Nicolae Constantinescu

Intuitionistic fuzzy system for fingerprints authentication

Using a fuzzy logic control system, we propose in this paper an optimized method to reduce the points number to be used in order to identify a person using fuzzy fingerprints. Two fingerprints are similar if n out of N points from the skin are identical. We discuss a criteria to choose these points. Our method compares two matching sets and selects the optimal set from these, using a fuzzy reasoning system based on intuitionistic fuzzy numbers. The advantage of our method with respect to the classical existing methods consists in a smaller number of calculations.

Towards Using Grid Services for Mining Fuzzy Association Rules

The knowledge grid provides us with the means to represent, share and manage globally distributed knowledge resources over the Internet. The process of analyzing geographically distributed large data sets for extracting novel and interesting patterns or models has become a major challenge during the last years. The knowledge grid infrastructure allows developing more efficient data mining applications that analyze this distributed datasets. The paper presents the design of a distributed algorithm for mining fuzzy association rules from the distributed databases over the grid.

HTML Pattern Generator--Automatic Data Extraction from Web Pages

Existing methods of information extraction from HTML documents include manual approach, supervised learning and automatic techniques. The manual method has high precision and recall values but it is difficult to apply it for large number of pages. Supervised learning involves human interaction to create positive and negative samples. Automatic techniques benefit from less human effort but they are not highly reliable regarding the information retrieved

The GN-authenticated key agreement

In this paper the authors present two protocols for the common key establishment. The first protocol, which has two steps, assures the authentication of the common agreement key. The second one is a three-pass authenticated agreement key protocol and it contains a step for the key confirmation. The security of both protocols results from the elliptic curve discrete logarithm problem and their security proof follows from some well known definitions. Also, the attack discussion of elliptic curve discrete logarithm problem is presented.

Implication-Based Support Measures for Fuzzy Association Rules

Several approaches generalizing association rules to fuzzy association rules have been proposed, so far. The quality measures have also been generalized. Such a measure is based on the so-called S-implicator. In this paper we point out some other implicators which can substitute the S-implicator in order to define new support measures which evaluate the quality of a fuzzy association rule, taking into consideration the non-contradicting rule examples (non-negative examples), while the classical measures use only positive examples.

Statistical Analysis of the Demographic Ageing Process in the EU Member States, Former Communist Countries

The aim of this paper is to make an analysis and a comparative study of the demographic ageing process in the former communist countries which are currently EU member states. Taking into account the complexity of the phenomenon, the study approaches only a part of the indices involved in this process. According to the structure of the population on groups of ages and sexes, the population pyramid is built and in this context we carried out various analyses and comparisons among countries. Further we approach determining demographic factors for the ageing process of the population, as for example the evolution of the young population, the mortality rate and the life expectancy and the changes in the population structure are pointed out with the help of the demographic dependency rate. There have been made a series of statistical correlations and predictions which allowed for a more concrete explanation of the evolution of the demographic ageing phenomenon.

WebKM - Online Data Mining System

The problem of using legacy information systems by making their services publicly available from the Web has become a tedious one due to the diversity of platforms (operating systems, programming languages, database management systems) on which they were implemented. In this paper we present an online system, WebKM, following the client-server paradigm, that allows executing data mining tasks from a thin client (Web Browser). An user is thus released from the management care of local installed software.

Web Services for Search Integration

This paper is closely related to the problem of finding elements having certain positions resulted after merging between two or more result sets. The problem is encountered frequently nowadays, a typical situation being a business distributed environment i.e. SOA approach, where as a direct consequence of aWeb search, each participating entity will provide a result set. The focus of paper is to describe a web service for optimally returning the k-th element obtained from joining web search services results into a composite result [3]. We introduce an optimized algorithm for solving the problem, based on a divide-and-conquer technique and we discuss, by means of examples, its performances as related to other approaches.

AHPA-Calculating Hub and Authority for Information Retrieval

The fast development of the World Wide Web makes searching and retrieving of information to become a not easy task. Two algorithms proposed around the fall of 1996, Page Rank [3] and HITS [9], became the center of majority research efforts. They try to remedy the abundance of results, bringing order with the help of notions related to prestige in social network analysis. Some approaches use the link structure of the web to find the importance of the web pages (Page Rank method [3]) or to determine their authority related to a particular topic (Hub and Authority concept). In this paper we propose a new method for calculating the authority of a web page.