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.

고속회전 하는 정밀부품을 위한 연질/경질 코팅의 트라이볼로지적 특성에 관한 연구

오진규,정구현,김대은,유제환,김형재 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-

Recently, rotating elements which use mechanical and electrical systems have been utilized for high speed and accuracy to increase the performance. The most important thing to get a more reliable system is to understand the friction, wear and characteristics which has an effect on various coated surfaces. In this study, the tribological characteristics of various soft/hard materials were investigated by using a custom-built pin-on-reciprocator tester. From the experimental results, it was found that the friction coefficients of the soft material coated surfaces were lower under various normal loads due to thier self-lubricating ability and material transfer to the counter surface.

接觸酸化法을 利用한 LAS 除去效率에 關한 硏究

오종민,구태회,진현오,윤동선,박재영 경희대학교 환경연구소 1997 環境硏究 論文集 Vol.7 No.-

This study was performed to know LAS concentration in the small urban stream and estimate the LAS removal efficiency when apply to natural purification method with variable media. When we used gravel and concrete as media, the average LAS concentration of influent was 819.7㎍/ℓ (112.0 ∼ 1671.0 ㎍/ℓ). The average LAS concentration of effluent gravel media reactor was 58.5 ㎍/ℓ (0 ∼ 158.4 ㎍/ℓ) and average removal efficiency was 93.8%. The average LAS concentration of effluent concrete media reactor was 33.1 ㎍/ℓ (0 ∼ 136.8 ㎍/ℓ) and average removal efficiency was 96.1%. And when we used tire and scrubber, the average LAS concentration of influent was 693.7 ㎍/ℓ (241.5 ∼ 1330.3 ㎍/ℓ). The average LAS concentration of effluent tire media reactor was 88.4 ㎍/ℓ (47.8 ∼ 131.8 ㎍/ℓ) and average removal efficiency was 83.9%. The average LAS concentration of effluent scrubber media reactor was 26.1 ㎍/ℓ(0 ∼ 58.9 ㎍/ℓ) and average removal efficiency was 95.3%.

성장호르몬과 프로락틴을 분비하는 뇌하수체 선종이 동반된 Albright증후군 1예

오효정,김용성,신진호,김하영,박병현,조정구 圓光大學校 醫科學硏究所 2005 圓光醫科學 Vol.20 No.1

土地公法論의 體系化에 관한 硏究 : 實定法上 土地의 公的槪念을 中心으로 with special reference to the public concept of the existing land related provisions in Korea

吳顯鎭 청주대학교 1987 한국사회과학연구 Vol.6 No.-

Public announcement laws about land are on the rise in this country nowadadys and its kinds are amount to 100. I think since such public land laws are made according to occasional needs, there exist a lot of problems such as lack of essential concept and purpose of public land law, lack of fairness, equity and consistency. Therefore this writer try to attempt following studies to systematize public land laws. 1) I try to seek common denominator about concept of land among related clauses of consitution, which is basic law, as well as those of private laws and public laws to define concept of land in terms of law, 2) I took a look at characteristics of public land laws as a part of administrative law and foundations and limits of public land law regulation as embodying law of constitution in connection with guarantee of property right in terms of private law, 3) I criticize division of land ownership and land use rights with respect to public land concept, which took place during the systematization process of public land law. Also, I study administrative authority's planning discretion on the land and a balance comparing theory of West Germany and system of advance anouncement about law-making, citizen's participation, which were introduced as prior filtering system between realization of public interests and guarantee of private law, judicial control as a means of post relief system and infringement by expropriation likeness and expropriation itself. 4) I deal with land law systems of both west Germany and Republic of Chaina in connection with directions and models of public land law systematization. To systematize public land laws. 1. This Writer try to define land as a public concept on the life space by grasping basic concepts on the regulation of both public law and private law as interdependence and compensative coodination between realization of public purpose and guarentee of private rights. 2. I try to de vide public land law as a public burden act which was treated at past administrative law, into. 1) Burden on the land use and returns (profits) . 2) Burdens on the returns profits and disposal of land. Then I divide the former into again, ① restriction for public use, (O˝ffentlich-rechtliche Eigentumsbeschra˝nkung). ② replotting for public use, (Urnlegung, Zusammenlegung). the latter into ⅰ) expropriation for public use. (Enteignung, Compulsong acquisition). ⅱ) licence system and reporting system of land transaction, etc. 3. Since modern state is called planning state and we feel the importance of planning at the every sphere of our life, Planning laws play very important roles in conjunction with realization of public interests as well as protection of private rights. So, We'd like to separate planning restrictions from restrictions for the public use, and make public land law become land planning laws. 4. We'd like to unite laws about site, structure, standard of facilities and use of buildings into constructional regulation act as a part of public land law. 5. Finally, I demand to introduce Basic Land Act like Taiwan as a way of systematization of public land law.

