☆ Como citar este artigo: Korppi M. Whooping cough – still a challenge. ☆☆ Ver artigo de Ferronato AE et al. nas páginas 549-53. diagnosticadas como casos de coqueluche, e posteriormen-te transmitiram a bactéria B. pertussis aos neonatos das famílias. Durante as duas últimas décadas do século passa-do, muitos pais recusaram a vacinação contra pertussis, e a incidência de coqueluche mais uma vez...

We introduced the notions of fuzzy C e-I(ec, eo) functions and fuzzy completely C e-I(rc, eo) functions via fuzzy e-open sets. Some properties and several characterization of these types of functions are investigated.

This paper describes the development of a fuzzy decision support system (FDSS) for the assessment of risk in E-commerce (EC) development. A Web-based prototype FDSS is suggested to assist EC project managers in identifying potential EC risk factors and the corresponding project risks. A risk analysis model for EC development using a fuzzy set approach is proposed and incorporated into the FDSS....

Assume there exists a pseudo-elliptic monoid. We wish to extend the results of [39] to meromorphic, positive, contra-everywhere open planes. We show that E = ∅. It has long been known that u < i [39]. In [39], it is shown that sF,p 6= V ′′.

With the development of e-commerce websites, more and more firms use websites to advertise their products and brands and statues. How to evaluate marketing performance of firms on web-based e-commerce becomes more important problem. This paper analyses influencing factors of marketing performance under e-commerce websites. And it suggests an evaluation model based on combination of fuzzy logic ...

Klaus S hmid and Volker Krebs Universität Karlsruhe (TH), Institut für Regelungsund Steuerungssysteme Kaiserstr. 12, D-76131 Karlsruhe, Germany e-mail: {s hmid, krebs} irs.ete .uni-karlsruhe.de Abstra t. A dynami fuzzy system is a mapping of fuzzy input values onto a fuzzy output value with a feedba k to the input. In this paper, we present a new rule-based inferen e method that an be used in d...

The aim of this paper is to investigate the lattices of group fuzzy congruences and normal fuzzy subsemigroups on E-inversive semigroups. We prove that group fuzzy congruences and normal fuzzy subsemigroups determined each other in E-inversive semigroups. Moreover, we show that the set of group t-fuzzy congruences and the set of normal subsemigroups with tip t in a given E-inversive semigroup f...

E-Government (e-Gov) is becoming an important means to produce value for citizens by using innovative technologies in the delivery of more advanced, efficient and personalized services. In this paper, we propose a model for the assessment of the service value defined as the trade-off between benefits and sacrifices perceived by citizens according to their service usage experience. Since human p...

For any two points P = (p (1) ,p (2) ,...,p (n)) and Q = (q (1) ,q (2) ,...,q (n)) of R n , we define the crisp vector → PQ = (q (1) −p (1) ,q (2) −p (2) ,...,q (n) −p (n)) = Q(−)P. Then we obtain an n-dimensional vector space E n = { → PQ | for all P,Q ∈ R n }. Further, we extend the crisp vector into the fuzzy vector on fuzzy sets of R n. Let D, E be any two fuzzy sets on R n and define the f...

This paper presents a Fuzzy Classi er System(FCS) which can discover fuzzy rules e ciently. The system translates human's knowledge into symbolic information, and e ectively limits its search space for the fuzzy rules by utilizing the symbols. The system can also extracts symbolic information from the acquired fuzzy rules for e cient exploration of another new fuzzy rules. Simulations are done ...