• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 1996년도 경북지부 결성 및 추계학술발표회 논문집
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• pp.58-62
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• 1996

To check the variability of the effective diffusion coefficient in the unsaturated porous soil media. a Monte Carlo simulation was done for the equation suggested by Millington and Quirk(1961). The results shows that the probability density function of D$_{c}$/D$_{o}$ is positively skewed. It means the chance of having less effective diffusion coefficient values in the soil media than mean value is high. Also, the distribution types of D$_{c}$/D$_{o}$ are about same regardless of assumed distribution types of input parameters.ers.ers.

• 대한원격탐사학회지
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• 제21권1호
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• pp.59-72
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• 2005

Interferometric synthetic aperture radar (InSAR) is a remote sensing technique capable of measuring ground surface deformation with sub-centimeter precision and spatial resolution in tens-of­meters over a large region. This paper describes basics of InSAR and highlights our studies of Alaskan volcanoes with InSAR images acquired from European ERS-l and ERS-2, Canadian Radarsat-l, and Japanese JERS-l satellites.

• 농업과학연구
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• 제44권4호
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• pp.487-494
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• 2017

Spinosad and spinetoram are widely used insecticides for the control of lepidopteran larvae, leaf miners, and thrips; however, they might also have low toxicity toward beneficial insects like bees. Because these pesticides are easily photolyzed by ultraviolet radiation, the QuEChERS method, with its simple pretreatment procedure, is often used for analyzing residues of spinosad and spinetoram. The present study performed a residue analysis using a modified QuEChERS method by pretreating with ammonium salt. The limit of detection (LOD) of the modified method was 0.05 mg/kg and the limit of quantification (LOQ) was 0.25 mg/kg. The coefficient of determination ($R^2$) for the calibration curve was 0.999. Also, we examined any change in the adhesion of spinosad and spinetoram on the plants depending on a spray volume. The adhesion was approximately 70% when the spray volume was increased from 60 L to 120 L per 10 a whereas the adhesion was approximately 37% when the spray volume was increased from 125 L to 250 L. This showed that the amount of adhesion decreased with the higher spray volume. The efficacy result of spinetoram was that over 90% of Frankliniella occidentalis was controlled with the application volume of 125 L per 10 a. Therefore, the result of this study indicates that control of insects is effective and sufficient with a spray volume of 125 L per 10 a in paprika cultivation facilities.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.667-670
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• 2005

Ground control points(GCPs) can be extracted from SAR data given precise orbit for DTM generation using optic images and other SAR data. In this study, we extract GCPs from ERS SAR data and SRTM DEM. Although it is very difficult to identify GCPs in ERS SAR image, the geometry of optic image and other SAR data are able to be corrected and more precise DTM can be constructed from stereo optic images. Twenty GCPs were obtained from the ERS SAR data with precise Delft orbit information. After the correction was applied, the mean values of planimetric distance errors of the GCPs were 3.7m, 12.1 and -0.8m with standard deviations of 19.9m, 18.1, and 7.8m in geocentric X, Y, and Z coordinates, respectively. The geometries of SPOT stereo pair were corrected by 13 GCPs, and r.m.s. errors were 405m, 705m and 8.6m in northing, easting and height direction, respectively. And the geometries of RADARS AT stereo pair were corrected by 12 GCPs, and r.m.s. errors were 804m, 7.9m and 6.9m in northing, easting and height direction, respectively. DTMs, through a method of area based matching with pyramid images, were generated by SPOT stereo images and RADARS AT stereo images. Comparison between points of the obtained DTMs and points estimated from a national 1 :5,000 digital map was performed. For DTM by SPOT stereo images, the mean values of distance errors in northing, easting and height direction were respectively -7.6m, 9.6m and -3.1m with standard deviations of 9.1m, 12.0m and 9.1m. For DTM by RADARSAT stereo images, the mean values of distance errors in northing, easting and height direction were respectively -7.6m, 9.6m and -3.1m with standard deviations of 9.1m, 12.0m and 9.1m. These results met the accuracy of DTED level 2

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.542-545
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• 2005

