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반응합성용탕단조법에 의해 제조된 Fe-Al 계 금속간화합물 / Al 기지 복합재료의 마모특성
신왕식,최답천 ( Wang Shik Shin,Dap Chun Choi ) 한국주조공학회 1996 한국주조공학회지 Vol.16 No.4
N/A Wear behavior of AC4C and 4 composites under dry condition has been investigated with variations of applied pressure and sliding velocity at the room temperature. Wear volume loss was measured and worn surfaces, its cross sectional views and wear debris were observed to characterize the properties and the wear mechanism of AC4C and 4 composites. Results showed that AC4C and 2 composites fabricated with mixed powder of Al-10, and 20wt%Fe were observed mechanically severe wear, but Al-30, 40wt%Fe did stable wear pattern in the change of wear volume loss on the variation of contact pressure and sliding velocity. The behavior of wear is the transition from mild to severe wear accompanied by surface-layer removal as a result of melting Al matrix because of friction heat at the localized spot between specimen and counterface.
반응합성용탕단조법에 의해 제조된 Fe-Al 계 금속간화합물 / Al 기지 복합재료의 제조조건과 미세조직
신왕식,원창환,최답천 ( Wang Shik Shin,Chang Hwan Won,Dap Chun Choi ) 한국주조공학회 1996 한국주조공학회지 Vol.16 No.3
N/A The IMC/Al alloy matrix composites were prepared by reaction synthesis between Fe and Al using Fe powder or Fe-Al mixed powder. For the composites fabricated with AC4C melts and Fe powder, when the particle size of Fe powder was -100+140mesh and -230+270mesh, and the mold and melt temperature were 400℃ and 680℃, respectively, but in the case of lower particle size(-325mesh) of Fe, the mold temperature of 450℃ and the melt temperature of 610℃ were observed. For the composites prepared with mixed powder of -325mesh Fe and Al powders, the optimum process condition was the mold temperature of 650℃ and the melt temperature of 610℃. The amount of reaction products at the interface between matrix and particles increased with decreasing particle size of Fe powder for the composites fabricated with Fe powders, while it decreased with decreasing the amount of Fe for the composites made with -325mesh Fe-Al mixed powder. The fine Al-Fe binary intermetallic compound(<-10㎛) was observed for the composite fabricated with mixed powder of Al-10wt%Fe.
申王植 ( Shin Wang-sik ) 한국소년정책학회 2003 少年保護硏究 Vol.- No.6
More and more countries today are moving away from its former passive position of retaliatory penalty in punishing offenders and instead exercising constructive measures aimed to rehabilitate or reform criminals before reintegrating them back into the community. However, the same is true for US and several countries favoring punishment-based paradigm founded on conventional doctrine, which triggered caustic remarks from advocates of the unconventional school. They argue that the waning of humanism and decline of social justice are consequences of the widespread practice of excessive enforcement of severe punishment policy, prolonged confinement and prison programs that serve the purpose of lightening the burden of the warden's job responsibilities rather than de facto rehabilitation. Since 1989, Korea has changed its course from imprisonment philosophy and joined the international transition to probation system designed to constructively aid the re-integration of the offender back into the society. The probation system serves as the main means of administrating to criminal within societal boundary during the past 15 years. While the probation system has developed substantially over the years as the mainstay of criminal policy in Korea, I have found the operational aspects of the system and its legal foundation riddled with many loopholes, which, unless corrected of these defects, could lead to its breakdown.
서대규,신왕식,한길성,황기석,정재근 대한내과학회 1995 대한내과학회지 Vol.49 No.6
The authors report the two cases about spontaneous remission of acute myelogenous leukemia developed after severe infection with brief review of leterature. The one case was that of a 31-year-old female admitted with acute myelogenous leukemia and orbital cellulitis, and the other case was that of a 25-year-old female admitted with acute myelogenous leukemia and pneumonia. In those two cases, we delayed chemotherapy because of severe infection. After that, we nuexpectedly could observe the spontaneous remission of acute leukemia. The two patients respectively had a short duration of remission for 6 weeks and 5 months.
김지희,안기성,신왕식,서대규,한길성,정재군 대한신장학회 1995 Kidney Research and Clinical Practice Vol.14 No.4
Bentazon was developed as herbicide in 1968. Toxic effect of bentazon was reported predominantly in respiratory system, suppression of CNS and immunologic system in animal model. We report 39 year-old male patient with liver cirrhosis who eventually developed azotemia after ingestion of Bentazon for suicide. A day after ingestion of 800 mg/Kg of bentazon, azotemia was developed and then aggravated following 2days. 7days after ingestion, his plasma creatinine level retums to normal(1.2 mg/dL). During the course of renal failure his urine output was about 1000cc per day and fractional excretion of Na(FENa) below 1%. We conclude that a large amount of bentazon may cause acute renal failure, and present intrarenal vasoconstriction as possible mechanism of renal failure because there was no active sediment or protein in patients urine during the course of azotemia.
