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Showing 1 to 11 of 11 for “"Magnetic dipoles"”.
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Studies of the magnetic dipoles of the Earth and the planets
本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである
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Source distribution analysis of magnetic microscopy maps of geological samples
… require complex inversion of maps of the magnetic field above the sample. In order to extract magnetization information from SQUID microscope measurements, it is customary to model the sample as a distribution of magnetic dipoles. The calculations required for this operation in the space …
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An Improved dipole-moment model based on near-field scanning for characterizing near-field coupling and far-field radiation from an IC
… has clear physical meaning: the electric and magnetic dipoles represent the voltage and the current in the circuit, respectively. One application of this dipole model is the prediction of heat sink radiation. In order to accurately predict the fields excited by a heat sink, an approach is …
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Analysis and Design of a Wideband Dual-Polarized Antenna Based on the Principle of Huygens' Source
… sources, which are combinations of electric and magnetic dipoles, is used. As a result a wideband unidirectional antenna, which consists of a planar dipole and a slot, is selected for the antenna element. This study aims at designing a dually polarized antenna with wideband performance. The first …
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Dynamics and control of electromagnetic satellite formations
… required for formation reconfiguration. Electromagnetic Formation Flying (EMFF) is a novel concept that uses superconducting electromagnetic coils to provide forces and torques between different satellites in a formation which enables the control of all the relative degrees of freedom. With …
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Investigation, Design and Implementation of MIMO Antennas for Mobile Phones. Simulation and Measurement of MIMO Antennas for Mobile Handsets and Investigations of Channel Capacity of the Radiating Elements Using Spatial and Polarisation Diversity Strategies.
… size reduction method is explored by applying magnetic wall concept on the symmetry reference of the antenna structure. Using this method, a triple dual-band inverted-F antenna system is presented and considered for MIMO application. Means of achieving minimum coupling between the three …
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Controlled precipitation of energetic Van Allen belt protons by electromagnetic ion cyclotron (EMIC) waves : scientific and engineering implications
… population by artificially transmitting Electromagnetic Ion Cyclotron (EMIC) waves from space-based antennas (named remediation). These waves are naturally generated by equatorial ring current ions in the outer belt region, which explains the absence of EMIC waves at lower altitudes. …
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Few- and many-body physics of dipoles in ion traps and optical lattice simulators
… This model attributes the noise to fluctuating dipoles formed by adsorbates bound on the trap surface. The second part of the thesis studies three different lattice boson systems. First, we study the Bose-Hubbard model for hard-core bosons, interacting via dipole-dipole interactions. The …
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Pressure profiles of plasmas confined in the field of a dipole magnet
… of plasma pressure confined by a strong magnetic field is a fundamental challenge in both laboratory and space plasma physics. Using magnetic and X-ray measurements on the Levitated Dipole Experiment (LDX), the equilibrium plasma pressure has been reconstructed, and variations of the …
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Moderne Festkörper-NMR an Funktionspolymeren
… For this, the direct interactions between the magnetic dipoles, that are not reduced to zero by the molecular motion of the polymer chains, were determined by the application of different techniques. This interactions, the so-called residual dipolar coupling, are a measure of the polymer …
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A Permanent Magnetic Dipole Reaction Sphere Actuator for Spacecraft Attitude Control
… axially magnetized, NdFeB (Grade 42) sphere (K&J Magnetics SX8) with a mass of 0.22 kg and a remanence of 1.22 T. The rotor can translate up to 1.0 mm from center and rotate about the 2 axes orthogonal to its magnetization axis as the coils cannot generate torque about the rotor’s magnetization …