인공신경망 이론에 의한 일유출량 예측

朴成天,文炳錫 東新大學校 工業技術硏究所 1999 工業技術硏究 Vol.5 No.-

The applicability of the system theoretic artificial neural network approach in developing effective nonlinear models of the rainfall-runoff process is demonstrated in this paper. The multi-layer networks, specially three-layer artificial neural networks have been used to model the rainfall-runoff process. And the data from the river Young-San has been utilized for the present study. This paper presents the potential of artificial neural network for simulating the hydrologic behavior of watersheds. The results of this paper suggest that the artificial neural network approach may provide a superior alternative to other methods of modeling for developing input-output simulation and forecasting models in situations that do not require modeling of the internal structure of the watershed.

급성 출혈성 대장염으로 오인된 궤양성 대장염 1예

문희정,장병익,김승범,이호찬,박재현,은종렬,김태년 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.2

Ulcerative colitis (UC) is a chronic inflammatory disorder of the gastrointestinal tract that affects the large bowel, Its etiology remains controversial. However, an infectious or immunologic origin is considered the primary cause. The onset of UC is typically slow and insidious, but some patients may present acutely with symptoms mimicking infectious colitis. We report a case of ulcerative colitis mimicking acute hemorrhagic colitis at initial presentation. A 60-year-old man was referred to Yeungnam University Hospital for bloody diarrhea and abdominal pain. Sigmoidoscopy revealed mildly edematous mucosa in the rectum and hyperemic mucosa with petechiae in the sigmoid colon. The patient was treated with antibiotics for several days, and his symptoms improved. However, after one month, his bloody diarrhea relapsed. Follow-up sigmoidoscopy revealed mucosal friability in the rectum and sigmoid colon. He was diagnosed with ulcerative colitis, and his symptoms were improved with mesalazine and a steroid enema.

유도발전기로 연계된 풍력발전시스템의 시뮬레이터 개발 및 연계 특성분석

朴用熙,韓炳文 명지대학교 산업기술연구소 2007 産業技術硏究所論文集 Vol.26 No.-

This paper proposes a model for variable-speed wind turbine using the real wind data, and a reactive power compensator for the interconnected wind power system using a new 36-pulse voltage source converter. The propose wind turbine model was developed through more practical approach considering wind characteristic, blade characteristic and blade inertia compensation. The proposed reactive-power compensator was developed using a new 36-pulse voltage source converter with DC auxiliary circuit. The operational feasibility of proposed wind turbine and reactive-power compensator were verified by computer simulations with PSCAD/EMTDC and experimental works with 2kVA hardware model

여성전문병원 병동부의 특성에 관한 건축계획적 연구

문병건,박재승 한국의료복지시설학회 2002 의료·복지 건축 Vol.8 No.2

Modern society gradually change into diversification and specialization, the field of medical service also is specialized in these days. According to changes, A medical institution stress the need of women's min space of the concept "Well Women Clinic" Therefore, this study aims to propose improve way and architectural data after analysis the developing circumstances and problem on the architectural planning on the ward of women's hospital by case studies on the ward of women's hospital builded recently in korea.

공초점레이저주사현미경을 이용한 심미수복재와 상아질의 접착계면에 관한 연구

박병철,조영곤,문주훈 대한치과보존학회 2000 Restorative Dentistry & Endodontics Vol.25 No.3

The purpose of this study was to evaluate on the interfacial morphology between dentin and restorative materials. In this in vitro study. the cavity wall reiterated with 3 different kinds of tooth colored restorative materials [resin-modified Glass monomer cement (Fuji Ⅱ LC) , composite resin (Z-100) , composer (Dyract)] . The thirty extracted human molar teeth without caries and/or restorations are used. The experimental teeth were randomly divided into three groups of ten teeth each. In each group, Wedge shaped cavities (width: 3mm. length: 2mm, depth: 1.5mm) were prepared at the cementoenamel junction on buccal and lingual surfaces. The adhesive of composite resin were mixed with rhodamine B. Primer of composite resin, Prime & Bond 2.1 of Dyract and liquid of Fuji Ⅱ LC were mixed with fluorescein. In group 1, the cavity wall was treatment with dentin conditioner, and then reiterated with Fuji Ⅱ LC. In group 2, the cavity wall was treatment with Prime & Bond 2.1 and then reiterated with Dyract. In group 3, the cavity wall was etching with 10% maleic acid, applied with primer and bonding agent and then reiterated with Z-100. The interface between dentin and restorative materials was observed by fluoresence imaging with a confocal laser scanning microscope. The results were as follows : 1.In Glass ionomer group, adaptation of resin modified Glass-ionomer restoration against cavity wall is tight, but the crack formed inside of restoration were observed. 2.In Dyract group, the penetration of resin tag is shorter and the width of hybrid layer is narrower than composite resin group. 3.In Z-100 group, primer penetrated deeply through dentinal tubule, Also bonding agent was penetrated along the primer, but the penetration length is shoater than primer part, and in 3-D image. the resin tag is conical shape and lateral branch is observed.

필름형 염료감응태양전지용 AZO 투명전도막의 개발

박병욱,성열문,추영배,곽동주 경성대학교 공학기술연구소 2008 공학기술연구지 Vol.15 No.-

Recently, much interest has been paid in using plastic materials for replacing glass substrates with increasing applications for large scale flexible flat panel display and flexible film-typed dye sensitized solar cell(DSCs) In particular, flexible film-typed dye sensitized solar cell(DSCs) has attracted much interest because it can be applied to a smart window, a wearable PC as a supplementary power supplier and a winter clothes In this paper ZnO:Al thin film, which serves as a transparent conducting layer, was deposited on the polyethylene terephthalate(PET) substrate by the capacitively coupled r. f. magnetron sputtering method The effect of r. f. discharge power on the morphological, electrical and optical properties of ZnO:Al thin film were studied The film deposited on the PET substrate at r. f. discharge power of above 200 W and gas pressure of 5mTorr showed the minimum resistivity of about 2×10-3 Ω-cm, a transmittance of about 87% and optical band gap of 3.56 eV.

