L-Moment 법을 이용한 지점가뭄빈도 해석

유재성,강인식,박준일,신형우 慶尙大學校生産技術硏究所 1999 生産技術硏究所論文集 Vol.15 No.-

In this research, the drought analysis was derived with monthly rainfall data from 59 stations from the Korea meteorological Administration. the point frequency analysis was derived with L-moment's method and indicated the fitted probability distribution for 59 points. also estimating the probability drought rainfall of the duration(4, 6, 8, 10, 12 months) and return period(2, 5, 10, 20, 50, 100 years). Thus, indicated probability drought rainfall frequency figure for whole area of country.

Pt계 촉매를 이용한 직접 개미산 연료전지의 특성 연구

유재근,이효송,김진용,김기호,이영우 충남대학교 공업교육연구소 2005 論文集 Vol.27 No.1

Direct Formic Acid Fuel Cells (DFAFCs) are potential alternative power sources for potable devices such as cellular phones, personal digital assistants (PDA) and laptop computers. In this study, we investigated the effect of the anode catalysts on the performance of direct formic acid fuel cell. We made the Pt-Pd catalysts using deposition method for the investigation of the fuel cell performance as a change of temperature and oxidant. Fuel cell with Pt-Pd anode catalyst showed the performance of 120 mW/㎠at room temperature. This result was much higher value than that of Pt-Ru catalyst which showed the best performance of commercial catalyst in our previous works. For this reason, we can conclude that the Pt-Pd catalyst is an excellent material for the oxidation of formic acid.

녹차추출물에 의한 식중독 원인균인 장내세균 Plesiomonas shigelloides의 세포반응

유미옥,천재우,오계헌 순천향대학교 기초과학연구소 2002 순천향자연과학연구 논문집 Vol.8 No.2

The aim of this work was to investigate the cellular responses in the food-poisoning bacterium, Plesimonas shigelloids in response to tea polyphenol (TPP) extracted from green tea. The stress shock proteins, which contribute to the resistance of the cytotoxic effect of TPP, were induced at different TPP concentrations in exponentially growing culture of P. shigelloides. This response involved the induction of a 70-kDa DnaK and a 60-kDa GroEL monoclonal antibodies, characterized by SDS-PAGE and Western blot by the use of the anti-DnaK and anti-GroEL monoclonal antibodies. Survival of P. shigelloides with time in the presence of different concentrations of TPP was monitored, and viable counts paralleled the induction of the stress shock proteins in this strain. This strain killed in the concentration of 1,000 ㎍/㎖ TPP within 2 hours of incubation. Scanning electron microscopy for the cells treated with 10,000 ㎍/㎖ for 12 hours showed the presence of perforations and irregular rod shaped with wrinkled surfaces.

Tea polyphenol에 노출된 식중독 원인세균 Listeria monocytogenes의 살균

유미옥,천재우,오계헌 순천향대학교 기초과학연구소 2004 순천향자연과학연구 논문집 Vol.10 No.2

The aim of this work was to investigate the killing effect of the food-poisoning bacterium, Listeria monocytogenes exposed by tea polyphenol (TPP) extracted from green tea. The stress shock proteins, which contribute to the resistance of the cytotoxic effect of TPP, were induced at different TPP concentration in exponentially growing cultures of L. monocygenes. This response involved the induction of a 70-kDa DnaK and a 60-kDa GroEL monoclonal antibodies, characterized by SDS-PAGE and Western blot by the use of the anti-DanK and anti-GroEL monoclonal antibodies. Survival of L.monocytogenes with time in the presence of different concentrations of TPP was monitored, and viable counts paralleled the induction of the stress shock proteins in this strain. This strain killed in the concentration of 1,000㎍/㎖ TPP within 4 hours of incubation. Scanning electron microscopy for the cells treated with 1,000㎍/㎖ for 12 hours showed the presence of perforations and irregular rod shaped with wrinkled surfaces.

연강우량 자료를 이용한 수문시계열의 특성 분석

유재성,강인식,박준일,신형우 慶尙大學校生産技術硏究所 1999 生産技術硏究所論文集 Vol.15 No.-

As the water resources planning is work out, it should have stationarity and randomness to be used hydrological time series data for frequency analysis or modeling which are kinds of probability analysis. But, in the case of domestic, we assume that the hydrological time series data is stationarity but, is not randomness, so it is usual to work out the hydrological analysis. Therefore, as a result, we can not be eliminate the possibility that the hydrological analysis brings about distorted results. Accordingly, in this research, to analysis the properties of hydrological time series data, the trend test, stationary and randomness test were used. The summary of results is as below. Result of the properties of hydrological time series data, in most of the points, the tendency is not indicated, the time series was revealed as randomness which does not have hydrological persistence as definitely stationary. But, from data of yearly rainfall, points for Taegwallyong, Ullungdo, both nonstationarity and persistence were indicated.

