Totally umbilical disks and applications to surfaces in three-dimensional homogeneous spaces

Following [Ch] and [dCF], we give sufficient conditions for a disk type surface, with piecewise smooth boundary, to be totally umbilical for a given Coddazi pair. As a consequence, we obtain rigidity results for surfaces in space forms and in homogeneous product spaces that generalizes some known results.Ministerio de Educación y Ciencia MTM2007-65249Ministerio de Educación y Ciencia MTM2007-64504Junta de Andalucía P06-FQM-01642Junta de Andalucía FQM32

Reorganizing a 20th century cabinet of curiosities into a museum for the 21st century

This paper describes the life of a university museum that was born in the 1980s and transformed in the 21st century. Over a period of 25 years Professor Reverte collected more than 3700 objects and set up an authentic cabinet of curiosities dedicated to the fields of anthropology and forensic science. Despite the diversity of its contents, the museum had a recognized scientific interest. It has now undergone changes in order to meet the requirements of new academic demands and public accessibility, but without losing reference to its origins

Advancing Robot Autonomy for Long-Horizon Tasks

Autonomous robots have real-world applications in diverse fields, such as mobile manipulation and environmental exploration, and many such tasks benefit from a hands-off approach in terms of human user involvement over a long task horizon. However, the level of autonomy achievable by a deployment is limited in part by the problem definition or task specification required by the system. Task specifications often require technical, low-level information that is unintuitive to describe and may result in generic solutions, burdening the user technically both before and after task completion. In this thesis, we aim to advance task specification abstraction toward the goal of increasing robot autonomy in real-world scenarios. We do so by tackling problems that address several different angles of this goal. First, we develop a way for the automatic discovery of optimal transition points between subtasks in the context of constrained mobile manipulation, removing the need for the human to hand-specify these in the task specification. We further propose a way to automatically describe constraints on robot motion by using demonstrated data as opposed to manually-defined constraints. Then, within the context of environmental exploration, we propose a flexible task specification framework, requiring just a set of quantiles of interest from the user that allows the robot to directly suggest locations in the environment for the user to study. We next systematically study the effect of including a robot team in the task specification and show that multirobot teams have the ability to improve performance under certain specification conditions, including enabling inter-robot communication. Finally, we propose methods for a communication protocol that autonomously selects useful but limited information to share with the other robots.Comment: PhD dissertation. 160 page

¿Qué tipo de emociones experimenta el alumnado al ser evaluado con rúbrica?

El aprendizaje es un proceso que para darse en el aula requiere de la reflexión sobre las emociones que ocurren en la misma. Diversas investigaciones han alabado el uso de la rúbrica como herramienta para evaluar las distintas habilidades académicas; sin embargo, hay un vacío con respecto a la afectividad que genera su inmersión en el aula. Nos planteamos explorar las emociones que experimenta el alumnado al ser evaluado con una rúbrica. Un total de 65 alumnos de 2º ciclo de Enseñanza Básica (10 años y 11 años) de Évora (Portugal) cumplimentaron un amplio cuestionario. Los resultados muestran que más del 75% del alumnado muestra emociones positivas al ser evaluado con rúbrica, mientras que un 5% experimenta emociones de índole negativa. En consonancia con este dato, más de un 50% de alumnos experimentan orgullo, tranquilidad, confianza, satisfacción y curiosidad al ser evaluados con rúbrica; mientras que, más de un 20% de estudiantes muestran preocupación, ansiedad, nerviosismo y estrés. Estos resultados están mediatizados por la experiencia, dado que aquellos alumnos que han sido evaluados previamente con rúbrica muestran emociones diferentes a las de aquellos que no han sido evaluados a través de esta he-rramienta

Introducción a la Cerámica Prehistórica y Protohistórica en Galicia

Traballos de Arqueoloxía e Patrimonio (TAPA)[EN] The intention of these works is to show, in a didactic way, what are the properties of Bronze Age and Iron Age pottery in Galicia, done through the chracterization of their production processes.[ES] La intención de estos trabajos es exponer de manera didáctica cómo es la cerámica de la Edad del Bronce y de la Edad del Hierro en Galicia mediante la caracterización de los procesos de producción.Financiación de la edición: Laboratorio de Arqueoloxía e Formas Culturais.Peer reviewe

Strengthening move analysis methodology towards bridging the function-form gap

https://doi.org/10.1016/j.esp.2017.11.006Move analysis is a text analytical approach first developed by John Swales (1981) to investigate the underlying generic structure of research articles (RAs) in terms of moves-and-steps for pedagogical purposes. A widely shared aspiration of move analysts has been to identify the linguistic features characterizing the various RA moves not only in English, but also across languages. One shortcoming blocking this advancement is the lack of multilingual corpora fully annotated for their specific communicative functions in a coordinated and reliable manner. In this paper, we describe and discuss a methodology for analysing the various RA sections for their generic structure up from the step level in two languages and across a wide range of disciplines, using the discussion section as a test case for illustrating that methodology. Among the topics treated are establishing criteria for choosing a suitable sample of comparable RA discussions across the two languages, designing a model for annotating the section’s moves and steps, creating an accessible computer-assisted coding scheme, achieving good levels of inter-rater reliability, and obtaining validation from expert informants and writers. In essence, this is a methodology paper offered as a working model for other EAP researchers undertaking similar analyses in future

