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A commercial finite element approach to modelling Glacial Isostatic Adjustment on spherical self-gravitating compressible earth models

Huang, Pingping (author), Steffen, Rebekka (author), Steffen, Holger (author), Klemann, Volker (author), Wu, Patrick (author), van der Wal, W. (author), Martinec, Zdeněk (author), Tanaka, Yoshiyuki (author)

This paper presents a method that modifies commercial engineering-oriented finite element packages for the modelling of Glacial Isostatic Adjustment (GIA) on a self-gravitating, compressible and spherical Earth with 3-D structures. The approach, called the iterative finite element body and surface force (FEMIBSF) approach, solves the...

journal article 2023

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Impact of interstitial C on phase stability and stacking-fault energy of the CrMnFeCoNi high-entropy alloy

Ikeda, Yuji (author), Tanaka, Isao (author), Neugebauer, Jörg (author), Körmann, F.H.W. (author)

Interstitial alloying in CrMnFeCoNi-based high-entropy alloys is known to modify their mechanical properties. Specifically, strength can be increased due to interstitial solid-solution hardening, while simultaneously affecting ductility. In this paper, first-principles calculations are carried out to analyze the impact of interstitial C atoms...

journal article 2019

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LQG control with minimum directed information: Semidefinite programming approach

Tanaka, T. (author), Mohajerin Esfahani, P. (author), Mitter, S.K. (author)

We consider a discrete-time Linear-QuadraticGaussian (LQG) control problem in which Massey’s directed information from the observed output of the plant to the control input is minimized while required control performance is attainable. This problem arises in several different contexts, including joint encoder and controller design for data-rate...

journal article 2018

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Impact of chemical fluctuations on stacking fault energies of CrCoNi and CrMnFeCoNi high entropy alloys from first principles

Ikeda, Yuji (author), Körmann, F.H.W. (author), Tanaka, Isao (author), Neugebauer, Jörg (author)

Medium and high entropy alloys (MEAs and HEAs) based on 3d transition metals, such as face-centered cubic (fcc) CrCoNi and CrMnFeCoNi alloys, reveal remarkable mechanical properties. The stacking fault energy (SFE) is one of the key ingredients that controls the underlying deformation mechanism and hence the mechanical performance of...

journal article 2018

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Temperature-dependent phonon spectra of magnetic random solid solutions

Ikeda, Yuji (author), Körmann, F.H.W. (author), Dutta, Biswanath (author), Carreras, Abel (author), Seko, Atsuto (author), Neugebauer, Jörg (author), Tanaka, Isao (author)

A first-principles-based computational tool for simulating phonons of magnetic random solid solutions including thermal magnetic fluctuations is developed. The method takes fluctuations of force constants due to magnetic excitations as well as due to chemical disorder into account. The developed approach correctly predicts the experimentally...

journal article 2018

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Long term evaluation on the groundwater chemistry due to cement materials with numerical simulation

Sampietro, D. (author), Abarca, E. (author), Bayer, M. (author), Jordana, S. (author), Molinero, J. (author), Tanaka, T. (author), Hashimoto, S. (author), Iwatsuki, T. (author), Onoe, H. (author)

conference paper 2016

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Influence of thermal boundary conditions on the current-driven resistive transition in VO2 microbridges

Manca, N. (author), Kanki, T. (author), Tanaka, H. (author), Marré, D. (author), Pellegrino, L. (author)

We investigate the resistive switching behaviour of VO2 microbridges under current bias as a function of temperature and thermal coupling with the heat bath. Upon increasing the electrical current bias, the formation of the metallic phase can progress smoothly or through sharp jumps. The magnitude and threshold current values of these sharp...

journal article 2015

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Effects of particle size and solid-to-fluid density ratio on the dynamcs of particle-laden homogeneous shear turbulence

Particulate turbulent flows are encountered in many natural and industrial situations. In the present study, we numerically investigate how the dynamics of particle-laden homogeneous shear turbulence depends on the particle size and solid-to-fluid density ratio in order to deepen the understanding of the interaction between particles and...

conference paper 2015

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Traditional Wood Joint System in Digital Fabrication

Kanasaki, K. (author), Tanaka, H. (author)

Tugite and Shiguchi are traditional architectural techniques of Japan, which connect materials without the use of nails or adhesives. Tugite is a technique to connect materials to augment the lack of length of available materials. Shiguchi is a technique to connect materials at an angle. With a firm basis in this tradition and the craftsmanship...

conference paper 2013

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WoodWeaver: Fabricating curved objects without moulds or glue

Ohshima, T. (author), Igarashi, T. (author), Mitani, J. (author), Tanaka, H. (author)

design a single free-form curved surface and to fabricate it based on the bending deformation characteristics of the material. The system also indicates an invalid shape; that is, one that will break upon bending deformation. The user can then design a valid shape with this information. We also develop an optimal Dukta pattern that is the...

