Results 111 to 120 of about 64,303 (305)

NIR/VIS Dual‐Comb Spectroscopy Comparing High and Low Repetition Rate Regimes

open access: yesLaser &Photonics Reviews, EarlyView.
This work compares dual‐comb spectroscopy at lower and higher repetition rates, emphasizing the inherent trade‐off between spectral and temporal resolution. The 80 MHz system provides high‐resolution spectra suitable for analyzing complex molecular structures, whereas the free‐running 1 GHz platform enables fast measurements for real‐time trace gas ...
Alexander Eber   +6 more
wiley   +1 more source

Renal Arterial and Venous Doppler in Cardiorenal Syndrome: Pathophysiological and Clinical Insights

open access: yesBiomedicines
In recent decades, there has been considerable effort in investigating the clinical utility of renal Doppler measurements in both cardiovascular and renal disorders.
Roberta Barone   +5 more
doaj   +1 more source

Prediction of Severity of Coronary Stenosis in the Absence of Infarction by Tissue Doppler Imaging and Conventional Echocardiography at Rest [PDF]

open access: yesJournal of Cardiovascular and Thoracic Research, 2011
Tissue Doppler imaging (TDI) is a relatively new method that measures regional myocardial velocities on the basis of color Doppler imaging. The aim of this study was to investigate both systolic and diastolic parameters to diagnose coronary stenosis at ...
Mehrnosh Toufan   +3 more
doaj  

A Stopped‐Flow Instrument for Millisecond Timescale Reaction Monitoring on a Standard NMR Spectrometer

open access: yesMagnetic Resonance in Chemistry, EarlyView.
A new stopped‐flow instrument allows kinetic measurements of reactions 10 milliseconds after initiating them by mixing in a flow cell inserted into a standard NMR probe and spectrometer. High‐speed video, pressure and NMR line‐shape data are used to characterise mixing and stopping, and a protodeboronation reaction with a 5‐millisecond half‐life used ...
Andrew M. R. Hall   +6 more
wiley   +1 more source

Electromagnetic Pulse Scattering by a Spacecraft Nearing Light Speed

open access: yes, 2017
Humans will launch spacecraft that travel at an appreciable fraction of the speed of light. Spacecraft traffic will be tracked by radar. Scattering of pulsed electromagnetic fields by an object in uniform translational motion at relativistic speed may be
Bohren, Craig F.   +3 more
core   +1 more source

Dynamic Mode Decomposition (DMD) for Low‐Latency Real‐Time Cardiac MRI

open access: yesMagnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To demonstrate dynamic mode decomposition (DMD) for high spatiotemporal low‐latency online reconstruction in 2D real‐time cardiac MRI. Methods DMD was applied to 2D spiral balanced steady state free precession (bSSFP) real‐time adult and fetal cardiac MRI at 0.55 T, with data from 10 healthy adult volunteers (3F/7M; age: 21–49; BMI: 20–
Ecrin Yagiz   +5 more
wiley   +1 more source

Cardiac resynchronization therapy and pulmonary artery banding in advanced heart failure infants with left ventricular dilated cardiomyopathy and left bundle branch block

open access: yesPediatric Investigation, EarlyView.
The combination of cardiac resynchronization therapy and pulmonary artery banding was associated with substantial improvement in advanced heart failure infants with left ventricular dilated cardiomyopathy and left bundle branch block. Most patients exhibited marked improvement in clinical status and ventricular function, along with a reduction in QRS ...
Min Zeng   +8 more
wiley   +1 more source

The Mu-MASS (MuoniuM lAser SpectroScopy) experiment

open access: yes, 2018
We present a new experiment, Mu-MASS, aiming for a 1000-fold improvement in the determination of the 1S-2S transition frequency of Muonium (M), the positive-muon/electron bound state.
Crivelli, P.
core   +1 more source

STAR-RIS-Based Pulse-Doppler Radars

open access: yes2024 32nd European Signal Processing Conference (EUSIPCO)
Accepted at the 2024 European Signal Processing Conference, Lyon ...
Grossi, Emanuele   +2 more
openaire   +3 more sources

Evaluating the realism of double moment parameterised particle size distributions in a midlatitude frontal ice cloud with complex microphysics

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
Uncertainties in the representation of ice particle size distributions (PSDs) cause inaccuracies in parameterisations of clouds. In this study, observed PSDs from a midlatitude frontal case study are compared with gamma PSDs with the same concentration and ice water content.
Rosie M. Mammatt   +3 more
wiley   +1 more source

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