Recent Submissions

  • Bayesian Correction Approach for Improving Dual-Frequency Precipitation Radar Rainfall Rate Estimates, A 

    Author(s):Ma, Yingzhao; Chandrasekar, V.; Biswas, Sounak K.
    Date Issued:2020-01-27
    The accurate estimation of precipitation is an important objective for the Dual-frequency Precipitation Radar (DPR), which is located on board the Global Precipitation Measurement (GPM) satellite core observatory. In this ...
  • Wavefront improvement in an injection-seeded soft x-ray laser based on a solid-target plasma amplifier 

    Author(s):Li, Lu; Wang, Yong; Wang, Shoujun; Oliva, Eduardo; Yin, Liang; Le, T. T. Thuy; Daboussi, Sameh; Ros, David; Maynard; Gilles; Sebban, Stephane; Hu, Bitao; Rocca, Jorge J; Zeitoun, Philippe
    Date Issued:2013-10-15
    The wavefront of an injection-seeded soft x-ray laser beam generated by amplification of high-harmonic pulses in a λ=18.9 nm molybdenum plasma amplifier was measured by a Hartmann wavefront sensor with an accuracy of λ/32 ...
  • Single-shot soft x-ray laser linewidth measurement using a grating interferometer 

    Author(s):Wang, Y.; Yin, L.; Wang, S.; Marconi, M. C.; Dunn, J.; Gullikson, E.; Rocca, J. J.
    Date Issued:2013-12-01
    The linewidth of a 14.7 nm wavelength Ni-like Pd soft x-ray laser was measured in a single shot using a soft x-ray diffraction grating interferometer. The instrument uses the time delay introduced by the gratings across ...
  • Plasmoid ejection and secondary current sheet generation from magnetic reconnection in laser-plasma interaction 

    Author(s):Dong, Quan-Li; Wang, Shou-Jun; Lu, Quan-Ming; Huang, Can; Yuan, Da-Wei; Liu, Xun; Lin, Xiao-Xuan; Li, Yu-Tong; Wei, Hui-Gang; Zhong, Jia-Yong; Shi, Jian-Rong; Jiang, Shao-En; Ding, Yong-Kun; Jiang, Bo-Bin; Du, Kai; He, Xian-Tu; Yu, M. Y.; Liu, C. S.; Wang, Shui; Tang, Yong-Jian; Zhu, Jian-Qiang; Zhao, Gang; Sheng, Zheng-Ming; Zhang, Jie
    Date Issued:2012-05-25
    Reconnection of the self-generated magnetic fields in laser-plasma interaction was first investigated experimentally by Nilson et al. [Phys. Rev. Lett. 97, 255001 (2006)] by shining two laser pulses a distance apart on a ...
  • Characteristic measurements of silicon dioxide aerogel plasmas generated in a Planckian radiation environment 

    Author(s):Dong, Quan-Li; Wang, Shou-Jun; Li, Yu-Tong; Zhang, Yi; Zhao, Jing; Wei, Hui-Gang; Shi, Jian-Rong; Zhao, Gang; Zhang, Ji-Yan; Gu, Yu-Qiu; Ding, Yong-Kun; Wen, Tian-Shu; Zhang, Wen-Hai; Hu, Xin; Liu, Shen-Ye; Zhang, Lin; Tang, Yong-Jian; Zhang, Bao-Han; Zheng, Zhi-Jian; Nishimura, Hiroaki; Fujioka, Shinsuke; Wang, Fei-Lu; Takabe, Hideaki; Zhang, Jie
    Date Issued:2010-01-06
    The temporally and spatially resolved characteristics of silicon dioxide aerogel plasmas were studied using x-ray spectroscopy. The plasma was generated in the near-Planckian radiation environment within gold hohlraum ...
  • Efficient picosecond x-ray pulse generation from plasmas in the radiation dominated regime 

    Author(s):Hollinger, Reed; Bargsten, Clayton; Shlyaptsev, Vyacheslav N.; Kaymak, Vural; Pukhov, Alexander; Capeluto, Maria Gabriela; Wang, Shoujun; Rockwood, Alex; Wang, Yong; Townsend, Amanda; Prieto, Amy; Stockton, Patrick; Curtis, Alden; Rocca, Jorge J.
    Date Issued:2017-10-27
    The efficient conversion of optical laser light into bright ultrafast x-ray pulses in laser created plasmas is of high interest for dense plasma physics studies, material science, and other fields. However, the rapid ...
  • Compact gain-saturated x-ray lasers down to 6.85 nm and amplification down to 5.85 nm 

    Author(s):Rockwood, Alex; Wang, Yong; Wang, Shoujun; Berrill, Mark; Shlyaptsev, Vyacheslav N.; Rocca, Jorge J.
    Date Issued:2018-03-02
    Plasma-based x-ray lasers allow single-shot nano-scale imaging and other experiments requiring a large number of photons per pulse to be conducted in compact facilities. However, compact repetitively fired gain-saturated ...
  • Micro-scale fusion in dense relativistic nanowire array plasmas 

