[en] Constructing the temperature-dependent supercharge and Hamiltonian from their expression at zero temperature it has been demonstrated that the supersymmetric graded algebra remains invariant with respect to temperature. Visualizing the effect of temperature on these supersymmetric operators as perturbation, it has been shown that the supersymmetry is broken when these operators or the states (not both) depend on temperature, while it is restored when the mixed picture is taken where the state and operators are both temperature dependent

[en] A review with the main researches about superconductivity are presented, including some developments on the utilization of superconductors materials and the techniques applied. (author)

[en] The issue of crystallization in polymers and its relation with the glassy temperature Tg and the homogeneous nucleation temperature is investigated (M.W.O.)

[en] We study optimal dense coding in the two-qubit and two-qutrit Heisenberg XXX models with Dzyaloshinskii-Moriya anisotropic antisymmetric interaction (DM interaction). Both the DM interaction and the coupling parameter can enhance the maximum dense coding capacity for high temperature. For low temperature, in the two-qutrit system, the coupling parameter still enhances the maximum dense coding capacity, while the DM interaction weakens the capacity of the channel for dense coding.

No abstract available

No abstract available

[en] The pressurized ionization chamber has a pressure-resisting cylindrical casing, connected to ground potential, as well as a cylindrical potential electrode, arranged coaxially to it, and a measuring electrode in the shape of a closed hollow cylinder. This pressurized ionization chamber is mounted to process lines in the open air or near hot material to be measured. It is thus submitted to changes of the outside temperature of e.g. 30K in a very short time. In order to eliminate the dependence of the ioniztion chamber current on these temperature variations, the chamber volume contributing to the result of the measurement is limited to narrow interspaces between the measuring electrode and the wall of the casing. The pressurized ionization chamber has practically got no clearance volume. (DG)

[en] Acoustoelectric current (j_ac) in Free-Standing Graphene (FSG) having degenerate energy dispersion at low temperatures $\mathrm{T}⪡{\mathrm{T}}_{\mathrm{BG}}$ (${\mathrm{T}}_{\mathrm{BG}}$ is the Block-Gruneisen temperature) was studied theoretically. We considered electron interaction with in-plain acoustic phonons in the hypersound regime (sound vibration in the range ${10}^9-{10}^{12}\mathrm{Hz}$). The obtained expression for j_ac was numerically analyzed for various temperatures (T) and frequencies (ω_q) and graphically presented. The non-linear dependence of j_ac on ω_q varied with temperature. This qualitatively agreed with an experimentally obtained result which deals with temperature dependent acoustoelectric current in graphene [21].

No abstract available

No abstract available