Materials Literature
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We present a comprehensive theoretical investigation of the electron-phonon contribution to the lifetime broadening of the surface states on Cu(111) and Ag(111), in comparison with high-resolution photoemission results. The calculations, including electron and phonon states of the bulk and the surface, resolve the rel…
The valence band structure of the layered transition metal dichalcogenide ${\mathrm{WS}}_{2}$ has been determined experimentally by angle resolved photoelectron spectroscopy and theoretically by augmented spherical wave band structure calculations as based on density functional theory. Good agreement between experimen…
We investigate the indirect generation of the partial width of the $ω(782)$ meson with respect to the reaction $ω(782) \to ρ(770) π\toπ^+π^-π^0$ within the context of a ``Unitary Effective Resonance Model'' (UERM), which has previously been applied to resonant fermionic field operators, here extended to scalar, pseudo…
Results for the late-time regime of phase ordering in three dimensions are reported, based on numerical integration of the time-dependent Ginzburg-Landau equation with nonconserved order parameter at zero temperature. For very large systems ($700^3$) at late times, $t \ge 150,$ the characteristic length grows as a pow…
Our simulations of polymer crystallization from solutions show that (1) entropic barriers control the selection of the initial lamellar thickness, (2) growth at the crystalline interface is chain adsorption followed by crystallographic registry, and (3) lamellar thickening is a highly cooperative process requiring the…
Systematic changes in the chemistry of evaporated seawater contained in primary fluid inclusions in marine halites indicate that seawater chemistry has fluctuated during the Phanerozoic. The fluctuations are in phase with oscillations in seafloor spreading rates, volcanism, global sea level, and the primary mineralogi…
Abstract A systematic study of the current efficiency (CE) in a laboratory aluminium cell with SnO 2 -based inert anodes was carried out by measuring the overall amount of oxygen relieved at the anode, using two different methods. Inert ceramic anodes of 96% SnO 2 , 2% Sb 2 O 3 , 2% CuO in wt% composition were prepare…
The dynamic conduction of bismuth-containing oxide layered ceramics of the composition Sr 2 Bi 2 TiNb 2 O 12 is investigated in a weak alternating field at frequencies of 0.5–500 kHz in the temperature range 300–700 K. It is demonstrated that the high-temperature conduction can be adequately described in terms of theo…
A novel calix[4]azacrown-4 (2) was prepared, and its single crystal X-ray crystallographic analysis revealed that the carbonyl groups O atoms in 2 interact with amide H in another molecule of 2 by hydrogen bonds in the crystal, thus giving rise to a dimer possessing three “crown ether” rings.
This work presents a study of contact stress phenomena in spherical fruits which generates non-linear relations for force and deformation. The material viscoelastic behavior is then associated with the non-linear relations due to the geometry of the body, generating a non linear viscoelastic problem. Such a nonlineari…
The crystal structure of calcioburbankite (Na,Ca) 3 (Ca, RE ,Sr,Ba) 3 (CO 3 ) 5 found in carbonatites from Vuoriyarvi (North Kareliya) was solved by the Rietveld method. The experimental data were collected on an ADP-2 diffractometer (λCu K α radiation; Ni filter; 16.00° < 2θ < 130.00°; the number of (α 1 + α 2 ) refl…
The variation of the temperatures of martensitic transformations and the rate of radiation damage in TiNi alloys were studied upon irradiation with reactor neutrons. The irradiation was performed at temperatures of 120 and 335 K. In the process of irradiation, electrical resistance of the alloys was measured continuou…
During the last decade, the failure behavior of high-burnup fuel rods under a reactivity-initiated accident (RIA) condition has been a serious concern since fuel rod failures at low enthalpy have been observed. This has resulted in the reassessment of existing licensing criteria and failure-mode study. To address the…
This article analyzes why one cannot rely on an absolute partial discharge (PD) magnitude to assess the insulation condition of rotating machines. How to identify stator insulation deterioration effectively and reliably is discussed and demonstrated by case studies. The paper concludes that trending of PD activity is…
Indium–tin–oxide (ITO) films were prepared by a dip coating method with novel solutions. The dip coating and heating in air at 600°C were repeated to obtain 3- or 10-layer films before annealing in N 2 –0.1%H 2 atmosphere. A 10-layer film (7.0 at.%Sn, ∼ 250 nm-thick) showed the lowest resistivity (3.2×10 -4 Ω·cm). Inc…
Reference 11 should be substituted as follows: 11) A. Leineweber, R. Niewa, H. Jacobs and W. Kockelmann: J. Mater. Chem. 10 (2000) 2827.
The martensitic transformation of a melt spun Ti 5 oNi25Cu25 alloy (cubic B2 s orthorhombic B19) has been investigated by means of thermo-mechanical cycling. The alloy was initially amorphous and it has been characterised after a controlled crystallisation process using differential scanning calorimetry, X-ray diffrac…
Wafer cleaning in semiconductor processes is one of the most critical steps because of the rapid increase in the device integration density and its direct impact on device yield. Highly diluted NH 4 OH solutions to which a nonionic polyoxy-alkylene alkylphenyl ether surfactant was added were evaluated to measure their…
Abstract Small‐amplitude oscillatory measurements, creep and recoil experiments, capillary extrusion flow and shrinkage measurements have been performed to elucidate the effect of block and random chlorinated polyethylene (CPE) on the rheological properties of a ternary high density polyethylene (HDPE)/ poly(vinyl chl…
Two resorcyl di[4-(4-alkoxy-2,3-difluorophenyl)ethynyl]benzoate liquid crystals were prepared and their mesomorphic properties observed and measured. Achiral antiferroelectric phases were seen with increasing length of the hydrocarbon terminal chains.