고기능 전력변환 이중데드비트 전류 제어기

이진섭,정해덕,백형래 조선대학교 에너지.자원신기술연구소 2000 에너지·자원신기술연구소 논문지 Vol.22 No.1

This paper describes a new digital control system based on the model state equations and a prediction method of the load current for PLW inverter with DC link. A new technique used dead beat theory to obtain a sinusoidal PWM inverter output voltage with LC filter has been presented. The dead schemes possess one sample delay in theses controlled signal which can compensate by prediction of the reference wave of the load current at next sample time. Load current prediction which has quick response is applied to compensate the random and high frequency components. This proposed control inherently is verified vary good sinusoidal output wave synthesis of voltage and current, providing accurate phase positioning for various load and excellent transient response. The experimental implementation of the system uses a real time TMS320C31 DSP(Digita1 Signal Processor)based digital controller.

IGBT PWM 컨버터 시스템의 제어 특성에 관한 연구

이진섭,백형래 조선대학교 에너지.자원신기술연구소 1999 에너지·자원신기술연구소 논문지 Vol.21 No.1

The problem of power factor and harmonics are occurred in converter system which used to SCRs and diodes a s power semiconductor devices. IGBT power device with self-commutation type was solved that problem, maintain the input line current with sinusoidal wave current of input power source voltage. It was estimated that improvement of transient state characteristics with feedforward compensator, added in the diode rectifier with single phase voltage type inverter was used to load. As a result it was verified that the transient state characteristics with voltage type PWM converter control was improved by simulation.

연속공정시스템의 고속 고정도 장력제어시스템

이진섭,백형래,이상일 조선대학교 에너지.자원신기술연구소 2001 에너지·자원신기술연구소 논문지 Vol.23 No.1

This paper deals with the tension control of state feedback control for continuous processing line. At the starting point of entry section, for example, a unwinder named pay off reel unwinds the material maintaining constant tension and line speed. Speed and torque characteristics state is variance during acceleration and deceleration period. In simulation roll diameter variation and inertia variation are considered. It becomes clear that the proposed tension control system has high accuracy performance.

