Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"dipole model"”.
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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
… in wireless platform design. The accurate noise model of integrated circuits (ICs) is needed to help designers to diagnose and predict RFI problems. In this dissertation, an improved IC radiated emission model based on near-field measurements is proposed. The regularization technique and the …
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Magnetic Stabilization of Nadir-Pointing Small Satellites
… control laws are tested using two magnetic field models: the tilted dipole model and the International Geomagnetic Reference Field (IGRF) model. Computer simulations are included to illustrate the effectiveness of the proposed control laws.</p>
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Plasmon Hybridization in Clusters of Metal Nanoparticles and Magnetic Nanoparticle Oligomers
… that complicated nanoparticle geometries can be modeled qualitatively as small nanoclusters of simpler shapes and that the introduction of asymmetry into a nanocluster can noticeably alter the nanocluster's plasmonic behavior. We will also study the impact of nanocluster size and shape by …
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Computer simulation of a novel technique for Radio-Frequency Ablation of ventricular arrhythmias
… utilization of the Single Equivalent Moving Dipole model and inverse problem in cardiology will prove to be efficient in localizing the exit site of the reentry circuit and guiding the ablation catheter to that localized site during the RFA procedure. In principle, our RFA technique only …
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Analytical Modeling of Waveguide-fed Metasurfaces for Microwave Imaging and Beamforming
… among others.</p><p>Yet, the common approach to model and design such metasurfaces relies on effective surface properties, a methodology that is inspired by initial metamaterial designs. This methodology is only applicable to periodic arrangements of elements, and the assumption that the …
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Using Cutting Edge Software and Techniques to Model and Measure Experimental Neutrino Data
… of electronlike events is presented. A new model called the “dipole model” is used, which is an extension of the 3+1 model. Alongside the three neutrinos in the Standard Model and a fourth, sterile neutrino participating in the oscillations, a second set of neutrinos Nj with j = 1, 2, 3 is …
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Uranus orbiter and probe mission : Project Upsilon
… method combines an orbit determination model with respect to Uranus' flattening, and a simple magnetic dipole model for field line modeling. A 7-year period is allotted for the technology research and development, and the testing and verification stages of the project life cycle; the …
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Optical Properties of Organic Semiconductors: from Submonolayers to Crystalline Films
… a Kramers-Kronig consistency and no specific model is needed to express the spectral behavior of the optical constants. Based on our method, we have successfully calculated the optical constants, and therefore the absorption behavior, of films of different thickness of PTCDA on mica, glass, …
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Classification, identification, and modeling of unexploded ordnance in realistic environments
… To perform such discrimination, accurate forward models of buried UXO are needed. This thesis provides a survey of existing target models: the dipole model, the spheroid model, and the fundamental mode model. Then the implementation of a new model, the spheroidal mode model, is described and …
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Interpretation of Infrared and Raman Spectra Using Driven Molecular Dynamics Method
… ofthe complexes. Various polarizability models are tested for the methane molecule as cheaper and more accurate alternatives to the Applequist’s point dipole model. The Thole linear model showed a good correlation to the non-linear model in a non-linear parameter space used to calculate …
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Magnetic and Mechanical Properties of Ultrasoft Magnetorheological Elastomers
… of magnetometry measurements and computational modeling. The magnetic hysteresis loops of the softer MREs exhibit a characteristic pinched loop shape with almost zero remanence and loop widening at intermediate fields that monotonically decreases with increasing polymer stiffness. A two-dipole …
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Non-equilibrium dynamics of dipole-coupled internal states in cold gases
… in the systems studied behaving as spin$-1/2$ models with long-range interactions. We first study a closed system with both static and resonant near-field dipole interactions under an external drive. By studying the uniform mean-field dynamics of the system, we find the dynamics are given by …
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Quantifying The Properties Of Magmatic Intrusions In The Central Andes With Geodesy
… pattern between 1992 and 2014. I propose a 'dipole' model of magma transport between vertically-aligned reservoirs in the lower crust and middle crust to explain the observation of uplift and peripheral subsidence at Uturuncu. The ratio of vertical to radial surface displacements for single …
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Investigating the Modification of Spontaneous Emission using Layer-by-Layer Self-Assembly
… theoretical predictions based on a classical dipole model, which also yields consistent values for the fluorophores' intrinsic fluorescence lifetime and quantum yield near a dielectric as well as a plasmonic interface. Based on this observation, we further demonstrate that self-assembled …
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Scattering Scanning Near-Field Optical Microscopy on Anisotropic Dielectrics
… the theoretical part of the work, the analytical dipole model, which is well known for isotropic samples, is extended to anisotropic samples. On isotropic samples one observes an optical contrast between different materials, whereas on anisotropic samples one expects an additional contrast between …
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A Bayesian Approach to Spike Sorting of Neural Data via Source Localization
… are two key ideas. The first is the usage of a dipole-based generative model for recorded waveforms. This dipole approximation of a neuron, which captures the empirical falloff in signal strength with distance from the probe, allows us to estimate the position from which signals originate. This …
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An experimental study of light-material interaction at subwavelength scale
… can be represented by the electric and magnetic dipole fields which satisfy the boundary conditions at the screen. Using near-field scanning optical microscope (NSOM), I have experimentally studied light transmission through a subwavelength hole, and found an unusually large amount of phase shift …
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Magneto-mechanical systems for ultra-low frequency data transmission: Dynamics, losses, and driving mechanisms
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01