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Control optimization of air traffic emissions in a two-variable dynamic model.
Sci Rep
January 2025
Department of Physics and Mathematics, University of Alcalá, Alcalá de Henares, Spain.
Since 1999, every report released by the International Panel on Climate Change has advocated a decrease in the greenhouse gas emissions associated with aviation in order to preserve the current climate. This study used a two variable differential equations model with a non-linear control term to address several aspects of the emissions stabilization issue. By optimizing the control term parameter, several management alternatives can be obtained based on the properties of the phase plane of the model solutions, as identified by a stability analysis.
View Article and Find Full Text PDFA distinct hypothalamus-habenula circuit governs risk preference.
Nat Neurosci
January 2025
Brain Research Institute, University of Zurich, Zurich, Switzerland.
Appropriate risk evaluation is essential for survival in complex, uncertain environments. Confronted with choosing between certain (safe) and uncertain (risky) options, animals show strong preference for either option consistently across extended time periods. How such risk preference is encoded in the brain remains elusive.
View Article and Find Full Text PDFTask relevant autoencoding enhances machine learning for human neuroscience.
Sci Rep
January 2025
Department of Cognitive Sciences, University of California, 2201 Social & Behavioral Sciences Gateway, Irvine, CA, 92697, USA.
In human neuroscience, machine learning can help reveal lower-dimensional neural representations relevant to subjects' behavior. However, state-of-the-art models typically require large datasets to train, and so are prone to overfitting on human neuroimaging data that often possess few samples but many input dimensions. Here, we capitalized on the fact that the features we seek in human neuroscience are precisely those relevant to subjects' behavior rather than noise or other irrelevant factors.
View Article and Find Full Text PDFRevisiting episodic-like memory in scrub jays: Is there more we can still learn from what-where-when caching behaviour?
Learn Behav
January 2025
Department of Psychology, University of Cambridge, Cambridge, UK.
Professor Nicola Clayton is perhaps best known for her work on food-caching scrub jays. Her seminal 1998 paper, together with Anthony Dickinson, showed that scrub jays could remember what food they had cached, where and how long ago, suggesting memory ability that is 'episodic-like' in nature. Here, we present data from a previously unpublished study that sought to replicate and extend these findings.
View Article and Find Full Text PDFPET Imaging of Sphingosine-1-Phosphate Receptor 1 with [F]TZ4877 in Nonhuman Primates.
Mol Imaging Biol
January 2025
Yale PET Center, Yale School of Medicine, New Haven, USA.
Purpose: The sphingosine-1-phosphate receptor-1 (S1PR) is involved in regulating responses to neuroimmune stimuli. There is a need for S1PR-specific radioligands with clinically suitable brain pharmcokinetic properties to complement existing radiotracers. This work evaluated a promising S1PR radiotracer, [F]TZ4877, in nonhuman primates.
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