室内无线传感器网络定位研究     

宋秀慧  张宗璐 《江西教育学院学报》2013,(6):4-6

随着信息时代的到来,无线传感器网络技术应用形式更加广泛。各种地形检测和各种温度检测都有其应用,将对应的数据传递到使用客户端,从而对其进行分析。在本研究应用的过程中,一定要注意各个节点分析,因为无线网络技术的基础就是注重位置,才能展现其重要性和影响力。同时在每个传感器的设计中,将会直接安装GPS收发器,但是因为价格上的限制。发展过程受到了阻碍。所以,在对无线传感器进行分析过程中,主要是对其原有的特性进行分析,从而来拓展各个领域中的应用。  相似文献   

Production and consumption of university Linked Data     

Fouad Zablith  Miriam Fernandez  Matthew Rowe 《Interactive Learning Environments》2013,21(1):55-78

Linked Data increases the value of an organisation's data over the web by introducing explicit and machine processable links at the data level. We have adopted this new stream of data representation to produce and expose existing data within The Open University (OU) as Linked Data. We present in this paper our approach for producing the data, based on well-defined workflows at the organisation as well as the technical levels. We also discuss the data already available to consume, and show the potential improvements that Linked Data brings by presenting three applications: (1) the OU Expert Search system for finding experts at the OU based on a specified topic of interest, (2) the Social Study application to identify potential courses for students based on their Facebook profile information, and (3) the Linked OpenLearn application that helps students identify related media and courses to OpenLearn units at the OU. Before concluding the paper, we show the potential benefits and an approach towards interlinking data beyond The Open University with other universities, using a common categorisation scheme.  相似文献   

Attitudes and expectations: do attitudes towards education mediate the relationship between social networks and parental expectations?     

Tobias Roth  Zerrin Salikutluk 《British Journal of Sociology of Education》2012,33(5):701-722

Previous international research has shown that educational goals are fundamental for explaining differences in the educational attainment between individuals. For a better understanding of educational inequality, it is therefore crucial to know more about the mechanisms leading to different expectations. Our paper contributes to this field of research by empirically testing how social networks affect educational expectations of mothers for their children. Furthermore, we try to disentangle the underlying mechanisms by investigating which role resources and attitudes within social networks play in influencing educational expectations. We use quantitative data gathered in three federal states in Germany. The key results indicate that network composition not only has an effect on educational expectations but also on general attitudes towards education. Both attitudes towards education and embedded resources seem to mediate the effect of social ties on educational expectations.  相似文献   

WAP网络及其应用研究     

李建青 《湖州职业技术学院学报》2012,10(1):18-21

WAP是＂无线应用协议＂的英文简称,通过分析WAP网络及与其相关理论的应用现状,论述了WAP网络所处的不同阶段、WAP接入方式、WAP架构原理、WAP服务方案及WAP网站的几种浏览方式,最后给出了WAP的应用趋势。  相似文献   

无线多跳网络退化中临界过程转变时间的研究     

王亚娟 《咸阳师范学院学报》2012,27(2):14-16

无线多跳网络因为节点故障的存在,使得网络拓扑退化问题成为了网络生存过程中的关键问题,如何确定网络退化过程中的临界过程转变时间也成为研究网络化的关键。将网络的拓扑退化形式化为一个几何随机图,通过引入渗流理论,定量的描述了临界过程转变中的最后连接时间和首次分割时间,并说明这个网络测量指标的重要性。  相似文献   

A business model perspective for ICTs in public engagement     

Panagiotis Panagiotopoulos  Mutaz M. Al-Debei  Guy Fitzgerald  Tony Elliman 《Government Information Quarterly》2012

