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Passive 스타 구조를 갖는 고속 광 ATM 망에서의 채널 할당 알고리즘
이남재,강인곤,이팔진,金永川 全北大學校 1994 論文集 Vol.38 No.-
In single hop lightwave networks, the system performance using ALOHA-based protocols depends on the number of minislots in a data transmission frame. But, in the case of adopting this protocol to ATM, the multi-control channels are required in order to improve the system performance because the size of cell is fixed and short. In this paper, we propose a dynamic channel allocation algorithm with two-control channels. This algorithm dynamically alloctes channel for prioritized traffic in high-speed optical ATM networks. In order to evalute the performance of proposed algorithm, we simulate in terms of per channel throughput, cell loss rate. and cell delay with variations in offered load.
ATM망에서 비실시간 서비스를 위한 효율적 셀 제어 기법
김변곤,김남희,정동수,정경택,이종인 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-
The Guaranteed Frame Rate(GFR) service has been designed to accomodate non-real-time applications, such as TCP/IP based traffic in ATM networks. The GFR service not only guarantees a minimum throughput at the frame level, but also supports a fair share of available resources. In this paper, we propose a cell control algorithm which can improve the fairness and the throughput through the traffic control in GFR service. For the evaluation of a proposed scheme, we compare the proposed scheme with the existing scheme in the fairness and the throughput. Simulation results that the proposed scheme can improve the fairness and throughput than the existing scheme.
Ga_(0.6)Sb_(1.4)Se₃單結晶의 光傳導度 特性
宋燦日,劉炳守,李愚宣,金南伍,金亨坤 조선대학교 에너지.자원신기술연구소 2002 에너지·자원신기술연구소 논문지 Vol.24 No.2
Ga_(0.6)Sb_(l.4)Se₃single crystals were grown by the Bridgman technique method, These single crystals had orthorhombic structure, and lattice constant and electric conduction type of Ga_(0.6)Sb_(l.4)Se₃single crystals was a = 11.860Å , b = 12.057Å, c = 4.103Å and p-type, respectively. Direct band gap of Ga_(0.6)Sb_(l.4)Se₃single crystals obtained from optical absorption spectrum were 1.17 eV. Photoconductivity spectrum measured at 10K showed that the photoconductivity peak in Ga_(0.6)Sb_(l.4)Se₃single crystals was located in 960 nm.
유종수,방면호,정해곤,정태숙,최명숙,이경태,김세영,백남인 경희대학교식량자원개발연구소 2007 硏究論文集 Vol.26 No.1
강화 특화작목의 건강기능성 식품 제품화의 가능성을 타진하고 재배작물의 표준화 연구를 위해 사자발쑥, 싸주아리쑥 그리고 순무에 대해 총 폴리페놀과 총 플라보노이드 함량을 측정하였다. 총 폴리페놀 함량은 사자발쑥이 9.5mg/g, 싸주아리쑥이 7.4mg/g, 순무가 1.8mg/g으로 총 플라보노이드 함량은 사자발쑥이 4.3mg/g, 싸주아리쑥이 3.6mg/g, 순무가 0.4mg/g으로 확인 되었다. 또한 강화 약쑥의 유효지표성분인 eupatilin과 jaceosidin이 사자발쑥에는 각각 208mg/100g, 118mg/100g, 싸주아리쑥에는 199mg/100g, 111mg/100g 함유된 것을 HPLC를 통해 확인하였다. This study was conducted to investigate the contents of total polyphenol and total flavonoid of three Ganghwa indigenous crops, two varieties of Artemisia princeps Pampanini (Sajabalssuk, Sajuarissuk) and Brassica campestris ssp rapa. Total polyphenol and total flavonoid contents of Sajabalssuk were 9.5 and 4.3 mg/g, those of Sajuarissuk were 7.4 and 3.6 mg/g, those of B. campestris ssp rapa were 1.8 and 0.4 mg/g, respectively. The contents of eupatilin and jaceosidin in A. princeps Pampanini which were calculated by HPLC, were determined 208 mg/100g, 118 mg/100g in Sajabalssuk and 199 mg/100g, 111 mg/100g in Sajuarissuk, respectively.
