What are the most pressing global crises in 2026? Each year, the International Rescue Committee’s (IRC) Emergency Watchlist identifies the countries at greatest risk of new or worsening humanitarian ...

ABSTRACT: Darcy’s law is the fundamental equation describing the flow of a fluid through a porous medium. Combined with the principle of mass conservation, it leads to the diffusion Equation (e.g., ...

The editorial board is a group of opinion journalists whose views are informed by expertise, research, debate and certain longstanding values. It is separate from the newsroom. Thirteen years ago, no ...

Abstract: In this article, a collision-free elliptical target encircling coordination with an improved convergence is constructed for a colony of unmanned aerial vehicles (UAVs). First, an enhanced ...

Abstract: The intensity gradient of light represents the most important property for optical tweezers to manipulate small particles, which is known to produce a conservative optical force that is ...

SOLE Fitness releases a new guide comparing treadmills and ellipticals in terms of their suitability for individuals with joint problems seeking low-impact cardiovascular exercise. The release comes ...