50 citations · 141 across the 19 of their papers we have counts for
6 papers · 1 filter
Quantifying defensive pressure on the ball carrier in soccer based on minimum arrival time
Takuma Narizuka, Ikuya Sakamoto, Ken Yamamoto +1
Defensive pressure on the ball carrier is a fundamental component of soccer tactics. Existing pressure measures often involve additional modeling assumptions, which may reduce inte…
Analysis of size distributions of fictional characters: from Pokémon to Godzilla
Ken Yamamoto
In this letter, the size (height and weight) of fictional characters in animations, superhero series, movies, and other media is studied. We find that the distributions of characte…
Theory and data analysis of player and team ball possession time in football
Ken Yamamoto, Seiya Uezu, Keiichiro Kagawa +2
In this study, the stochastic properties of player and team ball possession times in professional football matches are examined. Data analysis shows that player possession time fol…
Degree distribution of position-dependent ball-passing networks in football games
Takuma Narizuka, Ken Yamamoto, Yoshihiro Yamazaki
We propose a simple stochastic model describing the position-dependent ball-passing network in football games. In this network, a player on a certain area in the divided fields is…
A simple view of the heavy-tailed sales distributions and application to the box-office grosses of U.S. movies
Ken Yamamoto
This letter treats of the power-law distribution of the sales of items. We propose a simple stochastic model which expresses a selling process of an item. This model produces a sta…
Structure and modeling of the network of two-Chinese-character compound words in the Japanese language
Ken Yamamoto, Yoshihiro Yamazaki
This paper proposes a numerical model of the network of two-Chinese-character compound words (two-character network, for short). In this network, a Chinese character is a node and…