The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform
Toshiaki Sato - One of the best experts on this subject based on the ideXlab platform.
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A Semi-Empirical Method for simulating strong ground motions based on variable-slip rupture models for large earthquakes
Bulletin of the Seismological Society of America, 1999Co-Authors: Kazuo Dan, Toshiaki SatoAbstract:Abstract Variable-slip rupture models for large earthquakes, obtained by the source inversion of long-period (>4 sec) seismic waves, are taken into account in a Semi-Empirical Method for simulating broadband (< about 10 sec) strong ground motions. The high-frequency (>0.25 Hz) source spectrum of the (p, q)th subfault is inferred by the θ−2 mode with two circular corner frequencies. The first is ωDpq = Vpq/Dpq, due to the temporal integration of the slip-velocity time function, where Vpq is the maximum slip velocity and Dpq is the final slip. The other is ωSpq = 2βpq/λpq, due to the spacial integration of the slip-velocity time function on the subfault, where βpq is the S-wave velocity of the medium and λpq is the equivalent radius of the subfault. Here, Vpq, Dpq, βpq, and λpq are specified by the long-period source-inversion results. First, we describe this new Method by applying it to the variable-slip rupture model for the 1985 Michoacan, Mexico, earthquake of MS 8.1 obtained by Mendoza and Hartzell (1989). The simulated accelerations and velocities at CAL (Caleta de Campos) and VIL (La Villita), both located above the ruptured zone, are in good agreement with the observed ones. Next, the Method is applied to the variable-slip rupture model for the 1923 Kanto, Japan, earthquake of MS 8.2 obtained by Wald and Somerville (1995). This earthquake is one of the most important earthquakes for the mitigation of earthquake disaster in the Tokyo metropolitan area; unfortunately, strong-motion records for this earthquake were off-scaled in the region of strong shaking and significant damage. The pseudo-velocity response spectrum of the simulated acceleration of TOK (Tokyo JMA) averages 60 cm/sec in the period range of 0.5 to 10 sec and is consistent with that of the Kanto earthquake record observed at HNG (Hongo, Tokyo), whose off-scaled parts were restored as well as possible by Yokota et al. (1989). The instrumental JMA seismic intensities (JMA, 1996) of the simulated accelerations at TOK and YOK (Yokohama JMA) are consistent with the observed JMA seismic intensity 6 (JMA, 1983). The instrumental JMA seismic intensity of the simulated accelerations at KNS (soil site in Odawara) is also consistent with the JMA seismic intensity 7, estimated from the ratio of collapsed houses (Mononobe, 1925). The simulated broadband (0.1 to 10 sec) motions will be useful in the mitigation of earthquake disaster in the Tokyo metropolitan area.
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A Semi-Empirical Method for simulating strong ground motions based on variable-slip rupture models for large earthquakes
Bulletin of the Seismological Society of America, 1999Co-Authors: Kazuo Dan, Toshiaki SatoAbstract:Abstract Variable-slip rupture models for large earthquakes, obtained by the source inversion of long-period (>4 sec) seismic waves, are taken into account in a Semi-Empirical Method for simulating broadband ( 0.25 Hz) source spectrum of the ( p, q )th subfault is inferred by the θ −2 mode with two circular corner frequencies. The first is ω Dpq = V pq /D pq , due to the temporal integration of the slip-velocity time function, where V pq is the maximum slip velocity and D pq is the final slip. The other is ω Spq = 2β pq /λ pq , due to the spacial integration of the slip-velocity time function on the subfault, where β pq is the S -wave velocity of the medium and λ pq is the equivalent radius of the subfault. Here, V pq , D pq , β pq , and λ pq are specified by the long-period source-inversion results. First, we describe this new Method by applying it to the variable-slip rupture model for the 1985 Michoacan, Mexico, earthquake of M S 8.1 obtained by Mendoza and Hartzell (1989). The simulated accelerations and velocities at CAL (Caleta de Campos) and VIL (La Villita), both located above the ruptured zone, are in good agreement with the observed ones. Next, the Method is applied to the variable-slip rupture model for the 1923 Kanto, Japan, earthquake of M S 8.2 obtained by Wald and Somerville (1995). This earthquake is one of the most important earthquakes for the mitigation of earthquake disaster in the Tokyo metropolitan area; unfortunately, strong-motion records for this earthquake were off-scaled in the region of strong shaking and significant damage. The pseudo-velocity response spectrum of the simulated acceleration of TOK (Tokyo JMA) averages 60 cm/sec in the period range of 0.5 to 10 sec and is consistent with that of the Kanto earthquake record observed at HNG (Hongo, Tokyo), whose off-scaled parts were restored as well as possible by Yokota et al. (1989). The instrumental JMA seismic intensities (JMA, 1996) of the simulated accelerations at TOK and YOK (Yokohama JMA) are consistent with the observed JMA seismic intensity 6 (JMA, 1983). The instrumental JMA seismic intensity of the simulated accelerations at KNS (soil site in Odawara) is also consistent with the JMA seismic intensity 7, estimated from the ratio of collapsed houses (Mononobe, 1925). The simulated broadband (0.1 to 10 sec) motions will be useful in the mitigation of earthquake disaster in the Tokyo metropolitan area.
