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1دورية أكاديمية
المؤلفون: María D. Dapía Conde, María R. Fernández González
المصدر: Revista Iberoamericana de Educación, Vol 76, Pp 209-228 (2018)
مصطلحات موضوعية: formación inicial, escuela, universidad, educación social, profesionalización., Education (General), L7-991
الوصف: La Educación Social es una profesión reciente en el Estado español que está en construcción. A sus tres ámbitos de intervención tradicionales –Educación de Personas Adultas, Animación Sociocultural y Pedagogía del Ocio, y Educación Especializada–, se le han sumado otros ámbitos emergentes, como la escuela. En España, identificamos tres modelos diferentes seguidos en la incorporación de los/as educadores/as sociales en los centros escolares: a) educadores/as sociales adscritos de forma institucional, formando parte de los recursos humanos propios; b) educadores/as sociales pertenecientes a los Servicios Sociales municipales; y, c) proyectos liderados por educadores/as sociales, que se llevan a cabo en los centros escolares mediante entidades intermediarias, previa firma de un convenio con la administración autonómica educativa. Siendo una realidad la incorporación de la Educación Social a la escuela; aunque de forma dispar según las comunidades autónomas, nos plateamos, si la formación inicial que reciben los/as educadores/as sociales responde a las exigencias planteadas en la escuela en comunidades con tradiciones diferentes. Tras analizar los planes de estudio, los resultados indican que no se constatan diferencias en la formación y además esta formación responde a las exigencias de las convocatorias (temarios) así como a las funciones, con alguna adaptación necesaria. En consecuencia, la incorporación de la educación social en el ámbito escolar, fundamentalmente en educación secundaria existe, aunque permanece la necesidad de definir más precisamente el desempeño profesional (funciones), ampliar la plantilla haciéndola extensiva a más centros y continuar la reflexión acerca de una formación adecuada a las nuevas exigencias profesionales.
وصف الملف: electronic resource
العلاقة: https://rieoei.org/RIE/article/view/2857Test; https://doaj.org/toc/1022-6508Test; https://doaj.org/toc/1681-5653Test
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المؤلفون: K, Cañón-Beltrán, Y N, Cajas, R, Fernández-González, E, González, R M, García-García, M, Arias-Álvarez, P L, Lorenzo, D, Rizos, A, Gutiérrez-Adán
المصدر: Reproduction, fertility, and development. 34(2)
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=pmid________::b7ee9335522c6a4f4c07c0b8a41d14b0Test
https://pubmed.ncbi.nlm.nih.gov/35231221Test -
3دورية أكاديمية
المؤلفون: Rafael A. Espin-Andrade, Erick González Caballero, Witold Pedrycz, Eduardo R. Fernández González
المصدر: International Journal of Computational Intelligence Systems, Vol 8, Iss 100 (2015)
مصطلحات موضوعية: Archimedean fuzzy logic, Compensatory fuzzy logic, Electronic computers. Computer science, QA75.5-76.95
الوصف: The paper aims to define a new kind of logic, referred to as Archimedean-Compensatory Logic, which is constructed from the unification of two different fuzzy logic systems, namely a continuous Archimedean fuzzy logic and a compensatory fuzzy logic. The paper introduces basic definitions and properties of this new theory. Continuous Archimedean logic is a t-norm and t-conorm logic system and Compensatory Fuzzy Logic can be obtained from quasi-arithmetic mean operators. We will prove the property that the preference over a pair of truth-value vectors is the same for certain predicates in the Compensatory Fuzzy Logic and the Continuous Archimedean Logic.
وصف الملف: electronic resource
العلاقة: https://www.atlantis-press.com/article/25868673.pdfTest; https://doaj.org/toc/1875-6883Test
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المؤلفون: R. Fernández-González, Gabriel Blázquez, Mónica Calero, María Ángeles Martín-Lara, J.A. Moreno
المصدر: Journal of Cleaner Production. 227:634-644
مصطلحات موضوعية: Materials science, Renewable Energy, Sustainability and the Environment, 020209 energy, Strategy and Management, 05 social sciences, Biosorption, chemistry.chemical_element, Sorption, 02 engineering and technology, Zinc, Pulp and paper industry, Industrial and Manufacturing Engineering, chemistry, Wastewater, Plating, Mass transfer, SCALE-UP, Biochar, 050501 criminology, 0202 electrical engineering, electronic engineering, information engineering, 0505 law, General Environmental Science
الوصف: In this study, the removal of zinc from plating wastewaters using fixed bed columns packed with hydrolyzed olive cake was investigated. This work discusses the significance of the scale-up and provides a brief overview of the potential uses of exhausted biosorbent for the generation of zinc-based materials. First, biosorption studies were performed to analyze biosorption behavior of hydrolyzed olive cake in different sized columns. Influence of important design parameters such as contact time, linear velocity and bed height/diameter ratio on biosorption performance was studied. Results indicated a significant effect of contact time on scale-up. Higher bed depths increased the biosorption capacity due to a larger dose of absorbent in the packed columns. As the flow rate increased, the breakthrough time decreased and the exhaustion of the column was reached faster. In addition, operating at the same contact time and bed height/diameter ratio and at a linear velocity much higher in the pilot column, the zinc uptake capacity was found to be higher. Better biosorption results could be due to velocity influencing the mass transfer and hydraulics improving the fluid dispersion. Finally, exhausted biosorbent was subjected to different thermal treatments. Preliminary tests showed that zinc-loaded solid can be recycled for the generation of zinc-based materials.
