		FeedBack \| Contact Us \| Links \| Site Map

Welcome to Journal of Theoretical and Applied Information Technology

Submit Paper / Call for Papers

Journal receives papers in continuous flow and we will consider articles from a wide range of Information Technology disciplines encompassing the most basic research to the most innovative technologies. Please submit your papers electronically to our submission system at http://jatit.org/submit_paper.php in an MSWord, Pdf or compatible format so that they may be evaluated for publication in the upcoming issue. This journal uses a blinded review process; please remember to include all your personal identifiable information in the manuscript before submitting it for review, we will edit the necessary information at our side. Submissions to JATIT should be full research / review papers (properly indicated below main title).

Journal of Theoretical and Applied Information Technology
August 2015 | Vol. 78 No.3

Title:	IDENTIFYING THE CHALLENGES AND BARRIERS HEARING-IMPAIRED LEARNERS FACE WITH USING ICT EDUCATION COURSES
Author:	NORAZAH NORDIN1, MELOR MD YUNUS, ROZNIZA ZAHARUDIN, HADI SALEHI, MOHD HANAFI MOHD YASIN, MOHAMED AMIN EMBI
Abstract:	Communication between the hearing-impaired individuals and the normal-hearing individuals can be very difficult. It is often true that in universities or classes scenarios, the hearing-impaired individuals are often involved in project-oriented groups; thus, miscommunication is normal between them and the normal-hearing individuals. This research aims to identify the problems and challenges amongst the hearing-impaired individuals in learning the various ICT-Education (Information and Communication Technology) courses for connecting the ICT courses and the deaf learners for further education. To achieve the aim of this study, analysis was carried out in all schools in Malaysia, including Sabah and Sarawak, which employ the hearing-impaired education program for the secondary level of Form 4 and Form 5. This analysis was done in the forms of survey questionnaires, interview sessions, and observation. Teachers were chosen as respondents mainly because they are the main individuals that interact directly with the hearing-impaired individuals. Therefore, their views and opinions about the suitable ICT courses for the hearing-impaired students were greatly appreciated and needed. According to the problems stated, an e-learning portal offering ICT courses was needed to be developed especially for the hearing-impaired individuals to solve the problems. The hearing-impaired individuals deserve the equal opportunities as the normal-hearing individuals to learn ICT education; hence, they would not be left behind in learning computer courses.
Keywords:	Hearing-Impaired Individuals, Information and Communication Technology (ICT), E-Learning, E-ICT Courses.
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	TEST CASE GENERATION AND PRIORITIZATION BASED ON UML BEHAVIORAL MODELS
Author:	AJAY KUMAR JENA, SANTOSH KUMAR SWAIN, DURGA PRASAD MOHAPATRA
Abstract:	Test case prioritization (TCP) techniques have been proven to be beneficial for improving testing activities. Prioritized test suites are found using different techniques of prioritization. While code coverage based prioritization techniques are found to be used by most scholars, test case prioritization based on UML behavioral models has not been given much attention so far. We propose a novel approach for generating and prioritizing test cases using UML sequence and interaction overview diagrams. First, we convert the interaction overview diagram to interaction Graph (IG) and sequence diagram to Message Sequence Dependency Graph (MSDG). An intermediate graph known as Sequence Interaction Graph (SIG) is generated by combining MSDG and IG. From SIG, we generate the test scenarios and subsequently the test cases. For test case prioritization, the first task is to convert the SIG into another graph known as Dependency Graph (DG). Then, we assign weights to each node of the DG according to its impact using backward slices and based on condition criticality. Further, we calculate the weights of each basic path. According to these weights, finally, we prioritize the test cases. We have used the impact, complexity and criticality of the elements present in the model for the prioritization of test cases. The results obtained by our approach indicates that the proposed technique is efficient and effective in prioritizing (ordering) the test cases using UML models. Our proposed approach achieves higher Average Percentage of Fault Detection (APFD) compared to other related approaches.
Keywords:	Test case, Backward Slicing, Dependency Graph, Code Coverage, Prioritization, Interaction Graph.
