Research Article
PaperCAD: A System for Interrogating CAD Drawings Using Small Mobile Computing Devices Combined with Interactive Paper
Table 8
Interpretation of equations.
| Event | Correct | Incorrect |
| Correctly interpreted | 93 | | Ink capture failure (H) | | 3 | Not written in the equation area (U) | | 1 | Forgot to tap abort before writing new equation (U) | | 4 | Incorrect division operator (U) | | 1 | Incorrect multiplication operator (U) | | 4 | Misinterpreted because of timeout (U) | | 9 | Written correctly but at least one character misrecognized (S) | | 52 | Total | 93 | 74 |
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H: hardware error; U: user error; S: system error.
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