International Journal of Circuits, Systems and Signal Processing


ISSN: 1998-4464
Volume 9, 2015

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of NAUN Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

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Volume 9, 2015


Title of the Paper: Integration of INS and GPS System Using Particle Filter Based on Particle Swarm Optimization

 

Authors: Meriem Jgouta, Benayad Nsiri

Pages: 461-466

Abstract: The localization performance of a navigation system can be enhanced by combining different types of sensors. This paper focuses on INS-GPS integration. INS and GPS measurements permit to identify a non-linear state area model suitable to particle filtering. The GPS/INS combination is carried out by a nonlinear filtering approach by which GPS measurements are used to put INS estimates right. Nevertheless, a conventional particle filter is bound to deviate due to the dynamics of the unknown parameters. Leading particles move to the most favorable position by using particle swarm optimization algorithm, therefore the number of active particles was augmented, the particle variety was enhanced, and the particle degradation was precluded. Simulation results show that the new algorithm enhanced the estimation precision considerably compare with the conventional particle filter.


Title of the Paper: Stability Analysis of Discrete Predictive Sliding Mode Control for Multivariable Systems

 

Authors: Houda Ben Mansour, Khadija Dehri, Ahmed Said Nouri

Pages: 452-460

Abstract: Predictive sliding mode controller have been succefully implemented in the last 10 years overcoming the drawbacks of the traditional sliding mode control and the generalized predictive control strategies. This paper investigates the stability analysis of the new Discrete Predictive Sliding Mode Controller (DPSMC) for multivariable systems. The basic objective of the controller is to approximate the predictive sliding function vector Sp MIMO to the sliding reference function vector Sr MIMO, penalizing at the same time the variation in the control signal. The designed control strategy is more robust and has a chattering reduction property and a faster convergence on the system state. Finally, a numerical example is given to illustrate the effectiveness of the proposed control, in comparaison with the classical sliding mode control.


Title of the Paper: Cochlear Model Based Enhancement of Noisy Speech Signals

 

Authors: Mladen Russo, Maja Stella, Maroje Kurajica

Pages: 446-451

Abstract: Many noise reduction techniques were developed over the past decades and noise reduction is still a major problem in many applications. Although reducing noise, these algorithms typically introduce some distortion to speech signal. Humans are quite capable of detecting speech in background noise, so we propose a method for noise reduction based on the model of cochlear processing of speech signals. Using our model of signal reconstruction from the cochlear output we have achieved improvement in speech quality. Our experiments show that the proposed approach performs better than several other noise reduction methods.


Title of the Paper: Incorporating Views on Market Dynamics in Options Hedging

 

Authors: Antoine E. Zambelli

Pages: 440-445

Abstract: We examine the possibility of incorporating information or views of market movements during the holding period of a portfolio, in the hedging of European options with respect to the underlying. Given a fixed holding period interval, we explore whether it is possible to adjust the number of shares needed to effectively hedge our position to account for views on market dynamics from present until the end of our interval, to account for the timedependence of the options’ sensitivity to the underlying. We derive an analytical expression for the number of shares needed by adjusting the standard Black-Scholes-Merton quantity, in the case of an arbitrary process for implied volatility, and we present numerical results.


Title of the Paper: Convertor of Ionizing Radiation into Electric Power Based on the Synthetic Diamond

 

Authors: N. B. Rodionov, V. N. Amosov, S. A. Meshchaninov, R. N. Rodionov, A. F. Pal, A. G. Trapeznikov

Pages: 435-439

Abstract: Converter of ionizing radiation into electrical power based on the synthetic diamond has been studied. p-i-structure is a IIa-type diamond CVD film with 50 mkm thickness deposited on p-type HPHT-diamond substrate heavily doped with boron. Au, Pt or Al metal contacts were deposited on the surfaces of the structure. The technology of semitransparent contact fabrication was used to manufacture semitransparent entrance window of convertor. Current-voltage characteristics of photoelectric convertor of alpha-, X-ray, UV-radiations were examined. Comparison of current-voltage characteristics of p-i-structures with solid and semi-transparent contacts made of Pt, Au or Al has been performed. Obtained experimental data allowed to estimate efficiency of ionizing radiation conversion into electrical power. Conversion efficiency for alpha-, x-ray and UV radiation were 5,9%, 8,6% and 22 %, respectively.


Title of the Paper: Robust Stabilization of Interval Plants by Means of Two Feedback Controllers

 

Authors: Radek Matušů

Pages: 427-434

Abstract: The main aim of this paper is to present an approach for robust stabilization of interval plants by means of closed-loop control systems with two feedback controllers. The control synthesis is based on the polynomial technique and subsequent graphical robust stability analysis utilizes the combination of the value set concept with the zero exclusion condition. The presented set of examples for second and third order interval plants illustrates design and tuning of various controllers and elucidates investigation of robust stability through the graphical tests. Finally, the obtained results are confirmed by the control simulations.


Title of the Paper: On-Line Key Frame Extraction and Video Boundary Detection Using Mixed Scales Wavelets and SVD

 

Authors: Assma Azeroual, Karim Afdel, Mohamed El Hajji, Hassan Douzi

Pages: 420-426

Abstract: A video is a set of successive frames (images), one minute of a video stream can contain 1500 frames, but just some of them are the most representative, these frames are called key frames. The huge number of video frames requires a high computational cost on time and memory. Hence it’s necessary to find new techniques to improve the video processing like video indexing, video retrieval and video summary especially when the real-time computing is required. In this context, this paper proposes a novel technique to extract key frames and detect video boundary based on dominants blocks of Faber-Schauder wavelet coefficients in mixed scales representation and Singular Value Decomposition (SVD). The reason behind using dominants blocks is that local features like contours or edges are unique to each frame, thus, they can act as a signature of the frame. These contours and its near textures contain an important concentration of dominant coefficients which are used to select the dominant blocks. Any substantial change in a video frame will result in a change of their edges and the neighboring textures of these edges, therefore an important change in the dominants blocks. Then this frame is considered as a key frame and represent the beginning of a new shot. The dominant blocks of every frame are computed, then feature vectors are extracted from the dominant blocks image of each frame and arranged in a feature matrix. After that, Singular Value Decomposition is used to calculate sliding windows ranks of those matrices. At the end, the computed ranks are traced to extract key frames of a video. The experimental results indicate that the proposed method is robust against a large range of digital effects used during shot transition and detect effectively the video shots and key frames.


Title of the Paper: A Fuzzy–Logic Based Controller for Three Phase PWM Rectifier with Voltage Oriented Control Strategy

 

Authors: A. Fekik, H. Denoun, N. Benamrouche, N. Benyahia, M. Zaouia

Pages: 412-419

Abstract: This paper presents a control strategie for a pulse with modulation (PWM) rectifier. This strategy is a voltage oriented control (VOC) which originates from field oriented control (FOC) for the induction motor, it provides a fast dynamic response since the current control loop is applied. This strategy is used to eliminate harmonic current and consequently to reduce the total harmonic distortion (THD) of the line current and improve the power factor while maintaining the DC-voltage at the required level. A classical PI controller and a FUZZY Logic Controller are used to regulate the dc bus voltage. A digital simulation in Matlab /Simulink/ SimPower System and Fuzzy logic toolbox is carried out. The steady state and dynamic result illustrating the operation and performance of the proposed control scheme are presented, consequently, it was confirmed that the novel VOC is much better than the classical one.


