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.

個人用 컴퓨터를 利用한 水力發電댐의 流入量 豫測

權五憲,李尙和 忠南大學校 産業技術硏究所 1986 산업기술연구논문집 Vol.1 No.2

The main purpose of the study is to develop a computer program in the personal computer which calculates numerically the inflow from the rainfall and displays the inflow hydrograph on a CRT. The computer programs, which were developed for the inflow forecasting of the short-range, employed the storage function method. The program which computes the inflow from the rainfall would be applicable effectively both to planning the daily/weekly power generation and to operating the dam for the flood control. The inflow calculated by the computer program gave a good agreement with the actual inflow for the Choon Chun and the Cheong Pyung dam.

인도의 통신규제 정책과 시장 분석

권오성 국제무역학회 2004 국제무역연구 Vol.10 No.2

인도는 향후 세계 경제강국으로 부상할 BRICs 국가중의 하나로 시장잠재력이 매우 큰 나라이다 인도의 IT산업은 소프트웨어 부문의 급성장에 힘입어 발전하고 있지만, 통신부문은 상대적으로 발전수준이 낮아 통신인프라 구축이 매우 열악한 수준이다. 이에 따라 인도정부는 IT산업 발전의 걸림돌로 작용하고 있는 IT인프라 수준을 높이기 위해 국가정보화 정책의 일환으로 통신망 현대화를 추진하고, 통신사업자간 경쟁을 통해 통신망구축을 촉진시키는 통신자유화 정책을 적극적으로 추진하고 있다. 따라서 IT강국의 위치를 굳히고 있는 우리나라의 경우 인도의 정보통신시장에 대한 보다 적극적인 진출 전략을 추진하여야 하며, 이를 위해 인도정부가 추진하고 있는 정보통신정책과 통신 시장을 심층적으로 분석할 필요성이 존재한다. 본 연구에서는 인도 정보통신시장의 진출전략을 국가 차원과 기업 차원에서 제시하였다. In the era of so-called knowledge-based economy, the creation and utilization of IT and new knowledge are recognized as core factors to enforce IT industry and to increase national competitiveness. Advanced countries, therefore, have heavily invested their resources on IT sector and introduced competition into the telecommunication market. India is trying to make informationized society through telecommunications market liberalization and IT industry development. India is investing lots of resources to construct telecom infrastructure such as wired and wireless network and consider informationized society promotion as top national agenda. In this effort, Korea is a benchmarking model for them. Successful entering into India telecommunications market requires close analysis and correct understanding of its telecom regulatory policy and infrastructure level. In this paper, therefore, tried to analyse telecom and IT policy, telecommunications market and carriers of India, which have high potential of economic cooperation in IT sector with Korea. And based on this analysis, tried to find out ways to enter into telecommunications market of India.

호중구감소증 환자에서의 기관-기관지 아스페르길루스증 1예

권재철,송명준,김기조,오유경,김성용,박선희,최수미,이동건,이석,신완식,김춘추 대한감염학회 2004 감염과 화학요법 Vol.36 No.1

저자들은 급성 림프구성 백혈병 환자에서 항암치료 후 호중구감소증이 지속되는 상태에서 침습성 아스페르길루스증의 드문 형태인 치명적인 아스페르길루스 기관기관지염을 경험하고 문헌고찰과 함께 증례를 보고하는 바이다. Tracheobronchial aspergillosis is an uncommon clinical form of invasive aspergillosis, particularly found in patients with AIDS and in lung transplant recipients than in other immunocompromised patients. The rapidity of the disease progression can result in fatal airway obstruction in a short period of time that the patient may need emergency tracheostomy without knowing the cause of the obstruction. We describe a case of fatal tracheobronchial aspergillosis which developed in a 43-year-old female patient with acute lymphoblastic leukemia. Dyspnea and stridor developed on the 20th day after 2nd consolidation chemotherapy, which was during the prolonged neutropenic period. Airway narrowing was observed on the computed tomograph scan of neck and emergency tracheostomy was performed. Infiltration with aspergillus hyphae was found in the tracheal ring and bronchial mucosa. Despite the use of amphotericin B, the patient died of bleeding and airway obstruction.

