A Coupled-Field Analysis of Galloping for Power Transmission Line

Hwan?Seong KIM,Tuong?Long NGUYEN,Gi?Sig BYUN 제어로봇시스템학회 2002 제어로봇시스템학회 국제학술대회 논문집 Vol.2002 No.10

대기오염에 미치는 공중낙하 세균의 영향

노기환,남현근 광주보건대학 1983 論文集 Vol.8 No.-

The influence of air-born microbes on air pollution, in Gwangju area was tested, from October 3, 1982 to November 2, 1982 for one month period at six different position. The results obtained are follows; 1. The number of Air-Born Microbes in rainy day at the Inside and Outside were 192.55 and 44.17 respectively. The number of Air-Born Microbes in clear day were 531.18 (Inside) and 148.33 (Outside). 2. At the Inside of terminals and underways, the average number of Air-Born Microbes were 316.7 and 577.6 respectively. The average number of Air-Born Microbes at the Outside of terminals and underways were 103.28 and 141.25 respectively. 3. The number of Air-Born Microbes at six different positions per time such as Public Bus Terminal, Deain Underway, Choong Keum Underway, Highway Line Bus Terminals (Gwangju and Chungang) and Railway Station were 678.4, 673.08, 380. 13, 154.26 and 170.93 respectively. 4. The number of Air-Born Microbes at all the positions per time at A.M. (8, 10, 12) P.M. (2, 4, 6, 8, 10) were 349.58, 372.48, 384.93, 386.1, 397.87, 404.47, 412.67, and 373.3 respectively. 5. It was investigated that there were Coccus (727.3), Bacillus (390.5) Spirillum (120.5) and others(81.2) in the Inside of Deain Underway at clear day.

파트너십에 의한 지하철 입구 공간의 쌈지공원 설계 및 시공

김승환,강현우,손용욱,박승범,남정칠,이기철,차민준 東亞大學校 建設技術硏究所 2009 硏究論文集 Vol.32 No.2

A pocket park is valued in securing green space in downtown and improving urban view in the aspect of natural and environmental values, and it signifies a lot as the center of local residents’ community and harmony as well. Since subway exits and surroundings that have high portions in taking up street space due to lack of green space in downtown aren't made full use of, valuable pocket park place. Dangni Pocket Park of subway exits is a park completed with cooperative works and partnership by students, specialists, administrative organizations, businesses and civilian organizations, etc. without support of special budget. The study site was finally chosen to the space between exit No.1 of Dangni subway station, after analyzing the surrounding circumstances, availability and accessibility of the space among the several subway station exits of Saha, Dangni, and Hadan Station in Busan Metropolitan city. For the designing process, The Citizens organization for Million Amenity Park performed the planning and project proceeding, and 19 design drafts were proposed during the class of landscape architecture in Dong-a University. Design review panel members discussed to select the best draft in practical and authentical, and the related experts reviewed and revised to present the final design plan. The construction was conducted was performed under the cooperation between the civil, authorities, and industrial organizations, among which Saha District office managed for the waste treatment and maintenance matters. The graduates of landscape architecture department of Dong-a University and related industrial enterprises supplied landscape materials and related labors, were supported by 20 members of GPM, one of clubs of Dong-a University volunteered durig the most of construction progress, completing the Pocket Park of subway exits through partnership.

高敞地域 農業用水源의 水質特性에 關한 硏究

金煥起,姜鎭錫,全鍾南 全北大學校 附設 都市및環境硏究所 1992 都市 및 環境硏究 Vol.7 No.-

This paper had study on the water quality characteristics and water quality management of water sources as agricultural water in Gochang. This study included the measurement of stream water quality, water quality of reservoir and water quality of groundwater, this investigation was tried to find out water quality standard of agricultural water into each sources. Results from water quality analysis, the water quality of stream in Gochang was measure that pH was 8.5-7.0, COD was 14.8-1.6㎎/ℓ, SS was 282.8-1.2㎎/ℓ, T-P was 2.64-0.17㎎/ℓ, T-P was 0.22-0.01㎎/ℓ, electric conductivity was 220-50㎲/㎝ and Cd, Pb, Cu was below 0.01㎎/ℓ. The water quality of reservoir in Gochang was measure that pH was 7.0-8.0, COD was 8.0-2.6㎎/ℓ, SS was 126.1-3.4㎎/ℓ, T-P was 1.13-0.456㎎/ℓ, T-P was 0.16-0.05㎎/ℓ, electric conductivity was 200-130㎲/㎝. The water quality of ground water in Gochang was measure that pH was 6.0-8.4, TS was 51.8-419.8㎎/ℓ, COD was 2.4-1.0㎎/ℓ, CO_3^- was 125.8-14.5㎎/ℓ, SO_4 was 0.46-48.3㎎/ℓ, Cl^- was 134.1-3.6㎎/ℓ, T-N was high 15㎎/ℓ Therefore, stream water and reservoir water in Gochang had adequate to agricultural water quality standard. The ground water had adequate to agricultural water quality standard in deep well and low well.

