Just as the trade in physical commodities allows farmers to hedge against abrupt swings in price and enables consumers to count on steady supplies, economists and communications experts say a new approach that treated scarce frequencies as a commodity would allow new and older technologies to continue to flourish.
Bell and some of its independent rivals in the United States have licked the problem of congestion on the scarce radio frequencies that the portable equipment would have to use.
Psychologic studies in patients with benign paroxysmal positional vertigo (BPPV) are scarce, considering the high frequency of the disorder.
In this family, the wide array of symptoms, severity, age of onset and frequency (from scarce attacks to over 200 episodes across a lifetime) suggests that genetic factors do not have an exclusive role in the clinical expression.
Unfortunately, information on secretion of Hsp60 by tumors is scarce in what concerns frequency of the phenomenon, mechanism, and physiopathological role.
To tailor follow-up schedules and to optimise allocation of scarce resources, risk factors, frequency, and duration of follow-up should be taken into account.
One of the several methods in estimating flood quantiles in ungauged or data-scarce watersheds is regional frequency analysis.
Since the use of concrete viaducts is predominant in railway construction due to scarce land resources, low-frequency (20 200 Hz) structure-radiated noise from concrete bridges is a principal concern.
In terms of the scarce spectrum resources, co-channel frequency allocation scheme has been paid much attention recently to improve the spectral efficiency.
