Browsing by Author "Wijesinghe, L"

Now showing 1 - 4 of 4

item: Conference-Abstract
Disaster and emergency warning network (DEWN) : harnessing cellular technologies for early warning dissemination
Wijesinghe, L; Siriwardena, P; Wijerathna, S; Purasinghe, H; Dias, D
The Disaster and Emergency Warning Network (DEWN) is a last-mile disaster early warning system based on a suite of mobile technologies. It alerts citizens of impending disasters through SMS/Cell Broadcast activated remote-alarm devices, cell broadcasting to handsets and multi-lingual SMS.
item: Conference-Abstract
Sensing line-of-sight obstructions in a multipath radio environment
(2011) Chandrasekara, R; Wijesinghe, L; Siriwardena, P; Sampath, JPK; Edirisinghe, R; Dias, D
The paper presents the development and the experimental verification of a technique for the identification of obstructions in the line-of-sight path between two or more radio transceivers in a multipath radio environment. The objective of this technique is to use RSS measurements from a mesh of simple sensor nodes to identify intrusions.
item: Article-Abstract
Wi-alert : a wireless sensor network based intrusion alert prototype for HEC
(2015-09-01) Edirisinghe, R; Dias, SAD; Chandrasekara, R; Wijesinghe, L; Siriwardena, P; Sampath, PK
A wired fence based intrusion detection and alerting mechanism for boundaries separating wildlife habitats and human settlements was implemented, particularly as a solution to the Human-Elephant Conflict (HEC). The objective of the research reported in this paper is to propose and verify an alternative technique for this wired fence based alerting mechanism to overcome its limitations and to improve its effectiveness. This article presents a comprehensive study of alternative solutions with deliberate consideration of the practical constraints. Wi-Alert is a wireless sensor network based intrusion detection system proposed as the best alternative solution. This article reports the outcomes of the first two phases of ongoing developments of Wi-Alert. The first phase of experiments was conducted to investigate the multi-path effect reduction techniques at one site. In the next phase, experiments were conducted to verify the ability to detect elephants. The results obtained via the candidate techniques are compared. Both experiments confirm the feasibility of the prototype as a non-invasive method to detect elephants.
item: Article-Abstract
A Wireless sensor network for early warning of elephant intrusions
(2015-09-01) Wijesinghe, L; Siriwardene, p; Dias, D
A wireless sensor network (WSN) specifically designed for detecting elephant intrusions into villages that border wildlife reserves and alerting threatened communities of the location of the same is described. Novel strategies for hardware, firmware and communication have been applied, exploiting the rareness of events to be detected and the low data rates and light traffic load involved, in order to balance power consumption, cost, easy installation and testing in rural areas. Attempts have been made to build in automatic preventive maintenance measures and maintainable by personnel without technical know-how. The paper presents the design of the system and the experimental evaluation of a prototype implementation.