Materials Literature
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States that computer simulations of seam pucker were executed. The simulations were based on the computer program which predicts the shape of virtual fabric with an assumption that the relationship between stress and strain of the virtual fabric is linear. The simulations predicted the shape of fabric with the conditi…
This paper reports the fabrication and evaluation of Mo/Al and Mo/Si multilayer films (MLs) for a wavelength of 18.5 nm. Calculated reflectivities of Mo/Al MLs at an incident angle of 10 degrees were about 7% higher than those of Mo/Si MLs. MLs were fabricated using an RF-magnetron sputtering deposition system. The me…
Deformation of a spunbonded nonwoven fabric specimen is extremely nonuniform during a uniaxial tensile test. Complex stress/strain fields are generated in the specimen due to the effect of the jaws, the nonlinear nature of deformation, and the low shear stiffness of the fabric, causing "necking" to take place in the u…
A collection of aerophilous diatoms from northern Madagascar was found to contain two taxa assignable to the modern concept of Orthoseira (but not in the sense of Thwaites). The morphological variability of the valve and cingulum of these two taxa is described and compared. The degree of valve silicification influence…
Dissolution characteristics for the photo-anodization of n-Si with three different doping levels (1015–1019 cm−3) are studied. Three regions are observed: porous layer formation, illumination-limited current plateau and electropolishing. The limiting current is determined by the illumination intensity and the effectiv…
Elastic differential, integral, and momentum-transfer cross sections are reported for electron scattering by ${\mathrm{C}}_{2}{\mathrm{H}}_{4}$ at impact energies ranging from 1 to 50 eV. The Schwinger iterative variational method in the fixed-nuclei, static-exchange plus correlation-polarization approximation is used…
Abstract Two novel liquid crystal display modes are proposed for wide viewing angle applications. One is named as “electrically‐induced optical compensation (EOC) mode”. It adopts the homeotropic alignment, positive dielectric liquid crystal as well as self domain divided method. The other is named as “Reverse Twisted…
A silicon micromechanical magnetometer was constructed and successfully used in 60-tesla pulsed magnetic fields of less than 100-millisecond duration. The device is small, inexpensive to fabricate, and easy to use. It features a fast mechanical response (up to 50,000 hertz) and extremely high sensitivity yet is relati…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXT2-(4'-Nitrenophenyl)-4,4,5,5-tetramethyl-4,5-dihydro- 1H-imidazole-3-oxide-1-oxyl: Photogeneration of a Quartet State Organic Molecule with Both Localized and Delocalized SpinsPaul M. Lahti, Burak Esat, and Richard WaltonView Author Information Department of Chemistry,…
Localized axisymmetric inhomogeneous states with a continuous distribution of the director field can exist in nematics. Such structures are compressed into dense filaments under the influence of a magnetic or electric field. It is hypothesized that the given states can be achieved in filamentary nematic textures. This…
In the flexoelectrooptic (FEO) effect an electric field E, applied perpendicular to the helix axis of a short-pitch cholesteric makes the director turn an angle φ(E) and thereby the optic axis by the same amount. The director rotation is coupled to a periodic splay-bend director pattern (inverse flexoelectric effect)…
It is a well-known fact that the spectra of oxygen-rich circumstellar dust envelopes around evolved stars show great diversity, especially in the 10 μm silicate band profiles, but also in the longer infrared wavelength range covered by ISO. This supports earlier conclusions that the concept of a universal cosmic silic…
Temperature dependencies of magnetic properties were measured in barium-ferrite thin films with grains having in-plane aligned as well as randomly oriented easy axes. The temperature dependence of H/sub c/ was shown to be similar to that of the effective anisotropy field, which is determined by the crystalline and sha…
Real time dosimetry was used to analyze nuclear medicine technologist dose from performing positron emission tomography clinical imaging procedures. The purpose was to identify which tasks in the procedure were the greatest contributors to dose. Results identified the patient positioning task as the single largest sou…
The murein wall in Gram-negative bacteria is so thin that the mechanism of growth is necessarily complicated. From analytical data of murein components, Höltje suggested a model for the growth mechanism that would lead to safe wall enlargement. The model depended on the formation of trimers of peptidoglycan disacchari…
A theory for approximately steady thermal degradation of solids is developed from a superset of nonlinear integral-differential equations. The theory extends previous work, using a degradation model that is more consistent than previously published models and fully accounts for surface radiation losses. The thermal de…
Hydrocarbon radicals, methyl and methylene, are generated through hot nozzle sources and dosed onto Cu(111) at 300 K. High resolution electron energy loss spectroscopic measurements show that for the CH2 exposed sample, the radical not only can be chemisorbed on the surface but also can diffuse and react to form compl…
The structural changes induced by ${}^{3}\mathrm{He}$ in Pd and Pd-based alloys ${\mathrm{Pd}}_{90}{\mathrm{Rh}}_{10}$ and ${\mathrm{Pd}}_{90}{\mathrm{Pt}}_{10}$ during tritium storage have been studied by x-ray diffraction, neutron diffraction, and x-ray absorption. During the first 3 months of aging, the large cell…
A series of water-soluble viologen-linked zinc porphyrins with different methylene chain lengths (n = 3−6) between porphyrin and viologen, ZnP ( C n V ) 4 , were synthesized and characterized. The intra- molecular electron transfer rate constants from the porphyrin moiety of ZnP (C n V ) 4 to viologen were measured by…
Navicula krasskei Hustedt has been considered to belong to the group of diatoms including Fallacia festiva (Krasske) Mann & Stickle and F. monoculata (Hustedt) Mann & Stickle. Examination of N. krasskei in the SEM revealed that this taxon does not, in fact, share features with either Fallacia or Navicula sensu stricto…