Laboratory samples deemed ‘unsuitable for analysis’ can be diagnostically useful

Can Spurious States Be Useful?

Michel e C eccarelli Isti t uto di Ri cerca sui Sist emi In form atici Perelleli, IR SIP-CNR 80125 Nap oli, It aly Ab stract. Additive automata are analyzed and used as associative memories. Th eir storage capacity is comput ed as well as the attrac tion basin of each memorized pattern. We show how such systems can be used when the patterns to be memorized have a subset of relevant features; "s...

Can viruses ever be useful?

M ost of the terms used for computer viruses arc metaphors: they have a largely medical origin, and are seductive if not literally sexy. The very real worries WC have about AIDS, for example, no doubt colour the way we talk about computer viruses. At the extreme, abstractly viruses arc clearly just algorithms, and like any other algorithm they arc good for some things and not good for others. T...

Commentary: Matched cohorts can be useful.

Can Quantum Computers Be Useful When There

Formulation of the problem. Quantum computers (see, e.g., 5]) have a potential of speeding up computations in many important problems. For example: By using Grover's algorithm 3, 4], for any given error probability e 0 , we can search for an item in an n-item (un-sorted) database in (p n) steps (where checking that a given element is the desired one is counted as a single step). By contrast, th...

Bronchoalveolar lavage can be clinically useful.

involvement; neither survived a year and both required thoracotomy to establish the diagnosis. In summary, the study by Cordier and colleagues includes all presentations of pulmonary amyloidosis and provides sufficient clinical detail for a practicing physician to classify properly and thereby permit optimal management of patients presenting with this uncommon manifestation of a disease whose p...