http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
New Method to Measure the Rise Time of a Fast Pulse Slicer for Laser Ion Acceleration Research
Mori, Michiaki,Yogo, Akifumi,Kiriyama, Hiromitsu,Nishiuchi, Mamiko,Ogura, Koichi,Orimo, Satoshi,Ma, Jinglong,Sagisaka, Akito,Kanazawa, Shuhei,Kondo, Shuji,Nakai, Yoshiki,Akutsu, Atsushi,Yamamoto, Yoic IEEE 2008 IEEE transactions on plasma science Vol.36 No.4
<P> A dependence of cutoff proton kinetic energy on laser prepulse duration has been observed. Amplified spontaneous emission pedestal duration is controlled by a fast electrooptic pulse slicer where the rise time is estimated to be 130 ps. We demonstrate a new correlated spectral technique for determining this rise time using a stretched frequency-chirped pulse. </P>
Tae Moon Jeong,Akifumi Yogo,Akito Sagisaka,고도경,Hiroyuki Daido,김형택,최일우,Jae Hee Sung,Jongmin Lee,Jung Hoon Kim,Kyung-Han Hong,유태준,Young-Chul Noh 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.50 No.1I
The characteristics of the preplasma, such as the electron density and its profile, were investigated from a measurement of the phase shift due to the preplasma in an experiment on high energy proton beam generation. The electron density and its profile were calculated from the measured phase shifts, and their dependences on the prepulse intensity and the time delay were investigated. Although the size of the electron density depended on the prepulse intensity, the maximum electron density ranged from 1.5 × 1019 to 2.1 × 1019 cm.3, irrespective of the prepulse intensity and the time delay in the picosecond range. The analysis showed that a preplasma having an electron density of 1019 cm.3 existed on a target before the main laser pulse arrived at the target for the generation of high energy proton beams.
Development of CAD for Zone Dividing of Process Control Networks to Improve Cyber Security
Hiroki Moritani,Shuichi Yogo,Takahito Morita,Midori Kojima,Kento Watanabe,Jing Sun,Ichiro Koshijima,Yoshihiro Hashimoto 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10
Recently, cyber security becomes a serious problem for not only OA (Office Automation) systems but also PA (Process Automation) and FA (Factory Automation) systems. Even the controllers, which are not connected to Internet directly, have been attacked with malwares, such as Stuxnet and Quantum. When control system fails, it may lead to serious accidents such as explosion or leakage of poisonous and deleterious substances. For process control, cyber-attack is one of the causes to threaten safety. The authors of this paper had proposed zone division of process control networks to ensure cyber security and safety. To apply the method, it is necessary to build CE (Cause Effect) matrices which express the qualitative information of the plant and controllers. It is very troublesome for large-scale plants. CAD (Computer Aided Design) tool for zone dividing is proposed in this paper. CE matrices are generated by using DAE (Differential and Algebraic Equation) registered in equipment modules of plant CAD such as ASPEN or Pro II. The candidates of zone division of process control networks, which can assure the safety against concealment and remote operation by cyber attackers, can be proposed.
The Production of Xylitol by Enzymatic Hydrolysis of Agricultural Wastes
Kazuhiro Takamizawa,Lien Ha Tran,Masanori Yogo,Hiroshi Ojima,Keiichi Kawai,Tohru Suzuki,Osamu Idota 한국생물공학회 2004 Biotechnology and Bioprocess Engineering Vol.9 No.3
Agricultural waste products, beech wood and walnut shells, were hydrolyzed at 40oC using mixed crude enzymes produced by Penicillium sp. AHT-1 and Rhizomucor pusillus HHT-1. D-xylose, 4.1 g and 15.1 g was produced from the hydrolysis of 100 g of beech wood and walnut shells, respectively. For xylitol production, Candida tropicalis IFO0618 and the waste product hydrolyzed solutions were used. The effects on xylitol production, of adding glucose as a NADPH source, D-xylose and yeast extract, were examined. Finally, a 50% yield of xylitol was obtained by using the beech wood hydrolyzed solution with the addition of 1% yeast extract and 1% glucose at an initial concentration.
