• Journal of the Korean Academy of Child and Adolescent Psychiatry
• /
• v.28 no.3
• /
• pp.168-173
• /
• 2017

Objectives: Adolescent depression is a complex disorder influenced by a variety of personal and familial factors. In this study, we compared the familial, cognitive, and behavioral characteristics of adolescents with and without diagnosed depression. Methods: Forty adolescents with depressive disorder were recruited from two psychiatric clinics, along with 46 healthy adolescents from a middle school and a high school. We then compared the participants' cognitive and behavioral characteristics and the child-rearing attitudes of their parents. Results: Compared to the healthy adolescents, the adolescents with depression exhibited lower self-esteem, higher emotional reappraisal, greater disruptive behavior, and lower attention. Furthermore, compared to the mothers of the healthy adolescents, the mothers of those with depression reported less affective, less autonomic, and more rejecting parenting attitudes towards their children. Conclusion: We found that attentional problems, negative parenting attitudes, negative self-cognition, and expressive suppression are all associated with adolescent depression. Parenting education and interventions appear to be needed to correct the negative cognitions of adolescents with depression.

• 제어로봇시스템학회:학술대회논문집
• /
• 1999.10a
• /
• pp.57-60
• /
• 1999

An optimal control technique designed for simultaneous tracking and quality control for batch processes. The proposed technique is designed by transforming quadratic-criterion based iterative learning control(Q-ILC) into linear quadratic control problem. For real-time quality inferential control, the quality is modeled by linear combination of control input around target qualify and then the relationship between quality and control input can be transformed into time-varying linear state space model. With this state space model, the real-time quality inferential control can be incorporated to LQ control Problem. As a consequence, both the quality variable as well as other controlled variables can progressively reduce their control error as the batch number increases while rejecting real-time disturbances, and finally reach the best achievable states dictated by a quadratic criterion even in case that there is significant model error Also the computational burden is much reduced since the most computation is calculated in off-line. The Proposed control technique is applied to a semi-batch reactor model where series-parallelreactions take place.

• Journal of Institute of Control, Robotics and Systems
• /
• v.21 no.5
• /
• pp.482-489
• /
• 2015

CSTR (Continuous Stirred Tank Reactor) which plays a key role in the chemical plants exhibits highly nonlinear behavior as well as time-varying behavior during operation. The control of CSTRs in the whole operating range has been a challenging problem to control engineers. So, a variety of feedback control forms and their tuning methods have been implemented to guarantee the satisfactory performance. This paper presents a scheme of designing a nonlinear PID controller incorporating with a GA (Genetic Algorithm) for the temperature control of a CSTR. The gains of the NPID controller are composed of easily implementable nonlinear functions based on the error and/or the error rate and its parameters are tuned using a GA by minimizing the ITAE (Integral of Absolute Error). Simulation works for reference tracking and disturbance rejecting performances and robustness to parameter changes show the feasibility of the proposed method.

• Journal of the Institute of Electronics Engineers of Korea SP
• /
• v.39 no.1
• /
• pp.40-48
• /
• 2002

Three-Dimensional scene reconstruction from images acquired with different viewpoints is possible as estimating Fundamental matrix(F-matrix) that indicates the epipolar geometry of two images. Correspondence points required to calculate F-matrix of two images include noise such as miss matches, so generally it is hard to calculate F-matrix accurately. In this paper, we classify noise into two types; outlier and minute noise. we propose SSOR algorithm that estimate F-matrix effectively. SSOR algorithm is rejecting outlier step by step in a noise environment. To evaluate the performance of proposed algorithm we simulated with synthetic images and real images. As a result of simulation we show that proposed algorithm is better than conventional algorithms.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2000.06a
• /
• pp.1596-1600
• /
• 2000

We propose a novel adaptive feed forward controller (AFC) design method for rejecting the effect of micro actuator resonance in the design of dual-stage actuator servo systems for disk drives. Microactuator's resonance is one of important issues in dual-stage actuator servo, which varies up to ${\pm}10%$ per product and even during operation. We derive an adaptive algorithm for the proposed AFC design, which turns out to be identical to the delayed-x LMS algorithm which is a special form of the filtered-x LMS algorithm. In the algorithm, coefficients of the AFC are adapted by the residuals of constrained structure defined in such a way that the coefficients become time invariant. Contrary to the conventional AFC, it considers the phase delay of closed-loop transfer function at resonance frequency for system stability. We also apply an adaptive algorithm with frequency tracking capability. The frequency tracking algorithm is induced by the orthogonality of AFC coefficients. Computer simulations are carried out to demonstrate effect of the proposed AFCs.

• Korean Journal of Child Studies
• /
• v.28 no.2
• /
• pp.251-265
• /
• 2007

Participants in this study were 1.245 4th and 5th graders and their parents from 8 elementary schools in Seoul, Daejeon, and Pusan. Using the Korean Youth Self-Report (K-YSR), children's behavior problems were measured and assigned to either clinical or normal groups. Between group differences were that the educational level of mothers of internalizing girls was lower than that of normal girls. Girls with internalizing problems had more siblings than normal girls. Parents of both boys and girls with either internalizing or externalizing problems were more rejecting and/or permissive than parents of children without behavior problems. Fathers of children with behavior problems perceived more marital conflicts, while mothers whose children have behavior problems had more negative family-of-origin experiences compared to parents of normal children.

