brad | Shared With: Everyone - Mar 09 2007 | parts, metal, prototyping, paia
The EBM machine produces components from Ti6Al4V (Ti64) and Ti6Al4V ELI, two commonly used alloys in the aerospace industry. The Ti64 parts exhibit properties (figure 3) that match those of wrought materials and exceed those of investment castings.
Quoted: Electron Beam Melting is a new alternative for both rapid manufacturing and prototyping metal components with direct benefits to the aerospace industry. The ability of Arcam and Stratasys to produce titanium parts in hours creates new opportunities for prototyping and low-volume production.
- brad | Shared With: Everyone - Feb 15 2008 | parts, science
A great, easy -to-read introduction to the epoxy process. Provides a simple explanation of "degrees of polymerization" and its effect on heat-related plasticity in diepoxy.
Quoted: Provides definition, structure, and uses of epoxy resins.
ShareViewed: 1 Time - brad | Shared With: Everyone - Nov 30 2007 | free, parts, DIY, paia, fonts
This looks like a neat way to make timing diagrams with just a word processor or drawing program!
Quoted: Timing Diagram Truetype font
ShareViewed: 9 Times - brad | Shared With: Everyone - Nov 29 2007 | patents, free, parts
Typically Nonpareil.
Quoted: (...) Now most of the time when people describe how the patent system works they are people with a vested interest in the system. And so they describe the patent system from the point of view of somebody who wants to get a patent and then point it at programmers and say, "hand me your money". This is natural, you know, when they sell lottery tickets they talk about people who win, not people who lose. Of course most of the people lose, but they don't want you to think about them and so they talk about the ones who win. It's the same with patents.
The patent system is a very expensive lottery for its participants. But of course the people who run the system want you to think about the small chance you might win. So to redress this imbalance, I am going to explain what the patent system looks like from the point of view of somebody who might be a victim of a patent. That is, somebody who wants to develop software. (...)
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