Orbital Networks
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Orbital Networks in the Three-Body Problem
Announce Type: cross Abstract: Orbital transfers in multi-body systems are often studied as isolated trajectory design problems, making it difficult to identify the larger transport structure connecting families of periodic orbits, including which families act as hubs, gateways, relays, or persistently difficult-to-access regions. This work introduces a reachable-set-based framework for constructing orbital networks in the circular restricted three-body problem. Finite-$\Delta V$ and...
Implicit Bias and Invariance: How Hopfield Networks Efficiently Learn Graph Orbits
arXiv:2512.14338v3 Announce Type: replace Abstract: Many learning problems involve symmetries, and while invariance can be built into neural architectures, it can also emerge implicitly when training on group-structured data. We study this phenomenon in classical Hopfield networks and show they can infer the full isomorphism class of a graph from a small random sample. Our results reveal that: (i) graph isomorphism classes can be represented within a three-dimensional invariant subspace,...
RLEASE: Reinforcement Learning Efficient Active Space Engine
arXiv:2606.07879v1 Announce Type: new Abstract: Selecting the active space for multireference electronic-structure calculations is a long-standing bottleneck that often requires expert chemical intuition and costly trial-and-error. We introduce RLEASE (Reinforcement Learning Efficient Active Space Engine), a low-cost method for automatic, geometry-dependent active-space selection. A neural network predicts per-orbital diagnostic scores ($\hat{s}_{1}$) from inexpensive Hartree-Fock orbital...
Trump flips script on left, maneuvers to use foreign influence law against the them
President Donald Trump is turning foreign-influence laws that once ensnared figures in his own orbit toward left-wing activist networks accused of benefiting from overseas money and support. Once seldom enforced criminally, FARA and related foreign-agent laws became a more prominent DOJ enforcement tool after 2016, including in cases involving several figures in Trump’s orbit, as well as the Biden administration. Now, legal experts say that FARA and other laws dealing with foreign influence...
Trump flips script on left, maneuvers to use foreign influence law against the them
President Donald Trump is turning foreign-influence laws that once ensnared figures in his own orbit toward left-wing activist networks accused of benefiting from overseas money and support. Once seldom enforced criminally, FARA and related foreign-agent laws became a more prominent DOJ enforcement tool after 2016, including in cases involving several figures in Trump’s orbit, as well as the Biden administration. Now, legal experts say that FARA and other laws dealing with foreign influence...
Dynamic FDD for Spectrum Sharing in Non-Terrestrial Networks
arXiv:2606.04849v1 Announce Type: new Abstract: Future 6G networks are envisioned to integrate low Earth orbit satellite mega-constellations to enable seamless global connectivity, particularly in underserved and remote areas. However, the deployment of dense mega-constellations introduces interference among satellites operating over shared frequency bands. This represents a rather new setup for studying spectrum sharing, which exacerbates the limited flexibility of conventional FDD systems...
FCC lifts looming deadline for Amazon Leo satellite broadband constellation
The Federal Communications Commission has waived a requirement for Amazon to launch half of its satellite broadband constellation by the end of July, a key regulatory reprieve that buys the tech giant time to get more of its spacecraft into orbit. Amazon won regulatory approval for the Amazon Leo network in July 2020. The FCC's authorization came with two deadlines.
FCC lifts looming deadline for Amazon Leo satellite broadband constellation
The Federal Communications Commission has waived a requirement for Amazon to launch half of its satellite broadband constellation by the end of July, a key regulatory reprieve that buys the tech giant time to get more of its spacecraft into orbit. Amazon won regulatory approval for the Amazon Leo network in July 2020. The FCC's authorization came with two deadlines.
US Space Force confirms SpaceX will build sensor-to-shooter targeting network
SpaceX has won a lucrative contract to provide the US military with a means of distributing space-based sensing and targeting data, forming the "backbone" of a rearchitected network after separate Pentagon initiatives stalled, officials announced Tuesday. Space Systems Command, the Space Force's primary procurement and acquisition center, announced the $2.29 billion firm-fixed-price agreement, confirming long-simmering reports that the Pentagon was likely to tap SpaceX for a new...