To calculate the intensity of x-ray emission in electron beam microanalysis requires a knowledge of the energy distribution of the electrons in the solid, the energy variation of the ionization cross section of the relevant subshell, the fraction of ionizations events producing x rays of interest and the absorption coefficient of the x rays on the path to the detector. The theoretical predictio...

Suppose that M is a smooth manifold and Tt : M → M is a flow, i.e. a one-parameter group of diffeomorphisms. One way of studying this flow is by looking at a cross-section—that is to say, a codimension 1 submanifold N ⊂ M that is transverse to the direction of the flow. The transversality condition implies that each orbit intersects N in a discrete set. In other words, for each point x of M , t...

This study proposes a design procedure for the local buckling strength prediction of cold-formed steel (CFS) built-up I and box section columns based on Effective Width Method (EWM) Direct Strength (DSM). For this, ultimate sections made two plain unlipped channels is obtained using finite element (FE) analysis. First, some compression tests are performed to validate FE models. Then, detailed p...

We calculate the cross sections for the neutral Higgs-boson production at e+e− colliders in the Minimal Supersymmetric Standard Model (MSSM) using the Feynman-diagrammatic approach and the on-shell renormalization scheme. We incorporate the Higgs-boson propagator corrections, evaluated up to two-loop order, into the prediction of the cross sections for the Higgs-boson production mechanism e+e− ...

Abstract The Lingdingyang Bridge is a (580+1666+580m) two-tower three-span sea steel box girder suspension bridge. east anchorage adopts figure eight-shaped ground connecting wall foundation. has diameter of 107.1m and width 65m. thickness 1.5m. the maximum depth 63m, embedded medium weathered granite 5m. overburden nearly 50m, bedrock above 80Mpa 10m, excavation foundation pit 42m. anchor body...

Gas phase conformations of a series of poly(methyl methacrylate) (PMMA) oligomers cationized by sodium ions were investigated experimentally and theoretically. Ion chromatography and molecular mechanics methods were used to measure the cross sections of Na(PMMA)3 to Na(PMMA)11 (i.e. from the 3-mer to the 11-mer). Collision induced dissociation (CID) of Na(PMMA)10 is also reported. The dominant ...

The main idea of this note is to show the most basic and purely mechanistic model of population growth, which has been used by us to create models of interspecific competition for verification of the competitive exclusion principle (1, 2). Our logical deterministic individual-based cellular automata model demonstrates a spatio-temporal mechanism of the S-shaped population growth. A classical mo...