Can Superflares Occur on Our Sun?

Our Sun: the Nearest Star

Can Baryogenesis Occur on the Lattice?

We examine the question of how baryogenesis can occur in lattice models of the Standard Model where there is a global U(1) symmetry which is accompanied by an exactly conserved fermion number. We demonstrate that fermion creation and annihilation can occur in these models despite this exact fermion number conservation, by explicitly computing the spectral flow of the hamiltonian in the two dime...

Can We Add Auricular Composite Graft to Our Rhinoplasty Armamentarium?

BACKGROUND The ala of the nose, with its particular texture and characteristics, poses both aesthetically and functionally intriguing challenges and is rather problematic regarding choices for reconstructive methods. Both flaps and grafts have been used to restore natural structure of nasal ala. The present study summarizes a ten-year experience of reconstructive surgery using small composite...

Can Chromatography Occur in Nature?

Adsorption of calcium and magnesium on a sandstone from a bicarbonate solution has been demonstrated. On elution with water saturated with carbon dioxide, the magnesium passes off first. The chromatographic separation of magnesium from calcium can thus occur under conditions which can prevail in nature. We ask: Does chromatography play a part in geochemistry? More specifically we ask: Can calci...

Superflares on Ordinary Solar-type Stars

Short duration flares are well known to occur on cool main-sequence stars as well as on many types of ‘exotic’ stars. Ordinary main-sequence stars are usually pictured as being static on time scales of millions or billions of years. Our sun has occasional flares involving up to ∼ 10 ergs which produce optical brightenings too small in amplitude to be detected in disk-integrated brightness. Howe...