Results 81 to 90 of about 1,587,723 (333)
Anti-solar differential rotation on the active sub-giant HU Virginis
, 2016 Measuring surface differential rotation (DR) on different types of stars is important when characterizing the underlying stellar dynamo. It has been suggested that anti-solar DR laws can occur when strong meridional flows exist. We aim to investigate the
Carroll, T. A. +4 more
core +1 more source
Deep Learning Methods for Assessing Time‐Variant Nonlinear Signatures in Clutter Echoes
Advanced Intelligent Systems, EarlyView.Motion classification from biosonar echoes in clutter presents a fundamental challenge: extracting structured information from stochastic interference. Deep learning successfully discriminates object speed and direction from bat‐inspired signals, achieving 97% accuracy with frequency‐modulated calls but only 48% with constant‐frequency tones. This work
Ibrahim Eshera +2 more
wiley +1 more source
Two-photon transitions driven by a combination of diode and femtosecond lasers
, 2012 We report on the combined action of a cw diode laser and a train of ultrashort pulses when each of them drives one step of the 5S-5P-5D two-photon transition in rubidium vapor.
Aumiler +11 more
core +1 more source
Animal Models and Experimental Medicine, EarlyView.This study investigated the impact of age and sex on cardiac phenotypes in healthy adult C57BL/6J mice using echocardiography and histopathological analyses. Findings revealed that female mice demonstrated more pronounced global cardiac chamber dilation during aging.
Shuang Wen +6 more
wiley +1 more source
مجله كليه طب الكندي, 2011 Background: The incidence of maternal mortality in placenta previa accrete is 7%,and its preoperative diagnosis is of a great value. Objective: to evaluate the efficacy of transabdominal color Doppler ultrasound in diagnosing placenta previa accreta and
Jwan N. Sulaiman
doaj
Ecografia Doppler a côres. Aplicações Clínicas.
Acta Médica Portuguesa, 1996 The enormous success of Ultrasound is derived from its good spatial resolution and diagnostic accuracy. The most recent and most important application of Ultrasound is Color Doppler.
L Castelo, M Reis, R Aguiar
doaj +1 more source
Localization Accuracy of Ultrasound-Actuated Needle with Color Doppler Imaging
Diagnostics, 2020 An ultrasonic needle-actuating device for tissue biopsy and regional anaesthesia offers enhanced needle visibility with color Doppler imaging. However, its specific performance is not yet fully determined.
Tingyi Jiang +7 more
doaj +1 more source
Optical and Gamma-Ray Variability Behaviors of 3C 454.3 from 2006 to 2011
, 2018 We present our photometric monitoring of a flat spectrum radio quasar (FSRQ) 3C 454.3 at Yunnan observatories from 2006 to 2011. We find that the optical color of 3C 454.3 shows obvious redder-when-brighter trend, which reaches a saturation stage when ...
Bai, Jin-Ming +10 more
core +1 more source
The characteristics of collagen‐induced rheumatoid arthritis in macaques and the changes of heart
Animal Models and Experimental Medicine, EarlyView.The disease progression in CIA macaques was categorized into three stages: IIR (days 14–34): The indicators related to rheumatoid arthritis and the levels of immunoglobulin were all elevated. There was a small amount of joint effusion, edema and mild synovial hyperplasia. No joint swelling was observed by naked eye.
Lei Zhang +8 more
wiley +1 more source
Doppler evaluation of endometrial polyps
The Egyptian Journal of Radiology and Nuclear Medicine, 2018 Introduction: Endometrial polyps are a common cause of abnormal uterine bleeding. Ultrasound is the most accepted investigation to evaluate them. However, the diagnosis can be difficult and even missed on transabdominal and grayscale imaging.
Saika Amreen +4 more
doaj +1 more source