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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 19, Issue 12 - Dec 2014
Volume 19, Issue 11 - Nov 2014
Volume 19, Issue 10 - Oct 2014
Volume 19, Issue 9 - Sep 2014
Volume 19, Issue 8 - Aug 2014
Volume 19, Issue 7 - Jul 2014
Volume 19, Issue 6 - Jun 2014
Volume 19, Issue 5 - May 2014
Volume 19, Issue 4 - Apr 2014
Volume 19, Issue 3 - Mar 2014
Volume 19, Issue 2 - Feb 2014
Volume 19, Issue 1 - Jan 2014
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Real-time Video Playback Method for N-Screen Service Based on Windows Azure
Lee, Won-Joo ; Lim, Heon-Yong ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 1~10
DOI : 10.9708/jksci.2014.19.6.001
In this paper, we propose a real-time video playback scheme for the N-Screen service based on Windows Azure. This scheme creates several playback blocks based on the performance of each node by non-uniform splitting of the original video. To reduce transcoding-time, it allocates the playback blocks to a corresponding node by transcoding the playback blocks. Through the simulation, we show that it is more effective to use real-time video playback for the N-screen service than the previous method. The proposed scheme splits an AVI format 300MB source video with non-uniform playback blocks. It allocates the playback blocks to the heterogeneous node of Windows Azure, the commercial cloud system and measures of transcoding-time by transcoding non-uniform playback blocks to mp4 and Flv format. As a result, the proposed scheme improves the performance of the N-screen service based on Windows Azure compared to the previous uniform split strategy.
Extracting Muscle Area with ART2 based Quantization from Rehabilitative Ultrasound Images
Kim, Kwang-Baek ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 11~17
DOI : 10.9708/jksci.2014.19.6.011
While safe and convenient, ultrasound imaging analysis is often criticized by its subjective decision making nature by field experts in analyzing musculoskeletal system. In this paper, we propose a new automatic method to extract muscle area using ART2 neural network based quantization. A series of image processing algorithms such as histogram smoothing and End-in search stretching are applied in pre-processing phase to remove noises effectively. Muscle areas are extracted by considering various morphological features and corresponding analysis. In experiment, our ART2 based Quantization is verified as more effective than other general quantization methods.
Context-Aware Fusion with Support Vector Machine
Heo, Gyeong-Yong ; Kim, Seong-Hoon ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 19~26
DOI : 10.9708/jksci.2014.19.6.019
An ensemble classifier system is a widely-used multi-classifier system, which combines the results from each classifier and, as a result, achieves better classification result than any single classifier used. Several methods have been used to build an ensemble classifier including boosting, which is a cascade method where misclassified examples in previous stage are used to boost the performance in current stage. Boosting is, however, a serial method which does not form a complete feedback loop. In this paper, proposed is context sensitive SVM ensemble (CASE) which adopts SVM, one of the best classifiers in term of classification rate, as a basic classifier and clustering method to divide feature space into contexts. As CASE divides feature space and trains SVMs simultaneously, the result from one component can be applied to the other and CASE achieves better result than boosting. Experimental results prove the usefulness of the proposed method.
Design of Power Management System Supporting Automatic Detection and Cutoff of Standby Power for Enhancing User Convenience
Hong, Suk-Il ; Choi, Kwang-Soon ; Hong, Ji-Man ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 27~35
DOI : 10.9708/jksci.2014.19.6.027
A Power Management System(PMS), which provides the functions of automatic detection and cutoff of home appliances' standby power without user intervention, is presented in this paper. A client in this system measures the power consumption of a home appliance plugged in it and transmits the information to a server in real-time over a wireless network. The server analyzes the features of the power consumption of home appliances and detects if any home appliance consumes standby power. The detected standby power information is used to create the information of the home appliance and to build a database, which will finally offer the automatic detection and cutoff of the standby power without any configuration through user intervention.
Valence of Social Emotions' Sense and Expression in SNS
Hyun, Hye-Jung ; Whang, Min-Cheol ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 37~48
DOI : 10.9708/jksci.2014.19.6.037
Social emotion is being highlighted as an important factor of human life in terms of quality of communication as a variety of social networks are commonly used. To understand such social emotion, this study verifies and analyzes the significance of lexical meaning and expression of emotion basically for understanding of complex meaning of social emotion. The emotional expressions represented in SNS text messages, one of the major channel of communication, are examined in this study to create scales of meaning and expression and to understand the differences deeply. As a result of the analysis, it turned out that negative assessment factors were more than positive ones among social emotional factors while positive ones were outstandingly many in the case of social emotional expression. Social emotional factors were classified by basic emotional elements and valences while emotional expression included complex meaning and especially positive elements were dominant in general.
