The porous microstructure of hydrates governs the mechanical strength of the hydrate-bearing sediment. To investigate the growth law and microstructure of hydrates in porous media, the growth process of tetrahydrofuran (THF) hydrate under different concentration of THF solution is directly observed using Magnetic Resonance Imaging (MRI). The images show that the THF hydrate grows as different m...

Despite rapid advances in the complementary fields of speciation genetics and molecular phylogenetics, little attention has been devoted to understanding how genetic changes associated with reproductive isolation accumulate across clades of species. We argue that comparative analyses of reproductive isolation QTL (quantitative trait loci) can generate unique insights into the underlying mechani...

On 7 August 2013, the US Nat­ ional Institutes of Health (NIH) announced that it had reached an agreement with the descendants of Henrietta Lacks concerning NIH­funded uses of the HeLa cell line [1], which, over the past 60 years has been featured in tens of thousands of experiments all over the world, and even in outer space. The origin of these cells, although never a secret, did not become w...

Although first generation genetically modified crops are now the norm in many parts of the world, researchers have failed to convince the public of their benefits and lack of environmental damage in other regions, including Europe. In spite of increasing hopes for the potential in GM crops, particularly in the wake of this year's hike in foodstuff prices, Britain's Prince Charles mounted a stro...

We investigate the behavior of a binary surfactant solution (AOT/water) as it is progressively concentrated in microfluidic evaporators. We observe in time a succession of phase transitions from a dilute solution up to a dense state, which eventually grows and invades the microchannels. Analyzing these observations, we show that, with a few experiments and a limited amount of material, our micr...

We consider the fundamental solution for the Cauchy problem for perturbations of the harmonic oscillator by time dependent potentials, which grow at spatial infinity slower than quadratic, but faster than linear functions, and whose Hessian matrices have a fixed sign. We prove that the fundamental solution at resonant times grows indefinitely at spatial infinity with the algebraic growth rate, ...

in this paper, we introduce a model  to optimization of milk run system that is one of vrp problem with time window and uncertainty in inventory. this approach led to the routes with minimum cost of transportation while satisfying all inventory in a given bounded set of uncertainty .the problem is formulated as a robust optimization problem. since the resulted problem illustrates that grows up ...