, and report on experiments that demonstrate their effectiveness in a variety of contexts on the World Wide Web. The central issue we address within our framework is the distillation of broad search topics, through the discovery of “authoritative ” information sources on such topics. We propose and test

Registration is a fundamental task in image processing used to match two or more pictures taken, for example, at different times, from different sensors or from different viewpoints. Over the years, a broad range of techniques have been developed for the various types of data and problems

be made between the faculty of language in the broad sense (FLB) and in the narrow sense (FLN). FLB includes a sensory-motor system, a conceptual-intentional system, and the computational mechanisms for recursion, providing the capacity to generate an infinite range of expressions from a finite set

the volume containing the ores, being separated by zones free of both sediments and Ni-Cu sulfides. Generally, they are broadly lenticular, are not very extensive in area, and correlate poorly laterally. Mineralogically and chemically, the sediments are very variable, but much of this is at-tributable simply

, we are concerned with Fokker--Planck equations for which the drift term is given by the gradient of a potential. For a broad class of potentials, we construct a time--discrete, iterative variational scheme whose solutions converge to the solution of the Fokker--Planck equation. The major novelty

, and distinguish three broad classes of ambiguity according to where they are located in the interpretative relationship linking person and artefact. Ambiguity of information finds its source in the artefact itself, ambiguity of context in the sociocultural discourses that are used to interpret it, and ambiguity

ABSTRACT What good is self-control? We incorporated a new measure of individual differences in self-control into two large investigations of a broad spectrum of behaviors. The new scale showed good internal consistency and retest reliability. Higher scores on self-control correlated with a higher

introduction to the primary components of semantic models, which are the explicit representation of objects, attributes of and relationships among objects, type constructors for building complex types, ISA relationships, and derived schema components. Next, a survey of the prominent semantic models

and their relationships to satisfaction and performance. Recently, Judge, Locke, and Durham (1997) proposed a higher order construct they termed core self-evaluations or, more simply, positive self-concept. According to Judge et al. (1997), this construct is a broad dispositional trait that is indicated by four more

in social support research include studies of the negative effects of social relationships and of support giving, mutual coping and support-giving dynamics, optimal "matches " between individuals' needs and support received, and properties of groups which can provide a sense of social support