• 대한방사선방어학회:학술대회논문집
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• 2011.11a
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• pp.146-147
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• 2011

• Annual Conference on Human and Language Technology
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• 2021.10a
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• pp.287-292
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• 2021

좋은 자연어 이해 시스템은 인간과 같이 텍스트에서 단순히 단어나 문장의 형태를 인식하는 것 뿐만 아니라 실제로 그 글이 의미하는 바를 정확하게 추론할 수 있어야 한다. 이 논문에서 우리는 뉴스 헤드라인으로 뉴스의 토픽을 분류하는 open benchmark인 KLUE(Korean Language Understanding Evaluation)에 대하여 기존에 비교 실험이 진행되지 않은 시중에 공개된 다양한 한국어 라지스케일 모델들의 성능을 비교하고 결과에 대한 원인을 실증적으로 분석하려고 한다. KoBERT, KoBART, KoELECTRA, 그리고 KcELECTRA 총 네가지 베이스라인 모델들을 주어진 뉴스 헤드라인을 일곱가지 클래스로 분류하는 KLUE-TC benchmark에 대해 실험한 결과 KoBERT가 86.7 accuracy로 가장 좋은 성능을 보여주었다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.747-750
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• 2008

JPEG(Joint Photographic Expert Group)은 손실 압축 기법을 사용하여 데이터 양을 20:1 이상으로 현저히 줄이면서도 원 영상과 거의 유사한 영상을 복원할 수 있도록 해주기 때문에, 요즘 디지털 카메라 및 휴대폰 등 영상을 저장할 매 대부분 Exif(Exchangeable image file format)로 JPEG 압축형식을 널리 사용하고 있다. 본 논문은 JPEG 베이스라인 모드로 압축되어진 영상의 디코딩 단계에서 필요한 비계층형 헤더를 파싱하는 모듈의 기능을 소프트웨어로 모델링하고 VHDL을 이용하여 회로를 합성하고 동작을 검증하였다. 설계 결과 Xilinx xc3s1000 fg676-4 환경에서 154.488MHz의 동작속도를 나타내었고, JPEG 디코더의 고속 데이터 처리에 적응 가능하다.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.24 no.2 s.173
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• pp.311-318
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• 2000

Several factors which influence baseline instability (BLI) phenomenon in MR drive were investigated experimentally. In particular, the role of surface topography on BLI was studied in detail. The r esults show that BLI is linearly proportional to the surface waviness with a spatial wavelength of 0.4 to 5.0 min. BLI becomes worse as the surface waviness increases. On the other hand, surface roughness which has a spatial wavelength below 25 $\mu$ m has no effect on BLI. The results further show that the effect of bias current on the BLI is amplified on the disk with worse surface waviness. The disk surface waviness is dependent on the manufacturing process and becomes an inherent surface property of media. The disk surface waviness. therefore, can not be overlooked when evaluating the media for a high-performance hard disk drive. In general, waviness is reduced mainly during grinding and polishing process during manufacturing.

• 한국신재생에너지학회:학술대회논문집
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• 2007.11a
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• pp.673-676
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• 2007

교토의정서의 발효로 인해 전세계적으로 온실가스 감축 활동이 활발하게 진행되고 있으며, 국내 산업계 또한 온실가스 저감을 피할 수 없게 되었다. 특히 교토의정서 이행을 위해 도입된 교토메카니즘 가운데 개발도상국의 온실가스 감축 활동을 위해 CDM 사업이 활성화되고 있으며, 개발도상국인 우리나라도 참여할 수 있기 때문에 국내 기업 및 정부의 관심이 높아지고 있다. 그러나 CDM 사업을 수행하기 위해서는 적용 가능한 CDM 사업 방법론이 필요하며, 방법론이 없을 경우 CDM 사업 방법론을 개발하여야 한다. 방법론에는 베이스라인, 추가성, 배출 감축량 등에 대한 구체적인 방법이 제시되어야 하고 사업의 타당성 확인 및 검증을 위해 방법론을 정확히 이해해야 한다. 따라서 본 CDM 사업 방법론 연구를 통해 CDM 사업 수행 및 방법론 개발을 위해 필요한 주요 항목에 대한 이해를 돕고 국내 CDM 사업의 활성화를 도모하고자 한다.

