El realismo de la pintura de los 60

Lo que este trabajo se plantea es una reflexión a cerca de la sensibilidad artística post-segunda guerra mundial. Trata pues de intentar enlazar lógicamente los acontecimientos que tras la finalización de la segunda guerra mundial hicieron variar notablemente los planteamientos de la pintura occidental

CASPT2 study of the electronic structure and photochemistry of protonated N -nitrosodimethylamine (NDMA-H+ ) at 453 nm

In this work, we have studied the photodissociation of the protonated derivatives of N-nitrosodimethylamine [(CH3)2N–NO] with the CASPT2 method. It is found that only one of the four possible protonated species of the dialkylnitrosamine compound absorbs in the visible region at 453 nm, that is, N-nitrosoammonium ion [(CH3)2NH-NO]+. This species is also the only one whose first singlet excited state is dissociative to directly yield the aminium radical cation [(CH3)2NHN·]+ and nitric oxide. In addition, we have studied the intramolecular proton migration reaction {[(CH3)2N–NOH]+ → [(CH3)2NH–NO]+} both in the ground and excited state (ESIPT/GSIPT); our results indicate that this process is not accessible neither in the ground nor in the first excited state. Furthermore, as a first approximation, MP2/HF calculations on the nitrosamine–acid complex indicate that in acidic solutions of aprotic solvents, only [(CH3)2NH–NO]+ is formed.This work was supported by the Spanish Ministry of Science and Innovation (Grant No. MCIN/AEI/10.13039/501100011033) through Project No. PID2021-122613OB-I00. Funding for open access charge: Universidad de Málag

Eco‐Holonic 4.0 Circular Business Model to Conceptualize Sustainable Value Chain Towards Digital Transition

The purpose of this paper is to conceptualize a circular business model based on an Eco-Holonic Architecture, through the integration of circular economy and holonic principles. A conceptual model is developed to manage the complexity of integrating circular economy principles, digital transformation, and tools and frameworks for sustainability into business models. The proposed architecture is multilevel and multiscale in order to achieve the instantiation of the sustainable value chain in any territory. The architecture promotes the incorporation of circular economy and holonic principles into new circular business models. This integrated perspective of business model can support the design and upgrade of the manufacturing companies in their respective industrial sectors. The conceptual model proposed is based on activity theory that considers the interactions between technical and social systems and allows the mitigation of the metabolic rift that exists between natural and social metabolism. This study contributes to the existing literature on circular economy, circular business models and activity theory by considering holonic paradigm concerns, which have not been explored yet. This research also offers a unique holonic architecture of circular business model by considering different levels, relationships, dynamism and contextualization (territory) aspects

Agrupació i equilibri competitiu en el bàsquet professional NBA i ACB

Algunes lligues de bàsquet són més competides que unes altres. El nivell d’incertesa en la classificació final està estretament relacionat amb l’atractiu en la lliga. L’efectivitat d’un equip té una relació recíproca amb l’ambient emergent i crític: la competició. Els equips es veuen afectats per l’entorn que els envolta. El model competitiu influencia directament sobre la competició, d’aquesta manera petits canvis poden alterar dramàticament el resultat final. Hem comparat dos models esportius diferents per esbrinar el nivell de jerarquia d’aquestes competicions. Hem estudiat els resultats de dues lligues professionals de bàsquet: 18 temporades de la NBA (USA) i 14 de l’ACB (Espanya). Observem que els equips ACB es troben en tres nivells de rendiment (ràtio 0,15 ± 0,05; 0,45 ± 0,15; 0,8 ± 0,1). Però les dades de la NBA són menys disperses i més gaussianes (ràtio punta 0.5). Una anàlisi general (Entropia de Shannon) mostra que l’equilibri competitiu no roman estable (Sn NBA mitjana = 0,9842 ± 0,0037; Sn ACB mitjana = 0,9793 ± 0,0053). Un estudi més detallat (anàlisi de clúster) mostra que a l’ACB hi ha equips clarament arrelats en un àrea particular de la competició. La majoria dels equips de la NBA han arribat els playoffs. No existeix un consens per a l’estudi d’equilibri competitiu. Proposem l’ús de diverses metodologies amb la finalitat d’esbrinar el grau de competitivitat d’una lliga determinada. El model esportiu influencia altament en els nivells d’equilibri competitiu. Tant l’ACB i la NBA presenten un alt equilibri competitiu. La NBA té mecanismes específics per assegurar l’alta competitivitat i l’ACB no compleix amb l’absència de dominació a llarg termini

