was achieved by letting the turntable rotate and translate synchronously while the radiation source and the detector keep still.
His recent achievements include: providing the first physical explanation for the role of a prominent flap seen in mammalian ears in 2004; discovery of a novel helical scan
in the ear directivity of a bat in 2006; discovery of frequency-selective beam-forming by virtue of resonances in noseleaf furrows of a bat, an entirely new bioacoustic paradigm in 2006; establishing the first immediate and quantitative characterization of the spatial information created by a mammal's outer ear in 2007; and now uncovering the acoustic effect of non-rigid ear deformations in bats.
Toshiba America Medical Systems (Tustin, CA) introduced 160-detectorrow helical scanning, which is the helical scan
mode with the largest number of detector rows.
AIT is a helical scan
technology with a 1" per second transfer speed, while linear tape format specifies a very high transfer rate of 295" per second.
Relying on a 3.5-inch form factor, the tape drives use helical scan
technology to increase recording density for lower media costs and increased efficiency.
In addition to high-definition, long-duration digital videotape for home and broadcast use, applications currently being developed include high-capacity floppy disks, data and video storage tape for home network servers and magnetic storage tape for helical scan
and linear recording.
In recent years, two classes of tape recorder have dominated the high-altitude area -- the 1-in, transverse-scan DCRsi family from Ampex Data Systems (Redwood City, CA) and the 19mm helical scan
ANSI ID-1 products from Enertec (Clamart, France) and Metrum-Datatape (Monrovia, CA).
VXA is a helical scan
technology like those used by Exabyte Corp and Sony Corp, but is the only media not to be read by a streamer, Beavers explained.
At the Massachusetts Institute of Technology's Haystack Observatory in Westford, MA, Hans Hinteregger and Alan Rogers are working on an advanced system that may push linear recording technology beyond that achievable with helical scan
techniques, like VHS.