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The aim of this investigation is to assess the effectiveness of a 6-week balance training (BT) protocol, integrated in regular training sessions, on postural sway of young female volleyball players (n = 26, age 13.0 +/- 0.2 years) divided into two groups (intervention and control; 13 per group). Trials were performed for bipedal and unipedal stance conditions before and after the BT protocol, using a pressure platform to collect center-of-pressure (COP) time series that were processed to calculate sway area, COP path length, and maximum displacement range in anteroposterior and mediolateral directions. The intervention group exhibited smaller sway areas in eyes closed conditions (intervention = 42.76 mm2, control = 67.60 mm2; p < 0.05) and Romberg quotients (intervention = 1.11 mm, control = 1.82 mm) in bipedal stance, while all the other parameters were unaffected. BT also reduced sway area (intervention = 122.70 mm2, control = 187.18 mm2) and anteroposterior COP displacements (intervention = 20.18 mm, control = 22.38 mm) of the non-dominant limb for single-leg stance. No significant change was found for the dominant limb. Although it is possible to hypothesize a beneficial effect of BT on young athletes, further investigations are required to clarify its actual effect on balance performance with respect to normal volleyball training.  相似文献   
2.
Recogito 2 is an open source annotation tool currently under development by Pelagios, an international initiative aimed at facilitating better linkages between online resources documenting the past. With Recogito 2, we aim to provide an environment for efficient semantic annotation—i.e., the task of enriching content with references to controlled vocabularies—in order to facilitate links between online data. At the same time, we address a perceived gap in the performance of existing tools, by emphasizing the development of mechanisms for manual intervention and editorial control that support the curation of quality data. While Recogito 2 provides an online workspace for general-purpose document annotation, it is particularly well-suited for geo-annotation, in other words annotating documents with references to gazetteers, and supports the annotation of both texts and images (i.e., digitized maps). Already available for testing at http://recogito.pelagios.org, its formal release to the public occurred in December 2016.  相似文献   
3.
Abstract

The aim of this study was to determine whether the highest vitamin C supplementation associated with complete bioavailability influences the plasma and blood mononuclear cell IL-6 and IL-10 response to exercise. A double-blinded study of supplementation with vitamin C was performed. After 15 days of supplementation with vitamin C (500 mg · day?1, n = 16) or a placebo (n = 15), participants in the study completed a 15-km run competition. Blood samples were taken before and after competition. Oxidative stress markers, antioxidants, cortisol, IL-6 and IL-10 were determined in plasma or serum. IL-6 and IL-10 protein and mRNA levels were measured in blood mononuclear cells. Although higher plasma and blood mononuclear cell vitamin C levels were observed in the supplemented group when compared with the placebo one, the two groups showed identical exercise-induced changes in all the measured parameters. Exercise induced increased IL-6 and IL-10 levels in plasma and blood mononuclear cells. IL-6 and IL-10 mRNA levels in blood mononuclear cells increased after the competition. After recovery, IL-6 mRNA returned to basal levels and IL-10 mRNA levels remained elevated. In conclusion, exercise induced increased IL-6 and IL-10 production in blood mononuclear cells. However, vitamin C supplementation did not influence IL-6 and IL-10 response to exercise.  相似文献   
4.

This study compares the linguistic development of a gifted bilingual child from birth to 7 with that of subjects in first language acquisition research. The aspects analyzed are phonology, morphology (word formation), lexicon, modality (encoding of speaker's attitude towards the truthfulness of a proposition), syntax (sentence construction), semantic and syntactic logic, metaphoric use, ambiguity, humor, and social competence. The comparison shows not only the gifted child's acceleration through the normal course of development, but also subversion of that path. This article, in presenting linguistic evidence that offers insight on cognitive and psychosocial development, raises questions about the established idea of domain specificity and the intelligence/creativity dichotomy. As a first project of its kind ‐ a longitudinal study of spontaneous speech ‐the findings here suggest that investigation of performance in real time can help provide a fuller picture of how the gifted mind is truly exceptional.  相似文献   
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6.
ABSTRACT

