http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
제주도 지하수 질산염 농도의 시·공간적 변화 특성: 장기(1993-2015) 모니터링 자료의 평가
김호림(Ho-Rim Kim),오준섭(Junseop Oh),도현권(Hyun-Kwon Do),이경진(Kyung-Jin Lee),현익현(Ik-Hyun Hyun),오상실(Sang-Sil Oh),감상규(Sang-Kyu Kam),윤성택(Seong-Taek Yun) 대한자원환경지질학회 2018 자원환경지질 Vol.51 No.1
1993년부터 2015년까지 관측된 제주도 지하수 장기모니터링 관측정(N = 4,835)에서 수집된 지하수 수질자료(N = 21,568)를 기반으로 질산성질소의 시공간적 변동 특성을 평가하였다. 제주도 지하수의 질산성질소 농도의 중앙값은 2.5 mg/L로서 다른 국가나 대륙의 조사 결과에 비해 다소 높거나 유사한 것으로 나타났다. 또한 지하수 용도, 행정구역 및 고도 별로 유의한 차이를 보였다. 특히, 산간 지역에 비해 저지대 해안가에 위치한 농업 및 주거지역에서 농도가 높음을 확인하였다. Mann-Kendall 및 Sen’s slope 분석을 활용한 질산성질소 농도의 추세 분석 결과, 하류 저지 대에 비해 중산간지역에서의 질산성질소 농도 증가 경향이 뚜렷하였다. 제주도 내 토지 피복의 시계열 변화 특성과 결부 지어 보면, 중산간지역의 오염 증가 추세는 농업지역의 확장 등 인위적 활동 증가에 기인한 결과로 판단된다. 반면,기지정된 지하수자원특별관리구역에서는 전반적으로 질산성질소 농도의 감소 경향이 나타났는데, 이는 지하수 관리 측면에서 수질관리를 위한 적극적인 정책이 유효함을 시사한다. 본 연구에서는 제주도 지하수의 질산성질소 오염관리를 위한 적정 방안을 제안한다. The spatio-temporal variations of nitrate concentrations in groundwater of Jeju Island were evaluated by an analysis of time series groundwater quality data (N = 21,568) that were collected from regional groundwater monitoring (number of wells = 4,835) for up to 20 years between 1993 and 2015. The median concentration of NO 3 -N is 2.5 mg/L, which is slightly higher than those reported from regional surveys in other countries. Nitrate concentrations of groundwater in wells tend to significantly vary according to different water usage (of the well), administrative districts, and topographic elevations: nitrate level is higher in low-lying agricultural and residential areas than those in high mountainous areas. The Mann-Kendall trend test and Sen’s slope analysis show that nitrate concentration in mid-mountainous areas tends to increase, possibly due to the expansion of agricultural areas toward highland. On the other hand, nitrate concentrations in the Specially Designated Groundwater Quality Protection Zones show the temporally decreasing trend, which implies the efficiency of groundwater management actions in Jeju. Proper measures for sustainable groundwater quality management are suggested in this study.
오환섭,정효진,박상필,손두익 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
The damage of the pressure courage by degradation can become the reason of unexpected break down or failure accident and it is very important because safety accident, the production loss, environmental pollution, social problems are occur. Consequently The result to investigat of failure accident for domestic pressure vessel, the factor of degradation is SCC, Sorrosion, Cavity, Crack
오미록,김상수,박종대,백종철,김도익 順天大學校 1997 論文集 Vol.16 No.1
배추좀나방의 유충 기생봉인 프루텔고치벌의 기생특성에 대해 조사한 결과는 다음과 같다. 프루텔고치벌은 배추좀나방 유충의 모든 영기에 기생하였으나, 주로 2령과 3령충을 선호하였다. 온도별 프루텔고치벌은 배추좀나방 유충에 대한 기생율은 18, 20, 25, 30℃에서 각각 41.9, 66.0, 86.0, 68.7%였다. 프루텔고치벌은 배추좀나방 유충의 밀도가 증가함에 따라 기생수는 증가하나 그 증가율은 감소하는 Holling의 제2형(포화형) 기능반응을 나타내었다. This experiment was conducted to investigate the parasitic characteristics of Cotesia plutellae Kurdjumov, a larval parasitoid of Plutella xylostella L. Although C. plutellae parasitized all 4 instars of P. xylostella, it parasitized mainly the second and third instars. Parasitisms of C. plutellae at different temperatures were 41.9, 66.0, 86.0, and 68.7% at 18, 20, 25, and 30℃, respectively. The parasitic response curve of C. plutellae to the host density indicated Holling' type Ⅱ(saturation type) functional response: the parasitism of host by C. plutellae increased with the host density but the parasitic rate decreased.
