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Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
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1

THE ROLE OF DIRECT DIGITAL CONTROLS IN COMMERCIAL BUILDINGS 1 Scholarly Report  

E-Print Network (OSTI)

THE ROLE OF DIRECT DIGITAL CONTROLS IN COMMERCIAL BUILDINGS 1 Digital Controls in Commercial Buildings Jonathan Kumi Civil Systems ........................................................................................................................................... 3 II. Introduction to Building Controls

Austin, Mark

2

Adaptive optimal control: an algorithm for direct digital control  

SciTech Connect

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.

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

1980-01-01T23:59:59.000Z

3

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

E-Print Network (OSTI)

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...

Swanson, K.

4

Digital Surveying Directional Surveying Specialists | Open Energy  

Open Energy Info (EERE)

Digital Surveying Directional Surveying Specialists Digital Surveying Directional Surveying Specialists Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Digital Surveying Directional Surveying Specialists Author Directional Surveying Specialists Published Publisher Not Provided, 2012 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Digital Surveying Directional Surveying Specialists Citation Directional Surveying Specialists. Digital Surveying Directional Surveying Specialists [Internet]. 2012. [cited 2013/10/08]. Available from: http://www.digitalsurveying.co.za/services/geophysical-borehole-surveying/overview/optical-televiewer/ Retrieved from "http://en.openei.org/w/index.php?title=Digital_Surveying_Directional_Surveying_Specialists&oldid=690244"

5

Lighting Group: Controls: Advanced Digital Controls  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Digital Controls Advanced Digital Controls HPCBS Advanced Digital Controls Objective The goal of this project is to hasten the adoption of digital lighting control systems to allow commercial building operators to optimize the neergy performance of their lighting systems, implement demand responsive control, and improve occupant comfort and productivity. The specific objectives are as follows: (1) Advance the adoption of digital lighting control systems by working with industry to embed IBECS technology into existing analog control and DALI products, and by developing compelling demonstrations of digital control systems for evaluation by early adopters. (2) In collaboration with equipment manufacturers, produce digital lighting system prototypes that demonstrate the advantages of digitally controlled lighting systems to innovative property managers and other energy stakeholders. A digitally controlled lighting system consists of lights that are individually controllable via a network. The advantages of digital control are:

6

Digital control of HVDC converters  

SciTech Connect

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.

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

1989-05-01T23:59:59.000Z

7

Digital Control for Automation  

Science Journals Connector (OSTI)

GREATER YIELDS OF BETTER QUALITY PRODUCTS at reduced costs: That's one way to look at automations goal. And among instruments for automation are data reduction systems (others: continuous process analyzers, computer elements, and control mechanisms). ...

1956-04-02T23:59:59.000Z

8

Digital Control Computers In Analytical Chemistry  

Science Journals Connector (OSTI)

Digital Control Computers In Analytical Chemistry ... Time-Sharing Minicomputer Data Acquisition-Processing System ... Automation of organic elemental analysis ...

Jack W. Frazer

1968-07-01T23:59:59.000Z

9

From Packet to Power Switching: Digital Direct Load Scheduling  

E-Print Network (OSTI)

At present, the power grid has tight control over its dispatchable generation capacity but a very coarse control on the demand. Energy consumers are shielded from making price-aware decisions, which degrades the efficiency of the market. This state of affairs tends to favor fossil fuel generation over renewable sources. Because of the technological difficulties of storing electric energy, the quest for mechanisms that would make the demand for electricity controllable on a day-to-day basis is gaining prominence. The goal of this paper is to provide one such mechanisms, which we call Digital Direct Load Scheduling (DDLS). DDLS is a direct load control mechanism in which we unbundle individual requests for energy and digitize them so that they can be automatically scheduled in a cellular architecture. Specifically, rather than storing energy or interrupting the job of appliances, we choose to hold requests for energy in queues and optimize the service time of individual appliances belonging to a broad class whi...

Alizadeh, Mahnoosh; Thomas, Robert J

2012-01-01T23:59:59.000Z

10

A New Digital Lighting Control System  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Digital Lighting Control System A New Digital Lighting Control System Speaker(s): Charles Knuffke Date: June 29, 2010 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Francis Rubinstein When various Lighting Controls components are discussed, they're usually slotted into separate "silos" - Occupancy Sensors, Relay Panels, Dimming Controls, and Daylighting Controls. Trying to combine two or more of these into a single system usually requires a fair amount of technical expertise and often help from different manufacturers. Combine that with the need under LEED to get these systems commissioned, often without detailed sequence of operation information, and that helps to explains why many view Lighting Controls as overly complex. And try to integrate the Lighting Controls into a larger overall building management system so their

11

Digital gate pulse generator for cycloconverter control  

DOE Patents (OSTI)

The present invention provides a digital gate pulse generator which controls the output of a cycloconverter used for electrical power conversion applications by determining the timing and delivery of the firing pulses to the switching devices in the cycloconverter. Previous gate pulse generators have been built with largely analog or discrete digital circuitry which require many precision components and periodic adjustment. The gate pulse generator of the present invention utilizes digital techniques and a predetermined series of values to develop the necessary timing signals for firing the switching device. Each timing signal is compared with a reference signal to determine the exact firing time. The present invention is significantly more compact than previous gate pulse generators, responds quickly to changes in the output demand and requires only one precision component and no adjustments.

Klein, Frederick F. (Monroeville, PA); Mutone, Gioacchino A. (Pleasant Hills, PA)

1989-01-01T23:59:59.000Z

12

A Framework for Flexible Access Control in Digital Library Systems  

E-Print Network (OSTI)

to merely control access to documents local to the digital library. The access control policies are often called DACM (Document Access Control Methods). The basic idea is geared toward discretionary accessA Framework for Flexible Access Control in Digital Library Systems Indrajit Ray and Sudip

Ray, Indrajit

13

IEEE POWER ELECTRONICS LETTERS, VOL. 2, NO. 2, JUNE 2004 51 Digital Phase Control for Resonant Inverters  

E-Print Network (OSTI)

. In this letter, we present and verify a new concept for direct digital phase control of resonant invertersIEEE POWER ELECTRONICS LETTERS, VOL. 2, NO. 2, JUNE 2004 51 Digital Phase Control for Resonant Inverters Yan Yin, Student Member, IEEE, and Regan Zane, Member, IEEE Abstract--This letter presents

14

Distributed digital real-time control system for TCV tokamak  

Science Journals Connector (OSTI)

Abstract A new digital feedback control system (named the SCD “Systčme de Contrôle Distribué”) has been developed, integrated and used successfully to control TCV (Tokamak ŕ Configuration Variable) plasmas. The system is designed to be modular, distributed, and scalable, accommodating hundreds of diagnostic inputs and actuator outputs. With many more inputs and outputs available than previously possible, it offers the possibility to design advanced control algorithms with better knowledge of the plasma state and to coherently control all TCV actuators, including poloidal field (PF) coils, gas valves, the gyrotron powers and launcher angles of the electron cyclotron heating and current drive system (ECRH/ECCD) together with diagnostic triggering signals. The system consists of multiple nodes; each is a customised Linux desktop or embedded PC which may have local ADC and DAC cards. Each node is also connected to a memory network (reflective memory) providing a reliable, deterministic method of sharing memory between all nodes. Control algorithms are programmed as block diagrams in Matlab-Simulink providing a powerful environment for modelling and control design. The C code is generated automatically from the Simulink block diagram and compiled, with the Simulink Embedded Coder (SEC, formerly Real-Time Workshop Embedded Coder), into a Linux shared library (“.so” file) and distributed to target nodes in the discharge preparation phase. During the TCV discharge, an application on each node is executed that dynamically loads the shared library at runtime. In order to obtain reliable and reproducible real time execution of the algorithm, all interrupts to the CPU on each node are suspended just before firing the shot and re-enabled afterwards. Since installation, the new digital control system has been used for a multitude of plasma control applications, ranging from basic experiments of coil current and density control to advanced experiments of MHD (magnetohydrodynamics) and plasma profile control, as well as real-time plasma transport simulations. Recently, a real-time version of a plasma equilibrium reconstruction code was developed and implemented, providing the future possibility to control the plasma shape and profiles directly during the discharge evolution. This paper presents the architecture of the new control system, its integration into the TCV plant and a sample of control applications used for TCV plasma discharges.

H.B. Le; F. Felici; J.I. Paley; B.P. Duval; J.-M. Moret; S. Coda; O. Sauter; D. Fasel; P. Marmillod

2014-01-01T23:59:59.000Z

15

A Novel ROM-less Direct Digital Frequency SynthesizerBased on Chebyshev Polynomial Interpolation  

E-Print Network (OSTI)

A Novel ROM-less Direct Digital Frequency SynthesizerBased on Chebyshev Polynomial Interpolation I(DDFS), Chebyshev Polynomials,Phase-to-Sinemapping. 4 n: gI I Abstract - In this paper a novel ROM-less Direct. ":. ROM -.tf. DAC -'L $ 1 I I I. INTRODUCTION Direct Digital Frequency Synthesizers (DDFS) have been used

Ashrafi, Ashkan

16

Digital plasma control system and Alcasim simulation code for Alcator C-Mod  

E-Print Network (OSTI)

Abstract The Alcator C-Mod control system was upgraded to digital architecture DPCS (Digital Plasma Control System). The main features of the digital system are the high flexibility, robustness and maintainability. The ...

Ferrara, Marco, Ph. D. Massachusetts Institute of Technology

2005-01-01T23:59:59.000Z

17

Digital Mapping Of Structurally Controlled Geothermal Features With GPS  

Open Energy Info (EERE)

Digital Mapping Of Structurally Controlled Geothermal Features With GPS Digital Mapping Of Structurally Controlled Geothermal Features With GPS Units And Pocket Computers Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Digital Mapping Of Structurally Controlled Geothermal Features With GPS Units And Pocket Computers Abstract Hand-held global positioning system (GPS) units and pocket personal computers (PCs) were used to map surface geothermal features at the Bradys Hot Springs and Salt Wells geothermal systems, Churchill County, Nevada, in less time and with greater accuracy than would have been possible with conventional mapping methods. Geothermal features that were mapped include fumaroles, mud pots, warm ground, sinter, and a variety of silicified rocks. In both areas, the digital mapping was able to resolve structural

18

Digital Mapping Of Structurally Controlled Geothermal Features With Gps  

Open Energy Info (EERE)

Digital Mapping Of Structurally Controlled Geothermal Features With Gps Digital Mapping Of Structurally Controlled Geothermal Features With Gps Units And Pocket Computers Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Digital Mapping Of Structurally Controlled Geothermal Features With Gps Units And Pocket Computers Details Activities (1) Areas (1) Regions (0) Abstract: Hand-held global positioning system (GPS) units and pocket personal computers (PCs) were used to map surface geothermal features at the Bradys Hot Springs and Salt Wells geothermal systems, Churchill County, Nevada, in less time and with greater accuracy than would have been possible with conventional mapping methods. Geothermal features that were mapped include fumaroles, mud pots, warm ground, sinter, and a variety of silicified rocks. In both areas, the digital mapping was able to resolve

19

Performance of digital pheromones for swarming vehicle control  

Science Journals Connector (OSTI)

The use of digital pheromones for controlling and coordinating swarms of unmanned vehicles is studied under various conditions to determine their effectiveness in multiple military scenarios. The study demonstrates the effectiveness of these pheromone ... Keywords: autonomous vehicles, multiagent, pheromone control, swarming

John A. Sauter; Robert Matthews; H. Van Dyke Parunak; Sven A. Brueckner

2005-07-01T23:59:59.000Z

20

HVDC control system based on parallel digital signal processors  

SciTech Connect

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.

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

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

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

E-Print Network (OSTI)

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...

Hockenbury, W. D.

1982-01-01T23:59:59.000Z

22

Digital regulation of a phase controlled power converter  

SciTech Connect

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.

Schultheiss, C.; Haque, T.

1995-12-01T23:59:59.000Z

23

MIT Department of Nuclear Engineering 1 Digital Instrumentation and Control  

E-Print Network (OSTI)

1 MIT Department of Nuclear Engineering 1 Digital Instrumentation and Control Issues in Nuclear Engineering 2 Nuclear Power Plant #12;2 MIT Department of Nuclear Engineering 3 Major Protection Functions Engineering 4 Background · Analog electro-mechanical systems in existing nuclear power plants are aging

Schweik, Charles M.

24

Task Force on Digital Directions in the Humanities  

E-Print Network (OSTI)

partner with researchers in creating and sustaining scholarship through its development of KU ScholarWorks, Journals@KU, Luna Insight image collections, and digital publishing services. The Libraries are committed to serving KU to advance humanistic.... Libraries Isidro Rivera, Spanish and Portuguese Jon Giullian, Libraries Jonathan Perkins, EGARC Mark Reaney, Theatre Marsha Haufler, History of Art Maryemma Graham, English Nancy Baym, Communication Studies Rick McMullen, Research and Graduate...

Hanson, F. Allan; Ludwig, Deborah

2010-03-02T23:59:59.000Z

25

Digitally Controlled High Availability Power Supply  

SciTech Connect

This paper will report on the test results of a prototype 1320 watt power module for a high availability power supply. The module will allow parallel operation for N+1 redundancy with hot swap capability. The two quadrant output of each module allows pairs of modules to provide a 4 quadrant (bipolar) operation. Each module employs a novel 4 FET buck regulator arranged in a bridge configuration. Each side of the bridge alternately conducts through a small saturable ferrite that limits the reverse current in the FET body diode during turn off. This allows hard switching of the FETs with low switching losses. The module is designed with over-rated components to provide high reliability and better then 97% efficiency at full load. The modules use a Microchip DSP for control, monitoring, and fault detection. The switching FETS are driven by PWM modules in the DSP at 60 KHz. A Dual CAN bus interface provides for low cost redundant control paths. The DSP will also provide current sharing between modules, synchronized switching, and soft start up for hot swapping. The input and output of each module have low resistance FETs to allow hot swapping and isolation of faulted units.

MacNair, David; /SLAC

2009-05-07T23:59:59.000Z

26

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

SciTech Connect

The potential for disruption of safety-related digital instrumentation and control (I&C) systems by electromagnetic interference/radio-frequency interference (EMI/RFI) bears directly on the safe operation of advanced reactors. It is anticipated that the use of digital I&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&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&C systems of advanced reactors. 16 refs., 2 figs., 3 tabs.

Kercel, S.W.; Korsah, K.; Wood, R.T. [Oak Ridge National Lab., TN (United States)

1997-12-01T23:59:59.000Z

27

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

SciTech Connect

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.

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

1997-10-01T23:59:59.000Z

28

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...

29

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

SciTech Connect

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.

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

2012-08-01T23:59:59.000Z

30

Impact of Smoke Exposure on Digital Instrumentation and Control  

SciTech Connect

Smoke can cause interruptions and upsets in active electronics. Because nuclear power plants are replacing analog with digital instrumentation and control systems, qualification guidelines for new systems are being reviewed for severe environments such as smoke and electromagnetic interference. Active digital systems, individual components, and active circuits have been exposed to smoke in a program sponsored by the U.S. Nuclear Regulatory Commission. The circuits and systems were all monitored during the smoke exposure, indicating any immediate effects of the smoke. The results of previous smoke exposure studies have been reported in various publications. The major immediate effect of smoke has been to increase leakage currents and to cause momentary upsets and failures in digital systems. This paper presents new results from conformal coatings, memory chips, and hard drive tests.The best conformal coatings were found to be polyurethane, parylene, and acrylic (when applied by dipping). Conformal coatings can reduce smoke-induced leakage currents and protect against metal loss through corrosion. However conformal coatings are typically flammable, so they do increase material flammability. Some of the low-voltage biased memory chips failed during a combination of high smoke and high humidity. Typically, smoke along with heat and humidity is expected during fire, rather than smoke alone. Thus, due to high sensitivity of digital circuits to heat and humidity, it is hypothesized that the impact of smoke may be secondary.Low-voltage (3.3-V) static random-access memory (SRAMs) were found to be the most vulnerable to smoke. Higher bias voltages decrease the likelihood of failure. Erasable programmable read-only memory (EPROMs) and nonvolatile SRAMs were very smoke tolerant. Failures of the SRAMs occurred when two conditions were present: high density of smoke and high humidity. As the high humidity was present for only part of the test, the failures were intermittent. All of the chips that failed during the test recovered after enough venting.Hard disks were tested in severe environments but did not fail during the 2 h of monitoring.While the results of the tests documented in this report confirm that digital circuits can indeed be vulnerable to smoke, there is currently no practical, repeatable testing methodology, so it is not feasible to assess smoke susceptibility as part of environmental qualification. As a result, the most reasonable approach to minimizing smoke susceptibility is to employ design, implementation, and procedural practices that can reduce the possibility of smoke exposure and enhance smoke tolerance. Traditional approaches to mitigate its effects in digital safety instrumentation and control, such as redundancy, separation, defense in depth, as well as adherence to standards (e.g., the Institute of Electrical and Electronics Engineers' IEEE 384) and the Code of Federal Regulations Appendix R of 10 CFR 50, should continue to be applied.

Tanaka, Tina J. [Sandia National Laboratories (United States); Nowlen, Steven P. [Sandia National Laboratories (United States); Korsah, Kofi [Oak Ridge National Laboratory (United States); Wood, Richard T. [Oak Ridge National Laboratory (United States); Antonescu, Christina E. [U.S. Nuclear Regulatory Commission (United States)

2003-08-15T23:59:59.000Z

31

E-Print Network 3.0 - adaptive digital controllers Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

using a microprocessor, a simple serial output device... To better understand digital logic and controllers, as well as simple serial protocol, a simple circuit... was developed....

32

Digitally Controlled Wide Range Pulse Width Modulator for On-Chip Power Supplies  

E-Print Network (OSTI)

of the inverters This research is supported in part by the New York State Office of Science, TechnologyDigitally Controlled Wide Range Pulse Width Modulator for On-Chip Power Supplies Selc¸uk K Rochester, New York 14627 fvaisband, friedmang@ece.rochester.edu Abstract-- A digitally controlled current

Friedman, Eby G.

33

Direct Digital Control in Air Conditioning Systems for Energy Efficiency  

E-Print Network (OSTI)

the function and the level of the building, but also save energy. At present, air-conditioning design in internal commercial buildings is becoming more complex and enormous. The proportion of air conditioning systems in the whole building is getting larger...

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

2006-01-01T23:59:59.000Z

34

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

Energy.gov (U.S. Department of Energy (DOE))

A new approach for wideband O2 sensor control that treats a pump-cell sensor not as a feedback controlled system, but as the Ťanalog? front-end of a modified Delta-Sigma analog-to-Digital Converter

35

Four Phase Switched Reluctance Motor Direct Torque Control  

Science Journals Connector (OSTI)

The three-phase switched reluctance motor direct torque control method mostly is a simple transplantation of the three-phase AC asynchronous motor direct torque control method, not suitable for arbitrary-phase switched reluctance motor. In this paper, ... Keywords: SRM, Direct torque control, Flux vector, Voltage vector, Switched rule

Wang Mianhua

2011-01-01T23:59:59.000Z

36

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

E-Print Network (OSTI)

and overflow detection logic. . . . . 19 . 21 . . 22 13. Generation of CONPARE-OK signal from A B OUTPUT signal. . . . . . . 24 14. Decoding logic for the six control functions. . . . . 26 15. Logic for motor relay drivers. . 28 16. Logic for the control... function lamp drivers. . 17a, b. Typical lamp and relay drivers. . 30 18. The digital controller and the display box mounted on the wheelchair . . 32 19. Schematic diagram of the digital-to-analog converter. . . . . 33 20. Physical construction...

Edwards, David Fredrick

2012-06-07T23:59:59.000Z

37

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

E-Print Network (OSTI)

Design of optimal digital controller for stable super-high-speed permanent-magnet synchronous motor collaborative design scheme of a super-high-speed permanent-magnet synchronous motor (PMSM) and its digital is an attractive solution for super-high-speed PMSMs because of its inherent lack of mechanical shaft sensors

Wu, Thomas

38

A comparative study of specification models for autonomic access control of digital rights  

Science Journals Connector (OSTI)

One of the goals of Digital Rights Management Systems is the provision of a flexible access rights management system to specify and enforce digital rights. Policy-based access control is an important feature of flexible access management systems as it ...

K. Bhoopalam; K. Maly; R. Mukkamala; M. Zubair; D. Agrawal; D. Kaminsky

2005-10-01T23:59:59.000Z

39

Remote control digital photography and metrology are combined to accurately define optical efficiency  

E-Print Network (OSTI)

Remote control digital photography and metrology are combined to accurately define optical, sag from the weight of the heat transfer fluid and the tube itself, or change in the structure over

40

Capital controls and foreign direct investment  

E-Print Network (OSTI)

This paper examines the effect of three types of capital control policies on FDI (a) the existence of multiple exchange rates; (b) restrictions on capital account, and (c) restrictions on the repatriation of export proceeds. ...

Asiedu, Elizabeth; Lien, Donald

2004-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Definition: Direct Load Control Device | Open Energy Information  

Open Energy Info (EERE)

Load Control Device Load Control Device Jump to: navigation, search Dictionary.png Direct Load Control Device A remotely controllable switch that can turn power to a load or appliance on or off. Such a device could also be used to regulate the amount of power that a load can consume. Direct load control devices can be operated by a utility or third party energy provider to reduce a customer's energy demand at certain times.[1] Related Terms power, load References ↑ https://www.smartgrid.gov/category/technology/direct_load_control_device [[Ca LikeLike UnlikeLike You like this.Sign Up to see what your friends like. tegory: Smart Grid Definitionssmart grid,smart grid, |Template:BASEPAGENAME]]smart grid,smart grid, Retrieved from "http://en.openei.org/w/index.php?title=Definition:Direct_Load_Control_Device&oldid=502631

42

Torque ripple minimization of axial laminations switched reluctance motor provided with digital lead controller  

Science Journals Connector (OSTI)

The switched reluctance motor (SRM) has great potential as an adjustable speed application due to its outstanding merits. One of the major problems is torque ripple which causes increased undesirable acoustic noise and possibly speed ripple. This paper investigates the application of a digital lead controller to the axial laminations switched reluctance motor (ALSRM) for the purpose of minimizing its torque ripples. The dynamic response of the ALSRM with the proposed controller is analyzed. The effectiveness of the proposed digital lead controller is then compared with that of the conventional PI controller.

Hany M. Hasanien; S.M. Muyeen; Junji Tamura

2010-01-01T23:59:59.000Z

43

Isolated digitally controlled voltage mode forward converter with excellent audio rejection  

Science Journals Connector (OSTI)

This paper presents the implementation of feedforward in digital domain to meet the audio susceptibility as per MIL STD 461C for voltage mode digitally controlled DC-DC converters. The feed-forward is accomplished through the estimation of duty ratio based on the input voltage at every switching cycle. The prototype converter developed is having galvanic isolation in the forward and feedback path and is based on single ended forward topology. An optimised discrete controller is provided in the feedback path to achieve desired dynamic performance. The feed forward scheme was implemented along with discrete feedback controller using a 16-bit fixed point microcontroller. The design of optimised discrete compensator and the audio rejection of a converter with such a feedback controller are presented. The simulation model of the converter with proposed digital feed forward/feedback controller using SIMULINK and its results against input disturbances are also presented. Experimental results are presented in this paper to validate the theoretical analysis.

M.G. Rajesh Kumar; G. Sajitha; A.R. Krishnan; Thomas Kurian

2013-01-01T23:59:59.000Z

44

Investigation of 4-ASK modulation with digital filtering to increase 20 times of direct modulation speed of white-light LED visible light communication system  

Science Journals Connector (OSTI)

In this demonstration, we propose and experimentally investigate the quaternary-amplitude-shift-keying (4-ASK) modulation with digital filtering to enhance the direct modulation speed...

Yeh, C H; Liu, Y F; Chow, C W; Liu, Y; Huang, P Y; Tsang, H K

2012-01-01T23:59:59.000Z

45

APPLICATION EXAMPLES OF ADVANCED DIGITAL CONTROL IN WIRE INDUSTRY  

Science Journals Connector (OSTI)

Abstract In wire and cable industry, mass production is done for enamel wire production and foamed insulated cable for telephone line. This paper presents applications of multivariable control to these production processes. The control systems are designed based on state space approach using the computer aided design package. The temperature distribution control of enamelling oven is presented first, and in the second, the simultaneous control of the capacitance and diameter of the foamed insulated cable is discribed. Both control systems are now practically used with satisfactory results. Keywords. Multivariable control; Enamelling oven; Temperature distribution control foamed insulated cable.

K. Furuta; M. Sampei; Y. Nakamura; K. Asaka

1987-01-01T23:59:59.000Z

46

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 24, NO. 11, NOVEMBER 2009 2625 Hybrid Digital Adaptive Control for Fast Transient  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 24, NO. 11, NOVEMBER 2009 2625 Hybrid Digital Adaptive, IEEE, and Dragan Maksimovi´c, Senior Member, IEEE Abstract--This paper presents a hybrid digital advanced control concepts, such as hybrid control [1]. Hybrid controllers, which include switching among

47

Digital Position Control for Analog Servos Sven Behnke and Michael Schreiber  

E-Print Network (OSTI)

of the zero-position which are caused by changes in temperature and/or supply voltage. To overcome of the zero-position which are caused by changes in temperature and/or supply voltage. To overcomeDigital Position Control for Analog Servos Sven Behnke and Michael Schreiber Humanoid Robots Group

Menegatti, Emanuele

48

Design of a Robust Digital Current Controller for a Grid Connected Interleaved Inverter  

E-Print Network (OSTI)

Design of a Robust Digital Current Controller for a Grid Connected Interleaved Inverter M. A for a three- phase voltage source grid-connected interleaved inverter. Each phase consists of 6 half small output filter capacitors are required which provide high impedance to grid voltage harmonics

49

Beyond Control Panels: Direct Manipulation for Visual Analytics  

SciTech Connect

Information Visualization strives to provide visual representations through which users can think about and gain insight into information. By leveraging the visual and cognitive systems of humans, complex relationships and phenomena occurring within datasets can be uncovered by exploring information visually. Interaction metaphors for such visualizations are designed to enable users direct control over the filters, queries, and other parameters controlling how the data is visually represented. Through the evolution of information visualization, more complex mathematical and data analytic models are being used to visualize relationships and patterns in data – creating the field of Visual Analytics. However, the expectations for how users interact with these visualizations has remained largely unchanged – focused primarily on the direct manipulation of parameters of the underlying mathematical models. In this article we present an opportunity to evolve the methodology for user interaction from the direct manipulation of parameters through visual control panels, to interactions designed specifically for visual analytic systems. Instead of focusing on traditional direct manipulation of mathematical parameters, the evolution of the field can be realized through direct manipulation within the visual representation – where users can not only gain insight, but also interact. This article describes future directions and research challenges that fundamentally change the meaning of direct manipulation with regards to visual analytics, advancing the Science of Interaction.

Endert, Alexander; Bradel, Lauren; North, Chris

2013-07-19T23:59:59.000Z

50

Improving waveform quality in direct power control of DFIG using fuzzy controller  

Science Journals Connector (OSTI)

This paper proposes a new direct power control (DPC) strategy of double-fed induction generator using fuzzy logic controller. The active and reactive power equations are expanded, and effects of voltage vecto...

H. Z. Boroujeni; M. F. Othman; A. H. Shirdel…

2014-11-01T23:59:59.000Z

51

Discrete sliding mode control strategy for direct real and reactive power regulation of wind driven DFIG  

Science Journals Connector (OSTI)

Abstract This paper investigates a discrete sliding mode control (DSMC) strategy for direct real and reactive power regulation for wind driven doubly fed induction generator (DFIG). The real and reactive power errors are eliminated by directly calculating the rotor control voltages through DSMC. In the stator stationary reference frame, direct real and reactive power control strategy is implemented. Therefore, it does not require the angular information of the stator and rotor currents or voltages. It does not involve any extra current loops which results into simple design. The use of constant converter switching frequency via space vector pulse width modulation eases the AC harmonic filter design and improves the power quality. The use of fast and flexible discrete controller makes the system competent with modern digital world. Detailed simulations have been carried out to validate the method. The simulation results reveal that the real and reactive power references are followed smoothly even in the presence of speed perturbations and performance of the system is robust against parameter variations and system disturbances.

V.N. Pande; U.M. Mate; Shailaja Kurode

2013-01-01T23:59:59.000Z

52

Electrically controlling the polarizing direction of a graphene polarizer  

SciTech Connect

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.

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

53

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

SciTech Connect

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.

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

54

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

DOE Patents (OSTI)

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.

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

1998-01-01T23:59:59.000Z

55

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

DOE Patents (OSTI)

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.

Warburton, W.K.

1998-06-30T23:59:59.000Z

56

Low cost, practical, all-digital open-loop fiber-optic gyroscope  

Science Journals Connector (OSTI)

A novel all-digital scheme for open-loop fiber-optic gyroscope (FOG), where only two key points of output wave were digitized directly, has been proposed. A control equation, with...

Yang, Yuanhong; Zhang, Weixu; Ma, Jing; Chen, Xinjun

2003-01-01T23:59:59.000Z

57

Novel digital control of conventional electric motor drives for home appliances  

Science Journals Connector (OSTI)

Research has been done on developing advanced control strategies for industrial DC motor drives. However, there is little advancement in the controllers designed for small appliance motors, which still use old and inefficient methods of control. The old methods of appliance motor control are the triac control and the PWM control. These methods are cheap and easy to implement, but they have a drawback – not regulating the controlled quantity properly and fast enough. The only reason they still persist in the appliance market is because of their cost of implementation. Appliance markets are very sensitive to cost changes; therefore, everything for an appliance motor is optimised for low cost. In this paper, we present a new control strategy for appliance motors, which is inherently digital in nature. 'The pulse adjustment method' can be used to control the speed of appliance motors very effectively. The implementation is easy and the cost of implementation is also low; yet, this method gives better results as compared to the PWM and triac control. The said performance of the pulse adjustment method is proven through simulations.

Srdjan Lukic; Abhijeet Bhandwale; Ali Emadi

2010-01-01T23:59:59.000Z

58

Digital SCR Control Box for Educational Laboratory Zakdy Sorchini,Jonathan W. Kimball and Philip T. Krein  

E-Print Network (OSTI)

Digital SCR Control Box for Educational Laboratory Zakdy Sorchini,Jonathan W. Kimball and Philip T designed to introduce the silicone controlled rectifier (SCR) to power electronicsstudents. SCRs are useful, I. INTRODUCTION The silicon controlled rectifier (SCR) is an important device in the context

Kimball, Jonathan W.

59

A Digital Signal Processor Based Controller for Inventory Confirmation Using Mass-Spring Devices  

SciTech Connect

Successful inventory confirmation measurements in SNM storage monitoring scenarios require electronic systems that are capable of long-term, reliable operation. Reliability can be improved by using systems with a minimum of inaccessible active components. A resonant weight pad has been designed to determine item mass with only two passive components located at the SNM storage point. During operation, the resonant weight pad and the monitored item become a mass-spring system, whose resonant frequency is related to the item's mass. This paper describes a Digital Signal Processor (DSP) based control system that is capable of determining resonance and correlating it to a mass value. In addition, the control system provides a communication link between the weight pad and a host processor.

Stinson, B. J.; Bell, Z. W.

2002-06-01T23:59:59.000Z

60

Future directions for arms control and nonproliferation. Conference summary  

SciTech Connect

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.

Not Available

1994-07-06T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

BACNET AND ANALOG/DIGITAL INTERFACES OF THE BUILDING CONTROLS VIRTUAL TEST BED  

NLE Websites -- All DOE Office Websites (Extended Search)

6E 6E BacNet and Analog/Digital Interfaces of the Building Controls Virtual Testbed Thierry Stephane Nouidui, Michael Wetter, Zhengwei Li, Xiufeng Pang, Prajesh Bhattachayra, Philip Haves November 2011 DISCLAIMER This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or

62

Building HVAC Control System Interaction Issues: Two Case Studies  

E-Print Network (OSTI)

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...

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

2007-01-01T23:59:59.000Z

63

RESEARCH ARTICLE Controlling speed and direction during interception  

E-Print Network (OSTI)

. Turning rate was controlled using a steering wheel and speed was controlled using a foot pedal (Wann and Land 2000), braking (Lee 1976; Yilmaz and Warren 1995), and fly ball catching (Chapman 1968

64

Two dimensional control of metamaterial parameters for radiation directivity  

E-Print Network (OSTI)

This work examines the feasibility of using metamaterials to direct radiation. The limits of required index of refraction and the required material depth are explored using MATLAB simulations. A wedge of connected S-shape ...

Foltz, Eleanor R. (Eleanor Ruth)

2006-01-01T23:59:59.000Z

65

An Efficient Wide-Speed Direct Torque Control Based on Fuzzy Logic Technique.  

E-Print Network (OSTI)

??Conventional Direct Torque Control (CDTC) system faces the problems of high flux and torque ripples, and has difficulty in improving the performance of dynamic torque… (more)

Zhao, Jibo

2012-01-01T23:59:59.000Z

66

Cross-directional control of sheet and film processes  

Science Journals Connector (OSTI)

Sheet and film processes include polymer film extrusion, coating processes of many types, paper manufacturing, sheet metal rolling, and plate glass manufacture. Identification, estimation, monitoring, and control of sheet and film processes are of substantial ... Keywords: Large-scale systems, Robust control, Singular value analysis

Jeremy G. VanAntwerp; Andrew P. Featherstone; Richard D. Braatz; Babatunde A. Ogunnaike

2007-02-01T23:59:59.000Z

67

Surface control bent sub for directional drilling of petroleum wells  

DOE Patents (OSTI)

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.

