The aim of this study was to investigate the mechanisms by which the radiated radiofrequency (RF) GSM (global system for mobile communication) signal may affect pacemaker (PM) function. We measured the signal at the output of the sensing amplifier of PMs with various configurations of low-pass filte …

Radiofrequency has established itself as a useful technique for managing cardiac arrhythmias and treating soft tissue tumors. However, despite its pervasive use, many of the biophysical principals needed to fully understand and optimize the radiofrequency ablation technique have not been explored. W …

A patient monitoring system for continuous real-time monitoring of left ventricular (LV) function in the postoperative setting was developed. Common hemodynamic parameters and LV functional indices are all calculated from left ventricular pressure-volume loops (PV-loops). Visualization of the PV-loo …

We confirmed the spatial distribution of the SAR and corresponding current density possessed sharp peaks and were highly localized around the leads' electrodes. Scans with a resolution of 1 mm or less are required in the area of peak SAR in order to capture the peak's value.

Both forward and phase-mode gating are suitable for real-time hemodynamic measurements by nonimaging techniques. The small statistical difference between the methods is not clinically significant. The true shape of the time-activity curve is maintained most accurately by phase-mode gating.

Both radio-frequency (rf) and envelope-detected signal analyses have lead to successful tissue discrimination in medical ultrasound. The extrapolation from tissue discrimination to a description of the tissue structure requires an analysis of the statistics of complex signals. To that end, first- an …

Second order statistics have been derived for the speckle in diagnostic ultrasound that arises from diffuse (incoherent) scattering in the presence of distributed and organized specular (coherent) scattering. They serve as the basis for a three-dimensional feature space in which tissue textures can …

The ideal observer signal to noise ratio (snr) has been derived from statistical decision theory for all of the major medical imaging modalities. This snr provides an absolute scale for image system performance assessment and leads to instrumentation design goals and constraints for imaging system o …

(May 2, 2023) The Defense Advanced Research Projects Agency (DARPA) Information Innovation Office (I2O) is sponsoring a Proposers Day to provide information to potential proposers on the objectives of the ...

The ideal observer signal-to-noise ratio has been derived from statistical decision theory for all of the major medical imaging modalities. This yields an absolute scale for image performance assessment and instrumentation design and optimization. Applications include: the functional dependence of d …

A multi-institution research team led by the University of Pittsburgh secured a $22 million grant from the Defense Advanced Research Projects Agency (DARPA) to develop a device combining artificial intelligence, bioelectronics and regenerative medicine to regrow muscle tissue, especially after combat injuries. McGowan Institute for Regenerative Medicine affiliated

Defense Advanced Research Projects Agency Program Detail

Defense Advanced Research Projects Agency Program Detail

Defense Advanced Research Projects Agency Program Detail

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Information about Cathinone including basics, effects, dosage, history, legal status, photos, research, media coverage, and links to other resources.

Rutgers scientists discover way to reduce animal feed and food production costs by increasing a key nutrient in corn.

Frequently Asked Questions about methcathinone.

Information about Ethylcathinone including basics, effects, dosage, history, legal status, photos, research, media coverage, and links to other resources.

Information about Khat (Catha edulis) including basics, effects, dosage, history, legal status, photos, research, media coverage, and links to other resources.

Information about Caffeine including basics, effects, dosage, history, legal status, photos, research, media coverage, and links to other resources.

Charting the Relatively Unknown: A Study of Four Cathinones, by Fridjof Waleenstedt with Knut Bbjornstrand.

an alkaloid discovered twenty years ago in the leaves of the khat bush