Tootfinder

One-DoF Robotic Design of Overconstrained Limbs with Energy-Efficient, Self-Collision-Free Motion
Yuping Gu, Bangchao Huang, Haoran Sun, Ronghan Xu, Jiayi Yin, Wei Zhang, Fang Wan, Jia Pan, Chaoyang Song
https://arxiv.org/abs/2509.22002

One-DoF Robotic Design of Overconstrained Limbs with Energy-Efficient, Self-Collision-Free Motion
While it is expected to build robotic limbs with multiple degrees of freedom (DoF) inspired by nature, a single DoF design remains fundamental, providing benefits that include, but are not limited to, simplicity, robustness, cost-effectiveness, and efficiency. Mechanisms, especially those with multiple links and revolute joints connected in closed loops, play an enabling factor in introducing motion diversity for 1-DoF systems, which are usually constrained by self-collision during a full-cycle…

On primitivity and reduction for half-flag-transitive block designs
Xiaoqin Zhan
https://arxiv.org/abs/2509.21781 https://arxiv.org/pdf/2509.21781

On primitivity and reduction for half-flag-transitive block designs
Let $\mathcal{D} = (\mathcal{P}, \mathcal{B})$ be a $2$-$(v, k, λ)$ design, and let $G$ be a half-flag-transitive automorphism group of ${\cal D}$. In this article, we first establish three sufficient conditions for $G$ to be point-primitive: (i) $λ\geq (r, 2λ)^2$, (ii) $r > 4λ(k-2)$, (iii) $(v-1,2k-2)\le2$. Next, we prove that for $λ\geq (r, 2λ)^2$, the group $G$ is either of affine type, almost simple type, or product type. Finally, we analyze the case where $G$ is of almost simple type…

Picked up the Home Assistant addon project again. Notes:
- Home Assistant was evidently designed by a committee of crackheads.
- Nothing works like it logically should: not the UI, not the backend.
- Physical directories do not correspond to paths in the application: /www/community/something/somefile.js is called /hacsfiles/something/somefile.js when you're adding it as a resource.
- I fucking hate json.
- AAAAAAAAAAAAA
- stab stab stab
- deep breath <…

Optimal Stopping for Sequential Bayesian Experimental Design
Chen Cheng, Xun Huan
https://arxiv.org/abs/2509.21734 https://arxiv.org/pdf/2509.21734

Optimal Stopping for Sequential Bayesian Experimental Design
In sequential Bayesian experimental design, the number of experiments is usually fixed in advance. In practice, however, campaigns may terminate early, raising the fundamental question: when should one stop? Threshold-based rules are simple to implement but inherently myopic, as they trigger termination based on a fixed criterion while ignoring the expected future information gain that additional experiments might provide. We develop a principled Bayesian framework for optimal stopping in seque…

Moody Urbanity - Literally 📄
情绪化城市 - 字面上 📄
📷 Pentax MX
🎞️ Ilford HP5 Plus 400，expired 1993
#filmphotography #Photography #blackandwhite

Sources: Snowflake is in talks to buy app monitoring startup Observe for around $1B; Observe has raised more than $470M (The Information)
https://www.theinformation.com/articles/snowflake-talks-buy-app-monitoring-startup-observe…

Snowflake in Talks to Buy App Monitoring Startup Observe Inc. For Around $1 Billion
Snowflake is in talks to buy app monitoring startup Observe Inc. for around $1 billion, which would likely be the biggest deal in Snowflake’s history, according to people with knowledge of the discussions. Observe, based in San Mateo, Calif., sells so-called observability tools that help ...

I understand the need to censor Nazi symbols in the media, but OTOH, this is now just a picture of some random dude’s ankle. 🤦🏻‍♂️
(From https://www.abc.net.au/news/2025-12-27/police-investigate-tattooed-man-at-newcastle-beach/106180310

We think the industry turned away from design, but most people have simply never seen design done before, so they don't believe it's possible.
We need to show them, and we can't sit around waiting for permission.
If we want to prove that design isn't just decoration, we need to stop doing decorative work. Think backwards from valuable goals, and direct your energy down the path that leads you towards that value, rather than "just words" or "just pic…

Hybrid Diffusion for Simultaneous Symbolic and Continuous Planning
Sigmund Hennum H{\o}eg, Aksel Vaaler, Chaoqi Liu, Olav Egeland, Yilun Du
https://arxiv.org/abs/2509.21983 http…

Hybrid Diffusion for Simultaneous Symbolic and Continuous Planning
Constructing robots to accomplish long-horizon tasks is a long-standing challenge within artificial intelligence. Approaches using generative methods, particularly Diffusion Models, have gained attention due to their ability to model continuous robotic trajectories for planning and control. However, we show that these models struggle with long-horizon tasks that involve complex decision-making and, in general, are prone to confusing different modes of behavior, leading to failure. To remedy thi…

Bayesian approach to the PC component
Jie Yao, Kai Zhang, Eric Rose, Edward Valachovic
https://arxiv.org/abs/2509.22217 https://arxiv.org/pdf/2509.22217

Bayesian approach to the PC component
Time series with multiple periodically correlated components is a complex problem with comparatively limited prior research. Most existing time series models are designed to accommodate simple periodically correlated components and tend to be sensitive to over-parameterization and optimization issues and are also unable to model complex PC components patterns in a time series. Frequency separation techniques can be used to maintain the correlation structure of each specific PC component, wherea…