X-Ray Spectral Variability of the Seyfert Galaxy NGC 4051 Observed with Suzaku (2008)
Terashima, Y., Gallo, L. C., Inoue, H., Markowitz, A. G., Reeves, J. N., Anabuki, N., ...
We report results from a Suzaku observation of the narrow-line Seyfert 1 NGC 4051. During our observation, large amplitude rapid variability is seen and the averaged 2--10 keV flux is 8.1x10^-12 erg...
Critical conditions of bed sediment entrainment due to debris flow (2008)
Papa, M., Egashira, S., Itoh, T.
The present study describes entrainment characteristics of bed material into debris flow, based on flume tests, numerical and dimensional analyses. Flume tests are conducted to investigate influences...
Critical conditions of bed sediment entrainment due to debris flow (2008)
Papa, M., Egashira, S., Itoh, T.
The present study describes entrainment characteristics of bed material into debris flow, based on flume tests, numerical and dimensional analyses. Flume tests are conducted to investigate influences...
M. S. Sasaki, T. Nomura, Y. Ejima, H. Utsumi, S. Endo, I. Saito, ...
Sasaki, M. S., Nomura, T., Ejima, Y., Utsumi, H., Endo, S., Saito, I., Itoh, T. and Hoshi, M. Experimental Derivation of Relative Biological Effectiveness of A-Bomb Neutrons in Hiroshima and Nagasaki...
T. Martin, P. F. Guillet, M. Coosemans, T. Itoh, M. Akogbéto, ...
The efficacy of an experimental long-lasting insecticide-treated hammock (LLIH) with a long-lasting treated net used as a blanket and made of the same fabric (polyethylene) was tested in a concrete...
Cabrera, M. E., Eizuru, Y., Itoh, T., Koriyama, C., Tashiro, Y., Ding, S., ...
Publicación ISI
Cabrera, M. E., Eizuru, Y., Itoh, T., Koriyama, C., Tashiro, Y., Ding, S., ...
Publicación ISI
Hard X-ray Detector (HXD) on Board Suzaku (2006)
Takahashi, T., Abe, K., Endo, M., Endo, Y., Ezoe, Y., Fukazawa, Y., ...
The Hard X-ray Detector (HXD) on board Suzaku covers a wide energy range from 10 keV to 600 keV by combination of silicon PIN diodes and GSO scintillators. The HXD is designed to achieve an extremely...
In-Orbit Performance of the Hard X-ray Detector on board Suzaku (2006)
Kokubun, M., Makishima, K., Takahashi, T., Murakami, T., Tashiro, M., Fukazawa, Y., ...
The in-orbit performance and calibration of the Hard X-ray Detector (HXD) on board the X-ray astronomy satellite Suzaku are described. Its basic performances, including a wide energy bandpass of...
Salivary chromogranin A as a measure of stress response to noise (2006)
Miyakawa, M, Matsui, T, Kishikawa, H, Murayama, R, Uchiyama, I, Itoh, T, ...
Kawai, H., Itoh, T., Keedy, D. A., Stein, R. S.
Dynamic birefringence measurements on crystalline polymers such as polyethylene indicate that there is a characteristic time for change in molecular orientation. This time has been ascribed to that...
Liver biopsy interpretation for causes of late liver allograft dysfunction (2006)
Demetris, A. J., Adeyi, O., Bellamy, C. O. C., Clouston, A. D., Charlotte, F., Czaja, A., ...
Microwave Integrated Circuits, Electromagnetic Scattering, and Optical Data Processing. (2005)
Technical accomplishments in the various research projects sponsored by the Army Research Office under Grant No. DA-ARO-D-31-124-G77 are summarized. These projects include microwave integrated...
Monolithic millimeter-wave source incorporating planar surface wave assisted antenna (2004)
Radisic, V., Samoska, L., Qian, Y., Itoh, T.
A monolithic 120 GHz free-space, continuous-wave source capable of providing 10 dBm of EIRP at 11.1 percent DC-to-EIRP conversion efficiency is presented.
