The concept of model transformations is of increasing importance in different areas of Computer Science, but up to now, there is a lack of common understanding concerning the mathematical and practical point of view. In this paper, we discuss some of the different aspects. Especially interesting is the new proposal of the POPL’07 keynote speaker Don Batory claiming that model transformations sh...

This paper analyzes an optimal data co l lection and processing system for detecting a random signal f ield in a random noise f ield employing multiple antennas. The statist ical model consists of a Gaussian random signal f ield and an independent Gaussian noise f i e ld . The time optimal data processing system to be analyzed is specified in terms of array deployment and signal/noise space tim...

The main problem encountered during multimedia transmission is its protection against illegal distribution and copying. One of the possible solutions for this is digital watermarking. Digital audio watermarking is the technique of embedding watermark content to the audio signal to protect the owner copyrights. In this paper, we used three wavelet transforms i.e. Discrete Wavelet Transform (DWT)...

Data clustering is the concept of forming predefined number of clusters where the data points within each cluster are very similar to each other and the data points between clusters are dissimilar to each other. The concept of clustering is widely used in various domains like bioinformatics, medical data, imaging, marketing study and crime analysis. The popular types of clustering techniques ar...

S U M M A R Y — Th i s s tudy quantif ies the m a i o r e lect ron m i c r o s c o p i c changes in l imb muscle b iops ies f r o m 31 out of 34 pat ients wi th the s y n d r o m e of ch ron ic p rogress ive external oph tha lmopleg ia . Pat ients w e r e d iv ided into three cl inical g r o u p s — A ) 10 sporad ic cases wi th musc l e weakness o n l y ; B ) 9 familial cases w i t h musc le we...

This work st and s as a ~ontribution in the area of the man-ma -::hin e -::Qmmuni~ations. In the f ield of Computer Aided Design the solu ti on of su-::h a problem has led us to the definition and realization of an indipendent in terfa-::e pla-::ed in front of solid modellers a-::~epting C.S.G. definitions. This s ystem is able to simu late the orthographi~ proje-::tio ns of the spe-::ified par...

Four formalisms are outl ined. Crystal f ield theory explains the color as well as the f luorescence in transit ion-metal-containing minerals such as azurite and ruby. The trap concept, as part of crystal f ield theory, explains the varying stabi l i ty of electron and hole color centers with respect to l ight or heat bleaching, as well as phenomena such as thermoluminescence. The molecular orb...

Sebaceous adenomas o f sa l ivary gland or igin are ext remely rare tumors, compr i s ing 0.1% of all sa l ivary g land neop lasms and less than 0.5% of sa l ivary adenomas. 1 Cutaneous sebaceous adenomas present as s low-growing painless f i rm masses; they appear predominan t ly during the sixth and seventh decades of l ife 2 as sol i tary les ions o f the face or scalp. 3 Rulon and He lwig 4...