정수처리 막분리 Pilot 시스템의 성능 평가

김지훈,김형수,염익태,한기봉 대한상하수도학회 2003 상하수도학회지 Vol.17 No.1

In this study, results of a microfiltration(MF) pilot plant are presented based on 6 months on-site experience. Performance evaluation of the hollow fiber membrane system was focused on two criterions: (i) permeated flux and operation time (ii) treated water quality. The pilot plant was operated in dead-end filtration mode under a constant flux. A module of hollow fiber membranes(polyethylene, nominal pore size: 0.1㎛) was used in this experiment. 15LMH(ℓ/㎡ · hr) operation kept much longer operation time compared with 30 LMH(ℓ/㎡ · hr) operation. After about four months of 15LMH operation, increase of suction pressure were less than 15cmHg and the membrane fouling was not serious. Overall, the results of this study demonstrated that 15LMH operation was a more effective and stable process than 30LMH operation for drinking water treatment.

SAR 신호처리 알리고즘의 개발 및 구현

양훈기 光云大學校 1995 論文集 Vol.24 No.-

The far field radiation pattern of a radar resembles a spherical wave. The existing SAR inverse methods are based on approximations for the spherical radiation pattern of the radar, e. g., the Fresnel approximation(stripmap-mode SAR), or the planewave approximation (spotlight-mode SAR). These methods fail in the case of high resolution imaging of a large object area. In this paper, we present a SAR system model and an inversion method based on a spatial Fourier decomposition. It is shown that this spectral decomposition transforms nonlinear phase functions of the target's spatial domain and synthetic aperture domain into linear phase functions. The performances of the proposed method implemented using simulated data are compared with those of the abovementioned approximation based methods.

太陰調胃湯이 白鼠의 肥滿症 및 誘導肥滿細胞에 미치는 效果

田炳薰,金敬堯,李基珠 대한동의병리학회 1996 동의생리병리학회지 Vol.10 No.1

太陰調胃湯은 四象體質中 太陰人에 적용되는 處方으로 그 구성은 주로 祛濕, 祛痰하는 藥物로 이루어져있다. 韓醫學에서 肥滿의 병리기전은 주로 濕痰이 체내에 전체된 것으로 보고 있는데 太陽調胃湯의 處方구성은 이와같은 體內濕痰을 제거하는데 알맞음을 볼 수가 있다. 이에 太陽調胃湯이 gold thioglucose와 高脂肪食餌로 誘發한 肥滿 마우스에 미치는 效果와 前指肪細胞의 增殖과 分化에 미치는 影響을 실험하고 관찰한 결과 다음과 같은 결과를 볼 수 있다. 1. 太陽調胃湯은 前脂肪細胞(3T3-L1 세포)의 增殖과 分化를 抑制한다. 2. 細胞內 脂質蓄積을 誘導하는 酵素와 中性脂質의 細胞內 蓄積을 抑制하는 效果가 認定된다. 以上의 結果로 보아 太陰調胃湯은 四象體質中 가장 肥濕하기 쉬운 太陽人의 肥滿治療에 有用할 것으로 思料된다. Effects of Taeyeumjoweetang on the obesity of mouse induced by gold thioglucose. It is researched to elucidate the effects of Taeyeumjoweetang on the obesity of mouse induced by gold thioglucose and the diifferentiation and growth of preadipocyte, 3T3-L1 cell. The result were as follows. 1. Taeyeumjoweetang extract improved the blood level of transaminase changed by the obesity of mouse induced by gold thioglucose. 2. Taeyeumjoweetang extract inhibited the increase of liver fat and body fat induced by the obesity of mouse induced by gold thioglucose. 3. Taeyeumjoweetang extract inhibited the increase of body weight induced by the obesity of mouse induced by gold thioglucose. 4. Taeyeumjoweetang extract inhibited the growth of undifferentiate preadipocyte 3T3-L1. 5. Taeyeumjoweetang extract showed the effects of inhibition on the differentiation of preadipocyte 3T3-L1. The above results suggested that the Taeyumjoweetang extract may be used on the obesity induced by the overgrowth and differentiation of adipocyte, and the accumulation of fat in liver and body.

