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페놀의 수산화 반응에 사용한 TS-1 촉매의 효과적인 재생 방법(소성 온도 의존성)
권송이 ( Song Yi Kwon ),윤성훈 ( Song Hun Yoon ),엄경섭 ( Kyung Sub Um ),이재욱 ( Jae Wook Lee ),이철위 ( Chul Wee Lee ) 한국화학공학회 2010 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.48 No.6
In this study, calcination temperature dependence of TS-1 catalyst was investigated in the hydroxylation of phenol with hydrogen peroxide during the regeneration of catalyst. Catalyst was regenerated 5 times by calcining at 550˚C and 700˚C, respectively. When the catalyst was regenerated at 550˚C after 5th regeneration phenol conversion was decreased from 22.9% to 15.1% and at 700˚C after 5th regeneration phenol conversion was decreased from 22.9% to 18.8%. For formation ratio of catechol/hydroquinone was increased from 1.28 to 1.45 after 5th regeneration at 550˚C, and from 1.28 to 1.20 after 5th regeneration at 700˚C. The main reasons for deactivation of the catalyst were suggested by analyzing chemical/physical properties with XRD, UV-vis spectra, N2 adsorption/desorption and TGA, and evaluating the catalytic activity such as phenol conversion and product selectivity.
중년층의 주거만족도가 행복감에 미치는 영향 : 사회관계만족도와 자기효능감의 매개효과를 중심으로
권송이(Kwon, Song-Yi) 한국도시부동산학회(구.도시정책학회) 2021 도시부동산연구 Vol.12 No.3
This study explores how residential satisfaction among middle-aged people living in the metropolitan area affects happiness. Existing studies have considered residential satisfaction as one of the determinants of happiness and found that residential satisfaction has a positive impact on happiness. Our residential environment may affect happiness in itself, but it may also affect happiness through social relationships occurring in the living place and our belief that we live as members of society. Thus we need to consider the mediating effects of social satisfaction and self-efficacy when analyzing the relationship between residential satisfaction and happiness. This study verified a model of happiness based on the human-environmental fit model and the exchange theory. The analysis results are as follows. First, social relationship satisfaction and self-efficacy is fully mediated between residential environmental satisfaction and happiness. Second, housing satisfaction directly affected happiness without the mediating effect of social satisfaction or self-efficacy. To increase happiness, we need to improve housing conditions and the residential environment and actively consider making it a place where social relations can take place.
공업화학(전기화학, 분석화학 포함) 촉매/반응공학 수열 합성법과 마이크로파 가열법으로 제조한 TS-1 촉매에 의한 페놀 수산화 반응: 용매의 영향
권송이 ( Song Yi Kwon ),윤성훈 ( Song Hun Yoon ),이종민 ( Jong Min Lee ),장종산 ( Jong San Chang ),이철위 ( Chul Wee Lee ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.2
Catalytic activity such as conversion and selectivity on the phenol hydroxylation over TS-1 prepared by hydrothermal method and microwave heating method, respectively, was compared and discussed for understanding the dependence of solvent such as water, methanol, acetone, respectively, during phenol hydroxylation, with hydrogen peroxide. Basic physical properties such as XRD, EDS, SEM and N2 adsorption-desorption were determined and compared. The relationship between catalytic activity and physical properties of TS-1 was explained.
