WG Sebald, who died in a car crash in 2001, was an inspired essayist, quite as much as he was a novelist; indeed, I often think of his most achieved fictions – Austerlitz, and The Emigrants – as writing that tests the limits of both forms, blending them together at their margins with a kind of vaporous diffusion of their creator's lucidity, so entirely are the invented and the real fused together.
We therefore could ask, somewhat provocatively, whether men and women of the 20th century suffer from or enjoy a kind of identity diffusion.
Following work of Dosanjh and Pagni, a late time solution is constructed, characterized by two reaction fronts—an exothermic oxidation front, an unusual kind of diffusion flame; and an endothermic pyrolysis front.
Accordingly, a forward smolder wave may be regarded as a special kind of diffusion flame with fuel Lewis number tending to infinity.
When (gamma=0) in (1.1), we obtain the standard Fisher-Kolmogorov equation, which is a kind of classical second-order diffusion equation (see [1, 2] and so on).
The most common approximations for this kind of diffusion include the short gradient pulse (SGP) and Gaussian phase distribution (GPD) [ 9, 13, 39].
Another kind of diffusion NMR experiment using the PFGSTE pulse sequence was also carried out in which the echo intensity was measured by varying Δ while keeping all the other parameters including δ and g constant.
The time fractional sub-diffusion equation (FSDE) is a kind of linear integro-differential equation which can be obtained from the classical diffusion equation by employing fractional derivatives of order α to describe the procedure of anomalous diffusion, where (alphain 0,1)).
Fractional differential equations (FDEs) have been used as a kind of model to describe several physical phenomena [2 6] such as damping laws, rheology, diffusion processes, and so on.
