Now showing items 2550-2569 of 3781

    • Optimized integration of renewable energy technologies into Alberta's oil sands industry 

      Elsholkamia, M.; Elkamela, A.; Vargas, F.M. (2016)
      An energy optimization model for the integration of renewable technologies into the energy infrastructure of the oil sands industry is presented. The proposed model determines the optimal configuration of oil producers and ...
    • Optimized Message Passing Schedules for LDPC Decoding 

      Radosavljevic, Predrag; de Baynast, Alexandre; Cavallaro, Joseph R. (2005-11-01)
      The major drawback of the LDPC codes versus the turbo-codes is their comparative low convergence speed: 25-30 iterations vs. 8-10 iterations for turbo-codes. Recently, Hocevar showed by simulations that the convergence ...
    • Optimized Message Passing Schedules for LDPC Decoding 

      Radosavljevic, Predrag; de Baynast, Alexandre; Cavallaro, Joseph R. (2005-11-01)
      The major drawback of the LDPC codes versus the turbo-codes is their comparative low convergence speed: 25-30 iterations vs. 8-10 iterations for turbo-codes. Recently, Hocevar showed by simulations that the convergence ...
    • Optimizing binary decision systems by manipulating transmission intervals 

      Lexa, Michael; Johnson, Don (2003-07-20)
      We study the optimization of a binary decision system where quantized (soft) decisions are transmitted across an additive white Gaussian noise channel. We adjust the bit transmission intervals to maximize the Chernoff ...
    • Optimizing Energy to Minimize Errors in Approximate Ripple Carry Adders 

      Kedem, Zvi M.; Mooney, Vincent J.; Muntimadugu, Kirthi Krishna; Palem, Krishna V. (2011-07-25)
      We present a theoretical foundation and a methodology for automatically assigning supply voltages to approximate ripple carry adders in which accuracy is traded for energy consumption. The error minimization problem for a ...
    • Optimizing Fortran90D/HPF for Distributed-memory Computers 

      Roth, Gerald H. (1997-05-29)
      High Performance Fortran (HPF), as well as its predecessor FortranD, has attracted considerable attention as a promising language for writing portable parallel programs for a wide variety of distributed-memory architectures. ...
    • Optimizing modulation frequency for structured illumination in a fiber-optic microendoscope to image nuclear morphometry in columnar epithelium 

      Keahey, P.A.; Tkaczyk, T.S.; Schmeler, K.M.; Richards-Kortum, R.R. (2015)
      Fiber-optic microendoscopes have shown promise to image the changes in nuclear morphometry that accompany the development of precancerous lesions in tissue with squamous epithelium such as in the oral mucosa and cervix. ...
    • Optimizing Physical Layer Data Transmission for Minimal Signal Distortion 

      Johnson, Don; Rodriguez-Diaz, Hiram (2003-04-20)
      When transmitting a sampled signal digitally, data and error correction bits must be transmitted at least as fast as the sampling rate. Typically, each bit is allocated the same transmission time interval, which means the ...
    • Optimizing Programs over the Constructive Reals 

      Lee, Vernon A. (1998-04-08)
      A real number x is constructive if an algorithm can be given to compute arbitrarily accurate approximations to x. An efficient implementation of constructive real arithmetic could be used for prototyping numerical programs, ...
    • Optimum growth window for InAs/GaInSb superlattice materials tailored for very long wavelength infrared detection 

      Haugan, Heather J.; Brown, Gail J.; Mahalingam, Krishnamurthy; Grazulis, Larry; Noe, Gary T.; Ogden, Nathan E.; Kono, Junichiro (2014)
      The authors report growth studies to develop an InAs/GaInSb superlattice (SL) material for very long wavelength infrared detection. They select a SL structure of 47.0 Å InAs/21.5 Å Ga0.75In0.25Sb that is designed for the ...
    • Optimum Quadratic Detection and Estimation Using Generalized Joint Signal Representations 

      Sayeed, Akbar M.; Jones, Douglas L. (1996-12-01)
      Time-frequency analysis has recently undergone significant advances in two main directions: statistically optimized methods that extend the scope of time-frequency-based techniques from merely exploratory data analysis to ...
    • Optoelectronic and Ultraviolet Plasmonics 

