Sample records for direct digital controls

  1. Direct Digital Control in Air Conditioning Systems for Energy Efficiency 

    E-Print Network [OSTI]

    Liu, W.; Ye, A.; Li, D.

    2006-01-01T23:59:59.000Z

    connected by lines that represent the data flow. The process is depicted with symbols as on electrical schematics and pneumatic control diagrams. Graphical diagrams are created and the detailed data is entered in background menus or screens... and control system Energy management and control system (EMCS) technology has evolved over the past three decades from pneumatic and mechanical devices to direct digital controls (DDC) or computer-based controllers and systems. Today's EMCS systems...

  2. Adaptive optimal control: an algorithm for direct digital control

    SciTech Connect (OSTI)

    Farris, D.R.; McDonald, T.E.

    1980-01-01T23:59:59.000Z

    An algorithm for applying advanced control concepts in heating, ventilating, and air conditioning (HVAC) systems has been developed at the Los Alamos Scientific Laboratory (LASL). The algorithm uses optimal control and is adaptive in nature. Simulations for a solar heated and cooled building indicate that use of this algorithm can accomplish a substantial savings in auxiliary energy consumption. In this paper, the algorithm is described and its application is illustrated with a simple example. Simulation results for a more complex system are also presented. The hardware, including the digital computer, needed to implement this algorithm is briefly discussed.

  3. Direct Digital Control- A Tool for Energy Management of HVAC Systems

    E-Print Network [OSTI]

    Swanson, K.

    Direct digital control (DDC) applied to heating, ventilating, and air-conditioning (HVAC) systems corrects many of the deficiencies of conventional automatic temperature control systems. By applying new control sequences, DDC optimizes HVAC energy...

  4. Direct Digital Control in Air Conditioning Systems for Energy Efficiency

    E-Print Network [OSTI]

    Liu, W.; Ye, A.; Li, D.

    2006-01-01T23:59:59.000Z

    With the rapid development of Intelligent Buildings (IB), the Building Automation System (BAS) has come to control and manage the equipment in the building more and more scientifically, economically and rationally, which can not only raise...

  5. Digital control of HVDC converters

    SciTech Connect (OSTI)

    Pilotto, L.A.S.; Roitman, M.; Alves, J.E.R.

    1989-05-01T23:59:59.000Z

    This paper presents the project of a completely digital HVDC converter controller based on a 16-bit microcomputer. It was decided to achieve as much as possible by software in order to minimize functions performed by external hardware. The presented design comprises software programmed functions such as a PID current control amplifier, voltage dependent current order limiters and an alpha-minimum symmetrization unit, among others. HVDC control principles are briefly reviewed and a detailed description of both the hardware and software structure of the controller is presented. The digital controller was implemented in an HVDC simulator and several dynamic performance tests demonstrated the efficiency of the proposed methodology.

  6. Direct-to-digital holography and holovision

    DOE Patents [OSTI]

    Thomas, Clarence E. (Knoxville, TN); Baylor, Larry R. (Knoxville, TN); Hanson, Gregory R. (Clinton, TN); Rasmussen, David A. (Knoxville, TN); Voelkl, Edgar (Oak Ridge, TN); Castracane, James (Albany, NY); Simkulet, Michelle (Latham, NY); Clow, Lawrence (Waterford, NY)

    2000-01-01T23:59:59.000Z

    Systems and methods for direct-to-digital holography are described. An apparatus includes a laser; a beamsplitter optically coupled to the laser; a reference beam mirror optically coupled to the beamsplitter; an object optically coupled to the beamsplitter, a focusing lens optically coupled to both the reference beam mirror and the object; and a digital recorder optically coupled to the focusing lens. A reference beam is incident upon the reference beam mirror at a non-normal angle, and the reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form an image. The systems and methods provide advantages in that computer assisted holographic measurements can be made.

  7. Centralized digital control of accelerators

    SciTech Connect (OSTI)

    Melen, R.E.

    1983-09-01T23:59:59.000Z

    In contrasting the title of this paper with a second paper to be presented at this conference entitled Distributed Digital Control of Accelerators, a potential reader might be led to believe that this paper will focus on systems whose computing intelligence is centered in one or more computers in a centralized location. Instead, this paper will describe the architectural evolution of SLAC's computer based accelerator control systems with respect to the distribution of their intelligence. However, the use of the word centralized in the title is appropriate because these systems are based on the use of centralized large and computationally powerful processors that are typically supported by networks of smaller distributed processors.

  8. Digital Mapping Of Structurally Controlled Geothermal Features...

    Open Energy Info (EERE)

    GPS Units And Pocket Computers Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Digital Mapping Of Structurally Controlled Geothermal Features...

  9. Digital Mapping Of Structurally Controlled Geothermal Features...

    Open Energy Info (EERE)

    Gps Units And Pocket Computers Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Digital Mapping Of Structurally Controlled Geothermal Features...

  10. Digital control networks for virtual creatures 

    E-Print Network [OSTI]

    Bainbridge, Christopher James

    2010-01-01T23:59:59.000Z

    Robot control systems evolved with genetic algorithms traditionally take the form of floating-point neural network models. This thesis proposes that digital control systems, such as quantised neural networks and logical ...

  11. Improved Engine Control Strategies Enabled by Digital Signal...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Control Strategies Enabled by Digital Signal-Processing Method for Zirconia Exhaust Sensors Improved Engine Control Strategies Enabled by Digital Signal-Processing Method for...

  12. Fresnel Incoherent Digital Holograms Directly Recorded by Multiple Viewpoint Projections

    E-Print Network [OSTI]

    Rosen, Joseph

    Fresnel Incoherent Digital Holograms Directly Recorded by Multiple Viewpoint Projections Natan T a modified Fresnel hologram under incoherent illumination by directly processing the projections of the three by presenting a new and direct method of synthesizing a modified Fresnel hologram using the MVPs. In Refs. [2

  13. Digital Surveying Directional Surveying Specialists | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOE Facility DatabaseMichigan:Dewey-Humboldt,DickensonDiengDigital

  14. Digital control strategies for switch-mode power supply

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Digital control strategies for switch-mode power supply Xuefang Lin-Shi, Bruno Allard, Senior and a request for large regulation bandwidth. Digital control is now experi- mented for low-power low control. Fig. 1. Schematic synchronous step-down SMPS Digital control is not new in the field of Power

  15. Digital Strategies Group Provide direction and strategic planning for the libraries' development of digital activities that focus on

    E-Print Network [OSTI]

    Schweik, Charles M.

    Digital Strategies Group Charge: Provide direction and strategic planning for the libraries' development of digital activities that focus on digital content that is created or collected by the libraries within the libraries of current and emerging issues related to digital content such as rights management

  16. A Framework for Flexible Access Control in Digital Library Systems

    E-Print Network [OSTI]

    Ray, Indrajit

    A Framework for Flexible Access Control in Digital Library Systems Indrajit Ray and Sudip. Traditional access control models are often found to be inadequate for digital libraries. This is because the user population for digital libraries is very dynamic and not completely known in advance. In addition

  17. Unconventional digital reactor control without conventional programming

    SciTech Connect (OSTI)

    Edwards, R.M.; Johns, R.M.; Kenney, S.J. [Pennsylvania State Univ., University Park, PA (United States)

    1995-12-31T23:59:59.000Z

    Recent advances in simulation technology have resulted in the capability to design, test, and implement advanced control algorithms without the need for the labor-intensive effort of writing and debugging of computer programs. This technology has been adopted for a program of experimental development of power reactor control, which is jointly sponsored by the National Science Foundation and the Electric Power Research Institute. The experimental reactor control test bed utilizes the General Atomic Mark III TRIGA reactor at the Penn State Breazeale reactor facility. Control experiments are conducted within the movable experiment technical specifications of the TRIGA. A digital controller with an experimental control algorithm is interfaced to a secondary control rod (SCR). The new technology presented in this paper utilizes a UNIX network-compatible microprocessor-based controller operating under the Wind River Systems VxWorks real-time operating system. The controller interfaces with the Math-works MATLAB/SIMULINK development environment and Real-Time Innovations 8 monitoring software remotely operated on a SPARC workstation.

  18. Minimum Phase Response in Digitally Controlled Boost and Flyback Converters

    E-Print Network [OSTI]

    - This paper addresses modeling and control issues related to practical high-frequency digital PWM control/D sampling, modulator sampling, and delays in the digital control loop [5]. Discrete-time models are derived signal models. Approximate closed-form results are derived for the zero in the discrete-time control

  19. Recording multiple spatially-heterodyned direct to digital holograms in one digital image

    DOE Patents [OSTI]

    Hanson, Gregory R. (Clinton, TN); Bingham, Philip R. (Knoxville, TN)

    2008-03-25T23:59:59.000Z

    Systems and methods are described for recording multiple spatially-heterodyned direct to digital holograms in one digital image. A method includes digitally recording, at a first reference beam-object beam angle, a first spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; Fourier analyzing the recorded first spatially-heterodyned hologram by shifting a first original origin of the recorded first spatially-heterodyned hologram to sit on top of a first spatial-heterodyne carrier frequency defined by the first reference beam-object beam angle; digitally recording, at a second reference beam-object beam angle, a second spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; Fourier analyzing the recorded second spatially-heterodyned hologram by shifting a second original origin of the recorded second spatially-heterodyned hologram to sit on top of a second spatial-heterodyne carrier frequency defined by the second reference beam-object beam angle; applying a first digital filter to cut off signals around the first original origin and define a first result; performing a first inverse Fourier transform on the first result; applying a second digital filter to cut off signals around the second original origin and define a second result; and performing a second inverse Fourier transform on the second result, wherein the first reference beam-object beam angle is not equal to the second reference beam-object beam angle and a single digital image includes both the first spatially-heterodyned hologram and the second spatially-heterodyned hologram.

  20. Off-axis illumination direct-to-digital holography

    DOE Patents [OSTI]

    Thomas, Clarence E.; Price, Jeffery R.; Voelkl, Edgar; Hanson, Gregory R.

    2004-06-08T23:59:59.000Z

    Systems and methods are described for off-axis illumination direct-to-digital holography. A method of recording an off-axis illuminated spatially heterodyne hologram including spatially heterodyne fringes for Fourier analysis, includes: reflecting a reference beam from a reference mirror at a non-normal angle; reflecting an object beam from an object at an angle with respect to an optical axis defined by a focusing lens; focusing the reference beam and the object beam at a focal plane of a digital recorder to form the off-axis illuminated spatially heterodyne hologram including spatially heterodyne fringes for Fourier analysis; digitally recording the off-axis illuminated spatially heterodyne hologram including spatially heterodyne fringes for Fourier analysis; Fourier analyzing the recorded off-axis illuminated spatially heterodyne hologram including spatially heterodyne fringes by transforming axes of the recorded off-axis illuminated spatially heterodyne hologram including spatially heterodyne fringes in Fourier space to sit on top of a heterodyne carrier frequency defined as an angle between the reference beam and the object beam; applying a digital filter to cut off signals around an original origin; and then performing an inverse Fourier transform.

  1. Modern Boiler Control and Why Digital Systems are Better

    E-Print Network [OSTI]

    Hughart, C. L.

    1983-01-01T23:59:59.000Z

    mothballed. Improved flue gas analyzers and digital controls are replacing less efficient and less reliable control hardware. As the production of steam becomes decentralized, control systems needed to meet expanded plant objectives must be installed...

  2. A digital controlled solar array regulator employing the charge control

    SciTech Connect (OSTI)

    Cho, Y.J.; Cho, B.H. [Seoul National Univ. (Korea, Republic of)

    1997-12-31T23:59:59.000Z

    A microprocessor controlled SAR system is presented. The inner analog loops employing the charge current control scheme continuously regulate the solar array output power according to the reference value generated by the ECU. The ECU consists of the peak power tracking and the battery charge current regulation algorithm. Modeling, analysis and a design procedure of the inner loops and the system loop are presented taking into account of interaction between the inner analog loops and the outer digital loops. Utilizing the inherent characteristics of the inner voltage and current loop, the system dynamic performance and stability can be optimized up to the speed limit of the microprocessor.

  3. Colloidal Micromotors: Controlled Directed Motion

    E-Print Network [OSTI]

    Baraban, Larysa; Makarov, Denys; Leiderer, Paul; Erbe, Artur

    2008-01-01T23:59:59.000Z

    Here we demonstrate a synthetic micro-engine, based on long-range controlled movement of colloidal particles, which is induced by a local catalytic reaction. The directed motion at long timescales was achieved by placing specially designed magnetic capped colloids in a hydrogen peroxide solution at weak magnetic fields. The control of the motion of the particles was provided by changes of the concentration of the solution and by varying the strength of the applied magnetic field. Such synthetic objects can then be used not only to understand the fundamental driving processes but also be employed as small motors in biological environments, for example, for the transportation of molecules in a controllable way.

  4. Colloidal Micromotors: Controlled Directed Motion

    E-Print Network [OSTI]

    Larysa Baraban; Christian Kreidler; Denys Makarov; Paul Leiderer; Artur Erbe

    2008-07-10T23:59:59.000Z

    Here we demonstrate a synthetic micro-engine, based on long-range controlled movement of colloidal particles, which is induced by a local catalytic reaction. The directed motion at long timescales was achieved by placing specially designed magnetic capped colloids in a hydrogen peroxide solution at weak magnetic fields. The control of the motion of the particles was provided by changes of the concentration of the solution and by varying the strength of the applied magnetic field. Such synthetic objects can then be used not only to understand the fundamental driving processes but also be employed as small motors in biological environments, for example, for the transportation of molecules in a controllable way.

  5. A New Argus Direct Conversion Receiver and Digital Array Receiver/Processor

    E-Print Network [OSTI]

    Ellingson, Steven W.

    A New Argus Direct Conversion Receiver and Digital Array Receiver/Processor Grant Hampson and Steve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 References 20 Appendix A: Direct Conversion FPGA Source Code 21 Appendix B: Digital Receiver system. The new architecture consists of four main components: a Direct Conversion Receiver (DCR

  6. Mistake #3: Digitally controlled analog processing

    E-Print Network [OSTI]

    Maher, Robert C.

    -digital solution and puts your machine in the junk heap. LESSON LEARNED: Design the processor and its programming- out the intervention of the accountants. LESSON LEARNED: Make sure there's enough processing power that the resources will be suffi- cient to solve it. LESSON LEARNED: Don't mess with hybrid solutions if a digital

  7. Modern Boiler Control and Why Digital Systems are Better 

    E-Print Network [OSTI]

    Hughart, C. L.

    1983-01-01T23:59:59.000Z

    MODERN BOILER CONTROL AND WHY DIGITAL SYSTEMS ARE BETTER C. L. Hughart Engineering and Hydrocarbons Division Union Carbide Corporation South Charleston, West Virginia ABSTRACT o Fuel o Combustion Air Steam generation in petrochemical... of the advantages of digital boiler controls. This system was in stalled to control two 350,000-pound per hour, 600 psig auxiliary fired boilers which, augmented by other waste heat recovery equipment, will supply the steam for a large petrochemical plant...

  8. A DIGITAL CONTROL SYSTEM FOR OPTIMAL OXYGEN TRANSFER

    E-Print Network [OSTI]

    A DIGITAL CONTROL SYSTEM FOR OPTIMAL OXYGEN TRANSFER EFFICIENCY Arnold Schwarzenegger Governor system ............................. 10 5.2 Types of aeration processes of fine bubble diffusers for sub-surface aeration ............ 13 5.5 Process design considerations

  9. A digital-based excitation system for generator voltage control

    SciTech Connect (OSTI)

    D'Antonio, M.J.; Lawson, R.A.; Pearson, W.R. (General Electric Co., Salem, VA (US)); Speer, G.W. (General Electric Canada, Peterborough, Ontario (CA)); Crenshaw, M.L.; Murdoch, A. (GE Industrial and Power Systems, Power Systems Engineering Dept., Schenectady, NY (US))

    1991-01-01T23:59:59.000Z

    Excitation systems have evolved over the years as new technology is introduced, offering easier implementations, higher reliability, less maintenance, enhanced functionality, and user friendly interfaces. Microprocessor based controls are now common in electric drives, protective relaying, turbine controls, power plant displays and supervisory control functions. The flexibility, functionality, and user friendly interface capabilities of digital controls are now available for excitation systems. This paper provides an overview of GE's first generation digital excitation system, SILCO 5, and an introduction to GE's second generation system, EX2000, currently in development.

  10. From Basic Control to Optimized Systems-Applying Digital Control Systems to Steam Boilers

    E-Print Network [OSTI]

    Hockenbury, W. D.

    1982-01-01T23:59:59.000Z

    This presentation examines the application of Distributed Digital Controls in order to review the application of this recent control technology towards Steam Boilers in a step-by-step manner. The main purpose of a steam generating boiler...

  11. HVDC control system based on parallel digital signal processors

    SciTech Connect (OSTI)

    Maharsi, Y.; Do, V.Q.; Sood, V.K.; Casoria, S.; Belanger, J. [Hydro-Quebec, Varennes, Quebec (Canada)] [Hydro-Quebec, Varennes, Quebec (Canada)

    1995-05-01T23:59:59.000Z

    A numerical HVDC control system operating in real time has been developed for a simulator to be used for operator training. The control system, implemented with digital signal processors (DSPs), consists of typical HVDC control functions such as the synchronizing unit, the regulation unit, the protection unit, the firing unit, the tap changer and the reactive power regulation unit. Results from the steady-state and the transient performance validation tests carried out on the IREQ power system simulator are provided.

  12. Digital regulation of a phase controlled power converter

    SciTech Connect (OSTI)

    Schultheiss, C.; Haque, T.

    1995-12-01T23:59:59.000Z

    The Relativistic Heavy Ion Collider, now in construction at Brookhaven National Laboratory, will use phase controlled power converters for the main dipole and quadrupole magnet strings. The rectifiers in these power supplies will be controlled by a digital regulator based on the TI 320C30 Digital Signal Processor (DSP). The DSP implements the current loop, the voltage loop, and a system to actively reduce the sub-harmonic ripple components. Digital firing circuits consisting of a phase locked lop and counters are used to fire the SCRs. Corrections for the sub-harmonic reduction are calculated by the DSP and stored in registers in the firing circuit. These corrections are added in hardware, to the over-all firing count provided by the DSP. the resultant count is compared to a reference counter to fire the SCRs. This combination of a digital control system and the digital firing circuits allows the correction of the sub-harmonics in a real-time sense. A prototype of the regulator has been constructed, and the preliminary testing indicates a sub-harmonic reduction of 60 dB.

  13. Digit Ratio Predicts Sense of Direction in Women

    E-Print Network [OSTI]

    Chai, Xiaoqian

    The relative length of the second-to-fourth digits (2D:4D) has been linked with prenatal androgen in humans. The 2D:4D is sexually dimorphic, with lower values in males than females, and appears to correlate with diverse ...

  14. Apparatus for direct-to-digital spatially-heterodyned holography

    DOE Patents [OSTI]

    Thomas, Clarence E.; Hanson, Gregory R.

    2006-12-12T23:59:59.000Z

    An apparatus operable to record a spatially low-frequency heterodyne hologram including spatially heterodyne fringes for Fourier analysis includes: a laser; a beamsplitter optically coupled to the laser; an object optically coupled to the beamsplitter; a focusing lens optically coupled to both the beamsplitter and the object; a digital recorder optically coupled to the focusing lens; and a computer that performs a Fourier transform, applies a digital filter, and performs an inverse Fourier transform. A reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form a spatially low-frequency heterodyne hologram including spatially heterodyne fringes for Fourier analysis which is recorded by the digital recorder, and the computer transforms the recorded spatially low-frequency heterodyne hologram including spatially heterodyne fringes and shifts axes in Fourier space to sit on top of a heterodyne carrier frequency defined by an angle between the reference beam and the object beam and cuts off signals around an original origin before performing the inverse Fourier transform.

  15. A DIGITAL CONTROL SYSTEM FOR OPTIMAL OXYGEN TRANSFER

    E-Print Network [OSTI]

    A DIGITAL CONTROL SYSTEM FOR OPTIMAL OXYGEN TRANSFER EFFICIENCY Arnold Schwarzenegger Governor wastewater treatment not only focus on effluent quality, but also energy consumption Background Terminology and Discussion #12;3 Introduction Activated Sludge Process Aeration needs energy (45~75% of the total) Fine

  16. A DIGITAL CONTROL SYSTEM FOR OPTIMAL OXYGEN TRANSFER

    E-Print Network [OSTI]

    A DIGITAL CONTROL SYSTEM FOR OPTIMAL OXYGEN TRANSFER EFFICIENCY Arnold Schwarzenegger Governor operations improvement (i.e., operators training, cleaning frequency and methods, process upgrade, etc audits specialist ­ Henryk Melcer Brown & Caldwell, process designer ­ Rod Reardon Camp, Dresser, and Mc

  17. CMOSET 2006Digitally Controlled SMPS 1University of Toronto

    E-Print Network [OSTI]

    Ng, Wai Tung

    ) Power Source · Li-ion · Li-Polymer · Fuel Cell ? #12;CMOSET 2006Digitally Controlled SMPS 5University Protection · UVLO, OVP · OCP, soft-start, etc. · Diagnostics, synchronization "SMART" Features · Multi-mode operation (PWM, PFM, DCM) · Diagnostics · Fully configurable Cost · Size of passives (L,C) · Parts count

  18. Self-Programmable PID Compensator for Digitally Controlled SMPS

    E-Print Network [OSTI]

    Prodiæ, Aleksandar

    Self-Programmable PID Compensator for Digitally Controlled SMPS Zhenyu Zhao and Aleksandar Prodi) that automatically adjusts parameters of PID compensator based on pre-specified bandwidth requirements. The PID at the corner frequency of the power stage. Then, the gain of the PID compensator is found from the oscillations

  19. A digital excitation control system for use on brushless excited synchronous generators

    SciTech Connect (OSTI)

    Godhwani, A. [Southern Illinois Univ., Edwardsville, IL (United States)] [Southern Illinois Univ., Edwardsville, IL (United States); Basler, M.J. [Basler Electric Co., Highland, IL (United States)] [Basler Electric Co., Highland, IL (United States)

    1996-09-01T23:59:59.000Z

    Automatic voltage regulators for small to medium size brushless excited synchronous generators have traditionally utilized analog electronics. Modern voltage regulator systems are beginning to utilize the power, flexibility, and cost advantage of the microprocessor for control. Furthermore, digital voltage regulators have the added advantage of ease of compensator custom-design. This paper presents a new method for determining the stability parameters for small/medium size generators that have limited effect on overall system stability. A Digital Excitation Control System (DECS) is used as a platform for this discussion. DECS utilizes a discrete Proportional, Integral and Derivative (PID) control algorithm. A direct design (Pole Placement) method for selecting PID parameters is presented along with the test results.

  20. Integrated Control-Path Design and Error Recovery in the Synthesis of Digital

    E-Print Network [OSTI]

    Chakrabarty, Krishnendu

    11 Integrated Control-Path Design and Error Recovery in the Synthesis of Digital Microfluidic Lab-on-Chip YANG ZHAO, TAO XU, and KRISHNENDU CHAKRABARTY Duke University Recent advances in digital microfluidics that incorporates control paths and an error- recovery mechanism in the design of a digital microfluidic lab

  1. Susceptibility of digital instrumentation and control systems to disruption by electromagnetic interference

    SciTech Connect (OSTI)

    Kercel, S.W.; Korsah, K.; Wood, R.T.

    1997-10-01T23:59:59.000Z

    The potential for disruption of safety-related digital instrumentation and control (I and C) systems by electromagnetic interference/radio-frequency interface (EMI/RFI) bears directly on the safe operation of advanced reactors. It is anticipated that the use of digital I and C equipment for safety and control functions will be substantially greater for advanced reactor designs than for current-generation nuclear reactors, which primarily use analog I and C equipment. In the absence of significant operational experience, the best available indication of the potential vulnerability of advanced digital safety systems to EMI/RFI comes from environmental testing of an experimental digital safety channel (EDSC) by the Oak Ridge National Laboratory (ORNL). The EDSC is a prototypical system representative of advanced reactor safety system designs with regard to architecture, functionality and communication protocols, and board and component fabrication technologies. An understanding of the electromagnetic environment to be expected for advanced reactors can be drawn from ORNL`s survey of ambient EMI/RFI conditions in the current generation of nuclear power plants. A summary of the results from these research efforts is reported in this paper. The lessons learned from the EMI/RFI survey and the EDSC tests contribute significantly to determining the best approach to assuring electromagnetic compatibility for the safety-related I and C systems of advanced reactors.

  2. Nitrogen Control in Electric Arc Furnace Steelmaking by Direct...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Nitrogen Control in Electric Arc Furnace Steelmaking by Direct Reduced Iron Fines Injection Nitrogen Control in Electric Arc Furnace Steelmaking by Direct Reduced Iron Fines...

  3. Multiparty-controlled quantum secure direct communication

    SciTech Connect (OSTI)

    Xiu, X.-M., E-mail: xiuxiaomingdl@126.com; Dong, L.; Gao, Y.-J.; Chi, F. [Bohai University, Physics Department (China)

    2007-12-15T23:59:59.000Z

    A theoretical scheme of a multiparty-controlled quantum secure direct communication is proposed. The supervisor prepares a communication network with Einstein-Podolsky-Rosen pairs and auxiliary particles. After passing a security test of the communication network, a supervisor tells the users the network is secure and they can communicate. If the controllers allow the communicators to communicate, the controllers should perform measurements and inform the communicators of the outcomes. The communicators then begin to communicate after they perform a security test of the quantum channel and verify that it is secure. The recipient can decrypt the secret message in a classical message from the sender depending on the protocol. Any two users in the network can communicate through the above processes under the control of the supervisor and the controllers.

  4. A Current-Sensorless Digital Controller for Active Power Factor Correction Control Based on Kalman Filters

    E-Print Network [OSTI]

    Kimball, Jonathan W.

    A Current-Sensorless Digital Controller for Active Power Factor Correction Control Based on Kalman, by replacing the sensor with a Kalman filter, which is essentially a stochastic observer. Experimental results-power techniques are undesirable and the current sensor is too expensive. A Kalman filter [7] can be used

  5. Direct Reed-Muller Transform of Digital Logic Netlists Mitchell A. Thornton and Jennifer Dworak

    E-Print Network [OSTI]

    Thornton, Mitchell

    -output relation of a linear system is a mature idea and is heavily used in electrical circuit analysis that enables frequency domain analysis of digital logic circuits through the use of the Reed-Muller transform applied directly upon a logic circuit netlist. The technique is based on formulating a linear algebraic

  6. Faster processing of multiple spatially-heterodyned direct to digital holograms

    DOE Patents [OSTI]

    Hanson, Gregory R.; Bingham, Philip R.

    2006-10-03T23:59:59.000Z

    Systems and methods are described for faster processing of multiple spatially-heterodyned direct to digital holograms. A method includes of obtaining multiple spatially-heterodyned holograms, includes: digitally recording a first spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; digitally recording a second spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; Fourier analyzing the recorded first spatially-heterodyned hologram by shifting a first original origin of the recorded first spatially-heterodyned hologram including spatial heterodyne fringes in Fourier space to sit on top of a spatial-heterodyne carrier frequency defined as a first angle between a first reference beam and a first, object beam; applying a first digital filter to cut off signals around the first original origin and performing an inverse Fourier transform on the result; Fourier analyzing the recorded second spatially-heterodyned hologram by shifting a second original origin of the recorded second spatially-heterodyned hologram including spatial heterodyne fringes in Fourier space to sit on top of a spatial-heterodyne carrier frequency defined as a second angle between a second reference beam and a second object beam; and applying a second digital filter to cut off signals around the second original origin and performing an inverse Fourier transform on the result, wherein digitally recording the first spatially-heterodyned hologram is completed before digitally recording the second spatially-heterodyned hologram and a single digital image includes both the first spatially-heterodyned hologram and the second spatially-heterodyned hologram.

  7. Faster processing of multiple spatially-heterodyned direct to digital holograms

    DOE Patents [OSTI]

    Hanson, Gregory R [Clinton, TN; Bingham, Philip R [Knoxville, TN

    2008-09-09T23:59:59.000Z

    Systems and methods are described for faster processing of multiple spatially-heterodyned direct to digital holograms. A method includes of obtaining multiple spatially-heterodyned holograms, includes: digitally recording a first spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; digitally recording a second spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; Fourier analyzing the recorded first spatially-heterodyned hologram by shifting a first original origin of the recorded first spatially-heterodyned hologram including spatial heterodyne fringes in Fourier space to sit on top of a spatial-heterodyne carrier frequency defined as a first angle between a first reference beam and a first object beam; applying a first digital filter to cut off signals around the first original origin and performing an inverse Fourier transform on the result; Fourier analyzing the recorded second spatially-heterodyned hologram by shifting a second original origin of the recorded second spatially-heterodyned hologram including spatial heterodyne fringes in Fourier space to sit on top of a spatial-heterodyne carrier frequency defined as a second angle between a second reference beam and a second object beam; and applying a second digital filter to cut off signals around the second original origin and performing an inverse Fourier transform on the result, wherein digitally recording the first spatially-heterodyned hologram is completed before digitally recording the second spatially-heterodyned hologram and a single digital image includes both the first spatially-heterodyned hologram and the second spatially-heterodyned hologram.

  8. Can amphiphile architecture directly control vesicle size?

    E-Print Network [OSTI]

    M. J. Greenall; C. M. Marques

    2013-01-28T23:59:59.000Z

    Bilayer membranes self-assembled from simple amphiphiles in solution always have a planar ground-state shape. This is a consequence of several internal relaxation mechanisms of the membrane and prevents the straightforward control of vesicle size. Here, we show that this principle can be circumvented and that direct size control by molecular design is a realistic possibility. Using coarse-grained calculations, we design tetrablock copolymers that form membranes with a preferred curvature, and demonstrate how to form low-polydispersity vesicles while suppressing micellization.

  9. Applying Human Factors Evaluation and Design Guidance to a Nuclear Power Plant Digital Control System

    SciTech Connect (OSTI)

    Thomas Ulrich; Ronald Boring; William Phoenix; Emily Dehority; Tim Whiting; Jonathan Morrell; Rhett Backstrom

    2012-08-01T23:59:59.000Z

    The United States (U.S.) nuclear industry, like similar process control industries, has moved toward upgrading its control rooms. The upgraded control rooms typically feature digital control system (DCS) displays embedded in the panels. These displays gather information from the system and represent that information on a single display surface. In this manner, the DCS combines many previously separate analog indicators and controls into a single digital display, whereby the operators can toggle between multiple windows to monitor and control different aspects of the plant. The design of the DCS depends on the function of the system it monitors, but revolves around presenting the information most germane to an operator at any point in time. DCSs require a carefully designed human system interface. This report centers on redesigning existing DCS displays for an example chemical volume control system (CVCS) at a U.S. nuclear power plant. The crucial nature of the CVCS, which controls coolant levels and boration in the primary system, requires a thorough human factors evaluation of its supporting DCS. The initial digital controls being developed for the DCSs tend to directly mimic the former analog controls. There are, however, unique operator interactions with a digital vs. analog interface, and the differences have not always been carefully factored in the translation of an analog interface to a replacement DCS. To ensure safety, efficiency, and usability of the emerging DCSs, a human factors usability evaluation was conducted on a CVCS DCS currently being used and refined at an existing U.S. nuclear power plant. Subject matter experts from process control engineering, software development, and human factors evaluated the DCS displays to document potential usability issues and propose design recommendations. The evaluation yielded 167 potential usability issues with the DCS. These issues should not be considered operator performance problems but rather opportunities identified by experts to improve upon the design of the DCS. A set of nine design recommendations was developed to address these potential issues. The design principles addressed the following areas: (1) color, (2) pop-up window structure, (3) navigation, (4) alarms, (5) process control diagram, (6) gestalt grouping, (7) typography, (8) terminology, and (9) data entry. Visuals illustrating the improved DCS displays accompany the design recommendations. These nine design principles serve as the starting point to a planned general DCS style guide that can be used across the U.S. nuclear industry to aid in the future design of effective DCS interfaces.

  10. Direct Manipulation for Comprehensible, Predictable and Controllable User Interfaces

    E-Print Network [OSTI]

    Golbeck, Jennifer

    Direct Manipulation for Comprehensible, Predictable and Controllable User Interfaces Ben that are comprehensible, predictable and controllable. Direct manipulation interfaces are seen as more likely candidates Research University of Maryland, College Park, MD 20742 Abstract: Direct manipulation user interfaces have

  11. Multiprocessor position/velocity servo control for multiaxis digital robot control system

    SciTech Connect (OSTI)

    Lancraft, R.E.; Daggett, K.E.; Omaga, E.M.; Casler, R.J. Jr.; Booth, B.L.; Bergman, N.J.; Nuncy, M.D.

    1989-09-19T23:59:59.000Z

    This paper describes a digitally controlled robot. It comprises: an arm having a plurality of joints; each of the joints being axis driven by an electric motor drive; a power amplifier operable to supply drive current to each joint drive motor; respective feedback control loop means for respectively controlling the power amplifier for each of the joint drive motors; servo control means for performing control support tasks and calculation tasks; control means including a first microprocessor having a relatively high computing performance capability and a relatively low data processing interface capability; control means further including a second microprocessor having a relatively high data processing performance capability; means for interfacing the first and second microprocessors; means for generating position commands for implementation by the second microprocessor; means for detecting motor position and velocity for each drive axis and for generating corresponding digital feedback signals; means for operating the second microprocessor to control the interfacing means so as to send position commands to the first microprocessor and receive calculated torque commands from the first microprocessor; and means for operating the second microprocessor to apply the torque commands to the torque control circuitry for execution and for synchronously receiving from the motor detecting means the digital feedback position and velocity signals.

  12. Content-based fused off-axis object illumination direct-to-digital holography

    DOE Patents [OSTI]

    Price, Jeffery R.

    2006-05-02T23:59:59.000Z

    Systems and methods are described for content-based fused off-axis illumination direct-to-digital holography. A method includes calculating an illumination angle with respect to an optical axis defined by a focusing lens as a function of data representing a Fourier analyzed spatially heterodyne hologram; reflecting a reference beam from a reference mirror at a non-normal angle; reflecting an object beam from an object the object beam incident upon the object at the illumination angle; focusing the reference beam and the object beam at a focal plane of a digital recorder to from the content-based off-axis illuminated spatially heterodyne hologram including spatially heterodyne fringes for Fourier analysis; and digitally recording the content based off-axis illuminated spatially heterodyne hologram including spatially heterodyne fringes for Fourier analysis.

  13. A digital vibrating magnetic gyrometer using a control motor DSP TMS320F243

    E-Print Network [OSTI]

    Baudoin, Geneviève

    A digital vibrating magnetic gyrometer using a control motor DSP TMS320F243 G. Baudoin(1) , O processing system to control a vibrating magnetic gyrometer (VMG). This low cost angular speed sensor has to the limitations of analog systems (temperature drift, noise, bias). A digital control and signal processing system

  14. Controlling entanglement by direct quantum feedback

    E-Print Network [OSTI]

    A. R. R. Carvalho; A. J. S. Reid; J. J. Hope

    2008-07-07T23:59:59.000Z

    We discuss the generation of entanglement between electronic states of two atoms in a cavity using direct quantum feedback schemes. We compare the effects of different control Hamiltonians and detection processes in the performance of entanglement production and show that the quantum-jump-based feedback proposed by us in Phys. Rev. A {\\bf 76} 010301(R) (2007) can protect highly entangled states against decoherence. We provide analytical results that explain the robustness of jump feedback, and also analyse the perspectives of experimental implementation by scrutinising the effects of imperfections and approximations in our model.

  15. Enforcing safety policies in advanced digital reactor control systems

    SciTech Connect (OSTI)

    Wika, K.G.; Knight, J.C.

    1994-12-31T23:59:59.000Z

    Software-based digital systems in nuclear applications offer many potential benefits in the fields of safety, functionality, flexibility, and control, but they also present substantial challenges in demonstrating software reliability. In at least one nuclear system, serious concerns over the protection-system software have been raised. Achieving the required high level of software dependability through techniques such as testing, inspections, or mathematical verification is difficult because of the quantity and complexity of the software. The goal of the research described here is to facilitate dependability analysis by using a novel kernel software architecture. The kernel encapsulates into a relatively small piece of software the implementation of a set of critical safety policies so that policy enforcement is isolated from the rest of the system. Provided the kernel operates correctly, safety policy compliance is assured irrespective of the actions of the majority of the software.

