Updated economic geography model incorporates heterogeneity in firm productivity and environmental pollution
Peer-Reviewed Publication
Updates every hour. Last Updated: 10-Jul-2025 07:10 ET (10-Jul-2025 11:10 GMT/UTC)
In regional and urban economics, theoretical models are developed to predict patterns of regional development based on real-world factors. Such models in economic geography can inform regional and urban development policies aimed at promoting economic growth and fostering sustainable regional development.
Researchers from the Institute of Industrial Science, The University of Tokyo have developed a filter that effectively blocks small particles while allowing unrestricted air flow. Such a filter is attractive for use in face masks that are highly effective while maintaining wearer comfort. The filter is constructed from nanosheets consisting of a mesh containing tiny pores supported on a nanofiber-coated fabric with larger pores. This hierarchical pore structure blocks nanoparticles while allowing air flow.
Researchers at The University of Osaka have developed a non-precious metal catalyst for the efficient hydrogenation of biomass-derived furfural to valuable tetrahydrofuran-based compounds under mild conditions. The catalyst, consisting of nickel carbide nanoparticles supported on alumina, achieved 90% furfural conversion under ambient hydrogen pressure. This result will help advance the development of energy-efficient, cost-effective processes for the conversion of biomass to valuable materials.
Scientists developed a smartphone-compatible ethanol sensor using a metal–organic framework called Cu-MOF-74. The sensor visually detects ethanol concentrations across a wide range, with no electronics or lab tools required. This technology has promising applications in environmental monitoring, healthcare, industrial processes, and alcohol breath analysis.