“概率论与数理统计”立体化教学模式研究与实践     

刘威  柴岩  齐俊玲  胡行华  王江  李娜 《现代教育技术》2009,19(3):138-140

针对概率论与数理统计教学中存在的"拥有立体化的教学资源却无法形成立体化的教育"问题,提出了以教学网站为核心的立体化教学模式,形成了一套完整的解决方案。通过教学实践解决了以往教学中存在的种种矛盾,实现了教学环节的增容,形成了立体化的教学,达到了教与学的双赢。  相似文献   

大学生运动性低钾血症研究进展     

姜琳玲  申晋波 《搏击·武术科学》2012,(1):122-124

运动性低钾血症是指剧烈运动后出现的低血钾症,是大学生体育运动中常见病症。文章参考大量相关文献,运用文献综述法,从钾在人体中的生理机制、低钾血症的病因、临床症状以及运动性低钾血症的可能机制和治疗方面,对大学生运动性低钾血症的研究进展进行探讨分析,旨在对运动性低钾血症深刻理解,为预防运动性低钾血症提供理论支持。  相似文献   

"Digit anatomy": a new technique for learning anatomy using motor memory     

Oh CS  Won HS  Kim KJ  Jang DS 《Anatomical sciences education》2011,4(3):132-141

Gestural motions of the hands and fingers are powerful tools for expressing meanings and concepts, and the nervous system has the capacity to retain multiple long-term motor memories, especially including movements of the hands. We developed many sets of successive movements of both hands, referred to as "digit anatomy," and made students practice the movements which express (1) the aortic arch, subclavian, and thoracoacromial arteries and their branches, (2) the celiac trunk, superior mesenteric artery and their branches, and formation of the portal vein, (3) the heart and the coronary arteries, and (4) the brachial, lumbar, and sacral plexuses. A feedback survey showed that digit anatomy was helpful for the students not only in memorizing anatomical structures but also in understanding their functions. Out of 40 students, 34 of them who learned anatomy with the help of digit anatomy were "very satisfied" or "generally satisfied" with this new teaching method. Digit anatomy that was used to express the aortic arch, subclavian, and thoracoacromial arteries and their branches was more helpful than those representing other structures. Although the movements of digit anatomy are expected to be remembered longer than the exact meaning of each movement, invoking the motor memory of the movement may help to make relearning of the same information easier and faster in the future.  相似文献   

Motivation Terminology in Reading Research: A Conceptual Review     

Kristin Conradi  Bong Gee Jang  Michael C. McKenna 《Educational Psychology Review》2014,26(1):127-164

Despite the importance of motivation in understanding the development and practices of reading, problems persist in how motivation-related constructs are defined and investigated. This article reports a concept analysis of how 12 terms have been used in current reading research. Selection criteria resulted in the identification of 92 data-based articles published in 28 peer-reviewed journals from 2003 to 2013. Over the period examined, there was a steady increase in the number of studies reported. Most were conducted in North America and Europe. Only 17 % of the studies offered explicit definitions of the target constructs they examined. Another 64 % relied on various forms of implicit definitions, and 19 % provided no definitions of any kind. Usage problems frequently occurred as well. These included instances of vague associations among terms, occurring in 20 % of the studies, synonymous reference to distinctly different constructs in 32 %, and inaccurate statements made about constructs in 20 %. Although a variety of motivation theories were used to ground the investigations, some 22 % were essentially atheoretical. These difficulties were unrelated to the impact factor of the journals in which they appeared. Possible causes are discussed, together with suggestions for improvement.  相似文献   

Challenges to Selective Exposure: Selective Seeking and Avoidance in a Multitasking Media Environment     

S. Mo Jang 《Mass Communication and Society》2014,17(5):665-688

The present research investigated selective exposure online, treating selective seeking and selective avoidance as independent phenomena. A behavior tracking measure was employed. Study 1 used an online quasi-experiment with voluntary national samples (n = 271). Consistent with early reviews on selective exposure, participants sought out attitude consonant information but did not systematically avoid attitude dissonant information compared to neutral information. Study 2 involved an experiment with student samples (n = 185) to examine the impact of cognitive load on selective behavior. The results revealed that those who were asked to multitask during an information search did not exercise any selectivity in information selection. The implications of information selection behavior in a multitasking media environment are discussed.  相似文献   

Exploring game experiences and game leadership in massively multiplayer online role‐playing games     

YeiBeech Jang  SeoungHo Ryu 《British journal of educational technology : journal of the Council for Educational Technology》2011,42(4):616-623

