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Note: This page contains sample records for the topic "bucket rain gauge" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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1

Optical Rain Gauge and Tipping Bucket Rain Gauge Comparisons  

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

Rain Gauge and Tipping Bucket Rain Gauge Comparisons Rain Gauge and Tipping Bucket Rain Gauge Comparisons at the ARM Climate Research Facility TWP Sites Michael T. Ritsche 1 , Donna J. Holdridge 1 , Amanda Deieso 2 , Amy Kanta 2 , and Jenni Prell 2 1 Environmental Science Division, Argonne National Laboratory, Argonne, IL 2 Department of Geography, Northern Illinois University, DeKalb, IL 1. Introduction Measurement of rainfall and precipitation is a difficult task even in the best of circumstances. Different types of gauges are used depending on the type of precipitation expected (solid or liquid) and the rate at which it falls. The ARM Program uses two types of precipitation sensors in its surface meteorological systems: the optical rain gauge (ORG) and the tipping bucket rain gauge (TBRG). The ORG was originally

2

Disdrometer and Tipping Bucket Rain Gauge Handbook  

SciTech Connect

The Distromet disdrometer model RD-80 and NovaLynx tipping bucket rain gauge model 260-2500E-12 are two devices deployed a few meters apart to measure the character and amount of liquid precipitation. The main purpose of the disdrometer is to measure drop size distribution, which it does over 20 size classes from 0.3 mm to 5.4 mm. The data from both instruments can be used to determine rain rate. The disdrometer results can also be used to infer several properties including drop number density, radar reflectivity, liquid water content, and energy flux. Two coefficients, N0 and ?, from an exponential fit between drop diameter and drop number density, are routinely calculated. Data are collected once a minute. The instruments make completely different kinds of measurements. Rain that falls on the disdrometer sensor moves a plunger on a vertical axis. The disdrometer transforms the plunger motion into electrical impulses whose strength is proportional to drop diameter. The rain gauge is the conventional tipping bucket type. Each tip collects an amount equivalent to 0.01 in. of water, and each tip is counted by a data acquisition system anchored by a Campbell CR1000 data logger.

Bartholomew. MJ

2009-12-01T23:59:59.000Z

3

DOE/SC-ARM/TR-079 Disdrometer and Tipping Bucket Rain Gauge  

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

Disdrometer and Tipping Bucket Rain Gauge Handbook MJ Bartholomew December 2009 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government or any agency thereof. The views and

4

ARM - Instrument - rain  

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

govInstrumentsrain govInstrumentsrain Documentation RAIN : Handbook RAIN : Instrument Mentor Monthly Summary (IMMS) reports RAIN : Data Quality Assessment (DQA) reports ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Instrument : Rain Gauge (RAIN) Beneficiary of Recovery Act funding. Instrument Categories Surface Meteorology General Overview The tipping bucket rain gauge was located next to the disdrometer. It was replaced with a weighing bucket rain gauge in FY2010. Please contact the instrument mentor, if you have any questions. Output Datastreams rain : Rain gauge Primary Measurements The following measurements are those considered scientifically relevant. Precipitation Locations Eastern North Atlantic

5

Comparing TRMM rainfall retrieval with NOAA buoy rain gauge data  

E-Print Network (OSTI)

to December of 2001. TRMM's 3G68 product provides instantaneous rain rate data averaged over 0.5? x 0.5? latitude-longitude grid boxes for the TRMM Microwave Imager (TMI), Precipitation Radar (PR), and a combined algorithm (COMB). The buoy's rain rate data...

Phillips, Amy Blackmore

2002-01-01T23:59:59.000Z

6

An analysis of radar estimated precipitation to rain gauge measurements  

E-Print Network (OSTI)

the surface. These levels included 1.0 1.5@ 2.0 @ 2.5 km, and 3.0 km. Radar precipitation estimates were calculated at each 1.4 2 level using Z = 30ORand Z = 25OR" . The precipitation amounts, as measured by both the gauges and the radar,were used...

Gleason, Byron Edward

1997-01-01T23:59:59.000Z

7

Evaluation of Statistical Rainfall Disaggregation Methods Using Rain-Gauge Information for West-Central Florida  

SciTech Connect

Rainfall disaggregation in time can be useful for the simulation of hydrologic systems and the prediction of floods and flash floods. Disaggregation of rainfall to timescales less than 1 h can be especially useful for small urbanized watershed study, and for continuous hydrologic simulations and when Hortonian or saturation-excess runoff dominates. However, the majority of rain gauges in any region record rainfall in daily time steps or, very often, hourly records have extensive missing data. Also, the convective nature of the rainfall can result in significant differences in the measured rainfall at nearby gauges. This study evaluates several statistical approaches for rainfall disaggregation which may be applicable using data from West-Central Florida, specifically from 1 h observations to 15 min records, and proposes new methodologies that have the potential to outperform existing approaches. Four approaches are examined. The first approach is an existing direct scaling method that utilizes observed 15 min rainfall at secondary rain gauges, to disaggregate observed 1 h rainfall at more numerous primary rain gauges. The second approach is an extension of an existing method for continuous rainfall disaggregation through statistical distributional assumptions. The third approach relies on artificial neural networks for the disaggregation process without sorting and the fourth approach extends the neural network methods through statistical preprocessing via new sorting and desorting schemes. The applicability and performance of these methods were evaluated using information from a fairly dense rain gauge network in West-Central Florida. Of the four methods compared, the sorted neural networks and the direct scaling method predicted peak rainfall magnitudes significantly better than the remaining techniques. The study also suggests that desorting algorithms would also be useful to randomly replace the artificial hyetograph within a rainfall period.

Murch, Renee Rokicki [Florida Department of Transportation; Zhang, Jing [University of South Florida; Ross, Mark [University of South Florida; Ganguly, Auroop R [ORNL; Nachabe, Mahmood [University of South Florida

2008-01-01T23:59:59.000Z

8

A Real-Time Algorithm for Merging Radar QPEs with Rain Gauge Observations and Orographic Precipitation Climatology  

Science Journals Connector (OSTI)

High-resolution, accurate quantitative precipitation estimation (QPE) is critical for monitoring and prediction of flash floods and is one of the most important drivers for hydrological forecasts. Rain gauges provide a direct measure of ...

Jian Zhang; Youcun Qi; Carrie Langston; Brian Kaney; Kenneth Howard

2014-10-01T23:59:59.000Z

9

Changes in Tropical Rainfall Measuring Mission (TRMM) retrievals due to the orbit boost estimated from rain gauge data  

E-Print Network (OSTI)

-boost period and ~1.5% low during the post-boost period. The mean change in bias relative to the gauges is approximately 0.4 mm day^-1. The PR is biased significantly low relative to the gauges during both boost periods. The change in bias is rain rate...

DeMoss, Jeremy

2009-06-02T23:59:59.000Z

10

Network Bucket Testing Lars Backstrom  

E-Print Network (OSTI)

Network Bucket Testing Lars Backstrom Facebook, Inc. 1601 University Ave. Palo Alto, CA 94304. Jon fraction of the total user population and measuring its effect on this exposed group. For traditional uses of this technique, uniform independent sampling of the population is often enough to produce an exposed group

Kleinberg, Jon

11

Second Stage Turbine Bucket Airfoil.  

DOE Patents (OSTI)

The second-stage buckets have airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I wherein Z is a perpendicular distance from a plane normal to a radius of the turbine centerline and containing the X and Y values with the Z value commencing at zero in the X, Y plane at the radially innermost aerodynamic section of the airfoil and X and Y are coordinate values defining the airfoil profile at each distance Z. The X, Y and Z values may be scaled as a function of the same constant or number to provide a scaled-up or scaled-down airfoil section for the bucket.

Xu, Liming (Simpsonville, SC); Ahmadi, Majid (Simpsonville, SC); Humanchuk, David John (Simpsonville, SC); Moretto, Nicholas (Clifton Park, NY); Delehanty, Richard Edward (Maineville, OH)

2003-05-06T23:59:59.000Z

12

ARM - Datastreams - rain  

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

Datastreamsrain Datastreamsrain Documentation Data Quality Plots Citation DOI: 10.5439/1025264 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Datastream : RAIN Rain gauge Active Dates 2006.03.01 - 2014.01.09 Measurement Categories Atmospheric State Originating Instrument Rain Gauge (RAIN) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable Altitude above mean sea level m alt Base time in Epoch seconds since 1970-1-1 0:00:00 0:00 base_time Record with error unitless error_latch ( time ) Frequency average, sensor 1 Hz frequency1 ( time ) Frequency average, sensor 2 Hz frequency2 ( time )

13

Turbine bucket natural frequency tuning rib  

DOE Patents (OSTI)

A tuning rib is added preferably in the aft cavity of a cored turbine bucket to alter the bucket's natural frequencies. The tuning rib may be a solid rib or a segmented rib and is particularly suited for altering high order frequency modes such as 2T, 4F and 1-3S. As such, detrimental crossings of natural bucket frequencies and gas turbine stimuli can be avoided to thereby improve the reliability of a gas turbine without impacting other features of the bucket that are important to the performance of the gas turbine.

Wang, John Zhiqiang (Greenville, SC); Norton, Paul Francis (Greenville, SC); Barb, Kevin Joseph (Halfmoon, NY); Jacala, Ariel Caesar-Prepena (Simpsonville, SC)

2002-01-01T23:59:59.000Z

14

Prototype bucket foundation for wind turbines  

E-Print Network (OSTI)

Prototype bucket foundation for wind turbines -natural frequency estimation Lars Bo Ibsen Morten bucket foundation for wind turbines -natural frequency estimation by Lars Bo Ibsen Morten Liingaard foundation for wind turbines--natural frequency estimation" is divided into four numbered sections

15

Second-stage turbine bucket airfoil  

DOE Patents (OSTI)

The second-stage buckets have airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I wherein Z is a perpendicular distance from a plane normal to a radius of the turbine centerline and containing the X and Y values with the Z value commencing at zero in the X, Y plane at the radially innermost aerodynamic section of the airfoil and X and Y are coordinate values defining the airfoil profile at each distance Z. The X and Y values may be scaled as a function of the same constant or number to provide a scaled-up or scaled-down airfoil section for the bucket. The second-stage wheel has sixty buckets.

Wang, John Zhiqiang (Greenville, SC); By, Robert Romany (Simpsonville, SC); Sims, Calvin L. (Mauldin, SC); Hyde, Susan Marie (Piedmont, SC)

2002-01-01T23:59:59.000Z

16

Gas turbine bucket wall thickness control  

DOE Patents (OSTI)

A core for use in casting a turbine bucket including serpentine cooling passages is divided into two pieces including a leading edge core section and a trailing edge core section. Wall thicknesses at the leading edge and the trailing edge of the turbine bucket can be controlled independent of each other by separately positioning the leading edge core section and the trailing edge core section in the casting die. The controlled leading and trailing edge thicknesses can thus be optimized for efficient cooling, resulting in more efficient turbine operation.

Stathopoulos, Dimitrios (Glenmont, NY); Xu, Liming (Greenville, SC); Lewis, Doyle C. (Greer, SC)

2002-01-01T23:59:59.000Z

17

Third-stage turbine bucket airfoil  

DOE Patents (OSTI)

The third-stage buckets have airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I wherein Z is a perpendicular distance from a plane normal to a radius of the turbine centerline and containing the X and Y values with the Z value commencing at zero in the X, Y plane at the radially innermost aerodynamic section of the airfoil and X and Y are coordinates defining the airfoil profile at each distance Z. The X, Y and Z values may be scaled as a function of the same constant or number to provide a scaled-up or scaled-down airfoil section for the bucket.

Pirolla, Peter Paul (Greenville, SC); Siden, Gunnar Leif (Greenville, SC); Humanchuk, David John (Simpsonville, SC); Brassfield, Steven Robert (Cincinnati, OH); Wilson, Paul Stuart (New Richmond, OH)

2002-01-01T23:59:59.000Z

18

Argonne Lab Director Peter Littlewood accepts Ice Bucket Challenge...  

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

Argonne Lab Director Peter Littlewood accepts Ice Bucket Challenge Share Browse By - Any - Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering...

19

Removable inner turbine shell with bucket tip clearance control  

DOE Patents (OSTI)

A turbine includes a plurality of inner shell sections mounting first and second stage nozzle and shroud portions. The inner shell sections are pinned to an outer containment shell formed of sections to preclude circumferential movement of the inner shell relative to the outer shell and enable thermal expansion and contraction of the inner shell relative to the outer shell. Positive bucket tip clearance control is afforded by passing a thermal medium about the inner shell in heat transfer relation with the shrouds about the first and second stage bucket tips, the thermal medium being provided from a source of heating/cooling fluid independent of the turbine. Access is provided to the rotor and turbine buckets by removing the outer and inner shell sections.

Sexton, Brendan F. (Clifton Park, NY); Knuijt, Hans M. (Niskayuna, NY); Eldrid, Sacheverel Q. (Saratoga Springs, NY); Myers, Albert (Amsterdam, NY); Coneybeer, Kyle E. (Schenectady, NY); Johnson, David Martin (Ballston Lake, NY); Kellock, Iain R. (Clifton Park, NY)

2000-01-01T23:59:59.000Z

20

ARM - Feature Stories and Releases Article  

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

bucket rain gauge and the optical rain gauge. "There seemed to be a constant stream of parents and children in front of the demonstrations," Jenni said. "It was very refreshing...

Note: This page contains sample records for the topic "bucket rain gauge" 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

NASA/TM-1998-208419 Buckets: Aggregative, Intelligent Agents  

E-Print Network (OSTI)

May 1998 NASA/TM-1998-208419 Buckets: Aggregative, Intelligent Agents for Publishing Michael L Dominion University, Norfolk, Virginia #12;The NASA STI Program Office ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific

Nelson, Michael L.

22

Chlorophyll and acid rain  

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

Chlorophyll and acid rain Chlorophyll and acid rain Name: beachbum Status: N/A Age: N/A Location: N/A Country: N/A Date: Around 1993 Question: A while ago I read an article that stated that after a plant received acid rain, there seemed to be less of chlorophyll a and b in the plant. I was wondering where does the chlorophyll go and what is the actual process (cell structure affected?). Replies: I think that less chlorophyll being present would be more likely a result of less being produced. Plant cell constantly turn over cell material, it will also constantly produce more. So if one compares a plant not exposed to acid rain (presumably producing a normal amount of chlorophyll and the exposed plant then one sees that the exposed plant has less chlorophyll than the unexposed plant. I do not think I can answer the rest of your question.

23

(Acid rain workshop)  

SciTech Connect

The traveler presented a paper entitled Susceptibility of Asian Ecosystems to Soil-Mediated Acid Rain Damage'' at the Second Workshop on Acid Rain in Asia. The workshop was organized by the Asian Institute of Technology (Bangkok, Thailand), Argonne National Laboratory (Argonne, Illinois), and Resource Management Associates (Madison, Wisconsin) and was sponsored by the US Department of Energy, the United Nations Environment Program, the United Nations Economic and Social Commission for Asia and the Pacific, and the World Bank. Papers presented on the first day discussed how the experience gained with acid rain in North America and Europe might be applied to the Asian situation. Papers describing energy use projections, sulfur emissions, and effects of acid rain in several Asian countries were presented on the second day. The remaining time was allotted to discussion, planning, and writing plans for a future research program.

Turner, R.S.

1990-12-05T23:59:59.000Z

24

Indexing of Spatio-Temporal Telemetric Data Based on Adaptive Multi-Dimensional Bucket Index  

Science Journals Connector (OSTI)

This paper describes the idea of a multi-dimensional bucket index designed for efficient indexing of telemetric readings. This data structure answers spatio-temporal range queries concerning utility usage within user selected region and time. In addition, ... Keywords: bucket index, exponential smoothing, indexing of telemetric readings, spatial data warehouse, utility usage prediction

Marcin Gorawski; Adam Dyga

2009-02-01T23:59:59.000Z

25

Indexing of Spatio-Temporal Telemetric Data Based on Adaptive Multi-Dimensional Bucket Index  

Science Journals Connector (OSTI)

This paper describes the idea of a multi-dimensional bucket index designed for efficient indexing of telemetric readings. This data structure answers spatio-temporal range queries concerning utility usage within user selected region and time. In addition, ... Keywords: bucket index, exponential smoothing, indexing of telemetric readings, spatial data warehouse, utility usage prediction

Marcin Gorawski; Adam Dyga

2009-01-01T23:59:59.000Z

26

Singin' in the Rain  

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

Singin' in Singin' in the Rain News Featured Articles 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Science Headlines Presentations & Testimony News Archives Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 11.25.13 Singin' in the Rain Ultra water-repellent material developed at Brookhaven Lab may lead to many warming applications. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo Brookhaven Lab physicist Antonio Checco. Photo courtesy of Brookhaven National Laboratory When it comes to designing extremely water-repellent surfaces, shape and size matter. That's the finding of a group of scientists at the U.S. Department of Energy's Brookhaven National Laboratory, who investigated the

27

West Texas Rain  

E-Print Network (OSTI)

and Water Commission, Culberson County Underground Water District and county officials to install a 2,500-gallon rainwater harvesting tank at the Culberson County Courthouse. West Texas Rain Rainwater harvesting demonstration sites save water and money... (Above Left) One of the three rainwater harvesting demonstrations is located at the Culberson County Courthouse in Van Horn. This 2,500-gallon tank has been installed to catch and store the rainwater. (Above Right) Landscape irrigation using...

Supercinski, Danielle

2006-01-01T23:59:59.000Z

28

Bearing capacity and technical advantages of composite bucket foundation of offshore wind turbines  

Science Journals Connector (OSTI)

Based on mechanical characteristics such as large vertical load, large horizontal load, large bending moment and complex geological conditions, a large scale composite bucket foundation (CBF) is put forward. B...

Jijian Lian ???; Liqiang Sun ???; Jinfeng Zhang ???…

2011-04-01T23:59:59.000Z

29

Evlauation of Smart Irrigation Controllers: Year 2012 Results  

E-Print Network (OSTI)

with sensors that record temperature, relative humidity (or dew point temperature) wind speed and solar radiation for use in calculating ETo with a form of the Penman equation. MATERIALS AND METHODS Testing Equipment and Procedures Two smart... Name Type Communication Method On-Site Sensors 1 Rain Shutoff A ET Water ET Pager None B Rainbird ET Manager Cartridge ET Pager Tipping Bucket Rain Gauge C Hunter ET System Sensor Based - Tipping Bucket Rain Gauge, Pyranometer...

Swanson, C.; Fipps, G.

2013-07-18T23:59:59.000Z

30

Gas-dynamic and thermal processes under film cooling end surfaces of a gas-turbine blade bucket  

Science Journals Connector (OSTI)

Results from an investigation of using swirled coolant jets to obtain efficient film cooling of a turbine bucket while minimizing the total losses in it are presented.

V. V. Lebedev

2010-02-01T23:59:59.000Z

31

Anti-liquefaction characteristics of composite bucket foundations for offshore wind turbines  

Science Journals Connector (OSTI)

Occurrence of liquefaction in saturated sandy deposits under structure foundation can cause a wide range of structural damages from minor settlement to general failure because of bearing capacity loss. By comparing traditional foundations for offshore wind turbines the soil inside and underneath the composite bucket foundation is subjected to the overburden pressure from the foundation self-weight and constrained by a half-closed bucket skirt. The objective of this paper is to clarify the effects of the soil-foundation interaction on the soil liquefaction resistance around the skirt and under the foundation. The dynamic response of the composite bucket foundation during earthquake including coupled soil mode of porous media is calculated using the ADINA finite-element program. A typical configuration of composite bucket foundation is used for the analysis and two earthquake waves (peak ground accelerations of 0.035?g and 0.22?g) are applied as the base acceleration. The results show that the composite bucket foundation exhibited good resistance to seismic action by improving the anti-liquefaction capacity of the soil inside and under the foundation because of the overburden pressure of the self-weight and the constraint effect of the skirt.

2014-01-01T23:59:59.000Z

32

Temporal Downscaling of Daily Gauged Precipitation by Application of a Satellite Product for Flood Simulation in a Poorly Gauged Basin and Its Evaluation with Multiple Regression Analysis  

Science Journals Connector (OSTI)

The study demonstrates that the temporal downscaling of rain gauge–measured precipitation with satellite-based precipitation estimates enhances the accuracy of hydrological simulations, especially for flood duration. Multiple regression analysis ...

Masahiro Ryo; Oliver C. Saavedra Valeriano; Shinjiro Kanae; Tinh Dang Ngoc

2014-04-01T23:59:59.000Z

33

Test on muddy soil reinforcement by negative pressure and electro-osmosis inside cover-bearing-type bucket foundation for offshore wind turbines  

Science Journals Connector (OSTI)

Cover-bearing-type bucket foundation for offshore wind turbines has been paid more and more attention...

Puyang Zhang ???; Hongyan Ding ???; Shaohua Zhai ???…

2013-02-01T23:59:59.000Z

34

The Partially Stopped Leaky Bucket: An Efficient Traffic Regulator with Constant  

E-Print Network (OSTI)

1 The Partially Stopped Leaky Bucket: An Efficient Traffic Regulator with Constant Time Implementation Florin Ciucu, Brian L. Mark , and Robert Simon Lab. of Cooperative Work Environment Dept. of Computer Science Dept. of Electrical and Computer Engineering School of Information Technology

Ciucu, Florin

35

"A veritable bucket of facts" origins of the data base management system  

Science Journals Connector (OSTI)

The data base concept derives from early military on-line systems, and was not originally associated with the specific technologies of modern data base management systems. While the idea of an integrated data base, or "bucket of facts," spread into corporate ...

Thomas Haigh

2006-06-01T23:59:59.000Z

36

Production, Manufacturing and Logistics Bucket brigades revisited: Are they always effective?  

E-Print Network (OSTI)

are typically U-shaped, and workers process garments as a team. In a TSS line, each worker picks up a task the conditions under which bucket brigades continue to be effective (compared to a traditional static allocation and processes (also car- ries) it at each station until he gets bumped by a 0377-2217/$ - see front matter Ã?

Armbruster, Dieter

37

A model study of the effect of bucket dentations on a ski-jump spillway jet: with a mathematical analysis of critical bucket radius determination.  

E-Print Network (OSTI)

- tute for an energy dissipator. Its primary purpose is merely to throw the water downstream to a place where the scour which is certain to occur will not constitute a danger to the dam (or the bucket itself if it is separate from the dam), the river... to the surface area of the jet and the square of the relative velocity of the jet to the air. ~~ The final product of an efficient dissipation of energy, using a jet trajectory as the xnethod, will be a spray instead of a concentrated jet. This occurence may...

Gladwell, John Stuart

2012-06-07T23:59:59.000Z

38

Japan no help to rain forests  

Science Journals Connector (OSTI)

... TokyoJAPAN is severely criticized for its role in the destruction of the world's tropical rain ... .

David Swinbanks

1989-04-20T23:59:59.000Z

39

NEWTON: Why Does It Rain  

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

Why Does It Rain? Why Does It Rain? Name: Drama Status: student Grade: K-3 Location: FL Country: USA Date: Fall 2011 Question: Why does it rain? Replies: Drama, When water is heated it evaporates into the air. You cannot see the water in the air, but sometimes you can feel it (especially when it is hot outside). Have you ever noticed that on some warm days it is really humid (sticky and sweaty) and other warm days it feels dry? You might have also noticed that in the morning, when the air is cool, you might find dew or mist on the leaves and grass. This occurs because cold air cannot hold much of moisture. There is a limit to the amount of water that air can hold. This limit is known as the saturation limit (or dew point). When the air is completely saturated and cannot hold any more water, then it comes down as rain (and leaves all that heat in the air).

40

A bunch to bucket phase detector for the RHIC LLRF upgrade platform  

SciTech Connect

As part of the overall development effort for the RHIC LLRF Upgrade Platform [1,2,3], a generic four channel 16 bit Analog-to-Digital Converter (ADC) daughter module was developed to provide high speed, wide dynamic range digitizing and processing of signals from DC to several hundred megahertz. The first operational use of this card was to implement the bunch to bucket phase detector for the RHIC LLRF beam control feedback loops. This paper will describe the design and performance features of this daughter module as a bunch to bucket phase detector, and also provide an overview of its place within the overall LLRF platform architecture as a high performance digitizer and signal processing module suitable to a variety of applications. In modern digital control and signal processing systems, ADCs provide the interface between the analog and digital signal domains. Once digitized, signals are then typically processed using algorithms implemented in field programmable gate array (FPGA) logic, general purpose processors (GPPs), digital signal processors (DSPs) or a combination of these. For the recently developed and commissioned RHIC LLRF Upgrade Platform, we've developed a four channel ADC daughter module based on the Linear Technology LTC2209 16 bit, 160 MSPS ADC and the Xilinx V5FX70T FPGA. The module is designed to be relatively generic in application, and with minimal analog filtering on board, is capable of processing signals from DC to 500 MHz or more. The module's first application was to implement the bunch to bucket phase detector (BTB-PD) for the RHIC LLRF system. The same module also provides DC digitizing of analog processed BPM signals used by the LLRF system for radial feedback.

Smith, K.S.; Harvey, M.; Hayes, T.; Narayan, G.; Polizzo, S.; Severino, F.

2011-03-28T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

Rain  

E-Print Network (OSTI)

fire, a woodchip flaring in his cupped palm as he passed. A fireman had come out after Brusher from the entrance of the fire temple across the way. The king summarily returned the enchanted wave of the man-boy, whose longish face became doubly...

Sparks, William Joseph

1992-01-01T23:59:59.000Z

42

WIND/RAIN BACKSCATTER MODELING AND WIND/RAIN RETRIEVAL FOR SCATTEROMETER AND  

E-Print Network (OSTI)

/rain backscatter model is developed that has inputs of surface rain rate, incidence angle, wind speed, wind from rain causes estimated wind speeds to be biased high and estimated wind directions to be biased directions are used as the wind direction estimate and the wind speed is derived from SAR by inversion

Long, David G.

43

Hydrodynamic motion of a large prestressed concrete bucket foundation for offshore wind turbines  

Science Journals Connector (OSTI)

A large prestressed concrete bucket foundation (LPCBF) was used for the first offshore wind turbine in the Qidong sea area of Jiangsu Province in China. The most critical technique of the foundation is the self-floating towing technique based on a reasonable subdivision inside the bucket. To predict the dynamic behaviors of the LPCBF in waves supported by the air cushion the hydrodynamic software MOSES is used to simulate the three-dimensional motion of the foundation in the towing construction site. The prototype foundation models are established using MOSES with a water draft of 4?m 5?m and 6?m in given environmental conditions. The results show that the hydrodynamic responses of the large floater with air cushions depend not only on the wave conditions but also on the mass of the water column air cushion height and air pressure distribution. In addition the hydrodynamic characteristics can be tuned resulting in small dynamic responses in a particular sea state by changing the draft and water plug height. The floating technique of the LPCBF with supported air cushions in waves is highly competitive for saving cost while using few expensive types of equipment during the towing transportation.

Puyang Zhang; Hongyan Ding; Conghuan Le

2013-01-01T23:59:59.000Z

44

SAR Imagery: Rain Forests, South America  

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

Images of Rain Forests in South America Images of Rain Forests in South America The ORNL DAAC now offers a CD-ROM volume containing Synthetic Aperture Radar (SAR) imagery of the rain forest region of South America, including the Amazon Basin. The images were collected during 1995-1996 as part of an international project led by the National Space Development Agency of Japan (NASDA) to map the world's rain forest regions to high resolution by means of SAR. The 4-disc volume--entitled "JERS-1 SAR Global Rain Forest Mapping Project: Vol. AM-1, South America"--is made available under the auspices of the Large-Scale Biosphere-Atmosphere Experiment in Amazonia (LBA). These CDs can be ordered through the ORNL DAAC at http://daac.ornl.gov/prepaks.shtml (look for the "LBA" listings).

45

Euclidean Gauge Transformation  

Science Journals Connector (OSTI)

The Green's function gauge transformation induced by the elimination of the longitudinal field in Euclidean electrodynamics is discussed.

Julian Schwinger

1960-03-01T23:59:59.000Z

46

Peer review plan muddies acid rain talks  

Science Journals Connector (OSTI)

Bilateral U.S./Canadian talks on an acid rain treaty are being buffeted by bitter winds of national politics and uncertain science. The latest ill wind to blow north, as far as the Canadians are concerned, is the U.S. plan to have peer reviewed all ...

1982-05-10T23:59:59.000Z

47

CONDENSATION OF CHONDRULES: CONDITIONS FOR "FIERY RAIN".  

E-Print Network (OSTI)

CONDENSATION OF CHONDRULES: CONDITIONS FOR "FIERY RAIN". L. Grossman1,2 and A. V. Fedkin1 . 1 Dept little Na condenses above the solidus, and Na2O contents of most chondrules plot above Na2O was condensed at near-liquidus temperatures. In the context of melting chondrule precursors, we showed that Na

Grossman, Lawrence

48

Wind/Rain Backscatter Modeling and Wind/Rain Retrieval for Scatterometer and Synthetic Aperture Radar.  

E-Print Network (OSTI)

??Using co-located space-borne satellite (TRMM PR, ESCAT on ERS 1/2) measurements, and numerical predicted wind fields (ECMWF), the sensitivity of C-band backscatter measurement to rain… (more)

Nie, Congling

2008-01-01T23:59:59.000Z

49

Multi-Index Rain Detection: A New Approach for Regional Rain Area Detection from Remotely Sensed Data  

Science Journals Connector (OSTI)

In this article, a new approach called Multi-Index Rain Detection (MIRD) is suggested for regional rain area detection and was tested for India using Kalpana-1 satellite data. The approach was developed based on the following hypothesis: better ...

Shruti Upadhyaya; R. Ramsankaran

2014-12-01T23:59:59.000Z

50

Non-Abelian Gauge Fields. Lorentz Gauge Formulation  

Science Journals Connector (OSTI)

Non-Abelian vector gauge theory is given a first-order Lorentz gauge formulation and then transformed into the radiation gauge. The result agrees with the independently constructed radiation gauge theory. There is a brief discussion of the axial gauge.

Julian Schwinger

1963-04-01T23:59:59.000Z

51

High temperature pressure gauge  

DOE Patents (OSTI)

A high temperature pressure gauge comprising a pressure gauge positioned in fluid communication with one end of a conduit which has a diaphragm mounted in its other end. The conduit is filled with a low melting metal alloy above the diaphragm for a portion of its length with a high temperature fluid being positioned in the remaining length of the conduit and in the pressure gauge.

Echtler, J. Paul (Pittsburgh, PA); Scandrol, Roy O. (Library, PA)

1981-01-01T23:59:59.000Z

52

Arc discharge regulation of a megawatt hot cathode bucket ion source for the experimental advanced superconducting tokamak neutral beam injector  

SciTech Connect

Arc discharge of a hot cathode bucket ion source tends to be unstable what attributes to the filament self-heating and energetic electrons backstreaming from the accelerator. A regulation method, which based on the ion density measurement by a Langmuir probe, is employed for stable arc discharge operation and long pulse ion beam generation. Long pulse arc discharge of 100 s is obtained based on this regulation method of arc power. It establishes a foundation for the long pulse arc discharge of a megawatt ion source, which will be utilized a high power neutral beam injection device.

Xie Yahong; Hu Chundong; Liu Sheng; Jiang Caichao; Li Jun; Liang Lizhen [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China); Collaboration: NBI Team

2012-01-15T23:59:59.000Z

53

Fraud in the acid rain debate  

SciTech Connect

Electric utility executives, according to the author, and millions of other Americans are the victims of a gigantic fraud being carried on in the name of controlling acid rain. This fraud, states the author, involves the distorted, dire image of acidity in nature being created by environmental groups, politicians and others - to gain public sympathy for their legislative goals. The alleged fraud involves the very nature of the legislation being promoted as a low-cost cure for acid rain. On the basis of scientific evidence to date there is no assurance it will reduce acidity by any appreciable amount, but on the other hand it most certainly will cost users of electricity hundreds of billions of dollars in new costs. What has already happened to the nuclear industry is also meant for coal.

Bagge, C.

1984-06-01T23:59:59.000Z

54

Renormalization and Gauge Invariance  

Science Journals Connector (OSTI)

......ultra-violet is unavoidable. ) E-mail: g.thooft@phys.uu.nl Internet: http://www.phys.uu.nl/~thooft/ Renormalization...Having approximate gauge-invariance in the UV limit is not good enough! On the contrary, a completely gauge-invariant Yang-Mills......

Gerard 't Hooft

2007-05-01T23:59:59.000Z

55

Gauge Invariance and Mass  

Science Journals Connector (OSTI)

It is argued that the gauge invariance of a vector field does not necessarily imply zero mass for an associated particle if the current vector coupling is sufficiently strong. This situation may permit a deeper understanding of nucleonic charge conservation as a manifestation of a gauge invariance, without the obvious conflict with experience that a massless particle entails.

Julian Schwinger

1962-01-01T23:59:59.000Z

56

Optical heat flux gauge  

DOE Patents (OSTI)

A heat flux gauge comprising first and second thermographic phosphor layers separated by a layer of a thermal insulator. The gauge may be mounted on a surface with the first thermographic phosphor in contact with the surface. A light source is directed at the gauge, causing the phosphors to luminesce. The luminescence produced by the phosphors is collected and its spectra analyzed in order to determine the heat flux on the surface. First and second phosphor layers must be different materials to assure that the spectral lines collected will be distinguishable.

Noel, Bruce W. (Espanola, NM); Borella, Henry M. (Santa Barbara, CA); Cates, Michael R. (Oak Ridge, TN); Turley, W. Dale (Santa Barbara, CA); MaCarthur, Charles D. (Clayton, OH); Cala, Gregory C. (Dayton, OH)

1991-01-01T23:59:59.000Z

57

Optical heat flux gauge  

DOE Patents (OSTI)

A heat flux gauge comprising first and second thermographic phosphor layers separated by a layer of a thermal insulator wherein each thermographic layer comprises a plurality of respective thermographic phosphors. The gauge may be mounted on a surface with the first thermographic phosphor in contact with the surface. A light source is directed at the gauge, causing the phosphors to luminesce. The luminescence produced by the phosphors is collected and its spectra analyzed in order to determine the heat flux on the surface. First and second phosphor layers must be different materials to assure that the spectral lines collected will be distinguishable.

Noel, Bruce W. (Espanola, NM); Borella, Henry M. (Santa Barbara, CA); Cates, Michael R. (Oak Ridge, TN); Turley, W. Dale (Santa Barbara, CA); MacArthur, Charles D. (Clayton, OH); Cala, Gregory C. (Dayton, OH)

1991-01-01T23:59:59.000Z

58

Optical heat flux gauge  

DOE Patents (OSTI)

A heat flux gauge comprising first and second thermographic phosphor layers separated by a layer of a thermal insulator, wherein each thermographic layer comprises a plurality of respective thermographic sensors in a juxtaposed relationship with respect to each other. The gauge may be mounted on a surface with the first thermographic phosphor in contact with the surface. A light source is directed at the gauge, causing the phosphors to luminesce. The luminescence produced by the phosphors is collected and its spectra analyzed in order to determine the heat flux on the surface. First and second phosphor layers must be different materials to assure that the spectral lines collected will be distinguishable.

Noel, Bruce W. (Espanola, NM); Borella, Henry M. (Santa Barbara, CA); Cates, Michael R. (Oak Ridge, TN); Turley, W. Dale (Santa Barbara, CA); MacArthur, Charles D. (Clayton, OH); Cala, Gregory C. (Dayton, OH)

1991-01-01T23:59:59.000Z

59

Gauge Theory and Renormalization  

Science Journals Connector (OSTI)

Early developments leading to renormalizable non-Abelian gauge theories for the weak, electromagnetic and strong interactions, are discussed from a personal viewpoint. They drastically improved our view of the...

Gerard’t Hooft

1996-01-01T23:59:59.000Z

60

The effect of rain on freeway capacity  

E-Print Network (OSTI)

. The procedure used was basically a process of selection and processing of data from historical records. The facility used as a source of traific information was t' he Gulf Freeway in Houston, Texas, and rs. infall records were obtained from the Weather... to separate acceptable data, and the accepted capacity figures were related to the weather condition of wet or dry which prevs. iled on the relevant occs. sion. The results showed that rain does have a significant effect on freevray capacity which is very...

Jones, Edward Roy

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

There's a Patch in The Ocean [There's a Hole in The Bucket (D/D)] 1. There's a Dpatch in the Gocean,  

E-Print Network (OSTI)

There's a Patch in The Ocean [There's a Hole in The Bucket (D/D)] 1. There's a Dpatch it A7to Dwaste. 10. Let's Dclean up that Gtrash patch, Dear Granny, dear Granny, Let's Dclean up that Gtrash patch, Dear Granny, A7that Dpatch. See this link (en.wikipedia.org/wiki/Great Pacific Garbage

Nightingale, Peter

62

Lattice Gauge Tensor Networks  

E-Print Network (OSTI)

We present a unified framework to describe lattice gauge theories by means of tensor networks: this framework is efficient as it exploits the high amount of local symmetry content native of these systems describing only the gauge invariant subspace. Compared to a standard tensor network description, the gauge invariant one allows to speed-up real and imaginary time evolution of a factor that is up to the square of the dimension of the link variable. The gauge invariant tensor network description is based on the quantum link formulation, a compact and intuitive formulation for gauge theories on the lattice, and it is alternative to and can be combined with the global symmetric tensor network description. We present some paradigmatic examples that show how this architecture might be used to describe the physics of condensed matter and high-energy physics systems. Finally, we present a cellular automata analysis which estimates the gauge invariant Hilbert space dimension as a function of the number of lattice sites and that might guide the search for effective simplified models of complex theories.

Pietro Silvi; Enrique Rico; Tommaso Calarco; Simone Montangero

2014-10-12T23:59:59.000Z

63

Lattice Gauge Tensor Networks  

E-Print Network (OSTI)

We present a unified framework to describe lattice gauge theories by means of tensor networks: this framework is efficient as it exploits the high amount of local symmetry content native of these systems describing only the gauge invariant subspace. Compared to a standard tensor network description, the gauge invariant one allows to speed-up real and imaginary time evolution of a factor that is up to the square of the dimension of the link variable. The gauge invariant tensor network description is based on the quantum link formulation, a compact and intuitive formulation for gauge theories on the lattice, and it is alternative and can be combined with the global symmetric tensor network description. We present some paradigmatic examples that show how this architecture might be used to describe the physics of condensed matter and high-energy physics systems. Finally, we present a cellular automata analysis which estimates the gauge invariant Hilbert space dimension as a function of the number of lattice sites...

Silvi, Pietro; Calarco, Tommaso; Montangero, Simone

2014-01-01T23:59:59.000Z

64

Cloud Computing: Rain-Clouds System  

E-Print Network (OSTI)

Abstract — Cloud Computing is the on demand service can be provided to the users at any time. It delivers the software, data access, computing as a service rather than the product. The Cloud application simplifies the computing technology by providing pay-per-use customer relationship. It is the theory that familiar to cheaper devices with low processing power, lower storage capacities, great flexibility and many more things. The security of cloud computing is a major factor as users store sensitive and confidential information with cloud storage providers. The range of these providers may be un trusted and harmful. The purpose of adopting cloud computing in an organization is to decide between a „public cloud ? and „private cloud ? by means of privacy. Public clouds often known as provider clouds are administrated by third parties and services are offered on pay-per-use basis. Private clouds or internal clouds are owned by the single firm but it has some metrics such as lacking of availability of services (such as memory, server) and network resources which leads it to down. Due to this, technology moves toward the concept of “Multi clouds ” or “Rain Clouds”. This paper displays the use of multi-clouds or rain clouds due to its ability to handle the huge amount of data traffic that affect the cloud computing user.

Harinder Kaur

65

A study of the pressure - time development in a hypervelocity gun by using external strain gauges  

E-Print Network (OSTI)

29 29 5. 2 Thermal S rain 29 5. 3 Dy xavxic Strain 31 6. 0 instrumentation 33 Strain Gauges 33 6. 2 Wheatstone Bridge 38 6. 3 Axxplif i. er 41 6. 4 Var'abl Resistance Transducer Amplifier vi Section Page 6. 5 6. 6 Oscilloscope Static... Approximation Dynamic Displacement vs Time Environment 23 26 27 10 12 13 14 15 16 17 18 Step Pulse Ideal Step Wave Trace Step Wave And Rise Time Trace Gauge Length Versus Wave I. ength Whentstone Bridge Amplifier And Wheatstone Bridge...

Tower, Michael McKenzie

1969-01-01T23:59:59.000Z

66

The Effect of Rain on ERS Scatterometer Measurements  

E-Print Network (OSTI)

on the sea surface also generate turbulence in the upper water layer which attenuates the capillary wave transparent to C-band scatterometer sig- nals due to the fact that atmospheric attenuation and backscat- ter measurements in rainy conditions [1] [2]. In a raining area, rain striking the water surface creates splash

Long, David G.

67

Rain increases the energy cost of bat flight  

Science Journals Connector (OSTI)

...properly cited. Rain increases the energy cost of bat flight Christian C. Voigt...moistening of their body inflicts energy costs on flight by reducing lift and...test the idea that rain imposes energy costs on flying bats. We quantified...

2011-01-01T23:59:59.000Z

68

Gravity, Gauges and Clocks  

E-Print Network (OSTI)

We discuss the definitions of standard clocks in theories of gravitation. These definitions are motivated by the invariance of actions under different gauge symmetries. We contrast the definition of a standard Weyl clock with that of a clock in general relativity and argue that the historical criticisms of theories based on non-metric compatible connections by Einstein, Pauli and others must be considered in the context of Weyl's original gauge symmetry. We argue that standard Einsteinian clocks can be defined in non-Riemannian theories of gravitation by adopting the Weyl group as a local gauge symmetry that {\\it preserves the metric} and discuss the hypothesis that atomic clocks may be adopted to measure proper time in the presence of non-Riemannian gravitational fields. These ideas are illustrated in terms of a recently developed model of gravitation based on a non-Riemannian space-time geometry.

Pierre Teyssandier; Robin W Tucker

1995-10-23T23:59:59.000Z

69

E-Print Network 3.0 - artificial acid rain Sample Search Results  

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

the world. How does rain become ... Source: Jones, Clive G. - Cary Institute of Ecosystem Studies Collection: Environmental Sciences and Ecology 7 Effect of acid rain on...

70

E-Print Network 3.0 - acid rain effects Sample Search Results  

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

of Mexican Mayan monuments. Ingenieria... eroding because of acid rain. Just as water dis- solves an Alka-Seltzer tablet, acid rain erodes... Autonomous University of...

71

Chiral Gauge Theory for Graphene  

E-Print Network (OSTI)

We construct a chiral gauge theory to describe fractionalization of fermions in graphene. Thereby we extend a recently proposed model, which relies on vortex formation. Our chiral gauge fields provide dynamics for the vortices and also couple to the fermions.

R. Jackiw; S. -Y. Pi

2007-01-30T23:59:59.000Z

72

Chiral Gauge Theory for Graphene  

Science Journals Connector (OSTI)

We construct a chiral gauge theory to describe fractionalization of fermions in graphene. Thereby we extend a recently proposed model, which relies on vortex formation. Our chiral gauge fields provide dynamics for the vortices and also couple to the fermions.

R. Jackiw and S.-Y. Pi

2007-06-26T23:59:59.000Z

73

Solar Decathlon: Rain and Shine | Department of Energy  

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

Solar Decathlon: Rain and Shine Solar Decathlon: Rain and Shine Solar Decathlon: Rain and Shine October 20, 2009 - 7:00am Addthis Drew Bittner Web Manager, Office of Energy Efficiency and Renewable Energy Friday marked the end of the Solar Decathlon competition. Team Germany won (for the second time) in a very competitive field, in a ceremony marked by gray skies, cold temperatures and rain. For all the bad weather, however, the mood in DC was very upbeat. This was the fourth Solar Decathlon, an event that has seen great strides since its launch in 2002. The mission of the event is to promote solar energy and energy efficiency in buildings, through innovative engineering and scholarly dedication. I would venture to say that this year might mark the event's greatest success, with TWO teams from Canada, as well as returning

74

Solar Decathlon: Rain and Shine | Department of Energy  

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

Solar Decathlon: Rain and Shine Solar Decathlon: Rain and Shine Solar Decathlon: Rain and Shine October 20, 2009 - 7:00am Addthis Drew Bittner Web Manager, Office of Energy Efficiency and Renewable Energy Friday marked the end of the Solar Decathlon competition. Team Germany won (for the second time) in a very competitive field, in a ceremony marked by gray skies, cold temperatures and rain. For all the bad weather, however, the mood in DC was very upbeat. This was the fourth Solar Decathlon, an event that has seen great strides since its launch in 2002. The mission of the event is to promote solar energy and energy efficiency in buildings, through innovative engineering and scholarly dedication. I would venture to say that this year might mark the event's greatest success, with TWO teams from Canada, as well as returning

75

ARM - Field Campaign - Rain Microphysics Study with Disdrometer and  

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

govCampaignsRain Microphysics Study with Disdrometer and Polarization govCampaignsRain Microphysics Study with Disdrometer and Polarization Radar Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Rain Microphysics Study with Disdrometer and Polarization Radar 2005.04.28 - 2005.06.30 Lead Scientist : Guifu Zhang For data sets, see below. Description Understanding rain microphysics is important for accurate rainfall rate estimation and for improving parameterization in numerical weather prediction (NWP). The NCAR video disdrometer was installed at the ARM site at the Kessler farm. The disdrometer was also put side-by-side with the NSSL disdrometer for comparison/calibration and to study sampling effects. The disdrometer observations were used to verify KOUN polarimeteric radar

76

Two Modes of Change of the Distribution of Rain  

Science Journals Connector (OSTI)

The frequency and intensity of rainfall determine its character and may change with climate. A methodology for characterizing the frequency and amount of rainfall as functions of the rain rate is developed. Two modes of response are defined, one ...

Angeline G. Pendergrass; Dennis L. Hartmann

2014-11-01T23:59:59.000Z

77

Fiber optic gap gauge  

SciTech Connect

A lightweight, small size, high sensitivity gauge for indirectly measuring displacement or absolute gap width by measuring axial strain in an orthogonal direction to the displacement/gap width. The gap gauge includes a preferably titanium base having a central tension bar with springs connecting opposite ends of the tension bar to a pair of end connector bars, and an elongated bow spring connected to the end connector bars with a middle section bowed away from the base to define a gap. The bow spring is capable of producing an axial strain in the base proportional to a displacement of the middle section in a direction orthogonal to the base. And a strain sensor, such as a Fabry-Perot interferometer strain sensor, is connected to measure the axial strain in the base, so that the displacement of the middle section may be indirectly determined from the measurement of the axial strain in the base.

