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Note: This page contains sample records for the topic "features front wheel" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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1

Robust ASR front-end using spectral-based and discriminant features: experiments on the Aurora tasks  

E-Print Network [OSTI]

Robust ASR front-end using spectral-based and discriminant features: experiments on the Aurora was tested on the set of speech corpora used for the "Aurora" evaluation. Using the feature stream generated and server side ASR processing, a standartization initiative called "Aurora" was initiated within European

Dupont, Stéphane

2

Grinding Wheel System  

DOE Patents [OSTI]

A grinding wheel system includes a grinding wheel with at least one embedded sensor. The system also includes an adapter disk containing electronics that process signals produced by each embedded sensor and that transmits sensor information to a data processing platform for further processing of the transmitted information.

Malkin, Stephen (Amherst, MA); Gao, Robert (Amherst, MA); Guo, Changsheng (South Windsor, CT); Varghese, Biju (Worthington, OH); Pathare, Sumukh (Waltham, MA)

2006-01-10T23:59:59.000Z

3

Grinding Wheel System  

DOE Patents [OSTI]

A grinding wheel system includes a grinding wheel with at least one embedded sensor. The system also includes an adapter disk containing electronics that process signals produced by each embedded sensor and that transmits sensor information to a data processing platform for further processing of the transmitted information.

Malkin, Stephen (Amherst, MA); Gao, Robert (Amherst, MA); Guo, Changsheng (South Windsor, CT); Varghese, Biju (Worthington, OH); Pathare, Sumukh (Waltham, MA)

2003-08-05T23:59:59.000Z

4

Wheeled hopping robot  

DOE Patents [OSTI]

The present invention provides robotic vehicles having wheeled and hopping mobilities that are capable of traversing (e.g. by hopping over) obstacles that are large in size relative to the robot and, are capable of operation in unpredictable terrain over long range. The present invention further provides combustion powered linear actuators, which can include latching mechanisms to facilitate pressurized fueling of the actuators, as can be used to provide wheeled vehicles with a hopping mobility.

Fischer, Gary J. (Albuquerque, NM)

2010-08-17T23:59:59.000Z

5

Automatic Mechetronic Wheel Light Device  

DOE Patents [OSTI]

A wheel lighting device for illuminating a wheel of a vehicle to increase safety and enhance aesthetics. The device produces the appearance of a "ring of light" on a vehicle's wheels as the vehicle moves. The "ring of light" can automatically change in color and/or brightness according to a vehicle's speed, acceleration, jerk, selection of transmission gears, and/or engine speed. The device provides auxiliary indicator lights by producing light in conjunction with a vehicle's turn signals, hazard lights, alarm systems, and etc. The device comprises a combination of mechanical and electronic components and can be placed on the outer or inner surface of a wheel or made integral to a wheel or wheel cover. The device can be configured for all vehicle types, and is electrically powered by a vehicle's electrical system and/or battery.

Khan, Mohammed John Fitzgerald (Silver Spring, MD)

2004-09-14T23:59:59.000Z

6

Wheel-type magnetic refrigerator  

DOE Patents [OSTI]

The disclosure is directed to a wheel-type magnetic refrigerator capable of cooling over a large temperature range. Ferromagnetic or paramagnetic porous materials are layered circumferentially according to their Curie temperature. The innermost layer has the lowest Curie temperature and the outermost layer has the highest Curie temperature. The wheel is rotated through a magnetic field perpendicular to the axis of the wheel and parallel to its direction of rotation. A fluid is pumped through portions of the layers using inner and outer manifolds to achieve refrigeration of a thermal load. 7 figs.

Barclay, J.A.

1983-10-11T23:59:59.000Z

7

Rim seal for turbine wheel  

DOE Patents [OSTI]

A turbine wheel assembly includes a disk having a plurality of blades therearound. A ceramic ring is mounted to the housing of the turbine wheel assembly. A labyrinth rim seal mounted on the disk cooperates with the ceramic ring to seal the hot gases acting on the blades from the disk. The ceramic ring permits a tighter clearance between the labyrinth rim seal and the ceramic ring.

Glezer, Boris (Del Mar, CA); Boyd, Gary L. (Alpine, CA); Norton, Paul F. (San Diego, CA)

1996-01-01T23:59:59.000Z

8

Features  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Region service area. TheEPSCI Home It isGasERPSpun Off FromFeatures

9

Design of an omnidirectional and holonomic wheeled platform prototype  

SciTech Connect (OSTI)

This paper presents the concepts for a new family of wheeled platforms which feature full omnidirectionality with simultaneous and independent rotational and translational motion capabilities. We first describe the original orthogonal-wheels assembly'' on which these platforms are based and discuss how a combination of these assemblies is used to generate an omnidirectional capability. The design and control of a prototype platform developed to test and demonstrate the proposed concepts is then described, and experimental results illustrating the full omnidirectionality of the platform with decoupled rotational and translational degrees of freedom are presented. 15 refs., 9 figs.

Killough, S.M.; Pin, F.G.

1991-01-01T23:59:59.000Z

10

Development of legged, wheeled, and hybrid rover mobility models to facilitate planetary surface exploration mission analysis  

E-Print Network [OSTI]

This work discusses the Mars Surface Exploration (MSE) tool and its adaptation to model rovers featuring legged, wheeled, and hybrid mobility. MSE is a MATLAB based systems engineering tool that is capable of rapidly ...

McCloskey, Scott H. (Scott Haddon)

2007-01-01T23:59:59.000Z

11

By moving the front wheels in and back wheels out, the rover can  

E-Print Network [OSTI]

. Solar arrays Provide power for driving the rover, operating the science instruments, heating. The images provided the sci- entists with their first glimpse of their home away from home -- an area they will study for months. Scientists are thrilled with what they have seen. "Home sweet home," says Steve

Withers, Paul

12

Aerodynamic Drag Reduction Apparatus For Wheeled Vehicles In Ground Effect  

DOE Patents [OSTI]

An apparatus for reducing the aerodynamic drag of a wheeled vehicle in a flowstream, the vehicle having a vehicle body and a wheel assembly supporting the vehicle body. The apparatus includes a baffle assembly adapted to be positioned upstream of the wheel assembly for deflecting airflow away from the wheel assembly so as to reduce the incident pressure on the wheel assembly.

Ortega, Jason M. (Pacifica, CA); Salari, Kambiz (Livermore, CA)

2005-12-13T23:59:59.000Z

13

Bradbury Science Museum - Science on Wheels  

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

Bradbury Science Museum - Science on Wheels Our Mission: To stimulate interest in and enthusiasm for science, technology, engineering and mathematics and promote public...

14

Energy Upgrade California Drives Demand From Behind the Wheel...  

Energy Savers [EERE]

Upgrade California Drives Demand From Behind the Wheel Energy Upgrade California Drives Demand From Behind the Wheel Photo of a trailer with the Energy Upgrade California logo and...

15

CONVERVATION OF ANGULAR MOMENTUM A rotating bicycle wheel has angular  

E-Print Network [OSTI]

CONVERVATION OF ANGULAR MOMENTUM A rotating bicycle wheel has angular momentum, which is a property of a bicycle wheel's mass is concentrated along the wheel's rim, rather than at the center, and this causes. The bicycle wheel, you, and the chair comprise a system that obeys the principle of conservation of angular

16

Qualifying Facility Wheeling Task Force-- Status Report  

E-Print Network [OSTI]

In early 1989, Central Power and Light Company received a request from the Coastal Corporation to wheel power from an affiliate (Coastal Refining) cogeneration facility to 28 remote installations owned by other affiliates. CPL then requested through...

Panjavan, S.

17

In-line drivetrain and four wheel drive work machine using same  

DOE Patents [OSTI]

A four wheel drive articulated mine loader is powered by a fuel cell and propelled by a single electric motor. The drivetrain has the first axle, second axle, and motor arranged in series on the work machine chassis. Torque is carried from the electric motor to the back differential via a pinion meshed with the ring gear of the back differential. A second pinion oriented in an opposite direction away from the ring gear is coupled to a drive shaft to transfer torque from the ring gear to the differential of the front axle. Thus, the ring gear of the back differential acts both to receive torque from the motor and to transfer torque to the forward axle. The in-line drive configuration includes a single electric motor and a single reduction gear to power the four wheel drive mine loader.

Hoff, Brian (East Peoria, IL)

2008-08-05T23:59:59.000Z

18

Dynamics of a Mobile Robot with Three BallWheels  

E-Print Network [OSTI]

Dynamics of a Mobile Robot with Three Ball­Wheels February 17, 1999 Svetlana Ostrovskaya, Raymond J­ wheels. The resulting model turns out to be a Chaplygin system, which allows the dynamic equations connected to one roller of each wheel, and three more actuators con­ trolling the orientation of the ball

Spiteri, Raymond J.

19

Front Burner- Issue 15  

Broader source: Energy.gov [DOE]

The Cybersecurity Front Burner Issue No. 15 addresses the DOE eSCRM Program and Secure Online Shopping.

20

Reconfigurable wheels : re-inventing the wheel for the next generation of planetary rovers  

E-Print Network [OSTI]

Experiences with Spirit and Opportunity, the twin Mars Exploration Rovers, showed that one of the major issues that needs to be addressed in order to expand the exploration capabilities of planetary rovers is that of wheel ...

Baker, Brittany, S.M. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

A magneto-electric quantum wheel  

E-Print Network [OSTI]

Here we show that self-propulsion in quantum vacuum may be achieved by rotating or aggregating magneto-electric nano-particles. The back-action follows from changes in momentum of electro-magnetic zero-point fluctuations, generated in magneto-electric materials. This effect may provide new tools for investigation of the quantum nature of our world. It might also serve in the future as a "quantum wheel" to correct satellite orientation in space.

Alexander Feigel

2009-12-05T23:59:59.000Z

22

Numerical Analysis of the Channel Wheel Fresh Air Ventilator Under Frosting Conditions  

E-Print Network [OSTI]

channel wheel heat exchanger under different ambient conditions using the model developed. These include frost formation on the surface of the channel wheel heat exchanger, and impacts on the operational performance of the channel wheel fresh air...

Gao, B.; Dong, Z.; Cheng, Z.; Luo, E.

2006-01-01T23:59:59.000Z

23

Tip-up and stabilization of an autonomous four-wheeled vehicle  

E-Print Network [OSTI]

An instrumented four-wheeled robot was constructed to investigate steering-induced tip-up and rollover of four-wheeled vehicles, and the possibility of stabilizing and driving while balanced on two wheels. Using an analogy ...

Lan, Justin T

2011-01-01T23:59:59.000Z

24

Simulation and optimization of a two-wheeled, ball- flinging robot  

E-Print Network [OSTI]

the ping-pong ball and the wheel respectively. Location of mc are the radius of the wheel and the ball. m, m b , and msure the ball is caught between the wheels and the body. See

Chen, Po-Ting

2010-01-01T23:59:59.000Z

25

WHEELS: A CONVERSATIONAL SYSTEM IN THE AUTOMOBILE CLASSIFIEDS DOMAIN  

E-Print Network [OSTI]

WHEELS: A CONVERSATIONAL SYSTEM IN THE AUTOMOBILE CLASSIFIEDS DOMAIN Helen Meng, Senis WHEELS is a conversational system which provides access to a database of eletronic automobile classified users to search through a database of 5,000 automobile classifieds. The current end-to-end system can re

26

The design process for wheel-robot integration  

E-Print Network [OSTI]

In this thesis, the design process for wheel-robot integration was documented and reflected on. The project focused on redesigned certain aspects a half-scale wheel-robot to be integrated with a half-scale CityCar prototype ...

Carvajal, Michael Angelo

2009-01-01T23:59:59.000Z

27

Optimal planning and control for hazard avoidance of front-wheel steered ground vehicles  

E-Print Network [OSTI]

Hazard avoidance is an important capability for safe operation of robotic vehicles at high speed. It is also an important consideration for passenger vehicle safety, as thousands are killed each year in passenger vehicle ...

Peters, Steven C. (Steven Conrad)

2012-01-01T23:59:59.000Z

28

QCD and Light-Front Dynamics  

SciTech Connect (OSTI)

AdS/QCD, the correspondence between theories in a dilaton-modified five-dimensional anti-de Sitter space and confining field theories in physical space-time, provides a remarkable semiclassical model for hadron physics. Light-front holography allows hadronic amplitudes in the AdS fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time. The result is a single-variable light-front Schroedinger equation which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. The coordinate z in AdS space is uniquely identified with a Lorentz-invariant coordinate {zeta} which measures the separation of the constituents within a hadron at equal light-front time and determines the off-shell dynamics of the bound state wavefunctions as a function of the invariant mass of the constituents. The hadron eigenstates generally have components with different orbital angular momentum; e.g., the proton eigenstate in AdS/QCD with massless quarks has L = 0 and L = 1 light-front Fock components with equal probability. Higher Fock states with extra quark-anti quark pairs also arise. The soft-wall model also predicts the form of the nonperturbative effective coupling and its {beta}-function. The AdS/QCD model can be systematically improved by using its complete orthonormal solutions to diagonalize the full QCD light-front Hamiltonian or by applying the Lippmann-Schwinger method to systematically include QCD interaction terms. Some novel features of QCD are discussed, including the consequences of confinement for quark and gluon condensates. A method for computing the hadronization of quark and gluon jets at the amplitude level is outlined.

Brodsky, Stanley J.; de Teramond, Guy F.; /SLAC /Southern Denmark U., CP3-Origins /Costa Rica U.

2011-01-10T23:59:59.000Z

29

Characterization of grinding wheels: An annotated Bibliography. Final report  

SciTech Connect (OSTI)

The characteristics of grinding wheels, after both fabrication and periods of operation, have a significant effect on the processed surface and the mechanical properties of advanced ceramics. An extensive literature survey and review has been conducted to determine and catalogue the various characterization methods that have been investigated and reported. Although many of the references have addressed the grinding of metals, the historical and technical merit justify their inclusion in this bibliography. For convenience, the references have been subdivided into nine subheadings: Nondestructive examination; elasticity and stiffness; wheel hardness; topography and profilometry; observation of texture of wheel surfaces wheel wear; in process monitoring of grinding, acoustic emission, other; characteristics of ground surfaces; and miscellaneous.

McClung, R.W.

1995-12-01T23:59:59.000Z

30

FULL FUEL CYCLE ASSESSMENT TANK TO WHEELS EMISSIONS  

E-Print Network [OSTI]

FULL FUEL CYCLE ASSESSMENT TANK TO WHEELS EMISSIONS AND ENERGY CONSUMPTION Prepared For: California to Tank, Criteria Pollutants, Multi-media impacts, EMFAC #12;#12;vii Table of Contents Acknowledgements

31

Light-Front Holographic QCD  

SciTech Connect (OSTI)

The relation between the hadronic short-distance constituent quark and gluon particle limit and the long-range confining domain is yet one of the most challenging aspects of particle physics due to the strong coupling nature of Quantum Chromodynamics, the fundamental theory of the strong interactions. The central question is how one can compute hadronic properties from first principles; i.e., directly from the QCD Lagrangian. The most successful theoretical approach thus far has been to quantize QCD on discrete lattices in Euclidean space-time. Lattice numerical results follow from computation of frame-dependent moments of distributions in Euclidean space and dynamical observables in Minkowski spacetime, such as the time-like hadronic form factors, are not amenable to Euclidean lattice computations. The Dyson-Schwinger methods have led to many important insights, such as the infrared fixed point behavior of the strong coupling constant, but in practice, the analyses are limited to ladder approximation in Landau gauge. Baryon spectroscopy and the excitation dynamics of nucleon resonances encoded in the nucleon transition form factors can provide fundamental insight into the strong-coupling dynamics of QCD. New theoretical tools are thus of primary interest for the interpretation of the results expected at the new mass scale and kinematic regions accessible to the JLab 12 GeV Upgrade Project. The AdS/CFT correspondence between gravity or string theory on a higher-dimensional anti-de Sitter (AdS) space and conformal field theories in physical space-time has led to a semiclassical approximation for strongly-coupled QCD, which provides physical insights into its nonperturbative dynamics. The correspondence is holographic in the sense that it determines a duality between theories in different number of space-time dimensions. This geometric approach leads in fact to a simple analytical and phenomenologically compelling nonperturbative approximation to the full light-front QCD Hamiltonian 'Light-Front Holography'. Light-Front Holography is in fact one of the most remarkable features of the AdS/CFT correspondence. The Hamiltonian equation of motion in the light-front (LF) is frame independent and has a structure similar to eigenmode equations in AdS space. This makes a direct connection of QCD with AdS/CFT methods possible. Remarkably, the AdS equations correspond to the kinetic energy terms of the partons inside a hadron, whereas the interaction terms build confinement and correspond to the truncation of AdS space in an effective dual gravity approximation. One can also study the gauge/gravity duality starting from the bound-state structure of hadrons in QCD quantized in the light-front. The LF Lorentz-invariant Hamiltonian equation for the relativistic bound-state system is P{sub {mu}}P{sup {mu}}|{psi}(P)> = (P{sup +}P{sup -} - P{sub {perpendicular}}{sup 2})|{psi}(P)> = M{sup 2}|{psi}(P)>, P{sup {+-}} = P{sup 0} {+-} P{sup 3}, where the LF time evolution operator P{sup -} is determined canonically from the QCD Lagrangian. To a first semiclassical approximation, where quantum loops and quark masses are not included, this leads to a LF Hamiltonian equation which describes the bound-state dynamics of light hadrons in terms of an invariant impact variable {zeta} which measures the separation of the partons within the hadron at equal light-front time {tau} = x{sup 0} + x{sup 3}. This allows us to identify the holographic variable z in AdS space with an impact variable {zeta}. The resulting Lorentz-invariant Schroedinger equation for general spin incorporates color confinement and is systematically improvable. Light-front holographic methods were originally introduced by matching the electromagnetic current matrix elements in AdS space with the corresponding expression using LF theory in physical space time. It was also shown that one obtains identical holographic mapping using the matrix elements of the energy-momentum tensor by perturbing the AdS metric around its static solution. A gravity dual to QCD is not known, but th

Brodsky, Stanley J.; /SLAC /Southern Denmark U., CP3-Origins; de Teramond, Guy F.; /Costa Rica U.

2012-02-16T23:59:59.000Z

32

Safety First Safety AlwaysSafety Last Using abrasive wheel equipment exposes you to many  

E-Print Network [OSTI]

Safety First Safety AlwaysSafety Last Using abrasive wheel equipment exposes you to many potential and strength and meet all manufacturer specifications. Abrasive Wheel Machinery and Tools Safety Tip #1

Minnesota, University of

33

Well-to-Wheels Energy Use and Greenhouse Gas Emissions of Plug...  

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

Well-to-Wheels Energy Use and Greenhouse Gas Emissions of Plug-In Hybrid Electric Vehicles Well-to-Wheels Energy Use and Greenhouse Gas Emissions of Plug-In Hybrid Electric...

34

E-Print Network 3.0 - atlas big wheel Sample Search Results  

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

wheel Search Powered by Explorit Topic List Advanced Search Sample search results for: atlas big wheel Page: << < 1 2 3 4 5 > >> 1 A Slip Model for the Spherical Actuation of the...

35

Well-to-Wheels Analysis of Advanced Fuel/Vehicle Systems - A...  

Energy Savers [EERE]

Well-to-Wheels Analysis of Advanced FuelVehicle Systems - A North American Study of Energy Use, Greenhouse Gas Emissions, and Criteria Pollutant Emissions Well-to-Wheels Analysis...

36

KINEMATIC CONTROL OF A NONHOLONOMIC WHEELED MOBILE MANIPULATOR A DIFFERENTIAL FLATNESS APPROACH  

E-Print Network [OSTI]

the terminal conditions in the flat output space while control design reduces to a pole-placement problem) electro-mechanical testing. NOMENCLATURE WMR Wheeled Mobile Robot WMM Wheeled Mobile Manipulator ( ),x y Cartesian coordinates of the center of the wheel axle of the WMR Orientation of the WMR with respect

Krovi, Venkat

37

Quasi-Static Analysis of a Leg-Wheel Hybrid Vehicle for Enhancing Stair Climbing Ability  

E-Print Network [OSTI]

Quasi-Static Analysis of a Leg-Wheel Hybrid Vehicle for Enhancing Stair Climbing Ability Pattaramon}@kmutt.ac.th stl@kmitnb.ac.th Abstract - This paper presents quasi-static analysis of a leg- wheel hybrid vehicle. Index Terms - Leg-Wheel hybrid vehicle, Stair climbing ability, Quasi-static analysis I. INTRODUCTION

Laksanacharoen, Sathaporn

38

Electric Power Controller for Steering Wheel Management in Electric Cars  

E-Print Network [OSTI]

Electric Power Controller for Steering Wheel Management in Electric Cars Vicente Milanés, Joshué-- Autonomous vehicles, Power control, System analysis and design, Intelligent transportation systems. I they are named hydraulic power steering (HPS) systems. If an electric motor is used then they are named electric

Paris-Sud XI, Université de

39

Hydrodynamic Tesla Wheel Flume for Model and Prototype Testing  

E-Print Network [OSTI]

The Tesla turbine, U.S. Patent 1,061,206 -- May 6, 1913 was invented by Nikola Tesla as a means to extractHydrodynamic Tesla Wheel Flume for Model and Prototype Testing Spencer Jenkins, Chris Scott, Jacob Engineering department at Florida Institute of Technology (Florida Tech) has developed a Hydrodynamic Tesla

Wood, Stephen L.

40

FULL FUEL CYCLE ASSESSMENT WELL TO WHEELS ENERGY INPUTS,  

E-Print Network [OSTI]

FULL FUEL CYCLE ASSESSMENT WELL TO WHEELS ENERGY INPUTS, EMISSIONS, AND WATER IMPACTS Preparation for the AB 1007 (Pavley) Alternative Transportation Fuels Plan Proceeding Prepared For: California Energy, Project Manager Ray Tuvell, Manager EMERGING FUELS & TECHNOLOGY OFFICE Rosella Shapiro, Deputy Director

Note: This page contains sample records for the topic "features front wheel" 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

Multistage axial-flux PM machine for wheel direct drive  

SciTech Connect (OSTI)

The design of direct-drive wheel motors must comply with diameter restriction due to housing the motor in a wheel rim and allow the achievement of very high torque density and overload capability. Slotless axial-flux permanent magnet machines (AFPMs) prove to be the best candidate for application in electric vehicles as direct-drive wheel motors, as in comparison with conventional machines they allow designs with higher compactness, lightness and efficiency. The paper presents a newly conceived AFPM which has a multistage structure and a water-cooled ironless stator. In the proposed new topology of the machine the space formerly occupied by the toroidal core becomes a water duct, which removes heat directly from the interior surface of the stator winding. The high efficiency of the machine cooling arrangement allows long-term 100% overload operation and great reduction of the machine weight. The multistage structure of the machine is suited to overcome the restriction on the machine diameter and meet the torque required at the wheel shaft. The paper gives guidelines for the design of a multistage AFPM with water-cooled ironless stator, and describes characteristics of a two-stage prototype machine rated 215 N{center_dot}m, 1,100 r/min.

Caricchi, F.; Crescimbini, F.; Mezzetti, F.; Santini, E. [Univ. of Rome La Sapienza (Italy). Dept. of Electrical Engineering] [Univ. of Rome La Sapienza (Italy). Dept. of Electrical Engineering

1996-07-01T23:59:59.000Z

42

Innovative grinding wheel design for cost-effective machining of advanced ceramics  

SciTech Connect (OSTI)

This Final Report covers the Phase II Innovative Grinding Wheel (IGW) program in which Norton Company successfully developed a novel grinding wheel for cost-effective cylindrical grinding of advanced ceramics. In 1995, Norton Company successfully completed the 16-month Phase I technical effort to define requirements, design, develop, and evaluate a next-generation grinding wheel for cost-effective cylindrical grinding of advanced ceramics using small prototype wheels. The Phase II program was initiated to scale-up the new superabrasive wheel specification to larger diameters, 305-mm to 406-mm, required for most production grinding of cylindrical ceramic parts, and to perform in-house and independent validation grinding tests.

Licht, R.H.; Kuo, P.; Liu, S.; Murphy, D.; Picone, J.W.; Ramanath, S.

2000-05-01T23:59:59.000Z

43

Front Burner - Issue 18 | Department of Energy  

Energy Savers [EERE]

Front Burner - Issue 18 Front Burner - Issue 18 The Cybersecurity Front Burner Issue No. 18 addresses keeping kids safe on the Internet, cyber crime, and DOE Cyber awareness and...

44

Innovative grinding wheel design for cost-effective machining of advanced ceramics. Phase I, final report  

SciTech Connect (OSTI)

Norton Company successfully completed the 16-month Phase I technical effort to define requirements, design, develop, and evaluate a next-generation grinding wheel for cost-effective cylindrical grinding of advanced ceramics. This program was a cooperative effort involving three Norton groups representing a superabrasive grinding wheel manufacturer, a diamond film manufacturing division and a ceramic research center. The program was divided into two technical tasks, Task 1, Analysis of Required Grinding Wheel Characteristics, and Task 2, Design and Prototype Development. In Task 1 we performed a parallel path approach with Superabrasive metal-bond development and the higher technical risk, CVD diamond wheel development. For the Superabrasive approach, Task 1 included bond wear and strength tests to engineer bond-wear characteristics. This task culminated in a small-wheel screening test plunge grinding sialon disks. In Task 2, an improved Superabrasive metal-bond specification for low-cost machining of ceramics in external cylindrical grinding mode was identified. The experimental wheel successfully ground three types of advanced ceramics without the need for wheel dressing. The spindle power consumed by this wheel during test grinding of NC-520 sialon is as much as to 30% lower compared to a standard resin bonded wheel with 100 diamond concentration. The wheel wear with this improved metal bond was an order of magnitude lower than the resin-bonded wheel, which would significantly reduce ceramic grinding costs through fewer wheel changes for retruing and replacements. Evaluation of ceramic specimens from both Tasks 1 and 2 tests for all three ceramic materials did not show evidence of unusual grinding damage. The novel CVD-diamond-wheel approach was incorporated in this program as part of Task 1. The important factors affecting the grinding performance of diamond wheels made by CVD coating preforms were determined.

Licht, R.H.; Ramanath, S.; Simpson, M.; Lilley, E.

1996-02-01T23:59:59.000Z

45

Front Burner - Issue 13 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

3 Front Burner - Issue 13 The Cybersecurity Front Burner Issue No. 13 contained a message from the Associate Chief Information Officer (ACIO) for Cybersecurity informing readers...

46

Front Burner - Issue 14 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

4 Front Burner - Issue 14 The Cybersecurity Front Burner Issue No. 14 addresses the 2013 National Cybersecurity Awareness Month (NCSAM) Campaign and Phishing Scams. Cybersecurity...

47

Hydrogen Pathways: Cost, Well-to-Wheels Energy Use, and Emissions...  

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

Well-to-Wheels Energy Use, and Emissions for the Current Technology Status of Seven Hydrogen Production, Delivery, and Distribution Scenarios Hydrogen Pathways: Cost,...

48

Hybrid Control of a Two-Wheeled Automatic-Balancing Robot with Backlash Feature  

E-Print Network [OSTI]

Department of Energy Technology Aalborg University, Esbjerg Campus Niels Bohrs Vej 8, 6700 Esbjerg, Denmark Email: ploehn08@student.aau.dk Zhenyu Yang Department of Energy Technology Aalborg University, Esbjerg

Yang, Zhenyu

49

Light-Front Holography, Light-Front Wavefunctions, and Novel QCD Phenomena  

SciTech Connect (OSTI)

Light-Front Holography is one of the most remarkable features of the AdS/CFT correspondence. In spite of its present limitations it provides important physical insights into the nonperturbative regime of QCD and its transition to the perturbative domain. This novel framework allows hadronic amplitudes in a higher dimensional anti-de Sitter (AdS) space to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time. The model leads to an effective confining light-front QCD Hamiltonian and a single-variable light-front Schroedinger equation which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. The coordinate z in AdS space is uniquely identified with a Lorentz-invariant coordinate {zeta} which measures the separation of the constituents within a hadron at equal light-front time and determines the off-shell dynamics of the bound-state wavefunctions, and thus the fall-off as a function of the invariant mass of the constituents. The soft-wall holographic model modified by a positive-sign dilaton metric, leads to a remarkable one-parameter description of nonperturbative hadron dynamics - a semi-classical frame-independent first approximation to the spectra and light-front wavefunctions of meson and baryons. The model predicts a Regge spectrum of linear trajectories with the same slope in the leading orbital angular momentum L of hadrons and the radial quantum number n. The hadron eigensolutions projected on the free Fock basis provides the complete set of valence and non-valence light-front Fock state wavefunctions {Psi}{sub n/H} (x{sub i}, k{sub {perpendicular}i}, {lambda}{sub i}) which describe the hadron's momentum and spin distributions needed to compute the direct measures of hadron structure at the quark and gluon level, such as elastic and transition form factors, distribution amplitudes, structure functions, generalized parton distributions and transverse momentum distributions. The effective confining potential also creates quark-antiquark pairs from the amplitude q {yields} q{bar q}q. Thus in holographic QCD higher Fock states can have any number of extra q{bar q} pairs. We discuss the relevance of higher Fock-states for describing the detailed structure of space and time-like form factors. The AdS/QCD model can be systematically improved by using its complete orthonormal solutions to diagonalize the full QCD light-front Hamiltonian or by applying the Lippmann-Schwinger method in order to systematically include the QCD interaction terms. A new perspective on quark and gluon condensates is also obtained.

Brodsky, Stanley J.; /SLAC /Southern Denmark U., CP3-Origins; de Teramond, Guy F.; /Costa Rica U.

2012-02-16T23:59:59.000Z

50

Functional test procedure, Fifth Wheel: SS-R42351, Issue D  

SciTech Connect (OSTI)

This report describes the equipment required for initial assembly/maintenance and inspection/resetting of the Fifth Wheel system. It also gives a step-by-step procedure for initial assembly/maintenance inspection and procedures for resetting the system and Eager-Pac installation. The Fifth Wheel system is associated with a tractor-type vehicle used for materials handling.

NONE

1994-07-12T23:59:59.000Z

51

Flexible, Wide-Area Storage for Distributed Systems with WheelFS  

E-Print Network [OSTI]

WheelFS is a wide-area distributed storage system intended to help multi-site applications share data and gain fault tolerance. WheelFS takes the form of a distributed file system with a familiar POSIX interface. Its design ...

Stribling, Jeremy

52

Billiards Digest June, 2012 "VEPP Part III: Wagon Wheel Drills" ILLUSTRATED PRINCIPLES  

E-Print Network [OSTI]

Control and English." "Wagon wheel" drills are very useful to help you practice and develop cue ball (CB angle slightly for each ball. There is actually a system you can use to help decide where to placeBilliards Digest June, 2012 "VEPP ­ Part III: Wagon Wheel Drills" ILLUSTRATED PRINCIPLES David

Alciatore, David G.

53

Trajectory Planning and Control of an Underactuated Dynamically Stable Single Spherical Wheeled Mobile Robot  

E-Print Network [OSTI]

Trajectory Planning and Control of an Underactuated Dynamically Stable Single Spherical Wheeled is a dynamically stable mobile robot that moves on a single spherical wheel and is capable of omni- directional movement. The ballbot is an underactuated system with nonholonomic dynamic constraints. The authors propose

54

Modeling Dynamics and Exploring Control of a Single-Wheeled Dynamically Stable Mobile  

E-Print Network [OSTI]

Modeling Dynamics and Exploring Control of a Single-Wheeled Dynamically Stable Mobile Robot. It actively balances and moves on a single wheel using closed loop feedback, making it dynamically stable it a good candidate for operating in human environments. Balancing on a ball allows Ballbot to be omni

55

Magnesium Front End Design and Development  

Broader source: Energy.gov (indexed) [DOE]

by: Alan A. Luo and R. C. McCune Presented by: James Quinn, General Motors Unibody Architecture 3-piece Mg front end (bodyframe) USAMP AMD 603 - Magnesium Front End Design and...

56

Front Burner - Issue 16 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

6 Front Burner - Issue 16 The Cybersecurity Front Burner Issue No. 16 addresses Malware, the Worst Passwords of 2013, and the Flat Stanley and Stop.Think.Connect. Campaign....

57

Rotor bore and turbine rotor wheel/spacer heat exchange flow circuit  

DOE Patents [OSTI]

In a turbine having closed-circuit steam-cooling passages about the rim of the rotor during steady-state operation, compressor discharge air is supplied to the rotor bore for passage radially outwardly into the wheel space cavities between the wheels and spacers. Communicating slots and channels in the spacers and wheels at circumferentially spaced positions enable egress of the compressor discharge air into the hot gas flow path. At turbine startup, cooling air flows through the closed-circuit steam passages to cool the outer rim of the rotor while compressor discharge air pre-warms the wheels and spacers. At steady-state, cooling steam is supplied in the closed-circuit steam-cooling passages and compressor discharge air is supplied through the bore and into the wheel space cavities to cool the rotor.

Caruso, Philip M. (Selkirk, NY); Eldrid, Sacheverel Quentin (Saratoga Springs, NY); Ladhani, Azad A. (Niskayuna, NY); DeMania, Alan Richard (Niskayuna, NY); Palmer, Gene David (Clifton Park, NY); Wilson, Ian David (Clifton Park, NY); Rathbun, Lisa Shirley (Scotia, NY); Akin, Robert Craig (Schenectady, NY)

2002-01-01T23:59:59.000Z

58

Light-Front Holographic QCD and Emerging Confinement  

E-Print Network [OSTI]

In this report we explore the remarkable connections between light-front dynamics, its holographic mapping to gravity in a higher-dimensional anti-de Sitter (AdS) space, and conformal quantum mechanics. This approach provides new insights into the origin of a fundamental mass scale and the physics underlying confinement dynamics in QCD in the limit of massless quarks. The result is a relativistic light-front wave equation for arbitrary spin with an effective confinement potential derived from a conformal action and its embedding in AdS space. This equation allows for the computation of essential features of hadron spectra in terms of a single scale. The light-front holographic methods described here gives a precise interpretation of holographic variables and quantities in AdS in terms of light-front variables and quantum numbers. This leads to a relation between the AdS wave functions and the boost-invariant light-front wave functions describing the internal structure of hadronic bound states in physical space-time. The pion is massless in the chiral limit and the excitation spectra of relativistic light-quark meson and baryon bound states lie on linear Regge trajectories with identical slopes in the radial and orbital quantum numbers. In the light-front holographic approach described here currents are expressed as an infinite sum of poles, and form factors as a product of poles. At large $q^2$ the form factor incorporates the correct power-law fall-off for hard scattering independent of the specific dynamics and is dictated by the twist. At low $q^2$ the form factor leads to vector dominance. The approach is also extended to include small quark masses. We briefly review in this report other holographic approaches to QCD, in particular top-down and bottom-up models based on chiral symmetry breaking. We also include a discussion of open problems and future applications.

Stanley J. Brodsky; Guy F. de Teramond; Hans Gunter Dosch; Joshua Erlich

2015-02-13T23:59:59.000Z

59

A CASTOR WHEEL CONTROLLER FOR DIFFERENTIAL DRIVE WHEELCHAIRS  

E-Print Network [OSTI]

on the front axis), and the tire material (rubber), the addi- tional force to change the angle of the castor by the equipped laser scanners and brakes in time if an obstacle is danger- ously close to the wheelchair. During for different grounds and tire materials, but without a projection of these forces to the differential drive

Bremen, Universitt

60

Apparatus and methods for aligning holes through wheels and spacers and stacking the wheels and spacers to form a turbine rotor  

DOE Patents [OSTI]

A gas turbine rotor stacking fixture includes upstanding bolts for reception in aligned bolt holes in superposed aft disk, wheels and spacers and upstanding alignment rods received in openings of the disk, wheels and spacers during the rotor stacking assembly. The axially registering openings enable insertion of thin-walled tubes circumferentially about the rim of the rotor, with tight tolerances to the openings to provide supply and return steam for cooling buckets. The alignment rods have radial dimensions substantially less than their dimensions in a circumferential direction to allow for radial opening misalignment due to thermal expansion, tolerance stack-up and wheel-to-spacer mismatch due to rabbet mechanical growth. The circumferential dimension of the alignment rods affords tightly toleranced alignment of the openings through which the cooling tubes are installed.

Berry, Robert Randolph (Greenville, SC); Palmer, Gene David (Clifton Park, NY); Wilson, Ian David (Clifton Park, NY)

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

Just build it! : a fully functional concept vehicle using robotic wheels  

E-Print Network [OSTI]

Interest in electric vehicle drive units is resurging with the proliferation of hybrid and electric vehicles. Currently emerging key-technologies are: in-wheel motors, electric braking, integrated steering activators and ...

Schmitt, Peter, S.M. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

62

Flame front geometry in premixed turbulent flames  

SciTech Connect (OSTI)

Experimental and numerical determinations of flame front curvature and orientation in premixed turbulent flames are presented. The experimental data is obtained from planar, cross sectional images of stagnation point flames at high Damkoehler number. A direct numerical simulation of a constant energy flow is combined with a zero-thickness, constant density flame model to provide the numerical results. The computational domain is a 32{sup 3} cube with periodic boundary conditions. The two-dimensional curvature distributions of the experiments and numerical simulations compare well at similar q{prime}/S{sub L} values with means close to zero and marked negative skewness. At higher turbulence levels the simulations show that the distributions become symmetric about zero. These features are also found in the three dimensional distributions of curvature. The simulations support assumptions which make it possible to determine the mean direction cosines from the experimental data. This leads to a reduction of 12% in the estimated flame surface area density in the middle of the flame brush. 18 refs.

Shepherd, I.G. (Lawrence Berkeley Lab., CA (United States)); Ashurst, W.T. (Sandia National Labs., Livermore, CA (United States))

1991-12-01T23:59:59.000Z

63

Light-Front Holography, AdS/QCD, and Hadronic Phenomena  

SciTech Connect (OSTI)

AdS/QCD, the correspondence between theories in a modified five-dimensional anti-de Sitter space and confining field theories in physical space-time, provides a remarkable semiclassical model for hadron physics. Light-front holography allows hadronic amplitudes in the AdS fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time, thus providing a relativistic description of hadrons at the amplitude level. We identify the AdS coordinate z with an invariant light-front coordinate {zeta} which separates the dynamics of quark and gluon binding from the kinematics of constituent spin and internal orbital angular momentum. The result is a single-variable light-front Schroedinger equation with a confining potential which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. The mapping of electromagnetic and gravitational form factors in AdS space to their corresponding expressions in light-front theory confirms this correspondence. Some novel features of QCD are discussed, including the consequences of confinement for quark and gluon condensates. The distinction between static structure functions, such as the probability distributions computed from the square of the light-front wavefunctions, versus dynamical structure functions which include the effects of rescattering, is emphasized. A new method for computing the hadronization of quark and gluon jets at the amplitude level, an event amplitude generator, is outlined.

Brodsky, Stanley J.; /SLAC; de Teramond, Guy F.; /Costa Rica U.

2009-12-09T23:59:59.000Z

64

Light front Casimir effect at finite temperature  

E-Print Network [OSTI]

The correct description of the standard Casimir effect for periodic boundary conditions via light front formalism implies in these conditions imposed at fixed Minkowski times [Almeida {\\it et al.} Phys. Rev. {\\bf D 87}, 065028 (2013); Chabysheva and Hiller, Phys. Rev. {\\bf D 88}, 085006 (2013)] instead of fixed light front times. The unphysical nature of this latter condition is manifested in the vacuum part by no regularization yielding a finite Casimir energy density [Lenz and Steinbacher, Phys. Rev. {\\bf D 67}, 045010 (2003)]. In the present paper, we extend this discussion and analyze the problem of the light front quantization with simultaneous presence of a thermal bath and boundary conditions. Considering both the oblique light front as well as Dirac light front coordinates, we show that the imposition of periodic boundary conditions at fixed Minkowski times recovers the expected behaviors for the energy density and Casimir entropy. We also investigate how the unphysical nature of the periodic boundary...

Rodrigues, P L M; Alves, Danilo T; Alves, Van Srgio; Silva, Charles R

2015-01-01T23:59:59.000Z

65

December 2012 Featured articles  

E-Print Network [OSTI]

Colleagues, Over the last five years AP staff system-wide have spent a great deal of time and energy ad the fall it was an exciting end to the foot- ball season as we prevailed over our cross-state rivals waiting for a response rest assured that the wheels are turning to get you answers. I will be summarizing

Collins, Gary S.

66

Submitted to EUROSPEECH 2003, September 1-4, 2003 -Geneva, Switzerland Enhancement of Noisy Speech for Noise Robust Front-End and Speech  

E-Print Network [OSTI]

Submitted to EUROSPEECH 2003, September 1-4, 2003 - Geneva, Switzerland Enhancement of Noisy Speech enhancement method for noise ro- bust front-end and speech reconstruction at the back-end of Dis- tributed. 2. Noise robust front-end algorithm The speech enhancement methods in combination with feature

Wichmann, Felix

67

Pressure transient method for front tracking  

SciTech Connect (OSTI)

A pressure transient technique for tracking the advance of cold water fronts during water flooding and goethermal injection operations has been developed. The technique is based on the concept that the steady state pressure buildup in the reservoir region inside the front can be calculated by a fluid skin factor. By analyzing successive pressure falloff tests, the advance of the front in the reservoir can be monitored. The validity of the methods is demonstrated by application to three numerically simulated data sets, a nonisothermal step-rate injection test, a series of pressure falloffs in a multilayered reservoir, and a series of pressure falloff tests in a water flooded oil reservoir.

Benson, S.M.; Bodvarsson, G.S.

1983-08-01T23:59:59.000Z

68

ARM - Features  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformation InExplosionAnnouncements Media ContactCenterFeature Stories

69

Strings in plane-fronted gravitational waves  

E-Print Network [OSTI]

Brinkmann's plane-fronted gravitational waves with parallel rays --~shortly pp-waves~-- are shown to provide, under suitable conditions, exact string vacua at all orders of the sigma-model perturbation expansion.

