Results 91 to 100 of about 264,579 (261)

Gobernanza del gas natural no convencional para el desarrollo sostenible de América Latina y el Caribe: experiencias generales y tendencias en la Argentina, el Brasil, Colombia y México [PDF]

open access: yes, 2015
El presente estudio tiene por objeto relacionar la problemática del desarrollo sostenible con la explotación de gas natural no convencional a nivel general y en específico para los países seleccionadosResumen .-- Introducción .-- I.
Arroyo, Andrés, Perdriel, Andrea
core  

Dimensión socioambiental del cambio climático para la implementación de medidas de adaptación socialmente aceptables

open access: yes, 2017
El cambio climático atípico, provocado mayormente por el estilo de vida posmodernista, ha sido estudiado desde su perspectiva ambiental. Sin embargo, es necesario atenderlo desde su dimensión socioambiental ya que la actividad humana actual es su ...
Gama-Campillo, Lilia María   +1 more
core   +2 more sources

A Compact Spin‐Coated Graphene UWB Antenna for Breast Tumor Detection

open access: yesAdvanced Engineering Materials, EarlyView.
A compact, spin‐coated graphene ultra‐wideband patch antenna designed for breast tumor detection, capable of distinguishing between malignant and benign tumors. This innovative antenna can serve as an effective initial screening tool, particularly in resource‐limited settings such as rural areas, where access to advanced medical equipment like MRI and ...
Raja Rashidul Hasan   +9 more
wiley   +1 more source

Notes on Natural Law from the Perspective of Classical Realism

open access: yes, 2010
This article pretends to provide an insight of the classical conception of Natural Law, as a rule derived from the ontological constitution of man. While the core of the natural normativity (the basic principles of natural law) is known by intuition, its
Herrera Pardo, Camila Francisca
core  

Mitos y realidades de la dimensión ambiental

open access: yes, 2020
Context: The environmental topic in Colombia has occupied a relevant área in the country for several decades, a situation that has permeated the academic community.
Cortes Castillo, Denisse Viviana   +2 more
core   +1 more source

Zein‐Based Adhesives: Sustainable Extraction and Application in Bioadhesive Technologies

open access: yesAdvanced Engineering Materials, EarlyView.
Zein is extracted from corn gluten meal using a simple and scalable process with high yield (~90%). The resulting protein is applied in bioadhesives modified with Ca2+ and Fe3+ ions, exhibiting substrate‐dependent adhesion. The findings demonstrate competitive bonding performance and highlight the role of ionic interactions in tuning adhesion ...
Paula Bertolino Sanvezzo   +3 more
wiley   +1 more source

Fingerprints Authentication Using Grayscale Fractal Dimension

open access: yesAl-Mustansiriyah Journal of Science, 2019
Characterizing of visual objects is an important role in pattern recognition that can be performed through shape analysis. Several approaches have been introduced to extract relevant information of a shape.
Nadia. M. G. Alsaidi   +2 more
doaj   +1 more source

A Numerical–Experimental Approach for Multi‐Matrix Fiber‐Reinforced Plastics Characterization Using Finite Element Model Updating

open access: yesAdvanced Engineering Materials, EarlyView.
A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora   +4 more
wiley   +1 more source

Planificación familiar natural [PDF]

open access: yes, 1994
Family planning through natural means is the result of previous ethical and anthropological reflection. Deprived of this foundation, one easily falls prey to widespread errors regarding its inefficacy, its scarce demand and the difficulty of its ...
Fernandez-Crehuet, J. (Joaquín)   +1 more
core  

Enhancing Strength and Electrical Conductivity in Al–Zr–Sc Conductor Alloys Through Sn and Sr Microalloying and Two‐Step Aging Treatment

open access: yesAdvanced Engineering Materials, EarlyView.
Trace additions of Sn and Sr combined with a two‐step aging treatment are shown to enhance the microstructure and performance of Al–Zr–Sc conductor alloys. Strength and electrical conductivity increase concurrently through accelerated precipitation of fine Al3(Sc, Zr) precipitates and improved dislocation resistance, offering a cost‐effective pathway ...
Quan Shao   +3 more
wiley   +1 more source

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