高等教育自学考试面向农村服务网络体系建设

高等教育自学考试面向农村延伸是农村社会、经济发展的迫切要求,服务网络体系建设是实现高等教育自学考试向农村延伸的有效途径。探讨了高等教育自学考试向农村延伸的运作方式和有效途径,即建立以市、县、乡三级网站为硬件支撑,充分发挥宣传、管理、服务功能,教材资料(含电视教学片)与助学辅导体系相配套,强化实践环节教学与技能培养为主要内容的高等教育自学考试面向农村的服务网络体系。     

多媒体网络教学评价系统的探索

随着INTERNET的出现和普及,开发出一种与多媒体网络教学环境相适应的新的评价方式成为必要。本文旨在探讨利用网络环境开发出一种新的评价系统———多媒体网络教学评价系统,并对这个系统的主要结构、功能进行探讨。     

Buying into the food system: Trends in food retailing in the US and implications for local foods

The contemporary US food systemis characterized by both an unprecedentedconcentration of corporate control as well as afragmentation of sourcing and marketingprocesses, introducing both new constraints andnew opportunities for more localized foodsystems. The purpose of our study is to explorethese issues by investigating three keyquestions. First, what are the key trends inthe US grocery industry? Second, how dodifferent kinds of food outlets choose,procure, and promote food products? Finally,what are the implications of recent trends inthe food retailing process for strengtheninglocal flows of the production, distribution,and consumption of food? Background informationon the grocery industry and the results ofseven open-ended interviews conducted withowners and managers of grocery stores in oneupstate New York county indicate that theretailing process differs in complex ways fromstore to store and in most aspects cannot beinferred from store type. The paper concludeswith a discussion of the implications of ourfindings for local food system efforts,specifically in terms of new collaborationsamong producers, distributors, retailers, andshoppers, who play an indispensable role indeveloping viable alternatives to increasingcorporate control.     

信息化环境下网络伦理负面影响与策略

随着网络技术的快速发展，各种集资源、交易、交流于一体的网站、网络平台大量应用到人们的日常生活中．给人类的政治、经济、文化教育、社会生活方式等带来了深刻的变化，同时也带来了诸如信息欺诈、黄色泛滥、信息安全受损、网民人格异化等网络负面问题。本文针对网络负面问题的主要表现形式、虚拟世界伦理问题产生的根源及对策作探讨．寻求消除网络负面行为的有效途径和策略。     

网络时代图书馆学方法论的创新

本文回顾了图书馆学方法论的研究脉络，对网络时代下图书馆学方法论的创新做出了论述。     

浅析网络环境下农业科技图书馆的联合服务

在网络环境下,开展农业科技图书馆的联合服务很有必要,但存在管理模式落后,材料不规范、技术滞后、人员素质低等问题.对策是一重要新观念,变被动服务为主动服务;二要建设信息站点,提高Web的访问率,提供反馈窗口.注重资源库建设,提高工作效率;三要正确处理好联合开发利用与保护知识产权的关系.     

农民朋友,上网小心"网络钓鱼"

随着网络应用的迅速普及，“网络钓鱼”形式的网络欺诈案件给不少企业和个人用户带来了巨大的经济损失。本文结合具体案例，较为全面地剖析了网络骗子们常用的手段和方法，详细介绍了在进行电子商务活动时，怎样防范“网络钓鱼”。     

Network thinking in riverscape conservation – A graph-based approach

Graph theoretic approaches have received increased interest recently in landscape planning and conservation in the terrestrial realm, because these approaches facilitate the effective modelling of connectivity among habitats. We examined whether basic principles of graph theory can be extended to other ecosystems. Specifically, we demonstrate how a network-based context can be used for enhancing the more effective conservation of riverine systems. We first show how to use graph theoretic techniques to model riverscapes at the segment level. Then we use a real stream network (Zagyva river basin, Hungary) to examine the topological importance of segments in maintaining riverscape connectivity, using betweenness centrality, a commonly used network measure. Using the undirected graph model of this riverscape, we then prioritize segments for conservation purpose. We examine the value of each of the 93 segments present in the Zagyva river basin by considering the conservation value of local fish assemblages, connectivity and the size of the habitat patches. For this purpose we use the ‘integral index of connectivity’, a recently advocated habitat availability index. Based on the results the selection of the most valuable habitat segments can be optimized depending on conservation resources. Because of their inherent advantage in the consideration of connectivity relationships, we suggest that network analyses offer a simple, yet effective tool for searching for key segments (or junctions) in riverscapes for conservation and environmental management. Further, although the joint consideration of aquatic and terrestrial networks is challenging, the extension of network analyses to freshwater systems may facilitate the more effective selection of priority areas for conservation in continental areas.     

网络教育的协作学习研究

协作学习是一种非常重要的教学模式，对于培养具有创新能力、合作交流能力、自尊自强能力的人才具有重大意义。本文从协作学习的本质和概念入手，探讨了网络环境下协作学习的基本要素和四个教学环节。     

网络信息时代图书馆员的现代职能

本文简述了网络化时代，从事文献信息资源建设的馆员，肩负着数字资源组织和整理、利用和开发的使命。