• Journal of Environmental Health Sciences
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• v.46 no.4
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• pp.457-469
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• 2020

Objective: This study was designed to estimate the precise nationwide number of those who used humidifier disinfectants (HDs) and experienced specific health effects, including death, due to exposure to HDs in Korea between 1994 and 2011. Methods: A total of 5,000 households (15,472 people) were surveyed by stratifying the sample with a design that is equivalent to nationally approved household systematic sampling and face-to-face interviews from October 16, 2019 to December 30, 2019. Results: The proportion of use of humidifier disinfectants at home was 18.4% (2,844/15,472 people) and the proportion of those who experienced health effects among those who were exposed to HDs was 10.7% (303/2,844 people). Based on these factors, it was estimated that 8.94 million people (95% CI=8.25-9.63 million) were exposed to HDs and 0.95 million people (95% CI=0.87-1.02 million) experienced health effects, which means almost one in five and one in fifty Koreans respectively. The estimated number of deaths from HDs were 20,366 people (95% CI=18,801-21,931). Conclusion: The survey was large and analyzed a representative sample across the country, so this estimation of the nationwide population exposed and at risk to HDs is more accurate and reliable than previous studies. However, it is necessary to confirm whether results similar to those of this study can be reproduced through a survey using a cross-sectional survey at the national level. In particular, a survey focused on death cases is needed.

• Economic and Environmental Geology
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• v.22 no.4
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• pp.371-379
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• 1989

Peak or near-peak metamorphic temperatures and pressures for Seosan area could be estimated from major element method. Temperatures calculated from garnet-biotite geothermoneter(Ferry and Spear, 1978; Ganguly and Saxena, 1984) are $620{\pm}40^{\circ}C$ and $520{\pm}20^{\circ}C$ for Seosan and Daesan Formation respectively. Presures derived from garnet-plagiciase-$Al_2Si_O_2$-quartz geobarometer(Newton and Haselton, 1981; Ganguly and Saxena, 1984)suggest 5-6kb for both of Seosan and Daesan Formation. These results suggest that under isobaric, Seosan Formation underwent relatively high temperature metamorphism compared with Daesan Formation. Chemical zonations of garnet for major elements such as Fe, Mg, and Mn in Seosan and Dasan Formation show different patterns each other probably caused by different thermal history.

• Journal of Advanced Marine Engineering and Technology
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• v.35 no.4
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• pp.491-499
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• 2011

Starting with maritime DGPS base stations of Palmido, Ochongdo which have been operated since 1999, truly our nation has become the most powerful country possessed with total of 17 DGNSS base stations in the field of DGNSS operation infrastructure. This paper examines into the country's DGNSS services as measuring the service range of the maritime DGPS base stations in the domestic ferry lines which sections are from Jeju to Incheon, from Busan to Jeju, from Jeju to Nokdong, the propagation characteristics of the radio waves of 300 kHz bands on sea and land path. As a result of identifying the service range of the DGPS in the sea routes of the southern sea and the western sea, the measured results of the DGPS signals are confirmed more than 100 NM(recommended service range). It can be possible to practical use the position information, which is safe navigation and various marine traffic management systems. It will be useful an expansion of maritime DGPS reference station in the near future.

• The Journal of the Korea Contents Association
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• v.16 no.10
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• pp.766-779
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• 2016

This study was designed to look at a gap between what is reported and what is real, based on 'virtuality' shown in the media coverage of the Sewol ferry disaster. The way the Korean media reported the disaster raised serious concern in describing realities as the coverage was dotted with omitted, diluted, misleading, false and biased information, dubbed as the sinking of journalism by the Special Committee of the Korea Broadcasting Journalist Association. Virtuality can be problematic in journalism since users, when frequently exposed to 'mediated reality' or mediated presentment, often consider it actual and respond to it, rather than reacting to 'actual reality'. Many studies have found that media users tend to perceive mediated reality as an actual outside world. This paper aimed to explain signification of media reporting and limitations of user perception by reviewing major discussions and arguments on virtuality in previous research and history of thoughts. It was easy to link virtuality of mediated reality to the role of the media, which impact public opinion and change the flow of an event, and to other concepts such as the socialization of power, social control and social hegemony.

• Journal of the Economic Geographical Society of Korea
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• v.7 no.2
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• pp.283-296
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• 2004

This study aims at explaining locality of living space which is changing drastically by exploring change of land utilization, living space and condition in Yeo-ju, an agricultural area around Seoul. The conclusions are as follows. 1. Agricultural land utilization tends to decrease, while civic land utilization tends to increase. 2. Change of living space due to transportation development is remarkable. Big ferry town (Yeoju-town) grew to a city, while small ferry town fell away. 3. In villages on slow urbanization, houses or lands are deserted. 4. In villages, there has been increasing number of recreational farm for urbanite. 5. In 80% of villages, there has been an increasing number of part-time farmers. 6. Most serious social problem in Yeo-ju is incompetence in agricultural activity after UR. In sum, Yeoju is now an area where the pace of urbanization is very tardy. However, this area, as an changeable area just before speedy urbanization, is expected to be urbanized drastically on condition that transportation develop. When plans suitable for this town are set up, Yeoju is expected to be a comfortable city.

