• 한국지능시스템학회논문지
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• 제15권2호
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• pp.251-256
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• 2005

Up to now, a number of models have been proposed and discussed to describe a wide range of inelastic behaviors of materials. The fetal problem of using such models is however the existence of model errors, and the problem remains inevitably as far as a material model is written explicitly. In this paper, the authors define the implicit constitutive model and propose an implicit viscoplastic constitutive model using neural networks. In their modeling, inelastic material behaviors are generalized in a state space representation and the state space form is constructed by a neural network using input output data sets. A technique to extract the input-output data from experimental data is also described. The proposed model was first generated from pseudo-experimental data created by one of the widely used constitutive models and was found to replace the model well. Then, having been tested with the actual experimental data, the proposed model resulted in a negligible amount of model errors indicating its superiority to all the existing explicit models in accuracy.

• 한국멀티미디어학회논문지
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• 제20권2호
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• pp.196-204
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• 2017

Behavior of intelligent video surveillance system is recognized by analyzing the pattern of the object of interest by using the frame information of video inputted from the camera and analyzes the behavior. Detection of object's certain behaviors in the crowd has become a critical problem because in the event of terror strikes. Recognition of object's certain behaviors is an important but difficult problem in the area of computer vision. As the realization of big data utilizing machine learning, data mining techniques, the amount of video through the CCTV, Smart-phone and Drone's video has increased dramatically. In this paper, we propose a multiple-sliding window method to recognize the cumulative change as one piece in order to improve the accuracy of the recognition. The experimental results demonstrated the method was robust and efficient learning units in the classification of certain behaviors.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제9권3호
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• pp.191-197
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• 2009

Up to now, a number of models have been proposed and discussed to describe a wide range of inelastic behaviors of materials. The fatal problem of using such models is however the existence of model errors, and the problem remains inevitably as far as a material model is written explicitly. In this paper, the authors define the implicit constitutive model and propose an implicit viscoplastic constitutive model using neural networks. In their modeling, inelastic material behaviors are generalized in a state space representation and the state space form is constructed by a neural network using input-output data sets. A technique to extract the input-output data from experimental data is also described. The proposed model was first generated from pseudo-experimental data created by one of the widely used constitutive models and was found to replace the model well. Then, having been tested with the actual experimental data, the proposed model resulted in a negligible amount of model errors indicating its superiority to all the existing explicit models in accuracy.

• 사회복지연구
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• 제48권1호
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• pp.173-206
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• 2017

본 연구는 아동학대와 심리사회적 부적응의 관련성에 주목하여 메타분석을 통해 심리사회적 부적응에 대한 아동학대 각 유형의 영향력을 정리하고자 하였다. 아동학대는 신체 정서 성학대와 방임을 구분하여 분석하였으나 연구물 부족으로 성학대를 제외하였고, 심리사회적 부적응은 내재화 문제행동과 외현화 문제행동으로 범주화하여 분석하였다. 분석대상연구물로는 1990년부터 2016년까지 보고된 총 104편의 논문과 학위논문을 선정하였으며 연구결과는 다음과 같다. 첫째, 내재화 문제행동 전체에 대한 정서 학대, 학대, 신체 학대, 방임의 효과크기는 중간효과크기로 통계적으로 유의한 결과를 보였다. 외현화 문제행동 전체에 대해서도 정서학대, 신체학대, 방임, 학대는 중간크기 효과크기를 보였으며 통계적으로 유의하였다. 둘째, 아동학대 유형별로 살펴보면 정서학대는 내재화 문제행동의 불안, 우울, 불안/우울에서 다른 학대유형보다 상대적으로 큰 영향을 미쳤고, 외현화 문제행동에서는 공격성에서만 영향력이 컸다. 방임은 내재화 문제행동보다 외현화 문제행동에 상대적으로 크게 영향을 미치는 것으로 나타났다. 셋째, 아동학대와 내재화 문제행동의 관계에서 출판물 유형만이 조절효과를 보였으며, 아동학대와 외현화 문제행동의 관계에서는 출판년도, 표본의 수, 출판유형이 조절효과를 나타내었다. 이러한 결과를 토대로 아동학대와 심리사회적 부적응의 관련성을 보고한 기존연구들을 종합하여 시사점을 제시하고 아동학대를 주제로 한 향후 연구방향을 제언하였다.

• 가정과삶의질연구
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• 제19권1호
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• pp.1-16
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• 2001

This study examined the level of experienced problem and related variables of farming women as a part of study on problem diagnosis and status enhancement of rural women. The subjects were 980 married farming women living in rural area. Data were analyzed by frequencies, percentages, mean, standard deviation, factor analysis, t-test, ANOVA, Duncan-test, and multiple regression. The major findings were as follows : 1) Rural women experienced five categorized problems(farming work & health problem, institution & facilities problem, personality differences & communication problem with husband, child & in-law relatives problem, and husbands violence & sexual problem. 2) The significant variables that influenced on experienced problems were conflict coping behaviors, husbands housework participation, farming work time, age, the level of health, and income etc. Additionally socio-demographic factors, their vocational consciousness, housework sharing, and couples difference of sex-role attitude as related variables of the level of experienced problem of farming women were exmained and discussed the implication.

