Abstract: Divergence-conforming hierarchical vector bases for the pyramid consist of face- and volume-based functions obtained by a simple procedure that uses a new paradigm recently introduced by ...

The timing could not be more consequential as America sharpens its space posture while a mysterious interstellar visitor approaches our planet. [Photo credit: U.S. Space Force] What we know today sets ...

Convex analysis plays a fundamental role in mathematics. In this paper, we extend the concept of convexity to vector-valued functions in Banach lattices. We introduce the notion of “order convexity” ...

Space vector modulation (SVM) is a sophisticated digital control technique that improves three-phase inverter performance over traditional sinusoidal PWM (SPWM). SVM’s higher DC bus utilization ...

When Yuk Chi Chan set out to build Charter Space in late 2021, it was after a long stretch of pain. As a mission manager at a satellite bus startup, he coordinated the company’s first demonstration ...

Section 1. Purpose. In 1969, the United States landed the first humans on the Moon. In the years since, premier space companies from around the world have been drawn to launch rockets and satellites ...

When will Sierra Space’s winged vehicle, Dream Chaser, finally take flight? Unfortunately, it’s still not clear. Almost certainly, however, it won’t be this year. The Dream Chaser space plane has been ...

Walk off the National Mall and through the new glass entrance of the National Air and Space Museum, and you’re greeted by some of the most important and recognizable flying machines in history. A test ...

The Smithsonian’s National Air and Space Museum will open five new galleries, the Lockheed Martin IMAX Theater and the museum’s redesigned entrance on Jefferson Drive along the National Mall Monday, ...

In my 50-plus years of running money, I’ve noticed that the biggest market moves come from factors that have gone unnoticed – and right now, there’s a doozy lurking under the table. Amid all the ...

Of all the threats that President Donald Trump and Elon Musk hurled at one another as their alliance fell apart, those targeting Musk’s contracts with the US government have the potential to do the ...

Anritsu’s Site Master cable and antenna analyzers are now available with optional vector network analyzer (VNA) and vector voltmeter (VVM) capabilities. These additions extend their use to field ...