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Hybrid Superconducting Fault Current Limiter of the First Half Cycle Non-Limiting Type
Gyeong-Ho Lee,Kwon-Bae Park,Jungwook Sim,Young-Geun Kim,Il-Sung Oh,Ok-Bae Hyun,Bang-Wook Lee IEEE 2009 IEEE transactions on applied superconductivity Vol.19 No.3
<P>Resistive superconducting fault current limiters (SFCL's) are assumed to be a prospective solution for commercialization. But in spite of excellent current limiting performances realized by resistive SFCL's, commercialization and installation of SFCL's have been delayed due to difficulties in overcoming several technical problems such as a coordination with conventional relays. Resistive SFCL's may have difficulty in controlling an initiation of current limiting operation that sometimes is very important for coordination with relays, because the superconductor in the SFCL will quench immediately after the fault current reaches its critical current. In order to solve these problems, a novel hybrid SFCL of the first half cycle non-limiting type was developed. This paper presents the characteristics of this hybrid SFCL, its configuration and test results.</P>
HONG, Gyeong-Eun,KIM, Dong-Gyun,PARK, Eun-Mi,NAM, Bo-Hye,KIM, Young-Ok,KONG, In-Soo Japan Society for Bioscience, Biotechnology, and A 2009 Bioscience, biotechnology, and biochemistry Vol.73 No.2
<P>We identified outer membrane vesicle (OMV) production in <I>Vibrio anguillarum</I> O1, a major fish pathogen that causes vibriosis, and characterized the OMVs. They were produced during normal growth, and were appeared as spherical vesicle fractions. The protein profile of the OMVs was similar to that of the outer membrane proteins, and the 38-kDa major protein band of OMV was identified as OmpU. The OMVs had enzyme activity of metalloprotease, hemolysin, and phospholipase, and stimulated the production of proinflammatory cytokines, such as TNF-α, IL-1β, and IL-6 when injected into the flounder.</P>
버찌(Prunus pauciflora) 추출물을 이용한 모발의 염색특성
홍경옥 ( Gyeong Ok Hong ),박철호 ( Chul Ho Park ) 한국미용학회 2013 한국미용학회지 Vol.19 No.5
The purpose of this study is to examine the possibility of anthocyanin pigments of Prunus pauciflorat, which is natural hair dye and freefrom skin irritation and environmental pollution, as hair dye to make up for the limitations of natural hair dye such as simple color and unscientific process of hair dyeing. In order to achieve this purpose, anthocyanin concentration was analyzed by measuring absorbency from anthocyanin 520nm of Prunus pauciflorat and color changes were observed according to changes in temperature and pH through color measurement. Hair dyeing was increased in dye intake(K/S) with increased dyeing temperature(20℃~60℃) and hair color was changed from red to purple. With increased pH, a* value proceeded from +(red) to -(green) or a color meter was reacted to yellow of original bleached hair and In the alkalic status, red brown or red green or a yellow green was shown because of reddish brown deposits and discolored original color of anthocyanin mordant. It brought about poor dye intake and dyeing or mordanting effects were lost. Itsuggested that anthocyanin mordants were specially sensitive to pH and dye intake was rapidly decreased with increased pH.
Automatic Stöckigt Sizing Test Using Hue Value Variation of a Droplet
JAE-OK KIM,CHUL-HWAN KIM,YOUNG-MIN LEE,GYEONG-YUN KIM,TAE-GI SHIN,CHONG-YAWL PARK 한국펄프·종이공학회 2006 한국펄프종이학회 기타 간행물 Vol.- No.-
The Stockigt sizing test of the most-commonly used sizing tests is easily influenced by the individual testers’ bias in recognizing red coloration. Therefore the test had to be modified to improve its reliability and reproducibility by automated recognition of a coloration procedure during testing. In order to achieve this, all measured variables occurring during the Stockigt sizing test was first be analyzed and then reflected in the new automatic system. Secondly, the most important principle applied was to transform the RGB values of the droplet image to hue (H), saturation (S) and value (V) respectively. This is because RGB cannot be used as a color standard, owing to RGB’s peculiarity of being seriously affected by the observer’s point of view. Therefore, the droplet color had to be separated into three distinct factors, namely the HSV values, in order to allow linear analysis of the droplet color. When the average values of the vectors calculated during color variation from yellow to brown were plotted against time, it was possible to determine the vector value of hue, the most sensitive factor among HSV, at the specific time by differentiation of a function when it exceeds the critical point. Then, the specific time consumed up to the critical point was regarded as the Stockigt sizing degree. The conventional method took more time to recognize an ending point of coloration than the automatic method, and in addition the error ranges of the conventional sizing degrees on the specific addition points of AKD were wider than those of the automatic method.