• 원예과학기술지
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• 제19권3호
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• pp.338-341
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• 2001

설치비가 저렴하고 환경 오염의 우려가 없으며 양액 관리가 쉽고 농가에서 손쉽게 제작 설치가 가능한 수동적 양액 공급 시스템을 설계하여 시험을 수행하였다. 이 시스템을 이용하여 멜론 재배법을 확립하고자 농가에서 일반적으로 사용되는 자동양액 공급시스템을 대조구로 설치하여 작형별 생육 및 품질비교와 수동적 양액공급 시스템 재배에 적합한 배지선발 및 급액 농도에 따른 멜론의 생육 및 품질을 조사하였다. 수동적 공급시스템에서 과실의 발육 및 성숙후기에 배지 내 양액의 EC농도가 춘계재배 5.8-8.6mS/cm, 하계재배 8.4-13.2mS/cm 정도로 증가하는 경향이었으며 수동적 양액공급 재배가 넷트 발현이 5.0으로 우수하고 당도가 $15.5-16.0Brix^{\circ}$로 자동 양액공급에 비하여 $1\;2Brix^{\circ}$정도 높아 품질이 양호한 경향이었다. 수동적 양액 공급 시스템에서 멜론재배에 알맞은 배지는 펄라이트 70%에 훈탄 30%를 혼합한 배지가 다른 배지에 비해 과중, 당도, 넷트 형성이 양호한 경향이었다. 양액 공급 농도는 춘계작형에서는 정식 시 EC농도가 높은 2.0 및 1.5단위 변환, 하계작형에서는 1.0-0.5단위 변환 양액급액 관리가 과중, 넷트 형성 및 당도가 높아 품질이 양호한 경향으로 수동적 양액공급 시스템에서의 고품질 멜론재배 가능성을 확인하였다.

• 생명과학회지
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• 제22권1호
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• pp.87-91
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• 2012

암을 유발하는 phorbol ester로 알려진 Phorbol 12-myristate 13-acetate (PMA)는 동물세포에서 신호전달 효소의 하나인 protein kinase C (PKC)를 활성화시킨다. 본 연구에서는 옥수수 일차뿌리에서 PMA가 에틸렌 생성을 통하여 굴중성 반응을 조절하는 효과를 연구하였다. PMA는 8시간 동안 $10^{-6}$ M과 $10^{-4}$ M에서 농도 의존적으로 뿌리 생장과 굴중성 반응을 촉진시켰다. 이러한 촉진 효과는 PKC의 억제제인 staurosporine (STA)에 의해 상쇄되었다. 이 결과는 굴중성 반응이 신호전달 체계에 관여하는 protein kinase C를 통하여 조절될 가능성을 제시하고 있다. 식물호르몬인 에틸렌도 뿌리 생장과 굴중성 반응에 중요한 역할을 한다고 알려져 있다. 에틸렌 생성은 $10^{-6}$ M과 $10^{-4}$ M PMA에 의하여 각각 26%와 37% 증가하였다. PMA는 또한 ACC synthase (ACS) 활성을 촉진시켰다. 또한 이 증가 효과는 STA에 의하여 상쇄되었다. 이 결과는 옥수수 뿌리에서 굴중성 반응은 에틸렌 생성을 거쳐 protein kinase를 통하여 조절될 가능성을 제시하고 있다.

• 한국동물학회:학술대회논문집
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• 한국동물학회 2001년도 한국생물과학협회 학술발표대회
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• pp.252.2-252
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• 2001

No Abstract, See Full Text

• 대한원격탐사학회지
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• 제34권4호
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• pp.703-708
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• 2018

In recent years, subsidence due to excessive groundwater withdrawal is a major problem in the Kathmandu Basin. In addition, on 25 April 2015, the basin experienced large crustal displacements caused by Mw 7.8 Gorkha earthquake. In this study, we applied StaMPS- Persistent Scatterer InSAR (StaMPS PS-InSAR) technique to estimate the spatio-temporal displacements in the basin after the mainshock. 34 Sentinel-1 C-band SAR data are used for measuring subsidence velocity during 2015-2017. We found the maximum subsidence velocity of about 9.02 cm/year and mean subsidence rate of about 8.06 cm/year in the line of sight direction, respectively, in the central part of the basin.

