Results 81 to 90 of about 3,352,077 (334)

A evolução das relações brasileiro-argentinas durante a república velha (1889 - 1930)

open access: yesRevista Multiface Online, 2019
This paper aims todiscuss theevolution of bilateral relations between Brazil andArgentinaover theperiodthat corresponds totheBrazilian OldRepublic. Theauthors’ approach seeks toexplain theserelations through four variables: changes
Luiz Marcelo Michelon Zardo   +2 more
doaj  

Economic Burden of Rheumatoid Arthritis in Low‐ and Middle‐Income Countries: Systematic Review and Meta‐Analysis

open access: yesArthritis Care &Research, EarlyView.
Objective The aim of this systematic review was to synthesize the economic impact of rheumatoid arthritis (RA) on households, health systems, and society in low‐ and middle‐income countries (LMICs). Methods Electronic databases such as PubMed, Web of Science, and CINAHL were searched using keywords related to RA and cost of illness.
Tadesse Gebrye   +6 more
wiley   +1 more source

Mechanically Deposited Wear‐Resistant Amorphous Zr55Cu30Al10Ni5 Coatings

open access: yesAdvanced Engineering Materials, EarlyView.
Mechanically deposited from glassy ribbons, the Zr55Cu30Al10Ni5 amorphous coating formed a hard, continuous layer on AISI 1010 steel, tripling substrate hardness, lowering friction, and reducing wear. Despite its rough surface, it showed friction and wear behavior comparable to the crystalline alloy, highlighting its strong potential as a durable ...
Tales Ferreira   +8 more
wiley   +1 more source

Uma aventura chamada Tupi: os primeiros anos da tv brasileira

open access: yesRumores, 2013
O Brasil, com a inauguração da TV Tupi em 1950, foi um dos cinco primeiros países do mundo a ter televisão e o primeiro da América latina. O invento, que se tornou uma paixão nacional, mesmo restrito inicialmente às classes mais altas, desde o começo ...
Flávio Lins
doaj   +1 more source

Nitride‐Reinforced Metal Matrix Nanocomposite Powders Production by Plasma‐Assisted Thermochemical Treatment of Intermetallic Powders

open access: yesAdvanced Engineering Materials, EarlyView.
This study proposes a new methodology for producing metal matrix nanocomposites in the solid state. The process involves the plasma‐assisted thermochemical treatment of metallic alloy powders. As a proof‐of‐concept, TiN nanoparticles are synthesized directly on the surface of FeTi intermetallic powder particles, enabling the development of the ...
Deivison Daros Paim   +4 more
wiley   +1 more source

Spatio-temporal analysis of leptospirosis in Eastern Amazon, State of Pará, Brazil

open access: yesRevista Brasileira de Epidemiologia
: Introduction: Brazil has registered more than 62,000 confirmed cases of leptospirosis between 2001 and 2017, with more than 2,000 cases confirmed in the State of Pará.
Rodrigo Arcoverde Cerveira   +6 more
doaj   +1 more source

AVALIAÇÃO INSTITUCIONAL: TRAJETÓRIA E DESAFIOS NA UNIVERSIDADE [PDF]

open access: yes, 2015
O Sistema Nacional de Avaliação da Educação Superior - SINAES no Brasil fez 10 anos em 2014. A duração do sistema significa que o processo de avaliação se consolidou e garante a inserção da atividade na rotina das Instituições de Ensino Superior no país.
BRASIL, WALTERLINA
core  

Bethe-Salpeter equation with cross-ladder kernel in Minkowski and Euclidean spaces [PDF]

open access: yes, 2006
Some results obtained by a new method for solving the Bethe-Salpeter equation are presented. The method is valid for any kernel given by irreducible Feynman graphs.
Amghar   +18 more
core   +5 more sources

Fabrication of Multifunctional FeSi Gyroid Lattice Composites via Additive Manufacturing and Polymer Infiltration

open access: yesAdvanced Engineering Materials, EarlyView.
A two‐step approach combining laser powder bed fusion of FeSi electrical steel with Bakelite infiltration enables the fabrication of multifunctional gyroid lattice composites. The resulting structures exhibit high strength, magnetic anisotropy, and complete polymer infiltration, demonstrating a simple and scalable route toward lightweight, mechanically
Angelo F. Andreoli   +9 more
wiley   +1 more source

Echinodorus australis (Alismataceae), a new synonym for Helanthium bolivianum

open access: yesBonplandia, 2019
Echinodorus australis Rataj, a species from southern Brazil and northern Argentina, is here synonymized under Helanthium bolivianum (Rusby) Lehtonen & Myllys.
Christian A. Zanotti, Adela M. Panizza
doaj   +1 more source

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