• Journal of Environmental Policy
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• v.12 no.4
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• pp.45-69
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• 2013

This study estimates baseline greenhouse gas emissions from transport sector when a new town is developed. It has adopted a general greenhouse gas estimation model developed by Schipper, celine, Roger(2000) for the estimation, and showed how various transport related statistics can be utilized in detail. Particularly, it has produced unit greenhouse gas emission factor per vehicle types, vehicle-km, and trip-km. To evaluate effects of greenhouse gas reduction policies, it has calculated how much emissions will be reduced from bicycle promotion. It has turned out that about 369 thousand tons of carbon dioxide will be emitted from transport sector once the 1st Geomdan New Town is developed in Incheon metropolitan city. If the policy of bicycle promotion can attract people to use bicycle as much as 5% of total trips, then it can reduce about 1,869 tons of carbon dioxide.

• Broadcasting and Media Magazine
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• v.7 no.3
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• pp.12-18
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• 2002

JVT is an international video coding standard that is being developed jointly by VCEG of ITU and MPEG of ISO. The standardization efforts are targeted mainly for a very high compression ratio. JVT is a general video coding technology that may be used in various application fields. JVT began to work seriously on the profiles and levels issues since Geneva meeting, January 2002. Profiles are sub sets of technical tools from the entire tools and levels limit processing power and memory resources of a decoder As of now, three profiles of Baseline, Main and X (not defined name yet) and hierarchically structured levels are defined in JVT FCD. The profiling issue is very important for the JVT s initial objective of Baseline royalty free policy. Royalty free Baseline profiling is currently under practical hurdles and this issue may impact as one of critical factors on the success of JVT standard.

• Journal of Broadcast Engineering
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• v.14 no.1
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• pp.3-14
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• 2009

Currently, H.264/AVC is used in many multimedia applications. Also, The MPEG-2 main profile which supports B pictures for bi-directional motion prediction is widely used in applications such as HDTV and DVD’s. Therefore, transcoding the MPEG-2 main profile to the H.264/AVC baseline is necessary for universal multimedia access. In this transcoding architecture including the GOP structure conversion, the proposed algorithms adopt the adaptive search range selection through the linearity test of a predictive motion vector and adaptive mode selection using the reference region complexity information. The proposed algorithms extremely reduce the computational complexity while maintaining the video quality.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.1
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• pp.603-613
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• 2021

As a core policy for achieving the goal of reducing greenhouse gas emissions in the building sector, Korea has enforced the mandatory certification of zero energy buildings for new public buildings from 2020. This study suggests energy-saving technologies and economic factors that building officials can refer to for decision-making on the implementation of zero energy buildings. For this study, the construction cost for the energy item of a building was analyzed by collecting the building energy efficiency level certification data and detailed construction cost statement data from public institutions for the last three years. Based on the building energy efficiency certification data, each energy item of the baseline building was derived, and the energy performance of the zero energy building was derived through repetitive simulations by gradually increasing the energy performance value of the baseline building. By applying the analyzed construction cost, the construction cost for each energy item of the baseline and zero energy buildings was derived. As a result, the lighting equipment contributed up to 10.5% energy savings, and the increase in construction cost of the cooling and heating system was at least 9.1%.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.26 no.11A
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• pp.1858-1863
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• 2001

SAR data consist of magnitude and phase, and IFSAR technique using phase data is very useful high technology Producing fee height information. To use IFSAR technique effectively in the operation of SAR, this paper suggests the essential requirement and main consideration during SAR design process. Also the critical baseline, one of the principal elements, is derived, and it proposes applicable method through the simulation and discussion to the E-SAR.