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A Micro-Architecture Simulator
박병관,배상덕,서대화,윤용호,Park, Byung Kwan,Bae, Sang Duck,Seo, Dae Wha,Yoon, Yong Ho The Institute of Electronics and Information Engin 1987 전자공학회논문지 Vol.24 No.3
The microprogram is the key technology of the implementation of the processor's control unit. But the coding and testing it is the most tedious process in the developing a new computer system. We developed the conversational micro architecture simulator(C-MAS) in order to use it as a microprogram development tool and a run time analyzer of the microprogram. We discuss the hardware description language(HDL) for a smulation, the design constraints of the C-MAS, and the user interface of it in this paper. We used the C language as the description language, and developed it on the berkeley UNIX4.2.
박병관,문석배,정성은,정규환,박귀원,Park, Byung-Kwan,Moon, Suk-Bae,Jung, Sung-Eun,Jung, Kyu-Whan,Park, Kwi-Won 대한소아외과학회 2009 소아외과 Vol.15 No.2
Catheter related and perianal problems are common surgical complications encountered during the treatment of pediatric malignancies. However acute surgical abdominal emergencies are rare. The aim of this study is to review acute surgical abdominal complications that occur during the treatment of childhood malignancies. Out of a total of 1,222 patients who were newly diagnosed with malignant disease, between January 2003 and May 2008, there were 10 patients who required surgery because of acute abdominal emergencies. Their medical records were reviewed retrospectively. Hematologic malignancies were present in 7 patients (4 leukemia, 2 lymphoma, 1 Langerhans cell histiocytosis) and solid tumors in 3 patients (1 adrenocortical carcinoma, 1 desmoplastic small round cell tumor, 1 rhabdomyosarcoma). Seven patients had intestinal obstruction, two had gastrointestinal perforation and one, typhlitis. Intestinal obstructions were treated with resection of the involved segment with (N=2) or without (N=3) enterostomy. Two patients had enterostomy alone when resection could not be performed. Intestinal perforation was treated with primary repair. Typhlitis of the ascending colon was treated with ileostomy. Right hemicolectomy was necessary the next day because of the rapidly progressing sepsis. Three patients are now alive on chemotherapy and one patient was lost to followed-up. Among six patients who died, five died of their original disease progression and one of uncontrolled sepsis after intestinal perforation. Although rare, acute surgical abdominal complications can occur in childhood malignancies. Rapid and accurate diagnosis and appropriate operation are required for effective treatment of the complications.
고온 가열시 혼화재 종류 변화에 따른 고강도 콘크리트의 강도특성
박병관 ( Park Byung-kwan ),장기현 ( Jang Ki-hyun ),이성연 ( Lee Seong-yeun ),김상식 ( Kim Sang-shik ),양성환 ( Yang Seong-hwan ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
This study investigates the strength properties of the high strength concrete subjected to the elevated temperature corresponding to admixture types. The results are summarized as following. The fluidity and air content corresponding to admixture types are satisfied with the target value of the slump flow. For the properties of the hardened concrete, the compressive strength of the all specimens is about 80MPa at 28 days, and they shows similar tendency. The compressive strength corresponding to the elevated temperature is increased at 200℃, but slightly decreased at 400℃. In the case that the elevated temperature is 600~800, it is suddenly declined.
유동성 유지제 혼입율 변화에 따른 고성능 콘크리트의 기초적 특성
박병관(Park Byung-Kwan),노상균(Noh Sang-Kyun),백대현(Baek Dae-Hyun),裵長春(Pei Chang-Chun),한민철(Han Min-Cheol),한천구(Han Cheon-Goo) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
The study examined basic characteristics of fresh concrete and dynamic characteristics of hardening concrete followed by changes of mixing rate in fluidity-keeping agent as admixture to improve fluidity-keeping performance of high-performance concrete. There sults were as follows. Slump flow satisfied the scope of target in all mix proportions by design of mix proportion and its fluidity-keeping performance was better as the mixing rate of its keeping agent was increased irrespective of W /B, Air amount satisfied the scope of target in all mix proportions by design of mix proportion and all of the air amount followed by the diurnal variations irrespective of W IB was decreased. The setting time followed by each change of mixing rate in keeping agent was more delayed as W IB was higher and as the mixing rate of keeping agent was more increased. The setting time followed by change of curing temperature was more promoted as curing temperature was higher and was more decreased as the mixing rate of keeping agent was more increased. In changes of curing temperature, the early strength was more increased as curing temperature was higher and the early strength was similar irrespective of change of curing temperature in long-term age.
기안도,박병관,윤용호,Gi, An-Do,Park, Byung-Kwan,Yoonm Yong-Ho 한국전자통신연구원 1991 전자통신 Vol.13 No.2
HiPi-Bus 는 여러가지 전송형태를 지원하며 이들은 데이터 전송의 관점에서 읽기 전송과 쓰기 전송으로 구분할 수 있다. 본 논문에서는 이들 읽기 전송과 쓰기 전송에 소요되는 시간을 최소화하는 방법을 제안하였는데, 이때 쓰기 전송에 소요되는 시간은 400n sec 이며, 읽기 전송에 소요되는 시간은 최소 400n sec 이다.
