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.

갯쑥부쟁이(Heteropappus hispidus (Thunb.))의 감마방사선 감수성과 M1 세대 형질변동 특징

오병권,홍경애,송성준,유장걸,이선주,이영일 제주대학교 방사능이용연구소 2003 연구보고 Vol.17 No.-

제주도에서 자생하는 갯쑥부정이(Heteropappus hispidus(Thunb.))에 감마선을 10, 20, 40, 80, 120, 160, 200, 300, 400Gy 수준으로 나누어서 조사한 뒤 발아율 및 발아 30일 후의 본엽 출현을, LD_(50), 본엽길이, 줄기부분의 안토시아닌 색소 형성 유무, 생육 60일 후의 로젯형 엽, multi-shoot 형성율, 초장, 채화 결실율등의 주요 양적형질들을 생존개체를 대상으로 실시하였다. 120Gy 까지의 발아율은 88.5%로 대조구와 큰 차이를 보이지 않았으나 160Gy 이상에서 부터는 급격히 감소하여 치사선량(LD_(50))은 160Gy 범위 정도였다. 또한, 본엽 출연율과 그 길이는 조사선량이 높아질수록 억제되었다. 안토시아닌 색소 형성은 조사전량이 높을수록 대조구 2%에서 30%로 높아졌으며 로젯형도 고선량 처리구에서 발생하였다. Multi-shooting은 80Gy 이상일 때 부터 나타났으며 multi-shooting을 형성하는 개체들은 초장은 짧고 줄기는 가늘게 다발형으로 자라는 특성이 있어서 만일 형질이 고정된다면 화분 관상용 개체로 선발하기에 적합하였다. 특히, 조사선량이 증가됨에 따라서 안토시아닌 색소 형성, 로젯형 개체, multi-shoot등의 개체가 많이 출현되었는데 이는 돌연변이 유기의 선발지표가 될 수 있을 것으로 보인다. The seeds of naturally growing Heteropappus hispidus Thunb were treated by nine different doses(0, 10, 20, 40, 80, 120, 160, 200, 300, 400㏉) of gamma rays to investigate their germination rate and to quantify the characteristics of their germinated plant as like as leaf appearance and length, the formation rate of anthocyanin color in stem 30 days after germination, the formation rate of rosette leaf and multi-shoot, the flowering and seed-bearing, and shoot length. The germination rate at least up to 120 ㏉ was not greatly affected but was rapidly decreased at over 160 ㏉. It seemed that lethal dose(LD_(50)) of germination was 160 ㏉. The leaf appearance and growth was also inhibited, but the formation rate of anthocyanin color in the flower stem was enhanced up to 30% with dose. The rosette plants were observed in plants irradiated with higher than 40 ㏉. Multi-shoots were developed over 80 ㏉. For a short shoot length and bundle of thin stem, it was considered that they can be selected as the potential pot flower plants, through genetic fixation. In particular, it was suggested that the formation of anthocyanin color in flower stem, rosette and multi-shoot plants induced by the morphologically markers for the mutant selection of Heteropappus hispidus (Thunb.)

Chloroform 용매 중에서 Aniline과 Iodine간의 Charge Transfer Complex 형성 Mechanism에 대한 연구

권오윤,崔相元,金南政 여수대학교 1989 論文集 Vol.3 No.-

The formation of charge transfer complex between indine and aniline in chloroform solvent have 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 aitivation entropy are affected by aniline concentration. The second order rate constants for the decomposition of the outer charge transfer complex(first order in aniline and in the outer charge transfer complex) depend on the aniline concentration. The ease with which the transformation proceeds depends on the relative magnitudes of the enthalpy of formation of the outer charge transfer complex as well as dielectric properties of aniline.

