Tootfinder

From the comments: up_versus_down Marine Corps sniper here: In a sniper-spotter team, the communication is highly coordinated and silent. While there is no single, universally recognized hand signal for the precise moment of a sniper shot, a series of signals are used leading up to and confirming the engagement. The specific signals can vary by military branch or operational context, but they generally involve the following.

I have a question about the following:
Space-X satellites are relatively low orbit - they go around the world, their radio/signal footprint on the ground goes around the world with them.
So how does a single country, the US, issue "license" for radio spectrum that apply outside of the US geographic borders?
"SpaceX buys wireless spectrum from EchoStar in $17 billion deal"

Leveraging Vision Transformers for Enhanced Classification of Emotions using ECG Signals
Pubudu L. Indrasiri, Bipasha Kashyap, Pubudu N. Pathirana
https://arxiv.org/abs/2510.05826

Leveraging Vision Transformers for Enhanced Classification of Emotions using ECG Signals
Biomedical signals provide insights into various conditions affecting the human body. Beyond diagnostic capabilities, these signals offer a deeper understanding of how specific organs respond to an individual's emotions and feelings. For instance, ECG data can reveal changes in heart rate variability linked to emotional arousal, stress levels, and autonomic nervous system activity. This data offers a window into the physiological basis of our emotional states. Recent advancements in the field d…

«Hayek, whose company is the world’s largest watchmaker, said the CEOs’ visit sent a signal of weakness. Instead, he suggested that Switzerland — the seventh-largest investor in the US — should retaliate by threatening to cut investment, or ditch a deal to buy US-made F-35 jets.
“Are we William Tell,” he quipped in reference to the Swiss hero of folklore, “or are we a vassal?”»

Distributed MPC-based Coordination of Traffic Perimeter and Signal Control: A Lexicographic Optimization Approach
Viet Hoang Pham, Hyo-Sung Ahn
https://arxiv.org/abs/2510.04038 …

Distributed MPC-based Coordination of Traffic Perimeter and Signal Control: A Lexicographic Optimization Approach
This paper introduces a comprehensive strategy that integrates traffic perimeter control with traffic signal control to alleviate congestion in an urban traffic network (UTN). The strategy is formulated as a lexicographic multi-objective optimization problem, starting with the regulation of traffic inflows at boundary junctions to maximize the capacity while ensuring a smooth operation of the UTN. Following this, the signal timings at internal junctions are collaboratively optimized to enhance …

Something you can bring with you the next time you go to a museum.
https://salrandolph.substack.com/p/ways-of-seeing-seasonal-feeling-2

Ways of Seeing: Seasonal Feeling
Autumn is taking hold

Signless Laplacian characterization of cones over disjoint unions of cycles, edges and isolated vertices
Jiachang Ye, Jianguo Qian, Zoran Stanic
https://arxiv.org/abs/2509.25925

Signless Laplacian characterization of cones over disjoint unions of cycles, edges and isolated vertices
Two graphs are said to be $Q$-cospectral if they share the same signless Laplacian spectrum. A simple graph is said to be determined by its signless Laplacian spectrum (abbreviated as DQS) if there exists no other non-isomorphic simple graph with the same signless Laplacian spectrum. In this paper, we establish the following results: (1) Let$G \cong K_{1} \vee \bigl(C_{k} \cup qK_{2} \cup sK_{1}\bigr),$ with $q,s \geq 1$, $k \geq 4$, and at least $21$ vertices. If $k$ is odd, then $G$ is DQS.…

Revealing the Temporally Stable Bimodal Energy Distribution of FRB 20121102A with a Tripled Burst Set from AI Detections
Yidan Wang, Jing Han, Pei Wang, Di Li, Hanting Chen, Yuchuan Tian, Erbil Gugercinoglu, Jianing Tang, Zihan Zhang, Kaichao Wu, Xiaoli Zhang, Yuhao Zhu, Jinhuang Cao, Mingtai Chen, Jiapei Feng, Zhaoyu Huai, Zitao Lin, Jieming Luan, Hongbin Wang, Junjie Zhao, Chaowei Tsai, Weiwei Zhu, Yongkun Zhang, Yi Feng, Aiyuan Yang, Dengke Zhou, Jianhua Fang, Jiaying Xu, Chenhui Ni…

Revealing the Temporally Stable Bimodal Energy Distribution of FRB 20121102A with a Tripled Burst Set from AI Detections
Active repeating Fast Radio Bursts (FRBs), with their large number of bursts, burst energy distribution, and their potential energy evolution, offer critical insights into the FRBs emission mechanisms. Traditional pipelines search for bursts through conducting dedispersion trials and looking for signals above certain fluence thresholds, both of which could result in missing weak and narrow-band bursts. In order to improve the completeness of the burst set, we develop an End-to-end DedispersE-ag…

Handling Data Gaps for the Next Generation of Gravitational-Wave Observatories
Noah Pearson, Neil J. Cornish
https://arxiv.org/abs/2509.05479 https://arxiv…

Handling Data Gaps for the Next Generation of Gravitational-Wave Observatories
In the coming decades, as the low frequency sensitivity of detectors improves, the time that gravitational-wave signals remain in the sensitive band will increase, leading to new challenges in analyzing data, namely non-stationary noise and data gaps. Time-frequency (wavelet) methods can efficiently handle non-stationary noise, but data gaps still lead to spectral leakage due to the finite length of the wavelet filters. It was previously shown that Bayesian data augmentation - "gap filling" - c…