物联网智能家居系统的设计与实现   总被引：1，自引：0，他引：1  

李怀亮  李美丽  张全禹  付兴烨 《绥化学院学报》2012,(2):190-192

设计利用STC89C516单片机为核心,实现了基于GSM网络的物联网家居自动化控制,对家庭环境中的各种信息进行采集,并以手机短信的方式通知给不在家中的用户。该系统合理地利用了GSM模块、nRF2401无线模块、12864液晶屏、DS12C887时钟芯片、ISD4004语音模块和多种传感器,实现了手机短信的交互控制、无线遥控、液晶显示、音频输出、传感器信号的采集和处理等功能。  相似文献   

移动时代高校图书馆的情境感知服务系统研究     

张剑 《新世纪图书馆》2012,(5):42-45,1

无线技术的飞速发展与无线设备的大量应用,为传统图书馆服务带来了极大的挑战论文将情境感知技术应用到高校图书馆服务中,提出情境感知图书馆服务系统的框架及实施流程,希望能够提高高校图书馆的信息服务质量。  相似文献   

关于网络新环境下图书馆期刊服务的探索     

牟达 《图书馆工作与研究》2012,(5):107-108

本文分析了当前图书馆期刊服务的现状,简要介绍了网络的一些新技术(云计算,无线网络,微博)的含义及对图书馆的应用,并提出图书馆可以引进这些技术创新期刊服务的网络化模式和方法。  相似文献   

WLAN中VoIP容量与呼叫准入控制研究     

徐建华  吴其林 《巢湖学院学报》2012,(3):24-29

无线局域网络(WLAN)中实现基于因特网协议的语音(VoIP)通信将面临两个主要的挑战:一是如何提升VoIP容量;二是如何通过准入控制来确保语音的服务质量。论文对以上两个方面的目前研究状态分别进行了详细的阐述:在VoIP容量研究方面,论文指出了VoIP容量在WLAN中还将受接入点瓶颈效应、协议开销、竞争资源的数据流以及多速率信道四种因素的影响;在准入控制方面,论文将目前的准入控制方案分为基于模型的准入控制策略和基于测量的准入控制策略,指出了两种方案的优缺点以及还需要解决的问题。  相似文献   

Evolution and Diffusion of the Michigan State University Tradition of Organizational Communication Network Research     

Alex M. Susskind  Donald F. Schwartz  William D. Richards  J. David Johnson 《Communication Studies》2013,64(4):397-418

This article documents the 30‐year history of communication network research at Michigan State University (M.S.U.), providing a case study of the evolution and diffusion of an academic innovation. Three past and continuing issues for network scholars are identified: a lack of professional reward for developing user‐friendly computer programs, unresolved methodological problems, and a need for better theoretical and conceptual frameworks. The narrative also illustrates the difficulty communication as a discipline has in impacting broader intellectual traditions. The story begins with the first doctoral dissertation (Schwartz, 1968 Richards, W. D. and Barnett, G., eds. 1993. Progress in communication sciences: Advances in communication network analysis, Norwood, NJ: Ablex.  [Google Scholar]) and the first network analysis software program in 1970 (Richards’ Negopy), continuing to the last dissertation (Susskind, 1996 Susskind, A. M. 1996. The impact of an organizational downsizing effort on survivors’ communication network relationships and attitudes, East Lansing: Department of Communication, Michigan State University. Unpublished doctoral dissertation [Google Scholar]), and ending in 1998 when J. David Johnson left the M.S.U. faculty. Other major players in the M.S.U. network tradition included David K. Berlo, Eugene Jacobson, Everett M. Rogers, Vincent Farace, Peter Monge, and Erwin Bettinghaus. Ironically, Schwartz and Susskind met in 1998 while Schwartz was preparing to retire from Cornell University and Susskind was starting as an Assistant Professor in a different department, thus providing closure to the M.S.U. network.  相似文献   

