Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"data dissemination"”.
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Multimedia data dissemination in opportunistic systems
… communication and supports indirect end-to-end data delivery. But due to individuals’ mobility, OppNets are characterized by frequent communication disruptions and uncertain data delivery. Hence, these networks are mostly used for exchanging small messages like disaster alarms or traffic …
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Low-complexity approaches to distributed data dissemination
… theory and practice for the three canonical data dissemination problems we will discuss. Here we also discuss how these three problems are all in different senses 'dual' to each other, and use this as a motivating force to attack them with unifying themes.
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Securing Data Dissemination in Vehicular ad hoc Networks
… in military applications where controlling the dissemination of messages is essential. This thesis therefore provides a review of the issue of security in VANET and MANET; it also surveys existing solutions for dissemination control. It highlights a particular area not adequately addressed until …
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Performance of random network coding for data dissemination
… for multicast. While much focus has been on the data rates achievable with coding, we focus on the time needed to broadcast a finite amount of data throughout networks using distributed randomized linear coding. We consider networks with increasingly complex graphs. We use analysis of the …
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Privacy Preserving Efficient Data Dissemination in Decentralized Online Social Networks
… (OSN) is the privacy and control of user data due to the client-server architecture of the popular ecosystems. In this dissertation, we discuss how to develop a decentralized OSN platform so that the user has direct control of his/her information. When designing a new OSN, it is critical …
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Distributed learning automata based data dissemination in swarm robotic systems
… the swarms work in render any previous contact data between robots useless as the contact patterns are different for each deployment. In the case of military and disaster scenarios, delivering data items quickly is imperative to the success of a mission. However, robots have limited battery and …
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Conformance preserving data dissemination for large-scale peer to peer systems
… applications where dealing with vast stream data becomes a norm rather than an exception, it is in urgent need to design data dissemination systems in large scale. We identify a new pattern of data dissemination based on conformance constraints where data accuracy can be traded for low …
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A Data-Quality Driven Framework for Data Dissemination in Wireless Sensor Networks
In this thesis we propose a comprehensive data-centric information processing and dissemination framework for sensor networks. We consider two main research issues in this thesis: (T1) light-weight coordination mechanisms among sensors to collect valuable information from the environment and ( T2) …
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Beyond music sharing: an evaluation of peer-to-peer data dissemination techniques in large scientific collaborations
The avalanche of data from scientific instruments and the ensuing interest from geographically distributed users to analyze and interpret it accentuates the need for efficient data dissemination. An optimal data distribution scheme will find the delicate balance between conflicting requirements of …
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Design and performance evaluation of data dissemination and hovering information protocols for vehicular ad hoc networks (VANETs)
… of that, our attention has been gathered by the Data Dissemination and the Information Hovering protocols for VANETs. For most of the VANETs' applications the data dissemination is a crucial process. Also, for many of them the availability of information over some time in a bounded region, or a …
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Reliable satellite broadcast transmission: protoccol design, simulation and analysis
… The RSBT design was largely based on the data dissemination requirements of Australia's Bureau of Meteorology, and on Optus Communications' Omnicast Digital satellite service. Protocols commonly used for point-to-point satellites transmission were analysed—mainly to identify protocol …
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Location-Aware Protocols for Energy-Efficient Information Processing in Wireless Sensor Networks
… processing in these networks. </p><p>The data provided by a sensor node is often useful only in the context of the location of the data source. Thus, sensor networks rely on localization schemes to provide location information to sensor nodes. The premise of this thesis is that …
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A Framework for Incident Detection and notification in Vehicular Ad-Hoc Networks
… for incident detection and notification dissemination in VANETs. This framework consists of three main components: a system architecture, a traffic incident detection engine and a notification dissemination mechanism. The basic idea of our framework is to collect and aggregate …
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Group formation and communication in mobile wi-fi networks
… observed in university campuses. We then present data dissemination strategies for these grouping scenarios. We concentrate on update based applications such as file repositories, version controlling systems and calendar. Hence, we present protocols for short message dissemination such as control …
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Does open data increase government accountability?
… project concerns itself with the impact of open data on government accountability. It critically assesses open data’s ability to increase the accountability of government in practice. The study offers insight into the positive dividends and potentially negative consequences of open data. It …
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Data Collection, Dissemination, and Security in Vehicular Ad Hoc Network
… Moreover, they also provide real-time data for traffic and travel management.</p><p>A VANET is composed of fast-moving mobile nodes (vehicles) that have intermittent and short contacts, fixed road-side units (RSUs) that overhear and broadcast to vehicles, and a central server. Vehicles …
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Relating information-theoretic limits to the lyapunov exponent of a dynamical system
… theory. In particular, we explore two related data dissemination problems - channel coding with feedback and source coding with feedforward - and see that the Lyapunov exponent of a related dynamical system emerges as a fundamental quantity. For channel coding with feedback, we show that for a …
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Using Timed-Release Cryptography to Mitigate Preservation Risk of Embargo Periods
… Due to temporary access restrictions, embargoed data cannot be distributed freely and thus preserved via data refreshing during the embargo time interval. A solution to mitigate the risk of data loss has been developed by suggesting a data dissemination framework that allows data refreshing of …
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Data Aggregation and Dissemination in Vehicular Ad-Hoc Networks
… category, depend on having certain vehicular data(vehicular speed, <em>X</em> position and <em>Y</em> position) available. Although these applications appear to use the same vehicular data, the characteristics of this data (<em>i.e.</em>, amount, accuracy, and update rate) will vary based on …
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