• Journal of the Society of Disaster Information
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• v.4 no.2
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• pp.124-136
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• 2008

The systematic information management of chemical accidents has been required as a tool for the policy making, system improvement and release of information concerning accident prevention. However, there is not yet a systematic chemical accidents tracking system in Korea, which make confusion among the related government agencies and the parties to accidents that the related statistics are different from each others. In this study, We developed the Chemical Accident Tracking System (CATS) using chemical accident classification which was made up of 12 upper classes, 70 middle classes, 272 lower classes. The CATS is mainly consist list up module, reporting module, searching and statistic module, etc. The CATS is expected to be applied to the information tracking and database system for chemical accidents and improve its manageability.

• Journal of Communications and Networks
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• v.4 no.4
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• pp.282-291
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• 2002

3GPP (Third Generation Partnership Project) is defining UMTS (Universal Mobile Telecommunication System) releases which span the transition from GSM/UMTS coexistence to All-IP UMTS networks. The deployment of an UMTS network depends, in the first place, on the intended service offerings and the release an operator chooses to start service with. Other key decisions in-fluencing UMTS deployment relate to the timing of the functional enhancements and capacity increases along the economic life of the network. This paper gives an overview on the architectural and technical options for UMTS deployment. It also outlines the methodology underlying the business plan aimed at estimating the returns from investments in the UMTS infrastructure, thus helping to tune operators’ strategies for UMTS deployment.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2002.05a
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• pp.585-589
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• 2002

본 연구에서는 소프트웨어의 출시 이후 주기적인 보수(periodic maintenance)를 고려한 출시 시기 결정 방법을 제시하였다. 출시시기 결정방법에 관한 연구는 소프트웨어의 신뢰성 확보, 사용자 편의성 등에 관한 연구와 더불어 중요한 연구 분야로 여겨지는 분야이다. 일반 적으로 소프트웨어는 출시 이후에도 패치(patch), 서비스팩(service pack)등을 통해 지속적인 보수가 이루어지기 때문에, 출시 이후의 보수를 고려하여 출시시기를 결정하는 방법론이 필요하다. 이를 위해, 출시 이후의 보수정책을 반영한 소프트웨어 신뢰성 성장 모형(software reliability growth model)을 도출하였다. 위 모형을 기반으로 하여 비용과 신뢰성에 근거한 소프트웨어 출시 시점을 결정해 보았다. 제시된 모형의 타당성을 검증하기 위해 예제를 통해 기존의 논문에서 제시되었던 결과들과 비교분석을 해 보았다. 본 연구의 결과는 기존 연구에서 고려되지 않았던 보수 정책을 고려함으로써, 보다 현실에 가까운 모형을 제시하였다는 점에서 의의를 찾을 수 있고, 출시 후 보수 시점, 보수 정책 등의 결정에도 기여할 수 있을 것이다.

• Journal of the Korea Safety Management & Science
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• v.10 no.1
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• pp.49-58
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• 2008

The systematic information management of chemical accidents is required as a tool for the policy making, system improvement and release of information. However, there isn't yet a systematic chemical accidents tracking system in Korea, which make a confusion that the related statistics are different from each others. In this research, we analyzed domestic and international chemical accidents data and made the chemical accident codes for the information tracking system properly.

• Electronics and Telecommunications Trends
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• v.21 no.3 s.99
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• pp.100-108
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• 2006

최근 높은 이동성을 제공하는 3G 이동통신시스템과 저렴하고 빠른 무선 인터넷을 제공하는 Wireless LAN간의 연동에 의한 무선 인터넷의 상용화가 눈앞에 다가왔다. 이와 함께 전송 속도 및 대역폭 등의 서로 다른 무선 특성을 가진 이질망간의 연동으로 서비스 절단 및 열화와 같은 서비스 품질(QoS) 보장 문제가 발생한다. 특히, 비동기 방식의 3GPP 이동통신시스템에서 패킷 기반 서비스들이 이미 엄격한 QoS 메커니즘을 제공하는 것과는 대조적으로 IEEE 802.11 기반의 WLAN에서는 IEEE 802.11e를 중심으로한 표준화가 최근 마무리중에 있다. 이러한 상황에서 현재 3GPP 시스템 구조작업반인 SA WG2에서는 Release 7 기반의 문서인 TR 23.836을 중심으로 3GPPWLAN연동을 위한 QoS 및 정책(policy)에 대한 표준화 작업을 진행하고 있다. 본 고에서는 최근 진행되고 있는 TR 23.836 문서를 중심으로 3GPP-WLAN 연동을 위한 QoS 보장에 대한 고려사항 및 표준화 동향을 살펴보고자 한다.

