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Search Results: 1 - 10 of 21167 matches for " cross-network dissemination "
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Cross-Network Information Dissemination in Vehicular Ad hoc Networks (VANETs): Experimental Results from a Smartphone-Based Testbed
Stefano Busanelli,Filippo Rebecchi,Marco Picone,Nicola Iotti,Gianluigi Ferrari
Future Internet , 2013, DOI: 10.3390/fi5030398
Abstract: In this work, we present an innovative approach for effective cross-network information dissemination, with applications to vehicular ad hoc networks (VANETs). The proposed approach, denoted as "Cross-Network Effective Traffic Alert Dissemination" (X-NETAD), leverages on the spontaneous formation of local WiFi (IEEE 802.11b) VANETs, with direct connections between neighboring vehicles, in order to disseminate, very quickly and inexpensively, traffic alerts received from the cellular network. The proposed communication architecture has been implemented on Android smartphones. The obtained experimental results show that an effective cross-network information dissemination service can entirely rely on smartphone-based communications. This paves the way to future Internet architectures, where vehicles will play a key role as information destinations and sources.
Automatic Localization of Optic Nerve Head in the Fundus Images Based on Cross-Network

Li Ju-peng,Chen Hou-jin,Zhang Xin-yuan,

电子与信息学报 , 2009,
Abstract: An automatic optic nerve head localization method in the fundus images based on cross-network is studied in this paper.To describe the space properties of the retinal vessel,a new conception-cross-network and measures of the network are proposed.Based on the model of fundus organs structure,automatic localization of optic nerve head is realized using the cross-network's measure parameter-cross density.Experimental results verify the effectiveness of the algorithm using the STARE,DRIVE fundus image databases...
Key Techniques for Mobile Peer-to-Peer Networks

OU Zhong-Hong,SONG Mei-N,ZHAN Xiao-Su,SONG Jun-De,

软件学报 , 2008,
Abstract: The great success of P2P (peer-to-peer) system based on Internet makes researchers focus on the mobile network environment, which is more distributed, with wider participants and more autonomic than the fixed P2P system. The popularity of intelligent terminals and the maturity of mobile application environment bring a bright prospect for mobile P2P networks. But the current research on the mobile P2P network is short of an accurate definition and a great number of questions are still needed to be studied deeply. In this paper, the basic concept of mobile P2P network is introduced firstly, including the definition and characteristics of mobile P2P network, the differences between mobile P2P network and mobile Ad Hoc network and the key techniques of the former. Then a comprehensive survey of the key techniques of mobile P2P networks, such as mobile P2P network architecture, resource discovery strategy, network structure consistency, data dissemination strategy, security and privacy mechanism, is given. The research results of the key techniques are also analyzed in depth, furthermore, the shortcomings and problems are outlined. In the end, the future research and development trend of mobile P2P networks is discussed.
Contextualized Analysis of Social Networks: Collaboration in Scientific Communities  [PDF]
Maria Teresinha Tamanini Andrade, Patrícia Braga, Tereza Kelly Gomes Carneiro, Núbia Moura Ribeiro, Marcelo A. Moret, Hernane Borges de Barros Pereira
Social Networking (SN) , 2014, DOI: 10.4236/sn.2014.32009

Currently, the collaboration in scientific communities has been studied in order to explain, among other things, the knowledge diffusion. The quality of Graduate Programmes is often associated with the scientific collaboration. This paper discusses how scientific collaboration processes can be identified and characterized through social and complex networks. For this purpose, collaboration networks of bibliographic production, research projects, and committees of PhD theses and Masters’ dissertations by researchers from a graduate program in computational modeling were studied. The data were obtained from CAPES’ reports of the period from 2001 to 2009. Among the studied indices, centrality indices indicate the presence of prominent researchers who influence others and promptly interact with other researchers in the network. The indices of complex networks reveal the presence of the small-world (i.e. these networks are favorable to increase coordination between researchers) phenomenon and indicate a behavior of scale-free degree distribution (i.e. some researchers promote clustering more than others) for one of the studied networks.

A Generic Platform for Sharing Functionalities among Devices  [PDF]
Remi Nguyen Van, Hideki Shimada, Kenya Sato
Communications and Network (CN) , 2014, DOI: 10.4236/cn.2014.62011

With so many potentially interconnected electronic devices in today’s homes, manufacturers have to think of theirs as only one of the components involved in a general user experience, and not as an isolated device. Users are likely to be using several devices at the same time, either actively through immediate interaction, or passively by expecting devices to give them notifications when necessary, for example. Thus, having cross-devices functionalities is often necessary for a product to be really adapted to its usage situation. Moreover, just as we install software on computers, smartphones and tablets for additional functionalities to use their own hardware, it would be logical to install cross-devices software to use the combined hardware of several home devices for a better user experience. However, even though a number of technologies can be used to transmit data or commands between devices, UPnP being a widespread example, it is not possible to access the behavior of remote devices and add functionalities to them this way. Thus, when manufacturers design their products, there is no way for them to make full use of the other appliances at the user’s home without developing and deploying specific software on each of them. In order to address this issue, this paper discusses a platform for generic development and on-the-fly deployment of applications on home devices. This system aims at letting device vendors deploy innovative features across devices in a home network, without requiring prior knowledge or control over devices already present in the user’s environment. For this platform to be fit for consumer devices, it is designed to be cost-effective, use recent and widespread technologies, and be fast to implement and work with.