Midfacial degloving approach을 이용한 양측성 상악골절제술의 치험례

오재권,류동목,이상철,김여갑,이백수 大韓顎顔面成形再建外科學會 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.6

Maxillary cancer accounts for only 0.3% of all cancers and tumors of the nose and paranasal sinuses are 80% of maxillary neoplasms. The complexes of midfacial anatomical landmarks make the extension of the maxillary cancer more easy. In 1826 since Lazar first made unilateral maxillectomy for the maxillary cancer, various developments were evoluated and in the surgical approach of these lesions most oral & maxillofacial surgeons have used the vestibular approach or Weber-Fergusson approach and also unilateral lesions are common but bilateral lesons are rare. In 1992 Sjovall introduced the bilateral maxillectomy and for the preventions of the facial scar, In 1927 Portmann and Retrouvey reported the sublabial approach and In 1979 Price reported the midfacial degloving approach and in 1981 Allen and Siegel used the term "Midfacial degloving approach". Unlike the previous used Weber-Fergusson approach and Caldwell-Luc method, midfacial degloving method can make the intraoral approach of midfacial structure exposure without facial incision and has populated gradually for the removal of tumors and facial plastic surgery. In this case, two male pt. with bilaterally extensive malignant neoplasm on maxillary sinus was treated with pre or post op. radiotherapy and then underwent the bilateral subtotal maxillectomy via midfacial degloving approach and relatively satisfactory results were obtained.

어류의 패내 산란과 석패과 유생의 어체부착

권오길,박갑만,이준상,송호복 江原大學校 附設 環境硏究所 1991 環境硏究 Vol.8 No.-

This study was carried out to determine the attachment parts and rates on the host fish and the successive stages of the glochidial encystment. A scanning electron microscope observation of the glochidia, the larvae of freshwater brivalve, Anodonta arcaeformis flavotincta, on the host fish, Carassius auratus, was conducted. The attachment rates on the host fish were 30.1%, 22.3% on the pectoral, the caudal, and the pelvic and anal fin, respectively. Glochidia, once attached to the host, have become encysted within 27 hours. The glochidia in fish tissues have sloughed between 13 days and 15 days when the water temperature was 16℃ in laboratory. During encystment, the epithelial cells of the host fish migrated actively toward the attached glochidia and covered them. In the encystment process, the encysted tissues in the host have become loose in seven days and exposured a pat of the glochidium in eight days after infection. No changes of the glochidial size have found before attachment and after sloughing.

産業別人口에 의한 都市機能 分類에 관한 硏究

權俊五,林相鎬,金宇赫 조선대학교 국토개발연구소 1995 국토개발연구 Vol.15 No.2

This study groups the cities by function with standard deviation and multi-variable analysis using the rate of industrial employees selected from city-level cities in Korea and the results are arranged as follows. First, in classifying the cities by standard deviation, the cities showing relatively specialized industry in comparison with other cities and the employment rate more than M+2SD are Ku-mi and Kim-hae cities in the part of manufacturing in 1981, Nam-won city in that of construction in 1981, Dong-hae city in finance, insurance, real estate and other service industries in 1981, and Kumi-city in manufacturing industry, Chung-mu, Chung-ju and Seo-kywipo cities in warehouse, transportation and communication industry, Pohang city in finance, insurance, real estate and other service industries and Tae-baek city in social and personal service industries in 1991. Second, the cities having more than M+3SD can be interpreted that they are extremely specialized in the related industry in comparison with other cities and Kun-san and In-chon cities were classified in the construction an Che-ju and Seo-Kywipo cities in social and personal service industries in 1981 and Kim-Hae city was classified in manufacturing industry and Inchon in the construction in 1991. Third, as a result of executing the cluster analysis, the cities which belong to the first group are Su-won, Sung-nam and Ahn-yang and those that belong to the second group are Mok-po, Kwa-chun and Choon-chun.

한국음악의 변조 구조

권오성 한양대학교 음악연구소 2000 音樂論壇 Vol.14 No.-

螺鈿硏究

권상오 신라대학교 예술연구소 1999 예술연구 Vol.4 No.-

전하이동 착물형성에 따른 Mechanism 및 용매의 영향

權五윤,崔相元,徐鎬埈 여수대학교 1989 論文集 Vol.3 No.-

The formation of charge transfer complex between iodine and aniline in CHCl₃CHCl₄: CH₂Cl₂(1:1), CH₂Cl₂have been studied kinetically by using conductivity method. The initially formed outer charge transfer complex was transformed into a inner charge transfer complex. The pseudo first order rate constants and activation entropy are affected by solvent dielectric constant. The second order rate constants for the decomposition of the outer charge tranfer complex (first order in aniline and in the outer charge transfer complex) depend on the aniline concentration. The ease with which the transfermation proceeds depends on the relative magnitudes of the enthalpy of formation of the outer charge transfer complex as well as aniline concentration.