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유리단 국소의치 장착 후 M.K.G.에 의한 하악운동 형태 및 속도의 변화
최현미,조주온,이상돈,송광엽,박찬운 全北大學校 齒醫學硏究所 1992 전북치대논문집 Vol.10 No.1
The purpose of this study is to evaluate the effects of distal extension partial denture on the mandibular movement patterns and velocity. The subjects are 10 patients who have unilateral or bilateral distal extension edentulous area in maxillary and/or mandibular arches. Their mandibular movement patterns and velocity had been measured by Mandibular Kinesiograph(M.K.G.-K6 diagnostic system, Myo-tronics Inc. Seattle. WA. U.S.A.) once just before the treatment and 8 times every week since the dentures were placed. The data have been analyzed statistically by means of ANOVA and Tukey test. The results have been obtained as follows : 1. The placement of the dentures has reduced the amount of vertical and antero-posterior displacement in the habitual mandibular movement significantly(p<0.01). 2. The maximum opening and closing velocity and the mean opening and closing velocity showed no significant change with the placement of the partial dentures(p>0.01). 3. The velocity trace of maximum opening-closing movement has been more regularized and well-coordinated, and the number of clicks decreased continuously after placement of the dentures and showed stable patterns since the 5th week(p<0.01). 4. The left deviation has been decreased significantly after the placement of the dentures and showed no significant change since the 4th week. The right deviation has also been reduced, but there was shown no difference after the 1st week(p<0.01). 5. The crossover pattern has been most frequently observed in the frontal plane and the sagittal plane. It has not been changed with the denture placement and stabilized uniformly.
崔尙惇,趙龍在,申光錫 경북대학교 과학교육연구소 1993 科學敎育硏究誌 Vol.17 No.-
As easy way to utilize the isolation-projection technique in deriving the cyclotron absorption formula is introduced.
崔孝惇,洪性一 慶一大學校 1993 論文集 Vol.9 No.1
Production planning and inventory control are important issues due to the large-scale and complexity of a current production system. Especially, there have been many researches in the aggregate production planning, but most of studies do not consider a fuzziness about the objective preference of a decision maker and represent an uncertainty as probabilistic measure. To make up these points, an interactive fuzzy algoritm is developed for quantifying a fuzziness by interaction between decision analyst and decision maker. This paper presents a basis for applying this algorithm to the aggregate production planning with multi-objective.
최상돈,강남룡 경북대학교 과학교육연구소 1996 科學敎育硏究誌 Vol.20 No.-
We review a many-body theory of megneto-optical conductivity for a system of electrons interacting with phonons which was introduced already by the present authors [Progr. Theor. Phys. 96, 307 (1996)]. The scattering factors appearing in the conductivity tensor are calculated in datail by the many-body technique.
崔尙惇 慶北工業專門大學 1974 論文集 Vol.11 No.-
Some relations between the thermodynamic potential and the time-dependent Green functions are deduced.
최상돈,김영미,이연주,석적영,조상규 慶北大擧校 師範大學 科學敎育硏究所 2000 科學敎育硏究誌 Vol.24 No.-
If we apply a circularly polarized light to semiconductors, in the external static magnetic field, then the electrons absorb the light at the resonance frequency, resulting in the interband-transition from valence band to conduction band. The linewidth is affected by various mechanisms. Here we will compare the isolated operator method and the single operator method.
최순돈,민봉기,양승봉,신현준 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.1
We studied the homogeneous plating on the dented part of door frame by decreasing or increasing the current density, installing air blower, adjusting the length between anode and cathode, using auxiliary anode, developing the new plating bath and etc. When we performed the zinc cynade plating, there was no way to achieve the homogeneous plating layer without using auxiliary anode. However, it wasn't a suitable and efficient method for appling to the real process. After we developed the plating bath that had the uniform current density, we were able to get the homogeneous plating layer of zinc on the dented door frame.
崔孝惇,洪性一 慶一大學校 1993 論文集 Vol.9 No.1
This study concerns about a possible fire protection way for high-rise buildings. It is foud that the number of high-rise buildings are increased 29.4% while the number of fire are increased 16% than the year of 1990. The important characteristics of fire on buildings can be described as : 1. It flashes over all around after a certain time period. 2. It is necessary to extinguish the fire on the initial growth since it flashes over 2-5 meter per second through the vertical openings of buildings. Therefor, there is a big possibility that it is developed to uncontrollable fire. The fire protection facilities for fire prevention purposes require a good maintenance system since they are very delicated and complicate. The age of the system also affects the performance of the system and makes the system malfunction. It is found that 96.2% of high-rise buildings had fire detection system and 82.8% of them were in good shape in the year of 1991. However, only 39.2% of the alam system worked properly with 13.2% of utilization. In this study, it is suggested that installation of intelligent fire dection systems developed using the modern electronic techniques for high-rise buildings as well as the components and installation processes. In stallation of the system is strongly recommended since there is a stack effect on the fire at high-rise buildings and it is very difficult to maintain the delicated and complex fire dection systems. The installation of this system requires a big investment on the beginning stage, however it will save many lives while reducing the hazards and losses of fire at high-rise buildings.
Green-Kubo 형식에 의한 전기전도도 Tensor
崔尙惇,李三寧,李國煥 경북대학교 산업기술연구소 1987 産業技術硏究誌 Vol.14 No.-
Electric conductivity tensor is obtained on the basis of the Green-Kubo formalism.
최상돈,석정영,이연주 경북대학교 과학교육연구소 1995 科學敎育硏究誌 Vol.19 No.-
Utilizing the combined projection technique, we derive the conductivity tensor for a many electron system in solids. We find that the current is given in a time-correlation function in the quasi-adiabatic approximation