Group Contribution법에 의한 고압기-액평형

구본식,배효광 嶺南大學校 工業技術硏究所 1986 연구보고 Vol.14 No.2

The mixing rule derived from excess Gibbs free energy at infinite pressure is newly introduced in the SRK equation of state. The Gibbs free energy is predicted by the method of analytical solution of groups(ASOG). The group pair parameters for CH₂, CH₃, CH₄and CO₂groups are well correlated to the temperature. The vapar-liquid equilibria predicted from using the parameters for the binary systems of n-paraffins and carbon dioxide are compared with the results using the optimum interaction parameter(??). The average deviations of vapor mole fraction and pressure in this work are comparative to them by the optimum ??.

영상정보를 이용한 자율 이동 로봇의 장애물 회피 및 경로계획에 대한 알고리즘

구본민,방만식,김자룡 진주여자전문대학 2001 論文集 Vol.24 No.-

In this paper, we has been studied self-controlled mobile robot system with CCD camera. This system consists of TMS320F240 digital signal processor, step motor. RF module and CCD camera. we used wireless RF module for movable command transmitting between robot and host PC. This robot go straight until 93 percent filled screen from input image. And the robot recognizes obstacle about 95 percent filled something, so it could avoid the obstacle and conclude new path plan.

無限稀釋活動度係數 및 氣一液平衡値의 健全性檢討(Ⅰ)

具本植 영남이공대학 1981 論文集 Vol.10 No.-

"ASOG" model is used for wide range rather than other methods and is simple one of the methods for calculating vapour liquid equilibrium. The aim of this paper is to investigate to consistency of infinite dilution binary activity coefficient and vapour-liquid equilibrium, which is drive from the extrapolated group Wilson parameter of "ASOG" model for binary systems of groups of CH_2 and OH, n-Alcohol Water. Methanol and Ethanol-n-Alcohol. at 760mmHg. Infinite dilution binary activity coefficients have been calculated from the boiling point curve, by Gauteraux and Coates equations. And they are compared with values from the group Wilson parameter of "ASOG" model. The results are that they are nearly coinsided for n-Alcohol-Water system, but the more carbon number of n-Alcohol are increased, the more deviation from experimental data are increased for Methanol and Ethanoln-Alcohol system. Furthermore, from the group Wilson parameter calculated from boiling point data isobaric vapour-liquid equilibria data are obtained. For binary systems of above experiments, the data are proved thermodynamic consistency according to the Herington's consistency test, but the absolute arithmatics deviation with a literature values are increased as the increased as the number of carbon in n-Alcohol for Methanol and Ethanol-n-Alcohol system. As the difference of number of carbon between two Alcohols increases, it is that vapour-liquid equilibria values from the group Wilson parameter of "ASOG" model deviate more from experimental data.

氣泡塔에서 Ozone의 吸收 및 分解

具本植 영남이공대학 1979 論文集 Vol.8 No.-

Since ozone gas has many advantages in the water treatment process. the bubble column treating water with ozone is largely used for this purpose. This paper is aimed to investigate the mass transfer rate of ozone in the semi batch bubble column. Effects of temperature, gas velocity, and the partial pressure of ozone in the carrier gas, which is oxygen in this experiment, on the rates of absorption and decomposition of ozone were studied in the system. The overall liquid phase volumetric coefficient, Kier, of ozone in the bubble column previously filled with a specific amount of water to be treated at the temperature range of 10-35°C, was determined from the equation (4), and compared with that calculated from the equation(11) with was derived from Wilke and Higbie equations. The overall coefficient, Km, determined by equation(4) is a little bit smaller than that calculated by the equation(11). It is suggested that the decomposition rate of ozone in the water must be added to the absorption rate to estimate the correct amount of ozone absorbed in the water which has significant meaning in the real application. At constant temperature, the overall mass transfer coefficient, Its, increases proportionally with the linear gas velocity. Also the overall mass transfer coefficient, Kra, increases as the temperature increases in the range specified, but is not affected by the partial pressure of ozone. The rate of decomposition of ozone in the water at p117.6 can be described in the first order reaction with regard to the liquid phase composition of ozone. The activation energy of the decomposition reaction is found to be 21.75kcal/ moL

二相 下向竝流 充塡層에서 摩擦損失

具本植 영남이공대학 1980 論文集 Vol.9 No.-

Two-phase, gas-liquid concurrent down-flow in packed column was investigated to measure pressure loss and friction factor nearby trickle-flow region with packing material whose diameter smaller than 3mm. The investigations were carried out in packed acryl column, 3.6 cm diameter and 30cm in height, with glass beads. The packings were used 1.31, 0.79 and 0.595 mm as equivalent diameter of based on sphere. Two-phase pressure loss, dPr/z. was given in terms of gas flow rate, liquid flow rate, void fraction, packing size and liquid hold-up as following equation. 4 p t/z= 2 le e ,dpy At-r(t?e)=Rel. where, Ref = 32 . or um de g,.h.￠(t?e) Two-phase pressure loss (dPr/z) was measured from experiments, and it was inserted in above equation. Finally, an empirical relation between the two-phase friction factor (It) and Rer was found to be as followings, fr?Re:-r.,c