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	MOBILE OPTICAL WIRELESS SYSTEM FOR HEALTHCARE CONTINUOUS MONITORING USING IR TECHNOLOGY
Author:	E. A. ALYAN, S. A. ALJUNID, M. S. ANUAR
Abstract:	In this paper, indoor optical wireless system using Infrared (IR) technology is developed for healthcare monitoring. This to insure the reliability, the security and the mobility of the patient during his/her stay in hospital. Various studies were performed to develop a mobile optical wireless system but using celling bounce model which considers just one reflection and the transmitter has to be pointed to the ground which limits the patient’s mobility and movements. In this research, we consider an optical source (LED) coupled with the medical sensor and can randomly change its position within the xy-dimensions of the room and within height varying from 0 to 1.3 m which is the average height of the medical sensor to be put on the body. While the receiver is located on the centre of the ceiling. The line of sight and diffuse propagation links are considered to investigate the capability of the developed system to transmit the health information of the patient to the receiver after undergoing multiple reflections from different walls and objects placed in the room. Using MATLB simulation, the average received power, RMS delay spread, SNR and BER are calculated in order to evaluate the performance and capability of the system with LOS, first and second order reflections for all positions that patient can reach to.
Keywords:	Infrared; Optical wireless; Diffuse; LOS; RMS delay spread; Healthcare monitoring
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	A SYSTEMATIC LITERATURE REVIEW OF COMPUTER ETHICS ISSUES
Author:	TAN MING MING, MARZANAH A. JABAR , FATIMAH SIDI, KOH TIENG WEI
Abstract:	Given the importance and concern of computer ethics, four issues have been identified in the field of computer and Information Technology (IT). This study was carried out to review the work done on computer ethics issues for the years 2010 to 2014. This paper identifies the methods used, topics addressed, and the main findings published of the research about ethical issues in computer usage. Systematic literature review (SLR) has been conducted according to the standard guidelines, and a study protocol was applied to answer three research questions: 1) What are the ethical issues in computer ethics that have been discussed in previous research?, 2) What are the most recent topics among computer ethics issues?, and 3) To what extent does investigation among IT students, Non-IT students and IT professionals display different perceptions of IT issues? Based on the evidence extracted from 40 studies, it has been clearly stated that software piracy in Privacy, Accuracy, Property and Accessibility (PAPA) and general issues are the topics most frequently discussed. It shows the gaps in the current literature pertaining to computer ethical issues and in particular, the issue of software piracy.
Keywords:	Computer Ethics, Ethical Issues, Systematic Literature Review, Papa Framework, Software Piracy
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	DC POWER SUPPLY WITH POWER FACTOR CORRECTION USING INTEGRATION OF FLYBACK-FORWARD TOPOLOGY IN PARALLEL CONNECTION
Author:	MOH. ZAENAL EFENDI, NOVIE AYUB WINDARKO
Abstract:	This paper presents a new configuration of a dc power supply with power factor correction using integration of flyback and forward topology in parallel connection. Flyback converter is used for power factor corrector and it operates in discontinuous conduction mode so that it becomes as a natural resistance. Forward converter is used as a dc regulator and operates in continuous conduction mode. A prototype circuit, which has 20 Volt of output voltage and 5 A of output current is designed and tested by a simulation and experiment. According to the simulation and experiment results, the power factor of this circuit can be achieved up to 0.96 and the input current meets the international harmonics standard of IEC61000-3-2 class A and class D so it can be used as power supply for computer, monitor and television.
Keywords:	Power factor correction, Flyback converter, Forward converter, IEC61000-3-2
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	CUSTOMER SEGMENTATION THROUGH FUZZY C-MEANS AND FUZZY RFM METHOD
Author:	NI PUTU PUTRI YULIARI ,I KETUT GEDE DARMA PUTRA , NI KADEK DWI RUSJAYANTI
Abstract:	This research aims for finding the potential customer use data transaction. This causes, the company is difficult to arrange customers who have high and low loyalty and this research have a application for customer segmentation to help analyzing transaction data with Fuzzy C-Means for clustering and Fuzzy RFM for identify the customers. Softwares used to conduct this experiment are Microsoft SQL Server to saving the database and Matlab as the tools. The results of this segmentation for four experiments are two classes. Its has superstar I and Occasional H for each number cluster and then for the best number of cluster for this experiments are two clusters according MPC method.
