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2. Locational Marginal Value of Distributed Energy Resources as Non-Wires Alternatives

   https://doi.org/10.1109/TSG.2019.2921205  

   Andrianesis, Panagiotis; Caramanis, Michael; Masiello, Ralph D.; Tabors, Richard D.; Bahramirad, Shay (January 2020, IEEE Transactions on Smart Grid)

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3. Wild Bornean orangutan ( Pongo pygmaeus wurmbii ) feeding rates and the Marginal Value Theorem

   https://doi.org/10.1002/ajp.23183  

   DiGiorgio, Andrea L.; Upton, Elizabeth M.; Susanto, Tri Wahyu; Knott, Cheryl D. (August 2020, American Journal of Primatology)

   Abstract The Marginal Value Theorem (MVT) is an integral supplement to Optimal Foraging Theory (OFT) as it seeks to explain an animal's decision of when to leave a patch when food is still available. MVT predicts that a forager capable of depleting a patch, in a habitat where food is patchily distributed, will leave the patch when the intake rate within it decreases to the average intake rate for the habitat. MVT relies on the critical assumption that the feeding rate in the patch will decrease over time. We tested this assumption using feeding data from a population of wild Bornean orangutans (Pongo pygmaeus wurmbii) from Gunung Palung National Park. We hypothesized that the feeding rate within orangutan food patches would decrease over time. Data included feeding bouts from continuous focal follows between 2014 and 2016. We recorded the average feeding rate over each tertile of the bout, as well as the first, midpoint, and last feeding rates collected. We did not find evidence of a decrease between first and last feeding rates (Linear Mixed Effects Model,n = 63), between a mid‐point and last rate (Linear Mixed Effects Model,n = 63), between the tertiles (Linear Mixed Effects Model,n = 63), nor a decrease in feeding rate overall (Linear Mixed Effects Model,n = 146). These findings, thus, do not support the MVT assumption of decreased patch feeding rates over time in this large generalist frugivore. 

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4. The Arrangement of Microtubules in the Platelet Marginal Band

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5. Marginal Instability and the Efficiency of Ocean Mixing

   https://doi.org/10.1175/JPO-D-20-0083.1.  

   Smyth, William D. (January 2020, Journal of physical oceanography)

   The mixing efficiency of stratified turbulence in geophysical fluids has been the subject of considerable controversy. A simple parameterization, devised decades ago when empirical knowledge was scarce, has held up remarkably well. The parameterization rests on the assumption that the flux coefficient Γ has the uniform value 0.2. This note provides a physical explanation for Γ = 0.2 in terms of the “marginal instability” property of forced stratified shear flows, and also sketches a path toward improving on that simple picture by examining cases where it fails. 

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