C. Duval; Z. Horvath; P. A. Horvathy

2006-02-13T23:59:59.000Z

70

Optimal Power Flow Formulation in Market of Retail Wheeling Taiyou Yong, Student Member, IEEE Robert Lasseter, Fellow, IEEE  

E-Print Network [OSTI]

power plants, nuclear power plants etc and selling power to consumers. The suppliers have contractsOptimal Power Flow Formulation in Market of Retail Wheeling Taiyou Yong, Student Member, IEEE at Madison, Madison, Wisconsin, USA Abstract: Power system deregulation along with retail wheeling

71

A Dual Model-Free Control of Underactuated Mechanical Systems, Application to The Inertia Wheel Inverted Pendulum  

E-Print Network [OSTI]

A Dual Model-Free Control of Underactuated Mechanical Systems, Application to The Inertia Wheel underac- tuated mechanical system: the inertia wheel inverted pendulum. Numerical simulations as well: the ball and beam [9] (where the dynamics of the beam has not been taken into account) and the Planar

Paris-Sud XI, Université de

72

Light front Casimir effect at finite temperature  

E-Print Network [OSTI]

The correct description of the standard Casimir effect for periodic boundary conditions via light front formalism implies in these conditions imposed at fixed Minkowski times [Almeida {\\it et al.} Phys. Rev. {\\bf D 87}, 065028 (2013); Chabysheva and Hiller, Phys. Rev. {\\bf D 88}, 085006 (2013)] instead of fixed light front times. The unphysical nature of this latter condition is manifested in the vacuum part by no regularization yielding a finite Casimir energy density [Lenz and Steinbacher, Phys. Rev. {\\bf D 67}, 045010 (2003)]. In the present paper, we extend this discussion and analyze the problem of the light front quantization with simultaneous presence of a thermal bath and boundary conditions. Considering both the oblique light front as well as Dirac light front coordinates, we show that the imposition of periodic boundary conditions at fixed Minkowski times recovers the expected behaviors for the energy density and Casimir entropy. We also investigate how the unphysical nature of the periodic boundary conditions imposed at fixed light front times manifests in the thermal part of the energy and entropy, showing that in the classical limit the Casimir entropy decreases linearly with the temperature (not becoming independent of the temperature as expected), and also that the Kirchhoff theorem is not respected.

P. L. M. Rodrigues; Silvana Perez; Danilo T. Alves; Van Srgio Alves; Charles R. Silva

2015-01-06T23:59:59.000Z

73

ION 2006, Fort Worth TX, 26-29 September 2006 1 GPS/INS/G Sensors/Yaw Rate Sensor/Wheel  

E-Print Network [OSTI]

of four integration strategies, namely a GPS/INS integrated system, a GPS/INS/G sensors/Yaw rate sensor/Wheel speed sensor system with two non- holonomic constraints, a GPS/INS/G sensors/Yaw rate sensor/Wheel speed/INS/G sensors/Yaw rate sensor/Wheel speed sensor system with the removal of the lateral constraint

Calgary, University of

74

Dynamic Modeling of a Two Wheeled Vehicle : Jourdain Formalism  

E-Print Network [OSTI]

This paper presents a motorcycle direct dynamic formulation by the Jourdain's principle approach on the motorcycle's handlebar. Simulation results reveal some dynamics features like load transfer and counter-steering phenomena. keywords Motorcycle modeling, motorcycle control, Jourdain's dynamics principle. 1 Introduction

Paris-Sud XI, Université de

75

Isoperimetric inequalities for wave fronts and a generalization of Menzin's conjecture for bicycle monodromy on surfaces of constant curvature  

E-Print Network [OSTI]

We prove generalizations of the isoperimetric inequality for both spherical and hyperbolic wave fronts (i.e. piecewise smooth curves which may have cusps). We then discuss "bicycle curves" using the generalized isoperimetric inequalities. The euclidean model of a bicycle is a unit segment AB that can move so that it remains tangent to the trajectory of point A (the rear wheel is fixed on the bicycle frame). We extend this definition to a general Riemannian manifold, and concern ourselves in particular with bicycle curves in the hyperbolic plane H^2 and on the sphere S^2. We prove results along the lines of those proven by Levi and Tabachnikov and resolve both spherical and hyperbolic versions of Menzin's conjecture, which relates the area bounded by a curve to its associated monodromy map.

Howe, Sean; Zakharevich, Valentin

2009-01-01T23:59:59.000Z

76

ENERGY-BASED LIMIT CYCLE COMPENSATION FOR DYNAMICALLY BALANCING WHEELED INVERTED PENDULUM MACHINES  

E-Print Network [OSTI]

ENERGY-BASED LIMIT CYCLE COMPENSATION FOR DYNAMICALLY BALANCING WHEELED INVERTED PENDULUM MACHINES are not well known. The effects of these non-linearities can be observed in the energy behavior of IP balancing. While in this paper we use an energy-based observer to detect and correct limit cycles while balancing

Dollar, Aaron M.

77

A FINITE ELEMENT APPROACH FOR SIMULATING THE QUENCHING OF LARGE ALUMINIUM COMPRESSOR WHEELS  

E-Print Network [OSTI]

stresses which result from high temperature gradients. This may influence successive machining steps due as shown in Figure 1. A wheel is made out of one massive billet and is quenched in hot water. A 3D-FE model is challenging due to a variety of reasons, such as requiring material data for large temperature range as well

78

Operations with the new FUSE observatory: three-axis control with one reaction wheel  

E-Print Network [OSTI]

control system, particularly those of gyroscopes and reaction wheels, have made science operations in all three axes. Jitter values of no more than ±1 arcsecond in pitch, ±10 arcsecond in yaw, and ±1-516-8503; fax 410-516-5494; http://fuse.pha.jhu.edu #12;The FUSE Attitude Control System (ACS) contains two sets

79

ATLAS MOTION PLATFORM MECANUM WHEEL JACOBIAN IN THE VELOCITY AND STATIC FORCE DOMAINS  

E-Print Network [OSTI]

ATLAS MOTION PLATFORM MECANUM WHEEL JACOBIAN IN THE VELOCITY AND STATIC FORCE DOMAINS Jonathan J applications. Atlas is a six degree of freedom vehicle op- erating training simulator motion platform where and static force Jacobians; normal forces. JACOBIAN DES ROUES MECANUM DU PLATFORME DE MOTION ATLAS DANS LES

Hayes, John

80

ATLAS MOTION PLATFORM MECANUM WHEEL JACOBIAN IN THE VELOCITY AND STATIC FORCE DOMAINS  

E-Print Network [OSTI]

ATLAS MOTION PLATFORM MECANUM WHEEL JACOBIAN IN THE VELOCITY AND STATIC FORCE DOMAINS Jonathan J. Atlas is a six degree of freedom vehicle op- erating training simulator motion platform where orienting force Jacobians; normal forces. MATRICE JACOBIENNE DES ROUES MECANUM SIMULATOUR DE MOUVEMENT ATLAS DANS

Hayes, John

Note: This page contains sample records for the topic "features front wheel" 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

Cooperation of Heterogeneous, Autonomous Robots: A Case Study of Humanoid and Wheeled Robots  

E-Print Network [OSTI]

. I. INTRO With the growing importance of autonomous mobile robots in industrial and researchCooperation of Heterogeneous, Autonomous Robots: A Case Study of Humanoid and Wheeled Robots Jutta- ation of a strongly heterogeneous robot team, composed of a highly articulated humanoid robot

Stryk, Oskar von

82

Model-based analysis and simulation of regenerative heat wheel Zhuang Wu a  

E-Print Network [OSTI]

comfort and saving thermal energy [1]. It is often considered as one of the dominant elements of low energy residential buildings in cold winter regions [2]. Estimates show that as much as 70% of the energy The rotary regenerator (also called the heat wheel) is an important component of energy intensive sectors

Melnik, Roderick

83

Rediscovering the Wheel. Thermochemical Analysis of Energetics of the Aromatic Diazines  

E-Print Network [OSTI]

calorimetry and vapor pressure measurements. The gas and condensed phase enthalpies of formation of the parent not the case for diazabenzenes. The previous comprehensive experimental study of both the condensed and gasRediscovering the Wheel. Thermochemical Analysis of Energetics of the Aromatic Diazines Sergey P

Chickos, James S.

84

Multi-stage axial-flux PM machine for wheel direct drive  

SciTech Connect (OSTI)

The design of direct-driven wheel motors must comply with diameter restriction due to housing the motor in a wheel rim and allow the achievement of very high torque density and overload capability. Slotless axial-flux permanent magnet machines (AFPMs) prove to be one best candidate for application in electric vehicles as direct-drive wheel motors, as in comparison with conventional machines they allow designs with higher compactness, lightness and efficiency. The paper presents a newly-conceived AFPM which has multi-stage structure and water-cooled ironless stator. In the proposed new topology of the machine the space formerly occupied by the toroidal core becomes a water duct, which removes heat directly from the interior surface of the stator winding. The high efficiency of the machine cooling arrangement allows long-term 100% overload operation and great reduction of the machine weight. The multistage structure of the machine is suited to overcome the restriction on the machine diameter and meet the torque required at the wheel shaft. The paper gives guidelines for the design of a multi-stage AFPM with water-cooled ironless stator, and describes characteristics of a two-stage prototype machine rated 220 Nm, 1,100 rpm.

Caricchi, F.; Crescimbini, F.; Mezzetti, F.; Santini, E. [Univ. of Rome La Sapienza (Italy). Dept. of Electrical Engineering

1995-12-31T23:59:59.000Z

85

Vibrotactile Feedback in Steering Wheel Reduces Navigation Errors during GPS-Guided Car Driving  

E-Print Network [OSTI]

vibration motors are mounted onto the steering wheel of a driving simulator and driving experiments-based car navigation system to improve the navigation performance of a driver. In [5], vibration motors were auditory noise and distraction exist in the environment, the navigation errors (making a wrong turn

Basdogan, Cagatay

86

Friction forces on phase transition fronts  

SciTech Connect (OSTI)

In cosmological first-order phase transitions, the microscopic interaction of the phase transition fronts with non-equilibrium plasma particles manifests itself macroscopically as friction forces. In general, it is a nontrivial problem to compute these forces, and only two limits have been studied, namely, that of very slow walls and, more recently, ultra-relativistic walls which run away. In this paper we consider ultra-relativistic velocities and show that stationary solutions still exist when the parameters allow the existence of runaway walls. Hence, we discuss the necessary and sufficient conditions for the fronts to actually run away. We also propose a phenomenological model for the friction, which interpolates between the non-relativistic and ultra-relativistic values. Thus, the friction depends on two friction coefficients which can be calculated for specific models. We then study the velocity of phase transition fronts as a function of the friction parameters, the thermodynamic parameters, and the amount of supercooling.

Mgevand, Ariel, E-mail: megevand@mdp.edu.ar [IFIMAR (CONICETUNMdP), Departamento de Fsica, Facultad de Ciencias Exactas y Naturales, UNMdP, Den Funes 3350, (7600) Mar del Plata (Argentina)

2013-07-01T23:59:59.000Z

87

AdS/QCD and Applications of Light-Front Holography  

SciTech Connect (OSTI)

Light-Front Holography leads to a rigorous connection between hadronic amplitudes in a higher dimensional anti-de Sitter (AdS) space and frame-independent light-front wavefunctions of hadrons in 3 + 1 physical space-time, thus providing a compelling physical interpretation of the AdS/CFT correspondence principle and AdS/QCD, a useful framework which describes the correspondence between theories in a modified AdS5 background and confining field theories in physical space-time. To a first semiclassical approximation, where quantum loops and quark masses are not included, this approach leads to a single-variable light-front Schroedinger equation which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. The coordinate z in AdS space is uniquely identified with a Lorentz-invariant coordinate {zeta} which measures the separation of the constituents within a hadron at equal light-front time. The internal structure of hadrons is explicitly introduced and the angular momentum of the constituents plays a key role. We give an overview of the light-front holographic approach to strongly coupled QCD. In particular, we study the photon-to-meson transition form factors (TFFs) F{sub M{gamma}}(Q{sup 2}) for {gamma}{gamma}* {yields} M using light-front holographic methods. The results for the TFFs for the {eta} and {eta}' mesons are also presented. Some novel features of QCD are discussed, including the consequences of confinement for quark and gluon condensates. A method for computing the hadronization of quark and gluon jets at the amplitude level is outlined.

Brodsky, Stanley J.; /SLAC /Southern Denmark U., CP3-Origins; Cao, Fu-Guang; /Massey U.; de Teramond, Guy F.; /Costa Rica U.

2012-02-16T23:59:59.000Z

88

ibm.com/redbooks Front cover  

E-Print Network [OSTI]

ibm.com/redbooks Front cover IBM XIV Storage System: Architecture, Implementation, and Usage Organization IBM XIV Storage System: Architecture, Implementation, and Usage September 2009 SG24-7659-01 #12 Storage System software. Note: Before using this information and the product it supports, read

Westall, James M.

89

Quadratic and Cubic ReactionDiffusion Fronts*  

E-Print Network [OSTI]

's student, Herr cand. Meinecke, moved a wire loop along the test tube to mark the position in the cytoplasm of frog oocytes [9], where calcium-induced calcium release provides a mechanism akin to auto- catalysis in chemical systems. Front-like calcium waves have also been found to occur on the surface

Showalter, Kenneth

90

COLORADO FRONT RANGE SEISMICITY AND SEISMIC HAZARD  

E-Print Network [OSTI]

COLORADO FRONT RANGE SEISMICITY AND SEISMIC HAZARD Anne F. Sheehan University of Colorado at Boulder, 2200 Colorado Avenue, Boulder, CO 80309 John D. Godchaux Trinity University, San Antonio, TX Noah Hughes University of Colorado at Boulder, 2200 Colorado Avenue, Boulder, CO 80309 Key Terms: earthquake

Sheehan, Anne F.

91

QCD and Light-Front Holography  

SciTech Connect (OSTI)

The soft-wall AdS/QCD model, modified by a positive-sign dilaton metric, leads to a remarkable one-parameter description of nonperturbative hadron dynamics. The model predicts a zero-mass pion for zero-mass quarks and a Regge spectrum of linear trajectories with the same slope in the leading orbital angular momentum L of hadrons and the radial quantum number N. Light-Front Holography maps the amplitudes which are functions of the fifth dimension variable z of anti-de Sitter space to a corresponding hadron theory quantized on the light front. The resulting Lorentz-invariant relativistic light-front wave equations are functions of an invariant impact variable {zeta} which measures the separation of the quark and gluonic constituents within the hadron at equal light-front time. The result is to a semi-classical frame-independent first approximation to the spectra and light-front wavefunctions of meson and baryon light-quark bound states, which in turn predict the behavior of the pion and nucleon form factors. The theory implements chiral symmetry in a novel way: the effects of chiral symmetry breaking increase as one goes toward large interquark separation, consistent with spectroscopic data, and the the hadron eigenstates generally have components with different orbital angular momentum; e.g., the proton eigenstate in AdS/QCD with massless quarks has L = 0 and L = 1 light-front Fock components with equal probability. The soft-wall model also predicts the form of the non-perturbative effective coupling {alpha}{sub s}{sup AdS} (Q) and its {beta}-function which agrees with the effective coupling {alpha}{sub g1} extracted from the Bjorken sum rule. The AdS/QCD model can be systematically improved by using its complete orthonormal solutions to diagonalize the full QCD light-front Hamiltonian or by applying the Lippmann-Schwinger method in order to systematically include the QCD interaction terms. A new perspective on quark and gluon condensates is also reviewed.

Brodsky, Stanley J.; /SLAC /Southern Denmark U., CP3-Origins; de Teramond, Guy F.; /Costa Rica U.; ,

2010-10-27T23:59:59.000Z

92

Integration of a testbed for examining the interaction of Mars rover wheels with a Mars soil simulant  

E-Print Network [OSTI]

Integration and experimental testing was performed on a testbed for examining the interaction of Mars rover wheels with a Mars soil simulant. The testbed included a horizontal carriage that had a encoder to measure the ...

Okafor, Chiedozie A. (Chiedozie Arinze)

2011-01-01T23:59:59.000Z

93

warned that the world was asleep at the wheel. Back then, only two countries had plans to test  

E-Print Network [OSTI]

warned that the world was asleep at the wheel. Back then, only two countries had plans to test in a hospital examin- ing room in Rochester, New York. Pressing a ball of cotton into the crook of her elbow

Cai, Long

94

Optimal Three-Material Wheel Assemblage of Conducting and Elastic Composites  

E-Print Network [OSTI]

We describe a new type of three material microstructures which we call wheel assemblages, that correspond to extremal conductivity and extremal bulk modulus for a composite made of two materials and an ideal material. The exact lower bounds for effective conductivity and matching laminates was found in (Cherkaev, 2009) and for anisotropic composites, in (Cherkaev, Zhang, 2011). Here, we show different optimal structures that generalize the classical Hashin-Shtrikman coated spheres (circles). They consist of circular inclusions which contain a solid central circle (hub) and radial spikes in a surrounding annulus, and (for larger volume fractions of the best material) an annulus filled with it. The same wheel assemblages are optimal for the pair of dual problems of minimal conductivity (resistivity) of a composite made from two materials and an ideal conductor (insulator), in the problem of maximal effective bulk modulus of elastic composites made from two linear elastic material and void, and the dual minimum problem.

Andrej Cherkaev

2011-05-22T23:59:59.000Z

95

Minimizing Wheel Slip in Railway Locomotives with Coupled Permanent Magnet Synchronous Motors  

E-Print Network [OSTI]

In this work I consider control strategies of permanent magnet synchronous motors in which the back-emf signal from the motor is used to achieve commutation of the six step driving circuit. I show that if the strategy is modified to connect multiple motors in a cyclic chain, then a collective synchronized state is favoured. The stability of this state can be exploited in the bogies of a railway locomotive to automatically terminate wheel slipping episodes.

Shayak Bhattacharjee

2015-01-17T23:59:59.000Z

96

Feature-based design for heterogeneous objects Xiaoping Qiana,*,1  

E-Print Network [OSTI]

and combination of these material features, are developed. A physics (diffusion) based B-spline method the implantation. A graded layer of hydroxyapatite (HAp) is coated on the porous metal. It bonds to the bone titanium plus 0010-4485/$ - see front matter q 2004 Elsevier L

Qian, Xiaoping

97

Kepler White Paper: Asteroseismology of Solar-Like Oscillators in a 2-Wheel Mission  

E-Print Network [OSTI]

We comment on the potential for continuing asteroseismology of solar-type and red-giant stars in a 2-wheel Kepler Mission. Our main conclusion is that by targeting stars in the ecliptic it should be possible to perform high-quality asteroseismology, as long as favorable scenarios for 2-wheel pointing performance are met. Targeting the ecliptic would potentially facilitate unique science that was not possible in the nominal Mission, notably from the study of clusters that are significantly brighter than those in the Kepler field. Our conclusions are based on predictions of 2-wheel observations made by a space photometry simulator, with information provided by the Kepler Project used as input to describe the degraded pointing scenarios. We find that elevated levels of frequency-dependent noise, consistent with the above scenarios, would have a significant negative impact on our ability to continue asteroseismic studies of solar-like oscillators in the Kepler field. However, the situation may be much more optimi...

Chaplin, W J; Christensen-Dalsgaard, J; Gilliland, R L; Kawaler, S D; Basu, S; De Ridder, J; Huber, D; Arentoft, T; Schou, J; Garcia, R A; Metcalfe, T S; Brogaard, K; Campante, T L; Elsworth, Y; Miglio, A; Appourchaux, T; Bedding, T R; Hekker, S; Houdek, G; Karoff, C; Molenda-Zakowicz, J; Monteiro, M J P F G; Aguirre, V Silva; Stello, D; Ball, W; Beck, P G; Birch, A C; Buzasi, D L; Casagrande, L; Cellier, T; Corsaro, E; Creevey, O L; Davies, G R; Deheuvels, S; Dogan, G; Gizon, L; Grundahl, F; Guzik, J; Handberg, R; Jimenez, A; Kallinger, T; Lund, M N; Lundkvist, M; Mathis, S; Mathur, S; Mazumdar, A; Mosser, B; Neiner, C; Nielsen, M B; Palle, P L; Pinsonneault, M H; Salabert, D; Serenelli, A M; Shunker, H; White, T R

2013-01-01T23:59:59.000Z

98

Front contact solar cell with formed emitter  

SciTech Connect (OSTI)

A bipolar solar cell includes a backside junction formed by an N-type silicon substrate and a P-type polysilicon emitter formed on the backside of the solar cell. An antireflection layer may be formed on a textured front surface of the silicon substrate. A negative polarity metal contact on the front side of the solar cell makes an electrical connection to the substrate, while a positive polarity metal contact on the backside of the solar cell makes an electrical connection to the polysilicon emitter. An external electrical circuit may be connected to the negative and positive metal contacts to be powered by the solar cell. The positive polarity metal contact may form an infrared reflecting layer with an underlying dielectric layer for increased solar radiation collection.

Cousins, Peter John

2014-11-04T23:59:59.000Z

99

Front contact solar cell with formed emitter  

DOE Patents [OSTI]

A bipolar solar cell includes a backside junction formed by an N-type silicon substrate and a P-type polysilicon emitter formed on the backside of the solar cell. An antireflection layer may be formed on a textured front surface of the silicon substrate. A negative polarity metal contact on the front side of the solar cell makes an electrical connection to the substrate, while a positive polarity metal contact on the backside of the solar cell makes an electrical connection to the polysilicon emitter. An external electrical circuit may be connected to the negative and positive metal contacts to be powered by the solar cell. The positive polarity metal contact may form an infrared reflecting layer with an underlying dielectric layer for increased solar radiation collection.

Cousins, Peter John (Menlo Park, CA)

2012-07-17T23:59:59.000Z

100

Light-front chiral effective field theory  

SciTech Connect (OSTI)

We propose a general framework to calculate the nonperturbative structure of relativistic bound state systems. The state vector of the bound state is calculated in the covariant formulation of light-front dynamics. In this scheme, the state vector is defined on the light front of general position {omega} {center_dot} x = 0, where {omega} is an arbitrary light-like four-vector. This enables a strict control of any violation of rotational invariance. The state vector is then decomposed in Fock components. Our formalism is applied to the description of the nucleon properties at low energy, in chiral perturbation theory. We also show that the use of a recently proposed regularization scheme, the so-called Taylor-Lagrange regularization scheme, is very adequate in order to treat divergences in this nonperturbative framework.

Mathiot, J.-F. [Laboratoire de Physique Corpusculaire (France)] [Laboratoire de Physique Corpusculaire (France); Tsirova, N. A., E-mail: ntsirova@ssu.samara.ru [Samara State University (Russian Federation)

2013-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

Pentan isomers compound flame front structure  

SciTech Connect (OSTI)

The fuels (hexane, pentane, diethyl ether) and conditions investigated in this study are relevant to engine knock in spark- ignition engines. A review is provided of the field of low temperature hydrocarbon oxidation. Studies were made of radical and stable intermediate distribution in the front of cool flames: Maximum concentrations of H atoms and peroxy radicals were observed in the luminous zone of the cool flame front. Peroxy radicals appear before the luminous zone at 430 K due to diffusion. H atoms were found in cool flames of butane and hexane. H atoms diffuses from the luminous zone to the side of the fresh mixture, and they penetrate into the fresh mixture to a small depth. Extension of action sphear of peroxy radicals in the fresh mixture is much greater than that of H atoms due to their small activity and high concentrations.

Mansurov, Z.A.; Mironenko, A.W.; Bodikov, D.U.; Rachmetkaliev, K.N. [Kazakh Al-Farabi State National Univ., Almaty (Kazakhstan)

1995-08-13T23:59:59.000Z

102

Colloid Formation at Waste Plume Fronts  

SciTech Connect (OSTI)

Highly saline and caustic tank waste solutions containing radionuclides and toxic metals have leaked into sediments at U. S. Department of Energy (DOE) facilities such as the Hanford Site (Washington State). Colloid transport is frequently invoked to explain migration of radionuclides and metals in the subsurface. To understand colloid formation during interactions between highly reactive fluids and sediments and its impact on contaminant transport, we simulated tank waste solution (TWS) leakage processes in laboratory columns at ambient and elevated (70 C) temperatures. We found that maximum formation of mobile colloids occurred at the plume fronts (hundreds to thousands times higher than within the plume bodies or during later leaching). Concentrations of suspended solids were as high as 3 mass%, and their particle-sizes ranged from tens of nm to a few {micro}m. Colloid chemical composition and mineralogy depended on temperature. During infiltration of the leaked high Na{sup +} waste solution, rapid and completed Na{sup +} replacement of exchangeable Ca{sup 2+} and Mg{sup 2+} from the sediment caused accumulation of these divalent cations at the moving plume front. Precipitation of supersaturated Ca{sup 2+}/Mg{sup 2+}-bearing minerals caused dramatic pH reduction at the plume front. In turn, the reduced pH caused precipitation of other minerals. This understanding can help predict the behavior of contaminant trace elements carried by the tank waste solutions, and could not have been obtained through conventional batch studies.

Wan, Jiamin; Tokunaga, Tetsu K.; Saiz, Eduardo; Larsen, Joern T.; Zheng, Zuoping; Couture, Rex A.

2004-05-22T23:59:59.000Z

103

A Performance Comparison of Features Used in Vibration- Based Health Monitoring of a Complex Mechanism /  

E-Print Network [OSTI]

the main code wheel does not over rotate, a ball and springin the main wheel. The smallest ball and plunger availablecode wheel where chosen based off the size of the ball and

Zsiga, Luke Mathieson

2013-01-01T23:59:59.000Z

104

Nonperturbative calculations in light-front QED  

SciTech Connect (OSTI)

The methods of light-front quantization and Pauli-Villars regularization are applied to a nonperturbative calculation of the dressed-electron state in quantum electrodynamics. This is intended as a test of the methods in a gauge theory, as a precursor to possible methods for the nonperturbative solution of quantum chromodynamics. The electron state is truncated to include at most two photons and no positrons in the Fock basis, and the wave functions of the dressed state are used to compute the electrons's anomalous magnetic moment. A choice of regularization that preserves the chiral symmetry of the massless limit is critical for the success of the calculation.

Chabysheva, Sophia S. [Department of Physics, University of Minnesota-Duluth, Duluth, Minnesota 55812 (United States)

2010-12-22T23:59:59.000Z

105

Sandia National Laboratories: Front Edge Technology Inc.  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErik Spoerke SSLS Exhibit at Explora MuseumFloatingFront Edge Technology Inc.

106

Improved wastewater treatment at Wheeling-Pittsburgh Steel Corporations`s Steubenville East Coke Plant  

SciTech Connect (OSTI)

Wheeling-Pittsburgh Steel Corporation recently improved its wastewater treatment at it`s by-products coke plant. This has led to greatly improved effluent quality. Excess ammonia liquor, along with wastewater from the light oil recovery plant, desulfurization facility, and coal pile runoff, must be treated prior to being discharged into the Ohio River. This is accomplished using a biological wastewater treatment plant to remove 99.99% of the organic contaminants and ammonia. Biologically treated, clarified wastewater is now polished in the newly constructed tertiary treatment plant.

Goshe, A.J.; Nodianos, M.J. [Wheeling-Pittsburgh Steel Corp., Follansbee, WV (United States)

1995-12-01T23:59:59.000Z

107

The Wheels on the Bus Go Round and Round... | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up from theDepartment of EnergyThe Sun and Its Energy (11 activities)The Wheels on

108

Identifying Lagrangian fronts with favourable fishery conditions  

E-Print Network [OSTI]

Lagrangian fronts (LF) in the ocean delineate boundaries between surface waters with different Lagrangian properties. They can be accurately detected in a given velocity field by computing synoptic maps of the drift of synthetic tracers and other Lagrangian indicators. Using Russian ship's catch and location data for a number of commercial fishery seasons in the region of the northwest Pacific with one of the richest fishery in the world, it is shown statistically that the saury fishing grounds with maximal catches are not randomly distributed over the region but located mainly along those LFs where productive cold waters of the Oyashio Current, warmer waters of the southern branch of the Soya Current, and waters of warm-core Kuroshio rings converge. Computation of those fronts with the altimetric geostrophic velocity fields both in the years with the First and Second Oyashio Intrusions shows that in spite of different oceanographic conditions the LF locations may serve good indicators of potential fishing grounds. Possible reasons for saury aggregation near LFs are discussed. We propose a mechanism of effective export of nutrient rich waters based on stretching of material lines in the vicinity of hyperbolic objects in the ocean. The developed method, based on identifying LFs in any velocity fields, is quite general and may be applied to forecast potential fishing grounds for the other pelagic fishes in different seas and the oceans.

S. V. Prants; M. V. Budyansky; M. Yu. Uleysky

2013-06-20T23:59:59.000Z

109

Magnesium Front End Design And Development (AMD603)  

Broader source: Energy.gov (indexed) [DOE]

edm2@chrysler.com February 28, 2008 Magnesium Front End Design And Development (AMD603) This presentation does not contain any proprietary or confidential information USAMP 2008...

110

apennine front kreep: Topics by E-print Network  

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

Department of Chemical Engineering References and links 1. J. Warnatz, U. Maas, and R.W. Dibble, Combustion - physical and chemical fundamentals, "Characterization of flame front...

111

The Front Burner Cybersecurity The ACIO for Cybersecurity  

Broader source: Energy.gov (indexed) [DOE]

Special Edition of The Front Burner Cybersecurity The ACIO for Cybersecurity Issue No. 13 October 2012 National Cybersecurity Awareness Month October 2012 The Department of Energy...

112

Fiber optic sensor system for detecting movement or position of a rotating wheel bearing  

DOE Patents [OSTI]

An improved fiber optic sensor system and integrated sensor bearing assembly for detecting movement or position of a rotating wheel bearing having a multi-pole tone ring which produces an alternating magnetic field indicative of movement and position of the rotating member. A magneto-optical material, such as a bismuth garnet iron (B.I.G.) crystal, having discrete magnetic domains is positioned in the vicinity of the tone ring so that the domains align themselves to the magnetic field generated by the tone ring. A single fiber optic cable, preferably single mode fiber, carries light generated by a source of light to the B.I.G. crystal. The light passes through the B.I.G. crystal and is refracted at domain boundaries in the crystal. The intensity of the refracted light is indicative of the amount of alignment of the domains and therefore the strength of the magnetic field. The refracted light is carried by the fiber optic cable to an optic receiver where the intensity is measured and an electrical signal is generated and sent to a controller indicating the frequency of the changes in light intensity and therefore the rotational speed of the rotating wheel bearing.

Veeser, Lynn R. (Los Alamos, NM); Rodriguez, Patrick J. (Santa Fe, NM); Forman, Peter R. (Los Alamos, NM); Monahan, Russell E. (Ann Arbor, MI); Adler, Jonathan M. (Ypsilanti, MI)

1997-01-01T23:59:59.000Z

113

IEEE Int'l Conf. on Robotics and Automation (ICRA), May 14-18, 2012 Planning in High-dimensional Shape Space for a Single-wheeled  

E-Print Network [OSTI]

on a single ball. Achieving desired motions in position space is a challenging task for such systems due mobile robot that moves on a single ball. The single, spherical wheel enables the robot to achieve omni-dimensional Shape Space for a Single-wheeled Balancing Mobile Robot with Arms Umashankar Nagarajan, Byungjun Kim

114

Front-end electronics and trigger systems - status and challenges  

SciTech Connect (OSTI)

The past quarter century has brought about a revolution in front-end electronics for large-scale detector systems. Custom integrated circuits specifically tailored to the requirements of large detector systems have provided unprecedented performance and enabled systems that once were deemed impossible. The evolution of integrated circuit readouts in strip detectors is summarized, the present status described, and challenges posed by the sLHC and ILC are discussed. Performance requirements increase, but key considerations remain as in the past: power dissipation, material, and services. Smaller CMOS feature sizes will not provide the required electronic noise at lower power, but will improve digital power efficiency. Significant improvements appear to be practical in more efficient power distribution. Enhanced digital electronics have provided powerful trigger processors that greatly improve the trigger efficiency. In data readout systems they also improve data throughput, while reducing power requirements. Concurrently with new developments in high energy physics, detector systems for cosmology and astrophysics have made great strides. As an example, a large-scale readout for superconducting bolometer arrays is described.

Spieler, Helmuth G; Spieler, Helmuth G

2007-08-21T23:59:59.000Z

115

Front lighted optical tooling method and apparatus  

DOE Patents [OSTI]

An optical tooling method and apparatus uses a front lighted shadowgraphic technique to enhance visual contrast of reflected light. The apparatus includes an optical assembly including a fiducial mark, such as cross hairs, reflecting polarized light with a first polarization, a polarizing element backing the fiducial mark and a reflective surface backing the polarizing element for reflecting polarized light bypassing the fiducial mark and traveling through the polarizing element. The light reflected by the reflecting surface is directed through a second pass of the polarizing element toward the frontal direction with a polarization differing from the polarization of the light reflected by the fiducial mark. When used as a tooling target, the optical assembly may be mounted directly to a reference surface or may be secured in a mounting, such as a magnetic mounting. The optical assembly may also be mounted in a plane defining structure and used as a spherometer in conjunction with an optical depth measuring instrument.

Stone, W.J.

1983-06-30T23:59:59.000Z

116

Front contact solar cell with formed electrically conducting layers on the front side and backside  

DOE Patents [OSTI]

A bipolar solar cell includes a backside junction formed by a silicon substrate and a first doped layer of a first dopant type on the backside of the solar cell. A second doped layer of a second dopant type makes an electrical connection to the substrate from the front side of the solar cell. A first metal contact of a first electrical polarity electrically connects to the first doped layer on the backside of the solar cell, and a second metal contact of a second electrical polarity electrically connects to the second doped layer on the front side of the solar cell. An external electrical circuit may be electrically connected to the first and second metal contacts to be powered by the solar cell.

Cousins, Peter John

2012-06-26T23:59:59.000Z

117

Heuristically Driven Front Propagation for Fast Geodesic Extraction  

E-Print Network [OSTI]

Heuristically Driven Front Propagation for Fast Geodesic Extraction Gabriel Peyr´e Laurent D. Cohen to quickly extract geodesic paths on images and 3D meshes. We use a heuristic to drive the front propagation that is similar to the A algorithm used in artificial intelli- gence. In order to find very quickly geodesic paths

Paris-Sud XI, Université de

118

Combustion fronts in porous media with two layers Steve Schecter  

E-Print Network [OSTI]

Combustion fronts in porous media with two layers layer 1 layer 2 Steve Schecter North Carolina Subject: Propagation of a combustion front through a porous medium with two parallel layers having different properties. · Each layer admits a traveling combustion wave. · The layers are coupled by heat

Schecter, Stephen

119

FLUCTUATIONS OF THE FRONT IN A STOCHASTIC COMBUSTION MODEL  

E-Print Network [OSTI]

FLUCTUATIONS OF THE FRONT IN A STOCHASTIC COMBUSTION MODEL #1; (FLUCTUATIONS DU FRONT DANS UN MOD?LE DE COMBUSTION) FRANCIS COMETS 1 , JEREMY QUASTEL 2 AND ALEJANDRO F. RAMÍREZ 3 Abstract. We consider an interacting particle system on the one dimensional lattice Z modeling combustion. The process

Quastel, Jeremy

120

Description and Simulation of Gust Front Wind Field Lijuan Wanga  

E-Print Network [OSTI]

-stationarity of the wind field associated with these extreme events poses serious challenges in their modelingDescription and Simulation of Gust Front Wind Field Lijuan Wanga , Ahsan Kareemb a Nat front wind field is proposed based on the time-frequency description of the wind field. Traditionally

Kareem, Ahsan

Note: This page contains sample records for the topic "features front wheel" 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

features Utility Generator  

E-Print Network [OSTI]

#12;#12;#12;#12;features function utility Training Pool Utility Generator Per-frame function content utility classes utility classes utility Tree Decision Generator Module Utility Clustering Adaptive Content Classification Loop features content VO selection & Utility Selector content features Real

Chang, Shih-Fu

122

Washboard Road: The Dynamics of Granular Ripples Formed by Rolling Wheels Nicolas Taberlet,1,2,* Stephen W. Morris,3  

E-Print Network [OSTI]

experiments on rippled granular surfaces formed under rolling wheels. Ripples appear above a critical speed surface under tangential stress is reminiscent of other sorts of wind- and water-driven ripples [2 rolled freely on the sand bed as the table rotated at a constant speed. No torque was applied

McElwaine, Jim

123

Well-to-Wheels Energy Use and Greenhouse Gas Emissions of Plug-In Hybrid Electric Vehicles  

E-Print Network [OSTI]

) Note: PSAT included after-treatment thermal efficiency penalty to the diesel fuel economy · CD ElectricWell-to-Wheels Energy Use and Greenhouse Gas Emissions of Plug-In Hybrid Electric Vehicles Amgad engine vehicles (ICEVs) Regular hybrid electric vehicles (HEVs) Plug-in hybrid electric vehicles (PHEVs

124

Abstract--This video submission presents the experimental validation and testing of a leg-wheel hybrid mobile robot  

E-Print Network [OSTI]

is installed inside the spoke and its power and control signal are passed through a connector pair, which have separate mechanisms of wheels and legs, this robot is implemented with a transformation mechanism inventions specialized in rolling on the flat ground, whose excellent performance of power efficiency

Lin, Pei-Chun

125

State Transition, Balancing, Station Keeping, and Yaw Control for a Dynamically Stable Single Spherical Wheel Mobile Robot  

E-Print Network [OSTI]

with a four-motor inverse mouse- ball drive, yaw drive, leg drive, control system, and results including present the results and conclusions. II. SYSTEM DESCRIPTION A. Four-Motor Inverse Mouse-Ball Drive Spherical Wheel Mobile Robot Umashankar Nagarajan, Anish Mampetta, George A. Kantor and Ralph L. Hollis

126

Good Wheel Hunting: UMass Lowell's Scavenger Hunt Robot System Robert Casey, Andrew Chanler, Munjal Desai, Brenden Keyes,  

E-Print Network [OSTI]

Good Wheel Hunting: UMass Lowell's Scavenger Hunt Robot System Robert Casey, Andrew Chanler, Munjal was built on top of the system we have been developing for urban search and rescue (USAR) research. The system includes new behaviors and behavior sequencing, vision algorithms and sensor processing algorithms

Yanco, Holly A.

127

February 7, 2009 "Friends come first, mathematics after." Raoul once said, as he smiled and wheeled his bicycle out  

E-Print Network [OSTI]

and wheeled his bicycle out of his office, and down the corridor to meet a visiting friend of his in a local coffee shop, his worn golden-brown portfolio balanced on his bicycle seat. Raoul Bott was a wonderful: as he smiled, made his way down a corridor, looked for his lost gloves, walked his bicycle

Mazur, Barry

128

Light-Front Holography: A First Approximation to QCD  

SciTech Connect (OSTI)

Starting from the Hamiltonian equation of motion in QCD, we identify an invariant light-front coordinate {zeta} which allows the separation of the dynamics of quark and gluon binding from the kinematics of constituent spin and internal orbital angular momentum. The result is a single variable light-front Schroedinger equation for QCD which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. This light-front wave equation is equivalent to the equations of motion which describe the propagation of spin-J modes on anti-de Sitter (AdS) space. This allows us to establish formally a gauge/gravity correspondence between an effective gravity theory defined on AdS5 and light front QCD.

de Teramond, Guy F.; Brodsky, Stanley J.

2008-10-03T23:59:59.000Z

129

Delayed muons in extensive air showers and double-front showers  

SciTech Connect (OSTI)

The results of a long-term experiment performed in the period between 1995 and 2006 with the aid of the MUON-T underground (20 mwe) scintillation facility arranged at the Tien Shan mountain research station at an altitude of 3340 m above sea level are presented. The time distribution of delayed muons with an energy in excess of 5 GeV in extensive air showers of energy not lower than 106 GeV with respect to the shower front was obtained with a high statistical significance in the delay interval between 30 and 150 ns. An effect of the geomagnetic field in detecting delayed muons in extensive air showers was discovered. This effect leads to the asymmetry of their appearance with respect to the north-south direction. The connection between delayed muons and extensive air showers featuring two fronts separated by a time interval of several tens of to two hundred nanoseconds is discussed. This connection gives sufficient grounds to assume that delayed muons originate from the decays of pions and kaons produced in the second, delayed, front of extensive air showers.

Beisembaev, R. U.; Vavilov, Yu. N., E-mail: yuvavil@mail.ru; Vildanov, N. G.; Kruglov, A. V.; Stepanov, A. V. [Russian Academy of Sciences, Lebedev Institute of Physics (Russian Federation); Takibaev, J. S. [Al-Farabi Kazakh National University (Kazakhstan)

2009-11-15T23:59:59.000Z

130

Design and analysis of an articulated spoke multi-modal robot and design and implementation of object manipulation features  

E-Print Network [OSTI]

pickup a ball. Ball Storage When the wheel holding a ballthe wheels and the ground, between the ball and channels,added to the wheels to develop the ball pickup mechanism.

Sams, Benjamin Andrew

2011-01-01T23:59:59.000Z

131

Front lighted optical tooling method and apparatus  

DOE Patents [OSTI]

An optical tooling method and apparatus uses a front lighted shadowgraphic technique to enhance visual contrast of reflected light. The apparatus includes an optical assembly including a fiducial mark, such as cross hairs, reflecting polarized light with a first polarization, a polarizing element backing the fiducial mark and a reflective surface backing the polarizing element for reflecting polarized light bypassing the fiducial mark and traveling through the polarizing element. The light reflected by the reflecting surface is directed through a second pass of the polarizing element toward the frontal direction with a polarization differing from the polarization of the light reflected by the fiducial mark. When used as a tooling target, the optical assembly may be mounted directly to a reference surface or may be secured in a mounting, such as a magnetic mounting. The optical assembly may also be mounted in a plane defining structure and used as a spherometer in conjunction with an optical depth measuring instrument. A method of measuring a radius of curvature of an unknown surface includes positioning the spherometer on a surface between the surface and a depth measuring optical instrument. As the spherometer is frontally illuminated, the distance from the depth measuring instrument to the fiducial mark and the underlying surface are alternately measured and the difference in these measurements is used as the sagittal height to calculate a radius of curvature.

Stone, William J. (Kansas City, MO)

1985-06-18T23:59:59.000Z

132

Gravity currents in a two-layer stratified ambient: The theory for the steady-state (front condition) and lock-released flows, and experimental  

E-Print Network [OSTI]

Gravity currents in a two-layer stratified ambient: The theory for the steady- state (front://pof.aip.org/features/most_downloaded Information for Authors: http://pof.aip.org/authors #12;PHYSICS OF FLUIDS 24, 026601 (2012) Gravity currents February 2012) We consider the propagation of a gravity current of density c at the bottom of a two

Flynn, Morris R.

133

Electron g-2 in Light-Front Quantization  

E-Print Network [OSTI]

Basis Light-front Quantization has been proposed as a nonperturbative framework for solving quantum field theory. We apply this approach to Quantum Electrodynamics and explicitly solve for the light-front wave function of a physical electron. Based on the resulting light-front wave function, we evaluate the electron anomalous magnetic moment. Nonperturbative mass renormalization is performed. Upon extrapolation to the infinite basis limit our numerical results agree with the Schwinger result obtained in perturbation theory to an accuracy of 0.06%.

