糞尿와 都市廢棄物의 混合處理에 대한 硏究 (Ⅱ)

金熙鐘,孫晋彦,金燦國,金相烈 동아대학교 환경문제연구소 1978 硏究報告 Vol.2 No.1

糞尿와 固形廢棄物중의 燃炭재를 混合合成 하여 肥料化 함에 알맞는 消化條件을 糞尿溶液의 物性(稀釋配率 및 返送汚泥의 配合比率), 燃炭재의 特性(粒子의 크기 및 配合比率), 空氣流量 및 消化時間등의 變化에 따라 硏究하였으며 이 들 사이의 相關關係를 檢討하여 다음과 같은 結果를 얻었다. 1. 稀釋律이 클수록 消化速度는 크며 最適의 稀釋律은 10배이다. 2. 消化時間은 24∼36時間 사이에서 가장 消化速度가 크며 12시간 까지는 거의 소화되지 않는다. 3. 空氣流量이 0.1∼0.02 (vol-ratio/sec) (air/sample)의 범위에서는 流量이 적을수록 소화속도가 증가한다. 燃炭재가 混合 되었을 때와 그렇지 않을 경우의 最適流速은 각각 0.025 및 0.018 (vol-ratio/sec) (air/sample)이다. 4. 燃炭재의 粒子의 크기는 클수록 消化 效果가 크며 最適의 粒子의 크기는 5∼10mesh이다. In the composting with the nightsoil and anthracite bully ash for he usable disposal of urban wastes in the city of Busan, the study on the appropriative condition to the digestion according to the ratio of dilution of nightsoil, the compounding ratio of the treated nightsoil and the ash, the particle size of solid waste the flowrate of air and the time of reaction has obtained as the following results. ⅰ) Rate of digestion seems to increase in proportion to the dilution as the optimum ratio of diluton is 10 rimes. ⅱ) Digestion has not been to carried till 12 hrs., but the velocity of reaction is maximum at the 24∼36hrs. ⅲ) In the range of 0.1∼0.02 (vol-ratio/sec). (air/sample), the flowrate of air is in inverse proportion to the rate of digeston. In the case of mixing with anthracite ash the optimum is 0. 025 but wit without case is 0.018 (vol. ratio/sec) (air/sample). ⅳ) The particle size of the ash is accelated to the velocity of digestion such as available size. is 5∼10 mesh.

업무특성이 비동기 매체를 통한 커뮤니케이션 성과에 미치는 영향에 관한 연구

박찬희,김무성 中央大學校經營硏究所 2003 經營學論集 Vol.29 No.2

韓國河川의 流出率과 流出指標로서의 洪水直前 流量

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

糞尿와 都市 廢棄物과의 混合處理에 대한 硏究 (Ⅰ) : 肥料化를 中心으로한 實驗室的 考察 Experimental study for the fertilization

