An assessment of the role of the centrifugal acceleration mechanism
... for the transport of ionospheric ions through the Martian tail. Nilsson et al. (2006a) noted the possible role of centrifugal acceleration of ions associated with the small scale magnetic anomalies of Mars acting together with the large scale solar wind electric field. For the Earth’s magnetosphere ...
... for the transport of ionospheric ions through the Martian tail. Nilsson et al. (2006a) noted the possible role of centrifugal acceleration of ions associated with the small scale magnetic anomalies of Mars acting together with the large scale solar wind electric field. For the Earth’s magnetosphere ...
Massachusetts Tests for Educator Licensure (MTEL )
... serve no useful purpose and would actually get in the way when soldering electronic components. Rubber shoes (C) are necessary when working with high voltages, but most printed circuit boards operate at low voltages and should be completely disconnected from any power source while being soldered. An ...
... serve no useful purpose and would actually get in the way when soldering electronic components. Rubber shoes (C) are necessary when working with high voltages, but most printed circuit boards operate at low voltages and should be completely disconnected from any power source while being soldered. An ...
Differential Near Field Holography for Small Antenna Arrays by
... Figure 12 Three numerically computed spatial Fourier spectra (spectrum magnitudes) in k-space for a 4×4 array of /2 spaced patch antennas over a larger ground plane/reflector. All magnitude spectra are obtained for the co-polar electric field at the distance of /8 from the aperture plane. The obse ...
... Figure 12 Three numerically computed spatial Fourier spectra (spectrum magnitudes) in k-space for a 4×4 array of /2 spaced patch antennas over a larger ground plane/reflector. All magnitude spectra are obtained for the co-polar electric field at the distance of /8 from the aperture plane. The obse ...
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VANADIUM DIOXIDE TUNNEL JUNCTIONS AND STRUCTURAL
... The metal insulator transition in vanadium dioxide is sub 100 fs and abrupt. Vanadium dioxide has a low mobility and thus is a poor choice as a channel replacement material. However, modulation of its 0.6 eV bandgap offers a promising method to enable realization of a high speed, metal insulator tun ...
... The metal insulator transition in vanadium dioxide is sub 100 fs and abrupt. Vanadium dioxide has a low mobility and thus is a poor choice as a channel replacement material. However, modulation of its 0.6 eV bandgap offers a promising method to enable realization of a high speed, metal insulator tun ...
piezoelectric anisotropy and free energy instability in
... Firstly, it can be easily illustrated where does the interest for potassium niobate come from. Potassium niobate single crystal (the abbreviation KN will be used throughout this report) is already known as an outstanding nonlinear optic material. But, it also has advantages for use in ultrasound med ...
... Firstly, it can be easily illustrated where does the interest for potassium niobate come from. Potassium niobate single crystal (the abbreviation KN will be used throughout this report) is already known as an outstanding nonlinear optic material. But, it also has advantages for use in ultrasound med ...
An Anisotropic PML For Use With Biaxial Media
... Q = 0. As in the magnetic polarizabilities, they reach maximum value when a=b is around 0.6 [3]. We observe that aperture with floating inner conductor is more efficient than the one with grounded inner conductor as a coupling structure. IV. CONCLUSION The potential distribution of the annular apert ...
... Q = 0. As in the magnetic polarizabilities, they reach maximum value when a=b is around 0.6 [3]. We observe that aperture with floating inner conductor is more efficient than the one with grounded inner conductor as a coupling structure. IV. CONCLUSION The potential distribution of the annular apert ...
A Review of the 0.1 Reconnection Rate Problem
... is the reconnecting magnetic field strength, and he showed that δ/L ∼ 1/S 1/2 when the mechanism allowing the magnetic topology to change is a uniform resistivity, where S is the Lundquist number. The local reconnection rate, normalized to B and cA = vout , is E ′ ∼ δ/L. He originally suggested reco ...
... is the reconnecting magnetic field strength, and he showed that δ/L ∼ 1/S 1/2 when the mechanism allowing the magnetic topology to change is a uniform resistivity, where S is the Lundquist number. The local reconnection rate, normalized to B and cA = vout , is E ′ ∼ δ/L. He originally suggested reco ...
Superconductivity
Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature. It was discovered by Dutch physicist Heike Kamerlingh Onnes on April 8, 1911 in Leiden. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor as it transitions into the superconducting state. The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of perfect conductivity in classical physics.The electrical resistivity of a metallic conductor decreases gradually as temperature is lowered. In ordinary conductors, such as copper or silver, this decrease is limited by impurities and other defects. Even near absolute zero, a real sample of a normal conductor shows some resistance. In a superconductor, the resistance drops abruptly to zero when the material is cooled below its critical temperature. An electric current flowing through a loop of superconducting wire can persist indefinitely with no power source.In 1986, it was discovered that some cuprate-perovskite ceramic materials have a critical temperature above 90 K (−183 °C). Such a high transition temperature is theoretically impossible for a conventional superconductor, leading the materials to be termed high-temperature superconductors. Liquid nitrogen boils at 77 K, and superconduction at higher temperatures than this facilitates many experiments and applications that are less practical at lower temperatures.