One contentious question in contemporary election administration is the impact of voter identification requirements. We study a Virginia law which allows us to isolate the impact of requiring voters to show photo identification. Using novel, precinctlevel data, we find that the percentage of registered voters without a driver’s license and over age 85 are both positively associated with the num...

In this paper, we study some new connections between parabolic Liouvilletype theorems and local and global properties of nonnegative classical solutions to superlinear parabolic problems, with or without boundary conditions. Namely, we develop a general method for derivation of universal, pointwise a priori estimates of solutions from Liouville-type theorems, which unifies and improves many res...

The dynamics of the 4-body problem allows for two binary collisions to occur simultaneously. It is known that in collinear this simultaneous collision (SBC) can be block-regularised, but resulting block map only $C^{8/3}$ differentiable. In paper, it proved differentiability persists SBC planar problem. proof uses several geometric tools, namely, blow-up, normal forms, near normally hyperbolic ...

We prove a Liouville type theorem for sign-changing radial solutions of a subcritical semilinear heat equation ut = ∆u + |u|p−1u. We use this theorem to derive a priori bounds, decay estimates, and initial and final blow-up rates for radial solutions of rather general semilinear parabolic equations whose nonlinearities have a subcritical polynomial growth. Further consequences on the existence ...

A numerical simulation is conducted to study the laminar flow past a square cylinder confined in a channel (the ratio of side length of the square to channel width is fixed at 1/4) subjected to a locally uniform blowing/suction speed placed at the top and bottom channel walls. Governing equations with boundary conditions are resolved using a finite volume method in pressure-velocity formulation...

Is there too much criminal law? Are there too many overlapping criminal statutes, covering too much conduct, resulting in sentences that are too long? Douglas Husak says yes, and in this splendid book offers an original and persuasive explanation for why that is so. His argument for a “minimalist” conception of criminal law takes an elegant form. Chapters 2 and 3, which contain Husak’s theory a...

purpose: to determine the prevalence of intraocular injuries in patients with blow-out fracture and also to evaluate the etiologic mechanism of orbital blow-out fractures methods: this study is a consecutive case series analysis of 116 patients with orbital blow-out fractures. the patients were visited by an ophthalmologist within 24 hours of trauma. results: ninety-one men and twenty-five wome...