Now showing items 66-85 of 230

    • A generalized model of flocking with steering 

      Djokam, Guy A.; Rathinam, Muruhan (2021-02-07)
      We introduce and analyze a model for the dynamics of flocking and steering of a finite number of agents. In this model, each agent's acceleration consists of flocking and steering components. The flocking component is a ...
    • A GPU Memory System Comparison for an Elliptic Test Problem 

      Wang, Yu; Gobbert, Matthias K.; Olano, Marc; Griffin, Wesley
      This paper presents GPU-based solutions to the Poisson equation with homogeneous Dirichlet boundary conditions in two spatial dimensions. This problem has well-understood behavior, but similar computation to many more ...
    • The Graph 500 Benchmark on a Medium-Size Distributed-Memory Cluster with High-Performance Interconnect 

      Angel, Jordan B.; Flores, Amy M.; Heritage, Justine S.; Wardrip, Nathan C.; Raim, Andrew M.; Gobbert, Matthias K.; Murphy, Richard C.; Mountain, David J. (2012-12-17)
      While traditional performance benchmarks for high-performance computers measure the speed of arithmetic operations, memory access time is a more useful performance gauge for many large problems today. The Graph 500 benchmark ...
    • Graph 500 Performance on a Distributed-Memory Cluster 

      Gobbert, Matthias K.; Angel, Jordan B.; Flores, Amy M.; Heritage, Justine S.; Wardrip, Nathan C.; Raim, Andrew M.; Murphy, Richard C.; Mountain, David J. (2012)
      Social network and medical informatics analysis are examples of modern computing problems that involve large data sets. These data can be represented using graphs, which are sets of vertices that are connected by edges. ...
    • A High‐Dimensional Classification Rule Using Sample Covariance Matrix Equipped With Adjusted Estimated Eigenvalues 

      Baek, Seungchul; Park, Hoyoung; Park, Junyong (Wiley Online Library, 2021-02-03)
      High‐dimensional classification have had challenges mainly due to the singularity issue of the sample covariance matrix. In this work, we propose a different approach to get a more reliable sample covariance matrix by ...
    • A Hölder type inequality and an interpolation theorem in Euclidean Jordan algebras 

      Gowda, Muddappa Seetharama (2018-09-14)
      In a Euclidean Jordan algebra V of rank n which carries the trace inner product, to each element x we associate the eigenvalue vector λ(x) whose components are the eigenvalues of x written in the decreasing order. For any ...
    • Hybrid MPI+OpenMP parallelization of image reconstruction in proton beam therapy on multi-core and many-core processors 

      Della-Giustina, James; Barajas, Carlos A.; Gobbert, Matthias K.; Mackin, Dennis S.; Polf, Jeremy
      The advantage of proton beam therapy is that the lethal dose of radiation is delivered by a sharp increase toward the end of the beam range, known as the Bragg peak (BP), with no dose delivered beyond. By using these ...
    • Identifying Nonlinear Correlations in High Dimensional Data with Application to Protein Molecular Dynamics Simulations 

      Bailey, William J.; Chambless, Claire A.; Cho, Brandynne M.; Smith, Jesse D.; Raim, Andrew M.; Adragni, Kofi P.; Thorpe, Ian F. (2013)
      Complex biomolecules such as proteins can respond to changes in their environment through a process called allostery, which plays an important role in regulating the function of these biomolecules. Allostery occurs when ...
    • IDL: A Possible Alternative to Matlab 

      Coman, Ecaterina (2012)
      Created by Exelis Visual Information Solutions, IDL (Interactive Data Language) is a commercial package used for data analysis. We compared the usability and efficiency of IDL to that of Matlab to determine if IDL is a ...
    • Impact of Calcium Store Overload and Electrical Dynamics on Cardiac Myocytes 

      Alexander, Amanda M.; DeNardo, Erin K.; Frazier III, Eric; McCauley, Michael; Rojina, Nicholas; Coulibaly, Zana; Peercy, Bradford E.; Izu, Leighton T. (2015)
      The heart's main function of pumping blood to the body is a complicated process separated into two major steps. Initially, the heart is relaxed and blood flows freely into the ventricles and atria from the veins, then the ...
    • An Implementation of Binomial Method of Option Pricing using Parallel Computing 

