Now showing items 18173-18192 of 75835

    • Dye Quenching of Carbon Nanotube Fluorescence Reveals Structure-Selective Coating Coverage 

      Zheng, Yu; Alizadehmojarad, Ali A.; Bachilo, Sergei M.; Kolomeisky, Anatoly B.; Weisman, R. Bruce; (2020)
      Many properties and applications of single-wall carbon nanotubes (SWCNTs) depend strongly on the coatings that allow their suspension in aqueous media. We report that SWCNT fluorescence is quenched by reversible physisorption of dye molecules such as methylene blue, and that measurements of that quenching can be used to infer structure-specific ...
    • Dye-Assisted Gain of Strongly Confined Surface Plasmon Polaritons in Silver Nanowires 

      Subwavelength confinement and active control of light is essential for nanoscale communication devices at visible frequencies that support large bandwidths.[1-5] Noble-metal nanostructures present an excellent platform for strongly confined optical waveguides [6-13] because of their ability to support surface plasmon polaritons (SPPs).[14] However, ...
    • Dying in the Face of the COVID-19 Pandemic: Contextual Considerations and Clinical Recommendations 

      LeRoy, Angie S.; Robles, Barbara; Kilpela, Lisa S.; Garcini, Luz M. (2020)
      Dying is a natural part of life; however, death is often a fearful, frightening event. Dying in the midst of the COVID-19 pandemic presents challenges that magnify normative fears and may interfere with a healthy grieving process. To maintain a resilient spirit among those who are at risk of losing a loved one or who have lost a family member to ...
    • Dying Slave 

      Manca, Joseph, 1956-
    • Dying Slave 

      Manca, Joseph, 1956-
    • A Dyke in the Delta at the Time of the Inundation 

      A group of people standing on top of a levee between two flooded areas.
    • Dynamic Agenda Setting 

      Chen, Ying; Eraslan, Hülya (2017)
      A party in power can address a limited number of issues. What issues to address--the party's agenda--has dynamic implications because it affects what issues will be addressed in the future. We analyze a model in which the incumbent addresses one issue among many and the remaining issues roll over to the next period. We show that no strategic manipulation ...

      The objectives of the studies reported in this dissertation are: (1) to develop improved techniques for evaluating the dynamic response of viscously damped linear systems, and (2) to contribute concepts and information which will lead to an improved insight into the dynamic response of such systems. The dissertation consists of two major parts. The ...
    • Dynamic analysis of stacked rigid blocks 

      Roussis, Panayiotis C. (1999)
      The dynamic behavior of structures of two stacked rigid blocks subjected to ground excitation is examined. Assuming no sliding, the rocking response of the system standing free on a rigid foundation is investigated. The analytical formulation of this nonlinear problem is quite challenging. Its complexity is associated with the continuous transition ...
    • Dynamic analysis of systems with hysteretic damping 

      Pavlou, Eleni A. (1999)
      Experimental observations have shown that the dissipation per cycle in many materials does not depend on the deformation frequency over a wide frequency range. A linear model used frequently to represent this type of mechanical behavior is the concept of hysteretic damping. Herein, time and frequency domain models of hysteretic damping are investigated. ...
    • Dynamic aspects of emulsion stability 

      Pena, Alejandro A. (2004)
      This dissertation encompasses novel theoretical, experimental and computational advances in the understanding of the transient behavior of emulsions undergoing phase separation. Firstly, the kinetics of dissolution of single drops of pure hydrocarbons and their mixtures in aqueous solutions of a nonionic surfactant (C12E8) was studied theoretically ...
    • Dynamic Assembly of Human Salivary Stem/Progenitor Microstructures Requires Coordinated α1β1 Integrin-Mediated Motility 

      Wu, Danielle; Witt, Robert L.; Harrington, Daniel A.; Farach-Carson, Mary C. (2019)
      A tissue engineering approach can provide replacement salivary gland structures to patients with hyposalivation disorders and xerostomia. Salivary human stem/progenitor cells (hS/PCs) were isolated from healthy regions of parotid glands of head and neck surgery patients, expanded, then encapsulated in biocompatible hyaluronate (HA)-based hydrogels. ...
    • Dynamic Assertion-Based Verification for SystemC 

      Tabakov, Deian (2011)
      SystemC has emerged as a de facto standard modeling language for hardware and embedded systems. However, the current standard does not provide support for temporal specifications. Specifically, SystemC lacks a mechanism for sampling the state of the model at different types of temporal resolutions, for observing the internal state of modules, and for ...

      YANG, JONG YIH (1976)
    • Dynamic characterization of bacterial optogenetic sensors and their use in manipulating the gut microbiome to extend host longevity 

      Hartsough, Lucas (2018-04-11)
      The development and characterization of novel sensor elements are critical to synthetic biology, as they enable engineered organisms to respond intelligently and predictably to their environment. Bacterial two component systems (TCSs) are a particularly attractive family of sensors by virtue of their ubiquity and sensing diversity. We have previously ...
    • Dynamic Characterization of Multivariate Time Series 

      MELNIKOV, OLEG (2017-12-01)
      The standard non-negative matrix factorization focuses on batch learning assuming that the fixed global latent parameters completely describe the observations. Many online extensions assume rigid constraints and smooth continuity in observations. However, the more complex time series processes can have multivariate distributions switch between a ...