Wood, Billy E. (Livermore, CA); Groves, Scott E. (Brentwood, CA); Larsen, Greg J. (Brentwood, CA); Sanchez, Roberto J. (Pleasanton, CA)

2006-11-14T23:59:59.000Z

78

The Maximal Abelian Gauge in SU(3) Lattice Gauge Theory  

E-Print Network (OSTI)

We gauge fix 600 SU(3) beta=6.0 configurations on a 16^4 lattice to a simple form of the maximal abelian gauge. We project the SU(3) valued links to the U(1)xU(1) subgroup, and extract U(1)xU(1) and monopole string tensions. After gauge fixing to the indirect center gauge, the U(1)xU(1) links are projected to Z(3) and a vortex string tension is measured. The vortex and magnetic current densities are measured.

William W. Tucker; John D. Stack

2001-10-19T23:59:59.000Z

79

Gauge Invariance and Mass. II  

Science Journals Connector (OSTI)

The possibility that a vector gauge field can imply a nonzero mass particle is illustrated by the exact solution of a one-dimensional model.

Julian Schwinger

1962-12-01T23:59:59.000Z

80

E-Print Network 3.0 - acid rain information Sample Search Results  

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

389H)5 389 DIRECT FOLIAR EFFECTS OF SIMULATED ACID RAIN I. DAMAGE, GROWTH... acid rain (pH 5-6, 40, 30 and 2 0) were observed for seedlings of four deciduous tree species...

Note: This page contains sample records for the topic "bucket rain gauge" 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

E-Print Network 3.0 - acid rain researchniva Sample Search Results  

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

389H)5 389 DIRECT FOLIAR EFFECTS OF SIMULATED ACID RAIN I. DAMAGE, GROWTH... acid rain (pH 5-6, 40, 30 and 2 0) were observed for seedlings of four deciduous tree species...

82

E-Print Network 3.0 - acid rain workshop Sample Search Results  

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

389H)5 389 DIRECT FOLIAR EFFECTS OF SIMULATED ACID RAIN I. DAMAGE, GROWTH... acid rain (pH 5-6, 40, 30 and 2 0) were observed for seedlings of four deciduous tree species...

83

E-Print Network 3.0 - acid rain Sample Search Results  

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

389H)5 389 DIRECT FOLIAR EFFECTS OF SIMULATED ACID RAIN I. DAMAGE, GROWTH... acid rain (pH 5-6, 40, 30 and 2 0) were observed for seedlings of four deciduous tree species...

84

E-Print Network 3.0 - acid rains status Sample Search Results  

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

389H)5 389 DIRECT FOLIAR EFFECTS OF SIMULATED ACID RAIN I. DAMAGE, GROWTH... acid rain (pH 5-6, 40, 30 and 2 0) were observed for seedlings of four deciduous tree species...

85

Effects of Rain Attenuation on Satellite Video Transmission  

E-Print Network (OSTI)

. The effectiveness of site diversity as a mitigation technique is also studied. II. WEATHER EFFECTS Satellite path is the major weather effect of concern for satellite communications operating at frequencies aboveEffects of Rain Attenuation on Satellite Video Transmission Yee Hui Lee and Stefan Winkler Nanyang

Winkler, Stefan

86

Composite turbine bucket assembly  

DOE Patents (OSTI)

A composite turbine blade assembly includes a ceramic blade including an airfoil portion, a shank portion and an attachment portion; and a transition assembly adapted to attach the ceramic blade to a turbine disk or rotor, the transition assembly including first and second transition components clamped together, trapping said ceramic airfoil therebetween. Interior surfaces of the first and second transition portions are formed to mate with the shank portion and the attachment portion of the ceramic blade, and exterior surfaces of said first and second transition components are formed to include an attachment feature enabling the transition assembly to be attached to the turbine rotor or disk.

Liotta, Gary Charles; Garcia-Crespo, Andres

2014-05-20T23:59:59.000Z

87

ENRAF gauge reference level calculations  

SciTech Connect

This document describes the method for calculating reference levels for Enraf Series 854 Level Detectors as installed in the tank farms. The reference level calculation for each installed level gauge is contained herein.

Huber, J.H., Fluor Daniel Hanford

1997-02-06T23:59:59.000Z

88

Gauge theory webs and surfaces  

E-Print Network (OSTI)

We analyze the perturbative cusp and closed polygons of Wilson lines for massless gauge theories in coordinate space, and express them as exponentials of two-dimensional integrals. These integrals have geometric interpretations, which link renormalization scales with invariant distances.

Ozan Erdo?an; George Sterman

2015-01-29T23:59:59.000Z

89

3D N = 4 Gauge Theory Compactication  

E-Print Network (OSTI)

Outline 3D N = 4 Gauge Theory Compactication Twistors 3D N = 4 Supersymmetric Gauge Theories and Hyperk¨ahler Metrics Richard Eager UCSB Friday, October 17th, 2008, 4:00 p.m. Richard Eager UCSB 3D N = 4 Supersymmetric Gauge Theories and Hyperk¨ahler M #12;Outline 3D N = 4 Gauge Theory Compactication Twistors

Bigelow, Stephen

90

The urban perspectives of acid rain. Workshop summary  

SciTech Connect

This report documents discussions held during a workshop an Urban Perspective of Acid Rain. The workshop was sponsored by the Office of the Director, National Acid Precipitation Assessment Program (NAPAP). NAPAP anticipates giving increased emphasis to the benefits in urban areas of emissions reductions. The goal of this informal, exploratory workshop was to serve as a first step towards identifying pollutant monitoring, and research and assessment needs to help answer, from an urban perspective, the two key questions posed to NAPAP by Congress: (1) what are the costs, benefits, and effectiveness of the acid rain control program, and (2) what reductions in deposition, rates are needed in order to prevent adverse effects? The workshop addressed research activities needed to respond to these questions. The discussions focused. sequentially, on data needs, data and model availability, and data and modeling gaps. The discussions concentrated on four areas of effects: human health, materials, urban forests, and visibility.

Tonn, B.E.

1993-06-04T23:59:59.000Z

91

Translational groups as generators of gauge transformations  

Science Journals Connector (OSTI)

We examine the gauge generating nature of the translational subgroup of Wigner’s little group for the case of massless tensor gauge theories and show that the gauge transformations generated by the translational group are only a subset of the complete set of gauge transformations. We also show that, just as in the case of topologically massive gauge theories, translational groups act as generators of gauge transformations in gauge theories obtained by extending massive gauge noninvariant theories by a Stückelberg mechanism. The representations of the translational groups that generate gauge transformations in such Stückelberg extended theories can be obtained by the method of dimensional descent. We illustrate these results with the examples of Stückelberg extended first class versions of Proca, Einstein-Pauli-Fierz, and massive Kalb-Ramond theories in 3+1 dimensions. A detailed analysis of the partial gauge generation in massive and massless second rank symmetric gauge theories is provided. The gauge transformations generated by the translational group in two-form gauge theories are shown to explicitly manifest the reducibility of gauge transformations in these theories.

Tomy Scaria

2003-11-26T23:59:59.000Z

92

Optical Abelian Lattice Gauge Theories  

E-Print Network (OSTI)

We discuss a general framework for the realization of a family of abelian lattice gauge theories, i.e., link models or gauge magnets, in optical lattices. We analyze the properties of these models that make them suitable to quantum simulations. Within this class, we study in detail the phases of a U(1)-invariant lattice gauge theory in 2+1 dimensions originally proposed by Orland. By using exact diagonalization, we extract the low-energy states for small lattices, up to 4x4. We confirm that the model has two phases, with the confined entangled one characterized by strings wrapping around the whole lattice. We explain how to study larger lattices by using either tensor network techniques or digital quantum simulations with Rydberg atoms loaded in optical lattices where we discuss in detail a protocol for the preparation of the ground state. We also comment on the relation between standard compact U(1) LGT and the model considered.

L. Tagliacozzo; A. Celi; A. Zamora; M. Lewenstein

2013-02-07T23:59:59.000Z

93

Is CP a Gauge Symmetry?  

E-Print Network (OSTI)

We suggest here that CP is a discrete {\\it gauge} symmetry, and is therefore not violated by quantum gravity. We show that four dimensional CP can arise as a discrete gauge symmetry in theories with dimensional compactification, if the original number of Minkowski dimensions equals $8k+1$, $8k+2$ or $8k+3$, and if there are certain restrictions on the gauge group; these conditions are met by superstrings. CP may then be broken spontaneously below $10^9$ GeV, explaining the observed CP violation in the kaon system without inducing a large EDMN. We discuss the phenomenology of such models, as well as the peculiar nature of cosmic ``CP strings'' which could be produced at the compactification scale. Such strings have the curious property that a particle carried around the string is turned into its CP conjugate. A single CP string renders four dimensional spacetime nonorientable.

Kiwoon Choi; David B. Kaplan; Ann E. Nelson

1992-05-04T23:59:59.000Z

94

Decrypting gauge-Yukawa cookbooks  

E-Print Network (OSTI)

For many years, theorists have calculated formulas for useful quantities in general gauge-Yukawa theories. However, these cookbooks are often very difficult to use since the general notation is far removed from practical model building. In this paper, we present the structure delta which allows us to use a surprisingly convenient notation that bridges the gap between general gauge-Yukawa theories and specific models. This is particularly useful for the computation of beta functions, but can also be extended to handle spontaneous symmetry breaking, the effective potential and a variety of other quantities. We will introduce it using the standard model of particle physics and a toy model with an SU(N_c) gauge symmetry.

Esben Mølgaard

2014-04-22T23:59:59.000Z

95

A Dynamic GIS–Multicriteria Technique for Siting the NASA–Clark Atlanta Urban Rain Gauge Network  

Science Journals Connector (OSTI)

Because Atlanta, Georgia, is a model of rapid transition from forest/agriculture land use to urbanization, NASA and other agencies have initiated programs to identify and understand how urban heat islands (UHIs) impact the environment in terms of ...

J. Marshall Shepherd; Olayiwola O. Taylor; Carlos Garza

2004-09-01T23:59:59.000Z

96

Multi-step contrast sensitivity gauge  

DOE Patents (OSTI)

An X-ray contrast sensitivity gauge is described herein. The contrast sensitivity gauge comprises a plurality of steps of varying thicknesses. Each step in the gauge includes a plurality of recesses of differing depths, wherein the depths are a function of the thickness of their respective step. An X-ray image of the gauge is analyzed to determine a contrast-to-noise ratio of a detector employed to generate the image.

Quintana, Enrico C; Thompson, Kyle R; Moore, David G; Heister, Jack D; Poland, Richard W; Ellegood, John P; Hodges, George K; Prindville, James E

2014-10-14T23:59:59.000Z

97

Surveying the Phenomenology of General Gauge Mediation  

E-Print Network (OSTI)

I explore the phenomenology, constraints and tuning for several weakly coupled implementations of multi-parameter gauge mediation and compare to minimal gauge mediation. The low energy spectra are distinct from that of minimal gauge mediation, a wide range of NLSPs is found and spectra are significantly compressed thus tunings may be generically reduced to a part in 10 to a part in 20.

Linda M. Carpenter

2008-12-11T23:59:59.000Z

98

Supersymmetric Gauge Theories in 3d  

E-Print Network (OSTI)

Supersymmetric Gauge Theories in 3d Nathan Seiberg IAS #12;The Search for Fundamental Physics Dine. 8 #12;Supersymmetric Gauge Theories in 3d Nathan Seiberg IAS Based on work with Aharony, Intriligator, Razamat, and Willett, to appear #12;3d SUSY Gauge Theories · New lessons about dynamics

California at Santa Cruz, University of

99

Non-Abelian Gauge Fields. Commutation Relations  

Science Journals Connector (OSTI)

The question is raised for non-Abelian vector gauge fields whether gauge invariance necessarily implies a massless physical particle. As a preliminary to studying this problem, the action principle is used to discover the independent dynamical variables of such gauge fields and construct their commutation relations.

Julian Schwinger

1962-02-01T23:59:59.000Z

100

E-Print Network 3.0 - asian tropical rain Sample Search Results  

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

out that in the case of tropical cyclones or warm rain, substantial amounts... the flash density. CG-lightning and precipitation data are used to compute the values ......

Note: This page contains sample records for the topic "bucket rain gauge" 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

E-Print Network 3.0 - atlantic rain forest Sample Search Results  

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

. 2006. Biased seed rain in forest edges: Evidence from the Brazilian Atlantic forest. Biol. Conserv. 132... forest typical for eastern lowland Borneo (Slik et al. 2009). The...

102

E-Print Network 3.0 - alluvial atlantic rain Sample Search Results  

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

types of lowland tropical rain forest: alluvial, sandstone hill... , and kerangas (heath) forest. Alluvial soils are more nutrient rich and have higher soil moisture than...

103

Gauge Configurations for Lattice QCD from The Gauge Connection  

DOE Data Explorer (OSTI)

The Gauge Connection is an experimental archive for lattice QCD and a repository of gauge configurations made freely available to the community. Contributors to the archive include the Columbia QCDSP collaboration, the MILC collaboration, and others. Configurations are stored in QCD archive format, consisting of an ASCII header which defines various parameters, followed by binary data. NERSC has also provided some utilities and examples that will aid users in handling the data. Users may browse the archive, but are required to register for a password in order to download data. Contents of the archive are organized under four broad headings: Quenched (more than 1200 configurations); Dynamical, Zero Temperature (more than 300 configurations); MILC Improved Staggered Asqtad Lattices (more than 7000 configurations); and Dynamical, Finite Temperature (more than 1200 configurations)

104

Radiation characterization summary : ACRR 44-inch lead-boron bucket located in the central cavity on the 32-inch pedestal at the core centerline (ACRR-LB44-CC-32-cl).  

SciTech Connect

This document presents the facility-recommended characterization of the neutron, prompt gamma-ray, and delayed gamma-ray radiation fields in the Annular Core Research Reactor (ACRR) for the 44-inch-long lead-boron bucket in the central cavity on the 32-inch pedestal at the core centerline. The designation for this environment is ACRR-LB44-CC-32-cl. The neutron, prompt gamma-ray, and delayed gamma-ray energy spectra are presented as well as radial and axial neutron and gamma-ray flux profiles within the experiment area of the bucket. Recommended constants are given to facilitate the conversion of various dosimetry readings into radiation metrics desired by experimenters. Representative pulse and steady-state operations are presented with conversion examples.

Parma, Edward J.,; Quirk, Thomas J.; Lippert, Lance L.; Griffin, Patrick Joseph; Naranjo, Gerald E.; Luker, Spencer Michael

2013-04-01T23:59:59.000Z

105

Gauge Transformations as Spacetime Symmetries  

SciTech Connect

Weinberg has shown that massless fields of helicity {+-}1(vector fields) do not transform homogeneously under Unitary Lorentz Transformations (LT). We calculate explicitly the inhomogeneous term. We show that imposing strict invariance of the Lagrangian under LT for an iteracting Dirac field requires the fermion field to transform with a space-time (and photon creation and annihilation operators) dependent phase and dictates the interaction terms as those arising from the conventional gauge principle.

Angeles, Rene; Napsuciale, Mauro [Division de Ciencias e Ingenierias, Universidad de Guanajuato, Lomas del Bosque 103, Fraccionamiento Lomas del Campestre, Leon Guanajuato, 37150 (Mexico)

2009-04-20T23:59:59.000Z

106

Asymptotically Free Gauge Theories. I  

DOE R&D Accomplishments (OSTI)

Asymptotically free gauge theories of the strong interactions are constructed and analyzed. The reasons for doing this are recounted, including a review of renormalization group techniques and their application to scaling phenomena. The renormalization group equations are derived for Yang-Mills theories. The parameters that enter into the equations are calculated to lowest order and it is shown that these theories are asymptotically free. More specifically the effective coupling constant, which determines the ultraviolet behavior of the theory, vanishes for large space-like momenta. Fermions are incorporated and the construction of realistic models is discussed. We propose that the strong interactions be mediated by a "color" gauge group which commutes with SU(3)xSU(3). The problem of symmetry breaking is discussed. It appears likely that this would have a dynamical origin. It is suggested that the gauge symmetry might not be broken, and that the severe infrared singularities prevent the occurrence of non-color singlet physical states. The deep inelastic structure functions, as well as the electron position total annihilation cross section are analyzed. Scaling obtains up to calculable logarithmic corrections, and the naive lightcone or parton model results follow. The problems of incorporating scalar mesons and breaking the symmetry by the Higgs mechanism are explained in detail.

Wilczek, Frank; Gross, David J.

1973-07-00T23:59:59.000Z

107

Simultaneous Retreival of Surface Wind Speed and Rain Rate using Radar and Radiometer Measurements  

E-Print Network (OSTI)

to simultaneously retrieve the vertical profile of precipitation and the near-surface wind speed. ResultsSimultaneous Retreival of Surface Wind Speed and Rain Rate using Radar and Radiometer Measurements simultaneously estimates the over ocean near-surface wind speed and rain rate profile using data from a 10.7 GHz

Ruf, Christopher

108

On the infiltration of rain water through the soil with runo# of the excess water  

E-Print Network (OSTI)

On the infiltration of rain water through the soil with runo# of the excess water Iacopo Borsi '' Viale Morgagni 67/A, 50134 Firenze, Italy Abstract This paper deals with the modelling of the rain water infiltration through the soil above the aquifer in case of runo# of the excess water. The main feature

Fasano, Antonio

109

Smith, Higgin, and Raines Supplementary Data Site-specific folate conjugation to a cytotoxic protein  

E-Print Network (OSTI)

Smith, Higgin, and Raines Supplementary Data ­S1­ Site-specific folate conjugation to a cytotoxic protein Bryan D. Smith, Joshua J. Higgin, and Ronald T. Raines* Page Contents DNA Synthesis S4 References and Notes S5 1 H NMR Spectrum of Folate Analogue 1 #12;Smith, Higgin

Raines, Ronald T.

110

RAIN AND WIND ESTIMATION FROM SEAWINDS IN HURRICANES AT ULTRA HIGH RESOLUTION  

E-Print Network (OSTI)

function (GMF) which relates wind to backscatter (0 ) is not well understood for extremely high wind speedsRAIN AND WIND ESTIMATION FROM SEAWINDS IN HURRICANES AT ULTRA HIGH RESOLUTION Brent A. Williams method for estimating wind and rain in hurricanes from SeaWinds at ultra-high resolution is developed. We

Long, David G.

111

Energy technology and emissions control for acid rain abatement in Asia  

SciTech Connect

After more than ten years of research, acid rain is a sufficiently serious problem in North America to warrant control action. The acid rain problem has become a threat to the Asian continent as well. Emissions of sulfur dioxide and nitrogen oxides are already high and announces plans for increases in coal use by countries in the region imply a major increase in emissions in the future. This will inevitably lead to greater incidence of acid rain and probably significant environmental damage in some locations. The purpose of this paper is to examine some of the issues relating to acid-rain-control technology in Asia and to suggest ways to include technology options in integrated simulation models of acid rain in Asia. 14 refs., 9 figs., 6 tabs. (FL)

Streets, D.G.

1990-01-01T23:59:59.000Z

112

Data Report: Meteorological and Evapotranspiration Data from Sagebrush and Pinyon Pine/Juniper Communities at Pahute Mesa, Nevada National Security Site, 2011-2012  

SciTech Connect

Pahute Mesa is a groundwater recharge area at the Nevada National Security Site. Because underground nuclear testing was conducted at Pahute Mesa, groundwater recharge may transport radionuclides from underground test sites downward to the water table; the amount of groundwater recharge is also an important component of contaminant transport models. To estimate the amount of groundwater recharge at Pahute Mesa, an INFIL3.0 recharge-runoff model is being developed. Two eddy covariance (EC) stations were installed on Pahute Mesa to estimate evapotranspiration (ET) to support the groundwater recharge modeling project. This data report describes the methods that were used to estimate ET and collect meteorological data. Evapotranspiration was estimated for two predominant plant communities on Pahute Mesa; one site was located in a sagebrush plant community, the other site in a pinyon pine/juniper community. Annual ET was estimated to be 310±13.9 mm for the sagebrush site and 347±15.9 mm for the pinyon pine/juniper site (March 26, 2011 to March 26, 2012). Annual precipitation measured with unheated tipping bucket rain gauges was 179 mm at the sagebrush site and 159 mm at the pinyon pine/juniper site. Annual precipitation measured with bulk precipitation gauges was 222 mm at the sagebrush site and 227 mm at the pinyon pine/juniper site (March 21, 2011 to March 28, 2012). A comparison of tipping bucket versus bulk precipitation data showed that total precipitation measured by the tipping bucket rain gauges was 17 to 20 percent lower than the bulk precipitation gauges. These differences were most likely the result of the unheated tipping bucket precipitation gauges not measuring frozen precipitation as accurately as the bulk precipitation gauges. In this one-year study, ET exceeded precipitation at both study sites because estimates of ET included precipitation that fell during the winter of 2010-2011 prior to EC instrumentation and the precipitation gauges started collecting data in March 2011.

Jasoni, Richard L [DRI; Larsen, Jessica D [DRI; Lyles, Brad F. [DRI; Healey, John M [DRI; Cooper, Clay A [DRI; Hershey, Ronald L [DRI; Lefebre, Karen J [DRI

2013-04-01T23:59:59.000Z

113

On the Differences in Storm Rainfall from Hurricanes Isidore and Lili. Part I: Satellite Observations and Rain Potential  

E-Print Network (OSTI)

Observations and Rain Potential HAIYAN JIANG AND JEFFREY B. HALVERSON Joint Center for Earth Systems Technology 2007) ABSTRACT It has been well known for years that the heavy rain and flooding of tropical cyclones's potential for inland flooding 3­4 days in advance of landfall. 1. Introduction The combination of rain

Jiang, Haiyan

114

Maps between Deformed and Ordinary Gauge Fields  

E-Print Network (OSTI)

In this paper, we introduce a map between the q-deformed gauge fields defined on the GL$_{q}(N) $-covariant quantum hyperplane and the ordinary gauge fields. Perturbative analysis of the q-deformed QED at the classical level is presented and gauge fixing $\\grave{a} $ la BRST is discussed. An other star product defined on the hybrid $(q,h) $% -plane is explicitly constructed .

L. Mesref

2005-04-13T23:59:59.000Z

115

Probing anomalous gauge boson couplings at LEP  

SciTech Connect

We bound anomalous gauge boson couplings using LEP data for the Z {yields} {bar {integral}}{integral} partial widths. We use an effective field theory formalism to compute the one-loop corrections resulting from non-standard model three and four gauge boson vertices. We find that measurements at LEP constrain the three gauge boson couplings at a level comparable to that obtainable at LEPII.

Dawson, S. [Brookhaven National Lab., Upton, NY (United States); Valencia, G. [Iowa State Univ., Ames, IA (United States). Dept. of Physics

1994-12-31T23:59:59.000Z

116

Renormalizability of a generalized gauge fixing interpolating among the Coulomb, Landau and maximal Abelian gauges  

SciTech Connect

A detailed discussion of the renormalization properties of a class of gauges which interpolates among the Landau, Coulomb and maximal Abelian gauges is provided in the framework of the algebraic renormalization in Euclidean Yang-Mills theories in four dimensions.

Capri, M.A.L. [Departamento de Fisica Teorica, Instituto de Fisica, UERJ, Universidade do Estado do Rio de Janeiro, Rua Sao Francisco Xavier 524, 20550-013 Maracana, Rio de Janeiro (Brazil)]. E-mail: marcio@dft.if.uerj.br; Sobreiro, R.F. [Departamento de Fisica Teorica, Instituto de Fisica, UERJ, Universidade do Estado do Rio de Janeiro, Rua Sao Francisco Xavier 524, 20550-013 Maracana, Rio de Janeiro (Brazil)]. E-mail: sobreiro@uerj.br; Sorella, S.P. [Departamento de Fisica Teorica, Instituto de Fisica, UERJ, Universidade do Estado do Rio de Janeiro, Rua Sao Francisco Xavier 524, 20550-013 Maracana, Rio de Janeiro (Brazil)]. E-mail: sorella@uerj.br; Thibes, R. [Departamento de Fisica Teorica, Instituto de Fisica, UERJ, Universidade do Estado do Rio de Janeiro, Rua Sao Francisco Xavier 524, 20550-013 Maracana, Rio de Janeiro (Brazil)]. E-mail: thibes@dft.if.uerj.br

2007-08-15T23:59:59.000Z

117

Local gauge invariance of free fields  

E-Print Network (OSTI)

It is noted that, in contrast to widespread believes, free fields do not only allow for global, but also for local gauge invariance.

Bernd A. Berg

2012-06-06T23:59:59.000Z

118

Extended gauge invariance and electroweak interactions  

E-Print Network (OSTI)

Gauge invariance is extended to allow to allow for a U(1)-SU(2) mixing term, which can cause a SU(2) deconfining transition.

Bernd A. Berg

2009-10-25T23:59:59.000Z

119

The Gribov Ambiguity for Maximal Abelian and Center Gauges in SU(2) Lattice Gauge Theory  

E-Print Network (OSTI)

We present results for the fundamental string tension in SU(2) lattice gauge theory after projection to maximal abelian and direct maximal center gauges. We generate 20 Gribov copies/configuration. Abelian and center projected string tensions slowly decrease as higher values of the gauge functionals are reached.

John D. Stack; William W. Tucker

2000-11-06T23:59:59.000Z

120

A little rain doesn't fix it: Farmers and ranchers remain cautious as drought continues  

E-Print Network (OSTI)

A little rain doesn?t fix it Farmers and ranchers remain cautious as drought continues Summer 2012 tx H2O 11 ] Story by Danielle Kalisek Rains in the Brazos Valley early in 2012 helped this grass green up, but more rains are needed now... have helped ease the pressure, farmers and ranchers remain cautious, remembering the pain of last year as they prepare for the future. ?If you look at what the climatologists are saying, the La Ni?a event expired around the end of April, and we...

Kalisek, Danielle

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

Analysis of TRMM Precipitation Radar Algorithms and Rain over the Tropics and Southeast Texas  

E-Print Network (OSTI)

sensitivity of the heating distribution to the stratiform rain fraction. The TRMM PR has two main algorithms to determine rain type and rain totals. The so-called 2A23 algorithm classifies radar profiles as stratiform or convective, while the so- called 2A... meters apart from 20 km down to near the surface, the latter of which can be used to estimate rainfall at the surface for regions across the tropics and portions of the mid-latitudes. The data collected by the PR is processed using a hierarchy...

Funk, Aaron

2013-12-10T23:59:59.000Z

122

Boson stars from a gauge condensate  

E-Print Network (OSTI)

The boson star filled with two interacting scalar fields is investigated. The scalar fields can be considered as a gauge condensate formed by SU(3) gauge field quantized in a non-perturbative manner. The corresponding solution is regular everywhere, has a finite energy and can be considered as a quantum SU(3) version of the Bartnik - McKinnon particle-like solution.

V. Dzhunushaliev; K. Myrzakulov; R. Myrzakulov

2006-12-28T23:59:59.000Z

123

Non-Abelian Gauge Fields. Relativistic Invariance  

Science Journals Connector (OSTI)

A simple criterion for Lorentz invariance in quantum field theory is stated as a commutator condition relating the energy density to the momentum density. With its aid a relativistically invariant radiation-gauge formulation is devised for a non-Abelian vector-gauge field coupled to a spin-½ Fermi field.

Julian Schwinger

1962-07-01T23:59:59.000Z

124

Can (Electric-Magnetic) Duality Be Gauged?  

E-Print Network (OSTI)

There exists a formulation of the Maxwell theory in terms of two vector potentials, one electric and one magnetic. The action is then manifestly invariant under electric-magnetic duality transformations, which are rotations in the two-dimensional internal space of the two potentials, and local. We ask the question: can duality be gauged? The only known and battled-tested method of accomplishing the gauging is the Noether procedure. In its decanted form, it amounts to turn on the coupling by deforming the abelian gauge group of the free theory, out of whose curvatures the action is built, into a non-abelian group which becomes the gauge group of the resulting theory. In this article, we show that the method cannot be successfully implemented for electric-magnetic duality. We thus conclude that, unless a radically new idea is introduced, electric-magnetic duality cannot be gauged. The implication of this result for supergravity is briefly discussed.

Claudio Bunster; Marc Henneaux

2014-03-13T23:59:59.000Z

125

Gauging the cosmic microwave background  

E-Print Network (OSTI)

We provide a new derivation of the anisotropies of the cosmic microwave background (CMB), and find an exact expression that can be readily expanded perturbatively. Close attention is paid to gauge issues, with the motivation to examine the effect of super-Hubble modes on the CMB. We calculate a transfer function that encodes the behaviour of the dipole, and examine its long-wavelength behaviour. We show that contributions to the dipole from adiabatic super-Hubble modes are strongly suppressed, even in the presence of a cosmological constant, contrary to claims in the literature. We also introduce a naturally defined CMB monopole, which exhibits closely analogous long-wavelength behaviour. We discuss the geometrical origin of this super-Hubble suppression, pointing out that it is a simple reflection of adiabaticity, and hence argue that it will occur regardless of the matter content.

J. P. Zibin; Douglas Scott

2008-12-21T23:59:59.000Z

126

Thread gauge for tapered threads  

DOE Patents (OSTI)

The thread gauge permits the user to determine the pitch diameter of tapered threads at the intersection of the pitch cone and the end face of the object being measured. A pair of opposed anvils having lines of threads which match the configuration and taper of the threads on the part being measured are brought into meshing engagement with the threads on opposite sides of the part. The anvils are located linearly into their proper positions by stop fingers on the anvils that are brought into abutting engagement with the end face of the part. This places predetermined reference points of the pitch cone of the thread anvils in registration with corresponding points on the end face of the part being measured, resulting in an accurate determination of the pitch diameter at that location. The thread anvils can be arranged for measuring either internal or external threads. 13 figures.

Brewster, A.L.

1994-01-11T23:59:59.000Z

127

Thread gauge for tapered threads  

DOE Patents (OSTI)

The thread gauge permits the user to determine the pitch diameter of tapered threads at the intersection of the pitch cone and the end face of the object being measured. A pair of opposed anvils having lines of threads which match the configuration and taper of the threads on the part being measured are brought into meshing engagement with the threads on opposite sides of the part. The anvils are located linearly into their proper positions by stop fingers on the anvils that are brought into abutting engagement with the end face of the part. This places predetermined reference points of the pitch cone of the thread anvils in registration with corresponding points on the end face of the part being measured, resulting in an accurate determination of the pitch diameter at that location. The thread anvils can be arranged for measuring either internal or external threads.

Brewster, Albert L. (R.R. #2, Box 264, Pleasant Hill, MO 64080)

1994-01-11T23:59:59.000Z

128

Food resources of the rain forest by Claude Marcel HLADJK and Annette HLAD!K  

E-Print Network (OSTI)

certainly present in the African rain forest long before humankind, provide large starchy tubers. In order the mostcommon wild yamsofthe forest, Dioscorea burldlliana, has globular tubers localed at the end of narrow

Paris-Sud XI, Université de

129

Global CO2 emissions trading: Early lessons from the U.S. acid rain program  

Science Journals Connector (OSTI)

The U.S. Environmental Protection Agency is implementing a program of SO2 emission allowance trading as part of the Acid Rain Program authorized by the Clean Air Act Amendments of 1990. Electric utilities may use...

Barry D. Solomon

1995-05-01T23:59:59.000Z

130

Effects of Rain Rate and Wind Magnitude on SeaWinds Scatterometer Wind Speed Errors  

Science Journals Connector (OSTI)

Rain within the footprint of the SeaWinds scatterometer on the QuikSCAT satellite causes more significant errors than existed with its predecessor, the NASA scatterometer (NSCAT) on Advanced Earth Observing Satellite-I (ADEOS-I). Empirical ...

David E. Weissman; Mark A. Bourassa; Jeffrey Tongue

2002-05-01T23:59:59.000Z

131

E-Print Network 3.0 - african equatorial rain Sample Search Results  

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

22352255 doi: 10.1256qj.05.121 Stratiform precipitation production over sub-Saharan Africa and the tropical Summary: , resulting in less stratiform rain. Strong upper-level...

132

Air and rain toxics deposition monitoring in Galveston Bay Texas  

SciTech Connect

In order to fulfill the mandates of the Great Waters Program and portions of the Clean Air Act Amendments of 1990, the Environmental Protection Agency (EPA) has initiated atmospheric monitoring research in important and representative water bodies, including coastal waters, for evidence of atmospheric deposition of pollutants. These pollutants include nutrients, trace metals, polynuclear aromatic hydrocarbons and PCBs. A site was established in Seabrook Texas on the western shore of Galveston Bay representative of southern, coastal water system. This study determines selected environmental pollutants of potential concern to Galveston Bay and other Gulf coastal waters. While information is currently being generated by other investigations in Galveston Bay, such as EPA EMAP, Galveston Bay National Estuary, NOAA Status and Trends and other programs on contaminants in sediments and organisms, little reliable data is available to assess atmospheric deposition. The importance of atmospheric deposition of contaminants to Galveston Bay, based on air and rain samples collected continuously from March 1995 to March 1996 will be presented and compared to the results from other Great Waters Program sites. These results are critical to the understanding of the relative importance of various contaminant inputs to Galveston Bay by estimating atmospheric depositional fluxes.

Wade, T.; Sweet, S.; Park, J.; Cifuentes, L.; Tindale, N.; Santschi, P.; Gill, G. [Texas A and M Univ., College Station, TX (United States). Coll. of Geosciences and Maritime Studies

1995-12-31T23:59:59.000Z

133

Integrated Title V/acid rain permits: Transitioning through initial permit issuance and reopenings  

SciTech Connect

Titles IV and V of the Clean Air Act Amendments of 1990 (Act or CAA) created two new stationary source permitting programs, one specific to acid rain (Title IV), and a second for operating permits in general (Title V). The Phase 2 portion of the acid rain program was designed to be implemented through the Title V operating permit program, thereby subjecting all Phase 2 acid rain sources to the requirements of Title V. Permits issued pursuant to Phase 2 of the acid rain program will be viewed as a self-contained portion of the Title V operating permit and will be governed by regulations promulgated under both Title IV and Title V. The requirements imposed by Title IV may not always be consistent with the broader operating permit program requirements of Title V, and when inconsistency occurs, the acid rain requirements will take precedence. This nonalignment will perhaps be most apparent during two stages of initial permitting: (1) the transition period following Title V program approval when permit application, issuance, and effective dates differ between the two programs, and (2) at the point when acid rain permits must be reopened to incorporate Phase 2 NO{sub x} requirements. This paper explores strategies for streamlining implementation of the two programs with particular focus on these two coordination issues.

Bloomfield, C. [Environmental Protection Agency, San Francisco, CA (United States)

1995-12-31T23:59:59.000Z

134

Perturbative Unitarity Constraints on Gauge Portals  

E-Print Network (OSTI)

Dark matter that was once in thermal equilibrium with the Standard Model is generally prohibited from obtaining all of its mass from the electroweak phase transition. This implies a new scale of physics and mediator particles to facilitate dark matter annihilation. In this work, we focus on dark matter that annihilates through a generic gauge boson portal. We show how partial wave unitarity places upper bounds on the dark gauge boson, dark Higgs and dark matter masses. Outside of well-defined fine-tuned regions, we find an upper bound of 9 TeV for the dark matter mass when the dark Higgs and dark gauge bosons both facilitate the dark matter annihilations. In this scenario, the upper bound on the dark Higgs and dark gauge boson masses are 10 TeV and 16 TeV, respectively. When only the dark gauge boson facilitates dark matter annihilations, we find an upper bound of 3 TeV and 6 TeV for the dark matter and dark gauge boson, respectively. Overall, using the gauge portal as a template, we describe a method to not only place upper bounds on the dark matter mass but also on the new particles with Standard Model quantum numbers. We briefly discuss the reach of future accelerator, direct and indirect detection experiments for this class of models.

Sonia El Hedri; William Shepherd; Devin G. E. Walker

2014-12-17T23:59:59.000Z

135

Dynamical variables in Gauge-Translational Gravity  

E-Print Network (OSTI)

Assuming that the natural gauge group of gravity is given by the group of isometries of a given space, for a maximally symmetric space we derive a model in which gravity is essentially a gauge theory of translations. Starting from first principles we verify that a nonlinear realization of the symmetry provides the general structure of this gauge theory, leading to a simple choice of dynamical variables of the gravity field corresponding, at first order, to a diagonal matrix, whereas the non-diagonal elements contribute only to higher orders.

J. Julve; A. Tiemblo

2010-07-02T23:59:59.000Z

136

Poincaré Gauge Theories for Lineal Garvity  

E-Print Network (OSTI)

We have shown that two of the most studied models of lineal gravities - Liouville gravity and a ``string-inspired'' model exhibiting the main characteristic features of a black-hole solution - can be formulated as gauge invariant theories of the Poincar\\'e group. The gauge invariant couplings to matter (particles, scalar and spinor fields) and explicit solutions for some matter field configurations, are provided. It is shown that both the models, as well as the couplings to matter, can be obtained as suitable dimensional reductions of a 2+1-dimensional ISO(2,1) gauge invariant theory.

G. Grignani; G. Nardelli

1992-09-30T23:59:59.000Z

137

The Confinement Problem in Lattice Gauge Theory  

SciTech Connect

I review investigations of the quark confinement mechanism that have been carried out in the framework of SU(N) lattice gauge theory. The special role of Z(N) center symmetry is emphasized.

Greensite, J.

2003-03-05T23:59:59.000Z

138

Higher-Spin Gauge Fields and Duality  

E-Print Network (OSTI)

We review the construction of free gauge theories for gauge fields in arbitrary representations of the Lorentz group in $D$ dimensions. We describe the multi-form calculus which gives the natural geometric framework for these theories. We also discuss duality transformations that give different field theory representations of the same physical degrees of freedom, and discuss the example of gravity in $D$ dimensions and its dual realisations in detail.

D. Francia; C. M. Hull

2005-02-24T23:59:59.000Z

139

New Mechanisms of Gauge-Mediated Supersymmetry Breaking  

E-Print Network (OSTI)

We review the motivation for Gauge-Mediated Supersymmetry Breaking and discuss some recent advances.

Lisa Randall

1997-06-23T23:59:59.000Z

140

Photo of the Week: Rain or Shine, Preparing for the 2013 Hurricane Season |  

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

Rain or Shine, Preparing for the 2013 Hurricane Rain or Shine, Preparing for the 2013 Hurricane Season Photo of the Week: Rain or Shine, Preparing for the 2013 Hurricane Season May 15, 2013 - 1:16pm Addthis President Barack Obama listens to Acting Energy Secretary Daniel B. Poneman during a meeting with electric utility CEOs and trade association representatives at the Department of Energy in Washington, D.C., May 8, 2013. The group met to discuss lessons learned during the response to Hurricane Sandy, as well as the ongoing preparations for 2013 hurricane season, which begins June 1. | Official White House Photo by Pete Souza. President Barack Obama listens to Acting Energy Secretary Daniel B. Poneman during a meeting with electric utility CEOs and trade association representatives at the Department of Energy in Washington, D.C., May 8,

Note: This page contains sample records for the topic "bucket rain gauge" 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

Watch Out for the Snakes! 21 Biologists and one Physicist in a Rain Forest  

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

Watch Out for the Snakes! 21 Biologists and one Physicist in a Rain Forest Watch Out for the Snakes! 21 Biologists and one Physicist in a Rain Forest in Nicaragua Speaker(s): Donald Grether Date: June 29, 2007 - 12:00pm Location: 90-3122 Don, his wife Becky, and their granddaughter Briana recently returned from spending almost three weeks at a field station in a rain forest in Nicaragua, along with UCLA faculty members, graduate students, and undergraduates. Our location was way off the beaten track, even for "eco-tourists", and could only be reached by a three-hour boat trip on Rio San Juan. No hot water or space heating or cooling, running water most but not all of the time, no electricity in our rooms, no windows, and no Internet. Sort of like a near-zero energy building. Don's presentation will include photos that give some sense of why we went, what it took to

142

Acid rain program: CEMS submission instructions for monitoring plans, certification test notifications, and quarterly reports  

SciTech Connect

The Acid Rain Program regulations require all affected utility units to continuously measure, record and report SO2, NOx, volumetric flow data and CO2 emissions. All affected units also must continuously measure and record opacity, and must report opacity exceedances to the appropriate State or Local Agency. To ensure that your CEMS and fuel flowmeters are performing at an acceptable level, and providing quality assured data, you are required under 40 CFR 75.53, 75.62 (a) to submit a monitoring plan and certification test data for acid rain CEM certificaton. The purpose of this handbook is to help you fulfill your requirements under the Acid Rain Program. This handbook will walk you through the necessary steps for gaining CEMS certification, including filling out and mailing the proper forms, administering the required tests, and applying for certification and sending in electronic data to EPA.

NONE

1995-05-12T23:59:59.000Z

143

Gauge Theories of Josephson Junction Arrays  

E-Print Network (OSTI)

We show that the zero-temperature physics of planar Josephson junction arrays in the self-dual approximation is governed by an Abelian gauge theory with periodic mixed Chern-Simons term describing the charge-vortex coupling. The periodicity requires the existence of (Euclidean) topological excitations which determine the quantum phase structure of the model. The electric-magnetic duality leads to a quantum phase transition between a superconductor and a superinsulator at the self-dual point. We also discuss in this framework the recently proposed quantum Hall phases for charges and vortices in presence of external offset charges and magnetic fluxes: we show how the periodicity of the charge-vortex coupling can lead to transitions to anyon superconductivity phases. We finally generalize our results to three dimensions, where the relevant gauge theory is the so-called BF system, with an antisymmetric Kalb-Ramond gauge field.

M. C. Diamantini; P. Sodano; C. A. Trugenberger

1995-11-23T23:59:59.000Z

144

Bianchi Cosmological Models and Gauge Symmetries  

E-Print Network (OSTI)

We analyze carefully the problem of gauge symmetries for Bianchi models, from both the geometrical and dynamical points of view. Some of the geometrical definitions of gauge symmetries (=``homogeneity preserving diffeomorphisms'') given in the literature do not incorporate the crucial feature that local gauge transformations should be independent at each point of the manifold of the independent variables ( = time for Bianchi models), i.e, should be arbitrarily localizable ( in time). We give a geometrical definition of homogeneity preserving diffeomorphisms that does not possess this shortcoming. The proposed definition has the futher advantage of coinciding with the dynamical definition based on the invariance of the action ( in Lagrangian or Hamiltonian form). We explicitly verify the equivalence of the Lagrangian covariant phase space with the Hamiltonian reduced phase space. Remarks on the use of the Ashtekar variables in Bianchi models are also given.

Olivier Coussaert; Marc Henneaux

1993-01-05T23:59:59.000Z

145

Undulating strings and gauge theory waves  

Science Journals Connector (OSTI)

We study some dynamical aspects of the correspondence between strings in AdS space and external heavy quarks in N=4 SYM. Specifically, by examining waves propagating on such strings, we make some plausible (and some surprising) inferences about the time-dependent fields produced by oscillating quarks in the strongly coupled gauge theory. We point out a puzzle regarding energy conservation in the SYM theory. In addition, we perform a similar analysis of the gauge fields produced by a baryon (represented as a D5-brane with string-like extension in AdS space) and compare and contrast with the gauge fields produced by a quark–antiquark pair (represented as a string looping through AdS space).

Curtis G. Callan; Jr; Alberto Güijosa

2000-01-01T23:59:59.000Z

146

Dynamic optical properties in graphene: Length versus velocity gauge  

SciTech Connect

The dynamic optical properties of graphene are theoretically investigated in both length gauge and velocity gauge in the presence of ultrafast optical radiation field. The two gauges present different results of dynamic photo-induced carriers and optical conductance due to distinct dependencies on electric field and non-resonant optical absorption, while the two gauges give identical results in the steady state time. It shows that the choice of gauge affects evidently the dynamic optical properties of graphene. The velocity gauge represents an outcome of a real physical experiment.

Dong, H. M.; Han, K., E-mail: han6409@263.net [Department of Physics, China University of Mining and Technology, Xuzhou 221116 (China); Xu, W. [Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China); Department of Physics, Yunnan University, Kunming 650091 (China)

2014-02-14T23:59:59.000Z

147

E-Print Network 3.0 - abelian gauge fields Sample Search Results  

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

Baal, Pierre - Leiden Institute of Physics, Universiteit Leiden Collection: Physics 12 Ising lattice gauge theory and confinement Summary: gauge theory Gauge invariance ...

148

Gravity as a Gauge Theory of Translations  

E-Print Network (OSTI)

The Poincar\\'e group can be interpreted as the group of isometries of a minkowskian space. This point of view suggests to consider the group of isometries of a given space as the suitable group to construct a gauge theory of gravity. We extend these ideas to the case of maximally symmetric spaces to reach a realistic theory including the presence of a cosmological constant. Introducing the concept of "minimal tetrads" we deduce Einstein gravity in the vacuum as a gauge theory of translations.

J. Martin-Martin; A. Tiemblo

2009-07-16T23:59:59.000Z

149

Gauge - Mediated Supersymmetry Breaking in String Compactifications  

SciTech Connect

We provide string theory examples where a toy model of a SUSY GUT or the MSSM is embedded in a compactification along with a gauge sector which dynamically breaks supersymmetry. We argue that by changing microscopic details of the model (such as precise choices of flux), one can arrange for the dominant mediation mechanism transmitting SUSY breaking to the Standard Model to be either gravity mediation or gauge mediation. Systematic improvement of such examples may lead to top-down models incorporating a solution to the SUSY flavor problem.

Diaconescu, Duiliu-Emanuel; /Rutgers U., Piscataway; Florea, Bogdan; Kachru, Shamit; Svrcek, Peter; /Stanford U., Phys. Dept. /SLAC

2006-01-04T23:59:59.000Z

150

Spinning rotor gauge based vacuum gauge calibration system at the Institute for Plasma Research (IPR)  

Science Journals Connector (OSTI)

The Steady-state Superconducting Tokamak (SST-1) is an indigenously built medium sized fusion device at IPR designed for plasma duration of 1000 seconds. It consists of two large vacuum chambers – Vacuum Vessel (16 m3) and Cryostat (39 m3) which will be pumped to UHV and HV pressures respectively using a set of turbo molecular pumps, Cryo-pumps and Roots pumps. The total as well as the partial pressure measurement in these chambers will be carried out using a set of Pirani gauges, Bayard Alpert type gauges, Capacitance manometers and Residual Gas Analyzers (RGA). A reliable and accurate pressure measurement is essential for successful operation of SST-1 machine. For this purpose a gauge calibration system is set up in SST-1 Vacuum laboratory based on Spinning Rotor Gauge which can measure absolute pressure in the range 1.0 mbar to 1.0 ? 10?7 mbar. This system is designed to calibrate up to five gauges simultaneously for different gases in different operating pressure ranges of the gauges. This paper discusses the experimental set-up and the procedure adopted for the calibration of such vacuum gauges.

