The dynamic response in a large experimental time window (10 –10 s) of Co and CoPt nanoparticle systems is reported. In order to reveal the dynamics effects, along with classic experiments as a.c. susceptibility and static magnetic measurements, a rf temperature dependent transverse susceptibility experiment is used. To study the effect of interaction between particles, samples of Co and CoPt n...

An instability in the Proton Storage Ring (PSR) is observed as fast loss of beam during accumulation and storage when the injected beam current exceeds a threshold value. Experimental study results of that instability are presented in this paper. The instability threshold depends significantly on rf voltage, injected momentum spread, and PSR sextupole and octupole strengths. The results are con...

Costas and sonar sequences were respectively introduced in [2] and [10] to deal with the following problem: “An object is moving towards (or away) from an observer, who wants to know effectively the distance to the object and its velocity.” The solution to the problem makes use of the Doppler effect, which states the following: when a signal bounces off a moving target its frequency changes in ...

— A new parameter estimation algorithm, known as Sub-band Dual Frequency Conjugate LVT (SDFC-LVT), is proposed for the ground moving targets. This algorithm first constructs two sub-band signals with different central frequencies. After that, the two signals are shifted by different values in frequency domain and a new signal is constructed by multiplying one with the conjugate of the other. Fi...

We study the possibility of self-trapping of an optical beam in a photorefractive medium under the combined influence of diffraction and self-scattering (two-wave mixing) of its spatial frequency components. We investigate the spectrum of solutions for the resulting photorefractive spatial solitons and discuss their unique properties. Design considerations and material requirements for experime...

The Flying-Adder frequency synthesis architecture is a novel approach of generating frequencies on chip. Since its invention, it has been used in many commercial products to cope with difficult frequency generation challenges. Along the course of this architecture’s evolution, various circuitand system-level problems have been resolved. In this paper, one remaining problem related to circuit im...