製紙廢水 슬러지의 濃縮 및 脫水特性에 關한 硏究

金煥起,朴相肅,李壯煥 全北大學校 附設 都市및環境硏究所 1992 都市 및 環境硏究 Vol.7 No.-

Paper and pulp industry are improving by development of paper and publication culture, also treatment and generated sludge in wastewater treatment have operated significant factor of development in paper industry. Therefore, this paper had study on the thickening and dewatering of sludge for the methods of the rational treatment and disposal of sludge in paper mill industry. 1. The primery sludge of wastewater treatment in paper mill are rapid to zone settling velocity, because sludge concentration are concentrated more primery sludge than seconday sludge. 2. The injected polymer to sludge of wastewater treatment in paper mill is 2.6mg. This is very similar to that quantity of injected polymer in treatment plant of paper mill wastewater. 3. Specific resistance to sludge of wastewater treatment in paper mill is 0.33×10 exp (7)sec^2/g, dewatering sludge in paper mill wastewater are good, because specific resistance of sludge in wastewater treatment plant is smaller than other sludge.

光州川의 水質汚染에 對한 硏究

金秉煥,盧基煥,柳一光 광주보건대학 1985 論文集 Vol.10 No.-

A study on the wate pollution of Kwangju stream by the relationship between physical-chemical condition and indicator planktons distribution by water quality level was examined at 6 sampling positions during the period from Mar, 25 to Jun, 25 1984. The results were as follows; 1. pH was in the range of 6.3∼7.6. 2. The mid-stream of Kwangju stream was the more severly polluted than the other sampling positions and the average range for it was 0.3∼3.9 ppm of DO, 62∼352 ppm of BOD, 5.3∼24 ppm of T-N and 2.3∼140 ppm of T-P. 3. The plankton identification in this period showed 5 genera 6 species of Cyanophycea, 11 genera 15 species of Bacillariophyceae, 9 genera 16 species of Chlorophyceae and 6 genera 7 species of protozoa: total 31 genera 44 species. 4. In biological water analysis, upper stream(sp. 1) showed from Oligosaprobic to β-mesosaprobic but the stream in the mid-town area polysaprobic. 5. In the mid-stream (BOD 62~352 ppm) dominant species were appeared Oscillatoria tennis of Cyanophyceae and Paramecium caudatum and Euglena sp. of Protozoa. 6. We would like to propose establishing sewage plants near to the upper-stream and the down-stream of Kwangju stream.

GIS와 RS를 이용한 생태지도 작성기법에 관한 기초연구

이기철,이원화,윤해순,남춘희,김구연,김승환,서상현 한국지리정보학회 2004 한국지리정보학회지 Vol.7 No.3

본 연구는 낙동강 하구 일대의 생태계 변화와 생태 관련자료를 GIS DB로 구축하고 생태지도를 작성하였다. 생태지도 작성을 위해 1984년 11월 21일, 1997년 5월 17일에 촬영된 공간해상도 30m의 Landsat TM 위성영상과 국립지리원에서 발행된 1:25,000 수치지형도, 부산시에서 조사한 생물현황 자료를 바탕으로 DB를 구축하였다. 생태지도를 작성하기 위해, 첫째, 낙동강 하구 생태계 조사 보고서와 현재까지 진행된 생태지도에 대한 문헌 연구, 둘째, 시계열적 토지피복분류도 제작, 셋째, 동·식물상, 수질 등 생태계 항목별 BB 구축과 3단계 방식에 의한 생태계 평가, 최종적으로는 이러한 분석 결과를 바탕으로 생태계 관리를 위한 생태지도를 작성하였다. This study developed an ecological mapping technique with GIS database using the analyses of existing ecological survey reports and the change detection on the Nakdong river estuary. The data which are used to establish GIS DB include 2 Landsat TM images on Nov. 31, 1984 and May 17, 1997, 1:25, 000 topographical maps established by National Geography Institution and various ecological survey reports published by Busan metropolitan city government. The details for producing ecological map are as follows. At first, the current methods of ecomapping efforts and previous ecological surveys of Nakdong river estuary were carefully examined. Secondly, the land cover maps were created from the classified Landsat images of 1984 and 1997 for the spatiotemporal ecosystem analysis. Thirdly, the ecosystem was evaluated by using GIS ecological database based on the criteria of botany, zoology and water quality etc. Each criteria was reclassified into 3 stages which describe the overall quality of ecological condition. At last, the comprehensive ecological map was suggested as a prototype of ecosystem assesment and management tool with the discussion of further study. The findings of this study would be a milestone for preserving and managing the ecosystem.

