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Metarrhizium anisopliae(Metschn.) Sorok이 생산하는 Biopolymer YU-122의 생산과 그 특성
최용석,옥승호,유주현,배동현 한국산업미생물학회 1997 한국미생물·생명공학회지 Vol.25 No.1
토양으로부터 분리한 Metarrhizium anisopliae (Metschn.) Sorok이 생산하는 biopolymer를 정제하여 분석하고, 그의 생산조건을 검토하였다. 탄소원으로 mannitol, 질소원으로는 polypepton을 사용했을 때 가장 많은 biopolymer를 생산하였고 K_2HPO_4 및 CaCl_2를 첨가함으로서 생산량이 더욱 증가하였다. 또한 이 biopolymer를 정제하여 그 분자량과 구성성분을 검토한 결과 Metarrhizium anisopliae(Metschn.) Sorok이 생산하는 Biopolymer YU-122는 분자량이 1.7×10 exp (6)이고, C, H의 구성비가 1:2이며 미량의 N이 검출되었으나, 주 구성성분은 glucose와 galactose의 환원당으로 이루어져있는 전혀 새로운 biopolymer인 것으로 나타났다. To produce biopolymer, Metarrhizium anisopliae (Metschn.) Sorok was cultured in a medium containing glucose 1.0%, sucrose 2.0%, soluble starch 1.0%, yeast extract 0.5%, polypeptone 0.5%, K_2HPO_4 0.1%, MgSO_4·7H_2O 0.02%. The culture broth was centrifuged and the polymer was harvested by adding methanol to the culture supernatant. When three times of methanol was added, the polymer was coagulated and precipitated. Then it was further purifued through successive SK-1B, SA-20P, HP-20 column chromatographies. This polymer was designated as Biopolymer YU-122. C:H ratio of this Biopolymer YU-122 was 1:2 and small amount of N is detected by CHN analyzer. Glucose and galactose are main components of this polymer. Average molecular weight of this biopolymer was 1.7×10 exp (6) by Sepharose 4B gel permeation chromatography. Optimal condition for biopolymer production was investigated. When 5% of mannitol was used as a carbon source, and polypepton as a N source, highest productivity of biopolymer was achieved. C/N ratio as nutrient was also a major factor in polymer production and its optimal ratio was 3.
The Hand Mouse: Hand Detection and Hand Tracking
Bai yu,Jae-Ho Shin,Eung-Joo Lee 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
In this paper, we present a novel method of hand detection and improve the CAMSHIFT algorithm for hand tracking. We first detect the hand by using YCbCr hand-color likelihood. It is based the nature of skin color clustering in the distribution of CbCr and the maximum likelihood principle. Then, the detect result is applied to hand tracking by using CAMSHIFT algorithm. We have improved the formula of the search window to suitable for hand. Finally we carried out experiments on a Windows XP system and achieved good tracking results.
Yu-Hang Wang,Qi Tang,Mei-Ni Su,Ji-Ke Tan,Wei-Yong Wang,Yong-Sen Lan,Xiao-Wei Deng,Yong-Tao Bai,Wei Luo,Xiao-Hua Li,Jiu-Lin Bai 국제구조공학회 2021 Steel and Composite Structures, An International J Vol.38 No.1
Post-earthquake fire is a common disaster which causes serious safety issues to infrastructures. This study aims to investigate the residual loading capacities of circular concrete-filled steel tube (CFST) columns under post-earthquake fire experimentally and numerically. The experimental programme contains two loading steps - pre-damage cyclic loading at room temperature and transient state tests with constant compression loads. Three finite element models are developed and validated against the test results. Upon validation, a total of 48 numerical results were generated in the parametric study to investigate the effects of thickness and strengths of steel tube, axial compression ratio and damage degree on the fire resistance of circular CFST columns. Based on the analysis on experimental and numerical results, the loading mechanism of circular CFST columns is discussed. A design method is proposed for the prediction of fire resistance time under different seismic pre-damage and compression loads. The predictions by the new method is compared with the newly generated experimental and numerical results and is found to be accurate and consistent with the mean value close to the unity and a coefficient of variation around 1%.
Bai, Yu,Park, Il Song,Park, Hyeoung Ho,Lee, Min Ho,Bae, Tae Sung,Duncan, Warwick,Swain, Michael John Wiley Sons, Ltd. 2011 Surface and interface analysis Vol.43 No.6
<P><B>Abstract</B></P><P>Well‐ordered TiO<SUB>2</SUB> nanotubes were prepared by the electrochemical anodization of titanium in an ethylene glycol electrolyte containing 1 wt% NH<SUB>4</SUB>F and 10 wt% H<SUB>2</SUB>O at 20 V for 20 min, followed by annealing. The surface morphology and crystal structure of the samples were examined as a function of the annealing temperature by field emission scanning electron microscopy (FE‐SEM) and X‐ray diffraction (XRD), respectively. Crystallization of the nanotubes to the anatase phase occurred at 450 °C, while rutile formation was observed at 600 °C. Disintegration of the nanotubes was observed at 600 °C and the structure vanished completely at 750 °C. Electrochemical corrosion studies showed that the annealed nanotubes exhibited higher corrosion resistance than the as‐formed nanotubes. The growth of hydroxyapatite on the different TiO<SUB>2</SUB> nanotubes was also investigated by soaking them in simulated body fluid (SBF). The results indicated that the tubes annealed to a mixture of anatase and rutile was clearly more efficient than that in their amorphous or plain anatase state. The <I>in vitro</I> cell response in terms of cell morphology and proliferation was evaluated using osteoblast cells. The highest cell activity was observed on the TiO<SUB>2</SUB> nanotubes annealed at 600 °C. Copyright © 2010 John Wiley & Sons, Ltd.</P>
HAND POSTURE RECOGNITION BASED ON SVM USING ON MOBILE PHONE
Bai yu,Sang-Yun Park,Eung-Joo Lee 한국멀티미디어학회 2009 한국멀티미디어학회 학술발표논문집 Vol.2009 No.2
In this paper, we present a novel method of hand posture recognition using on telephone. In this algorithm, we first detect the hand areas by used YCbCr skin-color likelihood algorithm. It is based the nature of skin color clustering in the distribution of CbCr and the maximum likelihood principle. Secondly we correct 300 hundred hand posture pictures which are transform to gray level to training the system by using Support Vector Machines (SVM) algorithm. And we will get the characteristic vectors of hand postures which are saved in hand-gesture.xml file. Thirdly we use the characteristic vectors compare with the detected hand areas by SVM to recognize hand postures. Finally we carried out a simulation experiment on a Windows XP system to evaluate the efficiency of the proposed algorithm. It can be seen from the experimentation that the system can achieve good recognition results.
Possible Applications for Fascial Anatomy and Fasciaology in Traditional Chinese Medicine
Yu Bai,소광섭,Byung-Cheon Lee,Yong Huang,Chun-lei Wang,Jun Wang,Jin-peng Wu,Jing-xing Dai,Janos Palhalmi,Ou Sha,David Tai Wai Yew,Lin Yuan 사단법인약침학회 2010 Journal of Acupuncture & Meridian Studies Vol.3 No.2
Research using medical imaging instruments such as computed tomography and magnetic resonance imaging has led to the proposal that the fascial network distributed over the human body is the anatomical basis for the acupoints and meridians of traditional Chinese medicine. Therefore, we put forward a new theory of anatomy called fascial anatomy. In fascial anatomy, a human body is divided into two major systems. One is the supporting-storing system of unspecialized connective tissues. The other is a functional system. An undifferentiated non-specific connective tissue network, with the participation of the nervous and the immune systems, constitutes the supporting-storing system of the human body. The various differentiated functional cells in the body that are supported and surrounded by the supporting-storing system constitute the functional system. The discipline that studies the supporting-storing system and the mutual relationship between this system and the functional system in a living human body is called fasciaology. The establishment of fascial anatomy and fasciaology opens a new research field in anatomy; consequently, fasciaology will play a significant role in biological medicine and traditional Chinese medical research, as well as future clinical practice.