• 아동학회지
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• 제38권2호
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• pp.51-66
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• 2017

Objective: This study aimed to examine the dual mediating effects of preschoolers' emotional temperament and emotion regulation in the relationship between maternal emotional expression and preschoolers' behavior problems. Methods: The participants included 167 preschoolers and their mothers from Daegu city and Gyeonsang province. The mothers completed questionnaires regarding their own emotional expression, children's temperament, emotion regulation, and behavior problems. Results: The primary results of this study were as follows. First, there were significant correlations among maternal emotional expression, preschoolers' emotional temperament, emotion regulation, and problem behaviors. Second, maternal emotional expression had an indirect effect on preschoolers' behavior problems through preschoolers' emotional temperament and emotion regulation. Conclusion: This study revealed that maternal negative emotional expression and preschoolers' temperament and emotion regulation need to be considered simultaneously to explain the level of preschoolers' behavior problems. More specifically, the results highlight the dual mediating effects of preschoolers' temperament and emotion regulation in the relationship between maternal negative emotional expression and preschoolers' behavior problems.

• Journal of Power Electronics
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• 제16권5호
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• pp.1802-1812
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• 2016

Cross regulation is a key technical issue of single-inductor multiple-output (SIMO) DC-DC converters. This paper investigates the cross regulation in single-inductor dual-output (SIDO) Buck converters with continuous conduction mode (CCM) operation. The expressions of the DC voltage gain, control to the output transfer function, cross regulation transfer function, cross coupled transfer function and impedance transfer function of the converter are presented by the time averaging equivalent circuit approach. A small signal model of a SIDO CCM Buck converter is built to analyze this cross regulation. The laws of cross regulation with respect to various load conditions are investigated. Simulation and experiment results verify the theoretical analysis. This study will be helpful for converter design to reduce the cross regulation. In addition, a control strategy to reduce cross regulation is performed.

• 한국병원경영학회지
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• 제22권4호
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• pp.102-112
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• 2017

[purpose] This study was conducted to identify how a hospital's outsourcing workers' QWL influences Turnover Intention and to determine Dual Commitment cause any discrepancies in regards to the link between QWL and Turnover Intention. [Methodology/Approach] The study is based on 254 survey sheets answered by outsourcing employees working at general hospitals with more than 300 beds in Seoul and the methods of analysis used are as follows: reliability analysis, correlation analysis, multiple regression analysis, and hierarchical regressions analysis. [Findings] The study results First, analyzing how different types of QWL (individual, organizational, managemental) influence Turnover Intention, R2 turned out to be 30.7% and organizational factors and managemental factors show a statistically significant difference. In addition, organizational and managemental factors have negative effects on Turnover Intention while that of organization factors has a bigger influence. Second, verifying regulation effects of Dual Commitment in regards to the link between QWL and Turnover Intention, it is learned that Dual Commitment (hiring firm) has no regulation effects on the link. However, it does have a regulation effect on the link between QWL (managemental) and Turnover Intention. Moreover, after verifying regulation effects of Dual Commitment (client's firm), it is learned that it has regulation effect on the link between QWL (organizational and managemental) and Trunover Intention. [Practical Implications] In conclusion, lower Turnover Intention, it is necessary to impose tasks that suit the employees' competence and to encourage efficiency throughout clear communications and accurate directions.

• 미생물학회지
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• 제38권4호
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• pp.239-239
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• 2002

• Biomolecules & Therapeutics
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• 제28권6호
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• pp.503-511
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• 2020

Autophagy is a major catabolic process that maintains cell metabolism by degrading damaged organelles and other dysfunctional proteins via the lysosome. Abnormal regulation of this process has been known to be involved in the progression of pathophysiological diseases, such as cancer and neurodegenerative disorders. Although the mechanisms for the regulation of autophagic pathways are relatively well known, the precise regulation of this pathway in the treatment of cancer remains largely unknown. It is still complicated whether the regulation of autophagy is beneficial in improving cancer. Many studies have demonstrated that autophagy plays a dual role in cancer by suppressing the growth of tumors or the progression of cancer development, which seems to be dependent on unknown characteristics of various cancer types. This review summarizes the key targets involved in autophagy and malignant transformation. In addition, the opposing tumor-suppressive and oncogenic roles of autophagy in cancer, as well as potential clinical therapeutics utilizing either regulators of autophagy or combinatorial therapeutics with anti-cancer drugs have been discussed.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• 제5B권2호
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• pp.181-188
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• 2005

