Implementación del Monitoreo de opciones de Agricultura Sostenible Adaptada al Clima (ASAC): Seguimiento a su adopción e impactos en el TeSAC de Olopa, Guatemala – febrero 2020 Reporte de Actividad

Este documento presenta los resultados de la implementación del Marco de monitoreo multinivel sobre Agricultura Sostenible Adaptada al Clima (ASAC), en el TeSAC de Olopa en Guatemala. Este monitoreo ha permitido generar evidencia sobre la adopción de prácticas y tecnologías agrícolas viables y climáticamente inteligentes implementadas en el territorio. Además, otro objetivo del monitoreo fue evaluar el efecto que tiene la implementación de prácticas ASAC en la seguridad alimentaria, los medios de vida de los hogares y varias dimensiones de género. Para ello se recopiló información sobre las características socioeconómicas de 106 hogares y 187 agricultores (84 mujeres y 103 hombres), su percepción ante el efecto de eventos climáticos y la implementación de prácticas ASAC, entre otros aspectos

Physical Layer Security of Large Reflecting Surface Aided Communications with Phase Errors

The physical layer security (PLS) performance of a wireless communication link through a large reflecting surface (LRS) with phase errors is analyzed. Leveraging recent results that express the \ac{LRS}-based composite channel as an equivalent scalar fading channel, we show that the eavesdropper's link is Rayleigh distributed and independent of the legitimate link. The different scaling laws of the legitimate and eavesdroppers signal-to-noise ratios with the number of reflecting elements, and the reasonably good performance even in the case of coarse phase quantization, show the great potential of LRS-aided communications to enhance PLS in practical wireless set-ups.Comment: This work has been submitted to the IEEE for publication. Copyright may be transferred without notice, after which this version may no longer be accessibl

A New Educational Escape-Room-Based Model for the Sustainable Valorization and Management of Cultural and Natural Heritage

Based on the model of the “escape room” game, the activity proposed in this paper centres on the historical site of one of the fiercest battles of the Spanish Civil War (February 1937). The battle site is in the area of Rivas-vaciamadrid, the focal point of the Francoist and Republican camps, which connected the centre of Madrid with one of the city’s most important logistics and military facilities, Alcalà de Henares. The study proposes a new way to use the site and, in particular, proposes a live game aimed at involving different types of participants, aligning it with their specific profiles, whether children, adults or scholars. Its main aim is to propose an activity for the sustainable valorization of this heritage and to raise awareness in participants about this significant piece of history as well as its preservation in the long-term. It should be kept in mind that “Los pueblos que desconocen su Historia están condenados a repetirla”, i.e. “Those who do not know their history are doomed to repeat it”.The Rivas-vaciamadrid site is also a source of information and study regarding geological, natural and historical-artistic aspects. One example is the Porphyrio porphiyrio (western swamphen), present in the ecosystem of Rivas-vaciamadrid, which has a noteworthy past having been depicted in the mosaics of both the "Villa Romana del Casale" in Sicily and the Church of "San Vitale", in Ravenna, Italy as well as being reported in writings by Aristotle and Pliny the Elder

Multi-task multiple kernel machines for personalized pain recognition from functional near-infrared spectroscopy brain signals

Currently there is no validated objective measure of pain. Recent neuroimaging studies have explored the feasibility of using functional near-infrared spectroscopy (fNIRS) to measure alterations in brain function in evoked and ongoing pain. In this study, we applied multi-task machine learning methods to derive a practical algorithm for pain detection derived from fNIRS signals in healthy volunteers exposed to a painful stimulus. Especially, we employed multi-task multiple kernel learning to account for the inter-subject variability in pain response. Our results support the use of fNIRS and machine learning techniques in developing objective pain detection, and also highlight the importance of adopting personalized analysis in the process.Comment: International Conference on Pattern Recognition (ICPR

A pipeline framework for robot maze navigation using computer vision, path planning and communication protocols.

Maze navigation is a recurring challenge in robotics competitions, where the aim is to design a strategy for one or several entities to traverse the optimal path in a fast and efficient way. To do so, numerous alternatives exist, relying on different sensing systems. Recently, camera-based approaches are becoming increasingly popular to address this scenario due to their reliability and given the possibility of migrating the resulting technologies to other application areas, mostly related to human-robot interaction. The aim of this paper is to present a pipeline methodology towards enabling a robot solving maze autonomously, by means of computer vision and path planning. Afterwards, the robot is capable of communicating the learned experience to a second robot, which then will solve the same challenge considering its own mechanical characteristics which may differ from the first robot. The pipeline is divided into four steps: (1) camera calibration (2) maze mapping (3) path planning and (4) communication. Experimental validation shows the efficiency of each step towards building this pipeline

π‐Bridge Substitution in DASAs: The Subtle Equilibrium between Photochemical Improvements and Thermal Control

Donor-acceptor Stenhouse adducts (DASAs) are playing an outstanding role as innovative and versatile photoswitches. Until now, all the efforts have been spent on modifying the donor and acceptor moieties to modulate the absorption energy and improve the cyclization and reversion kinetics. However, there is a strong dependence on specific structural modifications and a lack of predictive behavior, mostly owing to the complex photoswitching mechanism. Here, by means of a combined experimental and theoretical study, the effect of chemical modification of the pi-bridge linking the donor and acceptor moieties is systematically explored, revealing the significant impact on the absorption, photocyclization, and relative stability of the open form. In particular, a position along the pi-bridge is found to be the most suited to redshift the absorption while preserving the cyclization. However, thermal back-reaction to the initial isomer is blocked. These effects are explained in terms of an increased acceptor capability offered by the pi-bridge substituent that can be modulated. This strategy opens the path toward derivatives with infra-red absorption and a potential anchoring point for further functionalization

Ayotzinapa: Viejas luchas, nuevas formas

En el presente documento se brinda una breve crónica de lo acontecido cuando en septiembre de 2014, con la participación de elementos de la fuerza pública, se desapareció a 43 estudiantes de la Normal Rural Isidro Burgos de Ayotzinapa, Guerrero. Se da cuenta tanto de las inconsistencias de la verdad histórica presentada por el gobierno federal, como de la crisis de legitimidad que vive la actual administración que, si bien llegó con el apoyo de un porcentaje muy bajo del electorado, con el paso de los años ha visto disolver su popularidad. Por otro lado, siguiendo las ideas de Raul Zibechi y Ana Esther Ceceña se menciona que lo sucedido en Ayotzinapa debe ser visto como un emblema del capitalismo neoextractivista que aqueja nuestra región. En dicho sentido se hace énfasis a la agenda política y económica de la actual administración, con el objetivo de dar cuenta de una agudización de las contradicciones sociales, sobre todo en territorios rurales de nuestro país