Graduate School of Fundamental Science and Engineering

  • Japan

Research Output 1974 2019

2000
4 Citations (Scopus)

The subjectivity of the canonical homomorphism from singular homology to čech homology

Eda, K. & Kawamura, K., 2000, In : Proceedings of the American Mathematical Society. 128, 5, p. 1487-1495 9 p.

Research output: Contribution to journalArticle

Homology Groups
Compact Metric Space
Homomorphism
Homology
Locally Connected
2 Citations (Scopus)

Time-dependent nucleation rate

Saito, Y., Honjo, M., Konishi, T. & Kitada, A., 2000 Oct, In : Journal of the Physical Society of Japan. 69, 10, p. 3304-3307 4 p.

Research output: Contribution to journalArticle

nucleation
Fokker-Planck equation
monomers

α-EM algorithm and its basic properties

Matsuyama, Y., 2000 Oct, In : Systems and Computers in Japan. 31, 11, p. 12-23 12 p.

Research output: Contribution to journalArticle

EM Algorithm
Hessian matrix
CPU Time
Parameter Design
Convergence Theorem
7 Citations (Scopus)

α-EM algorithm and α-ICA learning based upon extended logarithmic information measures

Matsuyama, Y., Niimoto, T., Katsumata, N., Suzuki, Y. & Furukawa, S., 2000, Proceedings of the International Joint Conference on Neural Networks. Piscataway, NJ, United States: IEEE, Vol. 3. p. 351-356 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Independent component analysis
Jacobian matrices
2001
6 Citations (Scopus)

An approximation scheme for motion by mean curvature with right-angle boundary condition

Ishii, H. & Ishii, K., 2001, In : SIAM Journal on Mathematical Analysis. 33, 2, p. 369-389 21 p.

Research output: Contribution to journalArticle

Motion by Mean Curvature
Right angle
Approximation Scheme
Japan
Boundary conditions
6 Citations (Scopus)

Automorphism groups of one-point codes from the curves yq + y = xqr+1

Kondo, S., Katagiri, T. & Ogihara, T., 2001 Sep, In : IEEE Transactions on Information Theory. 47, 6, p. 2573-2579 7 p.

Research output: Contribution to journalArticle

Group
1 Citation (Scopus)

Independent component analysis by convex divergence minimization: Applications to brain fMRI analysis

Matsuyama, Y. & Imahara, S., 2001, Proceedings of the International Joint Conference on Neural Networks. Vol. 1. p. 412-417 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Independent component analysis
Brain
Magnetic Resonance Imaging
4 Citations (Scopus)

Nanometer-size polycrystallization in bcc → hcp + C15 structural change of a Ti-30 mol%Cr alloy

Hirata, A., Tanimura, M. & Koyama, Y., 2001 Dec, In : Materials Transactions. 42, 12, p. 2553-2558 6 p.

Research output: Contribution to journalArticle

matrices
polyhedrons
Transmission electron microscopy
transmission electron microscopy
microstructure
1 Citation (Scopus)

Trees, fundamental groups and homology groups

Eda, K. & Higasikawa, M., 2001 Aug 30, In : Annals of Pure and Applied Logic. 111, 3, p. 185-201 17 p.

Research output: Contribution to journalArticle

Homology Groups
Fundamental Group
If and only if
Uncountable
Free Group
2002
13 Citations (Scopus)

A class of stochastic optimal control problems with state constraint

Ishii, H. & Loreti, P., 2002, In : Indiana University Mathematics Journal. 51, 5, p. 1167-1196 30 p.

Research output: Contribution to journalArticle

Stochastic Optimal Control
State Constraints
Optimal Control Problem
Viscosity Solutions
Hölder Regularity
4 Citations (Scopus)

A two-dimensional random crystalline algorithm for Gauss curvature flow

Ishii, H. & Mikami, T., 2002 Sep, In : Advances in Applied Probability. 34, 3, p. 491-504 14 p.

Research output: Contribution to journalArticle

Curvature Flow
Gauss Curvature
Crystalline materials
Approximation Scheme
Hypersurface
5 Citations (Scopus)

Free subgroups of free complete products

Conner, G. & Eda, K., 2002 Apr 15, In : Journal of Algebra. 250, 2, p. 696-708 13 p.

Research output: Contribution to journalArticle

Subgroup
3 Citations (Scopus)

New chemical layered structure in Ti-Cr alloys

Hirata, A., Tanimura, M. & Koyama, Y., 2002 Jul, In : Materials Transactions. 43, 7, p. 1689-1695 7 p.

Research output: Contribution to journalArticle

metastable state
antiphase boundaries
Metastable phases
Gibbs free energy
Phase shift
7 Citations (Scopus)

On (co)homology locally connected spaces

Eda, K., Karimov, U. H. & Repovš, D., 2002 May 15, In : Topology and its Applications. 120, 3, p. 397-401 5 p.