Clustering Algorithm for Efficient Energy Consumption in Wireless Sensor Networks
Na, Sung-Won ; Choi, Seung-Kwon ; Lee, Tae-Woo ; Cho, Yong-Hwan ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 49~59
DOI : 10.9708/jksci.2014.19.6.049
Recently, wireless sensor networks(WSNs) are widely used for intrusion detection and ecology, environment, atmosphere, industry, traffic, fire monitoring. In this paper, an energy efficient clustering algorithm is proposed. The proposed algorithm forms clusters uniformly by selecting cluster head that optimally located based on receiving power. Besides, proposed algorithm can induce uniform energy consumption regardless of location of nodes by multi-hop transmission and MST formation with limited maximum depth. Through the above, proposed algorithm elongates network life time, reduces energy consumption of nodes and induces fair energy consumption compared to conventional LEACH and HEED. The results of simulation show that the proposed clustering algorithm elongates network life time through fair energy consumption.
A Survey on Time Synchronization Protocols for Wireless Sensor Networks
Bae, Shi-Kyu ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 61~69
DOI : 10.9708/jksci.2014.19.6.061
Various Time Synchronization protocols considering for the characteristics of WSN(Wireless Sensor Network) have been developed, because a time relationship plays an important role in many WSN applications, as well. Synchronization accuracy as well as constraints of energy should be considered for WSN Time Synchronization protocols, especially. In this paper, I analyze Time Synchronization protocols for WSN after classifying these protocols with a new criteria (i.e. power consumption). So, this method will contribute to evaluating and comparing WSN Time Synchronization protocols in respect of power consumption.
Efficient Construction of Euclidean Minimum Spanning Tree Using Partial Polynomial-Time Approximation Scheme in Unequality Node Distribution
Kim, In-Bum ; Kim, Soo-In ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 71~80
DOI : 10.9708/jksci.2014.19.6.071
Employing PTAS to building minimum spanning tree for a large number of equal distribution input terminal nodes can be a effective way in execution time. But applying PTAS to building minimum spanning tree for tremendous unequal distribution node may lead to performance degradation. In this paper, a partial PTAS reflecting the scheme into specific node dense area is presented. In the environment where 90% of 50,000 input terminal nodes stand close together in specific area, approximate minimum spanning tree by our proposed scheme can show about 88.49% execution time less and 0.86%tree length less than by existing PTAS, and about 87.57%execution time less and 1.18% tree length more than by Prim's naive scheme. Therefore our scheme can go well to many useful applications where a multitude of nodes gathered around specific area should be connected efficiently as soon as possible.
A DTN Routing Protocol for Communications in Post-Disaster Scorched Earth Situations
Yoo, Dae-Hun ; Choi, Woong-Chul ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 81~92
DOI : 10.9708/jksci.2014.19.6.081
In this paper, we propose an efficient dynamic workload balancing strategy which improves the performance of high-performance computing system. The key idea of this dynamic workload balancing strategy is to minimize execution time of each job and to maximize the system throughput by effectively using system resource such as CPU, memory. Also, this strategy dynamically allocates job by considering demanded memory size of executing job and workload status of each node. If an overload node occurs due to allocated job, the proposed scheme migrates job, executing in overload nodes, to another free nodes and reduces the waiting time and execution time of job by balancing workload of each node. Through simulation, we show that the proposed dynamic workload balancing strategy based on CPU, memory improves the performance of high-performance computing system compared to previous strategies.
A study of the measurement systems implementation for the interior impulse noise
Song, Kee-Hyeok ; Chung, Sung-Hak ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 93~100
DOI : 10.9708/jksci.2014.19.6.093
The objective of this study is to propose the measurement system implementation method for the evaluation and measurement of the indoor-impulsive over 170 dB noise source. For the purpose of measuring impulse noise, design and implementation constructed followed subsystems of the testing center, microphone, ear simulator, head and torso simulator and so on. Measurement systems for the accuracy and reliability of impulse noise are implemented when measuring 3 ways of measurements method by the simultaneous measurement system design. For the accuracy and reliability of three mutually indoor-impulse noise measurements were compared, three kinds of measuring methods in accordance with the peak sound pressure level and octave band. Comparing the results of data, the indoor-impulse noise by analyzing a frequency characteristic was validated in difference for the statistical significance. Result are determined by the influence of the reflected wave. Therefore, the flexible size of the interior test site while interior impulse noise measurement system was constructed. Throughout this system can be affected by parameters that are the impulse noise source and the corresponding frequency-characteristic analysis to determine the spectrum of the reflected wave. And, in the near future, indoor impulse noise measurement systems for acquisition and analysis are utilized in useful data.