Keywords:	Customer segmentation, Clustering, Fuzzy c-means, Fuzzy RFM, MPC (Modified Partition Coefficient)
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	LEAST AND UNIQUE PRICE AUCTION WITH ASCENDING SLICES (LUP-AS): PLAYING GAME STYLE ONLINE-AUCTION
Author:	DR. MOHAMMED OTAIR
Abstract:	In last two decades, Online (Web) auctions and its types took a lot of attention by researchers and business corporates. The main problem in many auction types is the fixed-closing time, which causes a phenomenon called "sniping" (i.e. submitting a bid at the final moments by one of the bidders). This paper resolved this problem by presenting a proposed type of online auctions called Least and Unique Price with Ascending Slices (LUP-AS) which is an enhanced version of LUP [6][7]. In the LUP-AS, the item price will be collected by the bidding processes. During the auction life there will be many temporary winners (who submit the least and unique price). However, the winner in this auction has to submit the least, unique but his price must be greater than the number of cancelled bids. The number of cancelled bid is a counter incremented by one when a bidder submit a least but not unique price during the auction life. The main advantages of LUP-AS are: Funny (like playing game), semi-sealed, dynamic (no fixed closing time and discard the snipers), the winner pay a very least price for item, and the seller gets the fair price. An implementation of LUP-AS uses an Artificial Neural Network in order to provide the administrators the ability to classify the bidders into groups to distribute special benefits according to each group.
Keywords:	Online Auction, Bidders, Descending Bid, Sealed Bid, Acceptable Price.
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	SIMULATION OF GPR SCENARIOS USING FDTD
Author:	GAMIL ALSHARAHI, ABDELLAH DRIOUACH, AHMED FAIZE
Abstract:	The Finite-Difference Time Domain (FDTD) method has become a standard simulation technique in computational electromagnetics. It has been extended and improved for accurately treating almost any kind of problem involving complex materials with arbitrary geometry and it continues to be an active field of research. The method has become so powerful that it is used as the computational core of not only many in-house tools but also commercial packages used to design electromagnetic systems (Reflexw, CST, EMPIRE, XFDTD, etc). Computational tools, such as FDTD, have become power-ful tools for GPR user, since the time-domain nature of FDTD-based programs enables the visualization of the causal evolution of complex electromagnetic phenomena such as the propagation of electromagnetic pulses in GPR scenarios that involve layered media, dispersive media, objects of arbitrary shape, etc. In the following paper several scenarios found during the GPR survey are simulated using FDTD and the results are commented on.
Keywords:	Ground Radar, Propagation, Electromagnetic Wave, FDTD Simulations
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	NATURAL GRASS PATH LOSS MODELING BASED ON WIRELESS SENSOR NETWORK DEPLOYMENT
Author:	AUDA RAHEEMAH , NASEER SABRI, PHAKLEN EHKAN, M.S.SALIM, OMAR KHALDOON A
Abstract:	Empirical propagation models (EPM) have got high interest in both research and various applications due to their speed of execution and their limited dependence on detailed knowledge of the terrain. This paper derives a model for predicting radio frequency propagation for Wireless Sensor Network (WSN) deployment in natural grass environment. Real time physical data of ZigBee WSN are collected and an empirical path loss prediction model is derived from the actual measurements. To validate the proposed model, two popular models, FSPL and PE models, are used and a comparison of results is conducted. The results show that the mentioned popular models with WSN wave propagation are inaccurate and cannot be used in predicting the path loss between wireless sensor nodes deployed in natural grass environments. Thus, a new propagation model is derived for natural grass Zigbee WSN and to be used adequately by researchers and developers.
Keywords:	Propagation model, Path losses, RF attenuation, RF propagation, WSN, ZigBee standard.
