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排序方式: 共有155条查询结果,搜索用时 10 毫秒
31.
32.
Sang-Kyoon Park Wing-Kai Lam Sukhoon Yoon Ki-Kwang Lee 《Sports biomechanics / International Society of Biomechanics in Sports》2017,16(3):374-386
This study investigated whether an increase in the forefoot bending stiffness of a badminton shoe would positively affect agility, comfort and biomechanical variables during badminton-specific movements. Three shoe conditions with identical shoe upper and sole designs with different bending stiffness (Flexible, Regular and Stiff) were used. Elite male badminton players completed an agility test on a standard badminton court involving consecutive lunges in six directions, a comfort test performed by a pair of participants conducting a game-like practice trial and a biomechanics test involving a random assignment of consecutive right forward lunges. No significant differences were found in agility time and biomechanical variables among the three shoes. The players wearing the shoe with a flexible forefoot outsole demonstrated a decreased perception of comfort in the forefoot cushion compared to regular and stiffer conditions during the comfort test (p < 0.05). The results suggested that the modification of forefoot bending stiffness would influence individual perception of comfort but would not influence performance and lower extremity kinematics during the tested badminton-specific tasks. It was concluded that an optimisation of forefoot structure and materials in badminton shoes should consider the individual’s perception to maximise footwear comfort in performance. 相似文献
33.
Pamara F. Chang Yoon Hyung Choi Natalya N. Bazarova Corinna E. Löckenhoff 《广播与电子媒介杂志》2015,59(2):221-239
This article extends socioemotional selectivity theory to online social networking by examining age differences in the size and composition of Facebook networks across a wide age range of Facebook users (18 to 93 years old) in a nationally representative sample. Findings suggest increasing selectivity of Facebook social partners with age. Compared to younger adults, friend networks of older adults are smaller but contain a greater proportion of individuals who are considered to be actual friends. Moreover, a higher proportion of actual to total Facebook friends is associated with lower levels of social isolation and loneliness across the life span. 相似文献
34.
Cancer heterogeneity has received considerable attention for its role in tumor initiation and progression, and its implication for diagnostics and therapeutics in the clinic. To facilitate a cellular heterogeneity study in a low cost and highly efficient manner, we present a microfluidic platform that allows traceable clonal culture and characterization. The platform captures single cells into a microwell array and cultures them for clonal expansion, subsequently allowing on-chip characterization of clonal phenotype and response against drug treatments. Using a heterogeneous prostate cancer model, the PC3 cell line, we verified our prototype, identifying three different sub-phenotypes and correlating their clonal drug responsiveness to cell phenotype. 相似文献
35.
Reading and Writing - This study examined how students of English as a foreign language (EFL) with different first language (L1) backgrounds use interactional metadiscourse markers in argumentative... 相似文献
36.
This study responds to a question that people working in the field of learning sciences get asked regularly: What do learning scientists do? Earlier attempts to answer this question came from a need to define a new field of educational research. Now that the International Society of the Learning Sciences (ISLS) has grown into a robust and productive society, it is time to gain a more nuanced understanding of learning sciences research and practices—including where it takes place, for whom, and in what form—as defined by members of the learning sciences community. Here we report on the responses of 253 ISLS members to a survey conducted in 2014. We discuss implications of the findings in terms of the type of impact learning scientists have. We also discuss how these results might be used to advise prospective students and to create a vision for our future. 相似文献
37.
Irene H. Yoon 《International journal of qualitative studies in education》2019,32(5):447-464
In this autoethnography, I inquire into naming the histories and dynamics behind some of the embodied and affective experiences I have had as a Korean American woman of color while studying up/down, across/within, in White-dominant professional spaces such as K-12 schools. This ‘in-between’ status is part of the nature of being Korean American. In this inquiry, I draw on vignettes from my experiences in the field as an ethnographic researcher. These experiences form the heart of the paper in the form of epigraphs and narratives from experiences in multiple studies to capture the reverberations of fleeting moments – hauntings – that have accumulated over time. In doing so, I am joining existing conversations about Korean American women and about researcher reflexivity and positionality, bringing them together across time and space. 相似文献
38.
This study investigated how Health Information National Trends Survey (HINTS) data from the U.S. National Cancer Institute (NCI) was cited in the scholarly literature. It addressed the following research questions: (1) What patterns of citations exist among authors of research articles using HINTS data? and (2) How is the citation format of HINTS data characterized? We collected scholarly articles that used HINTS data as primary or secondary data for analysis from Web of Science databases and HINTS publications on the NCI website. Among the resulting 250 articles, we identified citations to HINTS data themselves (data citations) and those to HINTS‐related documents (data‐related citations). Among the 250 articles, 156 articles (62.4%) cited HINTS data or HINTS‐related documents; only 29 articles (11.6%) cited HINTS data, while 127 (50.8%) cited HINTS‐related documents. Both data and data‐related citations increased over time. Data citation format varied, and 13 different compositions of citation elements were identified. Author, Title, and Location (URL) were common elements. The frequent use of URLs is undesirable due to URL instability. Furthermore, the data citations showed not only various compositions of citation elements but also ill‐defined element formats. Standardized citation formats are therefore needed. 相似文献
39.
This paper
reports on the efficacy of a professional development framework premised on
four complex systems design principles: Feedback, Adaptation, Network Growth
and Self-organization (FANS). The framework is applied to the design and
delivery of the first 2 years of a 3-year study aimed at improving teacher and
student understanding of computational modeling tools. We demonstrate that
structuring a professional development program around the FANS framework
facilitates the development of important strategies and processes for program
organizers such as the identification of salient system variables, effectively
distributing expertise, adaptation and improvement of professional development
resources and activities and building technological, human and social capital.
For participants, there is evidence to show that the FANS framework encourages:
professional goal setting, engagement in a strong professional community and
personal autonomy by enabling individualized purpose—all fundamental components
in promoting self-organization. We discuss three meta-level themes that may
account for the success of the FANS framework: structure versus agency,
exploration versus exploitation and short-term versus long-term goals. Each
illustrates the tension that exists between competing variables that need to be
considered in order to work effectively in real world complex educational
systems. 相似文献
40.