• Title/Summary/Keyword: Ki Hyung-do

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Large-Scale Vacuum Technologies for $730{\times}920$ AMOLED Production; The world's largest OLED deposition system

  • Hwang, Changhun;Han, Seung-Jin;Kim, Do-Gon;Yook, Sim-Man;Kim, Seung-Han;Kim, Jin-Hyung;Kim, Beom-jai;Won, You-Tae;Park, Ki-Joo;Kim, Kwang-Ho;Kim, Byung-Seok;Kang, Teak-Sang;Kim, Jung-Hwan;Seo, Sang-Won;Song, Ha-Jin;Sim, Hyung-Bo;Noh, Young-Bo
    • 한국정보디스플레이학회:학술대회논문집
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    • 2005.07a
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    • pp.668-672
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    • 2005
  • Doosan DND, OLED manufacturing equipment maker, has developed the largest deposition system to produce $730{\times}920mm$ size AMOLED devices for the first time in the world. It is necessary for producing 40" AMOLED panels to develop the large-scaled vacuum technologies including ICP plasma, stretching glass chuck, organic deposition, metal deposition and hybrid encapsulation processes.

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Human Head Size and SAR Characteristics for Handset Exposure

  • Lee, Ae-Kyoung;Choi, Hyung-Do;Lee, Hyung-Soo;Pack, Jeong-Ki
    • ETRI Journal
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    • v.24 no.2
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    • pp.176-179
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    • 2002
  • Using scaled models for an anatomical head model and a simple head model, we investigated the effects of head size on specific absorption rate characteristics for two mobile phones operating at 835 MHz and 1765 MHz. Our results showed that a larger head produced a higher localized SAR at 835 MHz. However, at 1765 MHz, the differences among the head models were insignificant since the superficial absorption was dominant over the effects of head shape and size. A larger head produced a lower whole-head averaged SAR at both frequencies.

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Study on Difference of Wordvectors Analysis Induced by Text Preprocessing for Deep Learning (딥러닝을 위한 텍스트 전처리에 따른 단어벡터 분석의 차이 연구)

  • Ko, Kwang-Ho
    • The Journal of the Convergence on Culture Technology
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    • v.8 no.5
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    • pp.489-495
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    • 2022
  • It makes difference to LSTM D/L(Deep Learning) results for language model construction as the corpus preprocess changes. An LSTM model was trained with a famouse literaure poems(Ki Hyung-do's work) for training corpus in the study. You get the two wordvector sets for two corpus sets of the original text and eraised word ending text each once D/L training completed. It's been inspected of the similarity/analogy operation results, the positions of the wordvectors in 2D plane and the generated texts by the language models for the two different corpus sets. The suggested words by the silmilarity/analogy operations are changed for the corpus sets but they are related well considering the corpus characteristics as a literature work. The positions of the wordvectors are different for each corpus sets but the words sustained the basic meanings and the generated texts are different for each corpus sets also but they have the taste of the original style. It's supposed that the D/L language model can be a useful tool to enjoy the literature in object and in diverse with the analysis results shown in the study.

Stability Condition of Robust and Non-fragile $H^{\infty}$ Hovering Control with Real-time Tuning Available Fuzzy Compensator

  • Kim, Joon-Ki;Lim, Do-Hyung;Kim, Won-Ki;Kang, Soon-Ju;Park, Hong-Bae
    • International Journal of Control, Automation, and Systems
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    • v.5 no.4
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    • pp.364-371
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    • 2007
  • In this paper, we describe the synthesis of robust and non-fragile $H^{\infty}$ state feedback controllers for linear systems with affine parameter uncertainties, as well as a static state feedback controller with poly topic uncertainty. The sufficient condition of controller existence, the design method of robust and non-fragile $H^{\infty}$ static state feedback controller with fuzzy compensator, and the region of controllers that satisfies non-fragility are presented. We show that the resulting controller guarantees the asymptotic stability and disturbance attenuation of the closed loop system in spite of controller gain variations within a resulted polytopic region.

An Analytical Study of Slope Stability to Reinforcement Stage in Cut Slope (절개사면에서의 보강단계별 사면안정성에 대한 해석적 연구)

  • Kang, Ki-Chun;Song, Young-Suk;Hong, Won-Pyo;Kim, Tae-Hyung
    • Proceedings of the Korean Geotechical Society Conference
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    • 2006.03a
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    • pp.724-731
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    • 2006
  • The purpose of this study is to estimate a landslide using the SLOPILE program from the slope reinforced by slope stability systems such as soil nailing and pile. To do this, cutting slope located at Donghae-Highway in Kwangwon-Do was considered. The behavior of slope was monitored for a long term by using instrumentation according to the reinforcement stages. The sequence of reinforcement stages was followed as pile installation, boring, soil nailing installation, anchoring and embankment. The result from this case study shows that the safety factor of slope depends on the reinforcement stage more or less.

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DOS Attack on the Availability of Cloud Network and its Avoidance Mechanism

  • Zaidi, Syed Muhammad Asad;Baig, Waleed Akram;Redwan, Hassan;Kim, Ki-Hyung
    • Proceedings of the Korea Information Processing Society Conference
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    • 2011.04a
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    • pp.760-762
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    • 2011
  • Data centers are usually under provisioned. This is not a problem in corporate data networks, but it can be a problem in cloud data networks. If an application is being served by that cloud infrastructure, the application owner must know the infrastructure limitations and should take some special measures to ensure QoS/availability of that application and to prevent against possible threats. In this paper we have discussed a new form of DoS that could take place in a cloud data network using the vulnerability caused by under provisioned network. We have also proposed a solution for this DoS attack, by which not only this attack will be detected, but can also be avoided in a very short time.