• 수산해양교육연구
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• 제23권4호
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• pp.582-595
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• 2011

The purpose of the study was to investigate the causal relations among attachment, and social support influencing problem behavior in middle school students. The data contains 482 middle school students. Collected data were analyzed using SPSS and AMOS statistical package for correlation analysis and structural equation modeling. Study results were as follows. The correlations among attachment, social support and problem behavior were significant. The results of the structural equation modeling show that students' social support had direct positive influence on problem behavior, but students' attachment didn't have direct positive influence on problem behavior. That is to say, social support mediated the effect of attachment on problem behavior. These results imply that perceived attachment, and social support influence adolescents' problem behavior. Results suggest that programs that promote social support should be given to reduce problem behaviors of middle school students.

• 한국심리학회지 : 문화 및 사회문제
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• 제17권3호
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• pp.343-364
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• 2011

본 연구는 경제적 수준에 대한 어머니의 지각이 어머니의 정신건강, 양육행동 및 유아의 문제행동과 어떤 관계를 갖는지 살펴보고자, 만 3세에서 5세 유아 238명의 어머니와 교사들을 대상으로 수행되었다. 실제 경제수준은 해당연도 보육비 지원정책에 따른 보육비 지원 정도를 기준으로 하였고, 어머니가 지각하는 경제수준, 정신건강(우울/불안) 및 양육행동에 관한 자료는 설문조사를 통해 수집되었으며, 자녀의 문제행동 자료는 어머니와 교사로부터 수집되었다. 실제 경제수준과 지각된 경제수준의 상/하에 따라 네 개의 집단으로 구분하고, 집단 간 어머니의 정신건강, 양육행동 및 유아의 문제 행동에 차이가 있는지 살펴보기 위해 일원변량분석과 사후분석을 실시하였다. 네 개의 집단은 실제와 지각된 경제수준이 모두 높을 경우 '일치고(高)', 둘 다 낮을 경우 '일치저(低)', 실제 경제수준은 높지만 지각된 경제수준은 낮은 경우 '지각저(低)', 마지막으로 실제 경제수준은 낮지만 지각된 경제수준은 높은 경우 '지각고(高)' 집단으로 나뉘었다. 주요 결과로는, 어머니의 우울과 불안에 있어서 일치고(高)와 지각고(高) 집단이 일치저(低)와 지각저(低) 집단보다 양호한 것으로 나타났다. 어머니의 양육행동 중 온정적 양육에 있어서는 일치고(高) 집단이 일치저(저(低)) 집단보다 양호한 것으로 나타났고, 적대적 양육에 있어서는 일치저(低)와 지각저(低) 집단이 일치고(高)와 지각고(高) 집단보다 높은 경향성을 보였다. 유아의 문제행동 증 어머니가 평가한 내재화 문제의 경우 일치고(高)와 지각고(高) 집단이 지각저(低) 집단보다 양호한 것으로 나타났고, 외현화 문제에서는 일치고(高) 집단이 지각저(低) 집단보다 양호한 수준을 나타냈다. 이와 대조적으로 교사가 평가한 문제행동의 경우 내재화와 외현화 모두 집단간 유의한 차이가 나타나지 않았고, 외현화 문제에서 일치저(低) 집단이 지각고(高) 집단보다 양호한 것으로 나타났다.

• 대한가정학회지
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• 제46권9호
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• pp.33-45
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• 2008

The purpose of this study was to investigate the tendency and characteristics of behavior problems in preschool children. The aim was to acquire basic information that could be used in diagnosis and intervention strategies. The target of this study were 823 preschoolers, the reporting on which was conducted through the responses of 81 teachers. Analysis consisted of partitioning behavioral problems by demographic variables in order to ascertain differences by age, sex, and cut-off score of the high risk group. Overall results indicate significant differences in behavioral problems according to socio-demographic variable. The conclusions of this study offer a foundation for diagnosis, intervention, and therapy for preschoolers with problem behaviors.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 춘계학술대회논문집
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• pp.1093-1098
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• 2002

Dynamic behaviors of the Korean High-speed Train(KHST) have been analyzed to investigate the performance on the stability, the safety and the ride comfort. Multi-body dynamics analysis program using Recursive method, called RecurDyn, have been employed in the numerical simulation. To model the wheel-rail contact, the RecurDyn uses its built-in module which uses the square root creep law. The accuracy of the rail module in RecurDyn. however, decreases in the analysis of flange contact because it linearizes the shape of the wheel and rail. To solve this problem, a nonlinear contact theory have been developed that considers the profiles of the wheel and rail. The results show that the KHST still needs more stability. The problem should be solved by the examinations of module and modeling.

• 한국학교보건학회지
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• 제30권1호
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• pp.40-47
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• 2017

Purpose: The purpose of this study was to identify the factors related to eating attitudes of female high school students. Methods: Data were collected from 299 high school girls in 2016. The collected data were analyzed by SPSS/WIN 21.0. Results: There was a positive correlation between eating attitudes and anger thoughts, anger expression, perfectionism, depression, and problem behaviors. There was a negative correlation between eating attitudes and body esteem. The predictors of eating attitudes were perfectionism, body esteem, depression, and problem behaviors, which explained 23.7% of the participants' eating attitudes. Conclusion: The findings of this study suggest that it is necessary to recognize and measure the predictors of eating attitudes in advance and develop school-based health interventions to prevent eating disorders and improve eating attitudes among female high school students.