Revealing the information between similar patterns of brain for a real motor task and its imaginary equivalent can be means to clarify movement intentions help improve Brain Computer Interfaces (BCI)s. This paper uses spectral coherence assess functional interactions neural regions engaged in an imagined arm task. Magnitude squared values were calculated two specific bands Electroencephalogram ...

Quaterns are introduced as a new measure of rotation. Rotation in quaterns has an advantage that only simple algebra is required to convert back and forth between rectangular polar coordinates use the angle measure. All analogue trigonometric functions also become algebraic when angles expressed quaterns. This paper will show how quatern can be easily used approximate first quadrant without rec...

We give an overview of recent theoretical studies of the dynamics of one- and two-dimensional spatial dissipative solitons in models based on the complex Ginzburg-Landau equations with the cubic-quintic combination of loss and gain terms, which include imaginary, real or complex spatially periodic potentials. The imaginary potential represents periodic modulation of the local loss and gain. It ...

Strontium sodium niobate ceramics are prepared by solid state reaction method. The crystal structures of these ceramics are studied by X-ray powder diffraction method. These materials are found to crystallize in the tetragonal tungsten bronze type structure and the unit cell parameters are calculated. The microstructural features were studied using scanning electron microscope. The real and ima...

The aging behavior is investigated for thin films of atactic polystyrene through measurements of complex electric capacitance. During isothermal aging process the real part of the electric capacitance increases with aging time, while the imaginary part decreases with aging time. This result suggests that the aging time dependence of the real and imaginary parts are mainly associated with change...

The gravity effects in high-energy scattering, described by a fourdimensional eikonal amplitude related to gravireggeons induced by compact extra dimensions are studied. It is demonstrated that the real part of the eikonal (with a massless mode subtracted) dominates its imaginary part at both small and large impact parameters, in contrast to the usual case of hadronic high-energy behavior. The ...

We solve an extremal problem that arises in the study of the refractive indices of passive metamaterials. The problem concerns Hermitian functions in H of the upper half-plane, i.e., H functions satisfying f(−x) = f(x). An additional requirement is that the imaginary part of f be nonnegative for nonnegative arguments. We parameterize the class of such functions whose real part is constant on an...