Статьи журнала - International Journal of Modern Education and Computer Science
Все статьи: 968
The Use of Educational Web Tools: An Innovative Technique in Teacher Education Courses
Статья научная
With the increasing dependence on internet sources, educational web tools have offered teachers with various opportunities to investigate the most appropriate educational tools to suit their students' learning preferences. Undeniably, students in this digital age need to learn how to effectively and efficiently create, collaborate and share new information on the web through the use of different tools available on the web for lifelong learning. In response to this need, an empirical study on educational web tools as a technique to enhance student's learning was conducted. Hence, the aim of this paper was to determine the students' attitudes, skills and benefits they may have experienced during the conduct of their web tool activities in selected education subjects. The results showed that students demonstrate positive attitudes on the use of educational web tools. Results further revealed that the students' skills and the benefits they have experienced differ according to their attitudes toward the use of educational web tools in the subject. Based from the findings, conclusion has been drawn regarding the use of educational web tools to support the teaching-learning process.
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Статья научная
Most students especially at the secondary school level have little or no interest in the subject ‘Mathematics’. Mathematics teachers have sought for better ways to present the subject so as to captivate the interest of students in order to improve their performance in Mathematics. In this paper, the study on the assessment of multimedia technology method of teaching Mathematics in secondary schools was carried out in Abuja using a public and private secondary school at different locations. The students were taught using the multimedia technology method and the traditional chalk and talk method. The students taught with the multimedia method were termed the experimental group while the students taught with traditional method were termed the control group. Questionnaires were being distributed to the students to fill after which a post-test of the same questions was administered to the students. The responses from the questionnaire were analyzed using frequencies and percentages to find out the method of teaching the students preferred most. Also, the analysis of the post-test result with a paired sample t-test clearly showed there was a significant difference in the mean scores of both teaching methods. The multimedia technology teaching method impacted greatly on the interest and performance of the students in Mathematics.
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The circumstances in which modular programming becomes the favor choice by novice programmers
Статья научная
One of the key indicators for testing code quality is the level of modularity. Nevertheless, novice programmers do not always stick to writing modular code. In this study, we aim to examine the circumstances in which novice programmers decide to do so. To address this aim, two student groups, twenty each, were given a programming assignment, each in a different set-up. The first group was given the assignment in several stages, each add complexity to the previous one, while the second group was given the entire assignment at once. The students' solutions were analyzed using the dual-process theory, cognitive dissonance theory and content analysis methods to examine the extent of modularity. The analysis revealed the following findings: (1) In the first group, a minor increase in the number of modular solutions was found while they progressed along the stages; (2) The number of modular solutions of the second group was higher than of the first group. Analysis of students' justifications for lack of modularity in the first group revealed the following. The first stages of the problem were perceived as rather simple hence many students did not find any reason to invest in designing a modular solution. When the assignment got complex in the following stages, the students realized that a modular solution would fit better, hence a cognitive dissonance was raised. Nevertheless, many of them preferred to decrease the dissonance by continuing their course of non-modular solution instead of re-designing a modular new one. Students of both groups also attributed their non-modular code to lack of explicit criteria for the evaluation of the code quality that lead them to focus on functionality alone.
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The context of operations as the basis for the construction of ontologies of employment processes
Статья научная
The growing tempo of changes in world’s economics emphasizes the ability of enterprise to adapt to changes in business environment as an important competitive advantage. Adaptive intelligent enterprises, which use knowledge models for adaptation, form basis of cognitive economics. Currently those intelligent enterprises are utilizing ontological modeling for knowledge representation. In this article, a method for building ontology based on analysis of context of business operations is proposed. The application of this method is described in detail using recruitment area business process as example. The developed method of ontology construction allows for continuous ontology modification and update and accentuates the analysis of implicit context information.
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The effect of evolutionary algorithm in gene subset selection for cancer classification
Статья научная
The fact that reflects the cancer research consequences shows that still there are improvements that should be investigated in the stream of cancer in future. This leads the researchers to actively involve further in cancer research field. As an invention, a hybrid machine learning method is proposed in this study where two filters are assessed along with a wrapper approach. Typically, filters prioritize the features while, wrappers contribute in subset identification. Though both filters and wrappers exist independently, the excellent results they produce when applied subsequently. The wrapper-filter combination plays a major role in feature selection. Yet, incorporating with a best strategy for feature space analysis is crucial in this concern. Thus, we introduce the Evolutionary Algorithm in the proposed study to search through the feature space for informative gene subset selection. Though there are several gene selection approaches for cancer classification, many of them suffer from law classification accuracy and huge gene subset for prediction. Hence, we propose Evolutionary Algorithm to overcome this problem. The proposed approach is evaluated on five microarray datasets, where three out of them provide 100% accuracy. Regardless the number of genes selected, both filters provide the same performance throughout the datasets used. As a consequence, the Evolutionary Algorithm in feature space search is highlighted for its performance in gene subset selection.
