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  1. No Access

    Article

    In Vivo Three-Dimensional Geometric Reconstruction of the Mouse Aortic Heart Valve

    Aortic valve (AV) disease is a common valvular lesion in the United States, present in about 5% of the population at age 65 with increasing prevalence with advancing age. While current replacement heart valves...

    Daniel P. Gramling, Aletea L. van Veldhuisen in Annals of Biomedical Engineering (2024)

  2. No Access

    Chapter and Conference Paper

    Optimizing BIT1, a Particle-in-Cell Monte Carlo Code, with OpenMP/OpenACC and GPU Acceleration

    On the path toward develo** the first fusion energy devices, plasma simulations have become indispensable tools for supporting the design and development of fusion machines. Among these critical simulation t...

    Jeremy J. Williams, Felix Liu, David Tskhakaya in Computational Science – ICCS 2024 (2024)

  3. No Access

    Chapter and Conference Paper

    Krylov Solvers for Interior Point Methods with Applications in Radiation Therapy and Support Vector Machines

    Interior point methods are widely used for different types of mathematical optimization problems. Many implementations of interior point methods in use today rely on direct linear solvers to solve systems of e...

    Felix Liu, Albin Fredriksson, Stefano Markidis in Computational Science – ICCS 2024 (2024)

  4. No Access

    Chapter and Conference Paper

    Distributed Objective Function Evaluation for Optimization of Radiation Therapy Treatment Plans

    The modern workflow for radiation therapy treatment planning involves mathematical optimization to determine optimal treatment machine parameters for each patient case. The optimization problems can be computa...

    Felix Liu, Måns I. Andersson in Parallel Processing and Applied Mathematics (2023)

  5. No Access

    Chapter and Conference Paper

    Parallel Cholesky Factorization for Banded Matrices Using OpenMP Tasks

    Cholesky factorization is a method for solving linear systems involving symmetric, positive-definite matrices, and can be an attractive choice in applications where a high degree of numerical stability is need...

    Felix Liu, Albin Fredriksson, Stefano Markidis in Euro-Par 2023: Parallel Processing (2023)

  6. Article

    Open Access

    A survey of HPC algorithms and frameworks for large-scale gradient-based nonlinear optimization

    Large-scale numerical optimization problems arise from many fields and have applications in both industrial and academic contexts. Finding solutions to such optimization problems efficiently requires algorithm...

    Felix Liu, Albin Fredriksson, Stefano Markidis in The Journal of Supercomputing (2022)

  7. Article

    Open Access

    Uncovering associations between data-driven learned qMRI biomarkers and chronic pain

    Knee pain is the most common and debilitating symptom of knee osteoarthritis (OA). While there is a perceived association between OA imaging biomarkers and pain, there are weak or conflicting findings for this...

    Alejandro G. Morales, **hee J. Lee, Francesco Caliva in Scientific Reports (2021)

  8. Article

    Open Access

    Deep learning for large scale MRI-based morphological phenoty** of osteoarthritis

    Osteoarthritis (OA) develops through heterogenous pathophysiologic pathways. As a result, no regulatory agency approved disease modifying OA drugs are available to date. Stratifying knees into MRI-based morpho...

    Nikan K. Namiri, **hee Lee, Bruno Astuto, Felix Liu, Rutwik Shah in Scientific Reports (2021)

  9. Article

    Open Access

    Bone shape mediates the relationship between sex and incident knee osteoarthritis

    Knee bone shape differs between men and women and the incidence of knee osteoarthritis (OA) is higher in women than in men. Therefore, the purpose of the present study was to determine whether the observed dif...

    Barton L. Wise, **gbo Niu, Yuqing Zhang, Felix Liu in BMC Musculoskeletal Disorders (2018)

  10. No Access

    Article

    Association of weight change with progression of meniscal intrasubstance degeneration over 48 months: Data from the Osteoarthritis Initiative

    To investigate the association of weight change over 48 months with progression of meniscal intrasubstance degeneration (MID).

    Julio Brandao Guimaraes, Michael C. Nevitt, Charles E. McCulloch in European Radiology (2018)

  11. Article

    What has imaging contributed to the epidemiological understanding of osteoarthritis?

    Pia M. Jungmann, Felix Liu, Thomas M. Link in Skeletal Radiology (2014)

  12. Article

    Open Access

    Transmurality map** of left ventricular scar: impact of spatial resoluton

    Dana C Peters, Felix Liu, Alex Tan in Journal of Cardiovascular Magnetic Resonan… (2011)