Research output: Contribution to journalArticle

Locally Connected
Homology
Metrizable Space
Compact Hausdorff Space
Compact Space
3 Citations (Scopus)

Optimization transfer for computational learning: A hierarchy from f-ICA and alpha-EM to their offsprings

Matsuyama, Y., Imahara, S. & Katsumata, N., 2002, Proceedings of the International Joint Conference on Neural Networks. Vol. 2. p. 1883-1888 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Independent component analysis
Vector quantization
Probability density function
Learning algorithms
Brain
2 Citations (Scopus)

Supervised map ICA: Applications to brain functional MRI

Matsuyama, Y. & Kawamura, R., 2002, ICONIP 2002 - Proceedings of the 9th International Conference on Neural Information Processing: Computational Intelligence for the E-Age. Institute of Electrical and Electronics Engineers Inc., Vol. 5. p. 2259-2263 5 p. 1201895

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Independent component analysis
Brain
Chemical activation
Magnetic Resonance Imaging
Experiments
18 Citations (Scopus)

The fundamental groups of one-dimensional spaces and spatial homomorphisms

Eda, K., 2002 Sep 30, In : Topology and its Applications. 123, 3, p. 479-505 27 p.

Research output: Contribution to journalArticle

Peano Continuum
Fundamental Group
Homomorphisms
Isomorphism
Locally Connected
8 Citations (Scopus)

The fundamental groups of one-dimensional wild spaces and the Hawaiian earring

Eda, K., 2002, In : Proceedings of the American Mathematical Society. 130, 5, p. 1515-1522 8 p.

Research output: Contribution to journalArticle

Fundamental Group
Sierpinski Gasket
Curve
Locally Connected
Free Product
2 Citations (Scopus)

The non-commutative specker phenomenon in the uncountable case

Eda, K. & Shelah, S., 2002 Jun 1, In : Journal of Algebra. 252, 1, p. 22-26 5 p.

Research output: Contribution to journalArticle

Measurable Cardinal
Inverse Limit
Uncountable
2003
atomic clusters
Covalent bonds
covalent bonds
Atoms
tetrahedrons
7 Citations (Scopus)
atomic clusters
Covalent bonds
covalent bonds
Atoms
tetrahedrons
2 Citations (Scopus)

Asymptotic analysis for a class of infinite systems of first-order PDE: Nonlinear parabolic PDE in the singular limit

Ishii, H. & Shimano, K., 2003, In : Communications in Partial Differential Equations. 28, 1-2, p. 409-438 30 p.

Research output: Contribution to journalArticle

Singular Limit
Asymptotic analysis
Nonlinear Parabolic Equations
Infinite Systems
Asymptotic Analysis

Computer models of phase separation dynamics in Fe-Cr-Mo ternary alloys

Iwamoto, Y., Goto, K., Kuwajima, T., Fukuhara, E., Suwa, Y. & Saito, Y., 2003, In : Unknown Journal. 426-432, 2, p. 1059-1064 6 p.

Research output: Contribution to journalArticle

Ternary alloys
ternary alloys
Phase separation
simulation
Aging of materials
14 Citations (Scopus)

Computer simulation of grain growth by the phase field model. Effect of interfacial energy on kinetics of grain growth

Suwa, Y. & Saito, Y., 2003 Nov, In : Materials Transactions. 44, 11, p. 2245-2251 7 p.

Research output: Contribution to journalArticle

interfacial energy
Grain growth
Interfacial energy
Free energy
computerized simulation
48 Citations (Scopus)

Degradation of tensile strength of Ni-Ti superelastic alloy due to hydrogen absorption in methanol solution containing hydrochloric acid

Yokoyama, K., Ogawa, T., Asaoka, K., Sakai, J. & Nagumo, M., 2003 Nov 15, In : Materials Science and Engineering A. 360, 1-2, p. 153-159 7 p.

Research output: Contribution to journalArticle

Hydrochloric Acid
hydrochloric acid
Hydrochloric acid
tensile strength
Methanol
75 Citations (Scopus)

Delayed fracture of beta titanium orthodontic wire in fluoride aqueous solutions

Kaneko, K., Yokoyama, K., Moriyama, K., Asaoka, K., Sakai, J. & Nagumo, M., 2003 May, In : Biomaterials. 24, 12, p. 2113-2120 8 p.

Research output: Contribution to journalArticle

Orthodontic Wires
Fluorides
Acidulated Phosphate Fluoride
Titanium
Wire
75 Citations (Scopus)

Hydrogen embrittlement of Ni-Ti superelastic alloy in fluoride solution

Yokoyama, KI., Kaneko, K., Moriyama, K., Asaoka, K., Sakai, JI. & Nagumo, M., 2003 May 1, In : Journal of Biomedical Materials Research - Part A. 65, 2, p. 182-187 6 p.

