정합용 변압기를 고려한 ZVS-FB형 고주파 공진 인버터에 관한 연구

원재선,김종해,김동희,정도영,이상호,이봉섭 영남대학교 공업기술연구소 1999 工業技術硏究所論文集 Vol.27 No.1

In this paper, a theoretical analysis of zero-voltage-switching inverter with each capacitor in parallel with each switching device is presented along with experimental results. The proposed inverter offers both zero turn-on and zero turn-off switching losses, yielding high efficiency at high frequencies. In addition, the soft switching method reduces switching noise associated with the high frequency ringing and high voltage stress at the switching instants. Also, the equivalent circuit of a matching transformer converted primary to secondary side and normalized parameter for generally description are introduced to the estimation of the proposed circuit. A 1KW class-D inverter was built and tested. The theoretical results are in good agreement with the experimental ones. ZVS can be achieved above the resonant frequency and in a limited range of the load resistance. The proposed circuit is considered to be useful for induction heating applications.

ISP의 BcN 투자 및 요금체계 평가모형 : 실물옵션과 몬테카를로 시뮬레이션의 응용

김도훈,정한욱,방정희,박명선 한국정보사회진흥원 2006 정보화정책 Vol.13 No.3

모든 정보통신서비스가 All-IP 통합 인프라로 제공되는 BcN 구축은 우리나라의 핵심 국책사업 중의 하나로, 인터넷 강국으로서의 글로벌 입지를 굳히는데 결정적인 역할을 할 것으로 기대된다. 그러나 BcN 기술의 성숙에도 불구하고, 제도적 측면에서 이의 성공을 뒷받침하는 연구는 드물다. 특히 BcN 요금체계와 같은 정책적 문제에 대해서는 별다른 진전이 없다. 본 연구에서는 요금정책이 BcN 투자에 미치는 영향을, 실물옵션과 Monte Carlo 시뮬레이션을 이용하여 분석하였다. 실험결과, BcN 수요의 불확실성뿐만 아니라, 요금체계와 관련된 정책대안이 사업자의 수익구조와 투자동기에 중요하게 작용하였다. 또한 수익과 투자시점은 밀접한 관계를 가지며, 트래픽 규모가 수입에 직접 반영되는 요금체계에서 BcN 투자가 앞당겨짐을 알수 있다. 특히 ISP와 CP간의 요금체계가 투자 의사결정에 보다 크게 작용하는 것으로 파악된다. 이러한 결과는, 사업자의 자발적인 첨단 인프라 및 서비스 개발이 국민경제에 긍정적으로 작용하는 동태적 효과를 보다 전향적으로 검토할 것을 요청한다.

아파트 단지 입면녹화에 조형패턴 도입을 위한 연구 : 독일과 일본의 사례를 중심으로

김도경,여화선,박희경 경희대학교 부설 디자인연구원 2007 예술· 디자인학연구 Vol.10 No.1

To construct an environment-friendly apartment complex which considers the city environment and the human life. We should concern the various compositions, the form of arrangements and the outside view. However, the advertisements which is irrelevant with the region's culture and environments is ruining the city view. Especially, the necessity of wall greening is getting is being occurred mostly by passive ways. Such as using creeping plants. But this fact has limitations. In foreign countries, such as Germany and Japan, movements for improving the environment is occuring and to protect the environment, many researches about ecology is progressing. In this study, a device to improve the quality of city and city environment will be suggested by examining the patterns of sculpture in foreign countries.