  16. Directed Control of Discrete Event Systems: Optimization Based Approach

    E-Print Network [OSTI]

    Kumar, Ratnesh

    Directed Control of Discrete Event Systems: Optimization Based Approach J. Huang and R. Kumar an optimal director. Keywords: Discrete event systems, optimal control, supervisory control, directed control sense for plants that are executor of controllable events. In this paper we develop an optimization

  17. Direct Manipulation for Comprehensible, Predictable and Controllable User Interfaces

    E-Print Network [OSTI]

    Shneiderman, Ben

    Direct Manipulation for Comprehensible, Predictable and Controllable User Interfaces Ben Direct manipulation user interfaces have proven their worth over two decades, but they are still in their youth. Dramatic opportunities exist to develop direct manipulation pro- gramming to create end

  18. Grid artifact reduction for direct digital radiography detectors based on rotated stationary grids with homomorphic filtering

    SciTech Connect (OSTI)

    Kim, Dong Sik [Department of Electronics Engineering, Hankuk University of Foreign Studies, Gyeonggi-do 449-791 (Korea, Republic of); Lee, Sanggyun [R and D Center, DRTECH Co., Gyeonggi-do 463-782 (Korea, Republic of)

    2013-06-15T23:59:59.000Z

    Purpose: Grid artifacts are caused when using the antiscatter grid in obtaining digital x-ray images. In this paper, research on grid artifact reduction techniques is conducted especially for the direct detectors, which are based on amorphous selenium. Methods: In order to analyze and reduce the grid artifacts, the authors consider a multiplicative grid image model and propose a homomorphic filtering technique. For minimal damage due to filters, which are used to suppress the grid artifacts, rotated grids with respect to the sampling direction are employed, and min-max optimization problems for searching optimal grid frequencies and angles for given sampling frequencies are established. The authors then propose algorithms for the grid artifact reduction based on the band-stop filters as well as low-pass filters. Results: The proposed algorithms are experimentally tested for digital x-ray images, which are obtained from direct detectors with the rotated grids, and are compared with other algorithms. It is shown that the proposed algorithms can successfully reduce the grid artifacts for direct detectors. Conclusions: By employing the homomorphic filtering technique, the authors can considerably suppress the strong grid artifacts with relatively narrow-bandwidth filters compared to the normal filtering case. Using rotated grids also significantly reduces the ringing artifact. Furthermore, for specific grid frequencies and angles, the authors can use simple homomorphic low-pass filters in the spatial domain, and thus alleviate the grid artifacts with very low implementation complexity.

  19. A firmware-defined digital direct-sampling NMR spectrometer for condensed matter physics

    SciTech Connect (OSTI)

    Pikulski, M., E-mail: marekp@ethz.ch; Shiroka, T.; Ott, H.-R.; Mesot, J. [Laboratorium für Festkörperphysik, ETH Hönggerberg, CH-8093 Zürich, Switzerland and Paul Scherrer Institut, CH-5232 Villigen PSI (Switzerland)

    2014-09-15T23:59:59.000Z

    We report on the design and implementation of a new digital, broad-band nuclear magnetic resonance (NMR) spectrometer suitable for probing condensed matter. The spectrometer uses direct sampling in both transmission and reception. It relies on a single, commercially-available signal processing device with a user-accessible field-programmable gate array (FPGA). Its functions are defined exclusively by the FPGA firmware and the application software. Besides allowing for fast replication, flexibility, and extensibility, our software-based solution preserves the option to reuse the components for other projects. The device operates up to 400?MHz without, and up to 800?MHz with undersampling, respectively. Digital down-conversion with ±10?MHz passband is provided on the receiver side. The system supports high repetition rates and has virtually no intrinsic dead time. We describe briefly how the spectrometer integrates into the experimental setup and present test data which demonstrates that its performance is competitive with that of conventional designs.

  20. A 6-GHz Low-Power BiCMOS SiGe:C 0.25 m Direct Digital Synthesizer

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 A 6-GHz Low-Power BiCMOS SiGe:C 0.25 µm Direct Digital Synthesizer St´ephane Thuries, ´Eric SiGe direct digital synthesizer (DDS) is reported. This paper discusses the BiCMOS design differential pair. The circuit has been processed in a BiCMOS SiGe:C 0.25 µm technology. The power consumption

  1. Acquisition and replay systems for direct-to-digital holography and holovision

    DOE Patents [OSTI]

    Thomas, Clarence E. (Knoxville, TN); Hanson, Gregory R. (Clinton, TN)

    2003-02-25T23:59:59.000Z

    Improvements to the acquisition and replay systems for direct-to-digital holography and holovision are described. A method of recording an off-axis hologram includes: splitting a laser beam into an object beam and a reference beam; reflecting the reference beam from a reference beam mirror; reflecting the object beam from an illumination beamsplitter; passing the object beam through an objective lens; reflecting the object beam from an object; focusing the reference beam and the object beam at a focal plane of a digital recorder to form an off-axis hologram; digitally recording the off-axis hologram; and transforming the off-axis hologram in accordance with a Fourier transform to obtain a set of results. A method of writing an off-axis hologram includes: passing a laser beam through a spatial light modulator; and focusing the laser beam at a focal plane of a photorefractive crystal to impose a holographic diffraction grating pattern on the photorefractive crystal. A method of replaying an off-axis hologram includes: illuminating a photorefractive crystal having a holographic diffraction grating with a replay beam.

  2. Digital making : exploring design with computer controlled fabrication

    E-Print Network [OSTI]

    Kashyap, Sameer, 1978-

    2004-01-01T23:59:59.000Z

    This thesis examines the underlying issues innate to the design process of developing architectural solutions using the digital for "making" architecture, focusing on architectural production. It proposes an alternative ...

  3. Fused off-axis object illumination direct-to-digital holography with a plurality of illumination sources

    DOE Patents [OSTI]

    Price, Jeffery R.; Bingham, Philip R.

    2005-11-08T23:59:59.000Z

    Systems and methods are described for rapid acquisition of fused off-axis illumination direct-to-digital holography. A method of recording a plurality of off-axis object illuminated spatially heterodyne holograms, each of the off-axis object illuminated spatially heterodyne holograms including spatially heterodyne fringes for Fourier analysis, includes digitally recording, with a first illumination source of an interferometer, a first off-axis object illuminated spatially heterodyne hologram including spatially heterodyne fringes for Fourier analysis; and digitally recording, with a second illumination source of the interferometer, a second off-axis object illuminated spatially heterodyne hologram including spatially heterodyne fringes for Fourier analysis.

  4. Polarimetric glucose sensing utilizing a digital closed-loop control system 

    E-Print Network [OSTI]

    Cameron, Brent Duane

    1996-01-01T23:59:59.000Z

    POLARIMETRIC GLUCOSE SENSING UTILIZING A DIGITAL CLOSED-LOOP CONTROL SYSTEM A Thesis by BRENT DUANE CAMERON Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE August 1996 Major Subject: Bioengineering POLARIMETRIC GLUCOSE SENSING UTILIZING A DIGITAL CLOSED-LOOP CONTROL SYSTEM A Thesis by BRENT DUANE CAMERON Submitted to Texas Atr M University in partial fulfillment of the requirements...

  5. Accurate Detection of Out-of-Control Variations From Digital Camera Devices

    E-Print Network [OSTI]

    Doran, Simon J.

    -- In this paper, we propose the novel use of Statistical Process Control (SPC) as a tool for identifying anomalies in the image acquisition process of a digital camera, for the purpose of camera identification. Control charts and Exponentially Weighted Moving Average (EWMA) control charts are used to highlight the variation for a subset

  6. A digital control system for external magnetohydrodynamic modes in tokamak plasmas

    SciTech Connect (OSTI)

    Hanson, J. M.; Klein, A. J.; Mauel, M. E.; Maurer, D. A.; Navratil, G. A.; Pedersen, T. Sunn [Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027 (United States)

    2009-04-15T23:59:59.000Z

    A feedback system for controlling external, long-wavelength magnetohydrodynamic activity is described. The system is comprised of a network of localized magnetic pickup and control coils driven by four independent, low-latency field-programable gate array controllers. The control algorithm incorporates digital spatial filtering to resolve low mode number activity, temporal filtering to correct for frequency-dependent amplitude and phase transfer effects in the control hardware, and a Kalman filter to distinguish the unstable plasma mode from noise.

  7. Project Controls - DOE Directives, Delegations, and Requirements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    description of project controls and the role the cost estimation package plays. g4301-1chp14.pdf -- PDF Document, 6 KB Writer: John Makepeace Subjects: Administration Management...

  8. United States Nuclear Command and Control System Support Staff. Directive

    SciTech Connect (OSTI)

    Kennedy, R.

    1988-02-03T23:59:59.000Z

    The Directive establishes, pursuant to National Security Decision Directive, August 21, 1987, and the authority vested in the Secretary of Defense, the U.S. Nuclear Command and Control System Support Staff under the direction, authority, and control of the Secretary of Defense, who also serves as the Executive Agent for the Nuclear Command and Control System (NCCS) (hereafter referred to as Executive Agent). The Directive establishes the DoD NCCS Executive Review Committee (ERC) in support of the Secretary of Defense. It assigns the responsibilities, functions, relationships and authorities of the U.S. NCCS Support Staff (NSS) and its Director, and those of the ERC.

  9. MIT Department of Nuclear Engineering 1 Digital Instrumentation and Control

    E-Print Network [OSTI]

    Schweik, Charles M.

    . · There are no methods for evaluating and accepting commercial off-the-shelf digital I&C systems. [National Research) · A system to provide abundant emergency core cooling shall be provided. The system safety function shall of I&C Systems · Reactor Trip I&C Systems initiate rapid neutron poison insertion to shut down

  10. New Directions in Measurement for Software Quality Control

    E-Print Network [OSTI]

    Suryn, Witold

    of statistical data. In total this provides a framework for quality control in software engineering that is freed1 New Directions in Measurement for Software Quality Control Paul Krause, Bernd Freimut and Witold Suryn Abstract--Assessing and controlling software quality is still an immature discipline. One

  11. Image Forensics of Digital Cameras by Analysing Image Variations using Statistical Process Control

    E-Print Network [OSTI]

    Doran, Simon J.

    the novel use of Statistical Process Control (SPC) as a tool for identifying anomalies in digital cameras, by analysing image variations. We apply SPC on six low-end cameras, and one mid-range camera. By plotting the mean distribution of image pixel data through control charts, we have been able to identify a clear

  12. The trend of digital control system design for nuclear power plants in Korea

    SciTech Connect (OSTI)

    Park, S. H.; Jung, H. Y.; Yang, C. Y.; Choe, I. N. [Korea Power Engineering Company, 360-9 Mabuk-Dong, Yongin-Si, Gyeonggi-Do, 446-713 (Korea, Republic of)

    2006-07-01T23:59:59.000Z

    Currently there are 20 nuclear power plants (NPPs) in operation, and 6 more units are under construction in Korea. The control systems of those NPPs have also been developed together with the technology advancement. Control systems started with On-Off control using the relay logic, had been evolved into Solid-State logic using TTL ICs, and applied with the micro-processors since the Yonggwang NPP Units 3 and 4 which started its construction in 1989. Multiplexers are also installed at the local plant areas to collect field input and to send output signals while communicating with the controllers located in the system cabinets near the main control room in order to reduce the field wiring cables. The design of the digital control system technology for the NPPs in Korea has been optimized to maximize the operability as well as the safety through the design, construction, start-up and operation experiences. Both Shin-Kori Units 1 and 2 and Shin-Wolsong Units 1 and 2 NPP projects under construction are being progressed at the same time. Digital Plant Control Systems of these projects have adopted multi-loop controllers, redundant loop configuration, and soft control system for the radwaste system. Programmable Logic Controller (PLC) and Distributed Control System (DCS) are applied with soft control system in Shin-Kori Units 3 and 4. This paper describes the evolvement of control system at the NPPs in Korea and the experience and design improvement through the observation of the latest failure of the digital control system. In addition, design concept and its trend of the digital control system being applied to the NPP in Korea are introduced. (authors)

  13. Performance analysis of an off-line BMI for the control of a robotic digit Ouanezar S., (1,2)

    E-Print Network [OSTI]

    Boyer, Edmond

    have so far been applied to robot artifacts. Many studies on the cortical activity of the motor cortex an experimental site (robotic digit) and implemented a kinematic control of its movement (i.e. positional controlPerformance analysis of an off-line BMI for the control of a robotic digit (1,3) Ouanezar S., (1

  14. Digital Mapping Of Structurally Controlled Geothermal Features With GPS

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOE Facility DatabaseMichigan:Dewey-Humboldt,DickensonDiengDigital Lumens

  15. BacNet and Analog/Digital Interfaces of the Building Controls Virtual Testbed

    SciTech Connect (OSTI)

    Nouidui, Thierry Stephane; Wetter, Michael; Li, Zhengwei; Pang, Xiufeng; Bhattachayra, Prajesh; Haves, Philip

    2011-11-01T23:59:59.000Z

    This paper gives an overview of recent developments in the Building Controls Virtual Test Bed (BCVTB), a framework for co-simulation and hardware-in-the- loop. First, a general overview of the BCVTB is presented. Second, we describe the BACnet interface, a link which has been implemented to couple BACnet devices to the BCVTB. We present a case study where the interface was used to couple a whole building simulation program to a building control system to assess in real-time the performance of a real building. Third, we present the ADInterfaceMCC, an analog/digital interface that allows a USB-based analog/digital converter to be linked to the BCVTB. In a case study, we show how the link was used to couple the analog/digital converter to a building simulation model for local loop control.

  16. Apparatus for externally controlled closed-loop feedback digital epitaxy

    DOE Patents [OSTI]

    Eres, Djula (Knoxville, TN); Sharp, Jeffrey W. (Knoxville, TN)

    1996-01-01T23:59:59.000Z

    A method and apparatus for digital epitaxy. The apparatus includes a pulsed gas delivery assembly that supplies gaseous material to a substrate to form an adsorption layer of the gaseous material on the substrate. Structure is provided for measuring the isothermal desorption spectrum of the growth surface to monitor the active sites which are available for adsorption. The vacuum chamber housing the substrate facilitates evacuation of the gaseous material from the area adjacent the substrate following exposure. In use, digital epitaxy is achieved by exposing a substrate to a pulse of gaseous material to form an adsorption layer of the material on the substrate. The active sites on the substrate are monitored during the formation of the adsorption layer to determine if all the active sites have been filled. Once the active sites have been filled on the growth surface of the substrate, the pulse of gaseous material is terminated. The unreacted portion of the gas pulse is evacuated by continuous pumping. Subsequently, a second pulse is applied when availability of active sites is determined by studying the isothermal desorption spectrum. These steps are repeated until a thin film of sufficient thickness is produced.

  17. Apparatus for externally controlled closed-loop feedback digital epitaxy

    DOE Patents [OSTI]

    Eres, D.; Sharp, J.W.

    1996-07-30T23:59:59.000Z

    A method and apparatus for digital epitaxy are disclosed. The apparatus includes a pulsed gas delivery assembly that supplies gaseous material to a substrate to form an adsorption layer of the gaseous material on the substrate. Structure is provided for measuring the isothermal desorption spectrum of the growth surface to monitor the active sites which are available for adsorption. The vacuum chamber housing the substrate facilitates evacuation of the gaseous material from the area adjacent the substrate following exposure. In use, digital epitaxy is achieved by exposing a substrate to a pulse of gaseous material to form an adsorption layer of the material on the substrate. The active sites on the substrate are monitored during the formation of the adsorption layer to determine if all the active sites have been filled. Once the active sites have been filled on the growth surface of the substrate, the pulse of gaseous material is terminated. The unreacted portion of the gas pulse is evacuated by continuous pumping. Subsequently, a second pulse is applied when availability of active sites is determined by studying the isothermal desorption spectrum. These steps are repeated until a thin film of sufficient thickness is produced. 5 figs.

  18. Direct-to-digital holography reduction of reference hologram noise and fourier space smearing

    DOE Patents [OSTI]

    Voelkl, Edgar

    2006-06-27T23:59:59.000Z

    Systems and methods are described for reduction of reference hologram noise and reduction of Fourier space smearing, especially in the context of direct-to-digital holography (off-axis interferometry). A method of reducing reference hologram noise includes: recording a plurality of reference holograms; processing the plurality of reference holograms into a corresponding plurality of reference image waves; and transforming the corresponding plurality of reference image waves into a reduced noise reference image wave. A method of reducing smearing in Fourier space includes: recording a plurality of reference holograms; processing the plurality of reference holograms into a corresponding plurality of reference complex image waves; transforming the corresponding plurality of reference image waves into a reduced noise reference complex image wave; recording a hologram of an object; processing the hologram of the object into an object complex image wave; and dividing the complex image wave of the object by the reduced noise reference complex image wave to obtain a reduced smearing object complex image wave.

  19. 1428 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 23, NO. 3, MAY 2008 Digital Average Current-Mode Controller for DCDC

    E-Print Network [OSTI]

    controls the output power, while an internal (fast) loop controls the current. This paper introduces a digital average current mode controller for dc power supplies in PVD applica- tions. The controller control loop enable opera- tion over wide ranges of output power and voltage. The proposed control

  20. TESLA-FEL Report 2005-06 DIGITAL LOW LEVEL RF CONTROL SYSTEM FOR THE DESY TTF

    E-Print Network [OSTI]

    TESLA-FEL Report 2005-06 DIGITAL LOW LEVEL RF CONTROL SYSTEM FOR THE DESY TTF VUV-FEL LINAC Valeri Electron Laser (VUV-FEL) Linac each klystron supplies RF power to up to 32 cavities. The superconducting. The VUV-FEL Linac RF control system employs a completely digital feedback system to provide flexibility

  1. International Conference on Machine Control & Guidance 2008 1 Generation and Analysis of Digital Terrain Models with

    E-Print Network [OSTI]

    1st International Conference on Machine Control & Guidance 2008 1 Generation and Analysis of Digital Terrain Models with Parallel Guidance Systems for Precision Agriculture Görres GRENZDÖRFFER models at no or little additional cost. In the paper the achievable data accuracy under different

  2. Digitally Controlled Distributed Multiphase DC-DC Converters Xu Zhang, Luca Corradini and Dragan Maksimovic

    E-Print Network [OSTI]

    Digitally Controlled Distributed Multiphase DC-DC Converters Xu Zhang, Luca Corradini and Dragan, corradin, maksimov}@colorado.edu Abstract -- This paper describes a distributed master-slave multiphase DC V-to-12 V input, 1.3 V, 20 A output two-phase synchronous buck converter. Index Terms-- Multiphase

  3. Input Power Measurement Techniques for Single-Phase Digitally Controlled PFC Rectifiers

    E-Print Network [OSTI]

    resulting in accurate input power measurements are outlined. 1. INTRODUCTION Time-of-use marketing are required for both "time-of-use" billing and system power management purposes. When a digitally controlled. Experimental results comparing and contrasting the perfor- mance of the power measurement architectures

  4. Design of optimal digital controller for stable super-high-speed permanent-magnet synchronous

    E-Print Network [OSTI]

    Wu, Thomas

    collaborative design scheme of a super-high-speed permanent-magnet synchronous motor (PMSM) and its digital stability and performance. Since the systematic design of the PMSM can ensure its stability over the full the efficiency and performance of the PMSM. The unique feature in the proposed optimal V/f control is its design

  5. Digital Control of a Six-Axis Manipulator

    E-Print Network [OSTI]

    Blanchard, David C.

    This paper describes a scheme for providing low-level control of a multi-link serial manipulator. The goal was to achieve adaptive behavior without making assumptions about the environment.

  6. Choosing a sample rate for prime mover digital control systems

    SciTech Connect (OSTI)

    Schade, J.

    1995-09-01T23:59:59.000Z

    This paper explains the reasons and consequences of sample rate selection for gas turbine and steam turbine controls. Sample rate theory is important because there is often confusion about how to select the sample rate for different applications. Full-load rejection offspeeds, a common prime mover performance issue, will be used as an example. The effect of different sample rates will be shown.

  7. Digital Mapping Of Structurally Controlled Geothermal Features With Gps

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualPropertyd8c-a9ae-f8521cbb8489 No revision hasda62829c05bGabbs TypeWinds Wind

  8. Electrically controlling the polarizing direction of a graphene polarizer

    SciTech Connect (OSTI)

    Zhu, Z. H., E-mail: zzhwcx@163.com; Qin, S. Q. [College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China); State Key Laboratory of High Performance Computing, National University of Defense Technology, Changsha 410073 (China); Guo, C. C.; Liu, K.; Zhang, J. F.; Ye, W. M.; Yuan, X. D. [College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

    2014-09-14T23:59:59.000Z

    We theoretically demonstrate a polarizer with an electrically controllable polarizing direction in the far infrared range using two orthogonal periodic arrays of graphene ribbons, which have different widths and are supported on a dielectric film placed on a thick piece of metal. The operation mechanism originates from the polarization-dependent resonant absorption of the two orthogonal graphene ribbons, which can be respectively controlled with different external bias voltages. The operation wavelength can be expanded to terahertz (THz) radiation.

  9. Direct laser additive fabrication system with image feedback control

    DOE Patents [OSTI]

    Griffith, Michelle L. (Albuquerque, NM); Hofmeister, William H. (Nashville, TN); Knorovsky, Gerald A. (Albuquerque, NM); MacCallum, Danny O. (Edgewood, NM); Schlienger, M. Eric (Albuquerque, NM); Smugeresky, John E. (Pleasanton, CA)

    2002-01-01T23:59:59.000Z

    A closed-loop, feedback-controlled direct laser fabrication system is disclosed. The feedback refers to the actual growth conditions obtained by real-time analysis of thermal radiation images. The resulting system can fabricate components with severalfold improvement in dimensional tolerances and surface finish.

  10. A Sensorless Direct Torque Control Scheme Suitable for Electric Vehicles

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A Sensorless Direct Torque Control Scheme Suitable for Electric Vehicles Farid Khoucha, Khoudir an Electric Vehicle (EV). The proposed scheme uses an adaptive flux and speed observer that is based on a full is a good candidate for EVs propulsion. Index Terms--Electric vehicle, Induction motor, sensorless drive

  11. Control of Jets in Crossflow using Direct Numerical Simulations

    E-Print Network [OSTI]

    Mahesh, Krishnan

    Control of Jets in Crossflow using Direct Numerical Simulations A THESIS SUBMITTED TO THE FACULTY in crossflow by axial pulsing. Our main idea is that pulsing generates vortex rings; the effect of pulsing on jets in crossflow can therefore be explained by studying the behavior of vortex rings in crossflow

  12. Chem. Eng. 4E03/6E03 Page 1 CHEM. ENGINEERING 4E03/6E03: DIGITAL COMPUTER PROCESS CONTROL

    E-Print Network [OSTI]

    Thompson, Michael

    Chem. Eng. 4E03/6E03 Page 1 CHEM. ENGINEERING 4E03/6E03: DIGITAL COMPUTER PROCESS CONTROL COURSE: Digital Computer Process Control. Dynamic Models, Analysis Tools and Control Algorithms. Available-based), suitable for implementation on digital computers. Material covered will include continuous- and discrete

  13. 1120 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 25, NO. 5, MAY 2010 Digital Sliding-Mode Controller For High-Frequency DC/DC SMPS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -frequency switching-mode power supply (SMPS), sliding-mode (SM) control. I. INTRODUCTION DIGITAL control technique has-performance control algorithms. Most existing digital controller for high-frequency (in mega- hertz range) and low-power limitations to control low-power high-frequency SMPS. Analog controllers are sensitive to analog component

  14. Intermediate frequency band digitized high dynamic range radiometer system for plasma diagnostics and real-time Tokamak control

    SciTech Connect (OSTI)

    Bongers, W. A.; Beveren, V. van; Westerhof, E.; Goede, A. P. H.; Krijger, B.; Berg, M. A. van den; Graswinckel, M. F.; Schueller, F. C. [FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, PO Box 1207, 3430 BE Nieuwegein (Netherlands); Thoen, D. J. [Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft (Netherlands); Nuij, P. J. W. M. [Eindhoven University of Technology, Control Systems Technology Group, and Applied Physics Department, PO Box 513, NL-5600 MB Eindhoven (Netherlands); Baar, M. R. de; Donne, A. J. H.; Hennen, B. A. [FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, PO Box 1207, 3430 BE Nieuwegein (Netherlands); Eindhoven University of Technology, Control Systems Technology Group, and Applied Physics Department, PO Box 513, NL-5600 MB Eindhoven (Netherlands); Kantor, M. [FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, PO Box 1207, 3430 BE Nieuwegein (Netherlands); Forschungszentrum Juelich GMBH, Institute of Energy and Climate research, Plasma Physics, Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Juelich (Germany); Ioffe Institute, RAS, Saint-Petersburg, 195256 (Russian Federation)

    2011-06-15T23:59:59.000Z

    An intermediate frequency (IF) band digitizing radiometer system in the 100-200 GHz frequency range has been developed for Tokamak diagnostics and control, and other fields of research which require a high flexibility in frequency resolution combined with a large bandwidth and the retrieval of the full wave information of the mm-wave signals under investigation. The system is based on directly digitizing the IF band after down conversion. The enabling technology consists of a fast multi-giga sample analog to digital converter that has recently become available. Field programmable gate arrays (FPGA) are implemented to accomplish versatile real-time data analysis. A prototype system has been developed and tested and its performance has been compared with conventional electron cyclotron emission (ECE) spectrometer systems. On the TEXTOR Tokamak a proof of principle shows that ECE, together with high power injected and scattered radiation, becomes amenable to measurement by this device. In particular, its capability to measure the phase of coherent signals in the spectrum offers important advantages in diagnostics and control. One case developed in detail employs the FPGA in real-time fast Fourier transform (FFT) and additional signal processing. The major benefit of such a FFT-based system is the real-time trade-off that can be made between frequency and time resolution. For ECE diagnostics this corresponds to a flexible spatial resolution in the plasma, with potential application in smart sensing of plasma instabilities such as the neoclassical tearing mode (NTM) and sawtooth instabilities. The flexible resolution would allow for the measurement of the full mode content of plasma instabilities contained within the system bandwidth.

  15. Digital control systems in nuclear power plants: Failure information, modeling concepts, and applications. Revision 1

    SciTech Connect (OSTI)

    Galyean, W.J.

    1993-06-23T23:59:59.000Z

    This report briefly describes some current applications of advanced computerized digital display and control systems at US commercial nuclear power plants and presents the results of a literature search that was made to gather information on the reliability of these systems. Both hardware and software reliability were addressed in this review. Only limited failure rate information was found, with the chemical process industry being the primary source of information on hardware failure rates and expert opinion the primary source for software failure rates. Safety-grade digital control systems are typically installed on a functional like-for-like basis, replacing older analog systems without substantially changing interactions with other plant systems. Future work includes performing a limited probabilistic risk assessment of a representative DCS to assess its risk significance.

  16. Digital control systems in nuclear power plants: Failure information, modeling concepts, and applications

    SciTech Connect (OSTI)

    Galyean, W.J.

    1993-06-23T23:59:59.000Z

    This report briefly describes some current applications of advanced computerized digital display and control systems at US commercial nuclear power plants and presents the results of a literature search that was made to gather information on the reliability of these systems. Both hardware and software reliability were addressed in this review. Only limited failure rate information was found, with the chemical process industry being the primary source of information on hardware failure rates and expert opinion the primary source for software failure rates. Safety-grade digital control systems are typically installed on a functional like-for-like basis, replacing older analog systems without substantially changing interactions with other plant systems. Future work includes performing a limited probabilistic risk assessment of a representative DCS to assess its risk significance.

  17. Method and apparatus for digitally based high speed x-ray spectrometer for direct coupled use with continuous discharge preamplifiers

    DOE Patents [OSTI]

    Warburton, William K. (1300 Mills St., Menlo Park, CA 94025)

    1998-01-01T23:59:59.000Z

    A high speed, digitally based, signal processing system which accepts directly coupled input data from a detector with a continuous discharge type preamplifier and produces a spectral analysis of the x-rays illuminating the detector. The system's principal elements are an analog signal conditioning section, a combinatorial logic section which implements digital triangular filtering and pileup inspection, and a microprocessor which accepts values captured by the logic section and uses them to compute x-ray energy values. Operating without pole-zero correction, the system achieves high resolution by capturing, in conjunction with each peak value from the digital filter, an associated value of the unfiltered signal, and using this latter signal to correct the former for errors which arise from its local slope terms. This correction greatly reduces both energy resolution degradation and peak centroid shifting in the output spectrum as a function of input count rate. When the noise of this correction is excessive, a modification allows two filtered averages of the signal to be captured and a corrected peak amplitude computed therefrom.

  18. Method and apparatus for digitally based high speed x-ray spectrometer for direct coupled use with continuous discharge preamplifiers

    DOE Patents [OSTI]

    Warburton, W.K.

    1998-06-30T23:59:59.000Z

    A high speed, digitally based, signal processing system is disclosed which accepts directly coupled input data from a detector with a continuous discharge type preamplifier and produces a spectral analysis of the x-rays illuminating the detector. The system`s principal elements are an analog signal conditioning section, a combinatorial logic section which implements digital triangular filtering and pileup inspection, and a microprocessor which accepts values captured by the logic section and uses them to compute x-ray energy values. Operating without pole-zero correction, the system achieves high resolution by capturing, in conjunction with each peak value from the digital filter, an associated value of the unfiltered signal, and using this latter signal to correct the former for errors which arise from its local slope terms. This correction greatly reduces both energy resolution degradation and peak centroid shifting in the output spectrum as a function of input count rate. When the noise of this correction is excessive, a modification allows two filtered averages of the signal to be captured and a corrected peak amplitude computed therefrom. 14 figs.

  19. Residential Air Conditioner Direct Load Control "Energy Partners Program"

    E-Print Network [OSTI]

    Cook, J. D.

    1994-01-01T23:59:59.000Z

    RESIDENTIAL AIR CONDITIONER DIRECT LOAD CONTROL "ENERGY PARTNERS PROGRAMn John D. Cook Supervisor Houston ABSTRACT Demand side management programs like Energy Partners can provide an effective peak reducing capability which within a.... In this partnership the customer allows HLfP to install a I switch on his/her air conditioner or heat pump and i periodically cycle the unit off during the hottest summer 1 days. In return the customer benefits by receiving an incentive payment, as well...

  20. 164 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 21, NO. 1, JANUARY 2006 A Digitally Controlled DC/DC Converter

    E-Print Network [OSTI]

    Popovic, Zoya

    164 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 21, NO. 1, JANUARY 2006 A Digitally Controlled DC of power, dynamic control of the drain supply voltage has been proposed [1]­[6]. The technique of adjusting-loop implementation of the RFPA power control through the drain supply voltage. The ob- jectives are to improve

  1. 2004 35thAnnual IEEE Power Electronics SpecialistsConference Aachen, Germany. 2004 Digital Controller Design for Electronic Ballasts with Phase Control

    E-Print Network [OSTI]

    Controller Design for Electronic Ballasts with Phase Control Yan Yin and Regan Zane Colorado Power tolerances, variations in environmental conditions, and variable power control. Common approaches2004 35thAnnual IEEE Power Electronics SpecialistsConference Aachen, Germany. 2004 Digital

  2. Development of a digital control unit to displace diesel fuel with natural gas

    SciTech Connect (OSTI)

    Talbott, A.D. [AlliedSignal FM& T, Kansas City, MO (United States)]|[Full Circle Engineering, Northglenn, CO (United States)

    1997-03-01T23:59:59.000Z

    Full Circle Engineering (FCE), supported by the Colorado School of Mines (CSM), proposed a Small Business CRADA with Allied Signal Federal Manufacturing & Technologies/Kansas City (FM&T/KC) for the development of a fumigation digital control unit (DCU) that would allow the displacement of diesel fuel with natural gas. Nationwide, diesel trucks and buses consumed over 21 billion gallons of fuel in 1992. The development of systems that allow the use of alternative fuels, natural gas in particular, for transportation would significantly reduce emissions and pollutants. It would also help implement DOE`s mandate for energy security (use of domestic fuels) required by the Energy Policy Act (EPACT).

  3. Direct versus Facility Centric Load Control for Automated Demand Response

    SciTech Connect (OSTI)

    Koch, Ed; Piette, Mary Ann

    2009-11-06T23:59:59.000Z

    Direct load control (DLC) refers to the scenario where third party entities outside the home or facility are responsible for deciding how and when specific customer loads will be controlled in response to Demand Response (DR) events on the electric grid. Examples of third parties responsible for performing DLC may be Utilities, Independent System Operators (ISO), Aggregators, or third party control companies. DLC can be contrasted with facility centric load control (FCLC) where the decisions for how loads are controlled are made entirely within the facility or enterprise control systems. In FCLC the facility owner has more freedom of choice in how to respond to DR events on the grid. Both approaches are in use today in automation of DR and both will continue to be used in future market segments including industrial, commercial and residential facilities. This paper will present a framework which can be used to differentiate between DLC and FCLC based upon where decisions are made on how specific loads are controlled in response to DR events. This differentiation is then used to compare and contrast the differences between DLC and FCLC to identify the impact each has on:(1)Utility/ISO and third party systems for managing demand response, (2)Facility systems for implementing load control, (3)Communications networks for interacting with the facility and (4)Facility operators and managers. Finally a survey of some of the existing DR related specifications and communications standards is given and their applicability to DLC or FCLC. In general FCLC adds more cost and responsibilities to the facilities whereas DLC represents higher costs and complexity for the Utility/ISO. This difference is primarily due to where the DR Logic is implemented and the consequences that creates. DLC may be more certain than FCLC because it is more predictable - however as more loads have the capability to respond to DR signals, people may prefer to have their own control of end-use loads and FCLC systems. Research is needed to understand the predictability of FCLC which is related to the perceived value of the DR from the facility manager or home owner's perspective.

  4. Abstract--System modeling and digital control in a modular masterless multiphase architecture are presented in this paper.

    E-Print Network [OSTI]

    Abstract-- System modeling and digital control in a modular masterless multiphase architecture of large load transients. Interleaved multi-phase converters are frequently used in such systems due response and small output capacitance. In general, multi-phase converters require control approaches

  5. Action-centered display design: Observations and conclusions to HMI by applying digital I and C in main control rooms

    SciTech Connect (OSTI)

    Treier, C.; Zeck, K.; Weich, A.; Schildheuer, R. [Tuev Sued Energietechnik GmbH Baden-Wuerttemberg, Gottlieb-Daimler-Strasse 7, D-70794 (Germany)

    2006-07-01T23:59:59.000Z

    With the increasing use of digital I and C systems, the shift personnel in a Nuclear Power Plant (NPP) has the chance to dispose of new supporting methods that influence their actions directly or indirectly. Besides the automation of monitoring and control functions, the task- and problem-oriented increased number of (current state) information in screen based displays is to be mentioned. A few released screen based displays of a German NPP illustrate the influence on the course of action. Therefore the design of displays won't only be determined by the operating mode in future but displays themselves are influencing the operating mode offering both very compact and dynamic information that can directly be used in the operating mode. In order to be able to take these future key functions adequately and early into consideration when designing screen based displays, the development of design instruments like Style Guides with Good Practice methods and construction catalogues both on a company and on an company spanning level is essential: a challenging task for economy and science and also for standardization committees that shall be illustrated in the following report. (authors)

  6. Future directions for arms control and nonproliferation. Conference summary

    SciTech Connect (OSTI)

    Not Available

    1994-07-06T23:59:59.000Z

    This report provides a summary of the presentations and discussions at the Spring 1994 CNSN-Wilton Park Conference. The Conference was one of a series on US-European security cooperation organized by The Center for National Security Negotiations (CNSN) of Science Applications International Corporation. These conferences bring together government and non-government experts, primarily from the United States and Europe, to discuss a range of regional and global security issues. The conferences provide an opportunity to explore, in a frank and off-the-record environment, common interests and concerns, as well as differences in approach that affect trans-Atlantic cooperation. This report is divided into the following three areas: (1) implementation of existing and pending agreements; (2) non-proliferation: prospects for trans-Atlantic cooperation; and (3) future directions in arms control.

  7. The Effect of Degraded Digital Instrumentation and Control systems on Human-system Interfaces and Operator Performance

    SciTech Connect (OSTI)

    OHara, J.M.; Gunther, B.; Martinez-Guridi, G. (BNL); Xing, J.; Barnes, V. (NRC)

    2010-11-07T23:59:59.000Z

    Integrated digital instrumentation and control (I&C) systems in new and advanced nuclear power plants (NPPs) will support operators in monitoring and controlling the plants. Even though digital systems typically are expected to be reliable, their potential for degradation or failure significantly could affect the operators performance and, consequently, jeopardize plant safety. This U.S. Nuclear Regulatory Commission (NRC) research investigated the effects of degraded I&C systems on human performance and on plant operations. The objective was to develop technical basis and guidance for human factors engineering (HFE) reviews addressing the operator's ability to detect and manage degraded digital I&C conditions. We reviewed pertinent standards and guidelines, empirical studies, and plant operating experience. In addition, we evaluated the potential effects of selected failure modes of the digital feedwater control system of a currently operating pressurized water reactor (PWR) on human-system interfaces (HSIs) and the operators performance. Our findings indicated that I&C degradations are prevalent in plants employing digital systems, and the overall effects on the plant's behavior can be significant, such as causing a reactor trip or equipment to operate unexpectedly. I&C degradations may affect the HSIs used by operators to monitor and control the plant. For example, deterioration of the sensors can complicate the operators interpretation of displays, and sometimes may mislead them by making it appear that a process disturbance has occurred. We used the findings as the technical basis upon which to develop HFE review guidance.

