Now showing items 1326-1345 of 2796

    • Laser-assisted metalorganic chemical vapor deposition of zinc sulfide 

      Stokes, Scott Wilson (1997)
      Laser-assisted metalorganic chemical vapor deposition (MOCVD) was used to grow crystalline zinc sulfide at temperatures as low as 200$\sp\circ$C. The metalorganic sources, dimethylzinc and diethylsulfide, were photodissociated ...
    • Laser-induced porous graphene films from commercial polymers 

      Lin, Jian; Peng, Zhiwei; Liu, Yuanyue; Ruiz-Zepeda, Francisco; Ye, Ruquan; Samuel, Errol L.G.; Yacaman, Miguel Jose; Yakobson, Boris I.; Tour, James M. (2014)
      The cost effective synthesis and patterning of carbon nanomaterials is a challenge in electronic and energy storage devices. Here we report a one-step, scalable approach for producing and patterning porous graphene films ...
    • A Lateral Flow Assay for Quantitative Detection of Amplified HIV-1 RNA 

      Rohrman, Brittany A.; Leautaud, Veronica; Molyneux, Elizabeth; Richards-Kortum, Rebecca R. (2012)
      Although the accessibility of HIV treatment in developing nations has increased dramatically over the past decade, viral load testing to monitor the response of patients receiving therapy is often unavailable. Existing ...
    • Lattice Algorithms for Compression Color Space Estimation in JPEG Images 

      Neelamani, Ramesh; de Queiroz, Ricardo; Baraniuk, Richard G. (2001-08-01)
      JPEG (Joint Photographic Experts Group) is an international standard to compress and store digital color images [5]. Given a color image that was previously JPEG-compressed in some hidden color space, we aim to estimate ...
    • Lattice model of oligonucleotide hybridization in solution. II. Specificity and cooperativity 

      Araque, J.C.; Robert, M.A. (2016)
      Because oligonucleotides are short sequences of nucleic acid bases, their association in solution with complementary strands (hybridization) is often seen to conform to a simple two-state model. However, experimental ...
    • Layered Dynamic Fault Detection and Tolerance for Robots 

      Visinsky, Monica L.; Walker, Ian D.; Cavallaro, Joseph R. (1993-05-01)
      Fault tolerance is increasingly important for space and hazardous environment robotics. Robots need to quickly detect and tolerate internal failures in order to continue performing their tasks without the need for immediate ...
    • Lazy Release Consistency for Distributed Shared Memory 

      Keleher, Peter (1995-01)
      A software distributed shared memory (DSM) system allows shared memory parallel programs to execute on networks of workstations. This thesis presents a new class of protocols that has lower communication requirements than ...
    • LDPC Code Design for Half-Duplex Decode-and-Forward Relaying 

      Chakrabarti, Arnab; de Baynast, Alexandre; Sabharwal, Ashutosh; Aazhang, Behnaam (2005-09-01)
      We propose LDPC code designs for the half-duplex relay channel. Our designs mimic the information theoretic random coding scheme for decode-and-forward relaying. An important advantage of our scheme is that it is built ...
    • LDPC Code Design for OFDM Channel: Graph Connectivity and Information Bits Positioning 

      de Baynast, Alexandre; Sabharwal, Ashutosh; Aazhang, Behnaam (2005-07-01)
      We present an optimized channel coding scheme for OFDM transmission. In the future wireless standards such IEEE 802.11n, frame error rates (FER) as low as 0.0001 are targeting. Irregular LDPC codes have excellent performance ...
    • LDPC Code Design for Relay Channel in Time-Division mode 

      de Baynast, Alexandre; Chakrabarti, Arnab; Sabharwal, Ashutosh; Aazhang, Behnaam (2006-06-01)
      We address the problem of LDPC code design for relay channel in time-division mode based on a distributed strategy: In the first time slot, the source transmits part of the codeword. The relay and the destination receive ...
    • LDPC Code-Design for the Relay Channel 

      Chakrabarti, Arnab; de Baynast, Alexandre; Sabharwal, Ashutosh; Aazhang, Behnaam (2006-06-01)
      We propose LDPC code designs for the half-duplex relay channel. Our designs are derived from the information theoretic random coding scheme for decode-and-forward relaying. An important advantage of our scheme is that it ...
    • LDPC Code-Design for the Relay Channel 

      Chakrabarti, Arnab; de Baynast, Alexandre; Sabharwal, Ashutosh; Aazhang, Behnaam (2006-02-01)
      We propose LDPC code designs for the half-duplex relay channel. Our designs are derived from the information theoretic random coding scheme for decode-and-forward relaying. An important advantage of our scheme is that it ...
    • Leaky Buffer: A Novel Abstraction for Relieving Memory Pressure form Cluster Data Processing Frameworks 

      Liu, Zhaolei; Ng, T. S. Eugene (2016-03-25)
      The shift to the in-memory data processing paradigm has had a major influence on the development of cluster data processing frameworks. Numerous frameworks from the industry, open source community and academia are adopting ...
    • Learning minimum volume sets with support vector machines 

      Davenport, Mark A.; Baraniuk, Richard G.; Scott, Clayton D. (2006-09-01)
      Given a probability law P on d-dimensional Euclidean space, the minimum volume set (MV-set) with mass beta , 0 < beta < 1, is the set with smallest volume enclosing a probability mass of at least beta. We examine the use ...
    • Least square digital filter design in the frequency domain 

      Soewito, Atmadji Wiseso (1991)
      This thesis develops new methods for obtaining optimal frequency domain approximation in the design of digital filters. The approach uses a squared error approximation criterion and allows a transition band in the desired ...
    • Lenslet array tunable snapshot imaging spectrometer (LATIS) for hyperspectral fluorescence microscopy 

      Dwight, Jason G.; Tkaczyk, Tomasz S. (2017)
      Snapshot hyperspectral imaging augments pixel dwell time and acquisition speeds over existing scanning systems, making it a powerful tool for fluorescence microscopy. While most snapshot systems contain fixed datacube ...
    • Leveraging synthetic biology for tissue engineering applications 

      Lee, Esther J.; Tabor, Jeffrey J.; Mikos, Antonios G. (2014)
      Restoration of damaged tissues and organs requires precise control of cellular processes at the molecular level. Synthetic biology offers genetic tools that can be used to program the molecular biology of the cell, thereby ...
    • Levetiracetam mitigates doxorubicin-induced DNA and synaptic damage in neurons 

      Manchon, Jose Felix Moruno; Dabaghian, Yuri; Uzor, Ndidi-Ese; Kesler, Shelli R.; Wefel, Jeffrey S.; Tsvetkov, Andrey S. (2016)
      Neurotoxicity may occur in cancer patients and survivors during or after chemotherapy. Cognitive deficits associated with neurotoxicity can be subtle or disabling and frequently include disturbances in memory, attention, ...
    • Lifetime Optimization Using Energy Allocation in Wireless Ad-hoc Networks 

      Koushanfar, Farinaz; Shamsi, Davood (2008-02-12)
      We develop energy-balancing strategies for wireless ad-hoc networks energy resource allocation and deployment. The objective is to extend the network lifetime. We find the amount of energy storage that each node requires ...
    • Lifting Construction of Non-Linear Wavelet Transforms 

      Claypoole, Roger L.; Baraniuk, Richard G.; Nowak, Robert David (1998-10-01)
      This paper analyzes non-linear wavelet transforms using the lifting construction. The lifting construction exploits a spatial-domain, prediction-error interpretation of the wavelet transform and provides a powerful framework ...