CONTENTS

Neycheva, T., T. Stoyanov, V. Krasteva, I. Iliev, S. Tabakov, V.  Tsibulko, I. Jekova, High-resolution Signal Acquisition ModuleRecording 18-Lead ECG for Person Authentication	1
Petrova, G., Applications of е-Health Standards in Personalized Healthcare Systems	5
Krasteva, V., I. Jekova, R. Abächerli, Analysis of QRS Patterns in 15-Lead ECG for Person Verification	10
Dobrev, D., T. Neycheva, Adaptive Incremental Estimation Filter for AC Noise in the Electrocardiogram	14
Dobrev, D., T. Neycheva, Software PLL for Power-line Interference Synchronization: Implementation and Results	18
Stoev, V., Overview of Photoacoustic Imaging in the Medical Diagnostics Field	22
Feradov, F., T. Ganchev, Ranking of EEG Time-domain Features on the Negative Emotions Recognition Task	26
Stanchev, O., Simulation Model of PVDF Piezoelectric Transformer for Medical Applications	30
Manolov, E., Graphical Representations for Analog IC Design in Deep and Ultra-Deep Submicron CMOS	34
Georgiev, G., E. Manolov, Comparison between Different Schematic Solutions to Achieve Constant-gm in Fully Differential Operational Amplifiers	38
Kostadinov, S., I. Uzunov, D. Gaydazhiev, E. Manolov, Design Considerations for Current Mode Amplifier in Deep Sub-micron CMOS Technology	42
Tanev, A., I. Uzunov, S. Ouzounov, M. Hristov, Computer Investigation of CMOS Operational Transconductance Amplifier (OTA) with Improved Linearity Implemented on AMS 0.35 μm Process	46
Gaydazhiev, D., Acoustic Dispersion Analysis of the Resonant Modes in FBAR	50
Rusev, R., Transient Analysis of Electronic Circuit Derived from the Active Site β-lactamase Hydrogen Bonding Network	53
Vasileva, T., V Tchoumatchenko, M. Manoeva, Cloud Computing in Collaborative Learning in Electronics	57
Stefanova, S., R. Gercheva, Application of Trialogical Design Principles to Practical Education in Networking Technologies	61
Tchoumatchenko, V., Analyzing Collaborative Artefacts in Project Based Courses	66
Tchoumatchenko, V., Web Based Tool for State Machines Design	69
Maradzhiev, I., Ts. Grigorova, S. Ivanov, Teaching Stepper Motors and Brushed DC Motors Using the Medium Voltage Digital Motor Control Platform, Part I - Stepper Motors Control	72
Grigorova, T., Teaching Stepper Motors and Brushed DC Motors Using the Medium Voltage Digital Motor Control Platform, Part II - Brushed DC Motors Control	76
Petkov, R., Comparing Validation of Self-acquired Learning in the ICT Company Sector and in VET Schools/centers in Bulgaria	80
Hranov, T., N. Hinov, Using Logisim Digital Circuit Simulator for Examining Power Electronics Digital Control Systems	84
Shehova, D., Software Environments Applicable in Teaching Analog and Mixed Signals Circuits Design	88
Chekichev, A., D. Shehova, V. Raydovska, Zl. Hunev, Computer Modeling of Transmitter of a Digital Communication System	92
Lyubomirov, S., M. Nedeva, M. Bundeva, I. Uzunov, Software Management of 3D Printer	96
Lyubomirov, S., V. Raydovska, A. Chekichev, M. Nedeva, Software Platform for Security Alarm System	100