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

1986-01-01T23:59:59.000Z

68

A direct and neural controller performance study with beam wandering mitigation control in free space optical link  

Science Journals Connector (OSTI)

The beam wander on the detector plane is one of the main causes for major power loss which severely degrades the performance of Free Space Optical (FSO) link. Designing a suitable controller to correct the beam motion at a faster rate to increase the ... Keywords: Direct controller, beam wandering, impulse response and scintillation, neural-controller, prediction accuracy

A. Arockia Bazil Raj, J. Arputha Vijaya Selvi, D. Kumar, S. Raghavan

2014-07-01T23:59:59.000Z

69

Intelligent Control of the Linear Motor Direct Drive Feed System for CNC Machine Tools  

Science Journals Connector (OSTI)

The linear feed system directly driven by a linear motor is more and more widely used in high speed CNC machine tools. In this linear “direct drive” feed system, all mechanical transmission elements are eliminated. The linear motor’s ... Keywords: intelligent control, linear motor, direct drive, linear feed system, machine tool

Shuhong Xiao; Guangyuan Zheng; Shuquan Chen

2008-12-01T23:59:59.000Z

70

Direct control of doubly fed induction generator fed by PWM converter with a variable structure control based on a sliding mode control  

Science Journals Connector (OSTI)

This paper presents a direct control of doubly fed induction generator (DFIG) with a variable structure control based on ... and reactive power performance when it applies to DFIG. Simulation results and improvem...

Youcef Bekakra; Djilani Ben Attous

2014-09-01T23:59:59.000Z

71

Bi-directional power control system for voltage converter  

DOE Patents (OSTI)

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.

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

1999-01-01T23:59:59.000Z

72

Comparison between conventional and digital nuclear power plant main control rooms: A task complexity perspective, part I: Overall results and analysis  

Science Journals Connector (OSTI)

Abstract Digitalization is a trend in safety-critical complex systems. It changes the way human interacts with systems. We have less empirical knowledge about its potential negative effects on human. In our study, we compared conventional and digital main control rooms (MCRs) in nuclear power plants (NPPs) from a task complexity perspective. Complexity factors in \\{MCRs\\} were quantified in terms of three aspects, frequency of occurrence, complexity induced by their being, and impact caused by them. A total of 69 licensed operators participated in the study. The study consists of two parts. In Part I, overall results and analysis were reported. Generally, operators in digital \\{MCRs\\} perceived higher frequency and higher impact of complexity factors than those in conventional MCRs, no matter in abnormal/emergency or normal situations. Operators in digital \\{MCRs\\} perceived higher complexity than those in conventional \\{MCRs\\} in abnormal/emergency situations. These findings suggest that operators in digital \\{MCRs\\} experience higher complexity and workload which may reduce their reliability. These findings imply that we should caution the side-effects of ubiquitous digitalization in complex industrial systems. Relevance to industry Digital technologies are widely deployed in the nuclear industry. They change the working environments in which operators interact with NPP systems. There is insufficient research on operator experience on the changes brought by technological developments in NPP control rooms. Our findings imply that we should take care of the potential negative effect of digitalization on operator working environments.

Peng Liu; Zhizhong Li

2014-01-01T23:59:59.000Z

73

Direct  

NLE Websites -- All DOE Office Websites (Extended Search)

interactions, and the pollutant emission is hence directly proportional to the bulk neutral density. Simultaneously monitoring the total emission at 1040 nm and the...

74

Direction and control adjustment for smooth motion of wheeled mobile robots  

Science Journals Connector (OSTI)

Control of wheeled mobile robots (differential or steering wheel structure) has been studied extensively in the last decades, and many control strategies were proposed for various applications. This paper will present the solutions to two issues encountered in the implementation of the controllers: over corrections of the robot's heading direction and saturation of the control efforts. The solutions to the problems and their experimental verifications are provided.

L. Huang

2010-01-01T23:59:59.000Z

75

Dynamic modeling and direct power control of wind turbine driven DFIG under unbalanced network voltage conditions  

Science Journals Connector (OSTI)

This paper proposes an analysis and a direct power control (DPC) design of a wind turbine driven doubly-fed induction generator (DFIG) under unbalanced network voltage conditions. A DFIG model described in the po...

Jia-bing Hu; Yi-kang He; Lie Xu

2008-12-01T23:59:59.000Z

76

An airborne digital processor for radar scatterometer data  

E-Print Network (OSTI)

Interface 5 7 III DIRECT MEMORY ACCESS DMA Controllers Controller I Controller II Controller III Controller IV 10 10 10 15 15 IV AIRCRAFT INTERFACE 21 AC/I Controller Operational Devices The Bit Synchronizer 21 23 25 V SUMMARY... the binary rep- resentation of aircraft attitude parameters. These parameters are avail- able from the ADC. Unfortunately, the ADC format is incompatible with the digital processor format. Generally, the ADC format presents the data in a serial bit pulse...

Yeadon, David Steven

2012-06-07T23:59:59.000Z

77

INTEGRATED DIRECT/INDIRECT ADAPTIVE ROBUST CONTROL OF MULTI-DOF HYDRAULIC ROBOTIC ARMS  

E-Print Network (OSTI)

INTEGRATED DIRECT/INDIRECT ADAPTIVE ROBUST CONTROL OF MULTI-DOF HYDRAULIC ROBOTIC ARMS Amit/indirect adaptive robust control (DIARC) strategy for a hydraulically actuated 3-DOF robotic arm. To avoid the need FOUNDATION GRANT NO. CMS-0600516. draulic robot arm (a scaled down version of an industrial back- hoe

Yao, Bin

78

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

SciTech Connect

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)

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

79

CO2 Sequestration by Direct Gas?Solid Carbonation of Air Pollution Control (APC) Residues  

Science Journals Connector (OSTI)

CO2 Sequestration by Direct Gas?Solid Carbonation of Air Pollution Control (APC) Residues ... Furthermore, because fossil fuels are projected to be a dominant energy resource in the 21st century,1 technologies for sequestering emissions from fossil fuel combustion in a safe and definitive manner are being developed and implemented. ... According to these authors, the solution containing free calcium could then be used in a carbonation process for capturing CO2 directly from air. ...

Renato Baciocchi; Alessandra Polettini; Raffaella Pomi; Valentina Prigiobbe; Viktoria Nikulshina Von Zedwitz; Aldo Steinfeld

2006-07-07T23:59:59.000Z

80

Direct bandwidth and polarization control of an XEF unstable resonator laser  

SciTech Connect

Several approaches to directly controlling the bandwidth and polarization of an unstable resonator without the use of an injection source have been tested. The techniques are based on the control of oscillations within (and around) the resonator core through the use of small, subaperture optical elements (e.g., etalons, Brewster-angle plates, Glan-air prisms) mounted at select locations within the system. The experiments were formed on a 4 J, e-beam pumped, XeF (B..-->..X) laser operating at ambient temperature, with output predominantly at 353.2 nm. A spectral linewidth of less than 12 GHz (0.05 A) and nearly perfect linear polarization were simultaneously achieved at high laser efficiency. Oscillation on a single, dominant transverse mode has been demonstrated. The increased cost and complexity of injection controlled systems are avoided through the use of these direct, core control approaches.

Litzenberger, L.N.; Smith, M.J. (Avco Research Lab., Inc., Everett, MA (US))

1988-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Real-time digital control of DFIG-based wind generators for grid support.  

E-Print Network (OSTI)

??In this thesis, a set of new converter /control techniques are developed for the Grid Side and Rotor Side converter applications in DFIG wind power… (more)

Mesbah, Mohsen

2012-01-01T23:59:59.000Z

82

Decentralized coordination through digital technology, dynamic pricing, and Customer-Driven control: the GridWise testbed demonstration project  

SciTech Connect

The project highlights the idea that technology-enabled decentralized coordination can achieve the same, or better, economic and reliability benefits when compared to utility-focused centralized physical and economic control. Among the design's unique features was a retail double auction with five-minute market-clearing intervals that included residential customers as direct, active market participants. (author)

Chassin, David P.; Kiesling, Lynne

2008-10-15T23:59:59.000Z

83

Direct numerical technique of mathematical programming for optimal control of Xenon oscillation in load following operation  

SciTech Connect

A simple core control code is developed for the control of a nuclear reactor in the load following operation. The core state equations are described by the one-group diffusion equation with moderator temperuture and xenon feedbacks and iodine-xenon dynamics equations. The control via control rod, boron, and coolant inlet temperature is considered. To avoid the conventional difficulties of a two-point boundary value problem, the optimal control problem is solved by the direct numerical technique of the mathematical programming without the separation of space and time variables. This quadratic programming problem is solved by the Davidon-Fletcher-Powell method, which is a general unconstrained optimization method. In the cases of the load following operation of Korea Nuclear Units 7 and 8, the results obtained by using the present model show that the scheduled load demand is successfully followed, and the power distribution maintains the desired distribution with a minimum amount of control action.

Yoon, M.H.; No, H.C.

1985-06-01T23:59:59.000Z

84

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

SciTech Connect

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.

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

2005-02-25T23:59:59.000Z

85

Scene perception and the visual control of travel direction in navigating wood ants  

Science Journals Connector (OSTI)

...control of travel direction in navigating wood ants Thomas S. Collett 1 David D. Lent...to visual science. In it, we show for wood ants, as Mike has done for a variety of...head or body movements. In the case of wood ants, close examination of their body...

2014-01-01T23:59:59.000Z

86

Current Directions of Structural Health Monitoring and Control in USA Satish Nagarajaiah1,  

E-Print Network (OSTI)

Current Directions of Structural Health Monitoring and Control in USA Satish Nagarajaiah1,§, 1 Prof.,Dept. of Civil & Env./Dept of Mech. Eng. & Mat. Sc., Rice Univ., Houston, TX 77005, U.S.A. 2 Prof.,Dept. of Mech. Aero. and Struc. Eng., Washington Univ., St. Louis, MO 63130, U.S.A. 3 Asst. Prof

Lynch, Jerome P.

87

NETL: IEP – Post-Combustion CO2 Emissions Control - Coal Direct Chemical  

NLE Websites -- All DOE Office Websites (Extended Search)

- Oxy-Combustion CO2 Emissions Control - Oxy-Combustion CO2 Emissions Control Coal Direct Chemical Looping Retrofit for Pulverized Coal-Fired Power Plants with In-Situ CO2 Capture Project No.: DE-NT0005289 Ohio State chemical looping metal carrier. Ohio State chemical looping metal carrier. The Ohio State University Research Foundation will further develop coal direct chemical looping (CDCL) technology. CDCL uses a patented iron oxide-based composite oxygen carrier and can be retrofit to existing coal-fired power plants. The development of the CDCL system will be conducted through experimental testing under bench- and sub-pilot scales. Related Papers and Publications: Coal Direct Chemical Looping Retrofit to Pulverized Coal Power Plants for In-Situ CO2 Capture [PDF-2.43MB] (July 2013) Presented by Samuel Bayham of the Ohio State University Research Foundation at the 2013 NETL CO2 Capture Technology Meeting.

88

Wide input range DC-DC converter with digital control scheme  

E-Print Network (OSTI)

boost converter a battery or ultracapacitor energy storage is connected to take care of the fuel cell slow transient response (200 watts/min). The robust features of the proposed control system ensure a constant output DC voltage for a variety of load...

Harfman Todorovic, Maja

2006-04-12T23:59:59.000Z

89

Digital materials for digital fabrication  

E-Print Network (OSTI)

This thesis introduces digital materials by analogy with digital computation and digital communications. Traditional fabrication techniques include pick-and-place, roll-to-roll, molding, patterning and more. Current research ...

Popescu, George A

2007-01-01T23:59:59.000Z

90

Study of mixture formation and early flame development in a research GDI (gasoline direct injection) engine through numerical simulation and UV-digital imaging  

Science Journals Connector (OSTI)

Abstract The analysis of the mixture formation and early combustion processes in a slightly lean burn gasoline direct injection (GDI) engine is performed by using experimental and numerical techniques. UV–visible natural emission digital imaging is applied in the optically accessible combustion chamber of a research engine. This is equipped with the four-valve head and the same injection system of a commercial turbocharged engine. Optical accessibility is obtained through a quartz window placed on the piston head. Numerical simulations are performed by means of a 3D model developed within the AVL FireTM environment, which exploits an in-house developed sub-model for simulating the spray dynamics. Tests are carried out using commercial gasoline. The cyclic variability of the engine is first analysed in order to properly define a reference average pressure cycle to be used for the validation of the numerical model. This last is then proved as being highly predictive as the start of injection is moved in the working cycle. The main effects of the injection and ignition timing on the characteristic flame development angles, namely on the flame initiation and propagation, are analysed. Flame initiation is visualised both numerically and experimentally.

M. Costa; L. Marchitto; S.S. Merola; U. Sorge

2014-01-01T23:59:59.000Z

91

A preliminary user-friendly, digital console for the control room parameters supervision in old-generation Nuclear Plants  

SciTech Connect

Improvements in the awareness of a system status is an essential requirement to achieve safety in every kind of plant. In particular, in the case of Nuclear Power Plants (NPPs), a progress is crucial to enhance the Human Machine Interface (HMI) in order to optimize monitoring and analyzing processes of NPP operational states. Firstly, as old-fashioned plants are concerned, an upgrading of the whole console instrumentation is desirable in order to replace an analog visualization with a full-digital system. In this work, we present a novel instrument able to interface the control console of a nuclear reactor, developed by using CompactRio, a National Instruments embedded architecture and its dedicated programming language. This real-time industrial controller composed by a real-time processor and FPGA modules has been programmed to visualize the parameters coming from the reactor, and to storage and reproduce significant conditions anytime. This choice has been made on the basis of the FPGA properties: high reliability, determinism, true parallelism and re-configurability, achieved by a simple programming method, based on LabVIEW real-time environment. The system architecture exploits the FPGA capabilities of implementing custom timing and triggering, hardware-based analysis and co-processing, and highest performance control algorithms. Data stored during the supervisory phase can be reproduced by loading data from a measurement file, re-enacting worthwhile operations or conditions. The system has been thought to be used in three different modes, namely Log File Mode, Supervisory Mode and Simulation Mode. The proposed system can be considered as a first step to develop a more complete Decision Support System (DSS): indeed this work is part of a wider project that includes the elaboration of intelligent agents and meta-theory approaches. A synoptic has been created to monitor every kind of action on the plant through an intuitive sight. Furthermore, another important aim of this work is the possibility to have a front panel available on a web interface: CompactRio acts as a remote server and it is accessible on a dedicated LAN. This supervisory system has been tested and validated on the basis of the real control console for the 1-MW TRIGA reactor RC-1 at the ENEA, Casaccia Research Center. In this paper we show some results obtained by recording each variable as the reactor reaches its maximum level of power. The choice of a research reactor for testing the developed system relies on its training and didactic importance for the education of plant operators: in this context a digital instrument can offer a better user-friendly tool for learning and training. It is worthwhile to remark that such a system does not interfere with the console instrumentation, the latter continuing to preserve the total control. (authors)

Memmi, F.; Falconi, L.; Cappelli, M.; Palomba, M.; Santoro, E.; Bove, R.; Sepielli, M. [UTFISST, ENEA Casaccia, via Anguillarese 301, Rome (Italy)

2012-07-01T23:59:59.000Z

92

Current-based direct power control of a DFIG under unbalanced grid voltage  

Science Journals Connector (OSTI)

Abstract A novel current-based direct power control (CB-DPC) strategy for a grid-connected doubly-fed induction generator (DFIG) is proposed. The reported control scheme is applicable to DFIG-based variable-speed wind turbines that operate under unbalanced network voltages. The required DFIG rotor voltage for precise regulation of the stator active and reactive output powers and accurate elimination of their inherent pulsations are directly obtained using a nonlinear integral sliding-mode control (ISMC) scheme. Compared with other control methods, the proposed strategy is simpler since it is not based on the symmetrical components theory, does not need multiple synchronous coordinate transformations, and only requires DFIG voltage and current values as its inputs. Constant switching frequency of the rotor-side converter (RSC) is achieved by means of space vector pulse-width modulation (SVPWM) technique. Uncertainties in the parameters of the generator are included in the design. A compensation strategy is also proposed for tracking error mitigation of the powers that occur due to elimination of the chattering phenomena in the ISMC scheme. Simulation results on a 2MW DFIG under different operating conditions are presented to validate the effectiveness and robustness of the proposed method.

Mohammad Farshadnia; Seyed Abbas Taher

2014-01-01T23:59:59.000Z

93

Digital rotation measurement unit  

DOE Patents (OSTI)

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.

Sanderson, S.N.

1983-09-30T23:59:59.000Z

94

digital primary patch bay  

Science Journals Connector (OSTI)

A patch bay that provides (a) the first ... in a technical control facility and (b) patching, monitoring, and testing capabilities for both...Common abbreviation DPPB. Note: The digital ci...

2001-01-01T23:59:59.000Z

95

Direct determination of organic and inorganic sulfur in coal by controlled oxidation  

SciTech Connect

The overall objective of this project is to develop an analytical method to directly measure the forms of organic sulfur in coal. The method will provide a route to monitor the effectiveness of coal preparation research directed toward removal of organic sulfur in coal. The approach involves subjecting diluted coal samples simultaneously to an oxygen flow and a linear increase in temperature. Distinctive sulfur dioxide evolution patterns are observed among coals of different rank and between raw and treated coals. Assignments have been made relating each specific sulfur dioxide evolution to the non-aromatic organic, aromatic organic, and inorganic sulfur present in coals and treated coals. Work is progressing on schedule to optimize experimental conditions and to improve the efficiency of the controlled-atmosphere programmed-temperature oxidation (CAPTO) method by developing a multiple sample instrumental system.

LaCount, R.B.

1992-01-01T23:59:59.000Z

96

Direct determination of organic and inorganic sulfur in coal by controlled oxidation  

SciTech Connect

The overall objective of this project is to develop an analytical method to directly measure the forms of organic sulfur in coal. The method will provide a route to monitor the effectiveness of coal preparation research directed toward removal of organic sulfur in coal. The approach involves subjecting diluted coal samples simultaneously to an oxygen flow and a linear increase in temperature. Distinctive sulfur dioxide evolution patterns are observed among coals of different rank and between raw and treated coals. Assignments have been made relating each specific sulfur dioxide evolution to the non-aromatic organic, aromatic organic, and inorganic sulfur present in coals and treated coals. Work is progressing on schedule to optimize experimental conditions and to improve the efficiency of the controlled-atmosphere programmed-temperature oxidation (CAPTO) method by developing a multiple sample instrumental system.

LaCount, R.B.

1992-12-31T23:59:59.000Z

97

Controlling combustion noise in direct injection diesel engine through mechanical vibration measurement  

Science Journals Connector (OSTI)

The next generations of direct injection diesel engines have greatly improved their performances compared with petrol engines. However, one of the pending subjects is the noise and vibration levels, due to working cycle itself. The design effort to reduce the emissions of noise and vibration transmitted to the vehicle's driver could be lessened because of the assembly process variation. In this paper, a procedure to control this variation has been suggested in order to maintain noise and vibration performances within the limits of design.

J.A. Calvo; V. Diaz; J.L. San Roman

2005-01-01T23:59:59.000Z

98

Comparison between conventional and digital nuclear power plant main control rooms: A task complexity perspective, Part II: Detailed results and analysis  

Science Journals Connector (OSTI)

Abstract Part II of this study aims to provide detailed, diagnostic information about the complexity difference between conventional and digital main control rooms (MCRs) in nuclear power plants. Complexity factors were classified according to task components and complexity dimensions. The effects of operator experience and plant type on complexity factors were statistically analyzed from three levels, i.e., task components, complexity dimensions, and individual factors. Interface management complexity factors were compared with other factors in digital MCRs. The results suggest that generally operator experience had effects on several task components and complexity dimensions only in abnormal/emergency situations. Plant type affected several task component and complexity dimensions in both abnormal/emergency and normal situations. Complexity factors in the affected task components and complexity dimensions had higher frequency, complexity, or impact in digital \\{MCRs\\} than those in conventional MCRs. Factors related to crew activity and the dimensions of overabundance, temporal demand, and variability had relatively high frequency, complexity, or impact. Compared with other factors, interface management complexity factors had marginally higher frequency, but significantly lower complexity and impact. Relevance to industry This study quantitatively addresses the complexity difference between conventional and digital \\{MCRs\\} in detail. It may provide rich information for how to improve operator working environments in NPPs. It may also contribute to other applied domains, such as human reliability analysis and interface design.

Peng Liu; Zhizhong Li

2014-01-01T23:59:59.000Z

99

Modeling and improvement of direct power control of DFIG under unbalanced grid voltage condition  

Science Journals Connector (OSTI)

Abstract This paper presents analysis and control of a doubly-fed induction generator (DFIG)-based wind generation system operating under unbalanced grid voltage condition. The DFIG system is modeled in synchronous positive reference frame. System behavior and operation of both the generator and the grid side converter (GSC) under unbalanced condition is illustrated by definition of oscillating power terms in the synchronous reference frame. This analysis makes it possible to control both the active and reactive power generation by means of direct power control (DPC) technique. It is shown that considering the DFIG model in synchronous reference frame simplifies the power terms extraction. Moreover, alternative DFIG control targets such as reducing unbalanced stator current, torque and power pulsations minimization, are considered. In addition, by the proposed method, the oscillation of the stator output power is compensated by the GSC, to ensure constant power output from the overall DFIG generation system. The validation of results has been performed through simulation results on a 2 MW DFIG wind generation system.

Mohammad Jafar Zandzadeh; Abolfazl Vahedi

2014-01-01T23:59:59.000Z

100

Active and reactive power ripple minimization in direct power control of matrix converter-fed DFIG  

Science Journals Connector (OSTI)

Abstract Despite the advantages of matrix converters (MCs) compared with standard voltage source converters (VSCs), all of the direct power control (DPC) strategies for doubly fed induction generator (DFIG) reported in the literature, only utilize VSCs. In this paper, the influence of MC voltage vectors on active and reactive powers variation is investigated. Compared with VSCs, \\{MCs\\} generate higher number of voltage vectors. Using this inherent advantage of MC, the main contribution of this paper is to reduce large active and reactive power ripples which is one of the main drawbacks of conventional DPC method. Utilizing a wide range of voltage vectors with different amplitudes, a new switching table is derived which using this table, not only large power ripple is compensated but also, a close to unity input power factor for MC can be achieved. In the other word, the presented scheme adds the advantages of MC and DPC together. Moreover, Owing to the operation of MC in direct ac–ac form, the presented scheme effectively eliminates the need for the grid side converter used in conventional DPC, which has a complicated control method is eliminated. Simulation results show the effectiveness of the proposed method and have a reasonable correspondence with theoretical and mathematical analysis.

Arjang Yousefi-Talouki; Edris Pouresmaeil; Bo Nřrregaard Jřrgensen

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

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

SciTech Connect

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.

None

2010-09-01T23:59:59.000Z

102

Controlling Pattern Formation in Nanoparticle Assemblies via Directed Solvent Dewetting Christopher P. Martin, Matthew O. Blunt, Emmanuelle Pauliac-Vaujour, Andrew Stannard, and Philip Moriarty*  

E-Print Network (OSTI)

Controlling Pattern Formation in Nanoparticle Assemblies via Directed Solvent Dewetting Christopher highly localized control of pattern formation in two-dimensional nanoparticle assemblies by direct modification of solvent dewetting dynamics. A striking dependence of nanoparticle organization on the size

Nielsen, Steven O.

103

IEEE TRANSACTIONS ON ENERGY CONVERSION, VOL. 21, NO. 2, JUNE 2006 619 Direct Torque Control of Induction Motor With Fuzzy Stator  

E-Print Network (OSTI)

--Direct torque control, fuzzy logic, induction mo- tor, stator resistance. I. INTRODUCTION DIRECT torque control logic is proposed. The input variables of the fuzzy logic identifier are the input and output of the low the fuzzy estimator and a classical integrator in a direct torque control (DTC) scheme prove the superiority

Paris-Sud XI, Université de

104

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

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.

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

2013-03-01T23:59:59.000Z

105

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

E-Print Network (OSTI)

membership functions were introduced. This controller could attenuate road disturbance by up to 78%. Additionally, a sliding-mode controller (SMC) is developed with a different approach from the other three control methodologies. While SMC is developed...

Lee, Seungho

2010-01-16T23:59:59.000Z

106

Goal-directed planning and plan recognition for the sustainable control of homes  

E-Print Network (OSTI)

The goal of this thesis is to design an autonomous control system for the sustainable control of buildings. The control system focusses on satisfying three goals to encourage and facilitate a more sustainable lifestyle for ...

Graybill, Wesley (Wesley Darwin)

2012-01-01T23:59:59.000Z

107

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

E-Print Network (OSTI)

.A. Djaffar) Abstract This paper describes the design of a new configuration of direct power control (DPC inverter voltage vector in order to minimize instantaneous active and reactive power errors using two powers by selecting the optimal switching states of the inverter. Simulation results have proved

Paris-Sud XI, Université de

108

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

E-Print Network (OSTI)

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...

Joshi, Praveen Sudhakar

2012-06-07T23:59:59.000Z

109

Exploring Variety in Digital Collections and the Implications for Digital Preservation  

E-Print Network (OSTI)

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 ...

Smith, MacKenzie

2005-01-01T23:59:59.000Z

110

Direct Power Control of Doubly-Fed Generator Based Wind Turbine Converters to Improve Low Voltage  

E-Print Network (OSTI)

Control (DPC) is discussed for Low Voltage Ride Through (LVRT) of DFIG based wind turbine converters power integration state that doubly fed induction generator (DFIG) controllers should be capable and maintaining dc bus voltage, then the DFIG will stay online during the disturbance. A fast acting controller

Kimball, Jonathan W.

111

Digital Library Initiative Rice University  

E-Print Network (OSTI)

technical targets) o Implementation (metadata creation, digital capture, quality control assurance) o a particular media or subject matter rather than creating hard and fast rules. #12;Guidelines for managing

112

Fuzzy Neural Network Control for Robot Manipulator Directly Driven by Switched Reluctance Motor  

Science Journals Connector (OSTI)

Applications of switched reluctance motor SRM to direct drive robot are increasingly popular because of its valuable advantages. However, the greatest potential defect is its torque ripple owing to the significant nonlinearities. In this paper, a fuzzy ...

Baoming Ge; Aníbal T. de Almeida

2011-07-01T23:59:59.000Z

113

Toward a Better Understanding of Ducted Rotor Antitorque and Directional Control in Forward Flight  

E-Print Network (OSTI)

of the Core Automatic Flight Control System (CAFCS) mode. Figure 1 shows a sustained, large-amplitude 1-Hz yaw ABSTRACT Despite decades of very successful yaw-control and anti-torque applications, the aerodynamics dramatic. From a handling-qualities perspective, the ducted rotor provides the loads capacity required

114

Reliability analysis of safety-related digital instrumentation and control in a nuclear power plant.  

E-Print Network (OSTI)

?? There is so far no consensus on how to develop a reliability model of safety-related digitalinstrumentation and control (I&C) in a probabilistic safety assessment… (more)

Gustafsson, Johan

2012-01-01T23:59:59.000Z

115

A novel direct torque control for induction motor drive system with low torque ripple and current distortion utilising FPGA  

Science Journals Connector (OSTI)

The conventional Direct Torque Control (DTC) is known to produce quick and robust response in ac drives. However, during steady state, notable torque and current pulsations occur. They are reflected in speed estimation, torque response and also produce acoustic noise. In this paper, a novel Space Vector Modulated Direct Torque Control (SVM-DTC) with Low Pass Filter (LPF) for induction motor drive system is proposed, which features low torque ripple, low current distortion and fixed switching frequency. The proposed scheme has been implemented on the Xilinx Spartan 3E FPGA, both simulation and experimental results show that the proposed system can dramatically improve the steady state performance while preserving the dynamic performance of the conventional DTC.

R. Rajendran; N. Devarajan

2013-01-01T23:59:59.000Z

116

Parental Investment and the Control of Sexual Selection: Predicting the Direction of Sexual Competition  

Science Journals Connector (OSTI)

...March 1996 research-article Parental Investment and the Control of Sexual Selection...ratio, and the extent of collateral investment. Reproductive events can be complex, involving collateral investments from several individuals, either...

1996-01-01T23:59:59.000Z

117

NUTHOS-6 2004 Direct Control Flow Testing on Function Block Diagrams  

E-Print Network (OSTI)

. - FBD - LD - etc. SDS - Nat. Lang. - FBD - LD - etc. SRS - Nat. Lang. - SCR - NuSCR SRS - Nat. Lang. - SCR - NuSCR CASE Tool *.exe Code-based Testing - C - Ada - etc. #12;3 Proposed Testing Approach Direct. - FBD - LD - etc. SRS - Nat. Lang. - SCR - NuSCR SRS - Nat. Lang. - SCR - NuSCR PLC CASE Tool *.exe Code

118

Self-Tuning Fuzzy Control of Switched Reluctance Motor Directly-driven Hydraulic Press  

Science Journals Connector (OSTI)

For hydraulic press presenting the advantage of force and speed range, hydraulic press is widely used in metal forming process. However, conventional hydraulic press has inefficient energy due to the requirement of motor continuously running regardless ... Keywords: fuzzy logic control, hydraulic press, switched reluctant motor

Shuguo Wei; Shengdun Zhao; Jianming Zheng

2009-05-01T23:59:59.000Z

119

Chapter 9 - Digital Succession  

Science Journals Connector (OSTI)

This chapter focuses on the emerging concerns of risks related to succession planning and management in the corporate environment. Topics such as succession planning, the information technology security shortage, women in security, protection of digital assets, security of assets, continuation of digital activity and content management, and digital expiration will be discussed, as will digital legacy, digital immortality, and digital resurrection.

Deborah Gonzalez

2015-01-01T23:59:59.000Z

120

Laser-Directed Hierarchical Assembly of Liquid Crystal Defects and Control of Optical Phase Singularities  

SciTech Connect

Topological defect lines are ubiquitous and important in a wide variety of fascinating phenomena and theories in many fields ranging from materials science to early-universe cosmology, and to engineering of laser beams. However, they are typically hard to control in a reliable manner. Here we describe facile erasable 'optical drawing' of self-assembled defect clusters in liquid crystals. These quadrupolar defect clusters, stabilized by the medium's chirality and the tendency to form twisted configurations, are shaped into arbitrary two-dimensional patterns, including reconfigurable phase gratings capable of generating and controlling optical phase singularities in laser beams. Our findings bridge the studies of defects in condensed matter physics and optics and may enable applications in data storage, singular optics, displays, electro-optic devices, diffraction gratings, as well as in both optically- and electrically-addressed pixel-free spatial light modulators.

Ackerman, P. J.; Qi, Z. Y.; Lin, Y. H.; Twombly, C. W.; Laviada, M. J.; Lansac, Y.; Smalyukh, I. I.

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Precision digital pulse phase generator  

DOE Patents (OSTI)

A timing generator comprises a crystal oscillator connected to provide an output reference pulse. A resistor-capacitor combination is connected to provide a variable-delay output pulse from an input connected to the crystal oscillator. A phase monitor is connected to provide duty-cycle representations of the reference and variable-delay output pulse phase. An operational amplifier drives a control voltage to the resistor-capacitor combination according to currents integrated from the phase monitor and injected into summing junctions. A digital-to-analog converter injects a control current into the summing junctions according to an input digital control code. A servo equilibrium results that provides a phase delay of the variable-delay output pulse to the output reference pulse that linearly depends on the input digital control code. 2 figs.

McEwan, T.E.

1996-10-08T23:59:59.000Z

122

Precision digital pulse phase generator  

DOE Patents (OSTI)

A timing generator comprises a crystal oscillator connected to provide an output reference pulse. A resistor-capacitor combination is connected to provide a variable-delay output pulse from an input connected to the crystal oscillator. A phase monitor is connected to provide duty-cycle representations of the reference and variable-delay output pulse phase. An operational amplifier drives a control voltage to the resistor-capacitor combination according to currents integrated from the phase monitor and injected into summing junctions. A digital-to-analog converter injects a control current into the summing junctions according to an input digital control code. A servo equilibrium results that provides a phase delay of the variable-delay output pulse to the output reference pulse that linearly depends on the input digital control code.

McEwan, Thomas E. (Livermore, CA)

1996-01-01T23:59:59.000Z

123

Controllable fabrication of high purity Mg(OH)2 nanoneedles via direct transformation of natural brucite  

Science Journals Connector (OSTI)

Abstract High purity Mg(OH)2 nanoneedles with diameters of 3–5 nm and lengths of 40–60 nm were synthesized directly from natural brucite via a facile and dissolution-free route in the presence of magnesium sulfosalicylate and polyethylene glycol (PEG, MW1000). Under hydrothermal conditions, magnesium sulfosalicylate caused layered brucite to disintegrate into thin nanosheets and could transport hydroxyl groups from the nanosheets to Mg(OH)2 crystal nuclei as a “supplier”. The PEG1000 might regulate the one-dimensional morphology and improve the purity of the Mg(OH)2 nanoneedles by forming selective hydrogen bonds on the related Mg(OH)2 crystal surfaces. Since this novel approach is simple and low-cost in comparison with wet precipitation method, the process can easily be scaled up.

Xuesong Wang; Hongchang Pang; Wendan Chen; Yuan Lin; Guiling Ning

2014-01-01T23:59:59.000Z

124

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

SciTech Connect

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.

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

125

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

SciTech Connect

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.

