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三次元切削에서 表面거칠기와 切削力에 영향을 미치는 因子에 관한 硏究
李炯植,柳能秀 연세대학교 산업기술연구소 1978 논문집 Vol.8 No.1
Three dimensional cutting experiments were carried out in order to find out the effects of the cutting condition fators on the surface roughness of work and cutting force. For this experiments, SM 45c structural steel workpiece and single point tool with cemented carbide tip were used. Five factors, namely, cutting speed, feed, depth of cut, tool nose radius and tool angles were taken as the variables of cutting condition. The most effective factor for surface roghness and cuttive force were tool angle Ce. and depth of cut repectively. However, there is a critical value in cutting speed for the best surface finish. The relation of the five factors with surface roughness and cutting force were shown in three dimensional graphs, and these graphs will be generally applicable to determine the optimum cutting conditions.
유건우,이선희,임수정,박형진,김태신,송은식,송근호 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2009 動物醫科學硏究誌 Vol.16 No.1
A 6 years old Schunauzer dog (7.2kg, intact female) with history of hematuria for two days was referred to the Veterinary Medical Teaching Hospital of Chungnam National University. Complete blood cell count showed no significant abnormalities and serum chemistry profile showed increased phosphate profile. On urinanalysis, there was evidence of bacterial infection. On ultrasonographic evaluation, irregular renal contour and increased echogenecity, pelvic and uretral dilation, and thickening of urinary bladder wall were observed. Based on these finding, the dog was diagnosed as pyelonephritis. The dog was treated with antibiotics based on antimicrobial susceptibility test results, then successfully resolved after 8 weeks of treatment.
유찬,임수정,이선희,박형진,김태신,송은식,김덕환,송근호 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2009 動物醫科學硏究誌 Vol.16 No.1
A 13-year-old, castrated male, Maltese-dog was admitted to the Veterinary Medical Teaching Hospital of Chungnam National University with the history fo petechiae. On physical examination, she had petechiae and ecchymoses at her back, bilateral inguinal region, and inner part of ear pinna. CBC indicated neutrophilia and severe thrombocytopenia. A few platelets, no autoagglutination of RBC, and no spherocyte were observed. Coagulation profile demonstrated normal PT, and aPTT. No significant findings was not found on serum biochemical profile and electolytes test. FNA of a splenic mass which was found on the abdominal radiograph and sonograph demonstrated extramedullary hematopoiesis, Proteinuria was observed on urinarysis. Primary immune-mediated thrombocytopenia was diagnosed by ruling out of other underlying disease, severe thrombocytopenia, and response to immunosuppressive therapy. Prednisone and antibiotics were administered orally and parenterally, respectively. After altering prednisone to azathioprine, the number of platelets was recovered to normal range and petechiae and ecchymoses were improved.
Unusual Case of an Ectopic Spleen
Yoo, Hyung Sik,Lee, Jong Doo,Park, Chang Yun 대한핵의학회 1986 핵의학 분자영상 Vol.20 No.2
Absence of spleen in its normal location on echocardiogram. Associated anomaly: Congenital heart disease of coexisting atrial and ventricular septal defect, right sided aorta, drainage of azygous vein into superior vena cava.
유형식 ( Hyung Sik Yoo ) 연세대학교 의과대학 의사학과 의학사연구소 2011 연세의사학 Vol.14 No.1
The purpose of this study was aimed to explore the scientific activities of the Severance Union Medical College(SUMC) during the Japanese colonial period (1910-1945). It is well known that western medicine was introduced by Dr. H. N. Allen since 1885, and expanded by Dr. O. R. Avison at the beginning of the 20th century. In Nov. 14th, 1914, there search department of SUMC had started as a stone laying in the field of medical research by the missionary doctors. And thereafter, the academic activities of SUMC had been extended through the case conferences, and research meetings of each department until 1945. The activities from SUMC physicians were published in the medical journals named China Medical Journal, Chosun Medical Journal, Mansen no Ikai, The Journal of SUMC, Korean Medical Journal(Chosun Euibo), etc. The lists of the articles published in those journals were analysed periodically following the name of the authors as well as the each basic and clinical department.
