• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.16 no.2
• /
• pp.90-97
• /
• 2002

In this paper we study the performance test items and improvement plans of surge protective devices for low-voltage power circuits used in railway system. Above of all, the sources of electromagnetic interference in railway system are researched. And then we compared domestic railway standard with IEC and IEEE standards far the test items and methodologies of surge protective devices. Through the investigations, we found that the domestic standard is behind in the number of test items and methods on surge protective devices. As the countermeasures, we suggest removing component tests of surge protective devices, separating standards for power and signal standards, and using international surge waveform. In applying to domestic railway surge protective devices, surge limiting voltage measuring and surge endurance tests by international standard methods are good result.

• The Safety technology
• /
• no.44
• /
• pp.10-13
• /
• 2001

그동안 관심을 모았던 국제적인 안전보건경영시스템(OSH-MS : Occupational Safety and Health management System)이 국제노동기구(ILO)에 의해 개발되어 발표 되었다. 지난 6우러 "국제노동기구의 안전보건경영시스템 지침(ILO Guidelines on Occupational Safety and Health Management Systems)"이란 제목으로 국제노동기구에서 공개했는데, 이것은 작년부터 국제 노동기구가 2001. 6울에 확정 지침을 발표하겠다고 밝힌 이후 나온 것으로써 지난 2우러 공개한 '안전보건경영체제에 대한 기술지침 초안' (Draft ILO Guidelines on Occupational Safety and Health Management Systems)을 4.19~27일 전문가 회의를 개최를 통해 수정 발표한 것이다. 따라서 이번 호에서는 지난 2월 공개된 초안과 6월에 확정된 지침을 비교하면서 확정지침의 내용을 소개 한다.

• The Journal of the Korea Contents Association
• /
• v.19 no.3
• /
• pp.288-301
• /
• 2019

This study presents an analysis of a total of 101 papers on the theme of international research cooperation by nation, gathered from Web of Science. The findings of this study show that 20 nations published papers on the theme of international research cooperation with the ranking of U.K.(27 papers, 26.7%), the Netherlands(20 papers, 19.8%), U.S.(19 papers, 18.8%), Brazil and Spain(5 papers, 5.0%), Russia(4 papers, 4.0%), etc. South Korea was found to be in the lower ranking group(2 papers, 2.0%), suggesting that it still has a lower level of international research cooperation. Thus, particularly, researchers at universities by institution and humanities by discipline should activate the publication of papers on international research cooperation by expanding relevant projects so that the international research capabilities of South Korea should be bolstered.

• Environmental and Resource Economics Review
• /
• v.21 no.1
• /
• pp.69-92
• /
• 2012

This paper analyzed price asymmetry of domestic petroleum products by distribution stage. Analyzing the asymmetry by distribution stage, we can investigate the gap between analysis results and consumers' perception. For the first stage, we analyzed asymmetries between retail prices including tax and the spot prices of crude oil. The results show that retail price increases more quickly in response to the crude oil prices rise than to the crude oil prices fall as consumers' perception. For the second stage, we analyzed asymmetry of international petroleum product prices in Korean Won with the change in the crude oil spot prices. The results show that international petroleum product prices increase higher in response to the crude oil prices increase than to the crude oil prices decrease. For the final stage, we examined the asymmetry of wholesale price and retail price with the change in the international petroleum product prices in Korean Won. The results show that wholesale prices increase more quickly in response to the crude oil prices rise than to the international petroleum product prices fall. The retail prices, however, decrease more quickly in response to the crude oil prices fall than to the international petroleum product prices rise.

• Journal of Korea Port Economic Association
• /
• v.28 no.1
• /
• pp.289-312
• /
• 2012

Shipping is a global industry, with 80% of the world's international trade of goods transported by sea. Many countries with large international trade volumes place great importance in developing their shipping industry. Recently changes in the world economy, international trade, world oil prices and other uncertainties have led to increased competition in the world shipping market. This is specially true, along the Pacific coast, where five of the world's major maritime countries, Japan, China, South Korea, Singapore and the United States are located. This paper aims to compare the international competitiveness of Japan, China, South Korea, Singapore and the United States with Port's Diamond Model and AHP analysis. The results of this research give some suggestions for international competitiveness of Chinese shipping industry, is very competitive in quantitative terms but is relatively weak in qualitative terms.

