The Crisis of communication: Videotext,the internet and innovation in France and the United States     

《普罗米修斯》2012,30(3):305-315

This article compares videotext in France and the United States, the two advanced industrialized countries where videotext was the most and least successful, respectively, in order to demonstrate how videotext as a techno-political project foreshadows the explosive growth of the Internet as the dominant global communications platform. It draws upon the theory of network effects, in combination with a comparative analysis of both the institutional settings for research and development and political discourse, to explain how the interaction between state, market, and culture shaped network development and policy outcomes. Data are drawn primarily from official policy documents and trade journals from the era.  相似文献   

基于分布式聚合RSS的文件传输技术研究     

陈雪兆 《科技通报》2012,28(2):81-83

针对在无线网络中传输大规模数据时存在出错率高等问题,提出了一种基于改进型RSS算法的高效率文件传输算法。该技术基于分布式无线通信模式,服务器端建立基于Feed的分布式文件传输架构,通过协作通信的方式向客户端广播RSS更新消息,在无线文件传输控制信息的端到端时延和网络吞吐率上进行优化。实验表明所提出的技术与原RSS技术相比在无线文件传输的可靠性、实时性、资源利用率等方面具有良好的性能。  相似文献   

基于贝叶斯网络的人力资源管理模型     

洪海燕 《中国科技信息》2012,(9):157

贝叶斯网络(Bayesian Networks)是人工智能和数据挖掘领域中对不确定性问题进行推理和数据分析的一种工具,贝叶斯网络在人力资源中的应用也非常广,基于贝叶斯网络,分析人力资源管理中的主要因素,提出人力资源管理的贝叶斯网络构造方法,构建贝叶斯网络模型。  相似文献   

基于链路层切换技术的网络层快速切换方法     

徐志英 《南宁职业技术学院学报》2010,15(1):92-94

提出了一种新的网络层快速切换方法,该方法在链路层同步转发切换方法的基础上通过增加两个网络层切换实体来实现网络层快速切换,实现了IP移动检测的零时延。仿真结果表明,该基于链路层切换技术的网络层快速切换能够减少结点在子网间切换带来的时延,从而满足了实时应用的要求。  相似文献   

Can intermunicipal collaboration help the diffusion of E-Government in peripheral areas? Evidence from Italy     

Enrico Ferro  Maddalena Sorrentino 《Government Information Quarterly》2010

This paper analyzes the implementation of new intermunicipal structures in Italy to support the development of E-Government in the country's peripheral areas. Our exploratory case study, conducted in the Piedmont Region, shows that intermunicipal collaborations can facilitate the coordination of interdependent subjects, rationalize existing resources (e.g., through the reuse of application software solutions), and prevent the dispersion of federal government funds. Nevertheless, intermunicipal collaborations alone do not seem to have the power needed to ensure that decisions made at the central level will automatically translate into concrete and binding commitments for the municipalities involved. From a methodological standpoint, the article makes use of the analytical frameworks offered by organization science to interpret the effects of collaborative arrangements on E-Government implementation.  相似文献   

Strengthening Agricultural Education and Training in sub-Saharan Africa from an Innovation Systems Perspective: A Case Study of Mozambique     

Kristin E. Davis  Javier Ekboir  David J. Spielman 《The Journal of Agricultural Education and Extension》2013,19(1):35-51

Abstract

This paper examines how post-secondary agricultural education and training (AET) in sub-Saharan Africa can contribute to agricultural development by strengthening the capacity to innovate—to introduce new products and processes that are socially or economically relevant to smallholder farmers and other agents. Using the AET system in Mozambique as a case study, this paper examines the role of AET within the context of an agricultural innovation system. This innovation systems perspective offers an analytical framework to examine technological change in agriculture as a complex process of interactions among diverse actors who generate, exchange, and use knowledge, conditioned by complex social and economic institutions. The paper argues that while AET is conventionally viewed as key to the development of human capital, it also has a vital role to play in building the capacity of organizations and individuals to transmit and adapt information, products and processes, and new organizational cultures and behaviors. The paper emphasizes the importance of improving AET systems by strengthening the capabilities of organizations and professionals; changing organizational cultures, behaviors, and incentives; and building innovation networks and linkages. The paper offers several recommendations to enhance the effectiveness of AET for agricultural innovation and development. Key reforms include aligning the mandates of AET organizations with national development aspirations; inducing change in the cultures of AET organizations through the introduction of educational programs and linkages beyond the AET system; and enhancing innovative individual and organizational capacity by improving incentives to forge stronger links between AET and other stakeholders.  相似文献   

基于物联网和ZigBee的智能家居系统设计     

刘美  方湃盛  胡映良 《茂名学院学报》2013,(3):35-39

利用物联网和ZigBee技术设计了一个智能家居系统,使家居常用的分立设备通过无线网络进行组网、通信,构成一个相互联系、协同操作的整体,实现家居环境参数监控、防盗自动报警、火灾自动报警、燃气泄漏报警等,给用户带来最大程度的高效、便利、舒适与安全。  相似文献   

Cognitive load and knowledge sharing in Learning Networks     

Ya P. Hsiao  Francis Brouns  Liesbeth Kester  Peter Sloep 《Interactive Learning Environments》2013,21(1):89-100

Learning Networks (LNs) are online social networks designed to support nonformal learning; they are therefore particularly suitable for self-directed learners. In LNs, learners need to construct knowledge through knowledge sharing with other participants. However, without support, learners have to organize knowledge sharing themselves and this could induce extraneous cognitive load. When working on complex learning tasks, this organizing process could have a detrimental effect on knowledge construction. To optimize cognitive load, we propose using a peer support system that applies the mechanisms of peer tutoring to support knowledge sharing. Its mechanisms reduce, we argue, the extraneous load imposed by having to organize knowledge sharing as well as induce germane load by directing the freed-up cognitive capacity to processes that contribute to knowledge construction.  相似文献   

When Transnational Civil Network Meets Local Context: An Exploratory Hyperlink Network Analysis of Northern/Southern NGOs' Virtual Network in China     

《Journal of International and Intercultural Communication》2013,6(1):40-60

Abstract

Nongovernmental organizations (NGOs) are important communicators in the international arena, but few studies have explored the encounter between Northern NGOs (NNGOs) and Southern NGOs. This study examines how NNGOs build relationships with Chinese NGOs (CNGOs) online and how network positions affect the amount of local media coverage NNGOs receive. This study revealed three major findings: NNGOs occupied a disadvantageous network position; a close connection with CNGOs was crucial for NNGOs to attract media coverage; and NNGOs' and CNGOs' virtual networks demonstrated structural patterns similar to those of their offline networks. This study calls for attention to a mutually beneficial virtual communication structure.  相似文献   

Comparison of Alternative Channels in Cross Media Publishing     

Andreas Veglis 《Publishing Research Quarterly》2008,24(2):111-123

This paper attempts a direct comparison of the available alternative channels that can be employed in a cross media publishing scheme. More precisely it examines the content, the publishing speed, and the rhythm of the publishing channels. Interesting conclusions are drawn concerning the characteristics of each channel. A new publishing channel is proposed in order to allow newspapers to directly compete with radio and TV channels.  相似文献