Tootfinder

Substack raised $100M from the Chernin Group, a16z, and others, sources say at a $1.1B valuation, as it builds a social network and focuses on advertising (New York Times)
https://www.nytimes.com/2025/07/17/business/substack-fundraising-social-network.htm…

Substack Raises $100 Million, Betting on Subscriptions but Coming Around to Ads
Substack, originally a newsletter service, says its app now has millions of users interacting with its creators.

Substack raised $100M from the Chernin Group, a16z, and others, sources say at a $1.1B valuation, as it builds a social network and focuses on advertising (New York Times)
https://www.nytimes.com/2025/07/17/business/substack-fundraising-social-network.htm…

Substack Raises $100 Million, Betting on Subscriptions but Coming Around to Ads
Substack, originally a newsletter service, says its app now has millions of users interacting with its creators.

„Würde das Alltägliche so viel Aufmerksamkeit bekommen wie das Spektakel, wären wir an einem anderen Punkt. Wie hat Walter Benjamin gesagt? Dass es so weitergeht, ist die Katastrophe.“ - Lukas Hermsmeier in der aktuellen @… zur Debatte über politische Gewalt nach dem Mord an Charlie Kirk

@… https://robynhitchcock.substack.com/

Robyn Hitchcock | Substack
Surrealist rock ‘n’ roller, troubadour, guitarist, poet, painter, and performer. 1967: How I Got There And Why I Never Left is out now on Little, Brown (UK) and Akashic Books (USA)

On connected graphs with finite spectral redundancy index and Pythagorean triplets
Pawan Kumar, S. Pirzada, S. Merajuddin
https://arxiv.org/abs/2507.11555 …

On connected graphs with finite spectral redundancy index and Pythagorean triplets
This article investigates spectral redundancy, a concept initially introduced by Alberto Seeger. Spectral redundancy arises when different connected induced subgraphs of a graph share the same spectral radius in their adjacency spectrum. Let \(b(G)\) denote the total number of non-isomorphic induced subgraphs of \(G\), and \(c(G)\) represents the cardinality of the set of spectral radius of all connected induced subgraphs of \(G\). The spectral redundancy of a graph \( G \) is defined as the ra…

from my link log —
How Britain built some of the world’s safest roads.
https://ourworldindata.org/britain-safest-roads-history
saved 2025-09-08 …

How Britain built some of the world’s safest roads
The death rate per mile driven has declined 22-fold since 1950.

Self-Adaptive and Robust Federated Spectrum Sensing without Benign Majority for Cellular Networks
Ngoc Duy Pham, Thusitha Dayaratne, Viet Vo, Shangqi Lai, Sharif Abuadbba, Hajime Suzuki, Xingliang Yuan, Carsten Rudolph
https://arxiv.org/abs/2507.12127

Self-Adaptive and Robust Federated Spectrum Sensing without Benign Majority for Cellular Networks
Advancements in wireless and mobile technologies, including 5G advanced and the envisioned 6G, are driving exponential growth in wireless devices. However, this rapid expansion exacerbates spectrum scarcity, posing a critical challenge. Dynamic spectrum allocation (DSA)--which relies on sensing and dynamically sharing spectrum--has emerged as an essential solution to address this issue. While machine learning (ML) models hold significant potential for improving spectrum sensing, their adoption …

Vivani Medical announces record date for spin-off of #Cortigent neuromodulation subsidiary to shareholders https://www.

Vivani Medical Announces Record Date for Spin-off of Cortigent Neuromodulation Subsidiary to Shareholders
Cortigent is a leading developer of brain implant devices based on precision neurostimulation technology. It is the only company to have obtained FDA...

Location sharing apps like Find My, Snap Map, and Life360 remain popular among Gen Z users, despite concerns about their impact on real-world relationships (Summer Maxwell/SFGATE)
https://www.sfgate.com/tech/article/gen-z-spying-on-each-other-20764888.php…

Anthropic enables Claude Opus 4 and 4.1 to end conversations in "cases of persistently harmful or abusive user interactions"; users can still start new chats (Anthropic)
https://www.anthropic.com/research/end-subset-conversations