Progressive disclosure is a strategy for managing information. Information is withheld from the user until it is necessary. This strategy is used to prevent information overload.
The Oblique Effect: Humans are inconsistent at discerning the angle of lines.
They are better at measuring angles closer to horizontal or the vertical. The below plot shows error changing with line section angle.
Elements in a system can be protected by incorporating a weak link. The weak link protects the rest of the system by failing first. Thus, the weakest link is one of the most important elements in the system.
There are three ways to organize physical structures:
- Masses: entirely relying on solid bodies of material for support. engineered earth, masonry
- Frames: material formed into edges and nodes. tent frame
- Shells: material in a thin membrane enclosing a volume. aluminum baseball bat