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동창림,동춘희,동련화,박종서 中央醫學社 1990 中央醫學 Vol.55 No.8
In augmenting the Oriental noses with silicon implants Dong's guider innovated and has been applied to faciliation of the surgery among the population of the cosmetic cases of more than 70,000 in the Peiple's Republic of China. Using Dong's guider takes the operation time only three to five minutes and attains to high efficancy. This new technique is merely simple and lessens the patient's distress.
林漢鍾,李駿商,金東彦,鄭城守 고려대학교 의과대학 1980 고려대 의대 잡지 Vol.17 No.1
It is recognized that Ko Heung Gun is the most well known endemic foci of paragonimiasis in Korea. Authors carried out the survey for human paragonimiasis in Po Du Myun, Ko Heung Gun (from 1968 to 1979) by the use of intradermal screening test with Veronal buffered saline antigens. In 1968 and 1979, inhabitants, of all age groups in these areas were examined. In 1979, 1,484 middle school students in Po Du Myun and 1,247 high school students in Ko Heung Eup were examined. The infestation rate of crabs with Paragonimus metacercaria was also examined. The following results were obtained in this survey. 1. In 1968, 353 inhabitants were showed 56.9% positive reaction, with sexual difference of 60.2% in male and 50.8% in female. The positive rate was shown over 50% in the age groups of over 10 years old. 2. In 1979, 387 inhabitants were showed 48.8% positive reaction, with sexual difference of 61.0% in male and 38.6% in female. The positive rate was shown over 50% in the age groups over 40 years old. 3. In 1979, middle school students in Po Du Myun were showed 16.4% positive reaction and high school students in Ko Heung Eup were showed 5.7% positive reaction. 4. The positive rate of Paragonimus metacercariae was 25.0% in crabs (Eriocheir japonicus) and the mean number of metacercaria per crab was 0.6.
하악 대구치 Ⅱ형 근심 근관에서 치근단 부위의 만곡도 조사
윤혜림,이동균,황호길 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.2
Objectives: The purpose of this study was to evaluate the buccolingual curvature at the apical one third in type Ⅱ mesial canals of mandibular molars using the radius and angle of curvature. Materials and Methods: Total 100 mandibular molars were selected. Following an endodonticaccess in the teeth, their distal roots were removed. #15 H- or K-files (Dentsply Maillefer) were inserted into the mesiobuccal and mesiolingual canals of the teeth. Radiographs of the teeth were taken for the proximal view. Among them, type Ⅱ canals were selected and divided into two subgroups, Ⅱa and Ⅱb. In type Ⅱa, two separate canals merged into one canal before reaching the apex and in type Ⅱb, two separate canals merged into one canal within the apical foramen. The radius and angle of curvature of specimens were examined. Results: In type Ⅱ, mean radius of curvature in mesiolingual and mesiobuccal canals were 2.82 mm and 3.58 mm, respectively. The radius of the curvature of mesiolingual canals were significantly smaller than that of mesiobuccal canals in type Ⅱ, and especially in type Ⅱa. However, there were no statistically significant differences in radius of curvature between mesiobuccal and mesiolingual canals in type Ⅱb and there were no significant differences in angle of curvature between type Ⅱa and Ⅱb. Conclusion: In this study, type Ⅱ mesial canals of mandibular molars showed severd curvature in the proximal view. Especially, mesiolingual canals of type Ⅱa had more abrupt curvature than mesiobuccal canals at the apical one third.
임재명,오종민,박완철,한동준 경희대학교 환경연구소 1994 環境硏究 論文集 Vol.5 No.-
The composting process is a suitable to dispose the livestock manure in terms of resources recovery. However the performance of composting process is greatly affected by the environmental conditions such as characteristics of manure, type of the bulking agent, Initial moistuer contents, temperature, recycle and so on. The purpose of this study is to evaluate the optimum environmental conditions of composting process for livestock manure. 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 ratio but poor ventilation characteristics. In addition, the initial moisture 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.
임재명,한동준 江原大學校 産業技術硏究所 1997 産業技術硏究 Vol.17 No.-
This study aims to develop the combined septic tank for middle-small scale sewage treatment. The developed process were circular and separate type. The circular combined septic tank was controlled sludge discharge and could be modified the advanced treatment system. The separate combined septic tank was could be applicated wastewater that discharge flow was varied, and was could be maintained F/M ratio constantly. The optimum hydraulic retention time was about 16 hours.
