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- NEW COMPUTER PROGRAM FROM NASA -- TURBINE DESIGN
-
- A computer program from NASA Lewis Research Center was developed for the
- preliminary design analysis of axial-flow turbines. The computations are
- based on mean-diameter flow properties and do not consider any radial
- gradients. Specific heat ratio is assumed constant throughout the turbine.
- For any given turbine, all stages, except the first, are specified to have
- the same shape velocity diagram. The first stage differs only in that the
- inlet flow is axial. The velocity diagram shape depends upon the
- speed-work parameter value and the specified type of velocity diagram. Any
- of three types of velocity diagrams can be specified: symmetrical, zero
- exit swirl, or impulse. Exit turning vanes can be included in the design.
-
- This program, inventory number LEW-11815, is written in FORTRAN 77 and can
- be ported to any computer with a standard FORTRAN compiler which supports
- NAMELIST. It was originally developed in 1972 on an IBM 7000 series
- computer running VM and is now available for IBM PC computers and
- compatibles running MS-DOS under Lahey FORTRAN, and DEC VAX series
- computers running VMS. Format statements in the code may need to be
- rewritten depending on your FORTRAN compiler. The source code and sample
- data are available on a 5.25 inch 360K MS-DOS format diskette. Program
- $500, documentation $15.
- --------------------------------------------------------
- NEW COMPUTER PROGRAM FROM NASA -- METALLURGY
-
- An iron-, nickel-, or cobalt-based alloy composition can cause the alloy to
- form sigma phase when treated at high temperatures. Any sigma phase
- formation is undesirable when working with these materials, because it
- weakens the alloy. The PHACOMP algorithm was developed from the need to
- screen any hypothetical or developmental alloy for either sigma phase
- formation or the propensity for such formation. Based only on the alloy
- composition the algorithm is able to predict sigma phase formation. SUPER
- PHACOMP was developed at NASA Marshall Space Center after research into
- the many variations of the PHACOMP algorithm. The resulting program
- implements three of these versions, permitting comparison of results to
- give greater reliability to the predictions. Since certain calculations
- are common to each, the three versions were woven together for efficiency.
- While sigma phase prediction is its primary function, SUPER PHACOMP also
- performs other calculations of alloy properties. This program could
- benefit anyone working with alloy design.
-
- SUPER PHACOMP, MFS-26164, is written in BASIC for IBM PC series or
- compatible computers running MS-DOS v3.30 or later. No executables are
- included with the distribution. The source code should be compatible with
- any DOS-based BASIC language interpreter. SUPER PHACOMP requires 640K RAM
- for execution. This package is available on a 5.25 inch 360K MS-DOS format
- diskette. Program $100; documentation $11.
- --------------------------------------------------------
- NEW COMPUTER PROGRAM FROM NASA -- SOFTWARE COSTING
-
- The cost of developing computer software consumes an increasing portion of
- many organizations' budgets. As this trend continues, the capability to
- estimate the effort and schedule required to develop a candidate software
- product becomes increasingly important. COSTMODL, from NASA Johnson Space
- Center, is an automated software development estimation tool which
- fulfills this need. COSTMODL accepts a description of a software product
- to be developed and computes estimates of the effort required to produce
- it, the calendar schedule required, and the distribution of effort and
- staffing as a function of the defined set of development lifecycle phases.
- This is accomplished by the five cost estimation algorithms incorporated
- into COSTMODL: the NASA-developed KISS model; the Basic, Intermediate, and
- Ada COCOMO models; and the Incremental Development model. This choice
- affords the user the ability to handle project complexities ranging from
- small, relatively simple projects to very large projects.
-
- COSTMODL, inventory number MSC-22010, was written for IBM PC compatibles,
- and it requires Turbo Pascal 5.0 or later and Turbo Professional 5.0 for
- recompilation. An executable is provided on the distribution diskettes.
- COSTMODL requires 512K RAM. The standard distribution medium for COSTMODL
- is three 5.25 inch 360K MS-DOS format diskettes. The contents of the
- diskettes are compressed using the PKWARE archiving tools. The utility to
- unarchive the files, PKUNZIP.EXE, is included. Program $600; documentation
- $29.