• Journal of Digital Convergence
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• v.13 no.10
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• pp.437-444
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• 2015

In this age of digital technology, we often experience overwhelming and inescapable feelings of weakness, vulnerability, loneliness and fear that propel us into a state of gloom or frustration. Poetry can also serve as a therapeutic medium for overcoming them because it provides unique opportunities for self-discovery and is a catalyst for healing and self-integration. This study examines the healing properties in English poetry. First, Poetry has expressed innermost feelings, which can serve as a catharsis the emotional release. Therefore it can nurture and strengthen the human capacity. Poetic language heals our soul and mind. Rhythm which comes in many forms and poetic form also are important components of the therapeutic value of poetry. So we can say English poetry can be used as a therapeutic means for healing and personal growth.

• The Journal of Fisheries Business Administration
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• v.38 no.3
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• pp.67-88
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• 2007

This study is to estimate the factor weights for a successful sea-ranching project using the Analytical Hierarchy Process. Furthermore, it investigates the policy implications revealed by the differences in group opinions throughout fishermen, government officials, researchers and the scholars when the weights are assessed. The hierarchy is constructed for the 3 levels of factors which must be evaluated for a successful sea-ranching project. The top level of factors is divided by the ecological factors and the socioeconomic factors. As the middle level of factors, there are 3 factors such as the choice of fish, the habitat environment and the production technology under the ecological factors and another 3 factors such as the stability of fishery society, economic factors, and the law & system under the socio-economic factors. And then, at the bottom level of the hierarchy, the economic factors have two different sub-factors such as the fishing revenue and cost. The law & system has also 3 sub-factors such as the accessibility to sea-ranching area, fishing method, and surveillance. The fishermen and government officials show us quite opposite tendencies in assessments of the weights while both the researchers and scholars reveal almost the same opinions positioned at somewhere between first two groups. The study also reports the evaluations of efficiency measures for resource recovery methods among the sea-ranching project, artificial reef, release of fish seeds, and marine protection area. Both the sea-ranching project and marine protection area have the same efficiency in terms of resource recovery while the artificial reef and release of fish seeds are revealed as somewhat less efficient methods comparing to the former two methods.

• Journal of Hydrogen and New Energy
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• v.25 no.2
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• pp.161-172
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• 2014

Hydrogen, which can be produced from abundant and widely distributed renewable energy resources, seems to be a promising candidate for solving the concerns for improving energy security, urban air pollution, and reducing greenhouse gas emissions. The two primary motivating factors for hydrogen economy are fossil fuel supply limitations and concerns about global warming. But the safety issues associated with hydrogen economy need to be investigated and fully understood before being considered as a future energy source. Limited operating experience with hydrogen energy systems in consumer environments is recognised as a significant barrier to the implementation of hydrogen economy. To prevent unnecessary restrictions on emerging codes, standards and local regulations, safety policies based on real hazards should be developed. This article studies briefly the direct impact-distances from hazard events such as hydrogen release and jet fire, and damage levels from hydrogen gas explosion in a confined space. Based on the direct impact-distances indicated in the accident scenarios and consumer environments in Korea, the safety policies, which are related to hydrogen filling station, hydrogen fuel cell car, portable fuel cell, domestic fuel cells, and hydrogen town, are suggested to implement hydrogen economy. To apply the safety policies and overcome the disadvantages of prescriptive risk management, which is setting guidance in great detail to management well known risk but is not covering unidentified risk, hybrid risk management model is also proposed.

• Journal of Digital Convergence
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• v.14 no.6
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• pp.187-197
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• 2016

This research analyzed the relationship and the interaction effect between information understandability and information acquisition level in accordance with government's official message presentation types, in other words, press release in text form, infographic that visualize a large amount of information, and webtoon that helps to understand convoluted information in interesting ways. As a result of research, it was confirmed that there exist both main effect and interaction effect in official message types presented by government and information understandability according to the environmental awareness. In addition, the main effect per each variable was confirmed between official message types presented by government and information understandability according to the environmental awareness; however, the interaction effect per each variable was not confirmed. Such research result is meaningful in that it provides the government with basic data in obtaining the effectiveness and usefulness of the information dependent of the official message types presented by government to the information consumer facing the era of government 3.0.

• Journal of Digital Convergence
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• v.18 no.8
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• pp.179-184
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• 2020

This study aims to investigate the effect that local government's information release range on Covid-19 patients' contact trace on consumer sentiment in the region. One hundred twenty-eight residents of Gangnam-gu and Seocho-gu participated in the study. The results showed that when ambiguity of information increased perceived anxiety on Covid-19 patients' contact trace, which in turn led lower intention to visit the commercial district near the Covid-19 patients' contact trace. Based on the findings, several suggestions was proposed for future research, including longitudinal studies covering even the "long-term" changes in consumer sentiment, the effect of implicit anxiety, and the behavioral difference between residence and non-residence.