python

Lawrence Livermore National Lab

Lawrence Livermore National Lab
This is where I currently work. I originally interned at LLNL over the summer of 2017, and joined part-time during university to support the software side of the project longer-term. I am continuing to develop vision algorithms for scientific measurements, but I am also working on streamlining our team’s workflow by using the latest workflow automation tools like Dagster.
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Evaluation of ASR in Musical Environments

Evaluation of ASR in Musical Environments
ASR is used heavily in eyes-busy or hands-busy situations and often time the user may be speaking over noise. My peers and I are particularly interested in how music effects ASR decoding. We use several music datasets of varied genre or broken-down instrumentation to allow us to perform in-depth anaysis of how different aspects of music influences speech recognizer’s performance. We then train a new model from what we have learned to see if we could improve the original model’s performance.
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Embedded LS-PIV for Measuring Stream Flows

Embedded LS-PIV for Measuring Stream Flows
The USGS measures stream flows since they are critical for long-term tracking and modeling/forecasting to ensure that federal water priorities and responsibilities can be met and that the nation’s rivers canbe effectively managed. Recently, the USGS has been looking at non-contact methods of collection this data which would allow USGS scientists to gather data more safely and possibly without even going in to the field. One such method is large-scale particle image velocimetry (LS-PIV). LS-PIV is a special case of algorithms that perform optical flow; at its is a cross correlation operation which is expensive in both time complexity and energy usage. My peers and I optimize the PIV algorithm to run on a 32-bit embedded microcontroller that can quickly and accurately perform the PIV computation and have a battery life of up to 2 years.
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Denoising EEG Signals

EEGs are extremely interesting to the signal processing world as the signals from them are high dimensional and localized spatially, spectrally, and temporally. These signals are extremely low amplitude and artifacts appear in the measured signal due to normal human processes like blinking, breathing, and moving; or noise can appear due to the external factors such as line noise or sound in the room. My peers and I implement Viola’s ICA CorrMap procedure to denoise EEGs, but rather than retreiving EEG artifacts in-situ, we use Cho’s EEG dataset which separately records subjects in both rest states and performing various ‘noisy’ actions prior to a motor imagery trial. We use this data to try and denoise signals and try to devise a way to create a generalized artifact template that can be transferred from user to user.
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Autonomous Navigation System for Mapping & Traversing Rugged Terrain

The Northrop Grumman Collaboration Project (NGCP) is a project-club at Cal Poly that participates in engineering challenges posed by Northrop Grumman. The collaboration project is with Northrop Grumman, in addition to Cal Poly Pomona with whom the work for the engineering challenge is split with. The 2019 school year had a new mission which was a rugged-terrain rescue mission. My peers and I were tasked with with sensing and intelligence for one of their new vehicles.
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Lawrence Livermore National Laboratory

Lawrence Livermore National Laboratory
I interned at LLNL working on the Film Scanning and Re-Analysis Project. My research project was to design a semi-automated image processing pipeline to measure the size of the shockwave from a nuclear blast. The pipeline I developed provides was developed in Python using the OpenCV library and can detect and accurately measure the shockwave and fireball with minimal user input.
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