Xingbo Zhao; Heli Honkanen; Pieter Maris; James P. Vary; Stanley J. Brodsky

2014-08-24T23:59:59.000Z

134

Biofuels development in Maine: Using trees to oil the wheels of sustainability -Maine news, sports, obituaries, weather -Bangor Daily News http://bangordailynews.com/2013/03/12/opinion/biofuels-development-in-maine-using-trees-to-oil-the-wheels-of-sustain  

E-Print Network [OSTI]

Biofuels development in Maine: Using trees to oil the wheels of sustainability - Maine news, sports, obituaries, weather - Bangor Daily News http://bangordailynews.com/2013/03/12/opinion/biofuels-development-in-maine-using-trees-to-oil-the-wheels-of-sustainability/print/[3/13/2013 1:54:43 PM] Biofuels development

Thomas, Andrew

135

Home Front as Warfront: African American World War I Drama  

E-Print Network [OSTI]

This dissertation recovers little-known African American World War I plays that blur the boundary between the home front and warfront. I argue that with this focus, the plays wage their own war for African American citizenship ...

Egging, Anna Katherine

2010-08-31T23:59:59.000Z

136

Advanced integrated safeguards using front-end-triggering devices  

SciTech Connect (OSTI)

This report addresses potential uses of front-end-triggering devices for enhanced safeguards. Such systems incorporate video surveillance as well as radiation and other sensors. Also covered in the report are integration issues and analysis techniques.

Howell, J.A.; Whitty, W.J.

1995-12-01T23:59:59.000Z

137

Carbon Emissions from Smouldering Peat in Shallow and Strong Fronts  

E-Print Network [OSTI]

A series of experiments of shallow and strong smouldering fronts in boreal peat have been conducted under laboratory conditions to study the CO and CO2 emissions. Peat samples of 100 mm by 100 mm in cross section and 50 ...

Rein, Guillermo; Cohen, Simon; Simeoni, Albert

2009-01-01T23:59:59.000Z

138

Global optimization of silicon photovoltaic cell front coatings  

E-Print Network [OSTI]

The front-coating (FC) of a solar cell controls its efficiency, determining admission of light into the absorbing material and potentially trapping light to enhance thin absorbers. Single-layer FC designs are well known, ...

Ghebrebrhan, Michael

139

Speed-up of combustion fronts in shear flows  

E-Print Network [OSTI]

This paper is concerned with the analysis of speed-up of reaction-diffusion-advection traveling fronts in infinite cylinders with periodic boundary conditions. The advection is a shear flow with a large amplitude and the reaction is nonnegative, with either positive or zero ignition temperature. The unique or minimal speeds of the traveling fronts are proved to be asymptotically linear in the flow amplitude as the latter goes to infinity, solving an open problem from \\cite{b}. The asymptotic growth rate is characterized explicitly as the unique or minimal speed of traveling fronts for a limiting degenerate problem, and the convergence of the regular traveling fronts to the degenerate ones is proved for positive ignition temperatures under an additional H{\\"{o}}rmander-type condition on the flow.

Hamel, Francois

2011-01-01T23:59:59.000Z

140

Colorado Front Range Fuel Photo Series Michael A. Battaglia  

E-Print Network [OSTI]

Colorado Front Range Fuel Photo Series Michael A. Battaglia Jonathan M. Dodson Wayne D. Shepperd of Agriculture Forest Service Rocky Mountain Research Station June 2005 #12;Battaglia, Michael A.; Dodson

Fried, Jeremy S.

Note: This page contains sample records for the topic "features front wheel" 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

Renormalized Light Front Hamiltonian in the Pauli-Villars Regularization  

E-Print Network [OSTI]

We address the problem of nonperturbative calculations on the light front in quantum field theory regularized by Pauli-Villars method. As a preliminary step we construct light front Hamiltonians in (2+1)-dimensional $\\lambda\\phi^4$ model, for the cases without and with spontaneous symmetry breaking. The renormalization of these Hamiltonians in Pauli-Villars regularization is carried out via comparison of all-order perturbation theory, generated by these Hamiltonians, and the corresponding covariant perturbation theory in Lorentz coordinates.

M. Yu. Malyshev; S. A. Paston; E. V. Prokhvatilov; R. A. Zubov

2014-09-03T23:59:59.000Z

142

ITS Technologies in Military Wheeled Tactical Vehicles: Status Quo and the Future  

SciTech Connect (OSTI)

The U.S. Army operates and maintains the largest trucking fleet in the United States. Its fleet consists of over 246,000 trucks, and it is responsible for buying and developing trucks for all branches of the armed forces. The Army's tactical wheeled vehicle fleet is the logistical backbone of the Army, and annually, the fleet logs about 823 million miles. The fleet consists of a number of types of vehicles. They include eight different families of trucks from the High Mobility Multi-Purpose Wheeled Vehicles to M900 series line haul tractors and special bodies. The average age of all the trucks within the Army fleet is 15 years, and very few have more than traditional driving instrumentation on-board. Over the past decade, the Department of Transportation's (DOT's) Intelligent Transportation Systems (ITS) Program has conducted research and deployment activities in a number of areas including in-vehicle systems, communication and telematics technologies. Many current model passenger vehicles have demonstrated the assimilation of these technologies to enhance safety and trip quality. Commercial vehicles are also demonstrating many new electronic devices that are assisting in making them safer and more efficient. Moreover, a plethora of new technologies are about to be introduced to drivers that promise greater safety, enhanced efficiency, congestion avoidance, fuel usage reduction, and enhanced trip quality. The U.S. Army has special needs with regard to fleet management, logistics, sustainability, reliability, survivability, and fuel consumption that goes beyond similar requirements within the private industry. In order to effectively apply emerging ITS technologies to the special needs of the U.S. Army, planning for the conduct of the Army's Vehicle Intelligence Program (AVIP) has now commenced. The AVIP will be focused on the conduct of research that: (1) will apply ITS technologies to the special needs of the Army, and (2) will conduct research for special needs wi th regard to vehicle control, driver assistance, integration of vehicle intelligence and robotic technologies, managing effectively the information flow to drivers, enhanced logistics capabilities and sustainability of the Army's fleet during battlefield conditions. This paper will highlight the special needs of the Army, briefly describe two programs, which are embracing ITS technologies to a limited extent, will outline the AVIP, and will provide some insight into future Army vehicle intelligence efforts.

Knee, H.E.

2001-07-02T23:59:59.000Z

143

The role of the cant and lateral position of the steering wheel in the orientation of drivers to the location of the automotive pedals  

E-Print Network [OSTI]

examined the effects of three steering wheel cants and three steering wheel lateral positions on drivers' preferred automotive foot pedal locations and separation distances. The dependent variables were the preferred vertical and horizontal positions... in orienting the driver to the locations of the pedals and should be part of any design recommendations detailing the relationship between the driver and the foot pedals. ACKNOWLEDGEMENTS I would like to thank the chairman of my Advisory Committee, Dr...

Sherrod, M. G

1989-01-01T23:59:59.000Z

144

DVU Featured Training & Events ...  

Broader source: Energy.gov (indexed) [DOE]

Featured Training & Events Form Please complete this form in its entirety and email to AskTheDvu@hq.doe.gov 1. Course Title: 2. Course StartEnd Date: 3. StartEnd Time (Time zone...

145

Methods for enhancing mapping of thermal fronts in oil recovery  

DOE Patents [OSTI]

A method for enhancing the resistivity contrasts of a thermal front in an oil recovery production field as measured by the CSAMT technique is disclosed. This method includes the steps of: (a) preparing a CSAMT-determined topological resistivity map of the production field; (b) introducing a solution of a dopant material into the production field at a concentration effective to alter the resistivity associated with the thermal front; said dopant material having a high cation exchange capacity which might be selected from the group consisting of montmorillonite, illite, and chlorite clays; said material being soluble in the connate water of the production field; (c) preparing a CSAMT-determined topological resistivity map of the production field while said dopant material is moving therethrough; and (d) mathematically comparing the maps from step (a) and step (c) to determine the location of the thermal front. This method is effective with the steam flood, fire flood and water flood techniques.

Lee, David O. (Albuquerque, NM); Montoya, Paul C. (Albuquerque, NM); Wayland, Jr., James R. (Albuquerque, NM)

1987-01-01T23:59:59.000Z

146

Acoustic wave front reversal in a three-phase media  

E-Print Network [OSTI]

Acoustic wave front conjugation is studied in a sandy marine sediment that contains air bubbles in its fluid fraction. The considered phase conjugation is a four-wave nonlinear parametric sound interaction process caused by nonlinear bubble oscillations which are known to be dominant in acoustic nonlinear interactions in three-phase marine sediments. Two various mechanisms of phase conjugation are studied. One of them is based on the stimulated Raman-type sound scattering on resonance bubble oscillations. The second one is associated with sound interactions with bubble oscillations which frequencies are far from resonance bubble frequencies. Nonlinear equations to solve the wave-front conjugation problem are derived, expressions for acoustic wave amplitudes with a reversed wave front are obtained and compared for various frequencies of the excited bubble oscillations.

N. I. Pushkina

2015-03-05T23:59:59.000Z

147

Acoustic wave front conjugation in a three-phase media  

E-Print Network [OSTI]

Acoustic wave front reversal is studied in a sandy marine sediment that contains air bubbles in its fluid fraction. The considered phase conjugation is a four-wave nonlinear parametric sound interaction process caused by nonlinear bubble oscillations which are known to be dominant in acoustic nonlinear interactions in three-phase marine sediments. Two various mechanisms of phase conjugation are studied. One of them is based on the stimulated Raman-type sound scattering on resonance bubble oscillations. The second one is associated with sound interactions with bubble oscillations which frequencies are far from resonance bubble frequencies. Nonlinear equations to solve the wave-front conjugation problem are derived, expressions for acoustic wave amplitudes with a reversed wave front are obtained and compared for various frequencies of the excited bubble oscillations.

Pushkina, N I

2015-01-01T23:59:59.000Z

148

Methods for enhancing mapping of thermal fronts in oil recovery  

DOE Patents [OSTI]

A method for enhancing the resistivity contrasts of a thermal front in an oil recovery production field as measured by the controlled source audio frequency magnetotelluric (CSAMT) technique is disclosed. This method includes the steps of: (1) preparing a CSAMT-determined topological resistivity map of the production field; (2) introducing a solution of a dopant material into the production field at a concentration effective to alter the resistivity associated with the thermal front; said dopant material having a high cation exchange capacity which might be selected from the group consisting of montmorillonite, illite, and chlorite clays; said material being soluble in the conate water of the production field; (3) preparing a CSAMT-determined topological resistivity map of the production field while said dopant material is moving therethrough; and (4) mathematically comparing the maps from step (1) and step (3) to determine the location of the thermal front. This method is effective with the steam flood, fire flood and water flood techniques.

Lee, D.O.; Montoya, P.C.; Wayland, J.R. Jr.

1984-03-30T23:59:59.000Z

149

Light-Front Holography and Non-Perturbative QCD  

SciTech Connect (OSTI)

The combination of Anti-de Sitter space (AdS) methods with light-front holography leads to a semi-classical first approximation to the spectrum and wavefunctions of meson and baryon light-quark bound states. Starting from the bound-state Hamiltonian equation of motion in QCD, we derive relativistic light-front wave equations in terms of an invariant impact variable {zeta} which measures the separation of the quark and gluonic constituents within the hadron at equal light-front time. These equations of motion in physical space-time are equivalent to the equations of motion which describe the propagation of spin-J modes in anti-de Sitter (AdS) space. Its eigenvalues give the hadronic spectrum, and its eigenmodes represent the probability distribution of the hadronic constituents at a given scale. Applications to the light meson and baryon spectra are presented. The predicted meson spectrum has a string-theory Regge form M{sup 2} = 4{kappa}{sup 2}(n + L + S = 2); i.e., the square of the eigenmass is linear in both L and n, where n counts the number of nodes of the wavefunction in the radial variable {zeta}. The space-like pion form factor is also well reproduced. One thus obtains a remarkable connection between the description of hadronic modes in AdS space and the Hamiltonian formulation of QCD in physical space-time quantized on the light-front at fixed light-front time {tau}. The model can be systematically improved by using its complete orthonormal solutions to diagonalize the full QCD light-front Hamiltonian or by applying the Lippmann-Schwinger method in order to systematically include the QCD interaction terms.

Brodsky, Stanley J.; /SLAC; de Teramond, Guy F.; /Costa Rica U.

2009-12-09T23:59:59.000Z

150

EXPERIENCE WITH FPGA-BASED PROCESSOR CORE AS FRONT-END COMPUTER.  

SciTech Connect (OSTI)

The RHIC control system architecture follows the familiar ''standard model''. LINUX workstations are used as operator consoles. Front-end computers are distributed around the accelerator, close to equipment being controlled or monitored. These computers are generally based on VMEbus CPU modules running the VxWorks operating system. I/O is typically performed via the VMEbus, or via PMC daughter cards (via an internal PCI bus), or via on-board I/O interfaces (Ethernet or serial). Advances in FPGA size and sophistication now permit running virtual processor ''cores'' within the FPGA logic, including ''cores'' with advanced features such as memory management. Such systems offer certain advantages over traditional VMEbus Front-end computers. Advantages include tighter coupling with FPGA logic, and therefore higher I/O bandwidth, and flexibility in packaging, possibly resulting in a lower noise environment and/or lower cost. This paper presents the experience acquired while porting the RHIC control system to a PowerPC 405 core within a Xilinx FPGA for use in low-level RF control.

HOFF, L.T.

2005-10-10T23:59:59.000Z

151

FEATURE ARTICLE Pipeline Corrosion  

E-Print Network [OSTI]

F FEATURE ARTICLE Pipeline Corrosion Issues Related to Carbon Capture, Transportation, and Storage Capture, Transportation, and Storage--Aspects of Corrosion and Materials. "Until these new technologies are developed and applied, corrosion engineers are focusing on how to best design pipelines for CO2 transport

Botte, Gerardine G.

152

Visual Navigation Visual Features  

E-Print Network [OSTI]

: translation rotation scale, and illumination 6 #12;2 Many detectors and descriptors Detectors Harris directions. Such points can be detected by examining the structure tensor (2x2 matrix of local intensity: Scale-Invariant Feature Transform SIFT Keypoints local intensity extrema (minima or maxima) in both

Zhang, Hong

153

PDP-11 front-end for a VAX-11/780  

SciTech Connect (OSTI)

An unpublicized feature of the VAX-11/780 is the provision for attaching a PDP-11 to the VAX UNIBUS Adapter. Doing this can give significantly improved I/O performance for applications which are limited by overhead in the VAX I/O driver rather than by the transfer speed of the UNIBUS itself. Such a system was implemented by using a PDP-11/04 as a front-end to a CAMAC data acquisition system. Both the PDP and the VAX have full access to the UNIBUS. That portion of the PDP address space that does not have UNIBUS memory can be mapped to buffers in the VAX memory; this approach allows the PDP to access VAX memory and to initiate DMA transfers directly to the VAX. The VAX also has full access to the PDP memory; a convenient means for developing and downloading the PDP software is thus provided. 5 figures.

Browne, M.J.; Granieri, C.; Sherden, D.J.; Weaver, L.J.

1980-01-01T23:59:59.000Z

154

Gauge/Gravity Duality and Hadron Physics at the Light-Front  

SciTech Connect (OSTI)

We discuss some remarkable features of the light-front holographic mapping of classical gravity in anti-de Sitter space modified by a confining dilaton background. In particular, we show that a positive-sign dilaton solution exp(+{kappa}{sup 2}z{sup 2}) has better chances to describe the correct hadronic phenomenology than the negative solution exp(-{kappa}{sup 2}z{sup 2}) extensively studied in the literature. We also show that the use of twist-scaling dimensions, instead of canonical dimensions, is required to give a good description of the spectrum and form factors of hadrons. Another key element is the explicit connection of AdS modes of total angular momentum J with the internal structure of hadrons and the proper identification of the orbital angular momentum of the constituents.

Teramond, Guy F. de [Universidad de Costa Rica, San Jose (Costa Rica); Brodsky, Stanley J. [SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94309, USA and CP3-Origins, University of Southern Denmark, Odense, 5230 M (Denmark)

2010-11-12T23:59:59.000Z

155

Development of RF CMOS receiver front-ends for ultrawideband  

E-Print Network [OSTI]

demonstrates two different solutions for the RF front-end designs in the UWB receivers, one is distributed topology, and the other is based on traditional lumped element topology. The distributed amplifier is one of the attractive candidates for UWB Low Noise...

Guan, Xin

2009-05-15T23:59:59.000Z

156

Neutrino factory front-end: muon capture and cooling optimization  

E-Print Network [OSTI]

The neutrino factory is one of the designs proposed for a future intense neutrino beam facility. The layout discussed here focuses on the front-end of the current baseline. The challenges inherent to the cooling of muons are shown together with possible baseline optimization.

Prior, G

2010-01-01T23:59:59.000Z

157

INTERNAL GRAVITY WAVES FROM ATMOSPHERIC JETS AND FRONTS  

E-Print Network [OSTI]

INTERNAL GRAVITY WAVES FROM ATMOSPHERIC JETS AND FRONTS Riwal Plougonven1 and Fuqing Zhang2 consistently highlighted jet exit regions as a favored locus for intense gravity waves, the mechanisms need for improving parameterizations of nonorographic gravity waves in climate models that include

Plougonven, Riwal

158

Geodesic Remeshing Using Front Propagation Gabriel Peyre Laurent Cohen  

E-Print Network [OSTI]

Geodesic Remeshing Using Front Propagation Gabriel Peyr´e Laurent Cohen CMAP CEREMADE, UMR CNRS, we present a method for remeshing trian- gulated manifolds by using geodesic path calculations is automatically found. A geodesic Delaunay triangulation of the set of points is then created, using a Voronoi

Paris-Sud XI, Université de

159

A FRONT TRACKING METHOD FOR TRANSITIONAL SHOCK WAVES  

E-Print Network [OSTI]

A FRONT TRACKING METHOD FOR TRANSITIONAL SHOCK WAVES HYUN­CHEOL HWANG Abstract. Non of transitional shock waves, which are dependent on the parabolic regularization of the conservation laws transitional shock waves correctly. The algorithm includes the computation of saddle­to­saddle connec­ tions

New York at Stoney Brook, State University of

160

Utility theory front to back inferring utility from agents' choices  

E-Print Network [OSTI]

Utility theory front to back ­ inferring utility from agents' choices A. M. G. Cox Dept to utility theory and consumption & investment problems. Instead of specifying an agent's utility function) and ask if it is possible to derive a utility function for which the observed behaviour is optimal. We

Note: This page contains sample records for the topic "features front wheel" 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

Actin polymerization front propagation in a comb-reaction system  

E-Print Network [OSTI]

Anomalous transport and reaction dynamics are considered by providing the theoretical grounds for the possible experimental realization of actin polymerization in comb-like geometry. Two limiting regimes are recovered, depending on the concentration of reagents (magnesium and actin). These are both the failure of the reaction front propagation and a finite speed corresponding to the Fisher-KPP long time asymptotic regime.

Iomin, A; Pfohl, T

2015-01-01T23:59:59.000Z

162

Front and backside processed thin film electronic devices  

DOE Patents [OSTI]

This invention provides thin film devices that have been processed on their front- and backside. The devices include an active layer that is sufficiently thin to be mechanically flexible. Examples of the devices include back-gate and double-gate field effect transistors, double-sided bipolar transistors and 3D integrated circuits.

Evans, Paul G. (Madison, WI); Lagally, Max G. (Madison, WI); Ma, Zhenqiang (Middleton, WI); Yuan, Hao-Chih (Lakewood, CO); Wang, Guogong (Madison, WI); Eriksson, Mark A. (Madison, WI)

2012-01-03T23:59:59.000Z

163

Front and backside processed thin film electronic devices  

DOE Patents [OSTI]

This invention provides methods for fabricating thin film electronic devices with both front- and backside processing capabilities. Using these methods, high temperature processing steps may be carried out during both frontside and backside processing. The methods are well-suited for fabricating back-gate and double-gate field effect transistors, double-sided bipolar transistors and 3D integrated circuits.

Yuan, Hao-Chih (Madison, WI); Wang, Guogong (Madison, WI); Eriksson, Mark A. (Madison, WI); Evans, Paul G. (Madison, WI); Lagally, Max G. (Madison, WI); Ma, Zhenqiang (Middleton, WI)

2010-10-12T23:59:59.000Z

164

Flame front tracking by laser induced fluorescence spectroscopy and advanced  

E-Print Network [OSTI]

surface characteristics in turbulent premixed propane/air combustion," Combustion and Flame 120(4), 407 References and links 1. J. Warnatz, U. Maas, and R.W. Dibble, Combustion - physical and chemical fundamentals, "Characterization of flame front surfaces in turbulent premixed methane/air combustion," Combustion and Flame 101

Hamarneh, Ghassan

165

Front Vehicle Blind Spot Translucentization Based on Augmented Reality  

E-Print Network [OSTI]

Front Vehicle Blind Spot Translucentization Based on Augmented Reality Che-Tsung Lin, Yu-Chen Lin--Recently, WAVE/DSRC has become an attrac- tive technology for vehicular safety applications. Vehicles with WAVE/DSRC devices can communicate with their neighboring vehicles to exchange information to achieve collaborative

Wang, Yuan-Fang

166

Multimaterial Front Tracking Fang Da, Christopher Batty, and Eitan Grinspun  

E-Print Network [OSTI]

.8 [Simulation and Modeling]: Types of Simulation--Animation Additional Key Words and Phrases: front tracking. Numerous additional physical and mathemat- ical applications have this same form: soap bubbles and dry the space of possible entangled mesh configurations that can arise, and topological transformations

167

"It's Like Giving Us a Car, Only Without the Wheels": Performance of Latina Students at an Early College High School  

E-Print Network [OSTI]

School. (December 2011) Leslie Ann Locke, B.S.; M.L.S, University of Minnesota?Twin Cities Chair of Advisory Committee: Dr. Kathryn McKenzie This dissertation presents the results from an empirical study of the perspectives of Latina students who... ?IT?S LIKE GIVING US A CAR, ONLY WITHOUT THE WHEELS?: PERFORMANCE OF LATINA STUDENTS AT AN EARLY COLLEGE HIGH SCHOOL A Dissertation by LESLIE ANN LOCKE Submitted to the Office of Graduate Studies of Texas A&M University...

Locke, Leslie Ann

2012-02-14T23:59:59.000Z

168

Improved Reliability of PV Modules with Lexan PC Sheet-Front...  

Broader source: Energy.gov (indexed) [DOE]

Improved Reliability of PV Modules with Lexan PC Sheet-Front Sheet, Noryl PPE Sheet-Back Sheet Improved Reliability of PV Modules with Lexan PC Sheet-Front Sheet, Noryl PPE...

169

Improved Reliability of PV Modules with Lexan PC Sheet-Front...  

Broader source: Energy.gov (indexed) [DOE]

IMPROVED RELIABILITY OF PV MODULES WITH LEXAN(tm) (PC ) SHEET - FRONT SHEET NORYL(tm) (PPE) SHEET - BACK SHEET NORYL(tm) Sheet for back sheet application LEXAN(tm) sheet for front...

170

E-Print Network 3.0 - adaptive optics wave-front Sample Search...  

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

Powered by Explorit Topic List Advanced Search Sample search results for: adaptive optics wave-front Page: << < 1 2 3 4 5 > >> 1 Wave-front generation of Zernike polynomial...

171

Feature Stories | ORNL  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4:Epitaxial ThinFORFALL NEWS ROCKY MOUNTAINFastFeature Stories News

172

Licensing Uncertain Patents: Per-Unit Royalty vs. Up-Front Fee  

E-Print Network [OSTI]

Licensing Uncertain Patents: Per-Unit Royalty vs. Up-Front Fee David Encaouay and Yassine Lefouiliz schemes are investigated: the per-unit royalty rate and the up-front fee. We provide conditions under-unit royalty scheme, the opportunity to do so does not exist under the up-front fee scheme. We also establish

Boyer, Edmond

173

Introduction Idealized Moist Jet/Front Waves Ray Tracing Momentum Flux/Forcing Conclusion Gravity Waves  

E-Print Network [OSTI]

Introduction Idealized Moist Jet/Front Waves Ray Tracing Momentum Flux/Forcing Conclusion Gravity Waves in Moist Baroclinic Jet-Front Systems Junhong Wei, Fuqing Zhang Department of Meteorology The Pennsylvania State University Tuesday 19th August, 2014 #12;Introduction Idealized Moist Jet/Front Waves Ray

Thompson, Anne

174

Massively Parallel Computation of Sti Propagating Combustion frontsMarc Garbey and Damien Tromeur-Dervout  

E-Print Network [OSTI]

In this paper we study the computation of combustion fronts using MIMD archi- tecture. Our applications in gas models of combustion fronts: rst, a classical thermo-di usive model describing the combustion of a gasMassively Parallel Computation of Sti Propagating Combustion frontsMarc Garbey and Damien Tromeur

Garbey, Marc

175

Physics design of front ends for superconducting ion linacs  

SciTech Connect (OSTI)

Superconducting (SC) technology is the only option for CW linacs and is also an attractive option for pulsed linacs. SC cavities are routinely used for proton and H{sup -} beam acceleration above 185 MeV. Successful development of SC cavities covering the lower velocity range (down to 0.03c) is a very strong basis for the application of SC structures in the front ends of high energy linacs. Lattice design and related high-intensity beam physics issues in a {approx}400 MeV linac that uses SC cavities will be presented in this talk. In particular, axially-symmetric focusing by SC solenoids provides strong control of beam space-charge and a compact focusing lattice. As an example, we discuss the SC front-end of the H{sup -} linac for the FNAL Proton Driver.

Ostroumov, P.N.; /Argonne; Carneiro, J.P.; /Fermilab

2009-01-01T23:59:59.000Z

176

Physics design of front ends for superconducting ion linacs  

SciTech Connect (OSTI)

Superconducting (SC) technology is the only option for CW linacs and is also an attractive option for pulsed linacs. SC cavities are routinely used for proton and H{sup -} beam acceleration above 185 MeV. Successful development of SC cavities covering the lower velocity range (down to 0.03c) is a very strong basis for the application of SC structures in the front ends of high energy linacs. Lattice design and related high-intensity beam physics issues in a {approx}400 MeV linac that uses SC cavities will be presented in this talk. In particular, axially-symmetric focusing by SC solenoids provides strong control of beam space charge and a compact focusing lattice. As an example, we discuss the SC front end of the H{sup -} linac for the FNAL Proton Driver.

Ostroumov, P.N.; /Argonne; Carneiro, J.-P.; /Fermilab

2008-09-01T23:59:59.000Z

177

Tracking thermal fronts with temperature-sensitive, chemically reactive tracers  

SciTech Connect (OSTI)

Los Alamos is developing tracer techniques using reactive chemicals to track thermal fronts in fractured geothermal reservoirs. If a nonadsorbing tracer flowing from the injection to production well chemically reacts, its reaction rate will be a strong function of temperature. Thus the extent of chemical reaction will be greatest early in the lifetime of the system, and less as the thermal front progresses from the injection to production well. Early laboratory experiments identified tracers with chemical kinetics suitable for reservoirs in the temperature range of 75 to 100/sup 0/C. Recent kinetics studies have focused on the kinetics of hydrolysis of derivatives of bromobenzene. This class of reactions can be used in reservoirs ranging in temperature from 150 to 275/sup 0/C, which is of greater interest to the geothermal industry. Future studies will include laboratory adsorption experiments to identify possibly unwanted adsorption on granite, development of sensitive analytical techniques, and a field demonstration of the reactive tracer concept.

Robinson, B.A.; Birdsell, S.A.

1987-01-01T23:59:59.000Z

178

Ionization front-driven turbulence in the clumpy interstellar medium  

E-Print Network [OSTI]

We present 3D radiation-gasdynamical simulations of an ionization front running into a dense clump. In our setup, a B0 star irradiates an overdensity which is at a distance of 10 pc and modelled as a supercritical 100 M_sol Bonnor-Ebert sphere. The radiation from the star heats up the gas and creates a shock front that expands into the interstellar medium. The shock compresses the clump material while the ionizing radiation heats it up. The outcome of this "cloud-crushing" process is a fully turbulent gas in the wake of the clump. In the end, the clump entirely dissolves. We propose that this mechanism is very efficient in creating short-living supersonic turbulence in the vicinity of massive stars.

Thomas Peters; Robi Banerjee; Ralf S. Klessen

2008-08-20T23:59:59.000Z

179

Towards the Light Front Variables for High Energy Production Processes  

E-Print Network [OSTI]

Scale invariant presentation of inclusive spectra in terms of light front variables is proposed. The variables introduced go over to the well-known scaling variables x_F = 2p_z/sqrt(s) and x_T=2p_T/sqrt{s} in the high p_z and high p_T limits respectively. So Some surface is found in the phase space of produced pi-mesons in the inclusive reaction anti p p -> pi+- X at 22.4 GeV/c, which separates two groups of particles with significantly different characteristics. In one of these regions a naive statistical model seems to be in a good agreement with data, whereas it fails in the second region. Key words: Light front, inclusive, hadron-hadron, electron-positron, relativistic heavy ions, deep inelastic.

N. S. Amaglobeli; S. M. Esakia; V. R. Garsevanishvili; G. O. Kuratashvili; N. K. Kutsidi; R. A. Kvatadze; Yu V. Tevzadze; T. P. Topuria

1997-03-21T23:59:59.000Z

180

Epidemic fronts in complex networks with metapopulation structure  

E-Print Network [OSTI]

Infection dynamics have been studied extensively on complex networks, yielding insight into the effects of heterogeneity in contact patterns on disease spread. Somewhat separately, metapopulations have provided a paradigm for modeling systems with spatially extended and "patchy" organization. In this paper we expand on the use of multitype networks for combining these paradigms, such that simple contagion models can include complexity in the agent interactions and multiscale structure. We first present a generalization of the Volz-Miller mean-field approximation for Susceptible-Infected-Recovered (SIR) dynamics on multitype networks. We then use this technique to study the special case of epidemic fronts propagating on a one-dimensional lattice of interconnected networks - representing a simple chain of coupled population centers - as a necessary first step in understanding how macro-scale disease spread depends on micro-scale topology. Using the formalism of front propagation into unstable states, we derive ...

Hindes, Jason; Myers, Christopher R; Schneider, David J

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

Towards the Light Front Variables for High Energy Production Processes  

E-Print Network [OSTI]

Scale invariant presentation of inclusive spectra in terms of light front variables is proposed. The variables introduced go over to the well-known scaling variables x_F = 2p_z/sqrt(s) and x_T=2p_T/sqrt{s} in the high p_z and high p_T limits respectively. So Some surface is found in the phase space of produced pi-mesons in the inclusive reaction anti p p -> pi+- X at 22.4 GeV/c, which separates two groups of particles with significantly different characteristics. In one of these regions a naive statistical model seems to be in a good agreement with data, whereas it fails in the second region. Key words: Light front, inclusive, hadron-hadron, electron-positron, relativistic heavy ions, deep inelastic.

Amaglobeli, N S; Garsevanishvili, V R; Kuratashvili, G O; Kutsidi, N K; Kvatadze, R A; Tevzadze, Yu V; Topuria, T P; Tevzadze, Yu V.

1998-01-01T23:59:59.000Z

182

SciFeatureSciFeature SEA-MONKEYS AND ALIENS?  

E-Print Network [OSTI]

SciFeatureSciFeature MSU SEA-MONKEYS® AND ALIENS? What is the connection between Sea-Monkeys® and aliens? Believe it or not NASA scientists think it is possible that some alien life might resemble Sea

183

Well-to-wheels analysis of fast pyrolysis pathways with the GREET model.  

SciTech Connect (OSTI)

The pyrolysis of biomass can help produce liquid transportation fuels with properties similar to those of petroleum gasoline and diesel fuel. Argonne National Laboratory conducted a life-cycle (i.e., well-to-wheels [WTW]) analysis of various pyrolysis pathways by expanding and employing the Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation (GREET) model. The WTW energy use and greenhouse gas (GHG) emissions from the pyrolysis pathways were compared with those from the baseline petroleum gasoline and diesel pathways. Various pyrolysis pathway scenarios with a wide variety of possible hydrogen sources, liquid fuel yields, and co-product application and treatment methods were considered. At one extreme, when hydrogen is produced from natural gas and when bio-char is used for process energy needs, the pyrolysis-based liquid fuel yield is high (32% of the dry mass of biomass input). The reductions in WTW fossil energy use and GHG emissions relative to those that occur when baseline petroleum fuels are used, however, is modest, at 50% and 51%, respectively, on a per unit of fuel energy basis. At the other extreme, when hydrogen is produced internally via reforming of pyrolysis oil and when bio-char is sequestered in soil applications, the pyrolysis-based liquid fuel yield is low (15% of the dry mass of biomass input), but the reductions in WTW fossil energy use and GHG emissions are large, at 79% and 96%, respectively, relative to those that occur when baseline petroleum fuels are used. The petroleum energy use in all scenarios was restricted to biomass collection and transportation activities, which resulted in a reduction in WTW petroleum energy use of 92-95% relative to that found when baseline petroleum fuels are used. Internal hydrogen production (i.e., via reforming of pyrolysis oil) significantly reduces fossil fuel use and GHG emissions because the hydrogen from fuel gas or pyrolysis oil (renewable sources) displaces that from fossil fuel natural gas and the amount of fossil natural gas used for hydrogen production is reduced; however, internal hydrogen production also reduces the potential petroleum energy savings (per unit of biomass input basis) because the fuel yield declines dramatically. Typically, a process that has a greater liquid fuel yield results in larger petroleum savings per unit of biomass input but a smaller reduction in life-cycle GHG emissions. Sequestration of the large amount of bio-char co-product (e.g., in soil applications) provides a significant carbon dioxide credit, while electricity generation from bio-char combustion provides a large energy credit. The WTW energy and GHG emissions benefits observed when a pyrolysis oil refinery was integrated with a pyrolysis reactor were small when compared with those that occur when pyrolysis oil is distributed to a distant refinery, since the activities associated with transporting the oil between the pyrolysis reactors and refineries have a smaller energy and emissions footprint than do other activities in the pyrolysis pathway.

Han, J.; Elgowainy, A.; Palou-Rivera, I.; Dunn, J.B.; Wang, M.Q. (Energy Systems)

2011-12-01T23:59:59.000Z

184

Adaptive two-regime method: Application to front propagation  

SciTech Connect (OSTI)

The Adaptive Two-Regime Method (ATRM) is developed for hybrid (multiscale) stochastic simulation of reaction-diffusion problems. It efficiently couples detailed Brownian dynamics simulations with coarser lattice-based models. The ATRM is a generalization of the previously developed Two-Regime Method [Flegg et al., J. R. Soc., Interface 9, 859 (2012)] to multiscale problems which require a dynamic selection of regions where detailed Brownian dynamics simulation is used. Typical applications include a front propagation or spatio-temporal oscillations. In this paper, the ATRM is used for an in-depth study of front propagation in a stochastic reaction-diffusion system which has its mean-field model given in terms of the Fisher equation [R. Fisher, Ann. Eugen. 7, 355 (1937)]. It exhibits a travelling reaction front which is sensitive to stochastic fluctuations at the leading edge of the wavefront. Previous studies into stochastic effects on the Fisher wave propagation speed have focused on lattice-based models, but there has been limited progress using off-lattice (Brownian dynamics) models, which suffer due to their high computational cost, particularly at the high molecular numbers that are necessary to approach the Fisher mean-field model. By modelling only the wavefront itself with the off-lattice model, it is shown that the ATRM leads to the same Fisher wave results as purely off-lattice models, but at a fraction of the computational cost. The error analysis of the ATRM is also presented for a morphogen gradient model.

Robinson, Martin, E-mail: martin.robinson@maths.ox.ac.uk; Erban, Radek, E-mail: erban@maths.ox.ac.uk [Mathematical Institute, University of Oxford, Andrew Wiles Building, Radcliffe Observatory Quarter, Woodstock Road, Oxford OX2 6GG (United Kingdom)] [Mathematical Institute, University of Oxford, Andrew Wiles Building, Radcliffe Observatory Quarter, Woodstock Road, Oxford OX2 6GG (United Kingdom); Flegg, Mark, E-mail: mark.flegg@monash.edu [School of Mathematical Sciences, Faculty of Science, Monash University Wellington Road, Clayton, Victoria 3800 (Australia)] [School of Mathematical Sciences, Faculty of Science, Monash University Wellington Road, Clayton, Victoria 3800 (Australia)

2014-03-28T23:59:59.000Z

185

A turnstile mechanism for fronts propagating in fluid flows  

E-Print Network [OSTI]

We consider the propagation of fronts in a periodically driven flowing medium. It is shown that the progress of fronts in these systems may be mediated by a turnstile mechanism akin to that found in chaotic advection. We first define the modified ("active") turnstile lobes according to the evolution of point sources across a transport boundary. We then show that the lobe boundaries may be constructed from stable and unstable \\emph{burning invariant manifolds}---one-way barriers to front propagation analogous to traditional invariant manifolds for passive advection. Because the burning invariant manifolds (BIMs) are one-dimensional curves in a three-dimensional ($xy\\theta$) phase space, their projection into $xy$-space exhibits several key differences from their advective counterparts: (lobe) areas are not preserved, BIMs may self-intersect, and an intersection between stable and unstable BIMs does not map to another such intersection. These differences must be accommodated in the correct construction of the new turnstile. As an application, we consider a lobe-based treatment protocol for protecting an ocean bay from an invading algae bloom.

John R. Mahoney; Kevin A. Mitchell

2013-05-22T23:59:59.000Z

186

A Life Cycle Assessment of a Magnesium Automotive Front End  

SciTech Connect (OSTI)

The Magnesium Front End Research and Development (MFERD) project under the sponsorship of Canada, China and USA aims to develop key technologies and a knowledge base for increased use of magnesium in automobile. The goal of this life cycle assessment (LCA) study is to compare the energy and potential environmental impacts of advanced magnesium based front end parts of a North America built 2007 GM-Cadillac CTS with the standard carbon steel based design. This LCA uses the 'cradle-to-grave' approach by including primary material production, semi-fabrication production, autoparts manufacturing and assembly, transportation, use phase and end-of-life processing of autoparts. This LCA study was done in compliance with international standards ISO 14040:2006 and ISO 14044:2006. Furthermore, the LCA results for aluminum based front end autopart are presented. While weight savings result in reductions in energy use and carbon dioxide emissions during the use of the car, the impacts of fabrication and recycling of lightweight materials are substantial in regard to steel. Pathways for improving sustainability of magnesium use in automobiles through material management and technology improvements including recycling are also discussed.

Das, Sujit [ORNL; Dubreuil, Alain [Natural Resources Canada; Bushi, Lindita [GreenhouseGasMeasurement.com; Tharumarajah, Ambalavanar [CSIRO/CAST-CRC

2009-01-01T23:59:59.000Z

187

Well-to-Wheel Energy, Emissions, and Cost Analysis of Electricity and Fuel Used in Conventional and Electrified Vehicles, and Their Connection to a Sustainable Energy Infrastructure  

E-Print Network [OSTI]

produced in creating the electricity through a full Life Cycle Analysis. As a result, proper comparison of electrified and conventional vehicles must include a complete Well-to-Wheel (WtW) study including the emissions generated through production and use...

Strecker, Bryan Anthony

2012-12-31T23:59:59.000Z

188

How to Properly Secure Your Bicycle Make sure the U-lock passes through the center of the frame as well as both wheels!  

E-Print Network [OSTI]

How to Properly Secure Your Bicycle Make sure the U-lock passes through the center of the frame as well as both wheels! Improperly Securing & Locking Your Bicycle Makes It an Easy Target for Thieves and seats Most thefts of bicycles occur because the lock being used is either a cable lock

Blanchette, Robert A.

189

Front surface thermal property measurements of air plasma spray coatings  

SciTech Connect (OSTI)

A front-surface measurement for determining the thermal properties of thermal barrier coatings has been applied to air plasma spray coatings. The measurement is used to determine all independent thermal properties of the coating simultaneously. Furthermore, with minimal requirements placed on the sample and zero sample preparation, measurements can be made under previously impossible conditions, such as on serviceable engine parts. Previous application of this technique was limited to relatively thin coatings, where a one-dimensional heat transfer model is applied. In this paper, the influence of heat spreading on the measurement of thicker coatings is investigated with the development of a two-dimensional heat transfer model.

Bennett, Ted; Kakuda, Tyler [University of California, Santa Barbara, California 93106-5070 (United States); Kulkarni, Anand [Siemens Energy, Orlando, Florida 32826-2399 (United States)

2009-04-15T23:59:59.000Z

190

Automatic signal processing of front monitor radar for tunneling machines  

SciTech Connect (OSTI)

It is planned to install a front monitoring impulse radar on the surface of the rotating drill of tunneling machines in order to detect obstacles such as casing pipes of vertical borings. The conventional aperture synthesis technique can no more be applied to such cases because the radar image of a pipe dies not constituent a hyperbola as is the case for linear scanning radars. The authors have developed a special purpose signal processing algorithm with the aid of the discrete model fitting method, which can be used for any pattern of scanning. The details of the algorithm are presented together with the results of numerical simulations and test site experiments.

Sato, Toru [Kyoto Univ. (Japan). Dept. of Electronics and Communication] [Kyoto Univ. (Japan). Dept. of Electronics and Communication; Takeda, Kenya [NTT Co. Ltd., Chiba (Japan)] [NTT Co. Ltd., Chiba (Japan); Nagamatsu, Takashi [Mitsubishi Heavy Industries, Ltd., Tokyo (Japan)] [Mitsubishi Heavy Industries, Ltd., Tokyo (Japan); Wakayama, Toshio [Mitsubishi Electric Corp., Kamakura, Kanagawa (Japan)] [Mitsubishi Electric Corp., Kamakura, Kanagawa (Japan); Kimura, Iwane [Osaka Inst. of Tech., Hirakata, Osaka (Japan)] [Osaka Inst. of Tech., Hirakata, Osaka (Japan); Shinbo, Tetsuya [Komatsu Co. Ltd., Kanagawa (Japan)] [Komatsu Co. Ltd., Kanagawa (Japan)

1997-03-01T23:59:59.000Z

191

BLM Sierra Front Field Office | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectricEnergyCT BiomassArnprior,Aurantia SACitas JumpCenter JumpSensitiveFront

192

New RPC front-end electronics for hades  

E-Print Network [OSTI]

Time-of-flight (TOF) detectors are mainly used for both particle identification and triggering. Resistive Plate Chamber (RPC) detectors are becoming widely used because of their excellent TOF capabilities and reduced cost. The new ESTRELA* RPC wall, which is being installed in the HADES detector at Darmstadt GSI, will contain 1024 RPC modules, covering an active area of around 7 m2. It has excellent TOF and good charge resolutions. Its Front-End electronics is based on a 8-layer Mother-Board providing impedance matched paths for the output signals of each of the eight 4-channel Daughter-Boards to the TDC.

