• 제어로봇시스템학회논문지
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• 제8권1호
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• pp.54-59
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• 2002

In the three-axis control of satellites by using on-board actuators, gyros are usually used to measure the attitude angles and angular rates. The gyros are operated by electronic parts and mechanical actuators. The digital components of the electronic parts consist of largely FPGA (Field Programmable Gate Array) as one of the methods for VLSI(Very Large Scale Integrated) circuit design, while the mechanical parts provide output signal directly by mechanical actuation of a spinning rotor. In this research, a mixed mode of gyro is implemented in FGA. In addition to the hardware implementation, the simulation study was conducted by using the SABER for the mixed mode simulator. Results for the practical implementation of the satellite ACS (Attitude Control System) interfaced with the data processing are also presented to validate the FPGA implementation.

• Korean Journal of Hydrosciences
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• 제8권
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• pp.111-123
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• 1997

A one-dimensional eddy diffusion model and a mixed-layer model are developed and applied to simulate the vertical temperature profiles in lakes. Also the running result of each method are compared and analyzed. In an eddy diffusion model, molecular diffusivity is neglected and eddy diffusivity which does not need lake-specific fitting parameter and constant lake's level are applied. The heat exchanges at the water surface and the bottom are formulated by the energy balance and zero energy gradient, respectively. In a mixed-layer model, two layers approach which has a constant thickness is adopted. The application of these models which use explicit finite difference and Runge-Kutta methods respectively demonstrates that the models simulate water temperatures efficiently.

• 대한임상검사과학회지
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• 제45권2호
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• pp.60-65
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• 2013

Data from repeated measurements are accomplished through repeatedly processing the same subject under different conditions and different points of view. The power of testing enhances the choice of pertinent analysis methods that agrees with the characteristics of data concerned and the situation involved. Along with the clinical example, this paper compares the analysis of the variance on ex-post tests, gain score analysis, analysis by mixed design and analysis of covariance employable for repeating measure. Comparing the analysis of variance on ex post test, and gain score analysis on correlations, leads to the fact that the latter enhances the power of the test and diminishes the variance of error terms. The concluded probability, identified that the gain score analysis and the mixed design on interaction between "between subjects factor" and "within subjects factor", are identical. The analysis of covariance, demonstrated better power of the test and smaller error terms than the gain score analysis. Research on four analysis method found that the analysis of covariance is the most appropriate in clinical data than two repeated test with high correlation and ex ante affects ex post.

• 대한약침학회지
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• 제21권1호
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• pp.14-17
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• 2018

Objective: It has been attempted to find out that Homine Placents and Soyeom mixed Pharmacopuncture (HSP) procedure is effective for the removal of melanocytic nevus of considerable size which cannot be applied to general acupuncture. Methods: Hominis placenta (0.5ml) and Soyeom (0.5ml) mixed pharmacopuncture (1.0ml) was subcutaneously injected in several places of melanocytic nevus. The treatment was performed about 20 times, once a week. Layer analysis of pigmentation was carried out using ECOSKIN. Results: One year after the HSP procedure, the pigmentation of the melanocytic nevus was slightly reduced and completely removed after 2 years of procedure. Conclusion: The HSP could be effective for removing hyperpigmentation in the melanocytic nevus.

• 대한전기학회논문지:전력기술부문A
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• 제51권8호
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• pp.403-408
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• 2002

As the electricity industry undergoes a process of fundamental restructuring, horizontal market power appears as a potential obstacle to a fully competitive wholesale electricity market. Market power is the ability profitably to maintain prices above competitive levels by restricting output below competitive levels. In models for imperfect competition under the consideration of the transmission constraints, the Nash equilibrium has the form of a mixed strategy. In this paper, the models for analyzing imperfect competition are compared using the solution of pure and mixed equilibria. The relation between market power and the capacity of a transmission line is investigated by imperfect competition analysis methods: Cournot, Bertrand, and Supply Curve model.

• 대한안전경영과학회지
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• 제9권4호
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• pp.129-136
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• 2007

This paper considers the sequencing of products in mixed model assembly lines under Just-In-Time (JIT) systems. Under JIT systems, the most important goal for the sequencing problem is to keep a constant rate of usage every part used by the systems. The sequencing problem is solved using Genetic Algorithm Genetic Algorithm is a heuristic method which can provide a near optimal solution in real time. The performance of proposed technique is compared with existing heuristic methods in terms of solution quality. Various examples are presented and experimental results are reported to demonstrate the efficiency of the technique.

• 한국자기학회지
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• 제22권2호
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• pp.33-36
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• 2012

1968년에 발표된 구식 싱글턴 혼합기수 고속푸리에 변환 포트란 서브루틴에 존재하는 일반적인 $N$ 문제에 대한 간단한 처치법을 제안하였다. 주어진 문제에 대한 간략한 검토를 마친 후에, 새로운 처치법을 동적메모리 할당방법의 입장에서 최악상황분석법을 통해 논의하였다. 본 논의를 통해 여기서 제시된 프로그래밍 기법은 최소한 다차원 데이터 집합에 대해 지금까지 제시된 여타 처치법보다 우월함을 보였다.

• Steel and Composite Structures
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• 제1권2호
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• pp.159-170
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• 2001

The Millennium Tower is situated to the north of the center of Vienna. With a height of 202 m it is the highest building in Austria. Realization was improved by new methods. The tower is a typical example of mixed building technology, combining composite frames with a concrete core. Special attention has been paid to the moment connections between the slim floors and the column tubes resulting in a drastically reduced construction time and thin slabs. The semi-continuity has been considered in the design at ultimate and serviceability limit states.

• 응용통계연구
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• 제17권1호
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• pp.1-12
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• 2004

본 논문에서는 2001년 경기도 양평 지역의 주민 880여명을 대상으로 반복측정되어 얻어진 혈압자료를 이용하여 반복요인이 세 개인 경우에 적절한 공분산구조를 선택하는 방법에 대해서 알아보고 혼합선형모형(mixed linear model)을 이용한 분석을 통해서 혈압에 영향을 주는 공변량(covariates)에 대해서 알아보았다.

• Communications for Statistical Applications and Methods
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• 제22권5호
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• pp.507-518
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• 2015

It is not easy to select a linear mixed model since the main interest for model building could be different and the number of parameters in the model could not be clearly defined. In this paper, performance of conditional Akaike Information Criteria and its bias-corrected version are compared with marginal Bayesian and Akaike Information Criteria through a simulation study. The results from the simulation study indicate that bias-corrected conditional Akaike Information Criteria shows promising performance when candidate models exclude large models containing the true model, but bias-corrected one prefers over-parametrized models more intensively when a set of candidate models increases. Marginal Bayesian and Akaike Information Criteria also have some difficulty to select the true model when the design for random effects is nested.