The unsteady flow characteristics of a supercritical OAT15A airfoil with shock control bump were numerically studied by wall-modeled large eddy simulation. numerical method was first validated the buffet and nonbuffet cases baseline airfoil. Both pressure coefficient velocity fluctuation coincided well experimental data. Then, four different bumps tested. A height h/c = 0.008 location xB/c 0.55...

A nonparametric Bayesian extension of Factor Analysis (FA) is proposed where observed data Y is modeled as a linear superposition, G, of a potentially infinite number of hidden factors, X. The Indian Buffet Process (IBP) is used as a prior on G to incorporate sparsity and to allow the number of latent features to be inferred. The model’s utility for modeling gene expression data is investigated...

BIOPHYSICS AND COMPUTATIONAL BIOLOGY, ENGINEERING Correction for “Biomechanics of red blood cells in human spleen and consequences for physiology and disease,” by Igor V. Pivkin, Zhangli Peng, George E. Karniadakis, Pierre A. Buffet, Ming Dao, and Subra Suresh, which appeared in issue 28, July 12, 2016, of Proc Natl Acad Sci USA (113:7804–7809; first published June 27, 2016; 10.1073/pnas.160675...

A hypergraph is a generalization of a graph in which an edge may contain more than two vertices. Hereditary hypergraphs are particularly important because they arise in mathematics as the class of monotone subsets, in statistics as the class of factorial models, in topology as simplicial complexes and in algebra as the free distributive lattice. An exchangeable random hypergraph consists of a p...

A nonparametric Bayesian extension of Factor Analysis (FA) is proposed where observed data Y is modeled as a linear superposition, G, of a potentially infinite number of hidden factors, X. The Indian Buffet Process (IBP) is used as a prior on G to incorporate sparsity and to allow the number of latent features to be inferred. The model’s utility for modeling gene expression data is investigated...

We propose several search based alternatives for inference in the Indian Buffet Process (IBP) based models. We consider the case when we only want a maximum a posteriori (MAP) estimate of the latent feature assignment matrix. If true posterior samples are required, these MAP estimates can also serve as intelligent initializers for MCMC based algorithms. Another advantage of the proposed methods...

Buffeting is an aeroelastic phenomenon which plagues high performance aircraft, especially those with twin vertical tails like the F/A-18, at high angles of attack. This buffeting is a concern from fatigue and inspection points of view. By means of wind-tunnel and flight tests, this phenomenon is well studied to the point that buffet loads can be estimated and fatigue life can be increased by s...