Results 301 to 310 of about 182,344 (339)
Some of the next articles are maybe not open access.
Solar magnetic fields and convection
Astrophysics and Space Science, 1977The solar magnetic fields observed in active regions and their residues are thought to be parts of toroidal field systems renewed every 11-yr cycle from a poloidal field. The latter may be either a reversing (dynamo) field or a non-reversing, primordial field.
openaire +1 more source
Generation of Solar Magnetic Fields I
1983In this lecture we continue our discussion concerning the generation of magnetic fields from the motion of conducting fluids. We proposed the “short sudden” idealization, which led to equation (17) in the preceding lecture. Vj in that equation is the large scale, steady fluid velocity that continually shears the field.
openaire +1 more source
Magnetic Fields and Solar Activities
Astrophysics and Space Science, 2006We discuss the study of solar magnetic fields based on the photospheric vector magnetograms of solar active regions which were obtained at Huairou Solar Observing Station near Beijing in the period of 22nd and 23th solar cycles. The measurements of the chromospheric magnetic field and the spatial configuration of the field at the lower solar atmosphere
openaire +1 more source
Studies of solar magnetic fields
Solar Physics, 1977An estimate of the average magnetic field strength at the poles of the Sun from Mount Wilson measurements is made by comparing low latitude magnetic measurements in the same regions made near the center of the disk and near the limb. There is still some uncertainty because the orientation angle of the field lines in the meridional plane is unknown, but
openaire +1 more source
Measurement of solar magnetic fields
Annual Meeting Optical Society of America, 1988We review the use of polarimetric techniques in measurements of the magnetic field in the sun’s atmosphere. The basic principles of the inverse Zeeman effect and the radiative transfer of polarized light are presented to demonstrate how the vector magnetic field on the sun can be determined in magnitude and direction from measurements of the Stokes ...
openaire +1 more source
Molecular imaging in oncology: Current impact and future directions
Ca-A Cancer Journal for Clinicians, 2022Steven P Rowe, Martin G Pomper
exaly
Management of glioblastoma: State of the art and future directions
Ca-A Cancer Journal for Clinicians, 2020Aaron Tan, David M Ashley, Giselle Lopez
exaly
Observing the Solar Magnetic Field
2000Problems of “weak” magnetic fields diagnostics in the upper solar atmosphere are discussed, where the Zeeman splitting is 3-4 orders of magnitude less than the line width. This corresponds to magnetic observations of chromosphere, prominences and the corona requiring more advanced technique as compared with the photosphere.
openaire +1 more source