• Journal of Korean Academy of Fundamentals of Nursing
• /
• v.25 no.1
• /
• pp.68-77
• /
• 2018

Purpose: The aim of this study was to establish a hypothetical model on silence regarding patient safety and to verify the model's goodness of fit and hypotheses. Methods: The participants in this study were 330 registered nurses working in tertiary hospitals with over 300 beds. Data were collected between July 1, and August 30, 2017, from nurses who agreed to participate. A covariance structure analysis was performed. Results: The model of fit index was $x^2=59.54$, normed $x^2=2.29$, GFI=.97, AGFI=.93, SRMR=.05, NFI=.99, CFI=.95 and RMSEA=.05. The organizational culture had an influence on patient safety motivation (${\beta}=.26$, p=.003) and attitude (${\beta}=.43$, p<.001). RN-MD collaboration had an influence on patient safety motivation (${\beta}=.33$, p<.001), attitude (${\beta}=.35$, p<.001), and patient safety silence (${\beta}=-.17$, p=.026). Supervisory trust had an influence on patient safety motivation (${\beta}=.26$, p<.001), attitude (${\beta}=.12$, p=.036), and patient safety silence (${\beta}=-.23$, p=.002). Patient safety motivation had an influence on patient safety silence (${\beta}=-.33$, p=.006). The model of patient safety silence explained 36.0% of the variances. Conclusion: This study is meaningful in that it provides basic data for nursing education and program development for rejecting patient safety silence.

• Journal of Ocean Engineering and Technology
• /
• v.19 no.2 s.63
• /
• pp.82-89
• /
• 2005

This study deals with the development of the extended Kalman filter(EKF) algorithm for the localization of underwater mining vehicles. Both simulation and experimental studies in a test bed are carried out. For the experiments, a scale dawn tracked vehicle is run in a soil bin containing cohesive soil of bentonite-water mixture. To develop the EKF algorithm, we use a kinematic model including the inner/outer track slips and the slip angle for the vehicle. The measurements include the inner and outer wheel speeds from encoders, the heading angle from a compass sensor and a fiber optic rate gyro, and x and y coordinate position values from a vision system. The vision sensor replaces the LBL(Long Base Line) sonar system used in the real underwater positioning situations. Artificial noise signals mimicking the real LBL noise signal are added to the vision sensor information. To know the mean slip values of the tracks in both straight and cornering maneuver, several trial running experiments are executed before applying the EKF algorithm. Experimental results show the effectiveness of the EKF algorithm in rejecting the sensor measurements noise. Also, the simulation and experimental results show close correlations.

• Journal of Families and Better Life
• /
• v.16 no.4
• /
• pp.1-16
• /
• 1998

this study examined the correlates of adult attachment focused on internal working models of 201 housewives. Findings indicated that 68.3% of subjects were classified as secure whereas 27.5% as avoidant and 4.2% as anxious. Greater security was associated with slightly less avoidance while greater anxiousness was associated with slightly greater avoidance. That is subjects who possessed more security tended to be less avoidant while subjects who possessed more anxiousness tended to be more avoidant. The primary characteristics classifying subjects into those three attachment styles were feelings about closeness dependence and anxiousness in relationships with others. Adult attachment was related in theoretically expected ways to one's history of attachment and parenting. Secure subjects were more likely to report warm/responsive parental caregiving style than insecure styles. Insecure subjects in comparison with secure subjects perceived their mothers as cold inconsistent and ot very responsive. Anxious subjects dscribed their fathers as cold and rejecting. The secure attachment style in comparsion with insecure styles was associated with positive mental models of self and social world indicating greater self-esteem positive beliefs about self and others positive relationships with their children greater marital satisfaction and greater secure attachment to their husbands. These results suggest that internal working model offers a useful perspective on adult attachment.

• Membrane and Water Treatment
• /
• v.7 no.6
• /
• pp.507-520
• /
• 2016

The effect of ZnO on cellulose acetate in the removal of benzophenone-3 (BP-3) was investigated. The benzophenone-3 (BP-3) which is an endocrine disrupting chemical (EDC) was completely removed (100%) from the drinking water using Cellulose Acetate (CA) and zinc oxide (ZnO) composite membranes. The membranes were prepared by DIPS method and the filtration experiments were conducted by dead end filtration unit. The macrostructure of the membrane were studied by ATR-IR and XRD Spectra's. Atomic force microscopy (AFM) and Scanning electron microscopy (SEM) were used to study the micro properties of the membranes. The laboratory experiments such as water uptake study and pure water flux performed to confirm the increasing hydrophilicity. The enhancing hydrophilicity was confirmed with respect to higher the concentration of nanoparticles. Evaluation of BP-3 removal was carried in different experimental conditions, such as, different Trans membrane pressure and different concentration of feed. The membrane with low pressure showed better performance by rejecting 100% of BP-3. However, 1 ppm, 3 ppm and 6 ppm of feed solution was used and among them 3 ppm of feed solution gives 100% rejection. The ZnO nanoparticales enhances the performance of CA membrane by showing maximum rejection.