CO₂(1)-n-Paraffins(2) 이성분계에서 Peng-Robinson상태방정식의 분자간 상호작용계수의 일반화

구본식 영남이공대학 산업기술연구소 1991 産業技術硏究 Vol.5 No.-

Binary interaction parameters(k_(ij)) of the Peng-Robinson equation of state are determined for binary mixture for 533 vapour-liquid equilibria data in 42 isotherms consisting of CO₂(1) and C₂ to C_(10) n-Paraffins(2) at reduced temperature of n-Paraffins(2) from 0.56 to 0.97. The obtained parameters are correlated as a generalized function of reduced temperature of n-Paraffins(2), and the result is correlated as eg. (8). The experimental vapour-liquid equilibria values are compared with the calculated results of vapour-liquid equilibria by the generalized k_(ij)(k'_(ij)) of equation(8), and are compared with the results by optimum k_(ij) and by k_(ij)=0 which has commonly been used until now.

보리 춘파재배 적응성 품종의 특성 및 선발

이춘우,구본철,백성범,손영구,김홍식 한국국제농업개발학회 2002 韓國國際農業開發學會誌 Vol.14 No.1

보리 품종 중 춘파에 적응하는 품종을 선발하기 위하여 올보리 등 16품종을 시험한 결과를 요약하면 다음과 같다. 가. 천립중과 설립량과는 상관관계가 있어 천립중이 무거울수록 10a당 설립이 적고 수량은 많아지는 경향이었다. 춘파 재배는 생육기간이 짧고 고온하에 등숙이 이루어지므로 천립중이 가벼워지는데 대립종이 소립중에 비하여 설립이 적었다. 나. 수량은 맥종간에는 쌀보리가 겉보리나 맥주보리에 비하여 적었고, 또한 년차나 품종간 변이도 컸다. 다. 쌀보리 품종들은 겉보리에 비하여 간장이 짧고, 설립이 많아 수량이 적었다. 라. 춘파재배용으로는 천립중, 설립량, 간장, 성숙기, 수량 등을 고려할 때 올보리와 사천6호가 가장 안정성이 있는 품종으로 판단되었다. This study was conducted to select varieties for spring sowing in barley. The accumulated and the average temperatures affected the 1,000-grain weight and unmatured grain yield. There was a negative correlation between 1,000-grain weight and the yield of unmatured grain. The 1,000-grain weight became lighter because of short growth period and maturing in high temperature under spring sowing condition. Compare with the covered and two-row barley, the grain was lower than naked barley. Among 16 barley varieties. "Olbori", "Sacheon6" were well adapted to spring sowing condition.

인슐린 비의존성 당뇨병에 동반된 심상성 천포창 1 례

이상준,박진용,임태형,윤영호,권순대,남창욱,허규찬,박근용,구본식,김상표,장종억 啓明大學校 醫科大學 1997 계명의대학술지 Vol.16 No.3

저자들은 인슐린 비의존형 당뇨병 환자에서 통증성 구강내 미란 및 전신성 수포성 미란을 동반한 심상성 천포창 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Various skin conditions such as diabetic dermopathy, necrobiosis lipoidica diabeticorum, bullosis diabeticorum, granuloma annulare occur frequently in diabetes, although common lesions may be associated by chance. Pemphigus vulgaris(PV) is a blistering skin disease seen predominantly in elderly patients. This disorder is characterized by the loss of cohesion between epidermal cells with the resultant formation of intraepidermal blisters. These blisters rupture easily, leaving denuded areases that may crust and enlarge peripherally. In half or more of patients, lesions begin in the mouth: approximately 90% of patients have oromucosal involvement at some time during the course of their disease. But the relationship of this disorder with diabetes is not clear. We experienced a case of pemphigus vulgaris associated with NIDDM in 67 years old woman who was admitted due to painful oral ulcer and control of blood glucose, so we present this case with a review of literatures.

Phosphorus in the Young Supernova Remnant Cassiopeia A

Koo, Bon-Chul,Lee, Yong-Hyun,Moon, Dae-Sik,Yoon, Sung-Chul,Raymond, John C. American Association for the Advancement of Scienc 2013 Science Vol.342 No.6164

<P><B>We Are Stardust</B></P><P>Most of the universe's chemical elements were produced in stars, with the heaviest elements being produced when stars explode. <B>Barlow <I>et al.</I></B> (p. 1343) used the Herschel Space Observatory to obtain submillimeter spectra of the Crab Nebula, the remains of a stellar explosion that was witnessed on Earth in 1054 AD, and detected the first evidence of a noble gas-containing molecular ion in space—<SUP>36</SUP>ArH<SUP>+</SUP>. <B>Koo <I>et al.</I></B> (p. 1346) obtained near-infrared spectroscopic observations of the remains of another stellar explosion, Cassiopeia A, with the Palomar 5-m Hale telescope, and found evidence that a substantial amount of phosphorus was formed in the explosion. Among the six elements essential for life (hydrogen, carbon, nitrogen, oxygen, phosphorus, and sulfur), only the origin of phosphorus remained to be confirmed by observation.</P>

Poster Presentations : Vasodilation Effect of the Water Extract of Rheum palmatum L. in Rat Thoracic Aorta

(Bon Sik Koo),(Hong Yeoul Kim),(Seong Kyu Park) 서울시립대학교 산업기술연구소 2002 국제학술SYMPOSIUM논문집 Vol.10 No.1