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Arctic river deltas face rising climate pressure while holding vast frozen carbon reserves
Arctic river deltas face rising climate pressure while holding vast frozen carbon reserves Gaby Clark Scientific Editor Robert Egan Associate Editor Many rivers flow into the Arctic Ocean north of the Arctic Circle—including the Lena in Siberia and the Mackenzie River in Canada. The deltas of these large and small rivers store large amounts of carbon, which is bound there in frozen soils and sediments.
'Bring 'em on': Delta wants United's crown over the Pacific, too
RIO DE JANEIRO — Delta Air Lines is the nation's most profitable carrier, but its hungry rival, United Airlines, is far bigger over the Pacific. Delta's new president, Peter Carter, says that just won't stand. "We want to become stronger, better, faster in the trans-Pacific, and we want to become the leading U.S. carrier" across the Pacific, Carter told CNBC in an interview here during the International Air Transport Association's annual meeting.
Constructions of Quantum $(r,\delta)$-LRCs from cyclic codes
Announce Type: new Abstract: Classical $(r,\delta)$ locally recoverable codes (LRCs) play a central role in distributed data storage systems as they enable an efficient recovery from erasures by accessing a small number of surviving symbols. Motivated by their prospective use in future quantum data storage and by recent theoretical progress on quantum locally recoverable codes (qLRCs), we investigate the construction of qLRCs from classical cyclic $(r,\delta)$-LRCs. Our approach identifies...
Extreme Points of the $(0,\delta)$-LDP Polytope with Small Input Size and Arbitrary Output Sizes
Announce Type: new Abstract: The structure of locally differentially private (LDP) mechanisms can be understood through the geometry of the corresponding privacy polytope. While the extreme points of the \( (\epsilon,0)\)-LDP polytope are well characterized (Kairouz \emph{et al.}, 2014; Holohan \emph{et al.}, 2017; Pensia \emph{et al.}, 2017), comparatively little is known for the \((\epsilon,\delta)\)-LDP polytope with \(\delta>0\). Recent work (Elangovan and Jog, 2024) has shown that even...
From "Weak" Signals to Strong Models: Preference Delta Aggregation with LoRA Merging
arXiv:2606.00357v2 Announce Type: replace Abstract: Training strong large language models (LLMs) requires high-quality supervision, which is often scarce. Recent work shows that paired preference data from weak-weaker model pairs (e.g., Qwen3 4B over 1.7B), despite the limited quality of individual responses, can provide an effective supervision signal through relative quality deltas, which we term a "weak" signal. This motivates a key research question: can multiple "weak" signals be...
Delta plane diverted after passenger accused of slapping flight attendant’s bottom in beverage dispute
Delta plane diverted after passenger accused of slapping flight attendant’s bottom in beverage dispute Exclusive: After skipping over a sleeping passenger while serving drinks, the crewmember ‘felt a slap to her buttocks area with sufficient force to cause her body to move forward,’ according to court records reviewed by The Independent - Bookmark An Indianapolis man is facing felony assault charges for allegedly smacking a flight attendant’s rear end after she inadvertently skipped his...
DDOR: Delta Debugging for Explainable Overrefusal Testing and Repair
Announce Type: new Abstract: While safety alignment and guardrails help large language models (LLMs) avoid harmful outputs, they can also induce overrefusal, i.e., unwarranted rejection of benign queries that merely appear risky. We present DDOR (Delta Debugging for OverRefusal), a fully automated and explainable framework for overrefusal testing and repair in a black-box setting, where only model inputs and outputs are accessible and internal safety mechanisms remain opaque. DDOR applies...
Delta resumes direct Hong Kong-US flights despite higher fuel costs
United States carrier Delta Air Lines has resumed direct flights to the city after the pandemic, launching a daily Hong Kong-Los Angeles service amid surging fuel prices. Jeff Moomaw, the airline’s vice-president for Asia-Pacific, said on Monday that it would take some time to increase services connecting the city to more destinations as the carrier remained focused on current demand. “Our focus right now is making sure that this flight is a success,” Moomaw said.
How Delta Steered Around Airline Industry Chaos
Delta Air Lines doesn’t plan any drastic changes, said Ed Bastian, who has completed a decade as chief executive.
Q-Delta: Beyond Key-Value Associative State Evolution
Announce Type: new Abstract: Linear attention reformulates sequence modeling as recurrent state evolution, enabling efficient linear-time inference. Under the key-value associative paradigm, existing approaches restrict the role of the query to the readout operation, decoupling it from state evolution. We show that query-conditioned state readout induces a structured value prediction over accumulated memory that complements key-based retrieval.