Critical conditions of bed sediment entrainment due to debris flow (2004)
The present study describes entrainment characteristics of bed material into debris flow, based on flume tests, numerical and dimensional analyses. Flume tests are conducted to investigate influences...
Review on the progress of the LHD experiment (2004)
Motojima, O., Yamada, H., Komori, A., Watanabe, K. Y., Mutoh, T., Takeiri, Y., ...
Recent progress in the Large Helical Device (LHD) experiment during the last 2 yr is reviewed. The LHD has been extending its operational regime toward fusion-relevant conditions while taking...
Reaction bonding of microstructured silicon carbide using polymer and silicon thin film (2004)
Rajanna, K, Tanaka, S, Itoh, T, Esashi, M
We report the successful bonding of microstructured Silicon carbide using the reaction between polymer layer and sputtered silicon thin film. The necessary steps and the process parameters have been...
Hierarchical order in a side-group liquid crystalline block copolymer (2003)
Ansari, IA, Castelletto, V, Mykhalylk, T, Hamley, IW, Lu, ZB, Itoh, T, ...
Barthou, C., Duong, P.H., Oliver, A., Cheang-Wong, J.C., Rodriguez-Fernandez, L., Crespo-Sosa, A., ...
Influence of oxygen on luminescence and vibrational spectra of Mg-doped GaN (2003)
Koide, Y, Walker, DE, White, BD, Brillson, LJ, Itoh, T, McCreery, RL, ...
High Power Wideband AlGaN/GaN HEMT Feedback Amplifier Module (2002)
Y. Chung, S. Cai, W. Lee, Y. Lin, C. P. Wen, K. L. Wang, ...
A high power wideband feedback amplifier module using AlGaN/GaN high electron mobility transistor (HEMT) has been developed that covers the frequency range of DC to 5 GHz with small signal gain of 9...
Kato, M, Itoh, T, Sugai, H, Kawamura, Y, Hayashi, T, Nishi, M, ...
Analysis of Modes in a Finite-Width Parallel-Plate Waveguide. (2002)
An efficient method has been developed for analyzing modal characteristics of a finite-width parallel-plate waveguide. The method is based on an extension of Galerkin's procedure applied in the...
A Study of Distributed Millimeter-Wave Isolators. (2002)
Nonreciprocal devices, such as circulators and isolators, are among the important devices for microwave and millimeter-wave communication systems. Two types of isolators which can be used at both...
Supported in part by contract DAAG29-81-K-0053.
Coplanar Schottky Variable Phase Shifter. (2002)
A coplanar Schottky variable phase shifter is studied. This device has a simple configuration and is suitable for monolithic integration. The device uses the electronic variability of the depletion...
Millimeter-Wave Travelling-Wave Impatt Diode. (2002)
A millimeter-wave travelling-wave IMPATT diode is studied. This device has a simple configuration and is suitable for monolithic integration. The travelling-wave structure permits oscillation of the...
Field Distribution in the Trapped Image Guide, (2002)
An efficient analytical method for accurate calculation of the field distribution in trapped image guide is presented. Based on the Weber-Schafheitlin integral, the method yields field distributions...
Inexpensive Short-Range Microwave Telemetry Transponder, (2002)
A microwave transponder is described which is suitable for short-range telemetry applications requiring an inexpensive transmitter. Two antiparallel beam-lead diodes at the terminals of a bow-tie...
By using a subharmonically pumped circuit in a quasi-optical planar mixer, we have found it possible to use an LO frequency of one-half the normal value with little added circuit complexity. This...
A Multiplying Slot Array. (2002)
In search of a high power millimeter wave source this paper describes a novel multiplying slot array with space combining capability. This device distributes the power of a fundamental oscillator to...
Nakase, H, Okazaki, K, Tabata, Y, Ozeki, M, Watanabe, N, Ohana, M, ...
Resonant excitation and anti-Stokes luminescence of GaAs single quantum dots (2001)
Edamatsu, K., Watatani, C., Itoh, T., Shimomura, S., Hiyamizu, S.
We have investigated micro-photoluminescence ($\mu$-PL) and excitation ($\mu$-PLE) spectra of a single GaAs/AlGaAs quantum dot grown on a GaAs (411)A surface. We observed sharp resonant lines in both...