  8. From Basic Control to Optimized Systems-Applying Digital Control Systems to Steam Boilers 

    E-Print Network [OSTI]

    Hockenbury, W. D.

    1982-01-01T23:59:59.000Z

    on heat transferred to a process. If that process suffers an upset, unstable conditions can propagate from one process to another via the steam supply system. The closer the tolerance in the boiler control system, the smaller the steam header...

  9. A Markov Model for Assessing the Reliability of a Digital Feedwater Control System

    SciTech Connect (OSTI)

    Chu,T.L.; Yue, M.; Martinez-Guridi, G.; Lehner, J.

    2009-02-11T23:59:59.000Z

    A Markov approach has been selected to represent and quantify the reliability model of a digital feedwater control system (DFWCS). The system state, i.e., whether a system fails or not, is determined by the status of the components that can be characterized by component failure modes. Starting from the system state that has no component failure, possible transitions out of it are all failure modes of all components in the system. Each additional component failure mode will formulate a different system state that may or may not be a system failure state. The Markov transition diagram is developed by strictly following the sequences of component failures (i.e., failure sequences) because the different orders of the same set of failures may affect the system in completely different ways. The formulation and quantification of the Markov model, together with the proposed FMEA (Failure Modes and Effects Analysis) approach, and the development of the supporting automated FMEA tool are considered the three major elements of a generic conceptual framework under which the reliability of digital systems can be assessed.

  10. Building HVAC Control System Interaction Issues: Two Case Studies

    E-Print Network [OSTI]

    Chen, Q.; Deng, S.; Toole, C.; Xu, C.

    2007-01-01T23:59:59.000Z

    Direct Digital Control (DDC) allows HVAC equipment to be controlled at an upper level (supervisory control) through commands from a central system, or at a lower-level (local-loop control) by local controllers. The various levels of equipment...

  11. Error-Control and Digitalization Concepts for Chemical and Biomolecular Information Processing Systems

    E-Print Network [OSTI]

    Vladimir Privman

    2010-04-26T23:59:59.000Z

    We consider approaches for controlling the buildup of noise by design of gates for chemical and biomolecular computing, in order to realize stable, scalable networks for multi-step information processing. Solvable rate-equation models are introduced and used to illustrate several recently developed concepts and methodologies. We also outline future challenges and possible research directions.

  12. Human Factors Guidance for Control Room and Digital Human-System Interface Design and Modification, Guidelines for Planning, Specification, Design, Licensing, Implementation, Training, Operation and Maintenance

    SciTech Connect (OSTI)

    R. Fink, D. Hill, J. O'Hara

    2004-11-30T23:59:59.000Z

    Nuclear plant operators face a significant challenge designing and modifying control rooms. This report provides guidance on planning, designing, implementing and operating modernized control rooms and digital human-system interfaces.

  13. Studies on the closed-loop digital control of multi-modular reactors

    SciTech Connect (OSTI)

    Bernard, J.A. (Massachusetts Inst. of Tech., Cambridge, MA (United States). Nuclear Reactor Lab.); Henry, A.F.; Lanning, D.D.; Meyer, J.E. (Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Nuclear Engineering)

    1992-11-01T23:59:59.000Z

    This report describes the theoretical development and the evaluation via both experiment and simulation of digital methods for the closed-loop control of power, temperature, and steam generator level in multi-modular reactors. The major conclusion of the research reported here is that the technology is currently available to automate many aspects of the operation of multi-modular plants. This will in turn minimize the number of required personnel and thus contain both operating and personnel costs, allow each module to be operated at a different power level thereby staggering the times at which refuelings would be needed, and maintain the competitiveness of US industry relative to foreign vendors who are developing and applying advanced control concepts. The technology described in this report is appropriate to the proposed multi-modular reactor designs and to present-generation pressurized water reactors. Its extension to boiling water reactors is possible provided that the commitment is made to create a real-time model of a BWR. The work reported here was performed by the Massachusetts Institute of Technology (MIT) under contract to the Oak Ridge National Laboratory (ORNL) and to the United States Department of Energy (Division of Industry and University Programs, Contract No. DE-FG07-90ER12930.)

  14. Studies on the closed-loop digital control of multi-modular reactors. Final report

    SciTech Connect (OSTI)

    Bernard, J.A. [Massachusetts Inst. of Tech., Cambridge, MA (United States). Nuclear Reactor Lab.; Henry, A.F.; Lanning, D.D.; Meyer, J.E. [Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Nuclear Engineering

    1992-11-01T23:59:59.000Z

    This report describes the theoretical development and the evaluation via both experiment and simulation of digital methods for the closed-loop control of power, temperature, and steam generator level in multi-modular reactors. The major conclusion of the research reported here is that the technology is currently available to automate many aspects of the operation of multi-modular plants. This will in turn minimize the number of required personnel and thus contain both operating and personnel costs, allow each module to be operated at a different power level thereby staggering the times at which refuelings would be needed, and maintain the competitiveness of US industry relative to foreign vendors who are developing and applying advanced control concepts. The technology described in this report is appropriate to the proposed multi-modular reactor designs and to present-generation pressurized water reactors. Its extension to boiling water reactors is possible provided that the commitment is made to create a real-time model of a BWR. The work reported here was performed by the Massachusetts Institute of Technology (MIT) under contract to the Oak Ridge National Laboratory (ORNL) and to the United States Department of Energy (Division of Industry and University Programs, Contract No. DE-FG07-90ER12930.)

  15. Influence of control strategy on the global efficiency of a Direct Wave Energy Converter with

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Influence of control strategy on the global efficiency of a Direct Wave Energy Converter, France Abstract--The choice of control strategy for Direct Wave Energy Converters (DWEC) is often a simple loss model in order to design a better control strategy. Keywords--Wave energy conversion; Point

  16. Digital Sensor Technology

    SciTech Connect (OSTI)

    Ted Quinn; Jerry Mauck; Richard Bockhorst; Ken Thomas

    2013-07-01T23:59:59.000Z

    The nuclear industry has been slow to incorporate digital sensor technology into nuclear plant designs due to concerns with digital qualification issues. However, the benefits of digital sensor technology for nuclear plant instrumentation are substantial in terms of accuracy, reliability, availability, and maintainability. This report demonstrates these benefits in direct comparisons of digital and analog sensor applications. It also addresses the qualification issues that must be addressed in the application of digital sensor technology.

  17. RESEARCH ARTICLE Controlling speed and direction during interception

    E-Print Network [OSTI]

    control models fail to explain two important aspects of locomotor interception: (1) how steering and speed. Turning rate was controlled using a steering wheel and speed was controlled using a foot pedal that is characteristic of visually guided interception. Like models of other visually guided actions, such as steering

  18. Digital Media Developing Digital

    E-Print Network [OSTI]

    Developing Digital Media Developing Digital Media Digital Media Case Study During 2012, IT Services component of student and staff development." In terms of the use of digital media for teaching, Mark Dixon this digital content, mentorship of paramedic students was informal and delivered locally. According to Mairéad

  19. Microprocessor controller for mold heating and cooling. Final report

    SciTech Connect (OSTI)

    Floersch, R.H.

    1986-04-01T23:59:59.000Z

    Microprocessor controllers were designed and implemented to perform direct digital control of the fluid and metal temperature-control loops used to temperature-cycle injection and compression molds. Microprocessor controllers replace a centralized computer system.

  20. Direct versus Facility Centric Load Control for Automated Demand Response

    E-Print Network [OSTI]

    Piette, Mary Ann

    2010-01-01T23:59:59.000Z

    Keywords: Demand response, automation, commercial buildings,Demand Response and Energy Efficiency in Commercial Buildings,Building Control Strategies and Techniques for Demand Response.

  1. Compact, Intelligent, Digitally Controlled IGBT Gate Drivers for a PEBB-Based ILC Marx Modulator

    SciTech Connect (OSTI)

    Nguyen, M.N.; Burkhart, C.; Olsen, J.J.; Macken, K.; /SLAC; ,

    2010-06-07T23:59:59.000Z

    SLAC National Accelerator Laboratory has built and is currently operating a first generation prototype Marx klystron modulator to meet ILC specifications. Under development is a second generation prototype, aimed at improving overall performance, serviceability, and manufacturability as compared to its predecessor. It is designed around 32 cells, each operating at 3.75 kV and correcting for its own capacitor droop. Due to the uniqueness of this application, high voltage gate drivers needed to be developed for the main 6.5 kV and droop correction 1.7 kV IGBTs. The gate driver provides vital functions such as protection of the IGBT from over-voltage and over-current, detection of gate-emitter open and short circuit conditions, and monitoring of IGBT degradation (based on collector-emitter saturation voltage). Gate drive control, diagnostic processing capabilities, and communication are digitally implemented using an FPGA. This paper details the design of the gate driver circuitry, component selection, and construction layout. In addition, experimental results are included to illustrate the effectiveness of the protection circuit.

  2. Claire Trevor School of the Arts Digital Arts Minor Requirements

    E-Print Network [OSTI]

    Rose, Michael R.

    A (Arts Core) _______ Arts 11 (Digital Media: History and Foundations) _______ Arts 12 (Digital Media: Current Directions) _______ Arts 50 (Digital Media: Experience and Content) _______ Arts 60 (Digital Media: Video/Audio for the Web) _______ Arts 70 (Digital Media: Interaction Design) _______ Arts

  3. 3180 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 55, NO. 9, SEPTEMBER 2008 Digital Control of a Low-Frequency Square-Wave

    E-Print Network [OSTI]

    inverter to avoid exciting acoustic resonances by controlling the FB as a buck con- verter and regulating and power regulation. Index Terms--Acoustic resonance, digital control, dimming control, low discharges" and in part by the National Science Foundation under project "CAREER: Modeling, Control

  4. Direction controllable linearly polarized laser from a dye-doped cholesteric liquid crystal

    E-Print Network [OSTI]

    Wu, Shin-Tson

    Direction controllable linearly polarized laser from a dye-doped cholesteric liquid crystal Ying demonstrate a direction controllable linearly polarized laser from a dye-doped cholesteric liquid crystal (CLC superposition of two orthogonal polarization states, the output laser light becomes linearly polarized and its

  5. Direct Frequency Comb Spectroscopy and High-Resolution Coherent Control

    E-Print Network [OSTI]

    Jin, Deborah

    stabilized the inter-pulse period and optical phases of the pulses emitted from a mode-locked Ti we demonstrate the phase sensitive excitation of a closed-loop four-level system in a diamond- and two-photon transitions using direct frequency comb spec- troscopy (DFCS). In particular we phase

  6. Surface control bent sub for directional drilling of petroleum wells

    DOE Patents [OSTI]

    Russell, Larry R. (6025 Edgemoor, Suite C, Houston, TX 77081)

    1986-01-01T23:59:59.000Z

    Directional drilling apparatus for incorporation in a drill string, wherein a lower apparatus section is angularly deviated from vertical by cam action and wherein rotational displacement of the angularly deviated apparatus section is overcome by additional cam action, the apparatus being operated by successive increases and decreases of internal drill string pressure.

  7. Directions

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Directions Where We Are Directions The Bradbury Science Museum is located at 1350 Central Avenue Los Alamos, NM 87544 Los Alamos (elevation 7,355 feet) is perched high atop the...

  8. Bi-directional power control system for voltage converter

    DOE Patents [OSTI]

    Garrigan, N.R.; King, R.D.; Schwartz, J.E.

    1999-05-11T23:59:59.000Z

    A control system for a voltage converter includes: a power comparator for comparing a power signal on input terminals of the converter with a commanded power signal and producing a power comparison signal; a power regulator for transforming the power comparison signal to a commanded current signal; a current comparator for comparing the commanded current signal with a measured current signal on output terminals of the converter and producing a current comparison signal; a current regulator for transforming the current comparison signal to a pulse width modulator (PWM) duty cycle command signal; and a PWM for using the PWM duty cycle command signal to control electrical switches of the converter. The control system may further include: a command multiplier for converting a voltage signal across the output terminals of the converter to a gain signal having a value between zero (0) and unity (1), and a power multiplier for multiplying the commanded power signal by the gain signal to provide a limited commanded power signal, wherein power comparator compares the limited commanded power signal with the power signal on the input terminals. 10 figs.

  9. Bi-directional power control system for voltage converter

    DOE Patents [OSTI]

    Garrigan, Neil Richard (Niskayuna, NY); King, Robert Dean (Schenectady, NY); Schwartz, James Edward (Slingerlands, NY)

    1999-01-01T23:59:59.000Z

    A control system for a voltage converter includes: a power comparator for comparing a power signal on input terminals of the converter with a commanded power signal and producing a power comparison signal; a power regulator for transforming the power comparison signal to a commanded current signal; a current comparator for comparing the commanded current signal with a measured current signal on output terminals of the converter and producing a current comparison signal; a current regulator for transforming the current comparison signal to a pulse width modulator (PWM) duty cycle command signal; and a PWM for using the PWM duty cycle command signal to control electrical switches of the converter. The control system may further include: a command multiplier for converting a voltage signal across the output terminals of the converter to a gain signal having a value between zero (0) and unity (1), and a power multiplier for multiplying the commanded power signal by the gain signal to provide a limited commanded power signal, wherein power comparator compares the limited commanded power signal with the power signal on the input terminals.

  10. Digital controls for plant control systems at the Ulchin 5 and 6 NPP: Lessons for the U.S. NPP retrofits?

    SciTech Connect (OSTI)

    McCreary, T.; Stevens, J. [HF Controls Corp., 16650 Westgrove, Addison, TX 75001 (United States)

    2006-07-01T23:59:59.000Z

    South Korea, through its nuclear operating arm, Korea Hydro and Nuclear Power, Ltd. (KHNP), has been one of the leading countries in the routine construction and operation of nuclear power plants. While standardizing on certain design approaches in the plant, KHNP continues to stress the need for the most reliable and cutting edge I and C technologies available for safety and non safety related NSSS and BOP functions. Its specifications are among the most challenging in the world with regard to the system performance and reliability requirements that must be met for the systems to be supplied. The Ulchin Units 5 and 6 (1000 MW each) nuclear power plants have been recently commissioned (2004 and 2005 respectively) with advanced programmable digital control systems in the NSSS and BOP (which includes both safety and non-safety applications). The systems supplied met what the authors believe are the most rigorous performance and functional specification criteria in use today. The authors will highlight a number of the specification requirements, the rationale for same and the plant experiences in the resultant supplied systems. As the existing U.S. nuclear fleet is faced with the prospect of upgrading legacy controls with digital controls, there are valuable lessons to be learned in the Ulchin 5 and 6 experiences that can be applied to retrofits and even new U.S. plant designs. Ulchin 5 and 6 is one of the success stories in the application of advanced digital technology to nuclear power plants. The specification focus that guided the selection and project execution for the digital controls supplied for Ulchin was on several key areas: a) a high reliable fault tolerant system, b)functional segmentation to minimize the failure effects on operation, c) validation and verification of the owner's engineer's application design (for regulatory compliance) as well as validation and verification of the system architecture and operation (to assure system performance met intended use); d)system performance criteria (system response time is critical to plant performance); e)global long term system support (HMI, control system components; communications); f)diversity (safety and non-safety; high integrity communication) The paper will review the key specification criteria, not only in context of a successful implementation for the Ulchin plant, but will also discuss applicability to the challenges of using digital controls in retrofit applications in U.S. nuclear power plants and in particular with regard to system performance and regulatory issues. (authors)

  11. Digital Object Identifier 10.1109/MCS.2009.935569 66 IEEE CONTROL SYSTEMS MAGAZINE APRIL 2010 1066-033X/10/$26.002010IEEE

    E-Print Network [OSTI]

    Giannakis, Georgios

    Digital Object Identifier 10.1109/MCS.2009.935569 66 IEEE CONTROL SYSTEMS MAGAZINE » APRIL 2010 the benefits of distrib- uted sensing and control. For example, in the target-tracking setup depicted in Figure. Restrictions apply. #12;APRIL 2010 « IEEE CONTROL SYSTEMS MAGAZINE 67 failing simultaneously is small. Thus

  12. ACTIVE SUSPENSION CONTROL WITH DIRECT-DRIVE TUBULAR LINEAR BRUSHLESS PERMANENT-MAGNET MOTOR

    E-Print Network [OSTI]

    Lee, Seungho

    2010-01-16T23:59:59.000Z

    Recently, active suspension has been applied to many commercial automobiles. To develop the control algorithm for active suspension, a quarter-car test bed was built by using a direct-drive tubular linear brushless permanent-magnet motor (LBPMM...

  13. Transferability of results from direct load-control (DLC) experiments. Final report

    SciTech Connect (OSTI)

    Babcock, W.H.; Eckel, J.W.

    1986-05-01T23:59:59.000Z

    The ability to use test data from another utility to estimate whether a proposed direct load-control program would be cost-effective could save a utility millions of dollars in experimentation costs. Though more work is necessary, this model represents a beginning for the reliable transfer of aggregate site-level data. A computer disk, ''Direct Load Control Impact Assessment Model,'' is included.

  14. Distributed Voltage and Current Control of Multi-Terminal High-Voltage Direct

    E-Print Network [OSTI]

    Dimarogonas, Dimos

    }@kth.se.) Abstract: High-voltage direct current (HVDC) is a commonly used technology for long-distance power for multi-terminal HVDC (MTDC) systems is proposed. Under certain conditions on the controller gains factor behind long-distance power transmission. High-voltage direct current (HVDC) is a commonly used

  15. Digital Plasmonics

    E-Print Network [OSTI]

    Gjonaj, Bergin; Johnson, Patrick M; Mosk, Allard P; Kuipers, Kobus; Lagendijk, Ad

    2010-01-01T23:59:59.000Z

    The field of plasmonics offers a route to control light fields with metallic nanostructures through the excitation of Surface Plasmon Polaritons (SPPs). These surface waves, bound to a metal dielectric interface, tightly confine electromagnetic energy. Active control over SPPs has potential for applications in sensing, photovoltaics, quantum communication, nano circuitry, metamaterials and super-resolution microscopy. We achieve here a new level of control of plasmonic fields using a digital spatial light modulator. Optimizing the plasmonic phases via feedback we focus SPPs at a freely pre-chosen point on the surface of a nanohole array with high resolution. Digital addressing and scanning of SPPs without mechanical motion will enable novel interdisciplinary applications of advanced plasmonic devices in cell microscopy, optical data storage and sensing.

  16. Direct power control of shunt active filter using high selectivity filter (HSF) under distorted or unbalanced conditions

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    4 Direct power control of shunt active filter using high selectivity filter (HSF) under distorted.A. Djaffar) Abstract This paper describes the design of a new configuration of direct power control (DPC, Direct power control (DPC), Switching table, High selectivity filter, Distorted or unbalanced conditions

  17. Direct power control of grid connected PV systems with three level NPC inverter

    SciTech Connect (OSTI)

    Alonso-Martinez, Jaime; Eloy-Garcia, Joaquin; Arnaltes, Santiago [Dept. of Electrical Engineering, University Carlos III of Madrid, Avda. Universidad 30, 28911 Leganes, Madrid (Spain)

    2010-07-15T23:59:59.000Z

    This paper presents the control of a three-level Neutral Point Clamped (NPC) voltage source inverter for grid connected photovoltaic (PV) systems. The control method used is the Extended Direct Power Control (EDPC), which is a generic approach for Direct Power Control (DPC) of multilevel inverters based on geometrical considerations. Maximum Power Point Tracking (MPPT) algorithms, that allow maximal power conversion into the grid, have been included. These methods are capable of extracting maximum power from each of the independent PV arrays connected to each DC link voltage level. The first one is a conventional MPPT which outputs DC link voltage references to EDPC. The second one is based on DPC concept. This new MPPT outputs power increment references to EDPC, thus avoiding the use of a DC link voltage regulator. The whole control system has been tested on a three-level NPC voltage source inverter connected to the grid and results confirm the validity of the method. (author)

  18. Sensorless Current Sharing in Digitally Controlled Two-Phase Buck DC-DC Converters

    E-Print Network [OSTI]

    current sharing [3-5, 9-11] and droop control [3, 6, 7]. Active current sharing relies on current sensing, droop control methods emulate a finite output resistance in each paralleled module in order

  19. Method of digital epitaxy by externally controlled closed-loop feedback

    DOE Patents [OSTI]

    Eres, D.; Sharp, J.W.

    1994-07-19T23:59:59.000Z

    A method and apparatus for digital epitaxy are disclosed. The apparatus includes a pulsed gas delivery assembly that supplies gaseous material to a substrate to form an adsorption layer of the gaseous material on the substrate. Structure is provided for measuring the isothermal desorption spectrum of the growth surface to monitor the active sites which are available for adsorption. The vacuum chamber housing the substrate facilitates evacuation of the gaseous material from the area adjacent the substrate following exposure. In use, digital epitaxy is achieved by exposing a substrate to a pulse of gaseous material to form an adsorption layer of the material on the substrate. The active sites on the substrate are monitored during the formation of the adsorption layer to determine if all the active sites have been filled. Once the active sites have been filled on the growth surface of the substrate, the pulse of gaseous material is terminated. The unreacted portion of the gas pulse is evacuated by continuous pumping. Subsequently, a second pulse is applied when availability of active sites is determined by studying the isothermal desorption spectrum. These steps are repeated until a thin film of sufficient thickness is produced. 4 figs.

  20. Method of digital epilaxy by externally controlled closed-loop feedback

    DOE Patents [OSTI]

    Eres, Djula (Knoxville, TN); Sharp, Jeffrey W. (Knoxville, TN)

    1994-01-01T23:59:59.000Z

    A method and apparatus for digital epitaxy. The apparatus includes a pulsed gas delivery assembly that supplies gaseous material to a substrate to form an adsorption layer of the gaseous material on the substrate. Structure is provided for measuring the isothermal desorption spectrum of the growth surface to monitor the active sites which are available for adsorption. The vacuum chamber housing the substrate facilitates evacuation of the gaseous material from the area adjacent the substrate following exposure. In use, digital epitaxy is achieved by exposing a substrate to a pulse of gaseous material to form an adsorption layer of the material on the substrate. The active sites on the substrate are monitored during the formation of the adsorption layer to determine if all the active sites have been filled. Once the active sites have been filled on the growth surface of the substrate, the pulse of gaseous material is terminated. The unreacted portion of the gas pulse is evacuated by continuous pumping. Subsequently, a second pulse is applied when availability of active sites is determined by studying the isothermal desorption spectrum. These steps are repeated until a thin film of sufficient thickness is produced.

  1. Direct

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign: Potential ApplicationYu,EnergyDimitriDirac ChargeDiracDirect

  2. Design and implementation of a digitally controlled multi-frequency microwave radiometer

    E-Print Network [OSTI]

    Warren, Gary Lynn

    1985-01-01T23:59:59.000Z

    . 21. Task-Exchange Diagram for DVMAIN Page 14 16 17 24 . 29 32 34 36 48 56 59 62 64 91 92 93 . 105 LIST OF SCHEWLTICS Schematics 1. Switch Decoder and Driver. 2. Motor Controller Hoard . . 3. Cold Load Controller . . . 4. Hot... of the software for radiometer control and data recording. TABLE OF CONTENTS ABSTRACT. . . . . . . . . . . . * TABLE OF CONTENTS LIST OF TABLES. LIST OF FIGURES LIST OF SCHEMATICS. CHAPTER I. INTRODUCTION. 1. 1 BACKGROUND . 1. 2 RADIOMETRY...

  3. Direct Adaptive Control of Electricity Demand S. Keshav and C. Rosenberg

    E-Print Network [OSTI]

    Waterloo, University of

    Report CS-2010-17 ABSTRACT The legacy electrical grid upper-bounds a customer's en- ergy demand using An electrical grid supplies reliable power to residential, industrial, and commercial customers by dynamicallyDirect Adaptive Control of Electricity Demand S. Keshav and C. Rosenberg School of Computer Science

  4. Off-axis directional acoustic wave beaming control by an asymmetric rubber heterostructures film

    E-Print Network [OSTI]

    Wang, Ji

    Off-axis directional acoustic wave beaming control by an asymmetric rubber heterostructures film rubber heterostructures film deposited on steel plate in water. The rubber heterostructures film at left side and right side are constructed by alternately stacking rubber-1 and rubber-2 film periodically

  5. INCREASED FLEXIBILITY OF TURBO-COMPRESSORS IN NATURAL GAS TRANSMISSION THROUGH DIRECT SURGE CONTROL

    SciTech Connect (OSTI)

    Robert J. McKee; Shane P. Siebenaler; Danny M. Deffenbaugh

    2005-02-25T23:59:59.000Z

    The objective of this Direct Surge Control project was to develop a new internal method to avoid surge of pipeline compressors. This method will safely expand the range and flexibility of compressor operations, while minimizing wasteful recycle flow at the lower end of the operating envelope. The approach is to sense the onset of surge with a probe that directly measures re-circulation at the impeller inlet. The signals from the probe are used by a controller to allow operation at low flow conditions without resorting to a predictive method requiring excessive margin to activate a recycle valve. The sensor developed and demonstrated during this project was a simple, rugged, and sensitive drag probe. Experiments conducted in a laboratory compressor clearly showed the effectiveness of the technique. Subsequent field demonstrations indicated that the increase in range without the need to recycle flow was on the order of 19% to 25%. The cost benefit of applying the direct surge control technology appears to be as much as $120 per hour per compressor for operation without the current level of recycle flow. This could amount to approximately $85 million per year for the U.S. Natural Gas Transmission industry, if direct surge control systems are applied to most pipeline centrifugal compressors.

  6. Minimization of DC Reactor and Operation Characteristics of Direct-Power-Controlled Current-Source PWM Rectifier

    E-Print Network [OSTI]

    Fujimoto, Hiroshi

    Minimization of DC Reactor and Operation Characteristics of Direct-Power-Controlled Current describes a direct-power-controlled current-source PWM rectifier, and presents operation characteristics modes on the basis of a relay control technique of instantaneous active and reactive power, using

  7. Study of the Stability of a Direct Stator Current Controller for a Doubly-Fed Induction Machine using the Complex

    E-Print Network [OSTI]

    Batlle, Carles

    Study of the Stability of a Direct Stator Current Controller for a Doubly-Fed Induction Machine #12;Study of the Stability of a Direct Stator Current Controller for a Doubly-Fed Induction Machine to renewable energy (wind farms in particular). The proposed control algorithm offers the advantages of proven

  8. Robust Power System Stabiliser Design Using Minimax Control Approach: Validation using Real-time Digital Simulation

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    Robust Power System Stabiliser Design Using Minimax Control Approach: Validation using Real Ugrinovskii1 Abstract-- This paper addresses the problem of designing decentralized power system stabilisers for interconnected power systems using robust output feedback minimax control tech- niques. We have considered

  9. Wide input range DC-DC converter with digital control scheme

    E-Print Network [OSTI]

    Harfman Todorovic, Maja

    2006-04-12T23:59:59.000Z

    In this thesis analysis and design of a wide input range DC-DC converter is proposed along with a robust power control scheme. The proposed converter and its control is designed to be compatible to a fuel cell power source, which exhibits 2...

  10. A Digitally Implemented Photovoltaic Simulator with a Double Current Mode Controller

    E-Print Network [OSTI]

    Kimball, Jonathan W.

    -DC converter-based photovoltaic (PV) simulator which emulates the output characteristics of a real solar panel data and a double current mode controller that regulates output current is implemented. In particular, the PV simulator designed is portable and has a maximum output power of 85W. The control

  11. The design of a digital voice-pitch control system for use by the handicapped

    E-Print Network [OSTI]

    Edwards, David Fredrick

    1972-01-01T23:59:59.000Z

    . The wheelchair controller can be used with any tactor wheel- chair. The unit is used for experimental purposes with an Everest 6 Jennings model 8U20-33R-76 electrically powered wheelchair g!]. The power ik furnished by two six-volt heavy duty tractor batteries... that can be recharged overnight by a portable battery charger. The elec- tronics for the controller is driven by one of the batteries As Dr. bewail originally recognised, there is a need i' or some form of feedback to the operator. The Hewe11 controller...

  12. Figure 1: A block diagram of a digitally controlled buck converter that incorporates self-tuning non-invasive ResrC estimator.

    E-Print Network [OSTI]

    Prodiæ, Aleksandar

    Prodi Laboratory for Power Management and Integrated SMPS ECE Department, University of Toronto, Toronto in the output voltage and require complex calculations, i.e. powerful processing unit. Such perturbations affect Power Digitally Controlled DC-DC Converters Aleksandar Radi, David Baik, Adrian Straka and Aleksandar

  13. BacNet and Analog/Digital Interfaces of the Building Controls...

    Office of Scientific and Technical Information (OSTI)

    This paper gives an overview of recent developments in the Building Controls Virtual Test Bed (BCVTB), a framework for co-simulation and hardware-in-the- loop. First, a general...

  14. A symbolic model approach to the digital control of nonlinear time-delay systems

    E-Print Network [OSTI]

    Pola, Giordano; Di Benedetto, Maria D; Tabuada, Paulo

    2009-01-01T23:59:59.000Z

    Time-delay systems are an important class of dynamical systems which provide a solid mathematical framework to deal with many application domains of interest ranging from biology, chemical, electrical, and mechanical engineering, to economics. However, the inherent complexity of such systems poses serious difficulties to control design, when control objectives depart from the standard ones investigated in the current literature, e.g. stabilization, regulation, and etc. In this paper we propose one approach to control design, which is based on the construction of symbolic models, where each symbolic state and each symbolic label correspond to an aggregate of continuous states and to an aggregate of input signals in the original system. The use of symbolic models offers a systematic methodology for control design in which constraints coming from software and hardware, interacting with the physical world, can be integrated. The main contribution of this paper is in showing that incrementally input-to-state stabl...

  15. Digital RF control system for superconducting cavity with Lorenz force detuning coefficient, Vol21

    E-Print Network [OSTI]

    Plawski, T

    2014-01-01T23:59:59.000Z

    The CEBAF at the Thomas Jefferson National Accelerator Facility (Jefferson Lab) a 6 GeV continuous electron beam accelerator is the world-leading facility in the experimental study of hadronic matter, a basic research in nuclear physics [1]. Nowadays the search for a fundamental description of nature, exceed Standard Model (SM) and is determine by two complementary strategies. First engage particle accelerators where two beams traveling in opposite directions collide head-on at very high energy. Particles created in the collision are analyzed using specialized detectors. The Large Hadron Collider at CERN, world’s most powerful particle accelerator where beam of protons or lead ions travel in opposite directions in separate beam pipes is a great illustration of such an approach. The second method is the collision of high energy beam with a target along with precision measurements of electron scattering (deflection). The results indicate a discrepancy with the SM prediction. This could expose the signature of...

  16. Digital RF control system for superconducting cavity with Lorenz force detuning coefficient

    E-Print Network [OSTI]

    Plawski, T

    2014-01-01T23:59:59.000Z

    The CEBAF at the Thomas Jefferson National Accelerator Facility (Jefferson Lab) a 6 GeV continuous electron beam accelerator is the world-leading facility in the experimental study of hadronic matter, a basic research in nuclear physics [1]. Nowadays the search for a fundamental description of nature, exceed Standard Model (SM) and is determine by two complementary strategies. First engage particle accelerators where two beams traveling in opposite directions collide head-on at very high energy. Particles created in the collision are analyzed using specialized detectors. The Large Hadron Collider at CERN, world’s most powerful particle accelerator where beam of protons or lead ions travel in opposite directions in separate beam pipes is a great illustration of such an approach. The second method is the collision of high energy beam with a target along with precision measurements of electron scattering (deflection). The results indicate a discrepancy with the SM prediction. This could expose the signature of...

  17. Abstract--This paper introduces modular masterless multi-phase architecture based on identical digitally controlled

    E-Print Network [OSTI]

    -identical connections from the converters to the shared load. Additionally, variations in compensator parameters, turn on identical modules. An overview of current sharing methods in the literature is given in Section II. Section current-sharing method, which is called the "chain control" algorithm, is introduced in Section IV

  18. Continuous-Time Digital Signal Processing Based Controller for High-Frequency DC-DC Converters

    E-Print Network [OSTI]

    Prodiæ, Aleksandar

    control have been recognized (flexibility, design portability, simple implementation of power management power switch on/off time is calculated from capacitor charge balance to prevent large overshoots's College Road, Toronto, ON, M5S 3G4, CANADA E-mail: Zhenyu @ power.utoronto.ca, vsmolyakov@ hotmail

  19. NEW OPTIMAL HIGH EFFICIENCY DSP-BASED DIGITAL CONTROLLER DESIGN FOR SUPER HIGH-SPEED PERMANENT

    E-Print Network [OSTI]

    Wu, Thomas

    magnet synchronous motors (PMSM). The PMSMs are a key component for the miniaturic cryocooler of a super high-speed PMSM is an important issue particularly for open-loop control, given that PMSM-speed PMSM is analyzed and some design suggestions are given to maximize this parameter. For ordinary motors

  20. INCREASED FLEXIBILITY OF TURBO-COMPRESSORS IN NATURAL GAS TRANSMISSION THROUGH DIRECT SURGE CONTROL

    SciTech Connect (OSTI)

    Robert J. McKee

    2003-05-01T23:59:59.000Z

    This preliminary phase 1 report summarizes the background and the work on the ''Increased Flexibility of Turbo-Compressors in Natural Gas Transmission through Direct Surge Control'' project to date. The importance of centrifugal compressors for natural gas transmission is discussed, and the causes of surge and the consequences of current surge control approaches are explained. Previous technology development, including findings from early GMRC research, previous surge detection work, and selected publications, are presented. The project is divided into three Phases to accomplish the project objectives of verifying near surge sensing, developing a prototype surge control system (sensor and controller), and testing/demonstrating the benefits of direct surge control. Specification for the direct surge control sensor and controller developed with guidance from the industry Oversight Committee is presented in detail. Results of CFD modeling conducted to aid in interpreting the laboratory test results are shown and explained. An analysis of the system dynamics identified the data sampling and handling requirements for direct surge control. A detailed design process for surge detection probes has been developed and explained in this report and has been used to prepare drag probes for the laboratory compressor test and the first field test. The surge detection probes prepared for testing have been bench tested and flow tested to determine and calibrate their sensitivity to flow forces as shown in data presented in this report. The surge detection drag probes have been shown to perform as expected and as required to detect approaching surge. Laboratory test results of surge detection in the SwRI centrifugal compressor demonstrated functionality of the surge detection probes and a change in the impeller inlet flow pattern prior to surge. Although the recirculation cannot be detected because of the specific geometry of this compressor, there are changes that indicate the approach of surge that can be detected. Preparations for a field test had been completed at one point in the project. However, a failure of the surge probe wiring just inside the compressor case has caused a delay in the field testing. Repairs for the wiring in the compressor have been scheduled and the field test will take place shortly after the repairs.

  1. Industrial Boiler Optimization Utilizing CO Control

    E-Print Network [OSTI]

    Ruoff, C. W.; Reiter, R. E.

    1980-01-01T23:59:59.000Z

    complex is the focus of many corporate and plant managers. This paper discusses the approach of a large chemical company that is effectively utilizing a direct digital control (DOC) system coupled with the measurement of carbon monoxide to optimize...

  2. Digital signal generation for wireless communication systems

    E-Print Network [OSTI]

    Rode, Jeremy

    2010-01-01T23:59:59.000Z

    Ko, “A CMOS 868/915 MHz Direct Conversion ZigBee Single-Chipof a direct digital-to-duty-cycle conversion circuit is the

  3. Sensorless Direct Torque Control For Salient Pole PMSM Based on Extended Kalman Filter Fed By AC/DC/AC Converter

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Sensorless Direct Torque Control For Salient ­ Pole PMSM Based on Extended Kalman Filter Fed By AC is proposed. The Direct Torque Control (DTC) technique for PMSM is receiving increasing attention due on the stochastic intromission, in others words, noise. The PMSM is fed by an indirect power electronic converter

  4. The Effects of Degraded Digital Instrumentation and Control Systems on Human-system Interfaces and Operator Performance: HFE Review Guidance and Technical Basis

    SciTech Connect (OSTI)

    O'Hara, J.M.; W. Gunther, G. Martinez-Guridi

    2010-02-26T23:59:59.000Z

    New and advanced reactors will use integrated digital instrumentation and control (I&C) systems to support operators in their monitoring and control functions. Even though digital systems are typically highly reliable, their potential for degradation or failure could significantly affect operator performance and, consequently, impact plant safety. The U.S. Nuclear Regulatory Commission (NRC) supported this research project to investigate the effects of degraded I&C systems on human performance and plant operations. The objective was to develop human factors engineering (HFE) review guidance addressing the detection and management of degraded digital I&C conditions by plant operators. We reviewed pertinent standards and guidelines, empirical studies, and plant operating experience. In addition, we conducted an evaluation of the potential effects of selected failure modes of the digital feedwater system on human-system interfaces (HSIs) and operator performance. The results indicated that I&C degradations are prevalent in plants employing digital systems and the overall effects on plant behavior can be significant, such as causing a reactor trip or causing equipment to operate unexpectedly. I&C degradations can impact the HSIs used by operators to monitor and control the plant. For example, sensor degradations can make displays difficult to interpret and can sometimes mislead operators by making it appear that a process disturbance has occurred. We used the information obtained as the technical basis upon which to develop HFE review guidance. The guidance addresses the treatment of degraded I&C conditions as part of the design process and the HSI features and functions that support operators to monitor I&C performance and manage I&C degradations when they occur. In addition, we identified topics for future research.

