Titlebook: ;

乞讨

不能约

The Effect of Polar Groups on the Post-Irradiation Conductivity of Polystyreneation. Low dielectric polarization and good fabrication characteristics make hydrocarbon polymers most suitable, but both the conductivity during irradiation and its decay afterward vary greatly even for the same type of polymer, probably depending on impurities.

cluster

Redox Reactions and the Colours of Ancient Glassesand in coloured glasses. The reactions have been studied by bringing melts to equilibrium in controlled atmospheres and determining at room temperature the quantities of the various species present by chemical analyses and by spectroscopy.

巡回

Some Materials Problems in the Design of Glass Fiber Optical WaveguidesSuch fiber optic composites have been used for many years. A communication system utilizing these glass fibers as the transmission medium is attractive because of the high frequency (large capacity) employed and their small size. However, because of the very high degree of optical transparency requi

Inelasticity

Optical Absorption Characteristics of Copper Ions in Some Binary Alkali Borate Glassess are in octahedral coordination with the surrounding oxygen ligands. No evidence for coordinations other than octahedral was found. There is strong tetragonal distortion which causes the characteristic band in the region of 12,500 Cm. to be broad and asymmetric. The distortion was measured by the f

使成核

Optical Absorption Produced by Silver Particles in Glass and by Sodium Particles in a Sodium Chloridhe particle size. The calculations are made using the theory of Mie modified according to the model of Kreibig and Fragstein to allow for the scattering of the conduction electrons of the metal by the particle surface. The results agree well with the measured spectra from silver particles, whose siz

吸引力

新奇

ARCH

The Influence of Microstructure on Glass StrengthEvidence is presented that the nature of these microstructures may be influenced by the melting conditions, as well as by composition, and that the microstructure has a dominating influence on glass strength.

Forehead-Lift

Static Fatigue in Glassproposed a model to explain the static fatigue of glass in which this reaction is enhanced by the concentration of stress at crack tips in the glass. This stress-enhanced corrosion leads to a sharpening of the crack tip, a still higher stress there, and ultimately failure when the theoretical cohesi