VOLUME 8, 2011
CONTENTS
Mathematics
Meline Aprahamian .................................................................................................................. 7
Mean Value Theorems
in Discrete Calculus
Antoaneta Mihova .................................................................................................................... 13
Polynomial Identities of the 2x2 Matrices over the
Finite Dimensional Grassmann Algebra
Veselina Evtimova ................................................................................................................... 19
Analysis of the Impact of the
Incoming Calls Flow Intensity on Some Basic
Characteristics
Veselina Evtimova ................................................................................................................... 25
A
Study on the Influence of Incoming Calls Flow Intensity on the Waiting
Time Characteristics
of an Emergency Medical Aid Centre
Ivanka Angelova ...................................................................................................................... 31
Numerical Solution of the Two-Phase Stefan Problem for Sphere
Ivanka Angelova....................................................................................................................... 38
Mathematical Models of Interface Problems for Steady-Unsteady
Heat Conduction
Informatics
Valentin Velikov ....................................................................................................................... 44
Some Possibilities For Automatic Programs Generation
Margarita Teodosieva .............................................................................................................. 50
Information System for Medicines
Mihail Iliev................................................................................................................................. 55
Extending the Lifetime of Wireless Sensor Networks by Using
a Modified Method for
Hierarchical
Organization of the System in Clusters
with Unequal Number of Devices
Georgi Krastev, Tsvetozar Georgiev....................................................................................... 63
One Approach for Continuous
Signals Representation
Viktoria Rashkova.................................................................................................................... 70
Design and Implementation
of Knowledge Control Test System
Physics
Galina Krumova........................................................................................................................ 77
Calculations of Light, Medium and
Heavy Neutron-Rich Nuclei Characteristics
Vladimir Voinov, Roza
Voinova ............................................................................................... 86
Calculation of the Characteristic Impedance of a Microstrip, Reversed Microstrip and
Galina Krumova........................................................................................................................ 93
Some Problems of Atomic and Nuclear Physics
Teaching
Tsanko Karadzhov, Nikolay Angelov....................................................................................... 101
Determining the Lateral Oscilations
Natural Frequency of a Beam Fixed at
One End
Education
Plamenka Hristova, Neli Maneva............................................................................................ 106
An Innovative
Approach to Informatics Training for Children
Margarita Teodosieva .............................................................................................................. 114
Using Web Based Technologies on Training in
XHTML
Desislava Atanasova, Plamenka Hristova ............................................................................. 120
Human Computer
Iteraction in Computer Science Education
Valentina Voinohovska ............................................................................................................ 125
Computer – based conceptual mapping for facilitation
of creative and meaningful learning in
the course of “Multimedia Systems and technologies”
Galina Atanasova, Katalina Grigorova .................................................................................... 132
An Educational Tool for Novice Programmers
Valentina Voinohovska ............................................................................................................ 139
A Course for Promoting Student’s
Visual Literacy
Magdalena Metodieva Petkova ............................................................................................... 145
Teaching and Learning
Mathematics Based on Geogebra Usage
Participation
in International Projects
Nadezhda Nancheva................................................................................................................ 153
Mosem 2 Project - Learning Electromagnetic Phenomena and Superconductivity
by Integration
of Data Acquisition,
Data Video, Modelling, Simulation and Animation