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	A NEW ALGORITHM FOR OPTIMIZING THE SELF-ORGANIZING MAP
Author:	BEN-HDECH Adi , GHANOU Youssef, EL QADI Abderrahim
Abstract:	The selection of the architecture of Kohonen networks, associated with a given problem, is one of the most important aspects of neural network research; the choice of neurons number and the initial weights has a great impact on the convergence of learning methods trained. In this paper, we present a new method for optimizing the Self-Organizing Map. This approach consists to identify and to select the best map. The goal is to delete unimportant units in the kohonen map. To test our approach, we use two databases Iris and Seeds. The results obtained demonstrated the effectiveness of the proposed approach.
Keywords:	Self-Organizing Map, Optimization, Clustering, Classification, SVM
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	AN EFFICIENT DETECTION SYSTEM FOR A DROWSY DRIVER
Author:	JAMAL ZRAQOU, ADI MAAITA, WESAM ALKHADOUR, FADI HAMAD
Abstract:	This paper describes an efficient detection system to monitor driver vigilance. A regular webcam is used to point directly towards the driver’s face and monitors the driver’s eyes in order to detect drowsiness in about real-time. Image processing technology is involved to analyze images of the driver's face taken by a regular webcam. Alertness is detected based on the degree to which the driver's eyes are open or closed. Several efficient methods are employed to achieve the efficiency. Experiments are performed to reveal the performance of the proposed method in a simulating environment with subjects of different ages, genders, and under different lighting conditions.
Keywords:	Drowsy Driver Detection, Facial Expression Detection, Eyes Detection, Facial Expression Extraction, Facial Action Unit Detection.
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	IMPORTANCE OF USING GOLD SEQUENCE IN RADAR SIGNAL PROCESSING
Author:	G S KRISHNAM NAIDU YEDLA, C H SRINIVASU
Abstract:	In this paper we will discuss about the relevant topics of coding sequences. The coding sequences are used in designing the waveforms in the radar applications. By using different codes in generating the waveforms, there will be a decrease in the side lobes in the ambiguity function. More minor lobes in the ambiguity function represent the confusion in detecting the targets and another application is we can easily identify the minor targets. Gold sequences, having good cross correlation properties will help in managing the interference between successive pulses. The strong research objective is to show the significant improvement in radar clutter. Different lengths of barker codes are taken and its autocorrelation properties and ambiguity functions are compared by generating different lengths of gold sequence. All the results mentioned here are simulated in mat lab.
Keywords:	Gold Sequence, Pseudorandom Sequence
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	A COGNITIVE E-LEARNING SYSTEM USING AROUSAL VALENCE EMOTIONAL MODEL
Author:	A. KANIMOZHI, DR.V.CYRIL RAJ
Abstract:	This paper proposes an approach to connote the basic human emotion to learner’s emotion for e learning. The emotions are captured from the EEG signals and are processed at various levels to classify them. This paper uses arousal-valence model to recognize the learner’s emotion. In addition, we introduce a cognitive system -Adaptive Control of Thought—Rational – (ACT–R) to dynamically monitor the learner’s emotion. This dynamic cognitive learning environment brings the learner’s mood to active listening mood through an external stimulus. This enables the learner to improvise their in-depth knowledge about the learning content and kindle their interest towards the subject. In general, this method is similar to the conventional classroom teaching where the teacher modulates the content delivery method depending on the mood of student.
Keywords:	EEG, Cognitive Architecture - ACT-R, Intelligent Learning Environment, E-learning
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	USING FUZZY SETS TO MODEL PARALINGUISTIC CONTENT IN SPEECH AS A GENERIC SOLUTION FOR CURRENT PROBLEMS IN SPEECH RECOGNITION AND SPEECH SYNTHESIS
Author:	SACHIN LAKRA , T. V. PRASAD , G. RAMAKRISHNA
Abstract:	Current problems in speech processing exist due to infinite variations of speech utterances. No two speech utterances are exactly alike, even if they are linguistically the same word. The difference is therefore, due to the paralinguistic content of the speech utterances. This leads to the conceptualization of the paralinguistic content of speech as arising from infinite variation. Infinite variation in paralinguistic content has been modeled using the interval [0, 1], the basis of fuzzy theory. Variability, that is, the ability to vary, has been identified as the property of natural systems, due to which infinite variation is possible. Thus, variability as a concept has been mapped to paralinguistic content. Further, each component of paralinguistic content has been mapped to a group of membership functions of fuzzy sets.
