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22 de sept. de 2024 · This is a very short article which aims to introduce the reader to concepts such as sampling rates and aliasing. The presence of aliasing or low-pass filtering can often be evident when testing GPS loggers. This article provides some basic background information.
Hace 2 días · This article reviews the role of US imaging in the evaluation of suspected renal and ureteral disorders with emphasis on key sonographic features, utility of Doppler, and advanced techniques such as microflow imaging and CEUS.
2 de oct. de 2024 · Doppler ultrasonography, also known as Doppler ultrasound, works by using high-frequency sound waves to create images and measure blood flow. The ultrasound probe, a handheld device, is placed on the skin and sends out sound waves that pass through the body.
26 de sept. de 2024 · Doppler effect, the apparent difference between the frequency at which sound or light waves leave a source and that at which they reach an observer, caused by relative motion of the observer and the wave source. It was first described (1842) by the Austrian physicist Christian Doppler.
Hace 4 días · Weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a type of radar used to locate precipitation, calculate its motion, and estimate its type (rain, snow, hail etc.).
13 de sept. de 2024 · El ecodoppler cardiaco color es un tipo de ecografía que emplea una computadora para convertir las ondas sonoras en diferentes colores, mismos que muestran la velocidad y dirección de la sangre en tiempo real.
Hace 2 días · This phenomenon mimics the effect of evolution bias, and we refer to it as the Doppler bias, $b_D$. The Doppler bias is of comparable size to the evolution bias at $0.8 < z < 1$, where it is largest. This enhances the ELG-LRG (Luminous Red Galaxy) cross-correlation dipole by 15-30%.
