Body composition and nutritional profile of male adolescent tennis players

In this cross-sectional study, we evaluated the body composition and dietary intake of 44 adolescent tennis players. After being divided into two groups (age 10-13 years and age 14-18), the players had their weight, height, and sexual maturation assessed. Dual-energy X-ray absorptiometry was used to assess body composition. Food intake was obtained from a non-consecutive 4-day food record. The data were analysed using the Virtual Nutri v.1.0 software and compared with the present recommendations for adolescent athletes or dietary reference intakes. Body mass index and body fat for tennis practice were adequate for 89% and 71% of the tennis players respectively, regardless of age group. A calorie deficit greater than 10% of energy expenditure was observed in 32% of the sample. Fifty percent of the athletes consumed carbohydrates in accordance with recommended values. Protein and lipid intakes were above recommended values, while fibre, calcium, potassium, magnesium, and folic acid intakes were below recommendation for 98%, 80%, 100%, 100%, and 98% of the tennis players respectively. The observed nutritional deficiencies represent an additional barrier for adolescents engaged in competitive sports to achieve an optimum nutrition to maintain growth, health, and performance.     

Moving average procedures as an additional tool for real-time analytical quality control: challenges and opportunities of implementation in small-volume medical laboratories

IntroductionMoving average (MA) is one possible way to use patient results for analytical quality control in medical laboratories. The aims of this study were to: (1) implement previously optimized MA procedures for 10 clinical chemistry analytes into the laboratory information system (LIS); (2) monitor their performance as a real-time quality control tool, and (3) define an algorithm for MA alarm management in a small-volume laboratory to suit the specific laboratory.Materials and methodsMoving average alarms were monitored and analysed over a period of 6 months on all patient results (total of 73,059) obtained for 10 clinical chemistry parameters. The optimal MA procedures were selected previously using an already described technique called the bias detection simulation method, considering the ability of bias detection the size of total allowable error as the key parameter for optimization.ResultsDuring 6 months, 17 MA alarms were registered, which is 0.023% of the total number of generated MA values. In 65% of cases, their cause was of pre-analytical origin, in 12% of analytical origin, and in 23% the cause was not found. The highest alarm rate was determined on sodium (0.10%), and the lowest on calcium and chloride.ConclusionsThis paper showed that even in a small-volume laboratory, previously optimized MA procedures could be successfully implemented in the LIS and used for continuous quality control. Review of patient results, re-analysis of samples from the stable period, analysis of internal quality control samples and assessment of the analyser malfunctions and maintenance log have been proposed for the algorithm for managing MA alarms.     

Emotional profiles regarding maths among primary school children – A two-year longitudinal study

Learning maths is challenging for many primary school students, and teachers must understand students’ learning and emotional processes specific to learning maths. The current research, grounded in control-value theory, focused on achievement emotions regarding maths. Primary school students (N?=?71) were studied with the primary objective of examining the longitudinal trajectories of achievement emotions of third graders over two years. The Portuguese Achievement Emotions Questionnaire for Elementary Students was administered biannually to assess enjoyment, anxiety, and boredom regarding maths. The results indicate that enjoyment decreased and boredom increased over time, revealing three emotional profiles: positive, negative and moderate. The positive profile showed the highest scores in maths achievement. Profile membership was moderately stable and became increasingly stable and structured. In examining the complexity of students’ emotional profiles and processes, the importance of understanding them to enhance educational support, development, and learning was highlighted.

     

A seventeenth century Japanese painting: Scientific identification of materials and techniques

A Japanese painting on paper, in the form of a horizontal scroll from the Stibbert Museum in Florence, is being treated at the ISCR Paper Conservation Laboratory. The scroll, entitled Bamo Dōi-zu represents 33 different types of horses. Although there is no author's seal, it has been attributed to the famous Japanese artist, Kanō Sansetsu (1589–1651). Before conservation treatment, the artefact underwent technical and scientific examination in order to identify its materials and determine its conservation condition. As sampling paint layers from paintings on paper is extremely invasive, non-destructive techniques such as X-ray fluorescence spectroscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, and spectrophotometry were employed. Several points from the paper support were analysed: the metal-leaf decorations, the seals and calligraphy, as well as the painted horses. Results detected and revealed a very simple palette: cinnabar (or its synthetic equivalent vermillion), shell white, carbon black, and the organic yellow gamboge. Pure gold and silver leaves were used for decorating the frontispiece. Useful information was obtained from the paper support and on its conservation conditions. Micro-destructive analyses were also performed on a few paper fragments for microscopic and scanning electron microscope equipped with an X-ray probe analysis. Results showed that materials and techniques are consistent with the Kanō School period.     