蒸發濃縮法을 利用한 酒精廢水의 最適處理에 關한 硏究

金煥基,鄭正朝,金成圭 全北大學校 附設 都市및環境硏究所 1996 都市 및 環境硏究 Vol.11 No.1

This study was carried out as a part of total solid recovery and energy economy in distillate wastewater, in which was investigated the characteristics of treatment with the variation of temperature, thickened concentration and residence of wastewater of Rise, Barley and Tapioca, Tapioca, and sweet potato by using Vacuum Vapor Compression. The results are as follows; 1. In case of Rise wastewater, 10 ㎥/hr of planned treatment flow can be treated under the range of 0.9979∼1.0491 g/c㎥ of thickened concentration and 50∼70 % of enriching liquid, and the both of organic fixation and scale sticking in heat transfer tube is out of the question. Further, it is considered that it is possible to treat the total flow for generated wastewater reaching up to 1.5 times of productivity when chemical scrubbing using NaOH is utilized with the situation of treatment periodically. 2. In Tapioca Wastewater, all the generated wastewater can be treated, and on operating of Tapioca-experiment, it is shown as a question that fibrous materials of Tapioca gunny bag and remained particles of PP gunny bag sticked on heat transfer tube reduce the thermal conductivity. 3. In treating Rise and Tapioca (50 and 50), 10 ㎥/hr of planned treatment flow can be treated under the 0.860∼0.878 g/c㎥ of thickened concentration and 60∼75% of enriching liquid. Its efficiency of treatment, however, is inferior to the both of Rise and Tapioca wastewater. 4. In case of Barley wastewater, the planned treatment flow can be treated under the 0.810∼0.873 g/c㎥. Organic fixations of heat transfer tube is made progress faster than the both of Rise and Tapioca Wastewater, and enriching liquid is generated more 1.5 times than other wastewater, thus, in treating Barley wastewater, it is possible to treat total flow by installing the drying equipment larger 1.5 times than other treatment equipment. 5. Sweet potato wastewater is not suitable for treatment of V.V.C. because of the difficulty of vaporization by its high viscosity. In blending with other distillate wastewater, however, it can be treated.

도로주변 낙하분진의 침착속도와 수계환경에 미치는 영향

김환기,송호면,김형훈 全北大學校 附設 都市및環境硏究所 1997 都市 및 環境硏究 Vol.12 No.1

The air pollutants were transported over the long distant by the wind and were deposited to the ground or water surface by the gravitational sedimentation, precipitaion or Brown movement and so on. In this case, the deposited particles might give a bad effect to the water environment, such as eutrophication, damage of aquatic organism. This study was carried out to compare the deposition flux to the 17th national road and Il-San lake, Kyunggi, and to investigate the principal organic components. The deposition flux of 17th national road was 228.2㎎/㎡ day from Feb. to June., and that of Il-San lake was 276.4㎎/㎡ day from Feb., to June. Each components exist in the ratio of COD : T-N : T-P = 100 : 10.8 : 0.9, and the ratio of COD to the VSS is 1.2. The ratio of VSS to TSS was 0.12, the ratio of NH_3-N to T-N was 0.48 and the ratio of PO_4-P to T-P was 0.25. The average deposition velocity was 4.2㎝/s in 17th national road and 4.9 ㎝/s in the Il-San lake. The minimum velocity site was forest at the rate of 1.0㎝/s.

活性炭을 Media로한 生物學的 流動層의 合成廢水 處理에 關한 硏究

金煥起,朴相肅,최두병 全北大學校 附設 都市및環境硏究所 1994 都市 및 環境硏究 Vol.9 No.1

This paper was performed for characteristics of BOD removal, DO uptake and effluent water of SS by the BFB filled with activated carbon. 1) According to the experimental results, hydraulic retention time was 42 minutes, 3.42㎏-BOD/㎥·day of BOD volume loading rate, almost 85percent of organic removal characteristic, almost 40 percent upper of DO uptake rate, below 15㎎/ℓ of SS concentration rate of effluent water. 2) If media concentration was more than 257 ㎏/㎥, 30 percent of reactor, normal treatment rate was not anticipated. 3) As recirculation velocity was 0.57 ㎝/sec, the best optimum organic removal rate was 88.6 percent. 4) In the view of DO uptake, media concentration was 171㎏/㎥ and uptake rate was 56.4 percent in recirculation velocity 0.42 ㎝/sec. 5) The effluent SS concentration was below 15 ㎎/ℓ. 6) As characteristic of organic removal and DO uptake, the optimum treatment rates were recirculation velocity of 0.42 ∼ 0.66 ㎝/sec and media concentration of 222 ∼ 257 ㎏/㎥.