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김복수,서용문,박영민,송승기 명지대학교 자연과학연구소 1998 자연과학논문집 Vol.17 No.-
Urea계통의 화합물인 urea hydrogen peroxide(CO(NH₂)₂H₂O₂)에 대한 ??N 핵사중극 공명실험을 77k에서 상온까지 실시하였다. 각각의 온도에 대한 위 공명진동수의 온도의존성과 공명선폭을 구하였으며,스핀-스핀 완화시간 및 스핀-격자 완화시간을 측정하여 결정의 동역학적인 측면에서 urea hydrogen peroxide를 연구하였다. 핵사중극 공명진동수는 온도가 증가함에따라 Kushida-Bayer type의 온도의존성을 나타내었으며, 스핀-스핀 완화시간과 공명선폭은 온도가 증가함에 따라 감소하는 경향을 보였다. 스핀-격자 완화시간은 150K 이하에서는 두개의 항으로 나타났으며, 200K를 기준으로 결정내의 분자운동이 달라지는 것으로 나타났다 ??N NQR invesigation has been made of the spin-spin and spin-lattice relaxation in urea hydrogen peroxide,Co(NH₂)₂H₂O₂ The line spectra point out only a slight change in the electonic distribution around the nitrogen site in NH groups as a result of protonation in urea, in agreement with the results of earlier stueies. A relativelyu large discrepancu in the relaxation spectra conpared with those in pure urea, on the other hand, indecates the presence of the fragments such as C=N??H₂, the motion of which seems to be one of the main contributions to the relaxation on this xomplex in addition to the quadropolar procerss. Our study demontrates this tendency apparently. The temperature behaviour of the relaxation times will be discussed with regard to the characteistics of the possible metion of the fragments.
김복수,유왕진,이철규 한국경영공학회 2005 한국경영공학회지 Vol.10 No.2
21 century is as time of infinite competition the knowledge base society where the creation knowledge and information become source of competitive power (Knowledge-based society) and the world-wide various nations leads and knowledge intensification of voice and existing industry of knowledge industry leadership grasp of competitive power high position security and world economy it concentrates a hazard national ability from new economic environment inside. Also, world economy the economic border collapsed with opening anger liberalization and the integration of world economy was accelerated and the restraint of advanced nation, pursuit of the late start developing country and competition from the enterprise for strategy helping each other back international market more were aggravating and information and knowledge with production element or the goods were wide in the economic whole and information knowledge revolution which circulates was developed and it followed hereupon and with the vitality where the knowledge base industry growth is new it rose to the surface.