Interpolation of sparse high-dimensional data

TCH Lux, LT Watson, TH Chang, Y Hong… - Numerical …, 2021 - Springer
Increases in the quantity of available data have allowed all fields of science to generate
more accurate models of multivariate phenomena. Regression and interpolation become …

Prediction of high-performance computing input/output variability and its application to optimization for system configurations

L Xu, T Lux, T Chang, B Li, Y Hong, L Watson… - Quality …, 2021 - Taylor & Francis
Performance variability is an important measure for a reliable high performance computing
(HPC) system. Performance variability is affected by complicated interactions between …

Comparative measurement of cache {Configurations'} impacts on cache timing {Side-Channel} attacks

X Yu, Y **ao, K Cameron, DD Yao - 12th USENIX Workshop on Cyber …, 2019 - usenix.org
Time-driven and access-driven attacks are two dominant types of the timing-based cache
side-channel attacks. Despite access-driven attacks are popular in recent years …

Modeling I/O performance variability in high-performance computing systems using mixture distributions

L Xu, Y Wang, T Lux, T Chang, J Bernard, B Li… - Journal of Parallel and …, 2020 - Elsevier
Performance variability is an important factor of high-performance computing (HPC)
systems. HPC performance variability is often complex because its sources interact and are …

Algorithms and frameworks for accelerating security applications on HPC platforms

X Yu - Virginia Tech Theses, 2019 - par.nsf.gov
Typical cybersecurity solutions emphasize on achieving defense functionalities. However,
execution efficiency and scalability are equally important, especially for real-world …

Multiobjective optimization of the variability of the high-performance LINPACK solver

TH Chang, J Larson, LT Watson - 2020 Winter Simulation …, 2020 - ieeexplore.ieee.org
Variability in the execution time of computing tasks can cause load imbalance in high-
performance computing (HPC) systems. When configuring system-and application-level …

Learning-based cyber security analysis and binary customization for security

K Tian - 2018 - vtechworks.lib.vt.edu
This thesis presents machine-learning based malware detection and post-detection
rewriting techniques for mobile and web security problems. In mobile malware detection, we …

Effective nonparametric distribution modeling for distribution approximation applications

TCH Lux, LT Watson, TH Chang, L Xu… - 2020 …, 2020 - ieeexplore.ieee.org
Many fields of science rely on the collection of samples and estimation of true population
distributions from those samples. There are several effective nonparametric methods for …

Mathematical Software for Multiobjective Optimization Problems

TH Chang - 2020 - vtechworks.lib.vt.edu
In this thesis, two distinct problems in data-driven computational science are considered.
The main problem of interest is the multiobjective optimization problem, where the tradeoff …