공황장애 환자의 성격요인과 방어기제의 특성에 관한 연구

심진현,백상빈,신영철,오강섭,노경선,이시형 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.6

연구목적: 본 연구는 공황장애 환자들을 대상으로 성격요인과 방어기제 검사를 실시하였으며 우울 및 사회기능 정도를 측정하여 상관관계를 알아보았다. 방 법: 1997년 9월부터 1998년 8월까지 환자들중 공황장애로 진단된 35명을 대상으로 성격요인검사(Sixteen Personality Questionnaire 한국판) 및 방어기제검사(이화방어기제검사)를 시행하여 스텐점수(1-10)화 하였고, 우울증척도(Beck Depressive Inventory 한국판) 및 사회기능장애척도(Sheehan Disability 한국판)를 시행하였다. 결 과: 1) 개별항목 (1) 성격요인과 방어기제의 척도별 평균점수에서 정상보다 높거나(8점이상) 낮은(3점이하) 척도는 없었다. (2) 성격요인중 불안감이 높았고 자아강도, 신중성, 사변성은 낮은 점수를 보였다. (3) 방어기제중 신체화, 행동화의 점수가 높았고 유우머, 억제, 이타주의, 회피, 합리화는 낮은 점수를 보였다. (4) BDI의 평균점수는 18.25±9.97이었다. (5) SDS의 평균점수는 업무항목 4.88±3.11. 사회활동/오락활동항목 4.57±2.92였다. 2) 상관관계 (1) 성별간 비교에서 성격요인은 사변성, 죄책감을 방어기제는 허세, 부정, 수동공격, 투사를 남성 이 높게 보였다(p<0.05). (2) 연령증가는 성격요인중 낮은지능과 방어기제는 예견, 해리와 상관을 허세와 역상관을 보였다(p<0.05). (3) BDI 점수는 성격요인중 지능도, 자아강도, 도덕성, 죄책감, 통제력, 불안감등과 방어기 제중 해리, 신체화등과 유의미한 상관관계를 나타냈다(p<0.05). (4) 사회기능장애척도의 업무항목은 성격요인중 죄책감, 진보성, 불안감, 도덕성과 방어기제의 신 체화, 투사등과 유의미한 상관이 있었고, 사회/오락활동항목은 성격요인의 죄책감, 불안감과 방어기제중 허세, 투사 등과 유의미한 상관관계가 있는 것으로 나타났다(p<0.05). 3) BDI와 사회기능장애척도의 업무항목간에는 유의미한 상관관계가 있는 것으로 나타났다(p<0.05). 결 론: 공황장애 환자는 성격요인검사상 불안감이 높고 자아강도, 신중성, 사변성은 낮게 나타 났으며, 신체화 등의 신경증적 방어기제를 주로 사용하는 반면 유우머, 억제, 이타주의, 회피, 합리화의 방어기제는 적게 사용하는 것으로 나타났다. 증상의 강도와 관련이 있는 우울증상은 업무활동에 영향을 미쳐 이와 관련된 중등도의 사회기능의 장애를 초래하고 있는 것으로 보인다. Objectives : The purpose of this study was to evaluate the characteristics of personality factor and defense mechanism and relationship with depression and disability. Methods : Study subjects consisted of 35 panic disorder patients diagnosed with the criteria of DSM-Ⅳ. Data were collected through Sixteen Personality Factor Questionnaire, Ehwa Diagnostic Test of Defense Mechanism, Beck Depression Inventory and Sheehan Disability Scale. Statistics employed for the analyses were Pearson correlation and independent sample t-test. Results : In personality factors and defense mechanisms, there were no definitely abnormal range of scores. But, among personality factors, tension/anxiety factor scored high and unstableness/stableness, shyness/boldness and praxernia/atunia were in low range of score. In defense mechanism, somatization and acting-out scored high and humor, suppression, altruism, avoidance and rationalization scored low. The mean BDI score was 18.25±9.97. The mean score of SDS were 4.88±3.11 in work category and 4.57±2.92 in social/leasure category. Male patients were significantly correlated with guit-proneness and atuia in personality factor and passive-aggressiveness, projection, denial and show-off in defense mechanism, compared with female patients(p<0.05). The patients` age was correlated with low intelligence in persolity factor and dissociation and anticipation in defense mechanism. It was negatively correlated with show-off(p<0.05). The BDI score was correlated with low intelligence, superego, unstableness, self-conflict, high superego and atunia in personality factor and dissociation and somatization in defense mechanism(p<0.05). There was a significant relationship between BDI score and SDS work category(p<0.05). Conclusions: Panic disorder patients show high score of tension/anxiety factor and they frequently use neurotic defense style like somatization. The depressive symptom, which depends on symptom severity, appears to have influence on work category and to cause social disability.

