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PDF only
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... carbon nanotubes. This is a special case of the Little Effect whereby the Hedvall Effect causes carbon nanotube formation in these ferromagnetic systems. The Hedvall Effect slows and/or accelerates catalytic decomposition, transport, and precipitation processes of carbonaceous states associated wit ...
Geomagnetism and Aeronomy, 2016, Vol. 56, № 7, pp. 1
Geomagnetism and Aeronomy, 2016, Vol. 56, № 7, pp. 1

Effects of neutron-star superconductivity on
Effects of neutron-star superconductivity on

Evolution of magnetic helicity in the course of kinetic magnetic
Evolution of magnetic helicity in the course of kinetic magnetic

DISCOVERING AND ANALYZING MAGNETIC FIELDS
DISCOVERING AND ANALYZING MAGNETIC FIELDS

... roughly $10 for a class of 25 students (see product list). Many of these materials were able to be recycled for future classes. Constructing the solenoids was quite straightforward. When I began the experiment, I made sure that both ends of the copper wire were stripped. I then asked my students to ...
CLUSTER MAGNETIC FIELDS - NED
CLUSTER MAGNETIC FIELDS - NED

... between the existence of a cluster radio halo and the existence of substructure in X-ray images of the hot cluster atmosphere, indicative of merging clusters, and a corresponding anticorrelation between cluster radio halos and clusters with relaxed morphologies, e.g., cooling flows (Govoni et al. 20 ...
Lecture Notes and Essays in Astrophysics VOLUME III
Lecture Notes and Essays in Astrophysics VOLUME III

electromagnetic induction
electromagnetic induction

MAGNETS
MAGNETS

... A: The geographical poles represent the ends of the vertical axis around which the planet rotates. The magnetic poles are the ends of the vertical axis through Earth’s magnetic field. Earth’s geographical poles do not change much, but its magnetic poles are constantly on the move. (In fact, Earth’s ...
Analytical estimates of the resistivity due to ion
Analytical estimates of the resistivity due to ion

DISCOVERING AND ANALYZING MAGNETIC FIELDS
DISCOVERING AND ANALYZING MAGNETIC FIELDS

(2004) - H. Peter
(2004) - H. Peter

... higher “filling-factor” than Sun?  not enough space on the surface  and: also stellar X-rays are structured stellar corona are not only brighter, they have also  high densities  high temperatures ...
- UCL Discovery
- UCL Discovery

Statistical survey of widely spread out solar electron events
Statistical survey of widely spread out solar electron events

P3 10 Motor Effect
P3 10 Motor Effect

... The coil ................................... the iron bolt which moves ............................ ...
MEASUREMENT OF MAGNETIC FIELD ALONG THE AXIS OF A
MEASUREMENT OF MAGNETIC FIELD ALONG THE AXIS OF A

... field along the axis of a circular coil. It consists of a coil with specified number turns of copper wire and a compass that can be moved along the axis of the coil. This simple apparatus is still in use in most physics labs. The problem with this apparatus is, however, poor quality of the magnetic ...
The Solar System and Beyond
The Solar System and Beyond

slides - 24th ICNTS
slides - 24th ICNTS

...  The plastic sheet is placed on top of ...
Current status of turbulent dynamo theory
Current status of turbulent dynamo theory

Chapter 15--Our Sun - Geological Sciences
Chapter 15--Our Sun - Geological Sciences

... output reaches Earth, with the rest dispersing in all directions into space. Most of this energy is radiated in the form of visible light, but once you leave the protective blanket of Earth’s atmosphere you’ll encounter significant amounts of other types of solar radiation, including dangerous ultra ...
Exospheres and Atmospheric Escape
Exospheres and Atmospheric Escape

Ąh = §.Φ© , - Solar Physics Group
Ąh = §.Φ© , - Solar Physics Group

... mechanism for coronal heating by Parker (1972), in what amounted to the first DC heating model. According to his theory of topological dissipation, almost any motion of the photospheric surface would tend to generate topological discontinuities in the coronal field. The efficacy of such discontinuit ...
Nonlinear shear-current dynamo and magnetic helicity transport in
Nonlinear shear-current dynamo and magnetic helicity transport in

Shielding of electromagnetic fields by mono- and multi
Shielding of electromagnetic fields by mono- and multi

15 Electricity and Magnetism
15 Electricity and Magnetism

... Directions: On the line before each definition, write the letter of the term that matches it correctly. Each term is used only once. ...
< 1 2 3 4 5 6 7 8 ... 107 >

Aurora



An aurora is a natural light display in the sky, predominantly seen in the high latitude (Arctic and Antarctic) regions. Auroras are produced when the magnetosphere is sufficiently disturbed by the solar wind that the trajectories of charged particles in both solar wind and magnetospheric plasma, mainly in the form of electrons and protons, precipitate them into the upper atmosphere (thermosphere/exosphere), where their energy is lost. The resulting ionization and excitation of atmospheric constituents emits light of varying colour and complexity. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceleration imparted to the precipitating particles. Precipitating protons generally produce optical emissions as incident hydrogen atoms after gaining electrons from the atmosphere. Proton auroras are usually observed at lower latitudes. Different aspects of an aurora are elaborated in various sections below.
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