| Parameter                             | First peak | Second peak |
| Activation energy (kJ/mol)            | E 1 =340   | E 2 =498    |
| Pre-exponential factor, log q (K/min) | 18.90      | 28.20       |

Caption: Crystallization kinetic parameters for MAS-T glass determined by DTA

You are provided with a table from a material science paper. Here are JSON templates for two types of numeric cells: "Other" and "Glass_Compound_Amount":
{"value": "xx", "type": "Other"}
{"value": "xx", "type": "Glass_Compound_Amount", "constituent": "xx", "unit": "xx", "material": "xx"}

Please describe all numeric cells in the above table following the JSON templates (proceeding by row in a left-right, top-down direction). For each cell, output one JSON description per line. For any unanswerable attributes in the templates, set their value to the placeholder "xx".

Cell Description:
{"value": "18.90", "type": "Other"}
{"value": "28.20", "type": "Other"}