Aportación a los conceptos de turismo marinero/pesquero y pesca-turismo.

In recent years, coastal places with a strong fishing tradition are trying to promote a new tourism modality, the so-called marine / fishing tourism. However, the concept has not yet been unanimously defined, since the different Fishing Laws present a variety of clarifications for this activity. This research shows the results of the analysis of existing legislation in this area, as well as the scientific literature, and provides a new definition of tourism / fishing and fishing-tourism, in order to clarify both terms.En los últimos años, los lugares costeros con una fuerte tradición pesquera intentan fomentar una nueva modalidad turística, el denominado turismo marinero/pesquero. Sin embargo, aún no se ha definido de forma unánime el concepto, ya que las distintas Leyes de Pesca presentan para esta actividad una diversidad de meanings. En esta investigación se muestran los resultados del análisis de la legislación existente en esta materia, así como de la literatura científica, y se aporta una nueva definición de turismo/pesquero y de pesca-turismo, con el fin de aclarar ambos términos

Hernández Borge, Julio (2013). Galicia, unha poboación avellentada

Hernández Borge, Julio (2013)Galicia, unha poboación avellentadaSantiago de Compostela: Universidad de Santiago de Compostela, 215 p. ISBN 978-84-15876-02-1Hernández Borge, Julio (2013)Galicia, unha poboación avellentada Santiago de Compostela: Universidad de Santiago de Compostela, 215 p. ISBN 978-84-15876-02-1Hernández Borge, Julio (2013)Galicia, unha poboación avellentadaSantiago de Compostela: Universidad de Santiago de Compostela, 215 p.ISBN 978-84-15876-02-1Hernández Borge, Julio (2013) Galicia, unha poboación avellentadaSantiago de Compostela: Universidad de Santiago de Compostela, 215 p.ISBN 978-84-15876-02-

Key-Value vs Graph-based data lakes for realizing Digital Twin systems

Digital twins constitute virtual representations of physically existing systems, synchronized at a specified frequency and fidelity. One way to connect physical and digital twins is through data lakes, which are efficient storage and query processing systems to manage the data exchanged between the twins. Existing digital twin systems make use of NoSQL or time databases for realizing their data lakes. Although very efficient, these proposals present some limitations for implementing non-trivial queries over highly connected data. In this paper we explore the use of graph databases for implementing data lakes, compare them with similar NoSQL proposals, and discuss the situations where one solution outperforms the other.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

An adaptable approach to learn realistic legged locomotion without examples

© 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Learning controllers that reproduce legged locomotion in nature has been a long-time goal in robotics and computer graphics. While yielding promising results, recent approaches are not yet flexible enough to be applicable to legged systems of different morphologies. This is partly because they often rely on precise motion capture references or elaborate learning environments that ensure the naturality of the emergent locomotion gaits but prevent generalization. This work proposes a generic approach for ensuring realism in locomotion by guiding the learning process with the spring-loaded inverted pendulum model as a reference. Leveraging on the exploration capacities of Reinforcement Learning (RL), we learn a control policy that fills in the information gap between the template model and full-body dynamics required to maintain stable and periodic locomotion. The proposed approach can be applied to robots of different sizes and morphologies and adapted to any RL technique and control architecture. We present experimental results showing that even in a model-free setup and with a simple reactive control architecture, the learned policies can generate realistic and energy-efficient locomotion gaits for a bipedal and a quadrupedal robot. And most importantly, this is achieved without using motion capture, strong constraints in the dynamics or kinematics of the robot, nor prescribing limb coordination. We provide supplemental videos for qualitative analysis of the naturality of the learned gaits.Peer ReviewedPostprint (author's final draft

Morphological symmetries in robot learning

This work studies the impact of morphological symmetries in learning applications in robotics. Morphological symmetries are a predominant feature in both biological and robotic systems, arising from the presence of planes/axis of symmetry in the system's morphology. This results in harmonious duplication and distribution of body parts (e.g., humans' sagittal/left-right symmetry). Morphological symmetries become a significant learning prior as they extend to symmetries in the system's dynamics, optimal control policies, and in all proprioceptive and exteroceptive measurements, related to the system's dynamics evolution \cite{ordonez2023discrete}. Exploiting these symmetries in learning applications offers several advantageous outcomes, such as the use of data augmentation to mitigate the cost and challenges of data collection, or the use of equivariant/invariant function approximation models (e.g., neural networks) to improve sample efficiency and generalization, while reducing the number of trainable parameters. Lastly, we provide a video presentation and an open access repository reproducing our experiments and allowing for rapid prototyping in robot learning applications exploiting morphological symmetries.This work is supported by the Spanish government with the project MoHuCo PID2020-120049RB-I00 and the ERA-Net Chistera project IPALM PCI2019-103386.Peer ReviewedPostprint (published version

La ciudad africana poscolonial: imaginario urbano y realidad en la ficción audiovisual

El medio natural y la evolución histórica, junto a diferentes culturas y religiones, han modelado unos conjuntos urbanos únicos y muy diversos en África. Aunque dicho continente continúa siendo el menos urbanizado del mundo, sus ciudades están sometidas a procesos de macrocefalia y se ven impulsadas por un acelerado ritmo de crecimiento. El análisis se centra en un extenso número de películas filmadas que posibilitan abordar un estudio que ofrezca reflexiones teóricas sobre las relaciones entre ficción audiovisual y las áreas urbanas en dicho continente con la finalidad de conocer que espacios se representan, cuáles son sus características y que imaginarios urbanos proyecta la ciudad africana. Desde un punto de vista metodológico se emplea un enfoque amplio, relacionado con la Geografía del Paisaje y la Geografía Cultural y se acota el estudio a las filmaciones de las últimas décadas. Entre los resultados se puede destacar la existencia de nuevas referencias visuales y nuevas claves interpretativas que permiten caracterizar los paisajes urbanos actuales de África

Nitrogen-fixing cyanobacteria are tuned for evolvability

Cyanobacteria produce a significant fraction of the oxygen on the environment and, together with archaea, they fix atmospheric nitrogen used by all other organisms. One of the first forms of multicellular organisms on Earth are filamentous cyanobacteria, which constitutCyanobacteria produce a significant fraction of the oxygen on the environment and, together with archaea, they fix atmospheric nitrogen used by all other organisms. One of the first forms of multicellular organisms on Earth are filamentous cyanobacteria, which constitute a paradigmatic model organism of the transition between unicellular and multicellular living forms. The genus Anabaena forms colonies with cells arranged in one-dimensional filaments; under nitrogen-limiting conditions some cells can differentiate into a nitrogen-fixing heterocysts, forming regular patterns to effectively provide nitrogen for the colony. e a paradigmatic model organism of the transition between unicellular and multicellular living forms. The genus Anabaena forms colonies with cells arranged in one-dimensional filaments; under nitrogen-limiting conditions some cells can differentiate into a nitrogen-fixing heterocysts, forming regular patterns to effectively provide nitrogen for the colony..