• Human Ecology Research
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• 제57권3호
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• pp.431-444
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• 2019

This study explored the longitudinal developmental paths of preschooler's external problem behaviors from infancy. Subjects consisted of 205 preschoolers (106 boys, 99 girls aged 4) and their mothers recruited for the 2009 in-depth Panel Study on Korean Children. Data were analyzed by descriptive statistics, correlations, and structural equation modeling using SPSS 18.0 (SPSS Co., Chicago, IL, USA), Amos 18.0 (SPSS Co., Chicago, IL, USA). The results were as follows: Maternal depression at preschooler's age 0 had a direct effect on maternal social parenting style at preschooler's age 0. Maternal social parenting style at preschooler's age 0 had a direct effect on preschooler's effortful control at age 1. Preschooler's effortful control at age 1 had a direct effect on preschooler's external problem behaviors at age 4. Marital conflict at preschooler's age 0 did not have a direct effect on preschooler's effortful control at age 1. The direct effects of maternal depression at preschooler's age 0 on preschooler's effortful control at age 1, and on preschooler's external problem behaviors at age 4 were not significant. In addition, direct effect of maternal social parenting style at preschooler's age 0 on preschooler's external problem behaviors at age 4 was not significant. This study showed that maternal psychological characteristics, marital conflict, maternal social parenting style and preschooler's effortful control in infancy should be considered simultaneously to explain the effect on preschooler's external problem behaviors.

• Advances in concrete construction
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• 제5권5호
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• pp.469-479
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• 2017

Balanced cantilever construction is extensively used in the construction of prestressed concrete (PSC) box-girder bridges. Shear-lag effect is usually considered in finished bridges, while the cumulative shear-lag effect in bridges during balanced cantilever construction is considered only rarely. In this paper, based on the balanced cantilever construction sequences of large-span PSC box-girder bridges, the difference method is employed to analyze the cumulative shear-lag effect of box girders with varying depth under the concrete segments' own weight. During cantilever construction, no negative shear-lag effect is generated, and the cumulative shear-lag effect under the balanced construction procedure is greater than the instantaneous shear-lag effect in which the full dead weight is applied to the entire cantilever. Three cross-sections of Jianjiang Bridge were chosen for the experimental observation of shear-lag effect, and the experimental results are in keeping with the theoretical results of cumulative shear-lag effect. The research indicates that only calculating the instantaneous shear-lag effect is not sufficiently safe for practical engineering purposes.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 2008년도 추계학술논문발표회 논문집
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• pp.235-238
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• 2008

High-rise buildings with stack effect caused by the foreclosure, which significantly delayed the spread of a fire in effects of these stack effect driving force said. In this research on the stack effect of the lobby if the pressurization of the stairwell analysis of the pressure distribution of the CONTAMW. Overall, the pressurization of the lobby makes it stairwell amount of pressure(+) to the zone in pressure designed to prevent the spread of smoke control performance and found that, the way a normal state and sub-pressurization in the stairwell with stack effect of the turbulence Such as the formation of the upper flow, but, in the upper atmosphere with pressurization was formed by the underlying trend.

• 대한인간공학회지
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• 제25권4호
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• pp.103-113
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• 2006

The purpose of this study was to evaluate an effect of the new air traffic control display designed by Ecological Interface Design [EID]. The methodology of EID has not been applied to the development of the air traffic control display so far. To design a new air traffic control display by EID, We implemented Work Domain Analysis about the air traffic control domain and made the Work Domain Model that consisted of the five levels of the Abstraction Hierarchy. We extracted the Information Requirement from the completed Work Domain Model and the extracted information requirements from the model were used to design the new air traffic control display. We evaluated an effect of the new air traffic control display designed by EID. Participants for evaluating consisted of 14 active military air traffic controller of the Republic of Korea Air Force. Experiment was designed two factors within subject. Factors manipulated in the experiment included displays type to compare the existing type with the new ecological interface type and included complexity to compare the effect of the high complex situation with the effect of the low complex situation. Response time about questions with relation to air traffic collision situation, accuracy, and subjective work load were measured. The results reveled that EID type's display has a significant effect on response time, accuracy, and subjective work load and verified that EID could be applied to the air traffic control domain that is more complex and dynamic.

