1 Ghrelin is a fast-acting hormone that plays a vital role in meal initiation and contributes to weight gain.  Leptin mediates long-term regulation of energy balance and suppresses food intake, thereby inducing weight loss.
For the military, as for the civilian world, it is not overstating the point to say that the advent of radio communications has changed almost everything. The meerkat or suricate is a small mammal and a member of the mongoose family.
Surrogate-based analysis and optimization (SBAO) has been shown to be an effective approach for the design of computationally expensive models such as those found in aerospace systems, involving aerodynamics, structures, and propulsion, among other disciplines.