Windy stars that go with a bang

Things that go bang in the night.

Dealing with good intentions that go bad.

Q Several patients who had been receiving care at the same dental office recently transferred to our practice. Although their stories were slightly different, the results appeared to be the same. For example, 1 patient stated that she had seen a new dentist for her routine examination and cleaning, and the dentist found a cavity in her lower right molar as well as in several other teeth. After ...

Plowing with precedence: A variant of the windy postman problem

Strong Optimality for a Bang-Bang Trajectory

In this paper we give sufficient conditions for a bang-bang regular extremal to be a strong local optimum for a control problem in the Mayer form; strong means that we consider the C0 topology in the state space. The controls appear linearly and take values in a polyhedron, and the state space and the end point constraints are finite-dimensional smooth manifolds. In the case of bang-bang extrem...

Bang-Bang Operations from a Geometric Perspective

Strong, fast pulses, called ‘‘bang–bang’’ controls can be used to eliminate the effects of system-environment interactions. This method for preventing errors in quantum information processors is treated here in a geometric setting which leads to an intuitive perspective. Using this geometric description, we clarify the notion of group symmetrization as an averaging technique, provide a geometri...