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실리카지지 니켈-구리 합금에서 일산화탄소의 흡착에 관한 FTIRS 연구
박상윤,윤구식,윤동욱 울산대학교 2003 자연과학논문집 Vol.13 No.1
실리카지지 니켈, 실리카지지 구리, 실리카지지 니켈과 구리의 합금에서 일산화탄소의 압력을 변화시키면서 적외선 스펙트럼을 관찰했다. 또한 시료를 실온에서 진공탈착시키면서 적외선 스펙트럼을 관찰했다. 실리카지지 니켈에 일산화탄소를 흡착시켰을 때 2019.1~2036.5 cm^(-1), 1862.9~1868.7 cm¹의 두 흡수띠가 관찰되었고, 실리카지지 구리에 일산화탄소를 흡착시켰을 때 2109.8~2115.5 cm^(-1)의 두 흡수띠가 관찰되었으며, 실리카지지 니켈과 구리의 합금에서는 2113.6~2123.2 cm¹, 2009.5~2036.4 cm^(-1), 1876.4 cm^(-1)~1899.5 cm^(-1)의 세 흡수띠가 관찰되었다. 실리카지지 구리, 실리카지지 니켈, 실리카지지 구리-니켈에서 관찰된 흡수스펙트럼은 이전의 보고와 근사적으로 일치했다. 실리카지지 구리-니켈에서 조성에 따른 흡수띠의 이동은 Ni과 Cu의 원자의 크기의 차이로 인한 표면 스트레인의 변화, 표면에서 금속의 전자밀도 변화, 표면 구조의 변화의 복합작용으로 설명이 가능하다. We have investigated the infrared spectra for CO adsorbed on silica supported nickel, copper, Ni-Cu alloys of several compositions at various CO partial pressures and on pumping to vacumn at room temperature within the frequency range of 1500 cm^(-1)~2500 cm^(-1). Two bands(2019.1-2036.5 cm^(-1), 1862.5- 1868.7 cm^(-1)) were observed for the 4 % Ni-SiO₂sample, a band(2109.8~2115.5 cm^(-1)) was observed for the 4 % Cu-SiO₂sample, and three bands(2113.6~2123.2 cm^(-1), 2009.5~2036.5 cm^(-1), 1876.4~1888.5 cm^(-1)) were observed for the 4 % Ni/Cu-SiO₂samples. These absorption bands corresponded with those of the previous reports. With the 4 % Ni/Cu-SiO₂ samples the absorption band shifts may be ascribed to interaction of the strain changes due to atomic size differerence, the changes of electronic densities, and the changes of surface geometries.
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박상윤,최선영,엄영익 成均館大學校 科學技術硏究所 2000 論文集 Vol.51 No.1
In recent years, Internet-based application services on the mobile environment have been activated, and the developments of mobile internet application for user authentication and privacy have been required. Especially, the research for preventing disclosure of identity caused by user mobility is on the progress. In this paper, we introduce the study of an authentication. protocol for anonymity and untraceability supporting the protection of user identity with C5 privacy class and the authenticated secure association mechanism between mobile hosts and remote domains.
