• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.1
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• pp.221-229
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• 2015

This paper looks into the measurement of modeling ability in different fields like science, mathematics, operations research and management science and emulates the ideas to system analysis and design where modeling is a very useful skill. An assessment tool was designed to measure the graphical modeling ability in systems analysis and design. It was administered to 92 students and submitted to 10 MIS experts and tested statistically for its reliability and validity.

• Journal of Digital Convergence
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• v.11 no.3
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• pp.363-369
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• 2013

In this paper, the modeling of phenomena that occurs in the brain related language was designed and developed the second language proficiency method. This method based on cognitive ability test in cognitive psychology that is the lexical decision task, the priming task and the verbal span task. The lexical decision task involves measuring how quickly decide stimuli as words or nonwords. This task is divided reading and listening according to stimulus type to the details. The priming task finds the output of the language. This task is divided the translation-priming and the semantic-priming according to stimulus type. The verbal span task finds the short term memory. In this paper, we propose the second language proficiency measurement method using the linguistics cognitive ability of the learner about the second language.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1991.11a
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• pp.219-222
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• 1991

오늘날 점점 “지능적인” 우주구조물과 기계적 시스템의 빠를 발견으로 인하여 자체 진단과 제어 능력을 가진 발전된 구조가 중요해지고 있다. 일반적으로 이들 구조물이 자연 상태에서 유연하게 분포되어 있으므로 분포된 동적 측정과 효과적인 진동감쇄가 이들의 수행에 필수적이 되고 있다. 이 분야에 대한 이론적 발전은 지난 20년간 꾸준히 이루어져 왔다.(중략)

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.250-254
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• 2009

상수관망의 기능은 정수처리 된 양질의 물을 수용가에게 안전하게 공급하는 것이며, 이를 위해 상수관내에는 수용가에 충분한 양의 물을 공급할 수 있는 적정 유량과 압력이 유지되어야하고 최소기준치 이상의 잔류염소농도 유지 등의 적절한 수질을 만족시켜야한다. 하지만 상수관망은 상수관 파괴에 따른 오염물질 유입이나 테러와 같은 인위적인 오염물 주입 등의 갑작스런 사고에 의한 수질오염에 언제나 노출되어 있다. 이러한 수질오염사고 발생 시 신속한 대처를 위해서는 상수관망의 모든 절점에 수질측정 센서를 설치하는 것이 바람직하겠지만, 이는 경제적 측면과 센서의 유지 관리측면에서는 이상적이지 않다. 또한 발생 가능한 모든 상황에 대한 시뮬레이션 기반의 수질모델링을 통하여 적절한 수질오염 측정지점을 선정할 수도 있겠지만, 이는 상당한 시간과 계산능력을 요한다. 따라서 본 연구에서는 네트워크 분석기법 (Network Analysis)인 Betweenness Centrality와 수리해석 모형인 EPANET을 이용하여 상수관망의 수질오염측정지점 선정기법을 제안하였다. Betweenness Centrality는 네트워크를 구성하는 한 절점과 다른 한 절점을 연결시키는 특정 절점의 매개정도로 중심성을 측정하는 기법이다. Betweenness Centrality는 상수관망의 특정절점에 수질오염 사고가 발생하였을 때 오염원의 이동 가능한 경로의 수에 따라 그 값이 달라지며, 결과값에 의하여 수질오염측정지점이 선정된다. 본 연구에 의한 결과는 상수관망이 복잡하여 시뮬레이션을 통한 분석이 어렵고 많은 시간과 계산능력이 요구 될 경우 대안기법으로 활용될 수 있을 것으로 판단된다.

• Journal of Information Technology and Architecture
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• v.9 no.3
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• pp.265-273
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• 2012

To improve M&S and SBA, it is important that their capability and maturity models should be developed. In general, capability and maturity models provide the standards for growth and improvement as well as the assessment on the organizational maturity level and the process capabilities, which are composed of a standard reference model and appraisal methods. In this paper, following introduction of a standard reference model for SBA in brief, we investigate some appraisal methods by survey and provide frameworks of appraisal method for SBA.

• Proceedings of the Acoustical Society of Korea Conference
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• spring
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• pp.23-26
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• 2000

본 논문에서는 연속음성인식에 사용되는 언어모델이 학습 코퍼스에서 나타나지 않는 문맥에 대하여 신뢰할만한 확률을 생성할 수 있도록 하는 방안으로 다중 단어 카테고리 결정방법을 제안하였다. 제안된 다중 단어 카테고리 결정 방법은 기존의 카테고리 기반 언어모델에서의 미관측 문맥에 대한 모델링 능력을 유지하면서 동형이의어에 대한 확률의 과도한 일반화를 방지한다. 제안된 방법을 이용한 언어모델의 성능을 측정하기 위해 미관측 문맥이 $31\%$ 포함된 인식문장에 대한 N-Best rescoring을 수행한 결과 word accuracy는 1-Best문장에 대해서 $3.2\%$의 향상을 얻었고 기존의 카테고리기반 언어모델을 적용한 결과에 비하여 $0.8\%$의 향상을 얻을 수 있었다.

