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Now showing items 31-40 of 103
State-of-charge estimation to improve decision making by MAC protocols used in WSNs
(IET, 02/07/2019)
Energy conservation is a topic of great interest in wireless sensor networks (WSNs). Various techniques have been proposed to minimise the energy consumption. One approach is to design medium access control (MAC) protocols ...
From implicit to touching interaction: RFID and NFC approaches
(05/25/2008)
Intelligent environments need interactions capable of detecting users and providing them with goodquality contextual information. In this sense we adapt technologies identifying and locating people adjusting their requirements. ...
Novel tunable optical filter employing a fiber loop mirror for synthesis applications in WDM
(11/12/2001)
A novel optical filter employing a fiber loop mirror within an amplified ring resonator is presented. The fiber loop mirror allows tuning by changing the coupling factor of a coupler. The device can be used as a building ...
Automatic generation of ETL processes from conceptual models
(11/06/2009)
Data warehouses (DW) integrate different data sources in order to give a multidimensional view of them to the decision-maker. To this aim, the ETL (Extraction, Transformation and Load) processes are responsible for extracting ...
Design and tolerance analysis of a router with an amplified resonator and Bragg gratings
(04/20/2000)
A novel ring resonator configuration with Bragg gratings is presented. The stability of this configuration is studied by a z-transform technique. A router design with a FWHM of 17 MHz, a -40-dB rejection ratio, and a 15-dB ...
Smoke detection for static cameras
(01/28/2015)
This paper describes the smoke detection for static cameras. The background subtraction was used to determine moving objects. Color characteristics were utilized to distinguish smoke regions and other scene members. Separate ...
Improvements of Energy-Efficient Techniques in WSNs: A MAC-Protocol Approach
(IEEE, 10/12/2018)
The pervasiveness of wireless sensor networks (WSNs) across different applications keeps increasing due to their versatility, although energy consumption is a huge constraint for these types of networks. Therefore, it is ...
Optical router for optical fiber sensor networks based on a liquid crystal cell
(09/04/2003)
Optical fiber sensor networks are evolving rapidly. They are used because of the inert nature of optical fibers allowing no electromagnetic interference and safe applications in inflammable atmospheres; other relevant ...
idMAS-SQL: Intrusion Detection Based on MAS to Detect and Block SQL injection through data mining
(05/10/2013)
This study presents a multiagent architecture aimed at detecting SQL injection attacks, which are one of the most prevalent threats for modern databases. The proposed architecture is based on a hierarchical and distributed ...
High-Resolution Indirect Feet–Ground Interaction Measurement for Hydraulic-Legged Robots
(10/01/2009)
Feet-ground interactions influence the legged robot's stability. In this paper, a high-resolution indirect force measurement for hydraulic-legged robots is presented. The use of pressure transducers placed at one or both ...