22 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Interfaces"  
Results: 1 - 22
open access

Pattern formation by shock processes

Description: Shock waves in condensed media often produce and leave behind periodic patterns and textures. These patterns have been observed both in real time and in postmortem examination. In many cases the patterns can be related to analogous Pattern-forming mechanisms in classical fluid dynamics, such as the Rayleigh-Taylor and Helmholtz instabilities. In other cases, the textures arise from peculiarities in the dynamic stress state immediately behind the leading edge of the shock wave. Periodic waves in… more
Date: January 1, 1983
Creator: Shaner, J.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Review of the ANSI metafile and virtual device interface standardization activities

Description: The American National Standards Institute (ANSI) is developing several graphics standards. Two of these standards, the Virtual Device Metafile and the Virtual Device Interface, are reviewed. The purpose, basic concepts, and philosophy of these standards are discussed and contrasted with current practice and the proposed Graphical Kernel System Standard. The proposed Virtual Device Metafile has been accepted by the International Standards Organization as a new WG2 work item.
Date: January 1, 1983
Creator: Reed, T.N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Acquisition systems for heat transfer measurement

Description: Practical heat transfer data acquisition systems are normally characterized by the need for high-resolution, low-drift, low-speed recording devices. Analog devices such as strip chart or circular recorders and FM analog magnetic tape have excellent resolution and work well when data will be presented in temperature versus time format only and need not be processed further. Digital systems are more complex and require an understanding of the following components: digitizing devices, interface bu… more
Date: January 1, 1983
Creator: De Witt, R.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Brookhaven Segment Interconnect

Description: We have performed a high energy physics experiment using a multisegment Brookhaven FASTBUS system. The system was composed of three crate segments and two cable segments. We discuss the segment interconnect module which permits communication between the various segments.
Date: January 1, 1983
Creator: Morse, W.M.; Benenson, G.; Leipuner, L.B.; Larsen, R.C.; Black, J.K.; Blatt, S.R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Comparison of two slideline methods using ADINA

Description: Two general methods of treating sliding interface problems were implemented in ADINA. The first method uses constaint equations and is based on the work of Taylor, Hughes, et al. The second method is a penalty function method where finite stiffnesses are used to simulate the contact forces. This is similar to the method used by Hallquist in NIKE2D. These may be used as no-tension sliding interfaces, with or without friction, or as a non-sliding interface to interpolate between different mesh re… more
Date: January 1, 1983
Creator: Guerra, F. M. & Browning, R. V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

FASTBUS Segment Driver microcode description

Description: The FASTBUS Segment Driver, hereafter referred to as the FSD, is a list-driven, microcoded interface between the UNIBUS of a PDP-11 system and the FASTBUS. The list structure used by the FSD allows the programmer on the PDP-11 to program a sequence of data transfers to take place without the aid or intervention of the PDP-11. This allows the FASTBUS to be driven at FSD rates, independent of the PDP-11 processor. Due to the difference in speed between the FASTBUS and UNIBUS, the major goal of th… more
Date: June 1, 1983
Creator: Lesny, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Memory-mapped CAMAC branch driver

Description: In a distributed microprocessor-based control system, it may be necessary to interface with hardware configured in CAMAC. This note describes an interface between a VMEbus microcomputer and CAMAC.
Date: August 1, 1983
Creator: Shea, M.F. & Jones, A.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling the user in intelligent user interfaces

Description: A methodology for explicitly defining a model of a program's users and for evaluating the effectiveness of the user interface is presented. The development of an explicit user model will reduce user costs by both reducing the cost of software development and increasing user productivity. The components of the methodology are described, and an example of using the methodology in the development of an expert consultant system is given. The methodology can be useful in preliminary design and testi… more
Date: January 1, 1983
Creator: Stoddard, M.L. & Douglass, R.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

CAMAC interface for TPC data-acquisition electronics

Description: The Time Projection Chamber (TPC) is a detector used for high-energy physics research at the Stanford PEP Accelerator. TPC requires about 17,000 channels of data acquisition, which samples on command the input to each channel at a 10 MHz rate. This high data rate is made possible by means of Charge Coupled Devices (CCDs), intelligent digitizers, and a sophisticated trigger system. The TPC-CAMAC interface described here was developed to allow experiments of smaller scale than the complete TPC to… more
Date: June 1, 1983
Creator: Sidman, S.; Olson, S. & Jared, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Microcomputers and nondestructive test systems

Description: Microcomputers are finding their way into Nondestructive Testing (NDT) Systems. They can be used for scanning system motion control, instrumentation control, data acquisition, data display, and data analysis. This paper describes the application of the Digital Equipment Corporation (DEC), LSI-11 series microcomputers in systems developed and used by the NDT Unit of the Los Alamos National Laboratory. These systems are used for ultrasonic testing and industrial computerized tomography. In some s… more
Date: January 1, 1983
Creator: Strong, R. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Conduction heat transfer solutions

Description: This text is a collection of solutions to a variety of heat conduction problems found in numerous publications, such as textbooks, handbooks, journals, reports, etc. Its purpose is to assemble these solutions into one source that can facilitate the search for a particular problem solution. Generally, it is intended to be a handbook on the subject of heat conduction. There are twelve sections of solutions which correspond with the class of problems found in each. Geometry, state, boundary condit… more
Date: August 1, 1983
Creator: VanSant, J.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Status of the SLAC SNOOP diagnostic module for FASTBUS

