Content Discovery Research Papers - Academia.edu (original) (raw)

Recent disasters, such as the 2010 Haiti earthquake, have drawn attention to the potential role of citizens as active information producers. By using location-aware devices such as smartphones to collect geographic information in the form of geo-tagged text, photos, or videos, and sharing this information through online social media, such as Twitter, citizens create Volunteered Geographic Information (VGI). To effectively use this information for disaster management, we developed a VGI framework for the discovery of VGI. This framework consists of four components: (i) a VGI brokering module to provide a standard service interface to retrieve VGI from multiple resources based on spatial, temporal, and semantic parameters; (ii) a VGI quality control component, which employs semantic filtering and cross-referencing techniques to evaluate VGI; (iii) a VGI publisher module, which uses a service-based delivery mechanism to disseminate VGI, and (iv) a VGI discovery component to locate, browse, and query metadata about available VGI datasets. In a case study we employed a FOSS (Free and Open Source Software) strategy, open standards/specifications, and free/open data to show the utility of the framework. We demonstrate that the framework can facilitate data discovery for disaster management. The addition of quality metrics and a single aggregated source of relevant crisis VGI will allow users to make informed policy choices that could save lives, meet basic humanitarian needs earlier, and perhaps limit environmental and economic damage.

- by and +1
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- Disaster Management, Volunteered Geographic Information, Interoperability, Quality assessment

The emergence of affordable wireless and mobile devices was a key step towards deploying mobile peer-to-peer (P2P) systems. The latter allow users to share and search diverse multimedia resources over Mobile Ad-hoc Networks (MANETs). Due to the nature of MANETs, P2P mobile systems brought up many new thriving challenges, in particular with regard to the content discovery issue. Thus, the design of an efficient content discovery protocol has been of paramount importance. The thriving challenge is to (i) locate relevant peers sharing pertinent resources for users' queries and then (ii) to ensure that those peers would be reached by considering different MANET constraints (e.g., peer mobility, battery energy, peer load, to cite a few). Even though the literature witnesses a wealthy number of content discovery protocols, only few of them have considered the above-mentioned requirements. To overcome this shortage, we introduce in this paper an efficient Content Discovery Protocol (CDP) for P2P mobile systems. The idea underlying our proposal is to route users' queries to relevant peers that are (1) more suitable to answer the user query according to its content, (2) more stable to relay query hits, (3) less loaded to avoid the network congestion issue and (4) having more battery lifetime to avoid the network partitioning issue. The performed experiments show that CDP outperforms its competitor in terms of effectiveness and efficiency.

- by Salem Belhaj
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- Peer-to-Peer, Manet, Mobile Ad-hoc Networks (MANETs), Content Discovery

Research in Named Data Networking-based Mobile Ad hoc Network (NDN based MANET) experienced a lot of momentum and development in recent years. Such robust developments in the specific area surely contributes to advanced possibilities that Named Data Networking (NDN) can provide compared to traditional host centric networking solutions such as TCP/IP for dynamic routing that is much needed for MANET environment. Based on our observations, most existing work of NDN based MANET studies chose to use full wireless broadcast approach method for dynamic content routing as their solution in MANET environment. This review is carried out by analyzing how energy conservation of dynamic content routing was conducted in previous studies that has employed various methods of wireless broadcast smart control that are totally different from one another. We then discuss the disadvantages of the suggested solution from previous studies and scrutinizes it from the aspects of energy conservation of content routing in NDN based MANET point of view. Following that, we proceed to
suggest on how dynamic content routing should have been done in order to achieve beneficial energy efficiency improvements of content routing mechanism in NDN based MANET. Following that, we suggest how dynamic content routing mechanisms for energy conservation can be improved in NDN based MANET. At the same time, we show the differences between our suggested solution and existing solution as a proposal towards the creation of next generation of content routing solution for NDN based MANET implementation.