The Concept of Information Overload: A Review of Literature from Organization Science, Accounting, Marketing, MIS, and Related Disciplines

Based on literature from the domains of organization science, marketing, accounting, and management information systems, this review article examines the theoretical basis of the information overload discourse and presents an overview of the main definitions, situations, causes, effects, and countermeasures. It analyzes the contributions from the last 30 years to consolidate the existing research in a conceptual framework and to identify future research directions.     

推荐系统在高校数字图书馆的应用研究

信息时代，数字图书馆连渐成为满足图书馆用户个性化服务的主要解决方案。本文在描述高校数字图书馆个性化服务的概念及其特点后，提出使用电子商务中的推荐系统采帮助实现高校数字图书馆的个性化服务的论点。文章中建立了高校数字图书馆推荐系统的框架模型．井在此基础上对高校数字图书馆推荐系统的组成、处理、以及推荐结果的形式进行了探讨，指出了适合本系统的推荐算法。     

互联网信息环境中信息超载问题研究

信息超载已经成了互联网环境下日益严重的问题。本文从客观和主观两个方面分析了信息超载的原因,然后分析了信息超载的危害,最后从技术方法和非技术方法两方面提出解决信息超载的措施。     

运动训练过程中大、小周期划分新探

用文献资料法综述和评论了马特维耶夫周期训练理论对当今训练实践的不足,并提出现代运动训练周期理论的发展趋势,指出训练应该根据运动员的实际水平安排周期,从实际出发,不可教条地按照马特维耶夫的周期训练理论进行训练.     

运动超负荷和压力超负荷大鼠心肌间质胶原重构与心肌局部RAS-ALD系统变化关系的研究

在SD大鼠运动超负荷和压力超负荷心肌肥大模型上发现,无论是一般运动负荷还是运动超负荷,心肌局部RAS系统均对心肌间质胶原重构起重要调节作用;ALd与心肌间质胶原的生理性重构无明显相关关系,主要参与其病理性重构,且与AngⅡ关系密切,上述结果表明,运动超负荷心肌间质胶原重构受RAS-ALd系统调节。     

Students’ attitudes towards online pre-laboratory exercises for a physics extended curriculum programme

Background: Students’ well preparedness for laboratory sessions is of importance for a number of reasons including them being able to engage in and learn from the session and in acquiring the necessary laboratory skills needed for the scientific community and for possible further work in industry. To enhance the preparedness of the students an online environment was designed, developed and implemented in a structured logical manner.

Purpose: The purpose of this exploratory study is to investigate student perceptions in a Science Extended Curriculum Program (ECP) of both the traditional pen and paper method they used in 2016, and the new online resource method they used in 2017 to better prepare them for Physics laboratories, and to compare the two methods.

Sample: N = 51 students from a first-year Extended Curriculum Programme in physics at a South African university voluntarily participated in this study.

Design and methods: The research was conducted using two non-standardised structured questionnaires where the enrolled ECP students were asked both open-ended – and closed questions (using a Likert response scale). Google Forms using graphs assessed these responses. An additional source of data was iKamva/Sakai which is the University of Western Cape’s institutional Learning Management (LMS) system, which allowed for detailed information regarding online activities.

Results: Four main research questions focussing on preparedness, time spent, lab activities and online resources were identified. Findings from these suggest that an introduction of an online environment positively affected the students’ perceptions of the online environment for pre-laboratory preparation in comparison with using traditional pen and paper.

Conclusions: The present study has successfully managed to both reveal that the introduction of online environment for Physics laboratories brought about some positive benefits as perceived by the students, as well as fruitful avenues for future research. While more work is needed, in terms of research and continuing evaluation of eLearning in Physics education, there is reason to be positive in terms of renewed emphasis to add blended learning within the broader Physics learning and teaching communities.     

限矩形液力偶合器常见故障及处理方法

限矩形液力偶合器是皮带驱动部位的主要部件,如果发生了故障皮带机就不能正常运行,有时甚至还会造成安全事故。本文主要介绍了限矩形液力偶合器在生产过程中经常遇到的故障及处理方法。     

基于DB-CF算法的音乐平台个性化推荐研究

娱乐方式日益丰富,产生巨量数据,利用这些数据通过推荐系统可以让用户获得更好的体验,为此提出了DB-CF（DBSCAN-Collaborative Filtering）算法。首先,使用DBSCAN聚类算法对音乐平台的线下用户进行聚类|然后,通过协同过滤算法计算对象用户与各聚类中心的相似度,再通过对比相似度度量矩阵,遍历离对象用户最近的邻居,通过邻居作出评分预测。实验表明,采用DB-CF算法比传统算法准确率提高8%左右,可以产生更准确的推荐结果,为用户带来更好的体验。     

Effects of combination of irbesartan and perindopril on calcineurin expression and sarcoplasmic reticulum Ca2＋-ATPase activity in rat cardiac pressure-overload hypertrophy

INTRODUCTION Left ventricular hypertrophy has been thought to be the principal predicators of predisposing risk factor of cardiac morbidity and mortality (Devereux, 1995; Levy et al., 1990). The pathogenesis that mediates cardiac hypertrophy is poorly understood. Cardiachypertrophy can be induced by hemodynamic over-load, ischemic disease, neurohumoral factors and intrinsic defects in cardiac structural protein genes (Sadoshima and Izumo, 1997; Vikstrom and Lein-wand, 1996). Another in…     

缝隙连接蛋白在心肌疾病时的重构及其与运动性心律失常的关系

采用回顾性研究和前瞻性分析相结合的研究方法,综述连接蛋白(Connexins.cxs)的生物学功能及其在不同类型心肌疾病下的变化规律.Cxs在肥厚性心肌病、心肌缺血,左室压力超负荷等心肌疾病时发生重构,力竭运动和大强度运动下诱导的心脏病理改变类似于心肌疾病状态,且运动实践证明力竭运动和大强度运动造成Cxs分布模式改变和表达降低,推测大强度、高负荷运动诱导的心律失常可能与运动诱导心脏Cxs改变有关.