排序方式： 共有121条查询结果，搜索用时 15 毫秒
11.
Lin Chin-Hsi Kwon Jemma Bae Zhang Yining 《Educational technology research and development : ETR & D》2019,67(2):317-336
Educational technology research and development - In the traditional brick-and-mortar classroom, small classes are generally perceived as desirable, but the benefits associated with particular... 相似文献
12.
Brian A. Bottge Enrique Rueda Jung Min Kwon Timothy Grant Perry LaRoque 《Educational technology research and development : ETR & D》2009,57(4):529-552
The purpose of this randomized experiment was to compare the performance of high-, average-, and low-achieving middle school
students who were assessed with parallel versions of a computer-based test (CBT) or a paper-pencil test (PPT). Tests delivered
in interactive, immersive environments like the CBT may have the advantage of providing teachers with diagnostic tools that
can lead to instruction tailored to the needs of students at different achievement levels. To test the feasibility of CBT,
students were randomly assigned to the CBT or PPT test conditions to measure what they had learned from an instructional method
called enhanced anchored math instruction. Both assessment methods showed that students benefited from instruction and differentiated
students by achievement status. The navigation maps generated from the CBT revealed that the low-achieving students were able
to navigate the test, spent about the same amount of time solving the subproblems as the more advanced students, and made
use of the learning scaffolds.
相似文献
| Brian A. BottgeEmail: |
13.
This paper investigates a stability problem for linear systems with time-varying delays. By constructing suitable augmented Lyapunov–Krasovskii functionals, improved stability criteria under various conditions of time-varying delays are derived within the framework of linear matrix inequalities (LMIs). Moreover, to reduce the computational burden caused by the non-convex term including h2(t), how to deal with it is applied by estimating it to the convex term including h(t). Finally, three illustrative examples are given to show the effectiveness of the proposed criteria. 相似文献
14.
15.
In this paper, the problem of stability analysis for neural networks with time-varying delays is considered. By the use of a newly augmented Lyapunov functional and some novel techniques, sufficient conditions to guarantee the asymptotic stability of the concerned networks are established in terms of linear matrix inequalities (LMIs). Three numerical examples are given to show the improved stability region of the proposed works. 相似文献
16.
The purpose of this study was to develop a program to help cultivate divergent thinking in mathematics based on open-ended
problems and to investigate its effect. The participants were 398 seventh grade students attending middle schools in Seoul.
A method of pre- and post-testing was used to measure mainly divergent thinking skills through open-ended problems. The results
indicated that the treatment group students performed better than the comparison students overall on each component of divergent
thinking skills, which includes fluency, flexibility, and originality. The developed program can be a useful resource for
teachers to use in enhancing their students’ creative thinking skills. An open-ended approach in teaching mathematics suggested
in this paper may provide a possible arena for exploring the prospects and possibilities of improving mathematical creativity. 相似文献
17.
Mobile TV is a representative product of media convergence. In South Korea, the diffusion of mobile TV has been in high gear, which provides an exemplary case study of mobile-TV adoption. The study examines the relation between the social influence, adopters' individual factors, and the adoption of the 2 different forms of mobile TV: terrestrial and satellite. Factor analysis identified 3 dimensions of social influences, defined respectively as “affiliation,” “positive self-display,” and “perceived popularity.” Results suggest that these 3 social influences differ in degree in relation to the adopters' demographic characteristics and innovativeness. Adoption of terrestrial or satellite mobile TV was predicted by social influence and, in particular, driven by the motivation to maintain a positive self-image. Because of the implications this may have on media management, the article calls for future research on the social construction of new media technology use to assess how individuals become susceptible to social influences and how social influences affect the diffusion of the technology. 相似文献
18.
19.
Delay-dependent stability for uncertain cellular neural networks with discrete and distribute time-varying delays 总被引：1，自引：0，他引：1
In this paper, the problem of stability of uncertain cellular neural networks with discrete and distribute time-varying delays is considered. Based on the Lyapunov function method and convex optimization approach, a new delay-dependent stability criterion of the system is derived in terms of LMI (linear matrix inequality). In order to solve effectively the LMI as a convex optimization problem, the interior-point algorithm is utilized in this work. A numerical example is given to show the effectiveness of our results. 相似文献
20.
Perception of kinematic characteristics of tennis strokes for anticipating stroke type and direction
The purpose of this study was to determine the sources of visual information used by highly skilled tennis players in anticipating their opponent's shots. In Experiment 1, motion analysis of the strokes showed that the relative motion between the racquet and forearm was different between the ground strokes and lobs, but there were no reliable kinematic differences when shot direction was varied. In Experiment 2, 12 skilled tennis players observed the opponent hitting strokes in a normal video or in a point-light display with different segments occluded. Players' anticipation accuracy was not degraded by the use of the point-light display. Occluding the racquet and forearm significantly reduced the participant's ability to determine the type of stroke produced. 相似文献