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

126

Admixture enhanced controlled low-strength material for direct underwater injection with minimal cross-contamination  

SciTech Connect

Commercially available admixtures have been developed for placing traditional concrete products under water. This paper evaluates adapting anti-washout admixture (AWA) and high range water reducing admixture (HRWRA) products to enhance controlled low-strength materials (CLSMs) for underwater placement. A simple experimental scale model (based on dynamic and geometric similitude) of typical grout pump emplacement equipment has been developed to determine the percentage of cementing material washed out. The objective of this study was to identify proportions of admixtures and underwater CLSM emplacement procedures which would minimize the cross-contamination of the displaced water while maintaining the advantages of CLSM. Since the displaced water from radioactively contaminated systems must be subsequently treated prior to release to the environment, the amount of cross-contamination is important for cases in which cementing material could form hard sludges in a water treatment facility and contaminate the in-place CLSM stabilization medium.

Hepworth, H.K.; Davidson, J.S.; Hooyman, J.L.

1997-03-01T23:59:59.000Z

127

CMPE 650: Digital Systems Course Master  

E-Print Network (OSTI)

CMPE 650: Digital Systems Course Master Prof. Tinoosh Mohsenin ITE 323 tinoosh@umbc.edu 410 and theoretical aspects necessary to design high-speed and energy efficient digital systems. Emphasis is on design systems on an FPGA development board. Topics such as architectures, control, functional units, and circuit

Mohsenin, Tinoosh

128

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

SciTech Connect

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.

Goldman, Charles

2007-03-01T23:59:59.000Z

129

Digital Frequency Domain Multiplexer for mm-Wavelength Telescopes  

SciTech Connect

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.

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

2007-07-23T23:59:59.000Z

130

Towards Optimal Strategies for Moving Droplets in Digital Microfluidic Systems  

E-Print Network (OSTI)

Towards Optimal Strategies for Moving Droplets in Digital Microfluidic Systems Karl F. Böhringer@ee.washington.edu Abstract - In digital microfluidic systems, analyte droplets (volume typically less than 1µl outlines a high-level approach to optimally control digital microfluidic systems, i.e., to develop

131

Mitsubishi experience on digital I and C and modernization  

SciTech Connect

Digital systems are being applied to instrumentation and control (I and C) systems, including safety and non-safety systems, to accommodate obsolescence of existing analog devices or to obtain the benefits of digital I and C systems in new nuclear power plants as well as existing plants. This paper presents the Mitsubishi experience of digital I and C application and modernization. (authors)

Shirasawa, H.; Samples, R. P. [Mitsubishi Nuclear Energy Systems, Inc., 1001 19th St N, Arlington, VA 22209 (United States)

2012-07-01T23:59:59.000Z

132

Droplet-Based Pyrosequencing Using Digital Microfluidics  

Science Journals Connector (OSTI)

The feasibility of implementing pyrosequencing chemistry within droplets using electrowetting-based digital microfluidics is reported. An array of electrodes patterned on a printed-circuit board was used to control the formation, transportation, merging, ...

Deborah J. Boles; Jonathan L. Benton; Germaine J. Siew; Miriam H. Levy; Prasanna K. Thwar; Melissa A. Sandahl; Jeremy L. Rouse; Lisa C. Perkins; Arjun P. Sudarsan; Roxana Jalili; Vamsee K. Pamula; Vijay Srinivasan; Richard B. Fair; Peter B. Griffin; Allen E. Eckhardt; Michael G. Pollack

2011-09-20T23:59:59.000Z

133

Digital Measures screen changes 1 Digital Measures screen changes 2  

E-Print Network (OSTI)

Digital Measures screen changes 1 #12; Digital Measures screen changes 2 #12; Digital Measures screen changes 3 #12; Digital Measures screen changes 4 #12; Digital Measures screen changes 5 #12; Digital Measures screen changes 6 #12; Digital Measures screen changes 7 #12

Barrash, Warren

134

Direct active and reactive power control of 3-level NPC-fed DFIG considering power ripple minimisation  

Science Journals Connector (OSTI)

Despite the advantages of three-level neutral point clamp (NPC) converters compared with standard voltage source inverters (VSIs), most of the direct power control (DPC) strategies for doubly fed induction generator (DFIG) reported in the literature, only utilise VSIs. As regards three-level NPC converter generates higher number of voltage vectors compared with standard VSIs, This paper presents a DPC strategy for DFIG using three-level NPC converters in which three-level NPC voltage vectors are employed to reduce large power ripples of conventional DPC. Therefore, a new optimised switching table is derived. Using this table, DFIG provides not only elaborate active and reactive powers which track their reference values very well, but also large power ripple is compensated. Also, because of ripple reduction, total harmonic distortion of rotor current, stator current, stator voltage and grid line-to-line voltage is reduced in proposed strategy compared with conventional DPC. Simulation results show the effectiveness of proposed method and have a reasonable correspondence with theoretical and mathematical analysis.

Milad Yousefi-Talouki; Parviz Ramezanpour

2014-01-01T23:59:59.000Z

135

DIGITAL ARCHITECTURE PROJECT PLAN  

SciTech Connect

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.

Ken Thomas

2014-09-01T23:59:59.000Z

136

Marketing to Physicians in a Digital World  

Science Journals Connector (OSTI)

...currently spend 25% of their marketing budgets on digital technologies, such as websites and social media. Electronic health records (EHRs), social media, and mobile applications represent new ways for pharmaceutical companies to conduct market research and to market directly to physicians. EHRs are... Pharmaceutical marketing can lead to overdiagnosis, overtreatment, and overuse of medications. Digital advertising creates new pathways for reaching physicians, allowing delivery of marketing messages at the point of care, when clinical decisions are being made.

Manz C.Ross J.S.Grande D.

2014-11-13T23:59:59.000Z

137

Digital Photography Hacks  

Science Journals Connector (OSTI)

Going beyond the standard fare of most digital photography books, Digital Photography Hacks shares the knowledge that professional photographers have learned through thousands of shots' worth of experience and years of experimentation. With exquisite, ...

Derrick Story

2004-05-01T23:59:59.000Z

138

digital circuit patch bay  

Science Journals Connector (OSTI)

A patch bay in which low-level digital data circuits may be patched, monitored, and tested. Note: The digital circuit patch bay may be either (a) a...See also circuit ...

2001-01-01T23:59:59.000Z

139

Digital Audio Tape (DAT)  

Science Journals Connector (OSTI)

Since the introduction of the CD in 1983, consumers have wondered when a digital tape Standard would complete the digital picture, so to speak, and provide an alternative to the analog cassette. The R-DAT (rot...

John Eargle

1992-01-01T23:59:59.000Z

140

Human Reliability Analysis for Digital Human-Machine Interfaces  

SciTech Connect

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.

Ronald L. Boring

2014-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

An intelligent CNC machine control system architecture  

SciTech Connect

Intelligent, agile manufacturing relies on automated programming of digitally controlled processes. Currently, processes such as Computer Numerically Controlled (CNC) machining are difficult to automate because of highly restrictive controllers and poor software environments. It is also difficult to utilize sensors and process models for adaptive control, or to integrate machining processes with other tasks within a factory floor setting. As part of a Laboratory Directed Research and Development (LDRD) program, a CNC machine control system architecture based on object-oriented design and graphical programming has been developed to address some of these problems and to demonstrate automated agile machining applications using platform-independent software.

Miller, D.J.; Loucks, C.S.

1996-10-01T23:59:59.000Z

142

Electron flow to oxygen in higher plants and algae: rates and control of direct photoreduction (Mehler reaction) and rubisco oxygenase  

Science Journals Connector (OSTI)

...and high temperatures and high...a strong control of Mehler...inorganic carbon supply. A part...and high temperatures and high...a strong control of Mehler...inorganic carbon supply. A part...and high temperatures and high...a strong control of Mehler...inorganic carbon supply. A part...

2000-01-01T23:59:59.000Z

143

Mapping the global digital divide  

Science Journals Connector (OSTI)

The global digital divide as a concept is intuitively understood by most academicians, politicians and public policy makers. However, to date little empirical work exists to explain differences in per country access to information and communication technologies (ICTs). The research that does exist places heavy influence on the impact of country wealth, as measured by gross domestic product (GDP) per capita, on the diffusion of ICTs. While GDP per capita certainly influences the diffusion of ICTs within a country, it is not the sole determinant of a country's location versus other countries vis-a-vis the global digital divide. To investigate and map the global digital divide, as it currently exists, the authors utilise model-based cluster analysis to determine cohorts of countries based on three variables: personal computers per 100 population, internet users per 100 population and internet bandwidth per person. The results indicate that the global digital divide consists of four tiers. And although all of the developed countries are included in the first tier, some surprising results are obtained. Implications of the results are discussed and directions for future research are provided.

D. Steven White; Angappa Gunasekaran; Timothy P. Shea; Godwin C. Ariguzo

2011-01-01T23:59:59.000Z

144

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

SciTech Connect

With recent theoretical and empirical research in basic and applied psychology, human factors, and engineering, it is now sufficient to define an integrated approach to the deign of advanced displays for present and future nuclear power plants. Traditionally, the conventional displays have shown operators the individual variables on gauges, meters, strip charts, etc. This design approach requires the operators to mentally integrate the separately displayed variables and determine the implications for the plant state. This traditional approach has been known as the single-sensor-single-indicator display design and it places an intolerable amount of mental workload on operators during transients and abnormal conditions. This report discusses a new alternative approach which is the use of direct perception interfaces. Direct perception a interfaces display the underlying physical and system constraints of the situation in a directly perceptual way, such that the viewer need not reason about what is seen to identify system states, but can identify the state of the system perceptually. It is expected that displays which show the dynamics of fundamental physical laws should better support operator decisions and diagnoses of plant states. The purpose of this research project is to develop a suite of direct perception displays for PWR nuclear power plant operations.

Jones, B.; Shaheen, S.; Moray, N.; Sanderson, P.; Reising, D.V.

1993-05-21T23:59:59.000Z

145

Control-theoretic cyber-physical system modeling and synthesis: A case study of an active direct methanol fuel cell  

Science Journals Connector (OSTI)

A joint optimization of the physical system and the cyber world is one of the key problems in the design of a cyber-physical system (CPS). The major mechanical forces and/or chemical reactions in a plant are commonly modified by actuators in the balance-of-plant ... Keywords: Balance of plants system, Cyber-physical systems, Direct methanol fuel cell

Donghwa Shin; Jaehyun Park; Younghyun Kim; Jaeam Seo; Naehyuck Chang

2012-12-01T23:59:59.000Z

146

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

E-Print Network (OSTI)

in the LENS system makes this feasible. Dissimilar powder materials can be placed into separate powder hoppers the composition within each layer deposit. Previous work in the closely related process of fusion welding has changes in a continuous manner from one target value to another. However, with a direct metal- deposition

DuPont, John N.

147

Digital Video 1 DIGITAL VIDEO, LEARNING STYLES AND STUDENT UNDERSTANDING  

E-Print Network (OSTI)

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

Larkin, Teresa L.

148

Digital Object Identifier 10.1109/MCS.2009.934990 22 IEEE CONTROL SYSTEMS MAGAZINE FEBRUARY 2010 1066-033X/10/$26.002010IEEE  

E-Print Network (OSTI)

in con- trol engineering practice. Interest in delay systems is driven by ap- plications such as chemical process control, machining, combustion systems, teleoperation, and networked systems. Delay systems belong to achieve closed-loop stability, even though the nominal controller is designed to stabilize the system

Krstic, Miroslav

149

Energy Efficient Digital Networks  

E-Print Network (OSTI)

introduced to the market, saving energy in California, thesupport EEE to save energy, so broad market adoption shouldaccelerate market transformation of energy efficient digital

Lanzisera, Steven

2014-01-01T23:59:59.000Z

150

Explorations through digital video.  

E-Print Network (OSTI)

??Previous learning experiences, that transformed my understandings of learning as a student learning to use digital video at Gulf Islands Film and Television School (GIFTS),… (more)

Riecken, Janet Lily Ann

2011-01-01T23:59:59.000Z

151

Digital student portfolio  

E-Print Network (OSTI)

4.1. What are students’ thoughts about accessing their class4.2. What students like and don’tlike about the Digital Student Port-

Dinh, Son

2009-01-01T23:59:59.000Z

152

Digital radiographic systems detect boiler tube cracks  

SciTech Connect

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.

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

2008-06-15T23:59:59.000Z

153

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

E-Print Network (OSTI)

to renewable energy (wind farms in particular). The proposed control algorithm offers the advantages of proven large speed variations around the synchronous speed. Another advantage is that the power electronic voltage is adopted. This uncommon approach allows for a decomposition of the active and reactive powers

Batlle, Carles

154

Direct control based on sliding mode techniques for multicell serial L. Amet, M. Ghanes and J. P. Barbot  

E-Print Network (OSTI)

. This is carried out thanks to the de- velopments of power semiconductors and new energy conver- sion systems. To assume the increase of power consumption, inverters have to be controlled more efficiently and increase their power. A solution to obtain both conditions is to use multilevel inverters [2] which combines switching

Paris-Sud XI, Université de

155

Digital Additive Manufacturing: From Rapid Prototyping to Rapid Manufacturing  

Science Journals Connector (OSTI)

The emergence of stereolithography in 1998 is a milestone for an entirely new class of layer-based manufacturing processes. This new manufacturing approach which allows direct digital manufacturing from CAD to a ...

K. K. B. Hon

2007-01-01T23:59:59.000Z

156

Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping...  

Open Energy Info (EERE)

Field Mapping Using Arcpad, In: Digital Mapping Techniques '02- Workshop Proceedings Abstract Research into the practicality of digital mapping by Placer Dome Exploration...

157

INTELLISONDE TM Digital Radiosonde  

E-Print Network (OSTI)

, 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. The sensor is not affected by thermal transients or mechanical stress. An internal temperature sensor located

Groppi, Christopher

158

Digital Planetaria: Building Bridges  

E-Print Network (OSTI)

Digital Planetaria: Building Bridges Building Bridges Between Institutions, Universities Group Goals & Objectives: The goal of the Building Bridges focus group was to create a framework applications and dreaming about their potential in the digital dome environment. #12;L to R, Back to front

Collar, Juan I.

159

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

E-Print Network (OSTI)

is presented. A mathematical model for the proposed DTC of the PMSM topology is developed. A simulation program written in MATLAB/SIMULINK? is used to verify the basic operation (performance) of the proposed topology. The mathematical model is capable....5 Load Angle Measurement ........................................................................81 ix CHAPTER IV OPEN-LOOP SIMULINK? MODEL OF THE PM SPINDLE MOTOR ...........88 4.1 Principles of PMSM Open-Loop Control...

Ozturk, Salih Baris

2007-04-25T23:59:59.000Z

160

PLAN100%DIGITAL PLAN100%DIGITAL  

E-Print Network (OSTI)

Servicio de carga delegada para la in corporaciĂłn al repositorio institucional (Digital.CSIC) de la InformaciĂłn CientĂ­fica pa ra la Inves tigaciĂłn con el fin de que la prestaciĂłn y seguimiento de los servicios

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Digital I and C system upgrade integration technique  

SciTech Connect

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)

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

162

A Heuristic Digital Control Method for Optimal Capacitor Charging Mor Mordechai Peretz, Student Member, IEEE, and Sam Ben-Yaakov, Senior Member, IEEE  

E-Print Network (OSTI)

a frequency resolution enhancement algorithm that allows fine tuning of the drive. Excellent agreement primarily by analog circuits. For example, limiting the inrush current by sweeping the drive frequency up to the resonant frequency which is a function of the (variable) capacitor voltage. Tight frequency control

163

Control of the direction and rate of nuclear spin flips in InAs quantum dots using detuned optical pulse trains  

E-Print Network (OSTI)

We find that detuning an optical pulse train from electronic transitions in quantum dots controls the direction of nuclear spin flips. The optical pulse train generates electron spins that precess about an applied magnetic field, with a spin component parallel to the field only for detuned pulses. This component leads to asymmetry in the nuclear spin flips, providing a way to produce a stable and precise value of the nuclear spin polarization. This effect is observed using two-color, time-resolved Faraday rotation and ellipticity.

S. G. Carter; A. Shabaev; Sophia E. Economou; T. A. Kennedy; A. S. Bracker; T. L. Reinecke

2009-01-16T23:59:59.000Z

164

Fast transient digitizer  

DOE Patents (OSTI)

Method and apparatus for sequentially scanning a plurality of target elements with an electron scanning beam modulated in accordance with variations in a high-frequency analog signal to provide discrete analog signal samples representative of successive portions of the analog signal; coupling the discrete analog signal samples from each of the target elements to a different one of a plurality of high speed storage devices; converting the discrete analog signal samples to equivalent digital signals; and storing the digital signals in a digital memory unit for subsequent measurement or display.

Villa, Francesco (Palo Alto, CA)

1982-01-01T23:59:59.000Z

165

Digital ac monitor  

DOE Patents (OSTI)

An apparatus and method is provided for monitoring a plurality of analog ac circuits by sampling the voltage and current waveform in each circuit at predetermined intervals, converting the analog current and voltage samples to digital format, storing the digitized current and voltage samples and using the stored digitized current and voltage samples to calculate a variety of electrical parameters; some of which are derived from the stored samples. The non-derived quantities are repeatedly calculated and stored over many separate cycles then averaged. The derived quantities are then calculated at the end of an averaging period. This produces a more accurate reading, especially when averaging over a period in which the power varies over a wide dynamic range. Frequency is measured by timing three cycles of the voltage waveform using the upward zero crossover point as a starting point for a digital timer. 24 figs.

Hart, G.W.; Kern, E.C. Jr.

1987-06-09T23:59:59.000Z

166

Emancipatory Digital Archaeology  

E-Print Network (OSTI)

photograph taken of a teapot at Tall Dhiban in Jordan, a35 4 Tempest in a digital teapot 40 History of Photographydigital photograph of a teapot. Yet this photograph exhibits

Morgan, Colleen

2012-01-01T23:59:59.000Z

167

Digital Technology Group Computer Laboratory  

E-Print Network (OSTI)

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

Cambridge, University of

168

ADVISORY ALERT: Dekker, Ltd. Digital Signature - PARS II Reporting  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ADVISORY ALERT: Dekker, Ltd. Digital Signature - PARS II Reporting ADVISORY ALERT: Dekker, Ltd. Digital Signature - PARS II Reporting As you know, to run reports in the PARS II, users must install an active X control to their workstations. The FIRST TIME a user attempts to run a report after installing the Active X control, a Security Warning will appear stating: That warning appears because, although the digital signature is valid, the digital signature is from a publisher (in this case Dekker, Ltd.) whom you have not yet chosen to trust. The following steps instruct you how to clear the security warning so that you may continue working with PARS II reports. Please note: Once you complete the process of accepting the Dekker, LTd. digital signature, this warning will not re-appear. This process must be done ONCE to "inform" your PC that Dekker, LTd. is an

169

Immunizing digital systems against electromagnetic interference  

SciTech Connect

This paper discusses the development of the technical basis for acceptance criteria applicable to the immunization of digital systems against electromagnetic interference (EMI). The work is sponsored by the US Nuclear Regulatory Commission and stems from the safety-related issues that need to be addressed as a result of the application of digital instrumentation and control systems in nuclear power plants. Designers of digital circuits are incorporating increasingly higher clock frequencies and lower logic level voltages, thereby leading to potentially greater susceptibility of spurious interference being misinterpreted as legitimate logic. Development of the technical basis for acceptance criteria to apply to these digital systems centers around establishing good engineering practices to ensure that sufficient levels of electromagnetic compatibility (EMC) are maintained between the nuclear power plant`s electronic and electromechanical systems. First, good EMC design and installation practices are needed to control the emissions from interference sources and thereby their impact on other nearby circuits and systems. Secondly, a test and evaluation program is needed to outline the EMI tests to be performed, the associated test methods to be followed, and adequate test limits to ensure that the circuit or system under test meets the recommended guidelines. Test and evaluation should be followed by periodic maintenance to assess whether the recommended EMI control practices continue to be adhered to as part of the routine operation of the nuclear power plant. By following these steps, the probability of encountering safety-related instrumentation problems associated with EMI will be greatly reduced.

Ewing, P.D.; Korsah, K. [Oak Ridge National Lab., TN (United States); Antonescu, C. [Nuclear Regulatory Commission, Washington, DC (United States). Office of Nuclear Regulatory Research

1993-02-01T23:59:59.000Z

170

Immunizing digital systems against electromagnetic interference  

SciTech Connect

This paper discusses the development of the technical basis for acceptance criteria applicable to the immunization of digital systems against electromagnetic interference (EMI). The work is sponsored by the US Nuclear Regulatory Commission and stems from the safety-related issues that need to be addressed as a result of the application of digital instrumentation and control systems in nuclear power plants. Designers of digital circuits are incorporating increasingly higher clock frequencies and lower logic level voltages, thereby leading to potentially greater susceptibility of spurious interference being misinterpreted as legitimate logic. Development of the technical basis for acceptance criteria to apply to these digital systems centers around establishing good engineering practices to ensure that sufficient levels of electromagnetic compatibility (EMC) are maintained between the nuclear power plant's electronic and electromechanical systems. First, good EMC design and installation practices are needed to control the emissions from interference sources and thereby their impact on other nearby circuits and systems. Secondly, a test and evaluation program is needed to outline the EMI tests to be performed, the associated test methods to be followed, and adequate test limits to ensure that the circuit or system under test meets the recommended guidelines. Test and evaluation should be followed by periodic maintenance to assess whether the recommended EMI control practices continue to be adhered to as part of the routine operation of the nuclear power plant. By following these steps, the probability of encountering safety-related instrumentation problems associated with EMI will be greatly reduced.

Ewing, P.D.; Korsah, K. (Oak Ridge National Lab., TN (United States)); Antonescu, C. (Nuclear Regulatory Commission, Washington, DC (United States). Office of Nuclear Regulatory Research)

1993-01-01T23:59:59.000Z

171

Implementation of a digital signal processing (DSP) boost inverter for fuel cell energy generation.  

E-Print Network (OSTI)

??This thesis investigates and implements the use of a microprocessor called Digital Signal Processors (DSP) as a controller in the design of a low power… (more)

Claveria, Joevis J

2014-01-01T23:59:59.000Z

172

Digital Actuator Technology  

SciTech Connect

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.

Ken Thomas; Ted Quinn; Jerry Mauck; Richard Bockhorst

2014-09-01T23:59:59.000Z

173

Digital optical conversion module  

DOE Patents (OSTI)

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.

Kotter, Dale K. (North Shelley, ID); Rankin, Richard A. (Ammon, ID)

1991-02-26T23:59:59.000Z

174

Digital optical conversion module  

DOE Patents (OSTI)

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.

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

1988-07-19T23:59:59.000Z

175

Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques  

Open Energy Info (EERE)

Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques '02- Workshop Proceedings Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques '02- Workshop Proceedings Abstract Research into the practicality of digital mapping by Placer Dome Exploration identified hardware and software solutions to enhance the efficiency and accuracy of field work. The goal of the research was to find a lightweight hardware-software system that allows the user to build a digital map from field observations in much the same way as pen and paper methods. The focus of the research was to minimize the size and weight of computer systems. Systems identified consist of a wearable PC or handheld

176

Prototype of time digitizing system for BESIII endcap TOF upgrade  

E-Print Network (OSTI)

The prototype of time digitizing system for the upgrade of BESIII endcap TOF (ETOF) is introduced in this paper. The ETOF readout electronics has a formation of distributed architecture that hit signal from multi-gap resistive plate chamber (MRPC) is signaled as LVDS by front-end electronics (FEE) and sent to the back-end time digitizing system via long shield differential twisted pair cables. The ETOF digitizing system consists of 2 VME crates each of which contains modules of time digitizing, clock, trigger and fast control etc. The time digitizing module (TDIG) of this prototype can support up to 72 electrical channels of hit information measurement. The fast control (FCTL) module can operate at barrel or endcap mode. The barrel FCTL fans fast control signals from the trigger system out to endcap FCTLs, merges data from endcaps and transfers to the trigger system. Without modifying the barrel TOF structure, this time digitizing architecture benefits for improving ETOF performance without degrading barrel TOF measuring. Lab experiments show that the time resolution of this digitizing system can be less than 20ps, and the data throughput to DAQ can be about 92Mbps. Beam experiments show that the complete time resolution can be less than 45ps.

Cao Ping; Sun Wei-Jia; Ji Xiao-Lu; Fan Huan-Huan; Wang Si-Yu; Liu Shu-Bin; An Qi

2013-05-30T23:59:59.000Z

177

Directional Sensor Control: Heuristic Approaches  

E-Print Network (OSTI)

sensors are fused to form global estimates of target locations. ... We assume that there is a notional fusion center, which ...... a string-submodular type property.

2014-05-03T23:59:59.000Z

178

Alexandria Digital Earth ProtoType The Alexandria Digital Earth  

E-Print Network (OSTI)

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

Janée, Greg

179

Digital Strategy | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Digital Strategy Digital Strategy Digital Strategy November 21, 2013 - 5:15pm Addthis Implementing the Federal Digital Strategy Implementing the Federal Digital Strategy Alex Cohen Alex Cohen Senior Digital Information Strategist New expectations require the Federal Government to be ready to deliver and receive digital information and services anytime, anywhere and on any device. It must do so safely, securely, and with fewer resources. To build for the future, the Federal Government has developed a Digital Strategy that embraces the opportunity to innovate more with less, and enables entrepreneurs to better leverage government data to improve the quality of services to the American people. The Energy Department has responded to this challenge through key initiatives that make high-value data sets available through API's that

180

Digital Options for Panoramic Radiology  

Science Journals Connector (OSTI)

Digital X-ray imaging is making substantial inroads into the dental practice. The purpose of this chapter is to provide a succinct overview of the various digital options for panoramic dental radiography.

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

The Digital Interactive Video  

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

182

Digitalization Ilkka Niemel  

E-Print Network (OSTI)

(140/50 %) Environmental Engineering (120/29 %) Architecture (156/32 %) Energy Technology (125Aalto - Digitalization Ilkka Niemelä May 13, 2014 #12;Research excellence Focus and relevance by building on strengths Global business dynamics ArchitectureWorld class potential Process and systems

Kaski, Samuel

183

Digital Lumens | Open Energy Information  

Open Energy Info (EERE)

Lumens Lumens Jump to: navigation, search Name Digital Lumens Address 110 Canal Street Place Boston, Massachusetts Zip 02114 Product Intelligent Lighting System Year founded 2008 Number of employees 11-50 Phone number (617) 723-1200 Website http://www.digitallumens.com Coordinates 42.3644808°, -71.0602745° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.3644808,"lon":-71.0602745,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

184

Digital Intermediate Frequency Receiver Module For Use In Airborne Sar Applications  

DOE Patents (OSTI)

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.

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

2005-03-08T23:59:59.000Z

185

Three phase AC motor controller  

DOE Patents (OSTI)

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.

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

186

A Automated Tool for Supporting FMEAs of Digital Systems  

SciTech Connect

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.

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

2008-09-07T23:59:59.000Z

187

Cost Model for Digital Curation: Cost of Digital Migration  

E-Print Network (OSTI)

Steece, B. 2000. Software cost estimation with COCOMO II.Developing a Framework of Cost Elements for PreservingAshley, K. 1999. Digital archive costs: Facts and fallacies.

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

2009-01-01T23:59:59.000Z

188

Abstract --When a real time digital simulator, emulating a switched circuit such as a voltage source converter, is interfaced  

E-Print Network (OSTI)

1 Abstract -- When a real time digital simulator, emulating a switched circuit such as a voltage source converter, is interfaced with a digital controller, the controller's firing signals may. Incorrect power flow due to inaccurate firing times and controller errors. 2. Switching jitter due

Lehn, Peter W.

189

Digital Microfluidics for Multidimensional Biology.  

E-Print Network (OSTI)

??Digital microfluidics (DMF) has emerged in the past decade as a novel microfluidic paradigm. As a liquid handling technology, DMF facilitates the electrostatic manipulation of… (more)

Eydelnant, Irwin Adam

2014-01-01T23:59:59.000Z

190

Visual programming expedites process control  

SciTech Connect

Software development and maintenance costs continue to decrease as recent graphical user-interface (GUI) techniques advance. Improvement in the hardware cost-performance has also supported GUI success. In the area of modulating control for power plants, however, cost decreases have already been achieved through user-friendly forms. In the area of programmable logic controllers, there are three types of programming methods: relay ladder logic, Boolean, and high level language. Recently, the development of a programmable logic controller with the latest fashioned user interface (such as the window, icon, menu, and pointer environment on a control engineering workstation) has come on the market. Although its GUI features are quite good, it is not easy for plant engineers to use due to the various programming forms (e.g., ladder logic diagrams) which are often used. The system featured in this article has been developed and commercialized for direct digital modulating control (DDC) prior to the programmable controller. The construction and maintenance tools for the system are set up in workstations and personal computers. The tool is familiar to instrument and control designers and has more GUI uses. The key to the design of this system, however, is the use of input frames containing control block diagrams, which are constructed from several standard operational elements.

Isomura, S.; Katoh, M.

1996-10-01T23:59:59.000Z

191

Paper Augmented Digital Documents Franois Guimbretire  

E-Print Network (OSTI)

1 Paper Augmented Digital Documents François Guimbretière Department of Computer Science Human Paper Augmented Digital Documents (PADDs) are digital documents that can be manipulated either the digital and the paper worlds. As digital documents, PADDs are easy to edit, distribute and archive

Keinan, Alon

192

Digital Audio Compression By Davis Yen Pan  

E-Print Network (OSTI)

Digital Audio Compression By Davis Yen Pan Abstract Compared to most digital data types, with the exception of digital video, the data rates associ- ated with uncompressed digital audio are substan- tial. Digital audio compression enables more effi- cient storage and transmission of audio data. The many forms

Lazar, Aurel A.

193

Digital Ship Digital Ship Ship September 2008 page 45  

E-Print Network (OSTI)

Digital Ship Digital Ship Ship September 2008 page 45 TT he European Maritime Data Man- agement how best to improve on VDR equipment for the next generation of the technology. The ship VDR community can take steps to avoid a repetition. Moreover, the UK Marine Accident Investigation Board (MAIB

194

Digital Jordan Curve Theorems Christer O. Kiselman  

E-Print Network (OSTI)

Digital Jordan Curve Theorems Christer O. Kiselman's digital Jordan curve theorem states that the complement of a Jordan curve in the digital plane of Jordan curves. 1 Introduction The classical Jordan curve theorem says that the complement

Kiselman, Christer

195

Product lines for digital information products.  

E-Print Network (OSTI)

??Digital information products are an important class of widely used digital products, whose core benefit is the delivery of information or education (e.g., electronic books,… (more)

Pankratius, Victor

2007-01-01T23:59:59.000Z

196

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)

the synchronous speed. Another advantage is that the power electronic equipment that controls the machine only has-fed induction machine with specific applications to renewable energy (wind farms in particular). The proposed control algorithm offers the advantages of proven stability and remarkable simplicity. In contrast

Batlle, Carles

197

Directives Help  

Directives, Delegations, and Requirements

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.

198

SUPPLEMENTAL DIRECTIVE  

National Nuclear Security Administration (NNSA)

of Defense Nuclear Security CONTROLLED DOCUMENT AVAILABLE ON-LINE AT: http:lwww.nnsa.energy.gov OFFICE OF PRIMARY INTEREST (OPI): Office of Defense Nuclear Security printed...

199

A Distributed Control Group of Mobile Robots in a Limited Area with a Vision System  

Science Journals Connector (OSTI)

Digital remote manual control systems are no less complicated than automatic control. Engineers have to overcome number of unique problems. Mechanical parts have to respond to digital signals transferred through ...

Artur Babiarz; Robert Bieda; Krzysztof Jaskot

2013-01-01T23:59:59.000Z

200

Superconducting digital logic amplifier  

SciTech Connect

This paper describes a superconducting digital logic amplifier for interfacing between a Josephson junction logic circuit having output current and a higher voltage semiconductor circuit input. The amplifier comprising: an input terminal for connection to a ; an output terminal for connection to a semiconductor circuit input; an input, lower critical current, Josephson junction having first and second terminals; a first series string of at least three lower critical current Josephson junctions. The first series string being connected to the first terminal of the input Josephson junction such that the first series string is in series with the input Josephson junction to provide a series combination. The input terminal being connected to the first terminal of the input Josephson junction, and with the critical current of the lower critical current Josephson junctions of the input Josephson junction and the first series Josephson junctions being less than the output current of the low voltage Josephson junction circuit; a second series string of at least four higher critical current Josephson junctions. The second string being connected in parallel with the series combination to provide parallel strings having an upper common connection and a lower common connection. The lower common connection being connected to the second terminal of the input Josephson junction and the upper common connection being connected to the output terminal; and a pulsed DC current source connected the parallel strings at the upper common connection. The DC current source having a current at least equal to the critical current of the higher critical current Josephson junctions.

Przybysz, J.X.

1989-08-22T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Digital Smithsonian Fiscal Years 20102015  

E-Print Network (OSTI)

and Linus Pauling plead for peace in earlier times. A research scientist in Bangladesh can consult the work of technology can combine with Smithsonian resources to create unprecedented access. Digitization is one

Mathis, Wayne N.

202

Digital compositing with traditional artwork  

E-Print Network (OSTI)

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...

Stanley, Michael Leighton

2005-11-01T23:59:59.000Z

203

Understanding Personal Digital Collections: An Interdisciplinary Exploration  

E-Print Network (OSTI)

, humanities, curatorship, digital collections ACM Classification Keywords H5.m. Information interfaces

Feinberg, Melanie

204

Paper Augmented Digital Documents Franois Guimbretire  

E-Print Network (OSTI)

1 Paper Augmented Digital Documents Fran�ois Guimbreti�re Department of Computer Science Human Digital Documents (PADD), are digital documents that can be manipulated either on a computer screen and the paper worlds. As digital documents, PADD are easy to edit, distribute and archive; as paper documents

Golbeck, Jennifer

205

A new digital overcurrent relay  

E-Print Network (OSTI)

A NEW DIGITAL OVERCURRENT RELAY A Thesis by MD. SAYEED HASAN Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1992 Major Subject...: Electrical Engineering A NEW DIGITAL OVERCURRENT RELAY A Thesis by MD. SAYEED HASAN Approved as to style and content by: B. Don Russell (Co-Chair of Committee) Karan Watson (Co-Chair of Committee) L. Bhuyan (Member) A. Abur (Member) ' Jo owze...

