A tremendous amount of digital multimedia data is broadcasted daily over internet. Digital data being very quickly and easily duplicable, intellectual property rights protection techniques, appeared about fifty years ago (see (14) for an extended review). Digital watermarking was born. Since its birth, many watermarking techniques appeared, in all possible transformed spaces. However, an import...

In the paper the main attention is paid to conditions on algebras from a given variety Θ which provide coincidence of their algebraic geometries. The main part here play the notions mentioned in the title of the paper.

GeoThms is a web-based framework for exploring geometrical knowledge that integrates Dynamic Geometry Software (DGS), Automatic Theorem Provers (ATP), and a repository of geometrical constructions, figures and proofs. The GeoThms users can easily use/browse through existing geometrical content and build new contents. In this paper we describe GeoThms functionalities, focusing on the interface s...

Primljeno (Received): 2011-10-10 Prihvaćeno (Accepted): 2012-02-28 Original scientific paper In today's medicine, especially in the field of orthopedic surgery, it is very important to use geometrically accurate and anatomically correct geometrical models of human bones for the pre-operative planning and implants creation. In order to create such models, two new methods for geometrical modeling...

Based on Bohr’s equivalence relation for general Dirichlet series, in this paper we connect the families of equivalent exponential polynomials with a geometrical point view related to lines crystal-like structures. In particular characterize relation, and give an alternative proof Bochner’s property referring these functions, through new perspective.

This paper proposes a novel watermarking algorithm of 3D CAD product model, which is able to keep strictly geometrical shape around embedding watermark and make watermarked model have function transparency. Firstly, the isolated geometrical entities are selected as watermark carriers. Secondly, the watermark is embedded into the isolated geometrical entities with a geometric entity substitution...

A model capable of simulating evaporators with multiple modules under frosting conditions was developed and validated. Effects of various geometrical parameters on fan and compressor power consumption were quantified and some general guidelines for design were developed. These general guidelines were used to design new prototypes for a given external load keeping in mind the packaging restricti...