Due to increase in web-based applications, the need for enhanced information retrieval system that accommodate user’s needs become crucial. Most of commercial information retrieval system are based on standard Boolean model and at less scale vector models. Although the deficiencies of these models are now part of text-book knowledge, the development of new models still have to overcome the feas...

In this paper the role of logic as a formal basis to exploit the query evaluation process of the boolean model and of weighted boolean models is analysed. The proposed approach is based on the expression of the constraint imposed by a query term on a document representation by means of the implication connective (by a fuzzy implication in the case of weighted terms). A logical formula correspon...

Boolean expressions are popularly used for modelling decisions or conditions in specifications or source programs and they are very much prone to introduction of faults. Even for a Boolean expression with few numbers of literals the possible number of test cases can be quite large. Boolean expressions with n variables require 2 n test cases to distinguish from faulty expression. In practice, n ...

Recently, special attention has been paid to artificial groundwater recharge in water resource management in arid and semi-arid regions. Water resources distribution in these regions is extremely uneven, both in spatial and temporal forms and groundwater is the only water resource and is a major constraint on economic and social development. Artificial groundwater recharge is considered an appr...

We demonstrate experimentally that the well-known oscillatory BelousovZhabotinsky (BZ) reaction can be exploited to process both Boolean and fuzzy logic if the input variables are either the volumes or the phase of addition of pulse-injected solutions of inhibitor (bromide) and activator (silver ion) and the output variable is the oscillation period. Analysis of the relations between the input ...

One of hindrances faced by Indonesia agriculture sector is domestic production that does not cover the market demand such as wheat commodity. The aim this research to calculate spatial planning for commodity in Tanah Datar Regency using matching calculation with Fuzzy set method find out land physical ability. used fuzzy equations and Boolean approach. results obtain suitability 111.132 ha suit...

Fuzzy cellular automata (FCA) are continuous cellular automata where the local rule is defined as the “fuzzification” of the local rule of a corresponding Boolean cellular automaton in disjunctive normal form. In this paper, we consider circular FCA; their asymptotic behaviours had previously been observed through simulation and FCA had been empirically classified accordingly. However, no analy...

This section define a level subring or level ideals obtain a set of necessary and sufficient condition for the equality of two ideals and characterizes field in terms of its fuzzy ideals. It also presents a procedure to construct a fuzzy subrings (fuzzy ideals) from any given ascending chain of subring ideal. We prove that the lattice of fuzzy congruence of group G (respectively ring R) is isom...

The Teleo-Reactive (T-R) paradigm for computing and organizing actions for autonomous agents in dynamic environments can be viewed as having a foundation triplet of durative actions, circuit semantics, and boolean logic. This foundation is intended to enable the construction of semantic circuitry for the continuous computation of parameters and conditions on which agent action is based. Drawing...

We study some boolean-like laws with iterative variables in Fuzzy Logic. We show that beyond the classical De Morgan triplets of connectives described by t-norms, t-conorms and strong negations there are interesting models with infinite solutions and surprising situations where there are none.