Commercial HPC applications are often run on clusters that use the Microsoft Windows operating system and need an MPI implementation that runs efficiently in the Windows environment. The MPI developer community, however, is more familiar with the issues involved in implementing MPI in a Unix environment. In this paper, we discuss some of the differences in implementing MPI on Windows and Unix, ...

Malware replicating via USB storage devices including worms, virus, Trojan horses and other malicious codes together with USB based hack tools such as Pod Slurp and USB Switchblade have accounted for many serious security issues for the last few years. The majority of these malicious codes exploit Windows Autoplay features to automatically launch attacks on host computers transparently to the u...

This report examines the time windows used for linear prediction (LP) analysis of speech. The goal of windowing is to create frames of data each of which will be used to calculate an autocorrelation sequence. Several factors enter into the choice of window. The time and spectral properties of Hamming and Hann windows are examined. We also consider windows based on Discrete Prolate Spherical Seq...

Wang-Landau sampling (WLS) of large systems requires dividing the energy range into "windows" and joining the results of simulations in each window. The resulting density of states (and associated thermodynamic functions) is shown to suffer from boundary effects in simulations of lattice polymers and the five-state Potts model. Here, we implement WLS using adaptive windows. Instead of defining ...

Effectively protecting the Windows OS is a challenging task, since most implementation details are not publicly known. Windows has always been the main target of malwares that have exploited numerous bugs and vulnerabilities. Recent trusted boot and additional integrity checks have rendered the Windows OS less vulnerable to kernel-level rootkits. Nevertheless, guest Windows Virtual Machines are...

We present a framework that jointly learns and then uses multiple image windows for improved classification. Apart from using the entire image content as context, class-specific windows are added, as well as windows that target class pairs. The location and extent of the windows are set automatically by handling the window parameters as latent variables. This framework makes the following contr...

The reliability of the radio frequency (RF) windows on the Low Energy Demonstration Accelerator (LEDA) is critical to the success of the Accelerator Production of Tritium Program (APT). On the APT accelerator there will be over 1000 windows, each passing on the order of 250 kW of CW RF power. This power level is well above power levels historically used in RF windows. Based on the high-power RF...

We are once again changing how we use computers. In the past, we moved from mainframes to mini computers to freestanding personal computers. That was a powerful shift in control and organizational structure. Mainframes were rare and, as such, were tended to with loving care and serviced by a small caste of computing priests. In contrast, PCs were everywhere: on every knowledge worker’s desk and...