태양광 발전전력을 입력으로한 DC/DC 컨버터의 일정출력제어

조용길,허태원,신동률,조광승,우정인 東亞大學校 大學院 2000 大學院論文集 Vol.25 No.-

In this paper, it is proposed to constant power control of solar power system. The solar power system has disadvantage that low power density and variable power output. Proposed strategy is controled by DC/DC converter using phase shift PWM and I-PD type control applying type 1 digital system. The validity of proposed control strategy is verified from simulations results using PSIM.

영구자석형 선형동기전동기의 위치제어를 위한 가변구조 벡터제어 시스템에 관한 연구

우정인,신동률,허태원,조광승 東亞大學校 2000 東亞論叢 Vol.37 No.-

OA, FA기기 등에 에너지 밀집도를 높일 수 있는 영구자석형 선형동기전동기(PMLSM)를 적용하고자하는 연구가 활발하게 진행되고 있다. PMLSM은 파라메터의 변동과 외부의 외란에 매우 민감하다. 이러한 PMLSM의 구동에 있어서 요구되는 것은 파라미터 변동과 부하 토크 외란에 견실하면서 빠른 응답속도를 가지는 제어기이다. 따라서, 본 논문에서는 PMLSM의 위치제어를 위한 가변구조 벡터제어시스템을 제안하고자 한다. 파라메터 변동과 외부외란의 변화에 강인한 가변구조 기법을 이용한 슬라이딩 모드제어의 타당성을 시뮬레이션을 통하여 검증하고자 한다.

최근 5년간 약진으로 입원한 환자의 고찰 - 임상양상 및 검사소견(1986∼1990) -

고우석,조광현,윤재일 大韓臨床藥理學會 1993 臨床藥理學會誌 Vol.1 No.1

마르코프 과정을 이용한 유행병 관리 모델

정형환,주수원,이광우 동아대학교 공과대학 부설 한국자원개발연구소 1987 硏究報告 Vol.11 No.2

This model is built up according to the ecologic relationships between different epidemiological types of individuals. A Markovian process is associated to the epidemic control process with a finite number of states and a discrete time. {Y_(t), t≥0} The quantitative aspect of the model was characterized by digital computer simulation.

한국산 총채벌레의 분포, 기주 및 분류학적연구

趙廣善,權五均,禹建錫 서울대학교농과대학농업개발연구소 1991 서울대농학연구지 Vol.16 No.2

본 연구는 우리나라 총채벌레의 분포 특성과 기주식물을 조사하기 위하여 1987년 6월부터 1990년 7월까지 공시작물을 대상으로 전국적으로 실시하였다. 본조사에서 얻어진 결과는 다음과 같다. 1. 벼에서 조사된 총채벌레는 벼총채벌레 : Stenchaetothrips biformis, 엉겅퀴총채벌레 : Thrips setosus, 중국관총채벌레 : Haplothrips chinensis, 벼관총채벌레 : H. aculeatus 대만총채벌레 : Franklinilla intonsa등 5종이었다. 2. 조미채소류에서는 고추, 마늘, 양파, 파, 참께 등에서 대만총채벌레 : Fr. intonsa등 9종이 조사되었으며, 하와이총채벌레 : Thrips hawaiiensis와 좀머리총채벌레 : Microcephalothrips abdominalis등 2종을 추가하였다. 3. 과채류에서는 파총채벌레 : Thrips tabaci등 7종이 조사되었다. 이들중 중국관총채벌레 : Hap. chinensis, 대만총채벌레 : Fr. intonsa는 조미채소류에서와 같이 기주범위가 넓었다. 4. 파총채벌레 : Thrips tabaci의 기주식물은 Allium속 등 24종으로 밝혀졌다. 5. 우리나라의 총채벌레분포상은 기지종과 미기록종 Thrips simplex등 8종을 추가하여 63종이며 전체의 약 77%가 총채벌레과에 속했다. This study was carried out investigate the fauna of thrips and their relationship to host plants throughout the country from June, 1987 to July 1990. The results of this study were as follows. 1. Stenchaetothrips biformis, Thrips setosus, Haplothrips chinensis, Haplothrips aculeatus, Frankliniella intonsa were found in the rice. 2. Eleven species including Frankiniella intonsa, Thrips hawaiiensis and Microcephalorthrips abdominalis were found in the seasoning fruit vegetables such as red pepper, garlic. onion, welsh onion and sesame. 3. Seven species including Thrips tabaci were found in the fruit vegetables, especially among them, the host range of Haplothrips chinensis and Frankiniella intonsa was very wide. 4. Thrips tabaci was found in 24 species of plants including Allium. 5. Eight species including Thrips simplex were recorded in this study, so the total number of recorded thrips was 63. 6. The fact was known from this study that Family Thripidae included 77% of total recorded thrips in Korea.

