常溫에서 豚·人糞 混合廢棄物의 嫌氣性處理(綜合編)

김남천,민달기,이형춘 서울保健大學 1989 論文集 Vol.9 No.1

Pig was mixed with the same quantity of human night soil and was anaerobically digested at 25℃. 1. The gas production was 0.21~0.36㎥/㎏ VS Fed/day and the gas had a methane content of 43∼64%. 2. The maximum gas production was 0.39㎥/㎏ VS Fed/day and the methane gas production was estimated at 0.29㎥ CH_(4)/㎏ VS Fed/day. 3. The percentage removals in COD, BOD, TS and volatile solid (VS) were 13∼35.3%, 20.8∼58.5%, 14.8∼40% and 36∼49% respectively and were increased with increase of hydraulic retention time (HRT). 4. When the HRT was increased from l0day to 40day, the gas production was increased by 1.7 times and the methane gas production was increased by 2.6times. 5. The refractory fraction on inlet VS was 37.5% and substrate removal rate constant (K) was estimated at 0.107/day. 6. The specific resistance of sludge was 3.23 x 10^(10) ∼ 7.58 x 10^(10) sec²/g and dewatering depended on HRT.

활성오니법에 의한 전기부속품 공장 폐수처리에 관한 연구

김남천,채수권 서울보건대학 1996 서울보건대학 부설 한국보건과학연구소 논문집 Vol.3 No.1

In order to treat wastewater from a factory manufactured electrical accessories. sludge returned CMAS reactors of MLSS 2000mg/l were operated with various HRTs of 5.40hrs. 7. 89hrs, 15.6hrs, and 30.8hrs at a temperature of 20℃. The results showed that it was difficult to get 80% of TCOD removal even with longest HRT(30.80hrs) while more than 80% removal of TBOD was achieved with 7.89hrs of HRT. To remove 80% of BOD and 70% of COD, F 1M ratio was reqiured to maintain 0.17kg BOD/kg MLSS. day, even in this case, the removal rates between TBOD and SBOD were significantly different. The calculated substrate removal rate(Km) was 1.26/hr, and the calculated cell conversion rate of organic matters(S/TE) was 0.26 on the base of BOD. Estimated cell yield coefficient (Y), cell synthesis coefficient(ke). and endogenous respiration coefficient(ke) were 0.242, 0.31/hr, and 0.02/hr. respectively. The effluent concentration of TBOD. SBOD, MLVSS in aeration reactor, and oxygen uptake rate(dO/dt) were ranged 9.1∼25.4mg/l. 4.9∼11.9mg/l, 1,375∼1,983mg/l. and 5.4∼30.19mg O_(2)/·hr, respectively. These observed values are agreed relatively well with calculated values. The sludge production rates per HRT were ranged 0.443∼1.28g SS/day, and the sludge production rate per BOD removal were ranged 1.635∼2.717g SS/g BOD_(rem). These values are close to the calculated ones. The best sludge dewatering rate was achieved with 15.60hrs of HRT and its specific resistance(α) was 2.68×10^(11)sec/g.