Hasan, Md. Sayeed

2012-06-07T23:59:59.000Z

206

Decimal System and Double Digits  

NLE Websites -- All DOE Office Websites (Extended Search)

Decimal System and Double Digits Decimal System and Double Digits Name: Ken Status: other Grade: other Country: Canada Date: April 2011 Question: If the origin of the decimal system reflects counting on ten fingers and if zero came into use after the decimal system had been established why did we not create a single symbol for our tenth digit rather than use the double digit 10? If T were to represent the tenth number this would have created a counting system where the number series 1,2...9,T is followed by the same series having a 1 to the left then followed by the same series having a 2 to the left, etc. The T would be the last number in a series of ten single digits rather than be the first number in a series of double digits. The symbol zero would be used only between negative one and positive one because it represents the existence of nothing and, therefore, would have no other function.

207

On-chip Tunable Micro-ring Resonator Based on Digital Microfluidics Platform  

Science Journals Connector (OSTI)

We demonstrate the tunability of a silicon nitride micro-resonator using the concept of Digital Microfluidics. Our system allows driving micro-droplets on-chip, enabling the control of...

Zuta, Yoav; Goykhman, Ilya; Desiatov, Boris; Levy, Uriel

208

High performance control of harmonic instability from HVDC link system  

SciTech Connect

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.

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

1995-12-31T23:59:59.000Z

209

Digital Bond Fact Sheet.cdr  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

cost-shared effort between industry and cost-shared effort between industry and Cyber Security Audit and Attack Detection Toolkit Cyber Security Audit and Attack Detection Toolkit Bandolier Audit Files for optimizing security configurations and the Portaledge event detection capability for energy control systems Bandolier Audit Files for optimizing security configurations and the Portaledge event detection capability for energy control systems Cyber Security for Energy Delivery Systems Electricity Delivery & Energy Reliability Project Lead: Digital Bond Partners: OSIsoft Tenable Network Security PacifiCorp Tennessee Valley Authority Other Participating Vendors: ABB AREVA Emerson Matrikon SNC Telvent Bandolier and Portaledge The Concept Bandolier-The Approach By building configuration audit and attack detection capabilities into tools already

210

Computing Schedules for Time-Triggered Control using Genetic Algorithms  

E-Print Network (OSTI)

Computing Schedules for Time-Triggered Control using Genetic Algorithms Truong Nghiem Georgios E scheduling problem for timed-triggered controllers (OSTTC) and the time complexity of the corresponding search. Keywords: Scheduling; Digital control; Genetic algorithms; 1. INTRODUCTION Digital control theory

Fainekos, Georgios E.

211

Lighting Group: Controls and Communications  

NLE Websites -- All DOE Office Websites (Extended Search)

Communications Communications Controls and Communications The Controls and Communications research activity investigates how digital technologies, such as Bluetooth, can be applied to building lighting control systems to increase building efficiency and improve occupant comfort and productivity. Projects range from embedded device networks applied to building lighting systems, to WiFi and environmental sensing and monitoring. light switch Current Projects IBECS (Integrated Building Environmental Communications System) Wireless Lighting Controls (with DUST Networks) HPCBS Advanced Digital Controls Building Control Systems Integration Completed Projects CEC Public Interest Energy Research (PIER) Projects 450 Golden Gate Project New Publications Standardizing Communication Between Lighting Devices: A Role for

212

Addressing the susceptibility of digital systems to electromagnetic interference  

SciTech Connect

This paper discusses the development of the technical basis for acceptance criteria applicable to the immunization of digital systems against electromagnetic interference (EMI). The work is sponsored by the US Nuclear Regulatory Commission and stems from the safety-related issues that need to be addressed as a result of the application of digital instrumentation and control systems in nuclear power plants. Designers of digital circuits are incorporating increasingly higher clock frequencies and lower logic level voltages, thereby leading to potentially greater susceptibility of spurious interference being misinterpreted as legitimate logic. Development of the technical basis for acceptance criteria to apply to these digital systems centers around establishing good engineering practices to ensure that sufficient levels of electromagnetic compatibility (EMC) are maintained between the nuclear power plant`s electronic and electromechanical systems. First, good EMC design and installation practices are needed to control the emissions from interference sources and thereby their impact on other nearby circuits and systems. Second, a verification and validation (V&V) program is needed to outline the EMI tests to be performed, the associated test methods to be followed, and adequate acceptance criteria to ensure that the circuit or system under test meets the recommended guidelines. V&V should be followed by periodic maintenance to assess whether the recommended EMI control practices continue to be adhered to as part of the routine operation of the nuclear power plant. By following these steps, the probability of encountering safety-related instrumentation susceptibility attributable to EMI will be greatly reduced.

Ewing, P.D.; Korsah, K. [Oak Ridge National Lab., TN (US); Antonescu, C. [Nuclear Regulatory Commission, Rockville, MD (US). Office of Nuclear Regulatory Research

1993-06-01T23:59:59.000Z

213

Addressing the susceptibility of digital systems to electromagnetic interference  

SciTech Connect

This paper discusses the development of the technical basis for acceptance criteria applicable to the immunization of digital systems against electromagnetic interference (EMI). The work is sponsored by the US Nuclear Regulatory Commission and stems from the safety-related issues that need to be addressed as a result of the application of digital instrumentation and control systems in nuclear power plants. Designers of digital circuits are incorporating increasingly higher clock frequencies and lower logic level voltages, thereby leading to potentially greater susceptibility of spurious interference being misinterpreted as legitimate logic. Development of the technical basis for acceptance criteria to apply to these digital systems centers around establishing good engineering practices to ensure that sufficient levels of electromagnetic compatibility (EMC) are maintained between the nuclear power plant's electronic and electromechanical systems. First, good EMC design and installation practices are needed to control the emissions from interference sources and thereby their impact on other nearby circuits and systems. Second, a verification and validation (V V) program is needed to outline the EMI tests to be performed, the associated test methods to be followed, and adequate acceptance criteria to ensure that the circuit or system under test meets the recommended guidelines. V V should be followed by periodic maintenance to assess whether the recommended EMI control practices continue to be adhered to as part of the routine operation of the nuclear power plant. By following these steps, the probability of encountering safety-related instrumentation susceptibility attributable to EMI will be greatly reduced.

Ewing, P.D.; Korsah, K. (Oak Ridge National Lab., TN (United States)); Antonescu, C. (Nuclear Regulatory Commission, Rockville, MD (United States). Office of Nuclear Regulatory Research)

1993-01-01T23:59:59.000Z

214

The Basics of Digital Forensics: The Primer for Getting Started in Digital Forensics, 1st edition  

Science Journals Connector (OSTI)

The Basics of Digital Forensics provides a foundation for people new to the digital forensics field. This book teaches you how to conduct examinations by discussing what digital forensics is, the methodologies used, key technical concepts and ...

John Sammons

2012-04-01T23:59:59.000Z

215

U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

84: Cisco Digital Media Manager Lets Remote Authenticated Users 84: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges January 19, 2012 - 9:00am Addthis PROBLEM: A remote authenticated user can gain elevated privileges on the target system. PLATFORM: Cisco Digital Media Manager: Version(s) 5.22 and prior, 5.2.3 ABSTRACT: The system does not properly validate unreferenced URLs. REFERENCE LINKS: Vendor Advisory SecurityTracker Alert ID: 1026541 CVE-2012-0329 IMPACT ASSESSMENT: medium Discussion: Cisco Show and Share is not directly affected by this vulnerability, but a user can exploit the Cisco Digital Media Manager to gain full access to Cisco Show and Share. Impact: A remote authenticated user can send a specially crafted URL via TCP port

216

U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

4: Cisco Digital Media Manager Lets Remote Authenticated Users 4: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges January 19, 2012 - 9:00am Addthis PROBLEM: A remote authenticated user can gain elevated privileges on the target system. PLATFORM: Cisco Digital Media Manager: Version(s) 5.22 and prior, 5.2.3 ABSTRACT: The system does not properly validate unreferenced URLs. REFERENCE LINKS: Vendor Advisory SecurityTracker Alert ID: 1026541 CVE-2012-0329 IMPACT ASSESSMENT: medium Discussion: Cisco Show and Share is not directly affected by this vulnerability, but a user can exploit the Cisco Digital Media Manager to gain full access to Cisco Show and Share. Impact: A remote authenticated user can send a specially crafted URL via TCP port

217

Superconducting VAR control  

DOE Patents (OSTI)

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

Boenig, Heinrich J. (Los Alamos, NM); Hassenzahl, William V. (Piedmont, CA)

1982-01-01T23:59:59.000Z

218

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

SciTech Connect

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.

Not Available

2011-06-22T23:59:59.000Z

219

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

E-Print Network (OSTI)

is great. The time for an alliance is now. References Gantz,Digital Stewardship Alliance Charter: Enabling Collaborationforming a national stewardship alliance of committed digital

Anderson, Martha; Gallinger, Michelle; Potter, Abigail

2009-01-01T23:59:59.000Z

220

The digital preservation facility  

Science Journals Connector (OSTI)

Critical listening should be an essential part of all archiving and restoration facilities quality control. We review the priorities and requirements for listening spaces ranging from the individual collector and small community archives to large?scale facilities. Examples discussed include the Library of Congress Culpepper facility university libraries and commercial facilities. Adapting listening rooms to the requirements of n?channel audio are discussed. Public recommendations of the Sound Preservation Board of the Library of Congress will be reviewed.

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Direct costing  

E-Print Network (OSTI)

oau 5e reduced. Under the same oonOitions, even ~Me on a bread scale entails not mere1y the conduct of the direct oyeraticns cf yrccessing the materials into finished products, but also the performance of auxiliary functions. these may 'ba power y... purposes have been advanced as folkway le Most of a o03RyaxO' 8 products Grc usual13r sold at prices which oovex' full product costs y plus 861ling a%el administrative expenses, plus normal profit. The inventoi~ valuate. on should be consistent...

Browning, Donald Bullock

2012-06-07T23:59:59.000Z

222

Digital Networks: Electronics and Beyond  

NLE Websites -- All DOE Office Websites (Extended Search)

Digital Networks: Electronics and Beyond Digital Networks: Electronics and Beyond Speaker(s): Bruce Nordman Date: January 9, 2009 - 12:00pm Location: 90-3122 For the last five years or so, I have made digital networks my prime research focus. For the most part, this has concentrated on IT networks as with PCs and servers, and the network interfaces and network devices that enable it. I will outline how to think about networks as they collide with energy use and efficiency, and report on the several projects we have underway in this area. Networks have a unique relationship to industry standards and I will outline some of the challenges and opportunities this brings. In addition, we have the looming prospect of the networking of many non-electronic loads in buildings (particularly lighting and climate

223

Digital noise generators using one-dimensional chaotic maps  

SciTech Connect

This work shows how to improve the statistical distribution of signals produced by digital noise generators designed with one-dimensional (1-D) chaotic maps. It also shows that in a digital electronic design the piecewise linear chaotic maps (PWLCM) should be considered because they do not have stability islands in its chaotic behavior region, as it occurs in the case of the logistic map, which is commonly used to build noise generators. The design and implementation problems of the digital noise generators are analyzed and a solution is proposed. This solution relates the output of PWLCM, usually defined in the real numbers' domain, with a codebook of S elements, previously defined. The proposed solution scheme produces digital noise signals with a statistical distribution close to a uniform distribution. Finally, this work shows that it is possible to have control over the statistical distribution of the noise signal by selecting the control parameter of the PWLCM and using, as a design criterion, the bifurcation diagram.

Martínez-Ńonthe, J. A; Palacios-Luengas, L.; Cruz-Irisson, M.; Vazquez Medina, R. [Instituto Politécnico Nacional, ESIME-Culhuacan, Santa Ana 1000, 04430, D.F. (Mexico); Díaz Méndez, J. A. [Instituto Nacional de Astrofísica, Óptica y Electrónica, Luis Enrique Erro 1, Tonantzintla, Puebla (Mexico)

2014-05-15T23:59:59.000Z

224

A digital tachometer  

E-Print Network (OSTI)

, and the reset relay that will now be descr1bed. The gate tube and 1ts driving tube are shown in Figure 7. The gate tube itself 1s a pentode developed specifically for this type of service. The characterist1cs of t? e suppressor grfd of t?is tu?e allows... period is used to trigger a monostable mult1vibrator which causes the relay control pentode to conduct and pickup the reset relay. The t1me provided by the monostable mult1- vibrator's cycle is approximately 70 m1111-seconds which is more than enough...

DeSutter, David H

2012-06-07T23:59:59.000Z

225

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

DOE Patents (OSTI)

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.

Warburton, W.K.; Hubbard, B.

1997-11-04T23:59:59.000Z

226

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

DOE Patents (OSTI)

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.

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

1997-01-01T23:59:59.000Z

227

Understanding human mobility patterns from digital traces  

E-Print Network (OSTI)

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 ...

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

2013-01-01T23:59:59.000Z

228

A Personalized Collaborative Digital Library Environment  

Science Journals Connector (OSTI)

We envisage a Digital Library not only as an information resource where ... but also as a collaborative working and meeting space. We present a personalized collaborative Digital Library environment, where users ...

M. Elena Renda; Umberto Straccia

2002-01-01T23:59:59.000Z

229

Harnessing the Currents of the Digital Ocean  

Science Journals Connector (OSTI)

The digital revolution concerns the shift in human history that allows the transformation of experiential inputs and work products into digital form that can be immediately collected, modified, moved, stored, ...

John T. Behrens; Kristen E. DiCerbo

2014-01-01T23:59:59.000Z

230

TDS3000C Series Digital Phosphor Oscilloscopes  

E-Print Network (OSTI)

xx TDS3000C Series Digital Phosphor Oscilloscopes ZZZ User Manual *P071230802* 071-2308-02 #12;#12;TDS3000C Series Digital Phosphor Oscilloscopes ZZZ User Manual xx www.tektronix.com 071-2308-02 #12

Kleinfeld, David

231

An Overview of Digital Audio Workstations  

Science Journals Connector (OSTI)

Since the late 1980s, the digital audio workstation (DAW) has virtually revolutionized the routine editing, signal processing, and assembly of digital program material in the postproduction environment. The DAW r...

John M. Eargle

1996-01-01T23:59:59.000Z

232

Low Bit Rate Digital Coding of Audio  

Science Journals Connector (OSTI)

Low bit rate digital coding, also known as perceptual coding, makes use of several psychoacoustical masking phenomena to reduce the bit rate required to transmit digital audio. The need for such te...

John M. Eargle

1996-01-01T23:59:59.000Z

233

KUKA.CNC — A Direct Approach  

Science Journals Connector (OSTI)

Direct processing of G-code with the integrated CNC kernel on the robot controller is now possible. KUKA Roboter GmbH has developed KUKA.CNC that can be used to execute DIN 66025-compliant CNC programmes directly...

Alexander Bay

2012-12-01T23:59:59.000Z

234

Digital Money A divine gift  

E-Print Network (OSTI)

Digital Money A divine gift or Satan's malicious tool? J¨org Kienzle jkienzle@di.epfl.ch Adrian #12; #12; Contents 1 Prolog 1 2 Introduction 1 3 About Money 2 3.1 The History Of Money Of A Money Economy : : : : : : : : : : : : : : : : : : : : 3 3.4 Money Standard

Perrig, Adrian

235

Digital Money A divine gift  

E-Print Network (OSTI)

Digital Money A divine gift or Satan's malicious tool? Jorg Kienzle jkienzle@di.ep .ch Adrian Prolog 1 2 Introduction 1 3 About Money 2 3.1 The History Of Money Of A Money Economy : : : : : : : : : : : : : : : : : : : : 3 3.4 Money Standard

Perrig, Adrian

236

Costume construction for digital characters  

E-Print Network (OSTI)

This paper attempts to gauge how effectively two top-of-the-line cloth simulation programs - MIRALab's MIRA Cloth and Alias/Wavefront's Maya Cloth - could be used by an artist trained in theatrical costume construction to create a digital costume...

Ellison, Barbara Lynn

2012-06-07T23:59:59.000Z

237

Digital Gas Inc | Open Energy Information  

Open Energy Info (EERE)

Inc Inc Jump to: navigation, search Name Digital Gas Inc Place Dallas, Texas Sector Solar Product Company with a number of subsidiaries involved in mining, solar power, waste burning, energy saving, farming and electronics. Coordinates 32.778155°, -96.795404° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.778155,"lon":-96.795404,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

238

Digital filtering in a disease detection system  

SciTech Connect

A low-pass, nonrecursive digital filter has been designed to process data in an automated enzyme immunoassay system. The software implemented filter has been installed in the Intel 80/10 system controller. A low-speed sample rate of three samples per second allowed the filter algorithm to be programmed in the high-level FORTRAN language with a resultant execution speed of 0.6 seconds per day array. Fourier techniques are used to derive a zero phase shift filter algorithm from a frequency domain prototype. The resulting alogrithm is modified by a Hamming window to reduce transients and Gibbs phenomenon oscillations. Observations on the effectiveness of the filter under full system operation indicate a 90% data recovery rate.

Brown, R.R.

1983-01-01T23:59:59.000Z

239

Portable digital libraries on an ipod  

Science Journals Connector (OSTI)

This paper describes the facilities we built to run a self-contained digital library on an iPod. The digital library software used was the open source package Greenstone, and the paper highlights the technical problems that were encountered and solved. ... Keywords: greenstone, ipod, mobile digital libraries, open source

David Bainbridge; Steve Jones; Sam McIntosh; Matt Jones; Ian H. Witten

2008-06-01T23:59:59.000Z

240

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

E-Print Network (OSTI)

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

Neumann, GĂĽnter

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Streamlining the additive manufacturing digital spectrum: A systems approach  

Science Journals Connector (OSTI)

Abstract Additive manufacturing (AM) promises great potential benefits for industrial manufacturers who require low volume and functional, highly complex, end-use products. Commercial adoption of AM has been slow due to factors such as quality control, production rates, and repeatability. However, given AM's potential, numerous research efforts are underway to improve the quality of the product realization process. A major area of opportunity is to complement existing efforts with advancements in end-to-end digital implementations of AM processes. New paradigms are needed to support more efficient and consistent design-to-product transformations. Systematically configured digital implementations would facilitate informational transformations through standard interfaces, streamlining the AM digital spectrum. Here, we propose the development of a federated, information systems architecture for additive manufacturing. We establish an information requirements workflow for streamlining information throughput during product realization. The architecture is delivered through the development of a solution stack, including the identification of areas where advancements in information representations will have the highest impact. The architecture will specify the stages of the product realization process, and the interfaces needed to link those stages together. Common data structures and interfaces will allow developers and end users of additive manufacturing technologies to simplify, coordinate, validate, and verify end-to-end digital implementations.

Duck Bong Kim; Paul Witherell; Robert Lipman; Shaw C. Feng

2014-01-01T23:59:59.000Z

242

Digital quantum simulation of fermionic models with a superconducting circuit  

E-Print Network (OSTI)

Simulating quantum physics with a device which itself is quantum mechanical, a notion Richard Feynman originated, would be an unparallelled computational resource. However, the universal quantum simulation of fermionic systems is daunting due to their particle statistics, and Feynman left as an open question whether it could be done, because of the need for non-local control. Here, we implement fermionic interactions with digital techniques in a superconducting circuit. Focusing on the Hubbard model, we perform time evolution with constant interactions as well as a dynamic phase transition with up to four fermionic modes encoded in four qubits. The implemented digital approach is universal and allows for the efficient simulation of fermions in arbitrary spatial dimensions. We use in excess of 300 single-qubit and two-qubit gates, and reach global fidelities which are limited by gate errors. This demonstration highlights the feasibility of the digital approach and opens a viable route towards analog-digital quantum simulation of interacting fermions and bosons in large-scale solid state systems.

R. Barends; L. Lamata; J. Kelly; L. García-Álvarez; A. G. Fowler; A. Megrant; E. Jeffrey; T. C. White; D. Sank; J. Y. Mutus; B. Campbell; Yu Chen; Z. Chen; B. Chiaro; A. Dunsworth; I. -C. Hoi; C. Neill; P. J. J. O'Malley; C. Quintana; P. Roushan; A. Vainsencher; J. Wenner; E. Solano; John M. Martinis

2015-01-30T23:59:59.000Z

243

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

SciTech Connect

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.

Romberger, J.

2014-11-01T23:59:59.000Z

244

Move Frame Scheduling and Mixed SchedulingAllocation for the Automated Synthesis of Digital Systems y  

E-Print Network (OSTI)

steps: 1) Data path synthe­ sis (operation scheduling and hardware allocation), and 2) Control path design. In the scheduling phase, operations are assigned to the appropriate control steps. The allocaMove Frame Scheduling and Mixed Scheduling­Allocation for the Automated Synthesis of Digital

Nourani, Mehrdad

245

ECE/CS 3700 --Digital System Design Final Project --A Simple UART  

E-Print Network (OSTI)

elements. This is the big picture for digital systems: finite state controllers controlling data paths wires are required and what their meaning is related to the data transfer, the electrical circuit should be able to accept serial ASCII data from a terminal (when you press a key on the terminal

Kalla, Priyank

246

Going Digital: Building eHealth and mHealth Interventions Society of Behavioral Medicine Conference 2012  

E-Print Network (OSTI)

Going Digital: Building eHealth and mHealth Interventions Society of Behavioral Medicine Conference control principles to inform the design of adaptive interventions: a conceptual introduction. Drug

Chisholm, Rex L.

247

Insights Gained for Updating an Analog I&C System to a Digital System  

SciTech Connect

Licensees at both Nuclear Power Plants (NPPs) and Non-Power Reactors (NPRs) 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 over analog. Digital I&C systems can range from experimental systems for reactor control research (at NPRs), to measurement and display systems, to complete reactor console replacements. Because of the increasing difficulty in finding spare parts for their original analog I&C systems, many licensees have begun or have plans to upgrade, refurbish, or replace their old analog I&C systems with digital systems. The perception is that upgrading to a digital I&C system will solve all of a facility s obsolescence problems. However, licensees need to be aware of several issues associated with upgrading to a digital system including obsolescence of the digital system (hardware and software) because of the short product life cycle and the associated cost to acquire, store, and maintain a long-term supply of spare parts. Configuration management and cyber security are also vitally important for any upgrade. Further, it must be recognized that the introduction of software and microprocessors could create new failure mechanisms, such as software errors and increased susceptibility to electromagnetic interference. In fact, experience has shown that these failure mechanisms may cause the reactor to malfunction in a way not previously considered. Thus, a conversion from analog to digital I&C systems solves some problems while potentially introducing others. Recognition of the additional risks coupled with good design, engineering, review, and testing can identify and minimize these risks.

Adams, A. [U.S. Nuclear Regulatory Commission; Carte, N. [U.S. Nuclear Regulatory Commission; Hardesty, Duane [U.S. Nuclear Regulatory Commission; Hardin, LeRoy A [U.S. Nuclear Regulatory Commission; Wilson, Thomas L [ORNL

2012-01-01T23:59:59.000Z

248

Digital marketing and social media: Why bother?  

Science Journals Connector (OSTI)

Abstract Changes in consumer behavior require firms to rethink their marketing strategies in the digital domain. Currently, a significant portion of the associated research is focused more on the customer than on the firm. To redress this shortcoming, this study adopts the perspective of the firm to facilitate an understanding of digital marketing and social media usage as well as its benefits and inhibitors. The second generation of Internet-based applications enhances marketing efforts by allowing firms to implement innovative forms of communication and co-create content with their customers. Based on a survey of marketing managers, this article shows that firms face internal and external pressures to adopt a digital presence in social media platforms. Firms’ digital marketing engagement can be categorized according to perceived benefits and digital marketing usage. To improve digital marketing engagement, marketers must focus on relationship-based interactions with their customers. This article demonstrates how some firms are already accomplishing just that.

Maria Teresa Pinheiro Melo Borges Tiago; José Manuel Cristóvăo Veríssimo

2014-01-01T23:59:59.000Z

249

Hormone-Inspired Self-Organization and Distributed Control of Robotic Swarms  

Science Journals Connector (OSTI)

The control of robot swarming in a distributed manner is a difficult problem because global behaviors must emerge as a result of many local actions. This paper uses a bio-inspired control method called the Digital Hormone Model (DHM) to control the tasking ... Keywords: Digital Hormones, distributed control, modular robots, robot swarms, self organization, self reconfiguration

Wei-Min Shen; Peter Will; Aram Galstyan; Cheng-Ming Chuong

2004-07-01T23:59:59.000Z

250

Behavioral modeling and digital calibration of pipeline analog to digital converters  

E-Print Network (OSTI)

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...

Bilhan, Erkan

2012-06-07T23:59:59.000Z

251

Information Visualization Within a Digital Video Library  

Science Journals Connector (OSTI)

The Informedia Digital Video Library contains over a thousand hours of video, consuming over a terabyte of disk space. This paper summarizes the multimedia abstractions used...

Michael Christel; David Martin

1998-11-01T23:59:59.000Z

252

Perceptual-components architecture for digital video  

Science Journals Connector (OSTI)

A perceptual-components architecture for digital video partitions the image stream into signal components in a manner analogous to that used in the human visual system. These...

Watson, Andrew B

1990-01-01T23:59:59.000Z

253

Axial Tomography from Digitized Real Time Radiography  

DOE R&D Accomplishments (OSTI)

Axial tomography from digitized real time radiographs provides a useful tool for industrial radiography and tomography. The components of this system are: x-ray source, image intensifier, video camera, video line extractor and digitizer, data storage and reconstruction computers. With this system it is possible to view a two dimensional x-ray image in real time at each angle of rotation and select the tomography plane of interest by choosing which video line to digitize. The digitization of a video line requires less than a second making data acquisition relatively short. Further improvements on this system are planned and initial results are reported.

Zolnay, A. S.; McDonald, W. M.; Doupont, P. A.; McKinney, R. L.; Lee, M. M.

1985-01-18T23:59:59.000Z

254

Digital Power Capital LLC | Open Energy Information  

Open Energy Info (EERE)

Power Capital LLC Jump to: navigation, search Name: Digital Power Capital LLC Place: Greenwich, Connecticut Zip: 6830 Product: A private equity firm focused on new technologies...

255

Institutional Controls  

NLE Websites -- All DOE Office Websites (Extended Search)

Institutional Controls Institutional Controls Many major Federal laws (e.g., Atomic Energy Act (AEA), Resource Conservation Recovery Act (RCRA), Comprehensive Environmental Response, Compensation and Liability Act (CERCLA)), Executive Orders, regulations and various other drivers influence the use of institutional controls at DOE sites. Some drivers directly authorize or require the use of institutional controls, while others do not. DOE also uses institutional controls when no specific statutory requirement exists to supplement active remediation, pollution control, public and resource protection, and physical security, or to bolster the integrity of engineered remedies. DOE and its predecessor agencies have conducted activities for over 50 years, using land ownership and access control, environmental monitoring and surveillance, and other tools to support protection efforts at operational and inactive facilities, including radioactive waste burial grounds.

256

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

DOE Patents (OSTI)

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 is disclosed. 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. 13 figs.

Warburton, W.K.; Hubbard, B.

1999-02-09T23:59:59.000Z

257

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

DOE Patents (OSTI)

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.

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

1999-01-01T23:59:59.000Z

258

Replacing ESP controls brings large utility units into compliance  

SciTech Connect

This article examines the effect of retrofitting an electrostatic precipitator (ESP) digital control system on the emissions compliance of a large utility unit. The topics of the article include evaluation of ESP performance, determination of course of action, unit 1 and 2 installation of a digital control system, and results to emissions and performance of the ESP.

Hack, P. (Baltimore Gas and Electric Co., Lusby, MD (United States))

1994-05-01T23:59:59.000Z

259

Fuel control system  

SciTech Connect

A fuel control system is described comprising: a fuel rack movable in opposite fuel-increasing and fuel-decreasing directions; a rack control member movable in opposite fuel-increasing and fuel-decreasing directions; servo system means for moving the fuel rack in response to movement of the rack control member an electrically energizable member movable in opposite fuel-increasing and fuel-decreasing directions, the electrically energizable member being urged to move in its fuel-decreasing direction when energized; first coupling means for connecting the electrically energizable member to the rack control member to move the rack control member in its fuel-decreasing direction in response to movement of the electrically energizable member in its fuel-decreasing direction; a mechanical governor control having a member movable in opposite fuel-increasing and fuel-decreasing directions; second coupling means for connecting the mechanical governor to the rack control member to move the rack control member in its fuel-decreasing direction in response to movement of the mechanical governor member in its fuel-decreasing direction; bias means for biasing the rack control member to move in its fuel-increasing direction.

Staniak, W.A.; Samuelson, R.E.; Moncelle, M.E.

1986-10-14T23:59:59.000Z

260

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

DOE Patents (OSTI)

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.

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

2014-11-11T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Superconducting VAR control. [Patent application  

DOE Patents (OSTI)

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.

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

1980-12-05T23:59:59.000Z

262

A Robust Model Control for Dynamic Systems  

Science Journals Connector (OSTI)

Analytical methods of polynomial algebra, heuristic techniques, and digital modeling are used to study the robustness domain of linear dynamic systems with model “input–output” controllers as a function of the mutual locations of zeros ...

S. V. Tararykin; V. V. Tyutikov

2002-05-01T23:59:59.000Z

263

The generative mechanisms of digital infrastructure evolution  

Science Journals Connector (OSTI)

The current literature on digital infrastructure offers powerful lenses for conceptualizing the increasingly interconnected information system collectives found in contemporary organizations. However, little attention has been paid to the generative ... Keywords: adoption, case study, case survey, configuration theory, critical realism, digital infrastructure, generative mechanism, information infrastructure, innovation, multimethod, scaling

Ola Henfridsson, Bendik Bygstad

2013-09-01T23:59:59.000Z

264

Addressable Advertising on Digital Television Vincent Dureau  

E-Print Network (OSTI)

Addressable Advertising on Digital Television Vincent Dureau Chief Technology Officer, OpenTV 275 of digital technology is having a profound effect on television advertising. While television advertising costs are increasing, its efficiency is decreasing. The traditional models for advertising on television

Masthoff, Judith

265

Digital Forensic Readiness: Are We There Yet?  

E-Print Network (OSTI)

Digital Forensic Readiness: Are We There Yet? Antonis Mouhtaropoulos, Chang-Tsun Li Department.co.za Abstract--Digital Forensic Readiness is defined as the pre- incident plan that deals with an organization for a common forensic readiness standard. This article reviews a number of key initiatives in order to point

Li, Chang-Tsun

266

Digitally Assisted and Hybrid Architectures for RF Transceivers in  

E-Print Network (OSTI)

! #12;15 Digitally assisted CFB, part I · Slowly step through all symbols, and fill LUT. #12;16 Digitally assisted CFB, part II · Transmit using open-loop digital predistortion. · Retrain as needed. #12

Dawson, Joel

267

Federal Digital Strategy | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Federal Digital Strategy Federal Digital Strategy Federal Digital Strategy New expectations require the Federal Government to be ready to deliver and receive digital information and services anytime, anywhere and on any device. It must do so safely, securely, and with fewer resources. To build for the future, the Federal Government has developed a Digital Strategy that embraces the opportunity to innovate more with less, and enables entrepreneurs to better leverage government data to improve the quality of services to the American people. The Energy Department has responded to this challenge through key initiatives that make high-value data sets available through API's that allow programmers to use data to reveal new opportunities and trends, websites that follow best practices for mobile design, and applications

268

Federal Digital Strategy | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Federal Digital Strategy Federal Digital Strategy Federal Digital Strategy New expectations require the Federal Government to be ready to deliver and receive digital information and services anytime, anywhere and on any device. It must do so safely, securely, and with fewer resources. To build for the future, the Federal Government has developed a Digital Strategy that embraces the opportunity to innovate more with less, and enables entrepreneurs to better leverage government data to improve the quality of services to the American people. The Energy Department has responded to this challenge through key initiatives that make high-value data sets available through API's that allow programmers to use data to reveal new opportunities and trends, websites that follow best practices for mobile design, and applications

269

Requesting a Digital ID | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Requesting a Digital ID Requesting a Digital ID Requesting a Digital ID Step One - Registering with MIS To request a DOE Digital Identity you must first register in DOE's Management Information System (MIS) by going to https://mis.doe.gov, selecting "Requesting Access" and following the onscreen instructions. Note: DOE Federal employees are already registered and do not need to complete this step, they may skip to step 2. During the registration process you will be required to search for, and select, a DOE sponsor. Your DOE sponsor is the DOE federal employee that is certifying that you have a recognized relationship with the Department and have a valid need for a DOE Digital Identity. For contractors this person is often your Contract Task Manager, Contracting Officer's Representatives

270

Optical analog-to-digital converter  

DOE Patents (OSTI)

An optical analog-to-digital converter (ADC) is disclosed which converts an input optical analog signal to an output optical digital signal at a sampling rate defined by a sampling optical signal. Each bit of the digital representation is separately determined using an optical waveguide interferometer and an optical thresholding element. The interferometer uses the optical analog signal and the sampling optical signal to generate a sinusoidally-varying output signal using cross-phase-modulation (XPM) or a photocurrent generated from the optical analog signal. The sinusoidally-varying output signal is then digitized by the thresholding element, which includes a saturable absorber or at least one semiconductor optical amplifier, to form the optical digital signal which can be output either in parallel or serially.

