Results 41 to 50 of about 1,976,040 (306)

A Simplified Laminar Flow Model for the Pultrusion of Glass Fiber/Polyethylene Terephthalate Commingled Yarns

open access: yesAdvanced Engineering Materials, EarlyView.
A simplified thermoplastic pultrusion model is developed to predict thermal fields in glass fiber/polyethylene terephthalate (GF/PET) composites with reduced computational cost. By combining effective material homogenization, validation against literature data, and Gaussian‐process‐based optimization, the study reveals how heating limits, pulling speed,
Elder Soares   +3 more
wiley   +1 more source

Política ambiental en México y su dimensión regional

open access: yesRegión y Sociedad, 2002
La política ambiental de México se estableció durante los años ochenta y noventa, pasó por la etapa de reformas neoliberales de la economía y transitó progresivamente hacia formas de operación que la integran al mercado ambiental global.
Jordy Micheli
doaj  

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

open access: yesAdvanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara   +8 more
wiley   +1 more source

High‐Temperature Phase Transformation in a V‐9Si‐6.5B Alloy: The Kinetic and Crystallographic Pathway From V5SiB2 to V8SiB4

open access: yesAdvanced Engineering Materials, EarlyView.
In situ synchrotron high‐energy X‐ray diffraction reveals the real‐time high‐temperature phase evolution of a ternary V‐9Si‐6.5B alloy. The study uncovers a kinetically delayed V5SiB2 → V8SiB4 transformation governed by massive structural and chemical barriers.
Zahra Sabeti   +4 more
wiley   +1 more source

Retomando fundamentos y paradigmas para el tránsito de la crisis ambiental hacia sociedades sustentables

open access: yesSociedad y Ambiente, 2016
El presente trabajo se propone discutir sobre la crisis ambiental actual y los argumentos que enmarcan la naturaleza del problema como crisis social de magnitudes planetarias y que involucra diversos ámbitos: cultura, educación, instituciones, historia ...
Carlos Francisco Ortiz Paniagua   +1 more
doaj   +1 more source

Rape Crisis Centre 1994 statistics and financial summary [PDF]

open access: yes, 1995
I have audited the financial statements above and opposite in accordance with Auditing Standards. In my opinion, the financial statements give a true and fair view of the statement of the company's affairs at 31 st December 1994, and of its results ...
Rape Crisis Centre.
core  

High‐Resolution Corrosion Fingerprinting of Alloy Libraries via Microdroplet Spectroelectrochemistry

open access: yesAdvanced Engineering Materials, EarlyView.
Ionic‐liquid microdroplet spectroelectrochemistry enables stable, localized electrochemical measurements over extended timescales. By coupling impedance spectroscopy, wetting analysis, finite‐element simulations, and operando Raman spectroscopy, it disentangles geometrical and electrochemical effects, opening new opportunities for rapid corrosion ...
Ekaterina Kurchavova   +3 more
wiley   +1 more source

La variable ambiental en el eje relacional centro-periferia según la perspectiva teórica Análisis de Sistema-Mundo. Un análisis en los roles de América Latina en su relación con los países centrales del sistema mundial

open access: yesEstudos Internacionais, 2019
Este artículo propone incorporar la crisis ambiental como variable en el eje relacional centro-periferia según la perspectiva teórica Análisis de Sistema-Mundo, en la búsqueda de identificar posibles cambios en sus flujos y en los roles de América Latina
Juan Pablo Vásquez Bustamante
doaj   +1 more source

Uniform Amorphization of Crystalline Silicon Surfaces Enabled by Deep Ultraviolet Femtosecond Laser Pulses

open access: yesAdvanced Engineering Materials, EarlyView.
Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali   +5 more
wiley   +1 more source

La educación superior y la crisis ambiental

open access: yesRECUS, 2016
En el trabajo se muestra un análisis del impacto ambiental de la especie humana desde su surgimiento, donde se exponen los rasgos fundamentales  de  la  evolución  de  los  impactos  ambientales derivados  de  la actividad  antrópica  hasta  nuestros ...
Antonio Vázquez Pérez   +2 more
doaj  

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