Ali Rahimian ak811

Hi. My name is Ali Rahimian, and these are some highlights from my CV:

Selected Repositories

Fibottention – Wythoff/Fibonacci sparse attention cutting ViT self-attention from $O(N^2)$ to $O(N \log N)$
TruthLens – Training-free deepfake data verification via VQA-style probing of vision-language models; ICML 2025
Sparxiv – Spark recommender over 3M+ arXiv papers: Parquet ETL, MLlib TF-IDF, CSR top-k search
CTRL – Cross-task RL with PPO transfer, Reptile meta-learning, and EWC continual learning
Jaga – A Java game development framework for Android

Machine Learning and Efficient Transformer Models

sparse-attention-benchmark-suite – Sparse attention for ViTs at ~2% of dense FLOPs, benchmarked across 10 mechanisms
vgg-magnitude-pruning – PyTorch implementation of Han et al. magnitude pruning on VGG
linear-quantization-from-scratch – Linear quantization in PyTorch from first principles, down to int8 multiply + int32 accumulate
transformer-encoder-from-scratch – Transformer encoder in PyTorch, built up from scaled dot-product attention to a full stack
accelerated-gradient-methods – Accelerated gradient methods: Momentum, Nesterov, and when theory misbehaves
gradient-descent-convergence – Gradient descent variants compared across quadratic, nonconvex, and least-squares tasks
closed-form-ridge-regression – Ridge vs. OLS via normal equations: log-spaced λ sweep with pairwise interaction features
logistic-regression-naive-bayes – Multiclass logistic regression (GD/IRLS) and Gaussian/Bernoulli Naive Bayes from scratch
nonlinear-2d-classifier – Two-layer classifier from scratch: manual backprop, gradient checks, nonlinear 2D boundaries
genetic-simulated-annealing-optimization – Genetic & simulated annealing optimization

Computer Vision & Deep Learning

watershed-image-segmentation – Image segmentation with Watershed algorithm
oneshot-openclip-tta – One-Shot Classification with OpenCLIP + Test-Time Prototype Adaptation
moco-joint-ssl-training – SSL-First Image Classification (MoCo + Joint Optimization)
vit-transfer-learning-pipeline – Transfer Learning for Maximum Accuracy: ViT Fine-Tuning Pipeline
mnist-simplenet-pytorch – MNIST SimpleNet with PyTorch
opencv-tracking-algorithms – Real-time tracking (CAMShift, Lucas-Kanade, KCF, etc.)
realtime-facial-keypoint-detection – Real-time keypoint detection (face, eyes, edges)
hand-segmentation-convex-hull – Hand segmentation & finger counting with convex hull
keras-cnn-classifier – CNN for image classification (TensorFlow/Keras, MNIST)

Deep Reinforcement Learning & Game Theory

carracing-ppo – CarRacing PPO (Gymnasium + Stable-Baselines3)
pong-dqn – Pong DQN: Deep Q-Learning on Atari Pong
frozenlake-qlearning – FrozenLake Q-Learning
lunarlander-ppo – LunarLander Proximal Policy Optimization
lunarlander-dqn-per-noise – LunarLander DQN: Prioritized Replay + Parameter Noise
pacman-pathfinding – Pac-Man RL agent with BFS/DFS/A* heuristics
alpha-beta-pruning – Optimal decision-making with minimax pruning

Distributed & Cloud Computing

aws-serverless-data-analytics-pipeline – AWS Serverless Data Analytics Pipeline
aws-ecommerce-analytics-s3-glue-athena-pipeline – AWS E-Commerce Analytics Pipeline (S3 • Glue • Athena)
spark-structured-streaming – Ride Sharing Analytics Using Spark Structured Streaming & Spark SQL
spark-music-streaming-analysis – Music Streaming Analysis Using Spark Structured APIs
jaccard-mapreduce – Jaccard Similarity with Hadoop MapReduce

Parallel Computing

cuda-openmp-nbody-simulation – Sequential, OpenMP, and CUDA N-body simulations
cuda-openmp-nbody-simulation – Parallel N Body Simulation: Sequential, OpenMP, and CUDA Implementations
cuda-h2d-d2h-bandwidth-study – CUDA H2D/D2H Bandwidth Study
mergesort-parallelization-study – Merge Sort: Parallelization Study
prefixsum-openmp-benchmark – Parallel Prefix Sum With OpenMP
rapid-data-processing – Rapid transaction data processing with SQLite
blockchain-transaction-concurrency – Blockchain transaction concurrency

Algorithms & Competitive Programming

Software Development

Jaga – A 2D/3D Android game development framework
EZpark – Campus parking spot availability app
tcp-socket-messenger – TCP-based messenger
aes-encryption – AES encryption/decryption
tfidf-ngram-search-engine – Local search engine with TF-IDF and n-grams
infinity-bot – Large-scale Discord community bot with ~300 Python modules across 72 independently loadable extensions

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