Call for ArrayFire User Stories

John Melonakos Announcements, Case Studies Leave a Comment

There’s a sweet ArrayFire T-Shirt for anyone that submits a write-up of your success with the ArrayFire library. We’ve been working on a new website for our community, and we’d love to hear what you’re doing with the library. Also, your stories are important to the ArrayFire open source project in that we share them with project funders to motivate their continued investment in our community and library development. Please take some time to help us by sharing your success. We recognize that most people are not constantly focused on performance improvement. Most of you have ArrayFire in your toolbelt to accelerate code when your application demands excellent performance. If you have found it helpful in a project, please consider …

Checkpoint and Restore Emacs into Immortality

Gallagher Pryor Computing Topics, Education, Open Source 1 Comment

TL;DR. An Emacs death is horrible to endure. Checkpoint Emacs’ state at regular intervals to bring it back to life with CRIU. Yup, CRIU can handle Emacs, now! The steps, nowadays, are simple and this post quickly outlines the constraints and the commands to make it work. This post is short and to the point. The build choices, configurations, etc. have been stripped again and again to make things as simple as possible. Also, these instructions are given for a recent Ubuntu in order to be more canonical 😄 Make a Place for bins at ~/.bin Grab an Emacs without DBUS Grab CRIU Configure Emacs Your immortal Emacs will be in daemon mode and will talk with emacsclients over a …

Improved Interpretation of Pneumonia Malformation in Chest X-Rays with ArrayFire

John Melonakos Case Studies Leave a Comment

Researchers from the University of Calcutta in India credit ArrayFire in a paper published in the Applied Soft Computing Journal. The paper is titled “Chest X-ray enhancement to interpret pneumonia malformation based on fuzzy soft set and Dempster–Shafer theory of evidence” and showcases an algorithm that is qualitatively and quantitatively improved in both accuracy and execution time over other common methods used in X-ray enhancement. Research Summary The details of the algorithm development are described in the paper. Figure 1 below shows the basic structure of the algorithm: the separate processing of the original image and its complement, the use of fussy soft sets, the use of Dempster-Shafer theory, and the ultimate creation of the enhanced image. The results of …

Learn Pipes via Old Serial Terminals with Your Kid

Gallagher Pryor Education Leave a Comment

TL;DR. A lab for STEM middle school students using vintage serial terminals to illustrate that: computers communicate by sending numbers, numbers arrive one by one in order (serial), numbers travel over wires (pipes). These notes include links to materials and instructions that take you and a student through (1) connecting a serial terminal to a computer, (2) configuration, (3) playing with pipes by sending messages, and (4) logging into a serial Linux console to see how pipes scale! This is the latest in our series of education-with-old-hardware posts beginning with “Build a 486 Bootloader with Your Kid“. Required Materials A serial terminal like one of: A Wyse terminal (link to eBay). This is the best because it uses standard serial. …

Fast Atom Rearrangement in Optical Tweezer Traps

Woojun Lee ArrayFire, Case Studies Leave a Comment

“With ArrayFire, we got the best performance of the software for our needs, breaking the limit of a challenging experiment in atomic physics. We also simply saved a lot of time so that we can further develop our research.” -Woojun Lee, Korea Advanced Institute of Science and Technology (KAIST) A quantum computer is very different than a conventional computer. It utilizes the quantum mechanical properties of matter. It is thought to have the potential to far outperform conventional computers in certain types of computations. One way to realize a quantum computer is to trap many single atoms in a vacuum chamber and control them with modulated lights. As the number of atoms gets larger, controlling them also requires more and more computational …

Build a 486 Bootloader with Your Kid

Gallagher Pryor Education 1 Comment

TL;DR. A lab at an elementary school level to illustrate to children that: computers must be instructed, instruction is stored on media, the most basic instruction is a series of numbers. These notes include links to materials and instructions that take you and a student through (1) starting linux on a vintage 486 computer, (2) assembling a boot-loader, (3) writing it to a floppy, and (4) starting a computer to show a message. Intro I built a bootloader with my children and share our work in this post. It is a lab, at an elementary school level, that you can repeat for yourself and share with the rising generation. The intent of this activity is to drive home the idea …

High-energy Laser-pulse Self-compression in Short Gas-filled Fibers

Tucker Yazdani ArrayFire, Case Studies Leave a Comment

Researchers in physics and physical chemistry from the University of Southampton credit ArrayFire in a scientific report for its help in drastically reducing computation time of linear algebra, vectored mathematical operations, and fast Fourier transforms (FFT). The report examines high-energy laser pulse self-compression in short gas-filled fibers. Research Abstract From the article in Physical Review, the following abstract summarizes the research: We examine the spatio-temporal compression of energetic femtosecond laser pules within short gas-filled fibers. The study is undertaken using an advanced nonlinear pulse propagation model based on a multimode generalized nonlinear Schr ̈odinger equation that has been modified to include plasma effects. Plasma defocusing and linear propagation effects are shown to be the dominant processes within a highly dynamical …

Real-time Quantitative Phase Imaging of Red Blood Cells with ArrayFire

John Melonakos ArrayFire, Case Studies Leave a Comment

Researchers from the College of Optical Science and Engineering of Zhejiang University and the Department of Ophthalmology of Stanford University published a scientific report using ArrayFire to perform quantitative phase imaging in real-time with example results tracking red blood cell dynamics. Research Abstract From the article in Nature, the following abstract summarizes the research: Real-time quantitative phase imaging has tremendous potential in investigating live biological specimens in vitro. Here we report on a wideband sensitivity-enhanced interferometric microscopy for quantitative phase imaging in real-time by employing two quadriwave lateral shearing interferometers based on randomly encoded hybrid gratings with different lateral shears. A theoretical framework to analyze the measurement sensitivity is firstly proposed, from which the optimal lateral shear pair for sensitivity …

Identifying Defects in Bragg Coherent Diffractive Imaging with ArrayFire

John Melonakos ArrayFire, Case Studies Leave a Comment

Researchers from the Materials Science Division of Argonne National Laboratory published a scientific report using ArrayFire to identify defects in Bragg coherent diffractive imaging (BCDI). From the article in Nature, the following abstract summarizes the research: Crystallographic defects such as dislocations can significantly alter material properties and functionality. However, imaging these imperfections during operation remains challenging due to the short length scales involved and the reactive environments of interest. BCDI has emerged as a powerful tool capable of identifying dislocations, twin domains, and other defects in 3D detail with nanometer spatial resolution within nanocrystals and grains in reactive environments. However, BCDI relies on phase retrieval algorithms that can fail to accurately reconstruct the defect network. Here, numerical simulations are used …

Transcranial High-Intensity Focused Ultrasound Therapies with ArrayFire

John Melonakos ArrayFire, Case Studies Leave a Comment

Researchers from the University of Utah recently used ArrayFire to publish results on a full-wave phase aberration correction method for transcranial high-intensity ultrasound therapies. From the Journal of Therapeutic Ultrasound, the following abstract summarizes the research: Background Non-invasive high-intensity focused ultrasound (HIFU) can be used to treat a variety of disorders, including those in the brain. However, the differences in acoustic properties between the skull and the surrounding soft tissue cause aberrations in the path of the ultrasonic beam, hindering or preventing treatment. Methods The paper presents a method for correcting these aberrations that is fast, full-wave, and allows for corrections at multiple treatment locations. The method is simulation-based: an acoustic model is built based on high-resolution CT scans, and …