• 대한원격탐사학회지
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• 제36권4호
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• pp.527-534
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• 2020

This study aims to monitor the displacement of the bridges using Stanford Method for Persistent Scatterers (StaMPS) time-series Persistent Scatterer Interferometric Synthetic Aperture Radar analysis. For case study bridges: Kimdaejung bridge and Deokyang bridge, we acquired 60 and 33 Cosmo-Skymed Synthetic Aperture Radar (SAR) data over the Mokpo region and Yeosu region, respectively from 2013 to 2019. With single-look interferograms, we estimated the long-term time-series displacements over the bridges. The time-series displacements were estimated as -8.8 mm/year and -1.34 mm/year at the mid-span over the selected bridges: Kimdaejung and Deokyang bridge, respectively. This time-series displacement provides reliable and high spatial resolution information to monitor the structural behavior of the bridge for preventing structural behaviors.

• 한국동물위생학회지
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• 제14권2호
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• pp.159-174
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• 1991

A field trial of norfloxacin on bovine 206, swine 222 and poultry 205 with respiratory diseases and diarrhea was conducted from Sept 1, 1990 to Jan 30, 1991 in Inchon and Kyonggi-do. The results are as follows. 1. Guinea pigs and rabbits were dosages 10 and 20 times normal. Ten days of observation saw no side effect. 2. Oral treatment on bovine, swine and poultry showed a curing rate of 82.00∼89.06%(Mean 86.00%), compared with 87.27∼96.36%(Mean 92.24%) by Injection. 3. The curing rate was 81.92% by the fourth treatment. 4. The curing rate with and without the use of adjuvant was 80.00∼100% and 83.60∼93. 10%, respectively, for swine, and 81.82∼100% and 82.00∼97.14% for bovine. 5. The curing rate was more dependent on seriousness of illness, environment and time than age. 6. The main disease causing bacteria of bovine respiratory diseases： Haemolytic Sta 27.62%, Haemolytic Str 33.33%, sum of this bacteria is 60.95%, diarrhea: Haemolytic coliform 80.20%, swine respiratory diseases； Haemophilus Spp 20.95%, Haemolytic Sta 72%, Haemolytic Str 21.90%, Sum of these bacteria is 68.57％, diarrhea; Haemolytic coliform 57.26%, poultry respiratory diseases； mycoplasma Spp 29.52%, Haemolytic Sta 13.33％, Sum of this bacteria is 42.85%, diarrhea； Haemolytic coliform 53.00%. 7. The curing rate of norfloxacin by species of strain, the unidentified bacteria on bovine respiratory diseases was the lowest with 77.78％, the others ranged from 84.21％ to 100％ with most of them over 90%. 8. The loss of clinical sign on bovine and swine was the highest when after 2∼4 application. 9. In terms of antibiotic sensitivity test, norfloxacin was the highest with 84.62∼100％ (mean 90.09％) among eight bacterias, only 5 of 15 antibiotics had a sensitivity of over 56.25%, showing a high degree of tolerance.

• 한국작물학회지
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• 제26권2호
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• pp.207-211
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• 1981

재식밀도를 달리하여 소향을 공시하고 생육, 수양 및 품질에 미치는 영향을 구명하고자 2개년(1979, 1980)동안 시험한 결과를 요약하면 다음과 같다. 1. 주당 절대 생장양과 액아 발생량은 소식구보다 밀식구에서 적었다. 2. 엽면적은 소식일수록 컸으나 엽면적지수는 밀식구에서 컸으며 단위 엽면적중은 처리간에 차가 인정되지 않았다. 3. 상대생장률은 소식일수록 후기 생육이 계속되었고, 초형은 밀식인 경우에 양분경합으로 상위엽의 전개가 저해되었으나, 수광율은 본, 상엽에서 광합성작용에 충분한 것으로 보였다. 4. 모용수, Total alkaloid 및 Total nitrogen 함량은 밀식구에서 적었고, 세포간극율, Total sugar 함량은 처리간에 차이가 없었다. 5. 수량은 밀식할수록 많아지는 경향이었으며, 품질은 처리간에 차이가 인정되지 않았다. 따라서 16,666주보다 밀식하여도 품질면에서 지장이 없을것으로 생각된다.

