대동맥 분기부의 협착부에서의 혈액 유동 특성

신철수 한국교통대학교 2015 한국교통대학교 논문집 Vol.50 No.-

The three dimensional steady flows of blood and blood analogue fluids in the abdominal aortic bifurcation are simulated using the finite volume method. The objective of this investigation is to understand the generation and progression of specific atherosclerosis from a hydrodynamic point of view. Due to complexity of blood in conducting experimental study, aqueous polymer solution are used as the substitutional fluids. For comparison purpose of the flow characteristic of blood and substitutional fluids, rheology different fluids such as water soluble polymers of Carbopol-934 and Separan AP-273 are employed for the numerical simulation. In order to understand the role of hydrodynamic in the formation and development of atherosclerosis lesions flow velocities, pressures and shere stresses along the vessel are calculated for steady flows

유한해석 공식화의 이산화 방법에 의한 난류유동 해석에 대한 연구

신철수 忠州大學校 2002 한국교통대학교 논문집 Vol.37 No.4

The purpose of this study is to get discretization equation by the widely used Finite Analytic Method as numerial analysis thechiques for solving transport equation of flow problems.

우유 중 Antibiotic Residues 검출과 살균처리에 따른 영향

양철영,이수한 서울보건대학 1995 서울보건대학 부설 한국보건과학연구소 논문집 Vol.1 No.1

국내에서 널리 사용되고 있는 세균 발육 억제 물질 검출 시험의 일종인 dye지시약으로 2,3,5-triphenyltetrazolium chloride을 이용한 방법과 속성 검출 시험 방법인 pnzym kit를 이용한 방법으로 원유, 시유의 항생물질 검출성, 시험방법간의 검출능 비교와 살균처리에 의한 영향을 고찰한 내용은 다음과 같다. TTC 시험에 의한 원유 중의 항생물질 검출성은 3개 시험구 60시료에서 평균 25.00%의 양성율을 나타내고, 평균 시험 소요시간은 198.25분이었고, penzym 시험에 의한 양성율은 43.33%이고 소요시간은 31.35분으로 필요로 하였다. 시유 및 가공유 중의 검출성은 15시료의 TTC시험에 의한 경우 13.33%의 양성율과 penzym시험의 경우 46.66%의 양성율을 나타내고 있다. TTC시험방법에서 penicillin G는 0.03IU/ml, cloxacillin은 1.0×10^(-10)g/ml, oxacillin, ampicillin 및 sulfamethazine은 1.0×10^(-15)g/ml까지 검출이 가능하였으며 penzym 시험방법에서는 penicillin G는 0.001IU/ml, oxacillin, cloxacillin, sulfamethazine은 1.0×10^(-15)g/ml, ampicillin은 1.0×10^(-11)g/ml까지 검출성을 보였다. 100℃이내의 살균온도와 유지시간에서는 항생물질의 농도와 검출성의 차이가 발생하지 아니하였다. penzym 검출시험 방법은 특이성, 신속성, 간편성 및 재현성이 있음을 실험결과에서 나타내었다. By 2,3,5-triphenyltetrazolium-2H-chloride test method(TIC) and penzym test method, antibiotic residues in raw milk and city milk was detected, and we compared penzym test with TIC test for antibiotic detection, and we investigated the effect of holding treatment(LTLT, HTST) of various antibiotics added in 12% skim milk. The results obtained are summarized as follows; In case of raw milk, inhibitor positive were 25.00% and 43.33% of 60sample by TIC test and penzym test, and experimental require times was 198.25 minutes and 31.35 minutes, respectively. In case of market milk, inhibitor positive were 13.33% and 46.66% of 15 sample by TIC test and penzym test. The concentration of detected antibiotics by TIC test of penicillinG and cloxacillin were 0.03IU/ml and 1.0×10^(-10)g/ml, oxacillin, ampicillin and sulfamethazine were 1.0×10^(-15)g/ml. The concentration of detected antibiotics by penzym test of pencillin G and ampicillin were 0.00lIU/ml and 1.0×10^(-11)g/ml, oxacillin, cloxoacillin and sulfamethazine were 1.0×10^(-15)g/ml. The antibiotic residues were no changed on the less than l00℃ of heat temperature by TIC reduction test and penzym test. This study showed various merit such as specificity, fastness, simple handling by penzym test.

