Tootfinder

Sources: smart ring maker Oura is raising an $875M Series E at a $10.9B valuation, up from $5B in November 2024, and has sold ~3M rings over the past year (Bloomberg)
https://www.bloomberg.com/news/articles/2025-09-22/oura-ri…

Oura Ring Maker to Become $11 Billion Company with Latest Raise
Oura Health Oy, the maker of the popular Oura health and fitness ring, is closing in on a roughly $11 billion valuation after selling about 3 million rings over the past year.

Oura, the smart wearable ring I've been wearing for several years, entered into a business agreement with Palantir.
https://techcrunch.com/2025/09/09/smart-ring-maker-ouras-ceo-addresses-recent-backlash-says-fut…

Smart ring maker Oura's CEO addresses recent backlash, says future is a 'cloud of wearables' | TechCrunch
Oura CEO Tom Hale is trying to set the record straight about the smart ring maker's partnership with the Department of Defense (DoD) and data miner Palantir, which is used by defense, intelligence, and law enforcement agencies in the United States and elsewhere.

🥱 Exploring the Alignment of Perceived and Measured Sleep Quality with Working Memory using Consumer Wearables
#sleep

Exploring the Alignment of Perceived and Measured Sleep Quality with Working Memory using Consumer Wearables
Wearable devices offer detailed sleep-tracking data. However, whether this information enhances our understanding of sleep or simply quantifies already-known patterns remains unclear. This work explores the relationship between subjective sleep self-assessments and sensor data from an Oura ring over 4--8 weeks in-the-wild. 29 participants rated their sleep quality daily compared to the previous night and completed a working memory task. Our findings reveal that differences in REM sleep, nocturn…

Some calculations of centralizer rings of a complex reflection group
Masashi Kosuda, Manabu Oura, Sarbaini
https://arxiv.org/abs/2507.20521 https://arxiv.…

Some calculations of centralizer rings of a complex reflection group
Let H1 be the complex reflection group of order 96. For the tensor products of faithful transitive permutation representations of H1, we determine the structures of the centralizer rings. This complements the work of Imamura-Kosuda-Oura.

Probability-Raising Causality for Uncertain Parametric Markov Decision Processes with PAC Guarantees
Ryohei Oura, yuji Ito
https://arxiv.org/abs/2507.07319

Probability-Raising Causality for Uncertain Parametric Markov Decision Processes with PAC Guarantees
Recent decision-making systems are increasingly complicated, making it crucial to verify and understand their behavior for a given specification. A promising approach is to comprehensively explain undesired behavior in the systems modeled by Markov decision processes (MDPs) through formal verification and causal reasoning. However, the reliable explanation using model-based probabilistic causal analysis has not been explored when the MDP's transition probabilities are uncertain. This paper prop…

The Quantified Body: Identity, Empowerment, and Control in Smart Wearables
Maijunxian Wang
https://arxiv.org/abs/2506.15991 https://a…

The Quantified Body: Identity, Empowerment, and Control in Smart Wearables
In an era where bodies are increasingly rendered as streams of biometric data, smart wearables have emerged not only as tools of self-optimization but as infrastructures of predictive governance. This paper critically examines how devices such as the Apple Watch, Fitbit, and Oura Ring reconfigure bodily autonomy through feedback-driven self-surveillance, while embedding users within opaque systems of data extraction and algorithmic control. Drawing on Deleuze's concept of the control society, Z…