We use population genetic models to investigate the cooperative and conflicting synergistic fitness effects between genes from the nucleus and the mitochondrion. By varying fitness parameters, we examine the scope for conflict relative to cooperation among genomes and the utility of the "gene's eye view" analytical approach, which is based on the marginal average fitness of specific alleles. Be...

We use a chemistry-climate model and new estimates of smoke produced by fires in contemporary cities to calculate the impact on stratospheric ozone of a regional nuclear war between developing nuclear states involving 100 Hiroshima-size bombs exploded in cities in the northern subtropics. We find column ozone losses in excess of 20% globally, 25-45% at midlatitudes, and 50-70% at northern high ...

Conflict over Iran’s nuclear program, which involves a US-led policy to impose sanctions on Iran, is perceived by each side as a preeminent challenge to its own national security and global peace. Yet, there is little scientific study or understanding of how material incentives and disincentives, such as economic sanctions, psychologically affect the targeted population and potentially influenc...

In this paper, we summarize our experiment results of applying various optimization techniques for CUDA application running on NVIDIA Fermi GPUs. Our experiments on matrix multiplication and breadth first search algorithms show that optimization techniques such as coalesced global memory access, conflict-free shared memory access and data pre-fetching improve the performance of applications run...

AbstractTheoretical results relating to the facial structure of the general binary integer-programming polytope conv({x ∈ {0, 1} : Ax ≤ b}) where A ∈ r n × R , and b ∈R are presented. A conflict hypergraph is constructed and some induced hyperstars create valid inequalities of . BIP P These inequalities are further shown to produce large dimensional faces. Some computational results show the b...

Previous molecular phylogenetic studies have recovered conflicting hypotheses of relationship among Juniperus (J), Cupressus (C), and Hesperocyparis-Callitropsis-Xanthocyparis (HCX). Conflict between nuclear genes, chloroplast genes, and nuclear and chloroplast data have all been realized in recovering all possible topologies among the three clades. In this study, we use 2.2 kb of aligned seque...