• TTA Journal
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• s.174
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• pp.60-61
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• 2017

우리는 살면서 크고 작은 수많은 사건을 목도한다. 시험에 떨어진다거나 보이스 피싱을 당한다거나 하는 사소한 사건부터 사회 전체를 무력감에 빠트리는 대규모 참사까지. 그 수많은 사건을 보며 마음속으로 부질없는 그러나 간절한 가정을 해본다. 그 모든 사건의 순간을 미리 꿈으로 꾸는 누군가가 있다면? 그래서 그 사건이 일어나기 전에 그 누군가가 미리 경고를 해준다면, 그 비극들을 막을 수 있지 않을까?

• Proceedings of the Korea Society for Simulation Conference
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• 1999.04a
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• pp.237-241
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• 1999

본 논문은 이산사건 시스템 모델링에 관계대수를 이용함으로써 이산사건 시스템 모델을 시뮬레이션 할 때 data consistency를 보장하는 방법을 다룬다. 복잡한 이산사건 시스템은 모델링 및 분석에 형식론적인 프레임웍이 필요하며 모델의 추상화와 재사용이 용이한 DEVS형식론이 널리 사용되고 있다. 본 논문에서는 DEVS 형식론으로 기술된 모델을 정보의 손상 없이 관계대수형 모델로 변환하여 관계대수형 이산사건 모델로써 이용하는 방법론을 제시한다.

• ICROS
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• v.6 no.3
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• pp.68-81
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• 2000

본 논문에서는 최근 10여년간 세계적으로 많은 관심과 더불어 비약적인 연구발전을 이루어 온 이산사건시스템의 관리제어에 있어서 기본적인 이산사건모델링과 관리제어이론을 설명하고최근의 연구동향 등을 소개한다. 또한 기존의 연속변수시스템과 대비해 이산사건시스템의 동적특성을 알아보고 구체적인 사례들을 살펴본다. 이러한 이산사건시스템의 동적특성을 기술하기 위해 형식언어이론에 기초한 논리적 이산사건모델을 소개하고 그 위에서 관리제어이론의 개념을 설명하나다 그리고 제어가능성 및 관측가능성의 관리제어기 존재조건을 토대로 관리제어기의 구현에 대해 알아본다 마지막으로 현재까지 수행되어온 관리제어에 대한 다방변의 연구 활동을 살펴보고 앞으로의 연구방향을 전만해 본다

• The KIPS Transactions:PartB
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• v.12B no.1 s.97
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• pp.81-90
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• 2005

In this paper, we propose a novel approach which models multilingual story link detection by adapting the features such as timelines and multilingual spaces as weighting components to give distinctive weights to terms related to events. On timelines term significance is calculated by comparing term distribution of the documents on that day with that on the total document collection reported, and used to represent the document vectors on that day. Since two languages can provide more information than one language, term significance is measured on each language space and used to refer the other language space as a bridge on multilingual spaces. Evaluating the method on Korean and Japanese news articles, our method achieved $14.3{\%}\;and\;16.7{\%}$ improvement for mono- and multi-lingual story pairs, and for multilingual story pairs, respectively. By measuring the space density, the proposed weighting components are verified with a high density of the intra-event stories and a low density of the inter-events stories. This result indicates that the proposed method is helpful for multilingual story link detection.

• Journal of the Society of Disaster Information
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• v.18 no.2
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• pp.252-260
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• 2022

Purpose: As the intensity and frequency of natural hazards are increasing due to climate change, external events that affecting nuclear power plants(NPPs) may increase. NPPs must be protected from external events such as natural hazards and human-induced hazards. External events that may occur in NPPs should be identified, and external events that may affect NPPs should be identified. This study introduces the methodology of identification and screening methods for external events by literature review. Method: The literature survey was conducted on the identification and screening methods of external events for probabilistic safety assessment of NPPs. In addition, the regulations on the identification and screening of external events were investigated. Result: In order to minimize the cost of external event impact analysis of nuclear power plants, research on identifying and screening external events is being conducted. In general, in the identification process, all events that can occur at the NPPs are identified. In the screening process, external events are selected based on qualitative and quantitative criteria in most studies. Conclusions: The process of identifying and screening external events affecting NPPs is becoming important. This paper, summarize on how to identify and screen external events for a probabilistic safety assessment of NPPs. It is judged that research on bounding analysis and conservative analysis methods performed in the quantitative screening process of external events is necessary.

