Results 51 to 60 of about 689,445 (290)

Impact of conformation and intramolecular interactions on vibrational circular dichroism spectra identified with machine learning

open access: yesCommunications Chemistry, 2023
Vibrational Circular Dichroism (VCD) spectra often differ strongly from one conformer to another, even within the same absolute configuration of a molecule. Simulated molecular VCD spectra typically require expensive quantum chemical calculations for all
Tom Vermeyen   +3 more
doaj   +1 more source

Ultra Fast Switching of DFLC Based Dynamic Metasurfaces

open access: yesFrontiers in Physics, 2022
Dielectric metasurfaces give rise to very interesting optical and photonic properties such as Huygens lens, absolute transmission and absorption, directional scattering, etc.
P. A. Sakhare, Jayasri Dontabhaktuni
doaj   +1 more source

Laser Metal Deposited Ti4822 Hollow Pipe: Experimental and Computational Modelling Study

open access: yesAdvanced Engineering Materials, EarlyView.
Laser metal deposition (LMD) of a crack‐free built Ti4822 alloys is challenging. This article reports outstanding characteristics of a hollow pipe that is built with LMD technology when a predicted, nontransformation substrate temperature of 800 °C is used.
Sadiq A. Raji   +5 more
wiley   +1 more source

Perturbations of the local gravity field due to mass distribution on precise measuring instruments: a numerical method applied to a cold atom gravimeter

open access: yes, 2011
We present a numerical method, based on a FEM simulation, for the determination of the gravitational field generated by massive objects, whatever geometry and space mass density they have.
  +19 more
core   +2 more sources

X‐Ray Tomography Analysis of Damage Mechanisms in Metal Matrix Syntactic Foams During Compression

open access: yesAdvanced Engineering Materials, EarlyView.
In situ synchrotron X‐ray tomography is used to investigate the internal damage mechanisms of AlSi12 metal matrix syntactic foam with ceramic hollow spheres during compressive loading. It is concluded that a homogeneous distribution of the second‐phase filler material results in a sequential collapse in a localized region; this leads to controlled and ...
Indrajeet Tambe   +8 more
wiley   +1 more source

Geometry Measurement of Core Baffle of VVER-1000 Type Reactors of NPP Temelín

open access: yese-Journal of Nondestructive Testing, 2023
The degradation mechanism of radiation swelling causes increase of failures in the crystal lattice of the metal, which in consequence leads to an increase in the volume of the material and can and does result in a change in the geometry of the mentioned
Peter Vlcek, Miroslav žamboch
doaj   +1 more source

An Inkjet‐Printed Platinum‐Based Temperature Sensing Element on Polyimide Substrates

open access: yesAdvanced Engineering Materials, EarlyView.
An inkjet‐printed, meander‐structured, nanoparticle platinum‐based resistive temperature sensors on polyimide substrates are demonstrated as proof‐of‐concept. Optimized sintering at 250°C enables stable conductive structures. The Pt100‐ and Pt1000‐type sensors exhibit linear resistance–temperature characteristics with stable TCR in the 20°C–80°C range,
Shawon Alam   +6 more
wiley   +1 more source

Classification of general absolute geometries with Lambert-Saccheri quadrangles

open access: yesLe Matematiche, 2006
Without claiming any kind of continuity we show that an absolute geometry has either a singular, a hyperbolic or an elliptic congruence,
Helmut Karzel, Mario Marchi
doaj  

SPECTROSCOPIC STUDY OF THE CHARGE TRANSFER COMPLEXES FOR SOME DYES [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2012
This research was included the spectrophotometric study of charge transfer complexes of Lawson dye ( as acceptor ) with nine compounds ( as donors ) at room temperature 255 c by using absolute ethanol as solvent .
ABED AL-HAKIM DAHAM, SABRI M. HUSSEN
doaj   +1 more source

'Hexagon-type' photonic crystal slabs based on SOI [PDF]

open access: yes, 2002
In this paper we discuss the design of a novel category of photonic crystal slabs (PCS) and as an example, we consider structures based on SOI wafers. Fabrication issues related to lithographic accuracy are addressed, too.
Bostan, C.G., Ridder, R.M. de
core   +1 more source

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