발화기구의 정량적 해석을 위한 재현 실험 : 1차년도 전기화재 재현 Reconstruction for Electrical Fire

박남규,김상현,김진표,김윤희,문병선,조영진 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

백서에서 신 허혈성 손상에 미치는 칼슘 길항제의 효과

문철웅,정종훈,박천국,이승일,배학연,장경식,김만우,정춘해,홍순표,이병래,김호중 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Renal ischemia is one of the most common causes of acute renal failure. Four factors related to the pathogenesis of acute renal failure are vasoconstriction, decreased glomerular filtration rate, tubular back leak of filtrate, and intratubular obstruction. The cellular response to renal ischemic insults include decreased content of adenosine trihosphate, lipid peroxidation induced membrane degradation, alteration in cellular pH, and calcium or phospholipase induced mitochondrial dysfunction. Much attention has been given to the role of increased cellular calcium as a pathogenetic contributor to cell injury during ischemia. Author studied the protective effects of calcium antagonists on cellular injury during renal ischemia in rat. To investigate the protective role of these agents, author measured the amount of malondialdehyde(MDA) and the enzyme activities of free radical scarvengers-superoxide dismutase(SOD), catalase and glutathione peroxidase from non-pretreated group and calcium antagonists pretreated groups in control, ischemia and reflow subgroups. The results were summerized as follows: 1) The amount of MDA in non-pretreated group was higher in the reflow compared with the control(<p<0.01). But, in all pretreated groups, there was no statistically difference in the amount of MDA. 2) The SOD activity in non-pretreated group was lower in both the ischemia and the reflow compared with the control (P<0.05). But, in both verapamil and trifluoperazine-pretreated groups, there was no statistically difference in the SOD activity. 3) Both catalase and glutathione peroxidase activities in non-pretreated group were lower in both the ischemia and the reflow compared with the control (P<0.05). But in all pretreated groups, there was no statically difference in both catalase and glutathione peroxidase activities. These results suggest that free radical mediated ischemic injury by renal artery clamp in rat can be protected by intraperitoneal pretreatment with calcium antagonists. As trifluoperazine has a protective effect in renal ischemia, the calcium activated calmodulin dependent enzyme may play a role in renal ischemic injury.

Fractal 차원에 의한 표면경화면과 마찰면의 형태해석

문병주,조연상,옥철호,박흥식,전태옥 동아대학교 생산기술연구소 2001 生産技術硏究所硏究論文集 Vol.6 No.1

The determination of surface middleography is believed to be extremely important in the areas of contact mechanics, adhesion and friction. In order to describe middleography of various rubbed and hardened surface, the wear test was carried out under different experimental conditions in dry friction. And fractal descriptors was applied to rubbed and hardened surface of laser modified steel with image processing system. These descriptors to analyze surface structure are fractal dimension. Surface fractal dimension can be determined by sum of intensity difference of surface pixel. middleography of rubbed and hardened surface can be effectively obtained by fractal dimensions.

수입 외국산 모발세정용 화장품의 중금속 농도에 관한 연구

문정아,문덕환,박명희,안진홍,김종은,손병철,김대환,이창희,김휘동,이채언 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.5

Objective : For the purpose of preparing the fundamental data and preventing the health impairment due yo heavy metals in hair cleaner. Methods and Material : The author determined the concentration of heavy metals(Fb, fn, Cr, Ni and Cu) in hair cleaner with flameless atomic absorption spectrophotometer. Results : The results were as follows : 1. The mean concentration of heavy metals in total hair cleaner were 0.046㎍/g for Pt, 0.O67㎍/g for Mn, 0.069㎍/g for Cr, 0.046㎍/g for Ni, and 0.022㎍/g for Cu, respectively. 2. There was not statistically significant difference to mean concentrations of each heavy metal in hair cleaner by producing nation. 3. The highest mean concentration of each heavy metal in hair cleaner by type of use were 0.140㎍/g for Mn in sensitive hair cleaner(p<0.05), 0.053㎍/g for Cu in others products(p<0.01). 4. The mean concentration of heavy metals in hair cleaner by type of hair cleaner were high at 0.O54㎍/g for Pb in shampoo products(p<0.O5), 0.120㎍/g for Cr and 0.06㎍/g for Cu in combination products(p<0.01). 5. The mean concentration of heavy metals in hair cleaner by acidity were high at 0.056㎍/g for Pb, 0.124㎍/g for Cr, and 0.032㎍/g for Cu in alkali products (p<0.05). 6. Correlation coefficient of heavy metal concentration in hair cleaner were 0.175 for Pb and Cr, 0.165 for Pb and Mn, 0.824 for Cr, and Mn, 0.189 for Cr, and Ni, 0.406 for Cr, and Cu, 0.197 for Mn and Ni, and 0.375 for Mn and Cu(p<0.05). 7. Exposure amount of heavy metals per when we used lOg of hair cleaner (onetime using amount) were 0.46㎍ for Pb, 0.67㎍ for Mn, 0.69㎍ for Cr, 0.46㎍ for Ni, and 0.22㎍ for Cu, respectively. Conclusion : As above results, there was very low level concentration of heavy metal in hair cleaner but we are using the hair cleaner everyday, therefore we can exposed to heavy metals as cronic exposure so the author suggest to prepare the program of preventing the health impairment due to heavy metals.