Overlay Structure Research Articles

Designing overlay structures

AbstractAlthough overlaying code segments is a very old technique, there is very little literature 68 on what the ground rules are, what the options are and how to select an overlay structure. As a result, the facilities provided by most linkage editors are much poorer than they need be. In this paper we define the problem, give an algorithm for obtaining ‘minimal’ overlay structures and describe the surrounding commands and environment that are necessary to turn this algorithm into a practical tool.

Mathematical model for underwater electroacoustic transducer elements

A dynamic finite element model was developed to analyze the vibrations and acoustic radiation of a single axisymmetric electroacoustic transducer and its attached mechanical amplifying structure and waterproofing material. Element types are 2-D isotropic solid, axially radially poled and tangentially poled piezoelectric solids, acoustic fluid, membrane, fluid-solid link, spherical Helmholtz radiating boundary and silvered surface. Undamped resonances and antiresonances in air are extracted by the inverse iteration method with eigenvalue shifting. Undamped low-frequency capacitance is found by harmonic voltage driving of the transducer with subsequent calculation of the charge on a silvered surface. In water, the damped (material damping and acoustic radiation) complex response is determined for similar voltage driving and the complex impedance and far-field directional response are calculated. The model is programmed with an overlay structure and makes extensive use of mass disc storage enabling the solution of large problems using a small core allotment. Extensive testing has been successfully carried out against experimental data. [Model developed under contract to the Department of National Defence, Canada.]

Microwave Network Analyses of Surface Acoustic Waveguides - II. Rectangular Ridge Guides

Ahfruct-The microwave network approach to the solution of guided acoustic wave problems was applied in Paper I to two examples of the class of flat overlay guides: the strip and the slot guides. In this paper, the methods are applied to two different rectangular ridge StNChIeS, the well-known topographic ridge guide and the newer overlay ridge guide. In contrast to the flat overlay guides, for which good analytical results were previously available, no other analytical results have been published for the ridge guides which furnish good accuracy (although excellent numerical methods have been described). In addition, little information is available elsewhere on the pseudo-Rayleigh mode of the ridge guides, which is treated here in detail, and the overlay ridge structure itself is a new one whose properties are not yet appreciated. N THE COMPANION paper [l81 , a microwave network approach was presented for the analysis of waveguides for acoustic surface waves. The philosophy underlying this new approach was discussed, the basic features of the method were presented, and the method was applied to two examples of flat overlay waveguides, the strip and the slot guides. In the present paper, this method is applied to a different class of waveguides: rectangular ridge guides. The rectangular ridge waveguides themselves are of two types: the topographic ridge guide, for which the ridge and the substrate are composed of the same material, and the overlay ridge guide, in which the ridge is comprised of a material different from that of the substrate. The two structures are shown in Figs. l(a) and l(b). Both of these ridge guides are fundamentally different from the strip and slot guides, which appear respectively in Figs. l(a) and l(b) of Paper I. In the latter two guides, thin platings are employed to perturb the Rayleigh mode of the substrate, with the result that almost all of the energy in the waveguide mode resides in the sub

SCANCANS — An interactive scanning cell analysis system

This paper describes a computerized, general-purpose, interactive, scanning cell-analysis system developed at the Department of Clinical Cytology of the University Hospital in Uppsala. The system uses a Leitz MPV II scanning photometer, a PDP-8 computer with 24 k of core memory and a Tektronix 4010 graphic display terminal. A command interpreter and overlay structure which makes it simple to add new capabilities to the system is described. Some examples of command strings and the kind of operations the system can perform are included. Finally, the experience gained from using the system and some plans for future extensions are discussed.

PATIWEN— a code for coulomb-nuclear interference calculations

Title of program: COULFG: Coulomb, Bessel Functions Catalogue number: ABNK Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: IBM 370/165 and AS/7000; Installation: Daresbury Laboratory, Warrington, Lancs. Operating system: OS/360 GI compiler and HX compiler (level 2.2.1) Programming language used: ASA FORTRAN High speed storage required: 180 Kbytes No. of bits in a word: 32 Overlay structure: none Peripherals used: card reader, printer No. of cards in combined program and test deck: 432 Card punching code: EBCDIC

Reduced matrix elements of summations of one-particle tensor products

Title of the program: SPINORBIT WEIGHTS 2 Catalogue number: ACXL Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: Amdahl 470 V/6; Installation: University of Alberta, Edmonton, Alberta, Canada Operating system: MTS Programming language used: FORTRAN IV High speed core required: 25590 bytes No. of bits per byte: 8 Overlay structure: none Other peripherals used: card reader, line printer, card punch No. of magnetic tapes required: none No. of cards in combined program and test deck: 1952 Card punching code: EBCDIC 029 CPC library subprograms used

