We consider the problem of verifying MPI programs that use MPI_Probe and MPI_Iprobe. Conventional testing tools, known to be inadequate in general, are even more so for testing MPI programs containing MPI probes. A few reasons are: (i) use of the MPI_ANY_SOURCE argument can make MPI probes non-deterministic, allowing them to match multiple senders, (ii) an MPI_Recv that follows an MPI probe nee...

One quarter of all iodinated contrast X-ray clinical imaging studies are now performed on Chronic Kidney Disease (CKD) patients. Unfortunately, the iodine contrast agent used in X-ray is often toxic to CKD patients' weak kidneys, leading to significant morbidity and mortality. Hence, we are pioneering a new medical imaging method, called Magnetic Particle Imaging (MPI), to replace X-ray and CT ...

MPI has proven effective for parallel applications in situations with neither QoS nor fault handling. Emerging environments motivate fault -tolerant MPI middleware. Environments include space -based, wide -area/web/meta computing, and scalable clusters. MPI/FT , the system described here, trades off sufficient MPI fault coverage against acceptable parallel performance, based on mission requirem...

MPI has proven effective for parallel applications in situations with neither QoS nor fault handling. Emerging environments motivate fault-tolerant MPI middleware. Environments include space-based, wide-area/web/meta computing, and scalable clusters. MPI/FT, the system described here, trades off sufficient MPI fault coverage against acceptable parallel performance, based on mission requirements...

Background: Pre-clinical investigation of stem cells for repairing damaged myocardium predominantly used rodents, however large animals have cardiac circulation closely resembling the human heart. The aim of this study was to evaluate whether SPECT/CT myocardial perfusion imaging (MPI) could be used for assessing sheep myocardium following an acute myocardial infarction (MI) and response to int...

Open MPI provides an implementation of the MPI standard supporting native communication over a range of high-performance network interfaces. Los Alamos National Laboratory (LANL) and Oak Ridge National Laboratory (ORNL) collaborated on creating a port for Cray XE and XK systems. That work has continued and with the release of version 1.8 Open MPI now conforms to MPI-2.2 and MPI-3.0 on Cray XE, ...

The MPI datatype functionality provides a powerful tool for describing structured memory and file regions in parallel applications, enabling noncontiguous data to be operated on by MPI communication and I/O routines. However, no facilities are provided by the MPI standard to allow users to efficiently manipulate MPI datatypes in their own codes. We present MPITypes, an open source, portable lib...