수송기계용 복합재 원형튜브의 에너지흡수특성

김영남,황재중,차천석,심재기,양인영 朝鮮大學校 機械技術硏究所 2002 機械技術硏究 Vol.5 No.1

본 연구에서는 일 방향 CFRP 복합재 튜브에서 나타나는 상이한 압궤특성의 일관성을 보이고자 하며, 또한 계면수가 에너지 흡수능력의 함수인지 아닌지를 결정하고자 한다. 계면수는 최외층각도 0?를 갖는 4가지 형태(계면수는 2, 3, 6, 7 개)이며, 각 튜브에 압궤하중이 가해졌을 때 그 응답은 압궤과정을 제어하는 상이한 메카니즘 사이에서의 상호작용에 의존하고 그것을 매우 복잡하다. 따라서 본 연구에서는 정적 및 충격압궤실험을 행하고, 그 결과 계면함수, g(k)에 대해 정의하였다. 또한 일반적으로 [0/90〕_(2s) 적층된 CFRP 튜브가 더 높은 에너지를 흡수하였으며, 이론적 및 실험적 데이터는 서로 일치하였다. The objective of this paper is to present a consistent description of the different collapse characteristics exhibited by uni-directional CFRP(Carbon Fiber Reinforced Plastics) composite tubes and determine whether the energy-absorption capability of these tubes is a function interlaminar number. Tube interlaminar number was 4 types (2, 3, 6 and 7) included ply orientation angle of outer was 0. When such tubes are subjected to crushing loads, the response is complex and depends on the interaction between the different mechanisms that control the crushing process. In this study static and impact collapse test were performed and the results have been shown as a function interlaminar number(g(k)). In general, the stacking sequence [0/90〕_(2s) CFRP tubes absorbed more energy than other tubes, theoretical and experimental data were to be likely each other.

동물성 잔재물 재활용 공장의 폐수처리에 관한 연구

김남천 서울保健大學 1995 論文集 Vol.15 No.1

The wastewater from animal offals was treated by the method of activated sludge at 20℃ water temperature. The results are epitomized as follows ; 1. To achieve respectively 80% removal rate of COD and 93% removal rate of BOD in influent, in which concentration ranges of COD and BOD were 949.9~1011.1mg/L, 610.0~627.0 respectively, F/M ratio should be maintained below 0.67g BOD/MLSS/day, and HRT should be operated above 9.66hours. In case of this operation, COD and BOD in effluent were 197.7 mg/L and 46.2mg/L respectively. 2. Metabolism factor of organics(km) was 2.66/hr, and synthesis/total energy ratio was 0.212 in COD basis, 0.108 in BOD basis respectively. Furthermore, cell yield coefficient(Y) was 114, and cell synthesis factor(Ks) was 0.302/hr. 3. On the condition that HRT were 9.66hrs, 14.68hrs, and 27.75hrs, rates of oxygen uptake in endogenous respiration state were 22.2mg O_(2)/L-hr, 18.2mg O_(2)/L-hr, and 12.4mg O_(2)/L-hr respectively. And, the range of do/dt was 0.047-0.069mg O_(2)/mg MLVSS/hr. 4. As the result of specific resistance experiment of sludge, on the condition that HRT was operated in 9.66hrs, the dewatering efficiency(α=8.04×10^(11)sec^(2)/g) was higher than any other cases.

酸性降雨에 의한 畓土讓內 金屬物質의 浸出 및 吸着能에 關한 硏究(Ⅰ)

김남천,우세홍,채수권,권우택,유영식 서울保健大學 1992 論文集 Vol.12 No.1

Leaching characteristics and adsorption ability of Fe and Mn in the paddy soil were studied with synthetic acid rain. 1. Leaching quantity of Fe from the paddy soil by acid rain was 8 times as much as by neutral rain, and 6 times for Mn. 2. Leaching quantity was changed with heat treatment methods of sample soil (ignition or air drying), with kind of meta](Fe or Mn) and with acidity of soil (acid or netural). 3. The adsorption ability of Fe on the paddy soil was twice as much as, that of Mn. 4. Langmuir isotherm equation was c/q=20C+10 for Fe(air drying paddy soil) and c/q=160 C - 610 for Mn(ignation paddy soil). 5. Contineous column experiment showed that the adsorption ability of Mn was above 100, and for Fe, it was changed with kinds of sample soil and pouring methods.