Research output: Contribution to journalArticle

Hydrogen embrittlement
Fluorides
Hydrogen
Thermal desorption
Martensite
8 Citations (Scopus)

Independent component analysis minimizing convex divergence

Matsuyama, Y., Katsumata, N. & Kawamura, R., 2003, In : Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). 2714, p. 27-34 8 p.

Research output: Contribution to journalArticle

Independent component analysis
Independent Component Analysis
Divergence
Logarithmic
Information Measure

Iterative optimization of convex divergence: Applications to independent component analysis

Matsuyama, Y., 2003, IEEE International Symposium on Information Theory - Proceedings. p. 214 1 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Independent component analysis
Brain
Magnetic Resonance Imaging
9 Citations (Scopus)

Kinetics of phase separation in iron-based ternary alloys. II. Numerical simulation of phase separation in Fe-Cr-X(X = Mo, Cu) ternary alloys

Kuwajima, T., Saito, Y. & Suwa, Y., 2003 Nov, In : Intermetallics. 11, 11-12 SPEC. ISS, p. 1279-1285 7 p.

Research output: Contribution to journalArticle

Ternary alloys
Phase separation
Iron
Kinetics
Computer simulation

Modelling of phase separation dynamics in iron-based ternary alloys

Fukuhara, E., Onuma, M., Suwa, Y. & Saito, Y., 2003, In : Unknown Journal. 426-432, 5, p. 3867-3872 6 p.

Research output: Contribution to journalArticle

Ternary alloys
ternary alloys
Phase separation
Iron
iron
4 Citations (Scopus)

Monte Carlo simulation of phase separation in iron-based ternary alloys

Goto, K., Saito, Y. & Suwa, Y., 2003 Nov, In : Intermetallics. 11, 11-12 SPEC. ISS, p. 1267-1272 6 p.

Research output: Contribution to journalArticle

Ternary alloys
Phase separation
Iron
Atoms
Computer simulation
7 Citations (Scopus)

On the existence of stationary solutions of a generalized Mullins equation

Ogasawara, Y., 2003 Aug, In : Journal of the Physical Society of Japan. 72, 8, p. 1871-1873 3 p.

Research output: Contribution to journalArticle

nonlinear evolution equations
solid surfaces
grooves
temperature gradients
grain boundaries
10 Citations (Scopus)

Recognition of para-linguistic information and its application to spoken dialogue system

Fujie, S., Ejiri, Y., Matsusaka, Y., Kikuchi, H. & Kobayashi, T., 2003, 2003 IEEE Workshop on Automatic Speech Recognition and Understanding, ASRU 2003. Institute of Electrical and Electronics Engineers Inc., p. 231-236 6 p. 1318446

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Linguistics
Optical flows
Experiments
5 Citations (Scopus)

Relaxation in an L-optimization problem

Ishii, H. & Loreti, P., 2003, In : Royal Society of Edinburgh - Proceedings A. 133, 3, p. 599-615 17 p.

Research output: Contribution to journalArticle

Optimization Problem
Continuous Function
Convex Envelope
Lipschitz Function
Viscosity Solutions
4 Citations (Scopus)

Relaxation of Hamilton-Jacobi Equations

Ishii, H. & Loreti, P., 2003 Oct, In : Archive for Rational Mechanics and Analysis. 169, 4, p. 265-304 40 p.

Research output: Contribution to journalArticle

Hamilton-Jacobi Equation
Terminology
Viscosity
Eikonal Equation
Subsolution
50 Citations (Scopus)

Susceptibility to delayed fracture of Ni-Ti superelastic alloy

Yokoyama, KI., Watabe, S., Hamada, K., Sakai, JI., Asaoka, K. & Nagumo, M., 2003 Jan 20, In : Materials Science and Engineering A. 341, 1-2, p. 91-97 7 p.

Research output: Contribution to journalArticle

critical loading
martensite
hydrogen embrittlement
magnetic permeability
Martensite
36 Citations (Scopus)

The α-EM algorithm: Surrogate likelihood maximization using α-logarithmic information measures

Matsuyama, Y., 2003 Mar, In : IEEE Transactions on Information Theory. 49, 3, p. 692-706 15 p.

Research output: Contribution to journalArticle

divergence
simulation
Computer simulation
32 Citations (Scopus)

Ultrastructure and function of long and short sperm in Cicadidae (Hemiptera)

Kubo-Irie, M., Irie, M., Nakazawa, T. & Mohri, H., 2003 Nov, In : Journal of Insect Physiology. 49, 11, p. 983-991 9 p.

