• 한국멀티미디어학회논문지
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• 제17권9호
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• pp.1104-1114
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• 2014

In large-scale crowd simulations, it is very important for the decision-making system of manipulating interactive behaviors to minimize the computational cost for controlling realistic behaviors such as collision avoidance. In this paper, we propose a large-scale realtime crowd simulation method using the affordance and navigation potential fields such as attractive and repulsive forces of electromagnetic fields. In particular, the model that we propose locally handles the realistic interactions between agents, and thus radically reduces the cost of expensive computation on interactions which has been the most problematic in crowd simulation. Our method is widely applicable to the expression and analysis of various crowd behaviors that are needed in behavior control in computer games, crowd scenes in movies, emergent behaviors of evacuation, etc.

• Tribology and Lubricants
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• 제28권2호
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• pp.62-69
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• 2012

Atomic force microscopy (AFM) has been widely utilized as a versatile tool not only for imaging surfaces but also for understanding nano-scale interfacial phenomena. By measuring the responses of the photo detector due to bending and torsion of the cantilever, which are caused by the interactions between the probe and the sample surface, various interfacial phenomena and properties can be explored. One of the challenges faced by AFM researchers originates in the physics of measuring the small forces that act between the probe of a force sensing cantilever and the sample. To understand the interactions between the probe and the sample quantitatively, the force calibration is essential. In this work, the procedures used to calibrate AFM instrumentation for nano-scale force measurement in normal and lateral directions are reviewed.

• 대한간호학회지
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• 제29권6호
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• pp.1355-1364
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• 1999

Mother and infant relationship has a great influence on child's developments. In this study, nursing intervention to increase maternal sensitivity to the infant's cues was applied to 25 primiparas (Experimental Group). Mother and infant interacations of these primiparas were compared with those of 25 primiparas (Control Group) who did not receive the nursing intervention. Fifty primiparas and infants were recruited from a university hospital, a general hospital, and an OBGY clinic located in Taegu city. Mother and infant interactions were assessed at 6 weeks after birth using videotapes. Feeding situations were videotaped and two trained observers analyzed the tapes. Data were collected from March 23rd to July 27th of 1998. Mother and infant interactions during feeding were assessed by the response rating scale which was modified by the author based on NCAST feeding scale (Barnard, 1978a) and AMIS scale (Price, 1983). The validity of the modified rating scale was verified by faculty members and researchers who previously had research experience in the area. Cronbach's Alpha of the modified scale for this study was .90. The data was analyzed by SAS program, using wilcoxon rank sums test, chi square test, Fisher's exact test, and ANOVA. Findings were as follows: 1. Mothers in the experimental group were more likely to have higher scores in mother and infant interactions during feeding than mothers in the control group. 2. Mothers in the experimental group showed better sensitivity to infant's signals or cues, provided growth fostering, and had higher responsibility to the infant's distress than mothers in the control group. 3. Infants in the experimental group showed higher clarity of cues and responsibility to the mother's behaviors than infants in the control group. 4. Mothers and infants in the experimental group showed higher synchronic responses than mothers and infants in the control group. In conclusion, this study has shown that the applied nursing intervention promoted mother and infant interaction among primiparas. Therefore, this study suggests that the nursing interventions to increase maternal sensitivity to the infant's cues should be broadly applied to primiparas, which can be beneficial to the social, affective, and cognitive developments of their children.

• 대한기계학회논문집B
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• 제22권3호
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• pp.316-325
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• 1998

The objective of this study is to investigate the role of large-scale coherent structures in a spatially developing plane mixing layers. To achieve this, we have to look into the mutual interactions between three-dimensional large-scale coherent structures and the mean flow. Our attention will be focused on the energy exchange mechanism between the various modes, and the effects of the nonlinear evolution of the phases of the interacting modes. Linear stability of the three-dimensional viscous shear layer is formulated and solved as the basis for the solution of the nonlinear formulation based on the energy method. The importance of the initial conditions that may affect the evolution of the flow has been examined. It has been numerically calculated the nonlinear effects arising from the interactions among the three-dimensional large-scale coherent structures in a spatially developing plane mixing layers. The results of this study provide useful parametric information for the control of shear layer in practical applications in the mixing and transport augmentation.

