부가가치통신망의 활용방안에 관한 연구

양천석,김갑식 대구산업정보대학 1995 논문집 Vol.9 No.2

The evolution of computer has seen the biggest turning point in the history of modern management. With the development of computer and other information technology, firms have been able to manage uncertainty to a certain extent, since decision makers have been able to consider many more contingent variables and obtain more effective and accurate information in more efficient ways. This isespecially true for network technology including VAN, LAN, WAN, MAN in today's more globalized and complicated business environment. Many firms put their efforts to figure out the possibility of increaing effectiveness of decision making and efficiency of daily operations by introducing network technologies. Some firms report successful experiences while the others are not. The level of success mostly determined by if they establish effective ways to utilize various network technoligies or not. This study has been done to propose ways for the effective usage of VAN. (1) The reliability of information from VAN must be fully guaranteed. (2) A VAN should be compatible and integrated with different VANs. (3) A VAN should be able to access and process various information media such as audio information, video information and text information. (4) A satisfactory after-service system is required. (5) Relevant regulations, guidelines and policies should be prepared and implemented effectively. (6) Set up a long-range plans for the training and eduction of VAN experts.

인쇄체 한글의 자소 인식에 관한 연구

楊天錫,徐聖煥,河錦淑 대구산업정보대학 1993 논문집 Vol.7 No.-

In this paper, Preprocessing(Thinning) Printed Korean Character was studied Algorithm in terms of the Blocking Masking and Decision step by effective Recognition. The results were as follow ; The Recognition Rates were 98 Percents. And Average Recognition Time were 0.42 seconds. Then the Recognition Rates was obtained a high compression Error by the Preprocessing. The effective Mesh Vector Method Required for study.

受講 및 成積管理 情報시스템의 效率的인 構築에 關한 考察

楊天錫,金甲植 대구산업정보대학 1993 논문집 Vol.7 No.-

Because of the need for effective management of academic affairs the University has been urged to advance in its educational administration, its curriculum, and its improvment of teaching methods. In order to apply the improvements produced by constant research to the school administration, first of all, we have to have the establishment of a reliable information system, effective management of information for academic evalution and analysis, and speedy management processing. However, the explosive increase of information followed by the increase of an educated populace has brought us many additional problems to be taken care of. Especially, personnel management is decisively limited by each school's financial difficulties. Plans for an effective academic management information system are urgently needed to help solving problems which occur when we reduce school personner in order to manage academic affairs effectively, and control academic information efficiently. This thesis is made in this regard. Stated in more detail, we took D Junior College. We have mainly analyzed the ins and outs of the system for academic achievement and registration forms for classes which we think the most important in academic affairs. We have also found some problems as well as inconveniences. We have tried to make improvements developed by our research applicable to this junior college. We couldn't solve all the problems related to registration for classes and academic achievement. It's mainly because we didn't have enough time to take care of such problems and because the minicomputer we have could not take care of all the information related to our research. Anyway, we sincerely hope that this thesis will be a small milestone on the endless road of improving academic convenience. We also hope that this thesis would help to establish a more effective and comprehensive program for the total system.

지역정보화 촉진을 위한 대구·경북지역 정보산업의 활성화 방안 : 소프트웨어 산업 중심으로 Case in Software Industry

楊天錫,金甲植 대구산업정보대학 1996 논문집 Vol.10 No.2

It is necessary to introduce an effective Stratagy for the Success of regional balanced-development. Recently, regional Informationization attracts high attention as one of the most effective strategies for regional balanced-development. One can presume that there are many other alternatives to propel the regional Informationization effectively. However, the activation of Software industry which is an indispensable condition to build up infonnation system for all sorts of Informationization such as administrative Infonmationization, social Infonmationization, Industry Informationization and regional Infonmationization etc, is the most fundamental alternative to promote the regional Informationization. Among the above, the activation of regional software industry should be a shortcut to reach the successful regional Informationization. This study was designed to plan the activation of regional software industry, connected with above mentioned circumstances.

偏自己 相關法을 利用한 韓國語 音聲 合成

楊天錫 대구산업정보대학 1988 논문집 Vol.2 No.-

In this paper, speech synthesis was not worked in terms of the magnetic tape and mechanical method but worked in terms of speech synthesis system used by special Partial Autocorrelation Method among the several methods for the purpose of the reconstruction of high-quality sounds. In experimental method six voiced sounds and syllables were selected, and these sounds were analyzed by compuer. In the experimental result, synthesis sound was almost obtained the same that as the original sound. Informations per a frame were reduced by 136 bits. Then, it was obtained a high compression effect from these informations.

