• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2008년도 추계학술대회 논문집
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• pp.285-287
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• 2008

This paper represents the electric power load leveling effect of the Light Control System(LCS). The lighting of typical mid-large commercial buildings is the major factor of daytime electric power consumption. Since the national peak power demand occurs in between 11:00 and 16:00, the dimming control of light can contribute the decrease of the power demand We will discuss the load leveling effect of dimming control with LCS.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국제학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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• pp.993-998
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• 1988

Adaptive control system has evolved as an attempt to avoid degradation of the dynamic performance of a control system when environmental variations occurs. While the feedback control system is oriented toward the elimination of the effect of state perturbations, the adaptive control system is oriented toward the elimination of the effect of structural perturbation, upon the performances of the control system. The model reference adaptive controller is utilized in velocity loop controller for positioning and tracking is designed based on the linear decoupled dynamics.

• 가정과삶의질연구
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• 제25권4호
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• pp.169-179
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• 2007

The purpose of this study was to examine the effect of mother's psychological control, children's behavioral autonomy and self control on children's behavioral problems(depression, anxiety, withdrawal, and aggression). The subjects were 293 6th graders residing in Cheonan. It was found that children's perceptions of mother's psychological control was significantly related with the level of children's depression, anxiety, withdrawal, and aggression. In addition, Children's behavioral autonomy was significantly predictor of depression and anxiety. Children's depression and aggression were influenced by self control of children. Finally the relative effect of mother's psychological control, children's behavioral autonomy and self control on problems behavior were as follows. Children's depression and anxiety were predicted by mother's psychological control. The other side withdrawal problem. was influenced by mother's psychological control on boys, by self control on girls. The children's aggression was influenced by self control in all cases.

• 대한가정학회지
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• 제39권8호
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• pp.37-52
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• 2001

The purpose of this study was to explore the relationships of mother's childrearing behavior, children's behavior problems, locus of control and peer victimization. The subjects were 360 children of 4th and 6th grade and their mothers. The instruments were Peer Victimization Scale, CBCL, Locus of Control Scale for Children, Childrearing Behavior Scale. The major findings of this study were as follows; (1) The type of peer victimization had a significant difference between girls and boys. That is, boys were more focused on overt victimization than girls. There was no significant gender difference in relational victimization, And there was no significant grade difference in overt and relational victimization. (2) Mother's rejection-restriction childrearing behavior, children's social withdrawal behavior problems, extemal locus of control predicted children's peer victimization. 24% of the variance of children's peer victimization was explained by these variables. (3) Mother's rejection-restriction childrearing behavior was the first contribution factor and had a direct and indirect effect through children's locus of control on children's peer victimization. And children's social withdrawal behavior problems was second contribution factor and had a direct effect on children's peer victimization. Children's locus of control had a direct and indirect effect through children's social withdrawal behavior problems on children's peer victimization. Mother's warmth-acceptance and permissiveness-nonintervention childrearing behavior had indirect effect through children's locus of control on children's peer victimization.

• 한국정보기술학회 영문논문지
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• 제8권2호
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• pp.101-110
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• 2018

This paper introduces feedback linearization (FL) based adaptive sliding mode control (ASMC) effective against ground effects of the quadrotor UAV. The proposed control has the capability of estimation and effective rejection of those effects by adaptive mechanism, which resulting stable attitude and positioning of the quadrotor. As output variables of quadrotor, x-y-z position and yaw angle are chosen. Dynamic extension of the quadrotor dynamics is obtained for terms of roll and pitch control input to be appeared explicitly in x-y-z dynamics, and then linear feedback control including a ground effect is designed. A sliding mode control (SMC) is designed with a class of FL including higher derivative terms, sliding surfaces for which is designed as a class of integral type of resulting closed loop dynamics. The asymptotic stability of the overall system was assured, based on Lyapunov stability methods. It was evaluated through some simulation that attitude control capability is stable under excessive estimation error for unknown ground effect and initial attitude of roll, pitch, and yaw angle of $30^{\circ}$ in all. Effectiveness of the proposed method was shown for quadrotor system with ground effects.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2004년도 추계 학술대회논문집
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• pp.115-119
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• 2004

The effect of a continuous blowing or suction on an oscillating 2-D NACA0012 airfoil was investigated numerically for the dynamic stall control. The influence of control parameter variation was also studied in the view point of aerodynamic characteristics. The result showed that the blowing control kept a higher lift drag ratio before stall angle but the dynamic stall angle was not exceed to without control result. As the slot position was closer to leading edge, the positive control effect becomes greater. The stronger jet and the smaller jet angel made more favorable roles on the control performance. In the cases of the suction, the overall control features were similar to those of the blowing, but dynamic stall angle was increased, i.e. suction was more effective to control dynamic stall. It was also founded that the suction control was showed better control effect as the slot position moves to trail edge within thirty percentage of chord length. In the simulation for the jet strength and the jet angle control, the same tendencies were observed to those of blowing cases.

