Now showing items 1-20 of 1736

    • Real-time video mosaicing with a high-resolution microendoscope 

      Bedard, Noah; Quang, Timothy; Schmeler, Kathleen; Richards-Kortum, Rebecca; Tkaczyk, Tomasz S. (9/7/2012)
      Microendoscopes allow clinicians to view subcellular features in vivo and in real-time, but their field-of-view is inherently limited by the small size of the probe's distal end. Video mosaicing has emerged as an effective ...
    • Imaging molecular adsorption and desorption dynamics on graphene using terahertz emission spectroscopy 

      Ajayan, P.M.; Kono, J.; Tonouchi, M. (8/13/2014)
      Being an atomically thin material, graphene is known to be extremely susceptible to its environment, including defects and phonons in the substrate on which it is placed as well as gas molecules that surround it. Thus, any ...
    • Plasmonic Polymers Unraveled Through Single Particle Spectroscopy 

      Slaughter, Liane S.; Wang, Lin-Yung; Willingham, Britain A.; Olson, Jana M.; Swanglap, Pattanawit; Dominguez-Medina, Sergio; Link, Stephan (8/13/2014)
      Plasmonic polymers are quasi one-dimensional assemblies of nanoparticles whose optical responses are governed by near-field coupling of localized surface plasmons. Through single particle extinction spectroscopy correlated ...
    • Elimination of Metastatic Melanoma Using Gold Nanoshell-Enabled Photothermal Therapy and Adoptive T Cell Transfer 

      Bear, Adham S.; Kennedy, Laura C.; Young, Joseph K.; Perna, Serena K.; Almeida, Joao Paulo Mattos; Lin, Adam Y.; Eckels, Phillip C.; Drezek, Rebekah A.; Foster, Aaron E. (7/23/2013)
      Ablative treatments such as photothermal therapy (PTT) are attractive anticancer strategies because they debulk accessible tumor sites while simultaneously priming antitumor immune responses. However, the immune response ...
    • Compact solar autoclave based on steam generation using broadband light-harvesting nanoparticles 

      Neumann, Oara; Feronti, Curtis; Neumann, Albert D.; Dong, Anjie; Schell, Kevin; Lu, Benjamin; Kim, Eric; Quinn, Mary; Thompson, Shea; Grady, Nathaniel; Nordlander, Peter; Oden, Maria; Halas, Naomi J. (7/16/2013)
      The lack of readily available sterilization processes for medicine and dentistry practices in the developing world is a major risk factor for the propagation of disease. Modern medical facilities in the developed world ...
    • Photobleaching Lifetimes of Cyanine Fluorophores Used for Single Molecule Förster Resonance Energy Transfer in the Presence of Various Photoprotection Systems 

      Cooper, David; Uhm, Heui; Tauzin, Lawrence J.; Poddar, Nitesh; Landes, Christy F. (6/17/2013)
      We investigated various photoprotection system combinations to find the combination that optimally extended the photobleach lifetime of a Cy3/Cy5 smFRET pair attached to a DNA hairpin in a single-molecule environment. We ...
    • Multimodal snapshot spectral imaging for oral cancer diagnostics: a pilot study 

      Bedard, Noah; Schwarz, Richard A.; Hu, Aaron; Bhattar, Vijayashree; Howe, Jana; Williams, Michelle D.; Gillenwater, Ann M.; Richards-Kortum, Rebecca; Tkaczyk, Tomasz S. (5/24/2013)
      Optical imaging and spectroscopy have emerged as effective tools for detecting malignant changes associated with oral cancer. While clinical studies have demonstrated high sensitivity and specificity for detection, current ...
    • Nanowire electrodes for high-density stimulation and measurement of neural circuits 

      Robinson, Jacob T.; Jorgolli, Marsela; Park, Hongkun (3/12/2013)
      Brain-machine interfaces (BMIs) that can precisely monitor and control neural activity will likely require new hardware with improved resolution and specificity. New nanofabricated electrodes with feature sizes and densities ...
    • Low-Loss Coupling of Quantum Cascade Lasers into Hollow-Core Waveguides with Single-Mode Output in the 3.7–7.6 μm Spectral Range 