전자화폐의 활성화 방안에 관한 고찰

강도원,강선희,이수형 남서울대학교 2003 남서울대학교 논문집 Vol.9 No.-

As the electxonic commerce motion by increase of internet use smartens recently, trust problem etc.. are happening regarding pnce payment and so on between person concerned that do electronic Commerce. Therefore, establishment of safe payment method to prevent when electronic commerce pays the former to get high trust, forgery of transaction information and improper acquisition is important. So, electronic money was appeared to realize safe electron payment as new electron payment means for electronic commerce on internet. Electron capital transfer or eIectron of disbursement settlement means and so on is being expose in general phenomenon for safe settlement in these environment. End, electronic money of excellent safety that do from various card mean to intermediary instead of cash, check was appeared. This study wishes to present ways that electronic money that is settlement means to analyze success factor and problems of eiectronic settlement system from e-commerce acts important role to get high trust is activated.

프로테오믹스 방법을 이용한 인간 SOD1 단백질과 상호작용하는 효모 단백질들의 탐색

최진선,이도희 서울여자대학교 2010 자연과학연구논문집 Vol.22 No.-

Amyotrophic lateral sclerosis (ALS) is a neurologic disease that rapidly progresses and causes death within 5 years of the onset of symptoms. Mutations of SOD1 gene have been linked to familial cases of ALS (fALS). Although many hypotheses have been suggested, the role of SOD1 in ALS pathogenesis still remains unclear. A hallmark for ALS is the presence of intracellular inclusions containing mutant SOD1 and ubiquitin, suggesting that cells attempt to eliminate SOD1 proteins by ubiquitin-proteasome system. Possibly the neuronal cells' failure to promptly eliminate unfolded SOD1 proteins leads to the protein accumulation and the eventual neuronal death. To study the role of ubiquitin-proteasome system in the degradation of mutant SOD1 proteins, we used yeast Saccharomyces cerevisiae as a model system. When being expressed in yeast, G93A mutant of hSOD1 was degraded rapidly, while wild-type SOD1 was stable. Most of SOD1 expressed in yeast, unlike in mammalian cells, remained soluble. To identify proteins interacting with SOD1 and investigate their roles in the SOD1 degradation, we immunoprecipitated SOD1 and analyzed the binding partners by 2-DE followed by MALDI-TOF mass spectrometry. We found that chaperone proteins (hsp26 and GrpE) as well as a proteasomal subunit (Rpn9) bound to SOD1, indicating that yeast recognizes SOD1 as abnormal proteins and eliminate them efficiently. 서론 2 재료 및 방법 3 시약 및 실험재료 3 효모의 배양 4 SDS-PAGE와 Western-blot 분석 4 면역침전법 4 효모 세포에서의 SOD1 단백질 분해도의 측정 5 효모 세포에서의 SOD1 단백질 용해도의 조사 5 이차원 전기 영동 5 1차원 전기영동 5 2차원 전기영동 5 Silver 염색 5 염색된 단백질의 탈색과 in-gel trypsindigestion 6 MALDI-TOF Mass Spectrometry 분석 6 데이터 베이스 검색 6 결과 및 고찰 7 인간 SOD1 단백질의 효모 내에서의 발현 확인과 반감기 조사 7 인간 SOD1 단백질의 용해도 분석 8 면역침전과 2차원 전기영동을 이용한 인간 SOD1 단백질과 결합하는 효모단백질들의 분리 및 MALDI-TOF 분석을 통한 동정 9

롤러스케이트 선수의 운동상해발생과 예방에 대한 조사 연구

김동희,김도수,채양석,이하얀,김선호,조성채 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.1

The study was intended to research the fact of roller skate players injury. For the study, kinds and parts of injuries, skills to be hurted, facility, injured time, cause, remedy, mental response and protecting were investigated through 182 roller skate players. The results were as follows : 1. The injury body part was showed that leg was the highest and followed by knee and ankle. 2. In the cause of injury was showed as follows: skills on corner work, bank track with concrete, 200m distance. 3. In the general cause of injury was showed: chronic fatigue by over training. 4. In the treatment and participation period after injury outbreak were showed: treatment period was toward the inside 1 week and participation to play during the treatment. 5. To the injury prevention players responded warm up, and cool down and mental-concentration were needed. Supervisor, coach and players responded knee protector wearing was needed in elementary school players and helmet-chin protector wearing in general players. The game rule revision was not necessary and the agree and disagree for ground unity to resemble. Almost players to be like concrete ground.

