Meteoritic zircons are rare, but some are documented to occur in asteroidal meteorites, including those of the howardite–eucrite–diogenite (HED) achondrite clan (Rubin, A. [1997]. Meteorit. Planet. Sci. 32, 231– 247). The HEDs are widely considered to originate from the Asteroid 4 Vesta. Vesta and the other large main belt asteroids record an early bombardment history. To explore this record, w...

BACKGROUND Public health programs to prevent invasive meningococcal disease (IMD) with monovalent serogroup C meningococcal conjugate vaccine (MCV-C) and quadrivalent meningococcal conjugate vaccines (MCV-4) in infancy and adolescence vary across Canadian provinces. This study evaluated the cost-effectiveness of various vaccination strategies against IMD using current and anticipated future pri...

We consider axisymmetric relativistic jets with a toroidal magnetic field and an ultrarelativistic equation of state, with the goal of studying the lateral structure of jets whose pressure is matched to the pressure of the medium through which they propagate. We find all self-similar steady-state solutions of the relativistic MHD equations for this setup. One of the solutions is the case of a p...

BACKGROUND There has been a significant amount of research in the prevention of throwing injuries. However, one area of research that is lacking is geographic location of play. Warm climates may permit year-round play and increased exposure to throwing arm injury risk. HYPOTHESES (1) Pitchers from southern institutions would have greater rates of ulnar collateral ligament reconstruction (UCL-...

Molecular imaging is a branch of medical imaging science that aims to detect, localize, and monitor critical molecular processes in cells, tissue, and living organisms using highly sensitive instrumentation and contrast mechanisms. This area of medical imaging has developed alongside the emergence of molecular medicine, in which the genetic makeup of each patient factors into treatment planning...

s: Imaging 1 of 66 Femtosecond pump-probe coherent X-ray diffraction imaging of ultra-fast processes Henry N. Chapman, Anton Barty, Stefano Marchesini, Sebastien Boutet, Michael J. Bogan, Stefan P. Hau-Riege, Matthias Frank, Bruce W. Woods, Saša Bajt, J. Hajdu, M. Marvin Seibert, Marion Kuhlmann and Rolf Treusch 1 University of California, Lawrence Livermore National Laboratory, 7000 East Avenu...

We present the results of spectroscopic observations from the ESSENCE high-redshift supernova (SN) survey during its first four years of operation. This sample includes spectra of all SNe Ia whose light curves were presented by Miknaitis et al. (2007) and used in the cosmological analyses of Davis et al. (2007) and Wood-Vasey et al. (2007). The sample represents 273 hours of spectroscopic obser...

BACKGROUND Cephalocondylic intramedullary nails, which are inserted proximally to distally (cephalocondylic), have been used for the surgical treatment of extracapsular hip fractures. OBJECTIVES To compare all cephalocondylic intramedullary nails with extramedullary implants for the surgical treatment of extracapsular hip fractures in adults. This is the fourth substantive update of our origi...