Gil, Alejandro; Cabanelas, P; Daz, J; Garzn, J A; Gonzlez-Daz, D; Knig, W; Lange, J S; Marn, J; Montes, N; Skott, P; Traxler, M

2007-01-01T23:59:59.000Z

193

The dynamics of combustion fronts in porous media  

SciTech Connect (OSTI)

In this report, a method for solving this problem by treating the reaction region as a place of discontinuities in the appropriate variables, which include, for example, fluxes of heat and mass was proposed. Using a rigorous perturbation approach, similar to that used in the propagation of flames and smoldering combustion, appropriate jump conditions that relate the change in these variables across the front was derived. These conditions account for the kinetics of the reaction between the oxidant and the fuel, the changes in the morphology of the pore space and the heat and mass transfer in the reaction zone. The modeling of the problem reduces to the modeling of the dynamics of a combustion front, on the regions of either side of which transport of momentum (fluids), heat and mass, but not chemical reactions, must be considered. Properties of the two regions are coupled using the derived jump conditions. This methodology allows one to explicitly incorporate permeability heterogeneity effects in the process description, without the undue complexity of the coupled chemical reactions.

Akkutlu, I. Yucel; Yortsos, Yannis C.

2000-06-15T23:59:59.000Z

194

Basic features of the pion valence-quark distribution function  

E-Print Network [OSTI]

The impulse-approximation expression used hitherto to define the pion's valence-quark distribution function is flawed because it omits contributions from the gluons which bind quarks into the pion. A corrected leading-order expression produces the model-independent result that quarks dressed via the rainbow-ladder truncation, or any practical analogue, carry all the pion's light-front momentum at a characteristic hadronic scale. Corrections to the leading contribution may be divided into two classes, responsible for shifting dressed-quark momentum into glue and sea-quarks. Working with available empirical information, we use an algebraic model to express the principal impact of both classes of corrections. This enables a realistic comparison with experiment that allows us to highlight the basic features of the pion's measurable valence-quark distribution, $q^\\pi(x)$; namely, at a characteristic hadronic scale, $q^\\pi(x) \\sim (1-x)^2$ for $x\\gtrsim 0.85$; and the valence-quarks carry approximately two-thirds of the pion's light-front momentum.

Lei Chang; Cdric Mezrag; Herv Moutarde; Craig D. Roberts; Jose Rodrguez-Quintero; Peter C. Tandy

2014-06-20T23:59:59.000Z

195

Pion light-front wave function, parton distribution and the electromagnetic form factor  

E-Print Network [OSTI]

We derive a light-front wave function of the pion, which reproduces its valence parton distribution and a electromagnetic form factor consistent with data.

Thomas Gutsche; Valery E. Lyubovitskij; Ivan Schmidt; Alfredo Vega

2014-10-23T23:59:59.000Z

196

E-Print Network 3.0 - automobile front panel Sample Search Results  

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

Search Powered by Explorit Topic List Advanced Search Sample search results for: automobile front panel Page: << < 1 2 3 4 5 > >> 1 FUTURES OF AUTOMOBILE INDUSTRY AND...

197

E-Print Network 3.0 - atlas front-end links Sample Search Results  

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

on behalf of the ATLAS collaboration Summary: and TILES calorimeters: All in the cavern, Barrel LARG cryostat is cold, Barrel Front end electronics all... . Perrodo Detector...

198

E-Print Network 3.0 - atlas pixel front-end Sample Search Results  

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

on behalf of the ATLAS collaboration Summary: and TILES calorimeters: All in the cavern, Barrel LARG cryostat is cold, Barrel Front end electronics all... . Perrodo Detector...

199

Well-to-Wheels analysis of landfill gas-based pathways and their addition to the GREET model.  

SciTech Connect (OSTI)

Today, approximately 300 million standard cubic ft/day (mmscfd) of natural gas and 1600 MW of electricity are produced from the decomposition of organic waste at 519 U.S. landfills (EPA 2010a). Since landfill gas (LFG) is a renewable resource, this energy is considered renewable. When used as a vehicle fuel, compressed natural gas (CNG) produced from LFG consumes up to 185,000 Btu of fossil fuel and generates from 1.5 to 18.4 kg of carbon dioxide-equivalent (CO{sub 2}e) emissions per million Btu of fuel on a 'well-to-wheel' (WTW) basis. This compares with approximately 1.1 million Btu and 78.2 kg of CO{sub 2}e per million Btu for CNG from fossil natural gas and 1.2 million Btu and 97.5 kg of CO{sub 2}e per million Btu for petroleum gasoline. Because of the additional energy required for liquefaction, LFG-based liquefied natural gas (LNG) requires more fossil fuel (222,000-227,000 Btu/million Btu WTW) and generates more GHG emissions (approximately 22 kg CO{sub 2}e /MM Btu WTW) if grid electricity is used for the liquefaction process. However, if some of the LFG is used to generate electricity for gas cleanup and liquefaction (or compression, in the case of CNG), vehicle fuel produced from LFG can have no fossil fuel input and only minimal GHG emissions (1.5-7.7 kg CO{sub 2}e /MM Btu) on a WTW basis. Thus, LFG-based natural gas can be one of the lowest GHG-emitting fuels for light- or heavy-duty vehicles. This report discusses the size and scope of biomethane resources from landfills and the pathways by which those resources can be turned into and utilized as vehicle fuel. It includes characterizations of the LFG stream and the processes used to convert low-Btu LFG into high-Btu renewable natural gas (RNG); documents the conversion efficiencies and losses of those processes, the choice of processes modeled in GREET, and other assumptions used to construct GREET pathways; and presents GREET results by pathway stage. GREET estimates of well-to-pump (WTP), pump-to-wheel (PTW), and WTW energy, fossil fuel, and GHG emissions for each LFG-based pathway are then summarized and compared with similar estimates for fossil natural gas and petroleum pathways.

Mintz, M.; Han, J.; Wang, M.; Saricks, C.; Energy Systems

2010-06-30T23:59:59.000Z

200

Entangled topological features of light  

E-Print Network [OSTI]

We report the entanglement of topological features, namely, isolated, linked optical vortex loops in the light from spontaneous parametric down-conversion (SPDC). In three dimensions, optical vortices are lines of phase singularity and vortices of energy flow which percolate through all optical fields. This example of entanglement is between features that extend over macroscopic and finite volumes, furthermore, topological features are robust to perturbation . The entanglement of photons in complex three-dimensional(3D) topological states suggests the possibility of entanglement of similar structures in other quantum systems describable by complex scalar functions, such as superconductors, superfluids and Bose-Einstein condensates.

J. Romero; J. Leach; B. Jack; M. R. Dennis; S. Franke-Arnold; S. M. Barnett; M. J. Padgett

2010-08-26T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

In-plane ultrasonic velocity measurement of longitudinal and shear waves in the machine direction with transducers in rotating wheels  

DOE Patents [OSTI]

An improved system for measuring the velocity of ultrasonic signals within the plane of moving web-like materials, such as paper, paperboard and the like. In addition to velocity measurements of ultrasonic signals in the plane of the web in the MD and CD, one embodiment of the system in accordance with the present invention is also adapted to provide on-line indication of the polar specific stiffness of the moving web. In another embodiment of the invention, the velocity of ultrasonic signals in the plane of the web are measured by way of a plurality of ultrasonic transducers carried by synchronously driven wheels or cylinders, thus eliminating undue transducer wear due to any speed differences between the transducers and the web. In order to provide relatively constant contact force between the transducers and the webs, the transducers are mounted in a sensor housings which include a spring for biasing the transducer radially outwardly. The sensor housings are adapted to be easily and conveniently mounted to the carrier to provide a relatively constant contact force between the transducers and the moving web. 37 figs.

Hall, M.S.; Jackson, T.G.; Knerr, C.

1998-02-17T23:59:59.000Z

202

Wave Front Interaction Model of Stabilized Propagating Wave Segments Vladimir S. Zykov1  

E-Print Network [OSTI]

Wave Front Interaction Model of Stabilized Propagating Wave Segments Vladimir S. Zykov1 and Kenneth; published 14 February 2005) A wave front interaction model is developed to describe the relationship between excitability and the size and shape of stabilized wave segments in a broad class of weakly excitable media

Showalter, Kenneth

203

Air-sea interaction at an oceanic front: Implications for frontogenesis and primary production  

E-Print Network [OSTI]

Air-sea interaction at an oceanic front: Implications for frontogenesis and primary production Dake a significant air-sea interaction at the shelf- break front in the East China Sea. An idealized ocean was identified in the model and its consequences were evaluated. We found that air-sea interaction, when combined

Chen, .Dake

204

A Review of Cold Fronts with Prefrontal Troughs and Wind Shifts DAVID M. SCHULTZ  

E-Print Network [OSTI]

A Review of Cold Fronts with Prefrontal Troughs and Wind Shifts DAVID M. SCHULTZ Cooperative with a pressure trough and a distinct wind shift at the surface. Many cold fronts, however, do not conform to this model--time series at a single surface station may possess a pressure trough and wind shift in the warm

Schultz, David

205

The Interruption of Alpine Foehn by a Cold Front. Part I: Observations  

E-Print Network [OSTI]

propagation speed wf 1 m/s Inclination of the frontal surface is wf /uf 1/7.5 8 Freitag (1990 in valleys Interaction with local winds (e.g., foehn) foehn cold front Cold front in complex terrain ? ? #12 in Inn and Wipp Valley Temperature slope profile Doppler wind lidar in Wipp Valley #12;6 of 13 Case study

Gohm, Alexander

206

CISC 327 -Fall 2014 ! Course Project Assignment #1 -Front End Requirements!  

E-Print Network [OSTI]

represent those requirements as a set of requirements tests. The basic idea is to analyze the requirements, and create a test case for each piece. We will study this more in class.! !Create and organize a complete set of requirements tests for the Front End of Quinterac, to test for every required behaviour (of the Front End only

Cordy, James R.

207

Integrated vehicle dynamics control via coordination of active front steering and rear braking  

E-Print Network [OSTI]

Integrated vehicle dynamics control via coordination of active front steering and rear brakingComputer and Automation Research Institue, Hungarian Academy of Sciences, Kende u. 13-17, H-1111, Budapest, Hungary, Email front steering and rear braking in a driver- assist system for vehicle yaw control. The proposed control

Paris-Sud XI, Université de

208

Validity of wave-front reconstruction and propagation of ultrabroadband pulses measured  

E-Print Network [OSTI]

laser pulses from a hollow fiber can be propagated correctly by a single polychromatic wave. © 2005 Optical Society of America OCIS codes: 320.0320, 140.7090. Many experiments in laser physics-front characterization. Beam wave front, spatial irradiance distribution, and coherence properties are needed

Keller, Ursula

209

Fast 3D Brain Segmentation Using Dual-Front Active Contours with Optional User-Interaction  

E-Print Network [OSTI]

Fast 3D Brain Segmentation Using Dual-Front Active Contours with Optional User-Interaction Hua Li1 attributes of 3D brain segmentation algorithms in- clude robustness, accuracy, computational efficiency result. We propose a novel 3D brain cortex segmentation procedure utilizing dual- front active contours

Cohen, Laurent

210

Lattice Boltzmann BGK simulation of non-linear sound waves: The development of a shock front  

E-Print Network [OSTI]

Lattice Boltzmann BGK simulation of non-linear sound waves: The development of a shock front J. M Boltzmannsimulationsofthe development of a shock front are performed when a sound wave is emitted from a high amplitude.1088/0305-4470/33/21/305 #12;Lattice Boltzmann BGK simulation of non-linear sound waves 2 1. Introduction The lattice

Boyer, Edmond

211

Traveling Fronts of Copper Deposition Stephanie Thouvenel-Romans, Konstantin Agladze, and Oliver Steinbock*  

E-Print Network [OSTI]

Traveling Fronts of Copper Deposition Stephanie Thouvenel-Romans, Konstantin Agladze, and Oliver for propagating fronts that mediate the electroless deposition of copper on passivated steel. Under ap- propriate is essentially independent from the copper(II) concentration in the electrolyte, which indicates

Steinbock, Oliver

212

IMA Journal of Applied Mathematics (2002) 67, 419439 Modelling thermal front dynamics in microwave heating  

E-Print Network [OSTI]

an electric field is applied to materials with high resistivity, the dipole moments of the molecules alignIMA Journal of Applied Mathematics (2002) 67, 419­439 Modelling thermal front dynamics in microwave July 2000; revised on 6 December 2001] The formation and propagation of thermal fronts in a cylindrical

Xin, Jack

213

Silicon Solar Cells with Front Hetero-contact and Aluminum Alloy Back Junction (Poster)  

SciTech Connect (OSTI)

The objectives of this report are: (1) to apply industrial back Al process in efficient n-wafer cells with a-Si:H front surface passivation; and (2) to evaluate the surface recombination velocity (SRV) of the a-Si:H passivated front surface with different surface preparation procedures.

Yuan, H.-C.; Page, M. R.; Iwaniczko, E.; Xu, Y.; Roybal, L.; Wang, Q.; Branz, H. M.; Meier, D. L.

2008-05-01T23:59:59.000Z

214

Asymmetry of Columbia River tidal plume fronts David A. Jay a,  

E-Print Network [OSTI]

or northern side and mark a transition from supercritical to subcritical flow for up to 12 h after high water plume water mass. This vorticitycontrols the transition of the tidal plume front to a subcritical state plume may overlie newly upwelled waters, these fronts can mix nutrients into the plume. Symmetry would

Hickey, Barbara

215

Mineral paragenesis and textures associated with sandstone-hosted roll-front uranium deposits, NW China  

E-Print Network [OSTI]

, People's Republic of China c Northwest Institute of Uranium Geology, China National Nuclear CorporationMineral paragenesis and textures associated with sandstone-hosted roll-front uranium deposits, NW, Wuyiyi and Shihongtan sandstone-hosted roll-front uranium deposits, northwest China. The mineralization

Fayek, Mostafa

216

Evidence of uranium biomineralization in sandstone-hosted roll-front uranium deposits, northwestern China  

E-Print Network [OSTI]

Evidence of uranium biomineralization in sandstone-hosted roll-front uranium deposits, northwestern Available online 25 January 2005 Abstract We show evidence that the primary uranium minerals, uraninite-front uranium deposits, Xinjiang, northwestern China were biogenically precipitated and psuedomorphically

Fayek, Mostafa

217

Nature Climate Change features Los  

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

Climate Change features Los Alamos forest research February 27, 2013 New print edition of journal tags tree-stress project for cover story LOS ALAMOS, N.M., Feb. 27, 2013-The print...

218

SiGe receiver front ends and flip-chip integrated wideband antennas for millimeter-wave passive imaging  

E-Print Network [OSTI]

SiGe wideband 77-GHz and 94-GHz front end receivers with integrated antennas for passive imaging have been designed and characterized. These front end systems exhibit wideband performance with the highest gain and lowest ...

Powell, Johnna, 1980-

2009-01-01T23:59:59.000Z

219

Well-to-wheels analysis of energy use and greenhouse gas emissions of plug-in hybrid electric vehicles.  

SciTech Connect (OSTI)

Plug-in hybrid electric vehicles (PHEVs) are being developed for mass production by the automotive industry. PHEVs have been touted for their potential to reduce the US transportation sector's dependence on petroleum and cut greenhouse gas (GHG) emissions by (1) using off-peak excess electric generation capacity and (2) increasing vehicles energy efficiency. A well-to-wheels (WTW) analysis - which examines energy use and emissions from primary energy source through vehicle operation - can help researchers better understand the impact of the upstream mix of electricity generation technologies for PHEV recharging, as well as the powertrain technology and fuel sources for PHEVs. For the WTW analysis, Argonne National Laboratory researchers used the Greenhouse gases, Regulated Emissions, and Energy use in Transportation (GREET) model developed by Argonne to compare the WTW energy use and GHG emissions associated with various transportation technologies to those associated with PHEVs. Argonne researchers estimated the fuel economy and electricity use of PHEVs and alternative fuel/vehicle systems by using the Powertrain System Analysis Toolkit (PSAT) model. They examined two PHEV designs: the power-split configuration and the series configuration. The first is a parallel hybrid configuration in which the engine and the electric motor are connected to a single mechanical transmission that incorporates a power-split device that allows for parallel power paths - mechanical and electrical - from the engine to the wheels, allowing the engine and the electric motor to share the power during acceleration. In the second configuration, the engine powers a generator, which charges a battery that is used by the electric motor to propel the vehicle; thus, the engine never directly powers the vehicle's transmission. The power-split configuration was adopted for PHEVs with a 10- and 20-mile electric range because they require frequent use of the engine for acceleration and to provide energy when the battery is depleted, while the series configuration was adopted for PHEVs with a 30- and 40-mile electric range because they rely mostly on electrical power for propulsion. Argonne researchers calculated the equivalent on-road (real-world) fuel economy on the basis of U.S. Environmental Protection Agency miles per gallon (mpg)-based formulas. The reduction in fuel economy attributable to the on-road adjustment formula was capped at 30% for advanced vehicle systems (e.g., PHEVs, fuel cell vehicles [FCVs], hybrid electric vehicles [HEVs], and battery-powered electric vehicles [BEVs]). Simulations for calendar year 2020 with model year 2015 mid-size vehicles were chosen for this analysis to address the implications of PHEVs within a reasonable timeframe after their likely introduction over the next few years. For the WTW analysis, Argonne assumed a PHEV market penetration of 10% by 2020 in order to examine the impact of significant PHEV loading on the utility power sector. Technological improvement with medium uncertainty for each vehicle was also assumed for the analysis. Argonne employed detailed dispatch models to simulate the electric power systems in four major regions of the US: the New England Independent System Operator, the New York Independent System Operator, the State of Illinois, and the Western Electric Coordinating Council. Argonne also evaluated the US average generation mix and renewable generation of electricity for PHEV and BEV recharging scenarios to show the effects of these generation mixes on PHEV WTW results. Argonne's GREET model was designed to examine the WTW energy use and GHG emissions for PHEVs and BEVs, as well as FCVs, regular HEVs, and conventional gasoline internal combustion engine vehicles (ICEVs). WTW results are reported for charge-depleting (CD) operation of PHEVs under different recharging scenarios. The combined WTW results of CD and charge-sustaining (CS) PHEV operations (using the utility factor method) were also examined and reported. According to the utility factor method, the share of vehicle miles trav

Elgowainy, A.; Han, J.; Poch, L.; Wang, M.; Vyas, A.; Mahalik, M.; Rousseau, A.

2010-06-14T23:59:59.000Z

220

Effect of ninety degree elbow on the accuracy of a non-magnetic, insertion paddle wheel flowmeter  

SciTech Connect (OSTI)

Monitoring energy use in commercial and institutional buildings often requires measurement of chilled and hot water. For retrofit applications, insertion flowmeters are an economical alternative to fixed flow meters such as orifices or venturi meters. The insertion flow meters can be hot tapped into the piping without having to shut down operations. A major problem encountered in retrofit applications of flow meters is finding a location in a pipe where there is at least 10 to 15 diameters of straight pipe. Piping in buildings is constrained by the layout and design of the building, there may only be short runs of straight pipe where flowmeters can be installed. The purpose of this study was to quantify the measurement error caused by installation of flow meter downstream of a 90 degree elbow. The flowmeter was an insertion type, nonmagnetic, paddle wheel flow meter. Meter locations from 2.1 to 9.8 diameters downstream of a 90 degree elbow were studied in a 0.1 in diameter pipe for flow velocities ranging from 0.3 to 3 m/s. At each location downstream of the elbow, the meter was also rotated in 45 increments (from 0 to 180{degree}) around the circumference of the pipe to evaluate choice of circumferential location on flow error. Output from the flowmeter was compared to results obtained with load cells on a 38 m{sup 3} tank that collected the flow pumped through the test section. Results were presented in terms of percent error relative to the load cells as a function of downstream location, circumferential rotation angle, and velocity. The largest errors occurred at 2.1 diameters downstream of the elbow and 180 degree rotation angle. Velocity of the water appeared to have little influence on the results for velocities ranging from 0.3 to 3 m/s. Uncertainty results for all major measurement points are also presented.

Parker, B.; O`Neal, D.L. [Texas A and M Univ., College Station, TX (United States). Dept. of Mechanical Engineering

1995-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

Inhibition of slug front corrosion in multiphase flow conditions  

SciTech Connect (OSTI)

Corrosion at the slug front at the bottom of a pipeline is identified as one of the worst cases of corrosion occurring in the pipeline which carries unprocessed multiphase production with a high level of CO{sub 2} gas. One objective of the study in recommending a subsea completion to shore was to determine if commercial corrosion inhibitors can control this type of corrosion using carbon steel pipeline. Thus, inhibitors which showed excellent performance in the lab using the Rotating Cylinder Electrode system (RCE) were further evaluated to confirm their performance in a flow loop simulating the test conditions predicted from the flow modeling for the proposed pipeline. The performance profile of two commercial inhibitors were determined in a 4 in. flow loop at 7O C, 100 psig CO{sub 2} partial pressure in corrosive brines with or without ethylene glycol and/or light hydrocarbon. Results showed that the carbon steel pipeline could be adequately protected at low temperature using a commercial corrosion inhibitor to meet the designed life of the pipeline. Ethylene glycol, which is used in the pipeline to prevent hydrate formation, reduces the corrosivity of the brine and gives no effect on inhibitor performance under the slug flow conditions. A good agreement in inhibitor performance was observed between the flow loop and the RCE testing. The uninhibited corrosion rate of the test brine in this study is in good agreement with the predicted value using deWaard and Williams correlation for CO{sub 2} corrosion.

Chen, H.J. [Chevron Petroleum Technology Co., La Habra, CA (United States); Jepson, W.P. [Ohio Univ., Athens, OH (United States)

1998-12-31T23:59:59.000Z

222

Characterization of the coherent noise, electromagnetic compatibility and electromagnetic interference of the ATLAS EM calorimeter Front End Board  

E-Print Network [OSTI]

Characterization of the coherent noise, electromagnetic compatibility and electromagnetic interference of the ATLAS EM calorimeter Front End Board

Chase, B E; Lanni, F; Makowiecki, D S; Radeka, V; Rescia, S; Takai, H; Bn, J; Parsons, J; Sippach, W

1999-01-01T23:59:59.000Z

223

Low Power Front-End Electronics for the BESS-Polar Time-of-Flight Counter and Aerogel Cherenkov Counter  

E-Print Network [OSTI]

Low Power Front-End Electronics for the BESS-Polar Time-of-Flight Counter and Aerogel Cherenkov Counter

Sasaki, M

2005-01-01T23:59:59.000Z

224

Light-Front Quantization Approach to the Gauge-Gravity Correspondence and Hadron Spectroscopy  

SciTech Connect (OSTI)

We find a correspondence between semiclassical QCD quantized on the light-front and a dual gravity model in anti--de Sitter (AdS) space, thus providing an initial approximation to QCD in its strongly coupled regime. This correspondence--light-front holography--leads to a light-front Hamiltonian and relativistic bound-state wave equations that are functions of an invariant impact variable {zeta} which measures the separation of the quark and gluonic constituents within hadrons at equal light-front time. The eigenvalues of the resulting light-front Schroedinger and Dirac equations are consistent with the observed light meson and baryon spectrum, and the eigenmodes provide the light-front wavefunctions, the probability amplitudes describing the dynamics of the hadronic constituents. The light-front equations of motion, which are dual to an effective classical gravity theory, possess remarkable algebraic and integrability properties which are dictated by the underlying conformal properties of the theory. We extend the algebraic construction to include a confining potential while preserving the integrability of the mesonic and baryonic bound-state equations.

Teramond, Guy F. de [Universidad de Costa Rica, San Jose (Costa Rica); Brodsky, Stanley J. [SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94309 (United States)

2010-08-05T23:59:59.000Z

225

Feature Stories | Argonne National Laboratory  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibility of SF 6 Gas-Insulated TransformersFeatureFeature

226

HIGH-EFFICIENCY BACK-JUNCTION SILICON SOLAR CELL WITH AN IN-LINE EVAPORATED ALUMINUM FRONT GRID  

E-Print Network [OSTI]

HIGH-EFFICIENCY BACK-JUNCTION SILICON SOLAR CELL WITH AN IN-LINE EVAPORATED ALUMINUM FRONT GRID M-diffused back-junction emitter. The aluminum front side grid is evaporated in an industrial-type in-thick silicon shadow masks for the in-line evaporation of the aluminum front grid. The masks are fabricated

227

Travelling fronts of the CO oxidation on Pd(111) with coverage-dependent diffusion  

SciTech Connect (OSTI)

In this work, we study a surface reaction on Pd(111) crystals under ultra-high-vacuum conditions that can be modeled by two coupled reaction-diffusion equations. In the bistable regime, the reaction exhibits travelling fronts that can be observed experimentally using photo electron emission microscopy. The spatial profile of the fronts reveals a coverage-dependent diffusivity for one of the species. We propose a method to solve the nonlinear eigenvalue problem and compute the direction and the speed of the fronts based on a geometrical construction in phase-space. This method successfully captures the dependence of the speed on control parameters and diffusivities.

Cisternas, Jaime, E-mail: jecisternas@miuandes.cl [Facultad de Ingeniera y Ciencias Aplicadas, Universidad de los Andes, Monseor Alvaro del Portillo 12455, Las Condes, Santiago (Chile); Karpitschka, Stefan [Physics of Fluids, University of Twente, Drienerlolaan 5, 7522 NB Enschede (Netherlands); Wehner, Stefan [Institut fr Integrierte Naturwissenschaften - Physik, Universitt Koblenz-Landau, 56070 Koblenz (Germany)

2014-10-28T23:59:59.000Z

228

FCLib: The Feature Characterization Library.  

SciTech Connect (OSTI)

The Feature Characterization Library (FCLib) is a software library that simplifies the process of interrogating, analyzing, and understanding complex data sets generated by finite element applications. This document provides an overview of the library, a description of both the design philosophy and implementation of the library, and examples of how the library can be utilized to extract understanding from raw datasets.

Gentile, Ann C.; Doyle, Wendy S. K.; Kegelmeyer, W. Philip [Sandia National Laboratories, Livermore, CA; Ulmer, Craig D. [Sandia National Laboratories, Livermore, CA

2008-11-01T23:59:59.000Z

229

NIF featured on BBC "Horizon"  

SciTech Connect (OSTI)

The National Ignition Facility, the world's largest laser system, located at Lawrence Livermore National Laboratory, was featured in the BBC broadcast "Horizon" hosted by physicist Brian Cox. Here is the NIF portion of the program, which was entitled "Can We Make A Star On Earth?" This video is used with the express permission of the BBC.

Brian Cox

2010-01-12T23:59:59.000Z

230

NIF featured on BBC "Horizon"  

ScienceCinema (OSTI)

The National Ignition Facility, the world's largest laser system, located at Lawrence Livermore National Laboratory, was featured in the BBC broadcast "Horizon" hosted by physicist Brian Cox. Here is the NIF portion of the program, which was entitled "Can We Make A Star On Earth?" This video is used with the express permission of the BBC.

Brian Cox

2010-09-01T23:59:59.000Z

231

Hydrogen Pathways: Updated Cost, Well-to-Wheels Energy Use, and Emissions for the Current Technology Status of Ten Hydrogen Production, Delivery, and Distribution Scenarios  

SciTech Connect (OSTI)

This report describes a life-cycle assessment conducted by the National Renewable Energy Laboratory (NREL) of 10 hydrogen production, delivery, dispensing, and use pathways that were evaluated for cost, energy use, and greenhouse gas (GHG) emissions. This evaluation updates and expands on a previous assessment of seven pathways conducted in 2009. This study summarizes key results, parameters, and sensitivities to those parameters for the 10 hydrogen pathways, reporting on the levelized cost of hydrogen in 2007 U.S. dollars as well as life-cycle well-to-wheels energy use and GHG emissions associated with the pathways.

Ramsden, T.; Ruth, M.; Diakov, V.; Laffen, M.; Timbario, T. A.

2013-03-01T23:59:59.000Z

232

26-percent efficient point-junction concentrator solar cells with a front metal grid  

SciTech Connect (OSTI)

This paper reports on silicon concentrator cells with point diffusions and metal contacts on both the front and back sides. The design minimizes reflection losses by forming an inverted pyramid topography on the front surface and by shaping the metal grid lines in the form of a triangular ridge. A short-circuit current density of 39.6 mA/cm{sup 2} has been achieved even though the front grid covers 16 percent of the cell's active area of 1.56 cm{sup 2}. This, together with an open-circuit voltage of 700 mV, has led to an efficiency of 22 percent at one sun, AM1.5 global spectrum. Under direct-spectrum, 8.8-W/cm{sup 2}, concentrated light, the efficiency is 26 percent. This is the highest ever reported for a silicon cell having a front metal grid.

Cuevas, A.; Sinton, R.A.; Midkiff, N.E.; Swanson, R.M. (Stanford Univ., CA (USA). Dept. of Electrical Engineering)

1990-01-01T23:59:59.000Z

233

Detection technique and front-end RF tunable filter for cognitive radio systems  

E-Print Network [OSTI]

dual-mode WiMAX/WLAN direct- conversion receiver, in Proc.Hamilton, Aspects of direct conversion receiver design, inand M. Ismail, A direct conversion WiMAX RF receiver front-

Park, Sanghoon

2010-01-01T23:59:59.000Z

234

Dusty gust fronts and their contributions to long-lived convection in West Africa/  

E-Print Network [OSTI]

To model and predict the behavior of West African storms and mesoscale convective systems (MCSs), we must understand the life cycle of gust fronts, which invariably accompany thunderstorms and often initiate them. In this ...

McGraw-Herdeg, Michael (Michael P.)

2010-01-01T23:59:59.000Z

235

A survey of front end modularity as an automotive architecture and its ability to deliver value  

E-Print Network [OSTI]

The partitioning of a system can and will dictate the creative space for a designer or engineer. This thesis will analyze how using a new automotive architecture known as a Front End Module (FEM) can affect a limited ...

Mah, Vincent R. (Vincent Robert)

2008-01-01T23:59:59.000Z

236

Electronic-nose for detecting environmental pollutants: signal processing and analog front-end design  

E-Print Network [OSTI]

noise floor analog front-end (AFE) fol- lowed by a signal processing stage. In this paper, we present the output of eight conductometric sensors and eight ampero- metric electrochemical sensors and achieves 91 d

237

E-Print Network 3.0 - augmented hadronic light-front Sample Search...  

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

Jagiellonski Collection: Physics 5 Vol. 32 (2001) ACTA PHYSICA POLONICA B No 12 QCD PHENOMENOLOGY AND LIGHT-FRONT Summary: of a hadrons in terms of a set of frame-independent...

238

E-Print Network 3.0 - aps beamline front Sample Search Results  

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

Page 1 of 11 Policy& Procedure : 3.1.37 Summary: The beamline front end provides the UHV transition from the APS storage ring through the ratchet wall... to the portions of the...

239

Autonomous detection and anticipation of jam fronts from messages propagated by inter-vehicle communication  

E-Print Network [OSTI]

In this paper, a minimalist, completely distributed freeway traffic information system is introduced. It involves an autonomous, vehicle-based jam front detection, the information transmission via inter-vehicle communication, and the forecast of the spatial position of jam fronts by reconstructing the spatiotemporal traffic situation based on the transmitted information. The whole system is simulated with an integrated traffic simulator, that is based on a realistic microscopic traffic model for longitudinal movements and lane changes. The function of its communication module has been explicitly validated by comparing the simulation results with analytical calculations. By means of simulations, we show that the algorithms for a congestion-front recognition, message transmission, and processing predict reliably the existence and position of jam fronts for vehicle equipment rates as low as 3%. A reliable mode of operation already for small market penetrations is crucial for the successful introduction of inter-...

Sch"onhof, M; Kesting, A; Helbing, D; Sch\\"onhof, Martin; Treiber, Martin; Kesting, Arne; Helbing, Dirk

2006-01-01T23:59:59.000Z

240

Non-Adiabatic Effects on Combustion Front Propagation in Porous Media: Multiplicity of Steady States  

SciTech Connect (OSTI)

The sustained propagation of combustion fronts in porous media is a necessary condition for the success of an in situ combustion project for oil recovery. Compared to other recovery methods, in situ combustion involves the added complexity of exothermic reactions and temperature-dependent chemical kinetics. In the presence of heat losses, the possibility of ignition and extinction (quenching) exists. In this report, we address the properties of combustion fronts propagating at a constant velocity in the presence of heat losses.

Akkutlu, I. Yucel; Yortsos, Yanis C.

2002-03-11T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

The Communist revolution in Republican China: the conceptual development of the second united front.  

E-Print Network [OSTI]

THE COMMUNIS( RE'JOLUT ION IN REPUBL ICAN CHINA: THE CONCEPTUAL DEVELOPMENT OF THE SECOND UNITED FRONT A Thesis by BRIAN LANNES HOPE Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement... for the degree oi MASTER OF ARTS December, 1974 Major Subject: Political Science THE COMMUNIST REVOLUTION IN REPUBLICAN CHINA: THE CONCEPTUAL DEVELOPMENT OF THE SECOND UNITED FRONT A Thesis by BRIAN LANNES HOPE Approved as to style and content by: +~9...

Hope, Brian Lannes

1974-01-01T23:59:59.000Z

242

Light-Front Quantization Approach to the Gauge Gravity Correspondence and Hadron Spectroscopy  

SciTech Connect (OSTI)

We find a correspondence between semiclassical QCD quantized on the light-front and a dual gravity model in anti-de Sitter (AdS) space, thus providing an initial approximation to QCD in its strongly coupled regime. This correspondence - light-front holography - leads to a light-front Hamiltonian and relativistic bound-state wave equations that are functions of an invariant impact variable {zeta} which measures the separation of the quark and gluonic constituents within hadrons at equal lightfront time. The eigenvalues of the resulting light-front Schrodinger and Dirac equations are consistent with the observed light meson and baryon spectrum, and the eigenmodes provide the light-front wavefunctions, the probability amplitudes describing the dynamics of the hadronic constituents. The light-front equations of motion, which are dual to an effective classical gravity theory, possess remarkable algebraic and integrability properties which are dictated by the underlying conformal properties of the theory. We extend the algebraic construction to include a confining potential while preserving the integrability of the mesonic and baryonic bound-state equations.

de Teramond, Guy F.; /Costa Rica U.; Brodsky, Stanley J.; /SLAC

2010-05-26T23:59:59.000Z

243

Robust Lateral Control of Heavy Duty Vehicles: Final Report  

E-Print Network [OSTI]

system tracks the desired front wheel steering angle ? 1 exactly, then the sliding variable asymptotically converges to a ball

Tai, Meihua; Tomizuka, Masayoshi

2003-01-01T23:59:59.000Z

244

Lateral Control of Heavy Vehicles for Automated Systems  

E-Print Network [OSTI]

system tracks the desired front wheel steering angle (? 1 ) exactly, then the sliding variable will asymptotically converg to a ball,

Hingwe, Pushkar; Wang, Jen-Yu; Tai, Meihua; Tomizuka, Masayoshi

2003-01-01T23:59:59.000Z

245

Embedded software version 1. 1. Features  

E-Print Network [OSTI]

are connected with connector on front panel; - a temperature sensor, placed on the board; - header, which allows to change base address of device; - embedded microcontroller. A photo of device. The device may work sensitivity of on-board sensor 1,9 mV/. 13. Output voltage of temperature sensor at +25 0.56 10%. 14

Kozak, Victor R.

246

The Wheel Turns  

E-Print Network [OSTI]

in the street. IIJim, corne herso I wBnt to telk to yoU.'I Kirk cems over and knelt 8t Spock's feet, resting hL.;) erms on th(:) Vul can IS knee-3 9 end looking up anxiously into his feee. "What is it, Spack? Have I done something '"rang?" "Of course not...

Piacentini, Valerie

1977-01-01T23:59:59.000Z

247

The Wheel of Fate  

E-Print Network [OSTI]

,," "Goodnight, Jim." Dawn found them already preparing to leave ?. '['he rucksacks stood at the door, together with warm outer clothing for each of them. In the }itchen Jim and Spock were finishing a hasty meel. The skies had cleared, and although...

Piacentini, Valerie, with poetry by Sheila Clark

1980-01-01T23:59:59.000Z

248

Reinventing the Wheel  

E-Print Network [OSTI]

Broadcast Transcript: You heard it here before though maybe not first: China invented everything. From gunpowder to the wheelbarrow to paper and ink, it was made in China first. Which puts the Chinese in a bind. I mean, ...

Hacker, Randi

2009-10-28T23:59:59.000Z

249

ARM - Features and Releases Archive  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformation InExplosionAnnouncements Media ContactCenterFeature

250

Feature Stories | Argonne National Laboratory  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibility of SF 6 Gas-Insulated Transformers BrandonFeature

251

Feature Stories | Argonne National Laboratory  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibility of SF 6 Gas-Insulated TransformersFeature Stories

252

Feature Stories | Argonne National Laboratory  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibility of SF 6 Gas-Insulated TransformersFeature

253

Feature Stories | Argonne National Laboratory  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4:Epitaxial ThinFORFALL NEWS ROCKY MOUNTAINFastFeature Stories

254

Features 2010 | ornl.gov  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4:Epitaxial ThinFORFALL NEWS ROCKY MOUNTAINFastFeature Stories0

255

Features 2011 | ornl.gov  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4:Epitaxial ThinFORFALL NEWS ROCKY MOUNTAINFastFeature Stories01

256

Features 2012 | ornl.gov  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4:Epitaxial ThinFORFALL NEWS ROCKY MOUNTAINFastFeature Stories012

257

Features 2013 | ornl.gov  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4:Epitaxial ThinFORFALL NEWS ROCKY MOUNTAINFastFeature Stories0123

258

Features | National Nuclear Security Administration  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4:Epitaxial ThinFORFALL NEWS ROCKY MOUNTAINFastFeature

259

Galaxies and clusters around and in front of radio sources  

E-Print Network [OSTI]

Some recent work on radio source fields at z~0.7 and z~4 is discussed. At z~0.7 we find that radio-loud quasars are typically found in moderately rich environments independent of radio luminosity, consistent with previous results at z~0.5. In the field of the z=4.41 radio galaxy 6C0140+326 we find several candidate z>4 galaxies using the Lyman-break technique, two of which have detectable UV absorption features. In two z>4 radio galaxies, we find evidence for gravitational lensing affecting the fluxes by a few tens of percent, although we cannot rule out unusual lensing events which have larger magnifications associated with them. A simple calculation suggests lensing of z>4 radio sources should be very common.

M. Lacy

1998-02-11T23:59:59.000Z

260

Well-to-wheels energy use and greenhouse gas emissions analysis of plug-in hybrid electric vehicles.  

SciTech Connect (OSTI)

Researchers at Argonne National Laboratory expanded the Greenhouse gases, Regulated Emissions, and Energy use in Transportation (GREET) model and incorporated the fuel economy and electricity use of alternative fuel/vehicle systems simulated by the Powertrain System Analysis Toolkit (PSAT) to conduct a well-to-wheels (WTW) analysis of energy use and greenhouse gas (GHG) emissions of plug-in hybrid electric vehicles (PHEVs). The WTW results were separately calculated for the blended charge-depleting (CD) and charge-sustaining (CS) modes of PHEV operation and then combined by using a weighting factor that represented the CD vehicle-miles-traveled (VMT) share. As indicated by PSAT simulations of the CD operation, grid electricity accounted for a share of the vehicle's total energy use, ranging from 6% for a PHEV 10 to 24% for a PHEV 40, based on CD VMT shares of 23% and 63%, respectively. In addition to the PHEV's fuel economy and type of on-board fuel, the marginal electricity generation mix used to charge the vehicle impacted the WTW results, especially GHG emissions. Three North American Electric Reliability Corporation regions (4, 6, and 13) were selected for this analysis, because they encompassed large metropolitan areas (Illinois, New York, and California, respectively) and provided a significant variation of marginal generation mixes. The WTW results were also reported for the U.S. generation mix and renewable electricity to examine cases of average and clean mixes, respectively. For an all-electric range (AER) between 10 mi and 40 mi, PHEVs that employed petroleum fuels (gasoline and diesel), a blend of 85% ethanol and 15% gasoline (E85), and hydrogen were shown to offer a 40-60%, 70-90%, and more than 90% reduction in petroleum energy use and a 30-60%, 40-80%, and 10-100% reduction in GHG emissions, respectively, relative to an internal combustion engine vehicle that used gasoline. The spread of WTW GHG emissions among the different fuel production technologies and grid generation mixes was wider than the spread of petroleum energy use, mainly due to the diverse fuel production technologies and feedstock sources for the fuels considered in this analysis. The PHEVs offered reductions in petroleum energy use as compared with regular hybrid electric vehicles (HEVs). More petroleum energy savings were realized as the AER increased, except when the marginal grid mix was dominated by oil-fired power generation. Similarly, more GHG emissions reductions were realized at higher AERs, except when the marginal grid generation mix was dominated by oil or coal. Electricity from renewable sources realized the largest reductions in petroleum energy use and GHG emissions for all PHEVs as the AER increased. The PHEVs that employ biomass-based fuels (e.g., biomass-E85 and -hydrogen) may not realize GHG emissions benefits over regular HEVs if the marginal generation mix is dominated by fossil sources. Uncertainties are associated with the adopted PHEV fuel consumption and marginal generation mix simulation results, which impact the WTW results and require further research. More disaggregate marginal generation data within control areas (where the actual dispatching occurs) and an improved dispatch modeling are needed to accurately assess the impact of PHEV electrification. The market penetration of the PHEVs, their total electric load, and their role as complements rather than replacements of regular HEVs are also uncertain. The effects of the number of daily charges, the time of charging, and the charging capacity have not been evaluated in this study. A more robust analysis of the VMT share of the CD operation is also needed.

Elgowainy, A.; Burnham, A.; Wang, M.; Molburg, J.; Rousseau, A.; Energy Systems

2009-03-31T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

Localized structures and front propagation in the Lengyel-Epstein model  

SciTech Connect (OSTI)

Pattern selection, localized structure formation, and front propagation are analyzed within the framework of a model for the chlorine dioxide--iodine--malonic acid reaction that represents a key to understanding recently obtained Turing structures. This model is distinguished from previously studied, simple reaction-diffusion models by producing a strongly subcritical transition to stripes. The wave number for the modes of maximum linear gain is calculated and compared with the dominant wave number for the finally selected, stationary structures grown from the homogeneous steady state or developed behind a traveling front. The speed of propagation for a front between the homogeneous steady state and a one-dimensional (1D) Turing structure is obtained. This velocity shows a characteristic change in behavior at the crossover between the subcritical and supercritical regimes for the Turing bifurcation. In the subcritical regime there is an interval where the front velocity vanishes as a result of a pinning of the front to the underlying structure. In 2D, two different nucleation mechanisms for hexagonal structures are illustrated on the Lengyel-Epstein and the Brusselator model. Finally, the observation of 1D and 2D spirals with Turing-induced cores is reported.

