Field of sudden starts' main impulses near the local absorption region of cosmic radio-noise in the ionosphere

Main impulse fields of magnetic storm sudden starts near local absorption region of cosmic radio noise in ionospher

Was the Magnetic Wake Observed by ''IMP-1'' LUNAR or Terrestrial /ques/

Terrestrial magnetosphere influence on IMP-1 dat

Self-gravitating spheres of anisotropic fluid in geodesic flow

The fluid models mentioned in the title are classified. All characteristics of the fluid are expressed through a master potential, satisfying an ordinary second order differential equation. Different constraints are imposed on this core of relations, finding new solutions and deriving the classical results for perfect fluids and dust as particular cases. Many uncharged and charged anisotropic solutions, all conformally flat and some uniform density solutions are found. A number of solutions with linear equation among the two pressures are derived, including the case of vanishing tangential pressure.Comment: 21 page

Strong dependence of multiphoton detachment rates on the asymptotic behaviour of the ground-state wave function

Two-photon detachment from the F-minus negative ion is investigated within the lowest order of perturbation theory. We show that in accordance with the adiabatic theory a proper asymptotic behaviour of the 2p bound state wave function is crucial for obtaining correct absolute values of the multiphoton detachment cross sections. We find that the latter are substantially higher than it was previously believed.Comment: Latex IOP stile, plus 3 figures in PostScript file

Two-photon detachment of electrons from halogen negative ions

Absolute two-photon detachment cross sections and photoelectron angular distribution are calculated for halogen negative ions within lowest-order perturbation theory. The Dyson equation method is used to obtain the outer np ground-state wave functions with proper asymptotic behavior exp (-k r), corresponding to correct (experimental) binding energies E=k^2/2. The latter is crucial for obtaining correct absolute values of the multiphoton cross sections (Gribakin and Kuchiev 1997 Phys. Rev.A55 3760). Comparisons with previous calculations and experimental data are performed.Comment: Latex, IOP stile, 22 pages, 8 figure

Radiation Emission by Electrons Channeling in Bent Silicon Crystals

Results of numerical simulations of electron channeling and emission spectra are reported for straight and uniformly bent silicon crystal. The projectile trajectories are computed using the newly developed module [1] of the MBN Explorer package [2,3]. The electron channeling along Si(110) crystallographic planes is studied for the projectile energy 855 MeV.Comment: 9 pages, 7 figures; submitted to European Physical Journal D. arXiv admin note: text overlap with arXiv:1307.678

Internal Modes and Magnon Scattering on Topological Solitons in 2d Easy-Axis Ferromagnets

We study the magnon modes in the presence of a topological soliton in a 2d Heisenberg easy-axis ferromagnet. The problem of magnon scattering on the soliton with arbitrary relation between the soliton radius R and the "magnetic length" Delta_0 is investigated for partial modes with different values of the azimuthal quantum numbers m. Truly local modes are shown to be present for all values of m, when the soliton radius is enough large. The eigenfrequencies of such internal modes are calculated analytically on limiting case of a large soliton radius and numerically for arbitrary soliton radius. It is demonstrated that the model of an isotropic magnet, which admits an exact analytical investigation, is not adequate even for the limit of small radius solitons, R<<Delta_0: there exists a local mode with nonzero frequency. We use the data about local modes to derive the effective equation of soliton motion; this equation has the usual Newtonian form in contrast to the case of the easy-plane ferromagnet. The effective mass of the soliton is found.Comment: 33 pages (REVTeX), 12 figures (EPS

Intraoperative ultrasound of the liver

RESUME: Intraoperative ultrasound has become an essential tool for the surgeon in the field of hepatobiliary surgery. No preoperative study has been able to duplicate the sensitivity and specificity of intraoperative ultrasound (IOUS) in the identification of occult lesions. With recent improvements in technology, IOUS has now become an indispensable means of defining the extent of disease and respectability, and providing a guide to an atomic and non-anatomic hepatic resections and minimally invasive and percutaneous ablative techniques. The contrast-enhanced intraoperative ultrasound (CE-IOUS) makes IOUS more accurate, thus enhancing the impact of this technique on operative decision-making for liver tumors. The concept of intraoperative ultrasound (IOUS) was first introduced in the mid-1960s and was used primarily in evaluating choledocholithiasis. More advanced applications were not pursued until the early 1980s, secondary to the limitations of ultrasound technology, which involved large bulky transducers and a relatively poor image quality [1]. Presently, IOUS is a main stay in all oncologic hepatobiliary procedures. Despite all of these technical advances, preoperative detection of preoperative liver lesions remains 60% to 80%. As a reflection of these shortcomings, false negative rates with CT and MRI range from 40% to 70% Table 1 summarizes these findings, the significance of which are demonstrated by several groups citing that in 27% to 49% of cases the operative plan will be changed based on new IOUS findings. These conclusions hold true even in the modern era of advanced preoperative staging. As a result, IOUS has now become a standard part of almost all hepatobiliary cases