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기혼중년남성의 가족탄력성이 스트레스 대처행동에 미치는 영향
이희윤,박정윤 한국가족관계학회 2011 한국가족관계학회지 Vol.16 No.2
The purpose of this study was to examine the influence of married middle-aged men`s family resilience upon their stress coping behavior. The study subjects were 301 married middle-aged men between the ages of 40-54. The results were as follows. First, the extent of family resilience was above the middle level. Among the stress coping behavior, rational action presented the highest average score. Second, among the sub-variables of family resilience, the influential variables upon the coping behavior of stress were belief system`s family coherence, positive perspective, the flexibility of morality, religion and organizational pattern, connectivity, family resources, communication-oriented mutually cooperative problem-solving, clarity and emotional coping. There was significant difference in the coping behavior in response to stress by groups. When family resilience was higher, the men responded to stress rationally. Third, among the variables of family resilience, organizational pattern had the highest influence upon the coping behavior in response to stress, followed by belief system, communication and marriage status in that order. The groups of proper formation of family norm and proper reorganization of family structure, proper exchange of information within family circles and first-marriage coped with stress rationally.
이희윤,김석 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
In this present work, we introduced a PDDA coated on graphene oxide/ sulfur (PDDA-GO/S) composites for lithium-sulfur battery and demonstrate that conducting polymer coated on graphene oxide sheets can effectively induce chemical interaction of sulfur on the surface carbon framework and serves as a good electron conductive framework. The electrochemical performances of PDDA-GO/Sand RGO/S composites were investigated by using cycle voltammetry test measurement. Our investigation is that the PDDA-GO/S cathodes show excellent coulombic efficiency (>95%), cycling stability (60% retention within 100 cycle), and a good capacity of around 740 mAh g<sup>-1</sup> after 100 cycle.
MODEL BASED AUTOMATED CALIBRATION FOR SHIFT CONTROL OF AUTOMATIC TRANSMISSION
이희윤,구본현,차석원,임원식 한국자동차공학회 2021 International journal of automotive technology Vol.22 No.2
In order to improve shift characteristics of an automatic transmission (AT), it is necessary to control and optimize the hydraulic pressure profile of a clutch. More than 8 speed ATs have been developed recently; thus, considerable time and human resource are required to calibrate the parameters. Herein, we propose a model-based automatic calibration method of clutch hydraulic pressure for an AT. The automated calibration method proposed in this study aims to develop a process that can automatically perform the base tuning of clutch control parameters for shift control, which is performed by experts now at the stage of transmission development. The proposed calibration method consists of a simulation model including an AT, analysis algorithm for vehicle simulation, and automated calibration algorithm based on an optimization process, in which iterative simulations and analysis processes are conducted. This study focuses on the power-on shift, and the simulation results show that the base mapping of the hydraulic pressure profile of a clutch can be successfully and effectively performed.