Narrative Capacity,Resistance Performance,and the “Shape” of New Social Movement Networks     

Joshua D. Atkinson  Laura Cooley 《Communication Studies》2013,64(3):321-338

The current research explored two new social movement networks in the United States in order to demonstrate the impact of narrative capacity on the “shape” of an activist network. In particular, we found that activists in a network that demonstrated efficient narrative capacity described the hub organization in positive terms, while activists in a network that demonstrated poor narrative capacity held mixed perceptions about the hub. Some activists in the second network held positive perceptions about the organization, while others held negative perceptions. The observations from these two research sites led us to conceptualize activists' differing perceptions about their respective hub organizations as “distance” that they experienced from that hub. Therefore, two different star shapes emerged from our research: a symmetrical star and elongated star. Such findings demonstrate the importance for narrative capacity in the construction and maintenance of effective activist networks.  相似文献   

(Trans)national Advocacy in the Ousting of Milošević: The Otpor Movement's Glocal Recursions     

Don J. Waisanen 《Communication Studies》2013,64(2):158-177

Over the past decade a remarkable number of revolutions worldwide imitated the touchstone youth movement Otpor, which played an influential role in ousting Serbian President Slobodan Milo?evi? in 2000. Given the continual presence of Western organizations and resources in Otpor's uprising, I argue that the movement demonstrates a type of communication termed glocal recursion—a rhetorical strategy that invites social change by imitating global methods of resistance, with slight variations, in local contexts. In addition to its time-based connotations (in which activists ground new messages in old texts), glocal recursion advances a space-based understanding of recursive appeals (with activists creating local messages from global structures). This essay analyzes four aspects of Otpor's glocal recursions, including its technological conditions, structured spontaneity, indigenous adaptations, and dialectical reappropriations. Various implications are drawn for communication research.  相似文献   

Challenges and Opportunities Associated With Social Network Research: An Examination of Emergent Methodological Issues     

Corey Jay Liberman 《Communication Research Reports》2013,30(4):359-365

Those who study social networks encounter an all-too-often conundrum in academia: the richness of data sets coupled with methodological complications. This article highlights three of the most salient issues facing social network scholars and potential ways of overcoming them. By discussing the quantitative measurement of the network in question, the specific variables under examination, and the overall goal(s) of the research project, readers will understand both the costs and rewards associated with an area of communication, psychology, and sociology scholarship that has existed and thrived for more than a half century.  相似文献   

Predicting Employee Turnover from Friendship Networks     

Thomas Hugh Feeley  Jennie Hwang  George A. Barnett 《Journal of Applied Communication Research》2013,41(1):56-73

Employees (n=40) at a fast-food restaurant were surveyed about characteristics of their position and their level of satisfaction. Employees were then asked to report with whom they regularly communicated inside and outside the workplace and to indicate how close they were to employees with whom they were linked. Employee turnover was measured after three months had elapsed. A goal of the research was to replicate a model of employee turnover that predicts employees more central in their social network to be less likely to leave, and to test a social support explanation of the centrality model. The results indicated that employees who reported a greater number of out-degree links with friends were less likely to leave. The number of in-degree links with friends did not significantly predict turnover, and neither did network links with peers. Friendship prestige, measured by the number of in-degree links, was strongly correlated with relational closeness and amount of time spent with employees outside the workplace.  相似文献   

Teachers engaging in action research: challenging some assumptions   总被引：2，自引：2，他引：0  

Judy Peters 《Educational Action Research》2013,21(4):535-556

A number of recent professional development projects in Australia have expected teachers to engage in action research as a process for professional learning and educational reform. This study investigated the experiences of ten teachers from one school who spent a year undertaking action research projects as part of the Innovative Links Project. The author was a participant observer in the study in her role as the school's ‘academic associate’ for the project. In this article, the project's expectations of the teachers are examined to reveal the extent to which they were based on realistic assumptions about the conditions within which the teachers worked as they tried to achieve them.  相似文献