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조주현,강충일,하윤철,진윤식,이경자,이창규,Cho, Chu-Hyun,Kang, Chung-Il,Ha, Yoon-Cheol,Jin, Yun-Sik,Lee, Kyung-Ja,Rhee, Chang-Kyu 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.9
Nickel wires of 0.8 mm in diameter and 80 mm in length were electrically exploded in liquid media such as water, ethyl alcohol. The distribution of particle sizes was broad from a few micrometers to tens of nanometer. It was identified that the particles could be classified according to its sizes by using centrifugal separator. The powder prepared in distilled water showed mainly pure metallic Ni phase although a little oxide phase was observed. The powders prepared in ethyl alcohol showed complicated unknown phases, which is attributed to the compound of carbon in the organic liquid. This unknown phase was turned to pure metallic Ni phase after heat treatment.
SOI 기판을 이용한 Thermal Probe 어레이 제작 및 특성 평가
조주현,나기열,박근형,이재봉,김영석,Cho, Ju-Hyun,Na, Kee-Yeol,Park, Keun-Hyung,Lee, Jae-Bong,Kim, Yeong-Seuk 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.11
This paper reports the fabrication and characterization of $5\;\times\;5$ thermal cantilever array for nano-scaled memory device application. The $5\;\times\;5$ thermal cantilever array with integrated tip heater has been fabricated with MEMS technology on SOI wafer using 7 photo masking steps. All single-level cantilevers have a diode in order to eliminate any electrical cross-talk between adjacent tips. Electrical measurements of fabricated thermal cantilever away show its own thermal heating mechanism. Thermal heating is demonstrated by the reflow of coated photoresist on the cantilever array surface.
초고압 차단기용 코일건 타입 조작기의 기술적 타당성 검토
曺柱鉉(Chu-Hyun Cho),李弘植(Hong-Sik Lee),金錫煥(Seog-Whan Kim),金永培(Young-Bae Kim),李佑暎(Woo-Young Lee),金烘?(Hong-Kyu Kim) 대한전기학회 2006 전기학회논문지C Vol.55 No.7
A novel coil gun type actuator has been proposed and tested for its possibility as an actuator for a high voltage circuit breaker by experimental method. The 20kJ capacitor bank with the electrolytic condensers was charged up to 500V and discharged to a couple of 100 turn coils connected with parallel through a thyristor switch. The repulsive force between coil and the actuator made by copper conductor of 20㎏ reached up to 23,000 N, and over 800J of energy was transferred to the kinetic energy of the conductor. The experimental results showed that the coil gun type actuator has a good possibility for the high voltage circuit breaker.
이인숙 ( Lee Insook ),방경숙 ( Bang Kyung-sook ),김성재 ( Kim Sungjae ),이준아 ( Lee Juna ),조주현 ( Jo Juhyun ) 서울대학교 간호과학연구소 2019 간호학의 지평 Vol.16 No.2
Purpose: This study aimed to develop the Korean Prototype of Wellness Index (KP-WI) and identify the relationship between Koreans’ health characteristics and wellness. Methods: The Wellness Index (WI) was translated into the primitive version of the KP-WI, considering the Koreans’ culture and health behavior. It was administered to 223 service industrial employees at one workplace along with the Positive Affect and Negative Affect Schedule (PANAS) and Stress Questionnaire-Short Form. Data analyses included item-total correlation, Pearson’s correlation coefficient, independent t-test, and one-way ANOVA. Results: The primitive version was modified to KP-WI based on the item-total correlation. The items considered to lower the reliability of the KP-WI were eliminated. Cronbach’s ⍺ for each subscale ranged from .857 to .939. Perceived stress and negative emotions correlated significantly with wellness measured by KP-WI (r=-.29, p<.001; r=-.27, p<.001). Positive emotions correlated significantly with wellness (r=.60, p<.001). Conclusion: This study contributes to the development of Korean-style wellness indexes by developing a prototype and exploring the factors related to wellness.