Tootfinder

Derek Thompson says he is leaving The Atlantic after almost 17 years to launch a Substack newsletter, focusing on "the abundance agenda", tech, and more (Derek Thompson)
https://derekthompson.substack.com/p/why-im-joining-substack

Why I'm Joining Substack
Introducing my newsletter on ABUNDANCE and the future of science, technology, and social connection

Posets for Specht ideals of essential real reflection groups
Sebastian Debus, Kurt Klement Gottwald
https://arxiv.org/abs/2506.15335 https://

Posets for Specht ideals of essential real reflection groups
Specht ideals are symmetric ideals in the polynomial ring generated by Specht polynomials associated with group representations. These ideals were previously studied for reflection groups of types $A$ and $B$, where their inclusion relations and their varieties reflect rich combinatorial structures. In this paper, we extend this theory to type $D$ and the dihedral groups. Our results complete the combinatorial study of Specht ideals across all infinite families of essential real reflection grou…

Mike Huckabee, the US ambassador to Israel, still earns profits from Substack subscriptions despite ceding editorial control of the Huckabee Post to his son (Dave Levinthal/Columbia Journalism Review)
https://www.cjr.org/news/huckabee-substack

Sources: Substack is pitching investors on a round between $50M and $100M that would value it above its ~$700M last round price, and is generating ~$45M in ARR (Eric Newcomer/Newcomer)
https://www.newcomer.co/p/scoop-substack-in-talks-to-raise

SCOOP: Substack in Talks to Raise Financing as It Taps Into the Zeitgeist of Trump II
Substack is generating about $45 million in annual recurring revenue: sources

Simultaneous Charge Carrier Density Mapping of SiC Epilayers and Substrates with Terahertz Time-Domain Spectroscopy
Joshua Hennig, Jens Klier, Stefan Duran, Kuei-Shen Hsu, Jan Beyer, Christian Roeder, Franziska C. Beyer, Nadine Schueler, Nico Vieweg, Katja Dutzi, Georg von Freymann, Daniel Molter
https://arxiv.org/abs/2506.14945…

Simultaneous Charge Carrier Density Mapping of SiC Epilayers and Substrates with Terahertz Time-Domain Spectroscopy
With the growing demand for efficient power electronics, SiC-based devices are progressively becoming more relevant. In contrast to established methods such as the mercury capacitance-voltage technique, terahertz spectroscopy promises a contactless characterization. In this work, we simultaneously determine the charge carrier density of SiC epilayers and their substrates in a single measurement over a wide range of about 8x10^(15)$ cm^(-3) to 4x10^(18) cm^(-3) using time-domain spectroscopy in …

Krugman:
❝What we’re looking at now isn’t the worst job market college graduates have ever seen. It is, however, the worst such market compared with workers in general that we’ve ever seen, by a large margin.
…
We have low overall unemployment, only slightly above historic lows, but unemployment among college graduates between 22 and 27 at recession-like levels.
This has never happened before.❞
https://paulkrugman.substack.com/p/bad-times-for-college-graduates

"And once in a great while, someone will light a lantern—or even two—that will shine forth for democratic principles that are under siege, and set the world ablaze."
This is one Heather Cox Richardson's better than the normally great essays.
#History
https://heathercoxrichardson.substack.com/p/april-18-2025

The UK is Decriminalizing Abortion. Why Can't We?
https://jessica.substack.com/p/the-uk-is-decriminalizing-abortion

Miniaturized Chaos-assisted Spectrometer
Yujia Zhang, Chaojun Xu, Zhenyu Zhao, Yikai Su, Xuhan Guo
https://arxiv.org/abs/2506.15186 https://

Miniaturized Chaos-assisted Spectrometer
Computational spectrometers are at the forefront of spectroscopy, promising portable, on-chip, or in-situ spectrum analysis through the integration of advanced computational techniques into optical systems. However, existing computational spectrometer systems have yet to fully exploit optical properties due to imperfect spectral responses, resulting in increased system complexity and compromised performance in resolution, bandwidth, and footprint. In this study, we introduce optical chaos into …

Sources: Substack is pitching investors on a round between $50M and $100M that would value it above its ~$700M last round price, and is generating ~$45M in ARR (Eric Newcomer/Newcomer)
https://www.newcomer.co/p/scoop-substack-in-talks-to-raise

SCOOP: Substack in Talks to Raise Financing as It Taps Into the Zeitgeist of Trump II
Substack is generating about $45 million in annual recurring revenue: sources