金熙鐘,金相烈,金秀生,孫晋彦,金燦國,成周慶,吳英敏 동아대학교 환경문제연구소 1977 硏究報告 Vol.1 No.1

우리나라에 있어서 都市廢棄物의 主인 糞尿와 固形廢棄物의 太宗인 無煙炭재를 同時에 效果的으로 處理할 수 있고 또한 堆肥化시킬 수 있는 好氣性 酸化方式의 最適條件을 얻기 위하여 生糞尿 및 煉炭재의 理化學的 및 生物學的 數値를 測定하고 이를 基礎로하여 上記 兩者를 混合處理 할수 있는 消化條件(溫度, 糞尿와 煉炭재의 配合比, 기타 固形物의 添加量, 注入되는 空氣量의 變化)에 따른 C.O.D., B.O.D.의 變化, 水分 및 電氣傳導度의 變化, 熱灼減量, N量의 變化 等을 硏究하였으며 이들 사이의 相關關係를 檢討하여 다음과 같은 結論을 얻었다. 1. 生糞尿에 固形廢棄物인 煉炭재나 紙類를 配合시켜 消化시키므로서 케이크속의 질소成分의 量을 增加 시킬수 있다. 2. 煉炭재의 配合은 糞尿의 消化速度를 增加 시킨다. 3. 糞尿의 處理를 위한 反應槽의 溫度는 50℃보다 60℃로 維持 시킬때 消化速度가 크다. 4. 反應槽의 溫度를 一定하게 했을때 空氣의 注入速度는 初期 反應時는 적게하고 後期 反應時는 크게 함이 效果的 이다. For the effective treatment and usable disposal of urban wastes in the area of Busan city, the composition of the nightsoil and anthracite bulky ash which is the main munic ipal solid wastes have been studied on the digestion of the compositive mixtures with the variable conditions that are ratio of compounding between nightsoil and ash, amount of solid additives and volume of air for the effective airation at 50, 65℃. The digestion has been detected by the physico-chemical and biological data; pH, specific gravity, content of moisture, C.O.D., B.O.D., electroconductance of the solution of the results, decrease of nition, and volume of total free nitrogen etc. The results are obtained as follows. 1) The characteristics of domestic nightsoil are different to the foreign data as table 5, but the data of anthracite ash almost are same except the composition of Fe₂O₃ and Al₂O₃. 2) Amount of total free nitrogen are increased by the digestion with the addition of solid waste, as effective absorption, to the nightsoil. 3) The digestion are accelerated by the compounding of ash, but the adding of sulfuric acid to fix the free ammonia reduced reaction. 4) The airation have to proceed slowly at initial step, and then endure enough volume of air at the later step.

韓國河川의 初期損失 雨量과 流量遞減曲線에 관한 硏究

金熙鐘,全裕燦,金一龍 東亞大學校 1986 東亞論叢 Vol.23 No.1

Water discharge recession curves of runoff were composed for 6 basins from long term discharge data which has been examined on their reliability. The attenuation constant of a master recession curve between base water-discharge and initial storm loss was compared with a simple index made from geographic gradient and geologic matrix of each basin. The two values seem to have correlation, provided that the river density is taken into account. It strongly suggests that the quantative relationship between master recession curve and geography and geology of the basin would possibly be existent. The results obtained are summarized as follows; 1. a relationship between Initial storm Loss and Base Water-Dischre; r=0.74, 0.83, 0.77, 0.99, 0.98, 0.89, t=95%over 2. a relationship between constant of Initial Storm Loss (c) and Recession Coefficient; r=0.82 t=95%over 3. a relationship between River Density and Recession Coefficient; r=0.83, t=95%over. 4. a relationship between Average Gradient of the River Basin and Recession Coefficient; r=0.83, t=95%over 5. a relationship between Shape Factor and Recession Coefficient; r=0.823, t=95%over.

