Informatics Publishing Limited

R. K. Gnanamurthy ¹, V. Krishnakumar ², D. Sathiya ³

Affiliations
1 Audisankara Institute of Engineering and Technology, Gudur, IN
2 Vivekanandha Engineering College for Women, Sankari, IN
3 Department of CSE, Vivekanandha Engineering College for Women, Sankari, IN

Abstract

Broadcasting is the process in which a source node sends a message to all other nodes in MANET. Network wide broadcasting in Mobile Ad Hoc Networks provides important control and route establishment functionality for a number of unicast and multicast protocols. This paper presents an overview of Flooding; Probability based broadcast forwarding, Location based and Neighbor Knowledge method broadcasting techniques in mobile ad hoc networks. The simulations are designed to pinpoint, in each category, specific failures to network conditions that are relevant to MANETs. For instance, protocols such as dynamic source routing (DSR), ad hoc on demand distance vector (AODV), use broadcasting to establish routes. Broadcasting MANET poses more challenges than in wired networks due to node mobility and scarce system resources. Because of the mobility there is no single optimal scheme for all scenarios.

Keywords

AODV-Adhoc on Demand Distance Vector Protocol, DSR-Dynamic Source Routing Protocol, MANET–Mobile Adhoc Network.

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G. Jagajothi ¹, M. Uma Maheswari ², D. Indhu ², D. Sathiya ², P. Sundari ²

Affiliations
1 Department of Information Technology, Periyar Maniammai University, Thanjavur, Tamil Nadu, IN
2 Periyar Maniammai University, Thanjavur, Tamil Nadu, IN

Abstract

Search queries on biomedical databases, such as PubMed, often return a large number of results, only a small subset of which is relevant to the user. Ranking and categorization, which can also be combined, have been proposed to alleviate this information overload problem. Results categorization for biomedical databases is the focus of this work. A natural way to organize biomedical citations is according to their MeSH annotations. MeSH is a comprehensive concept hierarchy used by PubMed. In this paper, we present the BioNav system, a novel search interface that enables the user to navigate large number of query results by organizing them using the MeSH concept hierarchy. First, the query results are organized into a navigation tree. At each node expansion step, BioNav reveals only a small subset of the concept nodes, selected such that the expected user navigation cost is minimized.

Keywords

Interactive Data Exploration and Discovery, Search Process, Graphical User Interfaces, Interaction Styles.

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