DBase III

Atom types are defined in the file chem.rul. The atom types for each of the force fields are listed in the files pointed to by the AtomTypeMass entries associated with the specific force fields in the Registry or the chem.ini file. They are usually named typ.txt or typ.dbf, depending on whether text or dBASE format is used. For the AMBER force field, all variations use the same type file, defined in the [Amber] section of the Registry or the chem.ini file. It is usually called ambertyp.txt, if a text format file is used, indicated by FileFormat=Text or ambertyp.dbf, if a dBASE III format file is used, indicated by FileFormat=dbf. 

NPRDS data can be obtained in the form of magnetic tapes or floppy disks that are dBASE III or LOTUS 1-2-3 compatible. 

Failure rate data selected for the CCPS Generic Failure Rate Data Base were handled using dBase III Data Management in conjunction with the Computerized Aggregation of Reliability Parameters (CARP) developed by SAIC. CARP, designed to be used by... 

As an illustration, we will construct a database about atomic absorption using dBASE III PLUS. There are many database programs available for microcomputers, but the most popular are certainly dBASE II and the more recent dBASE III PLUS and dBASE IV versions. All are products from Ashton Tate (ref. 1). The data we want to bring into a table are the recommended data for graphite furnace analysis from the Perkin-Elmer manual (ref. 2). Table 2.1 shows the data for one element as they are present in the manual. 

It is the purpose to put the data for all the elements in the manual in a computerized database so that one can retrieve information from them in a simple manner. In what follows we will try to give an idea of how one constructs such a database, without giving complete instructions on how exactly to proceed, nor will we discuss all the possibilities of dBASE III PLUS. For such details we refer to the manual. 

Computerized System for Community Planning Uses inputs on local industries and the materials present to rank potential community hazards for CEPP (prototype) dBase III Micro J. Bare/EPA/ESRL... 

Overview. The CORA expert system has gone through two major phases in its development. The first-phase deliverable was a prototype system. The knowledge bases and explanation facility were written using the Production Rule Language (PRL) of Insight 2+. Additional user interface and reporting capabilities were developed in dBASE III+ and Nantucket Clipper. 

In the second phase of the project, EPA wanted to distribute the model to the EPA regions for independent use, and CORA was refined and upgraded to facilitate that use. The expert system was revised to include four knowledge bases containing 671 rules and up to 40 technologies for recommendation. Insight 2+, whose name was changed to Level 5 dBASE III+ and the Nantucket Clipper compiler were used. 

Four or five software systems now offer structure searching on PC s and databases are available for use with them. Some of these systems have faciUties for data handling or interfaces to database management packages (for example, PSIDOM can be used in conjunction with dBASE III). 

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