지하역사 승강장 및 대합실 평상시/비상시 급ㆍ배기 환기 Large Eddy Simulation

장용준(Yong-Jun Jang),류지민(Ji-Min Ryu),박덕신(Duck-Shin Park) 한국전산유체공학회 2013 한국전산유체공학회지 Vol.18 No.3

The turbulent flow behavior of air supply and exhaustion in the Shin-gum-ho subway station is analyzed for ordinary and emergency state. The depth of Shin-gum-ho station is 43.6m which consists of the island-type platform(8th floor in underground) and a two-story lobby (first & second floor in underground). An emergency stairway connects between the platform and the lobby. Ventilation operation mode for ordinary state is set up as a combination of air supply and exhaustion in the lobby and platform, while for emergency state it is set up as a full air supply in the lobby and a full exhaustion in the platform. The entire station is covered for simulation. The ventilation diffusers are modeled as 95 square shapes of 0.6m?0.6m in the lobby and as 222 square shapes of 0.6m×0.6m and 4 rectangular shapes of 1.2m×0.8m in the platform. The total of 7.5million grids are generated and whole domain is divided to 22 blocks for MPI efficiency of calculation. Large eddy simulation(LES) is applied to solve the momentum equation and Smagorinsky model(C<SUB>s</SUB>=0.2) is used as SGS subgrid scale) model. The time-averaged velocity fields are compared to experimental data and show a good agreement with it.

충남 아산시 소재 도고천과 그 주변부의 식물상

신현철,조수현,최덕호 순천향대학교 기초과학연구소 1997 순천향자연과학연구 논문집 Vol.3 No.2

To understand the floral characteristics of Dogo river and its vicinity, the plants distributed along Dogo river were collected at 10 sites from July to October, 1997. From this investigation, it is confirmed that 113 taxa, including 15 naturalized taxa, were distributed at Dogo river and its vicinity. Among them, 12 taxa were hydrophytes, 25 taxa were wetplant and 76 taxa were waterside plants. The plants of four taxa, including Commelina communis, Humulus japonicus, Persicaria thunbergii, and Bidens frondosa, were distributed at 8 sites, and those of 57 taxa were distributed only at one site.

개에서 지알디아증의 치료 1례

신에스더,박희서,이시예,송우리,김명철,김덕환,송근호 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

A 3-month-old, 3.85kg female Jin-do dog with chief complaint of bloody diarrhea and depression was referred to the Veterinary Teaching Hospital, Chungnam National University. In fecal examination, trophozoites of giardia were observed and It was diagnosed as canine giardiasis. For treatment, metronidazole was administered orally for 5 days at a dose of 22mg/kg q12h. Diarrhea was not observed on 3 days after medication and most of clinical signs were disappeared on 7 days after medication with metronidazole. General conditions and activitivities became good on 13 days after medication. In addition, cysts or trophozoites of giardia were not detected any more in fecal examination using floating method with zinc sulphate solution. The present patient was a case of canine giardiasis that showed favorable response to metronidazole.

녹차 건분이 고지방식이 급여에 의한 흰쥐의 지질 농도에 미치는 영향

신미경,김덕희,한성희 한국식생활문화학회 2003 韓國食生活文化學會誌 Vol.18 No.3

The effects of dried green tea leaf powders on serum lipid concentrations were evaluated in rats. Sixty male Sprague-Dawley rats weighing 100±10g were divided into six groups and fed high fat diets for six weeks. Experimental groups were administered with following diets: Normal fat diet and normal and high fat diets with 1% dried green tea leaf powders. Tissue weights of live, lung, stomach, heart, kidney and spleen of high fat diet exposed rats were reduced by dried green tea leaf powders groups. The concentrations of serum triglyceride in rats fed the dried green tea leaf powers were lower than those in other groups. The concentrations of total cholesterol in green tea leaf powders the were lower powders green tea were significantly higher than those of other groups. The levels of LDL-cholesterol in serum of the dried green tea leaf powders groups were tended to be lower than those of other groups. GPT and GPT were decreased in dried green tea leaf powders groups and than in the high fat groups. LDHase was lower in the dried green tea leaf powders groups than in the high fat group. These results suggest that dried leaf powders green tea groups may reduce elevated levels of serum lipid concentrations in rats fed high fat diets.

