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Mincheol Kim(김민철),Hae-Jin Kim(김해진),Keun-Hyung Kim(김근형),Dong-Cheol Lee(이동철) 제주대학교 관광과경영경제연구소 2019 産經論集 Vol.39 No.3
Purpose - In this paper, we investigated and analyzed current operations of the entry-level companies that belong to the local Open market so that we drew management strategies of the local Open Market. As a result, the number of entrants will increase when management improves, such as improving the competitiveness of local open markets, and a diverse range of products will be created, which will lead to diverse customer experiences, creating a virtuous circle of ecosystems that will lead to an increase in visitors. Research, design, data, and methodology - The survey was conducted on 739 entry-level companies to analyze the operational status of businesses located in the local open market. We collected data from the entry-level companies by questionnaire, which would be divided into quantitative and qualitative parts. The quantitative part of the questionnaire includes satisfaction, improvement, promotion cost, sales commission, the use for the other Open Market platform and so on. The qualitative part of the questionnaire includes satisfactions, difficulties and improvements. The quantitative data was analyzed by frequency analysis, t-test and ANOVA. The qualitative data was analyzed by Text mining techniques. Results - We derived results as followings. First, we recognized that the entry-level companies would be satisfied wit sales commission. Second, we recognized that the entry-level companies had spent individually the cost for promotion. Third, we confirmed that the entry-level companies had utilized the other Open Market platform. Conclusions - Through the analysis results, we could derive four viewpoints as followings. First, the local Open Market should be managed in being integrated into representative Open Market in order to derive promotion effectiveness, operation efficiency and improvement of brand value. Second, it should be necessary for the integrated promotion strategy of the entry-companies to be established in order to derive efficient and effective promotion. Third, it should be necessary to improve the functions of the Online Open Market platform System to simply the function complexity and support real-time processing. Fourth, it might be possible to raise the sales commission to improve the service functions of the local Open Market. The limitations of this study are as follows. First, the broader usability question did apply only to the public relations, satisfaction, and improvement opinions, which are the priorities of using the platform. Second, surveys of samples biased in some areas indicate that there is a limit to the generalisation of the results.
Kim Dockyu,Chae Namyi,Kim Mincheol,Nam Sungjin,Kim Tai Kyoung,Park Ki-Tea,Lee Bang Yong,Kim Eungbin,Lee Hyoungseok 한국미생물학회 2022 The journal of microbiology Vol.60 No.12
Recent rapid air temperature increases across the northernlatitude tundra have prolonged permafrost thawing and snow melting periods, resulting in increased soil temperature (Ts) and volumetric soil water content (SWC). Under prolonged soil warming at 8°C, Alaskan tundra soils were incubated in a microcosm system and examined for the SWC differential influence on the microbial decomposition activity of large molecular weight (MW) humic substances (HS). When one microcosm soil (AKC1-1) was incubated at a constant SWC of 41% for 90 days (T = 90) and then SWC was gradually decreased from 41% to 29% for another T = 90, the initial HS was partly depolymerized. In contrast, in AKC1-2 incubated at a gradually decreasing SWC from the initial 32% to 10% for T = 90 and then increasing to 27% for another T = 90, HS depolymerization was undetected. Overall, the microbial communities in AKC1-1 could maintain metabolic activity at sufficient and constant SWC during the initial T = 90 incubation. In contrast, AKC1-2 microbes may have been damaged by drought stress during the drying SWC regimen, possibly resulting in the loss of HS decomposition activity, which did not recover even after re-wetting to an optimal SWC range (20–40%). After T = 90, the CO2 production in both treatments was attributed to the increased decomposition of small-MW organic compounds (including aerobic HS-degradative products) within an optimal SWC range. We expect this study to provide new insights into the early effects of warming- and topography-induced SWC variations on the microbial contribution to CO2 emissions via HS decomposition in northern-latitude tundra soil.
김민철 ( Mincheol Kim ),장은식 ( Eunsik Jang ),이도엽 ( Doyeop Lee ),전수곤 ( Sugon Jeon ),김행곤 ( Hangkon Kim ),변태영 ( Taeyoung Byun ),김병창 ( Byeongchang Kim ),서동만 ( Dongmahn Seo ) 한국정보처리학회 2016 한국정보처리학회 학술대회논문집 Vol.23 No.2
동영상이나 게임에서 2차원적인 시야를 제공해주는 물건(컴퓨터, TV, 스크린 등)이나 입체감을 주기위한 3D기술을 사용하여 보는 것에 만족하던 시대가 가고 VR(Virtual Reality)이 등장함으로 인해서 사람들이 점점 가상현실에 대한 환상을 가지고 있다. 본 연구에서는 많은 관심을 받는 VR과 동영상 Converter기술을 합쳐 공포 게임을 만들어 보며, 일반적인 공포 영상이 VR과 접목되면서 가져올 감정 변화가 사람들의 관심을 끌 수 있음을 보이고자 한다.
