Archive // Engineering Deep Dives

Selected Engineering Projects

A collection of systems software, security research, hardware utilities, and spatial applications. Each project includes technical specifications, live interactive components, and open-source GitHub repositories.

Systems & Security•2025 – 2026

REF: video-stego

Video Steganography Engine

Data payload embedding in video streams via spatial LSB & DCT perturbation

Engineered a low-latency video steganography pipeline in C++ and OpenCV that embeds encrypted payload data across video frames without visible perceptual distortion. Features dynamic bit-plane slicing, spatial residual minimization, and SHA-256 HMAC payload authentication.

Video Steganography Bit-Plane & Payload Inspector

Real-time LSB substitution analysis, spatial residual diffs, and SHA-256 HMAC integrity

Frame:

I-Frame (Keyframe)

Payload Injection Density:1 bit/channel

AES-256 / SHA-256: ARMED

Payload encrypted via ChaCha20-Poly1305 with frame sequence nonce.

Fidelity & Capacity Metrics:

Frame Payload Capacity:759.4 KB / frame

PSNR (Fidelity):52.40 dB (>48dB = pristine)

SSIM (Structure):0.9999

Insertion Latency:1.84 ms (Zero frame drop)

Technical Architecture Specifications:

•Sub-2ms per-frame embedding latency optimized for 1080p60 uncompressed video streams
•Dynamic LSB bit-plane selection (1 to 3 bits/channel) preserving high PSNR (> 51 dB)
•ChaCha20-Poly1305 payload encryption with frame sequence nonce verification
•Robust against statistical chi-square steganalysis via pseudorandom pixel dispersal

Performance Benchmark:PSNR > 51.4 dB · 1.84 ms Latency · Zero Parity Loss

C++

OpenCV

Cryptography

Bit-Plane Slicing

DCT

FFmpeg

Data & GIS•2024 – 2025

REF: dark-sky-gis

Lebanon Dark-Sky GIS Observatory

Light pollution mapping & astronomical data visualization across Lebanese summits

A geospatial analysis suite that processes satellite radiance datasets (NOAA VIIRS Day/Night Band) and calibrated ground-truth Sky Quality Meter (SQM) readings. Maps light pollution corridors and astronomical seeing quality across high-altitude summits in Mount Lebanon and North Lebanon.

Lebanon Dark-Sky GIS Observatory & Radiance Dataset

Spatial photometric analysis based on VIIRS DNB night radiance and SQM field sensors

Filter Bortle:

Qurnat as Sawda' Peak

North Lebanon (Mount Makmel) · 34°18'05"N 36°06'54"E

Astro Quality Score

98/100

Highest point in the Levant. Exceptional atmospheric transparency, negligible aerosol scattering.

Zenith Radiance

0.04 nW/cm²/sr

Sky Brightness (SQM)

21.85 mag/arcsec²

Atmospheric Seeing

0.72" (FWHM)

Milky Way Core: High Detail

Zodiacal Light: Observable

Light Pollution Contrast vs Beirut Coastline:99.9% Darker

Technical Architecture Specifications:

•Calculates zenith radiance (nW/cm²/sr) and Bortle darkness classes across 8 key Lebanese observatories
•Analyzes cloud inversion thresholds at high elevations (Qurnat as Sawda 3,088m, Sannine 2,200m)
•Geospatial vector processing pipelines built with Python, QGIS, PostGIS, and MapLibre GL
•Identifies dark-sky preservation corridors with up to 98% contrast vs. coastal light domes

Performance Benchmark:21.85 mag/arcsec² peak SQM · 8 Mountain Summits · VIIRS Calibrated

Python

GIS / QGIS

MapLibre

PostGIS

VIIRS DNB

Photometry

Hardware & Physics•2025

REF: hardware-physics

Hardware & Resistor Color-Code Calculator

Real-time IEC 60062 resistance decoder, tolerance bounds & circuit presets

An interactive engineering calculator designed for electronics prototyping and laboratory bench work. Accurately decodes 4-band and 5-band resistor standard color codes, computes precision tolerance bounds, and maps values to standard E24/E96 component series.

