3,940 research outputs found
Pragmatism and Conscience: A Religious Perspective on Competing Values in Embryo Experimentation
Phonetic content influences voice discriminability
We present results from an experiment which shows that voice perception is influenced by the phonetic content of speech. Dutch listeners were presented with thirteen speakers pronouncing CVC words with systematically varying segmental content, and they had to discriminate the speakers’ voices. Results show that certain segments help listeners discriminate voices more than other segments do. Voice information can be extracted from every segmental position of a monosyllabic word and is processed rapidly. We also show that although relative discriminability within a closed set of voices appears to be a stable property of a voice, it is also influenced by segmental cues – that is, perceived uniqueness of a voice depends on what that voice says
Scaling and data collapse from local moments in frustrated disordered quantum spin systems
Recently measurements on various spin-1/2 quantum magnets such as
HLiIrO, LiZnMoO, ZnCu(OH)Cl and 1T-TaS
-- all described by magnetic frustration and quenched disorder but with no
other common relation -- nevertheless showed apparently universal scaling
features at low temperature. In particular the heat capacity C[H,T] in
temperature T and magnetic field H exhibits T/H data collapse reminiscent of
scaling near a critical point. Here we propose a theory for this scaling
collapse based on an emergent random-singlet regime extended to include
spin-orbit coupling and antisymmetric Dzyaloshinskii-Moriya (DM) interactions.
We derive the scaling with at small , with (0,1,2) an integer exponent whose value
depends on spatial symmetries. The agreement with experiments indicates that a
fraction of spins form random valence bonds and that these are surrounded by a
quantum paramagnetic phase. We also discuss distinct scaling for magnetization
with a -dependent subdominant term enforced by Maxwell's relations.Comment: v2. Expanded argument in Appendix 2 and revised for clarity. v3.
Fixed typo in Fig 3 caption. Main text 4 pages 4 figures, Appendix 6 pages 1
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