• Annual Conference on Human and Language Technology
• /
• 1989.10a
• /
• pp.126-131
• /
• 1989

본 논문에서는 Error Back Propagation 학습을 이용해 한글 문자를 On-Line 인식하는 시스템을 제안한다. Pointing device의 궤적을 추적해 입력 패턴의 특징(feature)을 추출해 신경 회로망 입력으로 준다. 이때 사용하는 특징은 기본 획 (stroke)의 종류 및 획간의 상대적 위치 관계이다. 학습과정에서는 자소의 정의를 읽어 초성, 중성, 종성에 대해 각 획수마다 정의된 신경회로망의 weight를 조정한다. 인식 과정에서는 초성, 중성, 종성의 순으로 에러가 최소인 획수의 신경회로망 출력을 택하여 2 바이트 조합형 코드로 완성한다. 이로써 Intelligent Man-Machine Interface 시스템중 위치 및 크기에 무관한 전필 입력 시스템을 구현한다.

• The Korean Journal of Ecology
• /
• v.8 no.2
• /
• pp.99-107
• /
• 1985

Photosynthetically Active Radiation (PAR) affects the growth of plants as well as their photosynthetic rates. A mathematical model for intercepted solar radiation on the tilted leaf with any azimuth angle was established and the leaf orientation in which receives the maximum solar radiation was determined each month, during the growing season, and for an year. PAR was maximized at the leaf elevation of 50。~60。 in the winter, at that of 20。~40。. On the whole the leaves of tilt angle 0。~40。 received much radiation comparing with those of other tilt angles. The theoretical tendencies were compared with the distribution of leaf orientation measused practically. The average leaf elevation of maple tree was 17.0。$\pm$12.0。, and that of ginkgo was 29.8。$\pm$16.0。. Several results from other literatures support our suggestion that cumulative effevct of the relationships between surface normal vector and a vector pointing in the direction of the radiation determine the leaf orientation.

• The Bulletin of The Korean Astronomical Society
• /
• v.40 no.2
• /
• pp.33.2-33.2
• /
• 2015

The color distribution functions (CDFs) of globular clusters (GCs) in individual early-type galaxies show great diversity in their morphology. Based on the conventional "linear" relationship between colors and metallicities of GCs, the inferred GC metallicity distribution functions and thus their formation histories should be as diverse as they appear. In contrast, an alternative scenario rooted in the "nonlinear" nature of the color-to-metallicity transformation finds the various CDFs pointing systematically to a simple picture, i.e., such a high degree of variety stems predominately from only one parameter, the mean metallicity of GCs. The simulated CDFs of GCs aimed to reproduce 67 massive early-type galaxies from the ACS Virgo & Fornax Cluster Survey show that over 70% of the CDFs concur fully with the nonlinearity scenario. We discuss our new findings in terms of early-type galaxy formation in the cluster environment.

• Publications of The Korean Astronomical Society
• /
• v.32 no.1
• /
• pp.33-35
• /
• 2017

We have been working on data processing and calibration of AKARI/IRC images from pointed observations. As of September 2014, a data package for each pointing only contains raw data and quick-look data, so that users have to process them using the toolkit by themselves. We plan to change this situation and to provide science-ready data sets, which are easy-to-use for non-AKARI experts. For Phase 1&2, we have updated dark and flat calibrations, and also the toolkit itself to produce images more reliable and easier to use. A new data package includes fully calibrated images with WCS information. We released it for about 4000 pointings at the end of March 2015.

• 한국데이터정보과학회:학술대회논문집
• /
• 2005.04a
• /
• pp.145-154
• /
• 2005

There have been some controversies on the use of the coefficient of determination for linear no-intercept model. One definition of the coefficient of determination, $R^2=\sum\;{y}{^{\hat{2}}/\sum\;{y^2}$, is being widely accepted only for linear no-intercept models though Kvalseth(1985) demonstrated some possible pitfalls in using such $R^2$. Main objective of this article is to provide a cautionary notice for use of the $R^2$ by pointing out its tricky aspects by means of empirical simulations.

