• The Korean Journal of Financial Management
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• v.19 no.2
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• pp.135-157
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• 2002

이 논문은 1994년 1월초부터 2001년 6월말까지 미국의 S&P 500지수와 6개 아시아 신흥시장 (한국, 타이완, 홍콩, 싱가폴, 타일랜드, 말레이시아)의 대표적 주가지수의 일간수익률 자료를 이용하여 미국 주식시장으로부터 아시아 신흥시장국가에로의 정보이전 효과를 분석하였다. 이를 위해 조건부변동성을 포함하는 시계열모형을 추정하여 미국 주식시장으로부터의 수익률충격과 변동성충격을 구하였다. 그 결과, 타이완을 제외한 다른 5개국에서 강한 평균이전 효과가 관찰되고 있고, 타일랜드를 제외한 다른 모든 나라에서 (+)의 변동성이전 효과가 관찰되고 있으므로, 대체로 미국 주식시장으로부터 아시아 신흥시장에로의 정보이전 효과가 상당히 강하게 존재한다고 볼 수 있다. 한국의 경우 외환위기 이후 평균이전 효과가 크게 증가하였지만 다른 나라에서는 그렇지 않았다. 또 외환위기 이후 타이완과 홍콩에서는 변동성이전 효과가 감소하였지만, 타일랜드와 말레이시아에서는 (+)값으로 바뀌어 일관성 있는 결과가 관찰되지 않고 있다. 따라서 1997년 아시아지역에서 발생한 외환위기가 정보이전 효과를 촉진하는 계기를 제공하였다고 보기 어렵다.

• ETRI Journal
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• v.20 no.1
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• pp.1-15
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• 1998

The recent technological and industrial revolution dictates a new approach in constructing Korean Information Infrastructure. Lacking past data on the newly emerging markets, econometrics methodologies cannot accurately forecast future path of advanced networks, let alone dynamic impacts of public policies. In this paper, we have built a system dynamics model of the Korean Information Infrastructure and simulated diverse policy measures including market integration and government initiative in investment for experimenting their effectiveness. The most counterintuitive result of our research is that the market integration policy will facilitate CATV networks at an early stage until the year 2010, but will result in a diminished market size in the long run. With the system dynamics approach, we can enhance our understanding of the complex policy systems and get valuable insights through learning by modeling and simulation.

• Proceedings of the KSR Conference
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• 2005.05a
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• pp.77-82
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• 2005

Recently, people's rising interests toward a 'well-being' lifestyle together with research contributions are accelerating the concerns regarding indoor air pollution making indoor air quality management an emerging environmental challenge of the era. The Ministry of Environment began to regulate the air quality of railway stations last year. The newly established 'Indoor Air Quality Act' covers 17 facilities whereas only underground subway stations and underground markets were regulated by previous 'Underground Air Quality Management Act' of 1996. In this study, we carried out the measurement of temperature, relative humidity, CO(carbon monooxide), $CO_2$(carbon dioxide), HCHO(formaldehyde), PM-10(particulate matters), and VOCs(volatile organic compounds) in underground subway stations. Based on the obtained results, we will suggest a way to improve the indoor air quality of the subway stations.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2001.11a
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• pp.39-45
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• 2001

As HDD moves into new emerging consumer markets, expectations on quietness, as well as performance, have increased. The acoustic noise of HDD seems to be closely related to excitation of the spindle motor system. Recently, as a simple approach to reduce disk vibration, thicker disk, which is 50 mil (1.27mm), starts to use in HDD industry. Noise spectrum of HDD with use of 50 mil disk shows the dominant peaks of 900 Hz, mainly caused by excitations of the disk due to air windage effect. In order to reduce noise at this specific frequency, squeeze air damping effect was investigated by extremely reducing the gap between the disk and the base platform.

