Growth of crystals of the ternary sulfides Final technical report

Crystal growth of ternary sulfide

Letter from J. R. Winder to Barney Colson

Letter from J. R. Winder to Barney (B. R.) Colson. The one-page handwritten letter is dated 14 September 1912. There is a transcript of the correspondence included in the item PDF

Letter from J. R. Winder to R. B. Colson [sic]

Letter from J. R. Winder to R. B. Colson [sic, should read B. R. Colson]. The one-page handwritten note is dated 7 April 1913

Letter from J. R. Minder to B. R. Colson

Letter from J. R. Minder to B. R. Colson. The one-page handwritten correspondence is on Christian Word and Work letterhead and is dated 22 July 1912. A transcription of the letter is included in the item PDF

Bound-states and polarized charged zero modes in three-dimensional topological insulators induced by a magnetic vortex

By coating a three-dimensional topological insulator (TI) with a ferromagnetic film supporting an in-plane magnetic vortex, one breaks the time-reversal symmetry (TRS) without generating a mass gap. It rather yields electronic states bound to the vortex center which have different probabilities associated with each spin mode. In addition, its associate current (around the vortex center) is partially polarized with an energy gap separating the most excited bound state from the scattered ones. Charged zero-modes also appear as fully polarized modes localized near the vortex center. From the magnetic point of view, the observation of such a special current in a TI-magnet sandwich comes about as an alternative technique for detecting magnetic vortices in magnetic thin films.Comment: 8 pages, 3 figures, new version with more discussions and results accepted for publication in The European Physical Journal

PLASIM: A computer code for simulating charge exchange plasma propagation

The propagation of the charge exchange plasma for an electrostatic ion thruster is crucial in determining the interaction of that plasma with the associated spacecraft. A model that describes this plasma and its propagation is described, together with a computer code based on this model. The structure and calling sequence of the code, named PLASIM, is described. An explanation of the program's input and output is included, together with samples of both. The code is written in ANSI Standard FORTRAN

Fundamental concepts of structural loading and load relief techniques for the space shuttle

The prediction of flight loads and their potential reduction, using various control system logics for the space shuttle vehicles, is discussed. Some factors not found on previous launch vehicles that increase the complexity are large lifting surfaces, unsymmetrical structure, unsymmetrical aerodynamics, trajectory control system coupling, and large aeroelastic effects. These load-producing factors and load-reducing techniques are analyzed