Recording films for optical disk. Recording by hole formation, and phase change.

Recording Characteristics of High-Density Thin Optical Disk Using Near-Field Optical Recording

Several integrated broadcast-broadband services, such as Hybridcast, have recently been launched which allow viewers to receive content via the airwaves together with additional information about the content via the Internet. By sharing personal preferences such as viewing histories with service providers, viewers can expect more attractive and personalized services. Viewing histories used for ...

A survey of codes for optical disk recording

We report on 20 years of development of codes for optical disk recording systems. A description of the state-of-the-art and feasible options for future extensions and improvements are given.

CoPtCr:C nanocomposite films for high density recording

Noise in Disk Data-Recording Media

Measurements were made of recording medium noise in erased disks using an in-contact magnetoresistive element and an inductive head supported on an air bearing slider. Four types of coatings on aluminum disks were examined: thin, transition-metal alloy film, CrO,, FeCo particle, a n d y-Fe,O:,. Results obtained by means of three measurement techniques are in qualitative agreement and indicate t...

Perinatal death recording: time for a change?

The new perinatal death certificate proposed by the World Health Organisation was examined in relation to existing measures for recording perinatal death statistics and also with regard to new information gathered. Present procedures appear to underestimate the number of perinatal deaths by roughly 10%, though late registrations may lower this figure slightly. The use of a minimum birth weight ...