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Optical biosensors are probably the most popular in bioanalysis due to their selectivity and sensitivity. Among them, fluorescence lifetime detection is expected to enhance the reliability of biomolecular interaction assays as it is an intrinsic determination of the fluorescence. Fluorescence lifetime can be used for pathogen detection or in DNA assays, which is of utmost importance primarily for health and safety reasons in the food industry, water and environment quality control and clinical diagnosis. Lifetime measurements can be done by time-correlated single-photon counting (TCSPC), implemented by repeatedly stimulating a fluorophore and recording the time until the first emitted photon is detected by a sensor. It is usually performed with expensive and bulky picosecond lasers to excite the sample, photomultiplier tubes or avalanche photodiodes to detect the emitted light, and photon counting modules. Our device is operated in TCSPC with a conventional and low cost laser diode, which is driven by off-the-shelf electronics with sub-nanosecond fall times, a CMOS chip featuring a linear array of ultra-sensitive avalanche photodiodes (APD) working in Geiger mode, a microfluidic channel on top of the CMOS chip (Polydimethylsiloxane), and a low cost FPGA processing the data coming from the detector. An optical filter is not needed because we control accurately the switch-off time of the laser pulse just a few picoseconds before the detector is habilitated for sensing. At the same time, the proximity of the sample and the APD sensors makes unnecessary the use of lenses. We have developed a lifetime fluorescence detection system, which is simple, miniaturized and cost effective. This new technology is being developed to build a PoC (Point of Care) device for molecular diagnosis. The system was tested with several concentrations of fluorescent quantum dots (QDOT 605 from Life Technologies), having a lifetime of 35ns. Measurement times were only 15 seconds.

The present communication reflects the work realized by the Educational Innovation Network in Student Evaluation of the University of Girona (UdG). This working group consists of a heterogeneous group of lecturers from different university colleges. During the group activity the following stages have been developed: specific training in evaluation, analysis of the evaluation modalities made in the UdG, detailed analysis of the evaluation of each lecturer and coordinated modifications to innovate and to improve the student’s evaluation. The principal opposing difficulties are commented: dispersion of the existing information, the difficulty to coordinate the work with the rest of professors who teach the same subject and the great time dedication required to carry out the changes. Finally, there are gathered the conclusions for the work of the innovation network, where is outlined the importance of a previous training, the richness of points of view owing to the heterogeneity of the members and the usefulness of having software tools to channel the communication among the different members and to store the documentation La presente comunicación refleja el trabajo realizado por la Red de Innovación Docente sobre Evaluación del Alumnado de la Universidad de Girona. Este grupo de trabajo está integrado por un grupo heterogéneo de profesores de diferentes centros docentes de la Universidad de Girona. Durante este primer año de funcionamiento, la actividad del grupo se ha centrado en el intercambio de información entre los integrantes del grupo sobre la evaluación, el análisis de modalidades de evaluación de cada profesor y la propuesta de modificaciones conjuntas para innovar y mejorar la evaluación de los estudiantes en las diferentes asignaturas impartidas en el próximo curso. Se comentan las principales dificultades encontradas: destacando la dispersión de la información existente, en algunos casos la dificultad de coordinar el trabajo con el resto de profesores que imparten docencia en la misma asignatura, la gran dedicación de tiempo inicial a la hora de realizar los cambios y el número elevado de alumnos en algunas asignaturas troncales u obligatorias impiden introducir métodos más dinámicos de evaluación. Finalmente se recogen las conclusiones del trabajo de la red de innovación, donde se destaca la importancia de una formación previa, la riqueza de puntos de vista debida a la heterogeneidad de los integrantes y la utilidad de disponer de herramientas informáticas que canalice la comunicación entre los diferentes miembros y almacene la documentación

Llibre preparat per ser utilitzat com a material de text de Física bàsica, assignatura de lliure elecció de 6 crèdits, del segon quadrimestre dels nous plans d'estudis d' Informàtica Tècnica (especialitats de Sistemes i de Gestió) i d' Enginyeria Tècnica Agrícola (especialitats d' Explotacions Agropecuàries i d' Indústries Agràries i Agroalimentàries) de la Universitat de Girona. L’objectiu estratègic és donar als alumnes, en un sol quadrimestre, la formació necessària per a seguir un curs de primer de física, així com que l’alumne tingui agilitat en la transformació d’unitats, s’habituï a comprovar la raonabilitat dels resultats i sigui capaç de superar la noció que la física és un conjunt de formules inconnexes

The alloys, Fe60Ni14Zr6B20 and Fe85Nb9B6, were produced by mechanical alloying. The formation of the nanocrystallites (about 40 nm) was detected by X-ray diffraction. Furthermore, a slight oxygen presence (

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