• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제26권2호
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• pp.172-178
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• 2000

When we establish treatment planning of facial asymmetry, we must predict each asymmetrical element that will be changed upon coronal, axial, sagittal plane. At the visual point, prediction of the change of coronal plane is most important. It is important difference between Rt. and Lt. mandibular angle belonging to posterior coronal plane, as well as anterior coronal plane, such as upper and lower incisor, or midline of chin point. Several methods for control bulk of mandibular angle are additional angle shaving after osteotomy, grinding contact area between proximal and distal segment for decrease the volume, or bone graft for increase the volume. But, at the point of bimaxillary surgery, transverse position of posterior maxilla is an important factor for control it. So, we would report transverse movement of posterior maxilla for decrease asymmetry on the posterior coronal plane of face, that is, asymmetry of mandibular angular portion.

• 한국물환경학회지
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• 제27권2호
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• pp.159-166
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• 2011

The use of land cover was sharply changed during 1975~2007 in the Kyungan watershed $(561.12 km^2)$. The changes occurred over an area of more than $227.65 km^2$ during the overall period at changing rates of 1.04% per year for water area, 1.79% per year for residential area, 2.99% per year for bare area, 3.03% per year for wetland area, 3.04% per year for grass area, 0.87% per year for forest and 2.32% per year for agriculture area. Water, residential, bare and wetland areas increased, while grass, forest and agriculture areas decreased during the last 32 years. BOD concentrations of representative sites for each sub-watershed continuously increased until the early 2000s as residential area increased with the highest discharged load, but decreased after the mid 2000s except upper Kyungan watershed. Such decline appears to be associated with the planning of Total Maximum Daily Load management for Gwangju city and expansion of waste water treatment plant. It is necessary to control land use/cover changes of the upper watershed and to prepare appropriate watershed management system for improvement in river environment including water quality, stream flow and bio-diversity.

• 환경생물
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• 제26권4호
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• pp.303-310
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• 2008

Heavy metal concentration of Fe, Zn, Cu, Cd and Pb were analysed from seaweeds (Ulva pertusa, Sargassum thunbergii, Caulacanthus okamurae), sediments and seawater at the two experimental sites of Daebul and Sabjin industrial complex in Mokpo coastal area with a control site (Heugsando). Highest values of heavy metals were found at two experimental sites influencing by various pollution sources such as industrial drains, sewage and harbours. In contrast, the lowest concentrations was observed at the control site without any pollution source. The concentration levels of accumulated heavy metals were in the following order: seaweeds > sediments > seawater. Similar spatial distribution patterns were observed at the seaweeds, sediments and seawater for the highest mean values of the different heavy metals. This result show that seaweeds could be used as a biomonitors of heavy metals at coastal region.

• 한국음향학회:학술대회논문집
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• 한국음향학회 2000년도 하계학술발표대회 논문집 제19권 1호
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• pp.271-274
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• 2000

음파를 이용하여 덕트 내 길이 방향으로의 불규일 단면적을 측정하는 방법에 대해서 연구하였다. 이러한 역문제적 단면적 재구성은 덕트내의 비파괴 검사 및 인간 기도의 형상 조사 등에 중요한 의미를 지닌다. 음파를 이용하여 덕트내의 단면적을 재구성하는 과정은, 충격응답을 구하는 과정과 충격응답을 면적 재구성 알고리즘에 대입하여 덕트 내 단면적을 구하는 과정으로 나누어진다. 본 연구에서는 랜덤소스와 역푸리에 변환을 사용하여 덕트 내 충격응답을 구하였다. 예제를 통해 제안된 방법에 의해 덕트 내면적 재구성이 매우 정도 높게 실현 가능함을 보였다.

• KIEE International Transactions on Power Engineering
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• 제5A권2호
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• pp.159-170
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• 2005

This paper presents the design and development of a scaled down physical model for power Distribution Automation (DA) system simulation. The developed DA system simulator is useful in providing hands-on experience to utility engineers / managers to familiarize with the DA system and gain confidence in managing the power distribution system from the computer aided distribution control center. The distribution automation system simulator can be effectively used to carry out further research work in this area. This also helps the undergraduate and graduate students to understands the power distribution automation technology in the laboratory environment. The developed DA simulator has become an integral part of a distribution automation lab in the Electrical Engineering Department at Indian Institute of Technology Kanpur in India.

• 대한화장품학회지
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• 제29권1호
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• pp.89-101
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• 2003

A new collolidal silver (Ag) system is present in which a fine colloidal Ag is in situ deposited onto functionalized porous poly(ethylene glycol dimethacrylate) (poly (EGDMA)) microspheres. The effectiveness of Ag deposition was investigated considering the surface characteristics of poly (EGDMA) microspheres, The result reported in this study illustrates that the control of surface area and surface functionality (in this study, a hydroxyl group) of poly (EGDMA) microspheres is an important factor that determines practically the degree of deposition of colloidal Ag. The x-ray analysis showed that Ag nanoparticles were dispersed evenly inner and outer surfaces and has a face center cubic(fcc) phase. In the preservation test, the Ag-containing poly (EGDMA) microspheres had a powerful anti-bacterial performance, showing a high potential for a new preservative.