Title of the Paper: Continuous-Time and Discrete Multivariable 2DOF Controllers

 

Authors: Marek Kubalcik, Vladimír Bobal

Pages: 403-411

Abstract: The paper presents a design and implementation of a 2DOF (two degree of freedom) multivariable controller. The controller was designed in both discrete and continuous-time versions. The control algorithm is based on polynomial theory and pole – placement. The controller integrates an on – line identification of an ARX model of a controlled system and a control synthesis on the basis of the identified parameters. The model parameters are recursively estimated using the recursive least squares method. In case of the continuous-time control loop derivatives of the input and output variables of the continuous – time systems can not be directly measured. Therefore differential filters and filtered variables are established to substitute primary variables. The filtered variables are then used in the recursive identification procedure.


Title of the Paper: On The Lossless Compression of Multidimensional Medical Imagery

 

Authors: Raffaele Pizzolante, Bruno Carpentieri

Pages: 395-402

Abstract: Nowadays, many technologies involved for medical examinations produce multidimensional images. Such data need to be managed in an effective manner in order to be efficiently stored and transmitted. In such scenarios, data compression techniques are essential to improve the efficiency of transmission and storage. Lossless compression techniques are generally preferred, since medical images are often sensitive and important data. Indeed, through lossless compression techniques, the original data can be exactly restored. In this paper, we define a predictive structure well suited for the lossless compression of multidimensional medical images. We experimentally tested our approach on several datasets, including a dataset of 3-D Computed Tomography (CT), 3-D Magnetic Resonance (MR) and 5-D fMRI images. The experimental results we achieved outperform other state-of-the-art approaches for 3-D medical images.


Title of the Paper: Robustness of Control Time-Delay Processes in Term of Influence Parametric Uncertainties

 

Authors: V. Bobál, P. Dostál, M. Kubalčík

Pages: 386-394

Abstract: This paper deals with a design of a universal and robust digital control algorithms for control of great deal processes with time-delay. Time-delays are mainly caused by the time required to transport mass, energy or information, but they can also be caused by processing time or accumulation. Typical examples of such processes are e.g. pumps, liquid storing tanks, distillation columns or some types of chemical reactors. The designed control algorithms are realized using the digital Smith Predictor (SP) based on polynomial approach – by minimization of the Linear Quadratic (LQ) criterion. For minimization of the LQ criterion is used spectral factorization principle with application of the MATLAB Polynomial Toolbox. The designed polynomial digital Smith Predictors were verified in simulation conditions. The main contribution of this paper is an experimental simulation examination of the robustness of the designed control algorithms. The robustness designed control algorithms was examined in term of influence parametric uncertainties – caused by variance of a static gain of the process model. The program system MATLAB/SIMULINK was used for these purposes.


Title of the Paper: Flood Response Process Knowledge of Lower Sava Valley Communities in Slovenia

 

Authors: Jernej Agrež, Nadja Damij

Pages: 373-385

Abstract: This paper focuses on the learning process of the flood-endangered communities in the Lower Sava Valley in Slovenia. In past five years, the communities faced several floods, which occurred because of the rain in central and northeast parts of Slovenia. Floods differed by their severity. On the first hand, the least harming caused only higher water levels of the major rivers, which cause isolation of couple of households. On the other hand, the most harming floods caused roadblocks, flooding the entire areas and communities. Hydrological and meteorological data, describing river dynamics and rainfall was gathered from the Slovenian Environment Agency database, while data describing the severity of the flood events from the Administration for Civil Protection and Disaster Relief database. To be able to simulate and assess floods` characteristics, we combined all gathered data into the singled database with the timeline of the flood events. We used data mining, process modeling and statistical methods to build up the simulation model, to compare simulation output with the real world data and to finally evaluate community learning process. Through the past floods, communities had the opportunity to learn about flood characteristics, how to properly react and protect the endangered property. We identified emerged tacit knowledge, which made possible some communities to reduce flood risk. We conducted preliminary semi-structured interviews with people who live in the flood-endangered areas to get the insight on the perception of the floods. Further, we designed fuzzy knowledge assessment system to evaluate which of the communities demonstrated the highest learning experience. We identified influence of the community knowledge on the response process and further try to optimize learning model, with the measures, extracted from the national strategic defense documents. The improved model revealed much higher self-reliance and flood resilience of the communities, when they are provided with more systematic learning about the floods and counter flood measures. Consequently, the whole flood response process workload significantly reduced according to the higher ability of the communities to resolve flood situation with no additional external support.


Title of the Paper: Research on Feature Extraction and Classification of Ultrasonic Flaw

 

Authors: Hongjia Chen, Hui Liu, Xiaoyan Wang, Yanping Bai

Pages: 362-372

Abstract: By the laser ultrasonic surface wave surface defect detection experiments, we got reflected ultrasonic and the transmitted wave signals in different width and depth cases. Our purpose is to classify the ultrasonic defect signals and search for a way can identify 5 kinds of defect signals. According to non-linear, non-stationary characteristics of ultrasonic detection signal, we use the Mel Frequency Cepstral Coefficient method (MFCC) to extract characteristic coefficients of two waveform signals, to achieve effective detection of different defect categories. We respectively dispose the features with BP neural network and NNRS model. In our experiment, we compare the training and classification of BP neural network to the improved BP neural network with additional momentum. The experiments show that the neural network can recognize defect signals categories. But BP neural network only suit to small simples test. Then we use NNRS model because it is fit for a large number of samples. The result is famous, the recognition rate of two waves over 90%, and the diagnostic accuracies are both 100%. NNRS is more precise and practical.


Title of the Paper: Possible Way of Control of Heat Output in Hotwater Piping System of District Heating

 

Authors: Pavel Navratil, Libor Pekar, Jindrich Klapka

Pages: 353-361

Abstract: The paper deals with the description possible method of control of a heat output in district heating systems. This control method is called qualitative-quantitative control method of heat output with utilization of prediction of daily diagram of heat supply in hot-water piping systems of district heating. The control method consists in simultaneous and continuous acting of two variables influencing the transferred heat output and in using the prediction of required heat output in a specific locality. The control method should enable elimination of the influence of transport delay between the heat source and heat consumption of individual relatively concentrated consumers. Transport delay can be in the range up to several hours and depends on the length of feeder piping, which can be up to several kilometers, and on the flow speed of heat transfer medium.


Title of the Paper: Position Control of the Thomson’s Ring System Using Fractional Operators

 

Authors: Manuel A. Duarte-Mermoud, Norelys Aguila-Camacho, Rafael Castro-Linares

Pages: 344-352

Abstract: The position control of a magnetic levitation system, known as Thomson’s ring, is studied in this paper. The design and implementation of three control strategies are presented; the first corresponds to a pole placement control (PPC), the second is a fractional order proportional integral derivative (FOPID) control and the third consists of a sliding mode control (SMC). In all three cases, a fractional order observer is used to estimate the ring speed. A particle swarm optimization (PSO) technique was used in the case of the FOPID control, in order to select the optimal parameters of the controller. Stabilization and tracking experiments are carried out in order to observe the behavior of the controlled system. Also, the effect of external disturbances on the output of the system is addressed.


