Results 71 to 80 of about 1,485 (143)

Effect of Polarimetric Noise on the Estimation of Twist and Magnetic Energy of Force-Free Fields

, 2009
The force-free parameter $\alpha$, also known as helicity parameter or twist parameter, bears the same sign as the magnetic helicity under some restrictive conditions.
Ai, Arnaud, Bao, Burnette, Chandrasekhar, Hagino, Hagino, Jayant Joshi, Jones, Keller, Lites, Longcope, Low, Low, Makita, Martin, Martin, P. Venkatakrishnan, Parker, Pevtsov, Pevtsov, Pevtsov, Pevtsov, Rachkowsky, Rust, S'anchez Almeida, Sakurai, Sanjay Gosain, Sanjiv Kumar Tiwari, Sankarasubramanian, Socas-Navarro, Solanki, Staude, Stenflo, Stepanov, Unno   +35 more
core   +1 more source

The influence of earth tides on earth's coordinates [PDF]

The importance of the Earth's tides on Earth coordinates were examined for the following reasons: (1) the precision for obtaining the Earth's coordinates shows that the effects of Earth tides appear on the values obtained for the coordinates; (2) the ...
Vincente, R. O.
core   +1 more source

Statistical study of free magnetic energy and flare productivity of solar active regions

, 2014
Photospheric vector magnetograms from Helioseismic and Magnetic Imager on board the Solar Dynamic Observatory are utilized as the boundary conditions to extrapolate both non-linear force-free and potential magnetic fields in solar corona.
Jing, J., Su, J. T., Wang, H. M., Wang, S., Wiegelmann, T.   +4 more
core   +1 more source

Nonlinear force-free modeling of the solar coronal magnetic field

, 2008
The coronal magnetic field is an important quantity because the magnetic field dominates the structure of the solar corona. Unfortunately direct measurements of coronal magnetic fields are usually not available.
Alissandrakis, Aly, Aly, Aly, Amari, Amari, Amari, Aschwanden, Aschwanden, Aschwanden, Bineau, Bleybel, Borrero, Bossavit, Boulmezaoud, Carcedo, Chiu, Chodura, Cuperman, Cuperman, Dedner, Demoulin, Gary, Gary, He, Henney, Inhester, Jiao, Judge, Kageyama, Keppens, Klimchuk, Kramar, Kramar, LaBonte, Lagg, Leka, Li, Lin, Liu, Low, McClymont, Metcalf, Metcalf, Metcalf, Metcalf, Mickey, Mikic, Mikic, Molodensky, Molodensky, Nakagawa, Nakagawa, Pevtsov, Press, Priest, Priest, Priest, Priest, Roumeliotis, Régnier, Régnier, Régnier, Régnier, Sakurai, Sakurai, Sakurai, Sakurai, Schatten, Schmidt, Schrijver, Schrijver, Schrijver, Schrijver, Seehafer, Seehafer, Semel, Semel, Shimizu, Solanki, Song, T. Wiegelmann, Titov, Török, Valori, van Ballegooijen, van Ballegooijen, Wang, Wheatland, Wheatland, Wheatland, Wheatland, Wiegelmann, Wiegelmann, Wiegelmann, Wiegelmann, Wiegelmann, Wiegelmann, Wiegelmann, Wiegelmann, Wiegelmann, Wiegelmann, Wu, Wu, Wu, Yan, Yan, Yan, Yan, Yang, Yee   +110 more
core   +1 more source

A Challenging Solar Eruptive Event of 18 November 2003 and the Causes of the 20 November Geomagnetic Superstorm. I. Unusual History of an Eruptive Filament

, 2013
This is the first of four companion papers, which analyze a complex eruptive event of 18 November 2003 in AR 10501 and the causes of the largest Solar Cycle 23 geomagnetic storm on 20 November 2003. Analysis of a complete data set, not considered before,
Chertok, I. M., Filippov, B. P., Grechnev, V. V., Rudenko, G. V., Slemzin, V. A., Temmer, M., Uralov, A. M.   +6 more
core   +1 more source

Tidal Love numbers of membrane worlds: Europa, Titan, and Co

, 2015
Under tidal forcing, icy satellites with subsurface oceans deform as if the surface were a membrane stretched around a fluid layer. `Membrane worlds' is thus a fitting name for these bodies and membrane theory provides the perfect toolbox to predict ...
Beuthe, Mikael
core   +1 more source

Dimensioning Method of Floating Offshore Objects by Means of Quasi-Similarity Transformation with Reduced Tolerance Errors. [PDF]

Sensors (Basel), 2020
Stępień G, Tomczak A, Loosaar M, Ziębka T.   +3 more
europepmc   +1 more source

The Stokes problem for the ellipsoid using ellipsoidal kernels [PDF]

A brief review of Stokes' problem for the ellipsoid as a reference surface is given. Another solution of the problem using an ellipsoidal kernel, which represents an iterative form of Stokes' integral, is suggested with a relative error of the order of ...
Zhu, Z.
core   +1 more source

Spectral methods for the numerical solution of Molodensky's problem

, 1987
Bibliography: p. 98-107.
openaire   +2 more sources

Downward continuation of the free-air gravity anomalies to the ellipsoid using the gradient solution and terrain correction: An attempt of global numerical computations [PDF]

The formulas for the determination of the coefficients of the spherical harmonic expansion of the disturbing potential of the earth are defined for data given on a sphere.
Wang, Y. M.
core   +1 more source