Studies of duodenal digesta flow were made in sheep implanted with an electromagnetic flowmeter probe on the ascending and transverse duodenum and in sheep equipped in the ascending duodenum with a 'Y'-type or 'Ash'-type reentrant cannula or with a 'special simple' cannula. The flow of digesta was recorded between one week and 5 months after surgery. Patterns of the digesta flow through the ind...

High-voltage direct current (HVDC) lines with line-commutated converter (LCC) are being increasingly employed to transmit bulk wind power over long distance. However, this may cause the sub-synchronous torsional interaction (SSTI) between the wind farms and the LCC-HVDC system. The SSTI characteristics of wind farms with fixed-speed induction generator (FSIG) wind turbines connected to LCC-HVDC...

This paper presents a new electromagnetic (EM) design methodology which combines two powerful techniques in a coherent strategy: space mapping (SM) and decomposition. An accurate but computationally intensive fine-resolution EM model is used sparingly only to calibrate a less accurate, but computationally much more efficient “coarse model.” Applying this new approach to interdigital filter desi...

Electromagnetic processes in inhomogeneous conductors are here described by coupling the Maxwell equations with nonlinear constitutive relations of the form B = B H x and J = J E H x , neglecting hysteresis and displacement currents. The latter equality may also account for the Hall effect. A doubly-nonlinear parabolic-hyperbolic equation is formulated, and existence of a solution is proved via...

The electric and magnetic properties of matter are of great interest for materials science and their use in electronic applications. Large dielectric and magnetoelectric responses of materials at room temperature are a great advantage for electromagnetic device applications. Here we present a study of FeCo-MgF nanogranular films exhibiting giant dielectric and magnetoelectric responses at room ...

A self-consistent theoretical treatment of a triple-well atomtronic transistor circuit reveals the mechanism gain, conditions oscillation, and properties subsequent coherent matter waves emitted by circuit. Bose-condensed reservoir atoms in large source well provides chemical potential that drives dynamics. The theory is based on ansatz condensate arises gate as displaced ground state, is, one ...

A single-finger physical model of 180 nm gatelength and 75 μm gate-width AlGaN/GaN HEMTs is described including lateral structure and vertical material parameters. The Farahmand Modified Caughey Thomas fitting function and the Monte Carlo model are used to express the 2DEG mobility in low and high field respectively. Then DC characteristics is simulated and the initial condition generated by se...

This article deals with the issue of reduction oscillation electromagnetic torque in case a direct on line (DOL) starting 6 kV induction motor. Such engines are used drive systems where frequent may be required. Direct such reduce mechanical and thermal durability. Therefore, presents method DOL motor use vacuum circuit-breakers appropriate switching voltages supplying electric machine. To conf...

A novel unified Hamiltonian approach is proposed to solve Maxwell–Schrödinger equation for modeling the interaction between classical electromagnetic (EM) fields and particles. Based on the Hamiltonian of electromagnetics and quantum mechanics, a unified Maxwell–Schrödinger system is derived by the variational principle. The coupled system is well-posed and symplectic, which ensures energy cons...

We study the optical plasmonic properties of metal surfaces which have a periodic lattice of voids buried immediately beneath their flat upper surface. Light reflection spectra calculated in the framework of a self-consistent electromagnetic multiple-scattering layer-KKR approach exhibit two types of plasmon resonances originating from the excitation of different plasmon modes: surface plasmon-...