Title of the Paper: Robust Off-Line PSS Automated Control Design Based H∞ - Loop Shaping Optimization

 

Authors: A. Derrar, A. Naceri, D. Ghouraf

Pages: 336-343

Abstract: This article presents a contribution study of the advanced frequency control techniques based on off-line H? - loop shaping optimization method applied on power system stabilizer (PSS), to improve transient stability and robustness of a single machine- infinite bus system (SMIB). In this paper, the robust controller is designed and simulated under Matlab - Simulink. The robust H? based power system stabilizer (PSS-H?) is designed using the concept of loop shaping optimization using the concepts of sensitivity and complementary sensitivity, which is one of the robust control methods used for designing the controllers for dynamical systems in electrical engineering. The computer simulation results (static and dynamic stability), completed by test of robustness against machine parameters uncertainty (electric and / or mechanic variation parameters of synchronous machine), have proved that good dynamic performances, showing a stable system responses almost insensitive to large parameters variations, and more robustness using the robust off-line H?- loop shaping automated control design based Power System Stabilizer.


Title of the Paper: FPGA Enhanced Implementation of ECG QRS Complex Detection Algorithm

 

Authors: Sahel Alouneh, Mohammad Al-Shayeji, Sa’ed Abed, M. D. Samrajesh, Sari Sultan

Pages: 327-335

Abstract: Heart disease is one of the leaders in fatal diseases. Detecting disease in rudimentary stages leads to auspicious recovery rates. Analyzing the heart rate is a vital tool to detect abnormalities and malfunctions of the heart. Heart rate analyzers are used to identify the QRS complex of the Electrocardiograph ECG. Portable battery-operated ECG hardware devices has been developed in order to increase early detection? user can get real-time results without visiting the hospital, and these results can be sent remotely to the physician. These devices face many challenges such as delay, power, area, and cost in order to be used in daily life. In this paper, QRS complex design targeting FPGA has been developed, enhanced and optimized in terms of delay, power, and area, leveraging leading hardware QRS complex detection algorithm using Synopsis tool. The algorithm is downloaded on Altera’s FPGA board. The results show that our enhancements speed up the system, which is vital for real-time application. Moreover, the enhancement has succeeded in minimizing the power and the area. The design achieves the best average of 24% power reduction, 8.9% latency reduction and 10.5% area reduction compared to the original QRS algorithm. These optimizations should enhance and facilitate QRS complex on chip designs.


Title of the Paper: Detection of Parkinson Disease Using Clinical Voice Data Mining

 

Authors: Saloni, R. K. Sharma., A. K. Gupta

Pages: 320-326

Abstract: Parkinson disease is the second most common neurological disorder. Approximately 90% of people with Parkinson have speech disorders. In this paper we have classified the healthy people and Parkinson suffering people using data mining of voice features. Support vector machine is used as a classifier. The accuracy of the classifier depends on the voice features and their count. Various subsets can be prepared with the available voice features. An algorithm is proposed to select the best subset and as a result 100% accuracy is achieved. DFA (Detrended fluctuation analysis) and PPE (pitch period entropy) are the very significant features in this classification.


Title of the Paper: PID Robust Control Using Taguchi Method

 

Authors: A. Ait Yala, A. Azzedine

Pages: 314-319

Abstract: The control of FOPD (first order plus delay) systems with high normalized time (ratio of time delay and time constant) is a very hard task, especially when the system parameters are subjected to variations. A great number of physical systems show such model behavior. In process control today, proportional integral derivative (PID) (continuous and digital) controllers still predominate and are sufficient for most needs with more than 95 per cent of control loops being of the PID type. In this work, we present a method of determination of an optimal robust PID controller based on the ISE (integral squared-error), using Taguchi method. This approach is very useful when the process parameters are prone to variations in a given range. Once the criteria of optimization posed, a statistical analysis is needed to determine if the control parameters are significant or not. The design of experiments method is certainly the most appropriate to tackle this type of problem. Indeed it allowed us to quantify the weight of the factors that affect the output and evaluate their interactions. The analysis of the results led us to define the most appropriate set up that minimizes the negative effect of noise factors.


Title of the Paper: Setting a Method of Determination of “Fire for Effect” Firing Data and Conversion of the METCM into the METEO-11

 

Authors: Martin Blaha, Karel Šilinger

Pages: 306-313

Abstract: This paper is focused on setting a method of determination of Fire for Effect firing data in the perspective of automated artillery fire support control system and deals with a proposed method of conversion of the METCM meteorological message into the METEO-11 format. This method is designed for artillery of these armies that are using the METEO-11 meteorological message during a spare (manual) method of firing data calculation. Artillery units of the Army of the Czech Republic, reflecting the current global security neighborhood, can be used outside the Czech Republic. The paper presents problems in the process of complete preparation, from results arising from creating a fictional auxiliary target; by using an adjustment gun; Abridged preparation and Simplified preparation. The paper presents problems of current Artillery communication and information system and suggests requirements of the future system.


Title of the Paper: Comparing Physiological Similarities between Fingerprints of Family Members by MorphoSmart Finger VP Scanner

 

Authors: Hana Talandova, Hana Urbancokova, Milan Adamek

Pages: 300-305

Abstract: This paper discusses the use of the scanner MorphoSmart Finger VP for comparison of the similarity between fingerprints of family members. The paper is divided into four sections. The first two sections are focused on introducing the biometrics as a complex and then explain one of the most spread biometric identification method - fingerprints. The next section describes the use of a fingerprint scanner and determining its error rate. In the last part of the paper is described an experiment which compares the similarity of the fingerprints between family members with subsequent evaluation of these results.


Title of the Paper: Design of a Flexible and Reconfigurable Frequency Selective Surface

 

Authors: In-Gon Lee, Ic-Pyo Hong

Pages: 296-299

Abstract: In this paper, a flexible and reconfigurable frequency selective surface (FSS) using varactor diodes was designed and fabricated on flexible printed circuit board for curved surface application. We designed the rhombus-type patch and grid array, which is a novel type of unit cell structure, to increase the sensitivity of the capacitance for high-frequency operation. We fabricated the proposed reconfigurable FSS using a flexible printed circuit board and varactor diode using the optimized design parameters from commercial electromagnetic software simulations. To show the validity of simulation results, we measured the transmission characteristics for different bias voltages and curvature radii of the surface using free-space measurement method. The measurement results show that the proposed structure has a wideband operating frequency of 6.05-7.08 GHz for normal incidence and the proposed structure can be applied to curved surfaces like curved radomes.


Title of the Paper: Comparison between SWCNT Interconnects and Copper Interconnects for GSI and TSI Integrated Circuits

 

Authors: C. P. S. M. Nogueira, J. G. Guimarães

Pages: 289-295

Abstract: Carbon nanotubes are an extremely attractive option as interconnects for giga (GSI) and tera (TSI) scaled integrated circuits. They are promising candidates to replace copper interconnects. This paper presents a study of single-walled carbon nanotubes (SWCNTs) and copper as interconnects. The circuit model is presented and a comparison between isolated SWCNT and SWCNT bundle at different lengths is studied, analyzing their frequency, attenuation and delay time. For this purpose, the interconnects were simulated using the LTSpice software.


Title of the Paper: Stator Flux Control by Active Disturbance Rejection Control for DFIG Wind Turbine During Voltage Dip

 

Authors: R. Chakib, M. Cherkaoui, A. Essadki

Pages: 281-288

Abstract: In this paper, we propose a control strategy based on the control loops of ADRC (Active Disturbance Rejection Control) to allow a wind system based on a DFIG (Doubly Fed Induction Generator) to stay connected to the grid during voltage dip, and to resume production of electrical energy within milliseconds after the fault has disappeared. This strategy is essentially based on the control of the stator flux for maintaining the magnetization of the generator during voltage dip, and the use of a crowbar resistive circuit to protect the electronic power converters by limiting rotor currents and the DC bus voltage. The dynamic model of this wind system and the ADRC controllers are simulated in Matlab-Simulink environment.