• Journal of the Korean Society for Aviation and Aeronautics
• /
• v.22 no.1
• /
• pp.15-21
• /
• 2014

Modern aircraft air navigation has been changed from the conventional air navigation aid to utilizing Global Navigation Satellite System. For the air navigation of fast moving aircraft, GNSS required extremely high accuracy and reliability. This study reviews the basic concept of Satellite Based Augmentation System which is discussed in the International Working Group of International Civil Aviation Organization and status of some SBAS leading State's case. In addition to that, a progress of SBAS development and implementation in the Republic of Korea was reviewed with pointing out of general hurdles and counter measures.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2005.05a
• /
• pp.164-169
• /
• 2005

Microphone array techniques are being used widely in wind tunnel measurements for identification of the distributed aerodynamic noise sources on the model being tested. Depending on the frequencies and sound levels, conventional beamforming algorithm has limitation in separating two adjacent sources. Several modifications to the classical beamforming have been developed to enhance way resolution and reduce sidelobe levels. In this Paper the robust adaptive beamforming and the CLEAN algorithm are used to compare to the result of conventional beamforming method. It is found that the CLEAN algorithm is capable of pin-pointing locations of multiple sources nearby, while these sources are unidentifiable with robust adaptive or conventional beamforming techniques.

• Journal of Institute of Control, Robotics and Systems
• /
• v.5 no.3
• /
• pp.370-378
• /
• 1999

KOMPSAT is a three-axis stabilized light weight satellite, and one of the main mission objectives of the KOMPSAT is to conduct scientific and technological analysis in the areas of high resolution imaging and ocean color imaging. This kind of mission requires the satellite to roll up to 45 degrees. Bang-bang control for this rolling maneuver may activate the flexible modes, and therefore cause satellite pointing performance degradation. To deal with this problem, the roll attitude control system, especially for the science mode and maneuver mode of the KOMPSAT, is first verified by numerical simulation. And the open-loop control law for roll maneuver is proposed by use of series expansion and optimization. The proposed control law is applied to KOMPSAT to see its effectiveness.

• English Language & Literature Teaching
• /
• v.10 no.2
• /
• pp.25-42
• /
• 2004

This paper explores some possible interpretations of subject/object in child language, pointing out some potential problems in recent works within the minimalist framework and suggesting different views on it. Particularly, we will focus on how to identify and/or license objects, since most of the studies relevant to this issue have accounted for subjects only. Discussing the results of the studies on child language data, we will show that previous syntactic explanations on subjects, which have seemed quite attractive and refined, may not hold when accounting for objects and various aspects and properties of arguments in those child languages. In doing so, we will suggest and support a performance-based account, a discourse-based account, and a markedness account.

• 한국HCI학회:학술대회논문집
• /
• 2009.02a
• /
• pp.646-649
• /
• 2009

최근 가정에서 사용되고 기기 중 원격제어기(Remote controller)로 제어가 가능한 기기가 늘어나고 있다. 이에 따라 여러 기기들이 있는 경우 사용자는 기기들을 동시 제어하려 할 때 제어하고자 하는 제어대상에 맞는 원격제어기를 찾기 위해 많은 시간을 소비하는 경우가 일반적이다. 이러한 불편함이 증가함에 따라 통합원격제어기(Universal remote controller)의 보급이 증가하고 있으나, 여전히 여러 기기를 동시제어하고자 할 경우 제어코드의 입력 등 복잡한 절차를 걸쳐 사용할 수 밖에 없으며, 이러한 점은 결국 통합원격제어기의 사용성을 현저히 약화시킨다. 본 고에서는 인간이 제어대상기기를 제어하고자 하는 의도를 원격제어기에 전달하는 여러 방법 중 인간이 물체를 인식하는 것과 동일한 메타포인 직관적인 '지시(Pointing)'법을 사용하여 실시간으로 다중기기를 통합 제어하는 방법, 즉 지시통합제어방법(Point and Control)에 대한 센서 및 하드웨어구조를 설명하고, 구동방식을 제안한다.