고체상추출과 LC-MS/MS 이용에 의한 제초제 잔류분석 특성
황재복(Hwang Jae Bok),Takashi Iwafune,Yasuhiro Yogo,이용환(Yong Hwan Lee),박창영(Chang Young Park),박성태(Sung Tae Park) 韓國雜草學會 2009 Weed&Turfgrass Science Vol.29 No.2
HLB 컬럼에서의 첨가회수율은 benfuresate, bentazone, bromobutide, cafenstrole, imazosulfuron, pyrazoxyfen, quinoclamine, 그리고 thiobencrab 제초제가 70% 이상이었으나, cyhalofop-bytyl, molinate, 그리고 pentoxazone 제초제는 32~64%로 낮게 회수되었다. PS-2 컬럼에서의 회수율은 bentazone, imazosulfuron는 거의 회수되지 않았고, benfuresate, bromobutide, cafenstrol, pentoxazone, quinoclamine, thiobencarb, cyhalofop-buthyl, 그리고 molinate 제초제는 57~87% 정도로 회수되었다. 변이계수는 HLB 컬럼에서 1~6% 정도이었고, PS-2 컬럼에서는 1~13%이었다. A comparative study was undertaken to find out the optimum solid-phase extraction (SPE) of water samples for 10 herbicide residues. Two polymer-based sorbents, balanced copolymer of lipophilic divinylbenzene monomer and hydrophilic N-vinylpyrrolidone monomer (HLB) and polystyrene-divinylbenzene copolymer (PS-2) cartridges, were investigated for extraction efficiency of neutral and weak ionic herbicide residues from water sample. Each SPE cartridges was activated by water-miscible solvents, washed with water, and then loaded with 400 to 1,000 mL of water samples containing herbicides. The trapped residue was eluted with acetonitrile and dichloromethane for HLB and PS-2 cartridges, respectively, and followed by determination using triple quadrupole LC/MS in the selective-reaction monitoring mode. Electrospray ionization was successfully applied to form positive or negative molecular ions of target analytes, and product ions derived from the precursor ions were selectively detected. Mean recoveries of HLB extraction were more than 70% except molinate cyhalofop-butyl and pentoxazone showing poor recovery of 32~64%. In PS-2 extraction, bentazone and imazosulfuron were not trapped, while recoveries of other herbicides ranged 57~87%. Relative standard deviations of two methods were in the range of 1~6% and 1~13% HLB and PS-2 cartridge, respectively. According to herbicides properties, each sorbents could be selectively employed for extraction of herbicide residues from water samples. The proposed method was simple to operate and highly specific being coupled with tandem mass spectrometric quantitation.
Characterization of an Intense Laser-Produced Preformed Plasma for Proton Generation
A Sagisaka,A. Noda,A. Fukumi,A. Yogo,A. S. Pirozhkov,H. Daido,K. Nemoto,K. Ogura,M. Nishiuchi,M. Mori,M. Kado,S. Orimo,S. Nakamura,T. Nayuki,T. Shirai,T. Fujii,Y. Oishi,Y. Hayashi,Y. Iwashita,Z. Li 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.I
High-energy protons are generated with a 3-μm-thick tantalum target irradiated with a highintensity laser under the preformed plasma condition. We observe the electron density distributions of preformed plasmas with two-color probe beams as interferometers. The preformed plasma at the front side of the target is generated by pre-pulses of a high-intensity Ti:sapphire laser. In this preformed plasma condition, the maximum proton enegy is 900 keV. The half angle of the generated proton beam (>500 keV) is about 10.
Chalcone suppresses lignin biosynthesis in illuminated soybean cells
Chen, Wei-Jun,Yun, Min-Soo,Deng, Fan,Yogo, Yasuhiro The Korean Society of Weed Science and The Turfgra 2011 Weed Biology and Management Vol.11 No.1
Lignin and its related metabolites play critical roles in plant growth and development. Thus, lignin biosynthesis has attracted interest as a novel target site of plant growth inhibitors. Chalcone has been shown to not only inhibit lignin biosynthesis in plants, but also to suppress the growth of many annual plant species. In order to know the direct effect of chalcone on plant metabolism, the effects of chalcone on the activities of key enzymes in lignin biosynthesis and on the related metabolites were clarified with a time-course study by using light-induced suspension cultures of soybean cells.The fresh weight and packed cell volume of the soybean cells were inhibited after 8 h of chalcone treatment. The activities of phenylalanine ammonia lyase (EC 4.3.1.24) and 4-coumarate: coenzyme A ligase (4CL; EC 6.2.1.12) were largely inhibited 4 h after the treatment with 0.15 $mmol\;L^{-1}$ chalcone. Unlike these two enzymes, the activity of cinnamyl alcohol dehydrogenase (EC 1.1.1.195) was not inhibited until 16 h after the chalcone treatment. The content of the 4CL substrates and lignin in the soybean cells became relatively lower than the control under the light condition within 4 h and 8 h after the chalcone treatment, respectively. These results suggest that the growth suppression of soybean cells is positively associated with the inhibition of lignin biosynthesis by exogenous chalcone.
Development of Laser-driven Proton Source Toward Its Applications
Akito Sagisaka,Hiroyuki Daido,Alexander S. Pirozhkov,Akifumi Yogo,Koichi Ogura,Satoshi Orimo,Jinglong Ma,Michiaki Mori,Mamiko Nishiuchi,Sergei V. Bulanov,Timur Zh. Esirkepov,Yuji Oishi,Takuya Nayuki,T 한국광학회 2009 Current Optics and Photonics Vol.13 No.1
We observe the proton signals produced by laser interaction with thin-foil targets of polyimide and of copper. We change the thickness of the polyimide target to 7.5 μm, 12.5 μm, and 50 μm. High-energy protons with the maximum energy of ~2.3 MeV from 7.5 μm thick polyimide are observed. This proton beam with the maximum energy of multi-MeV has various applications such as a proton shadowgraphy.