Title of the Paper: Prospects of High-Frequency Gravimetry

 

Authors: A. L. Dmitriev

Pages: 275-280

Abstract: The gravitational field of the Earth is assumed to be a stochastic process the wide frequency spectrum of which is conditioned by the influence of various geophysical, astrophysical and anthropogenic factors. The frequency range of fluctuations of gravity field at frequencies over 1 Hz has not been significantly studied yet and still remains a peculiar ""Terra Incognita"" of gravimetry. High-frequency changes of a free fall acceleration data are informative for understanding of the complex physical processes happening in the core and crust of the Earth. They can be used to solve practical problems such as prediction of earthquakes, exploration of minerals, as well as problems of detection and identification of massive underwater or underground artifacts. The principles of new types of high-frequency gravimeters – the holographic ballistic gravimeter with the short length of a trajectory of a trial body and the ballistic gravimeter on the basis of freely falling mechanical rotor are considered.


Title of the Paper: Survey of Frequency Domain Image Watermarking Techniques

 

Authors: Petr Cika

Pages: 270-274

Abstract: Digital image watermarking methods are suitable for make a simple copyright protection on digital images. There exist a lot of digital image watermarking methods in all over the word. These methods uses spatial or transformation domain to insert for example copyright information (watermark) into original image. Mostly, frequency domain is used to watermark insertion. Especially discrete cosine transforma and discrete wavelet transform are used in many watermarking techniques. Together with these transforms also other methods, like singular value decomposition, forward error-correction codes, etc., are used to increase watermark robustness. This paper describes influence of singular value decomposition and forward errorcorrection codes, concretely on watermark robustness.


Title of the Paper: An Optimal Wireless Handover Approach of High Speed Train on CPS

 

Authors: Lan Dong, Hao Wu

Pages: 263-269

Abstract: This paper focuses on the optimization of the brand wireless handover approach of the high speed train cyber physical system. It can improve the performance of handover. The simulation results show the handover approach can reduce the frequency of handover greatly. It can reduce the handover dropping probability and outage probability to support the safety of the high speed railway communication.


Title of the Paper: Comparison of Responses of Nonlinear Circuits and Nonlinear Resonant Mediums

 

Authors: Leonid A. Rassvetalov

Pages: 258-262

Abstract: Responses of the nonlinear resonant medium represented by set oscillators are investigated. Solutions of the nonlinear equations of oscillator in the form of final Volterra series in the time and frequency domains, corresponding to anharmonicity, nonlinear excitation and nonlinear attenuation are used. Due to time-and-frequency dualism nonlinear resonant medium allows to organize calculation of integral transformations of the convolution type in frequency space with the same connectivity, as multiplication in time space. Integral transformation of input signals responses’ character is considered. Attention is paid to the duality both to the mediums under consideration and to classical nonlinear circuits.


Title of the Paper: Design and Verification of 400Hz Power Filter for Aircraft Switching Power Supply

 

Authors: Ju-Min Lee, Heon-Wook Seo, Sung-Su Ahn, Jin-Dae Kim, Woo-Hyun Kim, Ki-Jin Kwon

Pages: 253-257

Abstract: This paper introduces power filter developed for application to the switching power supply of military aircraft. 400 Hz power filter specification includes rated voltage of AC 115 V ± 10 %, 3-phase, 400 Hz and 4 A of rated current and is designed to an all-in-one structure with insulation resistance of below 0.5 Ω. The filter characteristics test results showed that it had an excellent attenuation efficiency of up to 73.66 dB in the 100 kHz ~ 30 MHz band. Furthermore, a performance verification test was performed by applying the power filter to an aircraft switching power supply to check for the inhibition of electromagnetic interference in the power unit, and the results confirmed its reliability.


Title of the Paper: Findings on System Reliability Improvements in Agile Environments

 

Authors: Lucas S. M. Lago, Marvin F. da Silva, Edison Spina

Pages: 247-252

Abstract: Software development can be considered a sociotechnical system, and the choice of practices can be viewed as the design of that system. The choice of agile practices focused on human factors can change the environment where software is developed and influence the performance of the members of the team. To evaluate the impact of the choice of five practices a questionnaire was applied to 125 developers in Brazil. These practices were related to guidelines of the Ecological Interface Design, a framework used in the design of systems with reduction of human error. The use of the guidelines was related to the increase in the perception of all the guidelines with p < 0.01. This result goes against the opinion of many experts and shows that agile practices like “daily meeting” and “quick design sessions” can be used to increase the reliability of the software developed by the team, even without the adoption of a complete agile methodology.


Title of the Paper: Measurements of Meteorological Parameter Effects on Photovoltaic Energy Production

 

Authors: Şafak Sağlam, Bülent Oral, Sertaç Görgülü

Pages: 240-246

Abstract: Photovoltaic systems (PV) use solar cells convert the sun's rays into electricity by exciting electrons in the cells using the photons of light from the sun. These conversion efficiency mainly related sun’s rays and solar cells. The conditions which are effects sun’s rays and solar cells firmly related with energy outputs of the PV systems. The energy yield is strongly associated with the weather because the electrical energy is produced directly from the solar energy. Most of the PV energy prediction models based on the meteorological parameters such as solar radiation, ambient temperature, relative humidity, wind speed, clearness index and sunshine duration. These meteorological parameters are associated with the geographical conditions where the PV systems installed. In this study, identical two photovoltaic panel systems are established in Istanbul and Kirklareli at Marmara region. Photovoltaic panel outputs and surface temperatures, solar irradiance values and meteorological parameters are measured and analyzed to find out regional differences.


Title of the Paper: Estimation of the Quality of Spot Welding Electrode Tips in Automotive Industry in Real Time Using Digital Image Processing and Image Segmentation Techniques

 

Authors: Abdulwanis Abdulhadi, Ahmed Ahtaiba

Pages: 227-239

Abstract: The image segmentation algorithm is the most challenging step and requires more computers processing power than the boundary filtering, and the Cullen et al’s method, which used the Cullen et al’s method to determine the electrodes tip width automatically in the automotive industry in real time. Spot welding is used extensively in the automotive industry. The quality of an individual spot weld is a major concern due to the heavy reliance on their use in the manufacture of motor vehicles. The main parameters that control the quality of a spot weld are current, voltage, welding force, welding time, and the quality of welding electrodes. The condition of the welding electrodes plays a major part in determining the quality of a spot weld. For example, excessive electrode wear can occur during the welding process and can cause weakening in the weld nuggets. As the number of welds increases, the electrode tip wears down and so the contact area between electrode tip and work piece increases. In order to determine the quality of the welding electrodes, a machine vision approach is employed, where images of the electrode tips in real time are captured and are processed using various image-processing algorithms. These algorithms can be used to automatically measure the electrode tip width and hence assess the quality of the electrodes tip in real time. The quality of spot welding electrode tips, namely flat-shaped, is assessed here using image processing techniques. For the tip type, a database of 250 images is used to test the performance of the tested algorithms.