An efficient algorithm for scheduling parallel machines with multiple servers
Chong, Kyun-Rak ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 101~108
DOI : 10.9708/jksci.2014.19.6.101
The parallel machine scheduling is to schedule each job to exactly one parallel machine so that the total completion time is minimized. It is used in various manufacturing system areas such as steel industries, semiconductor manufacturing and plastic industries. Each job has a setup phase and a processing phase. A removal phase is needed in some application areas. A processing phase is performed by a parallel machine alone while a setup phase and a removal phase are performed by both a server and a parallel machine simultaneously. Most of previous researches used a single server and considered only a setup phase and a processing phase. If a single server is used for scheduling, the bottleneck in the server increases the total completion time. Even though the number of parallel machines is increased, the total completion time is not reduced significantly. In this paper, we have proposed an efficient algorithm for the parallel machine scheduling using multiple servers and considering setup, processing and removal phases. We also have investigated experimentally how the number of servers and the number of parallel machines affect the total completion time.
Supervisor System Development for Improving Quality of RFID Cold Storage Management Systems
Moon, Mi-Kyeong ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 109~117
DOI : 10.9708/jksci.2014.19.6.109
A cold storage is a warehouse of a insulated building with cooling installations. It has many different types of cold rooms with temperatures below 0 degrees Celsius, and the sequential workflow such as receiving, picking and packing runs in that rooms. Recently, the cold storages have adopted RFID technology, and consequently, warehouse product management in them are becoming intelligent and network. However, information inconsistency in warehouses caused by physical and logical errors reduces reliability in the RFID cold storage management system and worsens their work efficiency. Therefore, it is necessary to develop an early detection system to identify errors. In this paper, we suggest a supervisory system detecting logical errors on business processes of the RFID cold storage. It is composed of a master supervisor and mobile supervisor. In the master supervisor, the manager can set the constraints conditions and get alerts, and in the mobile supervisor, the workers confirm and deal with these faults directly. The supervisory system improve reliability of the RFID cold storage management system by recognizing a failure to identify physically and logically using these constraint conditions. This paper shows that the supervisory system can reduce the average recovery time to improve reliability by decreasing the time for detecting and analyzing errors in the RFID cold storage management system.
Social work field training awareness on the impact of the research career
Jeon, Seong-Nam ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 119~128
DOI : 10.9708/jksci.2014.19.6.119
In this study, the social welfare field training course there is a growing awareness as professionals in order to verify the impact was conducted. G-local four-year university study social work majors by sampling 198 people were examined for the purpose, through self - survey was conducted. Materials and analytical methods in order to identify the characteristics of a variable frequency, and technical analysis, T-test, F-test, ANOVA, correlation (correlation), Regression (regression) was used for the SPSS 14.0. The results are as follows. First, the personal factors of the individual physician trainees reflect (
), and then the same about Social Welfare satisfaction (
) of the Social Welfare majors had significant impact on career identity. Second, the personal factors they chose what to major in social work satisfaction (
), and if you feel you select a parent with a major in Social Work and Social Welfare major students feel the satisfaction of having a significant effect on the level of career decision crazy. Third, individual reflect personal physician factors (
) is significantly influenced the behavior of career preparation.
Study on the Electronic Contract
Kim, Jae-Nam ; Park, Jong-Ryeol ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 129~138
DOI : 10.9708/jksci.2014.19.6.129
The Electronic contract means creation sign management and storage of contract by online without limitations of the time and space through the electronic signature and encode which based on the Certificate instead of the past that treatment the contract such as creation sign management and storage of contract by face-to-face. Recently, the remarkable development of information and communication technology with supplying the high-speed Internet services. Accordingly, the transaction contract made by these also, the steady legal effect occurred by two or more parties by legal action which is the electronic agreement of expression. and it makes agreement improving corporate productivity and it can control the whole process such as contract documents and the actual buying store provision. Like this it has many benefits so, it suddenly rising as the new axis of economic activity area, it is a reality. In this change of era, with the establishment of electronic contracts, there are many problems are occurred to the expression of parties which is core of the contract on civil code so, the systematic legal composition is required. Thus, in this study will propose the reasonable improvements about the issue of electronic contract through the consideration.
A Study on The Effect of Science Learning Motivation Using Robot in Elementary School
Park, Jung-Ho ;
Journal of the Korea Society of Computer and Information, volume 19, issue 6, 2014, Pages 139~149
DOI : 10.9708/jksci.2014.19.6.139
Much research has been conducted in educational robot, a new instructional technology, for K- 12 education. Several studies have shown that educational robot provides effective learning opportunities for students in both content areas of STEM(science, technology, engineering, and mathematics) and critical academic skills, such as collaboration, problem solving and communication skills. However, most studies to date on applications of educational robots have been conducted outside the formal education setting. This study analyzed the influence of using robots in an elementary school science class in Korea with regard to science learning motivation. A total of 121 students in fourth and fifth grades participated in the study. The experimental group was taught using robots in the science class, while the control group was taught using traditional methods. Analysis of covariance (ANCOVA) was conducted to compare the between-group differences in learning motivation before and after the experiment; an interview was also conducted for the experimental group. The study results showed a significant improvement (p<.05) in both learning motivation in the experimental compared with the control group. There was also positive response to learning with a robot. This study will play an important role in research on the use of educational robot in formal education in the future.