Results 111 to 120 of about 23,606 (263)
American Journal of Botany, EarlyView.Abstract Premise Desert plant assemblages in southern California provide an opportunity to link patterns of community structure with climate‐driven vulnerability in a rapidly changing environment. California sustains an exceptionally diverse flora of approximately 4300 plant species, with 31% identified as endemic.
Hector Zumbado‐Ulate +4 more
wiley +1 more source
Photoneutron Shielding Design for an 18 MV Saturne 20 Medical Linear Accelerator
مجله دانشکده پزشکی اصفهان, 2014 Background: Photoneutrons are produced by high energy photons and electrons interaction with various high-Z nuclei of the materials in the linac head components. These neutrons cause a patient to receive an extra absorbed dose.
Fariba Nadealian-Dastjerdi +4 more
doaj
Optimization of Variance Reduction Techniques used in EGSnrc Monte Carlo Codes. [PDF]
J Med Phys, 2018 Shanmugasundaram S, Chandrasekaran S.
europepmc +1 more source
Vectorization and Parallelization of Transport Monte Carlo Simulation Codes [PDF]
1990 Winter Simulation Conference Proceedings, 1990 openaire +1 more source
Phylogenomic insights into the genus Tulipa (Liliaceae): Taxonomy, evolution, and biogeography
American Journal of Botany, EarlyView.Abstract Premise Tulips are one of the best‐known geophytes, but their taxonomy remains convoluted and their evolutionary history poorly understood. Here, we used plastid genomes to identify some issues with current classification, understand the diversification history of the genus, and identify potential species linked to historical cultivation ...
Brett Wilson +17 more
wiley +1 more source
American Journal of Community Psychology, EarlyView.Abstract Mixed evidence for the influence of structural and social factors on adolescent substance use behaviors exists across the rural–urban continuum. Therefore, this study explores how adolescent perceptions of structural and social community risk factors are associated with lifetime and past 30‐day use of alcohol, marijuana, cigarettes, and ...
Melissa Pearman Fenton +4 more
wiley +1 more source
Applications in Plant Sciences, EarlyView.Abstract Premise In North America, Phragmites australis (common reed) has drawn a great deal of research attention. Non‐native P. australis subsp. australis is a noxious weed that has locally displaced native P. australis subsp. americanus in some areas.
Nicholas P. Tippery +8 more
wiley +1 more source
Development of a Kinetic Monte Carlo Code
, 2013 A framework for constructing kinetic monte carlo (KMC) simulations of diffusive events on a lattice was developed. This code was then tested by running simulations of Fe adatom diffusion on graphene and graphene-boron nitride surfaces. The results from these simulations was then used to show that the modeled diffusion adheres to the laws of brownian ...
openaire +1 more source
The Anatomical Record, EarlyView.Abstract The ray‐finned fishes include one out of every two species of living vertebrates on Earth and have an abundant fossil record stretching 380 million years into the past. The division of systematic knowledge of ray‐finned fishes between paleontologists working on extinct animals and neontologists studying extant species has obscured the ...
Jack Stack
wiley +1 more source