암민코발트(Ⅲ) 착이온의 수소이온해리반응에 미치는 온도의 영향

오상오,박유철,이동철 慶北大學校 1982 論文集 Vol.33 No.-

The acid ionization constants of cis-aquo-bis(ethylenediamine)cobalt(Ⅲ) complexes have been spectrophotometerically (at 500 nm) measured in aqueous solution. According to curve fitting method, the equilibrium constants of reaction(1) and (2), K_1 and K_2 were measured at a various tempratures from analyzing the extinction coefficients of Co(Ⅲ) complex ions in a wide range of pH. 〔Co(en)_2(H_2O)_2〕^3+??〔Co(en)_2(OH)(H_2O)〕^2++H^+ (1) 〔Co(en)_2(OH)(H_2O)〕^2+??〔Co(en)_2(OH)_2〕^++H^+ (2) K_1 and K_2 values increased with increasing the temprature, were 1.5×10 exp (-6) and 1.5×10 exp (-10) respectively at 30℃ in 1M sodium nitrate solution : ΔH_1=7.5Kcal/mole, ΔH_2=6.5Kcal/mole and, ΔS_1=-2e.u., ΔS_2=23.6 e.u. The enthalphy and entropy changes indicate that the acid-base equilibria of Co(Ⅲ) ions are endothermic process and the effect of solvation is controlled over the reactions.

암민코발트(Ⅲ) 착이온의 수소이온해리반응에 미치는 온도의 영향

오상오,박유철,이동철 慶北大學校 物理化學硏究所 1984 硏究論文集 Vol.5 No.-

The acid ionization constants of cis-aquo-bis(ethylenediamine)cobalt(Ⅲ) complexes have been spectrophotometrically (at 500 nm) measured in aqueous solution. According to curve fitting method, the equilibrium constants of reaction(1) and (2), K_1 and K_2 were measured at a various tempratures from analyzing the extinction coefficients of Co(Ⅲ) complex ions in a wide range of pH. 〔Co(en)_2(H_2O)_2〕^3+ ⇔ 〔Co(en)_2(OH)(H_2O)〕^2+ + H^+ (1) 〔Co(en)_2(OH)(H_2O)〕^2+ ⇔ 〔Co(en)_2(OH)_2〕^+ + H^+ (2) K_1 and K_2 values increased with increasing the temperature, were 1.5×10 exp(-6) and 1.5×10 exp(-10) respectively at 30℃ in 1M sodium nitrate solution :ΔH_1=7.5㎉/mole, ΔH_2=6.5㎉/mole and, ΔS_1=-2e.u., ΔS_2=-23.6 e.u. The enthalphy and entropy changes indicate that the acid-base equilibria of Co(Ⅲ) ions are endothermic process and the effect of solvation is controlled over the reactions.

회분식 반응기에서의 공정변수 변화에 의한 침강성 탄산칼슘 제조

신보철,한상오,김주호,송지훈,송근호,이광래 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.B

For the preparation of calcium carbonate particles from aqueous Ca(OH)2 slurry, carbonation reaction of aqueous Ca(OH)2 slurry was carried out by batch method the CO2 into reactor filled with aqueous slurry of Ca(OH)2. The concentration of Ca(OH)2 varies from 1.00 to 7.00wt%, reactor temperature at 20 and 40℃, and reactor pressure from atmospheric pressure to 6.0kgf/cm2. Crystal structure of calcium carbonate was of calcite, the particle size were about 0.05 ∼2.0㎛, and the particle shape was cubic and spindle. When reactor temperature was higher, particle size of calcium carbonate was bigger and particle share was varied, but reaction rate was increased. When reactor pressure was higher, particle size of calcium carbonate was smaller, particle shape was cubic, and reaction ramie was increased.