FGF2, but not EGF, Induces multiciliated ependymal cells to dedifferentiate and adopt radial glial features in vitro

Multiciliated ependymal cells form an epithelium lining most of the ventricular cavities of vertebrates brain. Although considered postmitotic and completely differentiated, ependymal cells maintain some phenotypic characteristics of neural stem cells. Thereby, under specific conditions they behave as neural stem cells, developing radial glia characteristics, and undergoing asymmetric division. Our group is searching for factors that promote dedifferentiation of ependymal cells in vitro. We developed a simple method to obtain pure cultures of non-adherent multiciliated ependymal cells from adult rats. These cultures were used to investigate the effect of FGF2 on the differentiation state and the aggregation of ependymal cells. Thus, FGF2 treated ependymal cells lose cilia and hence mobility, and after 7 days they aggregate to form irregular spheres (diameter ≥ 20-30 μm). Such changes were not observed when EFG was used instead of FGF2. To assess the specificity of FGF2 action on cell aggregation, the FGF receptor inhibitor PD166866 and an anti-FGF2 neutralizing antibody were used. In both conditions the aggregative effect of FGF2 was abolished. No cell proliferation was observed during sphere formation, at least in such experimental conditions. Spheres were analyzed by immunocytochemistry using radial glia markers. They were positive for GFAP, vimentin, BLBP and GLAST. These data suggest that FGF2 promotes the identity loss in multiciliated ependymal cells in vitro, which are transformed into cells with radial glia features.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

L’utilisation des TIC par les nouveaux instituteurs dans le curriculum d’anglais de l’Education Primaire

This paper presents a study whose main objective is to analyse the use of Information and Communication Technologies (ICT) by those teachers who finished their degrees as English primary teachers just one year before starting to work at schools. This study focuses on the official curriculum for the area of English language in primary education in the Region of Murcia, as well as on the practice developed by these teachers according to the requirements of the curriculum. In this line, we intend to find useful results for identifying correctly teaching needs in this area.Este trabajo presenta un estudio cuyo objetivo principal es analizar el uso que de las TIC están haciendo en el aula los maestros «noveles» de inglés, es decir, los que finalizaron sus estudios el año anterior al de su incorporación como docentes. Pero este estudio gira alrededor de un eje central, que es el propio Currículo Oficial del área de Inglés en Educación Primaria de la Región de Murcia y de la actuación de los maestros «noveles» de conformidad con éste. Pretendemos así encontrar resultados que nos sirvan de guía para detectar las principales necesidades formativas de los docentes.Ce travail présente une étude dont l’objectif principal est celui d’analyser l’usage des TIC que font en classe les instituteurs de la spécialité d’anglais (L.E), qui ont fini leurs études l’année précédente et qui travaillent actuellement. Mais cette étude est centrée sur un axe qui n’est autre que le curriculum officiel de l’aire d’anglais (L.E) dans l’Education Primaire de la Région de Murcie. De cette façon nous prétendons analyser, d’une part, le rôle que ce curriculum accorde aux TIC dans cette aire et, d’autre part, le rôle des nouveaux instituteurs en conformité avec le curriculum; nous prétendons ainsi arriver à des résultats qui nous serviraient de guide pour détecter les principales nécessités formatives dans ce champ

A Study on Multirobot Quantile Estimation in Natural Environments

Quantiles of a natural phenomena can provide scientists with an important understanding of different spreads of concentrations. When there are several available robots, it may be advantageous to pool resources in a collaborative way to improve performance. A multirobot team can be difficult to practically bring together and coordinate. To this end, we present a study across several axes of the impact of using multiple robots to estimate quantiles of a distribution of interest using an informative path planning formulation. We measure quantile estimation accuracy with increasing team size to understand what benefits result from a multirobot approach in a drone exploration task of analyzing the algae concentration in lakes. We additionally perform an analysis on several parameters, including the spread of robot initial positions, the planning budget, and inter-robot communication, and find that while using more robots generally results in lower estimation error, this benefit is achieved under certain conditions. We present our findings in the context of real field robotic applications and discuss the implications of the results and interesting directions for future work.Comment: 7 pages, 2 tables, 7 figure

Reducing Network Load via Message Utility Estimation for Decentralized Multirobot Teams

We are motivated by quantile estimation of algae concentration in lakes. We find that multirobot teams improve performance in this task over single robots, and communication-enabled teams further over communication-deprived teams; however, real robots are resource-constrained, and communication networks cannot support arbitrary message loads, making na\"ive, constant information-sharing but also complex modeling and decision-making infeasible. With this in mind, we propose online, locally computable metrics for determining the utility of transmitting a given message to the other team members and a decision-theoretic approach that chooses to transmit only the most useful messages, using a decentralized and independent framework for maintaining beliefs of other teammates. We validate our approach in simulation on a real-world aquatic dataset, and show that restricting communication via a utility estimation method based on the expected impact of a message on future teammate behavior results in a 44% decrease in network load while increasing quantile estimation error by only 2.16%.Comment: 4 pages, 1 table, 3 figure