컴퍼니제 관리회계의 발전과 구조에 관한 연구

오성렬,서현진 제주대학교 경상대학 경영경제연구소 1999 경영경제연구 Vol.1 No.-

GMAHN 환경에서의 TCP 프로토콜 성능 분석

吳世德,金玄旭,李光培,張良根,裵振勝,金在浩 明知大學校 産業技術硏究所 2007 産業技術硏究所論文集 Vol.26 No.-

Recently, GMAHN that provides interface between MANET and Wired Network has been focused in Mobile Communication. It is necessary that The technology provide reliable data transmission technology between mobile node and wired network in MANET environment that varing by the node movement. In this paper, using the TCP protocol(Tahoe, Reno, Vegas, SACK)that increases reliability between source and destination, we applied the TCP protocol mechanism to various environment, and compared result, and also proposed the efficient TCP mechanism by comparing each mechanism.

EUCLID 기하에서의 평균의 이해

현진오,오창은 濟州大學校 師範大學 科學敎育硏究所 1998 科學敎育 Vol.15 No.-

This study approaches geometrically to different means such means such as arithmetic, the geometric, and the harmonic mean which are handled in the present cumculum of highschool mathematics and tries to give different definitions to these means and to find out another mean. It compares these means with each other on figures through Euclidean geometry. It makes a special study of the properties of each mean and the rrlations among these means about positive real numbers. It also introduces Inverse points and Harmonic points by generalizing more the geometric and the harmonic means.

樹種의 差異가 樹冠通過雨, 樹幹流의 水質에 미치는 影響

陳鉉五,金英彩,金洪律,朱榮特,吳鍾敏 慶熙大學校 1997 論文集 Vol.26 No.-

The chemistry of precipitation, throughfall and stemflow throughout different components of forest stands were compared to broadleaved and coniferous forest stands common in the central part of Korea. Included this report is information on the distribution and chemistry of rainwater as it affects the characteristics of nutrient cycled as throughfall and stemflow in different stands. In all species. dissolved element concentrations showed increase precipitation < throughfall < stemflow, especially, Mg, K and SO_4 of throughfall and stemflow of coniferous forest were net increase in passing through the canopy, branch and bark. Both precipitaion and throughfall concentrations showed negative relation to on the other hand, pH of throughfall was positive relation to precipitation amounts. In coniferous stand, stemflow of low pH probably acts to accelerate the nutrient cycling of soil ecosystem

土地法의 性格에 관한 硏究

吳顯鎭 청주대학교 사회과학연구소 1988 한국사회과학연구 Vol.7 No.-

We can devide the land law in the public land law and private land law according to the dicho tonomous system of law classification. But rapid industrialization and urbanization have caused a lot of problems such as labor problems, unfair trade by economic monopoly, and land speculation. Labor problems can be solved with the helf from the labor law, mono-poly and unfair trade can be solved with the helf from economic law, other social problems can be solved by the so-called social law. But the land law, which doesn't have clear definition and its system, use public land regulations including land texation to solve the land problems. There are a lot of land laws which have the social law characteristics as well as both public law characteristics and private law characteristics. But no one claims that the land law has the soial law characteristics Therefore, this writer said that the land law has social law characteristics because of following reasons. 1) Land is natural one and the foundation of everything in the world, So one of its characteristics is common goods which no individual can own. Therefore it emphasis on its, social and common goods characteristics 2) As mentioned above, land is regulated by both the private law and the public law and there are several land laws which have social law characteristics 3) In the modern industrialized society land law, which realizes one of the constitutional ideals, is necessary to coodinate conflicts which are raised from both realization public interest goals such as common use for the public interest and improving public welfare and prottection of the private right. Therefore we should review laws related land from the different point of views, such as social justice and legal stability. Because we can not solve social problems which are raised by the land with the help from current land laws. We should redifine the legal concept of land and make a new basic land law which has social law characteristics. From the these kinds of point of views, this writer try to redifine the legal concept of land. The legal concept of land is defined as having common interest and harmonious use concept which coodinate both private land law and public land law rather than public interest concept which causes a lot of misunderstandings. To solve social problems related to land, which will cause conflicts private interest and pubilc interest such as 1) the ones arised from land use, between profit and sale 2) the ones caused from land trade, evaluation and taxation 3) the ones raised from land registration cadaster and land registration, we should make the basic land law modeled from Taiwan. I am sure that the basic land law will be a means to direct and correct life space use.