The current state of human performance technology: A citation network analysis of Performance Improvement Quarterly, 1988–2010     

Yonjoo Cho  Sung Jun Jo  Sunyoung Park  Ingu Kang  Zengguan Chen 《Performance Improvement Quarterly》2011,24(1):69-95

This study conducted a citation network analysis (CNA) of human performance technology (HPT) to examine its current state of the field. Previous reviews of the field have used traditional research methods, such as content analysis, survey, Delphi, and citation analysis. The distinctive features of CNA come from using a social network analysis approach to see relational and network patterns in the citation data. This CNA found that the Performance Improvement Quarterly network showed more widely but loosely connected and less centralized structural attributes than the human resource development network; the 10 most influential articles in the field were identified; frequently co‐cited articles were recognized as having a strong relationship by subsequent researchers; and five cohesive subgroups showed key topics in the field (performance, instructional design, performance support, organization/workplace, and transfer of training). Implications from the results of the CNA were elaborated on for future research in HPT.  相似文献   

Molecular diffusion analysis of dynamic blood flow and plasma separation driven by self-powered microfluidic devices     

Sung Oh Woo  Myungkeun Oh  Kyle Nietfeld  Bailey Boehler  Yongki Choi 《Biomicrofluidics》2021,15(3)

Integration of microfluidic devices with pressure-driven, self-powered fluid flow propulsion methods has provided a very effective solution for on-chip, droplet blood testing applications. However, precise understanding of the physical process governing fluid dynamics in polydimethylsiloxane (PDMS)-based microfluidic devices remains unclear. Here, we propose a pressure-driven diffusion model using Fick''s law and the ideal gas law, the results of which agree well with the experimental fluid dynamics observed in our vacuum pocket-assisted, self-powered microfluidic devices. Notably, this model enables us to precisely tune the flow rate by adjusting two geometrical parameters of the vacuum pocket. By linking the self-powered fluid flow propulsion method to the sedimentation, we also show that direct plasma separation from a drop of whole blood can be achieved using only a simple construction without the need for external power sources, connectors, or a complex operational procedure. Finally, the potential of the vacuum pocket, along with a removable vacuum battery to be integrated with non-PDMS microfluidic devices to drive and control the fluid flow, is demonstrated.  相似文献   

Examining barriers in technology-enhanced problem-based learning: Using a performance support systems approach     

Sung Hee Park  Peggy A. Ertmer 《British journal of educational technology : journal of the Council for Educational Technology》2008,39(4):631-643

This study focused on the barriers that middle school teachers faced when implementing technology-enhanced problem-based learning (PBL) in their classrooms. Using a human performance-based model, we interviewed teachers, administrators, university faculty and technical support staff to determine the perceived importance of multiple barriers to the implementation of technology-enhanced PBL. Twenty-one teachers, two school administrators and a project manager, two faculty members, and two technical support staff participated in the study. Interview data were supported by surveys, classroom observations and researchers' reflective journals. Results suggested that lack of a clear, shared vision was the primary barrier. Additional barriers included lack of knowledge and skills, unclear expectations and insufficient feedback. Recommendations to support teachers' efforts to integrate technology-enhanced problem-based learning are presented.  相似文献   

Finite element modeling for analysis of cracked cylindrical pipes     

SUNG Wen-pei GO Cheer-germ SHIH Ming-hsiang 《浙江大学学报(A卷英文版)》2007,8(9):1373-1379

The characteristic properties of shell element with similar shapes are used to generate a so-called super element for the analysis of the crack problems for cylindrical pressure vessels. The formulation is processed by matrix condensation without the involvement of special treatment. This method can deal with various singularity problems and it also presents excellent results to crack problems for cylindrical shell. Especially,the knowledge of the kind of singular order is not necessary in super element generation; it is very economical in terms of computer memory and programming. This method also exhibits versatility to solve the problem of kinked crack at cylindrical shell.  相似文献   

Effects of embedding a problem-posing-based learning guiding strategy into interactive e-books on students’ learning performance and higher order thinking tendency     

Han-Yu Sung  Shan-Feng Chen 《Interactive Learning Environments》2019,27(3):389-401

