We compute the homology groups H∗(Out(F7);Q) of the outer automorphism group of the free group of rank 7. We produce in this manner the first rational homology classes of Out(Fn) that are neither constant (∗ = 0) nor Morita classes (∗ = 2n− 4).

In unpublished work, Geelen proved that a matroid is nearregular if and only if it has no minor isomorphic to U2,5, U3,5, F7, F ∗ 7 , F− 7 , (F − 7 ) ∗, AG(2, 3)\e, (AG(2, 3)\e)∗, ∆T (AG(2, 3)\e), or P8. We provide a proof of this characterization.

We describe two different approaches to making systematic classifications of plane lattice polygons, and recover the toric codes they generate, over small fields, where these match or exceed the best known minimum distance. This includes a [36, 19, 12]-code over F7 whose minimum distance 12 exceeds that of all previously known codes.

An organophosphorus-resistant strain of Culex quinquefasciatus was pressured with pyriproxyfen for 17 generations. Egg viability began declining in the F7 generation and became lower as the selection process continued; by the F17 generation egg viability was too low to proceed further. Susceptibility tests on larvae of the F5, F10, F15, and F17 generations showed no indication of increased tole...

Pericytes regulate key neurovascular functions of the brain. Studies in pericyte-deficient transgenic mice with aberrant signaling between endothelial-derived platelet-derived growth factor BB (PDGF-BB) and platelet-derived growth factor receptor β (PDGFRβ) in pericytes have contributed to better understanding of the role of pericytes in the brain. Here, we studied PdgfrβF7/F7 mice, which carry...

A new approach to recognize and predict succedent epileptic seizure by using single channel electroencephalogram (EEG) analysis is proposed. Spectral analysis of a brain time series of the left frontal FP1-F7 (LF) scalp location signal is devoted for seizure prediction and analysis. Important findings showing the presence of preictal spectral changes in studied brain signal are described. Spect...

Pronounced electron–phonon coupling is observed for the F7/2↔F5/2 4 f transitions of Yb doped into CsCdBr3. A comparison of the Raman spectrum and the luminescence excitation sideband accompanying the F7/2(0)→F5/2(28) crystal-field transition reveals vibrational properties of the @YbBr6# coordination unit that differ markedly from those of the CsCdBr3 host. In particular, the vibronic transitio...

The F7/2 ↔ F5/2 optical transitions of Yb3+ doped into Y3Al5O12 (YAG) were studied for potential quantum information and photonic signal processing applications. Absorption and fluorescence spectroscopy located the energy levels of the ground F7/2 and excited F5/2 manifolds, allowing inconsistencies between previous assignments of crystal field splittings in the literature to be resolved. These...