Coherent control of the optical emission in a single organic quantum wire.

We report on the first coherent control experiments on a purely electronic exciton state in an extended quasi-perfect organic quantum wire, a polydiacetylene chain isolated in the crystalline matrix of its own monomer. The time-integrated luminescence of a single wire is measured as the relative phase between two exciting sub-picosecond laser pulses is varied. From visibility functions the exciton dephasing time is extracted and its temperature dependence studied.

Establishing incidence and administrative protocols for do not resuscitate orders.

An order not to resuscitate refers only to CPR and does not imply the omission of any other type of medical care. Institutional DNR policies should include specific statements reflecting resuscitation for those without DNR orders, the patients' wishes, medical conditions, roles of family, protocol describing the process for DNR orders, scope of DNR orders, and frequency of review of DNR orders. The most common reasons for not having written DNR protocols were that directors of nursing did not have guidelines for or did not feel qualified to develop policies, and that they were not sure of the legal implications of such policies.