Vawter, G. Allen (Corrales, NM); Raring, James (Goleta, CA); Skogen, Erik J. (Albuquerque, NM)

2009-07-21T23:59:59.000Z

271

Digital Forensics for Legal Professionals: Understanding Digital Evidence From The Warrant To The Courtroom, 1st edition  

Science Journals Connector (OSTI)

Digital Forensics for Legal Professionals provides you with a guide to digital technology forensics in plain English. In the authors' years of experience in working with attorneys as digital forensics experts, common questions arise again and ...

Larry Daniel; Lars Daniel

2011-10-01T23:59:59.000Z

272

Sunlight Direct | Open Energy Information  

Open Energy Info (EERE)

Direct Direct Jump to: navigation, search Name Sunlight Direct Place San Diego, California Zip 92128 Sector Solar Product Developed a system that tracks and concentrates solar energy for distributed power generation Website http://www.sunlight-direct.com Coordinates 33.0013938°, -117.0735241° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.0013938,"lon":-117.0735241,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

273

T-724: Microsoft Security Advisory: Fraudulent digital certificates...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

24: Microsoft Security Advisory: Fraudulent digital certificates could allow spoofing T-724: Microsoft Security Advisory: Fraudulent digital certificates could allow spoofing...

274

DIGITAL GAIN ERROR CORRECTION TECHNIQUE  FOR 8-BIT PIPELINE ADC.  

E-Print Network (OSTI)

?? An analog-to-digital converter (ADC) is a link between the analog and digital domains and plays a vital role in modern mixed signal processing systems.… (more)

javeed, khalid

2010-01-01T23:59:59.000Z

275

Sílabo del curso de Marketing y Publicidad Digital.  

E-Print Network (OSTI)

??El curso de Marketing y Publicidad Digital es de naturaleza teórico-práctico y tiene como propósito aportar conocimientos del medio digital, herramientas, técnicas y estrategias especializadas… (more)

[No author

2014-01-01T23:59:59.000Z

276

Digital Transfer Growth of Patterned 2D Metal Chalcogenides by...  

NLE Websites -- All DOE Office Websites (Extended Search)

for Energy Digital Transfer Growth of Patterned 2D Metal Chalcogenides by Confined Nanoparticle Evaporation October 28, 2014 (a) Illustration of the digital transfer growth...

277

Interlinking related diverse media in a digital library  

E-Print Network (OSTI)

.1. Technology Components The following components are used in the implementation of the digital library system: 1. JSP and Servlets are used to build the user interface for the system. 2. Tomcat is used as the servlet and JSP container and is responsible... for executing the servlets and the JSPs, generating dynamic web pages [3]. 3. The Struts framework is used to implement the model-view-controller architecture [2]. 4. A MySQL database and the file system are used as the storage repository [25]. 5...

Singh, Manas Sourava

2006-08-16T23:59:59.000Z

278

Diffusion across the digital divide: Assessing use of the Connecticut Digital Library (ICONN) in K-12 schools in Connecticut.  

E-Print Network (OSTI)

??State digital libraries are manifestations of the diffusion of technology that has provided both access to and delivery of digital content. Whether the content is… (more)

Bogel, Gayle

2008-01-01T23:59:59.000Z

279

Technology Reinvestment Program/Advanced ``Zero Emission'' Control Valve (Phase II)  

SciTech Connect

The objectives of this effort are to determine, develop and demonstrate the feasibility of significantly reducing the cost and expanding the applications for a family of Advanced Zero Emissions Control Valves that meets the fugitive emissions requirements of the 1990 Amendments to the Clean Air Act. This program is a direct technology spin-off from the valve technology that is critical to the US Navy's Nuclear Powered Fleet. These zero emissions valves will allow the Hydrocarbon and Chemical Processing Industries, etc., to maintain their competitiveness and still meet environmental and safety requirements. Phase 2 is directed at refining the basic technologies developed during Phase 1 so that they can be more readily selected and utilized by the target market. In addition to various necessary certifications, the project will develop a full featured digital controller with ``smart valve'' growth capability, expanding valve sizes/applications and identifying valve materials to permit applications in severe operational environments.

J. Napoleon

1998-12-01T23:59:59.000Z

280

A DIGITAL CONTROL SYSTEM FOR OPTIMAL OXYGEN TRANSFER  

E-Print Network (OSTI)

APPENDIX E: TECHNOLOGY TRANSFER INFORMATION Prepared For: California Energy Commission Public Interest of California, Los Angeles Utility Technology Associates January 2010 CEC-500-2009-076-APE #12;#12;Prepared By salinity, etc.) Alpha factor () ­ water quality estimate (kLa Process water / kLa Clean water) #12

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

A DIGITAL CONTROL SYSTEM FOR OPTIMAL OXYGEN TRANSFER  

E-Print Network (OSTI)

, Los Angeles Utility Technology Associates January 2010 CEC-500-2009-076-APB #12;#12;Prepared By 6042B N. Irwindale Avenue Irwindale, CA 91702 Prepared by: Utility Technology Associates 14988 El ................................................... 18 6.2 More recent point source DO monitoring ........................... 19 6.3 Improved on-line DO

282

Digital Control of Resonant Converters: Enhancing Frequency Resolution by Dithering  

E-Print Network (OSTI)

-resolution frequency drive when the quality factor of the network is high or to avoid limit cycle oscillations resolution enhancer for resonant network drive. I. INTRODUCTION In a variety of applications, variable ballasts piezoelectric devices) [1-3]. In such cases, the frequency resolution of the drive is crucial

283

Experience in the installation of a microprocessor system for controlling converter units of the Vyborg substation  

Science Journals Connector (OSTI)

The experience in the installation of modern digital systems for controlling converter units at the Vyborg converter substation on the basis of advanced microprocessor devices...

K. B. Gusakovskii; E. Yu. Zmaznov; S. V. Katantsev…

2006-01-01T23:59:59.000Z

284

Directives Quarterly Updates  

Directives, Delegations, and Requirements

Listings of new Justification Memoranda and new or revised Directives that have been posted to the DOE Directives, Delegations, and Requirements Portal. Updated quarterly.

285

Another face of DIRECT  

E-Print Network (OSTI)

authors, see for example, tree-Direct [5]. This paper ..... [4] J.M. Gablonsky, Modifications of the DIRECT Algorithm, Ph.D. Thesis, North Carolina State. University ...

chiter

2007-08-01T23:59:59.000Z

286

An investigation of the role of digital libraries in bridging the digital divide in developing Arab countries: the case of Yarmouk University, Jordan.  

E-Print Network (OSTI)

??Developing countries are often said to suffer the disadvantages created by a ‘digital divide’ – the gap between the digitally advantaged and the digitally disadvantaged.… (more)

Obeidat, Othman

2009-01-01T23:59:59.000Z

287

Multilayer Hybrid Microfluidics: A Digital-to-Channel Interface for Sample Processing and Separations  

Science Journals Connector (OSTI)

Multilayer Hybrid Microfluidics: A Digital-to-Channel Interface for Sample Processing and Separations ... (7-9) On-chip microvalves(10) offer some relief from this problem; however, the complicated fabrication and control infrastructure required for this technology limits their widespread adoption and use. ...

Michael W. L. Watson; Mais J. Jebrail; Aaron R. Wheeler

2010-07-15T23:59:59.000Z

288

Digital electronic bone growth stimulator  

DOE Patents (OSTI)

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.

Kronberg, J.W.

1993-01-01T23:59:59.000Z

289

Digital Construction Platform: A Compound Arm Approach  

E-Print Network (OSTI)

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 ...

Spielberg, Nathan A.

2014-01-01T23:59:59.000Z

290

Ultrafast superconductor digital electronics: RSFQ technology roadmap  

Science Journals Connector (OSTI)

This paper gives a brief review of the Rapid Single-Flux-Quantum (RSFQ) logic family which leads the race toward practical ultrafast superconductor digital electronics, with an attempt to sketch a “roadmap” for t...

Konstantin K. Likharev

1996-01-01T23:59:59.000Z

291

Channelized voice over digital subscriber line  

E-Print Network (OSTI)

The objective of this article is to present a promising voice over digital subscriber line (VoDSL) solution: an alternative method that uses physical layer transportation to provide channelized VoDSL (CVoDSL). This article ...

Habib, A.; Saiedian, Hossein

2002-10-01T23:59:59.000Z

292

Digital fabrication in the architectural design process  

E-Print Network (OSTI)

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 ...

Seely, Jennifer C. K., 1975-

2004-01-01T23:59:59.000Z

293

Digital holographic imaging of aquatic species  

E-Print Network (OSTI)

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 ...

Domínguez-Caballero, José Antonio

2006-01-01T23:59:59.000Z

294

Model-Based Troubleshooting of Digital Systems  

E-Print Network (OSTI)

This thesis describes a methodology, a representation, and an implemented program for troubleshooting digital circuit boards at roughly the level of expertise one might expect in a human novice. Existing methods for ...

Hamscher, Walter Charles

1988-08-01T23:59:59.000Z

295

Blood supply of the digital sheath  

Science Journals Connector (OSTI)

Summary One hundred upper extremities from fresh human cadavers aged 20 to 80 years were injected with coloured latex or Indian ink and gelatin. Under the dissecting microscope two main and one occasional source of vascularization of the digital sheath were identified. Originating from the digitopalmar arches, from the proper palmar digital arteries and occasionally from the arcus palmaris superficialis, a complex arterial system supplies the various parts of the digital sheath. The best vascularized area is the floor of the sheath, while the pulleys and the palmar surface of the sheath are less well vascularized. These data may be of interest to those involved in reconstruction of the tendons of the digital flexor muscles.

S. Gajisin; M. Bednarkiewicz; A. Zbrodowski

1998-01-01T23:59:59.000Z

296

The Digital Companion Project Daniel Drew Turner  

E-Print Network (OSTI)

of InformationMay 2011 #12;.......................................................................Abstract! 2 ...............Theoretical Foundations and Related Work! 8 .....................................................PARTICIPATORY .........................................................REFERENCES! 28 #12;Abstract The KQED Digital Companion explores the design of a computer-mediated information

Militzer, Burkhard

297

An Automated Method for Digitizing Color Thematic Maps  

E-Print Network (OSTI)

contained on an- alog maps into digital format. Traditionally, analog maps have been input into GIS through for converting thematic information on large color analog maps into digital GIS coverages using standard image on the resulting digital images to pro- duce digital thematic maps for GIS analysis. Post classification procedures

Lawrence, Rick L.

298

BIOMEDICAL APPLICATIONS OF DIGITAL AUTORADIOGRAPHY WITH A MWPC  

E-Print Network (OSTI)

LBL-13772 Biomedical Applications of Digital Autoradiographya very useful detector for biomedical applications. Compared

Bellazzini, R.

2010-01-01T23:59:59.000Z

299

Detection of frame deletion for digital video forensics  

Science Journals Connector (OSTI)

The abundance of digital video forms a potential piece of evidence in courtrooms. Augmenting subjective assessment of digital video evidence by an automated objective assessment helps increase the accuracy of deciding whether or not to admit the digital ... Keywords: Digital forensics, Frame deletion, Video compression

Tamer Shanableh

2013-12-01T23:59:59.000Z

300

Foreign Direct Investment  

Gasoline and Diesel Fuel Update (EIA)

Investment Investment Foreign Direct Investment Foreign Direct Investment Foreign Direct Investment in U.S. Energy in U.S. Energy in U.S. Energy in U.S. Energy in 1999 in 1999 in 1999 in 1999 June 2001 ii iii Contents Foreign Affiliates' Role in U.S. Energy Industry Operations ..............................................................................1 Foreign Direct Investment: The International Transactions Accounts ..............................................................8 U.S. Companies' Direct Investment Abroad in Energy ......................................................................................14 Conclusion...............................................................................................................................................................19

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Digital Sensors Digital ports range from dgtl1 to dgtl12.  

E-Print Network (OSTI)

Digital Sensors Digital ports range from dgtl1 to dgtl12. Bumper or limit switch: (to be placed at the top of the program) #pragma config(Sensor, dgtl1, touchSensor, sensorTouch) (in the body of the program) int sensor_value; sensor_value = SensorValue(touchSensor); Bumper and Limit Switch

Beer, Randall D.

302

Analog circuit for controlling acoustic transducer arrays  

DOE Patents (OSTI)

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.

Drumheller, Douglas S. (Cedar Crest, NM)

1991-01-01T23:59:59.000Z

303

Direct/Indirect Costs  

Directives, Delegations, and Requirements

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.

1997-03-28T23:59:59.000Z

304

Directives System Manual  

Directives, Delegations, and Requirements

This Manual provides detailed requirements to supplement DOE O 251.1A, Directives System, dated 1-30-98.

1998-01-30T23:59:59.000Z

305

Discussion the Traceability of Quantity Value of Digital Watthour Meter  

Science Journals Connector (OSTI)

To resolve the traceability of quantity value and calibration of digital watt-hour meter, in this paper introduced working principium of digital electric power metering system briefly, and analyzed the main origin of error from the theory of digital watt-hour meter and its calibration device. This paper also proposed new verification method of digital watt-hour meter calibration device and project of digital watt-hour meter traceability of quantity value. The method is used in digital signal generator calibration. The traceability project is traceability to the national primary standard which is corresponding to the device using in the method. The project in this paper, which is figure out verification and traceability of quantity value from main origin of error, provides a reasonable approach to traceability of digital watt-hour meter and a useful reference to decriminalization of digital metrology. Meantime, the scheme provides strong technical support for construction of digital transformer substation and “Smart Strong Grid”.

Meng Xiangfu; Liu Yuchao; Wang Yuhua

2012-01-01T23:59:59.000Z

306

Open architecture in control system integration  

SciTech Connect

Open architecture offers the manufacturing community a number of advantages in the integration of future machine control systems. Among these advantages is the ability to upgrade and take advantage of innovative new control strategies. A key enabling technology in open architecture control systems is the digital signal processor (DSP). DSPs can be used to provide a complete control system or can enhance the computational capability of larger control systems. The use of DSPs in the integration of open architecture control systems is discussed, including their impact on reliability and control system functionality. In addition, the role of DSPs in control system architecture is addressed.

Wysor, R.W. [Oak Ridge National Lab., TN (United States); Carnal, C.L. [Tennessee Technological Univ., Cookeville, TN (United States); Igou, R.E. [Oak Ridge Y-12 Plant, TN (United States)

1993-09-01T23:59:59.000Z

307

Digital Television and Media Innovations | Princeton Plasma Physics Lab  

NLE Websites -- All DOE Office Websites (Extended Search)

8, 2007, 4:15pm to 5:15pm 8, 2007, 4:15pm to 5:15pm Colloquia MBG Auditorium Digital Television and Media Innovations Dr. Michael A. Isnardi Sarnoff Corporation Colloquium Committee: The Princeton Plasma Physics Laboratory 2013-2014 Colloquium Committee is comprised of the following people. Please feel free to contact them by e-mail regarding any possible speakers or topics for future colloquia. Carol Ann Austin caustin@pppl.gov John Greenwald, Chair jgreenwa@pppl.gov Charles H. Skinner cskinner@pppl.gov Daren Stotler dstotler@pppl.gov Carol Ann Austin 609-243-2484 PPPL Entrance Procedures Visitor Information, Directions, Security at PPPL As a federal facility, the Princeton Plasma Physics Laboratory is operating under heightened security measures because of the events of September 11,

308

Revealing the nanoscale world: digital recreation of nanofibre images  

Science Journals Connector (OSTI)

The Perdu(e) series of images are digital paintings of nanofibre images that produce integrated, convergent, formative images by breaking down the boundaries between art and science, macroscopic and microscopic worlds, and abstraction and representation. I have added the emotional interaction between the paintings of the nanofibres and the viewers to extend the experience of creating their own creative supermicroscopic world. The Perdu(e) series is a result of images that were not reproduced images but were produced through me, as an artist, by my imagination. By passing the images through a computer, scientific technology, and my hand, this series is a new origin for art. These modified, transformed images represent living beings that can directly communicate with the spectators through the emotional interaction.

Jiyoung Kang

2013-01-01T23:59:59.000Z

309

Archives and History Office: Digital Resources  

NLE Websites -- All DOE Office Websites (Extended Search)

Resources > Digital Resources Resources > Digital Resources Digital Resources Informal History, Part 1 The Histories page provides publications that examine SLAC history or particular events, experiments, and equipment. Publications are listed in reverse chronological order (i.e. newest listed first). Edward L. Ginzton and the MARK III accelerator at Stanford University as it nears its completion in 1952. Copies of Stanford University Physics Department Project M Reports held by the SLAC Archives and History Office, including those produced by the Microwave Lab, and the High-Energy Physics Lab (HEPL) have been scanned and are now available online. Linac construction site showing curved and straight sections in rain and mud, 1963. Copies of ABA reports held by the SLAC Archives have been scanned and are now available online along with a list of ABA numbered reports relating to the development of the SLAC proposal and known to the SLAC Archives and History Office.

310

Mixed analog and digital ASIC design  

E-Print Network (OSTI)

. Design Issues 2 2 5 5 6 7 7 8 12 14 15 19 20 21 22 24 27 27 29 IV DESIGN METHODOLOGY A. Design Methodology 1. Transmission Gate Intensive Logic B. Standard Cell Design 1. I/O Pad Circuit 2. Full Adder 3. A/D Converter 4. Basic... Stack Cell 5. Logic Gates . 32 34 36 36 36 38 38 38 CHAPTER Page 6. Serial Communication Port 7. Interrupt C~enerator 8. 4 to 1 Multiplexer C. Layout Rules 1. Analog and Digital Interconnection . 2. Mixed Analog Digital Placement D...

Keskar, Shrinath A.

1992-01-01T23:59:59.000Z

311

T-711: Fraudulent Google Digital Certificates Could Allow Man...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

11: Fraudulent Google Digital Certificates Could Allow Man-in-the-Middle Attacks T-711: Fraudulent Google Digital Certificates Could Allow Man-in-the-Middle Attacks September 7,...

312

Accessing Heritage Documents according to Space Criteria within Digital Libraries  

E-Print Network (OSTI)

1 Accessing Heritage Documents according to Space Criteria within Digital Libraries Christophe information. This geographic model allows space features to be described independently of their representation, Geographic Information Retrieval and Visualization, Non-Structured Documents, Digital Libraries, Cultural

Paris-Sud XI, Université de

313

Digital Photography and the Ethics of Photo Alteration  

E-Print Network (OSTI)

, and summarizes debates surrounding specific digitally altered images and the public’s and governing bodies’ responses to these alterations. Finally, digital photography’s position as a new medium or an extension of existing photographic means is considered...

Schiller, Aschley

2008-07-18T23:59:59.000Z

314

A low-power reconfigurable analog-to-digital converter  

E-Print Network (OSTI)

This thesis presents the concept, theory and design of a low power CMOS analog-to-digital converter that can digitize signals over a wide range of bandwidth and resolution with adaptive power consumption. The converter ...

Gulati, Kush

2001-01-01T23:59:59.000Z

315

Digital Video in Education MAJ Todd L. Smith  

E-Print Network (OSTI)

Digital Video in Education MAJ Todd L. Smith D/EECS, US Military Academy West Point, NY 10996 dt: Smith, T. L., Ruocco, A., and Jansen, B.J. 1999. Digital video in education, ACM Computer Science

Jansen, James

316

Automated Validation of Trusted Digital Repository Assessment Criteria  

E-Print Network (OSTI)

The RLG/NARA trusted digital repository (TDR) certification checklist defines a set of assessment criteria for preservation environments. The criteria can be mapped into data management policies that define how a digital ...

Smith, MacKenzie

317

Formal specification of requirements for analytical redundancy based fault tolerant flight control systems.  

E-Print Network (OSTI)

??Flight control systems are undergoing a rapid process of automation. The use of Fly-By-Wire digital flight control systems in commercial aviation (Airbus 320 and Boeing… (more)

Del Gobbo, Diego.

2000-01-01T23:59:59.000Z

318

EXPERIMENTAL TEST FACILITY FOR EVALUATION OF CONTROLS AND CONTROL STRATEGIES  

E-Print Network (OSTI)

Pseudo collector vs Return boiler V2 Direct heating Supplysensors Flow switches Boiler enable I DORIC 220 data loggercollector, consists of a boiler with a controlled mixing

Warren, Mashuri L.

2013-01-01T23:59:59.000Z

319

Departmental Directives Program  

Directives, Delegations, and Requirements

To define requirements and responsibilities for implementing the Department of Energy (DOE) Directives Program in support of the Secretary's memorandum of September 10, 2007, Principles Governing Departmental Directives. See also the current list of Directives Requiring Further Documentation, as required by Appendix D of this Order. Cancels DOE P 251.1A, DOE O 251.1B, DOE M 251.1-1B.

2007-09-10T23:59:59.000Z

320

Directives System Manual  

Directives, Delegations, and Requirements

This Manual provides detailed requirements to supplement DOE O 251.1, which establishes requirements for the development, coordination, and sunset review of DOE directives.

1995-10-16T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Departmental Directives Program  

Directives, Delegations, and Requirements

To establish directives as the primary means to set, communicate, and institutionalize policies, requirements, responsibilities, and procedures for Departmental elements and contractors.

2014-10-16T23:59:59.000Z

322

Mathematical modelling for the digital society  

Science Journals Connector (OSTI)

......peer-to-peer interactions, the Internet alone has provided access...the very early days of the Internet (dial up access at home...digital society is wide open to abuse from those who would attack...benefit from the existence of the Internet and the intelligence and connectivity......

Peter Grindrod CBE

2011-06-01T23:59:59.000Z

323

DIGITAL SYNTHESIS TOOLS FOR EDUCATION AND RESEARCH  

E-Print Network (OSTI)

DIGITAL SYNTHESIS TOOLS FOR EDUCATION AND RESEARCH Elena Fomina. Peeter Ellervee, Margus Kruus and teaching purposes. Keywords: High-level synthesis, decomposition, educational computer-aided synthesis to read and is well documented. In this paper, we present computer aided synthesis tools at different

Kruus, Margus

324

Digital Computers in the Biological Laboratory  

Science Journals Connector (OSTI)

...devices promises rapid progress in computer...EXPERIMENTS + MODELING, ANNALS OF THE...devices promises rapid progress in computer...collection of data are automated. The pattern...Digital-computer simulation has been employed...and for analog simulation of models and...devices promises rapid prog-ress in...

Robert L. Schoenfeld; Norman Milkman

1964-10-09T23:59:59.000Z

325

NFC Mobile Payment with Citizen Digital Certificate  

E-Print Network (OSTI)

NFC Mobile Payment with Citizen Digital Certificate Wei-Dar Chen, Keith E. Mayes Smart Card Centre handsets, the mobile phone is likely to become the device of choice for accessing sophisticated services or to emulate smart cards. However the user registration process is relatively weak for access to mobile

Sheldon, Nathan D.

326

Automatic Red Eye Removal for Digital Photography  

E-Print Network (OSTI)

Chapter 1 Automatic Red Eye Removal for Digital Photography FRANCESCA GASPARINI DISCo, Dipartimento The red eye effect is a well known problem in photography. It is often seen in amateur shots taken with a built-in flash, but the problem is also well known to professional photographers. Red eye is the red

Schettini, Raimondo

327

ULATION OFPOWERELECTRONICCIRC USED IN WAVE DIGITAL FI  

E-Print Network (OSTI)

mode power supplies already in use in industry. 1. INTRODUCTION Wave digital filters (WDFs) represent Institute for Power Electronics and Electrical Drives University of Paderbom, FB14 Postfach 1621,33098Paderborn, Germany Tel.: ++49 - 5251 -60 3157, FAX: ++49 -5251-60 3443, E-mail: fiedler

Paderborn, Universität

328

Mathematical modelling for the digital society  

Science Journals Connector (OSTI)

......digital economy players and some real benefits for mathematics. This will force...homes in the UK will shortly have smart metres providing 24/7 data on individual...time; and we need to develop novel smart grid concepts, on the other side of the......

Peter Grindrod CBE

2011-06-01T23:59:59.000Z

329

Digital video camera workshop Sony VX2000  

E-Print Network (OSTI)

Digital video camera workshop Sony VX2000 Sony DSR-PDX10 #12;Borrowing Eligibility · Currently are excellent for all types of video work · Both use MiniDV format (60min SP/90min LP) #12;Camcorder Kits ­ Firewire #12;Video Camera Operation Installing the Battery Sony VX2000 Insert the battery with the arrow

330

High-speed digital holographic interferometry for vibration measurement  

Science Journals Connector (OSTI)

A system based on digital holographic interferometry for the measurement of vibrations is presented. A high-power continuous laser

Pedrini, Giancarlo; Osten, Wolfgang; Gusev, Mikhail E

2006-01-01T23:59:59.000Z

331

Design guidelines for SAR digital receiver/exciter boards.  

SciTech Connect

High resolution radar systems generally require combining fast analog to digital converters and digital to analog converters with very high performance digital signal processing logic. These mixed analog and digital printed circuit boards present special challenges with respect to electromagnetic interference. This document first describes the mechanisms of interference on such boards then follows up with a discussion of prevention techniques and finally provides a checklist for designers to help avoid common mistakes.

Dudley, Peter A.

2009-08-01T23:59:59.000Z

332

Dynamic Controls for Energy Efficiency and Demand Response:Framework Concepts and a New Construction Study Case in New York  

SciTech Connect

Many of today's advanced building control systems are designed to improve granularity of control for energy efficiency. Examples include direct digital controls for building heating, ventilation, and cooling systems (HVAC), and dimmable ballasts for continuous dimming for daylighting applications. This paper discusses recent research on the use of new and existing controls in commercial buildings for integrated energy efficiency and demand response (DR). The paper discusses the use of DR controls strategies in commercial buildings and provides specific details on DR control strategy design concepts for a new building in New York. We present preliminary results from EnergyPlus simulations of the DR strategies at the New York Times Headquarters building currently under construction. The DR strategies at the Times building involve unique state of the art systems with dimmable ballasts, movable shades on the glass facade, and underfloor air HVAC. The simulation efforts at this building are novel, with an innovative building owner considering DR and future DR program participation strategies during the design phase. This paper also discusses commissioning plans for the DR strategies. The trends in integration of various systems through the EMCS, master versus supervisory controls and dynamic operational modes concepts are presented and future research directions are outlined.

Kiliccote, Sila; Piette, Mary Ann; Watson, David S.; Hughes, Glenn

2006-06-20T23:59:59.000Z

333

Digital assistance design for analog systems : digital baseband for outphasing power amplifiers  

E-Print Network (OSTI)

Digital assistance is among many aspects that can be leveraged to help analog/mixed-signal designers keep up with the technology scaling. It usually takes the form of predistorter or compensator in an analog/mixed-signal ...

Li, Yan, Ph. D. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science

2013-01-01T23:59:59.000Z

334

An active oil spill detection digital processing system  

E-Print Network (OSTI)

storage of data being currently used and an arithmetic/logic unit (ALU) to perform the data manipulation. Control circuitry is used to direct the data flow and the operations to be performed. Information for the CPU comes from the memory and input...

Dennard, Robert Marion

2012-06-07T23:59:59.000Z

335

Optical Synchrotron Radiation Beam Imaging with a Digital Mask  

SciTech Connect

We have applied a new imaging/optical masking technique, which employs a digital micro-mirror device (DMD) and optical synchrotron radiation (OSR), to perform high dynamic range (DR) beam imaging at the JLAB Energy Recovery Linac and the SLAC/SPEAR3 Synchrotron Light Source. The OSR from the beam is first focused onto the DMD to produce a primary image; selected areas of this image are spatially filtered by controlling the state of individual micro-mirrors; and finally, the filtered image is refocused onto a CCD camera. At JLAB this technique has been used successfully to view the beam halo with a DR ~ 105. At SPEAR3 the DMD was used to filter out the bright core of the stored beam to study the turn-by-turn dynamics of the 10-3 weaker injected beam. We describe the optical performance, present limitations and our plans to improve the DR of both experimental systems.

Fiorito, R. B. [University of Maryland, College Park, MD (United States); Zhang, H. D. [University of Maryland, College Park, MD (United States); Corbett, W. J. [SLAC, Menlo Park, CA (United States); Fisher, A. S. [SLAC, Menlo Park, CA (United States); Mok, W. Y. [SLAC, Menlo Park, CA (United States); Tian, K. [SLAC, Menlo Park, CA (United States); Douglas, D. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Wilson, F. G. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Zhang, S. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Mitsuhashi, T. M. [KEK, Tsukuba (Japan); Shkvarunets, A. G. [University of Maryland, College Park, MD (United States)

2012-11-01T23:59:59.000Z

336

Characterisation of an oxy-coal flame through digital imaging  

SciTech Connect

This paper presents investigations into the impact of oxy-fuel combustion on flame characteristics through the application of digital imaging and image processing techniques. The characteristic parameters of the flame are derived from flame images that are captured using a vision-based flame monitoring system. Experiments were carried out on a 0.5 MW{sub th} coal combustion test facility. Different flue gas recycle ratios and furnace oxygen levels were created for two different coals. The characteristics of the flame and the correlation between the measured flame parameters and corresponding combustion conditions are described and discussed. The results show that the flame temperature decreases with the recycle ratio for both test coals, suggesting that the flame temperature is effectively controlled by the flue gas recycle ratio. The presence of high levels of CO{sub 2} at high flue gas recycle ratios may result in delayed combustion and thus has a detrimental effect on the flame stability. (author)

Smart, John; Riley, Gerry [RWE npower plc, Windmill Hill Business Park, Whitehill Way, Swindon SN5 6PB (United Kingdom); Lu, Gang; Yan, Yong [Instrumentation, Control and Embedded Systems Research Group, School of Engineering and Digital Arts, University of Kent, Canterbury, Kent CT2 7NT (United Kingdom)

2010-06-15T23:59:59.000Z

337

Attitudes toward gun control laws.  

E-Print Network (OSTI)

??Recently, empirical attention has been directed toward understanding public opinion about gun control laws. Despite this focus, three gaps are evident in extant scholarship. First,… (more)

Borkowski, Elizabeth.

2012-01-01T23:59:59.000Z

338

Classified Matter Protection and Control  

Directives, Delegations, and Requirements

Provides detailed requirements to supplement DOE O 471.2, which establishes policy for the protection and control of classified and unclassified information. Does not cancel other directives.

1995-09-26T23:59:59.000Z

339

DISS. ETH NO. 20845 FUSION OF DIGITAL ELEVATION MODELS  

E-Print Network (OSTI)

DISS. ETH NO. 20845 FUSION OF DIGITAL ELEVATION MODELS A dissertation submitted to ETH ZURICH.109 Fusion of Digital Elevation Models Charis Papasaika-Hanusch Copyright c 2012, Charis Papasaika-3-906467-96-2 i #12;Abstract Digital Elevations Models are one of the most important types of geodata

Giger, Christine

340

On Digital Money and Card Technologies Edwin M. Knorr \\Lambda  

E-Print Network (OSTI)

On Digital Money and Card Technologies Edwin M. Knorr \\Lambda Department of Computer Science fields: digital money and card technologies (especially smart cards), for possible PhD research topics. We believe that digital money and card technologies will revolutionize life in the 21st century

Knorr, Edwin M.

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

PhysiomeSpace: digital library service for biomedical data  

Science Journals Connector (OSTI)

...human project|digital library|data sharing| 1...living human digital library ( http://www.livinghuman...in the users private space. The private space...ontology (Physiome-Space resource ontology) is...stored in the digital library; service resources that...

2010-01-01T23:59:59.000Z

342

Automatic Digital Surface Model (DSM) Generation from Linear Array Images  

E-Print Network (OSTI)

Automatic Digital Surface Model (DSM) Generation from Linear Array Images A dissertation submitted-examiner Presented by Li Zhang Zurich 2005 #12;IGP Mitteilungen Nr. 88 Automatic Digital Surface Model (DSM-906467-55-4 #12;DISS. ETH NO. 16078 Automatic Digital Surface Model (DSM) Generation from Linear Array Images

Giger, Christine

343

Extending Handivote to Handle Digital Economic Paul Cockshott, Karen Renaud  

E-Print Network (OSTI)

a particular economic problem, that of national budgeting, and show how digital technology can be appliedExtending Handivote to Handle Digital Economic Decisions Paul Cockshott, Karen Renaud Department% of the UK economy (WebDezign (2009)). There is clearly a need to start considering how to apply digital

Cockshott, W. Paul

344

A Summary of Taxonomies of Digital System Failure Modes Provided by the DigRel Task Group  

SciTech Connect

Recently, the CSNI directed WGRisk to set up a task group called DIGREL to initiate a new task on developing a taxonomy of failure modes of digital components for the purposes of PSA. It is an important step towards standardized digital I&C reliability assessment techniques for PSA. The objective of this paper is to provide a comparison of the failure mode taxonomies provided by the participants. The failure modes are classified in terms of their levels of detail. Software and hardware failure modes are discussed separately.

Chu T. L.; Yue M.; Postma, W.

2012-06-25T23:59:59.000Z

345

Ripping Graphene: Preferred Directions  

Science Journals Connector (OSTI)

Ripping Graphene: Preferred Directions ... Here we present experimental and theoretical studies on cracks or tears in suspended monolayer graphene membranes. ... Edges from mechanically induced ripping exhibit straight lines and are predominantly aligned in the armchair or zigzag directions of the graphene lattice. ...

