Abstract Our view of the variety stellar structures pervading local Milky Way has been transformed by application clustering algorithms to Gaia catalog. In particular, several streams have recently discovered that are comprised hundreds thousands stars and span hundred parsecs. We analyze one such structure, Theia 456, a low-density stream extending nearly 200 pc 20° across sky. By supplementin...

We introduce a new adaptive Bayesian learning framework, called multiple-stream prior evolution and posterior pooling, for online adaptation of the continuous density hidden Markov model (CDHMM) parameters. Among three architectures we proposed for this framework, we study in detail a specific two-stream system where linear transformations are applied to the mean vectors of CDHMMs to control th...

We present an algorithm for real-time adaptive forward error correction (FEC) of MPEG-2 video stream, encapsulated using real-time transport protocol (RTP) and delivered over best-effort networks. Our algorithm provides an efficient method to determine the allocation of redundancy to the MPEG-2 video stream. The redundancy is allocated such that the resulting estimated degradation density funct...

5 This study establishes a mathematical model that can represent the conflicting effects of two 6 pedestrian streams with an oblique intersecting angle in a large crowd. In a previous study, a 7 controlled experiment in which two streams of pedestrians were asked to walk in designated 8 directions was used to model the bi-directional pedestrian stream of certain intersecting angles. In this 9 s...

The concept of landscape legacies has been examined extensively in terrestrial ecosystems and has led to a greater understanding of contemporary ecosystem processes. However, although stream ecosystems are tightly coupled with their catchments and, thus, probably are affected strongly by historical catchment conditions, few studies have directly examined the importance of landuse legacies on st...