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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korea Society of Computer and Information
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Korean Society of Computer Information
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Volume & Issues
Volume 20, Issue 12 - Dec 2015
Volume 20, Issue 11 - Nov 2015
Volume 20, Issue 10 - Oct 2015
Volume 20, Issue 9 - Sep 2015
Volume 20, Issue 8 - Aug 2015
Volume 20, Issue 7 - Jul 2015
Volume 20, Issue 6 - Jun 2015
Volume 20, Issue 5 - May 2015
Volume 20, Issue 4 - Apr 2015
Volume 20, Issue 3 - Mar 2015
Volume 20, Issue 2 - Feb 2015
Volume 20, Issue 1 - Jan 2015
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Wi-Fi Directional Test Simplification for Smart Set-Top Box Based on Pair-Wise Testing
Lee, Jae-Chul ; Kim, Yoon ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 1~8
DOI : 10.9708/jksci.2015.20.3.001
The most used smart set-top box in home driven by the Android OS and based on Wi-Fi technology has to ensure nothing wrong with the Wi-Fi service regardless of the various user`s installation environment. The direction test method about the nondirectional of the Wi-Fi doesn`t be determined as the standard and each manufacturers devise the their own test methods and conduct the tests. In this paper, we created the 720 test cases considering 2 components of upload & download, the 10 elements of the vertical angle and the 36 elements of the horizontal angle looking at the wireless router in order to verify omni-directional Wi-Fi capability. In reality, from viewpoint in terms of cost and time constraint, it is difficult to test all the test cases. Therefore, we decided to reduce test cases by applying Pair-wise testing technique which is one of combinational testing techniques based on ISO / IEC 29119-4. And we obtained the test cases in which the Pair-wise technique was applied by Allpairs tool which output test cases automatically and conducted the test. It could be confirmed that the proposed technique shortened 48.61% of the time to be spent in progressing the existing test cases and that the trace about the part in which the problem was generated with the result of the simplified test case was possible enough.
An Ontology-Based Hazard Analysis and Risk Assessment for automotive functional safety
Roh, Kyung-Hyun ; Lee, Keum-Suk ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 9~17
DOI : 10.9708/jksci.2015.20.3.009
The ISO 26262 standard requires a preliminary hazard analysis and risk assesment early in the development for automotive system. This is a first step for the development of an automotive system to determine the necessary safety measures to be implemented for a certain function. In this paper, we propose an ontology-based hazard analysis and risk assessment method for automotive functional safety. We use ontology to model the hazard and SWRL(Semantic Web Language) to describe risk analysis. The applicability of the proposed method is evaluated by the case study of an ESCL(electronic steering column lock) system. The result show that ontology deduction is useful for improving consistency and accuracy of hazard analysis and risk assessment.
Learning Wind Speed Forecast Model based on Numeric Prediction Algorithm
Kim, Se-Young ; Kim, Jeong-Min ; Ryu, Kwang-Ryel ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 19~27
DOI : 10.9708/jksci.2015.20.3.019
Technologies of wind power generation for development of alternative energy technology have been accumulated over the past 20 years. Wind power generation is environmentally friendly and economical because it uses the wind blowing in nature as energy resource. In order to operate wind power generation efficiently, it is necessary to accurately predict wind speed changing every moment in nature. It is important not only averagely how well to predict wind speed but also to minimize the largest absolute error between real value and prediction value of wind speed. In terms of generation operating plan, minimizing the largest absolute error plays an important role for building flexible generation operating plan because the difference between predicting power and real power causes economic loss. In this paper, we propose a method of wind speed prediction using numeric prediction algorithm-based wind speed forecast model made to analyze the wind speed forecast given by the Meteorological Administration and pattern value for considering seasonal property of wind speed as well as changing trend of past wind speed. The wind speed forecast given by the Meteorological Administration is the forecast in respect to comparatively wide area including wind generation farm. But it contributes considerably to make accuracy of wind speed prediction high. Also, the experimental results demonstrate that as the rate of wind is analyzed in more detail, the greater accuracy will be obtained.
SPARQL-DL Processor to Extract OWL Ontologies from Relational Databases
Choi, Ji-Woong ; Kim, Myung-Ho ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 29~45
DOI : 10.9708/jksci.2015.20.3.029
This paper proposes an implementation of SPARQL-DL, which is a query language for OWL ontologies, for query-answering over the OWL ontologies virtually generated from existing RDBs. The proposed SPARQL-DL processor internally translates input SPARQL-DL queries into SQL queries and then executes the translated queries. There are two advantages in the query processing method. First, another repository to store OWL ontologies generated from RDBs is not required. Second, a large ABox generated from an RDB instance is able to be served without using Tableau algorithm based reasoners which have a problem in large ABox reasoning. Our algorithm for query rewriting is designed to create one corresponding SQL query from one input SPARQL-DL query to minimize the overhead by establishing connections with RDBs.
