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Vitamin A status of 20- to 59-year-old adults living in Seoul and the metropolitan area, Korea
Sungah Kim,Young-Nam Kim,Youn-Ok Cho 대한지역사회영양학회 2012 Nutrition Research and Practice Vol.6 No.1
Dietary intakes and plasma concentrations of retinol and carotenoids were estimated in assessing the vitamin A status of Korean adults living in Seoul and the metropolitan area. Three consecutive 24-h food recalls were collected from 106 healthy subjects (33 males and 73 females) aged 20-59 years. Fasting blood samples of the subjects were obtained and plasma retinol and carotenoids were analyzed. The daily vitamin A intakes (mean ± SD) were 887.77 ± 401.35 μg retinol equivalents or 531.84 ± 226.42 μg retinol activity equivalents. There were no significant differences in vitamin A intakes among age groups. The retinol intake of subjects was 175.92 ± 129.87 μg/day. The retinol intake of the subjects in their 50"s was significantly lower than those in their 20"s and 30"s (P < 0.05). Provitamin A carotenoid intakes were 3,828.37 ± 2,196.29 μg/day β-carotene, 472.57 ± 316.68 μg/day α-carotene, and 412.83 ± 306.46 μg/day β-cryptoxanthin. Approximately 17% of the subjects consumed vitamin A less than the Korean Estimated Average Requirements for vitamin A. The plasma retinol concentration was 1.22 ± 0.34 μmol/L. There was no significant difference in plasma retinol concentrations among age groups. However, the concentrations of β-carotene, lycopene, and lutein of subjects in their 50"s were significantly higher than those of in their 20"s. Only one subject had a plasma retinol concentration < 0.70 μmol/L indicating marginal vitamin A status. Plasma retinol concentration in 30% of the subjects was 0.70- < 1.05 μmol/L, which is interpreted as the concentration possibly responsive to greater intake of vitamin A. In conclusion, dietary intakes and status of vitamin A were generally adequate in Korean adults examined in this study.
65 ㎚ CMOS 공정을 이용한 V 주파수대 전력증폭기 설계
Sungah Lee,Chenglin Cui,김성균(Seong-Kyun Kim),김병성(Byung-Sung Kim) 한국전자파학회 2013 한국전자파학회논문지 Vol.24 No.4
본 논문에서는 Marchand 발룬, 트랜스포머와 주입 잠금 버퍼를 이용한 CMOS 2단 차동전력증폭기를 보여준다. 본 전력증폭기는 70 ㎓ 주파수 대역을 목표로 설계하였고, 65 ㎚ 공정을 이용하여 제작하였다. 측정 결과, 71.3 ㎓에서 8.5 ㏈의 최대 전압 이득과 7.3 ㎓의 3 ㏈ 대역폭을 얻었다. 측정된 최대 출력 전력은 8.2 ㏈m, 입력 P1㏈는 ?2.8 ㏈m, 출력 P1㏈는 4.6 ㏈m이며, 최대 전력 부가 효율은 4.9 %이다. 본 전력증폭기는 1.2 V의 전원으로부터 102 ㎽의 DC 전력을 소모한다. In this work, a CMOS two stage differential power amplifier which includes Marchand balun, transformer and injection-locked buffer is presented. The power amplifier is targeted for 70 ㎓ frequency band and fabricated using 65 ㎚ technology. The measurement results show 8.5 ㏈ maximum voltage gain at 71.3 ㎓ and 7.3 ㎓ 3 ㏈ bandwidth. The measured maximum output power is 8.2 ㏈m, input P1㏈ is ?2.8 ㏈m, output P1㏈ is 4.6 ㏈m and maximum power added efficiency is 4.9 %. The power amplifier consumes 102 ㎽ DC power from 1.2 V supply voltage.
The Effectiveness of Game Coding Education on Problematic Internet Gaming
Chung Sungah,Kim Sol I,Hwang Hyunchan,Han Doug Hyun 대한신경정신의학회 2023 PSYCHIATRY INVESTIGATION Vol.20 No.6
Objective Problematic internet gaming in adolescents is associated with various negative outcomes, such as low self-esteem, depression, anxiety, and attention problems. We hypothesized that game coding education, by improving adolescents’ self-esteem, would be more effective than game literacy education in mitigating problematic internet gaming.Methods A total of 126 adolescents who voluntarily applied for the game coding education and game literacy education program of the “Visiting Game Class” project operated by the Game Cultural Foundation participated in this study. We collected data on demographics, gaming patterns, and psychological status, including positive or negative perceptions of online games, depression, and anxiety. We designated those with scores higher than 40 on Young’s Internet Addiction Scale as the “problematic internet gaming” group.Results Only game coding education was significantly effective in decreasing internet use, lowering depressive symptoms, and improving self-esteem. In the hierarchical logistic regression analysis, more frequent education time, coding education, stronger negative perceptions of gaming, and high self-esteem predicted decreased internet gaming among participants exhibiting problematic internet gameplay.Conclusion Game coding education effectively mitigates problematic gaming by improving adolescents’ self-esteem. Thus, it may be beneficial to increase education time and devise game education programs tailored to adolescents’ psychological status.