• The Korean Journal of Air & Space Law and Policy
• /
• v.24 no.2
• /
• pp.187-210
• /
• 2009

Space law(or outer space law) and the law of the sea are branches of international law dealing with activities in geographical ares which do not or do only in part come under national sovereignty. Legal rules pertaining to the outer space and sea began to develop once activities emerged in those areas: amongst others, activities dealing with transportation, research, exploration, defense and exploitation. Naturally the law of the sea developed first, followed, early in the twentieth century, by air law, and later in the century by space law. Obviously the law of the sea, of the air and of outer space influence each other. Ideas have been borrowed from one field and applied to another. This article examines some analogies and differences between the outer space law and the law of the sea, especially from the perspective of the legal status, the exploration and exploitation of the natural resources and environment. As far as the comparisons of the legal status between the outer space and high seas are concerned the two areas are res extra commercium. The latter is res extra commercium based on both the customary international law and treaty, however, the former is different respectively according to the customary law and treaty. Under international customary law, whilst outer space constitutes res extra commercium, celestial bodies are res nullius. However as among contracting States of the 1967 Outer Space Treaty, both outer space and celestial bodies are declared res extra commercium. As for the comparisons of the exploration and exploitation of natural resources between the Moon including other celestial bodies in 1979 Moon Agreement and the deep sea bed in the 1982 United Nations Convention on the Law of the Sea, the both areas are the common heritage of mankind. The latter gives us very systematic models such as International Sea-bed Authority, however, the international regime for the former will be established as the exploitation of the natural resources of the celestial bodies other than the Earth is about to become feasible. Thus Moon Agreement could not impose a moratorium, but would merely permit orderly attempts to establish that such exploitation was in fact feasible and practicable, by allowing experimental beginnings and thereafter pilot operations. As Professor Carl Christol said until the parties of the Moon Agreement were able to put into operation the legal regime for the equitable sharing of benefits, they would remain free to disregard the Common Heritage of Mankind principle. Parties to one or both of the agreements would retain jurisdiction over national space activities. In so far as the comparisons of the protection of the environment between the outer space and sea is concerned the legal instruments for the latter are more systematically developed than the former. In the case of the former there are growing tendencies of concerning the environmental threats arising from space activities these days. There is no separate legal instrument to deal with those problems.

• 주택과사람들
• /
• no.8 s.25
• /
• pp.75-85
• /
• 1992

• Journal of The Korean Association For Science Education
• /
• v.24 no.6
• /
• pp.1235-1244
• /
• 2004

The purpose of the study was to produce resources to help develop instructional methods and programs for school science to reduce gender differences in science achievement by analyzing TIMSS-R results according to item type, benchmark, and content category. Korean male students performed higher than Korean female students and gender differences of Korean students were higher than international means in all item types including multiple-choice, short answer, and extended response type. GDI(Gender Difference Index) of Korean students was lower than international mean in top 10% benchmark but higher than international means in other benchmarks. Korean male students also exhibited higher performance than Korean female students in all content categories except scientific inquiry and the nature of science category. Regarding items that GDIs were higher than 10, the number of items belonged to life science and earth science category was relatively larger and a high percentage of them was not included in school science curriculum. In addition, the items were equally distributed in each performance category. In sum, the study showed various gender differences according to item type, benchmark, and content category. The results could be used to find appropriate instructional methods to reduce gender differences in science achievement.

• Journal of Technology Innovation
• /
• v.23 no.3
• /
• pp.201-223
• /
• 2015

Existing research on international standardization has largely taken a qualitative approach focusing on comparative studies of national institutions and policies on standards or international rivalries from the perspectives of international relations or innovation studies. While there exists a handful of quantitative studies, they are mostly confined to simple numeric counts of essential patents, new work item proposals, or secretaries staffing international standards development organizations (SDOs). This study aims to contribute to our understanding of the dynamics of international standardization by the analysis of the data coding systematically national activities in the standardization process of the International Organization for Standardization (ISO), by far the largest international SDO. Our analysis of the four critical types of standardization documents generated in the Working Group 7 of the ISO/IEC Joint Technical Committee 1 reveals interesting dynamics among key players of global ICT standards regime. First, while the US takes a dominant share of the personnel as well as new work item proposals for standardization, its quality of activities rather falls behind as it mostly focuses on keeping in check other countries' standardization activities. Second, European countries tend to spread their effort evenly across different types of standardization activities. Finally, despite such differences between the US and European countries, both rely heavily on multinational companies to gain an advantage in the voting stage of standardization process.

• The Journal of the Acoustical Society of Korea
• /
• v.22 no.6
• /
• pp.463-471
• /
• 2003

The results of the APMP (Asia Pacific Metrology Programme) regional intercomparison of acoustic calibrators were reviewed and analyzed. The artefacts used in intercomparison are a sound level calibrator and a pistonphone. The microphones used to measure the output pressure level are 1" and 1/2" standard microphones (LS1P, LS2P) as well as 1" and 1/2" reference microphones (WS1P/F, WS2P/F). The results obtained using standard microphones are satisfactory, but those obtained by the reference microphones, even though E/sub n/ values are within ±1.0, showed great deviations. Such results had come from the inaccurate calibration of reference microphones. By using the correct calibration results which were obtained by the recently established international standards, the new results were very similar to those of the foreign standard institutes.