128 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Nagoya UniversityJP20 papers
- The University of TokyoJP5 papers
- National Astronomical Observatory of JapanJP4 papers
- Clemson UniversityUS3 papers
- Kogakuin UniversityJP3 papers
- National Institute of TechnologyJP2 papers
- Tohoku UniversityJP2 papers
- Advanced Science Research CenterJP1 paper
- Christian-Albrechts-Universität zu KielDE1 paper
- Chuo UniversityJP1 paper
- ETH ZurichCH1 paper
- Hokkaido UniversityJP1 paper
27 papers
Direct Observation of the Zigzag Edge States of a Supramolecular Diatomic Kagome Lattice
Ryohei Nemoto, Xiangzhi Meng, Behzad Mortezapour +11
Lattice geometry plays a fundamental role in the behavior of Bloch electrons in a crystal. The diatomic Kagome lattice, an extension of the honeycomb and Kagome lattices, is predic…
Evasive Ransomware Attacks Using Low-level Behavioral Adversarial Examples
Manabu Hirano, Ryotaro Kobayashi
Protecting state-of-the-art AI-based cybersecurity defense systems from cyber attacks is crucial. Attackers create adversarial examples by adding small changes (i.e., perturbations…
Hypervisor-based Double Extortion Ransomware Detection Method Using Kitsune Network Features
Manabu Hirano, Ryotaro Kobayashi
Double extortion ransomware attacks have become mainstream since many organizations adopt more robust and resilient data backup strategies against conventional crypto-ransomware. T…
Revealing the hidden dynamics of confined water in acrylate polymers: Insights from hydrogen-bond lifetime analysis
Kokoro Shikata, Takuma Kikutsuji, Nobuhiro Yasoshima +2
Polymers contain functional groups that participate in hydrogen bond (H-bond) with water molecules, establishing a robust H-bond network that influences bulk properties. This study…
Machine Learning-based Ransomware Detection Using Low-level Memory Access Patterns Obtained From Live-forensic Hypervisor
Manabu Hirano, Ryotaro Kobayashi
Since modern anti-virus software mainly depends on a signature-based static analysis, they are not suitable for coping with the rapid increase in malware variants. Moreover, even w…
Discretized Wiener-Khinchin theorem for Fourier-Laplace transformation: application to molecular simulations
Akira Koyama, David A. Nicholson, Marat Andreev +3
The Wiener-Khinchin theorem for the Fourier-Laplace transformation (WKT-FLT) provides a robust method to calculate numerically single-side Fourier transforms of arbitrary autocorre…
Effect of Coulomb Interaction on Seebeck Coefficient of Organic Dirac Electron System -(BEDT-TTF)I
Daigo Ohki, Yukiko Omori, Akito Kobayashi
Motivated by the results of recent thermoelectric effect studies, we show the effects of Coulomb interactions on the Seebeck coefficient based on an extended Hubbard model that des…
Domain Wall Conductivity with strong Coulomb interaction of two-dimensional massive Dirac Electrons in the Organic Conductor -(BEDT-TTF)I
Daigo Ohki, Yukiko Omori, Akito Kobayashi
Motivated by the results of recent transport and optical conductivity studies, we propose a semi-infinite two-dimensional lattice model for interacting massive Dirac electrons in t…
On the Brauer group of affine diagonal quadrics
Tetsuya Uematsu
In a previous work, we introduced the notion of uniform generators of the Brauer group and proved that general diagonal cubic surfaces do not have such generators. In this paper, w…
Electrical permittivity driven metal-insulator transition in heterostructures of nonpolar Mott- and band insulators
Yukiko Omori, Andreas Rüegg, Manfred Sigrist
Metallic interfaces between insulating perovskites are often observed in heterostructures combining polar and nonpolar materials. In these systems, the polar discontinuity across t…
Supernova neutrino signals by liquid Argon detector and neutrino magnetic moment
Takashi Yoshida, Akira Takamura, Keiichi Kimura +3
We study electron-neutrino and electron-antineutrino signals from a supernova with strong magnetic field detected by a 100 kton liquid Ar detector. The change of neutrino flavors b…
