Cyclic homogeneous Riemannian manifolds

In spin geometry, traceless cyclic homogeneous Riemannian manifolds equipped with a homogeneous spin structure can be viewed as the simplest manifolds after Riemannian symmetric spin spaces. In this paper, we give some characterizations and properties of cyclic and traceless cyclic homogeneous Riemannian manifolds and we obtain the classification of simply-connected cyclic homogeneous Riemannian manifolds of dimension less than or equal to four. We also present a wide list of examples of non-compact irreducible Riemannian $3$-symmetric spaces admitting cyclic metrics and give the expression of these metrics

Homogeneous spin Riemannian manifolds with the simplest Dirac operator

We show the existence of nonsymmetric homogeneous spin Riemannian manifolds whose Dirac operator is like that on a Riemannian symmetric spin space. Such manifolds are exactly the homogeneous spin Riemannian manifolds $(M,g)$ which are traceless cyclic with respect to some quotient expression $M=G/K$ and reductive decomposition $\mathfrak{g} = \mathfrak{k} \oplus \mathfrak{m}$. Using transversally symmetric fibrations of noncompact type, we give a list of them

Gone with the Euro: A Reappraisal of the Peseta’s Adjustment Mechanism (1870-1998)

The peseta was the Spanish currency for more than a century and, during this time, it played a remarkable role in adjusting the balance of payments. This paper presents a chronology of the moments when the adjustment was crucial, which, consistent with the macro-trilemma, coincided with periods of external openness. Moreover, this paper provides empirical support to the thesis that links the exceptionality of a floating peseta during the gold standard with fiscal profligacy.La peseta, durante el tiempo en que fue la moneda española, desempeñó un destacado papel en el ajuste de los desequilibrios externos. Este artículo establece una cronología de aquellos momentos en los que el ajuste fue más intenso y que, de acuerdo con el trilema, coinciden con momentos de apertura. Además, este artículo refuerza empíricamente la tesis que vincula la excepcionalidad de la flotación de la peseta durante el patrón oro con el problema de control fiscal.The authors have received financial support from the Diputación General de Aragón (SEIM research group, SEC 269191/2 project); J. M. S. and M. S. from the Ministerio de Economía y Competitividad (HAR2015-67017) and M. D. G. from the Ministerio de Ciencia y Tecnología (ECO2014-58991-C3-1; C3-2)

Breve resumen de la vida de la Madre Sor Isabel Maria de Santa Ana ... de Religiosas Descalzas ... de Santa Clara ... [Texto impreso]

Sign.: []1, *4, A-Ee

Herramienta para la creación y edición de rutas en un Sistema de Gestión de Flotas para entornos industriales

[ES] Un Sistema de Gestión de Flotas es un conjunto de herramientas software que permiten el control y coordinación de una flota de robots móviles para el desempeño de una serie de tareas automáticas, tales como el transporte autónomo de carros de mercancía. Este sistema es necesario para que se lleve a cabo una utilización óptima de la flota y de sus recursos compartidos (ascensores, cruces, puertas, pasillos de un solo carril, posiciones de carga y descarga, cargadores de baterías, etc.), pero también para que no se produzcan interbloqueos o inanición. Una de las partes más importantes de este sistema es la herramienta de creación y edición de rutas y recursos compartidos, que facilite la puesta en marcha y mantenimiento del gestor en cualquier tipo de instalación. Actualmente la configuración de la ruta se define en forma de grafo, en el que se establecen los puntos de interés así como la interconexión entre ellos, dotando, tanto a los nodos como a sus arcos con información necesaria para la correcta gestión de la flota[CA] Un Sistema de Gestió de Flotes es un conjunt de ferramentes software que permeten el control i coordinació de una flota de robots mòbils per a l’acompliment d’una serie de tasques de transport automàtic, tals com el transport autònom de carros de mercaderia. Aquest sistema es necessari per a que es porte a terme una utilització òptima de la flota i dels seus recursos compartits (ascensors, encreuaments, portes, carregadors de bateríes, etc.), però també per a que no es produeixquen interbloquejos o inanició. Una de les parts més importants d’aquest sistema es la ferramenta de creació i edició de rutes i recursos compartits, que facilite la posada en marxa i manteniment del sistema en qualsevol tipus d’instal·lació. Actualment la configuració de la ruta es defineix en forma de graf, on s’estableixen els punts d’interés així com la interconexió entre ells, dotant, tant als punts com als seus arcs d’informació necessaria per a la correcta gestió de la flota[EN] A Fleet Management System is a set of software tools that allows the control and coordination of a fleet of mobile robots to perform a group of tasks automatically, such as the autonomous transport of carts full of materials. This system is required to make an optimum utilization of the fleet and its resources (elevators, doors, load and unload positions, battery chargers, etc.), but also to avoid deadlocks or starvation. One of the most important part of this system is the tool for creating and modifying routes and shared resources, which helps with the start-up and maintenance of the system in any kind of installation. Currently, the route configuration is defined as a graph, where the points of interest as well as the interconnection between them are stablished, providing to the points and their arcs necessary information for the correct management of the fleet.Gómez Gadea, J. (2019). Herramienta para la creación y edición de rutas en un Sistema de Gestión de Flotas para entornos industriales. http://hdl.handle.net/10251/125336TFG

