• Environmental engineer
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• s.172
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• pp.18-23
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• 2000

(1) 기후변화협약 대응 필요성 - 우리 나라는 1998년 현재 세계 제11위의 이산화탄소 배출국으로서 OECD 가입 후 감축의무를 지우려는 선진국들의 압력을 거세게 받고 있음 - 우리 나라 환경전문가 중 73.5$\%$가 향후 5년 이내에 이산화탄소 의무 감축 부담을 지게 될 것으로 전망하고 있는 것으로 조사됨 - 외환위기로 인해 산업활동이 위축되었던 1998년에 이산화탄소 배출량은 11.3% 감소하였으나 1999년에는 전년 대비

• The Science & Technology
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• v.32 no.4 s.359
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• pp.72-74
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• 1999

우리나라의 생명공학기술 수준은 선진국에 비해 93년도 50%, 97년도 80% 수준으로 평가된다. 연구인력은 97년도 기준 4천4백35명이며 시장규모는 4천2백억원으로 세계시장에 비해 1.6% 수준이다. 최근 성공한 복제소 영롱이의 개발은 우리의 유전공학분야가 세계수준으로 진입했음을 증명해주는 쾌거이며 이제 우리나라도 세계 5번째 동물 복제국이 되었다.

• 산림경영
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• s.134
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• pp.12-27
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• 1998

최근 전세계적으로 강구되고 있는 지속가능한 산림경영을 위한 수단의 하나로서 선진국 및 목재생산국을 중심으로 급속하게 전개되고 있는 산림인증제도에 대하여 지난호에 이어 이번호에 소개하고자 한다. 산림인증제도는 국제기구 또는 독립된 기구에서 마련한 기준에 부합되게 산림을 관리하였을 경우 이를 인증하는 제도로서 만일 이 제도가 정착될 경우, 산림을 관리하고 있는 신주들이나 독림가에게는 매우 의미있는 제도라 할 수 있다. 이글은 World Wildlife Fund(WWF)에서 발행한 산림인증제도에 관한 소책자를 중심으로 번역한 것임을 밝혀둔다.

• 대한예방의학회:학술대회논문집
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• 1997.10b
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• pp.215-216
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• 1997

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2011.05a
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• pp.41-42
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• 2011

• Journal of Digital Convergence
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• v.10 no.8
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• pp.15-20
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• 2012

South Korea is carrying out and expanding smart grid pilot projects to build a framework for a national smart grid and expand overseas markets. It is important to properly evaluate performance for the projects and further develop related businesses in a more desirable direction. This study is to provide evaluation criteria for the performance of smart grid pilot projects and a basis for further continuous development according to the type of projects. Evaluation criteria were selected through reviews of documental materials and expert discussions. The viability of the proposed draft in the situation of South Korea was examined by expert Delphi surveys. The Delphi surveys were conducted twice, and therefrom drawn were 18 evaluation criteria for 6 evaluation categories.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.33 no.8C
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• pp.605-612
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• 2008

This paper researches the estimating location using repeater effect adjustment method in CDMA based system. Repeaters are commonly used by commercial and amateur radio operators to extend signals in the radio frequency range from one receiver to another. The repeater signals are increasing arrival time from base station to mobile station. So if we calculates the mobile station using repeater signals, the estimating position error is increased. However nobody researched about adjusting repeater effects. This paper proposes repeater effect adjustment algorithm. For adjusting repeater effects, we make the triangle using mobile station, reference base station and neighbor base station, and then detect the repeater effects using the triangle characteristic. The proposed method system showed the improved performance in estimating parameters and locating positions by computer simulations.

• Journal of the Korean Society of Marine Environment & Safety
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• v.9 no.1
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• pp.1-15
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• 2003

A recent trend of global shipping industry adopting Port State Control (PSC) system is recognized as a proficient mechanism in preventing maritime accident and protecting marine environment. Disadvantages of Korean shipping companies in PSC inspection are unavoidable as Tokyo MOU imposed priority listed flag to Korea Having stated above, appropriate research and prompt preparation in compliance with current PSC requirements for the Korean shipping companies have become an immediate need The objectives of this study are: First, to review in understanding of PSC in overall and foundation of enforcement. Second, to study interaction of international treaties regarding PSC. Third, to compare practical compliance among the countries and to open up a case study on Korean shipping companies in adopting PSC Last, to suggest direction to the Korea shipping companies the most proficient way in compliance with the current Tokyo MOU requirement.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.25 no.8A
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• pp.1223-1230
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• 2000

In this paper, we proposed a handoff decision method based on signal-to-interference ratio(SIR) of the pilot channel in order to perform a handoff more effectively and to complement disadvantages - deterioration quality of a call, decreasing capacity of the system, and wasting power of the mobile station - which is caused when handoff is performed by the classical method that execute a handoff based on received signal strength. Moreover, when we change that the minimum threshold, the cell loading which is defined active traffic channels to total traffic channels ratio, and the fraction of the transmit power from base station allocated to the pilot channel on the forward link of a DS-CDMA system, we analyzed mean numbers of handoff depending on hysteresis level during the mobile station moving from one base station to another base station.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2017.11a
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• pp.188-189
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• 2017

In recent years, the development of GPS navigation system (GNSS), which has been developed not only by US GPS but also by major countries, is entering its final stage. It is time to change the infrastructure and technology system to correct each satellite system. To do this, we analyze the performance of the differential information provided by National Maritime PNT Office for GLONASS currently operating in its normal orbit, and present the its feasibility.