춘천시 생활쓰레기의 위생관리를 위한 배출 및 잊 ·화학적 특성
임재명,강성환,한동준,김병욱 江原大學校 産業技術硏究所 1997 産業技術硏究 Vol.17 No.-
Generation and physico-chemical characteristics of municipal solid wastes are very important for sanitary management. However, that has not been investigated os far especially in chunchon. And so, we tried to examine many things in detail. It was resulted that density was 90∼94kg/㎥ in school and office zone and 290∼kg/㎥ in apartment and market place. The compositional weight fraction was food, 40∼54%, paper, 14∼18%, vinyl and plastic, 14∼20% in house zone and market place and paper, 42∼70% in school and office zone. Moisture was estimated to be 54∼57% in independent house zone, apartment and market place and 11∼23% in school and office zone. And three composition was water content, 44.1%, incineration particle, 11.2%, volatile parts, 44.7% in respectively. That is because of seasonal effects and regional characteristics. In the results of chemical composition and caloric value analysis, carbon(C) was 80% in vinyl and plastic and oxygen(O) was 54.4% in paper.
목질계 Bulking Agent가 돈분의 1차 퇴비화에미치는 영향
임재명,한동준,강현재 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-
The objective of this study was to determine the operational parameters in pig manure compo-sting in which sawdust was used as a bulking agent. The efliciencies of the sawdust as a carbon source and the moisture control capabilty in composting process are investigated. The effect of compost recycling is studied as well. When the C/N ratio increased from 17 to 28. decomposition of volatile organic matter improved because of the increased conversion to carbon. However, at a ratio above 28. it decreased. During the composting both the conversions of inorganic nitrogen to organic nitrogen and the carbon to CO_(2) showed a tendency to increase. As a result pH increased to a range of 8.5~8.9. and it appeared that prevention of the loss of nitrogen was not possible. Volatile organic matter was most effectively decomposed at a 60% of the initial moisture content. The content of sawdust required to maintain an appropriate C/N ratio and the moisture content was 17% and 30% of the pig manure on wet weight basis, respectively. It was impossible to meet the appropriate operational requirements simulta-neously by using bulking agent only. With respect to the improvement in volatile organic decomposition. the optimum recycle ratio appeared to be 14% of pig manure on wet weight basis. which accounts for approximately 45% of the amount of sawdust used.
임재명,한동준 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-
This research aims to develop biofilm process for the nutrient removal of piggery wastewater. The developed process is the four stage anoxic-oxic biofilm process with recirculation of the final effluent. In summery, the results are as follows:1.Nitrigication in the piggery wastewater built up nitrite because of the high strength ammonia nitrogen The nitrigication of nitrobacter by free ammonia was inhibited in the total ammonia nitrogen loading rate with more than 0.2kgNH_(3)-N/㎥·d 2.The maximal total ammoria nitrogen removal rate was obtained 22℃ and without being affected by the loading rate. But oxidized nitrogen production rate was largely affected by loading rate. 3.Autooxidation by the organic limit was cause of the phosphorus release in the aerobic biofilm process. But the phosphorus removal rate was 90 percent less than the influent phosphorus volumetic loading rate of above 0.1kgNH_(3)-N/㎥·d Therefore the phosphorus removal necessarily accompanied the influent loading rate. 4. On the anoxic-oxic BF process the total average COD mass balance was approximately 67.6 percent. Under this condition the COD mass removal showed that the cell synthesis and metablism in aerobic reactor was 42.8 percent and that the denitrification in anoxic reactor was 10.7 percent, respectively.
생물학적 황산염 환원올 이용한 금속광산 갱내수의 증금속 제거
임재명,이찬기,한동준 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-
A laboratory experiment was performed to investigate the mine drainage treatment using the biological sulfate reduction. An acetate- added synthetic wastewater was used because of low organic content in the acid mine drainage. The Presence of heavy metals in the synthetic wastewater was an operational variable for the laboratory experiment. On the basis of series of experiment, it was found that the sulfate reduction rate and or-ganic removal rate increased with an increment of hydraulic retention time in the laboratory reactors. It was also note that the reactor fed with wastewater containing heavy metals showed a better Performance. It was reasoned that the reduction of sulfide(S^(2-)) toxicity due to the heavy metal complexation, resulting an enhanced microbial activity in the reactor fed with wastewater containing heavy metals, Total removal rate of heavy metals in the lab re-actor was highly correlated with the sulfate reduction rate, and the sulfate reduction rate was closely related with COD removal rate. In addition, an order of heavy metal removals during the sulfate reduction was found as follows : Zn >Pb >Co>Ni>Cu