Automatic software tailoring for Green Internet of Things

The proliferation of low-capacity, interconnected Internet of Things devices has increased the need for energy efficient software. Optimizing software performance for specific hardware requires tailored code transformations, as universal compiler optimizations are insufficient. Moreover, the diversity of devices and the software running on them requires automating this process. This work presents a novel combinatorial optimization problem focused on minimizing software energy consumption for specific hardware, and a methodology for solving it that accounts for system uncertainty. Additionally, a novel device for measuring the energy consumption during run time is introduced. This meter synchronizes with the experiments, enabling the automatic optimization of software as a combinatorial optimization problem. Specifically, the problem involves finding an LLVM transformation sequence that minimizes energy consumption during software execution. In our experiments, we considered two different software benchmarks and two embedded devices, using a cellular genetic algorithm to optimize them, alongside five state-of-the-art approaches to manage uncertainty. Our results demonstrate that the proposed methodology successfully overcomes uncertainty, leading to greener solutions with improvements of up to 62.29% in run time and up to 58.21% in energy consumption, outperforming the best generic compilation flags by up to 32.12% in run time and 27.84% in energy consumption

The natural extension to PDEs of Lie's reduction of order algorithm for ODEs

n this paper, we further consider the symmetry-based method for seeking nonlocally related systems for partial differential equations. In particular, we show that the symmetry-based method for partial differential equations is the natural extension of Lie's reduction of order algorithm for ordinary differential equations by looking at this algorithm from a different point of view. Many examples exhibit various situations that can arise

3D-Printing of Highly Piezoelectric Barium Titanate Polymer Nanocomposites with Surface-Modified Nanoparticles at Low Loadings

This work describes the development and characterization of tetragonal barium titanate nanoparticles (BTO NPs) and their surface functionalization with dopamine dodecylamine (DDA), a lipophilic organic ligand. The so-obtained lipophilic NPs (BTO-DDA) are then formulated at low loadings (< 5 wt.%) into liquid photocurable resins for vat photopolymerization (VP) and 3D printed into solid objects. The printed composites are mechanically characterized in order to assess the effect of the nanomaterial on the mechanical properties of the 3D printed polymer, revealing no significant variations in the mechanical properties (tensile or flexural) of the nanocomposites compared to the original polymer matrix. In light of these results, the printed nanocomposites are studied in terms of their capacity to generate a separation of charge by the piezoelectric effect, typical of the BTO crystal structure. This study reveals that BTO-loaded nanocomposites display outstanding piezoelectric coefficients as high as 50 pC/N when BTO-DDA is formulated at 3.0 wt.%, only slightly less than one-third of the piezoelectric coefficient previously reported for bulk BTO, while preserving the mechanical properties of the polymer matrix

A Real-Time Combined Dynamic Control Framework for Multi-Energy Microgrids Coupling Hydrogen, Electricity, Heating and Cooling Systems

While the energy management and control techniques have been extensively studied in electrical microgrids, optimizing electrical networks alongside other energy vectors, such as hydrogen, heating and cooling systems, remains a significant challenge. Effective real-time control management within multi-energy microgrids (MEMGs) is particularly challenging due to the intermittent and unpredictable nature of renewable energy sources and varying multi-energy demand. Existing research on MEMGs often lacks a holistic, real-time approach that simultaneously incorporates multiple intelligent techniques. Furthermore, the integration of co-generation systems, particularly those involving hydrogen and gas technologies, presents additional challenges in optimizing MEMG operations. This paper proposes a novel dynamic control strategy that directly addresses these challenges by integrating fuzzy logic (FL), model predictive control (MPC), and nonlinear optimization in real time. The strategy is designed to enhance MEMG performance by seamlessly coordinating multiple energy vectors, with a particular focus on the effective management of hydrogen storage and electrical batteries within a hybrid energy storage system (HESS). The objective is to minimize operational costs, gas consumption, and grid dependence, while maximizing system flexibility. The strategy is applied to an 8-unit residential building in Cardiff, UK, equipped with a photovoltaic plant, fuel cell, electrolyzer, hydrogen storage, battery, gas and electric boilers, chiller, and a combined heat-and-power unit. When compared to two alternative strategies—one that does not consider optimal cost allocation and another using a states-based EMS—the proposed framework yields a substantial reduction in costs by 33.86% and 18.38%. Gas consumption is reduced by 7.41% and 3.15%, respectively, while the HESS state of energy increases significantly by 100.06% and 20.02%, respectively. Furthermore, real-time experimental validation corroborates the practicality and efficacy of the proposed frameworkThis work was partially supported by Ministerio de Ciencia e Innovación, Agencia Estatal de Investigación, and Unión Europea “NextGenerationEU/PRTR” (Grant TED2021-129631B-C32 supported by MCIN/AEI/10.13039/501100011033 and NextGenerationEU/PRTR

Short-period cross-strait internal waves from wave-topography-hydrodynamics interactions: Observations and 3-D model results in the strait of Gibraltar