行列多項式 Liapunov 函數 構成에 依한 誘導電動機의 安定度 解析

李鉉雨,黃有燮,李浚析,文在星 慶南大學校 附設 工業技術硏究所 1988 硏究論文集 Vol.6 No.-

非線形 시스템을 나타내는 狀態空間의 動特性 모델로부터, 定常狀態 값들이 알려지면, 行列多項式에 依해, Scalar Type의 Liapunov 函數를 構成하고 이를 誘導電動機의 安定解析에 適用시킨다. 線形 시스템에 對한 Liapunov 函數의 構成法은 잘 알려져 있으나, 非線形 시스템의 Liapunov 函數 構成法은 아직 體系化되어 있지 못하다. 따라서, 本 論文에서는, 從來의 定常狀態 附近에서의 Taylor 展開에 依한 線形化 技法에 依存하지 않고, 非線形性을 나타내는 項을 分離하여, 行列變換시킴으로서, 線形시스템의 Liapunov 函數 構成法을 살리고, 非線形性이 强한 誘導電動機의 狀態空間모델에 適用시켰다. 그 結果, 求해진 安定領域은, 線形化에 依한 것보다는 훨씬 넓은 5次元의 超空間으로 表現되는 誘導電動機의 漸近安定領域이 되었다. In this paper, when the steady state values for multidimensional and nonlinear Dynamic Models of State Space Representations are given, Liapunov functions of scalar types using matrix quadratic polynomials are constructed by Special Matrix Transformation Techniques and are applied to Stability Analysis of Induction Motors. Futhermore, Liapunov function construction precedures for linear systems can be specified in detail. But, unfortunately, for nonlinear systems, there are no the complete construction techniques. In this paper, differently from conventional methods using Linearization obtained from Taylor series expansions about steady state operating points. Linear terms and nonlinear ones are individually seperated, and by special matrix transformation techniques, similiar construction procedurs such as in the cases of linear systems, are introduced, and are applied to Stability Analysis of Induction Motor. The hyperspaces of multidimensional stability region, obtained from these techniques, were larger than the obtained ones from conventional linearlization techniques about equilibrium points and were assured to be Asymptotic Stability Region ensuring the stable operation of Induction Motor.

급성신부전증 이환견에 대한 복막투석 치료 1례

김건우,이병희,김유수,심재현,김지용,이영원,김덕환,송근호 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

A fourteen-month-old intact female Poodle was referred to the Veterinary Teaching Hospital, College of Veterinary Medicine, Chungnam National University. The patient was presented with history of vomiting, inappetence, ataxia, insomnia, tachypnea and convulsion for 5 days. Biochemical examination revealed BUN (254.2 mg/dl), creatinine (9.22 mg/dl) and phosphate (14 mg/dl). Epithelial cells of urinary tract, neutrophils, macrophages, a large number of gram negative and smaller number of gram positive bacteria were presented on urine test. Ultrasonographic findings show hyperechogenic kidney and indistinguishableness of renal cortex and medulla. Based on the results of examination described above, this case was diagnosed as acute renal failure with interstitial nephritis by urinary tract infection (UTI). Treatments with fluids therapy, diuretics, and peritoneal dialysis during hospitalization showed good results with no clinical signs.

개에서 발생한 폐수종의 치료 증례

김유수,심재현,김건우,김지용,이병희,송근호,이영원,김덕환 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

A 9 months intact male American bull dog with chief complaints of dry cough, dyspnea and fever was referred to the Veterinary Teaching Hospital, Chungnam National University. Based on the findings of physical examination, radiological examination, and blood and blood chemical examinations, the present patient was diagnosed into pulmonary edema secondary to primary bacterial and aspiration pneumonia. The patient was hospitalized and treated with buscopan, cephazolin and furosemide for 1 week. His activity and appetite was returned to normal and thoracic radiographs revealed that Jung was recovered to the normal condition after treatment for 7 days. The present patient was a case with pulmonary edema showed favorable therapeutic responses to proper medication.

유해화학물질의 계통분석

박성우,박유신,이진훈,김남이,김유나,임미애,이상기,유재훈,진광호,신호상,노동석 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.-

아메바성 대장염과 연관된 Henoch-Scho¨nlein Purpura 1예

장재현,원경준,이준,변유미,이재광,김영훈,박찬국,김만우 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Henoch-SchonIein purpura is a common form of vasculitis primarily involving the skin, the gastrointestinal tract, the joints, the kidneys, and the nervous system. The etiological investigations are essential, because triggering factors are found in approximately half the patients such as viral, bacterial and parasitic infections, drugs, toxins, systemic diseases and cancer. But it's the correlation between Henoch-SchonIein purpura and Entamoeba histolytica has been rarely reported. We report a 29-years-old woman with Henoch-SchoIein purpura complicated by the lower gastrointestinal bleeding caused by the amoebic colitis. She complained of cramping abdominal pain, lower extremity purpura and hematochezia. Cysts and trophozoites of Entamoeba histolytica were detected in her stool. Skin biopsy demonstrated the leukocytoclastic vasculitis. She was administered metronidazole 1,500㎎ a day for the treatment of amebic colitis. Her hematochezia was improved, but the abdominal pain and purpura were not. The subsequent corticosteroid therapy improved her symptoms.