The aim of the present investigation was to analyze the validity and reliability of a novel iPhone app (CODTimer) for the measurement of total time and interlimb asymmetry in the 5 + 5 change of direction test (COD). To do so, twenty physically active adolescent athletes (age = 13.85 ± 1.34 years) performed six repetitions in the COD test while being measured with a pair of timing gates and CODTimer. A total of 120 COD times measured both with the timing gates and the app were then compared for validity and reliability purposes. There was an almost perfect correlation between the timing gates and the CODTimer app for the measurement of total time (r = 0.964; 95% Confidence interval (CI) = 0.95–1.00; Standard error of the estimate = 0.03 s.; p < 0.001). Moreover, non-significant, trivial differences were observed between devices for the measurement of total time and interlimb asymmetry (Effect size < 0.2, p > 0.05). Similar levels of reliability were observed between the timing gates and the app for the measurement of the 6 different trials of each participant (Timing gates: Intraclass correlation coefficient (ICC) = 0.651–0.747, Coefficient of variation (CV) = 2.6–3.5%; CODTimer: ICC = 0.671–0.840, CV = 2.2–3.2%). The results of the present study show that change of direction performance can be measured in a valid, reliable way using a novel iPhone app.  相似文献   
7.
ABSTRACT

This study evaluated the quality of early childhood education (ECE) environments, the quality of teacher-child interactions and the duration of free play in 22 ECE classrooms in the Valencian Community, Spain. Twenty-two ECE teachers of four- and five-year-old preschoolers participated in the study. The quality of ECE environments and teacher-child interactions were evaluated using the ECERS-3 and TSRS, respectively. The time children spent in free play and non-free play was also registered. The study concluded that the quality of ECE environments was minimal. The scores of teachers on emotional support were in the medium-high range and scores in instructional support were low, with direct instruction as the predominant teaching style. Indoor free play was positively related to the overall quality of ECE environments and the quality of teacher-child interactions. The findings of this study are discussed in relation to the results of other studies in the Spanish context.  相似文献   
8.
The aim of this investigation is to assess the effectiveness of a 6-week balance training (BT) protocol, integrated in regular training sessions, on postural sway of young female volleyball players (n = 26, age 13.0 ± 0.2 years) divided into two groups (intervention and control; 13 per group). Trials were performed for bipedal and unipedal stance conditions before and after the BT protocol, using a pressure platform to collect center-of-pressure (COP) time series that were processed to calculate sway area, COP path length, and maximum displacement range in anteroposterior and mediolateral directions. The intervention group exhibited smaller sway areas in eyes closed conditions (intervention = 42.76 mm2, control = 67.60 mm2; p < 0.05) and Romberg quotients (intervention = 1.11 mm, control = 1.82 mm) in bipedal stance, while all the other parameters were unaffected. BT also reduced sway area (intervention = 122.70 mm2, control = 187.18 mm2) and anteroposterior COP displacements (intervention = 20.18 mm, control = 22.38 mm) of the non-dominant limb for single-leg stance. No significant change was found for the dominant limb. Although it is possible to hypothesize a beneficial effect of BT on young athletes, further investigations are required to clarify its actual effect on balance performance with respect to normal volleyball training.  相似文献   
9.
The purpose of the present study is to analyse and map the trends in research on prion diseases by applying bibliometric tools to the scientific literature published between 1973 and 2002. The data for the study were obtained from the Medline database. The aim is to determine the volume of scientific output in the above period, the countries involved and the trends in the subject matters addressed. Significant growth is observed in scientific production since 1991 and particularly in the period 1996–2001. The countries found to have the highest output are the United States, the United Kingdom, Japan, France and Germany. The collaboration networks established by scientists are also analysed in this study, as well as the evolution in the subject matters addressed in the papers they published, that are observed to remain essentially constant in the three sub-periods into which the study is divided.  相似文献   
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