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기생소자를 갖는 3층 구조의 이동체탑재 위성방송수신용 마이크로스트립 배열 안테나
채윤경,최익권 충북대학교 산업과학기술연구소 2002 산업과학기술연구 논문집 Vol.16 No.1
This paper describes the design and fabrication of a 4 by 16 microstrip array antenna to be mounted on vehicles for Korea-Sat broadcast reception. Each antenna element consists of singly fed corner-truncated rectangular patch and a parasitic element located over the patch to have broadband input impedance and gain characteristics. And the 2 by 2 subarray is fed sequentially in order to make the axial ratio bandwidth wider. The fabricated antenna is measured and found to have the gain of 24.5 dBi, return loss of less than -13dB and the 3dB beamwidth of ±12 ˚ in elevation and ±3 ˚ in azimuth in the Korea-Sat broadcast frequency band of 11.7 GHz ~ 12.0 GHz. The applicability of this antenna as a vehicle mountable one is proved through the Korea-Sat broadcast receiving experiment in real environment.
ULSI DRAM의 BIST 알고리즘을 위한 제어회로 설계
온정근,김대익,도경주,이영훈,이창기,전병실 전북대학교 전자산업개발연구소 1991 전자산업연구 Vol.2 No.-
Lately, more developed semiconductor technolgy is, higher integration per one chip is rapidly. Mow 64 Mb DRAM is used 0.3㎛ techonology. This very large integration is caused faults of new type, and exhaused much time for test. So algorithms which distiguish at higher faults coverage. less time and cost of test is reported. In this paper control circuit of Built-In Self Test(BIST) Algorithm was designed for ULSI DRAM and simulated with MYCAD. This control circuit is carried out steps of algorithm, controlled generation of test patterns and data, generated control signals of parallel test.
전태원,박익렬,엄우섭,이동기,우재홍,김경래,김은경,서한교,전병환,김광준,정진욱,박성태 서울대학교 체육연구소 2002 서울大學校 體育硏究所論集 Vol.23 No.2
The purpose of this study is to investigate the effect of Soccer playing in Plasma Lipids in Elementary Obesity Student. Subject for this study were consisted of 16 male(exercise group : 8, non-exercise group : 8), who were over 25% of body fat. Exercise group played soccer 3 times per week, one time was 90 minutes. Weight, % body fat, total cholesterol, high density lipoprotein cholesterol, low density lipoprotein cholesterol, triglyceride, c-ratio were measured at three time periods before exercise begin, and 5 and 8 weeks. The results were summarized as follow: Exercise group decreased significantly more than non-exercise group about weight, % body fat, total cholesterol, low density lipoprotein cholesterol, triglyceride, c-ratio. And Exercise group increased significantly more than non-exercise group about high density lipoprotein cholesterol. In conclusion, the regular aerobic exercise(soccer playing) for 10 weeks has great effects on control of serum lipid which is related to the increase well-being(reduced coronary heart disease, hyperlipidemia, hypertension, obesity et all.) in elementary obesity male student.
ULSI DRAM의 BIST 알고리즘을 위한 패턴발생회로 설계
온정근,김대익,도경주,이영훈,이창기,전병실 전북대학교 전자산업개발연구소 1991 전자산업연구 Vol.2 No.-
Lately, more developed semiconductor technolgy is, higher integration per one chip is rapidly. Mow 64 Mb DRAM is used 0.3㎛ techonology. This very large integration is caused faults of new type, and exhaused much time for test. So algorithms which distiguish at higher faults coverage. less time and cost of test is reported. In this paper control circuit of Built-In Self Test(BIST) Algorithm was designed for ULSI DRAM. This circuit generates patterns of the algorithm by input clocks.
반건식-백필터에 의한 소각배가스 중의 HCI, SOx 제거 (Ⅰ)
배병훈,신남철,고경숙,김춘희,문종익,임경택 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1
This study has been carried out to investigate the removal efficiencies of HCl/SOx in a Spray-Dryer/Fabric-Filter system. In HCl/SOx removal, we could identify the key factors such as spray dryer outlet temperature, molar equivalence ratio(MER) and fabric filter velocity, but we couldn't find out the correlation of HCl and SOx. The removals of HCl/SOx were inversely proportional to spray dryer outlet temperature(l30~170℃) and filter velocity(l.0~1.5 m/min), at the MER, HCl removal efficiency was strongly proportional to MER, but SOx, removal efficiency was not particularly increased by MER over 1.5. The removal efficiencies of HCl/SOx were improved over 10% at the fabric filter. In this Spray-Dryer/Fabric-Filter system, HCl/SOx removal efficiencies were about 99%, 96% respectively.
김윤신,이호,정유경,정익조,한백희 대한법의학회 2000 대한법의학회지 Vol.24 No.1
Paraquat is a bipyridilium nonselective contact herbicide and well-known pulmonary toxicants. Concentrated solution of paraquat may causes severe corrosive injury and multiple system organ failure. It is poorly absorbed from GI tract, but is extremely toxic and so one swallowed mouthful of Gramoxone(about 5ml) will be fatal. We experienced 3 cases of paraquat poisoning through injection and examined pathologic findings, medical records and concentration of paraquat in blood and tissues. We reviewed the mechanism of action of paraquat. pathologic changes of organ system, concentration of compound in the various organ and cause of death in autopsy cases.
동종 골수이식을 시행받은 환자에서 폐색성 세기관지염에 의하여 발생한 자발성 기종격동과 피하 기종
이병환,이제중,이연경,안재숙,김여경,황호인,박무림,조상희,정익주,김형준 대한조혈모세포이식학회 2002 대한조혈모세포이식학회지 Vol.7 No.2
저자들은 만성골수성백혈병으로 동종 골수이식과 이식편 부전으로 인하여 추가적인 말초혈액 조혈모세포이식을 시행 받은 환자에서 만성 이식편대숙주질환과 그 폐 합병증인 폐색성 세기관지염에 동반된 자발성 기종격동과 피하 기종이 병발한 1예를 경험하였기에 이를 보고하는 바이다. Obstructive lung disorders following after allogeneic bone marrow transplantation (BMT) in association with graft- versus-host disease (GVHD) contribute significant morbidity and mortality. We report a case of a 28-year-old man who developed spontaneous pneumomediatinum and subcutaneous emphysema complicating bronchiolitis obliterans after allogeneic BMT. He received an allogeneic BMT for chronic phase of chronic myeloid leukemia. Five months after BMT, he was boostered by allogeneic peripheral blood stem cells from the same donor due to graft failure. One month after the boostering, chronic GVHD developed and were treated with cyclosporine and steroid. The patients developed spontaneous pneumomediatinum and subcutaneous emphysema secondary to severe bronchiolitis obliterans 4 months after boostering donor cells. The air-leak syndromes were recovered by conservative management, including high-flow oxygen.