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텍스트 마이닝과 네트워크분석 기반의 공유경제학술 트렌드분석
김성환(Kim, Sung-Hwan),장남식(Chang, Nam-Sik),김건우(Kim, Keun-Woo) 한국창업학회 2021 한국창업학회지 Vol.16 No.2
비즈니스 생태계의 기술 및 사회적 변화로 인해 창업의 분야가 다변화되고 있다. 또한, 창업자들에게 있어 창업 준비단계나 창업 이후에도 최신의 정보기술 및 학술 트렌드에 대한 이해와 반영이 요구되는 시점이다. 본 연구는 공유경제와 관련된 학술 데이터를 기반으로 텍스트 마이닝 기술과 네트워크 분석을 활용하여 공유경제에 대한 학술 동향을 분석하여, 연구동향의 변화를 파악하고자 한다. 먼저, 데이터는 공유경제 동향 분석을 위해 공유경제 키워드가 급증한 2015년 전후로 분류해 데이터를 수집하고 Textom을 사용하여 데이터 전처리를 진행하였다. 데이터 분석은 TF-IDF 분석과 LDA Topic Modeling 기법, 마지막으로 Concor 분석을 수행하였다. TF-IDF 분석과 LDA 토픽 모델링 기법을 통해 실제 공유경제 관련 학술 동향의 핵심 키워드와 동시 출현 빈도가 높은 단어로 구현된 토픽 모델링을 통해 관련 연구의 흐름을 파악할 수 있었고, Concor 분석을 통해 상세히 공유경제 플랫폼의 사용과 관련된 이용 의도와 만족도의 연구가 많이 이루어지고 있다는 것과 공유경제 관련 서비스의 확대 및 연구 분야가 다양해지고 있다는 것을 확인할 수 있었다. 본 연구는 기존 연구와는 달리 텍스트 마이닝과 네트워크 분석의 다양한 기법을 이용해 학술 동향을 분석해 관련 연구의 흐름을 파악하고, 실제 학술 동향을 분석하는 프레임워크를 제안했다는 점에서 의의가 있으며, 창업을 준비하는 예비창업자들에게도 본인이 관심 있는 창업 관련 분야의 학술적인 트렌드의 이해를 통해, 관련 산업의 동향을 파악하는 하나의 방법론으로 사용될 수 있을 것으로 사료된다. Technological and social changes in the business ecosystem are diversifying the field of start-ups. In addition, it is time for founders to understand and reflect the latest information technology and academic trends even after the start-up preparation stage or start-up. This study, based on academic data related to the sharing economy, we used text mining techniques and network techniques. The research trends related to the sharing economy were quantitatively analyzed and focused on the changes in the sharing economy research trends and the topics of interest. In order to analyze trends in the sharing economy, data were collected by classifying it before and after 2015 when keywords for the sharing economy soared. Data preprocessing was carried out using Textom. Data analysis was conducted by TF-IDF analysis, LDA Topic Modeling technique, Concor analysis, etc. Through TF-IDF analysis and LDA Topic Modeling Technique, we were able to identify the trend of research through Topic Modeling of words with high frequency of concurrent appearance with key keywords of actual shared economy-related academic trends, and through Concor analysis, we could see that there are many studies related to the use of shared economy-related services, and that fields are becoming more diverse. This work is significant in that unlike previous studies, we analyzed academic trends using various techniques from text mining and network analysis to identify the flow of related studies and proposed a framework to analyze real academic trends. The limitation is that overseas research data and journal data related to the shared economy could not be added, limiting the scope of the research field. and it is believed that it can be used as a methodology to identify trends in related industries through understanding academic trends in start-up-related fields of interest to prospective start-ups preparing for start-ups.
Round flow control을 통한 개방형 쇼케이스에 관한 수치해석 연구
공명근(Myung Keun Gong),김건우(Gun Woo Kim),오명도(Myung Do Oh) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6
Numerical method was used to assess the energy consumption of vertical open showcase with flow control. Two studies were conducted by applying radius to vertical open showcase. The working fluid was air (Pr = 0.7) and the Reynolds number was 6000 ≤ Reω ≤ 8000. The energy consumption were used to evaluate the improvement of vertical open showcase. As a result it was confirmed that the energy consumption decreased by 10% at radius 40mm. Also, the radius 50mm decreased by 11% more than the Basic open showcase.
쇼케이스 백패널 개공율 구조의 최적화 및 토출부 반경에 따른 수치해석
공명근(Myung Keun Gong),김건우(Gun Woo Kim),오명도(Myung Do Oh) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.11
This study was carried out to confirm the effect of passive flow control applying the radius to the discharge portion and the back panel open ratio. The simulation proceeded with a 2D-steady turbulent flow and numerical analysis was performed on the two cases. The evaluation index of the vertical open showcase can be represented by the entrainment factor. The entrainment factor is the ratio of cooling air to ambient air entering the suction. The first simulation was conducted for the case where the radius was applied to the discharge portion and the case where the radius was not applied to the discharge portion. It was confirmed that a dead zone occurs in the honeycomb region when the radius is not applied to the discharge portion. However, if the radius is applied to the discharge portion, the dead zone in the honeycomb region can be eliminated. As a result, it was confirmed that the entrainment factor decreased by 11% when the radius was applied to the discharge portion. The second simulation was to find the optimal conditions by changing the back panel open ratio. As a result, it was confirmed that the back panel open ratio remained at a similar level at 3.96% or more.
고로슬래그와 나트륨계열 활성화제를 이용한 무시멘트 모르타르의 특성
송진규(Song Jin-Gyu),양근혁(Yang Keun-Hyeok),김건우(Kim Geon-Woo),김병조(Kim Byeng-Jo) 대한건축학회 2010 大韓建築學會論文集 : 構造系 Vol.26 No.6
It has been increasing the demand of Eco-friendly materials which have low environmental effects and consume low energy. Such demands have led the study of alkali-activated ground granulated blast-furnace slag(AAG) mortar and concrete to be developing. In this study it was verified that 13 AAG mortar had been developed the compressive strength. 7 AAG mortar were set. Among them, sodium hydroxide and sodium silicate were shown high strength. So they were chosen to evaluate the compressive strength and the flow value of each contents. And sodium hydroxide or sodium silicate were mixed with another activators for improving performance. Compressive strength of AAG mortar with sodium hydroxide and sodium sulfate or sodium carbonate was increased as compared with AAG mortar using only sodium hydroxide. But setting time was decreased. AAG mortar with sodium silicate and sodium sulfate was improved performance of compressive strength and setting time.
김규수,조용철,김건우 龍仁大學校 武道硏究所 2004 武道硏究所誌 Vol.15 No.1
The purpose of this study is to research player's perception of all Judo teams(equalling to about 515 members, made up of high schools, college, and other Judo leagues) were seperated into categories according to referee's ability, gender, educational level, previous experience, and awards received, in 2003, presently, From the analyses of the data, this study reached the following conclusions: 1) Perception are different the referee's reputation by Judo athlete's sex(p〈.01). But the referee's ability and position assigned are not different according to that. 2) Perception are partially different the referee's reputation(p〈.01) and position assigned(p〈.05) by Judo athlete's education level. But the referee's ability is not different according to that. 3) Perception are partially different the referee's reputation(p〈.01) and position assigned(p〈.05) by Judo athlete's pervious experience. But the referee's ability is not different according to that. 4) Perception are different the referee's reputation by Judo athlete's awards level(p〈.01). But the referee's ability and position assigned are not different according to tha0t.
김재홍,김한중,노영석,김영태,김중환,황규홍,이정덕,백승철,김건우,조상현,김준영,김석민,김영호,김상순,이승한,김방순,전덕규,하상근 대한화학요법학회 1992 대한화학요법학회지 Vol.10 No.2
The prevalence of PPNG among pretreated gonorrhoeae cases isolates at the VD clinic of Choong-ku Public Health Center in Seoul has been studied and reported annually since 1981. In 1990, 162 strains of N.gonorrhoeae were isolated, among which 80 were PPNG. The prevalence of PPNG in Seoul showed increased tendency till 1987, thereafter, it has been stationary.