Keywords:	Variability, Paralinguistic Content Elimination, Paralinguistic Content Expression, Speech Recognition, Speech Synthesis.
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	EXAM QUESTIONS CLASSIFICATION BASED ON BLOOM’S TAXONOMY COGNITIVE LEVEL USING CLASSIFIERS COMBINATION
Author:	DHUHA ABDULHADI ABDULJABBAR, NAZLIA OMAR
Abstract:	Assessment through written examination is a traditional method but it is a universal test method practiced in most of the educational institutions today. Therefore, the question must be provided in accordance with the subject content learned by students to fulfil learning objectives. However, the process of questions writing is very challenging step for the lecturer. The situation is getting more challenging when lecturers try to produce good quality and fair questions to assess different level of cognitive. Thus, the Bloom’s Taxonomy has become a common reference for the teaching and learning process used as a guide for the production of exam questions. Exam questions classification presents a particular challenge is the classification of short text questions due to short text involves text with less than 200 characters. In addition, the features of short text are very sparse and far. This study proposed a new method to classify exam questions automatically according to the cognitive levels of Bloom’s taxonomy by implementing a combination strategy based on voting algorithm that combines three machine learning classifiers. In this work, several classifiers are taken into consideration. The classifiers are, Support Vector Machine (SVM), Naïve Bayes (NB), and k-Nearest Neighbour (k-NN) that are used to classify the question with or without feature selection methods, namely Chi-Square, Mutual Information and Odd Ratio. Then a combination algorithm is used to integrate the overall strength of the three classifiers (SVM, NB, and k-NN). The classification model achieves highest result through the combination strategy by applying Mutual Information, which proved to be promising and comparable to other similar models. These experiments aimed to efficiently integrate different feature selection methods and classification algorithms to synthesize a classification procedure more accurately.
Keywords:	Bloom’s Taxonomy, Exam Questions, Voting Algorithm, Machine learning, Feature Selection
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	AUDIT OF ACCOUNTING INFORMATION SYSTEM USING COBIT 4.1 FOCUS ON DELIVER AND SUPPORT DOMAIN
Author:	NI PUTU SRI MERTA SURYANI, GUSTI MADE ARYA SASMITA, I KETUT ADI PURNAWAN
Abstract:	The audit is required at a university to evaluate the IT services on accounting information system. The audit of accounting information system at one of the universities in Indonesia aims to determine the maturity level of IT services in support the financial data management. Audit of accounting information system is very important because the university can determine the extent of IT services that has been given. In addition, the audit results can also be used as a reference for the future in improving IT services in accounting information system. Stages of accounting information system audit begin with choosing a domain which includes the identification of business goals, IT goals, IT process and control objectives using COBIT 4.1 framework. The next stage is to collect the necessary data through interviews and surveys using questionnaires. The data collected are then processed to obtain a maturity level. Results of audit of accounting information system that has been conducted show that the maturity index of the entire IT process is 2.69, which means the current level of maturity in 3-defined. The expected level of maturity is 4-managed. A comparison of the current and expected level of maturity to give rise the gap. Improvement strategy are given to overcome the gaps that appear based on the COBIT 4.1 framework and supported by ITIL V3 framework that has been through the mapping process using the COBIT 4.1 IT process.
Keywords:	Audit of Information System, COBIT 4.1, ITIL V3, Maturity Level, Gap, Improvement
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	DETERMINATION OF UNKNOWN PARAMETERS OF MATHEMATICAL MODEL USING THE EXPERIMENTAL DESIGN THEORY
Author:	VLADIMIR SERGEEVICH EREMEEV, VLADIMIR LEONIDOVICH KURBATOV, ELENA VLADIMIROVNA GULYNINA
Abstract:	The range of problems that can be solved with the help of mathematical modeling is constantly increasing, which creates new theoretical problems. One of them is connected with identification of unknown parameters of models. The problem of parameters determination belongs to the class of inverse problems. They are usually considered within the optimization theory. In the present paper, we propose a fundamentally new approach. The method is based on the theory of planning and processing of experiments developed by American scientists Box and Wilson. To evaluate the adequacy of model, a numerical criterion W is formulated depending only on the model parameters a1, a2,... ak. It is shown that the maximum adequacy is achieved for the minimum value of W. Therefore, solving the problem of calculating the parameters is reduced to determination of such values of a1, a2,... ak that provide the minimum value of the criteria W. This problem is solved by the steep ascent method due to Box and Wilson.
