In response to recent experimental studies we investigate Coulomb distortion effects on (e, e ′) reactions from medium and heavy nuclei for the case of electrons and positrons. We extend our previously reported full DWBA treatment of Coulomb distortions to the case of positrons for the 208 P b(e, e ′) reaction in the quasielastic region for a particular nuclear model. In addition, we use previo...

A possible measurement of the top quark mass by an energy scan of the tf threshold region at e+ecolliders of fi = 250-500 GeV is discussed. With an integrated luminosity of 1 fb-’ devoted to the energy scan, a top quark msss of about 150 GeV can be determined with an accuracy of M 0.3 GeV, with a comparable systematic uncertainty arising from the few % errors in the cy, measurement at LEP-I. Th...

We have performed a many body calculation of the inclusive (e, e′) cross section which runs over the three traditional regions at intermediate energies: the quasielastic peak, the dip region and the delta region. The longitudinal and transverse response functions in the quasielastic peak have also been evaluated. Traditional effects like polarization, meson exchange currents, final state intera...

Linear instabilities and turbulent processes in equatorial and high-latitude electrojets lead to formation of plasma density irregularities which create much of the common E-region radar clutter. Studies of these irregularities have focused on the role of the Farley-Buneman (FB) and gradient drift instabilities with the assumption that the plasma behaves isothermally or adiabatically. In the la...

In today’s ultra modern world the traditional face to face (F2F)teaching has been replace by e-learning or online learning .Companies find this method very effective to train their employees without using up work hours. E-learning has been implemented by many educational institutions at undergraduate and graduate level in the Gulf region. Blended learning has been adopted by many schools and un...

This proposal is an extension request of the partially approved proposal of JLab E01-011. The experimental goal of the E01-011 experiment was to prove the effectiveness of (e, e’K) hypernuclear spectroscopy by employing the “tilt method” for the electron arm and by installing a new high-resolution kaon spectrometer (HKS) for the kaon arm. It was intended to perform a spectroscopic study of Λ hy...

Radio remote sensing of the ionospheric E region can be difficult, particularly in the nighttime E region valley which lies between two regions of higher electron density. We show that extremely low frequency (ELF) electromagnetic waves launched from below penetrate this region because of their low attenuation and can be reflected from both the D region and the top of the E region valley. This ...

The presence of a hypervariable (HVR) region within the genome of hepatitis E virus (HEV) remains unexplained. Previous studies have described the HVR as a proline-rich spacer between flanking functional domains of the ORF1 polyprotein. Others have proposed that the region has no function, that it reflects a hypermutable region of the virus genome, that it is derived from the insertion and evol...

this paper provides a fuzzy based decision support system (dss) for risk analysis in e-tourism ( electronic tourism ) investment. in general term, e-tourism is the use of information and communication technology (ict) in tourism which may allow operating tourism in least variable cost, least time and increased work efficiency. it is worth noting that there are many factors that affect the deve...

This paper investigates the role of neutral winds in the generation of relatively large polarization electric fields across patchy sporadic-E layers, which then map upward to the F region, to create conditions for medium-scale spreadF . The calculations are based on an analytical model that uses the current continuity equation and field-aligned current closures to the F region in order to descr...