Ruth Beckey Irwin

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The focused ion beam (FIB) tool has been successfully used as both a stand alone analytical instrument and a means to prepare specimens for subsequent analysis by SEM, TEM, SIMS, XPS, and AUGER. In this work, special emphasis is given to TEM specimen preparation by the FIB lift-out technique. The fundamental ion/solid interactions that govern the FIB(More)
A site-specific technique for cross-section transmission electron microscopy specimen preparation of difficult materials is presented. A focused ion beam was used to slice an electron transparent membrane from a specific area of interest within a bulk sample. Micromanipulation lift-out procedures were then used to transport the electron-transparent specimen(More)
  • R B Irwin
  • Journal of communication disorders
  • 1981
Fifteen students in speech pathology observed and reacted to video replay of clinical sessions, representing presituation and postsituation tests with intervening microtherapy sessions, which were also videotaped and replayed. Reactions to video replays were made to questions. Experience through microtherapy and video self-confrontation gives more evidence(More)