Abstract. Given a real hyperplane arrangement A, the complement M(A) of the complexification of A admits an action of the group Z2 by complex conjugation. We define the equivariant Orlik-Solomon algebra of A to be the Z2-equivariant cohomology ring of M(A) with coefficients in the field F2. We give a combinatorial presentation of this ring, and interpret it as a deformation of the ordinary Orli...

The fruit-bat genus Pteralopex comprises the monkey-faced bats, a group of six endangered species found only in old-growth forests on certain islands in the south-west Pacific (the Solomon Islands and Fiji). The taxonomy of the genus is reviewed in detail and updated accordingly. Two ‘cryptic’ biological species are shown to occur in sympatry on both Bougainville and Choiseul in the northern So...

Ammonia (NH3) emissions are an economically and environmentally significant loss pathway of fertilizer soil-derived N. Chambers a commonly used method to quantify NH3 in plot-scale agricultural research. Although this is widely used, its accuracy may be influenced by the overall design chamber, components, interaction with environment. Four chamber designs, including open, open + polytetrafluor...

This work introduces three novel chaotic map circuits. Two of the circuit use two p -channel and one xmlns:xlink="http://www.w3.org/1999/xlink">n silicon-on-insulator (SOI) four-gate transistor (G 4 FET) while third design uses G FET. Th...

This research examines a chronic problem in academic settings – inappropriate copying or misuse of source materials–i.e., plagiarism. We conduct a computer-based writing experiment to examine the effects of psychological and situational characteristics on subjects’ propensity to misappropriate text. Specifically, we examine to what extent such misappropriations may be explained by available tec...

Using 3.3 pb of data collected with the CMD-2 detector in the 720 – 840 MeV c.m. energy range, the branching fraction of the conversion decay ω → πee has been measured: B(ω → πee) = (8.19 ± 0.71± 0.62) · 10. The upper limits for the branching fractions of the following conversion decays have been obtained at the 90% confidence level: B(ρ → πee) < 1.6 · 10, B(ρ → ηee) < 0.7 · 10 and B(ω → ηee) <...