Now showing items 565-584 of 1832


  • Fault Detection and Fault Tolerance in Robotics 

    Visinsky, Monica L.; Walker, Ian D.; Cavallaro, Joseph R. (1991-07-01)
    Robots are used in inaccessible or hazardous environments in order to alleviate some of the time, cost and risk involved in preparing men to endure these conditions. In order to perform their expected tasks, the robots ...
  • Fault Detection and Fault Tolerance Methods for Robotics 

    Visinsky, Monica L. (1991-12-20)
    Fault tolerance is increasingly important in modern autonomous or industrial robots. The ability to detect and tolerate failures allows robots to effectively cope with internal failures and continue performing designated ...
  • Fault Residual Generation via Nonlinear Analytical Redundancy 

    Leuschen, Martin L.; Walker, Ian D.; Cavallaro, Joseph R. (2005-05-01)
    Fault detection is critical in many applications, and analytical redundancy (AR) has been the key underlying tool for many approaches to fault detection. However, the conventional AR approach is formally limited to linear ...
  • Fault Tolerant Algorithms and Architectures for Robotics 

    Hamilton, D. L.; Visinsky, Monica L.; Bennett, J. K.; Cavallaro, Joseph R.; Walker, Ian D. (1994-04-01)
    As robot tasks in space, nuclear, and medical environments become more widespread, the issues of reliability and safety for robots are becoming more critical. Attempts to address these issues have resulted in a a recent ...
  • Fault-Tolerant VLSI Processor Array for the SVD 

    Cavallaro, Joseph R.; Near, Christopher D.; Uyar, M. Umit (1989-10-01)
    Dynamic reconfiguration techniques are presented for a two-dimensional systolic array for the SVD of a matrix. Extra computation time is not required, since idle time inherent in the array is exploited. The scheme does not ...
  • Feature Extraction Techniques for Classification and Identification of Spectral Signatures 

    de Figueiredo, Rui J.P. (1976-04-20)
    Some of the results obtained at Rice University on the extraction of features from spectral signatures for the purpose of classifying and identifying these signatures are described.
  • Feedback gain in Multiple Antenna Systems 

    Bhashyam, Srikrishna; Sabharwal, Ashutosh; Aazhang, Behnaam (2002-05-20)
    Multiple antenna transmission and reception have been shown to significantly increase the achievable data rates of wireless systems. However, most of the existing analysis assumes perfect or no channel information at the ...
  • Feedback in multiple antenna systems: Bounds, design criterion and construction 

    Mukkavilli, Krishna Kiran (2004)
    In this thesis, we study wireless communication systems equipped with multiple antennas at the transmitter and the receiver. In particular, we investigate the design and performance analysis of transmission schemes when ...
  • Fermi-edge superfluorescence from a quantum-degenerate electron-hole gas 

    Kim, Ji-Hee; Noe, G. Timothy II; McGill, Stephen A.; Wang, Yongrui; Wojcik, Aleksander K.; Belyanin, Alexey A.; Kono, Junichiro (2013)
    Nonequilibrium can be a source of order. This rather counterintuitive statement has been proven to be true through a variety of fluctuation-driven, self-organization behaviors exhibited by out-of-equilibrium, many-body ...
  • FFT-Accelerated Iterative MIMO Chip Equalizer Architecture For CDMA Downlink 

    Guo, Yuanbin; McCain, Dennis; Cavallaro, Joseph R. (2005-03-01)
    In this paper, we present a novel FFT-accelerated iterative Linear MMSE chip equalizer in the MIMO CDMA downlink receiver. The reversed form time-domain matrix multiplication in the Conjugate Gradient iteration is accelerated ...
  • Fibulin-2 Is a Driver of Malignant Progression in Lung Adenocarcinoma 

    Baird, Brandi N.; Schliekelman, Mark J.; Ahn, Young-Ho; Chen, Yulong; Roybal, Jonathon D.; Gill, Bartley J.; Mishra, Dhruva K.; Erez, Baruch; O’Reilly, Michael; Yang, Yanan; Patel, Mayuri; Liu, Xin; Thilaganathan, Nishan; Larina, Irina V.; Dickinson, Mary E.; West, Jennifer L.; Gibbons, Don L.; Liu, Diane D.; Kim, Min P.; Hicks, John M.; Wistuba, Ignacio I.; Hanash, Samir M.; Kurie, Jonathan M. (2013-06-10)
    The extracellular matrix of epithelial tumors undergoes structural remodeling during periods of uncontrolled growth, creating regional heterogeneity and torsional stress. How matrix integrity is maintained in the face ...
  • Filtering Deterministic Layer Effects in Imaging 

    Borcea, L.; del Cueto, F. Gonzalez; Papanicolaou, G.; Tsogka, C. (2012)
    Sensor array imaging arises in applications such as nondestructive evaluation of materials with ultrasonic waves, seismic exploration, and radar. The sensors probe a medium with signals and record the resulting echoes, ...
  • Finite Backlog Effects on Downlink Scheduling 

    Ahmed, Nasir; Khojastepour, Mohammad; Sabharwal, Ashutosh; Aazhang, Behnaam (2003-11-20)
    In a multi-user downlink system, the use of channel estimates in the scheduling process can significantly improve the spectral efficiency. Recent work has shown that from a sum rate capacity standpoint, and assuming infinite ...
  • Finite element analysis of the use of temperature feedback for control of laser coagulation in biological tissue 

    Glenn, Tami Neal (1994)
    Study of thermal damage processes in laser irradiated tissue can provide further insight into the determination of optimal coagulation procedures. Arrhenius rate thermal damage processes are sensitive to tissue damage ...
  • Finite Memory-length Linear Multiuser detection for Asyncchronous Communications 

    Juntti, Markku J.; Aazhang, Behnaam (1997-05-20)
    Decorrelating, linear, minimum mean-squared error (LMMSE), and noise-whitening multiuser detectors for code-division multiple-access systems (CDMA) are ideally infinite memory-length (referred to as IIR) detectors. To ...
  • Finite memory-length linear multiuser detection for asynchronous CDMA communications 

    Juntti, Markku J.; Aazhang, Behnaam (1997-10-20)
    Decorrelating, linear, minimum mean-squared error (LMMSE), and noise-whitening multiuser detectors for code-division multiple-access systems (CDMA) are ideally infinite memory-length (referred to as IIR) detectors. To ...
  • Finite Rate Feedback Design for Multiple Transmit Antennas 

    Mukkavilli, Krishna Kiran; Sabharwal, Ashutosh; Aazhang, Behnaam (2002-10-20)
    Many practical systems employ a feedback channel to convey the channel state information to the transmitter.The capacity of the feedback channels is usually limited to a few bits per frame. We design feedback based ...
  • Fixed Point Error Analysis Of Multiuser Detection and Synchronization Algorithms For CDMA Communication Systems 

    Sengupta, Chaitali; Das, Suman; Cavallaro, Joseph R.; Aazhang, Behnaam (1998-04-20)
    Conventional correlation based single-user techniques for Direct Sequence Code Division Multiple Access (DS-CDMA) wireless communication systems are susceptible to performance degradation due to interference from other ...
  • Flex-Sphere: An FPGA Configurable Sort-Free Sphere Detector For Multi-user MIMO Wireless Systems 

    Amiri, Kiarash; Dick, Chris; Rao, Raghu; Cavallaro, Joseph R. (2008-10-01)
    Spatial division multiplexing (SDM) in MIMO technology significantly increases the spectral efficiency, and hence capacity, of a wireless communication system: it is a core component of the next generation wireless systems, ...