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世界上有许多民族,在早期都有加工树皮以制服饰、用具的历史。流传至今的"树皮工艺"正是原始制造文化的遗留,当时生产材料匮乏,人们惯于从自然环境里寻找制作日常用品的原料,桦树、褚树是最常用于剥取树皮的树种。桦树耐寒,除有些品种的汁液可入药外,白桦树树皮在剥落后还可再生,人们把树皮当成纸,制成壶、箱、盆、桶,甚至还用于盖房和造船。经过处理后的桦树皮不仅柔软、防水、抗菌,而且透气、耐用,可以 相似文献
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Emiliya S. Egorova Alyona V. Borisova Leysan J. Mustafina Alina A. Arkhipova Rashid T. Gabbasov Anastasiya M. Druzhevskaya 《Journal of sports sciences》2014,32(13):1286-1293
AbstractResearch concerned with predictors of talent in football has highlighted a number of potentially important and partially inherited measures such as body size, anaerobic power, aerobic capacity, agility, psychological profile, game intelligence and susceptibility to injuries. Genotyping for performance-associated DNA polymorphisms at an early age could be useful in predicting later success in football. The aim of the study was to investigate individually and in combination the association of common gene polymorphisms with football player’s status. A total of 246 Russian football players and 872 controls were genotyped for 8 gene polymorphisms, which were previously reported to be associated with athlete status. Four alleles (ACE D, ACTN3 Arg577, PPARA rs4253778 C and UCP2 55Val) were first identified, showing discrete associations with football player’s status. Next, we determined the total genotype score (TGS, from the accumulated combination of the 4 polymorphisms, with a maximum value of 100 for the theoretically optimal polygenic score) in athletes and controls. The mean TGS was significantly higher in football players (52.0 (17.6) vs. 41.3 (15.5); P < 0.0001) than in controls. These data suggest that the likelihood of becoming a football player depends on the carriage of a high number of “favourable” gene variants. 相似文献
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Anastasiya Khomutova 《Sport in Society》2016,19(7):861-876
This study seeks to address a gap in research regarding the perspectives of coaches working within European teams comprising both domestic and immigrated players. In order to explore coaches’ experience in working with multicultural teams, semi-structured interviews were conducted with six head coaches of professional basketball teams in Central and Northern Europe (two in Czech Republic, two in Germany, two in Latvia) and analysed using qualitative thematic analysis. The study focused primarily on communication and interaction between immigrated players and coaches, and on strategies used by coaches to overcome problems arising within multicultural teams. The findings identified three main themes: differences in values between foreign and domestic players/coaches; the formation of ethnic subgroups in teams; and race as a potentially problematic factor in coach–athlete relationships. The implications of this study include noting the importance of educational programs for coaches focused on raising cultural awareness, and recognising the need for further studies in this relatively under-researched area. 相似文献
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Purpose: The purpose of this paper is to analyse knowledge systems and channels of innovation diffusion in Tajikistan. In particular, I look at the formation of agricultural advisory services (AASs) and how these provide a vital source of knowledge and innovation for farmers during the transition process.
Methodology: Empirically, this paper draws on qualitative, ethnographic research in the agricultural sector of Tajikistan, that is, semi-structured and in-depth interviews with agricultural experts, and a ‘farm diary’ that provided data on farmers’ perspectives regarding access to knowledge and expertise.
Findings: Following the dissolution of the Soviet Union and the civil war in Tajikistan, knowledge available to farmers can be described as a mix of traces and fragments originating from the Soviet agricultural and educational system represented by universities, research institutes and academies of science, on the one hand, and Western-style knowledge, mainly introduced by development agencies, on the other. Donors are relatively new actors in the field of knowledge dissemination, but they are nevertheless very important ones. Under the ‘development’ framework, that is, rhetorical, organisational and infrastructural development, different donors play their own parts, some of them geo-political. At the same time they provide support for the functioning of local non-governmental organisations and help to maintain them accordingly, and they are also used by Tajik political actors for their own purposes.
