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졸-겔법으로 합성된 폴리이미드/실리카 복합체의 환경적 물성에 관한 연구
박성수,홍성수,이성환,김성완,박재현,김지경,박희찬 한국환경과학회 2003 한국환경과학회지 Vol.12 No.4
Two types of polyimide/silica composite films were prepared using sol-gel method through hydrolysis and polycondensation of tetraethoxsilane(TEOS) with the polyamic acid(PAA) and end-capped PAA solution. Sample were characterized by the means of differential thermogravimetry, X-ray diffractometry, scanning electron microscopy, universal test, impedance analyzer, chemical resistance test, etc. All of the PAA/silanol solutions heat-treated at 300℃ for 6h were transformed to polyimide/silica composites. It has been demonstrated that the properties of polyimide/silica composites were affected by the amount of silica addition and the bond type existed between polyimide and silica.
류완호,이원묵,박성하,양천회 한밭대학교 에너지청정기술연구소 2004 에너지청정기술논문집 Vol.4 No.1
국내 석탄화력 발전소에서 폐기되는 석탄회를 이용하여 폐수 중 암모니아성 질소 제거용 흡착제를 제조하고자 NaOH를 반응물로 한 수열합성 반응을 이용, 제올라이트를 합성하였으며 제조된 제올라이트를 실제공정에 활용하기 위하여 흡착실험 및 공정모사를 수행하였다. 또한 흡착제를 구형으로 제조하여 암모니아성 질소의 등온 흡착 공정에 이용하였으며 이 결과 Langmuir, Freundlich 및 Sips 식에 잘 일치함을 알 수 있었다. 고정층에서의 흡착 거동은 축 방향 분산흐름, 입자 내부에서의 표면확산 및 Sips 흡착 등온식을 바탕으로 한 고정층 흡착 모델의 주요 공정 변수에 대한 파과곡선을 잘 모사할 수 있음을 확인할 수 있었다. Zeolite was synthesized from coal fly ash produced by a domestic power plant and applied for the removal of ammonia from waste water. Zeolite was synthezied using a hydrothermal method involving an akaline reaction with NaOH, and adsorption experiments and simulations were performed with the pellectized zeolite. The experimental data obtained from adsorption isotherms were consistent with the Langmuir, Freundlich and Sips equation. Also, most of the correlated results for the fixed bed model based on surface diffusion and Sips adsorption isotherms equation were consistent with the experimental data.
김성완,윤철종,최성우,김성우,우성훈,신남철,박승조 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.2
We have investigated a performance of bio-electrode reactor for removal of nutrient like a nitrogen, phosphorus and organic substrate. Lab scale of bio-electrode reactor was operated with synthetic and tannery wastewater. Iron bar and stainless steel used for anode and cathode respectively. In experiment with synthetic wastewater, we were able to obtain the optimal current density range of 2.4-40 mA/dm² after 48 hrs operating time. And in that experiment, about 70~73% of ammonia nitrogen and 54~64% of phosphorus were removed. In experiment with tannery wastewater at 2.4-4.0 mA/dm², the removal rate of ammonia nitrogen, phosphorus and organic substract were about 62-69%, 45~59% and beyond 79% respectively.
金成完,成瓚鏞 충남대학교 농업과학연구소 1978 農業技術硏究報告 Vol.5 No.2
Comparative studies have been carried out to elucidate effects of 3 types of Japanese hardening agents and cement on the compressive and tensil strength of solidified briquette ashes with different ages, when various mixing ratio were applied. 1. The hardening agent, especially type C, were appeared to be better than the cement to obtain higher compressive and tensil strength of the products. 2. The compressive strength when mixing ratio of 1 : 3 applied were : 177.6kg/㎠ for type C; 168.6kg/㎠ for type A; and 155.94kg/㎠ for type B. 3. The tensil strength when mixing ratio of 1 : 3 applied were : 24.63kg/㎠ for type C; 23.14kg/㎠ for type B; and 22.45kg/㎠ for type A. 4. Although the solidified briquette ashes were found to be not as strong as cement mortar, it is considered that they could be used instead of low-strength concrete, and that they could contribute to reduce the amount of terminal city-wastes then to reduce pollutions caused by the wastes.
Diffuse Large B-cell Lymphomas의 예후인자로서의 혈청 β2-microglobulin
어완규,신성훈 KOSIN UNIVERSITY COLLEGE OF MEDICINE 2006 高神大學校 醫學部 論文集 Vol.21 No.1
Background: This study was undertaken to see whether serum β2-microglobulin (B2M) could be used as a prognostic factor or not in patients with previously untreated diffuse large B-cell lymphoma (DLBCL). Methods: One hundred and forty-six consecutive patients with previously untreated DLBCL were participated in this study between 1995 and 2004. Serum B2M was measured by a radioimmunoassay in pretreatment serum samples of patients with DLBCL. Patients were then treated with CHOP or equivalent regimens with or without radiotherapy. Results: Serum B2M was available in 127 out of 146 patients enrolled. The median age was 54 years (15-80). Serum B2M levels greater than 2.5 mg/L were found in 27/127 (21.3%) patients. Higher serum levels were associated with old age, high serum LDH, poor performance status, increased number of extranodal site(s), advanced stage, constitutional symptom, bone marrow involvement, and high International Prognostic Index (P=0.001, 0.000, 0.000. 0.024, 0.000, 0.010, 0.040, and 0.000, respectively). The complete response rate was 40.7% vs. 68.0% for patients with serum B2M levels greater than 2.5 mg/L vs. control (P=0.010). The median overall survival was 11 months vs. 74 months for patients with serum B2M levels greater than 2.5 mg/L vs. control (P=0.0000). Conclusions: Serum B2M level was a good predictor of complete response and overall survival in patients with previously untreated DLBCL and could be used as a prognostic factor.