Resonant Spin-Flavor Conversion of Supernova Neutrinos: Dependence on Electron Mole Fraction
T. Yoshida, A. Takamura, K. Kimura +3
Detailed dependence of resonant spin-flavor (RSF) conversion of supernova neutrinos on electron mole fraction Ye is investigated. Supernova explosion forms a hot-bubble and neutrin…
Neutrino-Nucleus Reaction Cross Sections for Light Element Synthesis in Supernova Explosions
T. Yoshida, T. Suzuki, S. Chiba +5
The neutrino-nucleus reaction cross sections of 4He and 12C are evaluated using new shell model Hamiltonians. Branching ratios of various decay channels are calculated to evaluate…
Avoiding the uncertainty from correlation between |Delta m_{31}^2| and CP phase delta in nu_mu --> nu_mu long baseline experiments
Keiichi Kimura, Akira Takamura, Tadashi Yoshikawa
We introduce a new index I_{Delta m_{31}^2} to find where is the better setup of the baseline length and energy to avoid as well as possible the uncertainty from the correlation be…
Effect of Leptonic CP Phase in nu_mu --> nu_mu Oscillations
Keiichi Kimura, Akira Takamura, Tadashi Yoshikawa
In the case of large 1-3 mixing angle as sin^2(2theta13 > 0.03, we investigate the possibility for measuring the leptonic CP phase by using only nu_mu --> nu_mu oscillations indepe…
Neutrino Oscillation Effects on Supernova Light Element Synthesis
T. Yoshida, T. Kajino, H. Yokomakura +3
Neutrino oscillations affect light element synthesis through the neutrino-process in supernova explosions. The 7Li and 11B yields produced in a supernova explosion of a 16.2 solar-…
Measuring the Leptonic CP Phase in Oscillations
Keiichi Kimura, Akira Takamura, Tadashi Yoshikawa
In oscillations, we find that the effect of the CP phase becomes large in the region GeV and km. In this region, the change of the probability in t…
New Index of CP Phase Effect and Screening in Long Baseline Neutrino Experiments
Keiichi Kimura, Akira Takamura, Tadashi Yoshikawa
We introduce a new index of the leptonic CP phase dependence and derive the maximal condition for this index in a simple and general form. may…
Supernova Neutrino Nucleosynthesis of Light Elements with Neutrino Oscillations
T. Yoshida, T. Kajino, H. Yokomakura +3
Light element synthesis in supernovae through neutrino-nucleus interactions, i.e., the nu-process, is affected by neutrino oscillations in the supernova environment. There is a res…
Large Non-perturbative Effects of Small Δm^2_{21}/Δm^2_{31} and \sin θ_{13} on Neutrino Oscillation and CP Violation in Matter
Akira Takamura, Keiichi Kimura
In the framework of three generations, we consider the CP violation in neutrino oscillation with matter effects. At first, we show that the non-perturbative effects of two small pa…
MeV ion-induced strain at nanoisland-semiconductor surface and interfaces
J. Ghatak, B. Satpati, M. Umananda +4
Strain at surfaces and interfaces play an important role in the optical and electronic properties of materials. MeV ion-induced strain determination in single crystal silicon subst…
Enhancement of CP Violating terms for Neutrino Oscillation in Earth Matter
Keiichi Kimura, Akira Takamura, Hidekazu Yokomakura
We investigate the oscillation in the framework of three generations when neutrinos pass through the earth. The oscillation probability is represented by the form, $P…
Proposal of a Simple Method to Estimate Neutrino Oscillation Probability and CP Violation in Matter
Akira Takamura, Keiichi Kimura, Hidekazu Yokomakura
We study neutrino oscillation within the framework of three generations in matter. We propose a simple method to approximate the coefficients A, B and C which do not depend on the…
Overall Feature of CP dependence for Neutrino Oscillation Probability in Arbitrary Matter Profile
Hidekazu Yokomakura, Keiichi Kimura, Akira Takamura
We study the CP dependence of neutrino oscillation probability for all channels in arbitrary matter profile within three generations. We show that an oscillation probability for ν_…