속도검출기가 없는 3상유도전동기의 토크제어

정연택,장성칠 明知大學校 産業技術硏究所 1993 産業技術硏究所論文集 Vol.12 No.-

The disseration presents the new strategy for controlling the torque of induction motors without speed sensors. Torque-producing current and flux-producing current are related to the active and reactive components of the input power, respectively Active and reactive power can be calculated obviously with stator voltage reference frame. Therefoer. stator voltage axis is used as reference frame, and the torgue and flux producing currents are derived from the reactions of the two input pawer components. If the d-axis flux is fixed, constant torge characteristics can be obtained without speed detection by conrolling torgue producing current. To implement the proposed control strategies, int'l 8097 BH16 bits microprocessor is used.

PFM方式 直列形 dc-dc Converter에 關한 硏究

鄭然澤,金洪喆 명지대학교 1976 明大論文集 Vol.9 No.-

This paper described the circuits of self-commutated dc-dc converter by the PFM method. The circuit is composed with a smoothing circuit and a thyristor triggered by a UJT relaxation oscillator. The result is that the output voltage of this device can be adjusted more stably by the pulse frequency of the oscillator than that of other methods.

회전접촉자 SCR 주파수 변환기에 의한 3상 유도전동기 제어에 판한 연구

정연택 명지대학교 1977 明大論文集 Vol.10 No.-

The paper attemps to make time domain analysis of a 3 phase induction mator supplied by the SCR frequency convertor with a rotating distributor. In the steady state analysis, the mathematics can be reduced to a two point baundary-value problem, a solution of which is given.

가축과 실험 동물의 생리자료(7) : 제7장 돼지 The swine

정순동,권해병,양일석,김용근 진주농과대학 1971 진주농과대학 연구논문집 Vol.- No.10

Thyristor 周波數 變換器에 의한 同期電動機 起動特性 解析

鄭然澤 명지대학교 1972 明大論文集 Vol.5 No.-

This paper presents the analysis of steady state current and out-put power of synchronous motor, and calculated example and the result of experiment in synchronous starting using thyristor frequency changer. The bridge type SCR inverter was used for thyristor frequency changer. Calculated values are verified by the result of experiments. The efficiency of motor is lower than that of sine wave because of deep wave distortion.

MBTI 성격유형에 따른 보육시설장의 지도성 유형

조성연,정정옥 한국영유아보육학회 2003 한국영유아보육학 Vol.0 No.34

The purpose of this study was to examine the general tendency of day care center(DCC) director's personality and leadership, and to determine whether personality type by MBTI affected the leadership of DCC director. Original subjects were 120 who attended in DCC director's in-service program in Chungnam province in Korea, but 26 subjects among them missed out several items. Therefore final subjects were 94 DCC directors and they answered a questionnaire(1 to 5 score, 10 items each in 3 types) about the DCC director's leadership and MBTI for personality test for themselves in a university in Chungnam province during July 19-21, 2001. Several findings were obtained. First, ISTJ(n=30) among 16 personality types by MBTI and bureaucratic orientation among 3 leadership types were frequently observed. Second, there were significant differences in bureaucratic orientation (F=2.442, p≶.01) and total leadership score(F=2.044, p≶.05) according to 16 personality types of MBTI. The most bureaucratic orientation was ESTP (M=42.86, SD=3.39) and the lowest were ENFP(M=35.00, SD=1.41) and ISFJ (M=35.00, SD=2.83). In total leadership score, the highest score was ESTP(M=112.71, SD=7.27) and the lowest was ISFP(M=98.29, SD=8.56). Third, there were significant differences in humanistic orientation(F=11.885, p≶.001), bureaucratic orientation(F=11.297, p≶.001), and total leadership score(F=13.962, p≶.0001) according to thinking-feeling preference in 4 MBTI preferences. These findings suggested that DCC director's leadership is different from their personality types.

X.509 프로토콜을 적용한 Kerberos 인증 메카니즘의 설계

배용근,정일용 조선대학교 전자정보통신연구소 2000 電子情報通信硏究所論文誌 Vol.3 No.1

본 논문에서는 X.509와 DNS를 연관하여 새로운 Kerberos 인증 메카니즘을 제안한다. Kerberos에서는 영역간의 서비스에 대하여 언급을 하지 않았기 때문에 영역간 인증은 X.509와 Domain Name System(DNS)를 사용하여 얻을 수 있는 체인에 의해서 수행하는 PKINIT를 통하여 이루어진다. 두 개의 프로토콜은 상이한 키관리 방식을 갖고 있는데 Kerberos는 공동키에 기반을 두고 있는 반면에 X.509는 공개키 방식에 기반을 두고 있으므로 이들을 상호 연동시키기 위해 연결 섹션은 Directory Service(DS)를 이용하였고, 실제적인 인증을 위해서는 Kerberos를 적용하였다. 새로운 프로토콜은 통신복잡도의 관점에서 고찰하면 IETF CAT Working Group에서 제안한 인증 메커니즘보다 개선하였다. In this paper, a new kerberos authentication mechanism associated with X.509 and Domain Name system(DNS) is presented Since any suggestion to regional services are not described in kerberos, authentication between regions is performed via PKINIT, which can be accomplished by the connected chain obtained from X 509 and DNS. These two protocols have distinguished key managment systems X 509 is designed using an asymmetric method, while Kerberos using a symmetric method In order to provide regional services, Directory Service(DS) is employed on connection part and Kerberos on actual authentication part The new protocol is better than the authentication mechanism proposed by IETF CAT Working group in terms of communication complexity

