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Switched Event-Triggered Adaptive Control of Reaction-Diffusion PDE-ODE with Neural Operator Implementation
arXiv:2606.02114v1 Announce Type: cross Abstract: This paper develops a switched event-triggered adaptive boundary control for a class of reaction-diffusion PDE-ODE cascade systems, where the system and input matrices in the ODE as well as the spatially-varying reaction coefficient in the PDE are uncertain. A two-step backstepping transformation is constructed to derive the continuous-time control law. Then a novel dynamic event-triggered control strategy for the PDE-ODE cascade is proposed...
Warming unlocks ancient carbon in Tibetan permafrost, triggering climate tipping point
Warming unlocks ancient carbon in Tibetan permafrost, triggering climate tipping point Tejasri Gururaj Author Stephanie Baum Scientific Editor Robert Egan Associate Editor A new study in Nature Communications finds a critical climate tipping point in Tibetan permafrost ecosystems. Warming of 2–4 degrees Celsius triggers a self-reinforcing cycle of carbon release that could significantly accelerate climate change, according to the work. Permafrost covers roughly 15% of the Northern...
Ocean collapse triggered ancient wildfires, research suggests
Ocean collapse triggered ancient wildfires, research suggests Gaby Clark Scientific Editor Robert Egan Associate Editor Research led by the University of Alabama found that widespread wildfires during one of Earth's ancient environmental crises did not trigger an ocean collapse but were a consequence of it. The study, published in Science Advances in April, revisits the Late Devonian period, when large parts of the coastal ocean became oxygen-depleted, disrupting marine ecosystems on a...
Google Cloud outage in India after third-party data centre fire triggers shutdown
Google Cloud outage in India after third-party data centre fire triggers shutdown June 9 : Alphabet's Google Cloud said on Tuesday that some customers in India experienced intermittent network disruptions after a fire at a third-party data centre triggered an emergency shutdown of networking equipment. The cloud-computing unit said the fire led to an emergency power shutdown at the facility, isolating a local point of presence in Delhi and reducing network capacity across the metropolitan...
Intermittent fasting triggers surprising changes in the brain
Intermittent fasting triggers surprising changes in the brain An intermittent fasting-style diet helped obese adults lose weight while triggering coordinated changes in both their gut bacteria and brain activity. - Date: - May 31, 2026 - Source: - Frontiers - Summary: - Losing weight may involve rewiring the gut and the brain at the same time. In a study of obese adults, an intermittent fasting-style diet led to significant weight loss, healthier metabolic markers, and notable shifts in gut...
Major quake off Philippines kills one, triggers tsunami warnings
live Asia Major quake off Philippines kills one, triggers tsunami warnings The offshore quake hit at a depth of 35km about 24km west of Mindanao island's Sarangani province. SINGAPORE: A powerful 7.8-magnitude earthquake struck off the southern Philippines on Monday (Jun 8), killing at least one person, injuring four others and triggering tsunami warnings across the region. Buildings collapsed in parts of Mindanao as authorities launched rescue operations.
Iran FM warns any attack on Beirut will trigger 'full-scale resumption of war'
Iran FM warns any attack on Beirut will trigger 'full-scale resumption of war' TEHRAN: Iranian Foreign Minister Abbas Araghchi warned on Wednesday (Jun 3) that any attack on Beirut would trigger a "full-scale resumption" of the Middle East war, as Israel pressed its campaign against Lebanese militant group Hezbollah. Iran has repeatedly insisted that any deal to end the wider Middle East war - which its ally Hezbollah joined on Mar 2 - must also halt the fighting in Lebanon.
Backdoor Unlearning Generalization: A Path Toward the Removal of Unknown Triggers in LLMs
Announce Type: new Abstract: Backdoor attacks in Large Language Models (LLMs) are a growing security concern, where models can generate adversary-chosen content. Existing defenses target backdoors one at a time and typically require knowledge of the trigger, leaving the defender at a structural disadvantage when unknown backdoors may exist in a model. We show that backdoor neutralization through unlearning generalizes across backdoors: training a model to ignore a single trigger can also...
GREAT: Generalizable Backdoor Attacks in RLHF via Emotion-Aware Trigger Synthesis
Announce Type: replace Abstract: Recent work has shown that RLHF is highly susceptible to backdoor attacks. However, existing methods often rely on rare tokens or fixed triggers, limiting their impact in realistic scenarios.
Triggering physical plasmoids in forming current sheets: conditions and diagnostics
arXiv:2604.02065v2 Announce Type: replace Abstract: We investigate the conditions for triggering the plasmoid instability in a dynamically forming current sheet in the resistive magnetohydrodynamic framework, using a pseudo-spectral code applied to the Orszag-Tang vortex at Lundquist number $S \sim 10^5$. Following Garc\'ia Morillo \& Alexakis (2025), we use the power spectrum of the current density $E_J(k)$, complemented by the vorticity spectrum $E_\omega(k)$, to assess the convergence of...