1 citations · 1 across the 5 of their papers we have counts for
5 papers
Nondiagonal Mixture of Dirichlet Network Distributions for Analyzing a Stock Ownership Network
Wenning Zhang, Ryohei Hisano, Takaaki Ohnishi +1
Block modeling is widely used in studies on complex networks. The cornerstone model is the stochastic block model (SBM), widely used over the past decades. However, the SBM is limi…
Fractal Patterns in Spatial Distribution of Population by Age Group
Mariko I. Ito, Takaaki Ohnishi
Multifractality is one of the patterns observed in spatial distributions of populations. In this study, we performed multifractal analysis for populations by age group in the capit…
Weighted Network Analysis of Biologically Relevant Chemical Spaces
Mariko I. Ito, Takaaki Ohnishi
In cheminformatics, network representations of the space of compounds have been suggested extensively. Among these, the threshold-network consists of nodes representing molecules.…
Structure of global buyer-supplier networks and its implications for conflict minerals regulations
Takayuki Mizuno, Takaaki Ohnishi, Tsutomu Watanabe
We investigate the structure of global inter-firm linkages using a dataset that contains information on business partners for about 400,000 firms worldwide, including all the firms…
Ecosystems perspective on financial networks: diagnostic tools
Eduardo Viegas, Misako Takayasu, Wataru Miura +4
The economical world consists of a highly interconnected and interdependent network of firms. Here we develop temporal and structural network tools to analyze the state of the econ…