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Showing 1 to 20 of 32 for “"Vector potential"”.
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Magnetic vector potential based formulation and computation of nonlinear three dimensional magnetostatic fields and forces in electrical devices by finite elements
… with the three dimensional finite element vector potential method. The proximity effect, resulting from considering small or large solution volumes on the field distribution, and the calculated values of force, is examined. It is demonstrated that a large solution volume, with Dirichlet …
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Vector Potential of Two Southeastern Tick Species (Acari: Ixodidae) for a Northeastern Strain of the Lyme Disease Spirochete, <em>Borrelia burgdorferi</em> Sensu Stricto
<p>The abilities of the southeastern tick <em>Ixodes</em> <em>minor</em> Neumann and the eastern tick <em>Ixodes</em> <em>scapularis</em> Say (blacklegged tick) from the U.S., to acquire, maintain, and transmit a northeastern strain of <em>Borrelia</em> <em>burgdorferi</em> sensu stricto Johnson, …
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The high energy asymptotic distribution of the eigenvalues of the scattering matrix
… → R is a smooth short-range real-valued electric potential and<br/>A = (A1, . . . , Ad) : Rd → Rd is a smooth short-range magnetic vector-potential. Two cases are considered. The first case is where the magnetic vector-potential is non-zero. The spectral density of the associated scattering matrix …
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An analysis of lightning and the limitations it imposes on a global model of thunderstorm electricity
… in the atmosphere the contribution to E from the vector potential is ignored. This approximation is most likely to be invalidated by the electric fields associated with lightning. We calculate the electric field component due to the vector potential, and the conduction current this electric field …
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Mixed-Field Finite-Element Computations
… directly, both zero and first-order, scalar and vector bases that are used in the finite-element formulation. The direct solution method solves for both the magnetic and electric fields simultaneously. Comparisons are made with the traditionally used vector-Helmholtz equation set. The advantages …
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House Fly (Musca Domestica L.) Temporal and Spatial Immune Response to Streptococcus Pyogenes and Salmonella Typhimurium: Role of Pathogen Density in Bacterial Fate, Persistence and Transmission
… to new environments. To elucidate pathogen vector potential of house flies, this study investigated dose-dependent survivability of GFPexpressing Streptococcus pyogenes and Salmonella typhimurium SR11 within the fly alimentary canal both spatially via epifluorescence microscopy and …
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Manipulating graphene's lattice to create pseudovector potentials, discover anomalous friction, and measure strain dependent thermal conductivity
… dispersion mathematically analogous to the vector potential associated with a magnetic field. We complete the standard description of the strain-induced vector potential by explicitly including the lattice deformations and find new, leading order terms. Additionally, a strain engineered …
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Development of provably stable A-phi formulation time domain integral equations
… equations developed in terms of the magnetic vector potential (A) and electric scalar potential (Phi). The resulting equations overcome many of the limitations of traditional solvers and are ideal for coupling to quantum mechanical calculations. The main novelty of this thesis is the extension …
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Raman scattering by a molecule adsorbed at the surface of a thin metallic film
… electrons in the film are confined by infinite potential barriers at the surfaces, but are otherwise free. The resulting sinusoidal one-electron eigenfunctions are used to calculate the nonlocal conductivity tensor in the random phase approximation. Maxwell's equations are then used to detemine …
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ΠΡΟΣΔΙΟΡΙΣΜΟΣ ΗΛΕΚΤΡΟΜΑΓΝΗΤΙΚΟΥ ΠΕΔΙΟΥ ΔΙΠΟΛΙΚΗΣ ΠΗΓΗΣ ΤΥΧΟΝΤΟΣ ΠΡΟΣΑΝΑΤΟΛΙΣΜΟΥΣΕ ΣΤΡΩΜΑΤΟΠΟΙΗΜΕΝΟ ΜΕΣΟ ΜΕ ΤΕΧΝΙΚΕΣ ΤΩΝ ΜΕΘΟΔΩΝ Τ-Ω ΚΑΙ ΟΡΙΑΚΩΝ ΣΤΟΙΧΕΙΩΝ
… THE HELMHOLTZ'S EQUATIONS FOR THE ELECTRIC VECTOR POTENTIAL T AND THE MAGNETIC SCALAR POTENTIAL Ω INTO INTEGRAL ONES. FINALLY A SYSTEM OF ALGEBRAIC SIMULTANEOUS EQUATIONS IS FORMED BY THE USE OF A BOUNDARY ELEMENT TECHNIQUE. IN THIS SYSTEM THE NUMBER OF UNKNOWNS IS GREATER THAN THE NUMBER OF …
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Rough surface scattering under Gaussian beam illumination and the Kirchhoff approximation
… the surface using the Kirchhoff approximation. A vector potential approach utilizes this current to calculate the fields scattered by the surface. The analysis is carried out for the backscatter case and near-normal incidence in order to reduce the final numerical evaluation to a two-dimensional …
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Electromagnetic analysis with discrete exterior calculus
… Using DEC, we present a scalar \Phi and vector potential A based formulation with general Lorentz gauge to circumvent the low frequency breakdown for conventional E formulation. A set of decoupled boundary conditions is studied and numerically tested.
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An enhanced volume integral equation method and augmented equivalence principle algorithm for low frequency problems
… (MLFMA) is utilized to accelerate the matrix vector product process for large problems. Representative numerical results are shown to be excellent. Secondly, the present equivalence principle algorithm (EPA) is augmented by introducing charge densities as extra unknowns. This helps to separate …
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Spin-orbit or Aharonov-Casher edge states in semiconductor systems
… of edge states induced by the Aharonov-Casher vector potential or Rashba-type spin-orbit interaction using quantum transport in InGaAs/InAlAs herterostructures. The Aharonov-Casher effect is electromagnetically dual to the Aharonov-Bohm effect and is predicted to lead to edge states in a …
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Some like it cold: interactions between the northern frog biting mosquito, Culex territans (Walker 1856), and its amphibian hosts
… research centers around anthropophilic disease vector mosquitoes such as Aedes aegypti or Anopheles gambiae. However, mosquitoes can feed on, and pose a threat to, more than humans. In fact, mosquitoes can specialize in feeding on a wide variety of hosts, including ectotherms such as amphibians …
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Dose Dependent Survivability of Gfp-Expressing Escherichia Coli in the Alimentary Canal of House Flies (<i>Musca domestica L.</i>)
… and feed indiscriminately, house flies are potential vectors involved in the transmission of human bacterial diseases. The amount of bacteria flies ingest from their environment varies depending on the substrate. Likewise, flies are tolerant to particular levels of ingested bacteria. It has …
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A Study of Magnetic Helicity in Decaying and Forced 3D-MHD Turbulence
… product of the magnetic field and the magnetic vector potential. It characterizes the linkage and twists of the magnetic field lines. The inverse cascade is believed to be one of the causes of large-scale magnetic structure formation in the universe. This numerical studies is aimed at …
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Neutron Star Electromagnetic Field Structure
… star electromagnetic field is derived from the vector potential. The derived magnetic field is more complicated than just a magnetic dipole which is the most common approximation to the magnetic field. The electromagnetic field structure is derived under the Goldreich-Julian approach.</p> …
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A technique for measuring the electrical impedance of mechanical joints in electrically conductive structures
… differential equation describing the magnetic vector potential. Cylindrical symmetry is used to reduce the problem to two dimensions. An approximation allowing a mechanical joint of finite physical dimensions to be included is described. The third model is a finite difference, time domain …
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