11051855-c-E-51.pdf
... recording medium with thickness δ. From (51.4) and (51.5) it is seen that for reduced transition length (and hence higher linear density) it is necessary to increase the coercive field (Hc ) of the recording medium but to do so requires a concomitant increase in the magnetization of the write head ( ...
... recording medium with thickness δ. From (51.4) and (51.5) it is seen that for reduced transition length (and hence higher linear density) it is necessary to increase the coercive field (Hc ) of the recording medium but to do so requires a concomitant increase in the magnetization of the write head ( ...
Physics Laboratory Manual for Engineering Undergraduates
... It is impossible to do an experimental measurement with perfect accuracy. There is always an uncertainty associated with any measured quantity in an experiment even in the most carefully done experiment and despite using the most sophisticated instruments. This uncertainty in the measured value is k ...
... It is impossible to do an experimental measurement with perfect accuracy. There is always an uncertainty associated with any measured quantity in an experiment even in the most carefully done experiment and despite using the most sophisticated instruments. This uncertainty in the measured value is k ...
Analysis of eddy-current interaction with a surface
... crack in a half-space conductor and a normally incident, uniform electric field is examined. This problem is a special case of the more general problem of a conducting cylinder containing a radial surface-breaking crack of constant depth. The more general problem was solved in 1979r in terms of an i ...
... crack in a half-space conductor and a normally incident, uniform electric field is examined. This problem is a special case of the more general problem of a conducting cylinder containing a radial surface-breaking crack of constant depth. The more general problem was solved in 1979r in terms of an i ...
Article - HAL
... spin-orbit interaction, which can be written as A(LS), the constant A depending on the electron state in an atom. This interaction results in splitting of atomic levels (the fine structure), which strongly increases for heavy atoms (large Z). The reason is that there is a certain probability for the ...
... spin-orbit interaction, which can be written as A(LS), the constant A depending on the electron state in an atom. This interaction results in splitting of atomic levels (the fine structure), which strongly increases for heavy atoms (large Z). The reason is that there is a certain probability for the ...
LaBonte`s method revisited: An effective steepest
... Energy application and the quest for rare-earth free or rareearth reduced permanent magnets8,16 renewed the interest in micromagnetics of permanent magnets.15 Most state-of-the-art micromagnetic solvers integrate the Landau-Lifshitz Gilbert (LLG) equation of motion in time. However, the accessible t ...
... Energy application and the quest for rare-earth free or rareearth reduced permanent magnets8,16 renewed the interest in micromagnetics of permanent magnets.15 Most state-of-the-art micromagnetic solvers integrate the Landau-Lifshitz Gilbert (LLG) equation of motion in time. However, the accessible t ...
A Central Engine for Cosmic Gamma
... If such neutron stars are to be candidates for GRB source CE’s, their formation rate > 10−6 yr−1 -galaxy−1 . Type Ia supernovae are observed to occur at a rate must be ∼ 2 × 10−3 yr−1 -galaxy−1 . A plausible guess for the fraction of B ≈ 106 G exploding WDs among them ≈ 2 × 10−2 , if this fraction i ...
... If such neutron stars are to be candidates for GRB source CE’s, their formation rate > 10−6 yr−1 -galaxy−1 . Type Ia supernovae are observed to occur at a rate must be ∼ 2 × 10−3 yr−1 -galaxy−1 . A plausible guess for the fraction of B ≈ 106 G exploding WDs among them ≈ 2 × 10−2 , if this fraction i ...
Torque coils 8-2-01
... This test is carried out to verify the performance of each of the spacecraft’s three torque coils. The main concern in the proper functioning of a coil is that the wire remains intact. Any break in the wire will interrupt the current path and render the coil useless. The extra insulation around the ...
... This test is carried out to verify the performance of each of the spacecraft’s three torque coils. The main concern in the proper functioning of a coil is that the wire remains intact. Any break in the wire will interrupt the current path and render the coil useless. The extra insulation around the ...
Zonal Flows and Fields Generated by Turbulence in CHS
... produce a structure. For example, it is well known that the Rossby wave turbulence should generate the Jovian belt or zonal flows [1], and that turbulence should be the cause for the geomagnetic (dipole) field. In 1970s, it was pointed out that the drift wave turbulence should obey the same equation ...
... produce a structure. For example, it is well known that the Rossby wave turbulence should generate the Jovian belt or zonal flows [1], and that turbulence should be the cause for the geomagnetic (dipole) field. In 1970s, it was pointed out that the drift wave turbulence should obey the same equation ...
Electromagnet
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel.