Results 101 to 110 of about 98,753 (267)
Development of double nearfield acoustic holography method (Basic experimental results)
Nihon Kikai Gakkai ronbunshu, 2019 There are several types of sound localization methods. In middle frequency around 1kHz, these methods are effective to detect the sound source location.
Masao NAGAMATSU
doaj +1 more source
Modern Physics Letters A, 2008 We perform the first study of baryons in holographic QCD with [Formula: see text] multi-D-brane system in type IIA superstring theory. The baryon is described as a chiral soliton solution in the four-dimensional meson effective action derived from holographic QCD.
Toru Kojo, Kanabu Nawa, Hideo Suganuma
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Advanced Science, EarlyView.The expansive design space of advanced metasurfaces, particularly those with multiple degrees of freedom (MDOF), renders traditional design methods less effective. A physics‐driven intelligent design is proposed for MDOF metasurfaces, which integrates physical knowledge into neural networks, enhancing interpretability and computational efficiency. This
Jian Lin Su +10 more
wiley +1 more source
Feed particle size evaluation: conventional approach versus digital holography based image analysis
Italian Journal of Animal Science, 2010 The aim of this study was to evaluate the application of image analysis approach based on digital holography in defining particle size in comparison with the sieve shaker method (sieving method) as reference method.
Vittorio Dell’Orto +7 more
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Aspects of Ultra-Relativistic Field Theories via Flat-space Holography
, 2017 Recently it was proposed that asymptotically flat spacetimes have a holographic dual which is an ultra-relativistic conformal field theory. In this paper, we obtain the conformal anomaly for such a theory via the flat-space holography technique ...
Fareghbal, Reza +2 more
core +2 more sources
Current Progress and Challenges of Electromagnetic Wave Absorbing Materials at High Temperature
Advanced Science, EarlyView.This review explains three dielectric loss mechanisms of electromagnetic wave absorbing materials under high temperatures and the high temperature testing technology is explained. The research progress of carbon‐based, ceramic‐based and metamaterial‐based electromagnetic wave absorbers is analyzed.
Zhixiao Wang +5 more
wiley +1 more source
Journal of High Energy PhysicsAbstract We show how to encode the radiative degrees of freedom in 4-dimensional asymptotically AdS spacetimes, using the boundary Cotton and stress tensors. Background radiation leads to a reduction of the asymptotic symmetry group, in contrast to asymptotically flat spacetimes, where a non-vanishing news tensor does not restrict ...
Luca Ciambelli +2 more
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Advanced Science, EarlyView.A single‐cell metasurface is designed to multiplex holographic images across both spin and wavelength channels using a single‐phase map. By employing inverse design and automatic differentiation, the metasurface achieves 36 channel multiplexing across the visible to near‐infrared spectrum.
Cherry Park, Youngsun Jeon, Junsuk Rho
wiley +1 more source
Facts and Fictions about Anti deSitter Spacetimes with Local Qantum Matter
, 2001 It is natural to analyse the AdS$_{d+1}$-CQFT$_{d}$ correspondence in the context of the conformal- compactification and covering formalism. In this way one obtains additional inside about Rehren's rigorous algebraic holography in connection with the ...
Schroer, Bert
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Journal of High Energy PhysicsAbstract We give an interpretation of holography in the form of the AdS/CFT correspondence in terms of homotopy algebras. A field theory such as a bulk gravity theory can be viewed as a homotopy Lie or L∞ algebra. We extend this dictionary to theories defined on manifolds with a boundary, including the conformal boundary of AdS ...
Chiaffrino, Christoph +2 more
openaire +3 more sources