Análisis de riesgos laborales en la granja de pequeños rumiantes de la Universitat Politècnica de València

[EN] In those professional activities in which people have contact with animals, employees have a hygienic risk associated with zoonoses, a group of animal diseases which can be transmitted to humans by direct contact with the animal or through any bodily fluid as urine or saliva, or even by the presence of mosquitoes or any other insects. In addition, there could be some microorganisms in the workplace which are also dangerous for the worker. The tasks performed on the farm object of our study, don’t involve manipulation or willful use of the biological agent. Despite this, it could reach the worker by direct contact with infected humans or animals, by processing their products or by contact with items or means where it can live or survive (materials, water, soil, air, food, waste ...), all of them being used as exhibition sources. The environmental quality has also been evaluated, as also dangers that could eventually lead to an accident due to farm activities development. The main objective of this study is to determine and analyze the overall risks existing in the small ruminants’ farm at the Polytechnic University of Valencia (UPV), referring to the industrial hygiene as to ergonomics, and also the work safety, being necessary a depth knowledge of the farm, its workers and the tasks performed in it. We have developed a work plan to get this target in which we could study these tasks they’re performing in order to evaluate in an accurate and real way the risks they’re exposed to. Sampling and measurements have been taken in order to analyze the risks concerning not only hygienic, but also those referring to noise, temperature, humidity and lighting. The obtained samples have been analyzed in the laboratory according to the official methods and the results are going to be defined in detail along the study. Finally, referring to security and prevention, several proposals for improvement, preventive and corrective measures has been taken to limit or eliminate the obtained risks of the evaluation.[ES] En las actividades profesionales en las que se tiene contacto con animales, los empleados están expuestos a un riesgo higiénico asociado a las zoonosis, grupo de enfermedades de los animales que son transmitidas al hombre por contagio directo con el animal enfermo, a través de algún fluido corporal como orina o saliva, o mediante la presencia de algún intermediario como pueden ser los mosquitos u otros insectos. Además, pueden existir en el ambiente laboral algunos microorganismos que pueden resultar peligrosos para el trabajador. En la granja objeto del estudio, las tareas que se desarrollan no implican una manipulación o un uso deliberado del agente biológico, a pesar de esto, puede llegar al trabajador a través del contacto con humanos o animales infectados, a través del tratamiento de sus productos, o mediante el contacto con elementos o medios donde dicho agente vive o puede sobrevivir (materiales, agua, suelo, aire, alimentos, residuos...), sirviendo todos ellos como fuentes de exposición. También se ha evaluado la calidad ambiental en todos sus aspectos y los peligros que pudieran llegar a provocar algún accidente durante el desarrollo de las actividades propias de la explotación. El objetivo principal del presente estudio ha sido determinar y analizar los riesgos generales existentes en la granja de pequeños rumiantes de la Universidad Politécnica de Valencia (UPV), tanto los referidos a la especialidad de la higiene industrial como a los incluidos en la ergonomía y la seguridad en el trabajo, siendo necesario para ello, el conocimiento en profundidad de la granja, sus trabajadores y las tareas que realizan en ella. Para llegar a cumplir este objetivo, se ha desarrollado un plan de trabajo que ha consistido en primer término en el conocimiento de la granja y de todos sus trabajadores, como ya se ha comentado, y en estudiar las tareas que estos realizan para poder realizar una evaluación precisa y real de los riesgos a los que están expuestos. Se han realizado tomas de muestras y mediciones para realizar un análisis de los riesgos existentes referentes no solo a los higiénicos, si no a los relacionados también con el ruido, la temperatura, la humedad o la iluminación. Se han analizado en el laboratorio las muestras obtenidas, según los métodos oficiales de análisis y se han obtenido unos resultados que se detallan en el estudio. Para finalizar, en cada una de las especialidades de la seguridad y la prevención, se han realizado propuestas de mejora, medidas preventivas y correctoras que limiten o eliminen los riesgos obtenidos en la evaluaciónGadea Fajardo, JL. (2015). Análisis de riesgos laborales en la granja de pequeños rumiantes de la Universitat Politècnica de València. http://hdl.handle.net/10251/64835Archivo delegad

