Tootfinder

New reason not to use #PythonPoetry just dropped: they reinvented "reproducible builds", poorly. The problem is, they missed the purpose of reproducible builds entirely and they use it for source distributions too, and when you don't use SOURCE_DATE_EPOCH, they force all files to epoch (as in timestamp 0) instead of leaving them alone.
Like, all source distributions created by Poetry and uploaded to #PyPI now have 1970 timestamps that, simply speaking, break stuff. The most absurd thing is that ZIP can't handle that timestamp, so they override it and use another date for wheels 🤦.
#Gentoo #PEP517

A planning tool for neutron powder diffraction experiments
Joseph A. M. Paddison, Stuart Calder, Danielle R. Yahne, Malcolm J. Cochran, Si Athena Chen, Matthias D. Frontzek, Yuanpeng Zhang
https://arxiv.org/abs/2506.03201

A planning tool for neutron powder diffraction experiments
We introduce a computer program to simulate the results of neutron powder-diffraction experiments at the High Flux Isotope Reactor at Oak Ridge National Laboratory. The program is freely available as a web application at http://addie.ornl.gov/hfirestimate, and is designed to be straightforward to use for researchers who are new to neutron diffraction. The input includes the crystal structure of the proposed sample, the sample mass, and the instrument configuration. The results include a plot of…

H3 in irradiated protoplanetary disks: Linking far-ultraviolet radiation and hot water vapor
Javier R. Goicoechea, Octavio Roncero, Evelyne Roueff, John H. Black, Ilane Schroetter, Olivier Bern\'e
https://arxiv.org/abs/2506.05189

H3+ in irradiated protoplanetary disks: Linking far-ultraviolet radiation and hot water vapor
The likely JWST detection of vibrationally excited H3+ emission in the irradiated disk d203-506, reported by Schroetter et al., raises the question of whether cosmic-ray ionization is enhanced in disks within clustered star-forming regions, or if alternative mechanisms contribute to H3+ formation and excitation. We present a detailed model of the photodissociation region (PDR) component of a protoplanetary disk-comprising the outer disk surface and the photoevaporative wind-exposed to strong ex…

🇺🇦 #NowPlaying on BBCRadio3's #Breakfast
Georg Philipp Telemann, Peter Holtslag, Mark Caudle, Parley of Instruments & Peter Holman:
🎵 Recorder Concerto in F major (4th mvt)
#GeorgPhilippTelemann #PeterHoltslag #MarkCaudle #ParleyofInstruments #PeterHolman

The New York Times reports that President Trump has enlisted the firm Palantir, founded by far-right billionaire Peter Thiel,
to carry out his March executive order
instructing government agencies to share data with each other.
The order has increased fears that the government is putting together a database to wield surveillance powers over the American public.

Trump Taps Palantir to Create Master Database on Every American
Trump’s dystopian plan is already underway.

For #Caturday it's Pedro the #Math Cat 🐈 vs. Hanging flower basket
#Cats #CatsOfMastodon

A Quantum Information Theoretic Approach to Tractable Probabilistic Models
Pedro Zuidberg Dos Martires
https://arxiv.org/abs/2506.01824 https://

A Quantum Information Theoretic Approach to Tractable Probabilistic Models
By recursively nesting sums and products, probabilistic circuits have emerged in recent years as an attractive class of generative models as they enjoy, for instance, polytime marginalization of random variables. In this work we study these machine learning models using the framework of quantum information theory, leading to the introduction of positive unital circuits (PUnCs), which generalize circuit evaluations over positive real-valued probabilities to circuit evaluations over positive semi…

HelioIndex: A Directory of Active Researchers in Solar and Heliospheric Physics
Peter R. Young
https://arxiv.org/abs/2506.00159 https://

HelioIndex: A Directory of Active Researchers in Solar and Heliospheric Physics
HelioIndex is a directory of authors who are active in solar and heliospheric physics (SHP). It is available at the webpage HelioIndex.org, and it includes several derived products such as publication lists, country and institute data, journal data, and lists of the most cited articles in the field. HelioIndex is built from ORCID identifiers and publication data obtained from the Astrophysics Data System and ORCID. Selection criteria have been chosen to approximately correspond to a researcher …

Join Radu Pop and Pietro Mele at Berlin Buzzwords as they discuss building an extensible hybrid search solution with Elasticsearch. They will cover functional modeling, cluster architecture, and practical insights on managing billions of vectors in real-world scenarios. Radu and Pietro will also address hybrid reranking challenges and the limitations of standard fusion techniques, explaining their innovative approach.
Learn more:

The QTF-Backbone: Proposal for a Nationwide Optical Fibre Backbone in Germany for Quantum Technology and Time and Frequency Metrology
Klaus Blaum (Max Planck Institute for Nuclear Physics), Peter Kaufmann (German National Research,Education Network, DFN), Jochen Kronj\"ager (Physikalisch-Technische Bundesanstalt), Stefan K\"uck (Physikalisch-Technische Bundesanstalt), Tara Cubel Liebisch (Physikalisch-Technische Bundesanstalt), Dieter Meschede (University of Bonn), Susanne Na…

The QTF-Backbone: Proposal for a Nationwide Optical Fibre Backbone in Germany for Quantum Technology and Time and Frequency Metrology
The recent breakthroughs in the distribution of quantum information and high-precision time and frequency (T&F) signals over long-haul optical fibre networks have transformative potential for physically secure communications, resilience of Global Navigation Satellite Systems (GNSS) and fundamental physics. However, so far these capabilities remain confined to isolated testbeds, with quantum and T&F signals accessible, for example in Germany, to only a few institutions. We propose the QTF-Back…