• Title/Summary/Keyword: 金達寿

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An adaptive IIR echo canceller with adaptive compensator (적응 보상기를 채용한 적응 순환 방향제거기)

  • 최삼길;김달수
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.21 no.4
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    • pp.876-883
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    • 1996
  • Adaptive FIR filters are widely used in the echo canceller. But, most of practical systems have the transfer function composed of poles and zeros. In that case, adaptive IIR filters may be more efficient rather than FIR fiters. In this paper, a recently developed C-HARF algorithm is used to implement an adaptive IIR echo canceller. The proposed convergence of the algorithm make it attractive for this application. Extensive computer simulations show that C-HARF algorithm performs better than the NLMS algorithm after convergence, although C-HARF algorithm converges more slowly.

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Constrained Multichannel Adaptive FIR Beamforming Algorithm Based upon Least Squares Method (최소자승법을 이용한 Constrained Multichannel FIR 적응 빔 형성 알고리즘)

  • 김달수;신윤기;박의열
    • Journal of the Korean Institute of Telematics and Electronics A
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    • v.28A no.9
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    • pp.671-679
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    • 1991
  • In adaptive antenna, several models are known according to a prior knowledge about jammer signal. Among those, Frost model with contraint is generally used however it has the problem that convergence speed is slow and that stability is not good. To improve such problems, this paper proposes constrained NLMS algorithm using LS method. In addition, the result obtained by applying this algorithm to Duvall antenna model is compared with that of Frost model.

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Surgical Complication and Its Management in Ischemic Stroke (허혈성뇌졸중의 수술치료시 동반되는 합병증과 관리)

  • Kim, Dal Soo;Yoo, Do Sung;Huh, Pil Woo;Cho, Kyoung Suok;Kang, Joon Ki
    • Journal of Korean Neurosurgical Society
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    • v.29 no.8
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    • pp.1107-1112
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    • 2000
  • Recently various operative procedures including microsurgery or endovascular surgery have been increasing for the management of ischemic cerebrovascular diseases. Carotid endarterectomy(CEA), extracranial-intracranial(EC-IC) arterial bypass, embolectomy, decompressive craniectomy, arterial transposition, intravascular thrombolysis, and percutaneous transarterial angioplasty and stenting (PTAS) are available surgical modalities for ischemic stroke. This article focuses the complications and perioperative management of patients treated with CEA and carotid PTAS among various surgical managements for ischemic stroke.

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Multichannel Adaptive IIR Beamforming Algorithm of Output Error Method (출력오차방법의 다채널 IIR 적응 빔 형성 알고리즘)

  • 김달수;박의열
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.18 no.4
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    • pp.530-536
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    • 1993
  • In adaptive antenna, recently Gooch suggested a new adaptive system using equation error method, but the system demands inverse model about the pole part and thus does not guarantee stability. In this paper, algorithm is proposed that has a basis on Popov's extra-stability theory. And system is developed of output error method. In addition, the result obtained by applying proposed algorithm to system of output error method is compared with that of Gooch model.

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Study of a New LOCOS Process Using Only Thin LPCVD Nitride (LPCVD 질화막 만을 이용한 새로운 LOCOS 공정에 관한 연구)

  • Kim, Ji-Bum;Oh, Ki-Young;Kim, Dal-Soo;Joo, Seung-Ki;Choi, Min-Sung
    • Proceedings of the KIEE Conference
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    • 1987.07a
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    • pp.429-432
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    • 1987
  • A new LOCOS (Local Oxidation of Silicon) process using a thin nitride film directly deposited on the silicon substrate by LPCVD has been developed in order to reduce the bird's beak length. SEM studies showed that nitride thickness of 50nm can decrease the bird's beak length down to 0.2um with 450nm field oxide. No crystalline defects are observed around the bird's beak after the Wright etch. A 30% improvement in current density was obtained when this new method was applied to MOS transistors (W/L*2.9/20.4) compared to conventional LOCOS process (bird's beak length=0.7um). Other various electrical parameters improved by this new simple LOCOS process are reported in this paper.

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A Study on the Publication and the Adaptation of the Literature of Korean Residents in Japan in North Korea: Focussing on Kim Dal Su and Yi Ŭn Jik (북한에서의 재일조선인 문학 출판과 개작에 관한 연구 - 김달수와 이은직의 경우를 중심으로 -)

  • 조은애
    • 한국학연구
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    • no.54
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    • pp.299-342
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    • 2019
  • 本稿は在日朝鮮人文学の「祖国」における文化翻訳という観点から, その空 間を「戦後日本」から「分断祖国」へ拡張するプロジェクトの一環として, 北朝 鮮の出版․印刷システムによって在日朝鮮人文学が日本の境界を越える過程 に注目しながら, 「公民文学」の意味を分析する.1965年ピョンヤンで発行さ れた『祖国の光の下には, 北朝鮮最初の「在日朝鮮人小説集」で, 林炅相, 朴 元俊, 李殷直, 金在南, その他の作家たちの朝鮮語作品が再収録された.その 際, 金達寿の「夜きたサナイ」だけは日本語短編小説「夜きた男」の朝鮮語翻訳 で収録された.南朝鮮から密航してきた男が, 4․19をきっかけに逆密航する という設定は, 南朝鮮単独の革命を容認する方向に変化した, 北朝鮮の対南 政策ドライブを補うものだった.このような政治的補充は, 翻訳と日本語の コンテクストの積極的な省略を必要とした. 一方, 『祖国の光の下にの出版以降, 数度も北朝鮮で紹介された李殷直 は, 1984年には個人小説集『任務をピョンヤンで発表した.2002年には未発 表の長編小説『ある同胞商工人の物語を北朝鮮で出版するようになったが, 彼はあるインタビューの中で, 「今もなお北朝鮮の在外公民なのか」という質 問に対して, 北朝鮮での出版過程で行われた検閲と介入について暗示した. 南朝鮮の人民たちの革命的覚醒と成長の過程を描き出すことに成功した作品 として扱われた「生活の中で」は, 1971年ピョンヤンの文芸出版社で刊行され た「在日朝鮮作家作品集」の『日光はここにもさすに収録されるようになる. その後, 1984年, 彼の最初の個人小説集だった『任務がピョンヤンで刊行されたときには, 他の作品とともに収録された.1967年の『文学芸術版から 1971年版への改作は, 主に①南朝鮮の「先進性」を想起させる部分の削除, ② 朴正熙政府の「傀儡性」の強調, ③北朝鮮の実在性の強調, という方向で行わ れた.1984年版で注目すべき部分は, 1967年版と1971年版の中で「愛国者」と して言及された李舜臣の内容が削除されたことだ.この削除は1973年の東京 発行版から受け継いだもので, 朴政権が李舜臣を反共と国土統一の先駆者と して英雄化した事実に関わっている.ところが, その過程に含まれていた, 日 本-南朝鮮-北朝鮮を往来する空間的移動と, そして言語体系およびスタイ ルの移動がもつ複雑性は, 積極的な包摂/排除の原理によって形成された「公 民文学」の空間では, ほとんど議論されなかった.