نتایج جستجو برای: تصویربرداری پرفیوژن میوکارد mpi

تعداد نتایج: 11485  

2016
Mark D. Hanson Nicole N. Woods Maria Athina Martimianakis Raj Rasasingham Kulamakan Kulasegaram

INTRODUCTION Balancing reliability and resource limitations as well as recruitment activities during admission interviews is a challenge for many medical schools. The Modified Personal Interview (MPI) has been shown to have good psychometric properties while being resource efficient for specialized admission interviews. We describe implementation of an MPI adaptation integrating psychometric ri...

2015
Feyzullah Besli Cengiz Basar Ismail Ekinozu Yasin Turker Leischik. Roman

The goal of this study was to evaluate the preejection time (PEP)-derived myocardial performance index (MPI) in hypertensive (HT) patients with sinus rhythm and its relationship to the classic Tei index. One hundred five patients were enrolled in the study (65 HT and 40 control subjects). The mean age of all patients was 50.5 ± 15 years and 60% were female. Echocardiography was performed on all...

2004
Christina Zeeh

The Message Passing Interface (MPI) has become a standard for message passing parallel applications. This report first introduces the underlying paradigm, message passing, and explores some of the challenges explicit message passing poses for developing parallel programs. We then take a closer look at the MPI standardization effort, its goals, and its results to see what features the current ve...

2007
Richard L. Graham Ron Brightwell Brian W. Barrett George Bosilca Jelena Pjesivac-Grbovic

Open MPI was initially designed to support a wide variety of high-performance networks and network programming interfaces. Recently, Open MPI was enhanced to support networks that have full support for MPI matching semantics. Previous Open MPI efforts focused on networks that require the MPI library to manage message matching, which is sub-optimal for some networks that inherently support match...

Journal: :Digital Technical Journal 1996
James V. Lawton John J. Brosnan Morgan P. Doyle Seosamh D. Ó Riordáin Timothy G. Reddin

DEVICE INTERFACE ABSTRACT DEVICE INTERFACE Figure 14 Digital MPI Architecture Table 5 MPI Latency Comparison MPI Implementation Transport Platform Latency MPICH 1.0.10 Sockets FDDI DEC 3000/800 350 ms MPICH 1.0.10 Shared Memory AlphaServer 2100 4/233 30 ms Digital MPI V1.0 MEMORY CHANNEL 1.0 AlphaServer 2100 4/233 16 ms Digital MPI V1.0 MEMORY CHANNEL 1.5 AlphaServer 4100 5/300 6.9 ms Digital M...

Journal: :Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology 2017
Georgios Christopoulos John Bois Thomas G Allison Martin Rodriguez-Porcel Panithaya Chareonthaitawee

OBJECTIVE The diagnostic yield of combined cardiopulmonary exercise testing (CPET) and myocardial perfusion imaging (MPI) in patients referred for stress testing has received limited study. METHODS We evaluated consecutive patients who underwent combined CPET-MPI at a single tertiary referral center between 2011 and 2015. An abnormal CPET was defined as any of the following: reduced oxygen co...

2006
Yuichi Tsujita

In scientific applications, netCDF [1] was developed to support a view of data as a collection of self-describing, portable, and array-oriented objects that can be accessed through a simple interface. Its parallel I/O interface named parallel netCDF (hereafter PnetCDF) was developed with the help of an MPI-I/O library [2] such as ROMIO [3], and the PnetCDF succeeded in scientific computation [4...

Journal: :Parallel Computing 2009
Rajeev Thakur William Gropp

As parallel systems are commonly being built out of increasingly large multicore chips, application programmers are exploring the use of hybrid programming models combining MPI across nodes and multithreading within a node. Many MPI implementations, however, are just starting to support multithreaded MPI communication, often focussing on correctness first and performance later. As a result, bot...

Journal: :CoRR 2015
Sascha Hunold Alexandra Carpen-Amarie

The Message Passing Interface (MPI) is the prevalent programming model used on today’s supercomputers. Therefore, MPI library developers are looking for the best possible performance (shortest run-time) of individual MPI functions across many different supercomputer architectures. Several MPI benchmark suites have been developed to assess the performance of MPI implementations. Unfortunately, t...

Journal: :Concurrency and Computation: Practice and Experience 2016
James Dinan Pavan Balaji Darius Buntinas David Goodell William Gropp Rajeev Thakur

The Message Passing Interface (MPI) 3.0 standard includes a significant revision to MPI’s remote memory access (RMA) interface, which provides support for one-sided communication. MPI-3 RMA is expected to greatly enhance the usability and performance of MPI RMA. We present the first complete implementation of MPI-3 RMA and document implementation techniques and performance optimization opportun...

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