We have studied the spin dynamics in Pr0.63Sr0.37MnO3 above and below the Curie temperature TC = 301 K. Three distinct new features have been observed: a softening of the magnon dispersion at the zone boundary for T < TC , significant broadening of the zone boundarymagnons as T → TC , and no evidence for residual spin-wave like excitations just above TC . The results are inconsistent with doubl...

Modelling gravity is a fundamental problem that must be tackled in N -body simulations of stellar systems, and satisfactory solutions require a deep understanding of the dynamical effects of softening. In a previous paper (Romeo 1997), we have devised a method for exploring such effects, and we have focused on two applications that reveal the dynamical differences between the most representativ...

Non-local damage model for strain softening in a machining simulation is presented in this paper. The coupled damage-plasticity model consists of a physically based dislocation density model and a damage model driven by plastic straining in combination with the stress state. The predicted chip serration is highly consistent with the measurement results.

Pravdo et al (1997) claimed that the phase resolved x-ray spectrum in Crab pulsar (PSR B0531+21) shows a spectral hardening at the leading edge of the first peak of its integrated profile (IP); this was a new and unexpected result. This article reanalyzes their data, as well as some other related data, and argues that the spectrum is as likely to be unvarying (i.e., neither hardening nor soften...

Hysteretic and nonlinear dielectric behaviour in ferroelectric ceramics has been of interest since 1950s, when these materials found application in various electronic devices. Presently, these phenomena concern with important areas of science, technology and engineering. In particular, nonlinearity and hysteresis are the key factors in performance, precision and accuracy of modern devices. Many...

esterase in the cucumber. Arch. Biochem. Biophys., 31, 431-441. BELL, T. A., ETCHELLS, J. L., AND JONES, I. D. 1955 A method for testing cucumber salt-stock brine for softening activity. U. S. Dept. Agr., ARS-72-5, 1-15. BELL, T. A. AND ETCHELLS, J. L. 1956 Pectin hydrolysis by certain salt-tolerant yeasts. Appl. Microbiol., 4, 196-201. DEMAIN, A. L. AND PHAFF, H. J. 1957 Recent advances in the...