El discurso expositivo en el aula como acto de comunicaci??n y como texto para ser comprendido

Resumen tomado de la publicaci??n

Grau en Comunicació Cultural: una nova via per interpretar el present

La Facultat de Lletres de la UdG ha posat en marxa aquest curs 2009-2010 el nou grau en Comunicació Cultural. La proposta innovadora ha tingut com a recompensa el fet que s’han cobert les quaranta places que s’oferien

Planificació estratègica d’una xarxa de vies verdes a la comarca de la Selva

Les vies verdes són vies de comunicació autònomes reservades als desplaçaments no motoritzats. Per a la proposta de creació d’una xarxa per a la comarca de La Selva s’han utilitzat dues eines: els sistemes d’informació geogràfica i els seus indicadors complementaris, les quals han permès generar diversos possibles traçats, per triar una proposta final amb la seva valoració

El clima motivacional y el estilo de comunicaci??n del entrenador como predictores del compromiso en futbolistas j??venes

Resumen tomado de la publicaci??n. Resumen tambi??n en ingl??s

La Producció de documentals en grups cooperatius: aprenent creant en l'era de les tecnologies de la informació i la comunicació

Aquest treball es centra en descriure i explicar l’organització, orientació, desenvolupament, seguiment i avaluació d’un taller de l’assignatura Pensament i Llenguatge organitzat com a un taller audiovisual cooperatiu. En aquest taller, organitzat com a un espai de creació audiovisual, els alumes han construït el seu propi coneixement a partir de l’elaboració en petits grups de treball cooperatiu d’un documental sobre l’adquisició típica i patològica del llenguatge. L’experiència comença amb l’especificació dels objectius instruccionals, la formació dels grups, l’assignació i l’establiment de rols, l’explicació de la tasca acadèmica, i l’explicació dels criteris d’èxit. El alumnes s’organitzen en grups d’aprenentatge cooperatiu, escullen una etapa evolutiva en el període comprés d’un any des dels 0 als 6 anys i a partir d’aquí, és el mateix grup qui es distribueix les diferents tasques i responsabilitats individuals i qui porta a terme el treball necessari per a preparar un documental sobre l’adquisició del llenguatge en el període triat. El professor, en el desenvolupament de la realització de documental anirà plantejant paulatinament cadascun dels passos a seguir en la seva elaboració. Per a guiar i orientar el treball dels grups, el professor realitza dues estratègies bàsiques: les tutories de petits grups d'aprenentatge cooperatiu en les quals orienta i realitza el seguiment del treball i de la dinàmica de treball grupal i els plenaris amb tot el grup d’alumnes on es plantegen les orientacions generals i les diferents fases del treball. Finalment, s’organitza un Festival de Cinema Documental amb tot l’alumnat del taller en el qual cada grup fa la presentació del seu documental per a tal de difondre els resultats de la seva investigació a la resta del grup-classe. En aquest festival, els alumnes s’avaluen d’uns als altres mitjançant un sistema de co-avaluació emmascarat en els premis de la crítica. L’organització del taller sobre la base del treball cooperatiu i amb la finalitat de la realització d’un documental audiovisual afavoreix tant la formació d’actituds de col·laboració i d’ajuda com l’aprofundiment teòric i l’adquisició de múltiples destreses de selecció, redacció i difusió de la informació. L’aplicació d’aquesta metodologia, per tant, aporta molts beneficis respecte a un dels gran reptes de la educació en aquest món globalitzat de la informació: formar a persones integradores socialment i amb destreses en la gestió de la informació

Pautas culturales, c??digos de comunicaci??n y rendimientos

Resumen tomado de la publicaci??n

An hybrid methodology for RL-based behavior coordination in a target following mission with an AUV

Proposes a behavior-based scheme for high-level control of autonomous underwater vehicles (AUVs). Two main characteristics can be highlighted in the control scheme. Behavior coordination is done through a hybrid methodology, which takes in advantages of the robustness and modularity in competitive approaches, as well as optimized trajectories

Vision-based localization of an underwater robot in a structured environment

This paper presents a vision-based localization approach for an underwater robot in a structured environment. The system is based on a coded pattern placed on the bottom of a water tank and an onboard down looking camera. Main features are, absolute and map-based localization, landmark detection and tracking, and real-time computation (12.5 Hz). The proposed system provides three-dimensional position and orientation of the vehicle along with its velocity. Accuracy of the drift-free estimates is very high, allowing them to be used as feedback measures of a velocity-based low-level controller. The paper details the localization algorithm, by showing some graphical results, and the accuracy of the system

