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Alloys made from equimolar mixtures of more than five elements exhibit an improved thermal diffusivity at elevated temperatures, and the improvement reaches 20% at 423 K and 50% at 573 K. This phenomenon is identified from the lengthened mean free path upon thermal expansion, and lengthening scales with lattice dilation over a wide range of temperatures.

Field induced displacement of carbon nanotubes is detected within a bundle and intertube friction is calculated via cohesive energy and electromagnetic formula. Tube-tube friction is found to be 1.4×10−4N which is five orders of magnitude greater than value obtained between adjacent layers within a nanotube.

Distributed Shared Memory systems provide the abstraction of a shared address space among computing hosts interconnected via a private network, in a convenient and easy way to achieve high performance. However, there are several drawbacks to these systems, such as communication overhead, network latency, false sharing, coherence and page faults. By prefetching, one can overlap communication and computation though the Accumulated Waiting Phenomenon and the Waiting Synchronization Phenomenon affect overall performance. In this paper, an Effective Prefetch Strategy (EPS) is proposed, to improve the shortcomings of previous prefetching approaches and increases the prefetch page hit rate. In addition, our EPS strategy reduces the waiting time for each computing host upon barrier synchronizations and misprefetches. Experimental comparisons show that our proposed EPS strategy offers the best performance among existing prefetching strategies.

Annealing of carbon nanotubes coated with thin and uniform TiO 2 results in carbon diffusion into oxygen lattices and doping induced redshift is evident by an efficient photocatalysis at visible light. The underlying mechanism is discussed.