Spaceborne radar interferometry has been widely used to estimate the topography and deformation of the Earth. It is difficult to obtain coherent interferometric SAR pairs especially over coastal areas mainly because of variation of surface conditions. We carried out the experiment using a cross-interferometric pair with a perpendicular baseline of about 1.4 km, a 30 minutes temporal separation and the height sensitivity of about 6 meters. The temporal decorrelation can be reduced by the cross interferometric technique with a 30 minutes temporal separation. Accurate coregistration was performed through resampling of ENVISAT ASAR data to equivalent pixel spacing to the ERS SAR data, because of the differences of the pulse repetition frequency and range sampling rate between the two sensors. Then we estimated range and azimuth offset to a sub-pixel accuracy using image intensity cross correlation. A larger window chip size than a general case was used because it was difficult to distinguish typical features. As range bin increased, the difference of Doppler centroid also increased. It resulted in lower coherence in far range than in near range. Coherences over wetland in near and far range were about 0.8 and 0.5, respectively. The coherence was improved by applying azimuth and range common band filtering, but coherence gap still existed. ERS-ENVISAT cross-interferogram usually lost information in urban area. However, high coherence over a city in this pair was shown, because of less man-made structures than other major cities. Accuracy of the DEM constructed by the ERS-ENVISAT 30-minute pair in a coastal area is to be evaluated.

• 한국대기환경학회지
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• 제20권2호
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• pp.175-183
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• 2004

In order to investigate the composition ratio and the emission rate of monoterpenes emitted from coniferous trees during summer, the enclosure chamber experiments were carried out for two tree species (Pinus densiflora and Pinus rigida). The major monoterpenes from the pine trees were $\alpha$-pinene, $\beta$-pinene, myrcene and $\beta$-phellandrene. There was no difference of the composition ratio between two sites for P. densiflora, but the difference was observed for P. rigida. Clearly, the ratio of $\beta$-pinene (26.1 %) for P. rigida was higher than that of $\beta$-phellandrene (12%) at the Gumsung mountain site, but the ratio of $\beta$-phellandrene (22.2%) was higher than that of $\beta$-pinene (9.9%) at the Chiri mountain site. Particularly, the composition ratio of $\beta$-phellandrene was higher than that of $\beta$-pinene for P. densiflora, and the opposite trend was found for P. rigida at the Gumsung mountain site. The characteristics of the composition ratio between two species were similar at the Chiri mountain site. As a result of the emission rate measurements, it was observed that both sites did not show any significant $\beta$ value (slope between emission rate and temperature) and ERs (Standard Emission rate at 3$0^{\circ}C$) difference. However, the $\beta$ value and ERs at the Chiri mountain site were slightly greater than those of Gumsung mountain site for both pine species. P. densiflora (1.703 and 1.971 $\mu\textrm{g}$C/gdw/hr) showed the higher monoterpene ERs than those of P. rigida (0.572 and 0.698 $\mu\textrm{g}$C/gdw/hr) at both sites.

• 생약학회지
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• 제7권3호
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• pp.199-208
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• 1976

저자(著者)등은 1976년(年) 7월(月) 17일(日)부터 동년(同年) 11월(月) 14일(日)까지의 기간(期間)동안 서울과 경기도내(內) 5개지역(서울 : 관악산, 경기도 : 수원, 광릉, 갈매리, 오산리)으로부터 100여 종(種)의 한국산(韓國産) 고등균류(高等菌類)를 채집하였으며, 이중 31종(種)을 분류(分類) 확인(確認)하였다. 분류(分類)된 31종중(種中) 9종(種) 즉 (1) Scutellinia scutellata $(St.\;A_{MANS})$ $L_{AM}$ (2) Peziza vesiculsa $F_{R}.$ (3) Helvella atra $F_{R}.$ (4) Neobulgaria pura $(P_{ERS}.)$ $P_{ETRAK}$ (5) Trametes coccinea $F_{R}.$ (6) Amanita melleiceps $H_{ONGO}$ (7) Cotylidia burtina $(P_{T}.)$ $I_{MAZ}.$ (8) Sarcodontia copelandii $(P_{AT}.)$ $I_{MAZ}.$ comb nov. (9) Sphaerobolus stellatus $P_{ERS}.$은 한국 미기록종(種)이며, 이외에 2종(種) (1) Lycoperdon D.M.C-2 및 (2) Tuber melanosporum도 잠정적으로 미기록종(種)이라 사료된다. 한편 Neobulgaria pira $P_{ERS}.$가 속해있는 과(科)인 Helotiaceae와 Sphaerobolus stellatus $P_{ERS}.$가 속해있는 과(科)인 Sphaerobolaceae는 각각(各各) 한국 미기록과(科)이다. 이에 저자등은 이들에게 신칭을 붙여 각각(各各)의 외부(外部)형태와 현미경적 특징에 대하여 기술하고, 이들의 사진과 함께 보고 하는 바이다.

