Results 291 to 300 of about 550,699 (320)
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Neutral sodium tails in comets
Advances in Space Research, 2002Abstract In the last few years, after a new type of tail composed only of neutral sodium atoms had been discovered in Comet Hale-Bopp, much attention has been given to the release and distribution of sodium in comets. It was not the first time that a sodium tail had been observed in a comet, but the amount of data collected from Comet Hale-Bopp in ...
Cremonese, G. +3 more
openaire +2 more sources
Clinical significance of the comet‐tail artifact in thyroid ultrasound
Journal of Clinical Ultrasound, 1996The comet‐tail artifact is commonly encountered in a variety of clinical conditions; however, its presence and significance in a thyroid nodule has not been documented before. We document its presence in 100 patients who underwent ultrasound examinations
A. Ahuja +3 more
semanticscholar +1 more source
Intensity Measurements on the CO + Comet Tail, and the BO α and β Molecular Band Systems
, 1960Relative band intensities of the comet tail system (A2Π-X2Σ) of CO+ and of the α(A2Π-X2Σ) and β(B2Σ-X2Σ) systems of BO have been measured photoelectrically. They have been interpreted with the aid of Franck-Condon factors qν'νdouble prime and r-centroids
D. Robinson, R. W. Nicholls
semanticscholar +1 more source
AJR. American journal of roentgenology, 2001
OBJECTIVE This study was designed to assess interobserver variability in identifying the rim and comet-tail signs and to determine the clinical utility of these signs in determining whether or not the calcifications with which they are associated ...
Amy Rochester Guest +7 more
semanticscholar +1 more source
OBJECTIVE This study was designed to assess interobserver variability in identifying the rim and comet-tail signs and to determine the clinical utility of these signs in determining whether or not the calcifications with which they are associated ...
Amy Rochester Guest +7 more
semanticscholar +1 more source
Radiology, 1990
The "comet tail" is a well-known ultrasound artifact that appears as a series of parallel bands radiating from a source. This artifact was observed in the gallbladder lumen in eight of 10 patients after extracorporeal shock wave lithotripsy of ...
R. Shapiro, F. Winsberg
semanticscholar +1 more source
The "comet tail" is a well-known ultrasound artifact that appears as a series of parallel bands radiating from a source. This artifact was observed in the gallbladder lumen in eight of 10 patients after extracorporeal shock wave lithotripsy of ...
R. Shapiro, F. Winsberg
semanticscholar +1 more source
Experimental Oscillator Strength of the Comet‐Tail System of CO+
, 1960The radiative lifetimes (τv′) of the upper electronic state of the comet‐tail bands of CO+ have been measured. There is an appreciable variation (about 50%) of τv′ with v′, the upper electronic state vibrational quantum number. By using an average τ = (2.
R. Bennett, E. W. Dalby
semanticscholar +1 more source
, 1962
Franck–Condon factor and r-centroid arrays computed to high vibrational quantum numbers for Morse potentials are displayed for the CO+ comet-tail (A2Πi–X2Σ+), first negative (B2Σ+–X2Σ+), and Baldet–Johnson (B2Σ+–A2Πi) band systems.
R. W. Nicholls
semanticscholar +1 more source
Franck–Condon factor and r-centroid arrays computed to high vibrational quantum numbers for Morse potentials are displayed for the CO+ comet-tail (A2Πi–X2Σ+), first negative (B2Σ+–X2Σ+), and Baldet–Johnson (B2Σ+–A2Πi) band systems.
R. W. Nicholls
semanticscholar +1 more source
The Comet-Tail (A(2)Pi(i)-X(2)Sigma(+)) System of (12)C(16)O(+): A Reinvestigation.
Journal of Molecular Spectroscopy, 2000The emission spectrum of the comet-tail (A(2)Pi(i)-X(2)Sigma(+)) system of (12)C(16)O(+) produced in the cathode glow of a hollow-cathode discharge tube and photographed in the spectral region 3345-8500 Å at high resolution was reinvestigated.
Haridass, Prasad, Reddy
semanticscholar +1 more source
On the classification of comet plasma tails
Solar System Research, 2017The investigation of plasma tails of comets is an important part of comet research. Different classifications of plasma tails of comets are proposed. Plasma acceleration in the tails is investigated in sufficient detail. Several cometary forms are explained. Plasma tails of Mars and Venus were observed during the first studies of these planets.
E. R. Mozhenkov, Oleg Vaisberg
openaire +2 more sources
Plasma Tail and Dust Tail of Comets
1994Generally, a comet has two tails; the blue plasma tail and the red dust tail (or Type 1 (ion) tail and Type 2 (dust) tail). The plasma tail is caused by an interaction between the solar wind and the cometary plasma, while the dust tail is by the solar radiation pressure to the cometary dust. The first purpose of the present paper is to review our works
Takao Saito +3 more
openaire +2 more sources