• Journal of the Korean Society of Marine Environment & Safety
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• v.13 no.4
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• pp.51-54
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• 2007

Surfactants can be used as a cosmetics and chemical dispersants. The variation of critical micelle concentration(CMC) with temperature for hexadecyl pyridinium bromide over the range $40^{\circ}C$ to $60^{\circ}C$ has been measured by drop methods. Thermodynamic quantities for micellization of hexadecyl pyridinium bromide in water have been calculated by polynominal equation.

• Proceedings of the Materials Research Society of Korea Conference
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• 1999.11a
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• pp.20-20
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• 1999

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2001.11a
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• pp.60-60
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• 2001

• Korean Journal of Plant Resources
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• v.15 no.1
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• pp.43-49
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• 2002

Effects of BA treatment and cut planting methods on shooting and seedling characteristics were investigated to increase seedling products by cuttings of lacquer tree. Dipping on 1,000mg/L BA solution was better than dripping with same solution at 5 weeks after cut planting. As shooting rate was increased suddenly, it was 85％ at 10 weeks after cut planting. Among 3 dripping treatments, interval was not effective on shooting rate. Dripping per 2 days with 100 ㎕ of 1,000 mg/L BA solution was most effective on seedling height and leaf number and than dipping was more effective than dripping per 5 and 7 days. Branch developed on near part from dripped scion. Shooting of horizontal planting was earlier about a week and rate was increased suddenly from 3 to 6 weeks, it was highest with 96％ than others at 10 weeks after planting. Seedling of horizontal cut planting was tallest about 40cm and branch developed lower than vertical and oblique cut planting. In case of horizontal cut planting, 2-3 shoots were formed on different part of scion and than those were could divided to seedling, so horizontal cut planting was most effective to propagation of seedling than any others.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.07a
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• pp.173-174
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• 2015

컨테이너 터미널에서 이적작업은 적하작업과 반출작업을 신속하게 처리하기 위해 장치장에 흩어져 있는 컨테이너들을 재배치하는 것이다. 본 연구는 수직 배치형 장치장 블록 내에서 컨테이너 재배치 작업계획 문제를 다룬다. 재배치 작업계획은 대상 컨테이너, 옮겨질 위치 그리고 재배치 작업 순서를 정하는 것이다. 본 연구는 재배치 작업시간, 반출작업, 적하작업의 가중시간 비용을 최소화하면서 재배치 작업동안 공간 가용성이 만족되도록 장치위치와 작업순서를 함께 결정하는 혼합정수계획모형을 개발하였다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2000.04a
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• pp.9-12
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• 2000

컨테이너 터미널에서 효율적인 적하작업 계획을 자동으로 생성하는 알고리즘을 연구하였다. 실제 터미널에서 계획자들이 적하작업 계획시에 고려하는 제약소건 및 효율적인 계획을 위한 고려사항을 조사하였다. 이를 바탕으로 1단계에서는 개미시스템(ant system)이라는 인공지능기법을 적용하여 제약조건을 만족시키면서 원활한 적하작업이 진행될 수 있도록 컨테이너 크레인과 트랜스퍼 크레인의 이동순서와 위치를 결정하고, 2단계에서는 1단계에서의 결과를 바탕으로 빔탐색법(beam search)을 사용하여 컨테이너 개개의 작업순서를 결정하는 알고리즘을 개발하였다. 또한 개발된 시스템의 성능을 검증하기 위하여 최근의 대형선반에 대한 실제 현장자료를 바탕으로 실험을 수행하였다.

• Journal of Korean Society of Forest Science
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• v.14 no.1
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• pp.21-31
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• 1972