Practical implications: From this discussion, practical suggestions are made on how AASs could be organised in Tajikistan, namely on existing assets, traditions and networks, thus reflecting the interplay between the main actors and local needs. 相似文献
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Carolyn MacCann Anastasiya A. Lipnevich Jeremy Burrus Richard D. Roberts 《Learning and individual differences》2012,22(2):235-241
This study examines whether problem-focused, emotion-focused, and avoidant coping strategies predict key outcomes in a sample of 354 high school students. The four outcomes considered are: academic achievement, life satisfaction, positive feelings towards school, and negative feelings towards school. Results demonstrate that coping incrementally predicts all four outcomes above and beyond the effects of the Big Five personality factors, vocabulary, and demographic variables. Incremental prediction is strongest for school feeling variables, where coping predicts 17.4% of the variance in positive feelings, and 15.9% of the variance in negative feelings. All three coping styles are important in predicting different outcomes: problem-focused coping predicts grades, life satisfaction, and positive feelings about school; emotion-focused coping predicts negative feelings only; and avoidant-focused coping predicts both positive and negative feelings about school. Results suggest that coping styles are an important variable for school outcomes, and that the effectiveness of different strategies differs depending on the outcome considered. 相似文献
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Anastasiya A. Lipnevich Jeffrey K. Smith 《Educational Assessment, Evaluation and Accountability》2009,21(4):347-367
The current study examined students’ perceptions of the effects of different forms of instructional feedback on their performance,
motivation, and emotion. Forty-nine students attending an eastern US university participated in focus group discussions. The
groups explored students’ reactions to grades, praise, and computer versus instructor provided feedback, as well as students’
views of the ideal feedback. Students named detailed comments as the most important and useful form of feedback. Grades were
deemed to be unnecessary if the goal of an activity was to learn. Students proposed that low grades elicit negative affect
and damage the students’ sense of self-efficacy, and high grades decrease motivation and lessen students’ perceived need to
improve. Praise was reported to positively affect emotion, but not to be directly conducive to learning. 相似文献
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Anastasiya A. Lipnevich Leigh N. McCallen Katharine Pace Miles Jeffrey K. Smith 《Instructional Science》2014,42(4):539-559
The current study examined efficient modes for providing standardized feedback to improve performance on an assignment for a second year college class involving writing a brief research proposal. Two forms of standardized feedback (detailed rubric and proposal exemplars) were utilized is an experimental design with undergraduate students (N = 100) at three urban college campuses. Students completed a draft of a proposal as part of their course requirements and were then randomly assigned to receive a detailed rubric, proposal exemplars, or a rubric and proposal exemplars for use in revising their work. Analyses of students’ writing from first draft to second draft indicated that all three conditions led to improvements in writing that were significant and strong in terms of effect size, with the stand-alone detailed rubric leading to the greatest improvement. Follow-up focus groups with students indicated that a stand-alone rubric potentially engages greater mindfulness on the part of the student. Practical implications are discussed. 相似文献
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Thomas Goetz Oliver Lüdtke Ulrike E. Nett Melanie M. Keller Anastasiya A. Lipnevich 《Contemporary educational psychology》2013
This study investigated the relations between eight characteristics of teaching and students’ academic emotions (enjoyment, pride, anxiety, anger, helplessness and boredom) across four academic domains (mathematics, physics, German, and English). 121 students (50% female; 8th and 11th graders) were asked about their perceptions of teaching characteristics and their academic emotions using the experience sampling method (real-time approach) for a period of 10 school days, with intraindividual analyses conducted using a multilevel approach. Multilevel exploratory factor analysis revealed that the eight teaching characteristics (understandability, illustration, enthusiasm, fostering attention, lack of clarity, difficulty, pace, level of expectation) represented two factors, labeled supportive presentation style (e.g., comprising understandability) and excessive lesson demands (e.g., comprising difficulty). In line with our hypothesis, we found clear relations on the intraindividual level between the two factors of teaching characteristics and students’ academic emotions in the classroom (e.g., supportive presentation style positively related to students’ enjoyment and negatively related to their boredom). Further, and supporting the universality assumption of teaching characteristics/academic emotions relations, the strength of relations between the two factors of teaching characteristics and academic emotions was very similar across the four academic domains. Implications for future research and educational practice are discussed. 相似文献