conference paper 2013

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Hindcast and validation of Hurricane Ike (2008) waves, forerunner, and storm surge

Hope, M.E. (author), Westerink, J.J. (author), Kennedy, A.B. (author), Kerr, P.C. (author), Dietrich, J.C. (author), Dawson, C. (author), Bender, C.J. (author), Smith, J.M. (author), Jensen, R.E. (author), Zijlema, M. (author), Holthuijsen, L.H. (author), Luettich, R.A. (author), Powell, M.D. (author), Cardone, V.J. (author), Cox, A.T. (author), Pourtaheri, H. (author), Roberts, H.J. (author), Atkinson, J.H. (author), Tanaka, S. (author), Westerink, H.J. (author), Westerink, L.G. (author)

Hurricane Ike (2008) made landfall near Galveston, Texas, as a moderate intensity storm. Its large wind field in conjunction with the Louisiana-Texas coastline's broad shelf and large scale concave geometry generated waves and surge that impacted over 1000 km of coastline. Ike's complex and varied wave and surge response physics included: the...

journal article 2013

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Surface plasmon-enhanced terahertz emission from a hemicyanine self-assembled monolayer

Ramakrishnan, G. (author), Kumar, N. (author), Planken, P.C.M. (author), Tanaka, D. (author), Kajikawa, K. (author)

Emission of terahertz radiation is observed when surface plasmons are excited on a thin film of gold, in the Kretschmann geometry. When a hemicyanine-terminated alkanethiol self-assembled monolayer of thickness 1.2 nm is deposited on the gold film, stronger terahertz emission is observed. Our experimental results confirm that enhanced terahertz...

journal article 2012

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Dynamic Behaviors of a Vortex Ring on a Butterfly and a Small Flapping Robot

Fuchiwaki, M. (author), Kuroki, T. (author), Tanaka, K. (author), Tabata, T. (author)

Butterflies fly combining wing flapping and gliding efficiently and have beautiful flight patterns. Micro-Air-Vehicles (MAVs) and micro-flight robots that mimic the flight mechanisms of insects have been attracting significant attention in recent years. A number of MAVs and micro-flight robots that use various devices have been reported. However...

conference paper 2011

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Design exploration of high-lift airfoil using Kriging model and data mining technique

Kanazaki, M. (author), Tanaka, K. (author), Jeong, S. (author), Yamamoto, K. (author)

A multi-objective design exploration for a three-element airfoil consisted of a slat, a main wing, and a flap was carried out. The lift curve improvement is important to design high-lift system, thus design has to be performed with considered multi-angle. The objective functions considered here are to maximize the lift coefficient at landing and...

conference paper 2006

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Erratum: Theory of charge transport in diffusive normal metal/unconventional singlet superconductor contacts [Phys. Rev. B 69, 144519 (2004)]

Tanaka, Y. (author), Nazarov, Yu.V. (author), Golubov, A.A. (author), Kashiwaya, S. (author)

journal article 2004

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Theory of charge transport in diffusive normal metal/unconventional singlet superconductor contacts

Tanaka, Y. (author), Nazarov, Yu.V. (author), A. A. Golubov, A.A. (author), Kashiwaya, S. (author)

journal article 2004

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Circuit Theory of Unconventional Superconductor Junctions

Tanaka, Y. (author), Nazarov, Yu.V. (author), Kashiwaya, S. (author)

journal article 2003

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Reconstructed three-dimensional electron momentum density in lithium: A Compton scattering study

Tanaka, Y. (author), Sakurai, Y. (author), Stewart, A.T. (author), Shiotani, N. (author), Mijnarends, P.E. (author), Kaprzyk, S. (author), A. Bansil, A. (author)

journal article 2001

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Panel discussion - Future prospects of lithium batteries

Owens, B. (author), Osaka, T. (author), Ohta, A. (author), Takeuchi, E. (author), Takamura, T. (author), Gibbard, F. (author), Abraham, K.M. (author), Megahed, S. (author), Kozawa, A. (author), Ishikawa, R. (author), Walk, C.R. (author), Blomgren, G. (author), Imai, T. (author), Kurokawa, H. (author), Schoonman, J. (author), Nakajima, K. (author), Atanasoski, R. (author), Tanaka, T. (author), Moy, R. (author), Yazami, R. (author), Broussely, M. (author), Yagasaki, E. (author), Yao, C.Y. (author), Suzuki, K. (author), Besenhard, J. (author), Peled, E. (author), Kuroki, M. (author), Levy, S. (author), Tatsumi, K. (author), Armand, M. (author)

journal article 1997

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Magnetoexcitons in quantum wires with an anisotropic parabolic potential

Tanaka, T. (author), Arakawa, Y. (author), Bauer, G.W.E. (author)

journal article 1994