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스위치드 릴럭턴스 전동기를 위한 구동시스템의 역률개선과 고효율에 관한 연구
한대희,최준혁,윤용호,정동효,김도군,원충연 성균관대학교 2003 학술회의지원논문목록집 Vol.2003 No.-
Switched Reluctance Motor (SRM) offers the advantages of simple and robust motor construction, high speeds and high efficiencies over a wide operating range of torque and speed, excellent controllability. However, SRM has the disadvantages of high current harmonics, and low power factor because of a capacitor filter is inserted in the power converter and inductance of SRM is high, it has pulse waveform of current. This paper deals with an energy efficient converter fed SRM system with the reduced harmonics and improved power factor and with higher efficiency. The validity of the proposed scheme is verified via experiment. We are implemented the proposed control system using 8OC196KC micro-controller.
『辨證奇聞』의 醫學的 特徵에 關한 考察 : 傷寒門을 중심으로 In view of ShangHan
이원석,박선동,박원환,김준기,김종대 동국대학교 한의학연구소 1998 東國韓醫學硏究所論文集 Vol.6 No.2
『辯證奇聞』은 淸代(1687年) 陳土鐸이 著述한 醫書로서 126門의 형식으로 이루어져 있다. 내용을 보면 한의학적 理法方藥의 논리체계를 제시하였다고 볼 수 있다. 明末淸初이후 중국에서는 實證的인 學風의 등장에 따라 歷史理論에 대한 비판 및 정리작업이 활발히 이루어지기 시작하였으며, 이 시기에 저작된 『辯證奇聞』은 현재 우리나라 臨床家에서 널리 膾炙되고 있는 秘方과 관련된 醫書중의 하나로 이에 대한 내용을 정리함으로서 현대와의 연계를 도모해 볼 수 있었다. 주로 腑臟辯證論治에 대한 시각에 입각하였고, 「傷寒論」을 보완하면서 비판한면도 찾아볼 수 있었다. 약물은 體內의 津液損傷與否를 살펴 사용하였다. In order to find the characteristic medical mothods of 『BianZhengGiMun』by the author ChenshiTo, we have translated and analyzed the mentioned book. Upon analyses, the following facts were noted: 1) 『BianZhengGiMun』is written and composed of case studies. Prescriptive methods described here differ rather from previously known methods, where as our nation's Oriental medicine practioners refer and consider these methods as miraculous modern methodologies. 2) Book's content has much similarities to 『ShangHanLun』's original text. Moreover, the content is adjusted towards presenting methodologies not covered in 『ShangHanLun』's text, together with adding more information to converse 『ShangHanLun』's methods as well as to critique them. 3) Diagnostic methods mainly follow the ZangFuBianZheng(朧腑辨證)'s pattern, where it's recorded information and theories are valid. 4) 『BianZhengGiMun』's prescriptive methods usually follow BuYinShengJin(補陰生津)'s form, where they were appropriate for that period and circumstances. 5) In consideration of all of the above factors, ChenShihTo grasped ShangHan and WenBing(acute febrile disease due to exogenous factor) as WaiGanReBing(外感熱病)'s double sided characteristics, where this corresponds with the current belief. It is believd that this in turn would provide much practical value to the present time.
김원사,이대준,신현숙 忠南大學校 環境問題硏究所 1998 環境硏究 Vol.16 No.-
The weathering of Namsan granite of Seoul was studied by polarizing microscopy, X-ray fluoresence spectroscopy and X-ray diffraction. The rock consists principally of quartz, feldspars and micas, together with very small amount of garnet, sillimanite, chlorite, sericite, muscovite, cordierite, zircon, and opaque minerals. Under the polarizing microscope, the weathering of the rock begins to breakdown of the feldspars into sericite and is then followed by alteration of quartz into micas. Decrease of amount of feldspars and quartz and increase of micas, with progress of weathering, are also confirmed by X-ray diffractogram. With advancing weathering, K₂O and Al₂O₃ markedly increased, while Na₂O, CaO, Fe₂O₃, TiO₂, and MnO₂ decreased. When water having penetrated into the rock through cracks and pore space developed between the minerals it becomes to react with minerals in contact resulting in strong alkaline or weak acidic solution. This kind of solution is interpreted to be a principal factor for the wathering of the rock.
