Abstract: This paper investigates the shortest path planning of unmanned surface vehicles (USV) in complicated marine environments. A novel path planning method called “sunlight algorithm” is first ...

Abstract: In view of the situation that intermittent power sources such as photovoltaic and fan are used as the power supply for recovery of distribution system. Firstly, a criterion for the ...

The shortest day of the year is not something to celebrate, you might think. Something to get through, like a layoff or a cold, in hopes of better — or at least longer — days to come. But the ancients ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. The Northern Hemisphere’s shortest day and longest night of ...

Cold temperatures and wintry weather in Western North Carolina have served as omens of the coming winter. The winter solstice, which is just over a week away, signifies the beginning of the winter ...

SIOUX FALLS, S.D. (KELO) — We are about a week and a half away from winter solstice, which brings the shortest day of the year. You may be shocked to learn, though, that our earliest sunset time does ...

The winter solstice is arriving soon. "The winter solstice is significant across various cultures, signaling the changing of the seasons," according to the Old Farmer's Almanac. After the winter ...