Newest Papers
Hippocampal neuronal activity is aligned with action plans
Ipshita Zutshi, Athina Apostolelli, Wannan Yang, Zheyang Sam Zheng, Tora Dohi, Edoardo Balzani, Alex H. Williams, Cristina Savin, György Buzsáki
Nature·2025·15 citations
No abstract available
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View paper →Agents
Chip Huyen
Chip Huyen·2025
Intelligent agents are considered by many to be the ultimate goal of AI. The classic book by Stuart Russell and Peter Norvig, Artificial Intelligence: A Mode...
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View paper →You might just have to be bored
kate lindsay
Substack·2025
Or: How to fix an attention span.
★ 4.0 (1)
View paper →Understanding Braille and Braille Readers to Facilitate Inclusion and Foster a Sense of Belonging
Kim T. Zebehazy, M. Cay Holbrook
TEACHING Exceptional Children·2025·4 citations
No abstract available
★ 4.0 (1)
View paper →Quantum mechanics and observers for gravity in a closed universe
Daniel Harlow, Mykhaylo Usatyuk, Ying Zhao
arXiv·2025
Recent arguments based on the quantum extremal surface formula or the gravitational path integral have given fairly compelling evidence that the Hilbert space of quantum gravity in a closed universe is one-dimensional and real. How can this be consistent with the complexity of our own experiences? In this paper we propose that the experiences of any observer $Ob$ in a closed universe can be approximately described by a quantum mechanical theory with a Hilbert space whose dimension is roughly $e^{S_{Ob}}$, where $S_{Ob}$ is the number of degrees of freedom of $Ob$. Moreover we argue that the errors in this description are exponentially small in $S_{Ob}$. We give evidence for this proposal using the gravitational path integral and the coding interpretation of holography, and we explain how similar effects arise in black hole physics in appropriate circumstances.
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View paper →Upper Limits on the Mass of Cool Gas in the Circumgalactic Medium of Dwarf Galaxies
Yakov Faerman, Yong Zheng, Benjamin D. Oppenheimer
arXiv·2025
We use HI absorption measurements to constrain the amount of cool ($\approx 10^4$ K), photoionized gas in the circumgalactic medium (CGM) of dwarf galaxies with $M_* = 10^{6.5-9.5}~M_\odot$ in the nearby Universe ($z<0.3$). We show analytically that volume-filling gas gives an upper limit on the gas mass needed to reproduce a given HI column density profile. We introduce a power-law density profile for the gas distribution and fit our model to archival HI observations to infer the cool CGM gas mass, $M_{\rm cCGM}$, as a function of halo mass. For volume-filling ($f_V=1$) models, we find $M_{\rm cCGM} = 5 \times 10^8-2 \times 10^9~M_{\odot}$, constituting $\lesssim 10\%$ of the halo baryon budget. For clumpy gas, with $f_V=0.01$, the masses are a factor of $\approx 11$ lower, in agreement with our analytic approximation. Our assumption that the measured HI forms entirely in the cool CGM provides a conservative upper limit on $M_{\rm cCGM}$, and possible contributions from the intergalactic medium or warm/hot CGM will further strengthen our result. We estimate the mass uncertainties due to the range of redshifts in our sample and the unknown gas metallicity to be $\approx 15\%$ and $\approx 10\%$, respectively. Our results show that dwarf galaxies have only $\lesssim 15\%$ of their baryon budget in stars and the cool CGM, with the rest residing in the warm/hot CGM or ejected from the dark matter halos.
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View paper →H$α$-X-ray Surface Brightness Correlation for Filaments in Cooling Flow Clusters
Valeria Olivares, Adrien Picquenot, Yuanyuan Su, Massimo Gaspari, Marie-Lou Gendron-Marsolais, Fiorella L. Polles, Paul Nulsen
arXiv·2025
Massive galaxies in cooling flow clusters display clear evidence of feedback from Active Galactic Nuclei (AGN). Joint X-ray and radio observations have shown that AGN radio jets push aside the surrounding hot gas and form cavities in the hot intracluster medium (ICM). These systems host complex, kiloparsec-scale, multiphase filamentary structures, from warm ionized (10,000 K) to cold molecular ($<$100 K). These striking clumpy filaments are believed to be a natural outcome of thermally unstable cooling from the hot ICM, likely triggered by feedback processes while contributing to feeding the AGN via Chaotic Cold Accretion (CCA). However, the detailed constraints on the formation mechanism of the filaments are still uncertain, and the connection between the different gas phases has to be fully unveiled. By leveraging a sample of seven X-ray bright cooling-flow clusters, we have discovered a tight positive correlation between the X-ray surface brightness and the H$α$ surface brightness of the filaments over two orders of magnitude, as also found in stripped tails.
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View paper →The Racial Question of Palestine and the Question of Anti-Racism in Palestine
Shaira Vadasaria
Journal of Palestine Studies·2025·2 citations
No abstract available
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View paper →Experiences of Italian Asexual and Aromantic Individuals in Healthcare Settings: from Explicitly Aggressive to Affirming Interactions
Sofia Pavanello Decaro, Antonio Prunas, Ben Servi, Cinzia Albanesi, Maric Martin Lorusso
Journal of LGBTQ Issues in Counseling·2025·3 citations
Asexual and aromantic spectrum identities (ASPEC) experience stigma and invisibility and are at risk of worse mental health outcomes. Healthcare providers lack knowledge on the topic of asexuality and aromanticism, resulting in intentional or unintentional discriminations. The present study explores the interactions of ASPEC people with healthcare providers. We used Codebook Thematic Analysis, a qualitative methodology based on an online questionnaire completed by 284 ASPEC people. The six resulting themes ranged from Manifest aggression to Microaffirmation. Participants’ experiences highlight that clinical settings are often unsupportive spaces, exposing them to greater vulnerability and pointing to the lack of training for professionals.
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View paper →Avances en la investigación de venenos de serpientes mexicanas y sus antivenenos: una revisión actualizada
Edgar Neri-Castro, Vanessa Gómez, Miguel Borja, Jorge López de León, Alejandro Alagón
Toxicología Clínica·2025·1 citations
No abstract available
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View paper →The urgent challenge of ocean pollution: Impacts on marine biodiversity and human health
C. Thiagarajan, Yuvarajan Devarajan
Regional Studies in Marine Science·2025·10 citations
No abstract available
★ 3.0 (1)
View paper →The Welfare and General-Equilibrium Impacts of Aid Cuts
Olivier Sterck, Vittorio Bruni
2025·1 citations
No abstract available
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