LabVIEW를 이용한 유도전동기의 권선고장 자동진단

한동기(Dong-gi Han),송명현(Myung-hyun Song),박규남(Kyu-nam Park),이태훈(Tae-hun Lee) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7

본 논문에서는 유도전동기의 고정자권선 고장진단을 목적으로 이상적인 전동기의 전류신호와 실시간으로 운전하고 있는 전동기 전류신호를 Park’s Vector에 각각 적용시켜 Park's Vector 패턴을 만들고 패턴 피크값의 기준치와 측정치의 편차를 이용하여 오차치를 벗어날 때 고장으로 진단하는 Park's Vector 패턴의 피크값을 이용한 고정자권선의 고장진단을 시도하였다. 숙달된 작업자가 Park’s Vector패턴을 보고 고장을 분석해야 했던 방법과는 달리 패턴을 비교하지 않고도 자동으로 고장을 진단하고 정보해주는 진단 방법을 제시하였다. 실제 전류분석 및 진단을 위해 상용 프로그램인 LabVIEW를 이용하였다.

忠州市 地域特性을 反暎한 共同住宅 計劃硏究 : 충주지역 거주자의 APT 선호특성을 중심으로

朴碩鉉,朴義權,柳顯紀,尹勝照,孫泰鎭,金基洙 충주대 2003 産業科學論文集 Vol.11 No.-

The purpose of this research is to analyze the correlation of the characteristics of dwellers and residential preference in apartment housing through the case study of 340 samples in 25 housing estates which were built in Chung-ju city The contents of this research consist of two main parts. The first part is to identify characteristics of dwellers, which might have an influence on residential preference in apartment housing. The second part is to identify the main physical elements of residential preference that can be influenced by the personal characteristics. Thus, this research will contribute to the establishment of the planning methods which increase residential preference in apartment housing, while promoting the quality of residential environment in Chung-ju city.

WWW 기반의 원격교육시스템 설계 및 구현

박남숙,장기화,곽난희,이수현,우용태 國立 昌原大學校 精報通信硏究所 1998 精報通信論文集 Vol.2 No.-

The purpose of this paper is to develope a distance education that would be a courseware for a specific object, which can be available for student to learn the necessary knowledge or function, with no restriction of time or place, using WWW and Oracle DBMS. The distance education was designed in this paper consists of bulletin board, subject information, lecturing schedule, online instructions, questions and answers, submit and confirmation of reports, evaluation of lecturing, reference sites, chatting and discussion room, and data bank. The distance education coupled by WWW and database will change the educational form from one-direction to bi-direction between a teacher and the students. This can also provide a multimedia information to the students through WWW environment with convenient user interface. Those benefits made it possible to offer animated audio-visual materials and search for the information concerned through a hypertext technique. Besides, various kinds of informations were stored at database to increase an effectiveness in managing data. Since both teacher and students, are easy to add new information using the process of instruction to the database, the amount of the stored information in the distance education can be expanded effectively.

Saint-Exupery 작품의 세 개의 공간

박기태 상명대학교 인문과학연구소 1998 人文科學硏究 Vol.7 No.-

자산감액 손실 현황과 회계규정의 개선방안

박기석,이태정,현수룡 한국세무회계학회 2004 세무회계연구 Vol.14 No.-

본 연구는 우리나라 기업회계기준과 해석 등에 산재된 자산감액손실 관련 회계규정을 검토하고 상장기업의 자산감액손실의 현황과 특징을 살펴봄으로써 문제점과 해결방안을 제시하고자 하였다. 연구결과 자산감액회계는 일부 특정 기업의 재무상태와 일부 계정과목에 중대한 영향을 미치고 있으며, 자산감액손실을 계상하는 기업이 증가추세에 있는 것으로 나타났다. 그러나 현행 회계기준은 감액손실의 인식과 환입에 대하여 재법적인 내용만 담고 있을 뿐이며 실무 적용에 있어서의 구체적인 지침은 마련되어 있지 않은 것으로 나타났으며, 토론서 제16호는 현행 기업회계기준의 문제점을 상당히 개선하고 있는 것으로 보이지만 실무 적용을 위한 구체적인 지침을 제시하지 못하고 있다. 따라서, 향후 자산감액손실에 대한 회계처리기준을 정립하기 위해서는 첫째, 자산의 구분과 적용범위, 사용가치의 추정방법, 감액손실의 추정방법 등에 대한 구체적인 실무지침을 제시하여야 할 것이며, 둘째, 자산감액손실의 엄격한 인식기준과 상장기업의 감액손실 공시의 적시성을 확보, 이익관리의 수단으로 악용 가능성 방지를 위한 관련 법규 등의 개정 등이 검토되어야 할 것이다.

비용절감형 컨버터 구조를 갖는 3상-3상 PWM 정류기/인버터 시스템

박태열,김기택,이해춘 江原大學校 産業技術硏究所 1998 産業技術硏究 Vol.18 No.-

A current controlled VSI-PWM rectifier and inverter with capacitor dc link is regarded as one of the most promising structures for three-phase to three-phase to three-phase power conversion. This type of converter normally requires twelve switches for a rectifier and inverter composed of self turn-off switch such as a bi-polar transistor or IGBT with an anti-parallel diode. In this paper, a new three-phase to three-phase converter for ac motor drives is proposed. The proposed converter employs only eight switches and has the capability of delivering sinusoidal input currents with unity power factor and bidirectional power flow. This paper describes the feasibility and the operational limitations of the proposed structure. A mathematical model of the system is derived using generalized modulation theory and experimental results for steady state and dynamic behavior are presented to verify the developed model.

