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Business Model 특허분석을 통한 모바일 서비스 연구
양현림 ( Yang Hyunlim ),오호연 ( Oh Hoyeon ),이홍주 ( Lee Hongjoo ),장태우 ( Chang Tai-woo ) 한국경영공학회 2016 한국경영공학회지 Vol.21 No.4
This study proposes a new approach on how to analyze business trends from business model patents. From IPC:G06Q(Business Model) patents in mobile industry, we analyzed abstract data using Association-Rule Text Mining and Co-Occurrence Matrix analysis. Those two techniques were complementary to each other, and we could find out the trends of mobile industry. We also suggest CASA plot, which is a great method to illustrate the service trends. It includes the informations of keyword-importance, frequency and centrality. Using CASA plot, we could have a single view of the understanding movement in mobile industry by year.
Lee, Hoyeon,Yang, Zhigang,Wi, Youngjin,Kim, Tae Woo,Verwilst, Peter,Lee, Yun Hak,Han, Ga-in,Kang, Chulhun,Kim, Jong Seung American Chemical Society 2015 Bioconjugate chemistry Vol.26 No.12
<P>An endoplasmic reticulum (ER) membrane-selective chemosensor composed of BODIPY and coumarin moieties and a long alkyl chain (<I>n</I>-C18) was synthesized. The emission ratio of BODIPY to coumarin depends on the solution viscosity. The probe is localized to the ER membrane and was applied to reveal the reduced ER membrane fluidity under ER stress conditions.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/bcches/2015/bcches.2015.26.issue-12/acs.bioconjchem.5b00508/production/images/medium/bc-2015-00508q_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/bc5b00508'>ACS Electronic Supporting Info</A></P>
광주지역 송암산단 환경 대기 중 VOCs 농도 분포와 배출원 추정
황호연 ( Hoyeon Hwang ),박옥현 ( Ok-hyun Park ),장정원 ( Jeong-won Jang ),양윤철 ( Yoon-cheol Yang ),김민진 ( Min-jin Kim ),강창후 ( Changhu Kang ),정희윤 ( Hee-yun Jung ),서광엽 ( Gwang-yeob Seo ),김연희 ( Yunhee Kim ) 한국환경기술학회 2024 한국환경기술학회지 Vol.25 No.2
This study investigated the concentration of Volatile Organic Compounds (VOCs) and identify the impact of associated meteorological factors in Songam Industrial Complex in Gwangju. Accordingly, we performed a factor analysis to estimate the source of VOCs emissions. Findings included a high level of toluene, acetone, butyl acetate, etc. within the Songam industrial complex, the atmospheric conditions near the proximity of the industrial complex and residential areas manifested a resembling trend. The atmosphere of the nearby environment is thought to be affected by VOCs emitted from the industrial complex. The weather factor analysis demonstrated that the distribution of the VOCs concentration affects the velocity of winds. Upon completion of the factor analysis in the industrial complex, the VOCs emissions in the industrial complex were induced by four factors, of which primary factors indicate painting facilities and exhaust gas of diesel vehicles. The factors of VOCs emissions in residential areas showed five, including the painting facilities and exhaust gas from diesel vehicles as primary factors, which is congruent with the factors in the industrial complex.
반응표면분석법을 이용한 항균활성을 가지는 Bacillus subtilis SRCM102046의 균체 증량을 위한 배지 최적화
하광수(Gwangsu Ha),양희종(Hee-Jong Yang),정수지(Su-Ji Jeong),류명선(Myeong Seon Ryu),김진원(JinWon Kim),양호연(HoYeon Yang),신수진(Su-Jin Shin),임수아(Sua Im),서지원(Ji Won Seo),정성엽(Seong-Yeop Jeong),정도연(Do-Youn Jeong) 한국식품저장유통학회 2018 한국식품저장유통학회지 Vol.25 No.5
스트럿-타이 기법에 의한 초고강도 콘크리트 비정형 트러스 구조 디자인
김호연,조창근,양혜주,김민지,채윤하,최종성,Kim, Hoyeon,Cho, Chang-Geun,Yang, Hea-Joo,Kim, Min-Ji,Chea, Youn-Ha,Choi, Jong-Sung 한국공간구조학회 2018 한국공간구조학회지 Vol.18 No.2
In current research, it was attempted a preliminary design and evaluation of non-uniform ultra high-strength concrete (UHSC) truss members. UHSC used here has the compressive strength of 180 MPa, the tensile strength of 8 to 20 MPa, and the tensile strain after cracks up to 2%. By the three-dimensional finite element stress analysis as well as strut-tie approach on concrete solid beams, the non-uniform truss shape of UHSC truss was designed with the architectural esthetic concept. In a series of examples, to compare with conventional concrete members, the proposed UHSC truss members have advantages in capabilities of the slender design with minimum weight with high performances under transverse loadings as well as the aesthetically non-uniform design for spatial structures.