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::3bc4ac05c4c8279703df54a3ce294a32Test
https://doi.org/10.1016/j.jclepro.2019.04.195Test -
5دورية أكاديمية
المؤلفون: Rafael Espín Andrade, Erick González Caballero, Witold Pedrycz, Eduardo R. Fernández González
مصطلحات موضوعية: Neural Network Fundamentals and Applications, Artificial Intelligence, Computer Science, Physical Sciences, Learning and Inference in Bayesian Networks, Type-2 Fuzzy Logic Systems and Applications, Fuzzy Logic Systems, Interval Type-2 Fuzzy Logic, Fuzzy Rule-Based Systems, Neuro-Fuzzy Methods, Fuzzy logic, Mathematics, FOS Mathematics, Algebra over a field, Computer science, Artificial intelligence, Pure mathematics
الوصف: The paper aims to define a new kind of logic, referred to as Archimedean-Compensatory Logic, which is constructed from the unification of two different fuzzy logic systems, namely a continuous Archimedean fuzzy logic and a compensatory fuzzy logic.The paper introduces basic definitions and properties of this new theory.Continuous Archimedean logic is a t-norm and t-conorm logic system and Compensatory Fuzzy Logic can be obtained from quasi-arithmetic mean operators.We will prove the property that the preference over a pair of truth-value vectors is the same for certain predicates in the Compensatory Fuzzy Logic and the Continuous Archimedean Logic. ... : تهدف الورقة إلى تعريف نوع جديد من المنطق، يشار إليه باسم المنطق التعويضي الأرخميدي، والذي تم إنشاؤه من توحيد نظامين مختلفين من المنطق الغامض، وهما المنطق الغامض الأرخميدي المستمر والمنطق الغامض التعويضي. تقدم الورقة التعريفات والخصائص الأساسية لهذه النظرية الجديدة. المنطق الأرخميدي المستمر هو نظام منطقي t - norm و t - conorm ويمكن الحصول على المنطق الغامض التعويضي من مشغلي المتوسط الحسابي شبه الحسابي. سنثبت الخاصية القائلة بأن التفضيل على زوج من متجهات قيمة الحقيقة هو نفسه بالنسبة لبعض المسوغات في المنطق الغامض التعويضي والمنطق الأرخميدي المستمر. ...
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المصدر: Bioresource Technology. 268:169-175
مصطلحات موضوعية: Environmental Engineering, 020209 energy, chemistry.chemical_element, Bioengineering, 02 engineering and technology, Manganese, Zinc, Wastewater, 010501 environmental sciences, 01 natural sciences, Mining, Water Purification, Hydrolysis, Chromium, Nickel, Metals, Heavy, Olea, 0202 electrical engineering, electronic engineering, information engineering, Biomass, Waste Management and Disposal, Effluent, 0105 earth and related environmental sciences, Renewable Energy, Sustainability and the Environment, Biosorption, General Medicine, Hydrogen-Ion Concentration, Pulp and paper industry, chemistry, Adsorption, Water Pollutants, Chemical
الوصف: The present study aims to solve two major challenges of the current society. On the one hand, it investigated the heavy metal removal from mining wastewater. On the other hand, it proposed an alternative use for olive cake. Firstly, a physic-chemical characterization of real wastewater and hydrolyzed olive cake was carried out. Secondly, a study of the affinity of the material for the different metals (chromium, manganese, copper, zinc, nickel and lead) was performed. The hydrolyzed olive cake showed a low content in ash (3.08%) and in water-soluble compounds (2.80%). The material presented the highest retention capacity for the lead (41.54 mg/g) and the lowest for the manganese (3.57 mg/g). After that, biosorption experiments in fixed-bed column were carried out using mining real water. In order to improve the biosorption capacity, the water pH was raised up to 6. The results were quite satisfactory with respect to others similar studies.