커패시터 공진전압을 이용한 하프 브릿지 고주파 인버터의 특성해석에 관한 연구

김동희,김도선,김종해,노채균 嶺南大學校 工業技術硏究所 1997 工業技術硏究所論文集 Vol.25 No.2

This paper presents operating characteristics of the main conversion considering half-bridge high frequency resonant inverter using capacitor Resonant voltage to the object of research. The analysis of the proposed circuit describes generally by using normalized parameter, and basic operating principle and driving characteristics have been evaluated as to switching frequency and load parameter. Several features are considered, this paper suggests some fundamental data for designing the main power conversion circuit. To prove rightfulness for characteristics analysis of proposed inverter, it is confirmed that this paper are nearly, equal to circuit analysis by comparison theoretical and experimental waveforms results of proposal inverter using Power-MOSFET of switching devices. In the future, design technique proposed in this paper can be applied to several areas such as induction heating, power supply of DC-DC converter, UPS etc.

蜂毒藥鍼이 脊髓內 痛症關聯 神經細胞의 活性에 미치는 影響

鄭善喜,李栽東,高炯均,安秉哲,崔道永,朴東錫 경희대학교 동서의학연구소 2001 東西醫學硏究所 論文集 Vol.2000 No.-

In spite of the use of Bee Venom aqua-acupuncture in the clinics, the scientific evaluation of effects is not enough. Bee Venom aqua-acupuncture is used according to the stimulation of acupuncture point and the chemical effects of Bee Venom. The aims of this study is to investigate the analgegic effects of the Bee Venom aqua-acupuncture, through the change of writhing reflex and the change of c-fos in secondary neurons in the spinal cord. Materials and Methods : Pain animal model was used acetic acid method. The changes of writhing reflex of the mice which were derived pain by injecting acetic acid into the abdomen, after stimulating Bee Venom aqua-acupuncture on Chungwan(CV12) were measured. We used Fos immunohistochemical technique to study the neuronal activity in the spinal cord. Results : 1.Expression of c-fos in superficial dosal horn(SDH), nucleus proprius(NP) and neck of dorsal horn(N) on 6~9th thoracic spine decreased significantly at 2.5×10-4g/kg Bee Venom aqua-acupuncture, compared with saline-acetic acid group. 2.The numeral change of Fos-LI neurons on the NP, N, and ventral gray(V) on 6~9th thoracic spine, SDH on 9~11th thoracic spine, and SDH and V on 11~13th thoracic spine decreased significantly at Chungwan(CV12) Bee Venom aqua-acupuncture, compared with saline-acetic acid group. 3.The correlation between the numbers of writhing reflex and Fos-LI neurons in T6-13 segment was statistically statistically significant at Chungwan(CV12) Bee Venom aqua-acupuncture. Conclusion : This study shows that the Bee Venom aqua-acupuncture on Chungwan(CV12) decreases the numbers of Fos-LI neurons. As the analgegic effects of Bee Venom aqua-acupuncture is recognized. Bee Venom aqua-acupuncture treatment is expected for pain modulation. In order to use it in many ways. more researches are needed for the dose and stability of Bee Venom aqua-acupuncture.

인터넷 광고현황과 개선방안 연구

강도원,강선희,이수형 남서울대학교 경영연구센타 2003 경영연구 Vol.5 No.-

Internet advertising is an important advertising instruments(media) in the present time. So today's internet advertising grown up exceedingly This study is focus on intenet advertising conditions and various problem. And in connection with problems, this study suggests various improvement programs.

