The main objective of this work is to exploit the relationship between the information findability problem and a subject-based organization of information. Identification of a subject is involved when one wants to say something about that subject or when he or she tries to comprehend what was said by others about it. An example of this type of duality can be seen in the information world where ...

The aim of this paper is to prove the following results: a continuous map f : [0, 1]→ [0, 1] is chaotic iff the shift map σf : lim ← ([0, 1], f)→ lim ← ([0, 1], f) is chaotic. However, this result fails, in general, for arbitrary compact metric spaces. σf : lim ← ([0, 1], f) → lim ← ([0, 1], f) is chaotic iff there exists an increasing sequence of positive integers A such that the topological s...

Houston Anglos of all ages show advanced degrees of /u/-fronting. However, a close acoustic analysis of the fronted /u/ of younger and older Anglo Houstonians reveals two distinct types: a more monophthongal type, consistent with prior descriptions of fronted /u/ in the rural South, and a more diphthongal type, consistent with descriptions of /u/-fronting in non-Southern speakers. The two types...

Concern for environmental issues has become a reality in all sectors of society, mainly among researchers and professionals who work directly with environmental status. In this context, several studies have been undertaken on sustainable development of the Brazilian Amazon, generating a large amount of data and information. Environmental area characterization involves the knowledge about their ...

A group memory of a project is an information space storing the documents produced and exchanged by members of the group, which may include the electronic discussions that took place during the life of the project. Accessing the information in the group memory using a traditional text search method is not always effective as the relationship between the documents and emails (for example the con...

Topic maps are very powerful as they allow to organize information, but they may be very large. Intuitive visual user interfaces may significantly reduce the cognitive load of the user when working with these complex structures. Visualization is a promis ing technique for both enhancing users' perception of structure in large information spaces and providing navigation facilities. It also enabl...

Since the Topic Map standard describes a prospective knowledge-structuring model that can be used in a huge variety of knowledge domains the amount of applications utilizing this standard grew enormously. Anyhow, as far as we know, there is no distributed editor of Topic Maps available on the market, that supports an intuitive possibility to manipulate or visualize Topic Maps in the World Wide ...

This paper introduces a simple and effective chaotic system using a combination of two existing one-dimension (1D) chaotic maps (seed maps). Simulations and performance evaluations show that the proposed system is able to produce many 1D chaotic maps with larger chaotic ranges and better chaotic behaviors compared with their seed maps. To investigate its applications in multimedia security, a n...