• 융합정보논문지
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• 제10권3호
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• pp.126-133
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• 2020

본 연구의 목적은 유치원 교사의 직무만족도와 삶의 만족도가 교사-유아 상호작용에 미치는 영향을 확인하는 것이다. 이를 위해 경기도, 강원도에 소재한 공·사립 유치원 교사 320명을 대상으로 유치원 교사의 직무만족도, 삶의 만족도, 교사-유아 상호작용을 측정하는 설문에 응답하도록 하였다. 수집된 자료를 토대로 Pearson의 적률상관관계 분석과 중다회귀분석을 실시한 결과는 다음과 같다. 첫째, 직무만족도의 하위요인인 교직의식, 발전성, 혁신성, 자율성, 동료애, 보상이 높을수록 교사- 유아의 상호작용도 높게 나타났으며, 업무부담이 높을수록 언어적 상호작용이 낮게 나타났다. 둘째, 유치원 교사의 삶의 만족도가 높을수록 정서적, 언어적, 행동적 상호작용도 높게 나타났다. 즉, 유치원 교사의 직무만족도 하위변인과 삶의 만족도는 교사-유아 상호작용의 하위변인인 정서적, 언어적, 행동적 상호작용과 정적인 유의한 관계가 있다. 셋째, 교사- 유아 상호작용 전체에 대한 예언변인들의 상대적 영향력은 삶의 만족도(β= .24), 발전성(β= .22), 동료애(β= .16) 순이고, 그 설명변량은 25%인 것으로 나타났다.

• 수산해양교육연구
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• 제28권5호
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• pp.1395-1406
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• 2016

The purpose of this study was to examine the effects of interaction based mother-child art therapy on the change of child and mother's interactions in a child who was in trouble due to attachment problems. The subject in this study was a six-year-old child who faced difficulties in peer relationship building and who were maladjusted to kindergarten because of unstable attachment and negative feedback from his parents. Also, he showed serious problem behaviors at home. The ABA design was adopted among single-subject research designs, and the Target child was observed in the sessions in terms of the subfactors of Marschak's Behavioral Rating Scale to gather data related to the changes of child and mother's interactions. As a result of analyzing the collected data, there were positive changes in all the subfactors that were the child's verbal/nonverbal interactions, the mother's verbal/nonverbal interactions and mother-child interactions. Therefore the interaction based mother-child art therapy that was designed to boost child and mother's interactions was effective at furthering the mother-child interactions of the child with attachment problems.

• 한국심리학회지 : 문화 및 사회문제
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• 제30권1호
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• pp.81-100
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• 2024

본 연구에서는 일상생활에서 노인들이 경험하는 연령주의를 측정하는 일상 속 연령주의 척도(Everyday Ageism Scale: EAS)를 한국어로 번안하고 타당화하였다. 이를 위해 만 60세 이상 성인 남녀 498명을 대상으로 온라인 설문을 진행한 후, 무선적으로 두 집단을 추출해 첫 번째 집단(198명)에서 탐색적 요인분석과 신뢰도 분석을 실시하였고, 두 번째 집단(300명)에서 확인적 요인분석 및 타당도 검증을 실시하였다. 먼저, 탐색적 요인분석과 확인적 요인분석을 실시한 결과, 원척도와 동일한 10개 문항, 3개 하위요인(연령주의적 메시지 노출, 대인관계에서 연령주의, 내면화된 연령주의)이 적절한 것으로 나타났다. 또한 한국어판 일상 속 연령주의 척도(The Korean Version of the Everyday Ageism Scale: K-EAS)의 내적 신뢰도, 수렴타당도, 준거타당도, 증분타당도도 모두 양호한 것으로 확인되었다. 구체적으로 대인관계에서 연령주의와 내면화된 연령주의는 노인차별 피해경험, 노화에 대한 부정적 자기 인식, 우울과 정적 상관이 있는 반면, 노화에 대한 긍정적 자기 인식 및 삶의 만족도와 부적 상관이 있는 것으로 나타났다. 또한, K-EAS가 우울에 대한 명시적인 노인 차별 피해 경험 외에 추가적인 설명량이 있음을 확인했다. 마지막으로, 본 연구의 의의 및 한계점, K-EAS 활용과 향후 연구에 대한 제언을 제시했다.

