Now showing items 3664-3683 of 3787

    • Vacuum Bloch–Siegert shift in Landau polaritons with ultra-high cooperativity 

      Li, Xinwei; Bamba, Motoaki; Zhang, Qi; Fallahi, Saeed; Gardner, Geoff C.; Gao, Weilu; Lou, Minhan; Yoshioka, Katsumasa; Manfra, Michael J.; Kono, Junichiro (2018)
      A two-level system resonantly interacting with an a.c. magnetic or electric field constitutes the physical basis of diverse phenomena and technologies. However, Schrödinger’s equation for this seemingly simple system can ...
    • VALID: Custom ASIC Verification and FPGA Education Platform 

      Murphy, Patrick; Welsh, Erik; Frantz, Patrick; Hardy, Ricky; Mohsenin, Tinoosh; Cavallaro, Joseph R. (2003-06-01)
      This paper describes VALID, a platform for testing student designed ASICs and for teaching the basics of FPGA design. VALID is designed to maximize ease of use from a student?s perspective while maintaining enough flexibility ...
    • Valley trion dynamics in monolayerᅠMoSe2 

      Gao, Feng; Gong, Yongji; Titze, Michael; Almeida, Raybel; Ajayan, Pulickel M.; Li, Hebin (2016)
      Charged excitons called trions play an important role in the fundamental valley dynamics in newly emerging two-dimensional semiconductor materials. We use ultrafast pump-probe spectroscopy to study the valley trion dynamics ...
    • Value-Driven Redundancy Elimination 

      Simpson, Loren Taylor (1996-04)
      Value-driven redundancy elimination is a combination of value numbering and code motion. Value numbering is an optimization that assigns numbers to values in such a way that two values are assigned the same number if the ...
    • Valuing the Air Quality Effects of Biochar Reductions on Soil NO Emissions 

      Pourhashem, Ghasideh; Rasool, Quazi Z.; Zhang, Rui; Medlock, Kenneth B.; Cohan, Daniel S.; Masiello, Caroline A. (2017)
      While it is clear that biochar can alter soil N2O emissions, data on NO impacts are scarce. Reports range from 0 to 67% soil NO emission reductions postbiochar amendment. We use regional air quality and health cost models ...
    • Variable-Rate Universal Slepian-Wolf Coding with Feedback 

      Sarvotham, Shriram; Baron, Dror; Baraniuk, Richard G. (2005-11-01)
      Traditional Slepian-Wolf coding assumes known statistics and relies on asymptotically long sequences. However, in practice the statistics are unknown, and the input sequences are of finite length. In this finite regime, ...
    • Variance Spectroscopy 

      Streit, Jason K.; Bachilo, Sergei M.; Sanchez, Stephen R.; Lin, Ching-Wei; Weisman, R. Bruce (2015)
      Spectroscopic analysis and study of nanoparticle samples is often hampered by structural diversity that presents a complex superposition of spectral signatures. By probing the spectra of small volumes within dilute samples, ...
    • Variant interpretation through Bayesian fusion of frequency and genomic knowledge 

      Shaw, Chad A.; Campbell, Ian M. (2015)
      Variant interpretation is a central challenge in genomic medicine. A recent study demonstrates the power of Bayesian statistical approaches to improve interpretation of variants in the context of specific genes and syndromes. ...
    • Variational Subdivision for Laplacian Splines 

      Warren, Joe; Weimer, Henrik (1997-10-03)
      The fundamental problem of geometric design is the representation of curved shapes. Traditionally such shapes are represented by parametric spline curves, e.g. NURBS, which are defined as the minimizers of variational ...
    • Variationally Constrained Numerical Solution of Electrical Impedance Tomography 

      Borcea, Liliana; Gray, Genetha Anne; Zhang, Yin (2002-10)
      We propose a novel, variational inversion methodology for the electrical impedance tomography problem, where we seek electrical conductivity σ inside a bounded, simply connected domain Ω, given simultaneous measurements ...
    • Variations in optical coherence tomography resolution and uniformity: a multi-system performance comparison 

      Fouad, Anthony; Pfefer, T. Joshua; Chen, Chao-Wei; Gong, Wei; Agrawal, Anant; Tomlins, Peter H.; Woolliams, Peter D.; Drezek, Rebekah A.; Chen, Yu (2014)
      Point spread function (PSF) phantoms based on unstructured distributions of sub-resolution particles in a transparent matrix have been demonstrated as a useful tool for evaluating resolution and its spatial variation across ...
    • Variations of Structured Broyden Families for Nonlinear Least Squares Problems 

      Yabe, H. (1992-06)
      In this paper, we consider structured quasi-Newton methods for finding a local solution to nonlinear least squares problems. This paper is concerned with the line search globalization method. Recently, factorized versions ...
    • Vector bin-and-cancel for MIMO distributed full-duplex 

      Bai, Jingwen; Sabharwal, Ashutosh (2017)
      Abstract In a multi-input multi-output (MIMO) full-duplex network, where an in-band full-duplex infrastructure node communicates with two half-duplex mobiles supporting simultaneous up- and downlink flows, ...
    • Velocity Analysis in the Presence of Uncertainty 

      Dussaud, Eric Albert (2006-06)
      Velocity analysis resolves relatively long scales of earth structure, on the order of 1 km. Migration produces images with length scales (wavelengths) on the order of 10's of m. In between these two scale regimes lies ...
    • Velocity Inversion by Coherency Optimization 

      Symes, William W.; Carazzone, J.J. (1989-08)
      We introduce an approach to velocity and reflectivity estimation based on optimizing the coherence of multiple shot-gather inversions of reflection seismograms. The resulting algorithm appears to avoid the severe convergence ...
    • Velocity Inversion by Coherency Optimization 

      Symes, William W. (1988-04)
      We introduce an approach to velocity and reflectivity estimation based on optimizing the coherence of multiple shot-gather inversions of reflection seismograms. The resulting algorithm appears to avoid the severe convergence ...
    • Velocity Inversion by Differential Semblance Optimization for 2D Common Source Data 

      Symes, William W.; Kern, Michel (1992-04)
      Differential Semblance Optimization ("DSO") is a variant of data-fitting (least-squares) inversion of reflection seismograms. The misfit functions used in other implementations of least-squares inversion (for example ...
    • Velocity Inversion: A Case Study in Infinite-Dimensional Optimization 

      Symes, William W. (1988-07)
      The goal of seismic velocity inversion is the estimation of seismic wave velocities inside the earth by attempting to predict, in a least-error sense, seismic waveforms measured at its surface. We present velocity inversion ...
    • Ventricular coupling in single ventricle patients: a MRI study of cardiac biomechanics 

      Krishnamurthy, Ramkumar; Noel, Cory V.; Pan, Wei; Jacot, Jeffrey; Lantin-Hermoso, Regina; Krishnamurthy, Rajesh (2016)
    • Verification of Fair Transition Systems 

      Kupferman, Orna; Vardi, Moshe Y. (1997-08-27)
      In program verification we check that an implementation meets its specification. Both the specification and the implementation describe the possible behaviors of the program, though at different levels of abstraction. We ...