Aliquotation of items

[flange-ipb]

What we already have:

• table items has a column parent_id to model inheritance

Features:

• aliquotation strategies:
  • user defines number of aliquots and amount per aliquot (use cases: fill liquids from one container to another; weigh out solids)
  • consume whole amount of original item with a certain number of aliquots, i.e. autocalulate each aliquots' amount
  • create a solution: (technically not an aliquot, but it should reflect the child-parent relationship)
    • user defines targets: a (molar/mass) concentration and a volume
    • program calculates the required mass and error margins (+/-20%, adjustable?)
      • if the material is a structure and has a molecular weight: can use molar or mass concentration
      • else: can use mass concentration only
    • user inputs the weighed mass
    • program calculates the final concentration (or the volume needed? ... difficult to measure)
    • (optional?) user defines a sample container size (volume) and type
    • (optional?) user chooses a place for the new item
    • Could be done with a PrimeFaces wizard to define the steps?
  • ...
• Upon aliquot creation, the amount of the original item should be reduced. A negative amount should result in an error. (Could be tricky, because operations on doubles may not be exact.)
• Users should be able to see a list of all aliquots for a given item.
• Users should be able to see the parent of a given item.

Thoughs and ideas

• aliquotation profiles (user-specific)
  • example: For the strategy 'create a solution' the user defines values for the target concentration and volume and the container properties. An aliquotation profile is chosen before entering the 'create a solution' view and the profile's values are applied to the bean values.