• Nuclear Engineering and Technology
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• v.53 no.2
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• pp.484-497
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• 2021

This paper proposes an extended time uncertainty analysis approach in Level 2 human reliability analysis (HRA) considering severe accident management (SAM) strategies. The method is a time-based model that classifies two time distribution functions-time required and time available-to calculate human failure probabilities from delayed action when implementing SAM strategies. The time required function can be obtained by the combination of four time factors: 1) time for diagnosis and decision by the technical support center (TSC) for a given strategy, 2) time for strategy implementation mainly by the local emergency response organization (ERO), 3) time to verify the effectiveness of the strategy and 4) time for portable equipment transport and installation. This function can vary depending on the given scenario and includes a summation of lognormal distributions and a choice regarding shifting the distribution. The time available function can be obtained via thermal-hydraulic code simulation (MAAP 5.03). The proposed approach was applied to assess SAM strategies that use portable equipment and safety depressurization system valves in a total loss of component cooling water event that could cause reactor vessel failure. The results from the proposed method are more realistic (i.e., not conservative) than other existing methods in evaluating SAM strategies involving the use of portable equipment.

• Asian Journal of Business Environment
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• v.14 no.3
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• pp.1-11
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• 2024

Purpose: This study analyzes the impact of weather conditions, holidays, and sporting events on beer sales, providing insights for market strategy and inventory management in the beer industry. Research design, data and methodology: Beer types were classified into Lagers and Ales, with further subcategories. The study utilized weekly retail sales data from January 2018 to August 2020, provided by Nielsen Korea. An ARMAX model was employed for time-series analysis. Results: The analysis revealed that increasing temperatures positively influence sales of Pilsners and Pale Lagers. Conversely, higher precipitation levels negatively affect overall Lager sales. Among Ales, only Stout sales showed a significant decrease with increased rainfall. Sunshine duration did not significantly impact sales for any beer type. Humidity generally had little effect on beer sales, with the exception of Amber Lagers, which showed sensitivity to humidity changes. Holidays and sporting events were found to significantly boost sales across most beer types, although the specific impacts varied by beer category. Conclusions: This study offers a detailed analysis of how weather conditions and specific events influence different beer type sales. The findings provide valuable insights for breweries, beer processors, and retailers to optimize their market strategies and inventory management based on weather forecasts and seasonal events. By understanding the consumption patterns of each beer type in relation to environmental factors, businesses can better anticipate demand fluctuations and tailor their operations accordingly.

• Journal of Internet Computing and Services
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• v.25 no.3
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• pp.55-70
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• 2024

This study aims to compare the differences in the carbon neutral agendas of the two countries based on the differing interest positions of the media in the two countries, as well as to analyze the carbon neutral media coverage in South Korea and China. It also seeks to identify the major topics emphasized in the carbon neutral news agenda setting process in the two countries. A total of 49,227 news articles from South Korea and 105,680 news articles from China, covering the period from the declaration of carbon neutrality in both countries in 2020 to May 9, 2022, were collected. CONCOR and topic modeling analyses were performed on these texts. The results found that South Korean media showed a preference for covering carbon neutrality from the perspective of its inhabitants, whereas Chinese media demonstrated a preference for covering carbon neutrality from the viewpoint of the nation. The discourses on coverages largely focus on areas such as energy strategy, business strategy, industrial growth, and international cooperation, with an obvious lack of discourse on the environment. The findings of this study expect to serve as a primary reference in establishing a news coverage strategy which is environmentally sustainable for the media.

• Proceedings of the Korea Contents Association Conference
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• 2011.05a
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• pp.487-488
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• 2011

본 논문에서는 스마트 시대에 ETRI 전망 비전 2020에서 제시한 4S전략(Smart, Safe, Strong, Sustainable)을 바탕으로 Beyond Smart 시대의 Safe 전략을 제안해 보고자 한다. Smart한 국가기반과 Strong한 경쟁력을 갖추는 것, 그리고 Safe한 국가 질서를 유지하는 일과 Sustainable한 국가 환경을 유지하는 일이 상호 독립적으로 달성될 수 있다는 전제이다. 그런데 문제는 이러한 목표들을 어떻게 달성할 것인가 하는 전략(strategy)의 문제이다. 10대 IT 아젠다에서의 Safe 전략은 물리적 안전과 심리적 안전을 보장하는 안심/안전, 고령화 사회를 대비한 건강 장수국가와 요람에서 무덤까지 안전한 교통 선진국가 등 3개 아젠다로 도출하였다. 10대 IT 아젠다에서의 Safe 영역을 튼실하게 구축하는 경우, 미래의 우리나라는 건강하고 안전한 선진국 대열을 선도하는 국가로 태어날 수 있을 것이다.

