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41.
Information control processes designed to prioritize the most relevant information are important for enhancing the service experience of users. Gatekeeping is the process of filtering and disseminating information in online information services. This study investigates the effects of gatekeeping activities on information services and the resulting impact on the value of such services from a user's perspective in an information service environment characterized by online and offline transactions. Various hybrid gatekeeping activities are derived through focus group interviews with information services planners. A survey of information service users reveals values that could be obtained from the information services. The results of these two data gathering tools suggest an information service framework for hybrid environments. The findings enable the development of value-added information services for users through efficient information control in hybrid online and offline environments. 相似文献
42.
This study examined cross‐cultural differences in depression expression and help‐seeking behavior among college students in the United States and Korea. Results indicated that the Korean students showed more somatization tendency, negative affect, and negative help‐seeking behavior. Negative help‐seeking behavior of Korean students was shown to relate to somatization. Counseling implications are discussed. 相似文献
43.
Sung-Eun Kim Ju Hong Jun-Youl Cha Jung-Min Park Denny Eun Jaehyun Yoo 《Journal of sports sciences》2016,34(21):2114-2120
There are few studies on the relationship between skeletal muscle mass and balance in the young ages. We investigated the relationship between appendicular skeletal muscle mass, isokinetic muscle strength of lower extremity, and balance among healthy young men using relative skeletal muscle index. Thirty men were grouped according to relative appendicular skeletal muscle mass index: higher skeletal muscle group (n = 15) and lower skeletal muscle group (n = 15). Static and dynamic balance abilities were measured using the following: a test where participants stood on one leg with eyes closed, a modified Clinical Test of Sensory Interaction on Balance (mCTSIB) with eyes open and eyes closed, a stability test, and limits of stability test. The muscle strength of lower extremities was measured with an isokinetic analyser in hip, knee, and ankle joints. Participants with higher appendicular skeletal muscle mass were significantly more stable in maintaining dynamic balance than those with lower appendicular skeletal muscle mass. Moreover, appendicular skeletal muscle mass index was positively correlated with dynamic balance ability. Participants with higher appendicular skeletal muscle mass had stronger strength in the lower extremity, and there were significant differences in the isokinetic torque ratios between groups. From these results, it can be inferred that higher appendicular skeletal muscle mass relates to muscle strength and the alteration in the peak torque ratio of the lower extremity, contributing to the maintenance of balance. 相似文献
44.
INTRODUCTION Wireless mesh networks (WMNs) are ad-hoc networks with full or partial mesh topologies, where nodes can automatically establish and maintain mesh connectivity among themselves. Such a mesh topol- ogy provides each node multiple communication paths to reach its peers. In the presence of link failures caused by, for example, node failures or interference, information can be rerouted through alternative paths to the destination. WMNs have no fixed infrastructure and are easily… 相似文献
45.
Jae-Bong Yoo 《Journal of Philosophy of Education》2001,35(4):615-626
It is often taken for granted that Paul Hirst's switch from emphasis on liberal education to a social practices view of education is a radical one. This depends on how we understand the relation between the two views. From the perspective of a 'weak' interpretation I argue that Hirst's later position differs little from his earlier one in the light both of the relation between the forms of knowledge and social practices, and of the rationalistic character of Hirst's conception of social practices in their connection with education. 相似文献
46.
Many researchers who are interested in studying students’ online self-regulated learning (SRL) have heavily relied on self-reported surveys. Data mining is an alternative technique that can be used to discover students’ SRL patterns from large data logs saved on a course management system. The purpose of this study was to identify students’ online SRL patterns with the use of data mining techniques. We examined both self-reported self-regulation surveys and log files to predict online students’ achievements and found using log files was more powerful in predicting students’ achievements in an online course than self-reported survey data. Discussions to enhance teaching and learning practices with the use of data mining are provided. 相似文献
47.
Yang Seok Yoo 《Asia Pacific Journal of Education》2018,38(1):1-14
Numerous studies have attributed gender difference in mathematics achievement to various sociocultural influences. Singapore is a country of higher gender equality as represented in the Global Gender Gap Index and Singaporean girls perform as well or higher than boys in international mathematics assessments. This study develops a conceptual model to examine the relationship and effects of parental involvement in education, teacher efficacy, and students’ attitudes towards mathematics on mathematics achievement for Singaporean eighth grade students using Trends in International Mathematics and Science Study (TIMSS) 2011 data. The study finds that there is no significant gender difference in parental involvement in education and teacher efficacy and there is no gender difference in the attitude of like learning mathematics among Singaporean eighth grade students. The attitude of confidence in mathematics has positive and significant effect on mathematics achievement and the effect is greater for girls than boys. Parental involvement in education and teacher efficacy were found to have greater effect on girls’ confidence in mathematics than on boys’. As such, increasing involvement in mathematics education and providing positive reinforcement to raise girls’ self-confidence in mathematics by parents and teachers should be an integral part of any initiative to reduce gender gap in mathematics achievement. 相似文献
48.
This inquiry is an investigation of item response theory (IRT) proficiency estimators’ accuracy under multistage testing (MST). We chose a two‐stage MST design that includes four modules (one at Stage 1, three at Stage 2) and three difficulty paths (low, middle, high). We assembled various two‐stage MST panels (i.e., forms) by manipulating two assembly conditions in each module, such as difficulty level and module length. For each panel, we investigated the accuracy of examinees’ proficiency levels derived from seven IRT proficiency estimators. The choice of Bayesian (prior) versus non‐Bayesian (no prior) estimators was of more practical significance than the choice of number‐correct versus item‐pattern scoring estimators. The Bayesian estimators were slightly more efficient than the non‐Bayesian estimators, resulting in smaller overall error. Possible score changes caused by the use of different proficiency estimators would be nonnegligible, particularly for low‐ and high‐performing examinees. 相似文献
49.
Sung Jin Yoo 《Journal of The Franklin Institute》2019,356(11):5781-5800
This paper presents a connectivity-preserving approximation-free design strategy for the distributed synchronized tracking of uncertain nonlinear multi-agent systems with limited communication ranges. All nonaffine nonlinearities in pure-feedback form are assumed to be unknown. The main contribution of this paper is to achieve approximation-free synchronized tracking while preserving the initial interaction patterns among agents. To this end, each synchronization error term is individually transformed to a nonlinear error function with a predefined time-varying function. The local tracking laws using only the relative output information among agents are designed via these nonlinear error terms. The connectivity preservation and preassigned tracking performance of the proposed synchronized tracking system are recursively analyzed in the Lyapunov sense, without employing any function approximators and potential functions. Finally, the effectiveness and robustness of the proposed strategy are demonstrated through simulation examples. 相似文献
50.
A global decentralized low-complexity tracker design methodology is proposed for uncertain interconnected high-order nonlinear systems with unknown high powers. It is assumed that interconnected nonlinearities are bounded by completely unknown nonlinearities, rather than, a linear combination of high-ordered state variables. Compared with the existing decentralized results for interconnected nonlinear systems with known high powers, the decentralized robust controller, which achieves the pre-designable transient and steady-state tracking performance for each subsystem, is designed by employing nonlinear error surfaces with time-varying performance functions, regardless of unknown nonlinear interactions and high powers related to virtual and actual control variables. The proposed decentralized continuous robust low-complexity tracker is realized without the use of any adaptive or function approximation techniques for estimating unknown parameters and nonlinearities. The stability and preassigned tracking performance of the resulting decentralized low-complexity control system are thoroughly analyzed in the Lyapunov sense. Finally, simulation results on coupled underactuated mechanical systems are provided to show the effectiveness of the proposed theoretical result. 相似文献