Owing to the popularity of tablet computers and smart phones, e-books have become an important medium for both formal and informal learning. However, conventional e-books are mainly designed to provide information in the form of multimedia, implying that students spend most of their time memorizing and comprehending what they read from e-books, while seldom engaging in higher order thinking. In this study, a problem-posing framework is proposed for developing an interactive e-book for guiding students to observe and pose questions. An experiment on an elementary school natural science course was conducted to demonstrate the effectiveness of the proposed approach. The participants were 46 fourth-grade students. From the experimental results, it was found that the problem-posing-guiding interactive e-book can significantly improve the students’ learning achievements, critical thinking tendency, and deep motive. It was also found that the proposed approach did not increase the students’ cognitive load owing to the provision of proper supports during the problem-posing process, which has generally been identified as a challenging task.  相似文献   

Hypermedia authoring with writing process guidance     

Kuo-En Chang  Yao-Ting Sung  Jie-Wen Zheng 《British journal of educational technology : journal of the Council for Educational Technology》2007,38(5):851-860

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A young child’s dialogic appropriation of programmable robots     

Sung Eun Jung  Kyunghwa Lee 《British journal of educational technology : journal of the Council for Educational Technology》2021,52(1):394-410

This qualitative case study explores a 6-year-old boy’s dialogic appropriation of programmable robots. The study was conducted in two robotics education programs for children aged four to seven. Drawing on Bakhtin’s (1981) notion of appropriation, we found that the focal child actively engaged with the programmable robots by (1) transforming the given features of the robots, (2) hybridizing the programming practice with the ordinary practices of his peer culture and (3) constructing his own perspective on the agency of robots and the meaning of programming. We argue that the ways in which the focal child engaged with the programmable robots went beyond mere adoption of the robots but rather took the form of dialog.  相似文献   

Optoelectrofluidic field separation based on light-intensity gradients     

Sanghyun Lee  Hyun Jin Park  Jin Sung Yoon    Kwan Hyoung Kang 《Biomicrofluidics》2010,4(3)

Optoelectrofluidic field separation (OEFS) of particles under light -intensity gradient (LIG) is reported, where the LIG illumination on the photoconductive layer converts the short-ranged dielectrophoresis (DEP) force to the long-ranged one. The long-ranged DEP force can compete with the hydrodynamic force by alternating current electro-osmosis (ACEO) over the entire illumination area for realizing effective field separation of particles. In the OEFS system, the codirectional illumination and observation induce the levitation effect, compensating the attenuation of the DEP force under LIG illumination by slightly floating particles from the surface. Results of the field separation and concentration of diverse particle pairs (0.82–16 μm) are well demonstrated, and conditions determining the critical radius and effective particle manipulation are discussed. The OEFS with codirectional LIG strategy could be a promising particle manipulation method in many applications where a rapid manipulation of biological cells and particles over the entire working area are of interest.  相似文献   

Evaluation of Corporate Training Programs: Perspectives and Issues for Further Research     

Sung Heum Lee  James A. Pershing 《Performance Improvement Quarterly》2000,13(3):244-260

Performance improvement interventions, including training, are investments that can yield identifiable payoffs for an organization in the form of better job performance. Evaluation is vital to continuous improvement of human performance in the workplace. Without measures of effectiveness, organizations do not know whether dollars are being spent wisely and, consequently, whether to continue, modify, or improve performance interventions. There are several approaches for the evaluation of training programs. Few adequately cover the broader perspective of performance improvement. Various schemes and terms are used to describe facets for evaluating training programs. However, sometimes different terms describe the same event. At other times, quite different training evaluation activities are discussed by different authors using the same terms. The present article reviews six overall evaluation perspectives of corporate training programs: Kirkpatrick's four‐level approach; the CIRO approach; Hamblin's five‐level approach; Florida State University approach; Indiana University approach; and Phillips' five‐level approach. And four research areas for further study are recommended: overall evaluation models, causal relationships between evaluation categories, systematic research on how to evaluate the various categories, and appropriate uses of the results of evaluations.  相似文献   

Exploring the behavioral patterns of an online knowledge-sharing discussion activity among teachers with problem-solving strategy     

Huei-Tse Hou  Yao-Ting Sung  Kuo-En Chang 《Teaching and Teacher Education》2009

The sharing of teaching-related knowledge may help teachers solve a variety of problems that they face, and the appropriate use of online knowledge-sharing activities is expected to assist teachers' knowledge-sharing. This study proposed an online knowledge-sharing discussion activity, integrated with a problem-solving strategy for teachers. Empirical observations are noted. The participants were 495 teachers, and quantitative content analysis, sequential analysis, and qualitative original protocol analysis were used to explore the content and patterns of teachers' discussion behavior. The study identified influences on and limitations of knowledge-sharing in the activity, from which suggestions were generated to be proposed to teacher educators.  相似文献