Pratibha Semwal; Ziauddin Khan; Kalpesh R Dhanani; Firozkhan S Pathan; Siju George; Dilip C Raval; Prashant L Thankey; Yuvakiran Paravastu; Himabindu M

2012-01-01T23:59:59.000Z

151

The Maximal Abelian Gauge, Monopoles, and Vortices in SU(3) Lattice Gauge Theory  

E-Print Network (OSTI)

We report on calculations of the heavy quark potential in SU(3) lattice gauge theory. Full SU(3) results are compared to three cases which involve gauge-fixing and projection. All of these start from the maximal abelian gauge (MAG), in its simplest form. The first case is abelian projection to U(1)xU(1). The second keeps only the abelian fields of monopoles in the MAG. The third involves an additional gauge-fixing to the indirect maximal center gauge (IMCG), followed by center projection to Z(3). At one gauge fixing/configuration, the string tensions calculated from MAG U(1)xU(1), MAG monopoles, and IMCG Z(3) are all less than the full SU(3) string tension. The projected string tensions further decrease, by approximately 10%, when account is taken of gauge ambiguities. Comparison is made with corresponding results for SU(2). It is emphasized that the formulation of the MAG is more subtle for SU(3) than for SU(2), and that the low string tensions may be caused by the simple MAG form used. A generalized MAG for SU(3) is formulated.

John D. Stack; William W. Tucker; Roy J. Wensley

2001-10-25T23:59:59.000Z

152

Validation and Development of Melting Layer Models Using Constraints by Active/Passive Microwave Observations of Rain and the Wind-Roughened  

E-Print Network (OSTI)

Observations of Rain and the Wind-Roughened Ocean Surface SHANNON T. BROWN* AND CHRISTOPHER S. RUF Department

Ruf, Christopher

153

ENJOYING THE RAIN FOREST Nowhere in the world will your eyes observe a greater  

E-Print Network (OSTI)

than what is waiting for you in the rain forest in the Luquillo Mountains. According to ancient Indian and its people. The name Luquillo is derived from this god spirit's Indian name. Many of the sights you Trail PR 9966 To El Verde Km 7.8 Las Cabezas Observation Point Km 8.1 La Coca Falls Access Control Gate

154

AUGUST 2005AMERICAN METEOROLOGICAL SOCIETY | 1069 he Community Collaborative Rain, Hail, and  

E-Print Network (OSTI)

Educa- tion (ISE) program to expand into rural areas of far eastern Colorado, southern Wyoming, western. of rain over a small portion of Fort Collins, Colorado, on 28 July 1997, and a similar storm the following evening over the grasslands of northeastern Colorado. These floods were respon- sible for several

Rutledge, Steven

155

DISDROMETER RAIN DROP STATISTICS FOR DARWIN AND THE SOUTHERN GREAT PLAINS SITE  

E-Print Network (OSTI)

DISDROMETER RAIN DROP STATISTICS FOR DARWIN AND THE SOUTHERN GREAT PLAINS SITE M. J. Bartholomew Associates, LLC under Contract No. DE-AC02- 98CH10886 with the U.S. Department of Energy. The publisher-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript

156

Large-scale experimental wind-driven rain exposure investigations of building integrated photovoltaics  

Science Journals Connector (OSTI)

Building integrated photovoltaics (BIPVs) are photovoltaic materials that replace conventional building materials in parts of the building envelopes, such as roofs or facades, i.e. the BIPV system serves dual purposes, as both a building envelope material and a power generator. Hence, it is important to focus on the building envelope properties of a BIPV system in addition to energy generation performance when conducting experimental investigations of BIPVs. The aim of this work was to illustrate challenges linked to the building envelope properties of a BIPV system, and to develop and evaluate relevant methods for testing the building envelope properties of BIPV systems. A sample roof area with two BIPV modules was built and tested in a turnable box for rain and wind tightness testing of sloping building surfaces with the aim of investigating the rain tightness of the BIPV system, and observing how it withstood wind-driven rain at large-scale conditions. The BIPV sample roof went through testing with run-off water and wind-driven rain with incremental pulsating positive differential pressure over the sample at two different inclinations. The BIPV sample roof was during testing constantly visually monitored, and various leakage points were detected. In order to prevent such water penetration, the steel fittings surrounding the BIPV modules should ideally be better adapted to the BIPV modules and constricted to some extent. It is however important to maintain a sufficient ventilation rate simultaneously.

Christer Breivik; Bjørn Petter Jelle; Berit Time; Øystein Holmberget; John Nygård; Einar Bergheim; Arvid Dalehaug

2013-01-01T23:59:59.000Z

157

Floods are too much water on normally dry land. Rivers can flood after heavy rain  

E-Print Network (OSTI)

count. Flash floods move with lightning speed! Move to higher ground--leave everything and run. A flash heavily, there may be flash floods. Flash floods occur in mountain streams, canyons or dry washes. They also happen on low spots in cities and suburbs. Flash floods can occur even though it's not raining

158

Analysis of the strengths and weaknesses of acid rain electronic data reports  

SciTech Connect

Entergy Corporation is a Phase II utility with a fossil generation base composed primarily of natural gas and low sulfur coal. This paper presents an analysis of a large Phase II utility`s continuous emissions monitoring data reported to EPA under Title IV Acid Rain. Electric utilities currently report hourly emissions of NO{sub x}, SO{sub 2}, CO{sub 2}, fuel use, and generation through electronic data reports to EPA. This paper describes strengths and weaknesses of the data reported to EPA as determined through an analysis of 1995 data. Emissions reported by this company under acid rain for SO{sub 2} and NO{sub x} are very different from emissions reported to state agencies for annual emission inventory purposes in past years and will represent a significant break with historic trends. A comparison of emissions has been made of 1995 emissions reported under Electronic Data Reports to the emissions that would have been reported using emission factors and fuel data in past years. In addition, the paper examines the impacts of 40 CFR Part 75 Acid Rain requirements such as missing data substitution and monitor bias adjustments. Measurement system errors including stack flow measurement and false NO{sub x}Lb/MMBtu readings at very low loads are discussed. This paper describes the implications for public policy, compliance, emissions inventories, and business decisions of Part 75 acid rain monitoring and reporting requirements.

Schott, J. [Entergy Corp., Beaumont, TX (United States)

1997-12-31T23:59:59.000Z

159

With Chest Waders, Hip Boots, Or Rain Gear R. O. Parker Jr.  

E-Print Network (OSTI)

With Chest Waders, Hip Boots, Or Rain Gear R. O. Parker Jr. Neither chest wade rs, hip boots, nor actually be the safe st. If y ou are wearing bulky clothing in addition toyour boots, and do nothing afte r my head, will my waterlogged boots '~ and clothing cause me to sink? If I plunge in head first

160

The time it never rained: How Texas water management has changed because of recurring droughts  

E-Print Network (OSTI)

. I get to thinkin? sometimes that maybe drouth is the normal condition here and the rainy years are the #25;eaks.? Charlie Flagg Chapter #23;#21; #31;e Time It Never Rained, by Elmer Kelton ?#30;e drought of the #23;#22;#21;#24;s was a lot...

Wythe, Kathy

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

VALIDATION OF RAIN RATE RETRIEVALS FROM SEVIRI USING WEATHER RADAR OBSERVATIONS  

E-Print Network (OSTI)

and for improving parameterization cloud processes in numerical weather prediction (NWP) models or assimilation in these models. Although operational networks of Weather Radars are expanding over Europe and the United StatesVALIDATION OF RAIN RATE RETRIEVALS FROM SEVIRI USING WEATHER RADAR OBSERVATIONS R. A. Roebeling

Stoffelen, Ad

162

for Better Homes The effects of loads from wind, snow and rain on houses and other  

E-Print Network (OSTI)

for Better Homes The effects of loads from wind, snow and rain on houses and other light have not been known. Now, however, The Insurance Research Lab for Better Homes, a groundbreaking $7 these questions. What is The Insurance Research Lab for Better Homes? · First-of-its-kind facility that allows

Denham, Graham

163

National Computational Infrastructure for Lattice Gauge Theory  

SciTech Connect

SciDAC-2 Project The Secret Life of Quarks: National Computational Infrastructure for Lattice Gauge Theory, from March 15, 2011 through March 14, 2012. The objective of this project is to construct the software needed to study quantum chromodynamics (QCD), the theory of the strong interactions of sub-atomic physics, and other strongly coupled gauge field theories anticipated to be of importance in the energy regime made accessible by the Large Hadron Collider (LHC). It builds upon the successful efforts of the SciDAC-1 project National Computational Infrastructure for Lattice Gauge Theory, in which a QCD Applications Programming Interface (QCD API) was developed that enables lattice gauge theorists to make effective use of a wide variety of massively parallel computers. This project serves the entire USQCD Collaboration, which consists of nearly all the high energy and nuclear physicists in the United States engaged in the numerical study of QCD and related strongly interacting quantum field theories. All software developed in it is publicly available, and can be downloaded from a link on the USQCD Collaboration web site, or directly from the github repositories with entrance linke http://usqcd-software.github.io

Brower, Richard C.

2014-04-15T23:59:59.000Z

164

ACCELERATION INDUCED SPIN ITS GAUGE GEOMETRY  

E-Print Network (OSTI)

@math.ohio­state.edu ABSTRACT Does there exist a purely quantum mechanical characterization of gravitation? To this end at each event. A unique and natural law of parallel transport of quantum states between different events conclusion that gravitation is to be identified with the gauge geometry of the group [SU(1; 1)] 1 . #12

Gerlach, Ulrich

165

Fourier Accelerated Conjugate Gradient Lattice Gauge Fixing  

E-Print Network (OSTI)

We provide details of the first implementation of a non-linear conjugate gradient method for Landau and Coulomb gauge fixing with Fourier acceleration. We find clear improvement over the Fourier accelerated steepest descent method, with the average time taken for the algorithm to converge to a fixed, high accuracy, being reduced by a factor of 2 to 4.

R. J. Hudspith

2014-05-22T23:59:59.000Z

166

Spontaneous symmetry breaking in gauge theories  

Science Journals Connector (OSTI)

...and beyond the discovery of the Higgs boson. organised and edited by John...and beyond the discovery of the Higgs boson . The aim of this historical article...whose features is the now-famous Higgs boson. symmetry breaking|gauge theory...

2015-01-01T23:59:59.000Z

167

Loop calculus for lattice gauge theories  

Science Journals Connector (OSTI)

Hamiltonian calculations are performed using a loop-labeled basis where the full set of identities for the SU(N) gauge models has been incorporated. The loops are classified as clusterlike structures and the eigenvalue problem leads to a linear set of finite-difference equations easily amenable to numerical treatment. Encouraging results are reported for SU(2) at spatial dimension 2.

Rodolfo Gambini; Lorenzo Leal; Antoni Trias

1989-05-15T23:59:59.000Z

168

From Lattice Gauge Theories to Hydrogen Atoms  

E-Print Network (OSTI)

Using canonical transformations we obtain a complete and most economical realization of the loop or physical Hilbert space of pure $SU(2)_{2+1}$ lattice gauge theory in terms of Wigner coupled Hilbert spaces of hydrogen atoms. One hydrogen atom is assigned to every plaquette of the lattice. The SU(2) gauge theory loop basis states over a plaquette are the bound energy eigenstates $|n l m>$ of the corresponding hydrogen atom. The Wigner couplings of these hydrogen atom energy eigenstates on different plaquettes provide a complete SU(2) gauge theory loop basis on the entire lattice. The loop basis is invariant under simultaneous rotations of all hydrogen atoms. The dual description of this basis diagonalizes all Wilson loop operators and is given in terms of hyperspherical harmonics on the SU(2) group manifold $S^3$. The SU(2) loop dynamics is governed by a "SU(2) spin Hamiltonian" without any gauge fields. The relevance of the hydrogen atom basis and its dynamical symmetry group SO(4,2) in SU(2) loop dynamics in weak coupling continuum limit ($g^2\\rightarrow 0$) is emphasized.

Manu Mathur; T. P. Sreeraj

2014-10-13T23:59:59.000Z

169

Gauge transformations are canonical transformations, redux  

E-Print Network (OSTI)

In this short note we return to the old paper by Tai L. Chow (Eur. J. Phys. 18 (1997), 467-468) and correct its erroneous final part. We also note that the main result of that paper, that gauge transformations of mechanics are canonical transformations, was known much earlier.

Z. K. Silagadze

2014-09-02T23:59:59.000Z

170

Atmospheric deposition of {sup 7}Be by rain events, incentral Argentina  

SciTech Connect

Beryllium-7 is a natural radionuclide that enters into the ecosystems through wet and dry depositions and has numerous environmental applications in terrestrial and aquatic ecosystems. Atmospheric wet deposition of {sup 7}Be was measured in central Argentina. Rain traps were installed (1 m above ground) and individual rain events have been collected. Rain samples were filtered and analyzed by gamma spectrometry. The gamma counting was undertaken using a 40%-efficient p-type coaxial intrinsic high-purity natural germanium crystal built by Princeton Gamma-Tech. The cryostat was made from electroformed high-purity copper using ultralow-background technology. The detector was surrounded by 50 cm of lead bricks to provide shielding against radioactive background. The detector gamma efficiency was determined using a water solution with known amounts of chemical compounds containing long-lived naturally occurring radioisotopes, {sup 176}Lu, {sup 138}La and {sup 40}K. Due to the geometry of the sample and its position close to the detector, the efficiency points from the {sup 176}Lu decay, had to be corrected for summing effects. The measured samples were 400 ml in size and were counted curing one day. The {sup 7}Be detection limit for the present measurements was as low as 0.2 Bq l{sup -1}. Thirty two rain events were sampled and analyzed (November 2006-May 2007). The measured values show that the events corresponding to low rainfall (<20 mm) are characterized by significantly higher activity concentrations (Bq l{sup -1}). The activity concentration of each individual event varied from 0.8 to 3.5 Bq l{sup -1}, while precipitations varied between 4 and 70 mm. The integrated activity by event of {sup 7}Be was fitted with a model that takes into account the precipitation amount and the elapsed time between two rain events. The integrated activities calculated with this model show a good agreement with experimental values.

Ayub, J. Juri; Velasco, H.; Rizzotto, M. [Grupo de Estudios Ambientales. Instituto de Matematica Aplicada San Luis. Universidad National de San Luis--CONICET. Ejercito de los Andes 950. Argentina (Argentina); Di Gregorio, D. E.; Huck, H. [Departamento de Fisica, Comision National de Energia Atomica, Av. Gral. Paz 1499, 1650 San Martin, Provincia de Buenos Aires (Argentina); Escuela de Ciencia y Tecnologia, Universidad National de San Martin. Martin de Irigoyen 3100, 1650 San Martin, Provincia de Buenos Aires, Argentina. (Argentina)

2008-08-07T23:59:59.000Z

171

Cold quark matter, quadratic corrections, and gauge/string duality  

Science Journals Connector (OSTI)

We make an estimate of the quadratic correction in the pressure of cold quark matter using gauge/string duality.

Oleg Andreev

2010-04-05T23:59:59.000Z

172

A Generalized Maximal Abelian Gauge in SU(3) Lattice Gauge Theory  

E-Print Network (OSTI)

We introduce a generalized Maximum Abelian Gauge (MAG). We work with this new gauge on 12^4 lattices for beta=5.7,5.8 and 16^4 lattices for beta=5.9,6.0. We also introduce a form of abelian projection related to the generalized MAG. We measure U(1)xU(1) wilson loops and single color magnetic current densities.

William W. Tucker; John D. Stack

2002-09-18T23:59:59.000Z

173

Light-induced gauge fields for ultracold atoms  

E-Print Network (OSTI)

Gauge fields are central in our modern understanding of physics at all scales. At the highest energy scales known, the microscopic universe is governed by particles interacting with each other through the exchange of gauge bosons. At the largest length scales, our universe is ruled by gravity, whose gauge structure suggests the existence of a particle - the graviton - that mediates the gravitational force. At the mesoscopic scale, solid-state systems are subjected to gauge fields of different nature: materials can be immersed in external electromagnetic fields, but they can also feature emerging gauge fields in their low-energy description. In this review, we focus on another kind of gauge field: those engineered in systems of ultracold neutral atoms. In these setups, atoms are suitably coupled to laser fields that generate effective gauge potentials in their description. Neutral atoms "feeling" laser-induced gauge potentials can potentially mimic the behavior of an electron gas subjected to a magnetic field, but also, the interaction of elementary particles with non-Abelian gauge fields. Here, we review different realized and proposed techniques for creating gauge potentials - both Abelian and non-Abelian - in atomic systems and discuss their implication in the context of quantum simulation. While most of these setups concern the realization of background and classical gauge potentials, we conclude with more exotic proposals where these synthetic fields might be made dynamical, in view of simulating interacting gauge theories with cold atoms.

N. Goldman; G. Juzeliunas; P. Ohberg; I. B. Spielman

2014-12-12T23:59:59.000Z

174

More anomaly free models of six-dimensional gauged supergravity  

SciTech Connect

We construct a huge number of anomaly free models of six-dimensional N=(1,0) gauged supergravity. The gauge groups are products of U(1) and SU(2), and every hyperino is charged under some of the gauge groups. It is also found that the potential may have flat directions when the R-symmetry is diagonally gauged together with another gauge group. In an Appendix, we determine the contribution to the global SU(2) anomaly from symplectic Majorana Weyl fermions in six dimensions.

Suzuki, Ryo; Tachikawa, Yuji [Department of Physics, Faculty of Science, University of Tokyo, Tokyo 113-0033 (Japan); Department of Physics, Faculty of Science, University of Tokyo, Tokyo 113-0033, Japan and Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106 (United States)

2006-06-15T23:59:59.000Z

175

Poincaré subalgebra and gauge invariance in nucleon structure  

E-Print Network (OSTI)

By separating the gluon field into physical and pure-gauge components, the usual Poincar\\'e subalgebra for an interacting system can be reconciled with gauge-invariance when decomposing the total rotation and translation generators of QCD into quark and gluon parts. The gauge-invariant quark/gluon parts act as the generators for the gauge-invariant physical component of the quark/gluon field, not the full quark/gluon field which also contains the gauge degrees of freedom. We clarify that the naive canonical decomposition of generators, while trivially respecting the Poincar\\'e subalgebra, might not give a completely gauge-invariant quark-gluon structure of the nucleon momentum and spin, though limited invariance within a certain gauge class can be proven.

Xiang-Song Chen

2012-03-06T23:59:59.000Z

176

Gauge-Higgs unification at CERN LHC  

Science Journals Connector (OSTI)

The Higgs boson production by the gluon fusion and its decay into two photons at the LHC are investigated in the context of the gauge-Higgs unification scenario. The qualitative behaviors for these processes in the gauge-Higgs unification are quite distinguishable from those of the standard model and the universal extra dimension scenario because of the overall sign difference for the effective couplings induced by one-loop corrections through the Kaluza-Klein modes. For the Kaluza-Klein mode mass smaller than 1 TeV, the Higgs production cross section and its branching ratio into two photons are sizably deviated from those in the standard model. Associated with the discovery of the Higgs boson, this deviation may be measured at the LHC.

Nobuhito Maru and Nobuchika Okada

2008-03-17T23:59:59.000Z

177

Generalized Attractor Points in Gauged Supergravity  

SciTech Connect

The attractor mechanism governs the near-horizon geometry of extremal black holes in ungauged 4D N=2 supergravity theories and in Calabi-Yau compactifications of string theory. In this paper, we study a natural generalization of this mechanism to solutions of arbitrary 4D N=2 gauged supergravities. We define generalized attractor points as solutions of an ansatz which reduces the Einstein, gauge field, and scalar equations of motion to algebraic equations. The simplest generalized attractor geometries are characterized by non-vanishing constant anholonomy coefficients in an orthonormal frame. Basic examples include Lifshitz and Schroedinger solutions, as well as AdS and dS vacua. There is a generalized attractor potential whose critical points are the attractor points, and its extremization explains the algebraic nature of the equations governing both supersymmetric and non-supersymmetric attractors.

Kachru, Shamit; /Stanford U., Phys. Dept. /SLAC; Kallosh, Renata; /Stanford U., Phys. Dept.; Shmakova, Marina; /KIPAC, Menlo Park /SLAC /Stanford U., Phys. Dept.

2011-08-15T23:59:59.000Z

178

On Gauge Invariance and Vacuum Polarization  

Science Journals Connector (OSTI)

This paper is based on the elementary remark that the extraction of gauge invariant results from a formally gauge invariant theory is ensured if one employs methods of solution that involve only gauge covariant quantities. We illustrate this statement in connection with the problem of vacuum polarization by a prescribed electromagnetic field. The vacuum current of a charged Dirac field, which can be expressed in terms of the Green's function of that field, implies an addition to the action integral of the electromagnetic field. Now these quantities can be related to the dynamical properties of a "particle" with space-time coordinates that depend upon a proper-time parameter. The proper-time equations of motion involve only electromagnetic field strengths, and provide a suitable gauge invariant basis for treating problems. Rigorous solutions of the equations of motion can be obtained for a constant field, and for a plane wave field. A renormalization of field strength and charge, applied to the modified lagrange function for constant fields, yields a finite, gauge invariant result which implies nonlinear properties for the electromagnetic field in the vacuum. The contribution of a zero spin charged field is also stated. After the same field strength renormalization, the modified physical quantities describing a plane wave in the vacuum reduce to just those of the maxwell field; there are no nonlinear phenomena for a single plane wave, of arbitrary strength and spectral composition. The results obtained for constant (that is, slowly varying fields), are then applied to treat the two-photon disintegration of a spin zero neutral meson arising from the polarization of the proton vacuum. We obtain approximate, gauge invariant expressions for the effective interaction between the meson and the electromagnetic field, in which the nuclear coupling may be scalar, pseudoscalar, or pseudovector in nature. The direct verification of equivalence between the pseudoscalar and pseudovector interactions only requires a proper statement of the limiting processes involved. For arbitrarily varying fields, perturbation methods can be applied to the equations of motion, as discussed in Appendix A, or one can employ an expansion in powers of the potential vector. The latter automatically yields gauge invariant results, provided only that the proper-time integration is reserved to the last. This indicates that the significant aspect of the proper-time method is its isolation of divergences in integrals with respect to the proper-time parameter, which is independent of the coordinate system and of the gauge. The connection between the proper-time method and the technique of "invariant regularization" is discussed. Incidentally, the probability of actual pair creation is obtained from the imaginary part of the electromagnetic field action integral. Finally, as an application of the Green's function for a constant field, we construct the mass operator of an electron in a weak, homogeneous external field, and derive the additional spin magnetic moment of ?2? magnetons by means of a perturbation calculation in which proper-mass plays the customary role of energy.

Julian Schwinger

1951-06-01T23:59:59.000Z

179

Gauge Fields, Sources, and Electromagnetic Masses  

Science Journals Connector (OSTI)

The hypothesis of strong-interaction gauge fields, with non-Abelian gauge invariance broken only by the 1- particle mass terms, gives a natural source theory setting for the introduction of electromagnetic effects. The electromagnetic potential vector appears as a compensating field in the mass terms of the neutral 1- particles. The resulting electromagnetic self-action is used to discuss mass displacements. The pion electro-magnetic mass is computed in a number of ways—by direct calculation of various processes and by chiral methods, in two variants. The relationship of these approaches is established. A phenomenological modification of the chiral evaluation gives perfect agreement with the observed value. It is found, however, that the (m?m?)2 terms, which are neglected in this method, are not very small. Baryon electromagnetic mass splittings are described by a simple adaptation of gross mass-spectrum empirics. Agreement with the data is excellent.

Julian Schwinger

1968-01-25T23:59:59.000Z

180

Piezoelectric Versus Mechanical Spring Pressure Gauge  

Science Journals Connector (OSTI)

That difficulties in the use of various types of pressure gauges warrant meticulous scrutiny in the rendering of an accurate pressure?time curve has advanced each type of gauge for particular work. In powder gas and internal combustion engine gas pressures the spring type and piezoelectric type offer great possibilities with the first a self?contained unit and the latter a charge?collecting device and with the former following the true curve by an admitted time lag and the latter assumed to be responding instantaneously. Sparse comparative records of the two show the case to be more nearly the reverse of what the popular assumption leads one to believe. Fuller data are needed to determine the comparative lagging characteristics of both types.

R. Alden Webster

1939-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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
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181

The Gauge Hierarchy Problem and Planck Oscillators  

E-Print Network (OSTI)

A longstanding question that has puzzled Physicists is the so called gauge hierarchy problem, that is why is there such a wide gap between the mass of a Planck particle, $10^{-5}gms$ and the mass of a typical elementary particle $\\sim 10^{-25}gms$. We show that the answer to this problem lies in a particular characterization of gravitation. This moreover also provides a picture of a Planck scale underpinning for the entire universe itself.

B. G. Sidharth

2005-08-12T23:59:59.000Z

182

Lagrangian generators of the Poincaré gauge symmetries  

Science Journals Connector (OSTI)

We have systematically computed the generators of the symmetries arising in Poincaré gauge theory formulation of gravity, both in 2+1 and 3+1 dimensions. This was done using a completely Lagrangian approach. The results are expected to be valid in any dimensions, as seen through lifting the results of the 2+1 dimensional example into the 3+1 dimensional one.

Rabin Banerjee; Debraj Roy; Saurav Samanta

2010-08-06T23:59:59.000Z

183

An alternative to the gauge theoretic setting  

E-Print Network (OSTI)

The standard formulation of gauge theories results from the Lagrangian (functional integral) quantization of classical gauge theories. A more intrinsic qunantum theoretical access in the spirit of Wigner's representation theory shows that there is a fundamental clash between the pointlike localization of zero mass (vector, tensor) potentials and the Hilbert space (positivity, unitarity) structure of QT. The quantization approach has no other way than to stay with pointlike localization and sacrifice the Hilbert space whereas the approach build on the intrinsic quantum concept of modular localization keeps the Hilbert space and trades the conflict creating pointlike generation with the tightest consistent localization:: semiinfinite spacelike string localization. Whereas these potentials in the presence of interactions stay quite close to associated pointlike field strength, the interacting matter fields to which they are coupled bear the brunt of the nonlocal aspect in that they are string.generated in a way which cannot be undone by any differentiation. The new stringlike approach to gauge theory also revives the idea of a Schwinger-Higgs screening mechanism as a deeper and less metaphoric description of the Higgs spontaneous symmetry breaking and its accompanying tale about "God's particle" and its mass generation for all other particles.

Bert Schroer

2010-11-30T23:59:59.000Z

184

SHIELDING ANALYSIS FOR PORTABLE GAUGING COMBINATION SOURCES  

SciTech Connect

Radioisotopic decay has been used as a source of photons and neutrons for industrial gauging operations since the late 1950s. Early portable moisture/density gauging equipment used Americium (Am)-241/Beryllium (Be)/Cesium (Cs)-137 combination sources to supply the required nuclear energy for gauging. Combination sources typically contained 0.040 Ci of Am-241 and 0.010 Ci of CS-137 in the same source capsule. Most of these sources were manufactured approximately 30 years ago. Collection, transportation, and storage of these sources once removed from their original device represent a shielding problem with distinct gamma and neutron components. The Off-Site Source Recovery (OSR) Project is planning to use a multi-function drum (MFD) for the collection, shipping, and storage of AmBe sources, as well as the eventual waste package for disposal. The MFD is an approved TRU waste container design for DOE TRU waste known as the 12 inch Pipe Component Overpack. As the name indicates, this drum is based on a 12 inch ID stainless steel weldment approximately 25 inch in internal length. The existing drum design allows for addition of shielding within the pipe component up to the 110 kg maximum pay load weight. The 12 inch pipe component is packaged inside a 55-gallon drum, with the balance of the interior space filled with fiberboard dunnage. This packaging geometry is similar to the design of a DOT 6M, Type B shipping container.

J. TOMPKINS; L. LEONARD; ET AL

2000-08-01T23:59:59.000Z

185

The Quality Assurance Manual and EPA`s acid rain data quality  

SciTech Connect

November 15, 1990 saw the passage of the Clean Air Act Amendments of 1990. Within this law was the requirements for all electric utility units greater than 25 megawatts of generated electrical capacity to monitor SO{sub 2}, NO{sub x}, CO{sub 2}, opacity, and volumetric flow of the stack gases. This paper summarizes the Acid Rain Program`s approach to Continuous Emissions Monitoring Systems (CEMS) Quality Control and Quality Assurance requirements and their use in the market based pollution control program of Title IV of the Clean Air Act Amendments of 1990. This paper attempts to present the perspective of the authors as to what is important for excellent monitoring system availability and ensuring accurate data acquisition. Emphasis is placed upon the Quality Assurance Manual required by the Acid Rain Regulations for affected unit`s to maintain and follow.

Bloomer, B.J. [EPA, Washington, DC (United States). Acid Rain Div.; Winkler, J.P. [EPA, Dallas, TX (United States)

1995-12-31T23:59:59.000Z

186

Evaluation of Ensemble Configurations for the Analysis and Prediction of Heavy-Rain-Producing Mesoscale Convective Systems  

Science Journals Connector (OSTI)

This study investigates probabilistic forecasts made using different convection-allowing ensemble configurations for a three-day period in June 2010 when numerous heavy-rain-producing mesoscale convective systems (MCSs) occurred in the United ...

Russ S. Schumacher; Adam J. Clark

2014-11-01T23:59:59.000Z

187

Experimentally Based Estimates of Relations between X-Band Radar Signal Attenuation Characteristics and Differential Phase in Rain  

Science Journals Connector (OSTI)

Correcting observed polarimetric radar variables for attenuation and differential attenuation effects in rain is important for meteorological applications involving measurements at attenuating frequencies such as those at X band. The results of ...

Sergey Y. Matrosov; Patrick C. Kennedy; Robert Cifelli

2014-11-01T23:59:59.000Z

188

Primate Diet and Biomass in Relation to Vegetation Composition and Fruiting Phenology in a Rain Forest in Gabon  

Science Journals Connector (OSTI)

To test the hypothesis that primate populations are limited by food resources, we studied the feeding ecology of three cercopithecines and one colobine in a rain forest in central Gabon. Simultaneously, we monito...

David Brugiere; Jean-Pierre Gautier…

2002-10-01T23:59:59.000Z

189

Characteristics of U.S. Extreme Rain Events during 19992003 RUSS S. SCHUMACHER AND RICHARD H. JOHNSON  

E-Print Network (OSTI)

. JOHNSON Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado (Manuscript-rain-producing weather systems are organized and the conditions in which they occur, Schumacher and Johnson (2005

Johnson, Richard H.

190

Beamfilling correction study for retrieval of oceanic rain from passive microwave observations  

E-Print Network (OSTI)

Constant in R-T relationship????????????.??..?.??. 6 2 Spatial resolution for each TMI channel?????????????... 7 3 ARMAR system parameters ?????????.????????... 13 4 The impact of path averaging on STD of rain rate ??????..??? 21 5... except for TMI 19 GHz channel ???????????. 8 3 Same as Fig. 1 except for TMI 10 GHz channel ..????????.??.. 8 4 Comparison between Chiu?s BCF formula and real data BCF calculations???????????????????????.??.. 10 5 ARMAR observational...

Chen, Ruiyue

2004-09-30T23:59:59.000Z

191

The red rain phenomenon of Kerala and its possible extraterrestrial origin  

E-Print Network (OSTI)

A red rain phenomenon occurred in Kerala, India starting from 25th July 2001, in which the rainwater appeared coloured in various localized places that are spread over a few hundred kilometers in Kerala. Maximum cases were reported during the first 10 days and isolated cases were found to occur for about 2 months. The striking red colouration of the rainwater was found to be due to the suspension of microscopic red particles having the appearance of biological cells. These particles have no similarity with usual desert dust. An estimated minimum quantity of 50,000 kg of red particles has fallen from the sky through red rain. An analysis of this strange phenomenon further shows that the conventional atmospheric transport processes like dust storms etc. cannot explain this phenomenon. The electron microscopic study of the red particles shows fine cell structure indicating their biological cell like nature. EDAX analysis shows that the major elements present in these cell like particles are carbon and oxygen. Strangely, a test for DNA using Ethidium Bromide dye fluorescence technique indicates absence of DNA in these cells. In the context of a suspected link between a meteor airburst event and the red rain, the possibility for the extraterrestrial origin of these particles from cometary fragments is discussed.

Godfrey Louis; A. Santhosh Kumar

2006-01-02T23:59:59.000Z

192

The Roles of Cloud Drop Effective Radius and LWP in Determining Rain Properties in Marine Stratocumulus  

SciTech Connect

Numerical simulations described in previous studies showed that adding cloud condensation nuclei to marine stratocumulus can prevent their breakup from closed into open cells. Additional analyses of the same simulations show that the suppression of rain is well described in terms of cloud drop effective radius (re). Rain is initiated when re near cloud top is around 12-14 um. Cloud water starts to get depleted when column-maximum rain intensity (Rmax) exceeds 0.1 mm h-1. This happens when cloud-top re reaches 14 um. Rmax is mostly less than 0.1 mm h-1 at re<14 um, regardless of the cloud water path, but increases rapidly when re exceeds 14 um. This is in agreement with recent aircraft observations and theoretical observations in convective clouds so that the mechanism is not limited to describing marine stratocumulus. These results support the hypothesis that the onset of significant precipitation is determined by the number of nucleated cloud drops and the height (H) above cloud base within the cloud that is required for cloud drops to reach re of 14 um. In turn, this can explain the conditions for initiation of significant drizzle and opening of closed cells providing the basis for a simple parameterization for GCMs that unifies the representation of both precipitating and non-precipitating clouds as well as the transition between them. Furthermore, satellite global observations of cloud depth (from base to top), and cloud top re can be used to derive and validate this parameterization.

Rosenfeld, Daniel; Wang, Hailong; Rasch, Philip J.

2012-07-04T23:59:59.000Z

193

Influence of rain on air-sea gas exchange: Lessons from a model ocean David T. Ho,1,2  

E-Print Network (OSTI)

Influence of rain on air-sea gas exchange: Lessons from a model ocean David T. Ho,1,2 Christopher J-sea gas exchange: Lessons from a model ocean, J. Geophys. Res., 109, C08S18, doi:10.1029/2003JC001806. 1; published 1 July 2004. [1] Rain has been shown to significantly enhance the rate of air-water gas exchange

Ho, David

194

Gauge fixing and residual symmetries in gauge/gravity theories with extra dimensions  

SciTech Connect

We study compactified pure gauge/gravitational theories with gauge-fixing terms and show that these theories possess quantum mechanical supersymmetriclike symmetries between unphysical degrees of freedom. These residual symmetries are global symmetries and generated by quantum mechanical N=2 supercharges. Also, we establish a new one-parameter family of gauge choices for higher-dimensional gravity and calculate as a check of its validity one graviton exchange amplitude in the lowest tree-level approximation. We confirm that the result is indeed {xi} independent and the cancellation of the {xi} dependence is ensured by the residual symmetries. We also give a simple interpretation of the van Dam-Veltman-Zakharov discontinuity, which arises in the lowest tree-level approximation, from the supersymmetric point of view.

Lim, C. S.; Sakamoto, Makoto [Department of Physics, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501 (Japan); Nagasawa, Tomoaki [Anan National College of Technology, 265 Aoki, Minobayashi, Anan 774-0017 (Japan); Ohya, Satoshi; Sakamoto, Kazuki [Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501 (Japan)

2008-03-15T23:59:59.000Z

195

Gauge-Fixing and Residual Symmetries in Gauge/Gravity Theories with Extra Dimensions  

E-Print Network (OSTI)

We study compactified pure gauge/gravitational theories with gauge-fixing terms and show that these theories possess quantum mechanical SUSY-like symmetries between unphysical degrees of freedom. These residual symmetries are global symmetries and generated by quantum mechanical N=2 supercharges. Also, we establish new one-parameter family of gauge choices for higher-dimensional gravity, and calculate as a check of its validity one graviton exchange amplitude in the lowest tree-level approximation. We confirm that the result is indeed $\\xi$-independent and the cancellation of the $\\xi$-dependence is ensured by the residual symmetries. We also give a simple interpretation of the vDVZ-discontinuity, which arises in the lowest tree-level approximation, from the supersymmetric point of view.

C. S. Lim; Tomoaki Nagasawa; Satoshi Ohya; Kazuki Sakamoto; Makoto Sakamoto

2008-01-06T23:59:59.000Z

196

Gauge-Fixing and Residual Symmetries in Gauge/Gravity Theories with Extra Dimensions  

E-Print Network (OSTI)

We study compactified pure gauge/gravitational theories with gauge-fixing terms and show that these theories possess quantum mechanical SUSY-like symmetries between unphysical degrees of freedom. These residual symmetries are global symmetries and generated by quantum mechanical N=2 supercharges. Also, we establish new one-parameter family of gauge choices for higher-dimensional gravity, and calculate as a check of its validity one graviton exchange amplitude in the lowest tree-level approximation. We confirm that the result is indeed $\\xi$-independent and the cancellation of the $\\xi$-dependence is ensured by the residual symmetries. We also give a simple interpretation of the vDVZ-discontinuity, which arises in the lowest tree-level approximation, from the supersymmetric point of view.

Lim, C S; Ohya, Satoshi; Sakamoto, Kazuki; Sakamoto, Makoto

2008-01-01T23:59:59.000Z

197

Safety and health considerations related to vacuum gauging  

Science Journals Connector (OSTI)

Safety or health hazards exist with some common types of vacuum gauging including mercury manometers thermal conductivity gauges and ionization gauges. Mercury filled manometers and McLeod gauges have been replaced by other gauging in most applications. The difficulty with thermal conductivity gauges arises because the calibration curves for various gases diverge widely at the upper end of the range from 10 to 1000 Torr. When they are used to monitor backfilling to atmospheric pressure dangerous over or under pressure situations may exist if the identity of the gas is not known. The greatest danger with hot cathodeionization gauge systems is electric shock from the high voltages supplied by the control unit. Especially with gauges using electron bombardment degas proper use of grounds cables and connectors is necessary. A concern with many hot cathodeionization gauge sensors is the thorium oxide electron emitting coating on the cathode. Natural thorium is an alpha emitter with a half?life of 1.4×1010 years. Yttrium oxide is a safe alternate coating material now available in ionization gauges.

R. N. Peacock

1993-01-01T23:59:59.000Z

198

Vortex and gap generation in gauge models of graphene  

E-Print Network (OSTI)

Effective quantum field theoretical continuum models for graphene are investigated. The models include a complex scalar field and a vector gauge field. Different gauge theories are considered and their gap patterns for the scalar, vector, and fermion excitations are investigated. Different gauge groups lead to different relations between the gaps, which can be used to experimentally distinguish the gauge theories. In this class of models the fermionic gap is a dynamic quantity. The finite-energy vortex solutions of the gauge models have the flux of the "magnetic field" quantized, making the Bohm-Aharonov effect active even when external electromagnetic fields are absent. The flux comes proportional to the scalar field angular momentum quantum number. The zero modes of the Dirac equation show that the gauge models considered here are compatible with fractionalization.

O. Oliveira; C. E. Cordeiro; A. Delfino; W. de Paula; T. Frederico

2010-12-21T23:59:59.000Z

199

An automated vacuum gauge calibration system  

SciTech Connect

An automated system for calibrating vacuum gauges over the pressure range of 10{sup {minus}6} to 0.1 Pa was designed and constructed at the National Institute of Standards and Technology (NIST) for the Department of Energy (DOE) Primary Standards Laboratory at Sandia National Laboratories (SNL). Calculable pressures are generated by passing a known flow of gas through an orifice of known conductance. The orifice conductance is derived from dimensional measurements and accurate flows are generated using metal capillary leaks. The expanded uncertainty (k = 2) in the generated pressure is estimated to be between 1% and 4% over the calibration range. The design, calibration results. and component uncertainties will be discussed.

Abbott, P.J. [NIST, GAithersburg, MD (United States); Benner, M.S. [Sandia National Labs., Albuquerque, NM (United States)

1998-04-01T23:59:59.000Z

200

Thread gauge for measuring thread pitch diameters  

DOE Patents (OSTI)

A thread gauge which attaches to a vernier caliper to measure the thread pitch diameter of both externally threaded and internally threaded parts is disclosed. A pair of anvils are externally threaded with threads having the same pitch as those of the threaded part. Each anvil is mounted on a stem having a ball on which the anvil can rotate to properly mate with the parts to which the anvils are applied. The stems are detachably secured to the caliper blades by attachment collars having keyhole openings for receiving the stems and caliper blades. A set screw is used to secure each collar on its caliper blade. 2 figs.

Brewster, A.L.

1985-11-19T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

Thread gauge for measuring thread pitch diameters  

DOE Patents (OSTI)

A thread gauge which attaches to a vernier caliper to measure the thread pitch diameter of both externally threaded and internally threaded parts. A pair of anvils are externally threaded with threads having the same pitch as those of the threaded part. Each anvil is mounted on a stem having a ball on which the anvil can rotate to properly mate with the parts to which the anvils are applied. The stems are detachably secured to the caliper blades by attachment collars having keyhole openings for receiving the stems and caliper blades. A set screw is used to secure each collar on its caliper blade.

Brewster, Albert L. (R.R. 2, Box 190A, Pleasant Hill, MO 64080)

1985-01-01T23:59:59.000Z

202

Local renormalizable gauge theories from nonlocal operators  

SciTech Connect

The possibility that nonlocal operators might be added to the Yang-Mills action is investigated. We point out that there exists a class of nonlocal operators which lead to renormalizable gauge theories. These operators turn out to be localizable by means of the introduction of auxiliary fields. The renormalizability is thus ensured by the symmetry content exhibited by the resulting local theory. The example of the nonlocal operator Tr{integral}A{sub {mu}}1/(D{sup 2}) A{sub {mu}} is analyzed in detail. A few remarks on the possible role that these operators might have for confining theories are outlined.

Capri, M.A.L. [UERJ, Universidade do Estado do Rio de Janeiro, Rua Sao Francisco Xavier 524, 20550-013 Maracana, Rio de Janeiro (Brazil)], E-mail: marcio@dft.if.uerj.br; Lemes, V.E.R. [UERJ, Universidade do Estado do Rio de Janeiro, Rua Sao Francisco Xavier 524, 20550-013 Maracana, Rio de Janeiro (Brazil)], E-mail: vitor@dft.if.uerj.br; Sobreiro, R.F. [CBPF, Centro Brasileiro de Pesquisas Fisicas, Rua Xavier Sigaud 150, 22290-180 Urca, Rio de Janeiro (Brazil)], E-mail: sobreiro@cbpf.br; Sorella, S.P. [UERJ, Universidade do Estado do Rio de Janeiro, Rua Sao Francisco Xavier 524, 20550-013 Maracana, Rio de Janeiro (Brazil)], E-mail: sorella@uerj.br; Thibes, R. [UERJ, Universidade do Estado do Rio de Janeiro, Rua Sao Francisco Xavier 524, 20550-013 Maracana, Rio de Janeiro (Brazil)], E-mail: thibes@dft.if.uerj.br

2008-03-15T23:59:59.000Z

203

Confinement in SU(3: Simple and Generalized Maximal Abelian Gauge  

E-Print Network (OSTI)

The general problem of obtaining reliable results from gauge-fixing and projection is discussed. It is shown that the usual form of the maximal abelian gauge gives poor results for the string tension in SU(3) lattice gauge theory. A generalized form is suggested. Evidence is presented that monopoles in SU(3) are associated with SU(2) subgroups, and that P-vortices pass through monopoles, similar to what happens in SU(2).

John D. Stack; William W. Tucker; Roy J. Wensley

2002-05-06T23:59:59.000Z

204

A perturbative and gauge invariant treatment of gravitational wave memory  

E-Print Network (OSTI)

We present a perturbative treatment of gravitational wave memory. The coordinate invariance of Einstein's equations leads to a type of gauge invariance in perturbation theory. As with any gauge invariant theory, results are more clear when expressed in terms of manifestly gauge invariant quantities. Therefore we derive all our results from the perturbed Weyl tensor rather than the perturbed metric. We derive gravitational wave memory for the Einstein equations coupled to a general energy-momentum tensor that reaches null infinity.

Lydia Bieri; David Garfinkle

2013-12-24T23:59:59.000Z

205

RIKEN BNL RESEARCH CENTER WORKSHOP ON GAUGE-INVARIANT VARIABLES IN GAUGE THEORIES, VOLUME 20  

SciTech Connect

This four-day workshop focused on the wide variety of approaches to the non-perturbative physics of QCD. The main topic was the formulation of non-Abelian gauge theory in orbit space, but some other ideas were discussed, in particular the possible extension of the Maldacena conjecture to nonsupersymmetric gauge theories. The idea was to involve most of the participants in general discussions on the problem. Panel discussions were organized to further encourage debate and understanding. Most of the talks roughly fell into three categories: (1) Variational methods in field theory; (2) Anti-de Sitter space ideas; (3) The fundamental domain, gauge fixing, Gribov copies and topological objects (both in the continuum and on a lattice). In particular some remarkable progress in three-dimensional gauge theories was presented, from the analytic side by V.P. Nair and mostly from the numerical side by O. Philipsen. This work may ultimately have important implications for RHIC experiments on the high-temperature quark-gluon plasma.

VAN BAAL,P.; ORLAND,P.; PISARSKI,R.

2000-06-01T23:59:59.000Z

206

Gravitational Contributions to Gauge Green's Functions and Asymptotic Free Power-Law Running of Gauge Coupling  

E-Print Network (OSTI)

We perform an explicit one-loop calculation for the gravitational contributions to the two-, three- and four-point gauge Green's functions with paying attention to the quadratic divergences. It is shown for the first time in the diagrammatic calculation that the Slavnov-Taylor identities are preserved even if the quantum graviton effects are included at one-loop level, such a conclusion is independent of the choice of regularization schemes. We also present a regularization scheme independent calculation based on the gauge condition independent background field framework of Vilkovisky-DeWitt's effective action with focusing on both the quadratic divergence and quartic divergence that is not discussed before. With the harmonic gauge condition, the results computed by using the traditional background field method can consistently be recovered from the Vilkovisky-DeWitt's effective action approach by simply taking a limiting case, and are found to be the same as the ones yielded by the diagrammatic calculation. As a consequence, in all the calculations, the symmetry-preserving and divergent-behavior-preserving loop regularization method can consistently lead to a nontrivial gravitational contribution to the gauge coupling constant with an asymptotic free power-law running at one loop near the Planck scale.

