Tootfinder

Protecting ALMA’s skies Whitepaper: a study of the risks posed by radio frequency interference (RFI) to ALMA today and in the near future, from both ground-based and space-based sources of radio emissions. The paper identifies the vulnerable points eof the observatory, and discusses and evaluates potential mitigation measures.
Announcement:

Protecting ALMA's Skies | ALMA
The Atacama Large Millimeter/submillimeter Array (ALMA), renowned for observing the cosmos's darkest and most distant corners, has taken a step to ensure its observations remain unaffected by human-made interference. A recently concluded study, led by senior Radio Frequency (RF) engineer and Spectrum Manager Giorgio Siringo, alongside ALMA Director Sean Dougherty, presents an extensive analysis of...

Jack Clark’s Import AI newsletter is always fun; this one especially because it explores the shared interest Meta and the CCP have in preventing fine-tuning of their models.
In a “Palantír”-level irony, one of the projects to prevent all further learning is called SOPHON. https://

Kenneth #Chesebro got smacked with a ♦️felony fraud charge ♦️by #Wisconsin prosecutors on Tuesday.
Largely considered🔸 the architect of the fake electors plot to flip the 2020 election to Trump, 🔸
Chesebro was charged alongside
Michael

Trump’s “Election Fraud” Henchmen Charged in Yet Another State
Kenneth Chesebro and two other key Donald Trump allies have been charged for their role in trying to overthrow the 2020 election in Wisconsin.

Protecting ALMA’s skies Whitepaper: a study of the risks posed by radio frequency interference (RFI) to ALMA today and in the near future, from both ground-based and space-based sources of radio emissions. The paper identifies the vulnerable points eof the observatory, and discusses and evaluates potential mitigation measures.
Announcement:

Protecting ALMA's Skies | ALMA
The Atacama Large Millimeter/submillimeter Array (ALMA), renowned for observing the cosmos's darkest and most distant corners, has taken a step to ensure its observations remain unaffected by human-made interference. A recently concluded study, led by senior Radio Frequency (RF) engineer and Spectrum Manager Giorgio Siringo, alongside ALMA Director Sean Dougherty, presents an extensive analysis of...

This https://arxiv.org/abs/2208.12377 has been replaced.
link: https://scholar.google.com/scholar?q=a

Rigorous numerical integration of algebraic functions
We present an algorithm which uses Fujiwara's inequality to bound algebraic functions over ellipses of a certain type, allowing us to concretely implement a rigorous Gauss-Legendre integration method for algebraic functions over a line segment. We consider path splitting strategies to improve convergence of the method and show that these yield significant practical and asymptotic benefits. We implemented these methods to compute period matrices of algebraic Riemann surfaces and these are availa…

This https://arxiv.org/abs/2402.06114 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Semi-Symmetric Metric Gravity: from the Friedmann-Schouten geometry with torsion to dynamical dark energy models
In the present paper we introduce a geometric generalization of standard general relativity, based on a geometry initially introduced by Friedmann and Schouten in 1924, through the notion of a semi-symmetric connection. The semi-symmetric connection is a particular connection that extends the Levi-Civita one, by allowing for the presence of torsion. While the mathematical landscape of the semi-symmetric metric connections is well-explored, their physical implications remain to be investigated. …

The near-infrared degree of polarization in debris disks. Toward a self-consistent approach to model scattered light observations
Johan Olofsson, Philippe Th\'ebault, Amelia Bayo, Thomas Henning, Julien Milli
https://arxiv.org/abs/2406.02682

The near-infrared degree of polarization in debris disks. Toward a self-consistent approach to model scattered light observations
Debris disks give us the unique opportunity to probe the properties of small $μ$m-sized particles, allowing us to peer into the constituents of their parent bodies, young analogs of comets and asteroids of our solar system. In the past, studies of the total intensity phase function have proven powerful to constrain the main characteristics of the dust particles in debris disks. Nonetheless, there can remain some degeneracies in the modeling that can be alleviated when considering polarized int…

Superrotations at Spacelike Infinity
Adrien Fiorucci, Javier Matulich, Romain Ruzziconi
https://arxiv.org/abs/2404.02197 https://arxi…

Superrotations at Spacelike Infinity
We propose a consistent set of boundary conditions for gravity in asymptotically flat spacetime at spacelike infinity, which yields an enhancement of the Bondi-Metzner-Sachs group with smooth superrotations and new subleading symmetries. These boundary conditions are obtained by allowing fluctuations of the boundary structure which are responsible for divergences in the symplectic form, and a renormalisation procedure is required to obtain finite canonical generators. The latter are then made i…

This https://arxiv.org/abs/2402.06114 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Semi-Symmetric Metric Gravity: from the Friedmann-Schouten geometry with torsion to dynamical dark energy models
In the present paper we introduce a geometric generalization of standard general relativity, based on a geometry initially introduced by Friedmann and Schouten in 1924, through the notion of a semi-symmetric connection. The semi-symmetric connection is a particular connection that extends the Levi-Civita one, by allowing for the presence of torsion. While the mathematical landscape of the semi-symmetric metric connections is well-explored, their physical implications remain to be investigated. …

Counting bare curves
Tobias Ekholm, Vivek Shende
https://arxiv.org/abs/2406.00890 https://arxiv.org/pdf/2406.00890

Counting bare curves
We construct a class of perturbations of the Cauchy-Riemann equation for maps from curves to a Calabi-Yau threefold, allowing Maslov zero Lagrangian boundary conditions. Our perturbations vanish on components of zero symplectic area. For generic 1-parameter families of perturbations, the locus of solution curves without zero-area components is compact, transversely cut out, and satisfies certain natural coherence properties. In short, we construct an `adequate perturbation scheme' with the need…