  The present paper is based upon the fact that if an object is part of a
highly stable oscillating system, it is possible to obtain an extremely precise
measure for its mass in terms of the energy trapped in this resonance. The
subject is timely since there is great interest in Metrology on the
establishment of a new electronic standard for the kilogram. Our contribution
to such effort includes both the proposal of an alternative definition for mass
in terms of energy, as well as the description of a realistic experimental
system in which this definition might actually be applied. The setup consists
of an oscillating type-II superconducting loop (the SEO system) subjected to
the gravity and magnetic fields. The system is shown to be able to reach a
dynamic equilibrium by trapping energy up to the point it levitates against the
surrounding magnetic and gravitational fields, behaving as an extremely high-Q
spring-load system. The proposed energy-mass equation applied to the
electromechanical oscillating system eventually produces a new experimental
relation between mass and standardized constants.
