Line Printer Research Articles

Automated limb blood flow plethysmograph

An automated limb blood flow plethysmograph has been developed and interfaced to a PDP-11/60 computer. This system automatically inflates blood pressure cuffs, calibrates strain gauges, provides real-time display of limb circumference changes, and provides digital output of limb blood flow and real-time graphic display of cuff pressure. The system has been designed to require a minimum amount of user interaction by providing automatic calibration in situ, which is initiated by depressing a switch, and automatic venous cuff inflation, which initiates computer analysis of blood flow data. Digital and graphic display of blood flow is provided on a computer terminal 12 s after the start of venous occlusion. All raw data are stored on a disk for optional postexperiment analysis, which enables each blood flow curve to be graphically displayed and reanalyzed under user control. Calculated data are stored on a disk for output to a line printer at the conclusion of an experiment. A trend plot of all analyzed blood flows can be displayed on a computer terminal anytime during an experiment.

On clustering with chernoff-type faces

Chernoff (1973) introduced a new procedure for representing multidimensional data by using cartoon-like faces drawn by a pen plotter, while Turner and Tidmore (1977) introduced asyrimetric Chernoff-type faces which can be generated on a line printer. The use of such faces for clustering multivariate data is a well known technique. However, there have been few attempts, to evaluate this graphical procedure in a systematic fashion. This paper reports results obtained in a comparison of the 1ine printer faces clustering method with several nongraphical hierarchical clustering algorithms, including single , compete , and average linkage and Ward's minimum variance method..

Tropospheric absorption and dispersion of millimeter and submillimeter waves

Abstract : Purpose: To compute the complex refractive index of the troposphere for frequencies from 1 to 1000 GHz: in particular, the amplitude and phase dispersion due to molecular oxygen and water vapor lines and the attenuation by suspended water droplets (radii or = 20 micrometers) such as haze, fog, and clouds. Description: This is a user-oriented program with descriptive comment statements. Inputs are prompted interactively on teh cathode-ray-tube (CRT) display. Graphical output is selectively displayed on the CRT or plotted in ink on paper (e.g. with an hp 9872A). A tabular output is available on the internal line printer.

Instructional graphics packages to be used with a line printer

Instructional graphics packages to be used with a line printer

A Computer Procedure to Map Citizens' Calls to the Police

This note describes a procedure to map the frequency and location of calls to the police. Maps may be generatedfor all calls in a city or limited to certain types of calls or certain geographic areas. Computer maps can be produced by line printers or by plotters. An empirical application of the procedure (an evaluation of the effects of an intervention program) is presented, and the strengths and limitations of the system are discussed. Problems in applying this computer technology are also considered.

UNIMOL: A program for Monte Carlo simulation of RRKM unimolecular decomposition in molecular beam experiments

Title of program: UNIMOL Catalogue number: AAoA Program obtainable form: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: IBM 3033N; Installation: Gothenburg Universities' Computing Centre Operating system: OS MVS-SP1, JES2 Programming language used: FORTRAN High speed storage required: 120832 words No. of bits in a word: 32 Overlay structure: none Peripherals used: card reader, line printer, card punch No of cards in combined program and test deck: 2222 Card punching code: EBCDIC

VMOMS — A computer code for finding moment solutions to the Grad-Shafranov equation

Title of program: VMOMS Catalogue number: ABSH Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (See application form in this issue) Computer: PDP-10/KL10; Installation: ORNL Fusion Energy Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA Operating system: TOPS 10 Programming language used: FORTRAN High speed storage required: 9000 words No. of bits in a word: 36 Overlay structure: none Peripherals used: line printer, disk drive No. of cards in combined program and test deck: 2839 Card punching code: ASCII

Two-dimensional adaptive quadrature over rectangular regions

Title of program: QADAPT Catalogue number: AAZA Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: Sperry Univac 1100/82; Installation: Madison Academic Computer Center Operating system: Exec 8 Programming language: FORTRAN 77 High speed storage required: variable; approx. 33000 words Number of bits in a word: 36 Overlay structure: none Peripherals: card reader, line printer Number of cards in combined program and test deck: 1229 Card punching code: EBCDIC