Predicting Interesting Web Pages by SVM and Logit-regression
Jeon, Dohong ; Kim, Hyoungrae ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 47~56
DOI : 10.9708/jksci.2015.20.3.047
Automated detection of interesting web pages could be used in many different application domains. Determining a user`s interesting web pages can be performed implicitly by observing the user`s behavior. The task of distinguishing interesting web pages belongs to a classification problem, and we choose white box learning methods (fixed effect logit regression and support vector machine) to test empirically. The result indicated that (1) fixed effect logit regression, fixed effect SVMs with both polynomial and radial basis kernels showed higher performance than the linear kernel model, (2) a personalization is a critical issue for improving the performance of a model, (3) when asking a user explicit grading of web pages, the scale could be as simple as yes/no answer, (4) every second the duration in a web page increases, the ratio of the probability to be interesting increased 1.004 times, but the number of scrollbar clicks (p
Target Geolocation Method Using Target Detection in Infrared Images
Kim, Jae-Hyup ; Jeong, Jun-Ho ; Seo, Jeong-Jae ; Lee, Jong-Min ; Moon, Young-Shik ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 57~67
DOI : 10.9708/jksci.2015.20.3.057
In this paper, we proposed the geolocation method using target detection information in infrared images. Our method was applied to geolocation system of hostile targets in ground-to-ground field. The major distortion that has bad effect of geolocation was composed of optic, topography, GPS(Global Positioning System) and IMU(Inertial Measurement Unit) of reconnaissance unit. We proposed enhanced geolocation method to cope with optic and topography distortion using polynomial fitting and slant-range calculation model to overcome earth curvature problem, and the result showed that the performance of our method was good for system requirements.
Experimental Proof for Symmetric Ramsey Numbers
Lee, Sang-Un ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 69~74
DOI : 10.9708/jksci.2015.20.3.069
This paper offers solutions to unresolved
problems of Ramsey`s number. The Ramsey`s number R(s,t) of a complete graph
dictates that n-1 number of incidental edges of a arbitrary vertex
is dichotomized into two colors: (n-1)/2
A Study on the Definition of Security Requirements of Vulnerability Management in Analysis Step
Shin, Seong-Yoon ; Lee, Hyun-Chang ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 75~80
DOI : 10.9708/jksci.2015.20.3.075
Vulnerability management is in compliance with security policies, and then, this is to ensure the continuity and availability of the business. In this paper, the application vulnerability management and IT infrastructure of the system is that it must be identified. And a viable vulnerability management plan should be drawn from the development phase. There are many that are not defined vulnerability in the area of identification and authentication, encryption, access control in identification and classification of vulnerabilities. They define the area without missing much in technical, managerial, and operational point of view. Determining whether the response of the identified vulnerability, and to select a countermeasure for eliminating the vulnerability.
A study on the classification systems of domestic security fields
Jeon, Jeong-Hoon ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 81~88
DOI : 10.9708/jksci.2015.20.3.081
Recently the Security fields is emerged as a important issue in the world, While a variety of techniques such as a Cloud Computing or a Internet Of Things appeared. In these circumstances, The domestic security fields are divided into the Information Security, the Physical Security and the Convergence Security. and among these security fields, Convergence security is attracted much attention from various industries. the classification systems of a new field Convergence Security has become a very important criteria such about the Statistics calculation, the Analysis of status industry sector and the Road maps. However, In the domestic, The related institutions classified each other differently the Convergence Security Classification. so it is urgently needed a domestic security fields systematic classification due to the problems such as lack of reliability of the accuracy, compatibility of a data. Therefore, this paper will be analyzed to the characteristics of the domestic security classification systems by the cases. and will be proposed the newly improved classification system, to be possible to addition or deletion of an classification entries, and to be easy expanded according to the new technology trends. this proposed to classification system is expected to be utilized as a basis for the construct of a domestic security classification system in a future.
Recognition of Basic Motions for Figure Skating using AHRS
Kwon, Ki-Hyeon ; Lee, Hyung-Bong ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 89~96
DOI : 10.9708/jksci.2015.20.3.089
IT is widely used for biomechanics and AHRS sensor also be highlighted with small sized characteristics and price competitiveness in the field of motion measurement and analysis of sports. In this paper, we attach the AHRS to the figure skate shoes to measure the motion data like spin, forward/backward, jump, in/out edge and toe movement. In order to reduce the measurement error, we have adopted the sensors equipped with Madgwick complementary filtering and also use Euler angle to quaternion conversion to reduce the Gimbal-lock effect. We test and experiment the accuracy and execution time of the pattern recognition algorithms like PCA, ICA, LDA, SVM to show the recognition possibility of it on the basic motions of figure skating from the 9-axis trajectory information which is gathered from AHRS sensor. From the result, PCA, ICA have low accuracy, but LDA, SVM have good accuracy to use for recognition of basic motions of figure skating.
