An original digital signature scheme based on action of infinite ring on module is presented. It is assumed that the ring contains an infinite multiplicative monoid. The ring action is defined as monoid elements's action on the module element as an operator. The signature scheme is based on particularly designed one–way functions (OWFs), using a postulated hard problem in monoid action level. T...

The bit rate of a single channel of high-quality digital audio may now be reduced by up to 90% using so-called 'perceptual coding systems' with minimal effects on sound quality. Such systems form the basis of proposals for digital audio broadcasting (DAB), this being the subject of the Eureka 147 programme, and they offer the possibility for extending the storage times available from digital re...

This position paper presents the notion of multiple metaphor environment and discusses principles and techniques for constructing user interfaces as multiple metaphor environments. Though, multiple metaphor environments represent a generic concept, they are particularly relevant to novel application domains and technologies, such as Digital Libraries.

The interest in the analysis of library user behavior has been increasing rapidly, since the advent of digital libraries and Internet. In this context, we analyze the queries posed to a digital library and recorded into the Z39.50 session log files and we construct communities of users with common interests, using data mining techniques. One of our main concerns is the construction of meaningfu...

A digital mammography device uses a mosaic of electronic digital imaging arrays to scan an x-ray image. The mosaic of arrays is repositioned several times to expose different portions of the image, until the entire image is scanned. The data generated by the arrays during each exposure is stored in a computer. After the final exposure, the computer combines data of the several partial images to...

Digital libraries are on-line collections of heterogeneous information which are usually maintained by some digital librarian. They pose interesting problems for design because of the large amounts of information involved and the difficulty of determining just what users wish to do with such systems. Elsewhere (Bryan-Kinns & Blandford, 2000) we have examined the use of digital libraries in term...

Digital Libraries are omnipresent nowadays. Almost every single institution is hosting its own. Sometimes they even use their own servers and customized software to provide information to users. However, a single isolated Digital Library is valueless. It must be connected “to the world”: to users as well as to content and services provided by other Digital Library systems. Since it is not possi...

In the paper, we propose a new digital signature scheme based on factoring and discrete logarithms. Specially, we prove that the security of the proposed signature scheme is based on both the security of the ElGamal signature scheme and the security of the modified OSS signature scheme. This is the first scheme which can be proved that its security is based on two hard problems. Like Meta-ElGam...

 A digital support can be exploited more efficiently if it is linked to a processing unit. In this way, electronic illustrations by adding computational ability improve the common illustrations. For instance, an electronic illustration can be recomputed with different parameters. This technical report presents an environment allowing lab-sessions in Digital Image Processing (DIP) to be held on...

In this paper we present DiLAS, a dedicated service for the management of annotations, supporting complex collaborative applications in distributed environments. The mission of DiLAS is to foster change in users’ interaction with digital libaries (DL) and contribute to developing services for social infrastructures in DLs. We thus introduce a new independent annotation service for interactive k...