• Proceedings of the IEEK Conference
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• 2002.07b
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• pp.1284-1287
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• 2002

A fast algorithm for a circular pattern recognition from a binary edge image is proposed in this paper. The implementation of this algorithm onto an FPGA is designed using Verilog-HDL where a target device is Altera EPF10K100ARC240-3. For a 256 ${\times}$ 256-pixe1 binary edge image assuming a real watermelon in a greenhouse, improved circuit performance of the proposed design was confirmed.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.23 no.10
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• pp.1274-1284
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• 1999

The Regulatory Guide 1.82 recommends an analysis of hydraulic performance for sump of ECCS (Emergency Core Cooing System) when LOCA(Loss of Coolant Accident) occurs in a nuclear power plant. The present study deals with 3-dimensional, unsteady, turbulent and two-phase flow simulation to examine the behavior of mixture of reactor coolant and debris near the floor of containment building in conjunction with appropriate assumptions. The dispersed solid model has been adjusted to the interfacial momentum transfer between reactor coolant and debris. According to the results, the counterclockwiserecirculation zone had been formed in the region between sump and connection aisle about 376 second after LOCA occurs. The debris thickness accumulated on a sump screen periodically increases or decreases up to 2000 second, afterwards its peak decreases.

• 제어로봇시스템학회:학술대회논문집
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• 1990.10b
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• pp.1284-1288
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• 1990

In this paper, we are going to study the stabilization of the semilinear heat equation with inhomogenous boundary conditions, whose solutions are not (in general) stable. Here, we use the discrete-time feedback inputs through the boundary of geometric domain to the semilinear system under some additional conditions and assumptions. It is shown that under these conditions, the stabilization can be realized by applying pole assignment argument to the principal linear part of the system and that the solutions exist globally in discrete-time t without any finite escape time.

• Annual Conference of KIPS
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• 2003.11b
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• pp.1281-1284
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• 2003

본 논문에서는 무선 이동 통신 환경에서 동영상 전송시 발생하는 패킷 손실 및 지연을 줄이고 최대한 모바일 호스트에서 손상 없이 플레이 할 수 있도록 gateway를 이용하여 media 서버에서 mobile host까지의 적절한 전송 스케줄을 구한다. 모바일 호스트의 구조상 작은 버퍼량을 가지고 있으며, 그리고 무선 통신 환경은 유선에 비하여 작은 대역폭을 가지고 있다. 미디어 스트림을 전송하는데 있어서 dropping 없이 패킷이 전송될 수 있도록 gateway상에서 버퍼링을 실시한다. 이 논문에서는 gateway와 mobile host간의 transmission rate를 조절하여 gateway상의 버퍼량을 최소화시키는 전송 스케줄 방법을 제안한다.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.29 no.11 s.242
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• pp.1277-1284
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• 2005

The combustion characteristics of methane oxygen diffusion flames have been investigated to give basic information for designing industrial oxyfuel combustors. NOx reduction has become one of the most determining factors in the combustor design since the small amount of nitrogen is included from the current low cost oxygen production process. Flame lengths decreased with increasing fuel or oxygen velocity because of the enhancement of mixing effect. Correlation equation between flame length and turbulent kinetic energy was proposed. NOx concentration was reduced with increasing fuel or oxygen velocity because of the enhanced entrainment of the product gas into flame zone as well as the reduction of residence time in combustion zone.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.05a
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• pp.1280-1284
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• 2006

This paper describes the methodology for environmental assessments of traffic noise sources. An attempt is made to establish evaluation scale relationships between noise quality Parameters and subjective degrees annoyance. Subjective experimental was conducted to determine the subjective degrees annoyance that scaling score compare with reference and varieties noise source about modified traffic noises with $40{\sim}85dB$. Also a correlation analysis between noise rating index and satisfactory percentage of the noise dose response curves varied with response was conducted. As a result of study, subjective annoyance degree has not correlation of proportional linearity to the A weight noise level, but has correlation of proportional linearity to the index composed to loudness and tonality. It is suggested to be resonable level 4.9 (equivalence about 53dB) index on the out door noise limits for traffic noise and to be 6 step scale base on the linearity for evaluation traffic noise.

