网络教学中学习者行为研究     

胡亮  匡哲君  努尔布力  解男男  赵阔 《高等理科教育》2012,(6):54-58

网络教学摆脱了传统教学时间和地域因素的限制,但是现有的网络教学只是简单地将学习内容进行堆积和罗列,不同学习背景的学习者难以分辨哪一部分是适合自己的学习内容,严重影响了网络教学的效果。本文通过对学习者学习行为的判断,为学习者推荐合适的学习序列,从而达到针对不同学习者的行为,为学习者设计不同学习策略的目的。  相似文献   

商务网络信息生态链结构模型构建     

许孝君  张海涛  瓮毓琦  刘阔 《图书情报工作》2013,57(15):50-55

以生态学及信息生态链理论为研究基础,对商务网络信息生态链的含义及特征进行分析,深入探讨商务网络信息生态链的组成部分,明确阐述商务网络信息生态链的三大结构要素——"节点"、"节点关系"及"链接模式";在此基础上,借鉴"价值链"、"供应链"及"复杂系统论"等相关理论研究方法,从信息、信息主体、信息环境及信息技术4个因素出发,构建商务网络信息生态链的结构模型。  相似文献   

User acceptance of mobile e-government services: An empirical study     

Shin-Yuan Hung  Chia-Ming Chang  Shao-Rong Kuo 《Government Information Quarterly》2013

The traditional focus of e-government services research has been on non-mobile services but now with the incorporation of mobile services more people are able to access these Mobile e-government services (m-government services). In addition, such services are critical for improving user-to-government communication effectiveness and maintaining relationships. The purpose of this study is to identify the factors that determine user acceptance of these services. Based primarily on the theory of planned behavior and supplemented by the mobile communication perspective, a sample of 331 users of m-government services in Taiwan was tested. The findings show that perceived usefulness, perceived ease of use, trust, interactivity, external influence, interpersonal influence, self efficacy, and facilitating conditions are critical factors. This study has given us a better understanding of critical mobile communication factors in improving user acceptance of m-government services. Implications and recommendations for research and practice are also presented and discussed.  相似文献   

Fractionated evaluation of immunohistochemical hormone receptor expression enhances prognostic prediction in breast cancer patients treated with tamoxifen as adjuvant therapy     

Ching-hung LIN  Huang-chun LIEN  Yen-shen LU  Sung-hsin KUO  Ann-lii CHENG  King-jen CHANG  Chiun-sheng HUANG 《Journal of Zhejiang University. Science. B》2010,11(1):1-9

Objective:To compare the prognostic prediction between dichotomized and fractionated evaluations of hormone receptor expressions. Methods: Patients with stages I-III breast cancers, who received adjuvant tamoxifen, were enrolled. The expression of estrogen receptor (ER) and progesterone receptor (PR) was evaluated by immu-nohistochemistry (IHC). A fractionated score (F score), the percentage of positive-staining nuclei (0=none, 1=1%-10%, 2=11%-30%, 3=31%-50%, 4=51%-70%, and 5=71%-100%), was assigned to each...  相似文献   

基于交易费用视角的生猪供应链上游结构变化趋势研究     

胡凯  高阔 《九江师专学报》2007,26(6):77-81

生猪供应链上游有两种结构：猪贩作为中间商模式和直接交易模式。论文分别从交易三维度视角和模型化交易费用的视角，对两种结构中的交易费用进行了比较。结果表明，随着饲养规模的扩大，生猪供应链上游的结构方式将向直接交易模式转变。  相似文献   

Acquisition of Chinese characters: the effects of character properties and individual differences among learners     

Li-Jen Kuo  Ying Li  Mark Sadoski  Tae-Jin Kim 《Contemporary educational psychology》2014

Drawing upon research on the visual complexity effect and Dual Coding Theory, this study investigated a) the effects of character properties on, and b) the contribution of individual learner differences to Chinese character acquisition. Participants included 325 Chinese-speaking children in grades 1 through 3 in China. Using a novel character acquisition task, the study extended the scope of previous research by investigating the process of acquiring the meaning of new characters. Results showed that for all three grade-groups, a) characters with radicals and with less visual complexity were easier to acquire than characters without radicals and with greater visual complexity; and b) the effect of radical presence was more pronounced with characters with greater visual complexity. Visual analogical skill made a significant contribution to the acquisition of characters varying in properties, regardless of age. The contribution of radical awareness, however, varied with character properties and age.  相似文献   

