We propose a class of rank-based procedures for testing that the shape matrix V of an elliptical distribution (with unspecified center of symmetry, scale, and radial density) has some fixed value V0; this includes, for V0 = Ik, the problem of testing for sphericity as an important particular case. The proposed tests are invariant under translations, monotone radial transformations, rotations, a...

A novel small-animal SPECT imager, FastSPECT II, was recently developed at the Center for Gamma-Ray Imaging. FastSPECT II consists of two rings of eight modular scintillation cameras and list-mode data-acquisition electronics that enable stationary and dynamic imaging studies. The instrument is equipped with exchangeable aperture assemblies and adjustable camera positions for selections of magn...

This paper investigates a restricted version of the Quadratic Assignment Problem (QAP), where one of the coefficient matrices is an Anti-Monge matrix with non-decreasing rows and columns and the other coefficient matrix is a symmetric Toeplitz matrix. This restricted version is called the Anti-Monge–Toeplitz QAP. There are three well-known combinatorial problems that can be modeled via the Anti...

We propose a class of rank-based procedures for testing that the shape matrix V of an elliptical distribution (with unspecified center of symmetry, scale, and radial density) has some fixed value V0; this includes, for V0 = Ik, the problem of testing for sphericity as an important particular case. The proposed tests are invariant under translations, monotone radial transformations, rotations, a...

This paper describes the creation ofa new traumatic brain injury (TSI) dass ification system, the Barell+ system, derived by the Center for Army Medical Department Strategic Stud ies, The Barell+ system is an expa nsion of the standar.d international Sarell body region by nature of injury diagnosis matrix developed by the Intemational Collaborative Effort on Injury Statistics.The expanded versi...

Barycenter The mean of the observations from a given category (also called center of gravity, center of mass, mean vector, or centroid) Confidence interval An interval encompassing a given proportion (e.g., 95%) of an estimate of a parameter (e.g., a mean) Discriminant analysis A technique whose goal is to assign observations to some predetermined categories Discriminant factor scores A linear ...

Recently, location-based social networks (LBSNs), such as Gowalla, Foursquare, Facebook, and Brightkite, etc., have attracted millions of users to share their social friendship and their locations via check-ins. The available check-in information makes it possible to mine users’ preference on locations and to provide favorite recommendations. Personalized Point-of-interest (POI) recommendation ...

Introduction Articular cartilage is an important mechanical entity covering the joint surfaces. Damaged cartilage often results in progressive osteoarthritis, because cartilage has a very low self-repairing or self-regenerating capacity [40]. In order to treat osteoarthritis, joint resurfacing, autograft transplants , prosthesis and complete joint replacement have been evaluated [27][47]. Unfor...