We revisit the Boltzmann equation governing spectrum of energetic particles originating from decay massive progenitors during process thermalization. assume that these decays occur when background temperature $T$ is much less than mass $M$ progenitor. pay special attention to IR cutoff provided by thermal bath, and include suppression resulting interference multiple scattering reactions (LPM ef...

Precision measurements of collective mode frequencies in superfluid (3)He-B are sensitive to quasiparticle and f-wave pairing interactions. Measurements were performed at various pressures using interference of transverse sound in an acoustic cavity. We fit the measured collective mode frequencies, which depend on the strength of f-wave pairing and the Fermi liquid parameter F(2)(s), to theoret...

Abstract The spline coupling is widely used in aero-engines. Once the fails, it will cause great damage to engine. In this paper, stability of a rotor with was studied. internal damping instability model deduced, and mechanism explored. boundary analyzed by using R-H criterion. simulation. An experimental system rotors different structural parameters built. influence positioning surface clearan...

The aim of this study was to investigate the nature of inhibitory processes in early childhood. A confirmatory factor analysis was used to examine the latent structure of inhibitory processes in day-care center children aged 24-32 months and in preschool children aged 36-48 months. The best fit to the data for the younger sample was a single undifferentiated inhibition factor model; in older ch...

A general method is proposed for constructing templates of cells in differential interference contrast (DIC) microscopy. This takes account of the optics which generate DIC images, and is applicable to both transparent and semi-transparent cells of simple and complex shapes. Then, a template matching methodology is presented, which uses fast Fourier transforms to fit templates of a range of siz...

during a period of 7 years (1997-2003) we were received pairs of serum and csf of 27 suspicious clinically cases from neurology department of several hospitals in tehran. among them 7 were serologically positive for progressive rubella panencephalitis (prpe) and 2 were positive for sub acute sclerosing panencephalitis (sspe). rubella virus was isolated from 4 of 7 serologically positive cases o...

Grid computing can be considered large-scale distributed cluster and parallel network processing. The two most important issues in managing user work are resource allocation scheduling of required resources. When jobs submitted, they managed by intermediaries who find allocate the right After stage, scheduled on existing resources according to user's In grid systems with traditional scheduling,...

1 This work has been supported by Spanish Government Grants: TIC 2002-04594-C02-01, FIT-070000-2000-649 and the Spanish-French joint collaboration HF 2001-0055. AbstractThe spread spectrum modulation presents a more robust interference rejection capability than the non code-based modulations. However, the increasing of the communication services has augmented the power of the interference signa...

To optimize the use of the spectrum, it is expected that the next generation of wireless networks (5G) will enable coexistence of newly introduced services with legacy cellular networks. These new services, like Device-To-Device (D2D) communication, should require limited synchronization with the legacy cell to limit the amount of signaling overhead in the network. However, it is known that Cyc...