오성남,윤동우,손영익,김갑일,임승철,강환일 명지대학교 산업기술연구소 2007 産業技術硏究所論文集 Vol.26 No.-
This paper aims to provide a way to improve dynamic stability of biped robots against undesirable disturbances and in a slope. By using an angular velocity sensor and an acceleration sensor on its waist, we can make a medium-sized biped robot walk stably in a slope against impulsive disturbances. In addition, it is possible for the robot to walk stably in an unknown slope. The measured signals from the sensor are used for compensating the reference angles of ankle, knee, and pelvis joints. Some experiments show that the stability of the robot is much enhanced by using cheap sensors and a simple algorithm. This work helps biped robots walk more stably in real environments.
오미록,김상수,박종대,김도익,백종철 順天大學校 1997 論文集 Vol.16 No.1
배추좀나방과 유충기생봉인 프루텔고치벌에 대한 살충제의 독성을 비교한 결과는 다음과 같다. 프루텔고치벌에 기생당한 배추좀나방의 유충은 fenvalerate, pyraclofos, spinosad와 chlorfluazuron의 충체침지 또는 엽침지시에 정상유충보다 현저히 감수성이 높았다. 그러나 Bacillus thuringiensis는 엽침지시에만 기생당한 유충에 독성이 약간 강하였다. Fenvalerate, pyraclofos와 spinosad의 잔류독은 배추좀나방 성충보다 프루텔고치벌 성충에 훨씬 독성이 강하였다. 그러나 chlorfluazuron과 B. thuringiensis의 경우는 두 종의 성충에 모두 별 영향이 없었다. 따라서 B. thuringiensis는 배추좀나방의 종합관리에서 프루텔고치벌에 직접적인 영향이 없이 사용할 수 있을 것으로 사료된다. The relative toxicity of some insecticides to diamondback moth, Plutella xylostella and larval parasitoid, Cotesia plutellae was evaluated. Diamondback moth larvae parasitized by C. plutellae were significantly more sensitive to fenvalerate, pyraclofos, spinosad and chlorfluazuron than nonparasitized larvae through direct dip- or leaf dip assay. However, Bacillus thuringiensis was slightly more toxic to parasitized larvae through direct dip bioassay. The residual toxicity of fenvalerate, pyraclofos and spinosad was significantly more toxic to C. plutellae adults than to P. xylostella adults. However, chlorfluazuron and B. thuringiensis have no serious effect to adults of C. plutellae and P. xylostella. These results suggest that B. thuringiensis could be used in integrated management of P. xylostella without direct effect on C. plutellae.
오성남,손영익 明知大學校 産業技術硏究所 2005 産業技術硏究所論文集 Vol.24 No.-
Owing to the environmental problems as well as increasing energy prices and power plant construction costs, many researches have been made for the safe operation of distributed generations. In order to be more popularly used in parallel with the distribution network, the distributed generation and its correlation with the power system should be exactly monitored at any time. This paper presents a monitoring system which displays the important states of the distributed generation in operation and stores various measurements of the system. The proposed system constructs a data-base for developing algorithms against any faults of the interconnected system, and monitors efficiently at any place with the communication network function.
오상철,김영호,현종익 濟州敎育大學 科學敎育硏究所 1983 科學敎育硏究誌 Vol.7 No.-
This is a study to develop the obervations and experimental materials for the elementary school 4th.5th.6th grade science curriculum that are carried on effect from this year. The materials which teachers do and the teachers and students can make, by themselves, are as follows: 1) In the field of biology for 4th.5th and 6th grade, 11 kinds of plant observating materials were cultivated. 2) In physics field of sixth units in the text book for 4th.5th and 6th grade, 10 kinds of implements were developed: electric circuit, moving of heat, expansion of heat and body, solute, movement of Earth and Moon, eaergy of Water and Wind.