Tootfinder

from my link log —
Rewriting the heart of Dropbox's sync engine in Rust.
https://dropbox.tech/infrastructure/rewriting-the-heart-of-our-sync-engine
saved 2020-03-17

Rewriting the heart of our sync engine

Tech Goliaths are scrambling to build as much AI computing capacity as they possibly can, come hell or low water.
One of the dominant players in the space, Amazon Web Services, has its heart set on an AI data center so enormous that it could easily become 💥the largest source of carbon dioxide emissions in the United States.
According to the New York Times, Amazon has confirmed its investment in a massive gas-burning power plant in Texas, meant to supply up to 7.65 gigawatts of ene…

Amazon's New AI Data Center Is So Enormous That It Appears It Will Become the Largest Single Source of Pollution in the United States
Amazon's planned data center for Pecos County, Texas would come with a gas plant capable of emitting 33 million tons of CO2 every year.

Holographic entanglement entropy with conformal boundary conditions
Elena C\'aceres, Hare Krishna, Harita Palani Balaji, Vaishnavi Patil
https://arxiv.org/abs/2608.06277 https://arxiv.org/pdf/2608.06277 https://arxiv.org/html/2608.06277
arXiv:2608.06277v1 Announce Type: new
Abstract: We study holographic entanglement entropy in 3-dimensional AdS gravity with conformal boundary conditions which fix the conformal class of the boundary metric and its extrinsic curvature, $K$, while leaving the Weyl mode dynamical. Extending Lewkowycz-Maldacena-Dong's replica construction, we derive the corresponding holographic entanglement entropy formula. We show that the fluctuating Weyl mode does not contribute additional entropy. The entropy of the full boundary is therefore the Bekenstein-Hawking entropy, and the entropy of a boundary subregion continues to obey the Ryu-Takayanagi prescription, namely, the area of a minimal surface divided by $4G_N$.
We carry out explicit calculations for global AdS, rotating and non-rotating BTZ geometries. For an interval in AdS$_3$ we find that the $K$-dependent holographic entanglement entropy is governed by $c_m=\frac{3 \ell}{2 G_N}.$ For a thermal state at high conformal temperatures we find that, the entropy is governed by $c_{\rm eff}=\frac{3 \ell}{2 G_N} \frac{K \ell- \sqrt{K^2 \ell^2-4}}{2}$, the same effective central charge that governs the Cardy-like density of states, in agreement with previous results in the literature.
Finally, we also compute the entanglement entropy directly from the conjectured dual boundary theory - a holographic CFT coupled with time-like Liouville theory and deformed by a marginal $T \bar{T}$ like operator - and find $S_{EE} =\frac{c_{\rm eff}}{3} \ln\!\left(\frac{2 R \sin\phi_0}{\epsilon}\right) .$ This result for the state with no operator insertions (vacuum state ), provides an independent boundary realization of $c_{\mathrm{eff}}$ while clarifying that this state is not the state dual to global AdS.
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China führt erfolgreiche Tests mit fliegendem Windkraftwerk durch - Innovationen - derStandard.at › Web
https://www.derstandard.at/story/300000033

China führt erfolgreiche Tests mit fliegendem Windkraftwerk durch
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