gov (United States)

    Vande Broek, Gert; Boen, Filip; Claessens, Manu; Feys, Jos; Ceux, Tanja

    2011-01-01

    This study investigated the decision-making process of three instructional groups (i.e., teacher-centered, student-centered with tactical questioning and student-centered without tactical questioning) in practical courses in volleyball among university students. All students (N = 122) performed a Tactical Awareness task on the correctness of the…

  17. [Injured players candidates for professional volleyball team: sign them up or not?].

    Science.gov (United States)

    Tsur, Atzmon

    2012-02-01

    Competitive volleyball teams master six basic skills: serve, pass, set, attack, block and dig. Each of these skills comprises a number of specific techniques, considered standard practice in high-level volleyball. Five professional volleyball players were candidates to join a first division team in Israel. Their medical dossier presented previous injuries that occurred during their sport's activity. Two of the players had a suprascapular nerve injury, one had a lesion in the hamstrings, another one had an operated ankle sprain and the fifth one had an operated anterior cruciate ligament (ACL) tear in both knees and a mallet fifth finger. The team physician had to make the decision as to whether they are able to continue playing volleyball at a high level, taking into consideration the different skills necessary in this sport. Players having suprascapular nerve injury might have difficulties to hit the serve, to hit and to block the ball. Those with unstable knee or ankle take a risk white landing. Lesions in the hamstrings cause local pain during jumping to attack or to block the ball and a mallet finger will disturb the player when attempting to set the ball, to handle it in attack or to block.

  18. Spike the PCHA! Overuse injury of the Posterior Circumflex Humeral Artery in elite volleyball

    NARCIS (Netherlands)

    van de Pol, D.

    2016-01-01

    In 1993, professor Reekers of the Academic Medical Center (AMC) Radiology department was the first to describe a traumatic aneurysm of the posterior circumflex humeral artery (PCHA) in a volleyball player, suggesting a causal relationship. Fifteen years later, between 2008 and 2010, several elite ma

  19. Cohesion and Trauma: An Examination of a Collegiate Women's Volleyball Team

    Science.gov (United States)

    Fletcher, Teresa B.; Meyer, Barbara B.

    2009-01-01

    This study examined the effects of Adventure Based Counseling (i.e., a low-element challenge program) on the cohesion of a collegiate women's volleyball team. Results suggest postintervention improvements in team cohesion. The support created in the challenge experience also transferred to the players helping one another to grieve the untimely…

  20. Effects of Classwide Peer Tutoring on the Performance of Sixth Grade Students during a Volleyball Unit

    Science.gov (United States)

    Ayvazo, Shiri; Ward, Phillip

    2009-01-01

    This investigation examined the effects of Classwide Peer Tutoring (CWPT), a variation of peer tutoring on the volleyball skills of four 6th grade middle school students purposefully selected from an intact class of 21 students. Participants were average to low skilled males and females. A single subject A-B-A-B withdrawal design was used to…

  1. Comparison of Total Antioxidant Capacity Oxidative Stress and Blood Lipoprotein Parameters in Volleyball Players and Sedentary

    Science.gov (United States)

    Gokhan, Ismail

    2013-01-01

    This study aims to measure, then compare sedentary blood lipoproteins, oxidant- antioxidant state and oxidative stress index in volleyball players. The experimental group of the research consists of regularly practising 20 boys between the ages of 12 and 17, and the control group comprises 32 children practising no particular sports branch, 12 of…

  2. Exploring Changes to a Teacher's Teaching Practices and Student Learning through a Volleyball Content Knowledge Workshop

    Science.gov (United States)

    Kim, Insook

    2016-01-01

    This paper describes how improving a teacher's content knowledge changes his teaching practices and its subsequent effects on student learning during a middle school volleyball instructional unit. The study was designed to challenge teacher educators' thinking about the importance of in-depth content knowledge for effective teaching by…

  3. The Effect of Movement Imagery Training on Learning Forearm Pass in Volleyball

    Science.gov (United States)

    Ay, Khitam Mousa; Halaweh, Rami Saleh; Al-Taieb, Mohammad Abu

    2013-01-01

    This study investigates the effect of movement imagery on learning the forearm pass in volleyball. Twenty four mail students from Physical Education Factuly at Jordan University (19 ± 0.5) years of age. After Completed the Movement Imagery Questionnaire-Revised (MIQ-R; Hall & Martin, 1997) the subjects randomly divided into two groups,…

  4. [Analysis of knee joint injuries of competitive volleyball players in selected sports clubs of Poznan city--biomechanical context. Synthesis--proposal for the usage of physiotherapy methods in the prevention of the discussed injuries].

    Science.gov (United States)

    Dworak, Lechosław B; Rzepnicka, Agata; Wilkosz, Piotr; Szczesny, Łukasz

    2010-01-01

    Volleyball is a source of direct injuries and chronic overloads of the joints, which indirectly results in traumas and permanent dysfunctions. This applies particularly to: knee joints, ankle joints, shoulder joints and small joints of the hand, as well as the joints of the lower spine regions. Each league team should employ a physiotherapist who would be responsible for the implementation of an injury prevention program as well as for choosing the right training loads. The purpose of this study is to analyze the frequency and the type of knee joint injuries occurring in people practicing Volleyball at competitive level as well as to propose the usage of elements of modern physiotherapy in order to prevent these injuries. The tests were performed over a group of 19 volleyball players from Poznan. In order to propose measures that would prevent injuries, the authors carried out a review of modern physiotherapy methods and suggested the implementation of certain therapeutic techniques for the region of the knee joint. RESULT ANALYSIS AND DISCUSSION: As much as 79% of the subjects reported having chronic pain and knee joint injuries in the past. All of them, due to their conditions, declared having used various forms of physiotherapy treatment. It seems that in a professional sports club not only the presence of a massage therapist but first of all a qualified physiotherapist is indispensable.

  5. Postural status of female volleyball players aged 12 to 16 years

    Directory of Open Access Journals (Sweden)

    Đurić Saša

    2015-01-01

    Full Text Available During the period of children's development there are morphological, motor, physiological and psychological transformations, which may alter posture and natural forms of the human body on a temporary or permanent way. Many studies and systematic reviews indicate that there are a growing number of school children with impaired body state. Studies indicate the fact that many sports which include a lot of high torque and asymmetrical muscle involvements, are a precondition for the asymmetry of the spinal column. Also, some research has shown that girls are more susceptible to deviation of the spinal column than boys. The goal of this study was to detect the postural status female volleyball players of V.C. 'Eaton Srem Tempo' from Sremska Mitrovica. Subjects were 72 female volleyball players aged 12 to 16 years. The methods that are used to detect possible postural disorder are both clinical and plantography method whose results were interpreted with Thomsen's method. According to the results of the studies, it was concluded that there is improper posture status of a 68% female volleyball players (clinical method, while the irregular status of the foot has 58% of female volleyball players (plantography method. The most common physical irregularities were observed: knee joint hyperextension (34.72%, followed by unequal Lorenz's triangles or triangles stature (26.39%, and abnormal position of the shoulder (25% of subjects. We performed a correlational analysis between the values of body mass index and the drooping of the left and right foot index. The obtained values of correlation coefficients were 0.055 for the left and 0.083 for the right foot. Due to the nature of the results, the implementation of preventive and corrective measures is essential. Certain sports can be very effective for that, and there are discussions of various authors that it can be volleyball. Their application should be adapted to gender, age, physical status, current physical

  6. Reaching disenfranchised youth and mobile populations in Ghana through voluntary counselling and testing services for HIV.

    Science.gov (United States)

    Wyss, Susi; Ablordeppey, Joyce; Okrah, Jane; Kyei, Abigail

    2007-08-01

    This paper documents the evaluation of a 20-month project to provide voluntary counselling and testing (VCT) to a mobile population of youth surrounding the Agbogbloshie market in Accra, Ghana. The specific objectives of the evaluation were to determine: 1) to what extent targets for providing VCT services to the specified population were reached; 2) how HIV prevalence among clients compared to that of the general population; 3) to what extent former clients self-reported behaviour change; and 4) whether useful lessons could be drawn regarding fees, hours, and location of services, as well as use of peer educators to increase use of VCT services among the target population. Various methodologies, including questionnaires, focus group discussions, a review of the service statistics and an exit poll of clients were used to evaluate the project. The service statistics demonstrated that the project exceeded the life-of-project target for number of clients by nearly 40%. Prevalence for the VCT client population (aged 15-25) was higher than for the general population (aged 15-24), although the gender differentials were similar. Focus group data suggested that clients may have adopted behaviour changes as a result of VCT. Finally, focus group discussions and VCT service trends showed that the high number of clients was largely influenced by three factors: services being free, location and hours of services being convenient to the target population, and use of peer educators to promote the services. In addition, the evaluation highlighted the importance of the counselling component of VCT, even as counselling can get short-changed at the expense of HIV testing when large numbers of clients are involved. The evaluation stressed the need to appropriately remunerate peer educators for their work whenever possible. Finally, VCT programmes continue to face challenges such as: HIV stigma as a barrier to people coming to be counselled and tested; insufficient availability of

  7. Sports education professional consciousness of volleyball training%体育教育专业学生排球意识的培养

    Institute of Scientific and Technical Information of China (English)

    石勋

    2011-01-01

    排球意识是掌握排球技术、战术的关键,排球意识的高低直接影响到技、战术运用的效果.针对体育教育专业学生排球学习、教学与训练的现状及存在问题,提出学生排球意识培养的方法和建议,以提高排球教学和训练的质量.%Volleyball consciousness is master volleyball technical and tactical key, volleyball consciousness directly training affect the skill and tactics of volleyball the current students' volleyball consciousness, using effect. Aiming at the sports education students learning, teaching and situation and existing problems, this paper puts forward the cultivation of methods and Suggestions in order to improve the quality of teaching and the training of volleyball.

  8. HIV and family planning service integration and voluntary HIV counselling and testing client composition in Ethiopia.

    Science.gov (United States)

    Bradley, H; Bedada, A; Tsui, A; Brahmbhatt, H; Gillespie, D; Kidanu, A

    2008-01-01

    Integrating voluntary HIV counselling and testing (VCT) with family planning and other reproductive health services may be one effective strategy for expanding VCT service delivery in resource poor settings. Using 30,257 VCT client records with linked facility characteristics from Ethiopian non-governmental, non-profit, reproductive health clinics, we constructed multi-level logistic regression models to examine associations between HIV and family planning service integration modality and three outcomes: VCT client composition, client-initiated HIV testing and client HIV status. Associations between facility HIV and family planning integration level and the likelihood of VCT clients being atypical family planning client-types, versus older (at least 25 years old), ever-married women were assessed. Relative to facilities co-locating services in the same compound, those offering family planning and HIV services in the same rooms were 2-13 times more likely to serve atypical family planning client-types than older, ever-married women. Facilities where counsellors jointly offered HIV and family planning services and served many repeat family planning clients were significantly less likely to serve single clients relative to older, married women. Younger, single men and older, married women were most likely to self-initiate HIV testing (78.2 and 80.6% respectively), while the highest HIV prevalence was seen among older, married men and women (20.5 and 34.2% respectively). Compared with facilities offering co-located services, those integrating services at room- and counsellor-levels were 1.9-7.2 times more likely to serve clients initiating HIV testing. These health facilities attract both standard material and child health (MCH) clients, who are at high risk for HIV in these data, and young, single people to VCT. This analysis suggests that client types may be differentially attracted to these facilities depending on service integration modality and other facility

  9. Dynamic load indicators for take-off-landing sequence in blocks and attacks of elite female volleyball players

    National Research Council Canada - National Science Library

    Kabaciński, Jarosław; Dworak, Lechosław Bogdan; Murawa, Michał; Rzepnicka, Agata

    2016-01-01

    Dynamic loads during landings determined by the ground reaction forces (GRFs) may elaborate internal loads and increase the risk of overload knee injuries as a result of performing volleyball jumps many times...

  10. Sport’s selection of volley-ball players: morphological and pedagogical criteria of definition of movement endowments: (information 1

    Directory of Open Access Journals (Sweden)

    Leonid Serhiyenko

    2016-02-01

    Full Text Available Purpose: to define methodology of initial sports selection of young volley-ball players. Material & Methods: methods of theoretical analysis and generalization, bibliographic method of search and study of scientific information, a systematic analysis are turned to account in this work. Results: the article deals with the theoretical model of the mast important factors, which define sports endowments of volley-ball players. It is shown the point estimation of body structure and composition, motor and psychomotor abilities, dynamic possibilities, psychophisiological indices in the prognosis of volley-ball players gifted for high sports results. Conclusions: criteria of high movement endowments of volley-ball players are defined; norms of estimation of motor abilities of valley-ball players on the initial steps of sports selection are given.

  11. 49 CFR 40.341 - Must service agents comply with DOT drug and alcohol testing requirements?

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 1 2010-10-01 2010-10-01 false Must service agents comply with DOT drug and alcohol testing requirements? 40.341 Section 40.341 Transportation Office of the Secretary of Transportation PROCEDURES FOR TRANSPORTATION WORKPLACE DRUG AND ALCOHOL TESTING PROGRAMS Roles and...

  12. 7 CFR 91.37 - Standard hourly fee rate for laboratory testing, analysis, and other services.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Standard hourly fee rate for laboratory testing... Charges § 91.37 Standard hourly fee rate for laboratory testing, analysis, and other services. (a) The standard hourly fee rate in this section for the individual laboratory analyses cover the costs of...

  13. Online testing of service-oriented architectures to detect state-based faults

    NARCIS (Netherlands)

    Greiler, M.S.

    2009-01-01

    Service-oriented architectures have found their way into industry to enable better business-to-business cooperations. With this software architecture new challenges for software development and testing appeared. In this proposal we discuss the problem of testing these complex, and distributed

  14. Distributed, Cross-Platform, and Regression Testing Architecture for Service-Oriented Architecture

    CERN Document Server

    Bassil, Youssef

    2012-01-01

    As per leading IT experts, today's large enterprises are going through business transformations. They are adopting service-based IT models such as SOA to develop their enterprise information systems and applications. In fact, SOA is an integration of loosely-coupled interoperable components, possibly built using heterogeneous software technologies and hardware platforms. As a result, traditional testing architectures are no more adequate for verifying and validating the quality of SOA systems and whether they are operating to specifications. This paper first discusses the various state-of-the-art methods for testing SOA applications, and then it proposes a novel automated, distributed, cross-platform, and regression testing architecture for SOA systems. The proposed testing architecture consists of several testing units which include test engine, test code generator, test case generator, test executer, and test monitor units. Experiments conducted showed that the proposed testing architecture managed to use p...

  15. Chinese Women's Volleyball Team and World Women's Volleyball Team four Times Tactical Offensive Comparative Study%中国与世界女排强队四攻战术效果对比研究

    Institute of Scientific and Technical Information of China (English)

    许瑞勋; 王贺振

    2011-01-01

    This article analysis in seven game video in 2009 and 2010 world women's volleyball grand prix finals of which the Chinese women's volleyball team participate in. The research masters Master Chinese women's volleyball team and world women's volleyball teams generally tactical effect application situation through four offensive system and contrast between them the game data in order to identify Chinese women's volleyball team and world women's volleyball team strength gap.%通过对2009年、2010年世界女排大奖赛总决赛中国女排参与的7场比赛录像分析,从一攻、防反、保攻和推攻4个系统收集整理中国女排和世界女排强队总的技战术运用情况,并对其有关的比赛数据进行研究分析,旨在对比中国女排与世界女排强队之间的技战术实力,寻求解决问题的途径.

  16. Physical and Temporal Characteristics of Under 19, Under 21 and Senior Male Beach Volleyball Players

    Directory of Open Access Journals (Sweden)

    Alexandre Medeiros, Rui Marcelino, Isabel Mesquita, José Manuel Palao

    2014-09-01

    Full Text Available This study aimed to assess the effects of age groups and players’ role (blocker vs. defender specialist in beach volleyball in relation to physical and temporal variables, considering quality of opposition. 1101 rallies from Under 19 (U19, 933 rallies from Under 21 (U21, and 1480 rallies from senior (senior (Men’s Swatch World Championships, 2010-2011 were observed using video match analysis. Cluster analysis was used to set teams’ competitive levels and establish quality of opposition as “balanced”, “moderate balanced” and “unbalanced” games. The analyzed variables were: temporal (duration of set, total rest time, total work time, duration of rallies, rest time between rallies and physical (number of jumps and number of hits done by defenders and blockers characteristics. A one-way ANOVA, independent samples t-test and multinomial logistic regression were performed to analyze the variables studied. The analysis of temporal and physical characteristics showed differences considering age group, player’s role and quality of opposition. The duration of set, total rest time, and number of jumps done by defenders significantly increased from the U19 to senior category. Multinomial logistic regression showed that in: a balanced games, rest time between rallies was higher in seniors than in U19 or U21; number of jumps done by defenders was higher in seniors than in U19 and U21; b moderate balanced games, number of jumps done by defenders was higher in seniors than in U21 and number of jumps done by blockers was smaller in U19 than U21 or seniors; c unbalanced games, no significant findings were shown. This study suggests differences in players’ performances according to age group and players’ role in different qualities of opposition. The article provides reference values that can be useful to guide training and create scenarios that resemble a competition, taking into account physical and temporal characteristics.

  17. Knowledge and use of HIV counseling and testing services among young persons in Ibadan, Nigeria.

    Science.gov (United States)

    Ajuwon, Ademola J; Titiloye, Musibau; Oshiname, Frederick; Oyewole, Oyediran

    AIDS is a major public health problem in Nigeria. HIV counseling and testing (HCT) service is an important component of prevention and control programs. Little information is available about young persons' knowledge and use of HCT services in Nigeria. This study assessed knowledge of HIV/AIDS and use of HCT services among secondary school students and apprentices in Ibadan, Nigeria. Data were collected through 16 focus group discussions (FGD) and administration of a 36-item questionnaire to 1,281 randomly selected male and female secondary school students and apprentices aged 15-25 years. The respondents consisted of 54% apprentices and 46% students. Although virtually all respondents were aware of AIDS, only 15.8% of the sample had heard about HCT. Of those who were aware of HCT, 30.1% knew where to access the service. Students had superior knowledge of HCT than apprentices. Only 7% of those aware of HCT had ever taken the test. The percentage of those who had reportedly taken the test ranged from 11.3% of female apprentices to 6.3% of male students, 5.3% of female students, and 5.2% of male apprentices. The barriers identified by FGD participants to use of HCT services are fear of stigmatization, perceived exorbitant cost of testing, lack of knowledge of where HCT service are available, and belief that HCT is meant for only sexually active persons. However, 82.6% of the entire sample expressed the willingness to take HCT if it is provided free of charge, and there is a guarantee of confidentiality of results. Young persons have limited knowledge of HCT and under-utilize this service. Establishment of new HCT centers, promotion activities using the media, and peer education are recommended to increase uptake of this service among young persons in Nigeria.

  18. Expenditure Analysis of HIV Testing and Counseling Services Using the Cascade Framework in Vietnam.

    Directory of Open Access Journals (Sweden)

    Van Thu Nguyen

    Full Text Available Currently, HIV testing and counseling (HTC services in Vietnam are primarily funded by international sources. However, international funders are now planning to withdraw their support and the Government of Vietnam (GVN is seeking to identify domestic funding and generate client fees to continue services. A clear understanding of the cost to sustain current HTC services is becoming increasingly important to facilitate planning that can lead to making HTC and other HIV services more affordable and sustainable in Vietnam. The objectives of this analysis were to provide a snapshot of current program costs to achieve key program outcomes including 1 testing and identifying PLHIV unaware of their HIV status and 2 successfully enrolling HIV (+ clients in care.We reviewed expenditure data reported by 34 HTC sites in nine Vietnamese provinces over a one-year period from October 2012 to September 2013. Data on program outcomes were extracted from the HTC database of 42,390 client records. Analysis was carried out from the service providers' perspective.The mean expenditure for a single client provided HTC services (testing, receiving results and referral for care/treatment was US $7.6. The unit expenditure per PLHIV identified through these services varied widely from US $22.8 to $741.5 (median: $131.8. Excluding repeat tests, the range for expenditure to newly diagnose a PLHIV was even wider (from US $30.8 to $1483.0. The mean expenditure for one successfully referred HIV client to care services was US $466.6. Personnel costs contributed most to the total cost.Our analysis found a wide range of expenditures by site for achieving the same outcomes. Re-designing systems to provide services at the lowest feasible cost is essential to making HIV services more affordable and treatment for prevention programs feasible in Vietnam. The analysis also found that understanding the determinants and reasons for variance in service costs by site is an important

  19. Evaluating ecosystem services provided by non-native species: an experimental test in California grasslands.

    Directory of Open Access Journals (Sweden)

    Claudia Stein

    Full Text Available The concept of ecosystem services--the benefits that nature provides to human's society--has gained increasing attention over the past decade. Increasing global abiotic and biotic change, including species invasions, is threatening the secure delivery of these ecosystem services. Efficient evaluation methods of ecosystem services are urgently needed to improve our ability to determine management strategies and restoration goals in face of these new emerging ecosystems. Considering a range of multiple ecosystem functions may be a useful way to determine such strategies. We tested this framework experimentally in California grasslands, where large shifts in species composition have occurred since the late 1700's. We compared a suite of ecosystem functions within one historic native and two non-native species assemblages under different grazing intensities to address how different species assemblages vary in provisioning, regulatory and supporting ecosystem services. Forage production was reduced in one non-native assemblage (medusahead. Cultural ecosystem services, such as native species diversity, were inherently lower in both non-native assemblages, whereas most other services were maintained across grazing intensities. All systems provided similar ecosystem services under the highest grazing intensity treatment, which simulated unsustainable grazing intensity. We suggest that applying a more comprehensive ecosystem framework that considers multiple ecosystem services to evaluate new emerging ecosystems is a valuable tool to determine management goals and how to intervene in a changing ecosystem.

