نتایج جستجو برای: holographic

تعداد نتایج: 15158  

2016
Alexis D.J. Makin Damien Wright Giulia Rampone Letizia Palumbo Martin Guest Rhiannon Sheehan Helen Cleaver Marco Bertamini

A traditional line of work starting with the Gestalt school has shown that patterns vary in strength and salience; a difference in "Perceptual goodness." The Holographic weight of evidence model quantifies goodness of visual regularities. The key formula states that W = E/N, where E is number of holographic identities in a pattern and N is number of elements. We tested whether W predicts the am...

2000
HOLOGRAPHIC READ

We describe the three-dimensional holographic optical disc system for application as read-only memory. Several systems design issues are discussed including imaging optics, storage density, readout rate, and the alignment servo system. We demonstrate 40 bits=lm surface density and pixel-matched holographic data readout from a 12 cm disc spinning at 600 RPM.

Journal: :Optics letters 2004
Martin Centurion Ye Pu Zhiwen Liu Demetri Psaltis Theodor W Hänsch

We report on a holographic probing technique that allows for measurement of free-electron distribution with fine spatial detail. Plasma is generated by focusing a femtosecond pulse in air. We also demonstrate the capability of the holographic technique of capturing the time evolution of the plasma-generation process.

2005
Diego Pavón Winfried Zimdahl

We review the notion of holographic dark energy and assess its significance in the light of the well documented cosmic acceleration at the present time. We next propose a model of holographic dark energy in which the infrared cutoff is set by the Hubble scale. The model accounts for the aforesaid acceleration and, by construction, is free of the cosmic coincidence problem.

2006
Andreas Aste

I comment on Ulvi Yurtsever’s result, which states that the entropy of a truncated bosonic Fock space is given by a holographic bound when the energy of the Fock states is constrained gravitationally. The derivation given in Yurtsever’s paper contains an subtle mistake, which invalidates the result. A more restrictive, non-holographic entropy bound is derived. PACS numbers: 04.70.-s, 03.67.-a

Journal: :CoRR 2014
Ryuhei Mori

—Recently, a general tool called a holographic transformation , which transforms an expression of the partition function to another form, has been used for polynomial-time algorithms and for improvement and understanding of the belief propagation. In this work, the holographic transformation is generalized to quantum factor graphs.

Journal: :Optics express 2014
Eunkyong Moon Myeongjae Kim Jinyoung Roh Hwi Kim Joonku Hahn

A compact head-mounted holographic three-dimensional display with an RGB light-emitting diode (LED) light source is developed. Issues regarding full-color holographic image design and the quality associated with the use of an LED light source are investigated. The accommodation effect and background noise in the proposed system are discussed based on experimental observation.

2009
Alexander Heifetz John T. Shen M. S. Shahriar

We discuss a simple beam interference approximation method for deriving the angular selectivity of diffraction in weakly modulated volume holographic gratings. The results obtained using the multiple beam interference model agree qualitatively with the results obtained from a physical optics treatment of the coupled-wave theory for volume holographic gratings. © 2009 American Association of Phy...

Journal: :Optics letters 2008
Yuan Luo Paul J Gelsinger-Austin Jonathan M Watson George Barbastathis Jennifer K Barton Raymond K Kostuk

A three-dimensional imaging system incorporating multiplexed holographic gratings to visualize fluorescence tissue structures is presented. Holographic gratings formed in volume recording materials such as a phenanthrenquinone poly(methyl methacrylate) photopolymer have narrowband angular and spectral transmittance filtering properties that enable obtaining spatial-spectral information within a...

2009
A. Krikun

We discuss the holographic derivation of the magnetic susceptibility of the quark condensate. It is found that the susceptibility emerges upon the account of the ChernSimons term in the holographic action. We demonstrate that Vainshtein’s relation is not exact in the hard wall dual model but is fulfilled with high accuracy. Some comments concerning the spectral density of the Dirac operator are...

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