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad3ec4b8e7e15313af744ee411ba18ffTest
https://doi.org/10.1016/j.biortech.2018.07.124Test -
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المؤلفون: V.D. Rodríguez, R. Fernández-González, Jose J. Velázquez, Pedro Núñez, L. Díaz, E. Pulido Melián
المصدر: Journal of Alloys and Compounds. 721:405-410
مصطلحات موضوعية: Hydrogen, Chemistry, Mechanical Engineering, Inorganic chemistry, Metals and Alloys, chemistry.chemical_element, 02 engineering and technology, Activation energy, Atmospheric temperature range, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, chemistry.chemical_compound, Mechanics of Materials, Reagent, Materials Chemistry, Photocatalysis, Water splitting, Methanol, 0210 nano-technology, Hydrogen production
الوصف: TiO2 nano-particles based photocatalysts were modified with different Pt percentages photodeposited on the surface, optimizing the method in order to obtain the best performance for the production of hydrogen. For testing hydrogen production, a novel reaction setup equipped with an elliptical cylindrical reflector to focus the radiation on the reactor has been used, being possible to control the reaction temperature. The hydrogen production has been measured in continuous by means of mass spectrometry. The effects of the reaction temperature and of the sacrificial reagent (methanol, ethanol or isopropanol) on the photocatalytic activity of Pt-TiO2 were studied. The best results at 25 °C were achieved for 2 wt% Pt-TiO2 (2Pt-TiO2) using methanol as sacrificial reagent, with a large maximum production over 16.0 mmol g−1h−1, which decreases to the half of this value after a long period of 72 h. These H2 production rates are larger, by a factor close to 30, than the ones obtained for the commercial P25 TiO2 in the same experimental conditions. The effect of the reaction temperature was analyzed on 2Pt-TiO2/water and 2Pt-TiO2/water/MeOH systems in the temperature range 5–60 °C. The apparent activation energy was determined for both photocatalysts, obtaining values of 17.5 and 23.3 kJ mol−1, respectively. The hydrogen production increases continuously with temperature in this range, achieving at 60 °C a H2 production of 0.83 and 38.0 mmol g−1h−1 for the photocatalyst in water and water/MeOH, respectively, after 2 h of reaction time.
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::7c06f76ec64b4b84fe0d33f7f84cb775Test
https://doi.org/10.1016/j.jallcom.2017.05.314Test -
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المؤلفون: Jesús Canales-Vázquez, Pedro Núñez, Juan Carlos Ruiz-Morales, José R. Jurado, R. Fernández-González, Ahmed Makradi
المصدر: International Journal of Hydrogen Energy. 41:19731-19736
مصطلحات موضوعية: Materials science, Hydrogen, Renewable Energy, Sustainability and the Environment, Open-circuit voltage, Energy Engineering and Power Technology, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Electrochemistry, 01 natural sciences, 0104 chemical sciences, Anode, Fuel Technology, Mixed conductor, Chemical engineering, chemistry, Solid oxide fuel cell, 0210 nano-technology, Performance enhancement, Yttria-stabilized zirconia
الوصف: In this work, electrochemical improvement of the SOFC anode material was achieved through the modification of a NiO-YSZ anode composition with a further infiltration of a mixed conductor such as Ce0.8Gd0.2O2−δ (CGO20). This approach rendered improved power densities, 3 times better, compared to non-optimized systems, i.e. 160 mW cm−2 under pure hydrogen, measured at 700 °C, with an OCV of ∼1.1 V. A simple valuation cost survey of the proposed methodology indicated that the improved polarisations can obtained using about 176 mg of Ce(NO3)3·6H2O and 46 mg of Gd(NO3)3·6H2O per cm2. This is equivalent to a cost of 0.8 ∈ of the starting material per cm2 of active anode area.
