DNA Half-Life Bone Deposition Age Degradation Bound Calculator
Conditional maximum age at a caller minimum surviving fraction under constant first-order DNA half-life; no calendar dating, recovery or identity inference.
Description
DNA Half-Life Bone Deposition Age Degradation Bound Calculator: return conditional maximum years.
A half-life model describes an exponentially declining surviving fraction. The minimum fraction of interest sets the age at which that modeled fraction is reached.
This tool returns conditional maximum years. Use the stated units and model convention when interpreting these fields.
When to use this tool
Use this tool when the supplied inputs match the specific operation described above and you need a repeatable result under its stated convention.
- Check the supported input and output contract against an existing calculation or observation.
- Use the complete example to confirm units, selector spelling and result interpretation.
How to use the tool and how it works
- Enter every field in the input table using the stated units and the exact supported selector spelling where applicable.
- Run the tool. Correct input errors before interpreting an output.
- Read the result fields below; use accompanying flags and the stated sign, boundary or model convention when interpreting a number.
Require a positive half-life and a minimum surviving fraction in (0,1]. Return minus half-life times log2(minimum fraction).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| halfLifeYears | Half life years. Years. | Finite number; greater than zero |
| minimumSurvivingFraction | Minimum surviving fraction. Fractional units; 0.2 means 20%. | Finite number; greater than zero; from zero to one inclusive |
| Output field | Interpretation |
|---|---|
| result | Object containing the following named result fields. |
| result.conditionalMaximumYears | Conditional maximum years; use the stated units and sign convention. |
{
"input": {
"halfLifeYears": 500,
"minimumSurvivingFraction": 0.125
},
"output": {
"result": {
"conditionalMaximumYears": 1500
}
}
}Limitations and assumptions
- This conditional model does not date a specimen or establish preservation conditions for real DNA.
- Every declared field is required and unexpected fields are rejected. Numeric inputs must be finite; input errors are distinct from a valid false result or an explicitly qualified output.
- Extremely large inputs and nonfinite or excessively large outputs are rejected. List positions reported by the tool use zero-based indices unless stated otherwise.
Alternative or Complementary methods
Check the underlying observations, units and conventions independently before using the result in a larger workflow. The tools listed below address nearby tasks; compare their inputs and scope before substituting one for this operation.
References
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