Oak Ridge National Laboratory recently received delivery of a Cray XT3. The XT3 is Cray’s third-generation massively parallel processing system. The system builds on a single processor node—the AMD Opteron—and uses a custom chip—called SeaStar—to provide interprocessor communication. In addition, the system uses a lightweight operating system on the compute nodes. This paper describes our initi...

We analysed the responses of 11 ecosystem models to elevated atmospheric [CO2 ] (eCO2 ) at two temperate forest ecosystems (Duke and Oak Ridge National Laboratory (ORNL) Free-Air CO2 Enrichment (FACE) experiments) to test alternative representations of carbon (C)-nitrogen (N) cycle processes. We decomposed the model responses into component processes affecting the response to eCO2 and confronte...

طیف گامای آنی تولید شده حین تابش پروتون به بافت، برای آنالیز عنصری بافت تحت درمان کار گرفته می‌­شود. هدف اصلی این در پروتون­درمانی ردیابی غلظت اکسیژن تومور است. پایش برخط تغییر عنصر پزشک را سمت ارزیابی روند بهبود و تخمین پاسخ بدن بیمار هدایت می‌­کند. مطالعه گاما یک فانتوم چشم انسان آشکارساز HPGe با استفاده از ابزار Geant4 شبیه‌سازی ­کارگیری شبکه عصبی انجام شد. 33 نمونه حاوی تومورهای متفاوت نظر ...

101 Convening Lead Authors: David L. Feldman, Univ. of California, Irvine; Katharine L. Jacobs, Arizona Water Institute Lead Authors: Gregg Garfin, Univ. of Arizona; Aris Georgakakos, Georgia Inst. of Tech.; Barbara Morehouse, Univ. of Arizona; Pedro Restrepo, NOAA; Robin Webb, NOAA; Brent Yarnal, Penn. State Univ. Contributing Authors: Dan Basketfield, Silverado Gold Mines Inc.; Holly Hartmann...

Statistical analyses of data from epidemi-ologic studies of workers exposed to radiation have been based on recorded annual radiation doses. It is usually assumed that the annual dose values are known exactly, although it is generally recognized that the data contain uncertainty due to measurement error and bias. We propose the use of a probability distribution to describe an individual's dose ...

Statistical analyses of data from epidemiological studies of workers exposed to radiation have been based on recorded annual radiation doses. It is usually assumed that the annual doses are known exactly, although it is generally recognized that the data contain uncertainty due to measurement error and bias. We propose the use of a probability distribution to describe an individual's dose durin...

An intense beam of 122 MeV/u (9.3 GeV) Ge ions was stopped in aluminum samples at the Coupled Cyclotron Facility at NSCL, MSU. Attempts were made at ORNL to measure changes in material properties by measuring changes in electrical resistivity and microhardness, and by transmission electron microscopy characterization, for defect density caused by radiation damage, as a function of depth and int...

The first public release of PVM was version 2.0 in February 1991; the first PVM release from Oak Ridge National Laboratory that supported the Windows operating system was version 3.4 (beta 5) at the end of 1997 and then with the formal release of PVM version 3.4.0 in January 1999. While this initial release provided the PVM framework and functionality to the Windows world, there were a number o...