Effects of concurrent training on interleukin-6, tumour necrosis factor-alpha and C-reactive protein in middle-aged men

The purpose of this study was to evaluate the effects of moderate- to high-intensity resistance and concurrent training on inflammatory biomarkers and functional capacity in sedentary middle-aged healthy men. Participants were selected on a random basis for resistance training (n = 12), concurrent training (n = 11) and a control group (n = 13). They performed three weekly sessions for 16 weeks (resistance training: 10 exercises with 3 × 8-10 repetition maximum; concurrent training: 6 exercises with 3 × 8-10 repetition maximum, followed by 30 minutes of walking or running at 55-85% [Vdot]O(2peak)). Maximal strength was tested in bench press and leg press. The peak oxygen uptake ([Vdot]O(2peak)) was measured by an incremental exercise test. Tumour necrosis factor-α, interleukin-6 and C-reactive protein were determined. The upper- and lower-body maximal strength increase for both resistance (+42.52%; +20.9%, respectively) and concurrent training (+28.35%; +21.5%, respectively) groups (P = 0.0001).[Vdot]O(2peak) increased in concurrent training when comparing pre- and post-training (P = 0.0001; +15.6%). No differences were found in tumour necrosis factor-α and interleukin-6 for both groups after the exercise. C-reactive protein increased in resistance training (P = 0.004). These findings demonstrated that 16 weeks of moderate- to high-intensity training could improve functional capacity, but did not decrease inflammatory biomarkers in middle-aged men.     

Organizing A Painting Set-Up For Young Children

The purpose of this study was to compare the perceptions of teacher competence within and among three groups of educators (teachers, college supervisors, and public school administrators) as measured by the interview scales of the Instrument for the Observation of Teaching Activities (IOTA) . Six teachers were interviewed, and the interviews were recorded on video tape. Thirty educators, stratified into three groups, and randomly selected from those trained in use of the Instrument, scored the taped interviews. A reliability coefficient for each group of recorders and for the total of the three groups of recorders was calculated from the statistics generated by a three-way analysis of variance. A two-way analysis of variance was then utilized to test for the significance of differences among the three groups of recorders and within each group of recorders and within all recorders on each individual scale. The major findings and conclusions of this study were as follows: 1.) The reliability coefficients as determined by the three-way analysis of variance for each of the three groups and for the total (30) recorders indicated a difference in perception as follows: administrators, .773; teachers, .618; college supervisors, .952; total (30) recorders, .961; 2.) the interview, normally considered a qualitative tool, can be evaluated with quantitative techniques; and 3.) administrators, teachers, and college supervisors perceive many areas of teacher competence similarly.     

Young Children's God Concepts: Influences of Attachment and Religious Socialization in a Family and School Context

This contribution offers an overview of two studies testing two attachment theoretical correspondence hypotheses in the prediction of individual differences in young children's God concepts. The correspondence hypothesis supposes that people's view on God parallels their images of their early caregiver–child relationship. The revised correspondence hypothesis incorporates caregiver religiosity and socialization. In the first study support was found for the correspondence hypothesis in the school context examining 72 preschoolers. In the second study the revised correspondence hypothesis was partly confirmed among 198 kindergarteners. Children cognitively learn about a powerful and comforting, helping God in their homes and schools, even when all relationships with their caregivers are experienced as negative. However, in such a surrounding they do not emotionally learn about an intimate, personal bond with God.     

Sociocultural approaches to learning and development: A Vygotskian framework

Sociocultural approaches emphasize the interdependence of social and individual processes in the coconstruction of knowledge. This article uses three central tenets of a Vygotskian framework to examine the relation between learning and development: (a) social sources of individual development, (b) semiotic (signs and symbols, including language) mediation in human development, and (c) genetic (developmental) analysis. The role played by culture and language in human development is an essential aspect of the Vygotskian framework and provides an overarching theme for this article. The methodological foundation of this framework is examined, particularly as it contrasts with other perspectives on the process of internalization of social interaction in the construction of knowledge. The article concludes by surveying sociocultural research on and applications to classroom learning and teaching, particularly that which examines the role of collaboration.