Results 61 to 70 of about 18,723 (229)

A Dislocation Perspective on Strength and Toughness in Ceramics

open access: yesAdvanced Engineering Materials, EarlyView.
Dislocations in ceramics enjoy a long but yet under‐appreciated history. The three research waves for dislocations in ceramics highlight the topic evolution over the last 90 years. This review focuses on the impact of dislocation on strength and toughness in ceramics.
Xufei Fang
wiley   +1 more source

Reduction Of Metal Artefacts In Ct Data With Submicron Resolution Using Dual-Target Ct

open access: yes
The article deals with the possibility of the metal artefact reduction in computed tomography (CT) data with submicron resolution using dual-target CT. The sample is scanned twice at different acquisition parameters, at two different energy spectra. Dual-
Šalplachta, Jiří, Víteček, Jakub
core   +1 more source

Iterative Beam Hardening Correction for Multi-Material Objects.

open access: yes, 2015
In this paper, we propose an iterative beam hardening correction method that is applicable for the case with multiple materials. By assuming that the materials composing scanned object are known and that they are distinguishable by their linear ...
Yunsong Zhao   +3 more
core   +1 more source

Triple Junctions as Dislocation‐Like Defects: The Role of Grain Boundary Crystallography Revealed by Experiment and Atomistic Simulation

open access: yesAdvanced Engineering Materials, EarlyView.
Grain boundary triple junctions are an essential ingredient of the microstructure of polycrystalline materials. In this study, a triple junction is observed using atomic‐resolution scanning transmission electron microscopy and characterized. Computer simulations reveal that the junction has a dislocation character that is determined by the joining ...
Tobias Brink   +4 more
wiley   +1 more source

Low Cost Compact Electronically Scanned Millimeter Wave Lens And Method

open access: yes, 1997
A low cost, compact, electronically scanned millimeter wave (MMW) lens enables the projection of a highly directional beam of Ka band millimeter wave (MMW) electromagnetic energy, while eliminating the need for mechanical movement of the lens.

core  

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

open access: yesAdvanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal   +3 more
wiley   +1 more source

Computer models for the design and optimization of a linear slot scanning mammography system

open access: yes, 2008
Includes abstract. Includes bibliographical references (p. 143-151)
Hussein, Khalid Ibrahim
core  

Evaluation of quality of images reconstructed from the data acquired in narrow (15%) and standard (20%) symmetrical energy window in conjunction with physical filter in tc-99m spect

open access: yes, 2022
Single Photon Emission Computed Tomography (SPECT) is a very useful medical imaging modality for detecting various diseases. However, relative to other medical imaging specialties, such as X-ray and Magnetic Resonance Imaging it has some limitations in ...
Zakaria, Nurul Nabilah   +2 more
core  

Advanced Electron Microscopy and Microcomputed Tomography Analysis of Single‐Crystal Ni‐Base Superalloys After Short‐Term Multiaxial Creep

open access: yesAdvanced Engineering Materials, EarlyView.
This work studies the anisotropic behavior of circular notched tensile specimens of Ni‐base superalloy single crystals during high‐temperature tensile creep along [001], [110], and [111]. Correlative scale‐bridging imaging of specimens reveals early rupture along [110] because 1) plastic deformation proceeds faster at notch center; 2) more (brittle ...
Leonardo Agudo Jácome   +6 more
wiley   +1 more source

Filtered back-projection reconstruction for attenuation proton CT along most likely paths

open access: yes, 2016
International audienceThis work investigates the attenuation of a proton beam to reconstruct the map of the linear attenuation coefficient of a material which is mainly caused by the inelastic interactions of protons with matter.
Quinones, C.T., Létang, J. M., Rit, S.
core   +1 more source

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