Dirichlet process mixture (DPM) models tend to produce many small clusters regardless of whether they are needed to accurately characterize the data this is particularly true for large data sets. However, interpretability, parsimony, data storage and communication costs all are hampered by having overly many clusters. We propose a powered Chinese restaurant process to limit this kind of problem...

Following the adaptive-kernel methods in density estimation theory we extend the quantiied maximum entropy concept by locally varying correlations. The smoothing property of the adaptive kernels are determined self-consistently in the framework of Bayesian probability theory with Occam's razor as driving force for the simplest model consistent with the data. The power of the adaptive-kernel app...

We introduce a model for a time series of continuous outcomes, that can be expressed as fully nonparametric regression or density regression on lagged terms. The model is based on a dependent Dirichlet process prior on a family of random probability measures indexed by the lagged covariates. The approach is also extended to sequences of binary responses. We discuss implementation and applicatio...

Abstract Changes in climate and fire regime have long been recognized as drivers of the postglacial vegetation history Yellowstone National Park, but effects locally dramatic hydrothermal activity are poorly known. Multi-proxy records from Goose Lake used to describe Lower Geyser Basin where modern is widespread. From 10,300 cal yr BP 3800 BP, thermal waters discharged into lake, evidenced by d...

At least four active geyser-like eruptions were discovered in Voyager 2 images of Triton, Neptune's large satellite. The two best documented eruptions occur as columns of dark material rising to an altitude of about 8 kilometers where dark clouds of material are left suspended to drift downwind over 100 kilometers. The radii of the rising columns appear to be in the range of several tens of met...

Hydrogen peroxide (H2O2), superoxide (O •− 2 ), and hydroxyl radicals (OH ) are produced in natural waters via ultraviolet (UV) light-induced reactions between dissolved oxygen (O2) and organic carbon, and further reaction of H2O2 and Fe(II) (i.e., Fenton chemistry). The temporal and spatial dynamics of H2O2 and other dissolved compounds [Fe(II), Fe(III), H2S, O2] were measured during a diel cy...