Despite the importance of nitrogen (N) limitation of forest carbon (C) sequestration at rising atmospheric CO2 concentration, the mechanisms responsible are not well understood. To elucidate the interactive effects of elevated CO2 (eCO2) and soil N availability on forest productivity and C allocation, we hypothesized that (1) trees maximize fitness by allocating N and C to maximize their net gr...

introduction: in diagnostic and therapeutic procedures, dosimetric studies are performed on the dosimetric systems in order to comply the radiation safety standards. monte carlo methods are used due to the high complexity and cost of patient-specific phantom construction. the high complexity of the digitized phantoms greatly increases the time and computational task of the monte carlo calculati...

Over the past few years, as part of the Oak Ridge Leadership Class Facility project (OLCF-3), Oak Ridge National Laboratory (ORNL) has been engaged with several third party tools vendors with the aim of enhancing the tool offerings for ORNLs GPU-based platform, Titan. This effort has resulted in enhancements to CAPS’ HMPP compiler, Allinea’s DDT debugger, and the Vampir suite of performance ana...

The workshop titled "US Muon Workshop 2021: A road map for a future Facility" was held virtually on February 1-2, 2021. aimed to bring together world experts in muon spectroscopy ($\mu$SR) and other techniques along with interested stakeholders evaluate the scientific need construct new $\mu$SR facility United States (US). more than 200 participants highlighted several key areas research, inclu...

Introduction Dose calculation of tumor and surrounding tissues is essential during prostate brachytherapy. Three radioisotopes, namely, 125 I, 103 Pd, and 131 Cs, are extensively used in this method. In this study, we aimed to calculate the received doses by the prostate and critical organs using the aforementioned radioactive seeds and to investigate the effect of scattering contribution for t...

Background: The potential hazards of exposure to radiation from radon have been of great concern worldwide, as it is associated with an increased risk of lung cancer. Radon (222Rn) and its progeny are the main sources of radioactivity in the environment. The half-life of 222Rn (3.82 days) is long enough for it to diffuse into and build up in homes. 220Rn or thoron from the 232Th series, and 219...

Since 1964, as an adjunct to its automated technical information processing services to ERDA and other federal agencies, a generalized language translation system has been used by the Oak Ridge National Laboratory (ORNL) to translate Russian scientific text to English. The translation system, first implemented at Georgetown University around 1960, has been rewritten and improved through the yea...