Now showing items 11592-11611 of 17018

    • q-Blossoming for analytic functions 

      Goldman, Ron; Simeonov, Plamen (2018)
      We construct aᅠq-analog of the blossom for analytic functions, the analyticᅠq-blossom. Thisᅠq-analog also extends the notion ofᅠq-blossoming from polynomials to analytic functions. We then apply this analyticᅠq-blossom to derive identities for analytic functions represented in terms of theᅠq-Poisson basis, includingᅠq-versions of the Marsden identity ...
    • Q493K and Q498H substitutions in Spike promote adaptation of SARS-CoV-2 in mice 

      Huang, Kun; Zhang, Yufei; Hui, Xianfeng; Zhao, Ya; Gong, Wenxiao; (2021)
      Background: An ideal animal model to study SARS-coronavirus 2 (SARS-CoV-2) pathogenesis and evaluate therapies and vaccines should reproduce SARS-CoV-2 infection and recapitulate lung disease like those seen in humans. The angiotensin-converting enzyme 2 (ACE2) is a functional receptor for SARS-CoV-2, but mice are resistant to the infection because ...
    • QEPAS based ppb-level detection of CO and N2O using a high power CW DFB-QCL 

      Ma, Yufei; Lewicki, Rafał; Razeghi, Manijeh; Tittel, Frank K. (2013-01-14)
      An ultra-sensitive and selective quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor platform was demonstrated for detection of carbon monoxide (CO) and nitrous oxide (N2O). This sensor used a stateof- the art 4.61 μm high power, continuous wave (CW), distributed feedback quantum cascade laser (DFB-QCL) operating at 10°C as the excitation source. ...
    • QoS-driven server migration for Internet data centers 

      Ranjan, Supranamaya (2002)
      Many organizations have chosen to host Internet applications at Internet Data Centers (IDCs) located near network access points of the Internet to take advantage of their high availability, large network bandwidths and low network latencies. Current IDCs provide for a dedicated and static allocation of resources to each hosted application. Unfortunately, ...
    • QRD-QLD searching based sphere detection for emerging MIMO downlink OFDM receivers 

      Radosavljevic, Predrag; Kim, Kyeong Jin; Cavallaro, Joseph R.; Center for Multimedia Communication (2008-11-01)
      In this paper, a detection algorithm with parallel partial candidate-search algorithm is presented. Two fully independent partial search processes are simultaneously employed for two groups of transmit antennas based on QR and QL decompositions of the channel matrix. Proposed QRDQLD detection algorithm is compared with well-known QRD-M scheme adopted ...
    • QUALITY OF PROGRAM INDICATORS IN UNITED STATES ARCHITECTURAL EDUCATION: A STATISTICAL SURVEY (VOLUMES I - III) 

      BURGESS, JESSE HUGH (1980)
      In May, 1976, a national survey was initiated to measure and compare the quality of 78 of 80 accredited architectural programs in the United States. Statistical data were gather to analyze, score, and rank individual programs based on eight carefully selected components: educational; environmental; fiscal, physical, and human resources; advancement; ...
    • Quantification of HIV-1 DNA using Real-Time Recombinase Polymerase Amplification 

      (2014)
      Although recombinase polymerase amplification (RPA) has many advantages for the detection of pathogenic nucleic acids in point-of-care applications, RPA has not yet been applied for has not yet been implemented to quantify sample concentration using a standard curve. Here we describe a real-time RPA assay with an internal positive control and an ...
    • Quantification of Lifeline System Interdependencies after the 27 February 2010 Mw 8.8 Offshore Maule, Chile, Earthquake 

      (2012-06)
      Data on lifeline system service restoration is seldom exploited for the calibration of performance prediction models or for response comparisons across systems and events. This study explores utility restoration curves after the 2010 Chilean earthquake through a time series method to quantify coupling strengths across lifeline systems. When consistent ...
    • Quantification of Myxococcus xanthus Aggregation and Rippling Behaviors: Deep-Learning Transformation of Phase-Contrast into Fluorescence Microscopy Images 

      Zhang, Jiangguo; Comstock, Jessica A.; Cotter, Christopher R.; Murphy, Patrick A.; Nie, Weili; (2021)
      Myxococcus xanthus bacteria are a model system for understanding pattern formation and collective cell behaviors. When starving, cells aggregate into fruiting bodies to form metabolically inert spores. During predation, cells self-organize into traveling cell-density waves termed ripples. Both phase-contrast and fluorescence microscopy are used to ...
    • Quantifying cell transitions in C. elegans with data-fitted landscape models 

      Camacho-Aguilar, Elena; Warmflash, Aryeh; Rand, David A. (2021)
      Increasing interest has emerged in new mathematical approaches that simplify the study of complex differentiation processes by formalizing Waddington’s landscape metaphor. However, a rational method to build these landscape models remains an open problem. Here we study vulval development in C. elegans by developing a framework based on Catastrophe ...
    • Quantifying cognitive resilience in Alzheimer’s Disease: The Alzheimer’s Disease Cognitive Resilience Score 

