16,124 research outputs found
Glass-to-metal seals comprising relatively high expansion metals
A glass suitable for glass-to-metal seals that has a resistance to attack by moisture and a high coefficient of linear thermal expansion is introduced. Linear expansion covers the range from 12 to 14 x 10 to the minus 6 C between room temperature and 500 C. The glass is essentially composed of, by molar percent, about 9% of K2O, about 10% of Na2O, about 70% of SiO2, about 6% Al2O3, and about 5% of MgO
Classical Radiation Formula in the Rindler Frame
In a preceding paper [T. Hirayama, Prog. Theor. Phys. 106 (2001), 71], the
power of the classical radiation emitted by a moving charge was evaluated in
the Rindler frame. In this paper, we give a simpler derivation of this
radiation formula, including an estimation of the directional dependence of the
radiation. We find that the splitting of the energy-momentum tensor into a
bound part I' and an emitted part II' is consistent with the three conditions
introduced in the preceding paper, also for each direction within the future
light cone.Comment: 11 pages, 1 figure adde
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