• The Bulletin of The Korean Astronomical Society
• /
• v.36 no.2
• /
• pp.51.1-51.1
• /
• 2011

We introduce new methods to measure distance in precision using large scale structure formation. The accuracy to determine geometrical factors is enhanced in comparison to the previous method known as BAO. We determine both D_A and H simultaneously as well as structure of growth of density fluctuations and peculiar velocities. Our method is independent of any given prior on large scale structure formation such as the shape of spectra.

• Proceedings of the KIEE Conference
• /
• 2001.11b
• /
• pp.204-206
• /
• 2001

This paper presents methodology to evaluate interruption cost for determination of optimal reliability level. Recently, the power interruption cost is considered one of the useful index to determine optimal reliability level. Accordingly, in this paper reports estimation results of customer interruption cost to determine optimal reliability level by the economic macro method based on the 5 years from 1995 to 1999 and various kinds of customers in Korea.

• Proceedings of the KSR Conference
• /
• 2008.06a
• /
• pp.892-899
• /
• 2008

In this research, adapted was the 'Image Layered Technique(ILT)' to determine the character-line of the nose. Moreover, to derive the image of the front and side views of the nose, analyzed were the heads of animals and transportations. Presented was the pattern with the image to determine the volume with a front outline. Also, the image to be suggested to 'ILT' was applied to a front character design.

• Nuclear Engineering and Technology
• /
• v.30 no.4
• /
• pp.353-363
• /
• 1998

The H$_{\infty}$ algorithms of the mixed weight sensitivity is used for the robust design of the reactor power control system. The mixed weight sensitivity method requires the selection of the proper weighting functions for the loop shaping in frequency domain. The complexity of the system equation and the non-convexity of the problem make it very difficult to determine the weighting functions. The genetic algorithm which is improved and hybridized with the simulated annealing is applied to determine the weighting functions. This approach permits an automatic calculation and the resultant system shows good robustness and performance.

• Proceedings of the Korea Concrete Institute Conference
• /
• 1998.10b
• /
• pp.773-778
• /
• 1998

For imaging of concrete specimens using radar, the principles of radar, microwave, and the electromagnetic properties of concrete are discussed. Experimental data obtained from radar measurement of concrete specimens with no steel bars at three different frequency bandwidths of 2~3.4 GHz, 3.4~5.8 GHz and 8~12 GHz are processed to determine the thickness of the specimens. A signal processing scheme has been implemented to visualize the concrete specimens. The purpose of this study is to determine particular frequency range appropriate for measuring the thickness of concrete specimens using radar.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.24 no.67
• /
• pp.19-26
• /
• 2001

A design issue for a flexible manufacturing system is to find the number of each resource type which assures a given production ratio with a minimal cost. The FMS is modeled as a closed queueing network with a local buffer of limited capacity. An efficient method to determine this optical configuration is presented. The proposed method consists of three steps : 1) determine a lower configuration, 2) derive a heuristic solution, 3) find the optimal solution. The derived heuristic solutions are close to the optical solution.

• Proceedings of the KSR Conference
• /
• 2002.05a
• /
• pp.312-316
• /
• 2002

Tilting train is the best solution to provide faster passenger service on conventional railway lines without too costly modification of infrastructure. Kinematic envelope gauging is very important when applying tilting trains % conventional railways with limited clearance. Due to tilting motion, the kinematic envelope of tilting train is larger than that of non-tilting train. This study was done to estimate the maximum dimension of tilting train being suitable for Korean conventional lines. In this study the two worst cases of tilting train movement was assumed and related suspension displacements, geometrical overthrow of train on une, wear of wheel ＆ rail were combined to determine kinematic envelope.

• Proceedings of the ESK Conference
• /
• 1996.04a
• /
• pp.259-263
• /
• 1996

Psychological action is physiological response of outernal stimulus. Physiological response is accompanied b physiological signals which are EEG, EMG, GSR, ECG, BP, and tec. Physiological signals are recently studied for determination of human phychological state. Psychological activity causes electric potential of brain. Physiological signal is considered as measurement of human psychological state. Aditory sensibility which is one of the sense of human may determine differences between positive and negative feeling. EEG and GSR variation with auditory quality of stimulus can be define human negative and positive mental state. This study is to characterize parameters which can determine negative and positive psycholigical state of human.

• Journal of the Korean Institute of Telematics and Electronics
• /
• v.25 no.12
• /
• pp.1582-1585
• /
• 1988

A cavity perturbation technique is employed to determine the dielectric property of thin samples. Substrates in microwave integrated circuits are fabricated in sheet form and are expected to have a dielectric constant less than 10 and a dielectric loss better than 10**-3. This research aimed to determine both dielectric constant and dielectric loss with good accuracy. The tecynique makes use of thin circular disk samples placed in a right circular cylindrical cavity. The accuracy of measurements is within \ulcorner% for dielectric constnat and 3x10**-4 for dielectric loss.

• Journal of the Korean Society of Safety
• /
• v.22 no.1 s.79
• /
• pp.19-23
• /
• 2007

The aim of this study was to determine residual stresses in thermal barrier coatings(TBCs) by isothermal heating. Specimens were heated at the range of $1000{\sim}1600^{\circ}C$. A finite element method was used to determine the residual stresses. Finite element coupled heat transfer and elastic-plastic thermal stress analysis using a general purpose commercial FEM software ABAQUS. I obtained the stresses were not affected below the temperature of $1400^{\circ}C$ but affected over that of temperature.