Pavel S. Dolotov - One of the best experts on this subject based on the ideXlab platform.
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Semi-Empirical Method for Estimation of Single-Event Upset Cross Section for SRAM DICE Cells
IEEE Transactions on Nuclear Science, 2016Co-Authors: Maxim S. Gorbunov, Anna B. Boruzdina, Pavel S. DolotovAbstract:We propose a new Semi-Empirical Method for estimation of Single Event Upset (SEU) cross section for SRAM Dual Interlocked Cells (DICE) with known distance between neighboring sensitive volumes. The Method is based on experimental analysis of SEU maps in sub-100 nm 6T SRAM along with layout considerations and SPICE simulations. This Method could help designers to estimate the SEE robustness of DICE cells at the design stage.
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Semi-Empirical Method for Estimation of Single-Event Upset Cross-Section for SRAM DICE Cells
2015 15th European Conference on Radiation and Its Effects on Components and Systems (RADECS), 2015Co-Authors: Maxim S. Gorbunov, Anna B. Boruzdina, Pavel S. DolotovAbstract:We propose a new Semi-Empirical Method for estimation of Single Event Upset (SEU) cross-section for SRAM Dual Interlocked Cells (DICE) with known distance between neighboring sensitive volumes. The Method is based on experimental analysis of SEU maps in sub-100 nm 6T SRAM along with layout considerations and SPICE simulations. It could help to significantly improve SEE robustness of modern CMOS VLSI by design.
Kazuo Dan - One of the best experts on this subject based on the ideXlab platform.
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A Semi-Empirical Method for simulating strong ground motions based on variable-slip rupture models for large earthquakes
Bulletin of the Seismological Society of America, 1999Co-Authors: Kazuo Dan, Toshiaki SatoAbstract:Abstract Variable-slip rupture models for large earthquakes, obtained by the source inversion of long-period (>4 sec) seismic waves, are taken into account in a Semi-Empirical Method for simulating broadband (< about 10 sec) strong ground motions. The high-frequency (>0.25 Hz) source spectrum of the (p, q)th subfault is inferred by the θ−2 mode with two circular corner frequencies. The first is ωDpq = Vpq/Dpq, due to the temporal integration of the slip-velocity time function, where Vpq is the maximum slip velocity and Dpq is the final slip. The other is ωSpq = 2βpq/λpq, due to the spacial integration of the slip-velocity time function on the subfault, where βpq is the S-wave velocity of the medium and λpq is the equivalent radius of the subfault. Here, Vpq, Dpq, βpq, and λpq are specified by the long-period source-inversion results. First, we describe this new Method by applying it to the variable-slip rupture model for the 1985 Michoacan, Mexico, earthquake of MS 8.1 obtained by Mendoza and Hartzell (1989). The simulated accelerations and velocities at CAL (Caleta de Campos) and VIL (La Villita), both located above the ruptured zone, are in good agreement with the observed ones. Next, the Method is applied to the variable-slip rupture model for the 1923 Kanto, Japan, earthquake of MS 8.2 obtained by Wald and Somerville (1995). This earthquake is one of the most important earthquakes for the mitigation of earthquake disaster in the Tokyo metropolitan area; unfortunately, strong-motion records for this earthquake were off-scaled in the region of strong shaking and significant damage. The pseudo-velocity response spectrum of the simulated acceleration of TOK (Tokyo JMA) averages 60 cm/sec in the period range of 0.5 to 10 sec and is consistent with that of the Kanto earthquake record observed at HNG (Hongo, Tokyo), whose off-scaled parts were restored as well as possible by Yokota et al. (1989). The instrumental JMA seismic intensities (JMA, 1996) of the simulated accelerations at TOK and YOK (Yokohama JMA) are consistent with the observed JMA seismic intensity 6 (JMA, 1983). The instrumental JMA seismic intensity of the simulated accelerations at KNS (soil site in Odawara) is also consistent with the JMA seismic intensity 7, estimated from the ratio of collapsed houses (Mononobe, 1925). The simulated broadband (0.1 to 10 sec) motions will be useful in the mitigation of earthquake disaster in the Tokyo metropolitan area.
