The solution of the Klein-Gordon and Dirac equation for the propagator (Green's function) in the very-high-energy limit (1/{ital E} approximation) is studied in the context of quantum ...beamstrahlung.'' The results obtained are necessary to consider bremsstrahlung energy loss by electrons and positrons in high-energy {ital e}{sup +}{ital e}{sup {minus}} linear colliders when multiphoton radiation processes are taken into account. The results can be useful also in other physical processes, e.g., photon radiation in crystals.
Quasi-3D tool to analyse of the radio propagation channel Kurek, K.; Yashchyshyn, Y.; Stefanski, K.
14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562),
2002, Letnik:
3
Conference Proceeding
This paper presents practical tool to analyse of the propagation channel in outdoor and indoor radio communications systems. It is based on geometrical optics and the ray launching technique. A ...quasi-3D model considering 2D propagation in two orthogonal planes (horizontal and vertical) has been used to analyse the three-dimensional propagation of the radio waves inside the buildings.
Undersea cable systems are becoming more complex as they evolve from isolated systems to global networks. This evolution has created new challenges for network planners, cable installers, and those ...responsible for cable maintenance. This paper describes the philosophies and ensuing strategies for these activities. Specifically, the AT&T-Submarine Systems, Inc. (AT&T-SSI) maintenance, repair, management, planning, operation, and administration of cable systems are discussed.
The effect of Fermi motion in the spin polarization of
τ
± leptons produced in quasi-elastic
ν
τ
and
ν
τ
¯
nucleon scattering and Δ resonance production is discussed. The
τ polarization can play role ...in measurement of the
τ appearance rate in neutrino oscillation experiments due to the fact, that decay particle distributions depend on
τ
± spin.
Thesis (M.S.)--University of Toledo, 2010.
Typescript. "Submitted to the Graduate Faculty as partial fulfillment of the requirements for the Masters of Science Degree in Biology." "A thesis ...entitled"--at head of title. Title from title page of PDF document. Bibliography: p. 58-63.
Sum rule of superconvergence type for parity violating amplitudes (p.v. analogue of Gerasimov-Drell-Hearn sum rule) is discussed. Elementary processes initiated by polarized photons in the lowest ...order of electroweak theory are calculated as examples illustrating the validity of the p.v. sum rules. The parity violating polarized photon-induced processes for the proton target are considered in the frame of effective low energy theories and phenomenological models based on p.v. nucleon-meson effective interactions. Assuming the saturation of p.v. sum rule, bounds on the range of parameters, poorly known from existing experimental data and used in these models, are found. The asymmetries for p.v. {pi}{sup 0} and {pi}{sup +} production are discussed. It is argued that verification of the sum rule in future high intensity polarized photon beam experiments is feasible.
PDF