Helicobacter pylori와 대장균의 Shuttle Vector 개발

조명제,이우곤,이상룡,김경희,안영숙,김성희,김현주,류복덕,최여정,윤영혜,백승철,전영석,이광호 경상대학교 유전공학연구소 1997 遺傳工學硏究所報 Vol.16 No.-

In this study, a vehicle vector using cryptic plasmids was constructed for gene transfer in Helicobacter pylori. pHP51(3.9 kb) and pHP489(1.2 kb) were selected for constructing vectors from cryptic plasmid of H. pylori isolates in Korea. The HindⅢ-digestedDNA fragment(1.2kb) of pHP489 and 1.6kb DNA fragment of pHP51 were ligated with a kanamycin resistance gene(aph3'-Ⅲ) from C. jejuni to produce the recombinant plasmids pHP489K and pHP51K, respectively. Transformation frequency of pHP51K by electroporation was low. But pHP489K could be effectively transformed into various H. pylori strains. In order to design an intermdiate vehicle vector for gene transfer into H. pylori, pBlueHP489K was prepared by recloning pHP489K DNA into pBluescript and pTZ19R vector. This vector permitted the DNA fragment containing pHP489 sequence, aph3'-Ⅲ, and cloned DNA to be cut and self-ligated in the SacⅠ site after cloning. ureA and ureB gene were inserted into pBlueHP489K, resulting in pBlueHP489K/AB. The DNA fragment containing pHP489, kanamycin resistance gene(aph3'-Ⅲ), and urease structural gene was cut away from pBlueHP489K/AB and self-ligated to generate pBlueHP489K/AB. pBlueHP489K/AB made urease-negative H. pylori strains restore their urease activity. By this experiment, pBlueHP489K was confirmed to be the vehicle system for transferring H. pylori genes.

심실중격결손증-치험 1예-

조광현,우종수,황윤호,이양행,박철호,김종성,김철호,이경순,조영일,박태인 인제대학교 1985 仁濟醫學 Vol.6 No.4

A successful treatment of infants and children with congenital heart defects depends upon several factors: diagnosis must be accurate, the operative technique, including techniques of perfusion and myocardial preservation, must be suited to the needs of patients and intensive cares, including accurate anesthesia, must be applied through all stages of investigation and treatment, i.e. before, during and after the operation. Recently we performed a open heart surgery successfully for a six-years old girl who had suffered from frequent upper respiratory tract infection and mild to moderate exertional dyspnea with congenital heart defects (ventricular septal defect, Kirklin type II, with patent foramen ovale). The operation and postoperative course were very smooth. And now we report this with review of literatures.

토양으로부터 분리한 곰팡이에 의한 γ-Linolenic Acid 생산

조광연,이철우 한국식품영양학회 1995 韓國食品營養學會誌 Vol.8 No.1

100개의 토양시료로부터 120종의 곰팡이를 분리하여 이 중 GLA 생성능이 가장 우수한 균주를 선발하여 Fusarium 속으로 동정하였다. Fusarium 속이 생산하는 균체량과 지방질 함량은 각각 620㎎/100㎖, 63.5㎎/100㎖ 이었으며 전체 지방산 중 GLA가 차지하는 함량은 약 10.2% 이었다. 120 fungal strains producing γ-linolenic acid(GLA) were isolated from 100 soil samples, and among these, the most suitable one for the production of GLA was identified as Fusarium sp. JK-02. The content of total lipid and dry cell weight was 620㎎/100㎖ and 63.5㎎/100㎖, respectively. The production of GLA was 10.2% of the total fatty acids.

바닥복사냉방의 공동주택 현장적용에 관한 연구

조영흠,임재한,여명석,김광우 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

The objective of this study is to analyze the applicability of the Radiant Floor Cooling integrated with dehumidification system through field experiments. The experiments are performed to evaluate the thermal environments and system operations according to varying the load conditions which is able to happen to field and show the available cooling source for radiant cooling system. The results of this study are as follows. 1) The radian floor cooling integrated with dehumidification system shows stable thermal environments and system operations in view of these aspects : control offset room air temperature, preventing condensation, stayed within the comfort range. 2) A supplementary cooling device can reduce the cooling time at the beginning because it can utilize radiant and convective cooling method. 3) The result of analyzing the change of the cooling water temperature in the actual apartment building shows that the system can operate according to the planning value.

Tetramethylenediamine에 의한 아크릴纖維의 改質에 관한 硏究

趙龍錫,許萬宇,李光祐 대구효성가톨릭대학교 1989 연구논문집 Vol.39 No.1

To study the possibility of modifcation of acrylic fiber, Cashmilon SF was treated with tetramethylenediamine (TMDA) in toluene without catalyst. And dye adsorption dyed with Benzyl Scarlet BS and tenacity of modified acrylic fiber were measured. Following results were obtained, 1. Cashimilon was reacted with TMDA by condensaton reaction at above 130℃. 2. Acrylic fiber treated with TMDA could be dyed by acidic dyes. 3. The tenacity of acrylic filber treated with TMDA was decreased, so the pilling of the fiber will lessen.