Research on the Implementation of Infrared Threat Surrogate for DIRCM Performance Analysis
Chun, Seung-Woo ; Kim, Joy ; Cho, Soo-Hyung ; Kim, Jae-Hyup ; Yu, Hyun-Geun ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 97~106
DOI : 10.9708/jksci.2015.20.3.097
In this paper, the development of infrared threat surrogate system is described and it can be used to verify the performance of DIRCM system. In this research, threat surrogates are manufactured using same F# and reflective optics used in 1st- and 2nd-Gen. real seeker so that the threat surrogate system can be used to develop code-based jamming techniques. Also the threat surrogate system can analyze the saturation jamming effect for image seeker using FPA detector. The result shows that 1st- and 2nd-generation threat surrogates have relatively precise tracking performance and jamming effect.
An Algorithm for Minimum Feedback Edge Set Problem
Lee, Sang-Un ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 107~113
DOI : 10.9708/jksci.2015.20.3.107
This paper presents a polynomial time algorithm to the minimum cardinality feedback edge set and minimum weight feedback edge set problems. The algorithm makes use of the property wherein the sum of the minimum spanning tree edge set and the minimum feedback edge set equals a given graph`s edge set. In other words, the minimum feedback edge set is inherently a complementary set of the former. The proposed algorithm, in pursuit of the optimal solution, modifies the minimum spanning tree finding Kruskal`s algorithm so as to arrange the weight of edges in a descending order and to assign cycle-deficient edges to the maximum spanning tree edge set MXST and cycle-containing edges to the feedback edge set FES. This algorithm runs with linear time complexity, whose execution time corresponds to the number of edges of the graph. When extensively tested on various undirected graphs both with and without the weighed edge, the proposed algorithm has obtained the optimal solutions with 100% success and accuracy.
Highly Reliability Network Technology for Transmitting a Disaster Information
Kim, Kyung-Jun ; Kim, Dongju ; Jang, Dae-Jin ; Oh, Eun-Ho ; Kim, Jin-Man ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 115~124
DOI : 10.9708/jksci.2015.20.3.115
In this paper we analyse the previous (Quality of Services) and QoE(Quality of Experience) methods, and propose a high reliable network system framework and its service forwarding method that is able to provide seamless N-Screen services for proliferating disaster informations. The service satisfaction measurement, i.e., QoE, of contents consumers in N-screens services is going to be important the factor in disaster information proliferation because N-Screen services in the previous methods based on multi devices only focused on information transmission. The proposed system around these services is composed of a disaster information process framework for accepting user`s service requirement, push service modules for minimizing the number of packets to be caused when carrying out the push service, and a push service controller for maximizing QoE measures. In order to provide a seamless N-Screen service on diverse screens, such as smartphone, PC, and big screen, we also have Open API(Application Programming Interface) functions. Through these results, we expect to evaluate QoS and QoE quality in the seamless N-Screen service.
An Investigation of the Impacts of Employer`s Rewards Strategies on Employee`s Commitment with Comparison of Home-based Contact Center
Kim, Jae-Young ; Cho, Boo-Yun ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 125~137
DOI : 10.9708/jksci.2015.20.3.125
Information technology enables home-based working which is a new way to satisfy the firm and its employees. Firms are under pressure of cost reduction, and employees want to maintain balance of life between work and family. Considering the organization`s capability can be the core competency, firm`s efforts to acquire workers` commitment have been important issue in human resource management. However, researches to increase the workers` loyalty and commitment within home-base working have not been widely studied. This study tries to identify the relationships among firms` rewards supporting strategies and workers` perceived commitment with the working system as a context. Results confirm that the organization`s extrinsic and intrinsic rewards affect the worker`s continuous commitment, and the mediating role of normative commitment between workers` perceived affective commitment and continuous commitment has been found. Also, we empirically identify the moderating role of working systems(i.e., home-based, vs. office-based) within organization`s rewards supporting strategies and workers` commitment perceptions.
Fashion Glasses: Marketing Service Activation Strategy to Intensify the product in On-line Environment
Shin, Seong-Yoon ; Lee, Hyun-Chang ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 139~144
DOI : 10.9708/jksci.2015.20.3.139
Recently, to satisfy the customer`s requirements for glasses such as rating of glasses or choosing, glasses industry is supporting various types and tools for making one`s appearance good. Among various forms of online shopping with the development of online shopping and the rapid growth of IT technology, the intense competition also more deepen. The strategies for differentiated marketing and features for competitiveness of businesses in the online and offline shopping areas are required that our marketing target be settled the glasses marketing by analyzing. In this research, we study the strategy for implementing a site for glasses to customizing a person not to distinguish whether the customer is older or younger etc. For the purpose of implementing a site for glasses, first, we suggest a differentiated methodology through analysis of glasses industry service and features of existential representative glasses sites. Through the activation of the marketing strategies, marketing in a glasses market is expected to be competitive.
