• Nuclear Engineering and Technology
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• v.55 no.3
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• pp.839-849
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• 2023

The development of automation technology to reduce human error by minimizing human intervention is accelerating with artificial intelligence and big data processing technology, even in the nuclear field. Among nuclear power plant operation modes, the startup and shutdown operations are still performed manually and thus have the potential for human error. As part of the development of an autonomous operation system for startup operation, this paper proposes an action coordinating strategy to obtain the optimal actions. The lower level of the system consists of operating blocks that are created by analyzing the operation tasks to achieve local goals through soft actor-critic algorithms. However, when multiple agents try to perform conflicting actions, a method is needed to coordinate them, and for this, an action coordination strategy was developed in this work as the upper level of the system. Three quantification methods were compared and evaluated based on the future plant state predicted by plant parameter prediction models using long short-term memory networks. Results confirmed that the optimal action to satisfy the limiting conditions for operation can be selected by coordinating the action sets. It is expected that this methodology can be generalized through future research.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10b
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• pp.625-628
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• 1999

인간 동작의 애니메이션에 대해서는 지난 30년 동안 애니메이션 연구가들의 많은 관심을 모아 왔다. 최근에는 그 동안의 축적된 연구성과를 바탕으로 영화에 등장하는 인물을 애니메이션으로 처리하기 위한 디지털 액터의 연구가 진행되고 있다. 디지털 액터는 일반적인 휴먼 애니메이션에 의해 요구되는 사실성 면에서 차원을 달리하고 있다. 본 논문에서는 그동안 디지털액터의 모델링 및 애니메이션을 위한 여러 가지 방법들을 검토해 보고, 본인이 속해있는 서울대학교 휴먼애니메이션 연구단에서 수행해 가고 있는 연구테마와 중간 결과들을 소개한다.

• Journal of the Korean association of regional geographers
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• v.9 no.3
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• pp.276-296
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• 2003

This study is to analyze the adoption of environmentally friendly fanning(EFF) by Actor-Network Theory(ANT). ANT declares that the world is full of hybrid entities containing both human and non-human elements and maintains that adoption of an innovation comes as a consequence of the action of everyone in the chain of actors who has anything to do with it. In this study, adoption of EFF will be analysed through the role of actors and networks. And this paper try to identify the intermediaries and obligatory passage point(OPP) in each networks. In study area, 5 actors, -nature, governmental institute, food processors, consumers and farmers-, have each roles in their networks, But only 18 farmers adopted EFF. This study revealed that three OPPs were not overcome in each network. The one is nature, such as water and soil pollution. Another is shortage of reliability between farmers and governmental institute. The other is shortage of information about agricultural commodity trade. And through this application of ANT to the EFF, we contend that ANT can be useful for studies of diffusion of EFF and sustainability of rural systems in situations where interactions of the social, technological and political are regarded as particularly important.

• Korean Journal of Social Welfare Studies
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• v.45 no.3
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• pp.127-150
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• 2014

The purpose of this study was to evaluate the effect of parenting stress on marital conflict in dual earner couples with children in early childhood. Actor and Partner Interdependence Model (APIM) was conducted in order to identify how parenting stress affect husband and wife, respectively and how this make the actor effect as well as the partner effect regarding the marital conflict. The research was conducted with 629 married couples from the forth wave of the Panel Study of Korean Children (PSKC) data. In order to examine the relationships between the variables and to evaluate the appropriateness of the research model, structural equation model was used. The results showed that the parenting stress had significant positive effect on the marital conflict. The partner effect of parenting stress was significantly positive. This result implies that the mutual dependence in dual earner couple's marital conflict and parenting stress should be considered in the process of intervention. In other words, to improve the effectiveness of intervention, practitioners should treat couples together rather than being focused on individuals.

• Journal of Science and Technology Studies
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• v.19 no.2
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• pp.1-40
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• 2019

Built upon ethnographic method such as participant observation and in-depth interview, this study analyzes the material culture of electronic flower auctions at Yangjae Flower Market. From the viewpoint of Actor-Network Theory(ANT), this research examines how human actors like dealers and auctioneers interact with nonhuman actors such as market devices and these interactions form networks called "agencement." This research is focused on three main objectives: first, to study how the performance of auctions - i.e. the interactions between auctioneers and dealers - change in the wake of new market devices in the auctions; secondly, to look into what changes artifacts bring to the social relationships between auctioneers and dealers; lastly, to analyze the influence of new market devices on auction price in the market. The results of this research are as follows. First, the appearance of new market devices generates changes in the performance of auctions, which means the change of 'agencement' of flower auctions. Direct interactions between auctioneers and dealers turned into indirect interactions through new market devices. Moreover, the changes in the agencement brought changes to the identity of auctioneers and dealers. Secondly, the new agencement caused by the inflow of new market devices formed the trust between the devices and human actors, which gave rise to the trust in electronic auction and in counterpart actors as well. In addition, new market devices lowered direct interactions between auctioneers and dealers and thus made more equal relationships between the two than before. Lastly, market devices like trading screen reduced the leverage of auctioneers by providing dealers with bidding information previously possessed by auctioneers much openly and dealers were able to decide auction prices in more reasonable and dispassionate manner. Economic agency, power, trust, price, and information in the market is material and sensory.