“海葵”台风路径及其强度分析     

廖廓  蔡晓禾  曾瑾瑜 《闽江学院学报》2013,34(2):128-131

＂海葵＂是在高纬生成的台风,大部分时间活跃在北纬25度以上,在北部副热带高压环流、大陆高压环流引导和自身内力作用下,＂海葵＂台风路径较为稳定,一路沿偏西方向前进.本次过程中,中纬度西风槽和冷空气位置偏北,没有冷空气侵入＂海葵＂台风环流,因此中纬度系统其实不利于＂海葵＂台风生命史的延长.＂海葵＂台风登陆后减弱缓慢,原因之一是没有受到台湾地形的阻挡,另一重要原因是登陆后有源源不断的水汽输送.此外,由于台风登陆前高层由辐合转为辐散,其抽吸作用也有利于台风强度的维持.  相似文献   

A comprehensive update: gastrointestinal microflora,gastric cancer and gastric premalignant condition,and intervention by traditional Chinese medicine     

Yuting LU  Huayi LIU  Kuo YANG  Yijia MAO  Lingkai MENG  Liu YANG  Guangze OUYANG  Wenjie LIU 《Journal of Zhejiang University. Science. B》2022,23(1):1-18

With the recent upsurge of studies in the field of microbiology,we have learned more about the complexity of the gastrointestinal microecosystem.More than 30 genera and 1000 species of gastrointestinal microflora have been found.The structure of the normal microflora is relatively stable,and is in an interdependent and restricted dynamic equilibrium with the body.In recent years,studies have shown that there is a potential relationship between gastrointestinal microflora imbalance and gastric cancer(GC)and precancerous lesions.So,restoring the balance of gastrointestinal microflora is of great significance.Moreover,intervention in gastric premalignant condition(GPC),also known as precancerous lesion of gastric cancer(PLGC),has been the focus of current clinical studies.The holistic view of traditional Chinese medicine(TCM)is consistent with the microecology concept,and oral TCM can play a two-way regulatory role directly with the microflora in the digestive tract,restoring the homeostasis of gastrointestinal microflora to prevent canceration.However,large gaps in knowledge remain to be addressed.This review aims to provide new ideas and a reference for clinical practice.  相似文献   

Effects of an acute bout of exercise on serum soluble leptin receptor (sOB-R) levels     

Chung Bing Yang  Chung-Chief Chuang  Chung Sen Kuo  Chin Hsing Hsu 《Journal of sports sciences》2013,31(5):446-451

Abstract

We investigated the effects of an acute bout of exercise on serum soluble leptin receptor (sOB-R) concentrations. Eighteen male participants completed two different exercise sessions with intensities of 25% and 65% maximal aerobic capacity (VO₂max). In addition to the energy expenditure during exercise sessions being measured, blood samples were collected before exercise, and immediately, at 24 h, and at 48 h post-exercise to analyse sOB-R, leptin and insulin levels. At 24 h post-exercise, sOB-R and leptin concentrations at the 65% VO₂max were significantly different from those at the 25% VO₂max. Leptin levels at 48 h post-exercise were also significantly lower for the 65% VO₂max than for the 25% VO₂max (P < 0.01). In the 65% VO₂max session, the energy expenditure during exercise was significantly associated with leptin concentrations at 24 h and 48 h and sOB-R concentrations at 24 h post-exercise. However, no correlations were found between sOB-R and leptin at the three post-exercise time points. In conclusion, an acute bout of exercise with 920 kcal of output resulted in an increase in sOB-R levels at 24 h post-exercise. However, the changes in sOB-R levels due to an acute bout of exercise might not contribute to the delayed decrease observed for leptin.  相似文献   

Critical literacy and a picture-book-based dialogue activity in Taiwan     

Jun-min Kuo 《Asia Pacific Education Review》2009,10(4):483-494

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