고주파로 스펏터링한 Al₂O₃ 박막 유전 특성

楊天錫,朴鐘喆 대구산업정보대학 1994 논문집 Vol.8 No.-

Mo-Al₂O₃-Al thin film capacitors have been fabricated. Al₂O₃ thin films were deposited by r. f. sputtering method. Their dielectric constant and disipation factor have been measured as a function of percentage of O₂ and deposition rate. The annealing effect of deposited films were investigated. The structure and etched surface of thin films were investigated by I. R. absorption measurement and a microscope, respectively. The relations of dielectric constant and pin hole of deposited films were investigated.

복수 제품 켄테이너 수송 차량 대수 결정

양천석,김갑식,이창순 경산대학교 기초과학연구소 2001 基礎科學 Vol.5 No.2

컨테이너 차량이 공로를 통해 이동하는 경우 교통 혼잡 정도에 따라 이동시간이 불규칙적으로 소요되며, 또한 컨테이너 터미널이나 ODCY 등에서의 작업진행 상황에 따라 상하차 작업시간이 불확실하게 발생한다. 따라서, 본 연구에서는 컨테이너 셔틀운송을 대상으로 주어진 작업 물량을 처리하기 위해 필요한 최소 차량 대수를 찾아내기 위한 접근법을 제시한다. 차량이동시간 및 작업시간을 나타내는 확률변수의 평균치를 기준으로 하여 차량대수를 최소로 하는 수리적 모형 구축과 탐색적 알고리즘을 제안한다. 또한 컨테이너 운송 시뮬레이션 모형을 활용하여 추계적 작업환경에서 개발 알고리듬의 타당성을 입증한다.

SVM를 적용한 매트릭스 컨버터의 설계 및 구현

양천석,윤인식,김경서 전력전자학회 2005 전력전자학회 논문지 Vol.10 No.6

The matrix converter provides sinusoidal input and output wave forms, bidirectional power flow, controllable input power factor and a long life, compared to the VSI(Voltage Source Inverter) with diode rectification stage at the input. However it has tasks, such as complexity of the control method, ride-through problem and low voltage-ratio limitation, to overcome for commercializing, This paper describes the design, construction and implementation of matrix converter based on space vector modulation technique. The implemented prototype of matrix converter is built using the exclusive IGBT module and control circuit constituted with DSP and CPLD and it has an input filter, overvoltage protection circuit and commutation means for overcoming practical issues. The good results tested using an induction motor are also presented. 매트릭스 컨버터는 VSI에 비하여 장수명, 입력역률 직접제어 및 에너지 회생 등의 장점을 갖고 있으나, 제어의 복잡성, ride-through 대책 및 낮은 전압이용률 등은 상용화를 위해 해결해야 할 난제이다. 본 논문에서는 SVM를 적용한 매트릭스 컨버터의 설계 및 구현방법을 제안한다. 입력 고조파를 저감시키기 위한 입력필터와 입출력의 과전압 방지와 free-wheeling을 위한 클램프 회로의 설계기법을 제시하고, 고속 DSP와 CPLD를 사용하여 공간벡터 제어 및 4 단계 전류(commutation) 제어를 구현하며, 매트릭스 컨버터의 양방향 스위치 구동을 위한 전용의 전원회로를 설계하여, 최적 구조의 전력회로를 제안한다. 그리고 구현된 매트릭스 컨버터를 유도전동기에 적용하여 성공적인 운전 결과를 얻을 수 있었다.

效率的인 保險經營情報시스템 構築에 관한 小考 : 생명보험회사를 중심으로

양천석,김갑식,김건우 한국산업경제학회 1993 산업경제연구 Vol.6 No.1

음소에 의한 한국어 음성 신호 처리에 관한 연구

김영일,양천석 慶尙大學校生産技術硏究所 1988 生産技術硏究所論文集 Vol.4 No.-

According to the characteristic and structure of its pronunciation, Korean syllables can be devided into the phoneme such as consonant, vowel and end-consonant. The divided phonemes are analyzed by using the method of partial autocorrelation. In analysis, it shown that each characteristic of same phonemes in syllables is similar. The experiment is carried out by dividing 675 syllables into the phonemes, the recognition rate of consonants, vowels, end-consonants and syllables are 85.0(%), 90.7(%), 85.8(%) and 72.1(%) respectively. It is shown that Korean syllables, words and sentences are recognized in the same way with minimum data and short processing time.