Optimized nitrogen (N) management reduces total N application without sacrificing cropyield. However, the underlining mechanisms have not been well investigated, especially lackingthe evidence from roots. Here we performed a two-year field experiment with maize grownunder zero-N, conventional N and optimized N applications and examined grain yield, N,phosphorous (P) and potassium (K) uptake and...

In this paper, results of an investigation on the strain hardening responses of superalloy MP35N with two average grain sizes of 38 and 1 μm, during room temperature tensile testing are reported. The microstructural evolution of the deformed samples was studied using optical and transmission electron microscopy (TEM) techniques. The strain hardening behavior of the 38 μm material was rather sim...

We performed molecular dynamics (MD) simulations to investigate the mechanical properties of polycrystalline graphene. By constructing molecular models of ultra-fine-grained graphene structures, we studied the effect of different grain sizes of 1-10 nm on the mechanical response of graphene. We found that the elastic modulus and tensile strength of polycrystalline graphene decrease with decreas...

In order to fully realize the potential performance benefits of large-scale NUMA shared memory multiprocessors, efficient techniques to reduce/tolerate long memory access latencies in such systems are to be developed. This paper discusses the concept, software and hardware support for memory latency reduction through fine-grain non-transparent thread migration, referred to as mobile multithread...

In this paper we describe our work on enabling fine-grain authorization for resource usage and management. We address the need of Virtual Organizations (VOs) to enforce their own polices in addition to those of the resource owners, both in regard to resource consumption and job management. To implement this design we propose changes and extensions to the Globus Toolkit’s version 2 (GT2) resourc...