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강금석,김민석,곽지영 한국풍력에너지학회 2017 풍력에너지저널 Vol.8 No.2
The Korean government announced a renewable energy target that is a 20 % share of renewables in theelectricity supply by 2030. This paper considered renewable energy scenarios for 2030 in Korea. Throughresource analysis and a siting study for solar and wind energy, the available capacity was estimated and newbusiness models were surveyed. Proper renewable energy scenarios were suggested considering the localdevelopment environment: resource potential, deployment experiences, environmental/grid constraints, etc. Solarpower would play a main role to meet the national renewable energy target at the early stage and wind powerwould supply a significant amount of electricity to the national grid in the long term. The main tasks foractivating the wind power supply chain in Korea, i.e., social acceptance, environmental regulations, siteplanning, grid integration, etc. are suggested.
한방 원료 추출물의 주름개선 효과를 통한 화장품 원료로서의 가치 평가
강금석,김인덕,권륜희,허예영,오상훈,김민아,정혜진,강환열,하배진,Kang, Kum-Suk,Kim, In-Deok,Kwon, Ryun-Hee,Heo, Ye-Young,Oh, Sang-Hoon,Kim, Min-Ah,Jung, Hye-Jin,Kang, Hwan-Yul,Ha, Bae-Jin 한국생명과학회 2007 생명과학회지 Vol.17 No.8
본 연구에서는 7가지 한방원료(음양곽, 복분자, 오미자, 구기자 , 건지황 l 사상자 , 토사자)의 항산화 효과, collagen 합성 촉진 효과, collagenase 활성 저해 효과를 비교 평가함으로써 주름개선 기능성 화장품 원료로서의 사용 가능성을 검토하였다. 항산화 실험인 DPPH 소거 효과, 리놀산 자동산화 억제 효과, superoxide radical 소거 효과, hydroxyl radical 소거 효과에서는 음양곽, 복분자, 오미자, 구기자가 대체적으로 뛰어난 활성을 보여 항노화 화장품 소재로서의 가능성을 보여주었으며, 주름개선 실험인 collagen 합성 촉진 효과, collagenase 저해 효과에서는 건지황, 사상자, 토사자가 다른 네 가지 물질에 비해 뛰어난 효과를 나타내어 주름개선 화장품 소재로서의 가능성을 보여주었다. 이러한 결과는 7가지 한방원료가 항산화 및 주름개선 효능을 나타내므로 기능성 화장품 소재로 활용될 수 있음을 보여 주었다. The human skin is constantly exposed to environmental irritants such as ultraviolet, smoke and chemicals. Free radicals and reactive oxygen species caused by them play critical roles in cellular damage. They not only injure the skin structure but also participate in the immensely complex inflammatory reaction. Anti-wrinkle effects of the Oriental herb extracts(OHE) were evaluated by the determination of anti-oxidation, collagenase inhibition and collagen synthesis in normal human fibroblast. OHE showed antioxidative activity as high as vitamin C, trolox and DL-penicillamine. Also OHE showed promotive effect on collagen synthesis and inhibitory effect on collagenase activity. These results demonstrated that OHE could be useful as an anti-wrinkle cosmetic ingredient.
LPS로 유도된 급성 간독성에 대한 구기자 추출물의 보호 효과
강금석,권륜희,김인덕,이동근,이재화,이상현,하종명,하배진,Kang, Kum-Suk,Kwon, Ryun-Hee,Kim, In-Deok,Lee, Dong-Geun,Lee, Jae-Hwa,Lee, Sang-Hyeon,Ha, Jong-Myung,Ha, Bae-Jin 대한약학회 2007 약학회지 Vol.51 No.5
The purpose of this study was to investigate the preventive effects of Lycii fructus Extract (LFE) against the acute hepatotoxicity-inducing lipopolysaccharide (LPS) in the liver. LFE of 100 mg/kg concentration was intraperitoneally administered into rats at dose of 1.5 ml/kg for 20 days. On the day 21, 1.5 ml/kg of LPS dissolved in saline was injected 4 hours before anesthetization. We examined the levels of glutamate oxaloacetate transaminase (GOT), glutamate pyruvate transaminase (GPT), lactate dehydrogenase (LDH) in serum of rats, superoxide dismutase (SOD) in mitochondrial fraction, and malondialdehyde (MDA), catalase (CAT), glutathione peroxidase (GPx) in liver homogenate. LPS-treatment markedly increased the levels of GOT, GPT, LDH and MDA, and significantly decreased those of SOD, CAT and GPx. But LFE-pretreatment decreased the levels of GOT, GPT, LDH and MDA, by 17.7%, 27.5%, 40.7% and 56.9%, respectively and increased those of SOD, CAT and GPx, by 90.5%, 78.9% and 83.8%, respectively. These results showed that the LFE had the preventive effects against the acute hepatotoxicity-inducing LPS in the liver.
일반항공 비행교관 역량별 행동지표 및 비행교관 교육요구 분석
강금석,박형준,김경태 한국항공운항학회 2023 한국항공운항학회지 Vol.31 No.1
This study aims to provide information necessary for developing a “Competency-Based Training and Evaluation Plan” for general aviation flight instructors in Korea. General aviation training experts designed a survey by selecting “Behavior Indicators” from the ICAO Flight Instructor Competency Model. This study analyses the importance of Behavioral Indicators, the level of instructor performance, and the training needs for flight instructors. According to the factor analysis, ICAO “Flight Instructor Competency Model” is found as a valid tool to measure general aviation flight instructor competencies. According to the training needs analysis, flight instructors training program needs to be improved on “Training Environment Management”, “Teaching Method”, and “Interaction” competencies. When compared with trainee group, flight instructors & examiners have a higher training demand for “Teaching & Learning Environment Management”. This study suggests the flight instructor training program requires to be reorganized based on the competencies related to the flight instructor duties in the training environments.