The direct design of a linear phase R R one allows perfectly linear phase, but at the expense of the high filter order, N, and consecuently high computational burden for the given specification. IIR filters, however, can be designed with much smaller orders than their R R couterparts, but at the expense of the non-linear phase. It is, however, possible to design almost linearphase IIR filters f...

We present Ripples, a system which enables around each contact point on a touch display these visualizations, provides feedback to the user successes and errors of their touch interactions. Our vis alization system is engineered to be overlaid on top of e isting applications without requiring the applications to be modified in any way, and functions independently of the application’s responses ...

Consolidation of declarative memories requires hippocampal-neocortical communication. Although experimental evidence supports the role of sharp-wave ripples in transferring hippocampal information to the neocortex, the exact cortical destinations and the physiological mechanisms of such transfer are not known. We used a conducting polymer-based conformable microelectrode array (NeuroGrid) to re...

A sedimentological survey of the southwest arm of the Holocene Pigeon Creek tidal lagoon on San Salvador Island, Bahamas was conducted to determine the origin and distribution of calcareous sediments. Transect surveys, surface samples, and sediment cores were collected and examined to determine the abundance and distribution of sediments and sediment producers in the lagoon and associated tidal...

Sharp wave-ripples and interictal events are physiological and pathological forms of transient high activity in the hippocampus with similar features. Sharp wave-ripples have been shown to be essential in memory consolidation, whereas epileptiform (interictal) events are thought to be damaging. It is essential to grasp the difference between physiological sharp wave-ripples and pathological int...

The first-order small slope approximation is applied to model the scattering strength from a rough surface in underwater acoustics to account for seafloor for high frequencies from 10 kHz to hundreds of kilohertz. Emphasis is placed on simulating the response from two-dimensional anisotropic rough surfaces. Several rough surfaces are described based on structure functions such as the particular...

Colonic migrating motor complexes (CMMCs) are spontaneous, anally propagating constrictions, repeating every 3-5 min in mouse colon in vitro. They are regulated by the enteric nervous system and may be equivalent to mass movement contractions. We examined postnatal development of CMMCs and circular muscle innervation to gain insight into mechanisms regulating transit in the maturing colon. Vide...

OBJECTIVES To analyze interictal High frequency oscillations (HFOs) as observed in the medial temporal lobe of epileptic patients and animals (ripples, 80-200Hz and fast ripples, 250-600Hz). To show that the identification of interictal HFOs raises some methodological issues, as the filtering of sharp transients (e.g., epileptic spikes or artefacts) or signals with harmonics can result in "fals...