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Creators/Authors contains: "Anderson, H"

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  1. IntroductionThere has been a growing realization that a more inclusive approach to research can provide both ethical and practical benefits. Long-term avian monitoring programs, and indeed the academic and research community as a whole, are still learning how best to implement these methodologies effectively. MethodsThis paper provides information on a twenty-plus-year effort to conduct community-engaged avian monitoring in northwest Ecuador, with a focus on how this approach has impacted the quality and scope of the project’s science and broader societal impacts. We focus on three case studies that have been proceeding for varying lengths of time to highlight various stages of project development and maturity. ResultsA community-engaged approach has improved the quality of our scientific research by adding traditional ecological knowledge (TEK), technical capacity, and intellectual contributions to our monitoring efforts. Community-engaged research has also enhanced the breadth and quality of societal impacts, in terms of education, capacity building, and conservation, particularly in the formation of an ecological reserve that protects threatened species and habitat. We also discuss systemic and local challenges, and potential strategies to overcome these challenges DiscussionWe conclude that community-engaged research can improve the intellectual merit and broader societal impacts of long-term avian monitoring, and we advocate for continued investment, efforts, and careful reflection on best practices in this space. 
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  2. We present the first measurement of cosmic-ray fluxes of Li 6 and Li 7 isotopes in the rigidity range from 1.9 to 25 GV. The measurements are based on 9.7 × 10 5 Li 6 and 1.04 × 10 6 Li 7 nuclei collected by the Alpha Magnetic Spectrometer on the International Space Station from May 2011 to October 2023. We observe that over the entire rigidity range the Li 6 and Li 7 fluxes exhibit nearly identical time variations and, above 4 GV , the time variations of Li 6 , Li 7 , He, Be, B, C, N, and O fluxes are identical. Above 7 GV , we find an identical rigidity dependence of the Li 6 and Li 7 fluxes. This shows that they are both produced by collisions of heavier cosmic-ray nuclei with the interstellar medium and, in particular, excludes the existence of a sizable primary component in the Li 7 flux. Published by the American Physical Society2025 
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    Free, publicly-accessible full text available May 1, 2026
  3. We report the properties of precision time structures of cosmic nuclei He, Li, Be, B, C, N, and O fluxes over an 11-year solar cycle from May 2011 to November 2022 in the rigidity range from 1.92 to 60.3 GV. The nuclei fluxes show similar but not identical time variations with amplitudes decreasing with increasing rigidity. In particular, below 3.64 GV the Li, Be, and B fluxes, and below 2.15 GV the C, N, and O fluxes, are significantly less affected by solar modulation than the He flux. We observe that these differences in solar modulation are linearly correlated with the differences in the spectral indices of the cosmic nuclei fluxes. This shows, in a model-independent way, that solar modulation of galactic cosmic nuclei depends on their spectral shape. In addition, solar modulation differences due to nuclei velocity dependence on the mass-to-charge ratio ( A / Z ) are not observed. Published by the American Physical Society2025 
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    Free, publicly-accessible full text available February 1, 2026
  4. Solid organs transport fluids through distinct vascular networks that are biophysically and biochemically entangled, creating complex three-dimensional (3D) transport regimes that have remained difficult to produce and study. We establish intravascular and multivascular design freedoms with photopolymerizable hydrogels by using food dye additives as biocompatible yet potent photoabsorbers for projection stereolithography. We demonstrate monolithic transparent hydrogels, produced in minutes, comprising efficient intravascular 3D fluid mixers and functional bicuspid valves. We further elaborate entangled vascular networks from space-filling mathematical topologies and explore the oxygenation and flow of human red blood cells during tidal ventilation and distension of a proximate airway. In addition, we deploy structured biodegradable hydrogel carriers in a rodent model of chronic liver injury to highlight the potential translational utility of this materials innovation. 
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  5. Precision measurements by the Alpha Magnetic Spectrometer (AMS) on the International Space Station of the deuteron ( D ) flux are presented. The measurements are based on 21 × 10 6 D nuclei in the rigidity range from 1.9 to 21 GV collected from May 2011 to April 2021. We observe that over the entire rigidity range the D flux exhibits nearly identical time variations with the p , He 3 , and He 4 fluxes. Above 4.5 GV, the D / He 4 flux ratio is time independent and its rigidity dependence is well described by a single power law R Δ with Δ D / He 4 = 0.108 ± 0.005 . This is in contrast with the He 3 / He 4 flux ratio for which we find Δ He 3 / He 4 = 0.289 ± 0.003 . Above 13 GV we find a nearly identical rigidity dependence of the D and p fluxes with a D / p flux ratio of 0.027 ± 0.001 . These unexpected observations indicate that cosmic deuterons have a sizable primarylike component. With a method independent of cosmic ray propagation, we obtain the primary component of the D flux equal to 9.4 ± 0.5 % of the He 4 flux and the secondary component of the D flux equal to 58 ± 5 % of the He 3 flux. Published by the American Physical Society2024 
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