자궁경부재발암 환자의 국소동맥 주입식 동위원소 검사 - 방사성 동위원소의 치료시도를 위한 평가 -
유형식(Hyung Sik Yoo),이종태(Jong Tae Lee),박창윤(Chang Yun Park),김은영(Eun Young Kim),서진석(Jin Suck Suh) 대한핵의학회 1990 핵의학 분자영상 Vol.24 No.2
N/A We performed 17 intraarterial scintigraphies in six patients with recurrent cervix cancer. With Seldinger method, the agent (four different radiopharmaceuticals) was perfused at the same speed of infusion of anticancer drugs (25 cc/hour) through internal iliac artery. There were four different radiopharmaceuticals; I-131-Lipiodol, Tc (Technetium)-99m-HSA (Human Serum Albumin), Tc- 99m-Sucralfate and Tc-99m-MAA (Macroaggraegated Albumin). We evaluate the distribution pattern of radioactivity by the use of ratio of Tumor/Extratumor uptake (T/ET ratio). Our results reveals that Tc-99m-MAA scan showed the highest T/ET ratio and the other were not ideal agents for intraarterial therapy of recurrent cervix cancer. In conclusion, an ideal radioisotope and tracer which can block capillary, for example MAA, should be re-evaluated or produced in order to treat the patient with recurrent cervix cancer.
갈색세포종이 의심되는 환자의 평가에 있어서 131I - MIBG Scan의 역할
유형식(Hyung Sik Yoo),박창윤(Chang Yun Park),오세정(Sei Jung Oh),이소진(So Jin Lee) 대한핵의학회 1992 핵의학 분자영상 Vol.26 No.2
N/A Pheochromocytomas are catecholamine producing tumors of neuroectodermal origin. Diagnosis of pheochromocytoma is significant due to potentially curable hypertension. But they have a significant associated morbidity due to uncontrolled hypertension and mortality since 10% are malignant. From Aug. 1989 to Jul. 1992, 12 patients of our institution had 131I-MIBG scan during work up of suspected primary or recurrent pheochromocytoma. In our studies conclude that 131I-MIBG scan is recommended as the initial localizing study of choice (especially for the detection of extraadrenal disease and postoperative recurrence) as a guide for CT and/or MR and specific functional confirmation of their findings.
원발성 간암의 67Ga Scan 소견 ; 혈관조영술 소견과의 비교
유형식(Hyung Sik Yoo),이종태(Jong Tae Lee),박창윤(Chang Yun Park),서정호(Jung Ho Suh),김명준(Myung Joon Kim) 대한핵의학회 1989 핵의학 분자영상 Vol.23 No.1
N/A The relationship between angiographic findings and those of 67Ga scan was evaluated in 30 patients with primary hepatocellular carcinoma diagnosed by either pathological examination or laboratory, radiologic findings. Twenty-three cases revealed hot activities on 67Ga scan and definite tumor stains on angiography. Main findings of 67Ga scans of 7 cases were isoactivity in 5 and cold area in 2, 5 of which revealed faint or no tumor stain on angiography. Cold areas within the primary hepatocellular carcinoma were noted in 9 cases by 67Ga scan. In 6 cases these were due to tumor necrosis. Remaining 3 cases had arterioportal shunt, portal vein thrombosis and one had necrosis as well. These results indicate that gallium uptake of primary hepatocelluar carcinoma seems to be relatively correlated with tumor stains on angiography. It is well known that the necrotic portion of primary hepatocellular carcinoma does not uptake gallium and it's the main cause of cold areas on 67Ga scan. And we suspect that the hemodynamic changes of primary hepatocellular carcinoma such as 1arge arterioportal shunt, portal vein thromosis may cause the decreased activity on 67Ga scan.