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A Semi-Empirical Method for simulating strong ground motions based on variable-slip rupture models for large earthquakes
Bulletin of the Seismological Society of America, 1999Co-Authors: Kazuo Dan, Toshiaki SatoAbstract:Abstract Variable-slip rupture models for large earthquakes, obtained by the source inversion of long-period (>4 sec) seismic waves, are taken into account in a Semi-Empirical Method for simulating broadband ( 0.25 Hz) source spectrum of the ( p, q )th subfault is inferred by the θ −2 mode with two circular corner frequencies. The first is ω Dpq = V pq /D pq , due to the temporal integration of the slip-velocity time function, where V pq is the maximum slip velocity and D pq is the final slip. The other is ω Spq = 2β pq /λ pq , due to the spacial integration of the slip-velocity time function on the subfault, where β pq is the S -wave velocity of the medium and λ pq is the equivalent radius of the subfault. Here, V pq , D pq , β pq , and λ pq are specified by the long-period source-inversion results. First, we describe this new Method by applying it to the variable-slip rupture model for the 1985 Michoacan, Mexico, earthquake of M S 8.1 obtained by Mendoza and Hartzell (1989). The simulated accelerations and velocities at CAL (Caleta de Campos) and VIL (La Villita), both located above the ruptured zone, are in good agreement with the observed ones. Next, the Method is applied to the variable-slip rupture model for the 1923 Kanto, Japan, earthquake of M S 8.2 obtained by Wald and Somerville (1995). This earthquake is one of the most important earthquakes for the mitigation of earthquake disaster in the Tokyo metropolitan area; unfortunately, strong-motion records for this earthquake were off-scaled in the region of strong shaking and significant damage. The pseudo-velocity response spectrum of the simulated acceleration of TOK (Tokyo JMA) averages 60 cm/sec in the period range of 0.5 to 10 sec and is consistent with that of the Kanto earthquake record observed at HNG (Hongo, Tokyo), whose off-scaled parts were restored as well as possible by Yokota et al. (1989). The instrumental JMA seismic intensities (JMA, 1996) of the simulated accelerations at TOK and YOK (Yokohama JMA) are consistent with the observed JMA seismic intensity 6 (JMA, 1983). The instrumental JMA seismic intensity of the simulated accelerations at KNS (soil site in Odawara) is also consistent with the JMA seismic intensity 7, estimated from the ratio of collapsed houses (Mononobe, 1925). The simulated broadband (0.1 to 10 sec) motions will be useful in the mitigation of earthquake disaster in the Tokyo metropolitan area.
N.n. Bulgakov - One of the best experts on this subject based on the ideXlab platform.
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Adsorbed NH_x species on Pt(111) and Pt(100) surfaces studied by the semi‐empirical Method of interacting bonds
Catalysis Letters, 1999Co-Authors: A.r. Cholach, N.n. BulgakovAbstract:The properties of the adsorbed NH_x species (x=0,1,2,3) on platinum(111) and (100)‐(1×1) single‐crystal planes are studied by the semi‐empirical Method of interacting bonds. Both surfaces reveal similar features. The adsorbed species NH and NH_2 are stable on the surface, and stable NH_3(ads) species cannot form. The NH_2(ads) species is favourable in adsorbed hydrogen excess, but lack of the latter results in NH_ads becoming dominant. Both NH and NH_2 species are expected to diffuse easily over the surface due to the small difference between their bond strengths to various adsorption sites.
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Adsorbed NH x species on Pt(111) and Pt(100) surfaces studied by the Semi-Empirical Method of interacting bonds
Catalysis Letters, 1999Co-Authors: A.r. Cholach, N.n. BulgakovAbstract:The properties of the adsorbed NHx species (x=0,1,2,3) on platinum(111) and (100)‐(1×1) single‐crystal planes are studied by the semi‐empirical Method of interacting bonds. Both surfaces reveal similar features. The adsorbed species NH and NH2 are stable on the surface, and stable NH3(ads) species cannot form. The NH2(ads) species is favourable in adsorbed hydrogen excess, but lack of the latter results in NHads becoming dominant. Both NH and NH2 species are expected to diffuse easily over the surface due to the small difference between their bond strengths to various adsorption sites.
Michio Kurata - One of the best experts on this subject based on the ideXlab platform.
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A semi‐empirical Method for estimating unperturbed dimensions of chain polymers from the intrinsic viscosity‐molecular weight relationship
Journal of Polymer Science Part C: Polymer Symposia, 2007Co-Authors: Hiroshi Inagaki, Hidematsu Suzuki, Michio KurataAbstract:A Semi-Empirical Method for estimating unperturbed chain dimensions from relationships between intrinsic viscosity M and molecular weight M is proposed. This Method is based on combining the Ptitsyn equation of the excluded volume effect with a Semi-Empirical relation between two expansion factors αη and α for the hydrodynamic radius and the end-to-end distance, respectively, i.e., αη3 = α5/2, which has been suggested by Yamakawa and Kurata. This combination gives ([η]/M1/2)4/5 = 0.786K4/5 + 0.950-K4/5*2/3M1/3 for large α, presumably for a larger than 1.4, Experimental tests are made with viscosity data obtained for polystyrene fractions in trans-decalin, benzene, and butanone and also with those obtained for poly(methyl methacrylate) in various solvents. Light-scattering data by Berry are discussed in the light of present results. The parameter B describing long-range interactions is found to be nonlinearly related to the reciprocal of temperature 1/T, that is, the quantity B0 as defined by B/[(1 - (η)/T)] is a decreasing function of T. On (he basis of experimental result, disagreement between two B values deduced from intra- and inter-chain interactions is pointed out.
