In this paper, we present a derivation of the relativistic equations of Quantum Mechanics. We focus on the second order equations (both Klein Gordon’s and Dirac’s), since the linear Dirac equation can ...

But when I read “This is a Love Story” by Jessica Soffer, I was in tears by page four. Out now from Dutton Books at Penguin Random House, “This is a Love Story” (★★★★ out of four ...

Pennsylvania women are at increasing risk of suffering serious health problems during or after their pregnancies, with severe maternal morbidity spiking by 40% since 2016, according to a new report.

A pilot in Alaska safely ejected from an aircraft on Tuesday before it plummeted to the Earth, culminating in a fiery explosion at an Air Force base that was captured in dramatic video footage.

In this study, we present the first integration of the spin-unrestricted similarity-transformed equation-of-motion coupled cluster method (CVS-USTEOM-CCSD) for core-excited and core-ionized states ...

If you want to accentuate the importance of a problem, it seems sensible to explain how prevalent it is. Lots of people are at risk of Alzheimer’s disease. Lots of women carry a gene that makes ...

That’s because the decidedly non-globalist Trump, people here truly believe, could be on the verge of solving maybe the most intractable problem the world faces: The nearly three-year armed ...