Results concerning the active control of transmission of turbulent boundary layer noise using smart foam elements will be presented. Smart foam consists of a cylindrical shaped PVDF film embedded within partially reticulated polyurethane acoustic foam. A smart foam element is an active–passive control device utilizing the passive absorption characteristics of the foam (effective at high frequencies) and the electrically driven PVDF film as the active element (effective at lower frequencies). This lightweight, compact arrangement lends itself well to the control of aircraft cabin noise resulting from an exterior turbulent boundary layer. Six smart foam elements (each 2 in. thick×4 in.×5 in.) are used to control the sound transmission through a 0.05 in. thick×10 in.×20 in. aluminum plate mounted in a wind tunnel. The sound transmission is monitored by measuring the pressure inside an externally mounted anechoic box that encloses the plate. Various control strategies are tested and results compared.

Libraries have adapted and are continuing to adapt to the rapidly changing information and data needs of the communities they support. The following paper presents the evolution of Virginia Tech University Libraries, with special attention given to program and service developments in data and information science. The author describes leadership strategies for advancing services, shares stories about developing sustainable, human-centered, and technology-enhanced service infrastructures, and paints a picture of aspirations to enable individuals' success through active campus engagement. The paper will end with an overview of challenges and opportunities for future collaboration within higher education and beyond.

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