Theoretical basics and experimental determinations of the coupling parameter of the Strong Interaction, αs, are reviewed. The world average value of αs, expressed at the energy scale of the rest mass of the Z boson, is determined from analyses which are based on complete NNLO perturbative QCD. The result is αs(MZ0) = 0.1184 ± 0.0031. No significant deviations or systematic biases of subsamples ...

Conventional noninvasive methods of evaluation of individuals with suspected coronary artery disease (CAD) have relied on functional testing by an array of modalities, including exercise treadmill testing, stress echocardiography and myocardial perfusion imaging (MPI) with single-photon emission computed tomography (SPECT),1 or positronemission tomography (PET).2 In their most commonly used app...

Introduction: Radiation-induced cardiovascular damage is a potential side effect of radiation therapy in patients with left-sided breast cancer. This prospective study compares the severity and reversibility of perfusion and functional abnormalities before, and six months after, 3D-Conformal radiation therapy treatment in left-side breast cancer patients with conventional and h...

conclusions gated spect mpi has a good correlation with echocardiography for the measurement of left ventricular ef, edv, and esv in patients with severe heart failure. however, the absolute values of these functional parameters from echocardiography and gated spect mpi measured with different software packages should not be used interchangeably. results a good correlation was found between ech...

MPI for Python (mpi4py) has evolved to become the most used binding message passing interface (MPI). We report on various improvements and features that mpi4py gradually accumulated over past decade, including support up MPI-3.1 specification, CUDA-aware implementations, other utilities at intersection of MPI-based parallel distributed computing application development.

Background: Left ventricular mechanical dyssynchrony (LVMD) can be induced after stress test. However, no studies have compared the influence of different stress‑inducing methods on LVMD parameters. Aims: The aim study was to determine whether there is a difference between exercise and adenosine triphosphate (ATP) tests in terms changes parameters assessed using gated single‑photon emission com...

discussion the reason is that we assess the relative and not absolute differences of the tracer uptake in this imaging modality. there may be other findings on mpi images which could help us overcome this pitfall, including detecting wall motion abnormalities, lung uptake of the tracer, or transient ischemic dilation. another important issue is the ecg changes during exercise stress testing, wh...

This paper presents a comparison of two implementations of the MPI standard [1] for message passing: MPI/Pro, a commercial implementation of the MPI standard from MPI Software Technology, Inc., and MPICH, an open source, high-performance, portable MPI implementation. This paper reviews key distinguishing architectural features of the two MPI implementations and presents comparative performance ...