A new version of AAKF (Reduced Tensor Matrix Elements) adapted to spectroscopic notation

Title of program: REDUCED TENSOR MATRIX ELEMENTS 2 Catalogue number: AAKP Program obtainable from: CPC Program Library, Queen's University of Belfast N. Ireland (see application form in this issue) Computer: Installation: IBM 360/75 University of Waterloo, Waterloo, Ont. Canada Operating system: OS/360 HASP II Programming languages used: FORTRAN IV High speed store required: 102 K bytes No. of bits per byte: 8 Overlay structure: None Other peripherals used: Card reader, line printer No. of cards in combined program and test deck: 1524 Card punching code: EBCDIC 029 CPC Library subprograms used: Cat. numbers Titles Refs. in C.P.C. ACQB P SHELL CFP 1 (1969) 15 ACRN A NEW D SHELL CFP 6 (1973) 88 AAGD NJSYM 1 (1970) 241, 2 (1971) 173 AAGD0001 ADAPT NJSYM FOR WEIGHTS 2 (1971) 180 AAGD0002 ADAPT TO INTEGER ARITHMETIC 5 (1973) 161 Reference to other published version of this program: Catalogue number: AAKF; Title: REDUCED TENSOR MATRIX ELEMENTS; Ref. in C.P.C.: 6 (1973) 132.

A general purpose Monte-Carlo program

Title of program: ERRCAL Catalogue number: AAUP Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: Installation: CDC 6600 Data Center CDC, Rijswijk, The Netherlands Burroughs B 6700 Mons University Computing Center Operating system: SCOPE for CDC. MCP for Burroughs Programming language: FORTRAN IV High speed store required: 15000 words (CDC 6600) No. of bits in a word: 60 (CDC 6600) Overlay structure: None No. of magnetic tapes required: None Other peripherals used: Card reader, line printer No. of cards in combined program and test deck: 699 Card punching code: BCD

A computer program for internal conversion coefficients and particle parameters

Title of program: CATAR Catalogue number: ABGP Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: UNIVAC 1108; Installation: Sandoz A.G., Basel, Switzerland Operating system: EXEC 8 Programming language used: FORTRAN IV High speed store required: 26K words No. of bits in a word: 36 Overlay structure: None Number of magnetic tapes required: None Other peripherals used: Card reader, line printer Number of cards in combined program and test deck: 3136 Card punching code: BCD

A fortran code for automatic spectrum analysis on medium-scale computers

Title of program: PEAK2 Catalogue number: ABML Program obtainable from: CPC Program Library, Queen's University of Belfast, Northern Ireland (see application form in this issue) Computer: IBM 370/155 and 370/158; Installation: The University of Akron, Akron, Ohio, USA Operating system: OS/MVT Programming language used: FORTRAN IV (G) High-speed store required: 14,000 words (56 kbt) at execution time Number of bits in a word: 32 Overlay structure: None Number of magnetic tapes required: None Other peripherals used: Card reader, line printer Number of cards in combined program and test deck: 1290 Card punching code: EBCDIC

Computation of line and continuum radiation from thermal radioastronomical sources

Title of program: RCMBLN Catalogue number: AAEG Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue). Computer: IBM 360/65; Installation: University College London Computer Centre. Operating system: OS Programming language used: FORTRAN IV High speed storage required: 25000 words No. of bits in a word: 32 Overlay structure: None No. of magnetic tapes required: 2 (optional) Other peripherals used: Card reader, line printer, card punch, (optional) disk(s). No. of cards in combined program and test deck: 1239 Card punching code: EBCDIC CPC Library subprograms used: Catalogue number: AAEH; Title: SELECT BN, CN VALUES; Ref. in CPC: This paper.