뇌졸중 환자의 경직 감소를 위한 경피적 전기 신경 자극술과 침술의 효과

백천호,소성욱,김희상,안경회,남상수,박선구 大韓再活醫學會 1997 Annals of Rehabilitation Medicine Vol.21 No.6

Ⅲ형 침전의 특성에 대한 실험적 고찰

김남천,민달기 서울保健大學 1988 論文集 Vol.8 No.1

국민 여가활동기회의 효율적인 분배와 생산유인 효과 확대를 위한 스포츠시설 및 스포츠 관련 산업의 관광자원화 방안을 위한 연구

남덕현,김천중,이주형 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.1

The purpose of this study is to examine the recognition and satisfaction of sport tourism as an area of tourism industry, and show the actual status of sport tourism, suggest the strategies to develop sport tourism goods according to sports tourism resources. This study is based on the survey of residents, physical education teachers, tour industry managers and local government employees, who were asked about what impact sports tourism had on local societies and environments. The data obtained from the returned questionnaire were coded and transcribed for a statistical analysis. collected data were analyzed though SPSS 10.0using such statical methods as a descriptive statistical analysis, chi square test, ANOVA test. With the twenty first century upcoming, sport tourism is recognized as a necessity of life for every person in the world. In addition, the rapid changes of social phenamenons such as the changing of a basic sense of value and life style. the improvement of income, the development of traffic systems, communication facilties, and medias, have a great influence on the desire for sport tourism. Compared with the past tourism that were mostly passive and superficial sight seeing tour, sport tourism is an active and exhilarating tour, therefore sport tourism could provide tourist with satisfaction of needs. Sports tourism is sure to become one of major industries. This study was done with the limited data, so the result does not fully represent the comprehensive impact of sport tourism and strategies of sport tourism resources.

지역병원에서 다발성 손상환자 후송시에 문제점

김영식,안무업,임경수,황성오,조남천,강성준 대한응급의학회 1992 대한응급의학회지 Vol.3 No.2

A prospective review of 53 multiple injured patients(ISS≥16) initially treated at local community hospitals and subsequently transported more than 50km to referral emergency center was completed. All injury mechanisms were blunt, and among them traffic accidents occupied the 54.7%. Revised Trauma Score ranged from 0 to 12 (mean, 10.4) and Injury Severity Score ranged from 16 to 50 (mean, 24.3). No prior notification of patient transfer to the referring facility were received in 52(98.1%) cases, and absent or very incomplete record were evident in 44 (83.0%) cases. The quality of care during initial stabilization and transport was evaluated by ATLS guideline for airway management, cervical immobilization, breathing support, treatment of shock, fracture immobiliaztion, neurologic evaluation, secondary assessment, life-threatening deficiencies were identified in 10(18.9%) patients and serious deficiencies in 32(60.4%). Most frequent departures from these standards involved failure to place a nasogastric tube before transport(58.5%), inadequate breathing support(30.2%), inadequate cervical immobilization(24.5%) and inadequate shock treatment(17.0%). This study demonstrates the need for education of emergency physicians about priorities in trauma management and ATLS courses. Furthermore guidelines for transport and interhospital communication must be established in rural area.

합기도 수련생의 수련 지속 요인에 관한 연구

김의영,남승현,김석일,정용우,정천규 龍仁大學校 武道硏究所 1998 武道硏究所誌 Vol.9 No.1

This study investigated participants who have taken part in Hapkido continuously, in view of age, carrier in exercise, and gender and then analysed how these factors affect continuous participation in Hapkido. 1) The significant factors which enable the participants to continue Hapkido were revealed as health/physical fitness(71.67%), enjoyment / interrest (58.13%), self-protetio / guard(48.28%), phychological benefits(20.94%) 2) The factors of continuing Hapkido were different in ages, which showed significant differences in phychological benefits, skill fulfilment / challenge, accomplishment / position, charm, recreational activity. The response represented specifically in one or two areas in case of younger participants. The more aged, it showed relatively even distribution to the various responses due to the broaden span of thoughts. 3) The factors of continuing Hapkido were different in carrier, which showed significant differences in self-protection / grard, skill fulfillment / challenge, accomplishment/ position in different experiences in exercise. By the time of reaching first phase and second phase, it is thought to show the psychological effect of continuing exercise unconsciously in various areas. 4) The factors of continuing Hapkido were not different in gender, which implicated the fact that the overall attitude and thoughts on Hapkido of female participants and male participants are similar.