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Статья научная
Engineering education plays a prominent role in the development of technologies, society, nation, production, economy and employment. It is the art of applying scientific and mathematical principles, and experience to produce a technical product or system to meet out a specific need in the society. Based on the literature, it was thought that implementation of a cooperative project-based education on electrical-electronics engineering students could contribute to their basic engineering skills, their cooperative learning, and their attitudes towards engineering education and occupation. The aim of this study was to reveal the effect of project-based cooperative studio studies on the occupational basic skills of electrical-electronics engineering students, cooperative learning, and their attitudes towards engineering occupation. The research is designed to be a study that is half-experimental and half-quantitative study and was composed of 42 students. Within the research, project-based cooperative studio studies were utilized by the experimental group while the control group had similar course requirements for six weeks, but their practice solely included the content of the Lab II course in the official curriculum. The resulting data was gathered using the Basic Electronics Skills Self-Effacement Scale, the Scale for Attitude towards Cooperative Learning, and the Scale for Attitude towards Engineering and Engineering Education. The results indicate that the project-based cooperative studio studies are contributing more meaningfully to students’ intermediate level electronics skills, and their attitudes towards cooperative learning and towards engineering occupation.
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The power of anonymization and sensitive knowledge hiding using sanitization approach
Статья научная
In recent day’s huge rapid growth of corporate industries professional are based on the online marketing. These markets are associated with millions of online transactions which contain the details of the items, number of items, price and additional information like working details, salary information and personal information. The customers associated with these transactions are concerned about privacy issues. This manuscript aims to concentrates more on the additional information about the customer apart from dealing with the items. More analysis helps in knowing the sensitive information about an individual. In this article two algorithms were used, out of which first algorithm has been used to hide the sensitive information about an individual and other proposed algorithm has been used to hide the sensitive transaction information. These algorithms are proposed based on k-Anonymity and association rule hiding techniques. A novel algorithm has been proposed for association rule hiding algorithm to reduce the side effects such as Sensitive item-set hiding failure, Non-sensitive misses, extra item-set generations and Database dissimilarities along with the reduction of running time and complexities through transaction deletion.
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The skyline operator for selection of virtual machines in mobile computing
Статья научная
The article provides a solution to the problem of placing mobile users’ queries (tasks or software applications) on a balanced virtual machine (VMs) developed on cloudlets placed near base stations of the Wireless Metropolitan Area Networks (WMAN) taking into account their technical capabilities. For this purpose, hierarchically structured architecture and algorithm based on cloudlets are proposed for the selection of virtual machines that provide the requirements (solution time and cost) to the solution of the user’s task. An approach to the optimal VM selection is proposed for the solution of Bi-Criteria selection out of set of VMs based on Skyline operator.
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Throughput and Delay Analysis of Database Replication Algorithm
Статья научная
Recently, (PDDRA) a Pre-fetching based dynamic data replication algorithm has been published. In our previous work, modifications to the algorithm have been suggested to minimize the delay in data replication. In this paper a mathematical framework is presented to evaluate mean waiting time before data can be replicated on the requested site. The idea is further investigated and simulation results are presented to estimate the throughput and average delay.
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Towards Improving Recommender System: A Social Trust-Aware Approach
Статья научная
Recommender systems have shown great potential to help users find interesting and relevant Web service (WS) from within large registers. However, with the proliferation of WSs, recommendation becomes a very difficult task. Social computing seems offering innovative solutions to overcome those shortcomings. Social computing is at the crossroad of computer sciences and social sciences disciplines by looking into ways of improving application design and development using elements that people encounter daily such as social networks, trust, reputation, and recommendation. In this paper, we propose a social trust-aware system for recommending Web services (WSs) based on social qualities of WSs that they exhibit towards peers at run-time, and trustworthiness of the users who provide feedback on their overall experience using WSs. A set of experiments to assess the fairness and accuracy of the proposed system are reported in the paper, showing promising results and demonstrating that our service recommendation method significantly outperforms conventional similarity-based and trust-based service recommendation methods.