Cordemans, P., N. Witte, J. Vankeirsbilck, W. Melis, J. Boydens, Isolating Real-time from Processor-intensive Processes in Embedded Multi-core Systems	104
Vankeirsbilck, J., H. Hallez, J. Boydens, Integration of Soft Errors in Functional Safety: A Conceptual Study	108
Badarov, D., G. Mihov, Mains Frequency Deviation Measurement by Using Elements of the Subtraction Procedure Based on Xilinx FPGA	112
Petrova, G., G. Spasov, G. Pazhev, Realization of a Home Automation Network with Two Gateways Based on Open Source Hardware	116
Bogdanov, L., R. Ivanov, Power Management in Embedded Systems: A Static Power Approach	120
Shopov, M., Practical Implementations of Cloud Computing Technologies for Smart Metering in Electrical Power Systems	124
Spasova, V., I. Iliev, Performance Evaluation of AES Symmetric Key Encryption Modes in an Ambient Assisted Living System	128
Buliev, I., T. Grigorov, J. Kolev, Blended Approach in the Embedded Software Design	131
Kokolanski, Z., F. Reverter, C. Gavrovski, V. Dimcev, Improving the Resolution in Direct Inductive Sensor-to-Microcontroller Interface	135
Srbinovska, M., Z. Kokolanski, C. Gavrovski, V. Dimcev, Loss of Load Probability in Wireless Sensor Networks using Solar Cells	139
Yakimov, P., N. Tuliev, Electric Power Transducers with Networking Capabilities	143
Yakimov, P., A. Iovev, N. Tuliev, Smart Transducers Network Development Using PLC as a Gateway	147
Nikolov, G., B. Nikolova, E. Gieva, LabVIEW Based Wireless System for Environmental Monitoring	151
Marinov, M., G. Nikolov, B. Ganev, Wireless Sensor Network-based Illumination Control	155
Djermanova, N., M. Marinov, B. Ganev, Alternating Current-Driven Strain-gage Bridge Amplifier System for Brushless Motors Torque Measurement	159
Djermanova, N., J. Kiss’ovski, V. Vachkov, Y. Todorov, D. Damyanov, Investigations on Impedance Behaviour of Microwave-Plasma at Atmospheric Pressure	163
Djamiykov, T., K. Asparuhova, I. Spasov, Sun Tracking Sensor with Current Loop Output	167
Iliev, D., V. Gourev, M. Mitev, Design of Adaptive Weather Station with Reduced Power Consumption	171
Siderov, V., P. Georgiev, I. Zhivkov, G. Dobrikov, R. Yordanov, M. Vala, M. Weiter, Measurement of Organic Solar Cell Parameters	175
Melikyan, V., V. Galstyan, Design of High-efficiency Dual-ratio Step-down Switched Capacitor Converter with Full Digital Feedback Control	178
Durgaryan, A., A. Balabanyan, V. Melikyan, Fully Integrated Low Power Temperature Measurement Circuit Design in 28nm Process	182
Rusev, R., G. Angelov, E. Gieva, B. Atanasov, M. Hristov, Green Fluorescent Protein Hydrogen Bonds Compared to Microelectronic Devices	186
Spasova, M., G. Angelov, D. Nikolov, M. Hristov, Impact of Energy Band Structure on CNTFET Output Characteristics	189
Brusev, T., Investigation of Colpitts VCO Designed on 0.35 μm Technology	193
Brusev, T., R. Radonov, Layout Design of Switching-mode Amplifier for LTE Applications	197
Barzinska, V., Automotive Industry Trends and Effects over Analog Circuit Design	201
