MOUNT WASHINGTON OBSERVATORY, N.H., PROGRESS REPORT

The Chandra X-Ray Observatory: Progress Report and Highlights

Over the past 13 years, the Chandra X-ray Observatory’s ability to provide high resolution X-ray images and spectra have established it as one of the most versatile and powerful tools for astrophysical research in the 21 century. Chandra explores the hot, high-energy regions of the universe, observing X-ray sources with fluxes spanning more than 10 orders of magnitude, from the X-ray brightest,...

Ecological Zones: A Hike Up Mount Washington

Pierre Auger Observatory: Status Report

The Pierre Auger Observatory is a large international effort to provide measurements of extensive air showers (EAS) initiated in the upper atmosphere by cosmic rays with energies above 10 eV , the Ultra High Energy Cosmic Rays (UHECR’s). The explanations for the origin, acceleration processes and composition of the UHECR’s face theoretical and experimental difficulties, due to the extremely low...

Scaling mount concurrency : scalability and progress in concurrent algorithms

As processor speeds plateau, chip manufacturers are turning to multi-processor and multi-core designs to increase performance. As the number of simultaneous threads grows, Amdahl’s Law [6] means the performance of programs becomes limited by the cost that does not scale: communication, via the memory subsystem. Algorithm design is critical in minimizing these costs. In this dissertation, I firs...

Mount and Twiss Report to ISB

Executive Summary Based on the 2000 Record of Decision, an explicit goal of the California Bay-Delta Program is to stabilize and maintain the current configuration of channels and islands in the Delta. This effort is based on the conclusion that hydraulic integrity of the Delta is necessary for meeting water supply, water quality and ecosystem restoration objectives. Landscape level simulations...