Casting is considered as a major manufacturing process. Thermal analysis of a solidifying medium is of great importance for appropriate design of casting processes. The conventional governing equation of a solidifying medium is based on the Fourier heat conduction law, which does not account for the phase-lag between the heat flux and the temperature gradient. In this paper, the concept of phas...

Thermal properties and transport control are important for many applications, for example, low thermal conductivity is desirable for thermoelectrics. Knowledge of modewise phonon properties is crucial to identify dominant phonon modes for thermal transport and to design effective phonon barriers for thermal transport control. In this paper, we adopt time-domain (TD) and frequency-domain (FD) no...

Nuclear magnetic resonance (NMR) may be used for monitoring temperature changes within samples based on measurements of relaxation times, the diffusion coefficient of liquids, proton resonance frequency or phase shifts. Such methods may be extended to the explicit measurement of the thermal diffusivity of materials by NMR imaging. A method based on measuring nuclear spin phase shifts or changes...

We use a novel formulation of the relaxation time approximation to consistently calculate bulk and shear viscosity coefficients using QCD-inspired energy-dependent times phenomenological thermal masses obtained from fits lattice QCD thermodynamics. The matching conditions are conveniently chosen simplify computations.

This experiment explores nuclear magnetic resonance (NMR) both as a physical phenomenon concerning atomic nuclei and as a ubiquitous laboratory technique for exploring the structure of bulk substances. Using radio frequency bursts tuned to resonance, pulsed NMR perturbs a thermal spin ensemble, which behaves on average like a magnetic dipole. One immediate consequence is the ability to measure ...

The scalable application of quantum information science will stand on reproducible and controllable high-coherence quantum bits (qubits). Here, we revisit the design and fabrication of the superconducting flux qubit, achieving a planar device with broad-frequency tunability, strong anharmonicity, high reproducibility and relaxation times in excess of 40 μs at its flux-insensitive point. Qubit r...

Practical expressions are derived for evaluation of electrical and thermal conductivities and thermopower of degenerate electrons in the outer envelopes of neutron stars with magnetic fields. All tensor components of the kinetic coefficients are calculated (those related to conduction along and across magnetic field and to the Hall currents). The kinetic coefficients are presented as energy ave...

Complex systems such as intermittent dynamics, protein conformational fluctuations and supercooled liquids exhibit a long relaxation time are considered to possess multiple times. We propose stochastic processes with times analytically obtain the exact correlation function. show that time-averaged function calculated by trajectory whose length is shorter than longest exhibits an apparent aging ...

The temperature dependence of the elastic scattering processes qq′ → qq′ and qq̄′ → qq̄′, with q, q′ = u, d, s is studied as a function of the scattering angle and the center of mass energy of the collision within the framework of the SUf (3) Nambu–Jona–Lasinio model. Critical scattering at threshold is observed in the qq̄′ → qq̄′ process, leading to an enhancement of the cross section as occurs in...