췌장미부 절제술로 완치된 성인에서 발생한 국소형 Nesidioblastosis 1 예
김용진,박재복,안기성,손호상,서대규,신왕식,한길성,정재군,오훈규 대한내분비학회 1995 Endocrinology and metabolism Vol.10 No.2
Nesidioblastosis, the process of differentiation of pancreatic islets from ductular epithelium, is a frequent cause of hyperinsulinemic hypoglycemia in neonates and infants, but rare in adults. A 38-year-old man had suffered from intermittent hypoglycemic symtoms for 10 years. He had inappropriately elevated plasma immunoreactive insulin level and I/G ratio during a prolonged fast. There was no evidence of tumor on the abdominal CT scan and operation although celiac angiography showed a round mass like lesion in the distal pancreatic area. His hypoglycemic symptoms were improved by distal pancreatectomy. Pathologic finding in the resected pancreas was that of focal type nesidioblastosis I.e, increased size and number of islets with scattered numerous small islets around ductules in focal lesion. Distal pancreatectomy as an initial operation may be effective in the treatment of focal type nesidioblastosis(J Kor Soc Endocrinol 10: 136-141, 1995).
성인 상부위장관 질환군에서의 H . pylori 검출에 이용되는 검사법의 상호비교
한길성(Gil Sung Han),서대규(Dae Gyu Seo),신왕식(Wang Sik Shin),정재군(Jae Gun Jung),손호상(Ho Sang Shon),최정윤(Jung Yoon Choe),안기성(Ki Sung Ahn),배정동(Jung Dong Bae),박재복(Jae Bok Park),강민모(Min Mo Kang) 대한소화기학회 1996 대한소화기학회지 Vol.28 No.1
N/A Background/Aims: For the evaluation of recent reports that H. pylori infection plays a causative ro1e in the pathogenesis of upper gastrointestinal diseases, we studied the relationship between the presence of H. pylori infection in patient and asymptomatic volunteer groups, using histologic demonstration of the bacteria, CLO test, and serum H. pylori antibody titer. Calculation of sensitivity, specificity, and predictive value of CLO test and antibody detection rate in relation to histologic demonstration were also performed. Methods: We evaluated the detection rate of H. pylori infection by direct demonstration with special stain, CLO test, and IgG antibody titer by EIA method in 80 symptomatiq patients who were categorized by endoscopic findings into 24 patients with chronic gastritis, 22 patients with gastric ulcer, 20 patients with duodenal ulcer, 14 patients with gastric cancer, and 20 asymptomatic volunteers. Four or more biopsy specimens of gastric and duodenal mucosa were taken from each of the total 100 cases with gastrofibroscopy and then blood samples were also taken. Results: In sections stained by Warthin-Starry method, H. pylori was found 62.5% in the 80 patients group and 30.0% in the 20 asymptomatic volunteers group. The prevalence of H. pylori was the highest in gastric cancer group(71.4%). The prevalence of H. pylori in the patients with peptic ulcer and gastric cancer was significantly higher than the asymptomatic volunteer group(p0.05). Positive CLO test in the patient group was 77.5% and 35.0% in the 20 asymptomatic volunteers group. The positive rate was the highest in gastric cancer group. The positive rate of the CLO test in patients with peptic ulcer and gastric cancer groups was significantly higher than the asymptomatic volunteer group(p0.05). The positive rate of IgG antibody test in the patient group was 82.5% and 45% in the 20 asymptomatic volunteer group. The rate of positivity was the highest in duodenal ulcer group. The positive rate of the serum IgG antibody test in all patient groups was significantly higher than asymptomatic volunteer group(p 0.05). Sensitivity and specificity of CLO test and IgG antibody test in relation to direct H. pylori smear was 94.6%, 76.7%, 96.4%, and 53.47o respectively. Conclusions: The positive rate of the H. pylori infection in patients with peptic ulcer and gastric cancer groups was significantly elevated compared with control and chronic gastritis groups for each of the 3 tests. For clinical purpose, CLO test can be used as a single guide for the treatment of H. pylori infection for its rapidity and efficacy. (Korean J Gastroenterol 1996;28: 19 - 27)