• Clinical and Experimental Pediatrics
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• v.63 no.5
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• pp.164-170
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• 2020

The prognosis of patients who are comatose after resuscitation remains uncertain. The accurate prediction of neurological outcome is important for management decisions and counseling. A neurological examination is an important factor for prognostication, but widely used sedatives alter the neurological examination and delay the response recovery. Additional studies including electroencephalography, somatosensory-evoked potentials, brain imaging, and blood biomarkers are useful for evaluating the extent of brain injury. This review aimed to assess the usefulness of and provide practical prognostic strategy for pediatric postresuscitation patients. The principles of prognostication are that the assessment should be delayed until at least 72 hours after cardiac arrest and the assessment should be multimodal. Furthermore, multiple factors including unmeasured confounders in individual patients should be considered when applying the prognostication strategy.

• 중국학논총
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• no.66
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• pp.227-264
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• 2020

In Sanyue, the identity of the state and the individual is discussed in terms of the class, ideology, system, moral ethics, tactical strategy, national view, Talent image, etc. and It pursues a historical approach in the world history and an attempt to self-realize in the history of mankind. This literature expresses the strength of military theory and discusses the main core points of the country as a military political and tactical strategy as follows: "Shangyue, zhongyue, and Xiayue. In the Shangyue in Sanyue, it describes how to distinguish the heroes who have been appointed through the ceremony, and it shows the accomplishment of the reason. In zhongyue, we discuss how to distinguish the contingency plan the meaning of change. In Xiayue, we discuss practical thinking of moral ethics and explain the possibility of All the officials and sages angry by considering the safety of the country."

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.685-688
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• 2020

본 논문에서는 게임 개발의 한 형태이자 새로 도입된 개발 형태 중에 가장 떠오르고 있는 얼리액세스 개발 형태에 대해 서술하며, 얼리액세스 개발 방식의 공통적인 성격과 성공했던 게임들의 사례를 통해 앞으로 게임 개발자들에게 지양해야 할 부분과 반영해야 할 부분을 통해 소비자들에게 어떤 방식으로 접근해야 효과적으로 다가갈 수 있으며, 어떤 방향의 개발을 거쳤던 게임이 흥행하지 못했는지를 연구, 분석을 통해 얼리액세스 만의 방식을 통해 개발자, 소비자 모두를 충족시킬 수 있는 전략을 제시하고자 한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.01a
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• pp.51-54
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• 2020

스마트폰의 보급으로 빠르게 성장한 인터넷 시장은 다양한 정보를 쉽고 빠르게 접할 수 있게 되었고 많은 사람들이 찾아보는 실시간 스트리밍 또한 빠른 속도로 성장하였다. 실시간 스트리밍이 알려지고 성장하기까지는 긴 시간이 걸리지 않았으며 현재까지도 급격하게 성장하고 있는 추세이다. 본 논문에서는 글로벌 대표 기업들이 클라우드 기반의 게임 플랫폼 시스템을 제시하고 있는 반면 국내 기업들의 상황은 그렇지 못하고 있는 부분에 대해서 게임 플레어들의 스트리밍 기반의 게임 구입 선호도 설문을 통해 국내 게임 마케팅에 스트리밍 기반의 게임 판매 전략에 중요성을 제시하고자 한다.

• The Bulletin of The Korean Astronomical Society
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• v.45 no.1
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• pp.36.3-37
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• 2020

Recent observation of the neutron star merger event, GW170817, through both gravitational wave (GW) and electromagnetic wave (EM) observations opened a new way of exploring the universe, namely, multi-messenger astronomy (MMA). One of the keys to the success of MMA is a rapid identification of EM counterpart. We will introduce GW follow-up observation project in Korea for hunting GW EM counterpart rapidly and its strategy for prioritization of GW source host galaxy candidates. Our method relies on recent simulation results regarding plausible properties of GW source host galaxies and the low latency localization map from LIGO/Virgo. We will show a test result for both binary neutron star merger events using previous event and describe observing strategy with our facilities for GW events during the ongoing LIGO/Virgo O3 run. Finally, we report the results of optical/NIR follow-up observation of GW190425, the first neutron.

• Advances in aircraft and spacecraft science
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• v.7 no.5
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• pp.387-404
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• 2020

The numerical simulation of shock waves in supersonic flows is challenging because of several instabilities which can affect the solution. Among them, the carbuncle phenomenon can introduce nonphysical perturbations in captured shock waves. In the present work, a hybrid numerical flux is proposed for the evaluation of the convective fluxes that avoids carbuncle and keeps high-accuracy on shocks and boundary layers. In particular, the proposed flux is a combination between an upwind approximate Riemann problem solver and the Local Lax-Friedrichs scheme. A simple strategy to mix the two fluxes is proposed and tested in the framework of a discontinuous Galerkin discretisation. The approach is investigated on the subsonic flow in a channel, on the supersonic flow around a cylinder, on the supersonic flow on a flat plate and on the flow in a overexpanded rocket nozzle.