Experiences with free and open courses using on-line multimedia resources

This paper analyzes the learning experiences and opinions obtained from a group of undergraduate students in their interaction with several on-line multimedia resources included in a free on-line course about Computer Networks. These new educational resources employed are based on the Web2.0 approach such as blogs, videos and virtual labs which have been added in a web-site for distance self-learning.

On-line microwave-based preconcentration device for inductively coupled plasma atomic emission spectrometry: Application to the elemental analysis of spirit samples

A microwave-based thermal nebulizer (MWTN) has been employed for the first time as on-line preconcentration device in inductively coupled plasma atomic emission spectrometry (ICP-AES). By the appropriate selection of the experimental conditions, the MWTN could be either operated as a conventional thermal nebulizer or as on-line analyte preconcentration and nebulization device. Thus, when operating at microwave power values above 100 W and highly concentrated alcohol solutions, the amount of energy per solvent mass liquid unit (EMR) is high enough to completely evaporate the solvent inside the system and, as a consequence, the analyte is deposited (and then preconcentrated) on the inner walls of the MWTN capillary. When reducing the EMR to the appropriate value (e.g., by reducing the microwave power at a constant sample uptake rate) the retained analyte is swept along by the liquid-gas stream and an analyte-enriched aerosol is generated and next introduced into the plasma cell. Emission signals obtained with the MWTN operating in preconcentration-nebulization mode improved when increasing preconcentration time and sample uptake rate as well as when decreasing the nozzle inner diameter. When running with pure ethanol solution at its optimum experimental conditions, the MWTN in preconcentration-nebulization mode afforded limits of detection up to one order of magnitude lowers than those obtained operating the MWTN exclusively as a nebulizer. To validate the method, the multi-element analysis (i.e. Al, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Pb and Zn) of different commercial spirit samples in ICP-AES has been performed. Analyte recoveries for all the elements studied ranged between 93% and 107% and the dynamic linear range covered up to 4 orders of magnitude (i.e. from 0.1 to 1000 ��g L���1). In these analysis, both MWTN operating modes afforded similar results. Nevertheless, the preconcentration-nebulization mode permits to determine a higher number of analytes due to its higher detection capabilities.

Evaluaci��n continua utilizando controles on-line. Percepci��n de los estudiantes

En la asignatura Sistemas Inteligentes del grado en Ingenier��a Inform��tica, durante el curso 2013-14, se plante�� a los estudiantes un sistema de evaluaci��n continua de la parte te��rica consistente en la realizaci��n de controles on-line utilizando cuestionarios Moodle. En las normas de evaluaci��n de la asignatura, los controles acumulaban toda la materia impartida hasta la fecha y su peso creciente de cara a la obtenci��n de la nota final. Ten��amos especial inter��s en determinar si el sistema resultaba estimulante para los estudiantes. El art��culo aborda la evaluaci��n continua, el contexto de la asignatura y los criterios de evaluaci��n que se establecieron para la evaluaci��n de la parte te��rica de la asignatura. Adem��s, se presentan las caracter��sticas de los cuestionarios Moodle, se aporta la encuesta de valoraci��n del m��todo que se pas�� a los estudiantes, los resultados obtenidos en la citada encuesta, las conclusiones y las recomendaciones para el futuro. Deseamos destacar el soporte de la ���Red de Investigaci��n en Sistemas Inteligentes. Evaluaci��n continua mediante controles utilizando Moodle��� C��digo de Red ICE: 3021.

Nuevas perspectivas de la contrataci��n on line de servicios tur��sticos y paquetes din��micos de turismo

La implementaci��n de las nuevas tecnolog��as o TIC���s en el sector tur��stico se ha visto favorecida, en los ��ltimos a��os, por las posibilidades que Internet ofrece de poder comprobar instant��neamente la existencia real del proveedor del servicio, la veracidad del servicio prestado o las condiciones en que se presta.. El aumento de la contrataci��n electr��nica de servicios tur��sticos exige que los proveedores de estos servicios y los turistas tengan en cuenta las diferentes normas jur��dicas que resultan de aplicaci��n en el ��mbito de los servicios de la sociedad de la informaci��n, principalmente, la Ley 34/2002, de 11 de julio, de Servicios de la Sociedad de la Informaci��n y de Comercio Electr��nico (LSSI), las normas reguladoras del consumo, en concreto, el Real Decreto legislativo 1/2007, de 16 de noviembre, por el que se aprueba el texto refundido de la Ley General para la Defensa de los Consumidores y Usuarios y otras leyes complementarias (TRLGDCU) y su modificaci��n por la Ley 3/2014, de 27 de marzo, as�� como las diferentes normas auton��micas reguladoras del turismo que existen en la actualidad. En definitiva, un estudio detallado de las implicaciones que la contrataci��n electr��nica de servicios tur��sticos supone realizar una descripci��n legal del r��gimen jur��dico que resulta de aplicaci��n a los diferentes oferentes e intermediarios que intervienen esta nueva modalidad contractual y a los denominados paquetes din��micos de turismo.

Red de seguimiento del Grado en Criminolog��a on line

La red ten��a por objeto llevar a cabo un especial seguimiento del grupo on line del Grado en Criminolog��a que se imparte en la titulaci��n y para el que son necesarios esfuerzos de coordinaci��n adicionales y m��todos docentes espec��ficos a la docencia no presencial. As��, la red ha constituido un espacio de reflexi��n sobre docencia no presencial, que ha dado como resultado la adopci��n e implementaci��n de acciones de mejora.

A Hardware-Software Approach for On-Line Soft Error Mitigation in Interrupt-Driven Applications

Integrity assurance of configuration data has a significant impact on microcontroller-based systems reliability. This is especially true when running applications driven by events which behavior is tightly coupled to this kind of data. This work proposes a new hybrid technique that combines hardware and software resources for detecting and recovering soft-errors in system configuration data. Our approach is based on the utilization of a common built-in microcontroller resource (timer) that works jointly with a software-based technique, which is responsible to periodically refresh the configuration data. The experiments demonstrate that non-destructive single event effects can be effectively mitigated with reduced overheads. Results show an important increase in fault coverage for SEUs and SETs, about one order of magnitude.

Issues in On-Line Legal Translation Teaching

A description is given of the structure of, theoretical background of, and experiences gained from, a course in legal English-Spanish translation taught at the University of Alicante.

Total oxidation of naphthalene using palladium nanoparticles supported on BETA, ZSM-5, SAPO-5 and alumina powders

A range of catalysts based on Pd nanoparticles supported on inorganic supports such as BETA and ZSM-5 zeolites, a silicoaluminophosphate molecular sieve (SAPO-5) and ��-alumina as a standard support have been tested for the total oxidation of naphthalene (100 ppm, total flow 50 ml/min) showing a conversion to carbon dioxide of 100% between 165 and 180 ��C for all the analysed catalysts. From the combined use of zeolites with PVP polymer protected Pd based nanoparticles, enhanced properties have been found for the total abatement of naphthalene in contrast with other kinds of catalysts. A Pd/BETA catalyst has been demonstrated to have excellent activity, with a high degree of stability, as shown by time on line experiments maintaining 100% conversion to CO2 during the 48 h tested.