School Choice with Hybrid Schedules

During the pandemic, school districts have adopted hybrid schedules to continue the education of the students while maintaining social distance. In a hybrid schedule, students in the same classroom are usually divided into two groups and students only in the same group can physically attend class together two days a week. School districts do not take preferences of the students/parents over the days they would like to come to school into account during this procedure. In this paper, we propose a solution that divides students into groups based on their preferences. Our solution respects the number of classrooms initially reserved for each grade and enables possible efficiency gains by swapping classrooms across grades. Moreover, when there are two alternative schedules provided for students, our solution is immune to preference manipulations.

A New Performance Strategy for a Twelve-Station, One-Day York Cycle

One of the challenges of the York pageant cycle is understanding how up to fifty pageants could have been performed at each one of ten to seventeen stations within the span of a single day. This paper proposes a new model of York’s performance strategy based on staggered starting points. The strategy proposed here offers not only a complete, workable one-day cycle, but also a new breakdown of the pageants into four thematically rich subgroups. An appendix provides a schedule of the full playing day, plus timing calculations and alternative schedules accounting for varying numbers of stations and plays.

Cross-Over Efficiency Comparison of Different Tidal Automated Peritoneal Dialysis Schedules

This study compares 5 different tidal automated peritoneal dialysis (APD) prescriptions. Six low-average and 6 high-average transporters performed 3 separate sessions with 5 different schedules: (A) 50% tidal with initial fill volume (FV) 2 liters, (B) 50% tidal with 2.2 liters initial FV, (C) 2.2 liters initial FV with 70% tidal, (D) as in B, with one complete renewal of the initial FV at midsession, (E) 2.2 liters FV with breakpoint modality. Urea, creatinine and phosphate peritoneal clearances, sodium removal and ultrafiltration (UF) were compared using analysis of variance. Compared to treatment A, all the tested alternative schedules were associated with 10% significantly higher urea clearance; B, D and E, but not C, were associated with 10% higher creatinine clearance. Phosphate clearance was significantly higher with D, while sodium removal was larger with both C and D. UF was lower with A and E in high average transporters. Manipulation of the main prescriptive parameters of tidal APD has significant impact on its efficiency.