• 수산경영론집
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• 제47권4호
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• pp.65-75
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• 2016

The purpose of this study was to analyze the production and marketing control effects of aqua-cultured flounder required for stable income growth of aqua-cultured household. We analyzed the supply and demand structure of cultured flounder using the partial equilibrium model approach. And we estimated the optimal yield of cultured flounder and analyzed the effect of marketing control through constructed model. The main results of this study are summarized as follows. First, the fitness and predictive power of the estimated model showed that the RMSPE and MAPE values were less than 5% and Theil's inequality coefficient was very close to 0 rather than 1. It was evaluated that the prediction ability of the aqua-cultured flounder supply and demand model by dynamic simulation was excellent. Second, dynamic simulation based on policy simulation was conducted to analyze the price increase effect of production and shipment control of cultured flounder. As a result, if the annual production volume is reduced by 1%, 5%, and 10% among 32,852~37,520 tons, it is analyzed that the price increase effect is from 1.2% to 12.5%. Finally, this study suggests that the production and marketing control can increase the price of aqua-cultured flounder in the market. In this paper, we propose a policy implementation of the total supply system instead of conclusions.

• Korean Journal of Acupuncture
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• 제20권2호
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• pp.77-92
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• 2003

Objective; This study was investigated to test the anti-anemic effects of Danggwibohyeol-tang for herbal acupuncture on rat with anemia induced by phenylhydrazine according to composition ratio. Methods; Danggwibohyeol-tang herbal-acupuncture was administered into Kyoksu(膈兪穴, BL17) and RBC, Hemoglobin, Hematocrit, MCV, MCH, MCHC, RDW, platelet, MPV, PDW, indirect bilirubin and lactate dehydrogenase were tested. Results; The obtained results are summarized as follows: (1) In control group RBC was significantly reduced in comparison with normal group. And in Danggwibohyeol-tang group A, B, C there was significant inhibitory effect on reduction in comparison with control group. The effect of Danggwibohyeol-tang group C was similiar to that of Danggwibohyeol-tang group B and was higher than that of Danggwibohyeol-tang group A. (2) In control group hemoglobin was significantly reduced in comparison with normal group. And in Danggwibohyeol-tang group A, B, C there was significant inhibitory effect on reduction in comparison with control group but there was no significant difference between Danggwibohyeol-tang group A, B, C. (3) In control group hematocrit was significantly reduced in comparison with normal group. And in Danggwibohyeol-tang group A, B, C there was significant inhibitory effect on reduction in comparison with control group. The effect of Danggwibohyeol-tang group C was higher than that of Danggwibohyeol-tang group A or B. (4) In case of MCV, MCH, MCHC and RDW there was no significant anti-anemic effect. (5) Danggwibohyeol-tang group significantly inhibited the growth of platelet. In case of Danggwibohyeol-tang A and B group there was more inhibitory effect than Danggwibohyeol-tang C group but there was no significant difference between Danggwibohyeol-tang A and B group. (6) In case of MPV, PDW and indirect bilirubin there was no significant difference between Danggwibohyeol-tang group and control group. (7) Danggwibohyeol-tang group significantly inhibited the growth of lactate dehydrogenase. In case of Danggwibohyeol-tang C group there was more inhibitory effect than Danggwibohyeol-tang B group and Danggwibohyeol-tang B group showed more inhibitory effect than Danggwibohyeol-tang A group. Conclusion; From above results Danggwibohyeol-tang for herbal acupuncture showed significant anti-anemic effect in some parameters. Further study is needed for the effect of Danggwibohyeol-tang according to different composition ratio.

