A Prototype for a Multimodal Biometric Security system based on Face and Audio Signatures

Any automatically measurable, robust and distinctive physical characteristic or personal trait that can be used to identify an individual or verify the claimed identity of an individual, referred to as biometrics, has gained significant interest in the wake of heightened concerns about security and rapid advancements in networking, communication and mobility. Multimodal biometrics is expected to be ultra-secure and reliable, due to the presence of multiple and independent—verification clues. In this study, a multimodal biometric system utilising audio and facial signatures has been implemented and error analysis has been carried out. A total of one thousand face images and 250 sound tracks of 50 users are used for training the proposed system. To account for the attempts of the unregistered signatures data of 25 new users are tested. The short term spectral features were extracted from the sound data and Vector Quantization was done using K-means algorithm. Face images are identified based on Eigen face approach using Principal Component Analysis. The success rate of multimodal system using speech and face is higher when compared to individual unimodal recognition systems

Ethernet Telemetry for Towed Arrays

The towed array electronics is essentially a multichannel real time data acquisition system. The major challenges involved in it are the simultaneous acquisition of data from multiple channels, telemetry of the data over tow cable (several kilometres in some systems) and synchronization with the onboard receiver for accurate reconstruction. A serial protocol is best suited to transmit the data to onboard electronics since number of wires inside the tow cable is limited. The best transmission medium for data over large distances is the optical fibre. In this a two step approach towards the realization of a reliable telemetry scheme for the sensor data using standard protocols is described. The two schemes are discussed in this paper. The first scheme is for conversion of parallel, time-multiplexed multi-sensor data to Ethernet. Existing towed arrays can be upgraded to ethernet using this scheme. Here the last lap of the transmission is by Ethernet over Fibre. For the next generation of towed arrays it is required to digitize and convert the data to ethernet close to the sensor. This is the second scheme. At the heart of this design is the Analog-to-Ethernet node. In addition to a more reliable interface, this helps in easier fault detection and firmware updates in the field for the towed arrays. The design challenges and considerations for incorporating a network of embedded devices within the array are highlighted

Departament de Psicologia [Ressenya del llibre Adolescents and audio-visual media in five countries, de Ferran Casas, Irene Rizzini, Rose September, Per Egil Mjaavatn i Usha Nayar (coord.)]

Aquest llibre és el producte d'anys de cooperació entre equips de recerca de cinc països diferents, tot ells Key Institutions de la xarxa Childwatch International, en el marc d'un projecte plurinacional sobre adolescents i mitjans

Carrier Ethernet "label" scalability

A collection of slides from the authorpsilas seminar presentation is given

Improving Label Space Usage for Ethernet Label Switched Paths

Ethernet is becoming the dominant aggregation technology for carrier transport networks; however, as it is a LAN technology, native bridged ethernet does not fulfill all the carrier requirements. One of the schemes proposed by the research community to make ethernet fulfill carrier requirements is ethernet VLAN-label switching (ELS). ELS allows the creation of label switched data paths using a 12-bit label encoded in the VLAN TAG control information field. Previous label switching technologies such as MPLS use more bits for encoding the label. Hence, they do not suffer from label sparsity issues as ELS might. This paper studies the sparsity issues resulting from the reduced ELS VLAN-label space and proposes the use of the label merging technique to improve label space usage. Experimental results show that label merging considerably improves label space usage

Música i noves tecnologies : edició d'àudio amb AUDACITY. 'Música y nuevas tecnologías : edición de audio con AUDACITY'.

Resumen tomado de la publicación

iTunesU - open educational content in audio and video formats available via iTunes

There is a wealth of open educational content in audio and video formats available via iTunes U, one of the services offered especially for education via iTunes. There are details of how to get started as well as an informative video to help you. Details of how to get started with sharing content can be found for developers.

APL: un lenguaje de programación basado en audio para aprendices ciegos.

Resumen tomado de la publicación. Artículo seleccionado de RIBIE (Rede Iberoamericana de Informática Educativa) 2004, extendido y revisado para su publicación en IE Comunicaciones

Audio of What is the consumer? What is the reader? lecture

Audio of What is the consumer? What is the reader? lecture delivered by Dr Cui Su and Paul Caplan as part of #WSAmacd and #WSAadm remix course

INFO2009 The Evolution of Business Models (an audio podcast) Group 5: Team Moreau

An irreverent sideways look at new business models and their effect on the world around us. Designed with Years 9 and 10 in mind.

Geografia humana, recerca de suports audio-visuals : la ciutat. 'Geografía humana, búsqueda de soportes audio-visuales : la ciudad'.

Crear un material audio-visual. Mejorar la calidad de la enseñanza. Estudiar la aplicación de programas audio-visuales en el aula. Buscar una metodología adecuada a la utilización didáctica de los medios audio-visuales. Comprobar las diferencias que pueden existir entre diferentes medios audio-visuales, diapositivas-vídeo. La muestra está formada por los niños de tres aulas de segundo de BUP del Colegio Escoles Pies de Sarrià (Barcelona). En total 102 sujetos que han estudiado primero de BUP en el mismo centro. Se expone el marco teórico. Se describen las variables (medios audio-visuales, rendimiento escolar, rendimiento escolar anterior, metodología, inteligencia, clase social, profesor y edad). Se describe la muestra. División de la muestra en tres clases (sin medio audio-visual, con vídeo, con diapositivas). Realización del material audio-visual. Se realizan las sesiones pertinentes en cada clase. Aplicación de la prueba objetiva. Se analizan los datos. Se ofrecen conclusiones y alternativas. Prueba objetiva de rendimiento. Test d'aptituds diferencials. Baremo de puntuaciones anteriores. Diferencia de medias, estadística descriptiva, análisis de varianza, prueba de Scheffe, para establecer si hay diferencias entre el grupo que ha trabajado con medio audio-visual, visual y sin medio audiovisual. La metodología experimental aplicada no ha producido los resultados esperados, hay razones para afirmar que han intervenido factores no controlados, ajenos a la experimentación. Se constata un gran interés de los alumnos por el uso del vídeo como elemento de motivación. Se señala la importancia de incidir en este campo creando metodologías activas adecuadas y series de programas válidos. Hace falta una intensa investigación en las posibilidades y efectos de dichas metodologías.

Confección del documental audio-visual histórico-etnográfico : los religiosos castellano-leoneses en la evangelización de América.

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