The dynamic instability regions of composite laminated skew flat plates subjected to uniform in-plane axial end-loading are investigated. The in-plane loading is assumed as a combination of a time-invariant component and a harmonic time-varying component uniformly distributed along two opposite panel ends’ width. In case of some loading frequency-amplitude pair-conditions, the model is subjecte...

A closed-loop MIMO-OFDM transmitter can exploit channel knowledge using eigenbeamforming to create MN parallel channels, where M is the number of antennas at both ends and N is the number of OFDM tones. We find that the penalty due to a flat-frequency constraint, which forces each tone to convey the same amount of information, becomes negligible as M grows. We propose low-complexity bit-allocat...

By a combination of analytical and numerical techniques, we demonstrate the existence of spherical, asymptotically flat traversable wormholes supported by exotic matter whose stress tensor relative to the orthonormal frame of Killing observers takes the form of a perfect fluid possessing anisotropic pressures and subject to linear equations of state: τ = λρc, P = μρc. We show that there exists ...

We express any Courant algebroid bracket by means of a metric connection, and construct a Courant algebroid structure on any orthogonal, Whitney sum E⊕C where E is a given Courant algebroid and C is a flat, pseudo-Euclidean vector bundle. Then, we establish the general expression of the bracket of a transitive Courant algebroid, that is, a Courant algebroid with a surjective anchor, and describ...

A methodology is presented to enable the usage of a digital tester for an accurate detection of open circuits as well as short circuits in test structures to control backend process steps. Therefore, a novel graph model will be introduced to calculate the resistance values of test structures containing defects. The paper gives a comprehensive description of the procedure to adjust the tester pa...

Osteochondromas are overgrowing or bone projection covered by cartilage which appears most commonly in the metaphysis of long bones, but also have been reported on the diaphysis, in flat bones and in vertebrae [1], grow during childhood through adolescence, but usually growing ends when the epiphyseal plates close.If the growth happen in adulthood suggests the diagnosis of malignant transformat...

Transmitt,er optimization techniques for maximizing the throughput of linear IS1 channels impaired by additive-Gaussian noise and crosstalk are presented. Transmitter ends of both single carrier and multicarrier transceiver structures are optimized subject to a fixed average input energy constraint. The effect of transmitter optimization on channel throughput is quantified by comparison with sc...

A new class of time-symmetric solutions to the initial value constraints of vacuum General Relativity is introduced. These data are globally regular, asymptotically flat (with possibly several asymptotic ends) and in general have no isometries, but a U(1) × U(1) group of conformal isometries. After decomposing the Lichnerowicz conformal factor in a double Fourier series on the group orbits, the...

On any given compact manifold M with boundary ∂M , it is proved that the moduli space E of Einstein metrics on M is a smooth, infinite dimensional Banach manifold. The Dirichlet and Neumann boundary maps to data on ∂M are smooth Fredholm maps of index 0. These results also hold for manifolds with compact boundary which have a finite number of locally asymtotically flat ends, as well as for the ...

A method for mapping known cylindrical magnetovac solutions to solutions in torus coordinates is developed. Identification of the cylinder ends changes topology from R1 × S1 to S1 × S1. An analytic Einstein–Maxwell solution for a toroidal magnetic field in tori is presented. The toroidal interior is matched to an asymptotically flat vacuum exterior, connected by an Israel boundary layer. PACS n...