• 아동학회지
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• 제35권6호
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• pp.65-78
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• 2014

The purpose of this study was to examine the relationships between preschooler's sex, effortful control, working memory, and emotion regulation. The moderating effect of sex in the influences of effortful control and working memory on emotion regulation was also investigated. Eighty-eight children from the ages of 3 to 5 years participated in this study. A working memory task of the Korean Wechsler Intelligence Scale for Children IV(K-WISC-IV; Kwak, Oh, & Kim, 2011) was administered to the children. Their parents completed a very short form of the Children's Behavior Questionnaire(Putnam & Rothbart, 2006) and Emotion Regulation Checklist(Shields & Cicchetti, 1997). The results indicated that effortful control significantly predicted emotion regulation. Additionally the moderating effect of sex on the relationship between working memory and emotion regulation was significant. Specifically, the influence of working memory on emotion regulation was significant only in boys, but not in girls. This result suggested that effortful control has an effect on emotion regulation in a stable manner whereas working memory has different effects on the influence of emotion regulation according to sex.

• Structural Engineering and Mechanics
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• 제10권6호
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• pp.517-532
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• 2000

A direct output feedback control scheme was recently proposed by the authors for single-story building structures resting on flexible soil body. In this paper, the control scheme is extended to mitigate the seismic responses of multi-story buildings. Soil-structure interaction is taken into account in two parts: input at the soil-structure interface/foundation and control algorithm. The former reflects the effect on ground motions and is monitored in real time with accelerometers at foundation. The latter includes the effect on the dynamic characteristics of structures, which is formulated by modifying the classical linear quadratic regulator based on the fundamental mode shape of the soil-structure system. Numerical result on the study of a $\frac{1}{4}$-scale three-story structure, supported by a viscoelastic half-space of soil mass, have demonstrated that the proposed algorithm is robust and very effective in suppressing the earthquake-induced vibration in building structures even supported on a flexible soil mass. Parametric studies are performed to understand how soil damping and flexibility affect the effectiveness of active tendon control. The selection of weighting matrix and effect of soil property uncertainty are investigated in detail for practical applications.

• 한국간호교육학회지
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• 제15권2호
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• pp.302-310
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• 2009

Purpose: The purpose of this study was to examine the attachment of middle school students to their parents, their self-control, problem behavior, and the mediating effect of self-control on the relationship between parent-adolescent attachment and problem behavior. Method: Data were collected by questionnaires from 467 students in middle schools from May 19 to 30, 2008. Data were analyzed by Pearson's correlation coefficient and multiple regression procedures. Result: 1. The students investigated received a mean score of 2.76 and 3.01 on attachment for fathers and mothers respectively. They received a mean score of 3.32 on self-control. The most prevalent self-perceived problem behavior among the students was going home late at night without permission followed by bullying friends for no reason and drinking. 2. Among parent-adolescent attachment, self-control and problem behavior, parent-adolescent attachment had a positive correlation to self-control and a negative correlation to problem behavior. 3. Self-control had a mediating effect on the relationship between parent-adolescent attachment and problem behavior. Conclusion: Parent-adolescent attachment influenced problem behavior through the mediating effect of self-control, and is expected to lay the foundation for the prevention of adolescent problem behavior.

• 아동학회지
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• 제35권1호
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• pp.119-133
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• 2014

The purpose of this study is to examine the effects of time perspective, self-control and cellular phone addiction on academic procrastination, and to cellular phone addiction has any mediating effects in relation to the effects of adolescents' time perspective and self-control on academic procrastination. For this study, a survey was conducted with total 651 students in middle and high schools. Those who omitted responses or answered in ways which were otherwise invalid were excluded and finally, questionnaires responded to by 558 students were analyzed. Employing SPSS Win 12.0, average value, standard deviation, frequency analysis, Pearson's correlation analysis, stepwise multiple regression analysis, and simple linear regression analysis were used for the purposes of statistical analysis. In conclusion, first, explanations were made in order of future-oriented time perspective which is subordinate domain of view of time perspective, self-control, and cellular phone addiction. Second, it was found that cellular phone addiction has partially mediating effect on the relationships between future-oriented time perspective which is a subordinate area of adolescents' time perspective, and academic procrastination. Third, it was found that cellular phone addiction has partially mediating effect on the relationships between adolescents' self-control and academic procrastination.