김기훈(Kihoon Kim),김경호(Kyungho Kim),김형탁(Hyoungtak Kim),이주성(Jusung Lee),신민철(Mincheol Shin),김창원(Changwon Kim),윤진한(Jinhan Yun),이정규(Jungkyu Lee),홍원석(Wonseok Hong) 한국환경에너지공학회 2023 한국열환경공학회 학술대회지 Vol.2023 No.1
선택 적 비촉매 환원법 (Selective Non-Catalytic Reduction)은 소각로의 연소실 내부로 환원제를 주입하여 연소과정에서 발생하는 질소산화물을 제거하는 기술이다. 대부분의 소각시설에서는 환원제로 요소수를 사용하고 있으며, 이류체 노즐을 통하여 분사된 요소수는 연소가스 중 질소산화물을 질소와 수증기로 환원시킨다. 이러한 선택적 비촉매 환원법의 경우에 초기 투자비 및 유지비가 적다는 장점이 있으나 요소수가 액상으로 주입되기 때문에 질소산화물과의 반웅 효율이 낮아 일부 미반응된 요소수가 대기 중으로 배출되는 암모니아 슬립 발생에 대한 문제점이 있다. 또한 계속해서 강화되는 대기오염물질 배출허용기준과 미세먼지 관리 종합대책의 후속 조치로 질소산화물 배출 부과금제가 시행됨에 따라 기존의 소각시설들은 질소산화물의 관리를 강화할 수 있는 현실적인 대책이 필요한 실정이다. 따라서 본 연구에서는 요소수를 기화시킨 후 소각로 내부로 주입하여 암모니아 슬립 발생은 줄이면서 질소산화물의 저감 효율은 극대화하고자 하였으며, 추가적인 가열설비의 구축 없이 소각로에서 발생되는 폐열을 활용하여 이를 구현하고자 하였다. 요소수의 기화 및 주입을 위하여 소각로 잉여 열원의 현황을 파악하고 운영조건을 사전에 검토하였으며, 온도와 압력에 따른 요소수의 기화 특성을 실험적으로 확인하여 설비 제작을 위한 설계 인자를 도출하였다.
터치폰 인터랙션의 플릭(Flick)기능을 위한 터치거리와 시간에 대한 연구
김지혜(JiHye Kim),황민철(Mincheol Whang),김종화(Jonghwa Kim),우진철(Jincheol Woo),김치중(ChiJong Kim),김용우(YoungWoo Kim) 한국HCI학회 2010 한국HCI학회 학술대회 Vol.2010 No.1
본 연구는 모바일 터치 인터랙션 유형 중 사진을 넘기거나 리스트를 올리고 내리는 인터랙션인 플리킹(Flicking)에서 20 대가 선호하는 터치 시작점과 끝점 사이의 거리와 터치 인식 시간을 알아보는 것이 목적이다. 본 연구에서는 디스플레이 사이즈 480cmX800cm Rapid 프로토타입으로 시각 능력에 장애가 없고 터치폰 사용에 불편이 없는 20 대 대학생 남, 여 28 명을 대상으로 실험을 실시하였다. 실험은 가로 방향의 플리킹과 세로 방향의 플리킹으로 총 2 세트로 진행되었으며, 실험 순서는 다음과 같다. 첫 째 터치 시작점과 끝점 사이의 거리를 10 단계로 나누어 화살표로 제시하여 플리킹을 하도록 하였다. 둘 째로 거리 정보를 주지 않고 자유롭게 플리킹을 5 회 실시하도록 하였다. 실험 결과는 20 대 남,여의 플리킹 시 인터랙션하는 거리와, 시간 정보를 각각 평균으로 분석하였다. 또한 가로 플리킹 실험과 세로 플리킹 실험의 두 집단간의 평균 비교를 하기 위해 T-test 를 실시하였다. 본 연구를 통해 20 대 남,여의 평균적인 플리킹 터치 거리와 시간을 알 수 있었으며, 가로 플리킹과 세로 플리킹 모두 남자가 여자보다 터치 시간의 평균이 짧다는 것을 알 수 있었다.
EEG 코히런스에 의한 집중한 손 동작 예측에 관한 연구
우진철(Jincheol Woo),황민철(Mincheol Whang),김종화(Jongwha Kim),김치중(Chijoong Kim),김용우(Yongwoo Kim),김지혜(Jihye Kim),김동근(Dong Keun Kim) 대한인간공학회 2010 大韓人間工學會誌 Vol.29 No.2
The study is to find relative EEG power spectrum and pattern of coherence discriminating attentive and inattentive hand movements. Eight undergraduate students aged from 20 to 27 who had not hand disability participated in this study. Participants were asked to perform visuo-motor task. EEG was measured at C3 in 10~20 international system and four areas orthogonally directed 2.5cm away from C3. Significant result discriminating movement and rest was found through coherence analysis between movement areas or movement area and non-movement area, but was individually different. Because it was anticipated that major factors caused by the differences among individuals were attributed to the attention of the subjects, relative power of alpha and beta bands was identified. As a result, significant relative powers of alpha and beta bands were found in a group of high coherence level, but were not found in a group of low level. Next, participants were divided into two groups according to relative powers of alpha and beta bands. The comparison between two groups was performed. As a result, the coherence of the alpha band in the attentive group was greater than that of the inattentive group. It was found that the coherence of the beta band in the inattentive group was happening. Therefore, individual differences of coherence were influenced by attention. The significant coherence patterns that could discriminate attentive movement and inattentive movement were found.