• 사상체질의학회지
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• 제19권2호
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• pp.155-169
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• 2007

1. Objectives This study aimed to investigate the anti-oxidative effect of Nocyongdaebo-tang (NYD) decoction in oxidized rats induced by AAPH. 2. Methods AAPH (2.2-azobis-2 aminodinopropane-hydrochloride) was injected intraperitoneally to induce oxidization and NYD was orally administered to the rats. To observe the anti-oxidative effect of NYD, we performed blood chemistry analysis, histological analysis, and evaluated the levels of SOD, catalase, glutathione, NO and MDA in liver. 3. Results & Conclusions 1) Serum Albumin level was increased significantly in the NYD group as compared with the control group and the saline group. 2) Serum LDL-cholesterol level was reduced significantly in the NYD group as compared with the control group. 3) GPT level in liver was reduced significantly in the NYD group as compared with the control group. 4) SOD, catalase activity and glutathione levels were increased significantly in the NYD group as compared with the control group and the saline group. 5) The levels of NO and MDA were reduced significantly in the NYD group as compared with the control group. 6) The degenerative change of liver tissue of NYD group was decreased in comparison with the control group. In conclusion, NYD decoction is considered to have an anti-oxidative effect in rats.

• 유통과학연구
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• 제17권11호
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• pp.81-92
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• 2019

Purpose: The salesperson, the core of the operating activities, plays the role of connecting the inside and outside of the company, representing the company to the consumer and identifying and responding to the customer's needs. The department store industry is the most representative retail industry in South Korea, and competition among its peer group and industry is intensifying, requiring differentiated service sales activities and performance from its employees. This study divided the sales force system into activity control(process-oriented control) and output control(performance-oriented control) and verified the differential impact on the job attitude of the salesperson (e.g., job satisfaction and burn-out), respectively. In addition, the effect of job satisfaction and burn-out of the salesperson on the job performance were checked. Research design, data, and methodology: The survey was conducted on 200 sales people working at five branch stores of Hyundai department store in Seoul, and 194 of them were analyzed. The reliability and validity of the variables were analyzed and hypotheses were verified through the SEM. Results: Results have shown that activity control has a greater impact on burn-out compared to output control, and output control has a greater impact on job satisfaction compared to activity control. It has been shown that the salesperson's burn-out does not affect sales performance, but that job satisfaction has a positive effect on sales performance. Conclusions: This study examines the effect of sales force management system such as activity control and output control, on the job attitude and sales performance in department stores. According to the results of this research, each of two control systems have a discriminatory effect on the job attitude variables. For the sales managers of department store, it is recommended to increase the efficiency of sales management by increasing the use of outcome control compared to activity control.

• 산업기술연구
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• 제28권B호
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• pp.167-174
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• 2008

In this paper, the analysis on type effect of inverter output voltage distortion on the control of an induction motor is discussed. The inverter output voltage is distorted differently from the reference voltage owing to the inverter nonlinear characteristic. The inverter nonlinear characteristic results from the voltage drop, the inherent characteristic of the power semiconductor, and the dead time for preventing the short circuit of the inverter leg. This characteristic distorts the inverter output voltage and then, causes the motor flux estimation error. Although this characteristics do not significantly effect in the general-purpose induction motor control, but significantly effect on the low-speed operation of high performance motor control such as the sensorless vector control.

• 한국통신학회논문지
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• 제19권8호
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• pp.1475-1484
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• 1994

본 논문은 2중 문턱값을 갖는 우선순위 스케쥴링 알고리즘과 버퍼의 히스테리시스 특성을 이용한 트레픽 제어기법을 제안하였다. 2중 문턱값을 갖는 우선순위 스케쥴링 알고리즘은 HOL과 QLT를 적용하였다. 버퍼의 히스테리시스 특성을 이용한 트래픽 제어기법으로는 히스테리시스성 QLT 알고리즘과 히스테리시스성 트래픽 유입제어를 제시하였다. 2중 문턱값을 갖는 동적 우선순위 스케쥴링 알고리즘이 기존의 QLT 알고리즘보다, 셀손실율과 평균지연에 있어서, 우수함을 컴퓨터 시뮬레이션을 통해 고찰하였다. 또 히스테리시스성 QTL 알고리즘과 트래픽 유입량 제어기법은 단일 문턱값을 이용한 방식보다 각각 효율이 개선됨을 알 수 있었다.