The role of DHEA-S in the mood adjustment against negative competition outcome in golfers     

Hung-Tsung Wang  Shu-Man Chen  Shin-Da Lee  Mei-Chich Hsu  Kun-Ning Chen  Yuh-Feng Liou 《Journal of sports sciences》2013,31(3):291-297

Abstract

Several lines of evidence suggest that dehydroepiandrosterone sulphate (DHEA-S) is invariably consumed following different types of acute stress, implicating its role in stress coping and recovery. The role of DHEA-S in the mood adjustment against negative outcome for athletic competition has not previously been investigated. In the current study, 14 elite golfers participating in a major national golf tournament were subsequently divided into two groups according to their competition outcomes: made the cut (n = 8) and failed to make the cut (n = 8). The Profile of Mood States (POMS) inventory and plasma concentrations of DHEA-S and cortisol were measured 1 day before the beginning of competition (baseline) and 1, 3, and 5 days after the players' final competition, in the morning (08.00–08.30 h) under fasted conditions. Results showed that the total mood disturbance scores and DHEA-S were not changed for the group that made the cut throughout the entire observation period. DHEA-S concentration for the group that failed to make the cut fell significantly below baseline values on day 1 and remained lower for 5 days. The Depression subscale of the POMS for the group that failed to make the cut was increased only on day 1 post-competition, reflecting a situational reaction to the event. Cortisol concentration for the group that made the cut fell significantly below baseline values on day 1 only after competition and no change was observed for the group that failed to make the cut. In conclusion, although the overall mood state post-competition was well-maintained for those golfers who had a negative competition outcome, plasma DHEA-S concentration was reduced for 5 days, suggesting that it has a role in the coping mechanism against psychological challenge.  相似文献   

The impacts of a web-aided instructional simulation on science learning     

Ying-Shao Hsu  Rex A. Thomas 《International Journal of Science Education》2013,35(9):955-979

This research investigated the effects of selected characteristics of a web-aided instructional simulation on students' conceptual change, problem solving and transfer. A two-pronged research study was conducted using 117 students enrolled in a beginning meteorology course at Iowa State University. For the experimental design, the performances of three groups (the with-log group, the without-log group and the control group) were compared on post-test scores and a weather forecasting activity. No statistically significant differences ( p < 0.05) were found among the groups on these measures. However, follow-up interview data obtained from five diverse students in the treatment group showed that the simulation with authentic situations, multiple representations and the capability of reviewing previous actions supported science learning. For the student who was able to readily take advantage of the information contained in the log and graphs, the simulation exercises were quickly completed and a sufficient understanding of the concept was developed to transfer the newly-gained knowledge to new situations, weather forecast exercises. For others, the simulation was less effective. Only one interviewee showed all three stages of Goos and Galbraith's model of problem solving. This student also demonstrated a better understanding of how to transfer newly-gained knowledge to weather forecast exercises. The other four interviewees, who did not show the features of all the stages, needed the teachers' facilitation to develop their problem-solving skills in order to achieve optimal learning when using the instructional simulation.  相似文献   

Gaps in the Application of the Computer to Testing     

Tse-chi Hsu 《Educational Measurement》1989,8(3):4-4

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Understanding customer experiences in online blog environments     

Hsuan Yu Hsu  Hung-Tai TsouAuthor vitae 《International Journal of Information Management》2011,31(6):510-523

Blogs have recently become an influential medium and have demonstrated enormous marketing power. Consumers can freely conduct ongoing information searches through this new channel. However, the credibility of blogs plays an important role in creating opportunities for positive customer experiences that can shape consumers’ product/service purchase intentions and decisions. In light of this observation, this study proposes a theoretical framework that delineates the relationship among information credibility, customer experiences, and purchase intention in the blog environment. Data collected from 468 subjects in specific corporate blogs provide support for the proposed model using partial least squares (PLS). The results indicate that information credibility is critical for facilitating customer experiences, which, in turn, is necessary to enhance purchase intention. Additionally, greater involvement with blog significantly increases the effect of customer experiences on purchase intention. The detailed theoretical and managerial implications are presented.  相似文献   

Characterization of microfluidic mixing and reaction in microchannels via analysis of cross-sectional patterns     

Wei-Feng Fang  Miao-Hsing Hsu  Yu-Tzu Chen    Jing-Tang Yang 《Biomicrofluidics》2011,5(1)

For the diagnosis of biochemical reactions, the investigation of microflow behavior, and the confirmation of simulation results in microfluidics, experimentally quantitative measurements are indispensable. To characterize the mixing and reaction of fluids in microchannel devices, we propose a mixing quality index (M_qi) to quantify the cross-sectional patterns (also called mixing patterns) of fluids, captured with a confocal-fluorescence microscope (CFM). The operating parameters of the CFM for quantification were carefully tested. We analyzed mixing patterns, flow advection, and mass exchange of fluids in the devices with overlapping channels of two kinds. The mixing length of the two devices derived from the analysis of M_qi is demonstrated to be more precise than that estimated with a commonly applied method of blending dye liquors. By means of fluorescence resonance-energy transfer (FRET), we monitored the hybridization of two complementary oligonucleotides (a FRET pair) in the devices. The captured patterns reveal that hybridization is a progressive process along the downstream channel. The FRET reaction and the hybridization period were characterized through quantification of the reaction patterns. This analytical approach is a promising diagnostic tool that is applicable to the real-time analysis of biochemical and chemical reactions such as polymerase chain reaction (PCR), catalytic, or synthetic processes in microfluidic devices.  相似文献   

