A note on oblique water entry

An apparently minor error in Howison, Ockendon & Oliver (J. Eng. Math. 48:321–337, 2004) obscured the fact that the points at which the free surface turns over in the solution of the Wagner model for the oblique impact of a two-dimensional body are directly related to the turnover points in the equivalent normal impact problem. This note corrects some results given in Howison, Ockendon & Oliver (2004) and discusses the implications for the applicability of the Wagner\ud model

Bibliographic Work of Henry R. Wagner

"Encouraged by the cordial reception of his bibliography of The Plains and the Rockies, Mr. H. R. Wagner of Berkeley, California, has in contemplation a companion volume on the Pacific Coast.

Slave Revolt at Battery Wagner

The assault on Battery Wagner: we so often look at that tense moment on a beach in South Carolina from the eyes of the men of the 54th Massachusetts. They hailed from all over the United States. Some were from Pennsylvania, Massachusets, Connecticut - born free and willing to risk it all for the freedom of others. Some were from the American South, former chattel property who had seized their freedom of their own accord. [excerpt

An H-Theorem for the Lattice Boltzmann Approach to Hydrodynamics

The lattice Boltzmann equation can be viewed as a discretization of the continuous Boltzmann equation. Because of this connection it has long been speculated that lattice Boltzmann algorithms might obey an H-theorem. In this letter we prove that usual nine-velocity models do not obey an H-theorem but models that do obey an H-theorem can be constructed. We consider the general conditions a lattice Boltzmann scheme must satisfy in order to obey an H-theorem and show why on a lattice, unlike the continuous case, dynamics that decrease an H-functional do not necessarily lead to a unique ground state.Comment: 6 pages, latex, no figures, accepted for publication in Europhys. Let

Review of \u3cem\u3eThe Poorhouse: America\u27s Forgotten Institution.\u3c/em\u3e David Wagner. Reviewed by Paul H. Stuart.

Book review of David Wagner, The Poorhouse: America\u27s Forgotten Institution. Lanham, MD: Rowman & Littlefield, 2005. $60.00 hardcover,$ 22.95 papercover

A Monte Carlo study of random surface field effect on layering transitions

The effect of a random surface field, within the bimodal distribution, on the layering transitions in a spin-1/2 Ising thin film is investigated, using Monte Carlo simulations. It is found that the layering transitions depend strongly on the concentration $p$ of the disorder of the surface magnetic field, for a fixed temperature, surface and external magnetic fields. Indeed, the critical concentration $p_c(k)$ at which the magnetisation of each layer $k$ changes the sign discontinuously, decreases for increasing the applied surface magnetic field, for fixed values of the temperature $T$ and the external magnetic field $H$. Moreover, the behaviour of the layer magnetisations as well as the distribution of positive and negative spins in each layer, are also established for specific values of $H_s$, $H$, $p$ and the temperature $T$. \\Comment: 5 pages latex, 6 figures postscrip

Are Genetically Robust Regulatory Networks Dynamically Different from Random Ones?

We study a genetic regulatory network model developed to demonstrate that genetic robustness can evolve through stabilizing selection for optimal phenotypes. We report preliminary results on whether such selection could result in a reorganization of the state space of the system. For the chosen parameters, the evolution moves the system slightly toward the more ordered part of the phase diagram. We also find that strong memory effects cause the Derrida annealed approximation to give erroneous predictions about the model's phase diagram.Comment: To be published in Computer Simulation Studies in Condensed-Matter Physics XX. Ed. by D.P. Landau, S. P. Lewis, H.-B. Schuttler (Springer-Verlag, Berlin Heidelberg New York