• Journal of the Computational Structural Engineering Institute of Korea
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• v.21 no.6
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• pp.563-569
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• 2008

In this paper, the missile database system for the multidisciplinary design and optimization framework has been designed and investigated. The requirements of the missiles database are analyzed and the database design concept has been defined first. The data flow among the analysis disciplines is investigated and the Entity-Relation diagram is constructed to develop the database table and to define the database schema. The developed database system is integrated into the missile design framework to perform the store, search and management of the design data during the design and analysis of the missile development, hence the efficiency and validity of the database designed in this study has been demonstrated.

• Journal of the Korea Society for Simulation
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• v.16 no.3
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• pp.65-74
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• 2007

A tactic manager which can change the behavior of a simulation model according to the tactic definition file has been studied and implemented. Based on the DEVS(discrete event system specification) formalism, we generated a simulation model which is equipped with the inter ace to the tactic manager. To demonstrate the effectiveness of the tactic manager, a target motion analysis simulation of the warfare between a submarine and a surface ship is simulated.

• Journal of the Korean Institute of Intelligent Systems
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• v.12 no.5
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• pp.405-410
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• 2002

In this paper, fuzzy system modeling using new hierarchical structure is suggested for the complex and uncertain system. The proposed modeling technique Is to decompose the fuzzy rule base structure into the above-rule base and the sub-rule base. By applying hierarchical fuzzy rules, they can be used efficiently and logically. Also, hieratical fuzzy rules can improve the accuracy and the transparency of structure in the fuzzy system. The genetic algorithm is applied for optimization of the parameters and the structure of the fuzzy rules. To show the effectiveness of the proposed method, fuzzy modeling of the complex nonlinear system is provided.

• The KIPS Transactions:PartD
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• v.9D no.1
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• pp.65-74
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• 2002

This paper focuses components interactions which is important factor in designing software components. We classified several types of interaction between components and suggested appropriate graphical notation to extend UML and design process with extended method. Suggested notation and process was verified by practical experiment which is performed in travel agent component application. Representing interaction between components is not same to representing association between classes. UML in current version needs to be extended for representing this kind of components interaction. This research covers UML extension for components interaction and experiment for showing effectiveness.

• Journal of Digital Contents Society
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• v.12 no.3
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• pp.329-337
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• 2011

Digital talking book has been developed to enhance reading experiences for reading-disabled people. In the existing digital talking book, however, annotations can be created only through the screen interfaces. Screen annotation interfaces is of no use for reading-disabled people because they need reader's eyesight. In this paper, we suggest a voice annotation technique can create notes and highlights at any playing time by using hearing sense and voice command. We design a location determination technique that pinpoints where a voice annotation should be placed in the playing sentences. To verify the effectiveness of our voice annotation technique, we implement a prototype in an android platform. We can find out by the black-blindfolded users testing that our system can perfectly locate the exact position that a voice annotation should be placed into.

• Journal of Korea Society of Industrial Information Systems
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• v.12 no.5
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• pp.71-85
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• 2007

In recent years, the need of the education for the Internet ethics is emphasized as the number of offenses committed by juveniles is increasing. So many researches on the methodologies about educating the Internet ethics have been being performed But, those are not competent to make young people inspire the sense of ethics in the cyber-space because they get trained by the cramming system of education with a textbook in their schools. In this paper, we developed a web-based learning model and an learning system including various multimedia materials that induce the learners for ethics to study actively. And then we applied our system to school education for the Internet ethics, and verified the effectiveness of our learning model and system.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.11
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• pp.1665-1674
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• 2013

In this paper, we propose a genetic algorithm(GA) based locomotion method of a quadruped robot with waist joint, which makes a quadruped robot walk on the slop efficiently. In the proposed method, we first derive the kinematic model of a quadruped robot with waist joint and then set the gene and the fitness function for GA. In addition, we determine the best attitude for a quadruped robot and the landing point of a foot in the walk space, which has the optimal energy stability margin(ESM). Finally, we verify the effectiveness of the proposed method by comparing with the performance of the previous method through the computer simulations.

• KIISE Transactions on Computing Practices
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• v.22 no.5
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• pp.218-224
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• 2016

This paper proposes a computer-based practical automatic scoring system for Korean short answers through student answer analysis and natural language processing techniques. The proposed system reduces the overall scoring time and budget, while improving the ease-of-use to write answer templates from student answers as well as the accuracy and reliability of automatic scoring system. To evaluate the application of the automatic scoring system and compare to the human scoring process, we performed an experiment using the student answers of social science subject in 2014 National Assessment of Educational Achievement.

• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.300-300
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• 2018

최근 우리나라는 봄철 지속적으로 가뭄이 발생하는 추세로 모니터링과 더불어 가뭄 피해를 경감할 수 있도록 가뭄해석 기법이 필요하다. 이를 위해 우선적으로 우리나라 실정에 적합한 가뭄지수를 산정하고, 개선을 통해 가뭄정보들이 수자원확보를 위한 관리와 정책에 활용되어야 한다. 이에 따라 본 연구에서는 국내 기존에 활용되고 있는 수문학적 가뭄지수인 개선된 지표수공급지수(MSWSI : Modified Surface Water Supply Index)를 선정하고 개선하였으며, 개선된 MSWSI를 이용하여 앙상블기법 기반의 확률론적 가뭄해석을 수행하였다. MSWSI의 개선에 있어서는 우선, 유역 내 공식적으로 수집되는 모든 수문기상인자를 조사하여 기존 MSWSI에서 적용한 강수량, 하천유량, 댐 유입량, 지하수량 4가지 인자와 사용 가능한 댐 저수위, 댐 방류량 인자를 추가하여 반영하였다. 또한 각 수문인자들에 대하여 인자별로 적합한 확률분포를 적용하였다. 또한 극심한 가뭄이 발생한 2006년과 2014년을 대상으로 비교 검토를 실시하고, 앙상블기반 확률론적 가뭄전망을 수행하고 검증하였다. 연구결과, 본 연구에서 개선한 MSWSI가 2006년과 2014년 발생한 가뭄현상을 더 잘 나타내는 것으로 분석되었다. 또한 실제 수문기상현상을 더욱 잘 반영하여 실제 가뭄과 유사한 가뭄결과로 분석되어, 개선된 MSWSI가 효용성이 있음을 확인하였다. 또한 앙상블 기반의 확률론적 가뭄전망 결과, 본 연구에서 개선한 MSWSI를 이용하였을 때 더 우수한 것으로 분석되었다. 대부분의 유역에서 실제 가뭄지수가 개선된 MSWSI를 이용한 가뭄전망 범위에 속하는 것으로 나타나, 본 연구에서 개선한 MSWSI를 활용한다면 보다 정확한 가뭄모니터링 수행이 가능하며, 가뭄전망의 정확성을 높일 것으로 판단된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.97-99
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• 2014

This study aims to suggest development model for ICT Teaching and Learning System adopting collective intelligence. First, we defined program modules according to functions which multimedia online encyclopedia-type e-textbook should have. Then, we also specified content information creating rules and procedures and content information searching methods. Finally, we developed the prototype which suggests user interface to collect and search information adopting information visualizing techniques. This study has significance in suggesting advanced form of ICT system in which qualified teachers can create, accumulate, and share information and students can explore information and expand search in self-directed manner.