• 제어로봇시스템학회:학술대회논문집
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• 2003.10a
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• pp.1862-1866
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• 2003

A control system design with Coefficient Diagram Method (CDM) is proven that effective for SISO control design. But the control system design for MIMO via CDM is not concrete procedure. In this paper presents the control system design method for quadruple-tank process via CDM. By using the decentralized method for both non-minimum phase and minimum phase are made. The results from Integral-Proportional (I-P) controller’s design via CDM and standard Proportional-Integral (PI) controls are also shown to compare the merits of the proposed controllers.

• IE interfaces
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• v.21 no.4
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• pp.354-364
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• 2008

This paper deals with a design problem of simulation for MIME (multi indenture and multi echelon) with lateral transshipment. Especially, we consider lateral transshipments in case that (S-1, S) ordering policy is used in multi echelon repair system. Some rules for ordering spare parts in lateral transshipments between the lowest-level units are studied and are implemented by an activity diagram in object-oriented method. By numerical examples, we compare regular (S-1, S) ordering policy and (S-1, S) policy with lateral transshipment.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38A no.1
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• pp.88-95
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• 2013

We propose a novel driver circuit design using $0.18{\mu}m$ CMOS process technology that drives a 1550 nm high-speed VCSEL used in optical transceiver. We report a distinct improvement in bandwidth, voltage gain and eye diagram at 3.1Gb/s data rate in comparison with existing topology. In this paper, the design and layout of a 3.1Gb/s VCSEL driver for optical transceiver having arrayed multi-channel of integrating module is confirmed.

• Annual Conference of KIPS
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• 2011.11a
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• pp.1532-1533
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• 2011

본 연구에서는 SQL를 배우고자 하는 개발자들에게 SQL 문법을 학습할 수 있는 교육용 Tool을 개발한다. 개발자가 예제와 설명을 통하여 SQL 문법을 배우고 ER-Diagram을 보면서 논리적인 DB의 개념을 이용하여 쉽게 학습할 수 있다. 예제는 초급과 중급으로 나누어져 있어 사용자의 수준에 맞는 학습이 선택가능하다. TPC-H 데이터는 DSS 환경에서 사용되는 표준 데이터 모델로 Database Generater를 통해 생성하며 본 연구에서 사용자가 데이터량의 조정이 가능하도록 구성하였다.

• Journal of the Korean Chemical Society
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• v.10 no.4
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• pp.166-174
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• 1966

The multistep mechanism of photosensitized curing reaction cinnamoylated photosensitive polymer is proposed from the energy level diagram of cinnamic acid and sensitizer, and from the fact that excess of sensitizer brings the sensitivity to a limiting value etc. Various factors which have effects on the ability of sensitizer are also discussed. The mechanism involves following steps: activation to the first excited singlet states of cinnamoyl group(C) and sensitizer(S) by their absorption of photon, their intersystem crossing to the lowest triplet state, bimolecular internal quenching by formation of excimer of sensitizer, triplet excitation energy transfer and intermolecular addition between cinnamoyl group in ground state and that in triplet state. The rate equation derived from this mechanism is $-\frac{d[C]}{dt} = \frac{K_1[C]}{K_2 + [C]}[\frac{I^c_{abs}}{K_3 + [S]} + \frac{K_4[C]}{(K_5 + [C])(K_6 + [S])}(I^s_{abs} + \frac{K_7I^c_{abs}[S]}{K_8 + [S]})]$ where $I^c_{abs}\;and\;I^s_{abs}$: the rates of absorption of photon by cinnamoyl group and sensitizer $K_n$: Constants. It is proved with the cinnamate of poly(glyceryl phthalate)(PGC) in the absence of sensitizer using the infrared analytical method and successfully applied for the experimental data reported on the effects of the degree of cinnamoyl esterification and the concentration of sensitizer upon the sensitivity.

• East Asian mathematical journal
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• v.36 no.5
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• pp.537-545
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• 2020

We investigate some polynomial invariants for virtual knots via virtualization moves. We define two types of polynomials W_G(t) and S²_G(t) from the definition of the index polynomial for virtual knots. And we show that they are invariants for virtual knots on the quotient ring Z[t^±1]/I where I is an ideal generated by t² - 1.

• Journal of the Korean Mathematical Society
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• v.54 no.3
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• pp.749-762
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• 2017

The surface singular braid monoid corresponds to marked graph diagrams of knotted surfaces in braid form. In a quest to resolve linearity problem for this monoid, we will show that if it is defined on at least two or at least three strands, then its two or respectively three dimensional representations are not faithful. We will also derive new presentations for the surface singular braid monoid, one with reduced the number of defining relations, and the other with reduced the number of its singular generators. We include surface singular braid formulations of all knotted surfaces in Yoshikawa's table.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2000.11a
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• pp.460-465
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• 2000

원자력 발전소의 중대사고는 비록 발생 확률은 매우 낮지만 사고 발생시 결말 효과가 크기 때문에 TMI 사고나 체르노빌 사고 이후 이에 대한 연구는 활발하게 진행되고 있다. 방사성 물질이 일단 환경으로 방출된 이후에 인체 및 환경에 영향을 미치는 주요 변수로는 풍향, 풍속, 강수량, 대기안정도로 대표되는 기상 조건과 방사선원 및 방출 고도, 열 함량, 방출 시간 등과 같은 방사선원 방출 특성에 관한 여러 가지 많은 변수들을 고려하여야 한다.(중략)

• Journal of Multimedia Information System
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• v.7 no.2
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• pp.165-174
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• 2020

This document outlines a new color image encryption technology development. After splitting the original image into 240-bit blocks and modifying the first block by an initialization vector, an improved Feistel circuit is applied, sponsored by a genetic crossover operator and then strong chaining between the encrypted block and the next clear block is attached to set up the confusion-diffusion and heighten the avalanche effect, which protects the system from any known attack. Simulations carried out on a large database of color images of different sizes and formats prove the robustness of such a system.

• Electronics and Telecommunications Trends
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• v.20 no.3 s.93
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• pp.112-121
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• 2005

고속직렬프로토콜의 출현으로 기존의 병렬 인터페이스에서 중요하게 사용되던 파라미터들의 의미가 변화되고 있다. 특히 ‘1’, ‘0’의 디지털 신호가 고속의 차동신호로 전송되면서 신호 무결성의 파라미터로 지터(jitter)가 중요한 의미를 가지게 되었다. 본 고는 지터의 발생과 분석, 테스트 등 전분야를 다루고 있다. 지터를 분석하기 위한 방법으로 Eye Diagram, Bathtub 곡선, TIE 히스토그램 등을 다루며 이러한 방법을 사용하여 지터를 각각의 특성별로 분리한다. 그리고 지터를 테스트 장비와 각각의 특징을 살펴본 후 PCI Express 트랜시버 지터 테스트의 실례를 통하여 지터 테스트 방법과 분석을 보여준다.