ITERL: A Wireless Adaptive System for Efficient Road Lighting

This work presents the development and construction of an adaptive street lighting system that improves safety at intersections, which is the result of applying low-power Internet of Things (IoT) techniques to intelligent transportation systems. A set of wireless sensor nodes using the Institute of Electrical and Electronics Engineers (IEEE) 802.15.4 standard with additional internet protocol (IP) connectivity measures both ambient conditions and vehicle transit. These measurements are sent to a coordinator node that collects and passes them to a local controller, which then makes decisions leading to the streetlight being turned on and its illumination level controlled. Streetlights are autonomous, powered by photovoltaic energy, and wirelessly connected, achieving a high degree of energy efficiency. Relevant data are also sent to the highway conservation center, allowing it to maintain up-to-date information for the system, enabling preventive maintenance.Consejería de Fomento y Vivienda Junta de Andalucía G-GI3002 / IDIOFondo Europeo de Desarrollo Regional G-GI3002 / IDI

Last minute in NBA games

Apparently the behavior during a basketball game, as in other team sports, shows tremendous variability manifested in both individual and collective ways. However, when a significant number of games are studied, we can observe the unpredictability that characterizes the game. The degree of complexity of the game is not stable. Patterns change during all the game time, but the last minute is completely different reality. Our aim was to test and evaluate the existence of these patterns and their apparent complexity, by analyzing the NBA games scoring and substitution dynamics. Therefore, we examined the difference between the last minute and the rest of the game from the collected scores (1, 2 and 3 points), substitutions and timeouts. The underlying chaotic behavior of nonlinear interactions is inherent in Complex Systems. The data showed the existence of symmetries and repeated patterns of play during basketball games of the NBA but the last minute, which can be considered a completely different game.Aparentemente, el comportamiento del juego durante un partido de baloncesto, igual que en el resto de deportes de equipo, muestra una enorme variabilidad que se manifiesta tanto en las acciones individuales y en las colectivas. No obstante, cuando se estudia una cantidad significativa de partidos se detecta que, dentro de la impredecibilidad que caracteriza al juego, existen, al menos en el baloncesto NBA, patrones de comportamiento repetitivos que, frecuentemente, son libres de escala. El grado de complejidad del juego no es estable. Diferentes investigaciones muestran como los patrones cambian entre el primer y segundo tiempo del partido, así como, primer y tercer cuarto respecto al segundo y cuarto, o la parte inicial, mitad o final de cada cuarto. Nuestro objetivo fue comprobar y evaluar la existencia de estos patrones, y su aparente complejidad, analizando el final de los partidos de la NBA y comparando esta fase del encuentro con el final de cada uno de los cuartos. Los datos muestran la existencia de simetrías (fractalidad) y patrones repetidos de juego durante los partidos de baloncesto de la NBA

Nonuniversal large-size asymptotics of the Lyapunov exponent in turbulent globally coupled maps

Globally coupled maps (GCMs) are prototypical examples of high-dimensional dynamical systems. Interestingly, GCMs formed by an ensemble of weakly coupled identical chaotic units generically exhibit a hyperchaotic “turbulent” state. A decade ago, Takeuchi et al. [Phys. Rev. Lett. 107, 124101 (2011)] theorized that in turbulent GCMs the largest Lyapunov exponent (LE), λ(N), depends logarithmically on the system size N: λ∞−λ(N)≃c/lnN. We revisit the problem and analyze, by means of analytical and numerical techniques, turbulent GCMs with positive multipliers to show that there is a remarkable lack of universality, in conflict with the previous prediction. In fact, we find a power-law scaling λ∞−λ(N)≃c/Nγ, where γ is a parameter-dependent exponent in the range 0<γ≤1. However, for strongly dissimilar multipliers, the LE varies with N in a slower fashion, which is here numerically explored. Although our analysis is only valid for GCMs with positive multipliers, it suggests that a universal convergence law for the LE cannot be taken for granted in general GCMs.D.V. acknowledges support by Agencia Estatal de Investigación (Spain), and European Social Fund (EU) under Grant No. BES-2017-081808 of the FPI Programme. We acknowledge support by Agencia Estatal de Investigación (Spain), and European Regional Development Fund (EU) under Project No. FIS2016-74957-P (AEI/FEDER, EU)