      Knight, Mark William (2014-04-07)
      Metallodielectric nanostructures are enabling a revolution in optics. For centuries optical techniques were constrained by the diffraction limit, which prevents the control over light at the nanoscale (~200 nm or less). ...
    • Optoelectronic crystal of artificial atoms in strain-textured molybdenum disulphide 

      Li, Hong; Contryman, Alex W.; Qian, Xiaofeng; Ardakani, Sina Moeini; Gong, Yongji; Wang, Xingli; Weisse, Jeffrey M.; Lee, Chi Hwan; Zhao, Jiheng; Ajayan, Pulickel M.; Li, Ju; Manoharan, Hari C.; Zheng, Xiaolin (2015)
      The isolation of the two-dimensional semiconductor molybdenum disulphide introduced a new optically active material possessing a band gap that can be facilely tuned via elastic strain. As an atomically thin membrane with ...
    • Optoelectronic crystal of artificial atoms in strain-textured molybdenum disulphide 

      Li, Hong; Contryman, Alex W.; Qian, Xiaofeng; Ardakani, Sina Moeini; Gong, Yongji; Wang, Xingli; Weisse, Jeffrey M.; Lee, Chi Hwan; Zhao, Jiheng; Ajayan, Pulickel M.; Li, Ju; Manoharan, Hari C.; Zheng, Xiaolin (2015)
      The isolation of the two-dimensional semiconductor molybdenum disulphide introduced a new optically active material possessing a band gap that can be facilely tuned via elastic strain. As an atomically thin membrane with ...
    • Origins and solutions of proportional unfairness in IEEE 802.11 multi-hop wireless networks 

      Shi, Jingpu (2008)
      Proportional unfairness exists in multi-hop wireless networks where IEEE 802.11 is employed as the medium access control protocol. Some flows may receive very high throughput while some others may receive very low or even ...
    • Origins of the Equivalent Circuit Concept 

      Johnson, Don (2003-04-20)
      The equivalent circuit concept derives from the Superposition Principle and Ohm's Law. Two forms of the equivalent circuit, the Thevenin equivalent and the Norton equivalent, distill any linear circuit into a source and ...
    • Orthogonal Hilbert Transform Filter Banks and Wavelets 

      van Spaendonck, Rutger; Blu, Thierry; Baraniuk, Richard G.; Vetterli, Martin (2003-04-01)
      Complex wavelet transforms offer the opportunity to perform directional and coherent processing based on the local magnitude and phase of signals and images. Although denoising, segmentation, and image enhancement are ...
    • ORTHOMADS: A Deterministic MADS Instance with Orthogonal Directions 

      Abramson, Mark A.; Audet, Charles; Dennis, J.E. Jr.; Le Digabel, Sébastien (2008-02)
      The purpose of this paper is to introduce a new way of choosing directions for the Mesh Adaptive Direct Search (MADS) class of algorithms. The advantages of this new OrthoMADS instantiation of MADS are that the polling ...
    • Osteochondral tissue regeneration through polymeric delivery of DNA encoding for the SOX trio and RUNX2 

      Needham, Clark J.; Shah, Sarita R.; Dahlin, Rebecca L.; Kinard, Lucas A.; Lam, Johnny; Watson, Brendan M.; Lu, Steven; Kasper, F. Kurtis; Mikos, Antonios G. (2014)
      Native osteochondral repair is often inadequate owing to the inherent properties of the tissue, and current clinical repair strategies can result in healing with a limited lifespan and donor site morbidity. This work ...
    • Osteochondral Tissue Regeneration using a Bilayered Composite Hydrogel with Modulating Dual Growth Factor Release Kinetics in a Rabbit Model 

      Kima, Kyobum; Lama, Johnny; Lua, Steven; Spicer, Patrick P.; Lueckgena, Aline; Yasuhiko, Tabata; Wong, Mark E.; Jansen, John A.; Mikos, Antonios G.; Kasper, F. Kurtis (2014)
      Biodegradable oligo(poly(ethylene glycol) fumarate) (OPF) composite hydrogels have been investigated for the delivery of growth factors (GFs) with the aid of gelatin microparticles (GMPs) and stem cell populations for ...