Bundy. Silver and Plummet (1985) provide an analysis of the Focussing algori thm and the Classification algorithm in the case where the description space consists of a set of relation trees. This paper discusses an extension to their analysis in which the description space is construed as a geometric space. Under this construal the behaviour of both the Focussing algori thm and the Classificati...

Human Contact Network is a kind of DTN (Delay Tolerant Networks), and is closely related with people’ activities. Owing to its intermittent connectivity and unique human mobility patterns, how to transmit data in an effective way is a challenging problem for DTN. In this paper, considering the regularity of people activities, we introduce a THM (Trip History Model) to record the activities of p...

The cancer risks (CR) by oral ingestion, dermal absorption, and inhalation exposure of trihalomethanes (THM) from tap water of ten districts in Fortaleza, Brazil were estimated. The mean levels of THM compounds were obtained in Fortaleza tap water as follow: 63.9 microg L(-1) for chloroform (CHCl(3)), 40.0 microg L(-1) for bromodichloromethane (CHBrCl(2)), and 15.6 microg L(-1) for dibromochlor...

Given a sentential logic S there exists a least sentential logic ad S associated with the set S Thm of the theorems of . S If the logic S is equivalential, then the behavioral theorems of S Thm can be determined by an equivalence system for , S but, possibly, they may also be determined by any admissible equivalence system, i.e., an equivalence system for . ad S Babenyshev and Martins studied t...

(1.2) the ranges of f and g are identical on almost all OK/p. The most trivial cases are where g(x) = f(ax + b) for some a, b ∈ Q̄, the algebraic numbers. When K = Q, mostly that relation forces a, b∈K. For example this holds when f is indecomposable (not a composite of lower degree polynomials). With the indecomposability assumption, solutions to Davenport’s and Schinzel’s problems were essenti...

Hgl -,Cd,Te and Cdl -,Zn,Te single crystals were grown by the travelling heater method (THM), applying two different techniques of artificially stirring the solution zone. Accelerated crucible rotation (ACRT) was used in a vertical growth arrangement and compared a technique with constant rotation around the horizontal axis of the ampoule. The dominant hydrodynamic mechanisms of both methods ar...

This paper lays out the basic theory of the down operator D of the infinite polynomial ring R = k[x0, x1, x2, ...], defined by Dxi = xi−1 (i ≥ 1) and Dx0 = 0. Here, k is any field of characteristic zero. The only linear invariant is x0, and the quadratic invariants are well known and easily described. One of the paper’s main results, Thm. 6.2, gives a complete description of the cubic invariant...