Abstract:Lightweight lattice heat exchangers must survive cyclic thermal gradients during startup–shutdown. Selective laser melting produces struts with surface roughness and microstructural gradients that alter crack initiation sites. Isothermal and out-of-phase thermomechanical tests on dogbone specimens extracted from unit cells reveal shorter lives than bulk wrought material at matched stress amplitudes, motivating post-process hot isostatic pressing to close internal porosity.
Abstract:Joint-liability loans may crowd in business skills when peer monitoring substitutes for collateral. We randomize invitations to form new lending circles among women operating informal retail stalls. Intent-to-treat estimates show higher inventory turnover and formal savings account uptake relative to a wait-list control, with no significant increase in household debt stress measured twelve months post-enrollment.
Abstract:Light-trap surveys are labour-intensive and taxonomically biased toward certain families. We deploy low-cost recorders along forest–pasture edges and train a convolutional network on expert-labelled chirp and stridulation events. Hold-out nights recover known guild turnover across seasons with fewer false positives than template-matching baselines, enabling nightly activity indices that correlate with concurrent pitfall abundance for selected ground-beetle groups.
Abstract:Multi-site trials require demonstrable integrity of consent documentation without exposing identifiable participant data on public ledgers. We prototype a permissioned chain that stores salted hashes of consent PDFs alongside investigator signatures and protocol version identifiers. Pilot deployment across three ethics-approved studies shows faster reconciliation during monitoring visits than email-based version control while meeting local data-residency constraints.
Abstract:Raised bogs preserve pollen archives that record regional vegetation shifts with decadal resolution. Two new cores spanning the last three millennia show alternating dominance of birch and pine with abrupt increases in cereal-type pollen after medieval land-use intensification. Multivariate ordination links compositional turnover to independent peat humification indices, supporting a coupled climate–land-use interpretation rather than single forcing.
Abstract:Fixed-time signal plans underperform when demand fluctuates within the day. We train deep Q-network agents on a calibrated microscopic simulator with realistic turning proportions and pedestrian minimum greens. Compared with Webster-style actuated control, learned policies reduce average vehicle delay and queue length on a representative four-leg intersection without increasing pedestrian maximum wait beyond regulatory limits.
Abstract:Seasonal migration and shared water points may constrain both hydration and food preparation. We administered a validated water-insecurity scale alongside a household dietary diversity score to 412 pastoral households during dry and wet seasons. Higher insecurity is associated with lower diversity indices after adjusting for livestock holdings and market distance, suggesting integrated interventions should pair storage infrastructure with nutrition counselling.
Abstract:Deploying recurrent predictors on microcontrollers is constrained by memory and multiply-accumulate budgets. We prepend a tiny multi-head attention readout to an echo state reservoir whose recurrent weights remain random and fixed. On standard chaotic benchmarks and a wind-speed telemetry set, the hybrid model reaches lower normalized error than purely linear readouts while staying within sixty kilobytes of weight storage on a representative ARM Cortex-M4 platform.
Abstract:Centralized biogas plants near wholesale markets can divert putrescible fractions from open dumping yet digestate quality is variable. We monitored a one-year pilot digester fed with sorted vegetable trimmings and co-digested manure, then field-tested liquid and solid digestate fractions on rainfed cereals. Yields and soil organic carbon gains matched mineral fertilizer controls on light soils when digestate was applied at agronomically calibrated nitrogen rates.
Abstract:Typological tables of transport jars are high-dimensional and sparse when sites preserve partial cargoes. We represent assemblages as compositional vectors over fabric and form classes, then cluster wrecks with affinity propagation to avoid specifying cluster counts a priori. The recovered groupings align with known production regions in most cases and suggest a plausible corridor for understudied eastern variants that lack secure stamps.