Incoherent Processing of ISAR data for Moving Targets' Detection

양훈기 광운대학교 신기술연구소 1997 신기술연구소논문집 Vol.26 No.-

본 논문은 SNR이 상당히 낮은 ISAR 데이터로 부터 인코히어런트한 처리를 거쳐 이동표적을 효과적으로 검출할 수 있는 방법을 제시한다. 제시된 방법은 위치와 시간의 함수인 ISAR데이터를 공간주파수 및 시간주파수 함수로 변환한 후 유한개의 시간주파수 함수에서의 공간주파수 함수를 인코히어런트하게 더해줌으로써 이동표적 성분을 검출한다. 주어진 ISAR 시스템 환경에서 수신신호의 공간주파수 평면에서의 대역폭을 제시하며, 인코히어런트하게 더하기 전에 요구되는 전처리과정을 설명한다. 사용되는 공간 주파수 신호가 많아 질수록 수신신호의 variance가 감소하여 표적성분이 검파되는 이유를 확률 통계적으로 설명하며, 마지막으로 수신주파수를 충분히 사용할때의 false alarm 및 miss 확률을 유도한다. An efficient incoherent method to detect moving targets’ signitures out of heavily corrupted ISAR data is presented. The proposed method, after converting a two-dimensional space-time received signal into a two-dimensional spatial frequency-temporal frequency domain, exploits a finite number of spatial frequency functions extracted from some specific temporal frequencies. Selected spatial frequency functions are incoherently added together such that the moving targets’ signitures are revealed out of clutter with lowered variance. The bandwidth of the targets’ signitures in the spatial frequency domain are determined and the pre-processing procedure required prior to incoherent addition is described. It is shown that from the probabilitic /statistic point of view, as the number of functions used for addition increases, the targets’ signitures should become more dominent. Finally, for a situation where a sufficient number of functions are added, a false-alarm and miss rates are derived.

초등학교 교과전담 교사 제도 개선 방안 연구

성기훈,박기호,임영무 서울교육대학교 2001 한국초등교육 Vol.13 No.1

The purpose of this study is to identify the problems in current departmental system in elementary school and to suggest some propositions for the development. In order to accomplish this purpose, this study surveyed the history of the developmental system, the present condition, and the point of view of elementary school teachers. On the basis of results analyzed in this study, the following conclusions were made. (1) The problems in current departmental system lie in shortage and selection of departmental teachers. In order to solve these problems, departmental teachers should increase and inservice education for departmental teachers is needed. (2) Subject matters for departmental teachers should be centered on physical education, music, art, English. Departmental teachers should be selected among specialists. (3) Class times per week for departmental teachers should be 15∼19. (4) Inservice education for departmental teachers should be operated in the teacher's education institute, university of education. Contents for education should be emphasize skill education, teaching exercise, teaching method. (5) Elementary school departmental teachers should be educated at university of education.

양방향TV 광고를 통한 구매행동(T-commerce)에 관한 연구 - 구매 후 영향과 향후 구매의사에 영향을 미치는 요인을 중심으로

이시훈,송기인 한국방송광고공사 2008 광고연구 Vol.0 No.78

본 연구는 양방향 광고를 통한 구매행동의 구매 후 영향과 향후 구매의사에 영향을 미치는 영향을 미디어 대체가 설과 확산이론을 토대로 조사하고자 하였다. 실제 T-commerce를 경험한 소비자 200명을 대상으로 전화조사를 실시한 결과, T-commerce 경험 후에는 TV홈쇼핑과 인터넷 쇼핑 구매건수가 감소하는 것으로 나타났다. Tcommerce 이용 만족도와 데이터 방송 이용 시간이 향후 T-commerce를 통한 구매의사에 정적인 영향을 미치는 것으로 나타났다. T-commerce에 대한 평가(긍정적, 부정적 평가), TV 시청시간, 인구통계적 특성은 향후 Tcommerce를 통한 구매의사에 미치는 영향이 발견되지 않았다. The purpose of this study is to research the effects of decision making on buying and buying behavior after buying on the basis of media substitution hypothesis and diffusion theory. The method of research was telephone survey and 200 consumers who have experienced Tcommerce was surveyed. In a result of this research, the number of buying in TV home shopping and internet shopping after experiencing T-commerce was declined. The Tcommerce satisfaction and the time using data broadcasting was in positive relation with decision making of buying with T-commerce. The evaluation of T-commerce, the time viewing TV, and the demographic factors were not related with decision making of buying with future’s T-commerce.

