UTP-Ridda2: Recent submissions
Now showing items 1481-1500 of 3512
-
Wide tunable filters using a recirculating delay line with multi-reflections
(05/01/2002)A ring resonator with multiple reflections as a tunable filter is proposed and analyzed in this paper. A coupler and two identical Bragg gratings are used to implement the internal reflections so an active filter with a ... -
Demultiplexers for ultranarrow channel spacing based on Mach-Zehnders and ring resonators
(09/01/2004)Novel demultiplexer configurations based on concatenated Mach-Zehnders and a ring resonator are presented. These new devices exhibit high channel isolation, flexibility, no loss, and megahertz-adjustable full width at half ... -
A plastic fiber optic liquid level sensor
(06/09/2004)A system for measuring liquid level in multiple tanks using optical fiber technology has been developed. Oil field service industry or any sector requiring liquid level measurements in inflammable atmospheres can be benefited ... -
Synthesis of optical filters using microring resonators with ultra-large FSR
(12/06/2010)We propose a novel synthesis method for designing flexible, tunable non-periodic filters. It is based on a building block which is presented by first time for these purposes, being the poles position tuned by means of a ... -
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 ... -
Synthesis of Optical Filters Using Sagnac Interferometer in Ring Resonator
(11/12/2007)We propose a new synthesis method for the implementation of infinite impulse response filters, using a Sagnac interferometer within a ring resonator. This structure permits the synthesis of second-order optical functions ... -
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 ... -
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 ... -
Sagnac loop in ring resonators for tunable optical filters
(08/01/2005)General filter architecture using co-and counterpropagation signals are studied. A specific configuration based on a Sagnac loop within a ring resonator is analyzed. Novel tuning, apart from conventional tuning,is achieved ... -
Tunable optical filters using compound ring resonators for DWDM
(07/28/2003)The device is based on a loop mirror in a ring resonator. The loop mirror allows tuning by changing the coupling coefficient of a directional coupler. The loop mirror is implemented using a Sagnac configuration to have the ... -
Multi-sensor system using plastic optical fibers for intrinsically safe level measurements
(10/04/2004)A system for measuring liquid level in multiple tanks using optical fiber technology has been developed. Oil field service industry or any sector requiring liquid level measurements in flammable atmospheres can be benefited ... -
Arquitectura de un Sistema Multiagente para la Clasificación de Consultas con Inyección SQL
(2015-07-01)En este artículo se presenta una arquitectura multiagente para la clasificación de consultas con inyección SQL en aplicaciones Web. La arquitectura integra la clasificación de consultas SQL, la monitorización de las acciones ... -
An Adaptive Mechanism to Protect Databases against SQL Injection
(2015-07-01)The purpose of this article is to present an adaptive and intelligent mechanism that can handle SQL injection attacks. This proposal focuses on integrating a case-based reasoning (CBR) mechanism with a neural network. The ... -
A Solution CBR Agent-Based to Classify SOAP Message within SOA Environments
(06/10/2010)This paper presents the core component of a solution based on agent technology specifically adapted for the classification of SOA messages. These messages can carry out attacks that target the applications providing Web ... -
Improving the Language Active Learning with Multiagent Systems
(09/23/2009)Nowadays, there is a growing need for providing novel solutions to facilitate active learning in dependency environments. This paper present a multiagent architecture that incorporates agents specifically designed to provide ... -
Temporal bounded reasoning for context-based information fusion in DoS attack detection
(07/26/2010)Security is one of the main aspects to take into account when designing and developing web services. A meaning number of mechanisms of attack can lead to a web service system crash. As a result, the web service cannot allow ... -
Detecting DoS Attack in Web Services by Using an Adaptive Multiagent Solution
(07/01/2013)One of the most frequent techniques of a DoS attack is to exhaust available resources (memory, CPU cycles, and bandwidth) on the host server. A SOAP message can be affected by a DoS attack if the incoming message has been ... -
Application of pedagogical robotics in learning for children with special needs APRoLeCSNe
(08/21/2013)APRoLeCSNe is a project that presents the approach of pedagogical robotics to support the learning methods for children with special learning needs (CSLN). Pedagogical Robotics focuses on inductive learning and guided ... -
Automatización de bajo costo utilizada en la producción agrícola en invernaderos y huertos caseros
(07/29/2015)Actualmente existen en el mercado productos comerciales para la automatización de invernaderos y huertos. Sin embargo, dichas tecnologías son costosas y son utilizadas en estructuras para la producción agrícola a gran ... -
An Attack Detection Mechanism Based on a Distributed Hierarchical Multi-agent Architecture for Protecting Databases
(2009-07-01)This paper presents an innovative approach to detect and classify SQL injection attacks. The existing approaches are centralized while this proposal is based on a distributed hierarchical architecture to provide a robust ...