Resistor Color-Code Decoder & Physics Utility

Real-time IEC 60062 standard resistance & tolerance calculation

Nominal Resistance:

4.70 kΩ ±5%

Range: 4.46 kΩ – 4.93 kΩ

Standard: E24 / E96 Series

Band 1 (1st)4

Band 2 (2nd)7

Multiplier10^2

Tolerance±5%

Common Laboratory Circuit Presets:

Technical Architecture Specifications:

•Full IEC 60062 compliance for 4-band standard and 5-band high-precision resistor packages
•Dynamic SVG graphic updates in real-time with authentic component geometry and color rendering
•Immediate tolerance margin envelope calculation (Min Ω to Max Ω)
•Preloaded with laboratory circuit presets (I2C pull-ups, LED current limits, op-amp feedback)

Performance Benchmark:0.05% Precision · E24/E96 Series · Instant Feedback

React

TypeScript

SVG Synthesis

Digital Electronics

IEC 60062

Hardware & Physics•2024 – 2025

REF: signal-notation

Audio Signal Processing & Harmonic Synthesizer

Continuous-time Fourier transform (CTFT), oscilloscope waveforms & pitch mapping

Interactive signal synthesis and harmonic analysis utility that models audio oscillators (Sine, Square, Triangle, Sawtooth). Visualizes live waveforms on an animated canvas oscilloscope and computes real-time FFT spectral distribution, harmonic distortion, and musical pitch notation.

Signal Frequency Synthesizer & Harmonic Analyzer

Real-time continuous time Fourier transform (CTFT) & musical pitch mapping

CH1: 1.0 V/divTB: 2.27 ms/div

Frequency:440 Hz (A4)

Peak Amplitude (Vp):4.0 V

Harmonic Properties:

Wave Period (T):2.27 ms

Angular Speed (ω):2765 rad/s

Musical Notation:A4 (Equal Temp.)

Nyquist Sampling:≥ 880 Hz

Laboratory Frequencies:

Technical Architecture Specifications:

•Real-time continuous audio synthesis algorithm with 60 FPS HTML5 canvas oscilloscope
•Fast Fourier Transform (FFT) harmonic spectral density decomposition
•Musical equal-temperament pitch mapping (A4 = 440 Hz standard)
•Period (T), angular velocity (ω), and Nyquist-Shannon sampling frequency verification

Performance Benchmark:60 FPS Oscilloscope · FFT Decomposition · Equal Temp. Pitch

TypeScript

HTML5 Canvas

Audio DSP

Fourier Transforms

Harmonic Physics

Hardware & Physics•2024

REF: riscv-core

5-Stage Pipelined RV32I Processor Core

Synthesizable 32-bit RISC-V microprocessor with hazard resolution and forwarding

Constructed a complete 32-bit RISC-V (RV32I) microprocessor architecture from gate-level primitives in SystemVerilog. Features a classic 5-stage pipeline (IF, ID, EX, MEM, WB), full data forwarding units, branch hazard stalls, and memory-mapped I/O interfaces.

Technical Architecture Specifications:

•Implements base RV32I integer instruction set with custom ALU and branch comparator
•Hazard detection unit resolving Read-After-Write (RAW) data dependencies with zero penalty when forwardable
•Synthesized and verified on Xilinx Artix-7 FPGA board with ModelSim testbenches
•Benchmarked with bare-metal C applications compiled via riscv32-unknown-elf-gcc

Performance Benchmark:1.14 IPC · 100 MHz Synthesized · Full RV32I Spec

SystemVerilog

RISC-V

Xilinx Vivado

ModelSim

FPGA

C / Assembly

Hardware & Physics•2023 – 2024

REF: lora-telemetry

Resilient LoRa IoT Telemetry Mesh

Ultra-low-power environmental sensor nodes with AES-128 payload security

Developed firmware for STM32 and ESP32 microcontroller nodes communicating over 868MHz sub-GHz LoRa radio. Designed packet routing algorithms with adaptive transmission power, deep sleep power gating, and link-layer AES encryption for long-range environmental telemetry.

Technical Architecture Specifications:

•Dynamic sleep duty cycle achieving < 15 µA quiescent current for 12+ month battery longevity
•Multi-hop packet forwarding protocol operating reliably over a 12 km rural radius
•Link-layer payload encryption using AES-128 in Galois/Counter Mode (GCM)
•Sensor interfaces for atmospheric pressure, ambient lux, temperature, and battery telemetry

Performance Benchmark:12 km Range · 15 µA Sleep · AES-GCM Encrypted

Embedded C

STM32

ESP32

FreeRTOS

LoRaWAN

AES-128

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Explore Complete Source Code & Commit History

All engineering repositories, benchmark suites, HDL testbenches, and GIS datasets are publicly available on GitHub under permissive licenses.