A Novice-Expert Study of Modeling Skills and Knowledge Structures about Air Quality     

Ying-Shao Hsu  Li-Fen Lin  Hsin-Kai Wu  Dai-Ying Lee  Fu-Kwun Hwang 《Journal of Science Education and Technology》2012,21(5):588-606

This study compared modeling skills and knowledge structures of four groups as seen in their understanding of air quality. The four groups were: experts (atmospheric scientists), intermediates (upper-level graduate students in a different field), advanced novices (talented 11th and 12th graders), and novices (10th graders). It was found that when the levels of modeling skills were measured, for most skills there was a gradual increase across the spectrum from the novices to the advanced novices to the intermediates to the experts. The study found the experts used model-based reasoning, the intermediates and advanced novices used relation-based reasoning, and the novices used phenomena-based reasoning to anticipate conclusions. The experts and intermediates used more bi-variable relationships in experimental design and anticipated conclusions, but used more multiple-variable relationships in identifying relationships. By contrast, the advanced novices and novices mostly used bi-variable relationships in all modeling skills. Based on these findings, we suggest design principles for model-based teaching and learning such as designing learning activities to encourage model-based reasoning, scaffolding one??s modeling with multiple representations, testing models in authentic situations, and nurturing domain-specific knowledge during modeling.  相似文献   

Peer mentoring among doctoral students of science and engineering in Taiwan     

Yii-nii Lin  Angela Yi-ping Hsu 《Asia Pacific Education Review》2012,13(4):563-572

This study describes the peer mentoring experience from doctoral student mentors?? point of view. Twelve science and engineering doctoral students participated in this phenomenology study. The findings suggest doctoral peer mentors served instrumental, psychosocial, buffering, and liaison roles; they passed on their social, professional, and academic knowledge to their mentees and tried to assist them in adapting to the culture of the lab and academia. The study identified a variety of factors that influenced their attitudes and behaviors as peer mentors and concluded this system would be beneficial to the learning and development of both individual students and lab teams. The aims of this study were threefold: first, to identify the importance and necessity of peer mentoring systems as part of the experience of working in labs in graduate school; second, to ascertain which interactions and factors in the peer mentoring relationship benefitted both peer mentors and peer mentees; and third, to explore what might constitute best practices in the peer mentoring relationship.  相似文献   

A framework of cloud-based virtual phones for secure intelligent information management     

Jiun-Hung Ding  Roger Chien  Shih-Hao Hung  Yi-Lan Lin  Che-Yang Kuo  Ching-Hsien Hsu  Yeh-Ching Chung 《International Journal of Information Management》2014

As mobile networks and devices being rapidly innovated, many new Internet services and applications have been deployed. However, the current implementation faces security, management, and performance issues, which are critical to the use in business environments. Migrating sensitive information, management facilities, and intensive computation to security hardened virtualized environment in the cloud provides effective solutions. This paper proposes an innovative Internet service and business model to provide a secure and consolidated environment for enterprise mobile information management based on the infrastructure of cloud-based virtual phones (CVP). Our proposed solution enables the users to execute Android and web applications in the cloud and connect to other users of CVP with enhanced performance and protected privacy. The organization of CVP can be mixed with centralized control and distributed protocols, which emulates the behavior of human societies. This minimizes the need to handle sensitive data in mobile devices, eases the management of data, and reduces the overhead of mobile application deployment.  相似文献   

台湾四位得奖SUPER教师之教学研究     

管贵贞  徐章华 《教育学术月刊》2013,(1):50-56

成为一位好老师是老师们的目标也是压力.台湾少子化现象日益明显,每个孩子都是宝,如何将宝贝教导成才是挑战老师智慧的工作.“全国”教师会办理的“SUPER教师奖”选拔,发掘出“全国”教师的学习楷模.研究者以其中四位SUPER教师的访谈为起点,观摩他们的上课情形,归纳分析其特质,整理其教学特色.研究发现,四位SUPER教师具有如下特质:态度超热血,拥有无比的热情和毅力,凡事优先考虑学生;教学超用心,活泼有趣的教学策略让人跃跃欲试;关心超全面,掌握学生身心各方面发展,才能对症下药.  相似文献   

Testing a screening procedure in the treatments for communication apprehension     

Brian L. Heuett  Chia‐Fang Hsu  Joe Ayres 《Communication Research Reports》2013,30(3):219-229

This study tested whether a screening procedure was effective in the treatments for communication apprehension (CA). Accordingly, individuals who were identified as having cognitive, affective, and behavioral source of CA were exposed to Visualization (cognitive). Systematic Desensitization (affective). Skills Training (behavioral), and Multiple treatment (combination of the three). Results indicated that exposing people to the matching intervention was slightly more effective in reducing CA than exposing them to other treatments.  相似文献