Yong Tang; Yue-Liang Wu

2011-10-30T23:59:59.000Z

207

Some mathematical properties of gauge transformations with respect to the Coulomb's gauge  

E-Print Network (OSTI)

: variational analysis of an energy functional M. P. B'eccar Varela, M. C. Caputo, M. B. Ferraro z Departamento. Pab. I (1428) Buenos Aires, Argentina P. Lazzeretti y , Dipartimento di Chimica dell'Universit`a degli) Buenos Aires, Argentina Abstract As gauge invariance of computed magnetic properties, usually par

208

Divergences of generalized quantum electrodynamics on the Lorenz gauge  

SciTech Connect

In this paper we study the Generalized Quantum Electrodynamics (GQED4) on the Lorenz gauge condition and show that divergences are still present in the theory.

Bufalo, R.; Pimentel, B. M. [Instituto de Fisica Teorica, UNESP - Sao Paulo State University P. O. Box 70532-2, 01156-970, Sao Paulo, SP (Brazil); Zambrano, G. E. [Departamento de Fisica, Universidad de Narino Calle 18 Carrera 50, San Juan de Pasto, Narino (Colombia)

2013-03-25T23:59:59.000Z

209

Gribov ambiguities at the Landau -- maximal Abelian interpolating gauge  

E-Print Network (OSTI)

In a previous work, we presented a new method to account for the Gribov ambiguities in non-Abelian gauge theories. The method consists on the introduction of an extra constraint which directly eliminates the infinitesimal Gribov copies without the usual geometric approach. Such strategy allows to treat gauges with non-hermitian Faddeev-Popov operator. In this work, we apply this method to a gauge which interpolates among the Landau and maximal Abelian gauges. The result is a local and power counting renormalizable action, free of infinitesimal Gribov copies. Moreover, the interpolating tree-level gluon propagator is derived.

A. D. Pereira Jr; R. F. Sobreiro

2014-07-16T23:59:59.000Z

210

Gauge Theories on an Interval: Unitarity Without a Higgs Boson  

E-Print Network (OSTI)

breaking without a Higgs boson. Gauge Theories on anscattering amplitude. The Higgs boson is localized at y = ?Rreal scalar ?eld, the Higgs boson. At tree level, the

Csaki, Csaba; Grojean, Christophe; Murayama, Hitoshi; Luigi, Pilo; Terning, John

2004-01-01T23:59:59.000Z

211

Optically generated gauge potentials and their effects in cold atoms.  

E-Print Network (OSTI)

??Recent theoretical studies show the possibility of generating optical gauge potentials in neutral atoms using laser beams carrying orbital angular momentum. This is interesting not… (more)

Song, Jianjun

2008-01-01T23:59:59.000Z

212

Gauge Symmetry and Gravito-Electromagnetism  

E-Print Network (OSTI)

A tensor description of perturbative Einsteinian gravity about an arbitrary background spacetime is developed. By analogy with the covariant laws of electromagnetism in spacetime, gravito-electromagnetic potentials and fields are defined to emulate electromagnetic gauge transformations under substitutions belonging to the gauge symmetry group of perturbative gravitation. These definitions have the advantage that on a flat background, with the aid of a covariantly constant timelike vector field, a subset of the linearised gravitational field equations can be written in a form that is fully analogous to Maxwell's equations (without awkward factors of 4 and extraneous tensor fields). It is shown how the remaining equations in the perturbed gravitational system restrict the time dependence of solutions to these equations and thereby prohibit the existence of propagating vector fields. The induced gravito-electromagnetic Lorentz force on a test particle is evaluated in terms of these fields together with the torque on a small gyroscope. It is concluded that the analogy of perturbative gravity to Maxwell's description of electromagnetism can be valuable for (quasi-)stationary gravitational phenomena but that the analogy has its limitations.

Simon J. Clark; Robin W. Tucker

2000-03-31T23:59:59.000Z

213

Nonextensive lattice gauge theories: algorithms and methods  

E-Print Network (OSTI)

High-energy phenomena presenting strong dynamical correlations, long-range interactions and microscopic memory effects are well described by nonextensive versions of the canonical Boltzmann-Gibbs statistical mechanics. After a brief theoretical review, we introduce a class of generalized heat-bath algorithms that enable Monte Carlo lattice simulations of gauge fields on the nonextensive statistical ensemble of Tsallis. The algorithmic performance is evaluated as a function of the Tsallis parameter q in equilibrium and nonequilibrium setups. Then, we revisit short-time dynamic techniques, which in contrast to usual simulations in equilibrium present negligible finite-size effects and no critical slowing down. As an application, we investigate the short-time critical behaviour of the nonextensive hot Yang-Mills theory at q- values obtained from heavy-ion collision experiments. Our results imply that, when the equivalence of statistical ensembles is obeyed, the long-standing universality arguments relating gauge theories and spin systems hold also for the nonextensive framework.

Rafael B. Frigori

2014-04-26T23:59:59.000Z

214

An anticipatory integrated assessment of regional acidification: The RAINS-Asia model  

SciTech Connect

Across large parts of Asia, air pollution problems are becoming more and more evident. Rainfall in some areas, including China, Japan, and Thailand, has been measured to be 10 times more acidic than unpolluted rain. Increasing evidence of acidification damage to ecosystems such as surface waters, soils, and economically important crops, is beginning to appear. In addition, urban air quality in many areas of the region continues to decrease. Current economic forecasts predict continued rapid economic growth in the region, which will bring with it increasing emissions of air pollutants, especially sulfur. The total primary energy demand in Asia currently doubles every twelve years (as compared to a world average of every 28 years). Coal is expected to continue to be the dominant energy source, with coal demand projected to increase by 65 percent per year, a rate that outpaces regional economic growth. If current trends in economic development and energy use in Asia continue, emissions of sulfur dioxide, one of the key components in acid rain, will more than triple within the next 30 years. Many ecosystems will be unable to continue to absorb these increased levels of pollution without harmful effects, thus creating a potential danger for irreversible environmental damage in many areas. In view of the potential environmental consequences of projected growth in Asian energy consumption, emissions, and air pollution, the World Bank, together with the Asian Development Bank, have funded a project to develop and implement an integrated assessment model for the acid deposition phenomenon in Asia. The Regional Air Pollution INformation and Simulation model for Asia (RAINS-Asia) is a software tool to help decision makers assess and project future trends in emissions, transport, and deposition of air pollutants, and their potential environmental effects.

Amann, M. [International Institute for Applied Systems Analysis, Laxenburg (Austria); Carmichael, G.R. [Univ. of Iowa, Iowa City, IA (United States); Foell, W. [Resource Management Associates, Madison, WI (United States)] [and others

1996-12-31T23:59:59.000Z

215

Bulk viscosity of gauge theory plasma at strong coupling  

E-Print Network (OSTI)

We propose a lower bound on bulk viscosity of strongly coupled gauge theory plasmas. Using explicit example of the N=2^* gauge theory plasma we show that the bulk viscosity remains finite at a critical point with a divergent specific heat. We present an estimate for the bulk viscosity of QGP plasma at RHIC.

Alex Buchel

2007-08-27T23:59:59.000Z

216

The effects of fermions on lattice gauge theories with scalars  

SciTech Connect

The effects of fermions on the gauge-Higgs systems are investigated in the context of an SU(2) lattice gauge theory with scalar and fermion fields. The results from analytic studies and numerical simulations, with quenched and dynamical fermions, are presented. Some physical implications are discussed. 19 refs., 8 figs.

Lee, I-Hsiu

1988-01-01T23:59:59.000Z

217

Processing data from scanning gauges on industrial web processes  

Science Journals Connector (OSTI)

This paper considers the processing of data collected by scanning gauges from industrial web processes such as metal rolling, coating, paper making and plastic film extrusion. It describes a method based upon the generalised sampling theorem for reconstructing ... Keywords: Cross-directional control, Gauging, Sampling, Two-dimensional systems, Web processes

Stephen Duncan; Peter Wellstead

2004-03-01T23:59:59.000Z

218

Some Global Aspects of Gauge Anomalies of Semisimple Gauge Groups and Fermion Generations in GUT and Superstring Theories  

E-Print Network (OSTI)

We study more extensively and completely for global gauge anomalies with some semisimple gauge groups as initiated in ref.1. A detailed and complete proof or derivation is provided for the Z_2 global gauge anomaly given in ref.1 for a gauge theory with the semisimple gauge group SU(2)\\times SU(2)\\times SU(2) in D=4 dimensions and Weyl fermions in the irreducible representation (IR) \\omega=(2,2,2) with 2 denoting the corresponding dimensions. This Z_2 anomaly was used in the discussions related to generic SO(10) and supersymmetric SO(10) unification theories^1 for the total generation numbers of fermions and mirror fermions. Our result^1 that the global anomaly coefficient formula is given by A(\\omega)=exp[i{\\pi}Q_2(\\Box)]=-1 in this case with Q_2(\\Box) being the Dynkin index for SU(8) in the fundamental IR (\\Box)=(8) is also discussed, and as shown by our results^1 that the semisimple gauge transformations collectively may have physical consequences which do not correspond to successive simple gauge transformations. The similar result given in ref.1 for the Z_2 global gauge anomaly of gauge group SU(2)\\times SU(2) is also discussed. We also give a complete proof for some relevent topological results. Gauge anomalies for the relevant semisimple gauge groups are also briefly discussed in higher dimensions, especially for self-contragredient representations, with discussions involving trace identities relating to ref.14. We also remark the connection of our results and discussions to the total generation numbers in relevant theories.

H. Zhang

2005-05-11T23:59:59.000Z

219

Former Auto Worker Gauges Efficiency of American Homes | Department of  

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

Former Auto Worker Gauges Efficiency of American Homes Former Auto Worker Gauges Efficiency of American Homes Former Auto Worker Gauges Efficiency of American Homes December 2, 2009 - 5:20pm Addthis Joshua DeLung Doing good deeds for others is what Pete Boogaart in Holland, Mich., is all about. Pete, who's a married empty-nester with four kids, lost his job in January after keeping Americans safe and comfortable by testing car parts for the last 15 years. But through volunteering for a local action agency, he retooled his old skills and scored a new job as a weatherization inspector. His experience using gauges and other testing equipment made him a shoo-in. When he was in the car industry, he used gauges to test everything, down to the latch that holds the center console closed. "There are certain mandatory tests in weatherization that you have to do

220

Former Auto Worker Gauges Efficiency of American Homes | Department of  

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

Former Auto Worker Gauges Efficiency of American Homes Former Auto Worker Gauges Efficiency of American Homes Former Auto Worker Gauges Efficiency of American Homes December 2, 2009 - 5:20pm Addthis Joshua DeLung Doing good deeds for others is what Pete Boogaart in Holland, Mich., is all about. Pete, who's a married empty-nester with four kids, lost his job in January after keeping Americans safe and comfortable by testing car parts for the last 15 years. But through volunteering for a local action agency, he retooled his old skills and scored a new job as a weatherization inspector. His experience using gauges and other testing equipment made him a shoo-in. When he was in the car industry, he used gauges to test everything, down to the latch that holds the center console closed. "There are certain mandatory tests in weatherization that you have to do

Note: This page contains sample records for the topic "bucket rain gauge" 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

Gauge-independent approach to resonant transition amplitudes  

Science Journals Connector (OSTI)

We present a new gauge-independent approach to resonant transition amplitudes with nonconserved external currents, based on the pinch technique method. In the context of 2?2 and 2?3 scattering processes we show explicitly that the analytic results derived respect U(1)em gauge symmetry and do not depend on the choice of the SU(2)L gauge fixing. Our analytic approach treats, on equal footing, fermionic as well as bosonic contributions to the resummed gauge boson propagators, does not contain any residual spacelike threshold terms, shows the correct high-energy unitarity behavior, admits renormalization, and satisfies a number of other required properties, including the optical theorem. Even though our analysis has mainly focused on the standard model gauge bosons, our method can easily be extended to the top quark, and be directly applied to the study of unstable particles present in renormalizable models of new physics. © 1996 The American Physical Society.

Joannis Papavassiliou and Apostolos Pilaftsis

1996-02-15T23:59:59.000Z

222

Holography as a Gauge Phenomenon in Higher Spin Duality  

E-Print Network (OSTI)

Employing the world line spinning particle picture we discuss the appearance of several different `gauges' which we use to gain a deeper explanation of the Collective/Gravity identification. We discuss transformations and algebraic equivalences between them. For a bulk identification we develop a `gauge independent' representation where all gauge constraints are eliminated. This `gauge reduction' of Higher Spin Gravity demonstrates that the physical content of 4D AdS HS theory is represented by the dynamics of an unconstrained scalar field in 6d. It is in this gauge reduced form that HS Theory can be seen to be equivalent to a 3+3 dimensional bi-local collective representation of CFT3.

Robert de Mello Koch; Antal Jevicki; Joao P. Rodrigues; Junggi Yoon

2014-11-20T23:59:59.000Z

223

More on Potts lattice gauge theories  

SciTech Connect

N-state Potts lattice gauge theories are studied for all N in 2+1 and 3+1 dimensions using 1/N expansions and strong-coupling analyses. In 2+1 dimensions all models with N> or approx. =N* = 2.6 --2.8 undergo first-order phase transitions between a confining and a free charge region. For N

Kogut, J.B.; Sinclair, D.K.

1981-06-15T23:59:59.000Z

224

Localization of gauge fields and monopole tunnelling  

SciTech Connect

We study the dynamical localization of a massless gauge field on a lower-dimensional surface (2-brane). In flat space, the necessary and sufficient condition for this phenomenon is the existence of confinement in the bulk. The resulting configuration is equivalent to a dual Josephson junction. This duality leads to an interesting puzzle, as it implies that a localized massless theory, even in the Abelian case, must become confining at exponentially large distances. Through the use of topological arguments we clarify the physics behind this large-distance confinement and identify the instantons of the brane world-volume theory that are responsible for its appearance. We show that they correspond to the (condensed) bulk magnetic charges (monopoles), that occasionally tunnel through the brane and induce weak confinement of the brane theory. We consider the possible generalization of this effect to higher dimensions and discuss phenomenological bounds on the confinement of electric charges at exponentially large distances within our Universe.

Dvali, G. [CERN, Theory Division, CH-1211 Geneva 23 (Switzerland); Center for Cosmology and Particle Physics, Department of Physics, New York University, New York, New York 10003 (United States); Nielsen, H. B. [CERN, Theory Division, CH-1211 Geneva 23 (Switzerland); Niels Bohr Institute, Copenhagen DK 2100 (Denmark); Tetradis, N. [Department of Physics, University of Athens, Zographou 157 84, Athens (Greece)

2008-04-15T23:59:59.000Z

225

Dynamic C-metrics in (Gauged) Supergravities  

E-Print Network (OSTI)

We construct an exact time-dependent charged dilaton C-metric in four-dimensional ${\\cal N}=4$ gauged supergravity. The scalar field drives the time evolution by transferring energy to the black holes, thereby causing their masses to increase and their acceleration to decrease. The values of the electric/magnetic and scalar charges determine three regions of potential time evolution. This solution holographically describes a strongly-coupled three-dimensional conformal field theory on the background of an evolving black hole. We also find new static charged dilaton C-metrics, which arise in four-dimensional Einstein-Maxwell-dilaton theories whose scalar potential can be expressed in terms of a superpotential.

H. Lu; Justin F. Vazquez-Poritz

2014-08-13T23:59:59.000Z

226

Discrete Abelian gauge symmetries and axions  

E-Print Network (OSTI)

We combine two popular extensions of beyond the Standard Model physics within the framework of intersecting D6-brane models: discrete Zn symmetries and Peccei-Quinn axions. The underlying natural connection between both extensions is formed by the presence of massive U(1) gauge symmetries in D-brane model building. Global intersecting D6-brane models on toroidal orbifolds of the type T6/Z2N and T6/Z2xZ2M with discrete torsion offer excellent playgrounds for realizing these extensions. A generation-dependent Z2 symmetry is identified in a global Pati-Salam model, while global left-right symmetric models give rise to supersymmetric realizations of the DFSZ axion model. In one class of the latter models, the axion as well as Standard Model particles carry a non-trivial Z3 charge.

Honecker, Gabriele

2015-01-01T23:59:59.000Z

227

Discrete Abelian gauge symmetries and axions  

E-Print Network (OSTI)

We combine two popular extensions of beyond the Standard Model physics within the framework of intersecting D6-brane models: discrete Zn symmetries and Peccei-Quinn axions. The underlying natural connection between both extensions is formed by the presence of massive U(1) gauge symmetries in D-brane model building. Global intersecting D6-brane models on toroidal orbifolds of the type T6/Z2N and T6/Z2xZ2M with discrete torsion offer excellent playgrounds for realizing these extensions. A generation-dependent Z2 symmetry is identified in a global Pati-Salam model, while global left-right symmetric models give rise to supersymmetric realizations of the DFSZ axion model. In one class of the latter models, the axion as well as Standard Model particles carry a non-trivial Z3 charge.

Gabriele Honecker; Wieland Staessens

2015-02-03T23:59:59.000Z

228

Colloquium: Artificial gauge potentials for neutral atoms  

SciTech Connect

When a neutral atom moves in a properly designed laser field, its center-of-mass motion may mimic the dynamics of a charged particle in a magnetic field, with the emergence of a Lorentz-like force. In this Colloquium the physical principles at the basis of this artificial (synthetic) magnetism are presented. The corresponding Aharonov-Bohm phase is related to the Berry's phase that emerges when the atom adiabatically follows one of the dressed states of the atom-laser interaction. Some manifestations of artificial magnetism for a cold quantum gas, in particular, in terms of vortex nucleation are discussed. The analysis is then generalized to the simulation of non-Abelian gauge potentials and some striking consequences are presented, such as the emergence of an effective spin-orbit coupling. Both the cases of bulk gases and discrete systems, where atoms are trapped in an optical lattice, are addressed.

Dalibard, Jean; Gerbier, Fabrice; Juzeliunas, Gediminas; Oehberg, Patrik [Laboratoire Kastler Brossel, CNRS, UPMC, Ecole normale superieure, 24 rue Lhomond, 75005, Paris (France); Institute of Theoretical Physics and Astronomy, Vilnius University, A. Gostauto 12, Vilnius 01108 (Lithuania); SUPA, Department of Physics, Heriot-Watt University, Edinburgh, EH14 4AS (United Kingdom)

2011-10-01T23:59:59.000Z

229

E-Print Network 3.0 - anomalous gauge theories Sample Search...  

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

Magiera, Andrzej - Instytut Fizyki, Uniwersytet Jagiellonski Collection: Physics 43 Ising lattice gauge theory and confinement Summary: Ising lattice gauge theory and...

230

E-Print Network 3.0 - artificial gauge freedom Sample Search...  

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

... Source: Ecole Polytechnique, Centre de mathmatiques Collection: Mathematics 11 Ising lattice gauge theory and confinement Summary: Ising lattice gauge theory and...

231

E-Print Network 3.0 - affine gauge theory Sample Search Results  

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

Laboratory & Department of Physics, University of Chicago Collection: Physics 13 Ising lattice gauge theory and confinement Summary: Ising lattice gauge theory and...

232

Tide Gauge Observations of 2004–2007 Indian Ocean Tsunamis from Sri Lanka and Western Australia  

Science Journals Connector (OSTI)

Tide gauge data collected from Sri Lanka (three ... the local and regional topography. At all tide gauges, the spectral energy corresponding to periods between 20 and 85...

Charitha B. Pattiaratchi; E. M. Sarath Wijeratne

2009-02-01T23:59:59.000Z

233

E-Print Network 3.0 - advanced technology gauge Sample Search...  

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

in regions... such as Florida. To overcome some of the gauge placement issues, remote sensing techniques have been introduced... -derived precipitation with gauge...

234

Ising-Gauge Ising-Higgs System in Two Dimensions  

Science Journals Connector (OSTI)

A brief review for Refs.[1] and [2] is presented. -gauge and -Higgs action on 2-dimensional lattice is given in terms of standard procedures. The duality transformations for lattice gauge fields are used for relating such model to Ising model with . We regard the close to the critical point of 2-dimensional Ising model as a concrete realization of the renormalized, continuous and Euclidean invariant (i.e., Lorentz invariant) gauge field theory, or Ising-gauge Ising-Higgs field theory in two dimensions. When or , respectively, while , and let as well as be finite, both the symmetry non-breaking -gauge field theory and the spontaneous breaking -gauge field theory are obtained. Then, we use recent calculation of correlation functions of 2-dimensional Ising model in both the absence and the presence of a magnetic field to study this -gauge -Higgs system. The correlations (i.e., renormalized Green functions) of two plaquettes and the gauge-invariant correlations of Higgs field are investigated in various cases. Comparing with 4-dimensional QCD, and can be understood as the glueball-correlations and the meson-correlations in this model, respectively. Their isolated poles in momentum space correspond to the bound states, and the poles' locations give mass spectrums of these states. For pure -gauge theory (i.e., ), if the gauge symmetry does not break ( case), has a leading pole, on the contrary, if the gauge symmetry is spontaneous breaking ( case), has a leading cut. In the presence of Higgs matter fields (i.e., ) the leading singularity of still is a pole, however, 's cut is broken into a series of poles of . On the other hand, as the gauge fields are "frozen" has a two-particle cut (and no single particle pole). But in the presence of -gauge fields, the Higgs fields will be confined, that is, has a leading pole and has a series of poles. After a tedious calculation, we confirm that the 's pole is a particle with determinate mass indeed. All these analytic calculations and expressions tell us the physics contents of 2-dimensional Ising-gauge Ising-Higgs system and show the criteria for confinement in the presence of matter. When the -gauge symmetry does not break, we may say the confining potential is very strong. However, as the -gauge symmetry breaks down spontaneously, the confining potential becomes very weak. The dynamical Higgs field imparts the dynamics to the renormalized gauge field correlations, which makes the leading cut of break into a series of poles of . It seems to be very remarkable that strong interaction and weak interaction now appear in one unification gauge theory formalism in which the confinement of elementary excitations into "mesons" or "glueballs" comes from the explicit nonperturbation calculations.

Mu-lin Yan

1985-01-01T23:59:59.000Z

235

Improved Moving Puncture Gauge Conditions for Compact Binary Evolutions  

E-Print Network (OSTI)

Robust gauge conditions are critically important to the stability and accuracy of numerical relativity (NR) simulations involving compact objects. Most of the NR community use the highly robust---though decade-old---moving-puncture (MP) gauge conditions for such simulations. It has been argued that in binary black hole (BBH) evolutions adopting this gauge, noise generated near adaptive-mesh-refinement (AMR) boundaries does not converge away cleanly with increasing resolution, severely limiting gravitational waveform accuracy at computationally feasible resolutions. We link this noise to a sharp (short-wavelength), initial outgoing gauge wave crossing into progressively lower resolution AMR grids, and present improvements to the standard MP gauge conditions that focus on stretching, smoothing, and more rapidly settling this outgoing wave. Our best gauge choice greatly reduces gravitational waveform noise during inspiral, yielding less fluctuation in convergence order and $\\sim 40%$ lower waveform phase and amplitude errors at typical resolutions. Noise in other physical quantities of interest is also reduced, and constraint violations drop by more than an order of magnitude. We expect these improvements will carry over to simulations of all types of compact binary systems, as well as other $N$+1 formulations of gravity for which MP-like gauge conditions can be chosen.

Zachariah B. Etienne; John G. Baker; Vasileios Paschalidis; Bernard J. Kelly; Stuart L. Shapiro

2014-10-06T23:59:59.000Z

236

Climate change as a confounding factor in reversibility of acidification: RAIN and CLIMEX projects Hydrology and Earth System Sciences, 5(3), 477486 (2001) EGS  

E-Print Network (OSTI)

Climate change as a confounding factor in reversibility of acidification: RAIN and CLIMEX projects to the roofed structure and a climate change manipulation (CLIMEX project) was superimposed on the clean rain 477 Hydrology and Earth System Sciences, 5(3), 477­486 (2001) © EGS Climate change as a confounding

Paris-Sud XI, Université de

237

Rain Garden construction in Monmouth County has accelerated consid-erably since the early planning days in 2003 with our local Watershed  

E-Print Network (OSTI)

and shore tour- ism industry came from people pollution Sunny Days for Rain Gardens -- Progress towardsRain Garden construction in Monmouth County has accelerated consid- erably since the early planning, Issue 3 August 2012 newsletternewsletter News of Environmental and Resource Management Issues and Events

Goodman, Robert M.

238

The transformations of non-abelian gauge fields under translations  

E-Print Network (OSTI)

I consider infinitesimal translations $x'^{\\alpha}=x^{\\alpha}+\\delta x^{\\alpha}$ and demand that Noether's approach gives a symmetric energy-momentum tensor as it is required for gravitational sources. This argument determines the transformations of non-abelian gauge fields under infinitesimal translations to differ from the usually assumed invariance by the gauge transformation, $A'^a_{\\gamma} (x') - A^a_{\\gamma}(x) = \\partial_{\\gamma} [ \\delta x_{\\beta} A^{a \\beta}(x)] + C^a_{bc} \\delta x_{\\beta} A^{c \\beta}(x) A^{b}_{\\gamma}(x)$ where the $C^a_{bc}$ are the structure constants of the gauge group.

Bernd A. Berg

2000-06-06T23:59:59.000Z

239

Angular Momentum and Energy-Momentum Densities as Gauge Currents  

E-Print Network (OSTI)

If we replace the general spacetime group of diffeomorphisms by transformations taking place in the tangent space, general relativity can be interpreted as a gauge theory, and in particular as a gauge theory for the Lorentz group. In this context, it is shown that the angular momentum and the energy-momentum tensors of a general matter field can be obtained from the invariance of the corresponding action integral under transformations taking place, not in spacetime, but in the tangent space, in which case they can be considered as gauge currents.

M. Calcada; J. G. Pereira

2002-07-11T23:59:59.000Z

240

Pure SU(3) lattice gauge theory using operators and states  

E-Print Network (OSTI)

We study pure SU(3) gauge theory on a large lattice, using Schrodinger's equation. Our approximate solution uses a basis of roughly 1000 states. Gauge invariance is recovered when the color content of the ground state is extrapolated to zero. We are able to identify the gauge invariant excitations that remain when the extrapolation is performed. In the weak coupling limit, we obtain promising results when we compare the excitation energies (masses) to known results, which we derive. We discuss the application of our nonperturbative method to the regime where glueballs are present.

J. B. Bronzan

2006-10-13T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

Renormalization of gauge theories in curved space-time  

SciTech Connect

We consider the renormalization of general gauge theories on curved space-time background, with the main assumption being the existence of a gauge-invariant and diffeomorphism invariant regularization. Using the Batalin-Vilkovisky formalism, one can show that the theory possesses gauge invariant and diffeomorphism invariant renormalizability at quantum level, up to an arbitrary order of the loop expansion. Starting from this point, we discuss the locality of the counterterms and the general prescription for constructing the power-counting renormalizable theories on curved background.

Lavrov, Peter M. [Department of Mathematical Analysis, Tomsk State Pedagogical University, 634061, Kievskaya St. 60, Tomsk (Russian Federation); Shapiro, Ilya L. [Departamento de Fisica, ICE, Universidade Federal de Juiz de Fora, Juiz de Fora, CEP: 36036-330, MG (Brazil)

2010-02-15T23:59:59.000Z

242

On the defect induced gauge and Yukawa fields in graphene  

E-Print Network (OSTI)

We consider lattice deformations (both continuous and topological) in the hexagonal lattice Hubbard model in the tight binding approximation to graphene, involving operators with the range up to next-to-neighbor. In the low energy limit, we find that these deformations give rise to couplings of the electronic Dirac field to an external scalar (Yukawa) and gauge fields. The fields are expressed in terms of original defects. As a by-product we establish that the next-to-nearest order is the minimal range of deformations which produces the complete gauge and scalar fields. We consider an example of Stone--Wales defect, and find the associated gauge field.

Corneliu Sochichiu

2010-12-24T23:59:59.000Z

243

Is SU(2) lattice gauge theory a spin glass?  

E-Print Network (OSTI)

A new order parameter is constructed for SU(2) lattice gauge theory in the context of the two-real-replica method normally used for spin glasses. The order parameter is sensitive to a global Z2 subgroup of the gauge symmetry which is seen to break spontaneously at $\\beta = 4/g^2 = 1.96\\pm 0.01$. No gauge fixing is required. Finite size scaling is consistent with a high-order paramagnet to spin glass transition with a critical exponent $\

Michael Grady

2009-07-23T23:59:59.000Z

244

Symmetry, Defects, and Gauging of Topological Phases  

E-Print Network (OSTI)

We examine the interplay of symmetry and topological order in $2+1$ dimensional topological phases of matter. We present a definition of the \\it topological symmetry \\rm group, which characterizes the symmetry of the emergent topological quantum numbers of a topological phase $\\mathcal{C}$, and describe its relation with the microscopic symmetry of the underlying physical system. We derive a general framework to classify symmetry fractionalization in topological phases, including non-Abelian phases and the possibility that the symmetries permute the quasiparticle types. We develop a theory of extrinsic defects (fluxes) associated with elements of the symmetry group, which provides a general classification of symmetry-enriched topological phases derived from a topological phase of matter $\\mathcal{C}$ with (on-site) symmetry group $G$. The algebraic theory of the defects, known as a $G$-crossed braided tensory category $\\mathcal{C}_{G}^{\\times}$, allows one to compute many properties, such as the number of topologically distinct types of defects associated with each group element, their fusion rules, quantum dimensions, zero modes, braiding exchange transformations, a generalized Verlinde formula for the defects, and modular transformations of the $G$-crossed extensions of topological phases. We also examine the promotion of the global symmetry to a local gauge invariance, wherein the extrinsic $G$-defects are turned into deconfined quasiparticle excitations, which results in a different topological phase $\\mathcal{C}/G$. A number of instructive and/or physically relevant examples are studied in detail.

Maissam Barkeshli; Parsa Bonderson; Meng Cheng; Zhenghan Wang

2014-10-16T23:59:59.000Z

245

Lots of data, how do we use it? Strengths and inaccuracies of utility acid rain electronic data reports  

SciTech Connect

Entergy Corporation is a Phase II utility with a fossil generation base composed primarily natural gas and low sulfur coal. This paper presents an analysis of a large Phase II utility`s continuous emissions monitoring data reported to EPA under Title IV Acid Rain. Electric utilities currently report hourly emissions of NOx, SO{sub 2}, CO{sub 2}, fuel use, and generation through electronic data reports to EPA. This paper describes strengths and weaknesses of the data reported to EPA as determined through an analysis of 1995 data. Emissions reported by this company tinder acid rain for SO{sub 2} and NOx are very different from emissions reported to state agencies for annual emission inventory purposes in past years and will represent a significant break with historic trends. A comparison of emissions has been made of 1995 emissions reported under Electronic Data Reports to the emissions that would have been reported using emission factors and fuel data in past years. In addition, the paper examines the impacts of 40 CFR Part 75 Acid Rain requirements such as missing data substitution and monitor bias adjustments. Measurement system errors including stack flow measurement and false NOx Lb/MMBtu readings at very low loads are discussed. This paper describes the implications for public policy, compliance, emissions inventories, and business decisions of Part 75 acid rain monitoring and reporting requirements.

Schott, J. [Entergy Corporation, Beaumont, TX (United States)

1996-12-31T23:59:59.000Z

246

Week 4, Rain in my Brain On top of the Harbor Cone, Otago Peninsula, Pacific Ocean in the distance.  

E-Print Network (OSTI)

Week 4, Rain in my Brain On top of the Harbor Cone, Otago Peninsula, Pacific Ocean in the distance of the ocean or of this beautiful city from on-high and it all comes back that we're here, a dream come true

Bardsley, John

247

Raindrop Size Distributions and Rain Characteristics in California Coastal Rainfall for Periods with and without a Radar Bright Band  

E-Print Network (OSTI)

S-band profiling radars showed that coastal winter storms in California and Oregon frequently do sites in northern California were revisited in the winter of 2003/04 in this study, which extends significant. Liquid water contents differ very little, however, for the two rain types. Dis- drometer

Yuter, Sandra

248

A Cloud-Patch Technique for Identification and Removal of No-Rain Clouds from Satellite Infrared Imagery  

Science Journals Connector (OSTI)

A new cloud-patch method for the identification and removal of no-rain cold clouds from infrared (IR) imagery is presented. A cloud patch is defined as a cluster of connected IR imagery pixels that are colder than a given IR brightness ...

Liming Xu; Soroosh Sorooshian; Xiaogang Gao; Hoshin V. Gupta

1999-08-01T23:59:59.000Z

249

Microsoft PowerPoint - 16.0855_Raines Draft Rev 4  

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

Management Update Management Update Project Management Update Bob Raines Director, Project Management Systems and Assessments * Everybody's Favorite Subject Cost Estimating * Cost Estimating * EVMS * Metrics * Take Aways Agenda 2 Agenda * Ahead of Schedule On Budget - S-2's Stretch Goal 177 Projects $92B TPC - 177 Projects, $92B TPC * Front End Planning - User Acceptance Testing - Comprehensive Training - System Documentation - Capacity/Throughput Testing Capacity/Throughput Testing - Communications via ESC * Thank You For Your Support! * Ensure New Contracts Include PARS II Requirement PARS II Everyone's Favorite Subject 3 PARS II : Everyone s Favorite Subject * DOE is Taking Advantage of PARS II Taking Advantage of PARS II Taking Advantage of PARS II Taking Advantage of PARS II - SC is Using PARS II For an IT Project

250

Acid rain: commentary on controversial issues and observations on the role of fuel burning  

SciTech Connect

Even though much information has been accumulated on the subject of acid precipitation, lack of knowledge in certain technical areas precludes an adequate understanding of (1) how serious the acid precipitation problem really is and (2) what effect controlling sources of acid precipitation precursors would have in reducing acidification. It is nevertheless possible to draw some broad conclusions regarding the problem and to ascertain the direction that the required further work should take. This report presents the results of an investigation of various issues associated with acid rain. The following topics are addressed: occurrence of acid precipitation; effects of acid precipitation; sources of acid precipitation; transport, transformation, and deposition of acid pollutants; and fuel trend analysis. Recommendations for further research are included. (DMC)

Szabo, M.F.; Esposito, M.P.; Spaite, P.W.

1982-03-01T23:59:59.000Z

251

Simplified turbulent spiral boundary layer and thermal wind simulator for acid rain modeling  

SciTech Connect

To determine the possible future impact of acid rain on the ecosystem requires the ability to numerically simulate the transport of various acids and their precursors from various sources to the locations of interest. Such a simulation is very complex and includes the evolution of the materials of interest as an aerosol within the ever changing local atmospheric motion. Wind patterns, however, are complex and difficult to model. They depend not only on local surface conditions and topology but on the global meteorological conditions. This paper presents an algebraic model to be used to simulate the vertical variation of the wind velocity and direction. The proposed model requires a minimum of input yet it qualitatively captures the mechanistic behavior of the wind with altitude. Results of the model are compared with both finite difference calculations and field data.

Lemmon, E.C.; Wiersma, G.B.; Bruns, D.A.

1986-04-01T23:59:59.000Z

252

Building Energy Software Tools Directory: EnergyGauge Summit Premier  

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

EnergyGauge Summit Premier EnergyGauge Summit Premier EnergyGauge Summit Premier logo EnergyGauge Summit Premier offers automatic reference building generation allowing considerable time savings for analyzing buildings for code compliance and green building certification. After entering a building, the software can automatically compare the building to ASHRAE Standard 90.1 2001, 2004 or 2007 reference building models, and for the appropriate building types, the ASHRAE Advanced design guidelines. Additional capabilities include the ability to run a whole building simulation as per ASHRAE Standard 90.1 Appendix G guidelines for LEED New Construction 2.2, and for computing Federal Tax Deductions as per EPACT 2005 guidelines from the Internal Revenue Service (IRS) and DOE. The software also offers the

253

Soil Density/Moisture Gauge | Department of Energy  

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

Soil Density/Moisture Gauge Soil Density/Moisture Gauge Soil Density/Moisture Gauge This scenario provides the planning instructions, guidance, and evaluation forms necessary to conduct an exercise involving a highway shipment of a soil moisture/density gauge (Class 7 - Radioactive). This exercise manual is one in a series of five scenarios developed by the Department of Energy Transportation Emergency Preparedness Program (TEPP). Responding agencies may include several or more of the following: local municipal and county fire, police, sheriff and Emergency Medical Services (EMS) personnel; state, local, and federal emergency response teams; emergency response contractors; and other emergency response resources that could potentially be provided by the carrier and the originating facility (shipper).

254

Properties of Lattice Gauge Theory Models at Low Temperatures  

Science Journals Connector (OSTI)

In quark confinement physics, the center of the gauge group plays a crucial role.1 This can be seen from a proper formulation of the problem. One would like to explain

Gerhard Mack

1980-01-01T23:59:59.000Z

255

Suppressions and cascades : insights from gauge/gravity dualities  

E-Print Network (OSTI)

At present, there are no non-perturbative analytic methods available for investigating gauge theories at large couplings. Consequently, it is desirable to explore more avenues to gain qualitative and quantitative insights. ...

Ejaz, Qudsia Jabeen

2008-01-01T23:59:59.000Z

256

New Mechanisms of Gauge-Mediated Supersymmetry Breaking  

E-Print Network (OSTI)

We introduce new mechanisms for the communication of supersymmetry breaking via gauge interactions. These models do not require complicated dynamics to induce a nonvanishing F term for a singlet. The first class of models communicates supersymmetry breaking to the visible sector through a ``mediator" field that transforms under both a messenger gauge group of the dynamical supersymmetry breaking sector and the standard model gauge group. This model has distinctive phenomenology; in particular, the scalar superpartners should be heavier by at least an order of magnitude than the gaugino superpartners. The second class of models has phenomenology more similar to the ``standard" messenger sectors. A singlet is incorporated, but the model does not require complicated mechanisms to generate a singlet F term. The role of the singlet is to couple fields from the dynamical symmetry breaking sector to fields transforming under the standard model gauge group. We also mention a potential solution to the $\\mu$ problem.

Lisa Randall

1996-12-19T23:59:59.000Z

257

Cooling, Monopoles, and Vortices in SU(2) Lattice Gauge Theory  

E-Print Network (OSTI)

We study monopoles and vortices in SU(2) lattice gauge theory on a 24**4 lattice at beta=2.50. We find a value of fundamental string tension from monopoles in the maximum Abelian gauge consistent with the full SU(2) value. Using direct and indirect center gauges, we find fundamental string tension values from P-vortices which are larger than the full SU(2) result. After a single cooling sweep, the string tensions from monopoles and P-vortices are all 30% lower than the full SU(2) value, while the U(1) string tension in the maximum Abelian gauge remains consistent with the full SU(2) result. Blocking the lattice after cooling does not restore the low values of string tension found with monopoles and vortices.

John D. Stack; William W. Tucker; Alistair Hart

2000-11-13T23:59:59.000Z

258

Local gauge-invariant generators for Wilson loops  

Science Journals Connector (OSTI)

A complete and irreducible set of gauge-invariant local generators for Wilson loops in a pure Yang-Mills theory is constructed. A few comments are made about their relevance in quantum theory in the 1N approximation scheme.

M. Azam

1989-11-15T23:59:59.000Z

259

Phase Structure of Gauge Theories on an Interval  

E-Print Network (OSTI)

We discuss gauge symmetry breaking in a general framework of gauge theories on an interval. We first derive a possible set of boundary conditions for a scalar field, which are compatible with several consistency requirements. It is shown that with these boundary conditions the scalar field can acquire a nontrivial vacuum expectation value even if the scalar mass square is positive. Any nonvanishing vacuum expectation value cannot be a constant but, in general, depends on the extra dimensional coordinate of the interval. The phase diagram of broken/unbroken gauge symmetry possesses a rich structure in the parameter space of the length of the interval, the scalar mass and the boundary conditions. We also discuss 4d chiral fermions and fermion mass hierarchies in our gauge symmetry breaking scenario.

Fujimoto, Yukihiro; Ohya, Satoshi; Sakamoto, Makoto

2011-01-01T23:59:59.000Z

260

Phase Structure of Gauge Theories on an Interval  

E-Print Network (OSTI)

We discuss gauge symmetry breaking in a general framework of gauge theories on an interval. We first derive a possible set of boundary conditions for a scalar field, which are compatible with several consistency requirements. It is shown that with these boundary conditions the scalar field can acquire a nontrivial vacuum expectation value even if the scalar mass square is positive. Any nonvanishing vacuum expectation value cannot be a constant but, in general, depends on the extra dimensional coordinate of the interval. The phase diagram of broken/unbroken gauge symmetry possesses a rich structure in the parameter space of the length of the interval, the scalar mass and the boundary conditions. We also discuss 4d chiral fermions and fermion mass hierarchies in our gauge symmetry breaking scenario.

Yukihiro Fujimoto; Tomoaki Nagasawa; Satoshi Ohya; Makoto Sakamoto

2011-08-09T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

Strings and monopoles in strongly interacting gauge theories  

E-Print Network (OSTI)

In this thesis we discuss aspects of strongly coupled gauge theories in two and three dimensions. In three dimensions, we present results for the scaling dimension and transformation properties of monopole operators in ...

Dyer, Ethan Stanley

2014-01-01T23:59:59.000Z

262

General heatbath algorithm for pure lattice gauge theory  

E-Print Network (OSTI)

A heatbath algorithm is proposed for pure SU(N) lattice gauge theory based on the Manton action of the plaquette element for general gauge group N. Comparison is made to the Metropolis thermalization algorithm using both the Wilson and Manton actions. The heatbath algorithm is found to outperform the Metropolis algorithm in both execution speed and decorrelation rate. Results, mostly in D=3, for N=2 through 5 at several values for the inverse coupling are presented.

Robert W. Johnson

2010-11-24T23:59:59.000Z

263

Towards Unifying Structures in Higher Spin Gauge Symmetry  

E-Print Network (OSTI)

This article is expository in nature, outlining some of the many still incompletely understood features of higher spin field theory. We are mainly considering higher spin gauge fields in their own right as free-standing theoretical constructs and not circumstances where they occur as part of another system. Considering the problem of introducing interactions among higher spin gauge fields, there has historically been two broad avenues of approach. One approach entails gauging a non-Abelian global symmetry algebra, in the process making it local. The other approach entails deforming an already local but Abelian gauge algebra, in the process making it non-Abelian. In cases where both avenues have been explored, such as for spin 1 and 2 gauge fields, the results agree (barring conceptual and technical issues) with Yang-Mills theory and Einstein gravity. In the case of an infinite tower of higher spin gauge fields, the first approach has been thoroughly developed and explored by M. Vasiliev, whereas the second approach, after having lain dormant for a long time, has received new attention by several authors lately. In the present paper we briefly review some aspects of the history of higher spin gauge fields as a backdrop to an attempt at comparing the gauging vs. deforming approaches. A common unifying structure of strongly homotopy Lie algebras underlying both approaches will be discussed. The modern deformation approach, using BRST-BV methods, will be described as far as it is developed at the present time. The first steps of a formulation in the categorical language of operads will be outlined. A few aspects of the subject that seems not to have been thoroughly investigated are pointed out.

Anders K. H. Bengtsson

2008-02-04T23:59:59.000Z

264

A gauge invariant cluster algorithm for the Ising spin glass  

E-Print Network (OSTI)

The frustrated Ising model in two dimensions is revisited. The frustration is quantified in terms of the number of non-trivial plaquettes which is invariant under the Nishimori gauge symmetry. The exact ground state energy is calculated using Edmond's algorithm. A novel cluster algorithm is designed which treats gauge equivalent spin glasses on equal footing and allows for efficient simulations near criticality. As a first application, the specific heat near criticality is investigated.

K. Langfeld; M. Quandt; W. Lutz; H. Reinhardt

2006-06-14T23:59:59.000Z

265

On 3-gauge transformations, 3-curvatures, and Gray-categories  

SciTech Connect

In the 3-gauge theory, a 3-connection is given by a 1-form A valued in the Lie algebra g, a 2-form B valued in the Lie algebra h, and a 3-form C valued in the Lie algebra l, where (g,h,l) constitutes a differential 2-crossed module. We give the 3-gauge transformations from one 3-connection to another, and show the transformation formulae of the 1-curvature 2-form, the 2-curvature 3-form, and the 3-curvature 4-form. The gauge configurations can be interpreted as smooth Gray-functors between two Gray 3-groupoids: the path 3-groupoid P{sub 3}(X) and the 3-gauge group G{sup L} associated to the 2-crossed module L, whose differential is (g,h,l). The derivatives of Gray-functors are 3-connections, and the derivatives of lax-natural transformations between two such Gray-functors are 3-gauge transformations. We give the 3-dimensional holonomy, the lattice version of the 3-curvature, whose derivative gives the 3-curvature 4-form. The covariance of 3-curvatures easily follows from this construction. This Gray-categorical construction explains why 3-gauge transformations and 3-curvatures have the given forms. The interchanging 3-arrows are responsible for the appearance of terms with the Peiffer commutator (, )

Wang, Wei, E-mail: wwang@zju.edu.cn [Department of Mathematics, Zhejiang University, Zhejiang 310027 (China)] [Department of Mathematics, Zhejiang University, Zhejiang 310027 (China)

2014-04-15T23:59:59.000Z

266

Low-energy U(1) x USp(2M) gauge theory from simple high-energy gauge group  

E-Print Network (OSTI)

We give an explicit example of the embedding of a near BPS low-energy (U(1) x USp(2M))/Z_2 gauge theory into a high-energy theory with a simple gauge group and adjoint matter content. This system possesses degenerate monopoles arising from the high-energy symmetry breaking as well as non-Abelian vortices due to the symmetry breaking at low energies. These solitons of different codimensions are related by the exact homotopy sequences.