      Popuri, Sai K.; Raim, Andrew M.; Neerchal, Nagaraj K.; Gobbert, Matthias K.
      The Binomial method of option pricing is based on iterating over discounted option payoffs in a recursive fashion to calculate the present value of an option. Implementing the Binomial method to exploit the resources of a ...
    • Improvements to the Deep Learning Classification of Compton Camera Based Prompt Gamma Imaging for Proton Radiotherapy 

      Basalyga, Jonathan N.; Barajas, Carlos A.; Kroiz, Gerson C.; Gobbert, Matthias K.; Maggi, Paul; Polf, Jerimy (2020-05)
      Real-time imaging has potential to greatly increase the effectiveness of proton beam therapy for cancer treatment. One promising method of real-time imaging is the use of a Compton camera to detect prompt gamma rays, which ...
    • Improving the Computational Effciency of Downscaling GCM data for Use in SWAT 

      Evans, Christopher; Gartrell, Abigail; Gomez, Lauren; Mouyebe, Moise; Oxley, Darius; Popuri, Sai Kumar; Neerchal, Nagaraj K.; Mehta, Amita (2014)
      This project creates software tools to streamline the computational procedures to generate high-resolution weather parameters from low resolution Global Climate Models (GCM) to be input into the Soil and Water Assessment ...
    • Incorporating age and delay into models for biophysical systems 

      KhudaBukhsh, Wasiur R.; Kang, Hye-Won; Kenah, Eben; Rempala, Grzegorz A.
      In many biological systems, chemical reactions or changes in a physical state are assumed to occur instantaneously. For describing the dynamics of those systems, Markov models that require exponentially distributed inter-event ...
    • Individual and community-level risk for COVID-19 mortality in the United States 

      Jin, Jin; Agarwala, Neha; Kundu, Prosenjit; Harvey, Benjamin; Zhang, Yuqi; Wallace, Eliza; Chatterjee, Nilanjan (Nature, 2020-12-11)
      Reducing COVID-19 burden for populations will require equitable and effective risk-based allocations of scarce preventive resources, including vaccinations. To aid in this effort, we developed a general population risk ...
    • Inexact Methods for Symmetric Stochastic Eigenvalue Problems 

      Lee, Kookjin; Sousedík, Bedřich (2018-11-02)
      We study two inexact methods for solutions of random eigenvalue problems in the context of spectral stochastic finite elements. In particular, given a parameter-dependent, symmetric matrix operator, the methods solve for ...
    • The Influence of Stochastic Parameters on Calcium Waves in a Heart Cell 

      Brewster, Matthew W. (2013)
      Calcium is a critical component in many cellular functions. It serves many important functions such as signal transduction, contraction of muscles, enzyme function, and maintaining potential difference across excitable ...
    • Informational Requirements for Transcriptional Regulation 

      O'Neill, Patrick K.; Forder, Robert; Erill, Ivan (2014-05-01)
      Transcription factors (TFs) regulate transcription by binding to specific sites in promoter regions. Information theory provides a useful mathematical framework to analyze the binding motifs associated with TFs but imposes ...
    • Informational Requirements for Transcriptional Regulation 

      O'Neill, Patrick K.; Forder, Robert; Erill, Ivan (Mary Ann Liebert, 2014-05-01)
      Transcription factors (TFs) regulate transcription by binding to specific sites in promoter regions. Information theory provides a useful mathematical framework to analyze the binding motifs associated with TFs but imposes ...
    • Intel Concurrent Collections as a Method for Parallel Programming 

      Adjogah, Richard; Mckissack, Randal; Sibeudu, Ekene; Raim, Andrew M.; Gobbert, Matthias K.; Craymer, Loring (2011)
      Computer hardware has become parallel in order to run faster and more efficient. One of the current standard parallel coding libraries is MPI (Message Passing Interface). The Intel Corporation is developing a new parallel ...