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朴相允,崔媛永 成均館大學校 1962 論文集 Vol.7 No.-
By Warburg's manometric method, the oxygen consumptions in brain slices of nine species belonging to vertebrate were measured and compared. The brain tissues were as follows; Carassius carassius, Ophicephalus argus, Rana nigromaculata nigromaculata, Rana rugosa, Agkistrodon halys brevicaudus, Amyda maackii, Emberiza rutina, Alcedo atthis bengalensis, and Rattus norvegious. QO_2 of endogenous respiration in the brain slices of amniota were measured and compared as follows. In amniota, the values of QO_2 were 0.48, 0.59, 0.64, 0.44, and 0.67 ( μl/mg/hr) in Agkistrodon, Amyda, Emberiza, Alcedo, and Rattus, respectively. In glucose media, the oxygen consumptions in each sample of aminota were 0.58, 0.69, 0.70, 0.61, and 0.72 ( /mg/hr) . According to the above results, it was clear that the oxygen consumptions were increased by adding glucose in amniota at the rate of 20.83, 16.94, 9.37, 38.63, and 7.46 per centage, respectively. The endogenous respirations in the brain tissues of anamnia were 0.73, 0.98, 0.56 and 0.88 ( 1/mg/hr) in Carassius, Ophicephalus, R. nigromaculata, and R. rugosa, respectively. In glucose media, the oxygen consumptions in each sample of anamnia were 0.69, 0.88, 0.47, and 0.84 ( 1/mg/hr). The oxygen consumptions in the brain tissues of the anamnia were decreased by adding glucose as follows; 5.47, 10.20, 16.07, and 4.54 per cent in Carassius, Ophicephalus, R. nigromaculata, and R. rugosa, respectively. There was a tendency that the amounts of oxygen consumptions were measured of more value in the species of the light weight in brain than the heavy one. There was not, however, any correlation amount the body weight, brain weight/body weight, QO_2 of endogenous respiration, and QO_2 in glucose media. There was a tendency that the endogenous respiration in anamnia is greater than that in amniota, except in frogs.
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朴相允,曺東鉉 成均館大學校 1969 論文集 Vol.14 No.-
The oxygen consumption of the brain slices of nine species belonging to the vertebrata was measured by Warburg's manometric method when as they were put in L-glutamate as a sole added substrate. Nine species of vertebrata, i.e. Ophicephalus argus, Carassius carassius, Rana nigromaculata nigromaculata, Rana rugosa, Amyda maackii, Gallus gallus domesticus, Columba livia domestica, Emberiza rutila and Lepus cuniculus, were used in this experiment. The brain slices experimented with media containing 10mM of glutamic acid reveal that the oxygen uptake depressed in Ophicephalus argus, Carassius carassius, Rana nigromaculata nigromaculata, Rana rugosa, and Amyda maackii, but increased in Gallus gallus domesticus, Columba livia domestica, Emberiza rutila and Lepus cuniculus.
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박상윤,최원종 한국항공대학교 항공우주산업기술연구소 2003 航空宇宙産業技術硏究所 硏究誌 Vol.13 No.-
In this study, the design and analysis of various energy storage flywheel types such as single material rotors(7075-T6, T300/epoxy, S2-glass/epoxy, and Kevlar/epoxy), multiple material rotors (S2 glass/epoxy+T300/epoxy), and hoop/helical wounded flywheel rotors were performed. An analytical model has been used to calculate the elastic stress of rotor systems subjected to internal force. The exact solution for rotating circular thick cylindrical shells has been obtained under assumption of axis-symmetric and plane strain conditions. Analysis results show that the behavior of flywheel rotors were strongly influenced by the key design parameters such as material properties and hoop/helical winding pattern. Also, the result of tradeoff study revealed that the multiple material rotor system was the most effective design concept for energy storage flywheel.
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포스터 세션 : 물체 무게에 따른 팔의 굽힘(flexion)과 폄(extension)운동에 대한 동작의 부드러움 측정
박상윤,최미현,이수정,양재웅,최진승,문경률,탁계래,정순철 한국감성과학회 2009 추계학술대회 Vol.2009 No.-
본 연구에서는 팔의 굽힘(flexion)과 폄(extension)운동 시 물체의 무게에 따른 저크의 변화를 통해 부드러움을 정량화하고, 물체무게와 움직임의 형태(type)에 따른 동작의 부드러움을 비교하고자 한다. 10 명의 오른손잡이 남자 대학생(평균 24.8±1.1 세)을 실험 참여자로 선정하였다. 물체무게(0g, 1000g)와 움직임의 형태(손등 위/아래)를 달리하여 팔의 굽힘과 폄 운동을 실시하였다. 또한 3 축 가속도 센서를 이용하여 x 와 z 축의 가속도를 측정하였고, 측정된 신호로 부터 저크값을 추출 하였다. 실험은 총 8 분으로 4 개의 block 으로 구성되며 각 block 은 resting 구간 1 분과 lifting 구간 1 분으로 구성된다. 실험 결과 물체무게 0g 에 비해 1000g 에서 가속도와 정규저크 값이 유의미하게 감소하였다.
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