Cutis Marmorata Telangiectatica Congenita 의 1예
김용대,송준영,이원석,박의수 啓明大學校 醫科大學 1988 계명의대학술지 Vol.7 No.2
Cutis marmorata telangiectatica congenita is a rare congenital vascular anomaly, characterized by congenital cutis maromrata, phlebectasia, opider nevi, ulceration, and in most instances, steady improvement from birth. We report a case of cutis marmorata telangiectatica congenita in 3-month-old boy who has developed localized, dark red reticulated mottling with shiny atrophic scars on the inner side of the left leg. Diagnosis was confirmed by clinical and histopathologic features.
XRD와 Mo¨ssbauer 분광법을 이용한 제주도 송이의 연구
최원준,고정대,홍성락 濟州大學校 基礎科學硏究所 2001 基礎科學硏究 Vol.14 No.2
송이는 화산 활동시 생긴 여러 물질가운데서 다공질의 화산암, 화산사, 화산회형태로 이루어져있다. 본 연구에서는 X-선 회절분석과 (57)^Fe Mo¨ssbauer 분광법을 이용하여 제주도 서부 4개 지역의 송이에 관하여 연구하였으며, 300K에서 X-선 회절피크와 300K와 77K에서 Mo¨ssbauer 스펙트럼을 측정한 결과 송이의 중요 구성물질이 quartz, olivine, pyroxene, ilmenite, hematite, magnetite임을 확인할 수 있었다. Scoria was made of volcanic materials which are porous volcanic rock, volcanic sand and volcanic ashes. In this study, we are reporting the results of measurements of the x-ray diffraction and (57)^Fe Mo¨ssbauer spectrum for the powder samples of scoria taken from four seperated western sites on Jeju island. The analysis of XRD peak at 300K and Mo¨ssbauer spectra at 300K and at 77K shows that the major compounds of Jeju island are composed of quartz, olivine, pyroxene, ilmenite, hematite and magnetite.
권오준,이은정,최웅규,손동화,이석일,정연건,지원대 한국위생과학회 2002 한국위생과학회지 Vol.8 No.2
새로운 장류제품으로서 보리등겨의 이용방안을 모색하기 위하여 간장을 만들어 연구하였다. 보리로 제조한 간장의 갈색화는 점차적으로 증가 하였으며 완만한 변화를 보였다. 향기성분으로는 4-vinyl-2-methoxy-phenol, benzeneacetaldehyde, palmitic acid, 2-furancatboxaldehyde, methyl-9, 12-octadecadienoate, di-(2-ethylhexyl)phthalate, diethyl phtalate, dibytyl-1,2-benzenedicatboxylate, 5-methyl-2-furancarboxaldehyde, 3,4-dimethyl-1h-pyrazole, phenylethyl alcohol, dioctyl-hexanedioate, dimethyl-1,2-benzenedicatboxylate, benzaldehyde, methional, 2-methoxy-phenol, n-furfurylidene-3-methylbutyl amine, 1-furfuryl-2-formyl pyrrole, tetradrcanoic acid, 5-methyl-pyrimidine, 4-methyl-5-hydroxymethyl-imidazole, maltol, 5-(5-methyl-2-furanyl)methyl-2-furancarboxaldehyde 순으로 높은 함량을 차지 하였다. For investigation of new utilization as jang-products, kanjang was prepared using barely bran. This study was conducted to investigate flavor components of kanjang during fermentation time. The optical density was gradually increased. Among the flavor components identified in kanjang made with barley bran, the contents of 4-viny1-2-methoxy-phenol was the most in quantity followed by benzeneacetaldehyde, palmitic acid, 2-furancarboxaldehyde, methyl-9,12-octadecadienoate, di-(2-ethylhexyl)phthalate, diethyl phtalate, dibutyl-1,2-benzendicarboxylate, 5-methyl-2-furancarboxaldehyde, 3,4-dimethyl-1h-pyrazole, phenylethyl alcohol, dioctyl-hexanedioate, dimethyl-1,2-benzenedicarboxylate, benzaldehyde, methional, 2-methoxy-phenol, n-furfurylidene-3-methylbutyl amine, 1-furfuryl-2-formyl pyrrole, tetradecanoic acid, 5-methyl-pyrimidine, 4-methyl-5-hydroxymethyl-imidazole, maltol and 5-(5-methyl-2-furanyl)methyl-2-furancarboxaldegyde.