Practicing Professional Communication Principles by Creating Public Service Announcements

Realizing public announcements by justifications

Modal public announcement logics study how beliefs change after public announcements. However, these logics cannot express the reason for a new belief. Justification logics fill this gap since they can formally represent evidence and justifications for an agent’s belief. We present OPAL(K) and JPAL(K), two alternative justification counterparts of Gerbrandy–Groeneveld’s public announcement logi...

Suicide prevention public service announcements: perceptions of young adults.

BACKGROUND Determining optimal methods for preventing suicide continues to be an elusive goal. AIMS The study examines benefits and possible untoward effects of public service announcements (PSAs) for young adults. METHODS Young adult participants (N = 279) were randomly assigned to one of three conditions: (a) a billboard simulation, (b) a 30-s TV ad simulation, and (c) a no-information co...

Anti-Drug Public Service Announcements: Progress or Placebos?

Fully Arbitrary Public Announcements

Total Public Announcements

We present a dynamic epistemic logic for knowledge change of rational agents. Existing approaches only deal with partial public announcements, that means an announcement may lead to an inconsistent state. We introduce an extension of the multi-modal logic S5n featuring total public announcements where an update cannot result in an inconsistency. We also study total public announcements in the c...