[Review of] Flore Zephir, Haitian Immigrants in Black American: A Sociological and Sociolinguistic Portrait

Zephir explores Haitians\u27 identification with Americans through the transitional nature of Haitians\u27 ethnicity, roles of languages, the roles of bilingual educational programs, the generational transmission of Haitian ethnicity, and Haitians\u27 and Black Americans\u27 relationships. For historians and sociologists who are unfamiliar with the history of Haiti and Haitians in American, this book is informative and insightful, especially because of its useful maps and tables. Scholars interested in migration and adaptation are provided with helpful demographic information on Haitians\u27 immigration and settlement in America. Very relevant is a critical discussion of Haiti\u27s history and the resulting effects in the behavior and attitudes of Haitian immigrants in New York

Short-lived lattice quasiparticles for strongly interacting fluids

It is shown that lattice kinetic theory based on short-lived quasiparticles proves very effective in simulating the complex dynamics of strongly interacting fluids (SIF). In particular, it is pointed out that the shear viscosity of lattice fluids is the sum of two contributions, one due to the usual interactions between particles (collision viscosity) and the other due to the interaction with the discrete lattice (propagation viscosity). Since the latter is {\it negative}, the sum may turn out to be orders of magnitude smaller than each of the two contributions separately, thus providing a mechanism to access SIF regimes at ordinary values of the collisional viscosity. This concept, as applied to quantum superfluids in one-dimensional optical lattices, is shown to reproduce shear viscosities consistent with the AdS-CFT holographic bound on the viscosity/entropy ratio. This shows that lattice kinetic theory continues to hold for strongly coupled hydrodynamic regimes where continuum kinetic theory may no longer be applicable.Comment: 10 pages, 2 figure

Deflection of jets induced by jet-cloud & jet-galaxy interactions

The model first introduced by Raga & Canto (1996) in which astrophysical jets are deflected on passing through an isothermal high density region is generalised by taking into account gravitational effects on the motion of the jet as it crosses the high density cloud. The problem is also generalised for relativistic jets in which gravitational effects induced by the cloud are neglected. Two further cases, classical and relativistic, are discussed for the cases in which the jet is deflected on passing through the interstellar gas of a galaxy in which a dark matter halo dominates the gravitational potential. The criteria for the stability of jets due to the formation of internal shocks are discussed.Comment: 8 pages, 5 figures, Accepted for publication in MNRA