Queueing Network Models in Computer System Design

A professional typist at a computer terminal can type information into the machine at a rate of 120 words/minute. A student using the hunt-and-peck technique on the keyboard might manage 25 words/minute. Punched cards of information can be read by a machine at a rate of 300/minute, yet even this card reader is a very slow device. In the time it takes this high-priced unit to read a card, a modestly-priced central processing unit (CPU) can execute 100,000 addition operations or, more to the point, completely finish all computations for several average computer programs. Similar remarks apply to line printers and other input/output (I/O) devices such as magnetic drums, disks, and tape drives. For this reason, modern computer systems incorporate both autonomous peripheral devices, that is, input/output devices capable of operating concurrently with the CPU, and multiprogramming, a mode of operation in which several programs are allowed to reside in the main memory of the computer at once, so that when one program requests an I/O operation, the CPU can be switched immediately to another waiting program. Although this concurrent operation of CPU and I/O devices would seem to make the most efficient use of the equipment, serious problems can and do arise. As more jobs compete for the available resources, congestion and job queues develop, and performance (in the eyes of the individual user) suffers. Thus those who design and evaluate such

A non-iterative method for solving PDE's arising in electron scattering

Title of program: SEPDE Catalogue number: AANP Program obtainable from: CPC Program Library, Queens University of Belfast, N. Ireland (see application form in this issue) Computer: IBM 360/91; Installation: Goddard Space Flight Center, Greenbelt, MD 20771 Operating system: HASP/OS MVT Programming language used: Fortran IV High speed storage required: see note added in proof Number of bits in a word: 32 Overlay structure: none Number of magnetic tapes required: none Other peripherals used: line printer, discs or magnetic tape No. of cards in combined program and text deck: 356 Card punching code: EBCDIC

A program for the predictor-corrector numerov method

Title of program: PCNUM Catalogue number: AARJ Program ontainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: IBM 370/3031; Installation: University of Windsor Computer Centre Operating system: OSMVT under VM Programming language used: FORTRAN IV High speed storage required: 10 Kwords (for 8 channels) No. of bits in a word: 32 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: 829 Card punching code: EBCDIC

An adaptation of ACQI to calculate the data for MSXALPHA program

Title of adaptation: ADAPT HFS FOR MSXALPHA Adaptation number: 0001 Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Reference to original program Cat. number: ACQI; Title: H.F.S. SELF-CONSISTENT FIELD; Ref. in CPC: 1 (1969) 216 Author of original program: J.-P. Desclaux Computer: Amdahl 470/V7; Installation: University of Alberta, Edmonton, Canada Operating system: MTS Programming language used in adapted program: FORTRAN IV High-speed core required: 75656 bytes Number of bits in a byte: 8 Peripherals used: card reader, line printer, disk No. of cards required to effect adaptation (including directive cards): 254 Card punching code: EBCDIC 027

3次元動態計測システムとその応用

A measurement system for the three-dimensional position using "SELSPOT" is shown, which has many advantages over the methods with photographs, movies, or other devices, with respect to its on-line measurement, easy operation, fast sampling, fast data processing, and high accuracy. This is important in view of the application that the display of the analyzed data is required soon after the measurement, such as the experiment of sports physiology and rehabilitation. The system is constructed with a measurement subsystem and an analyzing subsystem. The measurement subsystem is constructed with the dual two-dimensional measurement device which is named "SELSPOT", a communication and timing controller, microcomputer for the filing of the data, and external memory devices. The analyzing subsystem is constructed with the random scan type graphic display with the light pen and ten-keyboard for the interactive analysis, the line printer for the numerical data, and the x-y plotter for the hard copy of the screen. This paper proposes a precise method with which the three-dimensional position is calculated from the dual two-dimensional data. This method defines it as the generalized inverse of the characteristic equation on the camera and the detective device, or the middle point of the segment which determines the minimum length of the two principle rays. By the analysis of the detective device and the lens system, the three factors of the following measurement errors and the methods of their compensation is considered: the non-linearity of the position sensitive detector with the distance between the camera and the LED, the interference of the lightning in the experiment room, and the distortion of the lens. On the other hand, this paper also proposes a new method for camera setting which causes the least error in the calculated data. In the results, the worst accuracy is ±0.4% with error compensation, and ±2.0% without the compensation, respectively. In addition, as the software of the analyzing subsystem realizes the interactive processing and the sufficient function, the period for the display and analysis of the three-dimensional movement is shortened.

