Xn+Yn=Zn n≥3时无整数解

本文利用首创的互补开方法,来证明此定理。     

Investigating the effects of multimedia input modality on L2 listening skills of Turkish EFL learners

The present study examined whether or not different input delivery modes have an effect on listening comprehension of Turkish students learning English at the university level. It investigated the effect of one single mode, which is audio-only, and three dual input delivery modes, which were audio-video, audio-video with target language subtitles and audio with PowerPoint presentation, on listening comprehension. The data have been gathered through: a listening proficiency exam, a topic familiarity questionnaire, listening comprehension tests, think-aloud protocols and a semi-structured focus group interview. Analysis of data demonstrated that the students’ listening comprehension scores were significantly lower in audio-video with subtitles mode. In addition to this, the students stated that they experienced most confusion and anxiety in understanding through audio-video with subtitles. Moreover, the students mentioned that they were most successful in the audio with PowerPoint presentation mode. Results also indicated that the students were influenced by their pre-university listening class experiences, meaning that they were most accustomed to the audio-only mode, and therefore felt most relaxed when they listened only.     

A young child’s dialogic appropriation of programmable robots

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.     

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

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.     

Intentional self‐embarrassment

This research explored how and why people intentionally embarrass themselves and how observers react to these embarrassments. Self‐reports prom 566 students at the University of Hawai'i and non‐students indicated that, first, they do intentionally and strategically employ behaviors that cause themselves embarrassment to achieve a variety of goals. Second, self‐embarrassors’ goals affected their tactic choices. Third, embarrassors’ goals were associated with their successful achievement of these goals. Last, the tactics embarrassors used and the goals they attempted affected observers’ responses. Suggestions for modifying existing typologies of embarrassment situations/tactics and goals, as well as limitations and directions for future research are presented.     

Development of a personalized educational computer game based on students’ learning styles

In recent years, many researchers have been engaged in the development of educational computer games; however, previous studies have indicated that, without supportive models that take individual students?? learning needs or difficulties into consideration, students might only show temporary interest during the learning process, and their learning performance is often not as good as expected. Learning styles have been recognized as being an important human factor affecting students?? learning performance. Previous studies have shown that, by taking learning styles into account, learning systems can be of greater benefit to students owing to the provision of personalized learning content presentation that matches the information perceiving and processing styles of individuals. In this paper, a personalized game-based learning approach is proposed based on the sequential/global dimension of the learning style proposed by Felder and Silverman. To evaluate the effectiveness of the proposed approach, a role-playing game has been implemented based on the approach; moreover, an experiment has been conducted on an elementary school natural science course. From the experimental results, it is found that the personalized educational computer game not only promotes learning motivation, but also improves the learning achievements of the students.     

A quantitative analysis of moral exemplars presented in moral education textbooks in Korea and Japan

This study is a comparative analysis of the characteristics of moral exemplars presented in moral education textbooks in Korea and Japan. The purpose of the study is to examine and compare moral values presented through the lives and stories of moral exemplars in the two countries that have moral education as an independent and separate subject based on the national curriculum. To this end, the study uses analytical criteria such as gender, nationality, social roles, historical backgrounds, and specific moral values in order to investigate characteristics of 307 moral exemplars in Korea’s and Japan’s most used moral education textbooks. The results show significant similarities and differences in moral exemplars between the two nations. In the case of the similarities, both countries emphasize moral autonomy and respect for human life. In the case of the differences, while Korea presents more historic figures as moral exemplars, Japan presents more students and ordinary people as moral exemplars.