We investigated the possibility of preserving a preset plane flying formation through geodesic (free) motion around an attractive centre. After a series of approximations, we obtained a first order solution for this problem (the small parameter of the approximation series is set by the characteristic length of the formation and by an eccentricity-like factor, which is related to the trajectory ...

The terahertz (THz) radiation refers to electromagnetic waves between infrared and millimeter waves. THz technology has shown a significant potential for medical diagnosis biomedical applications over the past three decades. Therefore, exploring biological effects of become an important new field in life sciences. Specifically, been proved be able diagnose treat several head neck diseases. In t...

In the improvement of forage crop varieties knowledge of~e .extent of cross-fertilization is of value for (1) de~g the extent and randomness of crossing in breedmg procedures, (2) estimating varietal changes due to contamination and mechanical mixtures, and (3) evaluating effects of cross,fertilization in the development and production of synthetic and hybrid combinations. Genetic markers can a...