  20. Evaluating ecosystem services provided by non-native species: an experimental test in California grasslands.

    Science.gov (United States)

    Stein, Claudia; Hallett, Lauren M; Harpole, W Stanley; Suding, Katharine N

    2014-01-01

    The concept of ecosystem services--the benefits that nature provides to human's society--has gained increasing attention over the past decade. Increasing global abiotic and biotic change, including species invasions, is threatening the secure delivery of these ecosystem services. Efficient evaluation methods of ecosystem services are urgently needed to improve our ability to determine management strategies and restoration goals in face of these new emerging ecosystems. Considering a range of multiple ecosystem functions may be a useful way to determine such strategies. We tested this framework experimentally in California grasslands, where large shifts in species composition have occurred since the late 1700's. We compared a suite of ecosystem functions within one historic native and two non-native species assemblages under different grazing intensities to address how different species assemblages vary in provisioning, regulatory and supporting ecosystem services. Forage production was reduced in one non-native assemblage (medusahead). Cultural ecosystem services, such as native species diversity, were inherently lower in both non-native assemblages, whereas most other services were maintained across grazing intensities. All systems provided similar ecosystem services under the highest grazing intensity treatment, which simulated unsustainable grazing intensity. We suggest that applying a more comprehensive ecosystem framework that considers multiple ecosystem services to evaluate new emerging ecosystems is a valuable tool to determine management goals and how to intervene in a changing ecosystem.

  1. Testing OGC Web Feature and Coverage Service performance: Towards efficient delivery of geospatial data

    Directory of Open Access Journals (Sweden)

    Gregory Giuliani

    2013-12-01

    Full Text Available OGC Web Feature Service (WFS and Web Coverage Service (WCS specifications allow interoperable access to distributed geospatial data made available through spatial data infrastructures (SDIs. To ensure that a service is sufficiently responsive to fulfill users’ expectations and requirements, performance of services must be measured and monitored to track latencies, bottlenecks, and errors that may negatively influence its over- all quality. Despite the importance of data retrieval and access, little research has been published on this topic and mostly concentrates on the usability of services when integrating distributed data sources. Considering these issues, this paper extends and validates the FOSS4G approach to measure the server-side performance of different WFS and WCS services provided by various software implementations; and provides guidance to data providers looking to improve the quality of their services. Our results show that performance of tested implementations is generally satisfactory and memory tuning/data and storage optimization are essential to handle increased efficiency and reliability of services.

  2. Performance Evaluation of a New Method for Service-Oriented Developed Testing Software

    Directory of Open Access Journals (Sweden)

    Ibrahim Azhdari pour

    2016-02-01

    Full Text Available Today, using software is increasing significantly. The incidence of human errors in the process of producing software is inevitable. So, the necessity of testing the software in the process of their production becomes very important. Software testing is the process of software assessment to be sure of its correct performance under different conditions. To avoid the complexity in the software production, an architectural style is adopted for the software production. There are different architectural styles for the software production. One of these styles is the service-oriented architecture. A group of software that the service-oriented architecture is adopted for their production is called the service-oriented software, or the developed service-oriented software. In this article, we will make a comparison between different testing methods, and International Software Testing Qualification Board (ISTQB testing framework. Then, using simulation, we will get the conclusion that our suggested testing method is nearly 2 times more capable of detecting the committed errors in the software rather than other methods, which it will lead to the more satisfaction of the users, and the customers.

  3. Variation in healthcare services for specialist genetic testing and implications for planning genetic services: the example of inherited retinal dystrophy in the English NHS

    National Research Council Canada - National Science Library

    Harrison, Mark; Birch, Stephen; Eden, Martin; Ramsden, Simon; Farragher, Tracey; Payne, Katherine; Hall, Georgina; Black, Graeme Cm

    2015-01-01

    ...) and survey of English regional genetic testing services were used. Age- and gender-adjusted standardised testing rates were calculated using indirect standardisation, and survey responses were transcribed verbatim and data collated and summarised...

  4. Building the International Testing and Certification Service for Lightning Protection Products

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Lightning Protective Devices Testing Center affiliated to Shanghai Lightning Protection Center (hereinafter referred to as “Testing Center”) is a third-party technical institution specialized in the testing of lightning protection equipment,which has passed the qualification certification and metrology accreditation of Certification and Accreditation Administratin of the People's Republic of China and is approved by China National Accreditation Service for Conformity Assessment Meanwhile,it is also a lightning products quality inspection institution authorized by Shanghai Municipal Bureau of Quality and Technical Superwsion and the only lightning products testing laboratory authorized by China Quality Certification Center.The Center has always attached great importance to the standardization work,and accumulated rich successful experiences in enhancing the testing capability and technical service level by means of standardization.

  5. 46 CFR 54.05-20 - Impact test properties for service of 0 °F and below.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Impact test properties for service of 0 °F and below... ENGINEERING PRESSURE VESSELS Toughness Tests § 54.05-20 Impact test properties for service of 0 °F and below. (a) Test energy. The impact energies of each set of transverse Charpy specimens may not be less...

  6. It Takes a Village to Deliver and Test Child and Family-Focused Services.

    Science.gov (United States)

    McKay, Mary M; Gopalan, Geetha; Franco, Lydia M; Kalogerogiannis, Kosta; Umpierre, Mari; Olshtain-Mann, Orly; Bannon, William; Elwyn, Laura; Goldstein, Leah

    2010-01-01

    OBJECTIVES: The purpose of this article is to highlight the benefits of collaboration in child focused mental health services research. METHOD: Three unique research projects are described. These projects address the mental health needs of vulnerable, urban, minority children and their families. In each one, service delivery was codesigned, interventions were co-delivered and a team of stakeholders collaboratively tested the impact of each one. RESULTS: The results indicate that the three interventions designed, delivered, and tested are associated with reductions in youth mental health symptoms. CONCLUSION: These interventions are feasible alternatives to traditional individualized outpatient treatment.

  7. 78 FR 23884 - Seed Testing Service Program; Request for an Extension of and Revision to a Currently Approved...

    Science.gov (United States)

    2013-04-23

    ... Agricultural Marketing Service Seed Testing Service Program; Request for an Extension of and Revision to a... information collection for the Seed Service Testing Program. DATES: Comments on this document must be received... www.regulations.gov . Send written comments to Fawad S. Shah, Director, Seed Regulatory and...

  8. Análise da associação entre a dinamometria isocinética da articulação do joelho e o salto horizontal unipodal, hop test, em atletas de voleibol Análisis de la asociación entre la dinamometria isocinética de la articulación de la rodilla y el salto horizontal unipodal, hop test, en los atletas de voleibol Analysis on the association between isokinetic dynamometry of the knee's articulation and one-leg horizontal jump, hop test, in volleyball athletes

    Directory of Open Access Journals (Sweden)

    Rogério Leão D'Alessandro

    2005-10-01

    ético en las velocidades de 60º/s y 300º/s y en el hop test a distancia. RESULTADOS: Fué observada solamente una correlación baja entre el déficit de pico de cambio (r = 0,441 y de trabajo (r = 0,610 a 60º/s con el déficit de la distancia saltada entre MMII. Fué observada una baja associação entre la performance muscular y la distancia saltada en el hop test excepto en el miembro inferior directo de mujeres. CONCLUSIÓN: Este estudio mostró que el hop test no puede ser usado para substituir la dinamometría isocinética en la evaluación de la función muscular.The isokinetic dynamometer has been widely used to assess the muscle performance. Due to its high cost, the use of such device in clinical practice becomes unfeasible. The one-leg hop is a test to evaluate the strength and reliance on lower limbs that may be used in routine clinical trials at low cost, being no time-consuming. The present study aimed to assess whether there is any association between the hop test and the muscular function data provided by the knee evaluations at the isokinetic dynamometer in professional athletes. MATERIAL AND METHODS: Thirty volleyball players (8 women and 22 men were evaluated by means of isokinetic dynamometer at speeds of 60º/s and 300º/s, and through the hop test at distance. RESULTS: It was observed a low correlation between the deficit of the peak torque (r = 0,441 and the work (r = 0,610 at 60º/s, with a deficit for hopped distance between lower limbs. Moreover, it was found a low correlation between the muscle performance and the distance reached during the hop test, except for women in the right lower limb. CONCLUSION: The current study has shown that the hop test cannot be used to replace isokinetic dynamometric tests for functional tests.

  9. Assessment of electrochemical potentiokinetic reactivation tests to qualify stainless steel for nitric acid service

    Energy Technology Data Exchange (ETDEWEB)

    Olsen, A.R.; Dillon, J.J.; Peters, A.H.; Clift, T.L.

    1986-12-31

    To minimize the costs and delivery time delays associated with purchasing type 304L stainless steel materials for service in nitric-acid-containing media, an alternative to the current Oak Ridge Y-12 Plant requirement of testing in accordance with American Society for Testing and Materials (ASTM) A 262, Practice C (the boiling nitric acid test), is being sought. A possible candidate is the electrochemical potentiokinetic reactivation (EPR) test being developed for the nuclear industry and under consideration for acceptance as an ASTM standard. Based on a review of the literature and some limited screening tests, this test, as currently proposed, is not a suitable substitute for the nitric acid test. However, with additional development the EPR test is a likely candidate for providing a quantitative substitute for the current qualitative oxalic acid etching (ASTM A 282, Practice A) often used to accept, but not reject, materials for use in a nitric acid medium.

  10. Input-output Conformance Testing for Channel-based Service Connectors

    Directory of Open Access Journals (Sweden)

    Natallia Kokash

    2011-08-01

    Full Text Available Service-based systems are software systems composed of autonomous components or services provided by different vendors, deployed on remote machines and accessible through the web. One of the challenges of modern software engineering is to ensure that such a system behaves as intended by its designer. The Reo coordination language is an extensible notation for formal modeling and execution of service compositions. Services that have no prior knowledge about each other communicate through advanced channel connectors which guarantee that each participant, service or client, receives the right data at the right time. Each channel is a binary relation that imposes synchronization and data constraints on input and output messages. Furthermore, channels are composed together to realize arbitrarily complex behavioral protocols. During this process, a designer may introduce errors into the connector model or the code for their execution, and thus affect the behavior of a composed service. In this paper, we present an approach for model-based testing of coordination protocols designed in Reo. Our approach is based on the input-output conformance (ioco testing theory and exploits the mapping of automata-based semantic models for Reo to equivalent process algebra specifications.

  11. Standard Test Method for Testing Polymeric Seal Materials for Geothermal and/or High Temperature Service Under Sealing Stress

    CERN Document Server

    American Society for Testing and Materials. Philadelphia

    1985-01-01

    1.1 This test method covers the initial evaluation of (screening) polymeric materials for seals under static sealing stress and at elevated temperatures. 1.2 This test method applies to geothermal service only if used in conjunction with Test Method E 1068. 1.3 The test fluid is distilled water. 1.4 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

  12. Pill testing or drug checking in Australia: Acceptability of service design features.

    Science.gov (United States)

    Barratt, Monica J; Bruno, Raimondo; Ezard, Nadine; Ritter, Alison

    2017-06-20

    This study aimed to determine design features of a drug-checking service that would be feasible, attractive and likely to be used by Australian festival and nightlife attendees. Web survey of 851 Australians reporting use of psychostimulants and/or hallucinogens and attendance at licensed venues past midnight and/or festivals in the past year (70% male; median age 23 years). A drug-checking service located at festivals or clubs would be used by 94%; a fixed-site service external to such events by 85%. Most (80%) were willing to wait an hour for their result. Almost all (94%) would not use a service if there was a possibility of arrest, and a majority (64%) would not use a service that did not provide individual feedback of results. Drug-checking results were only slightly more attractive if they provided comprehensive quantitative results compared with qualitative results of key ingredients. Most (93%) were willing to pay up to $5, and 68% up to $10, per test. One-third (33%) reported willingness to donate a whole dose for testing: they were more likely to be male, younger, less experienced, use drugs more frequently and attend venues/festivals less frequently. In this sample, festival- or club-based drug-checking services with low wait times and low cost appear broadly attractive under conditions of legal amnesty and individualised feedback. Quantitative analysis of ecstasy pills requiring surrender of a whole pill may appeal to a minority in Australia where pills are more expensive than elsewhere. [Barratt MJ, Bruno R, Ezard N, Ritter A. Pill testing or drug checking in Australia: Acceptability of service design features. Drug Alcohol Rev 2017;00:000-000]. © 2017 Australasian Professional Society on Alcohol and other Drugs.

  13. Análise do autoconceito de atletas de voleibol de rendimento Analyse of self concept in volleyball teams

    Directory of Open Access Journals (Sweden)

    Lenamar Fiorese Vieira

    2010-09-01

    Full Text Available Esta pesquisa buscou investigar a valorização do autoconceito em equipes de voleibol de alto rendimento. Foram sujeitos 31 atletas de voleibol, das categorias adulto masculina, juvenil masculina e juvenil feminina. Utilizou-se como instrumento de medida a Escala Fatorial de Autoconceito. Para a análise dos dados foram utilizados os testes kruskall-Wallis e MANOVA. Os dados demonstraram que as equipes comportaram-se de forma semelhante quanto aos fatores do autoconceito, ocorrendo diferença estatisticamente significativa para o fator segurança entre as equipes juvenis feminina e masculina. O fator ético-moral apresentou altos níveis de valorização em relação aos outros fatores, sendo estatisticamente superior nas equipes feminina e masculina juvenis. Na equipe masculina adulta este fator foi superior aos fatores "somático", "receptividade" e "atitude social". O sentimento de pertencer a um grupo socialmente valorizado parece ser o principal motivo de os atletas se perceberem como sujeitos morais. Conclui-se que existem diferenças de gênero quanto ao autoconceito ("segurança", de modo que o esporte favorece o sentimento de "moralidade" e vivências de autoconsideração, propiciando a congruência do self-experiência.This research aimed to investigate the valuation of self concept in volleyball teams. As participants, 31 volleyball high performance athletes adults and youths from both gender categories were investigated. As measure instrument the Factorial Scale of Self Concept was used. For the data analysis were used: the Kruskall Wallis test and MANOVA. All teams behaved similarly according to self concept factors, evidencing statistically significant difference only for safety factor between the youth male and female teams. The ethical-moral factor presented high levels of valuation in relation to other factors, being statistically higher in the female and male youth teams. In the adult male team, this factor was higher than

  14. Integrating IMS Learning Design and IMS Question and Test Interoperability using CopperCore Service Integration

    NARCIS (Netherlands)

    Vogten, Hubert; Martens, Harrie; Nadolski, Rob; Tattersall, Colin; Van Rosmalen, Peter; Koper, Rob

    2006-01-01

    Please, cite this publication as: Vogten, H., Martens, H., Nadolski, R., Tattersall, C., van Rosmalen, P., & Koper, R. (2006). Integrating IMS Learning Design and IMS Question and Test Interoperability using CopperCore Service Integration. Proceedings of International Workshop in Learning Networks f

  15. CopperCore Service Integration, Integrating IMS Learning Design and IMS Question and Test Interoperability

    NARCIS (Netherlands)

    Vogten, Hubert; Martens, Harrie; Nadolski, Rob; Tattersall, Colin; Van Rosmalen, Peter; Koper, Rob

    2006-01-01

    Vogten, H., Martens, H., Nadolski, R., Tattersall, C., Rosmalen, van, P., Koper, R., (2006). CopperCore Service Integration, Integrating IMS Learning Design and IMS Question and Test Interoperability. Proceedings of the 6th IEEE International Conference on Advanced Learning Technologies (pp. 378-379

  16. CopperCore Service Integration, Integrating IMS Learning Design and IMS Question and Test Interoperability

    NARCIS (Netherlands)

    Vogten, Hubert; Martens, Harrie; Nadolski, Rob; Tattersall, Colin; Van Rosmalen, Peter; Koper, Rob

    2006-01-01

    Vogten, H., Martens, H., Nadolski, R., Tattersall, C., Rosmalen, van, P., Koper, R., (2006). CopperCore Service Integration, Integrating IMS Learning Design and IMS Question and Test Interoperability. Proceedings of the 6th IEEE International Conference on Advanced Learning Technologies (pp.

  17. Using VITA Service Learning Experiences to Teach Hypothesis Testing and P-Value Analysis

    Science.gov (United States)

    Drougas, Anne; Harrington, Steve

    2011-01-01

    This paper describes a hypothesis testing project designed to capture student interest and stimulate classroom interaction and communication. Using an online survey instrument, the authors collected student demographic information and data regarding university service learning experiences. Introductory statistics students performed a series of…

  18. CopperCore Service Integration, Integrating IMS Learning Design and IMS Question and Test Interoperability

    NARCIS (Netherlands)

    Vogten, Hubert; Martens, Harrie; Nadolski, Rob; Tattersall, Colin; Van Rosmalen, Peter; Koper, Rob

    2006-01-01

    Vogten, H., Martens, H., Nadolski, R., Tattersall, C., Rosmalen, van, P., Koper, R., (2006). CopperCore Service Integration, Integrating IMS Learning Design and IMS Question and Test Interoperability. Proceedings of the 6th IEEE International Conference on Advanced Learning Technologies (pp. 378-379

  19. Failed culture change aimed at more service provision: A test of three agentic factors

    NARCIS (Netherlands)

    Jorritsma, P.Y.; Wilderom, Celeste P.M.

    2012-01-01

    Purpose – Headquarters managers of a medium-sized manufacturing company initiated a culture change in five of their dispersed wholesale units. The aim was for more external service quality. This paper aims to report the results of a test of three hypotheses, shedding light on the behavior of the

  20. A TEST TO DEMONSTRATE A DIGITAL WEB-BASED OILFIELD DATA COLLECTION SERVICE

    Energy Technology Data Exchange (ETDEWEB)

    Rochelle, J.

    2001-09-30

    The U.S. Department of Energy and HIS Energy tested a web-based field data collection service, FieldDIRECT, at NPR-3. FieldDIRECT provided a way to digitally collect oil and gas data from the field, transfer it quickly, accurately and securely via the Internet, and utilize it immediately to generate executive, operational and administrative reports.

  1. Community Mental Health Service Providers' Codes of Ethics and the "Standards for Educational and Psychological Testing".

    Science.gov (United States)

    Vacc, Nicholas A.; Juhnke, Gerald A.; Nilsen, Keith A.

    2001-01-01

    Compares the codes of ethics of 13 professional organizations for community mental health service providers. Results suggest that only two of the codes of ethics address many of the "Standards for Educational and Psychological Testing." Provides implications and recommendations for professional organizations. (Contains 20 references and…

  2. Failed culture change aimed at more service provision: A test of three agentic factors

    NARCIS (Netherlands)

    Jorritsma, P.Y.; Wilderom, C.P.M.

    2012-01-01

    Purpose – Headquarters managers of a medium-sized manufacturing company initiated a culture change in five of their dispersed wholesale units. The aim was for more external service quality. This paper aims to report the results of a test of three hypotheses, shedding light on the behavior of the inv

  3. Lead-Testing Service to Elementary and Secondary Schools Using Anodic Stripping Voltammetry

    Science.gov (United States)

    Goebel, Amanda; Vos, Tracy; Louwagie, Anne; Lundbohm, Laura; Brown, Jay H.

    2004-01-01

    The undergraduate chemistry club of the Southwest Minnesota State University offers assistance in lead-testing through the anodic stripping voltammetry (ASV) technique to elementary and secondary schools. Emphasis is given to this community service activity, which has increased club membership, and promoted discussion of water quality problems in…

  4. PAT portable appliance testing : in-service inspection and testing of electrical equipment

    CERN Document Server

    Scaddan, Brian

    2015-01-01

    The Electricity at Work Regulations 1989 requires any electrical system to be constructed, maintained and used in such a manner as to prevent danger. This means that inspection and testing of systems, including portable appliances, is needed in order to determine if maintenance is required. This book explains in clear language what needs to be done and includes expert advice on legislation as well as actual testing. The book contains an appendix providing the electrical fundamentals needed by non-specialists and also has sample questions (with answers) for the C&G 2377 exam. It is also an ideal revision guide for the non-specialist, such as maintenance staff and caretakers who carry out these tasks part-time, alongside their many other duties.

  5. Interpersonal attraction as a measure of estimation of cohesiveness in elite volleyball teams.

    Science.gov (United States)

    Bergeles, Nikolaos; Hatziharistos, Dimitris

    2003-02-01

    This study examined differences in interpersonal attraction between starters and nonstarters of elite male volleyball teams and the correlation between interpersonal attraction and teams' final place. 106 players from 10 teams of the A1 Greek National Volleyball League completed by a sociometric method an especially developed questionnaire. Subjects were classified as starters and nonstarters by means of a protocol of players' starting status administered to teams' coaches. Analysis showed that the task and the social dimension of interpersonal attraction differed significantly between starters and nonstarters. Starters scored higher than nonstarters on both dimensions of interpersonal attraction. Starters' task dimension of interpersonal attraction was positively correlated with the team's task dimension. Also, the teams' task dimension was positively correlated with teams' final placing, suggesting that, when starters are attracted to each other with regard to the common competitive goal, the team's performance is enhanced and leads to higher scoring.

  6. Effect of Age Group on Technical-Tactical Performance Profile of the Serve in Men's Volleyball.

    Science.gov (United States)

    García-de-Alcaraz, Antonio; Ortega, Enrique; Palao, José M

    2016-10-01

    The aim of this study was to analyze the technical-tactical performance profile of the serve for various age groups and categories of competition in men's volleyball. The sample comprised 13,262 serves performed by 986 players in 299 sets observed in various categories of competition (U-14, U-16, U-19, national senior, and international senior). An observational design was used. The variables studied were category of competition, type of execution, and serve performance. The results showed that for higher age groups (senior categories), there were significantly fewer jump serves and poorer serve performance, regardless of players' maturity and training development. The use of the jump serves increased the serve risk while attempting to hinder the organization of the opponent attack. This paper discusses the serve evolution and the implications on the training process at the different age groups in men's volleyball. © The Author(s) 2016.

  7. The jumping action's indices of female volleyball players and their relation at some somatic characteristics

    Directory of Open Access Journals (Sweden)

    Stech M.

    2010-02-01

    Full Text Available In the paper the results of correlation analysis between of most significance jumping action's indices of high performance polish female volleyball players and their some somatic characteristics (stature, weight and body composition indices: BMI, FATkg, FAT%, FFMkg,FFM%, TBWkg and TBW% are presented. It has been found close correlation between of height of attack jump and stature (r=0,98, weight (r=0,76, FFMkg(r=0,88 and TBWkg (r=0,88. But correlation of height of attack jump with FFM% and TBW% was nonessential. Statistical essential correlation between basic indices of plyometric factor and FAT%, FFM% and TBW% indices (accordingly r = -0,65; 0,65 and 0,66 has been found. The results of the study may be taking into consideration in order to elaboration of effective jumping methods for volleyball players.

