We investigate the transition and damping of low-energy collective modes in a trapped unitary Fermi gas by solving the Boltzmann-Vlasov kinetic equation in a scaled form, which is combined with both the T-matrix fluctuation theory in normal phase and the mean-field theory in order phase. In order to connect the microscopic and kinetic descriptions of many-body Feshbach scattering, we adopt a ph...

Observations from the first flight of the Medium Scale Anisotropy Measurement (MSAM1-92) are analyzed to search for the Sunyaev-Zel’dovich (SZ) effect towards the Coma cluster. This balloon-borne instrument uses a 28 FWHM beam and a three position chopping pattern with a throw of ±40. With spectral channels at 5.7, 9.3, 16.5, and 22.6 cm, the observations simultaneously sample the frequency ran...

The resonant frequency and sensitivity of an atomic force microscope (AFM) cantilever with assembled cantilever probe (ACP) have been analyzed and a closed-form expression for the sensitivity of vibration modes has been obtained. The proposed ACP comprises an inclined cantilever and extension, and a tip located at the free end of the extension, which makes the AFM capable of topography at sidew...

Experiments are performed in the Large Plasma Device ~LaPD! @Gekelman et al., Rev. Sci. Instrum. 62, 2875 ~1991!# at the University of California, Los Angeles to study the propagation of the shear Alfvén wave in a parallel gradient of the background magnetic field. The waves are excited by modulating a field-aligned electron current drawn to a disk antenna with a radius on the order of the elec...

A = Jacobian matrix a = speed of sound, m∕s C = source term vector E = total energy, J∕kg e = internal energy vector, J∕kg F = inviscid flux tensor Fd = diffusive flux tensor Fo = Forchheimer number G = flux tensor, F − Fd − uU h = enthalpy, J∕kg h = species enthalpy vector, J∕kg hr = recovery enthalpy, J∕kg I = identity matrix J = directional species diffusion flux tensor, kg∕m K = permeabilit...

In the design of high Quality factor (Q) micro or nano beam resonators, different dissipation mechanisms may have damaging effects on the quality factor. One of the major dissipation mechanisms is the thermoelastic damping (TED) that needs an accurate consideration for prediction. In this paper, thermoelastic damping of the longitudinal vibration of a homogeneous micro beam with both ends clamp...

In this paper, a new viscoelastic size-depended model developed based on a modified couple stress theory and the for nonlinear viscoelastic material in order to vibration analysis of a viscoelastic nanoplate. The material of the nanoplate is assumed to obey the Leaderman nonlinear constitutive relation and the von Kármán plate theory is employed to model the system. The viscous parts of the clas...