죠인 노드를 이용한 발견적 타스크 스케쥴링 알고리즘

안광선,박세명 경북대학교 산업기술연구소 1989 産業技術硏究誌 Vol.17 No.-

Task schedulduling algorithm is very important in the application of Distributed Computing System and Multiprocessor System because it determines the execution time of task graph. In this paper, we propose new heuristic task scheduling algorithm based on join-node, and compare the performance of proposed algorithm with the previous work using critical path.

마이크로 콤퓨터를 利用한 電信信號의 自動飜譯

安光善 경북대학교 공과대학 1978 工大硏究誌 Vol.7 No.-

This paper deals with random telegraphy signal analysis and processing by use of μ-processor Intel 8085. In this experiment, input data was made by electric key and output data was stored in output buffer area as ASCII code for listing by TTY.

Lithium Niobate(LiNbO₃) 단결정의 경도에 관한 연구

진광수,김창선,장민수 부산대학교 물성연구소 1984 물성연구소연구논문집 Vol.3 No.-

순수한 LiNbO3 단결정과 불순물 (Ti,Fe,Cr)을 첨가한 단결정의 X, Y, Z-면에 따른 경도를 Vickers 경도계로서 측정하였다. 본 실험에서 측정한, 순수한 이단결정의 Vickers 경도값 588.87 Kgf-mm^(-)²은, mohs경도치로 환산하면 5.5이다. 이 값은 Mohs 경도치 (H)와 bond-ionicity(α)와의 관계식 H=K(1-⅔α⁴)에 의한 계산치 5.3에 아주 가깝다. 또한 측정한 경도값들을 보면, 불순물을 첨가한 것이 순수한 것보다 그 값이 더 컸으며, 불순물 첨가에 관계없이 Z-positive, Y-positive, X, Z-negative, Y-negative면의 순으로 그 경도 값이 작아졌다. The hardness of LiNbO₃single crystal has been studied both theoretically and experimentally. Theoretical approach to the hardness of LiNbO₃ single crystal constitutes the application of an empirical relation,H=K(1-⅔α⁴)derived between the smoothed Mohs hardness value H and the bondionicity α. The calculated H-scale of LiNbO₃is theoretically 5.3 The experimental methods consist of micro Vicker hardness measurement and the chemical etching. The hardness measurements are made on x, y, and z-planes of pure and transition elements(Ti, Fe, and Cr) doped LiNbO₃single crystals. The average indentation hardness value of LiNbO₃single crystals is 588.87 kgf.mm^(-)². The chemical etching method is utilized to trace the relationship between etching rate and hardness on x, y, and z-planes of LiNbO₃single crystal.

마이크로프로세서 機能試驗을 위한 試驗命令語

安光善,金鍾勳 경북대학교 공과대학 1983 工大硏究誌 Vol.12 No.-

This paper deals with the selection of minimal test instruction set for Z-80 microprocessor. This test method is based on a function description of the instructions which are obtained from the data given by the user's manual. Selecting the minimal test instruction set is done in 2 steps: 1) a test execution graph is represented on all instructions, 2) a dominant class and dominant subclass are selected from the test execution graph.

Al 단결정육성 과정에 나타난 질량비와 강도에 관한 연구

진광수,황선주 부산대학교 1986 자연과학논문집 Vol.41 No.-

The multipass zone refining and the Bridgman technique were applied in the single crystal growing of aluminium. The optimum conditions can be summarized as follows; the temperature (760℃), the soaking time (4 hours), the pulling velocity (3~4cm/hr), and the pulling time (4 times). The hardness of the crystals were also studied. Especially the zinc doped aluminium single crystals showed a various hardness according to the impurty doping rate.

Gas Chromatography에 依한 微量의 一酸化炭素및 炭酸개스의 分析에 關하여

朴光潤,朴英宣 忠州大學校 1974 한국교통대학교 논문집 Vol.7 No.-

Many studies have been reported for the microanalysis of carbon monoxide and carbon dioxide. The analytif method, however, are not so practically enough to apply for the determination. Gas chromatographic method combining the separating column and hydrogenating column with FID was found effective in determining micro carbon monoxide and carbon dioxide at 300℃.

高速 Fourier 變煥 應用에 관한 硏究

박충기,안광선,車日煥 연세대학교 산업기술연구소 1977 논문집 Vol.7 No.1

. Fourier transformation is used to analyze a time varying signal in the frequency domain. Due to recent progresses of computer technology, it has been possible to study multitude of time dependet input data effectively and in a relatively short time. The fast Fourier transform (FFT) has been developed for the effective use of computers in dealing with Fourier transform. An elementary theory and general properties of FFT beginning with the Fourier series is presented. It is also shown how to avoid some pit-falls arising in the usage of the FFT. A computer program of FFT for general purpose is developed. As an example of a practical application of this program, the power spectrum of six fundamental vowels of Korean language is resolved.

