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지용주,이상진,박후명,곽재섭,하만경 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-
A measure for good products manufactured by grinding process is the surface roughness that is affected by a lot of operating parameters such as types of abrasive, grain size, bond material, wheel speed, table speed, depth of cut, hardness of workpiece and stiffness of grinding machine. In this study, an application of the design of experiments was tried for evaluating the effect of operating parameters on the surface roughness. The workpiece was a high speed tool steel(SKH5I) and the surface grinding was conducted. In order to obtain the best surface roughness within constraints of the working range, the optimal grinding conditions were selected. The usefulness of this method was evaluated by the statistical strategy.
[논문]斜角을 고려한 곡선 Box Girder교의 거동에 관한 연구
박성진,이승훈,진치섭 釜山大學校生産技術硏究所 2003 生産技術硏究所論文集 Vol.62 No.-
일반적으로 국도상의 교량은 기존도로의 확장이나 주변지형의 영향 등을 많이 받기 때문에 기하학적 형상이 직선교보다 사교나 곡선교인 경우가 많다. 예를 들어, 고속도로 인터체인지 및 도심지 내의 입체교량 둥에서 교통의 흐름을 원활히 하기 위해서 곡선 교량이 본격적으로 설계 · 시공되고 있다. 또한 구조물의 현장조건에 따라서 사각(skew angles) 이 있는 곡선교의 시공이 불가피하게 되었다. 본 연구에서는 절판구조물로 구성된 단면형태를 가진 곡선교에서 사각의 크기 및 곡률변화에 따른 구조물의 거시적인 거동을 유한요소 범용 프로그램인 SAP2000을 사용하여 비교 · 분석하였다.
Lesch-Nyhan 증후군을 가진 소아의 체외충격파신쇄석술을 위한 전신마취 경험
박상진,권일치,이원기,이덕희 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.1
Lesch-Nyhan syndrome is an inborn error of purine metabolism resulting from hypoxanthine-guanine-phosphoribosyltransferase (HGPRT) deficiency and leading to excess purine production and uric acid over-production. It is a very rare X -linked recessive disorder, characterized by movement disorder, cognitive deficits, and self-injurious behavior. However, because of the high incidence of calculi, patients may present for surgery of urinary tract, and have increased risk of difficult intubation, aspiration pneumonia, renal insufficiency or sudden death. We report the case of a 5-year-old boy with Lesch-Nyhan syndrome who underwent successive extracorporeal shockwave lithotripsy under general anesthesia.
CdIn₂O₄-Electrolyte Junction의 광기전력 효과
박규은,최치규,홍성락 제주대학교 1984 논문집 Vol.17 No.-
CdIn_(2)0_(4) photoanodes of 1.0cm diameter and 2mm thickness were prepared by pressing the mixed powders of high purity CdO and In_(2)O_(3) with molar ratio 1.1. At 1,100℃, fied for 72 hours and at 800℃, annealed for 24 hours in O_(2) gas. The photoanode had both a high electrochemical stability m 1M Na_(2)HPO_(4), solution and a good photosenstivity. From their photalectrolysis, the flat band potential of the anode was -0.275 volt (V vs. SOE). The photovoltaic effect is observed in the wan-length range from 23Onm to 760nm and maximum photocurrent was 1.8mA/㎠ at 38Onm.
박준수,이성우,김상원,한치동 대한피부과학회 2004 大韓皮膚科學會誌 Vol.42 No.2
A 31-yeat old woman had been diagnosed as a metastatic melanoma of unknown origin 7 month before. Multiple cutaneous nodules had developed about 2 months before. When she visited our dermatologic clinic, the number of cutaneous nodules was increased and her urine was dark-brown colored. Histopathologically, the cutaneous nodule had typical for metastatic melanoma. After cytospin of her urine, we observed melanin dusts within macrophage on Fontana-Masson stain. This is a rare case showin-g melanuria. (Korean J Dermatol 2004;42(2):211~213)
박진용,주치언,김진욱,이상현,이재화 신라대학교 자연과학연구소 2006 自然科學論文集 Vol.15 No.-
Bacteriocins are antibacterial proteins produced by bacteria that kill or inhibit the growth of other bacteria. Many lactic acid bacteria produce a high diversity of different bacteriocins. Since food safety has become an increasingly important interantional concern, the application of antimicrobial peptides from lactic acid bacteria that target food pathogens without toxic or other adverse effects has received great attention. This article gives an overview of bacteriocin applications, and characteristics.