俗離山 法住寺의 夏季觀光客 分析

박정연 청주대학교 사회(지리)교육학과 1975 上黨地理 Vol.- No.4

Syn the sizing the whole situation of the above mentioned attributes and features of sightseeing, several patterns of the tourist resort are to be established from the angle of the sightseers. Four main patterns, such as mountain type, the age of twenties centered type July type, bus-using type, are extracted. And, 16 minor patterns, such as (1) Tourist resources legal-type (2) Scenery-appreciation and rest type (3) Student and wage-earner-centered type (4) Higher education-type (5) Dependence on cities-type (6) Middle level-type (7) The main is spring, fall and a second-degree summer -type (8) Weekdays- type (9) Weekdays and summer vacation-type (10) friend or family accompany or workshop colleague - type (11) A day trip or camping and inn-type (12) Two days' staying-type (13) once or twice visit-type (14) one"s own expense-type (15) middle level of consumption-type (16) nature scenery and traffic convenience, are extracted.

보육시설장의 지도성과 이고그램에 의한 성격유형과의 관계

조성연,정정옥 한국영유아보육학회 2004 한국영유아보육학 Vol.0 No.38

본 연구는 보육시설장의 전반적인 지도성 유형과 성격유형을 살펴보고 이들의 성격유 형이 지도성에 영향을 미치는지에 대해 조사해보고자 하는데 목적이 있다. 이를 위해 충남 지역의 보육시설장 90명을 대상으로 보육시설장의 지도성과 이고그램에 대한 질문지를 실시하여 결과를 분석하였다. 산출된 결과는 첫째, 보육시설장의 이고그램에 의한 전반적인 성격유형은 성인자아상태가, 지도성 유형은 관료지향성이 가장 많았다. 둘째, 성격유형에 따라 보육시설장의 지도성에 차이가 있었다. 즉 인간지향성의 지도성을 지닌 시설장은 성인자아상태 점수가 높았고, 관료지향성의 지도성을 지닌 시설장은 순응된 어린이자아상태 점수가 높았다. 셋째, 비판적 부모자아상태와 성인자아상태와 지도성유형 간에 의의 있는 정적 상관관계가 나타났다. 넷째, 보육시설장의 지도성에 대해 성격유형 중 성인자아상태와 비판적 부모자아상태의 설명력이 높았다. The purpose of this study was to examine the general tendency of day care center(DCC) director's personality and leadership, and to determine whether personality type by egogram affected the leadership of DCC director. Original subjects were 117 who attended in DCC director's in-service program in Chungnam province in Korea, but 27 subjects among them missed out several items. Therefore final subjects were 90 DCC directors and they answered a questionnaire(1 to 5 score, 10 items each in 3 types) about the DCC director's leadership and egogram for personality test for themselves in a university in Chungnam province during Aug. 12-14, 2002. The collected data were analyzed by Pearson's correlation, oneway ANOVA and post hoc test(Scheffe test) and stepwise multiple regression by SPSS PC program(10.0 version). Results are as follows; first, DCC directors' representative personality type was Adult ego state(A) and their leadershiop type was bureaucratic orientation. Second, there were significant differences in humanistic orientation and bureaucratic orientation by representative personality types. Third, there were significant correlations in DCC leadership with Critical ego state(CP) and Adult ego state(A). Finally, related variables with DCC directors explained their leaderships about 32~44%. These findings suggested that DCC director's leadership is different from their personality types.

무선 환경에서 XML 데이터 스트리밍 서비스를 위한 시뮬레이션 시스템의 설계 및 구현

박정현,정연돈 東國大學敎 産業技術硏究院 2005 산업기술논문집 Vol.15 No.1

데이터 교환을 위한 표준으로 자리 잡은 XML은 데이터를 효과적이고 조직적으로 표현 가능하다. 이런 이유로 XML을 이용하면 효율적인 스트리밍 서비스가 가능하다. 본 논문에서는 무선 환경에서 XML 데이터를 이용해서 방송하는 스트림을 생성하는 시뮬레이션 시스템을 설계하고 구현한다. 구현한 시스템은 서버와 클라이언트 모듈로 구성되는데 서버 모듈은 XML 데이터로부터 구현된 색인기법을 적용해서 스트림을 생성한 후에 클라이언트에 스트림을 방송하는 역할을 하고 클라이언트는 방송되고 있는 스트림에 대해 XPath 형식의 질의를 수행하는 역할을 한다. 질의 수행의 결과로 XML 데이터가 얻어지고 성능 평가요소로 질의수행에 대한 접근시간 및 튜닝시간의 측정이 가능하다. XML is standard for data exchange. It is efficiently expresses data in an organized way. In this paper, we design and implement a Simulation System for XML stream services. The implemented System is composed of a server and a client. The server generates XML stream by using indexing methods and broadcasts XML stream to clients. The client evaluates Xpath query on the broadcasting XML stream. As a result of query, XML data is generated, and the access time and tuning time for the query evaluation are measured.