Research output: Contribution to journalArticle

Cicadidae
Hemiptera
Spermatozoa
ultrastructure
spermatozoa
2004

A low latency inter-system handover scheme for multiple interfaces terminal

Liu, J., Kazaura, K. & Matsumoto, M., 2004, Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication. Vol. 2. p. 717-720 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Computer terminals
Interfaces (computer)
Computer systems
Network architecture
Next generation networks

An approach for providing location information in IP enabled emergency communication service

Liu, J., Kazaura, K. & Matsumoto, M., 2004, Proceedings of the Fourth IASTED International Multi-Conference on Wireless and Optical Communications. Fapojuwo, A. O. (ed.). p. 245-250 6 p. 422-166

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Communication
Disasters
Recovery
3 Citations (Scopus)

A simulation based evaluation on the performance of integrated 3G - Wireless LAN network

Kazaura, K., Jun, L. & Matsumoto, M., 2004, IEEE Region 10 Annual International Conference, Proceedings/TENCON. Vol. B.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Local area networks
Communication systems
Quality of service
Cellular radio systems
Mobile telecommunication systems
34 Citations (Scopus)

Degradation in performance of orthodontic wires caused by hydrogen absorption during short-term immersion in 2.0% acidulated phosphate fluoride solution

Kaneko, K., Yokoyama, K., Moriyama, K., Asaoka, K. & Sakai, J., 2004 Aug, In : Angle Orthodontist. 74, 4, p. 487-495 9 p.

Research output: Contribution to journalArticle

Acidulated Phosphate Fluoride
Orthodontic Wires
Immersion
Hydrogen
Tensile Strength
51 Citations (Scopus)

Delayed fracture of Ni-Ti superelastic alloys in acidic and neutral fluoride solutions

Yokoyama, K., Kaneko, K., Moriyama, K., Asaoka, K., Sakai, J. & Nagumo, M., 2004 Apr 1, In : Journal of Biomedical Materials Research - Part A. 69, 1, p. 105-113 9 p.

Research output: Contribution to journalArticle

Fluorides
Hydrogen
Corrosion
titanium nickelide
Degradation
9 Citations (Scopus)

Energy consumption tradeoffs for compressed wireless data at a mobile terminal

Veijalainen, J., Ojanen, E., Haq, M. A., Vahteala, V. P. & Matsumoto, M., 2004 May, In : IEICE Transactions on Communications. E87-B, 5, p. 1123-1130 8 p.

Research output: Contribution to journalArticle

Energy conservation
Energy utilization
Personal digital assistants
Global system for mobile communications
Base stations
5 Citations (Scopus)

Flattening properties of the mechanism of evaporation-condensation under a temperature gradient

Ogasawara, Y., 2004 Jul, In : Journal of the Physical Society of Japan. 73, 7, p. 1703-1705 3 p.

Research output: Contribution to journalArticle

nonlinear evolution equations
flattening
solid surfaces
temperature gradients
condensation
28 Citations (Scopus)

Fracture associated with hydrogen absorption of sustained tensile-loaded titanium in acid and neutral fluoride solutions

Yokoyama, K., Kaneko, K., Miyamoto, Y., Asaoka, K., Sakai, J. & Nagumo, M., 2004 Jan 1, In : Journal of Biomedical Materials Research - Part A. 68, 1, p. 150-158 9 p.

Research output: Contribution to journalArticle

Titanium
Fluorides
Acidulated Phosphate Fluoride
Hydrogen
Acids
23 Citations (Scopus)

Fracture of nickel-titanium superelastic alloy in sodium hypochlorite solution

Yokoyama, K., Kaneko, K., Yabuta, E., Asaoka, K. & Sakai, J., 2004 Mar 25, In : Materials Science and Engineering A. 369, 1-2, p. 43-48 6 p.

Research output: Contribution to journalArticle

Sodium Hypochlorite
nickel alloys
Nickel alloys
titanium alloys
Titanium alloys
31 Citations (Scopus)

Hydrogen absorption behavior of beta titanium alloy in acid fluoride solutions

Ogawa, T., Yokoyama, K., Asaoka, K. & Sakai, J., 2004 May, In : Biomaterials. 25, 12, p. 2419-2425 7 p.

Research output: Contribution to journalArticle

Acidulated Phosphate Fluoride
Fluorides
Titanium alloys
Hydrogen
Immersion
18 Citations (Scopus)

Hydrogen absorption of titanium in acidic flouride solutions

Yokoyama, K., Ogawa, T., Asaoka, K. & Sakai, J., 2004 Oct 25, In : Materials Science and Engineering A. 384, 1-2, p. 19-25 7 p.

Research output: Contribution to journalArticle

Acidulated Phosphate Fluoride
Titanium
fluorides
Hydrogen
titanium