5 papers
Detective scaffolding for within-session reasoning development: a three-phase framework evaluated in polymer engineering and pre-university outreach
Haolin Feng, Holly Barrett, Xinru Deng +2
This paper presents a detective scaffolding framework -- a three-phase instructional sequence (Hypothesis Activation -> Evidence Structuring -> Causal Integration) in which enginee…
Two-Phase Simulated Annealing for Equitable Team Formation: Eliminating Complaints in Large Engineering Cohorts
Yiwei Sun, Xinru Deng, Dimitrios G Papageorgiou
Contribution: This paper presents a novel two-phase algorithmic approach that decouples preference satisfaction from fairness optimization in student team formation, achieving both…
Externally Valid Selection of Experimental Sites via the k-Median Problem
José Luis Montiel Olea, Brenda Prallon, Chen Qiu +2
We present a decision-theoretic justification for viewing the question of how to best choose where to experiment in order to optimize external validity as a -median problem, a p…
Extrapolating Away from the Cutoff in Regression Discontinuity Designs
Yiwei Sun
Canonical RD designs yield credible local estimates of the treatment effect at the cutoff under mild continuity assumptions, but they fail to identify treatment effects away from t…
Effect of Composition on Microstructural Evolution during Homogenization of 7XXX Alloys
Pikee Priya, Yiwei Sun, D. R. Johnson +2
The effect of composition on microstructure both at the length scale of the secondary dendrite arm spacing and nano-sized dispersoids during homogenization of Al-Zn-Cu-Mg-Zr alloys…