Let ∆ be the area of the fundamental triangle ABC of barycentric coordinates and let α = cotA, β = cotB, γ = cotC. The vectors vi = [xi, yi, zi] (i = 1, 2) have the scalar product 2∆(αx1x2 + βy1y2 + γz1z2). This fact implies all important formulas about metrical relations of points and lines. The main and probably new results are Theorems 1 and 8.

In this paper, we propose novel retrodirective systems to improve the efficiency and safety of microwave power transmission (MPT) in multipath environments. The system consists an array antenna with phased conjugation circuits it sends back phase-conjugate signal toward pilot transmitted from receiver. It is usually applied for one receiver MPT system, however, Ossia corp. develops new environm...

The Schrödinger equation is investigated in the Euclidean TaubNUT geometry. The bound states are degenerate and an extra degeneracy is due to the conserved Runge-Lenz vector. The existence of the extra conserved quantities, quadratic in four-velocities implies the possibility of separating variables in two different coordinate systems. The eigenvalues and the eigenvectors are given in both case...

The Schrödinger equation is investigated in the Euclidean TaubNUT geometry. The bound states are degenerate and an extra degeneracy is due to the conserved Runge-Lenz vector. The existence of the extra conserved quantities, quadratic in four-velocities implies the possibility of separating variables in two different coordinate systems. The eigenvalues and the eigenvectors are given in both case...

Donald M. Berwick, MD, MPP, the former CMS administrator who is president emeritus and senior fellow at Institute for Healthcare Improvement, discusses cost variation in cancer care found through digital classification system COTA Nodal Address.

The study of the analytical cytology of the bacterial cell was initiated with the work of Schachman et al. (1952), which revealed the presence of a variety of particles in extracts of many microorganisms. Since that time, numerous workers have isolated and characterized some of these particles. This work has been thoroughly reviewed by Alexander (1956). More recent studies (Cota-Robles et al., ...

J. Villavicencio,1,* I. Maldonado,2 E. Cota,3,† and G. Platero4,‡ 1Facultad de Ciencias, Universidad Autónoma de Baja California, Apartado Postal 1880, 22800 Ensenada, Baja California, México 2Avenida Del Fresno 188, Código Postal 22819, Ensenada, B.C., México 3Centro de Nanociencias y Nanotecnologı́a, Universidad Nacional Autónoma de México, Apartado Postal 356, 22860 Ensenada, B.C., México 4In...