Now showing items 207-226 of 1765

    • Broadband Absorption Engineering to Enhance Light Absorption in Monolayer MoS2 

      Bahauddin, Shah Mohammad; Robatjazi, Hossein; Thomann, Isabell (2016)
      Here we take a first step toward tackling the challenge of incomplete optical absorption in monolayers of transition metal dichalcogenides for conversion of photon energy, including solar, into other forms of energy. We ...
    • Broadband, Polarization-Sensitive Photodetector Based on Optically-Thick Films of Macroscopically Long, Dense, and Aligned Carbon Nanotubes 

      Nanot, Sebastien; Cummings, Aron W.; Pint, Cary L.; Ikeuchi, Akira; Akiho, Takafumi; Sueoka, Kazuhisa; Hauge, Robert H.; Leonard, François; Kono, Junichiro (2013)
      Increasing performance demands on photodetectors and solar cells require the development of entirely new materials and technological approaches.Wereport on the fabrication and optoelectronic characterization of a photodetector ...
    • Broadcast Detection Structures with Applications to Sensor Networks 

      Johnson, Don; Lexa, Michael (2006-03-01)
      Data broadcasting is potentially an effective and efficient way to share information in wireless sensor networks. Broadcasts offer energy savings over multiple, directed transmissions, and they provide a vehicle to exploit ...
    • Broadcast Space-Time Coding 

      Memarzadeh, Mahsa; Sabharwal, Ashutosh; Aazhang, Behnaam (2001-08-20)
      In this paper, we study transmission techniques for broadcast channels with a single transmitter and multiple receivers. The transmitter is assumed to be equipped with multiple antennas. Further, each receiver is interested ...
    • Buckminsterfullerene purification and buckminsterfullerene film characterization 

      Averitt, Richard Douglas (1994)
      A method is described which utilizes the difference in vapor pressure between C$\sb{60}$ and heavier fullerenes to produce C$\sb{60}$ powder with a purity of 99.97%. Using the material from this process allows for the ...
    • Building a map for robot path planning by fusing video images and laser rangefinder data 

      Reynolds, Steven Lamar (1993)
      This thesis describes algorithms that fuse the data from a single video camera and a laser rangefinder. By merging information from these sensors, the algorithms build a digital map of the local environment for a robot to ...
    • Bursting, beating, and chaotic modes in mathematical models of the R15 cell in Aplysia 

      Canavier, Carmen Castro (1989)
      Chaotic regimes have been observed experimentally in neurons as well as in deterministic neuronal models. The bursting R15 cell in the abdominal ganglion of Aplysia has been the subject of extensive mathematical modeling. ...
    • Cache management in scalable network servers 

      Pai, Vivek Sadananda (2000)
      For many users, the perceived speed of computing is increasingly dependent on the performance of network server systems, underscoring the need for high performance servers. Cost-effective scalable network servers can be ...
    • A Canonical Covariance Based Method for Generalized Joint Signal Representations 

      Jones, Douglas L.; Sayeed, Akbar M. (1996-04-20)
      Generalized joint signal representations extend the scope of joint time-frequency representations to a richer class of nonstationary signals. Cohen's marginal-based generalized approach is canonical from a distributional ...
    • The Capacity of Average and Peak Power Constrained Fading Channels with Channel Side Information 

      Khojastepour, Mohammad; Aazhang, Behnaam (2004-03-01)
      We derive the ergodic capacity of discrete-time fading channel with additive Gaussian noise subject to both peak and average power constraint. The average power can be interpreted as the cost that we incur to achieve a ...
    • Capacity of low power multiuser systems with antenna arrays 

      Muharemovic, Tarik (2005)
      In this thesis, we study wireless multiuser communication systems in the regime of low spectral efficiencies, where users and the multiple access point are equipped with antenna arrays. Our first contribution is to develop ...
    • CAPE - VLSI Implementation of a Systolic Processor Array: Architecture, Design and Testing 

      Hemkumar, Nariankadu D.; Kota, Kishore; Cavallaro, Joseph R. (1991-06-20)
      The SVD is an important matrix decomposition in many real-time signal processing, image processing and robotics applications. Special-purpose processor arrays can achieve significant speed-up over conventioinal architectures ...
    • Carbon nanotube fiber terahertz polarizer 

      Zubair, Ahmed; Tsentalovich, Dmitri E.; Young, Colin C.; Heimbeck, Martin S.; Everitt, Henry O.; Pasquali, Matteo; Kono, Junichiro (2016)
      Conventional, commercially available terahertz (THz) polarizers are made of uniformly and precisely spaced metallic wires. They are fragile and expensive, with performance characteristics highly reliant on wire diameters ...
    • Challenges in Computer Architecture Evaluation 

      Skadron, Kevin; Martonosi, Margaret; August, David; Hill, Mark; Lilja, David; Pai, Vijay S. (2003-08-20)
      A report to the US National Science Foundation argues that simulation and benchmarking technology will require a leap in capability within the next few years to maintain ongoing innovation in computer systems.
    • Channel equalization algorithms for MIMO downlink and ASIP architectures 

      Radosavljevic, Predrag (2004)
      Processors for mobile handsets in 3G cellular systems require: high speed, flexibility and low power dissipation. While computationally efficient, ASIC processors are often not flexible enough to support necessary variations ...
    • Channel Equalization Algorithms for MIMO Downlink and ASIP Architectures 

      Radosavljevic, Predrag (2004-04-01)
      Processors for mobile handsets in 3G cellular systems require: high speed, flexibility and low power dissipation. While computationally efficient, ASIC processors are often not flexible enough to support necessary ...
    • Channel Estimation and Signal Detection for Multi-Carrier CDMA Systems with Pulse-Shaping Filter 

      Borran, Mohammad Jaber; Varshney, Prabodh; Vilpponen, Hannu; Papadimitriou, Panayiotis (2003-05-20)
      We consider the problem of digital communication in a fading environment using the Multi-Carrier CDMA technology. By incorporating the effect of the pulse-shaping filter in the channel estimation and signal detection ...
    • Channel estimation for code division multiple access communication systems 

      Bensley, Stephen Edward (1994)
      We consider the estimation of channel parameters for code division multiple access (CDMA) communication systems operating over channels with either single or multiple propagation paths. We present two approaches for ...
    • Channel Estimation for Multirate DS-CDMA Systems 

      Sabharwal, Ashutosh; Mitra, Urbashi; Bhashyam, Srikrishna (2000-11-20)
      The problem of channel estimation for multiple data rate Direct-Sequence Code-Division Multiple-Acess (DS-CDMA) systems is addressed. The derived algorithms are suitable for both variable chipping rate and/or variable ...
    • Characterization of block memory operations 

      Calhoun, Michael (2006)
      Block memory operations are frequently performed by the operating system and consume an increasing fraction of kernel execution time. These operations include memory copies, page zeroing, interprocess communication, and ...