The origin, characteristics, and behavior of cross-strait short-period internal waves in the Strait of Gibraltar are analyzed, by means of a 3D, baroclinic, non-hydrostatic, hydrodynamic model, as well as satellite SAR images. The origin of these cross-strait waves was found to be related to the reflection of the main longitudinal (alongstrait) internal wave on the continental shelf slope, where the reflected wave is firstly arrested by the eastward tidal current, and then released towards the northern coast once this tidal current has weakened enough to achieve its subcritical value. The main example of this topographic wave interaction is the cross-strait internal wave reflected from the African shore east of Tangier Bay, which propagates north-westwards towards the Iberian coast near Tarifa. Other waves along the Strait are also found. The latter explains the presence of internal waves in unexpected directions of propagation at times far later than the main longitudinal wave at certain locations, all of them with plausible influence on mixing processes, upwelling phenomena and biogeochemical activity in the area

Prevalence and epidemiological characteristics of chronic pain in the Spanish population. Results from the pain barometer

Background: Chronic pain (CP) is a public health problem worldwide. Aim: To update the prevalence of CP and compare the clinical and social characteristics of people with CP with those with non-chronic continuous pain and a group without pain. Methods: An observational cross-sectional study was carried out in a representative sample of 7058 adults from the Spanish population. Sociodemographic data, the presence of CP and non-chronic continuous pain, characteristics of pain, limitations on activities of daily living (ADL), the presence and level of anxiety and depression (HADS), quality of life (SF-12v2) and social support (DUKE) were collected. Descriptive and bivariate analyses were performed. Results: The prevalence of CP was 25.9% (95% CI;24.8–26.9) and that of non-chronic continuous pain was 7.7% (95% CI;7.1–8.3). Women presented a higher prevalence of both CP (30.5% vs. 21.3%) and non-chronic continuous pain (8.8% vs. 6.6%). CP was more common in the group between 55 and 75 years old (30.6%, 95% CI = 28.6–32.6%), non-chronic continuous pain affected most the population between 18 and 34 years old (11.2%, 95% CI = 9.6–12.7%). The median duration of CP was 4 years. The lumbar was the most frequent pain site (58.1%), and 27.1% did not know the cause. A greater frequency of limitations on ADL, more anxiety and depression, and worse quality of life were shown among the subjects with CP. Conclusion: CP affects one in four Spanish people and impairs the mental, physical and social health. Differences exist by sex and age in its frequency. Identifying subjects with non-chronic continuous pain is fundamental to prevent their pain from becoming chronic. Significance Statement: Indicating the main aspects where this work adds significantly to existing knowledge in the field, and if appropriate to clinical practice. Due to its high prevalence and impact on quality of life, chronic pain has become one of the main health problems nowadays. Attention must be paid to it both from a clinical and social perspective, trying to raise awareness among the population of its possible causes and consequences. In routine clinical practice, greater consideration is given to groups of people with a higher prevalence of chronic pain, such as women and people with middle age, and with no chronic pain to prevent the appearance of chronic pain

Study of the factors that influence the disclosure of emissions reduction objectives of companies in the Spanish Continuous Market

Este trabajo estudia los factores determinantes de la divulgación de información de sostenibilidad a través del cuestionario CDP de cambio climático, así como la divulgación de objetivos de reducción de emisiones. La muestra se centra en empresas que cotizan en el mercado continuo español en el período de 2022. Así, la novedad de este trabajo es que se estudian las empresas de todo el mercado continuo español, respondan o no al cuestionario CDP. Los resultados obtenidos evidencian que los principales factores determinantes de la divulgación de información sostenible en el cuestionario CDP de las empresas del mercado continuo español son el tamaño y valor de la empresa; la rentabilidad de esta y la pertenencia al índice IBEX35.This work studies the determining factors of the disclosure of sustainability information through the CDP climate change questionnaire, as well as the disclosure of emissions reduction objectives. The sample focuses on companies listed on the Spanish continuous market in the period of 2022. Thus, the novelty of this work is that companies from the entire Spanish continuous market are studied, whether or not they respond to the CDP questionnaire. The results obtained show that the main determining factors of the disclosure of sustainable information in the CDP questionnaire of companies in the Spanish continuous market are the size and value of the company; its profitability and its membership in the IBEX35 index

Dosier de la exposición INVENTARIO DE UNA AMISTAD. CARLOS EDMUNDO DE ORY / FERNANDO NIEVA (1948-2012)

