RAGBEEF: a FORTRAN IV implementation of a time-dependent model for radionuclide contamination of beef
| Autor: | L.M. McDowell-Boyer, G.G. Killough, J.C. Pleasant |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
Engineering
Radionuclide Source code business.industry Fortran media_common.quotation_subject Environmental engineering food and beverages Beef cattle Biological materials Dependent model Statistics Radionuclide contamination business computer Agricultural crops media_common computer.programming_language |
| DOI: | 10.2172/5179753 |
| Popis: | RAGBEEF is a FORTRAN IV program that calculates radionuclide concentrations in beef as a result of ingestion of contaminated feeds, pasture, and pasture soil by beef cattle. The model implemented by RAGBEEF is dynamic in nature, allowing the user to consider age- and season-dependent aspects of beef cattle management in estimating concentrations in beef. It serves as an auxiliary code to RAGTIME, previously documented by the authors, which calculates radionuclide concentrations in agricultural crops in a dynamic manner, but evaluates concentrations in beef for steady-state conditions only. The time-dependent concentrations in feeds, pasture, and pasture soil generated by RAGTIME are used as input to the RAGBEEF code. RAGBEEF, as presently implemented, calculates radionuclide concentrations in the muscle of age-based cohorts in a beef cattle herd. Concentrations in the milk of lactating cows are also calculated, but are assumed age-dependent as in RAGTIME. Radionuclide concentrations in beef and milk are described in RAGBEEF by a system of ordinary linear differential equations in which the transfer rate of radioactivity between compartments is proportional to the inventory of radioactivity in the source compartment. This system is solved by use of the GEAR package for solution of systems of ordinary differential equations. The accuracymore » of this solution is monitored at various check points by comparison with explicit solutions of Bateman-type equations. This report describes the age- and season-dependent considerations making up the RAGBEEF model, as well as presenting the equations which describe the model and a documentation of the associated computer code. Listings of the RAGBEEF and updated RAGTIME codes are provided in appendices, as are the results of a sample run of RAGBEEF and a description of recent modifications to RAGTIME.« less |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|