• 한국통신학회:학술대회논문집
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• 한국통신학회 2004년도 하계종합학술발표회논문초록집
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• pp.207-207
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• 2004

• 한국통신학회:학술대회논문집
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• 한국통신학회 2004년도 하계종합학술발표회논문초록집
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• pp.284-284
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• 2004

• 한국통신학회:학술대회논문집
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• 한국통신학회 2004년도 하계종합학술발표회논문초록집
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• pp.272-272
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• 2004

• 한국통신학회:학술대회논문집
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• 한국통신학회 2004년도 하계종합학술발표회논문초록집
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• pp.214-214
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• 2004

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2005년도 후기학술대회논문집
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• pp.65-66
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• 2005

This paper presents an adaptive satellite communication systems to adapt channel environment. High performance coding and modulation techniques are applied to poor channel condition, otherwise, bandwidth efficient coding and modulation techniques are applied to good channel condition to obtain high transmission rate.

• 한국정보처리학회논문지
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• 제6권11호
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• pp.2922-2931
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• 1999

본 논문에서는 이질적인 통신망 환경에서 다양한 QoS 요구에 적응할 수 있는 MPEG-2 비디오의 스케일러블 미디어 객체 프레임웍을 제안한다. 하나의 MPEG-2 비디오는 시간적인 스케일링과 충실도 스케일링 과정을 통하여 상호 종속성이 있는 스케일러블 미디어 객체의 집함으로 변환된다. 미디어 서비스 요청에 대하여 스케일러블 미디어 객체의 전체 혹은 일부를 전송함으로써 다양하게 요구된 QoS에 따른 전송 비트율을 만족시킬 수 있다. 또한, 다양한 대역폭의 링크가 개입된 멀티포인트 채널에 대해서도 각 QoS를 만족시킬 수 있는 기반을 제공한다. 전송된 데이타 양과 신호왜곡 특성을 분석을 통하여 스케일러블 미디어 객체가 폭넓은 QoS 요구에 적응할 수 있음을 보였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.98-100
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• 2011

High speed Train Systems are the energy supplied system via the pantograph through which the voltage and the current supplied by the catenary wire flow. The arc discharges generate owing to the contact loss between the catenary and the pantograph, and the electromagnetic fields radiate. There are many different phenomena between the static charges and the moving charges in view of the radiated electromagnetic fields. To calculate the electromagnetic filed about the moving charges, it is necessary to adapt Lorentz transformation. Actually, the particle which moves near the speed of light has the relativisitic phenomena. In addition, it is necessary to predict the electromagnetic field because the radiated electromagnetic field takes effect on the near electronic devices and the human beings. In this paper, we model the arc discharge into the dipole antenna model, adapt Lorentz transformation to the case that the electric railway cars move, and calculate the radiated electromagnetic field. By the calculation, we take the basis upon the electromagnetic prediction, and apply to the future research.

• IEIE Transactions on Smart Processing and Computing
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• 제3권5호
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• pp.319-324
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• 2014

Web applications make life more convenient. Many web applications have several kinds of user input (e.g. personal information, a user's comment of commercial goods, etc.) for the activities. On the other hand, there are a range of vulnerabilities in the input functions of Web applications. Malicious actions can be attempted using the free accessibility of many web applications. Attacks by the exploitation of these input vulnerabilities can be achieved by injecting malicious web code; it enables one to perform a variety of illegal actions, such as SQL Injection Attacks (SQLIAs) and Cross Site Scripting (XSS). These actions come down to theft, replacing personal information, or phishing. The existing solutions use a parser for the code, are limited to fixed and very small patterns, and are difficult to adapt to variations. A machine learning method can give leverage to cover a far broader range of malicious web code and is easy to adapt to variations and changes. Therefore, this paper suggests the adaptable classification of malicious web code by machine learning approaches for detecting the exploitation user inputs. The approach usually identifies the "looks-like malicious" code for real malicious code. More detailed classification using sequence information is also introduced. The precision for the "looks-like malicious code" is 99% and for the precise classification with sequence is 90%.

• Architectural research
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• 제12권2호
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• pp.1-7
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• 2010

Science (natural science) is the systematic attempt to understand and interpret the nature phenomenon. For this reason, architects have used science to adapt nature to their design. With the rise of modern science, architecture became more closely related with science. Science available to develop new technology for architecture and it influenced architect's idea and concept. Symbolically, Architects use method or process of science to generate building form. The Rules of compositing particles in the chemistry or DNA (deoxyribonucleic acid) in the biology are used to generate a form of building. Literally, Architects use technology as a tool of science to improve physical performance of architecture. Like mathematical understanding of structure load enabled people to construct enclosure without columns or any of support system inside of architecture. Still natural phenomenon is not fully understood as science and science is still discovering a new phenomenon or changing its theory to adapt new discovery. New discovery or limitation of science influenced architecture throughout the history. This paper is to discuss how architectural theories are rest upon idea set forth by science. In addition, how technology as a tool of science has been utilized in architecture.

• 디지털융복합연구
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• 제10권1호
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• pp.357-364
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• 2012

소프트웨어의 폐쇄적 지적재산권에 대한 저항으로 자유소프트웨어 운동이 추진되어 라이선스에서 제시한 사항을 이행하는 사람은 누구나 자유롭게 소프트웨어를 이용하고 개작할 수도 있는 오픈소스 소프트웨어가 널리 이용되고 있다. 오픈소스소프트웨어는 제품의 개발시간과 비용을 줄일 수 있고 이를 사용하는 많은 사람들의 검증을 거치게 되므로 개선되고 발전되어 간다. 그러나 이러한 장점과 더불어 무분별한 사용으로 분쟁의 발생위험도 높다. 이에 본 연구에서는 오픈소스 소프트웨어 분쟁 사례를 분석하여 오픈소스소프트웨어의 저작권 침해를 방지하고 적법하게 오픈소스소프트웨어를 이용할 수 있는 사용자 환경을 제시하고자 한다.