Vakrilov, N., A. Stoynova, Implementation of DOE in the Heat Sink Design for LED Application	204
Spasov, G., Coincidence of the Electron and Ion Beams at Auger Profiling in Microelectronics	208
Spasov, G., Electron Probe Microanalyses in Auger Electron Spectroscopy	212
Nedyalkov, I., D. Arnaudov, N. Hinov, Studying of Converter for Charging and Management of Energy Flows in Photovoltaic System	216
Penev, D., N. Hinov, T. Hranov, Control of Induction Heating Power Converter for Ferromagnetic Materials Melting	220
Vuchev, S., G. Kunov, D. Arnaudov, LabVIEW Virtual Instrument for Modeling and Control of Three-Phase BUCK Rectifier with Sinusoidal PWM	224
Bankov, N., A. Vuchev, S. Vuchev, An Analysis of a Bidirectional Series Resonant DC/DC Converter	228
Hinov, N., N. Rangelov, Buck ZVS DC-DC Quasi-Resonant Converter: Design, Modeling, Simulation and Experimentation	232
Dimitrov, V., P. Goranov, Driving System for Electric Vehicles: Modelling and Simulation	238
Spirov, D., N. Komitov, Analysis and Design of the Parallel Quasi Resonant DC Link Converter for Induction Motor Drive Application	242
Maradzhiev, I., D. Ognyanova, Evaluation of the Used PWM Techniques in the Control of Brushless DC Motors	246
Mitev, G., S. Sarieva-Jordanova, M. Mitev, Enhanced Read-Out System for RADFET Dosimeters Research	250
Gyoch, B., Light Extraction Improvement of LED Packages	254
Mashkov, P., B. Gyoch, K. Asparuhova, H. Beloev, R. Kandilarov, LED Lamp for Application in Horticulture	258
Mashkov, P., B. Gyoch, T. Pencheva, H. Beloev, R. Kandilarov, Energy Effective LED Module for Poultry Lighting	262
Lazarov, T., Dependencies between Basic Timing Parameters in Image Processing System	266
Deneva, M., New Two-wavelength, Transversally Laser- pumped Laser with Improved Spatial Structure	270
Minkov, D., Features of Electro-magnetic Methods for Evaluating Sizes of Surface Cracks in Metals	274
Nikolaeva, D., V. Bozhikova, Approaches to Increasing the Quality and Reliability in the Field of Design Patterns	278
Taherkhani, R., A. Heidary, G. Wang, G. C. M. Meijer, A Low-power CMOS Pull-up Circuit	282

 INDEX

Abächerli	Roger		p10
Angelov	George	Vasilev	p186, 189
Arnaudov	Dimitar	Damyanov	p216, 224
Asparuhova	Katya	Konstantinova	p167, 258
Atanasov	Boris	Petkov	p186
Badarov	Dimiter	Hristov	p112
Balabanyan	Abraham	Henri	p182
Bankov	Nikolay	Dimitrov	p228
Barzinska	Vesselina	Atanasova	p201
Beloev	Hristo	Ivanov	p258, 262
Bogdanov	Lubomir	Valeriev	p120
Boydens	Jeroen		p104, 108
Bozhikova	Violeta	Todorova	p278
Brusev	Tihomir	Sashev	p193, 197
Buliev	Ivan	Georgiev	p131
Bundeva	Milena	Krasimirova	p96
Chekichev	Angel	Hristov	p92, 100
Cordemans	Piet		p104
Damyanov	Desislav	Stilijanov	p163
Deneva	Margarita	Angelova	p270
De Witte	Nico		p104
Dimcev	Vladimir		p135, 139
Dimitrov	Vladimir	Vladimirov	p238
Djamiykov	Todor	Stoyanov	p167
Djermanova	Nina	Jetchkova	p159, 163
Dobrev	Dobromir	Petkov	p14, 18
Dobrikov	Georgi	Hristov	p175
Durgaryan	Armen	Aleksandr	p182
Feradov	Firgan	Nihatov	p26
Galstyan	Vache	Ashot	p178
