Results 71 to 80 of about 1,645,255 (259)

Abriendo la caja negra de la tecnología: una historiografía de las técnicas en Colombia

Anuario Colombiano de Historia Social y de la Cultura, 2017
Se ofrece una revisión historiográfica sobre la historia de la tecnología en Colombia desde el último tercio del siglo xx hasta el presente. La revisión se centró en dos tipos de literatura, de un lado, la historia económica, incluyendo la historia ...
Ericka Herazo
doaj   +1 more source

Propagation of gravity waves and spread F in the low-latitude ionosphere over Tucumán, Argentina, by continuous Doppler sounding: first results [PDF]

, 2014
Results of systematic analysis of propagation directions and horizontal velocities of gravity waves (GWs) and spread F structures in low-latitude ionosphere (magnetic inclination ~27°) in Tucumán region, Argentina, are presented.
Baše, J., Burešová, D., Cabrera, M. A., Cangemi, José Ignacio, Chum, J., Ezquer, Rodolfo Gerardo, Fišer, J., Hruška, F., Ise, Juan Eduardo, Laštovička, J., Miranda Bonomi, Fernando Alberto, Molina, Maria Graciela, Šindelářová, T.   +12 more
core   +2 more sources

Laser‐Induced Graphene from Waste Almond Shells

Advanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova, Anna Chiara Bressi, Marina Galliani, Attilio Marino, Gianni Ciofani, Eduardo Machado‐Charry, Hilda Gomez Bernal, Alessandra Francini, Luca Sebastiani, Francesco Greco   +9 more
wiley   +1 more source

Embryo culture in presence of oviductal fluid induces DNA methylation changes in bovine blastocysts [PDF]

, 2017
During the transit through the oviduct, the early embryo initiates an extensive DNA methylation reprogramming of its genome. Given that these epigenetic modifications are susceptible to environmental factors, components present in the oviductal milieu ...
Barrera, Antonio Daniel, Fonseca Balvís, Noelia, Garcia, Elina Vanesa, Gutiérrez Adan, Alfonso, Hamdi, Meriem, López Cardona, Ángela Patricia, Rizos, Dimitrios, Sánchez Calabuig, María Jesús   +7 more
core   +1 more source

Unleashing the Power of Machine Learning in Nanomedicine Formulation Development

Advanced Functional Materials, EarlyView.
A random forest machine learning model is able to make predictions on nanoparticle attributes of different nanomedicines (i.e. lipid nanoparticles, liposomes, or PLGA nanoparticles) based on microfluidic formulation parameters. Machine learning models are based on a database of nanoparticle formulations, and models are able to generate unique solutions
Thomas L. Moore, Cristiano Pesce, Antonietta Greco, Claudia Pisante, Greta Avancini, Valentina Di Francesco, Yosi Shamay, Paolo Decuzzi   +7 more
wiley   +1 more source

Las ciencias biológicas y el desarrollo científico y tecnológico de la República Dominicana

Ciencia y Sociedad, 1986
Este texto analiza el papel de la política científica y tecnológica, y dentro de ese contexto consiste en establecer principios y métodos junto con la disposiciónes ejecutivas y legislativas necesarias para estimular, movilizar y organizar el potencial ...
Rolando Bodden P
doaj   +1 more source

Characterisation of PVD-TiN coated austempered ductile iron: Effects of nodule count and austempering temperature [PDF]

, 2011
In this work PVD-TiN coatings are deposited on ADI substrates austempered at 280 and 360°C, with nodule counts varying between 490 and 1 100 nod/mm2. The deposition is performed at 300°C by the arc ion plating technique.
Colombo, Diego Alejandro, Echeverría, María D., Massone, Juan Miguel, Moncada, Osvaldo Julio   +3 more
core   +1 more source

Magnetic and Structural Response Tuned by Coexisting Mn Concentration‐Dependent Phases in MnBi2Te4 Thin Film Grown on GaAs(001) by Molecular Beam Epitaxy

Advanced Functional Materials, EarlyView.
The study explores structural and magnetic properties of one of the most recent topological quantum materials (MnBi2Te4). The Mn‐poor structure leads to stacking faults (quintuple layer ‐ QL of Bi2Te3 formation instead of a septuple layer ‐ SL of MnBi2Te4), resulting in a coexistence between weak antiferromagnetism and ferromagnetism.
Wesley F. Inoch, Sergio L. A. Mello, Gilberto Rodrigues‐Junior, Sukarno O. Ferreira, Marcelo M. Sant'Anna, Benjamin R. Salles, Mateus T. Souza, Sérgio L. Morelhão, Maybi F. Sampaio, Bráulio S. Archanjo, Leonarde N. Rodrigues   +10 more
wiley   +1 more source

La educación rural en Colombia: experiencias y perspectivas

Práxis Pedagógica, 2017
El presente texto presenta una reflexión sobre la situación de la educación rural en Colombia, sus aportes a la educación, su relación con la educación en tecnología y algunas experiencias frente a la educación rural en la localidad de Ciudad Bolívar.
Martha Lucia Carrero Arango, María Fernanda González Rodríguez   +1 more
doaj  

Ciencia y tecnología versus ideología

Ciencia y Sociedad, 1997
Este texto muestra un esquema en el cuál hay una diferencia entre la práctica cientifico-tecnologia y los productos ciientifico-tecnológicos. Dicho esquema supone una neutralidad científico-tecnológico, y por tanto una mistificación de los mismos.
Natasha Gómez Velázquez
doaj   +1 more source