6 papers
Resilience-Oriented Parametric Insurance Design for Power Systems Under Extreme Weather
Jing Huang, Yawen Ma, Jiale Guo +1
Extreme weather leaves power systems exposed to residual outage risk even after physical resilience investments. Parametric insurance can provide pre-agreed contingent liquidity, b…
Interpreting Learning Under Competing Models: Joint and Stepwise Approaches for Dynamic Cognitive Diagnosis
Yawen Ma, Sahoko Ishida, Kate Cain +1
Digital learning environments record learners' responses to individual items, making it possible to study the development of specific skills rather than overall scores. Drawing con…
A Comparison of Joint and Stepwise Dynamic Cognitive Diagnostic Models
Yawen Ma, Anastasia Ushakova, Kate Cain +1
To extend cognitive diagnostic models (CDMs) to longitudinal settings, stepwise approaches that integrate a CDM model with a latent transition model and covariates are widely used…
NLP-Informed Dynamic Cognitive Diagnosis Modelling
Yawen Ma, Sahoko Ishida, Kate Cain +1
Digital learning platforms are increasingly used to support reading development while generating rich log files and item-level textual content. Using these data, this study propose…
A statistical framework for dynamic cognitive diagnosis in digital learning environments
Yawen Ma, Anastasia Ushakova, Kate Cain +1
Reading is foundational for educational, employment, and economic outcomes, but a persistent proportion of students globally struggle to develop adequate reading skills. Some count…
On Zagier's Conjecture About the Inverse of a Matrix Related to Double Zeta Values
Yawen Ma, Lee-Peng Teo
We prove a conjecture of Zagier about the inverse of a matrix using elementary methods. This formula allows one to express the the product of single z…