Ganchev	Todor	Dimitrov	p26
Ganev	Borislav	Todorov	p155, 159
Gavrovski	Cvetan		p135, 139
Gaydazhiev	Dobromir	Georgiev	p42, 50
Georgiev	Georgi	Ognyanov	p34, 38
Georgiev	Petar	Georgiev	p175
Gercheva	Radostina	Stefanova	p61
Gieva	Elitsa	Emilova	p151, 155, 186
Goranov	Peter	Trifonov	p238
Gourev	Vassil	Nikolov	p171
Grigorov	Teodor	Borislavov	p131
Grigorova	Tsvetana	Grigorova	p72, 76
Gyoch	Berkant	Seydali	p254, 258, 262
Hallez	Hans		p108
Heidary	Ali		p282
Hinov	Nikolay	Lyuboslavov	p84, 216, 220, 232
Hranov	Tsveti	Hristov	p84, 220
Hristov	Marin	Hristov	p46, 186, 189
Hunev	Zlatin	Ilkov	p92
Iliev	Dian	Milchev	p171
Iliev	Ivo	Tsvetanov	p1, 128
Iovev	Atanas	Nikolov	p147
Ivanov	Racho	Marinov	p120
Ivanov	Svetoslav	Tsvetanov	p72
Jekova	Irena	Ilieva	p1, 10
Kandilarov	Rostislav	Yuriev	p258, 262
Kiss’ovski	Jivko	Gospodinov	p163
Kokolanski	Zivko		p135, 139
Kolev	Jordan	Nikolov	p131
Komitov	Nikolay	Georgiev	p242
Kostadinov	Simeon	Dimitrov	p42
Krasteva	Vessela	Tzvetanova	p1, 10
Kunov	Georgi	Tzvetanov	p224
Lazarov	Tsvetomir	Nikolov	p266
Lyubomirov	Slavi	Yasenov	p96, 100
Manoeva	Mariana	Dimitrova	p57
Manolov	Emil	Dimitrov	p34, 38, 42
Maradzhiev	Ivan	Petrov	p72, 246
Marinov	Marin	Berov	p155, 159
Mashkov	Petko	Hristov	p258, 262
Meijer	Gerard	C. M.	p282
Melikyan	Vazgen	Shavarsh	p178, 182
Melis	Willem		p104
Mihov	Georgy	Slavchev	p112
Minkov	Dorian	Asenov	P274
Mitev	Georgi	Mitev	p250
Mitev	Mityo	Georgiev	p171, 250
Nedyalkov	Ivan	Ivanov	p216
Nedeva	Milena	Ilcheva	p96, 100
Neycheva	Tatyana	Dimitrova	p1, 14, 18
Nikolaeva	Dimitrichka	Zheleva	p278
Nikolov	Dimitar	Nikolov	p189
Nikolov	Georgi	Todorov	p151, 155
Nikolova	Boyanka	Marinova	p151
Ognyanova	Dilyana	Marinova	p246
Ouzounov	Sotir		p46
Pazhev	Georgi	Aleksandrov	p116
Pencheva	Tamara	Grigorievna	p262
Penev	Dimitar	Nikolov	p220
Petkov	Rosen	Kirtchev	p80
Petrova	Galidiya	Ivanova	p5, 116
Radonov	Rossen	Ivanov	p197
Rangelov	Nikolay	Rangelov	p232
Raydovska	Velislava	Hristova	p92, 100
Reverter	Ferran		p135
Rusev	Rostislav	Pavlov	p53, 186
Sarieva-Jordanova	Snejana		p250
Shehova	Daniela	Antonova	p88, 92
Shopov	Mitko	Petrov	p124
Siderov	Vasil	Jivkov	p175
Spasov	Georgi	Spasov	p208, 212
Spasov	Grisha	Valentinov	p116
Spasov	Ivan	Slavov	p167
Spasova	Mariya	Lyubomirova	p189
Spasova	Velislava	Grishina	p128
Spirov	Dimitar	Stoilov	p242
Srbinovska	Mare		p139
Stanchev	Orlin	Plamenov	p30
Stefanova	Stela	Angelova	p61
Stoev	Viktor	Ventsislavov	p22
Stoyanov	Todor	Venkov	p1
Stoynova	Anna	Vladova	p204
Tabakov	Serafim	Dimitrov	p1
Taherkhani	Reza		p282
Tanev	Atanas		p46
Tchoumatchenko	Vassiliy	Platonovich	p57, 66, 69
Todorov	Yanko	Iliev	p163
Tsibulko	Valentin	Viktorovich	p1
Tuliev	Nikolay	Todorov	p143, 147
Uzunov	Ivan	Stefanof	p42, 46
Uzunov	Ivaylo	Detelinov	p96
Vachkov	Vassil	Atanasov	p163
Vakrilov	Nikolay	Vakrilov	p204
Vala	Martin		p175
Vankeirsbilck	Jens		p104, 108
Vasileva	Tania	Krumova	p57
Vuchev	Aleksandar	Stoyanov	p228
Vuchev	Stoyan	Aleksandrov	p224, 228
Wang	Guijie		p282
Weiter	Martin		p175
Yakimov	Peter	Ivanov	p143, 147
Yordanov	Rumen	Stoyanov	p175
Zhivkov	Ivaylo	Tzankov	p175