Grounded blends and mathematical gesture spaces: developing mathematical understandings via gestures     

Caroline Yoon  Michael O. J. Thomas  Tommy Dreyfus 《Educational Studies in Mathematics》2011,78(3):371-393

This paper examines how a person’s gesture space can become endowed with mathematical meaning associated with mathematical spaces and how the resulting mathematical gesture space can be used to communicate and interpret mathematical features of gestures. We use the theory of grounded blends to analyse a case study of two teachers who used gestures to construct a graphical anti-derivative while working on a professional development task in a calculus modelling activity. Results indicate that mathematical gesture spaces can encourage mathematical experimentation, lighten the cognitive load for students and can be limited by a person’s physical constraints.  相似文献   

Theory development and convergence of human resource fields: Implications for human performance technology     

Yonjoo Cho  Seung Won Yoon 《Performance Improvement Quarterly》2010,23(3):39-56

This study examines major theory developments in human resource (HR) fields and discusses implications for human performance technology (HPT). Differentiated HR fields are converging to improve organizational performance through knowledge‐based innovations. Ruona and Gibson (2004) made a similar observation and analyzed the historical evolution and convergence of three HR‐related fields: human resource management (HRM), human resource development (HRD), and organization development (OD). A field left out in their analysis is HPT. Many learning professionals recognize HPT as a more comprehensive approach to improving organizational performance issues (Molenda & Pershing, 2008; Pershing, 2006). However, little research has been done to advance the theory development of HPT and discuss its relationships within HR fields. This study adds a new perspective to that of Ruona and Gibson's historical analysis of HR fields by examining convergence issues from a theory development perspective.  相似文献   

Effects of forefoot bending stiffness of badminton shoes on agility,comfort perception and lower leg kinematics during typical badminton movements     

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   

Age Differences in Online Social Networking: Extending Socioemotional Selectivity Theory to Social Network Sites     

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   

Traceable clonal culture and chemodrug assay of heterogeneous prostate carcinoma PC3 cells in microfluidic single cell array chips     

Jaehoon Chung  Patrick N. Ingram  Tom Bersano-Begey  Euisik Yoon 《Biomicrofluidics》2014,8(6)

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   

Expectations of and Attitudes toward Counseling: A Comparison of Asian International and U.S. Graduate Students   总被引：1，自引：1，他引：0  

Eunju Yoon  David A. Jepsen 《International journal for the advancement of counseling》2008,30(2):116-127

This study examined Asian international graduate students’ expectations of and attitudes toward counseling by using U.S. graduate students as a comparative reference group. Survey data from 189 Asian international and 186 U.S. students were subject to analyses. Results indicated that Asian international students, in comparison with U.S. students, indicated less exposure to counseling, less self-perceived need for counseling, greater discomfort/shame with counseling, less openness to counseling, a greater preference for a directive style, and a greater preference for a flexible counseling format. Language and cultural concerns were barriers to seeking counseling. Implications for culturally responsive services were discussed.  相似文献   

Interactions in EFL argumentative writing: effects of topic,L1 background,and L2 proficiency on interactional metadiscourse     

Yoon  Hyung-Jo 《Reading and writing》2021,34(3):705-725

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   

What Do Learning Scientists Do? A Survey of the ISLS Membership     

Susan A. Yoon  Cindy E. Hmelo-Silver 《学习科学杂志》2017,26(2):167-183

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   

Hauntings of a Korean American woman researcher in the field     

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   

How research data is cited in scholarly literature: A case study of HINTS     

JungWon Yoon  EunKyung Chung  Jae Yun Lee  Jihyun Kim 《Learned Publishing》2019,32(3):199-206

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