대동맥 분기부에 발생한 협착부의 혈액 유동 특성

신철수 忠州大學校 2005 한국교통대학교 논문집 Vol.40 No.2

The three dimensional steady flows of blood and blood analogue fluids in the abdominal aortic bifurcation are simulated using the finite volume method. The objective of this investigation is to understand the generation and progression of specific atherosclerosis from a hydrodynamic point of view. Due to complexity of blood in conducting experimental study, aqueous polymer solution are used as the substitutional fluids. For comparison purpose of the flow characteristic of blood and substitutional fluids, rheologically different fluids such as water soluble polymers of Carbopol-934 and Separan AP-273 are employed for the numerical simulation. In order to understand the role of hydrodynamic in the formation and development of atherosclerosis lesions flow velocities, pressures and shere stresses along the vessel are calculated for steady flows

볼텍스 펌프의 펌프 성능에 관한연구

申澈洙 충주대 산업과학기술연구소 1999 産業科學論文集 Vol.7 No.1

Impeller shape and number of vanes change drastically the pump performance. In this study effects of the number of the vanes on non-clogging pump performances are studidied experimentally. Results show that the total head and the efficiency of non-clogging pump increase as the number of vanes increases.

유체 유동 문제의 유한요소법 적용에 관한 연구

申澈洙 忠州大學校 1997 한국교통대학교 논문집 Vol.32 No.1

This study has been accomplished by offering the numerical analysis which is more useful to the parts of simulations of the actual models and time-speed than experimental investigation, for attaining she more detailed informations on flued flow. The finite element method is applied for fluid flow problems. 4 velocity-pressure formulation is used in the analysis. .4 mixed interpolation is employed for the velocity and pressure.

수치해법을 이용한 비뉴턴유체의 내부유동 문제해석

申澈洙 忠州大學校 1998 한국교통대학교 논문집 Vol.33 No.1

The purpose of this paper is to apply the numerical simulation techniques to the internal flow problems of non-Newtonian fluids. Rheologically different fluids such as water, aquesous Carbopol solutions, aquesous Separan solutions and blood are employed for the numerical approach to understand flow phenomena in the stenotic tubes and the bifurcated tubes. Mathematical formulations of rheological properties for the non-Newtonian fluids are obtained by a function of the shear rate using the modified power-law model, the Carreau model, the modified Cross model and the modified Powell-Eyring model. The results of numerical application to the internal flow problems are as follows : (1) The numerical results for the non-Newtonian fluids in the stenotic tubes and bifurcated tubes are in good agreement with the existing experimental data. (2) The proposed modified power-law model is suitable to describe the rheological behaviors of the non-Newtonian fluids. (3) The pressure loss coefficient in the stenotic tubes for various flow conditions can be determined by numerical methods.

