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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
Journal Basic Information
Journal DOI :
The Korean Institute of IIIuminating and Electrical Installation Engineers
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Volume & Issues
Volume 24, Issue 12 - Dec 2010
Volume 24, Issue 11 - Nov 2010
Volume 24, Issue 10 - Oct 2010
Volume 24, Issue 9 - Sep 2010
Volume 24, Issue 8 - Aug 2010
Volume 24, Issue 7 - Jul 2010
Volume 24, Issue 6 - Jun 2010
Volume 24, Issue 5 - May 2010
Volume 24, Issue 4 - Apr 2010
Volume 24, Issue 3 - Mar 2010
Volume 24, Issue 2 - Feb 2010
Volume 24, Issue 1 - Jan 2010
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A Study of the Change in Visual Perceptions of Finishing Materials using Lightings with the CG Experiment Method
Seo, Ji-Eun ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 11, 2010, Pages 1~8
DOI : 10.5207/JIEIE.2010.24.11.001
This study analyzes whether a person`s visual perception differs according to the kinds of light source. Evaluations of the effects of space, color-tone and texture perception revealed that different kinds of light sources change the perception of finishing material. The perception from directly attached lamps was compared to an environment with both directly attached lamps and supplemental lighting. We found the perception changed with changes in the types of supplemental light source We compared the mean value of each perception and found that perceptions change most when incandescent lights were followed by halogen. Thus, one should account for the changes in perception that occur as a result of these changes.
Application of an Optical Current Transformer For Measuring High Current
Kim, Yeong-Min ; Park, Won-Zoo ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 11, 2010, Pages 9~16
DOI : 10.5207/JIEIE.2010.24.11.009
This paper examines the temperature characteristics of an Optical CT (optical current transformer) using the Faraday effect for measuring high current in a super high voltage-power apparatus. It is performed as follows by the sensor for embodying Faraday effect.
A single-mode optical fiber capable of maintaining a polarization state is used.
A light source is applied at 1310[nm] to a Laser Diode.
The Linear of Faraday effect to a large current is evaluated and
A possible application using an Optical CT was shown. An Influence of Faraday effect to the surrounding temperature measured -40~50[
], and the characteristic of the current sensitivity was reported. An application using the results of the temperature compensation system was used in order to compensate for surrounding temperatures. A possibility of applying Optical CT for electric power apparatus was advanced further. We were able to confirm that this temperature calibration method can minimize the fluctuation of the output signal depending on the temperature conditions.
A Time-Saving Method for Analyzing Permanent Magnet Motors
Won, Sung-Hong ; Han, Ki-Soo ; Kim, Tae-Heoung ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 11, 2010, Pages 17~22
DOI : 10.5207/JIEIE.2010.24.11.017
This paper presents a unique method for simulating permanent magnet motors without time-consuming numerical methods used in the conventional magnetic circuit method. The conventional method gives us average values like torque and power over specified periods of time, but it is usually very difficult and time-consuming to obtain instantaneous characteristics like cogging torques and torque ripples. The convolution operations method we present, however, considers relative angle variations of stator magnetic circuits and rotor magnetic circuits. As a result, it makes uses of instantaneous values possible. The authors compare the new method with the coventional method and verify that calculating cogging torque values and back-emf values is possible with the proposed new convolution method.
A Study of Optimizing Cathodic Protection in Comparison of Design Methodologies
Choi, Young-Kwan ; Choi, Sang-Yule ; Shin, Myong-Chul ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 11, 2010, Pages 23~29
DOI : 10.5207/JIEIE.2010.24.11.023
The principal factor determining an optimum design method for cathodic protection is finding the protection current for preventing the corrosion of existing, already laid pipe. Some factors currently used to test designs include the sizes and lengths of pipes, soil resistivity, and the coating damage rate. We believe this method and current formulae are not optimum due to the uncertainty of determining the coating damage rate and the corrosion protection current`s density. This paper analyzes the amount of protection current obtained by performing a temporary current test using data describing existing laid pipe. We then propose determining the corrosion protection current by using the temporary current test after modifying the formula. In addition, we suggest a way to choose optimized cathodic protection and the process of design by executing the design and taking account of such factors as a site condition of 34km-long non-protected water supply pipe lines (stages I and II) in
region, climate, interferences, and durability.
An Improved Texture Feature Extraction Method for Recognizing Emphysema in CT Images
Peng, Shao-Hu ; Nam, Hyun-Do ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 24, issue 11, 2010, Pages 30~41
DOI : 10.5207/JIEIE.2010.24.11.030
In this study we propose a new texture feature extraction method based on an estimation of the brightness and structural uniformity of CT images representing the important characteristics for emphysema recognition. The Center-Symmetric Local Binary Pattern (CS-LBP) is first used to combine gray level in order to describe the brightness uniformity characteristics of the CT image. Then the gradient orientation difference is proposed to generate another CS-LBP code combining with gray level to represent the structural uniformity characteristics of the CT image. The usage of the gray level, CS-LBP and gradient orientation differences enables the proposed method to extract rich and distinctive information from the CT images in multiple directions. Experimental results showed that the performance of the proposed method is more stable with respect to sensitivity and specificity when compared with the SGLDM, GLRLM and GLDM. The proposed method outperformed these three conventional methods (SGLDM, GLRLM, and GLDM) 7.85[%], 22.87[%], and 16.67[%] respectively, according to the diagnosis of average accuracy, demonstrated by the Receiver Operating Characteristic (ROC) curves.