• Bulletin of the Korean Mathematical Society
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• v.34 no.2
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• pp.225-231
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• 1997

In 1970's Goodykoontz gave characterizations of connectedness imkleinen and locally arcwise connectedness of $2^X$ only at singleton set {x} ${\epsilon} 2^X$ [5,6,7]. In [7], we gave necessary conditions for C(X) to be arcwise connected im kileinen at any point $A {\epsilon} C(X)$.

• Mass Spectrometry Letters
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• v.8 no.4
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• pp.79-89
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• 2017

Ion mobility mass spectrometry (IM-MS) combines the advantages of ion mobility spectrometry (IMS) and MS for effective gas-phase ion analysis. Separation of ions based on their mobilities prior to MS can be performed without a great loss in other analytical figures of merit, and the extra dimension of analysis offered by IM can be beneficial for isomer and complex sample analyses. In this review, basic principles of IMS and IM-MS are described in addition to an introduction to various IMS techniques and commercial IM-MS instruments. The nature of collision cross-section (${\Omega}_D$), an important parameter determining the transport properties of ions in IMS, is also explained in detail.

• Proceedings of the KIPE Conference
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• 2001.12a
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• pp.3-6
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• 2001

This paper designs a drive for high efficiency of the 3-phase IM (induction motor) for FCU(Fan Coil Unit). The speed control system of 3-phase IM for FCU has been implemented by a TMS320LF2406 DSP chip. The DSP TMS320LF2406, which include the most peripheral circuit for control of the Industrial motor suitable for AC motor drive. This type of the controller can be obtained low cost and high reliance. The proposed drive system of the 3-phase IM for the FCU is verified by simulation. The results show the speed control characteristics of the control strategy Proposed for 3-Phase IM drive.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1998.11a
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• pp.295-298
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• 1998

We have investigated ionic conductivity and electrochemical stability of the electrolytes containing organic solvent. Ion conductivities were measured between 10 and 80$^{\circ}C$, and electrochemical stabilities were determined by cyclic voltammetry on glassy carbon, platinum and aluminum electrodes. Ionic conductivity of electrolyte(EC:DEC=1:1) with IM LiPF$\_$6/ shows better than that of the other electrolytes having Li salts. The IM LiBF$_4$-PC electrolyte exhibits good electrochemical stability. IM LiPF$\_$6/ (EC:DEC=1:1) and IM LiPF$\_$6/ (EC:DMC=1:1) electrolytes are used for the high capacity of battery system.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10c
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• pp.516-520
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• 2007

This paper presents a intuitive, simple and easy smart home TV remote control system using the hand gesture recognition. Hand candidate regions are detected by cascading policy of the part of human anatomy on the disparity map image, Exact hand region is extracted by the graph-cuts algorithm using the skin color information. Hand postures are represented by shape features which are extracted by a simple shape extraction method. We use the forward spotting accumulative HMMs for a smart home TV remote control system. Experimental results show that the proposed system has a good recognition rate of 97.33 % for TV remote control in real-time.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10c
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• pp.495-500
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• 2007

2차원 기반의 얼굴 분석 및 처리 알고리즘은 포즈 및 조명에 강인하지 못한 문제점들이 존재한다. 이러한 이유로 3차원 기반의 얼굴 분석 및 처리 분야에 많은 연구를 진행하려 하였지만, 컴퓨팅 파워의 한계와 고속 스캐너의 부재 등으로 많은 연구가 진행되지 못하였다. 하지만 오늘날 하루가 다르게 빨라지고 있는 컴퓨터의 성능으로 인해 추출했던 연구들이 다시 진행되고 있다. 이에 본 논문에서는 영상 등록(image Registration) 알고리즘의 한 종류인 Inverse Compositional Image Alignment 알고리즘을 3차원 모퍼블 모델에 적용 및 구현을 하였으며, 기존의 다른 영상 등록 알고리즘과 비교를 하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05b
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• pp.1281-1284
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• 2003

