A cylindrical hat-loaded method is employed to make monopoles behave as dual band resonators. The two frequency bands are obtained by perturbing higher propagation modes by modifying the hat length. The longer the cylindrical hat is, the lower the resonant frequencies are obtained. The hat length behaves as an inductive load, also increasing the electric length of the monopole. As a result, a c...

Design, assembly process and preparation of windings for large power transformers are complex procedures. It is very important to recognize resonant frequencies the during design phase in order avoid increase vibrations, stresses or noise levels normal operation transformer. Increased vibrations can occur when frequency excitation close natural system. In that case amplitudes will increase, the...

The most elusive experience of the human being in this huge endless universe is related to “the consciousness”, awareness what surrounding him, perceiving surroundings nature with deep interceptions and incorporating all context emotional based on memory self-identity. author defines consciousness as” state alertness aware, active vigilant self volition, personal identity. This ineffable intrin...

A method-of-moments (MoM) analysis is applied to the problem of determining late-time resonances of dielectric bodies of revolution buried in a lossy layered medium, with application to plastic-land-mine identification. To make such an analysis tractable, we have employed the method of complex images to evaluate the layered-medium Green’s function. The application of this method to resonant str...

Electronic speckle pattern interferometry (ESPI) was used for tuning and visualization of natural frequencies of a square laminate plate with rounded corners and chamfers. The plate was excited to resonant vibration by a sinusoidal acoustical source, which provided a continuous range of audio frequencies. Numerical calculations of resonant frequencies and mode shapes based on a finite element p...