Courses from 1000+ universities
AI got cheap enough that Duolingo’s most expensive plan may not survive it. I read the earnings call transcript and opened the app to see what is actually changing for learners.
600 Free Google Certifications
Artificial Intelligence
Data Science
Cybersecurity
L'Italiano nel mondo
Introduction to HTML5
Umano Digitale
Organize and share your learning with Class Central Lists.
View our Lists Showcase
Explore the evolution of spacecraft thermal protection, comparing NASA's pioneering designs with SpaceX's innovative approach. Uncover the similarities, differences, and advancements in heat shield technology for space exploration.
Explore the creation of photosensitive pixels using copper oxide in this fascinating experiment, delving into semiconductor physics and advanced microscopy techniques.
Explore the journey of replicating 30 years of lithography technology advancements, from assembly challenges to breakthroughs, in this engaging and informative video on semiconductor manufacturing.
Explore diamond-based optical mirror creation techniques, focusing on precision cutting methods and applications in quantum optics and advanced scientific instruments.
Discover the fascinating process of laser metal deposition on glass, exploring techniques for silver, aluminum, copper, invar, titanium, and niobium in this engaging experimental demonstration.
Explore the intricate process of designing and manufacturing space-grade hinges through multiple iterations, from basic press-fits to advanced PEEK bushings and precision machining techniques.
Explore the fascinating concept of liquid metal-based reaction wheels for satellites using magnetohydrodynamic effects, including design principles and practical applications.
Discover the challenges of creating custom electromagnetic actuators for robotic applications through hands-on engineering problem-solving and troubleshooting techniques.
Electron beam lithography with a scanning electron microscope, from PMMA resist selection and development through dose dependence, proximity effects, and pattern results.
Make epoxy lenses through replication molding, examining mold materials, shrinkage, temperature, residual stress, and optical finish.
An experimental investigation into whether silicon carbide can be sintered at low temperature, examining processing, microstructure, mechanical performance, and alternative explanations.
Demonstrates atomic force microscopy through a DIY macro-AFM and real scans of precision-finished materials.
Build a DIY direct-write laser lithography system for creating micron-scale patterns in photoresist.
Build a 3D-printed scanning laser confocal microscope with an OpenFlexure stage, photodiode detector, Raspberry Pi control, and surface-profilometry imaging.
Get personalized course recommendations, track subjects and courses with reminders, and more.