The problem of classifying dynamical systems (flows) with global cross-sections in terms of the associated diffeomorphisms of the crosssections is considered. Suppose that, for i = 1,2, ty is a C flow (r > 0) on the Cr manifold M¡ that admits a global cross-section 5, Q M¡ with associated diffeomorphism ('first return map') d¡. If rank (HX(MX ;Z)) = 1, then (Mx,<j)X) is Cs equivalent (s < r) to...

We treat hadron-hadron collisions where the final state is kinematically of the kind associated with double-pomeron-exchange (DPE) and has large transverse momentum jets. We show that in addition to the conventional factorized (FDPE) contribution, there is a non-factorized (NDPE) contribution which has no pomeron beam jet. Within a simple model we compute DPE-two-jet total and differential cros...

A comparison of 4 × 4 multiple-input multiple-output wireless local area network wireless communication characteristics for six different geometrical shapes is investigated. These six shapes include the straight shape corridor with rectangular cross section, the straight shape corridor with arched cross section, the curved shape corridor with rectangular cross section, the curved shape corridor...

In this contribution we summarize experimental information and theoretical results for the dissociation cross sections of charmonium by light hadrons. Theoretical predictions for these RHIC-related processes differ by orders of magnitude over the physically relevant energy range. The results found by the author and collaborators using a constituent interchange model, which predicts cross sectio...

Precision measurements at LEPII provide a unique test of Standard Model predictions. Results from the four LEP collaborations ALEPH, DELPHI, L3 and OPAL on the difermion cross-sections and asymmetries obtained at centre-of-mass energies between 192 and 202 GeV are presented. The high s ′ results are used to determine the running of the electromagnetic coupling constant and the strength of the i...

The UV-visible absorption spectrum of gaseous IONO 2 has been measured over the wavelength range 245–415 nm using the technique of laser photolysis with time-resolved UV-visible absorption spectroscopy. IONO 2 was produced in situ in the gas phase by laser flash photolysis of NO 2 /CF 3 I/N 2 mixtures. Post-flash spectra were deconvolved 5 to remove contributions to the observed absorption from...

The status of W and Z cross-section and width measurements from the CDF and D0 experiments is reviewed. Recent results that are discussed: the cross-section for Z production times the branching ratio to tau pairs, the rapidity and transverse momentum distributions of Z production in the electron channel, and the direct measurements of the W width and the Z invisible width; the latter from an an...

Diameter and Stability When a tree is impacted by a wind force, its cells in the trunk on the windward (wind-exposed) side are stretched, while those on the leeward (wind-sheltered) side are compressed (Figure 1). Furthermore, the tree crown’s own weight has to be added as well, which results in an even higher compression load on the leeward cells and a correspondingly lower tension on the oppo...

In ee and in hadron-hadron reactions at collider energies, prompt photons are observed and their cross sections are measured only if the photons are relatively isolated in phase space. Isolation is required to reduce various hadronic backgrounds including those from the electromagnetic decay of mesons, e.g., π → 2γ. The essence of isolation is that a cone of half-angle δ is drawn about the dire...

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...