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金熙鍾,柳又秀,金佳鉉,申東守,韓健模,全裕燦 東亞大學校 大學院 1984 大學院論文集 Vol.9 No.-
This paper is a study on relation between run-off ratio and antecedent discharge, run-off ratio and antecedent discharge per unit area, antecedent discharge and antecedent precipitation, by the data from the five major river basins in Korea and the small river basins in Pusan. The Nak-Dong rivers(An-Dong upper stream) f=0.4780+0.0124 ln qA r=0.99 qA=0.3368e0.1101R r=0.99 f=0.5793+0.0146 ln(qA/A) r=0.99 The Nak-Dong rivers except Ga-song station f=0.2017-0.0840 ln qA r=0.75 f=0.7012+0.0750 ln(aA/A) r=0.71 The Han rivers f=-0.0035+01267 on qA r=0.75 f=1.1311+0.1263 ln(qA/A) r=0.71 L=302.9064-43.8490 ln qA r=0.84 The Geun rivers(Mu-sin Cheon) f=0.295+0.1823 ln qA r=0.93 f=0.8417+0.1823 ln(qA/A) r=0.93 L=40.0456+62.0346 ln qA r=0.94 The Yeong-san rivers f=0.3766+0.0598 ln qA r=0.79 f=0.8084+0.0599 ln(qA/A) r=0.79 The Seom-jin rivers f=-1.3875+0.6505 ln qA r=0.92 f=2.1633+0.3465 ln(qA/A) r=0.76 Small river basin in Pusan f=0.3635+0.1120 ln qA r=0.87
한동준,강현재,임재명 江原大學校 産業技術硏究所 1993 産業技術硏究 Vol.13 No.-
The composting process is a suitable to dispose the livestock manure in terms of resources recovery. However the performence of composting process is greatly affected by the environmental conditions such as characteristics of manure, type of the bulking agent, initial moisture contents, temperature, recylcle and so on. The purpose of this study is to evaluate the optimum environmental conditions of composting process for livestock manures. The analytical results indicated that no bulking agent was necessary for the cow manure because of the proper C/N ratio. However the pig manure required a bulking agent since the pig manure had not only low in C/N ration but poor ventilation characteristics. In addtion, the initial miosture content for optimum composting appeared to be about 60%. The temperature control was also an essential factor to enhance the activity of thermophilic microorganisms in the laboratory composting unit. It was further found that the recycle of composts may contributed the completion of composting precess as well as C/N ratio reduction and moisture control.
순천향대학교 학생들의 거주형태별 환경, 보건 및 복지실태
한성현,송라윤,한동우 순천향대학교 사회과학연구소 1998 순천향 사회과학연구 Vol.3 No.2
Three major factors influencing students' general well-being of school life were investigated: environmental, health, and welfare. A Survey was conveyed among all attending students of Soonchunhyang University by a structured questionnaire method to which was follwed by a complementary survey to explore and identify the housing situation of school area residents by the trained interviewers. Respondents tended to show relatively low degree of satisfaction regarding almost items regarding environmental and welfare conditions adressed. Residence types were significantly related to three factors. Research results suggest that more programs to meet the students' needs of environmental, health, and welfare services and facilities be provided.
EXPERIMENTS ON THE INTERACTION OF WATER SPRAYS WITH POOL FIRES
Han,Yong-Shik,Kim,Myung-Bae,Shin,Hyun-Dong 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-
A series of measurements and visualization to investigate the interaction of water sprays with pool fires is presented. Fire source is a small-scale pool burner with methanol, ethanol and gasoline. Measurements of temperatures, <TEX>$O_2$</TEX>, <TEX>$CO_2$</TEX>, and CO concentrations along the plume centerline are carried out to observe pool fire structures without water sprays. Visualization by the Ar-ion laser sheet shows flow pattern of droplets of the sprays above the pool fires. It is observed that in the case of methanol and ethanol, water sprays continuously penetrate into the center of fuel surfaces. The gasoline pool fire allows intermittent penetration of water sprays because of pulsating characteristics of the gasoline flame. To evaluate the cooling effect of the fuel surface by the sprays, the temperature was measured at the fuel surface. As soon as the mists reach the fuel surface of methanol and ethanol, the temperatures of the fuel surface decrease rapidly below the boiling point, and then the fires are extinguished. Due to the application of mist upon the gasoline fire, though the fuel temperature decrease abruptly at the time of the injection, such a rapid decrease do not continue till the extinction point.
