A prototype oxide thermoelectric element has been fabricated for the first time, for the application of power generation at high temperatures in air. Sintered bodies of Li0.025Ni0.975O(p-type) and Ba0.4Sr0.6PbO3 (n-type) were directly joined under the uniaxial pressure of 4 MPa at 1123 K for 10 h in air. The thermoelectric properties of this coupled element were measured in the temperature range of 440 to 1060 K. This element was stable and showed no appreciable contact resistance at the junction after a thermal cycle of over 1000 K. The output power and efficiency of the coupled element were calculated to be 14 mW and 0.64%, respectively, on the assumption that the temperatures of the hot and cold sides of the element were 1000 K and 500 K, respectively.
A theory T is called almost No-categorical if for any pure typespl(zl), . . . ,pn(zn) there are only finitely many pure types which extend p 1 (~1 ) U . . . U p~( z , ) .
It is shown that if T is an almost No-categorical theory with I(No,T) = 3, then a dense linear ordering is interpretable in T .Mathematics Subject Classification: 03C45.
Neutron diagnostics are applied to a deuterium plasma mixed with protons in the central cell of the GAMMA 10 tandem mirror [Inutake et al., Phys. Rev. Lett. 55, 939 (1985)]. The deuterium ions are heated with a slow ion cyclotron wave tuned to the fundamental deuterium resonance near the mid-plane of the central cell while the plasma is sustained with the fundamental resonance heating of protons in the minimum-B anchor cells. The measurement is based on in situ calibration to determine the transmission efficiency through machine walls and the counting efficiency of the detection system for neutrons emitted from 252Cf with energy close to that in the deuterium–deuterium (D–D) fusion reaction. The observation shows that the count rate of neutrons increases with diamagnetism, and this relation is accounted for in terms of fusion reaction between deuterium ions with a transverse temperature exceeding 10 keV. Discrepancies among ion temperatures determined with different diagnostics are mostly attributed to insufficient knowledge of the profiles of plasma parameters. The results indicate that the neutron measurement can be added as a powerful diagnostic tool for hot ions if combined with more detailed profile measurements.
Let be a finite relational language and α = (αR: R ∈ ) a tuple with 0 < αR ≤ 1 for each R ∈ . Consider a dimension functionwhere each eR(A) is the number of realizations of R in A. Let Kα be the class of finite structures A such that δα (X) ≥ 0 for any substructure X of A. We show that the theory of the generic model of Kα is AE-axiomatizable for any α.
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