Sven Bjarke Gudnason; Kenichi Konishi

2010-02-04T23:59:59.000Z

267

Gauge and Lorentz transformation placed on the same foundation  

E-Print Network (OSTI)

In this note we show that a "dynamical" interaction for arbitrary spin can be constructed in a straightforward way if gauge and Lorentz transformations are placed on the same foundation. As Lorentz transformations act on space-time coordinates, gauge transformations are applied to the gauge field. Placing these two transformations on the same ground means that all quantized field like spin-1/2 and spin-3/2 spinors are functions not only of the coordinates but also of the gauge field components. This change of perspective solves a couple of problems occuring for higher spin fields like the loss of causality, bad high-energy properties and the deviation of the gyromagnetic ratio from its constant value g=2 for any spin, as caused by applying the minimal coupling. Starting with a "dynamical" interaction, a non-minimal coupling can be derived which is consistent with causality, the expectation for the gyromagnetic ratio, and well-behaved for high energies. As a consequence, on this stage the (elektromagnetic) gauge field has to be considered as classical field. Therefore, standard quantum field theory cannot be applied. Despite this inconvenience, such a common ground is consistent with an old dream of physicists almost a century ago. Our approach, therefore, indicates a straightforward way to realize this dream.

R. Saar; S. Groote; H. Liivat; I. Ots

2011-09-20T23:59:59.000Z

268

Software Helps Kentucky County Gauge Energy Use | Department of Energy  

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

Software Helps Kentucky County Gauge Energy Use Software Helps Kentucky County Gauge Energy Use Software Helps Kentucky County Gauge Energy Use July 27, 2010 - 1:00pm Addthis How does it work? Software tracks energy usage, greenhouse gas levels and analyzes utility bills. County could see savings and cost recoveries of $100,000 to $200,000. Information allows county to make energy usage changes and identify retrofit needs. For county officials conscious of energy efficiency, deciphering complex utility bills and identifying both municipal energy-use trends and potential savings opportunities can be complex without sophisticated software. "We knew we needed a better system," says James Bush, energy manager for Lexington-Fayette Urban County, Kentucky. Last month, the county invested $140,000 of a $2.7 million Energy

269

Building Energy Software Tools Directory: EnergyGauge USA  

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

EnergyGauge USA EnergyGauge USA EnergyGauge USA logo. User-friendly residential building energy simulation which allows calculation and rating of energy use of residential buildings around the United States. ENERGYGAUGE USA, takes advantage of current generation personal computers that perform an hourly annual computer simulation in less than half a minute. Includes Manual-J system sizing analysis, and an improvement analysis mode to analyze cost-effectiveness of energy upgrades. � ENERGYGAUGE USA uses DOE-2.1E with a number of enhancements which allow superior simulation of duct air leakage and heat transfer (thermal conditions of zones in which ducts are located strongly affects performance) as well as improved calculation of air conditioners, heat pump and furnaces performance. Slab, crawlspace and basement foundation types

270

Gauge Theory for Spectral Triples and the Unbounded Kasparov Product  

E-Print Network (OSTI)

We explore factorizations of noncommutative Riemannian spin geometries over commutative base manifolds in unbounded KK-theory. After setting up the general formalism of unbounded KK-theory and improving upon the construction of internal products, we arrive at a natural bundle-theoretic formulation of gauge theories arising from spectral triples. We find that the unitary group of a given noncommutative spectral triple arises as the group of endomorphisms of a certain Hilbert bundle; the inner fluctuations split in terms of connections on, and endomorphisms of, this Hilbert bundle. Moreover, we introduce an extended gauge group of unitary endomorphisms and a corresponding notion of gauge fields. We work out several examples in full detail, to wit Yang--Mills theory, the noncommutative torus and the $\\theta$-deformed Hopf fibration over the two-sphere.

Simon Brain; Bram Mesland; Walter D. van Suijlekom

2015-01-17T23:59:59.000Z

271

Significance of gauge line error in orifice measurement  

SciTech Connect

Pulsation induced gauge line amplification can cause errors in the recorded differential signal used to calculate flow. Its presence may be detected using dual transmitters (one connected at the orifice taps, the other at the end of the gauge lines) and comparing the relative peak to peak amplitudes. Its affect on recorded differential may be determined by averaging both signals with a PC based data acquisition and analysis system. Remedial action is recommended in all cases where amplification is detected. Use of close connect, full opening manifolds, is suggested to decouple the gauge lines` resonant frequency from that of the excitation`s, by positioning the recording device as close to the process signal`s origin as possible.

Bowen, J.W. [ANR Pipeline Co., Detroit, MI (United States)

1995-12-01T23:59:59.000Z

272

Webs of domain walls in supersymmetric gauge theories  

SciTech Connect

Webs of domain walls are constructed as 1/4 Bogomol'nyi-Prasad-Sommerfield (BPS) states in d=4, N=2 supersymmetric U(N{sub C}) gauge theories with N{sub F} hypermultiplets in the fundamental representation. Webs of walls can contain any numbers of external legs and loops like (p,q) string/5-brane webs. We find the moduli space M of a 1/4 BPS equation for wall webs to be the complex Grassmann manifold. When moduli spaces of 1/2 BPS states (parallel walls) and the vacua are removed from M, the noncompact moduli space of genuine 1/4 BPS wall webs is obtained. All the solutions are obtained explicitly and exactly in the strong gauge coupling limit. In the case of Abelian gauge theory, we work out the correspondence between configurations of wall web and the moduli space CP{sup N{}sub F}{sup -1}.

Eto, Minoru; Isozumi, Youichi; Nitta, Muneto; Ohashi, Keisuke; Sakai, Norisuke [Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 (Japan)

2005-10-15T23:59:59.000Z

273

Monte Carlo simulation of gamma ray scanning gauge  

SciTech Connect

A gamma ray scanning gauge was simulated with Monte Carlo to study the properties of gamma scanning gauges and to resolve the counts coming from a {sup 235}U source from those coming from a contaminant ({sup 232}U) whose daughters emit high energy gamma rays. The simulation has been used to infer the amount of the {sup 232}U contaminant in a {sup 235}U source to select the best size for the NaI(Tl) detector crystal to minimize the effect of the contaminant. The results demonstrate that Monte Carlo simulation provides a systematic tool for designing a gauge with desired properties and for estimating properties of the gamma source from measured count rates.

Hartfield, G.L.; Freeman, L.B.; Dei, D.E.; Emert, C.J.; Glickstein, S.S.; Kahler, A.C.; Niedzwecki, P.F.

1990-12-31T23:59:59.000Z

274

Remote high-temperature insulatorless heat-flux gauge  

DOE Patents (OSTI)

A remote optical heat-flux gauge for use in extremely high temperature environments is described. This application is possible because of the use of thermographic phosphors as the sensing media, and the omission of the need for an intervening layer of insulator between phosphor layers. The gauge has no electrical leads, but is interrogated with ultraviolet or laser light. The luminescence emitted by the two phosphor layers, which is indicative of the temperature of the layers, is collected and analyzed in order to determine the heat flux incident on the surface being investigated. The two layers of thermographic phosphor must be of different materials to assure that the spectral lines collected will be distinguishable. Spatial heat-flux measurements can be made by scanning the light across the surface of the gauge. 3 figures.

Noel, B.W.

1993-12-28T23:59:59.000Z

275

Remote high-temperature insulatorless heat-flux gauge  

DOE Patents (OSTI)

A remote optical heat-flux gauge for use in extremely high temperature environments is described. This application is possible because of the use of thermographic phosphors as the sensing media, and the omission of the need for an intervening layer of insulator between phosphor layers. The gauge has no electrical leads, but is interrogated with ultraviolet or laser light. The luminescence emitted by the two phosphor layers, which is indicative of the temperature of the layers, is collected and analyzed in order to determine the heat flux incident on the surface being investigated. The two layers of thermographic phosphor must be of different materials to assure that the spectral lines collected will be distinguishable. Spatial heat-flux measurements can be made by scanning the light across the surface of the gauge.

Noel, Bruce W. (Espanola, NM)

1993-01-01T23:59:59.000Z

276

Landscape of Supersymmetry Breaking Vacua in Geometrically Realized Gauge Theories  

E-Print Network (OSTI)

We study vacuum structure of N=1 supersymmetric quiver gauge theories which can be realized geometrically by D brane probes wrapping cycles of local Calabi-Yau three-folds. In particular, we show that the A_2 quiver theory with gauge group U(N_1) \\times U(N_2) with N_1 / 2 landscape of inequivalent meta-stable vacua where supersymmetry is dynamically broken and all the moduli are stabilized. Each vacuum has distinct unbroken gauge symmetry. B-terms generated by the supersymmetry breaking give rise to gaugino masses at one-loop, and we are left with the bosonic pure Yang-Mills theory in the infrared. We also identify the supersymmetric vacua in this model using their infrared free descriptions and show that the decay rates of the supersymmetry breaking vacua into the supersymmetric vacua can be made parametrically small.

Hirosi Ooguri; Yutaka Ookouchi

2006-07-07T23:59:59.000Z

277

Topologically Robust Transport of Photons in a Synthetic Gauge Field  

E-Print Network (OSTI)

Electronic transport in low dimensions through a disordered medium leads to localization. The addition of gauge fields to disordered media leads to fundamental changes in the transport properties. For example, chiral edge states can emerge in two-dimensional systems with a perpendicular magnetic field. Here, we implement a "synthetic'' gauge field for photons using silicon-on-insulator technology. By determining the distribution of transport properties, we confirm the localized transport in the bulk and the suppression of localization in edge states, using the "gold standard'' for localization studies. Our system provides a new platform to investigate transport properties in the presence of synthetic gauge fields, which is important both from the fundamental perspective of studying photonic transport and for applications in classical and quantum information processing.

Mittal, S; Faez, S; Migdall, A; Taylor, J M; Hafezi, M

2014-01-01T23:59:59.000Z

278

Validation and Development of Melting Layer Models Using Constraints by Active/Passive Microwave Observations of Rain and the Wind-Roughened Ocean Surface  

Science Journals Connector (OSTI)

A physically based method is developed to estimate the microphysical structure of the melting layer in stratiform rain using airborne observations by a dual-frequency radar and a 10.7-GHz radiometer. The method employs a nonlinear optimal ...

Shannon T. Brown; Christopher S. Ruf

2007-04-01T23:59:59.000Z

279

Satellite Data Assimilation in Numerical Weather Prediction Models. Part II: Uses of Rain-Affected Radiances from Microwave Observations for Hurricane Vortex Analysis  

Science Journals Connector (OSTI)

A hybrid variational scheme (HVAR) is developed to produce the vortex analysis associated with tropical storms. This scheme allows for direct assimilation of rain-affected radiances from satellite microwave instruments. In the HVAR, the ...

Fuzhong Weng; Tong Zhu; Banghua Yan

2007-11-01T23:59:59.000Z

280

Synoptic-Scale Environments of Predecessor Rain Events Occurring East of the Rocky Mountains in Association with Atlantic Basin Tropical Cyclones  

Science Journals Connector (OSTI)

The synoptic-scale environments of predecessor rain events (PREs) occurring to the east of the Rocky Mountains in association with Atlantic basin tropical cyclones (TCs) are examined. PREs that occurred during 1988–2010 are subjectively classified ...

Benjamin J. Moore; Lance F. Bosart; Daniel Keyser; Michael L. Jurewicz

2013-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

Adequacy of low-sulfur coal supplies for meeting acid rain requirements  

SciTech Connect

As we have shown, acid rain legislation would create a large demand for low-sulfur bituminous coals. These coals are primarily found in Central Appalachia and in parts of the West, and would displace much of the highersulfur coal production now coming from the Midwest and Northern Appalachia. The magnitude of the related shifts in coal production are potentially huge. Previously, it has been assumed that these shifts in demands could be met by the industry. This paper has tried to highlight possible difficulties in actually meeting such demands. In the near-term, these difficulties concern the ability of the industry to develop mines and of the transportation industry to ship the coal. In the longer-term, questions can be raised regarding the amount, the quality, and the mineability of low-sulfur bituminous coal reserves. These potential difficulties in coal supply could affect attainment of the legislative goals. If not addressed and resolved in a timely fashion, the results could be a higher cost to meeting legislative goals and/or a longer time required to meet them.

Klein, D.E.

1983-06-01T23:59:59.000Z

282

Current and Future Carbon Budgets of Tropical Rain Forest: A Cross Scale Analysis. Final Report  

SciTech Connect

The goal of this project was to make a first assessment of the major carbon stocks and fluxes and their climatic determinants in a lowland neotropical rain forest, the La Selva Biological Station, Costa Rica. Our research design was based on the concurrent use of several of the best available approaches, so that data could be cross-validated. A major focus of our effort was to combine meteorological studies of whole-forest carbon exchange (eddy flux), with parallel independent measurements of key components of the forest carbon budget. The eddy flux system operated from February 1998 to February 2001. To obtain field data that could be scaled up to the landscape level, we monitored carbon stocks, net primary productivity components including tree growth and mortality, litterfall, woody debris production, root biomass, and soil respiration in a series of replicated plots stratified across the major environmental gradients of the forest. A second major focus of this project was on the stocks and changes of carbon in the soil. We used isotope studies and intensive monitoring to investigate soil organic stocks and the climate-driven variation of soil respiration down the soil profile, in a set of six 4m deep soil shafts stratified across the landscape. We measured short term tree growth, climate responses of sap flow, and phenology in a suite of ten canopy trees to develop individual models of tree growth to daytime weather variables.

Oberbauer, S. F.

2004-01-16T23:59:59.000Z

283

Maps for currents and anomalies in noncommutative gauge theories  

E-Print Network (OSTI)

We derive maps relating currents and their divergences in non-abelian U(N) noncommutative gauge theory with the corresponding expressions in the ordinary (commutative) description. For the U(1) theory, in the slowly-varying-field approximation, these maps are also seen to connect the star-gauge-covariant anomaly in the noncommutative theory with the standard Adler--Bell--Jackiw anomaly in the commutative version. For arbitrary fields, derivative corrections to the maps are explicitly computed up to O(\\theta^2).

Rabin Banerjee; Kuldeep Kumar

2005-04-13T23:59:59.000Z

284

Rapid Thermalization by Baryon Injection in Gauge/Gravity Duality  

E-Print Network (OSTI)

Using the AdS/CFT correspondence for strongly coupled gauge theories, we calculate thermalization of mesons caused by a time-dependent change of a baryon number chemical potential. On the gravity side, the thermalization corresponds to a horizon formation on the probe flavor brane in the AdS throat. Since heavy ion collisions are locally approximated by a sudden change of the baryon number chemical potential, we discuss implication of our results to RHIC and LHC experiments, to find a rough estimate of rather rapid thermalization time-scale t_{th} < 1 [fm/c]. We also discuss universality of our analysis against varying gauge theories.

Koji Hashimoto; Norihiro Iizuka; Takashi Oka

2011-08-26T23:59:59.000Z

285

QJT as a Regularization: Origin of the New Gauge Anomalies  

E-Print Network (OSTI)

QJT is considered as a regularization of QFT, where the fields are replaced by finite $p$-jets. The regularized phase space is infinite-dimensional, because not all histories are determined by initial conditions. Gauge symmetries are not fully preserved by the regularization, and gauge anomalies arise. These anomalies are of a new type, not present in QFT. They generically diverge when the regulator is removed, but can be made finite with a particular choice of field content, provided that spacetime has at most four dimensions. The field content appears to include unphysical fields that violate the spin-statistics theorem.

T. A. Larsson

2009-05-25T23:59:59.000Z

286

Gauge theories on a 2+2 anisotropic lattice  

Science Journals Connector (OSTI)

The implementation of gauge theories on a four-dimensional anisotropic lattice with two distinct lattice spacings is discussed, with special attention to the case where two axes are finely and two axes are coarsely discretized. Feynman rules for the Wilson gauge action are derived and the renormalizability of the theory and the recovery of the continuum limit are analyzed. The calculation of the gluon propagator and the restoration of Lorentz invariance in on-shell states is presented to one-loop order in lattice perturbation theory for SU(Nc) on both 2+2 and 3+1 lattices.

Giuseppe Burgio; Alessandra Feo; Mike Peardon; Sinéad M. Ryan ((TrinLat Collaboration))

2003-06-04T23:59:59.000Z

287

Gauge and Higgs Boson Masses from an Extra Dimension  

E-Print Network (OSTI)

We present novel calculations of the mass hierarchy of the $SU(2)$ pure gauge theory on a space-time lattice with an orbifolded fifth dimension. This theory has three parameters; the gauge coupling $\\beta$, the anisotropy $\\gamma$, which is a measure of the ratio of the lattice spacing in the four dimensions to that in the fifth dimension, and the extent of the extra dimension $N_{5}$. Using a large basis of scalar and vector operators we explore in detail the spectrum along the $\\gamma = 1$ line, and for the first time we investigate the spectrum for $\\gamma \

Graham Moir; Peter Dziennik; Nikos Irges; Francesco Knechtli; Kyoko Yoneyama

2014-11-03T23:59:59.000Z

288

Dirac monopoles on Kerr black holes: comparing gauges  

E-Print Network (OSTI)

We update our previous work on the description of twisted configurations for complex massless scalar field on the Kerr black holes as the sections of complex line bundles over the Kerr black hole topology. From physical point of view the appearance of twisted configurations is linked with the natural presence of Dirac monopoles that arise as connections in the above line bundles. We consider their description in the gauge inequivalent to the one studied previously and discuss a row of new features appearing in this gauge.

Yu. P. Goncharov

1998-11-17T23:59:59.000Z

289

Gauge Invariant Effective Stress-Energy Tensors for Gravitational Waves  

E-Print Network (OSTI)

It is shown that if a generalized definition of gauge invariance is used, gauge invariant effective stress-energy tensors for gravitational waves and other gravitational perturbations can be defined in a much larger variety of circumstances than has previously been possible. In particular it is no longer necessary to average the stress-energy tensor over a region of spacetime which is larger in scale than the wavelengths of the waves and it is no longer necessary to restrict attention to high frequency gravitational waves.

Paul R. Anderson

1996-09-09T23:59:59.000Z

290

Gauge and Higgs Boson Masses from an Extra Dimension  

E-Print Network (OSTI)

We present novel calculations of the mass hierarchy of the $SU(2)$ pure gauge theory on a space-time lattice with an orbifolded fifth dimension. This theory has three parameters; the gauge coupling $\\beta$, the anisotropy $\\gamma$, which is a measure of the ratio of the lattice spacing in the four dimensions to that in the fifth dimension, and the extent of the extra dimension $N_{5}$. Using a large basis of scalar and vector operators we explore in detail the spectrum along the $\\gamma = 1$ line, and for the first time we investigate the spectrum for $\\gamma \

Moir, Graham; Irges, Nikos; Knechtli, Francesco; Yoneyama, Kyoko

2014-01-01T23:59:59.000Z

291

Muon g-2 Anomaly and Dark Leptonic Gauge Boson  

SciTech Connect

One of the major motivations to search for a dark gauge boson of MeV-GeV scale is the long-standing muon g-2 anomaly. Because of active searches such as fixed target experiments and rare meson decays, the muon g-2 favored parameter region has been rapidly reduced. With the most recent data, it is practically excluded now in the popular dark photon model. We overview the issue and investigate a potentially alternative model based on the gauged lepton number or U(1)_L, which is under different experimental constraints.

Lee, Hye-Sung [W& M

2014-11-01T23:59:59.000Z

292

Janis-Newman algorithm: simplifications and gauge field transformation  

E-Print Network (OSTI)

The Janis-Newman algorithm is an old but very powerful tool to generate rotating solutions from static ones through a set of complex coordinate transformations. Several solutions have been derived in this way, including solutions with gauge fields. However, the transformation of the latter was so far always postulated as an ad hoc result. In this paper we propose a generalization of the procedure, extending it to the transformation of the gauge field. We also present a simplification of the algorithm due to G. Giampieri. We illustrate our prescription on the Kerr-Newman solution.

Harold Erbin

2015-02-16T23:59:59.000Z

293

N=2 gauge theories and degenerate fields of Toda theory  

SciTech Connect

We discuss the correspondence between degenerate fields of the W{sub N} algebra and punctures of Gaiotto's description of the Seiberg-Witten curve of N=2 superconformal gauge theories. Namely, we find that the type of degenerate fields of the W{sub N} algebra, with null states at level one, is classified by Young diagrams with N boxes, and that the singular behavior of the Seiberg-Witten curve near the puncture agrees with that of W{sub N} generators. We also find how to translate mass parameters of the gauge theory to the momenta of the Toda theory.

Kanno, Shoichi; Matsuo, Yutaka; Shiba, Shotaro [Department of Physics, Faculty of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan); Tachikawa, Yuji [School of Natural Sciences, Institute for Advanced Study, Princeton, New Jersey 08540 (United States)

2010-02-15T23:59:59.000Z

294

New States of Gauge Theories on a Circle  

E-Print Network (OSTI)

We study a one-dimensional large-N U(N) gauge theory on a circle as a toy model of higher dimensional Yang-Mills theories at finite temperature. To investigate the profile of the thermodynamical potential in this model, we evaluate a stochastic time evolution of several states, and find that an unstable confinement phase at high temperature does not decay to a stable deconfinement phase directly. Before it reaches the deconfinement phase, it develops to several intermediate states. These states are characterised by the expectation values of the Polyakov loop operators, which wind the temporal circle different times. We reveal that these intermediate states are the saddle point solutions of the theory, and similar solutions exist in a wide class of SU(N) and U(N) gauge theories on S^1 including QCD and pure Yang-Mills theories in various dimensions. We also consider a Kaluza-Klein gravity, which is the gravity dual of the one-dimensional gauge theory on a spatial S^1, and show that these solutions may be related to multi black holes localised on the S^1. Then we present a connection between the stochastic time evolution of the gauge theory and the dynamical decay process of a black string though the Gregory-Laflamme instability.

Takehiro Azuma; Takeshi Morita; Shingo Takeuchi

2012-07-13T23:59:59.000Z

295

CP and other gauge symmetries in string theory  

Science Journals Connector (OSTI)

We argue that CP is a gauge symmetry in string theory. As a consequence, CP cannot be explicitly broken either perturbatively or nonperturbatively; there can be no nonperturbative CP-violating parameters. String theory is thus an example of a theory where all ? angles arise due to spontaneous CP violation, and are in principle calculable.

Michael Dine; Robert G. Leigh; Douglas A. MacIntire

1992-10-05T23:59:59.000Z

296

Vacuum stability of asymptotically safe gauge-Yukawa theories  

E-Print Network (OSTI)

We study the phase diagram and the stability of the ground state for certain four-dimensional gauge-Yukawa theories whose high-energy behaviour is controlled by an interacting fixed point. We also provide analytical and numerical results for running couplings, their crossover scales, the separatrix, and the Coleman-Weinberg effective potential. Classical and quantum stability of the vacuum is established.

Litim, Daniel F; Sannino, Francesco

2015-01-01T23:59:59.000Z

297

138 Industrial Productivity Spinoff 2009 Gauging Systems Monitor Cryogenic Liquids  

E-Print Network (OSTI)

138 Industrial Productivity Spinoff 2009 Gauging Systems Monitor Cryogenic Liquids originating propellants like liquid hydrogen and oxygen at cryogenic temperatures (below -243 °F) is crucial for space) tanks. The Agency has used these cryogenic fluids for vehicle propellants, reactants, and life support

298

Dimension-5 operators in a Gauge Mediated Supersymmetry Breaking Model  

E-Print Network (OSTI)

We study the novel features in a model with Gauge Mediated Supersymmetry Breaking. If the messenger fields have positive R-parity, there will be new sources of flavor violations. We show that the dimension-5 operators will be quite important. When dressing these operators by wino-loops, the constraints on them by the present data are given.

Da-Xin Zhang

2004-12-28T23:59:59.000Z

299

Quantization of gauge theories with linearly dependent generators  

Science Journals Connector (OSTI)

The quantization rules for gauge theories with open algebras are generalized to the case of linearly dependent generators. The given zero-eigenvalue eigenvectors of the generators may also be linearly dependent and possess zero-eigenvalue eigenvectors which may also be linearly dependent and so on. We give the solution for the general case of such a hierarchy.

I. A. Batalin and G. A. Vilkovisky

1983-11-15T23:59:59.000Z

300

Wilson lines and gauge invariant off-shell amplitudes  

E-Print Network (OSTI)

We study matrix elements of Fourier-transformed straight infinite Wilson lines as a way to calculate gauge invariant tree-level amplitudes with off-shell gluons. The off-shell gluons are assigned "polarization vectors" which (in the Feynman gauge) are transverse to their off-shell momenta and define the direction of the corresponding Wilson line operators. The infinite Wilson lines are first regularized to prove the correctness of the method. We have implemented the method in a computer FORM program that can calculate gluonic matrix elements of Wilson line operators automatically. In addition we formulate the Feynman rules that are convenient in certain applications, e.g. proving the Ward identities. Using both the program and the Feynman rules we calculate a few examples, in particular the matrix elements corresponding to gauge invariant $g^{*}g^{*}g^{*}g$ and $g^{*}g^{*}g^{*}g^{*}g$ processes. An immediate application of the approach is in the high energy scattering, as in a special kinematic setup our results reduce to the form directly related to Lipatov's vertices. Thus the results we present can be directly transformed into Lipatov's vertices, in particular into $RRRP$ and $RRRRP$ vertices with arbitrary "orientation" of reggeized gluons. Since the formulation itself is not restricted to high-energy scattering, we also apply the method to a decomposition of an ordinary on-shell amplitude into a set of gauge invariant objects.

Piotr Kotko

2014-03-19T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

E-Print Network 3.0 - abelian lattice gauge Sample Search Results  

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

Search Sample search results for: abelian lattice gauge Page: << < 1 2 3 4 5 > >> 1 Ising lattice gauge theory and confinement Summary: Ujk Ukl Uli 12;Beyond Ising (Z2)...

302

Meson spectra of asymptotically free gauge theories from holography  

E-Print Network (OSTI)

Using holography, we study the low-lying mesonic spectrum of a range of asymptotically free gauge theories. First we revisit a simple top-down holographic model of QCD-like dynamics with predictions in the M_rho-M_pi plane. The meson masses in this model are in very good agreement with lattice gauge theory calculations in the quenched approximation. We show that the key ingredient for the meson mass predictions is the running of the anomalous dimension of the quark condensate, gamma. This provides an explanation for the agreement of holographic and quenched lattice gauge theory calculations. We then study the `Dynamic AdS/QCD model' in which the gauge theory dynamics is included by a choice for the running of gamma. We use the naive two-loop perturbative running of the gauge coupling extrapolated to the non-perturbative regime to estimate the running of gamma across a number of theories. We consider models with quarks in the fundamental, adjoint, two-index symmetric and two-index anti-symmetric representations. We display predictions for M_rho, M_pi, M_sigma and the lightest glueball mass. Many of these theories, where the contribution to the running of gamma is dominated by the gluons, give very similar spectra, which also match with lattice expectations for QCD. On the other hand, a significant difference between spectra in different holographic models is seen for theories where the quark content changes the gradient of the running of gamma around the scale at which chiral symmetry breaking is triggered at gamma approximately 1. For these walking theories we see an enhancement of the rho-mass and a suppression of the sigma-mass. Both phenomena are characteristic for walking behaviour in the physical meson masses.

Johanna Erdmenger; Nick Evans; Marc Scott

2014-12-10T23:59:59.000Z

303

The step free-energy and the behaviour at the roughening transition of lattice gauge theories  

E-Print Network (OSTI)

653 The step free-energy and the behaviour at the roughening transition of lattice gauge theories J expansion of 3-D and 4-D Z2 gauge theories, and analyse its vanishing at the roughening transition. Our. Introduction. - It has recently been realized that lattice gauge theories experience a roughening transition [1

Paris-Sud XI, Université de

304

A proposal for a manifestly gauge invariant and universal calculus in Yang-Mills theory  

Science Journals Connector (OSTI)

We uncover a method of calculation that proceeds at every step without fixing the gauge or specifying details of the regularization scheme. Results are obtained by iterated use of integration by parts and gauge invariance identities. The initial stages can even be computed diagrammatically. The method is formulated within the framework of an exact renormalization group for SU(N) Yang-Mills gauge theory, incorporating an effective cutoff through a manifest spontaneously broken SU(N|N) gauge invariance. We demonstrate the technique with a compact calculation of the one-loop beta function, achieving a manifestly universal result, and without gauge fixing, for the first time at finite N.

Stefano Arnone; Antonio Gatti; Tim R. Morris

2003-04-14T23:59:59.000Z

305

Micrometeorology of a Tropical Rainforest Before and After Selective Logging Scott Miller (sdmiller@uci.edu), Mike Goulden, Mary Menton, Ed Read, Rob Elliot, University of California, Irvine  

E-Print Network (OSTI)

dioxide exchange, they possibly act as chimneys with preferential venting of CO2 that may not be dectected (up/down) LiCor Solar Radiation Kipp & Zonen Net Radiation REBS Q*7 Rain Tipping Bucket PRE

Goulden, Michael L.

306

CALIBRATION OF WIRE-LIKE MANGANIN GAUGES FOR USE IN PLANAR SHOCK-WAVE EXPERIMENTS  

SciTech Connect

Piezoresistive gauges have been used extensively for many decades as in-material stress transducers during shock wave experiments. Manganin demonstrates a high piezoresistive response which is relatively temperature independent. As such manganin gauges have been widely calibrated by many authors for use during shock-wave experiments. The precise calibration has been demonstrated to depend on both the chemical composition and mechanical history of the manganin, and on the geometry of the gauge. The research presented in this paper refers to the calibration of a commercially available manganin gauge, Micro-measurements J2M-SS-580SF-025, generally referred to as the T-gauge owing to its geometry. The T-gauge has seen widespread use as a pressure transducer to measure lateral stress during plate-impact experiments. It has been previously proposed that T-gauges have a similar response to the grid foil-like manganin gauges extensively calibrated by Rosenberg et al. However, recently it has been suggested that they in fact behave in a wire-like manner. The results presented here demonstrate that the gauges' behaviour is wire-like when mounted to measure longitudinal stress. A modified calibration can be applied successfully to convert the relative resistance change to the stress normal to the gauge element. These results have important ramifications for the reduction of lateral stress measurements previously made using the T-gauge.

Chapman, David J.; Braithwaite, Christopher H.; Proud, William G. [Fracture and Shock Physics, SMF Group, Cavendish Laboratory, J. J. Thomson Ave., Cambridge, CB3 0HE (United Kingdom)

2009-12-28T23:59:59.000Z

307

Gauging Improvements in Urban Building Energy Policy in India  

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

Gauging Improvements in Urban Gauging Improvements in Urban Building Energy Policy in India Christopher Williams and Mark Levine China Energy Group Environmental Energy Technologies Division Lawrence Berkeley National Laboratory Preprint version of paper for conference proceedings, ACEEE Summer Study on Energy Efficiency in Buildings, Pacific Grove, California, August 12-17, 2012. June 2012 This work was supported by the U.S. Department of Energy under Contract No. DE- AC02-05CH11231. ERNEST ORLANDO LAWRENCE BERKELEY NATIONAL LABORATORY LBNL-5577E Disclaimer This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any

308

Revisiting Noether gauge symmetry approach in quintom cosmology  

E-Print Network (OSTI)

The Noether gauge symmetry approach is revisited to study various quintom scenarios (those that arise by the presence of two dynamical scalar fields) to comprehend the role of dark energy in our universe. For such models, we obtain smooth parameterizations of the equation of state of dark energy across the boundary of cosmological constant $w_{\\Lambda}=-1$. This study gives rise to two new cases of the potential $V(\\phi, \\sigma)$, due to a quintom field in which nonlinear coupling of the scalar fields arise. Besides we report that a few cases of Noether gauge symmetries and their invariants in [Adnan Aslam, et. al., Astrophys Space Sci (2013), 348:533-540] are incorrect. Consequently, the given cosmological model in their paper is not a feasible quintom model.

Ali, Sajid

2015-01-01T23:59:59.000Z

309

Tensor networks for Lattice Gauge Theories and Atomic Quantum Simulation  

E-Print Network (OSTI)

We show that gauge invariant quantum link models, Abelian and non-Abelian, can be exactly described in terms of tensor networks states. Quantum link models represent an ideal bridge between high-energy to cold atom physics, as they can be used in cold-atoms in optical lattices to study lattice gauge theories. In this framework, we characterize the phase diagram of a (1+1)-d quantum link version of the Schwinger model in an external classical background electric field: the quantum phase transition from a charge and parity ordered phase with non-zero electric flux to a disordered one with a net zero electric flux configuration is described by the Ising universality class.

E. Rico; T. Pichler; M. Dalmonte; P. Zoller; S. Montangero

2014-06-07T23:59:59.000Z

310

Holledge gauge failure testing using concurrent information processing algorithm  

SciTech Connect

For several decades, computerized information processing systems and human information processing models have developed with a good deal of mutual influence. Any comprehensive psychology text in this decade uses terms that originated in the computer industry, such as ``cache`` and ``memory``, to describe human information processing. Likewise, many engineers today are using ``artificial intelligence``and ``artificial neural network`` computing tools that originated as models of human thought to solve industrial problems. This paper concerns a recently developed human information processing model, called ``concurrent information processing`` (CIP), and a related set of computing tools for solving industrial problems. The problem of focus is adaptive gauge monitoring; the application is pneumatic pressure repeaters (Holledge gauges) used to measure liquid level and density in the Defense Waste Processing Facility and the Integrated DWPF Melter System.

Weeks, G.E.; Daniel, W.E.; Edwards, R.E. [Westinghouse Savannah River Co., Aiken, SC (United States); Jannarone, R.J. [Rapid Clip Neural Systems, Inc., Atlanta, GA (United States); Joshi, S.N.; Palakodety, S.S.; Qian, D. [South Carolina Univ., Columbia, SC (United States)

1996-04-11T23:59:59.000Z

311

Thermodynamics of SU(3) gauge theory at fixed lattice spacing  

E-Print Network (OSTI)

We study thermodynamics of SU(3) gauge theory at fixed scales on the lattice, where we vary temperature by changing the temporal lattice size N_t=(Ta_t)^{-1}. In the fixed scale approach, finite temperature simulations are performed on common lattice spacings and spatial volumes. Consequently, we can isolate thermal effects in observables from other uncertainties, such as lattice artifact, renormalization factor, and spatial volume effect. Furthermore, in the EOS calculations, the fixed scale approach is able to reduce computational costs for zero temperature subtraction and parameter search to find lines of constant physics, which are demanding in full QCD simulations. As a test of the approach, we study the thermodynamics of the SU(3) gauge theory on isotropic and anisotropic lattices. In addition to the equation of state, we calculate the critical temperature and the static quark free energy at a fixed scale.

T. Umeda; S. Ejiri; S. Aoki; T. Hatsuda; K. Kanaya; Y. Maezawa; H. Ohno

2008-10-09T23:59:59.000Z

312

LHC constraints on gauge boson couplings to dark matter  

E-Print Network (OSTI)

Collider searches for energetic particles recoiling against missing transverse energy allow to place strong bounds on the interactions between dark matter (DM) and standard model particles. In this article we update and extend LHC constraints on effective dimension-7 operators involving DM and electroweak gauge bosons. A concise comparison of the sensitivity of the mono-photon, mono-W, mono-Z, mono-W/Z, invisible Higgs-boson decays in the vector boson fusion mode and the mono-jet channel is presented. Depending on the parameter choices, either the mono-photon or the mono-jet data provide the most stringent bounds at the moment. We furthermore explore the potential of improving the current 8 TeV limits at 14 TeV. Future strategies capable of disentangling the effects of the different effective operators involving electroweak gauge bosons are discussed as well.

Crivellin, Andreas; Hibbs, Anthony

2015-01-01T23:59:59.000Z

313

Phases of N=1 Supersymmetric Chiral Gauge Theories  

SciTech Connect

We analyze the phases of supersymmetric chiral gauge theories with an antisymmetric tensor and (anti)fundamental flavors, in the presence of a classically marginal superpotential deformation. Varying the number of flavors that appear in the superpotential reveals rich infrared chiral dynamics and novel dualities. The dualities are characterized by an infinite family of magnetic duals with arbitrarily large gauge groups describing the same fixed point, correlated with arbitrarily large classical global symmetries that are truncated nonperturbatively. At the origin of moduli space, these theories exhibit a phase with confinement and chiral symmetry breaking, an interacting nonabelian Coulomb phase, and phases where an interacting sector coexists with a sector that either s-confines or is in a free magnetic phase. Properties of these intriguing 'mixed phases' are studied in detail using duality and a-maximization, and the presence of superpotential interactions provides further insights into their formation.

Craig, Nathaniel; /Princeton, Inst. Advanced Study /Rutgers U., Piscataway; Essig, Rouven; /Princeton, Inst. Advanced Study /YITP, Stony Brook /SLAC /Stanford U., Phys. Dept.; Hook, Anson; Torroba, Gonzalo; /SLAC /Stanford U., Phys. Dept.

2012-02-17T23:59:59.000Z

314

Continuum Thermodynamics of the SU(N) Gauge Theory  

E-Print Network (OSTI)

The thermodynamics of the deconfined phase of the SU(N) gauge theory is studied. Careful study is made of the approach to the continuum limit. The latent heat of the deconfinement transition is studied, for the theories with 3, 4 and 6 colors. Continuum estimates of various thermodynamic quantities are studied, and the approach to conformality investigated. The bulk thermodynamic quantities at different N are compared, to investigate the validity of 't Hooft scaling at these values of N.

Saumen Datta; Sourendu Gupta

2010-12-30T23:59:59.000Z

315

New States of Gauge Theories on a Circle  

E-Print Network (OSTI)

We study a one-dimensional large-N U(N) gauge theory on a circle as a toy model of higher dimensional Yang-Mills theories at finite temperature. To investigate the profile of the thermodynamical potential in this model, we evaluate a stochastic time evolution of several states, and find that an unstable confinement phase at high temperature does not decay to a stable deconfinement phase directly. Before it reaches the deconfinement phase, it develops to several intermediate states. These states are characterised by the expectation values of the Polyakov loop operators, which wind the temporal circle different times. We reveal that these intermediate states are the saddle point solutions of the theory, and similar solutions exist in a wide class of SU(N) and U(N) gauge theories on S^1 including QCD and pure Yang-Mills theories in various dimensions. We also consider a Kaluza-Klein gravity, which is the gravity dual of the one-dimensional gauge theory on a spatial S^1, and show that these solutions may be relat...

Azuma, Takehiro; Takeuchi, Shingo

2012-01-01T23:59:59.000Z

316

Covariant phase space, constraints, gauge and the Peierls formula  

E-Print Network (OSTI)

It is well known that both the symplectic structure and the Poisson brackets of classical field theory can be constructed directly from the Lagrangian in a covariant way, without passing through the non-covariant canonical Hamiltonian formalism. This is true even in the presence of constraints and gauge symmetries. These constructions go under the names of the covariant phase space formalism and the Peierls bracket. We review both of them, paying more careful attention, than usual, to the precise mathematical hypotheses that they require, illustrating them in examples. Also an extensive historical overview of the development of these constructions is provided. The novel aspect of our presentation is a significant expansion and generalization of an elegant and quite recent argument by Forger & Romero showing the equivalence between the resulting symplectic and Poisson structures without passing through the canonical Hamiltonian formalism as an intermediary. We generalize it to cover theories with constraints and gauge symmetries and formulate precise sufficient conditions under which the argument holds. These conditions include a local condition on the equations of motion that we call hyperbolizability, and some global conditions of cohomological nature. The details of our presentation may shed some light on subtle questions related to the Poisson structure of gauge theories and their quantization.

Igor Khavkine

2014-02-07T23:59:59.000Z

317

Superfluid and Metamagnetic Phase Transitions in $?$-deformed Gauged Supergravity  

E-Print Network (OSTI)

We study non-supersymmetric truncations of $\\omega$-deformed ${\\cal N}=8$ gauged supergravity that retain a $U(1)$ gauge field and three scalars, of which two are neutral and one charged. We construct dyonic domain-wall and black hole solutions with AdS$_4$ boundary conditions when only one (neutral) scalar is non-vanishing, and examine their behavior as the magnetic field and temperature of the system are varied. In the infrared the domain-wall solutions approach either dyonic AdS$_2 \\times \\mathbb{R}^2$ or else Lifshitz-like, hyperscaling violating geometries. The scaling exponents of the latter are $z=3/2$ and $\\theta = -2$, and are independent of the $\\omega$-deformation. New $\\omega$-dependent AdS$_4$ vacua are also identified. We find a rich structure for the magnetization of the system, including a line of metamagnetic first-order phase transitions when the magnetic field lies in a particular range. Such transitions arise generically in the $\\omega$-deformed theories. Finally, we study the onset of a superfluid phase by allowing a fluctuation of the charged scalar field to condense, spontaneously breaking the abelian gauge symmetry. The mechanism by which the superconducting instability ceases to exist for strong magnetic fields is different depending on whether the field is positive or negative. Finally, such instabilities are expected to compete with spatially modulated phases.

Sera Cremonini; Yi Pang; C. N. Pope; Junchen Rong

2014-10-31T23:59:59.000Z

318

Testing numerical relativity with the shifted gauge wave  

E-Print Network (OSTI)

Computational methods are essential to provide waveforms from coalescing black holes, which are expected to produce strong signals for the gravitational wave observatories being developed. Although partial simulations of the coalescence have been reported, scientifically useful waveforms have so far not been delivered. The goal of the AppleswithApples (AwA) Alliance is to design, coordinate and document standardized code tests for comparing numerical relativity codes. The first round of AwA tests have now being completed and the results are being analyzed. These initial tests are based upon periodic boundary conditions designed to isolate performance of the main evolution code. Here we describe and carry out an additional test with periodic boundary conditions which deals with an essential feature of the black hole excision problem, namely a non-vanishing shift. The test is a shifted version of the existing AwA gauge wave test. We show how a shift introduces an exponentially growing instability which violates the constraints of a standard harmonic formulation of Einstein's equations. We analyze the Cauchy problem in a harmonic gauge and discuss particular options for suppressing instabilities in the gauge wave tests. We implement these techniques in a finite difference evolution algorithm and present test results. Although our application here is limited to a model problem, the techniques should benefit the simulation of black holes using harmonic evolution codes.

Maria C. Babiuc; Bela Szilagyi; Jeffrey Winicour

2005-11-29T23:59:59.000Z

319

Probing the Gauge Structure of high-temperature superconductors  

E-Print Network (OSTI)

We suggest that a spin-charge separating ansatz, leading to non-Abelian $SU(2) \\otimes U_S(1)$ gauge symmetries in doped antiferromagnets, proposed earlier as a way of describing Kosterlitz-Thouless superconducting gaps at the nodes of the gap of d-wave (high-T_c) superconductors, may also lead to a pseudogap phase, characterised by the formation of (non-superconducting) pairing and the absence of phase coherence. The crucial assumption is again the presence of electrically charged Dirac fermionic excitations (holons) about the points of the (putative) fermi surface in the pertinent phase of the superconductor. We present arguments in support of the r\\^ole of non-perturbative effects (instantons) on the onset of the pseudogap phase. As a means of probing such gauge interactions experimentally, we perform a study of the scaling of the thermal conductivity with an externally-applied magnetic field, in certain effective models involving gauge and/or four-fermion (contact) interactions.

K. Farakos; G. Koutsoumbas; N. E. Mavromatos

1998-05-29T23:59:59.000Z

320

A condensed matter interpretation of SM fermions and gauge fields  

E-Print Network (OSTI)

We present the bundle Aff(3) x C x /(R^3), with a geometric Dirac equation on it, as a three-dimensional geometric interpretation of the SM fermions. Each C x /(R^3) describes an electroweak doublet. The Dirac equation has a doubler-free staggered spatial discretization on the lattice space Aff(3) x C (Z^3). This space allows a simple physical interpretation as a phase space of a lattice of cells in R^3. We find the SM SU(3)_c x SU(2)_L x U(1)_Y action on Aff(3) x C x /(R^3) to be a maximal anomaly-free special gauge action preserving E(3) symmetry and symplectic structure, which can be constructed using two simple types of gauge-like lattice fields: Wilson gauge fields and correction terms for lattice deformations. The lattice fermion fields we propose to quantize as low energy states of a canonical quantum theory with Z_2-degenerated vacuum state. We construct anticommuting fermion operators for the resulting Z_2-valued (spin) field theory. A metric theory of gravity compatible with this model is presented too.

I. Schmelzer

2009-08-05T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

The Nature of the Vector and Scalar Potentials and Gauge Invariance in the Context of Gauge Theory  

E-Print Network (OSTI)

Modern undergraduate textbooks in electricity and magnetism typically focus on a force representation of electrodynamics with an emphasis on Maxwell's Equations and the Lorentz Force Law. The vector potential $\\mathbf{A}$ and scalar potential $\\Phi$ play a secondary role mainly as quantities used to calculate the electric and magnetic fields. However, quantum mechanics including quantum electrodynamics (QED) and other gauge theories demands a potential ($\\Phi$,$\\mathbf{A}$) oriented representation where the potentials are the more fundamental quantities. Here, we help bridge that gap by showing that the homogeneous Maxwell's equations together with the Lorentz Force Law can be derived from assuming that the potentials represent potential energy and momentum per unit charge. Furthermore, we enumerate the additional assumptions that are needed to derive the inhomogeneous Maxwell's equations. As part of this work we demonstrate the physical nature and importance of gauge invariance.

T. Stein

2008-07-14T23:59:59.000Z

322

A Bicycle Built for Two: The Galilean and U(1) Gauge Invariance of the Schrödinger Field  

E-Print Network (OSTI)

This paper undertakes a study of the nature of the force associated with the local U (1) gauge symmetry of a non-relativistic quantum particle. To ensure invariance under local U (1) symmetry, a matter field must couple to a gauge field. We show that such a gauge field necessarily satisfies the Maxwell equations, whether the matter field coupled to it is relativistic or non-relativistic. This result suggests that the structure of the Maxwell equations is determined by gauge symmetry rather than the symmetry transformation properties of space-time. In order to assess the validity of this notion, we examine the transformation properties of the coupled matter and gauge fields under Galilean transformations. Our main technical result is the Galilean invariance of the full equations of motion of the U (1) gauge field.

V. Colussi; S. Wickramasekara

2008-03-04T23:59:59.000Z

323

Holomorphic Anomaly in Gauge Theory on ALE space  

E-Print Network (OSTI)

We consider four-dimensional Omega-deformed N=2 supersymmetric SU(2) gauge theory on A1 space and its lift to five dimensions. We find that the partition functions can be reproduced via special geometry and the holomorphic anomaly equation. Schwinger type integral expressions for the boundary conditions at the monopole/dyon point in moduli space are inferred. The interpretation of the five-dimensional partition function as the partition function of a refined topological string on A1x(local P1xP1) is suggested.

