Búsqueda de ancentros comunes entre genomas de diferentes especies

La cerca de similituds entre regions de diferents genomes ofereix molta informació sobre les relaciones entre les especies d’aquest genomes. Es molt útil per a l’estudi de la conservació de gens d’una especia a un altre, de com les propietats d’un gen son assignades a un altre gen o de com es creen variacions en genomes diferents durant l’evolució d’aquestes especies. La finalitat d’aquest projecte es la creació d’una eina per a la cerca d’ancestres comuns de diferents especies basada en la comparació de la conservació entre regions dels genomes d’aquestes especies. Per a una comparació entre genomes mes eficaç una part important del projecte es destinarà a la creació d’una nova unitat de comparació. Aquestes noves unitats seran superestructures basades en agrupació dels MUMs existent per la mateixa comparació que anomenarem superMUMs. La aplicació final estarà disponible al servidor: http://revolutionresearch.uab.es

The Multiscenario Multienvironment BioSecure Multimodal Database (BMDB)

A new multimodal biometric database designed and acquired within the framework of the European BioSecure Network of Excellence is presented. It is comprised of more than 600 individuals acquired simultaneously in three scenarios: 1) over the Internet, 2) in an office environment with desktop PC, and 3) in indoor/outdoor environments with mobile portable hardware. The three scenarios include a common part of audio/video data. Also, signature and fingerprint data have been acquired both with desktop PC and mobile portable hardware. Additionally, hand and iris data were acquired in the second scenario using desktop PC. Acquisition has been conducted by 11 European institutions. Additional features of the BioSecure Multimodal Database (BMDB) are: two acquisitionsessions, several sensors in certain modalities, balanced gender and age distributions, multimodal realistic scenarios with simple and quick tasks per modality, cross-European diversity, availability of demographic data, and compatibility with other multimodal databases. The novel acquisition conditions of the BMDB allow us to perform new challenging research and evaluation of eithermonomodal or multimodal biometric systems, as in the recent BioSecure Multimodal Evaluation campaign. A description of this campaign including baseline results of individual modalities from the new database is also given. The database is expected to beavailable for research purposes through the BioSecure Association during 2008.

Los caminos a Walden

La línea que une la publicación de Walden de Henry David Thoreau con la primeraproyección, ciento quince años después, de Diaries Notes and Sketches also known asWalden de Jonas Mekas marca una nueva forma de entender la subjetividad como armapolítica y vehículo para la transmisión de ideas partiendo de la vida cotidiana; desde la perspectiva que surge de esta línea se estudiará también el cine de Robert Kramer y de Jacques Rozier.

Control and femtosecond time-resolved imaging of torsion in a chiral molecule

We study how the combination of long and short laser pulses can be used to induce torsion in an axially chiral biphenyl derivative (3,5-difluoro-3 ,5 -dibromo-4 -cyanobiphenyl). A long, with respect to the molecular rotational periods, elliptically polarized laser pulse produces 3D alignment of the molecules, and a linearly polarized short pulse initiates torsion about the stereogenic axis. The torsional motion is monitored in real-time by measuring the dihedral angle using femtosecond time-resolved Coulomb explosion imaging. Within the first 4 picoseconds (ps), torsion occurs with a period of 1.25 ps and an amplitude of 3◦ in excellent agreement with theoretical calculations. At larger times, the quantum states of the molecules describing the torsional motion dephase and an almost isotropic distribution of the dihedral angle is measured.We demonstrate an original application of covariance analysis of two-dimensional ion images to reveal strong correlations between specific ejected ionic fragments from Coulomb explosion. This technique strengthens our interpretation of the experimental data