Title of the Paper: Proposal of Categories and Availability of ITIL® Tools

 

Authors: Lukas Kralik, Roman Senkerik, Jakub Nozicka

Pages: 222-226

Abstract: This paper was created on the basis of the "Proposal of Methodology for Evaluating Free and Open Source ITIL® Tools." The paper focuses on the generally dividing and availability of ITIL® tools which is important for choosing the appropriate tool for implementation. Implementation of proprietary SW is too expensive and many medium-sized and small companies cannot afford that. Main objectives of mentioned project was to provide the manual which may help IT managers and administrators whit ITIL® implementation in their companies.


Title of the Paper: Bilinear and Smooth Hue Transition Interpolation-Based Bayer Filter Designs for Digital Cameras

 

Authors: Zhiqiang Li, Peter Z. Revesz

Pages: 211-221

Abstract: This paper describes the design of bilinear interpolation-based and smooth hue transition interpolation-based Bayer Filters for digital cameras using the System Generator for DSP. The paper also compares experimentally the MATLAB software implementation and the hardware implementation of these designs.


Title of the Paper: Aggregated Coefficients for Evaluation of Effectiveness of Alarm Systems

 

Authors: Jan Valouch

Pages: 205-210

Abstract: The effectiveness of alarm systems can be evaluated based on several factors. The first factor is the basic technical level of alarm system. The second factor is the method of application of the alarm system in an object. Other factors may include, for example quality of project, quality of installation or maintenance procedures and services. The proposal of alarm systems is based on the system and technical requirements, which are intended series of branch technical standards. These standards, however, does not solve the problems of evaluating the effectiveness of alarm systems. The aim of this paper is the presentation of the proposal aggregated coefficients, as a basic starting point for evaluating the effectiveness of alarm systems.


Title of the Paper: Superradiant Coherent Photons and Hypercomputation in Brain Microtubules Considered as Metamaterials

 

Authors: Luigi Maxmilian Caligiuri, Takaaki Musha

Pages: 192-204

Abstract: Several studies have suggested the theoretical possibility of considering human brain as supercomputer using superluminal evanescent photons eventually generated inside its microtubules to manipulate quantum bits in brain. In a previous work we have shown that in the water trapped inside brain microtubules could exist the conditions to allow a spontaneous QED quantum vacuum phase transition towards a macroscopic coherent quantum state characterized by a phased oscillation, at a rescaled frequency, between the water molecules states and an auto-generated electromagnetic field associated to a suitable electronic transition in them. As a result a self-trapped field of superradiant superluminal photons is just generated inside microtubules, characterized by an evanescent tail whose penetration depth is greater than the thickness of microtubules cylinder. In this way the interior of the brain MT cylinders can be considered as a resonant cavity for such superradiant photons whose refraction index depends on the rescaled coherent oscillation frequency. On the other hand it is already theoretical known and experimentally proven that a near perfect tunneling and amplification of evanescent electromagnetic waves is possible in a waveguide filled by a metamaterial. In this paper, basing on the consideration of some structural analogies between man-made metamaterials and some natural biological structures, we just propose the idea to interpret the inner medium of the brain microtubules cylinder as having the properties similar to those characterizing metamaterials and so able to specifically enhance the propagation of evanescent photons inside the neurons.


Title of the Paper: Technical Requirements for Electromagnetic Compatibility of Alarm Systems

 

Authors: Jan Valouch

Pages: 186-191

Abstract: Alarm systems and their components as electronic or electrical equipment are products which are the source and receiver of electromagnetic interference too. Alarm systems are deployed to ensure the protection of people and property in the form of an intruder alarm system, hold-up alarm system, CCTV systems, access control systems or social alarm systems. In terms of electromagnetic compatibility is necessary to address issues of the conformity assessment of products, selection of suitable components and in particular method of installation in a specific area of deployment. A major factor is the reduction of the risk of unstable states of the system - change of status, disruption or damage to components. The threat is represented by exposure of technical and natural resources of electromagnetic interference. The aim of the article is definition of legal and basic technical requirements for electromagnetic compatibility of components of Alarm systems.


Title of the Paper: Simulation and Processing Methods for the Guiding Signal of an Opt -Electronic System for a Homing Missile with a Modulator Disk, Faults Modelling

 

Authors: Chelaru Adrian, Chelaru Teodor-Viorel, Popa Eduard

Pages: 180-185

Abstract: In this paper we are proposing to present a technique of simulation for the formation of the digital signal generated with a modulator disk and also to describe the methods of processing the signal in order to obtain radial information. In the same time we will analyze different techniques for filtering the signal in order to damp the noise. For doing so, we will use band filtering techniques as well as more advanced techniques such as those based on the Fourier transformation. Finally, we will analyze the influence of these filters in which concerns the dependence of the radial information in comparison with noise/signal, and will model the two possible faults in optoelectronic system.


Title of the Paper: Study of the Power Performance of GaN Based HEMTs with Varying Field Plate Lengths

 

Authors: Gokhan Kurt, Ahmet Toprak, Ozlem A. Sen, Ekmel Ozbay

Pages: 174-179

Abstract: In this paper, we report the optimum power performance of GaN based high-electron-mobility-transistors (HEMTs) on SiC substrate with the field plates of various dimensions. The AlGaN/GaN HEMTs are fabricated with 0.6 μm gate length, 3 μm drain-source space. And also, the field plate structures with the lengths of 0.2, 0.3, 0.5, and 0.7 μm have been fabricated on these HEMTs. Great enhancement in radio frequency (RF) output power density was achieved with acceptable compromise in small signal gain. A HEMT of 0.5 μm field plate length and 800 μm gate width is biased under 35 V, at 3 dB gain compression, The results showed that we obtained a continuous wave output power of 36.2 dBm (5.2 W/mm), power-added efficiency (PAE) of 33% and a small signal gain of 11.4 dB from this device. We also could achieve a continuous wave output power of 37.2 dBm (5.2 W/mm), power-added efficiency (PAE) of 33.7% and a small gain of 10.7 dB from another HEMT with 0.5 μm field plate length and 1000 μm gate width. These results were obtained at 8 GHz without using a via hole technology. The results seem very stunning in this respect.


Title of the Paper: Electrically Adjustable Bracket for IP Cameras

 

Authors: Milan Adamek, Dora Lapkova, Rudolf Chovanec, Petr Neumann, Miroslav Matysek

Pages: 168-173

Abstract: The paper deals with design of control for surveillance camera positionable stand over Ethernet. It describes the selected hardware solution based on development kit with ARM microprocessor and connected board with additional electronics.The objective of this paper is to create an electrically-controlled bracket for analogue or IP cameras. The mechanical construction of the bracket itself and the possibilities of its movement are also described. The control device/unit assures the control of every individual part of the bracket. The primary operation of the various sections of the adjustable brackets is assured by bipolar stepper motors which are inserted into the mounting guide-rails. It also includes the design and implementation software used to control the bracket.


Title of the Paper: A Real Time Implementation on FPGA of Moving Objects Detection and Classification

 

Authors: K. Sehairi, C. Benbouchama, F. Chouireb

Pages: 160-167

Abstract: This paper proposes real time implementation on FPGA for moving objects detection and classification using Handel-C language; the results are shown in RGB video format. In the first part of our work, we propose a GUI interface programmed using the Visual C++ that facilitates the implementation for non-initiate users; from this GUI, the user can program/erase the FPGA or change filters or threshold parameters. The second part of this work details the hardware implementation of real-time motion detection algorithm on a FPGA including the capture, processing and display stages using DK IDE. The third part details the algorithm used to classify the moving objects into humans, vehicles and clutter. The targeted circuit was an XC2v1000FPGA embedded on the Agility RC200E board. A PixelStream-based implementation has been successfully performed and completed with a test validation on real-time motion detection and classification.


