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(US), luster
a. a shiny metallic surface on some pottery and porcelain
b. (as modifier): lustre decoration
2. Mineralogy the way in which light is reflected from the surface of a mineral. It is one of the properties by which minerals are defined
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


(A French acronym for Synchronous real-time Lucid). Real-time dataflow language for synchronous systems, especially automatic control and signal processing. A Lucid subset, plus timing operators and user-defined clocks.

Designed for automatic control applications. It is based on the idea that automatic control engineers use to analyse, and specify their systems in terms of functions over sequences (sampled signals). It thus seems both safe and cost effective to try to compile directly those descriptions into executable code. A lot of work has been done, so as to get efficient compilation, and also in formal verification. The language has been used in nuclear plant control, and will be used in aircraft control.

["Outline of a Real-Time Data-Flow Language", J.-L. Bergerand et al, Proc IEE-CS Real Time Systems Symp, San Diego, IEEE Dec 1985, pp. 33-42].

["LUSTRE: A Declarative Language for Programming Synchronous Systems", P. Caspi et al, Conf Rec 14th Ann ACM Symp on Princ Prog Langs, 1987].
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References in periodicals archive ?
The Chinook TMs do not have NSNs for black lusterless paint in spray cans.
1-6): Mature shells are lusterless white, are up to nearly 30mm in standard length, are moderately stout, being 0.34-0.37 times as wide as long, and are decollated with 7.3-8.5 whorls remaining below the apical plug (vestiges of earlier whorls in the holotype and paratypes were removed to expose the plug).
The chemical bluing and browning methods that came next were quick methods that created an appealing lusterless finish that reduced the possibility that the glint off a gun would give away the shooter's presence to the enemy or to a game animal.
Following his recovery from the brutal flogging that he suffered at the whim of the Bulgarian army, Candide sees a beggar "covered with pustules, his eyes lusterless, the tip of his nose eaten away, his mouth twisted, his teeth black, and speaking in a hoarse voice, racked by a violent cough and spitting out a tooth with each effort he made to speak" (15).
In fact, some researchers say, shampoos formulated with sulfates can initiate hair loss and leave hair dull and lusterless.
I studied her pasty, puffed-out face and lusterless eyes and I knew she was very sick.
They know their lusterless but lofty assignment to be the transformation of(past) being into knowledge--or, as Burckhardt once so movingly put it: "Was einst Jubel und Jammer war, muss nun Erkenntnis werden." ("What once was joy and misery, must now be transformed into knowledge.") History became an object of knowledge, an object of research forever separated from the world of the subject, of the historian.
Being overweight also adversely affects the skin; overweight animals typically have dull, lusterless skin that is in turn more susceptible to disease processes.
Kinbote calls Shade "a fleshy Hogarthian tippler" and describes "his misshapen body, that gray mop of abundant hair, the yellow nails of his pudgy fingers, the bags under his lusterless eyes."
Yet the survival of a number of Warren Court precedents, predictably something more than lusterless shells, may serve to secure the Burger Court's reputation as a less threatening foe of criminal justice rights.
Despite the symbolism of aging (pallor framed by gray curls, furrowed brow, lusterless eyes inside dark circles, prominent nasal labial lines, fading features), the conjured portrait is of beauty, refinement, dignity, nobility, perseverance, intellectual cultivation.