분사법에 의한 탄산칼슘 제조

신보철,한상오,김주호,송지훈,송근호,이광래 강원대학교 석재복합신소재제품연구센터 2001 석재연 논문집 Vol.6 No.-

본 연구는 탄산가스화법에 의한 탄산칼슘 입자 제조 공정에 있어서, 탄산가스로 채워진 반응기에 수산화칼슘 슬러리를 분사하는 방법으로 탄산칼슘 입자를 제조하였다. 수산화 칼슘의 농도(0.25~1.0wt%), 분사압력(0.5kgf /㎠~1.5kgf /㎠) 및 반응기 온도(20℃, 28℃)의 변화에 따른 생성된 탄산칼슘을 관찰하였다. 수산화 칼슘의 농도가 비교적 높으면(0.75wt%, 1.0wt%), 생성물의 pH와 전도도는 높게 나타났다. 분사압력에 의한 탄산칼슘 제조의 변화는 분사압력이 높아질수록(1.5kgf /㎠), pH와 전도도는 높게 측정되었다. 그러나, 수산화 칼슘의 농도와 분사압력의 변화가 탄산칼슘의 입자크기, 형태, 결정구조에 영향을 미치지는 않았다. 반응기의 온도가 28℃에서 생성된 탄산칼슘은 1.0㎛이하의 칼사이트 상 입자가 제조되었으며, 20℃에서 생성된 탄산칼슘은 0.5㎛이하의 칼사이트 상 입자가 제조되었다. 반응기의 온도가 낮아질수록 탄산칼슘 입자의 크기가 작아짐을 알 수 있었다. For the preparation of calcium carbonate particles from aqueous Ca(OH)2 slurry, carbonation reaction of aqueous Ca(OH)2 slurry was carried out by spouting the aqueous slurry of Ca(OH)2 into reactor filled with CO2 gas. The concentration of Ca(OH)2 varies from 0.25wt% to 1.0wt%, nozzle pressure from 0.5kgf /㎠ to 1.5kgf /㎠, and reactor temperature were set at 20℃ and 28℃. With relatively high concentration of 0.75wt% and 1.0wt% of Ca(OH)2, pH and conductivity of product-stream were observed high value. High pH and conductivity were observed at high nozzle pressure of 1.5kgf /㎠. The concentration of Ca(OH)2 and nozzle pressure, however, did not change the particle size and shape of calcium carbonate synthesized by carbonation reaction. The reaction temperature affected particle size. At reactor temperatures of 28℃ and 20℃, the particle sizes were about 1.0㎛ and 0.5㎛, respectively. Crystal structure of calcium calcium carbonate was of calcite. When reactor temperature was lower, the size of calcium carbonate particle was smaller.

婦人用 韓服地의 壓縮特性에 關한 硏究

成秀光,權五敬 효성여자대학교 새마을연구소 1989 새마을硏究論文集 Vol.9 No.-

The purpose of this paper was to discuss effect of compressional properties on the hand values of fabrics for KWFC. And also relations between the properties and concerning to foundation of weared clothes were examined. Furthermore, the compressional properties of fabrics for KWFC were discussed in comparison with those values of fabreics for Japanes kimono clothes. The results are summarized as follows; 1. The compressional resistance and compressional elasticity of silk fabrics for KWFC are superior to polyester fabrics for KWFC. 2. The compressional properties of fabrics for KWFC have positive correlation with thickness of fabrics for KWFC. 3. In wearing performance, air porosity of silk fabrics for KWFC are higher than those values of polyester fabrics for KWFC. And also bulkiness of silk fabrics for KWFC are superior to polyester fabrics for KWFC. 4. The correleation coefficient between compressional properties and hand values such as stiffness, anti-drape stiffness and flexibility with soft feeling are over 0.8. 5. The compressional resistance of fabrics for KWFC are superior to fabrics for Japane kimono clothes. On the other hand, The compressional recovery of fabrics for KWFC are inferior to fabrics for Japanes kimono chothes.

