Статьи журнала - International Journal of Modern Education and Computer Science
Все статьи: 1064
Comparative study of inspired algorithms for trajectory-following control in mobile robot
Статья научная
This paper is devoted to the design of a trajectory-following control for a differentiation nonholonomic wheeled mobile robot. It suggests a kinematic nonlinear controller steer a National Instrument mobile robot. The suggested trajectory-following control structure includes two parts; the first part is a nonlinear feedback acceleration control equation based on back-stepping control that controls the mobile robot to follow the predetermined suitable path; the second part is an optimization algorithm, that is performed depending on the Crossoved Firefly algorithm (CFA) to tune the parameters of the controller to obtain the optimum trajectory. The simulation is achieved based on MATLAB R2017b and the results present that the kinematic nonlinear controller with CFA is more effective and robust than the original firefly learning algorithm; this is shown by the minimized tracking-following error to equal or less than (0.8 cm) and getting smoothness of the linear velocity less than (0.1 m/sec), and all trajectory- following results with predetermined suitable are taken into account. Stability analysis of the suggested controller is proven using the Lyapunov method.
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Статья научная
Dynamics of Malaria parasite diagnosis is complex and been widely studied. Research is on-going on the effects of climatic variations on symptomatic malaria infection. Malaria diagnosis can be asymptomatically or symptomatically low, mild and high. An analytical program is needed to detect individual malaria parasite counts from complex network of several infection counts. This study adopted the experimental malaria parasite counts collected from selected hospitals in Minna Metropolis, Niger State, Nigeria and Climatic data collected at the time the experiment was conducted from NECOP, Bosso, FUT Minna, Niger State, Nigeria. One thousand and two hundred (1,200) experimental data were collected and two classifiers Support Vector Machine (SVM), Artificial Neural Network (ANN) do the prediction. Experimental results indicated that SVM produced Accuracy 85.60%, Sensitivity 84.06%, Specificity 86.49%, False Positive Rate(FPr) 0.1351% and False Negative Rate(FNr) 0.1594% than Neural Network model of Accuracy 48.33%, Sensitivity 60.61%, Specificity 45.48%, low False Positive Rate (FPr) 0.5442% and False Negative Rate(FNr) 0.3939% as depicted in their respective confusion matrix.
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Comparing Elementary Students' Programming Success based on Programming Environment
Статья научная
In the Republic of Croatia Informatics is an elective course in elementary school for students from 5th to 8th grade. When it comes to programming language teachers can choose between BASIC and Logo. There are a lot of new programming environments for learning and teaching programming like Scratch and also new ways of teaching programming like game based learning. This study compares attitudinal and learning outcomes of 7th-grade students programming in Logo and Scratch. The classes were normal classes, non-extracurricular activities. The questionnaire is used to measure the attitude towards programming and programming languages. The test is constructed to measure learned programming concepts in both compared programming languages Logo and Scratch. Results showed that learning Scratch first can provide a better understanding of basic programming concept for novices in elementary school than Logo.
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Статья научная
This study aimed to compare 5th graders' scores obtained from Scratch projects developed in the framework of Information Technologies and Software classes via Dr Scratch web tool with the scores obtained from Computational Thinking Levels Scale and to examine this comparison in terms of different variables. Correlational research model was utilized in the study that 31 students participated in. Students were taught basic programming by using Scratch during a 6-week period. At the end of training, students' programming skills were measured via Dr. Scratch web tool. Computational thinking skills were measured using Computational Thinking Levels Scale which includes 5 factors: creativity, problem solving, algorithmic thinking, collaboration and critical thinking. Data were analyzed for internal reliability to calculate scale reliability. Cronbach Alpha reliability coefficient was found to be 0.809. It was found that scores obtained by students by using any of the measurement tools did not differ according to gender or period of computer use, however, a high level significant relationship was observed between students' programming skills with Scratch and their computational thinking skills.
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Статья научная
This article discusses the findings of a study that elucidated users’ acceptance of two management systems for key performance indicators (KPIs) in terms of their usefulness and ease of use scores at a higher education institution in Malaysia. The two management systems were Key Performance Indicators Monitoring System (KPI-MS) and Excel Spreadsheet System (ESS). ESS is a system developed using Microsoft Excel and has been in used since the year 2008 in the institution to calculate KPIs marks. The ESS system, however, has several shortcomings, and the KPI-MS system was developed with the intention to replace ESS. KPI-MS is an online KPI performance monitoring system which allows users to access the system wherever and whenever they want using a web browser. In addition, KPI-MS is designed as an intelligent system that is able to process raw data automatically to produce results that can be easily visualized in a graphical manner. A survey questionnaire was used to collect data on the acceptance of both systems. A total of 78 participants who were involved in KPI data processing from all 42 schools and centres in the higher education institution in Malaysia participated in this study. The instrument of this study was adapted and modified from Davis’ Technology Acceptance Model (TAM). This instrument was content-validated by three experts in the related field and the reliability index computed with Cronbach alpha was 0.955. A descriptive analysis was conducted to compare the mean scores of both KPI-MS and ESS rated by the users. The results showed that the users rated KPI-MS as a very useful system in monitoring KPI performance of their schools or centres compared to ESS. Also, users rated the KPI-MS to be significantly easier (p≤0.01) and more enjoyable to use. In conclusion, it is recommended that KPI-MS should replace the ESS system in managing KPIs data.
