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1.
The Effects of Self‐ and Peer‐Monitoring in Social Studies Performance of Students with Learning Disabilities and Low Achieving Students 
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下载免费PDF全文 This study employed group randomized trials to investigate the effects of self‐ and peer‐monitoring on the academic vocabulary and content knowledge of students with learning disabilities and low achieving students in social studies. Fourth grade students were randomly assigned to either treatment or control groups on a class level. Results indicated that there was a significant interaction effect between the intervention and students’ pretest scores on academic vocabulary acquisition; the intervention was more effective for students with lower scores in the pretest than those with higher scores. In addition, there was a significant intervention effect on content knowledge acquisition; the effect size of the growth of the treatment group on the content knowledge test was significantly larger than that of the comparison group. Teacher interviews also revealed that teachers viewed the intervention positively. Implications for practice and suggestions for future research are discussed. 相似文献
2.
Yoo Sung-Sang Mosrur Ridwanul Lee Eunhye Andrea Diego Toca 《Asia Pacific Education Review》2019,20(2):259-272
Asia Pacific Education Review - The correlation between education and development, with time, went through many changes along with the changes of perspectives. Since both of these concepts... 相似文献
3.
Electric field-driven separation and purification techniques, such as isoelectric focusing (IEF) and isotachophoresis, generate heat in the system that can affect the performance of the separation process. In this study, a new mathematical model is presented for IEF that considers the temperature rise due to Joule heating. We used the model to study focusing phenomena and separation performance in a microchannel. A finite volume-based numerical technique is developed to study temperature-dependent IEF. Numerical simulation for narrow range IEF (6 < pH < 10) is performed in a straight microchannel for 100 ampholytes and two model proteins: staphylococcal nuclease and pancreatic ribonuclease. Separation results of the two proteins are obtained with and without considering the temperature rise due to Joule heating in the system for a nominal electric field of 100 V/cm. For the no Joule heating case, constant properties are used, while for the Joule heating case, temperature-dependent titration curves and thermo-physical properties are used. Our numerical results show that the temperature change due to Joule heating has a significant impact on the final focusing points of proteins, which can lower the separation performance considerably. In the absence of advection and any active cooling mechanism, the temperature increase is the highest at the mid-section of a microchannel. We also found that the maximum temperature in the system is a strong function of the ΔpK? value of the carrier ampholytes. Simulation results are also obtained for different values of applied electric fields in order to find the optimum working range considering the simulation time and buffer temperature. Moreover, the model is extended to study IEF in a straight microchip where pH is formed by supplying H+ and OH−, and the thermal analysis shows that the heat generation is negligible in ion supplied IEF. 相似文献
4.
Jago R Watson K Baranowski T Zakeri I Yoo S Baranowski J Conry K 《Journal of sports sciences》2006,24(3):241-251
The aims of this study were to: (1) determine whether the number of pedometer counts recorded by adolescents differs according to the adiposity of the participant or location on the body; (2) assess the accuracy and reliability of pedometers during field activity; and (3) set adolescent pedometer-based physical activity targets. Seventy-eight 11- to 15-year-old Boy Scouts completed three types of activity: walking, fast walking and running. Each type was performed twice. Participants wore three pedometers and one activity monitor during all activities. Participants were divided into groups of normal weight (BMI < 85th percentile) and at risk of being overweight (BMI > or = 85th percentile). Intra-class correlations across the three activities indicated reliability (r = 0.51 - 0.92, P < 0.001). This conclusion was supported by narrow limits of agreement that were within a pre-set range that was practically meaningful. Multivariate analysis of covariance indicated adiposity group differences, but this difference was a function of the increased stature among the larger participants (P < 0.001). Ordinary least-squares regression models and multi-level regression models showed positive associations between the number of pedometer and activity monitor counts recorded by the three groups of participants during all activities (all P < 0.001). The mean number of counts recorded for all participants during the fast walk was 127 counts per minute. In conclusion, the pedometers provided an accurate assessment of adolescent physical activity, and a conservative estimate of 8000 pedometer counts in 60 min is equivalent to 60 min of moderate to vigorous physical activity. 相似文献
5.
This paper presents a minimal-neural-networks-based design approach for the decentralized output-feedback tracking of uncertain interconnected strict-feedback nonlinear systems with unknown time-varying delayed interactions unmatched in control inputs. Compared with existing approximation-based decentralized output-feedback designs using multiple neural networks for each subsystem in lower triangular form, the main contribution of this paper is to provide a new recursive backstepping strategy for a local memoryless output-feedback controller design using only one neural network for each subsystem regardless of the order of subsystems, unmeasurable states, and unknown unmatched and delayed nonlinear interactions. In the proposed strategy, error surfaces are designed using unmeasurable states instead of measurable states and virtual controllers are regarded as intermediate signals for designing a local control law at the last step. Using Lyapunov stability theorem and the performance function technique, it is shown that all signals of the total controlled closed-loop system are bounded and the transient and steady-state performance bounds of local tracking errors can be preselected by adjusting design parameters independent of delayed interactions. 相似文献
6.
The amazing speed of innovations in the new media industry is now forcing major studios and publishers to search for promising startup companies to sustain their competitive edge. However, selection and valuation of startup companies, especially in the new media industry, is difficult to conduct because of the high amount of uncertainty. To understand and find the fair value of startup companies in the new media industry, we needed to investigate the key value drivers. In this study, we focused on the characteristics of uncertainty and the resource-based view of the firm and empirically analyzed the market value of startup companies based on the case of the online games industry in Korea. Results showed that the product development stage, market size, the ease of lock-in, technological competency, and a key talent are the five major key value drivers of startup companies in the Korean online games industry. 相似文献
7.
Present U.S. local exchange employment is less than half of what it was in 1981. This study tests several alternative explanations from labor economics, industrial organization, and political economy for employment reductions by U.S. local telephone companies. It evaluates the relative strength of the relationship between each explanatory factor and employment change. The contributions of six potential explanatory factors (wages, sales, technological change, competition, productivity, and profit rate) were investigated. Regression equation models were formulated and tested using crosssectional time-series data on 50 local carriers who provided 90% of the service between 1988 and 1995. We found that digitalization and productivity increases were the most important factors in explaining employment reductions by firms. Wage increases and computerization were significant sources for employment reduction only in the short term. 相似文献
8.
The Influence of James C. McCroskey’s Research in South Korea 总被引：1，自引：1，他引：0
In honor and remembrance of Dr. James C. McCroskey, this article looks at McCroskey’s influence in Korean academic fields. We find that McCroskey’s scholarly articles and books were increasingly cited from 2001 to 2016 and that his work has been cited in Korean journals across diverse fields. In addition to the communication and education fields, McCroskey was cited also in the fields of science and medicine in South Korea. The findings document the international and interdisciplinary impact of McCroskey’s scholarship. 相似文献
9.
Jae-woong Yoo 《亚洲交流杂志》2013,23(6):620-636
This study examined the effects of congruence between an organization and its goodwill ambassador in terms of audience attitudes and preferences regarding the organization and the ambassador's own perceived credibility. The analysis showed that audience attitudes and preferences toward the organization and goodwill ambassador's credibility ratings were, generally, more positive with higher levels of celebrity-organization congruence. Comparison of the ambassador's perceived credibility before and after exposure to the campaign showed a significant decline for low congruence, and either no statistical difference or a negative effect for high congruence. The results suggest a need for both the organization and the potential ambassador to take into account the level of congruence, the former when considering the effect with the public from using a celebrity as an ambassador, and the latter when considering his or her personal image management. Theoretical and managerial implications as well as directions for future research are discussed. 相似文献
10.
The main contribution of this paper is to develop an adaptive output-feedback control approach for a class of uncertain nonlinear systems with unknown time-varying delays in the pure-feedback form. Both the non-affine nonlinear functions and the unknown time-varying delayed functions related to all state variables are considered. These conditions make the controller design difficult and challenging because the output-feedback controller should be designed using only the output information. In order to overcome these conditions, we design an observer-based adaptive dynamic surface controller where the time-delay effects are compensated by using appropriate Lyapunov–Krasovskii functionals and the function approximation technique using neural networks. A first-order filter is added to the control input to avoid the algebraic loop problem caused by the non-affine structure. It is proved that all the signals in the closed-loop system are semi-globally uniformly bounded and the tracking error converges to an adjustable neighborhood of the origin. 相似文献