재래종 콩 유전자원의 주요 형태적 특성과 변이

윤문섭,백형진,이정란,김행훈,조양희,안종웅,김창영 한국국제농업개발학회 2003 韓國國際農業開發學會誌 Vol.15 No.4

본 실험은 한국, 중국 및 일본 재래종 콩 유전자 자원의 주요형질 변이를 조사하고 이들 자원간의 지리적 유연관계를 비교하고자 수행하였으며, 그 결과를 요약하면 다음과 같다. 1. 경장은 한국(66㎝)이나 일본자원(54.9㎝)보다 중국자원(71㎝)에서 더 컸으며, 또한 변이도 중국자원에서 가장 큰 것으로 나타났다. 2. 개화일수 및 생육일수는 한국자원(65.5일, 151.4일)이 가장 길었으며 중국(57일, 120일)과 일본자원(59.9일, 122.4일)은 같은 경향을 나타냈다. 또한 한국과 중국자원은 지역에 따른 차이를 나타냈으나 일본자원에서는 확인할 수 없었다. 3. 백립중은 한국(18.8g), 일본(17.2g) 및 중국(14.7g) 순으로 무거웠다. 특히 한국자원은 9~11g과 23~25g에서 정점을 나타냈고, 변이폭도 가장 컸다. 반면 일본과 중국자원은 13~17g사이에서 정점을 나타냈다. 4. 협수는 중국(46.9개)이나 일본자원(36.5개)보다 한국자원(75.5개)에서 가장 많았으며, 변이폭도 한국자원에서 가장 컸다. 내도복성은 일본자원에서 가장 강하였다. 5. 정준판별분석결과 can 1을 경계로 하여 오른쪽 상하에 한국재래종이 주로 분포하였고 왼쪽에는 중국과 일본 재래종이 주로 분포하여 각 나라별로 고유한 영역을 가지고 분리되었다. 전체적 경향이 중국과 일본자원이 한국자원보다 가까운 경향을 나타냈다. This experiment was carried out to compare the characters of 944 Korean soybean landraces, 716 Chinese, and 170 Japanese soybean landraces introduced from USDA soybean germplasm collection. Cannonical discriminant and cluster analyses were conducted by their origins. The population from China was taller in plant height than those from Korea and Japan, also its variation was largest in Chinese population. The population from Korea was langer than those from China and Japan in terms of days to flowering and maturity. Also, Korean and Chinese accessions appeared the difference of those traits according to latitude. One hundred seeds weight was in the order of Korean(18.8g), Japanese(17.2g) and Chinese populations(14.7g), especially Korean population was distinguished into two groups; the group including accessions between 10 and 15g, and the other group including accessions between 20 and 25g. However, others showed the peak in range of 13~17g. The number of pod per plant was more in Korean accession(75.5) with the largest variation than Chinese(46.9) and Japanese accession(36.5). The distribution of Korean, Chinese and Japanese accessions reflected the origin of accessions analyzed by cannonical discriminant analysis. The relationship between their geographical origins showed the population of China and Japan are losely related.

유전체의 과도 산란 해석을 위한 시간영역 결합 적분방정식

박재권,김형진,윤희상,정백호 湖西大學校工業技術硏究所 2003 工業技術硏究所論文集 Vol.22 No.-

In this paper, we propose a time domain combined field integral equation (TD-CFIE) formulation to analyze the transient electromagnetic response from three-dimensional dielectric objects. The solution method in this paper is based on the method of moments(MoM) that involves separate spatial and temporal testing procedures. A set of the RWG(Rao, Wilton, Glisson) functions is used for spatial expansion of the equivalent electric and magnetic current densities and a combination of RWG and its orthogonal component is used as spatial testing. We also investigate spatial testing procedures for the TD-CFIE to select the proper testing functions that are derived from the Laguerre polynomials. These basis functions are also used for temporal testing. Numerical results computed by the proposed formulation are presented and compared with the solutions of the frequency domain combined field integral equation(FB-CFIE).

DSM-CC U-U 적합성 시험을 위한 시험열 생성

김영규,전기환,박용,백청호,최형진 강원대학교 정보통신연구소 2006 정보통신논문지 Vol.10 No.-

In these days, as rapid growth of multimedia industries and development of techniques, an effort to develop DAVIC(Digital Audio-Visual Council) systems which support multimedia services such as VOD(Video on Demand) and teleshopping is being done. Therefore it will be indispensable to establish a new conformance testing method related DAVIC system with respect to their standard specification. DSM-CC is a core part of DAVIC and adopts DSM-CC U-N for S3 information stream which plays a part in connection establishment and release of session and transmission layer, and DSM-CC U-U for S2 which operates user application of the system. In this paper, we propose a new conformance testing architecture and methodology based on scenario in order to test DSM-CC U-U which doesn't have any message sequences.

직무스트레스와 뇌 · 심혈관계질환의 관련성

황창국,고상백,장세진,박종연,차봉석,현숙정,박준호,이강명,차경태,박우진,전형준 대한산업의학회 2007 대한직업환경의학회지 Vol.19 No.2

그래프 이론을 적용한 전역 레지스터 할당 알고리즘 고찰

전기환,김영규,박용,백청호,최형진 강원대학교 정보통신연구소 2006 정보통신논문지 Vol.10 No.-

Global Register Allocation plays a major role in determining efficacy of Optimizing Compilers. Instructions involving only register operands are shorter and faster than those involving memory operands. Therefore, efficient utilization of limited number of hardware registers is important in generation good code. Register allocator attempts to map registers in such a way as to minimize the number of memory references. In this paper, we compare several register allocation methods and have designed and implemented a global register allocator using priority-based graph coloring.