Kang, Sungah,Chun, Jiseul,Park, Nojin,Lee, Sang Moon,Kim, Hae Jin,Son, Seung Uk The Royal Society of Chemistry 2015 Chemical communications Vol.51 No.59
<P>ZSM-5 nanoparticles coated with microporous organic polymers showed 88% retention of ammonia adsorption capacity at 43% RH.</P> <P>Graphic Abstract</P><P>ZSM-5 nanoparticles coated with microporous organic polymers showed 88% retention of ammonia adsorption capacity at 43% RH. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c5cc03470a'> </P>
모바일 어플리케이션을 이용한 직장내 검진결과, 식단 및 운동량 모니터링이 직원들의 체성분 변화에 미치는 영향
민성아(SungAh Min),이미준(MiJoon Lee),임민정(MinJung Im) 인문사회과학기술융합학회 2018 예술인문사회융합멀티미디어논문지 Vol.8 No.5
This study aims to investigate the impacts of mobile-based medical checkup, diet and exercise provided for employees by their self-monitoring on changes in their body composition. This study collected data from 106 workers at a single company, who wanted to participate in mobile monitoring before and after using SHP App for 100 days, and the collected data were analyzed through SPSS Win 23. The results of the study are summarized as follows: First, it was found that there was a statistically significant change in their body weight from 71.99±14.12 before self-monitoring health management using SHP App to 71.26±13.73 after using it (t=4.28, p<0.001). Second, it was found that there was a statistically significant change in the BSA of their visceral fat from 75.64±29.31 to 72.73±28.65 (t=4.77, p<0.001). Third, it was found that there was a statistically significant change in their body fat percentage from 18.36±6.38% before using SHP App to 17.64±6.07 after using it (t=3.39, p=0.001). As for an analysis of the correlation between variables, it turned out that all variables had positive correlations after using SHP App. In conclusion, this study found out that mobile-based monitoring had partial effects on changes in the participants’ body composition of the participants who managed their health with it in this study. 이 연구의 목적은 직장에서 임직원을 대상으로 모바일 기반으로 건강검진결과와 식사량 그리고 운동량 등의 모니터링이 체성분의 변화에 미치는 영향을 확인하기 위함이다. 연구 대상은 모바일 모니터링에 참여를 원한 106명을 대상으로 약 100일간 사전과 사후의 자료를 수집하였으며 수집된 자료는 SPSS Win 23으로 분석하였다. 연구결과, 첫째, 체중은 SHP App 사용전 71.99±14.12에서 사용후 71.26±13.73로 통계적으로 유의하였다(t=4.28, p<0.001). 둘째, 내장지방 체표면적도 75.64±29.31에서 72.73±28.65로 통계적으로 유의하였다(t=4.77, p<0.001). 셋째, 체지방률의 경우는 SHP App 사용전 18.36±6.38%에서 사용후 17.64±6.07로 통계적으로 유의하였다(t=3.39, p=0.001). 각 변수간 상관분석의 경우 SHP앱 사용후에는 모든 변수가 높은 양의 상관관계가 있는 것으로 나타났다. 결론적으로, 이 연구에서 모바일 기반의 모니터링으로 스스로 자신의 건강을 관리한 참여자들의 체성분 변화에 일부 효과가 있는 것으로 확인되었다.
UMM 모델링 방법론과 ebXML 워크시트를 이용한 신발산업의 비즈니스 프로세스 모델링
안성아(Sungah Ahn),염근혁(Keunhyuk Yeom) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.2Ⅱ
정보화 기술의 급속한 발전과 인터넷을 통한 세계적인 전자상거래 시장확대 및 B2B 비중의 증가 등 경제 패러다임이 변화하고 있다. 이러한 급변하는 시장환경과 B2B 거래 활성화에 따라 기업 간 비즈니스 프로세스 및 거래 문서의 표준화가 대두되었고, 이를 위해 XML을 이용한 인터넷 기반 글로벌 전자상거래 실현을 위한 지원 기술로서, ebXML이 국제 표준으로 등장하였다. 본 논문에서는 비즈니스 프로세스 모델링을 위한 UMM 모델링 방법론과 비즈니스 프로세스의 표준화를 위해 ebXML에서 제시하고 있는 워크시트를 이용하여 신발산업의 비즈니스 프로세스 표준화를 위한 모델링을 제안하였다.
커뮤니티 활성화를 위한 공동주거단지 환경계획요소의 중요도 평가에 관한 연구
양성아(Yang Sungah),이제화(Lee Jaehwa),하미경(Ha Mikyoung) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(계획계)
The purpose of this study is to investigate to environment for community activation of outdoor spaces of housing complex. In order to accomplish this purpose, the analysis of residents’ communication levels of each outdoor elements were conducted. The environmental planning factors for community activation of housing complex shown in the precedent studies are drawn, and a survey is performed on residents to evaluate the importance. Through the result of this study, 4 types of environmental plan and 25 factors for community activating of housing complex were presented.