• Journal of Positioning, Navigation, and Timing
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• 제5권1호
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• pp.29-36
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• 2016

In this paper, performance on receivers of multilateration (MLAT) system that uses ADS-B signal, which is recently becoming popular, was analyzed to overcome shortcomings of existing aircraft flight control systems or reinforce the capabilities. A link budget was analyzed using a channel model in the airport environment with regard to Local Area Multilateration (LAM) for ground-controlled landing around the airport. In order to detect signals that arrived at the receiver successfully, sensitivity of receiver was analyzed using a signal-to-noise ratio (SNR) worksheet, and a method that improves accuracy of the distance measurement was proposed by adopting a peak estimation using sampling signals. Through simulations, optimum specifications of receivers were analyzed to have high precision positioning of LAM, and accuracy of LAM distance measurements was presented.

• 생물환경조절학회지
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• 제22권4호
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• pp.298-302
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• 2013

본 연구는 부산지역의 비가림하우스에서 오크라의 정식시기와 수량에 미치는 영향을 조사하기 위하여 수행되었다. 오크라의 품종은 '적오크라', '그린소드', '마루미짱', '베타화이브', '아카마루미짱' 등 5개 품종을 이용하여 6월과 7월에 정식을 실시하였다. 오크라의 초장과 절간장은 품종간에 유의한 차이가 있었다. 6월에 정식한 처리구에서 오크라의 초장과 절간장은 '아카마루미짱' 품종에서 가장 길었으며, '베타화이브' 품종에서 가장 짧았다. 반면, 7월에 정식한 처리구에서는 품종 간에 생육의 차이가 없었다. 오크라 과실의 수량은 정식시기에 따라 유의한 차이가 있었다. 오크라의 녹색 과실의 수량은 6월 정식에서 '베타화이브' 품종이 4,286kg/10a으로 가장 많았다. 또한, 녹색 오크라 품종은 6월 정식의 경우 '그린소드' 품종과 '베타화이브' 품종에서 수량성이 좋았으며, '마루미짱' 품종은 수량성이 낮았다. 따라서, 부산지역 비가림재배에서 정식시기는 6월 초순에 정식하는 것이 적합하였다.

• 한국농림기상학회지
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• 제7권4호
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• pp.282-288
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• 2005

본 연구는 전라남도 완도수목원의 붉가시나무 간벌처리구 임분의 4년 뒤 지상부 탄소고정량을 추정하기 수행되었다 간벌 처리구별 4년 뒤의 임분 생장은 임분예측표를 이용하였으며, 지상부의 건중량 분포는 $W=aD+bD^2$의 모형식을 이용하여 추정하였다. 간벌 처리구별 지상부 생체량은 대조구(148.4 ton/ha), 약도처리구(105.6 ton/ha), 중도처리구(68.7 ton/ha) 그리고 강도처리구(39.1 ton/ha) 분포를 보였다. 붉가시나무의 4년 뒤 간벌처리구별 탄소고정량은 건중량에 0.5를 곱하여 구하였으며, 대조구(74.2tonC/ha), 약도처리구(52.8tonC/ha), 중도처리구(34.3 tonC/ha) 그리고 강도처리구의 탄소고정량은 38.2 tonC/ha으로 조사되었다.

• Weed & Turfgrass Science
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• 제6권1호
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• pp.32-39
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• 2017

본 연구는 벼 재배 논에서 발생하고 있는 강피의 ACCase 저해 제초제에 대한 저항성을 검정하여 발생 지역을 파악하고, 벼 무논직파 재배시 저항성 강피에 대한 방제특성을 구명하고자 실시하였다. 그 결과, 전남, 전북 벼 재배 논에서 수집한 72종의 중에서 ACCase 저해 제초제 cyhalohop-butyl에 대하여 약 44% 정도가 저항성으로 판단되었다. 저항성 강피에 대하여 토양처리 제초제의 처리시기별로 방제효과를 보면 파종 전에 pretilachlor, butachlor, oxadiazon, oxadiargyl, oxadiazon+pretilachlor, fentrazamide+oxadiargyl의 처리 및 파종 후 10일에 bromobutide+fentrazamide+imazosulfuron, benzobicyclon+fentrazamide+imazosulfuron, pyrazosulfuron-ethyl+thiobencarb, fentrazamide+imazosulfuron, bromobutide+imazosulfuron+mefenacet, bromobutide+imazosulfuron+pyraclonil의 처리는 95% 이상, 파종 후 15일에 bromobutide+imazosulfuron+mefenacet의 처리는 95%, bromobutide+pyrazosulfuron-ethyl+pyriminobac-methyl의 처리는 90%정도 방제효과를 보였다. 파종 후 30일에 cyhalofop-butyl+propanil의 경엽처리도 90% 이상의 방제효과를 보였다. 또한 저항성 강피에 대하여 토양 잔류에 의한 방제효과를 보면 oxaziclomefone는 처리 후 40일까지 90% 이상 방제효과가 있었다. 따라서 벼 무논직파 재배 논에서도 ACCase 저해 제초제 저항성 강피를 효과적으로 방제할 수 가 있었다.