More delays at Mount Graham

Observing Conditions at Mount Graham: Vatican Advanced Technology Telescope UBVR Sky Surface Brightness and Seeing Measurements from 1999 through 2003

We present measurements of sky surface brightness and seeing on Mount Graham, obtained at the Vatican Advanced Technology Telescope (VATT) during 16 observing runs between 1999 April and 2003 December. We show that the sky surface brightness is significantly darker during photometric conditions and can be highly variable over the course of a single observing run, as well as from one run to the ...

Turbulence Monitoring at Mount John

In this paper we present preliminary results of a turbulence monitoring campaign at the Mount John University Observatory using a bread-board based SCIDAR (SCIntillation Detection And Ranging) system. Simultaneous SCIDAR and generalised SCIDAR data are captured and used to quantify the turbulence at the site. Initial results, including estimates of key turbulence parameters, are presented and d...

Performance of Co man-Graham schedules in presence of unit communication delays

This paper studies the relative performance of the Co man-Graham algorithm for scheduling unitary tasks on m processors with unitary communication delays. Using a particular decomposition of CG-schedules, we prove that its worst case relative performance is bounded by min(3 3 m; 2m 3 + ). For m = 2, we show that this bound is tight. For m 3, we provide an instance of the problem for which the p...

Developing recovery and monitoring strategies for the endemic Mount Graham Red Squirrels (Tamiasciurus hudsonicus grahamensis) in Arizona

An important challenge in conservation biology is extracting pertinent information from the available data for endangered species. Rarely do we have enough information to precisely determine an organism’s risk of extinction and other factors that affect its management. How, then, can we use limited information to make responsible conservation decisions on controversial species such as the Mount...

Graham Lusk *