optical disc

Definitions

  • WordNet 3.6
    • n optical disc a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface
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Usage

In literature:

Snell gives an instance in which a piece of steel was imbedded close to the optic disc with retention of sight.
"Anomalies and Curiosities of Medicine" by George M. Gould
The optic disc becomes deeply cupped and the tissues of the optic disc and optic nerve extremely atrophied.
"Glaucoma" by Various
Both optic discs are oedematous and swollen.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition." by Alexander Miles
The optic disc appeared somewhat cloudy, with very evident venous pulsation.
"Neuralgia and the Diseases that Resemble it" by Francis E. Anstie
The veins, which are somewhat larger and deeper colored, usually pierce the disc of the optic nerve in two trunks.
"The Catholic World. Volume II; Numbers 7, 8, 9, 10, 11, 12." by E. Rameur
The optic discs are generally pale in both infants and in adults, with occasional signs of neuredema.
"Scurvy Past and Present" by Alfred Fabian Hess
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In news:

V International Trade Commission, 1 the en banc US Court of Appeals for the Federal Circuit addressed whether certain licensing practices related to a patent pool involving optical disc-related patents constituted patent misuse.
Software has lots of extras (like optical disc formatting and music CD creation).
New technology utilizes proven GEN 3 electronics, cabling and diagnostic software, and adds new optical sensing technology to monitor air disc pushrod stroke and caliper lever arm movement.
Samsung SE-218BB Ultrathin Optical Disc Drive .
For completely automatic burn, print, laminate operation, Accent attaches to Primera's Composer XL, ComposerPro or ComposerMax optical disc duplicators.
Diagnosis and Management of Optic Disc Elevation.
Samsung SE-218BB Ultrathin Optical Disc Drive.
The technology also has implications for Sony's optical-disc line of acquisition gear, used by GE-owned NBC at the Beijing Olympics.
Sony's Professional Optical Disc has won the Peter Wayne Award presented by the International Association of Broadcasting Manufacturers at IBC2003.
Storage Supersite readers chime in with their observations about the vulnerability of bare-naked optical media, and Editor David Morgenstern offers some hints about keeping discs fresh and functional.
Case Western Reserve University researchers have developed technology aimed at making an optical disc that holds 1 to 2 terabytes of data—the equivalent of 1,000 to 2,000 copies of Encyclopedia Britannica.
Researchers have developed technology aimed at making an optical disc that holds 1 to 2 terabytes of data – the equivalent of 1,000 to 2,000 copies of Encyclopedia Britannica.
"Over time, an optical disc will be as much of an historical curiosity as a floppy disk ," said Michael Gartenberg, a tech-industry analyst with research firm Gartner Inc.
Recent news and coverage of Optical Discs.
A reserved area on a computer's storage device (hard disk, optical disc, etc.
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In science:

Thus, in the presented worldview, galaxy discs exist in two phases - one, the optical disc, which is described by the quasi-classical theory and the other, the radio disc, described by the quasi-relativistic theory.
Flatness in disc galaxy dynamics without MOND or dark matter
These vary from non-monotonic behaviour (typically) near the central regions, through generally monotonically rising sections through, finally, abrupt transitions into almost perfect flatness somewhere in the boundary between the optical and the radio parts of the disc.
Flatness in disc galaxy dynamics without MOND or dark matter
Correspondingly, our main task here is to show how the flat radio disc can be understood from the same general theoretical perspective and finally merged seamlessly with the optical mid-region.
Flatness in disc galaxy dynamics without MOND or dark matter
The statistical success of the simple power-law formulation for outer-disc optical rotation curves prompted a much deeper study of the underlying quasi-classical theory.
Flatness in disc galaxy dynamics without MOND or dark matter
However, according to the theory, these non-power-law solutions can persist over small radial ranges and are therefore, in terms of the theory, responsible for much of the complexity commonly observed within optical discs.
Flatness in disc galaxy dynamics without MOND or dark matter
The quasi-classical one-clock model has enjoyed a great deal of success within the context of dynamics in the optical disc - but it fails to admit the possibility of a transition to flatness within discs.
Flatness in disc galaxy dynamics without MOND or dark matter
It follows that if the conditions for transition to flatness in the radio disc are satisfied within any given disc (that is, f (p, q ) = 0), then the conditions for a non-zero power-law solution within the optical disc are excluded.
Flatness in disc galaxy dynamics without MOND or dark matter
But this is contrary to the conclusions the analyzes of Roscoe [27, 30] for the generality of optical discs - that is, there are substantial reasons for believing that the transition to flatness does not occur within the context of the quasi-classical model.
Flatness in disc galaxy dynamics without MOND or dark matter
From the theoretical point of view, the soft quasi-thermal component is thought to be the clear signature of a geometrically thin, optically thick accretion disc (Shakura & Sunyaev 1973; Pringle 1981).
Accretion modes and jet production in black hole X-ray binaries
Studies have detected rotational lines of various molecules at mm wavelengths (most notably CO, e.g., Dutrey et al., 1996, 2003), but the brightest of these lines are invariably optically thick and therefore probe only the surface layers of the disc.
From discs to planetesimals I: evolution of gas and dust discs
We assume that the disc is geometrically thin, and also that the disc is optically thick to Lyman continuum photons: both of these assumptions are valid for CTTs.
From discs to planetesimals I: evolution of gas and dust discs
In this phase the inner disc is optically thin to ionizing radiation, and the disc is dispersed from the insideout by the (direct) photoevaporative wind.
From discs to planetesimals I: evolution of gas and dust discs
The X-rays are emitted by the ADAF while the UV/optical radiation originates in the outer cold disc.
Disc instabilities and "soft" X-ray transients
The disc color temperature distributions are also flatter than the expected T ∝ R−3/4 law for steady-state optically thick discs models.
HST/FOS Time-resolved spectral mapping of IP Pegasi at the end of an outburst
For the three runs, the radial distribution of the disc color temperatures is flatter than the expected T ∝ R−3/4 law for steady-state optically thick discs.
HST/FOS Time-resolved spectral mapping of IP Pegasi at the end of an outburst
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