Statistical package for analysis of competition ELISA results

A computation and analysis program has been assembled to facilitate the use of competition ELISA and similar assays for studies of antigen regulation and turnover. The program fits sigmoidal standard curves using a 4-parameter logistic function, determines amounts of antigen from the equation which defines the standard curve, and calculates specific activities by linear regression of the levels of antigen in varying amounts of total protein. An optional weighting function is provided to adjust for systematic non-uniform variance. Outlying points are identified during the linear regression, and the user may delete them or redefine the acceptable working range of the standard curve. The program provides a complete print-out of the data and optional plots of the fitted standard curve and the regression analysis of the samples, as well as statistics which are useful for quality control. It also provides the option of storing the data points from the standard curve on magnetic diskettes. The package is written in BASIC for a Wang Model 2200 computer equipped with a magnetic diskette drive, line printer, and flat-bed X–Y plotter, but it is readily adaptable to other systems and input/output devices.

Paper noise in an impact line printer

In many paper handling machines, the sound radiated from impacts on paper is a major noise source. It is shown that in typical impact line printers both nonresonant and resonant paper vibration are significant mechanisms of sound generation. Both can probably be controlled by increasing the backing bar stiffness of the printer while keeping the printing force constant. The paper–hammer impact on the backing bar dominates paper impact noise below 1250 Hz. Above 2500 Hz the hammer impact on the paper is the dominant source. From 1250–2500 Hz the two impacts contribute equally to the sound generation. Finally, consideration of the design of a ’’quiet’’ paper leads to the suggestion of a paper with high density and low bending rigidity. This might be accomplished through microcreping of the paper.

Preliminary study of Landsat digital data related to parts of Chandrapur project area, Maharashtra

This paper mainly projects the attempts made in analysing the computer line printer outputs of bands 4,5 and 7 obtained from Landsat digital data, with reference to a selected area of Chandrapur project in Chandrapur district, Maharashtra. The distinction into various landuse patterns has been carried out on the printed outputs and they have been compared with the available toposheets ane aerial photos.

Printer Technology in IBM

Major developments in printer technology have occurred during the past twenty-five years. Improvements in such areas as performance, reliability, and product cost are described in this paper, along with many of the IBM impact printer products embodying these developments, beginning with the well-known 1403 Line Printer.

Minicomputer oriented software for interpretation of landsat and GOES digital data

Data obtained from land resources satellites, such as Landsat, and from meteorological satellites, such as GOES, can be used in many ways for increasing the available information on mineral and water resources, land-use land-cover, the status of crops and vegetation, forest and savannah fires, and of course, on the atmospheric conditions, and in many other fields. Data obtained in digital form as reflectance of terrain and clouds are rarely used by the interested user, because of difficulties in obtaining adequate facilities and techniques for displaying the digital data, registering the display with conventional maps, and interpreting the results. The authors have developed a series of programs readily transferable to any minicomputer (required configuration central processing unit minimum 64K, disk, tape drive, and line printer), that can be used for the purpose of displaying, registering and interpreting Landsat and GOES digital data practically for any purpose compatible with the characteristics of the collected data. The programmes were tested on three different computer configurations and used for the solution of several significant problems.

Microcomputerized Facility For On-Line Spectroscopic Plasma Diagnostics

Temperature distributions and species densities can be determined in cylindrical plasmas by using the Abel inversion technique to obtain the volumetric emission coefficient from lateral radiance measurements on optically thin spectral lines. These diagnostics are especially useful for studying arcs and glow discharges. Extensive spectroscopic measurements and data analysis routines are required for each determination, and user-interactive judgments are required at several points in the analysis. We have interfaced a Polymorphic 8813 microprocessor-based computer with our spectroscopic instruments for this task. The computer speaks BASIC and has 56 kbytes of user-available RAM. An S-100 compatible analog interface board is used for control of an optical spectrometer and a translation stage, as well as for digitization of the data in real time. Software was written for filing the data on mini-floppy disks, performing data analysis, and printing or plotting the results with a small line printer or with an X-Y recorder. We were able to obtain a reliable and productive facility without large capital equipment outlays because of the modest cost of the microprocessor-based computer and its ability to interact with the expensive equipment that was already on hand.

Level population densities and line intensities in helium discharges at intermediate pressures. (GB)

Title of adaptations: CORRELATION FACTOR AND NMR Adaptation number: 0001 Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Reference to original program: Catalogue number: ACKO; Title: RANDOM VACANCY MIGRATION; Ref. in CPC: preceding paper Authors of original program: D. Wolf and K. Differt Peripherals used: Card reader, line printer, card punch, extended core storage (310008 words) No. of cards required to effect adaptation: 169