This paper describes the f i r s t stages of an experimental i nves t iga t ion into the e f fec ts of using var ious c a l c u l i to propagate uncer ta in ty in an i n te rac t i ve expert system for in format ion r e t r i e v a l . We in te rp re t uncer ta in ty values as p a r t i a l t ru ths rather than p r o b a b i l i t i e s , and draw upon the mathematics of mul t i -va lued log ic...

Abs t rac t : This paper presents a review of d i f f e r e n t approximate reasoning techniques which have been proposed for dea l ing w i t h uncer ta in or imprecise knowledge ,espec i a l ly in expert systems based on product i o n ru le methodology. Theore t i ca l approaches such as Bayesian i n fe rence ,Sha fe r ' s b e l i e f theory or Zadeh's p o s s i b i l i t y theory as wel l as ...

this paper assumes the cell formation problem as a distributed decision network. it proposes an approach based on application and extension of information theory concepts, in order to analyze informational complexity in an agent- based system, due to interdependence between agents. based on this approach, new quantitative concepts and definitions are proposed in order to measure the amount of t...

S u m m a r y Two overriding considerations shaped the development of early research on the biological effects of microwave radia t ion--poss ib le medical application (diathermy) and uncer ta in ty about the hazards of exposure to radar. Reports in the late 1940s and early 1950s of hazards resulting from microwave exposure led to the near abandonment of medical research related to microwave di...

Pop u la tions of Lesser Snow Geese Anser caerulescens caerulescens in the mid-continent of North America have increased to the point where they are causing serious damage to some Arctic coastal eco sys tems. A recent modelling exercise by R.F. Rockwell and col leagues (referred to as the Original Model) suggested that increas ing harvest rates of adults to approx i mately twice the average lev...

Secret sharing schemes are one of the most important primitives in distributed systems In perfect secret sharing schemes collabo ration between unauthorised participants cannot reduce their uncer tainty about the secret This paper presents a perfect secret sharing scheme arising from critical sets of Room squares

The DEVS formalism developed by Zeigler and Sarjoughian is extended by the use of category theory. Several functors are needed to produce the correct categories. Verification and validation is modeled by adjunction and the information-gap approach to uncer-

A high leve l v i e w o f the uncer ta in ty i n spec i f i cat ion i s presented t o explain the problems inherent in s o f t w a r e development and maintenance. The v i e w suppor ts the need f o r p ro to typ ing throughout s o f t w a r e develoDment and mainte nance.

Many important issues in hydrological science are of a conceptual nature rather than computational or experimental. Valuable insight into these issues can be gained by means of critical conceptualism and a knowledge synthesis (KS) framework. By focusing on conceptual processes and not just form manipulations, KS develops the rational means for integrating physical knowledge bases relevant to th...

Uncertainty is an important linguistic phenomenon that is relevant in many areas of language processing. While earlier research mostly concentrated on the semantic aspects of uncertainty, here we focus on discourseand pragmaticsrelated aspects of uncertainty. We present a classification of such linguistic phenomena and introduce a corpus of Wikipedia articles in which the presented types of dis...