In this paper, we study the likelihood of chaos appearance during domain wall motion induced by electronic transfer. Considering a time-varying current density theory, we proceed to a numerical investigation of the dynamics. Using the dissipation parameter, amplitude and frequency of current density as control parameters; we show how periodic regime as well as chaotic regime can be exhibited in nanomagnetic systems. Numerical results allow setting up the periodicity and quasi-periodicity of system and chaotic phenomena occurring during magnetization switching process in nanomagnet through electronic transfer.
Regardless of which (model-centric or
code-centric) development process is adopted, industrial software production
ultimately and necessarily requires the delivery of an executable
implementation. It is generally accepted that the quality of such an
implementation is of utmost importance. Yet current verification techniques,
including software testing, remain problematic. In this paper, we focus on
acceptance testing, that is, on the validation of the actual behavior of the
implementation under test against the requirements of stakeholder(s). This task
must be as objective and automated as possible. Our first goal is to review
existing code-based and model-based tools for testing in light of what such an
objective and automated approach to acceptance testing entails. Our contention
is that the difficulties we identify originate mainly in a lack of traceability
between a testable model of the requirements of the stakeholder(s) and the test
cases used to validate these requirements. We then investigate whether such
traceability is addressed in other relevant specification-based approaches.