D-Amphetamine이 니코틴성 흥분작용에 의한 카테콜아민 분비작용에 미치는 영향

임건한,서유석,민선영,임지연,김용직,나광문,임동윤 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.1

본 연구의 목적은 d-arphetamine이 흰쥐의 적출부신 관류모델에서 니코틴 수용체 흥분에 의한 카테콜아민(CA) 유리작용에 미치는 영향을 검색하여 그 작용기전을 규명하고자 하였다. D-amphetamine은 흰쥐 부신정맥내로 60분간 관류시 d-amphetamine자체는 약한 CA 분비작용을 나타내었으나, d-amphetamine (30 μM)을 비롯한 강력한 neuronal nicotine 수용체 작용제인 cytisine (50 μM) 및 epibatidine (30 μM)에 의한 CA 유리작용을 처음 4-10분 동안만 유의하게 증강시켰다. 또한, d-amphetamine (30 μM)은 60분간 부신정맥 내로 관류한 상태에서 dihydropyridine L-형 칼슘통로 개방약물인 Bay-K-8644 (10 μM)과 세포질내 칼슘저장고에서 Ca^(2+) ATPase 억제제인 cyclopiazonic acid (10 μM)의 CA 유리작용을 처음 4분간만 유의하게 증강시켰다. 그러나, 고농도의 d-amphetamine (500 μM)은 상기한 모든 분비촉진제의 CA분비작용을 오히려 억제하였다. 이와 같은 연구결과로 보면, 흰쥐 관류 부신수질에서 d-amphetamine은 낮은 농도에서는 콜린성 니코틴 수용체 흥분에 의한 카테콜아민 분비반응을 증강시키지만, 고농도에서는 오히려 억제적으로 작용함을 시사한다. 따라서, d-amphetamine은 용량에 따라서 흰쥐 적출 관류부신수질의 니코틴 수용체의 작용제 및 길항제로 이중 작용(dual action)을 나타내는 것으로 생각된다. 이러한 d-amphetamine의 작용은 흰쥐 부신수질 크롬친화세포의 dihydropyridine계 L-형 칼슘통로의 활성화 및 세포 내 칼슘저장고로부터 칼슘유리작용과 관련성이 있는 것으로 사료된다. The purpose of the present study was to examine the effect of d-amphetamine on CA release evoked by nocotinic receptor stimulation from the isolated perfused model of the rat adrenal gland, and to establish its mechanism of action. D-amphetamine(30 μM), when perfused into an adrenal vein of the rat adrenal gland for 60 min, enhanced the CA secretory responses evoked by ACh (5.32 mM), nicotine (30 μM), cytisine (50 μM, a selective neuronal nicotinic Nn-receptor agonist) and epibatidine (30 nM, a selective neuronal nicotinic Nn receptor agonist) only for the first period (4~10 min), although it alone has weak effect on CA secretion. Moreover, d-amphetamine (30 μM) in to an adrenal vein for 60 min also augmented the CA release evoked by BAY-K-8644, an activator of the dihydropyridine L-type Ca^(2+) channels, and cyclopiazonic acid, an inhibitor of cytoplasmic Ca^(2+) ATPase only for the first peroid (4 min). However, in the presence rather inhibited the CA secretory responses evoked by the above all of secretagogues. Taken together, these experimental results suggest that d-amphetamine at a low concentration enhances the CA secretion from the rat adrenal medulla evoked by stimulation of cholinergic nicotininc receptors, but at a high concentration it rather inhibits them. It semms that d-amphetamine has dual action acting as both agonist and antagonist at nicotinic receptors of the isolated perfused rat adrenal medulla, which are might be dependent on the concentration. It is also thought that these actions of d-amphetamine are probably relevant to the activation of the dihydropyridine L-type Ca^(2+) channels located on the rat adrenomedullary chromaffin cell membrane and release of Ca^(2+) from the cytoplasmic store.

경계면-스캔 구조에서 SRAM의 BIST설계

全粉愛,朴惠鯨,安光善 경북대학교 산업기술연구소 1993 産業技術硏究誌 Vol.21 No.-

In this paper, a SRAM for BIST with Boundary-SCAN Achitecture is designed, and simulated. The designed SRAM consists of Address Generator, Pseudo-Random Pattern Generator, Parallel Signature Analysor, TAP controller, Instruction Register, BYPASS Register. The simulation is satisfied with BYPASS, SAMPLE/PRELOAD, RUNBIST instructions.

보험계약자의 위험에 관한 고찰

김선광 ( Seon Gwang Kim ) 한국법정책학회 2006 법과 정책연구 Vol.6 No.1