John Goebel Portfolio

UNC Chapel Hill 2025 - Asheville, NC

About

UNC 2025 • Asheville, NC

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I’m a Biomedical Engineering senior at UNC Chapel Hill with a focus on electronics and microdevices. My interests include smart implants, tissue biomechanics, and continuous wearable sensors. Currently, I’m taking graduate-level coursework in Electrical Engineering at NC State. In my free time, I enjoy working out, cooking, hiking, and exploring new skills. My goal is to build a career as an R&D engineer who develops electronic medical technologies.

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Projects

In Progress: Laser Galvanometer, LED Filament Clock, and Microplastic Detection System.

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Senior Design Goniometer

April 2025

Patients undergoing total knee replacement surgery often lack at-home resources to monitor their knee joint angle and range of motion during physical therapy. Our electronic wearable goniometer displays the joint angle in real time on a screen with Bluetooth compatibility. My role in this project involved all electronics, including designing a fully custom battery charging and regulation circuit, USB-C 3.1 communication, power delivery triggering, latching circuits for power and angle direction mode switching, custom ESP32 microcontroller circuitry, etc.

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Building My Personal Portfolio Website

January 2025

I created this portfolio as a place to show my work and creativity. I hope to continually refine its design as I progress through my career. Building a personal portfolio has been on the back burner for the latter half of undergrad. I have no formal experience with front-end web development and wanted to challenge myself while having fun with this project during break (Winter 2025).

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Denoising 3D Magnetic Resonance Images: Implementation of Machine Learning Model

December 2024

This paper explores the application of Wasserstein-Generative Adversarial Networks (WGAN) for denoising 3D MRI scans, utilizing residual autoencoders and a custom loss function to enhance structural similarity and reduce oversmoothing. Compared to the state-of-the-art BM3D method, WGAN models show superior SSIM performance at higher noise levels, preserving structural details in MRI imaging.

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Smart Tourniquet System

December 2024

Voted Best Project in NC State Graduate ECE Course by students. The tourniquet system dynamically responds to user heart rate and pressure fluctuations along the tourniquet membrane, aiming to reduce the the risk of nerve injury. The device integrates a microcontroller, pulse oximeter, accelerometers, pressure transducer, pneumatic pump, and solenoid valves to ensure precise pressure regulation.

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A Review on the Effects of Fourier Transforms and Convolution in Image Filtering

December 2022

This review explores the roles of the Fourier Transforms (FT) and Convolution in image processing. These mathematical operations are essential for transitioning between spatial and frequency domains, facilitating widely used methods in image analysis and filtering. The theoretical foundations of FT and Convolution are presented with examples to demonstrate their use. FT's may be used for deblurring and noise reduction, particularly in removing motion blur from images underneath the presence of noise.

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Evaluating Audio, Visual, and Tactile Reaction Systems

May 2023

This project investigates reaction times (RTs) across audio, visual, and tactile stimuli, utilizing a custom-built Arduino device for measurement. The methodology involved collecting 100 RT measurements for each stimulus type from myself, comparing these with online tests and a vibration-phone-tactile test to assess variance. Results revealed mean RTs of 190.3 ms (audio), 221.1 ms (visual), and 200.5 ms (tactile), with online and vibration-phone-tactile tests showing generally higher reaction times.

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Trading Strategy for Bitcoin and Gold

April 2022

This paper, from a competition freshman year, explores the application of Autoregressive Integrated Moving Average (ARIMA), linear regression, and polynomial regression models to predict prices in volatile markets like gold and bitcoin. Our aim was to maximize returns through strategic trading actions. By leveraging standard deviation channels and exponential ratios as trading indicators, the model identifies optimal buy/sell points within a seven-day window, considering transaction costs. The results demonstrate that the ARIMA model outperforms the market, achieving a total return of $610,000—significantly exceeding the $72,000 market return without trading actions.

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Experience

Academic and Industry Experience

Spinal Simplicity – Kansas City, KS

May 2024 – December 2024

Research and Development Engineering Intern working on spinal treatments.

  • Conducted biomechanical research on a treatment to enhance mechanical stability post-disc herniation repair and spinal fusion, aiming to reduce re-herniation rates and prevent adjacent segment disease
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Biomedical Electronics Teaching Assistant – Chapel Hill, NC

August 2024 – December 2024

Led two lab sections per week for a total of 30+ students, focusing on circuit analysis, binary math, and digital circuit design. Graded homework and lab reports while providing electronics guidance during lab.

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Legant Lab (Microscopy) – Chapel Hill, NC

January 2024 – May 2024

Undergraduate Researcher utilizing Python and MATLAB for computational biophysics.

  • Developed computational algorithms for calculating particle displacements. Data was for transcription factor analysis.
  • Performed statistical assessments and modeling using Python's Pandas and NumPy libraries. Created my own Python library for analysis.
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Skills

Technical Skills and Interests