Results 61 to 70 of about 144,163 (329)

$\mathcal{PT}$ phase control in circular multicore fibers

, 2016
We consider light dynamics in a circular multicore fiber with balanced gain and loss core distribution, and show that transition from unbroken to broken $\mathcal{PT}$ phases can be conveniently controlled by geometric twist of the fiber.
Longhi, Stefano
core   +1 more source

Human Eye Optics within a Non-Euclidian Geometrical Approach and Some Implications in Vision Prosthetics Design [PDF]

, 2021
Liviu Bîlteanu, Ovidiu Ionuț Geicu, Loredana Stanca, Aurelia Magdalena Pisoschi, Florea Serban, Andreea Iren Șerban, Valentin Calu   +6 more
openalex   +1 more source

The Impact of High‐Productivity Processing on the Fatigue Failure of an Additive Manufactured Superalloy HAYNES 282

Advanced Engineering Materials, EarlyView.
The low cycle fatigue life of additive manufactured HAYNES® 282® superalloy was investigated for conventional and high‐productivity processing: samples of the former lasted 1400–1700 cycles, while samples of the latter failed at ~ 1200 cycles, at 760 °C and 1% strain.
Abdul Shaafi Shaikh, Ahmed Fardan, Tatiana Mishurova, Eduard Hryha   +3 more
wiley   +1 more source

The two reflector design problem for forming a flat wavefront from a point source as an optimal mass transfer problem [PDF]

Компьютерная оптика, 2019
The article deals with a problem of calculating two reflecting surfaces that form a given irradiance distribution with a flat wavefront, provided that a point source of light is used. A notion of a weak solution for the said problem is formulated and the
Albert Mingazov, Leonid Doskolovich, Dmitry Bykov, Nikolay Kazanskiy   +3 more
doaj   +1 more source

Laser Powder Bed Fusion of Copper–Tungsten Composites for Heat Sink Applications in High‐Power Electronics

Advanced Engineering Materials, EarlyView.
This article demonstrates the successful qualification of a copper–tungsten composite for laser powder bed fusion. The resulting components exhibited high density, high thermal conductivity, and reduced thermal expansion. Heat sinks with complex geometries were successfully manufactured, clearly showcasing the material's potential for additive ...
Simon Rauh, Shashank Deepak Prabhu, Jannik Huber, Lioba Fischer, Gerhard Wolf, Nico Hempel, Peter Mayr   +6 more
wiley   +1 more source

Design of Compact Liquid Crystal on Silicon Projection Optics Utilizing a Common Freeform Optical Path for Augmented Reality Displays

Advanced Intelligent Systems
Waveguides are a crucial optical solution for see‐through near‐eye displays. For waveguide‐based systems, lightweight and compact projection optics are essential.
Ximeng Wang, Dewen Cheng, Yuefan Shan, Da Wang, Tong Yang, Yongtian Wang   +5 more
doaj   +1 more source

Analytic Physical Optics Solution to Bistatic 3D Scattering From Separated Dihedral

IEEE Access, 2018
Constructing the mapping between the geometric object and its corresponding 3D scattering response is a fundamental but challenging task in the domain of electromagnetic scattering, which is crucial for radar target recognition and the 3D structure ...
Xinkui Wang, Libing Jiang, Zibo Zhou, Zhuang Wang   +3 more
doaj   +1 more source

Quantum Yang-Mills gravity in flat space-time and effective curved space-time for motions of classical objects

, 2011
Yang-Mills gravity with translational gauge group T(4) in flat space-time implies a simple self-coupling of gravitons and a truly conserved energy-momentum tensor.
A.A. Logunov, B.S. DeWitt, F.S. Fradkin, J.P. Hsu, J.P. Hsu, J.P. Hsu, J.P. Hsu, J.P. Hsu, J.P. Hsu, J.P. Hsu, K. Hayashi, L. Hsu, M. Fierz, M. Fierz, M.J. Valtonen, Ning Wu, R. Utiyama, S. Mandelstam, T.W.B. Kibble, V.C. de Andrade, Y.M. Cho   +20 more
core   +1 more source

Interactions between Molten High‐Silicon Electrical Steels and Carbon‐Bonded MgO Refractories Based on Recyclates

Advanced Engineering Materials, EarlyView.
This study examines how several molten high‐silicon electrical steels interact with both conventional and recycled MgO–C refractories. For this, various immersion experiments are conducted. In addition to infiltration, a number of mechanisms are identified and explained that control the corrosion of the refractory material.
Lukas Neubert, Matheus Roberto Bellé, Anton Yehorov, Anhelina Mospan, Till M. J. Stadtmüller, Seetharaman Sridhar, Christos G. Aneziris, Olena Volkova   +7 more
wiley   +1 more source

On the symplectic structures arising in Optics

, 1996
Geometric optics is analysed using the techniques of Presymplectic Geometry. We obtain the symplectic structure of the space of light rays in a medium of a non constant refractive index by reduction from a presymplectic structure, and using adapted ...
Abraham, Bamberg, Cariñena, Cariñena, Cariñena, Castaños, Crampin, Dragt, Dragt, Dragt, Dragt, Dragt, Guillemin, Holm, Holm, Holm, Marsden, Mondragón, Saletan, Wolf, Wolf, Wolf   +21 more
core   +2 more sources