Factors associated with minimal changes in countermovement jump performance throughout a competitive division I collegiate basketball season     

Gabriel J. Sanders  Brian Boos  Jessica Rhodes  Roger O. Kollock  Corey A. Peacock  Cory M. Scheadler 《Journal of sports sciences》2013,31(19):2236-2242

ABSTRACT

The purpose of the study was to assess factors that contribute to countermovement jump (CMJ) performance in women’s basketball athletes. Thirteen female athletes participated and were tested for maximal oxygen uptake (VO_2max) and heart rate (HR_max). Athletes were monitored, daily for a total of 21 weeks with heart rate-based wearable devices and CMJ performance and body weight were tested weekly after one day of recovery. 3-jump average height (CMJ_avg), maximum height jump (CMJ_max), and CMJ power (Watts) were calculated and recorded. Playing intensities >85% HR_max, HR_avg, HR_max and training load were averaged for three consecutive days prior to the recovery day. After the season, data was grouped as changes in CMJ power from week one: Large (≤ ?4.39% change), Moderate (?4.4% to ?0.62% change), and Minimal (≥ ?0.61% change) changes. Fixed-effects models revealed a main effect of group (p ≤ 0.05) for CMJ_avg, CMJ_max, VO_2max, weekly percent changes in body weight and for 3-day training load, HR_avg, and playing time at >85% HR_max. When athletes experienced minimal changes in CMJ performance, relative to large changes, they produced greater power, jumped higher, avoided negative changes in weekly body weight, had a greater preseason VO_2max and 3-day average workloads appeared to have an impact on CMJ performance  相似文献   

The effective reduction of tourniquet application time after minor modification of the CLSI H03-A6 blood collection procedure     

Gabriel Lima-Oliveira  Giuseppe Lippi  Gian Luca Salvagno  Martina Montagnana  Geraldo Picheth  Gian Cesare Guidi 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2013,23(3):308-315

Introduction:

The phlebotomists’ procedures are a still source of laboratory variability. The aim of this study was to verify the efficacy of minor modification in procedure for collection of diagnostic blood specimens by venipuncture from CLSI H03-A6 document is able to reduce the tourniquet application time.

Materials and methods:

Thirty phlebotomists were invited to participate. Each phlebotomist was trained individually to perform the new venipuncture procedure that shortens the time of tourniquet release and removal. The phlebotomy training program was delivered over 8h. After training, all phlebotomists were monitored for 20 working days, to guarantee the adoption of the correct new procedures for collection of diagnostic blood specimens. After this time frame the phlebotomists were evaluated to verify whether the new procedure for blood collection derived from CLSI H03-A6 document was effective to improve the quality process by decrease in tourniquet application time. We compared the tourniquet application time and qualitative difference of phlebotomy procedures between laboratories before and after phlebotomy training.

Results:

The overall mean ± SD tourniquet application time before and after this intervention were 118 ± 1 s and 30 ± 1 s respectively. Minor modifications in procedure for blood collection were able to reduce significantly the tourniquet application time (−88 s, P < 0.001).

Conclusions:

The minor modifications in procedure for collection of diagnostic blood specimens by venipuncture from CLSI H03-A6 document were able to reduce the tourniquet application time. Now the proposed new procedure for collection of diagnostic blood specimens by venipuncture could be considered usefulness and should be put into practice by all quality laboratory managers and/or phlebotomy coordinators to avoid preanalytical errors regard venous stasis and guarantee patient safety.  相似文献   

Identification and description of controlled clinical trials in Spanish language dental journals          下载免费PDF全文

Julio Villanueva  Isabel Delgado  Julio R. Saldarriaga  Maria Garcia Gargallo  Yanina Amaro  Sebastián Zapata  Lorena Núñez  Gabriel Zamorano  Hector Pardo‐Hernandez  Xavier Bonfill  Conchita Martin 《Health information and libraries journal》2018,35(3):192-201

  相似文献   

“Really Social Photojournalism” and a Photojournalistic Changing of the Guard: Observations and Insights     

Gabriel B. Tait 《Visual Communication Quarterly》2017,24(4):230-242

In a changing technological ecosystem where photojournalists are attempting to reach larger audiences, they are forced to serve multiple masters and social media platforms. The tools and terminologies that these visual storytellers and communicators are using are also changing, which forces many of them to grapple with their roles and how best to contribute their craft within a market that is drastically different than two decades ago. This study asked 104 photojournalism practitioners, academicians, and administrators to define and explain the term “Really Social Photojournalism” and if it might rise past the level of jargon in a changing vocation? The findings reveal there are many complexities with this new term. But there are also opportunities for RSP to evolve in the photojournalism ecosystems with the appropriate support of its various stakeholders.  相似文献   

Frequency of museum attendance: motivation matters     

Juan Gabriel Brida  Chiara Dalle Nogare  Raffaele Scuderi 《Journal of Cultural Economics》2016,40(3):261-283

Some recent empirical contributions have highlighted that tourists often go to museums yet appear to extract little utility from the experience. We argue that this is often the case with agents who visit museums only while on holiday and results from a temporary lack of substitute experience goods or compliance with a must-do list. If such agents behaved according to Stigler and Becker’s rational addiction theory, they would also visit museums while at home. However, most do not, which makes them constantly occasional consumers. We indirectly test for the presence of constantly occasional museum attendance by tourists, using data from a survey conducted in 2012 at Vittoriale, the most popular museum at Lake Garda, a renowned Italian tourist destination. By applying multiple correspondence analysis to a question on motivations to visit the museum, we obtain two dimensions of motivation: one based on a search for knowledge and the other based on a more recreational attitude. Identification of the latter is a new finding in itself. We include these dimensions as regressors in a model used to explain museum attendance. We find, as expected, that light consumption negatively affects attendance. We therefore argue that empirical analyses of museum attendance should not disregard light motivation as a possible driver.  相似文献   