• 대한기계학회논문집B
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• 제24권11호
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• pp.1523-1534
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• 2000

The performance of a number of existing dynamic subgrid-scale(SGS) models is evaluated in large-eddy simulations(LES) of two prototype transitional and turbulent shear flows, a planar jet and a channel flow. The dynamic SGS models applied include the dynamic Smagorinsky model(DSM);Germano et al. 1991, Lully 1992), the dynamic tow-component model(DTM; Akhavan et al. 2000), the dynamic mixed model(DMM;Zang et al, 1993). and the dynamic two-parameter model(DTPM; Salvetti & Banerjee 1995). The results are compared with those for DNS for their evaluation. The LES results demonstrate the superior performance of DTM with use of a sharp cutoff filter and DMM with use of a box filter, as compared to their respect counterpart DSM, in predicting the mean statistics, spectra and large-scale structure of the flow, Such features of DTM and DMM derive from the construction of the models in which tow separate terms are included to represent the SGS interactions; a Smagorinsky edd-viscosity term to account for the non-local interactions, and a local-interaction term to account for the nonlinear dynamics between the resolved and subgrid scales in the vicinity of the LES cutoff. As well, overall the SGS models using a sharp cutoff filter are more successful than those using a box filter in capturing the statistics and structure of the flow. Finally, DTPM is found to be compatible or inferior to DMM.

• Structural Engineering and Mechanics
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• 제53권3호
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• pp.393-410
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• 2015

Two dimensional numerical models and physical models have been developed to study the highly nonlinear interactions between waves and breakwaters, but several of these models consider the effects of the structural dynamic responses and the shape of the breakwater axis on the wave pressures. In this study, a multi-material Arbitrary Lagrangian Eulerian (ALE) method is developed to simulate the nonlinear interactions between nonlinear waves and elastic seawalls on a coastal rubble mound breakwater, and is validated experimentally. In the experiment, a solitary wave is generated and used with a physical breakwater model. The wave impact is validated computationally using a breakwater - flume coupling model that replicates the physical model. The computational results, including those for the wave pressure and the water-on-deck, are in good agreement with the experimental results. A local breakwater model is used to discuss the effects of the structural dynamic response and different design parameters of the breakwater on wave loads, together with pressure distribution up the seawall. A large-scale breakwater model is used to numerically study the large-scale wave impact problem and the horizontal distribution of the wave pressures on the seawalls.

• 아동학회지
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• 제26권5호
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• pp.331-350
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• 2005

The study examined the effects of an intervention program based on reflective thinking on mother-child interaction behaviors. Three mothers with problematic mother-child interactions and their 4-year-old socially delayed boys participated in the program that consisted of four main activities like journal and video feedback, lectures on interactive strategies, mother-child interactive play and program evaluations and ran for twenty 120 minutes weekly sessions. The level of reflective thought was determined by analyzing interview transcripts, journal entries. The videotaped mother-child interaction behaviors were rated by the Maternal Behavior Rating Scale and Child Behavior Rating Scale. It was concluded that the program enhanced mother's reflection on mother-child interactions and changed interaction behaviors of 3 mother-child pairs positively.