Results 1 - 10 of 47443
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[en] The properties of isoparaffin TBP diluents such as the density, dynamic viscosity, and their temperature dependence are studied. The capacity of the extractant for Pu can be increased. Empirical functions for calculating the maximal extractant capacity (TBP in isoparaffin diluents) as a function of mobility are proposed
[en] Current-voltage (I-V) measurements on Al/fullerene (C60) molecules embedded in polymethyl methacrylate/Al devices at 300 K showed a current bistability due to the existence of the C60 molecules. The on/off ratio of the current bistability for the memory devices was as large as 103. The retention time of the devices was above 2.5 x 104 s at room temperature, and cycling endurance tests on these devices indicated that the ON and OFF currents showed no degradation until 50 000 cycles. Carrier transport mechanisms for the nonvolatile bistable devices are described on the basis of the I-V experimental and fitting results.
[en] Many years and great effort have been spent constructing the microscopic model for the room temperature multiferroic BiFeO3. However, earlier models implicitly assumed that the cycloidal wavevector was confined to one of the three-fold symmetric axes in the hexagonal plane normal to the electric polarization. Because recent measurements indicate that can be rotated by a magnetic field, it is essential to properly treat the anisotropy that confines at low fields. We propose that the anisotropy energy confines the wavevectors to the three-fold axis and within the hexagonal plane with .
[en] The process of complex formation of copper with 1,2,4-three azole thiol in the medium 6 mol/l HCl at 298 K with using of reversible oxidation-reduction system composed of 1,2,4-three azole thiol was studied. It was shown that in the system copper-three azole thiol-6 mol/l-HCl at 298 K the four complex forms were consecutively formed. The constants of these forms formation were defined.
[en] Highlights: ► Heat loads determined with simultaneity factor result in reduced diameters employed. ► We examine the effect of substation types and booster pumps on pipe diameters. ► Network layouts were investigated to prevent temperature drop at summer months. ► Operational changes occurred at network with changing heat demand profiles. - Abstract: The study deals with low-energy District Heating (DH) networks operating in low temperatures such as 55 °C in terms of supply and 25 °C in terms of return. The network layout, additional booster pumps, and different substation types such as storage tanks either equipped or not equipped in domestic hot water production site were examined. Effects of booster pumps on pipe dimensions in the latter case were investigated. Temperature drops during the summer months due to low heat demands of consumers were explored. Use of approaches such as looped networks and branched network layouts with bypasses for end-consumers were also studied, heat loss from these networks and the drop in temperature in the heat-carrier-supply medium being compared.
[en] The Mn0.98CoGe compound can be as alternative refrigerants due to its low cost and large magentocaloric effect near room temperature. However, the narrow work temperature range and the large thermal hysteresis restrict its application. In this work, we investigate the influence of ball milling (BM) time on the thermal hysteresis and magnetocaloric properties of Mn0.98CoGe compound. Results show that the thermal hysteresis of Mn0.98CoGe reduced markedly after BM 5 h, and disappeared completely after BM 12 h. Furthermore, the magnetic entropy change (ΔSM) over a wider temperature span are observed, which leads to the relative cooling power (RCP) of BM-12 h sample as high as those typical refrigerants.