Floristic characteristics of vascular plants and first distributional report of Pseudostellaria baekdusanensis M. Kim in Yongneup wetland protected area

Young-Chul Kim,Hyun-Hee Chae,Sang-Heock Oh,Seung-Ho Choi2,Moon-Pyo Hong3,Gi-Heum Nam,Jae-Yoon Choi,Hyun-Sook Choi,Kyu-Song Lee 한국환경생태학회 2015 한국환경생태학회지 Vol.29 No.2

Yongneup wetland protected area, the only high moor in Korea, is a core area to conserve biodiversity. Even though the Yongneup wetland protected area is relatively small, various plant species are distributed in the Yongneup wetland protected area because it includes various habitats showing different environmental gradients. Vascular plants distributed in the Yongneup wetland protected area were identified as a total of 376 taxa that is composed of 73 families, 217 genera, 322 species, 3 subspecies, 44 varieties and 7 forms. For endangered plants designated by the Ministry of Environment, 5 species including Trientalis europaea var. arctica, Lilium dauricum, Halenia corniculata, Lychnis wilfordii and Menyanthes trifoliata were found and 34 taxa were confirmed to be distributed only in the mountainous wetland habitats. Regarding naturalized plants, a total of 11 taxa were distributed, but most of them were distributed in the areas where artificial interference has occurred. And in areas inside the wetlands that are relatively well preserved, 2 species of Bidens frondosa and Erigeron annuus were observed. In this study, the occurrence and distribution of Pseudostellaria baekdusanensis M. Kim, which was recently found in Mt. Baekdu and reported as a new species, were identified in the Yongneup wetland protected area. A wetland is a very vulnerable area to drastic environmental changes and damages to its ecosystem could cause the extinction of rare plant species which are distributed only in the wetlands. Therefore, it is mandatory that current status of the Yongneup wetland protected area is evaluated and actions to prevent rapid environmental changes are taken. Fourteen separate investigations were conducted in 2013 and another four in 2014, to evaluate current status of the Yongneup wetland protected area. These investigations have provided us the basic information for future actions of conservation and restoration.

두개인두종의 임상양상 및 수술적 치료성적 : 102례의 분석 Analysis of 102 Cases

백선하,오창완,정영섭,양희진,한대희,조병규,왕규창,정희원,김현집,최길수 대한신경외과학회 1997 Journal of Korean neurosurgical society Vol.26 No.7

물-메탄올 혼합용매에서 Ni(Ⅱ) 이온과 N₂O₂계 거대고리 리간드와의 착물형성에 관한 연구

최규성,허영애,차분희 慶南大學校 附設 基礎科學硏究所 1995 硏究論文集 Vol.7 No.-

The protonation constants for the macrocyclic ligands containing nitrogen and oxygen donors such as 3,4;9,10-dibenzo-1,12-diaza-5,8-dioxacyclo-pentadecane(NtnOenH₄), 3,4;10,11-dibenzo-1,13-diaza-5,9-dioxacyclohexadecane (NtnOtnH₄), and stability constants of Ni(Ⅱ) complexes have been determined at the various composition of methanol-water mixtures by potentiometric titration at 25℃. From the results: 1. The order of protonation constants of ligands in methanol-water mixed solvents is 95% MeOH< 20% MeOH< 60% MeOH< 35%MeOH. 2. The order of protonation constants and stability constants is NtnOenH₄< NtnOtnH₄.