Keywords:	Mathematical Modeling, Inverse Problems, Regression Equation, Algorithm Of Calculations
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	EHRS ACCEPTANCE IN JORDAN HOSPITALS BY UTAUT2 MODEL: PRELIMINARY RESULT
Author:	MALIK B. ALAZZAM, ABD. SAMAD HASAN BASARI , ABDUL SAMAD SIBGHATULLAH , MOHAMED DOHEIR , ODAI M.A.ENAIZAN , ALI H.KH.MAMRA
Abstract:	Purpose: Electronic health records (EHRs) exchange improves hospital quality and reduces health costs. However, few studies address the antecedent factors of healthcare professionals’ intentions to use EHR system. We examine the factors that effecting on EHRs acceptance by Unified Theory of Acceptance and Use of Technology (UTAUT2) model, this is a new methodology for evaluating acceptance of EHRs. We propose a theoretical model to explain the exercise behavior of health care professionals’ to use an EHR system acceptance. Methods: We conducted a pilot test survey in Jordan hospitals to collect data from healthcare professionals who had experience using the EHR systems. A valid sample of 22 responses from 70 questionnaires were collected for data analysis to pilot test
Keywords:	Ehrs, Healthcare Professionals, UTAUT1, UTAUT2, Healthcare Professionals, Acceptance
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	THE FREQUENCY RESPONSE OF A DYNAMIC SYSTEM
Author:	MIKHAIL L. SIMONOV, KONSTANTIN S. ZAITSEV, NATALYA P.POPOVA
Abstract:	The purpose of the solutions, proposed in the article, is further enhancement of reliability of mathematical and program support of modern computer systems which require accurate calculations in ill-conditioned problems by step by step control of the priori error. For this purpose, a computational method for calculating the frequency response of the system, based on the reduction of the real Schur form of the initial matrix of coefficients of the system to a triangular form of the general form using orthogonal similarity transformation, has been developed. Next, the obtained matrix by permutations is transformed into a new triangular form, in the lower part of the main diagonal of which the multiple eigenvalues are placed. The value of the matrix frequency response for each predefined frequency value is found as the solution of a system of linear algebraic equations with a triangular coefficient matrix with an extracted diagonalizable submatrix for multiple eigenvalues. A computational algorithm for calculating the matrix frequency response of the system is presented. A comparative assessment of the computational cost in the proposed method and the method, based on the Hessenberg form, is conducted in the problem of calculating the frequency response of the system. The article shows an obvious advantage in the complexity of computations in the absence of multiple eigenvalues, which can be assessed as a linear function of the dimension of the matrix, over the quadratic dependence for an alternative method. In the absence of multiple eigenvalues the proposed method is not inferior in performance to the method based on the Hessenberg form.
Keywords:	Frequency Response, Schur Form, Hessenberg Form, Computational Methods, Linear System
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text

Title:	BOUNDARY VALUE PROBLEM FOR A B-HYPERBOLIC EQUATION WITH AN INTEGRAL CONDITION OF THE SECOND KIND
Author:	NATALYA VLADIMIROVNA ZAITSEVA
Abstract:	In the paper we consider the boundary value problem with an integral condition of the second kind for a hyperbolic partial differential equation of the second order with the Bessel operator. We prove the uniqueness of the solution of the problem. In the paper we use the apparatus of the theory of partial differential equations and ordinary differential equations, methods of functional analysis, the apparatus of special functions. While solving the problem, we obtain some restrictive conditions on the functions that define the initial data of the problem. The solution of the problem is obtained explicitly, as a series, using the variable separation method. The substantiation of the solution is carried out by the method of spectral expansions. The work is theoretical.
Keywords:	Hyperbolic Equation, Nonlocal Integral Condition, Bessel Operator.
Source:	Journal of Theoretical and Applied Information Technology 31^st August 2015 -- Vol. 78. No. 3 -- 2015
Full Text