  5. Digital rotation measurement unit

    DOE Patents [OSTI]

    Sanderson, S.N.

    1983-09-30T23:59:59.000Z

    A digital rotation indicator is disclosed for monitoring the position of a valve member having a movable actuator. The indicator utilizes mercury switches adapted to move in cooperation with the actuator. Each of the switches produces an output as it changes state when the actuator moves. A direction detection circuit is connected to the switches to produce a first digital signal indicative of the direction of rotation of the actuator. A count pulse generating circuit is also connected to the switches to produce a second digital pulse signal having count pulses corresponding to a change of state of any of the mercury switches. A reset pulse generating circuit is provided to generate a reset pulse each time a count pulse is generated. An up/down counter is connected to receive the first digital pulse signal and the second digital pulse signal and to count the pulses of the second digital pulse signal either up or down depending upon the instantaneous digital value of the first digital signal whereby a running count indicative of the movement of the actuator is maintained.

  6. A digital governor for hydrogenerators

    SciTech Connect (OSTI)

    Murphy, L.D.; Wozniak, L. (Univ. of Illinois, Urbana, IL 61801 (US)); Whittemore, T.A. (US Dept. of Interior, Denver, CO (US))

    1988-12-01T23:59:59.000Z

    This paper describes the development and testing of a microcomputer-based digital governor for hydrogenators. The digital governor was shown to approximate the control function of existing analog controllers. This task was performed as a first step to future work intended to utilize the versatility of microcomputers in effecting more sophisticated control algorithms to improve hydrosystem operation.

  7. Integrated Direct/Indirect Adaptive Robust Precision Control of Linear Motor Drive Systems with Accurate Parameter Estimates

    E-Print Network [OSTI]

    Yao, Bin

    Integrated Direct/Indirect Adaptive Robust Precision Control of Linear Motor Drive Systems The focus of the paper is on the synthesis of nonlinear adaptive robust controllers for precision linear control of linear motor drive systems but with an improved estimation model, in which accurate parameter

  8. Abstract--This paper formulates and develops a peak demand control tool for electric systems within the framework of direct

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad Católica de Chile)

    techniques. Index Terms--Demand Side Management, direct load control, peak demand control, genetic algorithms in order to evaluate the suitability of the decision chosen. The Demand Side Management (DSM) plans attempt for central air conditioning systems in commercial buildings, hence allowing a measured control of peak demand

  9. Abstract--This paper formulates and develops a peak demand control tool for electric systems within the framework of direct

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad Católica de Chile)

    techniques. Index Terms--Demand Side Management, direct load control, peak demand control, genetic algorithms in order to evaluate the suitability of the decision chosen. Demand Side Management (DSM) plans attempt for central air conditioning systems in commercial buildings, hence allowing a measured control of peak demand

  10. Technical and economic assessment of particle control technology for direct coal fueled turbines: Final report

    SciTech Connect (OSTI)

    DiBella, C.A.W.; Thomas, R.L.; Rubow, L.N.; Zaharchuk, R.

    1987-02-01T23:59:59.000Z

    Gilbert/Commomwealth (1984) analyzed ten different concepts for high-temperature, high-pressure control of gas stream particulate matter in coal-fueled pressurized fluidized-bed combustion (PFBC) systems. This paper analyzes the five higher ranking concepts of the Gilbert study at direct coal fueled turbine conditions which are even more severe than PFBC conditions. The five concepts are ceramic crossflow filter, ceramic bag filter, granular bed filter, and advanced cyclones. Five ranking factors were used: economic, design, operations complexity, materials/mechanical, and development status. (DLC)

  11. Why Study Users? An Environmental Scan of Use and Users of Digital Resources in Humanities and Social Sciences Undergraduate Education

    E-Print Network [OSTI]

    Harley, Diane; Henke, Jonathan; Lawrence, Shannon

    2006-01-01T23:59:59.000Z

    L. 2003. Personal Digital Libraries: Creating IndividualWorkshop on Post-Digital Libraries Initiative Directions,learning objects, to digital library/museum collections, to

  12. DropBot: An open-source digital microfluidic control system with precise control of electrostatic driving force and instantaneous drop velocity measurement

    SciTech Connect (OSTI)

    Fobel, Ryan [Institute for Biomaterials and Biomedical Engineering, University of Toronto, 164 College St., Toronto, Ontario M5S 3G9 (Canada) [Institute for Biomaterials and Biomedical Engineering, University of Toronto, 164 College St., Toronto, Ontario M5S 3G9 (Canada); Donnelly Centre for Cellular and Biomolecular Research, 160 College St., Toronto, Ontario M5S 3E1 (Canada); Fobel, Christian [School of Computer Science, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1 (Canada)] [School of Computer Science, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1 (Canada); Wheeler, Aaron R. [Institute for Biomaterials and Biomedical Engineering, University of Toronto, 164 College St., Toronto, Ontario M5S 3G9 (Canada) [Institute for Biomaterials and Biomedical Engineering, University of Toronto, 164 College St., Toronto, Ontario M5S 3G9 (Canada); Donnelly Centre for Cellular and Biomolecular Research, 160 College St., Toronto, Ontario M5S 3E1 (Canada); Department of Chemistry, University of Toronto, 80 St. George St., Toronto, Ontario M5S 3H6 (Canada)

    2013-05-13T23:59:59.000Z

    We introduce DropBot: an open-source instrument for digital microfluidics (http://microfluidics.utoronto.ca/dropbot). DropBot features two key functionalities for digital microfluidics: (1) real-time monitoring of instantaneous drop velocity (which we propose is a proxy for resistive forces), and (2) application of constant electrostatic driving forces through compensation for amplifier-loading and device capacitance. We anticipate that this system will enhance insight into failure modes and lead to new strategies for improved device reliability, and will be useful for the growing number of users who are adopting digital microfluidics for automated, miniaturized laboratory operation.

  13. Directional Sensor Control for Maximizing Information Gain Shankarachary Ragia, Hans D. Mittelmannb, and Edwin K. P. Chonga

    E-Print Network [OSTI]

    Mittelmann, Hans D.

    , infrared sensors, and ultrasound sensors. These sensors are becoming increasingly important due to a wide locations are evaluated. Our goal is to assign each sensor to a particular direction such that the overallDirectional Sensor Control for Maximizing Information Gain Shankarachary Ragia, Hans D. Mittelmannb

  14. Utility-Scale Power Router: Dynamic Control of Grid Assets Using Direct AC Converter Cells

    SciTech Connect (OSTI)

    None

    2010-09-01T23:59:59.000Z

    ADEPT Project: Georgia Tech is developing a cost-effective, utility-scale power router that uses an enhanced transformer to more efficiently direct power on the grid. Existing power routing technologies are too expensive for widespread use, but the ability to route grid power to match real-time demand and power outages would significantly reduce energy costs for utilities, municipalities, and consumers. Georgia Tech is adding a power converter to an existing grid transformer to better control power flows at about 1/10th the cost of existing power routing solutions. Transformers convert the high-voltage electricity that is transmitted through the grid into the low-voltage electricity that is used by homes and businesses. The added converter uses fewer steps to convert some types of power and eliminates unnecessary power storage, among other improvements. The enhanced transformer is more efficient, and it would still work even if the converter fails, ensuring grid reliability.

  15. Direct control of the small-scale energy balance in 2D fluid dynamics

    E-Print Network [OSTI]

    Frank, Jason; Myerscough, Keith

    2014-01-01T23:59:59.000Z

    We explore the direct modification of the pseudo-spectral truncation of 2D, incompressible fluid dynamics to maintain a prescribed kinetic energy spectrum. The method provides a means of simulating fluid states with defined spectral properties, for the purpose of matching simulation statistics to given information, arising from observations, theoretical prediction or high fidelity simulation. In the scheme outlined here, Nos\\'e-Hoover thermostats, commonly used in molecular dynamics, are introduced as feedback controls applied to energy shells of the Fourier-discretized Navier-Stokes equations. As we demonstrate in numerical experiments, the dynamical properties (quantified using autocorrelation functions) are only modestly perturbed by our device, while ensemble dispersion is significantly enhanced in comparison with simulations of a corresponding truncation incorporating hyperviscosity.

  16. Goal-Directed Biped Stepping and Push Recovery with Momentum Control

    E-Print Network [OSTI]

    Wu, Chun-Chih

    2011-01-01T23:59:59.000Z

    model-predictive control. Computer Graphics Forum, 27(2),neuro- motor control models. Pacific Graphics, 2003. [96]biped walking control. ACM Transactions on Graphics, 29(3),

  17. Digital Full-Scope Simulation of a Conventional Nuclear Power Plant Control Room, Phase 2: Installation of a Reconfigurable Simulator to Support Nuclear Plant Sustainability

    SciTech Connect (OSTI)

    Ronald L. Boring; Vivek Agarwal; Kirk Fitzgerald; Jacques Hugo; Bruce Hallbert

    2013-03-01T23:59:59.000Z

    The U.S. Department of Energy’s Light Water Reactor Sustainability program has developed a control room simulator in support of control room modernization at nuclear power plants in the U.S. This report highlights the recent completion of this reconfigurable, full-scale, full-scope control room simulator buildout at the Idaho National Laboratory. The simulator is fully reconfigurable, meaning it supports multiple plant models developed by different simulator vendors. The simulator is full-scale, using glasstop virtual panels to display the analog control boards found at current plants. The present installation features 15 glasstop panels, uniquely achieving a complete control room representation. The simulator is also full-scope, meaning it uses the same plant models used for training simulators at actual plants. Unlike in the plant training simulators, the deployment on glasstop panels allows a high degree of customization of the panels, allowing the simulator to be used for research on the design of new digital control systems for control room modernization. This report includes separate sections discussing the glasstop panels, their layout to mimic control rooms at actual plants, technical details on creating a multi-plant and multi-vendor reconfigurable simulator, and current efforts to support control room modernization at U.S. utilities. The glasstop simulator provides an ideal testbed for prototyping and validating new control room concepts. Equally importantly, it is helping create a standardized and vetted human factors engineering process that can be used across the nuclear industry to ensure control room upgrades maintain and even improve current reliability and safety.

  18. DCC Briefing Paper: Digital Preservation 

    E-Print Network [OSTI]

    Pennock, Maureen

    2006-11-20T23:59:59.000Z

    Print materials can survive for centuries and even millennia without direct intervention. In contrast, digital materials may need active management and preservation in order to survive even a decade....

  19. Composition Control in the Direct Laser-Deposition Process R.R. UNOCIC and J.N. DuPONT

    E-Print Network [OSTI]

    DuPont, John N.

    Composition Control in the Direct Laser-Deposition Process R.R. UNOCIC and J.N. DuPONT Laser functionally graded material (FGM) components by selectively depositing different pow- der materials in the melt pool at specific locations in the structure during part buildup. The compo- sition in each layer

  20. Flight Path Tracking Based-on Direct Adaptive Sliding Mode Control Hakim Bouadi, H.Wu and F.Mora-Camino

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    .Mora-Camino Abstract-- Adaptive control algorithms are of interest in the flight control systems design not only of the proposed controller. I. INTRODUCTION The application of modern flight control design method- ologiesFlight Path Tracking Based-on Direct Adaptive Sliding Mode Control Hakim Bouadi, H.Wu and F

  1. Exploring Variety in Digital Collections and the Implications for Digital Preservation

    E-Print Network [OSTI]

    Smith, MacKenzie

    2005-01-01T23:59:59.000Z

    The amount of digital content produced at academic research institutions is large, and libraries and archives at these institutions have a responsibility to bring this digital material under curatorial control in order to ...

  2. Control strategy for hydrocarbon emissions in turbocharged direct injection spark ignition engines during cold-start

    E-Print Network [OSTI]

    Cedrone, Kevin David

    2013-01-01T23:59:59.000Z

    Gasoline consumption and pollutant emissions from transportation are costly and have serious, demonstrated environmental and health impacts. Downsized, turbocharged direct-injection spark ignition (DISI) gasoline engines ...

  3. Direct comparison of Neural Network, Fuzzy Logic and Model Prediction Variable Structure vortex flow controllers

    E-Print Network [OSTI]

    Joshi, Praveen Sudhakar

    1999-01-01T23:59:59.000Z

    Predictive Variable Structure and Fuzzy Logic based controllers for the same benchmark problem. Evaluation criteria consist of closed-loop system performance, activity level of the VFC nozzles, ease of controller synthesis, time required to synthesize...

  4. Ancillary Frequency Control of Direct Drive Full-Scale Converter Based Wind Power Plants

    E-Print Network [OSTI]

    Chen, Zhe

    as the studied power system. Simulation results show that the proposed control strategies are effective means into the modern power systems. In Denmark, the wind energy supplies around 20% of the annual electricity demand system frequency control solutions, such as frequency control from wind power plants may be needed

  5. Tryptophan depletion promotes habitual over goal-directed control of appetitive responding in humans

    E-Print Network [OSTI]

    Worbe, Yulia; Savulich, George; de Wit, Sanne; Fernandez-Egea, Emilio; Robbins, Trevor W.

    2015-02-06T23:59:59.000Z

    -directed and habitual action. Neuropsychopharmacology 35:48–69. Bayer J, Bandurski P, Sommer T (2013) Differential modulation ofvactivity related to the anticipation of monetary gains and losses across the menstrual cycle. European Journal of Neuroscience 38...

  6. Memory Efficiency and the Strategic Control of Attention at Encoding: Impairments of Value-Directed Remembering

    E-Print Network [OSTI]

    Memory Efficiency and the Strategic Control of Attention at Encoding: Impairments of Value of the strategic control of attention and the efficient use of memory. To examine whether aging and Alzheimer), and mild AD (N 13) showed impairments in the strategic and efficient encoding and recall of high value

  7. Systems & Control Letters 57 (2008) 805812 Contents lists available at ScienceDirect

    E-Print Network [OSTI]

    Krstic, Miroslav

    2008-01-01T23:59:59.000Z

    focuses mainly on electro-magneto-hydro-dynamic (EMHD) flow control for hydrodynamic drag reduction use of "ideal" sensors, can improve the efficiency, by reducing control power, for both streamwise [19 reduction is proposed for optimal mixing enhancement by blowing and suction. In [1], they discussed optimal

  8. Direct torque control of permanent magnet synchronous motors with non-sinusoidal back-EMF

    E-Print Network [OSTI]

    Ozturk, Salih Baris

    2009-05-15T23:59:59.000Z

    torque control of permanent magnet synchronous motor (PMSM) with sinusoidal back-EMF is discussed in detail. Secondly, the proposed two-phase conduction mode for DTC of BLDC motors is introduced in the constant torque region. In this control scheme, only...

  9. A Weighted Residual Framework for Formulation and Analysis of Direct Transcription Methods for Optimal Control 

    E-Print Network [OSTI]

    Singh, Baljeet

    2012-02-14T23:59:59.000Z

    In the past three decades, numerous methods have been proposed to transcribe optimal control problems (OCP) into nonlinear programming problems (NLP). In this dissertation work, a unifying weighted residual framework is developed under which most...

  10. Direct Torque Control for Interior Permanent Magnet Synchronous Motors with Respect to Optimal Efficiency

    E-Print Network [OSTI]

    Paderborn, Universität

    motors (PMSM) increased significantly. Thus, this motor type becomes more and more attractive for drive-axis current of the motor must not be controlled to zero, as it is common with non-salient PMSM. Thus

  11. CAVITY CONTROL ALGORITHM

    SciTech Connect (OSTI)

    Tomasz Plawski, J. Hovater

    2010-09-01T23:59:59.000Z

    A digital low level radio frequency (RF) system typically incorporates either a heterodyne or direct sampling technique, followed by fast ADCs, then an FPGA, and finally a transmitting DAC. This universal platform opens up the possibilities for a variety of control algorithm implementations. The foremost concern for an RF control system is cavity field stability, and to meet the required quality of regulation, the chosen control system needs to have sufficient feedback gain. In this paper we will investigate the effectiveness of the regulation for three basic control system algorithms: I&Q (In-phase and Quadrature), Amplitude & Phase and digital SEL (Self Exciting Loop) along with the example of the Jefferson Lab 12 GeV cavity field control system.

  12. Digital Loss-Minimizing Multi-Mode Synchronous Buck Converter Control Angel V. Peterchev Seth R. Sanders

    E-Print Network [OSTI]

    Sanders, Seth

    transition among the modes. An on-line adaptive algorithm to optimize the SR timing, based on power loss reducing the switching losses. In modern portable applications, minimizing power loss at light load in the controller, or can be obtained on-line by dynamically minimizing the converter power loss via multi

  13. Directly induced swing for closed loop control of electroslag remelting furnace

    DOE Patents [OSTI]

    Damkroger, B.

    1998-04-07T23:59:59.000Z

    An apparatus and method are disclosed for controlling an electroslag remelting furnace, imposing a periodic fluctuation on electrode drive speed and thereby generating a predictable voltage swing signal. The fluctuation is preferably done by imposition of a sine, square, or sawtooth wave on the drive dc offset signal. 8 figs.

  14. Systems & Control Letters 59 (2010) 8797 Contents lists available at ScienceDirect

    E-Print Network [OSTI]

    Leonard, Naomi

    2010-01-01T23:59:59.000Z

    and behavioral economics experiments to investigate human decision making. The human subject makes a choice & Control Letters journal homepage: www.elsevier.com/locate/sysconle Convergence in human decision 2010 Keywords: Human decision making Two-alternative forced-choice task Win-stay, lose-switch model

  15. Model Predictive Control for Energy Efficient Buildings

    E-Print Network [OSTI]

    Ma, Yudong

    2012-01-01T23:59:59.000Z

    control logic for building energy systems. Most moderncontrol actuators. Modern digital building automation systemssystem in the lab. The lab is equipped with a modern digital control

  16. Real-time control of PWM voltage source inverters using the TMS320C30 digital signal processing microprocessor

    E-Print Network [OSTI]

    Mitrani, Michael

    1994-01-01T23:59:59.000Z

    implementation for different control schemes. Real-time, closed- loop feedback techniques minimize output harmonic content and compensate for non- linear and unbalanced loads. Traditionally, PWM drives for power inverters have been implemented using analog... The Spectmm card is connected to three separate modules: 1. Voltage Sense 2. Parallel Port The DC supply, inverter and output filters comprise the power inverter. The inverter has input connections for TTL-level triggering signals for each of the three...

  17. Performance consequences of alternating directional control-response compatibility: Evidence from a coal mine shuttle car simulator

    SciTech Connect (OSTI)

    Zupanc, C.M.; Burgess-Limerick, R.J.; Wallis, G. [University of Queensland, St Lucia, Qld. (Australia)

    2007-08-15T23:59:59.000Z

    This experiment examines the performance of 48 novice participants in a virtual analogy of an underground coal mine shuttle car. Participants were randomly assigned to a compatible condition, an incompatible condition, an alternating condition in which compatibility alternated within and between hands, or an alternating condition in which compatibility alternated between hands. Participants made fewer steering direction errors and made correct steering responses more quickly in the compatible condition. Error rate decreased over time in the incompatible condition. A compatibility effect for both errors and reaction time was also found when the control-response relationship alternated; however, performance improvements over time were not consistent. Isolating compatibility to a hand resulted in reduced error rate and faster reaction time than when compatibility alternated within and between hands. Thus consequences of alternating control-response relationships are higher error rates and slower responses, at least in the early stages of learning. This research highlights the importance of ensuring consistently compatible human-machine directional control-response relationships.

  18. Closing Digital Divides, Increasing Digital Literacy

    E-Print Network [OSTI]

    Acton, Scott

    people s media ecology #12;2. MOBILE SHIFT #12;#12;THE MOBILE PARADOX #12;Are all digital media Closing Digital Divides, Increasing Digital Literacy S. Craig Watkins The University of Texas at Austin #12;4Shifts #12;1. Digital divides & Participation gaps (Jenkins 2006; Watkins 2012) #12;Young

  19. Active electron energy distribution function control in direct current discharge using an auxiliary electrode

    SciTech Connect (OSTI)

    Schweigert, I. V. [Institute of Theoretical and Applied Mechanics, Novosibirsk 630090 (Russian Federation) [Institute of Theoretical and Applied Mechanics, Novosibirsk 630090 (Russian Federation); George Washington University, Washington, DC 20052 (United States); Kaganovich, I. D. [Princeton Plasma Physics Laboratory, Princeton, NJ 08543 (United States)] [Princeton Plasma Physics Laboratory, Princeton, NJ 08543 (United States); Demidov, V. I. [West Virginia University, Morgantown, WV 26506 (United States) [West Virginia University, Morgantown, WV 26506 (United States); St. Petersburg State University, St. Petersburg (Russian Federation)

    2013-10-15T23:59:59.000Z

    The electron energy distribution functions are studied in the low voltage dc discharge with a constriction, which is a diaphragm with an opening. The dc discharge glows in helium and is sustained by the electron current emitted from a heated cathode. We performed kinetic simulations of dc discharge characteristics and electron energy distribution functions for different gas pressures (0.8 Torr-4 Torr) and discharge current of 0.1 A. The results of these simulations indicate the ability to control the shape of the electron energy distribution functions by variation of the diaphragm opening radius.

  20. Nonlocal control of electron temperature in short direct current glow discharge plasma

    SciTech Connect (OSTI)

    Demidov, V. I. [Department of Optics and Spectroscopy, St. Petersburg State University, St. Petersburg 199034 (Russian Federation); International Laboratory “Nonlocal Plasma in Nanotechnology and Medicine”, ITMO University, Kronverkskiy pr. 49, St. Petersburg 197101 (Russian Federation); Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506 (United States); Kudryavtsev, A. A.; Stepanova, O. M. [Department of Optics and Spectroscopy, St. Petersburg State University, St. Petersburg 199034 (Russian Federation); Kurlyandskaya, I. P. [International Laboratory “Nonlocal Plasma in Nanotechnology and Medicine”, ITMO University, Kronverkskiy pr. 49, St. Petersburg 197101 (Russian Federation); St. Petersburg University of State Fire Service of EMERCOM RF, Murmansk Branch, Murmansk 183040 (Russian Federation)

    2014-09-15T23:59:59.000Z

    To demonstrate controlling the electron temperature in nonlocal plasma, experiments have been performed on a short (without positive column) dc glow discharge with a cold cathode by applying different voltages to the conducting discharge wall. The experiments have been performed for low-pressure noble gas discharges. The applied voltage can modify trapping the energetic electrons emitted from the cathode sheath and arising from the atomic and molecular processes in the plasma within the device volume. This phenomenon results in the energetic electrons heating the slow plasma electrons, which consequently modifies the electron temperature. Furthermore, a numerical model of the discharge has demonstrated the electron temperature modification for the above case.

  1. DIGITAL Visual Fortran Error Messages

    E-Print Network [OSTI]

    , DIGITAL, FX!32, OpenVMS, VAX, VAX FORTRAN, and the DIGITAL logo are trademarks ofDigital Equipment

  2. DIGITAL Visual Fortran Language Reference

    E-Print Network [OSTI]

    , DIGITAL, FX!32, OpenVMS, VAX, VAX FORTRAN, and the DIGITAL logo are trademarks ofDigital Equipment

  3. The Dartmouth Digital Library Program

    E-Print Network [OSTI]

    Myers, Lawrence C.

    The Dartmouth Digital Library Program A Report from Dartmouth Digital Library Program 2 DIGITAL PROJECTS Resources Anthony Helm, Head of Digital Media and Library Technologies Wess

  4. Digital Image Processing The mathematics behind the pretty pictures

    E-Print Network [OSTI]

    Breuer, Florian

    Digital Image Processing The mathematics behind the pretty pictures Unlike many other branches endeavor. ­ George Wolberg in a quote equally applicable to computer vision and digital image processing of science, students of digital image warping benefit from the direct visual realization of mathematical

  5. JGI Digital Scavenger Hunt

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    JGI Digital Scavenger Hunt JGI Digital Scavenger Hunt The NERSC webpages are a great resource for New and Old users, so this is the first stop on the JGI Digital Scavenger Hunt....

  6. Emancipatory Digital Archaeology

    E-Print Network [OSTI]

    Morgan, Colleen

    2012-01-01T23:59:59.000Z

    Virtual Excavations: A role for digital media recording inShanks, M. (2007). Digital Media, Agile Design, and theAs archaeologists integrate digital media into all stages of

  7. High speed flux feedback for tuning a universal field oriented controller capable of operating in direct and indirect field orientation modes

    DOE Patents [OSTI]

    De Doncker, R.W.A.A.

    1992-09-01T23:59:59.000Z

    The direct (d) and quadrature (q) components of flux, as sensed by flux sensors or determined from voltage and current measurements in a direct field orientation scheme, are processed rapidly and accurately to provide flux amplitude and angular position values for use by the vector rotator of a universal field-oriented (UFO) controller. Flux amplitude (linear or squared) is provided as feedback to tune the UFO controller for operation in direct and indirect field orientation modes and enables smooth transitions from one mode to the other. 3 figs.

  8. High speed flux feedback for tuning a universal field oriented controller capable of operating in direct and indirect field orientation modes

    SciTech Connect (OSTI)

    De Doncker, Rik W. A. A. (Schenectady, NY)

    1992-01-01T23:59:59.000Z

    The direct (d) and quadrature (q) components of flux, as sensed by flux sensors or determined from voltage and current measurements in a direct field orientation scheme, are processed rapidly and accurately to provide flux amplitude and angular position values for use by the vector rotator of a universal field-oriented (UFO) controller. Flux amplitude (linear or squared) is provided as feedback to tune the UFO controller for operation in direct and indirect field orientation modes and enables smooth transitions from one mode to the other.

  9. Interaction of toluene with two-color asymmetric laser fields: Controlling the directional emission of molecular hydrogen fragments

    SciTech Connect (OSTI)

    Kaziannis, S.; Kotsina, N.; Kosmidis, C. [Department of Physics, Atomic and Molecular Physics Laboratory, University of Ioannina, University Campus, Ioannina GR-45110 (Greece)

    2014-09-14T23:59:59.000Z

    The interaction of toluene with strong asymmetric two-color laser irradiation of 40 fs duration is studied by means of Time of flight mass spectrometry. Highly energetic H{sub 2}{sup +} and H{sub 3}{sup +} fragment ions are produced through an isomerization process taking place within transient multiply charged parent ions. Comparative study of deuterium labeled toluene isotopes enables the discrimination between molecular hydrogen fragments formed exclusively within the CH{sub 3}- part from those that require hydrogen atom exchange between the former and the phenyl moiety. It is demonstrated that by manipulating the relative phase of the ?/2? field components the selective ionization of oriented toluene molecules can be used as a tool to control the directional emission of the H{sub 2}{sup +}, H{sub 3}{sup +} species.

  10. A Direct Stator Current Controller for a Doubly-Fed Induction A. D`oria-Cerezo, M. Bodson, C. Batlle and R. Ortega

    E-Print Network [OSTI]

    Batlle, Carles

    A Direct Stator Current Controller for a Doubly-Fed Induction Machine A. D`oria-Cerezo, M. Bodson-fed induction machine with specific applications to renewable energy (wind farms in particular). The proposed with the classical vector control method, where the doubly-fed induction machine is represented in a stator- flux

  11. Mesofluidic two stage digital valve

    DOE Patents [OSTI]

    Jansen, John F; Love, Lonnie J; Lind, Randall F; Richardson, Bradley S

    2013-12-31T23:59:59.000Z

    A mesofluidic scale digital valve system includes a first mesofluidic scale valve having a valve body including a bore, wherein the valve body is configured to cooperate with a solenoid disposed substantially adjacent to the valve body to translate a poppet carried within the bore. The mesofluidic scale digital valve system also includes a second mesofluidic scale valve disposed substantially perpendicular to the first mesofluidic scale valve. The mesofluidic scale digital valve system further includes a control element in communication with the solenoid, wherein the control element is configured to maintain the solenoid in an energized state for a fixed period of time to provide a desired flow rate through an orifice of the second mesofluidic valve.

  12. Digital Forensonomics the Economics of Digital Richard E Overill

    E-Print Network [OSTI]

    Overill, Richard E.

    of digital evidential traces. A case study involving an actual dis- tributed denial of service (DDoS, whilst essential to enable the launch of a DDoS attack, would not of itself be of high probative value that computer contained DDoS command and control (C&C) launch software at the material time would be of high

  13. High carrier mobility in orientation-controlled large-grain (?50??m) Ge directly formed on flexible plastic by nucleation-controlled gold-induced-crystallization

    SciTech Connect (OSTI)

    Park, Jong-Hyeok, E-mail: j-park@nano.ed.kyushu-u.ac.jp [Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395 (Japan); JSPS Research Fellow, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083 (Japan); Kasahara, Kenji; Hamaya, Kohei; Miyao, Masanobu; Sadoh, Taizoh, E-mail: sadoh@ed.kyushu-u.ac.jp [Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395 (Japan)

    2014-06-23T23:59:59.000Z

    High-carrier-mobility semiconductors on flexible-plastic are essential to realize flexible electronics. For this purpose, electrical properties of orientation-controlled large-grain Ge crystals on flexible-plastic directly formed by nucleation-controlled gold-induced-crystallization (GIC) are examined, and compared with those obtained by aluminum-induced-crystallization (AIC). The Ge crystals show p-type conductions. Here, hole concentrations are 2.2?×?10{sup 17} and 5.8?×?10{sup 20}?cm{sup ?3} for GIC-Ge and AIC-Ge, respectively, which are explained on the basis of the solubility of Au and Al in Ge. Thanks to the low hole concentration, GIC-Ge shows high hole mobility (160?cm{sup 2}?V{sup ?1}?s{sup ?1}) compared with AIC-Ge (37?cm{sup 2}?V{sup ?1}?s{sup ?1}). These demonstrate significant advantage of GIC to realize high-performance flexible-electronics.

  14. Digital Frequency Domain Multiplexer for mm-Wavelength Telescopes

    SciTech Connect (OSTI)

    Spieler, Helmuth G; Dobbs, Matt; Bissonnette, Eric; Spieler, Helmuth G.

    2007-07-23T23:59:59.000Z

    An FPGA based digital signal processing (DSP) system for biasing and reading out multiplexed bolometric detectors for mm-wavelength telescopes is presented. This readout system is being deployed for balloon-borne and ground based cosmology experiments with the primary goal of measuring the signature of inflation with the Cosmic Microwave Background Radiation. The system consists of analog superconducting electronics running at 250 mK and 4 K, coupled to digital room temperature backend electronics described here. The digital electronics perform the real time functionality with DSP algorithms implemented in firmware. A soft embedded processor provides all of the slow housekeeping control and communications. Each board in the system synthesizes multi-frequency combs of 8 to 32 carriers in the MHz band to bias the detectors. After the carriers have been modulated with the sky-signal by the detectors, the same boards digitize the comb directly. The carriers are mixed down to base-band and low pass filtered. The signal bandwidth of 0.050Hz-100 Hz places extreme requirements on stability and requires powerful filtering techniques to recover the sky-signal from the MHz carriers.

  15. Deemed Savings Estimates for Legacy Air Conditioning and WaterHeating Direct Load Control Programs in PJM Region

    SciTech Connect (OSTI)

    Goldman, Charles

    2007-03-01T23:59:59.000Z

    During 2005 and 2006, the PJM Interconnection (PJM) Load Analysis Subcommittee (LAS) examined ways to reduce the costs and improve the effectiveness of its existing measurement and verification (M&V) protocols for Direct Load Control (DLC) programs. The current M&V protocol requires that a PURPA-compliant Load Research study be conducted every five years for each Load-Serving Entity (LSE). The current M&V protocol is expensive to implement and administer particularly for mature load control programs, some of which are marginally cost-effective. There was growing evidence that some LSEs were mothballing or dropping their DLC programs in lieu of incurring the expense associated with the M&V. This project had several objectives: (1) examine the potential for developing deemed savings estimates acceptable to PJM for legacy air conditioning and water heating DLC programs, and (2) explore the development of a collaborative, regional, consensus-based approach for conducting monitoring and verification of load reductions for emerging load management technologies for customers that do not have interval metering capability.

  16. EMPOWERING DIGITAL SELF DETERMINATION

    E-Print Network [OSTI]

    Das, Rhiju

    : Communication and Digital Media 2. Data Context and Digital Personas 3. Personal Data: Use, ReuseEMPOWERING DIGITAL SELF DETERMINATION Symposium Summary Stanford University, Summer 2012 #12;#12;EMPOWERING DIGITAL SELF DETERMINATION Symposium, Stanford University, CA Summer, 2012 210 Panama Street

  17. Development of advanced direct perception displays for nuclear power plants to enhance monitoring, control and fault management

    SciTech Connect (OSTI)

    Jones, B.G.; Shaheen, S.; Moray, N. [and others

    1997-08-01T23:59:59.000Z

    Traditional Single-Sensor-Single Indicator (SSSI) displays are poorly matched to the cognitive abilities of operators, especially for large and complex systems. It is difficult for operators to monitor very large arrays of displays and controls, and to integrate the information displayed therein. In addition, standard operating procedures (SOPs) are bulky (running to many hundreds of pages) and difficult to use, and operators may become lost. For these reasons, and also because it is becoming increasingly difficult to find replacements for aging hardware components, there is a trend towards computerized graphical interfaces for nuclear power plants (NPPs). There is, however, little rational theory for display design in this domain. This report describes some recent theoretical developments and shows how to develop displays which will greatly reduce the cognitive load on the operator and allow the use of perceptual rather than cognitive mechanisms while using SON and to support state diagnosis and fault management. The report outlines the conceptual framework within which such a new approach could be developed, and provides an example of how the operating procedures for the start-up sequence of a NPP could be realized. A detailed description of a set of displays for a graphical interface for the SON of the feedwater system is provided as an example of how the proposed approach could be realized, and a general account of how it would fit into the overall start-up sequence is given. Examples of {open_quotes}direct perception{close_quotes} or {open_quotes}ecological{close_quotes} configural state space displays to support the use of the proposed direct manipulation SOP interface are provided, and also a critical discussion which identifies some difficulties which may be anticipated should the general approach herein advocated be adopted.

  18. DIGITAL ARCHITECTURE PROJECT PLAN

    SciTech Connect (OSTI)

    Thomas, Ken

    2014-09-01T23:59:59.000Z

    The objective of this project is to develop an industry consensus document on how to scope and implement the underlying information technology infrastructure that is needed to support a vast array of real-time digital technologies to improve NPP work efficiency, to reduce human error, to increase production reliability and to enhance nuclear safety. A consensus approach is needed because: • There is currently a wide disparity in nuclear utility perspectives and positions on what is prudent and regulatory-compliant for introducing certain digital technologies into the plant environment. For example, there is a variety of implementation policies throughout the industry concerning electromagnetic compatibility (EMC), cyber security, wireless communication coverage, mobile devices for workers, mobile technology in the control room, and so forth. • There is a need to effectively share among the nuclear operating companies the early experience with these technologies and other forms of lessons-learned. There is also the opportunity to take advantage of international experience with these technologies. • There is a need to provide the industry with a sense of what other companies are implementing, so that each respective company can factor this into their own development plans and position themselves to take advantage of new work methods as they are validated by the initial implementing companies. In the nuclear power industry, once a better work practice has been proven, there is a general expectation that the rest of the industry will adopt it. However, the long-lead time of information technology infrastructure could prove to be a delaying factor. A secondary objective of this effort is to provide a general understanding of the incremental investment that would be required to support the targeted digital technologies, in terms of an incremental investment over current infrastructure. This will be required for business cases to support the adoption of these new technologies.