工兵 學校 環境敎育 時間에 대한 實態 分析

최명규,송창수,양회진,김창환 호남대학교 산업기술연구소 1999 산업기술연구논문집 Vol.7 No.-

본 연구는 군 환경 교육의 근간이 되고 있는 육군공병학교를 대상으로 군 환경교육의 실태를 조사, 분석하여 문제점을 도출하고 그 개선방안을 제시함으로써 효율적이고 실질적인 환경교육이 이루어질 수 있도록 하고, 나아가 군의 환경관리 능력을 제고시키는데 연구의 목적을 두었으며, 공병학교에서 교육중인 군인들을 조사대상으로 삼아 설문조사를 실시하여 분석해 본 결과는 다음과 같다. 1. 군 환경 교육의 필요성에 대해서는 95%의 응답자가 필요하다고 응답하여 군 환경 교육의 필요성에 대하여 공감하고 있는 것으로 나타났으며, 군에서의 환경교육은 사회와는 다른 교육이 되어야 한다고 느끼고 있다. 2. 군에서 실시되고 있는 환경교육에 대해서는 불만족도가 높은 것으로 나타나 군의 환경교육 방법과 방향에 있어서는 많은 개선이 필요한 것으로 나타났다. 3. 응답자의 절반 이상이 군 생활 중 4시간 이상 환경교육을 받는 것으로 나타난 반면 그 내용과 질에 있어서는 사회의 환경교육과 비교하여 불만족하고 있는 것으로 나타나 보다 폭 넓은 분야에 대한 환경교육이 이루어져야 할 것으로 판단되었다. 군 환경교육의 최적시간에 대한 설문에서는 장교 과정은 고군반은 현재의 8시간이, 초군반은 현재의 12시간보다는 4일 이상이, 그리고 특기병 과정은 2주일 이상이 적당할 것으로 나타났다. The purpose of this study was to research on the actual condition of the environmental education in Army Engineer's School. The major findings of this study were as follows; 1. 95% of soldiers answered "positive", that the environmental education is needed in the Army. And they also wanted there must be some differences between Army and Civilian in the environmental education. 2. Soldiers who are highly educated officers were more "dissatisfacted" with the environmental education in the Army than private. So improvement must be made in the Army environment education both the way direction and education. 3. The soldiers have not learned environmental education of half of responsers, most of them are dissatifacted with both contents and quality of the environmental education.

달성 도동서원의 경관보존관리방안

최종희, 김규연 배재대학교 자연과학연구소 2014 自然科學論文集 Vol.25 No.1

본 연구는 달성 도동서원의 보호구역 설정 및 이에 따른 경관보존관리방안 마련을 위한 연구로서 집약된 결론은 다음과 같다. 첫째, 보존권역 설정의 경우, 주산인 대니산과 안산인 제석산, 명당수인 낙동강을 기점으로 성리학적 자연관에 입각한 서원의 입지, 김굉필 묘소 등 배향인물과 관련된 문화적 요소, 수월루를 경관조망점으로 하는 경관가시권역, 토지용도, 지적사항 등을 고려한 체계적인 보호권역 설정의 타당성을 제시하였다. 둘째, 조망경관확보의 경우 초근경과 근경의 경우 서원 전면의 주차장과 도로가 조망경관 저해 요소로 작용하여 향후 원형경관을 회복하기 위해서는 수월루의 전면에 위치한 안산과 명당수로의 조망이 확보되어야 함을 파악할 수 있었다. 셋째, 식생경관 회복의 경우, 현재 경내를 중심으로 공간성격에 부합하지 않는 수종이 식재되어 있는 바, 식재수종과 위치 및 재식방법에 대해 문헌적 고증을 통한 복원 및 정비가 이루어져야함을 파악할 수 있었다. 넷째, 시설물의 경우 재료와 형태의 혼재 및 동선체계와 연계 없이 설치되어 있고, 안전시설의 경우 노후화되고 파손된 시설이 그대로 외부로 노출되어 적절한 정비가 요구 되는 바, 향후 서원의 경내 및 외부공간의 공공시설물의 디자인 지침 마련의 필요성을 파악할 수 있었다.

Ti-Ni-Cu 납을 이용한 티타늄 납접부의 인장 및 피로강도

최규형,원대희,배태성,大川昭治,亘理文夫 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4

This study was performed to evaluate the tensile and fatigue strength of butt joints in titanium soldered with Ti-Ni-Cu alloy. Titanium rods of 30 mm in length and 3 mm in diameter were divided into two groups and the soldering surfaces were polished with #240 and #2,000 emery paper, respectively. Tow pieces of titanium rods were butt-soldered with Ti-Cu-Ni alloy using the electric resistance heating under flux-argon atmosphere, the infrared heating under argon atmosphere, and the infrared heating under vacuum-argon substitution atmosphere. Tensile test was done with a crosshead speed of 0.5㎜/min using universal testing machine and fatigue test was performed by a cyclic tensile stress of 30 Hz using tension-type fatigue testing machine. The solder-matrix interface regions were etched by the solution of 20HF-20HNO_3-60glycerin and analyzed by EPMA. The fracture surfaces were examined by SEM. The maximum tensile strength value of 391.0±19.9 MP_a was obtained when the titanium surfaces were polished with #2,000 emery paper and soldered with Ti-Ni-Cu alloy using the infrared heating under vacuum-argon substitution atmosphere. Fatigue strength value of 215.8 MPa was obtained when soldered using the infrared heating under vaccum-argon substitution atmosphere. Characteristic striation and dimple regions were observed in the fractured surfaces. The EPMA data for the solder-matrix interface region revealed that the diffusion of Ni and Cu occurred in the titanium matirx.

