Results 71 to 80 of about 112,051 (147)

Two-beam nonlinear Kerr effect to stabilize laser frequency with sub-Doppler resolution

open access: yes, 2012
Avoiding laser frequency drifts is a key issue in many atomic physics experiments. Several techniques have been developed to lock the laser frequency using sub-Doppler dispersive atomic lineshapes as error signals in a feedback loop.
Ackemann   +9 more
core   +1 more source

Influence of chirping the Raman lasers in an atom gravimeter: phase shifts due to the Raman light shift and to the finite speed of light

open access: yes, 2015
We present here an analysis of the influence of the frequency dependence of the Raman laser light shifts on the phase of a Raman-type atom gravimeter.
Cheng, B.   +3 more
core   +2 more sources

Analysis of a single-atom dipole trap

open access: yes, 2005
We describe a simple experimental technique which allows to store a single Rubidium 87 atom in an optical dipole trap. Due to light-induced two-body collisions during the loading stage of the trap the maximum number of captured atoms is locked to one ...
Kurtsiefer, Christian   +4 more
core   +1 more source

La ecografía Doppler en la detección de invasión vesical en la placenta percreta: nuestra experiencia

open access: yesRevista Argentina de Radiología, 2014
Objetivo: Demostrar la utilidad de la ecografía Doppler en la detección de la invasión vesical en el percretismo placentario. Materiales y métodos: Se evaluó por ecografía, desde noviembre de 2011 hasta mayo de 2013, a 21 pacientes de entre 20 y 44 años ...
P. García Saraví   +5 more
doaj   +1 more source

Can Doppler or contrast-enhanced ultrasound analysis add diagnostically important information about the nature of breast lesions?

open access: yesClinics
OBJECTIVES: Despite evidence suggesting that Doppler ultrasonography can help to differentiate between benign and malignant breast lesions, it is rarely applied in clinical practice.
Daniela Stanzani   +4 more
doaj   +1 more source

Sub- and super-luminal light propagation using a Rydberg state

open access: yes, 2017
We present a theoretical study to investigate sub- and super-luminal light propagation in a rubidium atomic system consisting of a Rydberg state by using density matrix formalism.
Bharti, Vineet, Natarajan, Vasant
core   +1 more source

CT angiography and Color Doppler ultrasonography features and sensitivity in detection of carotid arteries diseases

open access: yesJournal of Health Sciences, 2013
Introduction: The aim of this research was to compare specifi city and sensitivity of Color Doppler ultrasonography with CT angiography. Methods: A total of one hundred patients suffering from carotid artery disease (n=200) were tested in this research ...
Samir Kamenjaković   +4 more
doaj   +1 more source

Rupture of uterine artery pseudoaneurysm: role of ultrasonography in postpartum hemorrhage management

open access: yesThe Pan African Medical Journal, 2016
Uterine artery pseudoaneurysm (UAP) rupture should be considered in case of late genital bleeding without obvious cause and lead to perform a sonographic examination with Doppler-scan. We report two cases of late post-partum hemorrhage from UAP diagnosed
Narjes Karmous   +4 more
doaj   +1 more source

Complex of ultrasound techniques in diagnosis of nodular thyroid pathology

open access: yesКубанский научный медицинский вестник, 2014
The objectives of this study is evaluation of the role of elastography of shear wave in addition to color Doppler ultrasound in differential diagnosis of the focal thyroid pathology. For this purpose 134 patients with different nodal pathology of thyroid
A. V. Pomortsev   +3 more
doaj  

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