Results 61 to 70 of about 1,709,207 (373)

Consolidate Overview of Ribonucleic Acid Molecular Dynamics: From Molecular Movements to Material Innovations

open access: yesAdvanced Engineering Materials, EarlyView.
Molecular dynamics simulations are advancing the study of ribonucleic acid (RNA) and RNA‐conjugated molecules. These developments include improvements in force fields, long‐timescale dynamics, and coarse‐grained models, addressing limitations and refining methods.
Kanchan Yadav, Iksoo Jang, Jong Bum Lee
wiley   +1 more source

A Sub-Aperture-Based Calibration Algorithm for MIMO Antenna Arrays

open access: yesIEEE Open Journal of Antennas and Propagation
In order to ensure high-resolution angle estimation results, antenna apertures of radar sensors become large relative to the wavelength. To prevent high sidelobe levels, the number of antennas is constantly increased, generally through the employment of ...
Matthias Linder   +4 more
doaj   +1 more source

Microwave-mediated heat transport through a quantum dot

open access: yes, 2012
The thermoelectric effect in a quantum dot (QD) attached to two leads in the presence of microwave fields is studied by using the Keldysh nonequilibrium Green function technique.
Dubi Y   +4 more
core   +1 more source

Controlled microwave heating in modern organic synthesis.

open access: yesAngewandte Chemie, 2004
Although fire is now rarely used in synthetic chemistry, it was not until Robert Bunsen invented the burner in 1855 that the energy from this heat source could be applied to a reaction vessel in a focused manner. The Bunsen burner was later superseded by
C. Kappe
semanticscholar   +1 more source

An Examination of Aerosol Jet‐Printed Surface Roughness and its Impact on the Performance of High‐Frequency Electronics

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores aerosol jet‐printed (AJP) surface roughness, its effects on the performance of microwave electronics, and its process contributors. First, an electromagnetic model is vetted for AJP's unique roughness signature. Simulations are built which show process‐induced roughness is as significant as conductor resistivity in driving microwave
Christopher Areias, Alkim Akyurtlu
wiley   +1 more source

A Novel Rotation-Based Standardless Calibration and Characterization Technique for Free-Space Measurements of Dielectric Material

open access: yesIEEE Journal of Microwaves
This article presents a novel transmission-only calibration technique for free-space quasi-optical material characterization, based on rotating the sample around its axis to vary the angle of incidence under which the sample is illuminated.
Adrian Diepolder   +5 more
doaj   +1 more source

Giant microwave photoresistivity in a high-mobility quantum Hall system

open access: yes, 2011
We report the observation of a remarkably strong microwave photoresistivity effect in a high-mobility two-dimensional electron system subject to a weak magnetic field and low temperature.
A. T. Hatke   +5 more
core   +1 more source

Microwave Components with MEMS Switches [PDF]

open access: yes, 2000
RF MEMS switches with metal-metal contacts are being developed for microwave applications where broadband, high linearity performance is required. These switches provide less than 0.2 dB insertion loss through 40 GHz. This paper describes the integration
Allison, Robert C.   +10 more
core   +1 more source

Tribology of ZrC Coatings and Spherical Tips Acquired with Extraordinarily Stiff, Metal Atomic Force Microscopy Probes

open access: yesAdvanced Engineering Materials, EarlyView.
In this research, ZrC coatings are evaluated against various counterprobes at the microscale using novel super‐stiff atomic force microscopy cantilevers. The chemical composition of the coating is shown to be an important factor influencing coating hardness and Young's modulus, while surface roughness, counterprobe hardness, and surface energy are the ...
Piotr Jenczyk   +4 more
wiley   +1 more source

Microwave Vision Three-dimensional SAR Experimental System and Full-polarimetric Data Processing Method

open access: yesLeida xuebao
Three-Dimensional (3D) Synthetic Aperture Radar (SAR) holds great potential for applications in fields such as mapping and disaster management, making it an important research focus in SAR technology. To advance the application and development of 3D SAR,
Xiaolan QIU   +9 more
doaj   +1 more source

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