  19. Chronopolis: Preserving our Digital Heritage

    E-Print Network [OSTI]

    Minor, David; Sutton, Don; Kozbial, Ardys; Burek, Michael; Smorul, Michael

    2009-01-01T23:59:59.000Z

    from the California Digital Library (CDL), geospatial databy the California Digital Library (CDL) and the Library ofby the Library of Congress' National Digital Information

  20. NUCLEAR PLANT AND CONTROL

    E-Print Network [OSTI]

    NUCLEAR PLANT OPERATIONS AND CONTROL KEYWORDS: software require- ments, safety analysis, formal, the missiles, and the digital protection systems embed- ded in nuclear power plants. Obviously, safety method SOFTWARE SAFETY ANALYSIS OF DIGITAL PROTECTION SYSTEM REQUIREMENTS USING A QUALITATIVE FORMAL

  1. Human Reliability Analysis for Digital Human-Machine Interfaces

    SciTech Connect (OSTI)

    Ronald L. Boring

    2014-06-01T23:59:59.000Z

    This paper addresses the fact that existing human reliability analysis (HRA) methods do not provide guidance on digital human-machine interfaces (HMIs). Digital HMIs are becoming ubiquitous in nuclear power operations, whether through control room modernization or new-build control rooms. Legacy analog technologies like instrumentation and control (I&C) systems are costly to support, and vendors no longer develop or support analog technology, which is considered technologically obsolete. Yet, despite the inevitability of digital HMI, no current HRA method provides guidance on how to treat human reliability considerations for digital technologies.

  2. INTELLISONDE TM Digital Radiosonde

    E-Print Network [OSTI]

    Groppi, Christopher

    conditions Operational simplicity Economical ­ low cost, lightweight, small balloon, minimal lift gas, humidity, pressure and battery voltage with digital precision. Sensor output is converted to digital words, temperature, humidity, battery voltage and a spare resistance channel. The measurement of resistance

  3. Digital Video, Digital TV IMPA -Instituto de Matemtica Pura e

    E-Print Network [OSTI]

    1 Digital Video, Digital TV and Beyond Luiz Velho IMPA - Instituto de Matemática Pura e Aplicada 2 Outline Video in the Digital Age Deployment of Digital Video Enabling Technologies Research @ VISGRAF Laboratory Trends and the Future... 3 Evolution of Digital Video 1st Generation - Analog / Digital Conversion

  4. Digital Library Initiative Rice University

    E-Print Network [OSTI]

    Digital Library Initiative Rice University Project Management General guidelines for digital projects Contact: dli (at) rice (dot) edu October, 2007 #12;Digital Library Initiative, Rice University................................................................................................8 #12;Guidelines for managing digital projects Page 2 STATEMENT OF PURPOSE We recognized

  5. DIGITAL Visual Fortran Programmer's Guide

    E-Print Network [OSTI]

    , FX!32, OpenVMS, VAX, VAX FORTRAN, and the DIGITAL logo are trademarks ofDigital Equipment Corporation

  6. PHYSICAL REVIEW A 83, 053617 (2011) Controlling directed transport of matter-wave solitons using the ratchet effect

    E-Print Network [OSTI]

    Carretero, Ricardo

    2011-01-01T23:59:59.000Z

    the ratchet effect M. Rietmann,1,* R. Carretero-Gonz´alez,1 and R. Chac´on2 1 Nonlinear Dynamical Systems that the dependence of the directed soliton current on the number of atoms is a consequence of the ratchet The ratchet effect, that is, directed transport without any net external force [1,2], has attracted enormous

  7. Digital Business RESEARCH BRIEF

    E-Print Network [OSTI]

    Center for Digital Business RESEARCH BRIEF Volume XIII Number 2 May 2011 2011 MIT Center for Digital Business, E. Brynjolfsson The 4 Ways IT is Driving Innovation Erik Brynjolfsson, Director, MIT Center for Digital Business and Schussel Professor, MIT Sloan School of Management Reprinted from Sloan

  8. Digital Business RESEARCH BRIEF

    E-Print Network [OSTI]

    of social software, and a July 2009 Prescient digital media survey revealed that 47% of respondents wereCenter for Digital Business RESEARCH BRIEF Volume XIII Number 1 May 2011 2011 MIT Center for Digital Business, A. McAfee Shattering the Myths About Enterprise 2.0 Andrew P. McAfee, Associate Director

  9. Journal of Process Control 22 (2012) 4150 Contents lists available at SciVerse ScienceDirect

    E-Print Network [OSTI]

    2012-01-01T23:59:59.000Z

    Automotive exhaust aftertreatment systems a b s t r a c t The problem studied in this article is the control

  10. Tension applied through the Dam1 complex promotes microtubule elongation: a direct mechanism for length control in

    E-Print Network [OSTI]

    Davis, Trisha N.

    Tension applied through the Dam1 complex promotes microtubule elongation: a direct mechanism tension to a model of the kinetochore-microtubule interface composed of the yeast Dam1 complex11-13 bound

  11. A 3D finite-element modelling investigation into optimal survey parameters and direct imaging for marine controlled-source electromagnetic surveys

    E-Print Network [OSTI]

    Lau, Ryan

    2007-09-17T23:59:59.000Z

    frequency electromagnetic signal into the sea and downwards into the seabed. A transmitter is typically towed behind a ship to various offsets at which time an electromagnetic field is emitted from the dipole. The primary electromagnetic (EM) energy... possible direct hydrocarbon indicator for deep-sea prospects using EM energy: Oil & Gas Journal 100, 19, 30-38. MacGregor, L., and Sinha, M., 2000, Use of marine controlled-source electromagnetic sounding sub-basalt exploration: Geophysical...

  12. The FreeD - A Handheld Digital Milling Device for Craft and Fabrication

    E-Print Network [OSTI]

    Paradiso, Joseph

    We present an approach to combine digital fabrication and craft that is focused on a new fabrication experience. The FreeD is a hand-held, digitally controlled, milling device. It is guided and monitored by a computer while ...

  13. CH Analog/Digital Service CH Analog/Digital Service CH Analog/Digital Service CH Analog/Digital Service 2 Analog CBB 30.1 Digital MTV2 65 Digital NFL HD 100 Digital Hit List

    E-Print Network [OSTI]

    Linhardt, Robert J.

    Dance/Electronica 5 Digital WTEN (ABC) 31.1 Digital TruTV 72 Analog ENGTV 104 Digital Rap 6 Analog WRGB

  14. Digital Video 1 DIGITAL VIDEO, LEARNING STYLES AND STUDENT UNDERSTANDING

    E-Print Network [OSTI]

    Larkin, Teresa L.

    Digital Video 1 DIGITAL VIDEO, LEARNING STYLES AND STUDENT UNDERSTANDING Digital Video, Learning University in 1997. Her doctoral work involved the assessment of and interactive digital video technique #12;Digital Video 2 teachers, particularly those teachers whose background does not include

  15. ACM Reference Format Todo, H., Anjyo, K., Baxter, W., Igarashi, T. 2007. Locally Controllable Stylized Shading. ACM Trans. Graph.

    E-Print Network [OSTI]

    Igarashi, Takeo

    .1145/1239451.1239468 Locally Controllable Stylized Shading Hideki Todo The University of Tokyo Ken-ichi Anjyo OLM Digital, Inc. William Baxter OLM Digital, Inc. Takeo Igarashi§ The University of Tokyo Figure 1: Comparison-photorealistic rendering, stylized shading, direct manipulation e-mail: td-rg7@ui.is.s.u-tokyo.ac.jp e-mail: anjyo@olm

  16. Digitization Best Practices

    SciTech Connect (OSTI)

    Xue, Fei [Los Alamos National Laboratory; Holtkamp, Irma S. [Los Alamos National Laboratory; Knudson, Frances L. [Los Alamos National Laboratory

    2012-07-31T23:59:59.000Z

    This project involved performing tests and documenting results to determine best practices for digitizing older print documents. The digitization process is complicated, especially when original documents exhibit non-standard fonts and are faded. Tests focused on solutions to improve high quality scanning, increase OCR accuracy, and efficiently use embedded metadata. Results are summarized. From the test results on the right sides, we know that when we plan to digitize documents, we should balance Quantity and Quality based on our expectation, and then make final decision for the digitization process.

  17. Digital Libraries - Meeting the Challenges

    E-Print Network [OSTI]

    Warner, Beth Forrest

    2001-02-27T23:59:59.000Z

    Digital Libraries – Meeting the Challenges Beth Forrest Warner Digital Library Challenges Are … … not just Digital Library challenges They are many of the same challenges facing libraries and scholarly communication in general... learning contexts In short, change … … leading to new organizational structures Challenges of Definition and Purpose What are Digital Libraries?? What’s their purpose?? A Digital Library Is: Selected and managed...

  18. Digital electronic bone growth stimulator

    DOE Patents [OSTI]

    Kronberg, J.W.

    1995-05-09T23:59:59.000Z

    A device is described for stimulating bone tissue by applying a low level alternating current signal directly to the patient`s skin. A crystal oscillator, a binary divider chain and digital logic gates are used to generate the desired waveforms that reproduce the natural electrical characteristics found in bone tissue needed for stimulating bone growth and treating osteoporosis. The device, powered by a battery, contains a switch allowing selection of the correct waveform for bone growth stimulation or osteoporosis treatment so that, when attached to the skin of the patient using standard skin contact electrodes, the correct signal is communicated to the underlying bone structures. 5 figs.

  19. Digital electronic bone growth stimulator

    DOE Patents [OSTI]

    Kronberg, James W. (Aiken, SC)

    1995-01-01T23:59:59.000Z

    A device for stimulating bone tissue by applying a low level alternating current signal directly to the patient's skin. A crystal oscillator, a binary divider chain and digital logic gates are used to generate the desired waveforms that reproduce the natural electrical characteristics found in bone tissue needed for stimulating bone growth and treating osteoporosis. The device, powered by a battery, contains a switch allowing selection of the correct waveform for bone growth stimulation or osteoporosis treatment so that, when attached to the skin of the patient using standard skin contact electrodes, the correct signal is communicated to the underlying bone structures.

  20. Digital radiographic systems detect boiler tube cracks

    SciTech Connect (OSTI)

    Walker, S. [EPRI, Charlotte, NC (United States)

    2008-06-15T23:59:59.000Z

    Boiler water wall leaks have been a major cause of steam plant forced outages. But conventional nondestructive evaluation techniques have a poor track record of detecting corrosion fatigue cracking on the inside surface of the cold side of waterwall tubing. EPRI is performing field trials of a prototype direct-digital radiographic system that promises to be a game changer. 8 figs.

  1. Economic Incentives for Protecting Digital Rights Online

    E-Print Network [OSTI]

    Wright , Matthew

    Economic Incentives for Protecting Digital Rights Online N. Boris Margolina, , Brian Neil Levineb propose the use of economic incentives to both limit and detect unautho- rized sharing. This approach has using direct economic incentives to discourage illegitimate shar- ing and to detect it when it occurs

  2. Pre-publication review. Virtual Slavica: Digital Libraries, Digital Archives

    E-Print Network [OSTI]

    Giullian, Jon C.

    2005-01-01T23:59:59.000Z

    Reviews the book "Virtual Slavica: Digital Libraries, Digital Archives," the first major work to address the issue of technology and Cyrillic language resources, thus providing an important “snapshot of Slavic digital librarianship...

  3. Digital Archeology: Recovering Digital Objects from Audio Waveforms

    E-Print Network [OSTI]

    Guttenbrunner, Mark; Ghete, Mihai; John, Annu; Lederer, Chrisanth; Rauber, Andreas

    2009-01-01T23:59:59.000Z

    data (e.g. digital diaries) on various storage media. As weJ. (1998) Storage Media Life Expectancies. Digital Archivein the digital archive. A popular storage media for home

  4. Directives Tools

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    Useful links and resources for Directives Writers, Directives Point of Contact (DPCs), Subject Matter Experts (SMEs), and Draft Directive Reviewers.

  5. Journal of Process Control 23 (2013) 5869 Contents lists available at SciVerse ScienceDirect

    E-Print Network [OSTI]

    Skogestad, Sigurd

    performance is here quantified using the state drift criterion and the method is evaluated on two distillation column case studies with one, two or more closed loops. © 2012 Elsevier Ltd. All rights reserved. 1.g. using MPC with no lower-layer PID controllers) would be optimal from a theoretical point of view

  6. Gain-scheduled LPV/H controller based on direct yaw moment and active steering for vehicle handling improvements

    E-Print Network [OSTI]

    Boyer, Edmond

    in vehicle handling and stability. I. INTRODUCTION A close examination of accident data reveals that losing the vehicle control is responsible for a huge proportion of car accidents. Under critical driving, and dangerous accidents could happen. To ensure vehicle stability and handling, many advanced active chassis

  7. Real-Time Vision-Based Control of a Nonholonomic Mobile Robot1 , R. Fierro, V. Kumar, B. Southall, J. Spletzer, and C. J. Taylor

    E-Print Network [OSTI]

    Spletzer, John R.

    made to improve shock absorption and to house an omni- directional vision system, a 2.4 GHz wireless video transmitter, and a battery pack. The robot has a servo controller on board for steering and a digital proportional speed controller for forward/backward motion. A parallel port interface, also

  8. Inferring Motor Programs from Images of Handwritten Digits

    E-Print Network [OSTI]

    Hinton, Geoffrey E.

    Inferring Motor Programs from Images of Handwritten Digits Geoffrey Hinton and Vinod Nair whose stiffnesses are controlled by a motor program. We show how neural networks can be trained to infer the motor programs required to accurately reconstruct the MNIST digits. The inferred motor programs can

  9. Digital I and C system upgrade integration technique

    SciTech Connect (OSTI)

    Huang, H. W. [Inst. of Nuclear Energy Research (INER), No. 1000, Wenhua Road, Chiaan Village, Longtan Township, Taoyuan County, 32546, Taiwan (China); Shih, C. [Inst. of Nuclear Engineering and Science, National Tsing Hua Univ., 101, Sec. 2, Kuang Fu Rd, Hsinchu, Taiwan (China); Wang, J. R. [Inst. of Nuclear Energy Research (INER), No. 1000, Wenhua Road, Chiaan Village, Longtan Township, Taoyuan County, 32546, Taiwan (China); Huang, K. C. [Inst. of Nuclear Engineering and Science, National Tsing Hua Univ., 101, Sec. 2, Kuang Fu Rd, Hsinchu, Taiwan (China)

    2012-07-01T23:59:59.000Z

    This work developed an integration technique for digital I and C system upgrade, the utility can replace the I and C systems step by step systematically by this method. Inst. of Nuclear Energy Research (INER) developed a digital Instrumentation and Control (I and C) replacement integration technique on the basis of requirement of the three existing nuclear power plants (NPPs), which are Chin-Shan (CS) NPP, Kuo-Sheng (KS) NPP, and Maanshan (MS) NPP, in Taiwan, and also developed the related Critical Digital Review (CDR) Procedure. The digital I and C replacement integration technique includes: (I) Establishment of Nuclear Power Plant Digital Replacement Integration Guideline, (2) Preliminary Investigation on I and C System Digitalization, (3) Evaluation on I and C System Digitalization, and (4) Establishment of I and C System Digitalization Architectures. These works can be a reference for performing I and C system digital replacement integration of the three existing NPPs of Taiwan Power Company (TPC). A CDR is the review for a critical system digital I and C replacement. The major reference of this procedure is EPRI TR- 1011710 (2005) 'Handbook for Evaluating Critical Digital Equipment and Systems' which was published by the Electric Power Research Inst. (EPRI). With this document, INER developed a TPC-specific CDR procedure. Currently, CDR becomes one of the policies for digital I and C replacement in TPC. The contents of this CDR procedure include: Scope, Responsibility, Operation Procedure, Operation Flow Chart, CDR review items. The CDR review items include the comparison of the design change, Software Verification and Validation (SVandV), Failure Mode and Effects Analysis (FMEA), Evaluation of Diversity and Defense-in-depth (D3), Evaluation of Watchdog Timer, Evaluation of Electromagnetic Compatibility (EMC), Evaluation of Grounding for System/Component, Seismic Evaluation, Witness and Inspection, Lessons Learnt from the Digital I and C Failure Events. A solid review can assure the quality of the digital I and C system replacement. (authors)

  10. Modelling, simulation and analysis of low-cost direct torque control of PMSM using hall-effect sensors

    E-Print Network [OSTI]

    Ozturk, Salih Baris

    2007-04-25T23:59:59.000Z

    +steady-state)........................................................175 8.27. Agitation speed control test-bed...................................................................176 8.28. Load torque ( L ), , , and at a 0.35 second ramp time emref emest emact when the PI integrator initial value is 7... N?m................................................182 8.29. s? (Reference Stator Flux), _s est and _s act at a 0.35 second ramp time when the PI integrator initial value is 7 N?m................................................183 8...

  11. Parallel digital forensics infrastructure.

    SciTech Connect (OSTI)

    Liebrock, Lorie M. (New Mexico Tech, Socorro, NM); Duggan, David Patrick

    2009-10-01T23:59:59.000Z

    This report documents the architecture and implementation of a Parallel Digital Forensics infrastructure. This infrastructure is necessary for supporting the design, implementation, and testing of new classes of parallel digital forensics tools. Digital Forensics has become extremely difficult with data sets of one terabyte and larger. The only way to overcome the processing time of these large sets is to identify and develop new parallel algorithms for performing the analysis. To support algorithm research, a flexible base infrastructure is required. A candidate architecture for this base infrastructure was designed, instantiated, and tested by this project, in collaboration with New Mexico Tech. Previous infrastructures were not designed and built specifically for the development and testing of parallel algorithms. With the size of forensics data sets only expected to increase significantly, this type of infrastructure support is necessary for continued research in parallel digital forensics. This report documents the implementation of the parallel digital forensics (PDF) infrastructure architecture and implementation.

  12. Cost Model for Digital Curation: Cost of Digital Migration

    E-Print Network [OSTI]

    Kejser, Ulla Bøgvad; Nielsen, Anders Bo; Thirifays, Alex

    2009-01-01T23:59:59.000Z

    media/documents/publications/keep ingresearchdatasafe0408.pdf Blue Ribbon Task Force on Sustainable Digital

  13. High-rate x-ray spectroscopy in mammography with a CdTe detector: A digital pulse processing approach

    SciTech Connect (OSTI)

    Abbene, L.; Gerardi, G.; Principato, F.; Del Sordo, S.; Ienzi, R.; Raso, G. [Dipartimento di Fisica e Tecnologie Relative, Universita di Palermo, Viale delle Scienze, Edificio 18, Palermo 90128 (Italy) and INAF/IASF Palermo, Via Ugo La Malfa 153, 90146 Palermo (Italy); Dipartimento di Fisica e Tecnologie Relative, Universita di Palermo, Viale delle Scienze, Edificio 18, Palermo 90128 (Italy); INAF/IASF Palermo, Via Ugo La Malfa 153, 90146 Palermo (Italy); Istituto di Radiologia, Policlinico, 90100 Palermo (Italy); Dipartimento di Fisica e Tecnologie Relative, Universita di Palermo, Viale delle Scienze, Edificio 18, Palermo 90128 (Italy)

    2010-12-15T23:59:59.000Z

    Purpose:Direct measurement of mammographic x-ray spectra under clinical conditions is a difficult task due to the high fluence rate of the x-ray beams as well as the limits in the development of high resolution detection systems in a high counting rate environment. In this work we present a detection system, based on a CdTe detector and an innovative digital pulse processing (DPP) system, for high-rate x-ray spectroscopy in mammography. Methods: The DPP system performs a digital pile-up inspection and a digital pulse height analysis of the detector signals, digitized through a 14-bit, 100 MHz digitizer, for x-ray spectroscopy even at high photon counting rates. We investigated on the response of the digital detection system both at low (150 cps) and at high photon counting rates (up to 500 kcps) by using monoenergetic x-ray sources and a nonclinical molybdenum anode x-ray tube. Clinical molybdenum x-ray spectrum measurements were also performed by using a pinhole collimator and a custom alignment device. Results: The detection system shows excellent performance up to 512 kcps with an energy resolution of 4.08% FWHM at 22.1 keV. Despite the high photon counting rate (up to 453 kcps), the molybdenum x-ray spectra, measured under clinical conditions, are characterized by a low number of pile-up events. The agreement between the attenuation curves and the half value layer values, obtained from the measured spectra, simulated spectra, and from the exposure values directly measured with an ionization chamber, also shows the accuracy of the measurements. Conclusions: These results make the proposed detection system a very attractive tool for both laboratory research and advanced quality controls in mammography.

  14. Digital sonar system

    DOE Patents [OSTI]

    Young, K.K.; Wilkes, R.J.

    1995-11-21T23:59:59.000Z

    A transponder of an active digital sonar system identifies a multifrequency underwater activating sonar signal received from a remote sonar transmitter. The transponder includes a transducer that receives acoustic waves, including the activating sonar signal, and generates an analog electrical receipt signal. The analog electrical receipt signal is converted to a digital receipt signal and cross-correlated with a digital transmission signal pattern corresponding to the activating sonar signal. A relative peak in the cross-correlation value is indicative of the activating sonar signal having been received by the transponder. In response to identifying the activating sonar signal, the transponder transmits a responding multifrequency sonar signal. 4 figs.

  15. Virtual mask digital electron beam lithography

    DOE Patents [OSTI]

    Baylor, Larry R. (Farragut, TN); Thomas, Clarence E. (Knoxville, TN); Voelkl, Edgar (Oak Ridge, TN); Moore, James A. (Powell, TN); Simpson, Michael L. (Knoxville, TN); Paulus, Michael J. (Knoxville, TN)

    1999-01-01T23:59:59.000Z

    Systems and methods for direct-to-digital holography are described. An apparatus includes a laser; a beamsplitter optically coupled to the laser; a reference beam mirror optically coupled to the beamsplitter; an object optically coupled to the beamsplitter, a focusing lens optically coupled to both the reference beam mirror and the object; and a digital recorder optically coupled to the focusing lens. A reference beam is incident upon the reference beam mirror at a non-normal angle, and the reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form an image. The systems and methods provide advantages in that computer assisted holographic measurements can be made.

  16. Architectures and system design for digitally-enhanced antenna arrays

    E-Print Network [OSTI]

    Krieger, James David, 1978-

    2014-01-01T23:59:59.000Z

    Digital techniques have had longstanding use in both the operational control and signal processing efforts associated with phased array antennas. Fundamentally, these techniques have served to provide additional levels of ...

  17. Use of a directional spray system design to control respirable dust and free gas concentrations around a continuous mining machine

    SciTech Connect (OSTI)

    Goodman, G.V.R.; Pollock, D.E. [NIOSH, Pittsburgh, PA (US). Pittsburgh Research Lab.

    2004-12-15T23:59:59.000Z

    A laboratory study assessed the impacts of water spray pressure, face ventilation quantity, and line brattice setback distance on respirable dust and SF6 tracer gas concentrations around a continuous mining machine using a sprayfan or directional spray system. Dust levels were measured at locations representing the mining machine operator and the standard and off standard shuttle car operators, and in the return airway. The results showed that changes in all three independent variables significantly affected log-transformed dust levels at the three operator sampling locations. Changes in setback distance impacted return airway dust levels. Laboratory testing also identified numerous variable interactions affecting dust levels. Tracer gas levels were measured on the left and right sides of the cutting drum and in the return. Untransformed gas levels around the cutting drum were significantly affected by changes in water pressure, face ventilation quantity, and setback distance. Return gas levels measured at the low curtain quantity were generally unaffected by changes in water pressure or curtain setback distance. At the high curtain quantity, return airway gas levels were affected by curtain setback distance. A field study was conducted to assess the impact of these parameters in an actual mining operation. These data showed that respirable dust levels may have been impacted by a change in water pressure and, to a lesser extent, by an increase in curtain setback distance. A series of tracer gas pulse tests were also conducted during this study. The results showed that effectiveness of the face ventilation was impacted by changes in curtain flow quantity and setback distance.

  18. Digital Tomosynthesis: Advanced Breast Cancer

    E-Print Network [OSTI]

    Fygenson, Deborah Kuchnir

    creating an image. · A newer process, called full field digital mammography uses digital receptors. #12Digital Tomosynthesis: Advanced Breast Cancer Imaging Technique Max Wiedmann #12;Digital Bremsstrahlung, a process in which electrons are accelerated against an anode, causing photons to be fired off

  19. Digital Technology Group Computer Laboratory

    E-Print Network [OSTI]

    Cambridge, University of

    Digital Technology Group 1/20 Computer Laboratory Digital Technology Group Computer Laboratory William R Carson Building on the presentation by Francisco Monteiro Matlab #12;Digital Technology Group 2/20 Computer Laboratory Digital Technology Group Computer Laboratory The product: MATLAB® - The Language

  20. Inter-Faculty Digital Journalism

    E-Print Network [OSTI]

    Inter-Faculty Digital Journalism As media migrate to digital platforms, this has created a need, alternative and citizen media. A Rigorous, Enriching Program UWindsor's Digital Journalism program unites changing digital marketplace. Our objective is to produce journalists who can find work in mainstream

  1. Mediating Contradictions of Digital Media

    E-Print Network [OSTI]

    Barrett, Jeffrey A.

    675 Mediating Contradictions of Digital Media Yong Ming Kow* and Bonnie Nardi** Introduction replied. "No no!" said Arthur.1 INTRODUCTION Digital media enable multiple forms of end user creativity inhabit such digital media environments. For example, ownership rights to digital artifacts developed

  2. Digital Technology and Culture Program

    E-Print Network [OSTI]

    Collins, Gary S.

    and articulate an understanding of the way digital media and information function and circulate in multiple perspective in order to understand the global changes brought about by digital media. · Effectively communicate through writing and speech why and how digital media texts make meaning. Student Club The Digital

  3. Electronic digital materials

    E-Print Network [OSTI]

    Langford, William Kai

    2014-01-01T23:59:59.000Z

    Digital materials are constructions assembled from a small number of types of discrete building blocks; they represent a new way of building functional, multi-material, three-dimensional structures. In this thesis, I focus ...

  4. analysing laser-scanned digital: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    in the context of their 3D sedimentary facies, unknown authors 24 Image Forensics of Digital Cameras by Analysing Image Variations using Statistical Process Control Physics...

  5. High-speed digital modulation of ultralow threshold (<1 mA) GaAs single quantum well lasers without bias

    SciTech Connect (OSTI)

    Lau, K.Y.; Bar-Chaim, N.; Derry, P.L.; Yariv, A.

    1987-07-13T23:59:59.000Z

    GaAlAs buried heterostructure lasers with submilliampere threshold current fabricated from single quantum well wafers can be driven directly with logic level signals without any current bias. The switch-on delay was measured to be <50 ps and no relaxation oscillation ringing was observed. These lasers permit fully o-smcapsn-smcapsreverse arrow-smcapso-smcapsf-smcapsf-smcaps multigigabit digital switching while at the same time obviating the need for bias monitoring and feedback control.

  6. Function library programming to support B89 evaluation of Sheffield Apollo RS50 DCC (Direct Computer Control) CMM (Coordinate Measuring Machine)

    SciTech Connect (OSTI)

    Frank, R.N.

    1990-02-28T23:59:59.000Z

    The Inspection Shop at Lawrence Livermore Lab recently purchased a Sheffield Apollo RS50 Direct Computer Control Coordinate Measuring Machine. The performance of the machine was specified to conform to B89 standard which relies heavily upon using the measuring machine in its intended manner to verify its accuracy (rather than parametric tests). Although it would be possible to use the interactive measurement system to perform these tasks, a more thorough and efficient job can be done by creating Function Library programs for certain tasks which integrate Hewlett-Packard Basic 5.0 language and calls to proprietary analysis and machine control routines. This combination provides efficient use of the measuring machine with a minimum of keyboard input plus an analysis of the data with respect to the B89 Standard rather than a CMM analysis which would require subsequent interpretation. This paper discusses some characteristics of the Sheffield machine control and analysis software and my use of H-P Basic language to create automated measurement programs to support the B89 performance evaluation of the CMM. 1 ref.

  7. Feed-forward digital phase and amplitude correction system

    DOE Patents [OSTI]

    Yu, D.U.L.; Conway, P.H.

    1994-11-15T23:59:59.000Z

    Phase and amplitude modifications in repeatable RF pulses at the output of a high power pulsed microwave amplifier are made utilizing a digital feed-forward correction system. A controlled amount of the output power is coupled to a correction system for processing of phase and amplitude information. The correction system comprises circuitry to compare the detected phase and amplitude with the desired phase and amplitude, respectively, and a digitally programmable phase shifter and attenuator and digital logic circuitry to control the phase shifter and attenuator. The phase and amplitude of subsequent are modified by output signals from the correction system. 11 figs.

  8. Evaluation of waveform digitizer systems and components in accordance with IEEE waveform digitizer standards

    SciTech Connect (OSTI)

    Green, P.J.

    1989-01-01T23:59:59.000Z

    Our division is charged with instrumentation development in support of underground testing. We find it necessary to be able to evaluate the performance of waveform digitizing systems with sampling rates from a few kilohertz to more than a gigahertz. We have been developing an integrated system which can provide quantitative results on the performance of systems and subsystems. Here we describe a system which is controlled by a Microvax II with instrumentation control through the IEEE-488 buss. The evaluation procedures are aimed at being consistent with a new Trial Waveform Digitizer Standard generated by the Waveform Measurements and Analysis committee appointed by the Instrumentation and Measurement Society of IEEE. This standard has been recently accepted by the IEEE and will be published in the next few months. Attention is given to the accurate measurement of effective-bit performance and differential nonlinearity of waveform digitizers. 3 refs., 14 figs.

  9. Digital Actuator Technology

    SciTech Connect (OSTI)

    Ken Thomas; Ted Quinn; Jerry Mauck; Richard Bockhorst

    2014-09-01T23:59:59.000Z

    There are significant developments underway in new types of actuators for power plant active components. Many of these make use of digital technology to provide a wide array of benefits in performance of the actuators and in reduced burden to maintain them. These new product offerings have gained considerable acceptance in use in process plants. In addition, they have been used in conventional power generation very successfully. This technology has been proven to deliver the benefits promised and substantiate the claims of improved performance. The nuclear industry has been reluctant to incorporate digital actuator technology into nuclear plant designs due to concerns due to a number of concerns. These could be summarized as cost, regulatory uncertainty, and a certain comfort factor with legacy analog technology. The replacement opportunity for these types of components represents a decision point for whether to invest in more modern technology that would provide superior operational and maintenance benefits. Yet, the application of digital technology has been problematic for the nuclear industry, due to qualification and regulatory issues. With some notable exceptions, the result has been a continuing reluctance to undertake the risks and uncertainties of implementing digital actuator technology when replacement opportunities present themselves. Rather, utilities would typically prefer to accept the performance limitations of the legacy analog actuator technologies to avoid impacts to project costs and schedules. The purpose of this report is to demonstrate that the benefits of digital actuator technology can be significant in terms of plant performance and that it is worthwhile to address the barriers currently holding back the widespread development and use of this technology. It addresses two important objectives in pursuit of the beneficial use of digital actuator technology for nuclear power plants: 1. To demonstrate the benefits of digital actuator technology over legacy analog sensor technology in both quantitative and qualitative ways. 2. To recognize and address the added difficulty of digital technology qualification, especially in regard to software common cause failure (SCCF), that is introduced by the use of digital actuator technology.

  10. The Analytical Sciences Digital Library (ASDL)

    E-Print Network [OSTI]

    Larive, Cynthia K.

    2009-01-01T23:59:59.000Z

    Analytical Sciences Digital Library (http://www.asdlib.org).Analytical Sciences Digital Library (ASDL) Cynthia K. LariveAnalytical Sciences Digital Library (ASDL) is a collection

  11. Language and Learning in the Digital Age

    E-Print Network [OSTI]

    Rama, Paul S.

    2012-01-01T23:59:59.000Z

    and implications of digital media. Parallels and comparisonsand writing), and digital media, and how these latter twoshaped, this time by digital media. The introduction lays

  12. Digital optical conversion module

    DOE Patents [OSTI]

    Kotter, D.K.; Rankin, R.A.

    1988-07-19T23:59:59.000Z

    A digital optical conversion module used to convert an analog signal to a computer compatible digital signal including a voltage-to-frequency converter, frequency offset response circuitry, and an electrical-to-optical converter. Also used in conjunction with the digital optical conversion module is an optical link and an interface at the computer for converting the optical signal back to an electrical signal. Suitable for use in hostile environments having high levels of electromagnetic interference, the conversion module retains high resolution of the analog signal while eliminating the potential for errors due to noise and interference. The module can be used to link analog output scientific equipment such as an electrometer used with a mass spectrometer to a computer. 2 figs.

  13. Undergraduate reactor control experiment

    SciTech Connect (OSTI)

    Edwards, R.M.; Power, M.A.; Bryan, M. (Pennsylvania State Univ., University Park (United States))

    1992-01-01T23:59:59.000Z

    A sequence of reactor and related experiments has been a central element of a senior-level laboratory course at Pennsylvania State University (Penn State) for more than 20 yr. A new experiment has been developed where the students program and operate a computer controller that manipulates the speed of a secondary control rod to regulate TRIGA reactor power. Elementary feedback control theory is introduced to explain the experiment, which emphasizes the nonlinear aspect of reactor control where power level changes are equivalent to a change in control loop gain. Digital control of nuclear reactors has become more visible at Penn State with the replacement of the original analog-based TRIGA reactor control console with a modern computer-based digital control console. Several TRIGA reactor dynamics experiments, which comprise half of the three-credit laboratory course, lead to the control experiment finale: (a) digital simulation, (b) control rod calibration, (c) reactor pulsing, (d) reactivity oscillator, and (e) reactor noise.

  14. Pitfalls of digital maps

    SciTech Connect (OSTI)

    Brewer, B.B.

    1986-05-01T23:59:59.000Z

    Computers allow us to combine maps from different sources and different scales more easily. In the past, these variations had to be ignored or only partly solved. With the advent of computers and increased digital maps, these inconsistencies become glaring errors that should no longer be ignored. The final success of a project largely lies on the accuracy and validity of its maps. This paper discusses problems and solutions associated with trying to tie maps together. The paper concentrates on the importance of understanding map projections and the problems involved in adding new maps to existing digital maps.

  15. Alexandria Digital Library Project The ADEPT Digital Library

    E-Print Network [OSTI]

    Janée, Greg

    Alexandria Digital Library Project The ADEPT Digital Library Architecture Greg Janée gjanee@alexandria.ucsb.edu James Frew frew@bren.ucsb.edu #12;Alexandria Digital Library Project 2Greg Janée, James Frew · JCDL 2002-level metadata: buckets constraint types metadata mapping standard buckets Collection discovery Current

  16. Alexandria Digital Earth ProtoType The Alexandria Digital Earth

    E-Print Network [OSTI]

    Janée, Greg

    Alexandria Digital Earth ProtoType The Alexandria Digital Earth Prototype System Terence Smith Greg Janée James Frew Anita Coleman #12;Alexandria Digital Earth ProtoType 2Smith et al. / JCDL 2001 / 2x Earth ProtoType 3Smith et al. / JCDL 2001 / 2x-Jun-2001 Core System (inherited from ADL) Components

  17. Additive assembly of digital materials

    E-Print Network [OSTI]

    Ward, Jonathan (Jonathan Daniel)

    2010-01-01T23:59:59.000Z

    This thesis develops the use of additive assembly of press-fit digital materials as a new rapid-prototyping process. Digital materials consist of a finite set of parts that have discrete connections and occupy discrete ...

  18. Alexandria Digital Library Project Content Access Characterization

    E-Print Network [OSTI]

    Janée, Greg

    Alexandria Digital Library Project Content Access Characterization in Digital Libraries Greg Janée · James Frew · David Valentine University of California, Santa Barbara #12;Alexandria Digital Library environments e.g., GIS #12;Alexandria Digital Library Project Janée, Frew, Valentine · Content Access

  19. DCC Briefing Paper: What is digital curation? 

    E-Print Network [OSTI]

    Abbott, Daisy

    2008-04-02T23:59:59.000Z

    new digital data, scientists, researchers, and scholars have begun to rely on digital content created by others. These data are at risk from technological obsolescence and from the inherent fragility of digital media. Digital curation is the management...

  20. Digital Camera Find out which

    E-Print Network [OSTI]

    Rogers, John A.

