Results 41 to 50 of about 522,228 (199)

Alcance constitucional del conflicto entre las comunidades indígenas y las fuerzas militares en Colombia

open access: yesRevista Jurídica Mario Alario D'filippo, 2014
El presente artículo pretende aproximar al lector al debate sobre los derechos fundamentales y las tensiones constitucionales del conflicto entre las comunidades indígenas de Colombia y las fuerzas armadas de este país.
Delia Constanza Bechara Llanos
doaj   +3 more sources

Remuneration of Ancillary Services from Microgrids: A Cost Variation-Driven Methodology

open access: yesEnergies
Microgrids (MGs) have emerged as pivotal players in the energy transition by enabling the efficient integration of distributed energy resources and the provision of ancillary services to the power system.
Yeferson Lopez Alzate   +2 more
doaj   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar   +6 more
wiley   +1 more source

The Impact of High‐Productivity Processing on the Fatigue Failure of an Additive Manufactured Superalloy HAYNES 282

open access: yesAdvanced Engineering Materials, EarlyView.
The low cycle fatigue life of additive manufactured HAYNES® 282® superalloy was investigated for conventional and high‐productivity processing: samples of the former lasted 1400–1700 cycles, while samples of the latter failed at ~ 1200 cycles, at 760 °C and 1% strain.
Abdul Shaafi Shaikh   +3 more
wiley   +1 more source

Mechanical properties of rosemary (Rosmarinus officinalis L.) stalks

open access: yesAgronomía Colombiana, 2013
Rosemary is an aromatic herb exported by Colombia. It is a perennial aromatic bush that can grow up to 2 m high. Its leaves are narrow, thin, shiny and strongly scented; the stems are woody and resinous, branched and slightly bitter.
César Andrés Arévalo   +2 more
doaj  

Laser Powder Bed Fusion of Copper–Tungsten Composites for Heat Sink Applications in High‐Power Electronics

open access: yesAdvanced Engineering Materials, EarlyView.
This article demonstrates the successful qualification of a copper–tungsten composite for laser powder bed fusion. The resulting components exhibited high density, high thermal conductivity, and reduced thermal expansion. Heat sinks with complex geometries were successfully manufactured, clearly showcasing the material's potential for additive ...
Simon Rauh   +6 more
wiley   +1 more source

11-S: The Overflows of The New Global Empire

open access: yesRevista de Culturas y Literaturas Comparadas, 2015
Undoubtedly, 9/11 represents a moment of inflection in the history of the United States. With the exception of the invasion of the air space back in time in faraway Pearl Harbour, the United States had never been the object of attacks in its territory. 9/
Miriam Carballo
doaj  

Textura y Estrés: las aplicaciones olvidadas de la Difracción de Rayos X en materiales

open access: yesRevista de Química, 2020
La cristalografía de rayos X resulta una técnica analítica fundamental para el estudio exhaustivo de la estructura cristalina de los materiales. A pesar de su enorme relevancia tanto a nivel científico como industrial, su cobertura respecto a análisis ...
Aitor Larrañaga Varga
doaj  

A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions

open access: yesAdvanced Engineering Materials, EarlyView.
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice   +2 more
wiley   +1 more source

Interactions between Molten High‐Silicon Electrical Steels and Carbon‐Bonded MgO Refractories Based on Recyclates

open access: yesAdvanced Engineering Materials, EarlyView.
This study examines how several molten high‐silicon electrical steels interact with both conventional and recycled MgO–C refractories. For this, various immersion experiments are conducted. In addition to infiltration, a number of mechanisms are identified and explained that control the corrosion of the refractory material.
Lukas Neubert   +7 more
wiley   +1 more source

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