Kwanpyo Kim; Vasilii I. Artyukhov; William Regan; Yuanyue Liu; M. F. Crommie; Boris I. Yakobson; A. Zettl

2011-12-12T23:59:59.000Z

346

Departmental Directives System  

Directives, Delegations, and Requirements

The order establishes the directives system to be used for publishing permanent and temporary directives issued by DOE Headquarters and addressed to Headquarters and/or field elements. Chg 1 dated 3-14-85. Cancels DOE 1321.1A.

1983-04-07T23:59:59.000Z

347

2012 CERTS LAAR Program Peer Review - Integration and Extension of Direct Load Management of Smart Loads - Anna Scaglioni, UC Davis  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Integration and Extension of Direct Integration and Extension of Direct Load Management of Smart Loads Anna Scaglione, UC Davis GRA: Mahnoosh Alizadeh Project objective  Invent methods to "store" load demand for * Real-time "generation following" * Integration of load reserves as dispatchable assets in the Energy Market  Architecture for virtual "reserves" (queues) of electrical load demand * Watts to Job mapping (analysis)  Captures digitally the service requirements - Equal service type = Equal queue * Job to Watts mapping (synthesis)  Allows to optimally schedule the load profile Major technical accomplishments  Centralized model: Digital Direct Load Scheduling (DDLS) - Year 1-Year 2

348

direct_deposit_111609  

NLE Websites -- All DOE Office Websites (Extended Search)

PROTECT YOUR BANKING INFORMATION: PROTECT YOUR BANKING INFORMATION: DO NOT complete this form until you are ready to submit it to the Payroll Department. DIRECT DEPOSIT REQUEST Directions: 1. Provide required information neatly, legibly; 2. If Checking Account Direct Deposit, include a voided check. a. DO NOT submit a deposit slip! 3. If Savings Account Direct Deposit, include a copy of savings card. 4. Sign this form; 5. Inter-office mail it to Craft Payroll at "P238." DIRECT DEPOSITION AUTHORIZATION I hereby authorize Los Alamos National Laboratory, hereinafter called The Laboratory, to initiate credit entries and, if necessary, debit entries and adjustments for any credit entries in error to my account listed on this form. If deposit is for:

349

Directions and Maps  

NLE Websites -- All DOE Office Websites (Extended Search)

Directions & Maps 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 Directions and Maps Aerial View of Los Alamos Aerial approach to the Los Alamos airport Where we're located Los Alamos (elevation 7,355 feet) is perched high atop the Pajarito Plateau in the Jemez Mountains, 35 miles northwest of Santa Fe. The Bradbury Science Museum is located in downtown Los Alamos at the corner of Central Avenue and 15th Street. If you're driving here and using GPS navigation, our address is 1350 Central Avenue, Los Alamos, NM 87544. How to get here From Albuquerque take I-25 north to Santa Fe (take NM 599 for most direct route), then US 84/285 north to Pojoaque. At Pojoaque take the NM 502 exit

350

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

E-Print Network (OSTI)

: · Experience with digital technologies and software (digital assets management, intranet, etc.) · Candidate

Qiu, Weigang

351

Digital Music Research UK Roadmap www.dmrn.org/roadmap Developed by the Digital Music Research Network 1  

E-Print Network (OSTI)

Network 1 Research Goals in Digital Music: A Ten Year View Machine Listening Machine listening in digital the development of artificial devices and algorithms capable of analysing audio signals in such a way- based research, expert systems and psychology/cognitive science. Machine listening in digital music can

Miranda, Eduardo Reck

352

Digital Nominalism. Notes on the Ethics of Information Society in View of the Ontology of the Digital  

Science Journals Connector (OSTI)

The commodification of code demands two preconditions: a belief if the existence of code and a system of ownership for the code. An examination of these preconditions is helpful for resisting the further widening of digital divides. The ontological belief ... Keywords: ICT, digital divide, digitalness, disorganisations, free software, information society, intellectual property, knowledge creation, ontology

Tere Vadén

2004-12-01T23:59:59.000Z

353

Capacitor charging FET switcher with controller to adjust pulse width  

DOE Patents (OSTI)

A switching power supply includes an FET full bridge, a controller to drive the FETs, a programmable controller to dynamically control final output current by adjusting pulse width, and a variety of protective systems, including an overcurrent latch for current control. Power MOSFETS are switched at a variable frequency from 20-50 kHz to charge a capacitor load from 0 to 6 kV. A ferrite transformer steps up the DC input. The transformer primary is a full bridge configuration with the FET switches and the secondary is fed into a high voltage full wave rectifier whose output is connected directly to the energy storage capacitor. The peak current is held constant by varying the pulse width using predetermined timing resistors and counting pulses. The pulse width is increased as the capacitor charges to maintain peak current. A digital ripple counter counts pulses, and after the desired number is reached, an up-counter is clocked. The up-counter output is decoded to choose among different resistors used to discharge a timing capacitor, thereby determining the pulse width. A current latch shuts down the supply on overcurrent due to either excessive pulse width causing transformer saturation or a major bridge fault, i.e., FET or transformer failure, or failure of the drive circuitry.

Mihalka, Alex M. (Livermore, CA)

1986-01-01T23:59:59.000Z

354

Directional excitation of graphene surface plasmons  

E-Print Network (OSTI)

We propose a scheme to directionally couple light into graphene plasmons by placing a graphene sheet on a magneto-optical substrate. When a magnetic field is applied parallel to the surface, the graphene plasmon dispersion relation becomes asymmetric in the forward and backward directions. It is possible to achieve unidirectional excitation of graphene plasmons with normally incident illumination by applying a grating to the substrate. The directionality can be actively controlled by electrically gating the graphene, or by varying the magnetic bias. This scheme may have applications in graphene-based opto-electronics and sensing.

Liu, Fangli; Chong, Y D

2014-01-01T23:59:59.000Z

355

HVDC system control for damping subsynchronous oscillations  

SciTech Connect

A method for designing a supplemental subsynchronous damping control (SSDC) for an HVDC transmission system is described. The SSDC eliminates torsional instabilities caused by interaction between conventional HVDC controls and turbine-generator rotor torsional modes of vibration. Results of digital simulation used in the design process are compared with measurements made on an HVDC simulator. Results of both digital simulations and HVDC simulator tests which demonstrate SSDC performance are shown. This research and development effort was sponsored by EPRI under RP1425-1.

Piwko, R.J.; Larsen, E.V.

1982-07-01T23:59:59.000Z

356

Technical basis for acceptance criteria on the susceptibility of digital systems to electromagnetic interference  

SciTech Connect

This paper discusses the development of the technical basis for establishing acceptance criteria on the susceptibility of digital systems to electromagnetic interference (EMI). The effort is sponsored by the US Nuclear Regulatory Commission and stems from the safety-related issues that need to be addressed with the application of digital instrumentation and controls systems in nuclear power plants. Designers of digital circuits are incorporating increasingly higher clock frequencies and lower logic voltage levels, thereby leading to the risk of susceptibility when spurious interference is misinterpreted as legitimate logic. Development of the technical basis for acceptance criteria centers around establishing good engineering practices to ensure that sufficient levels of electromagnetic compatibility (EMC) are maintained between the nuclear power plant`s electronic and electromechanical systems. First, good EMC design and installation practices are needed to control the emissions from interference sources and their impact on other nearby circuits and systems. Then, a test and evaluation program is needed to outline the EMI tests to be performed, the associated test methods to be followed, and adequate test limits to ensure that the circuit or system under test meets the recommended guidelines. Test and evaluation should be followed by periodic maintenance to assess whether the recommended EMI control practices continue to be adhered to as part of the routine operation of the nuclear power plant. By following these steps, the probability of encountering safety-related problems associated with EMI will be greatly reduced.

Ewing, P.D.; Korsah, K. [Oak Ridge National Lab., TN (US); Antonescu, C. [Nuclear Regulatory Commission, Rockville, MD (US). Office of Nuclear Regulatory Research

1992-12-31T23:59:59.000Z

357

Exploring former interaction qualities for tomorrow's control room design  

E-Print Network (OSTI)

.g. in power plants or industrial production plants. One essential task in operating control rooms consists by virtual control elements that are operated through desktop computers. However this kind of interaction between power and reality as stated by Jacob et al. (2008): While digitization gave control rooms more

Reiterer, Harald

358

The Alsos Digital Library for Nuclear Issues  

Science Journals Connector (OSTI)

The issues associated with nuclear energy and security encompass a broad range of topics from diverse disciplines. This diversity often makes it difficult to locate reliable sources of information on these important topics. The Alsos Digital Library for Nuclear Issues provides a searchable collection of vetted annotations of references on a wide range of nuclear topics. Recently, the Alsos library joined Nuclear Pathways, a composite website encompassing nuclear issues, which currently integrates four high quality websites, each with its own specialty and mission. All are members of the National Science Digital Library, a comprehensive scientific resource in the USA. The Nuclear Pathways websites bring together many aspects of crucial issues of our time for the people who need the information the most â?? policy makers, scientists, educators, students and ordinary citizens.

F.A. Settle; E.R. Blackmer; T.P. Whaley

2008-01-01T23:59:59.000Z

359

Tourism destinations as digital business ecosystems  

E-Print Network (OSTI)

Tourism has been experiencing very relevant changes since when Information and Communication Technologies (ICTs), in all their forms, have started to pervade the industry and the market. In the last decade, a new concept gained the attention of both researchers and practitioners, that of Digital Business Ecosystem (DBE). It can be considered as a technological infrastructure aimed at creating a digital environment to support and enhance networking between enterprises and stakeholders operating within a sector. Aim of this paper is to assess the extent to which the technological connection has affected the structural configuration of the tourism system and, specifically, of tourism destinations. The present study argues that two components can be considered when assessing the relationships among stakeholders within a tourism destination: a real and a virtual one. Further it shows how these two components are structurally strongly coupled and co-evolve forming a single system.

Baggio, Rodolfo

2012-01-01T23:59:59.000Z

360

Digital Ecosystems: Evolving Service-Orientated Architectures  

E-Print Network (OSTI)

A novel optimisation technique inspired by natural ecosystems is presented, where the optimisation works at two levels: a first optimisation, migration of services which are distributed in a decentralised peer-to-peer network, operating continuously in time; this process feeds a second optimisation based on evolutionary computing that operates locally on single peers and is aimed at finding solutions to satisfy locally relevant constraints. Through this twofold process, the local search is accelerated and will yield better local optima, because the distributed optimisation already provides a good sampling of the search space by making use of computations already performed in other peers with similar constraints. We call this new distributed optimisation architecture a Digital Ecosystem, an Ecosystem Orientated Architecture (EOA) created by extending a Service-Oriented Architecture (SOA) with Distributed Evolutionary Computing (DEC). The Digital Ecosystem will allow services to recombine and evolve over time, ...

Briscoe, G

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

4 - Digital microfluidics technologies for biomedical devices  

Science Journals Connector (OSTI)

Abstract: Droplet-based digital microfluidics is a topic with growing relevance to biological, chemical, and health-science fields. The high precision and excellent reagent economy of such systems are unparalleled. There are, however, fundamental challenges related to actuation and sensing in terms of system scalability, and these challenges are addressed within this chapter. In particular, a new digital microfluidics multiplexer is shown to overcome contemporary on-chip microdrop motion addressability issues and eliminate droplet interference challenges. At the same time, an integrated folded-cavity optical sensor provides highly localized and sensitive probing of internal fluid refractive indices. The complete system offers improved microdrop motion and sensing capabilities for future lab-on-a-chip technologies.

C.M. Collier; J. Nichols; J.F. Holzman

2013-01-01T23:59:59.000Z

362

Direct Discharge Permit (Vermont)  

Energy.gov (U.S. Department of Energy (DOE))

A direct discharge permit is required if a project involves the discharge of pollutants to state waters. For generation purposes, this involves the withdrawal of surface water for cooling purposes...

363

Directed transport in equilibrium  

E-Print Network (OSTI)

We investigate how a microscopic system, which can move only in one direction, comes to equilibrium with a heat-bath. To understand this problem, we investigate a symmetry broken dimer constrained to move in a particular direction when in contact with a uniform heat-bath at a constant temperature. The dimer is not driven by any external force. The system gains kinetic energy from the heat-bath and that the system can only use in directed transport. At the hard core collision limit between the particles of the dimer, we show by exact analytic calculations and complementary numerical results that the dimer undergoes steady directed transport by attaining a stationary distribution for a relevant degree of freedom. Our observation, being perfectly consistent with the {\\it second law of thermodynamics}, leads to a generalization of the existing {\\it Brownian ratchet} paradigm and points out some important limitations of {\\it Fokker-Planck} dynamics.

Bhattacharyay, A

2010-01-01T23:59:59.000Z

364

Surface Wind Direction Variability  

Science Journals Connector (OSTI)

Common large shifts of wind direction in the weak-wind nocturnal boundary layer are poorly understood and are not adequately captured by numerical models and statistical parameterizations. The current study examines 15 datasets representing a ...

Larry Mahrt

2011-01-01T23:59:59.000Z

365

Art Directable Tornadoes  

E-Print Network (OSTI)

......................................................................... 25 2. Directional Force ........................................................... 26 3. Vortex Force .................................................................. 26 4. Lattice... ................................................................... 7 7 Tornado in its rope stage before disappearing ........................................... 9 8 Fire vortex and Waterspout ........................................................................ 10 9 Landspout and Gustnado...

Dwivedi, Ravindra

2011-08-08T23:59:59.000Z

366

Refrigerant directly cooled capacitors  

DOE Patents (OSTI)

The invention is a direct contact refrigerant cooling system using a refrigerant floating loop having a refrigerant and refrigeration devices. The cooling system has at least one hermetic container disposed in the refrigerant floating loop. The hermetic container has at least one electronic component selected from the group consisting of capacitors, power electronic switches and gating signal module. The refrigerant is in direct contact with the electronic component.

Hsu, John S. (Oak Ridge, TN); Seiber, Larry E. (Oak Ridge, TN); Marlino, Laura D. (Oak Ridge, TN); Ayers, Curtis W. (Kingston, TN)

2007-09-11T23:59:59.000Z

367

Digital computer operation of a nuclear reactor  

DOE Patents (OSTI)

A method is described for the safe operation of a complex system such as a nuclear reactor using a digital computer. The computer is supplied with a data base containing a list of the safe state of the reactor and a list of operating instructions for achieving a safe state when the actual state of the reactor does not correspond to a listed safe state, the computer selects operating instructions to return the reactor to a safe state.

Colley, Robert W. (Richland, WA)

1984-01-01T23:59:59.000Z

368

Digital computer operation of a nuclear reactor  

DOE Patents (OSTI)

A method is described for the safe operation of a complex system such as a nuclear reactor using a digital computer. The computer is supplied with a data base containing a list of the safe state of the reactor and a list of operating instructions for achieving a safe state when the actual state of the reactor does not correspond to a listed safe state, the computer selects operating instructions to return the reactor to a safe state.

Colley, R.W.

1982-06-29T23:59:59.000Z

369

New Directions in Direct Dark Matter Searches  

E-Print Network (OSTI)

I present the status of direct dark matter detection with specific attention to the experimental results and their phenomenological interpretation in terms of dark matter interactions. In particular I review a new and more general approach to study signals in this field based on non-relativistic operators which parametrize more efficiently the dark matter-nucleus interactions in terms of a very limited number of relevant degrees of freedom. Then I list the major experimental results, pointing out the main uncertainties that affect the theoretical interpretation of the data. Finally, since the underlying theory that describes both the dark matter and the standard model fields is unknown, I address the uncertainties coming from the nature of the interaction. In particular, the phenomenology of a class of models in which the interaction between dark matter particles and target nuclei is of a long-range type is discussed.

Paolo Panci

2014-02-06T23:59:59.000Z

370

Advances and new directions in direct liquefaction  

SciTech Connect

With advance in single stage processes such as H-Coal, EDS and SRC, and refining and upgrading of coal liquids by Chevron and UOP, the direct liquefaction process has continuously evolved to the present two-stage catalytic configuration, which produces the highest liquid yield and product quality of any process worldwide. The Two Stage Liquefaction (TSL) process has been successfully applied to bituminous and subbituminous coals, overcoming problems associated with earlier processes. But, potential for additional improvement is recognized in several areas: cleaning coal prior to liquefaction; low temperature and pressure preconditioning of feed coal; novel catalysts development to arrest regressive reactions and improve hydrotreatment and cracking reactions; improvement in hydrocarbon value recovery and reduced energy rejection by alternate bottoms processing techniques. In this paper, after discussing briefly the history of liquefaction and development of the TSL process, present potential areas for research and development are presented.

Rao, S.N.; Schindler, H.D.; McGurl, G.V.

1988-01-01T23:59:59.000Z

371

DIGITAL TECHNOLOGY BUSINESS CASE METHODOLOGY GUIDE & WORKBOOK  

SciTech Connect

Performance advantages of the new digital technologies are widely acknowledged, but it has proven difficult for utilities to derive business cases for justifying investment in these new capabilities. Lack of a business case is often cited by utilities as a barrier to pursuing wide-scale application of digital technologies to nuclear plant work activities. The decision to move forward with funding usually hinges on demonstrating actual cost reductions that can be credited to budgets and thereby truly reduce O&M or capital costs. Technology enhancements, while enhancing work methods and making work more efficient, often fail to eliminate workload such that it changes overall staffing and material cost requirements. It is critical to demonstrate cost reductions or impacts on non-cost performance objectives in order for the business case to justify investment by nuclear operators. This Business Case Methodology approaches building a business case for a particular technology or suite of technologies by detailing how they impact an operator in one or more of the three following areas: Labor Costs, Non-Labor Costs, and Key Performance Indicators (KPIs). Key to those impacts will be identifying where the savings are “harvestable,” meaning they result in an actual reduction in headcount and/or cost. The report consists of a Digital Technology Business Case Methodology Guide and an accompanying spreadsheet workbook that will enable the user to develop a business case.

Ken Thomas; Sean Lawrie; Adam Hart; Chris Vlahoplus

2014-09-01T23:59:59.000Z

372

Portable Digital Radiography and Computed Tomography Manual  

SciTech Connect

This user manual describes the function and use of the portable digital radiography and computed tomography (DRCT) scanner. The manual gives a general overview of x-ray imaging systems along with a description of the DRCT system. An inventory of the all the system components, organized by shipping container, is also included. In addition, detailed, step-by-step procedures are provided for all of the exercises necessary for a novice user to successfully collect digital radiographs and tomographic images of an object, including instructions on system assembly and detector calibration and system alignment. There is also a short section covering the limited system care and maintenance needs. Descriptions of the included software packages, the DRCT Digital Imager used for system operation, and the DRCT Image Processing Interface used for image viewing and tomographic data reconstruction are given in the appendixes. The appendixes also include a cheat sheet for more experienced users, a listing of known system problems and how to mitigate them, and an inventory check-off sheet suitable for copying and including with the machine for shipment purposes.

Not Available

2007-11-01T23:59:59.000Z

373

International Journal of Systems Science, 2000, volume 31, number 4, pages 519 527 Multi machine power system excitation control design via theories  

E-Print Network (OSTI)

voltage direct current (HVDC) power control design and static voltage condensor (SVC) control design (Lu

Qu, Zhihua

374

Diamond turning machine controller implementation  

SciTech Connect

The standard controller for a Pnuemo ASG 2500 Diamond Turning Machine, an Allen Bradley 8200, has been replaced with a custom high-performance design. This controller consists of four major components. Axis position feedback information is provided by a Zygo Axiom 2/20 laser interferometer with 0.1 micro-inch resolution. Hardware interface logic couples the computers digital and analog I/O channels to the diamond turning machine`s analog motor controllers, the laser interferometer, and other machine status and control information. It also provides front panel switches for operator override of the computer controller and implement the emergency stop sequence. The remaining two components, the control computer hardware and software, are discussed in detail below.

Garrard, K.P.; Taylor, L.W.; Knight, B.F.; Fornaro, R.J.

1988-12-01T23:59:59.000Z

375

Application and field experience of a digital substation switch  

SciTech Connect

There has been an increase in the use of solid-state, microprocessor-based relays, fault recorders, meters, and programmable controllers; in transmission and distribution substations. These devices can be remotely interrogated or programmed, and can send reports back to a host computer through their RS-232 communications ports. These devices use a wide variety of communications software and protocols. Because these devices can be located in the substation yard, induced surges and voltages can be present on the communication lines. This can impair the ability to communicate over RS-232 lines, and even cause equipment damage. In addition. the distance from the control house to the substation yard can limit the use of standard RS-232 protocol. For greater system economy, several devices must use the same communications channel. This requires a means of reliably connecting several devices to the incoming and outgoing communications circuits. This paper describes a digital substation switch (DSS) that was designed for this application, and its initial installation and field experience at Savannah Electric. The DSS connects various meters, transmission relays, and distribution relays to PCs in remote locations through a voice-grade telephone circuit. In this application, the DSS uses a fiber loop to communicate with the devices in the substation yard.

Spain, R.; Fodero, K.

1994-12-31T23:59:59.000Z

376

Digitizing Legacy STI | Scientific and Technical Information Program  

Office of Scientific and Technical Information (OSTI)

Digitizing Legacy STI Digitizing Legacy STI Print page Print page Email page Email page As electronic access to information becomes the norm, many sites are engaged in digitizing their legacy documents (those produced in print prior to 2001). Making these files available through the OSTI databases will help realize the full potential of the Department's scientific and technical information. OSTI will work together with sites across the DOE Complex to provide access to digitized full-text documents in announcement notices in the Energy Link (E-Link) system that do not contain digitized full-text documents. Finding Digitized STI at OSTI DOE and major DOE contractor sites with E-Link access can utilize the Full-text Change report accessible through the Reports section of E-Link. Sites can search by date range for all full-text items that have

377

Renewable Energy & Energy Efficiency Partnership (REEEP) Digital Library |  

Open Energy Info (EERE)

Renewable Energy & Energy Efficiency Partnership (REEEP) Digital Library Renewable Energy & Energy Efficiency Partnership (REEEP) Digital Library Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Renewable Energy and Energy Efficiency Partnership (REEEP) Digital Library Agency/Company /Organization: Renewable Energy and Energy Efficiency Partnership Sector: Energy Focus Area: Energy Efficiency Resource Type: Training materials Website: toolkits.reeep.org/ References: Renewable Energy & Energy Efficiency Partnership (REEEP) Digital Library[1] Logo: Renewable Energy and Energy Efficiency Partnership (REEEP) Digital Library The REEEP digital library offers an array of information in the field of Renewable Energy and Energy Efficiency. These range from policy papers and case studies to presentations that are produced by REEEP funded projects

378

Directional gamma detector  

DOE Patents (OSTI)

An improved directional gamma radiation detector has a collector sandwiched etween two layers of insulation of varying thicknesses. The collector and insulation layers are contained within an evacuated casing, or emitter, which releases electrons upon exposure to gamma radiation. Delayed electrons and electrons entering the collector at oblique angles are attenuated as they pass through the insulation layers on route to the collector.

LeVert, Francis E. (Downers Grove, Knoxville, TN); Cox, Samson A. (Downers Grove, IL)

1981-01-01T23:59:59.000Z

379

Extension of DOE Directives  

Directives, Delegations, and Requirements

This Notice extends the following directives until 2/16/04: DOE N 205.2, Foreign National Access to DOE Cyber Systems, and DOE N 205.3, Password Generation, Protection, and Use, dated 11/23/99-7/1/00.

2003-02-24T23:59:59.000Z

380

Optimal digital compensation networks for acoustic transducers  

Science Journals Connector (OSTI)

A digital compensation network is designed which (1) minimizes deviation from the user?determined optimal transducer response (2) limits the sensitivity to physical perturbations of that response and (3) ensures actuator authority limitations for known and unknown?but?bounded input sequences.H ? H 2 l ? and l 1 transfer function norms translate the design goals and specifications into a convex constrained optimization problem which is solved using semidefinite programming. The methodology can be simply extended to treat transducer arrays and optimal beamforming. A mathematically modeled underwater acoustictransducer provides a numerical example for exploring the optimal trade?off between competing specifications. [This work is partialy supported by SRI International.

Paul J. Titterton Jr.

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Examining Group Work: Implications for the Digital Library as Sharium  

Science Journals Connector (OSTI)

Digital libraries have the potential to be rich interactive ... the need for a complex system that intertwines public and private work space. Currently DLs provide only one tool –...

Sandra Toze; Elaine G. Toms

2010-01-01T23:59:59.000Z

382

Time O®set Optimization in Digital Broadcasting - Optimization Online  

E-Print Network (OSTI)

French and German premiers as one of the main challenges of European ...... R., Frequency Assignment and Network Planning for Digital Terrestrial Broad-.

383

U-034: Fraudulent Digital Certificates Could Allow Spoofing ...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

T-706: Microsoft Fraudulent Digital Certificate Issued by DigiNotar U-033: Microsoft Security Bulletin Summary for November 2011 V-133: Microsoft pulls Patch Tuesday security fix...

384

Recent results of an experimental study on the impact of smoke on digital I and C equipment  

SciTech Connect

A program to assess the impact of smoke on digital Instrumentation and Control (I and C) safety systems began in 1994, funded by the US Nuclear Regulatory Commission Office of Research. Digital I and C safety systems are likely replacements for today`s analog systems. The nuclear industry has little experience in qualifying digital electronics for critical systems, part of which is understanding system performance during plant fires. The results of tests evaluating the performance of digital circuits and chip technologies exposed to the various smoke and humidity conditions representative of cable fires are discussed. Tests results show that low to moderate smoke densities can cause intermittent failures of digital systems. Smoke increases leakage currents between biased contacts, leading to shorts. Chips with faster switching times, and thus higher output drive currents, are less sensitive to leakage currents and thus to smoke. Contact corrosion from acidic gases in smoke and inductance of stray capacitance are less important contributors to system upset. Transmission line coupling was increased because the smoke acted as a conductive layer between the lines. Permanent circuit damage was not obvious in the 24 hrs of circuit monitoring. Test results also show that polyurethane, parylene, and acrylic conformal coatings are more effective in protecting against smoke than epoxy or silicone. Common-sense mitigation measures are discussed. Unfortunately industry is a long way from standard tests for smoke exposure that capture the variations in smoke exposure possible in an actual fire.

Tanaka, T.J. [Sandia National Labs., Albuquerque, NM (United States). Accident and Consequence Analysis Dept.; Antonescu, C. [Nuclear Regulatory Commission, Washington, DC (United States). Office of Nuclear Regulatory Research

1997-10-01T23:59:59.000Z

385

Method of controlling fusion reaction rates  

DOE Patents (OSTI)

A method of controlling the reaction rates of the fuel atoms in a fusion reactor comprises the step of polarizing the nuclei of the fuel atoms in a particular direction relative to the plasma confining magnetic field. Fusion reaction rates can be increased or decreased, and the direction of emission of the reaction products can be controlled, depending on the choice of polarization direction.

Kulsrud, Russell M. (Princeton, NJ); Furth, Harold P. (Princeton, NJ); Valeo, Ernest J. (Princeton Junction, NJ); Goldhaber, Maurice (Bayport, NY)

1988-01-01T23:59:59.000Z

386

Letter: Direction and Guidance for Implementing Direct DOE Relationship &  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Letter: Direction and Guidance for Implementing Direct DOE Letter: Direction and Guidance for Implementing Direct DOE Relationship & Funding for EMSSABs Letter: Direction and Guidance for Implementing Direct DOE Relationship & Funding for EMSSABs From: Assistant Secretary, Jessie Hill Roberson (EM-11) To: Mr. Monte Wilson, Chair, INEEL Citizens Advisory Board This letter is in response to a November 21, 2003 letter regarding direction and guidance for implementing direct DOE relationship and funding for Environmental Management Site Specific Advisory Boards. Roberson Letter - December 12, 2003 More Documents & Publications Letter: Progress in Implementing a Direct DOE Relationship & Funding for the EMSSABs Letter: Mission, Objectives & Scope of the Site Specific Advisory Board Memorandum: Direction and Guidance for Implementing Direct DOE Relationship

387

Letter: Direction and Guidance for Implementing Direct DOE Relationship &  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Letter: Direction and Guidance for Implementing Direct DOE Letter: Direction and Guidance for Implementing Direct DOE Relationship & Funding for EMSSABs Letter: Direction and Guidance for Implementing Direct DOE Relationship & Funding for EMSSABs From: Assistant Secretary, Jessie Hill Roberson (EM-11) To: Mr. Monte Wilson, Chair, INEEL Citizens Advisory Board This letter is in response to a November 21, 2003 letter regarding direction and guidance for implementing direct DOE relationship and funding for Environmental Management Site Specific Advisory Boards. Roberson Letter - December 12, 2003 More Documents & Publications Letter: Progress in Implementing a Direct DOE Relationship & Funding for the EMSSABs Letter: Mission, Objectives & Scope of the Site Specific Advisory Board Memorandum: Direction and Guidance for Implementing Direct DOE Relationship

388

Analog and digital dynamic simulations of a rigid body aircraft in straight and level flight  

E-Print Network (OSTI)

. , Texas A&M University Directed by: Dr. Balusu M. Rao A study of the dynamic response characteristics of an aircraft at low approach speeds was conducted using both a digital and an analog computer to simulate a DeHavilland "Beaver" DHC-2 in flight... to produce more sideslip and yawing motions than the rudder with analytical solutions. The problem areas of the STOL aircraft at low approach speeds as a result of a study of the DeHavilland "Beaver" were in lateral stability. The aircraft's response...

Stroman, Morris Michael

2012-06-07T23:59:59.000Z

389

Digital autoland system for unmanned aerial vehicles  

E-Print Network (OSTI)

Sensor Comparison . . . . . . . . . . . . . . . . . . . 59 VIII Localizer GPS Sensor Comparison . . . . . . . . . . . . . . . . . . . 59 IX Glideslope Controller Turbulence Comparison . . . . . . . . . . . . . 65 X Glideslope Controller Model Uncertainty... Comparison . . . . . . . . . 66 XI Glideslope ILS Sensor Comparison . . . . . . . . . . . . . . . . . . . 68 XII Glideslope MLS Sensor Comparison . . . . . . . . . . . . . . . . . . . 69 XIII Glideslope GPS Sensor Comparison...

Wagner, Thomas William, Jr.

2007-09-17T23:59:59.000Z

390

Robust adaptive control of HVDC systems  

SciTech Connect

The transient performance of an HVDC power system is highly dependent on the parameters of the current/voltage regulators of the converter controls. In order to better accommodate changes in system structure or dc operating conditions, this paper introduces a new adaptive control strategy. The advantages of automatic tuning for continuous fine tuning are combined with predetermined gain scheduling in order to achieve robustness for large disturbances. Examples are provided for a digitally simulated back-to-back dc system.

Reeve, J.; Sultan, M. (Univ. of Waterloo, Ontario (Canada))

1994-07-01T23:59:59.000Z

391

The Cost of Power Disturbances to Industrial & Digital Economy Companies  

E-Print Network (OSTI)

The Cost of Power Disturbances to Industrial & Digital Economy Companies Submitted to: EPRI To Client #12;The Cost of Power Disturbances to Industrial & Digital Economy Companies Confidential of Power Disturbances 1-1 The Cost of Power Disturbances to U.S. Businesses 1-2 Study Objectives 1

Schrijver, Karel

392

Physics Pathway: A Digital Library Filled with Synthetic Interviews*  

E-Print Network (OSTI)

Physics Pathway: A Digital Library Filled with Synthetic Interviews* Michael G. Christel-412-268-7796 sms@cs.cmu.edu Dean Zollman Department of Physics Kansas State University Manhattan, KS 66506 1-785-532-1619 dzollman@phys.ksu.edu ABSTRACT Physics Pathway is a digital library available through an Adobe Flash portal

Christel, Mike

393

INSTRUCTION MANUAL digital pH/mV meter  

E-Print Network (OSTI)

INSTRUCTION MANUAL model 701A digital pH/mV meter /r^ ORION RESEARCH #12;contents Introduction 1 701A digital pH/mV meter is the ideal meter for all research and precision measurements with pH and chemical sensing electrodes. In both the absolute and relative mV modes, the meter covers a range of ± 1999

Kleinfeld, David

394

The 4C framework: principles of interaction in digital ecosystems  

Science Journals Connector (OSTI)

Recent years have seen an increased research interest in multi-device interactions and digital ecosystems. This research addresses new opportunities and challenges when users are not simply interacting with one system or device at a time, but orchestrate ... Keywords: digital ecosystems, framework, multi-artifact, multi-user, relationships, structures

Henrik Sřrensen, Dimitrios Raptis, Jesper Kjeldskov, Mikael B. Skov

2014-09-01T23:59:59.000Z

395

Introductory Digital Design & Computer Architecture David Money Harris  

E-Print Network (OSTI)

Introductory Digital Design & Computer Architecture Curriculum David Money Harris Department of Engineering Harvey Mudd College Claremont, CA David_Harris@hmc.edu Sarah Harris Department of Engineering Harvey Mudd College Claremont, CA Sarah_Harris@hmc.edu Keywords--digital design, computer architecture

Harris, David Money

396

Interaction and audience analysis in interactive digital TV systems  

Science Journals Connector (OSTI)

This paper proposes and compares two approaches for data capture to support the analysis of user interaction and audience measurement in Interactive digital TV (IDTV) systems. The first approach relies on the development of extensions to existent standards ... Keywords: TV digital, audi?ncia, ginga, intera??o, medi??o

Samuel da Costa Alves Basilio; Marcelo Ferreira Moreno; Eduardo Barrére

2012-10-01T23:59:59.000Z

397

DIZI: A Digital Ink Zooming Interface for Document Annotation  

E-Print Network (OSTI)

DIZI: A Digital Ink Zooming Interface for Document Annotation Maneesh Agrawala, Michael Shilman://research.microsoft.com Abstract. Pen computing devices provide a natural interface for annotating documents with freeform digital on paper. We present DIZI, a focus+context interface that zooms up a region of the underlying document

Agrawala, Maneesh

398

Network Electricity Use Associated with Wireless Personal Digital Assistants  

E-Print Network (OSTI)

Network Electricity Use Associated with Wireless Personal Digital Assistants Jonathan Koomey1 the widely cited claim that the network electricity use associated with a wireless personal digital assistant PDA is equal to the electricity consumed by a refrigerator. It compiles estimates of the data flows

Kammen, Daniel M.

