Each year the Margaret Chase Smith Library sponsors an essay contest for high school seniors. The prompt 2023 asked students to consider what proper role of government should be in responding issues surrounding climate change.

Chase-escape percolation is a variation of the standard epidemic spread models. In this model, each site can be in one three states: unoccupied, occupied by single prey, or predator. Prey particles to neighboring empty sites at rate $p$, and predator only prey $1$, killing particle that existed site. It was found survive with non-zero probability, if $p>p_c$ $p_c<1$. Using Monte Carlo simulatio...

We describe a range of interactions of maternal intrusion and infant avoidance, based on microanalysis of videotaped face-to-face play between mothers and 4-month infants. After a brief review of our theory of interaction, and approach to microanalysis, we describe the following interaction patterns: facial mirroring, chase and dodge, chase and dodge in a mother infant treatment case, vocal rhy...

The restricted chase is a sound and complete algorithm for conjunctive query answering over ontologies of disjunctive existential rules. We develop acyclicity conditions to ensure its termination. Our criteria cannot always detect termination (the problem is undecidable), and we develop the first cyclicity criteria to show non-termination of the restricted chase. Experiments on real-world ontol...

We study various degrees of completeness for a Tychonoff space X. One of them plays a central role, namely X is called a Conway space if X is sequentially closed in its Stone–Čech compactification βX (a prominent example of Conway spaces is provided by Dieudonné complete spaces). The Conway spaces constitute a bireflective subcategory Conw of the category Tych of Tychonoff spaces. Replacing seq...