• 한국공간정보시스템학회:학술대회논문집
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• 한국공간정보시스템학회 2000년도 학술회의 논문집 3권2호
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• pp.67-76
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• 2000

위성영상을 이용하여 지형도를 제작하는 새로운 방법으로 레이다 간섭기법이 활발히 연구되고 있다. 레이다 간섭기법은 같은 지역에 대한 두 장의 SAR 영상을 이용하여 고도값을 추출하는 방법으로, 기존의 SPOT과 같은 광학영상에 비하여 날씨나 시간의 제약을 받지 않고 지형정보를 얻을 수 있다는 장점을 가지고 있다. 그러나 레이다 간섭기법을 이용하여 고도값을 추출하는 방법은 처리과정이 복잡하고 기복이 심한 지역에서의 수직위치 정확도가 떨어진다는 단점을 가지고 있다. 본 연구에서 ERS-1과 ERS-2의 tandem 모드 SAR 영상을 사용하여 수치표고모형을 작성한 후 14개의 지상기준점에 대한 수직위치 정확도를 분석한 결과 14.06m의 오차를 보였다. 그러나 항공탑재레이다 시스템의 영상을 사용하여 수치표고 모형을 제작하면 $2{\sim}5m$의 수직위치 정확도를 얻을 수 있으므로 1/10,000이나 1/25,000 축척 지형도의 수정, 갱신에 활용할 수 있으리라 기대된다.

• EDISON SW 활용 경진대회 논문집
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• 제4회(2015년)
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• pp.14-23
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• 2015

Alzheimer's disease is one of the most common types of degenerative dementia. As a considerable cause of Alzheimer's disease, neurotoxic plaques composed of 39 to 42 residue-long amyloid beta($A{\beta}$) fibrils have been found in the patient's brain in large quantity. A previous study found that erythrosine B (ER), a red color food dye approved by FDA, inhibits the formation of amyloid beta fibril structures. Here, in an attempt to elucidate the inhibition mechanism, we performed molecular dynamics simulations to demonstrate the conformational change of $A{\beta}40$ induced by 2 ERs in atomistic detail. During the simulation, the ERs bound to the surfaces of both N-terminus and C-terminus regions of $A{\beta}40$ rapidly. The observed stacking of the ERs and the aromatic side chains near the N-terminus region suggests a possible inhibition mechanism in which disturbing the inter-chain stacking of PHEs destabilizes beta-sheet enriched in amyloid beta fibrils. The bound ERs block water molecules and thereby help stabilizing alpha helical structure at the main chain of C-terminus and interrupt the formation of the salt-bridge ASP23-LYS28 at the same time. Our findings can help better understanding of the current and upcoming treatment studies for Alzheimer's disease by suggesting inhibition mechanism of ER on the conformational transition of $A{\beta}40$ at the molecular level.

• 한국조사연구학회지:조사연구
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• 제12권2호
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• pp.51-76
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• 2011

본 연구는 조사항목에 체계적으로 응답하는 경향인 응답스타일과 성격특성과의 관련을 탐색한다. 보다 구체적으로, 내용에 관계없이 설문문항에 긍정적으로 응답하는 경향인 묵인응답스타일(ARS)와 가장 극단의 응답범주를 지지하는 경향인 극단응답스타일(ERS)이 외향성, 친화성, 성실성, 정서적 안정성, 경험에 대한 개방성 등 성격 5요인 모형에 의해 어느 정도 설명되는지를 검증한다. 2009년 일반종합사회조사의 자료를 이용하여, 응답자의 특성과 면접상황의 효과를 통제한 상태에서, 성격특성변수가 ERS와 ARS 성향에 미치는 효과를 분석하였다. 분석의 결과, ERS의 발생은 응답자의 외향성, 개방성, 친화성, 성실성과 정적인 관련을 맺고 있었으며, ARS는 성격특성과의 관련이 발견되지 않았다. 분석결과의 함의와 함께 응답스타일에 따른 편의의 문제를 해결하기 위한 방법들과 그 한계점이 논의되었다.