§01

Education

Ph.D. and M.S. in Electrical & Computer Engineering

University of Delaware
Jan 2022 — Present

Research focus — Enhancement of remote sensing imaging systems with Generative AI.

Bachelor of Computer Engineering

Universidad de La Sabana
Jan 2017 — Dec 2021

Full merit scholarship · Sabana Herons humanoid robotics team lead.

§02

Awards & recognition

2026

Doctoral Excellence Fellowship

Awarded by the University of Delaware Graduate College for outstanding contributions to scholarship, teaching, and international mentorship, reflecting a sustained commitment to research excellence and community impact.

2020

Distinguished Student Award

Recognized for outstanding academic achievement, ranking among the highest GPAs in the program, with exceptional performance in extracurricular activities.

2019

RoboCup SPL — Runner-up Recognition

Research on genetic-algorithm-tuned defensive strategies recognized by the RoboCup Committee.

2017

Full Scholarship for Undergraduate Studies

Merit-based, tuition + stipend, awarded for exceptional performance in the Colombian national exam (ICFES).

§03

Experience

// 5+ years across academia & industry

Research Assistant

University of Delaware · NASA collaboration
Jan 2022 — Present
  • Designed and implemented multimodal Vision Transformers and Diffusion Models, increasing the 3D resolution of imaging products captured by NASA missions by up to 18×.
  • Reduced Satellite LiDAR simulation time by 92% via KD-Tree querying in 3D point clouds.
  • Built a simulation platform generating diverse, configurable, high-quality datasets for Satellite LiDAR research.

Teaching Assistant

University of Delaware
Jan 2023 — Present
  • Teaching assistant for graduate-level Statistical Learning and Imaging and Deep Learning.
  • Responsible for teaching, tutoring, and grading.

Software Engineer Intern

Universidad de La Sabana
Apr 2020 — Jun 2021
  • Developed an anomaly detection system for time-series physiological data, ensuring reliable performance of medical devices.
  • Supported validation of the system by the Colombian medical court.

Humanoid Robotics Researcher

Universidad de La Sabana — Sabana Herons Team
Apr 2018 — Jan 2020
  • Developed genetic algorithms for the NAO humanoid platform, contributing to a runner-up finish at RoboCup SPL.
  • Led the Sabana Herons Team in one of the world's most prestigious robotics competitions.
§04

Skills & Tech Stack

// what i build with
research
Generative AI Deep Learning Vision Transformers Diffusion Models LLMs NLP Remote Sensing LiDAR
languages
Python C++ C JavaScript Rust MATLAB SQL
frameworks
PyTorch JAX TensorFlow HuggingFace Lightning scikit-learn NumPy Pandas
tooling
CUDA Docker Slurm Git Linux AWS Weights & Biases
§05

Publications

// 7 papers

Toward Submeter Satellite Surface Topography and Vegetation Mapping Using LiDAR/RGB Constrained Generative Diffusion

IEEE Transactions on Geoscience and Remote Sensing, vol. 63, pp. 1–14, Art. no. 5706114 · doi:10.1109/TGRS.2025.3627143
N. Porras-Diaz; A. Ramirez-Jaime; G. R. Arce; M. Stephen
doi 2025

Denoising and Super-Resolution of Satellite Lidars Using Diffusion Generative Models

2025 IEEE Statistical Signal Processing Workshop (SSP), Edinburgh, United Kingdom, pp. 1–5 · doi:10.1109/SSP64130.2025.11073328
A. Ramirez-Jaime; N. Porras-Diaz; G. R. Arce; M. Stephen
doi 2025

Generative Diffusion Models for Compressed Sensing of Satellite LiDAR Data: Evaluating Image Quality Metrics in Forest Landscape Reconstruction

Remote Sensing, vol. 17, no. 7, 1215 · doi:10.3390/rs17071215
A. Ramirez-Jaime; G. R. Arce; N. Porras-Diaz; O. Ieremeiev; A. Rubel; V. Lukin; M. Kopytek; P. Lech; J. Fastowicz; K. Okarma
doi 2025

Transformer End-to-End Optimization of Compressive LiDARs Using Imaging Spectroscopy Side Information

IEEE Transactions on Geoscience and Remote Sensing, vol. 62, pp. 1–17 · doi:10.1109/TGRS.2024.3401614
Nestor Porras-Diaz; Andres Ramirez-Jaime; Gonzalo R. Arce; Karelia Pena-Pena; David Harding; Mark Stephen
doi 2024

Multi-Modal Transformer for Compressive LiDARs Using Hyperspectral Imaging Side-Information

IGARSS 2024 — IEEE Intl. Geoscience & Remote Sensing Symposium, Athens, Greece · doi:10.1109/IGARSS53475.2024.10641449
N. Porras-Diaz; A. Ramirez-Jaime; G. R. Arce; R. Vargas; D. Harding; M. Stephen
doi 2024

Super-Resolution of Satellite Lidars for Forest Studies Via Generative Adversarial Networks

IGARSS 2024 — IEEE Intl. Geoscience & Remote Sensing Symposium, Athens, Greece · doi:10.1109/IGARSS53475.2024.10641698
A. Ramirez-Jaime; N. Porras-Diaz; G. R. Arce; D. Harding; M. Stephen; J. MacKinnon
doi 2024

High altitude computational Lidar emulation and machine learning reconstruction for Earth sciences

Proc. SPIE 13036, Big Data VI: Learning, Analytics, and Applications, 1303606 · doi:10.1117/12.3025299
Gonzalo R. Arce; Andres Ramirez-Jaime; Nestor Porras-Diaz
doi 2024
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Languages

Spanishnative
EnglishC1 · professional
GermanA2 · basic
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