Tootfinder

Size-Structured Population Dynamics
Odo Diekmann, Francesca Scarabel
https://arxiv.org/abs/2506.03413 https://arxiv.org/pdf/2506.0341…

Size-Structured Population Dynamics
This chapter focuses on variable maturation delay or, more precisely, on the mathematical description of a size-structured population consuming an unstructured resource. When the resource concentration is a known function of time, we can describe the growth and survival of individuals quasi-explicitly, i.e., in terms of solutions of ordinary differential equations (ODE). Reproduction is captured by a (non-autonomous) renewal equation, which can be solved by generation expansion. After these pre…

To Measure What Isn't There -- Visual Exploration of Missingness Structures Using Quality Metrics
Sara Johansson Fernstad, Sarah Alsufyani, Silvia Del Din, Alison Yarnall, Lynn Rochester
https://arxiv.org/abs/2505.23447

To Measure What Isn't There -- Visual Exploration of Missingness Structures Using Quality Metrics
This paper contributes a set of quality metrics for identification and visual analysis of structured missingness in high-dimensional data. Missing values in data are a frequent challenge in most data generating domains and may cause a range of analysis issues. Structural missingness in data may indicate issues in data collection and pre-processing, but may also highlight important data characteristics. While research into statistical methods for dealing with missing data are mainly focusing on …