Jensen, O.; Pannbacker, V.O.; Mosekilde, E.; Dewel, G.; Borckmans, P. (Physics Department, Technical University of Denmark, 2800 Lyngby (Denmark) Service de Chimie-Physique, Code Postal 231 Universite Libre de Bruxelles, 1050 Brussels (Belgium))

1994-08-01T23:59:59.000Z

262

Apparatus for characterizing the temporo-spatial properties of a dynamic fluid front and method thereof  

SciTech Connect (OSTI)

Methods and apparatus are described for characterizing the temporal-spatial properties of a dynamic fluid front within a mold space while the mold space is being filled with fluid. A method includes providing a mold defining a mold space and having one or more openings into the mold space; heating a plurality of temperature sensors that extend into the mold space; injecting a fluid into th emold space through the openings, the fluid experiencing a dynamic fluid front while filling the mold space with a fluid; and characterizing temporal-spatial properties of the dynamic fluid front by monitoring a termperature of each of the plurality of heated temperature sensors while the mold space is being filled with the fluid. An apparatus includes a mold defining a mold space; one or more openings for introducing a fluid into th emold space and filling the mold space with the fluid, the fluid experiencing a dynamic fluid front while filling the mold space; a plurality of heated temperature sensors extending into the mold space; and a computer coupled to the plurality of heated temperature sensors for characterizing the temporal-spatial properties of the dynamic fluid front.

Battiste, Richard L

2013-12-31T23:59:59.000Z

263

Apparatus for characterizing the temporo-spatial properties of a dynamic fluid front and method thereof  

DOE Patents [OSTI]

Methods and apparatus are described for characterizing the temporal-spatial properties of a dynamic fluid front within a mold space while the mold space is being filled with fluid. A method includes providing a mold defining a mold space and having one or more openings into the mold space; heating a plurality of temperature sensors that extend into the mold space; injecting a fluid into the mold space through the openings, the fluid experiencing a dynamic fluid front while filling the mold space with the fluid; and characterizing temporal-spatial properties of the dynamic fluid front by monitoring a temperature of each of the plurality of heated temperature sensors while the mold space is being filled with the fluid. An apparatus includes a mold defining a mold space; one or more openings for introducing a fluid into the mold space and filling the mold space with the fluid, the fluid experiencing a dynamic fluid front while filling the mold space; a plurality of heated temperature sensors extending into the mold space; and a computer coupled to the plurality of heated temperature sensors for characterizing the temporal-spatial properties of the dynamic fluid front.

Battiste, Richard L. (Oak Ridge, TN)

2007-12-25T23:59:59.000Z

264

Gauge/Gravity Duality and Strongly Coupled Light-Front Dynamics  

SciTech Connect (OSTI)

We find a correspondence between semiclassical gauge theories quantized on the light-front and a dual gravity model in anti-de Sitter (AdS) space, thus providing an initial approximation to QCD in its strongly coupled regime. This correspondence - light-front holography - leads to a light-front Hamiltonian and relativistic bound-state wave equations in terms of an invariant impact variable {zeta} which measures the separation of the quark and gluonic constituents within the hadron at equal light-front time. Light-front holography also allows a precise mapping of transition amplitudes from AdS to physical space-time. In contrast with the usual AdS/QCD framework, the internal structure of hadrons is explicitly introduced in the gauge/gravity correspondence and the angular momentum of the constituents plays a key role. We also discuss how to introduce higher Fock-states in the correspondence as well as their relevance for describing the detailed structure of space and time-like form factors.

de Teramond, Guy F.; /Costa Rica U.; Brodsky, Stanley J.; /SLAC /Southern Denmark U., CP3-Origins

2011-08-12T23:59:59.000Z

265

Light-front representation of chiral dynamics in peripheral transverse densities  

E-Print Network [OSTI]

The nucleon's electromagnetic form factors are expressed in terms of the transverse densities of charge and magnetization at fixed light-front time. At peripheral transverse distances $b = O(M_\\pi^{-1})$ the densities are governed by chiral dynamics and can be calculated model-independently using chiral effective field theory (EFT). We represent the leading-order chiral EFT results for the peripheral transverse densities as overlap integrals of chiral light-front wave functions, describing the transition of the initial nucleon to soft pion-nucleon intermediate states and back. The new representation (a) explains the parametric order of the peripheral transverse densities; (b) establishes an inequality between the spin-independent and -dependent densities; (c) exposes the role of pion orbital angular momentum in chiral dynamics; (d) reveals a large left-right asymmetry of the current in a transversely polarized nucleon and suggests a simple interpretation. The light-front representation enables a first-quantiz...

Granados, C

2015-01-01T23:59:59.000Z

266

Measures of the Environmental Footprint of the Front End of the Nuclear Fuel Cycle  

SciTech Connect (OSTI)

Previous estimates of environmental impacts associated with the front end of the nuclear fuel cycle have focused primarily on energy consumption and CO2 emissions. Results have varied widely. Section 2 of this report provides a summary of historical estimates. This study revises existing empirical correlations and their underlying assumptions to fit to a more complete set of existing data. This study also addresses land transformation, water withdrawals, and occupational and public health impacts associated with the processes of the front end of the once-through nuclear fuel cycle. These processes include uranium mining, milling, refining, conversion, enrichment, and fuel fabrication. Metrics are developed to allow environmental impacts to be summed across the full set of front end processes, including transportation and disposition of the resulting depleted uranium.

Brett Carlsen; Emily Tavrides; Erich Schneider

2010-08-01T23:59:59.000Z

267

CW Room Temperature Re-Buncher for the Project X Front End  

SciTech Connect (OSTI)

At Fermilab there is a plan to construct the Project X Injector Experiment (PXIE) facility - a prototype of the front end of the Project X, a multi-MW proton source based on superconducting linac. The construction and successful operations of this facility will validate the concept for the Project X front end, thereby minimizing the primary technical risk element within the Project. The room temperature front end of the linac contains an ion source, an RFQ accelerator and a Medium Energy Beam Transport (MEBT) section comprising a high bandwidth bunch selective chopper. The MEBT length is about 10 m, so three re-bunching CW cavities are used to support the beam longitudinal dynamics. The paper reports a RF design of the re-bunchers along with preliminary beam dynamic and thermal analysis of the cavities.

Romanov, Gennady; Awida, Mohamed H.; Chen, Meiyu; Gonin, Ivan V.; Kazakov, Sergey; Kostin, Roman; Lebedev, Valeri; Solyak, Nikolay; Yakovlev, Vyacheslav P.; /Fermilab

2012-05-09T23:59:59.000Z

268

Apparatus and method for phase fronts based on superluminal polarization current  

DOE Patents [OSTI]

An apparatus and method for a radiation source involving phase fronts emanating from an accelerated, oscillating polarization current whose distribution pattern moves superluminally (that is, faster than light in vacuo). Theoretical predictions and experimental measurements using an existing prototype superluminal source show that the phase fronts from such a source can be made to be very complex. Consequently, it will be very difficult for an aircraft imaged by such a radiation to detect where this radiation has come from. Moreover, the complexity of the phase fronts makes it almost impossible for electronics on an aircraft to synthesize a rogue reflection. A simple directional antenna and timing system should, on the other hand, be sufficient for the radar operators to locate the aircraft, given knowledge of their own source's speed and modulation pattern.

Singleton, John (Los Alamos, NM); Ardavan, Houshang (Cambridge, GB); Ardavan, Arzhang (Cambridge, GB)

2012-02-28T23:59:59.000Z

269

Dynamical model for longitudinal wave functions in light-front holographic QCD  

SciTech Connect (OSTI)

We construct a Schrdinger-like equation for the longitudinal wave function of a meson in the valence qq{sup -bar} sector, based on the t Hooft model for large-N two-dimensional QCD, and combine this with the usual transverse equation from light-front holographic QCD, to obtain a model for mesons with massive quarks. The computed wave functions are compared with the wave function ansatz of Brodsky and de Tramond and used to compute decay constants and parton distribution functions. The basis functions used to solve the longitudinal equation may be useful for more general calculations of meson states in QCD. -- Highlights: Provide relativistic quark model based on light-front holographic QCD. Incorporate dependence on quark mass. Consistent with the Brodskyde Tramond quark-wave-function ansatz. Compute meson decay constants and parton distribution functions. Illustrate use of basis functions that could be convenient for more general numerical calculations in light-front QCD.

Chabysheva, Sophia S.; Hiller, John R., E-mail: jhiller@d.umn.edu

2013-10-15T23:59:59.000Z

270

Report on the value engineering workshop on APS beamline front ends  

SciTech Connect (OSTI)

A formal value engineering evaluation process was developed to address the front end components of the beamlines for the Advanced Photon Source (APS). This process (described in Section 2) involved an information phase, a creative phase, a judgment phase, a development phase, and a recommendation phase. Technical experts from other national laboratories and industry were invited to a two-day Value Engineering Workshop on November 5-6, 1992. The results of this Workshop are described in Section 4. Following the Workshop, various actions by the APS staff led to the redesign of the front end components, which are presented in Sections 5 and 6. The cost benefit analysis is presented in Section 7. It is important of realize that an added benefit of the Workshop was to obtain numerous design evaluations and enhancements of the front end components by experts in the field. As the design work proceeds to Title II completion, the APS staff is including many of these suggestions.

Kuzay, T.

1993-01-01T23:59:59.000Z

271

The Wave-Front Correction System for the Sunrise Balloon-Borne Solar Observatory  

E-Print Network [OSTI]

This paper describes the wave-front correction system developed for the Sunrise balloon telescope, and provides information about its in-flight performance. For the correction of low-order aberrations, a Correlating Wave-Front Sensor (CWS) was used. It consisted of a six-element Shack-Hartmann wave-front sensor (WFS), a fast tip-tilt mirror for the compensation of image motion, and an active telescope secondary mirror for focus correction. The CWS delivered a stabilized image with a precision of 0.04 arcsec (rms), whenever the coarse pointing was better than 90 arcsec peak-to-peak. The automatic focus adjustment maintained a focus stability of 0.01 waves in the focal plane of the CWS. During the 5.5 day flight, good image quality and stability was achieved during 33 hours, containing 45 sequences that lasted between 10 and 45 minutes.

Berkefeld, T; Soltau, D; Bell, A; Doerr, H P; Feger, B; Friedlein, R; Gerber, K; Heidecke, F; Kentischer, T; Lhe, O v d; Sigwarth, M; Wlde, E; Barthol, P; Deutsch, W; Gandorfer, A; Germerott, D; Grauf, B; Meller, R; Alvarez-Herrero, A; Knlker, M; Pillet, V Martinez; Solanki, S K; Title, A M

2010-01-01T23:59:59.000Z

272

Front-flash thermal imaging characterization of continuous fiber ceramic composites.  

SciTech Connect (OSTI)

Infrared thermal imaging has become increasingly popular as a nondestructive evaluation method for characterizing materials and detecting defects. One technique, which was utilized in this study, is front-flash thermal imaging. We have developed a thermal imaging system that uses this technique to characterize advanced material systems, including continuous fiber ceramic composite (CFCC) components. In a front-flash test, pulsed heat energy is applied to the surface of a sample, and decay of the surface temperature is then measured by the thermal imaging system. CFCC samples with drilled flat-bottom holes at the back surface (to serve as ''flaws'') were examined. The surface-temperature/time relationship was analyzed to determine the depths of the flaws from the front surface of the CFCC material. Experimental results on carbon/carbon and CFCC samples are presented and discussed.

Deemer, C.

1999-04-23T23:59:59.000Z

273

Front-end Electronics Test for the LHCb Muon Wire Chambers  

E-Print Network [OSTI]

This document describes the apparatus and procedures implemented to test Multi Wire Proportional Chambers (MWPC) after front-end assembly for the LHCb Muon Detector. Results of measurements of key noise parameters are also described. Given a fully equipped chamber, this system is able to diagnose every channel performing an analysis of front-end output drivers response and noise rate versus threshold. Besides, it allows to assess if the noise rate at the experiment threshold region is within appropriate limits. Aiming at an automatic, fast and user-friendly system for mass production tests of MWPC, the project has foreseen as well electronic identification of every chamber and front-end board, and data archiving in such a way to make it available to the Experiment Control System (ECS) while in operation.

Nobrega, R; Carboni, G; Massafferri, A; Santovetti, E

2007-01-01T23:59:59.000Z

274

AdS/QCD and Light Front Holography: A New Approximation to QCD  

SciTech Connect (OSTI)

The combination of Anti-de Sitter space (AdS) methods with light-front holography leads to a semi-classical first approximation to the spectrum and wavefunctions of meson and baryon light-quark bound states. Starting from the bound-state Hamiltonian equation of motion in QCD, we derive relativistic light-front wave equations in terms of an invariant impact variable {zeta} which measures the separation of the quark and gluonic constituents within the hadron at equal light-front time. These equations of motion in physical space-time are equivalent to the equations of motion which describe the propagation of spin-J modes in anti-de Sitter (AdS) space. Its eigenvalues give the hadronic spectrum, and its eigenmodes represent the probability distribution of the hadronic constituents at a given scale. Applications to the light meson and baryon spectra are presented. The predicted meson spectrum has a string-theory Regge form M{sup 2} = 4{kappa}{sup 2}(n+L+S/2); i.e., the square of the eigenmass is linear in both L and n, where n counts the number of nodes of the wavefunction in the radial variable {zeta}. The space-like pion form factor is also well reproduced. One thus obtains a remarkable connection between the description of hadronic modes in AdS space and the Hamiltonian formulation of QCD in physical space-time quantized on the light-front at fixed light-front time {tau}. The model can be systematically improved by using its complete orthonormal solutions to diagonalize the full QCD light-front Hamiltonian or by applying the Lippmann-Schwinger method in order to systematically include the QCD interaction terms.

Brodsky, Stanley J.; de Teramond, Guy

2010-02-15T23:59:59.000Z

275

@ work' video segment features Robotic Software Engineer  

ScienceCinema (OSTI)

@ work highlights Idaho National Laboratory employees and the jobs they perform.This segment features Robotic Software Engineer Miles Walton.

Idaho National Laboratory

2010-01-08T23:59:59.000Z

276

Cost of Ownership and Well-to-Wheels Carbon Emissions/Oil Use of Alternative Fuels and Advanced Light-Duty Vehicle Technologies  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE), Argonne National Laboratory (Argonne), and the National Renewable Energy Laboratory (NREL) updated their analysis of the well-to-wheels (WTW) greenhouse gases (GHG) emissions, petroleum use, and the cost of ownership (excluding insurance, maintenance, and miscellaneous fees) of vehicle technologies that have the potential to significantly reduce GHG emissions and petroleum consumption. The analyses focused on advanced light-duty vehicle (LDV) technologies such as plug-in hybrid, battery electric, and fuel cell electric vehicles. Besides gasoline and diesel, alternative fuels considered include natural gas, advanced biofuels, electricity, and hydrogen. The Argonne Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation (GREET) and Autonomie models were used along with the Argonne and NREL H2A models.

Elgowainy, Mr. Amgad [Argonne National Laboratory (ANL); Rousseau, Mr. Aymeric [Argonne National Laboratory (ANL); Wang, Mr. Michael [Argonne National Laboratory (ANL); Ruth, Mr. Mark [National Renewable Energy Laboratory (NREL); Andress, Mr. David [David Andress & Associates, Inc.; Ward, Jacob [U.S. Department of Energy; Joseck, Fred [U.S. Department of Energy; Nguyen, Tien [U.S. Department of Energy; Das, Sujit [ORNL

2013-01-01T23:59:59.000Z

277

Transient nature of salt movement with wetting front in an unsaturated soil  

E-Print Network [OSTI]

TRANSIENT NATURE OF SALT MOVEMENT WITH WETTING FRONT IN AN UNSATURATED SOIL A Thesis bY VISHWAS VINAYAK SOMAN Submitted to the Office of Graduate Studies of Texas A&M UniversitY in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE August 1992 Major Subject: Agricultural Engineering TRANSIENT NATURE OF SALT MOVEMENT WITH WETTING FRONT IN AN UNSATURATED SOIL A Thesis VISHWAS VINAYAK SOMAN Approved as to style and content by: Marshall J. McFarland (Chair...

Soman, Vishwas Vinayak

1992-01-01T23:59:59.000Z

278

Comparison of quantum field perturbation theory for the light front with the theory in lorentz coordinates  

E-Print Network [OSTI]

The relationship between the perturbation theory in light-front coordinates and Lorentz-covariant perturbation theory is investigated. A method for finding the difference between separate terms of the corresponding series without their explicit evaluation is proposed. A procedure of constructing additional counter-terms to the canonical Hamiltonian that compensate this difference at any finite order is proposed. For the Yukawa model, the light-front Hamiltonian with all of these counter-terms is obtained in a closed form. Possible application of this approach to gauge theories is discussed.

S. A. Paston; V. A. Franke

1999-01-22T23:59:59.000Z

279

CHAPTER FIVE Impacts of Anthropogenic Features on  

E-Print Network [OSTI]

clustering these features to maximize available habitats. Key Words: avoidance behavior, energy develop- ment Prairie-Chicken avoidance behavior of anthropogenic features be quantified for impact assessment and con of monthly home ranges (95% fixed kernels, n 539) and estimated the likelihood that anthropogenic features (i

Sandercock, Brett K.

280

Discriminant Absorption Feature Learning for Material Classification  

E-Print Network [OSTI]

1 Discriminant Absorption Feature Learning for Material Classification Zhouyu Fu, Antonio Robles in spectral imaging by combining the use of invariant spectral absorption features and statistical machine learning techniques. Our method hinges in the relevance of spectral absorption features for material

Robles-Kelly, Antonio

Note: This page contains sample records for the topic "features front wheel" 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

Intelligent front-end sample preparation tool using acoustic streaming.  

SciTech Connect (OSTI)

We have successfully developed a nucleic acid extraction system based on a microacoustic lysis array coupled to an integrated nucleic acid extraction system all on a single cartridge. The microacoustic lysing array is based on 36{sup o} Y cut lithium niobate, which couples bulk acoustic waves (BAW) into the microchannels. The microchannels were fabricated using Mylar laminates and fused silica to form acoustic-fluidic interface cartridges. The transducer array consists of four active elements directed for cell lysis and one optional BAW element for mixing on the cartridge. The lysis system was modeled using one dimensional (1D) transmission line and two dimensional (2D) FEM models. For input powers required to lyse cells, the flow rate dictated the temperature change across the lysing region. From the computational models, a flow rate of 10 {micro}L/min produced a temperature rise of 23.2 C and only 6.7 C when flowing at 60 {micro}L/min. The measured temperature changes were 5 C less than the model. The computational models also permitted optimization of the acoustic coupling to the microchannel region and revealed the potential impact of thermal effects if not controlled. Using E. coli, we achieved a lysing efficacy of 49.9 {+-} 29.92 % based on a cell viability assay with a 757.2 % increase in ATP release within 20 seconds of acoustic exposure. A bench-top lysing system required 15-20 minutes operating up to 58 Watts to achieve the same level of cell lysis. We demonstrate that active mixing on the cartridge was critical to maximize binding and release of nucleic acid to the magnetic beads. Using a sol-gel silica bead matrix filled microchannel the extraction efficacy was 40%. The cartridge based magnetic bead system had an extraction efficiency of 19.2%. For an electric field based method that used Nafion films, a nucleic acid extraction efficiency of 66.3 % was achieved at 6 volts DC. For the flow rates we tested (10-50 {micro}L/min), the nucleic acid extraction time was 5-10 minutes for a volume of 50 {micro}L. Moreover, a unique feature of this technology is the ability to replace the cartridges for subsequent nucleic acid extractions.

Cooley, Erika J.; McClain, Jaime L.; Murton, Jaclyn K.; Edwards, Thayne L.; Achyuthan, Komandoor E.; Branch, Darren W.; Clem, Paul Gilbert; Anderson, John Mueller; James, Conrad D.; Smith, Gennifer; Kotulski, Joseph Daniel

2009-09-01T23:59:59.000Z

282

Stability of planar reactive fronts in external fields Arkady B. Rovinsky,* Anatol M. Zhabotinsky,  

E-Print Network [OSTI]

in reactive systems due to external fields such as electric fields or pressure gradients, may significantlyStability of planar reactive fronts in external fields Arkady B. Rovinsky,* Anatol M. Zhabotinsky arise naturally in systems sub- jected to external fields, such as electric fields or pressure gradients

Epstein, Irving R.

283

A discontinuous Galerkin front tracking method for two-phase flows with surface tension  

E-Print Network [OSTI]

A discontinuous Galerkin front tracking method for two-phase flows with surface tension Vinh with surface tension. ? 2009 Elsevier Ltd. All rights reserved. 1. Introduction Interfaces separating regions tension. In this case, the interface separates two different fluids and the effect of surface tension re

Peraire, Jaime

284

A front-tracking algorithm for accurate representation of surface tension  

E-Print Network [OSTI]

A front-tracking algorithm for accurate representation of surface tension Stephane Popinet particularly, we focus our attention on obtaining an accurate description of the surface-tension terms and the associated pressure jump. We consider the stationary Laplace solution for a bub- ble with surface tension

Frey, Pascal

285

Green radio despite "Dirty RF" front-end Myriam Ariaudo*1  

E-Print Network [OSTI]

Green radio despite "Dirty RF" front-end Myriam Ariaudo*1 , Inbar Fijalkow1 , Jean-Luc Gautier1 in order to contribute in a Green radio development. In fact, the effects of typical RF imperfections, like algorithms are applied. Such algorithms enable Green applications (e.g., Orthogonal Frequency Division

Fijalkow, Inbar

286

2 Bainitic Ferrite The growth of pearlite occurs at a common transformation front with the  

E-Print Network [OSTI]

2 Bainitic Ferrite The growth of pearlite occurs at a common transformation front with the austenite. The growth of the ferrite and cementite phases is coupled and their compositions are complementary since the carbon which cannot be accommodated by the ferrite is incorporated into the cementite

Cambridge, University of

287

Zero modes in the light-front coupled-cluster method  

SciTech Connect (OSTI)

The light-front coupled-cluster (LFCC) method is a technique for solving Hamiltonian eigenvalue problems in light-front-quantized field theories. Its primary purpose is to provide a systematic sequence of solvable approximations to the original eigenvalue problem without the truncation of Fock space. Here we discuss the incorporation of zero modes, modes of zero longitudinal momentum, into the formalism of the method. Without zero modes, the light-front vacuum is trivial, and the vacuum expectation value of the field is always zero. The LFCC method with zero modes provides for vacuum structure, in the form of a generalized coherent state of zero modes, as is illustrated here in two-dimensional model field theories. -- Highlights: Extends the light-front coupled-cluster method to include zero modes. Illustrates with an analysis of vacuum structure for phi-3, phi-4, and WickCutkosky model field theories. Demonstrates the applicability of the LFCC method to theories with spontaneous symmetry breaking.

Chabysheva, Sophia S.; Hiller, John R., E-mail: jhiller@d.umn.edu

2014-01-15T23:59:59.000Z

288

Export of Asian pollution during two cold front episodes of the TRACE-P experiment  

E-Print Network [OSTI]

Export of Asian pollution during two cold front episodes of the TRACE-P experiment C. Mari how these cyclonic systems have impacted the export of pollution out of the Asian continent. We of pollution are met during flight 13 (i.e., the occurrences of the warm conveyor belt near the source regions

Palmer, Paul

289

Ice-front variation and tidewater behavior on Helheim and Kangerdlugssuaq Glaciers, Greenland  

E-Print Network [OSTI]

Ice-front variation and tidewater behavior on Helheim and Kangerdlugssuaq Glaciers, Greenland Ian Glaciers, Greenland, from 2001 to 2006, a period in which they retreated and sped up. These data show and retreat in less than a century indicates that tidewater glaciers in Greenland can advance rapidly

Tsai, Victor C.

290

Numerical study of the diapycnal flow through a tidal front with passive tracers  

E-Print Network [OSTI]

. This qualitatively agrees with a recent field experiment using a dye tracer on Georges Bank. Additional experiments are performed to investigate the sensitivity of the tracer dispersion to the tidal phase and the location, the previous studies indicated Eulerian cross-front mean circu- lation maybe is in a multiple-cell structure

Dong, Changming "Charles"

291

Development of Novel Front Contract Pastes for Crystalline Silicon Solar Cells  

SciTech Connect (OSTI)

In order to improve the efficiencies of silicon solar cells, paste to silicon contact formation mechanisms must be more thoroughly understood as a function of paste chemistry, wafer properties and firing conditions. Ferro Corporation has been involved in paste development for over 30 years and has extensive expertise in glass and paste formulations. This project has focused on the characterization of the interface between the top contact material (silver paste) and the underlying silicon wafer. It is believed that the interface between the front contact silver and the silicon wafer plays a dominant role in the electrical performance of the solar cell. Development of an improved front contact microstructure depends on the paste chemistry, paste interaction with the SiNx, and silicon (Si) substrate, silicon sheet resistivity, and the firing profile. Typical front contact ink contains silver metal powders and flakes, glass powder and other inorganic additives suspended in an organic medium of resin and solvent. During fast firing cycles glass melts, wets, corrodes the SiNx layer, and then interacts with underlying Si. Glass chemistry is also a critical factor in the development of an optimum front contact microstructure. Over the course of this project, several fundamental characteristics of the Ag/Si interface were documented, including a higher-than-expected distribution of voids along the interface, which could significantly impact electrical conductivity. Several techniques were also investigated for the interfacial analysis, including STEM, EDS, FIB, EBSD, and ellipsometry.

Duty, C.; Jellison, D. G.E. P.; Joshi, P.

2012-04-05T23:59:59.000Z

292

Front propagation techniques to calculate the largest Lyapunov exponent of dilute hard disk gases  

E-Print Network [OSTI]

A kinetic approach is adopted to describe the exponential growth of a small deviation of the initial phase space point, measured by the largest Lyapunov exponent, for a dilute system of hard disks, both in equilibrium and in a uniform shear flow. We derive a generalized Boltzmann equation for an extended one-particle distribution that includes deviations from the reference phase space point. The equation is valid for very low densities n, and requires an unusual expansion in powers of 1/|ln n|. It reproduces and extends results from the earlier, more heuristic clock model and may be interpreted as describing a front propagating into an unstable state. The asymptotic speed of propagation of the front is proportional to the largest Lyapunov exponent of the system. Its value may be found by applying the standard front speed selection mechanism for pulled fronts to the case at hand. For the equilibrium case, an explicit expression for the largest Lyapunov exponent is given and for sheared systems we give explicit expressions that may be evaluated numerically to obtain the shear rate dependence of the largest Lyapunov exponent.

R. van Zon; H. van Beijeren

2002-07-02T23:59:59.000Z

293

Fluid Dynamics Research 33 (2003) 173189 The distortion of weak fronts by mesoscale orography  

E-Print Network [OSTI]

University of Technology, Delft, NL c Environment Centre, University of Leeds, Leeds LS2 9JT, UK d Department the surface of the orography, that a narrow portion of the front eventually overturns, leading to enhanced and the localised overturning process is examined within an analytical framework. c 2003 Published by The Japan

Hunt, Julian

294

CSCI 3060U/ENGR 3980U -Winter 2013 Course Project Assignment #1 -Front End Requirements  

E-Print Network [OSTI]

and in true XP fashion represent those requirements as a set of requirements tests. Create and organize a complete set of requirements tests for the Front End of the Ticket Selling Service, to test for every required behaviour. Do not write any programs yet. Each test should be a complete test session input stream

Bradbury, Jeremy S.

295

Geodesic Remeshing Using Front Propagation Gabriel Peyre (peyre@cmapx.polytechnique.fr)  

E-Print Network [OSTI]

Geodesic Remeshing Using Front Propagation Gabriel Peyr´e (peyre@cmapx.polytechnique.fr) CMAP modeling and processing that uses only fast geodesic computations. The basic building block, an intrinsic algo- rithm for computing geodesic centroidal tessellations, and a fast and robust method

Paris-Sud XI, Université de

296

A FREEWARE PROGRAM FOR PRECISE OPTICAL ANALYSIS OF THE FRONT SURFACE OF A SOLAR CELL  

E-Print Network [OSTI]

A FREEWARE PROGRAM FOR PRECISE OPTICAL ANALYSIS OF THE FRONT SURFACE OF A SOLAR CELL Simeon C. Baker-Finch and Keith R. McIntosh Centre for Sustainable Energy Systems, Australian National University, Canberra, ACT 0200, AUSTRALIA Tel: +61-2-6125-8966, Fax: +61-2-6125-8873, Email: simeon

297

LIDAR OBSERVATIONS AND COMPARISON WITH NUMERICAL SIMULATION OF A LAKE MICHIGAN LAND BREEZE FRONT  

E-Print Network [OSTI]

of the Lake-Induced Convection Experiments (Lake-ICE), on December 21, 1997 the University of Wisconsin VolumeLIDAR OBSERVATIONS AND COMPARISON WITH NUMERICAL SIMULATION OF A LAKE MICHIGAN LAND BREEZE FRONT G circulation over Lake Michigan. Backscatter returns revealed a steady offshore flow extending 1.5 to 4 km

Eloranta, Edwin W.

298

Shack Hartmann wave-front measurement with a large F-number plastic microlens array  

E-Print Network [OSTI]

Hartmann wave-front sensor, deformable mirror. r 1996 Optical Society of America 1. Introduction In direct The improvement in laser irradiation uniformity of a spherical target is necessary for higher efficiency in the fusion reaction. In the laser system used for this purpose, large optical devices of several tens

Yoon, Geunyoung

299

Fronts in the Southwestern Gulf of Maine5 Nicholas W. Woods1,2  

E-Print Network [OSTI]

Autonomous Systems Laboratory,12 Physical Oceanography Department13 Woods Hole Oceanographic Institution14 15, and autonomous underwater glider observations. Density fronts are found throughout47 the southwestern GOM during inversely upon the time-integrated regional wind stress magnitude and49 the rate of river discharge

Fratantoni, David

300

Hierarchical Modelling of Automotive Sensor Front-Ends For Structural Diagnosis of Aging Faults  

E-Print Network [OSTI]

functions previously handled purely mechanical. In addition hybrid and pure electrical cars are emerging are hybrid and electrical cars. The automotive semiconductor elec- tronics market amounted to 19.5 billion for the development of dependable analogue/mixed-signal car front-ends, by interfacing aging models between different

Wieringa, Roel

Note: This page contains sample records for the topic "features front wheel" 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

ICE Professionals Limited Email: dean@theicebase.com Ph: (09) 557 1450 Front End Developer  

E-Print Network [OSTI]

ICE Professionals Limited Email: dean@theicebase.com Ph: (09) 557 1450 Front End Developer, this is the job for you. Responsibilities: Producing high quality HTML/CSS and JavaScript solutions. Providing to produce dynamic pages If you are interested in this role, send your CV and academic transcript to Dean

Sun, Jing

302

Front. Electr. Electron. Eng. DOI 10.1007/s11460-012-0170-6  

E-Print Network [OSTI]

both to perform inference and for learning. By contrast, machine learning techniques are often deFront. Electr. Electron. Eng. DOI 10.1007/s11460-012-0170-6 Alan YUILLE, Xuming HE Probabilistic machines (SVMs) and hence we reduce the learning to standard machine learning methods. We show that many

Yuille, Alan L.

303

CIAO-HELLO information Centre Helpdesk, front office, person-to-person interaction  

E-Print Network [OSTI]

CIAO-HELLO information Centre Helpdesk, front office, person-to-person interaction and welcome to foreign students 5th Erasmus Staff Mobility Week 2014 Rome 23rd - 27th, June 2014 #12;CIAO-HELLO of student experience exchanges A rise in the international scenario at Sapienza Pagina 224/06/2014CIAO-HELLO

Di Pillo, Gianni

304

ElEctromagnEtic analysis and testing Flap, inside Front cover  

E-Print Network [OSTI]

#12;ElEctromagnEtic analysis and testing Flap, inside Front cover Sandia National Laboratories, homeland security, nonproliferation, and industrial competitiveness. ElEctromagnEtic analysis and testing #12;ElEctromagnEtic analysis and testingElEctromagnEtic analysis and testing Technology that harnesses

Fuerschbach, Phillip

305

Silicon Solar Cells with Front Hetero-Contact and Aluminum Alloy Back Junction: Preprint  

SciTech Connect (OSTI)

We prototype an alternative n-type monocrystalline silicon (c-Si) solar cell structure that utilizes an n/i-type hydrogenated amorphous silicon (a-Si:H) front hetero-contact and a back p-n junction formed by alloying aluminum (Al) with the n-type Si wafer.

Yuan, H.-C.; Page, M. R.; Iwaniczko, E.; Xu, Y.; Roybal, L.; Wang, Q.; Branz, H. M.; Meier, D. L.

2008-05-01T23:59:59.000Z

306

Average crack front velocity during subcritical fracture propagation in a heterogeneous medium  

E-Print Network [OSTI]

Average crack front velocity during subcritical fracture propagation in a heterogeneous medium relaxation tests, exploring subcritical to critical regimes. Transparency of the material (PMMA) allows kinetic crack propagation is usually referred to as sub-critical crack growth or sub- critical regime

Paris-Sud XI, Université de

307

Asymmetry of Tidal Plume Fronts in an Eastern Boundary Current Regime  

E-Print Network [OSTI]

water mass. This vorticity controls the transition of the tidal plume 2 #12;front to a subcritical state bulge, which in turn is embedded in far-field plume and coastal waters. Because of the mixing caused on its upwind or northern side) and marks a transition from supercritical to subcritical flow for 6

Jay, David

308

|Low Graphics version Change edition | |About BBC News Feedback Help News Front Page  

E-Print Network [OSTI]

|Low Graphics version Change edition | |About BBC News Feedback Help News Front Page World UK by the International Atomic Energy Agency to mark 50 years of nuclear power. What the IAEA acknowledges as the world-mura, Japan Jet Kurchatov Institute International Atomic Energy Agency The BBC is not responsible

309

Sensitivity of mesoscale gravity waves to the baroclinicity of jet-front systems  

E-Print Network [OSTI]

To investigate the generation of mesoscale gravity waves from upper-tropospheric jet-front systems, five different life cycles of baroclinic waves are simulated with a high-resolution mesoscale model (MM5 with 10-km grid spacing). The baroclinicity...

Wang, Shuguang

2006-04-12T23:59:59.000Z

310

A model-dye comparison experiment in the tidal mixing front zone on the southern flank of Georges Bank  

E-Print Network [OSTI]

A model-dye comparison experiment in the tidal mixing front zone on the southern flank of Georges; revised 8 June 2007; accepted 30 October 2007; published 9 February 2008. [1] A process-oriented model-dye the observed movement of dye across the tidal mixing front on the southern flank of Georges Bank during 22

Chen, Changsheng

311

MA et al.: SKETCH RETRIEVAL VIA STROKE FEATURES 1 Sketch Retrieval via Dense Stroke Features  

E-Print Network [OSTI]

MA et al.: SKETCH RETRIEVAL VIA STROKE FEATURES 1 Sketch Retrieval via Dense Stroke Features Chao search method. In this paper, we propose a representation scheme which takes sketch strokes into account with local features, thereby facilitat- ing efficient retrieval with codebooks. Stroke features are detected

Yang, Ming-Hsuan

312

Light-Front Quantization and AdS/QCD: An Overview  

SciTech Connect (OSTI)

We give an overview of the light-front holographic approach to strongly coupled QCD, whereby a confining gauge theory, quantized on the light front, is mapped to a higher-dimensional anti de Sitter (AdS) space. The framework is guided by the AdS/CFT correspondence incorporating a gravitational background asymptotic to AdS space which encodes the salient properties of QCD, such as the ultraviolet conformal limit at the AdS boundary at z {yields} 0, as well as modifications of the geometry in the large z infrared region to describe confinement and linear Regge behavior. There are two equivalent procedures for deriving the AdS/QCD equations of motion: one can start from the Hamiltonian equation of motion in physical space time by studying the off-shell dynamics of the bound state wavefunctions as a function of the invariant mass of the constituents. To a first semiclassical approximation, where quantum loops and quark masses are not included, this leads to a light-front Hamiltonian equation which describes the bound state dynamics of light hadrons in terms of an invariant impact variable {zeta} which measures the separation of the partons within the hadron at equal light-front time. Alternatively, one can start from the gravity side by studying the propagation of hadronic modes in a fixed effective gravitational background. Both approaches are equivalent in the semiclassical approximation. This allows us to identify the holographic variable z in AdS space with the impact variable {zeta}. Light-front holography thus allows a precise mapping of transition amplitudes from AdS to physical space-time. The internal structure of hadrons is explicitly introduced and the angular momentum of the constituents plays a key role.

de Teramond, Guy F.; /Costa Rica U.; Brodsky, Stanley J.; /SLAC /Stanford U., Phys. Dept.

2011-08-19T23:59:59.000Z

313

October 1999 1999, Elsevier Science Inc., 1040-6190/99/$see front matter PII S1040-6190(99)00074-3 77 Transmission Rights and  

E-Print Network [OSTI]

October 1999 © 1999, Elsevier Science Inc., 1040-6190/99/$­see front matter PII S1040., 1040-6190/99/$­see front matter PII S1040-6190(99)00074-3 The Electricity Journal Much

Kammen, Daniel M.

314

1359-6446/02/$ see front matter 2002 Elsevier Science Ltd. All rights reserved. PII: DDT Vol. 7, No. 18 (Suppl.), 2002  

E-Print Network [OSTI]

1359-6446/02/$ ­ see front matter ©2002 Elsevier Science Ltd. All rights reserved. PII: DDT Vol. 7

Sabatini, David M.

315

Data Foundations Data Attributes and Features  

E-Print Network [OSTI]

1 Data Foundations Data Attributes and Features Data Pre-processing Data Storage Data Analysis Data Sources 1 Data Attributes Describing data content and characteristics Representing data Data Sortable Data Numerical Attributes 4 Discrete vs. Continuous #12;3 Statistical Features of Data 5

Fang, Shiaofen

316

FIELD TEST OF THE WATER-WHEEL IR (WIR) SPECTROMETER ON EVAPORATIVE SALT DEPOSITS AT TIBETAN PLATEAU. P. Sobron, J. J. Freeman, Alian Wang, Dept Earth and Planetary Sciences  

E-Print Network [OSTI]

"contact survey", i.e., to install a WIR unit inside of a well set into the middle wheel of a pla- netary of WIR has a size of 10x7.5x6.5cm, mass of 450 grams, power consump- tion of 4W, and output data through transformed into a rugged, field portable NIR reflectance spectrometer that is able to operate in tough field

317

Nature Climate Change features Los Alamos forest research  

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

Nature Climate Change Features Forest Research Nature Climate Change features Los Alamos forest research The print issue features as its cover story the tree-stress research of...

318

Transient moisture migration and phase change front propagation in porous media  

SciTech Connect (OSTI)

The process of transient moisture migration in a semi-infinite slab of porous concrete being heated at one side has been analyzed. The model solves the heat and mass transfer equations considering water and air migration in the concrete, including evaporation and recondensation effects. The domain is subdivided into a dry region and a wet region, with the phase-change-front motion being modeled via mass and energy conservation at the front. Approximate solutions are obtained by use of a similarity transformation and numerical integration of the resulting ordinary differential equations. Typical results and parametric evaluations are given for the cases of an impermeable outer surface as well as an outer surface exposed to ambient pressure.

Shiina, Y.; Kroeger, P.G.

1984-01-01T23:59:59.000Z

319

Engineering Spectral Control Using Front Surface Filters for Maximum TPV Energy Conversion System Performance  

SciTech Connect (OSTI)

Energy conversion efficiencies of better than 23% have been demonstrated for small scale tests of a few thermophotovoltaic (TPV) cells using front surface, tandem filters [1, 2]. The engineering challenge is to build this level of efficiency into arrays of cells that provide useful levels of energy. Variations in cell and filter performance will degrade TPV array performance. Repeated fabrication runs of several filters each provide an initial quantification of the fabrication variation for front surface, tandem filters for TPV spectral control. For three performance statistics, within-run variation was measured to be 0.7-1.4 percent, and run-to-run variation was measured to be 0.5-3.2 percent. Fabrication runs using a mask have been shown to reduce variation across interference filters from as high as 8-10 percent to less than 1.5 percent. Finally, several system design and assembly approaches are described to further reduce variation.

T Rahmlow, Jr; J Lazo-Wasem, E Gratrix; J Azarkevich; E Brown; D DePoy; D Eno; P Fourspring; J Parrington; R Mahorter; B Wernsman

2004-10-14T23:59:59.000Z

320

Engineering Spectral Control Using Front Surface Filters for Maximum TPV Energy Conversion System Performance  

SciTech Connect (OSTI)

Energy conversion efficiencies of better than 23% have been demonstrated for small scale tests of a few thermophotovoltaic (TPV) cells using front surface, tandem filters [1,2]. The engineering challenge is to build this level of efficiency into arrays of cells that provide useful levels of energy. Variations in cell and filter performance will degrade TPV array performance. Repeated fabrication runs of several filters each provide an initial quantification of the fabrication variation for front surface, tandem filters for TPV spectral control. For three performance statistics, within-run variation was measured to be 0.7-1.4 percent, and run-to-run variation was measured to be 0.5-3.2 percent. Fabrication runs using a mask have been shown to reduce variation across interference filters from as high 8-10 percent to less than 1.5 percent. Finally, several system design and assembly approaches are described to further reduce variation.

TD Rahmlaw, Jr; JE Lazo-Wasem; EJ Gratrix; JJ Azarkevich; EJ Brown; DM DePoy; DR Eno; PM Fourspring; JR Parrington; RG Mahorter; B Wernsman

2004-08-04T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

Light-Front Holography and Gauge/Gravity Duality: The Light Meson and Baryon Spectra  

SciTech Connect (OSTI)

Starting from the bound state Hamiltonian equation of motion in QCD, we derive relativistic light-front wave equations in terms of an invariant impact variable {zeta} which measures the separation of the quark and gluonic constituents within the hadron at equal light-front time. These equations of motion in physical space-time are equivalent to the equations of motion which describe the propagation of spin-J modes in anti-de Sitter (AdS) space. Its eigenvalues give the hadronic spectrum, and its eigenmodes represent the probability amplitudes of the hadronic constituents at a given scale. An effective classical gravity description in a positive-sign dilaton background exp(+{kappa}{sup 2}z{sup 2}) is given for the phenomenologically successful soft-wall model which naturally encodes the internal structure of hadrons and their orbital angular momentum. Applications to the light meson and baryon spectrum are presented.

de Teramond, Guy F.; /Costa Rica U.; Brodsky, Stanley J.; /SLAC

2009-12-09T23:59:59.000Z

322

On relation between rest frame and light-front descriptions of quarkonium  

E-Print Network [OSTI]

In this paper we study the relation between the light-front (infinite momentum) and rest-frame descriptions of quarkonia. While the former is more convenient for high-energy production, the latter is usually used for the evaluation of charmonium properties. In particular, we discuss the dynamics of a relativistically moving system with nonrelativistic internal motion and give relations between rest frame and light-front potentials used for the description of quarkonium states. We consider two approximations, first the small coupling regime, and next the nonperturbative small binding energy approximation. In both cases we get consistent results. Our results could be relevant for the description of final state interactions in a wide class of processes, including quarkonium production on nuclei and plasma. Moreover, they can be extended to the description of final state interactions in the production of weakly bound systems, such as for example the deuteron.

