CuO-ZnO-Al₂O₃촉매상에서 메탄올의 수증기개질반응에 관한 연구

박해경,김문찬,김경림,이용제 연세대학교 산업기술연구소 1992 논문집 Vol.24 No.1

The steam reforming of methanol was studied over CuO-ZnO-Al₂O₃catalyst at the range of temperatures between 150℃ and 300℃, the atmospheric pressure, the contact times between 0.04g cat h/mL and 0.1g cat h/mL and mole ratios of water/methanol between 0.67 and 1.5 in a fixed bed continuous flow reactor. The conversion of methanol and the yield of H₂increased with the increase of pH in the precipitate solution and mole ratio of water/methanol. In the precipitate solution of pH 10, as the temperature increases especially above 250℃, the yield of H₂increased but the selectivity of H₂decreased due to side reaction. The activation energy of steam reforming of methanol was found to be 4.44 kcal/mol over CuO-ZnO-Al₂O₃catalyst at the mole ratio of Cu/Zn, 8:1.

척수 외상의 자기공명영상 및 신경학적 소견 : Delayed MR Image and Correlated Neurology

박용규,정진명,김은상,김재일,송해룡,한종우,신형진 대한신경외과학회 1992 Journal of Korean neurosurgical society Vol.21 No.11

19 patients with traumatic spinal cord injuries and associated neurological deficit were examined by delayed(> 1 month) magnetic resonance imaging(MRI), the result of which were correlated with neurologic and somatosensory evoked potential(SSEP) findings. 5 different MRI patterns were observed in these patients : (1) normal signal intensity(SI) on T1-and T2-weighted images(WI)(pattern N/N, n=6), (2) normal SI on T1-WI and high SI on T2-WI(pattern N/Hi, n=3). (3) low SI on T1-WI and high SI on T2-WI(pattern Lo/Hi, n=6), (4) syrinx(n=2), and (5) cord transection(n=2). The neurologic state was determined using Frankel's classification at admission and MRI time. Pattern N/Hi had best neurologic state except pattern N/N, and pattern Lo/Hi showed worst prognosis except pattern transection. SSEP findings relatively well correlated with neurologic findings, but did not exactly. The cause is probably that SSEP shows predominantly the function of ascending sensory systems of the cord, do not reveal motor pathways, directly or indirectly.

TMO 모델 명세 언어 C++T의 설계

박용우,김문회 건국대학교 산업기술연구원 1998 건국기술연구논문지 Vol.23 No.-

Currently, application areas of real-time systems using computers are rapidly increasing. However, development of real-time systems is slow because of the lack of a systematic approach. The heart of the systematic approach is an appropriate model for real-time systems which can abstract temporal and functional behaviors of real-time systems. Many models have been proposed Among them, the TMO (Time-triggered Message-triggered Object) model developed at UCI satisfies above-mentioned requirements. In this paper, we present the design of the C++T(C++Time) language that can specify the TMO model and the process modeling a scenario we propose using the TMO model and programming it. Finally, we conclude by describing additional thoughts on the C++T specification language.

韓國人 學生의 腦機能 優勢(Cerebral Dominance)와 손잡이(Handedness)의 傾向

박창근,김은희,박매자,배용철,홍해숙,조희중,주강 慶北大學校 醫科大學 1990 慶北醫大誌 Vol.31 No.4

This study was investigated the effects of specialization of brain functions, the distribution of handedness and the correlation between cerebral dominance and handedness. This was surveyed with the samples of 1,302 Korean boys and girls attending in junior high school and senior high school, residing in Taegu city. In this study, Alfred W. Munzert's questionnaire and Tames Bliss & Joseph Morella's questionnaire were used as the instrument for assessing the thend of cerebral dominance and handedness. The results obtained were as follows: Out of the total number of 1,302 examined, 73.7% of them were regarded as right hemisphere dominant type and 12.6% of them were regarded as left hemisphere dominant type. In right hemisphere dominant type, students of junior high school were higher incidence than senior high School. In bilateral and left hemisphere dominant type, students of senior high school were higher incidence than junior high school. In right handers most of them were right hemisphere dominant type. In left handers, most of them were right hemisphere dominant type and the incidence of boys were higher than girls.

