FORTRAN software

J. Adams, MUDPACK Multigrid FORTRAN Software for the Efficient Solution of Linear Elliptic Partial Differential Equations, Appl. Math. Comput, 34 (1989). 

While it is very desirable to write software in a more flexible and structured language than FORTRAN, it is unrealistic to lose contact with the vast quantity of FORTRAN software which has been honed for efficiency over the years. 

Access to existing FORTRAN software (for molecular integrals and other utilities) is also guaranteed this software, in general, does not run on the FORTRAN virtual machine but on particular FORTRANs all of which are accessible. 

In order to balance public domain science with a high quality commercial software product it has been necessary for us to reimplement almost every aspect of computational chemistry embodied in HyperChem. All HyperChem source code is written in C or C-t-t, specified, designed, and implemented by Hyper-Chem s developers. We have stood on the scientific shoulders of giants, but we have not used their FORTRAN code Thus, although we have had access to MOPAC and other public domain codes for testing and other purposes, HyperChem computes MINDO, MNDO, and AMI wave functions, for example, with HyperChem code, not MOPAC code. We have made the effort to implement modern chemical science in a modern software-engineered product. 

Software programs are usually written in a more user-friendly high-level language such as Fortran, Pascal, or C, which facilitates the tedious and labor-intensive task of writing a computer program. 

Seeing the success of the UNAMAP BBS, EPA s Office of Air Quality Planning and Standards started a BBS for information on regulatory models in June 1989. This has expanded to a BBS called TTN, Technology Transfer Network. This BBS, in Durham, NC, is reached on (919) 541-5742 and the system operator on (919) 541-5384. A part of this BBS called SCRAM, Support Center for Regulatory Air Models, contains model FORTRAN codes, model executable codes for use on personal computers, meteorological data, and in some cases model user s guides. Much of the information is downloaded in "packed" form, and software to unpack the files must also be downloaded from the bulletin board. 

OD -T alpha-lies, control, fault-tree description, failure data AND OR NOT K-of- N Bottom-up modularization and decompo-dtion of fault tree into t>est modular nepresentation Top event probability, time dependence, c s, r rCLs, and Linceitainty Option of not generating minimal cut >ets forquali ing fault ree IBM 360/370 Fortran IV, Available j from Software < enter... 

The Internet has become a wonderful source of (sometimes free) software for numerical analysis. Browse through it, and you will soon see that Fortran remains the programming language for serious numerical computation. One excellent book that is currently available without charge is... 

Dongarra, J. Performance of Various Computers Using Standard Linear Equations Software in a Fortran Environment. Technical Memorandum No. 23, Argonne National Laboratory, Mathematics and Computer Science Division, July 29, 1986. 

RS/1 represents a distinct contrast to earlier scientific software. In general, early software used by scientists took three primary forms. (1) Languages such as FORTRAN, BASIC, and PASCAL were helpful in supporting highly computational applications, but were not designed to support research data management. 

We have adapted a commercially available x-ray diffractometer normally used for structure determinations on single crystals to operate as a very flexible device for performing x-ray pole figure determinations and related studies on polymeric materials. Descriptions of crystallite orientations, as provided by pole figures, are useful in studying many aspects of the behavior of products made from semicrystalline polymers. This paper describes the software that we have written for our pole figure facility. Except for some vendor-provided routines to drive the hardware Interface all of our software is written in FORTRAN. Menu driven operation is provided to maximize user convenience. 

If/(x) has a simple closed-form expression, analytical methods yield an exact solution, a closed form expression for the optimal x, x. Iff(x) is more complex, for example, if it requires several steps to compute, then a numerical approach must be used. Software for nonlinear optimization is now so widely available that the numerical approach is almost always used. For example, the Solver in the Microsoft Excel spreadsheet solves linear and nonlinear optimization problems, and many FORTRAN and C optimizers are available as well. General optimization software is discussed in Section 8.9. 

The SIMCA software is available in two forms, both developed by Wold (2 5, 31) 1) an interactive, Fortran version which runs on Control Data Corporation (CDC) machines, and 2) an interactive version, SIMCA-3B. Additional information on these programs is contained in Appendix I. Only the SIMCA-3B version contains the CPLS-2 program used for PLS analysis. 

External Processes. The Radial language supports interfacing to software written in the various computer languages available under UNIX Fortran, C, Pascal, Lisp, etc. The Radial language takes care of the details of passing arguments to and from external routines. This capability allows Radial to be used Just for the... 

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