Daniel Krefl; Sheng-Yu Darren Shih

2011-12-12T23:59:59.000Z

324

Holomorphic Anomaly in Gauge Theory on ALE space  

E-Print Network (OSTI)

We consider four-dimensional Omega-deformed N=2 supersymmetric SU(2) gauge theory on A1 space and its lift to five dimensions. We find that the partition functions can be reproduced via special geometry and the holomorphic anomaly equation. Schwinger type integral expressions for the boundary conditions at the monopole/dyon point in moduli space are inferred. The interpretation of the five-dimensional partition function as the partition function of a refined topological string on A1x(local P1xP1) is suggested.

Krefl, Daniel

2011-01-01T23:59:59.000Z

325

Finite Temperature Sum Rules in Lattice Gauge Theory  

E-Print Network (OSTI)

We derive non-perturbative sum rules in SU($N$) lattice gauge theory at finite temperature. They relate the susceptibilities of the trace anomaly and energy-momentum tensor to temperature derivatives of the thermodynamic potentials. Two of them have been derived previously in the continuum and one is new. In all cases, at finite latttice spacing there are important corrections to the continuum sum rules that are only suppressed by the bare coupling $g_0^2$. We also show how the discretization errors affecting the thermodynamic potentials can be controlled by computing these susceptibilities.

Harvey B. Meyer

2007-11-05T23:59:59.000Z

326

A Maxwell's equations, Coulomb gauge analysis of two scatterers  

E-Print Network (OSTI)

for Wedges (P, g 180') Page 31 36 vn LIST OF FIGURES Figure 1. 2. 3. 5. 6. 7. 8. 9 - 10. Geometry for a scatterer in the presence of a wedge of angle Po Straight wire segmentation scheme Segmentation scheme for scatterer in wedge geometry... = IGk. 4xA 0 0 1 (33) The S?? factors in (31) are obtained from (23). In the limit as 8 approaches zero, lim S??= 1 (34) lim S?? R 0 0, u g v, (35) so the vector potential Green's functions for each gauge condition behave the same...

Crowell, Kelly Jean

2012-06-07T23:59:59.000Z

327

The physical observer II: Gauge and diff anomalies  

E-Print Network (OSTI)

In a companion paper we studied field theory in the presence of a physical observer with quantum dynamics. Here we describe the most striking consequence of this assumption: new gauge and diff anomalies arise. The relevant cocycles depend on the observer's spacetime trajectory and can hence not appear in QFT, where this quantity is never introduced. Diff anomalies necessarily arise in every locally nontrivial, non-holographic theory of quantum gravity. Cancellation of the divergent parts of the anomalies only works if spacetime has four dimensions.

T. A. Larsson

2008-11-06T23:59:59.000Z

328

Gauge-Invariant Temperature Anisotropies and Primordial Non-Gaussianity  

Science Journals Connector (OSTI)

We provide the gauge-invariant expression for large-scale cosmic microwave background temperature fluctuations at second-order perturbation theory. This enables us to define unambiguously the nonlinearity parameter fNL, which is used by experimental collaborations to pin down the level of non-Gaussianity in the temperature fluctuations. Furthermore, it contains a primordial term encoding all the information about the non-Gaussianity generated at primordial epochs and about the mechanism which gave rise to cosmological perturbations, thus neatly disentangling the primordial contribution to non-Gaussianity from the one caused by the postinflationary evolution.

Nicola Bartolo; Sabino Matarrese; Antonio Riotto

2004-12-01T23:59:59.000Z

329

PDF uncertainties at large x and gauge boson production  

SciTech Connect

I discuss how global QCD fits of parton distribution functions can make the somewhat separated fields of high-energy particle physics and lower energy hadronic and nuclear physics interact to the benefit of both. In particular, I will argue that large rapidity gauge boson production at the Tevatron and the LHC has the highest short-term potential to constrain the theoretical nuclear corrections to DIS data on deuteron targets necessary for up/down flavor separation. This in turn can considerably reduce the PDF uncertainty on cross section calculations of heavy mass particles such as W' and Z' bosons.

Accardi, Alberto [Hampton U., JLAB

2012-10-01T23:59:59.000Z

330

E-Print Network 3.0 - abelian 2-form gauge Sample Search Results  

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

of Mathematics, University of California at Santa Barbara Collection: Mathematics 31 Ising lattice gauge theory and confinement Summary: Ujk Ukl Uli 12;Beyond Ising (Z2)...

331

E-Print Network 3.0 - algebra gauge theory Sample Search Results  

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

P. - Physics Department, University of California at Santa Cruz Collection: Physics 2 Ising lattice gauge theory and confinement Summary: * P x y n 1, 3 satisfy usual Pauli...

332

CP and T violation in non-perturbative chiral gauge theories  

E-Print Network (OSTI)

We give a completely general derivation revealing the precise origin and the quantitative effects of CP and T violations in chiral gauge theories on the lattice.

Werner Kerler

2005-04-06T23:59:59.000Z

333

Standard Model-like D-brane models and gauge couplings  

E-Print Network (OSTI)

We systematically search intersecting D-brane models, which just realize the Standard Model chiral matter contents and gauge symmetry. We construct new classes of non-supersymmetric Standard Model-like models. We also study gauge coupling constants of these models. The tree level gauge coupling is a function of compactification moduli, string scale, string coupling and winding number of D-branes. By tuning them, we examine whether the models can explain the experimental values of gauge couplings. As a result, we find that the string scale should be greater than $10^{14-15}$GeV if the compactification scale and the string scale are the same order.

Hamada, Yuta; Uemura, Shohei

2014-01-01T23:59:59.000Z

334

Quantized topological terms in weakly coupled gauge theories and their connection to symmetry protected topological phases  

E-Print Network (OSTI)

We consider a weakly coupled gauge theory where charged particles all have large gaps (ie no Higgs condensation to break the gauge "symmetry") and the field strength fluctuates only weakly. We ask what kind of topological terms can be added to the Lagrangian of such a weakly coupled gauge theory. In this paper, we systematically construct quantized topological terms which are generalization of the Chern-Simons terms and $F\\wedge F$ terms, in space-time dimensions $d$ and for any gauge groups (continuous or discrete), using each element of the topological cohomology classes $H^{d+1}(BG,\\Z)$ on the classifying space $BG$ of the gauge group $G$. In 3$d$ or for finite gauge groups above 3$d$, the weakly coupled gauge theories are gapped. So our results on topological terms can be viewed as a systematic construction of gapped topologically ordered phases of weakly coupled gauge theories. In other cases, the weakly coupled gauge theories are gapless. So our results can be viewed as an attempt to systematically cons...

Hung, Ling-Yan

2012-01-01T23:59:59.000Z

335

National Computational Infrastructure for Lattice Gauge Theory SciDAC-2 Closeout Report  

SciTech Connect

Under its SciDAC-1 and SciDAC-2 grants, the USQCD Collaboration developed software and algorithmic infrastructure for the numerical study of lattice gauge theories.

Mackenzie, Paul [Fermilab] [Fermilab; Brower, Richard [Boston University] [Boston University; Karsch, Frithjof [Brookhaven National Laboratory] [Brookhaven National Laboratory; Christ, Norman [Columbia University] [Columbia University; Gottlieb, Steven [Indiana University] [Indiana University; Negele, John [MIT] [MIT; Richards, David [Jefferson National Laboratory] [Jefferson National Laboratory; Toussaint, Doug [Univ. of Arizona] [Univ. of Arizona; Sugar, Robert [Univ. of California at Santa Barbara] [Univ. of California at Santa Barbara; DeTar, Carleton [Univ. of Utah] [Univ. of Utah; Sharpe, Stephen [Univ. of Washington] [Univ. of Washington; DiPierro, Massimo [DePaul University] [DePaul University; Sun, Xian-He [illinois institute of Technology] [illinois institute of Technology; Fowler, Rob [University of North Carolina] [University of North Carolina; Dubey, Abhishek [Vanderbilt University] [Vanderbilt University

2013-07-19T23:59:59.000Z

336

Standard Model-like D-brane models and gauge couplings  

E-Print Network (OSTI)

We systematically search intersecting D-brane models, which just realize the Standard Model chiral matter contents and gauge symmetry. We construct new classes of non-supersymmetric Standard Model-like models. We also study gauge coupling constants of these models. The tree level gauge coupling is a function of compactification moduli, string scale, string coupling and winding number of D-branes. By tuning them, we examine whether the models can explain the experimental values of gauge couplings. As a result, we find that the string scale should be greater than $10^{14-15}$GeV if the compactification scale and the string scale are the same order.

Yuta Hamada; Tatsuo Kobayashi; Shohei Uemura

2014-09-09T23:59:59.000Z

337

E-Print Network 3.0 - anomalous neutral gauge Sample Search Results  

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

to the electroweak gauge boson quartic couplings, growing quadratically with the Higgs boson mass, is reviewed... . The potential of the CERN Large Hadron Collider and e+ e-...

338

E-Print Network 3.0 - anomalous triple gauge Sample Search Results  

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

to the electroweak gauge boson quartic couplings, growing quadratically with the Higgs boson mass, is reviewed... . The potential of the CERN Large Hadron Collider and e+ e-...

339

Microbial Fuel Cells -Solar Times http://solar.rain-barrel.net/microbial-fuel-cells/ 1 of 3 6/28/2006 11:32 AM  

E-Print Network (OSTI)

.com Hydrogen Fuel Cells Buy Commercial & Educational Stacks PEM, Fuel Cell Generators & More! www.TheHydrogenCompany.com Hydrogen Fuel Cell Improve Your Fuel Economy 20 to 50% Begin Saving Fuel Now www.SaveMoreWithHydrogenMicrobial Fuel Cells - Solar Times http://solar.rain-barrel.net/microbial-fuel-cells/ 1 of 3 6

Lovley, Derek

340

Environmental radiological monitoring of air, rain, and snow on and near the Hanford Site, 1945-1957  

SciTech Connect

This report is a result of the Hanford Environmental Dose Reconstruction (HEDR) Project. The goal of the HEDR Project is to estimate the radiation dose that individuals could have received from emissions since 1944 at the Hanford Site near Richland, Washington. Members of the HEDR Project`s Environmental Monitoring Data Task have developed databases of historical environmental measurements of such emissions. Hanford documents were searched for information on the radiological monitoring of air, rain, and snow at and near the Hanford Site in Richland, Washington. The monitoring information was reviewed and summarized. The end product is a yearly overview of air, rain, and snow samples as well as ambient radiation levels in the air that were measured from 1945 through 1957. The following information is provided in each annual summary: the media sampled, the constituents (radionuclides) measured/reported, the sampling locations, the sampling frequencies, the sampling methods, and the document references. For some years a notes category is included that contains additional useful information. For the years 1948 through 1957, tables summarizing the sampling locations for the various sample media are also included in the appendix. A large number of documents were reviewed to obtain the information in this report. A reference list is attached to the end of each annual summary. All of the information summarized here was obtained from reports originating at Hanford. These reports are all publicly available and can be found in the Richland Operations Office (RL) public reading room. The information in this report has been compiled without analysis and should only be used as a guide to the original documents.

Hanf, R.W.; Thiede, M.E.

1994-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

Gauge field, strings, solitons, anomalies and the speed of life  

E-Print Network (OSTI)

It's been said that "mathematics is biology's next microscope, only better; biology is mathematics' next physics, only better". Here we aim for something even better. We try to combine mathematical physics and biology into a picoscope of life. For this we merge techniques which have been introduced and developed in modern mathematical physics, largely by Ludvig Faddeev to describe objects such as solitons and Higgs and to explain phenomena such as anomalies in gauge fields. We propose a synthesis that can help to resolve the protein folding problem, one of the most important conundrums in all of science. We apply the concept of gauge invariance to scrutinize the extrinsic geometry of strings in three dimensional space. We evoke general principles of symmetry in combination with Wilsonian universality and derive an essentially unique Landau-Ginzburg energy that describes the dynamics of a generic string-like configuration in the far infrared. We observe that the energy supports topological solitons, that pertain to an anomaly in the manner how a string is framed around its inflection points. We explain how the solitons operate as modular building blocks from which folded proteins are composed. We describe crystallographic protein structures by multi-solitons with experimental precision, and investigate the non-equilibrium dynamics of proteins under varying temperature. We simulate the folding process of a protein at in vivo speed and with close to pico-scale accuracy using a standard laptop computer: With pico-biology as mathematical physics' next pursuit, things can only get better.

Antti J. Niemi

2014-07-05T23:59:59.000Z

342

Manifestly Covariant Gauge-invariant Cosmological Perturbation Theory  

E-Print Network (OSTI)

It is shown that a first-order cosmological perturbation theory for the open, flat and closed Friedmann-Lema\\^itre-Robertson-Walker universes admits one, and only one, gauge-invariant variable which describes the perturbation to the energy density and which becomes equal to the usual Newtonian energy density in the non-relativistic limit. The same holds true for the perturbation to the particle number density. Using these two new variables, a new manifestly gauge-invariant cosmological perturbation theory has been developed. Density perturbations evolve diabatically. Perturbations in the total energy density are gravitationally coupled to perturbations in the particle number density, irrespective of the nature of the particles. There is, in first-order, no back-reaction of perturbations to the global expansion of the universe. Small-scale perturbations in the radiation-dominated era oscillate with an increasing amplitude, whereas in older, less precise treatments, oscillating perturbations are found with a decreasing amplitude. This is a completely new and, obviously, important result, since it makes it possible to explain and understand the formation of massive stars after decoupling of matter and radiation.

P. G. Miedema; W. A. van Leeuwen

2014-10-01T23:59:59.000Z

343

Non-locality and gauge freedom in Deutsch and Hayden's formulation of quantum mechanics  

E-Print Network (OSTI)

Deutsch and Hayden have proposed an alternative formulation of quantum mechanics which is completely local. We argue that their proposal must be understood as having a form of `gauge freedom' according to which mathematically distinct states are physically equivalent. Once this gauge freedom is taken into account, their formulation is no longer local.

David Wallace; Chris Timpson

2005-03-16T23:59:59.000Z

344

A loop of SU(2) gauge fields stable under the Yang-Mills flow  

E-Print Network (OSTI)

A loop of SU(2) gauge fields stable under the Yang-Mills flow Daniel Friedan Department of Physics The gradient flow of the Yang-Mills action acts pointwise on closed loops of gauge fields. We construct in perturbations of the loop. The stable loop might play a role in physics as a classical winding mode

Friedan, Daniel

345

Functions and Requirements for Automated Liquid Level Gauge Instruments in SST and DST Farms  

SciTech Connect

This functions and requirements document defines the baseline requirements and criteria for the design, purchase, fabrication, construction, installation, and operation of automated liquid level gauge instruments in the Tank Farms. This document is intended to become the technical baseline for current and future installation, operation and maintenance of automated liquid level gauges in single-shell and double-shell tank farms.

CARPENTER, K.E.

1999-08-25T23:59:59.000Z

346

Instanton calculus and SUSY gauge theories on asymptotically locally Euclidean manifolds  

Science Journals Connector (OSTI)

We study instanton effects along the Coulomb branch of an N=2 supersymmetric Yang-Mills theory with gauge group SU(2) on asymptotically locally Euclidean spaces. We focus our attention on an Eguchi-Hanson gravitational background and on gauge field configurations of the lowest Chern class.

Diego Bellisai and Gabriele Travaglini

1998-06-15T23:59:59.000Z

347

Dynamically generated electric charge distributions in Abelian projected SU(2) lattice gauge theories  

E-Print Network (OSTI)

We show in the maximal Abelian gauge the dynamical electric charge density generated by the coset fields, gauge fixing and ghosts shows antiscreening as in the case of the non-Abelian charge. We verify that with the completion of the ghost term all contributions to flux are accounted for in an exact lattice Ehrenfest relation.

A. Hart; R. W. Haymaker; Y. Sasai

1998-08-28T23:59:59.000Z

348

The Low-Energy Dynamics of N=1 SUSY Gauge Theories with Small Matter Content  

E-Print Network (OSTI)

We describe the low-energy dynamics of N=1 supersymmetric gauge theories with the Dynkin index of matter fields less than or equal to the Dynkin index of the adjoint plus two. We explain what kinds of nonperturbative phenomena take place in this class of supersymmetric gauge theories.

Witold Skiba

1998-06-10T23:59:59.000Z

349

Review of river discharge records and gauging stations in the Rwenzori Mountains of Uganda  

E-Print Network (OSTI)

Review of river discharge records and gauging stations in the Rwenzori Mountains of Uganda Richard Department Directorate of Water Development Entebbe, Uganda November 2004 Review of river discharge records and gauging stations in the Rwenzori Mountains of Uganda 1 #12;Summary This report provides an overview

Jones, Peter JS

350

Mass scale effects for the Sudakov form factors in theories with the broken gauge symmetry  

E-Print Network (OSTI)

The off-shell and the on-shell Sudakov form factors in theories with broken gauge symmetry are calculated in the double-logarithmic approximation. We have used different infrared cut-offs, i.e. different mass scales, for virtual photons and weak gauge bosons.

A. Barroso; B. I. Ermolaev

2002-03-12T23:59:59.000Z

351

Exact Methods in Gauge/String Theories Friday, 11 November 2011  

E-Print Network (OSTI)

Exact Methods in Gauge/String Theories Friday, 11 November 2011 8:30 am Breakfast 8:50 am Welcoming oscillations in conformal field theory" John MCGREEVY, MIT 2:45 ­ 3:30 "Chern-Simons vector models and higher and Macdonald polynomials'' Leonardo RASTELLI, SUNY, Stony Brook Exact Methods in Gauge/String Theories Saturday

352

Gauge-independent transverse and longitudinal self-energies and vertices via the pinch technique  

Science Journals Connector (OSTI)

In the context of the standard model we show how to apply the pinch technique to four-fermion amplitudes with nonconserved external charged currents, in order to construct to one-loop order gauge-independent self-energies and vertices. We discuss the technical difficulties arising due to the presence of longitudinal contributions from the W and Goldstone boson (?) propagators, and derive gauge-independent WW, ?W, and ?? effective self-energies and vertices. The quantities so constructed satisfy a set of Ward identities, whose validity enforces the gauge invariance of the physical amplitude considered; their derivation does not require knowledge of the explicit closed form of the gauge-independent self-energies and vertices. Use of these Ward identities enables the decomposition of the amplitude in manifestly gauge-independent transverse and longitudinal structures with distinct kinematic properties. Explicit one-loop calculations are carried out, and several applications of the results are briefly discussed.

Joannis Papavassiliou

1994-11-01T23:59:59.000Z

353

Six-dimensional (1,0) superconformal models and higher gauge theory  

SciTech Connect

We analyze the gauge structure of a recently proposed superconformal field theory in six dimensions. We find that this structure amounts to a weak Courant-Dorfman algebra, which, in turn, can be interpreted as a strong homotopy Lie algebra. This suggests that the superconformal field theory is closely related to higher gauge theory, describing the parallel transport of extended objects. Indeed we find that, under certain restrictions, the field content and gauge transformations reduce to those of higher gauge theory. We also present a number of interesting examples of admissible gauge structures such as the structure Lie 2-algebra of an abelian gerbe, differential crossed modules, the 3-algebras of M2-brane models, and string Lie 2-algebras.

Palmer, Sam; Sämann, Christian [Maxwell Institute for Mathematical Sciences, Department of Mathematics, Heriot-Watt University, Colin Maclaurin Building, Riccarton, Edinburgh EH14 4AS (United Kingdom)] [Maxwell Institute for Mathematical Sciences, Department of Mathematics, Heriot-Watt University, Colin Maclaurin Building, Riccarton, Edinburgh EH14 4AS (United Kingdom)

2013-11-15T23:59:59.000Z

354

PRODUCTION PROCESS MONITORING OF MULTILAYERED MATERIALS USING TIME-DOMAIN TERAHERTZ GAUGES  

SciTech Connect

The results of both a laboratory and factory trial of a time-domain terahertz (TD-THz) multi-layer gauge for on-line process monitoring are presented. The TD-THz gauge is demonstrated on a two layer laminated plastic insulation material. The TD-THz gauge simultaneously measured the total and the individual layer thicknesses. Measurements were made while transversely scanning across a 12 foot wide sheet extruded at high speed in a factory environment. The results were analyzed for precision, accuracy, and repeatability; and demonstrated that the TD-THz gauge performed in an equivalent or superior manner to existing ionizing radiation gauges (which measure only one layer). Many dielectric materials (e.g., plastic, rubber, paper, paint) are transparent to THz pulses, and the measurement of a wide range of samples is possible.

Zimdars, David; Duling, Irl; Fichter, Greg; White, Jeffrey [Picometrix LLC, 2925 Boardwalk Dr., Ann Arbor, MI 48104 (United States)

2010-02-22T23:59:59.000Z

355

Test plan for Enraf Series 854 level gauge testing in Tank 241-S-106  

SciTech Connect

An Enraf Series 854 level gauge was installed on Tank 241-S-106 (S-106) during the first week of June 1994. On August 11, 1994, the gauge`s measuring wire broke. An investigation has been started to determine how the wire broke. This test plan identifies a qualification test that is part of this investigation. This test will also provide evidence as to the location and extent of potential corrosion on the measuring wire due to tank environment. The results from this testing will provide data for better material selections. This test will involve placing the existing Enraf Series 854 level gauge back into service with the same type of measuring wire (316 stainless steel) that originally broke on August 11, 1994. The gauge will be operated for 14 days. At the end of the 14-day test, the wire shall be sent to Pacific Northwest Laboratory (PNL) for analysis.

Barnes, G.A.

1994-08-23T23:59:59.000Z

356

Propagating modes of non-Abelian tensor gauge field of second rank  

E-Print Network (OSTI)

In the recently proposed extension of the YM theory, non-Abelian tensor gauge field of the second rank is represented by a general tensor whose symmetric part describes the propagation of charged gauge boson of helicity two and its antisymmetric part - the helicity zero charged gauge boson. On the non-interacting level these polarizations are similar to the polarizations of the graviton and of the Abelian antisymmetric B field, but the interaction of these gauge bosons carrying non-commutative internal charges cannot be directly identified with the interaction of gravitons or B field. Our intention here is to illustrate this result from different perspectives which would include Bianchi identity for the corresponding field strength tensor and the analysis of the second-order partial differential equation which describes in this theory the propagation of non-Abelian tensor gauge field of the second rank.

Spyros Konitopoulos; George Savvidy

2007-06-06T23:59:59.000Z

357

The electron-phonon interaction from fundamental local gauge symmetries in solids  

E-Print Network (OSTI)

The elastic properties of solids are described in close analogy with General Relativity, by locally gauging the translational group of space-time. Electron interactions with the crystal lattice are thus generated by enforcing full gauge invariance, with the introduction of a gauge field. Elementary excitations are associated with the local gauge, contrasting to the usual interpretation as being Goldstone bosons emerging from global symmetry breaking. In the linear limit of the theory, the gauge field displays elastic waves, that we identify with acoustic phonons, when the field is quantized. Coupling with the electronic part of the system yields the standard electron-phonon interaction. If spin-orbit effects are included, unusual couplings emerge between the strain field and the electronic spin current, leading to novel physics that may be relevant for spintronic applications.

C. A. Dartora; G. G. Cabrera

2013-07-12T23:59:59.000Z

358

I REMARKS ON THE TOPOLOGY OF GAUGE FIELDS*  

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

! 8 ' SLAC-PUB-2089 March 1978 (T) I REMARKS ON THE TOPOLOGY OF GAUGE FIELDS* t Y. Nambu Stanford Linear Accelerator Center Stanford University, Stanford, California 94305 In contrast to the short distance behavior of quantum chromodynamics (QCD), which is within the scope of perturbation theory and thus can be subjected to quantitative t e s t s , the large distance or strong coupling regime of QCD is not well understood yet even qualitatively. An overriding problem of interest in quark confinement, and various theoretical schemes have been put forward to show that the quarks can indeed be confined. These schemes, though , varying from one to another i n detail, rely on the idea that the growing coupling constant at large distances plays a key role. It is not clear yet, however,

359

A nanocrystal strain gauge for luminescence detection of mechanical forces  

SciTech Connect

Local microscale stresses play a crucial role in inhomogeneous mechanical processes from cell motility to material failure. However, it remains difficult to spatially resolve stress at these small length scales. While contact-probe and non-contact based techniques have been used to quantify local mechanical behavior in specific systems with high stiffness or stress and spatial resolution, these methods cannot be used to study a majority of micromechanical systems due to spectroscopic and geometrical constraints. We present here the design and implementation of a luminescent nanocrystal strain gauge, the CdSe/CdS core/shell tetrapod. The tetrapod can be incorporated into many materials, yielding a local stress measurement through optical fluorescence spectroscopy of the electronically confined CdSe core states. The stress response of the tetrapod is calibrated and utilized to study mechanical behavior in single polymer fibers. We expect that tetrapods can be used to investigate local stresses in many other mechanical systems.

Choi, Charina; Koski, Kristie; Olson, Andrew; Alivisatos, Paul

2010-07-26T23:59:59.000Z

360

Multi-instanton calculus in N=2 supersymmetric gauge theory  

Science Journals Connector (OSTI)

The Seiberg-Witten solution of N=2 supersymmetric SU(2) gauge theory may be viewed as a prediction for the infinite family of constants {Fn} measuring the n-instanton contribution to the prepotential F. Here we examine the instanton physics directly, in particular the contribution of the general self-dual solution of topological charge n constructed by Atiyah, Drinfeld, Hitchin, and Manin (ADHM). In both the bosonic and supersymmetric cases, we determine both the large- and short-distance behavior of all the fields in this background. This allows us to construct the exact classical interaction between n ADHM (super)instantons mediated by the adjoint Higgs bosons. We calculate the one- and two-instanton contributions to the low-energy Seiberg-Witten effective action and find precise agreement with their predicted values of F1 and F2.

Nicholas Dorey; Valentin V. Khoze; Michael P. Mattis

1996-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

Instanton calculus and loop operator in supersymmetric gauge theory  

Science Journals Connector (OSTI)

We compute the one-point function of the glueball loop operator in the maximally confining phase of supersymmetric gauge theory using instanton calculus. In the maximally confining phase the residual symmetry is the diagonal U(1) subgroup and the localization formula implies that the chiral correlation functions are the sum of the contributions from each fixed point labeled by the Young diagram. The summation can be performed exactly by operator formalism of free fermions, which is also featured in the equivariant Gromov-Witten theory of P1. By taking the Laplace transformation of the glueball loop operator, we find an exact agreement with the previous results for the generating function (resolvent) of the glueball one-point functions.

Hiroaki Kanno and Sanefumi Moriyama

2008-06-02T23:59:59.000Z

362

Searching for Lee-Wick Gauge Bosons at the LHC  

E-Print Network (OSTI)

In an extension of the Standard Model(SM) based on the ideas of Lee and Wick, Grinstein, O'Connell and Wise have found an interesting way to remove the usual quadratically divergent contributions to the Higgs mass induced by radiative corrections. Phenomenologically, the model predicts the existence of Terascale, negative-norm copies of the usual SM fields with rather unique properties: ghost-like propagators and negative decay widths, but with otherwise SM-like couplings. The model is both unitary and causal on macroscopic scales. In this paper we examine whether or not such states with these unusual properties can be uniquely identified as such at the LHC. We find that in the extended strong and electroweak gauge boson sector of the model, which is the simplest one to analyze, such an identification can be rather difficult. Observation of heavy gluon-like resonances in the dijet channel offers the best hope for this identification.

Thomas G. Rizzo

2007-04-26T23:59:59.000Z

363

Topics in Noncommutative Gauge Theories and Deformed Relativistic Theories  

E-Print Network (OSTI)

This is my PhD thesis. In this thesis we study the gauge theories on noncommutative Moyal space. We find new static solitons and instantons in terms of the so called generalized Bose operators. Generalized Bose operators are constructed to describe reducible representation of the oscillator algebra. They create/annihilate $k$-quanta, $k$ being a positive integer. We start with giving an alternative description to the already found static magnetic flux tube solutions of the noncommutative gauge theories in terms of generalized Bose operators. The Nielsen-Olesen vortex solutions found in terms of these operators reduce to the already found ones. On the contrary we find a class of new instaton solutions which are unitarily inequivalant to the the ones found from ADHM construction on noncommutative space. The charge of the instaton has a description in terms of the index representing the reducibility of the Fock space, i.e., $k$. After studying the static solitonic solutions in noncommutative Minkowski space and the instaton solutions in noncommutative Euclidean space we go on to study the implications of the time-space noncommutativity in Minkowski space. To understand it properly we study the time-dependent transitions of a forced harmonic oscillator in noncommutative 1+1 dimensional spacetime. We also try to understand the implications of the found results in the context of quantum optics. We then shift to the so called DSR theories which are related to a different kind of noncommutative ($\\kappa$-Minkowski) space. DSR (Doubly/Deformed Special Relativity) aims to search for an alternate relativistic theory which keeps a length/energy scale (the Planck scale) and a velocity scale (the speed of light scale) invariant. We study thermodynamics of an ideal gas in such a scenario.

Nitin Chandra

2013-01-17T23:59:59.000Z

364

The role of the U.S. Clean Coal Technology Program in implementing the objectives of the joint Canada-U.S. acid rain mitigation initiative  

SciTech Connect

The Clean Coal Technology (CCT) Program was initiated by the US Department of Energy (DOE) in part as a response to the 1986 Joint Report of the US and Canadian Special Envoys on Acid Rain, with a particular focus on coal-burning electric power plants. The fist three solicitations of the CCT Program were aimed primarily at mitigating the potential impacts of acid rain. Subsequently, the Clean Air Act Amendments of 1990 established emission reduction targets for SO{sub 2} and No{sub x}, which influenced the goals of the last two CCT Program. This paper provides an overview of the CCT Program and reports the significant results, with emphasis on emissions reduction as well as their impact on ozone formation.

Baldwin, A.L.; Smith, D.N. [Dept. of Energy, Pittsburgh, PA (United States). Federal Energy Technology Center; Mann, A.W.; McIlvried, H.G.; Russell, D.L. Sr. [Burns and Roe Services Corp., Pittsburgh, PA (United States)

1997-12-31T23:59:59.000Z

365

Analysis of the Performance of a Wind-Turbine Airfoil under Heavy-Rain Conditions Using a Multiphase Computational Fluid Dynamics Approach  

Science Journals Connector (OSTI)

These studies show that analyzing the performance of the wind-turbine airfoil under heavy-rain conditions is critical in evaluating the turbine efficiency and overall economic justification of wind farms with respect to the other alternative energy sources. ... The development of the energy generating costs of wind turbines directly depends on the wind turbine output, which depends upon the characteristics of the turbine blades and their surface roughness. ...

Ming Cai; Emadoddin Abbasi; Hamid Arastoopour

2012-11-21T23:59:59.000Z

366

Gauge properties of k?p Hamiltonians for crystals with linear topological defects  

Science Journals Connector (OSTI)

A general expression for the k?p Hamiltonian in crystals with linear topological defects such as dislocations, disclinations, and dispirations has been found. It has been shown to contain gauge potential terms corresponding to a non-Abelian gauge group, E(3), which is the proper Euclidean group. The gauge field is confined within the cores of topological defects and influences the carriers in the bulk of the crystal through the gauge potential which extends beyond it. A general expression for the gauge potential A(r) is presented. For a crystal that contains only dislocations the gauge group E(3) degenerates into T(3), the Abelian subgroup of translations. The corresponding gauge potential becomes A^(r)=i?T(r)(p^/?-k?), where k? is the electron wave vector related to the point in the Brillouin zone for which the k?p Hamiltonian is written, p^ is the momentum-operator matrix in the basis of Bloch functions corresponding to k?, and ?(r) is the distortion tensor.

Y. T. Rebane

1995-07-15T23:59:59.000Z

367

Analysis of the Z0 Resonant Amplitude in General R? Gauges  

Science Journals Connector (OSTI)

The Z0 resonant amplitude is discussed in general R? gauges. When the original on-shell definition of the Z0 mass M is employed, a gauge dependence of M emerges in the next-to-leading approximation which, although small, is of the same magnitude as the current experimental error. In the following order of expansion, these unphysical effects are unbounded. The gauge dependence of M disappears when modified, previously proposed definitions of mass or self-energies are used. The relevance of these considerations to the concept of the mass of unstable particles is pointed out.

Massimo Passera and Alberto Sirlin

1996-11-11T23:59:59.000Z

368

Supermatrix proper-time representation of one-loop effective action and gauge invariance  

Science Journals Connector (OSTI)

Starting from the supermatrix proper-time representation, we construct the gauge-invariant one-loop effective action for generic renormalizable field theories involving spin-0, -½, and -1 fields in flat or curved spacetime. In the presence of fermion couplings involving the ?5 matrix (but the theory having no genuine gauge anomaly), gauge invariance requires that the usual ultraviolet renormalization procedure be supplemented by appropriate finite renormalization terms. The supermatrix method is very convenient for finding the finite renormalization terms associated with vertex functions involving some external fermion legs.

Hyunsoo Min and Choonkyu Lee

1990-01-15T23:59:59.000Z

369

Comment on ``High Temperature Fermion Propagator -- Resummation and Gauge Dependence of the Damping Rate''  

E-Print Network (OSTI)

Baier et al. have reported the damping rate of long-wavelength fermionic excitations in high-temperature QED and QCD to be gauge-fixing-dependent even within the resummation scheme due to Braaten and Pisarski. It is shown that this problem is caused by the singular nature of the on-shell expansion of the fermion self-energy in the infra-red. Its regularization reveals that the alleged gauge dependence pertains to the residue rather than the pole of the fermion propagator, so that in particular the damping constant comes out gauge-independent, as it should.

Anton Rebhan

1992-04-06T23:59:59.000Z

370

The ice-limit of Coulomb gauge Yang-Mills theory  

E-Print Network (OSTI)

In this paper we describe gauge invariant multi-quark states generalising the path integral framework developed by Parrinello, Jona-Lasinio and Zwanziger to amend the Faddeev-Popov approach. This allows us to produce states such that, in a limit which we call the ice-limit, fermions are dressed with glue exclusively from the fundamental modular region associated with Coulomb gauge. The limit can be taken analytically without difficulties, avoiding the Gribov problem. This is llustrated by an unambiguous construction of gauge invariant mesonic states for which we simulate the static quark--antiquark potential.

Heinzl, Thomas; Langfeld, Kurt; Lavelle, Martin; McMullan, David

2008-01-01T23:59:59.000Z

371

Thermodynamics of SU(3) Gauge Theory in 2 + 1 Dimensions  

E-Print Network (OSTI)

The pressure, and the energy and entropy densities are determined for the SU(3) gauge theory in $2 + 1$ dimensions from lattice Monte Carlo calculations in the interval $0.6 \\leq T/T_c \\leq 15$. The finite temperature lattices simulated have temporal extent $N_\\tau = 2, 4, 6$ and 8, and spatial volumes $N_S^2$ such that the aspect ratio is $N_S/N_\\tau = 8$. To obtain the thermodynamical quantities, we calculate the averages of the temporal plaquettes $P_\\tau$ and the spatial plaquettes $P_S$ on these lattices. We also need the zero temperature averages of the plaquettes $P_0$, calculated on symmetric lattices with $N_\\tau = N_S$. We discuss in detail the finite size ($N_S$-dependent) effects. These disappear exponentially. For the zero temperature lattices we find that the coefficient of $N_S$ in the exponent is of the order of the glueball mass. On the finite temperature lattices it lies between the two lowest screening masses. For the aspect ratio equal to eight, the systematic errors coming from the finite size effects are much smaller than our statistical errors. We argue that in the continuum limit, at high enough temperature, the pressure can be parametrized by the very simple formula $p=a-bT_c/T$ where $a$ and $b$ are two constants. Using the thermodynamical identities for a large homogeneous system, this parametrization then determines the other thermodynamical variables in the same temperature range.

P. Bialas; L. Daniel; A. Morel; B. Petersson

2008-07-07T23:59:59.000Z

372

CERN Winter School on Supergravity, Strings, and Gauge Theory 2010  

ScienceCinema (OSTI)

The CERN Winter School on Supergravity, Strings, and Gauge Theory is the analytic continuation of the yearly training school of the former EC-RTN string network "Constituents, Fundamental Forces and Symmetries of the Universe". The 2010 edition of the school is supported and organized by the CERN Theory Divison, and will take place from Monday January 25 to Friday January 29, at CERN. As its predecessors, this school is meant primarily for training of doctoral students and young postdoctoral researchers in recent developments in theoretical high-energy physics and string theory. The programme of the school will consist of five series of pedagogical lectures, complemented by tutorial discussion sessions in the afternoons. Previous schools in this series were organized in 2005 at SISSA in Trieste, and in 2006, 2007, 2008, and 2009 at CERN, Geneva. Other similar schools have been organized in the past by the former related RTN network "The Quantum Structure of Spacetime and the Geometric Nature of Fundamental Interactions". This edition of the school is not funded by the European Union. The school is funded by the CERN Theory Division, and the Arnold Sommerfeld Center at Ludwig-Maximilians University of Munich. Scientific committee: M. Gaberdiel, D. Luest, A. Sevrin, J. Simon, K. Stelle, S. Theisen, A. Uranga, A. Van Proeyen, E. Verlinde Local organizers: A. Uranga, J. Walcher

None

2011-10-06T23:59:59.000Z

373

On the elimination of infinitesimal Gribov ambiguities in non-Abelian gauge theories  

E-Print Network (OSTI)

An alternative method to account for the Gribov ambiguities in gauge theories is presented. It is shown that, to eliminate Gribov ambiguities, at infinitesimal level, it is required to break the BRST symmetry in a soft manner. This can be done by introducing a suitable extra constraint that eliminates the infinitesimal Gribov copies. It is shown that the present approach is consistent with the well established known cases in the literature, i.e., the Landau and maximal Abelian gauges. The method is valid for gauges depending exclusively on the gauge field and is restricted to classical level. However, occasionally, we deal with quantum aspects of the technique, which are used to improve the results.

A. D. Pereira Jr; R. F. Sobreiro

2013-10-02T23:59:59.000Z

374

Building Technologies Program: Tax Deduction Qualified Software- EnergyGauge Summit version 3.11  

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

Provides required documentation that EnergyGauge Summit version 3.11 meets Internal Revenue Code §179D, Notice 2006-52, dated June 2, 2006, for calculating commercial building energy and power cost savings.

375

Building Technologies Program: Tax Deduction Qualified Software- EnergyGauge Summit version 3.13  

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

Provides required documentation that EnergyGauge Summit version 3.13 meets Internal Revenue Code §179D, Notice 2006-52, dated June 2, 2006, for calculating commercial building energy and power cost savings.

376

Building Technologies Program: Tax Deduction Qualified Software- EnergyGauge Summit version 3.14  

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

Provides required documentation that EnergyGauge Summit version 3.14 meets Internal Revenue Code §179D, Notice 2006-52, dated June 2, 2006, for calculating commercial building energy and power cost savings.

377

Quantum cosmological solutions: their dependence on the choice of gauge conditions and physical interpretation  

E-Print Network (OSTI)

In "extended phase space" approach to quantum geometrodynamics numerical solutions to Schrodinger equation corresponding to various choice of gauge conditions are obtained for the simplest isotropic model. The "extended phase space" approach belongs to those appeared in the last decade in which, as a result of fixing a reference frame, the Wheeler - DeWitt static picture of the world is replaced by evolutionary quantum geometrodynamics. Some aspects of this approach were discussed at two previous PIRT meetings. We are interested in the part of the wave function depending on physical degrees of freedom. Three gauge conditions having a clear physical meaning are considered. They are the conformal time gauge, the gauge producing the appearance of Lambda-term in the Einstein equations, and the one covering the two previous cases as asymptotic limits. The interpretation and discussion of the obtained solutions is given.

T. P. Shestakova

2008-01-30T23:59:59.000Z

378

Electric/magnetic duality for chiral gauge theories with anomaly cancellation  

E-Print Network (OSTI)

We show that 4D gauge theories with Green-Schwarz anomaly cancellation and possible generalized Chern-Simons terms admit a formulation that is manifestly covariant with respect to electric/magnetic duality transformations. This generalizes previous work on the symplectically covariant formulation of anomaly-free gauge theories as they typically occur in extended supergravity, and now also includes general theories with (pseudo-)anomalous gauge interactions as they may occur in global or local N=1 supersymmetry. This generalization is achieved by relaxing the linear constraint on the embedding tensor so as to allow for a symmetric 3-tensor related to electric and/or magnetic quantum anomalies in these theories. Apart from electric and magnetic gauge fields, the resulting Lagrangians also feature two-form fields and can accommodate various unusual duality frames as they often appear, e.g., in string compactifications with background fluxes.

Jan De Rydt; Torsten T. Schmidt; Mario Trigiante; Antoine Van Proeyen; Marco Zagermann

2009-02-07T23:59:59.000Z

379

Simulating Typhoon Floods with Gauge Data and Mesoscale-Modeled Rainfall in a Mountainous Watershed  

Science Journals Connector (OSTI)

A physically based distributed hydrological model was applied to simulate typhoon floods over a mountainous watershed in Taiwan. The meteorological forcings include the observed gauge rainfall data and the predicted rainfall data from a mesoscale ...

Ming-Hsu Li; Ming-Jen Yang; Ruitang Soong; Hsiao-Ling Huang

2005-06-01T23:59:59.000Z

380

Anaesthetic machine pipeline inlet pressure gauges do not always measure pipeline pressure  

Science Journals Connector (OSTI)

Some anaesthetic gas machines have pipeline inlet pressure gauges which indicate the higher of either pipeline pressure, or machine circuit pressure (the ... specific circumstances lead to a delayed appreciation ...

Douglas B. Craig; John Longmuir

1980-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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
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381

Towards a chiral gauge theory by deconstruction in AdS5  

E-Print Network (OSTI)

We describe an implementation of a deconstructed gauge theory with charged fermions defined on an interval in five dimensional AdS space. The four dimensional slices are Minkowski, and the end slices support four dimensional chiral zero modes. In such a theory, the energy scales warp down as we move along the fifth dimension. If we augment this theory with localized neutral 4-dimensional Majorana fermions on the low energy end, and implement a Higgs mechanism there, we can arrange the theory such that the lightest gauge boson mode and the chiral mode on the wall at the high energy end are parametrically lighter than all the other states in the theory. If this semiclassical construction does not run into problems at the quantum level, this may provide an explicit construction of a chiral gauge theory. Instanton effects are expected to make the gauge boson heavy only if the resulting effective theory is anomalous.

Tanmoy Bhattacharya; Rajan Gupta; Matthew R. Martin; Yuri Shirman; Csaba Csaki; John Terning

2005-10-12T23:59:59.000Z

382

Stability of an oscillon un the SU (2) gauged Higgs model  

E-Print Network (OSTI)

Oscillons are localized solutions of nonlinear field theories that oscillate without dissipation. We have numerically found a family of very long-lived oscillons the spherical ansatz of the SU(2) gauged Higgs model -the ...

Markov, Ruza

2005-01-01T23:59:59.000Z

383

E-Print Network 3.0 - anomalous gauge couplings Sample Search...  

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

IN p Zb... . Anomalous neutral triple gauge couplings (NTGC), which are not present at tree level in the SM, may induce... .07 0.96 12;Probing Anomalous ... Source: Magiera,...

384

Tide gauge records, water level rise, and subsidence in the Northern Gulf of Mexico  

Science Journals Connector (OSTI)

Long-term water level changes in the northern Gulf of Mexico were examined using tide gauge records for this century. Strong coherence exists between the annual mean water changes at Galveston, Texas, and (1) the...

R. Eugene Turner

1991-06-01T23:59:59.000Z

385

Towards the continuum limit of the lattice Landau gauge gluon propagator  

SciTech Connect

The infrared behaviour of the lattice Landau gauge gluon propagator is discussed, combining results from simulations with different volumes and lattice spacings. In particular, the Cucchieri-Mendes bounds are computed and their implications for D(0) discussed.

Oliveira, O. [Centro de Fisica Computacional, Rua Larga, Universidade de Coimbra, P-3004-516 Coimbra (Portugal); Departamento de Fisica, Instituto Tecnologico de Aeronautica, 12.228-900, Sao Jose dos Campos, SP (Brazil); Silva, P. J. [Centro de Fisica Computacional, Rua Larga, Universidade de Coimbra, P-3004-516 Coimbra (Portugal)

2011-05-23T23:59:59.000Z

386

Broken gauge symmetry in a Bose gas with constant particle number  

E-Print Network (OSTI)

The existence of broken gauge symmetries in Bose-Einstein condensates is still controversially discussed in science, since it would not conserve the total number of particles. Here, it is shown for the first time that non-random condensate and non-condensate phase distributions may arise from local particle number breaking in a Bose gas with constant particle number, while the global U(1)-gauge symmetry of the system is preserved due to particle number conservation.

Alexej Schelle

2014-12-13T23:59:59.000Z

387

CP invariance of chiral gauge theories and Majorana-Yukawa couplings on the lattice  

E-Print Network (OSTI)

The construction of CP-invariant lattice chiral gauge theories and the construction of lattice Majorana fermions with chiral Yukawa couplings is subject to topological obstructions. In the present work we suggest lattice extensions of charge and parity transformation for Weyl fermions. This enables us to construct lattice chiral gauge theories that are CP invariant. For the construction of Majorana-Yukawa couplings, we discuss two models with symplectic Majorana fermions: a model with two symplectic doublets, and one with an auxiliary doublet.

Yuji Igarashi; Jan M. Pawlowski

2009-11-11T23:59:59.000Z

388

Landau background gauge fixing and the IR properties of Yang-Mills Green functions  

Science Journals Connector (OSTI)

We analyze the complete algebraic structure of the background field method for Yang-Mills theory in the Landau gauge and show several structural simplifications within this approach. In particular, we present a new way to study the IR behavior of Green functions in the Landau gauge and show that there exists a unique Green function whose IR behavior controls the IR properties of the gluon and the ghost propagators.

Pietro A. Grassi; Tobias Hurth; Andrea Quadri

2004-11-16T23:59:59.000Z

389

A study of the troxler nuclear soil density and moisture gauges  

E-Print Network (OSTI)

A STUDY OF THE TROXLER NUCLEAR SOIL DENSITY AND MOISTURE GAUGES A Thesis By Robert Lane Friedenwald Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE May 1963 Major Subject: Civil Engineering A STUDY OF THE TROXLER NUCLEAR SOIL DENSITY AND MOISTURE GAUGES A Thesis By Robert Lane Friedenwald Approved as to style and content by: (Chairma of Committee) (Hea of Department) May...