형질전환 제초제저항성 벼 밀양 204호의 농업적 특성

정응기,이기환,원용재,박향미,전남수,최준호,구연충,한창덕,은무영,김태산,남민희 Plant molecular biology and biotechnology research 2005 Plant molecular biology and biotechnology research Vol.2005 No.

This study was conducted to investigated the major characteristics of genetically modified rice of "Milyang 204" originated from Dongjinbyeo compared to a non-transgenic rice varieties Dongjinbyeo and Junambyeo. Basta resistant transgenic rice lines carrying bar gene produced by the Yeongnam Agricultural Research Institute were evaluated for their agronomic characters. The transgenic Japonica rice of "Milyang 204" showed inferior phenotypic traits compared to a non-transgenic rice variety Dongjinbyeo and Junambyeo. On the basis of UPOV (Union Internationale Pour la Protaection des Obtentions Vegetables) and NSMO(National Seed Management Office) the transgenic "Milyang 204" showed difference in some traits out of some agronomic traits, such as leaf color, angle of flag leaf, number of spikelets, culm length, white core and white belly compared to the nontransgenic varieties rice.

비만 여성을 대상으로 한 해조류 추출물의 국부처치와 운동 병행을 통한 지방분해 효과의 임상적 검정

서태수,이인숙,변재철,김규호,박승한,김유영,김상국,김현정,김상기,신동철,성미영,박종석,김종기,박언휘 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.3

This study was carried out to test the body fat breakdown during topical seaweed extract treatment and in combination with the aerobic exercise. Of 20 female obesity subjects, ten treated a cream types of seaweed extract(control group) and ten treated a placebo cream(placebo group). Topical treatment of each sample was designed for 4 weeks, and treated with 2 times a day about 10ml on the abdomen and the thigh, respectively. All subjects were participated aerobic dance half hour a day and four times a week. After 4 weeks of topical treatment and exercise, they were measured body fat, skinfold thickness, body circumference. Then venous blood samples were taken and analyzed blood cells, serum enzymes, and serum lipids. There were reduction of body weight, % of body fat, antebrachium, brachium, chest, waist, thigh circumference and abdomen thickness between pre and post treatment in both group. Especially, body weight and % of body fat significantly reduced in the subjects treating the seaweed extract than those treating the placebo. There were significant decrement in total cholesterol and LDL whereas increment in HDL and TBIL in the control group, but no significant difference in the placebo group. In conclusion, there were 7.6% of body fat reduction during 4 weeks of aerobic exercise and 21% of body fat reducement in combination of topical seaweed treatment and exercise, respectively. These results suggest that the topical treatment of seaweed extract should be very effective for fat breakdown. Especially, the body fat breakdown maximized in the combination with the topical seaweed extracts treatment and the aerobic exercise.

본태성 혈소판 증다증 2예

주기산,임현성,김미자,양태영,허경,김완중,박유환,정춘해 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Essential thrombocythemia is a chronic myeloproliferative disorder of unknown origin, charcterized by excessive number of morphologically and functionally abnormal platelet in peripheral blood and abnormal proliferation of megakaryocytes in bone marrow. Its main clinical manifestations are hemorrhages and thromboses. The aim of therapy is suppression of the excessive bone marrow activity, which can be achieved by radioactive phosphorus, alkylating agent, hydroxyurea and interferon. Two cases were diagnosed at our hospital which had laboratory and clinical features compatible with this disease. We have successfully treated patient with hydroxyurea and platelet antiaggregating agent.

최대운동부하후 회복기중의 심박수·산소섭취량 변화와 유산소성 운동능력과의 관계 분석

김기진,박현,전태원 師範大學 體育硏究所 1988 서울大學校 體育硏究所論集 Vol.9 No.1

For the evaluation of cardiovascular function, aerobic capacity with VO₂max and AT(anaerobic threshold)have been used as a critical parameter. Also we expect that parameter during recovery can be used as a good one. The purpose of this study was to identify the relationship between maximal or submaximal aerobic capacity and the recovery rate of them. We studied with twenty seven subjects: 7 judoists, 10 long distance runners and 10 non-athletes. They were undergone a continuous incremented treadmill test from rest to all-out. Respiratory gas of each subjects was analyzed by using an automated respiratory gas analyzer, Ergo-Oxyscreen System (Erich-Jaeger Co.). As the data of heart rate, oxygen uptake at rest and during recovery made the log linear model with time, the gradient of recovery rate was calculated by the equation of simple regression with the time as independent variable. That equation is as follows; y=A+B.e?? ? y:HR or VO₂ ? A:expected value at rest ? B:maximum increment ? c:recovery rate The results of this study was; 1. There was a significant difference as the order of long distance runners, judoists, non-athletes' HR at rest, but there was no difference in the maximal HR. 2. Long distance runners had higher level of VO₂max(84.83ml/kg) and AT(80.03%) than the other two groups. 3. In the long distance runners group, the phase of VO₂recovery showed significant correlation with the other factors. 4. In judoists group, the phase of VO₂max recovery had significant correlation -0.79(p<0.05) with the maximal HR. 5. In all subjects, significant correlation was showed between AT, HR at rest and recovery of VO₂. In brief, maximal or submaximal aerobic capacity(VO₂max, AT etc.) had no correlation with the phase of HR recovery, but significant correlation with the phase of VO₂recovery in athletes. The results indicated that the recovery rate of oxygen uptake could be a critical index for evaluating the aerobic capacity.