Radionuclide myocardial perfusion imaging (MPI) plays a vital role in the evaluation and management of patients with coronary artery disease. However, because of a steep growth in MPI in the mid 2000s, concerns about inappropriate use of MPI and imaging-related radiation exposure increased. In response, the professional societies developed appropriate-use criteria for MPI. Simultaneously, novel...

BACKGROUND Fractional flow reserve (FFR) measured on catheterization is now widely used for the diagnosis of functional myocardial ischemia in patients with coronary artery disease (CAD). FFR, however, is invasive and carries potential procedural complications. Therefore, the aim of this study was to compare the diagnostic capability in functionally significant stenosis identified on FFR, betwe...

This document describes extentions to the MPI-1.2 and MPI-2 standards for introducing process fault-tolerance in MPI.

Initial versions of MPI were designed to work eciently on multi-processors which had very little job control and thus static process models. Subsequently forcing them to support a dynamic process model would have a€ected their performance. As current HPC systems increase in size with greater potential levels of individual node failure, the need arises for new fault tolerant systems to be devel...

While MPI is the most common mechanism for expressing parallelism, MPI programs remain poorly integrated in Unix environments. We introduce MPISH2, an MPI process manager analogous to serial Unix shells. It provides better integration capabilities for MPI programs by providing a uniform execution mechanism for parallel and serial programs, exposing return codes and standard I/O stream information.

Today many high performance computers are collections of shared memory compute nodes with each compute node having one or more multi-core processors. When writing parallel programs for these machines, one can use pure MPI or various hybrid approaches using MPI and OpenMP. Since OpenMP threads are lighter weight than MPI processes, one would expect that hybrid approaches will achieve better perf...

The MPI Forum This paper presents an overview of mpi, a proposed standard message passing interface for MIMD distributed memory concurrent computers. The design of mpi has been a collective eeort involving researchers in the United States and Europe from many organizations and institutions. mpi includes point-to-point and collective communication routines, as well as support for process groups,...

Radiation controls the dynamics and energetics of many astrophysical environments. To capture coupling between radiation matter, however, is often a physically complex computationally expensive endeavour. We develop numerical tool to perform radiation-hydrodynamics simulations in various configurations at an affordable cost. build upon finite volume code MPI-AMRVAC solve equations hydrodynamics...

This paper investigates the performance of UNDP multidimensional poverty index (global MPI) and Millennium Development Goals (MDGs) indicators in impact evaluation SADA-Northern Ghana Village Project (MVP). We find that project had a limited on MDG yet large global MPI. assess robustness MVP MPI we this was largely driven by changes few indicators. conclude living standards, should be used with...