  8. The Relationship between leadership styles of coaches with motivational climate of Iranian Elite Male Volleyball Players

    Directory of Open Access Journals (Sweden)

    Younis Mohammadzade

    2012-01-01

    Full Text Available The main objective of this study was to investigate the relationship between leadership styles of coaches with motivational climate of Iranian elite male Volleyball players. It was survey research and field study. Statistical population was all players in men's volleyball league in Iran. According to the Morgan sampling table, 150 samples were investigated. To collect information, we applied motivational climate Questionnaire (PMCSQ and leadership styles in sports (LSS.The data analysis methods were descriptive statistics, and multivariate regression was used to investigate the relationship between variables. Results showed that there was a significant relationship between the leadership styles of coaches and motivational climate (p<0.05 There was a significant relationship between the authoritative style of leadership styles with positive feedback and motivational climate. Overall, a leadership style of coaches is most important predictive factor of the motivational climate.

  9. Ankle Bracing, Fatigue, and Time to Stabilization in Collegiate Volleyball Athletes

    Science.gov (United States)

    Shaw, Megan Y; Gribble, Phillip A; Frye, Jamie L

    2008-01-01

    Context: Fatigue has been shown to disrupt dynamic stability in healthy volunteers. It is not known if wearing prophylactic ankle supports can improve dynamic stability in fatigued athletes. Objective: To determine the type of ankle brace that may be more effective at providing dynamic stability after a jump-landing task during normal and fatigued conditions. Design: Two separate repeated-measures analyses of variance with 2 within-subjects factors (condition and time) were performed for each dependent variable. Setting: Research laboratory. Patients or Other Participants: Ten healthy female collegiate volleyball athletes participated (age  =  19.5 ± 1.27 years, height  =  179.07 ± 7.6 cm, mass  =  69.86 ± 5.42 kg). Intervention(s): Athletes participated in 3 separate testing sessions, applying a different bracing condition at each session: no brace (NB), Swede-O Universal lace-up ankle brace (AB), and Active Ankle brace (AA). Three trials of a jump-landing task were performed under each condition before and after induced functional fatigue. The jump-landing task consisted of a single-leg landing onto a force plate from a height equivalent to 50% of each participant's maximal jump height and from a starting position 70 cm from the center of the force plate. Main Outcome Measure(s): Time to stabilization in the anterior-posterior (APTTS) and medial-lateral (MLTTS) directions. Results: For APTTS, a condition-by-time interaction existed (F2,18  =  5.55, P  =  .013). For the AA condition, Tukey post hoc testing revealed faster pretest (2.734 ± 0.331 seconds) APTTS than posttest (3.817 ± 0.263 seconds). Post hoc testing also revealed that the AB condition provided faster APTTS (2.492 ± 0.271 seconds) than AA (3.817 ± 0.263 seconds) and NB (3.341 ± 0.339 seconds) conditions during posttesting. No statistically significant findings were associated with MLTTS. Conclusions: Fatigue increased APTTS for the AA condition. Because the

  10. An Analysis of Offensive and Defensive Capability for Chinese Women's Volleyball Team in the 30th Olympic Games%第30届奥运会中国女排攻防能力分析

    Institute of Scientific and Technical Information of China (English)

    韩盼星

    2015-01-01

    2012年7月28日至8月11日,第30届伦敦奥运会女子排球比赛在伦敦伯爵球场举行. 中国女子排球队虽然成功闯入八强,但却遗憾输给了日本女子排球队无缘四强. 中国女排到底是否能跟上世界第一集团,文章通过对进攻和防守两个因素进行剖析,以第30届伦敦奥运会中国、巴西和美国女排分别参加所有场次比赛的攻防单个技术为研究对象,运用文献资料法、专家访谈法、录像观察法、数理统计法和逻辑分析法,将中国女子排球队在第30届伦敦奥运会参加的6场比赛与美国女子排球队和巴西女子排球队各自参加的8场比赛在单个技术上进行录像统计并做对比分析(T检验),为中国女排缩小与世界女排第一集团的差距提供数据参考,并提出合理化建议.%From July 28 to August 11 in 2012,the 30th Olympic Games for women's volleyball tourna-ment was held in London Earl's court. Although Chinese women's volleyball team managed into the quarterfi-nals successfully,the team missed the semi-finals because of failing to win the Japanese women's volleyball team. To find whether Chinese women's volleyball team can keep up with the world's first group in the end, this paper analyzes by two factors,offensive and defensive. According to these single offensive and defensive techniques employed among China, Brazil and the United States women's volleyball team attended in the 30th London Olympic Games. Using the methods of literature,expert interviews, video observation,mathe-matical statistics and logical analysis,this paper makes a comparative analysis(T-test)to provide data for the Chinese women's volleyball team to narrow the gap with the first group of the world's women's volleyball lev-el,and to make reasonable suggestions.

  11. 排球运动训练的创新探论%Volleyball Training Innovation Research

    Institute of Scientific and Technical Information of China (English)

    董娜

    2014-01-01

    随着强身健体的思想不断促进,排球运行具有其他球类没有的优势,越来越被人们所接受和喜爱。而且排球运行正从多层次、多渠道培育优秀的体育人才,但是纵观许多排球运行的训练上依然采用老方法,通过训练收获甚少,距离排球运行训练目标相距甚远。在新形势下必须要认清排球运行的基本特征,有针对性的对排球运行训练进行创新,才能够满足排球运行训练的要求。%along with the continuously promote physical fitness ideas ,volleyball operation has the advantages of other ball games no more and more accepted and loved .And volleyball is running from the multi-level and multi-channel cultivation is ex-cellent sports talent ,but across many volleyball training is still the old methods of operation ,little harvest through training ,far distance running volleyball training objectives .Under the new situation ,therefore ,must want to recognize the basic characteristics of volleyball run ,targeted to run to the volleyball training to innovate ,to meet the requirements of volleyball training operation.

  12. Defensive facilitation through serving in high level female volleyball LA FACILITACIÓN DEFENSIVA A TRAVÉS DEL SAQUE EN EL VOLEIBOL FEMENINO DE ALTO NIVEL

    Directory of Open Access Journals (Sweden)

    R. Calvo

    2010-09-01

    Full Text Available

    This study provides solutions for the trajectories election of the serve in female volleyball of high level. This element endows women performance with peculiarity in this sport, and, therefore it's one key in the evolution of the game.
    As a sample to the survey, they took the players of the Olympic Games of Atlanta in 1996, the last internationall volleyball competition of the highest importance. They were twelve female national teams, confronted in 42 matches, and distributed in 146 sets. 28 sets of female competition were used, they were singled out from 13 matches of which 1824 cases of serve change were recorded.
    The variables kept in mind are those that represent values related to the performance of the team that receives the serve, and those that describe the trajectories selected by the servers.
    KEY WORDS: Female volleyball, service, high performance, technique.

     

    El presente estudio aporta soluciones en cuanto a la elección de trayectorias del saque en el voleibol femenino de alto nivel, por tratarse del elemento que, prioritariamente, dota de peculiaridad el rendimiento de las mujeres en este deporte y, por tanto uno de los elementos claves en la evolución del juego.
    Se tomó como población objeto de estudio a las jugadoras de los Juegos Olímpicos de Atlanta en 1996, último acontecimiento de la máxima relevancia en el voleibol internacional. Un total de doce equipos nacionales femeninos, confrontados en 42 encuentros, distribuidos en 146 sets. Para seleccionar la muestra se recurrió a 28sets de la competición femenina, de entre 13 encuentros, de los que se registraron 1824 casos de cambio de saque.
    Las variables tenidas en cuenta son las que representan valores relacionados con el rendimiento del equipo que recibe el saque, y las que describen las trayectorias seleccionadas por las sacadoras.
    PALABRAS CLAVE

  13. Assessment of nutrition, supplementation and body composition parameters on the example of professional volleyball players.

    Science.gov (United States)

    Zapolska, Joanna; Witczak, Katarzyna; Mańczuk, Angelika; Ostrowska, Lucyna

    2014-01-01

    Volleyball is a team game belonging to a group of sports disciplines that involve indirect fighting. Adequate energy coverage in athletes is a crucial issue. It depends primarily on the type, intensity and duration of physical activity related to the sports discipline practiced and to the training cycle duration. The average energy requirement in sportsmen is 50% higher than that of adults. The aim of the study was to characterize the mode of nutrition, including dietary supplements and to assess somatic indices in female volleyball players of the AZS Bialystok team. The study involved 17 women. Research tools included a questionnaire consisting of 24-hour recall, a questionnaire survey concerning supplement intake and body composition analysis performed using a bioimpedance analyzer InBody 220. Data analysis indicates that the anthropometric characteristics and body composition of the AZS Bialystok players meet the recommendations associated with the somatic features in volleyball. Daily diet of the volleyball players were of low-energy with regard to the recommendations for physically active people, with very low supply of carbohydrates and dietary fiber, excessive proportion of saturated fatty acids and dietary cholesterol, and too low content of monounsaturated and polyunsaturated fatty acids. Supply of vitamins and minerals was found to be alarmingly low, especially of iron and calcium; diet supplementation was insufficient. No significant abnormalities were noted in body composition of the study athletes. However, they are recommended to increase muscle mass and slightly reduce body fat. Results of diet evaluation show the need for education in the field of nutrition and the necessity of further research into dietary habits among sportsmen.

  14. Effects of habitual loading on patellar tendon mechanical and morphological properties in basketball and volleyball players.

    Science.gov (United States)

    Zhang, Z J; Ng, G Y F; Fu, S N

    2015-11-01

    Tendon mechanical properties are linked to sports performance and tendon-related injuries, such as tendinopathy. Whether habitual loading, such as participation in regular jumping activities, would induce adaptation on tendon mechanical properties remains unclear. Forty healthy subjects (10 sedentary, 15 volleyball players, and 15 basketball players) aged between 18 and 35 years were recruited. Supersonic shearwave imaging was used to measure the shear elastic modulus and thickness and cross-sectional area (CSA) of the proximal patellar tendons of both knees at 30° of flexion. Significant group differences in tendon shear elastic modulus were found among the three groups. In the dominant leg, reduction in tendon shear elastic modulus by 18.9 % (p = 0.018) and 48.7 % (p = 0.000) were observed in the basketball and volleyball players, respectively, when compared with sedentary subjects. In the non-dominant leg, reduction in tendon shear elastic modulus were 27.3 % (p = 0.034) and 47.1 % (p = 0.02) in the basketball and volleyball players, respectively. The athlete groups were found to have larger CSA but with similar tendon thickness than sedentary group. The CSA were larger by 24-29 % and by 22-24 % in the basketball players and volleyball players, for the dominant and non-dominant legs, respectively (all p < 0.05). Age and body mass are related to tendon stiffness and CSA, particularly in the sedentary subjects. The proximal patellar tendon can undergo substantial adaptation on tendon mechanical and morphological properties when exposed in jumping sports. Intrinsic factors such as age and body mass could influence tendon properties.

  15. Rotational Angles and Velocities During Down the Line and Diagonal Across Court Volleyball Spikes

    Directory of Open Access Journals (Sweden)

    Justin R. Brown

    2014-05-01

    Full Text Available The volleyball spike is an explosive movement that is frequently used to end a rally and earn a point. High velocity spikes are an important skill for a successful volleyball offense. Although the influence of vertical jump height and arm velocity on spiked ball velocity (SBV have been investigated, little is known about the relationship of shoulder and hip angular kinematics with SBV. Other sport skills, like the baseball pitch share similar movement patterns and suggest trunk rotation is important for such movements. The purpose of this study was to examine the relationship of both shoulder and hip angular kinematics with ball velocity during the volleyball spike. Methods: Fourteen Division I collegiate female volleyball players executed down the line (DL and diagonally across-court (DAC spikes in a laboratory setting to measure shoulder and hip angular kinematics and velocities. Each spike was analyzed using a 10 Camera Raptor-E Digital Real Time Camera System.  Results: DL SBV was significantly greater than for DAC, respectively (17.54±2.35 vs. 15.97±2.36 m/s, p<0.05.  The Shoulder Hip Separation Angle (S-HSA, Shoulder Angular Velocity (SAV, and Hip Angular Velocity (HAV were all significantly correlated with DAC SBV. S-HSA was the most significant predictor of DAC SBV as determined by regression analysis.  Conclusions: This study provides support for a relationship between a greater S-HSA and SBV. Future research should continue to 1 examine the influence of core training exercise and rotational skill drills on SBV and 2 examine trunk angular velocities during various types of spikes during play.

  16. 76 FR 55082 - Re-Accreditation and Re-Approval Intertek Testing Services as a Commercial Gauger and Laboratory

    Science.gov (United States)

    2011-09-06

    ..., Intertek Testing Services/Caleb Brett, Corpus Christi, Texas 78406, has been re-approved to gauge petroleum and petroleum products, organic chemicals and vegetable oils, and to test petroleum and petroleum... Homeland Security. ACTION: Notice of re-approval of Intertek Testing Services, Corpus Christi, Texas, as a...

  17. Outreach syphilis testing services by different health providers to female sex workers in southern China.

    Directory of Open Access Journals (Sweden)

    Xiang-Sheng Chen

    Full Text Available Health providers have played important roles on delivering prevention and care services to control syphilis in China. The current study was aimed to evaluate the performance of different health providers in providing outreach syphilis testing services to female sex workers (FSWs. The current study carried out during April to August 2009 in Liuzhou was aimed to investigate the services delivered by two different types of clinics in China. A total of 1,808 FSWs recruited from sex work venues were included in the study. Prevalence of positive syphilis test (6.4% among FSWs accessed by the local center for disease control outreach teams (CDC teams was significantly lower than that (9.3% among FSWs accessed by the local reproductive health hospital outreach teams (RHH teams. As compared with CDC teams, RHH teams had more FSWs to be successfully referred to the designated STD clinics for further syphilis confirmation and intervention (85.7% vs. 26.7%, P<0.001. These findings indicate that RHH teams may be more efficient than CDC teams to provide outreach-based services to FSWs. Participation of the reproductive health providers or other medical facilities in outreach services to FSWs should be considered in developing intervention programs in China.

  18. Outreach Syphilis Testing Services by Different Health Providers to Female Sex Workers in Southern China

    Science.gov (United States)

    Chen, Xiang-Sheng; Yin, Yue-Ping; Liu, Guo-Gu; Wei, Wan-Hui; Wang, Hong-Chun; Yu, Yuan-Lin; Mabey, David C.; Peeling, Rosanna W.

    2013-01-01

    Health providers have played important roles on delivering prevention and care services to control syphilis in China. The current study was aimed to evaluate the performance of different health providers in providing outreach syphilis testing services to female sex workers (FSWs). The current study carried out during April to August 2009 in Liuzhou was aimed to investigate the services delivered by two different types of clinics in China. A total of 1,808 FSWs recruited from sex work venues were included in the study. Prevalence of positive syphilis test (6.4%) among FSWs accessed by the local center for disease control outreach teams (CDC teams) was significantly lower than that (9.3%) among FSWs accessed by the local reproductive health hospital outreach teams (RHH teams). As compared with CDC teams, RHH teams had more FSWs to be successfully referred to the designated STD clinics for further syphilis confirmation and intervention (85.7% vs. 26.7%, P<0.001). These findings indicate that RHH teams may be more efficient than CDC teams to provide outreach-based services to FSWs. Participation of the reproductive health providers or other medical facilities in outreach services to FSWs should be considered in developing intervention programs in China. PMID:23637755

  19. Body composition and muscle strength predictors of jumping performance: differences between elite female volleyball competitors and nontrained individuals.

    Science.gov (United States)

    Ćopić, Nemanja; Dopsaj, Milivoj; Ivanović, Jelena; Nešić, Goran; Jarić, Slobodan

    2014-10-01

    Studies of the role of various anthropometric, physiological, and biomechanical variables in performance of rapid movements have generally revealed inconsistent findings. Within this study, we tested the hypotheses that (a) both body composition and leg extensor strength variables would reveal significant relationship with jumping performance, whereas (b) the same relationships would be stronger in physically active nonathletes than in the elite athletes proficient in vertical jumping. Top-level female volleyball players (VP; N = 35) and physically active female nonathletes (PA; N = 21) were tested on maximum vertical jumps performed with and without arm swing, as well as on body composition (percent fat and muscle) and leg press strength (maximum force and the rate of force development). The results revealed significant relationships between the jumping performance and body composition variables that appeared to be higher in PA (r = 0.65-0.76; all p < 0.01) than in VP (r = 0.37-0.42; all p ≤ 0.05). The relationships between the jumping performance and the leg strength variables were mainly significant (r = 0.23-0.68) and similar in 2 groups. We conclude that not only the leg extensor strength but also the body composition variables could be valid predictors of jumping performance and, possibly, other rapid movements. Moreover, the body composition variables that have been mainly neglected in the literature could be particularly strong predictors of performance of jumping in nonathletes, as compared with relatively homogeneous populations of elite athletes.

  20. The effects of rope or weighted rope jump training on strength, coordination and proprioception in adolescent female volleyball players.

    Science.gov (United States)

    Ozer, D; Duzgun, I; Baltaci, G; Karacan, S; Colakoglu, F

    2011-06-01

    The aim was to assess the effects of a 12-week "rope jumping" and "weighted rope jumping" training programs on functional parameters including multi-joint coordination and proprioception, strength, endurance in adolescent female volleyball players. Pretest posttest experimental design. Weighted Rope Training group (N.=9; 15±1 years), Rope Training group (N.=9; 14.1±1.3 years) and Controls (N.=7; 14.4±1.3 years). Motor coordination, proprioception, strength and endurance of the lower extremities with concentric and eccentric performances in closed kinetic chain on multi joint system assessed by the Monitorized Squat system. Absolute average error (cm) and the standard deviation for coordination and proprioception, Peak Force (N), Total Work (Nm), Average Power (Nm/s), Maximal Speed for strength and endurance tests were calculated. Kruskal-Wallis and Mann Whitney U test were utilized. Weighted rope jump group had significant decrease for the deviation results of coordination on the concentric and eccentric phases for both legs (PRope jump and weighted rope jump groups had significantly lower results on non visible second movement deviation (PRope Training group in comparison to controls (PRope Training and control groups improved in concentric maximal speed (PRope Training group (Prope jump to training programs improves joint repositioning and coordination. Weighted Rope Training group got greater gains for coordination and eccentric endurance parameters for lower extremities in a closed kinetic chain.

  1. THE FOURTH EDITION OF THE EUROPEAN VOLLEYBALL CHAMPIONSHIP, BUCHAREST 1955 – AN ANALYTICAL APPROACH

    Directory of Open Access Journals (Sweden)

    Ileana-Monica Popovici

    2016-10-01

    Full Text Available From 15 to 26 June 1955, the Romanian capital hosted the fourth edition of the European Volleyball Championship, both women and men. This edition, scheduled four years after the previous one, also registered a record of participation for those times: 14 teams entered the men’s competition and 6 attended the women’s. In the end, the Romanian men representative occupied an honourable second position in the charts, while the women were only fourth. The European titles went to Czechoslovakia, which clearly dominated the competition. The tournament was programmed to take place in Floreasca Hall and Dinamo Sports Park in Bucharest. The main aim of our present study is that of providing a detailed analysis of this sports event, which belongs to a period when the European volleyball championships did not have a regular scheduling, and the number of competing teams was not officially pre-established. Our second goal is that of framing this competition into the larger political context which deeply influenced its development. The sports event happening in Bucharest proved to be a success, both from the perspective of the quality of the featured competitions, and from the organizational point of view, thus placing the country among the select few volleyball promoters worldwide

  2. BILATERAL VOLLEYBALL-RELATED DEFORMITY OF THE LITTLE FINGERS: MALLET FINGER AND CLINODACTYLY MIMIC

    Directory of Open Access Journals (Sweden)

    Mustafa Uslu

    2011-03-01

    Full Text Available A 14-year-old male high school volleyball player was seen to evaluate right- and left-hand little-finger distal interphalangeal joint deformity and pain. His symptoms began during his second season of competitive play. The distal interphalangeal (DIP joints of the little fingers flexed 20-30°, and a 10-15° valgus deformity was seen at the same joints. Pain was relieved with rest but returned immediately after playing volleyball, so plain radiographs were obtained. The flexion and valgus deformity was obvious on plain radiographs and through a clinical examination. Thus, a bilateral little-finger distal phalanx base epiphysis injury was seen. This injury is characterized by a biplanar Salter Harris physeal injury; type 5 on anteroposterior radiographs and type 2 on lateral plain radiographs. The deformity occurred as a result of competitive volleyball play. To our knowledge, this is the first reported case of a bilateral biplanar physial injury of the base of distal phalanges of the little fingers. Flexion and valgus deformities of DIP joints are a result of repeated micro traumas around the physis.

  3. Characteristics and contributing factors related to sports injuries in young volleyball players.

    Science.gov (United States)

    Vanderlei, Franciele Marques; Bastos, Fabio Nascimento; Tsutsumi, Gustavo Yuki Cantalejo; Vanderlei, Luiz Carlos Marques; Netto Júnior, Jayme; Pastre, Carlos Marcelo

    2013-10-14

    The participation of young in volleyball is becoming increasingly common, and this increased involvement raises concerns about the risk of installation of sports injuries. Therefore, the objectives the study were identify the characteristics of sports injuries in young volleyball players and associate anthropometric and training variables with contributing factors for injuries. A total of 522 volleyball players participating in the High School Olympic Games of the State of São Paulo (Brazil) were interviewed. A reported condition inquiry was used to gather information on injuries, such as anatomic site affected, mechanism and moment of injury, as well as personal and training data. The level of significance was set at 5%. A 19% frequency of injuries was found. Higher age, weight, height, body mass index and training duration values were associated with the occurrence of injuries. The most affected anatomic site was the ankle/foot complex (45 injuries, 36.3%). Direct contact and contactless mechanisms were the main causes of injuries (61 injuries; 49.2% and 48 injuries; 38.7%, respectively). Training was the moment in which most injuries occurred (93 injuries; 75%), independently of personal and training characteristics. Injuries affected the ankle/foot complex with a greater frequency. Direct contact and contactless mechanisms were the most frequently reported and injuries occurred mainly during training sessions. Personal and training characteristics were contributing factors for the occurrence of injuries.

