Tootfinder

The assassination of a vile person indicates a failure of all the more just, more humane sorts of systems that should have stopped such a person from ever being in a position of power in the first place. Popehat compares celebrating political violence to celebrating war, and I think he has a point: both war and political violence are an indication of failure.
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A democratic nation actually can overcome deep polarization and division
and punish politicians who undermine democracy.
Just not the United States,
even though our leaders have spent decades beating their chests about the wonders of American democracy.
The Brazilian Supreme Court’s recent conviction of Jair Bolsonaro
on five charges related to his attempt to overturn the 2022 election results there and stay in power
is a great illustration that democrat…

Brazil Stopped Its Trump. It’s Pathetic that We Couldn’t Stop Ours.
Brazil barred Bolsonaro from running again and is sending him to jail. Other countries have done it, too. Why is the United States a unique failure?

Infinitely many solutions to a conformally invariant elliptic equation with Choquard-type nonlinearity
Mona Almutairi, Mathew Gluck
https://arxiv.org/abs/2509.11263 https://

Infinitely many solutions to a conformally invariant elliptic equation with Choquard-type nonlinearity
The existence of an unbounded sequence of solutions to a conformally invariant elliptic equation having nonlocal critical-power nonlinearity is established. The primary obstacle to establishing existence of solutions is the failure of compactness in the Sobolev embedding. To overcome this obstacle, the problem under consideration is lifted to an equivalent problem on the standard sphere so that the symmetries of the sphere can be leveraged. Two classes of symmetries are considered and for each …

Detection and Classification of Internal Leakage in Hydraulic Cylinders
Mehrbod Zarifi, Mohamad Amin Jamshidi, Zolfa Anvari, Hamed Ghafarirad, Mohammad Zareinejad
https://arxiv.org/abs/2508.07436

Detection and Classification of Internal Leakage in Hydraulic Cylinders
Hydraulic systems have been one of the most used technologies in many industries due to their reliance on incompressible fluids that facilitate energy and power transfer. Within such systems, hydraulic cylinders are prime devices that convert hydraulic energy into mechanical energy. Some of the genuine and very common problems related to hydraulic cylinders are leakages. Leakage in hydraulic systems can cause a drop in pressure, general inefficiency, and even complete failure of such systems. T…

InSight-R: A Framework for Risk-informed Human Failure Event Identification and Interface-Induced Risk Assessment Driven by AutoGraph
Xingyu Xiao, Jiejuan Tong, Peng Chen, Jun Sun, Zhe Sui, Jingang Liang, Hongru Zhao, Jun Zhao, Haitao Wang
https://arxiv.org/abs/2507.00066

InSight-R: A Framework for Risk-informed Human Failure Event Identification and Interface-Induced Risk Assessment Driven by AutoGraph
Human reliability remains a critical concern in safety-critical domains such as nuclear power, where operational failures are often linked to human error. While conventional human reliability analysis (HRA) methods have been widely adopted, they rely heavily on expert judgment for identifying human failure events (HFEs) and assigning performance influencing factors (PIFs). This reliance introduces challenges related to reproducibility, subjectivity, and limited integration of interface-level da…

Reliability-Based Fault Analysis and Modeling of Satellite Electrical Power Subsystems Using Fault Tree and Simulation Tools
Niloofar Nobahari, Alireza Rezaee
https://arxiv.org/abs/2507.15708

Reliability-Based Fault Analysis and Modeling of Satellite Electrical Power Subsystems Using Fault Tree and Simulation Tools
One of the most important satellite subsystems is its electric power subsystem. The occurrence of a fault in the satellite power system causes the failure of all or part of the satellite. Calculating the overall reliability of the power system before the mission is crucial in improving the design of the satellite power system. Each component of the power system may malfunction due to pressure, launch pressure, and operating conditions. Accordingly, in this paper, first, a healthy and faulty sys…

Series C, Episode 07 - Children of Auron
SERVALAN: Ah, pilot four zero.
PILOT FOUR-ZERO: Loss of power. Systems failure. Total cutout.
SERVALAN: You were hit by a random ionic reef.
PILOT FOUR-ZERO: Ionic reef?
https://blake.torpidity.net/m/307/37 B7B4

