Bark beetles, fuels and future fire hazard in contrasting conifer forests of Greater Yellowstone" (2013). ABSTRACT The extent and severity of bark beetle (Curculionidae: Scolytinae) epidemics and the frequency of large, severe fires have reached unprecedented levels in recent decades, and these trends are expected to continue with ongoing climate change. Insects and fire have tremendous ecologi...

The proposed project is an implementation of speaker recognition systems, both identification and verification. The systems are built using Gaussian Mixture Models, as proposed in several papers from Douglas A. Reynolds. The use of Fractional Covariance Matrix is studied as an possible increase for the traditional recognition systems. keywords: speaker recognition; Gaussian Mixture Models; like...

Using the traditional model of voluntary public good provision, it is shown that an expansion of group size exacerbates free riding tendencies as long as private consumption and the public good are strictly normal and weak gross substitutes. This result generalizes a previous Cobb–Douglas example with respect to preferences and asymmetric equilibria.  2001 Elsevier Science B.V. All rights rese...

The Douglas-Rachford algorithm is widely used in sparse signal processing for minimizing a sum of two convex functions. In this paper, we consider the case where one of the functions is weakly convex but the other is strongly convex so that the sum is convex. We provide a condition that ensures the convergence of the same Douglas-Rachford iterations, provided that the strongly convex function i...

We consider the approximation properties of finite element spaces on quadrilateral meshes. The finite element spaces are constructed starting with a given finite dimensional space of functions on a square reference element, which is then transformed to a space of functions on each convex quadrilateral element via a bilinear isomorphism of the square onto the element. It is known that for affine...

We have analyzed the genetic basis for T cell recognition of an endogenous major histocompatibility complex class II-restricted self peptide. Transgenic mice expressing the influenza virus PR8 hemagglutinin I-Ed-restricted determinant $1 (HA Tg mice) mediate negative selection ofPR8 Sl-specific T cells, but respond to immunization with a virus containing a closely related analogue, $1(Kl13). Se...