Results 41 to 50 of about 10,903 (164)

ML-Driven Decision Support for Dynamic Modeling of Calcareous Sands

open access: yesMachine Learning and Knowledge Extraction
Dynamic characterization of calcareous (carbonate) sands is essential for performance-based design of offshore foundations, coastal reclamation, and marine infrastructure in tropical and subtropical regions.
Abdalla Y. Almarzooqi   +3 more
doaj   +1 more source

Shear moduli of metal specimens using resonant column tests

open access: yes, 2020
The shear moduli of cylindrical metal specimens were determined by performing resonant column tests in a torsional mode of vibration. The tests were performed on four different metals, namely (i) aluminum, (ii) brass, (iii) copper, and (iv) mild steel ...
Kumar, Jyant   +3 more
core   +1 more source

Dipole Resonant Modes of an Ionized Gas Column

open access: yes, 1954
It is shown by a quasi-static treatment there is not one but a multiplicity of plasma resonant modes which will emit dipole radiation in a cylindrical column of ionized gas with a radially symmetrical but non-uniform electron density.
REB Makinson, DM Slade
core   +1 more source

Design and experimental research on model soils used for shaking table tests of superstructure-soil-tunnel interaction system

open access: yesYantu gongcheng xuebao, 2020
In order to match the similitude ratio of acceleration of a superstructure-soil-tunnel interaction system and truly restore its dynamic response under earthquake action, a kind of model soil composed of sawdust, river sand, silty clay and water is ...
XIE Jun 1, 2, BAO Shu-xian 2, HU Ying-fei 2, NI Ya-jing 2, LI Yan-tao 1
doaj   +1 more source

High-throughput piezoelectric droplet dispenser driven by ultra-low voltage

open access: yesAIP Advances, 2023
Efficient and facile generation of tiny droplets is critical to many cutting-edge applications, such as flexible electronic skin, customized circuits, and micro-electro-mechanical systems.
Dege Li   +8 more
doaj   +1 more source

Flexural excitation in a standard torsional-resonant column device

open access: yes, 1998
The excitation of specimens in multiple modes enhances the characterization of granular materials. The purpose of this paper is to present the equipment modification and test procedure and data reduction for flexural excitation in a standard torsional ...
Najwa Yassir   +2 more
core   +1 more source

Evaluation of the damping ratio of compacted sodium and calcium bentonites in unsaturated conditions

open access: yesSoils and Foundations
Bentonites are going to be part of the Engineered Barrier System (EBS) in deep geological disposal facilities for the safe disposal of spent nuclear fuel.
X. Pintado   +10 more
doaj   +1 more source

Evaluation of the Shear Modulus Degradation by a Modified Hyperbolic Function for Unconventional Geomaterials

open access: yesGeosciences
The characterisation of shear modulus degradation is essential for understanding the dynamic response of geomaterials. This article presents a modified hyperbolic model that evaluates the shear modulus for various angular strains and effective confining ...
Hernán Patiño   +2 more
doaj   +1 more source

Using Nonionic Surfactants for Production of Semiconductor-type Carbon Nanotubes by Gel-based Affinity Chromatography

open access: yesNanomaterials and Nanotechnology, 2014
Single-wall carbon nanotubes (SWCNTs) have remarkable properties based on their electronic properties, i.e., metallic or semiconducting types, but as-grown SWCNTs contain a mixture of both types.
Varun Shenoy Gangoli   +7 more
doaj   +1 more source

Calibration exercise of a Hardin-type resonant column

open access: yes, 2018
This technical note presents the calibration exercise of a Hardin-type resonant column of fixed–partly fixed ends, which is capable of exerting dynamic torsional vibration on the specimen.
H. Li, H. He, K. Senetakis
core   +1 more source

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