高水平乒乓球运动员有力臂最大等长收缩力的评估

乒乓球是使用单侧上肢的一项运动,其特征是要进行重复多次高速且具爆发力的动作,无氧乳酸酵解代谢能力占有重要作用.研究对象与方法男女高水平乒乓球运动员(n=31).采用Takei5101握力计测量单侧上肢有力型和非单侧上肢有力型运动员的上肢最大等长收缩力.18名男运动员(平均年龄23.5±5.4岁)和13名女运动员(平均年龄21.3±3.3岁)均为西班牙乒乓球协会的国家联盟成员.采用SPSS v12.0 for windows和Excel v10.2软件包进行数据统计分析.研究结果发现无论男女运动员单侧上肢有力型的最大等长收缩力均高于非单侧上肢有力型,而左势手女运动员与右势手女运动员相比、右势手男运动员与左势手男运动员相比,单侧上肢有力型的最大等长收缩力均高于非单侧上肢有力型.研究还发现进攻型运动员与防守型运动员相比,单侧上肢有力型的最大等长收缩力高于非单侧上肢有力型.分析与讨论无论男女,单侧上肢有力型运动员手握力高于非单侧上肢有力型运动员.男性运动员比女性运动员的等长收缩力高,一个可以解释的事实是男性有更高的睾酮水平.肌肉力量不平衡可能发展成为脊柱侧弯姿态,这应该通过适当的力量和柔韧性训练来避免,以防止将来的运动损伤和运动成绩的下降.     

Assessing quality characteristics of center-based early childhood environments in Germany and Portugal: A cross-national study

Based on the knowledge that direct assessment of the quality of early childhood educational environments is becoming more and more important, this article deals with a coordinated adaptation of the Early Childhood Environment Rating Scale (ECERS) in Germany and Portugal. The ECERS, developed by Harms and Clifford (1980), is a complex rating scale, comprising 37 items, which is implemented to assess major quality characteristics of early childhood classrooms and has been used quite extensively in the US as well as in other countries. In this article we describe how the scale was adapted and we report selected results of a jointly coordinated comparative study on a sample of 103 early childhood classrooms in Germany and 88 in Portugal. The classrooms were classified according to three different types in each country. In particular, we report the item characteristics of the adapted versions, reliabilities and intercorrelations of the total scale and the apriori-subscales, and results of factor analyses. A one-way ANOVA indicates group differences between the six types of classrooms which can be meaningfully interpreted.     

Analysis of the Phonological Skills of Children with Down Syndrome from Single Word and Connected Speech Samples

Phonological analysis of the speech of five children with Down syndrome was compared across single word samples elicited from tests and connected speech samples elicited during play. Analyses indicated that connected speech samples provided fewer total words and word tokens and, in some cases, failed to target certain later developing phonemes. CVCs were similarly represented across single word and connected speech samples, but differences across the sampling conditions included an over‐representation of clusters and an under‐representation of VC and CV forms in single word samples. Overall accuracy for vowels was greater than for consonant production, but no difference in phoneme accuracy was found across the conditions. Differences in phonetic inventories for some subjects indicated the possibility that children may, in their connected speech, avoid phonemes which they have yet to master. Phonological process analysis indicated that differences across the two conditions were restricted to their relative impact on each subject's overall intelligibility. Both similarities and differences with previous studies comparing sampling conditions with other populations are discussed, as are clinical implications.     

Argumentative skill deficiency and its relationship to quality of marriage

This study investigates the relationship between verbal aggression, argumentativeness, and marital quality in a sample of non‐distressed couples. The traits of verbal aggression and argumentativeness are predicted to have different effects on marital quality; specifically, verbal aggression is hypothesized to have an inverse relation to marital quality while argumentativeness is posited to have a positive relationship. Results show support for the first hypothesis and partial support for the second hypothesis. Implications of these results for conflict resolution in marriage are discussed.     