인슐린 비의존형 당뇨병 환자에서 혈장 Endothelin-1농도의 변화

신양수,조희충,김원식,국기용,김용화,정종훈,문철웅,배학연,양성훈 朝鮮大學校 附設 醫學硏究所 1992 The Medical Journal of Chosun University Vol.17 No.2

Endothelin(ET) is a 21-residue peptide originally isolated from the cultured porcine endothelial cells. There are at least three genes for endothelin:endothelin-1(ET-1), endothelin-2(ET-2), and endothelin-3(ET-3). Endothelins are present in various human biological fluids including plasma, urine, breast milk, and saliva and have been found elevated plasma ET concentrations in patients with diabetes mellitus, Patients undergoing maintenance hemodialysis due to chronic renal failure, patients with acute myocardial infarction, and patients with subarachnoid hemorrhage. Endothelial cell damage is suspected to occur in diabetic patients and may be one important cause of angiopathy, a major complication in diabetes mellitus. The elevation of ET in diabetic patients may be a marker of, and further exacerbate, their vascular disease. We measured the levels of ET-1 in plasma of 50 patients with non-insulin dependent diabetes mellitus(NIDDM) and 25 normal subjects by radioimmunoassay. The plasma ET-1 concentration (mean±S.D.) in NIDDM was 6.461 A2.510 f㏖/ ㎖, and was significantly higher than in normal subjects (4.567±1.155f㏖/㎖) (P<0.05). The plasma ET-1 concentration (mean±S.D.) in diabetic retinopathy group( 7.15±2.454 f㏖/ml) was significantly elevated than those in otherwise uncomplicated groups (5.348±2.390 f㏖/㎖)(P<0.01). The correlation between any clinical parameters and plasma ET-1 levels in NIDDM was not significant, In conclusion, this study suggest that the elevated levels of ET-1 in diabetic patients may be play a important role in the pathogenesis of diabetic complications.

새로운 Quinolone 誘導體의 合成에 關한 硏究(Ⅱ)

함원훈,고윤석,배형준,이기영,정영훈 성균관대학교 약학연구소 1995 成均藥硏論文集 Vol.7 No.1

Abstract - Palladium catalyzed cross-coupling reactions of aryl halides with organo tin reagents and π-sufficient aromatic heterocycles proceeded easily and efficiently during carbon-carbon bond formation. We used this method for the anti bacterial agents, and synthesis of new quinolone derivatives which have C-C bond at C-7 position of general quinolone moieties. Quinolone moieties, and aryl tin or aromatic heterocycles in the presence of palladium catalyst were coupled to afford new quinolone derivatives. The synthesis and structure-activity relationship are presented.

환자 응급처치용 실시간 수평유지 기법에 관한 연구

정지훈 ( Gee-hoon Jung ),강효근 ( Hyo-geun Kang ),김주언 ( Ju-eon Kim ),신재원 ( Jae-won Shin ),홍상택 ( Sang-taek Hong ),박진호 ( Jin-ho Park ),김영종 ( Young-jong Kim ) 한국정보처리학회 2017 한국정보처리학회 학술대회논문집 Vol.24 No.1

자연재해나 전쟁 등으로 인한 긴급 구호 상황에서의 환자에 대한 응급처치는 중요하다. 그러나 자연재해나 전쟁으로 인해 지면이 불균형해지면 응급 처치를 하기가 불편해진다. Absolute Table은 테이블, 자이로 센서, 가속도 센서, 초음파 센서, 스텝 모터, 모터 드라이버, 스크류와 너트, 각종 스위치들로 구성되어있다. Absolute Table의 전원을 키면 실시간으로 수평을 맞추고 유지해 평평한 작업대를 형성한다. 어떤 형태든 적용이 가능해 실시간 수평 유지 기술이 필요한 다양한 분야와 접목시킬 수 있을 것으로 예상된다.

열화상 카메라를 통한 온도 측정 데이터 신뢰도 분석

이지훈(Gee Hoon Lee),정임영(Im Y. Jung) 한국정보과학회 2022 한국정보과학회 학술발표논문집 Vol.2022 No.12