5 papers
The Rich Get Richer in Bitcoin Mining Induced by Blockchain Forks
Akira Sakurai, Kazuyuki Shudo
Bitcoin is a representative decentralized currency system. For the security of Bitcoin, fairness in the distribution of mining rewards plays a crucial role in preventing the concen…
Comparing User Activity on X and Mastodon
Shiori Hironaka, Mitsuo Yoshida, Kazuyuki Shudo
The "Fediverse", a federation of decentralized social media servers, has emerged after a decade in which centralized platforms like X (formerly Twitter) have dominated the landscap…
FiberPool: Leveraging Multiple Blockchains for Decentralized Pooled Mining
Akira Sakurai, Kazuyuki Shudo
The security of blockchain systems based on Proof of Work relies on mining. However, mining suffers from unstable revenue, prompting many miners to form cooperative mining pools. M…
Clustering Coefficient Reflecting Pairwise Relationships within Hyperedges
Rikuya Miyashita, Shiori Hironaka, Kazuyuki Shudo
Hypergraphs are generalizations of simple graphs that allow for the representation of complex group interactions beyond pairwise relationships. Clustering coefficients quantify loc…
Estimation of Graph Features Based on Random Walks Using Neighbors' Properties
Tsuyoshi Hasegawa, Shiori Hironaka, Kazuyuki Shudo
Using random walks for sampling has proven advantageous in assessing the characteristics of large and unknown social networks. Several algorithms based on random walks have been in…