We focus on how the relative amount of deviatoric and volumetric deformation affects strain accumulation and energy dissipation and find that uniaxial stress conditions lead to the highest rate of strain accumulation and dissipation. A characterization of the molecular-level processes responsible for strain accumulation provides insight into the observed role of volumetric and deviatoric deformations and explains the relatively low strain accumulation for purely deviatoric or volumetric loads. These results may help the design of polymer matrix composites with improved performance under cyclic loading conditions. (C)
2012 Elsevier Ltd. All rights reserved.”
“This paper considers online stochastic reservation problems, where requests find protocol come online and must be dynamically allocated to limited resources in order to maximize profit. Multi-knapsack problems with AZD8931 or without overbooking are examples of such online stochastic reservations. The paper studies how to adapt the online stochastic framework and the consensus and
regret algorithms proposed earlier to online stochastic reservation systems. On the theoretical side, it presents a constant sub-optimality approximation of multi-knapsack problems, leading to a regret algorithm that evaluates each scenario with a single mathematical programming optimization followed by a small number of dynamic programs for one-dimensional knapsacks. It also proposes several integer programming models for handling cancellations and proves their equivalence. On the experimental side, the paper demonstrates the effectiveness of the regret algorithm on multi-knapsack problems ( with and without overbooking) based on the benchmarks proposed earlier.”
“Genetic analysis of plant relies on high yields of pure DNA samples. DNA isolation is difficult in woody plants because of presence of polysaccharides, tannins, alkaloids, polyphenols and other secondary metabolites that interfere during isolation. A quick, simple and improved DNA extraction method for polyphenols Selleckchem MK-0518 and polysaccharide rich leaves of Annona reticulata has been developed. A CTAB based extraction
method which uses diatomite to remove polyphenols and polysaccharide proved to be the best. The DNA isolated by this method allowed recovery of good quality of DNA suitable for PCR amplification and restriction digestion.”
“Objectives: To examine the relationship between hospital volume and patient outcomes for New South Wales hospitals performing oesophagectomy and gastrectomy for oesophagogastric cancer. Design, setting and patients: A retrospective, population-based cohort study of NSW residents diagnosed with a new case of invasive oesophageal or gastric cancer who underwent oesophagectomy or gastrectomy between 2001 and 2008 in NSW hospitals using linked de-identified data from the NSW Central Cancer Registry, the National Death Index and the NSW Admitted Patient Data Collection.