http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김광석,Hye-Min Lee,Ju-Hwan Kim,Injun Jung,나원진,이병선,Byung-Joo Kim,김정필 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.112 No.-
Despite active research on supercapacitors to address the demand for high-power backup power systems,the energy storage performance of supercapacitors at high current densities has scope for improvementowing to the poor kinetics of active materials. In this study, multiscale porous carbon-based active materialswere designed to improve the kinetics and power density of supercapacitors. These materials werefabricated by spinodal decomposition of a mixture comprising an epoxy resin, a curing agent, and a porogen,to which graphene was added to optimize the carbonaceous microstructure. The resultant materialexhibited a wider pore-size distribution and considerably improved microstructure than commercialactivated carbon (YP-50F). The charge-transfer resistance of the sample containing 3 wt.% graphene(A-EM3) was considerably lower than that of YP-50F owing to the microstructural improvement. Furthermore, the effective ionic conductivity of A-EM3 was approximately three times higher than thatof YP-50F owing to enhanced mass transfer. A-EM3 exhibited a high specific capacitance (81.0 F g1) atthe highest current density (10.0 A g1). Thus, spinodal decomposition and graphene addition are effectivemeans to fabricate high-power-density supercapacitors.
수수의 옥수수대찬 및 메티오닌 , 라이신의 첨가가 육계의 능력에 미치는 영향
김광석,한인규,하종규,곽종형 ( K . S . Kim,I . K . Han,J . K . Ha,C . H . Kwack ) 한국축산학회 1986 한국축산학회지 Vol.28 No.11
This experiment was conducted to examine the effect of substituting sorghum grain for corn, and methionine and lysine supplementation on the chick performances. Two hundred and eighty male broiler chicks were divided into 28 groups of 10 birds. Substitution levels of sorghum grain for corn were 0% (diet 1), 40%(diet 2 and 3), 60%(diet 4 and 5), and 80%(diet 6 and 7) of corn. The basis of supplementing limiting amino acids (methionine and lysine) was to meet the level of chick`s requirements. There were no significant differences in weight gain among groups. Adding sorghum grain to the diet increased (p$lt;0.05) feed intake. However, no differences in feed intake were observed among sorghum grain fed groups. Increased feed intake by chicks fed sorghum grains may have been caused by lower energy density of sorghum grain. Feed efficiency of diet 1 (no sorghum diet) was significantly (p$lt;0.05) better than those of other dietary groups, which probably can be explained by the lower energy density in sorghum grain. The effect of amino acid supplementation to the sorghum diets was not prominent in the present study.
사물인터넷 시대의 생체인식 스마트 센서 기술과 연구 동향
김광석,김대업,Kim, Kwang-Seok,Kim, Dae Up 한국마이크로전자및패키징학회 2016 마이크로전자 및 패키징학회지 Vol.23 No.2
With the pace of rapid innovation in technology of IoT (Internet of Things) and smart devices, biometric technology becomes one of the most progressive industries. Recent trends in biometrics show most are focused on embedding biometric sensors in mobile devices for user authentication. Multifactor biometrics such as fingerprint, retina, voice, etc. are considering as identification system to provide users with services more secured and convenient. Here we, therefore, demonstrate some major technologies and market trends of mobile biometric technology with its concerns and issues.