저염 오징어젓갈의 숙성에 미치는 향신성분의 영향

채수규,허윤행,양철영,유희중 서울보건대학 1996 서울보건대학 부설 한국보건과학연구소 논문집 Vol.3 No.1

저염젓갈의 숙성에 미치는 향신성분의 영향을 조사하기 위하여 저염 오정어 젓갈로부터 숙성에 관여하는 주요세균을 분리하여 마늘, 고추, 생강 등의 향신성분의 항균성을 조사하고, 또한 7.5% 식염향유 저염 오징어 젓갈에 마늘즙 또는 고추가루 등을 가한 것과 가하지 않은 시제품을 제조하여 20℃에서 숙성시키면서 생균수와 이화학 성분의 경시적 변화를 비교 조사하여 다음과 같은 결과를 얻었다. 1. 저염 오징어젓갈의 숙성에 관여하는 주요 세균을 분리하여 형태학적 및 생리학적 특성을 조사한 결과 Staphylococcus, Bacillus, Micrococcus, Pseudomonas, Moraxella, Flavobacterium으로 屬레벨에서 동정되었다. 2. 마늘즙, 고추가루 추출물 및 생강 추출물 등의 향신성분을 이용하여 젓갈로부터 분리한 세균에 대해 발육 저지 상태를 조사한 결과 마늘즙의 경우는 마늘즙의 농도 20%로부터 그 이상의 농도에 의해 강한 항균작용을 나타내었으나 고추가루 추출물은 Bacillus균주만이 약간 저해작용을 나타내었고 생강 추출물의 경우는 젓갈 분리 세균에 대해 거의 저해작용이 관찰되지 않았다. 3. 7.5% 식염 함유 저염 젓갈의 경우 제조 직후의 생균수는 10^(5)/g 이었으며, 20℃에서 숙성시켰을 때 숙성 4일째에 이미 10^(7)/g에 달하였고 숙성 10일째에 10^(8)/g에 달해 부패하기 시작하였다. 3%로 마늘즙을 첨가한 저염 젓갈의 경우는 숙성 4일째에 10^(5)/g 정도였으며 숙성 10일째에도 10^(7)/g 정도로 control에 비하여 10^(1) 정도 낮은 수준이었으며 숙성 21일째에 이르러도 부패되지 않았다. 4. 7.5% 식염 함유 저염 젓갈의 경우 제조 직후의 pH는 6.50 정도이었으며 숙성 7일째까지는 pH 6.45 정도로 미미한 감소추세를 나타내다가 그 이후부터는 다시 증가되어 숙성 15일째부터는 pH 7 이상으로 부패되었다. 3%로 마늘즙을 첨가한 저염 젓갈은 숙성 10일째까지는 pH 6.37 정도로 서서히 감소추세를 나타내다가 그 이후부터 다시 서서히 증가되어 숙성 21일째에 pH 6.85 정도를 나타내었다. 5. 7.5% 식염 함유 젓갈의 경우 제조 직후의 아미노태 질소 함량 208㎎%이었으나 20℃에서 숙성시켰을 때 숙성 7일째 364㎎%, 숙성 14일째 597㎎%로 증가하였다. 3%로 마늘즙을 첨가한 경우는 숙성 7일째에 327㎎%, 숙성 14일째에 515㎎%로 증가하여 두 시료간의 아미노태 질소 함량의 차이는 숙성 7일째에 37㎎/100g, 숙성 14일째에 82㎎/100g으로 나타났다. 6. 7.5% 식염 함유 저염 젓갈의 경우 제조 직후의 VBN함량은 21.2㎎%이었으며, 20℃에서 숙성시켰을 때 숙성 10일째에 116.5㎎%, 숙성 14일째에 180.0㎎%를 나타내었고 TMA-N은 숙성 14일째에 41.3㎎%를 나타내어 부패가 진행되었다. 3%로 마늘즙을 첨가한 저염 젓갈은 숙성 14일째에 84.2㎎%, 숙성 21일째에 116.3㎎%를 나타내었고, TMA-N은 숙성 21일째에도 검출되지 않아 부패되지 않고 적정 숙성상태를 유지하고 있었다. To study on the effects of spice ingredients on the aging of low salted squid with 7.5% salt the garlic juice or the red pepper powder was added in the low salted squid. The changes in the chemical composition and viable cell counts of the low salted squid were investigated, individually, during the ripening process at 20℃. The major bacteria were isolated from the salted squid during the aging period and the physiological and biochemical properties of the isolates were investigated. The strains were identified at genus level as the Staphylococcus, Bacillus, Micrococcus, Pseudomonas, Moraxella and Flavobacterium, respectively. By the spice ingredients of garlic juice, red pepper extracts and ginger extracts, the inhibition of bacterial growth were investigated. Antimicrobial action was strong in the concentration of over 20% garlic juice. But only the strain of Bacillus was inhibited weakly by red pepper water extracts. The inhibition of bacterial growth by the ginger water extracts was not detected in the salted squid. Just after the preparation of the low salted squid with 7.5% salt, the viable bacterial cells occurred at a level of 10^(5)/g. The bacterial counts were increased to 10^(7)/g by the 4th day of ripening and increased to 10^(8)/g by the 10th day of ripening at 20℃ and then the salted squid was begun to spoil. In the low salted squid with 7.5% salt and 3% garlic juice, the bacterial counts were increased to 10^(5)/g by the 4th day of ripening and increased to 10^(7)/g by the 10th day of ripening at 20℃. The salted squid with 3% garlic juice was lower about 101 level than control in viable bacterial counts and it was not spoiled by the 21th day ripening at 20℃. Just after the preparation of the low salted squid with 7.5% salt, the pH value was 6.50. The pH value was decreased gradually to 6.45 by the 7th day of ripening at 20℃ and then the pH value was increased again to 7.0 by the 15th day of ripening and the salted squid was spoiled. In the low salted squid with 7.5% salt and 3% garlic juice the pH value was decreased gradually to 6.37 by the 10th day of was increased again to 6.85 by the 21th day of ripening. Just after the preparation of the low salted squid with 7.5% salt, the content of amino type nitrogen was 208mg%. The content of amino type nitrogen was increased to 364mg% by the 7th day of ripening and increased to 597mg% by the 14th day of ripening at 20℃. In the low salted squid with 7.5% salt and 3% garlic juice, the content of amino type nitrogen was increased to 327mg% by the 7th day of ripening and increased to 515mg% by the 14th day of ripening at 20℃. Therefore, the difference in amino type nitrogen content was 37mg/100g by the 7th day of ripening and 82mg/100g by the 14th day of ripening. Just after the preparation of the low salted squid with 7.5% salt, the contents of VBN was 21.2mg%. The content of VBN was increased to 116.4mg% by the 10th day of ripening and increased to 180.0mg% by the 14th day of ripening at 20℃. The content of TMA-N was 41.3mg% by the 14th day of ripening and the salted squid was begun to spoil. In the low salted squid with 7.5% salt and 3% garlic juice, the content of VBN was increased to 84.2mg% by the 14th day of ripening and increased to 116.3mg% by the 21th day of ripening at 20℃. The content of TMA-N was not detected by the 21th day of ripening. The salted squid was maintained on the proper ripening condition.

