Omar Ashraf Mohammed — home

Research / Technical reports

Experiments, reports, and research work

Two different things, deliberately not blurred together. Research is open-ended work with an unresolved question at the end of it. Technical reports are coursework investigations — bounded problems, taken seriously. Neither is peer reviewed, and neither is presented as though it were.

Research

Unpublished / paused2026

Exercise Form Assessment from Video

With fifteen templates a 2007 gesture recogniser beat both classical ML and a CNN-LSTM. On a public benchmark with seven thousand samples the ranking reversed entirely. The finding is about data regime, not model sophistication.

A recorded boxing corpus of 15 template videos (five actions × three execution-quality levels) with an unseen 59-second test video containing 19 actions; benchmarked against the UCI Human Activity Recognition Using Smartphones dataset (7,352 train / 2,947 test).

Read the dossier

Technical reports

Technical report2026

Comparative SMS Spam Detection

A heavier neural classifier improves spam F1 only modestly over TF-IDF logistic regression — raising the more useful question of when that cost is justified.

Approximately 5,572 SMS messages, roughly 13% spam, with a shared stratified 20% test split.

Read the dossier

A controlled dense-network study where 80.3% accuracy hides the harder result: minority-class performance remains much weaker.

The Keras Reuters newswire corpus — 46 single-label topics with pronounced class imbalance, represented as 10,000-dimensional multi-hot vectors.

Read the dossier

Technical report2026

Used-car Price Valuation

A classical regression study that improves through target transformation, feature engineering, cross-validation and regularisation — not through a product claim.

A used-car listings dataset with prices denominated in rupees.

Read the dossier

Technical report2026

When Close Isn't Close Enough

A from-scratch k-NN investigation showing that careful scaling, fold-safe transforms and honest model selection matter more than a simplistic "best distance" story.

The Wine and Digits datasets, evaluated separately.

Read the dossier

Research


Technical reports


On Medium