It is pointed out that a widely used simple formula may give rise to serious errors in profiling deep level concentrations from capacitance transient experiments. A correction formula is derived based on the space-charge analysis.

It has been shown that phase-locked cavities have a quantised transfer function (Jennison 1979) and that they account for the property of inertia (Jennison and Drinkwater 1977). The analysis in this paper shows that only half of the rest energy of a phase-locked cavity contributes actively to the inertial force. The moment of inertia of such a system about its own axis is only half that of a classical rigid body of the same total rest mass distributed in the same region of space. If a phase-locked cavity is used as a model of a fundamental particle then it is concluded that the particle is a fermion with a rest mass corresponding to its total rest energy.

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It is pointed out that sequential tunneling has, until now, been defined in two ways in the literature, and this has led to some confusion. It is shown that sequential tunneling defined as a two-step process is an alternative description of resonant tunneling, but not an alternative mechanism for it.