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Petros Apostolou's Projects

concurrent-programming icon concurrent-programming

POSIX thread management primitives and Linux processes synchronization for the implementation of the LINUX functions for creating and synchronize shared memory between LINUX processes and POSIX thread programs, where threads execute in different processes and communicate through shared memory (shmget, shmat, shmdt, shmctl)

conjugate-gradient-cuda icon conjugate-gradient-cuda

Process simulation from a single CPU to a single GPU implementation. A speedup is observed with the matrix-free method compared to a linear solver using a sparse matrix, both on a single GPU. In addition, several schemes devised to gain higher efficiency are discussed in details, which include exclusion of inactive elements from the memory, adaptive meshing in the build direction, preconditioner, and layer lumping.

databook_python icon databook_python

IPython notebooks with demo code intended as a companion to the book "Data-Driven Science and Engineering: Machine Learning, Dynamical Systems, and Control" by J. Nathan Kutz and Steven L. Brunton

fdrnet icon fdrnet

Feedback Recovery Network (FDRNet). FDRNet is a novel autoencoder architecture for quantitative gait feedback discovery and generation from multivariate long sequence time-series data.

human-behavior-recognition icon human-behavior-recognition

Real-time video streaming for automated human subtle behavior recognition. The framework uses an open source library to track the facial feature points and the rigid body face transformations on each frame. Unlike activity recognition tasks, where the algorithm can only globally recognize a certain activity (i.e soccer, basketball, running, etc), the proposed behavioral recognition framework buffers local spatio-temporal vectors to detect and track subtle movements to perceive human behavior.

legofy icon legofy

Make images look as if they are made out of 1x1 LEGO blocks

linux-device icon linux-device

This repository is an example of the development of a Linux character device using concurrent programming to thread stream buffers on kernel memory

motorticdetector icon motorticdetector

Pytorh GPU implementation of CNN for Motor-Tic Detection in Movement Disorders

mpitutorial icon mpitutorial

MPI programming lessons in C and executable code examples

onion icon onion

C library to create simple HTTP servers and Web Applications.

pcg-matfree icon pcg-matfree

Modern matrix-free method for preconditioned conjugate gradient (PCG) iterative solver

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