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반응표면분석법을 이용한 염색폐수의 광촉매 산화 처리조건의 최적화
조일형 ( Jo Il Hyeong ),박재홍 ( Park Jae Hong ),김영규 ( Kim Yeong Gyu ),이홍근 ( Lee Hong Geun ) 한국물환경학회 2003 한국물환경학회지 Vol.19 No.3
In order to treat the dyeing wastewater, the UV/TiO₂/H₂O₂ system was investigated, and proper protreatment methods were examined to reduce the load on the system considering economical and techical efficiency. Also, to obtain the maximize the removal efficiency of dyeing wastewater, optimal operating conditions for the photocatalytic degradation were investigated by using the responsed surface methodology(RSM) . The independent variables were TiO₂ dosage, H₂O₂ concentration and removal efficiency of dyeing wastewater was dependent variable. With the 2²-factional factorial experimental design, 11 experiments were carried out at various condition, with 4 factorial points, 3 center points and 4 axial points. Maximum removal efficiency(85%) of dyeing wastewater was obtained at TiO₂ dosage(1.82g/L), H₂O₂ concentration (980㎎/L) for photocatalytic oxidation reaction(20min).
사회적기업의 사회적 가치 측정을 위한 평가 지표 개발과 적용에 관한 연구: 환경 분야를 중심으로
조일형(Jo, Ill Hyung),이미영(Lee, Me Young),김성재(Kim, Sung jae) 한국서비스경영학회 2021 서비스경영학회지 Vol.22 No.1
This study aims to develop a valuation method and measurement index that can evaluate the excellence of social enterprises in the environmental field. In this study, a wide range of previous studies related to social value measurement were reviewed, and a basic approach to measuring the social value of social enterprises in the environmental field was discussed. In addition, it examined the concept and type of environmental value pursued by social enterprises in the environmental field, and developed a value evaluation index reflecting it from the perspective of a balanced scorecard (BSC). The effectiveness of the developed indicators was verified through simulated evaluation and conclusions were drawn by analyzing the differences between the results of measuring the values of general enterprises, existing social enterprises, and social enterprises in the environmental field.
빅데이터를 활용한 홈트레이닝 인식 분석 : COVID-19 확산시점을 중심으로
권재윤(Kwon, Jae-Yoon),조일형(Jo, ll-Hyung),최경근(Choi, Kyong-Keun) 한국체육과학회 2021 한국체육과학회지 Vol.30 No.2
The purpose of this study was to examine the awareness of home training focusing on the spread of COVID-19 to use big data techniques based on big data. As a keyword for data search, ‘COVID-19 home training’ was searched as a keyword, and the top 30 keyword were analyzed to compensate for the limitations of network simplification and network visualization centering on important nodes in entire network. The data analysis period was conducted from April 4 to October 4, 2020 because of the point of spread of COVID-19, and the semantic connection network and N-gram network analysis were conducted in stages. The main analysis results of the study were as follows. First, looking at the top 10 words extracted based on the keyword of COVID-19 home training, home training (2,791), Corona19 (2,036), exercise (1,101), living only at home (1045), non-face-to-face exercise (567), visited PT (440), health promotion (409), health (402), application (397), recommended for one day (395). Second, as a result of conducting N-gram network craft, Corona19/home training (523), home training/overcoming (288), home training/Corona19 (244), Corona19/non-face-to-face exercise (201), home training/diet (195), social/injury (192), senior/home training(189), diet/elderly(189), home training/trainer(166), smart home training home training(163). At the time of the spread of Corona19, we were able to explore how home training was perceived.
기술수용모형 및 행위자 인지적 접근을 활용한 대기환경정보제공서비스의 수용경로분석 - 서울시 대기환경정보제공서비스를 중심으로 -
서인석(Inseok Seo),남기동(Kidong Nam),조일형(Ilhyung Jo) 한국지방행정학회 2016 한국지방행정학보 (KLAR) Vol.13 No.1
This study was pursued from the critical standpoint that the previous studies on the aspect and perceptions of Seoul City’s citizens were insufficient considering that the technology use policies of the city are continuously increasing. Regarding the basic logic of the technology acceptance model and Seoul City air and environment information support service, the causes and effects were determined based on their theoretical relationship after book examination on the factors that were additionally considered. After this, structural analysis was conducted using the structural equation method, and a statistically significant result was found. Some important research results were found in this study, as follows. First, the factor of social isomorphism was confirmed as the variable directly affecting the intention to use. Next, the factors of social isomorphism and personal innovativeness were confirmed as the external variables. Lastly, the route between the perceived ease of use and the perceived usefulness was not statistically meaningful.