Undergraduate students' understanding of the contraposition equivalence rule in symbolic and verbal contexts     

Andreas J. Stylianides  Gabriel J. Stylianides  George N. Philippou 《Educational Studies in Mathematics》2004,55(1-3):133-162

Literature suggests that the type of context wherein a task is placed relates to students' performance and solution strategies. In the particular domain of logical thinking, there is the belief that students have less difficulty reasoning in verbal than in logically equivalent symbolic tasks. Thus far, this belief has remained relatively unexplored in the domain of teaching and learning of mathematics, and has not been examined with respect to students' major field of study. In this study, we examined the performance of 95 senior undergraduate mathematics and education majors in symbolic and verbal tasks about the contraposition equivalence rule. The selection of two different groups of participants allowed for the examination of the hypothesis that students' major may influence the relation between their performance in tasks about contraposition and the context(symbolic/verbal) wherein this is placed. The selection of contraposition equivalence rule also addressed a gap in the body of research on undergraduate students' understanding of proof by contraposition. The analysis was based on written responses of all participants to specially developed tasks and on semi-structured interviews with 11 subjects. The findings showed different variations in the performance of each of the two groups in the two contexts. while education majors performed significantly better in the verbal than in the symbolic tasks, mathematics majors' performance showed only modest variations. The results call for both major- and context- specific considerations of students' understanding of logical principles, and reveal the complexity of the system of factors that influence students' logical thinking.  相似文献   

Effect of the parental involvement style perceived by elementary school students at home on Language and Mathematics performance in chilean schools     

Verónica Gubbins  Gabriel Otero 《Educational studies》2016,42(2):121-136

The present study intends to measure the effect of the parental involvement style perceived by fourth-grade students on their Language and Mathematics performance. It uses data taken from a sample of 55,401 students evaluated by the National Education Quality Measurement System [Sistema Nacional de Medición de la Calidad de la Educación, SIMCE]. The results show that the nourishing parental involvement style, and not only household income and the parents’ years of schooling, are associated with and significantly predict higher scores on the Language and Mathematics tests. This finding is relevant inasmuch as it provides operational information regarding parental involvement styles, which opens up more possibilities for psychoeducational intervention by the school.  相似文献   

Which strategy for which learner?     

J P Gabriel  J K Pillai 《British journal of educational technology : journal of the Council for Educational Technology》1988,19(3):211-220

The selection of a suitable learning strategy in individualised science instruction should be influenced by the learning potential of the learners. Components of their'learning potential'include: aptitude, scientific affect, attitude, and college scores. Achievement gain was measured by the difference between pre-test and post-test scores with the credits gained through the enrichment and task activities. Based on their gain scores, learners were divided into high, average and low achievers and their preferences for learning strategies were collected. The results indicated marked differences according to learning potential.
Other research has investigated the question of suitable learning strategies for different kinds of learners, but its validity often has been restricted by a limited number of strategies with only a small number of learning components analysed. To overcome such constraints, this study included six independent learning strategies and seven group learning ones. Instead of calculating simple correlations, the influence of different components of learning potential was analysed for three achievement levels, and interaction effects were separated.  相似文献   

Regulating readers' bodies: a discourse analysis of teachers' body talk     

Jessica Nina Lester  Rachael Gabriel 《Discourse: Studies in the Cultural Politics of Education》2017,38(5):688-700

In this paper, we report findings from a discourse analysis study of reading instruction in eight primary/elementary school classrooms in the United States. Drawing upon discursive psychology, we specifically examined 96 hours of reading comprehension instruction, with a focus on how teachers talked about the body during the instruction and noted how this gave rise to particular constructions of what it means to be a ‘good’ reader and/or learner. We discuss two patterns from the analysis of our data, including: (1) emphasized versus embedded physical control as essential to being a ‘successful’ reader, and (2), implicit physical control and freedom as essential to literacy learning and to students' identities as readers. We conclude by highlighting implications, with a focus on student identity.  相似文献   

A multilevel study of position effects in PISA achievement tests: student- and school-level predictors in the German tracked school system     

Gabriel Nagy  Benjamin Nagengast  Andreas Frey  Michael Becker  Norman Rose 《Assessment in Education: Principles, Policy & Practice》2019,26(4):422-443

Abstract

Position effects (PE) cause decreasing probabilities of correct item responses towards the end of a test. We analysed PEs in science, mathematics and reading tests administered in the German extension to the PISA 2006 study with respect to their variability at the student- and school-level. PEs were strongest in reading and weakest in mathematics. Variability in PEs was found at both levels of analysis. PEs were stronger for male students, for students with a migration background (science and mathematics), and for students with a less favourable socio-economic background (reading). At the school level, PEs were stronger in lower school tracks and in schools with a high proportion of students with a migration background. The relationships of the test scores with the covariates partly reflected the covariates’ relationships with PEs. Our findings suggest that PEs should be taken seriously in large-scale assessments as they have an undesirable impact on the results.  相似文献