      Yao, Tianyi; Sweeney, Elizabeth; Nagorski, John; Shulman, Joshua M.; Allen, Genevera I. (2020)
      Even though there is a clear link between Alzheimer’s Disease (AD) related neuropathology and cognitive decline, numerous studies have observed that healthy cognition can exist in the presence of extensive AD pathology, a phenomenon sometimes called Cognitive Resilience (CR). To better understand and study CR, we develop the Alzheimer’s Disease ...
    • Quantifying DNA Melting Transitions Using Single-Molecule Force Spectroscopy 

      Calderon, Christopher P.; Chen, Wei-Hung; Lin, Kuan-Jiuh; Harris, Nolan C.; Kiang, Ching-Hwa (2008-09)
      We stretched a DNA molecule using atomic force microscope and quantified the mechanical properties associated withᅠBandᅠSᅠforms of double-stranded DNA (dsDNA), molten DNA, and single-stranded DNA (ssDNA). We also fit overdamped diffusion models to the AFM time series and used these models to extract additional kinetic information about the system. ...
    • Quantifying Multiscale Noise Sources in Single-Molecule Time Series 

      Calderon, Christopher P.; Harris, Nolan C.; Kiang, Ching-Hwa; Cox, Dennis D. (2008-09)
      When analyzing single-molecule data, a low-dimensional set of system observables typically serve as the observational data. We calibrate stochastic dynamical models from time series that record such observables. Numerical techniques for quantifying noise from multiple time-scales in a single trajectory, including experimental instrument and inherent ...
    • Quantifying pulmonary perfusion from noncontrast computed tomography 

      Castillo, Edward; Nair, Girish; Turner‐Lawrence, Danielle; Myziuk, Nicholas; Emerson, Scott; (2021)
      Purpose: Computed tomography (CT)-derived ventilation methods compute respiratory induced volume changes as a surrogate for pulmonary ventilation. Currently, there are no known methods to derive perfusion information from noncontrast CT. We introduce a novel CT-Perfusion (CT-P) method for computing the magnitude mass changes apparent on dynamic ...
    • Quantifying spectral changes experienced by plasmonic nanoparticles in a cellular environment to inform biomedical nanoparticle design 

      (2014)
      Metal nanoparticles (NPs) scatter and absorb light in precise, designable ways, making them agile candidates for a variety of biomedical applications. When NPs are introduced to a physiological environment and interact with cells, their physicochemical properties can change as proteins adsorb on their surface and they agglomerate within intracellular ...
    • Quantitative analysis of gas phase molecular constituents using frequency-modulated rotational spectroscopy 

      Lou, Minghe; Swearer, Dayne F.; Gottheim, Samuel; Phillips, Dane J.; Simmons, Jay G. Jr.; (2019)
      Rotational spectroscopy has been used for decades for virtually unambiguous identification of gas phase molecular species, but it has rarely been used for the quantitative analysis of molecular concentrations. Challenges have included the nontrivial reconstruction of integrated line strengths from modulated spectra, the correlation of pressure-dependent ...
    • Quantitative analysis of gas phase molecular constituents using frequency-modulated rotational spectroscopy 

      Lou, Minghe; Swearer, Dayne F.; Gottheim, Samuel; Phillips, Dane J.; Simmons, Jay G.; (2019)
      Rotational spectroscopy has been used for decades for virtually unambiguous identification of gas phase molecular species, but it has rarely been used for the quantitative analysis of molecular concentrations. Challenges have included the nontrivial reconstruction of integrated line strengths from modulated spectra, the correlation of pressure-dependent ...
    • Quantitative Analysis of High-Resolution Microendoscopic Images for Diagnosis of Esophageal Squamous Cell Carcinomaᅠ 

      Shin, Dongsuk; Protano, Marion-Anna; Polydorides, Alexandros D.; Dawsey, Sanford M.; Pierce, Mark C.; (2015)
      Background & Aims: High-resolution microendoscopy is an optical imaging technique with the potential to improve the accuracy of endoscopic screening for esophageal squamous neoplasia. Although these microscopic images can be interpreted readily by trained personnel, quantitative image analysis software could facilitate the use of this technology in ...
    • Quantitative analysis of high-resolution microendoscopic images for diagnosis of neoplasia in patients with Barrett’s esophagus 

      (2016)
      Background and Aims: Previous studies show that microendoscopic images can be interpreted visually to identify the presence of neoplasia in patients with Barrett’s esophagus (BE), but this approach is subjective and requires clinical expertise. This study describes an approach for quantitative image analysis of microendoscopic images to identify ...