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High-Performance Computation Using a Single-Flux Quantum Accelerator
Farhad Mehdipour,Hiroaki Honda,Hiroshi Kataoka,Koji Inoue,Kazuaki Murakami 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
A large-scale reconfigurable data-path (LSRDP) processor based on single-flux quantum circuits has been proposed to overcome the barriers originating from the CMOS technology. LSRDP is integrated to a general purpose processor in a high-performance computing system to accelerate the execution of data flow graphs extracted from scientific applications. The LSRDP micro-architecture and its specifications will be presented in this paper. A preliminary performance evaluation of the reconfigurable processor will be given as well.
Fluorescence Thermometer Based on Photoluminescence Imaging of Ti Doped Sapphire
Toru Katsumata,Takashi Honda,Megumi Watabiki,Hiroaki Aizawa,Koichi Otsubo,Shuji Komuro 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Photoluminescence (PL) images from Ti doped sapphire (Ti doped Al2O3) crystals are observed for 2-dimensional fluorescence thermometer applications. Red colored bright PL images can be observed clearly from Ti doped sapphire sensor using a CCD camera under blue LED illumination. Intensity of red signal of the PL image decreases linearly with temperature of the sensor. Ti doped sapphire sensor is found to be useful for fluorescence temperature measurement using PL imaging technique.
Cao, Linlin,Watanabe, Satoshi,Honda, Hironori,Yoshimura, Hiroaki,Furukawa, Akinori Korean Society for Fluid machinery 2014 International journal of fluid machinery and syste Vol.7 No.4
As a high specific speed pump, the contra-rotating axial flow pump with two rotors rotating reversely has been proved with higher hydraulic and cavitation performance, while in our previous researches, the potential interaction between two blade rows was distinctly observed for our prototype rotors designed with equal rotational speed for both front and rear rotors. Based on the theoretical and experimental evidences, a rotational speed optimization methodology was proposed and applied in the design of a new combination of contra-rotating rotors, primarily in expectation of the optimized blade pressure distributions as well as pertinently improved hydraulic performances including cavitation performance. In the present study, given one stationary and two rotating frames in the contra-rotating rotors case, a pressure measurement concept taking account of the revolutions of both front and rear rotors simultaneously was adopted. The casing wall pressure data sampled in time domain was successfully transferred into space domain, by which the ensemble averaged blade-to-blade pressure distributions at the blade tip of two contra-rotating rotors under different operation conditions were studied. It could be seen that the rotor pair with the optimized rotational speed combination as well as work division, shows more reasonable blade-to-blade pressure distribution and well weakened potential interaction. Moreover, combining the loading curves estimated by the measured casing wall pressure, the cavitation performance of the rotor pairs with new rotational speed combination were proved to be superior to those of the prototype pairs.
Fluorescence Thermometer Based on Luminescence Imaging of Garnet Sensor
Nobuyuki Hanami,Toru Katsumata,Hiroaki Aizawa,Mitsuo Honda,Masayuki Shibasaki,Koichi Otsubo,Shuji Komuro 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Red colored photoluminescence (PL) images have been observed from Cr doped garnet, Y3Al5O12 (YAG) sensor using a CCD camera system. PL image from YAG sensor increases linearly with temperature from 25 to 250 oC. Temperature can be measured using PL image from Cr doped YAG sensor. Image processing techniques, such as line scanning, histogram and integration of brightness are effective for two-dimensional fluorescence thermometer application.
Linlin Cao,Satoshi Watanabe,Hironori Honda,Hiroaki Yoshimura,Akinori Furukawa 한국유체기계학회 2014 International journal of fluid machinery and syste Vol.7 No.4
As a high specific speed pump, the contra-rotating axial flow pump with two rotors rotating reversely has been proved with higher hydraulic and cavitation performance, while in our previous researches, the potential interaction between two blade rows was distinctly observed for our prototype rotors designed with equal rotational speed for both front and rear rotors. Based on the theoretical and experimental evidences, a rotational speed optimization methodology was proposed and applied in the design of a new combination of contra-rotating rotors, primarily in expectation of the optimized blade pressure distributions as well as pertinently improved hydraulic performances including cavitation performance. In the present study, given one stationary and two rotating frames in the contra-rotating rotors case, a pressure measurement concept taking account of the revolutions of both front and rear rotors simultaneously was adopted. The casing wall pressure data sampled in time domain was successfully transferred into space domain, by which the ensemble averaged blade-to-blade pressure distributions at the blade tip of two contra-rotating rotors under different operation conditions were studied. It could be seen that the rotor pair with the optimized rotational speed combination as well as work division, shows more reasonable blade-to-blade pressure distribution and well weakened potential interaction. Moreover, combining the loading curves estimated by the measured casing wall pressure, the cavitation performance of the rotor pairs with new rotational speed combination were proved to be superior to those of the prototype pairs.
Thermal-Imaging of Foods in Heating Process
Chieko Nakayama,Yu Ikegaya,Toru Katsumata,Hiroaki Aizawa,Mitsuo Honda,Masayuki Shibasaki,Koichi Otsubo,Shuji Komuro 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Thermal imaging technique is useful for detecting 2-dimensional spatial distribution and temporal variation of temperature. Thermal images of foods during the cooking process and/or pulse heating process are observed for evaluating the quality of foods in the volume fabrications. Inhomogeneous temperature distribution of a pancake can be observed during the baking process. Water concentration of flour can be measured from temporal evaluation of thermal images.
Photoluminescence Imaging of Luminous Paint for Surface Temperature Monitoring
Hirotaka Kasai,Yoshihiro Kameyama,Toru Hagiwara,Daisuke Ishikawa,Toru Katsumata,Hiroaki Aizawa,Mitsuo Honda,Masayuki Shibasaki,Koichi Otsubo,Shuji Komuro 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Temperature monitoring is essentially important for stable control of fabrication processes. In order to develop a convenient 2-dimensional temperature monitoring system using a thermo-paint, photoluminescence (PL) images are observed from the luminous paints at various temperatures. Commercially available and in-house modified luminous paints are evaluated for improving temperature sensitivity and stability of the thermo-paints. Temperature dependences of PL images from various luminous paints are reported for developing temperature monitoring procedure using a thermo-paint.
Fabrication of Spinel Sensor for Fluorescence Thermometer
Daisuke Ishikawa,Toru Hagiwara,Hirotaka Kasai,Hajime Kunieda,Toru Katsumata,Hiroaki Aizawa,Mitsuo Honda,Masayuki Shibasaki,Koichi Otsubo,Shuji Komuro 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Spinel crystals (Cr doped MgAl2O4) with various Cr2O3 and MgO concentrations are grown using floating zone technique for fluorescence thermometer application. Temperature dependence of photoluminescence (PL) intensity is evaluated using spinel crystal and/or composite of spinel with silicone resin. PL intensity from spinel crystal and composite decreases linearly with temperature. Spenel crystal and composite are useful as sensor materials in fluorescence thermometer.