• Proceedings of the KIEE Conference
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• 2007.11b
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• pp.124-126
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• 2007

전력계통 보안관제센터는 전력IT의 사이버테러 위험을 줄이고 보안을 강화하는 것이다. 이를 위해 전력산업 관계기관은 해킹 바이러스와 같은 사이버공격에 대한 대응을 고도화하기 위해 전력거래소 내 전력계통보안관제센터(ES-ISAC)에 실시간 관제 대응센터를 만들고 시스템 성능의 지속적인 업그레이드 작업과 다른 시스템과의 연동을 확대함으로써 사이버침해 사고에 대한 예측력을 향상시키는 작업을 추진해야 한다. 침입기술, 웜 바이러스 샘플 분석과 같이 침해사고 정보수집을 보다 능동적으로 하고 모든 정보에 대한 백업시스템을 구축함으로써 안정적인 센터운영을 기해야 한다.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.18 no.3
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• pp.204-215
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• 2008

Many researches for service-life of chemical cartridges of respirators have been performed in many countries. On the result of these researches a few softwares programs were eventually developed to be used. In spite of that, it is difficult to apply these researches and softwares practically in the work spot because of too many factors that influence on service-life of chemical cartridges. This study was the first of two conducted for the purpose of developing program for estimating exchange period or service-life of chemical cartridges available feasibly in the workplaces. Collecting plan of cartridges discarded after use is in principle that three cartridges from three workers at a time, three steps of 1/2 exchange time due to smelling, just routine exchange time and 1.2 to 1.3 expanded time of routine exchange, total nine cartridges are collected in the same job site. 33 cartridges for organic vapor were collected in paint spray process of ship yard and paint factory, and 6 cartridges for acid were collected in plating process. These cartridges were analysed the remaining breakthrough time in 3M Innovation Center. Challenge vapor and breakthrough concentration were complied with Korean regulation for chemical cartridge respirators. Estimated breakthrough time was determined from previously used time plus breakthrough time for the remaining. Exchange period of cartridge would be the shortest time among three estimated breakthrough times. On the result breakthrough time for organic vapor was found to be relatively easily estimated, but that for acid aerosol or vapor was difficult to be confident. Even though this method was difficult to be precisely predicted exchange period of cartridge, it could be an alternative program practically available in the job site.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.40 no.1
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• pp.36-44
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• 2003

This paper proposes a Viterbi decoding scheme without trace-back operations to reduce the amount of memory storing the survivor path information, and to increase the decoding speed. The proposed decoding scheme is a modified register exchange scheme, and is verified by a simulation to give the same results as those of the conventional decoders. It is compared with the conventional decoding schemes such as the trace-back and the register exchange scheme. The memory size of the proposed scheme is reduced to 1/(5 x constraint length) of that of the register exchange scheme, and the throughput is doubled compared with that of the trace-back scheme. A decoder with a code rate of 2/3, a constraint length, K＝3 and a trace-back depth of 15 is designed using VHDL and implemented in an FPGA. It is also shown that the modified register exchange scheme can be applied to a block decoding scheme.

• Journal of the Korean Applied Science and Technology
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• v.40 no.4
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• pp.906-912
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• 2023

This study attempted to reveal the influence of the exchange relationship (TMX) between Pilates leaders and members on job performance. Accordingly, from April 1 to July 12, 2023, 82 lines of couple data (164 people: 82 leaders, 82 members) were sampled and the following results were derived. First, the higher the leader exchange relationship, the higher the leader's job performance, and the higher the member exchange relationship, the higher the leader's job performance. Second, it can be seen that the higher the leader exchange relationship, the higher the member's job performance, and the higher the member exchange relationship, the higher the member's job performance. Therefore, it can be seen as a result of reflecting the systematic demand for exchange activities because the dependent relationship leads to active job participation through mutual relationships with colleagues.