자성포착제를 이용한 폐수중의 중금속 이온처리에 관한 연구

吳相午,朴裕哲,金昌洙 慶北大學校 1978 論文集 Vol.25-26 No.-

The contaminants, such as As, Pb, Cr, Hg, and Cd are chemically associated with magnetic seeding material and subsequent removal of this seed sweeps the pollutants from the waste water containing the heavy metal. The principle of operation of high gradient magnetic separation devices is the interaction between magnetic forces and competing gravitional hydrodynamic and interparticle forces within the magnetic separator. The advantage of treatment by high gradient separation over conventional techniques is the high speed and large capacity of magnetic filtering device. Ferrite and δ-FeOOH have been found to be especially efficient for removing the heavy metal from waste water containing the heavy metal. The heavy metal is easily removed by high gradient magnetic separation. Mechanism for removing the heavy metal from the waste water have been proposed to be adsorbed on the surface of magnetite and substituted iron of Ferrite or δ-FeOOH by the other metal.

이족로봇의 경사면 균형 유지와 보행에 관한 연구

오성남,윤동우,손영익,김갑일,임승철,강환일 명지대학교 산업기술연구소 2007 産業技術硏究所論文集 Vol.26 No.-

This paper aims to provide a way to improve dynamic stability of biped robots against undesirable disturbances and in a slope. By using an angular velocity sensor and an acceleration sensor on its waist, we can make a medium-sized biped robot walk stably in a slope against impulsive disturbances. In addition, it is possible for the robot to walk stably in an unknown slope. The measured signals from the sensor are used for compensating the reference angles of ankle, knee, and pelvis joints. Some experiments show that the stability of the robot is much enhanced by using cheap sensors and a simple algorithm. This work helps biped robots walk more stably in real environments.

皇山 高斗東 時調의 空間硏究

吳昇姬 한국교원대학교 한국어문교육연구소 1998 한국어문교육 Vol.7 No.-

초음파 센서 기반 이동로봇의 장애물 회피

오세봉,이우송,Le Xuan Thu,한성현 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-

In this paper, it is presented a new approach to the design of intelligent control system of a autonomous robot with two drive wheel. The proposed control scheme uses a Gaussian function as a unit function in the fuzzy neural network, and back propagation algorithm to train the fuzzy neural network controller in the framework of the specialized learning architecture. It is proposed a learning controller consisting of two neural network-fuzzy based on independent reasoning and a connection net with fixed weights to simply the neural networks-fuzzy. The performance of the proposed controller is shown by performing the computer simulation for trajectory tracking of the speed and azimuth of a mobile robot driven by two independent wheels.

사과나무 2年生枝 發育程度와 短果枝着生및 新梢發達과의 關係

吳成都,張俊澤 全北大學校 1987 論文集 Vol.29 No.-

Spur frequency on 2-year old wood relation to cultivars has been investigated in order to obtain basic data for forcing of flower bud differentiation in apple tree(Malus domestica Borkh). The relationship between vigor of 2-year old wood and spur frequency on that wood was also studied. Diameter of 2-year old wood of experimented cultivars ranged mostly 10.1mm to 20.0mm but that of Fuji grafted on MM106 (Fuji/MM106) was inferior to other cultivars. There was no difference in flowering rate of spurs in relation to diameter of 2-year old wood. In the subsequent year Mutsu cultivar showed same vigor as the previous year in diameter of 2-year old wood but Fuji showed very weak growth of 2-year old wood, thus it seemed to be the cause of the alternative bearing habit in Fuji cultivar. The shoot appearance on upper node of 2-year old wood in Fuji, regardless of rootstock varieties, was higher than other cultivars; it might cause low spur frequency. In Fuji the relationship between shoot appearance on upper node and length of 2-year old wood was significant, whereas in Starkrimson, Mutsu, and Jonagold the relationship between shoot appearance and diameter of 2-year old wood was significant. In Fuji, vigor of 2-year old wood was little related to frequency of spur, but in Starkrimson, Mutsu, and Jonagold has a significant relationship between spur frequency and diameter of 2-year old wood. Therefore, Fuji cultivar is likely to be little different phenomenon as related to tree vigor in flower bud differentiation and spur frequency of 2-year old wood when compared with other cultivars.