PBG-Assisted Gain Enhancement of Patch Antennas on HighDielectric Constant Substrate (2001)
F. R. Yang, R. Coccioli, Y. Qian, T. Itoh
. The recently developed Uniplanar Compact PBG (UC-PBG) substrate is successfully used to reduce surface wave losses of a patch antenna on a high dielectric constant substrate. The surface wave...
A Reconfigurable Leaky Mode/Patch Antenna Controlled by PIN Diode Switches (2001)
this paper represents, for the first time, a fully electronically controlled reconfigurable aperture by using PIN diode switches.
A Broadband Quasi-Yagi Antenna Array (2001)
James Sor, W. R. Deal, Y. Qian, T. Itoh
A broadband quasi-Yagi X-Band antenna array with a fanbeam-pattern is presented. The bandwidth of the array (VSWR < 2.0) is found to be
A Novel TEM-Waveguide Using Uniplanar Compact Photonic Band-Gap (UC-PBG) Structure (2001)
Yang, F. R., Ma, K. P., Qian, Y., Itoh, T.
A novel TEM-waveguide using a photonic band-gap (PBG) structure is presented. The uniplanar compact PBG (UC-PBG) structure which realizes a magnetic surface in the stopband is used in the wave guide...
Takahata, K., Iguchi, Y., Tanaka, D., Itoh, T., Terasaki, I.
The thermal conductivity of polycrystalline samples of (Na,Ca)Co_2O_4 is found to be unusually low, 20 mW/cmK at 280 K. On the assumption of the Wiedemann-Franz law, the lattice thermal conductivity...
Characteristics of fritting contacts utilized for micromachined wafer probe cards (2000)
Itoh, T., Suga, T., Engelmann, G., Wolf, J., Ehrmann, O., Reichl, H.
Sakamoto, J, Sugiyama, J, Kimura, S, Imai, T, Itoh, T, Watanabe, T, ...
Formation and structure of artificial cellulose spherulites via enzymatic polymerization (2000)
Kobayashi, S, Hobson, LJ, Sakamoto, J, Kimura, S, Sugiyama, J, Imai, T, ...
Transport Properties in (Na,Ca)Co_2O_4 Ceramics (1999)
Itoh, T., Kawata, T., Kitajima, T., Terasaki, I.
The resistivity and thermopower of polycrystalline (Na,Ca)Co_2O_4 were measured and analyzed. Both the quantities increase with x, suggesting that the carrier density is decreased by the...
Na-site substitution effects of the thermoelectric properties of NaCo_2O_4 (1999)
Kawata, T., Iguchi, Y., Itoh, T., Takahata, K., Terasaki, I.
The resistivity and thermopower of Na$_{1+x}$Co$_2$O$_4$ and Na$_{1.1-x}$Ca$_x$Co$_2$O$_4$ are measured and analyzed. In Na$_{1+x}$Co$_2$O$_4$, whereas the resistivity increases with $x$, the...
An Efficient Method for Performing Karhunen-Loeve Transform for Image Coding. (1998)
Setoguchi,K., Mittra,R., Itoh,T.
An efficient method has been developed for performing the Karhunen-Loeve transform which is optimum for reducing the number of samples to be sent via a given channel for high fidelity picture...
An Isolator in Image Guide. (1998)
An image guide consisting of a layer of dielectric and a layer of ferrite with periodic metal strips between these layers is analyzed. Non-reciprocity of the phase constants caused by the gyrotropic...
A Study of Microwave and Millimeter-Wave Quasi-Optical Planar Mixers. (1998)
Quasi-optical mixers promise to simplify microwave and millimeter-wave receiving and remote sensing systems, especially where imaging of the field of view is desired. Two types of quasi-optical...
Analysis of Transmission Lines on Semiconductor Substrate. (1998)
An efficient numerical method based on the application of Galerkin's method in the spectal domain is proposed to obtain the propagation constant and characteristic impedance of planar transmission...