    Sony Cyber-shot Cameras Official Site: Sony Cyber-shot Digital Cameras. Shop Now! Photoelectric Sensors

  1. DIGITAL Visual Fortran Programmer's Guide

    E-Print Network [OSTI]

    accelerator, the LHC, Large Hadron Collider. AlphaGeneration, DEC, DEC Fortran, DIGITAL, OpenVMS, VAX, VAX

  2. Digital Business RESEARCH BRIEF

    E-Print Network [OSTI]

    -enabled slack", that explains how exactly IT can lead to payoff in terms of information worker productivity on Information Worker Productivity Sumit Bhansali, PhD, MIT Sloan School of Management Erik Brynjolfsson of digitizing work on information workers' time- use and performance at a large insurance firm. We were able

  3. The Digital Interactive Video

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    The Digital Interactive Video Exploration and Reflection (Diver) system lets users create virtual pathways through existing video content using a virtual camera and an annotation window for commentary repurposing, and discussion. W ith the inexorable growth of low-cost consumer video elec- tronics

  4. Digital Media Design Students Constitution

    E-Print Network [OSTI]

    Jones, Michelle

    Digital Media Design Students Constitution ARTICLE I: ORGANIZATION'S NAME AND PURPOSE Section 1. Name The name of this organization is Digital Media Design Students (DMDS). Section 2: Purpose A. To promote, enhance and further develop educational and social achievements and interests in digital media. B

  5. Developments in Digital Cinema Projection

    E-Print Network [OSTI]

    Zanibbi, Richard

    Developments in Digital Cinema Projection Barry Silverstein Projection Technology Manager Entertainment Imaging, Eastman Kodak 4pm, Wed., Nov. 1, 2006 Auditorium of the Center for Imaging Science George and color, the switch to Digital Technology. The Digital Cinema conversion process is just beginning. It has

  6. Digital Intermediate Frequency Receiver Module For Use In Airborne Sar Applications

    DOE Patents [OSTI]

    Tise, Bertice L. (Albuquerque, NM); Dubbert, Dale F. (Cedar Crest, NM)

    2005-03-08T23:59:59.000Z

    A digital IF receiver (DRX) module directly compatible with advanced radar systems such as synthetic aperture radar (SAR) systems. The DRX can combine a 1 G-Sample/sec 8-bit ADC with high-speed digital signal processor, such as high gate-count FPGA technology or ASICs to realize a wideband IF receiver. DSP operations implemented in the DRX can include quadrature demodulation and multi-rate, variable-bandwidth IF filtering. Pulse-to-pulse (Doppler domain) filtering can also be implemented in the form of a presummer (accumulator) and an azimuth prefilter. An out of band noise source can be employed to provide a dither signal to the ADC, and later be removed by digital signal processing. Both the range and Doppler domain filtering operations can be implemented using a unique pane architecture which allows on-the-fly selection of the filter decimation factor, and hence, the filter bandwidth. The DRX module can include a standard VME-64 interface for control, status, and programming. An interface can provide phase history data to the real-time image formation processors. A third front-panel data port (FPDP) interface can send wide bandwidth, raw phase histories to a real-time phase history recorder for ground processing.

  7. A Hybrid Network IDS for Protective Digital Relays in the Power Transmission Grid

    E-Print Network [OSTI]

    Koutsandria, Georgia; Muthukumar, Vishak; Parvania, Masood; Peisert, Sean; McParland, Chuck; Scaglione, Anna

    2014-01-01T23:59:59.000Z

    the digital relay that implements the protection mechanism.protection control algorithm is executed and, based on the result, the master controller sends “write” queries to the slave relay

  8. Three phase AC motor controller

    DOE Patents [OSTI]

    Vuckovich, Michael (Elizabeth, PA); Wright, Maynard K. (Bethel Park, PA); Burkett, John P. (South Huntington Township, Westmoreland County, PA)

    1984-03-20T23:59:59.000Z

    A motor controller for a three phase AC motor (10) which is adapted to operate bidirectionally from signals received either from a computer (30) or a manual control (32). The controller is comprised of digital logic circuit means which implement a forward and reverse command signal channel (27, 29) for the application of power through the forward and reverse power switching relays (16, 18, 20, 22). The digital logic elements are cross coupled to prevent activation of both channels simultaneously and each includes a plugging circuit (65, 67) for stopping the motor upon the removal of control signal applied to one of the two channels (27, 29) for a direction of rotation desired. Each plugging circuit (65, 67) includes a one-shot pulse signal generator (88, 102) which outputs a single pulse signal of predetermined pulsewidth which is adapted to inhibit further operation of the application of power in the channel which is being activated and to apply a reversal command signal to the other channel which provides a reversed phase application of power to the motor for a period defined by the pulse-width output of the one-shot signal generator to plug the motor (10) which will then be inoperative until another rotational command signal is applied to either of the two channels.

  9. Arnold Schwarzenegger A DIGITAL CONTROL SYSTEM FOR

    E-Print Network [OSTI]

    Research (PIER) California Energy Commission Paul Roggensack Contract Manager Michael Lozano Program Area on the following RD&D program areas: · Buildings End-Use Energy Efficiency · Energy Innovations Small Grants Prepared For: California Energy Commission Public Interest Energy Research Program PIERFINALPROJECTREPORT

  10. Arnold Schwarzenegger A DIGITAL CONTROL SYSTEM FOR

    E-Print Network [OSTI]

    (PIER) Program California Energy Commission Paul Roggensack Contract Manager Michael Lozano Program Area Lead Industrial/Agricultural/Water End-Use Energy Efficiency Virginia Lew Office Manager Energy-Time Transfer Efficiency Monitoring for Wastewater Aeration Systems, Shao-Yuan Leu, Diego Rosso, Pan Jiang, Lory

  11. A Knowledge Based Digital Control Flow Synthesizer

    E-Print Network [OSTI]

    Fernando, M. A. Susith Rohana

    1987-01-01T23:59:59.000Z

    applications are characterized by symbolic pro- cessing, incomplete problem solving knowledge and open systems. Symbolic processing contrast with numerical processing where intensive nu- rnerical comput, ations are involved. The information to be dealt... programming is one of the four popular programming paradigms available in the computer science community. In contrast with more common pro- cedural programming paradigm, programs are not primarily partitioned into pro- cedures and separate data. Rather, a...

  12. A Automated Tool for Supporting FMEAs of Digital Systems

    SciTech Connect (OSTI)

    Yue,M.; Chu, T.-L.; Martinez-Guridi, G.; Lehner, J.

    2008-09-07T23:59:59.000Z

    Although designs of digital systems can be very different from each other, they typically use many of the same types of generic digital components. Determining the impacts of the failure modes of these generic components on a digital system can be used to support development of a reliability model of the system. A novel approach was proposed for such a purpose by decomposing the system into a level of the generic digital components and propagating failure modes to the system level, which generally is time-consuming and difficult to implement. To overcome the associated issues of implementing the proposed FMEA approach, an automated tool for a digital feedwater control system (DFWCS) has been developed in this study. The automated FMEA tool is in nature a simulation platform developed by using or recreating the original source code of the different module software interfaced by input and output variables that represent physical signals exchanged between modules, the system, and the controlled process. For any given failure mode, its impacts on associated signals are determined first and the variables that correspond to these signals are modified accordingly by the simulation. Criteria are also developed, as part of the simulation platform, to determine whether the system has lost its automatic control function, which is defined as a system failure in this study. The conceptual development of the automated FMEA support tool can be generalized and applied to support FMEAs for reliability assessment of complex digital systems.

  13. Metrological digital audio reconstruction

    DOE Patents [OSTI]

    Fadeyev; Vitaliy (Berkeley, CA), Haber; Carl (Berkeley, CA)

    2004-02-19T23:59:59.000Z

    Audio information stored in the undulations of grooves in a medium such as a phonograph record may be reconstructed, with little or no contact, by measuring the groove shape using precision metrology methods coupled with digital image processing and numerical analysis. The effects of damage, wear, and contamination may be compensated, in many cases, through image processing and analysis methods. The speed and data handling capacity of available computing hardware make this approach practical. Two examples used a general purpose optical metrology system to study a 50 year old 78 r.p.m. phonograph record and a commercial confocal scanning probe to study a 1920's celluloid Edison cylinder. Comparisons are presented with stylus playback of the samples and with a digitally re-mastered version of an original magnetic recording. There is also a more extensive implementation of this approach, with dedicated hardware and software.

  14. A digital CDS technique and the performance testing

    E-Print Network [OSTI]

    Xiao-Yan Liu; Jing-Bin Lu; Yan-Ji Yang; Bo Lu; Yu-Sa Wang; Yu-Peng Xu; Wei-Wei Cui; Wei Li; Mao-Shun Li; Juan Wang; Da-Wei Han; Tian-Xiang Chen; Jia Huo; Wei Hu; Yi Zhang; Yue Zhu; Zi-Liang Zhang; Guo-He Yin; Yu Wang; Zhong-Yi Zhao; Yan-Hong Fu; Ya Zhang; Ke-Yan Ma; Yong Chen

    2014-10-09T23:59:59.000Z

    Readout noise is a critical parameter for characterizing the performance of charge-coupled devices (CCDs), which can be greatly reduced by the correlated double sampling (CDS) circuit. However, conventional CDS circuit inevitably introduces new noises since it consists of several active analog components such as operational amplifiers. This paper proposes a digital CDS circuit technique, which transforms the pre-amplified CCD signal into a train of digital presentations by a high-speed data acquisition card directly without the noisy CDS circuit first, then implement the digital CDS algorithm through numerical method. The readout noise of 3.3 e$^{-}$ and the energy resolution of 121 eV@5.9keV can be achieved via the digital CDS technique.

  15. The National Digital Stewardship Alliance Charter: Enabling Collaboration to Achieve National Digital Preservation

    E-Print Network [OSTI]

    Anderson, Martha; Gallinger, Michelle; Potter, Abigail

    2009-01-01T23:59:59.000Z

    made in creating digital library services and content. ThePersistent Digital Archives & Library System. Presented atchallenge of digital preservation, the Library of Congress

  16. The National Digital Stewardship Alliance Charter: Enabling Collaboration to Achieve National Digital Preservation

    E-Print Network [OSTI]

    Anderson, Martha; Gallinger, Michelle; Potter, Abigail

    2009-01-01T23:59:59.000Z

    expanding universe of digital media. Over the past 10 years,but the emergence of new digital media types continue totechnical and media landscape of digital preservation. The

  17. Methods of Digital Video Microscopy for Colloidal Studies John C. Crocker and David G. Grier

    E-Print Network [OSTI]

    Grier, David

    Methods of Digital Video Microscopy for Colloidal Studies John C. Crocker and David G. Grier digitized video microscope images of colloidal suspensions. In a typical application, these direct imaging information from a sequence of video images into single­particle trajectories makes pos­ sible measurements

  18. Methods of Digital Video Microscopy for Colloidal Studies John C. Crocker and David G. Grier

    E-Print Network [OSTI]

    Grier, David

    Methods of Digital Video Microscopy for Colloidal Studies John C. Crocker and David G. Grier digitized video microscope images of colloidal suspensions. In a typical application, these direct imaging information from a sequence of video images into single-particle trajectories makes pos- sible measurements

  19. Methods of Digital Video Microscopy for Colloidal Studies John C. Crocker and David G. Grier

    E-Print Network [OSTI]

    Grier, David

    Methods of Digital Video Microscopy for Colloidal Studies John C. Crocker and David G. Grier digitized video microscope im­ ages of colloidal suspensions. In a typical application, these direct imaging information from a sequence of video images into single­ particle trajectories makes possible measurements

  20. Environmental Digital Library Project: Playa Lakes and the Ogallala Aquifer

    E-Print Network [OSTI]

    Johnson, Bill; Oliver, Marina

    1999-01-01T23:59:59.000Z

    Building the Sci/Tech Digital Library, part 2: Filling the1995) Copyright and Digital Libraries. Communications of theand Practice of Digital Libraries, Digital Libraries '94 in

  1. Review of Methods Related to Assessing Human Performance in Nuclear Power Plant Control Room Simulations

    SciTech Connect (OSTI)

    Katya L Le Blanc; Ronald L Boring; David I Gertman

    2001-11-01T23:59:59.000Z

    With the increased use of digital systems in Nuclear Power Plant (NPP) control rooms comes a need to thoroughly understand the human performance issues associated with digital systems. A common way to evaluate human performance is to test operators and crews in NPP control room simulators. However, it is often challenging to characterize human performance in meaningful ways when measuring performance in NPP control room simulations. A review of the literature in NPP simulator studies reveals a variety of ways to measure human performance in NPP control room simulations including direct observation, automated computer logging, recordings from physiological equipment, self-report techniques, protocol analysis and structured debriefs, and application of model-based evaluation. These methods and the particular measures used are summarized and evaluated.

  2. Digital Preservation Award

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign: Potential ApplicationYu,Energy InnovationDigital

  3. Federal Digital Strategy | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluating A PotentialJumpGerman AerospaceEfficiency IncentivesCoop,Digital Strategy

  4. Automated Design of Pin-Constrained Digital Microfluidic Biochips Under

    E-Print Network [OSTI]

    Chakrabarty, Krishnendu

    14 Automated Design of Pin-Constrained Digital Microfluidic Biochips Under Droplet Corporation and KRISHNENDU CHAKRABARTY Duke University Microfluidics-based biochips, also referred to as lab on a microfluidic array. In contrast to the direct-addressing scheme that has been studied thus far

  5. Directives System

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1998-01-30T23:59:59.000Z

    The Department of Energy (DOE) Directives System is the means by which DOE policies, requirements, and responsibilities are developed and communicated throughout the Department. Directives are used to inform, direct, and guide employees in the performance of their jobs, and to enable employees to work effectively within the Department and with agencies, contractors, and the public. Cancels: DOE O 251.1, DOE M 251.1-1

  6. Network Television and the Digital Threat

    E-Print Network [OSTI]

    Lapan, Lisa

    2009-01-01T23:59:59.000Z

    NETWORK TV AND THE DIGITAL THREAT tertainment are availableNETWORK TV AND THE DIGITAL THREAT luring users to watch the91 Ryan Nakashima, Digital Threat Prompts Movie Industry

  7. Digital Publishing Procedures Category: Information Management

    E-Print Network [OSTI]

    (WA) Policy Manager Vice President Corporate Relations and Development Contact Director, Digital Media1 Digital Publishing Procedures Category: Information Management 1. LEGISLATION a framework for the publishing of the University's digital communications, including but not limited to all

  8. Designing a Born-Digital Archive

    E-Print Network [OSTI]

    Light, Michelle

    2010-01-01T23:59:59.000Z

    sometimes mysterious digital media we find in boxes 15 yearspossibly altering code. Digital media is fragile; its shelfthe user and the digital media. ” For those who won't get to

  9. Broadcast Electrode-Addressing for Pin-Constrained Multi-Functional Digital Microfluidic Biochips

    E-Print Network [OSTI]

    Chakrabarty, Krishnendu

    Broadcast Electrode-Addressing for Pin-Constrained Multi-Functional Digital Microfluidic Biochips, Durham, NC 27708, USA {tx, krish}@ee.duke.edu Abstract Recent advances in digital microfluidics have. The number of independent input pins used to control the electrodes in such microfluidic "biochips

  10. Data Integration and Information Exchange for Enhanced Control and Protection of Power Systems

    E-Print Network [OSTI]

    that the needs are served by independent instrumentation and controller infrastructures. Protective relays 1): · Digital protective relays (DPRs) · Digital fault recorders (DFRData Integration and Information Exchange for Enhanced Control and Protection of Power Systems

  11. SciTech Connect: Digital Actuator Technology

    Office of Scientific and Technical Information (OSTI)

    Digital Actuator Technology Citation Details In-Document Search Title: Digital Actuator Technology There are significant developments underway in new types of actuators for power...

  12. Directives Help

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    All DOE directives are available through this site. While it may seem overwhelming, given the number of documents, we have provided a number of ways in which you may get to the information you need.

  13. Direct from CDC's Environmental

    E-Print Network [OSTI]

    Direct from CDC's Environmental Health Services Branch Daneen Farrow Collier, M.S.P.H. Editor's note: NEHA strives to pro vide up-to-date and relevant informa tion on environmental health the Environmental Health Services Branch (EHSB) of the Centers for Disease Control and Pre vention (CDC) in every

  14. DCC Digital Curation Manual: Preservation Strategies for Digital Libraries 

    E-Print Network [OSTI]

    Holdsworth, David

    2007-11-01T23:59:59.000Z

    Ensuring that digital data remain accessible and reusable over time requires the implementation of proactive, scalable and sustainable preservation strategies. To be of greatest effect, preservation issues must be ...

  15. What Does Digital Straightness Tell About Digital Convexity ?

    E-Print Network [OSTI]

    Sivignon, Isabelle

    raised in [EDR04]: how far one can decide whether a part of a digital boundary is convex either for local estimators [dVLF07] or for faithful polygonalizations [EDR04,DRDR06]. In this paper

  16. High performance control of harmonic instability from HVDC link system

    SciTech Connect (OSTI)

    Min, W.K.; Yoo, M.H. [Korea Electric Power Research Inst., Taejeon (Korea, Republic of)

    1995-12-31T23:59:59.000Z

    This paper investigates the usefulness of novel control method for HVDC link system which suffers from severe condition of low order harmonic. This control scheme is used the feedforward control method which is directly controlled dc current at dc link system. The studies of this paper are aimed to improving the dynamic response of HVdc link system in disturbances such as faults. To achieve those objectives, digital time domain simulations are employed by the electro magnetic transient program for dc system (EMTDC). This method results in stable recovery from faults at both rectifier and inverter terminal busbars for a HVdc system that is inherently unstable. It has been found to be robust and control performance has been enhanced.

  17. A digitizer based compact digital spectrometer for ion beam analysis using field programmable gate arrays and various energy algorithms

    SciTech Connect (OSTI)

    Jäger, Markus [Faculty of Mathematics and Computer Science, University of Leipzig, PF 100920, 04009 Leipzig (Germany)] [Faculty of Mathematics and Computer Science, University of Leipzig, PF 100920, 04009 Leipzig (Germany); Reinert, Tilo [Department of Physics, University of North Texas, 1155 Union Circle, Denton, Texas 76203 (United States)] [Department of Physics, University of North Texas, 1155 Union Circle, Denton, Texas 76203 (United States)

    2013-08-15T23:59:59.000Z

    We report on the implementation of a compact multi-detector fully digital spectrometer and data acquisition system at a nuclear microprobe for ion beam analysis and imaging. The spectrometer design allows for system scalability with no restriction on the number of detectors. It consists of four-channel high-speed digitizer modules for detector signal acquisition and one low-speed digital-to-analog converter (DAC) module with two DAC channels and additional general purpose inputs/outputs to control ion beam scanning and data acquisition. Each digitizer module of the spectrometer provides its own Field Programmable Gate Array (FPGA) as digital signal processing unit to analyze detector signals as well as to synchronize the ion beam position in hard real-time. With the customized FPGA designs for all modules, all calculation intensive tasks are executed inside the modules, which reduces significantly the data stream to and CPU load on the control computer. To achieve an optimal energy resolution for all detector/preamplifier pulse shape characteristics, a user-definable infinite impulse response filter with high throughput for energy determination was implemented. The new spectrometer has an online data analysis feature, a compact size, and is able to process any type of detector signals such as particle induced x-ray emission, Rutherford backscattering spectrometry, or scanning transmission ion microscopy.

  18. Group Blind Digital Signatures: Theory and Applications

    E-Print Network [OSTI]

    Goldwasser, Shafi

    Group Blind Digital Signatures: Theory and Applications by Zul kar Amin Ramzan Submitted Committee on Graduate Students #12;Group Blind Digital Signatures: Theory and Applications by Zul kar Amin Blind Digital Signature. This construct combines the already existing notions of a Group Digital

  19. Chapter XLIII USGS Digital Libraries for

    E-Print Network [OSTI]

    Chapter XLIII USGS Digital Libraries for Coastal and Marine Science Frances L. Lightsom U three related digital libraries providing access to topical and georeferenced information for coastal Digital Library and Coastal Change Hazards Digital Library. These three members of the MRIB family run

  20. THE UBIQUITOUS DIGITAL TREE PHILIPPE FLAJOLET

    E-Print Network [OSTI]

    Flajolet, Philippe

    - bility theory--the digital tree process. Because of space-time limitations, this text, an invited lectureTHE UBIQUITOUS DIGITAL TREE PHILIPPE FLAJOLET Abstract. The digital tree also known as trie made is a recursive partitioning based on successive bits or digits of data items. Under various guises, it has

  1. DESIGN AND IMPLEMENTATION OF DIGITAL LIBRARIES

    E-Print Network [OSTI]

    Furht, Borko

    Chapter 18 DESIGN AND IMPLEMENTATION OF DIGITAL LIBRARIES Xiuqi Li and Borko Furht Abstract As the Internet and the World Wide Web expanded so fast, digital libraries has become a very hot topic. Since 1992 of these studies. We first discuss designing digital libraries, including definition of digital libraries

  2. The Digital Library Shell Yael Dubinsky

    E-Print Network [OSTI]

    Yehudai, Amiram

    The Digital Library Shell Yael Dubinsky University of Rome "La Sapienza" Department of Computer Libraries The Digital Library (DL) Shell The project of development the DL shell Demonstration Summary and future work #12;3 Agenda Digital Libraries The Digital Library (DL) Shell The project of development

  3. Digital compositing with traditional artwork 

    E-Print Network [OSTI]

    Stanley, Michael Leighton

    2005-11-01T23:59:59.000Z

    This thesis presents a general method and guidelines for compositing digital characters into traditional artwork by matching a character to the perspective, lighting, style, and complexity of the particular work of art. ...

  4. Digital compositing with traditional artwork

    E-Print Network [OSTI]

    Stanley, Michael Leighton

    2005-11-01T23:59:59.000Z

    This thesis presents a general method and guidelines for compositing digital characters into traditional artwork by matching a character to the perspective, lighting, style, and complexity of the particular work of art. The primary goal...

  5. Roadmap: Digital Sciences Digital Systems Analysis Bachelor of Science [DS-BS-DS-DSA

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Digital Sciences ­ Digital Systems Analysis ­ Bachelor of Science [DS-BS-DS-DSA] School of Digital Sciences Catalog Year: 2012-2013 Page 1 of 3 | Last Updated: 16-Apr-12/LNHD This roadmap (lower or upper division) 6 #12;Roadmap: Digital Sciences ­ Digital Systems Analysis ­ Bachelor

  6. Digital library as a controversy Running head: DIGITAL LIBRARY AS A CONTROVERSY

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Digital library as a controversy Running head: DIGITAL LIBRARY AS A CONTROVERSY Digital library nouvelle 1 hal-00718385,version1-16Jul2012 Author manuscript, published in "Digital library as a controversy: Gallica vs Google, Dubrovnik : Croatia (2009)" #12;Digital library as a controversy Abstract

  7. Digital-data receiver synchronization

    DOE Patents [OSTI]

    Smith, Stephen F.; Turner, Gary W.

    2005-08-02T23:59:59.000Z

    Digital-data receiver synchronization is provided with composite phase-frequency detectors, mutually cross-connected comparison feedback or both to provide robust reception of digital data signals. A single master clock can be used to provide frequency signals. Advantages can include fast lock-up time in moderately to severely noisy conditions, greater tolerance to noise and jitter when locked, and improved tolerance to clock asymmetries.

  8. Digital quantum simulators in a scalable architecture of hybrid spin-photon qubits

    E-Print Network [OSTI]

    Alessandro Chiesa; Paolo Santini; Dario Gerace; James Raftery; Andrew A. Houck; Stefano Carretta

    2015-04-22T23:59:59.000Z

    Resolving quantum many-body problems represents one of the greatest challenges in physics and physical chemistry, due to the prohibitively large computational resources that would be required by using classical computers. A solution has been foreseen by directly simulating the time evolution through sequences of quantum gates applied to arrays of qubits, i.e. by implementing a digital quantum simulator. Superconducting circuits and resonators are emerging as an extremely-promising platform for quantum computation architectures, but a digital quantum simulator proposal that is straightforwardly scalable, universal, and realizable with state-of-the-art technology is presently lacking. Here we propose a viable scheme to implement a universal quantum simulator with hybrid spin-photon qubits in an array of superconducting resonators, which is intrinsically scalable and allows for local control. As representative examples we consider the transverse-field Ising model, a spin-1 Hamiltonian, and the two-dimensional Hubbard model; for these, we numerically simulate the scheme by including the main sources of decoherence. In addition, we show how to circumvent the potentially harmful effects of inhomogeneous broadening of the spin systems.

  9. Directing the Fall of Darwin’s “Grain in the Balance”: Manipulation of Hydraulic Flushing as a Potential Control of Phytoplankton Dynamics

    E-Print Network [OSTI]

    Roelke, Daniel; Augustine, Sarah; Buyukates, Yesim

    lakes of the Yellowstone ecosystem using resource theory. Limnology and Oceanography 41:1052-1062. Kirk, J. T. O. 1994. Light and Photosynthesis in Aquatic Ecosystems. Cambridge University Press, Cambridge. Koch, A. L. 1974. Competitive coexistence of 2... Sciences Department, Texas A&M University December 2003 This research was supported in part by The National Science Foundation Research for Undergraduates Program The Texas A&M Sea Grant College Program and the Texas Water Resources Institute 2 Directing...

  10. A hierarchal multilevel microprocessor control system

    E-Print Network [OSTI]

    Teverbaugh, Larry D

    1979-01-01T23:59:59.000Z

    architectural configurations of distributed systems are examined for their usefulness in process control. An implementation of a distributed control system was undertaken in an effort to investigate the problems associated with multiprocessor architectures. A... OF THE DEVELOPMENT AND APPLICATION OF MICROPROCESSOR TECHNOLOGY. PROCESS CONTROL AND THE COMPUTER Page Process Control Fundamentals Digital Control Systems. Centralized Computing. Distributed Systems. Distributed Control System Architecture. Star...

  11. Microcomputers in Process Control 

    E-Print Network [OSTI]

    Vinson, D. R.; Chatterjee, N.

    1986-01-01T23:59:59.000Z

    demand control, pipeline pressure control, product rate changes, 5tart-up and shutdown optimization, and time-of-day production rate control. The ultimate objective is for operators to specify a minimum of required parameters and let the computer..., while the computer system is divided into digital/analog conversion gear and the computer system itself. In general, there are four major types of DOC computer compatible baseline control system used today: 1. Pneumatic transmitters, analog...

  12. Dislocation and morphology control during molecular-beam epitaxy of AlGaN/GaN heterostructures directly on sapphire substrates

    E-Print Network [OSTI]

    Manfra, Michael J.

    Dislocation and morphology control during molecular-beam epitaxy of AlGaN/GaN heterostructures-dimensional arrays Appl. Phys. Lett. 100, 203117 (2012) Partially filled intermediate band of Cr-doped GaN films Appl at telecommunication wavelengths J. Appl. Phys. 111, 093721 (2012) GaN epitaxy on Cu(110) by metal organic chemical

  13. Stepping motor controller

    DOE Patents [OSTI]

    Bourret, S.C.; Swansen, J.E.

    1982-07-02T23:59:59.000Z

    A stepping motor is microprocessor controlled by digital circuitry which monitors the output of a shaft encoder adjustably secured to the stepping motor and generates a subsequent stepping pulse only after the preceding step has occurred and a fixed delay has expired. The fixed delay is variable on a real-time basis to provide for smooth and controlled deceleration.

  14. Creating an EPICS Based Test Stand Development System for a BPM Digitizer of the Linac Coherent Light Source

    SciTech Connect (OSTI)

    Not Available

    2011-06-22T23:59:59.000Z

    The Linac Coherent Light Source (LCLS) is required to deliver a high quality electron beam for producing coherent X-rays. As a result, high resolution beam position monitoring is required. The Beam Position Monitor (BPM) digitizer acquires analog signals from the beam line and digitizes them to obtain beam position data. Although Matlab is currently being used to test the BPM digitizer?s functions and capability, the Controls Department at SLAC prefers to use Experimental Physics and Industrial Control Systems (EPICS). This paper discusses the transition of providing similar as well as enhanced functionalities, than those offered by Matlab, to test the digitizer. Altogether, the improved test stand development system can perform mathematical and statistical calculations with the waveform signals acquired from the digitizer and compute the fast Fourier transform (FFT) of the signals. Finally, logging of meaningful data into files has been added.

  15. A TEST TO DEMONSTRATE A DIGITAL WEB-BASED OILFIELD DATA COLLECTION SERVICE

    SciTech Connect (OSTI)

    Rochelle, J.

    2001-09-30T23:59:59.000Z

    The U.S. Department of Energy and HIS Energy tested a web-based field data collection service, FieldDIRECT, at NPR-3. FieldDIRECT provided a way to digitally collect oil and gas data from the field, transfer it quickly, accurately and securely via the Internet, and utilize it immediately to generate executive, operational and administrative reports.

  16. Apparatus and method for managing digital resources by passing digital resource tokens between queues

    DOE Patents [OSTI]

    Crawford, Henry J. (Berkeley, CA); Lindenstruth, Volker (El Cerrito, CA)

    1999-01-01T23:59:59.000Z

    A method of managing digital resources of a digital system includes the step of reserving token values for certain digital resources in the digital system. A selected token value in a free-buffer-queue is then matched to an incoming digital resource request. The selected token value is then moved to a valid-request-queue. The selected token is subsequently removed from the valid-request-queue to allow a digital agent in the digital system to process the incoming digital resource request associated with the selected token. Thereafter, the selected token is returned to the free-buffer-queue.

  17. Apparatus and method for managing digital resources by passing digital resource tokens between queues

    DOE Patents [OSTI]

    Crawford, H.J.; Lindenstruth, V.

    1999-06-29T23:59:59.000Z

    A method of managing digital resources of a digital system includes the step of reserving token values for certain digital resources in the digital system. A selected token value in a free-buffer-queue is then matched to an incoming digital resource request. The selected token value is then moved to a valid-request-queue. The selected token is subsequently removed from the valid-request-queue to allow a digital agent in the digital system to process the incoming digital resource request associated with the selected token. Thereafter, the selected token is returned to the free-buffer-queue. 6 figs.

  18. LIFE3: Predicting Long Term Digital Preservation Costs

    E-Print Network [OSTI]

    Wheatley, Paul; Hole, Brian

    2009-01-01T23:59:59.000Z

    dedicated Digital Preservation Team, the British Library hasthe Digital Preservation Team at the British Library isLibrary, which studied and compared both analogue and digital

  19. An Emergent Micro-Services Approach to Digital Curation Infrastructure

    E-Print Network [OSTI]

    Abrams, Stephen; Kunze, John; Loy, David

    2009-01-01T23:59:59.000Z

    Making of HathiTrust Digital Library. Archiving 2009 FinalLoy California Digital Library, University of California 415the California Digital Library UC Curation Center is re-

  20. Using Digital Images of the Zebra Finch Song System as

    E-Print Network [OSTI]

    2011-01-01T23:59:59.000Z

    barriers by creating a library of digital images of the birdcreating digital tools, including an image library of songlibrary, students not only repeat an Bird Song System Digital

  1. Center for Music Experiment: Creating a Digital Collection

    E-Print Network [OSTI]

    Garcia-Spitz, Cristela; Kesner, David; Reser, Greg

    2011-01-01T23:59:59.000Z

    available through the Digital Library Collections websiteBrad Westbrook • Digital Library Program: Robin Chandler,Stanonik, Huawei Weng • Digital Library Steering Committee:

  2. The Dartmouth Digital Library Program, Priorities, and Policies

    E-Print Network [OSTI]

    Myers, Lawrence C.

    The Dartmouth Digital Library Program, Priorities, and Policies #12;The Dartmouth Digital Library: Program, Priorities, and Policies 2 Librarian for Information Resources; Jennifer Kortfelt, Digital Library Technologies

  3. Digital Materiality: Preserving Access to Computers as Complete Environments

    E-Print Network [OSTI]

    2009-01-01T23:59:59.000Z

    engineering to digital libraries. MARBL’s 2006 acquisitionUniversity Libraries (EUL) emerging Born-Digital Archives (and Rare Book Library (MARBL) and from Digital Systems,

  4. Mass digitization and its impact on interlending and document supply

    E-Print Network [OSTI]

    Willett, Perry

    2009-01-01T23:59:59.000Z

    Microsoft, Joining Growing Digital-Library Effort, Will PayManager at the California Digital Library since 2008.the Head of the Digital Library Production Service at the

  5. Distributed Digital Preservation: Technical, Sustainability, and Organizational Developments

    E-Print Network [OSTI]

    Walters, Tyler; Bishoff, Liz; Gore, Emily B.; Jordan, Mark; Wilson, Thomas C

    2009-01-01T23:59:59.000Z

    Strategies for Sustaining Digital Libraries. (Atlanta: Emoryand the California Digital Library, has been the focus ofPersistent Digital Archives and Library System (PeDALS)

  6. From Point to Pixel: A Genealogy of Digital Aesthetics

    E-Print Network [OSTI]

    Hoy, Meredith Anne

    2010-01-01T23:59:59.000Z

    an Orphan? : Acquiring Digital Media through an Analogin Code: Interfaces With Digital Media. New York: Routledge,Painting and Digital Media Conclusion: Amalgamations: From

  7. analytical sciences digital: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Index 1 Roadmap: Digital Sciences Bachelor of Science School of Digital Sciences Computer Technologies and Information Sciences Websites Summary: Roadmap: Digital Sciences -...

  8. LIFE3: Predicting Long Term Digital Preservation Costs

    E-Print Network [OSTI]

    Wheatley, Paul; Hole, Brian

    2009-01-01T23:59:59.000Z

    Preservation Management of Digital Materials: The Handbook,management decision facing the BL Collection Care Department: the appropriateness of digital as a preservation medium for non digital materials.

  9. Method and apparatus for digitally based high speed x-ray spectrometer

    DOE Patents [OSTI]

    Warburton, William K. (1300 Mills St., Menlo Park, CA 94025); Hubbard, Bradley (Santa Cruz, CA)

    1997-01-01T23:59:59.000Z

    A high speed, digitally based, signal processing system which accepts input data from a detector-preamplifier and produces a spectral analysis of the x-rays illuminating the detector. The system achieves high throughputs at low cost by dividing the required digital processing steps between a "hardwired" processor implemented in combinatorial digital logic, which detects the presence of the x-ray signals in the digitized data stream and extracts filtered estimates of their amplitudes, and a programmable digital signal processing computer, which refines the filtered amplitude estimates and bins them to produce the desired spectral analysis. One set of algorithms allow this hybrid system to match the resolution of analog systems while operating at much higher data rates. A second set of algorithms implemented in the processor allow the system to be self calibrating as well. The same processor also handles the interface to an external control computer.

  10. Method and apparatus for digitally based high speed x-ray spectrometer

    DOE Patents [OSTI]

    Warburton, W.K.; Hubbard, B.

    1997-11-04T23:59:59.000Z

    A high speed, digitally based, signal processing system which accepts input data from a detector-preamplifier and produces a spectral analysis of the x-rays illuminating the detector. The system achieves high throughputs at low cost by dividing the required digital processing steps between a ``hardwired`` processor implemented in combinatorial digital logic, which detects the presence of the x-ray signals in the digitized data stream and extracts filtered estimates of their amplitudes, and a programmable digital signal processing computer, which refines the filtered amplitude estimates and bins them to produce the desired spectral analysis. One set of algorithms allow this hybrid system to match the resolution of analog systems while operating at much higher data rates. A second set of algorithms implemented in the processor allow the system to be self calibrating as well. The same processor also handles the interface to an external control computer. 19 figs.

  11. Digitizing neurons | ornl.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign: Potential ApplicationYu,Energy InnovationDigitalDigitizing

  12. Generic Average Modeling and Simulation of Discrete Controllers

    E-Print Network [OSTI]

    modeling of discrete controllers for PWM power conversion systems. The method applies a section be advantageous to have the capability of running AC analysis of digitally controlled power systems on a general the simulation of digitally controlled power conversion systems on general-purpose circuit simulators

  13. National Center for Digital Government National Center for Digital Government

    E-Print Network [OSTI]

    Schweik, Charles M.

    -545-1108 www.umass.edu/digitalcenter September 28, 2007 NCDG Hosts Officials from Kazakhstan The National Kazakhstan on Wednesday, September 26, 2007. Amherst, MA­ The National Center for Digital Government (NCDG) welcomed a delegation of business and government leaders from the Republic of Kazakhstan on Wednesday

  14. advanced control room: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for nuclear power and conducted. Overall, 36 participants operated a digital nuclear power plant control workstation simulation Cummings, Mary "Missy" 110 Proposal for the...

  15. active load control: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for nuclear power and conducted. Overall, 36 participants operated a digital nuclear power plant control workstation simulation Cummings, Mary "Missy" 47 Real-Time Deferrable...

  16. advanced control rooms: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for nuclear power and conducted. Overall, 36 participants operated a digital nuclear power plant control workstation simulation Cummings, Mary "Missy" 110 Proposal for the...

  17. DiLiA The Digital Library Assistant Kathrin Eichler, Holmer Hemsen, Gnter Neumann, Norbert Reithinger, Sven

    E-Print Network [OSTI]

    Neumann, Günter

    to enter a search term for searching in the digital libraries metadata. In addition, the user can add items the search in digital libraries in sev- eral dimensions. In the project advanced information visualisation meth- ods are developed for user controlled interactive search. The interaction model has been designed

  18. The influence of oscillating electromagnetic fields on membrane structure and function: Synthetic liposome and natural membrane bilayer systems with direct application to the controlled delivery of chemical agents

    SciTech Connect (OSTI)

    Liburdy, R.P.; de Manincor, D.; Fingado, B.

