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8th International Workshop on Applied Parallel Computing, PARA 2006

作者： Sakurai, Tetsuya Kodaki, Yoshihisa Tadano, Hiroto Umeda, Hiroaki Inadomi, Yuichi Watanabe, Toshio Nagashima, Umpei Department of Computer Science University of Tsukuba Tsukuba 305-8573 Japan Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba 305-8573 Japan Core Research for Evolutional Science and Technology Japan Science and Technology Agency Japan Computational Science Research Division National Institute of Advanced Industrial Science and Technology Computing and Communications Center Kyushu University Fukuoka 812-8581 Japan

ISBN: (纸本)9783540757542

We consider a parallel method for solving generalized eigen-value problems that arise from molecular orbital computations. We use a moment-based method that finds several eigenvalues and their corresponding eigenvectors in a given domain, which is suitable for master-worker type parallel programming models. The computation of eigen-values using explicit moments is sometimes numerically unstable. We show that a Rayleigh-Ritz procedure can be used to avoid the use of explicit moments. As a test problem, we use the matrices that arise in the calculation of molecular orbitals. We report the performance of the application of the proposed method with several PC clusters connected through a hybrid MPI and GridRPC system. © Springer-Verlag Berlin Heidelberg 2007.

关键词： Computation theory

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Angle-dispersion compensation and phase characterization of multiple CARS signals in LiNbO3 towards extremely-short optical pulse generation

Angle-dispersion compensation and phase characterization of ...

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Conference on Lasers and Electro-Optics Europe (CLEO EUROPE)

作者： Eiichi Matsubara Ryuji Morita Taro Sekikawa Mikio Yamashita Department of Applied Physics Core Research for Evolutional Science and Technology Japan Science and Technology Agency Hokkaido University Sapporo Japan

The purpose of this study is to generate sub-femtosecond class optical pulses using multiple coherent anti-Stokes Raman scattering (CARS) signals in solids at room temperature.

关键词： Optical pulse generation Signal generators Optical pulses Pulse measurements Physics Solids Temperature Optical refraction Pulse amplifiers Pulse generation

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Free-space continuous-variable quantum cryptography

Free-space continuous-variable quantum cryptography

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International Quantum Electronics Conference, IQEC 2007

作者： Tokunaga, Shingo Shirasaki, Kazuya Hirano, Takuya Department of Physics Gakushuin University 1-5-1 Mejiro Toshima-ku Tokyo 171-8588 Japan Core Research for Evolutional Science and Technology 1-9-9 yaesu Chuo-ku Tokyo 103-0028 Japan

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ISBN: (纸本)1424409306

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Surface vibrations of TiO2 in liquids observed by fourth-order Raman spectroscopy

Surface vibrations of TiO2 in liquids observed by fourth-ord...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Tomonori Nomoto Hiroshi Onishi Department of Chemistry Faculty of Science Kobe University Kobe Japan Core Research for Evolutional Science and Technology Japan Science and Technology Agency Kawaguchi Japan

We present fourth-order Raman spectra of a TiO 2 surface immersed in different liquids. Although an undesired optical process occurs in some liquids covering the interface, phonon modes localized at the liquid-TiO 2 ... 详细信息

ISBN: (纸本)1424411742

关键词： Spectroscopy Probes Optical surface waves Raman scattering Liquids Optical filters Optical pulse generation Pulse amplifiers Nonlinear optics Optical pumping

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Improvement of the XANAM system and acquisition of a peak signal with a high S/N ratio

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Journal of Physics: Conference Series 2007年第1期61卷 1117-1121页

作者： Suzuki, S. Nakamura, M. Kinoshita, K. Koike, Y. Fujikawa, K. Matsudaira, N. Chun, W.-J. Nomura, M. Asakura, K. Catalysis Research Center Department of Quantum Science and Technology Hokkaido University Kita-ku Sapporo 001-0021 N21W10 Japan Japan Science and Technology Agency Core Research for Evolutional Science and Technology Kita-ku Sapporo 001-0021 N21W10 Japan Photon Factory Institute of Material Structure Science High-Energy Accelerator Organization Tsukuba Ibaraki 305-0801 Japan Oho 1-1 Japan

We have made remarkable progress in detecting X-ray-induced frequency shift signals, which will promote development of a chemically sensitive NC-AFM. A highperformance controller provides a tenfold higher signal to noise ratio than that previously reported. We confirmed that the frequency shift or complementary Z-feedback signal dependence on X-ray energy has a peak. An important feature of the signal is that it does not follow the absorption spectrum of a surface element. These new findings are important to elucidate this novel X-ray-induced phenomenon. © 2007 IOP Publishing Ltd.

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On - Chip Multi Wavelength Detection Sensor for Real Time Monitoring of Fluorescence and Opacity

On - Chip Multi Wavelength Detection Sensor for Real Time Mo...

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International Conference on Solid State Sensors and Actuators (TRANSDUCERS)

作者： Y. Maruyama K. Sawada H. Takao M. Ishida Department of Electrical and Electronic Engineering Toyohashi University of Technology Toyohashi Japan Intelligent Sensing System Research Center Toyohashi Japan Core Research for Evolutional Science and Technology (CREST) Japan Department of Electrical and Electronic Engineering Intelligent Sensing System Research Center Core Research for Evolutional and Technology (CREST) Toyohashi University of Technology Toyohashi Japan

In this paper simultaneous detection of fluorescence and turbidity using on-chip multi wavelength detection sensor was reported. The sensor was fabricated in 5μm, single-poly, double-metal, p-well CMOS technology. At first, the capability of fluorescence and turbidity were confirmed. In the experiment of fluorescence detection, concentrations down to 37.5nM have reliably been measured. In the experiment of turbidity detection, the comparable results with Si photodiode were detected. Finally, the sensor was applied for real time monitoring of a Loop-Mediated Isothermal Amplification Method (LAMP). The fluorescence and turbidity change were successfully observed.

