Observations by the RHESSI satellite of large polarization of the prompt γ-ray emission from the Gamma Ray Burst GRB0212206 (Coburn & Boggs 2003) imply that the magnetic field coherence scale is larger than the size of the visible emitting region, ∼ R/Γ, where R is the radius of the flow, Γ is the associated Lorentz factor. Such fields cannot be generated in a causally disconnected, hydrodynami...

An open supersymmetric t-J chain with boundary fields is studied by means of the Bethe Ansatz. Ground state properties for the case of an almost half-filled band and a bulk magnetic field are determined. Boundary susceptibilities are calculated as functions of the boundary fields. The effects of the boundary on excitations are investigated by constructing the exact boundary S-matrix. From the a...

A theory is presented that allows the Mueller matrix for coherent scattering to be calculated for arbitrary magnetic fields, atomic multiplets, and scattering transitions (Rayleigh or Raman scattering). For the special case of a normal Zeeman triplet (a J = 0 → 1 → 0 scattering transition) a compact analytical form for the scattering matrix is given, which allows us to better see how the variou...

Observations by the RHESSI satellite of large polarization of the prompt γ-ray emission from the Gamma Ray Burst GRB021206 (Coburn & Boggs 2003) imply that the magnetic field coherence scale is larger than the size of the visible emitting region, ∼ R/Γ, where R is the radius of the flow, Γ is the associated Lorentz factor. Such fields cannot be generated in a causally disconnected, hydrodynamic...

It is shown that in the presence of strong magnetic fields, spin-orbit scattering causes a sharp increase in the effective density of states in the variable-range hopping regime when temperature decreases. This effect leads to an exponential enhancement of the conductance above its value without spin-orbit scattering. Thus an experimental study of the hopping conductivity in a fixed, large magn...

.’ The magnetic field measurements in multipole magnetic fields, which are used to measure magnetic field parameters in the strong-focusing lenses for the Stanford two-mile linear accelerator, will be reviewed. Specifically, the theory and the measurement processes used to determine such important parameters as the magnetic center in multipoles, the length of the gradient fields, and the harmon...

For hypotheses of the type H0 : θ = θ0 vs H1 : θ 6= θ0 we demonstrate the equivalence of a Bayesian hypothesis test using a Bayes factor and the corresponding classical test, for a large class of models, which are detailed in the paper. In particular, we show that the role of the prior and critical region for the Bayes factor test is only to specify the type I error. This is their only role sin...

In this study, nonlocal nonlinear instability and the vibration of a double carbon nanotube (CNT) system have been investigated. The Visco-Pasternak model is used to simulate the elastic medium between nanotubes, on which the effect of the spring, shear and damping of the elastic medium is considered. Both of the CNTs convey a viscose fluid and a uniform longitudinal magnetic field is applied t...

a new method for the separation and preconcentration of trace amounts of cadmium in food and water samples by magnetic solid phase extraction (mspe) with fe3o4 magnetic nanoparticles (fe3o4-mnps) and its determination by flame atomic absorption spectrometry has been developed. for this purpose, fe3o4-mnps were synthesized via chemical precipitation method. the extraction of cadmium ions from th...

CoFe2O4 magnetic nanoparticles were modified by dopamine (DA) and ascorbic acid (AA) as anchors. Separation of the DA and AA using CoFe2O4 magnetic nanoparticles have been studied by investigating the effects of pH, concentration of the DA and AA, amount of adsorbents, contact time, ionic strength and temperature. The mechanism of adsorption was also studied. The adsorption of DA and AA to the ...