Abstract Radia is a 3D magnetostatics code that widely used to model range of magnets for particle accelerators, with particularly broad usage within the synchrotron light source community. Recently, has been released as open and made available collaborative development on GitHub. A US DOE SBIR grant obtained its upgrade extension. The ongoing improvements are focused core physics engine, perfo...

We estimate the Shakura-Sunyaev viscosity parameter alpha for diierent values of the shear/vorticity ratio, =!, using local simulations of dynamo-generated turbulence. We nd that the time average of is approximately proportional to =! (at least for =! < 10). We point out that this result may have important implications for the properties of thick accretion discs, because there ! is small and wo...

An apparatus was constructed to facilitate superimposition of the beam focus radiogram upon the axial transverse tomogram, in order to guide subsequent radia tion therapy more accurately. The apparatus automatically draws six isodose curves in three colors, by plotting the relative doses of the beam focus radiogram. In addition, the isodose chart was made at the same magnification as that of th...

We estimate the Shakura-Sunyaev viscosity parameter alpha for diierent values of the shear/vorticity ratio, =!, using local simulations of dynamo-generated turbulence. We nd that the time average of is approximately proportional to =! (at least for =! < 10). We point out that this result may have important implications for the properties of thick accretion discs, because there ! is small and wo...

*) Permanent address: Nuclear Engineering Department, North Carolina State University, Raleigh, N.C. 27650, U.S.A. ~b(a, i t ) --0, It > 0, (2b) we seek to find the single scat ter ing a lbedo w and the coefficient b in the scat ter ing law in terms o f f ( i t ) and the presumed measurable r / z ) , It > 0, and ~b(a, It), /z > 0. F r o m Chandra sekha r ' s monumen ta l work [2] on radia t ive...

We present a symbolic analysis of the ephemerizer’s protocol by Radia Perlman, using the CL-Atse tool from the AVISPA’s tool-suite. This protocol allows transmitting a data that will “disappear” (i.e. cannot be retrieved) after a certain time. We show that this protocol is secured for this property plus the secrecy of the data, but is trivially non secured for it’s integrity. Therefore, we pres...

This paper describes experiments on the effects of ultraviolet radiation and of x-rays on the eggs and sperm of the sea urchin Arbacia punclulata, carried out during the summer of 1950.1 These, together with earlier findings already described (Blum and Price, 1950 a, b; Blum, Loos, and Robinson, 1950) permit certain conclusions to be reached regarding the locus of action of these radia-' tions,...