한국산업기술대학교에서의 국제 무인 태양광 자동차 경주대회를 위한 차량 제작
이상민(Sangmin Lee),이건준(Gunjun Lee),양병창(Byungchang Yang),채윤병(Yoonbyung Chae),하태균(Taekyun Ha),이호연(Hoyeon Lee),고광훈(Kwanghoon Ko),차애리(Aeri Cha),이강원(Kangwon Lee) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
최근의 자율 주행 기능의 발전에 발맞추어 지식경제부 후원으로 무인태양광 자동차 경주대회가 2012 년 10 월 개최되어 모두 10 개 대학팀과 한 개 산업체 팀이 참여하였다. 이 논문에서는 한국산업기술대학교 출전 차량에 대해 설명하고자 한다.
반응표면분석법을 이용한 Leuconostoc mesenteroides SRCM201425의 만니톨 생산배지 최적화
하광수(Gwangsu Ha),신수진(Su-Jin Shin),정성엽(Seong-Yeop Jeong),양호연(HoYeon Yang),임수아(Sua Im),허주희(JuHee Heo),양희종(Hee-Jong Yang),정도연(Do-Youn Jeong) 한국생명과학회 2019 생명과학회지 Vol.29 No.8
본 연구에서는 경제성 있는 생물학적 만니톨 고생산을 위해 선별균주의 만니톨 생산 최적화 배지조성을 RSM 방법을 이용하여 확립하고자 하였다. 먼저 김치로부터 분리된 10균주의 만니톨 생산량과 과당으로부터 만니톨 전환율 분석을 통하여 SRCM201425 균주를 선발하였으며, 선발균주는 16S rRNA 유전자 염기서열과 당 발효 분석을 통하여 Leuconostoc mesenteroides로 동정하였다. Plackett-Burman design (PBD)을 이용하여 만니톨 생산에 영향을 주는 배지 인자를 선별하기 위해 총 11개의 탄소원, 질소원, 무기원소의 영향을 조사하였으며, 통계학적 분석을 통하여 최종적으로 fructose와 sucrose, peptone을 선정하였다. 만니톨 생산을 위한 선별된 각 변수의 최적 농도를 결정하기 위한 방법으로 central composite design (CCD)과 반응표면 분석법을 이용하였으며, 최종적으로 CCD를 통해 만니톨 생산을 위한 배지 조성의 최적 농도는 fructose 38.68 g/l, sucrose 30 g/l, peptone 39.67 g/l으로 예측되었으며, 통계학적 분석을 통해 실험모델의 적합성을 확인하였다. 최종적으로 MRS 배지에서의 생산량의 약 20배의 만니톨을 생산할 수 있었으며, 100 g/l의 fructose가 포함된 MRS 배지 대비 97.46%의 만니톨을 생산하면서, 산업화시 기존 배지 대비 생산비용을 크게 절감할 수 있을 것으로 예상되었다. 본 연구를 통하여 만니톨생산을 위한 배지 조성의 최적화를 확립하였으며, 만니톨을 생산하기 위한 방법으로 주로 사용되고 있는 고비용의 촉매환원 방법을 대체할 방법을 제시할 수 있는 기초자료로 활용될 수 있을 것으로 기대된다. This study was undertaken to establish optimum medium compositions for cost-effective mannitol production by Leuconostoc mesenteroides SRCM201425 isolated from kimchi. L. mesenteroides SRCM21425 from kimchi was selected for efficient mannitol production based on fructose analysis and identified by its 16S rRNA gene sequence, as well as by carbohydrate fermentation pattern analysis. To enhance mannitol production by L. mesenteroides SRCM201425, the effects of carbon, nitrogen, and mineral sources on mannitol production were first determined using Plackett-Burman design (PBD). The effects of 11 variables on mannitol production were investigated of which three variables, fructose, sucrose, and peptone, were selected. In the second step, each concentration of fructose, sucrose, and peptone was optimized using a central composite design (CCD) and response surface analysis. The predicted concentrations of fructose, sucrose, and peptone were 38.68 g/l, 30 g/l, and 39.67 g/l, respectively. The mathematical response model was reliable, with a coefficient of determination of R² = 0.9185. Mannitol production increased 20-fold as compared with the MRS medium, corresponding to a mannitol yield 97.46% when compared to MRS supplemented with 100 g/l of fructose in flask system. Furthermore, the production in the optimized medium was cost-effective. The findings of this study can be expected to be useful in biological production for catalytic hydrogenation causing byproduct and additional production costs.