Results 81 to 90 of about 142,312 (246)
Resolving the Structural Duality of Graphene Grain Boundaries
Advanced Materials, EarlyView.Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo +11 more
wiley +1 more source
Radiation‐Resistant Aluminum Alloy for Space Missions in the Extreme Environment of the Solar System
Advanced Materials, EarlyView.A novel ultrafine‐grained aluminum crossover alloy exhibits unprecedented radiation resistance and mechanical stability under extreme irradiation doses up to 100 dpa. The exceptional resilience arises from thermodynamically stable T‐phase precipitates, enabling lightweight structural materials for next‐generation spacecraft and extraterrestrial ...
Patrick D. Willenshofer +9 more
wiley +1 more source
Case Reports in Women's Health, 2019 Background: Adnexal torsion requires a high degree of suspicion in women presenting with pelvic pain. Polycystic ovaries are an infrequent cause of ovarian torsion but should be considered in cases without adnexal masses.
Rachel E. Warwar, Grant E. Schmidt
doaj +1 more source
Diseño de un controlador basado en observador para un sistema de torsión [PDF]
, 2013 Este artículo presenta el diseño de un controlador basado en observador para un sistema de torsión. Se propone un esquema de un controlador dinámico continuo para regular una clase de sistemas mecánicos totalmente actuados con fricción seca.
Carvajal, Diego +1 more
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Conceptos biomecánicos de los clavos «en cerrojo» [PDF]
, 1996 Se pasa revista a las propiedades mecánicas comparativas de los diferentes montajes alcanzables con los distintos modelos y concepciones de clavos «en cerrojo*.
Fernández Fairen, Mariano
core +2 more sources
Adaptive Twisting Metamaterials
Advanced Materials, EarlyView.This work introduces torque‐controlled twisting metamaterials as a transformative platform for adaptive crashworthiness. By combining multiscale predictive modeling with experimental validation on additively manufactured gyroids, it demonstrates tunable stiffness, collapse stress, and energy absorption.
Mattia Utzeri +6 more
wiley +1 more source
Abelian group in a topos of sheaves: torsion and essential extensions
International Journal of Mathematics and Mathematical Sciences, 1989 We investigate the properties of torsion groups and their essential extensions in the category AbShL of Abellan groups in a topos of sheaves on a locale. We show that every torsion group is a direct sum of its p-primary components and for a torsion group
Kiran R. Bhutani
doaj +1 more source
Diseño y construcción de un dispositivo para medición de la variación de momento con respecto a un eje [PDF]
, 2015 El presente trabajo de grado ha sido realizado con la finalidad de explicar de forma didáctica los conceptos de Momento alrededor de un punto y Momento alrededor de un eje, los cuales en lo normal son complejos de comprender e interiorizar, para muchos ...
Chilito Franco, Jhon Fernando +1 more
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Resúmenes de artículos de revistas técnicas. [PDF]
, 1971 Resúmenes de artículos de revistas técnicas de la materia de industria textil.Peer ...
core +2 more sources
Advanced Materials, EarlyView.Heptazine‐assisted MR‐TADF emitters enable narrowband yellow emission with high efficiency at high luminance in solution‐processed OLEDs. In doped films, HAP‐3CzBN achieves a record‐fast kRISC of 1.19 × 106 s−1. The optimized HAP‐3CzBN devices deliver 15.5% EQEmax with negligible roll‐off at 1000 cd m−2, 11.2% at 10,000 cd m−2, and a benchmark 20.3 ...
Changfeng Si +5 more
wiley +1 more source