금강유역 수질오염 실태조사

최신석,오희목,강명규,조통래,이규승,유종국,이영하 忠南大學校 環境問題硏究所 1988 環境硏究 Vol.6 No.1

조사 구역 상류 지점의 평균 수질은 pH가 7.1, DO가 8.3mg/ℓ, BOD가 1.7mg/ℓ, COD가 1.7mg/ℓ, SS가 15.4mg/ℓ, 분변성 대장균이 1.1x10³ MPN/100ml고 상수원 수 1급 내지 2급의 양호한 상태이고 하류지점의 수질은 pH가 6.8, DO가 7.7mg/ℓ, BOD가 2.2mg/ℓ, COD가 2.4mg/ℓ, 분변성 대장균이 1.7x10³MPN/100ml로 상수원 수 2급 내지 3급의 상태를 나타내 하류로 내려가면서 오염도가 증가하는 것으로 나타났다. 청주시의 영향을 크게 받는 미호천 하류의 평균수질은 pH가 7.2, DO가 6.3mg/ℓ, BOD가 16.2mg/ℓ, COD가 15.1mg/ℓ, 분변성 대장균이 1.6x10??MPN/100ml로 심각한 오염 상태를 보여 청주시와 대전시가 금강 본류의 주 수질 오염원으로 나타났다. 영양 염류 (NH₃-N, NO₂-N, NO₃-N, PO₄-P)와 무기성 유해 성분 (Cl-, CN-, F-)의 함량은 지천의 일부 지점을 제외하고는 극히 낮은 수준으로 검출되었으며, 유기인, 페놀류, PCB 성분은 조사기간 중 전혀 검출되지 않았다. 또한 Fe, Zn, Cu, Mn, Cr, Pb, Cd, Hg등의 중금속은 검출되지 않거나 하천 수질 기준 또는 식용수 수질 기준의 허용치를 초과하지 않는 양호한 수준으로 나타났다.

光彈性 및 有限要素法에 依한 Dove-tail Notoh의 應力集中에 關한 硏究

崔圭夏,趙熙燦,安台煥 충주대학교 1990 한국교통대학교 논문집 Vol.24 No.-

When a load is put on the parts of the rapidly changing section area like in notch, fillet, keyway, screwthread etc, there may occur some stress concentration, crack and fracture in the structures of machines, buildings, bridges, ships, aircrafts, industrial plant machines, atomic power plant machines and the machines for civil engineering architecture or agriculture. Many researchers such as Neuber, Frocht, Vicentini, Flynn etc. have tried to find out the cause of fracture by photoelastic experiments. When Tuner settled the aircraft structure analysis by finite element method in 1956. Agyris, Ritz, C.A. Felippa, J.T. Oden, Zienkiewicz etc. extended the finite element method to wide applicaton to hydrodynamics, electric field, thermal transmission, underground water, soil, atomic technology, the ground, biotechnics, and even to the stress concentration problem which is one of the machine design field. There are some struchural analysis methods of the strength of materials, photelastic and the finite element method. They have the same object for design of strength and stiffness, but each method and priciple is very different. In this paper I studied the stress concentration and the stress distribution on dove-tail notch by photoelastic and finite element method and tried to show the relasation of stress concentration.

월 PMP 개념의 적용에 관한 연구

최한규,김남원,최용묵,윤희섭 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.B

Normally at a flood season the operation of the dam depends on a short range weather forecast that makes many difficulties of the management at a dry season. It is needed to study the pattern of the long period rainfall. The concept of PMP(Probable Maximum Precipitation) was used for designing dam. From the concept, this study is applied the concept of monthly probable maximum precipitation for operating dam. It can be possible to let us know the appropriateness of a limiting water level at a rainy season. For the operation of dam at a dry season this study can predict roughly the flood season's pattern of precipitation by month or period, therfore the prediction of precipitation can rise efficient operation of a dam.

주문식업체에 따른 연계자격증 개발연구

최계호,정두진,이규희,박영순 대구산업정보대학 2001 논문집 Vol.15 No.-

This paper investigates the educational problems of junior college education linking industries and try to find the method for overcoming the limitations. Therefore, developing the related certificates upon ordering by industries will be a optimum option. Up to date, junior college education under educational-industrial cooperation is not distinguished curriculum from general vocational institute. This phenomenon incurred problems and limitations in developing human resources management fitting ordering education by industries. This study suggests 8 stages for the development of related certificates and provides model certificates which will apply every department. The best policy for a efficient human resources management toward junior college by educational-industrial cooperation will be opening special programs which will help students acquiring certificates.