Para-Vinylpyridine-vinylsulfonic Acid 수지(樹脂)의 합성(合成)과 이온 교환능(交換能)
성낙도,송해영,박병관,Sung, Nack Do,Song, Hea Young,Park, Byung Kwan 충남대학교 농업과학연구소 1982 Korean Journal of Agricultural Science Vol.9 No.2
고분자 킬래이트의 합성방법을 이용하여 4-vinylpyridine-vinylsulfonic acid-divinylbenzene 이온 교환체를 합성하여 이온 교환 특성실험을 한 결과는 다음과 같다. (1) 4-vinylpyridine-vinylacetate-divinylbenzene (1)의 합성은 4-vinylpyridine과 vinylacetate의 몰비가 2 : 1 이고 $95{\sim}98^{\circ}C$에서 50분간 가열하였을 경우가 가장 좋은 합성 조건이었으며 4-vinylpyridine-vinylsulfonic acid-divinylbenzene (2) 강산성 이온 교환수지의 양이온과 음이온교환 용량은 4.8meq/g와 2.5meq/g로 양쪽성 이었으며 Dowex 50W-X8과 비슷한 값을 얻었다. (2) pH가 증가할수록 Cd(II), Cu(II) 그리고 Co(II) 금속 이온의 흡착능이 증가하며 흡착력은 금속 양이온의 크기와 전하의 크기가 클수록 Cd(II)>Cu(II)>Co(II)의 순서로 보다 좋은 흡착력을 나타내였다. (3) 알콜의 량이 크다하여도 alkyloxonium이온의 탈수로 인하여 용매의 극성이냐 유전 상수에 미치는 영향이 분자와 이온간의 회합성이 원활하도록 하기 때문에 알콜의 량보다는 알콜의 차수가 흡착에 다소 영향을 미치며 낮은 산 용액과 알콜의 알킬기 차수가 작을수록(t-BuOH<s-BuOH<iso-BuOH<n-BuOH) 약간 증가하는 분포계수를 나타내었다. 이 현상은 Van ber waals 인력이 ligand 효과 보다 크게 작용하는 것으로 설명되며 일정한 산성용매에 대한 각급 알콜용매는 강산성 양이온 교환수지(2)에 대한 Cu(II)와 Cd(II)이온의 흡착에 영향을 미치는 결과를 얻었다. Copolymerization of the 4-vinylpyridine with vinylacetate and divinylbenzene initiated by azobis-isobutyronitrile was carried out in DMF in presence $BaCl_2$ at $98^{\circ}C$. Ion exchange res in, poly 4-vinylpyridine-vinylsulfonic acid-divinylbenzene was prepared by sulfonation of 4-vinylpyridine-vinylacetatp-divinylbenzene with concentrated sulfuric acid. The compositions of each synthetic resin were identified by means of ir adsorption spectroscopy. Anion and cation capacities of 4-vinylpyridine-vinylsulfonic acid-divinylbenzene ion exchanger were 2.5meq/g and 4.8meq/g, respectively. Adsorption of Cd(II) and Cu(II) ions have showed larger quantity in alkalie media. A study also was made of the influence of alcohol on the distribution coefficient of Cd(II) and Cu(II) ions between the synthetic ion exchanger, and solution containing hydrochloric acid, various alcohols and water. The distribution coefficients of metal ions decrease generally as the number of branches of carbon in the molecule of butyl alcohol increase. (t-BuOH<s-BuOH<iso-BuOH<n-BuOH).
고정수,한동설,오형식,박병관,김종현,오세웅,Jeong Soo Ko,Dong Sul Han,Hyung Sik Oh,Byung Kwan Park,Chong Hyun Kim,Se Woung Oh Korean Chemical Society 1991 대한화학회지 Vol.35 No.5
메탄올-물 혼합용매 및 수용성 CTAB, SDS 용액에서 2-에틸안트라센[2-EA]과 9-페닐안트라센[9-PA]에 빛을 조사하는 동안 1,3-디페닐이소벤조푸란[DPBF]이 감소되는 것으로부터 이 반응에 단일항 산소$(^1O_2)$가 관여된다는 화학적 증거를 얻었다. 용매의 극성에 민간함 UV 분광학적 특성을 이용하여 2-EA와 9-PA의 평균미세환경의 극성을 조사하였다. 2-EA와 9-PA가 수용성 CTAB, SDS 및 Brij 35 용액에 가용화될 때 그들의 평균 미세환경은 극성이었으며, 미세환경의 극성 파라미터는 미셀의 이온성에 영향을 받지 않았다. 2-EA의 평균 미세환경의 극성은 40%(w/w) 에탄올 수용액의 극성과 비슷했으며, 9-PA의 경우는 30%(w/w)와 40%(w/w) 사이의 에탄올 수용액의 극성과 비슷했다. 이들 화학종들이 수용성 미셀용액에 가용화될 때 대부분 미셀의 표면에 분포할 것이라는 것을 알았다. 여러 용매에서 2-EA와 9-PA의 광증감능을 검토하였다. 메탄올-물 혼합용매가 수용성 미셀용액보다 광산화반응에 유리한 것으로 나타났다. The chemical evidence for involvement of singlet oxygen during photoirradiation for 2-ethylanthracene [2-EA] and 9-phenylanthracene [9-PA] was based on the rapid decomposition of 1,3-diphenylisobenzofuran [DPBF] in methanol-water mixture and aqueous CTAB, and SDS micellar solutions. The average microenvironmental polarities of 2-EA and 9-PA were estimated by UV spectroscopic characteristics sensitive to the polarity of solvent. When 2-EA and 9-PA were solubilized in aqueous CTAB, SDS and Brij 35 solutions, their average microenvironmental polarities were polar, and their microenvironmental polarity parameter showed little dependence on the ionic properties of the micelles. The average microenvironmental polarity of 2-EA was similar to the polarity of 40% (w/w) aqueous ethanol, and that of 9-PA was similar to the polarity between 30 and 40% (w/w) aqueous ethanol. It was found that the greater part of these species might be distributed at the surface of micelles when they were solubilized in aqueous micellar solutions. The methanol-water mixture solution appeared to have characteristics more favorable for photooxidation reaction than aqueous micellar solutions.