Abstract:Gamified assessment platforms have gained popularity in K-12 education yet teacher acceptance remains a critical factor for sustained adoption. This randomized controlled trial examined teacher perceptions of a gamified formative assessment tool deployed in 24 secondary schools across Moldova over one academic semester. Teachers in the intervention group reported higher engagement scores among students and greater ease of identifying learning gaps.
Abstract:Independent disruption models underestimate tail risk when suppliers face common environmental or logistics shocks. We propose scalar resilience indices based on time-to-recover distributions under a copula-linked hazard model. Case illustrations use stylized multi-tier networks. Sensitivity analysis shows that diversification yields diminishing returns when correlation exceeds moderate levels, motivating targeted redundancy instead of uniform splitting.
Abstract:How messages are framed shapes what audiences remember days later. In a preregistered online experiment, participants read short vignettes emphasizing safety, community benefit, or scientific consensus. Delayed free recall favors consensus-oriented frames when numeric side-effect rates are also provided. We discuss ethical boundaries and implications for campaign design beyond headline testing.
Abstract:Rotating equipment health monitoring often relies on hand-crafted spectral features. We evaluate log-mel representations processed by lightweight convolutional and recurrent models on labeled vibration segments from a process plant archive. The best configuration improves area under the ROC curve relative to classical envelope analysis while keeping inference latency compatible with edge deployment.
Abstract:Biochar from peat-rich feedstocks may behave differently from wood-derived chars under oxidative aging. We subject samples to moist heat and freeze-thaw cycles while tracking surface area, pH, and volatile matter. Thermogravimetric curves shift modestly after aggressive aging, suggesting stable aromatic cores. Agronomic implications focus on cation retention and liming value rather than recalcitrance alone.
Abstract:Civic forums online depend on volunteer moderators who intervene unevenly across threads. We model rumor propagation with simple compartmental dynamics and moderator reaction times calibrated from anonymized logs. Simulations suggest that early triage on high-degree seed posts reduces cascade size more than late blanket removals. We connect findings to governance principles for transparent moderation policies.
Abstract:Large transformer models are costly to train on academic clusters. We compare structured sparsity masks, gradient accumulation regimes, and mixed-precision schedules on identical encoder architectures. Results highlight trade-offs between wall-clock time, memory footprint, and downstream task accuracy. A simple alternating block-sparse update rule reduces training cost without large quality loss on classification and retrieval benchmarks.
Abstract:Small-area estimation supports policy when direct survey estimates are unstable. We outline a Bayesian hierarchical framework that borrows strength across regions while preserving interpretable uncertainty. The approach combines unit-level covariates with spatially structured random effects. Posterior summaries align with design-based benchmarks in simulation exercises. We discuss prior sensitivity, computation with Hamiltonian Monte Carlo, and reporting guidelines for official statistics.
Abstract:Predictive policing algorithms are increasingly deployed worldwide despite unresolved concerns about fairness and accuracy. This study audited four commercially available predictive policing platforms using crime data from Sao Paulo and Accra. Spatial accuracy measured as the overlap between predicted and actual crime hotspots ranged from 52 to 68 percent across platforms. All four models disproportionately flagged neighborhoods with higher concentrations of racial minorities.
Abstract:Moringa oleifera is widely promoted as a nutritional supplement but phytochemical variation between wild and cultivated specimens across different altitudes is not well characterized. This study collected leaf samples from 60 sites spanning 200 to 1400 meters elevation in central Nepal. HPLC and spectrophotometric analyses revealed that wild populations at higher elevations contained 27 percent more total flavonoids and 19 percent higher ascorbic acid concentrations.