Nacre replication: down to the bottom

Bottom-up, top-down

Bottom-Up Beats Top-Down

In PEPA, the calculation of the transitions enabled by a process accounts for a large part of the time for the state space exploration of the underlying Markov chain. Unlike other approaches based on recursion, we present a new technique that is iterative—it traverses the process’ binary tree from the sequential components at the leaves up to the root. Empirical results shows that this algorith...

Learning to Attend - From Bottom-Up to Top-Down

The control of overt visual attention relies on an interplay of bottom-up and top-down mechanisms. Purely bottom-up models may provide a reasonable account of the looking behaviors of young infants, but they cannot accurately account for attention orienting of adults in many natural behaviors. But how do humans learn to incorporate topdown mechanisms into their control of attention? The phenome...

An integrated top-down/bottom-up approach to speaker diarization

Most speaker diarization systems fit into one of two categories: bottom-up or top-down. Bottom-up systems are the most popular but can sometimes suffer from instability from merging and stopping criteria difficulties. Top-down systems deliver competitive results but are particularly prone to poor model initialization which often leads to large variations in performance. This paper presents a ne...

Neurobiological modeling: squeezing top down to meet bottom up

1 INTRODUCTION A cartoon description of the goals of cognitive science and neuroscience might read respectively " how the mind works " and " how the brain works ". In this caricature, there would seem to be little overlap in the vocabularies employed by each domain. The cartoon cognitive scientist could speak at length about decision-making and short-term memory in a relatively self-consistent ...