746 citations · 2.2k across the 41 of their papers we have counts for
41 papers
Berezinskii-Kosterlitz-Thouless-type Transition in Site Percolation on the Diamond Hierarchical Lattice
Takehisa Hasegawa, Kazuki Wataya, Tomoaki Nogawa
We study site percolation on the diamond hierarchical lattice, a finite-dimensional fractal network, using an exact generating-function analysis. In contrast to bond percolation, s…
Optimal Network Robustness Against Attacks in Varying Degree Distributions
Masaki Chujyo, Yukio Hayashi, Takehisa Hasegawa
In varying degree distributions, we investigate the optimally robust networks against targeted attacks to nodes with higher degrees. In considering that a network tends to have mor…
Revisiting finite size effect of percolation in degree correlated networks
Shogo Mizutaka, Takehisa Hasegawa
In this study, we investigate bond percolation in networks that have the Poisson degree distribution and a nearest-neighbor degree-degree correlation. Previous numerical studies on…
Cascading behavior of an extended Watts model on networks
Shinji Nishioka, Takehisa Hasegawa
In this study, we propose an extended Watts model to examine the effect of initiators on information cascades. The extended Watts model assumes that nodes with connections to initi…
Impact of assortative mixing by mask-wearing on the propagation of epidemics in networks
Hiromu Watanabe, Takehisa Hasegawa
In this study, we discuss the impacts of assortative mixing by mask-wearing on the effectiveness of mask use in suppressing the propagation of epidemics. We employ the mask model,…
Synergistic epidemic spreading in correlated networks
Shogo Mizutaka, Kizashi Mori, Takehisa Hasegawa
We investigate the effect of degree correlation on a susceptible-infected-susceptible (SIS) model with a nonlinear cooperative effect (synergy) in infectious transmissions. In a me…
Search for neutrinos in coincidence with gravitational wave events from the LIGO-Virgo O3a Observing Run with the Super-Kamiokande detector
Kamiokande collaboration, K. Abe, C. Bronner +209
The Super-Kamiokande detector can be used to search for neutrinos in time coincidence with gravitational waves detected by the LIGO-Virgo Collaboration (LVC). Both low-energy ($7-1…
Emergence of Long-Range Correlations in Random Networks
Shogo Mizutaka, Takehisa Hasegawa
We perform an analytical analysis of the long-range degree correlation of the giant component in an uncorrelated random network by employing generating functions. By introducing a…
Structure of percolating clusters in random clustered networks
Takehisa Hasegawa, Shogo Mizutaka
We examine the structure of the percolating cluster (PC) formed by site percolation on a random clustered network (RCN) model. Using the generating functions, we formulate the clus…
Percolation on a maximally disassortative network
Shogo Mizutaka, Takehisa Hasegawa
We propose a maximally disassortative (MD) network model which realizes a maximally negative degree-degree correlation, and study its percolation transition to discuss the effect o…
Observability transitions in clustered networks
Takehisa Hasegawa, Yuta Iwase
We investigate the effect of clustering on network observability transitions. In the observability model introduced by Yang, Wang, and Motter [Phys. Rev. Lett. 109, 258701 (2012)],…
Disassortativity of percolating clusters in random networks
Shogo Mizutaka, Takehisa Hasegawa
We provide arguments for the property of the degree-degree correlations of giant components formed by the percolation process on uncorrelated random networks. Using the generating…
Efficiency of prompt quarantine measures on a susceptible-infected-removed model in networks
Takehisa Hasegawa, Koji Nemoto
This study focuses on investigating the manner in which a prompt quarantine measure suppresses epidemics in networks. A simple and ideal quarantine measure is considered in which a…
Sudden spreading of infections in an epidemic model with a finite seed fraction
Takehisa Hasegawa, Koji Nemoto
We study a simple case of the susceptible-weakened-infected-removed model in regular random graphs in a situation where an epidemic starts from a finite fraction of initially infec…
Local cluster-size statistics in the critical phase of bond percolation on the Cayley tree
Tomoaki Nogawa, Takehisa Hasegawa, Koji Nemoto
We study bond percolation of the Cayley tree (CT) by focusing on the probability distribution function (PDF) of a local variable, namely, the size of the cluster including a select…
Outbreaks in susceptible-infected-removed epidemics with multiple seeds
Takehisa Hasegawa, Koji Nemoto
We study a susceptible-infected-removed (SIR) model with multiple seeds on a regular random graph. Many researchers have studied the epidemic threshold of epidemic models above whi…
Measurements of the atmospheric neutrino flux by Super-Kamiokande: energy spectra, geomagnetic effects, and solar modulation
E. Richard, K. Okumura, K. Abe +126
A comprehensive study on the atmospheric neutrino flux in the energy region from sub-GeV up to several TeV using the Super-Kamiokande water Cherenkov detector is presented in this…
Critical Phase in Complex Networks: a Numerical Study
Takehisa Hasegawa, Tomoaki Nogawa, Koji Nemoto
We compare phase transition and critical phenomena of bond percolation on Euclidean lattices, nonamenable graphs, and complex networks. On a Euclidean lattice, percolation shows a…
Hierarchical scale-free network is fragile against random failure
Takehisa Hasegawa, Koji Nemoto
We investigate site percolation in a hierarchical scale-free network known as the Dorogovtsev- Goltsev-Mendes network. We use the generating function method to show that the percol…
Suppressing epidemics on networks by exploiting observer nodes
Taro Takaguchi, Takehisa Hasegawa, Yuichi Yoshida
To control infection spreading on networks, we investigate the effect of observer nodes that recognize infection in a neighboring node and make the rest of the neighbor nodes immun…
Transition-type change between an inverted Berezinskii-Kosterlitz-Thouless transition and an abrupt transition in the bond percolation on a random hierarchical small-world network
Tomoaki Nogawa, Takehisa Hasegawa
We study bond percolation on a one-parameter family of hierarchical small-world network, and find a meta-transition between the inverted BKT transition and the abrupt transition dr…
Observability transitions in correlated networks
Takehisa Hasegawa, Taro Takaguchi, Naoki Masuda
Yang, Wang, and Motter [Phys. Rev. Lett. 109, 258701 (2012)] analyzed a model for network observability transitions in which a sensor placed on a node makes the node and the adjace…
Discontinuous Transition of a Multistage Independent Cascade Model on Networks
Takehisa Hasegawa, Koji Nemoto
We propose a multistage version of the independent cascade model, which we call a multistage independent cascade (MIC) model, on networks. This model is parameterized by two probab…
Absence of the non-percolating phase for percolation on the non-planar Hanoi network
Takehisa Hasegawa, Tomoaki Nogawa
We investigate bond percolation on the non-planar Hanoi network (HN-NP), which was studied in [Boettcher et al. Phys. Rev. E 80 (2009) 041115]. We calculate the fractal exponent of…