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전영민,성백섭,김미애,차용훈 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-
In the hot forging process, the forging faulty product due to strain and temperature should be controlled in order to obtain sound S/CAM forging products. The forging defects that are caused by metal were strain, temperate, and inclusion. But the control of forging defects has been based on the experience of the foundry engineers. In this paper, the computer simulation analyzed the effective plastic strain and temperature behaviors. The quantitative analyses which proposed the effective mold design of S/CAM shaft was executed. The parameters of forging shape that affected on the optimize conditions that was calculated with simple equation were investigated. it is expected that the developed analysis model and design technique would greatly contribute to the drum brake optimal design considering effective plastic strain and temperature affected behaviors.
비화농성 삼출성 복수를 동반하는 질환에서 복막 침생검의 진단적 의의
정종훈,서용태,오덕환,채종구,정춘해,조건국 朝鮮大學校 附設 醫學硏究所 1986 The Medical Journal of Chosun University Vol.11 No.1
Percutaneous needle biopsies of peritoneum with Abrams needle and Cope needle were done un 64 patients with non-purulent exudative ascites, who was admitted to the department of internal medicine, Chosun University hospital, from January 1978 to Deccmber 1983. The diagnostic significance and safety of the needle biopsy was estimated. The results were as follows. 1. Adequate peritoneal tissue for pathological diagnosis was obtained in 53 cases(82.8%) among 64 cases. (Abrams needle 84.8%, Cope needle 80.6%) 2. Definitive diagnosis was obtained in 31 cases among 53 cases (58.6%). (Tuberculosis 23 cases, malignancy 8 cases). 3. As compared final diagnosis with biopsy result, the rate of final diagnosis corresponding with biopsy diagnosis was 58.8% in tuberculosis and 26.3%, in malignancy, but the rate of biopsy diagnosis corresponding with final diagnosis was 100% in both tuberculosis and malignancy. 4. Cases of chronic non-specific inflammation which were diagnosed by biopsy were 13cases(24.5%)among 53 cases, and among these cases, tuberculosis was 69.2% and malignancy 30.8% on final diagnosis and among 53 cases, histologically normal was 9 cases(16.9%) of which 33.3% was tuberculosis and 66.7% was malignancy on final diagnosis. 5. Of the malignant cases on final diagnosis, Positive cytologic examination of ascitic fluid was 16.7% 6. Primary losions of cancerous peritonitis were stomach cancer (38.9%) hepatocellular cancer(22.2%) colon cancer (11.1%) ovarian cancer (11.1%) Pancreatic cancer (5.6%). 7. Complication of percutaneous peritoneal biopsy was local swelling with leakage of ascitic fluid and the accident rate were 36.4,% in Abraham needle and 3.2% in Cope needle.
忠南地域 屠畜豚의 肺病變으로부터 分離한 Actinobacillus pleuropneumoniae의 生物學的 및 免疫學的 特性
이종훈,장경수,장치훈,김일택,정용성,김귀현,전무형 충남대학교 수의과대학 동물의과학연구소 1996 動物醫科學硏究誌 Vol.4 No.-
An epidemiologic study on pleuropneumonia in the slaughter pigs(Chonan and Asan area, Chungnam province, Korea) during the period of January 1994 through December 1995 was conducted. Isolation of A. pleuropneumoniae was attempted in 425 pigs with pneumonic lesions. Biochemical properties, antimicrobial susceptibility, serotypes and pathogenicity of A. pleuropneumoniae isolates were investigated. In addition, outer membrane protein(OMP) of the isolates were extracted to determine its properties and immunogenicity in both mice and piglets. Of 3,395 slaughter pigs, pleuropneumonia was observed in 425 pigs(10.6%). A. pleuropneumoniae was isolated from 22 pigs(5.2%) out of 425 pigs with pneumonic lesions. The biochemical properties of all isolates were same as those of reference A. pleuropneumoniae strain. Among 22 isolates, 9, 1 and 12 isolates were serovar 2, 3 and 5, respectively. The results of antimicrobial susceptibility test revealed that the isolates showed high susceptibility to ciprofloxacin and cephalothin, moderate susceptibility to amikacin, gentamicin, kanamycin and streptomycin, and low susceptibility to erythromycin, tylosin and sulfadimethoxin. The isolates were varied in pathogenicity to mice. Median lethal dose of LE9402(serovar 2) and LE9511(serovar 5) were 9.2×10^7CFU and 2.8×10^7CFU, respectively. Specific pneumonic lesions were observed from the infected mice with clinical signs. Bacteria