GAMEC, J. — GAMCOVÁ, M.
The Fast Search Motion Estimation Algorithms and their Errors [full paper]
This paper presents the analysis of errors produced by block matching motion estimation methods with lower computational cost (fast search algorithms). We try to find an answer on the question what measure can be used to determine correctness of searched motion vectors and which motion vectors are founded as fault (corrupted by noise). We consider the vector fields obtained by using of full search algorithm (FSA) as lossless data. We take the vectors of movement obtained by using 2D logarithmic (2D log) search procedure as data corrupted by noise. The results of analysis can help optimize post processing of motion vectors in endeavoring to reduce computational cost or regularize vector fields.

NAAMA, B. — BOUZEBOUDJA, H. — RAMDANI, Y. — CHAKER,
A.:
Hybrid Approach to the Economic Dispatch Problem Using a Genetic and a QuasiNewton Algorithms [full paper]
In this paper, we present a hybrid optimization approach to solving the economic dispatch (ED) problem. The objective is to minimize the total fuel cost and keep the power flows within the security limits. The idea consists in combining principles from real coded genetic algorithms (RCGAs) [1] and a parallel quasiNewton method (QN), in order to find a better compromise tradeoff and a better precision while requiring a reasonable computing time. The approach that is presented utilizes both local and global optimization algorithms to find good design points more efficiently than either could. A parallel quasiNewton method is used to explore the space of research and exploit all local information to progress towards a better point.
The proposed approach improves the equality of the solution and speed of convergence of the algorithms. The hybrid methods developed is compared with a RCGAs and a classical methods of QN. The proposed approach has been tested on the IEEE 57 bus system [2].

ILLÉS, Z. — PŠENÁKOVÁ, I. — HEIZLERNÉBAKONYI, V.:
New Perspectives of MLearning [full paper]
The traditional learning methods were completed with electronic possibilities due to the spread of internet. The global needs, for mobilities have an effect of this field too. Be Mobile! Everything everywhere! We meet the usage of mobile environments in the most different field of life. There are available now a lot of educational, learning possibilities (ELearning). The needs of mobile technology, require that the methodology and the server framework of the ELearning toolkit has to be changed. It is often used MLearning as an ELearning independent from location, time or space. A good method of changing the framework can be the storing small contents in XML structures this guarantees the quick and effective page generation and the structural relations.

KLIMEŠ, C.
Expert System Utilization for Modeling the Decision Making Processes upon Indetermination [full paper]
Computer aided modeling of the decision making processes requires the availability of a system, enabling to gather the knowledge of numerous experts. That is why the subject matter concerns first the simulation of the decision making processes, as well as the methods and procedures of knowledge acquisition from the above experts.

BENDJEBBAR, M. — ZERIKAT, M.:
Contribution to the NeuroFuzzy Control of Voltage Induction Machine Inverter Fed [full paper]
This article presents a modern strategy to improve the performance of electrical drives control. The approach used consists of combining both fuzzy and neural control algorithms to make better use of the knowledge resulting from both techniques. The numerical simulation tests carried have shown that the techniques robustness are very good and the obtained results validate the proposed neurofuzzy control diagram taking into account the induction motor model complexity due to high non linearity presence.

KOLLÁR, M.:
Evaluation of Real Call Set up Success Rate in GSM [full paper]
The Call Set up Success Rate is one of the most important Key performance Indicators (KPIs) used by all mobile operators. However there is no standard measurement possible for this parameter. Therefore the different operators can measure it differently. In this paper, a definition of a real Call Set up Success Rate, possibility of its implementation using the current technologies in GSM and difference between the real and implemented Call Set up Success rate is provided. The “real” in this case means that Call Set up Success Rate is calculated as ratio of the assigned TCHs to the channel requests. The error in measurement of real Call Set up Success Rate with activated Direct TCH Assignment feature is evaluated as well. The proposed error modeling can be used in order to guarantee a quality in measurement of Call Set up Success Rate.

HAMOUDA, M. — FLAZI, S.:
Study of the Pollution Resistance in Front of the Flashover Discharge on a Disk Model [full paper]
In this paper the pollution resistance before the foot of the discharge, and the geometrical form of the leakage current lines, during the evolution of the discharge until flashover, is very important for the modelling of this phenomenon on a real insulator, and for the determination of its critical conditions. To study this problems, we have achieves a new model of laboratory. This model looks like a real insulator of electric lines in his shape and also in his pollution. The suggested model is valid to act well as gobetween the real insulator and simple laboratory models which have carefully studied. In this paper we present our model with its characteristics and the experimental results of its use for measuring the critical voltage and the pollution resistances between the ground electrode and a static discharge for many discharge positions.

CHOCHLÍK, M.:
Storing Dimensions and Units of Physical Quantities in a Relational Database [full paper]
Many relational databases store records with columns containing various physical properties of the stored items. However when using these data, the dimension and unit checking is often left to the application logic. In physical calculations the individual terms represent various quantities both those having dimensions and dimensionless. Furthermore the values can be expressed in various units. The dimensions and units are important as a type system that is ensuring correctness and provide information about the meaning of the terms and results of the calculations. This paper presents the design of a working implementation of a subsystem representing physical quantities and units in the PostgreSQL database system.

MIŠÁK, M.:
Mathematical Model of Electric Arc Respecting Mayr Theory in EMTPATP [full paper]
The mathematical interpretation of an electric arc is practically very difficult by virtue of its extremely accidental character. But on the other side, the mathematical formulation course of the electric arc is possible with transfer to the area of the mathematical modeling for specific conditions. Limits of influences of the electric arc are possible to determine with using results from mathematical simulations. The mathematical model of the electric arc defined at simulation program EMTPATP and respecting Mayr theory is introduced within this paper. Results from simulations defining the influence of the electric arc on the medium voltage system are introduced within paper too.