Dosier de la exposición INVENTARIO DE UNA AMISTAD. CARLOS EDMUNDO DE ORY / FRANCISCO NIEVA (1948-2012), organizada por la Fundación Carlos Edmundo de Ory a partir de sus fondos documentales. Tuvo lugar del 18 de enero al 2 de febrero de 2025 en el espacio cultural Ancha 16 de Cádiz. Se hicieron 4 visitas guiadas, a cargo de la comisaria Ana Sofía Pérez-Bustamante, y se incluyeron en el programa de las XIII Jornadas de la Fundación Ory, dedicadas a "Vida alucinada. Escribir teatro en el centenario de Francisco Nieva". Estas jornadas fueron incluidas en el programa de Actividades Formativas de Doctorado de la UCA, coordinado por Rafael Gallé Cejudo. https://posgrado.uca.es/web/short/cursodoc.php?idcurso=991En 1945 el poeta Carlos Edmundo de Ory lanzó en Madrid, con su maestro Eduardo Chicharro y Silvano Sernesi, el Postismo: un sorprendente movimiento estético-literario de posvanguardia que no pudo prosperar en la España franquista. Francisco Nieva, aprendiz de pintor en la capital, conoció al joven Carlos en una exposición de pintura en 1948. Aquel encuentro fue para Nieva una epifanía que marcaría su iniciación en la vanguardia, y los dos jóvenes (de 24 y 23 años respectivamente) se hicieron inseparables. Tanto, que Ory se hospedó en casa del amigo durante dos años largos en que charlaron, trabajaron y patearon Madrid y sus tertulias envueltos en el sueño del Arte. Una de las singularidades de Ory fue su pasión documental y coleccionista: desde muy pronto conservó cuidadosamente toda su correspondencia, a menudo con copia de sus propias cartas, consciente de que estaba formando un archivo para la posteridad. Desde esta posteridad de 2025 la Fundación Carlos Edmundo de Ory presenta, en INVENTARIO DE UNA AMISTAD, el rastro de la relación amistosa y creativa entre Ory y Nieva. El material aquí expuesto refleja las cuatro fases de su larga relación: La Edad de Oro en el Madrid postista (1948-1952), que se recoge en las memorias de Nieva y los diarios de Ory y se traduce no solo en anécdotas asombrosas sino en un diálogo de cartas, poemas, dibujos y proyectos conjuntos. La Edad de Plata vino cuando ambos se instalaron de manera independiente en París, casados con mujeres francesas (1953-1963): años de relación intermitente, sobre todo epistolar, en que evolucionaron de manera distinta hasta que la separación matrimonial de Nieva los distanció. A partir de 1970 los nuevos aires del mayo francés empezaron a dar visibilidad a las propuestas creativas de Ory, reconocido como maestro por la joven generación del 70, y de Nieva, que tras la muerte de Franco se reveló como dramaturgo genial con su«teatro furioso». Fueron años de alianza estratégica en la reivindicación del postismo que les unió. El reencuentro personal de los viejos amigos tuvo lugar en Cádiz en 2003, cuando Ory fue nombrado Hijo Predilecto de la Provincia y con este motivo la Diputación Provincial le dedicó unas jornadas en las que intervino Nieva. La alegría del reencuentro, de reconocerse tan iguales al recuerdo al cabo de tanto tiempo, se refleja en sus últimas cartas. INVENTARIO DE UNA AMISTAD ofrece los pasos perdidos de dos extrañas vidas paralelas atravesadas por la transgresión surrealista y vividas con apasionada y apasionante intensidad.Fundación Carlos Edmundo de Ory / Ayuntamiento de CádizExposición del 18 de enero al 2 de febrero de 2025. El dosier ocupa 41 páginas que documentan exhaustivamente el material expuesto, las actividades celebradas y la cobertura mediática

A Risk Assessment of Underwater Cultural Heritage for Wave-Induced Hazards: The Impact of Climate Change on Cadiz Bay

The combination of future changes in sea levels and wave climate in coastal areas represents one of the greatest threats to the preservation of underwater cultural heritage (UCH). This study presents a new methodology to assess climate change’s impacts on UCH preservation in shallow waters, focusing on wave-induced hazards like decontextualization, scouring, and wear erosion. The approach uses hybrid downscaling of bias-corrected wave fields from the RCP4.5 and RCP8.5 CMIP5 scenarios. The methodology was applied in the Bay of Cadiz, where an overall reduction in wave energy flux was observed. However, local increases were detected in rocky outcrops and coastal areas with high UCH density. As a result, the shallow zones exhibited significant changes in decontextualization and scouring hazards. However, the most relevant risk changes were linked to wear erosion, particularly at sites on rocky outcrops near Cadiz. The methodology proposed in this study is essential for identifying areas with higher risk and for evaluating UCH preservation under future climate conditions. It offers an effective tool for discriminating sites at risk and for conducting a long-term assessment of these risks in coastal environments affected by climate change

Escuela Oficial de Náutica de Cádiz. Diapositivas sobre aparatos para instalaciones eléctricas.

En este documento digitalizamos las dispositivas utilizadas en la Escuela Oficial de Náutica de Cádiz, para enseñar instalaciones eléctricas a los Oficiales Radiotelegrafistas de la Marina Mercante, entre la década de los 60 y la de los 70 del Siglo XX. Formato pdf en color.En este documento digitalizamos las dispositivas utilizadas en la Escuela Oficial de Náutica de Cádiz, para enseñar instalaciones eléctricas a los Oficiales Radiotelegrafistas de la Marina Mercante, entre la década de los 60 y la de los 70 del Siglo XX