Results 21 to 30 of about 879,303 (290)

Geometric Optics Photo

open access: yes, 2002
Displays the equipment necessary for the "Geometric Optics ...
Herman, Russell
core   +2 more sources

Geometric Optics and Boundary Layers for Nonlinear Schrödinger Equations [PDF]

open access: yes, 2009
International audienceWe justify supercritical geometric optics in small time for the defocusing semiclassical Nonlinear Schrodinger Equation for a large class of non-necessarily homogeneous nonlinearities.
Rousset, Frédéric   +2 more
core   +1 more source

Jacobians of Light Scattering Properties Based on the Improved Geometric Optics Method (IGOM)

open access: yesRemote Sensing
The partial derivatives or Jacobians of single-scattering properties (SSPs) with respect to microphysical properties are essential in variational remote sensing.
Dongbin Liang, Bingqiang Sun
doaj   +1 more source

Scattering of ECRF waves by edge density blobs and fluctuations in tokamak plasmas

open access: yesEPJ Web of Conferences, 2012
There are two basic approaches to studying the effects of density blobs and edge fluctuations on the coupling of electron cyclotron (EC) radio frequency waves to the core of tokamak plasmas.
Kominis Yannis   +2 more
doaj   +1 more source

Analysis of KVN 21m Radio Antenna Optics using Ray-Tracing Method [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2009
In this work, we calculate drop in antenna gain, aperture phase distribution, and antenna pointing shift of KVN(Korean VLBI Network) 21m shaped Cassegrain antenna due to misalignments of antenna optics using ray-tracing method.
Jae-Han Bae, Do-Young Byun
doaj   +1 more source

Validity of nonlinear geometric optics for entropy solutions of multidimensional scalar conservation laws [PDF]

open access: yes, 2006
Nonlinear geometric optics with various frequencies for entropy solutions only in L∞ of multidimensional scalar conservation laws is analyzed. A new approach to validate nonlinear geometric optics is developed via entropy dissipation through scaling ...
Chen, G-Q   +5 more
core   +1 more source

Ray and wave dynamics in a static FRW spacetime with conical singularity

open access: yesPhysics Letters B
In this paper, we investigate a (1+3)-dimensional static Friedmann-Robertson-Walker (FRW) space-time, pierced by a cosmic string. Our analysis begins with a detail study of the geodesic motion of photon rays in this curved background, focusing on the ...
Faizuddin Ahmed, Abdelmalek Bouzenada
doaj   +1 more source

Spin optics for gravitational waves [PDF]

open access: yes, 2022
We present the geometric optics expansion for circularly polarized gravitational waves on a curved spacetime background, to subleading order. We call spin optics to the subleading order geometric optics expansion, which involves modifying the standard ...
Pravin Kumar Dahal, Dahal, Pravin Kumar
core   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav   +2 more
wiley   +1 more source

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