Proton conduction properties of nano-titania modified by sulfuric acid impregnation

The proton conduction properties of sulfuric acid-modified nano-titania prepared by impregnation method were investigated. The proton conductivity of sulfuric acid-modified nano-titania was almost the same as that of hydrous sulfated nano-titania investigated in our previous work when the amount of adsorbed sulfate groups was almost the same. The highest conductivity was obtained at an adsorbed sulfate group amount of 0.42?mmol/g, not 0.97?mmol/g. This result indicates that the enhancement of conductivity with increasing amount of adsorbed sulfate groups is limited. This might be attributable to insufficient water molecule adsorption on the Ti⁴⁺ site coordinated with a bidentate sulfate group due to the prevention by excess sulfuric acid.     

Observation of the h(c)(1P) Using e+ e- collisions above the DD threshold

Using 586 pb(-1) of e+ e- collision data at E(c.m.) = 4170 MeV, produced at the Cornell Electron Storage Ring collider and collected with the CLEO-c detector, we observe the process e+ e- → π+ π- h(c)(1P). We measure its cross section to be 15.6±2.3±1.9±3.0 pb, where the third error is due to the external uncertainty on the branching fraction of ψ(2S) → π0 h(c)(1P), which we use for normalization. We also find evidence for e+ e- → ηh(c)(1P) at 4170 MeV at the 3σ level and see hints of a rise in the e+ e- → π+ π- h(c)(1P) cross section at 4260 MeV.     

An affine scaling method with an infeasible starting point: Convergence analysis under nondegeneracy assumption

In this paper, we propose an infeasible-interior-point algorithm for linear programning based on the affine scaling algorithm by Dikin. The search direction of the algorithm is composed of two directions, one for satisfying feasibility and the other for aiming at optimality. Both directions are affine scaling directions of certain linear programming problems. Global convergence of the algorithm is proved under a reasonable nondegeneracy assumption. A summary of analogous global convergence results without any nondegeneracy assumption obtained in [17] is also given.     

Electron distribution in water by high-energy electron scattering

The differential cross-sections for high-energy electrons scattered from water have been measured over a wide range of momentum transfers. The effect of chemical binding was seen from the comparison between the experiment and the calculation for an independent-atom model. The ab initio calculation using SCF MO was carried out with respect to the elastic scattering. It was in a good agreement with the experiment and thus a reliable electron distribution in water was obtained.     

Mössbauer spectroscopy of magnetite microcrystals dispersed in a polyvinyl alcohol film

The formation of magnetite microcrystals in an aqueous solution containing stoichiometric quantities of iron chlorides and polyvinyl alcohol (PVA) at 90 °C has been studied by means of Mössbauer spectroscopy and X-ray diffraction. The crystallite size of the microcrystals was estimated to be 100–200 Å in diameter.     

Komplexbildung zwischen N-Dodecyl-?-alanin und Natriumalkylsulfat im Hinblick auf die Koadsorption aus L?sungsgemisch.

Ohne Zusammenfassung     

Testing of printed circuit board solder joints by speckle correlation techniques

A photographic technique of speckle correlations is demonstrated to produce results analogous to the holographic correlation technique for the testing of printed circuit board solder joints. More stability and simplicity can be obtained by means of the speckle correlation technique which allows the reduction in resolving power that is necessary for the detection process.