The number of configurations in the full shift with a given least period

For any group $G$ and any set $A$, consider the shift action of $G$ on the full shift $A^G$. A configuration $x \in A^G$ has \emph{least period} $H \leq G$ if the stabiliser of $x$ is precisely $H$. Among other things, the number of such configurations is interesting as it provides an upper bound for the size of the corresponding $\text{Aut}(A^G)$-orbit. In this paper we show that if $G$ is finitely generated and $H$ is of finite index, then the number of configurations in $A^G$ with least period $H$ may be computed using the M\"obius function of the lattice of subgroups of finite index in $G$. Moreover, when $H$ is a normal subgroup, we classify all situations such that the number of $G$-orbits with least period $H$ is at most $10$.Comment: 8 page

Nonlinear analysis of time series generated by schizophrenic patients

Producción CientíficaFocusing on a particular feature, the ability to create random rhythms, our study is aimed at the analysis of cognitive performance in patients with schizophrenia, comparing them with normal subjects. We have developed a new cognitive test using methods from nonlinear dynamical systems theory, with the objective of measuring the subject's capacity of developing a random rhythm

Integration of a voice recognition system in a social robot

Human-Robot Interaction (HRI) 1 is one of the main fields in the study and research of robotics. Within this field, dialog systems and interaction by voice play a very important role. When speaking about human- robot natural dialog we assume that the robot has the capability to accurately recognize the utterance what the human wants to transmit verbally and even its semantic meaning, but this is not always achieved. In this paper we describe the steps and requirements that we went through in order to endow the personal social robot Maggie, developed in the University Carlos III of Madrid, with the capability of understanding the natural language spoken by any human. We have analyzed the different possibilities offered by current software/hardware alternatives by testing them in real environments. We have obtained accurate data related to the speech recognition capabilities in different environments, using the most modern audio acquisition systems and analyzing not so typical parameters as user age, sex, intonation, volume and language. Finally we propose a new model to classify recognition results as accepted and rejected, based in a second ASR opinion. This new approach takes into account the pre-calculated success rate in noise intervals for each recognition framework decreasing false positives and false negatives rate.The funds have provided by the Spanish Government through the project called `Peer to Peer Robot-Human Interaction'' (R2H), of MEC (Ministry of Science and Education), and the project “A new approach to social robotics'' (AROS), of MICINN (Ministry of Science and Innovation). The research leading to these results has received funding from the RoboCity2030-II-CM project (S2009/DPI-1559), funded by Programas de Actividades I+D en la Comunidad de Madrid and cofunded by Structural Funds of the EU

Foreword of the special issue on motivation in Physical Education, sport and physical activity and health

Editorial para Journal of human kinetics, titulado Foreword of the special issue on motivation in Physical Education, sport and physical activity and health.Editorial for Journal of Human Kinetics, entitled Foreword of the special issue on motivation in Physical Education, sport and physical activity and health.peerReviewe

Formación y supervisión de mentores: las claves del éxito en los programas de mentoría entre iguales en la universidad

La lucha contra el abandono universitario y una mejor y más rápida integración de los estudiantes de nuevo ingreso a la universidad son dos de los objetivos que se intentan conseguir a través de la implantación de programas de mentoring. En la realización de los programas, el seguimiento de las reuniones de mentoring se realiza a través de la supervisión de los mentores. En contextos universitarios esta supervisión suele ser reslizada por profesores, que previamente, han tenido que recibir un taller para llevar a cabo las reuniones de forma adecuada. El objetivo de este trabajo consiste en analizar los niveles de satisfacción de los mentores con los distintos aspectos cada reunión de mentoría así como las principales dificultades que verbalizan los mentores en las reuniones de supervisión

La modalidad deportiva como factor determinante de la motivación, el compromiso y la deportividad en adolescentes

A través del presente trabajo se pretendía valorar las diferencias presentadas en el tipo de motivación, el compromiso deportivo y los comportamientos de deportividad, analizándolo en función de la modalidad deportiva. Para ello seleccionamos un total de 1409 deportistas pertenecientes a las modalidades de fútbol, baloncesto, balonmano y voleibol, con edades comprendidas entre los 11 y los 16 años, los cuales rellenaros diversos cuestionarios encaminados a valorar las variables del estudio. Tras el análisis de los resultados, se han encontrado diferencias significativas en numerosas variables, destacando las diferencias encontradas en los factores pertenecientes a la Teoría de la Autodeterminación. Así pues, como principal conclusión se puede destacar que la modalidad deportiva puede ser un factor determinante del tipo de motivación, del compromiso y de los comportamientos deportivos que muestran los jóvenes deportistas

Gender differences in motivation and perception of utility of the scholar sport

El principal objetivo del estudio es analizar las diferencias entre el nivel de autodeterminación y la satisfacción de las necesidades psicológicas básicas en función del género y su incidencia sobre la percepción de utilidad del deporte. Participaron en el estudio 1897 jóvenes jugadores de baloncesto, balonmano, fútbol y voleibol (1378 chicos y 519 chicas). Diferentes instrumentos fueron utilizados para medir las distintas variables abordadas en el estudio. Los resultados mostraron que los chicos presentan puntuaciones más altas en todos los tipos de motivación y que su sentimiento de competencia es más elevado que el de las chicas. Por otro lado, la motivación autodeterminada y la satisfacción de las necesidades conducen a percibir mayor utilidad del deporte en ambos géneros.The aim of the study was to analyze the differences between self-determination level and satisfaction of the three psychological needs with respect to gender and their influence on the perception of utility of the sport. The sample comprised 1897 basketball, handball, football and volleyball young players (1378 boys and 519 girls). Different measures were used to examine the differences between the variables contained in the study. Results showed that boys were more intrinsically and extrinsically motivated and showed less a motivation than girls, as well as their scored higher in competence than girls. However, both for boys and girls, self-determined motivation and psychological needs satisfaction led to a greater perception of utility of the sport.peerReviewe

Influence of the motivational climate created by coach in the sport commitment in youth basketball players

This study aims to measure the relationships between motivational climates created by coaches with respect to sport commitment in young participants. The sample was formed by 285 male and female basketball players, ranging in age from 11 to 16 years old that completed questionnaires which assessed motivational climate and sport commitment. Results showed that athletes' commitment is positively associated with players 'perception of a mastery climate created by coaches and negatively related with the perception of a performance climate

Análisis del grado de diversión e intención de persistencia en jóvenes deportistas desde la perspectiva de la teoría de la autodeterminación

Through the Self-Determination Theory, this study aims to examine the relationship between self-determination levels and satisfaction with basic psychological needs with respect to enjoyment and the intention to persist shown in team sports. The sample comprised 1007 football, basketball, handball and volleyball players, both male and female, who ranged in age from 11 to 16 years old. The results showed that basic psychological needs had a greater relationship and prediction capacity of enjoyment and the intention to persist than the level of self-determination. Concretely, the perception of social relationships and competence were the strongest predictors of those two variables. To conclude, we highlight the need to promote satisfaction with basic psychological needs, mainly social relationships and competence, which would lead to stronger feelings of enjoyment and a firmer intention to continue playing sport