싸주아리쑥(Artemisia herba)으로부터 phytol의 분리
유종수,방면호,정해곤,정태숙,최명숙,이경태,백남인 경희대학교식량자원개발연구소 2006 硏究論文集 Vol.25 No.-
싸주아리쑥 지상부의 80% MeOH 추출물로부터 얻어진 EtOAc 분획물에 대하여 silica gel 및 ODS column chromatography를 반복하여 diterpene을 분리하였다. 화합물의 화학구조는, NMR, MS 및 IR 등의 스펙트럼을 해석하여 phytol로 동정하였다. The aerial part of Artemisia herba was extracted with 80% aqueous MeOH and the concentrated extract was partitioned with EtOAc, n-BuOH and H_(2)O, successively. From the EtOAc fraction, a terpenoid was isolated through the repeated silica gel and ODS column chromatographies. From the result of physico-chemical data including NMR, MS and IR, the chemical structure of the compound was determined as phytol.
순무(Brassica campestris ssp. rapa) 뿌리로부터 지질화합물의 분리 및 동정
방면호,오영준,유종수,한민우,정해곤,정태숙,최명숙,이경태,김세영,백남인 경희대학교식량자원개발연구소 2007 硏究論文集 Vol.26 No.1
순무 뿌리로부터 활성 물질을 분리 동정 하기 위하여 80% MeOH 수용액으로 추출하고 이를 여과, 감압 농축하여 MeOH추출물을 얻었다. 이를 EtOAc분획, n-BuOH분획, H_(2)O분획으로 나누었으며, EtOAc분획에 대해 silica gel column chromatography를 실시하여 3종의 지질화합물을 분리 정제하였다. ^(1)H-NMR, ^(13)C-NMR, DEPT spectrum 및 Mass spectrum등을 통하여 palmitic acid methyl ester(compound 1), linolenic acid methyl ester(compound 2), linoleic acid methyl ester(compound 3)으로 구조를 결정하였다. In order to isolate and identify the active compound from the Brassica campestris ssp rapa, the roots and the root skin were extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and H_(2)O. From the EtOAc fraction, three compounds were isolated through the repeated silica gel column chromatographies. From the result of spectral data including NMR and MS, the chemical structures of the compound were determined as palmitic acid methyl ester (compound 1), linolenic acid methyl ester (compound 2), linoleic acid methyl ester (compound 3).
Lactic Acid Bacteria Increase Antiallergic Effect of Artemisia princeps Pampanini SS-1
Lee, Seung-Hoon,Shin, Yong-Wook,Bae, Eun-Ah,Lee, Bomi,Min, Sungwon,Baek, Nam-In,Chung, Hae-Gon,Kim, Nam-Jae,Kim, Dong-Hyun 경희대학교 동서의학연구소 2006 東西醫學硏究所 論文集 Vol.2006 No.-
Artemisia princeps Pampanini, which is called Ssajuarissuk in Korean (SS-1), was fermented with lactic acid bacteria (LAB) and their passive cutaneous anaphylaxis reaction-inhibitory activity was investigated. Of these fermented agents, SS-1 extract fermented with Bifidobacterium infantis K-525 (F-SS-1) most effectively inhibited the release of β-hexosamindase from RBL-2H3 cells induced IgE. In IgE-induced RBL-2H3 cells, F-SS-1 inhibited proinflammatory cytokines IL-6 and TNF-α mRNA expression. Oral administration of SS-1 and F-SS-1 to mice inhibited passive cutaneous anaphylaxis (PCA) reaction induced by IgE and scratching behaviors induced by compound 48/80. The inhibitory activity of F-SS-1 against scratching behaviors was more effective than that of SS-1. These findings suggest that the fermentation of SS-1 with LAB can increase its antiallergic activity.
Lee, Mi-Sun,Lee, Kyongsoo,Kim, So-Yun,Lee, Heejoo,Park, Jihun,Choi, Kwang-Hyuk,Kim, Han-Ki,Kim, Dae-Gon,Lee, Dae-Young,Nam, SungWoo,Park, Jang-Ung American Chemical Society 2013 NANO LETTERS Vol.13 No.6
<P>Transparent electrodes that can remain electrically conductive and stable under large mechanical deformations are highly desirable for applications in flexible and wearable electronics. This paper describes a comprehensive study of the electrical, optical, and mechanical properties of hybrid nanostructures based on two-dimensional graphene and networks of one-dimensional metal nanowires, and their use as transparent and stretchable electrodes. Low sheet resistance (33 Ω/sq) with high transmittance (94% in visible range), robust stability against electric breakdown and oxidation, and superb flexibility (27% in bending strain) and stretchability (100% in tensile strain) are observed, and these multiple functionalities of the hybrid structures suggest a future promise for next generation electronics. The use of hybrid electrodes to fabricate oxide semiconductor transistors and single-pixel displays integrated on wearable soft contact lenses with in vivo tests are demonstrated.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2013/nalefd.2013.13.issue-6/nl401070p/production/images/medium/nl-2013-01070p_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl401070p'>ACS Electronic Supporting Info</A></P>