Article history: Received 27 May 2014 Accepted 17 April 2015 Available online 20 April 2015 Editor: S. Dodelson We examine the role of using symmetry and effective field theory in inflationary model building. We describe the standard formulation of starting with an approximate shift symmetry for a scalar field, and then introducing corrections systematically in order to maintain control over th...

We present a series of models three-dimensional rotation-symmetric fragile topological insulators in class AI (time-reversal symmetric and spin-orbit-free systems), which have gapless surface states protected by time-reversal ($T$) $n$-fold rotation ($C_n$) symmetries ($n=2,4,6$). Our are generalizations Fu's model spinless crystalline insulator, orbital degrees freedom play the role pseudo-spi...

We study the phase diagram of S = 3/2 and S = 2 bond-alternating spin chains numerically. In previous papers, the phase diagram of S = 1 XXZ spin chain with bond-alternation was shown to reflect the hidden Z2 ×Z2 symmetry. But for the higher S Heisenberg spin chain, the successive dimerization transition occurs, and for anisotropic spin chains the phase structure will be more colorful than the ...

The crystal structure of dicaesium pentadecamolybdenum nonadecasulfide, Cs(2)Mo(15)S(19), consists of a mixture of Mo(6)S(8)S(6) and Mo(9)S(11)S(6) cluster units in a 1:1 ratio. Both units are interconnected via inter-unit Mo-S bonds. The Cs(+) cations occupy large voids between the different cluster units. The Cs and two inner S atoms lie on sites with 3 symmetry (Wyckoff site 12c) and the Mo ...

BACKGROUND Canine breed conformation may interfere with locomotion and may predispose to orthopedic disease. Bulldogs have a high incidence of orthopedic diseases such as hip dysplasia. Kinetic gait analysis provides an objective way to assess and analyze locomotion. The aim of this study was to study the vertical forces of English Bulldogs during walk using a pressure sensitive walkway. We hyp...

BACKGROUND AND PURPOSE Persistent deficits in gait speed and spatiotemporal symmetry are prevalent following stroke and can limit the achievement of community mobility goals. Rehabilitation can improve gait speed, but has shown limited ability to improve spatiotemporal symmetry. The incorporation of combined visual and proprioceptive feedback regarding spatiotemporal symmetry has the potential ...