Friedenwald, Robert Lane

2012-06-07T23:59:59.000Z

390

Chaos, Scaling and Existence of a Continuum Limit in Classical Non-Abelian Lattice Gauge Theory  

E-Print Network (OSTI)

We discuss space-time chaos and scaling properties for classical non-Abelian gauge fields discretized on a spatial lattice. We emphasize that there is a ``no go'' for simulating the original continuum classical gauge fields over a long time span since there is a never ending dynamical cascading towards the ultraviolet. We note that the temporal chaotic properties of the original continuum gauge fields and the lattice gauge system have entirely different scaling properties thereby emphasizing that they are entirely different dynamical systems which have only very little in common. Considered as a statistical system in its own right the lattice gauge system in a situation where it has reached equilibrium comes closest to what could be termed a ``continuum limit'' in the limit of very small energies (weak non-linearities). We discuss the lattice system both in the limit for small energies and in the limit of high energies where we show that there is a saturation of the temporal chaos as a pure lattice artifact. Our discussion focuses not only on the temporal correlations but to a large extent also on the spatial correlations in the lattice system. We argue that various conclusions of physics have been based on monitoring the non-Abelian lattice system in regimes where the fields are correlated over few lattice units only. This is further evidenced by comparison with results for Abelian lattice gauge theory. How the real time simulations of the classical lattice gauge theory may reach contact with the real time evolution of (semi-classical aspects of) the quantum gauge theory (e.g. Q.C.D.) is left as an important question to be further examined.

Holger Bech Nielsen; Hans Henrik Rugh; Svend Erik Rugh

1996-11-18T23:59:59.000Z

391

Chaos, scaling and existence of a continuum limit in classical non-Abelian lattice gauge theory  

SciTech Connect

We discuss space-time chaos and scaling properties for classical non-Abelian gauge fields discretized on a spatial lattice. We emphasize that there is a {open_quote}no go{close_quotes} for simulating the original continuum classical gauge fields over a long time span since there is a never ending dynamical cascading towards the ultraviolet. We note that the temporal chaotic properties of the original continuum gauge fields and the lattice gauge system have entirely different scaling properties thereby emphasizing that they are entirely different dynamical systems which have only very little in common. Considered as a statistical system in its own right the lattice gauge system in a situation where it has reached equilibrium comes closest to what could be termed a {open_quotes}continuum limit{close_quotes} in the limit of very small energies (weak non-linearities). We discuss the lattice system both in the limit for small energies and in the limit of high energies where we show that there is a saturation of the temporal chaos as a pure lattice artifact. Our discussion focuses not only on the temporal correlations but to a large extent also on the spatial correlations in the lattice system. We argue that various conclusions of physics have been based on monitoring the non-Abelian lattice system in regimes where the fields are correlated over few lattice units only. This is further evidenced by comparison with results for Abelian lattice gauge theory. How the real time simulations of the classical lattice gauge theory may reach contact with the real time evolution of (semi-classical aspects of) the quantum gauge theory (e.g. Q.C.D.) is left an important question to be further examined.

Nielsen, H.B. [Niels Bohr Inst., Kobenhavn (Denmark); Rugh, H.H. [Univ. of Warwick, Coventry (United Kingdom); Rugh, S.E. [Los Alamos National Lab., NM (United States)

1996-12-31T23:59:59.000Z

392

Faddeev-Popov Zeros and Confinement of Color in a Hyperspherical Gauge Model  

Science Journals Connector (OSTI)

A new rotationally invariant Hamiltonian method, formulated on a four-dimensional hyperspherical surface, is proposed for the numerical study of quantum gauge field models. It is shown that in the Coulomb gauge it is sufficient, as well as necessary, to restrict transverse potentials to the zero-free domain of the Faddeev-Popov determinant. Numerical studies of an SU(2) model support Gribov's suggestion that the zeros provide a natural way to understand the origin of confinement.

R. E. Cutkosky

1983-08-15T23:59:59.000Z

393

Topology and $\\theta$ dependence in finite temperature $G_2$ lattice gauge theory  

E-Print Network (OSTI)

In this work we study the topological properties of the $G_2$ lattice gauge theory by means of Monte Carlo simulations. We focus on the behaviour of topological quantities across the deconfinement transition and investigate observables related to the $\\theta$ dependence of the free energy. As in $SU(N)$ gauge theories, an abrupt change happens at deconfinement and an instanton gas behaviour rapidly sets in for $T>T_c$.

Bonati, Claudio

2015-01-01T23:59:59.000Z

394

On the Caudrey-Beals-Coifman System and the Gauge Group Action  

E-Print Network (OSTI)

The generalized Zakharov-Shabat systems with complex-valued Cartan elements and the systems studied by Caudrey, Beals and Coifman (CBC systems) and their gauge equivalent are studies. This includes: the properties of fundamental analytical solutions (FAS) for the gauge-equivalent to CBC systems and the minimal set of scattering data; the description of the class of nonlinear evolutionary equations solvable by the inverse scattering method and the recursion operator, related to such systems; the hierarchies of Hamiltonian structures.

Georgi G. Grahovski; Marissa Condon

2007-10-17T23:59:59.000Z

395

Cosmological moduli problem and oscillating inflation in gauge-mediated supersymmetry breaking  

Science Journals Connector (OSTI)

We investigate cosmological moduli problem in the gauge-mediated supersymmetry breaking (GMSB). A mini-inflation (oscillating inflation) takes place when a scalar field corresponding to the flat direction in GMSB oscillates along the logarithmic potential induced by the gauge-mediation mechanism. It is shown that this oscillating inflation can sufficiently dilute the relic abundance of the string moduli for some ranges of parameters in the GMSB models.

T. Asaka; M. Kawasaki; Masahide Yamaguchi

1999-01-01T23:59:59.000Z

396

The role of BRST charge as a generator of gauge transformations in quantization of gauge theories and Gravity  

E-Print Network (OSTI)

In the Batalin - Fradkin - Vilkovisky approach to quantization of gauge theories a principal role is given to the BRST charge which can be constructed as a series in Grassmannian (ghost) variables with coefficients given by generalized structure functions of constraints algebra. Alternatively, the BRST charge can be derived making use of the Noether theorem and global BRST invariance of the effective action. In the case of Yang - Mills fields the both methods lead to the same expression for the BRST charge, but it is not valid in the case of General Relativity. It is illustrated by examples of an isotropic cosmological model as well as by spherically-symmetric gravitational model which imitates the full theory of gravity much better. The consideration is based on Hamiltonian formulation of General Relativity in extended phase space. At the quantum level the structure of the BRST charge is of great importance since BRST invariant quantum states are believed to be physical states. Thus, the definition of the BRST charge at the classical level is inseparably related to our attempts to find a true way to quantize Gravity.

T. P. Shestakova

2014-10-16T23:59:59.000Z

397

Collider signatures of the SO(5) x U(1) gauge-Higgs unification  

E-Print Network (OSTI)

Collider signatures of the $SO(5) \\times U(1)$ gauge-Higgs unification model in the Randall-Sundrum warped space are explored. Gauge couplings of quarks and leptons receive small corrections from the fifth dimension whose effects are tested by the precision data. It is found that the forward-backward asymmetries in $e^+e^-$ collisions on the $Z$ pole are well explained in a wide range of the warp factor $z_L$, but the model is consistent with the branching fractions of $Z$ decay only for large $z_L \\simg 10^{15}$. Kaluza-Klein (KK) spectra of gauge bosons, quarks, and leptons as well as gauge and Higgs couplings of low-lying KK excited states are determined. Right-handed quarks and leptons have larger couplings to the KK gauge bosons than left-handed ones. Production rates of Higgs bosons and KK states at Tevatron, LHC and ILC are evaluated. The first KK $Z$ has a mass 1130 GeV with a width 422 GeV for $z_L = 10^{15}$. The current limit on the $Z'$ production at Tevatron and LHC indicates $z_L >10^{15}$. A large effect of parity violation appears in the difference between the rapidity distributions of $e^+$ and $e^-$ in the decay of the first KK $Z$. The first KK gauge bosons decay into light and heavy quarks evenly.

Yutaka Hosotani; Minoru Tanaka; Nobuhiro Uekusa

2011-03-31T23:59:59.000Z

398

Heat kernel of non-minimal gauge field kinetic operators on Moyal plane  

E-Print Network (OSTI)

We generalize the Endo formula originally developed for the computation of the heat kernel asymptotic expansion for non-minimal operators in commutative gauge theories to the noncommutative case. In this way, the first three non-zero heat trace coefficients of the non-minimal U(N) gauge field kinetic operator on the Moyal plane taken in an arbitrary background are calculated. We show that the non-planar part of the heat trace asymptotics is determined by U(1) sector of the gauge model. The non-planar or mixed heat kernel coefficients are shown to be gauge-fixing dependent in any dimension of space-time. In the case of the degenerate deformation parameter the lowest mixed coefficients in the heat expansion produce non-local gauge-fixing dependent singularities of the one-loop effective action that destroy the renormalizability of the U(N) model at one-loop level. The twisted-gauge transformation approach is discussed.

Alexei Strelchenko

2006-08-18T23:59:59.000Z

399

A search for a new gauge boson A'  

SciTech Connect

In the Standard Model, gauge bosons mediate the strong, weak, and electromagnetic forces. New forces could have escaped detection only if their mediators are either heavier than order(TeV) or weakly coupled to charged matter. New vector bosons with small coupling {alpha}' arise naturally from a small kinetic mixing with the photon and have received considerable attention as an explanation of various dark matter related anomalies. Such particles can be produced in electron-nucleus fixed-target scattering and then decay to e{sup +}e{sup -} pairs. New light vector bosons and their associated forces are a common feature of Standard Model extensions, but existing constraints are remarkably sparse. The APEX experiment will search for a new vector boson A' with coupling {alpha}'/{alpha}{sub fs} > 6 × 10{sup -8} to electrons in the mass range 65MeV < mass A' < 550MeV. The experiment will study e{sup +}e{sup -} production off an electron beam incident on a high-Z target in Hall A at Jefferson Lab. The e{sup -} and e{sup +} will be detected in the High Resolution Spectrometers (HRSs). The invariant mass spectrum of the e{sup +}e{sup -} pairs will be scanned for a narrow resonance corresponding to the mass of the A'. A test run for the APEX experiment was held in the summer of 2010. Using the test run data, an A' search was performed in the mass range 175-250 MeV. The search found no evidence for an A' --> e{sup +}e{sup -} reaction, and set an upper limit of {alpha}'/{alpha}{sub fs} ~ 10{sup -6}.

Jensen, Eric L. [William and Mary College

2013-08-01T23:59:59.000Z

400

Changing the Hilbert space structure as a consequence of gauge transformations in "extended phase space" version of quantum geometrodynamics  

E-Print Network (OSTI)

In the earlier works on quantum geometrodynamics in extended phase space it has been argued that a wave function of the Universe should satisfy a Schrodinger equation. Its form, as well as a measure in Schrodinger scalar product, depends on a gauge condition (a chosen reference frame). It is known that the geometry of an appropriate Hilbert space is determined by introducing the scalar product, so the Hilbert space structure turns out to be in a large degree depending on a chosen gauge condition. In the present work we analyse this issue from the viewpoint of the path integral approach. We consider how the gauge condition changes as a result of gauge transformations. In this respect, three kinds of gauge transformations can be singled out: Firstly, there are residual gauge transformations, which do not change the gauge condition. The second kind is the transformations whose parameters can be related by homotopy. Then the change of gauge condition could be described by smoothly changing function. In particular, in this context time dependent gauges could be discussed. We also suggest that this kind of gauge transformations leads to a smooth changing of solutions to the Schrodinger equation. The third kind of the transformations includes those whose parameters belong to different homotopy classes. They are of the most interest from the viewpoint of changing the Hilbert space structure. In this case the gauge condition and the very form of the Schrodinger equation would change in discrete steps when we pass from a spacetime region with one gauge condition to another region with another gauge condition. In conclusion we discuss the relation between quantum gravity and fundamental problems of ordinary quantum mechanics.

T. P. Shestakova

2005-12-09T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

A case study of the vertical-motion field and its relation to the subtropical jet stream during an unusual period of wintertime rain in Oklahoma and Texas  

E-Print Network (OSTI)

A CASE STUDY QF THE VERTICAL-MOTION FIELD AND ITS RELATION TO THE SUBTROPICAL JET STREAM DURING AN UNUSUAL PERIOD OF WINTERTIME RAIN IN OKLAHOMA AND TEXAS A Thesis MYRON DEROYCE SMITH Submitted to the Graduate College of Texas A8M University... IN OKLAHOMA AND TEXAS A Thesis by MYRON DEROYCE SMITH Approved as to style and content by: (Chairman of Committee) (Head of Depart ent) (Member) (Member) (Member) (Member) (Member) December 1972 ABSTRACT A Case Study of the Vertical-Motion Field...

Smith, Myron Deroyce

2012-06-07T23:59:59.000Z

402

Controlling acid rain  

E-Print Network (OSTI)

High concentrations of sulfuric and nitric acid in raTn fn the northeastern USA are caused by the large scale combustion of fossil fuels within this region. Average precipitation acidity is pH 4.2, but spatial and temporal ...

Fay, James A.

1983-01-01T23:59:59.000Z

403

Rain Machine (Solar Still)  

K-12 Energy Lesson Plans and Activities Web site (EERE)

Working in groups, students build simple solar stills filled with salt water and observe what happens when the stills are placed in the sun. The students then taste the water they have collected and discuss what has happened in their stills.

404

ARM - Cloud and Rain  

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

the movement is from equator towards the poles. This type of circulation has the name Hadley Cell circulation. However, when we look at the winds of the world, we also have to...

405

A Bicycle Built for Two: The Galilean and U(1) Gauge Invariance of the Schr\\"odinger Field  

E-Print Network (OSTI)

This paper undertakes a study of the nature of the force associated with the local U (1) gauge symmetry of a non-relativistic quantum particle. To ensure invariance under local U (1) symmetry, a matter field must couple to a gauge field. We show that such a gauge field necessarily satisfies the Maxwell equations, whether the matter field coupled to it is relativistic or non-relativistic. This result suggests that the structure of the Maxwell equations is determined by gauge symmetry rather than the symmetry transformation properties of space-time. In order to assess the validity of this notion, we examine the transformation properties of the coupled matter and gauge fields under Galilean transformations. Our main technical result is the Galilean invariance of the full equations of motion of the U (1) gauge field.

Colussi, V

2008-01-01T23:59:59.000Z

406

Adler-Bardeen theorem and cancellation of gauge anomalies to all orders in nonrenormalizable theories  

E-Print Network (OSTI)

We prove the Adler-Bardeen theorem in a large class of general gauge theories, including nonrenormalizable ones. We assume that the gauge symmetries are general covariance, local Lorentz symmetry and Abelian and non-Abelian Yang-Mills symmetries, and that the local functionals of vanishing ghost number satisfy a variant of the Kluberg-Stern--Zuber conjecture. We show that if the gauge anomalies are trivial at one loop, for every truncation of the theory there exists a subtraction scheme where they manifestly vanish to all orders, within the truncation. Outside the truncation the cancellation of gauge anomalies can be enforced by fine-tuning local counterterms. The framework of the proof is worked out by combining a recently formulated chiral dimensional regularization with a gauge invariant higher-derivative regularization. If the higher-derivative regularizing terms are placed well beyond the truncation, and the energy scale $\\Lambda$ associated with them is kept fixed, the theory is super-renormalizable and...

Anselmi, Damiano

2015-01-01T23:59:59.000Z

407

Gauge-invariant three-boson vertices and their Ward identities in the standard model  

Science Journals Connector (OSTI)

In the context of the standard model we extend the S-matrix pinch technique for nonconserved currents to the case of three-boson vertices. We outline in detail how effective gauge-invariant three-boson vertices can be constructed, with all three incoming momenta off shell. Explicit closed expressions for the vertices ?W-W+, ZW-W+, and ?W-W+ are reported. The three-boson vertices so constructed satisfy naive QED-like Ward identities which relate them to the gauge-invariant gauge boson self-energies previously constructed by the same method. The derivation of the aforementioned Ward identities relies on the sole requirement of complete gauge invariance of the S-matrix element considered; in particular, no knowledge of the explicit closed form of the three-boson vertices involved is necessary. The validity of one of these Ward identities is demonstrated explicitly, through a detailed diagrammatic one-loop analysis, in the context of three different gauges.

Joannis Papavassiliou and Kostas Philippides

1995-08-15T23:59:59.000Z

408

Chaos, Scaling and Existence of a Continuum Limit in Classical Non-Abelian Lattice Gauge Theory  

E-Print Network (OSTI)

We discuss space-time chaos and scaling properties for classical non-Abelian gauge fields discretized on a spatial lattice. We emphasize that there is a ``no go'' for simulating the original continuum classical gauge fields over a long time span since there is a never ending dynamical cascading towards the ultraviolet. We note that the temporal chaotic properties of the original continuum gauge fields and the lattice gauge system have entirely different scaling properties thereby emphasizing that they are entirely different dynamical systems which have only very little in common. Considered as a statistical system in its own right the lattice gauge system in a situation where it has reached equilibrium comes closest to what could be termed a ``continuum limit'' in the limit of very small energies (weak non-linearities). We discuss the lattice system both in the limit for small energies and in the limit of high energies where we show that there is a saturation of the temporal chaos as a pure lattice artifact. ...

Nielsen, Holger Bech; Rugh, S E; Nielsen, Holger Bech; Rugh, Hans Henrik; Rugh, Svend Erik

1996-01-01T23:59:59.000Z

409

Chern-Simons Spinor Electrodynamics in the Light-Cone Gauge  

E-Print Network (OSTI)

The one-loop quantum corrections of Chern-Simons spinor electrodynamics in the light-cone gauge has been investigated. We have calculated the vacuum polarization tensor, fermionic self-energy and on-shell vertex correction with a hybrid regularization consisting of a higher covariant derivative regularization and dimensional continuation. The Mandelstam-Leibbrandt prescription is used to handle the spurious light-cone singularity in the gauge field propagator. We then perform the finite renormalization to define the quantum theory. The generation of the parity-even Maxwell term and the arising of anomalous magnetic moment from quantum corrections are reproduced as in the case of a covariant gauge choice. The Ward identities in the light-cone gauge are verified to satisfy explicitly. Further, we have found the light-cone vector dependent sector of local quantum effective action for the fermion is explicitly gauge invariant, and hence the covariance of $S$-matrix elements of the theory can be achieved.

Wenfeng Chen

2012-09-30T23:59:59.000Z

410

A Heuristic Approach for Big Bucket Production Planning Problems  

E-Print Network (OSTI)

Oct 4, 2006 ... Multi-level production planning problems in which multiple items ..... To satisfy (8)

2006-10-04T23:59:59.000Z

411

A Computational Analysis of Lower Bounds for Big Bucket ...  

E-Print Network (OSTI)

t represent production, setup, and inventory variables for item i in pe- riod t .... j t t ? [1,NT],i ? [1,NI]. (10). Note that for (9) to be well-defined, we let di t = 0 for all ...

2012-02-13T23:59:59.000Z

412

NASA Technical Memorandum 112877 Buckets, Clusters and Dienst  

E-Print Network (OSTI)

of Scientific and Technical Information (STI). Spurred by recent advances in network information systems 23607 m.l.nelson@larc.nasa.gov Kurt Maly Old Dominion University Computer Science Department Norfolk, VA 23529 maly@cs.odu.edu Stewart N. T. Shen Old Dominion University Computer Science Department Norfolk, VA

Nelson, Michael L.

413

Incidence and spread of insects from bucket elevator leg boots.  

E-Print Network (OSTI)

??In commercial grain elevators and feed mills, the boot and pit areas contribute to commingling of insects with grain that moves through the elevator leg.… (more)

Tilley, Dennis Ray

2013-01-01T23:59:59.000Z

414

Heavy quark free energy in QCD and in gauge theories with gravity duals  

SciTech Connect

Recent lattice results in pure glue SU(3) theory at high temperatures have shown that the expectation value of the renormalized Polyakov loop approaches its asymptotic limit at high temperatures from above. We show that this implies that the 'heavy quark free energy' obtained from the renormalized loop computed on the lattice does not behave like a true thermodynamic free energy. While this should be expected to occur in asymptotically free gauge theories such as QCD, we use the gauge/string duality to show that in a large class of strongly coupled gauge theories with nontrivial UV fixed points the Polyakov loop reaches its asymptotic value from above only if the dimension of the relevant operator used to deform the conformal field theory is greater than or equal to 3.

Noronha, Jorge [Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027 (United States)

2010-09-15T23:59:59.000Z

415

Renormalization of composite operators in Yang-Mills theories using a general covariant gauge  

SciTech Connect

Essential to QCD applications of the operator product expansion, etc., is a knowledge of those operators that mix with gauge-invariant operators. A standard theorem asserts that the renormalization matrix is triangular: Gauge-invariant operators have alien'' gauge-variant operators among their counterterms, but, with a suitably chosen basis, the necessary alien operators have only themselves as counterterms. Moreover, the alien operators are supposed to vanish in physical matrix elements. A recent calculation by Hamberg and van Neerven apparently contradicts these results. By explicit calculations with the energy-momentum tensor, we show that the problems arise because of subtle infrared singularities that appear when gluonic matrix elements are taken on shell at zero momentum transfer.

Collins, J.C.; Scalise, R.J. (The Pennsylvania State University, Department of Physics, 104 Davey Laboratory, University Park, Pennsylvania 16802 (United States))

1994-09-15T23:59:59.000Z

416

Note on Gauge Theories on M/G and the AdS/CFT Correspondence  

E-Print Network (OSTI)

It is well known that a weakly coupled U(N) gauge theory on a torus with sides of length L has extra light states with energies of order 1/NL. We show that a similar result holds for gauge theories on M/G where M is any compact Riemannian manifold and G is any freely acting discrete isometry group. As in the toroidal case, this is achieved by adding a suitable nontrivial flat connection. As one application, we consider the AdS/CFT correspondence on spacetimes asymptotic to AdS_5/G. By considering finite size effects at nonzero temperature, we show that consistency requires these extra light states of the gauge theory on S^3/G.

Gary T. Horowitz; Ted Jacobson

2002-01-02T23:59:59.000Z

417

Lorentz-violating regulator gauge fields as the origin of dynamical flavor oscillations  

Science Journals Connector (OSTI)

We show how a mass mixing matrix can be generated dynamically, for two massless fermion flavors coupled to a Lorentz invariance violating (LIV) gauge field. The LIV features play the role of a regulator for the gap equations, and the nonanalytic dependence of the dynamical masses, as functions of the gauge coupling, allows us to consider the limit where the LIV gauge field eventually decouples from the fermions. Lorentz invariance is then recovered, to describe the oscillation between two free fermion flavors, and we check that the finite dynamical masses are the only effects of the original LIV theory. We also discuss briefly a connection of our results with the case of Majorana neutrinos in both, the standard model, where only left-handed (active) neutrinos are considered, and extensions thereof, with sterile right-handed neutrinos.

Jean Alexandre; Julio Leite; Nick E. Mavromatos

2013-06-20T23:59:59.000Z

418

Collider signatures of the SO(5)xU(1) gauge-Higgs unification  

SciTech Connect

Collider signatures of the SO(5)xU(1) gauge-Higgs unification model in the Randall-Sundrum warped space are explored. Gauge couplings of quarks and leptons receive small corrections from the fifth dimension whose effects are tested by the precision data. It is found that the forward-backward asymmetries in e{sup +}e{sup -} collisions on the Z pole are well explained in a wide range of the warp factor z{sub L}, but the model is consistent with the branching fractions of Z decay only for large z{sub L} > or approx. 10{sup 15}. Kaluza-Klein (KK) spectra of gauge bosons, quarks, and leptons as well as gauge and Higgs couplings of low-lying KK excited states are determined. Right-handed quarks and leptons have larger couplings to the KK gauge bosons than left-handed ones. Production rates of Higgs bosons and KK states at the Tevatron, LHC, and International Linear Collider are evaluated. The first KK Z has a mass 1130 GeV with a width 422 GeV for z{sub L}=10{sup 15}. The current limit on the Z' production at the Tevatron and LHC indicates z{sub L}>10{sup 15}. A large effect of parity violation appears in the difference between the rapidity distributions of e{sup +} and e{sup -} in the decay of the first KK Z. The first KK gauge bosons decay into light and heavy quarks evenly.

Hosotani, Yutaka; Tanaka, Minoru; Uekusa, Nobuhiro [Department of Physics, Osaka University, Toyonaka, Osaka 560-0043 (Japan)

2011-10-01T23:59:59.000Z

419

Muon Anomalous Magnetic Moment and Gauge Symmetry in the Standard Model  

E-Print Network (OSTI)

No gauge invariant regularization is available for the perturbative calculation of the standard model. One has to add finite counter terms to restore gauge symmetry for the renormalized amplitudes. The muon anomalous magnetic moment can be accurately measured but the experimental result does not entirely agree with the theoretical calculation from the standard model. This paper is to compute the contributions to the muon gyromagnetic ratio $g_{\\mu}$ due to the finite counter terms. The result obtained is found to be far from sufficient to explain the discrepancy between theory and experiment.

Tsai, Er-Cheng

2014-01-01T23:59:59.000Z

420

Thermal gauge boson masses of the electroweak theory in the broken phase  

Science Journals Connector (OSTI)

Thermal effects in the broken phase of the electroweak theory are studied in the strongly interacting Higgs boson limit. In that limit and at the tree level the bosonic sector of the theory is a gauged non-linear sigma model. The associated one-loop thermal effective action for soft fields is then computed by using the background field method together with the Stueckelberg formalism. This effective action describes thermal corrections to the masses of the gauge bosons W, Z and the photon. It is the proper generalization of the hard thermal effective action of a Yang-Mills theory when there is a Higgs mechanism for a heavy Higgs particle.

Cristina Manuel

1998-05-19T23:59:59.000Z

Note: This page contains sample records for the topic "bucket rain gauge" 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

Z2 electric strings and center vortices in SU(2) lattice gauge theory  

E-Print Network (OSTI)

We study the representations of SU(2) lattice gauge theory in terms of sums over the worldsheets of center vortices and Z2 electric strings, i.e. surfaces which open on the Wilson loop. It is shown that in contrast to center vortices the density of electric Z2 strings diverges in the continuum limit of the theory independently of the gauge fixing, however, their contribution to the Wilson loop yields physical string tension due to non-positivity of their statistical weight in the path integral, which is in turn related to the presence of Z2 topological monopoles in the theory.

M. I. Polikarpov; P. V. Buividovich

2008-01-01T23:59:59.000Z

422

Generalizing Born-Oppenheimer approximations and observable effects of an induced gauge field  

Science Journals Connector (OSTI)

By extending the Born-Oppenheimer approximation improved by Wilczek et al. to deal with separation of the spin and space coordinates of a particle in an external field, we generally discuss the direct effects of an induced gauge field and the higher-order corrections to the problem. It is shown that Bitter and Dubbers's experiment about Berry's phase is directly explained as an effect of the induced gauge potential in terms of the first-order approximation in this paper. The higher-order effects appearing in this experiment are also pointed out when the adiabatic conditions are broken.

Chang-Pu Sun and Mo-Lin Ge

1990-02-15T23:59:59.000Z

423

Overview of Triple and Quartic Gauge Coupling Measurements at the LHC  

E-Print Network (OSTI)

Scrutiny of the structure of electroweak gauge boson self-interactions through triple and quartic gauge boson couplings (TGCs and QGCs) constitutes an important part of the physics program of the Large Hadron Collider (LHC). Triboson production and vector boson scattering (VBS) are directly sensitive to QGCs while vector boson fusion (VBF) offers a new window in the study of TGCs, which is complementary to conventional measurements using diboson production. In this contribution, an overview of recent TGC and QCG measurements using triboson production, VBS and VBF by the ATLAS and CMS experiments at the LHC is presented.

Takashi Kubota

2014-08-28T23:59:59.000Z

424

Guidelines for Testing Pressure Canner Gauges County Extension Agents have offered annual pressure canner testing clinics so clientele  

E-Print Network (OSTI)

Guidelines for Testing Pressure Canner Gauges County Extension Agents have offered annual pressure canner testing clinics so clientele can get their dial gauges tested yearly ­ a practice strongly guidelines for pressure canner testing that have been established by the National Center for Home Food

425

ccsd-00013234,version1-5Nov2005 On the physical meaning of the gauge conditions of Classical Electromagnetism  

E-Print Network (OSTI)

Electromagnetism : the hydrodynamics analogue viewpoint Germain Rousseaux Physique et M´ecanique des Milieux H novembre 2005) Based on an analogy between Fluid Mechanics and Electromagnetism, we claim that the gauge conditions of Classical Electromagnetism are not equivalent contrary to the common belief. These "gauges

Paris-Sud XI, Université de

426

Heat-kernel expansion and counterterms of the Faddeev-Popov determinant in Coulomb and Landau gauge  

E-Print Network (OSTI)

The Faddeev-Popov determinant of Landau gauge in d dimensions and Coulomb gauge in d+1 dimensions is calculated in the heat-kernel expansion up to next-to-leading order. The UV-divergent parts in d=3,4 are isolated and the counterterms required for a non-perturbative treatment of the Faddeev-Popov determinant are determined.

Hugo Reinhardt; Davide R. Campagnari

2010-01-29T23:59:59.000Z

427

2d Affine XY-Spin Model/4d Gauge Theory Duality and Deconfinement  

SciTech Connect

We introduce a duality between two-dimensional XY-spin models with symmetry-breaking perturbations and certain four-dimensional SU(2) and SU(2) = Z{sub 2} gauge theories, compactified on a small spatial circle R{sup 1,2} x S{sup 1}, and considered at temperatures near the deconfinement transition. In a Euclidean set up, the theory is defined on R{sup 2} x T{sup 2}. Similarly, thermal gauge theories of higher rank are dual to new families of 'affine' XY-spin models with perturbations. For rank two, these are related to models used to describe the melting of a 2d crystal with a triangular lattice. The connection is made through a multi-component electric-magnetic Coulomb gas representation for both systems. Perturbations in the spin system map to topological defects in the gauge theory, such as monopole-instantons or magnetic bions, and the vortices in the spin system map to the electrically charged W-bosons in field theory (or vice versa, depending on the duality frame). The duality permits one to use the two-dimensional technology of spin systems to study the thermal deconfinement and discrete chiral transitions in four-dimensional SU(N{sub c}) gauge theories with n{sub f} {ge} 1 adjoint Weyl fermions.

Anber, Mohamed M.; Poppitz, Erich; /Toronto U.; Unsal, Mithat; /SLAC /Stanford U., Phys. Dept. /San Francisco State U.

2012-08-16T23:59:59.000Z

428

Rigorous results on the ultraviolet limit of nonAbelian gauge theories  

E-Print Network (OSTI)

) Yang­Mills field theory in four dimensions (in the trivial topological sector) with a fixed infrared of their lack of positivity; this point is discussed in detail below. Also for technical reasons we have volume cutoff breaks gauge invariance). We cannot lift the infrared volume cutoff, since this would lead

429

Numerical Calculation of Schwinger-Dyson Equation with Momentum-Dependent Gauge Parameter at Finite Temperature  

Science Journals Connector (OSTI)

......approximation Ward-Takahashi identity (WTI) is guaranteed by choosing the Landau gauge...or density, the ladder approximation WTI is not guaranteed trivially.7) For this...ladder approximation SDE to satisfy the WTI at finite temperature. For this purpose......

Shuji Sasagawa; Hidekazu Tanaka

2010-03-01T23:59:59.000Z

430

Deconfinement for SU(2) gauge theory in 2+1 dimensions  

Science Journals Connector (OSTI)

By calculating Polyakov loop averages on a 602×2 lattice, we determine the critical exponent of deconfinement for SU(2) gauge theory in 2+1 dimensions. Universality arguments predict it to be the same as the critical exponent ?=(1/8) for the spontaneous magnetization in the two-dimensional Ising model. Our results are in good accord with this prediction.

J. Engels; E. Kehl; H. Satz; B. Waltl

1985-12-23T23:59:59.000Z

431

Critical exponents of SU(2) gauge theory in 2+1 dimensions  

Science Journals Connector (OSTI)

The critical exponents for the deconfinement transition of SU(2) gauge theory in 2+1 dimensions are predicted by universality arguments to be the same as the critical exponents of the two-dimensional Ising model. Using finite-size scaling techniques, we calculate the critical coupling and critical exponents of the theory. Our results are in good accord with the universality prediction.

E. Kehl; D. Miller; H. Satz; B. Waltl

1988-09-15T23:59:59.000Z

432

Gauge invariance and the finite-element solution of the Schwinger model  

Science Journals Connector (OSTI)

We apply the method of finite elements to two-dimensional quantum electrodynamics. We construct gauge-invariant operator difference equations and compute the chiral anomaly in the Schwinger model. The relative error between the exact answer and the finite-element prediction vanishes like M-2, where M is the number of finite elements.

Carl M. Bender; Kimball A. Milton; David H. Sharp

1985-01-15T23:59:59.000Z

433

Gauge-invariant truncation scheme for the Schwinger-Dyson equations of QCD  

Science Journals Connector (OSTI)

We present a new truncation scheme for the Schwinger-Dyson equations of QCD that respects gauge invariance at any level of the dressed loop expansion. When applied to the gluon self-energy, it allows for its nonperturbative treatment without compromising the transversality of the solution, even when entire sets of diagrams (most notably the ghost loops) are omitted or treated perturbatively.

D. Binosi and J. Papavassiliou

2008-03-19T23:59:59.000Z

434

Mass Operator and Gauge Field Theory with Five-variable Field Functions  

E-Print Network (OSTI)

To investigate the mass generating problem without Higgs mechanism we present a model in which a new scalar gauge coupling is naturally introduced. Because of the existence of production and annihilation for particles in quantum field theory, we extend the number of independent variables from conventional four space-time dimensions to five ones in order to describe all degrees of freedom for field functions while the conventional space-time is still retained to be the background. The potential fifth variable is nothing but the proper time of particles. In response, a mass operator $(\\hat{m}=-i\\hbar \\frac{\\partial}{\\partial\\tau})$ should be introduced. After that, the lagrangian for free fermion fields in terms of five independent variables and mass operator is written down. By applying the gauge principle, three kinds of vector gauge couplings and one kind of scalar gauge coupling are naturally introduced. In the current scenario, the mass spectrum for all fundamental particles is accounted for in principle by solving the eigenvalue of mass operator under the function of all kinds of interactions. Moreover, there no any auxiliary mechanism including spontaneous symmetry breaking get involved in the model. Therefore, traditional problems in the standard model such as the vacuum energy problem are removed from our model, as well as the hierarchy problem on the mass spectrum for fundamental particles.

ChiYi Chen

2014-04-08T23:59:59.000Z

435

The role of translational invariance in non linear gauge theories of gravity  

E-Print Network (OSTI)

The internal structure of the tetrads in a Poincar\\'e non linear gauge theory of gravity is considered. Minkowskian coordinates becomes dynamical degrees of freedom playing the role of Goldstone bosons of the translations. A critical length allowing a covariant expansion similar to the weak field approach is deduced, the zeroth order metric being maximally symmetric (Minkowskian in some cases).

J. Martin; A. Tiemblo

2008-03-04T23:59:59.000Z

436

Instanton calculus and nonperturbative relations in N=2 supersymmetric gauge theories  

Science Journals Connector (OSTI)

Using instanton calculus we check, in the weak coupling region, the nonperturbative relation ?Tr?2?=i?[F-(a/2)?F/?a] obtained for a N=2 globally supersymmetric gauge theory. Our computations are performed for instantons of winding number k, up to k=2, and turn out to agree with previous nonperturbative results.

Francesco Fucito and Gabriele Travaglini

1997-01-15T23:59:59.000Z

437

White noise analysis on manifolds and the energy representation of a gauge group  

E-Print Network (OSTI)

The energy representation of a gauge group on a Riemannian manifold has been discussed by several authors. Y. Shimada has shown the irreducibility for compact Riemannian manifold, using white noise analysis. In this paper we extend its technique to noncompact Riemannian manifolds which have differential operators satisfying some conditions.

Takahiro Hasebe

2011-01-15T23:59:59.000Z

438

Studies of Gauge Boson Production with a gamma/gamma-collider at TESLA  

E-Print Network (OSTI)

In absence of the Standard Model Higgs boson the interaction among the gauge bosons becomes strong at high energies and influences the couplings between them. Each trilinear and quartic gauge boson vertex is characterised by a set of couplings which are expected to deviate from their Standard Model values already at energies lower than the energy scale of the New Physics.The precise measurement of gauge boson couplings can provide clues to the mechanism of the electroweak symmetry breaking and their anomalous values can be a sign of a New Physics effect beyond the Standard Model. The estimated precisions of the trilinear gauge boson coupling (TGC) measurements at a photon collider are about one to two orders of magnitude higher than at LEP and Tevatron providing a measurement highly sensitive to the physics beyond the Standard Model. The optimisation of the forward region of the photon collider detector brings the amount of the low-energy background to the manageable level providing a clean environment for the TGC measurements at a photon collider with estimated precisions.

Jadranka Sekaric

2006-01-16T23:59:59.000Z

439

USING BERNSTEIN POLYNOMIALS TO RECOVER ENGINEERING LOADS FROM STRAIN GAUGE DATA  

Science Journals Connector (OSTI)

......pressures between the human foot and the sole of the shoe or an automobile tyre and the road surface. Most current methods attempt to...with a cross-section of 10 mm wide by 20 mm deep. Twenty electric resistance gauges were positioned at stations along the underside......

W. D. COLLINS; S. QUEGAN; D. SMITH; D. A. W. TAYLOR

1994-11-01T23:59:59.000Z

440

Ebola Virus Outbreak among Wild Chimpanzees Living in a Rain Forest of Co^te Pierre Formenty, Christophe Boesch, Monique Wyers, World Health Organization (WHO), TaiF Forest Project, and Centre  

E-Print Network (OSTI)

S120 Ebola Virus Outbreak among Wild Chimpanzees Living in a Rain Forest of Co^te d'Ivoire Pierre, Paris, France An outbreak of Ebola in nature is described for the first time. During a few weeks. Laboratory procedures included histology, immunohistochemistry, bacteriology, and serology. Ebola

Note: This page contains sample records for the topic "bucket rain gauge" 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

Black hole spectra in holography: consequences for equilibration of dual gauge theories  

E-Print Network (OSTI)

Energy gap in the spectrum of equilibrium states of interacting system, along with ability to continuously excite the system inside this gap, leads to violation of the ergodicity hypothesis. We explore this in the framework of gauge theory/string theory correspondence. We study the spectrum of static black holes in Pilch-Warner geometry. These black holes are holographically dual to equilibrium states of strongly coupled $SU(N)$ ${\\cal N}=2^*$ gauge theory plasma on $S^3$ in the planar limit. We find that there is no energy gap in the black hole spectrum. Thus, there is a priory no obstruction for equilibration of arbitrary low-energy states in the theory via a small black hole gravitational collapse. The latter is contrasted with phenomenological examples of holography with dual four-dimensional CFTs having non-equal central charges in the stress-energy tensor trace anomaly.

Buchel, Alex

2015-01-01T23:59:59.000Z

442

Wilson Loops and Area-Preserving Diffeomorphisms in Twisted Noncommutative Gauge Theory  

E-Print Network (OSTI)

We use twist deformation techniques to analyse the behaviour under area-preserving diffeomorphisms of quantum averages of Wilson loops in Yang-Mills theory on the noncommutative plane. We find that while the classical gauge theory is manifestly twist covariant, the holonomy operators break the quantum implementation of the twisted symmetry in the usual formal definition of the twisted quantum field theory. These results are deduced by analysing general criteria which guarantee twist invariance of noncommutative quantum field theories. From this a number of general results are also obtained, such as the twisted symplectic invariance of noncommutative scalar quantum field theories with polynomial interactions and the existence of a large class of holonomy operators with both twisted gauge covariance and twisted symplectic invariance.

Mauro Riccardi; Richard J. Szabo

2007-01-30T23:59:59.000Z

443

Gauge/Gravity Duality, Green Functions of N=2 SYM and Radial/Energy-Scale Relation  

E-Print Network (OSTI)

We consider supergravity configuration of D5 branes wrapped on supersymmetric 2-cycles and use it to calculate one-point and two-point Green functions of some special operators in N=2 super Yang-Mills theory. We show that Green functions obtained from supergravity include two very different parts. One of them corresponds to perturbative results of quantum field theory, and another is a non-perturbative effect which corresponds to contribution from instantons with fractional charge. Comparing Green functions obtained from supergravity and gauge theory, we obtain radial/energy-scale relation for this gauge/gravity correspondence with N=2 supersymmetry. This relation leads right beta-function of N=2 SYM from supergravity configuration.

Xiao-Jun Wang; Seng Hu

2002-07-16T23:59:59.000Z

444

On higher derivatives in 3D gravity and higher-spin gauge theories  

SciTech Connect

The general second-order massive field equations for arbitrary positive integer spin in three spacetime dimensions, and their 'self-dual' limit to first-order equations, are shown to be equivalent to gauge-invariant higher-derivative field equations. We recover most known equivalences for spins 1 and 2, and find some new ones. In particular, we find a non-unitary massive 3D gravity theory with a 5th order term obtained by contraction of the Ricci and Cotton tensors; this term is part of an N=2 super-invariant that includes the 'extended Chern-Simons' term of 3D electrodynamics. We also find a new unitary 6th order gauge theory for 'self-dual' spin 3.

Bergshoeff, Eric A. [Centre for Theoretical Physics, University of Groningen, Nijenborgh 4, 9747 AG Groningen (Netherlands)], E-mail: E.A.Bergshoeff@rug.nl; Hohm, Olaf [Centre for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States)], E-mail: ohohm@mit.edu; Townsend, Paul K. [Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA (United Kingdom)], E-mail: P.K.Townsend@damtp.cam.ac.uk

2010-05-15T23:59:59.000Z

445

Twenty-first Century Lattice Gauge Theory: Results from the QCD Lagrangian  

SciTech Connect

Quantum chromodynamics (QCD) reduces the strong interactions, in all their variety, to an elegant nonabelian gauge theory. It clearly and elegantly explains hadrons at short distances, which has led to its universal acceptance. Since its advent, however, many of its long-distance, emergent properties have been believed to be true, without having been demonstrated to be true. This paper reviews a variety of results in this regime that have been established with lattice gauge theory, directly from the QCD Lagrangian. This body of work sheds light on the origin of hadron masses, its interplay with dynamical symmetry breaking, as well as on other intriguing features such as the phase structure of QCD. In addition, nonperturbative QCD is quantitatively important to many aspects of particle physics (especially the quark flavor sector), nuclear physics, and astrophysics. This review also surveys some of the most interesting connections to those subjects.

Kronfeld, Andreas S.; /Fermilab

2012-03-01T23:59:59.000Z

446

Wilson loops and area-preserving diffeomorphisms in twisted noncommutative gauge theory  

SciTech Connect

We use twist deformation techniques to analyze the behavior under area-preserving diffeomorphisms of quantum averages of Wilson loops in Yang-Mills theory on the noncommutative plane. We find that while the classical gauge theory is manifestly twist covariant, the holonomy operators break the quantum implementation of the twisted symmetry in the usual formal definition of the twisted quantum field theory. These results are deduced by analyzing general criteria which guarantee twist invariance of noncommutative quantum field theories. From this a number of general results are also obtained, such as the twisted symplectic invariance of noncommutative scalar quantum field theories with polynomial interactions and the existence of a large class of holonomy operators with both twisted gauge covariance and twisted symplectic invariance.

Riccardi, Mauro; Szabo, Richard J. [Department of Mathematics and Maxwell Institute for Mathematical Sciences, Heriot-Watt University, Colin Maclaurin Building, Riccarton, Edinburgh EH14 4AS (United Kingdom)

2007-06-15T23:59:59.000Z

447

Gauge Field Turbulence as a Cause of Inflation in Chern-Simons Modified Gravity  

E-Print Network (OSTI)

In this paper, we study the dynamics of the Chern-Simons Inflation Model proposed by Alexander, Marciano and Spergel. According to this model, inflation begins when a fermion current interacts with a turbulent gauge field in a space larger than some critical size. This mechanism appears to work by driving energy from the initial random spectrum into a narrow band of frequencies, similar to the inverse energy cascade seen in MHD turbulence. In this work we focus on the dynamics of the interaction using phase diagrams and a thorough analysis of the evolution equations. We show that in this model inflation is caused by an over-damped harmonic oscillator driving waves in the gauge field at their resonance frequency.

David Garrison

2014-03-30T23:59:59.000Z

448

Gauge Field Turbulence as a Cause of Inflation in Chern-Simons Modified Gravity  

E-Print Network (OSTI)

In this paper, we study the dynamics of the Chern-Simons Inflation Model proposed by Alexander, Marciano and Spergel. According to this model, inflation begins when a fermion current interacts with a turbulent gauge field in a space larger than some critical size. This mechanism appears to work by driving energy from the initial random spectrum into a narrow band of frequencies, similar to the inverse energy cascade seen in MHD turbulence. In this work we focus on the dynamics of the interaction using phase diagrams and a thorough analysis of the evolution equations. We show that in this model inflation is caused by an over-damped harmonic oscillator driving waves in the gauge field at their resonance frequency.

Garrison, David

2014-01-01T23:59:59.000Z

449

Multilepton signatures of gauge mediated SUSY breaking at CERN LEP II  

Science Journals Connector (OSTI)

In the framework of gauge-mediated supersymmetry breaking models, pair production of the lightest neutralinos, scalar leptons, or charginos at CERN LEP II gives rise to interesting signals involving multilepton final states and missing energy. In the parameter space where the scalar tau, ??1, is the next-to-lightest supersymmetric particle, we identify three interesting regions, which give rise to distinctly different final states: (i) 2 ?-leptons plus missing energy, (ii) 4 charged leptons plus missing energy, where in some regions all four are ?-leptons, or (iii) six charged leptons, of which four are ?-leptons and the other two are electrons or muons, plus missing energy. We study in detail the size of these regions in the parameter space of gauge-mediated models and give cross section contours in these regions for various LEP II energies. We also discuss the possibility of chargino-pair production at LEP II.