  4. Foveal and peripheral fields of vision influences perceptual skill in anticipating opponents' attacking position in volleyball.

    Science.gov (United States)

    Schorer, Jörg; Rienhoff, Rebecca; Fischer, Lennart; Baker, Joseph

    2013-09-01

    The importance of perceptual-cognitive expertise in sport has been repeatedly demonstrated. In this study we examined the role of different sources of visual information (i.e., foveal versus peripheral) in anticipating volleyball attack positions. Expert (n = 11), advanced (n = 13) and novice (n = 16) players completed an anticipation task that involved predicting the location of volleyball attacks. Video clips of volleyball attacks (n = 72) were spatially and temporally occluded to provide varying amounts of information to the participant. In addition, participants viewed the attacks under three visual conditions: full vision, foveal vision only, and peripheral vision only. Analysis of variance revealed significant between group differences in prediction accuracy with higher skilled players performing better than lower skilled players. Additionally, we found significant differences between temporal and spatial occlusion conditions. Both of those factors interacted separately, but not combined with expertise. Importantly, for experts the sum of both fields of vision was superior to either source in isolation. Our results suggest different sources of visual information work collectively to facilitate expert anticipation in time-constrained sports and reinforce the complexity of expert perception.

  5. Correspondence between training load executed by volleyball players and the one observed by coaches.

    Science.gov (United States)

    Rodríguez-Marroyo, Jose A; Medina, Javier; García-López, Juan; García-Tormo, José V; Foster, Carl

    2014-06-01

    The main aim of this study was to compare the training load (TL) executed by volleyball players with that observed by coaches. Second, we analyzed the influence of the coaches' experience in the estimated TL. Twelve female volleyball players and 4 male coaches participated in this study. During a period of 15 weeks, physical (PT) and technical-tactical training sessions and matches were monitored. In each session, the session rating of perceived exertion (sRPE) was recorded to analyze the players' exercise intensity and TL(RP)E. Coaches were present in all sessions and rated their estimate of sRPE at the same time as the players to calculate the coaches' TL(RPE). Both players' and coaches' mean sRPE (4.0 ± 1.1, 3.7 ± 1.1, and 3.8 ± 1.0 in players and expert and beginning coaches, respectively) and TLRPE (380.1 ± 106.8, 358.3 ± 110.5, and 359.7 ± 108.0 in players and expert and beginning coaches, respectively) were similar. However, a higher (p volleyball.

  6. Anthropometric, body composition and somatotype characteristics of elite female volleyball players from the highest Spanish league.

    Science.gov (United States)

    Martín-Matillas, Miguel; Valadés, David; Hernández-Hernández, Elena; Olea-Serrano, Fátima; Sjöström, Michael; Delgado-Fernández, Manuel; Ortega, Francisco B

    2014-01-01

    This study aimed to describe morphological characteristics of elite female volleyball players from the highest Spanish league, with special focus on differences by performance level and playing positions. Nearly all female players playing in the highest Spanish volleyball league during season 2003/2004 participated in this study (N=148 elite players, 92% of the total). Anthropometric, body composition and somatotype parameters according to performance and playing positions were analysed. The players' characteristics were as follows; body mass 72.3 ± 8.4 kg; stature 179.8 ± 7.1 cm; body fat 24.0 ± 3.1% and skeletal muscle mass 27.3 ± 2.9 kg. Mean somatotype was 3.1 ± 0.7; 3.4 ± 0.9; 3.1 ± 0.9 characterised as central with a tendency to balanced mesomorph. Top level players (whose teams were better classified in the team performance ranking) were taller, had higher skeletal muscle mass and ectomorphy, and had a lower level of adiposity markers, compared with lower level players. Players selected for their respective National teams (individual performance) were taller, heavier, had higher muscle mass and lower endomorphy than non-selected players. Differences according to playing positions were found. This study provides a complete set of reference data on anthropometry, body composition and somatotype of elite female volleyball players. Morphological differences have been identified according to performance level and playing position.

  7. SPECIFIC SITES OF BONE EXPANSION DEPEND ON THE LEVEL OF VOLLEYBALL PRACTICE IN PREPUBESCENT BOYS

    Science.gov (United States)

    Zouch, M.; Zribi, A.; Bouajina, E.; Zaouali, M.; Tabka, Z.

    2013-01-01

    The purpose of this study was to investigate the effect of 18 months of high and low levels of volleyball practice on bone acquisition. 130 prepubescent boys (mean age 11.4 ± 0.7) were divided into a high-level training group (HLG), low-level training group (LLG), and controls. Bone mineral content (BMC) and bone area at the whole body, lumbar spine L2-L4, femoral neck of the dominant leg, and right and left radius were measured using dual-photon X-ray absorptiometry. Enhanced BMC resulted from high-training volleyball activity in all measured sites except the third left and right distal radius, which is not modified by low-level training in prepubescent players but it was accompanied by a bone area expansion in radius and weight-bearing sites for the HLG, and in legs, whole right and left radius for the LLG. Significant improvement of skeletal tissues is associated with the intensity and duration of volleyball training. PMID:24744493

  8. SPECIFIC SITES OF BONE EXPANSION DEPEND ON THE LEVEL OF VOLLEYBALL PRACTICE IN PREPUBESCENT BOYS

    Directory of Open Access Journals (Sweden)

    Hamada Chaari

    2013-06-01

    Full Text Available The purpose of this study was to investigate the effect of 18 months of high and low levels of volleyball practice on bone acquisition. 130 prepubescent boys (mean age 11.4 ± 0.7 were divided into a high-level training group (HLG, low-level training group (LLG, and controls. Bone mineral content (BMC and bone area at the whole body, lumbar spine L2-L4, femoral neck of the dominant leg, and right and left radius were measured using dual-photon X-ray absorptiometry. Enhanced BMC resulted from high-training volleyball activity in all measured sites except the third left and right distal radius, which is not modified by low-level training in prepubescent players but it was accompanied by a bone area expansion in radius and weight-bearing sites for the HLG, and in legs, whole right and left radius for the LLG. Significant improvement of skeletal tissues is associated with the intensity and duration of volleyball training.

  9. Fault Tree Based Diagnosis with Optimal Test Sequencing for Field Service Engineers

    Science.gov (United States)

    Iverson, David L.; George, Laurence L.; Patterson-Hine, F. A.; Lum, Henry, Jr. (Technical Monitor)

    1994-01-01

    When field service engineers go to customer sites to service equipment, they want to diagnose and repair failures quickly and cost effectively. Symptoms exhibited by failed equipment frequently suggest several possible causes which require different approaches to diagnosis. This can lead the engineer to follow several fruitless paths in the diagnostic process before they find the actual failure. To assist in this situation, we have developed the Fault Tree Diagnosis and Optimal Test Sequence (FTDOTS) software system that performs automated diagnosis and ranks diagnostic hypotheses based on failure probability and the time or cost required to isolate and repair each failure. FTDOTS first finds a set of possible failures that explain exhibited symptoms by using a fault tree reliability model as a diagnostic knowledge to rank the hypothesized failures based on how likely they are and how long it would take or how much it would cost to isolate and repair them. This ordering suggests an optimal sequence for the field service engineer to investigate the hypothesized failures in order to minimize the time or cost required to accomplish the repair task. Previously, field service personnel would arrive at the customer site and choose which components to investigate based on past experience and service manuals. Using FTDOTS running on a portable computer, they can now enter a set of symptoms and get a list of possible failures ordered in an optimal test sequence to help them in their decisions. If facilities are available, the field engineer can connect the portable computer to the malfunctioning device for automated data gathering. FTDOTS is currently being applied to field service of medical test equipment. The techniques are flexible enough to use for many different types of devices. If a fault tree model of the equipment and information about component failure probabilities and isolation times or costs are available, a diagnostic knowledge base for that device can be

  10. Stress corrosion cracking tests for low and high alloy steels in sour oilfield service. Tests performed at VTT

    Energy Technology Data Exchange (ETDEWEB)

    Saarinen, K. [VTT Manufacturing Technology, Espoo (Finland). Materials and Structural Integrity; Haemaelaeinen, E. [Helsinki Univ. of Technology, Otaniemi (Finland). Lab. of Engineering Materials

    1996-10-01

    The purpose of the studies was to validate the usefulness of the proposed NACE slow strain rate testing method and compare it with the EFC document. In the NACE document the testing takes place at a temperature of 177 deg C, the test solution contains 20 wt% NaCl, the partial pressure of H{sub 2}S varies between 14 and 28 bar and the partial pressure of CO{sub 2} between 14 and 55 bar. In the NACE document the strain rate is determined as 4 x 10{sup -6} 1/s and in the EFC document 1 x 10{sup -6} 1/s. The results showed brittle behaviour for the test material in all of the test environments, and in each case the elongation was less than 5%. For comparison purposes the SSRT was conducted with the test material also in an inert environment (N{sub 2} gas), where the fracture was ductile and elongation 65%. The tests conducted with different strain rates gave the same result, which shows that the difference between EFC and NACE documents within the strain rate is not significant in the environments studied. However, since the alloy 654 SMO, which is considered to have a high resistance to corrosion, failed the SSRT test in the environments determined in the NACE document, the NACE document can be considered too severe for testing of austenitic stainless steels. Since contrary to the NACE document the EFC document does not determine levels for hydrogen sulphide and carbon dioxide, the EFC document can be considered more suitable than the NACE document for testing of austenitic stainless steels for sour service. (author)

  11. Foucault, surveillance, and carbon monoxide testing within stop-smoking services.

    Science.gov (United States)

    Grant, Aimee; Ashton, Kathryn; Phillips, Rhiannon

    2015-07-01

    Health professionals have adopted proactive testing for early evidence of disease. Researchers have identified that this leads to enumerated understandings and shapes behavior in productive ways. Smoking-cessation advisors regularly test clients for carbon monoxide (CO), but client views of this had not previously been explored. We interviewed 23 clients of a United Kingdom-based stop-smoking service regarding their experiences of CO testing. The majority of participants were successful quitters. We used ATLAS.ti 7 as a data-management tool during structured qualitative analysis. Our findings reveal that clients believed the results of their CO tests. Many became enumerated in their understanding, and thus placed themselves in a hierarchy with other members of their group. Almost all clients found that knowing their CO test score was motivating. We conclude that additional research is needed to understand the experiences of CO testing among clients who do not quit.

  12. Deployment of Directory Service for IEEE N Bus Test System Information

    Science.gov (United States)

    Barman, Amal; Sil, Jaya

    2008-10-01

    Exchanging information over Internet and Intranet becomes a defacto standard in computer applications, among various users and organizations. Distributed system study, e-governance etc require transparent information exchange between applications, constituencies, manufacturers, and vendors. To serve these purposes database system is needed for storing system data and other relevant information. Directory service, which is a specialized database along with access protocol, could be the single solution since it runs over TCP/IP, supported by all POSIX compliance platforms and is based on open standard. This paper describes a way to deploy directory service, to store IEEE n bus test system data and integrating load flow program with it.

  13. Development, test-retest reliability and validity of the Pharmacy Value-Added Services Questionnaire (PVASQ).

    Science.gov (United States)

    Tan, Christine L; Hassali, Mohamed A; Saleem, Fahad; Shafie, Asrul A; Aljadhey, Hisham; Gan, Vincent B

    2015-01-01

    (i) To develop the Pharmacy Value-Added Services Questionnaire (PVASQ) using emerging themes generated from interviews. (ii) To establish reliability and validity of questionnaire instrument. Using an extended Theory of Planned Behavior as the theoretical model, face-to-face interviews generated salient beliefs of pharmacy value-added services. The PVASQ was constructed initially in English incorporating important themes and later translated into the Malay language with forward and backward translation. Intention (INT) to adopt pharmacy value-added services is predicted by attitudes (ATT), subjective norms (SN), perceived behavioral control (PBC), knowledge and expectations. Using a 7-point Likert-type scale and a dichotomous scale, test-retest reliability (N=25) was assessed by administrating the questionnaire instrument twice at an interval of one week apart. Internal consistency was measured by Cronbach's alpha and construct validity between two administrations was assessed using the kappa statistic and the intraclass correlation coefficient (ICC). Confirmatory Factor Analysis, CFA (N=410) was conducted to assess construct validity of the PVASQ. The kappa coefficients indicate a moderate to almost perfect strength of agreement between test and retest. The ICC for all scales tested for intra-rater (test-retest) reliability was good. The overall Cronbach' s alpha (N=25) is 0.912 and 0.908 for the two time points. The result of CFA (N=410) showed most items loaded strongly and correctly into corresponding factors. Only one item was eliminated. This study is the first to develop and establish the reliability and validity of the Pharmacy Value-Added Services Questionnaire instrument using the Theory of Planned Behavior as the theoretical model. The translated Malay language version of PVASQ is reliable and valid to predict Malaysian patients' intention to adopt pharmacy value-added services to collect partial medicine supply.

  14. Development, test-retest reliability and validity of the Pharmacy Value-Added Services Questionnaire (PVASQ

    Directory of Open Access Journals (Sweden)

    Tan CL

    2015-09-01

    Full Text Available Objective: (i To develop the Pharmacy Value-Added Services Questionnaire (PVASQ using emerging themes generated from interviews. (ii To establish reliability and validity of questionnaire instrument. Methods: Using an extended Theory of Planned Behavior as the theoretical model, face-to-face interviews generated salient beliefs of pharmacy value-added services. The PVASQ was constructed initially in English incorporating important themes and later translated into the Malay language with forward and backward translation. Intention (INT to adopt pharmacy value-added services is predicted by attitudes (ATT, subjective norms (SN, perceived behavioral control (PBC, knowledge and expectations. Using a 7-point Likert-type scale and a dichotomous scale, test-retest reliability (N=25 was assessed by administrating the questionnaire instrument twice at an interval of one week apart. Internal consistency was measured by Cronbach’s alpha and construct validity between two administrations was assessed using the kappa statistic and the intraclass correlation coefficient (ICC. Confirmatory Factor Analysis, CFA (N=410 was conducted to assess construct validity of the PVASQ. Results: The kappa coefficients indicate a moderate to almost perfect strength of agreement between test and retest. The ICC for all scales tested for intra-rater (test-retest reliability was good. The overall Cronbach’ s alpha (N=25 is 0.912 and 0.908 for the two time points. The result of CFA (N=410 showed most items loaded strongly and correctly into corresponding factors. Only one item was eliminated. Conclusions: This study is the first to develop and establish the reliability and validity of the Pharmacy Value-Added Services Questionnaire instrument using the Theory of Planned Behavior as the theoretical model. The translated Malay language version of PVASQ is reliable and valid to predict Malaysian patients’ intention to adopt pharmacy value-added services to collect partial

  15. Training increases anabolic response and reduces inflammatory response to a single practice in elite male adolescent volleyball players.

    Science.gov (United States)

    Nemet, Dan; Portal, Shawn; Zadik, Zvi; Pilz-Burstein, Rutie; Adler-Portal, Dana; Meckel, Yoav; Eliakim, Alon

    2012-01-01

    We examined the effect of training on hormonal and inflammatory response to a single volleyball practice in elite adolescent players. Fourteen male, elite, national team-level, Israeli volleyball players (age, 16.3±1.1 years, Tanner stage 4-5) participated in the study. Blood samples were collected before and immediately after a typical 60-min volleyball practice, before and after 7 weeks of training during the initial phases of the volleyball season. Hormonal measurements included the anabolic hormones growth hormone (GH), insulin-like growth factor 1 (IGF-1), IGF-binding protein 3, and testosterone; the catabolic hormone cortisol; the pro-inflammatory markers interleukin (IL) 6, and the anti-inflammatory marker IL-1 receptor antagonist. Training led to a significant improvement of both anaerobic and aerobic properties. Before the training intervention, the typical volleyball practice was associated with a significant increase of GH and testosterone and also with a significant increase of IL-6. Training resulted in a significantly greater GH response (ΔGH, 2.5±2.4 vs. 4.7±3.0 ng/mL, before and after training, respectively; pvolleyball practice. The results suggest that, along with the improvement of anaerobic and aerobic characteristics, training leads to a greater anabolic and reduced inflammatory response to exercise.

  16. 40 CFR 799.5000 - Testing consent orders for substances and mixtures with Chemical Abstract Service Registry Numbers.

    Science.gov (United States)

    2010-07-01

    ... and mixtures with Chemical Abstract Service Registry Numbers. 799.5000 Section 799.5000 Protection of... Testing consent orders for substances and mixtures with Chemical Abstract Service Registry Numbers. This... adopted under 40 CFR part 790. Listed below in Chemical Abstract Service (CAS) Registry Number order...

  17. What prompts young adults in Ireland to attend health services for STI testing?

    LENUS (Irish Health Repository)

    Balfe, Myles

    2009-01-01

    BACKGROUND: In-depth understanding of the factors that prompt young adults to attend health services for sexually transmitted infection (STI) testing are needed to underpin sexual health programes. We conducted a qualitative study to identify and explore why young adults (18-29 years) in Ireland attended specialist and community health services for STI testing; the factors that supported\\/undermined their decisions to seek STI testing; and any factors that led to delay in seeking STI testing. METHODS: Semi-structured interviews with 30 adults (21 women, 9 men). Young adults were recruited from General Practice (GP) practices, Third Level College health services, Family Planning clinics and specialist STI treatment services for men who have sex with men (MSM). Interview questions examined why respondents decided to go for STI testing, whether they acted upon this desire immediately or decided to wait, and what they felt were important barriers\\/enablers to their health-seeking attempts. Interviews were thematically analyzed using standard qualitative techniques. RESULTS: Respondents sought STI testing for one of four reasons: they had reached a transitional moment in their lives (they were either about to stop using condoms with their sexual partner or were emerging from a period of their lives where they had a series of risky sexual relationships); they had had unprotected sex with a casual partner; they had symptoms of infection; and\\/or they were required to do so by their employer. Catalytic factors included media and government health promotion campaigns and knowing someone with an STI. However, many respondents delayed seeking testing. Reasons included respondents\\' concerns about stigma and that they would be judged by healthcare professionals, and feelings of invulnerability. Importantly, several respondents who waited up to four weeks to make an appointment after their initial decision to seek STI testing did not view this as delay. CONCLUSION: Sexual

  18. Wireless Roadside Inspection Phase II Tennessee Commercial Mobile Radio Services Pilot Test Final Report

    Energy Technology Data Exchange (ETDEWEB)

    Franzese, Oscar [ORNL; Lascurain, Mary Beth [ORNL; Capps, Gary J [ORNL; Siekmann, Adam [ORNL

    2011-05-01

    The Federal Motor Carrier Safety Administration (FMCSA) Wireless Roadside Inspection (WRI) Program is researching the feasibility and value of electronically assessing truck and bus driver and vehicle safety at least 25 times more often than is possible using only roadside physical inspections. The WRI program is evaluating the potential benefits to both the motor carrier industry and to government. These potential benefits include reduction in accidents, fatalities and injuries on our highways and keeping safe and legal drivers and vehicles moving on the highways. WRI Pilot tests were conducted to prototype, test and demonstrate the feasibility and benefits of electronically collecting safety data message sets from in-service commercial vehicles and performing wireless roadside inspections using three different communication methods. This report summarizes the design, conduct and results of the Tennessee CMRS WRI Pilot Test. The purpose of this Pilot test was to demonstrate the implementation of commercial mobile radio services to electronically request and collect safety data message sets from a limited number of commercial vehicles operating in Tennessee. The results of this test have been used in conjunction with the results of the complimentary pilot tests to support an overall assessment of the feasibility and benefits of WRI in enhancing motor carrier safety (reduction in accidents) due to increased compliance (change in motor carrier and driver behavior) caused by conducting frequent safety inspections electronically, at highway speeds, without delay or need to divert into a weigh station

  19. Testing and Integration of the Service Cylinders for the CMS Phase 1 pixel detector

    CERN Document Server

    Ngadiuba, Jennifer

    2016-01-01

    The present 3-layer CMS pixel detector will be replaced with a new 4-layer pixel system, referred to as Phase~1 upgrade, during the LHC extended technical stop in winter 2016/2017. The upgraded detector will allow to maintain the excellent tracking performance of CMS at the upcoming higher luminosity conditions at the LHC. The addition of an extra layer, closer to the beam pipe, demands a complete redesign of its services. The barrel pixel detector is attached to four half cylinders which carry the services along the beam pipe, accommodate the cooling lines and house the electronics for detector readout and control. The service cylinders are a complex system in design as well as in production due to the large number of channels and tight space requirements. In this document we present the design of the system and discuss the construction and testing of the service cylinders for the barrel pixel detector. Furthermore, we present results of the testing and calibrations carried out with a set of new digital dete...

  20. On the advantage of being left-handed in volleyball: further evidence of the specificity of skilled visual perception.

    Science.gov (United States)

    Loffing, Florian; Schorer, Jörg; Hagemann, Norbert; Baker, Joseph

    2012-02-01

    High ball speeds and close distances between competitors require athletes in interactive sports to correctly anticipate an opponent's intentions in order to render appropriate reactions. Although it is considered crucial for successful performance, such skill appears impaired when athletes are confronted with a left-handed opponent, possibly because of athletes' reduced perceptual familiarity with rarely encountered left-handed actions. To test this negative perceptual frequency effect hypothesis, we invited 18 skilled and 18 novice volleyball players to predict shot directions of left- and right-handed attacks in a video-based visual anticipation task. In accordance with our predictions, and with recent reports on laterality differences in visual perception, the outcome of left-handed actions was significantly less accurately predicted than the outcome of right-handed attacks. In addition, this left-right bias was most distinct when predictions had to be based on preimpact (i.e., before hand-ball contact) kinematic cues, and skilled players were generally more affected by the opponents' handedness than were novices. The study's findings corroborate the assumption that skilled visual perception is attuned to more frequently encountered actions.

  1. A Comparison of Jump Height, Takeoff Velocities, and Blocking Coverage in the Swing and Traditional Volleyball Blocking Techniques

    Directory of Open Access Journals (Sweden)

    Travis Ficklin

    2014-03-01

    Full Text Available The purpose of this study was to compare traditional and swing blocking techniques on center of mass (COM projectile motion and effective blocking area in nine healthy Division I female volleyball players. Two high-definition (1080 p video cameras (60 Hz were used to collect two-dimensional variables from two separate views. One was placed perpendicular to the plane of the net and the other was directed along the top of the net, and were used to estimate COM locations and blocking area in a plane parallel to the net and hand penetration through the plane of the net respectively. Video of both the traditional and swing techniques were digitized and kinematic variables were calculated. Paired samples t-tests indicated that the swing technique resulted in greater (p < 0.05 vertical and horizontal takeoff velocities (vy and vx, jump height (H, duration of the block (tBLOCK, blocking coverage during the block (C as well as hand penetration above and through the net’s plane (YPEN, ZPEN. The traditional technique had significantly greater approach time (tAPP. The results of this study suggest that the swing technique results in both greater jump height and effective blocking area. However, the shorter tAPP that occurs with swing is associated with longer times in the air during the block which may reduce the ability of the athlete to make adjustments to attacks designed to misdirect the defense.

  2. National Park Service - SRI - Soil Survey Geographic (SSURGO) for National Park Service Units (A-C TEST)

    Data.gov (United States)

    National Park Service, Department of the Interior — This data set was developed in conjunction with the U.S. Department of Agriculture, Natural Resources Conservation Service, and meets the standards and...

  3. 2010—2011年全国女排联赛天津、广东恒大队技战术分析%Skills and Tactics of Tianjin Volleyball Team and Guangdong Heng Volleyball Team in National Women's Volleyball League from 2010 to 2011

    Institute of Scientific and Technical Information of China (English)

    齐爽

    2012-01-01

    采用录像观察与数理统计等研究方法,对2010—2011年全国女子排球甲A联赛中天津队和广东恒大队的技战术进行分析。解析代表当今中国女排联赛最高水平球队的技战术打法,并在此基础上揭示我国甲A女排队伍技战术的发展走向,旨在为新一届中国女排尽快形成自己独特实用的技战术风格提供参考。%With the research methods of video observation and statistics,the paper analyses the skills and tactics of Tianjin volleyball team and Guangdong Heng volleyball team in National Women's Volleyball League from 2010 to 2011.The paper reveals the developing trend of the skills and tactics of the top level women volleyball teams in China so as to provide references for the Chinese women volleyball teams to form their practical skills and tactics.

  4. Service Oriented Robotic Architecture for Space Robotics: Design, Testing, and Lessons Learned

    Science.gov (United States)

    Fluckiger, Lorenzo Jean Marc E; Utz, Hans Heinrich

    2013-01-01

    This paper presents the lessons learned from six years of experiments with planetary rover prototypes running the Service Oriented Robotic Architecture (SORA) developed by the Intelligent Robotics Group (IRG) at the NASA Ames Research Center. SORA relies on proven software engineering methods and technologies applied to space robotics. Based on a Service Oriented Architecture and robust middleware, SORA encompasses on-board robot control and a full suite of software tools necessary for remotely operated exploration missions. SORA has been eld tested in numerous scenarios of robotic lunar and planetary exploration. The experiments conducted by IRG with SORA exercise a large set of the constraints encountered in space applications: remote robotic assets, ight relevant science instruments, distributed operations, high network latencies and unreliable or intermittent communication links. In this paper, we present the results of these eld tests in regard to the developed architecture, and discuss its bene ts and limitations.

  5. 对2014年世界女排大奖赛日本女排比赛成绩的探析%Analysis on the Results of Japanese Women's Volleyball Match in 2014 World Women's Volleyball Grand Prix

    Institute of Scientific and Technical Information of China (English)

    王文君

    2015-01-01

    Using the methods of literature, comparative analysis and video statistics, the historical breakthrough of the Japanese women's volleyball competition in the 2014 World Women's Volleyball Grand Prix was studied and the reasons were analyzed. Results show that the tactics of MB1, strong defensive ability ,individual and collective coordination is Japanese women's volleyball team win the 2014 FIVB World Grand Prix runner up key. However, Japanese women's volleyball team still in the net strength, height and strength and the other teams exists significant gaps. Through the analysis of the pros and cons of the Japanese women's volleyball skills and tactics, the aim is to provide reference and help for the future training and competition of the Chinese women's volleyball team.%运用文献资料、比较分析、录像统计等研究方法对2014年世界女排大奖赛日本女排比赛成绩的历史性突破进行研究并分析其原因。结果表明:MB1战术、超强的防守能力、个人和集体配合能力是日本女排夺取2014年世界女排大奖赛亚军的关键,然而日本女排仍在网上实力、身高、力量等方面与世界其它强队存在明显差距。通过分析日本女排技战术的得失优劣,旨在为中国女排今后的训练和比赛提供参考。

  6. Impact of Integrated Services on HIV Testing: A Nonrandomized Trial among Kenyan Family Planning Clients.

    Science.gov (United States)

    Church, Kathryn; Warren, Charlotte E; Birdthistle, Isolde; Ploubidis, George B; Tomlin, Keith; Zhou, Weiwei; Kimani, James; Abuya, Timothy; Ndwiga, Charity; Sweeney, Sedona; Mayhew, Susannah H

    2017-06-01

    The impact of integrated reproductive health and HIV services on HIV testing and counseling (HTC) uptake was assessed among 882 Kenyan family planning clients using a nonrandomized cohort design within six intervention and six "comparison" facilities. The effect of integration on HTC goals (two tests over two years) was assessed using conditional logistic regression to test four "integration" exposures: a training and reorganization intervention; receipt of reproductive health and HIV services at recruitment; a functional measure of facility integration at recruitment; and a woman's cumulative exposure to functionally integrated care across different facilities over time. While recent receipt of HTC increased rapidly at intervention facilities, achievement of HTC goals was higher at comparison facilities. Only high cumulative exposure to integrated care over two years had a significant effect on HTC goals after adjustment (aOR 2.94, 95%CI 1.73-4.98), and programs should therefore make efforts to roll out integrated services to ensure repeated contact over time. © 2017 The Population Council, Inc.

  7. The Effect of the Contrastive Training Using Weights and Plyometrics on the Development of the Vertical Jump Ability to Improve the Performance of the Smash for Volleyball Players

    Directory of Open Access Journals (Sweden)

    Zabchi Noreddine

    2016-03-01

    Full Text Available Considering training as a purposeful educational process that implies scientific planning for the sake of preparing the players, with their different physical, psychological and skill levels, to achieve the highest possible levels, it acquired a special character and was implemented into different important domains to achieve athletic goals at various levels for the development of motor performance. Many methods are used commonly by most of the trainers, and this led us, as researchers, to suggest a training programme that is based on the use of a contrastive training method using weights and plyometrics to achieve the highest degrees of efficiency, through using strength in different and opposite ways within the training unit or within a set of exercises, while trying to contribute to the clarification of this way for all types, in general, and applying it with the volleyball students as a sample representing the research community. The research process is meant to be conducted through pre and post tests on two groups; one as the control group and the other pilot. The first sample group underwent a programme established under the supervion of the professor of the subject, while the second underwent the suggested programme. Ultimately we found out through the statistical analysis of the results the existence of significant statistical differences between the pre and post tests in favour of the pilot group on the account of the control one. Researchers attribute these results to the impact of the suggested contrastive training using weights and plyometrics, which leads to the improvement of the ability to jump through bridging the gap between strength training and speed, using the so-called reactive prolongation which facilitates and adapts the additional kinetic units in the muscles during the performance, and gains muscle elasticity, and thus the development of vertical jumping ability, which contributes to the improvement of the smash skill in

  8. An analysis of float service life test data of VRLA batteries

    Energy Technology Data Exchange (ETDEWEB)

    Burgess, W.L. [Exide Electronics, Raleigh, NC (United States)

    1998-09-01

    This paper describes a statistical method for analyzing data from float service life tests of VRLA batteries. The purpose of this work was to develop a model with the following characteristics. First, it would allow test data from different batteries and test conditions to be pooled, as long as they were from the same design. Secondly, it would provide estimates at discharge rates other than the ones actually used in the test. Finally, it was desired for the model to be able to predict the time to various capacities of interest to a better resolution than the typical 3-5 years to 80% (of rated) capacity given by the battery manufacturers. The batteries in this analysis are valve regulated lead acid (VRLA) types, ranging in capacity from 4 Ah to 17 Ah, from two manufacturers. The float service life of a battery will be divided into two distinct time periods. The first being that time, from the beginning of the test, when the capacity of the battery is relatively constant. The second period is defined as that when the battery capacity begins to decrease much more rapidly until end of life is reached. (orig.)

  9. A Comparison of Women's Collegiate and Girls' High School Volleyball Injury Data Collected Prospectively Over a 4-Year Period.

    Science.gov (United States)

    Reeser, Jonathan C; Gregory, Andrew; Berg, Richard L; Comstock, R Dawn

    2015-01-01

    There is a relative paucity of research examining the sport-specific injury epidemiology of high school and collegiate volleyball athletes. Moreover, differences in study methodology frequently limit our ability to compare and contrast injury data collected from selected populations. There are differences between the injury patterns characteristic of high school and collegiate female volleyball athletes. Retrospective clinical review. Level 3. We statistically analyzed injury incidence and outcome data collected over a 4-year interval (2005-2006 to 2008-2009) by 2 similar injury surveillance systems, the National Collegiate Athletic Association's Injury Surveillance System (NCAA ISS) and the High School Reporting Injuries Online (HS RIO). We compared diagnoses, anatomic distribution of injuries, mechanisms of injury, and time lost from training or competition between high school and collegiate volleyball athletes. The overall volleyball-related injury rate was significantly greater among collegiate athletes than among high school athletes during both competition (injury rate ratio, 2.9; 95% CI, 2.5-3.4) and practice (injury rate ratio, 3.5; 95% CI, 3.1-3.9). Collegiate athletes had a higher rate of ankle sprain, knee injury, and shoulder injury. Concussions represented a relatively high percentage of injuries in both populations (5.0% of total NCAA ISS injuries vs 4.8% of total HS RIO injuries, respectively). The data suggest that although similar, there were distinct differences between the injury patterns of the 2 populations. Compared with high school volleyball players, collegiate athletes have a higher rate of acute time loss injury as well as overuse time loss injury (particularly patellar tendinosis). Concussions represented a significant and worrisome component of the injury pattern for both study populations. The injury data suggest that important differences exist in the injury patterns of female high school compared with collegiate volleyball athletes

  10. Development, testing and implementation of an emergency services methodology in Alberta.

    Science.gov (United States)

    Eliasoph, H; Ashdown, C

    1995-01-01

    Alberta was the first province in Canada to mandate reporting of hospital-based emergency services. This reporting is based on a workload measurement system that groups emergency visits into five discreet workload levels/classes driven by ICD-9-CM diagnoses. Other related workload measurement variables are incorporated, including admissions, transfers, maintenance monitoring, nursing and non-nursing patient support activities, trips, staff replacement, and personal fatigue and delay. The methodology used to design the reporting system has been subjected to extensive testing, auditing and refinement. The results of one year of province-wide data collection yielded approximately 1.5 million emergency visits. These data reveal consistent patterns/trends of workload that vary by hospital size and type. Although this information can assist in utilization management efforts to predict and compare workload and staffing levels, the impetus for establishing this system derived from its potential for funding hospital-based emergency services. This would be the first time that such services would be funded on a systemic, system-wide basis whereby hospitals would be reimbursed in relation to workload. This proposed funding system would distribute available funding in a consistent, fair and equitable manner across all hospitals providing a similar set of services, thus achieving one of the key goals of the Alberta Acute Care Funding Plan. Ultimately, this proposed funding methodology would be integrated into a broader Ambulatory Care Funding system currently being developed in Alberta.

  11. Service quality in banking: developing and testing measurement instrument with Latvian sample data

    Directory of Open Access Journals (Sweden)

    Jelena Titko

    2013-01-01

    Full Text Available The paper highlights the importance of managing service quality in banking that can positively affect customer satisfaction. The goal of the given study is to develop an instrument for measuring service quality perceived by Latvian banks’ retail customers and to determine the most important contributors to customer satisfaction. To achieve this purpose, randomly selected customers of Latvian banks were surveyed, using the authors’ developed questionnaire. The proposed instrument was tested for reliability and validity, using techniques of confirmatory factor analysis. Exploratory factor analysis yielded five service quality dimensions (factors that allowed constructing customer satisfaction factor model EPICA: E – expenses, P – product, I – image, C – competence and emotional intellect, A – access. The subsequent correlation analysis revealed that the strongest relationship is between customer satisfaction and C factor. The results of the current research are crucially important for Latvian banks’ executives because the majority of previous studies in the related field offered measurement scales adequate for measuring service quality in other industries. Besides, the proposed questionnaire is exclusively developed for Latvia and considers Latvian banking sector specifics.

  12. Beach Volleyball Athletes' Core Strength Training%沙滩排球运动员核心力量训练

    Institute of Scientific and Technical Information of China (English)

    洪丽娜

    2012-01-01

    阐述沙滩排球运动员竞赛所需的核心力量,结合沙滩排球的专项特点,介绍几种沙滩排球运动员基本的核心力量练习动作,提出在训练计划中安排核心力量训练的建议。%The paper elaborated the core strength beach volleyball athletes required,combined with the special characteristics of beach volleyball,introduced several basic core strength exercises,and proposed advice on schedules of core strength training.

  13. Problems and prospects of use volleyball as a tool for improvement of physical condition general education schools pupils

    Directory of Open Access Journals (Sweden)

    Prozar N.V.

    2010-05-01

    Full Text Available The state of problem and prospect of the use of volleyball is considered for the decision of educational tasks and improvement of bodily condition of students. The process of physical education of students is investigational 4-5 classes of general educational establishment. Attention in the presence of motor low-density of most lessons of physical education is accented. The necessity of introduction of new technology of forming students playing volleyball skills is grounded. Technology takes into account alternative traditional approaches and directed on the improvement of bodily condition of students in the process of physical education.

  14. Simulated Service and Stress Corrosion Cracking Testing for Friction Stir Welded Spun Formed Domes

    Science.gov (United States)

    Stewart, Thomas J.; Torres, Pablo D.; Caratus, Andrei A.; Curreri, Peter A.

    2010-01-01

    Simulated service testing (SST) development was required to help qualify a new 2195 aluminum lithium (Al-Li) alloy spin forming dome fabrication process for the National Aeronautics and Space Administration (NASA) Exploration Development Technology Program. The application for the technology is to produce high strength low weight tank components for NASA s next generation launch vehicles. Since plate material is not currently manufactured large enough to fabricate these domes, two plates are joined by means of friction stir welding. The plates are then pre-contour machined to near final thicknesses allowing for a thicker weld land and anticipating the level of stretch induced by the spin forming process. The welded plates are then placed in a spin forming tool and hot stretched using a trace method producing incremental contours. Finally the dome receives a room temperature contour stretch to final dimensions, heat treatment, quenching, and artificial aging to emulate a T-8 condition of temper. Stress corrosion cracking (SCC) tests were also performed by alternate immersion in a sodium chloride (NaCl) solution using the typical double beam assembly and with 4-point loaded specimens and use of bent-beam stress-corrosion test specimens under alternate immersion conditions. In addition, experiments were conducted to determine the threshold stress intensity factor for SCC (K(sub ISCC)) which to our knowledge has not been determined previously for Al-Li 2195 alloy. The successful simulated service and stress corrosion testing helped to provide confidence to continue to Ares 1 scale dome fabrication

  15. Jump frequency may contribute to risk of jumper's knee: a study of interindividual and sex differences in a total of 11,943 jumps video recorded during training and matches in young elite volleyball players.

    Science.gov (United States)

    Bahr, Martin A; Bahr, Roald

    2014-09-01

    Male sex, total training volume (number of hours per week) and match exposure (number of sets played per week) are risk factors for jumper's knee among young elite volleyball players. However, it is not known whether jump frequency differs among players on the same squad. To examine interindividual and sex differences in jump frequency during training and matches in young elite volleyball players. Observational study. Norwegian elite volleyball boarding school training programme. Student-athletes (26 boys and 18 girls, 16-18 years). Individual jump counts were recorded based on visual analysis of video recordings obtained from 1 week of volleyball training (9 training sessions for boys and 10 for girls, 14.1 h and 17.8 h of training, respectively) and 10 matches (5.9 h for boys (16 sets) and 7.7 h for girls (21 sets). A total of 11,943 jumps were recorded, 4138 during matches and 7805 during training. As training attendance and jump frequency varied substantially between players, the total exposure in training ranged from 50 to 666 jumps/week among boys and from 11 to 251 jumps/week among girls. On average, this corresponded to 35.7 jumps/h for boys and 13.7 jumps/h for girls (Student t test, p=0.002). Total jump exposure during matches ranged between 1 and 339 jumps among boys and between 0 and 379 jumps among girls, corresponding to an average jump frequency of 62.2 jumps/h for boys and 41.9 jumps/h for girls (Student t test, pvolleyball players. Total jump volume may represent a more important risk factor for jumper's knee than total training volume, warranting further research attention. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

  16. Comparison of hydrogen trapping/tensile testing correlations with field service results for alloy K-500

    Energy Technology Data Exchange (ETDEWEB)

    Pound, B.G. [Exponent Failure Analysis Associates, Menlo Park, CA (United States)

    1999-11-01

    Failures of alloy K-500 (UNS N05500) components in seawater and sour gas applications have been attributed to hydrogen embrittlement (HE). Use of an appropriate heat treatment to decrease the hardness of alloy K-500 has been reported to reduce the likelihood of HE. In this paper, field service results given in the literature were compared with correlations between irreversible hydrogen trapping parameters and literature data from tensile tests for alloy K-500 with different heat treatments. The laboratory tests pointed to annealing, rather than hardness, as the critical factor in the irreversible trapping behavior and HE susceptibility of aged alloy K-500. The test data indicated that an increase in trapping capacity produced by annealing leads to an increase in HE susceptibility. The difference between the laboratory and field data was explained on the basis of a brittle outer layer known to be present in alloy K-500 at high concentrations of hydrogen.

  17. QA and Testing in CERNBOX: the cornerstone of service development and operation

    CERN Document Server

    CERN. Geneva

    2015-01-01

    QA and Testing in CERNBOX (https://cernbox.cern.ch) presents a serious challenge and is critically important: - the service deals with user data directly on their local computers (synchronization clients), at present ~1000 clients connecting daily - the very nature of synchronization is to propagate changes across computers which also means propagating problems if they occur - there is a wide range of supported platforms (MacOSX, Windows, major Linux distributions, mobile platforms) - OS semantics are often incompatible or conflicting: for example HFS is case preserving, NTFS supports the legacy of 8.3 DOS file format, etc. - the operational environment varies enormously, for example: from fast, reliable network inside computing center to unreliable, high-latency, ad-hoc connections from airports - etc. From service development perspective, CERNBOX integrates several complex components which development cycles are disjoint and geographically distributed: - PB-range storage backend (EOS) developed...

  18. 2008年北京奥运会女子排球赛4强进攻能力对比分析%Comparative Analysis on Attacking Ability of Top 4 Woman Volleyball Teams in 2008 Beijing Olympic Games

    Institute of Scientific and Technical Information of China (English)

    史友宽; 张岩

    2009-01-01

    采用文献资料调研和录像观察法,对2008年北京奥运会女子排球比赛4强的进攻能力进行分析.结论:巴西队和古巴队扣球进攻能力相对较强,其中,巴西队的进攻更为稳定;现代排球运动的发展更重视接应运动员的进攻作用;巴西队的拦网能力一枝独秀;中国队在发球的进攻性和稳定性的平衡上做得最好;美国队发球进攻能力不足,失误率较高.%Through using the methods of literature review and video observation, this paper studied the attacking ability of top 4 woman volleyball teams in 2008 Beijing Olympic Games. Conclusion: the spike ability of Brazil and Cuba team is relative strength, in which the Brazil team' offense is more stable. The development of modern volleyball pays more attention to the role of the attack. The block ability of Brazil team is the best, while the Chinese team is in the favorite of offensive and stability. American women team is lack of service attack with high failure rate.

  19. EFFECT OF GENDER DIFFERENCE AND CIRCADIAN RHYTHM ON TOTAL MOOD DISTURBANCE OF VOLLEYBALL PLAYERS

    Directory of Open Access Journals (Sweden)

    Rajagopal I

    2012-08-01

    Full Text Available The purpose of the study was to find out the effect of gender difference and circadian rhythm on total mood disturbance (TMD for volleyball players. METHODS: To achieve the purpose, a total of thirty volleyball players [men (n = 15 and women (n = 15] age between 19 years and 22 years from Einstein College of Engineering, Tamil Nadu, India were selected as subjects. The two independent variables of gender and circadian variations and dependent variable of total mood disturbance were selected for this study. The experimental design used was static group factorial design. The data were collected at 02:00, 06:00, 10:00, 14:00, 18:00 and 22:00 hours on total mood disturbance by using profile of mood state (POMS questionnaire during the academic year of 2009 – 2010. Collected data were subjected to statistical analysis by using two-way factorial (2 x 6 Analysis of Variance (ANOVA and Cosinor analysis. RESULTS: 1 There was significant difference in total mood disturbance between genders, 2 significant difference in total mood disturbance at different times of the day irrespective of gender status and 3 significant difference in total mood disturbance for men and women volleyball players at different times of the day. 4 Significant circadian rhythmicity exists on total mood disturbance for women and 5 Insignificant circadian rhythmicity exists on total mood disturbance for men. CONCLUSION: It is recommended to the physical educators to adopt the findings of this study while planning to improve sports skills for the players and athletes.

  20. The Characteristic of Energy Metabolism and Nutritional Supplement of Volleyball Athletes

    Directory of Open Access Journals (Sweden)

    Liping Zhang

    2015-05-01

    Full Text Available Substantial metabolism and energy metabolism is the base of the normal operation for every organ. Nutrition arrangement instructed by the knowledge about the regularities of metabolism is very significant. The purpose of the presented study was the examination of nutrition intake influence on energy metabolism in young volleyball players. The study was performed in twenty four 16-18 years old male volleyball players in the competition period. Subjects were divided into 2 groups, depending on the calcium intake: more than 1300 mg/day in the first group (13 athletes; and less than 1300 mg/day in the second group (11 athletes. The nutrition mode assessment was based on the 24-h dietary history using the recall method. In the blood serum concentrations of osteocalcin, alkaline phosphatase (bALP, C-terminal telopeptide of collagen I (ICTP, insulin-like growth factor-1 (IGF-1, insulin-like-growth factor-binding protein-3 (IGFBP-3, growth hormone (hGH and ionized calcium and magnesium were determined. Statistical analysis showed significant differences between both groups investigated in respect to the calcium (p<0.01 and protein (p<0.05 intake and the bALP and (IGFBP-3 concentrations (p<0.05. The results of the study led us to conclude that low calcium and protein intake together with systematic sport activity negatively influenced the bone formation level. At last to improve the capacity of sports man we give some advice such as the methods of volleyball train and supplying some nutrient matter in the training.

  1. 不同材质的排球在垫球教学中的实验研究%Teaching experimental research of different materials in volleyball digs

    Institute of Scientific and Technical Information of China (English)

    王琳琳

    2014-01-01

    In general college volleyball teaching ,using different teaching materials volleyball comparison experiments were performed volleyball teaching hard and soft volleyball ,volleyball hard ball first pad combines teaching ,experiment two weeks ,the fourth week of the study results were compared .The results showed that soft and hard volleyball teaching effec-tiveness of combining was better ,especially in the early stages of teaching ,soft and hard volleyball combined student mas-tery of technical mat ball effect was obvious advantages .Recommend the use of soft and hard volleyball method of combining teaching in volleyball digs.%在大学生排球垫球教学中,运用不同材质的排球进行教学实验对比,分别采用硬式排球教学和软式排球、硬式排球相结合的教学,实验的第二周、第四周对学习的效果进行对比。结果表明:软式、硬式排球相结合的教学效果较好,特别是在教学的初期阶段,软式、硬式排球相结合,非常有利于学生掌握垫球技术。建议在垫球教学中采用软式排球与硬式排球相结合的方法。

  2. Orion MPCV Service Module Avionics Ring Pallet Testing, Correlation, and Analysis

    Science.gov (United States)

    Staab, Lucas; Akers, James; Suarez, Vicente; Jones, Trevor

    2012-01-01

    The NASA Orion Multi-Purpose Crew Vehicle (MPCV) is being designed to replace the Space Shuttle as the main manned spacecraft for the agency. Based on the predicted environments in the Service Module avionics ring, an isolation system was deemed necessary to protect the avionics packages carried by the spacecraft. Impact, sinusoidal, and random vibration testing were conducted on a prototype Orion Service Module avionics pallet in March 2010 at the NASA Glenn Research Center Structural Dynamics Laboratory (SDL). The pallet design utilized wire rope isolators to reduce the vibration levels seen by the avionics packages. The current pallet design utilizes the same wire rope isolators (M6-120-10) that were tested in March 2010. In an effort to save cost and schedule, the Finite Element Models of the prototype pallet tested in March 2010 were correlated. Frequency Response Function (FRF) comparisons, mode shape and frequency were all part of the correlation process. The non-linear behavior and the modeling the wire rope isolators proved to be the most difficult part of the correlation process. The correlated models of the wire rope isolators were taken from the prototype design and integrated into the current design for future frequency response analysis and component environment specification.

  3. CUE USAGE IN VOLLEYBALL: A TIME COURSE COMPARISON OF ELITE, INTERMEDIATE AND NOVICE FEMALE PLAYERS

    Science.gov (United States)

    Vaeyens, R; Zeuwts, L; Philippaerts, R; Lenoir, M

    2014-01-01

    This study compared visual search strategies in adult female volleyball players of three levels. Video clips of the attack of the opponent team were presented on a large screen and participants reacted to the final pass before the spike. Reaction time, response accuracy and eye movement patterns were measured. Elite players had the highest response accuracy (97.50 ± 3.5%) compared to the intermediate (91.50 ± 4.7%) and novice players (83.50 ± 17.6%; pvolleyball and suggests that expert players extract more information from parafoveal regions. PMID:25609887

  4. Thoracic Outlet Syndrome in a Volleyball Player Due to Nonunion of the First Rib Fracture.

    Science.gov (United States)

    Puttmann, Kathleen T; Satiani, Bhagwan; Vaccaro, Patrick

    2016-11-01

    Fracture of the first rib with ensuing callus formation is a rare cause of thoracic outlet syndrome. We report a case of a 17-year-old female volleyball player who presented with months of chronic arm pain. Radiographic imaging demonstrated nonunion fracture of the first rib. Physical therapy had been unsuccessful in relieving the pain, and surgical management was performed with resection of the first rib through a transaxillary approach with complete resolution of symptoms. Inflammation surrounding such fractures may destroy tissue planes, making dissection more technically difficult.

  5. Psychological features of youths at a selection to beach volley-ball

    Directory of Open Access Journals (Sweden)

    Samoday V.

    2010-04-01

    Full Text Available The psychological features of young sportsmen are considered on the initial stage of sporting preparation. The dynamics of mental condition of youths is certain from beach volley-ball on the stage of sporting selection. 25 young sportsmen of groups of initial preparation took part in research. Middle age of young sportsmen made 12 years. On the indexes of self-appraisal of mental condition at swingeing majority of youths exposed a few the overextension of feel, activity and location of spirit. On the psychological indexes of concentration, the middle level of their development is set firmness and concentration of attention.

  6. Standard Test Method for Mechanical Hydrogen Embrittlement Evaluation of Plating/Coating Processes and Service Environments

    CERN Document Server

    American Society for Testing and Materials. Philadelphia

    2010-01-01

    1.1 This test method describes mechanical test methods and defines acceptance criteria for coating and plating processes that can cause hydrogen embrittlement in steels. Subsequent exposure to chemicals encountered in service environments, such as fluids, cleaning treatments or maintenance chemicals that come in contact with the plated/coated or bare surface of the steel, can also be evaluated. 1.2 This test method is not intended to measure the relative susceptibility of different steels. The relative susceptibility of different materials to hydrogen embrittlement may be determined in accordance with Test Method F1459 and Test Method F1624. 1.3 This test method specifies the use of air melted AISI E4340 steel per SAE AMS-S-5000 (formerly MIL-S-5000) heat treated to 260 – 280 ksi (pounds per square inch x 1000) as the baseline. This combination of alloy and heat treat level has been used for many years and a large database has been accumulated in the aerospace industry on its specific response to exposure...

  7. Novel field test design for acquisition of DC and AC parameters during service

    DEFF Research Database (Denmark)

    Thorsteinsson, Sune; Poulsen, Peter Behrensdorff; Schou, Jørgen;

    2016-01-01

    potential for more. In this work we describe a field test design where the modules are operating at their maximum power point, and via relays is switched out one by one for acquisition of an IV curve and an impedance spectrum. Some of the modules involved will undergo stimuli to accelerate certain......Being able to monitor early signs of PV module degradation, is needed to ensure stable power production throughout the service life of a PV installation. Recently, impedance spectroscopy is proven to be a useful tool for detection of the presence and location of significant errors, and may have...

  8. Market structure and the role of consumer information in the physician services industry: an empirical test.

    Science.gov (United States)

    Wong, H S

    1996-04-01

    This paper applies Panzar and Rosse's (1987) econometric test of market structure to examine two long-debated issues: What is the market structure for physician services? Do more physicians in a market area raise the search cost of obtaining consumer information and increase prices (Satterthwaite, 1979, 1985)? For primary care and general and family practice physicians, the monopolistically competitive model prevailed over the competing hypotheses--monopoly, perfect competition, and monopolistic competition characterized by consumer informational confusion. Although less conclisive, there is some evidence to support the monopolistically competitive model for surgeons and the consumer informational confusion model for internal medicine physicians.

  9. 谈高校培养大学生业余排球裁判%Cultivation of Student Amateur Volleyball Referee in College

    Institute of Scientific and Technical Information of China (English)

    白玉雪

    2014-01-01

    排球是高校普遍开展的运动项目,培养学生排球裁判员不仅可以缓解教师裁判不足的矛盾,还可以使学生获得更多的排球知识和技能,更好地为社会服务。%Volleyball is a sport generally carried out in college. Student volleyball referee not only can alleviate the contradiction of shortage of teacher referee, but also can enable students to gain more knowledge and skills of volleyball and better serve the community.

  10. 浅谈高校排球教学中学生排球意识的培养研究%Study on the Cultivation of Students' Consciousness of Volleyball in University Volleyball Teaching

    Institute of Scientific and Technical Information of China (English)

    钱子君

    2014-01-01

    排球意识是运动员发出正确动作指令的基础,在实际运用中起到指挥行动,布置战术等方面的重要作用。本文主要说明了排球意识的主要培养方向,对目前高校排球教学中排球意识培养中存在的问题进行了分析,并且提出了几点解决方法,希望能够对学生排球意识的养成起到帮助作用。%Volleyball consciousness is the basis for correct action instructions, playing an important role in directing actions and arranging tactics. This paper mainly explains the main direction of cultivating volleyball consciousness, analyzes the current problems existing in the cultivation of volleyball consciousness, and puts forward some solutions, hoping to benefit the develop-ment of students' volleyball consciousness.

  11. Technical and Tactical Analysis of Shanghai Women's Volleyball Team in the National Volleyball League%上海女排参加全国排球联赛技战术分析

    Institute of Scientific and Technical Information of China (English)

    张立明

    2011-01-01

    Based on the technical statistics of the 2006-2007 and 2007-2008 National Women's Volleyball League, the article analyzes the technical and tactical changes of Shanghai Women's Volleyball Team in those competitions so as to find out its deficiencies as compared with the other strong teams. It discusses the different skills and tactiacs that can be used by Shanghai Women's Volleyball Team in competition in order to provide reference to the training of Shanghai Women's Volleyball Team.%通过对2006-2007和2007-2008年全国女子排球联赛以技术统计进行比较研究,分析上海女排这两个年度在比赛过程中技战术上的变化情况,寻找与其他强队的差距,从而探讨上海女排比赛时的各种技战术因素,并为上海女排今后的技战术发展提供训练上的依据。

  12. Appraising Pre-service EFL Teachers' Assessment in Language Testing Course Using Revised Bloom's Taxonomy

    Directory of Open Access Journals (Sweden)

    Elham Mohammadi

    2015-07-01

    Full Text Available The teachers need to be conceived as a “change agent” and not as a mere transmitter of knowledge and culture. In developing countries like Iran, one of the most significant concerns in the field of teachers’ education is efficiency of pre-service programs. To this aim, the current descriptive-evaluative study intended to describe the state of pre-service teachers' assessment in the field of language testing by (a examining the exam questions to find out whether they are aligned with curriculum objectives and syllabus (content validity, (b exploring whether they take care of higher order cognitive processes and (c finding what combinations of cognitive process levels and knowledge types in Revised Bloom's Taxonomy are prevalent in the questions. The results exhibited an unbalanced coverage of content in exams. Also the questions were found to be inadequate in terms of measuring complex cognitive skills (Analyze and Evaluate; Remember and Understand domains take up 91.6 % of all questions and no item was found for Create. Three combinations of cognitive process level and knowledge type was dominant in the data set: (1 Remember Factual Knowledge, (2 Understand Conceptual Knowledge, and (3 Apply Procedural Knowledge. These associations confirm the Anderson and Krathwohl's (2001 proposition. Keywords: pre-service teachers, assessment, assessment literacy, Revised Bloom's Taxonomy, cognitive processes, knowledge types

  13. Service Lifetime Estimation of EPDM Rubber Based on Accelerated Aging Tests

    Science.gov (United States)

    Liu, Jie; Li, Xiangbo; Xu, Likun; He, Tao

    2017-02-01

    Service lifetime of ethylene propylene diene monomer (EPDM) rubber at room temperature (25 °C) was estimated based on accelerated aging tests. The study followed sealing stress loss on compressed cylinder samples by compression stress relaxation methods. The results showed that the cylinder samples of EPDM can quickly reach the physical relaxation equilibrium by using the over-compression method. The non-Arrhenius behavior occurred at the lowest aging temperature. A significant linear relationship was observed between compression set values and normalized stress decay results, and the relationship was not related to the ambient temperature of aging. It was estimated that the sealing stress loss in view of practical application would occur after around 86.8 years at 25 °C. The estimations at 25 °C based on the non-Arrhenius behavior were in agreement with compression set data from storage aging tests in natural environment.

  14. Dynamic load indicators for take-off-landing sequence in blocks and attacks of elite female volleyball players.

    Science.gov (United States)

    Kabaciński, Jarosław; Dworak, Lechosław Bogdan; Murawa, Michał; Rzepnicka, Agata

    2016-01-01

    Dynamic loads during landings determined by the ground reaction forces (GRFs) may elaborate internal loads and increase the risk of overload knee injuries as a result of performing volleyball jumps many times. The study dealt with a biomechanical assessment of dynamic load indicators in female volleyball players for the motion sequence of take-off-landing in blocks and attacks. Twelve professional female volleyball players participated in the study. Blocks and attacks were filmed by two cameras. GRFs vs. time graphs were recorded with the use of a force platform. Values of dynamic load indicators in terms of the relations of peak of vertical component of GRF, build-up index of this force (BIF), and power output (P) during landing to the vGRF, BIF and P during take-off (L/T) were calculated. The statistically significant ( p spikes: 2.4 (vGRF), 12.2 (BIF) and 3.1 (P). In the case of blocks, slide attack spikes and attack line spikes, results of these variables were in range: 1.8÷2.1, 5.9÷7.6 and 2.1÷2.9, respectively. The reduction of GRFs during landings contributes to decreasing the level of the load indicators L/T which should minimize the incidence of anterior cruciate ligament and patellar tendon injuries in female volleyball players.

  15. Plyometric type neuromuscular exercise is a treatment to postural control deficits of volleyball players: A case study

    Directory of Open Access Journals (Sweden)

    A. Asadi

    2016-06-01

    Conclusions: It can be recommend that strength and conditioning professionals in the field of volleyball do not perform other type of landing exercise in plyometric training sessions because of postural control impaired and consequently the probability of lower extremity injuries will increase.

  16. Vascular Endothelial Growth Factor Receptor-2 Polymorphisms Have Protective Effect against the Development of Tendinopathy in Volleyball Athletes.

    Science.gov (United States)

    Salles, José Inácio; Duarte, Maria Eugenia Leite; Guimarães, João Matheus; Lopes, Lucas Rafael; Vilarinho Cardoso, Jessica; Aguiar, Diego Pinheiro; Machado Neto, João Olyntho; Machado, Daniel Escorsim; Perini, Jamila Alessandra

    2016-01-01

    The aim of the study was to investigate whether genetic variants in VEGF and KDR genes can be correlated with susceptibility of tendinopathy in volleyball athletes. This study was conducted at the Brazilian Volleyball Federation, and comprised 179 volleyball athletes: 88 had a confirmed diagnosis of tendinopathy (cases), whereas 91 had no evidence of the disease (controls). The VEGF (-2578C>A, -460T>C and +936C>T) and KDR (-604C>T, 1192G>A and 1719T>A) polymorphisms were determined by TaqMan real-time polymerase chain reaction. The odds ratio (OR) with their 95% confidence intervals (CI) were calculated using an unconditional logistic regression model. The evaluation of demographic and clinical characteristics revealed the athlete age (P volleyball (P T, 1192G>A and 1719T>A) haplotypes CGA and CAT were associated with decreased tendinopathy risk (OR: 0.46, 95% CI: 0.21-0.99 and OR: 0.23, 95% CI: 0.07-0.76, respectively). With regards to pain, traumatic lesion and away from training due to injury, VEGF and KDR polymorphisms were not associated with clinical symptoms complaints. The present results provide evidence that the KDR polymorphisms were associated with development of tendinopathy, and can contribute to identify new therapeutic targets or personalized training programs to avoid tendinopathy development in athletes.

  17. Proficiency Assessment of Male Volleyball Teams of the 13-15-Year Age Group at Estonian Championships

    Science.gov (United States)

    Stamm, Meelis; Stamm, Raini; Koskel, Sade

    2008-01-01

    Study aim: Assessment of feasibility of using own computer software "Game" at competitions. Material and methods: The data were collected during Estonian championships in 2006 for male volleyball teams of the 13-15-years age group (n = 8). In all games, the performance of both teams was recorded in parallel with two computers. A total of…

  18. Analysis of the relationship between the amount of training and cognitive expertise. A study of young volleyball players.

    Science.gov (United States)

    Gil, Alexander; Moreno, M Perla; Moreno, Alberto; García-González, Luís; Claver, Fernando; Del Villar, Fernando

    2013-03-01

    The main goal of this research was to analyze the relationship between the amount of practice accumulated in training and the level of cognitive expertise achieved by volleyball players who are still in training. Another goal was to determine the number of training hours per week needed to improve knowledge significantly. The study's sample was composed of 520 volleyball players between the ages of 12 and 16 years. The independent variable was the amount of training, defined as the number of weekly hours that the volleyball player devoted to training. The dependent variable was cognitive expertise, measured by declarative knowledge and procedural knowledge. A univariate analysis of variance was done to examine the relationship between the number of weekly hours and the declarative and procedural knowledge reached by volleyball players in the athletic formation training stages. Statistical significance was set at p < 0.05. There were significant differences in knowledge according to the number of weekly training hours (p < 0.001). These results confirm that there is a relationship between the quantity of practice and the development of cognitive expertise. It is recommended that young players dedicate at least 4 hours weekly to training to achieve a significant improvement in cognitive expertise.

  19. Nutritional analysis of dietary intake of professional female volleyball players during the competitive phase of the regular season

    Directory of Open Access Journals (Sweden)

    Juan Mielgo-Ayuso

    2013-03-01

    Full Text Available Introduction: nutritional aspects women’s volleyball has been little studied and more in a specific period of training as the competitive period. The aim is to assess and know the caloric and macronutrients intake by professional volleyball players of the Spanish Superliga for 16 weeks of training for the competition phase and compare with the references marked for athlete population.Material and methods: the study included 10 female volleyball players (JVF (26.6±5.9 years and height 178.05±8.7cm, for a total of 16 weeks of training and competition. They all gave written informed consent. They completed a food intake frequency questionary of the 16 week study, data corroborated by a dietary record (CFCA of 7 consecutive days in week 9 and 16. We were calculated daily nutritional intake from CFCA with the food composition table of CESNID by Easy Diet software, the Spanish Association of Dietitians-Nutritionists (AEDN.Results: the energy and nutritional analysis of the female professional volleyball players shows that the amount of energy and macronutrients does not meet to the recommendations for sports collective.Conclusions: it is observed low energy and carbohydrates intake and high intake of protein and lipids. Recommended practical aspects for improving nutrition education in this professional sports group.

  20. Correlations of dominant handgrip strength with selected anthropometric and physiological characteristics in inter-university volleyball players

    Directory of Open Access Journals (Sweden)

    Shyamal Koley

    2012-01-01

    Full Text Available The purpose of the present study was to estimate the dominant handgrip strength and its correlations with selected anthropometric and physiological characteristics in inter-university volleyball players. Three anthropometric characteristics, four body composition parameters, two physical and two physiological characteristics were measured on randomly selected 63 inter-university volleyball players (38 males and 25 females aged 18.25 years from six Indian universities, competition was held in Guru Nanak Dev University, Amritsar, Punjab, India. An adequate number of controls (n = 102, 52 males and 50 females were also taken from the same place for comparisons. In results, one way analysis of variance showed significant (p . .004 - .000 differences in all the variables between volleyball players and controls. In volley players, significantly positive correlations were found between right and left handgrip strength and all the variables studied except percent body fat (where the correlations were significantly negative. It may be concluded that dominant handgrip strength had some strong positive correlations with all the variables studied in inter-university volleyball players.

  1. Proficiency Assessment of Male Volleyball Teams of the 13-15-Year Age Group at Estonian Championships

    Science.gov (United States)

    Stamm, Meelis; Stamm, Raini; Koskel, Sade

    2008-01-01

    Study aim: Assessment of feasibility of using own computer software "Game" at competitions. Material and methods: The data were collected during Estonian championships in 2006 for male volleyball teams of the 13-15-years age group (n = 8). In all games, the performance of both teams was recorded in parallel with two computers. A total of…

  2. Vascular Endothelial Growth Factor Receptor-2 Polymorphisms Have Protective Effect against the Development of Tendinopathy in Volleyball Athletes

    Science.gov (United States)

    Salles, José Inácio; Duarte, Maria Eugenia Leite; Guimarães, João Matheus; Lopes, Lucas Rafael; Vilarinho Cardoso, Jessica; Aguiar, Diego Pinheiro; Machado Neto, João Olyntho; Machado, Daniel Escorsim; Perini, Jamila Alessandra

    2016-01-01

    The aim of the study was to investigate whether genetic variants in VEGF and KDR genes can be correlated with susceptibility of tendinopathy in volleyball athletes. This study was conducted at the Brazilian Volleyball Federation, and comprised 179 volleyball athletes: 88 had a confirmed diagnosis of tendinopathy (cases), whereas 91 had no evidence of the disease (controls). The VEGF (-2578C>A, -460T>C and +936C>T) and KDR (-604C>T, 1192G>A and 1719T>A) polymorphisms were determined by TaqMan real-time polymerase chain reaction. The odds ratio (OR) with their 95% confidence intervals (CI) were calculated using an unconditional logistic regression model. The evaluation of demographic and clinical characteristics revealed the athlete age (P volleyball (P T, 1192G>A and 1719T>A) haplotypes CGA and CAT were associated with decreased tendinopathy risk (OR: 0.46, 95% CI: 0.21–0.99 and OR: 0.23, 95% CI: 0.07–0.76, respectively). With regards to pain, traumatic lesion and away from training due to injury, VEGF and KDR polymorphisms were not associated with clinical symptoms complaints. The present results provide evidence that the KDR polymorphisms were associated with development of tendinopathy, and can contribute to identify new therapeutic targets or personalized training programs to avoid tendinopathy development in athletes. PMID:27930691

  3. A Psychometric Evaluation of the Group Environment Questionnaire in a Sample of Elite and Regional Level Greek Volleyball Players

    Science.gov (United States)

    Ntoumanis, Nikos; Aggelonidis, Yannis

    2004-01-01

    The purpose of this study was to examine the psychometric properties of the Group Environment Questionnaire (GEQ) adapted to the Greek language. The sample consisted of 586 male and female volleyball players of elite and regional level status. Data were analysed from three time points of a competitive season. For each time point, seven competing…

  4. Estimating service lifetimes of a polymer encapsulant for photovoltaic modules from accelerated testing

    Energy Technology Data Exchange (ETDEWEB)

    Czanderna, A.W.; Pern, F.J. [National Renewable Energy Lab., Golden, CO (United States)

    1996-05-01

    In this paper, most of the emphasis is on A9918 ethylene vinyl acetate (EVA) used commercially as the pottant for encapsulating photovoltaic (PV) modules, in which the efficiencies in field-deployed modules have been reduced by 10-70% in 4-12 years. Yet, projections were made by several different research groups in the 1980s that the EVA lifetime could range from 2-100 years. The authors (1) elucidate the complexity of the encapsulation problem, (2) indicate the performance losses reported for PV systems deployed since 1981, (3) critically assess the service lifetime predictions for EVA as a PV pottant based on studies by others for which they review the inherent errors in their assumptions about the Arrhenius relation, (4) show how degradation of minimodules in laboratory experiments that simulate reality can produce efficiency losses comparable to those in field-degraded PV modules reported in the literature, and (5) outline an acceptable methodology for making a service lifetime prediction of the polymer encapsulant, including the essential need for relating accelerated lifetime testing to real-time testing with a sufficient number of samples.

