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.

소요동력 절감을 위한 트랙터용 로타리 커버의 개발

오종진,김기대,이현동,김찬수,김성환,나건영 충남대학교 농업과학연구소 2002 농업과학연구 Vol.29 No.2

본 연구에서는 로타리 경운작업시 흙 부착이 가장 많이 되고 소요동력에 큰 영향을 미치는 로타리 커버 내측에 흙이 부착되는 것을 방지하여 경운 소요동력의 절감에 기여할 수 있는 로타리 커버를 개발하는데 목적이 있으며, 그 구체적인 연구결과는 다음과 같다. 1. 본 연구의 수행을 위하여 트랙터의 로타리 경운소요동력을 측정하고자 트랙터 PTO축과 로타리 동력 입력축을 연결하는 PTO 동력 전달축을 이용하여 로타리 경운 소요동력 측정장치를 설계, 제작하였다. 2. 로타리에 장착한 흙부착 방지장치의 재질로는 스테인리스 스틸, 고무, PE 등을 사용하였다. 흙부착 방지장치 장착 로타리를 이용하여 로타리 경운시험을 통한 경운 소요동력을 측정한 결과 평균 일반 로타리는 52.18ps, 스테인리스 스틸재질 장착 로타리는 52.44ps, 고무재질 장착 로타리는 49.01ps, 그리고 PE재질 장착 로타리는 46.34ps의 소요동력을 나타냈다. 3. 흙부착 방지장치 장착 로타리를 이용하여 로타리 경운시험 후 부착된 흙의 양을 조사한 결과 평균 일반 로타리는 5.6㎏, 스테인리스 스틸재질 장찰 로타리는 5.7㎏, 고무재질 장착 로타리는 3.1㎏, 그리고 PE재질 장착 로타리는 2.7㎏으로 나타났다. 4. 실험결과를 토대로 유의수준 5%의 모평균 차에 의한 검정으로 분석해본 결과 스테인리스 스틸재질의 경우 흙부착 방지효과가 없는 것으로 나타났으며, 고무와 PE재질의 경우에 방지 효과가 있는 것으로 나타났다. 그 중 PE 재질이 소요동력과 흙부착 방지에 각각 11%, 52%의 감소효과가 있어 소요동력 감소 및 흙부착 방지 효과가 탁월한 것으로 나타났다. This study aims at investigating the realities of tractor rotary tilling and paving operations performed by farm families in the central part of the country, measuring the power requirement so as to find the energy-saving factors for tractor rotary tilling, and designing a device to prevent soil adherence to the inside of the rotary cover-this part is the most subject to soil adherence and affects the power requirement. As a result of rotary tilling tests using rotaries equipped with a soil adherence preventer, the power requirement values were measured to be 52.18, 52.44, 49.01 and 46.34 PS for general, stainless steel, rubber and PE rotaries, and as a results of measurement of the quantities of the sod adhered to rotaries after their tilling tests, on the average, the quantities were measured to be 5.6, 5.7, 3.1 and 2.7㎏ for general, stainless steel, rubber and PE rotaries, respectively. The PE rotary cover reduced the power requirement and soil adherence by 11 and 52%, respectively.

전위에 의한 매개 삼차곡면의 부피

현진오,안성의 濟州大學校 師範大學 科學敎育硏究所 1995 科學敎育 Vol.12 No.1

경기도 용인시(경희대학교) 주변지역의 지하수 오염현황

오종민,김홍석,진현오,윤세철 경희대학교 환경연구소 1998 環境硏究 論文集 Vol.8 No.-

Recently, the concern about groundwater pollution is increasing. And, groundwater was one of the major water resource used as drinking water by eighty percent of the world population, and its utility as industry water, agriculture water, fresh water was increasing. But, when pollution material was found in housing well, by purifying polluted water, the area of doing thorough conservation management was few. Thus, if water resource being regard as unlimited source, the right view of nature and scientific utility were essential because of the problem of its value. The purpose of this study was that investigated groundwater quality pollution condition in the part areas of Kyunggi-do Suwon Si, Yong-In Si, proposed to efficient management plan for pollution occurrence prevention and groundwater quality development by surveying groundwater pollution source. The result of the study was that the groundwater by use purpose could systematically manage water quality since development beginning, management system about groundwater development with use can established.

A Transformation in the Product of Wiener Spaces

현진오,고봉수 제주대학교 1984 논문집 Vol.17 No.-

In this paper we extend Bearman's results, rotations in the product of two Wiener spaces, and give several results which prove useful in dealing with transformations in Wiener space.

SrO·nFe₂O₃의 磁氣特性에 미치는 La₂O₃의 影響

오응철,서강수,문현욱,신용진 明知大學校 産業技術硏究所 1992 産業技術硏究所論文集 Vol.11 No.-

This paper is studies the addition effects of La₂O₃ on the magnetic properties of Sr·ferrite The calcination temperature was 1250℃ for 1hr in air, and sintering temperature has been made at the temperature of 1225℃, 1250℃, 1275℃ and 13O0℃ respectively for 0.5hr. Compositions were chosen according to the formula ?? where n was varied between 5.8∼6.1 and x was varied between 0∼3 The composition of the best value ??= 1.48MG0e was n = 6(stoichiometric composition) and x = 2 at La₂0₃ addition. This value was higher than that of ordinary isotropic strontium ferrite.

土地公示制度의 改善方向에 관한 硏究

吳顯鎭 청주대학교 사회과학연구소 1989 한국사회과학연구 Vol.8 No.-

We can divide problems involving public land notificaton macro one and micro one. 1) Problems from the micro perspective include the ones relating land register real. For example, coincidence between practical characteristics of land and that of register book should be secured and fuctions of land register administration should be changed and land registration and building registration must be written at the same register book to promote the public confidence at the registration system. We also manage land value notification system comprehensively trough streamlining land laws. and we must nuify under one system current diversifid land value notification system to solve lots problems caused by current systems. 2) From the macro perspective, we try to revise current land notification system. For example, land speculation caused a lot of social problems including antipathy between classes. So I'd like to propose so-called Basic Land Law to prevent land speculation form spreading across the country. Therefore, Basic Land Law should contain such substances as land register, real estate registration, zoning standards, and land value notification standards. Real estate registration administration should be separated from the court and another independent office should be established to emplement land administration efficiently.

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.

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.