• Title/Summary/Keyword: Characteristic value

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Analysis and Understanding of Eddy Current Problem using electromagnetic field Packeg (전자장 해석 프로그램을 이용한 와전류 문제의 해석 및 이해)

  • Lim, Keon-Gyu;Lee, Hyang-Beom
    • Proceedings of the KIEE Conference
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    • 2006.07b
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    • pp.1237-1238
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    • 2006
  • When the coil with alternating current approaches to the conductor the eddy current flows in conductor. Eddy current is concentrated on the conductor surface and decrescent because of skin effet.. In this paper investigated eddy current characteristic that is happened in conductor. Analyzed characteristic using electromagnetic field finite element analysis program that is commercialized to analyze value of eddy current and penetration depth. Analyzed creation value of eddy current and penetration depth in conductor that change operation frequency and the material of conductor, coil outside diameter, inside diameter, position, type of conductor from analyzed eddy current characteristic. The results. using distribution of eddy current and penetration depth data is that will help to forecast ECT(Eddy Current Testing), Eddy current application and use field, eddy current loss.

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Analysis and Understanding of Eddy Current Problem using electromagnetic field Packeg (전자장 해석 프로그램을 이용한 와전류 문제의 해석 및 이해)

  • Lim, Keon-Gyu;Lee, Hyang-Beom
    • Proceedings of the KIEE Conference
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    • 2006.07c
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    • pp.1697-1698
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    • 2006
  • When the coil with alternating current approaches to the conductor the eddy current flows in conductor. Eddy current is concentrated on the conductor surface and decrescent because of skin effect. In this paper investigated eddy current characteristic that is happened in conductor. Analyzed characteristic using electromagnetic field finite element analysis program that is commercialized to analyze value of eddy current and penetration depth. Analyzed creation value of eddy current and penetration depth in conductor that change operation frequency and the material of conductor, coil outside diameter, inside diameter, position, type of conductor from analyzed eddy current characteristic. The results, using distribution of eddy current and penetration depth data is that will help to forecast ECT(Eddy Current Testing), Eddy current application and use field, eddy current loss.

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chalcogenide thin films of diffraction efficiency characteristic according to the wavelength (칼코게나이드 박막에서의 파장에 따른 회절효율 특성)

  • Lee, Ki-Nam;Yeo, Chul-Ho;Sin, Hyung;Chung, Hong-Bay
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2003.11a
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    • pp.456-459
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    • 2003
  • In this thesis, We observed the characteristic of the diffraction efficiency according to the wave length of the chalcogenide thin films. The used an $Ag(200{\AA})/As_{40}Ge_{10}Se_{15}S_{35}$ thin film. We made grating formation by each wave length 325nm, 442nm, 632.8nm. After measure diffraction efficiency of the time. We expressed the maxium saturation value at fast time as were the short wavelength and stable characteristic. On the other hand we appeard to the by a maxium diffraction efficiency the 1.7% in 325nm, 0.8% in 442nm, 0.27% in 632.8nm. The maximum diffraction efficiency expressed high value as were the long wavelength.

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A Study on Dynamic Characteristic Analysis of Straight Bevel Gear (직선베벨기어의 동특성해석에 관한 연구)

  • Lyu, Sung-Ki;Shin, Gue-Su
    • Journal of the Korean Society for Precision Engineering
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    • v.12 no.12
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    • pp.157-164
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    • 1995
  • Straight belvel gear is used mainly for steering system, final reduction and differential gear in the automobile. The more high load, high velocity driving bevel gear, the more unsafe and unpleasant. In thid study, we get a kinematic equation by modelling straight bevel gear pair with simple elastic system, the dynamic characteristic analysis about this system, we got the dynamic load factor of tooth surface. Comparing the value of dynamic load factor by calculation with the measured value of Terauchi's experimental results is similar. We think it useful to analysis the vibration and the noise of straight bevel gear in operation with the analytic method of dynamic load of straight bevel gear using in this study.