  5. In-situ medical simulation for pre-implementation testing of clinical service in a regional hospital in Hong Kong.

    Science.gov (United States)

    Chen, P P; Tsui, N Tk; Fung, A Sw; Chiu, A Hf; Wong, W Cw; Leong, H T; Lee, P Sf; Lau, J Yw

    2017-08-01

    The implementation of a new clinical service is associated with anxiety and challenges that may prevent smooth and safe execution of the service. Unexpected issues may not be apparent until the actual clinical service commences. We present a novel approach to test the new clinical setting before actual implementation of our endovascular aortic repair service. In-situ simulation at the new clinical location would enable identification of potential process and system issues prior to implementation of the service. After preliminary planning, a simulation test utilising a case scenario with actual simulation of the entire care process was carried out to identify any logistic, equipment, settings or clinical workflow issues, and to trial a contingency plan for a surgical complication. All patient care including anaesthetic, surgical, and nursing procedures and processes were simulated and tested. Overall, 17 vital process and system issues were identified during the simulation as potential clinical concerns. They included difficult patient positioning, draping pattern, unsatisfactory equipment setup, inadequate critical surgical instruments, blood products logistics, and inadequate nursing support during crisis. In-situ simulation provides an innovative method to identify critical deficiencies and unexpected issues before implementation of a new clinical service. Life-threatening and serious practical issues can be identified and corrected before formal service commences. This article describes our experience with the use of simulation in pre-implementation testing of a clinical process or service. We found the method useful and would recommend it to others.

  6. AUTOMOTIVE DIESEL MAINTENANCE 2. UNIT XVIII, ALTERNATOR AND REGULATOR SERVICING AND TESTING, AND AN INTRODUCTION TO TRANSISTOR REGULATORS.

    Science.gov (United States)

    Minnesota State Dept. of Education, St. Paul. Div. of Vocational and Technical Education.

    THIS MODULE OF A 25-MODULE COURSE IS DESIGNED AS A REVIEW OF THE OPERATING PRINCIPLES AND SERVICING PROCEDURES FOR GENERATORS AND AS AN INTRODUCTION TO TRANSISTOR CONTROLLED VOLTAGE REGULATION FOR GENERATORS USED ON DIESEL POWERED EQUIPMENT. TOPICS ARE (1) REVIEW OF GENERATOR PRINCIPLES, AC AND DC, (2) SERVICING AND TESTING ALTERNATORS, AND (3)…

  7. Somatotype-variables related to muscle torque and power output in female volleyball players.

    Science.gov (United States)

    Buśko, Krzysztof; Lewandowska, Joanna; Lipińska, Monika; Michalski, Radosław; Pastuszak, Anna

    2013-01-01

    The purpose of this study was to investigate the relationship between somatotype, muscle torque, maximal power output and height of rise of the body mass centre measured in akimbo counter movement jump (ACMJ), counter movement jump (CMJ) and spike jump (SPJ), and power output measured in maximal cycle ergometer exercise bouts in female volleyball players. Fourteen players participated in the study. Somatotype was determined using the Heath-Carter method. Maximal muscle torque was measured under static conditions. Power output was measured in 5 maximal cycle ergometer exercise bouts, 10 s each, at increasing external loads equal to 2.5, 5.0, 7.5, 10.0 and 12.5% of body weight (BW). All jump trials (ACMJ, SPJ and CMJ) were performed on a force plate. The mean somatotype of volleyball players was: 4.9-3.5-2.5. The value of the sum of muscle torque of the left upper extremities was significantly correlated only with mesomorphic component. Mesomorphic and ectomorphic components correlated significantly with values of maximal power measured during ACMJ and CMJ. Power output measured in maximal cycle ergometer exercise bouts at increasing external loads equal to 2.5, 5.0 and 7.5% of BW was significantly correlated with endomorphy, mesomorphy and ectomorphy.

  8. Anthropometric, Physical, and Age Differences by the Player Position and the Performance Level in Volleyball

    Directory of Open Access Journals (Sweden)

    Palao José M.

    2014-12-01

    Full Text Available The purpose of this paper was to study the ranges in height, weight, age, spike reach, and block reach of volleyball players in relation to the player position and the level of their respective teams in peak performance. The analysed sample included 1454 male and 1452 female players who participated in the volleyball competitions of the Olympic Games and World Championships in the 2000-2012 period. A descriptive, correlational, and longitudinal design was used. The variables studied were: the player position, body height, weight, body mass index, spike reach, block reach, age, and team level. The results show differences between body height, spike and block reaches, and the age of the players by their position. These differences are related to the needs of the different positions with regard to the actions they execute. Middle-blockers, outside-hitters, and opposites have the characteristics that are most suitable for blocking and spiking, and the setters and liberos appear to have characteristics conducive to setting and receiving as well as digging, respectively. The differences found in the studied variables with regard to the playing position are related to players' needs regarding the actions they perform. Player´s age was a variable that differentiated first teams at this level of competition for males, and physical capacities (body height, weight, spike reach, and block reach were variables that differentiated first teams at this level of competition for females.

  9. Specific warm-up exercise is the best for vertical countermovement jump in young volleyball players

    Directory of Open Access Journals (Sweden)

    Fernando Nazário de Rezende

    Full Text Available Abstract We evaluated the effect of performing various distinct warm-up exercises on vertical countermovement jump (VCMJ performance. Eight volleyball players (age 15.4 ± 0.5 yrs performed five different warm-up activities (in a counterbalanced, randomized crossover study over five days, at 24-h intervals: stretching (4 × 30 s, 30 s between sets, cycloergometer (5 min at 50 W + 5 min at 100 W, resistance exercise (leg press 45°, 3 × 5 repetitions maximum, 3-min pause between sets, specific vertical jumping (4 × 10 VCMJ, 2-min pause between sets, and no warm-up at all (control condition. Beginning 3 min after their warm-up, the players performed 3 attempts (at intervals of 3 min of VCMJ (on a contact carpet, and each player's best jump was considered in the analysis. All warm-up activities presented higher VCMJ performance (p< 0.05 than the control condition, with the exception of stretching. Vertical jumping revealed a large effect size(0.8 than other interventions. We conclude that in practical terms, vertical jumps are the best warm-up exercise (when applied by itself to acutely improve VCMJ performance in volleyball players, but that other exercises can make a complementary contribution.

  10. Response Time, Visual Search Strategy, and Anticipatory Skills in Volleyball Players

    Directory of Open Access Journals (Sweden)

    Alessandro Piras

    2014-01-01

    Full Text Available This paper aimed at comparing expert and novice volleyball players in a visuomotor task using realistic stimuli. Videos of a volleyball setter performing offensive action were presented to participants, while their eye movements were recorded by a head-mounted video based eye tracker. Participants were asked to foresee the direction (forward or backward of the setter’s toss by pressing one of two keys. Key-press response time, response accuracy, and gaze behaviour were measured from the first frame showing the setter’s hand-ball contact to the button pressed by the participants. Experts were faster and more accurate in predicting the direction of the setting than novices, showing accurate predictions when they used a search strategy involving fewer fixations of longer duration, as well as spending less time in fixating all display areas from which they extract critical information for the judgment. These results are consistent with the view that superior performance in experts is due to their ability to efficiently encode domain-specific information that is relevant to the task.

  11. Decreased Circulating mtDNA Levels in Professional Male Volleyball Players.

    Science.gov (United States)

    Nasi, Milena; Cristani, Alessandro; Pinti, Marcello; Lamberti, Igor; Gibellini, Lara; De Biasi, Sara; Guazzaloca, Alessandro; Trenti, Tommaso; Cossarizza, Andrea

    2016-01-01

    Exercise exerts various effects on the immune system, and evidence is emerging on its anti-inflammatory effects; the mechanisms on the basis of these modifications are poorly understood. Mitochondrial DNA (mtDNA) released from damaged cells acts as a molecule containing the so-called damage-associated molecular patterns and can trigger sterile inflammation. Indeed, high plasma levels of mtDNA are associated to several inflammatory conditions and physiological aging and longevity. The authors evaluated plasma mtDNA in professional male volleyball players during seasonal training and the possible correlation between mtDNA levels and clinical parameters, body composition, and physical performance. Plasma mtDNA was quantified by real-time PCR every 2 mo in 12 professional volleyball players (PVPs) during 2 consecutive seasons. As comparison, 20 healthy nonathlete male volunteers (NAs) were analyzed. The authors found lower levels of mtDNA in plasma of PVPs than in NAs. However, PVPs showed a decrease of circulating mtDNA only in the first season, while no appreciable variations were observed during the second season. No correlation was observed among mtDNA, hematochemical, and anthropometric parameters. Regular physical activity appeared associated with lower levels of circulating mtDNA, further confirming the protective, anti-inflammatory effect of exercise.

  12. Different temporal bases for body and arm movements in volleyball serve reception.

    Science.gov (United States)

    Benerink, N H; Bootsma, R J; Zaal, F T J M

    2015-10-01

    In many sports, successfully intercepting a ball requires players to move both their body and their arms. Yet, studies of interception typically focus on one or the other. We performed an analysis of the moments of first foot and arm movements of elite-level volleyball players during serve reception. Video footage of five international matches of the Netherlands men's national volleyball team allowed the systematic coding and analysis of 347 different serve reception events. For each event, we identified the time of serve (TS) and time of contact (TC). Ball flight time (from TS to TC) varied between and within types of serve (power jump serves, n = 193, and jumping float serves, n = 154). Correlation analyses revealed that foot movement was initiated with respect to time from TS, while arm movement was initiated with respect to time until TC. These results suggest that whole-body and arm movements rely on different control processes. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  13. Analysis of Setting Efficacy in Young Male and Female Volleyball Players

    Directory of Open Access Journals (Sweden)

    González-Silva Jara

    2016-12-01

    Full Text Available The main objective of this study was to analyse the variables that predicted setting efficacy in complex I (KI in volleyball, in formative categories and depending on gender. The study sample was comprised of 5842 game actions carried out by the 16 male category and the 18 female category teams that participated in the Under-16 Spanish Championship. The dependent variable was setting efficacy. The independent variables were grouped into: serve variables (a serve zone, the type of serve, striking technique, an in-game role of the server and serve direction, reception variables (a reception zone, a receiver player and reception efficacy and setting variables (a setter‘s position, a setting zone, the type of a set, setting technique, a set’s area and tempo of a set. Multinomial logistic regression showed that the best predictive variables of setting efficacy, both in female and male categories, were reception efficacy, setting technique and tempo of a set. In the male category, the jump serve was the greatest predictor of setting efficacy, while in the female category, it was the set’s area. Therefore, in the male category, it was not only the preceding action that affected setting efficacy, but also the serve. On the contrary, in the female category, only variables of the action itself and of the previous action, reception, affected setting efficacy. The results obtained in the present study should be taken into account in the training process of both male and female volleyball players in formative stages.

  14. Sleep Quality, Mood and Performance: A Study of Elite Brazilian Volleyball Athletes

    Directory of Open Access Journals (Sweden)

    Alexandro Andrade, Guilherme G. Bevilacqua, Danilo R. Coimbra, Fabiano S. Pereira, Ricardo Brandt

    2016-12-01

    Full Text Available This investigation analyzed the relationships between sleep quality, mood, and game results in the elite athletes participating in Brazilian volleyball competitions. Participants (n = 277 elite Brazilian volleyball athletes, 214 (77.3% men and 63 (22.7% women completed the Brunel Mood Scale (BRUMS and reported their subjective sleep perception. Athletes with poor sleep quality reported higher scores for confusion compared to athletes with good sleep quality (p < 0.01, d = 0.43. In addition, athletes who lost their game at the time of evaluation showed higher tension (p < 0.01, d = 0.49 and confusion (p < 0.01, d = 0.32 levels compared to athletes who won their game. A regression analysis demonstrated that for each point increase in the confusion level, there was a 19.7% reduction in sleep quality. Multivariate analysis of variance indicated that athletes who slept well, and won their games, had lower tension levels. Further, our results indicated that the athletes’ mood associated with their success in the competitions. Therefore, in a competition, it is important that the athletes show good sleep quality, and use techniques and strategies to ease their mood variations.

  15. Application of a tri-axial accelerometer to estimate jump frequency in volleyball.

    Science.gov (United States)

    Jarning, Jon M; Mok, Kam-Ming; Hansen, Bjørge H; Bahr, Roald

    2015-03-01

    Patellar tendinopathy is prevalent among athletes, and most likely associated with a high jumping load. If methods for estimating jump frequency were available, this could potentially assist in understanding and preventing this condition. The objective of this study was to explore the possibility of using peak vertical acceleration (PVA) or peak resultant acceleration (PRA) measured by an accelerometer to estimate jump frequency. Twelve male elite volleyball players (22.5 ± 1.6 yrs) performed a training protocol consisting of seven typical motion patterns, including jumping and non-jumping movements. Accelerometer data from the trial were obtained using a tri-axial accelerometer. In addition, we collected video data from the trial. Jump-float serving and spike jumping could not be distinguished from non-jumping movements using differences in PVA or PRA. Furthermore, there were substantial inter-participant differences in both the PVA and the PRA within and across movement types (p volleyball. A method for acquiring real-time estimates of jump frequency remains to be verified. However, there are several alternative approaches, and further investigations are needed.

  16. Anthropometric, Physical, and Age Differences by the Player Position and the Performance Level in Volleyball

    Science.gov (United States)

    Palao, José M.; Manzanares, Policarpo; Valadés, David

    2014-01-01

    The purpose of this paper was to study the ranges in height, weight, age, spike reach, and block reach of volleyball players in relation to the player position and the level of their respective teams in peak performance. The analysed sample included 1454 male and 1452 female players who participated in the volleyball competitions of the Olympic Games and World Championships in the 2000–2012 period. A descriptive, correlational, and longitudinal design was used. The variables studied were: the player position, body height, weight, body mass index, spike reach, block reach, age, and team level. The results show differences between body height, spike and block reaches, and the age of the players by their position. These differences are related to the needs of the different positions with regard to the actions they execute. Middle-blockers, outside-hitters, and opposites have the characteristics that are most suitable for blocking and spiking, and the setters and liberos appear to have characteristics conducive to setting and receiving as well as digging, respectively. The differences found in the studied variables with regard to the playing position are related to players’ needs regarding the actions they perform. Player’s age was a variable that differentiated first teams at this level of competition for males, and physical capacities (body height, weight, spike reach, and block reach) were variables that differentiated first teams at this level of competition for females. PMID:25713683

  17. Acute injuries in soccer, ice hockey, volleyball, basketball, judo, and karate: analysis of national registry data.

    Science.gov (United States)

    Kujala, U M; Taimela, S; Antti-Poika, I; Orava, S; Tuominen, R; Myllynen, P

    1995-12-02

    To determine the acute injury profile in each of six sports and compare the injury rates between the sports. Analysis of national sports injury insurance registry data. Finland during 1987-91. 621,691 person years of exposure among participants in soccer, ice hockey, volleyball, basketball, judo, or karate. Acute sports injuries requiring medical treatment and reported to the insurance company on structured forms by the patients and their doctors. 54,186 sports injuries were recorded. Injury rates were low in athletes aged under 15, while 20-24 year olds had the highest rates. Differences in injury rates between the sports were minor in this adult age group. Overall injury rates were higher in sports entailing more frequent and powerful body contact. Each sport had a specific injury profile. Fractures and dental injuries were most common in ice hockey and karate and least frequent in volleyball. Knee injuries were the most common cause of permanent disability. Based on the defined injury profiles in the different sports it is recommended that sports specific preventive measures should be employed to decrease the number of violent contacts between athletes, including improved game rules supported by careful refereeing. To prevent dental injuries the wearing of mouth guards should be encouraged, especially in ice hockey, karate, and basketball.

  18. EFFECT OF GENDER DIFFERENCE AND CIRCADIAN RHYTHM ON DIASTOLIC BLOOD PRESSURE FOR VOLLEYBALL PLAYERS

    Directory of Open Access Journals (Sweden)

    I. Rajagopal

    2011-04-01

    Full Text Available The purpose of the study was to find out the effect of gender difference and circadian rhythm on diastolic blood pressure for volleyball players. METHODS: To achieve the purpose, a total of thirty volleyball players [men (n = 15 and women (n = 15] age between 19 years and 22 years from Einstein College of Engineering, Tamil Nadu, India were selected as subjects. The two independent variables of gender and circadian variations and dependent variable of diastolic blood pressure were selected for this study. The experimental design used was static group factorial design. The data were collected at 02:00, 06:00, 10:00, 14:00, 18:00 and 22:00 hours on diastolic blood pressure by using Erkameter during the academic year of 2009 – 2010. Collected data were subjected to statistical analysis by using two-way factorial (2 x 6 Analysis of Variance (ANOVA and Cosinor analysis. RESULTS: There was insignificant difference between genders, significant difference at different times of the day and insignificant circadian rhythmicity exists on diastolic blood pressure for women and significant for men. CONCLUSION: It is recommended to the physical educators to adopt the findings of this study while planning to improve sports skills for the players and athletes.

  19. Impact of an Interdisciplinary Food, Nutrition and Health Education Program for adolescent Brazilian volleyball players

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    Natália Vilela Silva DANIEL

    Full Text Available ABSTRACT Objective: To evaluate the impact of an Interdisciplinary Food, Nutrition and Health Education Program on nutrition knowledge, intention to change eating behavior, and body dissatisfaction of adolescent volleyball players. Methods: The sample consisted of 10 female volleyball players from the juvenile category of the city of Santos, São Paulo, Brazil, who participated in a program with eight monthly meetings (one discussion group followed by six educational activities and one final discussion group for evaluation. Results: Nutrition knowledge, body perception, intention to change eating behavior, eating attitudes and practices were investigated using questionnaires and discussion groups before and after the athletes' participation in ludic activities designed to address nutrition strategies for athletic performance and healthy eating, and how to deal with pressure for results and self-image. Nutrition knowledge improved from 57.0%±9.9 to 63.0%±11.8 (p=0.03 of correct answers. The mean body distortion score did not change (70.0±14.9 versus 76.5±22.4, p=0.235. Six athletes advanced in their intention to change eating behavior. Positive food practices were reported during the program and the identified discourses indicated the intention of changing the daily eating habits in the future. Conclusion: The program had a positive impact on nutrition knowledge and intention of changing eating behavior; however, for other issues, especially involving emotional aspects, further interventions should be planned.

  20. FEDIX on-line information service: Design, develop, test, and implement, an on-line research and education information service

    Energy Technology Data Exchange (ETDEWEB)

    Rodman, J.A.

    1992-01-01

    The FEDIX Annual Status Report provides details regarding an on-line information project designed, developed and implemented by Federal Information Exchange, Inc., a diversified information services company. This document details the project design activities, summarizes the developmental phases of the project and describes the implementation activities generated to fulfill the project's objectives. The information contained in this document illustrates FIE's continuing commitment to serve as the link that facilitates the dissemination of federal information to the education community. This report reviews the project accomplishments and describes intended service enhancements.

  1. Evaluation of Acoustic Emission NDE of Composite Crew Module Service Module/Alternate Launch Abort System (CCM SM/ALAS) Test Article Failure Tests

    Science.gov (United States)

    Horne, Michael R.; Madaras, Eric I.

    2010-01-01

    Failure tests of CCM SM/ALAS (Composite Crew Module Service Module / Alternate Launch Abort System) composite panels were conducted during July 10, 2008 and July 24, 2008 at Langley Research Center. This is a report of the analysis of the Acoustic Emission (AE) data collected during those tests.

  2. 如何激发高校大学生学习排球的兴趣%How to Stimulate University Students’Interest in Learning Volleyball

    Institute of Scientific and Technical Information of China (English)

    徐峰

    2015-01-01

    从高校排球教学现状入手,分析了影响学生学习排球兴趣的因素,并就如何培养学生学习排球的兴趣提出了一些思路与方法,以推动排球教学的健康发展。%From the present situation of volleyball teaching in universities, the paper analyzed the factors affecting students ’interest in Volleyball class. In order to promote the healthy development of volleyball teaching, the author put forward some ideas and methods to cultivate students’interest in learning Volleyball,.

  3. Summary analysis of modern volleyball training methods%总结分析现代排球的训练方法

    Institute of Scientific and Technical Information of China (English)

    胡佳丽

    2014-01-01

    随着现代排球运动的迅猛发展,使得排球技能战术水平也随之不断提升。怎样与排球运动发展需求相适应,进一步提升现代排球训练教学水平,是目前教育界所探讨的新课题。%With the rapid development of modern volleyball, volleyball skills and tactics level is also rising. How to adapt themselves to volleyball development needs, and further enhance the level of modern volleyball training teaching, is the new task of education are discussed.

  4. Side-to-side differences in lower extremity biomechanics during multi-directional jump landing in volleyball athletes.

