Doi Masatoshiun: "osservatore" giapponese al Vaticano II

La presencia de los «observadores delegados », provenientes de iglesias diversas de la romana, en el Concilio Vaticano ii fue importante por la variedad de sus aportaciones y la relevancia teológica y cultural de las mismas. Entre ellos, cabe recordar a Doi Masatoshi de la Nihon Kirisuto Kiyoudan, que participó en la segunda y tercera sesión de la asamblea conciliar. Sus aportaciones manifiestan libertad de juicio y capacidad de captar aspectos peculiares, litúrgicos y dogmáticos, sobre todo en el tema del diálogo. En este sector, siguiendo las enseñanzas de Tillich, pero profundizadas con originalidad propia, insistió en el mutuo conocimiento no solo entre las denominaciones cristianas sino también con los patrimonios de otras religiones. En los años sucesivos al Concilio, siguió profundizando en estas temáticas

Exploring the Fundamental Dynamics of Error-Based Motor Learning Using a Stationary Predictive-Saccade Task

The maintenance of movement accuracy uses prior performance errors to correct future motor plans; this motor-learning process ensures that movements remain quick and accurate. The control of predictive saccades, in which anticipatory movements are made to future targets before visual stimulus information becomes available, serves as an ideal paradigm to analyze how the motor system utilizes prior errors to drive movements to a desired goal. Predictive saccades constitute a stationary process (the mean and to a rough approximation the variability of the data do not vary over time, unlike a typical motor adaptation paradigm). This enables us to study inter-trial correlations, both on a trial-by-trial basis and across long blocks of trials. Saccade errors are found to be corrected on a trial-by-trial basis in a direction-specific manner (the next saccade made in the same direction will reflect a correction for errors made on the current saccade). Additionally, there is evidence for a second, modulating process that exhibits long memory. That is, performance information, as measured via inter-trial correlations, is strongly retained across a large number of saccades (about 100 trials). Together, this evidence indicates that the dynamics of motor learning exhibit complexities that must be carefully considered, as they cannot be fully described with current state-space (ARMA) modeling efforts

Learning the Optimal Control of Coordinated Eye and Head Movements

Various optimality principles have been proposed to explain the characteristics of coordinated eye and head movements during visual orienting behavior. At the same time, researchers have suggested several neural models to underly the generation of saccades, but these do not include online learning as a mechanism of optimization. Here, we suggest an open-loop neural controller with a local adaptation mechanism that minimizes a proposed cost function. Simulations show that the characteristics of coordinated eye and head movements generated by this model match the experimental data in many aspects, including the relationship between amplitude, duration and peak velocity in head-restrained and the relative contribution of eye and head to the total gaze shift in head-free conditions. Our model is a first step towards bringing together an optimality principle and an incremental local learning mechanism into a unified control scheme for coordinated eye and head movements

Il Cattolicesimo tra crisi e rinnovamento

Brescia, Morcellian

Il cattolicesimo tra crisi e rinnovamento

Brescia, Morcellian