The Volta Review Alexander Graham

The Volta Review Alexander Graham Bell Association for the Deaf and Hard of Hearing

Radion-induced gravitational wave oscillations and their phe- nomenology

Andrei O. Barvinsky∗1, Alexander Yu. Kamenshchik∗∗2,3, Andreas Rathke∗∗∗4,5, and Claus Kiefer†5 1 Theory Department, Lebedev Physics Institute, Leninsky Pr. 53, Moscow 117924, Russia 2 L. D. Landau Institute for Theoretical Physics of the Russian Academy of Sciences, Kosygina street 2, Moscow 117334, Russia 3 Landau Network — Centro Volta, Villa Olmo, via Cantoni 1, 22100 Como, Italy 4 Physikal...

Frailty Screening Tools: Frail Detection to Primary Assessment

Frailty is a vulnerable situation among older adults which can lead to unfavorable health outcomes such as falls, mortality, functional decline and institutionalization. The increasing number of elderly people and low rate of mortality has necessitated the need for high-quality medical services for this aging population, and this has led to a high cost of geriatric health care. There exist a hu...

Partial proof of Graham Higman's conjecture related to coset diagrams

Graham Higman has defined coset diagrams for PSL(2,ℤ). These diagrams are composed of fragments, and the fragments are further composed of two or more circuits. Q. Mushtaq has proved in 1983 that existence of a certain fragment γ of a coset diagram in a coset diagram is a polynomial f in ℤ[z]. Higman has conjectured that, the polynomials related to the fragments are monic and for a fixed degree...

Ultrafast exciton dephasing in semiconducting single-walled carbon nanotubes.

Femtosecond two-pulse degenerate four-wave mixing spectroscopy was applied to study the exciton dephasing in a broad range of excitation intensities and lattice temperatures. We find that both exciton-exciton and exciton-phonon scattering have profound effects on the dephasing process. The dominant phonon mode involved in the dephasing is identified as the out-of-plane, transverse optical mode ...