은행의 금리 리스크 관리 : 국내 J은행 사례를 중심으로 Case of a Domestic Bank

신덕순 대진대학교 국제통상연구소 1999 國際通商論叢 Vol.1 No.1

숫돌 형상 변화에 따른 연삭가공면 특성

왕덕현,김원일,강신엽,우정윤 경남대학교 신소재연구소 1997 論文集 Vol.9 No.-

숫돌 형상 변화에 따른 연삭가공시 나타나는 온도의 변화를 연삭가공면의 특성으로 파악하는 실험적 연구를 하였다. 숫돌의 형상은 슬롯형태로 폭과 각도의 변화에 의하여 변경시켰으며, 또한 일반숫돌인 경우 특성을 비교 분석하였다. 슬롯형 숫돌인 경우 슬롯의 폭이 10mm이고, 각도가 30°때 낮은 연삭온도를 나타내고 있었다. 표면거칠기 상태는 일반숫돌인 경우보다 슬롯형 숫돌일 경우 대체로 표면상태가 나쁘다는 것을 알았으며, 슬롯의 폭이 6mm이고 각도가 45°인 숫돌과 일반숫돌의 특성을 비교해 볼 때 유사한 경향을 나타내고 있었다. The characteristics of ground surface by different shapes of wheel were found by grinding temperature and surface roughness. The shapes of wheel are changed by slots, which has different width and helical angle, and compared with the case of general one. Lower grinding temperature was obtained for 30°helical angle and width of 10mm. The characteristics of surface roughness of slotted wheels were found to be rough, but the value of roughness for the slotted wheel with 45°helical angel and width of 6mm was similar tendency for the general wheel.

유기산 추출에 의한 철 폐광산 오염토양의 복원

정의덕,강신원,백우현 한국환경과학회 2000 한국환경과학회지 Vol.9 No.1

A study on the remediation of heavily Fe ion contaminated soils from abandoned iron mine was carried out, using ex-situ extraction process. Also, oxalic acid as a complex agent was evaluated as a function of concentration, reaction time and mixing ratio of washing agent in order to evaluate Fe removability of the soil contaminated from the abandoned iron mine. Oxalic acid showed a better extraction performance than 0.1N-HCI, i.e., the concentrations of Fe ion extracted from the abandoned mine for the former at uncontrolled pH and the latter were 1,750 ppm and 1,079 ppm, respectively. The optimum washing condition of oxalic acid was in the ratio of 1:5 and 1:10 between soil and acid solution during 1 hr reaction. The total concentrations of Fe ion by oxalic acid and EDTA at three repeated extraction, were 4,554 ppm and 864 ppm, respectively. The recovery of Fe ions from washing solution was achieved, forming hydroxide precipitation and metal sulfide under excess of calcium hydroxide and sodium sulfide. In addition, the amounted of sodium sulfide and calcium hydroxide for the optimal recovery of Fe were 15g/ℓ and 5g/ℓ from the oxalic acid complexes, respectively.

수원시에 대한 4가지 대기분산모델의 상대적 평가연구

박덕신,황인조,김동술 경희대학교 환경연구소 1998 環境硏究 論文集 Vol.8 No.-

Predictions by four atmospheric dispersion models such as TCM, ISCLT, Valley, and TEM were relatively compared in the Suwon City. Each dispersion model was seasonally modified with hourly TSP, SO_(2), NO_(2), and CO ground-level concentration data observed at two telemetered air monitoring sites operated by the Ministry of Environment. Prediction by each model was performed with the same input data prepared by intensive investigation of meteorological data as well as point, area, and line emission inventories in the target area. To present the paired comparison of each model, relative errors among four different models were calculated with reference statistics which were based on the predicted arithmetic means at a number of 48 different sites for each model. Since the main objective in this study was in the relative differences between models, it is impossible to quantitatively determine rank order for models. However, the results by four models show that the maximum relative errors in TSP, SO_(2), NO_(2), and CO concentration were 97.1%, 92.5%, 118.4%, and 49.7%, respectively.

Cetyl Alchol을 利用한 坐制基劑에 關한 硏究

陳甲德,金英姬,李壽根,白琇鉉,李神雄 嶺南大學校 環境問題硏究所 1986 環境硏究 Vol.6 No.1

Some basic propeties of suppository bases containing cetyl alcohol(C), lanoline(L), and propylene glycol(P) were investigated in this study. The results were as follows. 1. Suppository could be molded easily in the higher amount of cetyl alcohol than that of lanoline or propylene glycol. 2. Suppository was molded by 28 kinds of different C:L:P ration could be soften in rectum temperature and the proper ratios of C:L:P to release sodium salicylate from suppository were 5:3:1, 3:1:2, 4:3:1, 5:3:2. 3. The softening times of suppository with these ratios of C:L:P were 9 min to 20 min. 4. Softening temperature and time were not changed after storage for 1, 11, 38, 54 days at 20℃ or 4℃ 5. The most appropriate ratio of this base was 5:3:1 in sodium salicylate suppository.

급성 양성가속도가 흰쥐의 위산분비와 혈장 가스트린 농도에 미치는 영향

윤신희,이덕주,이인기 공군본부 의무감실 1991 항공의학 Vol.39 No.1-2