Results 21 to 30 of about 171,127 (133)

Asociación y Objetividad. La triple síntesis como respuesta de Kant al "problema de Hume"

open access: yesAnales del Seminario de Historia de la Filosofía
El objetivo del presente trabajo es mostrar en qué sentido la noción kantiana de objetividad teórica constituye una respuesta a lo que Kant denomina «problema de Hume».
Alberto López López
doaj   +1 more source

Síntesis de titanio silicalita (TS-1)

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2000
Se estudiaron varios parámetros en la síntesis de titanio silicalita (TS-1) tales como: relación SifTi, cantidad de compuesto orgánico adicionado y tiempo de añejamiento y agitación.
Sol Elena Giraldo-Buitrago   +3 more
doaj   +1 more source

Spectrograms of baleen whale records synthesized from Autoenconder architectures: CAE, VAE and CAE-LSTM

open access: yesRevista Elektrón, 2022
In this paper, different architectures of simple convolutional networks are analyzed to generate synthetic spectrograms corresponding to baleen whales. Simplicity in these models plays an important role in the implementations of these type of networks on
María Celeste Cabedio, Marco Carnaghi
doaj   +1 more source

Estudio comparativo de la heteroestructura CuO/CuWO₄ y los óxidos CuO y CuWO₄: validación de aplicaciones fotocatalíticas

open access: yesRevista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales
Se presenta un estudio comparativo de las propiedades estructurales, morfológicas y ópticas de la heteroestructura CuO/CuWO₄ y las de estos óxidos individuales. Un primer análisis estructural semicuantitativo reveló la formación de las fases CuO
Angela Mercedes Raba-Páez
doaj   +1 more source

Ruiz Artola, Inés: Formiści, la síntesis de la modernidad (1917-1922). Conexiones y protagonistas.

open access: yesBoletín de Arte, 2016
Libargo (2015), responde claramente a un estudio pormenorizado de un aspecto de las vanguardias artísticas europeas que ha pasado apenas desapercibido por la historiografía española: la revista polaca Formisci (1919-1921), precursora del arte moderno en ...
David Martín López
doaj   +1 more source

Nueva recurrencia periódica. A tale of 7 elements

open access: yesEducación Química, 2018
Se dice que cada vez menos gente lee, lo cual puede que no sea del todo cierto si se considera que nunca habíamos existido tantos seres humanos; pero, de lo que no cabe duda, es que cada vez más gente escribe.
Carlos Amador Bedolla
doaj   +1 more source

Synthetic Strategies for the Construction of Cyclobutane‐Fused Heterocycles

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
Cyclobutane‐fused heterocycles are important motifs commonly present in bioactive compounds, recognized for their rigid 3D structures that confer unique properties. However, synthesizing these compounds remains challenging. This review discusses current methods for their synthesis, such as photochemical, metal‐catalyzed, and Lewis acid‐mediated [2 + 2]
Michela Vargiu   +2 more
wiley   +1 more source

A General Stereochemical Model for Grignard Additions to α‐Alkoxy Nitrones: Density Functional Theory Evidence for an Intrinsic α‐Chelation‐Controlled Pathway

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
A comprehensive DFT conformational study of Grignard additions to α‐alkoxy nitrones reveals that the reaction proceeds through a dinuclear α‐chelated transition structure in which the nitrone oxygen coordinates two magnesium centers. Other common additives, such as zinc dichloride, boron trifluoride, and dimethylaluminum chloride, were also studied ...
Manuel Pedrón   +2 more
wiley   +1 more source

Statistical Downscaling of Daily Temperature and Precipitation From Regional Climate Models in Complex Mountain Terrain

open access: yesInternational Journal of Climatology, EarlyView.
The study provides insights for post‐processing climate model output in complex terrain, useful for climate change impact models. We compared different bias adjustment and downscaling techniques from quantile delta mapping to simple lapse rates. We developed a new spatial downscaling method based on principal components analysis, which showed superior ...
Michael Matiu   +4 more
wiley   +1 more source

Síntesis de un pigmento rojo a partir de nanopartículas de oro

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 2012
A simple method of synthesising red pigments for ceramic glazes, based on gold nanoparticles protected by a refractory oxide capsule, was developed. Gold nanoparticles of an appropriate size were obtained by reaction in an aqueous medium between an Au ...
Agut, P., Palacios, M. D., Mestre, S.
doaj   +1 more source

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