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961.
INTRODUCTION A variety of desirable criteria for functions have been identified: balancedness, local and global ava-lanche characteristics, high nonlinearity, etc. These properties are also very important for cryptographic purpose. Obtaining optimal tradeoffs among so many properties is hard. If we take into account more crite-ria, it is more difficult to generate Boolean functions satisfying those properties purely by constructive algebraic methods. How to construct Boolean func-tions … 相似文献
962.
Anna Imus Brian Kim Frederick L. Oswald Stephanie Merritt Alyssa Friede Wrestring 《教育实用测度》2013,26(1):71-94
Investigations of differential item functioning (DIF) have been conducted mostly on ability tests and have found little evidence of easily interpretable differences across various demographic subgroups. In this study, we examined the degree to which DIF in biographical data items referencing academically relevant background, experiences, and interests was related to differences in judgments about access to these experiences by members of different gender and race subgroups. DIF in the location parameter was significantly related (r = –.51, p < .01) to gender differences in perceived accessibility to experience. No significant relationships with accessibility were observed for DIF in the slope parameter across gender groups or for the slope and location parameters associated with DIF across Black and White groups. Practical implications for use of biodata and theoretical implications for DIF research are discussed. 相似文献
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Grace A. Couture Kim D. Simperingham John B. Cronin Anna V. Lorimer Andrew E. Kilding Paul Macadam 《Sports biomechanics / International Society of Biomechanics in Sports》2020,19(5):633-651
ABSTRACT Wearable resistance training involves added load attached directly to the body during sporting movements. The effects of load position during running are not yet fully established. Therefore, the purpose of this research was to determine spatio-temporal and kinetic characteristics during submaximal running using upper, lower and whole-body wearable resistance (1–10% body mass (BM)). Twelve trained male runners completed eight 2-min treadmill running bouts at 3.9 m/s with and without wearable resistance. The first and last bouts were unloaded, while the middle 6 were randomised wearable resistance conditions: upper body (UB) 5% BM, lower body (LB) 1%, 3%, 5% BM and whole body (WB) 5%, 10% BM. Wearable resistance of 1–10% BM resulted in a significant increase in heart rate (5.40–8.84%), but minimal impact on spatio-temporal variables. Loads of 5% BM and greater caused changes in vertical stiffness, vertical and horizontal force, and impulse. Functional and effective propulsive force (2.95%, 2.88%) and impulse (3.40%, 3.38%) were significantly (p < 0.05) greater with LB5% than UB5%. Wearable resistance may be used to increase muscular kinetics during running without negatively impacting spatio-temporal variables. The application of these findings will vary depending on athlete goals. Future longitudinal studies are required to validate training contentions. 相似文献
967.
Hae Min Kim John Wiggins Lynda Sadusky 《Journal of Interlibrary Loan, Document Delivery & Electronic Reserve》2019,28(5):115-128
AbstractInterlibrary loan (ILL) services receive requests for resources that are available locally and form a major portion of canceled requests. The purpose of this study is to examine the relationship between requests canceled due to local availability and three aspects to identify impacts on ILL. The authors explored library service aspects such as collection format, the link resolver knowledge base, and discovery system functionality for potential influence on requests for locally available resources. Quantitative methods were used to identify evidence of different aspects’ impact through analysis of ILL borrowing request data. The most important finding was that the discovery system had impact on ILL services by improving retrievability of locally available resources published recently. The results suggest that a modern discovery system can efficiently provide more relevant results sourced from a carefully curated set of authoritative resources, save users’ time to access available materials, and reduce library staff members’ time and effort. This study will be helpful to libraries through its analysis of library services that impact the cancelation of ILL requests due to local availability and how those services may influence service improvement. 相似文献
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This article reports survey findings related to the current status and future trends of blended learning in workplace learning
settings from diverse cultures. This particular survey was conducted of 674 training and human resource development professionals
from five different countries, mostly from the Asia-Pacific region (i.e., China, South Korea, Taiwan, United States, and the
United Kingdom). The results show that blended learning will become a popular delivery method in the future of workplace learning
not only in Western countries but also in Asian countries. Still, the respondents indicated that there were several barriers
to blended learning; one of the most noticeable issues was their lack of understanding of blended learning. There is a pressing
need, therefore, to provide practitioners with guidance on how to implement blended learning in their organizations. Additionally,
among the countries surveyed, the results of the present study revealed that there were significant differences in the current
level of adoption of blended learning, the respondents’ attitudes toward and perceptions of blended learning, and the content
areas taught by blended learning. Respondents’ predictions related to emerging instructional strategies, technologies, and
evaluation techniques for blended learning are also reported. 相似文献
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Min Kyu Kim 《TechTrends》2009,53(6):12
ect Cornerstone
ECT Internship: Experiencing Privilege, Opportunity, and the Spirit of Giving 相似文献970.
Paul H. Kim 《Educational technology research and development : ETR & D》2009,57(3):415-435
This paper discusses an action research study focused on developing a mobile learning model of literacy development for underserved
migrant indigenous children in Latin America. The research study incorporated a cyclical action model with four distinctive
stages (Strategize, Apply, Evaluate, and Reflect) designed to guide constituencies involved in the study to design, test,
and enhance a mobile learning model. The findings, to date, reveal some of the contextual phenomena that create both challenges
and opportunities for a mobile learning model. From this, design strategies are evolving focused on sustained literacy exposure
for extremely marginalized (economically, educationally, geographically, and technologically) migrant indigenous children
who have no consistent access to a formal education system. 相似文献