    Author(s):Curtis, Alden; Calvi, Chase; Tinsley, James; Hollinger, Reed; Kaymak, Vural; Pukhov, Alexander; Wang, Shoujun; Rockwood, Alex; Wang, Yong; Shlyaptsev, Vyacheslav N.; Rocca, Jorge J.
    Date Issued:2018-03-14
    Nuclear fusion is regularly created in spherical plasma compressions driven by multi-kilojoule pulses from the world’s largest lasers. Here we demonstrate a dense fusion environment created by irradiating arrays of deuterated ...
  • 0.85  PW laser operation at 3.3  Hz and high-contrast ultrahigh-intensity λ = 400  nm second-harmonic beamline 

    Author(s):Wang, Yong; Wang, Shoujun; Rockwood, Alex; Luther, Bradley M.; Hollinger, Reed; Curtis, Alden; Calvi, Chase; Menoni, Carmen S.; Rocca, Jorge J.
    Date Issued:2017-09-22
    We demonstrate the generation of 0.85 PW, 30 fs laser pulses at a repetition rate of 3.3 Hz with a record average power of 85 W from a Ti:sapphire laser. The system is pumped by high-energy Nd:glass slab amplifiers frequency ...
  • Accurate characterization of winter precipitation using multi-angle snowflake camera, visual hull, advanced scattering methods and polarimetric radar 

    Author(s):Notaroš, Branislav M.; Bringi, Viswanathan N.; Kleinkort, Cameron; Kennedy, Patrick; Huang, Gwo-Jong; Thurai, Merhala; Newman, Andrew J.; Bang, Wonbae; Lee, GyuWon
    Date Issued:2016-06-11
    This article proposes and presents a novel approach to the characterization of winter precipitation and modeling of radar observables through a synergistic use of advanced optical disdrometers for microphysical and geometrical ...
  • Study of cloud classification with neural networks using spectral and textural features, A 

    Author(s):Bian, Bin; Shaikh, Mukhtiar A.; Azimi-Sadjadi, Mahmood R.; Vonder Haar, Thomas H.; Reinke, Donald L.
    Date:1999
    The problem of cloud data classification from satellite imagery using neural networks is considered in this paper. Several image transformations such as singular value decomposition(SVD) and wavelet packet (WP) were used ...
  • Identifying the failure-tolerant workspace boundaries of a kinematically redundant manipulator 

    Author(s):Roberts, Rodney G.; Jamisola, Rodrigo S.; Maciejewski, Anthony A.
    Date:2007
    In addition to possessing a number of other important properties, kinematically redundant manipulators are inherently more tolerant to locked-joint failures than nonredundant manipulators. However, a joint failure can still ...
  • Real-time SVD for the control of redundant robotic manipulators 

    Author(s):Maciejewski, Anthony A.
    Date:1989
    By taking advantage of the well-behaved nature of singular values and vectors, the computational expense of determining the SVD of the Jacobian matrix can be reduced to such an extent that on-line calculation becomes ...
  • Simulation of attempts to influence crowd dynamics, A 

    Author(s):Kirkland, Joel A.; Maciejewski, Anthony A.
    Date:2003
    An understanding of how to alter crowd dynamics would have a significant impact in a number of scenarios, e.g., during riots or evacuations. The social force model, where individuals are self-driven particles interacting ...
  • Analysis of eigendecomposition for sets of correlated images at different resolutions 

    Author(s):Saitwal, Kishor; Maciejewski, Anthony A.; Roberts, Rodney G.
    Date:2004
    Eigendecomposition is a common technique that is performed on sets of correlated images in a number of computer vision and robotics applications. Unfortunately, the computation of an eigendecomposition can become prohibitively ...
  • Using genetic algorithms to optimize social robot behavior for improved pedestrian flow 

    Author(s):Eldridge, Bryce D.; Maciejewski, Anthony A.
    Date:2005
    This paper expands on previous research on the effect of introducing social robots into crowded situations in order to improve pedestrian flow. In this case, a genetic algorithm is applied to find the optimal parameters ...
  • Eigendecomposition of correlated images characterized by three parameters 

    Author(s):Saitwal, Kishor; Maciejewski, Anthony A.; Roberts, Rodney G.
    Date:2006
    Most eigendecomposition algorithms operate on correlated images that are characterized by only one parameter. Hence they lack the required specifications of fully general 3D image data sets, in which the images need to be ...
  • Failure-tolerant path planning for the PA-10 robot operating amongst obstacles 

    Author(s):Jamisola, Rodrigo S.; Maciejewski, Anthony A.; Roberts, Rodney G.
    Date:2004
    This work considers kinematic failure tolerance when obstacles are present in the environment. An example is given using a fully spatial redundant robot, the seven degree-of-freedom Mitsubishi PA-10. This article addresses ...
  • Path planning strategy for kinematically redundant manipulators anticipating joint failures in the presence of obstacles, A 

    Author(s):Jamisola, Rodrigo S.; Maciejewski, Anthony A.; Roberts, Rodney G.
    Date:2003
    This work considers the failure tolerant operation of a kinematically redundant manipulator in an environment containing obstacles. In particular, the article addresses the problem of planning a collision-free path for a ...
  • Effect of spatial resolution reduction techniques on the temporal properties of video sequences, The 

    Author(s):Saitwal, Kishor; Maciejewski, Anthony A.; Roberts, Rodney G.
    Date:2005
    Singular value decomposition (SVD) is a common technique that is performed on video sequences in a number of computer vision and robotics applications. The left singular vectors represent the eigenimages, while the right ...

View more