    1989-09-01T23:59:59.000Z

    Investigations have been conducted to determine if an imposed electromagnetic field can influence membrane transport, and ion and drug permeability in both synthetic and natural cell membrane systems. Microwave fields enhance accumulation of sodium in the lymphocyte and induce protein shedding at Tc. Microwaves also trigger membrane permeability of liposome systems under specific field exposure conditions. Sensitivity varies in a defined way in bilayers displaying a membrane structural phase transition temperature, Tc; maximal release was observed at or near Tc. Significantly, liposome systems without a membrane phase transition were also found to experience permeability increases but, in contrast, this response was temperature independent. The above results indicate that field-enhanced drug release occurs in liposome vesicles that possess a Tc as well as non-Tc liposomes. Additional studies extend non-Tc liposome responses to the in vivo case in which microwaves trigger Gentamicin release from a liposome depot'' placed subcutaneously in the rat hind leg. In addition, evidence is provided that cell surface sequestered liposomes can be triggered by microwave fields to release drugs directly into target cells. 24 refs., 6 figs.

  19. Application of the ''reactivity constraint approach'' to automatic reactor control

    SciTech Connect (OSTI)

    Bernard, J.A.; Henry, A.F.; Lanning, D.D.

    1988-02-01T23:59:59.000Z

    The ''reactivity constraint approach'' is described and demonstrated to be an effective and reliable means for the automatic control of power in nuclear reactors. This approach functions by restricting the effect of the delayed neutron populations to that which can be balanced by an induced change in the prompt population. This is done by limiting the net reactivity to the amount that can be offset by reversing the direction of motion of the automated control mechanism. The necessary reactivity constraints are obtained from the dynamic period equation, which gives the instantaneous reactor period as a function of the reactivity and the rate of change of reactivity. The derivation of this equation is described with emphasis on the recently obtained ''alternate'' formulation. Following a discussion of the behavior of each term of this alternate equation as a function of reactivity, its use in the design and operation of a nonlinear, closed-loop, digital controller for reactor power is in the design and operation of a nonlinear, closed-loop, digital controller for reactor power is described. Details of the initial experimental trials of the resulting controller are given.

  20. Digital cellular solids : reconfigurable composite materials

    E-Print Network [OSTI]

    Cheung, Kenneth Chun-Wai

    2012-01-01T23:59:59.000Z

    Digital materials are comprised of a small number of types of discrete physical building blocks, which assemble to form constructions that meet the versatility and scalability of digital computation and communication ...

  1. Understanding human mobility patterns from digital traces

    E-Print Network [OSTI]

    Yang, Yingxiang, S.M. Massachusetts Institute of Technology

    2013-01-01T23:59:59.000Z

    Our current digital age is characterized by the shift from traditional industry to an economy based on the information computerization. The sweeping changes brought about by digital computing have provided new data sources ...

  2. Cornucopia: The Concept of Digital Gastronomy

    E-Print Network [OSTI]

    Zoran, Amit Shlomo

    The authors present a new concept of digital gastronomy—Cornucopia, a futuristic cooking methodology based on digital technologies. They discuss how they have merged kitchen tools with science fiction and actual technologies ...

  3. The institutional repository in the digital library 

    E-Print Network [OSTI]

    MacColl, John; Jones, Richard D; Andrew, Theo

    We begin by looking at the concept of institutional repositories within the broader context of digital libraries. ‘Digital libraries’ can mean many things, but we consider them to be libraries first and foremost, and ...

  4. Metadata creation in digital library projects

    E-Print Network [OSTI]

    Mercer, Holly

    2003-10-10T23:59:59.000Z

    Metadata Creation in Digital Library Projects Striking a Balance: Holly Mercer University of Kansas Libraries October 10, 2003 Brick and Click Libraries Metadata Creation in Digital Library Projects Striking a Balance: ?Digital library environment... ?Metadata ?Strategies ?Library?s role What are Digital Libraries? ? Licensed electronic resources ? Archival/manuscript collections ? Departmental/research center collections ? Networked resources ? Related files with a structure & user interface...

  5. DALSA Digital Cinema 03-70-00218-01 Image Sensor Architectures for Digital

    E-Print Network [OSTI]

    Giger, Christine

    DALSA Digital Cinema 03-70-00218-01 Image Sensor Architectures for Digital Cinematography technologies available for digital cinematography now and in the near future. Image Quality: Many Paths the sensor and electronics for our Origin® digital cinematography camera, DALSA drew upon its 25 years

  6. 1 Interaction modelling for digital libraries. C@Mdx 2000 Interaction Modelling for Digital Libraries

    E-Print Network [OSTI]

    Blandford, Ann

    1 Interaction modelling for digital libraries. C@Mdx 2000 Interaction Modelling for Digital specifically to the design and evaluation of digital libraries. This work is at an early stage of development about the quality of the interaction between users and devices, using digital libraries as a test domain

  7. Digital Libraries `95 Proceedings 147 June 11-13, 1995 Digital Libraries: Issues and Architectures

    E-Print Network [OSTI]

    Redmiles, David F.

    Digital Libraries `95 Proceedings 147 June 11-13, 1995 Digital Libraries: Issues and Architectures for the Study of Digital Libraries Texas A&M University College Station, TX 77843-3112 USA {pnuern, furuta, leggett, marshall, shipman}@bush.cs.tamu.edu ABSTRACT The research field of digital libraries must

  8. Keywords: Copyright Protection, Digital Watermark, Spread Spectrum, A Secure Robust Digital Image Watermark

    E-Print Network [OSTI]

    Genève, Université de

    is also outlined. 1. INTRODUCTION Digital media have become common and haveincreasingly taken overand have for favoring digital media. Infrastructure such as computers, printers and high rate digital transmission an ecient cost-eective means of distributing digital media. The popularity of the World Wide Web has clearly

  9. 1 | P a g e Living a Digital Life Camp Camp: Living a Digital Life

    E-Print Network [OSTI]

    Seldin, Jonathan P.

    , captchas, social media, MMORPG -- this camp explores the digital world from both the user1 | P a g e Living a Digital Life Camp Camp: Living a Digital Life August 11- 15 for participants 11 - 13 years old General description: We live in a digital world, where the ground shifts faster

  10. Digital Arts The digital arts major offers coursework on a range of topics including

    E-Print Network [OSTI]

    Miles, Will

    Florida's growing digital media industry and world-famous tourism industry. Our relationshipDigital Arts The digital arts major offers coursework on a range of topics including image in these departments should consider the digital arts minor as a way to investigate the creative applications

  11. Keywords: Copyright Protection, Digital Watermark, Spread Spectrum, A Secure Robust Digital Image Watermark

    E-Print Network [OSTI]

    Genève, Université de

    used for this purpose is also outlined. 1. INTRODUCTION Digital media have become common and have number of technical reasons for favoring digital media. Infrastructure such as computers, printers widespread. Digital networks also provide an efficient cost­effective means of distributing digital media

  12. Digital Soil Mapping: Interactions with

    E-Print Network [OSTI]

    Grunwald, Sabine

    Chapter 21 Digital Soil Mapping: Interactions with and Applications for Hydropedology J.A. Thompson,1, * S. Roecker,2 S. Grunwald3 and P.R. Owens4 ABSTRACT Spatial information on soils, particularly hydrologic and hydromorphic soil properties, is used to understand and assess soil water retention, flooding

  13. Transmission of digital images within the NTSC analog format

    DOE Patents [OSTI]

    Nickel, George H.

    2004-06-15T23:59:59.000Z

    HDTV and NTSC compatible image communication is done in a single NTSC channel bandwidth. Luminance and chrominance image data of a scene to be transmitted is obtained. The image data is quantized and digitally encoded to form digital image data in HDTV transmission format having low-resolution terms and high-resolution terms. The low-resolution digital image data terms are transformed to a voltage signal corresponding to NTSC color subcarrier modulation with retrace blanking and color bursts to form a NTSC video signal. The NTSC video signal and the high-resolution digital image data terms are then transmitted in a composite NTSC video transmission. In a NTSC receiver, the NTSC video signal is processed directly to display the scene. In a HDTV receiver, the NTSC video signal is processed to invert the color subcarrier modulation to recover the low-resolution terms, where the recovered low-resolution terms are combined with the high-resolution terms to reconstruct the scene in a high definition format.

  14. Center for Music Experiment: Creating a Digital Collection

    E-Print Network [OSTI]

    Garcia-Spitz, Cristela; Kesner, David; Reser, Greg

    2011-01-01T23:59:59.000Z

    Tascam high-definition digital recorder • Sony industrialBetamax w/Sony PCM digital interface • Nakamichi & Denon

  15. Group Blind Digital Signatures: Theory and Applications

    E-Print Network [OSTI]

    Goldwasser, Shafi

    Group Blind Digital Signatures: Theory and Applications by Zulfikar Amin Ramzan Submitted by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Arthur C. Smith Chairman, Departmental Committee on Graduate Students #12; Group Blind Digital Signatures cryptographic construct called a Group Blind Digital Signature. This construct combines the already existing

  16. Interactive Digital Photomontage Aseem Agarwala1

    E-Print Network [OSTI]

    Kazhdan, Michael

    Interactive Digital Photomontage Aseem Agarwala1 Mira Dontcheva1 Maneesh Agrawala2 Steven Drucker2 of photographs into a single composite picture ---(of course with minimum visible artifacts !!!!) 2 Interactive Digital Photomontage Presented by : Gagan Bansal #12;Interactive Digital Photomontage Presented by : Gagan

  17. Geoffrey R Weller Library Digital Initiatives Librarian

    E-Print Network [OSTI]

    Northern British Columbia, University of

    Geoffrey R Weller Library Digital Initiatives Librarian (Two Year Term Position) The Geoffrey R information technology as well as to manage, maintain, and develop the library's digital infrastructure in Libraryand Information Studies. Experience with the delivery of digital library services is required

  18. Digital image library development in academic environment

    E-Print Network [OSTI]

    Corran, Ruth

    1 Digital image library development in academic environment: designing and testing usability@aup.fr Keywords: Digital image library, usability, student projects, participatory design Abstract Case study Purpose By reporting the experience gained in the development of a digital image library in academic

  19. Access Digital Library, Search, News and more

    E-Print Network [OSTI]

    Goodrich, Lisa V.

    [General] Access Digital Library, Search, News and more [Education] Access MyCourses content [Research] Access Digital Library, NCBI Blast and more [Personal] Access your portable bookmarks using My and 500 textbooks via the Digital Library, one click access to NCBI Blast sequence databases. [General

  20. DIGITAL SOIL RESOURCE INVENTORIES: STATUS AND PROSPECTS

    E-Print Network [OSTI]

    Rossiter, D G "David"

    DIGITAL SOIL RESOURCE INVENTORIES: STATUS AND PROSPECTS D G Rossiter Department of Earth Systems an inventory of digital soils data and supporting information available or publicized on the World Wide Web-scale inventories, especially using the SOTER methodology. Large-scale digital data are limited to the USA, Canada

  1. Geosciences 466/566 Digital Image Processing

    E-Print Network [OSTI]

    Wright, Dawn Jeannine

    Geosciences 466/566 Digital Image Processing Winter 2007 Instructor Dr. Anne Nolin Wilkinson 120 This course focuses on the digital image processing of satellite image data. Topics include: data types, image://my.oregonstate.edu Textbook Jensen, J. R., Digital Image Processing: A Remote Sensing Perspective, 3rd Edition, Prentice Hall

  2. Collection Metadata Solutions for Digital Library Applications

    E-Print Network [OSTI]

    Janée, Greg

    Collection Metadata Solutions for Digital Library Applications Linda L. Hill and Greg Jane´ e Alexandria Digital Library Project, University of California, Santa Barbara, 1205 Girvetz, Santa Barbara, CA a digital library, collections may range from an ad hoc set of objects that serve a temporary purpose

  3. Impact Schedule Building Interactive Digital Libraries

    E-Print Network [OSTI]

    New Ideas Impact Schedule Building Interactive Digital Libraries of Formal Algorithmic Knowledge Winter 2002 Elaborate conceptual basis for FDL Implement Prototype Formal Digital Library Add content in formal digital libraries § The project is testing these mechanisms and tools in a prototype formal

  4. Augmented Shelf: Digital Enrichment of Library Shelves

    E-Print Network [OSTI]

    Reiterer, Harald

    Augmented Shelf: Digital Enrichment of Library Shelves Eike Kleiner1 , Benjamin Schäfer2;Augmented Shelf: Digital Enrichment of Library Shelves 2 yon 2007) and Augmented Reality (Azuma 1997) a prototype1 was designed which supports users browsing the physical shelves enriched with digital functions

  5. Real-Time Digital Watermarking System for

    E-Print Network [OSTI]

    Bruck, Jehoshua (Shuki)

    Engineering #12;2 Abstract Recent development in the field of digital media raises the issue of copyright see a growing trend of converting analog media to digital one. This is true for still images, video of digital media is easier, and there is no information or qua

  6. Internship -Fall 2011 Search Solutions Digital Media

    E-Print Network [OSTI]

    Cinabro, David

    Internship - Fall 2011 Search Solutions Digital Media SSdigitalmedia.com About us: Search Solutions Search Solutions Digital Media 1500 N. Stephenson HWY Royal Oak, MI 48067 Amanda are a full service digital advertising agency. We build custom web packages to meet our clients' exact needs

  7. Performance of the Fully Digital FPGA-based Front-End Electronics for the GALILEO Array

    E-Print Network [OSTI]

    D. Barrientos; M. Bellato; D. Bazzacco; D. Bortolato; P. Cocconi; A. Gadea; V. González; M. Gulmini; R. Isocrate; D. Mengoni; A. Pullia; F. Recchia; D. Rosso; E. Sanchis; N. Toniolo; C. A. Ur; J. J. Valiente-Dobón

    2014-06-16T23:59:59.000Z

    In this work we present the architecture and results of a fully digital Front End Electronics (FEE) read out system developed for the GALILEO array. The FEE system, developed in collaboration with the Advanced Gamma Tracking Array (AGATA) collaboration, is composed of three main blocks: preamplifiers, digitizers and preprocessing electronics. The slow control system contains a custom Linux driver, a dynamic library and a server implementing network services. The digital processing of the data from the GALILEO germanium detectors has demonstrated the capability to achieve an energy resolution of 1.53 per mil at an energy of 1.33 MeV.

  8. Multi-camera: interactive rendering of abstract digital images

    E-Print Network [OSTI]

    Smith, Jeffrey Statler

    2004-09-30T23:59:59.000Z

    Control................... 33 IV.3.DrawingOptions ...................... 36 IV.4.RenderingOptions ..................... 39 VRESULTS.............................. 40 V.1.DigitalPaintings ...................... 40 V.2.TraditionalMedia...................... 44 V.3.Animation... and methods related to a wide range of media to converge and be redefined through the adaptability and robustness of computer software. Hence, computer art has become an increasingly popular means of creative expression and experimentation. As computer...

  9. PID control of gas pipelines

    SciTech Connect (OSTI)

    Coltharp, B.; Bergmann, J. [Baker CAC, Kingwood, TX (United States)

    1996-09-01T23:59:59.000Z

    The use of low cost digital controllers for pipeline control is increasing as the reliability and cost improves. In pipeline applications, the proportional, integral, and derivative (PID) controller algorithm is often used. However, the unique problems associated with pipeline operation have caused manufacturers to modify the basic control algorithms. Features such as set point ramping, built in pressure control, freeze on input error, and high and low output limits help assure safe and predictable pipeline operation.

  10. Chapter 19: HVAC Controls (DDC/EMS/BAS) Evaluation Protocol

    SciTech Connect (OSTI)

    Romberger, J.

    2014-11-01T23:59:59.000Z

    The HVAC Controls Evaluation Protocol is designed to address evaluation issues for direct digital controls/energy management systems/building automation systems (DDC/EMS/BAS) that are installed to control heating, ventilation, and air-conditioning (HVAC) equipment in commercial and institutional buildings. (This chapter refers to the DDC/EMS/BAS measure as HVAC controls.) This protocol may also be applicable to industrial facilities such as clean rooms and labs, which have either significant HVAC equipment or spaces requiring special environmental conditions. This protocol addresses only HVAC-related equipment and the energy savings estimation methods associated with installing such control systems as an energy efficiency measure. The affected equipment includes: Air-side equipment (air handlers, direct expansion systems, furnaces, other heating- and cooling-related devices, terminal air distribution equipment, and fans); Central plant equipment (chillers, cooling towers, boilers, and pumps). These controls may also operate or affect other end uses, such as lighting, domestic hot water, irrigation systems, and life safety systems such as fire alarms and other security systems. Considerable nonenergy benefits, such as maintenance scheduling, system component troubleshooting, equipment failure alarms, and increased equipment lifetime, may also be associated with these systems. When connected to building utility meters, these systems can also be valuable demand-limiting control tools. However, this protocol does not evaluate any of these additional capabilities and benefits.

  11. Role for Distributed Energy Resources (DER) in the Digital Economy

    SciTech Connect (OSTI)

    Key, Thomas S [Electric Power Research Institute (EPRI)

    2007-11-01T23:59:59.000Z

    A large, and growing, part of the Nation's economy either serves or depends upon the information technology industry. These high-tech or "digital" enterprises are characterized by a dependence on electronic devices, need for completely reliable power supply, and intolerance to any power quality problems. In some cases these enterprises are densely populated with electronic loads and have very high energy usage per square foot. Serving these enterprises presents both electric power and equipment cooling challenges. Traditional electric utilities are often hard-pressed to deliver power that meets the stringent requirements of digital customers, and the economic and social consequences of a service quality or reliability problem can be large. New energy delivery and control options must be developed to effectively serve a digital economy. This report explores how distributed energy resources, partnerships between utility and customer to share the responsibility for service quality, innovative facility designs, higher energy efficiencies and waste-heat utilization can be coupled to meet the needs of a growing digital economy.

  12. ISSUES ASSOCIATED WITH PROBABILISTIC FAILURE MODELING OF DIGITAL SYSTEMS

    SciTech Connect (OSTI)

    CHU,T.L.; MARTINEZ-GURIDI,G.; LEHNER,J.; OVERLAND,D.

    2004-09-19T23:59:59.000Z

    The current U.S. Nuclear Regulatory Commission (NRC) licensing process of instrumentation and control (I&C) systems is based on deterministic requirements, e.g., single failure criteria, and defense in depth and diversity. Probabilistic considerations can be used as supplements to the deterministic process. The National Research Council has recommended development of methods for estimating failure probabilities of digital systems, including commercial off-the-shelf (COTS) equipment, for use in probabilistic risk assessment (PRA). NRC staff has developed informal qualitative and quantitative requirements for PRA modeling of digital systems. Brookhaven National Laboratory (BNL) has performed a review of the-state-of-the-art of the methods and tools that can potentially be used to model digital systems. The objectives of this paper are to summarize the review, discuss the issues associated with probabilistic modeling of digital systems, and identify potential areas of research that would enhance the state of the art toward a satisfactory modeling method that could be integrated with a typical probabilistic risk assessment.

  13. Synchronous multi-microprocessor system for implementing digital signal processing algorithms

    SciTech Connect (OSTI)

    Barnwell, T.P. III; Hodges, C.J.M.

    1982-01-01T23:59:59.000Z

    This paper discusses the details of a multi-microprocessor system design as a research facility for studying multiprocessor implementation of digital signal processing algorithms. The overall system, which consists of a control microprocessor, eight satellite microprocessors, a control minicomputer, and extensive distributed software, has proven to be an effect tool in the study of multiprocessor implementations. 5 references.

  14. Anawake: Signal-Based Power Management For Digital Signal Processing Systems

    E-Print Network [OSTI]

    Lazzaro, John

    , and controls the power consumption of the DSP system in a signal-dependent way. We estimate system power-listening model; for other applications (wordspotting systems for surveillance, speech control for the physicallyAnawake: Signal-Based Power Management For Digital Signal Processing Systems John Lazzaro and John

  15. Centro Digitization Project Coordinator The Center for Puerto Rican Studies (Centro de Estudios Puertorriqueos, or Centro) at Hunter College,

    E-Print Network [OSTI]

    Qiu, Weigang

    control, content management, and preservation of digital collections according to national standards time management and exercising supervisory responsibilities. · Familiarity or knowledge of archival preservation issues and experience handling rare and delicate archival and library materials. · Knowledge

  16. Digial Technology Qualification Task 2 - Suitability of Digital Alternatives to Analog Sensors and Actuators

    SciTech Connect (OSTI)

    Ted Quinn; Jerry Mauck

    2012-09-01T23:59:59.000Z

    The next generation reactors in the U.S. are an opportunity for vendors to build new reactor technology with advanced Instrumentation and Control Systems (control rooms, DCS, etc.). The advances made in the development of many current generation operating reactors in other parts of the world are being used in the design and construction of new plants. These new plants are expected to have fully integrated digital control rooms, computerized procedures, integrated surveillance testing with on-line monitoring and a major effort toward improving the O&M and fault survivability of the overall systems. In addition the designs are also incorporating major improvements in the man-machine interface based on lessons learned in nuclear and other industries. The above relates primarily to the scope of supply in instrumentation and control systems addressed by Chapter 7 of the Standard Review Plan (SRP) NUREG-0800 (Reference 9.5), and the associated Balance of Plant (BOP) I&C systems. This does not relate directly to the actuator and motor, breaker, initiation circuitry, valve position, etc. which is the subject of this report and normally outside of the traditional Distributed Control System (DCS), for both safety and non-safety systems. The recommendations presented in this report will be used as input to I&C research programming for the implementation of lessons learned during the early phases of new build both for large light water reactors (LWR) and also small modular reactors (SMR). This report is intended to support current research plans and provide user (vendor, owner-operator) input to the optimization of these research plans.

  17. Digital System Clocking:Digital System Clocking:Digital System Clocking: HighHigh--Performance and LowPerformance and Low--Power AspectsPower Aspects

    E-Print Network [OSTI]

    California at Davis, University of

    in a digital systemTiming in a digital system using a single clock andusing a single clock and flipflipDigital System Clocking:Digital System Clocking:Digital System Clocking: HighHigh--Performance and LowPerformance and Low--Power AspectsPower Aspects Vojin G. Oklobdzija, Vladimir M. Stojanovic, Dejan

  18. Digital Games and Biodiversity Conservation

    E-Print Network [OSTI]

    Sandbrook, Chris; Adams, William M.; Monteferri, Bruno

    2014-06-16T23:59:59.000Z

    for mobile devices such as Endomondo), or the virtual world (e.g. the ability to „like? material on Facebook, creating a competitive dynamic and encouraging further engagement). 3. Digital games and the conservation of biodiversity This article... ConservationPark, a Facebook game, claims to support conservation, but gives no details of what proportion of in-game purchases are donated, or to which organisations. 3.2.3 Games for Conservation Research, Monitoring and Planning The use of games...

  19. Summary of electric vehicle dc motor-controller tests

    SciTech Connect (OSTI)

    McBrien, E F; Tryon, H B

    1982-09-01T23:59:59.000Z

    Available performance data for production motors are usually of marginal value to the electric vehicle designer. To provide at least a partial remedy to this situation, tests of typical dc propulsion motors and controllers were conducted as part of the DOE Electric Vehicle Program. The objectives of this program were to evaluate the differences in the performance of dc motors when operating with chopper-type controllers and when operating on direct current; and to gain an understanding of the interactions between the motor and the controller which cause these differences. Toward this end, motor-controller tests performed by the NASA Lewis Research Center provided some of the first published data that quantified motor efficiency variations for both ripple-free (straight dc) and chopper modes of operation. Test and analysis work at the University of Pittsburgh explored motor-controller relationships in greater depth. And to provide additional data, 3E Vehicles tested two small motors, both on a dynamometer and in a vehicle, and the Eaton Corporation tested larger motors, using sophisticated instrumentation and digital processing techniques. All the motors tested were direct-current types. Of the separately excited types, seven were series wound and two were shunt wound. One self-excited permanent magnet type was also tested. Four of the series wound motors used brush shifting to obtain good commutation. In almost all cases, controller limitations constrained the test envelope so that the full capability of the motors could not be explored.

  20. Building Digital Libraries for Scientific Data: An Exploratory Study of Data Pratices in Habitat Ecology

    E-Print Network [OSTI]

    Borgman, C L; Wallis, J C; Enyedy, N

    2006-01-01T23:59:59.000Z

    Building Digital Libraries for Scientific Data: Anscientific capital, digital libraries of data become morecollaborative research [1]. Digital libraries are essential

  1. PDX diagnostic control system

    SciTech Connect (OSTI)

    Mika, R.

    1981-01-01T23:59:59.000Z

    This paper describes a computer-base diagnostic control system operating on the PDX Tokamak. The prime function of the system is to control mechanical positioning devices associated with various diagnostics including Thomson Scattering, X-Ray Pulse Height Analyzer, Rotating Scanning Monochromator, Fast Ion Detection Experiment, Bolometers and Plasma Limiters. The diagnostic control system consists of a PDP-11/34 computer, a CAMAC system partitioned between the PDX control room and the PDX machine area, and special electronic control modules developed at PPL. The special modules include a digital closed loop motor controller and user interface control panel for control and status display. A standard control panel was developed for interfacing each system user with the PDP-11/34 computer, through specially developed CAMAC modules.

  2. Superconducting VAR control. [Patent application

    DOE Patents [OSTI]

    Boenig, H.J.; Hassenzahl, W.V.

    1980-12-05T23:59:59.000Z

    Static VAR control means are described employing an asymmetrically controlled Graetz bridge and a superconducting direct current coil having low losses and low cost characteristics.

  3. Radiological Control - DOE Directives, Delegations, and Requirements

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection Radiation Protection Regulations: TheCompetitionScience

  4. Method and apparatus for analog signal conditioner for high speed, digital x-ray spectrometer

    DOE Patents [OSTI]

    Warburton, William K. (1300 Mills St., Menlo Park, CA 94025); Hubbard, Bradley (Santa Cruz, CA)

    1999-01-01T23:59:59.000Z

    A signal processing system which accepts input from an x-ray detector-preamplifier and produces a signal of reduced dynamic range for subsequent analog-to-digital conversion. The system conditions the input signal to reduce the number of bits required in the analog-to-digital converter by removing that part of the input signal which varies only slowly in time and retaining the amplitude of the pulses which carry information about the x-rays absorbed by the detector. The parameters controlling the signal conditioner's operation can be readily supplied in digital form, allowing it to be integrated into a feedback loop as part of a larger digital x-ray spectroscopy system.

  5. KU Libraries Digital Data Services Strategy

    E-Print Network [OSTI]

    McEathron, Scott R.

    2013-01-16T23:59:59.000Z

    The University of Kansas KU Libraries Digital Data Services Strategy Scott McEathron Rhonda Houser Geoffrey Husic Michele Lubbers Julie Petr Jennifer Roach Mickey Waxman Xanthippe Wedel 1/8/2013 KU Libraries Digital Data... ............................................................................................................... 8 KU Libraries Digital Data Services Strategy January 8, 2013 2 Introduction As part of the University of Kansas (KU) Libraries’ strategic planning process, two teams have been tasked to implement actions supporting the strategy...

  6. Behavioral modeling and digital calibration of pipeline analog to digital converters 

    E-Print Network [OSTI]

    Bilhan, Erkan

    2001-01-01T23:59:59.000Z

    This research focuses on digital calibration of pipeline analog to digital converters (ADCs) and also modeling of error sources and design parameters of pipeline ADCs. Modern applications such as communications systems require high resolution ADCs...

  7. Behavioral modeling and digital calibration of pipeline analog to digital converters

    E-Print Network [OSTI]

    Bilhan, Erkan

    2001-01-01T23:59:59.000Z

    This research focuses on digital calibration of pipeline analog to digital converters (ADCs) and also modeling of error sources and design parameters of pipeline ADCs. Modern applications such as communications systems require high resolution ADCs...

  8. DCC Digital Curation Manual: Instalment on Open Source for Digital Curation 

    E-Print Network [OSTI]

    McHugh, Andrew

    2005-08-01T23:59:59.000Z

    Instalment on the role of open source software within the digital curation lifecycle. Describes a range of explicit digital curation application areas for open source, some examples of existing uses of open source software, ...

  9. Digital Data Genesis Dynamic Capability and Information

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    meters, automobiles, and industrial machines that sense, create and communicate data in the "digitalized............................................................................................................... 10 4.3.3 Firm History

  10. Gamma ray spectroscopy employing divalent europium-doped alkaline earth halides and digital readout for accurate histogramming

    DOE Patents [OSTI]

    Cherepy, Nerine Jane; Payne, Stephen Anthony; Drury, Owen B; Sturm, Benjamin W

    2014-11-11T23:59:59.000Z

    A scintillator radiation detector system according to one embodiment includes a scintillator; and a processing device for processing pulse traces corresponding to light pulses from the scintillator, wherein pulse digitization is used to improve energy resolution of the system. A scintillator radiation detector system according to another embodiment includes a processing device for fitting digitized scintillation waveforms to an algorithm based on identifying rise and decay times and performing a direct integration of fit parameters. A method according to yet another embodiment includes processing pulse traces corresponding to light pulses from a scintillator, wherein pulse digitization is used to improve energy resolution of the system. A method in a further embodiment includes fitting digitized scintillation waveforms to an algorithm based on identifying rise and decay times; and performing a direct integration of fit parameters. Additional systems and methods are also presented.

  11. Key Factors for Digital Collections August 7, 2007

    E-Print Network [OSTI]

    by Fondren's Digital Library Initiative We evaluate digital projects on a case by case basis. There is no oneKey Factors for Digital Collections August 7, 2007 Rice University Digital Repository Supported formula for this process and in fact welcome open discussion on potential digital projects

  12. UNIVERSITY OF CALIFORNIA, SANTA CRUZ DEPARTMENT OF FILM & DIGITAL MEDIA

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    UNIVERSITY OF CALIFORNIA, SANTA CRUZ DEPARTMENT OF FILM & DIGITAL MEDIA Lecturer Pool: Digital Media Production and Critical Studies The Film and Digital Media Department at the University courses in the area of digital media production and/or the critical study of digital media. Qualified

  13. Non-realistic digital rendering

    E-Print Network [OSTI]

    Ronai, Amanda Sharon

    1994-01-01T23:59:59.000Z

    . The intent of the digital model is to render a more expressive, visually interesting image. ACKNOWLEDGEMENTS I would like to thank my advisory committee, Susan L. Van Baerle, Dr. Donald H. House, and Dr. Norman C. Griswold for its support... and encouragement. I would especially like to thank Susan L. Van Baerle for reading numerous editions and giving speedy and helpful feedback. I would also like to thank Dr. Donald H. House for his support and helpful technical knowledge and finally, I would like...

  14. Digital Lumens | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOE Facility DatabaseMichigan:Dewey-Humboldt,DickensonDiengDigital Lumens Jump

  15. Departmental Directives Program

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2006-08-16T23:59:59.000Z

    The Order is the primary directive for administering the Department's directives Program. Cancels: DOE O 251.1A

  16. RESIDENTIAL THERMOSTATS: COMFORT CONTROLS IN CALIFORNIA HOMES

    E-Print Network [OSTI]

    Meier, Alan K.

    2008-01-01T23:59:59.000Z

    cooling and ventilating controls are more sophisticated than commonly available in North America 29 . Remoteand cooling systems. Future thermostats may reside in PCs, digital picture frames, or other kinds of remote

  17. Consortium on Digital Energy CoDE | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof EnergyInnovationinConcentrating SolarConsortium on Digital Energy CoDE Jump to:

  18. Automated Design of Pin-Constrained Digital Microfluidic Arrays for Lab-on-a-Chip Applications*

    E-Print Network [OSTI]

    Chakrabarty, Krishnendu

    Automated Design of Pin-Constrained Digital Microfluidic Arrays for Lab-on-a-Chip Applications University, Durham, NC 27708, USA {wlh,fs,krish}@ee.duke.edu ABSTRACT Microfluidics-based biochips, also of discrete droplets on a microfluidic array. In contrast to the direct-addressing scheme that has been

  19. A Stochastic Time-to-Digital Converter for Digital Phase-Locked Loops submitted to

    E-Print Network [OSTI]

    Moon, Un-Ku

    A Stochastic Time-to-Digital Converter for Digital Phase-Locked Loops by Kerem Ok A THESIS. Thanks to Tufan for always being ready to go lifting or to Platinum (Thanks Dave) or Senor Sam's with me.1.2 Synthesis Using Digital PLLs........................................................ 8 3. STOCHASTIC TIME

  20. Processamento digitalProcessamento digital de sinais e imagensde sinais e imagens

    E-Print Network [OSTI]

    Carvalho, João Luiz

    1 Processamento digitalProcessamento digital de sinais e imagensde sinais e imagens Prof. João LuizProcessamento digital de sinais e imagenssinais e imagens Tratar sinais e imagensTratar sinais e imagensDimensionalidade dos sinais xx yy m(x,y)m(x,y) Imagens coloridasImagens coloridas CombinaCombinaçção de 3 funão de 3

  1. Enhancing Digital Literacy by Multi-modal Data Mining of the Digital Lifespan

    E-Print Network [OSTI]

    Collomosse, John

    Edinburgh, UK m.j.chantler@hw.ac.uk ABSTRACT Social media pervades modern digital society, yet despite its promotes digital literacy of social media through design of novel technological interventions that raise awareness of the digital personhood. We describe progress towards automatic social media data-mining capa

  2. The Digital Video Library System:Vision and (published, Digital Library'94,college Station, TX,47-52)

    E-Print Network [OSTI]

    Kansas, University of

    1 The Digital Video Library System:Vision and Design (published, Digital Library'94,college Station will describe the design of a Digital Video Library System (DVLS) suitable for storing, indexing, searching segments stored in remote digital libraries, specifically automatic video indexing and digital video

  3. Beat the Summer Slump with Smithsonian Digital Badges Digital Badge Program Encourages Kids to Be Creative and Curious

    E-Print Network [OSTI]

    Mathis, Wayne N.

    will process digital data on the moon, sun, star clusters, nebulas and galaxies and turn them into astoundinglyBeat the Summer Slump with Smithsonian Digital Badges Digital Badge Program Encourages Kids for Learning and Digital Access, Smithsonian Quest digital badges focus mainly on art, history and science

  4. Adaptive control for accelerators

    DOE Patents [OSTI]

    Eaton, Lawrie E. (Los Alamos, NM); Jachim, Stephen P. (Los Alamos, NM); Natter, Eckard F. (Santa Fe, NM)

    1991-01-01T23:59:59.000Z

    An adaptive feedforward control loop is provided to stabilize accelerator beam loading of the radio frequency field in an accelerator cavity during successive pulses of the beam into the cavity. A digital signal processor enables an adaptive algorithm to generate a feedforward error correcting signal functionally determined by the feedback error obtained by a beam pulse loading the cavity after the previous correcting signal was applied to the cavity. Each cavity feedforward correcting signal is successively stored in the digital processor and modified by the feedback error resulting from its application to generate the next feedforward error correcting signal. A feedforward error correcting signal is generated by the digital processor in advance of the beam pulse to enable a composite correcting signal and the beam pulse to arrive concurrently at the cavity.

  5. CMOS-compatible InP/InGaAs digital photoreceiver

    DOE Patents [OSTI]

    Lovejoy, Michael L. (Albuquerque, NM); Rose, Benny H. (Albuquerque, NM); Craft, David C. (Albuquerque, NM); Enquist, Paul M. (Cary, NC); Slater, Jr., David B. (Raleigh, NC)

    1997-01-01T23:59:59.000Z

    A digital photoreceiver is formed monolithically on an InP semiconductor substrate and comprises a p-i-n photodetector formed from a plurality of InP/InGaAs layers deposited by an epitaxial growth process and an adjacent heterojunction bipolar transistor (HBT) amplifier formed from the same InP/InGaAs layers. The photoreceiver amplifier operates in a large-signal mode to convert a detected photocurrent signal into an amplified output capable of directly driving integrated circuits such as CMOS. In combination with an optical transmitter, the photoreceiver may be used to establish a short-range channel of digital optical communications between integrated circuits with applications to multi-chip modules (MCMs). The photoreceiver may also be used with fiber optic coupling for establishing longer-range digital communications (i.e. optical interconnects) between distributed computers or the like. Arrays of digital photoreceivers may be formed on a common substrate for establishing a plurality of channels of digital optical communication, with each photoreceiver being spaced by less than about 1 mm and consuming less than about 20 mW of power, and preferably less than about 10 mW. Such photoreceiver arrays are useful for transferring huge amounts of digital data between integrated circuits at bit rates of up to about 1000 Mb/s or more.

  6. CMOS-compatible InP/InGaAs digital photoreceiver

    DOE Patents [OSTI]

    Lovejoy, M.L.; Rose, B.H.; Craft, D.C.; Enquist, P.M.; Slater, D.B. Jr.

