ABSTRACT. Essential oil (EO) was extracted from Melaleuca cajuputi Powell leaves using the steam distillation method. The main aim of this study is to determine several physicochemical properties EO, including acid value, saponification ester relative density, absolute and freezing point. In addition, chemical components were also analyzed gas chromatography–mass spectrometry (GC–MS) obtained 1...

On February 14, 2005, the University of Colorado School of Law welcomed then-Federal Communications Commission Chairman Michael Powell to present a keynote address at the Silicon Flatirons Telecommunications Program Symposium, ‘‘The Digital Migration: Rewriting the ‘96 Telecom Act.’’ After being introduced by thenColorado Secretary of Innovation and Technology Leroy Williams, Chairman Powell wa...

The Beale-Powell restart algorithm is highly useful for large-scale unconstrained optimization. In this paper, we use an example to show that the algorithm may fail to converge. The global convergence of a slightly modiied algorithm is proved.

BACKGROUND Minimization is a case allocation method for randomized controlled trials (RCT). Evidence suggests that the minimization method achieves balanced groups with respect to numbers and participant characteristics, and can incorporate more prognostic factors compared to other randomization methods. Although several automatic allocation systems exist (e.g., randoWeb, and MagMin), the minim...

This paper is concerned with the numerical minimization of energy functionals in BV (Ω) (the space of bounded variation functions) involving total variation for gray-scale 1-dimensional inpainting problem. Applications are shown by finite element method and discontinuous Galerkin method for total variation minimization. We include the numerical examples which show the different recovery image b...

We develop stable splitting of the minimal determining sets for the spaces of bivariate C splines on triangulations, including a modified Argyris space, Clough-Tocher, Powell-Sabin and quadrilateral macro-element spaces. This leads to the stable splitting of the corresponding bases as required in Böhmer’s method for solving fully nonlinear elliptic PDEs on polygonal domains.

We present a multigrid algorithm for the solution of the linear systems that arise from a finite element discretization of second order elliptic partial differential equations with Powell-Sabin splines. We show that the method yields a uniform convergence independent of the mesh size.