• 대한원격탐사학회지
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• 제37권1호
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• pp.139-151
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• 2021

By the end of December 2020, an earthquake with Mw about 6.4 hit Sisak-Moslavina County, Croatia. The town of Petrinja was the most affected region with major power outage and many buildings collapsed. The damage also affected neighbor countries such as Bosnia and Herzegovina and Slovenia. As a light of this devastating event, a deformation map due to this earthquake could be generated by using remote sensing imagery from Sentinel-1 SAR data. InSAR could be used as deformation map but still affected with noise factor that could problematize the exact deformation value for further research. Thus in this study, 17 SAR data from Sentinel-1 satellite is used in order to generate the multi-temporal interferometry utilize Stanford Method for Persistent Scatterers (StaMPS). Mean deformation map that has been compensated from error factors such as atmospheric, topographic, temporal, and baseline errors are generated. Okada model then applied to the mean deformation result to generate the modeled earthquake, resulting the deformation is mostly dominated by strike-slip with 3 meter deformation as right lateral strike-slip. The Okada sources are having 11.63 km in length, 2.45 km in width, and 5.46 km in depth with the dip angle are about 84.47° and strike angle are about 142.88° from the north direction. The results from this modeling can be used as learning material to understand the seismic activity in the latest 2020 Petrinja, Croatia Earthquake.

• 보건행정학회지
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• 제31권1호
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• pp.140-144
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• 2021

Catastrophic health expenditure refers to measure the level of the economic burden of households due to medical expenses. The purpose of this study was to examine the proportion of households that experienced catastrophic health expenditure between 2006 and 2019 using available data from the National Survey of Tax and Benefit (NaSTaB), Korea Health Panel (KHP), and Households Income and Expenditure Survey (HIES). Trend test was used to analyze the proportion of households with catastrophic healthcare expenditure. The households experienced a catastrophic health expenditure of 2.44% in 2019 using the NaSTaB data. Trend analysis was significant with the decreasing trend (annual percentage change [APC], -4.49; p<0.0001) in the proportion of households with catastrophic health expenditure. Also, the results of the 2017 KHP and the 2016 HIES showed 2.20% and 2.92%. The trend was significantly increased in the KHP (APC, 1.79; p<0.0001) and the HIES (APC, 1.43; p<0.0001). Therefore, this study suggests that further public healthcare interventions to alleviate the burden of catastrophic health expenditure, especially for low-income households, are needed.

• 보건행정학회지
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• 제32권1호
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• pp.107-112
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• 2022

Catastrophic healthcare expenditure refers to out-of-pocket spending for healthcare exceeding a certain proportion of a household's income and can lead to subsequent impoverishment. The aim of this study was to investigate the proportion of South Korean households that experienced catastrophic healthcare expenditure between 2006 and 2020 using available data from the National Survey of Tax and Benefit (NaSTaB), Korea Health Panel (KHP), and Households Income and Expenditure Survey (HIES). Trend test was used to analyze the proportion of household with catastrophic healthcare expenditure. In the NaSTaB 2020 data, households who experienced catastrophic health expenditure was 1.73%. Trend analysis was significant with the decreasing trend (annual percentage change [APC], -5.55; p<0.0001) in the proportion of households with the catastrophic health expenditure. Also, in the 2018 KHP and the 2016 HIES, households who experienced catastrophic health expenditure was 2.21% and 2.92% respectively. In contrast, the trend was significantly increased in the KHP (APC, 0.55; p<0.0001) and the HIES (APC, 1.43; p<0.0001). Therefore, the findings suggest the need to strengthen public health care financial support and monitor catastrophic healthcare expenditures, especially for low-income group.