27 citations
7 papers
Fractional stochastic model of citation dynamics with memory and volatility
Keisuke Okamura
Understanding the statistical laws governing citation dynamics remains a fundamental challenge in network theory and the science of science. Citation networks typically exhibit in-…
Evolving interdisciplinary contributions to global societal challenges: A 50-year overview
Keisuke Okamura
Addressing global societal challenges necessitates insights and expertise that transcend the boundaries of individual disciplines. In recent decades, interdisciplinary collaboratio…
Evolving landscape of US-China science collaboration: Convergence and divergence
Kensei Kitajima, Keisuke Okamura
International research collaboration among global scientific powerhouses has exhibited a discernible trend towards convergence in recent decades. Notably, the US and China have sig…
Atlas of Science Collaboration, 1971-2020
Keisuke Okamura
The evolving landscape of interinstitutional collaborative research across 15 natural science disciplines is explored using the open data sourced from OpenAlex. This extensive expl…
A half-century of global collaboration in science and the 'Shrinking World'
Keisuke Okamura
Recent decades have witnessed a dramatic shift in the cross-border collaboration mode of researchers, with countries increasingly cooperating and competing with one another. It is…
An Extension of Chubanov's Polynomial-Time Linear Programming Algorithm to Second-Order Cone Programming
Tomonari Kitahara, Takashi Tsuchiya
Recently, Chubanov proposed an interesting new polynomial-time algorithm for linear program. In this paper, we extend his algorithm to second-order cone programming.