Public institutions, in their efforts to promote meaningful citizen engagement, are increasingly looking at the democratic potential of Information and Communication Technologies (ICTs). Previous studies suggest that such initiatives seem to be impeded by socio-technical integration barriers such as low sustainability, poor citizen acceptance, coordination difficulties, lack of understanding and failure to assess their impact. Motivated by these shortcomings, the paper develops and applies a business model perspective as an interceding framework for analysis and evaluation. The underlying principle behind this approach is that it is not technology per se which determines success, but rather the way in which the business model of the technological artifact is configured and employed to achieve the strategic goals. The business model perspective is empirically demonstrated with the case of an online petitioning system implemented by a UK local authority. The case illustrates the importance of considering ICTs in public engagement from a holistic view to make them more manageable and assessable.  相似文献   

国内外企业内部社会网络与知识共享相关研究述评     

刘佳 《图书与情报》2012,(1):83-87

文章对国内外关于企业内部社会网络与知识共享的相关研究文献进行了综述和评价,归纳分析了目前将社会网络与知识共享相结合的研究主要有哪些角度、观点和结论,并对目前国内在此领域研究中存在的问题进行了分析。  相似文献   

Learning networks for schools: keeping up with the times or a leap into the unknown?     

Mark O'Brien  Diana Burton  Anne Campbell  Anne Qualter  Tünde Varga-Atkins 《Curriculum Journal》2013,24(4):397-411

This article seeks to explore the ‘fit’ of ‘the network’ as an organizational form being implemented in schools in England. It considers current trends within education policy, pedagogy and educational technology in the context of these new service delivery models and relates these to the current interest in learning networks. The article draws upon the experience of school networks as it has been discussed in evaluation research and literature surveys, to highlight the issues around their implementation. The purpose, typology and potential tensions of educational networks are reviewed, with a particular focus on the Networked Learning Communities (NLCs) pioneered by the National College for School Leadership (NCSL). Although, on the face of things, the position of the ‘school network’ as a structural model seems logical, there are significant tensions which suggest that the implementation and development of meaningful and high quality networks is far more challenging than the government may appreciate.  相似文献   

A systematic review of social support in youth sport     

《International review of sport and exercise psychology》2013,6(1):198-228

The purpose of this study was to provide a systematic review of studies concerning social support in youth sport from 1990 to 2013. A total of 73 studies were evaluated and are reported in four sections: sample characteristics; research designs; social support provider type; and key correlates relating to social support. Samples ranged from 1 to 564. Studies examined a wide range of sports, ages (10–22 years) and competition levels. Studies used qualitative (23%), quantitative (75%) and mixed-model (2%) designs. The main conclusion is that recent advances in the conceptualization of social support have generated a more diverse set of methods to examine the quantity and satisfaction of social support in a sports context. Coaches were identified as the most prevalent provider of social support through offering participants unique forms of tangible, informational, emotional and esteem support. Furthermore, coach, parent and peer support plays a significant role in shaping youth sport experiences both from a positive (athlete motivation levels, elite sport participation) and negative (drop-out) perspective. The discussion focuses on the current status of the research area, limitations, suggested practical implications (e.g., providing proactive support) and future research directions (e.g., examining optimal support matching).  相似文献   

A meta-study of qualitative research examining stressor appraisals and coping among adolescents in sport     

Katherine A. Tamminen  Nicholas L. Holt 《Journal of sports sciences》2013,31(14):1563-1580

Abstract

The main aim of this study was to create an integrated theoretical perspective of the qualitative adolescent sport stressor appraisal and coping literature. A secondary aim was to critique theoretical and methodological issues in the extant literature. Following database searches, 20 studies were retained for analysis. Meta-data, meta-theory, and meta-method analyses were conducted followed by a final meta-synthesis of findings. Analyses produced four themes: contextual and dynamic stressor appraisals, contextual and dynamic coping, coping resources and processes of acquisition, and social networks as assets and liabilities. Findings highlight the need for precise use of theory in the study of coping. Finally, while several data collection methods have been used, there is scope for greater methodological diversity to advance our understanding of coping among adolescent athletes.  相似文献