• Proceedings of the Korea Water Resources Association Conference
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• 2004.05b
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• pp.1280-1284
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• 2004

본 논문에서는 월 댐유입량을 예측하는데 있어서 뉴로-퍼지 시스템의 적용성을 검토하였다. 뉴로-퍼지 알고리즘으로 퍼지이론과 신경망이론의 결합형태인 ANFIS(Adaptive Neuro-Fuzzy Inference System)를 이용하여 모형을 구성하였다. ANFIS의 공간분야에 의한 제어규칙의 선정에 있어 퍼지변수가 증가함에 따라 제어규칙이 기하급수적으로 증가하는 단점을 해결하기 위해 퍼지 클러스터링(Fuzzy flustering)방법 중 하나인 차감 클러스터링(Subtractive Clustering)을 사용하였다. 또한 본 연구에서는 기후인자들을 인력으로 하여 모형을 구성하였으며 각각 학습기간과 검정기간으로 나누어 학습기간에는 모형의 매개변수 최적화를, 검정기간에는 최적화된 모형의 매개변수를 검정하는 순으로 연구를 수행하였다. 예측 길과, ANFIS는 댐유입량 예측시 입력자료의 종류가 많아질수록 예측능력 더욱 정확한 것으로 판단된다.

• Journal of the Korean Society of Clothing and Textiles
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• v.36 no.12
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• pp.1270-1284
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• 2012

This article examines how individual differences on the need for cognitive closure and demographics influence consumer perception and the usage of consumer reviews in online shopping. Data were randomly collected from 2,381 U.S. online consumer review users through an online survey. The findings from multiple regression analyses revealed the different effects of the need for cognitive closure dimensions (i.e., preference for order and structure, preference for predictability, discomfort with ambiguity, closed-mindedness, and decisiveness) and demographic characteristics on consumer attitudes, perceived online review influence, benefits, persuasiveness, and review usage behavior. Finally, practical implications and prospects for future research are discussed.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2018.05a
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• pp.37-38
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• 2018

BIM(Building Information Modeling) in the architecture, VDC(Virtual Design and Construction) defined CIFE(Center for Integrated Facility Engineering) of Stanford university in USA, and Data-driven design definition issued by TECDOC-1284 of IAEA are doing data-level design generated by 3D CAD technology, integrating and managing related information based on the 3D model, and Using 3D models effectively during nuclear power plant life cycle. 3D model of domestic nuclear power industry is using interference review between design fields, 4D system linked 3D construction model and schedule activity, but the 3D model generated in the design phase is effectively not utilized during the construction, operation, decommissioning. therefore, This study is aimed to suggest 3D model LOD(Level of Detail) advancement method through the analysis of existing literature, 2D drawings, and 3D models throughout nuclear power plant lifecycle.

• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.1283-1284
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• 2006

기존의 89S51의 Flash Memory에 데이터를 저장하기 위해서 패러럴 포트를 사용하였다. 하지만 패러럴 포트를 이용한 방법은 많은 단점을 갖고 있는데, 그 중에 하나의 포트에 하나의 디바이스밖에 접속 할 수 없기 때문에 여러 디바이스를 접속하기 위해서는 포트 수를 증가시켜야 한다는 문제점이 있다. PC는 패러럴 포트를 $1{\sim}2$개 정도만 갖고 있어서 확장을 하기가 여의치 않다. 이에 따라 패러럴 포트의 단점을 보완하고자 한다. 이러한 문제를 해결하고 보완 할 수 있는 USB 통신을 이용해 Micro-Controller인 89S51에 내장된 Flash Memory에 데이터를 저장 하려고 한다.