‎Multivariate normal-Poisson model has been recently introduced as a special case of normal stable Tweedie models‎. ‎The model is composed of a univariate Poisson variable‎, ‎and the remaining variables given the Poisson one are independent Gaussian variables with variance the value of the Poisson component‎. ‎Two characterizations of this model are shown‎, ‎...

In recent years, large numbers of lithium-rich stars were discovered near several nearby star forming regions (SFRs). We present a detailed study of those stars discovered in and near the central region of the Taurus-Auriga T Tauri association, based on high-resolution echelle spectroscopy and proper motion data. We find that about 60 per cent of our sample can be regarded as pre-main sequence ...

iii DEDICATION I dedicate this thesis to my sister Dr. Claudia P. Colorado and my brother Rodrigo J. Colorado who have not stopped caring for me since the day I was born. iv ACKNOWLEDGMENTS This project would not have been possible without the invaluable help of many individuals that I would like to acknowledge. First, I would like to express my greatest gratitude to my supervisory advisor and ...

A special ordered set approach for optimizing a discontinuous separable piecewise linear function, This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its fin...

In this paper, we consider convex quadratic semidefinite optimization problems and provide a primal-dual Interior Point Method (IPM) based on a new kernel function with a trigonometric barrier term. Iteration complexity of the algorithm is analyzed using some easy to check and mild conditions. Although our proposed kernel function is neither a Self-Regular (SR) fun...

During the International Society for Technology in Education's (ISTE) 2005 National Educational Computing Conference (NECC), a group of educators began the process of forming a new ISTE Special Interest Group (SIG) on games and simulations. At the group's first meeting, over 100 participants shared their thoughts on games and simulations in education. The group then met online over the next sev...

Using the idea behind the Tillich-Zémor hash function, we propose a new hash function. Our hash function is parallelizable and its collision resistance is implied by a hardness assumption on a mathematical problem. Also, it is secure against the known attacks. It is the most secure variant of the Tillich-Zémor hash function until now.