关键词： Monitoring Fluorescence CMOS technology DNA Intelligent sensors Optical scattering Sensor systems System-on-a-chip Wavelength measurement Isothermal processes

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Free-space continuous-variable Quantum Cryptography

Free-space continuous-variable Quantum Cryptography

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Conference on Lasers and Electro-Optics Europe (CLEO EUROPE)

作者： Shingo Tokunaga Kazuya Shirasaki Takuya Hirano Department of Physics Gakushuin University Toshima-ku Tokyo Japan Core Research for Evolutional Science and Technology Chuo-ku Tokyo Japan

Free-space quantum key distribution (QKD) is expected to realized a global system for QKD based on a network of ground to satellite or satellite to satellite, and thus to extend the distance limit and the utility of QKD method (Schmitt-Manderbach et al., 2007). We report an experimental demonstration of free-space continuous-variable QKD (CV-QKD). We use a 1.55 m-wavelength pulsed diode laser and a pulsed homodyne detector. We have demonstrated free-space CV-QKD using a novel collinear interferometer. Our result shows the feasibility of practical free-space CV-QKD. We believe it will be an important step for the future study of free-space CV-QKD.

关键词： Cryptography Birefringence Photonic crystals Satellites Optical pulses Optical interferometry Electrons Pulse measurements Diode lasers Rayleigh scattering

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Analysis of errors in an optical Controlled-NOT gate with a high-precision testing bed

Analysis of errors in an optical Controlled-NOT gate with a ...

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Conference on Lasers and Electro-Optics Europe (CLEO EUROPE)

作者： Tomohisa Nagata Ryo Okamoto Holger F. Hofmann Shigeki Takeuchi Keiji Sasaki Research Institute for Electronic Science Hokkaido University Sapporo Japan Core Research for Evolutional Science and Technology Japan Science and Technology Agency Japan Graduate School of Advanced Sciences of Matter Hiroshima University Hiroshima Japan

In our paper, we report the analysis of errors in the C-NOT gate using a high-precision test-bed. From the result of previous experiment, we have identified two main causes of errors: one is the mismatch between optical modes, and the other is the un-intentional phase shift between two polarization, horizontal polarizations and vertical polarization. To evaluate these factors more precisely, we construct a test-bed setup in which piezo-electric stages are used to avoid mode mismatch, and the extinction ratio of polarization is kept below 10 -3 . In the poster, we will report the experimental results with the test-bed and the analysis of errors in detail.

关键词： Optical control Error analysis Error correction Optical polarization Quantum computing Interference Electronic equipment testing Photonics Optical computing Robust control

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Preparation, crystal structure and thermoelectric properties of La2−2xCa1+2xMn2O7

Preparation, crystal structure and thermoelectric properties...

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International Conference on Thermoelectrics (ICT)

作者： Yuzuru Miyazaki Daisuke Abe Tsuyoshi Kajitani Department of Applied Physics Graduate School of Engineering Tohoku University Sendai Japan Core Research for Evolutional Science and Technology Japan Science and Technology Agency Chuo Tokyo Japan

We have prepared polycrystalline samples of the Ruddlesden-Popper La 2-2x Ca 1+2x Mn 2 O 7 phase and determined their crystal structure and thermoelectric properties above room temperature. Single-phase samples with tetragonal I4/mmm space group are obtained for the samples with 0.50 les x les 1.00; the corresponding valence state of Mn is from 3.5 to 4.0. With increasing x, the a-axis length gradually decreases from 3.8268(4) Aring (x = 0.5) to 3.7078(2) Aring (x = 1.0), while the c-axis length increases from 19.197(3) Aring(x = 0.5) to 19.438(1) Aring(x = 1.0). As expected, all the samples exhibit negative Seebeck coefficients, S. The absolute value of S increases with increasing x, and the phases become electrically conductive at high temperatures. For example, the sample with x = 0.50 exhibits the electrical conductivity, sigma = 35 S/cm and S = -40muV/K at 1123 K, compared with those of the sample with x = 0.95 of sigma = 18 S/cm and S = -175 muV/K. The highest ZT ~0.03 with the power factor of 5.5 x 10 -5 W/mK 2 , has been obtained for the x = 0.95 sample at 1123 K.

关键词： Thermoelectricity Tellurium Temperature Space technology Thermal conductivity X-ray diffraction Atomic measurements Powders X-ray scattering Conductivity measurement

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Comprehensive functional analyses of Arabidopsis transcription factors using the chimeric repressor gene silencing technology (CRES-T)

Comprehensive functional analyses of Arabidopsis transcripti...

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18th International Conference on Arabidopsis research(第十八届国际拟南芥大会)

作者： Masahito Shikata Tomotsugu Koyama Nobutaka Mitsuda Kyoko Matsui Yoshimi Umemura Akira Iwase Miho Ikeda Masaru Ohme-Takagi Research Institute of Ganome-based Biofactory Advanced Industrial Science and TechnologyCentral 4Tsukuba 305-8562Japan Core Research for Evolutional Science and Technology(CREST) Japan Science and Technology Agency(JST)Saitama 332-0012Japan Research Institute of Ganome-based BiofactoryAdvanced Industrial Science and TechnologyCentral 4Tsukuba 305-8562Japan

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