B. Z. Kopeliovich; E. Levin; Ivan Schmidt; M. Siddikov

2015-01-07T23:59:59.000Z

323

On relation between rest frame and light-front descriptions of quarkonium  

E-Print Network [OSTI]

In this paper we study the relation between the light-front (infinite momentum) and rest-frame descriptions of quarkonia. While the former is more convenient for high-energy production, the latter is usually used for the evaluation of charmonium properties. In particular, we discuss the dynamics of a relativistically moving system with nonrelativistic internal motion and give relations between rest frame and light-front potentials used for the description of quarkonium states. We consider two approximations, first the small coupling regime, and next the nonperturbative small binding energy approximation. In both cases we get consistent results. Our results could be relevant for the description of final state interactions in a wide class of processes, including quarkonium production on nuclei and plasma. Moreover, they can be extended to the description of final state interactions in the production of weakly bound systems, such as for example the deuteron.

Kopeliovich, B Z; Schmidt, Ivan; Siddikov, M

2015-01-01T23:59:59.000Z

324

Wave fronts, pulses and wave trains in photoexcited superlattices behaving as excitable or oscillatory media  

E-Print Network [OSTI]

Undoped and strongly photoexcited semiconductor superlattices with field-dependent recombination behave as excitable or oscillatory media with spatially discrete nonlinear convection and diffusion. Infinitely long, dc-current-biased superlattices behaving as excitable media exhibit wave fronts with increasing or decreasing profiles, whose velocities can be calculated by means of asymptotic methods. These superlattices can also support pulses of the electric field. Pulses moving downstream with the flux of electrons can be constructed from their component wave fronts, whereas pulses advancing upstream do so slowly and experience saltatory motion: they change slowly in long intervals of time separated by fast transitions during which the pulses jump to the previous superlattice period. Photoexcited superlattices can also behave as oscillatory media and exhibit wave trains.

J. I. Arana; L. L. Bonilla; H. T. Grahn

2011-09-30T23:59:59.000Z

325

High-power, low-lateral divergence broad area quantum cascade lasers with a tilted front facet  

SciTech Connect (OSTI)

We introduce a simple technique to improve the beam quality of broad area quantum cascade lasers. Moderately tilted front facets of the laser provide suppression of higher order lateral waveguide modes. A device with a width of 60??m and a front facet angle of 17 shows a nearly diffraction limited beam profile. In addition, the peak output power and the slope efficiency of the device are increased since most of the light inside the cavity is emitted through the tilted front facet by an asymmetric light intensity distribution along the cavity.

Ahn, Sangil, E-mail: sangil.ahn@tuwien.ac.at; Schwarzer, Clemens; Zederbauer, Tobias; MacFarland, Donald C.; Detz, Hermann; Andrews, Aaron M.; Schrenk, Werner; Strasser, Gottfried [Institute for Solid State Electronics, Vienna University of Technology, 1040 Vienna (Austria)

2014-02-03T23:59:59.000Z

326

AdS/QCD, LIight-Front Holography, and the Non-perturbative Running Coupling  

SciTech Connect (OSTI)

The combination of Anti-de Sitter space (AdS) methods with light-front (LF) holography provides a remarkably accurate first approximation for the spectra and wavefunctions of meson and baryon light-quark bound states. The resulting bound-state Hamiltonian equation of motion in QCD leads to relativistic light-front wave equations in terms of an invariant impact variable {zeta} which measures the separation of the quark and gluonic constituents within the hadron at equal light-front time. These equations of motion in physical space-time are equivalent to the equations of motion which describe the propagation of spin-J modes in anti-de Sitter (AdS) space. The eigenvalues give the hadronic spectrum, and the eigenmodes represent the probability distributions of the hadronic constituents at a given scale. A positive-sign confining dilaton background modifying AdS space gives a very good account of meson and baryon spectroscopy and form factors. The light-front holographic mapping of this model also leads to a non-perturbative effective coupling {alpha}{sub s}{sup Ads} (Q{sup 2}) which agrees with the effective charge defined by the Bjorken sum rule and lattice simulations. It displays a transition from perturbative to nonperturbative conformal regimes at a momentum scale {approx} 1 GeV. The resulting {beta}-function appears to capture the essential characteristics of the full {beta}-function of QCD, thus giving further support to the application of the gauge/gravity duality to the confining dynamics of strongly coupled QCD.

Brodsky, Stanley J.; /SLAC; de Teramond, Guy; /Costa Rica U.; Deur, Alexandre; /Jefferson Lab

2010-04-29T23:59:59.000Z

327

AdS/CFT and Light-Front Holography: A Theory of Strong Interactions  

SciTech Connect (OSTI)

Recent developments in the theory of strong interactions are discussed in the framework of the AdS/CFT duality between string theories of gravity in a higher dimension Anti-de Sitter space and conformal quantum field theories in physical space-time. This novel theoretical approach, combined with 'light-front holography', leads to new insights into the quark and gluon structure of hadrons and a viable first approximation to quantum chromodynamics, the fundamental theory of the strong and nuclear interactions.

Brodsky, Stanley J.; /SLAC; Teramond, Guy F.de; /Costa Rica U.

2009-02-23T23:59:59.000Z

328

report 2013 Front cover image: Greenough River Solar Farm, Western Australia.  

E-Print Network [OSTI]

R heAtinG 59 WinD PoWeR 65 appendiCes 65 APPenDiX 1: toP 10 SolAR PoStCoDeS by StAte 68 APPenDiX 2 #12. From jobs and investment in regional areas to solar panels, solar hot water and high efficiencyClean energy australia report 2013 #12;Front cover image: Greenough River Solar Farm, Western

Green, Donna

329

Method and apparatus for generating radiation utilizing DC to AC conversion with a conductive front  

DOE Patents [OSTI]

Method and apparatus for generating radiation of high power, variable duration and broad tunability over several orders of magnitude from a laser-ionized gas-filled capacitor array. The method and apparatus convert a DC electric field pattern into a coherent electromagnetic wave train when a relativistic ionization front passes between the capacitor plates. The frequency and duration of the radiation is controlled by the gas pressure and capacitor spacing.

Dawson, John M. (Pacific Palisades, CA); Mori, Warren B. (Hermosa Beach, CA); Lai, Chih-Hsiang (So. Pasadena, CA); Katsouleas, Thomas C. (Malibu, CA)

1998-01-01T23:59:59.000Z

330

Method and apparatus for generating radiation utilizing DC to AC conversion with a conductive front  

DOE Patents [OSTI]

Method and apparatus ar disclosed for generating radiation of high power, variable duration and broad tunability over several orders of magnitude from a laser-ionized gas-filled capacitor array. The method and apparatus convert a DC electric field pattern into a coherent electromagnetic wave train when a relativistic ionization front passes between the capacitor plates. The frequency and duration of the radiation is controlled by the gas pressure and capacitor spacing. 4 figs.

Dawson, J.M.; Mori, W.B.; Lai, C.H.; Katsouleas, T.C.

1998-07-14T23:59:59.000Z

331

Resource intensities of the front end of the nuclear fuel cycle  

SciTech Connect (OSTI)

This paper presents resource intensities, including direct and embodied energy consumption, land and water use, associated with the processes comprising the front end of the nuclear fuel cycle. These processes include uranium extraction, conversion, enrichment, fuel fabrication and depleted uranium de-conversion. To the extent feasible, these impacts are calculated based on data reported by operating facilities, with preference given to more recent data based on current technologies and regulations. All impacts are normalized per GWh of electricity produced. Uranium extraction is seen to be the most resource intensive front end process. Combined, the energy consumed by all front end processes is equal to less than 1% of the electricity produced by the uranium in a nuclear reactor. Land transformation and water withdrawals are calculated at 8.07 m{sup 2} /GWh(e) and 1.37x10{sup 5} l/GWh(e), respectively. Both are dominated by the requirements of uranium extraction, which accounts for over 70% of land use and nearly 90% of water use.

Schneider, E.; Phathanapirom, U. [The University of Texas at Austin, 1 University Station C2200, Austin TX 78712 (United States); Eggert, R.; Collins, J. [Colorado School of Mines, 1500 Illinois St., Golden CO 80401 (United States)

2013-07-01T23:59:59.000Z

332

Design of a Portable Test Facility for the ATLAS Tile Calorimeter Front-End Electronics Verification  

E-Print Network [OSTI]

The stand-alone test-bench deployed in the past for the verification of the Tile Calorimeter (TileCal) front-end electronics is reaching the end of its life cycle. A new version of the test-bench has been designed and built with the aim of improving the portability and exploring new technologies for future versions of the TileCal read-out electronics. An FPGA based motherboard with an embedded hardware processor and a few dedicated daughter-boards are used to implement all the functionalities needed to interface with the front-end electronics (TTC, G-Link, CANbus) and to verify the functionalities using electronic signals and LED pulses. The new device is portable and performs well, allowing the validation in realistic conditions of the data transmission rate. We discuss the system implementation and all the tests required to gain full confidence in the operation of the front-end electronics of the TileCal in the ATLAS detector.

Kim, H Y; The ATLAS collaboration; Carrio, F; Moreno, P; Masike, T; Reed, R; Sandrock, C; Schettino, V; Shalyugin, A; Solans, C; Souza, J; Suter, R; Usai, G; Valero, A

2013-01-01T23:59:59.000Z

333

H-Morph: An indirect approach to advancing front hex meshing  

SciTech Connect (OSTI)

H-Morph is a new automatic algorithm for the generation of a hexahedral-dominant finite element mesh for arbitrary volumes. The H-Morph method starts with an initial tetrahedral mesh and systematically transforms and combines tetrahedral into hexahedra. It uses an advancing front technique where the initial front consists of a set of prescribed quadrilateral surface facets. Fronts are individually processed by recovering each of the six quadrilateral faces of a hexahedron from the tetrahedral mesh. Recovery techniques similar to those used in boundary constrained Delaunay mesh generation are used. Tetrahedral internal to the six hexahedral faces are then removed and a hexahedron is formed. At any time during the H-Morph procedure a valid mixed hexahedral-tetrahedral mesh is in existence within the volume. The procedure continues until no tetrahedral remain within the volume, or tetrahedral remain which cannot be transformed or combined into valid hexahedral elements. Any remaining tetrahedral are typically towards the interior of the volume, generally a less critical region for analysis. Transition from tetrahedral to hexahedra in the final mesh is accomplished through pyramid shaped elements. Advantages of the proposed method include its ability to conform to an existing quadrilateral surface mesh, its ability to mesh without the need to decompose or recognize special classes of geometry, and its characteristic well-aligned layers of elements parallel to the boundary. Example test cases are presented on a variety of models.

OWEN,STEVEN J.; SAIGAL,SUNIL

2000-05-30T23:59:59.000Z

334

FBI Fingerprint Image Capture System High-Speed-Front-End throughput modeling  

SciTech Connect (OSTI)

The Federal Bureau of Investigation (FBI) has undertaken a major modernization effort called the Integrated Automated Fingerprint Identification System (IAFISS). This system will provide centralized identification services using automated fingerprint, subject descriptor, mugshot, and document processing. A high-speed Fingerprint Image Capture System (FICS) is under development as part of the IAFIS program. The FICS will capture digital and microfilm images of FBI fingerprint cards for input into a central database. One FICS design supports two front-end scanning subsystems, known as the High-Speed-Front-End (HSFE) and Low-Speed-Front-End, to supply image data to a common data processing subsystem. The production rate of the HSFE is critical to meeting the FBI`s fingerprint card processing schedule. A model of the HSFE has been developed to help identify the issues driving the production rate, assist in the development of component specifications, and guide the evolution of an operations plan. A description of the model development is given, the assumptions are presented, and some HSFE throughput analysis is performed.

Rathke, P.M.

1993-09-01T23:59:59.000Z

335

Passive Safety Features for Small Modular Reactors  

SciTech Connect (OSTI)

The rapid growth in the size and complexity of commercial nuclear power plants in the 1970s spawned an interest in smaller, simpler designs that are inherently or intrinsically safe through the use of passive design features. Several designs were developed, but none were ever built, although some of their passive safety features were incorporated into large commercial plant designs that are being planned or built today. In recent years, several reactor vendors are actively redeveloping small modular reactor (SMR) designs with even greater use of passive features. Several designs incorporate the ultimate in passive safety they completely eliminate specific accident initiators from the design. Other design features help to reduce the likelihood of an accident or help to mitigate the accident s consequences, should one occur. While some passive safety features are common to most SMR designs, irrespective of the coolant technology, other features are specific to water, gas, or liquid-metal cooled SMR designs. The extensive use of passive safety features in SMRs promise to make these plants highly robust, protecting both the general public and the owner/investor. Once demonstrated, these plants should allow nuclear power to be used confidently for a broader range of customers and applications than will be possible with large plants alone.

Ingersoll, Daniel T [ORNL] [ORNL

2010-01-01T23:59:59.000Z

336

Section: Front  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBi (2) SrEvaluating the Seasonalsw ' b 0 % bP. May, G.J. Kim

337

Front cover  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibilityFieldMinds"OfficeTourFrom clustersMon,

338

Feasibility and electromagnetic compatibility study of the ClearPEM front-end electronics for simultaneous PET-MR imaging  

E-Print Network [OSTI]

electromagnetic interference (EMI) effects between both systems were evaluated on a 7 T magnet by characterizing. Materials and methods The mutual electromagnetic interference tests between Clear- PEM front-end electronics

Dalang, Robert C.

339

The structure of a combustion front propagating in a fixed bed of crushed oil shale : co-current configuration.  

E-Print Network [OSTI]

??La propagation d'un front de combustion au sein d'un milieu poreux ractif met en uvre des mcanismes thermiques, chimiques et de transfert, avec de forts (more)

Ferreira Martins, Marcio

2008-01-01T23:59:59.000Z

340

FPI (Islamic Defenders' Front): the Making of a Violent Islamist Movement in the New Democracy of Indonesia  

E-Print Network [OSTI]

The current study is aimed at investigating the puzzle of why FPI (Islamic Defenders' Front) has chosen to adopt violent strategies within the democratic context of Indonesia. Much of literature on social movements suggests that democracy...

Munajat

2012-07-16T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

Recursion relations for multi-gluon off-shell amplitudes on the light-front and Wilson lines  

E-Print Network [OSTI]

We analyze the off-shell scattering amplitudes in the framework of the light-front perturbation theory. It is shown that the previously derived recursion relation between tree level off-shell amplitudes in this formalism actually resums whole classes of graphs into a Wilson line. More precisely, we establish a correspondence between the light-front methods for the computation of the off-shell amplitudes and the approach which makes use of the matrix elements of straight infinite Wilson lines, which are manifestly gauge invariant objects. Furthermore, since it is needed to explicitly verify the gauge invariance of light-front amplitudes, it is demonstrated that the Ward identities in this framework need additional instantaneous terms in the light-front graphs.

C. Cruz-Santiago; P. Kotko; A. Stasto

2015-03-06T23:59:59.000Z

342

Recursion relations for multi-gluon off-shell amplitudes on the light-front and Wilson lines  

E-Print Network [OSTI]

We analyze the off-shell scattering amplitudes in the framework of the light-front perturbation theory. It is shown that the previously derived recursion relation between tree level off-shell amplitudes in this formalism actually resums whole classes of graphs into a Wilson line. More precisely, we establish a correspondence between the light-front methods for the computation of the off-shell amplitudes and the approach which makes use of the matrix elements of straight infinite Wilson lines, which are manifestly gauge invariant objects. Furthermore, since it is needed to explicitly verify the gauge invariance of light-front amplitudes, it is demonstrated that the Ward identities in this framework need additional instantaneous terms in the light-front graphs.

Cruz-Santiago, C; Stasto, A

2015-01-01T23:59:59.000Z

343

Two: Standing in Front of the California Ballot-Box Train: The Present and Past of Ballot-Box Budgeting  

E-Print Network [OSTI]

OF THE CALIFORNIA BALLOT TRAIN: THE PRESENT AND PAST OFcan join and jump on the train. No. 2, they can go and stay3, they get in front of the train. And you know what happens

Mitchell, Daniel J.B.; Hirsch, Werner Z.

2006-01-01T23:59:59.000Z

344

Wilson Bull., 110(3), 1998, pp. 352-361 VOCALIZATIONS OF THE BLUE-FRONTED AMAZON  

E-Print Network [OSTI]

of increasing interactions between individuals. The frequency containing the greatest amount of energy-fronted Amazon (Amazona aes- tiva) is a parrot whose distribution extends over northeastern Brazil, Bolivia

Fernndez-Juricic, Esteban

345

Feature identification framework and applications (FIFA)  

E-Print Network [OSTI]

collections that provides a general framework for applications while allowing decisions about the details of document representation and features identification to be deferred to domain specific implementations of that framework. These deferred decisions...

Audenaert, Michael Neal

2006-04-12T23:59:59.000Z

346

Feature Binding and the Hebb Repetition Effect  

E-Print Network [OSTI]

Previous studies have found no evidence that long-term learning of integrated objects and individual features benefit visual short term memory tasks (Logie, Brockmole, & Vandenbroucke, in press; Olson & Jiang, 2004; Treisman, ...

Barrett, Maeve

2008-12-04T23:59:59.000Z

347

Hybrid Solutions to the Feature Interaction Problem  

E-Print Network [OSTI]

Calder,M. Kolberg,M. Magill,E. Marples,D. Reiff-Marganiec,S. Feature Interactions in Telecommunications and Software Systems VII pp 295-312 IOS Press

Calder, M.

348

ECG Feature Extraction Techniques - A Survey Approach  

E-Print Network [OSTI]

ECG Feature Extraction plays a significant role in diagnosing most of the cardiac diseases. One cardiac cycle in an ECG signal consists of the P-QRS-T waves. This feature extraction scheme determines the amplitudes and intervals in the ECG signal for subsequent analysis. The amplitudes and intervals value of P-QRS-T segment determines the functioning of heart of every human. Recently, numerous research and techniques have been developed for analyzing the ECG signal. The proposed schemes were mostly based on Fuzzy Logic Methods, Artificial Neural Networks (ANN), Genetic Algorithm (GA), Support Vector Machines (SVM), and other Signal Analysis techniques. All these techniques and algorithms have their advantages and limitations. This proposed paper discusses various techniques and transformations proposed earlier in literature for extracting feature from an ECG signal. In addition this paper also provides a comparative study of various methods proposed by researchers in extracting the feature from ECG signal.

Karpagachelvi, S; Sivakumar, M

2010-01-01T23:59:59.000Z

349

Front-End Board with Cyclone V as a Test High-Resolution Platform for the Auger-Beyond-2015 Front End Electronics  

E-Print Network [OSTI]

The surface detector (SD) array of the Pierre Auger Observatory containing at present 1680 water Cherenkov detectors spread over an area of 3000 km^2 started to operate since 2004. The currently used Front-End Boards are equipped with no-more produced ACEX and obsolete Cyclone FPGA (40 MSps/15-bit of dynamic range). Huge progress in electronics and new challenges from physics impose a significant upgrade of the SD electronics either to improve a quality of measurements (much higher sampling and much wider dynamic range) or pick-up from a background extremely rare events (new FPGA algorithms based on sophisticated approaches like e.g. spectral triggers or neural networks). Much higher SD sensitivity is necessary to confirm or reject hypotheses critical for a modern astrophysics. The paper presents the Front-End Board (FEB) with the biggest Cyclone V E FPGA 5CEFA9F31I7N, supporting 8 channels sampled with max. 250 MSps @ 14-bit resolution. Considered sampling for the SD is 120 MSps, however, the FEB has been developed with external anti-aliasing filters to keep a maximal flexibility. Six channels are targeted to the SD, two the rest for other experiments like: Auger Engineering Radio Array and additional muon counters. The FEB is an intermediate design pluged-in the actually used Unified Board communicating with micro-controller at 40 MHz, however providing even 250 MSPs sampling with 20-bit dynamic range, equipped in a virtual NIOS processor and supporting 256 MB of SDRAM as well as with an implemented spectral trigger based on the Discrete Cosine Transform for a detection of very inclined "old" showers. The FEB can also support a neural network developing for a detection of "young" showers, potentially generated by neutrinos.

Zbigniew Szadkowski

2014-06-07T23:59:59.000Z

350

The Central American cold surge: an observational analysis of the deep southward penetration of North American cold fronts  

E-Print Network [OSTI]

THE CENTRAL AMERICAN COLD SURGE: AN OBSERVATIONAL ANALYSIS OF THE DEEP SOUTHWARD PENETRATION OF NORTH AMERICAN COLD FRONTS A Thesis by PHILIP JOHN REDING 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 December 1992 Major Subject: Meteorology THE CENTRAL AMERICAN COLD SURGE: AN OBSERVATIONAL ANALYSIS OF THE DEEP SOUTHWARD PENETRATION OF NORTH AMERICAN COLD FRONTS A Thesis by PHILIP...

Reding, Philip John

1992-01-01T23:59:59.000Z

351

Feature extraction for structural dynamics model validation  

SciTech Connect (OSTI)

This study focuses on defining and comparing response features that can be used for structural dynamics model validation studies. Features extracted from dynamic responses obtained analytically or experimentally, such as basic signal statistics, frequency spectra, and estimated time-series models, can be used to compare characteristics of structural system dynamics. By comparing those response features extracted from experimental data and numerical outputs, validation and uncertainty quantification of numerical model containing uncertain parameters can be realized. In this study, the applicability of some response features to model validation is first discussed using measured data from a simple test-bed structure and the associated numerical simulations of these experiments. issues that must be considered were sensitivity, dimensionality, type of response, and presence or absence of measurement noise in the response. Furthermore, we illustrate a comparison method of multivariate feature vectors for statistical model validation. Results show that the outlier detection technique using the Mahalanobis distance metric can be used as an effective and quantifiable technique for selecting appropriate model parameters. However, in this process, one must not only consider the sensitivity of the features being used, but also correlation of the parameters being compared.

Hemez, Francois [Los Alamos National Laboratory; Farrar, Charles [Los Alamos National Laboratory; Park, Gyuhae [Los Alamos National Laboratory; Nishio, Mayuko [UNIV OF TOKYO; Worden, Keith [UNIV OF SHEFFIELD; Takeda, Nobuo [UNIV OF TOKYO

2010-11-08T23:59:59.000Z

352

THE 2011 FEBRUARY 15 X2 FLARE, RIBBONS, CORONAL FRONT, AND MASS EJECTION: INTERPRETING THE THREE-DIMENSIONAL VIEWS FROM THE SOLAR DYNAMICS OBSERVATORY AND STEREO GUIDED BY MAGNETOHYDRODYNAMIC FLUX-ROPE MODELING  

SciTech Connect (OSTI)

The 2011 February 15 X2.2 flare and associated Earth-directed halo coronal mass ejection were observed in unprecedented detail with high resolution in spatial, temporal, and thermal dimensions by the Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory, as well as by instruments on the two STEREO spacecraft, then at near-quadrature relative to the Sun-Earth line. These observations enable us to see expanding loops from a flux-rope-like structure over the shearing polarity-inversion line between the central {delta}-spot groups of AR 11158, developing a propagating coronal front ('EIT wave'), and eventually forming the coronal mass ejection moving into the inner heliosphere. The observations support the interpretation that all of these features, including the 'EIT wave', are signatures of an expanding volume traced by loops (much larger than the flux rope only), surrounded by a moving front rather than predominantly wave-like perturbations; this interpretation is supported by previously published MHD models for active-region and global scales. The lateral expansion of the eruption is limited to the local helmet-streamer structure and halts at the edges of a large-scale domain of connectivity (in the process exciting loop oscillations at the edge of the southern polar coronal hole). The AIA observations reveal that plasma warming occurs within the expansion front as it propagates over quiet Sun areas. This warming causes dimming in the 171 A (Fe IX and Fe X) channel and brightening in the 193 and 211 A (Fe XII-XIV) channels along the entire front, while there is weak 131 A (Fe VIII and Fe XXI) emission in some directions. An analysis of the AIA response functions shows that sections of the front running over the quiet Sun are consistent with adiabatic warming; other sections may require additional heating which MHD modeling suggests could be caused by Joule dissipation. Although for the events studied here the effects of volumetric expansion are much more obvious than true wave phenomena, we discuss how different magnetic environments within and around the erupting region can lead to the signatures of either or both of these aspects.

Schrijver, Carolus J.; Title, Alan M. [Lockheed Martin Advanced Technology Center, 3251 Hanover Street, Palo Alto, CA 94304 (United States); Aulanier, Guillaume; Pariat, Etienne; Delannee, Cecile, E-mail: schrijver@lmsal.com, E-mail: title@lmsal.com, E-mail: guillaume.aulanier@obspm.fr, E-mail: etienne.pariat@obspm.fr, E-mail: ceaulanier@voila.fr [LESIA, Observatoire de Paris, CNRS, UPMC, Universite Paris Diderot, 5 Place Jules Janssen, 92190 Meudon (France)

2011-09-10T23:59:59.000Z

353

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

E-Print Network [OSTI]

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

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

2014-06-16T23:59:59.000Z

354

On the ion front of a plasma expanding into a vacuum  

SciTech Connect (OSTI)

Calculations are reported on the expansion of a plasma into a vacuum, using a model of cold ions and Boltzmann electrons. The initial distribution of the ions at the edge of the plasma greatly affects the subsequent expansion. An initial abrupt drop of ion density leads to an expansion in which the abrupt drop is maintained. A finite slope, however, leads to the formation of a peak of ion density at the ion front. The subsequent behaviour may lead to wave breaking and the formation of multi-valued ion velocity distributions.

Allen, J. E. [OCIAM, Mathematical Institute, University of Oxford, Oxford OX2 6GG (United Kingdom) [OCIAM, Mathematical Institute, University of Oxford, Oxford OX2 6GG (United Kingdom); University College, Oxford, Oxford OX1 4BH (United Kingdom); Perego, M. [Department of Scientific Computing, Florida State University, Tallahassee, Florida 32306 (United States)] [Department of Scientific Computing, Florida State University, Tallahassee, Florida 32306 (United States)

2014-03-15T23:59:59.000Z

355

Light-front quantum chromodynamics: A framework for the analysis of hadron physics  

SciTech Connect (OSTI)

An outstanding goal of physics is to find solutions that describe hadrons in the theory of strong interactions, Quantum Chromodynamics (QCD). For this goal, the light-front Hamiltonian formulation of QCD (LFQCD) is a complementary approach to the well-established lattice gauge method. LFQCD offers access to the hadrons nonperturbative quark and gluon amplitudes, which are directly testable in experiments at forefront facilities. We present an overview of the promises and challenges of LFQCD in the context of unsolved issues in QCD that require broadened and accelerated investigation. We identify specific goals of this approach and address its quantifiable uncertainties.

Bakker, B. L.G.; Bassetto, A.; Brodsky, S. J.; Broniowski, W.; Dalley, S.; Frederico, T.; Glazek, S. D.; Hiller, J. R.; Ji, C. -R.; Karmanov, V.; Kulshreshtha, D.; Mathiot, J. -F.; Melnitchouk, W.; Miller, G. A.; Papavassiliou, J.; Polyzou, W. N.; Stefanis, N.; Vary, J. P.; Ilderton, A.; Heinzl, T.

2014-06-01T23:59:59.000Z

356

Quantum feedback cooling of a single trapped ion in front of a mirror  

E-Print Network [OSTI]

We develop a theory of quantum feedback cooling of a single ion trapped in front of a mirror. By monitoring the motional sidebands of the light emitted into the mirror mode we infer the position of the ion, and act back with an appropriate force to cool the ion. We derive a feedback master equation along the lines of the quantum feedback theory developed by Wiseman and Milburn, which provides us with cooling times and final temperatures as a function of feedback gain and various system parameters.

V. Steixner; P. Rabl; P. Zoller

2005-06-22T23:59:59.000Z

357

A dynamical model for longitudinal wave functions in light-front holographic QCD  

E-Print Network [OSTI]

We construct a Schrodinger-like equation for the longitudinal wave function of a meson in the valence qq-bar sector, based on the 't Hooft model for large-N two-dimensional QCD, and combine this with the usual transverse equation from light-front holographic QCD, to obtain a model for mesons with massive quarks. The computed wave functions are compared with the wave function ansatz of Brodsky and De Teramond and used to compute decay constants and parton distribution functions. The basis functions used to solve the longitudinal equation may be useful for more general calculations of meson states in QCD.

S. S. Chabysheva; J. R. Hiller

2013-07-14T23:59:59.000Z

358

Feature recognition applications in mesh generation  

SciTech Connect (OSTI)

The use of feature recognition as part of an overall decomposition-based hexahedral meshing approach is described in this paper. The meshing approach consists of feature recognition, using a c-loop or hybrid c-loop method, and the use of cutting surfaces to decompose the solid model. These steps are part of an iterative process, which proceeds either until no more features can be recognized or until the model has been completely decomposed into meshable sub-volumes. This method can greatly reduce the time required to generate an all-hexahedral mesh, either through the use of more efficient meshing algorithms on more of the geometry or by reducing the amount of manual decomposition required to mesh a volume.

Tautges, T.J. [Sandia National Labs., Albuquerque, NM (United States); Liu, S.S.; Lu, Y.; Kraftcheck, J.; Gadh, R. [Wisconsin Univ., Madison, WI (United States). Mechanical Engineering Dept.

1997-06-01T23:59:59.000Z

359

Interferometric adaptive optics for high power laser pointing, wave-front control and phasing  

SciTech Connect (OSTI)

Implementing the capability to perform fast ignition experiments, as well as, radiography experiments on the National Ignition Facility (NIF) places stringent requirements on the control of each of the beam's pointing and overall wavefront quality. One quad of the NIF beams, 4 beam pairs, will be utilized for these experiments and hydrodynamic and particle-in-cell simulations indicate that for the fast ignition experiments, these beams will be required to deliver 50% (4.0 kJ) of their total energy (7.96 kJ) within a 40 {micro}m diameter spot at the end of a fast ignition cone target. This requirement implies a stringent pointing and overall phase conjugation error budget on the adaptive optics system used to correct these beam lines. The overall encircled energy requirement is more readily met by phasing of the beams in pairs but still requires high Strehl ratios, Sr, and rms tip/tilt errors of approximately one {micro}rad. To accomplish this task we have designed an interferometric adaptive optics system capable of beam pointing, high Strehl ratio and beam phasing with a single pixilated MEMS deformable mirror and interferometric wave-front sensor. We present the design of a testbed used to evaluate the performance of this wave-front sensor below along with simulations of its expected performance level.

Baker, K L; Stappaerts, E A; Homoelle, D C; Henesian, M A; Bliss, E S; Siders, C W; Barty, C J

2009-01-21T23:59:59.000Z

360

Status and specifications of a Project X front-end accelerator test facility at Fermilab  

SciTech Connect (OSTI)

This paper describes the construction and operational status of an accelerator test facility for Project X. The purpose of this facility is for Project X component development activities that benefit from beam tests and any development activities that require 325 MHz or 650 MHz RF power. It presently includes an H- beam line, a 325 MHz superconducting cavity test facility, a 325 MHz (pulsed) RF power source, and a 650 MHz (CW) RF power source. The paper also discusses some specific Project X components that will be tested in the facility. Fermilab's future involves new facilities to advance the intensity frontier. In the early 2000's, the vision was a pulsed, superconducting, 8 GeV linac capable of injecting directly into the Fermilab Main Injector. Prototyping the front-end of such a machine started in 2005 under a program named the High Intensity Neutrino Source (HINS). While the HINS test facility was being constructed, the concept of a new, more versatile accelerator for the intensity frontier, now called Project X, was forming. This accelerator comprises a 3 GeV CW superconducting linac with an associated experimental program, followed by a pulsed 8 GeV superconducting linac to feed the Main Injector synchrotron. The CW Project X design is now the model for Fermilab's future intensity frontier program. Although CW operation is incompatible with the original HINS front-end design, the installation remains useful for development and testing many Project X components.

Steimel, J.; Webber, R.; Madrak, R.; Wildman, D.; Pasquinelli, R.; Evans-Peoples, E.; /Fermilab

2011-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

Low temperature front surface passivation of interdigitated back contact silicon heterojunction solar cell  

SciTech Connect (OSTI)

The interdigitated back contact silicon heterojunction (IBC-SHJ) solar cell requires a low temperature front surface passivation/anti-reflection structure. Conventional silicon surface passivation using SiO2 or a-SiNx is performed at temperature higher than 400C, which is not suitable for the IBC-SHJ cell. In this paper, we propose a PECVD a-Si:H/a-SiNx:H/a-SiC:H stack structure to passivate the front surface of crystalline silicon at low temperature. The optical properties and passivation quality of this structure are characterized and solar cells using this structure are fabricated. With 2 nm a-Si:H layer, the stack structure exhibits stable passivation with effective minority carrier lifetime higher than 2 ms, and compatible with IBC-SHJ solar cell processing. A critical advantage of this structure is that the SiC allows it to be HF resistant, thus it can be deposited as the first step in the process. This protects the a-Si/c-Si interface and maintains a low surface recombination velocity.

Shu, Brent; Das, Ujjwal; Jani, Omkar; Hegedus, Steve; Birkmire, Robert

2009-06-08T23:59:59.000Z

362

Novel Approach for Selective Emitter Formation and Front Side Metallization of Crystalline Silicon Solar Cells  

SciTech Connect (OSTI)

In this project we will explore the possibility of forming the front side metallization and selective emitter layer for the crystalline silicon solar cells through using selective laser ablation to create contact openings on the front surface and a screen printer to make connections with conductive paste. Using this novel approach we expect to reduce the specific contact resistance of the silver gridlines by about one order of magnitude compared to the state-of-art industrial crystalline silicon solar cells to below 1 m??cm2, and use lightly doped n+ emitter layer with sheet resistance of not smaller than 100 ?/?. This represents an enabling improvement on crystalline silicon solar cell performance and can increase the absolute efficiency of the solar cell by about 1%. In this scientific report we first present our result on the selective laser ablation of the nitride layer to make contact openings. Then we report our work on the solar cell fabrication by using the laser ablated contact openings with self-doping paste. Through various electrical property characterization and SIMS analysis, the factors limiting the cell performance have been discussed. While through this proof-of-concept project we could not reach the target on cell efficiency improvement, the process to fabricate 125mm full-sized silicon solar cells using laser ablation and self-doping paste has been developed, and a much better understanding of technical challenges has been achieved. Future direction to realize the potential of the new technology has been clearly defined.

Baomin Xu

2010-07-28T23:59:59.000Z

363

Design of a Portable Test Facility for the ATLAS Tile Calorimeter Front-End Electronics Verification  

E-Print Network [OSTI]

An FPGA-based motherboard with an embedded hardware processor is used to implement a portable test- bench for the full certification of Tile Calorimeter front-end electronics in the ATLAS experiment at CERN. This upgrade will also allow testing future versions of the TileCal read-out electronics as well. Because of its lightness the new facility is highly portable, allowing on-detector validation using sophisticated algorithms. The new system comprises a front-end GUI running on an external portable computer which controls the motherboard. It also includes several dedicated daughter-boards that exercise the different specialized functionalities of the system. Apart from being used to evaluate different technologies for the future upgrades, it will be used to certify the consolidation of the electronics by identifying low frequency failures. The results of the tests presented here show that new system is well suited for the 2013 ATLAS Long Shutdown. We discuss all requirements necessary to give full confidence...

Kim, HY; The ATLAS collaboration; Carrio, F; Moreno, P; Masike, T; Reed, R; Sandrock, C; Schettino, V; Shalyugin, A; Solans, C; Souza, J; Suter, R; Usai, G; Valero, A

2013-01-01T23:59:59.000Z

364

Wave front-ray synthesis for solving the multidimensional quantum Hamilton-Jacobi equation  

SciTech Connect (OSTI)

A Cauchy initial-value approach to the complex-valued quantum Hamilton-Jacobi equation (QHJE) is investigated for multidimensional systems. In this approach, ray segments foliate configuration space which is laminated by surfaces of constant action. The QHJE incorporates all quantum effects through a term involving the divergence of the quantum momentum function (QMF). The divergence term may be expressed as a sum of two terms, one involving displacement along the ray and the other incorporating the local curvature of the action surface. It is shown that curvature of the wave front may be computed from coefficients of the first and second fundamental forms from differential geometry that are associated with the surface. Using the expression for the divergence, the QHJE becomes a Riccati-type ordinary differential equation (ODE) for the complex-valued QMF, which is parametrized by the arc length along the ray. In order to integrate over possible singularities in the QMF, a stable and accurate Moebius propagator is introduced. This method is then used to evolve rays and wave fronts for four systems in two and three dimensions. From the QMF along each ray, the wave function can be easily computed. Computational difficulties that may arise are described and some ways to circumvent them are presented.

Wyatt, Robert E.; Chou, Chia-Chun [Institute for Theoretical Chemistry and Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712 (United States)

2011-08-21T23:59:59.000Z

365

Direct numerical simulation of ignition front propagation in a constant volume with temperature inhomogeneities. I. Fundamental analysis and diagnostics  

SciTech Connect (OSTI)

The influence of thermal stratification on autoignition at constant volume and high pressure is studied by direct numerical simulation (DNS) with detailed hydrogen/air chemistry with a view to providing better understanding and modeling of combustion processes in homogeneous charge compression-ignition engines. Numerical diagnostics are developed to analyze the mode of combustion and the dependence of overall ignition progress on initial mixture conditions. The roles of dissipation of heat and mass are divided conceptually into transport within ignition fronts and passive scalar dissipation, which modifies the statistics of the preignition temperature field. Transport within ignition fronts is analyzed by monitoring the propagation speed of ignition fronts using the displacement speed of a scalar that tracks the location of maximum heat release rate. The prevalence of deflagrative versus spontaneous ignition front propagation is found to depend on the local temperature gradient, and may be identified by the ratio of the instantaneous front speed to the laminar deflagration speed. The significance of passive scalar mixing is examined using a mixing timescale based on enthalpy fluctuations. Finally, the predictions of the multizone modeling strategy are compared with the DNS, and the results are explained using the diagnostics developed. (author)

Chen, Jacqueline H.; Hawkes, Evatt R.; Sankaran, Ramanan [Reacting Flow Research Department, Combustion Research Facility, Sandia National Laboratories, P.O. Box 969 MS 9051, Livermore, CA 94551-0969 (United States); Mason, Scott D. [Lockheed Martin Corporation, Sunnyvale, CA 94089 (United States); Im, Hong G. [Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109-2125 (United States)

2006-04-15T23:59:59.000Z

366

Dynamical Expansion of Ionization and Dissociation Front around a Massive Star. I. A Mode of Triggered Star Formation  

E-Print Network [OSTI]

We analyze the dynamical expansion of the HII region and outer photodissociation region (PDR) around a massive star by solving the UV and FUV radiation transfer and the thermal and chemical processes in a time-dependent hydrodynamics code. We focus on the physical structure of the shell swept up by the shock front (SF) preceding the ionization front (IF). After the IF reaches the initial Stromgren radius, the SF emerges in front of the IF and the geometrically thin shell bounded with the IF and the SF is formed. The gas density inside the shell is about 10-100 times as high as the ambient gas density. Initially the dissociation fronts expands faster than IF and the PDR is formed outside the HII region. Thereafter the IF and SF gradually overtakes the proceeding dissociation fronts (DFs), and eventually DFs are taken in the shell. The chemical composition within the shell is initially atomic, but hydrogen and carbon monoxide molecules are gradually formed. This is partly because the IF and SF overtake DFs and SF enters the molecular region, and partly because the reformation timescales of the molecules become shorter than the dynamical timescale. The gas shell becomes dominated by the molecular gas by the time of gravitational fragmentation, which agrees with some recent observations. A simple estimation of star formation rate in the shell can provide a significant star formation rate in our galaxy.

Takashi Hosokawa; Shu-ichiro Inutsuka

2005-01-08T23:59:59.000Z

367

Mobile Communities Requirements and Features for Success  

E-Print Network [OSTI]

Mobile Communities ­ Requirements and Features for Success Sarah Denis Heldt Media Informatics LMU.broll@ifi.lmu.de Philipp Lehmann Burda Wireless GmbH philipp.lehmann@burda.com ABSTRACT Advancements in mobile technologies and decreasing charges are starting to leverage the mobile usage of the internet and its applications. This paper

368

Convex Principal Feature Selection Mahdokht Masaeli1  

E-Print Network [OSTI]

Advertising Sciences, Yahoo! Labs, Silicon Valley, CA, USA 3 Computer Aided Diagnosis and Therapy, Siemens Medical Solutions, USA {masaeli.m, yan.y, cui.yi}@neu.edu, glenn.fung@siemens.com, jdy transformation is achieved. However, true feature selection may not be achieved as non-sparse coefficients may

Dy, Jennifer G.

369

Feature-oriented Runtime Adaptation Mario Pukall  

E-Print Network [OSTI]

QuickSort (dark-gray background). Figure 1: Feature Evolution in a DBMS SPL. Having recreated of a DBMS1 SPL, is replaced by fea- ture QuickSort) does not aect the running program. Usu- ally, applying (according to the modi#12;cations made in the SPL). For in- stance, the changes within the DBMS SPL require

Cazzola, Walter

370

FEATURE ARTICLE 2 Kunde Hospital: Nepal  

E-Print Network [OSTI]

FEATURE ARTICLE 2 Kunde Hospital: Nepal WORK IN PROGRESS 4 Public Health in Ceylon Medical research of the Mt Everest area in Nepal who have played such an important role in Himalayan mountaineering century the region became incorporated into the Gorkha kingdom that now forms the modern nation of Nepal

Rambaut, Andrew

371

ADVANCED DIRECT MANIPULATION OF FEATURE MODELS  

E-Print Network [OSTI]

ADVANCED DIRECT MANIPULATION OF FEATURE MODELS Rafael Bidarra, Alex Noort Faculty of Electrical validity maintenance. In particular, it offers a powerful combination of various 3D handles for real and are functionally signifi- cant for some product life-cycle phase" (Bidarra and Bronsvoort, 2000). In contrast

Bidarra, Rafael

372

Features . . . Cover Crop Value to Cotton  

E-Print Network [OSTI]

Features . . . Cotton Cover Crop Value to Cotton Cotton Price and Rotation 32:12 December 2008 #12;Cotton Price and Rotation Agronomy Notes Page 2 Cotton price has been low. Either peanut or soybean should be rotated with cotton, corn, or other grasses. However, with cotton

Watson, Craig A.