In this paper, a DC smoothing filterless soft switching pulse modulated high frequency AC power conversion circuit connected to utility. frequency AC power source is proposed for consumer induction heating hot water producer, steamer and super heated steamer. The operating principle of DC link filterless utility frequency AC-high frequency AC (HF AC) power conversion circuit defined as high frequency cycloinverter is described, which can operate under a principle of ZVS/AVT and power regulation based on alternate asymmetrical PWM in synchronization with the utility frequency single phase AC positive or negative half wave voltage. The dual mode modulation control scheme based on high frequency PWM and commercial frequency AC voltage PDM for the proposed high frequency cycloinverter are discussed to enlarge its soft switching commutation operating range for wide HF AC power regulation. This high frequency cycloinverter is developed for high frequency IH Dual Packs Heater (DPH) type boiler used in consumer and industrial fluid pipeline systems. Based on the experiment and simulation results, this high frequency cycloinverter is proved to be suitable for the consumer use IH-DPH boiler and hot water producers. The cycloinverter power regulation and power conversion efficiency characteristics are evaluated and discussed.

• 한국분무공학회지
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• 제16권2호
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• pp.97-103
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• 2011

The electronically controlled diesel engine was converted to dual fuel engine system. Test engine was set up for investigating the power output, thermal efficiency and emissions. ND 13-mode tests were employed for the engine test cycle. The emission result of dual fuel mode meets Euro-4 (K2006) regulation and the engine performance of dual fuel engine was comparable to the performance of diesel engine. To estimate economical efficiency, test vehicles have been operated on a certain driving route repeatedly. Fuel economy, maximum driving distance per refueling and driveability were examined on the road including free ways. Developed vehicle can be operated over 500 km with dual fuel mode and shows 80% of diesel substitution ratio. Driveability of dual fuel mode is similar with that of diesel mode.

• 전기전자학회논문지
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• 제18권2호
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• pp.220-227
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• 2014

이 논문은 Dead-time을 갖는 톱니파 발생기를 이용하여 공통모드와 차동모드 피드백 루프를 구현한 Single-Inductor Dual-Output DC-DC Converter 설계에 관한 내용을 제시하고 있다. 제어회로에는 공통모드와 차동모드 피드백 루프를 Dead-time을 갖는 톱니파 발생기를 이용하여 동시에 사용하였다. 차동모드 피드백 루프에서 duty를 생성하기 위해서 전류 분배기 회로를 사용하여 공통모드 피드백에 의한 duty에 따라 dead-time이 유동적으로 변하는 톱니파형을 만드는 회로인 Dead-time을 갖는 톱니파 발생기를 추가하여 차동모드 피드백 회로를 구성하였다. 0.35um 공정을 사용하여 설계한 SIDO DC-DC Converter는 2.5V 입력으로부터 2.8V와 4.2V의 전압을 출력하며 최대 전력변환 효율은 95%이다. 출력간의 Cross regulation은 출력전류가 2배씩 증가할 경우 Boost1과 Boost2의 출력전압은 각각 3.57%, 4% 수준을 보이고 있다.

• Bulletin of the Korean Chemical Society
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• 제30권5호
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• pp.1190-1192
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• 2009

• 한국대기환경학회지
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• 제13권3호
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• pp.215-220
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• 1997

CNG dual fuel engine for heavy duty diesel engine developed by AFS International in Canada has been equipped to a Korean city bus engine and tested to compare the engine performance and the emission characteristics with the existing diesel fueled engine. Also the dual-fuel engine was applied to the city bus for road test. The results are summarized as follows. Performance optimization has been carried out to have engine power equivalent to or better than the diesel fueled engine. Smoke is decreased by 85% by Korean smoke 3 mode test. By 13 mode test CO is increased by 453% and THC is increased by 2, 086%. NOx is decreased by 7% in laboratory. D-13 test mode was changed in 1996 Korean regulation. Even though THC is increased very much, it's not too serious problem since CO and HC emission of diesel engine is very little compared to gasoline engine and more than 75% of THC is CH$_4$. But the reduction technologies of CO and HC has to be considered.