Results 111 to 120 of about 123,541 (306)

GUERILLA MARKETING: CONTROVERSIAL ISSUES [PDF]

open access: yes, 2005
Azevedo-Perdicoúlis, Teresa Paula   +1 more
core   +2 more sources

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

open access: yesAdvanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb   +6 more
wiley   +1 more source

Chiapas en la seguridad nacional de México [PDF]

open access: yes, 1994
1 archivo PDF (10 páginas)Las guerras centroamericanas se arreglaron de manera aparentemente paradójica; los sandinistas después de diez años de guerra de agresión imperialista fueron derrotados en las urnas, la guerrilla salvadoreña no ganó la guerra ni
Piñeyro Piñeyro, José Luis
core  

Affecting the Properties of Copper–Graphene Electroconductive Composite by Severe Plastic Deformation

open access: yesAdvanced Engineering Materials, EarlyView.
Copper‐based composites enhanced with carbon feature convenient mechanical properties and favorable electric conductivity. Processing via deformation and thermomechanical treatments can introduce advantageous microstructures further enhancing their performance. Herein, copper–graphene powder‐based composites are directly consolidated via rotary swaging
Radim Kocich   +3 more
wiley   +1 more source

Las mujeres y la guerrilla: ¿un espacio para las políticas de género?

open access: yesAraucaria, 2014
El presente artículo examina la naturaleza de la guerra de guerrillas desde una perspectiva de género y con una especial consideración de su impacto en los diversos escenarios iberoamericanos en los que se libró o se libran luchas armadas con la ...
Carolina Jiménez Sánchez
doaj  

Robust Spot Melting by 3D Spot Arrangements in Electron Beam Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
This work proposes an approach to replace separately melted contours for spot melting in electron beam powder fusion. Adapting the spot arrangements close to the contour combined with stacking yields a comparable surface quality without the inherent challenges of separate contours, as demonstrated, by electron optical images and roughness measurements.
Tobias Kupfer   +4 more
wiley   +1 more source

Is Violence Against Union Members in Colombia Systematic and Targeted? [PDF]

open access: yes
Violence against union members in Colombia has been at the center of a debate for several years now. Union leaders and NGOs in Colombia and abroad continuously argue that free trade agreements with Colombia should be blocked based on the failure of the ...
Daniel Mejía, María José Uribe
core  

Multimodal Data‐Driven Microstructure Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang   +4 more
wiley   +1 more source

Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites

open access: yesAdvanced Engineering Materials, EarlyView.
Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter   +9 more
wiley   +1 more source

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