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This paper presents data from two campaigns at the High Frequency Active Auroral Research Program facility (HAARP) in 2011 and 2012. The measurements of stimulated radio emissions (often called stimulated electromagnetic emissions or SEE) were conducted 15km from the HAARP site. The potential of Narrowband SEE (NSEE) as a new diagnostic tool to monitor artificial irregularities excited during HF-pump...
We have been conducting experiments at Arecibo, Puerto Rico and Gakona, Alaska to investigate naturally occurring and high power radio wave induced ionospheric plasma turbulence in the past two decades. Ionospheric turbulence can have a broad range of scale length from several hundred kilometers to centimeters. Zero-frequency modes associated with plasma density fluctuations (irregularities) are highly...
Radar is a data-intensive measurement technique often requiring significant processing to make full use of the received signal. However, computing capacity is limited at remote or mobile radar installations thereby limiting radar data products used for real-time decisions. We used graphics processing units (GPUs) to accelerate processing of high resolution phase-coded radar data from the Modular UHF...
We investigate high power radio wave-induced acoustic gravity waves (AGWs) at Gakona, Alaska, using High-frequency Active Aurora Research Program (HAARP) heating facility (i.e., HF heater) and extensive diagnostic instruments. This work is aimed at controlled study of space plasma turbulence, triggered by acoustic gravity waves originating from anomalous heat sources, as observed in our earlier experiments...
We have conducted several experiments to investigate the simultaneous generation of large plasma sheets and micropulsations by injected high power radio waves via thermal filamentation instabilities [Cohen et al., Phys. Scrip., 2010]. These large plasma sheets generated by HF heater have different configurations, depending upon the polarizations (i.e., O- or X-mode) of the heater waves. It is expected...
Black-pigmented bacteria (BPB) have been associated with infections of endodontic origin. The purpose of this study was to culture and identify BPB from the apical and coronal segments of infected root canals to understand better their ecological relationships. Teeth with a periapical radiolucency were extracted and immediately placed in reduced transport fluid for transport to an anaerobic chamber...
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