민어(Miichthys miiuy)의 卵發生過程 및 仔稚魚 발육단계에 따른 형태발달
한경호,오성현,황동식,조영현,서대철 한국어류학회 2002 韓國魚類學會誌 Vol.14 No.2
본 연구는 2000년 8월 19일 전라남도 신안군 임자도 연안에서 2각망으로 어획된 민어 어미를 인위적인 방법으로 수정하여 부화 사육하면서 관찰한 卵發生 過程 및 仔稚魚 형태변화는 다음과 같다. 1. 민어의 受精卵은 구형의 분리 부성난으로 알의 크기는 0.96~1.08㎜(평균 1.01㎜, n=50)였고, 크고 작은 油球가 1~5개(0.06~0.34㎜) 존재하였다. 2. 사육수온 25.2~28.4℃에서 受精 후 17시간 10분에는 배체가 卵膜을 뚫고 머리부터 孵化하기 시작하였다. 3. 孵化 직후 仔魚의 전장은 2.36~2.63㎜(평균 2.48㎜, n=10)로 전장의 45.0~47.0%에 달하는 큰 卵黃(장경 1.11~1.20㎜, 단경 0.92~0.96㎜)을 가지고 있으며 筋節은 7~8+ 17~19=24~27개였다. 4. 孵化 후 3일째 仔魚는 전장 3.98~4.32㎜(평균 4.16㎜, n=10)로 입은 열려있었고, 이 시기에 섭이활동이 활발하게 관찰되면서 卵黃이 완전히 흡수되어 後期仔魚期로 이행되었다. 5. 孵化 후 10일째 後期仔魚는 전장이 5.88~6.74㎜(평균 6.30㎜, n=10)로 꼬리의 말단이 굽어지기 시작하는 시기로 黑色素胞가 기저후두골 뒷부분의 체측에서 점모양 및 나뭇가지모양 으로 출현하였다. 6. 孵化 후 31일째 개체의 전장은 9.62~12.76㎜(평균 11.12㎜, n=10)로 모든 지느러미가 정수에 달하였고, 체형이나 반문이 成魚와 닮아 種魚期로 이행하였다. Egg development and morphological change of larvae of the brown croaker, Miichthys miiuy, were investigated after obtaining samples by artificial insemination. The spawning season extends from the middle to the end of August in the seas off Lim-ja Island, Cheollanam-do. The fertilized eggs were transparent, spherical, separate and they floated. Egg diameter ranged 0.96~1.08㎜ with several oil globules of 0.06~0.34㎜. Hatching occurred 17 hours 10 minutes after fertilization in 25.2~28.4℃ water temperature. The newly-hatched larvae were 2.36~2.63㎜(mean:2.48㎜, n=10) in total length(TL), had a large yolk, and 7~8+17~19=24~27 myotomes. Melanophores were distributed on the eye lens. Three days after hatching the larvae had attained 3.98~4.32㎜ in TL(mean:4.16㎜, n=10), the yolk sac was completely absorbed, and they had transformed into the postlarva stage. The larva reached the juvenile stage with all fins formed and with a complete set of fin rays(D.Ⅹ-28~31;A.Ⅱ-7~8;P. 21~23;C. 19~21;V. 25~26) on the 31st day after hatching. The juveniles were 9.62~12.76㎜(mean:11.12㎜, n=10) in total length. At this point the juvenile was similar to the adult in body form and pigmentation pattern.
Experimental study on condensation heat transfer characteristics of special heat transfer tubes
한규일,박종운,권영철,조동현 대한설비공학회 2001 설비공학 논문집 Vol.13 No.9
In this study, condensation heat transfer characteristics were conducted with special heat transfer tubes of SH-C type. Experiments were carried out the saturated vapor temperature of 334K and the wall subcooling of 1.5-4.5K. The refrigerant was R-113 and the enhanced tubes used in the present study were SH-CDR, SH-CYR and SH-CHR. The experimental results showed that the condensation heat transfer coefficients of SH-C type tubes were about 23-66% higher than those of a low integral-fin tube. It was visualized that the condensed liquid on the outer surface of SH-C type tubes flowed continuously down unlike a low integral-fin tube and a plain tube, due to a 3-D extending fin on the outer surface of SH-C type tubes. As a result, the thermal resistance of the condensed liquid decreased and the heat transfer coefficient increased. Also, the enhancement ratio of SH-CDR tube was the highest, and it was about 9-11 times as compared to that of a plain tube.