Growth and prediction of plastic strain in metallic glasses
Tero M\"akinen, Anshul D. S. Parmar, Silvia Bonfanti, Mikko Alava
https://arxiv.org/abs/2507.04271

Growth and prediction of plastic strain in metallic glasses
Predicting the failure and plasticity of solids remains a longstanding challenge, with broad implications for materials design and functional reliability. Disordered solids like metallic glasses can fail either abruptly or gradually without clear precursors, and the mechanical response depends strongly on composition, thermal history and deformation protocol -- impeding generalizable modeling. While deep learning methods offer predictive power, they often rely on numerous input parameters, hind…

Hat tip to John Kemp for admitting that he was wrong to blame Spain's blackout on excessive reliance on inverter-based renewables and insufficient inertia, and 👏 for his very decent explainer on what actually happened. https://jkempenergy.com/2025/06/19/spa

Spain’s blackout blamed on poor voltage control
19 June 2025 Spain’s massive blackout was caused by overvoltage on the transmission system and the failure of the country’s generators to compensate by absorbing more reactive power, according to t…

Emergence of Finite-Time Singularities from Accelerated Event Recurrence: Insights into the Mechanism of Catastrophic Failure
Qinghua Lei, Didier Sornette
https://arxiv.org/abs/2507.22368

Emergence of Finite-Time Singularities from Accelerated Event Recurrence: Insights into the Mechanism of Catastrophic Failure
We develop a discrete-event modeling framework that captures the progression of geophysical systems toward catastrophic failure through sequences of distinct damage events. By representing system evolution as a succession of temporally accelerating and amplitude-varying events, the framework reveals how finite-time singularities, both logarithmic and power law types, naturally emerge from the interplay between shrinking interevent intervals and growing event magnitudes. This event-based perspec…

Cardiorespiratory coupling improves cardiac pumping efficiency in heart failure
Josh Border, Andrew Lefevre, Vishal Jain, Alain Nogaret
https://arxiv.org/abs/2507.00597

Cardiorespiratory coupling improves cardiac pumping efficiency in heart failure
Recent trials of a neuronal pacemaker have shown that cardiac pumping efficiency increases when respiratory sinus arrhythmia (RSA) is artificially restored in animal models of heart failure. This novel device sheds new light on the functional role of RSA, which has long been debated, by allowing the strength of cardiorespiratory coupling to be artificially varied. Here we show that RSA minimizes the cardiac power dissipated within the cardiovascular network. The cardiorespiratory system is foun…

DPLib: A Standard Benchmark Library for Distributed Power System Analysis and Optimization
Milad Hasanzadeh, Amin Kargarian
https://arxiv.org/abs/2506.20819

DPLib: A Standard Benchmark Library for Distributed Power System Analysis and Optimization
\textit{DPLib} is an open-source MATLAB-based benchmark library created to support research and development in distributed and decentralized power system analysis and optimization. Distributed and decentralized methods offer scalability, privacy preservation, and resilience to single points of failure, making them increasingly important for modern power systems. However, unlike centralized tools such as MATPOWER, no general-purpose, reproducible data library package currently exists for distrib…

A facility for thermo-mechanical characterization of fusion magnet materials during cryogenic ion irradiation
Akarsh Aurora, Alexis R Devitre, Angus PC Wylie, Jonas A Rajagopal, Michael P Short
https://arxiv.org/abs/2506.17358

A facility for thermo-mechanical characterization of fusion magnet materials during cryogenic ion irradiation
Commercial fusion power plants demand magnet materials that retain structural integrity and thermal conductivity while operating under the bombardment of energetic neutrons at cryogenic temperatures. Understanding how thermo-mechanical properties evolve under such extreme loads is crucial for selecting materials with high radiation tolerance and predictable failure mechanisms. Presented here is a facility that combines cryogenic transient grating spectroscopy (TGS) with simultaneous ion irradia…