Dam wall detection and tracking using a Mechanically Scanned Imaging Sonar

In dam inspection tasks, an underwater robot has to grab images while surveying the wall meanwhile maintaining a certain distance and relative orientation. This paper proposes the use of an MSIS (mechanically scanned imaging sonar) for relative positioning of a robot with respect to the wall. An imaging sonar gathers polar image scans from which depth images (range & bearing) are generated. Depth scans are first processed to extract a line corresponding to the wall (with the Hough transform), which is then tracked by means of an EKF (Extended Kalman Filter) using a static motion model and an implicit measurement equation associating the sensed points to the candidate line. The line estimate is referenced to the robot fixed frame and represented in polar coordinates (rho&thetas) which directly corresponds to the actual distance and relative orientation of the robot with respect to the wall. The proposed system has been tested in simulation as well as in water tank conditions

Pose-based SLAM with probabilistic scan matching algorithm using a mechanical scanned imaging sonar

This paper proposes a pose-based algorithm to solve the full SLAM problem for an autonomous underwater vehicle (AUV), navigating in an unknown and possibly unstructured environment. The technique incorporate probabilistic scan matching with range scans gathered from a mechanical scanning imaging sonar (MSIS) and the robot dead-reckoning displacements estimated from a Doppler velocity log (DVL) and a motion reference unit (MRU). The proposed method utilizes two extended Kalman filters (EKF). The first, estimates the local path travelled by the robot while grabbing the scan as well as its uncertainty and provides position estimates for correcting the distortions that the vehicle motion produces in the acoustic images. The second is an augment state EKF that estimates and keeps the registered scans poses. The raw data from the sensors are processed and fused in-line. No priory structural information or initial pose are considered. The algorithm has been tested on an AUV guided along a 600 m path within a marina environment, showing the viability of the proposed approach

Automatic self-configuration of the logical network using distributed software agents

We present a system for dynamic network resource configuration in environments with bandwidth reservation. The proposed system is completely distributed and automates the mechanisms for adapting the logical network to the offered load. The system is able to manage dynamically a logical network such as a virtual path network in ATM or a label switched path network in MPLS or GMPLS. The system design and implementation is based on a multi-agent system (MAS) which make the decisions of when and how to change a logical path. Despite the lack of a centralised global network view, results show that MAS manages the network resources effectively, reducing the connection blocking probability and, therefore, achieving better utilisation of network resources. We also include details of its architecture and implementation

Experimental Modeling and Control Strategies on an Open Mobile Robot Platform PRIM

This research work deals with the problem of modeling and design of low level speed controller for the mobile robot PRIM. The main objective is to develop an effective educational tool. On one hand, the interests in using the open mobile platform PRIM consist in integrating several highly related subjects to the automatic control theory in an educational context, by embracing the subjects of communications, signal processing, sensor fusion and hardware design, amongst others. On the other hand, the idea is to implement useful navigation strategies such that the robot can be served as a mobile multimedia information point. It is in this context, when navigation strategies are oriented to goal achievement, that a local model predictive control is attained. Hence, such studies are presented as a very interesting control strategy in order to develop the future capabilities of the system

PRIM an Open Mobile Robot Platform. Motivation, Present and Future Trends

This paper is focused on the robot mobile platform PRIM (platform robot information multimedia). This robot has been made in order to cover two main needs of our group, on one hand the need for a full open mobile robotic platform that is very useful in fulfilling the teaching and research activity of our school community, and on the other hand with the idea of introducing an ethical product which would be useful as mobile multimedia information point as a service tool. This paper introduces exactly how the system is made up and explains just what the philosophy is behind this work. The navigation strategies and sensor fusion, where machine vision system is the most important one, are oriented towards goal achievement and are the key to the behaviour of the robot

WMR navigation using local potential field corridors and narrow local occupancy grid perception

Path planning and control strategies applied to autonomous mobile robots should fulfil safety rules as well as achieve final goals. Trajectory planning applications should be fast and flexible to allow real time implementations as well as environment interactions. The methodology presented uses the on robot information as the meaningful data necessary to plan a narrow passage by using a corridor based on attraction potential fields that approaches the mobile robot to the final desired configuration. It employs local and dense occupancy grid perception to avoid collisions. The key goals of this research project are computational simplicity as well as the possibility of integrating this method with other methods reported by the research community. Another important aspect of this work consist in testing the proposed method by using a mobile robot with a perception system composed of a monocular camera and odometers placed on the two wheels of the differential driven motion system. Hence, visual data are used as a local horizon of perception in which trajectories without collisions are computed by satisfying final goal approaches and safety criteria

Local WMR navigation with monocular data

This article presents recent WMR (wheeled mobile robot) navigation experiences using local perception knowledge provided by monocular and odometer systems. A local narrow perception horizon is used to plan safety trajectories towards the objective. Therefore, monocular data are proposed as a way to obtain real time local information by building two dimensional occupancy grids through a time integration of the frames. The path planning is accomplished by using attraction potential fields, while the trajectory tracking is performed by using model predictive control techniques. The results are faced to indoor situations by using the lab available platform consisting in a differential driven mobile robot