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김민규,Jae Woong Jeon,Il Hwan Ryu, M.D.,Jae Joon Lee,Joo Seok Kim, M.D.,Ji Wook Choi, M.D.,Byung-Sun Cho,Hee Jung Yoon, M.D., Ph.D. 대한감염학회 2014 Infection and Chemotherapy Vol.46 No.1
Mycotic aneurysms are uncommon, but are fatal without appropriate management. Previous reports have shown that anaerobesand gram-negative organisms are less common but more dangerous than other causative agents of mycotic aneurysm. Wereport the case of a 60-year-old man with poorly controlled diabetes mellitus and atherosclerosis in the aorta, and a 10-day ofhistory of lower abdominal pain and fever. This man was diagnosed with an uncommon abdominal aorta mycotic aneurysmcaused by Bacteroides thetaiotaomicron and Acinetobacter lwoffi i. The aneurysm was successfully treated with antibiotics therapyand aorto-bi-external iliac artery bypass with debridement of the infected aortic wall. We present this case together with areview of the relevant literature.
축분뇨 액비 저장조의 운영실태 및 악취 물질 발생량 조사
김태일,송준익,정선,정종원,정의수,유용희,양창범,김민규,Kim T. I.,Song J. I.,Joung S.,Jeong J. W.,Chung E. S.,Barroga A. J.,Yoo Y. H.,Yang C. B.,Kim M. K. 한국축산환경학회 2005 축산시설환경학회지 Vol.11 No.3
본 연구는 국내에 설치되어 있는 액비저장조의 운영실태를 조사하고, 액비저장조에서 발생되는 악취물질을 구명하고자 수행하였다. 1. 국내에 200톤 규모의 액비저장조를 설치한 60 농가를 대상으로 한 본 조사에서 약 $93\%$가 액비저장조를 제대로 가동을 하고 있었으며 이중 $57\%$가 액비제조시 폭기 처리하고 있었다. 2. 조사 농가 중 년간 액비의 활용 횟수는 2회가 $50\%$로 나타났고 액비의 부숙 효과를 높이고 악취를 저감시키기 위한 목적으로 $64\%$가 미생물제제를 첨가하고 있었다. 반면에 액비 이용시 인력 장비의 비용 및 악취물질 발생 저감을 위한 첨가제 비용이 $43\%$로 조사되어 액비이용 시 문제점으로 지적되었다. 3. 액비 제조 형태별 악취물질 발현양상으로 호기 제조시 액비저장조내에서는 iso-valeric acid가 0.012에서 0.07ppm, Propionic acid가 $0.17\~2.85ppm$의 범위로 검지되었으며 혐기 제조시에는 n-Butyric acid가 1.5에서 2.3ppm, n-valeric acid가 $1.3\~1.8ppm$, acetaldehyde가 0.8에서 2.1ppm로 검지되어 호기 제조방법과 혐기 제조방법 모두 휘발성 지방산의 농도는 악취방지법의 규제농도 이상이었다. 부지경계선에서의 악취물질을 보면 호기시에는 미검출로 나타났고 혐기 제조시에는 Acetaldehyde가 $0.4\~0.9ppm$ 수준으로 검지되어 악취방지법의 규제농도를 초과였다. This study was carried out to determine the acceptability of liquid manure bin among livestock farmers and agricultural farmers, and quantify its malodorous compounds. The results were as follows; 1. The size of the manure bins owned by $93\%$ of 60 farmers surveyed was 200 M/T and were all in normal operation. Around $57\%$ of the normally operated bins were processed under aerobic condition. 2. Filly percent of the respondents utilized their liquid manure bin twice a year while $64\%$ used commercial microbial products to enhance maturity of their liquid manure and abatement of malodorous emissions. On the other hand, $43\%$ mentioned problems on the labor requirement, mechanical maintenance and lending cost of liquid manure processing and utilization, and the price of the commercial microbial products. 3. Malodorants emitted from livestock liquid manure bins and their boundary bin depended upon the livestock liquid manure processing condition. Within bin under the aerobic processing condition, Iso-valeric and propionic acid were ranged 0.012 to 0.07ppm and 0.17 to 2.85ppm, respectively. Within bin under the anoxic processing condition, n-butyric, n-valeric acid, and acetaldehyde were ranged 1.5 to 2.3ppm, 1.3 to 1.8ppm, and 0.8 to 2.1ppm, respectively. Malodorants emitted from the boundary of livestock liquid manure bins under the anoxic processing condition were detected the range of 0.4 to 0.9 ppm, more than the concentration of law regulation, as an acetaldehyde, but under the aerobic processing condition, they did not any detection.
[디젤엔진부문] 직접 분사식 디젤 기관의 단공 연료 인젝터의 미립화 특성에 관한 실험적 연구
김민규(M.K. Kim),이기형(K.H. Lee),이창식(C.S. Lee) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The work describes the spray characteristics of single hole injector in the direct injection type diesel engine. The characteristics of fuel spray such as droplet size and velocity were measured by phase Doppler particle analyzer. The influence of injection pressure on the droplet size shows that the higher injection pressure results in the decrease of mean droplet diameter. The minimum droplet size of fuel spray appears on the location of 40mm axial distance from nozzle tip of fuel injector. The correlation between the droplet size and axial velocity of the fuel spray due to the change of axial and radial distance were discussed..