차량용 레이다 시스템에서의 LSTM 회귀 모델을 이용한 보행자 경로 예측
전다현,권송이,곽승헌,이성욱 한국전자파학회 2024 한국전자파학회논문지 Vol.35 No.4
본 논문에서는 운전자 안전 시스템을 개선하기 위하여 보행자에 대한 감지 성능을 향상하고, 보행자의 미래 경로를예측하는 방법에 대해 제안한다. 우선 주파수 변조 연속파형 레이다 시스템을 통해 정지된 차량 뒤에서 이동하는 보행자의 거리 및 속도 정보를 추정한다. 이때 보행자의 신호를 검출하기 위하여 cell-averaging constant false alarm rate 알고리즘을 이용해 잡음 환경에서 표적에 대한 신호 성분을 효과적으로 검출했다. 또한 높은 해상도로 표적에 대한 각도를 추정하는 multiple signal classification 알고리즘을 이용하여 최종적으로 보행자의 위치를 추정하였다. 이후, 딥러닝 모델 중하나인 long short-term memory 신경망을 활용하여 정지된 차량 뒤에 가려진 보행자의 이동 경로를 예측한 다음, 차량용시스템에서의 운전자 안전 기능을 위해 차량 뒤에서 걸어 나오는 보행자의 방향을 추정하고 미래 경로까지 예측하였다. 이때 예측한 점과 실제 경로에 대한 점 사이의 유클리드 거리 평균 오차는 약 0.09 m로 계산되었다. In this study, we propose a two-step method to enhance pedestrian detection and driver safety in automotive radar systems. First, we assumed information regarding the range, velocity, and angle of pedestrians behind stationary vehicles using a frequency-modulated continuous wave radar system, with the cell-averaging constant false alarm rate algorithm employed to effectively distinguish between the target signals and noise components. Additionally, a multiple signal classification algorithm was used for the high-resolution angle estimation of the target. Subsequently, a long short-term memory network is applied to predict the movement of a pedestrian, with the results indicating an average error of 0.09 m between the predicted and actual points along the trajectory.
정재은,정슬기,권송이,최혜린,배윤진 한국부모교육학회 2011 부모교육연구 Vol.8 No.2
본 연구는 대학생의 사회경험과 자아탄력성 간의 관계를 알아보고자 하였다. 이를 위해 대구에 위치한 대학교에 재학 중인 대학생 643명을 대상으로 사회경험(아르바이트활동, 봉사활동, 동아리활동)과 관련된 문항과 자아탄력성 척도 문항에 응답하도록 하였다. 주요 연구결과는 다음과 같다. 1)남학생이 여학생보다 자아탄력성이 높았고, 연령이 높은 집단일수록 자아탄력성이 높았다. 2)아르바이트활동 및 봉사활동의 참여 동기에 따라 자아탄력성 점수에 유의미한 차이는 없었다. 3) 아르바이트활동에 적극적으로 임하는 경우 자아탄력성의 하위영역 중 대인관계에 긍정적 영향을 미쳤고 봉사활동의 적극성은 활력성에 긍정적 영향을, 봉사활동에서 느끼는 도움정도는 활력성과 낙관성에 긍정적 영향을 치는 것으로 나타났다.
강경림,윤여진,채송이,권오탁 건강보험심사평가원 심사평가연구소 2021 연구보고서 Vol.2022 No.0
This study is a study to evaluate the effectiveness of the pilot project, and it is a long-term study that starts from the current year and continues until the end of the pilot project. The specific purpose of the study is to design short-term, mid-term, and long-term studies according to each phase of the pilot project, select children participating in the pilot project (participant group) and children who do not participate (control group), and target oral health status (oral examination) for the selected children. and oral health level (knowledge, attitude, perception, behavior) were measured and the results were presented. As a result, female students scored higher in oral health behavior, perception, attitude, and knowledge than male students, and in particular, in oral health behavior and perception, male and female students showed a statistically significant difference. There was no significant difference in oral health behaviors, perceptions, and attitudes according to grade level, but there was a statistically significant difference only in knowledge by grade level (4<sup>th</sup>grade> 5<sup>th</sup>grade>6<sup>th</sup>grade). There was no statistically significant difference in the oral health behaviors, perceptions, and attitudes of the subjects in Gwangju and Sejong, the regions participating in the pilot project. According to the results of this study, when conducting oral health education to adolescents, it is necessary to provide practical education that induces changes in attitudes, behaviors, and perceptions rather than simple knowledge transfer, and guidance for healthy oral care through repeated learning is necessary do.