Flaubert의 『Bouvard et Pécuchet』에 대한 사회학적 접근

정수철 대구대학교 외국어교육연구소 1989 외국어교육연구 Vol.4 No.-

Notre étude a pour but de renouveler la vision de la société de Flaubert en éclaircissant le sens sociologique chez lui, parce que l'étude sociologique sur ses oeuvres a été néglisée par rapport à celles de Balzec et de Stendhal. En choisissant Bouvard et Pécuchet pour objet d'étude, nous allons l'analyser par quelques méthodes empruntées partiellement aux théories des sociologiques de la littérature. Bouvard et Pécuchet qui deviennet les porte-parole de Flaubert sont les individus problématiques comme l'est la plupart du héros des autres romans du dix-neuvième siècle. Nous pouvons observer que les deux héros sont toujours en quête et que toute la science de l'agriculture jusqu'à la pédagogie est l'objet de leur recherche. Mais l'échec des abécédaires est prévu à cause de leur incapacité et de l'immensité du monde qu'ils essainent de conquérir. Il est très intéressant que le processus de leur intellectuelle aventure a la structure du remplacement successif que l'on peut trouver sans difficulté chez Emma ou Frédéric. En échounant à un objet, ces héros-là poursuivent seccesivement un autre objet. Aussi faut-il observer que toute leur vie a la structure du retour circulaire. Après avoir parcouru toute la science ils reviennent enfin à leurs places comme autrefois, c'est-à-dire à les copistes qui étaient leur métier avant la recherche de la science. A travers de la structure du remplacement successif et de retour circulaire, Flaubert nous a exposé la bêtise de l'homme qui recherche en vain l'énorme monde hors de sa portée. Les personnages secondaires ne sont pas moins impartants à éclaircir le sens sociologique de cet oeuvre, parce que ces individus sont aussi les membres de la société dans le roman. Nous pouvons les diviser en deux classes: les bourgeois et les basses classes. Les bourgeois veulent acquérir les valeurs dégrdées, position sociale, réputation personnelle, ou intérêtégoïste etc., et les basses classes sont elles-aussi bêtises ou rusées. C'est à travers de tous ces personnages réalistes que Flaubert a essaté de nous révéler la sociéré pleine de la sottise.

원형 터널內의 壓縮性 流體흐름에 對한 實驗的 硏究

申澈泳 忠州大學校 1987 한국교통대학교 논문집 Vol.21 No.-

The author of this paper performed measurement of distribution of wind speed and a turbulence factor of wind at the spouting of open type wind tunnel installed in the laboratory of hydraulics, and obtained the result as follow The wind tunnel used has its length of 6,000㎜ with the spouting outlet carrying the spouting outlet with a caliber of 500 500㎜ 10ps motor and axis-wise air blower It was operated under testing at the wing speed of 4-29m/m at the outled. The turbulence fator revealed to be 1. 20, while the distribution of wind speeds was found nearly reasonable.