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Comparison Analysis of AHP-SAW, AHP-WP, AHP-TOPSIS Methods in Private Tutor Selection
Статья научная
Private tutoring was a non-formal education, it was used as an alternative by parents to help support and maximize the learning process that students get at school. Sometimes parents have difficulty in adjusting the desired and needed criteria with available alternatives or teachers. To overcome these obstacles, this research used the MADM approach in providing alternative recommendations, based on the criteria used as the basis for decision making. MADM consists of SAW, WP, TOPSIS, and AHP. The advantages of the SAW, WP, and TOPSIS methods in managing cost and benefit data were used in the ranking process. While the weaknesses of the three methods in the weighting process can be overcome by the AHP method, which was able to provide more objective weighting results. Therefore, this research aimed to analyze the comparison of the combination of AHP-SAW, AHP-WP, and AHP-TOPSIS methods in the selection of private tutors. The combination of these methods was compared based on accuracy, ranking, and preference to get the best combination of MADM methods in determining the selection of private tutors. The criteria used in this research were education, experience, cost, duration, rating, and distance. The comparison of the three combinations of methods showed the AHP-SAW method has an accuracy rate of 88.14%, AHP-WP of 68.64%, and AHP-TOPSIS of 66.95%. The average ranking showed the AHP-SAW method gave results of 91%, AHP-WP of 88%, and AHP-TOPSIS of 89%. In addition, the average preference showed the AHP-SAW method gave a value of 0.771, AHP-WP of 0.073, and AHP-TOPSIS of 0.564. Thus, it showed the AHP-SAW gave better results in the case of private tutor selection than the AHP-WP and AHP-TOPSIS.
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Comparison and Evaluation of Intelligence Methods for Distance Education Platform
Статья научная
In this paper two favorite artificial intelligence methods: ANN and SVM are proposed as a means to achieve accurate question level diagnosis, intelligent question classification and updates of the question model in intelligent learning environments such as E-Learning or distance education platforms. This paper reports the investigation of the effectiveness and performances of two favorite artificial intelligence methods: ANN and SVM within a web-based environment (E-Learning) in the testing part of an undergraduate course that is "History of Human Civilizations" to observe their question classification abilities depending on the item responses of students, item difficulties of questions and question levels that are determined by putting the item difficulties to Gaussian Normal Curve. The effective nesses of ANN and SVM methods were evaluated by comparing the performances and class correct nesses of the sample questions using the same 3 inputs as: item responses, item difficulties, question levels to 5018 rows of data that are the item responses of students in a test composed of 13 questions. The comparative test performance analysis conducted using the classification correctness revealed yielded better performances than the Artificial Neural Network (ANN) and Support Vector Machine (SVM).
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Comparison of ANFIS with MLP ANN in Measuring the Reliability based on Aspect Oriented Software
Статья научная
In fact, Reliability as the qualities metric is the probability success or The probability that a system or set of tasks without failure for a specified constraints of time and space, as specified in the design and operating conditions specified temperature, humidity, vibration and action. A relatively new methodologies for developing complex software systems engineering is an aspect-oriented software systems, that provides the new methods for the separation of concerns multiple module configuration or intervention and automatic integration them with a system. In this paper, using MLP artificial neural networks and adaptive fuzzy neural network assess the reliability of the aspect oriented software and at the end, two methods were compared with each other. After examination, the root means square error method based on artificial neural networks, fuzzy neural network-based method of 0.024262 and 0.021874 to be adaptive. The results show that the method is based on adaptive fuzzy neural networks with low error in the estimation of reliability, performance is better than the MLP artificial neural network approach.
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Comparison of Requirement Prioritization Techniques to Find Best Prioritization Technique
Статья научная
This paper describes an assessment of different requirement prioritization techniques (binary search tree, AHP, hierarchy AHP, spanning tree matrix, priority group/Numerical Analysis, bubble sort, MoSoW, simple ranking and Planning Game) on the basis of previous literature. Five research papers and thesis are critically reviewed, in order to select best requirement prioritization method. The study of literature shows that AHP is the best requirements prioritization technique amongst all the requirements prioritization techniques. It provides the most efficient and reliable results which are on ratio scale. It is fault- tolerant and provides a consistency check.