Special collections in the classroom: embedding special collections in an undergraduate history writing class

Abstract

This article describes a 12-year collaboration between a special collections librarian and history faculty for an undergraduate history writing course at Vanderbilt University. Originally taught as a one-shot session, the final 9 years of the course embedded the class into Special Collections for 10 weeks of primary source research. This article describes the evolution of the course from a one-shot session to full embedding, the mechanics involved in managing the sessions in Special Collections, student support considerations, and tips for other librarians offering such sessions.     

Implementing Criterion-referenced Assessment Within a Multi-disciplinary University Department

This paper is concerned with the reconstruction, at the departmental level, of a university assessment policy that required a shift from norm-referenced assessment to criterion-referenced assessment (CRA). As such, it provides an account of a change process driven by a centralised policy imperative and yet implemented and driven also from a bottom-up process. A wide range of data was gathered using action research methods. Individual and focus group interviews were conducted with staff and students, participant journals were kept and successive drafts of criteria and standards, and samples of students' responses were collected. The data suggested that a top-down policy can be successfully combined with a departmental-driven process, if financial and time considerations are addressed and a collaborative process amongst staff is sustained. The use of action learning, as a tool for change, appeared to assist participants to begin to own a top-down policy.     

Neoliberal and disciplinary environmentality and ‘sustainable seafood’ consumption: storying environmentally responsible action

This article invokes a neoliberal and disciplinary governmentality lens in a political ecology of education framework to analyze educational programming at Long Beach, California’s Aquarium of the Pacific. I begin by briefly describing governmentality as Foucault and neo-Foucauldian scholars have theorized the concept, followed by a discussion of the emergence of green governmentality and environmentality in political ecology. Next, I invoke a political ecology of education framework informed by neoliberal and disciplinary environmentality to analyze institutional and teaching practice at the Aquarium. In this analysis, I demonstrate how the institution’s funding structure, placement within the entertainment markets of the southern California area, and commitment to ocean conservation education all influence how the Aquarium conceptualizes itself and its work. I focus on the case of the Blue Cavern Show and the Seafood for the Future program, which work in tandem to define a problem (declining fish stocks; possible seafood shortages) and then structure a neoliberal solution through the market (sustainable seafood consumption). I conclude by discussing the implications of this research for environmental education, which include unpacking how neoliberalism impacts teaching practice, especially as it relates to notions of framing environmentally responsible action.     

Hacking agency: Apps,autism, and neurodiversity

This essay examines the complex relationship between agency and technology. I compare autism apps developed by Samsung and Toca Boca and show that while app marketing retains a human-centered notion of agency, user–app interactions distribute agency through a constellation of human and nonhuman actors. The divergence between marketing and use, as well as critiques about agency and technology within disability studies, motivates my argument for hacking agency. Whether in computer or knowledge networks, hacking is a critical process that exploits information silos for particular ends. In this essay, I seek to broaden notions of rhetorical capacity and challenge narrow approaches to intentionality so as to facilitate the attribution of agency across the neurological spectrum.     

Not a one-shot deal: Generative professional development among experienced teachers

This study examines two experienced teachers’ transformations and sense of agency as they implemented a writer’s workshop curriculum with multi-lingual third grade students. Multiple lines of inquiry guide the study including communities of practice (Lave & Wenger, 1991), teacher identities in figured worlds (Holland, Lachicotte, Skinner, & Cain, 1998), and the ethic of care (Noddings, 1984/2003). A constant comparative method was used to analyze classroom observation notes, interviews and debriefing sessions (Glaser & Strauss, 1967). Findings indicate that teachers transformed their pedagogical practices around writing, and at the same time reconsidered what it may mean to become renewed professionals.     

Understanding user needs for citation management program support

Abstract

Citation management programs are tools used to organize references and to create citations and bibliographies. Libraries are often the central point for providing training and support in using these tools. To determine how we could improve our support and training services, we surveyed users to determine what software in being used, why they chose that particular program, what features are important, and how they use citation management programs to collaborate. Results indicate that users chose a particular program because it was freely available or recommended to them by others and that they thought that importing references and creating citations were important features. We also found a majority of respondents used citation management programs to collaborate and turned to the library for training and support.