the adsorption study was conducted on three japanese soils with different soil properties to characterize the adsorption pattern of arsenic (as). double tube method was used to find out the effect of soil moisture levels on as adsorption. for this study, besides double tube method, conventional batch method also was used. the as adsorption showed two phase kinetics. an initial and rapid adsorpt...

In the present work, the efficiency of single and double collar in reducing scour rate and depth around cylindrical bridge piers was studied experimentally. In order to reduce the strength of wake vortices, different numbers of bars were also installed at the downstream face of the pier in combination with a single collar. The best result was achieved for double collar when the collars were ins...

The quadrupole channel of two-photon double ionization of He exhibits two distinctly different modes of correlated motion of the photoelectron pair. The kinematics of the mode associated with the center-of-mass motion favors large total momenta maximized at parallel emission where the interelectron repulsion is strong. In contrast, the mode associated with the relative motion favors large relat...

We show that the Iron K emission line from MCG-6-30-15 could be broadened due to Comptonization by a surrounding highly ionized cloud with radius ∼ 10 cms. We calculate the temperature of the cloud to be ∼ 0.21 keV, provided a reasonable estimate of the UV flux is made. The X-ray/γ-ray emission observed from the source is compatible with this model. Such a cloud should be highly ionized and str...

We measure the hadronic branching ratios of the Z boson into heavy quarks: Rb = ΓZ0→bb/ΓZ0→hadrons and Rc = ΓZ0→cc/ΓZ0→hadrons using a multi-tag technique. The measurement was performed using about 400,000 hadronic Z events recorded in the SLD experiment at SLAC between 1996 and 1998. The small and stable SLC beam spot and the CCD-based vertex detector were used to reconstruct bottom and charm ...

There are 63 species of aquatic bugs in Britain, of which 37 are listed as occurring in Scotland (Savage 1989). A preliminary report to Scottish Natural Heritage on the distribution of aquatic bugs in Scotland, supplemented by records for 1997 (Huxley 1997a, 1998), lists 45 (possibly 46) species, albeit a few in this list are very rare or may not still occur. In this article I summarize the fin...

We have made the first measurement of the double-inclusive B/B energy distribution in e + e − annihilations, using a sample of 400,000 hadronic Z 0-decay events recorded in the SLD experiment at SLAC between 1996 and 1998. The small and stable SLC beam spot and the CCD-based vertex detector were used to reconstruct B/B-decay vertices with high efficiency and purity, and to provide precise measu...

We review recent electroweak and B physics results obtained in polarized ee interactions at the SLC by the SLD experiment. Unique and precise measurements of the electroweak parameters Ae, Ab, Ac, Rb and Rc provide powerful constraints on the Standard Model. The excellent 3-D vertexing capabilities of SLD are further exploited to extract precise B and B d lifetimes, as well as measurements of t...

We set a preliminary 95% C.L. exclusion on the oscillation frequency of B 0 s − B 0 s mixing using a sample of 400,000 hadronic Z 0 decays collected by the SLD experiment at the SLC during the 1996-98 run. In this analysis, B 0 s mesons are partially reconstructed by combining a fully reconstructed D s with other B 0 s decay tracks. The D s decays are reconstructed via the φπ and K * K channels...

We measure the hadronic branching ratios of the Z boson into heavy quarks: Rb = ΓZ0→bb/ΓZ0→hadrons and Rc = ΓZ0→cc/ΓZ0→hadrons using a multi-tag technique. The measurement was performed using about 400,000 hadronic Z events recorded in the SLD experiment at SLAC between 1996 and 1998. The small and stable SLC beam spot and the CCD-based vertex detector were used to reconstruct bottom and charm ...