Now showing items 5041-5060 of 5118

    • Very strong Rydberg atom scattering in K(12p)–CH3NO2collisions: Role of transient ion pair formation 

      Kelley, M.; Buathong, S.; Dunning, F.B. (2017)
      Collisions between K(12p) Rydberg atoms and CH3NO2 target molecules are studied. Whereas CH3NO2 can form long-lived valence-bound CH3NO−2NO2− ions, the data provide no evidence for production of long-lived K+⋯⋯CH3NO−2NO2− ion pair states. Rather, the data show that collisions result in unusually strong Rydberg atom scattering. This behavior is ...
    • A viable Arabidopsis pex13 missense allele confers severe peroxisomal defects and decreases PEX5 association with peroxisomes 

      (2014)
      Peroxisomes are organelles that catabolize fatty acids and compartmentalize other oxidative metabolic processes in eukaryotes. Using a forward-genetic screen designed to recover severe peroxisome-defective mutants, we isolated a viable allele of the peroxisome biogenesis gene PEX13 with striking peroxisomal defects. The pex13-4 mutant requires an ...
    • Video Compressive Sensing for Spatial Multiplexing Cameras Using Motion-Flow Models 

      Sankaranarayanan, Aswin C.; Xu, Lina; Studer, Christoph; Li, Yun; Kelly, Kevin F.; (2015)
      Spatial multiplexing cameras (SMCs) acquire a (typically static) scene through a series of coded projections using a spatial light modulator (e.g., a digital micromirror device) and a few optical sensors. This approach finds use in imaging applications where full-frame sensors are either too expensive (e.g., for short-wave infrared wavelengths) or ...
    • Vietnam: Neglected tropical diseases in an emerging and accelerating economy 

      Pham, Kala; Hotez, Peter J.; James A Baker III Institute of Public Policy (2022)
    • Vision and Deep Learning-Based Algorithms to Detect and Quantify Cracks on Concrete Surfaces from UAV Videos 

      Bhowmick, Sutanu; Nagarajaiah, Satish; Veeraraghavan, Ashok (2020)
      Immediate assessment of structural integrity of important civil infrastructures, like bridges, hospitals, or dams, is of utmost importance after natural disasters. Currently, inspection is performed manually by engineers who look for local damages and their extent on significant locations of the structure to understand its implication on its global ...
    • A visual and curatorial approach to clinical variant prioritization and disease gene discovery in genome-wide diagnostics 

      James, Regis A.; Campbell, Ian M.; Chen, Edward S.; Boone, Philip M.; Rao, Mitchell A.; (2016)
      Background: Genome-wide data are increasingly important in the clinical evaluation of human disease. However, the large number of variants observed in individual patients challenges the efficiency and accuracy of diagnostic review. Recent work has shown that systematic integration of clinical phenotype data with genotype information can improve ...
    • Visual Motion Coherence Responses in Human Visual Cortex 

      Rina, Andriani; Papanikolaou, Amalia; Zong, Xiaopeng; Papageorgiou, Dorina T.; Keliris, Georgios A.; (2022)
      Random dot kinematograms (RDKs) have recently been used to train subjects with cortical scotomas to perform direction of motion discrimination, partially restoring visual motion perception. To study the recovery of visual perception, it is important to understand how visual areas in normal subjects and subjects with cortical scotomas respond to RDK ...
    • Visualizing oil displacement with foam in a microfluidic device with permeability contrast 

      (2014)
      Foam mobility control and novel oil displacement mechanisms were observed in a microfluidic device representing a porous media system with layered permeability. Foam was pre-generated using a flow focusing microfluidic device and injected into an oil-wet, oil-saturated 2-D PDMS microfluidic device. The device is designed with a central fracture flanked ...
    • Visualizing the double-gyroid twin 

      Feng, Xueyan; Zhuo, Mujin; Guo, Hua; Thomas, Edwin L. (2021)
      Periodic gyroid network materials have many interesting properties (band gaps, topologically protected modes, superior charge and mass transport, and outstanding mechanical properties) due to the space-group symmetries and their multichannel triply continuous morphology. The three-dimensional structure of a twin boundary in a self-assembled ...
    • Vital-dye-enhanced multimodal imaging of neoplastic progression in a mouse model of oral carcinogenesis 

      (2013)
      In this longitudinal study, a mouse model of 4-nitroquinoline 1-oxide chemically induced tongue carcinogenesis was used to assess the ability of optical imaging with exogenous and endogenous contrast to detect neoplastic lesions in a heterogeneous mucosal surface. Widefield autofluorescence and fluorescence images of intact 2-NBDG-stained and ...
    • Volcanic ash as a driver of enhanced organic carbon burial in the Cretaceous 