• Journal of Distribution Science
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• v.18 no.7
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• pp.63-72
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• 2020

Purpose: This study examines the market segmentation and strategy of PT INKA, a rolling stock manufacturer in Indonesia. Research design, data and methodology: The study used the MCDM (Multiple Criteria Decision Making) method specifically the AHP (Analytical Hierarchy Process). The AHP method was applied to identify the target market. This method or approach considers the market attractiveness and competitive strength criteria with quantified parameters. Results: a) Australia, Kenya, Tanzania, New Zealand, and India emerge as the top five target markets; b) There is justification for rolling stock manufacturers to allocate their resources in winning the market share. Conclusion: The main challenge confronting the rolling stock manufacturer is limited resources to acquire a particular market share despite abundant opportunities in this sector. Despite the mastery of technology and long experience in the industry, selecting a target market with multiple criteria could be difficult for an emerging rolling stock manufacturer in South East Asia.

• International Journal of High-Rise Buildings
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• v.9 no.1
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• pp.105-111
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• 2020

In recent years the construction sector has grown significantly in terms of investment and research on robotics and automation, yet it is still a low-tech and disjointed industry. One of the main scopes of this paper is to determine how robotic automation can provide the answers to the needs this industry has. To that end, an overall framework and development agenda of current technological innovation in the field has been outlined. Possible drawbacks and driving forces in the development of robots in the construction site have been identified. In addition, the review provides for state-of-the-art policies and regulations, as well as the short and medium-term outlook in different markets and countries. Ultimately, the forecast impact on traditional processes, construction sites, emerging technologies and related professions has been summarized in order to delineate prospective repercussions and future directions towards self-sufficiency.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2001.05a
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• pp.531-544
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• 2001

The use and development of nuclear energy has a long history more than 5o years and is facing a rapid changing environment in technological innovations in order to meet the requirements of energy supply, environmental conservation and social and political demands. The innovation of nuclear technologies are also necessary continuously in order to contribute for the progress of national economy and industry development, improvement of public health, progress of nation science and technology and furthermore is very important for the survival of nuclear industry and strengthening of competition of nuclear technologies. Major directions of the innovation of nuclear technologies would be the enhance ment of safety and economy of the use of nuclear energy, securing od nuclear proliferation-resistance, safe management of radioactive wastes, technology development for newly emerging markets and improvement of public health.

• International Journal of High-Rise Buildings
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• v.6 no.4
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• pp.301-306
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• 2017

The design and construction of supertall buildings has grown dramatically in recent years. This area of practice has traditionally fallen within the purview of a very small group of architects and engineers, but this is rapidly changing, as unprecedented growth and densification has spread to markets not traditionally known for high rise construction. The design community has been increasingly committed to the adoption of green and sustainable design, and the integration of smarter, cleaner technologies across the building spectrum. This paper examines current supertall design trends, and suggests that recently completed and planned projects are trending towards more sustainable solutions, and that a unique set of best practices are emerging specific to Supertalls.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.892-893
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• 2007

Industrial interest in switched reluctance motor (SRM) drives has varied since 1850s. This has been primarily due to the emerging markets for variable speed drives in consumer and industrial products, such as home appliances, air conditioning, hand tools, fans, pump motor, etc. However, SRM has been plagued with the acoustic noise and vibration problem by input power of fixed section. Therefore, This paper offers operating characteristics by dynamic simulation through the generalization of inductance profile and estimation of inductance according to current. the control methode are applied from DSP(digital signal processor) with voltage reference and position detection.

• International conference on construction engineering and project management
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• 2005.10a
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• pp.869-874
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• 2005

Given the intense competition and slowdown in domestic demands, there is greater pressure on Singapore contractors to seek overseas markets for revenue and growth. This impetus, coupled with emerging economic reforms in the regional developing countries, has invariably created numerous opportunities for Singapore contractors. However, mixed results were reported on their overseas performance so far. Consequently, this paper aims to formulate a framework that would assist Singapore contractors to successfully export their services into developing countries. The proposed framework comprises ten critical success factors (CSFs), which are identified from in-depth interviews with eight Singapore contractors. These ten success factors are subsequently classified under three different stages, namely initial, entry and operational stages. Preliminary results show that Singapore contractors are most focused on the entry stage, with the highest number of CSFs.