Title of the Paper: A Digital Protection Procedure for Smart Grid Reconfiguration After Faults

 

Authors: F. Muzi, Z. Bayasgalan

Pages: 153-159

Abstract: Smart grids can be considered as active, meshed networks. In order to increase the continuity level of power supply in these systems, it is of fundamental importance to quickly detect the presence and location of a fault and afterwards to reconfigure the network automatically, eliminating the faulted line-segment as fast as possible. Therefore, it is particularly important to draw up a selectivity plan which could prove accurate and valid for most possible faults. From this point of view indeed, the use of a proper selectivity coordination and the adoption of new-generation digital relays may substantially increase the supply continuity level of smart grids, which are being more and more widely implemented. The paper presents a fast, robust method based on a particular logic selectivity procedure that can be advantageously used also in the presence of Distributed Generation (DG). Moreover, the operation zones and setting of the proposed digital protection system are presented and explained. Finally, some problems of protection systems in the presence of DG are also discussed and commented.


Title of the Paper: New Image Processing Algorithms for Traffic Signs Recognition

 

Authors: Jarnea Alexandru Daniel, Florea Gheorghe, Dobrescu Radu

Pages: 145-152

Abstract: The paper presents two novel algorithms for visual information procesing in an advanced driver assistance system of intelligent vehicles. Our approach focus on the two  most important issues in these research area, the detection and recognition of traffic signs and the lane detection. The experimental results were made on images captured in real traffic and and demonstrate that the algorithms can successfully reach their goals with close to real time accuracy and with performance.


Title of the Paper: A Hybrid Adaptive Compressive Sensing Model for Visual Tracking in Wireless Visual Sensor Networks

 

Authors: Salema Fayed, Sherin Youssef, Amr El-Helw, Mohammad Patwary, Mansour Moniri

Pages: 134-144

Abstract: The employ of Wireless Visual Sensor Networks (WVSNs) has grown enormously in the last few years and have emerged in distinctive applications. WVSNs-based Surveillance applications are one of the important applications that requires high detection reliability and robust tracking, while minimizing the usage of energy to maximize the lifetime of sensor nodes as visual sensor nodes can be left for months without any human interaction. The constraints of WVSNs such as resource constraints due to limited battery power, memory space and communication bandwidth have brought new WVSNs implementation challenges. Hence, the aim of this paper is to investigate the impact of adaptive Compressive Sensing (CS) in designing efficient target detection and tracking techniques, to reduce the size of transmitted data without compromising the tracking performance as well as space and energy constraints. In this paper, a new hybrid adaptive compressive sensing scheme is introduced to dynamically achieve higher compression rates, as different datasets have different sparsity nature that affects the compression. Afterwards, a modified quantized clipped Least Mean square (LMS) adaptive filter is proposed for the tracking model. Experimental results showed that adaptive CS achieved high compression rates reaching 70%, while preserving the detection and tracking accuracy which is measured in terms of mean squared error, peak-signal-to-noise-ratio and tracking trajectory.


Title of the Paper: Stability of Diode-Laser Spectrometer for Monitoring of OCS, C3H4, CN Molecular Systems Concentrations

 

Authors: J. Skrinsky, M. Skrinska, Z. Zelinger

Pages: 128-133

Abstract: This paper describes the assessment of infrared detection technique by the Allan variance method. In particular, the results demonstrate how to determine the optimal averaging time in such experiments. The experimental technique is diode laser spectroscopy. Several molecules were studied including stable molecules (OCS, C3H4) and a short-lived free radical (CN). Three types of Allan variance are mathematically defined, and then their behavior is extensively tested on experimental data. Simultaneously, the integral formula for the direct conversion from the frequency to the time domain is used to get results for comparison. The stability analyses were determined by 2000 s measurements.  Results show the possibilities of the presented procedure that is going to be used for the evaluation of direct time domain laser frequency stability measurements. Results are focused on the area of influence of the reactivity on the optimal averaging time for the minimum detectable concentration is demonstrated where a question of the frequency stability is very important.


Title of the Paper: An Automat System for Monitoring Atmospheric Charging – Construction, Calibration and Modeling

 

Authors: C. Buzduga, A. Graur, C. Ciufudean, V. Valentin

Pages: 122-127

Abstract: This paper proposes an electronic system for monitoring atmospheric electricity charging. Our monitoring and warning system detects an electric field which has very high potential difference between clouds and ground. Our system basically compares the atmospheric electricity with a reference value. If the detected value exceeds the reference value the monitoring system will activate the warning circuit, and in case of imminent danger (e.g. the atmospheric electricity exceeds the maximum admissible value) our system can interrupt the power supply of the protected building. This system has several advantages: monitoring permanent atmospheric charging, very simple, low cost, easy to use and does not require specialized personnel but anyone can use.


Title of the Paper: Performance Enhancement of Conjugate Gradient Method (CGM) for Mobile Communications System

 

Authors: Thamer M. Jamel

Pages: 113-121

Abstract: This paper proposes new combination algorithms for performance enhancement of Conjugate Gradient Method (CGM) for adaptive beamforming system in mobile communications. Although the pure Conjugate Gradient Method (CGM) has better performance compared with pure Normalized Least Mean Square (NLMS) algorithm, but we can obtains further performance enhancement when we combine these algorithms together in one algorithm. The first new combination algorithm (NLMS-CGM) uses (NLMS) algorithm with a (CGM). While the second propose algorithm (MNLMS-CGM) uses Modified NLMS (MNLMS) algorithm with CGM. The MNLMS algorithm is regarded as variable regularization parameter ε(k) that is fixed in the conventional NLMS algorithm. The regularization parameter ε(k) use a reciprocal of the estimation error square of the update step size of NLMS instead of fixed regularization parameter (ε). With the new proposed (NLMS-CGM) and (MNLMS-CGM) algorithms, the estimated weight coefficients, which are acquired from the first (NLMS or MNLMS) algorithm, are stored and then used as initial weight coefficients for CGM algorithm processing. Through simulation results of adaptive beamforming system using an Additive White Gaussian Noise (AWGN) channel model, the NLMSCGM and MNLMS-CGM algorithms achieves about 5 dB and 13 dB improvement in interference suppression compared with a pure CGM algorithm respectively. Moreover, when these two algorithms applied for the Rayleigh fading channel with a Jakes power spectral density (worst case scenario), it provides about 4dB and 5 dB improvement over the pure CGM algorithm. The MNLMS - CGM algorithm provides fast convergence time and low level of missadjustment at steady state compared with the pure CGM and NLMS-CGM algorithms.


Title of the Paper: Low-Cost Intelligent Educational Laboratory Temperature Data Acquisition and Control Device

 

Authors: Libor Pekař, Petr Dostálek, Pavel Navrátil, Zdeněk Oborný

Pages: 103-112

Abstract: A simple yet smart compact modular low-cost microcomputer input/output (I/O) laboratory appliance for signal converting and control of a temperature educational plant has been recently developed and assembled at the Faculty of Applied Informatics, Tomas Bata University in Zlín, Czech Republic. In this paper, the motivation for this design decision and the description of the unit and its parts together with full electronic schemes are presented. The development of the new unit has been motivated i.a. by the fact that the currently used converter device for teaching experiments does not meet elementary safety and contemporary educational standards requirements. The designed appliance preserves some crucial features of the old one, and simultaneously brings new useful functions; namely, it is equipped with a four-line LCD panel and buttons which allow calibration the I/O channels with saving, and with RS232 interface for serial communication with PC. The significant advantage of the device is its price which is much lower than for similar commercial products and makes the unit easily reachable. A particular example of using the appliance in the educational process is also provided to the reader. Unit imperfections and ideas of its possible future enhancement conclude the paper.