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Effects of Hydrophilic Treatment by IAR Method on the Packing Characteristic Value (이온 보조 반응법에 의한 친수성 처리가 충전재 특성값에 미치는 영향)

  • Kim, Jin-Ho;Choe, Chung-Hyeon;Gang, Byeong-Ha;Lee, Jae-Heon
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.25 no.4
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    • pp.554-560
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    • 2001
  • Hydrophilic treatment of the packing materials in a cooling tower has been made by the ion assisted reaction (IAR) method to increase the wettability of the packing materials. The effects of hydrophilic treatment of packing materials on the performance of a cooling tower have been investigated in a wide range of operating parameters, such as water flow rate, air flow rate, and the water inlet temperature. A pilot cooling tower has been designed and built to model a counter-flow cooling tower. The results obtained indicate that the packing characteristic value with hydrophilic packing could be substantially increased by 6∼19.3% than that with conventional packing in the operating ranges considered. The correlations of the packing characteristic value as a function of water-to-air ratio are suggested for a counter-flow cooling tower with hydrophilic packing as well as with conventional packing.

A Novel System for Detecting Adult Images on the Internet

  • Park, Jae-Yong;Park, Sang-Sung;Shin, Young-Geun;Jang, Dong-Sik
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.4 no.5
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    • pp.910-924
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    • 2010
  • As Internet usage has increased, the risk of adolescents being exposed to adult content and harmful information on the Internet has also risen. To help prevent adolescents accessing this content, a novel detection method for adult images is proposed. The proposed method involves three steps. First, the Image Of Interest (IOI) is extracted from the image background. Second, the IOI is distinguished from the segmented image using a novel weighting mask, and it is determined to be acceptable or unacceptable. Finally, the features (color and texture) of the IOI or original image are compared to a critical value; if they exceed that value then the image is deemed to be an adult image. A Receiver Operating Characteristic (ROC) curve analysis was performed to define this optimal critical value. And, the textural features are identified using a gray level co-occurrence matrix. The proposed method increased the precision level of detection by applying a novel weighting mask and a receiver operating characteristic curve. To demonstrate the effectiveness of the proposed method, 2850 adult and non-adult images were used for experimentation.

The Effects of Demographic Characteristics and Psychological Characteristic on Make-up Behavior of Women (성인여성의 인구통계적 변인과 심리적 특성이 화장행동에 미치는 영향)

  • Choi, Su-Koung
    • Journal of the Korean Society of Costume
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    • v.57 no.8
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    • pp.60-74
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    • 2007
  • This study intends to examine the influencing factors in personal intention and show-off of make-up behavior. For the study, a questionnaire survey was conducted of 436 women in between their twenties to fifties residing in the Kyeongnam region. Obtained data were analyzed pearson's correlation coefficient and multiple regression analysis. The result is summarized as follows.; The influence on personal intention and show-off of make-up behavior can be described into 4 factors that are included in the decision making process of personal intention and show-off, in other words, the demographical characteristic, the body cathexis, the need and the clothing value. The demographic characteristics, the marriage status, the occupation status and the media contact had a direct influence on personal intention, and the educational background had a direct influence on show-off. The body cathexis did not have a direct influence on any subordinate factors of personal intention and show-off, but had indirect influence having the need as a parameter or had no influence having the clothing value as a parameter.

Aesthetic Education into the Internal Logic and Practice Path of Rural Characteristic Industrial Construction

  • Lu Ziyan
    • International Journal of Advanced Culture Technology
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    • v.11 no.4
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    • pp.273-278
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    • 2023
  • Aesthetic education in a variety of forms in the sublimation of the people's feelings, sublimation of the soul. It is of great significance to inherit and develop rural culture and to maintain cultural diversity. At present, rural characteristic industry is an important form of development to promote rural economic development, protect rural cultural diversity and continue rural culture. It is of great practical significance to guide the development direction of rural characteristic industry, strengthen the value connotation of rural characteristic industry and stimulate the endogenous power of rural characteristic industry. At the same time, it is of great significance to promote the development of aesthetic education and broaden the path of aesthetic education.

행렬세임에서의 감도분석

  • 성기석;박순달
    • Journal of the Korean Operations Research and Management Science Society
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    • v.13 no.1
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    • pp.1-9
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    • 1988
  • The purpose of this paper is study the sensitivity analysis of matrix game. Teh sensitivity analysis of matrix is classified into two types. Type one is to find the characteristic region of an element of the pay off matrix in which the value of the current optimal strategy remains as an optimum. Type two is to find that in which the basis of the current optimal strategy does not change. This paper shows the characteristic regions of basic and nonbasic strategies. Further it is found that the characteristic regions of type one and two are same in the case that the element is that of at least one player's nonbasic strategy.

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