PhD in Information Systems (AI/ML) · UMBC · Baltimore, MD

Zahid
Hassan
Tushar

Building foundation models that make Earth observation more efficient.

Zahid Hassan Tushar
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01

About

I completed my PhD in Information Systems (AI/ML) at the University of Maryland, Baltimore County, where I worked at the intersection of foundation models, geospatial intelligence, and trustworthy AI.

My research develops parameter-efficient, physics-informed architectures for high-dimensional satellite data — with applications in atmospheric cloud and aerosol property retrieval from NASA's PACE mission. I am actively seeking Postdoctoral and Assistant Professor positions starting 2026.

Foundation Models Generative AI Self-Supervised Learning Multimodal Learning Remote Sensing Trustworthy AI Medical Imaging Representation Learning

Education

2022–2026
PhD, Information Systems (AI/ML) University of Maryland Baltimore County, USA Thesis: Advanced AI Techniques for Atmospheric Cloud and Aerosol Properties Retrievals from Satellite Observations
2022–2024
MS, Information Systems (AI/ML) University of Maryland Baltimore County, USA
2019–2021
MS, Image Processing & Computer Vision (Erasmus Mundus) University of Bordeaux · Univ. Autónoma de Madrid · Pázmány Péter Catholic University
2013–2017
BS, Electrical, Electronic & Communication Engineering Military Institute of Science and Technology, Bangladesh
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Research

Trustworthy AI · Security

Security of Biomedical LLMs

Surveying threats, defenses, and open challenges in the security landscape of large language models applied to biomedical domains.

HotSoS 2026
Federated Learning · NLP

Adversarial Federated Learning for ASR

Investigated robustness of federated learning under adversarial attacks for automatic speech recognition, studying privacy risks in distributed model training.

ARL Collaboration
Self-Supervised Learning · Medical Imaging

SSL for Medical Image Classification

Built a self-supervised framework for skin cancer classification and designed explainable AI methods to interpret CNN representations and decision patterns.

UAM VPU Lab
Open Source · NASA ACCESS

NASA Research Software Contribution

Contributor to NASA-funded open-source research software for operational satellite analytics, with packages released through the NASA ACCESS program.

Technical Skills

ML & AI

PyTorch · GANs · Diffusion Models · Transformers · CNNs · UNets · LLMs · Self-Supervised Learning · Foundation Models · Explainable AI

Statistical Learning

Regression · Classification · Regularization · Model Selection · Bias-Variance Tradeoff · Evaluation Metrics

Scientific Computing

High-Dimensional Data Modeling · Multimodal Data Fusion · Representation Learning · HPC Clusters · Multi-GPU Training

Infrastructure

GitHub · Reproducible Pipelines · NASA ACCESS Program · Open-Source Research Software

03

Publications

2026
CVPR 2026 (Findings)

HyperFM: An Efficient Hyperspectral Foundation Model with Spectral Grouping

Zahid Hassan Tushar, Sanjay Purushotham

2026
IGARSS 2026

Foundation AI Models for Aerosol Optical Depth Estimation from PACE Satellite Data

Zahid Hassan Tushar, Sanjay Purushotham

2026
HotSoS 2026

Security of Biomedical Large Language Models: Threats, Defenses, and Open Challenges

Zahid Hassan Tushar, Sanjay Purushotham

2025
ICIP 2025

Cloud Optical Thickness Retrievals Using Angle Invariant Attention Based Deep Learning Models

Zahid Hassan Tushar, Adeleke Ademakinwa, Jianwu Wang, Zhibo Zhang, Sanjay Purushotham

2025
IGARSS 2025

Joint Cloud Optical Thickness and Cloud Effective Radius Property Retrievals Using Attention-Based Deep Learning Models

Zahid Hassan Tushar, Adeleke Ademakinwa, Jianwu Wang, Zhibo Zhang, Sanjay Purushotham

2025
EGUsphere

Impacts of the Three-Dimensional Radiative Effects on Cloud Droplet Number Concentration Retrieval and Aerosol Cloud Interaction Analysis

Adeleke Ademakinwa, Zhibo Zhang, Daniel Miller, Kerry Meyer, Steven Platnick, Zahid H. Tushar, Sanjay Purushotham, Jianwu Wang

2024
IGARSS 2024

CloudUNet: Adapting UNet for Retrieving Cloud Properties

Zahid Hassan Tushar, Adeleke Ademakinwa, Jianwu Wang, Zhibo Zhang, Sanjay Purushotham

2024
Atmospheric Chemistry and Physics

Influence of Cloud Retrieval Errors due to Three-Dimensional Radiative Effects on Calculations of Broadband Shortwave Cloud Radiative Effect

Adeleke S. Ademakinwa, Zahid Hassan Tushar, Jianyu Zheng, et al.

2021
ICEEICT 2021

Interpreting and Comparing Convolutional Neural Networks: A Quantitative Approach

Zahid Hassan Tushar*, M. M. Islam*

Selected Posters & Talks

  • CVPR Workshop 2025 View-Invariant Cloud-Attention Network for Retrieval of Atmospheric Cloud Microphysical Properties
  • AGU 2024 Joint Cloud Optical Thickness and Cloud Effective Radius Retrievals Using Attention-Based Deep Learning
  • AGU 2024 Influence of Three-Dimensional Radiative Effects on Cloud Droplet Number Concentration Retrievals
  • AMS 2024 Radiative Closure Studies of How Cloud Property Retrieval Errors Influence Broadband Cloud Radiative Effects
  • ARL 2022 A Study of Federated Adversarial Learning for Automatic Speech Recognition
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Teaching & Service

Teaching Interests

Generative AI · Machine Learning · Data Science · Deep Learning · Data Visualization · Python Programming · AI for Scientific Discovery · Trustworthy AI · Federated Learning

Past Teaching (MIST, 2017–2019)

Signals & Systems · Electronic Engineering · Electrical Machines · Digital Signal Processing Lab · Communication Systems Lab · Digital Electronics Lab

Mentoring

Mentored undergraduate and K–12 students in AI research projects at UMBC. Supervised laboratory instruction and undergraduate research at MIST.

Awards & Grants

  • 🏆 UMBC COEIT Summer Project Award 2025 ($5,000)
  • 🏆 Doctoral Poster Award, COEIT Research Day 2024 & 2025
  • ✈ IGARSS Travel Grant 2025
  • ✈ UMBC IS Travel Grants 2024, 2025
  • ✈ UMBC GSA Professional Development Grants 2024, 2025
  • 🎓 Erasmus Mundus Joint Master's Scholarship 2019–2021
  • 🥇 MIST Medal for Academic Excellence 2016
05

Projects

LLM · PDF · Open Source

PDF Information Extractor

Extract information from PDF files, store as JSON/YAML, and chat about the content using a free local LLM — no API key required.

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Get in Touch

I am actively seeking Postdoctoral and Assistant Professor positions starting 2026. I welcome inquiries about research collaborations, speaking invitations, and faculty opportunities.

Current Position

PhD

University of Maryland Baltimore County

Department of Information Systems

Advisor

Prof. Sanjay Purushotham

Graduation

Fall 2026