M. Matsuoka

Tokyo Institute of Technology

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MAXI/GSC detection of an unexpected brightening from Be/X-ray binary pulsar, GRO J1008-57

The astronomer's telegram (2012)

M. Nakajima T. Mihara M. Sugizaki K. Yoshidome M. Yamauchi

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The first field trial of a wavelength routing WDM full-mesh network system (AWG-STAR) in a metropolitan/local area

Kazuto Noguchi Hiromasa Tanobe M. Matsuoka Yoshinori Koike

We describe the first field trial of a secure wavelength routing full-mesh WDM (AWG-STAR) network for citywide local-administration in Japan. A 32/spl times/32 AWG-router and five WDM nodes with a management system of 43 nodes were installed in a downtown area.

Downtown

Star (game theory)

Field trial

Star network

Metropolitan area network

10.1109/ofc.2003.316137

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ChemInform Abstract: Near‐Infrared Absorbing Dyes

ChemInform (1993)

Jürgen Fabian Hiroyuki Nakazumi M. Matsuoka

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

10.1002/chin.199312328

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Cyanovinylheteroaromatics for Organic Nonlinear Optics

Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics (1990)

M. Matsuoka Mitsukazu Takao T. KITAO T. Fujiwara Kazumi Nakatsu

Abstract Effects of various substituents including chromophores on the second harmonic generation (SHG) of Cyanovinylheteroaromatics were examined. The molecular polarizability was calculated by the PPP MO method to correlate SHG responsiveness with chemical structures. 3-[(2-cyano-2-ethoxycarbonyl)ethenyl]indole 8b exhibited good SHG efficiency (PE = 25 U). The X-ray analysis of 8b showed that the crystals belong to novel and the most favorable P1 space group.

Chromophore

Second-harmonic imaging microscopy

Space group

10.1080/00268949008047789

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Citations (91)

LIGO/Virgo G298936 : MAXI/GSC observations

GRB Coordinates Network (2017)

S. Sugita N. Kawai M. Serino H. Negoro S. Ueno

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CHARACTERISTICS OF EARTHQUAKE GROUND MOTION FROM AN ARRAY OBSERVATION IN HIGASHINADA WARD, KOBE CITY

Journal of Structural and Construction Engineering (Transactions of AIJ) (1998)

Katsumi KURITA Hiroaki Yamanaka M. Matsuoka Saburoh MIDORIKAWA Kazuoh SEO

A temporary earthquake array observation was done in Higashinada of Kobe city, which is one of heavily damaged areas in the 1995 Hyogo-ken nanbu earthquake. Using records of aftershocks, we discussed site effects and propagation of seismic waves in sedimentary layers. First, we compared the ratio of the maximum amplitudes of the records to that at the reference rock site. It was found that the ratio of the maximum horizontal velocity becomes larger in the heavily damage zone than those out of the area. The basement depth is estimated from travel time difference between initial S-and SP-waves. This agrees well with results of seismic surveys. However, we found that the spectral ratios at sites in the Rokko Island are larger than those at the other sites at periods of 2 to 4 sec. This suggests the amplification of seismic waves in deep sedimentary layers. Polarization and semblance analysis of the long-period motion indicate that they are Love waves propagating from the north to the south. A multiple filtering analysis for the long-period motion clearly shows dispersive features of the Love waves.

Basement

Tsunami wave

Strong ground motion

10.3130/aijs.63.179_2

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Development of terrain classifications as a proxy to estimate VS30

Junko Iwahashi Dai Yamazaki Julie Herrick Alan Yong M. Matsuoka

Proxy (statistics)

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X-ray observations of high-z radio loud/quiet quasars

Advances in Space Research (1999)

M. Matsuoka T.G Wang H. Kubo T. Mihara C. Vignali

QUIET

10.1016/s0273-1177(99)00242-2

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Citations (2)

Building damage estimation by integration between seismic intensity information and ALOS/PALSAR images of the 2007 Peru earthquake

IEEE Asia-Pacific Conference on Synthetic Aperture Radar (2013)

M. Matsuoka Miguel Estrada

With the aim of developing a model for estimating building damage from synthetic aperture radar (SAR) data in the L-band, which is appropriate for Peru, we propose a regression discriminant function based on field survey data in Pisco, which was seriously damaged in the 2007 Peru earthquake. The proposed function discriminates among damage ranks corresponding to the severe damage ratio of buildings using ALOS/PALSAR imagery of the disaster area before and after the earthquake. By calculating differences in and correlations of backscattering coefficients, which were explanatory variables of the regression discriminant function, a normalized likelihood function for the severe damage ratio was developed based on discriminant scores. The distribution of the severe damage ratio was accurately estimated, furthermore, from PALSAR imagery using data integration of the likelihood function with fragility functions in terms of the seismic intensity of the earthquake.

Discriminant function analysis

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Study on Absolute Calibration Coefficient Improvement for ALOS PALSAR Data after Initial Calibration Check

PIERS Online (2009)

Kazuki Nakamura Shinsuke Kodama Yuko Takeyama M. Matsuoka

The Advanced Land Observing Satellite (ALOS) was launched in 2006, carrying the Phased Array type L-band Synthetic Aperture Radar (PALSAR). Although three years have passed from the start of ALOS PALSAR observation, we know the PALSAR is in operation with greatly stability operation. However, we need to monitor its performance for the future sustainable operation in order to evaluate the temporal sensitivity variations of the PALSAR sensor and keep the calibration coe-cient quality and its improvement. To achieve this goal, AIST (National Institute of Advanced Industrial Science and Technology) kicked ofi the PALSAR calibration and validation campaign in 2007. We especially focus on cross-polarization calibration and aim to propose an improved backscattering coe-cient by evaluating the absolute calibration coe-cient accuracy is evaluated, which is calculated for each polarization based on the ground- truth. In the calibration observations, we used two triangular trihedral corner re∞ectors (CRs) of size 2m and 3m for the like-polarization and our inbuilt prototype rotatable rectangular dihedral CR was used for the cross-polarization.

10.2529/piers080907051657

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Citations (2)