Mossbauer 분광법을 이용한 10MnO₂-10Fe₂O₃-30Na₂O-50SiO₂유리내의 Fe³+ 이온에 관한 연구
朴冠鎬,洪性樂,洪致裕,白承道 濟州大學校 基礎科學硏究所 1988 基礎科學硏究 Vol.1 No.1
We have studied the Mossbauer parameters for ?? ion in the quenched glass and heat treated glasses. The Mossbauer spectra of the quenched glass were investigated at various temperatures from 60K to 300K. Using the center shift and kinetic temperature, the Debye and Einstein temperatures were calculated. The quenched glass was heat-treated at various temperatures from 530℃ to 710℃ for five hours. Both the isomer shit and quadrupole splitting parameters decreased near 590℃. And regardless of heat treatment, the ?? ion was predominantly octahedrally coordinated.
박치영,모성환,문철호,곽재정,김태종,전용준,박유환,정춘해 朝鮮大學校 附設 醫學硏究所 1995 The Medical Journal of Chosun University Vol.20 No.2
von Willebrand's disease (vWD) is the most common autosomal-dominant inherited disorder resulting from a quantitative or a qualitative defect of von Willebrand factor (vWF). The most diagnostic pattern is the combination of a prolonged bleeding time, a reduction in plasma vWF concentration, a parallel reduction in ristocetin cofactor activity, and reduced factor Ⅷ activity, In this case, ristocetin-induced platelet aggregation data were compatible with that of vWD. Bleeding times were prolonged over 4 minutes, vWF antigen levels were 45%. vWF ristocetin cofactor activities were 0~1% and factor Ⅷ levels were 31%, when compared to the normal control. We report the case of a family with vWD. characterized by a quantitative defect in vWF
박상곤,김영대,강지은,신정현,신병철,박차영,정춘해 朝鮮大學校 附設 醫學硏究所 2003 The Medical Journal of Chosun University Vol.28 No.2
Rhabdomyolysis is a syndrome characterized by muscle necrosis and release of intracellular muscle constituents into the circulation. The spectrum of causes is quite broad and included disorders of traumatic, metabolic, infectious and toxic origin. However, rhabdomvolvsis and acute renal failure following bee sting is rare and its pathogenesis is not well known. We experienced a case of 63-year-old man with acute renal failure and rhabdomyolysis caused by bee sting. He was stung by bee on scalp and neck. Oliguria was developed within several hours. He has fully recovered after general supportive care including fluid therapy and diuretics. This case demonstrates that rhabdomvolysis with consequent acute renal failure are able to developed by bee sting.
박치영,강지은,박상곤,김상현,김형선,정춘해 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.2
Background: Autoimmune hemolytic anemia (AIHA) is a very uncommon disorder with the incidence between one and three cases per a hundred thousans a year. There have been very few studies about AIHA in Korea because of its low incidence. Most AIHA studies in Korea were about case history. The aim of this study was to review the clinical features, therapy and outcome of AIHA patients in single institution clinic. Methods: We reviewed retrospectively the medical records of AIHA patients from December 2002 to December 2006. Results: Twelve patient with AIHA were identified, and their median age was 49 years (range 27-75). Male to female ratio is 9:3. The median hemoglobin level was 5.0 g/㎗ (range 2.5-8.2). Warm type AIHA was most common (8/12), cold type was three, and mixed type was one. There was histories of associated disease in six patients. Two patients were complicated by systemic lupus erythematosus and mycoplasma infection and one patient by idiopathic myelofibrosis and solid tumor. Oral steroid was used as the first-line treatment in nine patients. An initial response was observed in eight patients with complete response. One patient had not responded to the initial steroid treatment, and then showed complete response with rituximab. Two relapsed patients were treated with rituximab and partial splenic embolization. Conclusion: The majority of patients can be treated with steroid. Rituximab can improve the response rate in relapsed and refractory AIHA.