한약제 복용으로 인한 연중독 1례

박찬국,김용균,박상호,정춘해,조건국 조선의대 1985 The Medical Journal of Chosun University Vol.10 No.1

공장 업무자동화를 위한 분산처리 시스템의 개발

박두순,공용해,오동익,정종석,오은숙 호서대학교 반도체제조장비국산화연구센터 2000 학술대회 자료집 Vol.2000 No.1

(주)한길은 콘크리트 2차 가공 업체로서, 주로 벤치플륨, 맨홀, 수로관, PC암거박스 등을 생산하고 있는 중소기업이다. 이 업체는 제품의 특수성과 생산 시설의 규모로 인하여 납품 계약 후에 미리 적정량을 생산하여 재고로 보유하면서 제품을 적기에 납품해야 한다. 그러나 현재 입고, 재고, 출고 관리 등의 업무전산화가 이루어져 있지 않을 뿐만 아니라 생산, 저장, 관리가 동일한 장소와 더불어 지역적으로 분리된 곳에서 이루어지고 있어 정보관리에 많은 어려움을 겪고 있다. 이에 본 연구에서는 근거리 네트워크와 전화접속 네트워크를 혼합한 하이브리드 형태의 분산 환경 시스템을 구축하여 경제적으로 가장 최적인 네트워크 솔루션을 제공하고, 이를 바탕으로 하는 입고, 재고, 출고 관리 시스템과 기본적인 회계 등의 전산 업무를 개발하여 업체의 생산성 및 경쟁력 향상을 도모하고자 한다.

효율적인 통합 업무를 위한 정보관리 시스템 구축

박두순,안종근,공용해,정재헌 호서대학교 반도체제조장비국산화연구센터 2001 반도체장비학술심포지움 Vol.2001 No.-

기업의 효율적인 정보시스템 구축은 정보화 사회에서는 반드시 필요하다.또한 기업의 성장 규모, 기업의 요구 사항, 기업의 보다 향상된 업무를 위해 시스템을 능동적으로 구현, 확장, 재구성되어야 한다.이에 정보의 연계, 최신 정보의 효율적 관리를 이용한 구체화와 정보화를 유지할 수 있다.이를 위하여 중소 업체에서는 한 번에 많은 투자를 해야되는 종합 정보화 시스템보다는 생산 관리, 인사 관리, 회계 관리 등 각각에 대한 정보화를 위해 가장 기본적인 프로그램들을 업체의 특성과 차별성을 고려하여 실용 업무에 보다 적합한 자동화 시스템구성의 필요성이 강조된다.따라서 이들 시스템간에 서로 정보를 교환하고, 의사결정을 하는 종합 관리 시스템을 구축하여야 하는데, 이를 위하여 기존에 개발된 영업관리, 생산 관리, 인사 관리, 회계관리 프로그램들을 통합하는 것이 새로운 시스템을 개발하는 것보다 경제적, 기능적 측면에서 매우 유리하다 할 것이다. 본 연구에서는 (주)두양금속의 기존에 사용중인 영업관리, 생산 관리, 인사 관리, 회계 관리 시스템을 통합하고자 이미 구축된 시스템을 분석하고 각각의 독립된 업무를 연계하여 효율적인 정보 관리 시스템을 구축하는 것에 목적을 두고있다.

금속봉이 주기적으로 내장된 도파관 필터 특성 연구

박용현,이정해 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-

In this paper, the characteristics of a periodically loaded conducting post filter in a waveguide were studied experimentally and theoretically. Firstly, a conducting post effects in a rectangular waveguide were investigated with measurement, HFSS simulation, and Mode-Matching method. It is observed that a single conducting post plays an important role in the resonance since it makes capacitance and inductance. Therefore, theses effects need to be carefully considered when theses types of filter are designed. Both the filter and dispersion characteristics of periodically loaded conducting posts filter in a waveguide band-pass filter were measured. The results are compared with simulation, showing a good agreement. Especially, all dispersion curve of the filter structure is found to be linear over wide frequency range, suggesting that this structure could be utilized for the interaction circuit of the wide band Gyro- TWT.

von Willebrand's disease 1예

박치영,모성환,문철호,곽재정,김태종,전용준,박유환,정춘해 朝鮮大學校 附設 醫學硏究所 1995 The Medical Journal of Chosun University Vol.20 No.2

von Willebrand's disease (vWD) is the most common autosomal-dominant inherited disorder resulting from a quantitative or a qualitative defect of von Willebrand factor (vWF). The most diagnostic pattern is the combination of a prolonged bleeding time, a reduction in plasma vWF concentration, a parallel reduction in ristocetin cofactor activity, and reduced factor Ⅷ activity, In this case, ristocetin-induced platelet aggregation data were compatible with that of vWD. Bleeding times were prolonged over 4 minutes, vWF antigen levels were 45%. vWF ristocetin cofactor activities were 0~1% and factor Ⅷ levels were 31%, when compared to the normal control. We report the case of a family with vWD. characterized by a quantitative defect in vWF

병렬처리 시스템에서의 병렬수행을 위한 동기화 기법

박두순,공용해,김병수 순천향대학교 1992 논문집 Vol.15 No.1

This paper presents an effective synchronization algorithm, It is different from the existing synchronization methods by inserting appropriate synchronization instructions between statements according to different kinds of data dependences. Much efforts and interesting achievements about parallel execution of loop have been made, but they are not applicable to the cases of nested loops or irregular loops. In this paper, we focus on the solution of parallel execution of general loops introduce a new method on synchronization for parallel execution of loops.