We consider self-similar potential flow for compressible gas with polytropic pressure law. Self-similar solutions arise as large-time asymptotes of general solutions, and as exact solutions of many important special cases like Mach reflection, multidimensional Riemann problems, or flow around corners. Self-similar potential flow is a quasilinear second-order PDE of mixed type which is hyperboli...

Housing typologies in China have changed dramatically over the past hundred years. Economic liberalization is accelerating these changes, shifting the understanding of housing in ways that cannot be explained through Western housing theory. Most of China is moving towards housing in “sealed residential quarters” (gated communities), yet these communities have a role and significance very differ...

High concentrations ofparticulate matter are frequently reported in submarine canyons. This study demonstrates that in Baltimore submarine canyon, elevated concentrations result from periodic resuspension events. The sloping bottom and V-shaped topography of submarine canyons could accelerate tidal flows in the canyon axis sufficiently to cause resuspension, which occurs predominantly at tidal ...

Recent accounting research (Bahnson, P., Miller, P., & Budge, B. ( 1996). Nonarticulation in cash flow statements and implications for education, research and practice. Accouming Horizons, 10, 1-15 has shown that firms implementing the indirect method for reporting cash ftows under SFAS 95 rarely produce financial statements that articulate cleanly. The purposes of this paper are (I) to provide...

Indeed, Margulis [lo] announced that for the geodesic flow on a d-dimensional compact manifold of curvature 1 the number of periodic orbits 7 with (minimal) period r(1) I x is asymptotic to ecd-‘jx/(d 1)x. This result bears a striking resemblance to the prime number theorem. Parry and Pollicott [12], following earlier work by Bowen [2, 41, generalized Margulis’ theorem to weakly mixing Axiom A ...

Let F and r' be lattices, and (p and 4> one-parameter subgroups of the connected Lie groups G and G'. If one of the following conditions (a), (b), or (c) hold, Theorem A states that if the induced flows on the homogeneous spaces G/T and G'/Y' are topologically equivalent, then they are topologically equivalent by an affine map. (a) G and G' are one-connected and nilpotent. (b) G and G' are one-...

This paper is primarily targeted at doctoral students and other researchers considering using inductive approach as a research strategy. We present interpretive research designed to explore the interaction strategies between analysts and clients/users during requirements determination process and the factors that may be at work in such interaction. Using inductive approach can be treated as bot...

In this paper, radiated sound from low Mach number turbulent boundary layers is studied using Lighthill’s analogy. The focus is on investigating the behavior of wall pressure fluctuations on a flexible wall boundary. Comparisons are made between the results from rigid and flexible walls. At low frequencies, the flexible wall results have shown much higher levels of power spectra. At high freque...

Maxwell’s original slip boundary condition is widely misapplied in current rarefied gas flow calculations (e.g. in hypersonics, microfluidics). If its commonly-accepted form is applied in simulations of gas flows over curved or moving surfaces, crucial physics can be lost. We give examples of such cases. We also propose a new higher-order boundary condition which is based on Maxwell’s original ...

Face-to-face contact, even temporary one, helps researchers form personal ties and transfer tacit knowledge. The ability of researchers to colocate, including attendance at international conferences, workshops and seminars, is affected by the administrative barriers to international mobility. This paper uses a gravity-style empirical framework to examine the link between international knowledge...