    Science.gov (United States)

    Sinsurin, Komsak; Srisangboriboon, Sarun; Vachalathiti, Roongtiwa

    2017-07-01

    Side-to-side differences of lower extremities may influence the likelihood of injury. Moreover, adding the complexity of jump-landing direction would help to explain lower extremity control during sport activities. The aim was to determine the effects of limb dominance and jump-landing direction on lower extremity biomechanics. Nineteen female volleyball athletes participated. Both dominant limbs (DLs) and non-dominant limbs (NLs) were examined in single-leg jump-landing tests in four directions, including forward (0°), diagonal (30° and 60°), and lateral (90°) directions. Kinematic marker trajectories and ground reaction forces were collected using a 10 camera Vicon system and an AMTI force plate. Repeated measures ANOVA (2 × 4, limb × direction) was used to analyse. The finding showed that, at peak vertical GRF, a significant interaction of limb dominance and direction effects was found in the hip flexion angle and lower extremity joint kinetics (p < .05). NLs and DLs exhibited significantly different strategies while landing in various directions. Significantly higher increase of ankle dorsiflexion angle was observed in lateral direction compared to other directions for both DLs and NLs (p < .05). Increasingly using ankle dorsiflexion was observed from the forward to the lateral direction for both DLs and NLs. However, NLs and DLs preferentially used different strategies of joint moment organization to respond to similar VGRFs in various directions. The response pattern of DLs might not be effective and may expose DLs to a higher injury risk, especially with regard to landing with awkward posture compared with NLs.

  5. Anthropometric and physical characteristics allow differentiation of young female volleyball players according to playing position and level of expertise

    Science.gov (United States)

    Milić, M; Grgantov, Z; Chamari, K; Bianco, A; Padulo, J

    2016-01-01

    The aim of our study was to determine the differences in some anthropometric and physical performance variables of young Croatian female volleyball players (aged 13 to 15) in relation to playing position (i.e., independent variable) and performance level within each position (i.e., independent variable). Players were categorized according to playing position (i.e., role) as middle blockers (n=28), opposite hitters (n=41), passer-hitters (n=54), setters (n=30), and liberos (n=28). Within each position, players were divided into a more successful group and a less successful group according to team ranking in the latest regional championship and player quality within the team. Height and body mass, somatotype by the Heath-Carter method, and four tests of lower body power, speed, agility and upper body power (i.e., dependent variables) were assessed. Players in different positions differed significantly in height and all three somatotype components, but no significant differences were found in body mass, body mass index or measured physical performance variables. Players of different performance level differed significantly in both anthropometric and physical performance variables. Generally, middle blockers were taller, more ectomorphic, less mesomorphic and endomorphic, whereas liberos were shorter, less ectomorphic, more mesomorphic and endomorphic than players in other positions. More successful players in all positions had a lower body mass index, were less mesomorphic and endomorphic, and more ectomorphic than less successful players. Furthermore, more successful players showed better lower body power, speed, agility and upper body power. The results of this study can potentially provide coaches with useful indications about the use of somatotype selection and physical performance assessment for talent identification and development. PMID:28416892

  6. Appraisal of HIV Counseling and Testing Services Provided for Pregnant Women in Selected Government Hospitals in Ibadan Metropolis, Nigeria

    Directory of Open Access Journals (Sweden)

    Olanipekun Asiyanbola

    2016-04-01

    Full Text Available HIV counseling and testing (HCT is a critical gateway to treatment, care, and support services. For pregnant women, it is to access prevention of mother-to-child-transmission (PMTCT services. However, not much has been done to appraise this service from the perspective of the recipients in Nigeria. This study documents the appraisal of the HCT services received at the antenatal care (ANC services in three government hospitals in Ibadan, Nigeria, from the perspectives of pregnant women. Data were collected using focus group discussion guide among purposively selected 40 (21 primigravida and 19 multigravida pregnant women. Observation and inventory checklists were used to collect data on procedures and basic requirements of HCT. Content analysis was used to analyze the data. Participants were neither counseled nor given opportunity to voluntarily participate in HCT services as it was made compulsory before accessing ANC. Test results were reportedly handed over directly to participants without post-test counseling. Observation of HCT procedure showed that guidelines for counseling were not strictly adhered to. Inventory of facilities, staff, and materials revealed inadequate staffing, lack of a dedicated counseling room, and inadequate antiretroviral drugs and test kits. The HCT services as provided for pregnant women are fraught with procedural inadequacies. Training and supervision of health care workers as well as provision of resources are needed to address the situation.

  7. Analysis of group cohesion levels and pre-competitive psychological stress in volleyball athletes.. http://dx.doi.org/10.5007/1980-0037.2012v14n6p704

    Directory of Open Access Journals (Sweden)

    Guilherme Moraes Balbim

    2012-11-01

    Full Text Available This descriptive study was designed to analyze the level of group cohesion and pre-competitive psychological stress of adult volleyball athletes. The subjects consisted of 155 male and female athletes from the state of Parana who played in the JAPS/ 1st division (A, and 2nd division (B. The assessment instruments used were the Group Environment Questionnaire (GEQ and the Volleyball Psychic Stress Test (V-PST. For data analysis, the following tools were used: Cronbach’s alpha, Kolmogorov-Smirnov, Mann-Whitney, one-way Anova, and Tukey’s post hoc (p<0.05. The results revealed that athletes of division A were more negatively influenced by stress factors than the athletes of division B; in terms of individual attraction to the social group (p=0.014 and tasks (p=0016 athletes of division B had higher levels of group cohesion than athletes from division A; athletes with low social cohesion were negatively impacted by factors of "inappropriate physical conditioning" and "excessive nervousness;" athletes with low levels of cohesion for the task were negatively influenced by the factors of "Pressure from other people to win" and positively by the factor "Behavior of the fans in the game outside." It was concluded that group cohesion is demonstrated to be an intervening factor in pre-competitive stress thereby demonstrating that the higher the dispute level, the higher the negative influence of stress.

  8. Robot services for elderly with cognitive impairment: testing usability of graphical user interfaces.

    Science.gov (United States)

    Granata, C; Pino, M; Legouverneur, G; Vidal, J-S; Bidaud, P; Rigaud, A-S

    2013-01-01

    Socially assistive robotics for elderly care is a growing field. However, although robotics has the potential to support elderly in daily tasks by offering specific services, the development of usable interfaces is still a challenge. Since several factors such as age or disease-related changes in perceptual or cognitive abilities and familiarity with computer technologies influence technology use they must be considered when designing interfaces for these users. This paper presents findings from usability testing of two different services provided by a social assistive robot intended for elderly with cognitive impairment: a grocery shopping list and an agenda application. The main goal of this study is to identify the usability problems of the robot interface for target end-users as well as to isolate the human factors that affect the use of the technology by elderly. Socio-demographic characteristics and computer experience were examined as factors that could have an influence on task performance. A group of 11 elderly persons with Mild Cognitive Impairment and a group of 11 cognitively healthy elderly individuals took part in this study. Performance measures (task completion time and number of errors) were collected. Cognitive profile, age and computer experience were found to impact task performance. Participants with cognitive impairment achieved the tasks committing more errors than cognitively healthy elderly. Instead younger participants and those with previous computer experience were faster at completing the tasks confirming previous findings in the literature. The overall results suggested that interfaces and contents of the services assessed were usable by older adults with cognitive impairment. However, some usability problems were identified and should be addressed to better meet the needs and capacities of target end-users.

  9. China and Brazil Women’ s Volleyball Team Statistic Analysis%中国和巴西女排技术统计对比分析

    Institute of Scientific and Technical Information of China (English)

    黄延春

    2016-01-01

    对中国女排和巴西女排在2014年世界女子排球锦标赛中所参加的赛事进行统计分析,重点对两国女排运动员在发球、扣球、拦网等技术环节存在的差异进行对比分析。结果:中国女排在扣球、拦网、发球等得分技术环节的实力与巴西女排有着一定的差异;在防守、一传、小球串联方面,中国女排急需提高;坚持快变技术战术打法,中国女排需要进一步提升运动员的防守、传垫和小球串联技术。%Analyze the Chinese women’ s volleyball team and Brazilian women’ s volleyball team at the 2014 world women’s volleyball tournament, especially the differences such as two countries women’s volleyball athletes in ser-ving, spiking, blocking technical links. Results:Chinese women’s volleyball team in spiking, blocking, sends the strength of the scoring technique links such as with the Brazilian women’ s volleyball team has a certain difference, On the defensive, wally szczerbiak, ball series, it urgently needs to improve Chinese women’ s volleyball team;Adhere to the fast changing technology tactics, the Chinese women’ s volleyball team need to further enhance the defense, the cushion of the athletes and ball series technology.

  10. EPEPT: A web service for enhanced P-value estimation in permutation tests

    Directory of Open Access Journals (Sweden)

    Knijnenburg Theo A

    2011-10-01

    Full Text Available Abstract Background In computational biology, permutation tests have become a widely used tool to assess the statistical significance of an event under investigation. However, the common way of computing the P-value, which expresses the statistical significance, requires a very large number of permutations when small (and thus interesting P-values are to be accurately estimated. This is computationally expensive and often infeasible. Recently, we proposed an alternative estimator, which requires far fewer permutations compared to the standard empirical approach while still reliably estimating small P-values 1. Results The proposed P-value estimator has been enriched with additional functionalities and is made available to the general community through a public website and web service, called EPEPT. This means that the EPEPT routines can be accessed not only via a website, but also programmatically using any programming language that can interact with the web. Examples of web service clients in multiple programming languages can be downloaded. Additionally, EPEPT accepts data of various common experiment types used in computational biology. For these experiment types EPEPT first computes the permutation values and then performs the P-value estimation. Finally, the source code of EPEPT can be downloaded. Conclusions Different types of users, such as biologists, bioinformaticians and software engineers, can use the method in an appropriate and simple way. Availability http://informatics.systemsbiology.net/EPEPT/

  11. Tailoring clinical services to address the unique needs of adolescents from the pregnancy test to parenthood.

    Science.gov (United States)

    Moriarty Daley, Alison; Sadler, Lois S; Dawn Reynolds, Heather

    2013-04-01

    Clinicians across disciplines and practice settings are likely to encounter adolescents who are at risk for a pregnancy. In 2010, 34.2/1000 15-19-year-old teens had a live birth in the United States, many more will seek care for a pregnancy scare or options counseling. Teen mothers are also at risk for a second or higher-order pregnancy during adolescence. This paper provides clinicians with adolescent-friendly clinical and counseling strategies for pregnancy prevention, pre- and post-pregnancy test counseling, pregnancy-related care, and a review of the developmental challenges encountered by teens in the transition to parenthood. Clinicians are in a better position to approach the developmental, health and mental health needs of adolescents related to pregnancy if they understand and appreciate the obstacles adolescents may face negotiating the healthcare system. In addition, when clinical services are specially tailored to the needs of the adolescent, fewer opportunities will be lost to prevent unintended pregnancies, assist teens into timely prenatal services, and improve outcomes for their pregnancies and the transition to parenthood.

  12. Reliability and Validity Evidence for the GED[R] English as a Second Language Test. GED Testing Service[R] Research Studies, 2009-4

    Science.gov (United States)

    Setzer, J. Carl

    2009-01-01

    The GED[R] English as a Second Language (GED ESL) Test was designed to serve as an adjunct to the GED test battery when an examinee takes either the Spanish- or French-language version of the tests. The GED ESL Test is a criterion-referenced, multiple-choice instrument that assesses the functional, English reading skills of adults whose first…

  13. Construction, validation and DIF determination of a test on problem solving for pre-service mathematics teachers

    Directory of Open Access Journals (Sweden)

    Von Anthony Gayas Torio

    2015-02-01

    Full Text Available The field of Mathematics requires a lot of critical thinking and problem solving. These skills are honed as early as the basic education years of the students. Teacher training institutions should make it a necessity that they are able to cater to pre-service teachers who will be able to meet the demands of mathematics education. This paper aimed to construct, validate and determine the Differential Item Functioning (DIF of a problem solving test for pre-service mathematics teachers. This test will later be used as a basis for designing interventions to improve the mathematical aptitude of pre-service teachers. Two universities were chosen with 100 third year students taking Bachelor of Science in Secondary Education major in Mathematics. The tests were constructed and validated by experts before administration to the participants. The participants took the examination and the test was improved based on the results of the item analysis. Differential Item Functioning was also tested using the Standardization Method. The study led to the development of a 60-item validated test on problem solving. After subjecting to DIF analysis, it was found that the two groups tested performed with no significant difference between individuals of similar abilities. The test yielded norm values per sub-skill of the test which will help gauge pre-service mathematics teachers’ problem-solving skills.

  14. 新规则修改对排球比赛的影响%The Impact of Modifying New Rules on the Volleyball Game

    Institute of Scientific and Technical Information of China (English)

    申婷婷

    2014-01-01

    随着排球运动的不断发展,竞赛规则也随着排球运动的发展不断地补充、改进。每一次的修改都带动排球运动的发展和创新,同时也适应排球运动发展的需要。本文从比赛的角度出发,探究新规则对排球比赛产生的影响以及新规则对排球运动发展的意义。%With the continuous development of volleyball sports, the rules of the contest are along with the development of volleyball sports supplement, improving continuously. Every changes lead to the development of volleyball and innovation, but also adapt to the needs of the development of volleyball. This article from the perspective of the game, explores the impact of the new rules of volleyball match and the meaning of the new rules of volleyball development.

  15. Orion Crew Module / Service Module Structural Weight and Center of Gravity Simulator and Vehicle Motion Simulator Hoist Structure for Orion Service Module Umbilical Testing

    Science.gov (United States)

    Ascoli, Peter A.; Haddock, Michael H.

    2014-01-01

    An Orion Crew Module Service Module Structural Weight and Center of Gravity Simulator and a Vehicle Motion Simulator Hoist Structure for Orion Service Module Umbilical Testing were designed during a summer 2014 internship in Kennedy Space Centers Structures and Mechanisms Design Branch. The simulator is a structure that supports ballast, which will be integrated into an existing Orion mock-up to simulate the mass properties of the Exploration Mission-1 flight vehicle in both fueled and unfueled states. The simulator mimics these configurations through the use of approximately 40,000 lbf of steel and water ballast, and a steel support structure. Draining four water tanks, which house the water ballast, transitions the simulator from the fueled to unfueled mass properties. The Ground Systems Development and Operations organization will utilize the simulator to verify and validate equipment used to maneuver and transport the Orion spacecraft in its fueled and unfueled configurations. The second design comprises a cantilevered tripod hoist structure that provides the capability to position a large Orion Service Module Umbilical in proximity to the Vehicle Motion Simulator. The Ground Systems Development and Operations organization will utilize the Vehicle Motion Simulator, with the hoist structure attached, to test the Orion Service Module Umbilical for proper operation prior to installation on the Mobile Launcher. Overall, these two designs provide NASA engineers viable concepts worthy of fabricating and placing into service to prepare for the launch of Orion in 2017.

  16. Sports benefits and the importance of muscle strength treinability in prepubertal volleyball athletes

    Directory of Open Access Journals (Sweden)

    Flávia Meyer

    2005-12-01

    Full Text Available The purpose of this review was to investigate the main benefits of sports and the importance and treinability muscle strenght in prepubescent volleyball athletes. Brazilian children are participating in competitive sports due to the increase of volleyball popularity. According to the literature reviewed, it seems that physical training is beneficial to bone tissue and tends to estimulate growth in height to the genetic limits. The main goal of children volleyball trainig is to improve basic technique and tatics and also to discover new talents. Young athletes need to be strong, fast, flexible and agile to achieve success. Strength training is indicated as an important complement to specific sports training of young athletes, due to improvement of muscle coordination and motor skills in competitive and recreational activities and to a decrease of joint overload and risk of injury. RESUMO O objetivo desta revisão foi investigar os principais benefícios do esporte e a importância e treinabilidade da força muscular de crianças pré-púberes atletas de voleibol. Com o aumento da popularidade do voleibol no Brasil, as crianças estão participando mais de competições esportivas. Conforme a literatura revisada, parece que o treinamento físico moderado é benéfico para o tecido ósseo e estimula o crescimento em estatura, até atingir a estatura geneticamente determinada. O principal objetivo do treinamento de voleibol para crianças é desenvolver as técnicas e as táticas básicas e detectar talentos esportivos. Para os jovens atletas obterem sucesso esportivo são necessárias qualidades físicas como força, velocidade, flexibilidade e agilidade. O treinamento de força muscular é indicado como auxiliar do treinamento esportivo para crianças atletas, melhorando a coordenação muscular e o desempenho motor nas atividades esportivas competitivas e recreacionais e diminuindo as sobrecargas articulares e o risco de lesões.

  17. Muscle and Tendon Adaptation in Adolescence: Elite Volleyball Athletes Compared to Untrained Boys and Girls

    Directory of Open Access Journals (Sweden)

    Falk Mersmann

    2017-06-01

    Full Text Available Though the plasticity of human tendons is well explored in adults, it is still unknown how superimposed mechanical loading by means of athletic training affects the properties of tendons during maturation. Due to the increased responsiveness of muscle to mechanical loading, adolescence is an important phase to investigate the effects of training on the mechanical properties of tendons. Hence, in the present study we compared vastus lateralis (VL architecture, muscle strength of the knee extensor muscles and patellar tendon mechanical properties of male and female adolescent elite athletes to untrained boys and girls. Twenty-one adolescent volleyball athletes (A; 16.7 ± 1 years; 12 boys, 9 girls and 24 similar-aged controls (C; 16.7 ± 1 years; 12 boys and girls, respectively performed maximum isometric contractions on a dynamometer for the assessment of muscle strength and, by integrating ultrasound imaging, patellar tendon mechanical properties. Respective joint moments were calculated using an inverse dynamics approach and an electromyography-based estimation of antagonistic contribution. Additionally, the VL pennation angle, fascicle length and muscle-thickness were determined in the inactive state by means of ultrasound. Adolescent athletes produced significantly greater knee extension moments (normalized to body mass compared to controls (A: 4.23 ± 0.80 Nm/kg, C: 3.57 ± 0.67 Nm/kg; p = 0.004, and showed greater VL thickness and pennation angle (+38% and +27%; p < 0.001. Tendon stiffness (normalized to rest length was also significantly higher in athletes (A: 86.0 ± 27.1 kN/strain, C: 70.2 ± 18.8 kN/strain; p = 0.04, yet less pronounced compared to tendon force (A: 5785 ± 1146 N, C: 4335 ± 1015 N; p < 0.001, which resulted in higher levels of tendon strain during maximum contractions in athletes (A: 8.0 ± 1.9%, C: 6.4 ± 1.8%; p = 0.008. We conclude that athletic volleyball training provides a more efficient stimulus for muscle

  18. Accelerated Life Testing and Service Lifetime Prediction for PV Technologies in the Twenty-First Century

    Energy Technology Data Exchange (ETDEWEB)

    Czanderna, A. W.; Jorgensen, G. J.

    1999-07-13

    The purposes of this paper are to (1) discuss the necessity for conducting accelerated life testing (ALT) in the early stages of developing new photovoltaic (PV) technologies, (2) elucidate the crucial importance for combining ALT with real-time testing (RTT) in terrestrial environments for promising PV technologies for the 21st century, and (3) outline the essential steps for making a service lifetime prediction (SLP) for any PV technology. The specific objectives are to (a) illustrate the essential need for ALT of complete, encapsulated multilayer PV devices, (b) indicate the typical causes of degradation in PV stacks, (c) elucidate the complexity associated with quantifying the durability of the devices, (d) explain the major elements that constitute a generic SLP methodology, (e) show how the introduction of the SLP methodology in the early stages of new device development can reduce the cost of technology development, and (f) outline the procedure for combining the results of ALT and RTT, establishing degradation mechanisms, using sufficient numbers of samples, and applying the SLP methodology to produce a SLP for existing or new PV technologies.

  19. Somatotype and body composition of volleyball players and untrained female students – reference group for comparison in sport

    Directory of Open Access Journals (Sweden)

    Pastuszak Anna

    2016-12-01

    Full Text Available There is substantial evidence that somatotype and success in sport and physical performance are positively related. Existing somatotype data on athletes are useful as guidelines for sport selection and choice of training appropriate to the enhancement of desired somatotype characteristics. Updated somatotype data from non-athlete reference groups complement comparative analysis applied in assessing the effects of the training process and selection. The aim of this study was to determine the somatotype of untrained girls studying at Warsaw University of Technology in 2011, in order to create a current reference group for comparison, and to investigate the difference in body build of female volleyball players compared with the non-athlete group. Twelve Second Division female volleyball players (age 21.6±1.5 years, body height 177.3±6.2 cm, body mass 71.0±6.5 kg, training experience 8.4±3.4 years and 150 female untrained students of the University of Technology in Warsaw (age 20.0±6.4 years, body height 166.5±6.4 cm, body mass 59.7±8.4 kg participated in a study carried out in 2011. Somatotype was determined using the Heath-Carter method. The volleyball players were a little older and were significantly taller and heavier than female students (p<0.05. Significant differences between the groups were found in breadth of the elbow, breadth of the wrist, biacromial diameter, arm circumference and crus circumference (p<0.05. The mean somatotype of the volleyball players was 4.5-3.4-2.8. (4.5±1.0-3.4±1.2-2.8±1.3, whilst that of the untrained students was 5.1-3.6-2.8. (5.1±1.4-3.6±1.1-2.8±1.3; the groups did not differ significantly in somatotype. The groups were significantly different in body composition (F [kg] and LBM [kg], as estimated by BIA and anthropometric methods (p<0.05. No differences were observed between the groups in the skinfolds. Morphological characteristics of the female volleyball players depended on the competition level

  20. Development of in-service inspection system for core support graphite structures in the high temperature engineering test reactor (HTTR)

    Energy Technology Data Exchange (ETDEWEB)

    Sumita, Junya; Hanawa, Satoshi; Kikuchi, Takayuki; Ishihara, Masahiro [Japan Atomic Energy Research Inst., Oarai, Ibaraki (Japan). Oarai Research Establishment

    2003-03-01

    Visual inspection of core support graphite structures using TV camera as in-service inspection and measurement of material characteristics using surveillance test specimens are planned in the High Temperature Engineering Test Reactor (HTTR) to confirm structural integrity of the core support graphite structures. For the visual inspection, in-service inspection system developed from September 1996 to June 1998, and pre-service inspection using the system was carried out. As the result of the pre-service inspection, it was validated that high quality of visual inspection with TV camera can be carried out, and also structural integrity of the core support graphite structures at the initial stage of the HTTR operation was confirmed. (author)