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HVD

   Also found in: Acronyms, Wikipedia 0.03 sec.

HVD

(1) (High Voltage Differential) See SCSI and differential signaling.

(2) (Holographic Versatile Disc) A high-capacity optical disc from the HVD Forum (www.hvd-forum.org) that combines single beam holographic storage and DVD technologies to provide cartridge capacities reaching 1TB and beyond. Formed in 2005 as the HVD Alliance, the first HVD standards were released in 2007 for 100GB read-only (ECMA-378) and 200GB recordable (ECMA-377) formats.

HVD uses the conventional CD/DVD pit layer for addressing the disc, on top of which is the holographic recording layer. A red laser reads the addresses, while a green or blue laser reads and writes the holograms.

Single Beam Holography
Throughout the history of holographic storage research, two separate laser beams have been used to write the holograms at the intersecting point. Using Optware's Collinear Holography, HVD combines the two lasers into one lens, which reduces the size and cost of the mechanism. See holographic storage.



Layers in an HVD Disc

HVD - High Voltage Differential


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Interestingly, there was greater difference between the groups when asked about their interaction with diverse others during the parent-teacher encounters, with HVD participants expressing more frequent contact during these interactions, F (1, 280) = 19.
Now that I'm out in the field: student teaching and valuing diversity by Wilder, Joyce / Journal of Instructional Psychology
The contract, to be executed through PerkinElmer's regional distributors HVD Vertriebs Gmbh and Gamidor Limited, will fulfill a recent mandate by the Medical Research Infrastructure Development and Health Services Fund to substantially expand its newborn screening program to cover Israel's entire population and increase the number of tests that will be screened for indications of disease.
PerkinElmer to Expand Neonatal Screening Program in Israel; Selected ... by Business Wire
That is, LVD or LVD/MSE terminators are used for LVD; HVD terminators for HVD; and SE active terminators for SE SCSI.
SCSI Cables: more than a couple of connectors and a few pieces of wire by Stein, Jim / Computer Technology Review
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