Aspergillus oryzae를 이용한 캡슐형 메주의 품질특성

최재훈,권선화,이상원,남상해,최상도,박석규 한국식품저장유통학회 ( 구 한국농산물저장유통학회 ) 2003 한국식품저장유통학회지 Vol.10 No.3

전통메주의 표면에서 발행하는 야생곰팡이 착생, 유해곰팡이에 대한 mycotoxin 생성 및 메주 표면의 과도한 건조 등을 해결하기 위하여 메주 외층에 Aspergillus oryzae로 만든 쌀 종국(0.3%, w/w)을 혼합시킨 증자 검정콩으로 얇게 코팅한 후, 25℃, 상대습도 80%에서 14일간 발효시킨 캡슐형 메주를 개발하였다. 캡슐형 메주의 표면에서 야생곰팡이의 오염은 발견되지 않았으나, 대조구 메주는 12일 이후에 푸른곰팡이가 많이 관찰되었다. 메주의 수분 함량은 평균 32.7%로서 34.7~29.4%의 범위를 나타내었다. 적정산도는 캡슐형 메주가 대조구 메주보다 높게 나타났으며, 대두 캡슐형 메주와 검정콩 캡슐형 메주는 비슷하게 나타났다. 유리당의 함량은 검정콩 캡슐형 메주가 123.98㎎%로 대조구 메주 15.02㎎%와 대두 캡슐형 메주 59.85㎎%보다 각각 10배, 2.1배, 높게 나타났다. 아미노산성 질소의 함량은 대조구 메주에서 147.00㎎%였으며, 검정콩 캡슐형 메주는 255.50㎎%로서 대두 캡슐형 메주 187.25㎎%보다 약 1.37배 높은 함량을 나타내었다. 총 유기산의 함량은 캡슐형 메주(대두 119.98㎎%, 검정콩 95.94㎎%)가 대조두 메주(26.44㎎%)보다 함량이 높게 나타났으며, 캡슐화에 따라 lactic acid와 malic acid 가 가장 큰 변화를 나타내었다. 색차계 색도는 검정콩 캡슐형 메주가 대두 캡슐형 메주보다 명도값(L)이 크게 나타났으며 지방산 조성은 메주의 종류에 따라 큰 차이를 나타내지 않았다. 총 유리 아미노산의 함량은 검정콩 캡슐형 메주(1039.70㎎%)가 대두 캡슐형 메주 (556.07㎎%)와 대조구 메주(236.45㎎%) 비하여 각각 2.4배, 4.4배 높았다. In order to improve some problems such as contamination of undersirable mold, mycotoxin production and excessive drying on the surface of traditional meju, we developed a capsule type-meju(CM) coated with steamed black bean and Aspergillus oryzae - rice koji(0.3%, w/w) mixture to surface of traditional meju and fermented at 25℃ for 14 days under 80% relative hunmidity. Contamination of undersirable mold on the surface of CM was not detected within 2 weeks and some genus Penicillium molds on control meju without koji were found naturally after 12 days of fermentation. The moisture content of meju was showed to be in the range of 34.7 - 29.4% being 32.7(w/w) of mean value. Titratable acidities in CMs prepared with black bean(BCM) and soybean(SCM) were much higher than that in control meju, and BCM was similar to SCM. Free sugar content in BCM(123.98 ㎎%) was 10 times and 2.1 times higher than that in control meju(15.02 ㎎%) and SCM(59.85㎎%), respectively. Amino type nitrogen content in control meju was 147.00 ㎎% and its content in BCM(255.50㎎%) was 1.37 times higher than that in SCM(187.25 mg%). Total organic acid content in BCM(95.98㎎%) and SCM(119.98㎎%) were much higher than that in control meju(26.44 ㎎%), and then latic and malic acid contents were markedly changed according to capsulation of meju. Lightness value(l) of Hunter color index was much higher in BCM than in SCM. Fatty acid composition of CM was not different as compared to control meju. Total free amino acid content in BCM(1039.70 ㎎%) was 4.4 times and 2.4 times higher than that in control meju(236.45 ㎎%) and SCM(556.07 ㎎%), respectively.