We present a unique 2 h ground-based observation of concurrent magnetospheric hiss, chorus, VLF triggered emissions as well as ELF/VLF signals generated locally by the High Frequency Active Auroral Research Program (HAARP) facility. Eccentricity of observed wave polarization is used as a criteria to identify magnetospheric emissions and estimate their ionospheric exit points. The observations o...

Head direction cells change their firing rates as a function of the orientation of an animal within an environment. Typically, these cells display a unimodal tuning curve with maximal firing at the cell's preferred direction. As different cells have different preferred directions, the population of cells has been hypothesized to represent the orientation of the animal within the environment. Pr...

For many applications of scalable multicomputers with distributed memory it is desirable to provide transparent shared virtual memory. For such applications, the hardware and system software must maintain coherency among the local memories. Most existing coherency schemes for multicomputers manage memory uniformly at a single granularity of fixed size pages or cache blocks, leading to unnecessa...

Prolonged observations of moving plaids lead to bi-stable alternations between coherency and transparency. However, most studies of plaids used brief presentations and a 2AFC between the two interpretations, thus overlooking the dynamical aspect of plaid perception. In other domains, most notably binocular rivalry, it was shown that the dynamics of the bi-stable alternations reveal important in...

W E propose a model of some of the typical disturbances affecting an interconnected power system and derive preand post-disturbance models linearized around a base-case solution. These models are used to propose a method for identifying coherency. Security analysis is generally developed for a specified portion of an interconnected power system, called the internal or study system, and which i...

Our research focuses on developing design-oriented analytical tools that enable us to better understand how a network comprising dynamic and static elements behaves when it is set in oscillatory motion, and how the interconnection topology relates to the spectral properties of the system. Such oscillatory networks are ubiquitous, extending from miniature electronic circuits to large-scale power...