373

Representing mechanical assemblies with features and mating conditions  

E-Print Network [OSTI]

A high-level product representation has been developed and implemented, using design features for part description and mating conditions between features for the relationships among parts. The underlying ideas are that features are necessary...

Qamar, Sayyad Zahid

1993-01-01T23:59:59.000Z

374

Events & Topics in Renewable Energy & the Environment featuring...  

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

Events & Topics in Renewable Energy & the Environment featuring Chenyang Lu Events & Topics in Renewable Energy & the Environment featuring Chenyang Lu Smart Buildings with...

375

automatic archaeological feature: Topics by E-print Network  

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

Nancy2 University NASA Ames robots to automatically detect features. Hid- den Markov Models have been used for a long time in pattern 28 Adaptive Automatic Facial Feature...

376

algorithm based feature: Topics by E-print Network  

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

feature level fusion framework using two well- known biometric cryptosystems, namely, fuzzy vault 60 A stochastic algorithm for feature selection in pattern recognition...

377

Scour of simulated Gulf Coast sand beaches due to wave action in front of sea walls and dune barriers  

E-Print Network [OSTI]

for the degree of MASTER OF SCIENCE May 1971 Ma)or Sub)ect: Civil Engineering SCOUR OF SIM(JLATED GULF COAST SAND BEACHES DUE TO WAVE ACTION IN FRONT OF SEA WALLS AND DUNE BARRIERS Q m Q F z A Thesis z m Q C by CHARLES BURGESS CHESNUTT L' m ) m... angle 53 LIST OF FIGURES (CONTINUED) Figure Page 15 Scour depth at the sea wall versus beach slope for constant wave steepness and varying sea wall angle 54 INTRODUCTION The problem of scour in front of sea walls has plagued coastal engineers...

Chesnutt, Charles Burgess

1971-01-01T23:59:59.000Z

378

A 200-MHz fully-differential CMOS front-end with an on-chip inductor for magnetic resonance imaging  

E-Print Network [OSTI]

A 200-MHZ FULLY-DIFFERENTIAL CMOS FRONT-END WITH AN ON-CHIP INDUCTOR FOR MAGNETIC RESONANCE IMAGING A Thesis by JULIO ENRIQUE AYALA II 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 December 2005 Major Subject: Electrical Engineering A 200-MHZ FULLY-DIFFERENTIAL CMOS FRONT-END WITH AN ON-CHIP INDUCTOR FOR MAGNETIC RESONANCE IMAGING A Thesis by JULIO ENRIQUE AYALA II Submitted to the Office of Graduate...

Ayala, Julio Enqrique, II

2007-04-25T23:59:59.000Z

379

Generalizing the flash technique in the front-face configuration to measure the thermal diffusivity of semitransparent solids  

SciTech Connect (OSTI)

In this work, we have extended the front-face flash method to retrieve simultaneously the thermal diffusivity and the optical absorption coefficient of semitransparent plates. A complete theoretical model that allows calculating the front surface temperature rise of the sample has been developed. It takes into consideration additional effects, such as multiple reflections of the heating light beam inside the sample, heat losses by convection and radiation, transparency of the sample to infrared wavelengths, and heating pulse duration. Measurements performed on calibrated solids, covering a wide range of absorption coefficients (from transparent to opaque) and thermal diffusivities, validate the proposed method.

Pech-May, Nelson Wilbur [Departamento de Fsica Aplicada I, Escuela Tcnica Superior de Ingeniera, Universidad del Pas Vasco UPV/EHU, Alameda Urquijo s/n, 48013 Bilbao (Spain); Department of Applied Physics, CINVESTAV Unidad Mrida, carretera Antigua a Progreso km6, A.P. 73 Cordemex, Mrida Yucatn 97310, Mxico (Mexico); Mendioroz, Arantza; Salazar, Agustn, E-mail: agustin.salazar@ehu.es [Departamento de Fsica Aplicada I, Escuela Tcnica Superior de Ingeniera, Universidad del Pas Vasco UPV/EHU, Alameda Urquijo s/n, 48013 Bilbao (Spain)

2014-10-15T23:59:59.000Z

380

Soft Multiple Winners for Sparse Feature Extraction  

E-Print Network [OSTI]

A simple and computationally inexpensive neural network method for generating sparse representations is presented. The network has a single layer of linear neurons and, on top of it, a mechanism, which assigns a winning strength for each neuron. Both input and output are real valued in contrast to many earlier methods, where either input or output must have been binary valued. Also, the sum of winning strengths does not have to be normalized as in some other approaches. The ability of the algorithm to find meaningful features is demonstrated in a simulation with images of handwritten numerals. 1. Introduction The objective of a feature extraction system is to refine data in such a way that further processing becomes easier. In classification, such a system has two basic goals. One is to remove redundancies from the data. This helps cutting down computational costs later on. Another, contradictory goal is to discriminate data, which helps in distinguishing between similar inputs. A fe...

Note: This page contains sample records for the topic "features front wheel" 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

LEDSGP/tools/features | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to:46 - 429 ThrottledInformationparticipants < LEDSGP‎ |features < LEDSGP‎ |

382

Communicating@theWheel.pub  

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

is essential to making sure that you are seen. Preoccupied, or momentarily distracted drivers or pedestrians can be totally unaware of your presence. Gently tap on the horn to get...

383

Review of input stages used in front end electronics for particle detectors  

E-Print Network [OSTI]

In this paper we present noise analysis of the input stages most commonly used in front end electronics for particle detectors. Analysis shows the calculation of the input referenced noise related to the active devices. It identifies the type, parallel or series, of the equivalent noise sources related to the input transistors, which is the important input for the further choice of the signal processing method. Moreover we calculate the input impedance of amplifiers employed in applications where the particle detector is connected to readout electronics by means of transmission line. We present schematics, small signal models,a complete set of equations, and results of the major steps of calculations for all discussed circuits.

Kaplon, J

2015-01-01T23:59:59.000Z

384

Evaluation of a front-end ASIC for the readout of PMTs in large dynamic range  

E-Print Network [OSTI]

The Large High Altitude Air Shower Observatory (LHAASO) project has been proposed for the survey and study of cosmic rays. In the LHAASO project, the Water Cherenkov Detector Array (WCDA) is one of major detectors for searching gamma ray sources. A Charge-to-Time Convertor (QTC) ASIC (Application Specification Integrated Circuit) fabricated in Global Foundry 0.35 {\\mu}m CMOS technology, has been developed for readout of Photomultiplier Tubes (PMTs) in the WCDA. This paper focuses on the evaluation of this front-end readout ASIC performance. Test results indicate that the time resolution is better than 400 ps and the charge resolution is better than 1% with large input signals and remains better than 15% @ 1 Photo Electron (P.E.), both beyond the application requirement. Moreover, this ASIC has a weak ambient temperature dependence, low input rate dependence and high channel-to-channel isolation.

Wu, Weihao; Liang, Yu; Yu, Li; Liu, Jianfeng; Liu, Shubin; An, Qi

2015-01-01T23:59:59.000Z

385

Evaluation of a front-end ASIC for the readout of PMTs in large dynamic range  

E-Print Network [OSTI]

The Large High Altitude Air Shower Observatory (LHAASO) project has been proposed for the survey and study of cosmic rays. In the LHAASO project, the Water Cherenkov Detector Array (WCDA) is one of major detectors for searching gamma ray sources. A Charge-to-Time Convertor (QTC) ASIC (Application Specification Integrated Circuit) fabricated in Global Foundry 0.35 {\\mu}m CMOS technology, has been developed for readout of Photomultiplier Tubes (PMTs) in the WCDA. This paper focuses on the evaluation of this front-end readout ASIC performance. Test results indicate that the time resolution is better than 400 ps and the charge resolution is better than 1% with large input signals and remains better than 15% @ 1 Photo Electron (P.E.), both beyond the application requirement. Moreover, this ASIC has a weak ambient temperature dependence, low input rate dependence and high channel-to-channel isolation.

Weihao Wu; Lei Zhao; Yu Liang; Li Yu; Jianfeng Liu; Shubin Liu; Qi An

2015-02-05T23:59:59.000Z

386

Pauli-Villars regularization of field theories on the light front  

SciTech Connect (OSTI)

Four-dimensional quantum field theories generally require regularization to be well defined. This can be done in various ways, but here we focus on Pauli-Villars (PV) regularization and apply it to nonperturbative calculations of bound states. The philosophy is to introduce enough PV fields to the Lagrangian to regulate the theory perturbatively, including preservation of symmetries, and assume that this is sufficient for the nonperturbative case. The numerical methods usually necessary for nonperturbative bound-state problems are then applied to a finite theory that has the original symmetries. The bound-state problem is formulated as a mass eigenvalue problem in terms of the light-front Hamiltonian. Applications to quantum electrodynamics are discussed.

Hiller, John R. [Department of Physics, University of Minnesota-Duluth, Duluth, Minnesota 55812 (United States)

2010-12-22T23:59:59.000Z

387

Design and construction of the front-end electronics data acquisition for the SLD CRID  

SciTech Connect (OSTI)

This paper describes the front-end electronics for the Cherenkov Ring Imaging Detector (CRID) of the SLD at the Stanford Linear Accelerator Center. The design philosophy and implementation are discussed with emphasis on the low-noise hybrid amplifiers, signal processing and data acquisition electronics. The system receives signals from a highly efficient single-photo electron detector. These signals are shaped and amplified before being stored in an analog memory and processed by a digitizing system. The data from several ADCs are multiplexed and transmitted via fiber optics to the SLD FASTBUS system. The authors highlight the technologies used, as well as the space, power dissipation, and environmental constraints imposed on the system.

Hoeflich, J.; McShurley, D.; Marshall, D.; Oxoby, G.; Shapiro, S.; Stiles, P. (Stanford Linear Accelerator Center, Menlo Park, CA (United States)); Spencer, E. (California Univ., Santa Cruz, CA (United States). Inst. for Particle Physics)

1991-04-01T23:59:59.000Z

388

Local stress-induced effects on AlGaAs/AlOx oxidation front shape  

SciTech Connect (OSTI)

The lateral oxidation of thick AlGaAs layers (>500?nm) is studied. An uncommon shape of the oxide tip is evidenced and attributed to the embedded stress distribution, inherent to the oxidation reaction. Experimental and numerical studies of the internal strain in oxidized Al{sub x}Ga{sub 1?x}As/GaAs structures were carried out by dark-field electron holography and finite element methods. A mapping of the strain distribution around the AlGaAs/oxide interface demonstrates the main role of internal stress on the shaping of the oxide front. These results demonstrate the high relevance of strain in oxide-confined III-V devices, in particular, with over-500-nm thick AlOx confinement layers.

Chouchane, F.; Almuneau, G., E-mail: almuneau@laas.fr; Arnoult, A.; Lacoste, G.; Fontaine, C. [CNRS, LAAS, 7 avenue du colonel Roche, F-31400 Toulouse (France); Univ de Toulouse, UPS, LAAS, F-31400 Toulouse (France); Cherkashin, N. [Univ de Toulouse, UPS, LAAS, F-31400 Toulouse (France); CNRS, CEMES, 29 Rue Jeanne Marvig, 31055 Toulouse Cedex 4 (France)

2014-07-28T23:59:59.000Z

389

GYROSURFING ACCELERATION OF IONS IN FRONT OF EARTH's QUASI-PARALLEL BOW SHOCK  

SciTech Connect (OSTI)

It is well known that shocks in space plasmas can accelerate particles to high energies. However, many details of the shock acceleration mechanism are still unknown. A critical element of shock acceleration is the injection problem; i.e., the presence of the so called seed particle population that is needed for the acceleration to work efficiently. In our case study, we present for the first time observational evidence of gyroresonant surfing acceleration in front of Earth's quasi-parallel bow shock resulting in the appearance of the long-suspected seed particle population. For our analysis, we use simultaneous multi-spacecraft measurements provided by the Cluster spacecraft ion (CIS), magnetic (FGM), and electric field and wave instrument (EFW) during a time period of large inter-spacecraft separation distance. The spacecraft were moving toward the bow shock and were situated in the foreshock region. The results show that the gyroresonance surfing acceleration takes place as a consequence of interaction between circularly polarized monochromatic (or quasi-monochromatic) transversal electromagnetic plasma waves and short large amplitude magnetic structures (SLAMSs). The magnetic mirror force of the SLAMS provides the resonant conditions for the ions trapped by the waves and results in the acceleration of ions. Since wave packets with circular polarization and different kinds of magnetic structures are very commonly observed in front of Earth's quasi-parallel bow shock, the gyroresonant surfing acceleration proves to be an important particle injection mechanism. We also show that seed ions are accelerated directly from the solar wind ion population.

Kis, Arpad; Lemperger, Istvan; Wesztergom, Viktor [Research Centre for Astronomy and Earth Sciences, Geodetic and Geophysical Institute, Sopron (Hungary); Agapitov, Oleksiy; Krasnoselskikh, Vladimir [LPC2E/CNRS, F-45071 Orleans (France); Khotyaintsev, Yuri V. [Swedish Institute of Space Physics, SE- 751 21 Uppsala (Sweden); Dandouras, Iannis, E-mail: akis@ggki.hu, E-mail: Kis.Arpad@csfk.mta.hu [CESR, F-31028 Toulouse (France)

2013-07-01T23:59:59.000Z

390

Scintillation counter and wire chamber front end modules for high energy physics experiments  

SciTech Connect (OSTI)

This document describes two front-end modules developed for the proposed MIPP upgrade (P-960) experiment at Fermilab. The scintillation counter module was developed for the Plastic Ball detector time and charge measurements. The module has eight LEMO 00 input connectors terminated with 50 ohms and accepts negative photomultiplier signals in the range 0.25...1000 pC with the maximum input voltage of 4.0 V. Each input has a passive splitter with integration and differentiation times of {approx}20 ns. The integrated portion of the signal is digitized at 26.55 MHz by Analog Devices AD9229 12-bit pipelined 4-channel ADC. The differentiated signal is discriminated for time measurement and sent to one of the four TMC304 inputs. The 4-channel TMC304 chip allows high precision time measurement of rising and falling edges with {approx}100 ps resolution and has internal digital pipeline. The ADC data is also pipelined which allows deadtime-less operation with trigger decision times of {approx}4 {micro}s. The wire chamber module was developed for MIPP EMCal detector charge measurements. The 32-channel digitizer accepts differential analog signals from four 8-channel integrating wire amplifiers. The connection between wire amplifier and digitizer is provided via 26-wire twist-n-flat cable. The wire amplifier integrates input wire current and has sensitivity of 275 mV/pC and the noise level of {approx}0.013 pC. The digitizer uses the same 12-bit AD9229 ADC chip as the scintillator counter module. The wire amplifier has a built-in test pulser with a mask register to provide testing of the individual channels. Both modules are implemented as a 6Ux220 mm VME size board with 48-pin power connector. A custom europack (VME) 21-slot crate is developed for housing these front-end modules.

Baldin, Boris; DalMonte, Lou; /Fermilab

2011-01-01T23:59:59.000Z

391

Measures of the environmental footprint of the front end of the nuclear fuel cycle  

SciTech Connect (OSTI)

Previous estimates of environmental impacts associated with the front end of the nuclear fuel cycle (FEFC) have focused primarily on energy consumption and CO2 emissions. Results have varied widely. This work builds upon reports from operating facilities and other primary data sources to build a database of front end environmental impacts. This work also addresses land transformation and water withdrawals associated with the processes of the FEFC. These processes include uranium extraction, conversion, enrichment, fuel fabrication, depleted uranium disposition, and transportation. To allow summing the impacts across processes, all impacts were normalized per tonne of natural uranium mined as well as per MWh(e) of electricity produced, a more conventional unit for measuring environmental impacts that facilitates comparison with other studies. This conversion was based on mass balances and process efficiencies associated with the current once-through LWR fuel cycle. Total energy input is calculated at 8.7 x 10- 3 GJ(e)/MWh(e) of electricity and 5.9 x 10- 3 GJ(t)/MWh(e) of thermal energy. It is dominated by the energy required for uranium extraction, conversion to fluoride compound for subsequent enrichment, and enrichment. An estimate of the carbon footprint is made from the direct energy consumption at 1.7 kg CO2/MWh(e). Water use is likewise dominated by requirements of uranium extraction, totaling 154 L/MWh(e). Land use is calculated at 8 x 10- 3 m2/MWh(e), over 90% of which is due to uranium extraction. Quantified impacts are limited to those resulting from activities performed within the FEFC process facilities (i.e. within the plant gates). Energy embodied in material inputs such as process chemicals and fuel cladding is identified but not explicitly quantified in this study. Inclusion of indirect energy associated with embodied energy as well as construction and decommissioning of facilities could increase the FEFC energy intensity estimate by a factor of up to 2.

E. Schneider; B. Carlsen; E. Tavrides; C. van der Hoeven; U. Phathanapirom

2013-11-01T23:59:59.000Z

392

abcn front-end chip: Topics by E-print Network  

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

for managing such data. However, this database should be completely integrated into the SCADA framework, it should be accessible from the SCADA and the SCADA features, e.g....

393

Cast Stone Oxidation Front Evaluation: Preliminary Results For Samples Exposed To Moist Air  

SciTech Connect (OSTI)

The rate of oxidation is important to the long-term performance of reducing salt waste forms because the solubility of some contaminants, e.g., technetium, is a function of oxidation state. TcO{sub 4}{sup ?} in the salt solution is reduced to Tc(IV) and has been shown to react with ingredients in the waste form to precipitate low solubility sulfide and/or oxide phases. Upon exposure to oxygen, the compounds containing Tc(IV) oxidize to the pertechnetate ion, Tc(VII)O{sub 4}{sup ?}, which is very soluble. Consequently the rate of technetium oxidation front advancement into a monolith and the technetium leaching profile as a function of depth from an exposed surface are important to waste form performance and ground water concentration predictions. An approach for measuring contaminant oxidation rate (effective contaminant specific oxidation rate) based on leaching of select contaminants of concern is described in this report. In addition, the relationship between reduction capacity and contaminant oxidation is addressed. Chromate (Cr(VI) was used as a non-radioactive surrogate for pertechnetate, Tc(VII), in Cast Stone samples prepared with 5 M Simulant. Cast Stone spiked with pertechnetate was also prepared and tested. Depth discrete subsamples spiked with Cr were cut from Cast Stone exposed to Savannah River Site (SRS) outdoor ambient temperature fluctuations and moist air. Depth discrete subsamples spiked with Tc-99 were cut from Cast Stone exposed to laboratory ambient temperature fluctuations and moist air. Similar conditions are expected to be encountered in the Cast Stone curing container. The leachability of Cr and Tc-99 and the reduction capacities, measured by the Angus-Glasser method, were determined for each subsample as a function of depth from the exposed surface. The results obtained to date were focused on continued method development and are preliminary and apply to the sample composition and curing / exposure conditions described in this report. The Cr oxidation front (depth to which soluble Cr was detected) for the Cast Stone sample exposed for 68 days to ambient outdoor temperatures and humid air (total age of sample was 131 days) was determined to be about 35 mm below the top sample surface exposed. The Tc oxidation front, depth at which Tc was insoluble, was not determined. Interpretation of the results indicates that the oxidation front is at least 38 mm below the exposed surface. The sample used for this measurement was exposed to ambient laboratory conditions and humid air for 50 days. The total age of the sample was 98 days. Technetium appears to be more easily oxidized than Cr in the Cast Stone matrix. The oxidized forms of Tc and Cr are soluble and therefore leachable. Longer exposure times are required for both the Cr and Tc spiked samples to better interpret the rate of oxidation. Tc spiked subsamples need to be taken further from the exposed surface to better define and interpret the leachable Tc profile. Finally Tc(VII) reduction to Tc(IV) appears to occur relatively fast. Results demonstrated that about 95 percent of the Tc(VII) was reduced to Tc(IV) during the setting and very early stage setting for a Cast Stone sample cured 10 days. Additional testing at longer curing times is required to determine whether additional time is required to reduce 100 % of the Tc(VII) in Cast Stone or whether the Tc loading exceeded the ability of the waste form to reduce 100 % of the Tc(VII). Additional testing is required for samples cured for longer times. Depth discrete subsampling in a nitrogen glove box is also required to determine whether the 5 percent Tc extracted from the subsamples was the result of the sampling process which took place in air. Reduction capacity measurements (per the Angus-Glasser method) performed on depth discrete samples could not be correlated with the amount of chromium or technetium leached from the depth discrete subsamples or with the oxidation front inferred from soluble chromium and technetium (i.e., effective Cr and Tc oxidation fronts). Residual reduction capacity

Langton, C. A.; Almond, P. M.

2013-11-26T23:59:59.000Z

394

Visual Text Features for Image Matching Sam S. Tsai1  

E-Print Network [OSTI]

Visual Text Features for Image Matching Sam S. Tsai1 , Huizhong Chen1 , David Chen1 , Vasu features that are based on text in cameraphone images. A robust text detection algorithm locates individual the visual text features in a way that resembles image features. We calculate their location, scale

Girod, Bernd

395

An Eta-model output study of frontogenesis conditions favoring development of a troposphere-spanning front  

E-Print Network [OSTI]

the importance of a cooperative relationship between the frontogenesis terms noted above. Upstream of the 500 mb trough, the tilting process of differential vertical motion ants in a positive sense and results in the formation of an upper-tropospheric front...

Stewart, Jeffrey Paul

1999-01-01T23:59:59.000Z

396

Safety and Environment Considerations and Analysis Safety and environmental issues are being considered up front in the APEX project as  

E-Print Network [OSTI]

Safety and Environment Considerations and Analysis Safety and environmental issues are being considered up front in the APEX project as designs evolve so that the goal of safety and environmental attractiveness is realized. Designing safety into the concepts as was done in the ITER project [1] results

California at Los Angeles, University of

397

rencontre du non-lineaire 2009 101 Effets d'un forcage spatial sur la dynamique des fronts  

E-Print Network [OSTI]

. Haudin1 , R. G. El´ias2 , M. G. Clerc2 ,, U. Bortolozzo1 , & S. Residori1 1 Institut Non Lin´eaire de´eris´ee par une propagation du front visant `a diminuer la taille du domaine le moins stable ´energ

Gavilan, Marcel G. Clerc

398

ICPIG, July 15-20, 2007, Prague, Czech Republi Negative streamer fronts: comparison of particle and fluid models and  

E-Print Network [OSTI]

that propagates into non-ionized matter. Streamers are used in industrial applications such as ozone generation28th ICPIG, July 15-20, 2007, Prague, Czech Republi Negative streamer fronts: comparison be generated during early stages of the lighting event. Both questions require a fully kinetic description

Ebert, Ute

399

Temperature activated absorption during laser-induced damage: The evolution of laser-supported solid-state absorption fronts  

SciTech Connect (OSTI)

Previously we have shown that the size of laser induced damage sites in both KDP and SiO{sub 2} is largely governed by the duration of the laser pulse which creates them. Here we present a model based on experiment and simulation that accounts for this behavior. Specifically, we show that solid-state laser-supported absorption fronts are generated during a damage event and that these fronts propagate at constant velocities for laser intensities up to 4 GW/cm{sup 2}. It is the constant absorption front velocity that leads to the dependence of laser damage site size on pulse duration. We show that these absorption fronts are driven principally by the temperature-activated deep sub band-gap optical absorptivity, free electron transport, and thermal diffusion in defect-free silica for temperatures up to 15,000K and pressures < 15GPa. In addition to the practical application of selecting an optimal laser for pre-initiation of large aperture optics, this work serves as a platform for understanding general laser-matter interactions in dielectrics under a variety of conditions.

Carr, C W; Bude, J D; Shen, N; Demange, P

2010-10-26T23:59:59.000Z

400

Materials and Design 24 (2003) 6978 0261-3069/03/$ -see front matter 2002 Elsevier Science Ltd. All rights reserved.  

E-Print Network [OSTI]

operate near their limits of thermal cracking and melting erosion resistances during long-burst firing. Due to their high melting temperature (controls melting- erosion resistance), high hotMaterials and Design 24 (2003) 69­78 0261-3069/03/$ - see front matter 2002 Elsevier Science Ltd

Grujicic, Mica

Note: This page contains sample records for the topic "features front wheel" 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

PHYSICAL REVIEW E 84, 036104 (2011) Average crack-front velocity during subcritical fracture propagation in a heterogeneous medium  

E-Print Network [OSTI]

PHYSICAL REVIEW E 84, 036104 (2011) Average crack-front velocity during subcritical fracture]. In consequence the slow kinetic crack propagation is usually referred to as subcritical crack growth or the subcritical regime. Statistical physics models suggest that this subcritical regime is governed by a thermally

Schmittbuhl, Jean

402

Effects of Ambient Velocity Shear on Nonlinear Internal Waves and Associated Mixing at the Columbia River Plume Front  

E-Print Network [OSTI]

distinct water masses: (a) source water at the lift-off point, and (b) the tidal, (c) re-circulating, and (d) far-field plumes [Horner-Devine et al, 2008]. The tidal plume is the water from the most recent front transitions from supercritical to subcritical conditions [Nash and Moum, 2005; Jay et al., 2008

Hickey, Barbara

403

January/February 2000 2000, Elsevier Science Inc., 1040-6190/00/$see front matter PII S1040-6190(99)00102-5 25 Health Effects of  

E-Print Network [OSTI]

January/February 2000 © 2000, Elsevier Science Inc., 1040-6190/00/$­see front matter PII S1040-6190/00/$­see front matter PII S1040-6190(99)00102-5 The Electricity Journal Paul Brodeur in The New Yorker

Illinois at Chicago, University of

404

October 2000 2000, Elsevier Science Inc., 1040-6190/00/$see front matter PII S1040-6190(00)00146-9 38 Flow-Based Transmission  

E-Print Network [OSTI]

October 2000 © 2000, Elsevier Science Inc., 1040-6190/00/$­see front matter PII S1040 Inc., 1040-6190/00/$­see front matter PII S1040-6190(00)00146-9 39 tralized spot or real-time market

Oren, Shmuel S.

405

Journal of Statistical Physics, Vol. 90, Nos. 5/6, 1998 We study the nucleation and growth of flame fronts in slow combustion. This  

E-Print Network [OSTI]

fronts in slow combustion. This is modeled by a set of reaction-diffusion equations for the temperature: Nucleation; reaction-diffusion systems; flame fronts. Nucleation, Growth, and Scaling in Slow Combustion applied to understand some aspects of slow combustion. We use a phase-field model of two coupled reaction

Grant, Martin

406

Partial Solar Eclipse Watch Party More than 100 people joined us on Thursday, October 23 to watch as the Moon slipped in front of the Sun during  

E-Print Network [OSTI]

as the Moon slipped in front of the Sun during a partial solar eclipse. We had telescopes and cameras set up to safely view the Sun. Solar glasses were available for purchase in the ticket booth. News stations from that the total gravity force on Earth is increased during a total eclipse, when the Moon goes in front of the Sun

Huang, Haiying

407

ENGINEERED BARRIER SYSTEM FEATURES, EVENTS AND PROCESSES  

SciTech Connect (OSTI)

The purpose of this report is to evaluate and document the inclusion or exclusion of engineered barrier system (EBS) features, events, and processes (FEPs) with respect to models and analyses used to support the total system performance assessment for the license application (TSPA-LA). A screening decision, either Included or Excluded, is given for each FEP along with the technical basis for exclusion screening decisions. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.114 (d, e, and f) [DIRS 173273]. The FEPs addressed in this report deal with those features, events, and processes relevant to the EBS focusing mainly on those components and conditions exterior to the waste package and within the rock mass surrounding emplacement drifts. The components of the EBS are the drip shield, waste package, waste form, cladding, emplacement pallet, emplacement drift excavated opening (also referred to as drift opening in this report), and invert. FEPs specific to the waste package, cladding, and drip shield are addressed in separate FEP reports: for example, ''Screening of Features, Events, and Processes in Drip Shield and Waste Package Degradation'' (BSC 2005 [DIRS 174995]), ''Clad Degradation--FEPs Screening Arguments (BSC 2004 [DIRS 170019]), and Waste-Form Features, Events, and Processes'' (BSC 2004 [DIRS 170020]). For included FEPs, this report summarizes the implementation of the FEP in the TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded). This report also documents changes to the EBS FEPs list that have occurred since the previous versions of this report. These changes have resulted due to a reevaluation of the FEPs for TSPA-LA as identified in Section 1.2 of this report and described in more detail in Section 6.1.1. This revision addresses updates in Yucca Mountain Project (YMP) administrative procedures as they pertain to this report; the current procedures are addressed in Section 2. This revision also addresses updates to the technical basis in supporting analysis and model reports and corroborative documentation, as presented in Sections 4 and 6 of this report. Finally, Sections 4, 5, and 6 of this report provide additional information pertaining to the relevant FEPs-related Acceptance Criteria presented in ''Yucca Mountain Review Plan, Final Report'' (YMRP) (NRC 2003 [DIRS 163274], Sections 2.2.1.2.1.3 and 2.2.1.3.3.3).

Jaros, W.

2005-08-30T23:59:59.000Z

408

Quantum features of consciousness, computers and brain  

E-Print Network [OSTI]

Many people believe that mysterious phenomenon of consciousness may be connected with quantum features of our world. The present author proposed so-called Extended Everett's Concept (EEC) that allowed to explain consciousness and super-consciousness (intuitive knowledge). Brain, according to EEC, is an interface between consciousness and super-consciousness on the one part and body on the other part. Relations between all these components of the human cognitive system are analyzed in the framework of EEC. It is concluded that technical devices improving usage of super-consciousness (intuition) may exist.

Michael B. Mensky

2009-10-22T23:59:59.000Z

409

ARM - Feature Stories and Releases Article  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformation InExplosionAnnouncements Media ContactCenterFeature Stories and

410

ARM - Feature Stories and Releases Article  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcal Documentation(AVIRIS) ProductsAirborneOctober 11, 2011 [Facility News] Final RecoveryNovemberJanuaryFeature

411

ARM - Feature Stories and Releases Article  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcal Documentation(AVIRIS) ProductsAirborneOctober 11, 2011 [Facility News] FinalSeptember 28,8, 2011 [Feature

412

ARM - Feature Stories and Releases Article  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcal Documentation(AVIRIS) ProductsAirborneOctober 11, 2011 [Facility News]January 18, 2006 [Feature Stories and

413

ARM - Feature Stories and Releases Article  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcal Documentation(AVIRIS) ProductsAirborneOctober 11, 2011 [Facility News]January 18, 2006 [Feature Stories

414

ARM - Feature Stories and Releases Article  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcal Documentation(AVIRIS) ProductsAirborneOctober 11, 2011 [Facility News]January 18, 2006 [Feature Stories7,

415

ARM - Feature Stories and Releases Article  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcal Documentation(AVIRIS) ProductsAirborneOctober 11, 2011 [Facility News]January 18, 2006 [Feature Stories7,4,

416

ARM - Feature Stories and Releases Article  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcal Documentation(AVIRIS) ProductsAirborneOctober 11, 2011 [Facility News]January 18, 2006 [Feature

417

ARM - Feature Stories and Releases Article  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcal Documentation(AVIRIS) ProductsAirborneOctober 11, 2011 [Facility News]January 18, 2006 [FeatureAugust 27,

418

ARM - Feature Stories and Releases Article  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcal Documentation(AVIRIS) ProductsAirborneOctober 11, 2011 [Facility News]January 18, 2006 [FeatureAugust 27,May

419

ARM - Feature Stories and Releases Article  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcal Documentation(AVIRIS) ProductsAirborneOctober 11, 2011 [Facility News]January 18, 2006 [FeatureAugust

420

ARM - Feature Stories and Releases Article  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcal Documentation(AVIRIS) ProductsAirborneOctober 11, 2011 [Facility News]January 18, 2006 [FeatureAugustJanuary

Note: This page contains sample records for the topic "features front wheel" 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.


421

Featured Licensing Professional - Energy Innovation Portal  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4:Epitaxial ThinFORFALL NEWS ROCKY MOUNTAINFastFeature Stories News

422

Featured Technical Reports | netl.doe.gov  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4:Epitaxial ThinFORFALL NEWS ROCKY MOUNTAINFastFeature Stories

423

Category:Topographic Features | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: EnergyBostonFacilityCascadeJumpInformationcontainingTerritories ofFeatures

424

Satellite stories featured in Lab lecture series  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted for USMaterialstheterahertz sourcesSatellite stories featured

425

Redeeming features of in situ combustion  

SciTech Connect (OSTI)

In situ combustion remains the most tantalizing enhanced oil recovery method. It has been tested extensively - in over 150 field tests - in both heavy and light oil reservoirs. What we have learned from this experience is that in situ combustion works under most conditions, but the nature of the problems is such that it is seldom profitable. Also, looking at many previous in situ combustion tests, steam injection, and even waterflooding, would have been a better choice. Yet in situ combustion has unique features not found in any other EOR method. These must be weighed against its shortcomings to evaluate a potential application. This paper discusses the redeeming features of in situ combustion, in particular the reservoir conditions under which in situ combustion may be superior to other EOR methods are outlined. All variations of in situ combustion - forward, reverse, wet, dry - as well as combinations with other EOR methods are considered. The conclusions is that in situ combustion still has a place, and its future application would depend on research on certain crucial aspects of the process.

Farouq Ali, S.M. [Univ. of Alberta, Edmonton (Canada)

1995-02-01T23:59:59.000Z

426

Kinematics and thermodynamics across a propagating non-stoichiometric oxidation phase front in spent fuel grains  

SciTech Connect (OSTI)

Spent fuel contains mixtures, alloy and compound, but are dominated by U and O except for some UO{sub 2} fuels with burnable poisons (gadolinia in BWR rods), the other elements evolve during reactor operation from neutron reaction and fission + fission decay events. Due to decay, chemical composition and activity of spent fuel will continue to evolve after removal from reactors. During the time interval with significant radioactivity levels relevant for a geological repository, it is important to develop models for potential chemical responses in spent fuel and potential degradation of repository. One such potential impact is the oxidation of spent fuel, which results in initial phase change of UO{sub 2} lattice to U{sub 4}O{sub 9} and the next phase change is probably to U{sub 3}O{sub 8} although it has not been observed yet below 200C. The U{sub 4}O{sub 9} lattice is nonstoichiometric with a O/U weight ratio at 2.4. Preliminary indications are that the UO{sub 2} has a O/U of 2. 4 at the time just before it transforms into the U{sub 4}O{sub 9} phase. In the oxygen weight gain versus time response, a plateau appears as the O/U approaches 2.4. Part of this plateau is due to geometrical effects of a U{sub 4}O{sub 9} phase change front propagating into UO{sub 2} grain volumes; however, this may indicate a metastable phase change delay kinetics or a diffusional related delay time until the oxygen density can satisfy stoichiometry and energy conditions for phase changes. Experimental data show a front of U{sub 4}O{sub 9} lattice structure propagating into grains of the UO{sub 2} lattice. To describe this spatially inhomogenous oxidation phase transition, as well as the expected U{sub 3}O{sub 8} phase transition from the U{sub 4}O{sub 9} lattice, lattice models are developed and spatially discontinuous kinematic and energetic expressions are derived. 9 refs.

Stout, R.B.; Kansa, E.J.; Wijesinghe, A.M.

1993-09-01T23:59:59.000Z

427

Features, Events, and Processes: Disruptive Events  

SciTech Connect (OSTI)

The primary purpose of this analysis is to evaluate seismic- and igneous-related features, events, and processes (FEPs). These FEPs represent areas of natural system processes that have the potential to produce disruptive events (DE) that could impact repository performance and are related to the geologic processes of tectonism, structural deformation, seismicity, and igneous activity. Collectively, they are referred to as the DE FEPs. This evaluation determines which of the DE FEPs are excluded from modeling used to support the total system performance assessment for license application (TSPA-LA). The evaluation is based on the data and results presented in supporting analysis reports, model reports, technical information, or corroborative documents that are cited in the individual FEP discussions in Section 6.2 of this analysis report.

J. King

2004-03-31T23:59:59.000Z

428

Component with inspection-facilitating features  

DOE Patents [OSTI]

A turbine airfoil can be formed with features to facilitate measurement of its wall thickness. An outer wall of the airfoil can include an outer surface and an inner surface. The outer surface of the airfoil can have an outer inspection target surface, and the inner surface of the airfoil can have an inner inspection target surface. The inner and outer target surfaces can define substantially flat regions in surfaces that are otherwise highly contoured. The inner and outer inspection target surfaces can be substantially aligned with each other. The inner and outer target surfaces can be substantially parallel to each other. As a result of these arrangements, a highly accurate measurement of wall thickness can be obtained. In one embodiment, the outer inspection target surface can be defined by an innermost surface of a groove formed in the outer surface of the outer wall of the airfoil.

Marra, John J; Zombo, Paul J

2014-02-11T23:59:59.000Z

429

Multiplicity features of adiabatic autothermal reactors  

SciTech Connect (OSTI)

In this paper singularity theory, large activation energy asymptotic, and numerical methods are used to present a comprehensive study of the steady-state multiplicity features of three classical adiabatic autothermal reactor models: tubular reactor with internal heat exchange, tubular reactor with external heat exchange, and the CSTR with external heat exchange. Specifically, the authors derive the exact uniqueness-multiplicity boundary, determine typical cross-sections of the bifurcation set, and classify the different types of bifurcation diagrams of conversion vs. residence time. Asymptotic (limiting) models are used to determine analytical expressions for the uniqueness boundary and the ignition and extinction points. The analytical results are used to present simple, explicit and accurate expressions defining the boundary of the region of autothermal operation in the physical parameter space.

Lovo, M.; Balakotaiah, V. (Houston Univ., TX (United States). Dept. of Chemical Engineering)

1992-01-01T23:59:59.000Z

430

Innovative safety features of the modular HTGR  

SciTech Connect (OSTI)

The Modular High Temperature Gas-Cooled Reactor (MHTGR) is an advanced reactor concept under development through a cooperative program involving the US Government, the nuclear industry, and the utilities. Near-term development is focused on electricity generation. The top-level safety requirement is that the plant's operation not disturb the normal day-to-day activities of the public. Quantitatively, this requires that the design meet the US Environmental Protection Agency's Protective Action Guides at the site boundary and hence preclude the need for sheltering or evacuation of the public. To meet these stringent safety requirements and at the same time provide a cost competitive design requires the innovative use of the basic high temperature gas-cooled reactor features of ceramic fuel, helium coolant, and a graphite moderator. The specific fuel composition and core size and configuration have been selected to the use the natural characteristics of these materials to develop significantly higher margins of safety. In this document the innovative safety features of the MHTGR are reviewed by examining the safety response to events challenging the functions relied on to retain radionuclides within the coated fuel particles. A broad range of challenges to core heat removal are examined, including a loss of helium pressure of a simultaneous loss of forced cooling of the core. The challenges to control of heat generation consider not only the failure to insert the reactivity control systems but also the withdrawal of control rods. Finally, challenges to control of chemical attack of the ceramic-coated fuel are considered, including catastrophic failure of the steam generator, which allows water ingress, or failure of the pressure vessels, which allows air ingress. The plant's response to these extreme challenges is not dependent on operator action, and the events considered encompass conceivable operator errors.

Silady, F.A.; Simon, W.A.

1992-01-01T23:59:59.000Z

431

Innovative safety features of the modular HTGR  

SciTech Connect (OSTI)

The Modular High Temperature Gas-Cooled Reactor (MHTGR) is an advanced reactor concept under development through a cooperative program involving the US Government, the nuclear industry, and the utilities. Near-term development is focused on electricity generation. The top-level safety requirement is that the plant`s operation not disturb the normal day-to-day activities of the public. Quantitatively, this requires that the design meet the US Environmental Protection Agency`s Protective Action Guides at the site boundary and hence preclude the need for sheltering or evacuation of the public. To meet these stringent safety requirements and at the same time provide a cost competitive design requires the innovative use of the basic high temperature gas-cooled reactor features of ceramic fuel, helium coolant, and a graphite moderator. The specific fuel composition and core size and configuration have been selected to the use the natural characteristics of these materials to develop significantly higher margins of safety. In this document the innovative safety features of the MHTGR are reviewed by examining the safety response to events challenging the functions relied on to retain radionuclides within the coated fuel particles. A broad range of challenges to core heat removal are examined, including a loss of helium pressure of a simultaneous loss of forced cooling of the core. The challenges to control of heat generation consider not only the failure to insert the reactivity control systems but also the withdrawal of control rods. Finally, challenges to control of chemical attack of the ceramic-coated fuel are considered, including catastrophic failure of the steam generator, which allows water ingress, or failure of the pressure vessels, which allows air ingress. The plant`s response to these extreme challenges is not dependent on operator action, and the events considered encompass conceivable operator errors.

Silady, F.A.; Simon, W.A.

1992-01-01T23:59:59.000Z

432

AB-Net Method of Protection from Projectiles (city, military base, battle-front, etc.)  

E-Print Network [OSTI]

The author suggests a low cost special AB-Net from artificial fiber, which may protect cities and important objects from rockets, artillery and mortar shells, projectiles, bullets, and strategic weapons. The idea is as follows: The offered AB-Net joins an incoming projectile to a small braking parachute and this incoming projectile loses speed by air braking after a drag distance of 50 - 150 meters. A following interception net after the first may serve to collect the slowed projectiles and their fragments or bomblets so that they do not reach the aimpoint. The author offers the design of AB-Net, a developed theory of snagging with a small braking parachute by AB-Net; and sample computations. These nets may be used for defense of a town, city, military base, battle-front line, road (from terrorists), or any important objects or installations (for example nuclear electric station, government buildings, etc.). Computed projects are: Net to counter small rockets (for example, from Qassam), net to counter artillery projectile (caliber 76 mm), net to counter bullets (caliber 7.6 mm). The offered method is cheaper by thousands of times than protection of a city by current anti-rocket systems. Discussion and results are at the end of the article. Key words: Protection from missile and projectile weapons, mortar, rocket, AB-Net, Qassam defense, incoming defense, armor.