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Статья научная
The development of methods for assessing lecturers' performance is needed to motivate lecturers to achieve institutional targets. Currently, lecturers are required to be able to adapt to the rapid development of technology. Lecturer performance assessment must be done periodically. Competence is measured as a basis for planning resource development activities. The method that is often used for assessing lecturer performance is the Simple Additive Weighting (SAW) method. However, the SAW method has drawbacks, namely 1) the process of determining criteria is only carried out by the leadership (subjective); 2) The SAW method can only be applied to multi-criteria data ; 3) Data ranking problems. Based on this deficiency, a new method was built, namely, the Weighted Performance Indicator (WPI) method using respondents’ opinion to determine the criteria. This study aims to compare the performance of the two methods. Testing criteria using SPPS application dan WPI method, while testing methods utilized the SAW method and the WPI method. The results of the criterion test show the Percentage of Similarity of data validity = 96.7 % witht the minimum percentage limit (MPL) = 40%. While the results of the SAW method and WPI method testing resulted in the highest score in the 13th alternative, namely SAW score (v13) = 793.76 and WP score (WP13) = 0.928, and the lowest value in the 30th alternative, SAW score (v30) = 18.60 and WP score (WP30) = 0.140. the ranking positions in these two methods show similarities. However, for other alternatives, the rating value can be different. The WPI method is a scientific development in the field of decision support systems that can be applied to other performance assessments, such other human resources, system performance assesment etc. The results of this study prove that the WPI method can be used as a performance assessment method with different characteristics from the SAW method.
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Computational Approach to Image Segmentation Analysis
Статья научная
Image division refers to the way toward dividing an advanced picture into various portions. Image division says to a parcel of an image into various divisions that are homogeneous or comparable. The objective of the division is to Simplify or potentially changes the portrayal of an image into something that is more important and simpler to dissect. Advancement of precise image division different image division strategies is utilized to take care of a particular issue. The motivation behind this survey is to give an overview of various image division methods. These methods are sorted into four sorts: an) Edge based division b) Threshold Segmentation c) Clustering-based division D) Region-based division. This survey tended to different image division methods, their correlation and presents the issues identified with those procedures.
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Computer Forensics and Image Deblurring: An Inclusive Investigation
Статья научная
Observed images with bare eyes are always different than the acquired ones using an imaging system since the captured images are considered as the degraded versions of the original scene. These degradations may vary between image noise, lighting defects and blur. Therefore, this article addresses the field of computer forensics with image deblurring as the latent details that are indeed present in the captured images are concealed due to the blurring artifact. Moreover, the constant types of blur that are being dealt with in forensics are the motion and the out-of-focus blur. The motion blur occurs due to the motion of the recorded objects or the camera during the capturing process. The out-of-focus blur occurs due to lens defocusing errors. Different examples are provided to focus on the importance of deblurring forensic images. In addition, concise commentaries on deblurring methods, applications and blur types are deliberated for additional knowledge.
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Computer Modeling and Simulations of Logic Circuits
Статья научная
In thе article are presented possibilities of computer modeling and simulations of logic circuits using the software CircuitMaker. CirciutMaker is one of the widely used software product for quick and easy synthesis and simulating the work of the various electronic circuits. By using CirciutMaker are created logical elements and synthesized logic circuits such as decoders, multiplexers, counters, programmable logic device, etc., that allow conducting computer simulations and experiments to solve specific experimental tasks. The work of the shown circuits is illustrated with the time-impulse diagrams. The application of the software product CirciutMaker for students who study the course "Analysis and synthesis of logic circuits" is also considered. The computer modeling and the simulations of logic circuits can be used in the lectures and in the laboratory exercises on the course "Analysis and synthesis of logic circuits" to conduct computer (virtual) interactive experiments.
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Computer Simulation Instruction: Carrying out Chemical Experiments
Статья научная
The purpose of this study was to investigate the effect of computer simulation Instruction (CSI) on students' achievements: Carrying out chemical experiments to acquire chemical concepts for eleventh grade students. The subject of the study consisted two sections of a one girl's high school in Jordan. One section was randomly assigned to experimental group in which computer simulation Instruction (CSI) was used, and the other section was randomly assigned to control group in which students were instructed by using the traditional teaching instruction. The findings indicated that there is progress on the part of the experimental group which used the computer simulation Instruction (CSI) and this was reflected positively in the students’ achievement in carrying out chemical experiments to acquire chemical concepts.
