Capturing the first image of a supermassive black hole using the Event Horizon Telescope (EHT). This image of the black hole at the center of the nearby galaxy M87 reveals how gravitation affects the ...

Can you chip in? As an independent nonprofit, the Internet Archive is fighting for universal access to quality information. We build and maintain all our own systems, but we don’t charge for access, ...

To help relieve dry skin, dermatologists offer these tips. Dry skin can flake, itch, crack, and even bleed. These tips from board-certified dermatologists can help you heal excessively dry skin at ...

Abstract: In the application of Dempster-Shafer (D-S) evidence theory, the determination of basic probability assignment (BPA) is a key step. How to determine BPA is an open issue. To solve this ...

An illustration of a magnifying glass. An illustration of a magnifying glass.

Abstract: In many cases, we obtain information using various methods in order to make better decisions. The everything in nature and society has its negative, the negation of negation has significant ...