Alexander Bolonkin

2008-02-13T23:59:59.000Z

433

Electromagnetic energy conversion in downstream fronts from three dimensional kinetic reconnection  

SciTech Connect (OSTI)

The electromagnetic energy equation is analyzed term by term in a 3D simulation of kinetic reconnection previously reported by Vapirev et al. [J. Geophys. Res.: Space Phys. 118, 1435 (2013)]. The evolution presents the usual 2D-like topological structures caused by an initial perturbation independent of the third dimension. However, downstream of the reconnection site, where the jetting plasma encounters the yet unperturbed pre-existing plasma, a downstream front is formed and made unstable by the strong density gradient and the unfavorable local acceleration field. The energy exchange between plasma and fields is most intense at the instability, reaching several pW/m{sup 3}, alternating between load (energy going from fields to particles) and generator (energy going from particles to fields) regions. Energy exchange is instead purely that of a load at the reconnection site itself in a region focused around the x-line and elongated along the separatrix surfaces. Poynting fluxes are generated at all energy exchange regions and travel away from the reconnection site transporting an energy signal of the order of about S?10{sup ?3}W/m{sup 2}.

Lapenta, Giovanni [Departement Wiskunde, KU Leuven, Universiteit Leuven (Belgium)] [Departement Wiskunde, KU Leuven, Universiteit Leuven (Belgium); Goldman, Martin; Newman, David [University of Colorado, Colorado 80309 (United States)] [University of Colorado, Colorado 80309 (United States); Markidis, Stefano [High Performance Computing and Visualization (HPCViz) Department, KTH Royal Institute of Technology, Stockholm (Sweden)] [High Performance Computing and Visualization (HPCViz) Department, KTH Royal Institute of Technology, Stockholm (Sweden); Divin, Andrey [Swedish Institute of Space Physics, Uppsala (Sweden)] [Swedish Institute of Space Physics, Uppsala (Sweden)

2014-05-15T23:59:59.000Z

434

Nonperturbative QCD coupling and its {beta} function from light-front holography  

SciTech Connect (OSTI)

The light-front holographic mapping of classical gravity in anti-de Sitter space, modified by a positive-sign dilaton background, leads to a nonperturbative effective coupling {alpha}{sub s}{sup AdS}(Q{sup 2}). It agrees with hadron physics data extracted from different observables, such as the effective charge defined by the Bjorken sum rule, as well as with the predictions of models with built-in confinement and lattice simulations. It also displays a transition from perturbative to nonperturbative conformal regimes at a momentum scale {approx}1 GeV. The resulting {beta} function appears to capture the essential characteristics of the full {beta} function of QCD, thus giving further support to the application of the gauge/gravity duality to the confining dynamics of strongly coupled QCD. Commensurate scale relations relate observables to each other without scheme or scale ambiguity. In this paper we extrapolate these relations to the nonperturbative domain, thus extending the range of predictions based on {alpha}{sub s}{sup AdS}(Q{sup 2}).

Brodsky, Stanley J.; Teramond, Guy F. de; Deur, Alexandre [SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94309 (United States); CP3-Origins, University of Southern Denmark, Odense, 5230 M (Denmark); Universidad de Costa Rica, San Jose (Costa Rica); Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)

2010-05-01T23:59:59.000Z

435

CMS hadron calorimeter front-end upgrade for SLHC phase I  

SciTech Connect (OSTI)

We present an upgrade plan for the CMS HCAL detector. The HCAL upgrade is required for the increased luminosity (3 * 10E34) of SLHC Phase I which is targeted for 2014. A key aspect of the HCAL upgrade is to add longitudinal segmentation to improve background rejection, energy resolution, and electron isolation at the L1 trigger. The increased segmentation is achieved by replacing the hybrid photodiodes (HPDs) with silicon PMTs (SIPMs). We plan to instrument each fiber of the calorimeter with an SIPM (103,000 total). We will then electrically sum outputs from selected SIPMs to form the longitudinal readout segments. In addition to having more longitudinal information, the upgrade plans include a new custom ADC with matched sensitivity and timing information. The increased data volume requires higher speed transmitters and the additional power dissipation for the readout electronics requires better thermal design, since much of the on-detector infrastructure (front-end electronics crates, cooling pipes, optical fiber plant, etc.) will remain the same. We will report on the preliminary designs for these upgraded systems, along with performance requirements and initial design studies.

Whitmore, Juliana; /Fermilab

2009-09-01T23:59:59.000Z

436

Magnetic field effects on the thermonuclear combustion front of Chandrasekhar mass white dwarfs  

E-Print Network [OSTI]

The explosion of a type Ia supernova starts in a white dwarf as a laminar deflagration at the center of the star and soon several hydrodynamic instabilities, in particular, the Rayleigh-Taylor instability, begin to act. A cellular stationary combustion and a turbulent combustion regime are rapidly achieved by the flame and maintained up to the end of the so-called flamelet regime when the transition to detonation is believed to occur. The burning velocity at these regimes is well described by the fractal model of combustion. Using a semi-analytic approach, we describe the effect of magnetic fields on the fractalization of the front considering a white dwarf with a nearly dipolar magnetic field. We find an intrinsic asymmetry on the velocity field that may be maintained up to the free expansion phase of the remnant. Considering the strongest values inferred for a white dwarf's magnetic fields with strengths up to $10^{8}-10^{9}$ G at the surface and assuming that the field near the centre is roughly 10 times greater, asymmetries in the velocity field higher than $10-20 %$ are produced between the magnetic polar and the equatorial axis of the remnant which may be related to the asymmetries found from recent spectropolarimetric observations of very young SN Ia remnants. Dependence of the asymmetry with white dwarf composition is also analyzed.

Cristian R. Ghezzi; Elisabete M. de Gouveia Dal Pino; Jorge E. Horvath

2000-12-06T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

Classification and Feature Extraction in Man and Machine  

E-Print Network [OSTI]

Classification and Feature Extraction in Man and Machine Dissertation zur Erlangung des Grades stimuli and for their subsequent classification. A methodology combining human psychophysics and machine learning is introduced, where feature extractors are modeled using methods from unsupervised machine

442

A hybrid ANN/DBN approach to articulatory feature recognition  

E-Print Network [OSTI]

Artificial neural networks (ANN) have proven to be well suited to the task of articulatory feature (AF) recognition. Previous studies have taken a cascaded approach where separate ANNs are trained for each feature group, making the assumption...

Frankel, Joe; King, Simon

2005-01-01T23:59:59.000Z

443

New Features of the Edison XC30 - Differences from Hopper  

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

New Features of the Edison XC30 New Features of the Edison XC30 While the Edison and Hopper systems have similar programming environments and software, there are some key...

444

37th World Energy Engineering Congress / Featuring GreenStreet...  

Broader source: Energy.gov (indexed) [DOE]

Congress Featuring GreenStreet 37th World Energy Engineering Congress Featuring GreenStreet October 1, 2014 2:00PM EDT to October 2, 2014 10:00PM EDT Washington, DC http:...

445

Feature-based design of solids with local composition control  

E-Print Network [OSTI]

This thesis presents a parametric and feature-based methodology for the design of solids with local composition control (LCC). A suite of composition design features are conceptualized and implemented. The designer can use ...

Liu, Hongye, 1970-

2004-01-01T23:59:59.000Z

446

Feb. 9 Event at Jefferson Lab Features Chemistry Demonstrations...  

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

Feb. 9 Event at Jefferson Lab Features Chemistry Demonstrations Set to Pop Music NEWPORT NEWS, Va., Feb. 2, 2010 - Jefferson Lab's Feb. 9 Science Series event will feature members...

447

ARPA-E Announces 2012 Energy Innovation Summit Featuring Bill...  

Broader source: Energy.gov (indexed) [DOE]

2012 Energy Innovation Summit Featuring Bill Gates, Fred Smith and Lee Scott ARPA-E Announces 2012 Energy Innovation Summit Featuring Bill Gates, Fred Smith and Lee Scott September...

448

Advertiser retains sole responsibility for content ADVERTISEMENT FEATURE  

E-Print Network [OSTI]

Advertiser retains sole responsibility for content ADVERTISEMENT FEATURE T okyo University to combat global food shortages, monitoring air pollution in East Asia and safeguarding the world's energy abilitiesinyoungresearchers." #12;Advertiser retains sole responsibility for content ADVERTISEMENT FEATURE and then use

Cai, Long

449

Contributed article Neuro-fuzzy feature evaluation with theoretical analysis  

E-Print Network [OSTI]

Science Ltd. All rights reserved. Keywords: Fuzzy sets; Neural networks; Pattern recognition; Feature a fuzzy set theoretic feature evaluation index and a connectionist model for its evaluation alongContributed article Neuro-fuzzy feature evaluation with theoretical analysis R.K. De, J. Basak, S

De, Rajat Kumar

450

Satellite observations and numerical simulations of jet-front gravity waves over North America and North Atlantic Ocean  

E-Print Network [OSTI]

SATELLITE OBSERVATIONS AND NUMERICAL SIMULATIONS OF JET-FRONT GRAVITY WAVES OVER NORTH AMERICA AND NORTH ATLANTIC OCEAN A Thesis by MENG ZHANG Submitted to the Office of Graduate Studies of Texas A&M University in partial... OCEAN A Thesis by MENG ZHANG 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 Approved by: Chair of Committee, Fuqing Zhang Committee...

Zhang, Meng

2008-10-10T23:59:59.000Z

451

The Electromagnetic Gauge Field Interpolation between the Instant Form and the Front Form of the Hamiltonian Dynamics  

E-Print Network [OSTI]

We present the electromagnetic gauge field interpolation between the instant form and the front form of the relativistic Hamiltonian dynamics and extend our interpolation of the scattering amplitude presented in the simple scalar field theory to the case of the electromagnetic gauge field theory with the scalar fermion fields known as the sQED theory. We find that the Coulomb gauge in the instant form dynamics (IFD) and the light-front gauge in the front form dynamics, or the light-front dynamics (LFD), are naturally linked by the unified general physical gauge that interpolates between these two forms of dynamics and derive the spin-1 polarization vector for the photon that can be generally applicable for any interpolation angle. Corresponding photon propagator for an arbitrary interpolation angle is found and examined in terms of the gauge field polarization and the interpolating time ordering. Using these results, we calculate the lowest-order scattering processes for an arbitrary interpolation angle in sQED. We provide an example of breaking the reflection symmetry under the longitudinal boost, $P^z \\leftrightarrow -P^z$, for the time-ordered scattering amplitude in any interpolating dynamics except the LFD and clarify the confusion in the prevailing notion of the equivalence between the infinite momentum frame (IMF) and the LFD. The particular correlation found in our previous analysis of the scattering amplitude in the simple scalar field theory, coined as the J-shaped correlation, between the total momentum of the system and the interpolation angle persists in the present analysis of the sQED scattering amplitude. We discuss the singular behavior of this correlation in conjunction with the zero-mode issue in the LFD.

Chueng-Ryong Ji; Ziyue Li; Alfredo Takashi Suzuki

2014-12-08T23:59:59.000Z

452

Paper No. 150. Ray, Najm and McCoy 1 Ignition front structure in a methane-air jet.1  

E-Print Network [OSTI]

Paper No. 150. Ray, Najm and McCoy 1 Ignition front structure in a methane-air jet.1 J.Ray2 , H. N-premixed methane jet in coflow air using the GRImech1.2 chemical mechanism. Ignition is initiated in the jet mixing flame, as compared to a stoichiometric premixed flame. In this study we ignite a methane-air jet

Ray, Jaideep

453

Redesign and Reconstruction of the Equipment Protection Systems for the Upgrading Front Ends and Beamlines at BSRF  

SciTech Connect (OSTI)

The BEPC(Beijing Electron-Positron Collider) is upgraded to be BEPCII, a two-ring Electron-Positron collider. Due to the construction of the BEPCII and upgrade of the existing front ends and beamlines, all the existing EPSs(Equipment Protection Systems) have to be redesigned and reconstructed at BSRF. All the redesigned EPSs for the upgrading front ends and beamlines are a PLC- and SCADA-based equipment protection and control and monitoring system. The EPSs are used to protect BEPCII two storage rings vacuum against vacuum failures in a beamline, as well as to protect the front-end and beamline components from being damaged by synchrotron radiation. For the high-power wiggler beam lines, a fast movable mask is used to protect the blade of a fast-closing valve from damage when the fast-closing valve is triggered to close, which does not need to dump the electron beam running in BEPCII outer ring. In addition, all redesigned PLC- based EPSs are used to communicate with the same centralized monitoring computer to monitor a variety of parameters from all PLC- based EPS systems. The monitoring computer runs the SCADA (Supervisory Control And Data Acquisition) software with its own web server. Graphical HMI interfaces are used to display a few overall views of all front-end equipment operation status and the further detailed information for each EPS in a different pop-up window. On the web services, the SCADA-based centralized monitoring system provides a web browse function, etc. The design of the reconstructed systems is described in this paper.

Xiong Shenshou; Tan Yinglei; Wu Xuehui [Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, P. O. Box 918, Branch 2-7, Beijing 100049 (China)

2007-01-19T23:59:59.000Z

454

Microstructural Features in Aged Erbium Tritide Foils  

SciTech Connect (OSTI)

Aged erbium tritide foil specimens are found to contain five distinctly different microstructural features. The general structure was of large columnar grains of ErT2. But on a fine scale, precipitates believed to be erbium oxy-tritides and helium bubbles could be identified. The precipitate size was in the range of ~10 nm and the bubbles were of an unusual planar shape on {111} planes with an invariant thickness of ~1 nm and a diameter on the order of 10 nm. Also, an outer layer containing no fine precipitate structure and only a few helium bubbles was present on foils. This layer is best described as a denuded zone which probably grew during aging in air. Finally, large embedded Er2O3 particles were found at low density and non-uniformly distributed, but sometimes extending through the thickness of the foil. A failure mechanism allowing the helium to escape is suggested by observed cracking between bubbles closer to end of life.

Gelles, David S.; Brewer, L. N.; Kotula, Paul G.; Cowgill, Donald F.; Busick, C. C.; Snow, C. S.

2008-01-01T23:59:59.000Z

455

Features, Events, and Processes: Disruptive Events  

SciTech Connect (OSTI)

The purpose of this analysis report is to evaluate and document the inclusion or exclusion of the disruptive events features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment for license application (TSPA-LA). A screening decision, either ''Included'' or ''Excluded,'' is given for each FEP, along with the technical basis for screening decisions. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.114 (d), (e), and (f) [DIRS 156605]. The FEPs addressed in this report deal with both seismic and igneous disruptive events, such as fault displacements through the repository and an igneous intrusion into the repository. For included FEPs, this analysis summarizes the implementation of the FEP in TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded). Previous versions of this report were developed to support the total system performance assessments (TSPA) for various prior repository designs. This revision addresses the repository design for the license application (LA).

P. Sanchez

2004-11-08T23:59:59.000Z

456

Features, Events, and Processes: system Level  

SciTech Connect (OSTI)

The purpose of this analysis report is to evaluate and document the inclusion or exclusion of the system-level features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment for the license application (TSPA-LA). A screening decision, either Included or Excluded, is given for each FEP along with the technical basis for screening decisions. This information is required by the U.S. Nuclear Regulatory Commission (NRC) at 10 CFR 63.113 (d, e, and f) (DIRS 156605). The system-level FEPs addressed in this report typically are overarching in nature, rather than being focused on a particular process or subsystem. As a result, they are best dealt with at the system level rather than addressed within supporting process-level or subsystem-level analyses and models reports. The system-level FEPs also tend to be directly addressed by regulations, guidance documents, or assumptions listed in the regulations; or are addressed in background information used in development of the regulations. For included FEPs, this analysis summarizes the implementation of the FEP in the TSPA-LA (i.e., how the FEP is included). For excluded FEPs, this analysis provides the technical basis for exclusion from the TSPA-LA (i.e., why the FEP is excluded). The initial version of this report (Revision 00) was developed to support the total system performance assessment for site recommendation (TSPA-SR). This revision addresses the license application (LA) FEP List (DIRS 170760).

D. McGregor

2004-10-15T23:59:59.000Z

457

Discrete Symmetries on the Light Front and a General Relation Connecting Nucleon Electric Dipole and Anomalous Magnetic Moments  

E-Print Network [OSTI]

We consider the electric dipole form factor, F_3(q^2), as well as the Dirac and Pauli form factors, F_1(q^2) and F_2(q^2), of the nucleon in the light-front formalism. We derive an exact formula for F_3(q^2) to complement those known for F_1(q^2) and F_2(q^2). We derive the light-front representation of the discrete symmetry transformations and show that time-reversal- and parity-odd effects are captured by phases in the light-front wave functions. We thus determine that the contributions to F_2(q^2) and F_3(q^2), Fock state by Fock state, are related, independent of the fundamental mechanism through which CP violation is generated. Our relation is not specific to the nucleon, but, rather, is true of spin-1/2 systems in general, be they lepton or baryon. The empirical values of the anomalous magnetic moments, in concert with empirical bounds on the associated electric dipole moments, can better constrain theories of CP violation. In particular, we find that the neutron and proton electric dipole moments echo the isospin structure of the anomalous magnetic moments, kappa^n ~ - kappa^p.

S. J. Brodsky; S. Gardner; D. S. Hwang

2006-02-27T23:59:59.000Z

458

NASA Home > News & Features > News Topics > Solar System > Features Send Print Share > Log In To MyNASA | > Sign Up  

E-Print Network [OSTI]

overhead to provide a birds-eye view of mountain ranges, lakes and canyons. On the ground, a rover or lakeNASA Home > News & Features > News Topics > Solar System > Features Send Print Share > Log In To MyNASA | > Sign Up News & Features News Topics Shuttle & Station Moon & Mars Solar System Sun-Earth System

Arizona, University of

459

Mechanical Design and Modeling of an Omni-directional RoboCup Player Brian Carter1  

E-Print Network [OSTI]

graduate student, this was a simple two wheeled robot with skids on the front and a roller ball on the back is derived in a symbolic form, assuming that no slip occurs on the wheel in the spin direction. Finally, a simulation example demonstrates simple independent PID wheel control for the complex coupled nonlinear

Williams II, Robert L.

460

Implications of Canada, snow, and white-fronted geese and Northern bobwhite as disease reservoirs for the Attwater's prairie-chicken  

E-Print Network [OSTI]

, 10 Canada (Branta canadensis), 24 snow (Chen caerulescens), and 22 white-fronted geese (Anser albifrons) were examined for endoparasites. Northern bobwhite (Colinus virginianus) (n = 62), the closest relative of Attwater's prairie...

Purvis, Jonny Ray

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

Surface and Coatings Technology 169170 (2003) 379383 0257-8972/03/$ -see front matter 2003 Elsevier Science B.V. All rights reserved.  

E-Print Network [OSTI]

Surface and Coatings Technology 169­170 (2003) 379­383 0257-8972/03/$ - see front matter 2003­650 km) is rich in atomic oxygen. This highly reactive element impacts satellites at relative velocities

462

Michael Gutmann University of Helsinki ICANN2009: Learning Features by Contrasting Natural Images with Noise -p. 1/17 Learning Features by Contrasting Natural  

E-Print Network [OSTI]

Contrastive feature learning Simulations Michael Gutmann University of Helsinki ICANN2009: Learning Features. image vs. noise q Classifier Contrastive feature learning Simulations Michael Gutmann University;Introduction q Preliminaries q Nat. image vs. noise q Classifier Contrastive feature learning Simulations

Gutmann, Michael

463

ENGINEERED BARRIER SYSTEM FEATURES, EVENTS, AND PROCESSES  

SciTech Connect (OSTI)

This analysis report is one of the technical reports containing documentation of the Environmental Radiation Model for Yucca Mountain, Nevada (ERMYN), a biosphere model supporting the total system performance assessment (TSPA) for the license application (LA) for the Yucca Mountain repository. This analysis report describes the development of biosphere dose conversion factors (BDCFs) for the volcanic ash exposure scenario, and the development of dose factors for calculating inhalation dose during volcanic eruption. A graphical representation of the documentation hierarchy for the ERMYN is presented in Figure 1 - 1. This figure shows the interrelationships among the products (i.e., analysis and model reports) developed for biosphere modeling and provides an understanding of how this analysis report contributes to biosphere modeling. This report is one of two reports that develop biosphere BDCFs, which are input parameters for the TSPA model. The ''Biosphere Model Report'' (BSC 2004 [DIRS 169460]) describes in detail the ERMYN conceptual model and mathematical model. The input parameter reports, shown to the right of the Biosphere Model Report in Figure 1-1, contain detailed descriptions of the model input parameters, their development and the relationship between the parameters and specific features, events and processes (FEPs). This report describes biosphere model calculations and their output, the BDCFs, for the volcanic ash exposure scenario. This analysis receives direct input from the outputs of the ''Biosphere Model Report'' (BSC 2004 [DIRS 169460]) and from the five analyses that develop parameter values for the biosphere model (BSC 2005 [DIRS 172827]; BSC 2004 [DIRS 169672]; BSC 2004 [DIRS 169673]; BSC 2004 [DIRS 169458]; and BSC 2004 [DIRS 169459]). The results of this report are further analyzed in the ''Biosphere Dose Conversion Factor Importance and Sensitivity Analysis'' (Figure 1 - 1). The objective of this analysis was to develop the BDCFs for the volcanic ash exposure scenario and the dose factors for calculating inhalation doses during volcanic eruption (eruption phase of the volcanic event). For the volcanic ash exposure scenario, the mode of radionuclide release into the biosphere is a volcanic eruption through the repository with the resulting entrainment of contaminated waste in the tephra and the subsequent atmospheric transport and dispersion of contaminated material in the biosphere. The biosphere process model for this scenario uses the surface deposition of contaminated ash as the source of radionuclides in the biosphere. The initial atmospheric transport and dispersion of the ash as well as its subsequent redistribution by fluvial and aeolian processes are not addressed within the biosphere model. These processes influence the value of the source term that is calculated elsewhere and then combined with the BDCFs in the TSPA model to calculate expected dose to the receptor.

na

2005-05-30T23:59:59.000Z

464

Social Thought and Research, Volume 23, Number 1&2 (2000): Front Matter  

E-Print Network [OSTI]

to the above address. TABLE OF CONTENTS Vol. 23, No. 1&2 2000 ACKNOWLEDGMENTS FEATURE ARTICLE ON AMERICAN SOCIAL THOUGHT Robert J. Kent Dewey and the Project of Critical Social Theory ~ 1 Two EARLY AMERICAN MAsTERS: MEAD AND BLUMER George Herbert Mead Science... Vision in Sociology 199 Clifford L. Staples and William G. Staples Rereading Harry Braverman's LaborandMonopolY Capital After Twenty years 227 Jean Van Delinder Dance as Experience: Pragmatism and Classical Ballet 239 1 ~ I r I I ; J I . I ! SPECIAL...

2000-04-01T23:59:59.000Z

465

IMPROVING FISHERIES SCIENCE WITH ADVANCED SAMPLING TECHNOLOGIES FEATURE ARTICLE 2  

E-Print Network [OSTI]

of advanced sam- pling technologies for providing accurate, precise, and timely population estimates density) in red. Echogram images are vertically exag- gerated to highlight features and patterns

466

atypical mri features: Topics by E-print Network  

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

al. (2004) found that patients treated with typical antipsychotics exhibited 2 3-D MRI Brain Scan Feature Classification Using an Oct-tree Representation Computer Technologies and...

467

Fall Lectures Feature Life of Einstein; Exploring Our World With...  

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

Fall Lectures Feature Life of Einstein; Exploring Our World With Particle Accelerators NEWPORT NEWS, Va., Sept. 22, 2010 - Jefferson Lab's first 2010 Fall Science Series lecture,...

468

Feature Detection, Characterization and Confirmation Methodology: Final Report  

E-Print Network [OSTI]

and sources of salts in a granite batholith on the Canadianpetrological features of Toki Granite. STA Science Exchangefrom the rapakivi granite on the island of Hstholmen.

Karasaki, Kenzi

2009-01-01T23:59:59.000Z

469

Geothermal Heating and Cooling Systems Featured on NBC Nightly...  

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

American homes. View the video. Addthis Related Articles Geothermal Energy Featured on NBC's Today Show Building America Update - January 15, 2015 Heat Pump Water Heater Basics...

470

CHARACTERIZATION OF THE COHERENT NOISE, ELECTROMAGNETIC COMPATIBILITY AND ELECTROMAGNETIC INTERFERENCE OF THE ATLAS EM CALORIMETER FRONT END BOARD  

SciTech Connect (OSTI)

The ATLAS Electromagnetic (EM) calorimeter (EMCAL) Front End Board (FEB) will be located in custom-designed enclosures solidly connected to the feedtroughs. It is a complex mixed signal board which includes the preamplifier, shaper, switched capacitor array analog memory unit (SCA), analog to digital conversion, serialization of the data and related control logic. It will be described in detail elsewhere in these proceedings. The electromagnetic interference (either pick-up from the on board digital activity, from power supply ripple or from external sources) which affects coherently large groups of channels (coherent noise) is of particular concern in calorimetry and it has been studied in detail.

CHASE,B.CITTERIO,M.LANNI,F.MAKOWIECKI,D.RADEKA,S.RESCIA,S.TAKAI,H.ET AL.

1999-09-20T23:59:59.000Z

471

CHARACTERIZATION OF THE COHERENT NOISE, ELECTROMAGNETIC COMPATIBILITY AND ELECTROMAGNETIC INTERFERENCE OF THE ATLAS EM CALORIMETER FRONT END BOARD  

SciTech Connect (OSTI)

The ATLAS Electromagnetic (EM) calorimeter (EMCAL) Front End Board (FEB) will be located in custom-designed enclosures solidly connected to the feedtroughs. It is a complex mixed signal board which includes the preamplifier, shaper, switched capacitor array analog memory unit (SCA), analog to digital conversion, serialization of the data and related control logic. It will be described in detail elsewhere in these proceedings. The electromagnetic interference (either pick-up from the on board digital activity, from power supply ripple or from external sources) which affects coherently large groups of channels (coherent noise) is of particular concern in calorimetry and it has been studied in detail.

CHASE,R.L.; CITTERIO,M.; LANNI,F.; MAKOWIECKI,D.; RADEKA,V.; RESCIA,S.; TAKAI,H.; BAN,J.; PARSONS,J.; SIPPACH,W.

2000-09-20T23:59:59.000Z

472

Termination Semantics of Logic Programs with Cut and Related Features  

E-Print Network [OSTI]

Termination Semantics of Logic Programs with Cut and Related Features Jamie Andrews Dept of termination for logic programs. I am particularly interested in the termination of logic programs which use practical features such as the Prolog ``cut''. In order to prove termination of such programs

Giesl, Juergen

473

Feature selection in high dimensional regression problems for genomics  

E-Print Network [OSTI]

Feature selection in high dimensional regression problems for genomics Julie Hamon1,2,3 , Clarisse, France julien.jacques@lifl.fr Abstract. In the context of genomic selection in animal breeding and "closed to real" datasets. Keywords: Feature selection, combinatorial optimization, regression, genomic. 1

Paris-Sud XI, Université de

474

Middleware Support For Crosscutting Features in Distributed, Heterogeneous Systems  

E-Print Network [OSTI]

for such features are often locality-dependent and discovered late (e.g., security policies). The DADO3 approach helps program crosscutting features in standard CORBA based DH middleware software through an aspect-oriented approach. A DADO service comprises pairs of adaptlets which are explicitly modeled in IDL. Adaplets may

Devanbu, Prem

475

Credibility in Context: An Analysis of Feature Distributions in Twitter  

E-Print Network [OSTI]

to determine who the experts are [2], which party will win the election [3], [4] or who the influential people to make generalized conclusions about Twitter vs. the specific data set that they are derived from. When regression of individual features vs network aggregation algorithms. More importantly, different features may

Hollerer, Tobias

476

The Minimum Description Length Principle Applied to Feature Learning and  

E-Print Network [OSTI]

the or- thogonal clustering algorithm, called MDL/OC, is nding the features fperson, nationality, sex, generationg from the database of family rela- tions used by Geo rey Hinton 1986] to demonstrate feature Problem : : : : : : : : : : : : : : : : : : : : 26 3.10 Country Trading Problem

Derthick, Mark

477

Translating Orc Features into Petri nets and the Join Calculus #  

E-Print Network [OSTI]

Translating Orc Features into Petri nets and the Join Calculus # Roberto Bruni 1 , Hern@di.unipi.it, hernan.melgratti@imtlucca.it, et52@mcs.le.ac.uk Abstract. Cook and Misra's Orc is an elegant language the key novel features of Orc by comparing it with variations of Petri nets. The comparison shows that Orc

Bruni, Roberto

478

Translating Orc Features into Petri nets and the Join Calculus  

E-Print Network [OSTI]

Translating Orc Features into Petri nets and the Join Calculus Roberto Bruni1, Hern´an Melgratti2@di.unipi.it, hernan.melgratti@imtlucca.it, et52@mcs.le.ac.uk Abstract. Cook and Misra's Orc is an elegant language the key novel features of Orc by comparing it with variations of Petri nets. The comparison shows that Orc

Bruni, Roberto

479

Topics in Biomedical Optics: introduction to the feature issue  

E-Print Network [OSTI]

Topics in Biomedical Optics: introduction to the feature issue Joseph P. Culver,1, * Wolfgang; accepted 25 March 2009; posted 25 March 2009 (Doc. ID 109253); published 30 March 2009 This Applied Optics feature issue on Topics in Biomedical Optics highlights papers presented at the 2008 Biomedical Topical

Larson-Prior, Linda

480

Feature based volume decomposition for automatic hexahedral mesh generation  

SciTech Connect (OSTI)

Much progress has been made through these years to achieve automatic hexahedral mesh generation. While general meshing algorithms that can take on general geometry are not there yet; many well-proven automatic meshing algorithms now work on certain classes of geometry. This paper presents a feature based volume decomposition approach for automatic Hexahedral Mesh generation. In this approach, feature recognition techniques are introduced to determine decomposition features from a CAD model. The features are then decomposed and mapped with appropriate automatic meshing algorithms suitable for the correspondent geometry. Thus a formerly unmeshable CAD model may become meshable. The procedure of feature decomposition is recursive: sub-models are further decomposed until either they are matched with appropriate meshing algorithms or no more decomposition features are detected. The feature recognition methods employed are convexity based and use topology and geometry information, which is generally available in BREP solid models. The operations of volume decomposition are also detailed in the paper. The final section, the capability of the feature decomposer is demonstrated over some complicated manufactured parts.

LU,YONG; GADH,RAJIT; TAUTGES,TIMOTHY J.

2000-02-21T23:59:59.000Z

Note: This page contains sample records for the topic "features front wheel" 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

Feature Reinforcement Learning In Practice September 9, 2011  

E-Print Network [OSTI]

Feature Reinforcement Learning In Practice #12;Problems Robotic control in an unknown environment Feature #12;Problem formulation ht = a1o1r1o2r2a2 . . . otrt at = Agent(ht) ot+1rt+1 = Environment (Closed Finite State Machines) Markov trees are trees where given st and at, ot+1, we know st+1 Parallel

Hutter, Marcus

482

CRITICAL FEATURES IN HUMAN MOTION SIMULATION FOR ERGONOMIC ANALYSIS  

E-Print Network [OSTI]

CRITICAL FEATURES IN HUMAN MOTION SIMULATION FOR ERGONOMIC ANALYSIS Matthew P. Reed, Don B. Chaffin of choice for assessments of the physical ergonomics of products and workplaces. Software representations important for ergonomic analysis. This paper identifies and justifies a set of these critical features

Faraway, Julian

483

Effect of Front-Side Silver Metallization on Underlying n+-p Junction in Multicrystalline Silicon Solar Cells: Preprint  

SciTech Connect (OSTI)

We report on the effect of front-side Ag metallization on the underlying n+-p junction of multicrystalline Si solar cells. The junction quality beneath the contacts was investigated by characterizing the uniformities of the electrostatic potential and doping concentration across the junction, using scanning Kelvin probe force microscopy and scanning capacitance microscopy. We investigated cells with a commercial Ag paste (DuPont PV159) and fired at furnace setting temperatures of 800 degrees, 840 degrees, and 930 degrees C, which results in actual cell temperatures ~100 degrees C lower than the setting temperature and the three cells being under-, optimal-, and over-fired. We found that the uniformity of the junction beneath the Ag contact was significantly degraded by the over-firing, whereas the junction retained good uniformity with the optimal- and under-fire temperatures. Further, Ag crystallites with widely distributed sizes from <100 nm to several ?m were found at the Ag/Si interface of the over-fired cell. Large crystallites were imaged as protrusions into Si deeper than the junction depth. However, the junction was not broken down; instead, it was reformed on the entire front of the crystallite/Si interface. We propose a mechanism of the junction-quality degradation, based on emitter Si melting at the temperature around the Ag-Si eutectic point during firing, and subsequent recrystallization with incorporation of impurities in the Ag paste and with formation of crystallographic defects during quenching.

Jiang, C. S.; Li, Z. G.; Moutinho, H. R.; Liang, L.; Ionkin, A.; Al-Jassim, M. M.

2012-06-01T23:59:59.000Z

484

Unsupervised Feature Learning for High-Resolution Satellite Image Classification  

SciTech Connect (OSTI)

The rich data provided by high-resolution satellite imagery allow us to directly model geospatial neighborhoods by understanding their spatial and structural patterns. In this paper we explore an unsupervised feature learning approach to model geospatial neighborhoods for classification purposes. While pixel and object based classification approaches are widely used for satellite image analysis, often these approaches exploit the high-fidelity image data in a limited way. In this paper we extract low-level features to characterize the local neighborhood patterns. We exploit the unlabeled feature measurements in a novel way to learn a set of basis functions to derive new features. The derived sparse feature representation obtained by encoding the measured features in terms of the learned basis function set yields superior classification performance. We applied our technique on two challenging image datasets: ORNL dataset representing one-meter spatial resolution satellite imagery representing five land-use categories and, UCMERCED dataset consisting of 21 different categories representing sub-meter resolution overhead imagery. Our results are highly promising and, in the case of UCMERCED dataset we outperform the best results obtained for this dataset. We show that our feature extraction and learning methods are highly effective in developing a detection system that can be used to automatically scan large-scale high-resolution satellite imagery for detecting large-facility.

Cheriyadat, Anil M [ORNL

2013-01-01T23:59:59.000Z

487

Comparison among Hamiltonian light-front formalisms at q+ = 0 and q+ 0: space-like elastic form factors of pseudoscalar and vector mesons  

E-Print Network [OSTI]

The electromagnetic elastic form factors of pseudoscalar and vector mesons are analyzed for space-like momentum transfers in terms of relativistic quark models based on the Hamiltonian light-front formalism elaborated in different reference frames (q+ 0 and q+ 0). As far as the one-body approximation for the electromagnetic current operator is concerned, it is shown that the predictions of the light-front approach at q+=0 should be preferred, particularly in case of light hadrons, because of: i) the relevant role played by the Z-graph at q+ 0, and ii) the appropriate elimination of spurious effects, related to the orientation of the null hyperplane where the light-front wave function is defined.

Silvano Simula

2002-08-07T23:59:59.000Z

488

2/21/11 11:08 AMOregon Quarterly Features Page 1 of 4http://www.oregonquarterly.com/winter2010/feature4.php  

E-Print Network [OSTI]

/feature4.php UO Home | Dept index Winter 2010 | Volume 90, Number 2 Donate to OQ | Past Issues:08 AMOregon Quarterly Features Page 2 of 4http://www.oregonquarterly.com/winter2010/feature4.php monochrome

Richmond, Geraldine L.

489

Enhancing inductive learning with feature selection and example selection  

E-Print Network [OSTI]

independently and as a combined scheme. We propose a sequential search filter approach called Subset selection using Case-based Relevance APproach (SCRAP) for identifying and eliminating irrelevant features. The SCRAP filter addresses the problem of finding a...

Raman, Baranidharan

2003-01-01T23:59:59.000Z

490

PPPL's Earth Week features Colloquium on NYC green plan, cleanup...  

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

PPPL's Earth Week features Colloquium on NYC green plan, cleanup and awards By Jeanne Jackson DeVoe April 28, 2014 Tweet Widget Google Plus One Share on Facebook Volunteers clean...

491

GOOGLE EARTH QUICK GUIDE (1)Google Earth Features  

E-Print Network [OSTI]

GOOGLE EARTH QUICK GUIDE (1)Google Earth Features The Google Earth of the Google Earth window. Often when opening up the Google Earth program, the view screen will be a view of the entire Earth from space. Navigation bar

Smith-Konter, Bridget

492

Feature tracking for visual servoing purposes ric Marchand, Franois Chaumette  

E-Print Network [OSTI]

Feature tracking for visual servoing purposes ?ric Marchand, François Chaumette IRISA - INRIA experiments ordered by subjective increasing difficulties. Email addresses: marchand@irisa.fr (?ric Marchand

Paris-Sud XI, Université de

493

Intrinsic feature-based pose measurement for imaging motion compensation  

DOE Patents [OSTI]

Systems and methods for generating motion corrected tomographic images are provided. A method includes obtaining first images of a region of interest (ROI) to be imaged and associated with a first time, where the first images are associated with different positions and orientations with respect to the ROI. The method also includes defining an active region in the each of the first images and selecting intrinsic features in each of the first images based on the active region. Second, identifying a portion of the intrinsic features temporally and spatially matching intrinsic features in corresponding ones of second images of the ROI associated with a second time prior to the first time and computing three-dimensional (3D) coordinates for the portion of the intrinsic features. Finally, the method includes computing a relative pose for the first images based on the 3D coordinates.

Baba, Justin S.; Goddard, Jr., James Samuel

2014-08-19T23:59:59.000Z

494

Temporal Features for Broadcast News Segmentation Michael T. Johnson1  

E-Print Network [OSTI]

Temporal Features for Broadcast News Segmentation Michael T. Johnson1 and Leah H. Jamieson2 1 Department of Electrical and Computer Engineering, Marquette University, Milwaukee, WI mike.johnson

Johnson, Michael T.

495

Dynamics of low capillary number interfaces moving through sharp features  

E-Print Network [OSTI]

, New Mexico 87185 Roger T. Bonnecazea Department of Chemical Engineering and Texas Materials Institute of the feature filling suggest an effective boundary condition for a macroscopic lubrication model of the imprint

496

Discrete Feature Approach for Heterogeneous Reservoir Production Enhancement  

SciTech Connect (OSTI)

The report presents summaries of technology development for discrete feature modeling in support of the improved oil recovery (IOR) for heterogeneous reservoirs. In addition, the report describes the demonstration of these technologies at project study sites.

Dershowitz, William S.; Curran, Brendan; Einstein, Herbert; LaPointe, Paul; Shuttle, Dawn; Klise, Kate

2002-07-26T23:59:59.000Z

497

Learning Energy Demand Domain Knowledge via Feature Transformation  

E-Print Network [OSTI]

Learning Energy Demand Domain Knowledge via Feature Transformation Sanzad Siddique Department -- Domain knowledge is an essential factor for forecasting energy demand. This paper introduces a method knowledge substantially improves energy demand forecasting accuracy. However, domain knowledge may differ

Povinelli, Richard J.

498

Feature-Based Statistical Analysis of Combustion Simulation Data  

SciTech Connect (OSTI)

We present a new framework for feature-based statistical analysis of large-scale scientific data and demonstrate its effectiveness by analyzing features from Direct Numerical Simulations (DNS) of turbulent combustion. Turbulent flows are ubiquitous and account for transport and mixing processes in combustion, astrophysics, fusion, and climate modeling among other disciplines. They are also characterized by coherent structure or organized motion, i.e. nonlocal entities whose geometrical features can directly impact molecular mixing and reactive processes. While traditional multi-point statistics provide correlative information, they lack nonlocal structural information, and hence, fail to provide mechanistic causality information between organized fluid motion and mixing and reactive processes. Hence, it is of great interest to capture and track flow features and their statistics together with their correlation with relevant scalar quantities, e.g. temperature or species concentrations. In our approach we encode the set of all possible flow features by pre-computing merge trees augmented with attributes, such as statistical moments of various scalar fields, e.g. temperature, as well as length-scales computed via spectral analysis. The computation is performed in an efficient streaming manner in a pre-processing step and results in a collection of meta-data that is orders of magnitude smaller than the original simulation data. This meta-data is sufficient to support a fully flexible and interactive analysis of the features, allowing for arbitrary thresholds, providing per-feature statistics, and creating various global diagnostics such as Cumulative Density Functions (CDFs), histograms, or time-series. We combine the analysis with a rendering of the features in a linked-view browser that enables scientists to interactively explore, visualize, and analyze the equivalent of one terabyte of simulation data. We highlight the utility of this new framework for combustion science; however, it is applicable to many other science domains.

Bennett, J; Krishnamoorthy, V; Liu, S; Grout, R; Hawkes, E; Chen, J; Pascucci, V; Bremer, P T

2011-11-18T23:59:59.000Z

499

Multi-tube fuel nozzle with mixing features  

DOE Patents [OSTI]

A system includes a multi-tube fuel nozzle having an inlet plate and a plurality of tubes adjacent the inlet plate. The inlet plate includes a plurality of apertures, and each aperture includes an inlet feature. Each tube of the plurality of tubes is coupled to an aperture of the plurality of apertures. The multi-tube fuel nozzle includes a differential configuration of inlet features among the plurality of tubes.

Hughes, Michael John

2014-04-22T23:59:59.000Z

500

The effective field theory of inflation models with sharp features  

SciTech Connect (OSTI)

We describe models of single-field inflation with small and sharp step features in the potential (and sound speed) of the inflaton field, in the context of the Effective Field Theory of Inflation. This approach allows us to study the effects of features in the power-spectrum and in the bispectrum of curvature perturbations, from a model-independent point of view, by parametrizing the features directly with modified ''slow-roll'' parameters. We can obtain a self-consistent power-spectrum, together with enhanced non-Gaussianity, which grows with a quantity ? that parametrizes the sharpness of the step. With this treatment it is straightforward to generalize and include features in other coefficients of the effective action of the inflaton field fluctuations. Our conclusion in this case is that, excluding extrinsic curvature terms, the only interesting effects at the level of the bispectrum could arise from features in the first slow-roll parameter ? or in the speed of sound c{sub s}. Finally, we derive an upper bound on the parameter ? from the consistency of the perturbative expansion of the action for inflaton perturbations. This constraint can be used for an estimation of the signal-to-noise ratio, to show that the observable which is most sensitive to features is the power-spectrum. This conclusion would change if we consider the contemporary presence of a feature and a speed of sound c{sub s} < 1, as, in such a case, contributions from an oscillating folded configuration can potentially make the bispectrum the leading observable for feature models.

Bartolo, Nicola; Cannone, Dario; Matarrese, Sabino, E-mail: nicola.bartolo@pd.infn.it, E-mail: dario.cannone@pd.infn.it, E-mail: sabino.matarrese@pd.infn.it [Dipartimento di Fisica e Astronomia ''G. Galilei'', Universit degli Studi di Padova, via Marzolo 8, I-35131 Padova (Italy)

2013-10-01T23:59:59.000Z