• Journal of KIISE:Software and Applications
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• v.29 no.6
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• pp.377-385
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• 2002

An authentic simulation platform for events situated in spatio-temporal space is presented. The authenticity, i.e., logical fidelity to the reality, of this cyberspace is realized by maximizing the diversity and unpredictability of events occurring therein. The knowledge components and associated schemes required for the simulation of events situated in spatio-temporal space encompass the environmental factors, the objects, the events, and their interrelations. We deviled event activation, triggering mechanism, and cognitive function related to event to realize an authentic simulation of discretionary events. The agents in this simulation environments are autonomous in that they have their own existence and capability of event planning. We focused on identifying basic constructs relevant to authentic simulation of discretionary events whose initiation depends on human intention. Several key ideas are implemented in a typical spatio-temporal situation to demonstrate the viability of our simulation mechanism.

• Journal of the Korea Convergence Society
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• v.9 no.4
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• pp.443-452
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• 2018

The purpose of this study was to identify the factors affecting perceived safety climate and the level of incident reporting attitude, incident reporting knowledge and safety climate. The data were collected by structured questionnaires from 240 nurses and were analyzed with descriptive statistics, t-test, ANOVA, Scheffe test, Pearson's correlation coefficients and multiple regression. The level of incident reporting attitude and incident reporting knowledge was 3.34 and 3.05. The level of safety climate was 3.25. Incident reporting knowledge and safety climate have a significant positive association with incident reporting attitude(r=.33, p<.001; r=.38, p<.001). Incident reporting knowledge was positively associated with safety climate(r=.32, p<.001). Factors influencing safety climate were incident reporting knowledge, belief in improvement and reporting intention which explained 24.7% of the variance(F=12.22, p<.001). The findings indicate that to improve incident reporting knowledge with positive attitude and safety climate should be considered as patient safety strategy and should endeavour to develop interventions for safety.

• Science of Emotion and Sensibility
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• v.11 no.3
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• pp.397-418
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• 2008

This research investigated differences of perception ratio and processes of memory reconstruction. To examine the differences in perception for positive or negative events related to individual subjective well-level, 199 participants were asked to report the perceived ratio of positive versus negative events for the provided event list. Also, recall differences of positive versus negative events were examined in relation to individual differences in happiness. Results partially supported the hypothesis that happy people perceive more positive stimulus in a given situation than less happy people. Happy people also showed more positive percentage in recalled events than actual ratio while unhappy people reported less positive recall percentage than actual ratio. These findings indicate existence of cognitive process that enhances positive or negative memory related to subjective well-being. Significant correlation between perceived ratio and recalled ratio further supports this proposition. Finally, theoretical implications of the present research and suggestions for future research were discussed.

• Science of Emotion and Sensibility
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• v.17 no.3
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• pp.83-94
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• 2014

The present study examined the intensity of affective forecasting and the size of affective forecasting errors of people who experienced social exclusion or those high in need to belong. In Particular, a series of studies was designed to explore the moderating role of the types of future events (i.e. social vs. non-social events) in the relationship between social exclusion, the need to belong and affective forecasting. Results indicated that participants who experienced social exclusion or be high in need to belong showed significantly extreme affective ratings on the future social events compared to the future non-social events. Additional results suggested that more social exclusion experiences or higher needs to belong did not affect to the affective ratings on the experienced social events, indicating greater affective forecasting errors of socially excluded people or people with higher need to belong. The implications and limitations of the results were also discussed.

• The Korean Journal of Archival Studies
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• no.51
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• pp.175-208
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• 2017

This study aims to establish the definition of "event archive," which collects and manages records that focus on a specific event, in order to present a new perspective onto the collection and management of private records. As such, this study defines "event archive" and then identifies its characteristics by comparing it with community archives and locality archives. An event archive consists of person, spatiality, and temporality. As it puts an emphasis on temporality in particular, this study suggests a spiral model, which grafts person and spatiality onto a time axis. Moreover, this study suggests three considerations for the construction of an event archive. First, it presents different construction methods for different types of event archives depending on the time an event occurred. Second, it suggests records collection and management areas considering the three components of an event archive-person, spatiality, and temporality. Third, it supports a digital archive for an event archive to become an open archive.