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The “storm-time” component of variation of the terrestrial magnetic field, that is, the component which correlates with the interval of time since the onset of a magnetic storm; used as an index of intensity of the ring current.


Daylight-Saving Time.


(1) (DeSTination) Contrast with SRC, which is an abbreviation of "source."

(2) (Digital Signal Trust Company, Salt Lake City, UT, www.digsigtrust.com) An organization that sets up and manages PKI systems for companies and industry groups. Using third-party software, it serves as a certification authority (CA), manages the repository and provides a secure location for the private keys. Founded in 1996, Utah-based DST was the first licensed CA in the U.S. and the first PKI service organization. Utah was the first state in the U.S. to pass digital signature legislation.

In 2002, DST was acquired by Identrus LLC (www.identrus.com), a global leader in digital trust services and secure e-commerce. See PKI.

(3) (Data Storage Technology) A high-capacity magnetic tape technology from Ampex that is based on the digital composite D2 format for the broadcasting industry. It uses the same 19mm, helical scan transport, but provides higher capacities with Ampex's proprietary Data D-2 (DD2) format. DST cartridges range from 50 to 330GB and are suited for uncompressed digital video (movies, commercials, etc.) and high-resolution images as well as general data backup for huge databases. Ampex's Data Instrumentation Systems (DIS) tape technology is a counterpart line that provides optional modes and interfaces for data acquisition devices. See magnetic tape.

DST Tape Storage
DST is not exactly for home computer use. The large 330GB tape cassette, which is as big as a laptop computer, could back up the entire neighborhood. The 4mm DAT cassette is shown for size comparison.
References in periodicals archive ?
In patients with renal failure, the recommended screening test is the 1-mg dexamethasone suppression test.
Researchers striving to identify an endocrine basis for suicide have demonstrated that hyperarousal of the hypothalamic-pituitary-adrenal (HPA) axis, as manifested by a nonsuppressing dexamethasone suppression test (DST), can be an indirect predictor of suicide risk.
Generally, we consider the overnight dexamethasone suppression test to be the gold standard test," said Schott.
Masses that are less than 3 cm and show no evidence of rapid growth or hormonal change are not likely to become cancerous and should be monitored at yearly intervals with a dexamethasone suppression test.
The 2 recommended screening tests for Cushing syndrome are the overnight dexamethasone suppression test and the measurement of 24-hour urinary free cortisol excretion.
The dexamethasone suppression test helps to distinguish patients with pituitary adenomas from those with ACTH- or cortisol-producing tumors.