• Journal of Welding and Joining
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• 제18권2호
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• pp.36-42
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• 2000

• 정보과학회지
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• 제25권5호
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• pp.10-16
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• 2007

• 대한지구과학교육학회지
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• 제6권2호
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• pp.112-123
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• 2013

Under this research, the survey is made on the definitive influence of the first-year education process of the science focus school for each of humanities, science and science core courses and the level of satisfaction of the non-curriculum experiment activity program for each course to find out the effectiveness of the first-year education process of the science focus school. For this purpose, this research has set three research issues. First, By clarifying the research result through the first-year education curriculum for science core school, noticeable change was observed for science focus school students through the change of attitude related to science for each desired course of students. Second, in the self-directed learning characteristics change, there was meaningful change for each desired field of students. Students hoping for humanities curriculum had great help in improvement of creative thinking for openness, creativeness and the like, but the influence was slightly insufficient in the moderation and control capability on themselves in learning attitude. Third, By analyzing the research result comprehensively, the first-year education curriculum for science core school provides high level of tailored science learning for the science focus school students and the level of satisfaction for students was significantly high.

• 한국통신학회논문지
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• 제22권10호
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• pp.2236-2245
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• 1997

직접위성방송(DBS)은 정보화사회를 위한 실질적인 서비스 분야로써 각광을 받고 있으며, 특히 해상에 까지 광범위한 방송서비스를 제공할 수 있는 매우 유용한 매체이다. 그러나 해상에서의 DBS 수신장치는 선박의 운항이나 피칭(pitching), 로링(rolling), 요잉(yawing) 등의 동요에 관계없이 위성을 계속 추적하기 위한 복잡한 안테나 제어장치가 필요하다. 이 연구는 소형 선박에서 무궁화위성의 DBS를 수신하기 위한 장치의 개발을 목표로 하고 있으며, 한반도 주위의 해역을 항해하는 소형 선박에서 쉽게 탑재하고 사용할 수 있도록 소형, 경량, 저가격화에 중점을 두었다. 그러므로 한반도 연.근해에서 무궁화위성의 추적조건을 분석하고 이에 적합한 Az/El 2축 마운트를 설계하여 제작하였으며, 스텝트렉(step track) 빙식에 의한 추적과 각속도 센서를 이용한 마운트의 동요보정 기능을 타 장비의 도움없이 스스로 수행할 수 있는 시스템을 연구하였다. 또한 장치를 탑재할 수 있는 선박운동 시뮬레이터를 제작하여 여러가지 형태의 동요를 구현하며, 추적과 동요보정에 따른 수선상태를 측정, 분석하므로써 실험적으로 최적의 알고리즘을 작성하였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1999년도 봄 학술발표회 논문집
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• pp.497-504
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• 1999

This study presents the physical and engineering characteristics of soil-bentonite admixed liner in I landfill. Main focus was the hydraulic conductivity of compacted soil-bentonite admixed and mechanisms governing low permeable properties of the admixed liner. Laboratory and field tests such as compaction, hydraulic conductivity, density, water content for the soil-bentonite admixed liner were carried out. Quality control criteria for the best construction of the soil-bentonite admixed liner was suggested through laboratory and field test results.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 학술대회 논문집 정보 및 제어부문
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• pp.445-447
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• 2008

The CCTV systems is the most extensively used for a burglar proof, a crime prevention and a Prevention forest fires etc. The CCTV systems which is used in present is a PAN/TILT form. We want to control of CCTV systems motion by Up/Down, Left/Right, Zoom In/Out, Focus, TELE. We design a 8051 microcontroller board and a Key Controller and a Relay Controller. We conformed its feasibility through the simulation.

• 제어로봇시스템학회논문지
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• 제15권7호
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• pp.671-674
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• 2009

Determining the Schur stability of a polynomial is one of fundamental steps in many engineering problems including digital control system design or digital filter design. Due to its importance a variety of techniques have been reported in the literature for checking the Schur stability of a given polynomial. However most of them focus on real polynomials, and few results are available for complex polynomials. This paper concerns the Schur stability of complex polynomials. A simplified Jury's table for real polynomials is extended to complex polynomials.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 1998년도 가을 학술발표논문집 Vol.25 No.2 (2)
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• pp.75-77
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• 1998

Perhaps one of the most versatile approaches to learning in practical domains lies in case based reasoning. To date, however, most case based reasoning systems have tended to focus on relatively simple domains. The current study involves the development of a decision support system for a complex production process with a limited database. This paper presents a set of critical issues underlying CBR, then explores their consequences for a complex domain. Finally, the performance of the system is examined for resolving various types of quality control problems.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2011년도 추계학술대회 논문집
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• pp.811-816
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• 2011

This study includes investigation on sound transmission phenomena through a structural panel including structural vibration and feedback control methodology to minimize the transmission. Focus is placed on finding the relation between vibration pattern and sound transmission, and on finding optimal sensor and actuator location. A simple analog feedback control circuit is designed and implemented to verify the approach.

• Advances in aircraft and spacecraft science
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• 제9권6호
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• pp.553-569
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• 2022

In this article, we propose a criterion for ensuring the asymptotic stability of large multiple delays, based on the direct Lyapunov method. Based on this criterion and distributed control scheme, the controllers are synthesized by the PDC to stabilize these large-scale systems with multiple delays. And we focus on the results which shows the high effective by the proposed theory utilized for damage propagation for aircraft structural analysis of composite materials. Finally, the numerical simulations confirmed the effectiveness of the method.