아파트단지의 규모에 따른 적정 내부도로 패턴설정에 관한 연구

권오상,이영무 홍익대학교환경개발연구원 1997 환경개발연구논문집 Vol.2 No.-

The purpose of this is to establish inner road pattern according to the size of a residential complex, namely 250m×250m as small complex 500m×500m medium complex and 1km×1km large one. The criteria of establishing road pattern NO.1, efficient access to each apartment buildings from such outside roads as the artery roads or the collector-distributer roads. NO.2, guaranteeing the safety of occupants by way of eliminating the through traffic which poses not only traffic congestion but also safety hazards. NO.3, further enhancing the living condition of occupants by separating the pedestrians from vehicle movements. Inner pattern of road system of any apartment complex greatly depends on the configuration of the site, exterior road and adjacent land use. In this study, the exterior condition is ignored in order to create prototype models. Accordingly the sites are shown as squares in three different sizes, small, medium and large, in order to establish the conceptual guidelines. The results are ; small complex is best suited with the single through road which comes in from one end of the site and goes out through the other end. The medium and large sites are best served with a ring road at the center and branching access roads towards the perimeter, the former with four and the latter with eight.

韓服地의 力學的 特性에 關한 硏究 : (第2報)女子用 秋冬韓服地 (Part 2)On the Women's Fall & Winter Fabrics

成秀光,高在運,權五敬 한국의류학회 1988 한국의류학회지 Vol.12 No.2

In the part 1, relations were found between fundmental mechanical properties and primary hand values, performance of Korean women's summer fabrics. In this paper, in order to investigate the hand values and mechanical properties such as tensile, shearing, bending, compression, surface and thickness & weight of the women's fall & winter fabrics were measured by KES-F system. Sorts of 90 commercial fabrics for women's fall & winter clothes were classfied into 39 silk and 51 polyester fabrics according to meterials. The experimental results were analysed statistically to relate the hand values and the mechanical properties and concerning to formation of weared clothes and transformation behavior were investigated. Furthermore, there mechanical properties as well as their hand values were discussed in comparison with those values for kimono fabrics. The main results are summarized as follows; 1. The shape of silk fabrics in formation for weared clothes show a box-shaped silhouette. Polyester fabrics has a easy to shape-less and make a silhouette which goes along with the body. 2. Silk fabrics for Korean women's fall & winter clothes have ±1σ range of bending, shearing, surface properties and thickness as compared with kimono fabrics. 3. A wrinkle recovery and drapability of silk fabrics for Korean women's fall & winter clothes are inferior to kimono fabrics. On the other hand, the fabrics for Korean women's fall & winter clothes have conical-shaped silhouette based on higher bending rigidity. 4. Except for flexibility with soft feeling, a primary factor of mechanical properties contributes to the hand values of fabrics for Korean women's fall & winter clothes having no concern with materials were same as the women's summer fabrics. 5. As for the hand values of fabrics for Korean folk clothes, stiffness, anti-drape stiffness are larger than those of kimono fabric and stiffness, anti-drape stiffness, crispness of fabrics for Korean women's fall & winter clothes have smaller values as compared with Korean women's summer fabrics.

변형된 미끄럼 탐색 기법을 이용한 고속 프랙탈 영상압축

오우진,권상근 金烏工科大學校 1998 論文集 Vol.19 No.-

Fractal image coding applies the self-similarity of image. But it takes long time to search for the self-similarity block. To shorten the searching time. we proposed the modified sliding search algorithm which employs the classification of variance of range and domain blocks. For some blocks which have small variance, only mean value of range block is transmitted without searching. Compared with sliding search algorithm, our algorithm shows 15% lower in bit rate and 21% gain in searching time, but PSNR decreases only 0.05 dB.

프랙탈차원을 이용한 고인성 균열진전거동의 평가에 관한 연구

권오헌,윤유성 釜慶大學校 1998 釜慶大學校 論文集 Vol.3 No.2

The application of fractal concept provides an useful method in the study for the quantitative analysis of highly irregular fracture surfaces and crack profiles. Fractal curves have a characteristic that erpresents a self similarity as an invariant based on the fractal dimension. The fractal dimensions were obtained by the method of a box counting. In this report, we obtained the nearly stable fractal dimensions of fracture crack profiles for the STS316 with CT specimen as the crack advances and the relationship between fractal extension crack lenght and fractal dimension. From the results, we concluded that the crack profile of high toughness material shows the fractal characteristic also, which can be used in order to evaluate more precise prediction of the crack life.