The ABCF3 Gene of Arabidopsis Is Functionally Linked with GCN1 but Not with GCN2 During Stress and Development

[EN] One of the main mechanisms regulating translation is the one based on the phosphorylation of the alpha subunit of the translation initiation factor 2 (eIF2 alpha) by the general control non-repressive 2 (GCN2) protein kinase. In yeast, this kinase binds to two scaffold proteins (GCN1 and GCN20), facilitating its activation on translating ribosomes. The homology of the three proteins exists in Arabidopsis. In this species, whereas the kinase is activated under several stress situations, the involvement of the scaffold proteins in those processes is controversial, and a new role for GCN1 in translation, independent of the phosphorylation of eIF2 alpha, has been proposed. Arabidopsis presents five genes with homology to GCN20 (ABCF1 to 5) in its genome. We show here that any of these five genes is needed for eIF2 alpha phosphorylation. Furthermore, plant phenotypes under abiotic stresses and chloroplast development suggest that ABCF3 is functionally linked with GCN1, but not with GCN2. Finally, gcn1 and abcf3 mutants share similar transcriptional reprogramming, affecting photosynthesis and stress responses. The common downregulation of regulators of the flagellin receptor FLS2 in both mutants suggest that the observed defect in pathogen-associated molecular pattern (PAMP)-induced stomatal closure of these two mutants could be mediated by these proteins.This work was funded by the Spanish Ministerio de Ciencia e Innovacion (MICINN), reference BFU2011-22526. Vigya Kesari thanks the EC for an Erasmus Mundus postdoctoral fellowship.Faus, I.; Niñoles Rodenes, R.; Kesari, V.; Gadea Vacas, J. (2021). The ABCF3 Gene of Arabidopsis Is Functionally Linked with GCN1 but Not with GCN2 During Stress and Development. Plant Molecular Biology Reporter. 39(4):663-672. https://doi.org/10.1007/s11105-021-01283-wS66367239

Evolutionary optimization of neural networks with heterogeneous computation: study and implementation

In the optimization of artificial neural networks (ANNs) via evolutionary algorithms and the implementation of the necessary training for the objective function, there is often a trade-off between efficiency and flexibility. Pure software solutions on general-purpose processors tend to be slow because they do not take advantage of the inherent parallelism, whereas hardware realizations usually rely on optimizations that reduce the range of applicable network topologies, or they attempt to increase processing efficiency by means of low-precision data representation. This paper presents, first of all, a study that shows the need of heterogeneous platform (CPU–GPU–FPGA) to accelerate the optimization of ANNs using genetic algorithms and, secondly, an implementation of a platform based on embedded systems with hardware accelerators implemented in Field Pro-grammable Gate Array (FPGA). The implementation of the individuals on a remote low-cost Altera FPGA allowed us to obtain a 3x–4x acceleration compared with a 2.83 GHz Intel Xeon Quad-Core and 6x–7x compared with a 2.2 GHz AMD Opteron Quad-Core 2354.The translation of this paper was funded by the Universitat Politecnica de Valencia, Spain.Fe, JD.; Aliaga Varea, RJ.; Gadea Gironés, R. (2015). Evolutionary optimization of neural networks with heterogeneous computation: study and implementation. The Journal of Supercomputing. 71(8):2944-2962. doi:10.1007/s11227-015-1419-7S29442962718Farmahini-Farahani A, Vakili S, Fakhraie SM, Safari S, Lucas C (2010) Parallel scalable hardware implementation of asynchronous discrete particle swarm optimization. Eng Appl Artif Intell 23(2):177–187Curteanu S, Cartwright H (2011) Neural networks applied in chemistry. i. Determination of the optimal topology of multilayer perceptron neural networks. 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Int J Comput Appl 52(6): 1–7, August, published by Foundation of Computer Science, New York, USAhttp://www.altera.comAliaga R, Gadea R, Colom R, Cerda J, Ferrando N, Herrero V (2009) A mixed hardware–software approach to flexible artificial neural network training on fpga. In: Systems, architectures, modeling, and simulation, 2009. SAMOS ’09. International symposium on, July, pp 1–8http://www.matlab.co