Results 31 to 40 of about 15,345 (161)

El litio en Argentina

open access: yesCiencia, Tecnología y Política, 2022
Las importantes reservas de litio y el auge de inversiones destinadas a proyectos extractivos de los últimos años ubicaron a la Argentina entre los principales exportadores de carbonato de litio.
Agustín Barberón
doaj   +1 more source

Do ouro e das pedras coradas ao lítio: mineração, extrativismo e a reprodução da minero-dependência na Região Geográfica Imediata de Araçuaí – Vale do Jequitinhonha (MG)

open access: yesRevista Espinhaço
Este artigo explora a trajetória histórica do Vale do Jequitinhonha, desde a colonização no século XVIII, impulsionada pela mineração de ouro e diamantes, até as dinâmicas socioeconômicas atuais.
Marcos Antônio Nunes   +3 more
doaj   +1 more source

Application of Electrical Capacitance Tomography for Imaging Conductive Materials in Industrial Processes

open access: yesJournal of Sensors, Volume 2019, Issue 1, 2019., 2019
This paper presents highly robust, novel approaches to solving the forward and inverse problems of an Electrical Capacitance Tomography (ECT) system for imaging conductive materials. ECT is one of the standard tomography techniques for industrial imaging. An ECT technique is nonintrusive and rapid and requires a low burden cost. However, the ECT system
Wael Deabes   +4 more
wiley   +1 more source

Dicotomías técnicas para la "inevitabilidad" de la extracción de litio en América Latina

open access: yesRevista Kawsaypacha
A partir del año 2015, aumentó considerablemente la demanda y el precio del litio debido a su rol central en la producción de baterías. América Latina posee alrededor del 60% de las reservas de litio a nivel mundial.
Guillermo Folguera
doaj   +1 more source

Global Stabilization of Nonlinear Networked Control System with System Delays and Packet Dropouts via Dynamic Output Feedback Controller

open access: yesMathematical Problems in Engineering, Volume 2015, Issue 1, 2015., 2015
The stabilization problem is investigated for a class of nonlinear discrete‐time networked control systems (NCSs). Nonideal network Quality of Services (QoS) are considered, more specifically data packet dropouts and network‐induced delays. A state feedback controller for a class of NCSs is proposed.
Kheir Eddine Bouazza, Giacomo Innocenti
wiley   +1 more source

On X‐valued sequence spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 20, Issue 1, Page 47-50, 1997., 1995
Certain spaces of X‐valued sequences are introduced and some of their properties are investigated. Köthe‐ Toeplitz duals of these spaces are examined.
S. Pehlivan
wiley   +1 more source

La energía del Litio en Sudamérica

open access: yesEntreciencias: Diálogos en la Sociedad del Conocimiento, 2017
Una causa central del cambio ambiental global reside en la emisión de CO2 emitidos por el tipo de matriz energética predominante, basada en combustibles fósiles.
Julián Zicari, Bruno Fornillo
doaj   +1 more source

Minero-metallurgical processes for lithium recovery from pegmatitic ores = Processos minero-metalúrgicos para a recuperação de lítio de minérios pegmatíticos [PDF]

open access: yes, 2014
: With the expected increase of lithium demand in the forthcoming years, an efficient management of all the available resources is necessary. Rock minerals like pegmatites are important primary sources of lithium that shall be valorized.
Durão, F.   +4 more
core  

Acute Supplementation of Beta‐Hydroxybutyrate Increases Visual Cortical Excitability in Humans: A Combined Electro‐EncephaloGraphy and Magnetic Resonance Spectroscopy Study

open access: yesEuropean Journal of Neuroscience, Volume 62, Issue 7, October 2025.
Elevated plasma β‐hydroxybutyrate levels achieved by acute supplementation increased occipital glutamate (but not GABA+) levels and enhanced visual cortical excitability, as measured by larger steady‐state visual evoked potentials. The glutamate increase correlated with the increased steady‐state visual evoked potentials amplitude.
Cecilia Steinwurzel   +6 more
wiley   +1 more source

An application of the Sakai′s theorem to the characterization of H*‐algebras

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 18, Issue 2, Page 317-322, 1995., 1995
The well‐known Sakai′s theorem, which states that every derivation acting on a von Neumann algebra is inner, is ,used to obtain a new elegant proof of the Saworotnow′s characterization theorem for associative H*‐algebras via two‐sided H*‐algebras. This proof completely avoids structure theory.
Borut Zalar
wiley   +1 more source

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