      Lee, Cin-Ty A.; Jiang, Hehe; Ronay, Elli; Minisini, Daniel; Stiles, Jackson; (2018)
      On greater than million year timescales, carbon in the ocean-atmosphere-biosphere system is controlled by geologic inputs of CO2ᅠthrough volcanic and metamorphic degassing. High atmospheric CO2ᅠand warm climates in the Cretaceous have been attributed to enhanced volcanic emissions of CO2ᅠthrough more rapid spreading at mid-ocean ridges and, in ...
    • Volcano-shape glycerol oxidation activity of palladium-decorated gold nanoparticles 

      (2014)
      Bimetallic PdAu catalysts are more active than monometallic ones for the selective oxidation of alcohols, but the reasons for improvement remain insufficiently detailed. A metal-on-metal material can probe the structure–catalysis relationship more clearly than conventionally prepared bimetallics. In this study, Pd-on-Au nanoparticles with variable ...
    • Voltage tuning of vibrational mode energies in single-molecule junctions 

      (2014)
      Vibrational modes of molecules are fundamental properties determined by intramolecular bonding, atomic masses, and molecular geometry, and often serve as important channels for dissipation in nanoscale processes. Although single-molecule junctions have been employed to manipulate electronic structure and related functional properties of molecules, ...
    • Vortex patterns and the critical rotational frequency in rotating dipolar Bose-Einstein condensates 

      Cai, Yongyong; Yuan, Yongjun; Rosenkranz, Matthias; Pu, Han; Bao, Weizhu (2018)
      Based on the two-dimensional mean-field equations for pancake-shaped dipolar Bose-Einstein condensates in a rotating frame, for both attractive and repulsive dipole-dipole interaction (DDI) as well as arbitrary polarization direction, we study the profiles of the single vortex state and show how the critical rotational frequency changes with the s-wave ...
    • Vortex-like kinematic signal, spirals, and beam smearing effect in the HD 142527 disk 

      Boehler, Y.; Ménard, F.; Robert, C. M. T.; Isella, A.; Pinte, C.; (2021)
      Vortices are one of the most promising mechanisms to locally concentrate millimeter dust grains and allow the formation of planetesimals through gravitational collapse. The outer disk around the binary system HD 142527 is known for its large horseshoe structure with azimuthal contrasts of ~3–5 in the gas surface density and of ~50 in the dust. Using ...
    • Vote-by-Phone: An Investigation of a Usable and Accessible IVR Voting System 

      Holmes, Danae; Kortum, Philip (2016)
      One of the main goals of the Help America Vote Act (HAVA) was to ensure that voters with disabilities could vote privately and independently. However, the current state of most voting methods does not allow for private and independent voting for everyone. In response to this issue, we tested a remote IVR voting system developed by Author 1 and Author ...
    • Vulcan: Improved long-read mapping and structural variant calling via dual-mode alignment 

      Fu, Yilei; Mahmoud, Medhat; Muraliraman, Viginesh Vaibhav; Sedlazeck, Fritz J; Treangen, Todd J (2021)
      Long-read sequencing has enabled unprecedented surveys of structural variation across the entire human genome. To maximize the potential of long-read sequencing in this context, novel mapping methods have emerged that have primarily focused on either speed or accuracy. Various heuristics and scoring schemas have been implemented in widely used read ...
    • W+W− boson pair production in proton-proton collisions at √s=13  TeV 

      CMS Collaboration (2020)
      A measurement of the W+W− boson pair production cross section in proton-proton collisions at √s=13  TeV is presented. The data used in this study are collected with the CMS detector at the CERN LHC and correspond to an integrated luminosity of 35.9  fb−1. The W+W− candidate events are selected by requiring two oppositely charged leptons (electrons ...
    • Wafer-scale monodomain films of spontaneously aligned single-walled carbon nanotubes 

      He, Xiaowei; Gao, Weilu; Xie, Lijuan; Li, Bo; Zhang, Qi; (2016)
      The one-dimensional character of electrons, phonons and excitons in individual single-walled carbon nanotubes leads to extremely anisotropic electronic, thermal and optical properties. However, despite significant efforts to develop ways to produce large-scale architectures of aligned nanotubes, macroscopic manifestations of such properties remain ...
    • Walking along chromosomes with super-resolution imaging, contact maps, and integrative modeling 

      Nir, Guy; Farabella, Irene; Estrada, Cynthia Pérez; Ebeling, Carl G.; Beliveau, Brian J.; (2018)
      Chromosome organization is crucial for genome function. Here, we present a method for visualizing chromosomal DNA at super-resolution and then integrating Hi-C data to produce three-dimensional models of chromosome organization. Using the super-resolution microscopy methods of OligoSTORM and OligoDNA-PAINT, we trace 8 megabases of human chromosome ...