충남대학교 부속동물병원에 의뢰된 개의 뇨결석 성분 분석 결과
노경완,송근호,조종기,박성준 忠南大學校 獸醫科大學 動物醫科學硏究所 2005 動物醫科學硏究誌 Vol.13 No.-
A retrospective analysis was performed with 14 cases of canine urolithiasis examined at Laboratory of Clinical Pathology, College of Veterinary Medicine, Chungnam National University in the period between January 2005 and November 2005. The female (8 cases) had most occurrence about 14 cases. The Shih-tzu (8 cases), Poodle (4 cases) had higher incidences than other breeds. Canine urolithiasis occurred from 1 year 3 months to 7 years 6 months, but the most prevalence age was 3 years. The major mineral component of calculi was calcium oxalate (64.28%) and struvite(21.44%).
남성열,유석인,박완근,한상섭 강원대학교 삼림과학연구소 2000 Journal of Forest Science Vol.16 No.-
본 연구는 오대산 국립공원내 월정사지역에 분포하고 있는 전나무림의 식생구조를 분석하여 이 지역 전나무림의 관리에 대한 기초자료를 제공하기 위하여 수행되었다. 그 결과 전나무림의 층위구조는 교목층(2종류), 아교목층(20종류), 관목층(46종류) 그리고 초본층(87종류)으로 구성되어 있었다. 조사지역에 출현한 전체식물의 중요치는 전나무가 34.09%로 가장 높게 나타났고, 당단풍(23.07%), 청시닥나무(14.44%), 고광나무(10.72%), 오리방풀(8.49%), 복자기(7.80%), 고추나무(7.65%), 산거울(6.79%), 방아풀(5.76%), 고로쇠나무(5.47%), 개다래(5.41%)의 순으로 나타났다. 특히, 전나무의 치수가 전혀 없어 앞으로 아교목층과 관목층을 형성하고 있는 단풍나무류, 참나무류, 피나무류 등의 경쟁에 의하여 천이가 있을 것으로 사료된다. The vegetation structure of Abies holophylla forest was analyzed to provide the information for conservation of Abies holophylla at Wol-jong Temple in Mt. Odae national park, southern Korea. The layer structure of Abiesholophylla forest was consists of tree layer(2 species), subtree layer(20 species), shrub layer(46 species) and herb layer(87 species). The importance value of Abies holophylla was the highest one 34.09% , and those of Acer pseudo-siebodianum, Acer barbinerve, Philadelphus schrenckii, Isodon excisus, Acer triflorum, Staphylea bumalda, Carex humilis, Isodon japonicus, Acer monp and Actinidia polygama were 23.07%, 14.44%, 10.72%, 8.49%, 7.80%, 7.65%, 6.79%, 5.76%, 5.47% and 5.41%, respectivery. Especially, when predicting succession in Abies holophylla forest, such seedlings were not formed and succession was governed by competition of Acer species, Quercus species and Tilia species of subtree and shrub layer. Key words : Abies holophylla forest, importance value, Wol-jong Temple
홍성수,한정완 한국디자인과학학회 1998 디자인과학연구 Vol.1 No.-
디자인에서의 인간공학의 활용은 그동안 대단히 무질서하고, 난잡하게 적용되었다. 이것은 아직까지 디자인이 미술적 재능이나 경험적, 감각적인 재능의 부산물로 인식되기 때문에 이 시점에서 디자이너는 인간공학 도입의 본래의 취지에 맞게 디자인을 객관적, 정량적인 방법으로 수행해야 할 것이다. 따라서 본 연구는 EMG 시스템을 이용하여 Hand-Drill의 손잡형태가 팔근육에 미치는 영향에 대한 가설을 통하며 Hand-Drill디자인시 보다 객관적인 인간공학적 접근방법을 모색하고 적정각도 및 굵기를 정량적으로 제시하고자 한다. 이를 위해 5명의 신체 건강한 20대 피실험자을 대상으로 Hand-Drill 손잡이 각도 굵기를 독립변수, 팔근육에 미치는 힘을 종속변수로 설정하여 Hand-Drill의 각도와 굵기가 팔근육에 미치는 영향에 대해 조사 분석하였다. 측정된 자료를 통계분석한 결과 각도 0°, 굵기 2.56cm일 때 근육에 미치는 힘이 적게 나타났다. 본 연구의 결과는 제품디자인에 있어서 EMG 신호를 이용하여 각 형태를 인간공학적 방법으로 정량화 하였고, Hand-Drill 디자인에 있어 각도와 굵기에 대한 추천지로 제안 될 수 있다고 본다. 추후에는 진동, 단면적 형태, 무게 등의 독립변수 요인을 추가 확대하여 Hand-Drill 디자인에 응용한다면 더욱 유용하리라 생각된다. Human Factor, a practical science that is an application fields, has been employed and used in industrial importance. But we limited Human Factor on anthrome design work, and have used it as sensible data only. It is necessary that scientific, quantitized and responsib be applied in industrial design. In this paper, I propos design process can be used in EMG system of biom Human Factor with responsible and quantitized characteristics of EMG system is described and the cap application of EMG system of industrial design is pre-experiment. I applied this result to joystick leve hydraulic excavator. In this paper, 1 emphasize that objective aid standa applied to EMG system experiment process and indu process integratively. And I suggest that systematic method be applied to H in industrial design.