Performance evaluation of rotating photoelectrocatalytic reactor for enhanced degradation of methylene blue

조혜경,서현수,주현규,김종오,윤재경 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.10

Enhanced oxidation of organic pollutant, methylene blue (MB) was conducted using a newly designed rotating photoelectrocatalytic process (PECP), compared with photocatalysis. A significant synergy of photoelectrocatalytic reaction was observed such that the degradation of methylene blue (MB) by the photoelectrocatalytic mode was 80% higher than that (61.6%) of photocatalytic mode. To confirm the potentials in the application of water treatment, the effects of various parameters affecting reaction performance were studied with the newly designed rotating photoelectrocatalytic reactor consisting of TiO2 nanotubes and Ti lath as the photoanode and cathode, respectively, for applying electrical potential under UV irradiation. As the result of parameter studies, such as applied electrical potential (voltage), UV light intensity, rotating speeds, the highest degradation efficiencies of MB were achieved at 2.5 V or less (electrical potential), 90 rpm (rotating speed), and higher UV intensity. In addition, the stability and activity of TiO2 nanotubes electrode were studied through repeated experiments and showed a good performance, excellent stability, and reliability in the rotating photoelectrocatalytic process (PECP). This study provides an basis for the development of a rotating PECP to water treatment.

敎育大學 學生의 科學的 資質에 關한 基礎調査

車載璇,曹惠卿 仁川敎育大學 科學敎育硏究所 1980 科學敎育硏究所論文集 Vol.7 No.-

마그마의 生成과 結晶作用

曺惠卿 仁川敎育大學校 科學敎育硏究所 1986 科學數學敎育年報 Vol.3 No.-

블랙홀(black holes)의 정체

조혜경 仁川敎育大學校 科學敎育硏究所 1992 科學數學敎育年報 Vol.8 No.-

스크린골프장 서비스공정성이 관계품질에 미치는 영향

조혜경,이정학,이지혜 한국골프학회 2019 골프연구 Vol.13 No.4

[목적] 스크린골프장에서 제공하는 서비스와 관련하여 고객이 지각하는 서비스공정성이 관계품질에 어떠한 영향을 미치는지에 분석 규명하는데 그 목적이 있다. [방법] 본 연구의 목적달성을 위해 서울, 경기 소재의 스크린골프장 10 군대의 이용객을 대상으로 스크린골프장 서비스공정성이 관계품질의 만족, 신뢰, 몰입에 긍정적인 영향관계가 있을 것이라는 과정 하에 연구 모형을 설정하였다. [결과] 도출된 결과를 살펴보면 첫째, 스크린골프장 서비스공정성의 하 위요인 중 분배공정성은 만족, 신뢰에 유의한 영향을 미치는 것으로 나타났다. 둘째, 스크린골프장 서비스공정성의 하위요인 중 절차공성성은 신뢰, 만족에 유의한 영향을 미치는 것으로 나타났다. 셋째, 스크린골프장 서비스공정성 하위요인 중 상호작용공정성은 몰입, 만족에 유의한 영향을 미치는 것으로 나타났다. [결론] 연구결과를 통해 고객들 은 스크린골프장에서 받은 서비스가 공정하다고 판단될 때 스크린골프장의 서비스에 만족, 신뢰하고 있으며, 또한 직원과 고객과의 원활한 커뮤니케이션은 스크린골프장의 좋은 이미지로 보일 수 있는 중요한 요인으로 활용될 수 있 을 것으로 판단된다. [Purpose] The purpose of this study was to analyze and identify the impact of perceived service justice on the relevant premises in relation to the service provided by the screen golf. [Method] To achieve the purpose of this research, a research model was set up for the users of 10 screen golf stores located in Seoul and Gyeonggi Province under the process that the service justice of the screen golf would have a positive impact on the satisfaction, trust and commitment of related qualities. [Result] First, subfactor of service justice, ‘distributive justice’ had positive influence on trust and satisfaction. Second, subfactor of service justice, ‘procedural justice’ had positive influence on trust and satisfaction. Third, subfactor of service justice, ‘interaction fairness justice’ had positive influence on commitment and satisfaction. [Conclusion] Research shows that consumers are satisfied with and confident in the services they receive at the screen golf, when they found themselves receiving fair service. Also, smooth communication between employees and customers can be important factor for bringing good image of the screen golf.