      Patimisco, Pietro; Sampaolo, Angelo; Mihai, Laura; Giglio, Marilena; Kriesel, Jason; Sporea, Dan; Scamarcio, Gaetano; Tittel, Frank K.; Spagnolo, Vincenzo (2016)
      We demonstrated low-loss and single-mode laser beam delivery through hollow-core waveguides (HCWs) operating in the 3.7–7.6 μm spectral range. The employed HCWs have a circular cross section with a bore diameter of 200 μm ...
    • Impact of Environmental Variables on the Reduction of Nitric Acid by Proxies for Volatile Organic Compounds Emitted by Motor Vehicles 

      Leong, Y. J.; Rutter, A.P.; Wong, H.Y.; Gutierrez, C.V.; Junaid, M.; Scheuer, E.; Gong, L.; Lewicki, R.; Dibb, J.E.; Tittel, F.K.; Griffin, R.J. (2016)
      Recent work has identified nitric acid (HNO3) as a potential precursor of nitrous acid (HONO), which is an important source of oxidants that regulate ozone and particulate pollution. Recent work in our laboratory has ...
    • High Chromaticity Aluminum Plasmonic Pixels for Active Liquid Crystal Displays 

      Olson, Jana; Manjavacas, Alejandro; Basu, Tiyash; Huang, Da; Schlather, Andrea E.; Zheng, Bob; Halas, Naomi; Nordlander, Peter; Link, Stephan (2016)
      Chromatic devices such as flat panel displays could, in principle, be substantially improved by incorporating aluminum plasmonic nanostructures instead of conventional chromophores that are susceptible to photobleaching. ...
    • Adsorption and Unfolding of a Single Protein Triggers Nanoparticle Aggregation 

      Dominguez-Medina, Sergio; Kisley, Lydia; Tauzin, Lawrence J.; Hoggard, Anneli; Shuang, Bo; Indrasekara, A. Swarnapali D.S.; Chen, Sishan; Wang, Lin-Yung; Derry, Paul J.; Liopo, Anton; Zubarev, Eugene R.; Landes, Christy F.; Link, Stephan (2016)
      The response of living systems to nanoparticles is thought to depend on the protein corona, which forms shortly after exposure to physiological fluids and which is linked to a wide array of pathophysiologies. A mechanistic ...
    • Inference by Reparameterization using Neural Population Codes 

      Vasudeva Raju, Rajkumar (2015-12-04)
      Behavioral experiments on humans and animals suggest that the brain performs probabilistic inference to interpret its environment. Here we present a general-purpose, biologically plausible implementation of approximate ...
    • Evaluating Multihop Mobile Wireless Networks with Controllable Node Sparsity or Density 

      Amiri, Keyvan (2015-12-04)
      Simulation is the most widely used tool for evaluating the performance of multihop mobile wireless networks, yet such simulation has so far been limited due to the lack of sufficient wireless mobility models for creating ...
    • Nonlinear neural codes 

      Yang, Qianli (2015-12-03)
      Most natural task-relevant variables are encoded in the early sensory cortex in a form that can only be decoded nonlinearly. Yet despite being a core function of the brain, nonlinear population codes are rarely studied and ...
    • Rethinking Image Compression for the Object Detection Task 

      Barua, Souptik (2015-12-03)
      Traditionally, image compression algorithms, such as JPEG, have been designed for human viewers' satisfaction. Increasingly however, more and more images are being viewed by computers, for performing computer vision tasks ...
    • MIMO Broadcast Channels with Full-duplex feedback 

      Du, Xu (2015-12-03)
      In this thesis, I utilize full-duplex radios to increase the downlink spectral efficiency of MIMO broadcast channels by proposing a sequential beamforming strategy. In current half-duplex multiuser MIMO systems, non-trivial ...
    • Full-duplex Wireless with Large Antenna Arrays 

      Everett, Evan Jackson (2015-12-03)
      To meet the growing demand for wireless data, base stations with very large antenna arrays are being deployed in order to serve multiple users simultaneously. Concurrently, there is growing interest in full-duplex operation. ...
    • GPU Accelerated Reconfigurable Detector and Precoder for Massive MIMO SDR Systems 

      Li, Kaipeng (2015-12-02)
      We present a reconfigurable GPU-based unified detector and precoder for massive MIMO software-defined radio systems. To enable high throughput, we implement the linear minimum mean square error detector/precoder and further ...
    • A Resource-Aware Streaming-based Framework for Big Data Analysis 

      Darvish Rouhani, Bita (2015-12-02)
      The ever growing body of digital data is challenging conventional analytical techniques in machine learning, computer vision, and signal processing. Traditional analytical methods have been mainly developed based on the ...