Résumé— Cet article est une introduction au calcul et à l’optimisation sur les matrices symétriques positives semidéfinies de rang (faible) fixé. L’approche proposée est basée sur deux géométries riemanniennes quotient, qui permettent de calculer efficacement tout en préservant le rang et le caractère positif des matrices considérées. Le champ d’applications est vaste, et l’article survole quel...

Rang highlighted many of the practical aspects of caring for children's fractures, including forearm fractures. Contrary to the forearm shaft fracture rotational dogma of others, Rang said, “Immobilize the fracture in the position—any position [rotation]—in which the alignment is correct and the reduction feels stable. He also discussed the value of single-bone internal fixation with a Kirschne...

There are two critical interfaces that must be crossed when deploying any technological product. These are the hand-off from research to development and the hand-off from development to commercialization. These interfaces are frequently problematic, and are especially problematic when the technology being deployed is based on artificial intelligence. This paper will present our analysis of the ...

abstract in the current decade the third world's countries are using of development rural tourism approach to improve indexes of development. in iran due to multiplicity of rural area using of this strategy is important. analysis the condition of host area for achieving positive tourism impacts is necessary. in this paper, the challenges and opportunities on developing rural tourism is distingu...

The distinguished work by A.A. Abrikosov awarded of the Nobel Prize in Physics for 2003 not only has determined the orientation of all investigations of the mixed state of type II superconductors during forty years but also has provoked a mass delusion. Most scientists consider the Abrikosov state first of all as a vortex lattice. But Abrikosov has found a periodic lattice structure with crysta...