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왕창범(Wang Chang-Bum),송두호(Song Doo-Ho),박용복(Park, Yong-Bok) 한국산학기술학회 2006 한국산학기술학회논문지 Vol.7 No.3
본 논문에서 HDPE 관의 일체형 TEE성형 공정은 강소성 유한요소 해석 프로그램인 DEFORM-3D를 이용하여 해석을 하였다. 이중 보온관에서 외관으로 사용되는 HDPE 관은 관을 통하여 흐르는 온수의 온도를 유지하기 위한 관으로, TEE는 주관에 가지관을 연결하여 열의 수송방향을 바꾸는 역할을 한다. TEE제작에 압출 용접(Extrusion Welding)을 사용하는 기존의 방법으로는 이음부에서 강도가 취약한 문제점이 발생하기 때문에 HDPE 관을 성형시켜 TEE 형태로 일체화시킨 후에 맞대기 용접(Butt Welding)을 하는 방식을 제안하였다. 열간과 냉간 성형 실험을 실시하였고, 초기 구멍 형태에 따른 모델 파라미터가 강소성 유한요소해석에 의해 규명되어 졌으며, 이는 실제의 제품 제조 공정에 적용되어 졌다. TEE Forming process for HDPE(High Density PolyEthylen) pipe has been analyzed by using rigid plastic finite element code, DEFORM-3D. TEE of HDPE pipes is necessary to connect main pipe with branch pipe and change the flow direction of hot water. A HDPE pipe is used as a insulator to maintain the temperature of hot water. A butt welding process through TEE forming for a HDPE pipe is a updated process improving the strength of welding part compared to conventional extrusion welding process. The Experiment of Hot and Cold Forming have been performed. The design parameters such as a initial hole shape have been obtained through rigid-plastic finite element analysis, which is applied to the actual manufacturing process.
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宋斗灝 최신의학사 1967 最新醫學 Vol.10 No.5
Though low back pain and radiating leg pain carry little threat to life, they may interfere greatly with living. Their frequency and their causes of suffering, and disability have been a constant stimulus to- investigation. . Rupture of the annulus fibrosus of the lumbar intervertebral disc with herniation of the nucleus pulposus is a common cause of low back pain with or without radiating leg pain which was not well recognized until the contribution of Mixter and Barr in 1934. Now after approximately 30 years of investigation, there is still great diversity of opinion concerning diagnostic criteria, methods of treatment and results obtained by various methods of treatment. The purpose of this investigation is to analyze the clinical findings based on 651 Korean patients treated by excision of the herniated nucleus pulposus at the Seoul National University Hospital between September 1, 1957 and August 31, 1966. In this series the criteria for operative intervention were: (1) the only absolute indication for immediate surgery was the sudden appearance of severe neurologic disturbance such as sphincter disturbance as well as weakness and severe pain in one or both legs; (2) the bedridden patients who was completely disabled by low back pain and whose leg pain recurres with every attempt at ambulation (3) failure of the pain to improve, in spite of adequate conservative treatment, and the clinical history and neurologic findings were clear cut; (4) if Peyton's sign (contralateral pain) was positive in addition to other neurologic findings; and (5) the presence of muscle atrophy involving leg or gluteal muscles with other neurologic signs. The surgical technique was standard. Under general anesthesia, if the patient was apprehensive or restless, or spinal anesthesia, the patient was placed in the prone position with the table flexed in order to open the interlaminal space. Removal of ligamentum flavum and minimal removal of bone from the y i . laminae was usual method to expose the herniated nucleus pulposus. After decompression of the root by removal of the herniated portion of the disc, remaining nucleus pulposus was also completely removed as possible as, and closed the wound. There were 428 males (65.7 per cent.) and 223 females (34.3 per cent.). The males were affected about twice as often as females. The youngest patient was aged seventeen years and the oldest seventy years. The majority of cases were between the ages of 21 and 40 years (62.7 per cent.). In male the highest
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박용복,송두호 朝鮮大學校 機械技術硏究所 2004 機械技術硏究 Vol.7 No.2
고밀도 폴리에틸렌(HDPE) 파이프 중 TEE 성형 공정이 강소석 유한요소해석 툴인 DEFORM을 이용하여 해석되었다. 많은 HDPE 파이프 중 TEE는 주관을 가지관과 연결하여 온수의 유동방향을 변화시키는데 사용된다. HDPE 파이프는 온수의 온도를 유지하기 위한 절연재로서 사용된다. HDPE 파이프에 대한 TEE 성형과 맞대기 용접 공정은 기존의 압출용접 공정에 비해 용접부의 강도를 향상시키는 개성된 공정이다. 초기의 구멍 형상과 같은 설계 인자들이 실험과 해석을 통하여 얻어졌고, 실제 제조공정에 적용되었다. TEE forming process on HDPE(High Density PolyEthylen) pipe has been analyzed by using rigid plastic finite element analysis code. DEFORM. TEE of HDPE pipes is necessary to connect a main pipe with a branch pipe and change the flow direction of hot water. A HDPE pipe is used as insulator to maintain the temperature of hot water. TEE forming and butt welding process on a HDPE pipe is a updated process improving the strength of welding part compared to conventional extrusion welding process. The design parameters, such as an initial hole, shape have been obtained from the experiment and rigid-plastic finite element analysis, which is applied to the actual manufacturing process.
