When fluctuations shape biodiversity: A minimalist model explains why 'rarity' is so common

An ecosystem is not a still life. Even where everything looks stable—a woodland, a lake, the soil—the internal "bookkeeping" ...

Beyond 'survival' of fittest: Evolution works in teams

Survival of the fittest. Nature red in tooth and claw. The common view of natural selection is based solely on the individual: A trait allows an organism to out-compete its rivals and is thus passed ...
IEEE

A Multiobjective Evolutionary Algorithm Based on Bipopulation With Uniform Sampling for Neural Architecture Search

Abstract: Neural architecture search (NAS) automates neural network design, improving efficiency over manual approaches. However, efficiently discovering high-performance neural network architectures ...
IEEE

Bilevel Evolutionary Multi-objective Algorithm with Multiple Lower-level Search Modes

Abstract: In bilevel optimization, the upper-level optimization problem (ULOP) requires to be solved under the constraint of the inner lower-level optimization problem (LLOP). However, it is ...
NPR

Nancy Guthrie search enters its second week as a purported deadline looms

The search for Today show co-host Savannah Guthrie's mother is now in its second week. Over the weekend, the Guthrie family said they have received a message from the people who say they took Nancy ...
NBC Los Angeles

FBI investigating ‘new note' regarding disappearance of Nancy Guthrie

The FBI and Pima County Sheriff’s Department this afternoon said it is aware of a new message regarding Nancy Guthrie, the mother of “TODAY” co-anchor Savannah Guthrie. The search has entered its ...
NPR

Investigators examining ransom notes sent during search for Nancy Guthrie

The FBI says it's examining ransom notes sent to the media as the search for Nancy Guthrie, the mother of 'Today' show host Savannah Guthrie, enters its sixth day. The FBI has confirmed the existence ...
News 3 Las Vegas

Savannah Guthrie's mother missing; ransom notes received

Legacy landowners along historic Jackson Avenue laid out their vision for the corridor during a presentation Saturday at the Historic Westside School.The Jackso Third annual Red Car Show draws vintage ...
E!

FBI Make Arrest Over False Ransom Note Amid Search for Savannah Guthrie’s Mom

In the latest update from authorities amid the search for Nancy Guthrie, the Federal Bureau of Investigations confirmed they have arrested someone who was impersonating the 84-year-old’s captor in a ...
Newsweek

Savannah Guthrie Addresses Ransom Note as Search for Mom Continues

Savannah Guthrie and her siblings released a new video statement on Instagram Wednesday night, addressing the reports of a ransom note in the disappearance of their mother, Nancy Guthrie. Nancy ...
AZFamily

Family of missing Nancy Guthrie releases video statement as search intensifies

TUCSON, AZ (AZFamily/CBS News/AP) — The family of missing Nancy Guthrie released Wednesday night a video through social media asking for proof of life as the search for the missing 84-year-old ...