background preloader

The Museum of Unworkable Devices

The Museum of Unworkable Devices
The Reading Room. Related Galleries. Web resources. "It may be perpetual motion, but it will take forever to test it." Related:  To be sorted

Timelines of History, Today in History, World History Notes on Continuously Variable Transmissions Continuously Variable Transmissions are transmissions that provide an uninterrupted range of speed ratios, unlike a normal transmission that provides only a few discrete ratios. Frictional Type The most common type of CVT is the frictional type, in which two bodies are brought into contact at points of varying distance from their axes of rotation, and allowing friction to transfer motion from one body to the other. Sometimes there is a third intermediary body, usually a wheel or belt. The simplest CVT seems to be the "disk and wheel" design, in which a wheel rides upon the surface of a rotating disk; the wheel may be slid along it's splined axle to contact the disk at different distances from it's center. Friction plays an important part in frictional CVT designs - the maximum torque transmissible by such a design is: Tmax = Cf × FN × Ro Power is lost in two ways: deformation of the components; and differential slip. More advanced designs used three bodies instead of two. Electrical Type

Wiki Reference Wiki — a wiki containing examples of how to make the wiki do stuff. wiki wiki wiki. I like saying wiki. wiki. I have a question! Some people (a whole 2 of them!) have asked about what new things I have been working on. Is there any actual interest in me setting up some sort of notification system? It would probably be using twitter because that is quick and easy. I would rather not spam my personal twitter feed with whatever I am playing with in tiddlywiki. The list below gets updated pretty often, I add new things to the end of the list so you may need to scroll down to see them. You can skip directly to Learning TiddlyWiki if you would like. If you are looking for something new and interesting, you can also to the Random List of Awesome Things, a list of interesting TiddlyWiki things that other people have made. If you can't see the entire tiddler, or if you can't see the table of contents to the right you can click on the Width/Font Size button in the top right of the page to adjust the width so you can see everything. (click on a list item to get help with that item)

ILovePhilosophy.com • Index page Engineering ToolBox Ipe extensible drawing editor download Interesting Facts | From the most weird to inevitably true facts in a few words. Waterjet Web Reference: Info and resources for water jets. PowerPoint Templates, Backgrounds, Presentation, Plugins, Converters and more - DigitalOfficePro the best thing i learned today Asking Questions to Improve Learning | The Teaching Center | Washington University in St. Louis When you prepare for class, office hours, and help sessions, compose specific questions that you will ask your students (or that you anticipate they will ask you). Doing so will help you increase student participation and encourage active learning. The strategies below will also help you formulate questions for exams and paper assignments. Active learning extends beyond the classroom. General Strategies for Asking Questions When planning questions, keep in mind your course goals. Responding Effectively Wait for students to think and formulate responses. Why Ask “Open” Questions? 1. What is the most important idea that was generated in today’s discussion? 2. Could you elaborate on that point? 3. What are the values or beliefs that inform this argument? 4. How do you think that this issue is viewed by those with whom you disagree? 5. When does that principle apply? 6. How do you know that? 7. What do you think about the idea just presented by your classmate? 8. 9. 10. 11. 12.

The Blogs at HowStuffWorks Flipping with Kirch

Related: