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정동원,김귀식 濟州大學校 産業技術硏究所 1998 산업기술연구소논문집 Vol.9 No.2
Finite Element Method is applied to the determination of the deformed bulge profile and strain distribution during upset forming of cylindrical billets. From the results of simulation. The bulging along the z-axis becomes more severe with increasing height reduction and with increasing friction at the die-material interface. The present method can be used for the simple prediction of the deformed shape and strain distribution in upset forging of cylindrical billets with dissimilar frictional conditions at the die-material interfaces.
장성종,김병수,부귀범,김동규,박찬국,김만우,김정용,박상헌 조선대학교 부설 의학연구소 2000 The Medical Journal of Chosun University Vol.25 No.1
Pancreatic pseudocysts usually develop as a complication of acute pancreatitis or repeated attacks of chronic pancreatitis. Pseudocysts may also develop as a result of traumatic injuries or neoplasms. An uncommon complication is massive hemorrhage inside the pancreatic pseudocyst. The exact mechanism of hemorrhage is unknown. Enzymatic digestion, pressure erosion from the cyst mass or a combination of these processes may play an important role. Gastrointestinal hemorrhage associated with a pancreatic pseudocyst can occur in 10 percent of cases. When hemorrhage occurs because of erosion into a blood vessel involved in the pseudocyst, surgery is indicated since the episodes of hemorrhage are often severe and may even be fatal. When there is colonic involvement, various complications may occur. The most dangerous one is spontaneous rupture into the colon, which requires immediate surgical treatment because of high incidence of fulminating sepsis or massive hemorrhage. We examined a sixty eight-year-old man complaining of hematochezia and dizziness, and reported that it was a case of massive lower gastrointestinal hemorrhage caused by pseudocyst of the pancreas ruptured into the colon associated with chronic pancreatitis. On operative findings, the peripancreatic fatty tissue had severe adhesions to transverse colon and tail portion of pancreas, where the pseudocyst had formed. A distal pancreatectomy, splenectomy and resection of transverse colon were performed. By microscopic examination, hemorrhagic necrosis and inflammatory change were observed in the pancreas specimen. The tail portion of pancreas had a 6×6 cm sized cystic mass and was proven to be a pseudocyst with no epithelial lining.
권병철,권경우,김기길,명태식,박찬호,박귀용 한밭대학교 산업과학기술연구소 1995 논문집 Vol.3 No.-
This paper is to be illustrated automation in the design of Pumping Station and Draining Station. Program for design automation applying Auto LISP, DCL can be used to design and draw simultaneously. The study result are as follows. 1. Optimal design has been introduced and precise design has been possible using CAD. 2. Dialog design is possible with introduction the concept of design automation, and design cost can be reduced greatly.
The Effects of Tannic Acid to the Cadmium on Mouse
Pan Gyi Kim,Ryoung Me Ahn,Seong Hee Hwang 한국식품위생안전성학회 1998 한국식품위생안전성학회지 Vol.13 No.2
Tannic acid(0.5 ㎎/㎖, 1.0 ㎎/㎖ , 2.0 ㎎/㎖)와 카드뮴(20 ㎎/㎏)을 마우스에 경구투여한 결과는 다음과 같다. 1. Tannic acid와 카드뮴을 투여한 마우스의 증체량과 음수소비량에 변화가 있었으나, 카드뮴투여에 의한 변화는 tannic acid투여에 의하여 감소되었다. 2. 카드뮴투여에 의하여 간장의 상대중량과 뇌 상대중량이 대조군에 비하여 유의한 변화가 있었으며, tannic acid 1.0 ㎎/㎖투여군에서는 간장의 상대중량, 폐장의 상대중량, 흉선의 상대중량도 유의하게 변화하였다(P<0.05). 3. Hemoglobin contents, packed cell volume, platelet count, neutrophill count등의 혈액학적인 변화는 대조군에 비하여 카드뮴투여군에서 유의한 변화가 인정되었다. 그러나, 이러한 유의한 변화가 tannic acid를 동시 투여한 군에서는 나타나지 않았다. 4. 카드뮴을 투여한 군에서는 혈청학적 변화(ALT, AST, BUN와 creatinine)가 있었으나 tannic acid 0.5, 1.0, 2.0 ㎎/㎖을 동시투여한 군에서는 회복되는 경향이 나타났다. 위의 결과로 미루어 카드뮴 투여에 의한 독성이 tannic acid을 2.0 ㎎/㎖/day 이상 4주간 투여하였을 때 경감효과가 나타날 수 있었다. 그러나, 카드뮴과 같은 중금속의 독성에 tannic acid가 어떻게 경감효과를 나타내는지에 관한 작용기전의 연구가 더 필요할 것으로 사료된다. The tannic acid (0.5 mglml, 1.0 mgld, 2.0 mglml) and/or cadmium (20 mgikg) were administered by oral administration. The results were as follows : 1. There were adverse effects on the weight changes and water consumption. But, the extent of adverse changes were decreased by tannic acid administration. 2. Also, there were some significant changes in organ weight, especially relative liver weight and relative brain weight by cadmium administration, but Tal.0 group was significant changes in relative liver weight, relative lung weight and relative thymus weight compared with control group. 3. In the hematological patterns of administered mice, there were significant changes between cadmium treated groups and control group. Hemoglobin contents, packed cell volume, platelet count and neutrophill count were significantly change compared with control group. These changes were not shown in tannic acid treated group. 4. There were serological enzymatic changes in the cadmium treated mouse. In the tannic acid treated group 0.5, 1.0, 2.0 mglml, ALT, AST, BUN and creatinine were recovered to the extent of control group. From the above results, the tannic acid has some possible alleviative effects of cadmium toxicity upto the 2.0 mgimllday of oral dose for 4 weeks. But we need further study of mechanism for toxicty alleviating action of tannic acid to the heavy metals like cadmium.