• Survey Research
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• v.18 no.4
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• pp.25-59
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• 2017

The current study investigated how elderly husbands and wives' marital satisfaction and depression change over time and examined how changes in marital satisfaction account for changes in depression between and within the dyads. The longitudinal dyadic data from the first wave(2006) to the fifth wave(2014) of the Korean Longitudinal Study of Aging(KLoSA), collected by the Korea Employment Information Service, were used for the analyses. Because husbands and wives are interdependent within couples, we applied statistical models for dyadic data. The dyadic growth model(DGM) was used to model the trajectories of marital satisfaction and depressive symptoms. In order to analyze the association of these growth factors, we proposed the dyadic growth actor-partner interdependence model(DG-APIM) and applied the model to the data. The results showed that on average the husbands' marital satisfaction was higher but decreased faster over the course of the study than the wives'. It also showed that the average depression of the husbands was lower than that of the wives but the husbands' depression increased faster than the wives' over the course of the study. The variance of the averages of husbands' (wives's) depression was accounted for by that of wives'(husbands') marital satisfaction, showing a partner effect. The variance of the slopes of husbands'(wives') depression was accounted for by that of marital satisfaction of themselves, showing an actor effect. The results showed that there is a longitudinal interdependence between husbands and wives' marital satisfaction and depression and supported the marital discord model of depression.

• 한국노년학
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• v.41 no.3
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• pp.421-444
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• 2021

The purpose of this research is to examine the reciprocal relationships between depression and marital satisfaction among older couples. For longitudinal dyadic analysis, this study sets up a research model based on the Actor-Partner Interdependence Model, the Common Fate Model, and Autoregressive Cross-Lagged Model. Data came from four annual waves from the 10th year (2015) to the 13th year (2018) of the Korean Welfare Panel Survey and the final sample comprised a total of 1,383 married couples over 60 years of age in 2015. Structural Equation Modeling identified the reciprocal relationship between depression and marital satisfaction among older couples, with higher marital satisfaction of older couples leading to lower depression of husbands' and wives', and with higher depression of husbands' and wives' inducing lower marital satisfaction of the couples. Thus, this study suggested that longitudinal interplay between depression and marital satisfaction can lead to a vicious cycle. Based on these findings, the need to intervene at both the individual level and the couple level was discussed in order to reduce depression and improve marital satisfaction.

• Korean Journal of Culture and Social Issue
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• v.30 no.3
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• pp.299-319
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• 2024

This study examined the actor-effects and partner-effects of overt narcissism as a personality factor and conflict resolution styles as an interpersonal factor on marital satisfaction among couples. Data were collected from 337 couples through a survey conducted by a research institute. Structural equation modeling and individual mediation effects were verified using the Actor-Partner Interdependence Mediation Model (APIMeM) in the AMOS 28.0 program. The results of this study are as follows: First, both husbands' and wives' extraversion showed direct self-effects on their own marital satisfaction. Additionally, husbands' overt narcissism demonstrated a direct partner-effect on wives' marital satisfaction. Second, overt narcissism in both husbands and wives showed indirect self-effects through conflict resolution styles on marital satisfaction. Higher levels of husbands' overt narcissism influenced wives' maladaptive conflict resolution styles, which in turn affected marital satisfaction for both husbands and wives. This study highlights the importance of husbands' overt narcissism and wives' conflict resolution styles as significant variables influencing marital satisfaction. It suggests that differentiated interventions considering overt narcissism traits and gender-specific characteristics could potentially enhance marital satisfaction for couples.

• Korean journal of communication and information
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• v.66
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• pp.273-297
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• 2014

This paper conducted a survey targeting online Korean drama viewers in Vietnam and Philippines, to investigate the relationships between viewing motivations of Korean drama, general attitude toward Korean drama, and Korea's national image. Factor analyses found six viewing motivations of Korean drama, and the most powerful viewing motivation of Korean drama were entertainment/relaxation(Vietnam) and longing for actor(actress)(Philippines), respectively. In addition, two path analyses showed that viewing motivations had a significant influence on general attitude toward Korean drama. Longing for actor(actress) and entertainment/relaxation motivations were critical factors in both countries' paths, but habit motivation was negatively related to general attitude toward Korean drama. In case of Korea's national image, the results showed that the more positive general attitude toward Korean drama, the more positive images of national image. Conclusions, implications, and limitations were also discussed.

• Journal of Society of Preventive Korean Medicine
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• v.25 no.3
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• pp.101-115
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• 2021

Objectives : This study compares clinical practice students' perception of Clinical Performance Examination (CPX) in a College of Korean Medicine using actors as Actor Standardized Patient (ASP) and enrolled students as Student Standardized Patient (SSP). Methods : Targeting the clinical practice students who completed the clinical practice education in the first semester of the fourth year in the Department of Korean Medicine, a survey was conducted on total six categories such as satisfaction with CPX using ASP and SSP, prior knowledge about clinical practice education, self-evaluation, difficulties in the process of performing the CPX, satisfaction with ASP/SSP, and familiarity with them. Results : In the results of the survey, the mean score of CPX program using SSP was higher than that of CPX program using ASP in every area. Among them, in the satisfaction with CPX itself and prior knowledge about various clinical practice education, the mean score of CPX program using SSP was statistically significantly higher than that of CPX program using ASP. Conclusions : Overall, the clinical practice students' satisfaction with CPX program using SSP was higher than that of CPX using ASP, and statistically significantly higher in some areas.