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秦柄鎬,宋斗灝,황훈 최신의학사 1959 最新醫學 Vol.2 No.1
We observed the clinical effects on malignant tumor patients produced by administration of chemotherapeutic agents such as nitromin, TEM, Azan, Methylcholantherene and Cholesterol methylether respectively. Patients were almost inoperable and results was obtained as follow; ' Nitromin We found marked regression of tumor mass, diminution of pain,and improvement of the general co' ndition was produced by administration of Nitromin in cases of-Hodgkins' disease and malignant lymphoma. In this ;group, remarkable effects were obtained by. simultaneous' X-ray irradiation or administration of cortisone. However, it should be pointed out that the leucopenia becomes progressively worse with this combined. therapy even when Nitromin had been disconti-. nued. In one patient with lymphosarcoma and one with endothelioma,. Nitromin had a temporary growth inhibitory effect on the` tumor. However; recurrent -tumors were never improved by redministration of Nitromin. In .13 cases of cancer made up as follows, 4 cases of stomach cancer, one of each liver cancer, neck cancer, thyroid cancer, lung. cancer, tongue cancer, cecum cancer, metastatic bone cancer, we could not find any improvement except slight release of pain produced by', admninistration of Nitromin. In one case of lip cancer, the tumor mass was slightly diminished. One case of endothelioma showed also marked regression of 'tumor mass, but recurrence followed 2 mo- nthes later. Alsowe could not find any improvement incases of gastric, cancer. TEM Noticeable effect was found in one case of endo- thelioma, but no effects in 2 cases of gastric cancer. Azan No effect was. fond in one case of gastric cancer, one case of breast cancer and one case'of osteosarco ma. _ 3-Methyleholathrene In one case of recurred sem inoma with lymphatic. metastasis, severe pain and other symptoms subsided on the . second day after administration of 3-Methylcholanterene, and after 9 days regression of the tumor mass began reaching half its original size when 600 mg had been administered. Eventually it reached to very small size by X-ray irradiaton, that could not be palpated. Atter that the remaing Iymphglands were removed by operative procedure. Cholesterol-methylether,Estradioll-3-methylether and cholesterol-3-methylether showed marked inhibitory action on N.F. Sarcoma and Ehrlich's ascites cancer of mice, as we reported previously. ` At first, we were trying to investigate clinically -its effect. so cholester-01-3-methylether in oil were injected intramuscularly in cancer patients; one of lung metastasis in male breast cancer, one of prostate cancer, one of female breast cancer, one of skin cancer. In former 3 cases, we . found marked improvement, but in the latter s-kin cancer no effect was found. We expect more potential anticancer action to estrad iol 3-methylether in clinic too. We are now investigating the mechanism of the anticancer action of this steroid and other steroid compounds. According to the above results, chemotherapy alone. could not completely solve the problem of malignant tumors, but the chemotherapeutic treatment has a significant position as an auxiliary. treatment to radical operative procedure of malignant tumor combined with X-ray therapy.
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