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This study investigates the impact of transportation infrastructure financed by Chinese aid on child health in 11 sub-Saharan African countries using Demographic and Health Survey data matched with the precise geospatial features of transportation infrastructure. We find that an additional year of exposure to transportation infrastructure significantly increases children's height-for-age z-scores by 0.041 standard deviations and reduces the likelihood of stunting by 1.6 percentage points among urban households without migration experience, relative to children in the control group. Our analysis, which employs mother fixed-effects specifications, yields consistent results. Notably, we find that the positive effects of transportation infrastructure are primarily attributable to exposure during the construction phase of aid projects. The increased likelihood of mothers securing paid employment during this period may serve as a critical mechanism driving the observed effects of exposure to transportation infrastructure.
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http://dx.doi.org/10.1002/hec.70035 | DOI Listing |
Talanta
September 2025
Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Oslo, 0371, Oslo, Norway; Hybrid Technology Hub - Centre of Excellence, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, 0315, Oslo, Norway. Electronic address:
Dried blood spots (DBS) offer a practical and relatively non-invasive method for sample collection. Here, we evaluate the feasibility of applying H NMR spectroscopy to metabolomic analysis of DBS. Various solvent suppression techniques and extraction protocols were tested using aqueous and methanolic solvents.
View Article and Find Full Text PDFHealth Econ
September 2025
Yangtze River Institute of International Digital Trade Innovation and Development, Nanjing University of Information Science and Technology, Nanjing, China.
This study investigates the impact of transportation infrastructure financed by Chinese aid on child health in 11 sub-Saharan African countries using Demographic and Health Survey data matched with the precise geospatial features of transportation infrastructure. We find that an additional year of exposure to transportation infrastructure significantly increases children's height-for-age z-scores by 0.041 standard deviations and reduces the likelihood of stunting by 1.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
September 2025
Department of Chemical and Biomolecular Engineering, Samueli School of Engineering, University of California, Irvine, CA 92697.
Charge and energy transport within living systems are fundamental processes that enable the autonomous function of excitable cells and tissues. To date, localized control of these transport processes has been enabled by genetic modification approaches to render light sensitivity to cells. Here, we present peptidic nanoassemblies as constituents of a cardiac biomaterial platform that leverages complementary sequence interactions to direct photoinduced energy transport at the cellular interface.
View Article and Find Full Text PDFPLoS One
September 2025
Spatial Information Research Institute, Korea Land and Geospatial Informatix Corporation, Jeonju, Jeonbuk State, South Korea.
This study introduces an expanded methodology for smart regional planning tailored to improve public service accessibility. We develop a city-level distance-time conversion factor (DCF) that utilizes regional characteristics to offer more intuitive estimates of travel times and distances in public service planning. This approach integrates three key variables: road network distances, Euclidean straight-line distances, and minimum travel times derived from both speed limits and actual traffic speeds.
View Article and Find Full Text PDFChaos
September 2025
School of Information Science and Technology, Fudan University, Shanghai 200433, China.
System reliability is a critical aspect of urban transport networks. It ensures that modern cities can provide safe, efficient, and resilient mobility services. However, existing reliability studies primarily focus on network topology and connectivity, overlooking the impact of disruptions on passenger travel quality and the temporal heterogeneity inherent in traffic patterns.
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