• East Asian Economic Review
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• v.22 no.3
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• pp.371-400
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• 2018

Although asset price is an important factor in determining changes in external balances, no studies have investigated it from the Chinese perspective. In this study, I empirically examine the underlying driving forces of China's trade balances, particularly the role of asset price and the real exchange rate. To this end, I estimate a sign-restricted structural vector autoregressive model with quarterly time series data for China, using the Bayesian method. The results show that changes in asset price affect China's trade balances through private consumption and investment. Also, an appreciation of the real exchange rate tends to deteriorate trade balances in China. Furthermore, forecast error variance decomposition results indicate that changes in asset price (stock price and housing price) explain about 20% variability of trade balances, while changes in the real exchange rate can explain about 10%.

• Bulletin of the Korean Mathematical Society
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• v.39 no.2
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• pp.317-326
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• 2002

In this paper, we establish necessary and sufficient conditions for an exchange ring R to satisfy the n-stable range condition. It is shown that an exchange ring R satisfies the n-stable range condition if and only if for any regular a $\in$ R$^n$, there exists a unimodular u $\in$$^n$ R such that au $\in$ R is a group member, and if and only if whenever a$\simeq$$_n$b with a $\in$ R, b $\in$ M$_n$(R), there exist u $\in$ R$^n$, v $\in$$^n$ R such that a = ubv with uv = 1. As an application, we observe that exchange rings satisfying the n-stable range condition can be characterized by Drazin inverses. These also give nontrivial generalizations of [7, Theorem 10], [13, Theorem 10], [15, Theorem] and [16, Theorem. 2A].

• Journal of Korean Port Research
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• v.14 no.1
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• pp.77-86
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• 2000

The planning process of complex projects in oceanic architectural engineering is characterized by the cooperation of many involved specialists and by a high degree of information exchange. In order to improve the quality of the structural design of oceanic buildings, information of different involved partners in the planning process has to be integrated. This paper aims to introduce a concept of the integrated structural design for the floating-type oceanic building using STEP(Standard for the Exchange of Product Model Data). STEP(ISO 10303) is an international standard for the computer-interpretable representation and exchange of product data and it provides a consistent data exchange format and application interfaces between different application systems. In this paper, the structural design process and information of oceanic buildings is analyzed and product models are preposed fir the exchange of the structural design information between superstructure and floating structure. The entities for calculating wind loads, metacenter and restoring forces are represented by Express. As a case study a floating hotel is applicated to describe the STEP physical file.

• The Journal of Asian Finance, Economics and Business
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• v.2 no.3
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• pp.17-22
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• 2015

This paper examines the effect of impulsiveness of euro on Indian stock market. In order to examine the problem, we select rupee-euro exchange rates and S&P CNX NIFTY and BSE30 SENSEX to represent stock price. We select euro as it considered as second most widely used currency at the international level after dollar. The data are collected a daily basis over a period of 3-Apr-2007 to 30-Mar-2012. The statistical and time series properties of each and every variable have examined using the conventional unit root such as ADF and PP test. Adopting a generalized autoregressive conditional heteroskedasticity (GARCH) and exponential GARCH (EGARCH) model, the study suggests a negative relationship between exchange rate and stock prices in India. Even though India is a major trade partner of European Union, the study couldn't find any significant statistical effect of fluctuations in Euro-rupee exchange rates on stock prices. The study also reveals that shocks to exchange rate have symmetric effect on stock prices and exchange rate fluctuations have permanent effects on stock price volatility in India.

• Asian Journal for Public Opinion Research
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• v.4 no.2
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• pp.108-122
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• 2017

This study explores how South Korean citizens evaluate corporate social responsibility (CSR) practices based on communal and exchange relationships. Specifically, it examines whether their evaluations of the two types of relationships are related to their supportive opinions, such as positive attitudes toward corporations and behavioral intentions to purchase products. The findings show that the communal relationship between an energy corporation and its local residents is more related to their supportive opinions than exchange relationship. That is, a communal relationship tends to generate more positive business outcomes than an exchange relationship. This study concludes that corporations should prepare for useful community outreach and CSR programs for their local community. Practitioners need to focus on building communal relationships with community members through their programs.

• Journal of the Korean Data and Information Science Society
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• v.21 no.3
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• pp.493-502
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• 2010

For establishing forecasting confidence interval for exchange rate, it is critical to estimate distribution of the exchange rate properly. In this thesis, we use block bootstrap method to estimate the distribution of the exchange rate via sum of its daily ratios. As a result, an easier and more accurate forecasting method is provided.