Computer-Aided Design of Millimeter Wave E-Plane Filters. (1998)
This study presents a computer-aided design algorithm developed for a class of E-plane waveguide filters. The filter structure is composed of an integrated finline circuit in a waveguide. The circuit...
Monolithic Phase Shifter Study. (1998)
Modeling and preliminary testing of a monolithic coplanar waveguide (CPW) phase shifter using both optical and Schottky-contact control techniques has been performed. Simulation work on a...
Monolithic Phase Shifter Study. (1998)
Modeling and testing of monolithic coplanar waveguide (CPW) phase shifters using both optical and Schottky-contact control techniques have been performed. Simulation work on a periodically...
New Trends and Ideas in the Fields of Microwave Technology, (1998)
This paper presents a subjective view toward new directions and some examples for changing microwave research. The paper is written primarily from the point of view of how the electromagnetic...
Extension of UCLA JSEP Program in Millimeter Wave Electronics (1998)
Publications based on Research accomplishments of JSEP program at UCLA are reported. The program consists of 5 research units. This is the only JSEP program emphasizing the millimeter wave...
Yashiro, H., Itoh, T., Tanno, K.
The hydrolysis behavior of chromium(III) has been studied in chloride solutions up to 523 K; chromium(III) was hydrolyzed to reduce the pH of solution forming soluble hydrolyzed species such as...
Preparation of Pure Alpha-Silicon Nitride from Silicon Powder. (1998)
Crystalline Si3N4 exists in two forms, designated alpha and beta. It is generally not easy to prepare pure alpha-Si3N4 by the reaction between silicon powder and nitrogen gas. A small amount of the...
Sato, K., Suzuki, T., Funayama, O., Isoda, T., Itoh, T.
A low viscosity perhydropolysilazane which is converted to Si-N ceramics with a 70-90 wt% yield by pyrolyzing at temperatures above 800 C, was used as a matrix precursor. The preforms of C(f)/Si-N...
Status of the Automotive Ceramic Gas Turbine Development Program. (1998)
A seven-year program, designated "Research and Development of Automotive CGT," commenced in June 1990 with the object of demonstrating the potential advantages of ceramic gas turbine engines for...
KamLAND: a liquid scintillator anti-neutrino detector at the Kamioka site (1998)
Alivisatos, P, Berridge, S C, Bokor, N, Britton, C L, Bryan, W, Bugg, W M, ...
The 1000 ton liquid scintillation detector project at Kamioka (Kam-LAND) (1997)
Suekane, F, Suzuki, A, Shirai, J, Suekane, F, Hasegawa, A, Iwamoto, T, ...
Cryptanalysis: A survey of recent results (1997)
S. Tsujii, K. Kurosawa, T. Itoh, A Fujioka, T. Matsumoto
Inspite of progress in computational complexity, it is still true that cryptosystems are tested by subjecting them to cryptanalytical attacks by experts. MOst of the cryptosystems that have been...
Nonlinear Wave Phenomena in an Electron-Beam Plasma (1997)
Yamagiwa, K., Itoh, T., Nakayama, T.
An experiment has been carried out to investigate one-dimensional nonlinear evolution and formation of the localized structure of unstable waves in an electron-beam plasma. The plasma system is...
Nonlinear Wave Phenomena in an Electron-Beam Plasma (1997)
Yamagiwa, K., Itoh, T., Nakayama, T.
An experiment has been carried out to investigate one-dimensional nonlinear evolution and formation of the localized structure of unstable waves in an electron-beam plasma. The plasma system is...
Nonlinear Wave Phenomena in an Electron-Beam Plasma (1997)
Yamagiwa, K., Itoh, T., Nakayama, T.
An experiment has been carried out to investigate one-dimensional nonlinear evolution and formation of the localized structure of unstable waves in an electron-beam plasma. The plasma system is...
Circuit model of coplanar-waveguide (CPW) phase-shifter on GaAs substrates (1990)
Cheung, P., Islam, M. S., Neikirk, D. P., Itoh, T.
We present theoretical and experimental data in the frequency spectrum and doping concentration that show the variation of the effective index of refraction neff from a "slow wave" mode into the...