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Towards MORK: Model for Representing Knowledge
Статья научная
Smart world needs intelligent system for effective and timely decision making. This is achieved only through a knowledge based system with functional knowledge representation units. In this paper, two models are proposed for representing knowledge. This process involves in getting the data and placing the information in the correct location. Logical notations are used for taking the clauses and graph is used for putting the entities. In Model one, the data is translated into logical statements using predicate logics, later the knowledge is stored in conceptual graph and retrieved. Whereas in Model two, the given information is translated using First Order Logic (FOL), by applying description logic concept rules are defined and as a result reasoning is done. Storage is done by using concept-relation graph. The main aims of our models are to have easy and simple access over the information. These models return the required exact answer, for the higher order query posted by the end user to the intelligent system.
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Towards Qualitative Computer Science Education: Engendering Effective Teaching Methods
Статья научная
An investigation into the teaching method(s) that can effectively yield qualitative computer science education in Basic Schools becomes necessary due to the Nigerian government policy on education. The government’s policy stipulates that every graduate of Basic Schools or UBE (Universal Basic education) should be computer literate. This policy intends to ensure her citizens are ICT (Information and Communication Technology) compliant. The foregoing thus necessitatesthe production of highly qualified manpower―grounded in computer knowledge―to implement the computer science education strand of the UBE curriculum. Accordingly, this research investigates the opinion of computer teacher-trainees on the teaching methods used while on training. Some of the teacher-trainees―that taught computer study while on teaching practice―were systematically sampled using “Purposive” sampling technique. The results show consensus in male and female teacher-trainees’ views; both gender agreed that all the teaching methods used, while on training, will engender effective teaching of computer study. On the whole, the mean performance ratings of male teacher-trainees were found to be higher than that of females. However, this is not in accord with the target set by Universal Basic Education Commission which intends to eliminate gender disparity in the UBE programme. The results thussuggestthe need for further investigation using larger sample.
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Towards Semantics-Aware Recommender System: A LOD-Based Approach
Статья научная
Recommender systems have contributed to the success of personalized websites as they can automatically and efficiently select items or services adapted to the user's interest from huge datasets. However, these systems suffer of issues related to small number of evaluations; cold start system and data sparsity. Several approaches have been explored to find solutions to related issues. The advent of the Linked Open Data (LOD) initiative has spawned a wide range of open knowledge bases freely accessible on the Web. They provide a valuable source of information that can improve conventional recommender systems, if properly exploited. In this paper, we aim to demonstrate that adding semantic information from LOD enhance the effectiveness of traditional collaborative filtering. To evaluate the accuracy of the semantic approach, experiments on standard benchmark dataset was conducted. The obtained results indicate that the accuracy and quality of the recommendation are improved compared with existing approaches.
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Towards to an Bio-inspired Orchestration of Mobile Learning Activities
Статья научная
This paper presents a new approach to a recommendation of learning activities adapted to the spatial and temporal context of each mobile learner. Indeed, the path traveled by the user during a field trip can be guided using the technique of passive collaborative filtering. This recommendation is based on the ACO (Ant Colony Optimization) algorithm, which represents a good model for swarm intelligence. For this reason, the structure of our mobile scenario is described as a graph where POIs (Point Of Interest) are represented by nodes and the arcs indicate the probability of moving between them. This recommendation system allows the orchestration of mobile learning according to the geographical location of learners and the historical of their activities. Our contribution is devised in three parts: (1) the creation of a mobile learning scenario based on POIs, (2) the adaptation of the ACO algorithm for the orchestration of paths taken by learners, and (3) the development of a recommender system that helps learners to better choose their paths during the field trip.
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Статья научная
Automated Vehicular System has become a necessity in the current technological revolution. Real Traffic sign detection and recognition is a vital part of that system that will find roadside traffic signs to warn the automated system or driver beforehand of the physical conditions of roads. Mostly, researchers based on Traffic sign detection face problems such as locating the sign, classifying it and distinguishing one sign from another. The most common approach for locating and detecting traffic signs is the color information extraction method. The accuracy of color information extraction is dependent upon the selection of a proper color space and its capability to be robust enough to provide color analysis data. Techniques ranging from template matching to critical Machine Learning algorithms are used in the recognition process. The main purpose of this research is to give a review based on methods and framework of Traffic Sign Detection and Recognition solution and discuss also the current challenges of the whole solution.