• Proceedings of the KAIS Fall Conference
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• 2011.05b
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• pp.673-675
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• 2011

고무는 소재의 탄성 회복 능력과 감쇄 능력, 수밀성의 우수성으로 인해 여러 기계산업의 부품으로 사용되어 지고, 자동차 부품으로는 마운트와 범퍼 등의 충격해소를 위하여 설계되어지고 있다. 본 논문에서는 승차감에 영향을 주는 내부 소음 및 진동의 원인인 엔진의 떨림현상을 감쇄시키기 위한 부품인, 엔진마운트의 고무 모형을 CATIA 프로그램을 사용하여 모델링하였고, ANSYS 12.0 프로그램으로 진동과 하중을 주어 변화량을 측정하여 상용차에 맞는 엔진마운트의 최적설계를 방향을 제시하였다.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.43 no.1 s.343
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• pp.57-70
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• 2006

This paper descWireless Sensor Network consisting of a number of small sensors with transceiver and data processor is an effective means for gathering data in a variety of environments. The data collected by each sensor is transmitted to a processing center that use all reported data to estimate characteristics of the environment or detect an event. This process must be designed to conserve the limited energy resources of the sensor since neighboring sensors generally have the data of similar information. Therefore, clustering scheme which sends aggregated information to the processing center may save energy. Existing multi-hop cluster energy consumption modeling scheme can not estimate exact energy consumption of an individual sensor. In this paper, we propose a new cluster energy consumption model which modified existing problem. We can estimate more accurate total energy consumption according to the number of clusterheads by using Voronoi tessellation. Thus, we can realize an energy efficient cluster formation. Our modeling has an accuracy over $90\%$ when compared with simulation and has considerably superior than existing modeling scheme about $60\%.$ We also confirmed that energy consumption of the proposed modeling scheme is more accurate when the sensor density is increased.

• Journal of the Korea Computer Industry Society
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• v.7 no.5
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• pp.563-572
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• 2006

Advantage that light transmission treatment way of most suitable through skin can investigate light directly in part ar there is difference in ability photoelectricity month by diverse complexion of horn character department which is branch or head of a family outside part of skin and treatment according to various patient can be inappropriate. By result that this research uses color information after search each color ingredient that ingredient of HIS and YIQ that use method, color information to use skin impedance way and color information through skin area ion and difference video to do fixed measuring by light investigation way by skin impedance corresponds to skin color in an experiment though is most universal result according to patient's skin model area detection each single person's skin model through videotex automatically create and because measuring, investigate skin color, energy, wave length, approximately, transmission time, model of most suitable that draw pulse delay and so on and want and special quality, and saved standard of disease treatment pulse modeling by skin impedance, and design and manufacture light investigation pulse modeling system of most suitable by skin subordinate, and constructed suitable treatment pulse database by skin color.

• The Mathematical Education
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• v.60 no.2
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• pp.133-157
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• 2021

Ill-structured problems have drawn attention in that they can enhance problem-solving skills, which are essential in future societies. The purpose of this study is to analyze and evaluate students' spatial reasoning(Intrinsic-Static, Intrinsic-Dynamic, Extrinsic-Static, and Extrinsic-Dynamic reasoning) and problem solving abilities(understanding problems and exploring strategies, executing plans and reflecting, collaborative problem-solving, mathematical modeling) that appear in ill-structured problem-solving. To solve the research questions, two ill-structured problems based on the geometry domain were created and 11 lessons were given. The results are as follows. First, spatial reasoning ability of sixth-graders was mainly distributed at the mid-upper level. Students solved the extrinsic reasoning activities more easily than the intrinsic reasoning activities. Also, more analytical and higher level of spatial reasoning are shown when students applied functions of other mathematical domains, such as computation and measurement. This shows that geometric learning with high connectivity is valuable. Second, the 'problem-solving ability' was mainly distributed at the median level. A number of errors were found in the strategy exploration and the reflection processes. Also, students exchanged there opinion well, but the decision making was not. There were differences in participation and quality of interaction depending on the face-to-face and web-based environment. Furthermore, mathematical modeling element was generally performed successfully.