일본 Okinawa지역에서 두류유전자원의 수집과 Vigna riukiuensis의 지리적 변이

윤문섭,Kaga, Akito,Tomooka, Norihiko,Vaughan, Duncan,백형진,김창영 한국국제농업개발학회 2003 韓國國際農業開發學會誌 Vol.15 No.4

일본 남서제도에 자생하는 두류 근연야생종집단의 분포와 집단구조를 파악하기 위해서 1999년 10월 21일부터 29일 까지 오끼나와 지역의 Hateruma, Tarama, Yonaguni 섬들에서 탐색ㆍ수집을 수향한 결과와 이들 섬으로부터 수집된 Vigna riukiuensis 집단에 대한 AFLP분석을 통하여 그들의 지리적 변이를 분석한 결과는 다음과 같다. 1. 일본의 본도에서는 발견되지 않는 Vigna riukiuensis, V. reflexo-pilosa, V. luteola, V. minima, Canavalia rosea 및 Glucine tabacina와 같은 야생종을 수집하였으며, 또한 재배종인 Macroptilium atropureum, Vigna unguiculate 및 Glycine max를 수집하였다. 2. V. riukiuensis는 잔디밭에서만 발견되었고, V. marina와 C. rosea는 해안가의 모래사장에서 주로 발견되어 두류의 내염성 육종에 유용한 재료가 될 것으로 기대되었다. 서식집단의 범위는 10여 개체에서부터 1㏊에 이르기까지 매우 다양했다. G. tabacina는 Miyako의 바닷가와 인접한 잔디밭에서만 발견되었으며, 사료작물로 도입된 M. atropureum은 대부분의 섬에서 반 재배형으로 널리 분포하고 있었다. 3. 수집된 자원은 총 74점으로서 V. riukiuensis 27점, V. reflexo-pilosa 10점, V. marina 17점, V. luteola 2점, V. unguiculate 5점, G. tabacina 5점, G. max 1점, M. atropureum 3점 및 C. rosea 4점을 각각 포함했다. 또한 이들 자원에 대한 근류균의 수집과 식물표본이 만들어 졌으며, 각 수집지점의 위치가 기록되었다. 4. V. riukiuensis집단들 사이의 지리적 유연관계는 principal coordinate analysis(PCA)에 의해 처음 두개의 주요성분은 전체변이의 57.9%를 설명했다. 전체 변이의 46.0%를 설명하는 PCA1은 Yonaguni-Ishigaki-Iromote-Hateruma집단과 Miyakowlqeks으로 구분시켰다. 전체변이의 11.9%를 설명하는 PCA2에 의해 Haterumawlqeks은 Yonaguni-Ishigaki-Iromote집단과 분리되었다. Exploration and collection of legume genetic resources was conducted on the southern islands of Okinawa prefecture, Hateruma, Iriomote, Irabu, Ishigaki, Miyako, Tarama and Yonaguni islands, Japean, from 21^(st) to 29^(th) October. 1999. From these islands, the following wild species were collected Vigna riukiuensis, V, reflexo-pilosa, V. luteola, V. marina, Canavalia rosea and Glycine tabacina and seeds or root nodules of the following cultivated species Macroptilium atropurpureum. Vigna unguicullata and Glycine max. The wild species collected were generally found in open herbaceous habitats such as roadside bushes, lawns or on beaches. Several species have specific adaptations such as V. riukiuensis and G. tabacina whic can survive in cut lawns. V. marina and C. rosea grow along sandy beaches of every island visited and may have physiological tolerances, such as salt tolerance, which may be of value in legume breeding. Population size varied greatly within and between species from less than 10 plants to covering more than 1ha. M. atropurpureum, introduced as a forage crop, has escaped and is widely changing. During this exploration and collection, V. riukiuensis and V. reflexo-pilosa , from the subgenus Ceratotropis were both found on Ishigaki, Iriomote, Yonaguni and Miyako islands. On the small island of Irabu and Tarama only V. reflexo-pilosa from the subgenus Ceratotropis was found. On Hateruma only V. riukiuensis from subgenus Ceratotropis was found. A total of 74 wild legume seed samples were collected. The comprehensive collection will enable diversity analysis to highlight islands and populations of particular genetic diversity for conservation and evaluation. Geographical variation of V. riukiuensis among the collected species was found within it's populations by AFLP analysis. Populations of Miyako island were genetically different from of other islands of Okinawa based on PCA.