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Microscopic origin of polytype-dependent melting in SiC revealed by machine-learning molecular dynamics
arXiv:2606.00403v1 Announce Type: cross Abstract: Predicting how crystal structure influences high-temperature stability remains a key challenge in materials modelling and design. Silicon carbide (SiC), one of the most thermally and chemically stable materials known, provides an ideal system for studying this problem because its many polytypes preserve similar local tetrahedral bonding while differing in long-range stacking geometry. Here, we combine phase-coexistence machine-learning...
Confocal Subsurface Backscattering Microscopy for Optical Identification of Nanoscale Threading Dislocations in SiC Substrates
arXiv:2606.04607v1 Announce Type: new Abstract: High density threading dislocations in SiC wafers facilitate reverse leakage and degradation, yet commercial defect inspection systems based on surface profiling and PL dark-contrast miss nanoscale TDs because they lack resolvable surface signatures and band-edge PL is uniformly quenched by background dopants or compensating defects. Here, we develop confocal subsurface backscattering microscopy to nondestructively detect TDs, based on the...
Multiscale Decomposition Reveals Predictable Interannual Variability and Climate Trends in Antarctic Sea Ice Loss
Announce Type: replace Abstract: Antarctic sea ice has undergone unprecedented changes in recent years, raising questions about how this key geophysical system is responding to climate change. Decades of slow expansion were replaced by a precipitous decline in 2014-2017, a subsequent apparent recovery, and a renewed collapse from 2022 to the present. We diagnosed sea ice concentration (SIC) from satellite observations with a hierarchical decomposition method based on Dynamic Mode...
Calibration of Structured Ignorance Certificates for Diagnosing Unknown Unknowns in Reasoning Models
Announce Type: new Abstract: Large language models frequently fail in a characteristic way: rather than acknowledging ignorance, they produce fluent but incorrect answers to questions that lie beyond their knowledge boundaries. We introduce \textbf{Structured Ignorance Certificates} (SICs), a JSON-formatted output schema that demands a model explicitly name the missing domain intersection, enumerate required concepts, and propose a productive retrieval query rather than hallucinating an...
Jim Nantz delivers emotional tribute after CBS Sports assistant dies following crash at Memorial Tournament
The CBS Sports team suffered a tragedy this week with the death of production assistant Bryce Adair, following a car crash while working at the PGA Tour's Memorial Tournament in Ohio. Jim Nantz, the legendary lead broadcaster for the network, delivered quite the tribute during the telecast. According to a GoFundMe page set up for Adair, the 31-year-old was involved in a "horrific [sic] single car accident" on Wednesday night before dying on Saturday.
Digital and Technologies Sector Statistics: Volume 1 - Definitions
Digital and Technologies Sector Statistics: Volume 1 - Definitions Information around the definitions included in this release and how they have been constructed Documents Details This page contains details of the updated Digital and Technologies sector definition used in this release as well as an additional Standard Industrial Classification (SIC) code based definition that can be used if the preferred definition is not applicable.
The back-channel bid to go soft on Maduro
When Marco Rubio was named secretary of State, many in both South Florida Republican circles and the American energy industry exulted. But one man who bridged both worlds knew he had a problem. A longtime investor in Venezuela, the main source of crude oil needed to produce the asphalt that had made his family rich, Harry Sargeant III kept relations with top officials in Caracas even as they seized most foreign oil holdings.
'Peddi' BO day 3: Ram Charan film sees 7.2 percent growth
Amid ongoing discussions and controversies surrounding the film, Ram Charan and Janhvi Kapoor starrer 'Peddi' continues to perform strongly at the box office. The film has maintained momentum during its opening weekend. Peddi crosses major box office milestone According to trade figures shared by Sacnilk, 'Peddi' crossed the Rs 100 crore India net mark within just three days of release.
Did Janhvi Kapoor oppose to her camera angles in Peddi? Co-actor Ram Charan clarifies
The controversy surrounding 'Peddi' has taken a fresh turn after fan clubs of Janhvi Kapoor shared screenshots of what they claim are private conversations between the actor and fans. The alleged chats, which surfaced on the internet shortly after director Buchi Babu Sana issued an apology over criticism of the film's portrayal of women, suggest that Janhvi may have expressed concerns about certain scenes during the production stage itself. For those not in the know, 'Peddi' faced severe...
General strike: CGTP hails strong turnout, government says country 'operating normally'
During the night shift, there was an almost total walkout in several National Health Service hospital units. Many schools are closed and flights have been cancelled. The government has already responded to Wednesday’s general strike, downplaying its overall impact.