399

Concurrent Testing of Digital Microfluidics-Based Biochips  

E-Print Network (OSTI)

Concurrent Testing of Digital Microfluidics-Based Biochips FEI SU, SULE OZEV, and KRISHNENDU in digital microfluidics-based biochips and investigate the related problems of test planning and resource this optimization problem. We apply the proposed concurrent testing method- ology to a droplet-based microfluidic

Chakrabarty, Krishnendu

400

COPLANAR DIGITAL MICROFLUIDICS USING STANDARD PRINTED CIRCUIT BOARD PROCESSES  

E-Print Network (OSTI)

COPLANAR DIGITAL MICROFLUIDICS USING STANDARD PRINTED CIRCUIT BOARD PROCESSES P.Y. Paik1 , V circuit board (PCB) and 3. Transport and mixing in an "open" microfluidic substrate. Similar to "soft-flow microfluidics, this work allows researchers to easily experiment with discrete-flow microfluidics (digital

Chakrabarty, Krishnendu

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

ANALOG-DIGITAL INPUT OUTPUT SYSTEM FOR APPLE CO  

E-Print Network (OSTI)

ADIOS ANALOG-DIGITAL INPUT OUTPUT SYSTEM FOR APPLE CO NATIONAL RADIO ASTRONOMY OBSERVATORY TABLES ADIOS - ANALOG-DIGITAL INPUT OUTPUT SYSTEM FOR APPLE COMPUTER TABLE FOR CONTENTS Page I Module and Apple Card (Photograph) Figure 3 Complete Apple/ADIOS System (Photograph) Figure 4 Analog

Groppi, Christopher

402

NAF Netherlands Architecture Forum for the Digital World Competences  

E-Print Network (OSTI)

NAF ­ Netherlands Architecture Forum for the Digital World Competences of IT Architects Roel of the special interest group "Professionalisation" of the Netherlands Architecture Forum for the Digital World of Twente, The Netherlands. Claudia Steghuis M.Sc. is Senior Consultant enterprise architecture at Capgemini

Wieringa, Roel

403

Digital Sun Sensor Using Multiple Pinholes Charlie Hersom  

E-Print Network (OSTI)

Digital Sun Sensor Using Multiple Pinholes Charlie Hersom President Spectral Applied Research (905 with CRESTech and the University of Waterloo, has developed a low-cost digital sun sensor for satellite attitude each field-of-view. The Sun is a nearly collimated source and produces a spot on the array via

Hornsey, Richard

404

Direct kinetic correlation of carriers and ferromagnetism in...  

NLE Websites -- All DOE Office Websites (Extended Search)

kinetic correlation of carriers and ferromagnetism in Co2+ : ZnO. Direct kinetic correlation of carriers and ferromagnetism in Co2+ : ZnO. Abstract: We report the use of controlled...

405

A system for constructing private digital libraries through information space exploration  

Science Journals Connector (OSTI)

Digital libraries on the Internet are constructed separately and ... On the other hand, users of digital libraries have their own information needs. In order for users to fully utilize digital libraries, therefor...

Masanori Sugimoto; Norio Katayama…

1998-10-01T23:59:59.000Z

406

Modeling Combustion Control for High Power Diesel Mode Switching...  

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

Combustion Control for High Power Diesel Mode Switching Modeling Combustion Control for High Power Diesel Mode Switching Poster presentation given at the 16th Directions in...

407

Breakout Session -- TEC Direction  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

III: TEC III: TEC Direction and Priorities Presented to: Transportation External Coordination Working Group Presented by: Alex Thrower Office of Logistics Management February 7, 2008 San Antonio, Texas 2 Topics of Discussion * Transportation External Coordination Working Group (TEC) charter and membership * Topic group functions * Meeting format 3 TEC Charter and Membership * Mission - TEC was formed in 1992 to improve coordination among the Department of Energy (DOE) and external groups interested in the Department's transportation activities The Office of Civilian Radioactive Waste Management (OCRWM) co-chairs TEC with DOE's Environmental Management Program Provides an opportunity for broad based input and information exchange from varied organizations - Members meet semi-annually to participate in

408

Modular multivariable control improves hydrocracking  

SciTech Connect

Modular multivariable control (MMC), a system of interconnected, single process variable controllers, can be a user-friendly, reliable and cost-effective alternative to centralized, large-scale multivariable control packages. MMC properties and features derive directly from the properties of the coordinated controller which, in turn, is based on internal model control technology. MMC was applied to a hydrocracking unit involving two process variables and three controller outputs. The paper describes modular multivariable control, MMC properties, tuning considerations, application at the DCS level, constraints handling, and process application and results.

Chia, T.L.; Lefkowitz, I. [ControlSoft, Inc., Cleveland, OH (United States); Tamas, P.D. [Marathon Oil Co., Robinson, IL (United States)

1996-10-01T23:59:59.000Z

409

Home: Directives, Delegations, and Requirements  

NLE Websites -- All DOE Office Websites

content. | Skip to navigation content. | Skip to navigation Site Map Contact Us Current Documents Archived Documents Entire Site only in current section Advanced Search... U.S. Department of Energy Office of Management Directives, Delegations, and Requirements Sections Home Directives Current Directives Draft Directives Archives Delegations Current Delegations Current Designations Rescinded Organizations' Assignment of Responsibility Development & Review RevCom Writers' Tools DPC Corner References News and Updates Help Personal tools You are here: Office of Management » Directives, Delegations, and Requirements Info Home Directives are the Department of Energy's primary means of establishing policies, requirements, responsibilities, and procedures for Departmental elements and contractors. Directive

410

Class 1E digital systems studies  

SciTech Connect

This document is furnished as part of the effort to develop NRC Class 1E Digital Computer Systems Guidelines which is Task 8 of USAF Rome Laboratories Contract F30602-89-D-0100. The report addresses four major topics, namely, computer programming languages, software design and development, software testing and fault tolerance and fault avoidance. The topics are intended as stepping stones leading to a Draft Regulatory Guide document. As part of this task a small scale survey of software fault avoidance and fault tolerance practices was conducted among vendors of nuclear safety related systems and among agencies that develop software for other applications demanding very high reliability. The findings of the present report are in part based on the survey and in part on review of software literature relating to nuclear and other critical installations, as well as on the authors` experience in these areas.

Hecht, H.; Tai, A.T.; Tso, K.S. [SoHaR, Inc., Beverly Hills, CA (United States)

1993-10-01T23:59:59.000Z

411

Direct Aerosol Forcing Uncertainty  

DOE Data Explorer (OSTI)

Understanding sources of uncertainty in aerosol direct radiative forcing (DRF), the difference in a given radiative flux component with and without aerosol, is essential to quantifying changes in Earth's radiation budget. We examine the uncertainty in DRF due to measurement uncertainty in the quantities on which it depends: aerosol optical depth, single scattering albedo, asymmetry parameter, solar geometry, and surface albedo. Direct radiative forcing at the top of the atmosphere and at the surface as well as sensitivities, the changes in DRF in response to unit changes in individual aerosol or surface properties, are calculated at three locations representing distinct aerosol types and radiative environments. The uncertainty in DRF associated with a given property is computed as the product of the sensitivity and typical measurement uncertainty in the respective aerosol or surface property. Sensitivity and uncertainty values permit estimation of total uncertainty in calculated DRF and identification of properties that most limit accuracy in estimating forcing. Total uncertainties in modeled local diurnally averaged forcing range from 0.2 to 1.3 W m-2 (42 to 20%) depending on location (from tropical to polar sites), solar zenith angle, surface reflectance, aerosol type, and aerosol optical depth. The largest contributor to total uncertainty in DRF is usually single scattering albedo; however decreasing measurement uncertainties for any property would increase accuracy in DRF. Comparison of two radiative transfer models suggests the contribution of modeling error is small compared to the total uncertainty although comparable to uncertainty arising from some individual properties.

Mccomiskey, Allison

412

Preservation Planning for Digital Information: Final Report of the HVC2 Digital Preservation Task Force  

E-Print Network (OSTI)

on Storage at the PADI site, http://www.nla.gov.au/padi/topics/10.html. 9 through either transformation or emulation processes; and display rendered objects to the user. These services work in conjunction with Indexing and Search Services. Status..., http://www.nla.gov.au/padi/topics/18.html) Architectural Framework ? Identification / Authentication / Authorization o There are no specific ?best practices? regarding I/A/A for digital preservation per se. The primary requirements...

Fyffe, Richard; Ludwig, Deborah; Roach, Mary; Schulte, Becky; Warner, Beth Forrest

2004-11-11T23:59:59.000Z

413

Statement on Digital Data Management | U.S. DOE Office of Science...  

Office of Science (SC) Website

colleagues, to providing free, unrestricted access to the public through, for example, a web-based platform. Digital Research Data: The term digital data encompasses a wide variety...

414

E-Print Network 3.0 - analog to digital converters Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

The objective of this lab... is to analyze, construct, and test a four bit weighted resistor digital to analog converter. The required... digital to ... Source: Landers, Robert...

415

Directional Drilling Systems | Open Energy Information  

Open Energy Info (EERE)

Directional Drilling Systems Directional Drilling Systems Jump to: navigation, search Geothermal ARRA Funded Projects for Directional Drilling Systems Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":200,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026 further results","default":"","geoservice":"google","zoom":14,"width":"600px","height":"350px","centre":false,"layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","icon":"","visitedicon":"","forceshow":true,"showtitle":true,"hidenamespace":false,"template":false,"title":"","label":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"locations":[{"text":"

416

The three and a half layers of dynamics : analog, digital, semi-digital, analog  

E-Print Network (OSTI)

Quantum theory is extremely successful in explaining most physical phenomena, and is not contradicted by any experiment. Yet, the theory has many puzzling features : the occurrence of probabilities, the unclear distinction between the microscopic and the macroscopic, the unexplained absence of superpositions in positions of macroscopic objects, the dependence of the theory on an external classical time, and the experimentally verified but peculiar `influence' outside the light-cone in EPR experiments. These puzzles point towards a conflict between quantum theory and our present understanding of spacetime structure, and suggest the existence of a deeper theory. In this essay we make the case that in the underlying theory the matter and spacetime degrees of freedom are non-commuting matrices, and yet the dynamics is analog. A digital quantum-theory like dynamics for matter as well as spacetime emerges in the statistical thermodynamic approximation to this deeper theory. When most of the matter clumps into macroscopic structures, it is shown to behave classically, and it induces classical dynamics on spacetime; this is the eventual analog limit, our macroscopic world. In between the digital layer and the uppermost analog layer is the realm of standard quantum theory - microscopic objects and their interaction with measuring apparatuses on a classical spacetime background : the semi-digital approximation. Such a multi-layered description of dynamics can explain the puzzling features of quantum theory, and is testable by ongoing laboratory experiments.

T. P. Singh

2011-06-05T23:59:59.000Z

417

Foreign Direct Investment in U  

Gasoline and Diesel Fuel Update (EIA)

Foreign Direct Investment in U.S. Energy in 1998 Foreign Direct Investment in U.S. Energy in 1998 Foreign Direct Investment Foreign Direct Investment Foreign Direct Investment Foreign Direct Investment in U.S. Energy in U.S. Energy in U.S. Energy in U.S. Energy in 1998 in 1998 in 1998 in 1998 November 2000 Energy Information Administration/Foreign Direct Investment in U.S. Energy in 1998 Contacts This report was prepared in the Office of Energy Markets and End Use of the Energy Information Administration, U.S. Department of Energy, under the general direction of W. Calvin Kilgore. The project was directed by Mark E. Rodekohr, Director of the Energy Markets and Contingency Information Division (202) 586-1441, and Mary E. Northup, the Team Leader for Financial Analysis (202) 586-1383. Specific technical information concerning this

418

SRNL - Directions and Maps  

NLE Websites -- All DOE Office Websites (Extended Search)

Map of SRS, with Georgia and South Carolina Map of SRS, with Georgia and South Carolina Directions and Maps The Savannah River National Laboratory is located at the Savannah River Site , a 310 square mile site located in the southeastern coastal area of the United States in the state of South Carolina. It is bordered to the west by the Savannah River and Georgia, and is close to several major cities, including Augusta and Savannah (Ga.), Columbia, Greenville, and Charleston (S.C.). It is in an area residents refer to as the Central Savannah River Area, or CSRA. The Aiken County Technology Laboratory (which houses SRNL's biotechnology laboratories and certain waste treatment technology laboratories) and the Center for Hydrogen Research are located at Aiken County's Savannah River Research Campus, located adjacent to SRS.

419

Natural discharge after pulse and cooperative electrodes to enhance droplet velocity in digital microfluidics  

SciTech Connect

Digital Microfluidics (DMF) is a promising technology for biological/chemical micro-reactions due to its distinct droplet manageability via electronic automation, but the limited velocity of droplet transportation has hindered DMF from utilization in high throughput applications. In this paper, by adaptively fitting the actuation voltages to the dynamic motions of droplet movement under real-time feedback monitoring, two control-engaged electrode-driving techniques: Natural Discharge after Pulse (NDAP) and Cooperative Electrodes (CE) are proposed. They together lead to, for the first time, enhanced droplet velocity with lower root mean square voltage value.

Chen, Tianlan; Dong, Cheng; Gao, Jie; Jia, Yanwei; Mak, Pui-In, E-mail: pimak@umac.mo; Vai, Mang-I; Martins, Rui P. [State Key Laboratory of Analog and Mixed-Signal VLSI and FST-ECE, University of Macau, Macao (China)] [State Key Laboratory of Analog and Mixed-Signal VLSI and FST-ECE, University of Macau, Macao (China)

2014-04-15T23:59:59.000Z

420

Memorandum: Direction and Guidance for Implementing Direct DOE Relationship  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Direction and Guidance for Implementing Direct DOE Direction and Guidance for Implementing Direct DOE Relationship & Funding for the EMSSAB Memorandum: Direction and Guidance for Implementing Direct DOE Relationship & Funding for the EMSSAB From: Designated Federal Officer, Sandra L. Waisley (EM-11) To: SSAB Members (G. Stegner, J. Reising, G. Bowman, T. Taylor, C. Gertz, B. Murphie, S. McCracken, M. Marvin, J. Rampe, A. Doswell, C. Anderson, B. Wethington, S. Brennan, K. Kozeliski, D. Dollins, P. Halsey, Y. Sherman, L. Bratcher, R. Warther, K. Klein, R. Schepens, F. Lockhart, J. Allison, R. Erickson, E. Sellers, K. Carlson, G. Boyd, R. Butler) The memorandum informs of Assistant Secrectary Roberson's direction and guidance for implementing a DOE direct relationship and funding approach for EM's Site-Specific Advisory Board (EMSSAB).

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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421

Fact #720: March 26, 2012 Eleven Percent of New Light Trucks Sold have Gasoline Direct Injection  

Energy.gov (U.S. Department of Energy (DOE))

Gasoline direct fuel injection (GDI) allows fuel to be injected directly into the cylinder so the timing and shape of the fuel mist can be controlled more precisely. The improved combustion and...

422

Rank and directional entropy Rank and directional entropy  

E-Print Network (OSTI)

Rank and directional entropy Rank and directional entropy E. Arthur (Robbie) Robinson (Joint work with Ayse Sahin) The George Washington University Talk at KIAS, Seoul, Korea. September 27, 2010 #12;Rank and directional entropy Outline 1 Introduction 2 Finite rank, Z case 3 The formal definition 4 The Z2 case 5

Robinson Jr., E. Arthur (Robbie)

423

AgNIC Pre-conference 2009 “If It’s Digital and In Google – Then They Will Come”  

E-Print Network (OSTI)

Uncompressed raw image files Bitmap (.bmp) Tagged Image File Format (TIFF) (.tif) Digitization Concepts -- Image Quality Compressed derivative files Used for easier transmission over the web due to smaller size Joint Photographic Experts Group (JPEG) (.jpg... or nothing Image too skewed, not straight Too much dark page gutter Adobe Acrobat Professional: Create New PDF from Multiple Files Browse to File Folder Select Multiple Files Using Control Key Added File List Processing into PDF File Save New File as Bull...

McGeachin, Robert B.

2009-04-21T23:59:59.000Z

424

A 16 mm3 autonomous solar-powered sensor node with bi-directional optical communication for distributed sensor net-  

E-Print Network (OSTI)

Abstract A 16 mm3 autonomous solar-powered sensor node with bi- directional optical communication for distributed sensor net- works has been demonstrated. The device digitizes inte- grated sensor signals, a 2.6 mm2 SOI solar cell array, and a micromachined four-quadrant corner-cube retroreflector (CCR

Kahn, Joseph M.

425

Optical domain analog to digital conversion methods and apparatus  

DOE Patents (OSTI)

Methods and apparatus for optical analog to digital conversion are disclosed. An optical signal is converted by mapping the optical analog signal onto a wavelength modulated optical beam, passing the mapped beam through interferometers to generate analog bit representation signals, and converting the analog bit representation signals into an optical digital signal. A photodiode receives an optical analog signal, a wavelength modulated laser coupled to the photodiode maps the optical analog signal to a wavelength modulated optical beam, interferometers produce an analog bit representation signal from the mapped wavelength modulated optical beam, and sample and threshold circuits corresponding to the interferometers produce a digital bit signal from the analog bit representation signal.

Vawter, Gregory A

2014-05-13T23:59:59.000Z

426

A Sensorless Direct Torque Control Scheme Suitable for Electric Vehicles  

E-Print Network (OSTI)

is a good candidate for EVs propulsion. Index Terms--Electric vehicle, Induction motor, sensorless drive; however, they have not yet used the most remarkable advantages of electric motors. Indeed, an electric, Algeria. The electric propulsion system is the heart of EVs [1-2]. It consists of the motor drive

Paris-Sud XI, Université de

427

Direct versus Facility Centric Load Control for Automated Demand Response  

E-Print Network (OSTI)

Interoperable Automated Demand Response Infrastructure.and Techniques for Demand Response. LBNL Report 59975. Mayand Communications for Demand Response and Energy Efficiency

Piette, Mary Ann

2010-01-01T23:59:59.000Z

428

Direct control of air gap flux in permanent magnet machines  

DOE Patents (OSTI)

A method and apparatus for field weakening in PM machines uses field weakening coils (35, 44, 45, 71, 72) to produce flux in one or more stators (34, 49, 63, 64), including a flux which counters flux normally produced in air gaps between the stator(s) (34, 49, 63, 64) and the rotor (20, 21, 41, 61) which carries the PM poles. Several modes of operation are introduced depending on the magnitude and polarity of current in the field weakening coils (35, 44, 45, 71, 72). The invention is particularly useful for, but not limited to, the electric vehicle drives and PM generators.

Hsu, John S. (Oak Ridge, TN)

2000-01-01T23:59:59.000Z

429

Direct energy converter controllers for switched reluctance motor operation.  

E-Print Network (OSTI)

??There is increasing demand for simple motor drives offering high reliability and fault tolerance in applications such as the aerospace actuator industry, with the development… (more)

Goodman, Andrew Simon

2007-01-01T23:59:59.000Z

430

Towards adaptive and directable control of simulated creatures  

E-Print Network (OSTI)

Interactive animation is used ubiquitously for entertainment and for the communication of ideas. Active creatures, such as humans, robots, and animals, are often at the heart of such animation and are required to interact ...

Abe, Yeuhi

2007-01-01T23:59:59.000Z

431

Bioenergy Technologies Office New Directions  

Energy.gov (U.S. Department of Energy (DOE))

New Directions and New Business Opportunities for BETO Valerie Reed, Acting Director, BETO, U.S. Department of Energy

432

Multiple direction vibration fixture  

DOE Patents (OSTI)

An apparatus for simulating a rocket launch environment on a test item undergoing centrifuge testing by subjecting the item simultaneously or separately to vibration along an axis of centripetal force and along an axis perpendicular to the centripetal force axis. The apparatus includes a shaker motor supported by centrifuge arms and a right angle fixture pivotally connected to one of the shaker motor mounts. When the shaker motor vibrates along the centripetal force axis, the vibrations are imparted to a first side of the right angle fixture. The vibrations are transmitted 90 degrees around the pivot and are directed to a second side of the right angle fixture which imparts vibrations perpendicular to the centripetal force axis. The test item is in contact with a third side of the right angle fixture and receives both centripetal-force-axis vibrations and perpendicular axis vibrations simultaneously. A test item can be attached to the third side near the flexible coupling or near the air bag to obtain vibrations along the centripetal force axis or transverse to the centripetal force axis.

Cericola, Fred (Albuquerque, NM); Doggett, James W. (Albuquerque, NM); Ernest, Terry L. (Albuquerque, NM); Priddy, Tommy G. (Rockville, MD)

1991-01-01T23:59:59.000Z

433

Cofinal types of directed orders  

E-Print Network (OSTI)

, ) directed partial orders #12;Cofinal types (P, ), (Q, ) directed partial orders Tukey reducibility: (P orders Tukey reducibility: (P, ) T (Q, ) if f : P Q X P unbounded = f [X] Q unbounded g : Q P Y Q cofinal = g[Y ] P cofinal #12;Cofinal types (P, ), (Q, ) directed partial orders Tukey reducibility: (P

Mátrai, Tamás

434

NUCLEAR PLANT AND CONTROL  

E-Print Network (OSTI)

for the digital protection systems of a nuclear power plant. When spec- ifying requirements for software and CRSA processes are described using shutdown system 2 of the Wolsong nuclear power plants as the digital, the missiles, and the digital protection systems embed- ded in nuclear power plants. Obviously, safety

435

eGY-Africa: Addressing the Digital Divide for Science in Africa  

SciTech Connect

Adoption of information and communication technologies and access to the Internet is expanding in Africa, but because of the rapid growth elsewhere, a Digital Divide between Africa and the rest of the world exists, and the gap is growing. In many sub-Saharan African countries, education and research sector suffers some of the worst deficiencies in access to the Internet, despite progress in development of NRENs - National Research and Education (cyber) Networks. By contrast, it is widely acknowledged in policy statements from the African Union, the UN, and others that strength in this very sector provides the key to meeting and sustaining Millennium Development Goals. Developed countries with effective cyber-capabilities proclaim the benefits to rich and poor alike arising from the Information Revolution. This is but a dream for many scientists in African institutions. As the world of science becomes increasingly Internet-dependent, so they become increasingly isolated. eGY-Africa is a bottom-up initiative by African scientists and their collaborators to try to reduce this Digital Divide by a campaign of advocacy for better institutional facilities. Four approaches are being taken. The present status of Internet services, problems, and plans are being mapped via a combination of direct measurement of Internet performance (the PingER Project) and a questionnaire-based survey. Information is being gathered on policy statements and initiatives aimed at reducing the Digital Divide, which can be used for arguing the case for better Internet facilities. Groups of concerned scientists are being formed at the national, regional levels in Africa, building on existing networks as much as possible. Opinion in the international science community is being mobilized. Finally, and perhaps most important of all, eGY-Africa is seeking to engage with the many other programs, initiatives, and bodies that share the goal of reducing the Digital Divide - either as a direct policy objective, or indirectly as a means to an end, such as the development of an indigenous capability in science and technology for national development. The expectation is that informed opinion from the scientific community at the institutional, national, and international levels can be used to influence the decision makers and donors who are in a position to deliver better Internet capabilities.

Barton, C.E.; /Australian Natl. U., Canberra; Amory-Mazaudier, C.; /Lab.Phys.Plasmas, Saint Maur des Fosses; Barry, B.; /Assoc.African Univ., Accra; Chukwuma; /Olabisi Onabanjo U.; Cottrell, R.L.; /SLAC; Kalim, U.; /Pakistan Natl. U.; Mebrahtu, A.; /Mekelle U.; Petitdidier, M.; /Lab. d'Atmos., Velizy; Rabiu, B.; /Federal Tech. U., Akure; Reeves, C.; /Earthworks bv, Delft; ,

2010-06-16T23:59:59.000Z

436

Transient digitizer with displacement current samplers  

DOE Patents (OSTI)

A low component count, high speed sample gate, and digitizer architecture using the sample gates is based on use of a signal transmission line, a strobe transmission line and a plurality of sample gates connected to the sample transmission line at a plurality of positions. The sample gates include a strobe pickoff structure near the strobe transmission line which generates a charge displacement current in response to propagation of the strobe signal on the strobe transmission line sufficient to trigger the sample gate. The sample gate comprises a two-diode sampling bridge and is connected to a meandered signal transmission line at one end and to a charge-holding cap at the other. The common cathodes are reverse biased. A voltage step is propagated down the strobe transmission line. As the step propagates past a capacitive pickoff, displacement current i=c(dv/dT), flows into the cathodes, driving the bridge into conduction and thereby charging the charge-holding capacitor to a value related to the signal. A charge amplifier converts the charge on the charge-holding capacitor to an output voltage. The sampler is mounted on a printed circuit board, and the sample transmission line and strobe transmission line comprise coplanar microstrips formed on a surface of the substrate. Also, the strobe pickoff structure may comprise a planar pad adjacent the strobe transmission line on the printed circuit board.

McEwan, Thomas E. (Livermore, CA)

1996-01-01T23:59:59.000Z

437

Transient digitizer with displacement current samplers  

DOE Patents (OSTI)

A low component count, high speed sample gate, and digitizer architecture using the sample gates is based on use of a signal transmission line, a strobe transmission line and a plurality of sample gates connected to the sample transmission line at a plurality of positions. The sample gates include a strobe pickoff structure near the strobe transmission line which generates a charge displacement current in response to propagation of the strobe signal on the strobe transmission line sufficient to trigger the sample gate. The sample gate comprises a two-diode sampling bridge and is connected to a meandered signal transmission line at one end and to a charge-holding cap at the other. The common cathodes are reverse biased. A voltage step is propagated down the strobe transmission line. As the step propagates past a capacitive pickoff, displacement current i=c(dv/dT), flows into the cathodes, driving the bridge into conduction and thereby charging the charge-holding capacitor to a value related to the signal. A charge amplifier converts the charge on the charge-holding capacitor to an output voltage. The sampler is mounted on a printed circuit board, and the sample transmission line and strobe transmission line comprise coplanar microstrips formed on a surface of the substrate. Also, the strobe pickoff structure may comprise a planar pad adjacent the strobe transmission line on the printed circuit board. 16 figs.

McEwan, T.E.

1996-05-21T23:59:59.000Z

438

T-724: Microsoft Security Advisory: Fraudulent digital certificates could  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

724: Microsoft Security Advisory: Fraudulent digital certificates 724: Microsoft Security Advisory: Fraudulent digital certificates could allow spoofing T-724: Microsoft Security Advisory: Fraudulent digital certificates could allow spoofing September 22, 2011 - 12:45pm Addthis PROBLEM: Microsoft Security Advisory: Fraudulent digital certificates could allow spoofing. PLATFORM: Microsoft Untrusted Certificate Store: DigiNotar root certificates ABSTRACT: Microsoft has released a Microsoft security advisory about this issue for IT professionals. reference LINKS: MS Article ID: 2616676 Microsoft Security Advisory: 2607712 DOE-CIRC Tech Bulletin: T-706 IMPACT ASSESSMENT: Medium Discussion: The Microsoft update revokes the trust of the following DigiNotar root certificates by putting them in the Microsoft Untrusted Certificate Store:

439

Digital Object Identifiers (DOI) | Scientific and Technical Information  

Office of Scientific and Technical Information (OSTI)

Digital Object Identifiers (DOI) Digital Object Identifiers (DOI) Print page Print page Email page Email page A Digital Object Identifier (DOI) is a permanent, unique name used in the web-based global naming and resolution system that provides for the identification, retrieval, exchange and maintenance of intellectual property. DOIs assist the publishing community with electronic commerce and copyright management of digital objects published on the Internet. Development of the DOI System was initiated in 1997 by the Association of American Publishers, and is now managed by the International DOI Foundation. The DOI System was initially developed by the publishing community but is now a non-profit collaboration to develop infrastructure for persistent identification and management of content. Approximately 2000

440

Digital Book Showcases Washington Wind Project | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Digital Book Showcases Washington Wind Project Digital Book Showcases Washington Wind Project Digital Book Showcases Washington Wind Project June 24, 2010 - 12:09pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE In what looks and feels more like an e-book on the iPad than a website, a new digital book by Cannon Power Group, a San Diego-based developer of utility-scale wind, tells the story of the construction of a 400 MW wind farm along a 26-mile stretch in Goldendale, Washington, located on a ridgeline plateau about 125 miles east of Portland, Oregon. "The New American Farm" chronicles the stages of the Windy Flats/Windy Point project in seven interactive chapters: from "Prospecting" (finding the right site) to "Planting" (installing 175, 300-foot turbines) to

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Determinants of the diffusion of U.S. digital telecommunications  

Science Journals Connector (OSTI)

This paper examines the diffusion of digital switches from 1983 to 1996. It expands upon the existing literature by extending the data available back an additional six years and by adding independent companies...

Allan Shampine

2001-02-01T23:59:59.000Z

442

Users, technology and space in libraries in the digital age  

E-Print Network (OSTI)

This thesis is a user research study of emerging issues in the use of libraries as public spaces and as information repositories in the digital age. Till recently strong physicality was attached to the library with the ...

G-Chandorkar, Tripti (Gore-Chandorkar)

2005-01-01T23:59:59.000Z

443

Beyond `Further': Collaboration, Community and Compassion in the Digital Age  

E-Print Network (OSTI)

In this paper, I outline specific approaches that may be taken to bring the Composition classroom into the digital, collaborative present, and close by questioning what further practices might be explored to more deeply ...

DeRoux, Margaux

2011-04-25T23:59:59.000Z

444

Digital cleaning and “dirt” layer visualization of an oil painting  

Science Journals Connector (OSTI)

We demonstrate a new digital cleaning technique which uses a neural network that is trained to learn the transformation from dirty to clean segments of a painting image. The inputs and...

Palomero, Cherry May T; Soriano, Maricor N

2011-01-01T23:59:59.000Z

445

11.204 Planning, Communications, and Digital Media, Fall 2002  

E-Print Network (OSTI)

Subject focuses on methods of digital visualization and communication and their application to planning issues. Lectures introduce methods for describing or representing a place and its residents, for simulating actions ...

Hoyt, Lorlene M.

446

Lensless digital holographic microscope with light-emitting diode illumination  

Science Journals Connector (OSTI)

We demonstrate the operation of a digital in-line microscope with LED illumination. We show with a practical example that, for typical setups, the limited temporal coherence and the...

Repetto, L; Piano, E; Pontiggia, C

2004-01-01T23:59:59.000Z

447

Hybrid re Assembage : bridging traditional craft and digital design  

E-Print Network (OSTI)

Hybrid reAssemblage is a design gestalt that lies at the cross-section of digital design practice and the tactile qualities of traditional craft. It spans a territory in which the value of artifacts is produced through ...

Zoran, Amit (Amit Shlomo)

2013-01-01T23:59:59.000Z

448

Exact One-pass Synthesis of Digital Microfluidic Biochips  

Science Journals Connector (OSTI)

With the advances of the microfluidic technology, the design of digital microfluidic biochips recently received significant attention. But thus far, the corresponding design tasks such as binding, scheduling, placement, and routing have usually been ...

Oliver Keszocze; Robert Wille; Tsung-Yi Ho; Rolf Drechsler

2014-06-01T23:59:59.000Z

449

Power optimization of algorithmic analog-to-digital converters  

Science Journals Connector (OSTI)

The dissertation presents techniques for power optimization in algorithmic analog-to-digital converters (ADCs) enabling realization of ultra low power data converters. Implantable biomedical devices and autonomous wireless sensor networks are among the ...

Steven Daniel Tucker / David M. Binkley

2005-01-01T23:59:59.000Z

450

Digital Diaries: What will become of our online memories?   

E-Print Network (OSTI)

is visited by 4 TTT|H|O? people a day‘ So what do w@ do?So what do people have to say? Question: Do yaw careAbstract Digital Diaries: What will become of our online

Moy, Chelsi

2014-01-01T23:59:59.000Z

451

Optimal digital system design in deep submicron technology  

E-Print Network (OSTI)

The optimization of a digital system in deep submicron technology should be done with two basic principles: energy waste reduction and energy-delay tradeoff. Increased energy resources obtained through energy waste reduction ...

Heo, Seongmoo, 1977-

2006-01-01T23:59:59.000Z

452

A Radiation Tolerant Phase Locked Loop Design for Digital Electronics  

E-Print Network (OSTI)

With decreasing feature sizes, lowered supply voltages and increasing operating frequencies, the radiation tolerance of digital circuits is becoming an increasingly important problem. Many radiation hardening techniques have been presented...

Kumar, Rajesh

2011-10-21T23:59:59.000Z

453

A STUDY ON THE DIGITAL INTEGRATED PLATFORM OF CHINA PARTICIPATORY  

E-Print Network (OSTI)

A STUDY ON THE DIGITAL INTEGRATED PLATFORM OF CHINA PARTICIPATORY RURAL COMMUNITY in August 2008 about rural informationization condition in different village area of Liaoning Province main bottleneck that rural informationization progress is slow in the course of Chinese rural

Boyer, Edmond

454

Tangible interfaces for manipulating aggregates of digital information  

E-Print Network (OSTI)

This thesis develops new approaches for people to physically represent and interact with aggregates of digital information. These support the concept of Tangible User Interfaces (TUIs), a genre of human-computer interaction ...