- --------------------------------------------------------
- NEW COMPUTER PROGRAM FROM NASA -- NEURAL NETS
-
- The primary purpose of NNETS (Neural Network Environment on a Transputer
- System, NASA Johnson Space Center) is to provide users a high degree of
- flexibility in creating and manipulating a wide variety of neural network
- topologies at processing speeds not found in conventional computing
- environments. To accomplish this purpose, NNETS supports back propagation
- and back propagation related algorithms. The back propagation algorithm
- used is an implementation of Rumelhart's Generalized Delta Rule. NNETS was
- developed on the INMOS Transputer. NNETS predefines a Back Propagation
- Network, a Jordan Network, and a Reinforcement Network to assist users in
- learning and defining their own networks. The program also allows users to
- configure other neural network paradigms from the NNETS basic
- architecture.
-
- NNETS, inventory number MSC-21485, was written for the INMOS C compiler
- D711B version 1.3 or later (MS-DOS version). A small portion of the
- software was written in the OCCAM language to perform the communications
- routing between processors. NNETS is configured to operate on a 4 X 10
- array of Transputers in sequence with a Transputer based graphics
- processor controlled by a master IBM PC 286 (or better) Transputer. A RGB
- monitor is required which must be capable of 512 X 512 resolution. It must
- be able to receive red, green, and blue signals via BNC connectors. NNETS
- is meant for experienced Transputer users only. The program is distributed
- on 5.25 inch 1.2Mb MS-DOS format diskettes. Program $500; documentation
- $29.
- --------------------------------------------------------
- NEW COMPUTER PROGRAM FROM NASA -- ANTENNAS
-
- Accurate computer modeling of passive circular waveguide components is
- often required during the design phase for optimizing frequency response
- and/or determining the tolerance required on components in order to meet
- radio frequency specifications. Many circular waveguide devices can be
- represented either exactly or approximately as a series of circular
- waveguide sections which have a common center. In addition, smooth tapers
- and horns of arbitrary profile may be approximated by a series of small
- steps. The Scattering Matrix Program for Circular Waveguide Junctions,
- CWGSCAT, computes the scattering matrix for a series of circular waveguide
- sections. These sections must possess the same center, but the radius and
- length of each section is completely arbitrary.
-
- CWGSCAT, inventory number NPO-18708, is written in FORTRAN to run on IBM PC
- series computers and compatibles running MS-DOS. It requires 355K of RAM.
- The standard distribution medium is a 5.25 inch 360K MS-DOS format
- diskette. This program is a copyrighted work with all copyright vested in
- NASA. Program $500; documentation $16.
- --------------------------------------------------------
- NEW COMPUTER PROGRAM FROM NASA -- IMAGE PROCESSING
-
- PC-SEAPAK from NASA Goddard Space Flight Center is a user-interactive
- satellite data analysis software package specifically developed for
- oceanographic research. The program is used to process and interpret data
- obtained from the Nimbus-7/Coastal Zone Color Scanner (CZCS), and the NOAA
- Advanced Very High Resolution Radiometer (AVHRR). PC-SEAPAK is a set of
- independent microcomputer-based image analysis programs that provide the
- user with a flexible, user-friendly, standardized interface, and
- facilitates relatively low-cost analysis of oceanographic satellite data.
- Version 4.0 includes 114 programs.
-
- The CZCS scanning radiometer aboard the NIMBUS-7 satellite was designed to
- measure the concentration of photosynthetic pigments and their degradation
- products in the ocean. AVHRR data is used to compute sea surface
- temperatures and is supported for the NOAA 6, 7, 8, 9, 10, 11, and 12
- satellites. The CZCS operated from November 1978 to June 1986. CZCS data
- may be obtained free of charge from the CZCS archive at NASA/Goddard Space
- Flight Center. AVHRR data may be purchased through NOAA's Satellite Data
- Service Division. Ordering information is included in the PC-SEAPAK
- documentation.
-
- PC-SEAPAK, inventory number GSC-13320, has been under development since
- 1988. Version 4.0 was released in 1992, and is distributed without source
- code. It is available only as a set of 32 1.2Mb 5.25 inch IBM MS-DOS
- format diskettes. PC-SEAPAK is a copyrighted product with all copyright
- vested in the National Aeronautics and Space Administration. Phar Lap's
- DOS Extender run-time version is integrated into several of the programs;
- therefore, the PC-SEAPAK programs may not be duplicated. Three of the
- distribution diskettes contain DOS Extender files. One of the distribution
- diskettes contains Media Cybernetics' HALO88 font files, also licensed by
- NASA for dissemination but not duplication. Program $450; documentation
- $50.
-
- COSMIC
- The University of Georgia
- 382 East Broad St, Athens, GA 30602
- 404-542-3265
-
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