Title of the Paper: Development of an IEEE 1588 Simulator and Analysis of UAVs’ Synchronization in a FANET Environment

 

Authors: Eiras F. C. S., Zucchi W. L.

Pages: 94-102

Abstract: The application of IEEE 1588 standard is becoming quite common in distribution of synchronization information in packet networks. Studies of synchronization accuracy that can be reached with PTP protocol, defined in IEEE 1588 are essential for application design, both in telecommunications and in sensors industry. This article presents a new strategy for simulation of distribution synchronization which is more scalable and where simulation time is better controlled. We propose a strategy to use this simulation technique in a FANET environment where the synchronization information exchange is impaired by nodes movement, besides traffic bottlenecks in the network.


Title of the Paper: Speaker Identification in Mismatch Condition Using Warped Filter Bank Features

 

Authors: Mahesh S. Chavan, Sharada V. Chougule

Pages: 88-93

Abstract: Human speech carries variety of information along with actual message. One of these information is identity of the person from his speech. Features carrying the speaker related characteristics are derived from a set of psycho-acoustically motivated filter bank. These filter banks are designed to mimic the human auditory system. The cepstral features derived from these filter bank are used to model the speech or speaker depending upon the task or application. Over the years, MFCCs (mel frequency cepstral coefficients), derived from mel-scale warped filter bank are being used as a physiological feature representing human vocal tract characteristics. Degradation of system performance in any type of  mismatch is main drawback of  MFCCs. Mismatch in training and testing adversely affects these features and in turn the performance of the system. Therefore extracting the accurate features present in the speech signal related to the speaker, is still a challenging task in mismatched condition. In view of this, alternate frequency warping techniques such as Bark and ERB rate scale can have comparable or better  performance to that of mel-scale warping. In this paper the performance short time cepstral features generated using filter banks with Bark and ERB rate warping is investigated in relation to robustness for speaker identification in mismatch condition. For this purpose, two types of  sensor mismatched databases are used. Performance of closed set speaker identification system  is analyzed  under text-dependent and text-independent cases. Front end signal processing is performed with spectral subtraction to reduce the effect of any additive noise. Also normalization of feature vectors is carried out over each frame, to compensate for channel mismatch.  Results shows that, Bark and ERB warped filter bank features gives comparable performance to that of mel-scale in text dependant case for both matched and mismatched condition. Whereas bark scale cepstral features having superior performance in mismatch condition.


Title of the Paper: Comparison of d,q,0 Model and Transient Finite Elements Analyses of Induction Motor

 

Authors: H. T. Duru

Pages: 81-87

Abstract: In this paper,   two  different analysis approaches,  the solution ot the  transformed d,q,0  model  and the solution of  Transient Finite Elements  model   of an Induction Motor (IM) are implemented and the results are reported. The d, q, 0 model of an induction motor is well known and widely used as an analysis tool.  On the other hand, increasing computational features of computers make possible of   time domain   Finite Elements Analysis in both 2D and 3 D geometries. This paper focuses on the similarity of the results those which are obtained by using these different approaches. For this purpose  a sample IM  is designed by using  a CAD software and  parameters required for d,q,0 model are obtained. This design is also used to implemented 2D TFE model as well. Especially the results of the 2D Transient FE analyses and d, q, 0 model results are found as considerably close to each other. Beside this comparison, in order to  demonstrate the merits of the Transient FE analysis,  unbalanced voltage fed operation is simulated in 2D geometry and effects of  rotor bar skew rate  on the performance of IM  is simulated in 3D geometry. Finally the results are discussed in brief.


Title of the Paper: Circuit Representation of Load and Line Asymmetries in Three-Phase Power Systems

 

Authors: Diego Bellan, Gabrio Superti Furga, Sergio A. Pignari

Pages: 75-80

Abstract: This work deals with circuit representation of load and line asymmetries in three-phase power systems. Indeed, it is well known that under the assumption of symmetrical phases, power systems are effectively analyzed through the symmetrical component transformation leading to uncoupled sequence circuits. In practical power systems, however, the assumption of symmetrical phases is not always met for several reasons including, for example, single-phase loads (e.g., high-speed railway systems) and untransposed overhead transmission lines. From a circuit viewpoint, when the symmetrical component transformation is applied, such asymmetries result in coupled sequence circuits. As a consequence, a voltage on the negative-sequence circuit arises, leading to the well-known detrimental phenomenon of voltage unbalance emission. In this paper, a rigorous circuit representation of coupling between positive- and negative-sequence circuits is derived by means of the definition of an ideal transformer with complex turns ratio. The proposed equivalent circuit is useful to get deeper insight into the fundamental mechanisms of voltage unbalance generation and identification. Moreover, the proposed circuit representation can be readily implemented into software for circuit simulation.


Title of the Paper: Simulation of Ultrawide Band Pulse Propagation in Asymmetrical Modal Filter for Power Network Protection

 

Authors: Alexander M. Zabolotsky, Alexander T. Gazizov

Pages: 68-74

Abstract: Use of modal filtration is proposed as a new approach of power network protection against threat of ultrawide band pulses. A new structure of modal filter, based on widely used FR-4 material, is considered. Dependencies of its characteristics on width and separation of conductors and thickness of a dielectric are simulated. Possibility for modal filter 0.75 m in length to decrease by factor 7 the magnitude of an input pulse with total duration of 3 ns is shown. Possibility of fast estimations for asymmetrical structures of modal filter is revealed. Results of complete simulation of asymmetrical modal filter structure extended to simulation taking into account frequency depended losses both in conductors and dielectrics are presented and compared with lossless case. Considerable attenuation of odd mode pulse resulting in some decrease of total signal magnitude at modal filter output is revealed.


Title of the Paper: Materials Used for the Measurement of the PIR Detector in Far Infrared Range

 

Authors: R. Drga, D. Janáčová, H. Charvátová, V. Vašek

Pages: 62-67

Abstract: The work deals with the limitations of parasitic sources of radiation environment in preparing the workplace for measuring the spatial characteristics of PIR detectors in the infrared region. Performs shading measurement sensors and detectors, defines the characteristics of the radiation source, the reflective properties of its surroundings, removes the effect of heat radiation operator.


Title of the Paper: A Fast Algorithm for Texture Feature Extraction from Gray Level Aura Matrices

 

Authors: Zohra Haliche, Kamal Hammouche, Jack-Gerard Postaire

Pages: 54-61

Abstract: The Gray Level Aura Matrix (GLAM) is an efficient tool for texture analysis. Considering all the possible couples of gray levels in an image, it indicates, for each couple, how many pixels with one of the two gray levels have, in their neighborhood, pixels with the other gray level. The neighborhood is defined by a structuring element as in mathematical morphology. In the image segmentation process, a GLAM is determined for each pixel and is scanned once or twice in order to extract texture features. To avoid a high computation time, we introduce a strategy, based on a so-called Gray Level Aura Hybrid Structure (GLAHS), which combines a linked list and an integrated hash table. The linked list is used to store the non zero elements of the GLAM and the hash table allows to access quickly to the nodes of that list. The length of the linked list is generally short, allowing a fast extraction of texture features.


