Abstract: Traveling salesman problem (TSP) is a combinatorial optimization problem, serving as basis for many real-world applications (e.g., transportation planning, circuit board design, and DNA ...

No matter how often Congress decides to let the government shut down, the outcome is always the same — more debt. It’s not a direct cause and effect. Perhaps I should phrase it this way: The outcome ...

MAINE, USA — The first time Sam Cheeney saw a green crab was in the early 2000s, as part of an ecology class at the University of Maine at Machias. He and his classmates ventured out across the mud ...

An error has occurred. Please try again. With a The Portland Press Herald subscription, you can gift 5 articles each month. It looks like you do not have any active ...

In Milbridge, a former farmer is grinding invasive green crabs into fertilizer. In South Portland, a Cambodian food incubator is incorporating them into seafood dishes. To make his fertilizer, Sam ...

The world wastes 1 billion meals worth of food every single day. That shocking fact from the U.N. Environment Programme puts into stark terms the massive problem of food waste, which produces ...

Sign up for The Morning Report with all your must-read news for the day. The intertwined problems of homelessness, mental illness and drug use are among the San Diego ...

On September 26, 2025, the Federal Motor Carrier Safety Administration (FMCSA) published an emergency interim final rule that significantly narrows the eligibility for non-domiciled Commercial ...

As long as the bird stays on the track. It’s been an eventful couple of weeks for Denny Hamlin. Last week, the driver of the #11 car for Joe Gibbs Racing found himself in a feud with his own teammate ...

As lawmakers in Tallahassee discuss the possibility of abolishing property taxes in the state, a new poll shows that only 33 percent of Florida voters are in support of such a move, while 45 percent ...