A Study on the Formation Mechanism of Dissemination Force in Virtual Social Network from the Angle of Node Centrality

孙培翔, 彭捷
Emergence and Transfer of Wealth (ETW) , 2014, DOI: 10.12677/ETW.2014.44007
This study investigates the formation mechanism of dissemination force and the influence models of nodes’ network centrality in the virtual social network. Combining the Social Network Analysis and Tobit regression, we find that: 1) both a node’s degree centrality and betweenness centrality have a positive impact on its dissemination force; 2) the closeness centrality didn’t. For theory contribution, we have a clever understand of the source of member’ dissemination force and the various influence models of different node centralities in virtual social network. For practice contribution, different kinds of opinion leaders can be distinguished according to different centralities in a more accurate way, so that we can make a more effective use of their dissemination force in network marketing.
A incrível história da fraude dos embri?es clonados e o que ela nos diz sobre ciência, tecnologia e mídia
Souza, Iara Maria de Almeida;Caitité, Amanda Muniz Logeto;
História, Ciências, Saúde-Manguinhos , 2010, DOI: 10.1590/S0104-59702010000200012
Abstract: based on news reports from brazilian papers, the article examines the case of scientific fraud involving cloned embryos, committed by south korean scientist hwang. the media generally focus on the intellectual process of science, its discoveries, and the new possibilities it promises. in this case, however, science is shown the other way around, revealing a web that interweaves elements of a radically disparate nature, like the korean government, researchers, tools, research funds, human eggs and funguses, scientific journals, among others. these ties are what make up science in practice, yet they only become visible in the media when there is tension between them and, in this case, when something illicit happens.
NBgossip: An Energy-Efficient Gossip Algorithm for Wireless Sensor Networks
Feng Lu,Liang-Tien Chia,Kok-Leong Tay,Wai-Hoe Chong,
Feng Lu
,Liang-Tien Chia,Kok-Leong Tay,and Wai-Hoe Chong

计算机科学技术学报 , 2008,
Abstract: Gossip-based algorithms for information dissemination have recently received significant attention for sensor and ad hoc network applications because of their simplicity and robustness.However,a common drawback of many gossip- based protocols is the waste of energy in passing redundant information over the network.Thus gossip algorithms need to be re-engineered in order to become applicable to energy constrained networks.In this paper,we consider a scenario where each node in the network holds a piece of information(message)at the beginning,and the objective is to simultaneously disseminate all information(messages)among all nodes quickly and cheaply.To provide a practical solution to this problem for ad hoc and sensor networks,NBgossip algorithm is proposed,which is based on network coding and neighborhood gossip. In NBgossip,nodes do not simply forward messages they receive,instead,the linear combinations of the messages are sent out.In addition,every node exchanges messages with its neighboring nodes only.Mathematical proof and simulation studies show that the proposed NBgossip terminates in the optimal O(n)-order rounds and outperforms the existing gossip-based approaches in terms of energy consumption incurred in spreading all the information.
The Economics of Open Bibliographic Data Provision
Thomas Krichel,Christian Zimmermann
Economic Analysis and Policy , 2009,
Abstract: In this paper, we discuss the provision of bibliographic data as an extension of the open source concept. Our particular concern is the sustainability of such projects. We describe the RePEc (Research Papers in Economics) project, probably the largest ‘open source’ bibliographic database, and show that open source bibliographic data collection is sustainable.
B.Maheswari,Dr.S.Karthik,Prof. T.Rajendran
International Journal on Computer Science and Engineering , 2010,
Abstract: Wireless sensor networks, trend of the past few years involves in deploying a large number of small nodes. The nodes then sense environmental changes and report them to other nodes over flexible network architecture. A prototype was developed with a mesh topology of wireless sensor network for analysis of various message costs as well as the overall cost of data messages. Here a new task of task dissemination scheme is used, that can disseminate tasks into a subset of the sensor network. In which it uses a tree which is formedwhen the source node broadcasts the code version messages. The source node keeps the tasks and sends it based on the requests. This scheme also supports newly emerging wireless sensor network architectures with layered structure and mobile sensor nodes.
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