Results 21 to 30 of about 33,187 (185)

Efeitos do ato de desregulamentação de 1978 na indústria aeronáutica medidos pelo método da entropia estatística

open access: yesTransportes, 2022
Há muitos artigos e ensaios versando sobre os efeitos da deregulamentação de aviação civil em 1978, mas quase nenhum deles aborda os impactos na indústria aeronáutica e as ondas de imigração que ocorreram devido às passagens aéreas mais baratas.
Bento Silva de Mattos   +2 more
doaj   +1 more source

Investigação da resistência à compressão e da resistividade elétrica de concretos com diferentes tipos de cimento

open access: yesRevista ALCONPAT, 2014
RESUMO Nesse estudo foi possível observar a influência de quatro tipos de cimento brasileiros na resistência à compressão e na Resistividade Elétrica Superficial (RES) de amostras de concreto.
R. A. Medeiros-Junior   +3 more
doaj   +1 more source

Electrochemical Corrosion Behavior of Passivated Precipitation Hardening Stainless Steels for Aerospace Applications

open access: yesMetals, 2023
Precipitation-hardening (PH) stainless steels (SS) are widely used in various aerospace applications. These steels exhibit good mechanical and corrosion resistance.
José Villegas-Tovar   +9 more
doaj   +1 more source

The Italian Bombings over Valencia during the Spanish Civil War: A Photographic Study | Los bombardeos italianos sobre el País Valenciano durante la Guerra Civil española: un estudio fotográfico

open access: yesPasado y Memoria, 2016
During the Spanish Civil War, Valencia was one of the hardest hit areas by the air raids of the rebel army supported by their international allies, Italy and Germany.
Gaspar Díez Pomares
doaj   +1 more source

Descentralización de la Red Vial y Sistema Nacional de Cofinanciación

open access: yesCiencia e Ingeniería Neogranadina, 1996
En desarrollo del artículo 20 transitorio de la Constitución Política de Colombia, el gobierno Nacional expidió el Decreto 2171 de diciembre 30 de 1992, por medio del cual se reestructuró el Ministerio de Obras Públicas y Transporte como Ministerio de ...
Carlos Alberto Echeverry Arciniegas
doaj   +1 more source

A Research Study for the Design of a Portable and Configurable Ground Test System for the A400M Aircraft

open access: yesInternational Journal of Aerospace Engineering, Volume 2019, Issue 1, 2019., 2019
This paper presents a study of the most suitable ground test equipment for the Airbus A400M aircraft aimed at optimizing a design that combines portability, flexibility, and configurability. The study is based on current trends in the configuration of the different parts that are involved in the process of designing Aircraft Interface Modules (AIMs ...
Diego F. Larios   +4 more
wiley   +1 more source

Conceptual Design of an Unmanned Fixed‐Wing Aerial Vehicle Based on Alternative Energy

open access: yesInternational Journal of Aerospace Engineering, Volume 2019, Issue 1, 2019., 2019
This paper focuses on the aerodynamics and design of an unmanned aerial vehicle (UAV) based on solar cells as a main power source. The procedure includes three phases: the conceptual design, preliminary design, and a computational fluid dynamics analysis of the vehicle. One of the main disadvantages of an electric UAV is the flight time; in this sense,
Alan G. Escobar-Ruiz   +6 more
wiley   +1 more source

Effect of Heat Treatment on the Electrochemical Behavior of AA2055 and AA2024 Alloys for Aeronautical Applications

open access: yesMetals, 2023
Since their development, third-generation aluminum–lithium alloys have been used in aeronautical and other applications due to their good properties, replacing conventional Al-Cu and Al-Zn alloys and resulting in an increase in payload and fuel ...
Heriberto Rivera-Cerezo   +7 more
doaj   +1 more source

Analyzing Nonlinear Dynamics via Data‐Driven Dynamic Mode Decomposition‐Like Methods

open access: yesComplexity, Volume 2018, Issue 1, 2018., 2018
This article presents a review on two methods based on dynamic mode decomposition and its multiple applications, focusing on higher order dynamic mode decomposition (which provides a purely temporal Fourier‐like decomposition) and spatiotemporal Koopman decomposition (which gives a spatiotemporal Fourier‐like decomposition).
Soledad Le Clainche   +2 more
wiley   +1 more source

Verificación de los Pronósticos de Aeródromo en Cuba (Parte I)

open access: yesRevista Cubana de Meteorología, 2022
Se expone la metodología para la verificación de los pronósticos meteorológicos de aeródromo (TAF) emitidos por la Oficina Principal de Vigilancia Meteorológica perteneciente al Instituto de Aeronáutica Civil de Cuba.
Guillermo Armengol Matas   +1 more
doaj  

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