Kingman Cheung, Duane A. Dicus, B. Dutta, and S. Nandi

1998-06-08T23:59:59.000Z

450

SU(2) Lattice Gauge Theory- Local Dynamics on Non-intersecting Electric flux Loops  

E-Print Network (OSTI)

We use Schwinger Bosons as prepotentials for lattice gauge theory to de?ne local linking oper- ators and calculate their action on linking states for 2 + 1 dimensional SU(2) lattice gauge theory. We develop a diagrammatic technique and associate a set of (lattice Feynman) rules to compute the entire loop dynamics diagrammatically. The physical loop space is shown to contain only non- intersecting loop con?gurations after solving the Mandelstam constraint. The smallest plaquette loops are contained in the physical loop space and other con?gurations are generated by the action of a set of fusion operators on this basic loop states enabling one to charaterize any arbitrary loop by the basic plaquette together with the fusion variables. Consequently, the full Kogut-Susskind Hamiltonian and the dynamics of all possible non-intersecting physical loops are formulated in terms of these fusion variables.

Ramesh Anishetty; Indrakshi Raychowdhury

2014-11-12T23:59:59.000Z

451

Practical scheme for a light-induced gauge field in an atomic Bose gas  

Science Journals Connector (OSTI)

We propose a scheme to generate an Abelian gauge field in an atomic gas using two crossed laser beams. If the internal atomic state follows adiabatically the eigenstates of the atom-laser interaction, Berry’s phase gives rise to a vector potential that can nucleate vortices in a Bose gas. The present scheme operates even for a large detuning with respect to the atomic resonance, making it applicable to alkali-metal atoms without significant heating due to spontaneous emission. We test the validity of the adiabatic approximation by integrating the set of coupled Gross-Pitaevskii equations associated with the various internal atomic states, and we show that the steady state of the interacting gas indeed exhibits a vortex lattice, as expected from the adiabatic gauge field.

Kenneth J. Günter, Marc Cheneau, Tarik Yefsah, Steffen P. Rath, and Jean Dalibard

2009-01-21T23:59:59.000Z

452

Performance analysis results of a battery fuel gauge algorithm at multiple temperatures  

Science Journals Connector (OSTI)

Abstract Evaluating a battery fuel gauge (BFG) algorithm is a challenging problem due to the fact that there are no reliable mathematical models to represent the complex features of a Li-ion battery, such as hysteresis and relaxation effects, temperature effects on parameters, aging, power fade (PF), and capacity fade (CF) with respect to the chemical composition of the battery. The existing literature is largely focused on developing different BFG strategies and BFG validation has received little attention. In this paper, using hardware in the loop (HIL) data collected form three Li-ion batteries at nine different temperatures ranging from ?20 °C to 40 °C, we demonstrate detailed validation results of a battery fuel gauge (BFG) algorithm. The BFG validation is based on three different BFG validation metrics; we provide implementation details of these three BFG evaluation metrics by proposing three different BFG validation load profiles that satisfy varying levels of user requirements.

B. Balasingam; G.V. Avvari; K.R. Pattipati; Y. Bar-Shalom

2015-01-01T23:59:59.000Z

453

Greybody factors in a rotating black-hole background: Fermions and gauge bosons  

Science Journals Connector (OSTI)

We study the emission of fermion and gauge boson degrees of freedom on the brane by a rotating higher-dimensional black hole. Using matching techniques, for the near-horizon and far-field regime solutions, we solve analytically the corresponding field equations of motion. From this, we derive analytical results for the absorption probabilities and Hawking radiation emission rates, in the low-energy and low-rotation case, for both species of fields. We produce plots of these, comparing them to existing exact numerical results with very good agreement. We also study the total absorption cross section and demonstrate that, as in the nonrotating case, it has a different behavior for fermions and gauge bosons in the low-energy limit, while it follows a universal behavior—reaching a constant, spin-independent, asymptotic value—in the high-energy regime.

S. Creek, O. Efthimiou, P. Kanti, and K. Tamvakis

2007-11-09T23:59:59.000Z

454

Minimal anomaly-free chiral fermion sets and gauge coupling unification  

E-Print Network (OSTI)

We look for minimal chiral sets of fermions beyond the Standard Model that are anomaly-free and, simultaneously, vector-like particles with respect to colour SU(3) and electromagnetic U(1). We then study whether the addition of such particles to the Standard Model particle content allows for the unification of gauge couplings at a high energy scale, above $5.0 \\times 10^{15}$ GeV so as to be safely consistent with proton decay bounds. The possibility to have unification at the string scale is also considered. Inspired in grand unified theories, we also search for minimal chiral fermion sets that belong to SU(5) multiplets. Restricting to representations up to dimension 50, we show that some of these sets can lead to gauge unification at the GUT and/or string scales.

Cebola, Luis M; Felipe, R Gonzalez; Simoes, C

2014-01-01T23:59:59.000Z

455

The Barbero connection and its relation to the histories connection formalism without gauge fixing  

E-Print Network (OSTI)

We present a histories version of the connection formalism of general relativity. Such an approach introduces a spacetime description--a characteristic feature of the histories approach--and we discuss the extent to which the usual loop variables are compatible with a spacetime description. In particular, we discuss the definability of the Barbero connection without any gauge fixing. Although it is not the pullback of a spacetime connection onto the three-surface and it does not have a natural spacetime interpretation, this does not mean that the Barbero connection is not suitable variable for quantisation; it appears naturally in the formalism even in absence of gauge fixing. It may be employed therefore, to define loop variables similar to those employed in loop quantum gravity. However, the loop algebra would have to be augmented by the introduction of additional variables.

Ntina Savvidou

2006-02-07T23:59:59.000Z

456

Subcritical solution of the Yang-Mills Schroedinger equation in the Coulomb gauge  

E-Print Network (OSTI)

In the Hamiltonian approach to Coulomb gauge Yang-Mills theory, the functional Schroedinger equation is solved variationally resulting in a set of coupled Dyson-Schwinger equations. These equations are solved self-consistently in the subcritical regime defined by infrared finite form factors. It is shown that the Dyson-Schwinger equation for the Coulomb form factor fails to have a solution in the critical regime where all form factors have infrared divergent power laws.

D. Epple; H. Reinhardt; W. Schleifenbaum; A. P. Szczepaniak

2007-12-21T23:59:59.000Z

457

Subcritical solution of the Yang-Mills Schroedinger equation in the Coulomb gauge  

SciTech Connect

In the Hamiltonian approach to Coulomb gauge Yang-Mills theory, the functional Schroedinger equation is solved variationally resulting in a set of coupled Dyson-Schwinger equations. These equations are solved self-consistently in the subcritical regime defined by infrared-finite form factors. It is shown that the Dyson-Schwinger equation for the Coulomb form factor fails to have a solution in the critical regime where all form factors have infrared divergent power laws.

Epple, D.; Reinhardt, H.; Schleifenbaum, W.; Szczepaniak, A. P. [Institut fuer Theoretische Physik, Tuebingen University, Auf der Morgenstelle 14 D-72076 Tuebingen (Germany); Physics Department and Nuclear Theory Center Indiana University, Bloomington, Indiana 47405 (United States)

2008-04-15T23:59:59.000Z

458

CP, T and CPT in the non-perturbative formulation of chiral gauge theories  

E-Print Network (OSTI)

In spite of significant recent progress on the non-perturbative formulation of chiral gauge theories there remained several unsolved problems. One of them is the puzzle that the left- and right-handed projectors, and so the left- and right-handed actions, break CP-symmetry on the lattice. We show in this letter that they break T-symmetry also, while CPT remains intact.

Peter Hasenfratz; Moritz Bissegger

2005-01-13T23:59:59.000Z

459

Upperbound on Squark Masses in Gauge-Mediation Model with Light Gravitino  

E-Print Network (OSTI)

We examine stabilities of our supersymmetry-breaking false vacuum in a low-energy direct gauge mediation model of SUSY breaking. The stability required in the high-temperature early universe leads to upperbounds on masses of squarks and gluino as m_\\tilde{q} \\lesssim 1 TeV and m_\\tilde{g} \\lesssim 1 TeV for the light gravitino of mass m_{3/2} \\lesssim 16 eV.

Junji Hisano; Minoru Nagai; Shohei Sugiyama; T. T. Yanagida

2008-04-18T23:59:59.000Z

460

Gauge Fields Emerging From Extra Dimensions a Born-Oppenheimer approach  

E-Print Network (OSTI)

We propose a dynamical mechanism to induce gauge fields in four dimensional space-time from a single scalar field or a spinor field in higher dimensions. The Born-Oppenheimer treatment of the extra dimensions is an essential ingredient in our approach. A possible applications of the idea to low dimensional condensed matter systems and high temperature field theory are also pointed out. This paper is an extended version of our previous unpublished work (SUNY-NTG-89-48, Jan. 1990).

T. Hatsuda; H. Kuratsuji

1994-09-09T23:59:59.000Z

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461

Cosmic strings, zero modes, and supersymmetry breaking in non-Abelian N=1 gauge theories  

Science Journals Connector (OSTI)

We investigate the microphysics of cosmic strings in non-Abelian gauge theories with N=1 supersymmetry. We give the vortex solutions in a specific example and demonstrate that fermionic superconductivity arises because of the couplings and interactions dictated by supersymmetry. We then use supersymmetry transformations to obtain the relevant fermionic zero modes and investigate the role of soft supersymmetry breaking on the existence and properties of the superconducting strings.

Stephen C. Davis; Anne-Christine Davis; Mark Trodden

1998-04-15T23:59:59.000Z

462

Two Species of Vortices in a massive Gauged Non-linear Sigma Model  

E-Print Network (OSTI)

A non-linear sigma model with scalar fields taking values on the sphere is described by means of stereographic maps. When the U(1) symmetry is gauged and mass terms are allowed, the model accommodates stable self-dual vortices of two kinds with different energies per unit of length and where the Higgs field winds at the cores around the two opposite poles of the sphere.

Alonso-Izquierdo, Alberto; Guilarte, Juan Mateos

2014-01-01T23:59:59.000Z

463

Supersymmetric gauge theories, quantisation of moduli spaces of flat connections, and Liouville theory  

E-Print Network (OSTI)

This is the 11th article in the collection of reviews "Exact results in N=2 supersymmetric gauge theories", ed. J. Teschner. It describes an approach to understanding the 4d/2d relations discovered by Alday, Gaiotto and Tachikawa by establishing a triangle of relations between the zero mode quantum mechanics obtained by localisation of class $\\cal S$ theories, the quantum theory obtained by quantisation of Hitchin moduli spaces, and conformal field theory.

Jörg Teschner

2014-12-22T23:59:59.000Z

464

Magnetic discrete gauge field in the confining vacua and the supersymmetric index  

E-Print Network (OSTI)

It has recently been argued that the confining vacua of Yang-Mills theory in the far infrared can have topological degrees of freedom given by magnetic $\\mathbb{Z}_q$ gauge field, both in the non-supersymmetric case and in the N=1 supersymmetric case. In this short note we give another piece of evidence by computing and matching the supersymmetric index of the pure super Yang-Mills theory both in the ultraviolet and in the infrared.

Tachikawa, Yuji

2014-01-01T23:59:59.000Z

465

Magnetic discrete gauge field in the confining vacua and the supersymmetric index  

E-Print Network (OSTI)

It has recently been argued that the confining vacua of Yang-Mills theory in the far infrared can have topological degrees of freedom given by magnetic $\\mathbb{Z}_q$ gauge field, both in the non-supersymmetric case and in the N=1 supersymmetric case. In this short note we give another piece of evidence by computing and matching the supersymmetric index of the pure super Yang-Mills theory both in the ultraviolet and in the infrared.

Yuji Tachikawa

2014-12-09T23:59:59.000Z

466

Supersymmetric gauge theories, quantisation of moduli spaces of flat connections, and Liouville theory  

E-Print Network (OSTI)

This is the 11th article in the collection of reviews "Exact results in N=2 supersymmetric gauge theories", ed. J. Teschner. It describes an approach to understanding the 4d/2d relations discovered by Alday, Gaiotto and Tachikawa by establishing a triangle of relations between the zero mode quantum mechanics obtained by localisation of class $\\cal S$ theories, the quantum theory obtained by quantisation of Hitchin moduli spaces, and conformal field theory.

Teschner, Jörg

2014-01-01T23:59:59.000Z

467

Quasi-Topological Quantum Field Theories and $Z_2$ Lattice Gauge Theories  

E-Print Network (OSTI)

We consider a two parameter family of $Z_2$ gauge theories on a lattice discretization $T(M)$ of a 3-manifold $M$ and its relation to topological field theories. Familiar models such as the spin-gauge model are curves on a parameter space $\\Gamma$. We show that there is a region $\\Gamma_0$ of $\\Gamma$ where the partition function and the expectation value $$ of the Wilson loop for a curve $\\gamma$ can be exactly computed. Depending on the point of $\\Gamma_0$, the model behaves as topological or quasi-topological. The partition function is, up to a scaling factor, a topological number of $M$. The Wilson loop on the other hand, does not depend on the topology of $\\gamma$. However, for a subset of $\\Gamma_0$, $$ depends on the size of $\\gamma$ and follows a discrete version of an area law. At the zero temperature limit, the spin-gauge model approaches the topological and the quasi-topological regions depending on the sign of the coupling constant.

Miguel J. B. Ferreira; Victor A. Pereira; P. Teotonio-Sobrinho

2012-06-11T23:59:59.000Z

468

Quantum dynamics and state-dependent affine gauge fields on CP(N-1)  

E-Print Network (OSTI)

Gauge fields frequently used as an independent construction additional to so-called wave fields of matter. This artificial separation is of course useful in some applications (like Berry's interactions between the "heavy" and "light" sub-systems) but it is restrictive on the fundamental level of "elementary" particles and entangled states. It is shown that the linear superposition of action states and non-linear dynamics of the local dynamical variables form an oscillons of energy representing non-local particles - "lumps" arising together with their "affine gauge potential" agrees with Fubini-Study metric. I use the conservation laws of local dynamical variables (LDV's) during affine parallel transport in complex projective Hilbert space $CP(N-1)$ for twofold aim. Firstly, I formulate the variation problem for the ``affine gauge potential" as system of partial differential equations \\cite{Le1}. Their solutions provide embedding quantum dynamics into dynamical space-time whose state-dependent coordinates related to the qubit spinor subjected to Lorentz transformations of "quantum boosts" and "quantum rotations". Thereby, the problem of quantum measurement being reformulated as the comparison of LDV's during their affine parallel transport in $CP(N-1)$, is inherently connected with space-time emergences. Secondly, the important application of these fields is the completeness of quantum theory. The EPR and Schr\\"odinger's Cat paradoxes are discussed from the point of view of the restored Lorentz invariance due to the affine parallel transport of local Hamiltonian of the soliton-like field.

Peter Leifer

2008-04-11T23:59:59.000Z

469

Cosmological solutions for the Universe filled with matter in various states and gauge invariance  

E-Print Network (OSTI)

We explore at phenomenological level a model of the Universe filled with various kinds of matter characterized by different equations of state. We show that introducing of each kind of matter is equivalent to a certain choice of a gauge condition, the gauge condition describing a medium with a given equation of state. The case of a particular interest is when one kind of matter (de Sitter false vacuum) dominates at the early stage of the Universe evolution while another kind (radiation, or ultrarelativistic gas) dominates at its later stage. We can, therefore, consider different asymptotic regimes for the early and later stages of the Universe existence. These regimes are described by solutions to the Wheeler - DeWitt equation for the Universe with matter in that given state, and, at the same time, in the "extended phase space" approach to quantum geometrodynamics the regimes are described by solutions to a Schrodinger equation associated with a choice of some gauge condition. It is supposed that, from the viewpoint of the observer located at the later stage of the Universe evolution, solutions for a Lambda-dominated early Universe would decay.

T. P. Shestakova

2006-05-11T23:59:59.000Z

470

Dependence of holomorphicity of the gauge coupling constant on the mass matrix in supersymmetric theories  

Science Journals Connector (OSTI)

We investigate the dependence of the holomorphicity of the gauge coupling constant function on the mass matrix at one- and two-loop levels in supersymmetric theories. Gauge invariance puts constraints on the mass matrix. These constraints at the one-loop level lead us to three cases of mass matrix that require different ways of regulating the infrared contributions: massive, pseudomassive, and intrinsically massless. The first two give rise to a holomorphic gauge coupling constant function whereas the last one does not. Two-loop contributions to super QED and super Yang-Mills theory are calculated using the super background field method and their dependence on the mass matrix is found to fall under the same three cases as at the one-loop level. Remarks concerning the general nature of this result to all orders in perturbation theory are included. Making use of our two-loop results we also verify the holomorphicity of the Wilson coupling based on general arguments of Shifman and Vainshtein.

H. S. Li and K. T. Mahanthappa

1994-05-15T23:59:59.000Z

471

Metal-Insulator Transition Revisited for Cold Atoms in Non-Abelian Gauge Potentials  

E-Print Network (OSTI)

We discuss the possibility of realizing metal-insulator transitions with ultracold atoms in two-dimensional optical lattices in the presence of artificial gauge potentials. Such transitions have been extensively studied for magnetic fields corresponding to Abelian gauges; they occur when the magnetic flux penetrating the lattice plaquette is an irrational multiple of the magnetic flux quantum. Here we present the first study of these transitions for non-Abelian U(2) gauge fields, which can be realized with atoms with two pairs of degenerate internal states. In contrast to the Abelian case, the spectrum and localization transition in the non-Abelian case is strongly influenced by atomic momenta. In addition to determining the localization boundary, the momentum fragments the spectrum and the minimum energy viewed as a function of momentum exhibits a step structure. Other key characteristics of the non-Abelian case include the absence of localization for certain states and satellite fringes around the Bragg peaks in the momentum distribution and an interesting possibility that the transition can be tuned by the atomic momenta.

Indubala I. Satija; Daniel C. Dakin; Charles W. Clark

2006-07-10T23:59:59.000Z

472

Lattice gauge action suppressing near-zero modes of H{sub W}  

SciTech Connect

We propose a lattice action including unphysical Wilson fermions with a negative mass m{sub 0} of the order of the inverse lattice spacing. With this action, the exact zero mode of the Hermitian Wilson-Dirac operator H{sub W}(m{sub 0}) cannot appear and near-zero modes are strongly suppressed. By measuring the spectral density {rho}({lambda}{sub W}), we find a gap near {lambda}{sub W}=0 on the configurations generated with the standard and improved gauge actions. This gap provides a necessary condition for the proof of the exponential locality of the overlap-Dirac operator by Hernandez, Jansen, and Luescher. Since the number of near-zero modes is small, the numerical cost to calculate the matrix sign function of H{sub W}(m{sub 0}) is significantly reduced, and the simulation including dynamical overlap fermions becomes feasible. We also introduce a pair of twisted mass pseudofermions to cancel the unwanted higher mode effects of the Wilson fermions. The gauge coupling renormalization due to the additional fields is then minimized. The topological charge measured through the index of the overlap-Dirac operator is conserved during continuous evolutions of gauge field variables.

Fukaya, Hidenori [Theoretical Physics Laboratory, RIKEN, Wako 351-0198 (Japan); Hashimoto, Shoji; Kaneko, Takashi; Yamada, Norikazu [High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801 (Japan); School of High Energy Accelerator Science, The Graduate University for Advanced Studies (Sokendai), Tsukuba 305-0801 (Japan); Ishikawa, Ken-Ichi [Department of Physics, Hiroshima University, Higashi-Hiroshima 739-8526 (Japan); Matsufuru, Hideo [High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801 (Japan); Onogi, Tetsuya [Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)

2006-11-01T23:59:59.000Z

473

A battery chemistry-adaptive fuel gauge using probabilistic data association  

Science Journals Connector (OSTI)

Abstract This paper considers the problem of state of charge (SOC) tracking in Li-ion batteries when the battery chemistry is unknown. It is desirable for a battery fuel gauge (BFG) to be able to perform without any offline characterization or calibration on sample batteries. All the existing approaches for battery fuel gauging require at least one set of parameters, a set of open circuit voltage (OCV) parameters, that need to be estimated offline. Further, a BFG with parameters from offline characterization will be accurate only for a “known” battery chemistry. A more desirable BFG is one that is accurate for “any” battery chemistry. In this paper, we show that by storing finite sets of OCV parameters of possible batteries, we can derive a generalized BFG using the probabilistic data association (PDA) algorithm. The PDA algorithm starts by assigning prior model probabilities (typically equal) for all the possible models in the library and recursively updates those probabilities based on the voltage and current measurements. In the event of an unknown battery to be gauged, the PDA algorithm selects the most similar OCV model to the battery from the library. We also demonstrate a strategy to select the minimum sets of OCV parameters representing a large number of Li-ion batteries. The proposed approaches are demonstrated using data from portable Li-ion batteries.

G.V. Avvari; B. Balasingam; K.R. Pattipati; Y. Bar-Shalom

2015-01-01T23:59:59.000Z

474

Basic canonical brackets in the gauge field theoretic models for the Hodge theory  

E-Print Network (OSTI)

We deduce the canonical brackets for a two (1 + 1)-dimensional (2D) free Abelian 1-form as well as a four (3 + 1)-dimensional (4D) 2-form gauge theory by exploiting the beauty and strength of the continuous symmetries of the Becchi-Rouet-Stora-Tyutin (BRST) invariant Lagrangian densities that respect, in totality, six continuous symmetries. These symmetries entail upon these models to become the field theoretic examples for the Hodge theory. Taken together, these symmetries enforce the existence of exactly the same canonical brackets amongst the creation and annihilation operators that appear in the canonical method of quantization for the normal mode expansion of the basic fields of these theories. In other words, we provide an alternative to the canonical method of quantization for our present gauge field theoretic models for the Hodge theory where the continuous symmetries play a decisive role. We conjecture that our method of quantization would be valid for any arbitrary gauge field theoretic model for th...

Gupta, S; Malik, R P

2014-01-01T23:59:59.000Z

475

Basic canonical brackets in the gauge field theoretic models for the Hodge theory  

E-Print Network (OSTI)

We deduce the canonical brackets for a two (1 + 1)-dimensional (2D) free Abelian 1-form as well as a four (3 + 1)-dimensional (4D) 2-form gauge theory by exploiting the beauty and strength of the continuous symmetries of the Becchi-Rouet-Stora-Tyutin (BRST) invariant Lagrangian densities that respect, in totality, six continuous symmetries. These symmetries entail upon these models to become the field theoretic examples for the Hodge theory. Taken together, these symmetries enforce the existence of exactly the same canonical brackets amongst the creation and annihilation operators that appear in the canonical method of quantization for the normal mode expansion of the basic fields of these theories. In other words, we provide an alternative to the canonical method of quantization for our present gauge field theoretic models for the Hodge theory where the continuous symmetries play a decisive role. We conjecture that our method of quantization would be valid for any arbitrary gauge field theoretic model for the Hodge theory in any arbitrary dimension of spacetime.

S. Gupta; R. Kumar; R. P. Malik

2014-01-12T23:59:59.000Z

476

Resumming planar diagrams for the N=6 ABJM cusped Wilson loop in light-cone gauge  

E-Print Network (OSTI)

We analyse a light-like cusped Wilson loop in N=6 superconformal Chern-Simons theory at both weak and strong coupling in light-cone gauge. At the second order in the 't Hooft coupling $\\lambda$ the correct cusp anomalous dimension $\\Gamma_{\\rm cusp}=-\\phi / 2 \\lambda^2$ is recovered through a deformation of the contour that takes both rays of the cusp slightly off of the light-cone. The strong coupling behaviour is addressed by means of the Bethe-Salpeter equation for ladders of tree-level gauge propagators and ladders of one-loop corrected gauge propagators. It turns out that, as might be expected, the contribution of Chern-Simons tree-level propagators is insensitive of the cusp angle $\\phi$. On the other hand, corrected propagators lead to an exponential large $\\lambda$ behaviour $\\Gamma_{\\rm cusp} \\sim \\exp\\sqrt{\\lambda\\phi}$ which, though, disagrees with the AdS/CFT predictions in the power of $\\phi$.

Daniele Marmiroli

2012-11-20T23:59:59.000Z

477

Building Technologies Program: Tax Deduction Qualified Software-EnergyGauge Summit version 3.1 build 2  

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

Provides required documentation that EnergyGauge Summit version 3.1 build 2 meets Internal Revenue Code §179D, Notice 2006-52, dated January 31, 2007, for calculating commercial building energy and power cost savings.

478

Conformal Gauge Mediation and Light Gravitino of Mass m_{3/2} < O(10) eV  

SciTech Connect

We discuss a class of gauge mediated supersymmetry breaking models with conformal invariance above the messenger mass scale (conformal gauge mediation). The spectrum of the supersymmetric particles including the gravitino is uniquely determined by the messenger mass. When the conformal fixed point is strongly interacting, it predicts a light gravitino of mass m{sub 3/2} < O(10) eV, which is attractive since such a light gravitino causes no problem in cosmology.

Ibe, M.; /SLAC; Nakayama, Y.; /UC, Berkeley; Yanagida, T.T.; /Tokyo U.

2008-04-08T23:59:59.000Z

479

Could gauge gravitational degrees of freedom play the role of environment in "extended phase space" version of quantum geometrodynamics?  

E-Print Network (OSTI)

In the context of the recently proposed formulation of quantum geometrodynamics in extended phase space we discuss the problem how the behavior of the Universe, initially managed by quantum laws, has become classical. In this version of quantum geometrodynamics we quantize gauge gravitational degrees of freedom on an equal basis with physical degrees of freedom. As a consequence of this approach, a wave function of the Universe depends not only on physical fields but also on gauge degrees of freedom. From this viewpoint, one should regard the physical Universe as a subsystem whose properties are formed in interaction with the subsystem of gauge degrees of freedom. We argue that the subsystem of gauge degrees of freedom may play the role of environment, which, being taken into account, causes the density matrix to be diagonal. We show that under physically reasonable fixing of gauge condition the density matrix describing the physical subsystem of the Universe may have a Gaussian peak in some variable, but it could take the Gaussian form only within a spacetime region where a certain gauge condition is imposed. If spacetime manifold consists of regions covered by different coordinate charts the Universe cannot behave in a classical manner nearby borders of these regions. Moreover, in this case the Universe could not stay in the same quantum state, but its state would change in some irreversible way.

T. P. Shestakova

2003-09-24T23:59:59.000Z

480

Light dark matter from the U(1){sub X} sector in the NMSSM with gauge mediation  

SciTech Connect

Cosmic ray anomalies observed by PAMELA and Fermi-LAT experiments may be interpreted by heavy (TeV-scale) dark matter annihilation enhanced by Sommerfeld effects mediated by a very light (sub-GeV) U(1){sub X} gauge boson, while the recent direct searches from CoGeNT and DAMA/LIBRA experiments may indicate a rather light ( ? 7 GeV) dark matter with weak interaction. Motivated by these apparently different scales, we consider a gauge mediated next-to-the minimal supersymmetric standard model (NMSSM) entended with a light U(1){sub X} sector plus a heavy sector ( H-bar {sub h},H{sub h}), which can provide both a light ( ? 7 GeV) and a heavy (TeV-scale) dark matter without introducing any ad hoc new scale. Through the Yukawa coupling between H{sub h} and the messager fields, the U(1){sub X} gauge symmetry is broken around the GeV scale radiatively and a large negative m{sub S}{sup 2} is generated for the NMSSM singlet S. Furthermore, the small kinetic mixing parameter between U(1){sub X} and U(1){sub Y} is predicted to be ? ? 10{sup ?5}?10{sup ?6} after integrating out the messengers. Such a light dark matter, which can have a normal relic density from the late decay of the right-handed sneutrino (assumed to be the ordinary next-to-the lightest supersymmetric particle and thermally produced in the early Universe), can serve a good candidate to explain the recent CoGeNT and DAMA/LIBRA results.

Kang, Zhaofeng; Li, Tianjun; Liu, Tao; Tong, Chunli; Yang, Jin Min, E-mail: zhfkang@itp.ac.cn, E-mail: tli@itp.ac.cn, E-mail: tliuphy@itp.ac.cn, E-mail: piggy1983@gmail.com, E-mail: jmyang@itp.ac.cn [Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Academia Sinica, Zhongguancun East Road, Beijing 100190 (China)

2011-01-01T23:59:59.000Z

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481

Fortran MPI Checkerboard Code for SU(3) Lattice Gauge Theory I  

E-Print Network (OSTI)

We document Fortran MPI checkerboard code for Markov Chain Monte Carlo simulations of pure SU(3) lattice gauge theory with the Wilson action on a D-dimensional double-layered torus. This includes the usual torus with periodic boundary conditions as an optional case. We use Cabibbo-Marinari heatbath checkerboard updating. Parallelization on sublattices is implemented in all D directions and can be restricted to less than D directions. The parallelization techniques of this paper can be used for any model with interactions of link variables defined on plaquettes.

Bernd A. Berg

2009-04-03T23:59:59.000Z

482

Incompatibility of self-charge conjugation with helicity eigenstates and gauge interactions  

E-Print Network (OSTI)

In this essay, an ab initio study of the self/anti-self charge conjugate (1/2,\\,0)\\oplus(0,\\,1/2) representation space is presented. Incompatibility of self/anti-self charge conjugation with helicity eigenstates and gauge interactions is demonstrated. Parity violation is seen as an intrinsic part of the self/anti-self charge conjugate construct. From a phenomenological point of view, an essential part of the theory is the Bargmann-Wightman-Wigner-type boson, where a boson and its antiboson carry opposite relative intrinsic parity.

Ahluwalia, D V

1994-01-01T23:59:59.000Z

483

Incompatibility of Self-Charge Conjugation with Helicity Eigenstates and Gauge Interactions  

E-Print Network (OSTI)

In this essay, an {\\it ab initio} study of the self/anti-self charge conjugate $(1/2,\\,0)\\oplus(0,\\,1/2)$ representation space is presented. Incompatibility of self/anti-self charge conjugation with helicity eigenstates and gauge interactions is demonstrated. Parity violation is seen as an intrinsic part of the self/anti-self charge conjugate construct. From a phenomenological point of view, an essential part of the theory is the Bargmann-Wightman-Wigner-type boson, where a boson and its antiboson carry opposite relative intrinsic parity.

Dharam V. Ahluwalia

1994-04-16T23:59:59.000Z

484

The CP(N-1) Affine Gauge Theory in the Dynamical Space-time  

E-Print Network (OSTI)

An attempt to build quantum theory of field (extended) objects without a priori space-time geometry has been represented. Space-time coordinates are replaced by the intrinsic coordinates in the tangent fibre bundle over complex projective Hilbert state space $CP(N-1)$. The fate of a quantum system modeled by the generalized coherent states is rooted in this manifold. Dynamical (state-dependent) space-time arises only at the stage of the quantum "yes/no" measurement. The quantum measurement of the gauge ``field shell'' of the generalized coherent state is described in terms of the affine parallel transport of the local dynamical variables in $CP(N-1)$.

Peter Leifer

2006-05-25T23:59:59.000Z

485

The affine gauge theory in the quantum phase space CP(N-1)  

E-Print Network (OSTI)

In the present article I propose a non-linear relativistic 4-d field model originated by the internal dynamics in CP(N-1). There is no initially distinction between `particle' and `field', and the space-time manifold is derivable. The main idea is to base the theory on the relative amplitudes solely. Quantum measurements will be described in terms of the parallel transport of the local dynamical variables and a specific gauge reduction of the full state vector to the Qubit coherent state. I will discuss here field equations of quantum particle arising in the dynamical space-time.

Peter Leifer

2005-03-19T23:59:59.000Z

486

The role of quantum recurrence in superconductivity, carbon nanotubes and related gauge symmetry breaking  

E-Print Network (OSTI)

Pure quantum phenomena are characterized by intrinsic recurrences in space and time. We use such an intrinsic periodicity as a quantization condition to derive the essential phenomenology of superconductivity. The resulting description is based on fundamental quantum dynamics and geometrical considerations, rather than on microscopical characteristics of the superconducting materials. This allows for the interpretation of the related gauge symmetry breaking by means of the competition between quantum recurrence and thermal noise. We also test the validity of this approach to describe the case of carbon nanotubes.

Donatello Dolce; Andrea Perali

2014-09-29T23:59:59.000Z

487

Scalar ? signal at CERN LEP 2 in models with gauge-mediated supersymmetry breaking  

Science Journals Connector (OSTI)

In theories with gauge-mediated supersymmetry breaking, the scalar ?, (??1) is the lightest observable superpartner for part of the parameter space. At CERN LEP 2, the production of such a ??1 pair and their subsequent decays give rise to a pair of ? leptons plus missing energy from the unobserved gravitinos. The angular distributions of the ?’s are different from those arising from the production and decay of W pairs, and thus will constitute an interesting signal for supersymmetry. We also consider ??1 pair production in the complementary part of parameter space where the lightest neutralino is lighter than the ??1.

D. A. Dicus, B. Dutta, and S. Nandi

1997-11-01T23:59:59.000Z

488

Gauge-Higgs-fermion spin-spin effects at the Stanford Linear Collider (and CERN LEP)  

Science Journals Connector (OSTI)

We consider the various spin-spin effects in the processes e+e-???i0??j0 and e+e-???i+??j- at Stanford Linear Collider (SLC) energies, where ??j0 and ??j± are gauge-Higgs fermions associated with the (minimal) supersymmetric extension of the standard SU3c×SU2L×U1 model and are understood to decay in model-dependent ways. We argue that such effects may very well be visible at SLC (and CERN LEP) energies. We give a general theoretical apparatus for discussing these effects and assessing their various manifestations. We work out some illustrative examples of such manifestations.

B. F. L. Ward

1987-04-01T23:59:59.000Z

489

Covariant formulations of Baumgarte, Shapiro, Shibata, and Nakamura and the standard gauge  

SciTech Connect

The Baumgarte-Shapiro-Shibata-Nakamura (BSSN) and standard gauge equations are written in covariant form with respect to spatial coordinate transformations. The BSSN variables are defined as tensors with no density weights. This allows us to evolve a given set of initial data using two different coordinate systems and to relate the results using the familiar tensor transformation rules. Two variants of the covariant equations are considered. These differ from one another in the way that the determinant of the conformal metric is evolved.

Brown, J. David [Department of Physics, North Carolina State University, Raleigh, North Carolina 27695 (United States)

2009-05-15T23:59:59.000Z

490

What Lattice QCD tell us about the Landau Gauge Infrared Propagators  

E-Print Network (OSTI)

The calculation of the Landau gauge gluon propagator performed in Coimbra using lattice QCD simulations is reviewed. Particular attention is given to the behavior of the gluon propagator in the infrared region and the value of $D(0)$. In the second part of the article, the modeling of the lattice data using massive type propagators and Gribov type propagators is discussed. Four different mass scales are required to describe the propagator over the full range of momenta accessed by the simulations discussed here. Furthermore, assuming a momentum dependent gluon mass, we sketch on its functional dependence.

O. Oliveira; P. J. Silva; P. Bicudo

2011-01-31T23:59:59.000Z

491

Bulk Thermodynamics of SU(N) Lattice Gauge Theories at Large-N  

E-Print Network (OSTI)

We present a study of bulk thermodynamical quantities in the deconfined phase of pure lattice SU(N) gauge theories. We find that the deficit in pressure and entropy with respect to their free-gas values, for N=4,8, is remarkably close to that of SU(3). Th is suggests that understanding the strongly interacting nature of the deconfined phase, which is crucial for RHIC physics, can be done at large N. There, different analytical approaches simplify or become soluble, and one can check their predictions and point to their important ingredients.

Barak Bringoltz

2005-11-04T23:59:59.000Z

492

The Temperature Dependence of the SU(N) Gluon Condensate from Lattice Gauge Theory  

E-Print Network (OSTI)

An analysis of the temperature dependence of the leading contributions to the gluon condensate for SU(N) lattice gauge theory is presented using the data from recent Monte Carlo simulations. The gluon condensate is calculated directly from the new lattice calculations of the interaction measure. It is shown how these computations provide a simple picture for the melting of the condensate around the deconfinement temperature, and the fact that it is negative, and increases in magnitude, above Tc. We close with a discussion of the implications for full QCD of recent results from simulations including fermions.

Graham Boyd; David E. Miller

1996-08-29T23:59:59.000Z

493

Spectrum of the QCD flux tube in 3d SU(2) lattice gauge theory  

E-Print Network (OSTI)

Evidence from the lattice suggests that formation of a flux tube between a $q\\bar{q}$ pair in the QCD vacuum leads to quark confinement. For large separations between the quarks, it is conjectured that the flux tube has a behaviour similar to an oscillating bosonic string, supported by lattice data for the groundstate $q\\bar{q}$ potential. We measure the excited states of the flux tube in 3d SU(2) gauge theory with three different couplings inside the scaling region. We compare our results to predictions of effective string theories.

Bastian B. Brandt; Pushan Majumdar

2009-05-26T23:59:59.000Z

494

Proposal for feasible experiments of cold-atom quantum simulator of U(1) lattice gauge-Higgs model  

E-Print Network (OSTI)

Lattice gauge theory has provided us with a crucial non-perturbative method in studying canonical models in high-energy physics such as quantum chromodynamics. Among other models of lattice gauge theory, the lattice gauge-Higgs model is a quite important one because it describes wide variety of phenomena/models related to the Anderson-Higgs mechanism such as superconductivity, the standard model of particle physics, and inflation process of the early universe. In this paper, to realize a quantum simulator of the U(1) lattice gauge-Higgs model on an optical lattice filled by cold atoms, we propose two feasible methods: (i) Wannier states in the excited bands and (ii) dipolar atoms in a multilayer optical lattice. We pay attentions to respect the constraint of Gauss's law and avoid nonlocal gauge interactions. Numerical simulations of the time development of an electric flux by using the Gross-Pitaevskii equations reveal some interesting characteristics of dynamical aspect of the model.

Yoshihito Kuno; Kenichi Kasamatsu; Yoshiro Takahashi; Ikuo Ichinose; Tetsuo Matsui

2014-12-24T23:59:59.000Z

495

UV Completions of Partial Compositeness: The Case for a SU(4) Gauge Group  

E-Print Network (OSTI)

We present a model of partial compositeness arising as the IR limit of a SU(4) gauge theory with only fermionic matter. This group is one of the most promising ones among a handful of possible choices allowing a symmetry breaking pattern incorporating custodial symmetry and a top partner candidate, while retaining asymptotic freedom. It is favored for not giving rise to lepto-quarks or Landau poles in the SM gauge couplings. The minimal UV theory consists of five hyperfermions in the anti-symmetric representation and three in the fundamental and anti-fundamental. The IR theory is centered around the coset SU(5)/SO(5), with top partners in the fundamental of SO(5), giving rise to one composite fermion of electric charge 5/3, three of charge 2/3 and one of charge -1/3. Electro-Weak symmetry breaking occurs via top-quark-driven vacuum misalignment. The top quark mass is generated via the mechanism of partial compositeness, while the remaining fermions acquire a mass via a standard quadratic coupling to the Higgs. We compute the top and bottom quark mass matrix and the Electro-Weak currents of the composite fermions. The model does not give rise to unacceptably large deviations from the SM Z\\to b \\bar b decay width.

Gabriele Ferretti

2014-04-28T23:59:59.000Z

496

Placement accuracy gauge for electrical components and method of using same  

DOE Patents (OSTI)

Surface mounted electrical components are typically assembled on printed wiring board by automatic machines. It is important that the machines accurately move with respect to both X and Y rotational axes in order to insure that components are positioned precisely on connector pads of the printed wiring board being assembled. In accordance with the instant invention, a gauge is used to facilitate convenient accuracy checks. The gauge is a glass substrate on which grids of 0.005 inch lines are scribed to form location and orientation fields where components are to be placed. The grids are referenced from ether fiducial marks or the edge of the substrate to establish known positions within the grids. The equipment to be evaluated is programmed to place components in known positions and the components are held in place by tacky adhesive that is sprayed on the substrate prior to placing the components. The accuracy of the component position is then compared to the programmed position by placing the substrate on a light table and observing the component location. If a significant inaccuracy with respect to any of the axes exists, the inaccuracy is apparent because the component is not aligned properly with the grid. If a precise measurement of an axis inaccuracy is desired, a measuring microscope may be utilized. 6 figs.

Biggs, P.M.; Dancer, L.K.; Yerganian, S.S.

1987-11-12T23:59:59.000Z

497

Thermodynamics of large-$N$ gauge theories on a sphere: weak versus strong coupling  

E-Print Network (OSTI)

Recently lattice simulation in pure Yang-Mills theory has exhibited significant quadratic corrections for both the thermodynamic quantities and the renormalized Polyakov loop in the deconfined phase. These terms are previously found to appear naturally for ${\\mathcal N}=4$ Super Yang-Mills (SYM) on a sphere at strong coupling, through the gauge/string duality. Here we extend the investigation to the weak coupling regime, and for general large-$N$ gauge theories. Employing the matrix model description, we find some novel behavior in the deconfined phase, which is not noticed in the literature. Due to the non-uniform distribution of the eigenvalues, the deviation of the Polyakov loop from unity starts from $1/T^3$ instead of $1/T^2$. Such a power is fixed by the space dimension and do not change with the coupling. This type of deviation further induces odd temperature powers in the free energy, together with logarithmic factors. These are quite different from the strong-coupled ${\\mathcal N}=4$ SYM and the latt...

Zuo, Fen

2014-01-01T23:59:59.000Z

498

Placement accuracy gauge for electrical components and method of using same  

DOE Patents (OSTI)

Surface mounted electrical components are typically assembled on printed wiring boards by automatic machines. It is important that the machines accurately move with respect to both X and Y rotational axes in order to insure that components are positioned precisely on connector pads of the printed wiring board being assembled. In accordance with the instant invention, a gauge is used to facilitate convenient accuracy checks. The gauge is a glass substrate on which grids of 0.005 inch lines are scribed to form location and orientation fields where components are to be placed. The grids are referenced from either fiducial marks or the edge of the substrate to establish known positions within the grids. The equipment to be evaluated is programmed to place components in known positions and the components are held in place by tacky adhesive that is sprayed on the substrate prior to placing the components. The accuracy of the component position is then compared to the programmed position by placing the substrate on a light table and observing the component location. If a significant inaccuracy with respect to any of the axes exists, the inaccuracy is apparent because the component is not aligned properly with the grid. If a precise measurement of an axis inaccuracy is desired, a measuring microscope may be utilized.

Biggs, Peter M. (Overland Park, KS); Dancer, Linda K. (Independence, MO); Yerganian, Simon S. (Grandview, MO)

1988-10-11T23:59:59.000Z

499

Dismantling of Radium-226 Coal Level Gauges: Encountered Problems and How to Solve  

SciTech Connect

This paper describes the techniques for dismantling of disused-sealed Radium-226 (Ra-226) coal level gauges which the source specifications and documents were not available, including problems occurred during dismantling stage and the decision making in solving all those obstacles. The 2 mCi (20 pieces), 6 mCi (20 pieces) and 6.6 mCi (30 pieces) of Ra-226 hemi-spherically-shaped with lead-filled coal level gauges were used in industrial applications for electric power generation. All sources needed to be dismantled for further conditioning as requested by the International Atomic Energy Agency (IAEA). One of the 2 mCi Ra-226 source was dismantled under the supervision of IAEA expert. Before conditioning period, each of the 6 mCi and 6.6 mCi sources were dismantled and inspected. It was found that coal level gauges had two different source types: the sealed cylindrical source (diameter 2 cm x 2 cm length) locked with spring in lead housing for 2 mCi and 6.6 mCi; while the 6 mCi was an embedded capsule inside source holder stud assembly in lead-filled housing. Dismantling Ra-226 coal level gauges comprised of 6 operational steps: confirmation of the surface dose rate on each source activity, calculation of working time within the effective occupational dose limit, cutting the weld of lead container by electrical blade, confirmation of the Ra-226 embedded capsule size using radiation scanning technique and gamma radiography, automatic sawing of the source holder stud assembly, and transferring the source to store in lead safe box. The embedded length of 6 mCi Ra-226 capsule in its diameter 2 cm x 14.7 cm length stud assembly was identified, the results from scanning technique and radiographic film revealed the embedded source length of about 2 cm, therefore all the 6 mCi sources were safely cut at 3 cm using the automatic saw. Another occurring problem was one of the 6.6 mCi spring type source stuck inside its housing because the spring was deformed and there was previously a leakage on inner source housing. Thus, during manufacturing the filled-lead for shielding passed through this small hole and fixed the deformed spring together with the source. The circular surface of inner hole was measured and slowly drilled at a diameter 2.2 cm behind shielding, till the spring and the fixed lead sheet were cut, therefore the source could be finally hammered out. The surface dose rate of coal level gauges before weld cutting was 10-15 mR/hr and the highest dose rate at the position of the weld cutter was 2.5 mR/hr. The total time for each weld cutting and automatic sawing was 2-3 minutes and 1 minute, respectively. The source was individually and safely transferred to store in lead safe box using a 1-meter length tong and a light container with 1 meter length handle. The total time for Ra-226 (70 pieces) dismantling, including the encountered problems and their troubles shooting took 4 days operation in which the total dose obtained by 18 operators were ranged from 1-38 {mu}Sv. The dismantling team safely completed the activities within the effective dose limit for occupational exposure of 20 mSv/year (80 {mu}Sv/day). (authors)

Punnachaiya, M.; Nuanjan, P.; Moombansao, K.; Sawangsri, T.; Pruantonsai, P.; Srichom, K. [Office of Atoms for Peace (OAP), Vibhavadi Rangsit Road, Chatuchak District, Bangkok 10900 (Thailand)

2006-07-01T23:59:59.000Z

500

Quantum phase transition of ultracold bosons in the presence of a non-Abelian synthetic gauge field  

SciTech Connect

We study the Mott phases and the superfluid-insulator transition of two-component ultracold bosons on a square optical lattice in the presence of a non-Abelian synthetic gauge field, which renders a SU(2)-hopping matrix for the bosons. Using a resummed hopping expansion, we calculate the excitation spectra in the Mott insulating phases and demonstrate that the superfluid-insulator phase boundary displays a nonmonotonic dependence on the gauge-field strength. We also compute the momentum distribution of the bosons in the presence of the non-Abelian field and show that they develop peaks at nonzero momenta as the superfluid-insulator transition point is approached from the Mott side. Finally, we study the superfluid phases near the transition and discuss the induced spatial pattern of the superfluid density due to the presence of the non-Abelian gauge potential.

Grass, T. [ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, ES-08860 Castelldefels, Barcelona (Spain); Saha, K.; Sengupta, K. [Theoretical Physics Department, Indian Association for the Cultivation of Science, Kolkata-700032 (India); Lewenstein, M. [ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, ES-08860 Castelldefels, Barcelona (Spain); ICREA-Institucio Catalana de Recerca i Estudis Avancats, Lluis Companys 23, ES-08010 Barcelona (Spain)

2011-11-15T23:59:59.000Z