    1997-11-04T23:59:59.000Z

    A digital photoreceiver is formed monolithically on an InP semiconductor substrate and comprises a p-i-n photodetector formed from a plurality of InP/InGaAs layers deposited by an epitaxial growth process and an adjacent heterojunction bipolar transistor (HBT) amplifier formed from the same InP/InGaAs layers. The photoreceiver amplifier operates in a large-signal mode to convert a detected photocurrent signal into an amplified output capable of directly driving integrated circuits such as CMOS. In combination with an optical transmitter, the photoreceiver may be used to establish a short-range channel of digital optical communications between integrated circuits with applications to multi-chip modules (MCMs). The photoreceiver may also be used with fiber optic coupling for establishing longer-range digital communications (i.e. optical interconnects) between distributed computers or the like. Arrays of digital photoreceivers may be formed on a common substrate for establishing a plurality of channels of digital optical communication, with each photoreceiver being spaced by less than about 1 mm and consuming less than about 20 mW of power, and preferably less than about 10 mW. Such photoreceiver arrays are useful for transferring huge amounts of digital data between integrated circuits at bit rates of up to about 1,000 Mb/s or more. 4 figs.

  7. The Sloan Digital Sky Survey

    E-Print Network [OSTI]

    Bruce Margon

    1998-08-19T23:59:59.000Z

    The Sloan Digital Sky Survey is an ambitious, multi-institutional project to create a huge digital imaging and spectroscopic data bank of 25% of the celestial sphere, approximately 10,000 deg^2 centred on the north galactic polar cap. The photometric atlas will be in 5 specially-chosen colours, covering the pi ster of the Survey area to a limiting magnitude of r~23.1, on 0.4" pixels, resulting in a 1 Tpixel map. This data base will be automatically analysed to catalog the photometric and astrometric properties of 10^8 stellar images, 10^8 galaxies, and 10^6 colour-selected QSO candidates; the galaxy data will in addition include detailed morphological data. The photometric data are used to autonomously and homogeneously select objects for the spectroscopic survey, which will include spectra of 10^6 galaxies, 10^5 QSOs, and 10^5 unusual stars. Although the project was originally motivated by the desire to study Large Scale Structure, we anticipate that these data will impact virtually every field of astronomy, from Earth-crossing asteroids to QSOs at z>6. In particular, the ~12 TByte multi-colour, precision calibrated imaging archive should be a world resource for many decades of the next century.

  8. Digital Storytelling & Documentary Development Presented by Public Partnership & Outreach,

    E-Print Network [OSTI]

    Behmer, Spencer T.

    process to improve narrative and expository composition Participants will design a digital storyDigital Storytelling & Documentary Development Presented by Public Partnership & Outreach, Office in a multimodal world of technology. Learn how to combine digital technology applications with classroom content

  9. Digital Dynamic Range Compressor Design--A Tutorial and Analysis

    E-Print Network [OSTI]

    Reiss, Josh

    PAPERS Digital Dynamic Range Compressor Design-- A Tutorial and Analysis DIMITRIOS GIANNOULIS formal knowledge and analysis of compressor design techniques. In this tutorial we describe several different approaches to digital dynamic range compressor design. Digital implementations of several classic

  10. From Point to Pixel: A Genealogy of Digital Aesthetics

    E-Print Network [OSTI]

    Hoy, Meredith Anne

    2010-01-01T23:59:59.000Z

    From Point to Pixel: A Genealogy of Digital Aesthetics byFrom Point to Pixel: A Genealogy of Digital Aesthetics byFrom Point to Pixel: A Genealogy of Digital Aesthetics, I

  11. The ADEPT Digital Library Architecture Department of Computer Science

    E-Print Network [OSTI]

    Janée, Greg

    The ADEPT Digital Library Architecture Greg Janée Department of Computer Science University distributed digital libraries of georeferenced information. An ADEPT system comprises one or more autonomous, working to develop distributed digital libraries for heterogeneous georeferenced information. Distributed

  12. Original articles The Stanford Digital Library metadata architecturec

    E-Print Network [OSTI]

    Gravano, Luis

    Original articles The Stanford Digital Library metadata architecturec Michelle Baldonado, Chen / Accepted: 14 January 1997 Abstract. The overall goal of the Stanford Digital Library project is to provide an infrastructure that aords interoperability among heterogeneous, autono- mous digital library services

  13. ACM Digital Library )http://www.acm.org/dl(

    E-Print Network [OSTI]

    Ben-Or, Michael

    ­ 111 © , ACM Digital Library ) ( )http://www.acm.org/dl( ISI Web of Knowledge- . . ACM Digital Library -Association for Computing Machinery (ACM), . . " -ACM © , : -ACM o -ACM o -ACM " " ( -ACM) #12; ­ 411 © , -Digital Library

  14. Toward petabyte digital content transfer and preservation over optical networks

    E-Print Network [OSTI]

    Liu, Shaofeng

    2010-01-01T23:59:59.000Z

    A unique feature of digital media content is its mobility.life cycle of a movie, digital media will need to be movedand physical preservation of digital media assets no longer

  15. Digital Media in History: Remediating Data and Narratives

    E-Print Network [OSTI]

    Tanaka, Stefan

    2009-01-01T23:59:59.000Z

    History and New Media Digital Media in History: Remediatingto think about how digital media help us to teach, research,history. The computer and digital media are terrific tools

  16. Social Media QMUL Digital Communications Strategy Social Media

    E-Print Network [OSTI]

    Chittka, Lars

    Social Media ­ QMUL Digital Communications Strategy 1 Social Media QMUL Media ­ QMUL Digital Communications Strategy 2 Use of this document Use Media ­ QMUL Digital Communications Strategy 3 What is social media

  17. Digital Apollo: Human and Machine in Spaceflight

    E-Print Network [OSTI]

    Digital Apollo: Human and Machine in Spaceflight David A. Mindell The MIT Press Cambridge of America. Library of Congress Cataloging-in-Publication Data Mindell, David A. Digital Apollo : human-0-262-13497-2 (hardcover : alk. paper) 1. Human-machine systems. 2. Project Apollo (U.S.)--History. 3. Astronautics

  18. Control system devices : architectures and supply channels overview.

    SciTech Connect (OSTI)

    Trent, Jason; Atkins, William Dee; Schwartz, Moses Daniel; Mulder, John C.

    2010-08-01T23:59:59.000Z

    This report describes a research project to examine the hardware used in automated control systems like those that control the electric grid. This report provides an overview of the vendors, architectures, and supply channels for a number of control system devices. The research itself represents an attempt to probe more deeply into the area of programmable logic controllers (PLCs) - the specialized digital computers that control individual processes within supervisory control and data acquisition (SCADA) systems. The report (1) provides an overview of control system networks and PLC architecture, (2) furnishes profiles for the top eight vendors in the PLC industry, (3) discusses the communications protocols used in different industries, and (4) analyzes the hardware used in several PLC devices. As part of the project, several PLCs were disassembled to identify constituent components. That information will direct the next step of the research, which will greatly increase our understanding of PLC security in both the hardware and software areas. Such an understanding is vital for discerning the potential national security impact of security flaws in these devices, as well as for developing proactive countermeasures.

  19. Automated Test and Evaluation Center for Waveform Digitizer Systems and Components

    SciTech Connect (OSTI)

    Green, P.J.

    1989-01-01T23:59:59.000Z

    In our instrumentation development efforts we find it necessary to be able to evaluate the performance of waveform digitizing systems with sampling rates from a few kilohertz to more than a gigahertz. Our goal has been to develop an integrated system which can provide quantitative results on the performance of systems and subsystems. Here we describe a system which is controlled by a Microvax II with instrumentation control through the IEEE-488 buss. The evaluation procedure is delineated in reference to a Trial Waveform Digitizer Standard generated by the Waveform Measurements and Analysis committee appointed by the Instrumentation and Measurement Society of IEEE. The standard has been recently accepted by the IEEE and will become a published standard. In this work, special focus is given to the accurate measurement of effective-bit performance and differential nonlinearity of waveform digitizers. 3 refs., 8 figs.

  20. The Center for Control, Dynamical Systems, and Computation University of California at Santa Barbara

    E-Print Network [OSTI]

    Akhmedov, Azer

    is ubiquitous in modern technological systems. This talk discusses high performance digital control algorithmsThe Center for Control, Dynamical Systems, and Computation University of California at Santa on advanced digital control for mechatronic systems, where a magnetic bearing system developed by Professor

  1. asian digital libraries: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    published in "Digital library as a controversy: Gallica vs Google, Dubrovnik : Croatia (2009)" 12;Digital library as a controversy Abstract Paris-Sud XI, Universit de...

  2. analysis digital filter: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sciences Websites Summary: . Significant im- provements have been achieved in the digital signal process- ing part of telecom systems digital filter of the analysis bank to...

  3. Born Broken: Fonts and Information Loss in Legacy Digital Documents

    E-Print Network [OSTI]

    Brown, Geoffrey; Woods, Kam

    2009-01-01T23:59:59.000Z

    ACM conference on Digital libraries, 152–161. New York, NY,joint conference on Digital libraries, 86–94. New York, NY,

  4. Digital Materiality: Preserving Access to Computers as Complete Environments

    E-Print Network [OSTI]

    2009-01-01T23:59:59.000Z

    capture information from digital media. This is but one wayof digital humanities, cyberculture, and new media, as welldigital preservation challenges presented by the media

  5. The Digital Revolution in Measurements

    SciTech Connect (OSTI)

    Kirkham, Harold

    2013-02-27T23:59:59.000Z

    This paper considers what it means to make a measurement, and the changes in measurement technology over the years. The impact of the latest changes, which have resulted in most electrical measurements being done digitally, is explored. It is argued that the process of measurement can be considered equivalent to one of data compression. The smart grid will certainly result in many more signals being made available, and therefore a great deal of data compression will be taking place. Measurements will be made in parts of the power system presently unmonitored, as well as parts that are already well covered by instrumentation. The smart grid engineer must decide what it means to have “useful” information. Unless care is taken, the signal processing may furnish information that is not useful, and may not even make sense. The paper concludes by examining the possibilities of data compression from multiple separate signals.

  6. High Sampling Rate Dynamic Inversion - Digital Signal Processing, Filter Realizations and Applications in Digital Control

    E-Print Network [OSTI]

    Chang, Herrick

    2012-01-01T23:59:59.000Z

    is the reference or disturbance frequency. q(z) is typicallyfrequency and all of its harmonics of the reference and disturbance,Gain(dB) Frequency (Hz) Error PSD ? Disturbance Rejection of

  7. Things to Consider When Upgrading a Non-Power Reactor to a Digital I&C System

    SciTech Connect (OSTI)

    Muhlheim, Michael David [ORNL] [ORNL; Hardin, LeRoy A [U.S. Nuclear Regulatory Commission] [U.S. Nuclear Regulatory Commission; Hardesty, Duane [U.S. Nuclear Regulatory Commission] [U.S. Nuclear Regulatory Commission; Wilson, Thomas L [ORNL] [ORNL

    2011-01-01T23:59:59.000Z

    Non-Power Reactor (NPR) licensees are increasing their use of state-of-the-art digital technology in instrumentation and control (I&C) systems because digital systems offer improved reactor control, information processing, and information storage. In Generic Letter GL 95-02, the NRC recognized that the design characteristics specific to the new digital electronics could result in failure modes and system malfunctions that either were not considered during the initial plant design or not evaluated in sufficient detail in the safety analysis report. These concerns include potential common mode failures. A conversion from analog to digital I&C systems in NPRs solves some problems while potentially introducing others. Good design, engineering, review, and testing can identify and minimize these risks.

  8. Directions and Maps

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Directions & Maps Plan Your Visit Visit About the Museum Museum Hours Directions & Maps When to Visit Arrange for a Visit Around Los Alamos Contact Us invisible utility element...

  9. TRADITIONAL AND DIGITAL AUTORADIOGRAPHY TECHNIQUES: A COMPARISON STUDY

    SciTech Connect (OSTI)

    Gibbs, K; Carol Kestin, C

    2006-08-29T23:59:59.000Z

    This report fulfills the FY 2006 Enhanced Surveillance Campaign Level 3 milestones for Task TSR 11.1 as defined in the execution plan [1, 2]. The purpose of this task is to reduce the cycle time necessary to complete analytical evaluations required for surveillance of reservoirs. The development of the digital autoradiography system supports this task. The digital autoradiography system is currently operational and ready for implementation in reservoir surveillance performed in the Materials Test Facility (MTF) at Savannah River Site (SRS). SRS requests design agency (Los Alamos National Laboratory and Sandia National Laboratory) concurrence for the implementation of this system and on the establishment, in conjunction with the Savannah River National Laboratory (SRNL), of the implementation requirements for this system. Stainless steel tritium reservoirs and pinch welded tubes, which have been exposed to tritium for a prolonged period, are destructively evaluated at the end of their service lives for a variety of reasons. One requirement of this evaluation is to assess the tritium diffusion into the reservoir material. The current method used to determine the geometry and depth of tritium penetration is autoradiography. This technique employs a photographic emulsion and has been effective for a number of years. The primary disadvantage of this technique is the time required to obtain results. The success of the traditional technique is dependent on many variables, such as the proficiency of the operators in conducting sample preparation, the geometry of the sample and the shelf life of the photographic chemicals. If results are not satisfactory, several repetitions are often required and usually add weeks to the total analysis time for the sample. Due to the extensive time required for the liquid emulsion autoradiography method, a new, faster technique was desired. Personnel from the Savannah River National Laboratory (SRNL) have been working on a system based on digital imaging technology to replace the current method. The purpose of this report is to provide a description of the current method, a description of the equipment for the new digital method and its capabilities, and a direct comparison of the results between the existing and proposed techniques. The advantages of the digital method is the reduced time of exposure (from 24 hours to around 10 minutes), increased sample throughput, reduced rework of samples, and the elimination of chemical processing.

  10. A digital optical phase-locked loop for diode lasers based on field programmable gate array

    SciTech Connect (OSTI)

    Xu Zhouxiang; Zhang Xian; Huang Kaikai; Lu Xuanhui [Physics Department, Zhejiang University, Hangzhou, 310027 (China)

    2012-09-15T23:59:59.000Z

    We have designed and implemented a highly digital optical phase-locked loop (OPLL) for diode lasers in atom interferometry. The three parts of controlling circuit in this OPLL, including phase and frequency detector (PFD), loop filter and proportional integral derivative (PID) controller, are implemented in a single field programmable gate array chip. A structure type compatible with the model MAX9382/MCH12140 is chosen for PFD and pipeline and parallelism technology have been adapted in PID controller. Especially, high speed clock and twisted ring counter have been integrated in the most crucial part, the loop filter. This OPLL has the narrow beat note line width below 1 Hz, residual mean-square phase error of 0.14 rad{sup 2} and transition time of 100 {mu}s under 10 MHz frequency step. A main innovation of this design is the completely digitalization of the whole controlling circuit in OPLL for diode lasers.

  11. 16-bit Digital Signal Controllers freescale.com

    E-Print Network [OSTI]

    Reisslein, Martin

    . 6 01/2007 #12;#12;56858 Technical Data, Rev. 6 Freescale Semiconductor 3 56858 Block Diagram JTAG or GPIOE IPBus Bridge (IPBB) 3 GPIOH0-H2 8 14 VDDIO 12 Decoding Peripherals IPAB IPWDB IPRDB 4 System Bus · Up to 47 GPIO #12;56858 Technical Data, Rev. 6 4 Freescale Semiconductor Part 1 Overview 1.1 56858

  12. Toward Digital Ecologies:Intelligent Agent Networks Controlling Interdependent Infrastructures

    E-Print Network [OSTI]

    Ulieru, Mihaela

    -renewable energy sources just at the time that smart grid technologies additionally permit integration of new, renewable forms of energy production into the grid (e.g., wind, solar). As demand falls and non throughout the developed world are investing in modernization of their energy grids. The SmartGrid

  13. Adaptive Tuning of Digitally Controlled Switched Mode Power Supplies

    E-Print Network [OSTI]

    Margin Jeff Morroni, Regan Zane and Dragan Maksimovi Colorado Power Electronics Center University-loop performance or loss of stability in the event of significant operating point changes associated with component and improve dynamic responses and reliability over a wider range of possible operating points. Recent work

  14. adaptive digital controllers: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mathematics Websites Summary: of Naval Re- search under Grant No. N00014-01-1-0744, Eaton Corporation, Siemens Corporate Research modifications 3; software-architecture...

  15. Improved Engine Control Strategies Enabled by Digital Signal-Processing

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport(Fact Sheet),Energy PetroleumEnergyImplementingImprove Motor Operation

  16. A digital autopilot simulator and advisory system for detecting off-nominal behavior

    E-Print Network [OSTI]

    Bae, Han-Wook

    2002-01-01T23:59:59.000Z

    , resulting in excessive jet usage and fuel consmnption. Chattering can be detected by applying a mixed-radix fast Fourier transform (FFT) algorithm to the angular rate error data. A 10-second time period is used as the window size for the FFT calculation.... TABLE OF CONTENTS CHAPTER Page I INTRODUCTION. . II TEIE DIGITAL AUTOPILOT SIMULATOR AND DYNAMICS MODEL. . . 2. 1 The Dynamic Model and State Propagation. 2. 2 The Phase Plane Controller. 2. 3 Jet Selection Logic. 2. 3. 1 Control Acceleration...

  17. Interactive Document Processing and Digital Libraries George Nagy

    E-Print Network [OSTI]

    Nagy, George

    Interactive Document Processing and Digital Libraries George Nagy Electrical, Computer and Systems explore connections between digital libraries and in- teractive document image analysis. Digital libraries in digital libraries to target problems whose solu- tion would automate, or partially automate, tasks cur

  18. Status of the NDLTD Networked Digital Library of Theses

    E-Print Network [OSTI]

    Beex, A. A. "Louis"

    Status of the NDLTD Networked Digital Library of Theses and Dissertations Gail McMillan Digital;The Networked Digital Library of Theses and Dissertations www.NDLTD.org Leader of the Worldwide ETD? · Help graduate students learn about e- publishing and digital libraries · Apply that knowledge

  19. Concurrent signal combining and channel estimation in digital communications

    DOE Patents [OSTI]

    Ormesher, Richard C. (Albuquerque, NM); Mason, John J. (Albuquerque, NM)

    2011-08-30T23:59:59.000Z

    In the reception of digital information transmitted on a communication channel, a characteristic exhibited by the communication channel during transmission of the digital information is estimated based on a communication signal that represents the digital information and has been received via the communication channel. Concurrently with the estimating, the communication signal is used to decide what digital information was transmitted.

  20. Compatibility and Interoperability Evaluation for All-digital Protection System

    E-Print Network [OSTI]

    -- compatibility, interoperability, IEC 61850, per- formance evaluation, process bus, protective relaying, relay of digital relays permit the development of an all-digital protection system. In such system, the output project titled, "Digital Protection System Using Optical Instrument Transformers and Digital Relays

  1. Some thoughts on the near-future Digital Mathematics Library

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Some thoughts on the near-future Digital Mathematics Library Thierry Bouche Université de Grenoble. The mathematicians' Digital mathematics library (DML) summarises the generous project that all mathematics ever literature is already available in some digital format, nothing looking like one digital mathematics library

  2. Workshop report: Usability of Digital Libraries @ JCDL'02 Ann Blandford

    E-Print Network [OSTI]

    Blandford, Ann

    Workshop report: Usability of Digital Libraries @ JCDL'02 Ann Blandford UCL Interaction Centre a workshop on "Usability of Digital Libraries" at JCDL'02 was the recognition that digital libraries. An interviewee in one of our earlier studies on experiences of working with digital libraries commented that "It

  3. MEDIA RELEASE FAIRFAX TO LAUNCH DIGITAL SUBSCRIPTIONS FOR

    E-Print Network [OSTI]

    Peters, Richard

    MEDIA RELEASE FAIRFAX TO LAUNCH DIGITAL SUBSCRIPTIONS FOR THE SYDNEY MORNING HERALD AND THE AGE for the first month - 6 June 2013: Fairfax Media today announced that digital subscriptions for The Sydney development to our digital strategy since Fairfax Media began producing digital content and products

  4. Intellectual Property Rights For Digital Library And Hypertext Publishing

    E-Print Network [OSTI]

    Glushko, Robert J.

    of digital media will inevitably require some adjustments in the copyright model if digital libraries only just begun ([Kahn891; [Zahr89]). DIGITAL MEDIA AND INTELLECTUAL PROPERTY LAW Elsewhere the firstIntellectual Property Rights For Digital Library And Hypertext Publishing Systems: An Analysis

  5. Digital Media and Publishing have never been closer than

    E-Print Network [OSTI]

    Digital Media and Publishing have never been closer than they are today. In 2014 we have a full slate of workshops on trending topics. NEW! Creating Digital Fiction with Kate Pullinger JUNE 9 ­ 13 An immersive writing/authoring workshop with digital fiction pioneer Kate Pullinger. Digital Publishing 101

  6. Material feedback in digital design tools

    E-Print Network [OSTI]

    Stanton, Christian J

    2009-01-01T23:59:59.000Z

    How do design tools feedback material behavior to the designer? Digital design tools in use by designers today provide a rich environment for design of form but offer little feedback of the material that ultimately realize ...

  7. Digital Construction Platform: A Compound Arm Approach

    E-Print Network [OSTI]

    Spielberg, Nathan A.

    2014-01-01T23:59:59.000Z

    We introduce a novel large-scale Digital Construction Platform (DCP) for on-site sensing, analysis, and fabrication. The DCP is an in-progress research project consisting of a compound robotic arm system comprised of a ...

  8. Digital fabrication in the architectural design process

    E-Print Network [OSTI]

    Seely, Jennifer C. K., 1975-

    2004-01-01T23:59:59.000Z

    Digital fabrication is affecting the architectural design process due to the increasingly important role it has in the fabrication of architectural models. Many design professionals, professors, and students have experienced ...

  9. MODERN AGRICULTURAL DIGITAL MANAGEMENT NETWORK INFORMATION

    E-Print Network [OSTI]

    MODERN AGRICULTURAL DIGITAL MANAGEMENT NETWORK INFORMATION SYSTEM OF HEILONGJIANG RECLAMATION AREA@126.com Abstract: To meet the need of agriculture management modernization of Heilongjiang reclamation area, further boost large-scale integration level of modern agriculture production and boost management

  10. Speech processing using digital MEMS microphones 

    E-Print Network [OSTI]

    Zwyssig, Erich Paul

    2013-11-28T23:59:59.000Z

    The last few years have seen the start of a unique change in microphones for consumer devices such as smartphones or tablets. Almost all analogue capacitive microphones are being replaced by digital silicon microphones ...

  11. Digital asset pricing in the textbook market

    E-Print Network [OSTI]

    Molina, Katherine (Katherine V.)

    2011-01-01T23:59:59.000Z

    The U.S. college textbook market is in the midst of a seismic shift: publishers are creating new products, students are demanding more sophisticated digital content and instructors are just beginning to experiment with ...

  12. Text representations in digital hypermedia library systems 

    E-Print Network [OSTI]

    Lokken, Sveinung Taraldsrud

    1993-01-01T23:59:59.000Z

    The advent of the digital library poses a great number of challenging research questions in the areas of hypermedia, computer-human interaction, information retrieval, and information science. Choosing a representation for text converted from...

  13. Mobile retrospective : shrinking the digital divide

    E-Print Network [OSTI]

    McLean, David Bruce, 1975-

    2003-01-01T23:59:59.000Z

    The concept of the digital divide is a condition in the urban context where informationalization via computer technology exacerbates a duality that consists of those who have access to information technologies, and those ...

  14. GE's Digital Marketplace to Revolutionize Manufacturing | GE...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    when the product is in use. The digital thread is the seamless flow of data across the product lifecycle. Today, very little data is transferred from end to end of the...

  15. Digital Backpropagation in the Nonlinear Fourier Domain

    E-Print Network [OSTI]

    Wahls, Sander; Prilepsky, Jaroslaw E; Poor, H Vincent; Turitsyn, Sergei K

    2015-01-01T23:59:59.000Z

    Nonlinear and dispersive transmission impairments in coherent fiber-optic communication systems are often compensated by reverting the nonlinear Schr\\"odinger equation, which describes the evolution of the signal in the link, numerically. This technique is known as digital backpropagation. Typical digital backpropagation algorithms are based on split-step Fourier methods in which the signal has to be discretized in time and space. The need to discretize in both time and space however makes the real-time implementation of digital backpropagation a challenging problem. In this paper, a new fast algorithm for digital backpropagation based on nonlinear Fourier transforms is presented. Aiming at a proof of concept, the main emphasis will be put on fibers with normal dispersion in order to avoid the issue of solitonic components in the signal. However, it is demonstrated that the algorithm also works for anomalous dispersion if the signal power is low enough. Since the spatial evolution of a signal governed by the ...

  16. Digital holographic imaging of aquatic species

    E-Print Network [OSTI]

    Domínguez-Caballero, José Antonio

    2006-01-01T23:59:59.000Z

    The aim of this thesis is to design, develop and implement a digital holographic imaging (DHI) system, capable of capturing three-dimensional (3D) images of aquatic species. The images produced by this system are used in ...

  17. The Digital Divide: It's the Content Stupid 

    E-Print Network [OSTI]

    Guadamuz, Andres

    2005-01-01T23:59:59.000Z

    The article examines the notion of the digital divide, not purely from physical access to the Internet, but from availability to online content. It focusses particularly on concerns held by developing countries, and of ...

  18. Digital imaging tracing technology for print media

    E-Print Network [OSTI]

    Milne, Stewart William

    1997-01-01T23:59:59.000Z

    This thesis examines and analyzes the existing state of digital technology use in print media and the attitudes of those using the technology to develop a technology that would help prevent the unethical manipulation of images in mass media...

  19. The addition of multichannel analog-to-digital conversion capability to a minicomputer facility

    E-Print Network [OSTI]

    Malek-Shahmirzadi, Homayoun

    1972-01-01T23:59:59.000Z

    diagram. The multichannel analog-to-digital conversion system is intended to be used in conjunction with the Hewlett-Packard 2114B digital computer system to help in solving some of the problem areas in sampling theory, control theory, and biomedical... buffer exchanges. The input/output requests perform status checking of the standard I/O devices, data recording on the magnetic tape re- corder (MT) unit, and message printing on the teletype (TTY). Hewlett-Packard Software Interface The HP computers...

  20. Digital electronic bone growth stimulator

    DOE Patents [OSTI]

    Kronberg, J.W.

    1993-01-01T23:59:59.000Z

    The present invention relates to the electrical treatment of biological tissue. In particular, the present invention discloses a device that produces discrete electrical pulse trains for treating osteoporosis and accelerating bone growth. According to its major aspects and broadly stated, the present invention consists of an electrical circuit configuration capable of generating Bassett-type waveforms shown with alternative signals provide for the treatment of either fractured bones or osteoporosis. The signal generator comprises a quartz clock, an oscillator circuit, a binary divider chain, and a plurality of simple, digital logic gates. Signals are delivered efficiently, with little or no distortion, and uniformly distributed throughout the area of injury. Perferably, power is furnished by widely available and inexpensive radio batteries, needing replacement only once in several days. The present invention can be affixed to a medical cast without a great increase in either weight or bulk. Also, the disclosed stimulator can be used to treat osteoporosis or to strengthen a healing bone after the cast has been removed by attaching the device to the patient`s skin or clothing.

  1. Digital Music Research UK Roadmap www.dmrn.org/roadmap Developed by the Digital Music Research Network 1

    E-Print Network [OSTI]

    Miranda, Eduardo Reck

    Digital Music Research ­ UK Roadmap www.dmrn.org/roadmap Developed by the Digital Music Research ­ UK Roadmap www.dmrn.org/roadmap Developed by the Digital Music Research Network 2 includes weightings are. Neither is it #12;Digital Music Research ­ UK Roadmap www.dmrn.org/roadmap Developed

  2. Analog circuit for controlling acoustic transducer arrays

    DOE Patents [OSTI]

    Drumheller, Douglas S. (Cedar Crest, NM)

    1991-01-01T23:59:59.000Z

    A simplified ananlog circuit is presented for controlling electromechanical transducer pairs in an acoustic telemetry system. The analog circuit of this invention comprises a single electrical resistor which replaces all of the digital components in a known digital circuit. In accordance with this invention, a first transducer in a transducer pair of array is driven in series with the resistor. The voltage drop across this resistor is then amplified and used to drive the second transducer. The voltage drop across the resistor is proportional and in phase with the current to the transducer. This current is approximately 90 degrees out of phase with the driving voltage to the transducer. This phase shift replaces the digital delay required by the digital control circuit of the prior art.

  3. Optimization Online - Efficient Direct Multiple Shooting for Nonlinear ...

    E-Print Network [OSTI]

    Christian Kirches

    2011-05-31T23:59:59.000Z

    May 31, 2011 ... Efficient Direct Multiple Shooting for Nonlinear Model Predictive Control on Long Horizons. Christian Kirches (christian.kirches ***at*** ...

  4. Sandia National Laboratories: Grand Challenge Laboratory-Directed...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Grand Challenge Laboratory-Directed Research and Development project Recent Sandia Secure, Scalable Microgrid Advanced Controls Research Accomplishments On March 3, 2015, in...

  5. Direct-Write of Silicon and Germanium Nanostructures

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    They have demonstrated the ability to directly "write" nanostructures of Si, Ge, and SiGe with deterministic size, geometry, and placement control. As purity is essential for...

  6. Abstract--The Digital Ecosystem (DES) paradigm and consequently Digital Business Ecosystems (DBE) are powerful

    E-Print Network [OSTI]

    Ricci, Francesco

    Abstract-- The Digital Ecosystem (DES) paradigm and consequently Digital Business Ecosystems (DBE) are powerful emerging inter-company cooperative structures. One of the main advantages of an ecosystem companies of the ecosystem is an essential binding element among them. The intention of this paper

  7. Digital Background Calibration of an Algorithmic Analog-to-Digital Converter

    E-Print Network [OSTI]

    Hurst, Paul J.

    one sample-and-hold amplifier. At a sampling rate of 20 Msamples/s, the peak signal-to-noise-effective design of high-performance analog-to-digital converters with low-performance op amps. In this paper analog-to-digital converter (ADC). To minimize power dissipation and noise, the queue consists of only

  8. Digital Sofcell Digital Ultracap joint venture | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluating A Potential Microhydro SiteDaytonDestilaria detheDiebu

  9. Digital Ultracap Corp formerly Digital Ultracap LLC | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluating A Potential Microhydro SiteDaytonDestilaria detheDiebuOpen

  10. Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualPropertyd8c-a9ae-f8521cbb8489 No revision hasda62829c05bGabbs TypeWinds Wind Farm8)DifwindV'02-

  11. The change in risk due to upgrade to a digital reactor protection system

    SciTech Connect (OSTI)

    Ostrom, L.T.; Galyean, W.J.; Wilhelmsen, C.A.; Haney, L.N. [Idaho National Engineering Lab., Idaho Falls, ID (United States)

    1994-10-01T23:59:59.000Z

    The United States Nuclear Regulatory Commission (NRC) is sponsoring the Idaho National Engineering Laboratory (INEL) to study the risk impact of the upgrade of commercial nuclear power plants (NPPs) from analog to digital instrumentation. It was decided to use a limited probabilistic risk assessment (PRA) methodology to assess the risk impact due to the implementation of digital control systems. The human reliability analysis (HRA)/PRA analysis was to be a pre- and post-upgrade comparison to determine the change in risk. A candidate NPP was selected as the initial step in the analysis process. The selection process entailed reviewing the literature to identify NPPs that had undergone a modification in which a digital control system (DCS) replaced an analog control system. Preference was given to plants where the DCS controlled safety systems. Several NPPs were considered for the candidate plant. The NPP was selected primarily because: (1) it had replaced its existing analog control system with the Westinghouse Eagle-21 Process Protection System (Eagle-21); (2) it had several years experience with the DCS; and (3) the NPP`s management demonstrated a willingness to support the project.

  12. Direct/Indirect Costs

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1997-03-28T23:59:59.000Z

    This chapter provides recommended categories for direct and indirect elements developed by the Committee for Cost Methods Development (CCMD) and describes various estimating techniques for direct and indirect costs.

  13. Direct Loan Program (Connecticut)

    Broader source: Energy.gov [DOE]

    The Connecticut Development Authority’s Direct Loan Program provides direct senior and subordinated loans and mezzanine investments to companies creating or maintaining jobs. Up to $20,000 per job...

  14. Directives System Manual

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1998-01-30T23:59:59.000Z

    This Manual provides detailed requirements to supplement DOE O 251.1A, Directives System, dated 1-30-98.

  15. Optimization Digital Image Watermarking Technique for Patent Protection

    E-Print Network [OSTI]

    Elnajjar, Mahmoud; Zaidan, B B; Sharif, Mohamed Elhadi M; Alanazi, Hamdan O

    2010-01-01T23:59:59.000Z

    The rapid development of multimedia and internet allows for wide distribution of digital media data. It becomes much easier to edit, modify and duplicate digital information besides that, digital documents are also easy to copy and distribute, therefore it will be faced by many threats. It is a big security and privacy issue. Another problem with digital document and video is that undetectable modifications can be made with very simple and widely available equipment, which put the digital material for evidential purposes under question With the large flood of information and the development of the digital format, it become necessary to find appropriate protection because of the significance, accuracy and sensitivity of the information, therefore multimedia technology and popularity of internet communications they have great interest in using digital watermarks for the purpose of copy protection and content authentication. Digital watermarking is a technique used to embed a known piece of digital data within a...

  16. Video Monitoring and Control of the LENS Process

    SciTech Connect (OSTI)

    HOFMEISTER,WILLIAM; KNOROVSKY,GERALD A.; MACCALLUM,DANNY O.

    1999-11-30T23:59:59.000Z

    The LENS (Laser Engineered Net Shaping) process has significant potential impact to the manufacturing community in producing near-net shape rapid prototypes, tooling and customized small lot parts. LEINS has its roots in stereolithography and weld surfacing. Parts are built up in layers by delivering powder carried in an inert gas stream directed via nozzles to a laser-produced molten pool. A robust implementation of this technology requires a thorough understanding of how the thermal history during part fabrication influences the dimensions, microstructure and properties of the part. This understanding, in combination with effective closed loop feedback control of the process, and modeling of the part to be formed, is required to ensure routine fabrication of components with appropriate properties Thermal behavior at high temperatures (above 800 C) can be readily monitored by visible light radiation pyrometry. In this work a high speed digital camera with a narrow bandpass optical filter was used to obtain thermal images of the LENS process zone. The thermal imaging system was incorporated into the optical path of the laser so that the melt pool and adjacent areas of the part could be monitored without intrusive hardware add-ens at the lens/powder nozzle/process zone vicinity. The output of the digital camera was collected by a fiarne grabber card in a personal computer (PC). Characteristics of the melt pool were evaluated and then used as inputs to a Proportional-Integral-Derivative (PID) control algorithm also running on the PC. The output of the PID algorithm was then used to control the laser power. Running the closed loop control resulted in significant stabilization of the melt pool size during simulated fabrication experiments. We will describe the equipment, algorithms, experiments and results obtained from LENS-formed simple shapes of 316 Stainless Steel.

  17. Topaz-II reactor control unit development

    SciTech Connect (OSTI)

    Wyant, F.J.; Jensen, D.; Logothetis, J.

    1994-12-31T23:59:59.000Z

    The development for a new digital reactor control unit for the Topaz-II reactor is described. The unit is expected to provide the means for automated control during a possible Topaz flight experiment. The breadboard design and development is discussed.

  18. Software digitizer for high granular gaseous detector

    E-Print Network [OSTI]

    Y. Haddad; M. Ruan; V. Boudry

    2014-05-06T23:59:59.000Z

    A sampling calorimeter equipped with gaseous sensor layers with digital readout is near perfect for "Particle Flow Algorithm" approach, since it is homogeneous over large surfaces, robust, cost efficient, easily segmentable to any readout pad dimension and size and almost insensitive to neutrons. The response of a finely segmented digital calorimeter is characterized by track efficiency and multiplicity. Monte Carlo (MC) programs such as GEANT4 simulate with high precision the energy deposited by particles. The sensor and electronic response associated to a pad are calculated in a separate "digitization" process. We developed a general method for simulating the pad response, a digitization, reproducing efficiency and multiplicity, using the spatial information from a simulation done at higher granularity. The digitization method proposed here has been applied to gaseous detectors including Glass Resistive Plate Chambers (GRPC) and MicroMegas. Validating the method on test beam data, experimental observables such as efficiency, multiplicity and mean number of hits at different thresholds have been reproduced with high precision.

  19. Government Information in the Digital Age: The Once and Future Federal Depository Library Program

    E-Print Network [OSTI]

    Jacobs, James A; Jacobs, James R; Yeo, Shinjoung

    2005-01-01T23:59:59.000Z

    of California’s California Digital Library (CDL) “has beenstored in separate digital library collections, fromat the California Digital Library summed up the preservation

  20. When use cases are not useful: Data practices, astronomy, and digital libraries

    E-Print Network [OSTI]

    Wynholds, Laura; Fearon, David; Borgman, Christine L; Traweek, Sharon

    2011-01-01T23:59:59.000Z

    joint conference on digital libraries, ACM (2010), 283–C.L. , and Pepe, A. Digital libraries for scientific datajoint conference on Digital libraries, ACM (2010), 333-340.