低知能 兒童의 科學過程에 關한 硏究 : 觀察 測定 推理能力을 中心으로

曺惠卿 仁川敎育大學 科學敎育硏究所 1976 科學敎育硏究所論文集 Vol.3 No.-

敎大生의 學業成就水準에 관한 硏究

李鏞律,曺惠卿 仁川敎育大學校 1985 論文集 Vol.19 No.2

로봇의 연속경로이동을 위한 효율적인 알고리즘에 관한 연구

조혜경 漢城大學校 1996 論文集 Vol.20 No.1

본 논문에서는 로봇이 직선 또는 원호로 구성된 여러 개의 경로를 차례로 이동하는 경우, 인접한 두 경로를 부드러운 곡선으로 연결하며 정지하지 않고 이동할 수 있게 하는 효율적인 경로계획 방법을 제시한다. 제안된 알고리즘은 각 경로에 대한 독립적인 궤적계획 결과에 최소한의 수정을 가한후 이들의 벡터합을 이용하여 중간 경로를 발생시키므로, 별도의 계산이 필요 없어 실시간 응용에 적합하다. 또한, 프로그램 된 경로에서 합성된 중간 경로로 전이하는 위치나 합성 경로에서 다음 경로로 복귀하는 위치가 속도와 무관하므로 사용자가 대략의 합성 경로를 예측하기 쉽다는 장점이 있다.

PBL(Problem-Based Learning) 활용 수업에서 자기규제학습 능력에 따른 성취도, PBL 학습요소별 인식의 차이 및 성취도와 인식차의 관계 분석

조혜경 이화여자대학교 교육대학원 2002 이화교육논총 Vol.12 No.-

The purpose of this study was to serve as an empirical basis for determining the impact of the self-regulated learning on achievement and learning element recognition in PBL-based instruction when PBL complied with the learning principles of constructivism is applied to school instruction. The research questions were posed as below: 1. Does the self-regulated learning capabilities of learners make any difference to their academic achievement in PBL-based instruction? 2. Does the self-regulated learning capabilities of learners make any difference to their recognition of learning elements in PBL-based instruction? 3. Does the self-regulated learning capabilities of learners make any difference in PBL-based instruction to learning factors affecting achievement? The findings of this study were as below: First, regarding Research Question 1 about the impact of self-regulated learning capabilities on academic achievement in PBL-based instruction, the learners who had the best self-regulated learning capabilities (hereinafter called the to-ranking group) scored significantly higher in PBL achievement than the learners who had the average and poor learning capabilities(hereinafter called the average-ranking group and the lower-ranking group respectively)(F(2, 158)=10.821, p<.05). Second, concerning Research Question 2 on the influence of self-regulated learning capabilities on the recognition of learning elements in PBL-based instruction, their opinions on cooperative learning, self-directed learning, process-centered evaluation and instruction satisfaction were not significantly different(p>.05), but their view of the authenticity of the problems varied significantly(F(2, 158)=3.079, p<.05). This showed that self-regulated learning capabilities made them perceive the same situation in different way, even though the problems turned out to be highly authentic by specialists. Third, as to Research Question 3 about the impact of self-regulated learning capabilities of learners on their recognition of individual learning components influencing achievement, the data collection factor exercised an only significant impact on the achievement of the average group (t=2.32, p<.05). The other learning components didn't have any significant influence on achievement, no matter what their self-regulated learning capabilities were. For every learner, the overall PBL achievement also was found to be affected by the data collection factor, regardless of self-regulated learning capabilities. 20.9%(R2=.209) of the total achievement change in the top-ranking group resulted from their perception of learning components, and this factor brought 18.8%(R2=.188) change to the achievement of the lower-ranking group, and 15.9% change(R2=.159) to that of the average group. The lower-ranking group was more affected in achievement by this factor than the average group. As a whole, the recognition of learning component gave 11.3%(R2=.113) impact on the achievement of the entire learners, regardless of self-regulated learning capabilities. This finding showed that between the recognition of problem authenticity and of data collection that differed significantly with self-regulated learning capabilities, the academic achievement was directly affected by the data collection factor. Consequently, it's needed to consider how learners could be able to utilize information more efficiently as a strategy to improve academic achievement.

세계민주주의 : 글로벌 경제위기가 남긴 교훈

조혜경 민주화운동기념사업회 2012 계간 민주 Vol.2 No.-