Fe-(4~8wt%)Si 압분체의 소결성에 관한 연구

이동희,소찬영 연세대학교 산업기술연구소 1980 논문집 Vol.12 No.2

本 硏究는 高逵素鋼材料인 Fe-Si混合壓粉體의 燒結現象에 관한 基礎硏究로서, 純 鐵粉에 융점이 낮은 Fe-Si合金粉을 혼합한 경우와 純Si粉을 혼합한 경우의 燒結擧動을 조사하고, 燒結方法에 의한 磁氣的 機械的 性質의 변화 양상을 定性的으로 고찰하였다. 硏究方法은 純 鐵粉에 Fe-Si合金粉 및 純 Si粉을 高硅素鋼의 組成範圍인 4%Si에서 8%Si까지의 여러 조성으로 혼합하여 6ton/㎠ 의 압력으로 成形한 후, 수소 분위기 중에서 燒結溫度(1100 ℃-1350℃)와 燒結時間(5分-240分)을 변화시켜 燒結을 행하였으며, 각각의 燒結擧動은 燒結體의 氣孔度, densification para meter, 微細組織을 토대로 검토하였다. 本 硏究結果에 의하면 Fe-Si合金粉을 液相으로 발생시킨 경우가 純粹 固相에 의한 것 보다 燒結이 다소 促進되었으나, 모두 短時間內(30分 이내)에만 效果가 있었다. 그 이유는 液相量이 너무 적고 또, 短時間內에 소멸되어 液相燒結現象의 지속이 오래가지 않았다는 것과, 급격한 結晶粒의 성장 등으로 燒結이 크게 促進되지 못하였다고 分析되며, Fe-Si合金粉의 混合壓粉體를 固相燒結할 경우 1시간 이상 長時間에서 Kirkendall效果에 의해 氣孔度가 다시 증가하는 경향을 보였으며 전체적으로 燒結이 沮害됨을 알 수 있었다. 또한 燒結에 따른 緻密化는 1200℃ 이하 固相燒結에서 純 Si粉의 混合壓粉體 보다 Fe-Si合金粉의 混合壓粉體가 양호한 것으로 나타난 반면, 1250℃ 이상에서는 純 Si粉의 混合壓粉體가 보다 더 緻密化 되었다. 機械的 性質(硬度)은 Si의 組成이 높을수록 증가되었으며, 磁氣的 性質은 예상과는 달리 Si의 組成이 낮은 경우가 양호한 것으로 나타났다. SINTERING OF Fe-(4∼8wt%) Si POWER COMPACTS. The sintering behaviour and the varation of related properties for Fe-Si powder compacts containing various composition of Si from 4%, to 8% have been investigated with mixture of pure iron and pure silicon powders,and mixture of pure iron and Fe-75% Si alloy powders The results obtained in these experiments can be summarized as follows. (1) The enhanced densification for the compacts sintered at high temperatures above 1250℃, where liquid phase of Fe-Si alloy powder begins to occur, was not so high as what could be expected from the conventional liquid phase sintering concepts. The reasons for this can be attributed to the little amount of the liquid phase and its rapid disappearance in compacts during sintering, and the fast grain growth due to the high sintering temperatures. (2) Under the sintering condition of solid state only, the compacts of Fe-Si alloy powder mixtures showed that the densification rate decreased slowly due to the Kirkendall effect for long sintering time over 1 hour. (3) Sintering of the compacts prepared from pure iorn and Fe-Si alloy powder mixture showed an improved densification as compared to that of pure iron/pure Si power mixed compacts under the temperature of 1200℃, but above 1250℃ an opposite result was observed. (4) Magnetic susceptibility of the sintered compacts containing lower Si contents(4.5%) was higher than those of higher Si compacts. This fact is not consistent with the expectation, but it may be attributed to the observed high values of porosity for 6.5% and 7.5% Si compacts in these experiements. Hardness values, however, increased with Si content.

洪水量 추정에 관한 硏究 (Ⅰ) : 臨河(乙)地域을 中心으로 with reference to the Im-Ha region

金熙鍾,全裕燦 동아대학교 환경문제연구소 1986 硏究報告 Vol.9 No.1

The objective of this paper is a study on the presumption of the flood discharge in the Nak-Dong rivers. In this study, the flood discharge was compared observed values with calculated values of Nakayasu's method, storage function method using the computer, and its study will be contributed much to the flood forecast at the Im-Ha region in the Nak-Dong revers

기반의 조화운동을 받는 3자유도 진동계의 진동방지법에 관한 연구

안찬우,이희범,이봉진 東亞大學校 1996 東亞論叢 Vol.33 No.-

By attaching the two degrees of vibration system to the primary vibration system which is modeled as a one degree of freedom, the new vibration system becomes three degrees of freedom. Depending on the driving frequency on the original vibration system, the vibration systems attached needs to be carefully tuned, that is, to choose adequate value of the mass ratio, frequency ratio and damping ratio, so that the amplitude ratio of the vibration system is a minimum. This paper presents the effects of mass ratio, frequency ratio and damping ratio on the resonance frequency ratio, amplitude ratio of three degrees of freedom.