A Study on the Game Addiction of Children with Domestic Violence Experience
Kim, Na-Ye ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 145~156
DOI : 10.9708/jksci.2015.20.3.145
The aim of this study is to identify whether the domestic violence experience of children has an impact on their game addition and to verify the direct effects and moderating effects of social support. The survey was conducted to the children who were 5th and 6th graders in Gwangju and Jeonnam. The responses from 328 subjects of domestic violence experience from were analyzed. The analytic results are as the following. When verifying the impact of a domestic violence experience of children on their game addiction, domestict violence was found as the key variable that has a negative impact on children`s game addiction. The results indicated that children with higher levels of domestict violence more likely to have higher levels of game addiction. Furthermore, boy`s addiction degree to game was higher than girls` and lower education levels of mother, higher grades were found to be associated with higher game addiction. The impact of children`s social support on their game addiction was analyzed. The analytic results suggest that social support has a impact on their game addiction. In other words, higher social support means lower game addiction. The moderating effect of social support was analyzed. Social support check the moderating effect of domestic violence of children on their game addiction. The Implications of these findings were discussed.
A Research on the Control Effect of Teacher`s Support in the Course of School Adaptation for Children from Multi-cultural Families
Rho, Seon-Deok ; Kang, Gil-Hyun ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 157~167
DOI : 10.9708/jksci.2015.20.3.157
In this study, we studied the influence that the stress placed on children (originating from presence of two cultures at multi-cultural families) can have on adapting to school, and further assessed the control effect of teachers` support as a protection factor. In order to achieve the goal of the research, we identified samples of children between Grades 3-6 who came from multi-cultural families to carry out surveys. Based on the results of our analysis, the experience of discrimination and language conflicts experienced by children from multi-cultural families affected their academic activities (among adaptation factors to school experiences), while teachers` support appeared to have a control effect. However, for the influence of language conflicts on friend relationships (among adaptation factors to school experiences), teachers` support did not have a control effect. As such, based on this research result, we`ve proposed plans to improve school adaptation of children from multicultural families.
An Empirical Study on the Innovation Strategy of User Experience by Utilizing Digital Technology
Rho, Hyung-Jin ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 169~176
DOI : 10.9708/jksci.2015.20.3.169
The purpose of this paper is to study renovation plan of value chain from a user`s viewpoint by making practical application of digital technology. And it is surely meaningful to investigate the important motivation factors of continuous using smart-phone, and to analyze the improving effect toward to the quality of life in continuous using smart-phone. By this study we can expect the value improving effect of user experience. The results of hypothesis testing can be summarized as follows: First, the hypothesis that positive affect has a plus effect on pragmatic value is accepted. Secondly, the hypothesis that positive affect has a plus effect on hedonic value is accepted. Thirdly, the hypothesis that negative affect has a minus effect on pragmatic value is accepted. Fourthly, the hypothesis that negative affect has a minus effect on pragmatic value is rejected. Fifthly, the hypothesis that pragmatic value has a plus effect on life satisfaction is accepted. Sixthly, the hypothesis that hedonic value has a plus effect on life satisfaction is rejected. In the competition among enterprises, user experience instead of goods themselves became influential as a differential factor. And many advanced enterprises began taking a serious view of customer`s happiness and user experience improvement.
The Effects of Infant Teacher`s Job Characteristics on Job Satisfaction -Focusing on Moderating Effects of the Type of Institute-
Kim, Kyung-Sook ;
Journal of the Korea Society of Computer and Information, volume 20, issue 3, 2015, Pages 177~184
DOI : 10.9708/jksci.2015.20.3.177
This study aims to identify the effects of job factors related to children`s teachers on job satisfaction and present suggestions through an analysis of the modulating effects according to the type of institute. In order to achieve this purpose, this study set up a cause and effect model on teacher`s efficacy, emotional intelligence, friendship, and a reward system as factors of job satisfaction and analysed them based on interviews using a questionnaire. To look into the results of the analysis, it was discovered that a reward system had the greatest effect on job satisfaction for the subjects, followed by emotional intelligence, friendship, and teacher`s efficacy. In an analysis of modulating effects according to the type of institute, the effect of emotional intelligence differed significantly depending on kindergartens and day care centers. Teacher`s efficacy, friendship and a reward system were not significantly different. Based on the results above, this study provides basic data for the development of strategies for children`s teachers to effectively achieve job satisfaction.