자연생태계의 가치평가

권오상 서울대학교 농업개발연구소 1999 농업생명과학연구 Vol.3 No.-

The contingent valuation method (CVM) is a widely used analytical tool to derive the economic value of ecology conservation. However, CVM has a strong limitation in evaluating multiple attributes of ecology since it usually compares only two possible states of ecology. On the other hand the contingent ranking method (CRM) which is a generalized model of referendum-type CVM can be usefully used for the purpose of evaluating multiple attributes of ecology. We constructed a CRM model and applied it to the ecology conservation of Kwanggyo mountain. Both use and nonuse values of the ecology have been estimated. The economic value of each attribute of ecology also has been derived.

3차원 디지털 모형을 이용한 양악 치조골 전돌자의 치열궁 특성 연구

권오원,이수경,성재현 대한치과교정학회 2006 대한치과교정학회지 Vol.36 No.1

최근 안모의 심미성이 중요시되면서 구순 돌출로 인한 비심미성을 해소하고자 내원하는 양악 치조골 전돌자의 수가 증가하는 추세이다. 그러나 이러한 환자에 대한 연구는 많지 않으며 특히 모형을 이용한 연구는 극히 적다. 모형을 이용하는 연구는 주로 손으로 직접 계측하거나 2차원 평면에서 컴퓨터를 이용하여 측정하였으나 근래에 3차원 레이저 스캐너가 도입되면서 모형을 이용한 연구를 좀 더 빠르고 간편하면서도 정확하게 할 수 있게 되었다. 이 연구는 3차원 디지털 모형을 이용하여 양악 치조골 전돌자의 치열궁 특성을 알아보기 위한 것이다. 양악 치조골 전돌자 20명과 정상교합자 20명을 대상으로 치아 크기, 치열궁 폭경 및 치열궁 길이, 치열궁과 구개의 형태를 비교하여 본 결과 양악 치조골 전돌자는 정상교합자보다 치아 크기가 크고, 하악 견치간 폭경 및 제1소구치간 폭경이 크며 치열궁 길이가 길었다. 그리고 치열궁 형태와 구개 형태에서 정상교합자와 차이를 보였다. Recent beauty trends have caused an increase in the number of bialveolar protrusion patients seeking treatment of lip protrusion. But studies of these patients are not common. Studies using their dental models are especially rare. Dental models have been measured manually or through a computer by digitizing two dimensional images of models. Nowadays, we are able to study dental models more easily and accurately by utilizing the three-dimensional (3-D) laser scanner in dentistry. An investigation was carried out to evaluate the characteristics of the dental arch in a bialveolar protrusion group in comparison with a normal group using 3-D digital models. The normal group was composed of 20 subjects who were selected from students of the School of Dentistry, Kyungpook National University. The bialveolar protrusion group was composed of 20 subjects who visited for treatment at the Department of Orthodontics, Kyungpook National University Hospital. Tooth size, arch width and arch length were measured digitally, and arch shape and the shape of the palate were drawn. Based on the results of this study, the differences of the arch characteristics in the bialveolar protrusion group were that the size of the teeth was larger, mandibular canine width and 1st premolar width were wider, and arch length was longer than in the normal group. And there were differences in the arch shape and the shape of palate between the bialveolar protrusion and normal groups.

都市便益施設에 의한 定住環境 分析에 관한 硏究

權俊五,金宇赫,姜聲泰 조선대학교 국토개발연구소 1996 국토개발연구 Vol.16 No.1

This Study is to obtain the technical index using the urban facilities on the objects of urban in Korea, compares and analyzes the urban scale of according to the population, analyzes the living environment of urban and them is to suggest the policies for the balanced development of nation and the effective growth of urban systems, and the research of nation and the effective growth of urban systems, and the research results are as follows; ① in the case of the urban of the population more than 500,000, educational, hygienic and cultural facilities have the most influence on it, ② in the case of one with 200,000 to 500,000, information, communication, social welfare, administration and leisure facilities and ③ in the cse of one with population less than 200,000, social welfare, leisure and hygienic facilities, so, it is considered that the expansion of each urban facility is required in the living environment of each city.