This study explored the in‐game experiences of massively multiplayer online role‐playing game (MMORPG) players focusing on game leadership and offline leadership. MMORPGs have enormous potential to provide gameplayers with rich social experiences through various interactions along with social activities such as joining a game community, team play and others. In this study, a total of 808 Korean online gameplayers participated in an online survey. Amongst them, 300 MMORPG players were used as the final sample group. The results showed that joining a game community and playing in teams may help players build their leadership experience in games. The findings also suggest that there is a significant positive relationship between in‐game leadership and offline leadership. However, there were no significant differences in gender regarding in‐game and offline leadership. This study suggests that MMORPGs offer a useful place where people can grow their leadership skills and potentially transfer them into the real world.  相似文献   

On-chip three-dimensional cell culture in phaseguides improves hepatocyte functions in vitro     

Mi Jang  Pavel Neuzil  Thomas Volk  Andreas Manz  Astrid Kleber 《Biomicrofluidics》2015,9(3)

The in vitro study of liver functions and liver cell specific responses to external stimuli deals with the problem to preserve the in vivo functions of primary hepatocytes. In this study, we used the biochip OrganoPlate^TM (MIMETAS) that combines different advantages for the cultivation of hepatocytes in vitro: (1) the perfusion flow is achieved without a pump allowing easy handling and placement in the incubator; (2) the phaseguides allow plating of matrix-embedded cells in lanes adjacent to the perfusion flow without physical barrier; and (3) the matrix-embedding ensures indirect contact of the cells to the flow. In order to evaluate the applicability of this biochip for the study of hepatocyte''s functions, Matrigel^TM-embedded HepG2 cells were cultured over three weeks in this biochip and compared to a static Matrigel culture (3D) and a monolayer culture (2D). Chip-cultured cells grew in spheroid-like structures and were characterized by the formation of bile canaliculi and a high viability over 14 days. Hepatocyte-specific physiology was achieved as determined by an increase in albumin production. Improved detoxification metabolism was demonstrated by strongly increased cytochrome P450 activity and urea production. Additionally, chip-cultured cells displayed increased sensitivity to acetaminophen. Altogether, the OrganoPlate seems to be a very useful alternative for the cultivation of hepatocytes, as their behavior was strongly improved over 2D and static 3D cultures and the results were largely comparable and partly superior to the previous reports on biochip-cultured hepatocytes. As for the low technical needs, this platform has the appearance of being highly applicable for further studies of hepatocytes'' responses to external stimuli.  相似文献   

Compositional question answering: A divide and conquer approach     

Hyo-Jung Oh  Ki-Youn Sung  Myung-Gil Jang  Sung Hyon Myaeng 《Information processing & management》2011

This paper describes how questions can be characterized for question answering (QA) along different facets and focuses on questions that cannot be answered directly but can be divided into simpler ones so that they can be answered directly using existing QA capabilities. Since individual answers are composed to generate the final answer, we call this process as compositional QA. The goal of the proposed QA method is to answer a composite question by dividing it into atomic ones, instead of developing an entirely new method tailored for the new question type. A question is analyzed automatically to determine its class, and its sub-questions are sent to the relevant QA modules. Answers returned from the individual QA modules are composed based on the predetermined plan corresponding to the question type. The experimental results based on 615 questions show that the compositional QA approach outperforms the simple routing method by about 17%. Considering 115 composite questions only, the F-score was almost tripled from the baseline.  相似文献   

Desalination characteristics for ceramics excavated from Taean shipwreck,Korea     

Sungyoon Jang  Byeongjik Nam  Daewoo Park  Hyoyun Kim  Chan Hee Lee  Jae Eun Yu 《Journal of Cultural Heritage》2013,14(3):229-237

The ceramic artefacts, excavated from ancient shipwrecks, are generally saturated with soluble salts, mainly NaCl, within the porous structure of ceramics. The salinity contents typically exhibit ionic and osmotic pressures to the ceramic microstructures, thus causing significant damages to the integrity of ceramic artefacts. While the utilisation of aqueous soaking methods is commonly accepted for effective desalination processes of ceramics, the relationships between the structural characteristics of ceramics and the desalination efficiency have not been demonstrated. In this study, we examined the desalination processes of various ceramics excavated from the Taean shipwrecks in South Korea to identify major controlling factors for the desalination processes. Our results indicated that the physical properties of ceramics including the water absorption and the pore size distribution greatly influence on the desalination process time and efficiency. It is also found that the surface condition of ceramic samples such as microstructural cracks on the glaze layer is a crucial component of the desalination characteristics. Nevertheless, the small residue of salts such as NaCl crystals were found in the microstructures of some ceramics after prolonged desalination periods. Therefore, it is important to control the humidity and temperature in the conservation environment for desalinated ceramic artefacts even after desalination.  相似文献   

Investigating the roles of perceived playfulness,resistance to change and self‐management of learning in mobile English learning outcome     

Rui‐Ting Huang  Syh‐Jong Jang  Krisanna Machtmes  David Deggs 《British journal of educational technology : journal of the Council for Educational Technology》2012,43(6):1004-1015

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