• Journal of Navigation and Port Research
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• v.44 no.2
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• pp.88-97
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• 2020

In the past 20 years, passenger and cargo transportation performance at the international passenger ports in Korea have increased by 8.6% on the compound annual growth rate, respectively. The Korean government had expected to continue expanding the market of car ferries and the government included plans for the development of additional routes and lanes with neighboring countries such as China, J apan, and Russia as a part of the Plan of the Korean Ministry of Oceans and Fisheries in 2019. However, compared to the development of routes, the management and operation of passenger terminals are inefficient. The purpose of this paper was to introduce the overall improvement of the passenger terminal operating system that reflects the recent changes in the supply and demand of international passenger vessels and the needs of the government and private sector passengers. To this end, a basic survey was conducted on the status of operations and facilities at the Busan International P assenger Terminal and a questionnaire survey was administered on the subject of use. The results of the survey were analyzed using the IPA model. As a result of the analysis, three items in the operation sector, three items in the facility sector, and four items in the system sector of the Busan International Passenger Terminal were identified as in need of improvement. Based on the results, the need for investment to improve the international passenger terminal operating system is suggested.

• Journal of Korea Port Economic Association
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• v.17 no.2
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• pp.139-166
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• 2001

Globalization and regionalization are major trends in the international economic system. The severe competition among countries has signalled the need for a new international trade system as prescribed by the WTO, which regulates international trade practices. Additionally, expanding the activities and role of the Pan-Yellow Sea area in the world has a very important function in terms of regional cooperation and logistics environment. In this paper, the trading conditions and shipping transport problems of the Pan-Yellow Sea area (North-East Asia) were investigated. Shipping transport conditions in the Pan-Yellow Sea area, particularly Korea-China routes, were surveyed as well. A new Incheon-China container liner route was suggested as a partial remedy to some of the shipping transport problems of the Pan-Yellow Sea Area (North-East Asia). The Incheon-China Container Liner route is more efficient than Pusan and Pyungtaek Ports or the car ferry route to China in terms of transport time and expense. The transport burden indicator which includes the time and expense of transport, can be a useful tool in comparing these routes. Accordign to the transport burden indicator, the Incheon-China Container Liner route is more efficient than the Pusan, Pyungtaek, or car ferry routes. To establish a successful liner route between the ports of Inchon and China, there is a need to prepare three measures that contain short-term medium-term and long-term strategies. Furthermore, these measures should be prepared and adopted in phases, in accordance with considerations of future conditions for shipping and logistics in the Pan-Yellow Sea area.

• Journal of the Society of Disaster Information
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• v.11 no.1
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• pp.63-72
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• 2015

This study aims to examine the state of accidents and related issues related to Theme Groups experiential learning experiences of students and suggest ways to improve security measures to prevent future incidents. Case studies of the sunken Sewol ferry and the collapse of the gymnasium at Mauna resort in Gyeongju are conducted by analyzing the existing literature and the data collected from the media sources and related agencies. With a basis on the findings of the analyses, it is suggested that legal foundation and disaster and risk management systems (systematic revision of the laws, raised safety awareness among citizens, production and education of security managers, formation of disaster management organizations, establishment of headquarters in case of emergency and installation of first aid facilities, improved national response system, enforcement of disaster drills, introduction of assessment system, etc.) must be established to contribute to creating a safer society.

• Journal of the Society of Disaster Information
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• v.10 no.3
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• pp.396-407
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• 2014

In 19th May 2014, the government announced that KCG(Korea Coast Guard) is dissolved regarding responsibility for recently accident which is Sewol ferry disaster. But KCG, a central administrative agency is responsible for protecting maritime sovereignty of South Korea; the most basic and indispensable organization. Furthermore, The purpose of KCG is to provide the safety of the public and keeping of public order by prescribing matters necessary for the securement of maritime security, maintenance of public order and protection of marine resources & facilities. Therefore, In this article, I would like to suggest tentatively named FRAMEWORK ACT ON KOREA COAST GUARD's management plan which could reflect the scope of functions. It means we examine the current state of KCG, and would like to signpost for the most ideal way of legal system in Korea Coast Guard. Finally, this treatise is expected that this research can be a guideline contribute to improving Korea Coast Guard relevant laws even a little.

• Journal of the Society of Naval Architects of Korea
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• v.34 no.3
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• pp.38-52
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• 1997

Aluminum-faced honeycomb-cored sandwich panels as hull plating can provide structural weight savings when compared with the conventional aluminum single panels. The aim of the present paper is to confirm the feasibility of the sandwich panels for the hull material of fast ferries through designing an 80m class proto-type fast passenger/car ferry. For the case study, the structural design for the same principal particulars using the aluminum single panels is also performed, and the design results for the two types will be compared to confirm the weight savings between the two construction methods. The economics of a ship, being comprised of the shipbuilding cost and ship operaing cost, will require a cost analysis including a quantitative comparison between the two construction methods and the results of the cost analysis will be presented. Finally, the reasons why aluminum sandwich panels have not presently been used as the hull material for large size fast vessels will be discussed.