Results 51 to 60 of about 156,506 (292)

Comparaison des modèles numériques tridimensionnels de diffraction-radiation Comparison of Three-Dimentional Numerical Diffraction-Radiation Models

Oil & Gas Science and Technology, 2006
Le but de cet article est de présenter le bilan des études effectuées jusqu'à présent sur le problème de la diffraction-radiation. II fait suite au séminaire qui a eu lieu sur ce sujet en avril 1977 à Paris et qui a réuni les principaux chercheurs ...
Susbielles G., Berhault C.
doaj   +1 more source

Use of Dynamical Undulator Mechanism to Produce Short Wavelength Radiation in Volume FEL (VFEL)

, 2002
VFEL lasing in system with dynamical undulator is described. In this system radiation of long wavelength creates the undulator for lasing on shorter wavelength. Two diffraction gratings with different spatial periods form VFEL resonator. The grating with
Baryshevsky, Baryshevsky, Baryshevsky, K.G. Batrakov, Marshall, V.G. Baryshevsky   +5 more
core   +1 more source

Impact of Sustainable Binders Based on Lignin and Collagen on the Volume Stability and Mechanical Properties of MgO‐C Refractories with MgO‐C Recyclates

Advanced Engineering Materials, EarlyView.
Collagen hydrolysate is evaluated as a sustainable binder for MgO‐C refractories. Its thermally induced cross‐linking and gas release lead to expansion and cracking in large bricks, but tailored batches with lignin, recyclates, or fine graphite improve the gas release while thermal treatment and stability.
Till M. J. Stadtmüller, Florian Kerber, Kirsten Moritz, Steffen Dudczig, Konstantin Kraushaar, Thomas Schemmel, Jana Hubálková, Patrick Gehre, Christos G. Aneziris   +8 more
wiley   +1 more source

Boundary Value Problems for the Helmholtz Equation for a Half-plane with a Lipschitz Inclusion [PDF]

, 2018
This paper considers to the problems of diffraction of electromagnetic waves on a half-plane, which has a finite inclusion in the form of a Lipschitz curve. The diffraction problem formulated as boundary value problem for Helmholtz equations and boundary
Lipachev, E.
core   +1 more source

Solving the complete pseudo-impulsive radiation and diffraction problem using a spectral element method [PDF]

Computer Methods in Applied Mechanics and Engineering
21 pages, 11 ...
Jens Visbech, Allan P. Engsig-Karup, Harry B. Bingham   +2 more
openaire   +3 more sources

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source

Method to enhance the resolution of x-ray coherent diffraction imaging for non-crystalline bio-samples

New Journal of Physics, 2014
To circumvent the problem of radiation damage when using an x-ray coherent diffraction imaging experiment to resolve the structure of biological samples, we propose a method to add objects made of heavy atoms with the bio-samples or we load the samples ...
Ti-Yen Lan, Po-Nan Li, Ting-Kuo Lee
doaj   +1 more source

Protein crystal structure from non-oriented, single-axis sparse X-ray data

IUCrJ, 2016
X-ray free-electron lasers (XFELs) have inspired the development of serial femtosecond crystallography (SFX) as a method to solve the structure of proteins.
Jennifer L. Wierman, Ti-Yen Lan, Mark W. Tate, Hugh T. Philipp, Veit Elser, Sol M. Gruner   +5 more
doaj   +1 more source

Solving the spectral gap problem with a four-mirror bow-tie cavity in waveguide free-electron laser oscillators

Scientific Reports, 2023
The generation of intense coherent radiation pulses in the far-infrared and terahertz regimes is of considerable interest to the free-electron laser (FEL) radiation user community.
Mengqi Xia, Yuanfang Xu, Zhouyu Zhao, Heting Li   +3 more
doaj   +1 more source

Semi-Analytical Methods for Different Problems of Diffraction-Radiation by Vertical Circular Cylinders [PDF]

International Journal of Ocean System Engineering, 2012
As in the other fields of mechanics, analytical methods represent an important analysis tool in marine hydrodynamics. The analytical approach is interesting for different reasons : it gives reference results for numerical codes verification, it gives physical insight into some complicated problems, it can be used as a simplified predesign tool, etc ...
openaire   +1 more source