Ullmer, Brygg Anders

2002-01-01T23:59:59.000Z

455

Coal powder measurement by digital holography with expanded measurement area  

Science Journals Connector (OSTI)

The field of view of digital in-line holography for flow field diagnostics is restricted to a small volume due to the finite size and the low spatial resolution of the available CCD....

Wu, Yingchun; Wu, Xuecheng; Wang, Zhihua; Chen, Linghong; Cen, Kefa

2011-01-01T23:59:59.000Z

456

Comparison of Tracking Techniques Applied to Digital PIV  

Science Journals Connector (OSTI)

Digital Particle Image Velocimetry (DPIV) aims at flow visualization and measurement of flow dynamics in numerous applications, including hydrodynamics, combustion processes and aeronautical phenomena. The fluid is seeded with particles that follow the ...

2000-09-01T23:59:59.000Z

457

MUS420/EE367A Lecture 12 Wave Digital Filters  

E-Print Network (OSTI)

resistances, we obtain the following wave digital filter elements (the elementary one-ports): Inductor: v(t) i a port resistance (for reasons we'll discuss later). · In matrix notation, we readily see

Smith III, Julius Orion

458

Segmentation of Audio Visual Malay Digit Utterances Using Endpoint Detection  

Science Journals Connector (OSTI)

An endpoint detection algorithm is utilised for segmentation of audio video Malay utterances. An audio visual Malay speech database of subjects uttering numerical digits is used. Synchronization between video ...

Mohd Ridzuwary Mohd Zainal; Aini Hussain…

2013-01-01T23:59:59.000Z

459

ENGINEERINGREPORTS A Methodfor Extrapolationof MissingDigital Audio Data*  

E-Print Network (OSTI)

of the Audio Engineering Society, New York, ExENGINEERINGREPORTS A Methodfor Extrapolationof MissingDigital Audio Data* ROBERT C. MAHER, AES Member Department of Electrical Engineering and Center for Communication and Information Science

Maher, Robert C.

460

Designing Digital Games for Rural Children: A Study of Traditional Village Games in India  

E-Print Network (OSTI)

Developing world, digital divide, games, traditional games ACM Classification Keywords H.5.m. Information

Matsuda, Noboru

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Managed DirectX First Steps: Direct3D Basics and DirectX vs. GDI+  

Science Journals Connector (OSTI)

DirectX refers to a collection of Microsoft-created APIs and technologies that help developers more directly access the hardware features of a computer. It was originally released in 1996 as a way fo...

David Weller; Alexandre Santos Lobăo…

2004-01-01T23:59:59.000Z

462

CSE293 Computer Science & Engineering Design Laboratory Marklin Computer Controllable Model Trains Project  

E-Print Network (OSTI)

CSE293 Computer Science & Engineering Design Laboratory Marklin Computer Controllable Model Trains" of the system. The real time control is for, of all things, model railroading trains. If you had them as a kid trains, where there is digital control for every train (each train has an onboard computer), for switches

Demurjian, Steven A.

463

On Designing Mixed-Signal Programmable Fuzzy Logic Controllers as Embedded Subsystems in Standard CMOS Technologies  

E-Print Network (OSTI)

On Designing Mixed-Signal Programmable Fuzzy Logic Controllers as Embedded Subsystems in Standard analogue Fuzzy Logic Controller (FLC) is presented. Input and output signals are processed in the analog the choice of on-chip controllers becomes an interesting option. Digital Fuzzy Logic chips provide enough

Verleysen, Michel

464

Active vibration suppression of a exible structure using smart material and a modular control patch  

E-Print Network (OSTI)

Active vibration suppression of a ÂŻexible structure using smart material and a modular control of vibration suppression of a ÂŻexible structure using smart materials and a miniaturized digital controller and was developed by TRW for the United States Air Force for future space vibration control. In this research

465

Experimental Study of Active Vibration Suppression Structure Using Modular Control Patch*  

E-Print Network (OSTI)

Experimental Study of Active Vibration Suppression Structure Using Modular Control Patch* Gangbing results of vibration suppressicln of a flexible structure using a miniaturized digital controller, called for the United States Air Force for future space vibration control. In this research, the MCP is used

466

Coefficient quantization effects in block state variable digital filters  

E-Print Network (OSTI)

COEFFICIENT QUANTIZATION EFFECTS IN BLOCK STATE VARIABLE DIGITAL FILTERS A Thesis by KAB JOO LEE Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE August 1991 Major Subject: Electrical Engineering COEFFICIENT QIJANTIZATIOU EFFECTS IN l3LOCI~ STATE VARIABLE DIGITAL FILTERS A Thesis hs IiAB JOO LEE Approved as to style and content by: WVilliam G. )3liss (Chair of Comnaittee) Norman C...

Lee, Kab Joo

2012-06-07T23:59:59.000Z

467

Digital Computer Methods for Processing Neutron Radioactivation Analysis Data  

E-Print Network (OSTI)

DIGITAL COMPUTER METHODS FOR PROCESSING NEUTRON RADIOACTIVATION ANALYSIS DATA A Thesis By William Elton Kuykendall, Jr. Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial fulfillment of tbe... retiuirements for the degree of MASTER OF SCIENCE May 1960 Major Subject: Electrical Engineering DIGITAL COMPUTER METHODS FOR PROCESSING NEUTRON RADIOACTIVATION ANALYSIS DATA A Thesis By William Elton Kuykendall, Jr. p oved as to sty e content by: Co...

Kuykendall, William E

1960-01-01T23:59:59.000Z

468

Structural vibration measurement and analysis using a novel digital sensor  

E-Print Network (OSTI)

STRUCTURAL VIBRATION MEASUREMENT AND ANALYSIS USING A NOVEL DIGITAL SENSOR A Thesis by ELIZABETH ALTAGRACIA MINIER 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 May 1992 Major Subject: Aerospace Engineering STRUCTURAL VIBRATION MEASUREMENT AND ANALYSIS USING A NOVEL DIGITAL SENSOR A Thesis by ELIZABETH ALTAGRACIA MINIER Approved as to style and content by: Thomas C. Pollock (Chair...

Minier, Elizabeth Altagracia

2012-06-07T23:59:59.000Z

469

Microphone array with computer vision based directivity  

Science Journals Connector (OSTI)

In the field of acoustic signal processing one of the most popular areas of research is that of microphone arrays. As a small research project in this field a microphone array system with adjustable polar response will be developed. To make research more innovative and multi-disciplinary the polar response of the array will be controlled by a facial tracking system implemented with computer vision techniques. This research will take part as a means of combining coursework and research for courses in engineering acoustics computer vision and real-time digital signal processing at the University of Miami. Before any physical testing simulations will be performed in MATLAB to determine optimum array configurations and to analyze various facial tracking and dsp algorithms. Then using a Texas Instruments TMS320C6713 DSP on a DSK audio target board and writing code in C ASSEMBLY and MATLAB physical tests will be conducted to analyze performance of design. A MEMS microphone model will likely be used for its small size and low cost. A Microsoft Kinect and compatible desktop computer will be used for the computer vision interface. From there results will be analyzed and further research in the area proposed.

Marc Messier; Jordan Reimers

2013-01-01T23:59:59.000Z

470

HVDC control developments - addressing system requirements  

SciTech Connect

This article describes typical high voltage direct current (HVDC) control systems and some of the new developments in the control area. HVDC control systems are showing their flexible characteristics as demonstrated, for example, by the new modulation, torsional damping, and alternating current voltage and reactive power controllers. Extensive studies are conducted to design and integrate such controllers into HVDC systems and to assure against any detrimental interactions within the total control system. 8 figures.

Hauth, R.L.; Patel, H.S.; Piwko, R.J.

1984-01-01T23:59:59.000Z

471

Mono and Colour QSIF Digital Video CMOS Image Sensors cd5301-6301f: Rev 3.0, 25 September 2000 1/50  

E-Print Network (OSTI)

Exposure control Automatic ( to +44dB) Analogue gain +18dB Signal/Noise ratio 36dB Supply voltage 5V DC +/- 5% Supply current VV5301-VV6301 2.9mA (standby) 14.6mA (active) Operating temperature (ambient) 0o (colourised) produce digital video output. The video streams from both devices contain embedded control data

Baltes, Jacky

472

AVESTAR® - Control  

NLE Websites -- All DOE Office Websites (Extended Search)

Control Control AVESTAR control system efforts are focused on development of computational approaches for simulation and advanced controls for energy systems. Power generation technologies are growing more sophisticated and require control strategies and systems to be updated to allow plant owners to take full advantage of their increased capabilities. A well designed control system can provide the ability to hit and maintain setpoints without oscillation for optimum power plant operation. Implementation of complex control systems developed through advanced computational approaches will increase efficiency and reduce emissions. The AVESTAR team is focusing on the following three areas of process control research: 1) Plant-wide control system design, 2) Advanced regulatory control, and 3) Advanced process control. Process control models, methods, and tools are developed and applied to a wide variety of energy systems ranging from smart plant to smart grid.

473

Model predictive torque control of a Switched Reluctance Motor  

Science Journals Connector (OSTI)

The strongly nonlinear magnetic characteristic of Switched Reluctance Motors (SRMs) makes their torque control a challenging task. In contrast to standard current-based control schemes, we use Model Predictive Control (MPC) and directly manipulate the ...

Helfried Peyrl; Georgios Papafotiou; Manfred Morari

2009-02-01T23:59:59.000Z

474

Automatic Control Laboratory ETH, Zurich  

E-Print Network (OSTI)

Automatic Control Laboratory ETH, Z¨urich Physikstrasse 3 8092 Z¨urich, Switzerland +41 44 632 22 from the airport to Z¨urich city and goes directly past ETH. There are ticket machines outside 71 How to get to the Automatic Control Laboratory (IfA) From the Z¨urich airport: · By Taxi. Taxi

Lygeros, John

475

DemandDirect | Open Energy Information  

Open Energy Info (EERE)

DemandDirect DemandDirect Jump to: navigation, search Name DemandDirect Place Woodbury, Connecticut Zip 6798 Sector Efficiency, Renewable Energy, Services Product DemandDirect provides demand response, energy efficiency, load management, and distributed generation services to end-use electricity customers in order to reduce electricity consumption, improve grid reliability, and promote renewable energy. Coordinates 44.440496°, -72.414991° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.440496,"lon":-72.414991,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

476

Device Oriented Project Controller  

SciTech Connect

This proposal is directed at the issue of developing control systems for very large HEP projects. A de-facto standard in accelerator control is the Experimental Physics and Industrial Control System (EPICS), which has been applied successfully to many physics projects. EPICS is a channel based system that requires that each channel of each device be configured and controlled. In Phase I, the feasibility of a device oriented extension to the distributed channel database was demonstrated by prototyping a device aware version of an EPICS I/O controller that functions with the current version of the channel access communication protocol. Extensions have been made to the grammar to define the database. Only a multi-stage position controller with limit switches was developed in the demonstration, but the grammar should support a full range of functional record types. In phase II, a full set of record types will be developed to support all existing record types, a set of process control functions for closed loop control, and support for experimental beam line control. A tool to configure these records will be developed. A communication protocol will be developed or extensions will be made to Channel Access to support introspection of components of a device. Performance bench marks will be made on both communication protocol and the database. After these records and performance tests are under way, a second of the grammar will be undertaken.

Dalesio, Leo; Kraimer, Martin

2013-11-20T23:59:59.000Z

477

Wind Direct Ltd | Open Energy Information  

Open Energy Info (EERE)

Wind Direct Ltd Wind Direct Ltd Place Solihull, United Kingdom Zip B91 2PQ Sector Wind energy Product Develops small wind farms (1-5MW) particularly for industrial customers. HgCapital provides working capital to the company and holds majority ownership of the wind assets. Coordinates 52.415065°, -1.777849° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":52.415065,"lon":-1.777849,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

478

NREL: Learning - Geothermal Direct Use  

NLE Websites -- All DOE Office Websites (Extended Search)

Direct Use Direct Use Photo of alligators on a farm. Geothermally heated waters allow alligators to thrive on a farm in Colorado, where temperatures can drop below freezing. Geothermal reservoirs of hot water, which are found a few miles or more beneath the Earth's surface, can be used to provide heat directly. This is called the direct use of geothermal energy. Geothermal direct use has a long history, going back to when people began using hot springs for bathing, cooking food, and loosening feathers and skin from game. Today, hot springs are still used as spas. But there are now more sophisticated ways of using this geothermal resource. In modern direct-use systems, a well is drilled into a geothermal reservoir to provide a steady stream of hot water. The water is brought up through

479

Evaluation of four selected servo hand controls for severely handicapped drivers  

E-Print Network (OSTI)

CURRENT TRENDS IN AUTOMOTIVE ADAPTIVE CONTROLS Mechanical Adaptive Controls Power Assist Adaptive Controls Joystick Controls METHOD Subjects The Tracking Task Apparatus DATA REDUCTION Analog to Digital Conversion Data Cleanup Calculation... as the dependent variable ~ ~ ~ - ~ . ~ ~ ~ A comparison of the learning rates for able-bodi. ed and handicapped groups with acceleration/decelera- tion changes as the dependent variable ~ . . ~ Page 45 CURRENT TRENDS IN AUTOMOTIVE ADAPTIVE CONTROLS...

Sexton, Donna Jean

2012-06-07T23:59:59.000Z

480

Policy Procedure Administrative Directive Title: _____________________________________  

E-Print Network (OSTI)

Policy ­ Procedure ­ Administrative Directive Title: _____________________________________ Policy-President _____________ See also: Related Policies, Procedures and Agreements: Relevant Legislation and Regulations: ____________________________________________________________________________ Background and Purpose: ____________________________________________________________________________ Policy

Northern British Columbia, University of

Note: This page contains sample records for the topic "direct digital controls" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Direct cooled power electronics substrate  

DOE Patents (OSTI)

The disclosure describes directly cooling a three-dimensional, direct metallization (DM) layer in a power electronics device. To enable sufficient cooling, coolant flow channels are formed within the ceramic substrate. The direct metallization layer (typically copper) may be bonded to the ceramic substrate, and semiconductor chips (such as IGBT and diodes) may be soldered or sintered onto the direct metallization layer to form a power electronics module. Multiple modules may be attached to cooling headers that provide in-flow and out-flow of coolant through the channels in the ceramic substrate. The modules and cooling header assembly are preferably sized to fit inside the core of a toroidal shaped capacitor.

Wiles, Randy H [Powell, TN; Wereszczak, Andrew A [Oak Ridge, TN; Ayers, Curtis W. (Kingston, TN) [Kingston, TN; Lowe, Kirk T. (Knoxville, TN) [Knoxville, TN

2010-09-14T23:59:59.000Z

482

Arbitrarily-controllable programmable aperture light field cameras : design theory, and applications to image deconvolution & 3-dimensional scanning  

E-Print Network (OSTI)

This thesis describes a new class of programmable-aperture light field cameras based on an all-digital, grayscale aperture. A number of prototypes utilizing this arbitrarily-controllable programmable aperture (ACPA) light ...

Milnes, Thomas Bradford

2013-01-01T23:59:59.000Z

483

Practical Maintenance of Digital Systems: Guidance to Maximize the Benefits of Digital Technology for the Maintenance of Digital Systems and Plant Equipment  

SciTech Connect

This report presents detailed guidance for the maintenance and testing of modern digital systems. The guidance provides practical means for plants to take advantage of the increased diagnostic and self-test capabilities of these systems. It helps plants avoid mistakes in design and installation that could lead to increased maintenance burden and decreased system reliability and availability.

Hill, D; Scarola, K

2004-10-30T23:59:59.000Z

484

Anticipatory control of turbine generators  

E-Print Network (OSTI)

of Turbine Generators. (Nay 1971) Freddie Laurel Nessec, B. S. E. E, , Texas Tech University; Directed by: Professor J. S . Denison An investigation is made of the use of predicted loads in controlling turbine generators. A perturbation model of a turbine... generator is presented along with typical parameter values. A study is made of the effects of applying control action before a load change occurs. Two predictive control schemes are investi- gated using a load cycle which incorporates both ramp and step...

Messec, Freddie Laurel

1971-01-01T23:59:59.000Z

485

Bosch Sensortec Digital, triaxal acceleration sensor  

E-Print Network (OSTI)

for mobile applications. The sensor can be programmed to optimize functionality, perfor- mance and power controllers. BMA150 target applications Advanced power management for mobile devices HDD protection Drop Switchable g-range and bandwidth Low-power consumption SPI (3-wire/4-wire) and I²C interfaces Programmable

Weiss, Gary

486

Hybrid high direct current circuit interrupter  

DOE Patents (OSTI)

A device and a method are disclosed for interrupting very high direct currents (greater than 100,000 amperes) and simultaneously blocking high voltages (greater than 600 volts). The device utilizes a mechanical switch to carry very high currents continuously with low loss and a silicon controlled rectifier (SCR) to bypass the current around the mechanical switch while its contacts are separating. A commutation circuit, connected in parallel with the SCR, turns off the SCR by utilizing a resonant circuit to divert the SCR current after the switch opens. 7 figs.

Rockot, J.H.; Mikesell, H.E.; Jha, K.N.

1998-08-11T23:59:59.000Z

487

Hybrid high direct current circuit interrupter  

DOE Patents (OSTI)

A device and a method for interrupting very high direct currents (greater than 100,000 amperes) and simultaneously blocking high voltages (greater than 600 volts). The device utilizes a mechanical switch to carry very high currents continuously with low loss and a silicon controlled rectifier (SCR) to bypass the current around the mechanical switch while its contacts are separating. A commutation circuit, connected in parallel with the SCR, turns off the SCR by utilizing a resonant circuit to divert the SCR current after the switch opens.

Rockot, Joseph H. (N. Huntingdon, PA); Mikesell, Harvey E. (McMurray, PA); Jha, Kamal N. (Bethel Park, PA)

1998-01-01T23:59:59.000Z

488

Direct electrochemical reduction of metal-oxides  

DOE Patents (OSTI)

A method of controlling the direct electrolytic reduction of a metal oxide or mixtures of metal oxides to the corresponding metal or metals. A non-consumable anode and a cathode and a salt electrolyte with a first reference electrode near the non-consumable anode and a second reference electrode near the cathode are used. Oxygen gas is produced and removed from the cell. The anode potential is compared to the first reference electrode to prevent anode dissolution and gas evolution other than oxygen, and the cathode potential is compared to the second reference electrode to prevent production of reductant metal from ions in the electrolyte.

Redey, Laszlo I. (Downers Grove, IL); Gourishankar, Karthick (Downers Grove, IL)

2003-01-01T23:59:59.000Z

489

Foreign Direct Investment in U.S. Energy 2001  

Gasoline and Diesel Fuel Update (EIA)

Foreign Direct Investment in U.S. Energy 2002 Foreign Direct Investment in U.S. Energy 2002 December 2004 Foreign Direct Investment in U.S. Energy 2002 The purpose of this foreign direct investment report is to provide an assessment of the extent of foreign ownership of energy assets in the United States. Section 657, Subpart 8 of the U.S. Department of Energy Organization Act (Public Law 95-91) requires an annual report to Congress which presents: "a summary of activities in the United States by companies which are foreign owned or controlled and which own or control United States energy sources and supplies ...." EIA intends the information in this report for use by the U.S. Congress, Government agencies, industry analysts, and the general public. Introduction

490

Electric vehicle drive train with direct coupling transmission  

DOE Patents (OSTI)

An electric vehicle drive train includes an electric motor and an associated speed sensor, a transmission operable in a speed reduction mode or a direct coupled mode, and a controller responsive to the speed sensor for operating the transmission in the speed reduction mode when the motor is below a predetermined value, and for operating the motor in the direct coupled mode when the motor speed is above a predetermined value. The controller reduces the speed of the motor, such as by regeneratively braking the motor, when changing from the speed reduction mode to the direct coupled mode. The motor speed may be increased when changing from the direct coupled mode to the speed reduction mode. The transmission is preferably a single stage planetary gearbox.

Tankersley, Jerome B. (Fredericksburg, VA); Boothe, Richard W. (Roanoke, VA); Konrad, Charles E. (Roanoke, VA)

1995-01-01T23:59:59.000Z

491

The combination of digital technology and architectural design to develop a process for enhancing energy-saving: The case of Maanshan China  

Science Journals Connector (OSTI)

Abstract The living standard of Chinese residents greatly improved during China's current economic development. However, residential building energy consumption has also grown quickly. Therefore, it is critical to carry out building energy conservation in residential premises to ensure both building comfort and controlled energy consumption. Digital technology, an effective tool, could help designers complete the energy analysis and optimization in the early planning stage for architectural design. In this paper, authors combine computer aided technology and architectural design to develop a process for optimizing energy conservation in new construction in China and compare features of traditional design methods and digital design methods. We researched the effective functions of digital technology in energy feasibility analysis, natural ventilation and sun-shading, taking the Eco-TECT software as an example. To achieve a better energy-saving effect, the performance-based architectural design method and the integration of Building Information Modeling (BIM) technology and architectural design for energy conservation were advanced through this study as preferable methods for achieving high quality living spaces and energy conservation. This paper analyzes the application of digital technology in building energy conservation, in order to provide the scientific basis for the digital technology application in architectural design and promote the development of building energy-saving in China.

Bao-jie He; Miao Ye; Li Yang; Xiang-Ping Fu; Ben Mou; Charla Griffy-Brown

2014-01-01T23:59:59.000Z

492

Method for enhanced control of welding processes  

DOE Patents (OSTI)

Method and system for producing high quality welds in welding processes, in general, and gas tungsten arc (GTA) welding, in particular by controlling weld penetration. Light emitted from a weld pool is collected from the backside of a workpiece by optical means during welding and transmitted to a digital video camera for further processing, after the emitted light is first passed through a short wavelength pass filter to remove infrared radiation. By filtering out the infrared component of the light emitted from the backside weld pool image, the present invention provides for the accurate determination of the weld pool boundary. Data from the digital camera is fed to an imaging board which focuses on a 100.times.100 pixel portion of the image. The board performs a thresholding operation and provides this information to a digital signal processor to compute the backside weld pool dimensions and area. This information is used by a control system, in a dynamic feedback mode, to automatically adjust appropriate parameters of a welding system, such as the welding current, to control weld penetration and thus, create a uniform weld bead and high quality weld.

Sheaffer, Donald A. (Livermore, CA); Renzi, Ronald F. (Tracy, CA); Tung, David M. (Livermore, CA); Schroder, Kevin (Pleasanton, CA)

2000-01-01T23:59:59.000Z

493

Effect of image quality on calcification detection in digital mammography  

SciTech Connect

Purpose: This study aims to investigate if microcalcification detection varies significantly when mammographic images are acquired using different image qualities, including: different detectors, dose levels, and different image processing algorithms. An additional aim was to determine how the standard European method of measuring image quality using threshold gold thickness measured with a CDMAM phantom and the associated limits in current EU guidelines relate to calcification detection. Methods: One hundred and sixty two normal breast images were acquired on an amorphous selenium direct digital (DR) system. Microcalcification clusters extracted from magnified images of slices of mastectomies were electronically inserted into half of the images. The calcification clusters had a subtle appearance. All images were adjusted using a validated mathematical method to simulate the appearance of images from a computed radiography (CR) imaging system at the same dose, from both systems at half this dose, and from the DR system at quarter this dose. The original 162 images were processed with both Hologic and Agfa (Musica-2) image processing. All other image qualities were processed with Agfa (Musica-2) image processing only. Seven experienced observers marked and rated any identified suspicious regions. Free response operating characteristic (FROC) and ROC analyses were performed on the data. The lesion sensitivity at a nonlesion localization fraction (NLF) of 0.1 was also calculated. Images of the CDMAM mammographic test phantom were acquired using the automatic setting on the DR system. These images were modified to the additional image qualities used in the observer study. The images were analyzed using automated software. In order to assess the relationship between threshold gold thickness and calcification detection a power law was fitted to the data. Results: There was a significant reduction in calcification detection using CR compared with DR: the alternative FROC (AFROC) area decreased from 0.84 to 0.63 and the ROC area decreased from 0.91 to 0.79 (p < 0.0001). This corresponded to a 30% drop in lesion sensitivity at a NLF equal to 0.1. Detection was also sensitive to the dose used. There was no significant difference in detection between the two image processing algorithms used (p > 0.05). It was additionally found that lower threshold gold thickness from CDMAM analysis implied better cluster detection. The measured threshold gold thickness passed the acceptable limit set in the EU standards for all image qualities except half dose CR. However, calcification detection varied significantly between image qualities. This suggests that the current EU guidelines may need revising. Conclusions: Microcalcification detection was found to be sensitive to detector and dose used. Standard measurements of image quality were a good predictor of microcalcification cluster detection.

Warren, Lucy M.; Mackenzie, Alistair; Cooke, Julie; Given-Wilson, Rosalind M.; Wallis, Matthew G.; Chakraborty, Dev P.; Dance, David R.; Bosmans, Hilde; Young, Kenneth C. [National Co-ordinating Centre for the Physics of Mammography, Royal Surrey County Hospital NHS Foundation Trust, Guildford GU2 7XX, United Kingdom and Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH (United Kingdom); Jarvis Breast Screening and Diagnostic Centre, Guildford GU1 1LJ (United Kingdom); Department of Radiology, St. George's Healthcare NHS Trust, Tooting, London SW17 0QT (United Kingdom); Cambridge Breast Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge CB2 0QQ, United Kingdom and NIHR Cambridge Biomedical Research Centre, Cambridge CB2 0QQ (United Kingdom); Department of Radiology, University of Pittsburgh, Pittsburgh, Pennsylvania 15210 (United States); National Co-ordinating Centre for the Physics of Mammography, Royal Surrey County Hospital NHS Foundation Trust, Guildford GU2 7XX, United Kingdom and Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH (United Kingdom); University Hospitals Leuven, Herestraat 49, 3000 Leuven (Belgium); National Co-ordinating Centre for the Physics of Mammography, Royal Surrey County Hospital NHS Foundation Trust, Guildford GU2 7XX, United Kingdom and Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH (United Kingdom)

2012-06-15T23:59:59.000Z

494

Control of External Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

2 Control of External Documents Process 11_0304 Page 1 of 5 2 Control of External Documents Process 11_0304 Page 1 of 5 EOTA - Business Process Document Title: Control of External Documents Process Document Number P-002 Rev 11_0304 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: Q-001, Quality Manual Notify of Changes: EOTA Employees Referenced Document(s): REG-002, External Document Register P-002 Control of External Documents Process 11_0304 Page 2 of 5 Revision History: Rev. Description of Change A Initial Release 11_0304 Changed revision format from alpha character to numbers; modified process to include a step directing addition to REG-002 External Document Register and changed verbiage to clarify and more accurately reflect current process.

495

Material forming apparatus using a directed droplet stream  

DOE Patents (OSTI)

Systems and methods are described for rapidly forming precision metallic and intermetallic alloy net shape parts directly from liquid metal droplets. A directed droplet deposition apparatus includes a crucible with an orifice for producing a jet of material, a jet destabilizer, a charging structure, a deflector system, and an impact zone. The systems and methods provide advantages in that fully dense, microstructurally controlled parts can be fabricated at moderate cost.

Holcomb, David E. (Oak Ridge, TN); Viswanathan, Srinath (Knoxville, TN); Blue, Craig A. (Knoxville, TN); Wilgen, John B. (Oak Ridge, TN)

2000-01-01T23:59:59.000Z

496

A comparison of digital radiography systems in terms of effective detective quantum efficiency  

SciTech Connect

Purpose: The purpose of this study is to compare digital radiography systems using the metric effective detective quantum efficiency (eDQE), which better reflects digital radiography imaging system performance under clinical operating conditions, in comparison with conventional metrics such as modulation transfer function (MTF), normalized noise power spectra (NNPS), and detective quantum efficiency (DQE). Methods: The eDQE was computed by the calculation of the MTF, the NNPS, the phantom attenuation and scatter, and estimation of x-ray flux. The physical characterization of the systems was obtained with the standard beam conditions RQA5 and RQA9, using the PA Chest phantom proposed by AAPM Report no. 31 simulating the attenuation and scatter characteristics of the adult human thorax. The MTF (eMTF) was measured by using an edge test placed at the frontal surface of the phantom, the NNPS (eNNPS) was calculated from images of the phantom acquired at three different exposure levels covering the operating range of the system (E{sub 0}, which is the exposure at which a system is normally operated, 1/3 E{sub 0}, and 3 E0), and scatter measurements were assessed by using a beam-stop technique. The integral of DQE (IDQE) and eDQE (IeDQE) was calculated over the whole spatial frequency range. Results: The eMTF results demonstrate degradation due to magnification and the presence of scattered radiation. The eNNPS was influenced by the grid presence, and in some systems, it contained structured noise. At typical clinical exposure levels, the magnitude of eDQE(0) with respect to DQE(0) at RQA9 beam conditions was 13%, 17%, 16%, 36%, and 24%, respectively, for Carestream DRX-1, Carestream DRX-1C, Carestream Direct View CR975, Philips Digital Diagnost VM, and GE Revolution XR/d. These results were confirmed by the ratio of IeDQE and IDQE in the same conditions. Conclusions: The authors confirm the robustness and reproducibility of the eDQE method. As expected, the DR systems performed better than the CR systems due to their superior signal-to-noise transfer characteristics. The results of this study suggest the eDQE method may provide an opportunity to more accurately assess the clinical performance of digital radiographic imaging systems by accounting for factors such as the presence of scatter, use of an antiscatter grid, and magnification and focal spot blurring effects, which are not reflected in conventional DQE measures.

Bertolini, Marco; Nitrosi, Andrea; Rivetti, Stefano; Lanconelli, Nico; Pattacini, Pierpaolo; Ginocchi, Vladimiro; Iori, Mauro [Department of Advanced Technology, Medical Physics Unit, Azienda Ospedaliera ASMN, Istituto di Ricovero e Cura a Carattere Scientifico, Reggio Emilia 42123 (Italy); Fisica Medica, Ospedale di Sassuolo S.p.A., Modena 41049 (Italy); Alma Mater Studiorum, Physics Department, University of Bologna, Bologna 40127 (Italy); Department of Diagnostic Imaging, Radiology Unit, Azienda Ospedaliera ASMN, Istituto di Ricovero e Cura a Carattere Scientifico, Reggio Emilia 42123 (Italy); Department of Diagnostic Imaging, Radiology Unit, Azienda USL, Reggio Emilia 42122 (Italy); Department of Advanced Technology, Medical Physics Unit, Azienda Ospedaliera ASMN, Istituto di Ricovero e Cura a Carattere Scientifico, Reggio Emilia 42123 (Italy)

2012-05-15T23:59:59.000Z

497

Whole Slide Image Analysis Quantification using Aperio Digital Imaging in a Mouse Lung Metastasis Ronne L. Surface2  

E-Print Network (OSTI)

Whole Slide Image Analysis Quantification using Aperio Digital Imaging in a Mouse Lung Metastasis, Indiana University School of Medicine Digital whole slide imaging is the technique of digitizing a microscope slide at the highest resolution to produce a "digital virtual microscope slide". This digital

Zhou, Yaoqi

498

Office of Nuclear Safety - Directives  

NLE Websites -- All DOE Office Websites (Extended Search)

Nuclear and Facility Safety Directives Nuclear and Facility Safety Directives The HSS Office of Nuclear Safety is the responsible office for the development, interpretation, and revision of the following Department of Energy (DOE) directives. Go to DOE's Directives Web Page to view these directives. DOE Order (O) 252.1A, Technical Standards Program DOE O 252.1A promotes DOE's use of Voluntary Consensus Standards (VCS) as the primary method for application of technical standards and establishes and manages the DOE Technical Standards Program (TSP) including technical standards development, information, activities, issues, and interactions. HS-30 Contact: Jeff Feit DOE Policy (P) 420.1, Department of Energy Nuclear Safety Policy DOE P 420.1, documents the Department's nuclear safety policy to design, construct, operate, and decommission its nuclear facilities in a manner that ensures adequate protection of workers, the public, and the environment.

499

DOE Directives | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE Directives DOE Directives DOE Directives Directives are the Department of Energy's primary means to communicate and institutionalize directives and policies and to establish requirements, responsibilities, and procedures for Departmental elements and contractors. DOE O 413.3A - Program and Project Management for the Acquisition of Capital Assets DOE G 413.3-1 - Managing Design and Construction Using Systems Engineering for Use with DOE O 413.3A DOE G 413.3-2 - Quality Assurance Guide for Project Management DOE G 413.3-3 - Safeguards and Security for Program and Project Management DOE G 413.3-8 - Environmental Management (EM) Cleanup Projects DOE G 413.3-9 - U.S. Department of Energy Project Review Guide for Capital Asset Projects DOE G 413.3-10 - Earned Value Management System (EVMS)

500

Einzel lens chopper and behavior of the chopped beam in the KEK digital accelerator  

Science Journals Connector (OSTI)

The KEK digital accelerator (KEK-DA), which is a small-scale rapid-cycle induction synchrotron (IS), has commenced operation. A permanent magnet x-band electron cyclotron resonance ion source serves as the KEK-DA ion source and delivers various ions. A new Einzel lens beam chopper has been developed to provide the necessary pulse width of a few microseconds. The chopper is implemented by applying a rectangular pulse voltage generated by a solid-state Marx generator to the middle electrode of the Einzel lens. Momentum modulation at the bunch head and tail resulting from chopping in longitudinal direction has been observed. This intrinsic property of the chopped pulse has been clearly observed in a long drift (a free run in the circular ring) in KEK-DA.

K. W. Leo; T. Adachi; T. Arai; K. Takayama

2013-04-17T23:59:59.000Z