Re: Units

*To*: mathgroup at smc.vnet.net*Subject*: [mg32461] Re: Units*From*: "John Jowett" <John.Jowett at cern.ch>*Date*: Tue, 22 Jan 2002 03:19:27 -0500 (EST)*Organization*: CERN*References*: <a2b4ch$lim$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hello, You might like to look at our package http://jowett.home.cern.ch/jowett/Accelerator/ConstantsUnits.html which is an extension of the standard packages Utilities`Notation`and Miscellaneous`PhysicalConstants`. It was originally intended for use in particle accelerator physics but can be used elsewhere too. The original motivation was to be able to preserve symbolic physical constants in expressions (symbols such as SpeedOfLight in the Units package always evaluate). The latest version maintains a database of symbols and their physical units so that you can check dimensional consistency of expressions as well as converting between systems of units. You define the symbols using a palette as they are introduced. John Jowett http://cern.ch/jowett "Juan Fuentes" <jfuentes at ff.oc.uh.cu> wrote in message news:a2b4ch$lim$1 at smc.vnet.net... > Dear colleagues: > Could any one say me about a package to work in solving > physics problems in the area of semiconductor physics where the units are > authomatically converted? Thanking in adavance, Juan > >