recovery rate was high in the lung, but low in heart blood and tracheas. Serovar 2 was found to be more pathogenic than serovar 5 in guinea pig. Mortality on guinea pigs inoculated with serovar 2(5.4×10^8 - 5.4×10^6CFU) abd serovar 5(2.8×10^8 - 2.8×10^6CFU) was 20-40% and 40-80%, respectively. A severe hemorrhagic lesions and focal pneumonic lesions were observed from dead guinea pigs. Bacteria recovery rate was relatively higher in the lung than that of other organs. In the SDS-PAGE analysis, OMP-enriched fractions of both isolates and reference strains contain common peptide bands equivalent to molecular weight of 17, 27, 42, 52 and 95Kd. In addition to common peptide bands, the bands which are specific to each isolate were also observed. The profiles of Sephadex G25 fractions showed 3 major peaks. The common peptide bands which were observed by SDS-PAGE of the crude OMPs were found i the peaks 1 and 2. The OMPs extracted from serovar 2(LE9402) and serovar 5(LE9511) provided high level of protection in mice(70-80%) and pigs(100%). All animals inoculated with OMPs were seroconverted, showing micro-agglutination titer of 640 to 1280.
고립성 폐결절의 조직학적 진단에 있어서 경기관지폐생검의 진단적 가치
김치훈,김정주,왕준호,연규민,김형수,리원연,용석중,신계철 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-
Transbronchial lung biopsy(TBLB) is a relatively simple and convenient diagnostic tool in solitary pulmonary nodule(SPN) on chest radiograph, which is cannot be diagnosed through routine tests. To investigate the diagnostic value and diagnostic rate of TBLB according to the variable factor, we analyzed 69 patients with radiologically SPN lesion on chest radiograph which was confirmed histologically. A histologic diagnosis of TBLB was made in 47 of 69 patients(68.1%), in which 26 of 37(70.3%) with malignancy and 21 of 32(65.6%) with benign lesion. There were no significant differences in diagnostic yield according to age, sex and location of the lesion. The diagnostic rate tended to increase with the more than 5 pieces to acquired by TBLB. When the size of SPN was less than 3 ㎝, it cannot be diagnosed. In conclusion, TBLB is a diagnostic procedure with good yield and safety, but percutaneous needle aspiration, transbronchial needle aspiration, and bronchial washing fluid cytology may be a complementary procedure to overcome the limitation of TBLB and get higher diagnostic yield for SPN.
소뇌교각에 발생한 교모세포종 1례 : 증례보고 Case Report
송준혁,임동준,정용구,이기찬,이훈갑 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.12
Glioblastomas rarely occur in the posterior fossa. The authors present clinical and pathological findings in a 59-year-old female patient with a glioblastoma growing primarily in the cerebello-pontine angle. The patient presented with a 1-month history of diplopia. Neurological examination revealed right-sided trigeminal and abducens nerve paresis. Cerebral magnetic resonance imaging showed a well-enhancing mass at cerebello-pontine angle. Following near total removal via petrosal approach, the pathological examination revealed a glioblastoma. To the authors knowledge, this represents the first case of glioblastoma arising at cerebello-pontine angle probably originating from the most proximal part of abducens nerve.
김경훈,전용은 金烏工科大學校 1998 論文集 Vol.19 No.-
An ice-on-coil storage tank has been modeled to analyze the charging and discharging processes in the ics storage system. This paper describes the basic heat transfer analysis and presents the characteristics of the charging and discharging modes determined from the model. The series conifiguration with the chiller upstream is common in the ice-on-coil systems. Chilled water leaving the chiller passes through a large number of small tubes in the tank that effectively transfer the heat from the storage medium to the transport fluid and provide a large surface area per unit of storage. In the system of the ice storage tank. it is necessary to control the brine outlet temperature at a constant value during the charging and discharging periods. The brine outlet temperature can be controlled by the brine flow rate. To maintain the outlet temperature at aconstant value, the brine flow rate should be regulated with respect to time. For various outlet brine temperatures, values of the flow rate of brine through the tank by the simulations are compared with the data of the manufacturing company, and they are in good agreement