It has intended to identify the members of the Genus Lespedeza in Korea by a chemical colour reaction, and the following five species of the Genus Lespedeza grown in the garden have been used in this experiment. 1. Lespedeza bicolor Turcz 2. Lespedeza bicolor var. melanantha (Nak.) T. Lee 3. Lespedeza cyrtobotrya Miq. 4. Lespedeza japonica var. intermedia Nakai 5. Lespedeza maritima Nakai 6. Lespedeza maximowiczii Schneider 7. Lespedeza maximowiczii var. tomentella Nakai A few drops of each solution of $K_2Cr_2O_7$. $FeSO_4{\cdot}7H_2O$, $FeCl_3$, $KH_2PO_4$, $KMnO_4$, $NH_4OH$, and HCl was added to the methanol extracts of wood dust to get the specific colour reaction. HCl-infused wood was also used for the identification of L. bicolor var. melanantha and L. bicolor. The results can be summarized as the following key; 1. Chrome lemon by $K_2Cr_2O_7$ ${\cdots}{\cdots}$2 1. Sun flower yellow by $K_2Cr_2O_7$ ${\cdots}{\cdots}$Lespedeza maximowiczii var. tomentella Nakai 2. $KH_2PO_4$ Oystem white by $KH_2PO_4$; golden yellow by $FeCl_3$ ${\cdots}{\cdots}$=3 2. Cream colour by $KH_2PO_4$=6 3. Oyster white by $NH_4OH$; corn colour by $FeSO_4{\cdot}7H_2O$ ${\cdots}{\cdots}$4 3. Cream colcur by $NH_4OH$ ${\cdots}{\cdots}$5 4. Van dyke brown by $KMnO_4$ ${\cdots}{\cdots}$; sea shell pink by HCl injection under heating ${\cdots}{\cdots}$Lespedeza japonica var. intermedia Nakai 4. Sepia colour by $KMnO_4$; honey colour by HCl injection under heating ${\cdots}{\cdots}$Lespedeza maritima Nakai 5. Golden red by $FeSO_4{\cdot}7H_2O$; andover green by HCl-infused wood dust ${\cdots}{\cdots}$Lespedeza bicolor var. melanantha (Nak.) T. Lee 5. Yellow ochre by $FeSO_4{\cdot}7H_2O$; sand warm gray by HCl-infused wood dust ${\cdots}{\cdots}$Lespedeza bicolor Turcz 6. Amber green by $FeCl_3$ ${\cdots}{\cdots}$Lespedeza cyrtobotrya Miq. 6. Leather brown by $FeCl_3$ ${\cdots}{\cdots}$Lespedeza maximowiczii Schneider.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.3 no.4
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• pp.57-61
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• 1989

이 논문은 phenolic resin의 CTI에 대하여 기압을 파라메터로 고찰하였다.(IEC publication 112[습식법]). 1) 기압이 낮아짐에 따라 건조대의 형성 및 미소 불꽃방전을 발생하는 개시 적하수는 300[V] 이상에서 증가되고 있다. 2) 900[mb]에서 Tracking 파괴 적하수가 가장 높으며 기압이 낮아 질수록 CTI의 값은 증가하고 있다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.05a
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• pp.1186-1193
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• 2006

이적작업은 하역작업 시간을 단축하고 장치장의 효율을 높이기 위해 최근 중요하게 다루어지는 운영 전략들 중의 하나이다. 자동화 컨테이너 터미널에서 수출 컨테이너 이적작업은 작업영역에 제약을 가진 하역장비를 이용하여 장치장 블록에 산재되어 있는 수출 컨테이너들을 적하작업이 용이한 형태로 재배치하는 것이다. 이 연구는 이적 및 적하작업과 연관된 총비용을 최소화하기 위해 어느 베이의 어떤 컨테이너를 어느 베이로 재배치할 지를 결정하기 위한 이적계획을 정의하고 이를 혼합정수계획법으로 모형화하였다. 또한, 실제 현장에서 사용이 가능한 휴리스틱 알고리즘을 제안하였으며 다양한 시나리오를 구성하여 배치형태 및 비용 가중치 등에 대한 민감도를 분석하였다.

• Korean Journal of Materials Research
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• v.13 no.9
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• pp.555-560
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• 2003

Ag-coated Cu particles were prepared by dropping method of coating agent and were evaluated by scanning electron microscope and color difference meter. The shape of Cu particles having obvious crystal plan and edge was changed spherically according to the increase of Ag coating amount. When the Ag coating amount was 50 wt% to Cu particles, the whiteness of Ag-coated Cu particles was almost similar to that of pure Ag particles. Adding $NH_4$OH in reductant solution could increase effectively the whiteness of the Ag-coated particles. The Ag-coated particles having the highest whiteness was obtained when the content of hydrazine in reductant solution was 0.48 M.