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Статья научная
The purpose of this research study is to examine the impact of Computer Studies among teachers and students of secondary schools in Umuahia North Local Government Area of Abia State, especially as it affects the teaching and learning process. The authors adopted a descriptive survey design for this study using four research questions which were formulated based on the purpose of the research. The results of the study indicate that Computer Studies has positive impact in the teaching and learning process in secondary schools in Umuahia North Local Government Area of Abia State, Nigeria. From the findings, the computer literacy level of the students was found to be low while that of the teachers was slightly higher than that of the students. The results of the study also show that equipment and infrastructure such as computers and other information and communication technology (ICT) facilities are also needed in schools to facilitate the acquisition of basic computer skills among teachers and students in secondary schools and thereby increase their computer literacy level.
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Computer science program in moroccan secondary schools: curricula analysis
Статья научная
The methodology of teaching informatics is a reflection subject that arouses increasing interest both locally and internationally. Debates on the curricula of the discipline are always at the center of many discussions amongst computer scientists and other concerned educators. Teaching Computer science in secondary schools is increasingly perceived as having similar status like teaching mathematics, life and earth sciences, chemistry, and physics. In this paper we report and analyze the current status of computer science education in Moroccan secondary schools in light of the governing official instructions by the ministry of education. We also discuss the generalization of computer education in Moroccan secondary schools probing the emergence of teaching it as a disciplinary subject rather than a tool in other fields. Our analysis shows that teaching informatics in Morocco is not conform to the set ministerial objectives and it necessitate a reform in both its teaching methodology and content.
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Computing the Bodies Motions in the Space and Long-term Changes in the Earth's Climate
Статья научная
The paper considers various aspects of the interaction and movement of bodies. The stability of the Solar system by the example of the evolution of the Mars orbit for 100 million years is shown. The optimal motion of the spacecraft to the vicinity of the Sun is considered. The results of an exact solution to the problem of the interaction of N bodies, which form a rotating structure, are presented. It is shown the evolution of two asteroids: Apophis and 1950DA, as well as ways to transform them into Earth satellites. The cause of the excess rotation of the Mercury perihelion is explained. The examples of the simulation of globular star clusters are given. As a result of the interaction of the bodies of the Solar System, the parameters of the orbital and rotational motions of the Earth change. This change leads to a change in the distribution of solar heat over the surface of the Earth. In contrast to the works of previous authors, a new understanding of the evolution of the orbital and rotational motions of the Earth has been obtained. In particular, it has been established that the Earth's orbit and its axis of rotation precess relative to different directions in space. The paper compares the distribution of the amount of the solar heat, i.e. insolation, on the surface of the Earth in different epochs. The insolation periods of climate change are shown. They coincide with the known changes of the paleoclimate. The changes in insolation for different time intervals, including for 20 million years ago, are given. Changes in insolation in the contemporary epoch and in the next million years are also shown. Sunrises and sunsets are also evolving. The duration of the polar days and nights in different epochs is given in the distribution by latitude. The paper popularly acquaints readers with the latest scientific results and is useful for students and graduate students to choose topics for their term papers and dissertations.
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Conditions on Structural Controllability of Nonlinear Systems: Polynomial Method
Статья научная
In this paper the structural controllability of a class of a nonlinear system is investigated. The transfer function (matrix) of nonlinear systems is obtained by putting the nonlinear system model on non-commutative ring. Conditions of structural controllability of nonlinear systems are presented according to the criterion of linear systems structural controllability in frequency domain. An example is used to testify the presented conditions finally.
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Contemporary Developments in Wireless Sensor Networks
Статья научная
Wireless Sensor Networks (WSN) since their inception, a decade ago, have grown well in research and implementation. In this work the developments in WSNs are reported in three sub areas of wireless sensor networks that is, wireless sensor node (hardware and software), Communication & Networking issues in WSNs and application areas. WSNs are characterized by huge data hence research work in aggregation & mining is also discussed. Contemporary issues of integration of WSNs with other prevalent networks, sensor enabled smartness and role of artificial intelligence methods is elaborated. Insight into future directions & research avenues in all the above areas is provided.
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Contemporary Trends in Defect Prevention: A Survey Report
Статья научная
Most of the software projects fail to meet the desired level of quality and standards due to different types of defects introduced during the course of requirement solicitation, designing and development. These defects inexorably hinder the secure deployment or smooth operations of the software systems. One of the key reasons for this misfortune is the lack of proper defect prevention planning while formulating the software architecture. Defect prevention needs to be a thorough and critical phase because it has a direct impact on quality of the product which cannot be compromised. This paper looks into different defect prevention techniques and analyses them critically. The scope of this study is restricted to the identification of the modern trends in defect prevention.
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