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Training Program Supporting Language Acquisition
Статья научная
This study was conducted to evaluate the effects of a parenting training program that supports language acquisition in early childhood. To reveal such an effect, an experimental research design including pre-test-post-test and retention test was applied respectively. Experimental and control groups were formed with the parents of 4-6 years old children attending pre-school education institutions. To assess the language development levels of the children, Peabody Picture-Vocabulary Test (PPVT) was applied during the pre-test phase; after the parental training, a post-test was applied; and a year later, a retention test was implemented alternately. Parents in the experimental group evaluated the program after the Parental Support Program (PSP). The personal characteristics of the study group and the opinions of the parents evaluating the training have been shown by using the frequency and percentages. Whether PPVT and PSP scores differ according to socio-demographic variables was analyzed by t-tests. In the end, there was a significant increase in the results of the post-test and retention test performed after parent training that supports language acquisition. This increase has been found to be significantly higher than the PPVT scores of children in the control group. Thus, we have determined that the parents have a positive attitude towards the training program. The results of the study also reveal that parenting training that supports children's language acquisition has a positive effect on children's language development.
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Traveling Transportation Problem Optimization by Adaptive Current Search Method
Статья научная
The adaptive current search (ACS) is one of the novel metaheuristic optimization search techniques proposed for solving the combinatorial optimization problems. This paper aimed to present the application of the ACS to optimize the real-world traveling transportation problems (TTP) of a specific car factory. The total distance of the selected TTP is performed as the objective function to be minimized in order to decrease the vehicle’s energy. To perform its effectiveness, four real-world TTP problems are conducted. Results obtained by the ACS are compared with those obtained by genetic algorithm (GA), tabu search (TS) and current search (CS). As results, the ACS can provide very satisfactory solutions superior to other algorithms. The minimum total distance and the minimum vehicle’s energy of all TTP problems can be achieved by the ACS with the distant error of no longer than 3.05%.
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Tuning Schema Matching Systems using Parallel Genetic Algorithms on GPU
Статья научная
Most recent schema matching systems combine multiple components, each of which employs a particular matching technique with several knobs. The multi-component nature has brought a tuning problem, that is to determine which components to execute and how to adjust the knobs (e.g., thresholds, weights, etc.) of these components for domain users. In this paper, we present an approach to automatically tune schema matching systems using genetic algorithms. We match a given schema S against generated matching scenarios, for which the ground truth matches are known, and find a configuration that effectively improves the performance of matching S against real schemas. To search the huge space of configuration candidates efficiently, we adopt genetic algorithms (GAs) during the tuning process. To promote the performance of our approach, we implement parallel genetic algorithms on graphic processing units (GPUs) based on NVIDIA’s Compute Unified Device Architecture (CUDA). Experiments over four real-world domains with two main matching systems demonstrate that our approach provides more qualified matches over different domains.
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Twitter benchmark dataset for arabic sentiment analysis
Статья научная
Sentiment classification is the most rising research areas of sentiment analysis and text mining, especially with the massive amount of opinions available on social media. Recent results and efforts have demonstrated that there is no single strategy can mutually accomplish the best prediction performance on various datasets. There is a lack of existing researches to Arabic sentiment analysis compared to English sentiment analysis, because of the unique nature and difficulty of the Arabic language which leads to shortage in Arabic dataset used in sentiment analysis. An Arabic benchmark dataset is proposed in this paper for sentiment analysis showing the gathering methodology of the most recent tweets in different Arabic dialects. This dataset includes more than 151,000 different opinions in variant Arabic dialects which labeled into two balanced classes, namely, positive and negative. Different machine learning algorithms are applied on this dataset including the ridge regression which gives the highest accuracy of 99.90%.
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Two Way Question Classification in Higher Education Domain
Статья научная
Question classification plays vital role in Question Answering (QA) systems. The task of classifying a question to appropriate class is performed to predict the question type of the natural language question. In this paper, initially we have presented a brief overview of classification approaches adapted by different question answering systems so far and then propose a two-way question classification approach for higher education domain which not only identifies focus word and question class but also reduces answer search space within corpus comprise of question-answer pair, adding to the classification accuracy. For precise semantic interpretation of domain keywords, a domain specific dictionary is constructed which primarily have four domain word type. Classified features are built upon domain attributes in the form of constraints. The experiment proved the efficiency for restricted domain, even though we used quite simplistic approach.
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