Numerical calculations of the irreducible representations of space groups

Title of program: SPACE GROUP REPRESENTATIONS Catalogue number: ACUA Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: CII 10070 CDC6600 Installation: Università di Firenze Operating system: SIRIS 7 Programming language used: FORTRAN IV High speed storage required: 46000 words No. of bits in a word: 32 Overlay structure: None No. of magnetic tapes required: None Other peripherals used: Printer, card reader, punch (optional) No. of cards in combined program and test deck: 2124 Card punching code: EBCDIC

ILTHII — Analysis of the spectrum of a thermal radioastronomical source

Title of program: ILTHII Catalogue number: AAEF Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue). Computer: IBM 360/65; Installation: University College London Computer Centre Operating system: OS Programming language used: FORTRAN IV High speed storage required: 24000 words. No. of bits in a word: 32 Overlay structure: Overlaid (29000 words required if not overlaid) No. of magnetic tapes required: None Other peripherals used: Card reader, line printer, card punch (optional) No. of cards in combined program and test deck: 4016 Card punching code: EBCDIC

A version of a nuclear optical model code for small computers designed to run on a PDP-15

Title of program: OPTIX KSU 1 Catalogue number: ACRR Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue). Computer: PDP-15; Installation: Department of Physics, Kansas State University, Manhattan, Kansas, USA. Operating system: BF Programming language used: Fortran IV High speed storage required: 14K words No. of bits in a word: 18 for integer variable. 2 words per floating-point variable. Overlay structure: Overlaid No. of magnetic tapes required: 2 PDP DEC tapes Other peripherals used: Lineprinter, typewriter, storage oscilloscope images No. of card images in combined program and test deck: 3660 Card punching code: ASCII Reference to other published version of this program: Catalogue no.: Title: Ref. in CPC: ABOU OPTICS 5 (1973) 69

Monte Carlo calculation of multiple scattering effects in thermal neutron scattering experiments

Title of program: SLOW NEUTRON MULTIPLE SCATTERING Catalogue number: ACIC Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: IBM 370/195; Installation: Argonne National Laboratory Operating system: OS/360, Release 21.7 Programming language used: FORTRAN IV High speed storage required: 75000 words. No. of bits in a word: 32 Overlay structure: None No. of magnetic tapes required: None Other peripherals used: Card reader, line printer, magnetic disk (up to three files) No. of cards in combined program and test deck: 5576 Card punching code: EBCDIC

A program for the analytic simulation of extensive air showers

Title of program: CASCADE Catalogue number: AAYF Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue). Computer: CDC 6600; Installation: Terminal at University of Sydney Operating system: Scope Programming language used: FORTRAN IV High speed storage required: 28K words No. of bits in a word: 60 Overlay structure: None No. of magnetic tapes required: None Other peripherals used: Card reader, line printer No. of cards in combined program and test deck: 940 Card punching code: BCD

Monte Carlo programs for calculating three-dimensional high-energy (50 MeV–500 GeV) hadron cascades in matter

Title of program: FLUKA Catalogue number: AAUH Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: CDC 6500, CDC 7600; Installation: CERN, Geneva Operating system: SCOPE 20 Programming language used: FORTRAN High speed storage required: 40, 000 words No. of bits in a word: 60 Overlay structure: None No. of magnetic tapes required: None Other peripherals used: Card reader and line-printer No. of cards in combined and test deck: 1975 Card punching code: BCD

MEDUSA a one-dimensional laser fusion code

Title of program: MEDUSA 1 Catalogue number: ABUG Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: ICL 4–70; Installation: UKAEA Culham Laboratory Operating system: ICL Multijob Programming languages used: STANDARD FORTRAN High speed store required: 45000 words. No. of bits in a word: 32 Overlay structure: None No. of magnetic tapes required: None Other peripherals used: Line printer No. of cards in combined program and test deck: 6316 Card punching code: EBCDIC CPC Library subprograms used: Catalogue number: Title: Ref. in CPC: ABUF OLYMPUS 7 (1974) 245

OLYMPUS a standard control and utility package for initial-value FORTRAN programs

Title of program: OLYMPUS Catalogue number: ABUF Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: ICL 4–70; Installation: UKAEA Culham Laboratory Operating system: ICL Multijob Programming languages used: STANDARD FORTRAN High speed store required ∗: 14464 words; No. of bits in a word: 32 Overlay structure: None No. of magnetic tapes required: None Other peripherals used: Line printer No. of cards in combined program and test deck: 2425 Card punching code: EBCDIC

Electron impact excitation cross sections

Title of program: POLORB Catalogue number: AAGW Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: Installation: CDC 7600 NCAR, Boulder, Colorado CDC 6600 ULCC, University of London ICL 1904S Queen Mary College, London Operating system: SCOPE, MAXIMOP Programming language used: FORTRAN IV High speed storage required: 31 kwords No. of bits in a word: 60 Overlay structure: None No. of magnetic tapes required: None Other peripherals used: Card reader, line printer No. of cards in combined program and test deck: 1722 Card punching code: CDC