糞尿와 煉炭재로서 肥料化를 위한 反應塔의 最適設計 : 反應條件과 分散板의 特性을 中心으로 Character of distribitor of bubble column and reaction condition

金熙鍾,金燦國,孫晋彦,金相烈 동아대학교 환경문제연구소 1979 硏究報告 Vol.3 No.1

球型反應器와 氣泡塔反應器內에서 糞尿와 煉炭재를 混合合成하여, 肥料化함에 알맞은 消化條件을 糞尿溶液의 物性(稀釋倍率, 表面張力 및 返送汚泥의 混合比率), 煉炭재의 特性, 曝氣流速, 消化中空氣의 가스홀드엎 및 消化時間等의 變化에 따라 硏究하였다. 또한 消化速度에 미치는 두 反應器의 特性을 상호 비교하였으며 이들 인자사이의 상호관계를 檢討하여 다음과 같은 結果를 얻었다. 1. 消化溶液의 表面張力變化에 의해 反應速度의 測定이 可能하였으며, 이는 BOD法이나 COD方法보다는 짧은 時間內에 간단히 측정할 수 있는 장점을 가지고 있다. 2. 球型反應器와 같이 원통형 氣泡塔內에서도 연탄재의 粒子가 클수록 反應速度가 큰 것으로 나타났다. 3. 원통형 氣泡塔內에서는 희석배율이 5배일때가 더 경제적이다. 4. 분산판의 구멍의 지름이 0.9㎜이하에서는 지름이 적을수록 반응의 완결도와 가스홀드엎이 크게 나타났으며, 0.9㎜ 이상에서는 구멍의 크기가 거의 영향을 받지 않는다. The appropriative condition of digestion for the compost of anthracite ash and nightsoil in ball-type reactor and bubble column reactor, according to the ratio of dilution and surface tension of nightsoil solution, the compounding ratio of the treated nightsoil charactor of ash, velocity of aeration, gas holdup during the digestion and the time of reaction, have studied. The different charactor between two reactor which have an effect on degree of completion of reaction and the relation among various factors has been investigated as the following results. ⅰ) The degree of completion of digestion was more conveniently measured by mean of a change in surface tension of nightsoil solution than BOD or COD measurement. ⅱ) The particle size of ash accelated to the degree of completion of digestion in bubble column likewise ball-type reactor. ⅲ) The optimun ratio of dilution economically is 5 times in bubble column. ⅳ) Below 0.9㎜ of hole diameter of distributor, degestion and gas hold up were in inverse proportion to the diameter of hole, but above 0.9㎜ the size of diameter have not an effect an digestion.

3년내 크기 증가를 보인 위 신경초종 1예

김도현,박무인,유찬희,김규종,문원,박선자,장희경 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.2

저자들은 65세 남자 환자의 위 중부체부 대만부 전벽에 발생한 점막하 종양에 대하여 3년간 추적관찰 중 크기증가소견으로 쐐기 절재술을 시행하였으며, 조직검사 및 면역 조직 화학 검사에서 위 신경초종으로 진단한 1예를 경험하였기에 보고하는 바이다. Gastric schwannoma is a very rare gastrointestinal benign tumor, which represents only 0.2% of all gastric tumors and 4% of all benign gastric tumors. We report a case of gastric schwannoma with enlargement of size through serial endoscopic examination. Endoscopic examination showed a hard mass of 4 x 3 cm in size with normal overlying gastric mucosa on the great curvature of the mid-body of stomach. The pathological finding revealed a picture of spindle cell tumor. Immunohistochemical stain was strongly positive for S-100 protein and non-reactive for CD34, C-kit and smooth muscle actin, thus leading to the diagnosis of gastric schwannoma.