Description: A SNOOP Diagnostic Module for FASTBUS is under development at SLAC. The SNOOP Module resides on a FASTBUS crate segment and provides diagnostic monitoring and testing capability. It consists of a high-speed ECL front-end to monitor and single-step segment operations, a simple master interface, and a control processor with two serial communication ports. Module features and specifications are summrized, and prototype hardware is shown.
Date: March 1, 1983
Creator: Walz, H.V. & Gustavson, D.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Numerical methods for tracking interfaces

Description: An overview is given of special numerical methods for tracking discontinuous fronts and interfaces. These methods include: surface tracking methods based on connected marker points along the interface, volume-tracking methods that track the volume occupied by the solution regions bounded by the interfaces, and moving mesh methods where the underlying mesh is aligned and moved with the interface. The pros and cons of the current methods are discussed, and a new method is proposed that overcomes … more
Date: January 1, 1983
Creator: Hyman, J.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Communicating between the IBM Personal Computer and the Wang word-processing system

Description: This manual outlines the steps for transferring documents to a Wang word processor from an IBM Personal Computer (PC) and for retrieving stored documents from the Wang. We first look at hardware and software needed to connect the two systems before detailing the steps to take in transferring a document.
Date: September 7, 1983
Creator: Downey, R. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Brookhaven Fastbus/Unibus Interface

Description: A typical high energy physics experiment requires both a high speed data acquisition and processing system, for data collection and reduction; and a general purpose computer to handle further reduction, bookkeeping and mass storage. Broad differences in architecture, format or technology, will often exist between these two systems, and interface design can become a formidable task. The PDP-11 series minicomputer is widely used in physics research, and the Brookhaven FASTBUS is the only standard… more
Date: January 1, 1983
Creator: Benenson, G.; Bauernfeind, J.; Larsen, R.C.; Leipuner, L.B.; Morse, W.M.; Adair, R.K. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Characterization of molybdenum interfacial crud in a uranium mill that employs tertiary-amine solvent extraction

Description: In the present work, samples of a molybdenum-caused green gummy interfacial crud from an operating western US uranium mill have been physically and chemically examined. Formaton of cruds of this description has been a long-standing problem in the use of tertiary amine solvent extraction for the recovery of uranium from low-grade ores (Amex Process). The crud is essentially an organic-continuous dispersion containing about 10 wt % aqueous droplets and about 37 wt % greenish-yellow crystalline so… more
Date: January 1, 1983
Creator: Moyer, B. & McDowell, W.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ziptrack manual

Description: A phenolic cart holding 3 mutually perpendicular search coils is moved through an luminum beam into the magnetic field. Coil voltages re integrated and digitized through a Data Translation 1712 ADC. The cart is controlled and the data is processed by an on-line PDP-11/05 computer. The results are displayed on a Tektronix 4010 terminal, stored on 9 track, 800 bpi tapes, and optionally recorded on a hard copy. Software on a floppy disk controls the system. The position of the cart is located by a… more
Date: July 1, 1983
Creator: Ito, A.; Bosworth, W.; Rutherford, J.; Lynch, A.; Tung, L. & Yang, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

3081//sub E/ processor

Description: Since the introduction of the 168//sub E/, emulating processors have been successful over an amazingly wide range of applications. This paper will describe a second generation processor, the 3081//sub E/. This new processor, which is being developed as a collaboration between SLAC and CERN, goes beyond just fixing the obvious faults of the 168//sub E/. Not only will the 3081//sub E/ have much more memory space, incorporate many more IBM instructions, and have much more memory space, incorporate… more
Date: March 1, 1983
Creator: Kunz, P. F.; Gravina, M.; Oxoby, G.; Trang, Q.; Fucci, A.; Jacobs, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Proceedings of the Flat-Plate Solar Array Project Research Forum on the design of flat-plate photovoltaic arrays for central stations

Description: The Flat-Plate Solar Array Project, managed by the Jet Propulsion Laboratory for the US Department of Energy, has focused on advancing technologies relevant to the design and construction of megawatt-level central-station systems. Photovoltaic modules and arrays for flat-plate central-station or other large-scale electric power production facilities require the establishment of a technical base that resolves design issues and results in practical and cost-effective configurations. The Central S… more
Date: January 1, 1983
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Light-scattering studies of lower-dimensional colloidal-particle and critical-fluid systems. Progress report, August 1, 1982-July 31, 1983

Description: We have extended the theoretical description of the lattice excitations in crystals formed of charged colloidal particle suspensions (CCPS) to include the effects of bounding surfaces. One of the new features that arises in a CCPS crystal confined by surfaces to form a film, is that propagating lattice waves cannot exist at the center of the Brillouin zone. Techniques have been developed to form systems of colloidal particles in monolayers on a water surface and on membranes. Transitions from g… more
Date: February 1, 1983
Creator: O'Sullivan, W. J. & Mockler, R. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Data acquisition using the 168/E. [CERN ISR]

Description: Event sizes and data rates at the CERN anti p p collider compose a formidable environment for a high level trigger. A system using three 168/E processors for experiment UA1 real-time event selection is described. With 168/E data memory expanded to 512K bytes, each processor holds a complete event allowing a FORTRAN trigger algorithm access to data from the entire detector. A smart CAMAC interface reads five Remus branches in parallel transferring one word to the target processor every 0.5 ..mu.… more
Date: March 1, 1983
Creator: Carroll, J. T.; Cittolin, S.; Demoulin, M.; Fucci, A.; Martin, B.; Norton, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Overview of Rayleigh-Taylor instability

Description: The aim of this talk is to survey Rayleigh-Taylor instability, describing the phenomenology that occurs at a Taylor unstable interface, and reviewing attempts to understand these phenomena quantitatively.
Date: January 1, 1983
Creator: Sharp, D. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen