Art Nouveau: Jewels and Jewelers

Art Nouveau - European Style in Georgia’s Architecture

The fall of the Byzantine Empire in 1453 caused the ancient Christian country of Georgia to lose its close contacts with Europe for several centuries. Having grown weak because of continuous defensive wars, in 1801 Georgia allied herself with Russia and due to strong and developed historical status in the Caucasus, as well as its central geographical location, Georgia became the political-admin...

Aquatic jewels

what he calls a string of coincidences. A physiologist colleague in Guatemala who happened to have worked with John Vane, then at the Royal College of Surgeons, recommended Moncada to Vane. Once in England, Moncada joined Vane's team, which was then working on the mechanism of action of aspirin and its relationship with prostaglandin synthesis. In 1974, he returned to Honduras to pursue a resea...

Finite Semigroups: Jewels and Problems

Gpx5 protects the family jewels.

Immature spermatozoa are vulnerable to oxidative stress after their release from the testes, due in part to an innate deficiency in antioxidant enzymes. The male reproductive tract compensates for this deficiency by secreting antioxidant enzymes such as glutathione peroxidase 5 (Gpx5) into the epididymal lumen. In this issue of the JCI, Chabory et al. examined the phenotype of Gpx5-/- mice and ...

Generalized jewels and the point placement problem

The point placement problem is to determine the positions of a linear set of points, P = {p1, p2, p3, . . . , pn}, uniquely, up to translation and reflection, from the fewest possible distance queries between pairs of points. Each distance query corresponds to an edge in a graph, called point placement graph (ppg), whose vertex set is P . The uniqueness requirement of the placement translates t...