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::15ad92ff0bd2849dc60a494455ee71e0Test
https://doi.org/10.1016/j.ijhydene.2016.03.092Test -
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المؤلفون: G. Tenorio, R. Fernández-González, Gabriel Blázquez, Mónica Calero, María Ángeles Martín-Lara
المصدر: Journal of Cleaner Production. 268:121935
مصطلحات موضوعية: Renewable Energy, Sustainability and the Environment, Strategy and Management, chemistry.chemical_element, Hydrochloric acid, Amberlite, Human decontamination, Pulp and paper industry, Copper, Industrial and Manufacturing Engineering, chemistry.chemical_compound, Adsorption, Wastewater, chemistry, Desorption, Effluent, General Environmental Science
الوصف: Olive cake, a solid waste resulting of olive-oil industry, was recycled as an adsorbent material for the decontamination of real fertilizer industry wastewater. Particularly, adsorption behaviour of the system working with columns in series and the effect of flow rate on the removal of copper were studied. The material exhibited a good adsorption capacity. The best results were obtained by working with three columns, reaching an adsorption capacity at exhaustion time of 7.32 mg g−1. At lower flow rate, higher removal of copper was obtained. Different models were analyzed to fit breakthrough curves and determine characteristic parameters of the system. Among all mathematical models studied, Dose–Response model fitted better the experimental data. The effect of addition of packed-bed columns with commercial resins (Amberlite XAD-4 and Dowex MAC-3) was also evaluated. Amberlite XAD-4 showed better results than Dowex MAC-3 but not as good as hydrolyzed olive cake. For example, at an operating time of 120 min, copper concentration in the effluent was 3.4 mg/L and 5.5 mg/L when Amberlite XAD-4 and Dowex MAC-3 were used, respectively. For regeneration and reuse of adsorbent, hydrochloric acid was investigated as eluting agent. Four adsorption–desorption cycles were performed with 0.5 M HCl. The desorption curves showed a high desorption rate. Also, the desorption yield changed from 86% to 67.1% when adsorption–desorption cycles were conducted. Overall, results suggested that the studied adsorbent will be useful for future scale-up for the removal of copper (II) of fertilizer wastewater.
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::d131b21c8dd684d99665196730fb941eTest
https://doi.org/10.1016/j.jclepro.2020.121935Test -
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المؤلفون: Anna Lukowiak, F. Rivera-López, Alessandro Chiasera, Pedro Núñez, J. Marrero-Jerez, Mariano Ferrari, Jose J. Velázquez, Fernando J. Lahoz, V.D. Rodríguez, R. Fernández-González, Rogéria Rocha Gonçalves
المصدر: RSC advances 6 (2016): 15054–15061. doi:10.1039/c5ra22630a
info:cnr-pdr/source/autori:Fernandez-Gonzalez, R.; Velazquez, J. J.; Rodriguez, V. D.; Rivera-Lopez, F.; Lukowiak, A.; Chiasera, A.; Ferrari, M.; Goncalves, R. R.; Marrero-Jerez, J.; Lahoz, F.; Nunez, P./titolo:Luminescence and structural analysis of Ce3+ and Er3+ doped and Ce3+-Er3+ codoped Ca3Sc2Si3O12 garnets: influence of the doping concentration in the energy transfer processes/doi:10.1039%2Fc5ra22630a/rivista:RSC advances/anno:2016/pagina_da:15054/pagina_a:15061/intervallo_pagine:15054–15061/volume:6مصطلحات موضوعية: Quenching (fluorescence), Materials science, Scanning electron microscope, General Chemical Engineering, Doping, Analytical chemistry, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Garnets, Freeze-drying precursor, Ce3+, Er3+, XRD, XPS, SEM, Energy transfer, PL, Time resolved spectroscopy, 0104 chemical sciences, Ion, X-ray photoelectron spectroscopy, Nanocrystal, Excited state, 0210 nano-technology, Luminescence
الوصف: We present research on Ca3Sc2Si3O12 garnets doped with Ce3+ and Er3+ ions that were synthesized by the freeze-drying precursor method. The structural characterization was performed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Scanning electron microscopy (SEM) images of the calcined material were studied. Nanocrystals of Ca3Sc2Si3O12 were obtained by calcining the precursor at 1200 degrees C for 4 h with a mean size of about 100 nm. The luminescence features of Ce3+ and Er3+ doped samples indicated that these ions are effectively incorporated into the crystalline phase. In addition, codoping with Ce3+-Er3+ ions results in energy transfer processes from Ce3+ to Er3+ ions which led to the enhancement of near-infrared luminescence at 1.5 mu m. The efficiency of this non-radiative energy transfer process has been studied by means of excited state dynamics as a function of the doping concentration. From these results we have found that near-infrared Er3+ luminescence efficiency under VIS Ce3+ excitation is at maximal for 1Ce(3+)-1Er(3+) codoped Ca3Sc2Si3O12 garnets (in mol%). Luminescence quenching at higher Er3+ ion concentrations is observed.
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd7b90d6953ae2a8c168d93b843b2bacTest
https://doi.org/10.1039/c5ra22630aTest