인스턴트 메시징(Instant Messaging: IM) 서비스는 인터넷 또는 IP 네트워크상에서 온라인 상태에 있는 사용자들간에 간단한 메시지를 주고 반을 수 있는 서비스이다. Presence 서비스는 통신을 원하는 사용자들의 온라인 상태 및 최신의 위치 정보를 제공함으로써 IM 서비스와 같은 Presence 정보를 기반으로 하는 다른 응용 서비스와 연계하여 활용할 수 있다. 본 논문에서는 이러한 Presence 서비스와 IM 서비스를 통합한 시스템을 SIP(Session Initiation Protocol)를 기반으로 하여 구현하였다. SIP는 텍스트 기반의 호설정을 처리하는 프로토콜로서 혜더 부분의 확장을 통해 다른 응용 서비스에 쉽게 적용이 가능한 장점을 가지고 있다. 구현된 시스템에서 Presence 서비스의 Presence 정보는 XML로 인코드된 CPIM(Common Presence and Instant Messaging) PIDF(Presence Information Data Format) 포맷으로 하여 처리하였고 IM 서비스는 페이저 모델(Pager Model)로 구현하였다 또한 시스템 내에서 필요한 보든 인증 처리 부분을 RFC 2617에 정의되어 있는 HTTP 다이제스트 인증을 사용하여 보안기능을 높였다.

• Journal of Science of Art and Design
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• v.5
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• pp.67-86
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• 2003

In der vorliegenden Arbeit geht es um die Rezeptionsproblem des Bildes im Zeitalter der neuen Median. Heuzutage erleben wir einen Medien-Boom, bzw. digital-Medien. Manche Theoretiker diskutieren deshalb ueber das Problem der digital-Median in den verschiedenen Bereich. Im Bereich der Kunst und Kultur handelt os sich auch urn die Varaenderung des Kunstwerkes, der Rezeption und der Herstellung des Kunstwerkes. In dieser Fragestellung ist es wichtig, das Problem ueber Bild zu erlaeutern, weil das Bild abhaengig von den Medien ist. Durch Medien wird das Bild veraendern koennen. Und auch wird die Rezeption des Bildes veraendern muessen. In Zeitalter der neunen Medien, bzw digital Medien, veraenderten sich die Rezeption des Bildes von der konzentrativen Rezeption zur zerstreuuten und konzentrativen Rezeption. Diese erneuerte Rezeption nenne ich das zerstreuute Kontemplation. Das ist eine Rezeption im Zeitalter der neuen Medien.

• Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
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• v.4
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• pp.109-128
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• 2001

Bei vorliegender Arbeit wurde eine sogenannte Diskursstrukturgrammatik (DSG) vorgestellt, die auf die $Erkl\"{a}rung$ von verschiedenen diskursbezogenen $Ph\"{a}nomenen$ zielt, und derer Grundlage auf 'Head-driven Phrase Structure Grammar (HPSG)' basiert. Im Abschnitt 2 wurde die Syntax von DSG gegeben. Die Syntax besteht aus Grundsymbolen und Regeln. Die Grundsymbole teilen sich wiederum in grundlegende Diskurseinheiten und logische Konnektoren ein. Entsprechend der Syntax wurde die Semantik im Abschnitt 3 gegeben. Insbesondere habe ich das Diskursrelation­Prinzip aufgestellt, nach dem die Information eines Konnektoren die Bedeutung der neu gebildeten Diskurseinheit bestimmt. Im letzten Abschnitt 4 habe ich anhand der DSG zwei Beispiele analysiert, um zu zeigen, wie die DSG funktioniert. Von der Theorie aus gesehen, ist die vorgestellte DSG nicht $vollst\"{a}ndig$. Deshalb werde ich weiter die DSG systematisieren, indem ich andere $Ph\"{a}nomene$ im Bereich des Diskurses wie Anapher, Tempus usw. behandle

• Journal of the Korean Institute of Telematics and Electronics
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• v.25 no.1
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• pp.42-48
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• 1988

MM(multimode) PWM(pulse width modulation) Suitable for high performance and harmonic effects minimization of VSI (voltabge source invertetr)-IM (induction motor)drive system is proposed. The approximated optimal, suboptimal and optimal PWM are implemented in the low frequency range, while square wave operation is realized in the hibh frequency range. The pulse width Modulator is capable of generating control signals to a transistorized inverter operating at about 1KHz. All functions except digital comparison have been implemented in softyware making the scheme economical, flexible and reliable. Pulse width modulator is built and tested experimentally. In order to confirm the effectiveness and the reliability of the theoretical proposition, this scheme is applied to 1Hp, Three phase IM. As results, it is concluded that the scheme of MM PWM is superior to other conventional switching scheme through the discussions or analysis carried out on the items such as line-to-line voltage, current and spectrum of current harmonic components observed at the output terminal of inverter, noise level of motor.