Title of the Paper: ISFET Characterization Using Constant Voltage Constant Current Readout Circuit

 

Authors: R. Jarmin, Khuan Y. Lee, S. F. Mohammed Esa, H. Hashim, A. Z. Mohd Sih, M. H. Abd Ghani

Pages: 47-53

Abstract: This paper presents a constant voltage constant current readout circuit for ion-sensitive field-effect transistor (ISFET). The study and investigation of ISFET performance using Linear Technology Simulation Program with Integrated Circuit Emphasis (LTspice) in order to identify the characteristics relationship of an ISFET variable is included. A macromodel of an ISFET had been created and tested using simulation program, in order to make sure the performance results of ISFET as the ion concentration (pH) changes, the current of the transistor will change accordingly. The graphs showing relationship between Id with Vd, Vref and VpH were produced, in order to make sure the macromodel function as stated characteristic. This paper also consists of analysis results before and after combining an ISFET voltage constant current (CVCC) readout circuit. The results of the simulation are taken in order to monitor the behavior of ISFET variable by changing in the pH of the electrolyte which affects the voltage output at CVCC circuit


Title of the Paper: Testing of an Intrusion and Hold-up Systems for Electromagnetic Susceptibility - EFT/B

 

Authors: Hana Urbancokova, Jan Valouch, Milan Adamek

Pages: 40-46

Abstract: The development of electronics in the last decades has clearly shown that for each electronic device is important to know its electromagnetic susceptibility and its own electromagnetic radiation. This knowledge allows us to determine the suitability of the placement of the given type of device to a specific environment, which requires not only its correct functionality, but also the functionality of other devices. The intention of the security alarm systems is to detect and signal the presence, ingress or attempted ingress of the intruder into the building. It is therefore important for components of security systems to be tested for electromagnetic susceptibility. Their trouble-free operation must be ensured not only in the residential and commercial environments, but also in the industrial environments.


Title of the Paper: Power MOSFET Based Photo-Voltaic Battery Charger Analysis and Implementation

 

Authors: Kamala J., Janarthanan V., Santhosh K.

Pages: 33-39

Abstract: Power MOSFET is the basic control element in all types of power electronic converters. Recent studies are focused on charging Battery using Solar Energy to eliminate the energy crisis. This paper analyzes the losses associated with Power MOSFET used to charge batteries from solar energy. N channel and P channel HEXFET Power MOSFET Devices are chosen. Efficiency of the Photo-Voltaic (PV) charger is derived for different switching frequencies of device. Efficiency of PV system with N channel device is better with complicated gate driver circuit, compared to P channel device. Solar panel of 100W and battery of 12V, 42Ah capacity is chosen for this application. Maximum power point voltage of solar cells occurs at 17.5V.  Direct controlled connection between solar cell and battery is one method of battery charging. Second approach uses Buck converter to charge the battery.  Both techniques use power MOSFET for control purpose. Parameters available for controller for this application are Solar panel voltage/current and Battery voltage/current. As the battery voltage is fixed, it is shown that sensing battery current for control purpose provides better results compared to usual Maximum Power Point Tracking (MPPT) algorithms. Spartan 6 Field Programmable Gate Array (FPGA) based battery charge controller is implemented based on the results of this paper. Results and discussions of this paper are useful for the selection of switching device, duty cycle and the operating frequency.


Title of the Paper: FPGA-Based Reconfigurable Computer Systems for Digital Image Processing

 

Authors: Ilya I. Levin, Igor A. Kalyaev, Alexey I. Dordopulo, Liubov M. Slasten, Vyacheslav A. Gudkov, Vassily B. Kovalenko

Pages: 27-32

Abstract: Multithread processing of large data at a rate of data receiving, which is typical of various problems of digital signal processing (locating image features by template matching, digital filtering, etc.), can be successfully performed on reconfigurable computer systems. The paper covers design principles, technical parameters and design features of reconfigurable computer systems based on field programmable gate arrays (FPGA) of Xilinx Virtex, applied for problems of digital signal processing at a rate of data receiving. A software suit, which was developed for realization of applications, written in a high-level programming language, and which provides creation of effective solutions of digital signal processing tasks on reconfigurable computer systems is considered in the paper. The distinctive features of the synthesized solutions are their high real performance, low power consumption, and practically linear growth of the real performance at increasing of hardware resource. Solutions of the problem of locating image features by template matching and the problem of processing of speckle-images using the Labeyrie method for astronomical object recognition, developed with the help of the considered software suit are given. There is also shown the real performance that was achieved for the given problem solutions.


Title of the Paper: Semantic Organization of Product Lifecycle Information Through a Modular Ontology

 

Authors: Giulia Bruno

Pages: 16-26

Abstract: It is known that one of the main reasons of the success of manufacturing enterprises is their ability to design and maintain a coherent structure to represent their knowledge, especially the small and medium sized enterprises (SMEs), which are not often organized to manage information efficiently. Several commercial PLM systems have been developed in the last years to help companies in organizing their large amount of data, but they are rarely exploited mainly due to the high cost and difficult customization. Recent trends in literature focused on the development of semantic knowledge management systems, both to help companies in organizing and sharing their data and to allow the easy finding of information and its reuse. The aim of this paper is to develop a knowledge management system to structure the product lifecycle knowledge of SMEs based on a modular ontology. The modular ontology contains a reference ontology to represent the main concepts with their relationships, and several domain-specific ontologies to specialize and enrich the reference ontology with specific information. Particularly, this paper is focused on the specification of the reference ontology with a manufacturing process ontology module. Some examples of the usage of the system to extract information through SPARQL queries are also presented.


Title of the Paper: Monitoring of the Tests EMS Information Technology Equipment Using the CCTV System

 

Authors: Hana Urbancokova, Jan Valouch

Pages: 9-15

Abstract: The tests of electromagnetic susceptibility equipment on the emitted high-frequency the electromagnetic field is carried out in laboratory conditions due to the high intensity field generated in shielded chambers. During the testing of equipment in anechoic/semianechoic chambers the operator is located outside the chamber. Therefore, it is necessary shielded spaces equip a camera system that ensures monitoring of the state of the equipment. This article aims to analyze the requirements for measurement and testing of information technology equipment. Information technology equipment and their sub-components are electronic equipment, ie. the products which are potential sources of electromagnetic interference and also their correct operation threatened interfering emission of electromagnetic environment on site. The assessment of product conformity includes measuring and testing parameters of electromagnetic compatibility. The main outcome the article is the proposal of the camera system, which provides technical support for the implementation of EMC tests for the information technology equipment.


Title of the Paper: Using a Decoupling Technique to Identify the Magnetic Flux in a Permanent Magnet Synchronous Motor

 

Authors: Paolo Mercorelli

Pages: 1-8

Abstract: Unknown parameters cause difficulties in the control of permanent magnetic motors. Particular techniques are requested to be able to achieve an appropriately controlled dynamics identification. A geometric approach for achieving a decoupling of the system is applied in the presented strategy. The decoupling makes the estimation of the Permanent Magnet Synchronous Motor (PMSM) parameters easier. A feedback controller in combination with the feed-forward controller being generated by an input partition, achieves the decoupling. This can be applied to various types of motors or systems in case of the decoupling conditions being satisfied. A control together with the identification method is tested in the simulation section. The presented simulation and measured results are shown for validation of the strategy which is proposed.