arXiv subjects

Rikako Kono

Publications and source records attributed to Rikako Kono.

4 recordsLinked to original sources

arXiv2026

Right Move, Right Time: Multi-Sport Space Evaluation Platform for Ultimate Frisbee, Basketball, and Soccer

We present an open, sport-agnostic platform that turns tracking into comparable spatial measures across professional Ultimate, basketball, and soccer. Coaches in all three sports ask the same question: where is the usable space, and when should an off-ball run start? Our workflow standardizes inputs, provides timing-aware spatial evaluations, and makes it possible to reuse the same analysis across sports. We illustrate the approach with Ultimate as a focused testbed and then examine transfer between basketball and soccer. Together, these results show a practical path toward consistent, comparable evaluation across various invasion sports.

cs.HC↗

arXiv2025

A Compact Two-Dimensional Radiation Detector for Educational Applications

Recent advances in low-cost, portable cosmic-ray detectors have broadened citizen-science engagement in particle physics studies. Imaging applications such as muography, however, remain largely inaccessible because existing detectors typically require tens to hundreds of sensors, making them costly and complex. This gap underscores the need for a compact imaging detector. In this study, we developed SAKURA, a palm-sized two-dimensional muon scintillation detector that uses only four silicon photomultipliers (SiPMs) and can be built for less than 1,000 USD. Its spatial resolution was evaluated using a 5 GeV/c muon beam at CERN's T10 beamline in September 2024, yielding 13.4 mm along the x-axis and 7.48 mm along the y-axis. The entire study, including designing and testing the detector, and analysing data, was undertaken by high school students, demonstrating that SAKURA makes radiation imaging accessible and practical even for non-specialists with the help of some professional scientists.

physics.ins-det↗

arXiv2024

Mathematical models for off-ball scoring prediction in basketball

In professional basketball, the accurate prediction of scoring opportunities based on strategic decision-making is crucial for spatial and player evaluations. However, traditional models often face challenges in accounting for the complexities of off-ball movements, which are essential for comprehensive performance evaluations. In this study, we propose two mathematical models to predict off-ball scoring opportunities in basketball, considering pass-to-score and dribble-to-score sequences: the Ball Movement for Off-ball Scoring (BMOS) and the Ball Intercept and Movement for Off-ball Scoring (BIMOS) models. The BMOS model adapts principles from the Off-Ball Scoring Opportunities (OBSO) model, originally designed for soccer, to basketball, whereas the BIMOS model also incorporates the likelihood of interception during ball movements. We evaluated these models using player tracking data from 630 NBA games in the 2015-2016 regular season, demonstrating that the BIMOS model outperforms the BMOS model in terms of team scoring prediction accuracy, while also highlighting its potential for further development. Overall, the BIMOS model provides valuable insights for tactical analysis and player evaluation in basketball.

cs.LG↗

arXiv2021

Collaboration between high schools in Japan and Argentina for cosmic-ray research using CosmicWatches

Cosmic rays are ubiquitous and readily available, making them a good teaching tool for particle and astrophysics by young students. Tan-Q is an inclusive outreach and educational project, providing students in Japanese junior-high or high schools with research opportunities to join cosmic-ray and particle physics. In the Tan-Q framework, the students in each school conduct their research with help from mentors who are mainly undergraduate students. Researchers are also extensively involved through regular Zoom meetings and continuous communication on Slack. Some cases are inter-school, and some are international. This paper presents one of the Tan-Q activities of joint research between high schools in Japan and Argentina to observe cosmic-ray muons using CosmicWatches. Our primary goal is to investigate the muon flux differences due to the differences in circumstances like altitudes and geomagnetic field strengths. Those involved learn not only particle physics but also statistical data analysis methods.

physics.ed-ph↗