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차효정,Jiaqiang Li,Yifan Li,김슬옹,김윤희,권순기 한국고분자학회 2020 Macromolecular Research Vol.28 No.9
Here we report a polymeric semiconductor (ODATT) comprising alkoxy anthracene (ODA) and thienothiophene (TT) polymerized by stille coupling reaction with the Pd catalyst. The optical properties of the polymer:PC71BM blend films are used by the UV-Visible absorption spectroscopy. The ODATT blends with PC71BM exhibit a maximal power conversion efficiency of 2.2% via thermal annealing treatment. Morphological analysis of the polymer:PC71BM blend films demonstrate the influence of ODATT polymer segregation on device performance by atomic force microscopy and transmission electron microscopy. We confirmed that ODATT has enhanced fill factor after thermal annealing treatment from the reduced series and shunt resistance from morphological enhancement.
Stiffness Modeling of a Soft Finger
차효정,고경철,이병주 제어·로봇·시스템학회 2014 International Journal of Control, Automation, and Vol.12 No.1
This paper presents the design and stiffness modeling of a new 3 DOF soft finger mechanism using a spring as a backbone. The mechanism consists of a spring and 3 cylinders, which behave like joints. To control each joint, wires of different length are penetrated into the cylinders which have small holes in their cross-sectional areas, and each joint can be controlled by pulling each wire. Also, the stiffness modeling is conducted to measure the softness of the finger mechanism as well as to estimate the actuator size. First, the forward kinematics is solved by using the geometry of mechanism, and length of wires and Jacobian are obtained. In order to evaluate the efficiency of the proposed mechanism, the position control, the flexibility and safety, and the stiffness model are verified through experimental work.
주관적 생활수준 및 인식이 중・고령 여성의 삶의 만족도에 미치는 영향 : 경상남도 사회조사를 중심으로
차효정 한국발육발달학회 2022 한국발육발달학회지 Vol.30 No.4
This study analyzed the factors on the effect of subjective living standards and perceptions on life satisfaction of middle-aged and elderly women to prevent deterioration in quality of life and to successfully live a long life. The analysis results are as follows. First, it was found that the life satisfaction of middle and old women in Gyeongsangnam-do felt general satisfaction, and the life satisfaction differed according to region, age, type of residence, residential form, degree of education, and marital status. Second, it was found that there was a difference in life satisfaction according to the presence or absence of disease, suicidal thoughts, parents' survival, and subjective social class. Third, it was found that medical service satisfaction, family relationship satisfaction, safety satisfaction, and environmental satisfaction had a positive(+) effect on life satisfaction, and among them, family relationship satisfaction had the most influence on life satisfaction. In the above research results, it was confirmed that there was a difference in life satisfaction of middle-aged and elderly women according to demographic characteristics and current life. This study is meaningful in that it identified and verified the factors that influence subjective living standards and perceptions on life satisfaction of middle-aged and elderly women.